One-way clutch pulley sleeve mechanism

Abstract

The utility model relates to one -way clutch pulley sleeve mechanism, including outer cam core, axle sleeve, stopper and spring roller assembly, spring roller assembly contains rolling element, elastic part and guide piece, guide piece includes guide block and guide rod, and the arc surface is pasted with rolling element to the one side of guide block and is equipped with, and the one end of guide rod is connected conical body (small end is far from guide block), and elastic part is set up in guide rod and is limited by stopper part. Guide block and guide rod are integrally formed, and the stop surface is equipped with spacing strip. The structure avoids rigid impact and jam through guide piece, and elastic part is guided stably, and force transmission efficiency is high, is applicable to the automobile power transmission system, and promotes work reliability and durability.

Description

Technical Field

[0001] This utility model specifically relates to a one-way clutch pulley sleeve mechanism. Background Technology

[0002] One-way clutch pulleys are key components widely used in automotive engines and other power transmission systems. Their primary function is to transmit power to other components such as alternators and air conditioning compressors through interaction with the drive belt during engine start-up and operation. Under specific operating conditions, the one-way clutch pulley allows the belt to rotate while disengaging in the opposite direction, thus protecting the equipment from damage.

[0003] For example, document CN210423487U discloses a durable one-way clutch for automotive start-stop motors, including a round rod with a wide plate fixed to its right side and a gear sleeved on its outer wall. The gear meshes with multiple protrusions on the inner wall of the disc. The outer wall of the disc contacts a ring through a protective mechanism. An outer ring is fixed to the outer wall of the ring, and the outer ring has grooves for connecting to the vehicle body output wheel.

[0004] The protective mechanism consists of a short rod, a sleeve, a first spring, and a cylinder, combined with the existing technology. Figure 3 It is known that the left side of the first spring is fixedly connected to the right side of the short rod, and the right side is fixedly connected to the right side of the inner wall of the sleeve. Under actual working conditions, when the first spring returns to its original state from compression (i.e., the sleeve and the short rod switch from a separated state to a "shaft-hole mating" state), the right end of the short rod is very likely to collide with the left inlet of the sleeve. Furthermore, since both are made of rigid metal materials, and there is continuous vibration interference in the engine compartment of the car, this collision cannot be eliminated by the existing structure. Instead, it will generate instantaneous stress peaks due to the rigid impact of "hard against hard". This high-frequency rigid impact (especially under the condition of frequent start-stop operation of the car) will directly cause fatigue wear on the mating surface of the short rod and the sleeve, aggravate the widening of the shaft-hole clearance, and after long-term accumulation, it will cause problems such as sluggish dynamic response of the protection mechanism and decreased buffering accuracy. In severe cases, it may even cause the one-way clutch function to fail. Utility Model Content

[0005] The technical problem to be solved by this utility model is to address the shortcomings of the prior art by providing a one-way clutch pulley sleeve mechanism with a guide component, thereby solving the problems of rigid impact, jamming, and instability of elastic components in the existing one-way clutch mechanism during operation.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a one-way clutch pulley sleeve mechanism, including an outer curved core wheel and a bushing sleeve fitted around the outer periphery of the outer curved core wheel. The outer wall of the outer curved core wheel is provided with several sets of circumferentially spaced and protruding blocks. A spring roller assembly is provided between each pair of adjacent blocks. The spring roller assembly includes a rolling element and a retractable elastic element. One side of the block intersects with the outer peripheral surface of the outer curved core wheel through a stop surface. An arc-shaped groove is provided between the other side of the block and the outer curved core wheel. The rolling element is movably disposed within the arc-shaped groove. The spring roller assembly is characterized in that: the spring roller assembly further includes a guide element distributed between the rolling element and the elastic element. One end of the guide element presses against the outer peripheral surface of the rolling element, one end of the elastic element is fitted onto the other end of the guide element, and the other end of the elastic element presses against the stop surface on one side of the block.

[0007] By adopting the above technical solution, the guide component replaces the "cylinder and short rod" in the prior art. The guide component itself does not undergo "extension and contraction," and one end of the elastic component is sleeved on the guide component. Therefore, when the rolling component changes position between two adjacent stops, the elastic component exhibits a flexible extension and contraction relative to the guide component, and no significant rigid impact occurs between the guide component and the rolling component (this is mainly because the pushing force of the elastic component keeps the guide component pressed against the rolling component). Thus, the problem of "jamming" can be avoided during the operation of the rolling component. Furthermore, the elastic component being sleeved on the guide component also prevents "overall twisting of the elastic component," guides the elastic component, and ensures stable and reliable changes in the direction of the elastic force. At the same time, it also prevents the elastic component from jumping along the axial direction of the outer curved core wheel, further improving the working reliability of the elastic component.

[0008] The aforementioned one-way clutch pulley sleeve mechanism can be further configured as follows: the guide member includes a guide block and a guide rod, one side of the guide block presses against the rolling member, one end of the guide rod is linked with the other side of the guide block, the end of the guide block extends towards the distance and forms a stop part, one end of the elastic member is sleeved on the guide rod, and one end of the elastic member presses against the stop part.

[0009] Using the above technical solution, the guide rod is used to axially guide the elastic element, and the stop at the end of the guide block stops and limits one end of the elastic element to prevent it from slipping out of the guide rod. Furthermore, under conditions such as severe vehicle body vibration, the rolling element may deflect while changing position between the two stops. In this case, the guide block may also deflect due to the influence of the rolling element. Since the elastic element is sleeved on the outer periphery of the guide rod, it will not deflect during the deflection of the guide rod.

[0010] The aforementioned one-way clutch pulley sleeve mechanism can be further configured such that: the other end of the guide rod is connected to a cone, and the small end of the cone faces away from the guide block.

[0011] By adopting the above technical solution and setting a conical body, during the expansion and contraction of the elastic element, part of the elastic element can smoothly fit into or slide out of the guide rod, avoiding jamming between the elastic element and the guide rod.

[0012] The aforementioned one-way clutch pulley sleeve mechanism can be further configured such that the guide block has an arc-shaped surface that fits against the outer circumferential surface of the rolling element on the side facing the rolling element.

[0013] By adopting the above technical solution, the arc-shaped surface fits snugly against the outer circumference of the rolling element, maintaining surface contact throughout the operation. This increases the contact area and improves force transmission efficiency. When the rolling element changes position between the two stops, the guide block can slide relative to the rolling element through the arc-shaped surface, automatically adapting to the working state of the rolling element. This not only ensures that the fit remains intact but also prevents jamming between the rolling element and the guide block.

[0014] The aforementioned one-way clutch pulley sleeve mechanism can be further configured such that the guide block and the guide rod are integrally formed.

[0015] The above technical solution facilitates the overall processing of the guide component and avoids relative displacement or deformation between the guide block and the guide rod.

[0016] The aforementioned one-way clutch pulley sleeve mechanism can be further configured such that the guide block has arc-shaped chamfers on both sides of its end face facing the guide rod.

[0017] By adopting the above technical solution, when the rolling element (which will also drive the guide block) changes position between the two stops, it avoids the guide block from rubbing against the outer circumferential surface of the outer curved core wheel and the inner circumferential surface of the bushing, thus protecting the guide block, the outer curved core wheel, and the bushing.

[0018] The aforementioned one-way clutch pulley sleeve mechanism can be further configured such that: a limiting strip is provided on the side of the stop surface away from the outer curved core wheel, the limiting strip intersects with the stop surface, and the limiting strip extends toward the side of the elastic member.

[0019] By adopting the above technical solution, the elastic element is limited by setting a limiting strip to prevent the end of the elastic element from sliding out of the stop surface.

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0022] Figure 2 This is a front view schematic diagram of an embodiment of the present utility model;

[0023] Figure 3 for Figure 2 Enlarged view of a portion of point A in the middle;

[0024] Figure 4 This is a schematic diagram of the guide component according to an embodiment of the present utility model.

[0025] Label annotations: 1. Stop block, 2. Rolling element, 3. Elastic element, 4. Guide element, 5. Guide block, 6. Stop part, 7. Conical body, 8. Arc surface, 9. Arc chamfer, 10. Limiting strip, 11. Outer curved core wheel, 12. Bushing, 13. Stop surface, 14. Arc groove, 15. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figures 1 to 4The one-way clutch pulley sleeve mechanism shown includes an outer curved core wheel 12 and a bushing 13 sleeved on the outer periphery of the outer curved core wheel 12. The outer wall of the outer curved core wheel 12 is provided with several sets of circumferentially spaced and protruding blocks 1. A set of spring roller assemblies is provided between each pair of adjacent blocks 1. The spring roller assembly includes a rolling element 2 and a retractable elastic element 3. One side of the block 1 intersects with the outer peripheral surface of the outer curved core wheel 12 through a stop surface 14. An arc groove 15 is provided between the other side of the block 1 and the outer curved core wheel 12. The rolling element 2 is movably disposed in the arc groove 15. The spring roller assembly also includes a guide element 4 distributed between the rolling element 2 and the elastic element 3. One end of the guide element 4 presses against the outer peripheral surface of the rolling element 2. One end of the elastic element 3 is sleeved on the other end of the guide element 4. The other end of the elastic element 3 presses against the stop surface 14 on one side of the block 1. The guide member 4 replaces the "cylinder and short rod" in the prior art. The guide member 4 itself does not "expand or retract," and one end of the elastic member 3 is sleeved on the guide member 4. Therefore, when the rolling member 2 changes position between two adjacent stops 1, the elastic member 3 flexibly expands and retracts relative to the guide member 4, and there is no large rigid impact between the guide member 4 and the rolling member 2 (this is mainly because the pushing force of the elastic member 3 keeps the guide member 4 pressed against the rolling member 2). Therefore, the rolling member 2 can avoid the problem of "jamming" during operation. Furthermore, the elastic member 3 being sleeved on the guide member 4 can also prevent "overall twisting of the elastic member 3," guide the elastic member 3, and ensure stable and reliable changes in the direction of the elastic force. At the same time, it can also prevent the elastic member 3 from jumping along the axial direction of the outer curved core wheel 12, further improving the working reliability of the elastic member 3.

[0028] The guide member 4 includes a guide block 5 and a guide rod 6. One side of the guide block 5 presses against the rolling member 2, and one end of the guide rod 6 is linked to the other side of the guide block 5. The end of the guide block 5 extends outward and forms a stop portion 7. One end of the elastic member 3 is sleeved on the guide rod 6, and the end of the elastic member 3 presses against the stop portion 7. The guide rod 6 is used to guide the elastic member 3 axially, and the stop portion 7 at the end of the guide block 5 stops and limits one end of the elastic member 3 to prevent the elastic member 3 from slipping out of the guide member 4. Furthermore, under conditions such as severe vibration of the vehicle body, the rolling member 2 may deflect while changing position between the two stops 1. In this case, the guide block 5 may also deflect due to the influence of the rolling member 2. Since the elastic member 3 is sleeved on the outer periphery of the guide rod 6, the elastic member 3 will not deflect during the deflection of the guide rod 6.

[0029] The other end of the guide rod 6 is connected to a cone 8, with the smaller end of the cone 8 facing away from the guide block 5. By setting the cone 8, during the expansion and contraction of the elastic element 3, part of the elastic element 3 can smoothly fit into or slide out of the guide rod 6, avoiding jamming between the elastic element 3 and the guide rod 6.

[0030] The guide block 5 has an arc-shaped surface 9 on the side facing the rolling element 2, which fits against the outer peripheral surface of the rolling element 2. The arc-shaped surface 9 and the outer peripheral surface of the rolling element 2 maintain surface contact during operation, increasing the contact area and improving force transmission efficiency. When the rolling element 2 changes position between the two stops 1, the guide block 5 can slide relative to the rolling element 2 through the arc-shaped surface 9, automatically adapting to the working state of the rolling element 2. This not only ensures that the contact remains intact but also prevents jamming between the rolling element 2 and the guide block 5.

[0031] The guide block 5 and the guide rod 6 are integrally formed. This facilitates the overall machining of the guide component 4 and avoids relative displacement or deformation between the guide block 5 and the guide rod 6.

[0032] The guide block 5 has arc-shaped chamfers 10 on both sides of its end face facing the guide rod 6. When the rolling element 2 (which will drive the guide block 5) changes position between the two stops 1, it avoids the guide block 5 from rubbing against the outer peripheral surface of the outer curved core wheel 12 and the inner peripheral surface of the bushing 13, thus protecting the guide block 5, the outer curved core wheel 12, and the bushing 13.

[0033] A limiting strip 11 is provided on the side of the stop surface 14 away from the outer curved core wheel 12. The limiting strip 11 intersects with the stop surface 14 and extends towards the side of the elastic member 3. By setting the limiting strip 11, the elastic member 3 is limited to prevent the end of the elastic member 3 from sliding out of the stop surface 14.

[0034] This embodiment has the following advantages: It uses a guide member 4 instead of the existing "cylinder and short rod," allowing the elastic member 3 to extend and retract flexibly. The arc-shaped surface 9 of the guide block 5 contacts the arc-shaped surface 9 of the rolling member 2, reducing contact stress and relative friction, and preventing the mechanism from jamming. The guide rod 6 guides the elastic member 3 axially along the outer curved core wheel 12, and the stop part 7 limits the end of the elastic member 3. A tapered body 8 is provided to facilitate the extension and retraction of the elastic member 3 relative to the guide rod 6 without jamming. This prevents the elastic member 3 from twisting, slipping, or axially jumping, ensuring the stability of the elastic force direction.

Claims

1. A one-way clutch pulley sleeve mechanism, comprising an outer curved core wheel and a bushing sleeve fitted around the outer circumference of the outer curved core wheel, wherein the outer wall of the outer curved core wheel is provided with several sets of circumferentially spaced and protruding blocks, and a spring roller assembly is provided between each pair of adjacent blocks, the spring roller assembly comprising a rolling element and a retractable elastic element, one side of the block intersects with the outer circumferential surface of the outer curved core wheel by a stop surface, and the other side of the block is provided with an arc-shaped groove between itself and the outer curved core wheel, the rolling element being movably disposed within the arc-shaped groove, characterized in that: The spring roller assembly also includes a guide member distributed between the rolling element and the elastic element. One end of the guide member presses against the outer peripheral surface of the rolling element, one end of the elastic element is sleeved on the other end of the guide member, and the other end of the elastic element presses against the stop surface on one side of the stop block.

2. The one-way clutch pulley sleeve mechanism according to claim 1, characterized in that: The guide member includes a guide block and a guide rod. One side of the guide block presses against the rolling element. One end of the guide rod is linked with the other side of the guide block. The end of the guide block extends towards the distance and forms a stop. One end of the elastic element is sleeved on the guide rod and presses against the stop.

3. The one-way clutch pulley sleeve mechanism according to claim 2, characterized in that: The other end of the guide rod is connected to a cone, with the small end of the cone facing away from the guide block.

4. The one-way clutch pulley sleeve mechanism according to claim 2, characterized in that: The guide block has an arc-shaped surface on the side facing the rolling element that fits against the outer peripheral surface of the rolling element.

5. The one-way clutch pulley sleeve mechanism according to claim 2, characterized in that: The guide block and guide rod are integrally formed.

6. The one-way clutch pulley sleeve mechanism according to claim 2, characterized in that: The guide block has arc-shaped chamfers on both sides of its end face facing the guide rod.

7. The one-way clutch pulley sleeve mechanism according to any one of claims 1 to 6, characterized in that: A limiting strip is provided on the side of the stop surface away from the outer curved core wheel. The limiting strip intersects with the stop surface and extends toward the side of the elastic member.

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