Torque-controllable one-way bearing

Abstract

The present application relates to the technical field of bearing, in particular to a one-way bearing with controllable torque. The one-way bearing comprises an outer fixed ring, a separation block, a supporting spring, a needle roller, a spring sheet and a mandrel. The mandrel is coaxially arranged in the outer fixed ring. The separation block has a plurality of blocks which are uniformly distributed between the outer fixed ring and the mandrel. One end of the separation block is rotatably abutted against the inner wall of the outer fixed ring, and the other end is pressed against the outer side of the mandrel through the supporting spring arranged on the inner wall of the outer fixed ring. The separation block is internally provided with a needle roller. The needle roller and the mandrel are coaxially arranged. The outer side of the needle roller is elastically contacted with the separation block through the spring sheet and is in contact with the outer side of the mandrel. The one-way bearing has simple structure and can realize one-way transmission of quantitative torque. When the torque exceeds the quantitative torque, the one-way bearing is changed from locking to rotation. The one-way bearing can be applied to quantitative torque output, torque output overload protection, torque output limitation, synchronous operation and differential operation switching.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bearings, in particular to a torque-controllable one-way bearing. BACKGROUND

[0002] One-way bearing is a kind of bearing that can rotate freely in one direction and lock in the other direction. One-way bearing is also called overrunning clutch, which is named differently according to different industries and functions. In the metal shell of one-way bearing, there are many rollers, needles or balls, and the shape of the rolling seat (hole) makes it only roll in one direction, and it will generate a lot of resistance in the other direction (so-called "one-way").

[0003] One-way bearing is a mechanical structure that can rotate freely in one direction and lock in the opposite direction. It can realize the functions of one-way transmission of torque, positioning, overrunning, etc. With the application of automation and intelligence, one-way bearings are increasingly widely used in automation and intelligent equipment. More functions are required for one-way bearings.

[0004] The existing one-way bearing can transmit a certain amount of torque in the reverse direction, but it may damage the mechanical device when the torque exceeds a certain value. SUMMARY

[0005] The purpose of the present application is to overcome the defects of the prior art and provide a torque-controllable one-way bearing.

[0006] The technical solution to achieve the purpose of the present application is: a torque-controllable one-way bearing, comprising an outer fixed ring, a separation block, a support spring, a needle, a spring sheet and a mandrel; the mandrel is coaxially arranged in the outer fixed ring; the separation block has a plurality of blocks, which are evenly distributed between the outer fixed ring and the mandrel; one end of the separation block is rotatably abutted against the inner wall of the outer fixed ring, and the other end is pressed against the outer side of the mandrel through the support spring arranged on the inner wall of the outer fixed ring; a needle is arranged inside the separation block; the needle and the mandrel are coaxially arranged, and the outer side is in elastic contact with the inside of the separation block and the outer side of the mandrel through the spring sheet.

[0007] Further, a plurality of arc-shaped grooves for mounting the separation block are evenly arranged on the inner side of the outer fixed ring, and a support spring mounting groove is arranged beside each arc-shaped groove.

[0008] Further, one end of the separation block is provided with a rotating column matched with the arc-shaped groove, and an accommodation space for mounting the needle and the spring sheet is arranged inside the separation block; the inner side of the separation block is arc-shaped.

[0009] Further, the accommodation space comprises a needle accommodation groove and a spring sheet accommodation groove which are in communication with each other; the needle accommodation groove is in communication with the outer side of the mandrel.

[0010] Further, the support spring and the support spring mounting groove are clearance fit in the circumferential direction of the outer fixing ring.

[0011] After the technical scheme is applied, the application has the following positive effects:

[0012] (1) The application has simple structure and can realize one-way transmission of quantitative torque. When the torque exceeds the quantitative torque, the one-way bearing changes from locking to rotation. It can be applied to torque quantitative output, torque output overload protection, torque output limitation, synchronous operation and differential operation switching. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to make the content of the application more easily understood, the application is further described in detail below according to specific embodiments and in combination with the drawings, in which

[0014] Figure 1 It is a structural schematic view of the application;

[0015] Figure 2 It is a front view of the application;

[0016] Figure 3 It is an explosion view of the application;

[0017] Figure 4 It is a front view of the outer fixing ring of the application;

[0018] Figure 5 It is a front view of the separation block of the application. DETAILED DESCRIPTION

[0019] See Figures 1 to 3 The application has an outer fixing ring 1, a separation block 2, a support spring 3, a needle roller 4, a spring sheet 5 and a mandrel 6. The mandrel 6 is coaxially arranged in the outer fixing ring 1. The separation block 2 has three blocks, which are uniformly distributed between the outer fixing ring 1 and the mandrel 6. One end of the separation block 2 is rotatably abutted against the inner wall of the outer fixing ring 1, and the other end is pressed against the outer side of the mandrel 6 through the support spring 3 arranged on the inner wall of the outer fixing ring 1. The separation block 2 is internally provided with a needle roller 4. The needle roller 4 and the mandrel 6 are coaxially arranged. The outer side is elastically contacted with the separation block 2 through the spring sheet 5 and is in contact with the outer side of the mandrel 6. The support spring 3 and the support spring mounting groove 12 are clearance fit in the circumferential direction of the outer fixing ring 1.

[0020] See Figure 4 The inner side of the outer fixing ring 1 is uniformly provided with a plurality of arc-shaped grooves 11 for mounting the separation block 2. Each arc-shaped groove 11 is provided with a support spring mounting groove 12.

[0021] See Figure 5, one end of the separation block 2 is provided with a rotating column 21 matched with the arc-shaped slot 11, an accommodating space 22 for mounting the needle roller 4 and the spring piece 5 is arranged inside, the inner side of the separation block 2 is circular arc-shaped and matched with the mandrel 6. The accommodating space 22 comprises the needle roller accommodating slot 221 and the spring piece accommodating slot 222 which are communicated with each other; the needle roller accommodating slot 221 is communicated with the outer side of the mandrel 6.

[0022] The working principle of the present application is as follows:

[0023] See Figure 2 When the outer fixed ring 1 is fixed and the mandrel 6 rotates clockwise, the needle roller 4 moves rightward against the pressure of the spring piece 5 under the action of friction, and the gap between the mandrel 6 and the needle roller 4 becomes larger. The mandrel 6 rotates flexibly rightward.

[0024] When the outer fixed ring 1 is fixed and the mandrel 6 rotates counterclockwise, the needle roller 4 is combined with the mandrel 6 tightly under the pressure of the spring piece 5. When the mandrel 6 rotates counterclockwise, the needle roller 4 moves leftward under the combined force of the friction with the mandrel 6 and the pressure of the spring piece 5, and contacts with the separation block 2 to generate pressure. The pressure acts on the supporting spring 3. When the mandrel 6 rotates counterclockwise, the torque is transmitted to the outer fixed ring 1, so as to drive the outer fixed ring 1 to rotate counterclockwise. When the torque transmitted by the mandrel 6 is greater than the pressure of the supporting spring 3, the supporting spring 3 is elastically deformed, and the separation block 2 drives the needle roller 4 and the spring piece 3 to rotate outward. The mandrel 6 keeps rotating with a certain torque, and the outer fixed ring 1 stops rotating, so as to realize torque output. When the counterclockwise rotation torque of the mandrel 6 reaches a set value, the outer fixed ring 1 stops rotating.

[0025] The above-described specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above-described specific embodiments are only for the specific embodiments of the present application and are not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A torque-controllable one-way bearing, characterized by: The utility model provides a fixed ring (1), separate block (2), support spring (3), needle roller (4), spring leaf (5), mandrel (6), the mandrel (6) coaxial setting in fixed ring (1), the separate block (2) has several blocks, even week cloth between fixed ring (1) and mandrel (6), the separate block (2) one end rotatably abuts in fixed ring (1) inner wall, the other end is pressed against mandrel (6) outside through the support spring (3) setting on fixed ring (1) inner wall, the separate block (2) inside is provided with a needle roller (4), the needle roller (4) and mandrel (6) coaxial direction setting, outside through spring leaf (5) and separate block (2) inside elastic contact, and and mandrel (6) outside contact.

2. The torque-controllable one-way bearing of claim 1, wherein: The fixed ring (1) inside evenly is equipped with a plurality of arc slot (11) for installing separate block (2), every arc slot (11) is equipped with a support spring mounting groove (12) around.

3. The torque-controllable one-way bearing of claim 2, wherein: The separate block (2) one end is provided with the rotating column (21) of cooperation arc slot (11), is provided with the containing space (22) of installation needle roller (4) and spring leaf (5) inside, the separate block (2) inside is arc.

4. The torque-controllable one-way bearing of claim 3, wherein: The containing space (22) includes needle roller containing groove (221) and spring leaf containing groove (222) of intercommunication, needle roller containing groove (221) and mandrel (6) outside intercommunication.

5. The torque-controllable one-way bearing of claim 2, wherein: The support spring (3) and support spring mounting groove (12) are clearance fit in the circumferential direction of fixed ring (1).

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