Cross shaft coupling
By introducing micro deep groove ball bearings and lubrication systems into the cross shaft coupling, the problem of insufficient universal angle correction capability of existing cross shaft couplings is solved, and a larger correction angle and lower noise are achieved.
Patent Information
- Application Number
- CN202421680899.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-05-20
- Estimated Expiration
- 2034-07-16
AI Technical Summary
The existing cross shaft coupling has a small universal angle correction capability, and can only adjust ±2° at most, which cannot meet the needs of greater angle correction.
A cross shaft coupling is designed, by providing a miniature deep groove ball bearing in the inner bore of the coupling bushing and slidingly connecting with the protruding shaft of the coupling intermediate, relative rotation is achieved, increasing the deviation correction angle, and at the same time, an interference fit and lubrication system are used to reduce noise.
Adjustment with a maximum deviation correction angle of ±5° is achieved, which significantly improves the universal angle deviation correction ability and reduces noise during use.
Smart Images
Figure CN222887156U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of machinery, in particular to a cross shaft coupling. Background Art
[0002] The cross shaft coupling is one of the most commonly used couplings. By virtue of its structural characteristics, it can enable two shafts that are not on the same axis or have a large angular deflection or large axial movement to rotate continuously at equal angular velocity, and reliably transmit torque and motion. It can be widely applied to the industries of hoisting, engineering transportation, mining, petroleum, shipbuilding, coal, rubber, papermaking machinery and other heavy machinery industries.
[0003] The existing cross shaft coupling mainly consists of a coupling body, a connecting block, a flat head screw and an inner hexagon socket head cap screw. The coupling body of the existing cross shaft coupling is threadedly connected with the connecting block through the flat head screw, and the inner hexagon socket head cap screw is threadedly connected to the coupling body.
[0004] The existing cross shaft coupling can transmit torque, and achieve the deviation correction effect by the relative rotation of the intermediate connecting block and the coupling body. After calculating the distance between the bosses of the cross shaft coupling, the maximum universal angle deviation correction can only be adjusted by ±2°. Summary of the Utility Model
[0005] In order to overcome the shortcoming of the small universal angle deviation correction of the existing cross shaft coupling, the purpose of the utility model is to provide a cross shaft coupling with a large universal angle deviation correction.
[0006] A cross shaft coupling includes a coupling intermediate body; coupling bushings, the coupling bushings are circumferentially distributed on the coupling intermediate body, the number of the coupling bushings is four, and inner holes are respectively opened on one sides of the coupling bushings close to the coupling intermediate body; miniature deep groove ball bearings, the miniature deep groove ball bearings are connected to the inner holes of the coupling bushings, and the miniature deep groove ball bearings are connected with the coupling bushings by interference fit; a coupling body and inner hexagon socket head cap screws, the coupling body is threadedly connected between the mutually remote coupling bushings through the inner hexagon socket head cap screws respectively, and the coupling body is arranged front and back; coupling side screws, the coupling side screws are respectively installed on the two coupling bodies; an oil filling seat, the oil filling seat is bolted to one side of the coupling bushing away from the coupling intermediate body; an oil filling pipe, the oil filling pipe is fixedly connected to the right side of the oil filling seat; and a threaded plug, the threaded plug is threadedly connected to the top of the oil filling pipe.
[0007] Preferably, arc small cutouts are respectively opened on one sides of the coupling bushings close to the coupling intermediate body.
[0008] Preferably, four protruding shafts are circumferentially and uniformly distributed on the coupling intermediate body. The protruding shafts are fixedly connected to the coupling intermediate body, and the protruding shafts are slidably connected to the miniature deep groove ball bearings. The coupling intermediate body is fixedly connected to the coupling bushing through the protruding shafts.
[0009] Preferably, oil storage grooves are formed on both the left and right sides inside the oil injection seat. The oil storage groove near the threaded plug is communicated with the oil injection pipe. Two first oil guiding holes are formed on the upper side inside the oil injection seat, and a second oil guiding hole is formed in the middle side inside the oil injection seat. The right first oil guiding hole is communicated with the oil storage groove, and the first oil guiding holes are all communicated with the second oil guiding hole. The second oil guiding hole passes through the coupling bushing and is located at the top of the miniature deep groove ball bearing. A connecting pipe is further included. The connecting pipe is fixedly connected between the left and right oil storage grooves, and the left and right oil storage grooves are communicated through the connecting pipe.
[0010] Preferably, a fixing rod and fixing blocks are further included. One fixing rod and two fixing blocks are fixedly connected to the top of the first oil guiding hole. Rotating plates, the two rotating plates are rotatably connected to the fixing rod. The two rotating plates are symmetrically arranged left and right, and the bottoms of the rotating plates are in contact with the two fixing blocks. A torsion spring is fixedly connected to the connection between the two rotating plates and the fixing rod.
[0011] Preferably, a dust-proof net is further included, and the dust-proof net is installed inside the oil injection pipe.
[0012] Preferably, the connecting pipe is located outside the oil injection seat, and the connecting pipe is made of a transparent material.
[0013] Preferably, the number of the connecting pipes is two, and the two connecting pipes are symmetrically arranged front and back.
[0014] Preferably, the second oil guiding hole is in the shape of a circular pipe.
[0015] Preferably, the number of the oil injection seats is four, and the four oil injection seats are circumferentially and uniformly distributed on the side of the coupling bushing away from the coupling intermediate body.
[0016] Compared with the prior art, the utility model has the following advantages: By arranging a miniature deep groove ball bearing, the miniature deep groove ball bearing is connected to the inner hole of the coupling bushing by interference fit. The four protruding shafts of the coupling intermediate body are all slidably connected to the corresponding miniature deep groove ball bearings, and the coupling intermediate body is fixedly connected to the coupling bushing through the protruding shafts thereon. The miniature deep groove ball bearing can rotate relatively in the inner hole of the coupling bushing without obvious clearance and axial movement. When the maximum deviation correction angle of the utility model is ±5°, the noise during the use of the utility model can be greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 FIG. is a three-dimensional structural schematic diagram of the utility model.
[0018] Figure 2 FIG. is a separated view of structures such as the coupling intermediate body and the coupling bushing of the utility model.
[0019] Figure 3 FIG. is a three-dimensional structural schematic diagram of structures such as the coupling bushing, the oil injection seat and the oil injection pipe of the utility model.
[0020] Figure 4 FIG. is a sectional view of the oil injection seat of the utility model.
[0021] Figure 5 FIG. is a schematic diagram of structures such as the fixing rod, the rotating plate and the fixing block of the utility model.
[0022] Figure 6 FIG. is a schematic diagram of structures such as the oil injection pipe, the threaded plug and the dust-proof net of the utility model.
[0023] In the reference numerals of the drawings: 1 - coupling body, 2 - coupling intermediate body, 201 - small arc notch, 202 - protruding shaft, 3 - coupling bushing, 4 - miniature deep groove ball bearing, 5 - hexagon socket head cap screw, 6 - coupling side screw, 7 - oil injection seat, 71 - oil storage tank, 72 - first oil guiding hole, 73 - second oil guiding hole, 8 - connecting pipe, 9 - oil injection pipe, 10 - threaded plug, 11 - fixing rod, 111 - torsion spring, 12 - rotating plate, 13 - fixing block, 14 - dust-proof net. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0024] It should be noted first that in the embodiments described differently, the same components are provided with the same reference numerals or the same component names. Among them, the disclosure content included in the entire specification can be meaningfully applied to the same components with the same reference numerals or the same component names. The positional descriptions selected in the specification, such as up, down, lateral, etc., also refer to the directly described and shown drawings and are meaningfully applied to the new positions when the positions change.
[0025] A cross shaft coupling, as Figures 1 - 6 shown, includes a coupling body 1, a coupling intermediate body 2, a coupling bushing 3, a miniature deep groove ball bearing 4, an internal hexagon socket head cap screw 5, a coupling side nail 6, an oil filling seat 7, an oil filling pipe 9 and a threaded plug 10. Four coupling bushings 3 are circumferentially and evenly distributed on the coupling intermediate body 2. Inner holes are opened on one side of the coupling bushings 3 close to the coupling intermediate body 2. Miniature deep groove ball bearings 4 are connected to the inner holes of the coupling bushings 3. The coupling body 1 is threadedly connected between the mutually remote coupling bushings 3 through the internal hexagon socket head cap screws 5. The coupling body 1 is arranged front and back. Coupling side nails 6 are installed on both coupling bodies 1. When using this cross shaft coupling, connect the motor output shaft with the rotating shaft. Oil filling seats 7 are bolted to one side of the coupling bushings 3 away from the coupling intermediate body 2. Oil filling pipes 9 are fixedly connected to the right sides of the oil filling seats 7. Threaded plugs 10 are bolted to the tops of the oil filling pipes 9. The oil filling seats 7 can flow lubricating oil into the miniature deep groove ball bearings 4 for lubrication treatment, prevent friction and wear inside the miniature deep groove ball bearings 4, and extend the service life of the miniature deep groove ball bearings 4, so as to ensure that this cross shaft coupling can achieve the adjustment of the maximum deviation angle. During the rotation of this cross shaft coupling, through the miniature deep groove ball bearings 4, the coupling body 1 can transmit torque at the limit deviation angle, so that this cross shaft coupling can achieve the adjustment of the maximum deviation angle of ±5°. After using for a period of time, lubricating oil needs to be added to the miniature deep groove ball bearings 4. Rotate the threaded plug 10 to make it away from the oil filling pipe 9, and then inject the lubricating oil into the oil filling seat 7 through the oil filling pipe 9. After injection, rotate the threaded plug 10 back to its original position.
[0026] As Figure 1 and Figure 2 shown, arc small cuts 201 are opened on one side of the coupling bushings 3 close to the coupling intermediate body 2. When using this cross shaft coupling, the arc small cuts 201 can prevent the coupling bushings 3 from colliding with the coupling body 1 and avoid damage to this cross shaft coupling due to collision between parts.
[0027] As Figure 1 , Figure 2 and Figure 3 shown, the miniature deep groove ball bearings 4 are connected with the coupling bushings 3 by interference fit. Four protruding shafts 202 are fixedly connected circumferentially on the coupling intermediate body 2. The protruding shafts 202 are all slidably connected with the corresponding miniature deep groove ball bearings 4. The coupling intermediate body 2 is fixedly connected with the coupling bushings 3 through the protruding shafts 202 on it, which can greatly reduce the noise generated when this cross shaft coupling is running. During the operation of this cross shaft coupling, the coupling body 1 and the coupling bushings 3 can rotate relative to each other in the inner holes of the coupling bushings 3, and there is no obvious gap and no axial movement at the same time.
[0028] As shown Figures 3 - 5 in the figure, it further includes a connecting pipe 8. Oil storage grooves 71 are formed on both the left and right sides inside the oil injection seat 7. The oil storage groove 71 near the threaded plug 10 is communicated with the oil injection pipe 9. Two first oil guiding holes 72 are formed on the upper side inside the oil injection seat 7, and a second oil guiding hole 73 is formed in the middle side inside the oil injection seat 7. The first oil guiding holes 72 are communicated with the corresponding oil storage grooves 71, and the first oil guiding holes 72 are all communicated with the second oil guiding hole 73. The second oil guiding hole 73 passes through the coupling bushing 3 and is located at the top of the corresponding miniature deep groove ball bearing 4. A connecting pipe 8 is fixedly connected between the left and right oil storage grooves 71, and the left and right oil storage grooves 71 are communicated through the connecting pipe 8. When the cross shaft coupling rotates at a high speed, due to the influence of centrifugal force, the lubricating oil in the oil storage groove 71 moves along the first oil guiding hole 72 to the upper part of the first oil guiding hole 72. When the cross shaft coupling rotates slowly, the lubricating oil above the first oil guiding hole 72 will flow into the second oil guiding hole 73.
[0029] When lubrication treatment needs to be carried out on the miniature deep groove ball bearing 4, after injecting the lubricating oil from the oil injection pipe 9, the lubricating oil will first fall into the right oil storage groove 71, and then through the connecting pipe 8, the lubricating oil in the right oil storage groove 71 will flow into the left oil storage groove 71, so that there is lubricating oil in both oil storage grooves 71. After resetting the threaded plug 10, the cross shaft coupling is continued to be used, and the lubricating oil flows into the miniature deep groove ball bearing 4 through the first oil guiding hole 72 and the second oil guiding hole 73, thereby lubricating the miniature deep groove ball bearing 4, reducing the friction and wear inside the miniature deep groove ball bearing 4, extending the service life of the miniature deep groove ball bearing 4, enhancing the performance, and also preventing rust and corrosion caused by foreign objects invading the bearing interior.
[0030] As shown Figure 4 and Figure 5As shown in the figure, it further includes a fixed rod 11, a rotating plate 12 and a fixed block 13. At the top of each first oil guiding hole 72, a fixed rod 11 and two fixed blocks 13 are fixedly connected. Two rotating plates 12 are rotatably connected to each fixed rod 11. At the connection between the two rotating plates 12 and the fixed rod 11, a torsion spring 111 is fixedly connected. Under the action of the torsion spring 111, gravity cannot make the two rotating plates 12 rotate. A relatively large force is required to make the two rotating plates 12 rotate on the fixed rod 11. The corresponding two rotating plates 12 are symmetrically arranged left and right. Both fixed blocks 13 are in contact with the bottom of the corresponding rotating plate 12. Therefore, when the lubricating oil moves under the influence of centrifugal force, the lubricating oil will squeeze the bottom of the rotating plate 12, so that the rotating plates 12 all rotate upward to expose the gaps, and the lubricating oil flows into the upper part of the first oil guiding hole 72 through the gaps. When the cross shaft coupling rotates slowly, the lubricating oil no longer squeezes the bottom of the rotating plate 12, so that the rotating plate 12 resets and contacts the fixed block 13, and part of the lubricating oil above the first oil guiding hole 72 will stay on the top of the rotating plate 12. The rotating plate 12 can prevent the lubricating oil from flowing back into the oil storage tank 71, ensuring that enough lubricating oil can enter the miniature deep groove ball bearing 4.
[0031] As Figure 6 shown, it further includes a dust-proof net 14. A dust-proof net 14 for blocking dust and other impurities in the air is installed inside the oil injection pipe 9. When injecting lubricating oil into the oil injection pipe 9, the inside of the oil injection pipe 9 will be exposed to the air. The dust-proof net 14 can prevent the lubricating oil in the oil injection seat 7 from being contaminated, thereby preventing the miniature deep groove ball bearing 4 from being contaminated.
[0032] As Figure 1 、 Figure 3 and Figure 4 shown, the side of the connecting pipe 8 far from the oil storage tank 71 is located outside the oil injection seat 7, and the connecting pipe 8 is made of a transparent material. Whether lubricating oil needs to be added to the oil injection seat 7 is judged by the amount of lubricating oil in the transparent connecting pipe 8, so as to facilitate the addition of lubricating oil. When the amount of lubricating oil in the connecting pipe 8 is less, lubricating oil needs to be added to the oil injection pipe 9, otherwise no lubricating oil needs to be added.
[0033] As Figure 1 、 Figure 3 and Figure 4 shown, the number of the connecting pipes 8 is two, and the two connecting pipes 8 are symmetrically arranged front and back. By connecting the left and right oil storage tanks 71 through the front and rear two connecting pipes 8, it can prevent one connecting pipe 8 from being blocked, resulting in the inability to normally use the oil storage tank 71 on the side far from the oil injection pipe 9.
[0034] As Figure 4As shown, the second oil guiding hole 73 is of a round tube type, and the inner and outer diameters of the second oil guiding hole 73 are equal to the inner and outer diameters of the miniature deep groove ball bearing 4. When lubricating the miniature deep groove ball bearing 4, the lubricating oil can lubricate the entire miniature deep groove ball bearing 4 through the second oil guiding hole 73 to ensure the lubrication effect and avoid wear of the miniature deep groove ball bearing 4.
[0035] As Figure 1 shown, the number of the oil injection seats 7 is four, and the four oil injection seats 7 are circumferentially and evenly distributed on one side of the coupling bushing 3 away from the coupling intermediate body 2. Injecting lubricating oil into the four oil injection seats 7 can lubricate the four miniature deep groove ball bearings 4 simultaneously. Moreover, since the oil injection seats 7 are bolted to the coupling bushing 3, the oil injection seats 7 can be removed at any time to facilitate the maintenance and repair of this cross shaft coupling.
[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.
Claims
1. A cross shaft coupling, characterized in that: include: Coupling intermediate (2); A coupling bushing (3), wherein the coupling bushing (3) is evenly distributed on the coupling intermediate body (2) in the circumferential direction, the number of the coupling bushings (3) is four, and the coupling bushings (3) are each provided with an inner hole on a side close to the coupling intermediate body (2); A miniature deep groove ball bearing (4), the miniature deep groove ball bearing (4) is connected to the inner hole of the coupling bushing (3), and the miniature deep groove ball bearing (4) is connected to the coupling bushing (3) by interference fit; a coupling body (1) and a hexagon socket head screw (5), the coupling body (1) is threadedly connected to the coupling bushings (3) which are separated from each other through the hexagon socket head screw (5), The coupling body (1) is arranged front and back; Coupling side nails (6), the coupling side nails (6) are installed on the two coupling bodies (1); An oil filling seat (7), the oil filling seat (7) being threadedly connected to a side of the coupling bushing (3) away from the coupling intermediate body (2); An oil filling pipe (9), the oil filling pipe (9) being fixedly connected to the right side of the oil filling seat (7); and A threaded plug (10) is threadedly connected to the top of the oil filling pipe (9).
2. A cross-shaft coupling according to claim 1, characterized in that: A small arc cutout (201) is formed on one side of the coupling bushing (3) close to the coupling intermediate body (2).
3. A cross-shaft coupling according to claim 1, characterized in that: Also includes: A protruding shaft (202), the coupling intermediate body (2) has four protruding shafts (202) evenly distributed in the circumferential direction, the protruding shafts (202) are all fixedly connected to the coupling intermediate body (2), the protruding shafts (202) are all slidably connected to the miniature deep groove ball bearing (4), and the coupling intermediate body (2) is fixedly connected to the coupling bushing (3) through the protruding shafts (202).
4. A cross-shaft coupling according to claim 2, characterized in that: The oil filling seat (7) is provided with oil storage grooves (71) on both the left and right sides. The oil storage groove (71) on the side close to the threaded plug (10) is connected to the oil filling pipe (9). The upper side of the oil filling seat (7) is provided with two first oil guide holes (72). The middle side of the oil filling seat (7) is provided with a second oil guide hole (73). The first oil guide hole (72) on the right side is connected to the oil storage groove (71). The first oil guide holes (72) are connected to the second oil guide holes (73). The second oil guide holes (73) pass through the coupling bushing (3). And the second oil guide hole (73) is located at the top of the miniature deep groove ball bearing (4); A connecting pipe (8), wherein the connecting pipe (8) is fixedly connected between the left and right oil storage tanks (71), and the left and right oil storage tanks (71) are connected via the connecting pipe (8).
5. A cross-shaft coupling according to claim 4, characterized in that: Also includes: A fixing rod (11), wherein the fixing rod (11) is fixedly connected to the top of the first oil guide hole (72); A fixed block (13), wherein the two fixed blocks (13) are both fixedly connected to the top of the first oil guide hole (72); Rotating plates (12), the two rotating plates (12) are both rotatably connected to the fixed rod (11), the two rotating plates (12) are arranged symmetrically, and the bottoms of the rotating plates (12) are in contact with the two fixed blocks (13); and A torsion spring (111), wherein the torsion spring (111) is fixedly connected to the connection between the two rotating plates (12) and the fixed rod (11).
6. A cross-shaft coupling according to claim 5, characterized in that: Also includes: A dustproof net (14), the dustproof net (14) is installed inside the oil filling pipe (9).
7. A cross-shaft coupling according to claim 6, characterized in that: The connecting pipe (8) is located outside the oil filling seat (7), and the connecting pipe (8) is made of a transparent material.
8. A cross-shaft coupling according to claim 7, characterized in that: The number of the connecting pipes (8) is two, and the two connecting pipes (8) are symmetrically arranged front and back.
9. A cross-shaft coupling according to claim 8, characterized in that: The second oil guide hole (73) is a circular tube.
10. A cross-shaft coupling according to claim 9, characterized in that: The number of the oil filling seats (7) is four, and the four oil filling seats (7) are evenly distributed in the circumferential direction on the side of the coupling bushing (3) away from the coupling intermediate body (2).