Commercial vehicle fastening point dynamic test device
By designing a dynamic test device for fixed points for commercial vehicles and using multi-layer load-bearing layers and tensioning devices, the problem of difficult to effectively assess the strength of fixed points and cargo container floors in the existing technology is solved, and a comprehensive assessment and safety assessment of the strength of fixed points, connecting devices and cargo container floors is achieved.
Patent Information
- Application Number
- CN202421819971.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-07-30
AI Technical Summary
The prior art lacks effective dynamic testing methods when assessing the strength of commercial vehicle system fixtures, connection devices and cargo container floors, resulting in obvious movement and floor damage during full braking, and the sandbag simulated cargo load quality is not enough to assess the ultimate strength.
A dynamic test device for commercial vehicle series fixed point is designed, including fixtures composed of four rectangular columns and multi-layer load-bearing layers. The fixed point is connected by a tensioning device, and cargo is placed on the load-bearing layer to adjust the center of mass and axle load distribution, thereby enhancing the strength assessment of the fixed point and cargo box floor.
This device can effectively verify the strength of the fixed point, connecting device and cargo box floor, measure the strength safety factor of the fixed point and connecting device, reduce test risks, and improve the accuracy and safety of the assessment.
Smart Images
Figure CN222784341U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field related to automobile parts detection, in particular to a dynamic test device for fixing points of commercial vehicles. Background Art
[0002] For cargo safety, ISO 27956, GB / T 43405, EN 12640, and JT / T 1178.1 proposed static strength test methods for truck tie-down points on vehicles, which mainly assess the strength of the tie-down points.
[0003] After the vehicle is loaded with cargo, when braking at a high speed, driving on a curve, or braking on a curve, the inertial movement of the cargo may affect the operation of the vehicle, resulting in a safety accident. For this reason, a dynamic test method for the fastening points is conducted. The dynamic test method tests the fastening points and connection devices. In addition, the test results show that during full braking, the cargo clamps move significantly and the floor is significantly damaged. In current road tests, sandbags are generally used to simulate the load mass, and the ultimate strength of the fastening points, connection devices, and floor has not been assessed. Utility Model Content
[0004] The utility model aims to provide a dynamic test device for fastening points of commercial vehicles, which can verify the strength of fastening points, connecting devices and cargo box floors, and measure the strength safety factor of fastening points and connecting devices.
[0005] To this end, the technical solution adopted by the utility model is: a dynamic test device for commercial vehicle tie-down points, including a fixture composed of four columns arranged in a rectangular shape and a multi-layer load-bearing layer arranged on the columns, a pallet is arranged at the lower end of each column, the pallet is arranged on the cargo box floor, the upper part of the column is connected to the tie-down point through a tensioning device, the tensioning device includes a tensioner and a tension measuring device, the tie-down point, the tension measuring device and the tensioner are connected in sequence through a connecting rope, the free end of the connecting rope is connected to the upper part of the column, when the goods are placed on the load-bearing layer, the height of the center of mass of the clamp and the goods is higher than half of the height of the clamp.
[0006] More preferably, a rubber pad is provided under the pallet. Providing a rubber pad under the pallet facilitates strengthening the test and assessment of the strength of the cargo box floor.
[0007] More preferably, the tray includes a base and a rectangular fixing tube disposed on the base for fixing the column, wherein the fixing tube is provided with threaded holes in both the horizontal and vertical directions. By providing the threaded holes in the horizontal and vertical directions of the fixing tube, it is convenient to fix the column in the fixing tube by bolts.
[0008] Further preferably, the tray fixes the column in the fixing tube by fastening bolts and fastening nuts.
[0009] More preferably, two triangular plate connecting ribs are arranged on the outer sides of the four side walls of the fixing tube to increase the strength of the fixing tube and ensure that after the column is installed in the fixing tube, the fixing tube will not be deformed during the test to affect the test process.
[0010] More preferably, the connection between the load-bearing layer and the column is provided with diagonal reinforcement ribs to increase the strength of the load-bearing layer and prevent the load-bearing layer from being deformed due to the weight of the goods.
[0011] More preferably, a steel plate with a thickness of 2 mm is welded on the load-bearing layer. The steel plate is welded on the load-bearing layer to increase the strength of the load-bearing layer.
[0012] Further preferably, a speed meter, a longitudinal acceleration meter, a lateral acceleration meter, and a roll angle meter are provided at the center of mass of the vehicle.
[0013] Further preferably, the load-bearing layer is composed of four rectangular steel pipes, and the rectangular steel pipes are connected between four columns to form a rectangle.
[0014] The beneficial effects of the utility model are as follows: a plurality of load-bearing layers are arranged, and by placing goods of different masses on different load-bearing layers, the position of the vehicle's center of mass and the distribution of axle loads are adjusted, so as to facilitate testing of the vehicle's fastening points at different centers of mass, and the height of the center of mass of the goods is higher than one-half of the height of the clamp, so that the strength assessment of the tightening device of the fastening point and the cargo box floor can be enhanced, and the test risk (vehicle speed, braking strength) can be reduced to achieve the purpose of fastening point assessment, and the strength and life of the vehicle's fastening points and connecting devices, and the cargo box floor, as well as driving safety can also be assessed. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 .
[0016] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 .
[0017] Figure 3 It is a front view of the tray in the utility model.
[0018] Figure 4 It is a top view of the tray in the utility model.
[0019] Figure 5 It is a schematic diagram of the installation position of the clamp in the utility model. DETAILED DESCRIPTION
[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0021] like Figure 1-5 As shown, a dynamic test device for fixing points of commercial vehicles includes a fixture composed of four columns 1 arranged in a rectangular shape and a multi-layer load-bearing layer 2 arranged on the columns 1, and the connection between the load-bearing layer 2 and the column 1 is provided with a diagonal reinforcement rib 9. Increase the strength of the load-bearing layer 2 to prevent the load-bearing layer 2 from being deformed due to the weight of the goods. A steel plate 201 with a thickness of 2 mm is welded on the load-bearing layer 2. The steel plate 201 is welded on the load-bearing layer 2 to increase the strength of the load-bearing layer 2. The load-bearing layer 2 is composed of four rectangular steel pipes, and the rectangular steel pipes are connected between the four columns 1 to form a rectangle. In the length direction of the fixture, a reinforcement pipe is horizontally arranged in the middle position of the rectangular steel pipe, and a tray 3 is arranged at the lower end of each column 1, and a rubber pad 8 is arranged under the tray 3. The rubber pad 8 is arranged under the tray 3 to facilitate the test and assessment of the strength of the cargo box floor.
[0022] The tray 3 includes a base 301 and a rectangular fixing tube 302 disposed on the base 301 for fixing the column 1. The fixing tube is provided with threaded holes 303 in the transverse and longitudinal directions. The threaded holes 303 are provided in the transverse and longitudinal directions of the fixing tube, so that the column 1 can be fixed in the fixing tube by bolts. The tray 3 fixes the column 1 in the fixing tube by fastening bolts 304 and fastening nuts 305.
[0023] The four side walls of the fixing tube are each provided with two triangular plate connecting ribs 306. The strength of the fixing tube is increased to ensure that after the column 1 is installed in the fixing tube, the fixing tube will not be deformed during the test, thereby affecting the test process.
[0024] The pallet 3 is set on the cargo box floor, and the upper part of the column 1 is connected to the fastening point 4 by a tensioning device. The tensioning device includes a tensioner 5 and a tension measuring device 6. The fastening point 4, the tension measuring device 6 and the tensioner 5 are connected in sequence by a connecting rope 7. The free end of the connecting rope 7 is connected to the upper part of the column 1. When the goods are placed on the load-bearing layer 2, the height of the center of mass of the clamp and the goods is higher than half of the height of the clamp.
[0025] A velocity meter, a longitudinal acceleration meter, a lateral acceleration meter, and a roll angle meter are arranged at the center of mass of the vehicle.
[0026] A plurality of load-bearing layers 2 are provided, and cargoes of different masses are placed on different load-bearing layers 2, so as to adjust the position of the vehicle's center of mass and the distribution of the axle load, so as to facilitate testing of the vehicle's fastening points 4 at different centers of mass. In addition, the height of the cargo's center of mass is higher than half of the height of the clamp, so as to enhance the assessment of the strength of the tensioning device of the fastening point 4 and the cargo box floor, and reduce the test risk (vehicle speed, braking strength) to achieve the purpose of the fastening point 4 assessment. The strength, lifespan and driving safety of the vehicle's fastening points 4 and the connecting devices and the cargo box floor (rubber pads 8 are not required) can also be assessed.
[0027] In this embodiment, the length of the clamp is 800mm and the width is 600mm, that is, the distance between the four columns 1 arranged in a rectangular arrangement, and the distance between the clamp and the top of the car body in the vertical direction is H1 not less than 100mm; three load-bearing layers 2 are arranged on the clamp, among which the middle load-bearing layer is on the center line in the height direction of the car body, and the distance between the top load-bearing layer and the bottom load-bearing layer and the middle load-bearing layer is H2. The specific data of H2 is changed and adjusted according to the height of the vehicle car body, as shown in Table 1. The column 1 is connected to the fastening point 4 by a connecting rope 7, and the position where the connecting rope 7 is connected to the column is 200mm upward from the horizontal center line of the middle load-bearing layer; the column 1 adopts a 60mm×60mm rectangular steel pipe with a wall thickness of 5mm, and the load-bearing layer 2 is composed of four rectangular steel pipes, and the size of the rectangular steel pipe and the reinforcement pipe are 50mm×50mm, and the wall thickness is 5mm.
[0028]
[0029] Table 1
[0030] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. A dynamic test device for tie points of commercial vehicles, characterized in that: The invention comprises a clamp composed of four columns (1) arranged in a rectangular shape and a multi-layer load-bearing layer (2) arranged on the columns (1); a tray (3) is arranged at the lower end of each column (1); the tray (3) is arranged on the cargo box floor; the upper part of the column (1) is connected to a fastening point (4) by a tensioning device; the tensioning device comprises a tensioner (5) and a tension measuring device (6); the fastening point (4), the tension measuring device (6) and the tensioner (5) are connected in sequence by a connecting rope (7); the free end of the connecting rope (7) is connected to the upper part of the column (1); when goods are placed on the load-bearing layer (2), the height of the center of mass of the clamp and the goods is higher than half of the height of the clamp.
2. A commercial vehicle tie-down point dynamic test device according to claim 1, characterized in that: A rubber pad (8) is provided below the tray (3).
3. A commercial vehicle tie-down point dynamic test device according to claim 1, characterized in that: The tray (3) comprises a base (301) and a rectangular fixing tube (302) arranged on the base (301) for fixing the column (1), wherein the fixing tube is provided with threaded holes (303) in both the transverse and longitudinal directions.
4. A commercial vehicle tie-down point dynamic test device according to claim 3, characterized in that: The tray (3) fixes the column (1) in the fixing tube by means of a fastening bolt (304) and a fastening nut (305).
5. A commercial vehicle tie-down point dynamic test device according to claim 4, characterized in that: Two triangular plate connecting ribs (306) are arranged on the outer sides of the four side walls of the fixing tube.
6. A commercial vehicle tie-down point dynamic test device according to claim 1, characterized in that: The connection between the load-bearing layer (2) and the column (1) is provided with diagonal reinforcement ribs (9).
7. A commercial vehicle tie-down point dynamic test device according to claim 6, characterized in that: The load-bearing layer (2) is welded with a steel plate (201) with a thickness of 2 mm.
8. A commercial vehicle tie-down point dynamic test device according to claim 1, characterized in that: A velocity meter, a longitudinal acceleration meter, a lateral acceleration meter, and a roll angle meter are arranged at the mass center of the fixture and the cargo.
9. A commercial vehicle tie-down point dynamic test device according to claim 1, characterized in that: The load-bearing layer (2) is composed of four rectangular steel pipes, and the rectangular steel pipes are connected between four columns (1) to form a rectangle.