CN209959703U

CN209959703U - Special oscillating bearing

Info

Publication number: CN209959703U
Application number: CN201920665641.7U
Authority: CN
Inventors: 戴学利; 牛建平; 王建平
Original assignee: Zhejiang Bahuan Bearing Co Ltd
Current assignee: Bahuan Technology Group Co., Ltd
Priority date: 2019-05-10
Filing date: 2019-05-10
Publication date: 2020-01-17
Anticipated expiration: 2029-05-10

Abstract

The utility model discloses a special joint bearing, which comprises a closed ball bowl, a through ball bowl and a ball head screw rod; a hemispherical inner ball groove is arranged on one end surface of the ball-closing bowl along the central axis; a hemispherical inner ball hole with the same radius as the inner ball groove is arranged on the ball passing bowl through the upper end surface and the lower end surface of the ball passing bowl along the central axis, the inner ball groove and the inner ball hole jointly form a large hemispherical combined ball groove, and the diameter of an upper opening of the inner ball hole is larger than that of a lower opening; the ball head screw comprises a ball head and a screw rod, the diameter of the screw rod is smaller than the diameter of the lower opening of the inner ball hole, and the ball head rotates in the combined ball groove after the closed ball bowl is fixedly connected with the through ball bowl. The joint bearing is not only suitable for low-speed rotation and swing, but also suitable for high-speed rotation and swing; the closed ball bowl and the through ball bowl are detachably connected, so that the closed ball bowl, the through ball bowl and the ball head can be prevented from being damaged during assembly of the joint bearing, various materials can be conveniently and uniformly coated, and the lubricating performance and the wear resistance of the joint bearing are improved.

Description

Special oscillating bearing

Technical Field

The utility model relates to a special type joint bearing belongs to bearing technical field.

Background

The joint bearing is widely applied to engineering hydraulic oil cylinders, forging and pressing machine tools, engineering machinery, automation equipment, automobile shock absorbers, hydraulic machinery and other equipment. The spherical plain bearing can bear radial load, axial load or combined load acted by radial and axial directions simultaneously according to different structures and types.

The structure of the joint bearing is simpler than that of a rolling bearing, and the joint bearing mainly comprises an inner ring (ball head) with an outer spherical surface and an outer ring (ball bowl) with an inner spherical surface. The joint bearing is generally used for swinging motion (namely angular motion) with low speed, and can also perform tilting motion (namely aligning motion) within a certain angle range because the sliding surface is spherical, and can still normally work when the concentricity of the supporting shaft and the shaft shell hole is large.

The general assembly process of the joint bearing is that after the outer surface (ball head) of the inner ring is processed, the outer ring is placed into an inner hole of the outer ring (at the moment, the inner hole and the outer circle of the outer ring are both cylindrical surfaces), and then the outer circle of the outer ring is extruded to enable the inner hole of the outer ring to envelop the outer surface (ball head) of the inner ring, so that the inner surface of the outer ring forms an arc surface. Although the process is simple, the inner arc surface of the outer ring is not an ideal circle, the low-speed rotation swing can be realized, and the high-speed rotation swing cannot be adapted; in addition, during assembly, the ball head needs to be squeezed into the inner surface of the outer ring (ball bowl), so that the inner surface of the outer ring (ball bowl) and the spherical surface of the inner ring (ball head) can be damaged.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome the not enough of above technique, provide a special type joint bearing, this special type joint bearing should be used for military project to equip, and its rotatory slew velocity is very high, and is very high to the shape and the required precision on bulb surface, and the joint bearing of general assembly process processing can not satisfy the needs.

The utility model overcomes the technical scheme that its technical problem adopted is:

a special joint bearing comprises a closed ball bowl, a through ball bowl and a ball head screw rod; a hemispherical inner ball groove is formed in one end face of the ball closing bowl along the central axis; the ball passing bowl penetrates through the upper end face and the lower end face of the ball passing bowl and is provided with a hemispherical inner ball hole with the same radius as that of the inner ball groove along the central axis, the inner ball groove and the inner ball hole jointly form a large hemispherical combined ball groove, and the diameter of an upper opening of the inner ball hole is larger than that of a lower opening; the ball head screw comprises a ball head and a screw rod, the diameter of the screw rod is smaller than the diameter of the lower opening of the inner ball hole, and the ball head rotates in the combined ball groove after the closed ball bowl is fixedly connected with the through ball bowl.

Furthermore, the ball closing bowl and the ball passing bowl are detachably and fixedly connected through a fastener.

Furthermore, the fastening piece is an inner hexagon bolt, n first screw holes are uniformly distributed and encircled on the closed ball bowl around the inner ball groove, n is larger than or equal to 2, and n second screw holes corresponding to the first screw holes are uniformly distributed and encircled on the through ball bowl around the inner ball hole.

Furthermore, n counter bores which are coaxial with the screw hole II respectively are further arranged on the ball closing bowl, and the diameter of each counter bore is larger than that of the screw hole II.

Further, preferably n = 4.

Further, the thickness of the ball passing bowl is 50-60% of the radius of the ball head.

Furthermore, the edge of the inner ball groove is provided with a first chamfer, the edge of the upper opening of the inner ball hole is provided with a second chamfer, and after the closed ball bowl is attached to the through ball bowl, the first chamfer and the second chamfer jointly form an oil storage tank for storing oil, so that lubrication in the working process of the special oscillating bearing is ensured.

Furthermore, a wrench position, a key groove and threads are arranged on the screw rod.

Further, the wrench position is arranged on the screw rod at a position close to the ball head, the key groove is arranged on the surface of the screw rod along the axial direction of the screw rod, and the thread is arranged below the wrench position.

Furthermore, the ball closing bowl and the ball passing bowl are cylindrical in shape.

The utility model has the advantages that:

1. the utility model discloses a joint bearing not only is applicable to the rotatory swing of low-speed, still is applicable to the rotatory swing of high-speed.

2. The closed ball bowl and the through ball bowl are detachably connected, so that the closed ball bowl, the through ball bowl and the ball head can be prevented from being damaged during assembly of the joint bearing, various materials can be conveniently and uniformly coated, and the lubricating performance and the wear resistance of the joint bearing are improved.

3. An oil storage tank is arranged on the joint end surface of the ball closing bowl and the ball passing bowl, lubricating grease is stored, and lubrication in the working process of the special oscillating bearing is guaranteed.

4. The ball head of the closed ball bowl, the through ball bowl and the ball head screw rod can be subjected to finish machining and finishing machining, and the gap between the ball head and the two ball bowls can be accurately prepared.

Drawings

Fig. 1 is a schematic view of a partial cross-sectional structure of a special oscillating bearing according to an embodiment of the present invention.

Fig. 2 is a schematic side sectional view of the ball closing bowl and the ball passing bowl connected according to the embodiment of the present invention.

Fig. 3 is a schematic side sectional view of a ball closing bowl according to an embodiment of the present invention.

Fig. 4 is a schematic side sectional view of the bowl according to the embodiment of the present invention.

Fig. 5 is a schematic top view of the ball passing bowl according to the embodiment of the present invention.

Fig. 6 is a schematic structural view of the ball head screw of the embodiment of the present invention.

In the figure, 1, a ball closing bowl, 11, an inner ball groove, 111, a chamfer I, 12, a screw hole I, 2, a ball passing bowl, 21, an inner ball hole, 211, a chamfer II, 22, a screw hole II, 23, a counter bore, 3, a ball head screw rod, 31, a ball head, 32, a screw rod, 321, a wrench position, 322, a key groove, 323, a thread, 4, a combined ball groove, 5, a fastener, 6, an oil storage groove, d1, an upper opening diameter, d2 and a lower opening diameter.

Detailed Description

In order to facilitate better understanding of the present invention for those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments, which are given by way of illustration only and thus do not limit the scope of the present invention.

As shown in fig. 1 and 2, the special spherical plain bearing of this embodiment includes closed ball 1, logical ball 2 and bulb screw 3, through the removable fixed connection of fastener 5 between closed ball 1 and the logical ball 2, closed ball 1 and logical ball 2 are detachable connection, not only can avoid the spherical plain bearing assembly in the damage closed ball 1, logical ball 2 and bulb screw 3, can also coat various materials very conveniently, improve this spherical plain bearing's lubricating property and wear resistance.

In this embodiment, as shown in fig. 3, the closed ball bowl 1 is cylindrical, a hemispherical inner ball groove 11 is formed in one end surface of the closed ball bowl 1 along a central axis, n screw holes one 12 are uniformly distributed around the inner ball groove 11, where n is greater than or equal to 2.

In this embodiment, as shown in fig. 4 and 5, the ball passing bowl 2 is also cylindrical, a hemispherical inner ball hole 21 having the same radius as that of the inner ball groove 11 is formed in the ball passing bowl 2 through the upper and lower end faces thereof and is arranged along the central axis, n screw holes two 22 corresponding to the screw holes one 12 are uniformly distributed around the inner ball hole 21, the inner ball groove 11 and the inner ball hole 21 jointly form a large hemispherical combined ball groove 4, and the upper opening diameter d1 of the inner ball hole 21 is greater than the lower opening diameter d 2.

In this embodiment, as shown in fig. 6, the ball-head screw 3 includes an integrally formed ball head 31 and a screw 32, the diameter of the screw 32 is smaller than the diameter d2 of the lower opening of the inner ball hole 21, and the ball closing bowl 1 and the ball passing bowl 2 are connected in a detachable fixed connection manner, so that the ball head 31 rotates in the combined ball groove 4; the thickness of the through ball bowl 2 is 50-60% of the radius of the ball head 31, and more preferably 55%, so that the ball head 31 is not completely placed in the combined ball groove 4, and the center of the ball head 31 and the joint end face of the closing ball bowl 1 and the through ball bowl 2 are on the same straight line.

In this embodiment, the fastener 5 is a hexagon socket head cap screw, which is a standard component, and in this embodiment, 4 hexagon socket head cap screws are used, and the diameters thereof are selected according to the tensile force of the joint bearing during operation.

Further, as shown in fig. 4, 4 counter bores 23 which are coaxial with the second screw hole 22 respectively are further provided on the ball closing bowl 1, and the diameter of the counter bore 23 is larger than that of the second screw hole 22, specifically, the diameters and lengths of the first screw hole 12, the second screw hole 22 and the counter bore 23 are determined according to the selected hexagon socket head cap screw.

Further, as shown in fig. 3, 4 and 5, a first chamfer 111 is arranged at the edge of the inner ball groove 11, a second chamfer 211 is arranged at the edge of the upper opening of the inner ball hole 21, and the first chamfer 111 and the second chamfer 211 form an oil storage tank 6 for storing oil together after the ball closing bowl 1 and the ball passing bowl 2 are fixedly connected and attached through a fastener 5.

Further, as shown in fig. 6, a wrench position 321, a key slot 322 and a thread 323 are provided on the screw rod 32. Furthermore, the wrench position 321 is disposed on the screw rod near the ball head 31, and serves as a position for applying force to the wrench when the screw rod 32 is tightened; the key groove 322 is arranged on the surface of the screw rod along the axial direction of the screw rod and is used for positioning the rod piece which performs linear motion in the circumferential direction; the screw 323 is disposed below the wrench position 321, and is used to connect to a rod member that performs a linear motion.

In this embodiment, the closed bowl 1, the through bowl 2, and the ball head 31 of the ball head screw need to be finished.

The assembling process of the special oscillating bearing described in this embodiment is as follows: firstly, the ball passing bowl 2 is sleeved on the ball head screw rod 3, then the ball passing bowl 2 is attached to the ball closing bowl 1, the screw holes two 22 in the ball passing bowl 2 correspond to the screw holes one 12 in the ball closing bowl 1 one by one, and finally the hexagon socket head cap screw is screwed in.

The foregoing has described only the basic principles and preferred embodiments of the present invention and numerous changes and modifications may be made by those skilled in the art in light of the above teachings and shall fall within the scope of the present invention.

Claims

1. A special type joint bearing is characterized by comprising a closed ball bowl (1), a through ball bowl (2) and a ball head screw rod (3);

a hemispherical inner ball groove (11) is formed in one end face of the ball closing bowl (1) along the central axis;

the ball passing bowl (2) penetrates through the upper end face and the lower end face of the ball passing bowl and is provided with a hemispherical inner ball hole (21) with the same radius as that of the inner ball groove (11) along the central axis, the inner ball groove (11) and the inner ball hole (21) jointly form a large hemispherical combined ball groove (4), and the diameter (d 1) of an upper opening of the inner ball hole (21) is larger than the diameter (d 2) of a lower opening;

the ball head screw (3) comprises a ball head (31) and a screw (32), the diameter of the screw (32) is smaller than the diameter (d 2) of a lower opening of the inner ball hole (21), and the ball head (31) rotates in the combined ball groove (4) after the closed ball bowl (1) is fixedly connected with the through ball bowl (2).

2. A special oscillating bearing according to claim 1, characterised in that the closed bowl (1) is detachably and fixedly connected with the through bowl (2) by means of a fastening element (5).

3. A special oscillating bearing according to claim 2, characterized in that the fastening member (5) is a hexagon socket head cap screw, n screw holes I (12) are uniformly distributed and encircled around the inner ball groove (11) on the closed ball bowl (1), wherein n is more than or equal to 2, and n screw holes II (22) corresponding to the screw holes I (12) are uniformly distributed and encircled around the inner ball hole (21) on the through ball bowl (2).

4. A special spherical plain bearing according to claim 3, wherein the closed spherical bowl (1) is further provided with n counter bores (23) which are respectively coaxial with the second screw hole (22), and the diameter of each counter bore (23) is larger than that of the second screw hole (22).

5. The special spherical plain bearing according to claim 4, characterized in that n = 4.

6. A special spherical plain bearing according to any of claims 1 to 5, wherein the thickness of the ball passing bowl (2) is 50-60% of the radius of the ball head (31).

7. A special oscillating bearing according to claim 6, characterized in that a first chamfer (111) is arranged at the edge of the inner ball groove (11), a second chamfer (211) is arranged at the edge of the upper opening of the inner ball hole (21), and the first chamfer (111) and the second chamfer (211) form an oil storage groove (6) for storing grease after the ball closing bowl (1) is attached to the ball passing bowl (2).

8. A special spherical plain bearing according to any of claims 1-5 or 7, wherein the screw (32) is provided with a wrench location (321), a keyway (322) and a thread (323).

9. A special spherical plain bearing according to claim 8, wherein the wrench position (321) is arranged on the screw near the ball head (31), the key groove (322) is arranged on the surface of the screw along the axial direction of the screw, and the thread (323) is arranged below the wrench position (321).

10. A special spherical plain bearing according to claim 1, characterized in that the closed spherical bowl (1) and the through spherical bowl (2) are both cylindrical in shape.