Cross universal coupling with protective structure

Abstract

The invention discloses a cross-shaped universal coupling with a protection structure, and relates to the technical field of universal couplings, the cross-shaped universal coupling comprises a connecting shaft, a shaft sleeve and a cross shaft, and further comprises sealing mechanisms arranged on the two sides of the inner wall of the shaft sleeve and used for conducting sealing protection between the connecting shaft and the shaft sleeve; the two limiting mechanisms are arranged on the two sides of the shaft sleeve correspondingly, each limiting mechanism comprises a first arc-shaped plate and a second arc-shaped plate, the first arc-shaped plates and the second arc-shaped plates are matched with the connecting shafts, and bending plates are arranged on the front side and the rear side of each first arc-shaped plate correspondingly. The connecting shaft and the shaft sleeve are sealed and protected, external dust particles, water and other pollutants are prevented from entering the position between the connecting shaft and the shaft sleeve, abrasion is reduced, noise is lowered, the service life of the coupler is prolonged, meanwhile, the limiting mechanism is detachable, the sealing mechanism can be taken out and replaced conveniently and rapidly, use is more convenient, and practicability is better.

Description

Technical Field

[0001] The invention relates to the technical field of universal couplings, in particular to a cross universal coupling with a protective structure. Background Art

[0002] A cross universal coupling (also called a cross shaft universal coupling) is a mechanical element used to connect two shafts for the purpose of transmitting rotational motion and torque between the two shafts. It has the characteristic of being able to provide a large angle compensation between the two shafts and is mainly used in application scenarios where angle adjustment is required or there is relative motion between the shafts.

[0003] Reference patent publication number CN219510041U is a wear-resistant cross-shaft universal coupling. When adjusting the length of the connecting shaft and the sleeve, the prior art can reduce the friction range between the connecting shaft and the sleeve, reduce the wear caused by friction, and at the same time, the outer wall of the connecting shaft and the inner wall of the sleeve are coated with a wear-resistant layer, thereby improving the wear resistance of the connecting shaft and the sleeve, thereby reducing wear during use and increasing service life. However, the patent has the following shortcomings: The connecting shaft and sleeve of the cross universal coupling do not have a protective structure during use. External dust particles, moisture and other contaminants can easily enter between the connecting shaft and the sleeve, making it difficult to clean. This will aggravate wear, increase noise during use, and shorten service life. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a cross universal coupling with a protective structure, which solves the problem that when the connecting shaft and the sleeve have no protective structure during use, external dust particles, moisture and other contaminants can easily enter between the connecting shaft and the sleeve.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A cross universal coupling with a protective structure, including a connecting shaft, a sleeve and a cross shaft, and also including: The sealing mechanism is arranged on both sides of the inner wall of the sleeve and is used for sealing and protecting the connection shaft and the sleeve; Two limiting mechanisms are respectively arranged on both sides of the shaft sleeve, and the limiting mechanisms include a first arc plate and a second arc plate adapted to the connecting shaft, and the front and rear sides of the first arc plate are both provided with bent plates, and one end of the bent plate that passes through the bottom of the second arc plate is provided with a movable groove, and one side of the inner wall of the movable groove is fixedly connected with a first spring, one end of the first spring is fixedly connected with a clamping rod, and the lower surface of the second arc plate is provided with a clamping groove adapted to the clamping rod; The positioning structure is arranged on the inner side of the limiting mechanism and is used for limiting the installation of the first arc plate and the second arc plate.

[0006] Preferably, the sealing mechanism includes an upper seal and a lower seal, and sealing grooves are provided on the inner sides of the upper seal and the lower seal, the inner walls of the sealing grooves are fixedly connected with spring steel sheets, and the side of the spring steel sheet away from the inner wall of the sealing grooves is fixedly connected with a steel plate, and the inner side of the steel plate is fixedly connected with an arc-shaped gasket that matches the sealing groove.

[0007] Preferably, one side of the first arc plate and the second arc plate are both provided with an arc groove adapted to the sealing mechanism, and both sides of the inner wall of the shaft sleeve are both provided with assembly grooves adapted to the sealing mechanism.

[0008] Preferably, the positioning structure comprises two protrusions, which are respectively arranged on the inner sides of the first arc plate and the second arc plate, and a plurality of grooves matching the protrusions are provided on the upper and lower sides of the surface of the connecting shaft.

[0009] Preferably, the interior of the sleeve is fixedly connected to a double-rod hydraulic cylinder via two upper and lower support rods, and the output end of the double-rod hydraulic cylinder is fixedly connected to an annular plate, and one side of the annular plate is fixedly connected to one end of the connecting shaft extending into the interior of the sleeve.

[0010] Preferably, a welding fork is provided at one end of the two connecting shafts which are away from each other, and a flange fork is provided inside the welding fork through a cross axis rotation, and a flange plate is fixedly connected to one side of the flange fork.

[0011] Preferably, bearing covers are provided at the four ends of the cross shaft, and roller needles are provided on the inner walls of the bearing covers. Oil seals are provided at the connecting openings between the bearing covers and the cross shaft, and a sealing plate is fixedly connected to the surface of the bearing cover and located on the outside of the oil seal.

[0012] Preferably, a lubricant injection port is provided at the top of the bearing cover, a piston is arranged inside the lubricant injection port, a sealing gasket is fixedly connected to the top of the piston, a sealing plate is fixedly connected to the top of the sealing gasket, and both sides of the top of the bearing cover are fixedly connected to fixing rods that penetrate to the outside of the sealing plate.

[0013] Preferably, a fixing groove is provided inside the sealing plate, and movable blocks are slidably provided on both sides of the inner wall of the fixing groove, a second spring is fixedly connected between the two movable blocks, an insertion rod penetrating to the outside of the fixing rod is fixedly connected to the opposite sides of the two movable blocks, and a handle penetrating to the top of the sealing plate is fixedly connected to the top of the two movable blocks.

[0014] The present invention provides a cross universal coupling with a protective structure, which has the following beneficial effects: (1) The cross universal coupling with a protective structure assembles the sealing mechanism on both sides of the sleeve through the limiting mechanism, thereby providing sealing protection between the connecting shaft and the sleeve, preventing external dust particles, moisture and other pollutants from entering between the connecting shaft and the sleeve, reducing wear and noise, and extending the service life of the coupling. At the same time, the limiting mechanism is detachable, which is convenient for quickly removing and replacing the sealing mechanism, making it more convenient to use and more practical.

[0015] (2) In the cross universal coupling with a protective structure, the sealing ring composed of two arc-shaped gaskets in the sealing mechanism is more tightly connected to the connecting shaft under the elastic force of the spring steel sheet, and the sealing performance is better. The spring steel sheet can make up for the elasticity lost by the sealing ring during long-term use, thereby extending the service life of the sealing mechanism and reducing the number of times it is replaced.

[0016] (3) The cross universal coupling with a protective structure uses a clamping mechanism to install the piston at the lubricant injection port to block it. The loading and unloading is simple and quick, which improves the efficiency of subsequent lubrication. Compared with the use of screw plugs, it can prevent loosening and rust, improve the installation stability of the structure, and prevent external dust from entering the bearing sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the structure of the present invention; Figure 2 It is a schematic diagram of the disassembly of the connecting shaft and the sleeve structure of the present invention; Figure 3 is a cross-sectional view of the shaft sleeve structure of the present invention; Figure 4 It is a side view of the limiting mechanism structure of the present invention; Figure 5 It is an installation cross-sectional view of the bent plate structure of the present invention; Figure 6 For the present invention Figure 3 A partial enlarged view of the middle A; Figure 7 A cross-sectional view of the sealing mechanism structure of the present invention; Figure 8 is a cross-sectional view of the cross-axis structure of the present invention; Fig. 9 For the present invention Figure 8 A local enlarged view of the S in the middle.

[0018] In the figure: 1, connecting shaft; 2, shaft sleeve; 3, cross shaft; 4, limiting mechanism; 41, first arc plate; 42, second arc plate; 43, bending plate; 44, movable groove; 45, first spring; 46, clamping rod; 47, clamping groove; 5, upper sealing member; 6, lower sealing member; 7, sealing groove; 8, spring steel sheet; 9, steel plate; 10, arc gasket; 11, arc groove; 12, assembly groove; 13, bump; 1 4. Groove; 15. Double-rod hydraulic cylinder; 16. Annular plate; 17. Welded fork; 18. Flange fork; 19. Flange; 20. Bearing cover; 21. Needle roller; 22. Oil seal; 23. Sealing plate; 24. Lubricant injection port; 25. Piston; 26. Sealing gasket; 27. Sealing plate; 28. Fixed rod; 29. ​​Fixed groove; 30. Movable block; 31. Second spring; 32. Insert rod; 33. Handle. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Embodiment 1 See also Figures 1 to 7 As shown, the present invention provides a cross universal coupling with a protective structure, comprising a connecting shaft 1, a shaft sleeve 2 and a cross shaft 3, and also comprising: The sealing mechanism is arranged on both sides of the inner wall of the sleeve 2 and is used to provide sealing protection between the connecting shaft 1 and the sleeve 2; Two limiting mechanisms 4 are respectively arranged on both sides of the shaft sleeve 2. The limiting mechanism 4 includes a first arc plate 41 and a second arc plate 42 adapted to the connecting shaft 1. The first arc plate 41 and the second arc plate 42 are assembled into a ring shape for fixing and assembling the sealing mechanism. The front and rear sides of the first arc plate 41 are both provided with a bending plate 43. The end of the bending plate 43 that passes through the bottom of the second arc plate 42 is provided with a movable groove 44. The end of the bending plate 43 that passes through the bottom of the second arc plate 42 is a bending end that can be rotated ninety degrees. A first spring 45 is fixedly connected to one side of the inner wall of the movable groove 44. A clamping rod 46 is fixedly connected to one end of the first spring 45. A clamping groove 47 adapted to the clamping rod 46 is provided on the lower surface of the second arc plate 42; A positioning structure, arranged on the inner side of the limiting mechanism 4, for limiting the installation of the first arc plate 41 and the second arc plate 42; The positioning structure includes two protrusions 13, which are respectively arranged on the inner sides of the first arc plate 41 and the second arc plate 42, and a plurality of grooves 14 adapted to the protrusions 13 are provided on both the upper and lower sides of the surface of the connecting shaft 1; The two connecting shafts 1 are provided with welding forks 17 at the opposite ends, and a flange fork 18 is rotatably provided inside the welding fork 17 through the cross shaft 3, and a flange plate 19 is fixedly connected to one side of the flange fork 18; The four ends of the cross shaft 3 are all provided with bearing covers 20, and the inner wall of the bearing cover 20 is provided with a needle roller 21, an oil seal 22 is provided at the connection opening between the bearing cover 20 and the cross shaft 3, and a sealing plate 23 is fixedly connected to the surface of the bearing cover 20 and located on the outside of the oil seal 22. The sealing plate 23 can seal and protect the oil seal 22 to prevent dust and the like from entering the oil seal 22.

[0021] Through the setting of the above structure, the limiting mechanism 4 assembles the sealing mechanism on both sides of the sleeve 2, and performs sealing protection between the connecting shaft 1 and the sleeve 2 to prevent external dust particles, moisture and other contaminants from entering between the connecting shaft 1 and the sleeve 2, thereby reducing wear and noise, and extending the service life of the coupling. At the same time, the limiting mechanism 4 is detachable, which is convenient for quickly removing and replacing the sealing mechanism, making it more convenient to use.

[0022] Embodiment 2 Based on Example 1, please refer to Figure 2 , Figure 6 and Figure 7 As shown, the specific improvements are as follows: the sealing mechanism includes an upper sealing member 5 and a lower sealing member 6, the inner sides of the upper sealing member 5 and the lower sealing member 6 are both provided with sealing grooves 7, the inner wall of the sealing groove 7 is fixedly connected with a spring steel sheet 8, and the side of the spring steel sheet 8 away from the inner wall of the sealing groove 7 is fixedly connected with a steel plate 9, the inner side of the steel plate 9 is fixedly connected with an arc-shaped gasket 10 adapted to the sealing groove 7, and the upper and lower arc-shaped gaskets 10 are assembled to form a sealing ring; An arc groove 11 adapted to the sealing mechanism is formed on one side of the first arc plate 41 and the second arc plate 42 , and an assembly groove 12 adapted to the sealing mechanism is formed on both sides of the inner wall of the sleeve 2 .

[0023] Through the arrangement of the above structure, the connection with the connecting shaft 1 is made tighter and the sealing is better, and the spring steel sheet 8 can make up for the elasticity lost by the arc-shaped gasket 10 during long-term use, thereby extending the service life of the sealing mechanism and reducing the number of times it is replaced.

[0024] Embodiment 3 In conjunction with Example 1 and Example 2, please refer to Figure 3As shown, the specific improvements are as follows: a double-rod hydraulic cylinder 15 is fixedly connected to the interior of the sleeve 2 via two upper and lower support rods, and an annular plate 16 is fixedly connected to the output end of the double-rod hydraulic cylinder 15, and one side of the annular plate 16 is fixedly connected to one end of the connecting shaft 1 extending to the interior of the sleeve 2.

[0025] Through the arrangement of the above structure, the double-rod hydraulic cylinder 15 can adjust the length of the coupling, and is flexible to use and can be adapted to various usage requirements.

[0026] Embodiment 4 In conjunction with Embodiments 1 to 3, please refer to Figure 8 and Fig. 9 As shown, the specific improvements are as follows: a lubricant injection port 24 is provided at the top of the bearing cover 20, a piston 25 is provided inside the lubricant injection port 24, a sealing gasket 26 is fixedly connected to the top of the piston 25, a sealing plate 27 is fixedly connected to the top of the sealing gasket 26, and both sides of the top of the bearing cover 20 are fixedly connected to fixing rods 28 that penetrate to the outside of the sealing plate 27; A fixing groove 29 is provided inside the sealing plate 27, and movable blocks 30 are slidably provided on both sides of the inner wall of the fixing groove 29, a second spring 31 is fixedly connected between the two movable blocks 30, and an insertion rod 32 penetrating to the outside of the fixing rod 28 is fixedly connected to the opposite sides of the two movable blocks 30, and a handle 33 penetrating to the top of the sealing plate 27 is fixedly connected to the top of the two movable blocks 30.

[0027] Through the arrangement of the above structure, the piston 25 and the sealing gasket 26 block the lubricant injection port 24, and the sealing performance is better. Compared with the use of a screw plug, it can prevent loosening and rust, improve the installation stability of the structure, and prevent external dust from entering the interior of the bearing sleeve. At the same time, the arrangement of structures such as the fixed rod 28, the movable block 30, the second spring 31, the plug 32 and the handle 33 facilitates the loading and unloading of the piston 25, which is simple and quick, and improves the efficiency of subsequent lubrication.

[0028] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment compatible with the equipment can be used.

[0029] When in use, the sealing mechanism is assembled on both sides of the shaft sleeve 2, and then the first curved plate 41 and the second curved plate 42 are assembled on the surface of the shaft sleeve 2, the protrusion 13 enters the corresponding groove 14, and the installation position of the first curved plate 41 and the second curved plate 42 is limited, and then the bent plate 43 passes through the first curved plate 41 and the second curved plate 42, and the passed part is bent ninety degrees. Under the elastic force of the first spring 45, the clamping rod 46 enters the clamping groove 47 to complete the fixed installation between the first curved plate 41 and the second curved plate 42, so that the sealing mechanism can be limited and protected. When the sealing mechanism needs to be replaced, the clamping rod 46 is driven to move out of the clamping groove 47, and the bent plate 43 is rotated into a straight state and then pulled out, so that the first curved plate 41 and the second curved plate 42 can be disassembled, so that the sealing mechanism can be directly taken out of the shaft sleeve 2 for replacement; During the use of the sealing mechanism, the two arc-shaped gaskets 10 are assembled into a sealing ring. Under the extrusion of the spring steel sheet 8, the steel plate 9 is driven to squeeze the arc-shaped gasket 10, so that the connection with the connecting shaft 1 is tighter and the sealing is better. The elasticity of the spring steel sheet 8 can make up for the lost elasticity of the arc-shaped gasket 10, which can extend the service life of the sealing mechanism and reduce the number of times it is replaced. By starting the double-rod hydraulic cylinder 15, the connecting shafts 1 on both sides are driven to move left and right, so that the length of the coupling can be adjusted to increase its applicable range. When the universal coupling is in use, the sealing gasket 26 and the piston 25 seal and block the lubricant injection port 24 of the cross shaft 3 to prevent dust from entering the bearing cover 20. By pulling the two handles 33 on the sealing plate 27, the movable block 30 is driven to squeeze the second spring 31, so that the insertion rod 32 is moved out of the fixed rod 28, so that the sealing plate 27 can be moved upward, driving the piston 25 to pull out the lubricant injection port 24, so as to facilitate the injection of lubricating oil.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cross universal coupling with a protective structure, comprising a connecting shaft (1), a shaft sleeve (2) and a cross shaft (3), characterized in that: Also includes: A sealing mechanism, arranged on both sides of the inner wall of the shaft sleeve (2), and used for sealing and protecting between the connecting shaft (1) and the shaft sleeve (2); Two limiting mechanisms (4) are respectively arranged on both sides of the shaft sleeve (2), the limiting mechanisms (4) comprising a first arc plate (41) and a second arc plate (42) adapted to the connecting shaft (1), the first arc plate (41) being provided with a bending plate (43) on both the front and rear sides, the bending plate (43) penetrating to one end below the second arc plate (42) and having a movable groove (44), and a first spring (45) being fixedly connected to one side of the inner wall of the movable groove (44), one end of the first spring (45) being fixedly connected to a clamping rod (46), and a clamping groove (47) adapted to the clamping rod (46) being provided on the lower surface of the second arc plate (42); The positioning structure is arranged on the inner side of the limiting mechanism (4) and is used for limiting the installation of the first arc plate (41) and the second arc plate (42).

2. The cross universal coupling with a protective structure according to claim 1, characterized in that: The sealing mechanism comprises an upper sealing member (5) and a lower sealing member (6), wherein a sealing groove (7) is provided on the inner side of each of the upper sealing member (5) and the lower sealing member (6), wherein a spring steel sheet (8) is fixedly connected to the inner wall of the sealing groove (7), and a steel plate (9) is fixedly connected to the side of the spring steel sheet (8) away from the inner wall of the sealing groove (7), and an arc-shaped gasket (10) matching the sealing groove (7) is fixedly connected to the inner side of the steel plate (9).

3. The cross universal coupling with a protective structure according to claim 1, characterized in that: An arc groove (11) adapted to the sealing mechanism is provided on one side of the first arc plate (41) and the second arc plate (42), and assembly grooves (12) adapted to the sealing mechanism are provided on both sides of the inner wall of the shaft sleeve (2).

4. The cross universal coupling with a protective structure according to claim 1, characterized in that: The positioning structure comprises two protrusions (13), the two protrusions (13) being arranged on the inner sides of the first arc plate (41) and the second arc plate (42) respectively, and a plurality of grooves (14) matching the protrusions (13) are provided on both upper and lower sides of the surface of the connecting shaft (1).

5. The cross universal coupling with a protective structure according to claim 1, characterized in that: A double-rod hydraulic cylinder (15) is fixedly connected to the interior of the shaft sleeve (2) via two upper and lower support rods, and an annular plate (16) is fixedly connected to the output end of the double-rod hydraulic cylinder (15), and one side of the annular plate (16) is fixedly connected to one end of the connecting shaft (1) extending to the interior of the shaft sleeve (2).

6. The cross universal coupling with a protective structure according to claim 1, characterized in that: A welding fork (17) is provided at one end of the two connecting shafts (1) that are separated from each other, and a flange fork (18) is rotatably provided inside the welding fork (17) via a cross shaft (3), and a flange plate (19) is fixedly connected to one side of the flange fork (18).

7. The cross universal coupling with a protective structure according to claim 1, characterized in that: The four ends of the cross shaft (3) are each provided with a bearing cover (20), and the inner wall of the bearing cover (20) is provided with a needle roller (21), an oil seal (22) is provided at the connection opening between the bearing cover (20) and the cross shaft (3), and a sealing plate (23) is fixedly connected to the surface of the bearing cover (20) and located outside the oil seal (22).

8. The cross universal coupling with a protective structure according to claim 7, characterized in that: A lubricant injection port (24) is provided at the top of the bearing cover (20), a piston (25) is provided inside the lubricant injection port (24), a sealing gasket (26) is fixedly connected to the top of the piston (25), a sealing plate (27) is fixedly connected to the top of the sealing gasket (26), and fixing rods (28) that penetrate the outside of the sealing plate (27) are fixedly connected to both sides of the top of the bearing cover (20).

9. The cross universal coupling with a protective structure according to claim 8, characterized in that: A fixing groove (29) is provided inside the sealing plate (27), and movable blocks (30) are slidably provided on both sides of the inner wall of the fixing groove (29), a second spring (31) is fixedly connected between the two movable blocks (30), an insertion rod (32) penetrating the outside of the fixing rod (28) is fixedly connected to the opposite sides of the two movable blocks (30), and a handle (33) penetrating the top of the sealing plate (27) is fixedly connected to the top of the two movable blocks (30).

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