Universal trailer lever switching clamp

Abstract

The utility model belongs to the technical field of tow bars, and particularly relates to a universal tow bar switching clamp which comprises a height adjusting plate and a clamping plate, one side of the height adjusting plate is connected with the clamping plate, and the other side of the height adjusting plate is connected with an output shaft of a hydraulic cylinder. Mounting holes are formed in the ends, away from the height adjusting plates, of the clamping plates, the mounting holes comprise long-strip-shaped holes formed in the length directions of the clamping plates and circular holes penetrating through the upper end faces and the lower end faces of the clamping plates, and the long-strip-shaped holes communicate with the circular holes; and the hook body of the tow bar slides into the mounting hole in the clamping plate to realize switching. Through the arrangement of the height adjusting plate and the clamping plate, the trailer levers of different models can be switched over, the universal design of the clamp is met, and the cost and the period of products are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of trailer tow bars, and particularly relates to a universal trailer tow bar adapter fixture. Background Art

[0002] The statements in this part only provide background technical information related to the utility model, and do not necessarily constitute prior art.

[0003] The trailer tow bar is an important component for connecting a caravan and a vehicle. It is a towing device connected to the longitudinal beam or bumper beam of the vehicle body. Usually, it can tow a trailer weighing about 1700 KG, a towed caravan, or install some after-market luggage racks, bicycle racks and other equipment. Most SUVs, pickups and other vehicles are used to tow equipment such as towed caravans and yachts.

[0004] The structural durability performance of the trailer tow bar is crucial. If the strength of the trailer tow bar does not meet the requirements, large-area cracking of the vehicle body will occur, affecting safety performance. Therefore, there will be many component and system-level bench tests during the development of the trailer tow bar; among them, the bench test of components is a key assessment requirement. During the test process, the trailer ball device is fixed on the test bench, the hydraulic cylinder is fixed on the tow bar ball head through a conversion fixture, the hydraulic cylinder device generates a load through hydraulic drive, and the load is transmitted to the trailer tow bar through the fixture to carry out relevant tests.

[0005] During the bench test process, due to the special form of the trailer tow bar, the loading point heights of trailer tow bars of different vehicle models are also different, and generally there are various vehicle model developments, and multiple sets of fixtures are often designed to meet the development requirements; if the generalization of the fixture is not considered, it will lead to a large design cost and development cycle. Summary of the Utility Model

[0006] To overcome the deficiencies of the above-mentioned prior art, the utility model provides a universal trailer tow bar adapter fixture.

[0007] To achieve the above object, one or more embodiments of the utility model provide the following technical solutions:

[0008] The first aspect of the utility model provides a universal trailer tow bar adapter fixture, which includes a height adjustment plate and a clamping plate. One side of the height adjustment plate is connected to the clamping plate, and the other side is connected to the output shaft of the hydraulic cylinder;

[0009] An installation hole is opened at one end of the clamping plate away from the height adjustment plate. The installation hole includes a long hole opened along the length direction of the clamping plate and a circular hole penetrating the upper and lower end faces of the clamping plate. The long hole is communicated with the circular hole; the hook body of the trailer tow bar is transferred by sliding into the installation hole on the clamping plate.

[0010] Further, an inclined support plate is provided between the clamping plate and the height adjustment plate.

[0011] Furthermore, a towing ball is provided at the upper end of the hook body of the towing bar. The size of the circular hole is smaller than that of the towing ball, and the towing ball is located above the circular hole.

[0012] Furthermore, the height adjustment plate includes a first fixed plate and a second fixed plate; one side of the first fixed plate is connected to the clamping plate, the other side of the first fixed plate is connected to the second fixed plate through a position adjustment component, and the other side of the second fixed plate is connected to the output shaft of the hydraulic cylinder.

[0013] Furthermore, the position adjustment component includes bolt holes and fixing bolts respectively arranged at corresponding positions of the first fixed plate and the second fixed plate. The height of the first fixed plate is adjusted by the cooperation of the bolt holes and the fixing bolts.

[0014] Furthermore, two groups of bolt holes are respectively formed on the first fixed plate and the second fixed plate, and the two groups of bolt holes are respectively located on both sides of the fixed plate.

[0015] Furthermore, the size of the second fixed plate is larger than that of the first fixed plate.

[0016] Furthermore, the output shaft of the hydraulic cylinder is connected to the height adjustment plate through bolts.

[0017] Furthermore, a plurality of limiting holes are provided on the clamping plate, and the hook body of the towing bar is limited by inserting a limiting rod into the limiting holes.

[0018] Furthermore, the limiting holes penetrate through both side surfaces of the clamping plate.

[0019] The above one or more technical solutions have the following beneficial effects:

[0020] (1) By setting the height adjustment plate and the clamping plate, the present utility model realizes the transfer of towing bars of different models, meets the general design of the fixture, and reduces the cost and cycle of the product.

[0021] (2) The fixture provided by the present utility model is used to connect the towing bar and the hydraulic cylinder, can support the towing bars of different heights to carry out relevant bench tests, and has a simple structure, which can save the development cost and shorten the development cycle.

[0022] The advantages of the additional aspects of the present utility model will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present utility model. Description of the Drawings

[0023] The attached drawings forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0024] Figure 1 It is a schematic diagram of the use of a general trailer hitch adapter fixture for Embodiment 1.

[0025] Figure 2 It is a side view of the use of a general trailer hitch adapter fixture for Embodiment 1.

[0026] Figure 3 It is a schematic diagram of the relevant structure of the first fixing plate for Embodiment 1.

[0027] Figure 4 It is a schematic diagram of the structure of the second fixing plate for Embodiment 1.

[0028] Figure 5 It is a schematic diagram of the trailer hitch structure for Embodiment 1.

[0029] In the figure, 1 is the height adjustment plate, 101 is the first fixing plate, 102 is the second fixing plate, 2 is the clamping plate, 201 is the circular hole, 202 is the long hole, 203 is the limiting rod, 3 is the trailer hitch, 301 is the hook body, 302 is the ball head, 303 is the vehicle body connection component, 304 is the cross bar, 4 is the output shaft of the hydraulic cylinder, and 5 is the inclined support plate. Detailed implementation manners

[0030] The present utility model will be further described below in conjunction with the attached drawings and embodiments.

[0031] Embodiment 1

[0032] As Figure 1 、 Figure 2 shown, the present utility model provides a general trailer hitch adapter fixture, which includes a height adjustment plate 1 and a clamping plate 2. One side of the height adjustment plate 1 is connected to the clamping plate 2, and the other side is connected to the output shaft 4 of the hydraulic cylinder;

[0033] An installation hole is provided at one end of the clamping plate 2 away from the height adjustment plate. The installation hole includes a long hole 202 opened along the length direction of the clamping plate and a circular hole 201 penetrating the upper and lower end faces of the clamping plate. One end of the long hole 202 extends to the end of the clamping plate 2, and the long hole 202 communicates with the circular hole 201; the hook body of the trailer hitch is transferred by sliding into the installation hole on the clamping plate.

[0034] In this embodiment, considering the special form of the trailer hitch, matching different vehicle models will result in a large difference in the height of the ball head. Often, multiple sets of fixtures are designed to meet the development requirements. Therefore, by setting the height adjustment plate and the clamping plate, different models of trailer hitches can be transferred, meeting the generalization design of the fixture and reducing the cost and cycle of the product.

[0035] As a further technical solution, Figure 3 , Figure 4 As shown, a plurality of limiting holes are also provided on the clamping plate 2, and the limiting holes are arranged on both sides of the circular hole 201, and the limiting holes penetrate the two side surfaces of the clamping plate 2;

[0036] After the hook body 301 of the trailer bar 3 slides into the elongated hole 202 or the circular hole 201 on the clamping plate 2, the position of the trailer bar hook body after the transfer is realized by inserting the limit rod 203 into the limit hole. The limit hole and the limit rod can be matched with a threaded structure or a smooth structure, which will not be repeated here.

[0037] As a further technical solution, Figure 5 As shown, the trailer bar 3 includes a cross bar 304 , both ends of which are provided with vehicle body connection components 303 , the middle of the cross bar 304 is connected to the hook body 301 through a connecting plate, and the end of the hook body 301 is provided with a ball head 302 .

[0038] In this embodiment, a trailer ball 302 is provided at the upper end of the hook body 301 of the trailer bar 3, the size of the circular hole 201 is smaller than the size of the trailer ball 302, and the width of the elongated hole 202 is greater than the width of the hook body 301 to ensure that the hook body 301 can slide in the elongated hole 202.

[0039] As a further technical solution, the height adjustment plate 1 includes a first fixing plate 101 and a second fixing plate 102, and the size of the second fixing plate 102 is larger than the size of the first fixing plate 101;

[0040] One side of the first fixed plate 101 is connected to the clamping plate 2, and the other side of the first fixed plate 101 is connected to the second fixed plate 102 through a position adjustment component. The other side of the second fixed plate 102 is connected to the hydraulic cylinder output shaft 4, and the hydraulic cylinder output shaft 4 is connected to the height adjustment plate by bolts.

[0041] In this embodiment, a position adjustment component is provided between the first fixing plate 101 and the second fixing plate 102. By providing the position adjustment component, the vertical height of the first fixing plate can be adjusted to achieve the universal purpose of the clamp.

[0042] The position adjustment assembly includes bolt holes and fixing bolts respectively arranged at corresponding positions of the first fixing plate 101 and the second fixing plate 102; the height of the first fixing plate 101 is adjusted by the cooperation of the bolt holes and the fixing bolts.

[0043] Two groups of bolt holes 103 are respectively formed on the first fixing plate 101 and the second fixing plate 102 . The two groups of bolt holes 103 are respectively located on two sides of the fixing plates.

[0044] It should be noted that the method for adjusting the height of the height adjustment plate up and down in this embodiment is not limited to the form of mounting holes, and sliding structures, worm gears or other structures can also be used. For example: The position adjustment component using a sliding structure includes a slide rail provided on the first fixed plate and a slide groove opened on the second fixed plate, and the height of the first fixed plate is adjusted through the cooperation of the slide rail and the slide groove.

[0045] As a further technical solution, the height adjustment plate 1 is a steel plate, and an inclined support plate 5 is provided between the clamping plate 2 and the height adjustment plate 1. The inclined support plate 5 is used to reinforce the structural stiffness and stability.

[0046] The working principle of the present utility model is as follows: In the assembly process of the entire system, first, the trailer hitch structure is fixed on the test bench, and the fixed point is the connection point between the trailer hitch and the vehicle body, which is fixed and tightened by bolts; then the clamping plate is placed at the position of the trailer ball and fixed by the limit rod (tightening bolt); then the height of the fixture body is adjusted up and down, that is, the fixing holes are aligned, and the mounting bolts are inserted into the holes and fixed to achieve the adjustment of the height of the adjustment plate; finally, the output shaft of the hydraulic cylinder is fixedly connected to the fixture by bolts. After all the bolts are re-tightened and checked according to the pre-tightening force requirements, the entire system can be driven by the hydraulic device to carry out the test.

[0047] Although the specific implementation manners of the present utility model are described above in conjunction with the drawings, it is not a limitation to the protection scope of the present utility model. Those skilled in the art should understand that based on the technical solutions of the present utility model, various modifications or deformations that can be made by those skilled in the art without creative labor are still within the protection scope of the present utility model.

Claims

1. A universal trailer bar adapter clamp, characterized in that: It comprises a height adjustment plate and a clamping plate, one side of the height adjustment plate is connected to the clamping plate, and the other side is connected to the output shaft of the hydraulic cylinder; A mounting hole is provided at one end of the clamping plate away from the height adjustment plate, and the mounting hole includes a long hole provided along the length direction of the clamping plate and a circular hole penetrating the upper end surface and the lower end surface of the clamping plate, and the long hole is connected with the circular hole; the hook body of the trailer bar is transferred by sliding into the mounting hole on the clamping plate.

2. A universal trailer bar adapter clamp according to claim 1, characterized in that: An oblique supporting plate is arranged between the clamping plate and the height adjusting plate.

3. The universal trailer bar adapter clamp according to claim 1, characterized in that: A trailer ball is arranged at the upper end of the hook body of the trailer bar, the size of the circular hole is smaller than the size of the trailer ball, and the trailer ball is located above the circular hole.

4. The universal trailer bar adapter clamp according to claim 1, characterized in that: The height adjustment plate includes a first fixed plate and a second fixed plate; one side of the first fixed plate is connected to the clamping plate, the other side of the first fixed plate is connected to the second fixed plate through a position adjustment component, and the other side of the second fixed plate is connected to the hydraulic cylinder output shaft.

5. The universal trailer bar adapter clamp according to claim 4, characterized in that: The position adjustment assembly comprises bolt holes and fixing bolts respectively arranged at corresponding positions of the first fixing plate and the second fixing plate, and the height of the first fixing plate can be adjusted by the cooperation of the bolt holes and the fixing bolts.

6. The universal trailer bar adapter clamp according to claim 5, characterized in that: The first fixing plate and the second fixing plate are respectively provided with two groups of bolt holes, and the two groups of bolt holes are respectively located on two sides of the fixing plates.

7. The universal trailer bar adapter clamp according to claim 4, characterized in that: The size of the second fixing plate is greater than that of the first fixing plate.

8. The universal trailer bar adapter clamp according to claim 1, characterized in that: The output shaft of the hydraulic cylinder is connected to the height adjustment plate via bolts.

9. The universal trailer bar adapter clamp according to claim 1, characterized in that: A plurality of limiting holes are arranged on the clamping plate, and the hook body of the trailer bar is limited by inserting limiting rods into the limiting holes.

10. The universal trailer bar adapter clamp according to claim 9, characterized in that: The limiting hole passes through two side surfaces of the clamping plate.

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