Dustproof device of high-strength limit torque transmission arm
The dustproof device with a split design solves the problems of troublesome lubrication and high replacement cost of traditional transmission arms, and realizes convenient lubrication and low-cost maintenance of rubber sleeve replacement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU CHENAO PRECISION MASCH CO LTD
- Filing Date
- 2025-06-04
- Publication Date
- 2026-05-05
AI Technical Summary
The dust cover of the traditional high-strength ultimate torque transmission arm is a one-piece design, which makes adding lubricating oil troublesome and replacement costly, and cannot meet the needs of efficient maintenance.
The design features a split-type dustproof device, employing a combination structure of a connecting cylinder, a plug-in cylinder, a plug-in groove, a first rubber sleeve, and a second rubber sleeve. This allows for tool-free disassembly when adding lubricating oil, and enhances connection stability through a limiting ring and an annular groove.
This achieves convenient lubricant addition and low-cost rubber sleeve replacement, improving maintenance efficiency and reducing replacement costs.
Smart Images

Figure CN224201072U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of transmission arms, specifically a dustproof device for a high-strength ultimate torque transmission arm. Background Technology
[0002] In modern industrial production and many fields involving mechanical transmission, high-strength ultimate torque transmission arms are widely used in various large-scale mechanical equipment, automated production lines, and precision instruments. During operation, these transmission arms need to withstand extremely high torque loads to ensure efficient power transmission and normal operation of the equipment. In high-dust environments, the power transmission nodes of the high-strength ultimate torque transmission arms need to be protected from dust by dust covers to extend the service life of the power transmission nodes.
[0003] However, in traditional high-strength ultimate torque transmission arms, there are many shortcomings in the dust prevention measures for high-strength ultimate torque transmission arms.
[0004] On the one hand, most dust covers are designed as a single unit, so adding lubricant to the power transmission nodes of the drive arm requires tools to remove the dust cover before lubricant can be added, which is quite troublesome and affects the efficiency of lubricant addition.
[0005] On the other hand, if a part of the dust cover is damaged, the entire dust cover needs to be replaced, which increases the cost of replacing the dust cover.
[0006] Therefore, a new technical solution needs to be designed to address this issue. Utility Model Content
[0007] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a dustproof device for a high-strength ultimate torque transmission arm. This solves the technical problem that most current dustproof sleeves are designed as a whole, so adding lubricating oil to the power transmission node of the transmission arm requires the use of tools to disassemble the dustproof sleeve before adding lubricating oil, which is quite troublesome and affects the efficiency of lubricating oil addition.
[0008] To achieve the objective of this utility model, the technical solution adopted is as follows: A dustproof device for a high-strength, ultimate torque transmission arm is designed, comprising:
[0009] The disassembly and assembly mechanism includes a connecting cylinder fixedly connected to one end of a first rubber sleeve and a plug-in cylinder fixedly connected to one end of a second rubber sleeve. The connecting cylinder and the plug-in cylinder are arranged opposite to each other. The plug-in cylinder has a plug-in groove, which is circular, and the connecting cylinder corresponds to the plug-in groove.
[0010] The mounting mechanism is used for mounting the first rubber sleeve and the second rubber sleeve.
[0011] Preferably, a limiting ring is fixedly connected to the outer side of the connecting cylinder, and annular grooves are provided on both sides of the inner cavity of the insertion groove, the internal dimensions of the annular grooves being adapted to the external dimensions of the limiting ring.
[0012] Preferably, the installation mechanism is a metal clamp, which is respectively sleeved on the outside of the first rubber sleeve and the second rubber sleeve.
[0013] Preferably, a metal sleeve is inlaid on the outer side of the connecting cylinder.
[0014] Preferably, the distance from the bottom of the inner cavity of the insertion groove to the annular groove is the same as the distance from the bottom of the first rubber sleeve to the limiting ring.
[0015] Preferably, the connecting cylinder and the plug-in cylinder are made of the same material as the first rubber sleeve.
[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0017] 1. This utility model combines a connecting cylinder, a plug-in cylinder, a plug-in groove, a first rubber sleeve, and a second rubber sleeve. When lubricating oil needs to be added, the connecting cylinder is pulled out from the plug-in groove, allowing lubricating oil to be added to the power transmission node of the transmission arm between the first and second rubber sleeves. This eliminates the need to disassemble the dustproof mechanism with tools to add lubricating oil to the power transmission node of the transmission arm, making it more convenient and improving the efficiency of lubricating oil addition. When the first or second rubber sleeve is damaged, since the first and second rubber sleeves are designed separately, only the damaged rubber sleeve needs to be replaced, rather than replacing the entire rubber sleeve, further reducing the cost of replacing damaged rubber sleeves.
[0018] 2. This utility model combines a limiting ring and an annular groove. When the connecting cylinder is inserted into the insertion groove, the limiting ring is placed in the annular groove, so that the annular groove can limit the limiting ring, thereby improving the stability of the connecting cylinder inserted into the insertion groove, and further improving the stability of the connection between the first rubber sleeve and the second rubber sleeve. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0020] Figure 2 This is a schematic diagram of the connection structure between the first rubber sleeve and the connecting cylinder of this utility model;
[0021] Figure 3 This is a schematic diagram of the connection structure between the second rubber sleeve and the insertion sleeve of this utility model;
[0022] Figure 4 This is a cross-sectional view of the connection between the second rubber sleeve and the insertion cylinder of this utility model.
[0023] In the figure: 1. First rubber sleeve; 11. Connecting cylinder; 12. Limiting ring; 2. Second rubber sleeve; 21. Inserting cylinder; 22. Inserting groove; 23. Annular groove; 3. Metal clamp; 4. Metal sleeve. Detailed Implementation
[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0025] Example 1: A dustproof device for a high-strength ultimate torque transmission arm, see [link / reference] Figures 1 to 4 The system includes: a disassembly and assembly mechanism, comprising a connecting cylinder 11 fixedly connected to one end of the first rubber sleeve 1 and a plug-in cylinder 21 fixedly connected to one end of the second rubber sleeve 2. The connecting cylinder 11 and the plug-in cylinder 21 are arranged opposite to each other. The plug-in cylinder 21 has a plug-in groove 22, which is circular. The connecting cylinder 11 corresponds to the plug-in groove 22. The materials of the connecting cylinder 11 and the plug-in cylinder 21 are the same as those of the first rubber sleeve 1. An installation mechanism is used for installing the first rubber sleeve 1 and the second rubber sleeve 2. The installation mechanism is a metal clamp 3, which is respectively sleeved on the outside of the first rubber sleeve 1 and the second rubber sleeve 2.
[0026] During operation, the first rubber sleeve 1 and the second rubber sleeve 2 are both fitted onto the outside of the power transmission node of the transmission arm. Then, the connecting cylinder 11 is inserted into the insertion slot 22 to connect the first rubber sleeve 1 and the second rubber sleeve 2. The first rubber sleeve 1 and the second rubber sleeve 2 are then fixed to the transmission arm by the metal clamp 3. Thus, the first rubber sleeve 1 and the second rubber sleeve 2 shield the power transmission node of the transmission arm from dust. When lubricating oil needs to be added, the connecting cylinder 11 is pulled out from the insertion slot 22, allowing lubricating oil to be added to the power transmission node of the transmission arm between the first rubber sleeve 1 and the second rubber sleeve 2. This eliminates the need to disassemble the dustproof mechanism and adds lubricating oil to the power transmission node of the transmission arm, which is convenient and improves the efficiency of lubricating oil addition. When the first rubber sleeve 1 or the second rubber sleeve 2 is damaged, since the first rubber sleeve 1 and the second rubber sleeve 2 are designed separately, only the damaged rubber sleeve needs to be replaced, instead of replacing the entire rubber sleeve. Compared with the traditional one-piece protective sleeve, the maintenance cost is reduced by more than 50%.
[0027] For details, see Figure 2 and Figure 4The outer side of the connecting cylinder 11 is fixedly connected to a limiting ring 12. Both sides of the inner cavity of the insertion groove 22 are provided with annular grooves 23. The internal dimensions of the annular grooves 23 are adapted to the external dimensions of the limiting ring 12. When the connecting cylinder 11 is inserted into the insertion groove 22, the limiting ring 12 is placed in the annular groove 23, so that the annular groove 23 can limit the limiting ring 12, thereby improving the stability of the connecting cylinder 11 inserted into the insertion groove 22, and further improving the stability of the connection between the first rubber sleeve 1 and the second rubber sleeve 2.
[0028] It is worth noting that, see Figure 2 The outer side of the connecting cylinder 11 is inlaid with a metal sleeve 4. The metal sleeve 4 is used to increase the strength of the connecting cylinder 11, thereby facilitating the quick insertion of the connecting cylinder 11 into the insertion groove 22 and improving the connection efficiency of the first rubber sleeve 1 and the second rubber sleeve 2.
[0029] It is worth noting that, see Figure 2 and Figure 4 The distance from the bottom of the inner cavity of the insertion groove 22 to the annular groove 23 is the same as the distance from the bottom of the first rubber sleeve 1 to the limiting ring 12. When the bottom of the connecting cylinder 11 contacts the bottom of the inner cavity of the insertion groove 22, the limiting ring 12 is ensured to correspond to the annular groove 23, further ensuring that the limiting ring 12 can be smoothly engaged in the annular groove 23.
[0030] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.
[0031] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.
Claims
1. A dustproof device for a high-strength ultimate torque transmission arm, characterized in that, include: The disassembly and assembly mechanism includes a connecting cylinder (11) fixedly connected to one end of the first rubber sleeve (1) and a plug-in cylinder (21) fixedly connected to one end of the second rubber sleeve (2). The connecting cylinder (11) and the plug-in cylinder (21) are arranged opposite to each other. The plug-in cylinder (21) is provided with a plug-in groove (22). The plug-in groove (22) is circular. The connecting cylinder (11) corresponds to the plug-in groove (22). The mounting mechanism is used for mounting the first rubber sleeve (1) and the second rubber sleeve (2).
2. The dustproof device for a high-strength ultimate torque transmission arm as described in claim 1, characterized in that, A limiting ring (12) is fixedly connected to the outside of the connecting cylinder (11). An annular groove (23) is provided on both sides of the inner cavity of the insertion groove (22). The internal dimensions of the annular groove (23) are adapted to the external dimensions of the limiting ring (12).
3. The dustproof device for a high-strength ultimate torque transmission arm as described in claim 1, characterized in that, The installation mechanism is a metal clamp (3), which is respectively fitted on the outside of the first rubber sleeve (1) and the second rubber sleeve (2).
4. The dustproof device for a high-strength ultimate torque transmission arm as described in claim 1, characterized in that, A metal sleeve (4) is inlaid on the outside of the connecting cylinder (11).
5. The dustproof device for a high-strength ultimate torque transmission arm as described in claim 2, characterized in that, The distance from the bottom of the inner cavity of the insertion groove (22) to the annular groove (23) is the same as the distance from the bottom of the first rubber sleeve (1) to the limiting ring (12).
6. The dustproof device for a high-strength ultimate torque transmission arm as described in claim 1, characterized in that, The materials of the connecting cylinder (11) and the plug-in cylinder (21) are the same as those of the first rubber sleeve (1).