High-torque-bearing cross shaft universal joint

Abstract

The utility model discloses a cross shaft universal joint with high torque bearing capacity, and belongs to the technical field of universal joints. Comprising a universal joint body and a shaft body, the universal joint body comprises a pair of universal joint forks and a cross shaft, the four ends of the cross shaft are connected with the universal joint forks respectively, fixing grooves are formed in the sides, away from each other, of the universal joint forks, four sets of clamping grooves are formed in the wall faces of the fixing grooves at equal intervals, and cross fixing pieces are arranged in the fixing grooves; the shaft body comprises a pair of rotating shafts, the pair of rotating shafts are fixed in the pair of fixing grooves through cross fixing pieces respectively, four sets of pins are distributed on the outer sides of the rotating shafts in the circumferential direction at equal intervals, and the pins are clamped with the clamping grooves; according to the cross shaft universal joint applied to high torque bearing, the problems that under the high torque working condition of a traditional cross shaft universal joint, the connecting structure of the universal joint and the input and output shafts is weak, the connecting part is prone to loosening, and the transmission stability and reliability are affected can be solved.

Description

Technical Field

[0001] This utility model relates to the field of universal joint technology, specifically a cross-shaft universal joint with high torque capacity. Background Technology

[0002] In various mechanical transmission systems, the universal joint is a crucial power transmission component, widely used in automobiles, construction machinery, and ships. With the development of modern industry, the demands on the power performance of mechanical equipment are constantly increasing, requiring universal joints to withstand greater torque. However, the traditional universal joint structure has several shortcomings when facing high torque conditions. For example, the connection structure between the universal joint and the input / output shafts is relatively weak; under high torque impact, the connection is prone to loosening, affecting the stability and reliability of the transmission. Therefore, it is necessary to optimize the structure of the universal joint to improve its torque-carrying capacity. Utility Model Content

[0003] The purpose of this invention is to provide a cross-shaft universal joint with high torque capacity to solve the problems mentioned in the background art.

[0004] In view of the above problems, the technical solution proposed by this utility model is as follows:

[0005] A high-torque-carrying universal joint includes a universal joint body and a shaft.

[0006] Furthermore, the universal joint body includes a pair of universal joint forks and a cross shaft. The four ends of the cross shaft are respectively connected to the pair of universal joint forks. Fixing grooves are formed on the opposite sides of the universal joint forks. Four sets of slots are evenly spaced on the wall of each fixing groove. Cross fixing members are provided inside the fixing groove. The shaft body includes a pair of rotating shafts. The pair of rotating shafts are respectively fixed in the pair of fixing grooves by the cross fixing members. Four sets of pins are evenly distributed on the outer circumference of each rotating shaft. The pins engage with the slots. The engagement of the pins with the slots and the use of the cross fixing members make the connection between the rotating shaft and the universal joint forks more stable, effectively improving the load-bearing capacity of the universal joint under high torque and reducing the possibility of loosening of the connection parts.

[0007] Furthermore, the cross fastener includes a first bolt and a second bolt, with the second bolt passing through the first bolt to form a cross shape. The outer side of the universal joint fork has a first threaded hole and a second threaded hole that connect to the fixing groove. The outer side of the rotating shaft has a first through hole and a second through hole. The first bolt passes through the first through hole and is threadedly engaged with the first threaded hole. The second bolt passes through the second through hole and is threadedly engaged with the second threaded hole. This cross-shaped bolt fixing method, compared with the traditional single bolt connection, can tighten the rotating shaft from different directions, enhancing the stability of the connection. Under high torque, it can better prevent the rotating shaft from shifting or loosening.

[0008] Furthermore, the diameter of the first bolt is larger than that of the second bolt, and an opening is provided on the outer side of the first bolt, through which the second bolt passes. The diameter of the first through hole is larger than that of the second through hole, and the first and second through holes are connected. The connection point of the first and second bolts is located at the connection point of the first and second through holes, so that the two bolts fit tightly together after installation. The larger diameter of the first bolt provides the main fastening force, and the second bolt passing through the opening of the first bolt further enhances the reliability of the connection. At the same time, the design of through holes with different diameters is adapted to the bolts, ensuring the accuracy and stability of bolt installation.

[0009] Furthermore, of the pair of shafts, one is an output shaft and the other is an input shaft.

[0010] Furthermore, each of the two universal joint forks has a mounting groove at one end close to the other, and a connecting hole is formed on the wall of each mounting groove. Needle roller bearings are installed at all four ends of the cross shaft, and the needle roller bearings are embedded in the connecting holes. The use of needle roller bearings can reduce the friction between the cross shaft and the universal joint fork, improve the transmission efficiency, and make the cross shaft more stable during rotation, which helps the universal joint to operate stably under high torque conditions.

[0011] Furthermore, the space between the cross shaft and the connecting hole is filled with sealant. The presence of sealant can effectively prevent dust, impurities, etc. from entering the gap between the cross shaft and the connecting hole, avoiding wear caused by impurities that could affect the performance and lifespan of the universal joint, and ensuring the reliability of the universal joint in complex working environments.

[0012] Furthermore, the outer side of the universal joint fork is provided with countersunk holes that communicate with the first threaded hole and the second threaded hole, respectively. The screw heads of the first bolt and the second bolt are located in the countersunk holes. The design of the countersunk holes ensures that the screw heads do not protrude from the surface of the universal joint fork. On the one hand, this can prevent the screw heads from being damaged by collisions during operation. On the other hand, it also makes the overall structure of the universal joint more compact and reduces the safety hazards caused by protruding parts.

[0013] Compared with existing technologies, the beneficial effects of this invention are as follows: This high-torque-bearing universal joint, through its connection structure design, effectively solves the problem of loosening at the connection points of traditional universal joints under high-torque conditions. The synergistic effect of multiple fastening and stabilizing structures enables it to withstand greater torque, improving the stability and reliability of the transmission. Simultaneously, the sealing and protective design enhances the overall performance and service life of the universal joint, making it more suitable for the high-power performance requirements of modern industrial machinery. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the high-torque-bearing universal joint disclosed in an embodiment of the present utility model;

[0015] Figure 2 This is a first exploded structural diagram of the high-torque-bearing universal joint disclosed in an embodiment of the present invention;

[0016] Figure 3 This is a second exploded structural diagram of the high-torque-bearing universal joint disclosed in an embodiment of the present invention.

[0017] In the diagram: 100, universal joint body; 1001, universal joint fork; 1002, mounting groove; 1003, cross shaft; 1004, needle roller bearing; 1005, connecting hole; 1006, fixing groove; 1007, retaining groove; 1008, second threaded hole; 1009, first threaded hole; 200, shaft body; 2001, rotating shaft; 2002, pin; 2003, second through hole; 2004, first through hole. Detailed Implementation

[0018] 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.

[0019] Please see Figure 1 - Figure 3 This utility model provides a technical solution: a high torque-bearing universal joint, comprising the following steps:

[0020] Based on the design specifications, prepare a pair of high-strength universal joint forks 1001, made of high-strength alloy steel to ensure they are not easily deformed under high torque. Prepare a cross shaft 1003 processed with a special heat treatment process to improve its hardness and toughness. Select high-precision, high-load-bearing needle roller bearings 1004 to ensure smooth and reliable power transmission. Also prepare a pair of shafts 2001, serving as the input and output shafts respectively, with four sets of pins 2002 machined on their outer sides as required. In addition, prepare the first bolt, second bolt, sealant, and other components.

[0021] First, apply an appropriate amount of sealant to the connecting holes 1005 on the wall of the mounting groove 1002 at one end of the universal joint fork 1001. Then, install the needle roller bearing 1004 at the four ends of the cross shaft 1003. Next, insert the cross shaft with the needle roller bearing installed into the connecting holes 1005 so that the needle roller bearing fits tightly with the connecting holes. Use sealant to fill the tiny gaps between the cross shaft 1003 and the connecting holes 1005 to prevent impurities from entering and enhance the sealing of the connection.

[0022] Align the pin 2002 on the shaft 2001 with the slot 1007 on the wall of the fixing groove 1006 of the universal joint fork 1001, and slowly insert the shaft into the fixing groove to ensure accurate engagement of the pin and the slot, thus initially fixing the position of the shaft. Next, through the first threaded hole 1009 and the second threaded hole 1008 on the outside of the universal joint fork 1001, pass the first bolt and the second bolt through the first through hole 2004 and the second through hole 2003 on the shaft 2001, respectively. Since the diameter of the first bolt is larger than that of the second bolt, first pass the first bolt through the first through hole and engage it with the threaded connection of the first threaded hole, carefully controlling the tightening force to ensure that the first bolt is securely installed. Then, pass the second bolt through the opening on the outside of the first bolt and the second through hole, engaging it with the threaded connection of the second threaded hole to form a cross-shaped fixing structure. During installation, ensure that the connection point of the first bolt and the second bolt is located at the junction of the first through hole 2004 and the second through hole 2003, so that the two bolts fit tightly together and enhance the fixing effect. Finally, check whether the screw heads of the first and second bolts are completely inside the countersunk holes on the outside of the universal joint fork 1001. If there are any protruding parts, make appropriate adjustments to avoid the screw heads being hit during operation.

[0023] Specifically, the working principle of this high-torque universal joint is as follows: During use, the power generated by the engine is transmitted to the universal joint through the input shaft. The rotation of the input shaft drives the universal joint fork 1001 connected to it to rotate. The universal joint fork transmits power to another universal joint fork through the cross shaft 1003 and the needle roller bearing 1004, and then to the output shaft. Throughout the power transmission process, the engagement of the pin 2002 with the slot 1007 and the cross bolt fixing structure effectively limit the displacement of the shaft 2001, ensuring a stable connection even under high torque. The needle roller bearing 1004 reduces friction between the cross shaft and the universal joint fork, ensuring efficient and smooth power transmission. The sealant prevents dust and impurities from entering the universal joint, protecting components from wear and extending service life.

Claims

1. A high-torque-carrying universal joint, characterized in that, include: Universal joint body (100), the universal joint body (100) includes a pair of universal joint forks (1001) and a cross shaft (1003), the four ends of the cross shaft (1003) are respectively connected to the pair of universal joint forks (1001), and a fixing groove (1006) is opened on the side of the universal joint forks (1001) that are far apart from each other. Four sets of slots (1007) are equally spaced on the wall of the fixing groove (1006), and a cross fixing member is provided inside the fixing groove (1006); The shaft (200) includes a pair of rotating shafts (2001), which are respectively fixed in a pair of fixing grooves (1006) by cross fixing members. Four sets of pins (2002) are evenly distributed on the outer circumference of the rotating shafts (2001), and the pins (2002) engage with the grooves (1007).

2. The high-torque-bearing universal joint according to claim 1, characterized in that, The cross fastener includes a first bolt and a second bolt, with the second bolt passing through the first bolt to form a cross shape. The outer side of the universal joint fork (1001) is provided with a first threaded hole (1009) and a second threaded hole (1008) that communicate with the fixing groove (1006). The outer side of the rotating shaft (2001) is provided with a first through hole (2004) and a second through hole (2003). The first bolt passes through the first through hole (2004) and is threadedly engaged with the first threaded hole (1009). The second bolt passes through the second through hole (2003) and is threadedly engaged with the second threaded hole (1008).

3. A high-torque-carrying universal joint according to claim 2, characterized in that, The diameter of the first bolt is larger than the diameter of the second bolt. An opening is provided on the outer side of the first bolt, through which the second bolt passes. The diameter of the first through hole (2004) is larger than the diameter of the second through hole (2003). The first through hole (2004) and the second through hole (2003) are connected, and the connection point of the first bolt and the second bolt is located at the connection point of the first through hole (2004) and the second through hole (2003).

4. A high-torque-bearing universal joint according to claim 1, characterized in that, Of the pair of said shafts (2001), one is an output shaft and the other is an input shaft.

5. A high-torque-bearing universal joint according to claim 1, characterized in that, Each of the two universal joint forks (1001) has a mounting groove (1002) at one end close to each other. The wall of the mounting groove (1002) has a connecting hole (1005). Each of the four ends of the cross shaft (1003) is equipped with a needle roller bearing (1004), and the needle roller bearing (1004) is embedded in the connecting hole (1005).

6. A high-torque-carrying universal joint according to claim 5, characterized in that, The space between the cross shaft (1003) and the connecting hole (1005) is filled with sealant.

7. A high-torque-carrying universal joint according to claim 2, characterized in that, The outer side of the universal joint fork (1001) is provided with countersunk holes that communicate with the first threaded hole (1009) and the second threaded hole (1008), and the screw heads of the first bolt and the second bolt are located in the countersunk holes.

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