Lifting device

Abstract

The utility model relates to a lifting device, which solves the technical problem that a locking device fails to lock and is inconvenient to operate, and comprises a support leg, a swing seat, a fixed seat and a swing adjusting structure, the fixed seat and the swing seat can swing relatively, one end of the swing seat is connected with the support leg, and the other end of the swing seat is connected with the fixed seat. A locking hole is formed in the fixing seat, an adjusting disc is arranged on the swing seat, an adjusting hole is formed in the adjusting disc, the swing adjusting structure comprises a handle, a locking frame and a locking pin, the locking frame is arranged between the handle and the fixing seat, one end of the locking pin is connected with the handle, and the other end of the locking pin penetrates through the locking frame, the locking hole and the adjusting hole and can enter and exit along the adjusting hole. One end of the handle is provided with a flange. The trailer can be widely applied to the field of trailers and motor homes.

Description

Technical Field

[0001] This utility model relates to the field of trailers and RVs, and in particular to a lifting device. Background Technology

[0002] When the trailer is detached from the towing vehicle, the trailer outriggers support the trailer and maintain its parking stability. For motorhomes, installing outriggers can assist in tire load-bearing and extend tire life.

[0003] To facilitate adjustment of the outriggers' support angle and retraction of the outriggers before driving, Chinese utility model patent CN202245911U discloses a "jack for a trailer," which has a positioning component on the top surface of the outer cylinder, positioned by a deflection device. The deflection device causes the positioning component to deflect and position at any predetermined angle. The positioning component is a U-shaped body with a pivot hole, several insertion holes, and clamping holes for clamping. The deflection device has a positioning plate and a pull handle. The positioning plate has several positioning holes around its perimeter and a central hole. The pull handle has a positioning pin inserted into one of the insertion holes, and several insertion pins inserted into the insertion holes. A bolt is inserted into the pivot hole of the positioning component and the central hole of the positioning plate, pivotally connecting the positioning component to the outer cylinder. The positioning plate is also fixed to the outer cylinder. In use, by pulling the handle a certain distance, the inner surface of the handle presses against the pull ring. Pulling it a certain distance further, the handle and pull ring move together, causing the pull ring to move the insert pin, which temporarily disengages from the positioning hole of the positioning plate. The handle is used to deflect the positioning component by an angle. Then, the handle is released, and the pull ring and insert pin are restored by the elastic force. The insert pin enters the positioning hole of the positioning plate, thus positioning the positioning component at an angle to support the supported object.

[0004] The above solution has the following problems during use: First, the pull ring is easily worn during frequent contact with the pull handle, which poses a risk of failure in locking the insertion pin; second, the operator needs to directly overcome the elastic force of the elastic element to work, which is laborious. Summary of the Invention

[0005] In order to solve the technical problems of locking failure and inconvenient operation of existing lifting devices, this utility model provides a lifting device that is reliable in locking, easy to operate, and labor-saving.

[0006] Therefore, this utility model provides a lifting device, which includes a support leg, a swing seat, a fixed seat, and a swing adjustment structure. One end of the swing seat is connected to the support leg, and the other end is connected to the fixed seat. The fixed seat and the swing seat can swing relative to each other. The fixed seat is provided with a locking hole, and the swing seat is provided with an adjustment plate. The adjustment plate is provided with an adjustment hole. The swing adjustment structure includes a handle, a locking frame, and a locking pin. The locking frame is located between the handle and the fixed seat. One end of the locking pin is connected to the handle, and the other end passes through the locking frame, the locking hole, and the adjustment hole, and can move in and out along the adjustment hole. One end of the handle is provided with a flange.

[0007] Preferably, the swing adjustment structure further includes an elastic element for resetting the locking pin.

[0008] Preferably, the elastic element is a spring, which is sleeved on the locking pin.

[0009] Preferably, the lifting device further includes a rotating shaft, and the locking frame has a fixing part, a supporting part and a guiding part. The fixing part has a rotating shaft hole, through which the rotating shaft passes. The fixing part also has a through hole corresponding to the locking hole. The guiding part has a guide hole corresponding to the through hole. The locking pin passes through the guide hole, the through hole and the locking hole, and cooperates with the adjusting hole.

[0010] Preferably, the handle includes a gripping part, a connecting part, and a supporting part. The connecting part of the handle is connected to the locking pin through a connecting pin. The supporting part of the handle is located at one end of the handle and has a flange cross-section. The flange abuts against the guide part of the locking frame. The gripping part is located at the end of the handle away from the supporting part.

[0011] Preferably, it also includes a conversion structure, which is connected to the fixed base.

[0012] The beneficial effects of this utility model are:

[0013] (1) This utility model has a handle with a flange structure. The handle pulls the locking pin through the lever principle, which reduces the force applied by the operator and makes it easy and convenient to use.

[0014] (2) By adding a conversion structure, this utility model can be adapted to the bottom beam of the vehicle body with different widths. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is an exploded view of the fixed seat and the swing seat in this utility model;

[0017] Figure 3 This is a three-dimensional structural diagram of the locking frame in this utility model;

[0018] Figure 4 This is a cross-sectional view of the present invention along the axis of the locking pin;

[0019] Figure 5 This is a three-dimensional structural diagram of the handle of this utility model;

[0020] Figure 6 This is a schematic diagram illustrating another action of the handle of this utility model.

[0021] Explanation of symbols in the attached drawings:

[0022] 100. Fixed base, 110. Top plate, 120. Side plate, 131. Mounting hole, 132. Locking hole, 200. Swing base, 300. Swing adjustment structure, 310. Adjustment plate, 311. Connecting hole, 312. Adjustment hole, 320. Locking pin, 321. Locking end, 322. Drive end, 330. Locking frame, 331. Fixed part, 332. Support part, 333. Guide part, 334. Rotary shaft hole, 335. Through hole, 336. Guide hole, 340. Return spring, 341. Limiting pad, 342. Cotter pin, 350. Handle, 351. Holding part, 352. Connecting part, 353. Support part, 3531. Flange, 354. Connecting pin, 400. Rotary shaft, 500. Conversion structure, 600. Support leg. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, so that those skilled in the art to which the present invention pertains can easily implement the present invention.

[0024] like Figure 1 As shown, this utility model provides a lifting device, which includes a support leg 600, a fixed seat 100, a swing seat 200 and a swing adjustment structure 300.

[0025] like Figure 2 As shown, the mounting base 100 is an inverted U-shaped structure, which includes a top plate 110 and two side plates 120, and can be formed by bending or welding. Mounting holes 131 for connecting to the vehicle body are correspondingly provided on the two side plates 120 of the mounting base 100.

[0026] The swing seat 200 is a square tubular structure. One end extends into the fixed seat 100 and is positioned between the two side plates 120. It is connected to the two side plates 120 of the fixed seat 100 via a pivot 400, allowing it to swing between the two side plates 120 and the fixed seat 100. The other end of the swing seat 200 is used to connect to the support leg 600. The structure of the support leg 600 is a conventional structure and will not be described in detail here.

[0027] The swing adjustment structure 300 includes an adjustment disc 310, a locking pin 320, a locking frame 330, a return spring 340, and a handle 350.

[0028] The adjusting disc 310 is disc-shaped, with a connecting hole 311 at the center of its surface and several adjusting holes 312 arranged in a ring around the connecting hole 311. The adjusting disc 310 is welded to the swing seat 200, and the rotating shaft 400 passes through the connecting hole 311; a locking hole 132 is provided on the fixed seat 100 corresponding to the adjusting holes 312.

[0029] like Figure 3 and Figure 4As shown, the locking frame 330 is formed by bending sheet metal, and is roughly "C" shaped. It includes a fixing part 331, a support part 332, and a guide part 333. The entire frame is welded to the side plate 120 of the fixing base 100 by the fixing part 331. A pivot hole 334 is provided on the fixing part 331 of the locking frame 330, through which the pivot 400 passes into the fixing base 100. A through hole 335 is provided on the fixing part 331 of the locking frame 330 corresponding to the locking hole 132. A guide hole 336 is provided on the guide part 333 of the locking frame 330 corresponding to the through hole 335. The locking end 321 of the locking pin 320 passes through the through hole 335, through the locking hole 132, and engages with the adjustment hole 312. The driving end 322 of the locking pin 320 passes through the guide hole 336 and exits the locking frame 330.

[0030] The return spring 340 is sleeved on the locking pin 320, with one end abutting against the guide portion 333 of the locking frame 330, and the other end connected to the locking pin 320 via the limiting pad 341 and the cotter pin 342. The return spring 340 can also be implemented by other return devices, such as an elastic rope.

[0031] like Figure 5 , Figure 6 As shown, the handle 350 includes a gripping portion 351, a connecting portion 352, and a supporting portion 353. The gripping portion 351 and the connecting portion 352 are located at opposite ends of the handle 350. The connecting portion 352 is connected to the driving end 322 of the locking pin 320 via a connecting pin 354. The supporting portion 353 extends from the end near the connecting portion 352 toward the end away from the gripping portion 351, and its cross-section is a flange 3531. The flange 3531 abuts against the guide portion 333 of the locking frame 330. The gripping portion 351 is located at the end of the handle 350 away from the supporting portion 353.

[0032] In use, the handle 350 is turned by the gripping part 351, causing it to rotate around the hinge axis with the locking pin 320. As the working surface of the support part 353 of the handle 350 abuts against the locking frame 330, during the rotation, the flange 3531 of the support part 353 causes the handle 350 to move away from the locking frame 330, thereby driving the locking pin 320 to move in the same direction until the fixing part 331 of the locking pin 320 is pulled out of the adjusting hole 312 of the adjusting plate 310. At this time, the swing seat 200 can swing relative to the fixed seat 100 through the rotating shaft 400. The relative angle between the swing seat 200 and the fixed seat 100 can be manually adjusted so that the adjusting hole 312 corresponds to the locking hole 132. When the handle 350 is released, the locking pin 320 is reset and inserted into the adjusting hole 312 under the action of the return spring 340, and the relative swing of the swing seat 200 and the fixed seat 100 is locked again.

[0033] like Figure 1As shown, due to the varying widths of the trailer frame's underbody beams (not shown), this invention also includes a conversion structure 500. This conversion structure 500 is H-shaped, with one slot adapting to the fixing seat 100 and the other slot adapting to the frame's underbody beam. By adding the conversion structure, the outriggers can better adapt to different vehicle body models.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the scope of the claims of the present invention should be within the protection scope of the present invention.

Claims

1. A lifting device, comprising a support leg, a swing seat, a fixed seat, and a swing adjustment structure, wherein one end of the swing seat is connected to the support leg, and the other end is connected to the fixed seat, the fixed seat and the swing seat are capable of swinging relative to each other, the fixed seat is provided with a locking hole, the swing seat is provided with an adjustment disc, and the adjustment disc is provided with an adjustment hole, characterized in that, The swing adjustment structure includes a handle, a locking frame, and a locking pin. The locking frame is mounted on the fixed base. One end of the locking pin passes through the locking frame, the locking hole, and the adjustment hole, and can move in and out along the adjustment hole. The other end is connected to the handle. One end of the handle is provided with a flange.

2. The lifting device according to claim 1, characterized in that, The swing adjustment structure also includes an elastic element for resetting the locking pin.

3. The lifting device according to claim 2, characterized in that, The elastic element is a spring, which is sleeved on the locking pin.

4. The lifting device according to claim 1, characterized in that, The lifting device further includes a rotating shaft. The locking frame has a fixing part, a supporting part, and a guiding part. The fixing part has a rotating shaft hole, through which the rotating shaft passes. The fixing part also has a through hole corresponding to the locking hole. The guiding part has a guide hole corresponding to the through hole. The locking pin passes through the guide hole, the through hole, and the locking hole, and cooperates with the adjusting hole.

5. The lifting device according to claim 4, characterized in that, The handle includes a gripping part, a connecting part, and a supporting part. The connecting part of the handle is connected to the locking pin via a connecting pin. The supporting part of the handle is located at one end of the handle and has a flange cross-section. The flange abuts against the guide part of the locking frame. The gripping part is located at the end of the handle away from the supporting part.

6. The lifting device according to claim 1, characterized in that, It also includes a conversion structure, which is connected to the fixed base.

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