An overrunning clutch

Abstract

This invention relates to the field of mechanical transmission technology, and more particularly to an overrunning clutch. The overrunning clutch includes inner and outer rotating components and a transmission wedge. The transmission wedge has an outer contact surface and an inner contact surface. A spring mounting groove is provided at the end of the transmission wedge, in which a ring spring is installed. The ring spring radially supports the transmission wedge, causing the outer contact surface of each transmission wedge to contact the outer rotating component. The spring mating surface of the spring mounting groove that contacts the ring spring is inclined, so that in its natural state, the inner contact surface of the transmission wedge is separated from the inner rotating component. When the outer rotating component rotates forward, the transmission wedge rotates accordingly and, under the action of centrifugal force, overcomes the pressing action of the ring spring and wobbles around the outer rotating component until the inner contact surface contacts and weds into the inner rotating component. Thus, transmission between the inner and outer rotating components is achieved through the transmission wedge. This clutch avoids friction between the transmission wedge and the inner rotating component, extending the clutch's service life.

Description

Technical Field

[0001] This invention relates to the field of clutch technology, and more particularly to an overrunning clutch. Background Technology

[0002] The clutch is an important component of the mechatronic transmission system. In the aviation field, the overrunning clutch is mainly used in the aircraft turbine starter gearbox, connecting the starter and the engine. Its main function is to transmit torque during the starter's engine start-up process and cut off power transmission after the engine starts. It is also required to have a restart function in the air.

[0003] Chinese utility model patent CN204755657U discloses a cam-type wedge one-way overrunning clutch. The clutch includes an outer ring sleeved on the outside of a rotating shaft. Several circumferentially evenly distributed wedges are provided between the inner circumferential surface of the outer ring and the rotating shaft. The wedges are cylindrical bodies with a cam-shaped cross-section. Both ends of the wedges are provided with outwardly protruding flanges. The outer circumferential surface of the wedge on one side of the flange constitutes the outer working surface of the wedge for contact with the outer ring. The outer circumferential surface of the wedge on the other side constitutes the inner working surface for contact with the rotating shaft. The clutch also includes springs connected end to end. The springs are radially supported on the flanges of the wedges, pressing the outer working surfaces of each wedge against the inner circumferential surface of the outer ring.

[0004] When this clutch is in use, both the outer ring and the shaft can act as driving components. Therefore, the wedge is always in contact with the outer ring and the shaft. This means that even when the clutch is disengaged, the wedge is still in contact with the outer ring and the shaft, which will affect the service life of the clutch. It also generates high heat, which will affect the performance of bearings and other parts, thus reducing the life of the reducer. In addition, it increases the requirements for lubrication and cooling. Therefore, it is not suitable for transmission between starter and generator. Summary of the Invention

[0005] The purpose of this invention is to provide an overrunning clutch to solve the problem in the prior art where the clutch wedge and the inner rotating part are always in contact and rub against each other, which affects the service life of the clutch and the performance of bearings and other parts.

[0006] To achieve the above objectives, the overrunning clutch of the present invention adopts the following technical solution:

[0007] An overrunning clutch includes an inner rotating component and an outer rotating component. Multiple transmission wedges are evenly spaced in the circumferential direction between the inner and outer rotating components. Each transmission wedge has an outer contact surface for contacting the outer rotating component and an inner contact surface for contacting the inner rotating component. A spring mounting groove is provided at the end of each transmission wedge, in which a ring spring is installed. The ring spring radially supports the transmission wedge, causing the outer contact surface of each transmission wedge to contact the outer rotating component. In its natural state, the inner contact surface of the transmission wedge is separated from the inner rotating component. When the outer rotating component rotates forward, the transmission wedge rotates accordingly and, under the action of centrifugal force, overcomes the pressing action of the ring spring and wobbles around the outer rotating component until the inner contact surface contacts and weds into the inner rotating component. Thus, the transmission between the inner and outer rotating components is realized through the transmission wedges.

[0008] Beneficial effects: In its natural state, the inner contact surface of the transmission wedge separates from the inner rotating component. When the outer rotating component rotates in the forward direction, the transmission wedge rotates accordingly. When the centrifugal force overcomes the pressing force of the ring spring, the transmission wedge will oscillate around the outer rotating component until the inner contact surface contacts and weds tightly with the inner rotating component. Thus, the transmission between the outer and inner rotating components is realized through the transmission wedge. When the speed of the inner rotating component exceeds the speed of the outer rotating component, the clutch is in an overrunning state. At this time, the power source of the outer rotating component is turned off, and the speed of the outer rotating component gradually decreases, and the centrifugal force gradually decreases until the centrifugal force is less than the pressing force of the ring spring. The transmission wedge will oscillate in the direction of release until the inner contact surface separates from the inner rotating component and no longer contacts it. This can avoid friction and extend the service life of the clutch.

[0009] Furthermore, the inner and outer contact surfaces include inner and outer matching contact surfaces, respectively. When the inner end of the transmission wedge continues to deflect after contacting the inner rotating component, the inner matching contact surface rolls with the inner rotating component, and the outer matching contact surface rolls with the outer rotating component. The wedging force between the transmission wedge and the inner and outer rotating components gradually increases.

[0010] Beneficial effects: When the load on the inner rotating component is small, after the inner end of the transmission wedge contacts the inner rotating component, the transmission wedge can continue to deflect at a small angle to achieve transmission between the inner and outer rotating components. When the load on the inner rotating component is large, after the inner end of the transmission wedge contacts the inner rotating component, the transmission wedge can continue to deflect at a large angle to achieve transmission between the inner and outer rotating components. This allows the clutch to be applicable to different loads and has a wide range of applications.

[0011] Furthermore, the transmission wedge has a first limiting surface and a second limiting surface on its two circumferential sides respectively. In two adjacent transmission wedges, the first limiting surface of one transmission wedge is engaged with the second limiting surface of the other transmission wedge to limit the maximum wedge force and the maximum sway angle of the transmission wedge.

[0012] Beneficial effects: By setting the first and second limiting surfaces on the transmission wedge, two adjacent transmission wedges can form a blocking engagement when they swing to a certain angle, thereby limiting the maximum wedge clamping force and the maximum swing angle of the transmission wedge, preventing the transmission wedge from swinging too far, and at the same time protecting the transmission wedge.

[0013] Furthermore, the first limiting surface is a limiting arc surface, and the second limiting surface is a limiting plane. The first and second limiting surfaces are tangent when they are engaged in a blocking action.

[0014] Beneficial effects: It can reduce the wear between the first and second limiting surfaces and provide a certain degree of protection for the transmission wedge.

[0015] Furthermore, the transmission wedge has a first stop surface and a second stop surface on its two circumferential sides respectively. In two adjacent transmission wedges, the first stop surface of one transmission wedge engages with the second stop surface of the other transmission wedge to position the transmission wedge in its natural state.

[0016] Beneficial effects: Limiting the tilt angle of the outer end of the transmission wedge in its natural state allows for the arrangement of as many transmission wedges as possible between the inner and outer rotating parts, thereby improving the clutch's load-bearing capacity.

[0017] Furthermore, the first limiting surface constitutes the first stopping surface, and the second stopping surface is a stopping plane. The stopping plane and the limiting plane are on the same side of the transmission wedge and have an included angle. The stopping plane is located inside the limiting plane.

[0018] Beneficial effects: The first stop surface and the first limiting surface are the same arc surface. Only one limiting arc surface needs to be machined on the transmission wedge to form a stop fit with two planes with included angles, thereby simplifying the wedge manufacturing and facilitating the wedge processing.

[0019] Furthermore, the overrunning clutch also includes a cage with a U-shaped cross-section that opens inward. The circumferential portion of the cage has a wedge mounting hole, in which a transmission wedge is installed. An annular spring supports the inner side of the circumferential portion of the cage.

[0020] Beneficial effect: The ring spring can be limited by the retainer, so that the ring spring is stably set in the spring mounting slot.

[0021] Furthermore, the spring mounting groove is a U-shaped groove, and the outer groove wall of the spring mounting groove is a spring mating surface for pressing and engaging with the annular spring.

[0022] Beneficial effect: The U-shaped groove can better limit the ring spring and prevent it from falling off.

[0023] Furthermore, the ring spring is formed by connecting the two ends of a helical compression spring.

[0024] Beneficial effect: Makes the processing of ring springs easier.

[0025] Furthermore, the helical compression spring includes a cylindrical segment and a tapered segment located at one end of the cylindrical segment, and the connection is achieved by inserting the tapered segment into the other end of the cylindrical segment.

[0026] Beneficial effect: Makes it easier to connect the two ends of a helical compression spring. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the installation location of the overrunning clutch of the present invention in an aircraft starter;

[0028] Figure 2 This is a schematic diagram of the overrunning clutch of the present invention;

[0029] Figure 3 This is a schematic diagram of the cage structure;

[0030] Figure 4 This is a cross-sectional view of the transmission wedge.

[0031] Figure 5 This is an isometric view of the transmission wedge.

[0032] Figure 6 The initial position of the transmission wedge block;

[0033] Figure 7 for Figure 6 Enlarged view of point K;

[0034] Figure 8 The orientation of the transmission wedge block when it is in the limit position;

[0035] Figure 9 This is a force diagram showing the interaction between the transmission wedge and the inner rotating component.

[0036] Figure 10 This is a schematic diagram of a helical compression spring;

[0037] In the diagram: 1. Inner rotating component; 2. Outer rotating component; 3. Cage; 301. Wedge mounting hole; 4. Transmission wedge; 401. Outer contact surface; 402. First limiting surface; 403. Inner contact surface; 404. Second stop surface; 405. Second limiting surface; 406. Spring mounting groove; 407. Outer groove wall; 5. Ring spring; 501. Cylindrical section; 502. Conical section; 6. Planetary reducer sun gear. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, and not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0040] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0041] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0042] Embodiment 1 of the overrunning clutch of the present invention:

[0043] like Figure 2 As shown, the overrunning clutch includes an inner rotating component 1, an outer rotating component 2, and a retainer 3 disposed between the inner and outer rotating components. Several transmission wedges 4 are mounted on the retainer 3. Each transmission wedge 4 has an outer contact surface 401 and an inner contact surface 403. The outer contact surface 401 is used to contact the outer rotating component 2, and the inner contact surface 403 is used to contact the inner rotating component 1 when the inner and outer rotating components are in a powered engagement state. Both ends of the transmission wedge 4 are provided with spring mounting grooves 406. Annular springs 5 ​​are installed in the spring mounting grooves 406. The annular springs 5 ​​radially tighten the transmission wedges 4 so that the outer contact surface 401 of each transmission wedge 4 contacts the outer rotating component 2.

[0044] The cross-section of cage 3 is a U-shape with the opening facing inward, such as... Figure 3As shown, a plurality of wedge mounting holes 301 are evenly provided on the circumferential part of the retainer 3. The transmission wedge 4 is installed in the wedge mounting holes 301. The annular spring 5 is supported on the inner side of the circumferential part of the retainer 3. The retainer 3 limits the annular spring 5, so that the annular spring 5 is stably installed in the spring mounting groove 406.

[0045] Spring mounting slot 406 is a U-shaped slot, such as Figure 5 As shown, the annular spring 5 radially presses against the outer wall 407 of the U-shaped groove, thus radially tightening each transmission wedge 4 outward. The outer wall 407 of the U-shaped groove has a specific inclination angle, which allows the transmission wedge 4 to tilt up at a certain angle, separating the inner contact surface 403 of the transmission wedge 4 from the inner rotating member 1 in its natural state. When the outer rotating member 2 rotates forward, the transmission wedge 4 rotates accordingly. When the centrifugal force overcomes the pressing action of the annular spring 5, the transmission wedge 4 oscillates around the outer rotating member 2 until the inner contact surface 403 contacts and weds tightly with the inner rotating member 1, thus realizing the transmission between the inner and outer rotating members through the transmission wedge 4.

[0046] The inner and outer contact surfaces include inner and outer matching contact surfaces, respectively. When the load on the inner rotating part is large, the inner end of the transmission wedge 4 continues to swing after contacting the inner rotating part 1. The inner matching contact surface rolls with the inner rotating part 1, and the outer matching contact surface rolls with the outer rotating part 2. The wedging force between the transmission wedge 4 and the inner and outer rotating parts gradually increases.

[0047] like Figure 4 As shown, the transmission wedge 4 also has three limiting surfaces in its circumferential direction, defined as a first limiting surface 402, a second limiting surface 405, and a second stop surface 404, respectively. The first limiting surface 402 is a limiting arc surface, the second limiting surface 405 is a limiting plane, and the second stop surface 404 is a stop plane. The second limiting surface 405 and the second stop surface 404 are located on the same side of the transmission wedge in its circumferential direction and have an included angle. The second stop surface 404 is located inside the second limiting surface 405, and the lower edge of the second limiting surface 405 connects to the upper edge of the second stop surface 404. The first limiting surface 402 is located on the opposite side of the transmission wedge in its circumferential direction, and the first limiting surface 402 also constitutes the first stop surface.

[0048] In two adjacent transmission wedges, the first limiting surface 402 of one transmission wedge can engage with the second limiting surface 405 of the other transmission wedge to limit the maximum wedging force and maximum sway angle of the transmission wedge 4, preventing excessive sway of the transmission wedge 4. The first and second limiting surfaces are tangent when engaged, which reduces the wear between the first and second limiting surfaces and provides some protection for the transmission wedge 4. In two adjacent transmission wedges, the first stopping surface, i.e., the first limiting surface 402, of one transmission wedge can engage with the second stopping surface 404 of the other transmission wedge to position the transmission wedge 4 in its natural state. This allows for the arrangement of as many transmission wedges as possible between the inner and outer rotating parts, thereby improving the clutch's load-bearing capacity.

[0049] When the transmission wedge 4 is in the position as Figure 4 A coordinate system is established at the angle shown. At this time, the angle γ between the second stop surface 404 and the horizontal reference plane is 105°, and the angle θ between the second limiting surface 405 and the horizontal reference plane is 80°. The angle α between the outer groove wall 407 of the spring mounting groove 406 and the horizontal reference plane is 25°, and the angle β between the inner groove wall and the horizontal reference plane is 12°. The width d of the spring mounting groove 406 is 1.6 times the outer diameter of the annular spring 5, and the depth h is 1.44 times the outer diameter of the annular spring 5.

[0050] The transmission wedge 4 has an initial position and a limit position within its deflection stroke. When the transmission wedge 4 is in the initial position, as shown in Figure 6, under the action of the annular spring 5, the first stopping surface (i.e., the first limiting surface 402) of one of the two adjacent transmission wedges 4 is in a stop engagement with the second stopping surface 404 of the other transmission wedge 4; when the transmission wedge 4 is in the limit position, as shown in Figure 6, the transmission wedge 4 has an initial position and a limit position. Figure 8 As shown, in two adjacent transmission wedges 4, the first limiting surface 402 of one transmission wedge 4 and the second limiting surface 405 of the other transmission wedge 4 are engaged and tangent to each other. All the transmission wedges 4 in the circumferential direction form a mutually coupled whole. At this time, after the ultimate load is exceeded, the inner rotating part 1 and the transmission wedge 4 will slip, thereby ensuring that the transmission wedge 4 will not flip or jam when the clutch is subjected to the ultimate torque. After the ultimate load is unloaded, the transmission wedge 4 returns to the normal state under the action of the spring force and can continue to work normally.

[0051] The ring spring 5 is formed by screwing the ends of a helical compression spring together, as follows: Figure 10 As shown, the helical compression spring includes a cylindrical section 501 and a tapered section 502 located at one end of the cylindrical section 501. The tapered section 502 has a cone angle of 12° and has 3 turns. The outer diameter d1 of the annular spring 5 is 2.5 mm. In use, the tapered section 502 is inserted into the other end of the cylindrical section 501 to achieve connection.

[0052] The working state of the overrunning clutch is explained below based on the force analysis of the transmission wedge:

[0053] When the transmission wedge 4 engages with the inner rotating part 1, as Figure 9 As shown, the contact point between the outer contact surface 401 of the transmission wedge 4 and the outer rotating part 2 is defined as point A, and the contact point between the inner contact surface 403 and the inner rotating part 1 is defined as point B. The straight line passing through points A and B is the contact line. The center of gravity of the transmission wedge 4 and the spring support point are located on the left and right sides of the contact line. When the center of gravity of the transmission wedge 4 rotates, that is, when the transmission wedge 4 rotates around the center of the outer rotating part 2 or the inner rotating part 1, the centrifugal force F2 generated causes the transmission wedge 4 to deflect in the wedge-tightening direction around the contact point A. L2 is the lever arm of F2 about point A. The force F1 exerted by the ring spring 5 on the transmission wedge 4 is a restoring force, which causes the transmission wedge 4 to deflect in the loosening direction around the contact point A. L1 is the lever arm of F1 about point A.

[0054] In the initial state, the transmission wedge is in the position as follows Figure 6 In the state shown, the centrifugal force is zero, and the transmission wedge 4 is in contact with the outer rotating part 2 under the action of the ring spring 5, with a gap between it and the inner rotating part 1. Figure 7 As shown; when the outer rotating part 2 rotates, the transmission wedge 4 begins to bear centrifugal force. When the speed of the outer rotating part 2 is low, the torque of the centrifugal force on the transmission wedge 4 is less than the torque of the ring spring 5. At this time, the transmission wedge 4 will not deflect and will continue to rotate with the outer rotating part 2. The transmission wedge 4 and the inner rotating part 1 are still not in contact. As the speed of the outer rotating part 2 increases, the torque of the centrifugal force gradually increases. When F2×L2>F1×L1, the transmission wedge 4 will deflect clockwise from point A. At this time, the outer contact surface 401 and the outer rotating part 2 roll into contact until the inner contact surface 403 contacts and weds tightly with the inner rotating part 1, and the torque begins to be transmitted. When the load on the inner rotating part 1 is large, the transmission wedge 4 continues to deflect, wedging tighter and tighter with the inner and outer rotating parts, until it reaches the point shown in the figure. Figure 8 The limit wedge tightness shown is such that when the limit load is exceeded, the inner rotating part 1 will slip to ensure that the transmission wedge 4 will not flip or jam when the clutch is subjected to the limit torque. When the speed of the outer rotating part 2 decreases, the torque of the centrifugal force gradually decreases. When F2×L2<F1×L1, the transmission wedge 4 will disengage from the inner rotating part 1 and the transmission wedge 4 will deflect counterclockwise under the force of the ring spring 5 and return to the initial position.

[0055] The aforementioned overrunning clutch is installed in the aircraft starter gearbox, such as... Figure 1As shown, the outer rotating part 2 is connected to the axle of the sun gear 6 of the planetary reducer, and the inner rotating part 1 is used to connect to the engine input shaft to drive the engine to start. When the starter motor is first started, the transmission wedge 4 is not in contact with the inner rotating part 1, and the overrunning clutch cannot transmit torque. As the starter motor speed increases, when the speed reaches a predetermined value, the transmission wedge 4 begins to deflect under the action of centrifugal force and compresses the ring spring 5. When the torque of the centrifugal force relative to the raceway contact point of the outer rotating part 2 is greater than the torque of the spring force acting on the transmission wedge 4 on the raceway contact point of the outer rotating part 2, the transmission wedge 4 begins to contact and wed tightly with the inner rotating part 1 to transmit torque and drive the engine to work. After the engine starts successfully, the speed will rise rapidly. When the engine speed exceeds that of the starter motor, the clutch is in an overrunning state. At this time, the starter motor is closed, and the speed of the outer rotating part 2 of the clutch will gradually decrease. The centrifugal force on the transmission wedge 4 will decrease accordingly. When the torque of the centrifugal force relative to the raceway contact point of the outer rotating part 2 is less than the torque of the spring force acting on the transmission wedge 4 on the raceway contact point of the outer rotating part 2, the transmission wedge 4 disengages from the inner rotating part 1. After this, the transmission wedge 4 and the inner rotating part 1 no longer contact each other, thereby avoiding friction and extending the service life of the clutch. In practical use, the speed at which the clutch engages or disengages can be adjusted by changing the stiffness or length of the ring spring 5 or by changing the center of gravity of the transmission wedge 4.

[0056] Example 2: The difference from Example 1 is that in Example 1, the transmission wedge has a first limiting surface and a second limiting surface on both sides of its circumference. The first limiting surface is a limiting arc surface, and the second limiting surface is a limiting plane. The first and second limiting surfaces are tangent when they are engaged. The transmission wedge also has a first stopping surface and a second stopping surface on both sides of its circumference. The second stopping surface is a stopping plane and is on the same side as the second limiting surface. The first stopping surface and the first limiting surface are the same arc surface. In Example 2, the first stopping surface and the first limiting surface are on the same side and are two independent arc surfaces.

[0057] In other embodiments, the first stop surface and the first limiting surface may also be two independent planes, which are used to stop and cooperate with the second stop surface and the second limiting surface on the other side, respectively.

[0058] Example 3: The difference from Example 1 is that in Example 1, the overrunning clutch includes a cage with an inward-facing U-shaped cross-section, a drive wedge is mounted on the circumferential portion of the cage, and an annular spring supports the inner side of the circumferential portion of the cage. In Example 3, the overrunning clutch does not have a cage, and a baffle is provided at the end of the outer rotating part, with the annular spring supporting the baffle.

[0059] Example 4: The difference from Example 1 is that in Example 1, the end of the transmission wedge is provided with a spring mounting groove, which is a U-shaped groove, and the outer wall of the spring mounting groove is pressed and engaged with the annular spring. In Example 4, the spring mounting groove adopts the structure of the spring mounting groove in the prior art as described in the background art.

[0060] Example 5: The difference from Example 1 is that in Example 1, the annular spring is formed by connecting the two ends of a helical compression spring, while in Example 5, the annular spring is formed by welding the two ends of a helical compression spring.

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. An overrunning clutch, comprising an inner rotating component and an outer rotating component, wherein a plurality of transmission wedges are evenly spaced between the inner and outer rotating components in the circumferential direction, characterized in that: The outer rotating component is used for starter motor transmission connection, and the inner rotating component is used for engine transmission connection. The transmission wedge has an outer contact surface that is always in contact with the outer rotating component and an inner contact surface that is in contact with the inner rotating component when wedged. The end of the transmission wedge is provided with a spring mounting groove, in which a ring spring is installed. The center of gravity of the transmission wedge and the support point of the ring spring on the transmission wedge are located on both sides of the line connecting the contact point between the outer contact surface and the outer rotating component and the contact point between the inner contact surface and the inner rotating component, respectively. The annular spring radially supports the transmission wedges and, in its natural state, causes the outer contact surface of each transmission wedge to contact the outer rotating component, while the inner contact surface separates from the inner rotating component. The transmission wedge has a limiting plane, a stopping plane, and a limiting arc surface in its circumferential direction. The limiting plane and the stopping plane are on the same side of the transmission wedge, and the limiting arc surface is on the other side. Within the deflection stroke of the transmission wedge, two adjacent transmission wedges are positioned such that, in the initial position, the limiting arc surface of one wedge stops and positions the stopping plane of the other wedge, and in the extreme position, the limiting arc surface of one wedge stops and limits the stopping plane of the other wedge. The stopping plane and the limiting plane have an included angle and convex outward at the junction. The limiting arc surface is the same arc surface that mates with the limiting plane and the stopping plane respectively. When the outer rotating part rotates in the forward direction, the transmission wedge block rotates accordingly and overcomes the pressing action of the ring spring under the action of centrifugal force, and swings in the forward direction around the outer rotating part. When the centrifugal torque is greater than the elastic torque, the inner contact surface contacts and weds tightly with the inner rotating part, and then the transmission from the outer rotating part to the inner rotating part is realized through the transmission wedge block. When the load on the internal rotating parts is large, the transmission wedge continues to wobble until it reaches the limit wedge tightness. As the rotational speed of the outer rotating component decreases, the centrifugal force of the transmission wedge decreases, and under the action of the ring spring, it swings in the opposite direction, causing the inner contact surface to separate from the inner rotating component until it returns to its natural state.

2. The overrunning clutch according to claim 1, characterized in that: The inner and outer contact surfaces include inner and outer matching contact surfaces, respectively. When the inner end of the transmission wedge continues to deflect after contacting the inner rotating part, the inner matching contact surface rolls with the inner rotating part, and the outer matching contact surface rolls with the outer rotating part. The wedging force between the transmission wedge and the inner and outer rotating parts gradually increases.

3. The overrunning clutch according to claim 1, characterized in that: The angle between the limiting plane and the stopping plane is 5°.

4. The overrunning clutch according to any one of claims 1-3, characterized in that: The overrunning clutch also includes a cage with an inward-facing U-shaped cross-section. The circumferential portion of the cage has wedge mounting holes, in which the drive wedge is installed. An annular spring supports the inner side of the circumferential portion of the cage.

5. The overrunning clutch according to any one of claims 1-3, characterized in that: The spring mounting groove is a U-shaped groove, and the outer groove wall of the spring mounting groove is a spring mating surface for pressing and engaging with the annular spring.

6. The overrunning clutch according to any one of claims 1-3, characterized in that: A ring spring is formed by connecting the two ends of a helical compression spring.

7. The overrunning clutch according to claim 6, characterized in that: A helical compression spring includes a cylindrical section and a tapered section located at one end of the cylindrical section, and the connection is achieved by inserting the tapered section into the other end of the cylindrical section.

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