Tire arresting mechanism for commercial vehicle protection device test

Abstract

The utility model discloses a tire arresting mechanism for testing a commercial vehicle protection device. The tire arresting mechanism comprises a fixed seat mounted on an equipment foundation, a tensioning mechanism mounted on the fixed seat and two iron chains connected with a movable part of the tensioning mechanism, the device further comprises a tire stop block assembly used for stopping the wheel, the tire stop block assembly comprises a tire stop block, the tire stop block is provided with cambered surfaces with different radiuses, the cambered surfaces are used as acting surfaces in attached contact with the wheel tire of the tested vehicle, connecting holes are formed in the left side and the right side of the tire stop block respectively, and the iron chain penetrates through the tire stop block through the connecting holes. The chain is fixed by a chain locking plate; and rollers convenient to move are further mounted at the bottoms of the tire stop blocks. According to the utility model, the iron chain can be pre-tightened quickly, and the tire stop dogs are prevented from toppling over due to increased load in the test process, so that the test is ensured to be carried out smoothly.

Description

Technical Field

[0001] The utility model belongs to the field of vehicle testing equipment, and in particular relates to a tire arresting mechanism for testing a protective device of an operating vehicle. Background Art

[0002] According to regulatory requirements, operating vehicles must undergo loading tests on protective devices. To perform loading tests, the vehicle must be fixed to prevent it from moving forward and backward during loading. The traditional vehicle fixing scheme is basically as follows: a chain is used in conjunction with a chain adjuster to be wrapped around and fixed on the rear axle of the operating vehicle. Although this method can achieve the initial fixation of the vehicle, during the test, the paint surface of the rear axle is easily damaged after the chain is tightened. The vehicle needs to be repainted after the test is completed. On the other hand, the chain and the chain adjuster cannot achieve complete fixation, and a small amount of gap will still remain after the fixation is completed. Another method is to use a hand-operated hoist in conjunction with the tire block assembly, place the triangular tire block assembly on the front side of the tire, and the hooks of the hand-operated hoist are fixed on both sides of the block, and the locking is achieved by manually stirring the handle of the hand-operated hoist. Although this method solves the problem of damaging the paint surface of the rear axle and being unable to fully preload, the blocks used in this solution are mostly triangular blocks, which are heavy and difficult for one person to move. In the process of preloading, four lever hoists need to be pulled one by one, which is labor-intensive and inefficient. In addition, such blocks are generally right-angled triangular blocks, and the wheel contacts the inclined surface of the block. During the test, as the load force on the protective device increases, the block is very likely to topple under the tire, affecting the test results and accuracy. Therefore, it is particularly critical to design and develop a tire block assembly that is easy to move, can be quickly preloaded, and will not topple over due to increased load during the test. Utility Model Content

[0003] The utility model aims to provide a tire blocking mechanism for testing a protective device of an operating vehicle, which can quickly pre-tighten a chain and prevent the tire block from tipping over due to increased load during the test, thereby ensuring the smooth conduct of the test.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a tire blocking mechanism for testing operating vehicle protection devices, including a fixed seat installed on the equipment base, a tensioning mechanism installed on the fixed seat and two chains connected to the movable part of the tensioning mechanism; it also includes a tire block assembly for blocking the wheel, the tire block assembly includes a tire block, and the tire block is provided with arc surfaces of different radii as the working surfaces for fitting and contacting with the wheel tire of the test vehicle. Connecting holes are respectively provided on the left and right sides of the tire block, and the chain passes through the tire block through the connecting hole and is fixed by a chain locking plate; a roller for easy movement is also installed at the bottom of the tire block.

[0005] The beneficial effects are as follows: the tire block assembly adopted by the utility model is in contact with the wheel tire surface through the arc-shaped action surface. When the test vehicle is subjected to a large load on the loading test bench, the wheel can better fit the action surface to prevent the tire block from tipping over; and the action surface has different radii and can be matched with wheels of different sizes to meet the test requirements of mainstream commercial vehicles on the market.

[0006] The movable part of the tensioning mechanism is connected with a shackle, and two butterfly buckles are connected to the shackle, and each butterfly buckle is connected to the chain through a chain lock hook.

[0007] The beneficial effect is that the two chains can be tensioned by the tensioning mechanism at the same time, the tensioning force on the two chains can be balanced, and the tire block is prevented from being deflected to the left or right during the test and failing.

[0008] The shackle is rotatably connected to the movable part of the tensioning mechanism, and the rotation axis is parallel to the supporting surface of the equipment foundation.

[0009] The tensioning mechanism is a worm gear screw mechanism, a hydraulic cylinder, a pneumatic cylinder or an electric push rod.

[0010] The beneficial effect is that a variety of structural forms of the tensioning mechanism are proposed, and users can choose according to actual conditions, thereby expanding the application scope of the utility model.

[0011] A pre-embedded base is embedded in the equipment foundation, and the fixing seat is connected to the pre-embedded base.

[0012] The beneficial effect is that the fixing seat on the equipment foundation is more reliable.

[0013] The embedded base and the fixing seat are slidably connected through the cooperation of the T-shaped head and the T-shaped slot, and the sliding direction is the width direction of the tested vehicle.

[0014] The beneficial effect is that two sets of tire arresting mechanisms are generally required during vehicle testing, and the fixing seat of each set of tire arresting mechanisms can slide left and right on the embedded base, and the spacing between the two sets of tire arresting mechanisms can be adjusted to adapt to vehicles with different wheelbases.

[0015] The effective surfaces with different radii on the tire stopper assembly are distributed on the front and rear surfaces of the tire stopper.

[0016] The beneficial effect is that the two types of active surfaces are distributed on the front and rear surfaces of the tire stopper, which can reduce the length of the tire stopper on the one hand, and on the other hand, can distribute active surfaces with larger areas on the same side.

[0017] The active surfaces with different radii on the tire stopper assembly are distributed on the same side of the tire stopper.

[0018] The beneficial effect is that the two action surfaces are distributed on the same side, which can avoid the need to select the installation direction of the tire block during the test, and the operation is simpler.

[0019] The chain lock plate is a U-shaped groove structure plate.

[0020] The beneficial effect is that the chain can be simply and effectively fixed by utilizing the U-shaped structure.

[0021] The beneficial effects of the utility model are: the utility model can quickly and easily complete the fixing of the test vehicle, is simple to operate, labor-saving, and efficient, especially for operating vehicles with limited bottom space, it can greatly reduce the difficulty of fastening and save test preparation time. The tire block in the tire block assembly used is set with an arc surface, which can better fit the vehicle tire, effectively prevent the block from overturning and drilling under the tire, thereby ensuring the smooth progress of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a schematic diagram of the state of the utility model being applied in a vehicle test;

[0024] Figure 2 for Figure 1 A local enlarged view of point A in FIG.

[0025] Figure 3 for Figure 1 A top view of

[0026] Figure 4 is a structural schematic diagram of a tire stopper assembly;

[0027] Figure 5 is a side view schematic diagram of the tire block assembly;

[0028] Markings in the figure: 1. chain, 2. chain lock plate, 3. tire block assembly, 4. butterfly buckle, 5. shackle, 6. worm gear screw mechanism, 7. worm gear screw mechanism adapter, 8. fixed seat, 9. embedded base, 10. loading test bench, 11. equipment foundation, 12. wheel, 13. chain lock hook;

[0029] 301. tire block, 302. roller, 303. wheel axle, 304. action surface, 305. connecting hole. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention in any way.

[0031] like Figure 1 As shown, a tire blocking mechanism for testing a protective device of an operating vehicle includes a chain 1, a tire block assembly 3, a worm gear screw mechanism 6 and a fixing seat 8.

[0032] The fixing seat 8 is connected to the embedded base 9 on the equipment foundation 11, and the worm screw mechanism 6 is fixed to the fixing seat 8 by bolts. The embedded base 9 is a cast iron plate, which is fixed to the equipment foundation 11 by secondary casting. A T-shaped slot is provided on the embedded base 9, and the length direction of the T-shaped slot is the width direction of the vehicle. The fixing seat 8 is provided with a T-shaped head corresponding to the T-shaped slot, and the T-shaped head and the T-shaped slot form a sliding pair, so that the fixing seat 8 can slide left and right on the embedded base 9 to meet the fastening needs of vehicles with different wheelbases.

[0033] As an alternative, a T-shaped slot may be provided on the fixing seat 8 and a T-shaped head may be provided on the embedded base 9, so that the fixing seat 8 can also slide left and right.

[0034] After the worm gear screw mechanism 6 is installed on the fixed seat 8, its screw can move forward and backward under the drive of the worm gear, so as to tighten or loosen the connected chain 1. The worm gear screw mechanism 6 is provided with a worm gear screw mechanism adapter 7, which serves as the power input end of the worm gear screw mechanism 6 and is used to connect with the power mechanism. Specifically, the worm gear screw mechanism adapter 7 is an external hexagonal, and the electric wrench is mounted on the external hexagonal to realize electric drive.

[0035] In this embodiment, a worm gear screw lift is used as the worm gear screw mechanism 6, and the worm gear screw lift is placed horizontally, and its housing is connected to the fixing seat 8 by bolts. In other embodiments, other mechanisms capable of realizing a linear telescopic function can be used instead of the worm gear screw mechanism 6 as the tensioning mechanism of the chain, such as a hydraulic cylinder, an electric push rod or a pneumatic cylinder.

[0036] like Figure 2 , 3 As shown, each set of tire blocking mechanism has two butterfly buckles 4 and two chains 1. When in use, the two chains 1 are located on the left and right sides of the wheel to be fixed. The rear ends of the two butterfly buckles 4 are connected to the same shackle 5, and the shackle 5 is connected to the front circular hole of the screw of the worm screw mechanism 6. The front end of each butterfly buckle 4 is connected to a chain lock hook 13, and the chain lock hook 13 is connected to one of the chains 1. The chain 1 passes through the tire block assembly 3 and is initially fixed by the chain lock plate 2.

[0037] The structure of the tire block assembly 3 is as follows: Figure 4As shown, it includes a tire block 301 and a roller 302 installed at the bottom of the tire block 301. The roller 302 adopts a deep groove ball bearing and is installed on the wheel shaft 303 at the bottom of the tire block 301. The shaft is axially limited by a retaining spring to prevent it from falling off. Figure 5 As shown, the front and rear side surfaces of the tire block 301 are respectively arranged as arc surfaces with different radii, which serve as the action surface 304 in contact with the rolling surface of the wheel tire. The arrangement of the two arc surfaces, on the one hand, matches the tire diameter of the current mainstream operating vehicles and meets the test requirements of different vehicles. On the other hand, it can also ensure that the tire and the action surface of the tire block 301 fit more effectively, thereby avoiding the tire block from tipping over during the loading test and ensuring the smooth progress of the test.

[0038] Connecting holes 305 of different heights are respectively arranged on the left and right sides of the tire stopper action surface 304, and the connecting holes are cross holes to facilitate the passing of the chain 1. The chain lock plate is a U-shaped groove structure plate, and after the chain 1 passes through the connecting holes 305, the chain lock plate is inserted on the chain 1, thereby providing a fixing point for the chain 1 during the tensioning process.

[0039] In other embodiments, the two radius action surfaces may be arranged on the same surface of the tire block, which can also play the role of fitting with the wheels and tires of different test vehicles.

[0040] When using the tire arresting mechanism of the utility model, two sets of tire arresting mechanisms are generally used. First, the positions of the fixing seats 8 in the two sets of tire arresting mechanisms are adjusted according to the wheelbase of the test vehicle. Then, one end of the chain 1 is passed through the connecting hole 305 on the tire block 301, and the chain 1 is preliminarily fixed by the chain locking plate 2. Then, the tire block assembly 3 and the connected chain 1 are pushed in front of the tire of the test vehicle, and the active surface 304 of the tire block 301 is in contact with the vehicle tire; the other end of the chain 1 is connected to the shackle 5 on the worm gear screw mechanism 6 on the fixing seat 8 through the chain locking hook 13 and the butterfly buckle 4; finally, the worm gear screw mechanism adapter 7 is clamped with an electric wrench, and the worm gear screw mechanism adapter 7 is rotated to drive the screw of the worm gear screw mechanism 6 to retract backwards, tighten the chain 1, and complete the overall fastening of the test vehicle after completing the tensioning of the two chains 1 respectively.

[0041] When the chain 1 is connected to the tire stopper 301, it is necessary to select a matching action surface 304 on the tire stopper 301 according to the tire size of the tested vehicle, so that the action surface 304 can contact the wheel tire after the tire stopper assembly 4 is pushed under the vehicle.

[0042] When testing the protective devices of a vehicle, if Figure 1 , 2As shown, the loading test bench 10 of the equipment base 11 applies a loading force to the vehicle protection device, and the tire block assembly 3 blocks the wheel 12 of the test vehicle to prevent the test vehicle from moving forward, thereby ensuring the progress of the test.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can be modified or replaced by equivalents with reference to the above embodiments. Any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention are within the scope of protection of the pending claims.

Claims

1. A tire arresting mechanism for testing a protective device of an operating vehicle, comprising a fixing seat mounted on a device foundation, a tensioning mechanism mounted on the fixing seat, and two chains connected to a movable part of the tensioning mechanism, characterized in that: It also includes a tire stopper assembly for blocking the wheel, the tire stopper assembly includes a tire stopper, the tire stopper is provided with arc surfaces of different radii as the working surfaces for fitting and contacting with the wheel tire of the test vehicle, the left and right sides of the tire stopper are respectively provided with connecting holes, the chain passes through the tire stopper through the connecting holes and is fixed by a chain locking plate; a roller for easy movement is also installed at the bottom of the tire stopper.

2. A tire arresting mechanism for testing a commercial vehicle protection device according to claim 1, characterized in that: The movable part of the tensioning mechanism is connected with a shackle, and two butterfly buckles are connected to the shackle, and each butterfly buckle is connected to the chain through a chain lock hook.

3. A tire arresting mechanism for testing a commercial vehicle protection device according to claim 2, characterized in that: The shackle is rotatably connected to the movable part of the tensioning mechanism, and the rotation axis is parallel to the supporting surface of the equipment foundation.

4. A tire arresting mechanism for testing a commercial vehicle protection device according to claim 1 or 2, characterized in that: The tensioning mechanism is a worm gear screw mechanism, a hydraulic cylinder, a pneumatic cylinder or an electric push rod.

5. The tire arresting mechanism for testing a protective device for an operating vehicle according to claim 1, characterized in that: A pre-embedded base is embedded in the equipment foundation, and the fixing seat is connected to the pre-embedded base.

6. A tire arresting mechanism for testing a commercial vehicle protection device according to claim 5, characterized in that: The embedded base and the fixing seat are slidably connected through the cooperation of the T-shaped head and the T-shaped slot, and the sliding direction is the width direction of the tested vehicle.

7. The tire arresting mechanism for testing a commercial vehicle protection device according to claim 1, characterized in that: The effective surfaces with different radii on the tire stopper assembly are distributed on the front and rear surfaces of the tire stopper.

8. The tire arresting mechanism for testing a protective device for an operating vehicle according to claim 1, characterized in that: The active surfaces with different radii on the tire stopper assembly are distributed on the same side of the tire stopper.

9. The tire arresting mechanism for testing a protective device for commercial vehicles according to claim 1, characterized in that: The chain lock plate is a U-shaped groove structure plate.

Images