Self locking latch for a dump body

Abstract

This utility model belongs to the technical field of dump truck bodies, specifically relating to a self-locking buckle for a dump truck body. It includes a frame, with the truck body connected to the top of the frame via a hydraulic system. A tailplate is hinged to the rear of the truck body. Two symmetrically arranged adjustable automatic locking components are connected between the bottom of the tailplate and the bottom of the frame. The adjustable automatic locking components are used to adjust the locking force for different road conditions. When the truck body is tilted and dumped by the hydraulic system on the frame, the end of the chain connected to the locking rod via the connecting post moves towards the sliding seat. This causes the straightened chain to loosen and bend. Furthermore, the design of the locking rod, combined with gravity, causes the end of the locking rod that overlaps the upper limit groove of the limiting block to disengage via the rotation of the pivot. Since the top of the tailplate is hinged, it automatically unfolds.

Description

Technical Field

[0001] This utility model belongs to the technical field of dump truck bodies, specifically relating to a self-locking buckle for a dump truck body. Background Technology

[0002] Currently, dump truck bodies generally use a mechanical self-locking latch structure, primarily relying on a locking tongue and slot to lock the cargo box. However, in practical use, this type of latch has the following technical problems:

[0003] The locking force is not adjustable, resulting in poor adaptability.

[0004] Traditional locks are secured by tightening with iron chains, and cannot be adjusted according to different loads and road conditions.

[0005] Defect impact:

[0006] When heavily loaded: Insufficient locking force may cause the locking tongue to loosen due to inertial impact when the carriage is bumpy or turning, or even unlock unexpectedly, causing a rollover accident;

[0007] When unloaded: Excessive locking force leads to excessive wear of the lock tongue and lock groove, reducing service life. Based on the above defects, this utility model proposes a self-locking latch for unloading truck bodies with adjustable locking force.

[0008] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0009] The purpose of this invention is to provide a self-locking buckle for a dump truck body to solve the problems of non-adjustable locking force and poor adaptability in the existing technology.

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] A self-locking latch for a dump truck body includes a frame, with a truck body connected to the top of the frame via a hydraulic system, and a tailgate hinged to the rear of the truck body. Two symmetrically arranged adjustable automatic locking assemblies are connected between the bottom end of the tailgate and the bottom end of the frame. The adjustable automatic locking assemblies are used to adjust the locking force for different road conditions.

[0012] Preferably, the adjustable automatic locking assembly includes a limiting block fixed to the bottom end of the tailgate. A limiting groove is formed on the outer end face of the limiting block away from the vehicle frame. A support rod fixed to the bottom end of the vehicle body is provided on one side of the limiting groove. An L-shaped locking rod is rotatably connected to the support rod via a rotating shaft. The top end of the locking rod rests in the limiting groove.

[0013] Preferably, a connecting post is provided above the rotating shaft and fixed to the locking rod. The outer end of the connecting post is fixed to a sliding seat with a vertical cross-section of I-shaped structure by an iron chain. The sliding seat is slidably connected to a sliding groove opened on the L-shaped bracket. The top end of the L-shaped bracket is fixed to the bottom end of the vehicle frame.

[0014] Preferably, a rotating block is fixedly connected to one end of the rotating shaft away from the locking rod, and a stop post is provided on one side of the rotating block and fixed to the outer wall of the support rod. The stop post is used to block and limit the rotating block.

[0015] Preferably, a hand-tightening screw is rotatably connected to the end of the sliding seat away from the chain, and the hand-tightening screw is threadedly connected to the end of the L-shaped bracket away from the vehicle frame.

[0016] Preferably, a hand-tightening screw is threaded to the bottom of the L-shaped bracket at one end away from the vehicle frame, and the end of the hand-tightening screw, after being tightened, abuts against the outside of the hand-tightening screw rod.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) The self-locking buckle of the dump truck body of this utility model, when the truck body is tilted and dumped by the hydraulic system on the frame, will cause the end of the chain connected to the locking rod by the connecting post to move towards the sliding seat, thereby causing the straightened chain to loosen and bend. The design of the locking rod shape, combined with the effect of gravity, will cause the end of the locking rod that overlaps in the upper limit groove of the limiting block to disengage through the rotation of the shaft. At this time, the top of the tail plate will automatically unfold because it is hinged. When the clamping force of the locking rod is adjusted for different road conditions, the hand screw can be turned manually, thereby causing the sliding seat to pull one end of the chain and causing the other end of the chain to tighten the locking rod through the connecting post. This allows for adjustment of the slack of the chain, which is convenient for different road conditions. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional first-view structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the overall three-dimensional second-view structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the overall three-dimensional third-view structure of this utility model;

[0022] Figure 4 This is an enlarged structural diagram of point A of this utility model;

[0023] Figure 5 This is an enlarged structural diagram of point B of this utility model;

[0024] Explanation of key figure labels:

[0025] 1. Frame; 11. Cargo box; 12. Tailgate; 2. Adjustable automatic locking assembly; 21. Limit block; 211. Limit groove; 22. Locking rod; 23. Rotating shaft; 231. Support rod; 232. Rotating block; 233. Stop post; 24. Connecting post; 25. Chain; 26. Sliding seat; 27. L-shaped bracket; 28. Hand-tightening screw; 29. ​​Handle; 210. Hand-tightening screw. Detailed Implementation

[0026] The technical solution of this utility model patent will be clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] The locking force is not adjustable, resulting in poor adaptability.

[0030] Traditional locks are secured by a 25mm iron chain, which cannot be adjusted according to different loads and road conditions.

[0031] Defect impact:

[0032] When under heavy load: If the locking force is insufficient, the locking tongue may loosen due to inertial impact when the carriage 11 is bumpy or turning, or even be accidentally unlocked, causing a rollover accident.

[0033] When unloaded: Excessive locking force leads to excessive wear on the bolt and lock groove, reducing service life.

[0034] See attached document Figure 1-5 A self-locking buckle for a dump truck body includes a frame 1, with a truck body 11 connected to the top of the frame 1 via a hydraulic system. A tail plate 12 is hinged to the rear of the truck body 11. Two symmetrically arranged adjustable automatic locking components 2 are connected between the bottom of the tail plate 12 and the bottom of the frame 1. The adjustable automatic locking components 2 are used to adjust the locking force for different road conditions.

[0035] Furthermore, such as Figure 1-5 As shown, in order to adjust the locking force for different road conditions, the adjustable automatic locking assembly 2 includes a limiting block 21 fixed to the bottom of the tail plate 12. A limiting groove 211 is formed on the outer end face of the limiting block 21 away from the frame 1. A support rod 231 fixed to the bottom of the carriage 11 is provided on one side of the limiting groove 211. An L-shaped locking rod 22 is rotatably connected to the support rod 231 via a rotating shaft 23. The top of the locking rod 22 presses against the limiting groove 211. A connecting post 24 fixed to the locking rod 22 is also provided above the rotating shaft 23. A sliding seat 26 with a vertical cross section is fixed to the outer end of the connecting post 24 via a chain 25. The sliding seat 26 is slidably connected to the L-shaped locking rod 22. In the sliding groove opened on the L-shaped bracket 27, the top of the L-shaped bracket 27 is fixed to the bottom of the frame 1. A rotating block 232 is fixed to the end of the rotating shaft 23 away from the locking rod 22. A stop post 233 is fixed to the side of the rotating block 232 and is fixed to the outer wall of the support rod 231. The stop post 233 is used to block and limit the rotating block 232. A hand screw 28 is rotatably connected to the end of the sliding seat 26 away from the iron chain 25. The hand screw 28 is threaded to the end of the L-shaped bracket 27 away from the frame 1. A hand screw 210 is threaded to the bottom of the end of the L-shaped bracket 27 away from the frame 1. The end of the hand screw 210 after being locked is pressed against the outside of the hand screw 28.

[0036] The purpose of locking the hand-tightening screw 210 to the hand-tightening screw 28 is to limit and fix the hand-tightening screw 28, so as to prevent the hand-tightening screw 28 from vibrating and rotating due to the movement of the vehicle;

[0037] A handle 29 is fixed to the end of the hand-tightening screw 28 away from the sliding seat 26.

[0038] In actual use, when the carriage 11 is tilted and unloaded by the hydraulic system on the frame 1, the end of the chain 25 connected to the locking rod 22 via the connecting post 24 will move towards the sliding seat 26, causing the straightened chain 25 to loosen and bend. The design of the locking rod 22, combined with the effect of gravity, causes the end of the locking rod 22 that overlaps in the upper limit groove 211 of the limit block 21 to disengage through the rotation of the shaft 23. At this time, the top of the tail plate 12 will automatically unfold because it is hinged. When the clamping force of the locking rod 22 is adjusted for different road conditions, the hand screw 28 can be turned manually, which causes the sliding seat 26 to pull one end of the chain 25, and the other end of the chain 25 to tighten the locking rod 22 via the connecting post 24. This allows for adjustment of the slack of the chain 25, making it convenient for different road conditions.

[0039] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A self-locking buckle for a dump truck body, comprising a frame (1), a truck body (11) connected to the top of the frame (1) via a hydraulic system, and a tail plate (12) hinged to the rear of the truck body (11), characterized in that, Two symmetrically arranged adjustable automatic locking assemblies (2) are connected between the bottom end of the tail plate (12) and the bottom end of the frame (1). The adjustable automatic locking assembly (2) is used to adjust the locking force for different road conditions.

2. The self-locking latch of a self-unloading vehicle body according to claim 1, wherein, The adjustable automatic locking assembly (2) includes a limiting block (21) fixed to the bottom end of the tail plate (12). A limiting groove (211) is provided on the outer end face of the limiting block (21) away from the frame (1). A support rod (231) fixed to the bottom end of the carriage (11) is provided on one side of the limiting groove (211). An L-shaped locking rod (22) is rotatably connected to the support rod (23) via a rotating shaft (23). The top end of the locking rod (22) is pressed into the limiting groove (211).

3. The self-locking latch of a self-unloading vehicle body according to claim 2, wherein, Above the pivot (23) is a connecting post (24) fixed to the locking rod (22). The outer end of the connecting post (24) is fixed to a sliding seat (26) with an I-shaped vertical cross section by an iron chain (25). The sliding seat (26) is slidably connected to a sliding groove opened on the L-shaped bracket (27). The top end of the L-shaped bracket (27) is fixed to the bottom end of the frame (1).

4. The self-locking latch of a self-unloading vehicle body according to claim 3, wherein, A rotating block (232) is fixedly connected to one end of the rotating shaft (23) away from the locking rod (22). A stop post (233) is fixedly connected to the outer wall of the support rod (231) on one side of the rotating block (232). The stop post (233) is used to block and limit the rotating block (232).

5. The self-locking latch of a self-unloading vehicle body according to claim 4, wherein, A hand-tightening screw (28) is rotatably connected to one end of the sliding seat (26) away from the iron chain (25), and the hand-tightening screw (28) is threadedly connected to one end of the L-shaped bracket (27) away from the frame (1).

6. The self-locking latch of a self-unloading vehicle body according to claim 5, wherein, A hand screw (210) is threaded to the bottom of the L-shaped bracket (27) away from the frame (1), and the end of the hand screw (210) after being tightened abuts against the outside of the hand screw (28).

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