Slow descent joint for dumper
By designing a slow-down joint for a dump truck including a joint body, an elastic retaining ring, a return spring and a current limiting plate, the problems of complex structure and high cost of slow-down joints in the prior art are solved, and the slow-down speed of the dump truck and the safety risk are reduced.
Patent Information
- Application Number
- CN202421848624.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-07-31
AI Technical Summary
The structure of existing dump trucks is complex, resulting in high production and application costs, and lacks a slow-down joint with simple structure and low cost.
A slow-down joint for dump trucks is designed, including the joint body, elastic retaining ring, return spring and current limiting plate. Through the cooperation of these components, the speed of the dump truck is not affected during the upward journey and has a slow-down function during the downward journey.
The downward speed of the dump truck is slowed down, reducing the safety risks caused by the rapid downward speed. At the same time, the overall structure is small and low-cost, and it is suitable for different application scenarios.
Smart Images
Figure CN223004600U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hydraulic control systems for dump trucks, and particularly to a descent-reducing joint for a dump truck. Background Art
[0002] A descent-reducing joint is an auxiliary component in the hydraulic control system of a dump truck, and is applicable to certain special function dump truck models that require a descent reduction in the downward speed.
[0003] The descent-reducing joint is often installed in the pipeline of the execution unit. In terms of function realization, the descent-reducing joint does not change the upward speed of the system, but only acts on the downward movement of the system, playing a role in safety protection. Its descent reduction utilizes the principle of flow rate change. By changing the cross-sectional area of the fluid passage of the execution unit, and on the premise of constant load, the flow rate passing through per unit time is reduced, so as to reduce the downward speed of the system and extend the downward operation time of the system, that is: achieve the purpose of descent reduction.
[0004] Existing descent-reducing joints are relatively complex in structure, so their manufacturing requirements and application costs are relatively high. At present, there is a lack of a descent-reducing joint for a dump truck with a simple structure and low application cost.
[0005] In view of this, overcoming the defects of the existing technology is an urgent problem to be solved in this technical field. Content of the Utility Model
[0006] The utility model provides a solution to the technical problems of the relatively complex structure and high application cost of the descent-reducing joint in the existing technology.
[0007] To solve the above technical problems, the utility model provides a descent-reducing joint for a dump truck, including:
[0008] A joint body 1, an elastic retaining ring 2, a return spring 3 and a flow-limiting plate 4;
[0009] The joint body 1 is arranged on the flow pipeline of the hydraulic oil. The elastic retaining ring 2, the return spring 3 and the flow-limiting plate 4 are arranged in the cavity of the joint body 1. The return spring 3 is located between the elastic retaining ring 2 and the flow-limiting plate 4. The elastic retaining ring 2 is located on one side of the hydraulic cylinder 5, and the flow-limiting plate 4 is located on one side of the reversing valve 6; wherein, during the upward and downward processes of the dump truck, the hydraulic oil can pass through the elastic retaining ring 2 and the flow-limiting plate 4.
[0010] Preferably, the joint body 1 includes a first cavity 11, a second cavity 12 and a third cavity 13 that are connected in sequence; wherein, the elastic retaining ring 2, the return spring 3 and the flow-limiting plate 4 are arranged in the second cavity 12.
[0011] Preferably, the cross-sectional widths of the first cavity 11, the second cavity 12 and the third cavity 13 increase in sequence.
[0012] Preferably, a limiting groove 121 is further provided inside the second cavity 12; wherein, the elastic retaining ring 2 is arranged in the limiting groove 121.
[0013] Preferably, ears 21 are symmetrically arranged at the end of the elastic retaining ring 2.
[0014] Preferably, an arc-shaped groove 41 is circumferentially arranged at the outer ring of the flow-limiting plate 4.
[0015] Preferably, the joint body 1 is arranged at the oil inlet of the hydraulic cylinder 5 or the oil outlet of the reversing valve 6.
[0016] Preferably, the joint body 1 is arranged on the pipeline between the oil inlet of the hydraulic cylinder 5 and the oil outlet of the reversing valve 6.
[0017] Preferably, different specifications of threads are provided at both ends of the joint body 1.
[0018] Aiming at the deficiencies in the prior art, the beneficial effects that the present utility model can achieve are as follows:
[0019] The whole of the present utility model has the technical advantages of small structure and low cost. With the cooperation of components such as the elastic retaining ring, the return spring and the flow-limiting plate, the speed of the dump truck during the upward movement can be unaffected, and it has a slow-down function during the downward movement, which can reduce the safety risks caused by the too fast downward speed of the dump truck.
[0020] Furthermore, the installation and application method of the present utility model is flexible. During installation, it does not need to occupy a large space and can be installed at the oil inlet of the hydraulic cylinder, the oil outlet of the reversing valve or the pipeline between the oil inlet of the hydraulic cylinder and the oil outlet of the reversing valve, which can adapt to different application scenarios and is convenient for actual popularization and application.
[0021] Furthermore, the present utility model also has an anti-mistake function. By setting different specifications of threads at both ends of the slow-down joint body, it can effectively prevent it from being installed reversely. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments of the present utility model. Obviously, the following described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.
[0023] Figure 1 It is a schematic cross-sectional structure view of a slow-down joint for a dump truck provided in this embodiment;
[0024] Figure 2 is Figure 1 a schematic structure view of the joint body in
[0025] Figure 3 is Figure 1 a schematic structural view of the elastic retaining ring in
[0026] Figure 4 is Figure 1 a schematic structural view of the current-limiting plate in
[0027] Figure 5 a schematic view of the application state of a damping joint for a dump truck provided in this embodiment.
[0028] In the drawings, the same reference numerals are used to denote the same components or structures, where:
[0029] 1 - joint body, 11 - first cavity, 12 - second cavity, 121 - limiting groove, 13 - third cavity; 2 - elastic retaining ring, 21 - ear; 3 - return spring; 4 - current-limiting plate, 41 - arc groove; 5 - hydraulic cylinder; 6 - reversing valve. Detailed implementation manners
[0030] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0031] In the description of the present utility model, the orientation or positional relationship indicated by the terms "inner", "outer", "longitudinal", "transverse", "upper", "lower", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model rather than requiring the present utility model to be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.
[0032] In addition, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.
[0033] A damping joint for a dump truck provided in this embodiment, as Figures 1-5 shown, includes: a joint body 1, an elastic retaining ring 2, a return spring 3 and a current-limiting plate 4; the joint body 1 is arranged on the flow pipeline of hydraulic oil, the elastic retaining ring 2, the return spring 3 and the current-limiting plate 4 are arranged in the cavity of the joint body 1, the return spring 3 is located between the elastic retaining ring 2 and the current-limiting plate 4, the elastic retaining ring 2 is located on one side of the hydraulic cylinder 5, and the current-limiting plate 4 is located on one side of the reversing valve 6; wherein, during the upward and downward movement of the dump truck, the hydraulic oil can pass through the elastic retaining ring 2 and the current-limiting plate 4. In this embodiment, the joint body 1, the elastic retaining ring 2, the return spring 3 and the current-limiting plate 4 can all be made of stainless steel.
[0034] A descent - speed - reducing joint for a dump truck provided in this embodiment is simple, compact in overall structure and low - cost compared with the prior art. It can ensure that the speed of the dump truck is not affected during the upward movement, and has a descent - speed - reducing function during the downward movement, which can effectively reduce the safety risks caused by the too - fast downward speed of the dump truck.
[0035] As Figure 2 shown, it is Figure 1 a schematic structural diagram of the joint body in . The joint body 1 includes a first cavity 11, a second cavity 12, and a third cavity 13 that are connected in sequence. Specifically, when set, the cross - sectional widths of the first cavity 11, the second cavity 12, and the third cavity 13 increase in sequence, so as to control the flow rate of the hydraulic oil. Among them, the elastic retaining ring 2, the return spring 3, and the flow - limiting plate 4 are arranged in the second cavity 12.
[0036] To facilitate the fixation of the elastic retaining ring 2, a limiting groove 121 is also provided inside the second cavity 12. Among them, the elastic retaining ring 2 is arranged in the limiting groove 121.
[0037] As Figure 3 shown, it is Figure 1 a schematic structural diagram of the elastic retaining ring in . To facilitate the installation of the elastic retaining ring 2, ears 21 are symmetrically provided at the ends of the elastic retaining ring 2. During the installation process of the elastic retaining ring 2, the ears 21 at both ends can be pinched together to quickly install the elastic retaining ring 2 into the limiting groove 121.
[0038] As Figure 4 shown, it is Figure 1 a schematic structural diagram of the flow - limiting plate in . Specifically, an arc - shaped groove 41 is circumferentially provided at the outer ring of the flow - limiting plate 4. During the downward movement of the dump truck, under the flow of the hydraulic oil, the flow - limiting plate 4 can fit with the inner wall of the joint body 1, so that a part of the arc - shaped groove 41 is blocked by the inner wall of the joint body 1, thereby restricting the flow rate of the hydraulic oil, and further realizing the descent - speed - reducing during the downward movement of the dump truck.
[0039] In addition, in some optional implementation manners, to prevent the joint body 1 from being installed reversely, different - sized threads are provided at both ends of the joint body 1, so as to achieve anti - misoperation in terms of structure.
[0040] As Figure 5 shown, it is a schematic diagram of the application state of a descent - speed - reducing joint for a dump truck provided in this embodiment.
[0041] Specifically, the joint body 1 is arranged at the oil inlet of the hydraulic cylinder 5 or the oil outlet of the reversing valve 6, or the joint body 1 is arranged on the pipeline between the oil inlet of the hydraulic cylinder 5 and the oil outlet of the reversing valve 6. Its installation and application methods are flexible and can adapt to different application scenarios.
[0042] A descent control joint for a dump truck provided in this embodiment is specifically applied as follows:
[0043] During the upward movement of the dump truck, the hydraulic oil flows through the flow limiting plate 4 and the elastic retaining ring 2 in sequence. Under the action of the flowing hydraulic oil, the flow limiting plate 4 moves towards the hydraulic cylinder 5. After the flow limiting plate 4 moves a certain distance, it abuts against the return spring 3 and achieves a hovering state under the action of the return spring 3. At this time, the lifting speed during the upward movement of the dump truck is not affected. During the downward movement of the dump truck, the hydraulic oil flows through the elastic retaining ring 2 and the flow limiting plate 4 in sequence. Under the action of the flowing hydraulic oil, the flow limiting plate 4 moves towards the reversing valve 6, so that the flow limiting plate 4 fits against the inner wall of the joint body 1, and a partial area of the arc-shaped groove 41 is blocked by the inner wall of the joint body 1, thereby restricting the flow rate of the hydraulic oil and further achieving a slow descent of the descending speed during the downward movement of the dump truck.
[0044] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A slow-descent joint for a dump truck, characterized in that: include: A joint body (1), an elastic retaining ring (2), a return spring (3) and a current limiting plate (4); The joint body (1) is arranged on a hydraulic oil circulation pipeline, the elastic retaining ring (2), the return spring (3) and the flow limiting plate (4) are arranged in a cavity of the joint body (1), the return spring (3) is located between the elastic retaining ring (2) and the flow limiting plate (4), the elastic retaining ring (2) is located on one side of the hydraulic oil cylinder (5), and the flow limiting plate (4) is located on one side of the reversing valve (6); wherein, during the upward and downward movement of the dump truck, the hydraulic oil can pass through the elastic retaining ring (2) and the flow limiting plate (4).
2. The slow-descent joint for dump trucks according to claim 1, characterized in that: The joint body (1) comprises a first cavity (11), a second cavity (12) and a third cavity (13) which are connected in sequence; wherein the elastic retaining ring (2), the return spring (3) and the current limiting plate (4) are arranged in the second cavity (12).
3. The slow-descent joint for dump trucks according to claim 2, characterized in that: The cross-sectional widths of the first cavity (11), the second cavity (12) and the third cavity (13) increase sequentially.
4. The slow-descent joint for dump trucks according to claim 3, characterized in that: A limiting groove (121) is also provided inside the second cavity (12); wherein the elastic retaining ring (2) is arranged in the limiting groove (121).
5. The slow-descent joint for dump trucks according to claim 1, characterized in that: Ears (21) are symmetrically arranged at the end of the elastic retaining ring (2).
6. The slow-descent joint for dump trucks according to claim 1, characterized in that: An arc-shaped groove (41) is circumferentially arranged at the outer ring of the flow limiting plate (4).
7. The slow-descent joint for dump trucks according to claim 1, characterized in that: The joint body (1) is arranged at the oil inlet of the hydraulic cylinder (5) or the oil outlet of the reversing valve (6).
8. The slow-descent joint for dump trucks according to claim 1, characterized in that: The joint body (1) is arranged on a pipeline between an oil inlet of a hydraulic oil cylinder (5) and an oil outlet of a reversing valve (6).
9. The slow-descent joint for dump trucks according to claim 1, characterized in that: Both ends of the joint body (1) are provided with threads of different specifications.