Roller clutch and helicopter

Abstract

The utility model provides a roller clutch and a helicopter. Comprising an inner ring, an outer ring, a retainer and an elastic piece. A first roller path, a second roller path and a limiting boss are arranged on the peripheral face of the inner ring, the outer ring is arranged on the inner ring in a sleeving mode, the retainer is arranged between the outer ring and the inner ring, a roller is installed in the retainer, the end, close to the limiting boss, of the retainer is connected with an extending part in the axial direction of the retainer, and when the extending part makes contact with the limiting boss, the roller is located in the first roller path, and when the extending part makes contact with the limiting boss, the roller is located in the second roller path. The inner ring and the outer ring keep rotating relatively; and the elastic piece pushes the extending part to rotate to be separated from the limiting boss, so that the roller is clamped between the second roller path and the outer ring, and the inner ring and the outer ring keep rotating integrally. According to the utility model, one end of the retainer extends to form the extension part, and the extension part is matched with the limiting boss and the elastic piece which are arranged on the outer peripheral surface of the inner ring, so that the retainer and the pin roller are positioned, the pin roller is favorably mounted and dismounted, the deflection of the retainer in a high-speed state is effectively reduced, and larger torque can be transmitted.

Description

Technical Field

[0001] The utility model relates to an overrunning clutch, in particular to a roller clutch and a helicopter. Background Art

[0002] In the related art, a roller clutch comprises an inner sleeve, an outer sleeve, a retaining frame, a needle roller, and a return spring. The roller is mounted on the retaining frame and positioned by the return spring. A ratchet tooth, positioned opposite the roller, is provided on the inner wall of the outer sleeve, creating a one-way overrunning clutch. In this related art, the return spring is located inside the retaining frame, making it inconvenient to install and unable to transmit high torque, making it difficult to meet the high torque requirements of aviation clutches. Therefore, there is a need for a roller clutch that overcomes these drawbacks. Utility Model Content

[0003] The purpose of the utility model is to provide a roller clutch and a helicopter.

[0004] According to one aspect of the present invention, a roller clutch is provided, comprising: an inner ring, the outer circumferential surface of the inner ring is provided with a raceway portion and a limiting boss, the raceway portion is composed of a first raceway and a second raceway that are adjacent and alternately arranged, and the limiting boss is located on one side of the raceway portion; an outer ring, the outer ring is sleeved on the inner ring, and the inner surface of the outer ring is a smooth surface; a retaining frame, the retaining frame is provided between the outer ring and the inner ring, the retaining frame is provided with a pocket, a roller is installed in the pocket, and the retaining frame The frame is connected to a protruding portion along its axial direction at one end close to the limiting boss. When the protruding portion contacts the limiting boss, the roller is located in the first raceway and can rotate freely, and the inner ring and the outer ring maintain relative rotation; an elastic member, the elastic member is arranged on the outer circumferential surface of the inner ring, and pushes the protruding portion to rotate until it disengages from the limiting boss or maintains the trend of pushing the protruding portion to rotate. When the protruding portion disengages from the limiting boss, the roller is clamped between the second raceway and the outer ring, and the inner ring and the outer ring maintain integral rotation.

[0005] Preferably, the cross section of the first raceway is arc-shaped, and there is a clearance fit between the first raceway and the roller.

[0006] Preferably, the cross section of the second raceway is wedge-shaped, and the distance from the second raceway to the inner surface of the outer ring gradually decreases along the counterclockwise rotation direction to be smaller than the diameter of the roller.

[0007] Preferably, the outer peripheral surface of the inner ring forms an annular boss, the limiting boss and the elastic member are alternately arranged on the annular boss, and the protruding portion is mounted on the annular boss.

[0008] Preferably, a first bearing, a spacer sleeve and a first locking assembly are further provided between the inner ring and the outer ring. The first bearing is located on the other side of the raceway portion. The first bearing is a double-row angular contact ball bearing. The spacer sleeve is located between the first bearing and the raceway. A first locking assembly is installed on the other side of the first bearing to achieve axial locking of the first bearing and the spacer sleeve.

[0009] Preferably, one end of the retaining frame away from the protruding portion is mounted on the spacer sleeve, and a limiting portion is provided on the spacer sleeve to achieve axial locking of the retaining frame.

[0010] Preferably, a first oil hole, a second oil hole and a third oil hole are provided through the circumference of the inner ring, and the first oil hole is connected to the first raceway, the second oil hole is connected to the elastic member, and the third oil hole is connected to the first bearing.

[0011] Preferably, a bearing mounting seat is further provided on a side of the annular boss away from the raceway portion, and a second bearing is mounted on the bearing mounting seat and is circumferentially and axially locked by a second locking assembly.

[0012] Preferably, bolt holes and connecting bolts are further provided on the circumference of the outer ring.

[0013] Another aspect of the present invention provides a helicopter, comprising the roller clutch.

[0014] Compared with the prior art, the roller clutch and helicopter provided by the utility model have the following beneficial effects: the utility model realizes the positioning of the retaining frame and the roller by extending a protrusion at one end of the retaining frame, which cooperates with the limiting boss and elastic member arranged on the outer peripheral surface of the inner ring. This is not only conducive to the installation and disassembly of the roller, but also makes the process simpler and more efficient. It also effectively reduces the deflection of the retaining frame under high-speed conditions and can transmit greater torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0016] Figure 1 This is an exploded schematic diagram of the mid-column clutch of the present invention;

[0017] Figure 2 This is a schematic axial cross-sectional view of the mid-column clutch of the present invention;

[0018] Figure 3 BB is a schematic transverse cross-section diagram of the mid-column clutch of the present invention;

[0019] Figure 4 Schematic diagram of CC transverse section of the middle column clutch of the present invention;

[0020] Figure 5 For this utility model Figure 4 A partial enlarged view of area A in the middle;

[0021] Figure 6 This is a schematic diagram of the DD transverse cross section of the utility model mid-column clutch.

[0022] Explanation of the accompanying drawings: 1. Inner ring; 11. Raceway portion; 111. First raceway; 112. Second raceway; 12. Annular boss; 121. Limiting boss; 131. First oil hole; 132. Second oil hole; 133. Third oil hole; 2. Outer ring; 21. Bolt hole; 22. Connecting bolt; 3. Retaining frame; 31. Pocket; 32. Roller; 33. Extension portion; 4. Elastic member; 41. Spring element; 42. Bushing; 43. Pin; 5. First bearing; 6. Spacer sleeve; 61. Limiting portion; 7. First locking assembly; 8. Second bearing; 9. Second locking assembly. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] To simplify the drawings, only the parts relevant to the present invention are schematically shown in each figure. They do not represent the actual structure of the product. In addition, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one."

[0025] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0026] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0027] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0029] See also Figures 1 to 6 The utility model discloses a roller clutch, which is mainly used in the field of helicopters to achieve the transmission of large torque. The roller clutch includes an inner ring 1, an outer ring 2, a retaining frame 3 and an elastic member 4.

[0030] The outer circumference of the inner ring 1 is provided with a raceway portion 11 and an annular boss 12. The raceway portion 11 is composed of adjacent and alternating first and second raceways 111 and 112. The annular boss 12 is located on one side of the raceway portion 11 and is provided with multiple position-limiting bosses 121. The outer ring 2 is sleeved onto the inner ring 1, and the inner surface of the outer ring 2 is a cylindrical, smooth surface.

[0031] A retainer 3 and a first bearing 5 are positioned between the inner ring 1 and the outer ring 2. The retainer 3 is aligned with the raceway 11 and has pockets 31 formed therein, within which rollers 32 are mounted. The first bearing 5 is a double-row angular contact ball bearing located on the other side of the raceway 11, providing a rotational connection between the inner ring 1 and the outer ring 2.

[0032] See attached Figure 5 The first raceway 111 has an arcuate cross-section, and a clearance fit exists between the first raceway 111 and the roller 32. The roller 32 is located within the first raceway 111 and can rotate freely, allowing the inner ring 1 and outer ring 2 to rotate relative to each other. The second raceway 112 has a wedge-shaped cross-section, and the distance from the second raceway 112 to the inner surface of the outer ring 2 gradually decreases counterclockwise to less than the diameter of the roller 32. When the roller 32 is located on the second raceway 112, the inner ring 1 and outer ring 2 rotate integrally.

[0033] See attached Figure 1 An extension 33 is axially connected to one end of the retainer 3 near the limiting boss 121. The extension 33 is mounted on the annular boss 12. Elastic members 4 are also distributed on the annular boss 12. The limiting boss 121 and the elastic members 4 are alternately arranged on the annular boss 12. The elastic members 4 can push the extension 33 to rotate away from the limiting boss 121 or maintain the tendency to push the extension 33 to rotate.

[0034] See attached Figure 3 The elastic part 4 includes a bushing 42, a pin 43 and a spring element 41. The bushing 42 is arranged along the circumference of the inner ring 1. The pin 43 is slidably installed on the bushing 42, and a spring element 41 is arranged in the bushing 42. The spring element 41 can drive the pin 43 to move linearly along the axis of the bushing 42, thereby pushing the retainer 3 to rotate.

[0035] During assembly, the retainer 3 is rotated to overcome the elastic force of the elastic member 4, maintaining contact between the extension 33 and the limiting boss 121. The pocket 31 is now aligned with the first raceway 111, exposing the inner first raceway 111. This allows the roller 32 to be easily inserted into the pocket 31. Then, under the action of the elastic member 4, the retainer 3 rotates a certain angle until the roller 32 is pushed into the second raceway 112. The roller 32 is then clamped between the second raceway 112 and the outer ring 2, completing assembly. The disassembly process is the opposite and will not be described in detail here.

[0036] During use, the outer ring 2 is connected to the power source (such as an engine). When the outer ring 2 rotates counterclockwise, the roller 32 is clamped between the second raceway 112 and the outer ring 2. The inner ring 1 and the outer ring 2 are engaged and rotate as a whole, so that a large torque can be transmitted. When the outer ring 2 slows down or stops rotating, the inner ring 1 continues to rotate counterclockwise due to inertia. The inner ring 1 will drive the retaining frame 3 to rotate, overcoming the elastic force of the elastic member 4 until the protrusion 33 and the limiting boss 121 are counteracted. The roller 32 is located in the first raceway 111 and can rotate freely. The inner ring 1 and the outer ring 2 maintain relative rotation to achieve overtaking, thereby avoiding the power source from following the rotation and causing damage to the power source.

[0037] See attached Figure 2 A spacer sleeve 6 and a first locking assembly 7 are also provided between the inner ring 1 and the outer ring 2. The spacer sleeve 6 is located between the first bearing 5 and the raceway. The first locking assembly 7 is mounted on the other side of the first bearing 5 to achieve axial locking of the first bearing 5 and the spacer sleeve 6. The end of the retainer 3, away from the extension 33, is mounted on the spacer sleeve 6, and a limit portion 61 is provided on the spacer sleeve 6 to achieve axial locking of the retainer 3.

[0038] See attached Figure 2 A first oil hole 131, a second oil hole 132, and a third oil hole 133 are provided along the circumference of the inner ring 1. The first oil hole 131 communicates with the first raceway 111 to lubricate the roller 32. The second oil hole 132 communicates with the elastic member 4 to lubricate the bushing 42 and the pin 43. The third oil hole 133 communicates with the first bearing 5 to lubricate the first bearing 5.

[0039] A bearing mounting seat is also provided on the side of the annular boss 12 away from the raceway portion 11, and a second bearing 8 is installed on the bearing mounting seat. The outer ring 2 of the second bearing 8 is connected to the drive source and is axially locked in the circumferential direction by a second locking assembly 9. Bolt holes 21 are also provided in the circumference of the outer ring 2, and the connection between the outer ring 2 and the drive source is achieved by connecting bolts 22 to realize power transmission.

[0040] In this embodiment, the power source is in driving connection with the outer ring 2, the load is connected to the inner ring 1, and the roller clutch achieves power transmission and overrunning. In other embodiments, the power source may be in driving connection with the inner ring 1, the load is connected to the outer ring 2, and the roller clutch may also achieve power transmission and overrunning.

[0041] It will be apparent to those skilled in the art that various modifications and variations can be made to the exemplary embodiments described above without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations of the present invention that fall within the scope of the appended claims and their equivalents.

Claims

1. A roller clutch, characterized in that: include: An inner ring, wherein the outer circumferential surface of the inner ring is provided with a raceway portion and a limiting boss, the raceway portion is composed of a first raceway and a second raceway that are adjacently and alternately arranged, and the limiting boss is located on one side of the raceway portion; An outer ring, the outer ring being sleeved on the inner ring, and the inner surface of the outer ring being a smooth surface; a retainer disposed between the outer ring and the inner ring, the retainer having pockets formed therein, with rollers mounted in the pockets; an extension portion axially connected to one end of the retainer adjacent to the limiting boss; when the extension portion contacts the limiting boss, the roller is positioned within the first raceway and can rotate freely, and the inner ring and the outer ring maintain relative rotation; An elastic member is provided on the outer circumference of the inner ring, pushing the extension portion to rotate until it disengages from the limiting boss or maintains the tendency to push the extension portion to rotate. When the extension portion disengages from the limiting boss, the roller is clamped between the second raceway and the outer ring, and the inner ring and the outer ring rotate as one.

2. The roller clutch according to claim 1, wherein: The cross section of the first raceway is arc-shaped, and there is a clearance fit between the first raceway and the roller.

3. The roller clutch according to claim 1, wherein: The cross section of the second raceway is wedge-shaped, and the distance from the second raceway to the inner surface of the outer ring gradually decreases along the counterclockwise rotation direction to be smaller than the diameter of the roller.

4. The roller clutch according to claim 3, wherein: An annular boss is formed on the outer circumferential surface of the inner ring, the limiting boss and the elastic member are alternately arranged on the annular boss, and the protruding portion is mounted on the annular boss.

5. The roller clutch according to claim 4, wherein: A first bearing, a spacer sleeve and a first locking assembly are also provided between the inner ring and the outer ring. The first bearing is located on the other side of the raceway portion. The first bearing is a double-row angular contact ball bearing. The spacer sleeve is located between the first bearing and the raceway. A first locking assembly is installed on the other side of the first bearing to achieve axial locking of the first bearing and the spacer sleeve.

6. The roller clutch according to claim 5, wherein: One end of the retainer away from the protruding portion is mounted on the spacer sleeve, and a limiting portion is provided on the spacer sleeve to achieve axial locking of the retainer.

7. The roller clutch according to claim 6, wherein: A first oil hole, a second oil hole and a third oil hole are provided through the circumference of the inner ring, and the first oil hole is connected to the first raceway, the second oil hole is connected to the elastic member, and the third oil hole is connected to the first bearing.

8. The roller clutch according to claim 7, wherein: A bearing mounting seat is further provided on a side of the annular boss away from the raceway portion, and a second bearing is mounted on the bearing mounting seat and is circumferentially and axially locked by a second locking assembly.

9. The roller clutch according to claim 8, wherein: Bolt holes and connecting bolts are also provided on the circumference of the outer ring.

10. A helicopter, characterized in that: A roller clutch comprising the roller clutch according to any one of claims 1 to 9.

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