Friction plate type overrunning clutch

Abstract

The utility model relates to the technical field of overrunning clutches, in particular to a friction plate type overrunning clutch which comprises an inner ring, a bearing, an outer ring, a pressing plate, friction plates, dual plates, a pin, a torsion spring and a check ring. And the bearing is arranged between the inner ring and the outer ring to play a supporting role. In a driving state, the pressing plate tightly presses the friction plate and the dual plate to form self-locking transmission torque; and in the overrunning state, the pressing plate is separated from the dual disc, self-locking is relieved, and separation is completed. The device is simple and compact in structure, easy to manufacture, convenient to install, low in production cost, large in torque density, small in noise and abrasion in use, long in service life, more suitable for small-space occasions, and easier to replace and maintain and serialize products.

Description

Technical Field

[0001] The utility model relates to the technical field of clutches, in particular to a friction plate type overrunning clutch. Background Art

[0002] The overrunning clutch is one of the basic components in the mechanical transmission system. It is a clutch that automatically engages or disengages as the speed of the master and slave parts changes or the direction of rotation changes. It is widely used in packaging machinery, food machinery, light industrial machinery, agricultural machinery, metallurgy and mining, petrochemical industry, machine tools, automobiles, weapons, aviation and power stations.

[0003] The existing overrunning clutch is mainly divided into three types: ratchet type, roller type and wedge type. The ratchet type overrunning clutch has a simple structure, is easy to manufacture and has high reliability, but has a certain idling angle, and there will be impact and noise when engaging. It is usually suitable for applications with a small speed difference. The roller type and wedge type engage smoothly without impact and idling travel section, but the structure is complex and the manufacturing cost is high. Utility Model Content

[0004] The utility model aims to provide a small torque friction plate type overrunning clutch which has simple structure, low manufacturing cost and stable engagement.

[0005] To achieve the above-mentioned objectives, the utility model proposes the following technical solutions: a friction plate type overrunning clutch, comprising a pressure plate, wherein the pressure plate is arranged between the outer ring and the inner ring, at least one friction plate and a dual plate are arranged between the outer ring and the pressure plate, at least one cylindrical pin is arranged between the pressure plate and the inner ring, and a torsion spring is arranged between the pressure plate and the inner ring.

[0006] Furthermore, in the utility model, the outer circle of the friction plate is an external spline, the inner hole of the outer ring has an internal spline, and the external spline of the friction plate cooperates with the internal spline of the outer ring.

[0007] Furthermore, in the present invention, the inner circle of the dual piece is an internal spline, the outer circle of the inner ring has an external spline, and the internal spline of the dual piece cooperates with the external spline of the inner ring.

[0008] Furthermore, in the present invention, the left end surface of the dual piece is in close contact with the right end surface of the pressing plate.

[0009] Furthermore, in the present invention, the friction plates and the dual plates are arranged alternately, and the number of the dual plates is equal to the number of the friction plates.

[0010] Furthermore, in the utility model, the inner hole of the pressure plate is a cylindrical surface, the outer circle of the inner ring is a cylindrical surface, and the inner hole surface of the pressure plate matches the outer circle surface of the inner ring.

[0011] Furthermore, in the utility model, the inner ring has a pin hole that cooperates with the cylindrical pin.

[0012] Furthermore, in the utility model, the pressure plate has a spiral groove that cooperates with the cylindrical pin.

[0013] Furthermore, in the utility model, the legs at both ends of the torsion spring are respectively connected to the inner ring and the pressure plate.

[0014] The pressure plate is installed on the inner ring and rotates synchronously with the inner ring. One end of the cylindrical pin cooperates with the spiral groove on the pressure plate, and the other end cooperates with the pin hole of the inner ring. The pressure plate moves in a left and right spiral on the inner ring. One end of the torsion spring is fixed on the inner ring, and the other end is fixed on the pressure plate. The torsion spring is initially in a compressed state, causing the pressure plate to move in a right spiral, and the right end face of the pressure plate is tightly attached to the left end face of the dual plate. The support bearing is installed between the inner ring and the outer ring. When the overrunning clutch works in the driving state, the cylindrical pin presses against the right spiral surface of the spiral groove of the pressure plate, and the pressure plate moves in a right spiral to squeeze the dual plate. The pressure plate presses the friction plate and the dual plate between the pressure plate and the outer ring. The friction plate, the dual plate, the pressure plate, and the outer ring form a friction self-locking to transmit torque. When the overrunning clutch works in the overrunning state, the outer ring speed is higher than the inner ring speed, the cylindrical pin presses against the left spiral surface of the spiral groove of the pressure plate, and the pressure plate has a tendency to move in a left spiral. The pressure plate cannot squeeze the dual plate, the self-locking is released, and the outer ring and the inner ring are disconnected from the torque transmission.

[0015] Beneficial effects: The technical solution of this application has the following technical effects:

[0016] The device has a simple and compact structure, is easy to manufacture and install, has a low production cost, a high torque density, low noise during use, low wear and tear, and a long service life. It is more suitable for small space occasions, and is easier to replace and maintain as well as to serialize products.

[0017] It should be appreciated that all combinations of the foregoing concepts, as well as additional concepts described in greater detail below, may be considered part of the inventive subject matter of the present disclosure, provided such concepts are not mutually inconsistent.

[0018] The foregoing and other aspects, embodiments and features of the present invention can be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as the features and / or beneficial effects of the exemplary embodiments, will be apparent from the following description or learned through practice of the specific embodiments according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are not intended to be drawn to scale. In the accompanying drawings, each identical or nearly identical component shown in various figures may be represented by the same reference numeral. For the sake of clarity, not every component is labeled in each figure. Now, embodiments of various aspects of the utility model will be described by way of example and with reference to the accompanying drawings, in which:

[0020] Figure 1 This is an exploded view of the first embodiment of the utility model;

[0021] Figure 2 This is a structural diagram of the inner ring of the first embodiment of the utility model;

[0022] Figure 3 This is a structural diagram of the outer ring of Embodiment 1 of the present utility model;

[0023] Figure 4 This is a structural diagram of a torsion spring according to Embodiment 1 of the present utility model;

[0024] Figure 5 This is a structural diagram of a pressure plate according to Embodiment 1 of the present utility model;

[0025] Figure 6 This is a schematic diagram of the cooperation between the pressure plate and the cylindrical pin during operation of the first embodiment of the utility model;

[0026] Figure 7 This is a schematic diagram of the cooperation between the pressure plate and the cylindrical pin during overrunning in the first embodiment of the utility model;

[0027] Figure 8 This is an exploded view of the second embodiment of the present utility model;

[0028] Fig. 9 This is a structural diagram of the inner ring of the first embodiment of the utility model;

[0029] Fig.10 This is a structural diagram of the outer ring of Embodiment 1 of the present utility model;

[0030] Fig.11 This is a structural diagram of a torsion spring according to Embodiment 1 of the present utility model.

[0031] Fig.12 The utility model is a cross-sectional view. In the figure, the meanings of the reference numerals are as follows: 1, shaft retaining ring; 2, bearing; 3, torsion spring; 4, pressure plate; 5, inner ring; 6, dual plate; 7, friction plate; 8, outer ring; 9, cylindrical pin; 31, first leg; 32, second leg; 41, second hole; 42, spiral groove; 421, left spiral surface; 422, right spiral surface; 43, inner hole; 51, first hole; 52, cylindrical surface; 53, first pin hole; 54, external spline; 81, first internal spline; 82, friction surface; 83, second pin hole. DETAILED DESCRIPTION

[0032] In order to better understand the technical content of the utility model, specific embodiments are cited and described as follows in conjunction with the accompanying drawings. In this disclosure, various aspects of the utility model are described with reference to the accompanying drawings, and many illustrative embodiments are shown in the accompanying drawings. The embodiments of the present disclosure are not necessarily defined to include all aspects of the utility model. It should be understood that the various concepts and embodiments introduced above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed in the utility model are not limited to any implementation method. In addition, some aspects disclosed in the utility model can be used alone, or used in any appropriate combination with other aspects disclosed in the utility model.

[0033] See also Figure 1-Figure 7 , the utility model provides an embodiment 1:

[0034] Figure 1 It is an exploded diagram of a friction plate type overrunning clutch, which includes a shaft retaining ring 1, a bearing 2, a torsion spring 3, a pressure plate 4, an inner ring 5, a dual plate 6, a friction plate 7, an outer ring 8, and a cylindrical pin 9. Figure 2 The figure shows the structure of the inner ring 5, on the outer circle of which there is a hole 51 for fixing the torsion spring 3 and a pin hole 53 for fixing the cylindrical pin 9, the cylindrical surface 52 cooperates with the inner hole of the pressure plate 4, and the outer circle of the inner ring 5 has an external spline 54, which cooperates with the internal spline of the dual plate 6. Figure 3 : is the structural diagram of the outer ring 8 , the inner hole of which has an internal spline 81 , which cooperates with the external spline of the friction plate 7 , and the outer ring 8 has a friction surface 82 which fits with the end surface of the friction plate 7 . Figure 4 The figure shows the structure of the torsion spring 3. The second leg 32 at one end of the torsion spring cooperates with the hole 53 of the inner ring 5, and the first leg 31 at the other end cooperates with the pressure plate 4. The torsion spring is in a compressed state, pushing the pressure plate 4 to rotate to the right, so that the right end face of the pressure plate 4 is always in contact with the left end face of the dual piece 6. Figure 5 As shown in the figure is the structural diagram of the pressure plate 4, there is a second hole 41 on the left end surface of the pressure plate 4, which is used to fix the first leg 31 at one end of the torsion spring 3, the inner hole 43 of the pressure plate 4 cooperates with the cylindrical surface 52 of the inner ring 5, and there is a spiral groove 42 on the surface of the pressure plate 4, which cooperates with the cylindrical pin 9.

[0035] See also Figure 6 This embodiment is an application mode of the device. When the overrunning clutch works in the driving state, the inner ring 5 transmits the torque to the pressure plate 4 through the cylindrical pin 9. At the same time, the cylindrical pin 9 is close to the right spiral surface 422 of the spiral groove 42 of the pressure plate 4. The pressure plate 4 moves to the right spiral to squeeze the dual plate 6. The pressure plate 4 and the friction plate 7, the dual plate 6, and the outer ring 8 form a friction self-locking to transmit the torque.

[0036] See also Figure 7This embodiment is an application mode of the present device. When the overrunning clutch works in the overrunning state, the rotation speed of the outer ring 8 is higher than that of the inner ring 5. The cylindrical pin 9 is pressed against the left spiral surface 421 of the spiral groove 42 of the pressure plate 4. The pressure plate 4 has a tendency to move in a left spiral direction. The pressure plate 4 cannot squeeze the dual plate 6, the self-locking is released, and the torque transmission between the outer ring 8 and the inner ring 5 is disconnected.

[0037] See also Figure 8-Figure 11 , the utility model provides a second embodiment:

[0038] Figure 8 The invention is a friction plate type overrunning clutch, which comprises a shaft retaining ring 1, a bearing 2, a torsion spring 3, a pressure plate 4, an inner ring 5, a dual plate 6, a friction plate 7, an outer ring 8 and a cylindrical pin 9. Fig. 9 It is a structural diagram of the inner ring 5, and its outer circle has an external spline 51, which cooperates with the internal spline of the dual piece 6. The inner ring 5 has a friction surface 51 that is tightly attached to the dual piece 6. Fig.10 The figure shows the structure of the outer ring 8, on the outer circle of which there is a hole 81 for fixing the torsion spring 3 and a second pin hole 83 for fixing the cylindrical pin 9, the inner hole 82 cooperates with the outer circle of the pressure plate 4, and the inner hole of the outer ring 8 has an internal spline 84 that cooperates with the external spline of the friction plate 7. Fig.11 The figure shows the structure of the torsion spring 3. The second leg 32 at one end of the torsion spring cooperates with the hole 83 of the outer ring 8, and the first leg 31 at the other end cooperates with the pressure plate 4. The torsion spring is in a compressed state, pushing the pressure plate 4 to rotate to the right, so that the right end face of the pressure plate 4 is always in contact with the left end face of the friction plate 7.

[0039] See also Figure 6 This embodiment is an application mode of the present device. When the overrunning clutch works in the driving state, the cylindrical pin 9 is pressed against the right spiral surface 422 of the spiral groove 42 of the pressure plate 4, and the pressure plate 4 moves in a right spiral direction to squeeze the friction plate 7. The pressure plate 4 and the dual plate 6, the friction plate 7, and the inner ring 5 form a friction self-locking to transmit the torque. At the same time, the pressure plate transmits the torque to the outer ring through the cylindrical pin 9.

[0040] See also Figure 7 This embodiment is an application mode of the device. When the overrunning clutch works in the overrunning state, the rotation speed of the outer ring 8 is higher than that of the inner ring 5. The cylindrical pin 9 is pressed against the left spiral surface 421 of the spiral groove 42 of the pressure plate 4. The pressure plate 4 has a tendency to move in a left spiral direction. The pressure plate 4 cannot squeeze the friction plate 7, the self-locking is released, and the torque transmission between the outer ring 8 and the inner ring 5 is disconnected.

[0041] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.

Claims

1. A friction plate overrunning clutch, characterized in that: The invention comprises a pressure plate (4), wherein the pressure plate (4) is arranged between an outer ring (8) and an inner ring (5), at least one friction plate (7) and a pair of plates (6) are arranged between the outer ring (8) and the pressure plate (4), at least one cylindrical pin (9) is arranged between the pressure plate (4) and the inner ring (5), and a torsion spring (3) is arranged between the pressure plate (4) and the inner ring (5).

2. A friction plate overrunning clutch according to claim 1, characterized in that: The outer circle of the friction plate (7) is an external spline, and the inner hole of the outer ring (8) has an internal spline. The external spline of the friction plate (7) cooperates with the internal spline of the outer ring (8).

3. The friction plate overrunning clutch according to claim 1, characterized in that: The inner circle of the dual piece (6) is an internal spline, and the outer circle of the inner ring (5) has an external spline. The internal spline of the dual piece (6) cooperates with the external spline of the inner ring (5).

4. The friction plate overrunning clutch according to claim 1, characterized in that: The left end surface of the dual piece (6) is in close contact with the right end surface of the pressing plate (4).

5. The friction plate overrunning clutch according to claim 1, characterized in that: The friction plates (7) and the dual plates (6) are arranged alternately, and the number of the dual plates (6) is equal to the number of the friction plates (7).

6. The friction plate overrunning clutch according to claim 1, characterized in that: The inner hole of the pressure plate (4) is a cylindrical surface, the outer circle of the inner ring (5) is a cylindrical surface, and the inner hole surface of the pressure plate (4) matches the outer circle surface of the inner ring (5).

7. The friction plate overrunning clutch according to claim 1, characterized in that: The inner ring (5) has a pin hole which cooperates with the cylindrical pin (9).

8. The friction plate overrunning clutch according to claim 1, characterized in that: The pressing plate (4) has a spiral groove that cooperates with the cylindrical pin (9).

9. The friction plate overrunning clutch according to claim 1, characterized in that: The legs at both ends of the torsion spring (3) are respectively connected to the inner ring (5) and the pressure plate (4).

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