CN114017448A - Cross bearing universal coupling - Google Patents

Abstract

A cross bearing universal coupling comprises cross bearing universal coupling fork heads, polygonal pin shafts and cross bearings, wherein the cross bearings are used as one part and are connected and assembled with the cross bearing universal coupling fork heads at two ends through the polygonal pin shafts; an oiling through hole is formed in the center of the polygonal pin shaft; the cross bearing is composed of a cross bearing block, a rolling body and a bearing outer cover, four surfaces of the cross bearing block are respectively provided with a roller path, an oil filling hole is arranged in the cross bearing block, and the oil filling hole is communicated with the oil filling through hole; the center part of the bearing outer cover is provided with a polygonal shaft hole matched with the polygonal pin shaft, the inner surface of the bearing outer cover is also provided with a roller path, and the roller path on the cross bearing block and the roller path on the bearing outer cover have the same diameter; a plurality of rolling bodies are arranged in the roller paths on the cross bearing blocks, and four surfaces of the cross bearing block are respectively embedded into the outer cover of the bearing. Compared with the prior art, the novel transmission device has the characteristics of large transmission torque, high rotating speed, large axis break angle alpha, long service life, high transmission efficiency, environmental protection and the like.

Description

Cross bearing universal coupling

Technical Field

The invention relates to a universal coupling, in particular to a cross bearing universal coupling.

Background

At present, the universal coupling with the crosshead shoe has wide application in the mechanical industry, and has the characteristics of large angular displacement, flexible rotation, stable and accurate transmission motion and the like. The structure is shown in figure 1, wherein the joint A-A section is shown in figure 2. The universal coupling structure of the crosshead shoe comprises: the crosshead 2 is arranged between two forks 1 of a crosshead universal coupling, and the forks 1 of the crosshead universal coupling are in a 90-degree direction; the pin 4 crosses and connects a crosshead 1 and a crosshead 2 of the universal joint coupling; the pin assembly 3 traverses and connects the other Oldham coupling clevis 1, the pin 4, and the Oldham 2. In which the pin 4 and the pin assembly 3 only play a connecting role and are theoretically not subjected to lateral loads. The working principle of the crosshead shoe universal coupling is as follows: when the universal coupling is used for transmitting torque, the universal coupling fork head 1 with the crosshead shoe at one end rotates, and the crosshead shoe 2 is forced to rotate by virtue of a plane in contact with the crosshead shoe 2; then the crosshead 2 forces the other end crosshead 1 of the crosshead universal coupling to rotate by means of the plane which is in contact with the other end crosshead 1 of the universal coupling. This completes the transfer of torque and motion from one end of the oldham universal coupling to the other. When the universal coupling with the cross sliding blocks works, the fork heads 1 of the universal coupling with the cross sliding blocks have an axial line folding angle alpha (see attached figure 3). In the torque and motion processes, the contact surface of the universal coupling fork head 1 and the crosshead shoe 2 of the crosshead shoe has sliding friction, and the larger the angle alpha of the axis is, the larger the sliding friction angle is. It has the following disadvantages:

(1) the cross-shaped sliding block universal coupling belongs to a universal coupling, an axis break angle alpha is inevitably formed during equipment installation, and during work, torque and motion are transmitted by means of friction of contact surfaces of a cross-shaped sliding block universal coupling fork head 1 and a cross-shaped sliding block 2. Therefore, the contact surface of the crosshead shoe universal coupling fork head 1 and the crosshead shoe 2 generates heat and is abraded, even if lubricating oil (grease) exists, the larger the axial line break angle alpha is or the larger the transmission torque is, the more serious the heat generation and the abrasion are.

(2) Since the oldham coupling generates heat and wears during torque and motion transmission, the transmission of large torque and high-speed use are severely limited.

(3) When the crosshead shoe universal coupling is used for transmitting large torque, additional lubricating and cooling systems are often needed, such as: the oil is sprayed from top to bottom, and the oil receiving disc is arranged below the oil spraying disc, so that the environment is polluted and the oil spraying disc is inconvenient.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides the universal coupling with the cross bearing, which completely replaces the existing universal coupling with the cross slide block and has the performance far better than that of the existing universal coupling with the cross slide block.

In order to achieve the purpose, the invention adopts the following solution: a cross bearing universal coupling comprises cross bearing universal coupling fork heads, polygonal pin shafts and cross bearings, wherein the cross bearings are used as one part and are connected and assembled with the cross bearing universal coupling fork heads at two ends through the polygonal pin shafts; an oiling through hole is processed at the center of the polygonal pin shaft; the cross bearing is composed of a cross bearing block, a rolling body and a bearing outer cover, four surfaces of the cross bearing block are respectively provided with a roller path, an oil filling hole is processed in the cross bearing block, and the oil filling hole is communicated with the oil filling through hole; a polygonal shaft hole matched with the polygonal pin shaft is processed at the central part of the bearing outer cover, a roller path is also processed on the inner surface of the bearing outer cover, and the diameter of the roller path processed on the cross bearing block is the same as that of the roller path processed on the bearing outer cover; a plurality of rolling bodies are arranged in a roller path processed on the cross bearing block, and four surfaces of the cross bearing block are respectively embedded into the outer cover of the bearing.

The bearing cross block is characterized in that two raceways are processed on the cross bearing block, namely a raceway I and a raceway II, two raceways are processed on the bearing outer cover, namely a raceway III and a raceway IV, the diameters of the raceway I and the raceway II are the same as those of the raceway III and the raceway IV, a plurality of rolling bodies are respectively placed in the raceway I and the raceway II, and four surfaces of the bearing cross block are respectively embedded into the bearing outer cover.

The outer cylindrical surface of the bearing outer cover is provided with a sealing groove, and a sealing ring is embedded in the sealing groove.

The oil filling through hole is partially processed into threads, and the screw plug is screwed into the oil filling through hole.

The central part of the cross bearing block is processed into an oil storage chamber.

The working principle of the cross bearing universal coupling is as follows: when the universal coupling is used for transmitting torque, the cross bearing universal coupling fork at one end rotates, pressure is applied to the cross bearing by virtue of the plane in contact with the outer cover of the bearing, the cross bearing forces the cross bearing universal coupling fork at the other end to rotate by virtue of the plane in contact with the cross bearing universal coupling fork at the other end, and thus the torque and the motion are transmitted from one end of the cross bearing universal coupling to the other end. When the cross-shaped bearing universal coupling works and the two cross-shaped bearing universal coupling forks have the axial line break angle alpha, the cross-shaped bearing universal coupling forks rotate through the rolling bodies in the cross-shaped bearing and bear torque. The polygonal pin shaft forces the outer bearing cover in the cross bearing and the fork head of the cross bearing universal coupling to synchronously rotate. The axial angle alpha of the cross bearing universal coupling can reach 45 degrees at most. When the universal coupling of the cross bearing is lubricated, the screw plug can be detached to perform oil injection through the oil injection through hole of the polygonal pin shaft. The central part of the cross block bearing is processed into an oil storage chamber, so that the oil storage amount is larger.

The cross bearing universal coupling and the existing cross slide block universal coupling have the following characteristics:

(1) the transmission torque is large. Due to the adoption of the cross bearing structure, the materials and the hardness of the outer bearing cover, the rolling body and the cross bearing block are designed according to the bearing, the bearing can be provided with double rolling ways for bearing, and the bearing capacity is far greater than that of a cross sliding block universal coupling.

(2) The rotating speed is high. Because a cross bearing structure is adopted, lubricating grease is used for lubrication, the cross bearing universal coupling rotates, and the temperature rise is low; meanwhile, the rotation is flexible, and the device is suitable for high-speed work.

(3) The axial folding angle alpha is large. Due to the adoption of the cross bearing structure, the maximum axial line folding angle alpha can reach 45 degrees conveniently in design, and the axial line folding angles required by all working conditions can be met.

(4) The service life is long. Due to the adoption of the bearing structure, the abrasion loss is small, and the damage to parts is less. Can improve the operation rate of the equipment, reduce spare parts and be beneficial to improving the economic benefit.

(5) The transmission efficiency is high. Because of adopting the cross bearing structure, the energy loss is small, and the torque transmission capability is favorably improved.

(6) Is environment-friendly. Due to the adoption of the cross bearing structure, lubricating grease is stored in the cross bearing structure, oil is not required to be sprayed from top to bottom (an oil receiving disc is arranged below the cross bearing structure), oil is injected once, the cross bearing is used for a long time, and the cross bearing is environment-friendly and convenient.

Drawings

FIG. 1 is a profile view of an Oldham universal coupling at a non-axial break angle α.

Fig. 2 is a sectional view a-a in fig. 1.

FIG. 3 is an outline view of an Oldham coupling having an axis break angle α.

Fig. 4 is an outline view of a cross-bearing universal coupling without an axial break angle alpha.

Fig. 5 is an outline view of the crossed bearing universal coupling with an axial break angle alpha.

Fig. 6 is a sectional view B-B in fig. 4.

FIG. 7 is an exploded view of a cross-bearing universal coupling.

Fig. 8 is a cross-sectional view of the cross bearing.

FIG. 9 is a front view of a cross bearing block.

FIG. 10 is one of the cross bearing block cross sectional views.

FIG. 11 is a second cross-sectional view of the cross-bearing block.

Fig. 12 is a front view of the bearing outer cover.

Fig. 13 is a cross-sectional view of the bearing outer cover.

FIG. 14 is a top view of a cross-bearing universal coupling yoke.

FIG. 15 is a front view of a cross-bearing universal joint yoke.

Fig. 16 is a front view of a polygonal pin.

Fig. 17 is a cross-sectional view of a polygonal pin.

In the figure: 1. the universal coupling comprises a cross slide block universal coupling fork head 2, a cross slide block 3, a pin assembly 4 and a pin; 5. the universal coupling comprises a cross bearing universal coupling fork head 6, a bearing outer cover 7, a cross bearing block 8, a polygonal pin shaft 9, a rolling body 10, a sealing ring 11 and a plug screw; 61. a third raceway, 62, a fourth raceway, 63 and a sealing groove; 71. the raceway I, the raceway 72, the raceway II, the raceway 73, the oil filling hole 74 and the oil storage chamber; 81. an oil filling through hole; 82. an internal thread.

Detailed Description

The present invention will be described with reference to the following embodiments and accompanying drawings.

Referring to fig. 4-17, a cross bearing universal coupling is composed of a cross bearing universal coupling jaw 5, a polygonal pin shaft 8 and a cross bearing, wherein the cross bearing is used as a component to be connected and assembled with the cross bearing universal coupling jaws 5 at two ends through the polygonal pin shaft 8; an oiling through hole 81 is processed in the center of the polygonal pin shaft 8; the cross bearing is composed of a cross bearing block 7, a rolling body 9 and a bearing outer cover 6, four surfaces of the cross bearing block 7 are respectively provided with a roller path, an oil filling hole 73 is processed in the cross bearing block 7, and the oil filling hole 73 is communicated with an oil filling through hole 81; a polygonal shaft hole matched with the polygonal pin shaft 8 is processed at the central part of the bearing outer cover 6, a roller path is also processed on the inner surface of the bearing outer cover 6, and the roller path processed on the cross bearing block 7 has the same diameter as the roller path processed on the bearing outer cover 6; a plurality of rolling bodies 9 are arranged in a roller path processed on the cross bearing block 7, and four surfaces of the bearing cross block 7 are respectively embedded into the bearing outer cover 6.

Referring to fig. 6-13, there are two raceways processed on the cross bearing block 7, which are a raceway one 71 and a raceway two 72, respectively, there are two raceways processed on the bearing outer cover 6, which are a raceway three 61 and a raceway four 62, respectively, the diameters of the raceway one 71 and the raceway two 72 are the same as those of the raceway three 61 and the raceway four 62, a plurality of rolling bodies 9 are respectively placed in the raceway one 71 and the raceway two 72, and four surfaces of the bearing cross block 7 are respectively embedded in the bearing outer cover 6.

Referring to fig. 7 and 13, a sealing groove 63 is formed in the outer cylindrical surface of the bearing outer cover 6, and a sealing ring 10 is embedded in the sealing groove 63.

Referring to fig. 7 and 17, the oil filling through hole 81 is partially formed as a screw thread 82, and the screw plug 11 is screwed into the oil filling through hole 81.

Referring to fig. 11, the center of the cross bearing block 7 is formed into an oil reservoir 74.

Referring to fig. 4-17, the working principle of the universal joint coupling with the cross bearing is as follows: when the cross bearing universal coupling is in work and transmits torque, the cross bearing universal coupling fork head 5 at one end rotates, pressure is applied to the cross bearing by virtue of the plane in contact with the bearing outer cover 6, the cross bearing forces the cross bearing universal coupling fork head 5 at the other end to rotate by virtue of the plane in contact with the cross bearing universal coupling fork head 5 at the other end, and thus the torque and the motion are transmitted from one end of the cross bearing universal coupling to the other end. When the cross-bearing universal coupling works and the two cross-bearing universal coupling forks 5 have the axial break angle alpha, the cross-bearing universal coupling forks 5 rotate through the rolling bodies 9 and bear torque. Wherein, the bearing outer cover 6 and the cross bearing universal coupling fork head 5 are forced to synchronously rotate by the polygonal pin shaft 8. The axial angle alpha of the cross bearing universal coupling can reach 45 degrees at most. When the universal coupling of the cross bearing is lubricated, the screw plug 11 can be detached to inject oil through the oil injection through hole 81 of the polygonal pin shaft 8. The center of the cross-shaped block bearing 7 is processed into an oil storage chamber 74, so that the oil storage amount is larger.

Claims (5)

1. A cross bearing universal coupling is characterized in that: the universal coupling consists of a cross bearing universal coupling fork head, a polygonal pin shaft and a cross bearing, wherein the cross bearing is used as a part to be connected and assembled with the cross bearing universal coupling fork heads at two ends through the polygonal pin shaft; an oiling through hole is processed at the center of the polygonal pin shaft; the cross bearing is composed of a cross bearing block, a rolling body and a bearing outer cover, four surfaces of the cross bearing block are respectively provided with a roller path, an oil filling hole is processed in the cross bearing block, and the oil filling hole is communicated with the oil filling through hole; a polygonal shaft hole matched with the polygonal pin shaft is processed at the central part of the bearing outer cover, a roller path is also processed on the inner surface of the bearing outer cover, and the diameter of the roller path processed on the cross bearing block is the same as that of the roller path processed on the bearing outer cover; a plurality of rolling bodies are arranged in a roller path processed on the cross bearing block, and four surfaces of the cross bearing block are respectively embedded into the outer cover of the bearing.

2. A cross bearing universal joint according to claim 1, wherein: the bearing cross block is characterized in that two raceways are processed on the cross bearing block, namely a raceway I and a raceway II, two raceways are processed on the bearing outer cover, namely a raceway III and a raceway IV, the diameters of the raceway I and the raceway II are the same as those of the raceway III and the raceway IV, a plurality of rolling bodies are respectively placed in the raceway I and the raceway II, and four surfaces of the bearing cross block are respectively embedded into the bearing outer cover.

3. A cross bearing universal joint according to claim 1, wherein: the outer cylindrical surface of the bearing outer cover is provided with a sealing groove, and a sealing ring is embedded in the sealing groove.

4. A cross bearing universal joint according to claim 1, wherein: the oil filling through hole is partially processed into threads, and the screw plug is screwed into the oil filling through hole.

5. A cross bearing universal joint according to claim 1, wherein: the central part of the cross bearing block is processed into an oil storage chamber.

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