Bidirectional vibration reduction one-way belt pulley of rubber structure

Abstract

The utility model relates to the field of belt pulleys, in particular to a two-way vibration reduction one-way belt pulley of a rubber structure. The problems that in the process from deceleration to acceleration of an engine, a belt bears tensile force in the transmission process, a belt pulley instantly accelerates in the torque transmission process, the other position of the belt is stressed again, and due to the instant change of the tensile force of the belt, torque transmission at all positions of the whole transmission device is unstable, and the transmission efficiency is poor are solved. And the vibration generated by the parts of the whole transmission device can cause the loss of the device. A mandrel is arranged in the center of the belt pulley, the belt pulley comprises an outer ring and an inner ring, and the mandrel is connected with the inner ring of the belt pulley in an interference fit mode. The belt pulley is gradually accelerated in the torque transmission process through vibration reduction of the rubber ring, the tension force change of the belt can be reduced, the torque is stably transmitted, the rubber ring can also conduct vibration reduction in the torque transmission process, and the bidirectional vibration reduction effect is achieved.

Description

Technical Field

[0001] The utility model relates to the field of pulleys, in particular to a two-way vibration-damping one-way pulley with a rubber structure. Background Art

[0002] The increasing trend of automobile power consumption is increasing, requiring generators with higher inertia torque. The existing demand for small-displacement and high-power automobiles will increase the speed instability of the engine due to the increase in engine explosive power;

[0003] A generator with a higher inertia torque will increase the rotational inertia of the rotor. Due to the rotational inertia of the generator rotor, the traditional generator pulley and the rotor are connected as one, and they run synchronously. When the car accelerates and decelerates, the rotational inertia of the generator rotor directly acts on the belt, and the belt tension will change. This instantaneous change value cannot be effectively adjusted by the belt tensioner, and the vibration and noise of the belt will increase accordingly.

[0004] After checking, the publication (announcement) number: CN207213090U discloses a one-way clutch. This technology discloses "a one-way clutch, comprising a clutch ring, a rolling bearing is respectively arranged at both ends of the inner hole of the clutch ring, a core shaft is supported and installed on the two rolling bearings, a transfer ring, a retaining ring and a friction spring are arranged between the clutch ring and the core shaft, one end face of the transfer ring is tightly attached to the inner ring end face of one of the rolling bearings, and the other end face of the transfer ring is tightly attached to the inner ring end face of the other rolling bearing, etc.; the utility model provides a one-way clutch, when the rotation speed of the clutch ring is higher than the rotation speed of the generator drive shaft, the outer circle of the friction spring expands and clamps the inner hole of the clutch ring, the generator drive shaft and the clutch ring are combined into one, so that the generator drive shaft and the clutch ring rotate synchronously and transmit driving power; when the rotation speed of the clutch ring is lower than the rotation speed of the generator drive shaft, the outer circle of the friction spring shrinks and disengages from the inner hole of the clutch ring, the generator drive shaft and the clutch ring rotate separately, thereby playing a protective and buffering role, etc. Technical effects";

[0005] Although this design protects and buffers the generator drive shaft and clutch ring when they rotate separately, the belt will be subjected to tension during the transmission process when the engine decelerates and accelerates, and the pulley will accelerate instantly during the process of transmitting torque, so that another position of the belt is stressed again. Due to the instantaneous change in the belt tension, the torque transmission of various parts of the overall transmission device will be unstable, causing the overall transmission device components to vibrate, and the vibration generated by the components will cause device losses. Utility Model Content

[0006] (1) Technical issues to be resolved

[0007] In order to further overcome the process of the engine going from deceleration to acceleration, the belt will be subjected to tension during the transmission process, and the pulley will instantly accelerate during the process of transmitting torque, so that another position of the belt will be subjected to force again. Due to the instantaneous change in the belt tension, the torque transmission of the entire transmission device will be unstable, causing the components of the entire transmission device to vibrate, and the vibration generated by the components will cause the problem of device loss.

[0008] (2) Technical solution

[0009] The technical solution of the utility model is: a two-way vibration-damping one-way pulley with a rubber structure, a core shaft is arranged at the center of the pulley, the pulley includes an outer ring and an inner ring, the core shaft is connected with the inner ring of the pulley by interference fit, and also includes:

[0010] A rubber ring, wherein the rubber ring is connected to the outer wall of the inner ring of the pulley by interference fit. The rubber ring is an elastic body and plays a role of vibration reduction in the process of transmitting torque. If the pulley is accelerated instantly in the process of transmitting torque, the pulley is gradually accelerated in the process of transmitting torque through the vibration reduction of the rubber ring, which can reduce the change of the tension of the belt and ensure the stable transmission of torque. The rubber ring can also reduce vibration in the process of torque disengagement;

[0011] Bearings, there are two groups of bearings, the two groups of bearings are respectively arranged at both ends of the inner ring shaft hole of the pulley, the outer ring of the bearing is connected to the inner wall of the outer ring of the pulley by interference fit, and the mandrel is connected to the inner wall of the inner ring of the bearing by interference fit;

[0012] A retainer, wherein the retainer is disposed between the two groups of bearings, and the inner wall of the retainer is connected with the outer wall of the rubber ring by interference fit;

[0013] A friction spring is provided between the outer ring of the pulley and the retaining frame.

[0014] As a preferred bidirectional vibration-damping one-way pulley with a rubber structure of the utility model, a gasket is arranged between the retaining frame and the bearing, and the gasket is used to maintain the axial position of the friction spring.

[0015] As a preferred bidirectional vibration-damping one-way pulley with a rubber structure of the utility model, a spring groove matched with the spring head of the friction spring is opened at the end of the retaining frame, and the spring head of the friction spring is installed inside the spring groove.

[0016] (3) Beneficial effects

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. This design integrates the cage, rubber ring and mandrel into one, so that the transmission efficiency of the equipment is stable during the transmission process;

[0019] 2. The rubber ring is an elastic body that plays a role in vibration reduction during the torque transmission process. If the pulley accelerates instantly during the torque transmission process, the pulley can be gradually accelerated by the rubber ring to reduce the tension change of the belt and ensure stable torque transmission. The rubber ring can also reduce vibration during the torque transmission process, playing a role of bidirectional shock absorption.

[0020] 3. The utility model reduces the interference of the generator to the belt drive system;

[0021] 4. The utility model can reduce the reverse rotation difference and prevent the reverse current from damaging the automobile generator;

[0022] 5. The utility model reduces the tension vibration and noise of the belt during operation;

[0023] 6. The utility model increases the service life of the generator system and belt;

[0024] 7. The utility model reduces the reaction force on the engine, makes the engine run smoothly and reduces fuel consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 What is shown is a schematic diagram of the cross-sectional structure of the utility model;

[0026] Figure 2 What is shown is a schematic diagram of the split structure of the utility model;

[0027] Figure 3 The schematic diagram of the planar structure of the friction spring of the retainer set of the utility model is shown;

[0028] Figure 4 The plan view of the structure of the cage and its connecting parts of the utility model is shown;

[0029] Figure 5 What is shown is a schematic diagram of the planar structure of the retainer in the utility model;

[0030] Figure 6 What is shown is a schematic diagram of the planar structure of the friction spring in the utility model.

[0031] Explanation of the reference numerals: 1. outer ring; 2. bearing; 3. retaining frame; 4. friction spring; 5. rubber ring; 6. inner ring; 7. core shaft; 8. gasket; 9. spring groove. DETAILED DESCRIPTION

[0032] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0033] Example 1: Please refer to Figure 1-6The utility model provides an embodiment: a core shaft 7 is arranged at the center of the pulley, the pulley includes an outer ring 1 and an inner ring 6, the core shaft 7 is connected with the inner ring 6 of the pulley by interference fit, and also includes:

[0034] A rubber ring 5 is connected to the outer wall of the inner ring 6 of the pulley by interference fit;

[0035] Bearing 2, there are two groups of bearings 2, the two groups of bearings 2 are respectively arranged at both ends of the shaft hole of the inner ring 6 of the pulley, the bearing 2 is connected to the inner wall of the outer ring 1 of the pulley by interference fit, and the core shaft 7 is connected to the inner wall of the inner ring of the bearing 2 by interference fit;

[0036] The retainer 3, the inner wall of the retainer 3 is connected with the outer wall of the rubber ring 5 by interference fit, and the rubber ring 5, the retainer 3 and the inner ring 6 of the pulley are connected as one by interference fit;

[0037] A friction spring 4, wherein the friction spring 4 is arranged between the outer ring 1 of the pulley and the retaining frame 3;

[0038] Due to the existence of the rotational inertia of the generator rotor, the traditional generator pulley and rotor are connected as one, and they run synchronously. When the car accelerates and decelerates, the rotational inertia of the generator rotor directly acts on the belt, and the belt tensioning force will change. This instantaneous change value cannot be effectively adjusted by the belt tensioner. At this time, the vibration and noise of the belt will increase accordingly.

[0039] The rubber ring 5 is an elastomer and plays a vibration reduction role in the process of transmitting torque. If the pulley will accelerate instantly in the process of transmitting torque, the pulley will gradually accelerate in the process of transmitting torque through the vibration reduction of the rubber ring 5, which can reduce the change of the belt tension and ensure stable transmission of torque. When the rubber ring 5 is disengaged from the torque, the engine shaft transfers the torque to the inner ring 6, the inner ring 6 of the pulley transfers the torque to the rubber ring 5, and the rubber ring 5 transfers the torque to the retaining frame 3 for vibration reduction. The rubber ring 5 plays a bidirectional vibration reduction role.

[0040] The center size of the inner ring 6 has different specifications and can be selected according to the model of the mandrel 7. The inner ring 6 is connected with the mandrel 7 by interference fit, so that the mandrel 7 and the inner ring 6 form a whole, and the rubber ring 5 is used to achieve the function of bidirectional vibration reduction;

[0041] A gasket 8 is provided between the retaining frame 3 and the bearing 2 , and the gasket 8 is used to maintain the axial position of the friction spring 4 .

[0042] A spring groove 9 adapted to the spring head of the friction spring 4 is provided at the end of the retaining frame 3 , and the spring head of the friction spring 4 is installed inside the spring groove 9 .

[0043] Working principle:

[0044] Torque transmission process:

[0045] 1. The engine transfers kinetic energy to the outer ring 1 of the pulley through the belt;

[0046] 2. The outer ring 1 of the pulley transmits torque to the friction spring 4 (because the inner hole of the outer ring 1 of the pulley gives friction to the friction spring 4, the friction spring 4 is in an outward expansion state);

[0047] 3. The friction spring 4 transmits the torque to the cage 3 through the spring groove of the cage 3;

[0048] 4. The cage 3 transmits the torque to the rubber ring 5 (the rubber ring 5, the cage 3 and the inner ring 6 of the pulley are connected as one by interference fit);

[0049] 5. The rubber ring 5 transmits the torque to the inner ring 6 of the pulley (the rubber ring 5 is an elastic body and plays a vibration reduction role in the process of transmitting torque);

[0050] 6. The inner ring 6 of the pulley is interference fit with the mandrel 7 to transmit the torque to the mandrel 7;

[0051] 7, the core shaft 7 is connected by threads to transmit the torque to the shaft of the generator, driving the generator shaft to rotate and generate electricity.

[0052] Torque disengagement process:

[0053] 1. The outer ring 1 of the pulley has a rotation speed lower than the engine speed;

[0054] 2. The generator shaft transmits the torque to the inner ring of the pulley 6;

[0055] 3. The inner ring 6 of the pulley transmits the torque to the rubber ring 5;

[0056] 4. The rubber ring 5 transmits the torque to the cage 3;

[0057] 5. The retainer 3 transmits the torque to the friction spring 4 through the spring groove;

[0058] 6. Since the friction spring 4 is in a spiral direction, its outer diameter is contracted at this time and is separated from the inner hole of the outer ring 1 of the pulley.

[0059] Through the above steps, the present design integrates the retaining frame 3, rubber ring 5 and core shaft 7 to ensure stable transmission efficiency of the equipment during the transmission process. The rubber ring 5 is an elastomer and plays a vibration reduction role in the process of transmitting torque. If the pulley is instantly accelerated during the process of transmitting torque, the pulley is gradually accelerated during the process of transmitting torque through the vibration reduction of the rubber ring 5, which can reduce the change of belt tension and ensure stable torque transmission. During the process of torque disengagement of the rubber ring 5, the engine shaft transmits the torque to the inner ring 6, the inner ring 6 of the pulley transmits the torque to the rubber ring 5, and the rubber ring 5 transmits the torque to the retaining frame 3 for vibration reduction. The rubber ring 5 plays a role of bidirectional vibration reduction.

[0060] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A two-way vibration-damping one-way pulley with a rubber structure, characterized in that: A core shaft (7) is arranged at the center of the pulley, the pulley comprises an outer ring (1) and an inner ring (6), the core shaft (7) is connected to the inner ring (6) of the pulley by interference fit, and further comprises: A rubber ring (5), the rubber ring (5) being connected to the outer wall of the inner ring (6) of the pulley by interference fit; Bearings (2), there are two groups of bearings (2), the two groups of bearings (2) are respectively arranged at two ends of the shaft hole of the inner ring (6) of the pulley, the outer ring of the bearing (2) is connected to the inner wall of the outer ring (1) of the pulley by interference fit, and the core shaft (7) is connected to the inner wall of the inner ring of the bearing (2) by interference fit; A retainer (3), the retainer (3) being arranged between the two groups of bearings (2), the inner wall of the retainer (3) being connected to the outer wall of the rubber ring (5) by interference fit; A friction spring (4), wherein the friction spring (4) is arranged between the outer ring (1) of the pulley and the retaining frame (3).

2. The bidirectional vibration-damping one-way pulley with a rubber structure according to claim 1, characterized in that: A gasket (8) is provided between the retaining frame (3) and the bearing (2), and the gasket (8) is used to maintain the axial position of the friction spring (4).

3. The bidirectional vibration-damping one-way pulley with a rubber structure according to claim 1, characterized in that: A spring groove (9) adapted to the spring head of the friction spring (4) is provided at the end of the retaining frame (3).

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