Wear-resistant cross shaft type universal coupling

Abstract

The utility model relates to an abrasion-resistant cross shaft type universal coupling which is provided with a shaft sleeve and a connecting shaft capable of being in sliding fit with the shaft sleeve, and cross universal connecting seats are fixedly arranged at the lower end of the shaft sleeve and the upper end of the connecting shaft. The shaft sleeve is provided with a sliding cavity, the lower end of the connecting shaft is slidably arranged in the sliding cavity, a plurality of wear-resistant blocks circumferentially distributed in the axis direction of the connecting shaft are detachably arranged on the portion, slidably arranged on the shaft sleeve, of the lower end of the connecting shaft, and a plurality of wear-resistant grooves in one-to-one correspondence with the wear-resistant blocks and in sliding fit with the wear-resistant blocks are formed in the inner wall of the shaft sleeve. One end of the wear-resistant groove extends out of the upper end of the shaft sleeve and communicates with the outside, the other end of the wear-resistant groove extends into the shaft sleeve, and the lower end of the connecting shaft is slidably arranged in the shaft sleeve through sliding fit of the wear-resistant block and the wear-resistant groove; according to the wear-resistant coupling, the wear resistance of the coupling can be enhanced by replacing wear-resistant parts, and the service life of the coupling is prolonged.

Description

Technical Field

[0001] The utility model relates to a wear-resistant cross-shaft type universal coupling. Background Art

[0002] The cross-axis universal coupling is one of the most commonly used couplings. It is also called a universal joint. Its structural characteristics can make two axes that are not on the same axis or have a large axis angle or large axial movement rotate continuously at the same angular speed, and reliably transmit torque and motion. At present, it has been widely used to transmit torque in mechanical shaft systems.

[0003] After long-term use, the existing coupling will directly cause wear on the connecting shaft and the sleeve. When the wear reaches a certain degree, the connection between the connecting shaft and the sleeve will become loose, and the use effect of the coupling will be greatly reduced, affecting the use, thereby reducing the service life of the coupling; after the connecting shaft and the sleeve are directly worn, it is usually necessary to replace the entire coupling, but since only a part of the part is worn, it is very wasteful to replace the entire coupling. Now there is a need for a design that can replace the worn part to extend the service life of the entire coupling. Utility Model Content

[0004] The utility model aims to provide a wear-resistant cross-shaft universal coupling, which can enhance the wear resistance of the coupling and increase its service life by replacing wear-resistant parts.

[0005] The technical solution to achieve the purpose of the utility model is as follows: the utility model comprises a shaft sleeve and a connecting shaft that can form a sliding fit with the shaft sleeve, the lower end of the shaft sleeve and the upper end of the connecting shaft are fixedly provided with a cross universal connecting seat; the shaft sleeve is provided with a sliding cavity, the lower end of the connecting shaft is slidably arranged in the sliding cavity, the lower end of the connecting shaft is slidably arranged on the part of the shaft sleeve and is detachably provided with a plurality of wear-resistant blocks distributed circumferentially around the axial direction of the connecting shaft, the inner wall of the shaft sleeve is provided with a plurality of wear-resistant grooves that correspond one-to-one with the wear-resistant blocks and form a corresponding sliding fit, one end of the wear-resistant groove extends out of the upper end of the shaft sleeve and is connected to the outside, the other end of the wear-resistant groove extends to the interior of the shaft sleeve, the lower end of the connecting shaft is slidably arranged in the shaft sleeve through the sliding fit between the wear-resistant block and the wear-resistant groove; the upper end of the shaft sleeve is provided with a limiting component for limiting the wear-resistant block inside the shaft sleeve.

[0006] Furthermore, a groove is provided on the lower end of the connecting shaft, a rod sleeve is fixedly provided at the bottom of the groove, a first spring is provided on the rod sleeve, and a connecting rod which can be inserted into the rod sleeve and form a sliding fit is provided on the wear-resistant block. One end of the first spring acts on the bottom of the groove, and the other end of the first spring acts on the wear-resistant block. The wear-resistant block is detachably mounted on the connecting shaft through the sliding fit of the inserted rod and the rod sleeve and always seeks a sliding fit with the wear-resistant groove under the elastic force of the first spring.

[0007] Furthermore, the limiting assembly includes a first annular half hoop and a second annular half hoop, which are detachably fixed on the upper end of the sleeve by bolts and combined to form a hoop for blocking the gap between the connecting shaft and the upper end of the sleeve, and the inner wall of the first annular half hoop and the inner wall of the second annular half hoop are both provided with wear-resistant plates that can form a sliding fit with the outer wall of the connecting shaft; the wear-resistant block is limited inside the sleeve by sliding fit with the wear-resistant groove and the restriction of the hoop.

[0008] Furthermore, a second spring is provided between the bottom of the sleeve and the connecting shaft, a shaft extending toward the inside of the sleeve is provided on the connecting shaft, the second spring is sleeved on the shaft, one end of the second spring acts on the bottom of the sleeve, and the other end of the second spring acts on the connecting shaft.

[0009] Furthermore, lubricant is filled between the wear-resistant block and the wear-resistant groove.

[0010] Furthermore, the wear-resistant blocks, wear-resistant grooves and wear-resistant sheets are all provided with ceramic wear-resistant layers.

[0011] The utility model has positive effects: (1) a wear-resistant block is detachably fixed on the connecting shaft of the utility model, a plurality of wear-resistant grooves corresponding to the wear-resistant blocks and forming a corresponding sliding fit are provided on the inner wall of the sleeve, one end of the wear-resistant groove extends out of the upper end of the sleeve and is connected to the outside, and the other end of the wear-resistant groove extends to the inside of the sleeve; when the wear-resistant block needs to be replaced after long-term use, the wear-resistant block is slid out from the end of the wear-resistant groove connected to the outside, and the wear-resistant block is replaced, which is efficient and convenient and can extend the service life of the coupling.

[0012] (2) The utility model has a groove on the lower end of the connecting shaft, a rod sleeve is fixedly provided at the bottom of the groove, and a connecting rod which can be inserted into the rod sleeve and form a sliding fit is provided on the wear-resistant block. The wear-resistant groove is connected and slidably fitted between the connecting rod and the rod sleeve; when the connecting rod and the rod sleeve form a sliding fit, the wear-resistant groove is fixedly provided on the connecting shaft. When the connecting rod is taken out from the rod sleeve, the wear-resistant block can be taken off from the connecting shaft quickly and efficiently.

[0013] (3) The utility model has a first spring on the rod sleeve, one end of the first spring acts on the bottom of the groove, and the other end of the first spring acts on the wear-resistant block. The wear-resistant block always seeks sliding cooperation with the wear-resistant groove under the elastic force of the first spring, which can ensure that sliding can always be formed between the connecting shaft and the sleeve, avoiding shaking of the connecting shaft and the sleeve during operation.

[0014] (4) The limiting assembly of the utility model includes a first annular half hoop and a second annular half hoop, which are detachably fixed on the upper end of the sleeve by bolts and combined to form a hoop for blocking the gap between the connecting shaft and the upper end of the sleeve. The first annular half hoop and the second annular half hoop can block the gap between the connecting shaft and the sleeve. At the same time, since the inner walls of the first annular half hoop and the second annular half hoop are provided with wear-resistant sheets that can form a sliding fit with the outer wall of the connecting shaft, when the wear-resistant strip connecting shaft slides, the first annular half hoop and the second annular half hoop can limit the wear-resistant block from sliding in the wear-resistant groove to prevent the wear-resistant block from sliding out of the wear-resistant groove.

[0015] (5) The first annular half hoop and the second annular half hoop of the utility model are fixed by bolts. After the wear-resistant sheets on the first annular half hoop and the second annular half hoop are severely worn, the first annular half hoop and the second annular half hoop can be removed and replaced to extend the service life.

[0016] (6) A second spring is provided between the bottom of the sleeve and the connecting shaft of the utility model, and a shaft extending toward the inside of the sleeve is provided on the connecting shaft. The second spring is sleeved on the shaft, and one end of the second spring acts on the bottom of the sleeve, and the other end of the second spring acts on the connecting block. The second spring is sleeved on the shaft, so that the second spring can ensure that the connecting shaft moves along the axis when it rebounds. At the same time, the second spring can provide buffering when the connecting shaft slides, thereby reducing the friction between the connecting shaft and the sleeve and further increasing the wear resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to specific embodiments and in conjunction with the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a cross-sectional view of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the limit assembly of the utility model;

[0021] Figure 4 for Figure 2 A partial enlarged view of center. DETAILED DESCRIPTION

[0022] See Figures 1 to 4The utility model discloses a shaft sleeve 2 and a connecting shaft 3 that can form a sliding fit with the shaft sleeve 2. The lower end of the shaft sleeve 2 and the upper end of the connecting shaft 3 are fixedly provided with a cross universal connecting seat 1; the shaft sleeve 2 is provided with a sliding cavity, and the lower end of the connecting shaft 3 is slidably arranged in the sliding cavity. The lower end of the connecting shaft 3 is slidably arranged on the part of the shaft sleeve 2 and is detachably provided with a plurality of wear-resistant blocks 31 distributed circumferentially around the axial direction of the connecting shaft 3. The inner wall of the shaft sleeve 2 is provided with a plurality of wear-resistant grooves 21 that correspond to the wear-resistant blocks 31 one by one and form a corresponding sliding fit. One end of the wear-resistant groove 21 extends out of the upper end of the shaft sleeve 2 and is connected to the outside, and the other end of the wear-resistant groove 21 extends to the interior of the shaft sleeve 2. The lower end of the connecting shaft 3 is slidably arranged in the shaft sleeve 2 through the sliding fit between the wear-resistant block 31 and the wear-resistant groove 21; the upper end of the shaft sleeve 2 is provided with a limit assembly 4 for limiting the wear-resistant block 31 inside the shaft sleeve 2.

[0023] The plurality of wear-resistant grooves 21 are distributed circumferentially along the axis direction of the sleeve 2 .

[0024] A groove 32 is provided on the lower end of the connecting shaft 3, and a rod sleeve 33 is fixedly provided at the bottom of the groove 32. A first spring 5 is sleeved on the rod sleeve 33. A connecting rod 311 which can be inserted into the rod sleeve 33 and form a sliding fit is provided on the wear-resistant block 31. One end of the first spring 5 acts on the bottom of the groove 32, and the other end of the first spring 5 acts on the wear-resistant block 31. The wear-resistant block 31 is detachably installed on the connecting shaft 3 through the sliding fit between the inserted rod and the rod sleeve 33 and always seeks a sliding fit with the wear-resistant groove 21 under the elastic force of the first spring 5.

[0025] The limiting assembly 4 includes a first annular half hoop 41 and a second annular half hoop 42. The first annular half hoop 41 and the second annular half hoop 42 are detachably fixed on the upper end of the sleeve 2 by bolts and are combined to form a hoop for blocking the gap between the connecting shaft 3 and the upper end of the sleeve 2. The inner wall of the first annular half hoop 41 and the inner wall of the second annular half hoop 42 are both provided with wear-resistant sheets 43 that can form a sliding fit with the outer wall of the connecting shaft 3; the wear-resistant block 31 is limited inside the sleeve 2 by sliding fit with the wear-resistant groove 21 and the restriction of the hoop.

[0026] The first annular half hoop 41 and the second annular half hoop 42 are both provided with a plurality of first screw holes, and the upper end of the sleeve 2 is provided with a plurality of second threads corresponding to the first screw holes one by one, and the first screw holes and the second screw holes can both form threaded cooperation with the bolts, and the first annular half hoop 41 and the second annular half hoop 42 are fixedly arranged on the upper end of the sleeve 2 by the threaded cooperation between the bolts and the first screw holes and the second screw holes; the first annular half hoop 41 and the second annular half hoop 42 can be removed from the sleeve 2 by removing the bolts.

[0027] A second spring 6 is provided between the bottom of the sleeve 2 and the connecting shaft 3. The connecting shaft 3 is provided with a shaft rod 34 extending toward the inside of the sleeve 2. The second spring 6 is sleeved on the shaft rod 34. One end of the second spring 6 acts on the bottom of the sleeve 2, and the other end of the second spring 6 acts on the connecting shaft 3. The connecting shaft 3 can slide inside the sleeve 2 under the elastic force of the second spring 6 and the restriction of the second annular half hoop 42 and the second annular half hoop 42.

[0028] The space between the wear-resistant block 31 and the wear-resistant groove 21 is filled with lubricant.

[0029] The wear-resistant block 31 , the wear-resistant groove 21 and the wear-resistant sheet 43 are all provided with a ceramic wear-resistant layer.

[0030] The connecting shaft 3 and the shaft sleeve 2 are coaxially arranged.

[0031] The working principle of the utility model is as follows: the first spring 5 is sleeved on the rod sleeve 33, and then the connecting rod 311 on the wear-resistant block 31 is inserted into the rod sleeve 33, and the two ends of the first spring 5 act on the groove 32 and the wear-resistant block 31 respectively; thereafter, the wear-resistant block 31 is inserted into the wear-resistant groove 21 from the upper end of the sleeve 2 for sliding, and the first annular half hoop 41 and the second annular half hoop 42 are fixed to the upper end of the sleeve 2 by bolts to limit the wear-resistant block 31; when the wear-resistant block 31 needs to be replaced, the first annular half hoop 41 and the second annular half hoop 42 are removed, the connecting rod 311 is pulled out, and then the wear-resistant block 31 is taken out from the connecting rod 311 for replacement, and the above steps are repeated to complete the replacement.

[0032] When the wear-resistant sheets 43 on the inner walls of the first annular half hoop 41 and the second annular half hoop 42 are severely worn, the first annular half hoop 41 and the second annular half hoop 42 can be removed and replaced.

[0033] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wear-resistant cross-shaft universal coupling, comprising a shaft sleeve (2) and a connecting shaft (3) which can form a sliding fit with the shaft sleeve (2), wherein a cross universal connecting seat (1) is fixedly provided at the lower end of the shaft sleeve (2) and the upper end of the connecting shaft (3); the characteristics are: The shaft sleeve (2) is provided with a sliding cavity, the lower end of the connecting shaft (3) is slidably arranged in the sliding cavity, the lower end of the connecting shaft (3) is slidably arranged on the part of the shaft sleeve (2) and is detachably provided with a plurality of wear-resistant blocks (31) distributed circumferentially around the axial direction of the connecting shaft (3), the inner wall of the shaft sleeve (2) is provided with a plurality of wear-resistant grooves (21) corresponding to the wear-resistant blocks (31) and correspondingly forming a sliding fit, one end of the wear-resistant groove (21) extends out of the upper end of the shaft sleeve (2) and is connected to the outside, the other end of the wear-resistant groove (21) extends to the inside of the shaft sleeve (2), the lower end of the connecting shaft (3) is slidably arranged in the shaft sleeve (2) through the sliding fit between the wear-resistant blocks (31) and the wear-resistant grooves (21); the upper end of the shaft sleeve (2) is provided with a limiting component (4) for limiting the wear-resistant blocks (31) inside the shaft sleeve (2).

2. The wear-resistant cross-axis universal coupling according to claim 1, characterized in that: The lower end of the connecting shaft (3) is provided with a groove (32), the bottom of the groove (32) is fixedly provided with a rod sleeve (33), the rod sleeve (33) is sleeved with a first spring (5), and the wear-resistant block (31) is provided with a connecting rod (311) which can be inserted into the rod sleeve (33) and form a sliding fit, one end of the first spring (5) acts on the bottom of the groove (32), and the other end of the first spring (5) acts on the wear-resistant block (31), and the wear-resistant block (31) is detachably mounted on the connecting shaft (3) through the sliding fit of the insertion rod and the rod sleeve (33) and always seeks a sliding fit with the wear-resistant groove (21) under the elastic force of the first spring (5).

3. The wear-resistant cross-axis universal coupling according to claim 1, characterized in that: The limiting assembly (4) comprises a first annular half hoop (41) and a second annular half hoop (42); the first annular half hoop (41) and the second annular half hoop (42) are detachably fixedly arranged on the upper end of the shaft sleeve (2) by bolts and are combined to form a hoop for blocking the gap between the connecting shaft (3) and the upper end of the shaft sleeve (2); the inner wall of the first annular half hoop (41) and the inner wall of the second annular half hoop (42) are both provided with a wear-resistant sheet (43) that can form a sliding fit with the outer wall of the connecting shaft (3); the wear-resistant block (31) is limited inside the shaft sleeve (2) by sliding fit with the wear-resistant groove (21) and by the restriction of the hoop.

4. The wear-resistant cross-axis universal coupling according to claim 1, characterized in that: A second spring (6) is provided between the bottom of the sleeve (2) and the connecting shaft (3); a shaft (34) extending toward the inside of the sleeve (2) is provided on the connecting shaft (3); the second spring (6) is sleeved on the shaft (34); one end of the second spring (6) acts on the bottom of the sleeve (2); and the other end of the second spring (6) acts on the connecting shaft (3).

5. The wear-resistant cross-axis universal coupling according to claim 1, characterized in that: Lubricant is filled between the wear-resistant block (31) and the wear-resistant groove (21).

6. The wear-resistant cross-axis universal coupling according to claim 3, characterized in that: The wear-resistant block (31), the wear-resistant groove (21) and the wear-resistant sheet (43) are all provided with a ceramic wear-resistant layer.

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