A type of pull arm equipped with a front-mounted box lock

Abstract

This utility model relates to a front-mounted box lock for a boom arm, comprising a connecting seat, a connecting rod, a hook, and a hydraulic cylinder. The connecting seat is fixedly mounted on the boom beam, and the connecting rod is fixedly mounted on the box. One side of the connecting rod is located within a notch in the hook. The hook is horizontally slidably connected to the connecting seat, and the hydraulic cylinder is fixedly connected to the connecting seat. A locking rod is vertically slidably connected to the hook. A locking hole is provided on the connecting rod, and the top end of the locking rod is inserted into the locking hole. This utility model achieves secondary directional locking of the box by connecting the hook and the connecting rod laterally and by connecting the locking rod and the connecting rod vertically, thereby improving the stability of the box during transportation. Specifically, the hydraulic cylinder drives the traction seat to move, causing the locking rod to first separate from the connecting rod. Then, as the hydraulic cylinder extends, the hook separates from the connecting rod, thus achieving a one-time unlocking of the box by the hook.

Description

Technical Field

[0001] This utility model relates to the field of pull arm hook technology, specifically a front-mounted box lock for pull arm mounting. Background Technology

[0002] The hook-lift self-loading device is a special working device that can be installed on a special truck chassis. Through the rotation of the hook arm, combined with its sliding or swinging, it realizes the functions of pulling, unloading, and lifting the container. It is widely used in sanitation transfer vehicles and has the advantages of convenient replacement of garbage truck containers and easy dumping of garbage.

[0003] Application number CN202421721187.X discloses a front-mounted box lock for a lifting arm, comprising two lifting arm beams spaced apart, a locking hook frame mounted on each lifting arm beam, and a connecting component mounted on the locking hook frame for slidingly mounting the locking hook frame on the lifting arm beam; a locking hook body is rotatably mounted on the locking hook frame, and an adjustment component is mounted on the locking hook frame. This device can improve safety and stability during transportation, and reduce safety hazards, when transporting boxes with high height, high center of gravity, or irregular shapes.

[0004] However, the locking hook body in the above scheme can only lock the box once, and the locking body and the box are prone to not being secure, which leads to a decrease in stability during transportation. Utility Model Content

[0005] The purpose of this utility model is to provide a front-mounted box lock for use on a pull arm, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A front-mounted lock for connecting the boom beam and the housing includes a connecting seat, a connecting rod, a hook, and a hydraulic cylinder. The connecting seat is fixedly mounted on the boom beam, and the connecting rod is fixedly mounted on the housing. One side of the connecting rod is located within a notch in the hook. The hook is horizontally slidably connected to the connecting seat. The hydraulic cylinder is fixedly connected to the connecting seat. A locking rod is vertically slidably connected to the hook. A locking hole is provided on the connecting rod, and the top end of the locking rod is inserted into the locking hole. A traction assembly is connected between the locking rod and the hook. The hydraulic cylinder cooperates with the traction assembly.

[0008] Preferably, the traction assembly includes a cavity, a second spring, a guide groove, and a drive rod. The cavity is formed on the hook body, and the locking rod is vertically and elastically connected to the cavity through the second spring. A guide groove communicating with the outside is formed on the side of the cavity. The drive rod is fixedly connected to the locking rod and slidably connected to the guide groove. The hydraulic cylinder cooperates with the drive rod through the traction component.

[0009] Preferably, the traction component includes a traction seat, a push plate, and a traction groove. The traction seat is horizontally slidably connected to the connecting seat, the push plate is fixedly connected to the inner wall of the traction seat, the traction groove is opened on the surface of the push plate, and the top wall of the traction groove is inclined and in contact with the surface of the drive rod. The output end of the hydraulic cylinder is connected to the traction seat.

[0010] Preferably, the hook body has a clearance groove for accommodating the traction seat.

[0011] Preferably, a T-shaped guide rail is fixedly connected to the connecting seat, and the traction seat is slidably connected to the T-shaped guide rail.

[0012] Preferably, the inner wall of the connecting seat is provided with a sliding groove, and the surface of the hook body is connected to a slider, which is elastically slidably connected inside the sliding groove.

[0013] Preferably, a guide rod is fixedly installed on the inner wall of the slide groove, the slider is axially slidably connected to the guide rod, and a first spring is fixedly connected between the slider and the slide groove.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This utility model achieves secondary directional locking of the box by connecting the hook body to the connecting rod laterally and by connecting the locking rod to the connecting rod vertically, thereby improving the stability of the box during transportation. Specifically, the hydraulic cylinder drives the traction seat to move, causing the locking rod to separate from the connecting rod first. Then, as the hydraulic cylinder extends, the hook body separates from the connecting rod, thus achieving one-time unlocking of the box by the hook body. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the bottom structure of this utility model;

[0018] Figure 3 This is a side view of the present invention.

[0019] Figure 4 This is a schematic diagram of the connection structure between the push plate and the drive rod of this utility model;

[0020] Figure 5 This is a schematic diagram of the connection structure between the hook body and the locking rod of this utility model.

[0021] In the diagram: 1. Boom beam; 2. Connecting seat; 3. Connecting rod; 4. Hook body; 5. Hydraulic cylinder; 6. Traction seat; 7. T-shaped guide rail; 8. Locking rod; 9. Locking hole; 10. Slide groove; 11. Guide rod; 12. First spring; 13. Push plate; 14. Traction groove; 15. Clearance groove; 16. Drive rod; 17. Guide groove; 18. Second spring; 19. Cavity; 20. Slider. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-5 This utility model provides a technical solution:

[0024] A front-mounted lock for connecting the boom beam 1 and the housing includes a connecting seat 2, a connecting rod 3, a hook 4, and a hydraulic cylinder 5. The connecting seat 2 is fixedly installed on the boom beam 1, and the connecting rod 3 is fixedly installed on the housing. One side of the connecting rod 3 is located in the notch of the hook 4. The hook 4 is horizontally slidably connected to the connecting seat 2. The hydraulic cylinder 5 is fixedly connected to the connecting seat 2. A locking rod 8 is vertically slidably connected to the hook 4. A locking hole 9 is provided on the connecting rod 3. The top end of the locking rod 8 is inserted into the locking hole 9. A traction assembly is connected between the locking rod 8 and the hook 4. The hydraulic cylinder 5 cooperates with the traction assembly.

[0025] Please see Figures 1 to 3 When unlocking is required, the hydraulic cylinder 5 drives the locking rod 8 to move through the traction component, so that the top of the locking rod 8 gradually disengages from the inside of the lock hole 9 to achieve vertical unlocking of the box. As the hydraulic cylinder 5 continues to extend, the hydraulic cylinder 5 can push the hook 4 to move as a whole through the traction component, so that the hook 4 gradually separates from the connecting rod 3, thereby achieving horizontal unlocking of the box.

[0026] The traction assembly includes a cavity 19, a second spring 18, a guide groove 17, and a drive rod 16. The cavity 19 is formed on the hook body 4. The locking rod 8 is vertically and elastically connected to the cavity 19 through the second spring 18. The side of the cavity 19 is provided with a guide groove 17 that communicates with the outside. The drive rod 16 is fixedly connected to the locking rod 8 and slidably connected to the guide groove 17. The hydraulic cylinder 5 cooperates with the drive rod 16 through the traction component.

[0027] Please see Figure 5 In this embodiment, the locking rod 8 moves vertically inside the cavity 19. Therefore, when the locking rod 8 gradually moves down, the top of the locking rod 8 can disengage from the inside of the lock hole 9. By pressing down the drive rod 16, the drive rod 16 moves down inside the guide groove 17, so that the drive rod 16 drives the locking rod 8 to move down synchronously inside the cavity 19. Therefore, for the traction member, the role of the traction member is to convert the horizontal movement of the hydraulic cylinder 5 into the vertical movement of the drive rod 16.

[0028] The traction component includes a traction seat 6, a push plate 13, and a traction groove 14. The traction seat 6 is horizontally slidably connected to the connecting seat 2. The push plate 13 is fixedly connected to the inner wall of the traction seat 6. The traction groove 14 is opened on the surface of the push plate 13, and the top wall of the traction groove 14 is inclined and contacts the surface of the drive rod 16. The output end of the hydraulic cylinder 5 is connected to the traction seat 6.

[0029] Please see Figure 4 In this embodiment, a specific structure of a traction member is provided. When the hydraulic cylinder 5 gradually extends, the output end of the hydraulic cylinder 5 can push the traction seat 6 on the connecting seat 2 to move towards the hook body 4. At this time, the traction seat 6 can drive the push plate 13 and the traction groove 14 on its surface to move synchronously. Since the traction groove 14 gradually approaches the drive rod 16 and the top wall of the traction groove 14 is inclined, as the traction groove 14 moves, the inclined top wall of the traction groove 14 can gradually press down on the drive rod 16 so that the drive rod 16 drives the locking rod 8 to move synchronously.

[0030] The hook body 4 has a clearance groove 15 for accommodating the traction seat 6.

[0031] Please see Figure 4 The clearance groove 15 provides space for the towing seat 6 to move.

[0032] A T-shaped guide rail 7 is fixedly connected to the connecting seat 2, and the traction seat 6 is slidably connected to the T-shaped guide rail 7.

[0033] Please see Figure 1 and Figure 3 When the traction seat 6 moves, it can slide on the T-shaped guide rail 7. The T-shaped guide rail 7 can guide the movement of the traction seat 6 so that the traction groove 14 and the drive rod 16 can cooperate stably.

[0034] The inner wall of the connecting seat 2 is provided with a sliding groove 10. The surface of the hook body 4 is connected to a slider 20. The slider 20 is elastically slidably connected inside the sliding groove 10. A guide rod 11 is fixedly installed on the inner wall of the sliding groove 10. The slider 20 is axially slidably connected to the guide rod 11. A first spring 12 is fixedly connected between the slider 20 and the sliding groove 10.

[0035] Please see Figure 2 , Figure 3 and Figure 5 In this embodiment, when unlocking the hook 4 and the connecting rod 3, it is necessary to first engage the locking rod 8 and the locking hole 9. Only then can the hook 4 be separated from the connecting rod 3 by translating it. Therefore, when the hydraulic cylinder 5 extends, it is necessary to first move the traction seat 6 independently while keeping the hook 4 stationary. The elastic force of the first spring 12 is much greater than that of the second spring 18. During the process of the traction seat 6 driving the traction groove 14 to push the drive rod 16 downward through the push plate 13, the drive rod 16 can drive the locking rod 8 to compress the second spring 18 inside the cavity 19. However, at this time, for the hook 4, the slider 20 is supported by the first spring 12 in the groove 10. The thrust from the hydraulic cylinder 5 on the slider 20 is insufficient to deform the first spring 12. The hook 4 remains stationary, and the locking rod 8 gradually disengages from the lock hole 9. Then, as the hydraulic cylinder 5 extends, the push plate 13 directly pushes the hook 4 horizontally via the drive rod 16, causing the hook 4 to slide the slider 20 inside the groove 10. At the same time, the first spring 12 is compressed to store energy until the hook 4 separates from the connecting rod 3. When relocking is required, the hydraulic cylinder 5 gradually resets. Since the elastic force of the first spring 12 is much greater than that of the second spring 18, the first spring 12 resets first to drive the hook 4 to reconnect to the connecting rod 3. As the hydraulic cylinder 5 gradually resets, the second spring 18 also releases energy to drive the top of the locking rod 8 back into the lock hole 9, thus achieving one-time locking and one-time unlocking between the hook 4 and the connecting rod 3.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A front-mounted lock for connecting the pull arm beam (1) and the housing, characterized in that, The device includes a connecting seat (2), a connecting rod (3), a hook body (4), and a hydraulic cylinder (5). The connecting seat (2) is fixedly installed on the boom beam (1), the connecting rod (3) is fixedly installed on the box body, one side of the connecting rod (3) is located in the notch of the hook body (4), the hook body (4) is horizontally slidably connected to the connecting seat (2), the hydraulic cylinder (5) is fixedly connected to the connecting seat (2), a locking rod (8) is vertically slidably connected to the hook body (4), a locking hole (9) is opened on the connecting rod (3), the top end of the locking rod (8) is inserted into the locking hole (9), a traction assembly is connected between the locking rod (8) and the hook body (4), and the hydraulic cylinder (5) cooperates with the traction assembly.

2. A front-mounted lock for a pull arm as described in claim 1, characterized in that, The traction assembly includes a cavity (19), a second spring (18), a guide groove (17), and a drive rod (16). The cavity (19) is opened on the hook body (4). The locking rod (8) is vertically and elastically connected to the cavity (19) through the second spring (18). The side of the cavity (19) is provided with a guide groove (17) that communicates with the outside. The drive rod (16) is fixedly connected to the locking rod (8) and slidably connected to the guide groove (17). The hydraulic cylinder (5) cooperates with the drive rod (16) through the traction component.

3. A front-mounted lock for a pull arm according to claim 2, characterized in that, The traction component includes a traction seat (6), a push plate (13), and a traction groove (14). The traction seat (6) is horizontally slidably connected to the connecting seat (2). The push plate (13) is fixedly connected to the inner wall of the traction seat (6). The traction groove (14) is opened on the surface of the push plate (13), and the top wall of the traction groove (14) is inclined and contacts the surface of the drive rod (16). The output end of the hydraulic cylinder (5) is connected to the traction seat (6).

4. A front-mounted lock for a pull arm according to claim 2, characterized in that, The hook (4) is provided with a clearance groove (15) for accommodating the traction seat (6).

5. A front-mounted lock for a pull arm according to claim 3, characterized in that, A T-shaped guide rail (7) is fixedly connected to the connecting seat (2), and the traction seat (6) is slidably connected to the T-shaped guide rail (7).

6. A front-mounted lock for a pull arm according to claim 3 or 4, characterized in that, The inner wall of the connecting seat (2) is provided with a groove (10), and the surface of the hook body (4) is connected with a slider (20), which is elastically slidably connected inside the groove (10).

7. A front-mounted lock for a pull arm according to claim 6, characterized in that, A guide rod (11) is fixedly installed on the inner wall of the slide groove (10), and the slider (20) is axially slidably connected to the guide rod (11). A first spring (12) is fixedly connected between the slider (20) and the slide groove (10).

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