Universal joint pin of universal coupling

Abstract

The utility model discloses a universal coupling cross shaft which comprises a cross shaft body, the cross shaft body comprises a plurality of connecting shafts, bearing sleeves are connected to the outer walls of the connecting shafts in a sleeved mode, protruding parts are integrally formed on the circumferential inner walls of the bearing sleeves, two protection grooves are formed in the inner sides of the protruding parts, threaded grooves are formed in one ends of the connecting shafts, and threaded holes are formed in the threaded grooves. A fixing bolt is inserted into the threaded groove in a threaded mode, the fixing bolt is rotationally inserted into one end of a bearing sleeve, the circumferential outer wall of the connecting shaft is sleeved with a roller bearing, the roller bearing is sleeved with the bearing sleeve, the circumferential outer wall of the connecting shaft is sleeved with a first sealing ring and a second sealing ring, and the first sealing ring and the second sealing ring are located in the bearing sleeve. The protection groove is of an annular structure, and the first sealing ring and the second sealing ring are located on the two sides of the protruding part respectively. The connecting shaft and the bearing sleeve are rigidly sealed through the protruding part, so that abrasion is reduced, and lubricating oil is prevented from overflowing.

Description

Technical Field

[0001] The utility model relates to the technical field of couplings, in particular to a universal coupling cross shaft. Background Art

[0002] Universal joint is a component that realizes variable angle power transmission. It is used in the position where the direction of the transmission axis needs to be changed. It is the "joint" component of the universal transmission device of the automobile drive system. Universal joint is an important part of the universal coupling.

[0003] At present, most of the existing universal coupling cross shafts use a single rubber ring for sealing. However, this rubber sealing ring is in direct contact with the cross shaft body and the housing, which can easily cause the sealing ring to wear and lose its sealing effect, causing the internal lubricating oil of the cross shaft to overflow, thereby increasing the friction and wear of the cross shaft, thereby reducing the service life of the cross shaft. Utility Model Content

[0004] The utility model aims to solve the problem in the prior art that the rubber sealing ring is in direct contact with the cross shaft body and the housing, which easily causes the sealing ring to wear and cause it to lose its sealing effect, resulting in overflow of the internal lubricating oil of the cross shaft, thereby aggravating the friction and wear of the cross shaft, thereby reducing the service life of the cross shaft, and proposes a universal coupling cross shaft.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A universal joint cross shaft comprises a cross shaft body, the cross shaft body comprises a plurality of connecting shafts, the outer wall of the connecting shaft is sleeved with a bearing sleeve, the circumferential inner wall of the bearing sleeve is integrally formed with a raised portion, the inner side of the raised portion is provided with two protective grooves, one end of the connecting shaft is provided with a threaded groove, a fixing bolt is threadedly inserted in the threaded groove, the fixing bolt is rotatably inserted with one end of the bearing sleeve, the circumferential outer wall of the connecting shaft is sleeved with a roller bearing, the bearing sleeve is sleeved on the outside of the roller bearing, the circumferential outer wall of the connecting shaft is sleeved with a first sealing ring and a second sealing ring, the first sealing ring and the second sealing ring are located in the bearing sleeve.

[0007] Furthermore, the protection groove is an annular structure.

[0008] Furthermore, the first sealing ring and the second sealing ring are respectively located on two sides of the raised portion.

[0009] Furthermore, a locating bearing is sleeved on the circumferential outer wall of the connecting shaft, and the bearing sleeve is sleeved on the outer side of the locating bearing.

[0010] Furthermore, the second sealing ring is located between the positioning bearing and the raised portion.

[0011] Furthermore, the first sealing ring is located between the roller bearing and the raised portion.

[0012] The beneficial effects of the utility model are:

[0013] 1. The convex part is used to harden the connection shaft and the bearing sleeve, thereby reducing wear and preventing the overflow of lubricating oil.

[0014] 2. A protective groove is provided on the inner side of the raised portion. When the raised portion is worn, the lubricating oil flows into the protective groove for temporary storage, thereby preventing the lubricating oil from leaking.

[0015] 3. Improve the stability of bearing sleeve rotation through roller bearings and locating bearings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a universal coupling cross shaft proposed by the utility model;

[0017] Figure 2 This is an enlarged cross-sectional structural schematic diagram of a universal coupling cross shaft proposed by the utility model;

[0018] Figure 3 The utility model is a schematic diagram of the exploded structure of a universal coupling cross shaft.

[0019] In the figure: 1. cross shaft body; 2. connecting shaft; 3. bearing sleeve; 4. raised part; 5. protective groove; 6. threaded groove; 7. fixing bolt; 8. roller bearing; 9. first sealing ring; 10. second sealing ring; 11. positioning bearing. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Reference Figure 1-Figure 3A universal joint cross shaft comprises a cross shaft body 1, the cross shaft body 1 comprises a plurality of connecting shafts 2, the outer wall of the connecting shaft 2 is sleeved with a bearing sleeve 3, the inner wall of the circumference of the bearing sleeve 3 is integrally formed with a protrusion 4, the protrusion 4 is used to perform a hard seal between the connecting shaft 2 and the bearing sleeve 3, thereby reducing wear and preventing the overflow of lubricating oil, and the inner side of the protrusion 4 is provided with two protective grooves 5, when the protrusion 4 is worn, the lubricating oil flows into the protective groove 5 for temporary storage, thereby preventing the lubricating oil from leaking, and the connecting shaft 2 is sleeved with a bearing sleeve 3. A threaded groove 6 is provided at one end of the connecting shaft 2, and a fixing bolt 7 is inserted into the inner thread of the threaded groove 6. The fixing bolt 7 is rotatably inserted into one end of the bearing sleeve 3. A roller bearing 8 is sleeved on the circumferential outer wall of the connecting shaft 2, and the bearing sleeve 3 is sleeved on the outside of the roller bearing 8. A first sealing ring 9 and a second sealing ring 10 are sleeved on the circumferential outer wall of the connecting shaft 2. The first sealing ring 9 and the second sealing ring 10 are used to perform a soft seal between the connecting shaft 2 and the bearing sleeve 3, and the first sealing ring 9 and the second sealing ring 10 are located in the bearing sleeve 3.

[0022] The protective groove 5 is an annular structure. The first sealing ring 9 and the second sealing ring 10 are respectively located on both sides of the raised portion 4. The circumferential outer wall of the connecting shaft 2 is sleeved with a locating bearing 11. The roller bearing 8 and the locating bearing 11 are used to improve the rotation stability of the bearing sleeve 3. The bearing sleeve 3 is sleeved on the outside of the locating bearing 11. The second sealing ring 10 is located between the locating bearing 11 and the raised portion 4, and the first sealing ring 9 is located between the roller bearing 8 and the raised portion 4.

[0023] The working principle of this embodiment: when in use, first, a soft seal is performed between the connecting shaft 2 and the bearing sleeve 3 through the first sealing ring 9 and the second sealing ring 10, and then a hard seal is performed between the connecting shaft 2 and the bearing sleeve 3 through the protrusion 4, thereby reducing wear and preventing the overflow of the lubricating oil. When the protrusion 4 is worn, the lubricating oil flows into the protective groove 5 for temporary storage, thereby preventing the lubricating oil from leaking, and then, the roller bearing 8 and the positioning bearing 11 are used to improve the rotation stability of the bearing sleeve 3.

[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A universal joint cross shaft, comprising a cross shaft body (1), characterized in that: The cross shaft body (1) comprises a plurality of connecting shafts (2), the outer wall of the connecting shaft (2) is sleeved with a bearing sleeve (3), the circumferential inner wall of the bearing sleeve (3) is integrally formed with a protrusion (4), the inner side of the protrusion (4) is provided with two protective grooves (5), one end of the connecting shaft (2) is provided with a thread groove (6), the inner thread of the thread groove (6) is inserted with a fixing bolt (7), the fixing bolt (7) is rotatably inserted with one end of the bearing sleeve (3), the circumferential outer wall of the connecting shaft (2) is sleeved with a roller bearing (8), the bearing sleeve (3) is sleeved on the outer side of the roller bearing (8), the circumferential outer wall of the connecting shaft (2) is sleeved with a first sealing ring (9) and a second sealing ring (10), the first sealing ring (9) and the second sealing ring (10) are located in the bearing sleeve (3).

2. A universal joint cross shaft according to claim 1, characterized in that: The protection groove (5) is an annular structure.

3. The universal joint cross shaft according to claim 1, characterized in that: The first sealing ring (9) and the second sealing ring (10) are respectively located on both sides of the raised portion (4).

4. The universal joint cross shaft according to claim 1, characterized in that: A locating bearing (11) is sleeved on the circumferential outer wall of the connecting shaft (2), and the bearing sleeve (3) is sleeved on the outer side of the locating bearing (11).

5. The universal joint cross shaft according to claim 1, characterized in that: The second sealing ring (10) is located between the locating bearing (11) and the raised portion (4).

6. The universal joint cross shaft according to claim 1, characterized in that: The first sealing ring (9) is located between the roller bearing (8) and the raised portion (4).

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