Cross universal coupling with protective structure

Abstract

The utility model discloses a cross-shaped universal coupling with a protective structure. The cross-shaped universal coupling comprises an upper coupling, a side plate A and a buffer pad, a lower coupler is arranged on one side of the upper coupler, and an upper shell and a lower shell are arranged on the outer sides of the upper coupler and the lower coupler respectively; the side plate A is arranged on the surface of the upper shell; through the design of the upper shell and the lower shell, the upper coupler and the lower coupler are wrapped in the upper shell and the lower shell in cooperation with the installation mechanism, the physical protection effect on the upper coupler and the lower coupler is achieved, and the upper coupler and the lower coupler can be prevented from being collided and scraped by external objects in the using process; the influence on the transmission precision and the service life of the upper coupling and the lower coupling due to surface damage and deformation caused by accidental collision is avoided; by means of the buffer cushion, the stability of equipment operation is greatly enhanced, in the transmission process of the coupler, mechanical vibration and impact force are inevitable, and the buffer cushion can effectively absorb the vibration and the impact force.

Description

Technical Field

[0001] This utility model relates to the technical field of universal joints, specifically a universal joint with a protective structure. Background Technology

[0002] A universal joint (also known as a cross shaft universal joint) is a mechanical component used to connect two shafts. Its purpose is to transmit rotational motion and torque between the two shafts. It is characterized by its ability to provide large angular compensation between the two shafts and is mainly used in applications where angle adjustment is required or where there is relative motion between the shafts.

[0003] Among related technologies, a solution for a wear-resistant cross-shaft universal coupling (publication number: CN219510041U) was found. In use, the first and second wear-resistant layers, along with the sliding block on the outer wall of the connecting shaft and the sliding groove at the contact point between the sliding block and the bushing, create a sliding connection between the connecting shaft and the bushing. Therefore, adjusting the length of the connecting shaft and bushing reduces the friction range between them, decreasing wear caused by friction. Furthermore, the wear-resistant layer applied to both the outer wall of the connecting shaft and the inner wall of the bushing improves their wear resistance, thereby reducing wear during use and extending their service life.

[0004] However, the connecting shaft and bushing of the aforementioned universal joint do not have a protective structure during use and are directly exposed to the outside, making them extremely susceptible to collisions and scratches from external objects. For example, in some industrial production environments, debris generated by surrounding equipment operation or unintentional contact with tools can cause scratches, dents, and other damage to the surface of the coupling. These surface damages can compromise the structural integrity of the coupling, thereby affecting its transmission accuracy, causing deviations in power transmission, and reducing the stability and reliability of equipment operation.

[0005] In light of this, we have introduced a universal joint with a protective structure. Utility Model Content

[0006] The purpose of this invention is to provide a universal joint with a protective structure to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a universal joint with a protective structure, comprising: an upper coupling, a side plate A, and a buffer pad;

[0008] A lower coupling is provided on one side of the upper coupling, and an upper housing and a lower housing are respectively provided on the outer sides of the upper coupling and the lower coupling;

[0009] The side plate A is disposed on the surface of the upper shell and is fixedly disposed therebetween. The side plate B is disposed on one side of the surface of the lower shell and is fixedly disposed therebetween.

[0010] The buffer pad is disposed inside the upper and lower housings. The buffer pad is in contact with the surfaces of the upper and lower couplings. The buffer pad is in close contact with the surfaces of the upper and lower couplings, which can effectively absorb the vibration and impact force generated by the upper and lower couplings during operation. The buffer pad itself has a certain elasticity and will deform when compressed, converting mechanical energy into elastic potential energy for storage, and then slowly releasing it, thereby reducing the vibration impact on the upper and lower couplings and other equipment components, and ensuring the stability of equipment operation.

[0011] An installation mechanism is provided between side plate A and side plate B. The spring of the installation mechanism drives the moving block and the plug block to be inserted into the interior of side plate B so that the upper and lower housings protect the upper and lower couplings.

[0012] Preferably, the installation mechanism includes a positioning pin connecting side plate A and side plate B. A positioning frame is hinged to one side of the positioning pin. When the positioning frame is perpendicular to the positioning pin, the positioning pin and the positioning frame can be pulled out from between side plate A and side plate B. A spring is connected to the inner side of the positioning frame. A moving block is connected inside the positioning frame and located on one side of the spring. The upper and lower ends of the moving block contact the inner sidewall of the positioning frame to form a limit. A plug-in block is connected to one side of the moving block. The moving block and the plug-in block are fixedly set together. The plug-in block passes through the positioning frame, and one end of the plug-in block is inserted into the interior of side plate B. A pull plate is connected to the surface of the plug-in block. The pull plate and the plug-in block are fixedly set together.

[0013] Preferably, the surface of the positioning pin is connected to a rotating shaft, which passes through the positioning pin and the positioning frame. The rotating shaft allows the positioning frame to rotate inside the positioning pin.

[0014] Preferably, the side plate B has an insertion groove for inserting the insertion block inside, and the insertion groove and the side plate B are integrally formed.

[0015] Preferably, a through pipe is connected to the surface of the upper housing, a nut is screwed onto the surface of the through pipe, and an external thread is connected to the surface of the through pipe. An internal thread is provided on the inner side of the nut, and the internal thread matches and engages with the external thread. The through pipe and the nut screwed onto its surface have special uses. The through pipe can serve as an oil injection channel when it is necessary to lubricate and maintain the rotating parts inside the coupling (upper coupling and lower coupling).

[0016] Preferably, the upper coupling and the lower coupling are connected by bolts, which connect the upper coupling and the lower coupling together to ensure the stability between them and enable the power to be effectively transmitted between them.

[0017] Preferably, the surface of the positioning pin is provided with a through groove for passing through the rotating shaft, and the through groove and the positioning pin are integrally formed.

[0018] Preferably, the upper coupling and the lower coupling are connected to the sides with welded forks, and the inside of the welded forks is provided with flange forks through a cross shaft. A flange is connected to one side of the flange forks, and the flange can be connected to other equipment components (such as drive shafts, working machinery, etc.) to transmit power to subsequent equipment, thereby realizing the power transmission and operation of the entire mechanical system.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] (1) The design of the upper and lower housings, together with the installation mechanism, encloses the upper and lower couplings, providing physical protection for them. This prevents the upper and lower couplings from being hit or scratched by external objects during use, avoiding damage or deformation to their surfaces due to accidental collisions, which would affect their transmission accuracy and service life. At the same time, it also prevents dust, oil, water vapor and other impurities from entering the upper and lower couplings, reducing corrosion and wear of internal parts, ensuring the cleanliness of the upper and lower couplings and maintaining their good working condition.

[0021] (2) The presence of buffer pads greatly enhances the stability of equipment operation. During the transmission process of couplings, mechanical vibration and impact are inevitable. Buffer pads can effectively absorb these vibrations and impacts, reducing the impact on the coupling itself and the connected equipment components. This can not only reduce the noise generated during equipment operation and improve the comfort of the working environment, but also avoid problems such as loosening of equipment parts and breakage of connection parts due to excessive vibration, extend the overall service life of the equipment, and improve the reliability and safety of the equipment.

[0022] (3) Through the structural design of welding fork head, cross shaft and flange fork head, the coupling can realize the smooth transmission of power at different angles. In some complex mechanical transmission systems, there may be a certain angle deviation between the driving shaft and the driven shaft. The universal joint can effectively adapt to this angle change, ensure the continuous and stable transmission of power, and will not cause the transmission efficiency to drop or jam due to angle problems. This broadens the application range of the coupling, enabling it to play a role in more types of mechanical equipment, such as automobile transmission system, industrial robotic arm, etc. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a side view of the structure of this utility model;

[0025] Figure 3 This is a schematic diagram of the side section of side plate A and side plate B of this utility model;

[0026] Figure 4 This is a side sectional structural diagram of the upper and lower shells of this utility model.

[0027] In the diagram: 1. Upper housing; 2. Lower housing; 3. Upper coupling; 4. Welded fork head; 5. Flange fork head; 6. Flange; 7. Cross shaft; 8. Side plate A; 9. Side plate B; 10. Locating pin; 11. Nut; 12. Through pipe; 13. Locating frame; 14. Spring; 15. Moving block; 16. Insertion block; 17. Pull plate; 18. Insertion groove; 19. Rotating shaft; 20. Through groove; 21. Lower coupling; 22. Bolt; 23. Buffer pad. Detailed Implementation

[0028] 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.

[0029] Please see Figure 1-4 This utility model provides a technical solution: a universal joint with a protective structure, comprising: an upper coupling 3, a lower coupling 21 provided on one side of the upper coupling 3, and an upper housing 1 and a lower housing 2 respectively provided on the outer sides of the upper coupling 3 and the lower coupling 21.

[0030] Side plate A8 is disposed on the surface of the upper housing 1, and side plate B9 is disposed on one side of the surface of the lower housing 2;

[0031] A buffer pad 23 is disposed on the inner side of the upper housing 1 and the lower housing 2, and the buffer pad 23 is in contact with the surfaces of the upper coupling 3 and the lower coupling 21.

[0032] An installation mechanism is provided between the side plate A8 and the side plate B9. The spring 14 of the installation mechanism drives the moving block 15 and the plug block 16 to be inserted into the interior of the side plate B9, so that the upper housing 1 and the lower housing 2 protect the upper coupling 3 and the lower coupling 21.

[0033] The installation mechanism includes a positioning pin 10 connecting side plate A8 and side plate B9. A positioning frame 13 is hinged to one side of the surface of the positioning pin 10. When the positioning frame 13 and the positioning pin 10 are perpendicular, the positioning pin 10 and the positioning frame 13 can be pulled out from between side plate A8 and side plate B9. The spring 14 is connected to the inner side of the positioning frame 13. The moving block 15 is connected to the inside of the positioning frame 13 and located on one side of the spring 14. The upper and lower ends of the moving block 15 contact the inner sidewall of the positioning frame 13 respectively to form a limit. The insertion block 16 is connected to one side of the moving block 15. The moving block 15 and the insertion block 16 are fixedly set together. The insertion block 16 passes through the positioning frame 13, and one end of the insertion block 16 is inserted into the inside of the side plate B9. A pull plate 17 is connected to the surface of the insertion block 16. The pull plate 17 and the insertion block 16 are fixedly set together.

[0034] The surface of the positioning pin 10 is connected to a rotating shaft 19, which passes through the positioning pin 10 and the positioning frame 13. The rotating shaft 19 allows the positioning frame 13 to rotate inside the positioning pin 10.

[0035] The side plate B9 has an insertion groove 18 for inserting the insertion block 16, and the insertion groove 18 and the side plate B9 are integrally formed.

[0036] The surface of the upper housing 1 is connected to a through pipe 12, and a nut 11 is screwed onto the surface of the through pipe 12. The surface of the through pipe 12 is connected to an external thread, and the inner side of the nut 11 is provided with an internal thread, which matches and engages with the external thread. The through pipe 12 and the nut 11 screwed onto its surface have special uses. The through pipe 12 can be used as an oil injection channel when it is necessary to lubricate and maintain the rotating parts inside the coupling (upper coupling 3 and lower coupling 21).

[0037] The upper coupling 3 and the lower coupling 21 are connected by bolts 22, which connect the upper coupling 3 and the lower coupling 21 together to ensure the stability between the two and enable the power to be effectively transmitted between them.

[0038] The surface of the positioning pin 10 is provided with a through groove 20 for passing through the rotating shaft 19, and the through groove 20 and the positioning pin 10 are integrally formed.

[0039] The upper coupling 3 and the lower coupling 21 are connected to the sides by welded fork heads 4, and the inside of the welded fork head 4 is rotatably provided with a flange fork head 5 through a cross shaft 7. A flange 6 is connected to one side of the flange fork head 5. The flange 6 can be connected to other equipment components (such as drive shafts, working machinery, etc.) to transmit power to subsequent equipment, thereby realizing the power transmission and operation of the entire mechanical system.

[0040] Specifically, during use, when installing the universal joint with protective structure, first connect the upper coupling 3 and the lower coupling 21 together with bolts 22 to ensure their stability and allow for effective power transmission. Next, fit the upper housing 1 and the lower housing 2 onto the outside of the upper coupling 3 and the lower coupling 21 respectively. At this point, side plate A8 and side plate B9 correspond, and the installation mechanism begins to function. The positioning pin 10, as the basic support component of the installation mechanism, is connected between side plate A8 and side plate B9. The positioning frame 13 is connected via the rotating shaft 19. The spring 14, hinged to the surface of the positioning pin 10 and inside the positioning frame 13, is in a naturally extended or pre-compressed state. When the upper housing 1 and the lower housing 2 are pushed close together, the spring 14 pushes the moving block 15. The moving block 15 drives the insertion block 16 to move towards the side plate B9. Finally, the insertion block 16 is inserted into the insertion groove 18 inside the side plate B9, thereby fixing the upper housing 1 and the lower housing 2 together and protecting the coupling. If disassembly is required, pull the pull plate 17. The pull plate 17 drives the insertion block 16 to disengage from the insertion groove 18, thus separating the upper housing 1 and the lower housing 2.

[0041] During equipment operation, the upper coupling 3 and the lower coupling 21 will generate vibration and impact forces due to mechanical transmission. At this time, the buffer pad 23 set inside the upper housing 1 and the lower housing 2 plays an important role. The buffer pad 23 is in close contact with the surfaces of the upper coupling 3 and the lower coupling 21, which can effectively absorb the vibration and impact forces generated by the upper coupling 3 and the lower coupling 21 during operation. The buffer pad 23 itself has a certain elasticity and will deform when squeezed, converting mechanical energy into elastic potential energy and storing it, and then slowly releasing it, thereby reducing the vibration impact on the upper coupling 3, the lower coupling 21 and other equipment components, and ensuring the stability of equipment operation.

[0042] This universal joint mainly achieves power transmission through the welded fork head 4, the cross shaft 7, and the flange fork head 5. The upper coupling 3 and the lower coupling 21 are connected to the side of the welded fork head 4. The flange fork head 5 is rotatably installed inside the welded fork head 4 through the cross shaft 7. When the upper coupling 3 starts to rotate, it drives the welded fork head 4 to rotate synchronously. The rotation of the welded fork head 4 is transmitted to the flange fork head 5 through the cross shaft 7. Due to the special structure of the cross shaft 7, it can transmit force at different angles, so that the flange fork head 5 can rotate with the rotation of the welded fork head 4 within a certain angle range. A flange 6 is connected to one side of the flange fork head 5. The flange 6 can be connected to other equipment components (such as drive shafts, working machinery, etc.) to transmit power to downstream equipment and realize the power transmission and operation of the entire mechanical system.

[0043] The through pipe 12 connected to the surface of the upper housing 1 and the nut 11 screwed onto its surface have special purposes. The through pipe 12 can serve as an oil injection channel. When it is necessary to lubricate and maintain the rotating parts inside the coupling (upper coupling 3 and lower coupling 21), lubricating oil is injected into the upper coupling 3 and lower coupling 21 through the through pipe 12. After the injection is completed, the nut 11 is tightened. The nut 11 acts as a seal to prevent lubricating oil leakage. It also prevents external dust, impurities and other foreign objects from entering the upper coupling 3 and lower coupling 21 through the through pipe 12, which would affect their normal operation and service life.

[0044] 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 universal joint with a protective structure, characterized in that, include: An upper coupling (3) is provided on one side of the upper coupling (3), and an upper housing (1) and a lower housing (2) are respectively provided on the outer sides of the upper coupling (3) and the lower coupling (21). Side plate A (8) is provided on the surface of the upper shell (1), and side plate B (9) is provided on one side of the surface of the lower shell (2); A buffer pad (23) is provided on the inner side of the upper housing (1) and the lower housing (2), and the buffer pad (23) is in contact with the surfaces of the upper coupling (3) and the lower coupling (21); An installation mechanism is provided between the side plate A (8) and the side plate B (9). The spring (14) of the installation mechanism drives the moving block (15) and the plug block (16) to be inserted into the interior of the side plate B (9) so that the upper housing (1) and the lower housing (2) protect the upper coupling (3) and the lower coupling (21).

2. The universal joint with protective structure according to claim 1, characterized in that, The installation mechanism includes a positioning pin (10) connecting side plate A (8) and side plate B (9). A positioning frame (13) is hinged to one side of the surface of the positioning pin (10). A spring (14) is connected to the inside of the positioning frame (13). A moving block (15) is connected inside the positioning frame (13) and located on one side of the spring (14). A plug-in block (16) is connected to one side of the moving block (15), and one end of the plug-in block (16) is inserted into the inside of side plate B (9). A pull plate (17) is connected to the surface of the plug-in block (16).

3. A universal joint with a protective structure according to claim 2, characterized in that, The surface of the positioning pin (10) is connected to a rotating shaft (19), which passes through the positioning pin (10) and the positioning frame (13).

4. A universal joint with a protective structure according to claim 2, characterized in that, The side plate B (9) has an insertion slot (18) for inserting the insertion block (16).

5. A universal joint with a protective structure according to claim 1, characterized in that, The surface of the upper housing (1) is connected to a through pipe (12), and a nut (11) is screwed onto the surface of the through pipe (12).

6. A universal joint with a protective structure according to claim 1, characterized in that, The upper coupling (3) and the lower coupling (21) are connected by bolts (22).

7. A universal joint with a protective structure according to claim 3, characterized in that, The surface of the positioning pin (10) is provided with a through groove (20) for passing through the rotating shaft (19).

8. A universal joint with a protective structure according to claim 1, characterized in that, The upper coupling (3) and the lower coupling (21) are connected to the sides by a welded fork (4), and the inside of the welded fork (4) is rotatably provided with a flange fork (5) through a cross shaft (7), and a flange (6) is connected to one side of the flange fork (5).

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