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QC/T 699-2019: Tail-lifts for vehicles
Status: Valid QC/T 699: Evolution and historical versions
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Tail-lifts for vehicles
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PDF similar to QC/T 699-2019
Standard similar to QC/T 699-2019 QC/T 911 NB/T 10354 GB 20300 QC/T 849 Basic data | Standard ID | QC/T 699-2019 (QC/T699-2019) | | Description (Translated English) | Tail-lifts for vehicles | | Sector / Industry | Automobile & Vehicle Industry Standard (Recommended) | | Classification of Chinese Standard | T59 | | Word Count Estimation | 29,213 | | Date of Issue | 2019-08-02 | | Date of Implementation | 2020-01-01 | | Older Standard (superseded by this standard) | QC/T 699-2004 | | Regulation (derived from) | Natural Resources Department Announcement No. 7 of 2019 | | Issuing agency(ies) | Ministry of Industry and Information Technology | QC/T 699-2019: Tail-lifts for vehicles---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Tail-lifts for vehicles
ICS 43.160
T 59
QC
People's Republic of China Automotive Industry Standard
Replace QC/T 699-2004
Lifting tail plate for vehicle
2019-8-27 released
2020-1-1 implementation
Issued by the Ministry of Industry and Information Technology of the People's Republic of China
Table of contents
Foreword...II
1 Scope...1
2 Normative references...1
3 Terms and definitions...1
4 Types and preferred series...4
5 Technical requirements...5
6 Test method...8
7 Inspection rules...10
8 Usage information...12
9 Packaging, transportation, storage...14
Appendix A (informative appendix) Typical structure of tail plate...15
Appendix B (Normative Appendix) Prevention of Extrusion and Shearing...21
Appendix C (Normative Appendix) Inspections to be implemented by installers...27
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces QC/T 699-2004 "Vehicle Lifting Tail Plate". Compared with QC/T 699-2004, in addition to editorial changes, the main technical
The changes are as follows.
-Modified the scope of application of the standards in Chapter 1 (see Chapter 1);
--Added tailgate, closed position, working position, tilt, rated load, maximum load, platform vertical movement distance, maximum
Terms and definitions of lifting height, no-load ascent speed, and rated working pressure (see 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8,
3.9, 3.10, 3.11, 3.13);
-Modified the type and preferred series of parameters (see Chapter 4,.2004 Edition 4);
--- Increased the requirements for the no-load ascent speed of the tailgate, the opening/closing speed requirements of the platform, and the tilt speed requirements under the rated load (see
5.2.1.2, 5.2.1.3, 5.5.5.3);
--Modified the requirements for the load descent speed of the tail plate under the rated load (see 5.2.2.2,.2004 edition 5.3.2.3);
-Modified the requirements for the static variation of the tailboard load (see 5.2.4,.2004 edition 5.3.2.4);
---Added rear lower protection requirements (see 5.3.1);
--- Added safety protection measures to prevent relevant staff from being squeezed and sheared (see 5.3.3);
-Added mechanical limit devices, control system protection measures, tailgate guardrails, tailgate warning devices, tailgate stop devices, and cab
Indicating device, hydraulic system leakage safety device, platform drop when pipeline fails, suspension drive safety device, ground lifting load, marking amount
Fixed load centroid position and platform safety requirements (see 5.3.5, 5.3.6, 5.3.8, 5.3.9, 5.3.10, 5.3.11, 5.3.12, 5.3.13,
5.3.14, 5.3.15, 5.3.16, 5.3.17, 5.3.18);
-Modified the maximum pressure requirement of the hydraulic system pressure limiting device setting (see 5.3.19.7,.2004 edition 5.4.4);
--Added the requirements of the control system (see 5.3.20);
-Modified the reliability requirements (see 5.4,.2004 edition 5.7);
--- Added no-load ascent speed test method, open/close speed test method, and tilt speed test method (see 6.3.3, 6.3.4, 6.3.7);
-Modified the test method of the position change before and after loading (see 6.3.8,.2004 version 6.4.4);
--Modified the test method of the static variation of the load (see 6.3.9,.2004 edition 6.4.3);
--Modified the inspection and verification methods of safety and protection measures (see 6.4,.2004 edition 6.6);
-Modified the number of reliability tests (see 6.5,.2004 edition 6.8);
- Modified the conditions and items of type inspection (see 7.3,.2004 edition 7);
- Modified the instructions and marking requirements (see Chapter 8,.2004 Edition 8).
This standard was proposed and managed by the National Automotive Standardization Technical Committee (SAC/TC114).
Drafting organizations of this standard. Shenzhen Kaizhuoli Hydraulic Equipment Co., Ltd., Shaanxi Anzhong Automobile Tailgate Co., Ltd., Dongguan City
Dacheng Machinery Manufacturing Co., Ltd., Hanyang Special Purpose Vehicle Research Institute, Shandong Shuibo Welding and Cutting Equipment Manufacturing Co., Ltd.
The main drafters of this standard. Liang Shangyu, Deng Bin, Yi Runbo, Gao Guoguo, Liu Shuai, Wang Zeli, Wang Donghui, Ma Tao, Chi Weixiang, Qiu Tianyue.
The previous editions of the standard replaced by this standard are as follows.
--QC/T 699-2004.
Lifting tail plate for vehicle
1 Scope
This standard specifies the terms and definitions, types and preferred series, technical requirements, test methods, inspection rules, use
Use information, packaging, transportation and storage.
This standard is applicable to vehicle lifting tail plates (hereinafter referred to as tail plates) installed on road transport vehicles for loading and unloading goods.
The tail plate on other wheeled vehicles can be implemented by reference.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document.
For undated references, the latest version (including all amendments) applies to this document.
GB/T 3766 General technical conditions for hydraulic systems
GB 4785 Regulations for the installation of external lighting and light signal devices for automobiles and trailers
GB/T 6739 Paint and varnish pencil method to measure the hardness of paint film
GB/T 7935-2005 General technical conditions for hydraulic components
GB/T 9286 Cross-cut test of paint and varnish film
GB/T 9969 Industrial Product Manual, General Provisions
GB 11567 Protection requirements for side and rear bottom of cars and trailers
GB/T 19671-2005 Mechanical safety two-hand control device function status and design principles
GB/T 19678-2005 Compilation composition, content and presentation method of manual
GB 25990 car tail sign board
JB/T 5943 General technical conditions for welding parts of construction machinery
JB/T 6996-2007 Heavy machinery hydraulic system general technical conditions
JB/T 8727 hydraulic hose assembly
QC/T 518 Tightening torque of threaded fasteners for automobiles
QC/T 29104 The limit of solid particle pollution of hydraulic oil in hydraulic system of special vehicle
QC/T 29105 Test Method for Solid Particle Pollution Degree of Hydraulic Oil in Special Vehicle Hydraulic System
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Tail lift
A lifting device installed on a vehicle for loading and unloading goods. The necessary components of the device include. carrying platform (hereinafter referred to as the flat
Taiwan), drive system, support structure and controller.
3.2
Close position
When the vehicle is in a normal driving state, the tailgate is in a safe closed position, see Figure 1a).
3.3
Working position
When loading and unloading cargo, any position of the tailgate is shown in Figure 1b) to Figure 1f) and any intermediate position.
3.4
Tilting
When the tailboard is in the working position, the movement process of adjusting the vertical angle of the platform. See Figure 1d), Figure 1e).
a) Closed position b) Open and level with the bottom surface of the carriage c) Lower to the ground
d) Tilt down e) Tilt up f) Rise to be level with the bottom of the carriage
g) closed
3.5
Platform width
The dimension (W) of the parallel direction between the platform and the approaching edge of the vehicle is shown in Figure 2.
3.6
Platform depth
The vertical dimension (D) of the platform and the approaching edge of the vehicle is shown in Figure 2.
W platform width;
D platform depth;
G load centroid, the intersection of the centroid line in the depth direction of the platform and the center line in the width direction;
d The distance between the center of mass line in the depth direction of the platform and the edge of the platform near the side of the carriage is 1/2 or 600mm of the platform depth (whichever is smaller).
If the manufacturer stipulates otherwise, the manufacturer's stipulated value shall prevail.
Figure 2 Center of mass of platform width, platform depth and rated load
3.7
Nominal load
The maximum lifting mass allowed by the tail plate when the load centroid is at the position shown in G in Figure 2.The rated load is a fixed value.
3.8
Maximum load
The upper limit of the load allowed when the center of mass of the load is at different positions on the platform. Specified by the manufacturer.
3.9
Platform vertical travel distance
The platform remains horizontal, and the maximum distance that can be moved from the lowest to the highest position is shown in Figure 3.
3.10
Maximum lifting height max distance
The platform remains level and rises to the highest position. The distance between the platform and the ground is shown in Figure 3.
3.11
No-load up speed
The vertical movement speed of the platform in a horizontal state, no load, ascending movement (see Figure 1 f)).
3.12
Load down speed
The platform is in a horizontal state, the load is placed according to the regulations, and the vertical movement speed of the descending movement (see Figure 1 c)).
3.13
Working pressure
The pressure of the hydraulic system when the rated load is applied and the components are in a stable lifting and/or tilting operation state.
4 types and preferred series
4.1 Refer to Appendix A for the typical structure of the tail plate.
4.2 Preferred series
The rated load of the tailboard and the size of the load-bearing platform should be determined according to the height, width and cargo size of the vehicle, and the following series should be selected.
5 Technical requirements
5.1 General requirements
5.1.1 The tail plate shall comply with the provisions of this standard and be manufactured in accordance with the product drawings and technical documents approved by the prescribed procedures.
5.1.2 Outsourcing parts and outsourcing parts should comply with the relevant standards and have the manufacturer’s certificate. They can be used only after they pass the factory inspection.
All self-made parts can be assembled after passing inspection.
5.1.3 The welding seam should be uniform, straight and free of defects such as cracks, slag inclusions, pores, undercuts, spatters and weld leaks, and meet the requirements of JB/T 5943.
5.1.4 Connecting parts and fasteners should be reliable and not loose. The tightening torque of threaded fasteners should meet the requirements of QC/T 518.
5.1.5 The surface of all ferrous metal structural parts shall be treated with rust prevention. The exterior decoration of the product should be beautiful and generous, and the paint coating should be firmly attached.
The paint film is smooth and flat, without flow marks, blisters, wrinkles and obvious brush marks.
5.1.6 The hydraulic system pipelines and electronic control system components and circuits should be neatly arranged, firmly clamped, and should not interfere with the moving parts by friction.
5.1.7 The hardness of the paint coating should meet the requirements of GB/T 6739 and not less than 2H pencil hardness; the adhesion of the paint coating should meet the requirements of Class I specified in GB/T 9286.
5.1.8 The rated working voltage of the tailgate should be consistent with the vehicle voltage, generally DC 12V or 24V. The special power supply type or voltage should be specified in the design document.
5.1.9 The tail plate should be able to work normally within the ambient temperature range of -25～45℃. The requirements for other temperatures shall be specified by the manufacturer in the relevant documents.
5.2 Operational requirements
5.2.1 No-load operation requirements
5.2.1.1 In the no-load state of the tail plate, follow the sequence of a)-b)-c)-d)-e)-f)-g) as shown in Figure 1.
(Including manual operation), it should be stable, coordinated, free of interference, jitter, jamming, and no abnormal noise.
5.2.1.2 The no-load ascent speed of the tail plate shall not exceed 150mm/s.
5.2.1.3 The opening/closing speed of the platform should not exceed 10º/s.
5.2.2 Load operation requirements
5.2.2.1 Under the rated load, the tail plate shall run in the order of d)-e)-f)-c)-d) as shown in Figure 1.It shall be stable and coordinated.
Interference, jitter, jamming, and no abnormal noise.
5.2.2.2 The load descent speed of the tail plate under the rated load shall not exceed 150mm/s.
5.2.2.3 Under the rated load, the tilt speed of the tail plate during the two tilting movements shown in Figure 1 d) and e) should not exceed 4º/s.
5.2.3 Position change before and after loading
After the tail plate is tested in accordance with 6.3.8, the parts shall not be damaged, and the change in the position of the load-bearing platform shall not exceed 5mm.
5.2.4 Load standstill change
After the tail plate is tested in accordance with 6.3.9, the lowering of the load-bearing platform shall not exceed 15mm, and the angle change shall not exceed 2°.
5.3 Safety and protection measures and requirements
5.3.1 For the tail plate equipped with the rear lower guard device, after the tail plate is installed, the rear lower guard shall meet the requirements of GB 11567.
5.3.2 When the tailgate is in the closed position, it shall not affect the original vehicle’s lighting and light signal devices, and shall not change the original vehicle’s illumination in accordance with GB 4785.
Technical characteristics of Minghe optical signal device.
5.3.3 The tailboard should take corresponding safety protection measures in accordance with Appendix B to prevent relevant staff from being crushed and injured by shearing.
5.3.4 The tailboard should have a mechanical locking device to prevent automatic falling or automatic opening.
5.3.5 The tail plate should have a mechanical limit device to limit its operation after the end of each operation.
5.3.6 The tailgate control system should have reliable protection measures to ensure that it will not be manipulated by non-workers.
5.3.7 The tailboard should be equipped with an emergency power-off device (main power switch), and should have an overcurrent protection device, which should be as close as possible to the power supply battery.
5.3.8 For tailboards with a maximum lifting height of not less than 2m, rigid guardrails with a height of not less than 1100mm should be installed on the three outer edges of the platform. Guardrail
It should also meet the following requirements.
a) The longitudinal spacing of the guardrails shall not exceed 500mm, and the horizontal spacing shall not exceed 120mm. If the guardrail can be moved or folded,
After moving or folding, the device used to fix the guardrail should remain on the platform or attached to the guardrail.
b) Apply a horizontal thrust of 300N at the most dangerous position of the guardrail, and the displacement should not exceed 30mm. After the thrust is removed, there must be no residual deformation;
5.3.9 The tailboard with a maximum lifting height of not less than 2m should be equipped with a visual or audible warning device. Once the operating platform is lowered, an audible and visual warning can be issued.
5.3.10 In order to prevent the cargo from accidentally slipping off, a stop device with a height of not less than 50mm should be installed on the tailboard used for loading and unloading wheeled cargo or containers.
5.3.11 Obvious indicating devices should be equipped in the cab to enable the driver to clearly confirm whether the tailgate is locked in the correct closed position.
5.3.12 Warning devices such as warning flags and sign boards should be installed on the tailboard. The sign board should meet the requirements of GB 25990.
5.3.13 The hydraulic system should be equipped with leakage protection safety devices. When leakage occurs in the hydraulic circuit, the maximum displacement speed of the tail plate and its components should be
Not more than 150% of normal movement speed. When the safety device is activated, the displacement of any part of the platform should not exceed 100mm.
5.3.14 The vertical movement distance of the platform does not exceed 1.6m and the rated load does not exceed 500kg. When the pipeline fails, the platform is allowed to continue to descend.
The descending speed does not exceed 0.165m/s.
5.3.15 When the tailboard is suspended and driven by ropes, chains, etc., reliable safety devices should be equipped to ensure that the platform's descending distance does not exceed 100mm when the mechanical suspension fails.
5.3.16 When the tailboard is lifted from the ground, the liftable load should not exceed 125% of the rated load.
5.3.17 In order to reduce the risk of over-torque, the center of mass of the rated load should be permanently marked on the platform for tail plates with a depth of more than 1200mm.
5.3.18 Platform
a) The surface of the platform should have reliable anti-skid measures to ensure the normal lifting operation.
b) The area on the platform where the operator stands or walks should not have obstacles that may cause trips. Except for safety devices and components such as safety fences and stop devices.
c) The area on the platform where the operator is not allowed to stand or walk shall be clearly and clearly marked.
d) The outer edge of the platform should be smooth, without sharp edges, sharp corners, burrs, etc. The radius of sharp edges or sharp corners should not be less than 1.5mm.
5.3.19 Hydraulic system
5.3.19.1 The hydraulic system should meet the requirements of GB/T 3766;
5.3.19.2 The adjustment devices of the pressure limiting device, flow regulating valve and load limiting device of the hydraulic system shall be properly protected to avoid random and unauthorized operation.
5.3.19.3 Under the specified operating conditions of the hydraulic system, all pipelines, components, detachable joint surfaces, and movable connections should be well sealed, and there should be no leakage of oil.
5.3.19.4 The hydraulic system of the tail plate shall be able to withstand a pressure of 1.25 times the rated working pressure, and no parts shall be damaged or deformed, and the leakage shall comply with the requirements of 5.3.19.3.
5.3.19.5 The assembly quality of the tail plate hydraulic system shall comply with the provisions of Article 4.5 to 4.8 of GB/T 7935-2005.Cleanliness control should meet the requirements of Article 3.9 of JB/T 6996-2007.
5.3.19.6 The piping in the tail plate hydraulic system shall comply with the provisions of Chapter 6 in JB/T 6996-2007, and the hydraulic hose shall comply with JB/T 8727
According to the regulations, the burst pressure of the hoses and hose joints used in the tail plate should not be less than 4 times the rated working pressure of the system.
5.3.19.7 The hydraulic system of the tail plate shall be equipped with a pressure limiting device. The maximum pressure set by this device is 1.25 times the rated working pressure. this
The device should not respond to the load applied when the platform is in the lifted position.
5.3.19.8 The hydraulic oil used in the tail plate hydraulic system shall comply with the provisions of Chapter 4 of JB/T 6996-2007, and the solid pollution degree of the hydraulic oil shall comply with the
Comply with the regulations of QC/T 29104, and the code for the number of solid pollution particles is 18/15;
5.3.20 Control system
5.3.20.1 The control device should comply with the stop-motion control principle. When the control action stops, the tailboard should stop moving and remain stationary. Simultaneously,
Should have the function of preventing accidental operation.
5.3.20.2 The operating direction of the control device should be logically consistent with the operating result.
5.3.20.3 When a control device is used to control several actions, effective measures should be taken to prevent dangerous action conflicts.
5.3.20.4 For tailboards with more than one control device, the priority order among multiple control devices shall be determined, and effective measures shall be taken to prevent
The risk of command conflicts.
5.3.20.5 The equipment and installation position of the control device should ensure that the operator himself is in a safe working position, and the cargo, platform and weekly
Good observation of the surrounding area. At the same time, it can minimize the risks caused by surrounding traffic (refer to Appendix B, Figures B.1 and B.2).
5.3.20.6 A fixed control device is used to control the opening, closing and folding of the tail plate of the platform. The control device should be two-handed. use
The portable control device controls the opening, closing and folding of the tailboard of the platform, and at least two control devices should be equipped.
5.3.20.7 The relevant characteristics of two-handed operation shall comply with the relevant regulations of Type I in Table 1 of GB/T 19671-2005.Use both hands or feet to enter
The tailgate for line control shall also meet the following requirements.
a) The design of the control device should ensure that it can be operated with both hands or feet, and the specific requirements should comply with Appendix B;
b) Movement only occurs when the control device is fully operated;
c) When any control device is released, the movement will stop immediately.
5.4 Reliability
After the tail plate has been operated for 3000 times without load and 30,000 times with load, there should be no structural damage, permanent deformation, abnormal wear, etc.
(Except for wearing parts), and should still have good operability.
6 Test method
6.1 Appearance
The visual inspection shall meet the requirements of 5.1.3 to 5.1.6.
6.2 Paint coating quality
6.2.1 The paint coating hardness inspection shall be carried out in accordance with the provisions of GB/T 6739, and its value shall comply with the provisions of 5.1.7 of this standard.
6.2.2 The adhesion force of paint coating shall be determined according to the cross-cut method and shall meet the requirements of GB/T 9286.The number of cuts in each direction shall be 6.
The cut spacing is 1mm, and its value should meet the requirements of 5.1.7 of this standard.
6.3 Run test
6.3.1 The operation test is carried out by the manufacturer on the test bench or by the installer after installation. The test bench should have sufficient rigidity and strength,
And a reliable clamping mechanism to ensure that the position of the tail plate is stable during the test, and its fixed part has no obvious movement and sinking, and no permanent deformation.
6.3.2 No-load operation test
The no-load operation test shall be conducted for 5 consecutive times in accordance with the provisions of 5.2.1.1, and shall meet the requirements of 5.2.1.1.After the test, check for external leakage, and it shall meet the requirements of 5.3.19.3.
6.3.3 No-load ascent speed test
In the test specified in 6.3.2, measure the displacement and time elapsed from e) to f) in Figure 1 during the ascent process, calculate the average speed, and take the average value.
Should meet the requirements of 5.2.1.2.
6.3.4 Opening/closing speed
In the test specified in 6.3.2, measure the time of the platform opening/closing process. Calculate the opening/closing angular velocity and take the average value. Response
Meet the requirements of 5.2.1.3.
6.3.5 Load operation test
The load operation test shall be in accordance with the provisions of 5.2.2.1, and shall be tested continuously for 5 times, and shall meet the requirements of 5.2.2.1.After the test, check for external leakage,
Should meet the requirements of 5.3.19.3.
6.3.6 Load drop speed test
In the test specified in 6.3.5, measure the displacement and time elapsed from f) to c) in Figure 1 during the descent process, and calculate the average
Speed, average. Should meet the requirements of 5.2.2.2.
6.3.7 Tilt speed
In the test specified in 6.3.4, measure the inclination angles of downward tilt (d in Figure 1) and upward tilt (e) in Figure 1) and
time. Calculate the angular velocity of the tilt and take the average value. Should meet the requirements of 5.2.2.3.
6.3.8 Position change test before and after loading
The platform is at the 1/2 maximum vertical displacement position, keep it level, and measure the height of the four corners of the platform. Then load 125% to the tailboard
Rated load, after standing for 10 minutes, remove the load from the load-bearing platform, and measure the height of the four corners of the platform again. Platform before and after calculation loading
The change of the four corners is the average value. Should meet the requirements of 5.2.3.
6.3.9 Load static variation test
The platform is located at the highest position of vertical displacement and remains level. Load 125% of the rated load on the tail plate, and measure the height of the four corners...
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