Cardan joint

Abstract

The utility model discloses a universal coupling device, including at least two universal joints, at least one connecting sleeve, the spline structure is connected between the at least two universal joints, each connecting sleeve corresponds one universal joint in the at least two universal joints, the one end of connecting sleeve and corresponding universal joint is away from the one end of spline structure and forms fixed connection or integral structure, and the connecting sleeve includes the detachable connection structure of corresponding transmission part direct connection, the universal coupling device can be directly connected with corresponding transmission part and realizes detachable connection, and it is favorable to reduce failure rate and maintenance difficulty, reduces maintenance cost, simultaneously, it is favorable to improve the rated load, and the reliability and service life are improved greatly, and the safety risk brought by maintenance is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of coupling technology, specifically relating to a universal coupling device. Background Technology

[0002] The work rolls on the hot rolling mill are cleaned using cleaning brush rollers to prevent aluminum from sticking to the rolls and affecting surface quality. These cleaning brush rollers are mounted on the bearing seats of the work rolls and are engaged or disengaged by a hydraulic cylinder, with rotation driven by a motor. Because the cleaning brush rollers need to switch between two states, the coupling connecting them is a universal joint structure. Currently, such as... Figure 1 As shown, the existing coupling uses two universal joints 101 and two split bushings for connection. The universal joints 101 at both ends of the coupling are connected to one end of the bushing by connecting flanges 102 and bolts, respectively. The other ends of the two bushings are then connected to the drive shaft of the motor and the brush roller of the cleaning roller, respectively, so as to realize the transmission.

[0003] The existing technology has the following main problems: (1) The universal joint used is installed in the bearing seat of the working roller. Due to the limited space, the rated transmission load of the selected coupling is insufficient. It often (about 3 to 5 months) has problems such as cross-joint breakage and twisting at the telescopic spline, which leads to unplanned roller replacement shutdown, resulting in wear and tear on the working roller and surface defects in the product, resulting in serious economic losses. (2) The bolts on the connecting flange between the coupling and the bushing are easy to loosen. Moreover, they are located in a narrow space and are not easy to tighten or be found. During maintenance, the roller often needs to be pulled out as a whole for maintenance, which is difficult. (3) The universal joint is prone to high frequency of damage and requires frequent preventive maintenance and replacement. The cost of maintenance spare parts is high. (4) When the universal joint is damaged on the line, the roller needs to be pulled out for replacement. This is a high-risk operation and brings uncertainty to personnel safety. Utility Model Content

[0004] The purpose of this invention is to at least partially avoid or solve the above-mentioned technical problems.

[0005] Specifically, this utility model proposes a universal joint device. The universal joint device includes at least two universal joints connected by a spline structure. The universal joint device also includes at least one connecting assembly. Each connecting assembly corresponds to one of the at least two universal joints. One end of the connecting assembly is fixedly connected to the end of the corresponding universal joint away from the spline structure or forms an integral structure. The connecting assembly includes a detachable connection structure for direct connection to a corresponding transmission component.

[0006] According to one embodiment of the present invention, at least one connecting kit has a shaft hole for inserting a corresponding transmission component. The connecting kit has a set screw hole with internal thread on the side wall of the shaft hole. The corresponding transmission component inserted into the shaft hole is tightened and fixed by the cooperation of the screw with the set screw hole.

[0007] According to one embodiment of the present invention, the shaft hole is constructed as a flat square hole, so that it can be connected to the flat head of the corresponding transmission component.

[0008] According to one embodiment of the present invention, a card seat protruding outward is formed on the outer periphery of the other end of the at least one connecting kit, and the card seat is configured to form a fixed connection with the corresponding transmission component by means of a clamp.

[0009] According to one embodiment of the present invention, the card holder has at least one positioning groove extending inward in the circumferential direction, and the positioning groove is configured to achieve a positioning function.

[0010] According to one embodiment of the present invention, one end of the at least one connecting kit is fixedly connected to the end of the corresponding universal joint away from the spline structure by welding.

[0011] According to one embodiment of the present invention, the universal joint includes: a drive half-shaft, one end of which is connected to the spline structure; a ball joint inner sleeve, the other end of which passes through the ball joint inner sleeve and forms a transmission connection between them; a rolling element, which contacts the inner side of a first groove formed on the outer periphery of the ball joint inner sleeve; a cage, which is constructed on the outer side of the ball joint inner sleeve to hold the rolling element; and a ball joint outer sleeve, which is constructed on the outer side of the cage, and a second groove corresponding to the first groove is formed on the inner periphery of the ball joint outer sleeve, such that the rolling element contacts the inner side of the second groove, thereby realizing relative rotation and oscillation between the ball joint outer sleeve and the ball joint inner sleeve through the rolling of the rolling element.

[0012] According to one embodiment of the present invention, the universal coupling device further includes a sealing sleeve, the two ends of which are respectively fixed by clamps to the outer periphery of the end of the transmission half shaft away from the rolling element and the end of the ball joint sleeve close to the spline structure.

[0013] According to one embodiment of this utility model, the spline structure is a telescopic spline, comprising a spline shaft with an outer spline formed on its outer circumference, a spline sleeve with one end fitted onto the spline shaft and an inner spline formed on its inner circumference that matches the outer spline, and a retaining ring fitted onto the spline shaft and located outside the spline sleeve. The end of the spline shaft located outside the spline sleeve is fixedly connected or integrally formed with the end of one of the at least two universal joints near the spline structure. The end of the spline sleeve away from the first universal joint is fixedly connected or integrally formed with the end of the other of the at least two universal joints near the spline structure.

[0014] According to one embodiment of the present invention, the spline structure further includes an oil injection nozzle formed on the side wall of the spline sleeve at the position where the inner spline and the outer spline mate, a sealing ring with one end sleeved on the spline shaft located outside the spline sleeve and the other end fixed on the outer periphery of the spline sleeve near the retaining ring, and a sealing ring sleeved on the spline shaft and located between the sealing ring and the spline sleeve.

[0015] The positive effects of this utility model are as follows: the universal coupling device provided by this utility model can be directly connected to the corresponding transmission components and can be detached, which helps to reduce the failure rate and maintenance difficulty, reduce maintenance costs, and at the same time, helps to increase the rated load, greatly improve reliability and service life, and reduce the safety risks caused by maintenance.

[0016] The connecting kit of the aforementioned universal coupling includes a detachable connecting structure that directly connects to the corresponding transmission component. One end of the connecting kit forms a fixed connection or an integral structure with one end of the universal joint. This not only achieves a detachable connection with the corresponding transmission component but also avoids the failures caused by loose bolts in the flange thread connection method used in the prior art. This greatly reduces the failure rate and maintenance difficulty of the universal coupling, and helps to reduce maintenance costs and time. The universal joint is designed as a ball cage structure, which, compared with the existing cross universal joint structure, greatly improves the rigidity and strength of the universal joint under the same installation space, and increases its rated load when rotating at various angles of inclination. Compared with the existing design, the mating length of the inner and outer splines of the spline structure is increased, preferably twice the original spline mating length, which greatly improves the transmission torque and solves the problem of insufficient transmission rigidity. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a coupling in the prior art;

[0018] Figure 2 This is a structural schematic diagram of the universal coupling device according to the present invention;

[0019] Figure 3 According to a preferred embodiment of the present invention, the first connecting kit is in Figure 2 Schematic diagram of the structure in direction A;

[0020] Figure 4 According to a preferred embodiment of the present invention, the second connecting kit is in Figure 2 Schematic diagram of the structure in direction B;

[0021] Figure 5 This is a schematic diagram of the universal joint structure according to a preferred embodiment of the present invention;

[0022] Figure 6 for Figure 2 A magnified view of point C in the middle.

[0023] The reference numerals in the attached figures are explained as follows:

[0024] 101. Universal joint; 102. Connecting flange;

[0025] 110. First connecting assembly; 111. Shaft hole; 112. Set screw hole;

[0026] 120. Second connecting kit; 121. Card holder; 122. Positioning slot;

[0027] 210. First universal joint; 220. Second universal joint;

[0028] 201. Drive half shaft; 202. Inner sleeve of ball joint; 203. Rolling element; 204. Cage; 205. Outer sleeve of ball joint; 206. Limit ring; 207. Sealing sleeve; 208. Clamp;

[0029] 300. Spline structure; 301. Spline shaft; 302. Spline sleeve; 303. Retaining ring; 304. Oil nozzle; 305. Sealing ring; 306. Sealing ring; 307. Guide sleeve; 308. Snap hole; 309. Fixing block. Detailed Implementation

[0030] In the following description, preferred embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0031] Unless the context requires otherwise, throughout the specification and claims, the word “comprising” and its variations, such as “including” and “having”, shall be understood to have an open, inclusive meaning, that is, to be interpreted as “including, but not limited to”.

[0032] Throughout this specification, references to "one embodiment" or "some embodiments" indicate that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment. Therefore, the appearance of "in one embodiment" or "in some embodiments" in various places throughout the specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any way in one or more embodiments.

[0033] Furthermore, the terms "first," "second," etc., used in the specification and claims are used merely for clarity of description to distinguish various objects, and do not limit the size, quantity, or other order of the objects described. Directional terms indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are used solely for the purpose of describing this application, not to indicate or imply that the objects referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application.

[0034] It should be noted that the transmission components described in this utility model are the transmission components that are connected to the universal coupling device during its use and installation, including but not limited to transmission shafts, transmission rollers, roller shafts, rotating shafts, etc.

[0035] The specific embodiments of this utility model will be described in detail below.

[0036] The universal coupling device provided by this utility model includes at least two universal joints and at least one connecting assembly. The at least two universal joints are connected by a spline structure 300. Each connecting assembly corresponds to one of the at least two universal joints. One end of the connecting assembly forms a fixed connection or an integral structure with the end of the corresponding universal joint away from the spline structure 300. The connecting assembly includes a detachable connection structure that is directly connected to the corresponding transmission component.

[0037] like Figure 2As shown, the universal joint device in the preferred embodiment of this utility model includes two universal joints and two connecting components. The two universal joints are a first universal joint 210 and a second universal joint 220, which are connected by a spline structure 300. The two connecting components are a first connecting component 110 and a second connecting component 120. The first connecting component 110 and the second connecting component 120 correspond to the first universal joint 210 and the second universal joint 220, respectively. Furthermore, one end of the first connecting component 110 and the second connecting component 120 is fixedly connected or integrally formed with the end of the corresponding first universal joint 210 and the second universal joint 220 away from the spline structure 300. Both the first connecting component 110 and the second connecting component 120 include a detachable connection structure that is directly connected to the corresponding transmission component, allowing for a direct detachable connection between the two components. Universal couplings, by directly configuring a detachable connection structure, eliminate intermediate connecting parts such as flanges and bolts when connecting with corresponding transmission components. This effectively avoids failures caused by loose bolts during use and reduces maintenance difficulty in confined spaces. Consequently, the failure rate and maintenance difficulty of universal couplings during installation and use are greatly reduced, which helps to reduce maintenance costs and time.

[0038] Preferably, one end of the first connecting kit 110 and the second connecting kit 120 are respectively fixedly connected to the end of the corresponding first universal joint 210 and the second universal joint 220 away from the spline structure 300 by welding, so as to facilitate the processing and production of the universal coupling device.

[0039] In a preferred embodiment, such as Figure 2 and 3 As shown, the first connecting kit 110 has a shaft hole 111 that can be inserted into the corresponding transmission component. The first connecting kit 110 has a set screw hole 112 on the side wall of the shaft hole 111. The inner circumference of the set screw hole 112 has an internal thread. The corresponding transmission component inserted into the shaft hole 111 is tightened and fixed by the cooperation of the screw and the set screw hole 112.

[0040] Preferably, see Figure 3 As shown, the shaft hole 111 is constructed as a flat square hole so that it can be connected with the flat head of the corresponding transmission component. Specifically, the flat head of the corresponding transmission component is first inserted into the flat square hole, and then the screw is screwed into the set screw hole 112 and tightened against the flat head of the corresponding transmission component, thereby realizing the limiting and fixing connection between the first connecting kit 110 and the corresponding transmission component.

[0041] In a preferred embodiment, see Figure 2As shown, a bracket 121 protruding outward is formed on the outer periphery of the end of the second connecting kit 120 away from the second universal joint 220. The bracket 121 is configured to form a fixed connection with the corresponding transmission component by means of, for example, a clamp structure.

[0042] Specifically, a retaining ring corresponding to the retaining seat 121 is also formed on the outer periphery of the end of the corresponding transmission component connected to the second connecting kit 120. By, for example, the cooperation between the retaining structure, the retaining seat 121, and the retaining ring, a fixed connection between the second connecting kit 120 and the corresponding transmission component is achieved.

[0043] Preferably, see Figure 2 and Figure 4 As shown, the card holder 121 has at least one inwardly extending positioning groove 122 formed in the circumferential direction. The positioning groove 122 can cooperate with the locking block on the corresponding transmission component, which facilitates the positioning of the second connecting kit 120 and the corresponding transmission component during installation. At the same time, it helps to achieve the limiting effect of both during transmission and improves the stability of operation. Specifically, when the second connecting kit 120 is connected to the corresponding transmission component, the positioning groove 122 is first aligned with the corresponding locking block to achieve the positioning effect. Then, for example, a clamp structure is sleeved on the outer periphery of the card holder 121 of the second connecting kit 120 and the retaining ring of the corresponding transmission component, and the clamp structure is locked, thereby achieving a fixed connection between the second connecting kit 120 and the corresponding transmission component.

[0044] It should be noted that the number of positioning slots 122 on the card holder 121 of the second connecting kit 120 corresponds to the number of card blocks on the corresponding transmission component, and can be 1, 2 or any number. This utility model does not limit the specific number.

[0045] like Figure 5As shown, both the first universal joint 210 and the second universal joint 220 adopt a ball cage structure. The universal joint includes a drive half-shaft 201, a ball joint inner sleeve 202, rolling elements 203, a cage 204, and a ball joint outer sleeve 205. One end of the drive half-shaft 201 is connected to the spline structure 300, and the other end of the drive half-shaft 201 passes through the ball joint inner sleeve 202. The drive half-shaft 201 and the ball joint inner sleeve 202 are connected by a spline to achieve a transmission connection. The cage 204 is constructed on the outside of the ball joint inner sleeve 202. The cage 204 has evenly distributed pockets that hold and guide the rolling elements 203. The ball joint outer sleeve 205 is constructed on the outside of the cage 204. A first groove evenly distributed along the circumference is formed on the outer periphery of the ball joint inner sleeve 202, and a second groove corresponding to the first groove is formed on the inner periphery of the ball joint outer sleeve 205. The number of rolling elements 203 is the same as the number of the first and second grooves. Each rolling element 203 corresponds to a first groove and a second groove, and is in contact with the inner side of the first groove of the inner sleeve of the ball joint 202 and the inner side of the second groove of the outer sleeve of the ball joint 205, respectively, thereby realizing the relative rotation and oscillation between the inner sleeve of the ball joint 202 and the outer sleeve of the ball joint 205 through the rolling of the rolling element 203.

[0046] One end of the first connecting kit 110 and the second connecting kit 120 are fixedly connected to the end of the ball joint sleeve 205 of the corresponding first universal joint 210 and second universal joint 220 by welding.

[0047] See Figure 5 As shown, a limiting ring 206 is provided on the transmission half-shaft 201 outside the ball joint inner sleeve 202. Preferably, the limiting ring 206 is a C-shaped retaining ring. Specifically, an annular groove is formed on the transmission half-shaft 201 at the position where the limiting ring 206 is installed, and the limiting ring 206 is fixed in the annular groove. The limiting ring 206 is used to achieve axial positioning of the ball joint inner sleeve 202, prevent the ball joint inner sleeve 202 from moving, and prevent the transmission half-shaft 201 from disengaging from the ball joint inner sleeve 202.

[0048] Furthermore, the universal joint also includes a sealing sleeve 207. The two ends of the sealing sleeve 207 are respectively fixed to the outer periphery of the drive half-shaft 201 away from the rolling element 203 and the ball joint outer sleeve 205 near the spline structure 300 by clamps 208. Specifically, the end of the sealing sleeve 207 away from the rolling element 203 is fitted onto the end of the drive half-shaft 201 away from the rolling element 203 and fixed to the outer periphery of the drive half-shaft 201 by clamps 208; the end of the sealing sleeve 207 near the rolling element 203 is fitted onto a retaining ring on the outer periphery of the ball joint outer sleeve 205 and fixed to the outer periphery of the ball joint outer sleeve 205 by clamps 208. The sealing sleeve 207 serves to achieve a dustproof seal.

[0049] It should be noted that the number of the aforementioned rolling elements 203 is not limited to 6 or 8. As long as the relative rotation between the inner sleeve 202 and the outer sleeve 205 of the ball joint is achieved, the number can be any.

[0050] See back Figure 2 As shown, the spline structure 300 is a telescopic spline. The spline structure 300 includes a spline shaft 301, a spline sleeve 302, and a retaining ring 303. An external spline is formed on the outer circumference of the spline shaft 301. One end of the spline sleeve 302 is fitted onto the spline shaft 301, and an internal spline matching the external spline is formed on its inner circumference. The spline shaft 301 and the spline sleeve 302 are connected by the engagement of the external and internal splines, and the spline shaft 301 and the spline sleeve 302 can slide relative to each other axially. A groove is formed on the outer side of the spline sleeve 302, near its outer circumference, and the retaining ring 303 is fixed in the groove. Preferably, the retaining ring 303 is a C-type retaining ring. The retaining ring 303 is used to achieve axial positioning of the spline shaft 301, limit the sliding stroke of the spline shaft 301 and the spline sleeve 302, and prevent the spline sleeve 302 from slipping off the spline shaft 301.

[0051] The end of the spline shaft 301 located outside the spline sleeve 302 is fixedly connected or integrally formed with the end of the drive half-shaft 201 of the second universal joint 220 near the spline structure 300. Preferably, the end of the spline shaft 301 located outside the spline sleeve 302 and the end of the drive half-shaft 201 of the second universal joint 220 near the spline structure 300 are integrally formed. The end of the spline sleeve 302 away from the second universal joint 220 is fixedly connected or integrally formed with the end of the drive half-shaft 201 of the first universal joint 210 near the spline structure 300. Preferably, the end of the spline sleeve 302 away from the second universal joint 220 and the end of the drive half-shaft 201 of the first universal joint 210 near the spline structure 300 are fixedly connected by welding.

[0052] In a preferred embodiment, the end of the spline sleeve 302 near the first universal joint 210 is connected to the end of the drive half-shaft 201 of the first universal joint 210 near the spline structure 300 via a guide sleeve 307. The end of the spline shaft 301 away from the second universal joint 220 passes through the spline sleeve 302 and extends into the guide sleeve 307. The spline sleeve 302 and one end of the spline shaft 301 are connected by an internal spline and an external spline fit. The two ends of the guide sleeve 307 are fixedly connected to the end of the spline sleeve 302 near the first universal joint 210 and the end of the drive half-shaft 201 of the first universal joint 210 near the spline structure 300 by welding, thereby facilitating the processing and production of the spline structure 300. Furthermore, compared with the prior art, the length of the spline fit between the spline sleeve 302 and the spline shaft 301 is increased to twice the original length, increasing the contact area for torque transmission and greatly improving the transmission torque of the spline structure 300, thus solving the problem of insufficient transmission rigidity in the prior art.

[0053] It should be noted that, in the above embodiments, the fixed connection can be any other connection method besides welding. It should be understood that the protection scope of this utility model is not limited to welding.

[0054] Furthermore, the spline structure 300 also includes a grease nipple 304, a sealing ring 305, and a sealing ring 306. The grease nipple 304 is disposed on the side wall of the spline sleeve 302 at the mating position of the inner and outer splines, and grease is added into the spline structure 300 through the grease nipple 304. The grease nipple 304 is a unidirectional flow channel. Preferably, the grease nipple 304 is designed as a grease nipple structure.

[0055] See Figure 2 and Figure 6 As shown, one end of the sealing ring 305 is fitted onto the spline shaft 301 located outside the spline sleeve 302, and the other end is fixed to the outer periphery of the spline sleeve 302 near the retaining ring 303. Specifically, an annular retaining hole 308 is formed on the outer periphery of the spline sleeve 302 near the retaining ring 303, and a fixing block 309 is formed at one end of the sealing ring 305 that mates with the retaining hole 308. The sealing ring 305 and the spline sleeve 302 are securely connected through the engagement of the retaining hole 308 and the fixing block 309. The sealing ring 305 is tightly fixed to the spline shaft 301 and the spline sleeve 302, thereby forming a sealed protection for the spline structure. The sealing ring 306 is fitted onto the spline shaft 301 and located between the sealing ring 305 and the spline sleeve 302. The sealing ring 306 is used to further achieve sealing protection and prevent grease leakage.

[0056] It should be noted that the number of the above-mentioned grease nipples 304 is not limited to one or two. As long as the lubricating effect is achieved by adding grease into the spline structure 300, the number can be any.

[0057] In a preferred embodiment, the aforementioned universal joint device is applied to a cleaning brush roller used for cleaning work rolls on a hot rolling mill. The first connecting assembly 110 and the second connecting assembly 120 at both ends of the universal joint device are respectively connected to the brush roller of the cleaning brush roller and the drive shaft of the motor. This solves the problem of frequent damage to the original universal joint, improves equipment reliability and service life, reduces downtime and quality losses, lowers the maintenance cost and difficulty of the cleaning brush roller universal joint, and effectively prevents the safety risks associated with roller removal repairs due to damage to the cleaning brush roller universal joint.

[0058] The universal coupling device provided by this utility model can be directly connected to the corresponding transmission components and can be detached, which helps to reduce the failure rate and maintenance difficulty, reduce maintenance costs, and at the same time, helps to increase the rated load, significantly improve reliability and service life, and reduce the safety risks caused by maintenance.

[0059] The connecting kit of the aforementioned universal joint includes a detachable connection structure that directly connects to the corresponding transmission component. One end of the connecting kit forms a fixed connection or an integral structure with one end of the universal joint. This not only achieves a detachable connection with the corresponding transmission component but also avoids the failures caused by loose bolts in the flange thread connection method used in the prior art. This significantly reduces the failure rate and maintenance difficulty of the universal joint, and helps reduce maintenance costs and time. The universal joint is designed as a ball cage structure, which, compared with the existing cross universal joint structure, greatly improves the rigidity and strength of the universal joint under the same installation space, increasing its rated load under various tilt angles. Compared with the existing design, the mating length of the internal and external splines in the spline structure is increased, preferably twice the original spline mating length, greatly increasing the transmission torque and thus solving the problem of insufficient transmission rigidity.

[0060] It should be noted that the features or combinations of features described above according to the present utility model, as well as the features and combinations of features mentioned and / or shown only in the accompanying drawings, can be used not only in the given combinations, but also in other combinations or individually, without departing from the scope of the present utility model.

[0061] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this utility model to the scope of the described embodiments. Those skilled in the art should understand that many more changes and modifications can be made based on the teachings of this utility model, and all such changes and modifications fall within the protection scope of this utility model.

Claims

1. A universal joint device, comprising at least two universal joints, wherein the at least two universal joints are connected by a spline structure (300), characterized in that, The universal coupling device further includes at least one connecting kit, each connecting kit corresponding to one of the at least two universal joints, one end of the connecting kit forming a fixed connection or an integral structure with the end of the corresponding universal joint away from the spline structure (300), and the connecting kit including a detachable connecting structure directly connected to the corresponding transmission component.

2. The universal coupling device according to claim 1, characterized in that, The at least one connecting kit has a shaft hole (111) for inserting a corresponding transmission component. The connecting kit has a set screw hole (112) with internal thread on the side wall of the shaft hole. The corresponding transmission component inserted into the shaft hole (111) is tightened and fixed by the cooperation of the screw with the set screw hole (112).

3. The universal coupling device according to claim 2, characterized in that, The shaft hole (111) is constructed as a flat square hole so that it can be connected to the flat head of the corresponding transmission component.

4. The universal coupling device according to claim 1, characterized in that, A card holder (121) protruding outward is formed on the outer periphery of the other end of the at least one connecting kit, the card holder (121) being configured to form a fixed connection with the corresponding transmission component by means of a clamp.

5. The universal coupling device according to claim 4, characterized in that, The card holder (121) has at least one positioning groove (122) extending inward in the circumferential direction.

6. The universal coupling device according to claim 1, characterized in that, One end of the at least one connecting kit is fixedly connected to the end of the corresponding universal joint away from the spline structure (300) by welding.

7. The universal coupling device according to claim 1, characterized in that, The universal joint includes: A transmission half-shaft (201), one end of which is connected to the spline structure (300); The ball joint inner sleeve (202) is provided, and the other end of the transmission half shaft (201) passes through the ball joint inner sleeve (202), and a transmission connection is formed between the two. A rolling element (203) contacts the inner side of a first groove formed on the outer periphery of the ball joint inner sleeve (202); A cage (204) is constructed outside the inner sleeve (202) of the ball joint for retaining the rolling element (203). A ball joint sleeve (205) is constructed on the outside of the cage (204). A second groove corresponding to the first groove is formed on the inner circumference of the ball joint sleeve (205), and the rolling element (203) contacts the inner side of the second groove, thereby realizing the relative rotation between the ball joint sleeve (205) and the ball joint inner sleeve (202) through the rolling of the rolling element (203).

8. The universal coupling device according to claim 7, characterized in that, The universal coupling also includes a sealing sleeve (207), the two ends of which are fixed by clamps (208) to the outer periphery of the end of the transmission half shaft (201) away from the rolling element (203) and the end of the ball joint sleeve (205) near the spline structure (300).

9. The universal coupling device according to claim 1, characterized in that, The spline structure (300) is a telescopic spline, which includes a spline shaft (301) with an outer spline formed on its outer circumference, a spline sleeve (302) with an inner spline formed on its inner circumference that matches the outer spline, and a retaining ring (303) that is sleeved on the spline shaft (301) and located outside the spline sleeve (302). The spline shaft (301) is fixedly connected or integrally formed with one end of one of the at least two universal joints near the spline structure (300) at the outside of the spline sleeve (302); The end of the spline sleeve (302) away from the one universal joint is fixedly connected or integrally formed with the end of the other universal joint of the at least two universal joints near the spline structure (300).

10. The universal coupling device according to claim 9, characterized in that, The spline structure (300) further includes an oiling nozzle (304) formed on the side wall of the spline sleeve (302) at the position where the inner spline and the outer spline mate, a sealing ring (305) with one end sleeved on the spline shaft (301) located outside the spline sleeve (302) and the other end fixed on the outer periphery of the spline sleeve (302) near the retaining ring (303), and a sealing ring (306) sleeved on the spline shaft (301) and located between the sealing ring (305) and the spline sleeve (302).

Images