Wear-resistant universal joint pin universal coupling

Abstract

The utility model discloses a wear-resistant cross shaft universal coupling which comprises two first universal joints and a first universal shaft which are oppositely arranged, the opposite ends of the two first universal joints are both provided with fixing seats, and the opposite ends of the two fixing seats are fixedly connected with a limiting shaft sleeve and a limiting shaft core respectively. The limiting shaft sleeve and the limiting shaft core are in sliding connection, a buffer spring is arranged outside the limiting shaft sleeve and the limiting shaft core, the two ends of the buffer spring are fixedly installed on the corresponding fixing bases respectively, a threaded groove is formed in the outer side wall of the limiting shaft sleeve, and the limiting shaft sleeve is in threaded connection with an adjusting check block through the threaded groove; the buffering spring is arranged outside the limiting shaft sleeve and the limiting shaft core, and the adjustable adjusting stop block is matched, so that the elastic coefficient of the buffering spring can be flexibly adjusted according to actual working conditions, abrasion caused by vibration and impact in the transmission process of the coupler is effectively reduced, and the service life of the coupler is prolonged. And the adaptability under complex working conditions is also enhanced.

Description

Technical Field

[0001] This utility model relates to the field of universal coupling technology, specifically a wear-resistant cross shaft universal coupling. Background Technology

[0002] Universal joints with cross shafts are widely used in many mechanical transmission fields, such as automobiles, construction machinery, metallurgical equipment, mining machinery, and ships. Their main principle is to transmit power from the driving shaft to the driven shaft through the cooperation of the cross shaft and the fork head, realizing power transmission and motion conversion between the two shafts. They can adapt to changes in the included angle between the two shafts, thus ensuring the normal operation of the mechanical system under complex spatial layouts and motion conditions.

[0003] The common feature of existing universal couplings is their large angular compensation, which gives them a unique advantage in multi-section coupling transmission applications. Utilizing the characteristics of their mechanism, the two connected sections can achieve continuous rotation and reliably transmit torque and motion. However, in some special applications requiring multi-section couplings for transmission, problems gradually emerge as the number of couplings increases. Couplings near the middle experience greater losses during transmission, mainly because they bear the complex forces and friction from multiple coupling sections. Simultaneously, their own wear is also more severe. This wear not only reduces the transmission efficiency of the coupling but also leads to a decrease in the stability and reliability of equipment operation, increasing maintenance costs and the risk of failure, thus limiting their further application in situations with high reliability and lifespan requirements.

[0004] Therefore, a wear-resistant universal joint is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a wear-resistant universal joint to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a wear-resistant universal joint, comprising two oppositely arranged first universal joints and a first universal shaft. A fixed seat is mounted on one opposite end of each of the two first universal joints. A limiting sleeve and a limiting shaft core are respectively fixedly connected to opposite ends of the two fixed seats, and the limiting sleeve and the limiting shaft core are slidably connected. A buffer spring is provided on the outside of both the limiting sleeve and the limiting shaft core. Both ends of the buffer spring are fixedly mounted on corresponding fixed seats. A threaded groove is provided on the outer wall of the limiting sleeve. An adjusting block is threadedly connected to the limiting sleeve through the threaded groove. Rotating the adjusting block adjusts the elastic coefficient of the buffer spring.

[0007] Preferably, the adjusting block and the buffer spring are rotatably connected at opposite ends, and the limiting shaft is slidably installed inside the limiting bushing.

[0008] Preferably, the outer side wall of the adjusting block has multiple adjusting holes evenly distributed circumferentially to facilitate the control of the adjusting block's rotation.

[0009] Preferably, a locking hole is provided on the fixed seat near the adjusting block, and a matching locking rod is provided inside the locking hole. The locking rod passes through the adjusting block and is threaded into the inside of the locking hole. The locking rod is used to lock the position of the adjusting block after adjustment.

[0010] Preferably, both the limiting bushing and the limiting shaft core are electroplated with hard chrome, and the outer walls of both the limiting bushing and the limiting shaft core are provided with a wear-resistant layer. The wear-resistant layer is made of PVD or CVD coating material to further improve the hardness of the parts.

[0011] Preferably, the two first universal joints are respectively hinged to the interior of the corresponding first universal joints, and the outer walls of the two first universal joints are each hinged to a second universal joint. The opposite ends of the two second universal joints are each fixedly connected to a flange, and the interior of the two flanges is provided with multiple mounting holes.

[0012] Preferably, both flanges are provided with elastic pads on opposite sides of their surfaces, and both elastic pads are made of highly wear-resistant rubber material.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This wear-resistant universal joint features a buffer spring installed on the outside of the limiting sleeve and the limiting shaft core, along with an adjustable adjustment block. This allows for flexible adjustment of the spring's elastic coefficient according to actual working conditions. This not only effectively reduces wear caused by vibration and impact during transmission but also enhances its adaptability to complex working conditions.

[0015] Meanwhile, the limiting bushing and limiting shaft core are electroplated with hard chrome and have a wear-resistant layer made of PVD or CVD coating material, which significantly improves the hardness and wear resistance of the parts, greatly reduces the wear rate during transmission, thereby effectively extending the service life of the coupling, improving the stability and reliability of equipment operation, and reducing equipment maintenance costs and failure risks.

[0016] 2. The coupling features a flange design with multiple mounting holes inside, facilitating quick connection and disassembly with different equipment, thus improving the coupling's versatility and installation efficiency.

[0017] In addition, the elastic pads on the flanges are made of highly wear-resistant rubber material, which can effectively buffer impact forces during transmission, reduce vibration transmission, and optimize transmission performance. Moreover, the elastic pads can also compensate for minor displacements and deviations between the coupling and the connecting parts to a certain extent, ensuring the smoothness and accuracy of transmission. This allows the coupling to better perform its transmission function under the special requirements of multi-section coupling transmission, meeting the transmission requirements of complex mechanical systems. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0019] Figure 2 This is a partial exploded structural diagram of the present invention.

[0020] In the diagram: 1. First universal joint; 2. First universal shaft; 3. Fixed seat; 4. Limiting bushing; 5. Limiting shaft core; 6. Buffer spring; 7. Threaded groove; 8. Adjusting stop; 9. Locking rod; 10. Adjusting hole; 11. Locking hole; 12. Wear-resistant layer; 13. Second universal joint; 14. Flange; 15. Mounting hole; 16. Elastic pad. Detailed Implementation

[0021] 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.

[0022] Example 1: Please refer to Figure 1-2 This utility model provides a technical solution: a wear-resistant universal joint, including two oppositely arranged first universal joints 1 and first universal shafts 2. Each of the two first universal joints 1 has a fixed seat 3 installed at one opposite end. The two fixed seats 3 are respectively fixedly connected to a limiting sleeve 4 and a limiting core 5 at their opposite ends, and are slidably connected. A buffer spring 6 is provided on the outside of both the limiting sleeve 4 and the limiting core 5. The two ends of the buffer spring 6 are respectively fixedly installed on the corresponding fixed seats 3. A threaded groove 7 is provided on the outer wall of the limiting sleeve 4. An adjusting block 8 is threadedly connected to the limiting sleeve 4 through the threaded groove 7. By rotating the adjusting block 8 along the outer wall of the limiting sleeve 4, it moves to one side, thereby pushing the buffer spring 6 at one end to contract or extend. This allows for adjustment according to actual processing requirements, thereby adjusting the elastic coefficient of the buffer spring 6. Combined with the real-time adjustment of the limiting core 5 and the limiting sleeve 4 according to the magnitude of the force, this improves the adaptability to the processing environment.

[0023] The adjusting block 8 and the buffer spring 6 are rotatably connected at opposite ends. With the rotatable connection, the frictional resistance between the adjusting block 8 and the buffer spring 6 can be reduced, which facilitates actual adjustment. The limiting shaft core 5 is slidably installed inside the limiting shaft sleeve 4.

[0024] In this embodiment, the outer side wall of the adjusting block 8 is evenly distributed with multiple adjusting holes 10 in the circumferential direction, which facilitates the control of the adjusting block 8 to rotate.

[0025] A locking hole 11 is provided on the fixed base 3 near the adjusting block 8. A matching locking rod 9 is provided inside the locking hole 11. The locking rod 9 passes through the adjusting block 8 and is threaded into the inside of the locking hole 11. The locking rod 9 is used to lock the position of the adjusting block 8 after adjustment.

[0026] In this embodiment, both the limiting bushing 4 and the limiting shaft core 5 are electroplated with hard chrome. The outer walls of both the limiting bushing 4 and the limiting shaft core 5 are provided with a wear-resistant layer 12, which is made of PVD or CVD coating material to further improve the hardness of the parts.

[0027] In this embodiment, two first universal shafts 2 are respectively hinged to the inside of the corresponding first universal joint 1. The outer walls of the two first universal shafts 2 are each hinged to a second universal joint 13. The opposite ends of the two second universal joints 13 are each fixedly connected to a flange 14. The interior of the two flanges 14 is provided with a plurality of mounting holes 15.

[0028] Both flanges 14 are provided with elastic pads 16 on opposite sides of their surfaces, and both elastic pads 16 are made of highly wear-resistant rubber material.

[0029] The working principle is as follows: This wear-resistant universal joint mainly consists of two oppositely arranged first universal joints 1, first universal shafts 2, fixed seats 3, limiting sleeves 4, limiting shaft cores 5, and buffer springs 6. During transmission, the drive shaft drives the first universal joints 1 and first universal shafts 2 to rotate. The power is transmitted to the driven shaft through the cross shaft and fork head, realizing power transmission and motion conversion between the two shafts. The limiting sleeves 4 and limiting shaft cores 5 are slidably connected, and buffer springs 6 are provided on their exterior. The two ends of the buffer springs 6 are fixed on the corresponding fixed seats 3. When impact loads or axial displacement occur during transmission, the limiting shaft cores 5 slide in the limiting sleeves 4, and the buffer springs 6 are compressed or extended accordingly, thereby absorbing impact energy, reducing the impact force on the coupling, and reducing wear. At the same time, the limiting sleeves 4 are threadedly connected to the adjusting block 8 through the threaded groove 7. Rotating the adjusting block 8 can adjust the elastic coefficient of the buffer springs 6 to adapt to different working conditions.

[0030] In addition, both the limiting bushing 4 and the limiting shaft core 5 are electroplated with hard chrome, and the outer wall is provided with a wear-resistant layer 12 to further improve the hardness and wear resistance of the parts and reduce wear during transmission. The two first universal joints 2 are respectively hinged to the inside of the corresponding first universal joint 1, and their outer walls are hinged to the second universal joint 13. The opposite end of the second universal joint 13 is fixedly connected to the flange 14. The flange 14 has multiple mounting holes 15 inside to facilitate connection with different equipment. The opposite side surface of the flange 14 is provided with an elastic pad 16. The elastic pad 16 is made of high wear-resistant rubber material, which can buffer impact force, reduce vibration transmission, compensate for small displacements and deviations between the coupling and the connecting parts, and ensure smooth and accurate transmission.

[0031] 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 wear-resistant universal joint, comprising two opposing first universal joints (1) and first universal shafts (2), characterized in that: Each of the two first universal joints (1) is equipped with a fixed seat (3) at one end. The two fixed seats (3) are respectively fixedly connected to a limiting sleeve (4) and a limiting shaft core (5), and the limiting sleeve (4) and the limiting shaft core (5) are slidably connected. The limiting sleeve (4) and the limiting shaft core (5) are provided with a buffer spring (6) on their exterior. The two ends of the buffer spring (6) are respectively fixedly installed on the corresponding fixed seat (3). The outer side wall of the limiting sleeve (4) is provided with a threaded groove (7). The limiting sleeve (4) is threadedly connected to an adjusting block (8) through the threaded groove (7). Rotating the adjusting block (8) can adjust the elastic coefficient of the buffer spring (6).

2. The wear-resistant universal joint according to claim 1, characterized in that: The adjusting stop (8) and the buffer spring (6) are rotatably connected at opposite ends, and the limiting shaft core (5) is slidably installed inside the limiting bushing (4).

3. The wear-resistant universal joint according to claim 1, characterized in that: The outer side wall of the adjusting block (8) is evenly distributed with multiple adjusting holes (10) in the circumferential direction, which facilitates the control of the adjusting block (8) to rotate.

4. The wear-resistant universal joint according to claim 3, characterized in that: A locking hole (11) is provided on the fixing seat (3) near the adjusting block (8). A matching locking rod (9) is provided inside the locking hole (11). The locking rod (9) passes through the adjusting block (8) and is threaded into the inside of the locking hole (11). The locking rod (9) is used to lock the position of the adjusting block (8) after adjustment.

5. The wear-resistant universal joint according to claim 1, characterized in that: Both the limiting bushing (4) and the limiting shaft core (5) are electroplated with hard chrome. The outer walls of both the limiting bushing (4) and the limiting shaft core (5) are provided with a wear-resistant layer (12). The wear-resistant layer (12) is made of PVD or CVD coating material to further improve the hardness of the parts.

6. The wear-resistant universal joint according to claim 1, characterized in that: The two first universal joints (2) are respectively hinged to the inside of the corresponding first universal joint (1). The outer walls of the two first universal joints (2) are hinged to the second universal joints (13). The opposite ends of the two second universal joints (13) are fixedly connected to the flanges (14). The two flanges (14) are provided with multiple mounting holes (15).

7. A wear-resistant universal joint according to claim 6, characterized in that: Both flanges (14) have elastic pads (16) on opposite sides of their surfaces, and both elastic pads (16) are made of highly wear-resistant rubber material.

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