CN214788585U

CN214788585U - Double-sealing ring linear motion ball bearing

Info

Publication number: CN214788585U
Application number: CN202120300757.8U
Authority: CN
Inventors: 陈林宝
Original assignee: Ningbo Baoding Automation Machinery Technology Co ltd
Current assignee: Ningbo Baoding Automation Machinery Technology Co ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2021-11-19
Anticipated expiration: 2031-02-03

Abstract

The utility model discloses a double-sealing ring linear motion ball bearing, which comprises an outer sleeve, a guide shaft and a plurality of steel balls, wherein the outer sleeve is arranged outside the guide shaft, a plurality of annular grooves I are arranged on the inner diameter of the outer sleeve, a plurality of grooves II distributed in an annular array are arranged on the outer diameter of the guide shaft, the annular grooves I and the grooves II jointly form a peach-shaped channel, the steel balls are arranged inside the peach-shaped channel, the double-sealing ring linear motion ball bearing also comprises two limiting mechanisms for limiting the axial positions of the steel balls, has high bearing torque, bears radial load and excellent sealing effect, and solves the problems that when the ball spline type linear motion ball bearing works, the steel balls respectively bear torque load in one direction, the steel ball on one side is loaded, the steel ball on the other side is unloaded, the torque load of the bearing can be borne by only half of the steel balls, the bearing capacity of the steel balls is not fully utilized, the torque bearing capacity of the bearing is not high, and the sealing effect is poor.

Description

Double-sealing ring linear motion ball bearing

Technical Field

The utility model relates to a bearing technical field specifically is a double containment ring linear motion ball bearing.

Background

The linear motion ball bearing generally comprises an outer sleeve, a guide shaft and a steel ball, and can also be used as a ball retainer assembly, and the steel ball circularly rolls or linearly reciprocates along a certain track between the outer sleeve and the guide shaft, so that the linear motion of the outer sleeve and the guide shaft is realized; the linear motion ball bearing generally bears radial load, the ball spline type linear motion ball bearing can bear radial load and torque load, and the ball spline type linear motion ball bearing has the defects that steel balls on two sides of a convex key respectively bear the torque load in one direction, the steel ball on one side is loaded, the steel ball on the other side is unloaded, the torque load of the bearing can be borne by only half of the steel balls, the bearing capacity of the steel balls is not fully utilized, the torque bearing capacity of the bearing is not high, and the traditional linear motion ball bearing is poor in sealing effect, so that the service life is short, and the practicability is not high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a double containment ring linear motion ball bearing, possess the height and bear the turn round and bear radial load and good sealed effect, solved ball spline type linear motion ball bearing at the during operation, the steel ball bears the moment of torsion load of a direction respectively, one side steel ball is loaded, the opposite side steel ball is not loaded, the moment of torsion load of bearing can only be born by half the steel ball, the bearing capacity of steel ball does not have make full use of, the moment of torsion bearing capacity of bearing is not high and sealed poor problem of effect.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a double containment circle linear motion ball bearing, includes overcoat, guide shaft and a plurality of steel ball, the overcoat sets up the outside at the guide shaft, a plurality of annular channel I have been seted up on the internal diameter of overcoat, set up a plurality of channel two that is the ring array and distribute on the guide shaft external diameter, annular channel I with channel two is formed with peach-shaped passageway jointly, the steel ball sets up the inside of peach-shaped passageway is still used for the restriction including two the limiting mechanism of steel ball axial position still is including being used for the lubrication the lubricating mechanism of steel ball still includes two sealing mechanism.

Preferably, the limiting mechanism comprises two retaining rings, a first groove is formed in the surface of the guide shaft, and the two retaining rings are fixedly connected to the inner wall of the first groove respectively.

Preferably, the sealing mechanism comprises a sealing ring, the sealing ring is fixedly connected to the inner wall of a cavity formed by the first annular channel and the second annular channel, and the sealing ring is made of butadiene acrylonitrile rubber.

Preferably, lubricating mechanism is including leading the oil groove, it sets up to lead the oil groove lead the surface of axle, lead the oil groove one end with peach-shaped passageway intercommunication, lead the oil groove the other end with lead the inner wall intercommunication of axle.

Preferably, the aperture of the oil guide groove is gradually reduced from the inner wall of the guide shaft to the outer wall.

Preferably, the sealing ring further comprises two end covers, the two end covers are fixedly connected to the surfaces of the two sealing rings respectively, and the end covers are made of PA66 engineering plastics.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the first, the utility model discloses a set up the channel on the internal diameter of overcoat and on the external diameter of guide shaft, and the channel is peach-shaped channel structure, after the steel ball is packed into the peach-shaped passageway between overcoat and the guide shaft, when the bearing bears clockwise torque load, the steel ball forms the contact with the lower left corner and the upper right corner of peach-shaped passageway, when the bearing bears anticlockwise torque load, the steel ball forms the contact with the upper left corner and the lower right corner of peach-shaped passageway, a list of steel ball can bear the torque load of two directions, be equivalent to two lists of steel ball of ball spline type linear motion ball bearing, no matter what direction the linear motion ball bearing bears the torque load, all steel balls all participate in bearing the load, only the torque load direction is different, form four contact points with four raceways of peach-shaped passageway, two pass the power direction, every row of steel ball all can bear the torque load of two directions, and no matter which direction the linear motion ball bearing bears the torque load, all the steel balls bear the load, so that the torque load bearing capacity of the bearing is greatly improved.

Secondly, the utility model discloses a set up the retaining ring in the groove at guide shaft both ends one respectively, not only restricted the axial position of steel ball, and guaranteed that the bearing does not deviate from the peach-shaped passageway at the motion in-process steel ball.

Three, the utility model discloses an end cover uses PA66 engineering plastic material, improves the tensile strength and the shock resistance of part, has very high toughness and wearability, still has good self-lubricity, and the shrinkage deformation is little during injection moulding, and size precision can obtain fine control.

Fourthly, the utility model discloses a sealing washer uses butadiene acrylonitrile rubber, and butadiene acrylonitrile rubber has good tear-resistant and stand wear and tear performance, can improve the sealing performance of whole bearing.

Fifth, the utility model discloses a lead the setting of oil groove, and respectively lead the aperture of oil groove and reduce gradually toward the outer wall direction by the inner wall of guide shaft, adopt the above-mentioned structure setting, the bore of leading the oil groove that reduces gradually can form the effect of oil blanket in leading the oil groove, and the lubricating oil that gets into in the peach-shaped passageway can be preserved well, and lubricating oil is added in the peach-shaped passageway that also can be fine simultaneously to form the storage effect to a certain extent to lubricating oil.

Drawings

FIG. 1 is a front sectional view of the structure of the present invention;

FIG. 2 is a side sectional view of the structure of the present invention;

fig. 3 is an enlarged view of a structure in fig. 2 according to the present invention.

In the figure: 1. a jacket; 2. a guide shaft; 3. a first annular channel; 4. a steel ball; 5. a retainer ring; 6. a seal ring; 7. an end cap; 8. an oil guide groove; 31. and a second channel.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 3, the present invention provides a technical solution: a double-sealing-ring linear motion ball bearing comprises an outer sleeve 1, a guide shaft 2 and a plurality of steel balls 4, wherein the outer sleeve 1 is arranged outside the guide shaft 2, a plurality of annular grooves 3 are formed in the inner diameter of the outer sleeve 1, a plurality of grooves 31 distributed in an annular array are formed in the outer diameter of the guide shaft 2, the annular grooves 3 and the grooves 31 jointly form a peach-shaped channel, the steel balls 4 are arranged inside the peach-shaped channel, the double-sealing-ring linear motion ball bearing further comprises two limiting mechanisms used for limiting the axial positions of the steel balls 4, a lubricating mechanism used for lubricating the steel balls 4 and two sealing mechanisms, the grooves are formed in the inner diameter of the outer sleeve 1 and the outer diameter of the guide shaft 2, the grooves are of peach-shaped channel structures, after the steel balls 4 are arranged in the peach-shaped channel between the outer sleeve 1 and the guide shaft 2, when the bearing bears torque load in the clockwise direction, the steel balls 4 are in contact with the lower left corner and the upper right corner of the peach-shaped channel, when the bearing bears torque load in the anticlockwise direction, the steel balls 4 are in contact with the upper left corner and the lower right corner of the peach-shaped channel, one row of steel balls 4 can bear torque load in two directions, the two rows of steel balls are equivalent to two rows of steel balls of a ball spline type linear motion ball bearing, namely, no matter which direction the linear motion ball bearing bears the torque load, all the steel balls 4 participate in bearing the load, only the directions of the torque load are different, four contact points are formed with four rolling paths of the peach-shaped channel, two force transmission directions are formed, each row of steel balls can bear the torque load in two directions, and no matter which direction the linear motion ball bearing bears the torque load, all the steel balls bear the load, so that the torque load bearing capacity of the bearing is greatly improved.

Furthermore, the limiting mechanism comprises two check rings 5, a first groove is formed in the surface of the guide shaft 2, the two check rings 5 are fixedly connected to the inner walls of the first grooves respectively, the check rings 5 are arranged in the first grooves at the two ends of the guide shaft 2 respectively, so that the axial position of the steel ball 4 is limited, and the steel ball 4 does not fall out of a peach-shaped channel in the movement process of the bearing.

Further, the sealing mechanism comprises a sealing ring 6, the sealing ring 6 is fixedly connected to the inner wall of a cavity formed by the first annular groove 3 and the second annular groove 31, the sealing ring 6 is made of butadiene-acrylonitrile rubber, the butadiene-acrylonitrile rubber has good tear resistance and wear resistance through the sealing ring 6, and the sealing performance of the whole bearing can be improved.

Further, lubricated mechanism leads oil groove 8 to set up on the surface of leading axle 2 including leading oil groove 8, leads the one end and the peach-shaped passageway intercommunication of oil groove 8, leads the other end of oil groove 8 and leads the inner wall intercommunication of axle 2, through the setting of leading oil groove 8, can add lubricating oil to the surface of steel ball 4 through leading oil groove 8.

Further, the aperture of leading oil groove 8 is reduced gradually toward the outer wall direction by the inner wall of guide shaft 2, through the setting of leading oil groove 8, and each aperture of leading oil groove 8 is reduced gradually toward the outer wall direction by the inner wall of guide shaft 2, adopt the above-mentioned structure setting, the bore of leading oil groove 8 that reduces gradually, can be in the effect of leading the oil blanket in oil groove 8, the lubricating oil that gets into in the peach-shaped passageway can be preserved well, simultaneously also can be fine add lubricating oil in to the peach-shaped passageway, thereby form the storage effect to a certain extent of lubricating oil.

Further, the sealing ring structure further comprises two end covers 7, the two end covers 7 are respectively and fixedly connected to the surfaces of the two sealing rings 6, the end covers 7 are made of PA66 engineering plastics, PA66 engineering plastic materials are used for the end covers 7, the tensile strength and the impact strength of parts are improved, the sealing ring structure has high toughness and wear resistance, and also has good self-lubricating property, small shrinkage deformation during injection molding, and good control over size precision.

The working principle is as follows: when the double-seal-ring linear motion ball bearing is used, the inner diameter of the outer sleeve 1 and the outer diameter of the guide shaft 2 are provided with the channels, the channels are all of a peach-shaped channel structure, after the steel balls 4 are arranged in the peach-shaped channel between the outer sleeve 1 and the guide shaft 2, when the bearing bears the torque load in the clockwise direction, the steel balls 4 are in contact with the lower left corner and the upper right corner of the peach-shaped channel, when the bearing bears the torque load in the anticlockwise direction, the steel balls 4 are in contact with the upper left corner and the lower right corner of the peach-shaped channel, one row of steel balls 4 can bear the torque load in two directions, namely, the double-seal-ring linear motion ball bearing is equivalent to two rows of steel balls of a ball spline type linear motion ball bearing, namely, no matter which direction the torque load is borne by the linear motion, all the steel balls 4 are involved in bearing the load, only the directions of the torque loads are different, four contact points are formed with four roller paths of the peach-shaped channel, and two force transmission directions are achieved, each row of steel balls can bear torque loads in two directions, and all the steel balls bear the loads no matter which direction the linear motion ball bearing bears the torque loads, so that the torque load bearing capacity of the bearing is greatly improved.

The retainer rings 5 are respectively arranged in the grooves I at the two ends of the guide shaft 2, so that the axial position of the steel ball 4 is limited, and the steel ball 4 does not fall out of the peach-shaped channel in the movement process of the bearing.

The end cover 7 is made of PA66 engineering plastic materials, so that the tensile strength and the impact strength of the part are improved, the part has high toughness and wear resistance, and also has good self-lubricating property, small shrinkage deformation during injection molding, and good control on the dimensional precision.

The sealing ring 6 is made of butadiene-acrylonitrile rubber which has good tear resistance and wear resistance, and the sealing performance of the whole bearing can be improved.

Through the setting of leading oil groove 8, and each aperture of leading oil groove 8 is reduced gradually toward the outer wall direction by the inner wall of guide shaft 2, adopts the above-mentioned structure setting, and the bore of leading oil groove 8 that reduces gradually can form the effect of oil blanket in leading oil groove 8, and the lubricating oil that gets into in the peach-shaped passageway can be preserved well, and lubricating oil is added in the peach-shaped passageway that also can be fine simultaneously to form the storage effect to a certain extent to lubricating oil.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a double containment circle linear motion ball bearing, includes overcoat (1), guide shaft (2) and a plurality of steel ball (4), its characterized in that: the outer sleeve (1) is arranged outside the guide shaft (2), a plurality of annular first channels (3) are formed in the inner diameter of the outer sleeve (1), a plurality of second channels (31) distributed in an annular array are formed in the outer diameter of the guide shaft (2), the annular first channels (3) and the second channels (31) jointly form a peach-shaped channel, and the steel balls (4) are arranged inside the peach-shaped channel;

the device also comprises two limiting mechanisms for limiting the axial position of the steel ball (4);

the lubricating mechanism is used for lubricating the steel ball (4);

two sealing mechanisms are also included.

2. The dual seal ring linear motion ball bearing according to claim 1, wherein: the limiting mechanism comprises two check rings (5), a first groove is formed in the surface of the guide shaft (2), and the two check rings (5) are fixedly connected to the inner wall of the first groove respectively.

3. The dual seal ring linear motion ball bearing according to claim 2, wherein: the sealing mechanism comprises a sealing ring (6), the sealing ring (6) is fixedly connected to the inner wall of a cavity formed by the first annular channel (3) and the second annular channel (31), and the sealing ring (6) is made of nitrile butadiene rubber.

4. The dual seal ring linear motion ball bearing according to claim 1, wherein: lubricating mechanism is including leading oil groove (8), it sets up to lead oil groove (8) lead the surface of axle (2), lead the one end of oil groove (8) with peach-shaped passageway intercommunication, lead the other end of oil groove (8) with lead the inner wall intercommunication of axle (2).

5. The dual seal ring linear motion ball bearing according to claim 4, wherein: the aperture of the oil guide groove (8) is gradually reduced from the inner wall of the guide shaft (2) to the outer wall direction.

6. The dual seal ring linear motion ball bearing according to claim 3, wherein: the sealing ring sealing structure is characterized by further comprising two end covers (7), wherein the two end covers (7) are fixedly connected to the surfaces of the two sealing rings (6) respectively, and the end covers (7) are made of PA66 engineering plastics.