Generator one-way coupling shock absorber suitable for high-torque impact

Abstract

The utility model provides a generator one-way coupling shock absorber suitable for high torque impact, which comprises a pivot, a belt wheel, a vibration isolation spring, an adaptive metal block and a plastic retainer, the pivot is coaxially arranged in the belt wheel, a bearing is arranged at one end of the pivot and rotatably supported between the pivot and the belt wheel, and the plastic retainer is arranged on the bearing. The plastic retainer is arranged on the inner side of the bearing, the outer ring of the plastic retainer is in interference fit with the inner wall of the belt wheel, a spigot is formed in the end face of the side, opposite to the bearing, of the plastic retainer, the adaptive metal block is arranged at the end of the spigot, the pivot is sleeved with the vibration isolation spring, and the end of the vibration isolation spring abuts against the adaptive metal block. According to the structure, an adaptive metal block structure is additionally arranged between the contact surfaces of the vibration isolation spring and the plastic retainer, so that the stress concentration condition borne by the retainer surface of the plastic clutch is reduced, the impact resistance of the retainer is improved, the service life of the damping belt wheel is prolonged, and the failure of the damping belt wheel is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration dampers, in particular to a one-way coupled vibration damper for generators suitable for large moment impacts. Background Art

[0002] Currently, most generator damping pulleys on the market utilize a plastic clutch retainer to secure the clutch spring, with the plastic clutch retainer directly bearing the torque transmitted by the vibration isolation spring. However, as end-user demands for vehicle functionality increase, the number of electrical devices used in vehicles increases, and the load on the generator increases as well. This ultimately leads to increasing engine power and torque, as well as the output torque of the generator.

[0003] The existing generator vibration damping pulley design is that the end face of the vibration isolation spring directly contacts the end face of the plastic clutch holder, and the plastic clutch holder mainly bears the torque applied by the vibration isolation spring. Due to the limitations of the internal space of the vibration damping pulley and the spring design, as well as the limitations of the spring processing technology (that is, when the spring rate is constant, the number of spring coils and the cross-section are basically fixed), the end face of the vibration isolation spring 4 is generally smaller than the end face of the stop 81 of the plastic holder 8. Under certain special working conditions, the vibration damping pulley is subjected to excessive impact, such as Figure 1 As shown, the contact surface between the clutch's plastic retainer and the vibration isolation spring is subjected to greater stress, resulting in plastic deformation and the appearance of pits 100 on the end face of the clutch's plastic retainer, which further causes the vibration isolation spring to directly contact the clutch spring, breaking the fit between the clutch spring and the plastic retainer, and causing cracks and breakage on the clutch spring and the plastic retainer, ultimately causing the shock absorber pulley to fail, greatly reducing its service life. Utility Model Content

[0004] The technical problem to be solved by the present invention is: in order to overcome the deficiencies in the prior art, the present invention provides a one-way coupled vibration damper for a generator suitable for large torque impacts, and adds an adaptor metal block structure between the contact surface of the vibration isolation spring and the plastic retainer to reduce the stress concentration on the surface of the plastic clutch retainer, thereby improving the impact resistance of the retainer and the service life of the shock-absorbing pulley, and reducing the failure of the shock-absorbing pulley.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a one-way coupled vibration absorber for a generator suitable for large torque impact, comprising a pivot, a pulley, a vibration isolation spring, an adaptive metal block and a plastic retaining frame, wherein the pivot is coaxially arranged inside the center hole of the pulley, the bearing is arranged at one end of the pivot, and is rotatably supported between the pivot and the pulley, the inner ring of the bearing is interference-connected with the pivot, and the outer ring is interference-connected with the inner wall of the pulley to realize relative rotation and support between the pivot and the pulley, the plastic retaining frame is arranged on the inner side of the bearing, and the outer ring of the plastic retaining frame is interference-fitted with the inner wall of the pulley, and a stop is provided on the end face of the plastic retaining frame facing away from the bearing, the adaptive metal block is arranged at the end of the stop, the vibration isolation spring is sleeved on the pivot, and the end of the vibration isolation spring is against the adaptive metal block, the other end of the vibration isolation spring is connected to the other end of the pivot, and the vibration isolation spring plays a vibration isolation role between the pivot and the pulley.

[0006] Furthermore, in order to ensure the direction of assembly, the adapting metal block is also provided with an anti-fool surface, which is arranged above the first contact surface and transitionally connected to the first contact surface.

[0007] Furthermore, transition arc surfaces are provided at the connecting corners of different surfaces of the adapting metal block.

[0008] Furthermore, a groove for positioning the adapting metal block is provided on the plastic retainer below the stop. During assembly, the bottom of the adapting metal block is embedded in the groove, and its second contact surface is close to the stop, thereby positioning and limiting the adapting metal block.

[0009] Furthermore, it also includes a clutch spring and a protective cover, the protective cover is arranged on the outside of the vibration isolation spring, and a notch is provided on the side wall of the protective cover in the axial direction, the clutch spring is arranged on the protective cover, and one end of the clutch spring is connected to the plastic retaining frame, and the other end is connected to the protective cover. When the clutch spring expands outward under the torsion, friction is generated with the inner wall of the pulley, driving the pulley to rotate synchronously. When the torsion on the clutch spring disappears, the clutch spring contracts inward and separates from the inner wall of the pulley, thereby disconnecting the torque transmission between the pulley and the pivot.

[0010] Furthermore, in order to release the stress generated on the protective sleeve, a plurality of U-shaped openings are provided along the circumferential direction at one end of the protective sleeve facing the plastic retaining frame.

[0011] Furthermore, a metal gasket is included, and the metal gasket is arranged between the bearing and the plastic retaining frame.

[0012] Furthermore, in order to protect the transmission components inside the pulley, a dust cover is also included, and the dust cover is arranged at the end of the pulley away from the bearing.

[0013] The beneficial effects of this utility model include: A one-way coupled generator vibration damper suitable for high-torque impacts employs an adaptable metal block as a bridge connecting the vibration isolation spring and the plastic clutch retainer. The end faces of the adaptable metal block can be adjusted to the dimensions of the isolation spring and plastic clutch retainer ends, minimizing stress on the retainer end faces and thereby providing greater impact resistance and durability. Furthermore, the metal block offers increased strength, a simple structure, and ease of processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 It is a structural schematic diagram of a generator vibration damping pulley failure in the prior art.

[0016] Figure 2 Figure (a) shows the contact area (shaded portion) between the end face of the vibration isolation spring and the plastic retainer of the clutch in the prior art.

[0017] Figure 2 Figure (b) shows the contact area (shaded portion) between the end face of the vibration isolation spring of the present invention and the plastic retainer of the clutch.

[0018] Figure 3 It is a schematic diagram of the explosion structure of the one-way coupled vibration absorber of the generator of the utility model.

[0019] Figure 4 It is a schematic cross-sectional structure diagram of a one-way coupled vibration absorber for a generator according to the present invention.

[0020] Figure 5 It is a structural diagram of the adapter metal block, vibration isolation spring, and plastic retainer.

[0021] Figure 6 It is a structural diagram of the adapter metal block.

[0022] Figure 7 It is a connection diagram of the adapter metal block and the vibration isolation spring.

[0023] Figure 8 It is a schematic diagram of the connection between the adapter metal block and the plastic retainer.

[0024] Figure 9 It is a structural diagram of a plastic cage.

[0025] Figure 10 It is a structural diagram of the protective cover.

[0026] In the figure: 100, pit, 1, dust cover, 2, pivot, 3, bushing, 4, vibration isolation spring, 5, protective cover, 51, notch, 52, U-shaped opening, 6, clutch spring, 7, adapter metal block, 71, first contact surface, 72, second contact surface, 73, anti-misalignment surface, 74, transition arc surface, 8, plastic retainer, 81, stop, 82, groove, 83, clutch spring positioning groove, 9, metal gasket, 10, pulley, 11, bearing. DETAILED DESCRIPTION

[0027] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating the basic structure of the present invention only in a schematic manner. They therefore only show components relevant to the present invention, and directions and references (e.g., up, down, left, right, etc.) are intended solely to facilitate the description of features in the drawings. The following detailed description is therefore not to be taken in a limiting sense, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0028] like Figure 3-Figure 5 As shown, the utility model is a one-way coupled vibration absorber for a generator suitable for large torque impact, comprising a pivot 2, a pulley 10, a vibration isolation spring 4, an adaptor metal block 7, a plastic retainer 8, a clutch spring 6, a protective cover 5, a bushing 3, a metal gasket 9 and a dust cover 1, wherein the pivot 2 is coaxially arranged inside the center hole of the pulley 10, the bearing 11 is arranged at one end of the pivot 2, and is rotatably supported between the pivot 2 and the pulley 10, the inner ring of the bearing 11 is interference-connected with the pivot 2, and the outer ring is interference-connected with the inner part of the pulley 10, so as to realize relative rotation and support between the pivot 2 and the pulley 10. The plastic retainer 8 is arranged on the inner side of the bearing 11, and the metal gasket 9 is arranged between the bearing 11 and the plastic retainer 8; and the outer ring of the plastic retainer 8 is interference fit with the inner wall of the pulley 10, and the end face of the plastic retainer 8 facing away from the bearing 11 is provided with a stop 81, and the adapting metal block 7 is arranged at the end of the stop 81. The vibration isolation spring 4 is sleeved on the pivot 2, and the end of the vibration isolation spring 4 is against the adapting metal block 7, and the other end of the vibration isolation spring 4 is connected to the other end of the pivot 2. The vibration isolation spring 4 plays a vibration isolation role between the pivot 2 and the pulley 10. In order to protect the transmission components inside the pulley 10, a dust cover 1 is also included. The dust cover 1 is arranged at the end of the pulley 10 away from the bearing 11.

[0029] like Figure 6-Figure 8As shown, the adapting metal block 7 has first and second contact surfaces 71 and 72 on opposite sides. The first contact surface 71 serves as the contact surface between the adapting metal block 7 and the end of the vibration isolation spring 4, while the second contact surface 72 serves as the contact surface between the adapting metal block 7 and the plastic retainer 8. To ensure proper assembly orientation, the adapting metal block 7 is also provided with a foolproof surface 73, which is positioned above the first contact surface 71 and transitionally connected to it. Transition arc surfaces 74 are provided at the corners where different surfaces of the adapting metal block 7 meet.

[0030] like Figure 9 As shown, the plastic retainer 8 below the stop 81 is provided with a groove 82 for positioning the adapting metal block 7. During assembly, the bottom of the adapting metal block 7 is embedded in the groove 82, and its second contact surface 72 abuts against the stop 81, thereby positioning and limiting the adapting metal block 7. The plastic retainer 8 is also provided with a clutch spring positioning groove 83 for securing the end of the clutch spring 6. During installation, the end of the clutch spring 6 is clamped in the clutch spring positioning groove 83 and then coiled around the raised ring 84 of the plastic retainer 8 in the direction of rotation.

[0031] like Figure 10 As shown, the protective sleeve 5 is sleeved on the outside of the vibration isolation spring 4 and is located between the vibration isolation spring 4 and the clutch spring 6 to separate the two. A notch 51 is provided axially on the side wall of the protective sleeve 5. The clutch spring 6 is sleeved on the protective sleeve 5, and one end of the clutch spring 6 is connected to the plastic retainer 8, and the other end is connected to the protective sleeve 5. When the clutch spring 6 is subjected to torsion and expands outward, friction is generated with the inner wall of the pulley 10, driving the pulley 10 to rotate synchronously. When the torsion on the clutch spring 6 disappears, the clutch spring 6 contracts inward and separates from the inner wall of the pulley 10, thereby disconnecting the torque transmission between the pulley 10 and the pivot 2. In order to release the stress generated on the protective sleeve 5, the protective sleeve 5 is further provided with a plurality of U-shaped openings 52 along the circumferential direction on one end facing the plastic retainer 8. A bushing 3 is added to the end of the clutch spring 6 to protect it.

[0032] like Figure 2 Figure (a) shows the contact area (shaded part) between the end face of the vibration isolation spring 4 and the plastic retainer 8 of the clutch in the prior art, and Figure (b) shows the contact area (shaded part) between the end face of the vibration isolation spring 4 and the plastic retainer 8 of the clutch in this embodiment. From the comparison of the two figures, it can be seen that in this embodiment, the adaptive metal block 7 is added as a connecting bridge to increase the force-bearing area of ​​the retainer, reduce the plastic deformation of the end face of the plastic retainer 8, avoid the impact on the clutch spring 6, and thus avoid the failure of the clutch spring 6.

[0033] Working principle:

[0034] This generator's one-way coupled vibration damper is sequentially arranged, from outside to inside, with a bearing 11, a pulley 10, a clutch spring 6, a vibration isolation spring 4, and a pivot 2. The bearing 11 is positioned on one side of the pulley 10 and rotates synchronously with it. The pivot 2 is fitted with a vibration isolation spring 4, which is then fitted with a clutch spring 6. The clutch spring 6 is coupled to the axis on the other side of the pulley 10 and transmits torque to the pivot 2. A metal gasket 9, a plastic retainer 8, and a clutch spring 6 are positioned, from outside to inside, between the bearing 11 and the vibration isolation spring 4. The clutch spring 6 is embedded in the plastic clutch retainer. The vibration isolation spring 4 and the plastic retainer 8 are connected by an adaptor metal block 7. The adaptor metal block 7 is positioned in a groove 82 of the plastic retainer 8. The second contact surface 72 of the adaptor metal block 7 is connected to the end surface of the plastic retainer 8, and the first contact surface 71 of the adaptor metal block 7 is connected to the end surface of the vibration isolation spring 4. The adaptor metal block 7 cooperates with the vibration isolation spring 4 and the plastic retainer 8 to transmit torque.

[0035] When the pulley 10 is subjected to a large impact, the torsion is transmitted to the plastic retainer 8 through the vibration isolation spring 4 and the adapter metal block 7. The force-bearing area of ​​the plastic retainer 8 is the area of ​​the second contact surface 72, which is much larger than the area of ​​the end of the vibration isolation spring 4, thereby reducing the force per unit area, avoiding plastic deformation or pits in the plastic retainer 8, avoiding breakage of the clutch spring 6 and the plastic clutch retainer, and ensuring the shock absorption effect of the pulley 10.

[0036] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the scope of the present invention. The technical scope of this utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A one-way coupled vibration absorber for a generator suitable for large moment impact, characterized by: It includes a pivot, a pulley, a bearing, a vibration isolation spring, an adapter metal block and a plastic retainer, wherein the pivot is coaxially arranged inside the center hole of the pulley, the bearing is arranged at one end of the pivot and is rotatably supported between the pivot and the pulley, the plastic retainer is arranged on the inner side of the bearing, and the outer ring of the plastic retainer is interference fit with the inner wall of the pulley, and a stop is provided on the end face of the plastic retainer facing away from the bearing, the adapter metal block is arranged at the end of the stop, the vibration isolation spring is sleeved on the pivot, and the end of the vibration isolation spring is against the adapter metal block, and the other end of the vibration isolation spring is connected to the other end of the pivot.

2. The one-way coupled vibration absorber for generators suitable for large torque impact according to claim 1, characterized in that: The adapting metal block is further provided with an anti-fouling surface, which is arranged above the first contact surface and transitionally connected to the first contact surface.

3. The one-way coupled vibration absorber for generators suitable for large torque impact according to claim 1, characterized in that: The connecting corners of different surfaces of the adapting metal block are all provided with transition arc surfaces.

4. The one-way coupled vibration absorber for generators suitable for large torque impact according to claim 1, characterized in that: A groove for adapting the positioning of the metal block is provided on the plastic retaining frame below the stop.

5. The one-way coupled vibration absorber for generators suitable for large torque impact according to any one of claims 1 to 4, characterized in that: It also includes a clutch spring and a protective cover, wherein the protective cover is arranged on the outside of the vibration isolation spring, and a notch is provided on the side wall of the protective cover along the axial direction. The clutch spring is arranged on the protective cover, and one end of the clutch spring is connected to the plastic retaining frame, and the other end is connected to the protective cover.

6. The one-way coupled vibration absorber for generators suitable for large torque impact according to claim 5, characterized in that: The end of the protective sleeve facing the plastic retainer is further provided with a plurality of U-shaped openings along the circumferential direction.

7. The one-way coupled vibration absorber for generators suitable for large torque impact according to claim 5, characterized in that: The invention also comprises a metal washer, which is arranged between the bearing and the plastic cage.

8. The one-way coupled vibration absorber for generators suitable for large torque impact according to claim 5, characterized in that: The utility model further comprises a dust cover which is arranged at an end portion of the pulley away from one end of the bearing.

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