CN211398361U

CN211398361U - One-way bearing

Info

Publication number: CN211398361U
Application number: CN201921964532.1U
Authority: CN
Inventors: 曹辉
Original assignee: Stdier Transmission Technology Xiamen Co ltd
Current assignee: Stdier Transmission Technology Xiamen Co ltd
Priority date: 2019-11-14
Filing date: 2019-11-14
Publication date: 2020-09-01
Anticipated expiration: 2029-11-14

Abstract

The utility model discloses a one-way bearing, the outer surface of the inner ring of the one-way clutch is provided with a plurality of U-shaped grooves, a roller is arranged between the U-shaped grooves and the outer ring, one end of the higher side wall of the U-shaped grooves is provided with an elastic body, the other end of the elastic body is connected with the roller, and the self-locking angles of all the rollers are kept the same under any condition; after the scheme is adopted, the rollers are always in fixed angle contact with the outer ring, and the rollers are also always in fixed angle contact with the plane of the bottom of the U-shaped groove, so that the self-locking angles of all the rollers are the same, the rollers cannot be changed even under the condition of high-frequency vibration, and the locking of the one-way bearing is ensured to prevent the locking.

Description

One-way bearing

Technical Field

The utility model relates to a bearing field refers in particular to can realize one-way pivoted one-way bearing.

Background

A one-way bearing is one that is free to rotate in one direction and locks in the other direction. The metal shell of the one-way bearing comprises a plurality of rolling shafts, rolling needles or rolling balls, and the rotating seat (cavity) of the one-way bearing is shaped to enable the one-way bearing to rotate only in one direction, and a great resistance force can be generated in the other direction to realize the one-way bearing. This characteristic of the one-way bearing makes it widely used in machinery and vehicles.

As shown in the figure 1-2, the existing wedge type one-way bearing comprises an outer ring 1 ', an inner ring 2 ', a retainer 3 ', a wedge 4 ' and a spring 5 ', wherein a bearing body and a one-way clutch are arranged side by side integrally, and the bearing body and the one-way clutch share the outer ring 1 ' and the inner ring 2 '. Because the wedge 4 'is of a special-shaped structure, two arcs are arranged between the arc lower end surface of the wedge and the arc outer surface of the inner ring 2' to be in back contact, the contact surface is smaller, and therefore the friction surface is smaller. In addition, the self-locking angle of each wedge 4 'is different when the wedges 4' are worn, so that the one-way bearing is blocked when high-frequency vibration or excessive load is applied (as shown in fig. 3 and 4). The media reports the case that the rider dies due to the fact that the bicycle is planted in front of the bicycle after the wedge type one-way bearing is clamped.

Chinese patent CN 202468707U discloses a one-way bearing, comprising: the bearing body, the bearing body includes outer lane, inner circle, the ring is equipped with a plurality of slots between outer lane and the inner circle, the slot opening is located on the inner circle, the ditch inslot is equipped with roller, elastic component, the roller is located the arc position of ditch inslot one side, the elastic component is located between slot opposite side inner wall and the roller, the elastic component is followed the rotatory opposite direction setting of bearing body. According to the structure, the grooves are designed in an arc shape, so that when the unidirectional bearing is subjected to high-frequency vibration, the self-locking angle of each ball is different, and the phenomenon of illegal locking can be caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a vibration resistance, dead one-way bearing of anti-sticking.

In order to achieve the purpose, the utility model relates to a one-way bearing, including bearing body and one-way clutch that integrative setting, bearing body and one-way clutch set up side by side and share outer lane and inner circle, wherein, the outer lane internal surface cross-section of one-way clutch is ring shape, the inner circle surface of one-way clutch is equipped with a plurality of "U" grooves, a roller sets up between this "U" groove and outer lane, this "U" groove bottom surface is the plane, "U" groove depth is followed one-way bearing forward direction of rotation and is from deep to shallow, be equipped with the elastomer in the higher lateral wall one end of "U" groove, this elastomer other end connects the roller; the normal line of the intersection surface of the roller and the outer ring and the normal line of the intersection surface of the roller and the bottom surface of the U-shaped groove of the inner ring form a self-locking angle, and the self-locking angles of all the rollers are kept the same under any condition.

The elastic body is a spring fixedly arranged in a spring accommodating cavity on the side wall with the higher U-shaped groove, and the other end of the spring is connected with the roller.

The lower side wall of the U-shaped groove is a blocking wall, and when the roller is abutted against the blocking wall, the spring still keeps a compressed state.

After the scheme is adopted, the rollers are always in fixed angle contact with the outer ring, and the rollers are also always in fixed angle contact with the plane of the bottom of the U-shaped groove, so that the self-locking angles of all the rollers are the same, the rollers cannot be changed even under the condition of high-frequency vibration, and the locking of the one-way bearing is ensured to prevent the locking.

Drawings

FIG. 1 is a partial transverse cross-sectional view of a prior art sprag-type one-way bearing;

FIG. 2 is a partial longitudinal cross-sectional view of a prior art sprag-type one-way bearing;

FIG. 3 is a schematic diagram of a conventional wedge type one-way bearing in a locked state;

FIG. 4 is a schematic diagram of a wedge self-locking angle of a wedge of a conventional wedge type one-way bearing;

fig. 5 is a transverse cross-sectional view of the present invention;

fig. 6 is a longitudinal sectional view of the present invention;

fig. 7 is a schematic view of the self-locking angle of the present invention.

Description of reference numerals:

1', an outer ring; 2', an inner ring; 3', a retainer; 4', a wedge block; 5', a spring; 1. an outer ring; 2. an inner ring; 21. a U-shaped groove; 211. a spring housing chamber; 212. a retaining wall; 3. a roller; 4. a spring.

Detailed Description

In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.

Referring to fig. 5 and 6, the one-way bearing of the present invention includes a bearing body and a one-way clutch integrally disposed, the bearing body and the one-way clutch are disposed side by side and share an outer ring and an inner ring, in the figure 5, the one-way clutch is arranged on the left side, the bearing is arranged on the right side, the section of the inner surface of the outer ring 1 of the one-way clutch is in a ring shape, the outer surface of the inner ring 2 of the one-way clutch is provided with a plurality of U-shaped grooves 21, the roller 3 is arranged between the U-shaped grooves 21 and the outer ring 1, the bottom surface of the U-shaped groove 21 is a plane, the depth of the U-shaped groove 21 is from deep to shallow along the forward rotation direction (clockwise direction of the inner ring in the figure 5) of the one-way bearing, the included angle between the, a spring accommodating cavity 211 is obliquely and downwards arranged on the higher side wall of the left side of the U-shaped groove, one end of a spring 4 is fixedly connected to the bottom of the spring accommodating cavity 211, and the other end of the spring is connected with the roller 3. The lower side wall of the U-shaped groove 21 is a stop wall 212, and the spring 4 is still compressed when the roller 3 abuts against the stop wall 212.

As shown in FIG. 7, the normal line of the intersection surface of the roller 3 and the outer ring 2 and the normal line of the bottom surface of the roller 3 and the inner ring U-shaped groove 21 form a self-locking angle, and the included angle between the bottom surface of each U-shaped groove 21 and the cambered surface of the outer ring 1 is the same, so that the self-locking angles of all the rollers are kept the same under any condition.

When the one-way bearing of the utility model is used in the forward direction, the inner ring 2 rotates clockwise, and the roller 3 is positioned at the deeper side of the left side of the U-shaped groove 21, so that the rotation of the bearing is not influenced; when the inner ring 2 rotates reversely, the roller 3 is positioned on the shallower side of the right side of the U-shaped groove 21, at this time, the friction force is increased under the extrusion of the bottom surfaces of the outer ring 1 and the U-shaped groove 21 to lock the one-way bearing, because the roller 3 and the bottom surface of the U-shaped groove 21 are combined in a line-to-line and surface mode (combined for a wedge type line-to-line mode), the friction surface is larger, the torque of the wedge type one-way bearing with the same type is only 80N/M, and the utility model discloses can reach 300N/M. Since the rollers 3 can always keep a fixed angle with the ring and the bottom surface of the U-shaped groove 21, the self-locking angle of each roller is the same and does not change when the unidirectional bearing encounters external high-frequency vibration or large load. Therefore, the one-way bearing can be kept in a locking state, and the condition of one-way failure can be caused without being locked.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent shapes or structural changes made by the contents of the specification and the drawings or directly or indirectly applied to other related technical fields are included in the same way in the protection scope of the present invention.

Claims

1. The utility model provides a one-way bearing, includes integrative bearing body and the one-way clutch who sets up, bearing body and one-way clutch set up side by side and share outer lane and inner circle, its characterized in that: the section of the inner surface of the outer ring of the one-way clutch is circular, the outer surface of the inner ring of the one-way clutch is provided with a plurality of U-shaped grooves, a roller is arranged between the U-shaped grooves and the outer ring, the bottom surfaces of the U-shaped grooves are planes, the depths of the U-shaped grooves are from deep to shallow along the forward rotation direction of the one-way bearing, one end of the higher side wall of the U-shaped groove is provided with an elastic body, and the other end of the elastic body is connected with the roller; the normal line of the intersection surface of the roller and the outer ring and the normal line of the intersection surface of the roller and the bottom surface of the U-shaped groove of the inner ring form a self-locking angle, and the self-locking angles of all the rollers are kept the same under any condition.

2. A one-way bearing as claimed in claim 1, wherein: the elastic body is a spring fixedly arranged in a spring accommodating cavity on the side wall of the U-shaped groove with the higher height, and the other end of the spring is connected with the roller.

3. A one-way bearing as claimed in claim 1, wherein: the lower side wall of the U-shaped groove is a blocking wall, and when the roller is abutted against the blocking wall, the spring still keeps a compressed state.