Roller type bidirectional overrunning clutch

Abstract

This utility model relates to a roller-type bidirectional overrunning clutch, comprising an inner wheel and an outer wheel. The outer wheel has a flange with mounting holes for fixing to external components. Multiple rollers are evenly distributed along the circumference between the inner and outer wheels. The outer edge of the inner wheel has a wedge-shaped inclined surface that mates with the rollers. Self-locking is achieved by varying the gap between the inner and outer wheels. Each roller has a spring on one side and a shift fork on the other. A left-side bearing is also provided between the inner and outer wheels. A right-side bearing is provided between the shift fork and the outer wheel. Sealing caps are provided on the outer sides of the left and right bearings. The clutch is filled with grease, and the bearings and their sealing caps restrict grease outflow. This utility model has a large internal space, accommodating more rollers and springs, and transmitting a larger torque. The inner wheel has a simple shape and is easy to manufacture. Clutch sealing is achieved through the reasonable arrangement of the bearings on both sides. The internal grease filling eliminates the need for external oil passages, making the clutch an independent unit.

Description

Technical Field

[0001] This utility model relates to the field of clutch technology, and mainly to a roller-type bidirectional overrunning clutch. Background Technology

[0002] Overrunning clutches are widely used in mechanical transmission mechanisms, with roller-type structures being particularly prevalent. Their simple structure allows for bidirectional self-locking and torque transmission via springs and wedge angles. Currently common roller-type bidirectional clutches embed springs by machining blind holes in the outer or inner rings; this structure is complex to manufacture and difficult to produce. The outer spring occupies a large space, making it difficult to increase the rated torque within the same space. Furthermore, clutches generally use oil lubrication, often requiring additional oil passages at the mounting location. Therefore, they cannot function as independent components. Utility Model Content

[0003] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a roller-type bidirectional overrunning clutch.

[0004] The objective of this utility model can be achieved using the following technical solutions: A roller-type bidirectional overrunning clutch includes an inner wheel and an outer wheel, wherein the outer wheel has a flange with mounting holes for fixing to external components; a plurality of rollers are evenly distributed circumferentially between the inner wheel and the outer wheel; the outer edge of the inner wheel has a wedge-shaped inclined surface that mates with the rollers; self-locking is achieved by changing the gap between the inner and outer wheels; a spring is provided on one side of each roller, and a shift fork is provided on the other side; a left-side bearing for supporting the rotation of the inner wheel is also provided between the inner wheel and the outer wheel; a right-side bearing for supporting the rotation of the shift fork is provided between the shift fork and the outer wheel; sealing caps are provided on the outer sides of the left and right bearings; the clutch is filled with grease, and the grease outflow is restricted by the bearings and their sealing caps.

[0005] The axial positioning of the left bearing is a cross-fixing method; its inner ring is positioned on the inside by the inner wheel shoulder, and its outer ring is positioned on the outside by the outer wheel shoulder.

[0006] The axial positioning of the right bearing is a cross-fixation method; its inner ring is positioned on the inside by the fork shoulder, and its outer ring is positioned on the outside by bolts fixed by the end cover.

[0007] Each of the springs is located outside the inner wheel and supports two rollers.

[0008] The technology described in this invention features a large internal space, accommodating more rollers and springs, thus enabling the transmission of greater torque. The springs are positioned on the outer side of the inner wheel, simplifying its shape and making it easier to manufacture. A well-designed arrangement of the bearings on both sides ensures clutch sealing. The clutch is internally filled with grease for lubrication, eliminating the need for external oil passages and making the clutch an independent unit. Attached Figure Description

[0009] Figure 1 Axial sectional view of the roller-type bidirectional overrunning clutch of this utility model.

[0010] Figure 2 The cross-section of the roller-type bidirectional overrunning clutch of this utility model.

[0011] Figure 3 A partial enlarged view of the roller of this utility model.

[0012] In the diagram: 1. Inner wheel, 2. Left bearing, 3. Outer wheel, 4. End cap, 5. Right bearing, 6. Shift fork, 7. Roller, 8. Spring. Detailed Implementation

[0013] The present invention will be described in conjunction with the accompanying drawings and specific embodiments.

[0014] like Figure 1 and Figure 2 As shown, a roller-type bidirectional overrunning clutch is mainly composed of an inner wheel 1, a left-side bearing 2, an outer wheel 3, an end cover 4, a right-side bearing 5, a shift fork 6, rollers 7, a spring 8, and internal lubricating grease.

[0015] The outer wheel 3 has a flange 3.1 with mounting holes for fixing to external components. The left bearing 2 is installed between the inner wheel 1 and the outer wheel 3, supporting the rotation of the inner wheel 1. The right bearing 5 is installed between the shift fork 6 and the outer wheel 3, supporting the rotation of the shift fork 6. The roller 7 is located between the inner wheel 1 and the outer wheel 3, with a spring 8 on one side and the shift fork 6 on the other. Therefore, the outer wheel 3 is a stationary component during operation. The shift fork 6 drives the inner wheel 1 to rotate via the roller 7 and the spring 8.

[0016] The spring 8 is located outside the inner wheel 1 and supports two rollers 7.

[0017] The left bearing 2 and the right bearing 5 are each provided with a single-sided sealing cover on their outer sides. When installing the bearings, the sealing cover faces outwards from the clutch. The clutch is filled with grease, and the flow of grease is restricted by the bearings and their sealing covers.

[0018] The axial positioning of the left bearing 2 is a cross-fixing method. Its inner ring is positioned on the inside by the shoulder of the inner wheel 1, and the outer ring is positioned on the outside by the shoulder of the outer wheel 3.

[0019] The axial positioning of the right-side bearing 5 is a cross-fixing method. Its inner ring is positioned on the inside by the shoulder of the pull fork 6, and the outer ring is positioned on the outside by bolts fixed to the end cover 4.

[0020] like Figure 3 The inner wheel 1 is provided with a wedge-shaped inclined surface 1.1, which cooperates with the roller 7. Self-locking is achieved by changing the gap between the inner wheel 1 and the outer wheel 3.

[0021] The working principle of the clutch is the same as that of current technology, so it will not be described in detail here.

[0022] The technology described in this invention features a large internal space, accommodating more rollers and springs, thus enabling the transmission of greater torque. The springs are positioned on the outer side of the inner wheel, simplifying its shape and making it easier to manufacture. A well-designed arrangement of the bearings on both sides ensures clutch sealing. The clutch is internally filled with grease for lubrication, eliminating the need for external oil passages and making the clutch an independent unit.

[0023] The parts not detailed are existing technologies.

Claims

1. A roller-type bidirectional overrunning clutch, characterized in that... A roller-type bidirectional overrunning clutch has an inner wheel and an outer wheel, wherein the outer wheel has a flange with mounting holes for fixing to external components; a plurality of rollers are evenly distributed around the circumference between the inner wheel and the outer wheel; the outer edge of the inner wheel has a wedge-shaped inclined surface that mates with the rollers; self-locking is achieved by changing the gap between the inner and outer wheels; a spring is provided on one side of each roller, and a shift fork is provided on the other side; a left bearing for supporting the rotation of the inner wheel is also provided between the inner wheel and the outer wheel; a right bearing for supporting the rotation of the shift fork is provided between the shift fork and the outer wheel; sealing caps are provided on the outer sides of the left and right bearings; the clutch is filled with grease, and the grease outflow is restricted by the bearings and their sealing caps.

2. A roller-type bidirectional overrunning clutch as described in claim 1, characterized in that... The axial positioning of the left bearing is a cross-fixing method; its inner ring is positioned on the inside by the inner wheel shoulder, and its outer ring is positioned on the outside by the outer wheel shoulder.

3. A roller-type bidirectional overrunning clutch as described in claim 1, characterized in that... The axial positioning of the right bearing is a cross-fixation method; its inner ring is positioned on the inside by the fork shoulder, and its outer ring is positioned on the outside by bolts fixed by the end cover.

4. A roller-type bidirectional overrunning clutch as described in claim 1, characterized in that... Each of the springs is located outside the inner wheel and supports two rollers.

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