Vibration reduction gear and power system with same

Abstract

The utility model discloses a vibration reduction gear and a power system with the vibration reduction gear. The vibration reduction gear comprises a hub, a transmission shaft and a transmission shaft, the gear ring is arranged on the radial outer side of the hub in a sleeving mode, a limiting boss is formed in one of the hub and the gear ring, a groove is formed in the other one of the hub and the gear ring, and the limiting boss is arranged in the groove in a matched mode; and the vibration reduction piece extends in the circumferential direction of the hub to form a ring shape, the vibration reduction piece is arranged between the hub and the gear ring in a sleeving mode, the vibration reduction piece comprises a first vibration reduction part, and at least part of the first vibration reduction part is connected between the inner wall of the groove and the outer circumferential face of the limiting boss. According to the vibration reduction gear, vibration impact can be effectively absorbed, the vibration reduction performance is further improved, noise is reduced, the service life of the vibration reduction gear is greatly prolonged, the vibration reduction gear can bear external force in the axial direction of the gear, the reliability of the vibration reduction gear during stress is improved, and therefore the vibration reduction gear can be arranged to be a straight gear or a straight gear. And a bevel gear can be arranged, so that the application range of the vibration reduction gear is expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of gears, in particular to a vibration-damping gear and a power system having the same. Background Art

[0002] Gears are an important part of mechanical transmission devices and are widely used in many industries. Vibration-reducing gears are gears with vibration-reducing functions. They are commonly found in precision transmission devices and are widely used in automobile engine balance shafts and gearbox transmissions. Vibration-reducing gears can reduce the vibration and noise caused by external forces on the running gears.

[0003] At present, the commonly used vibration-reducing gear adopts the method of adding a ring-shaped rubber layer in the middle of the gear to achieve the function of vibration reduction and noise reduction. Since the gear is rigid, the deformation of the rubber is small, and the vibration absorption capacity of the rubber is limited, the improvement of vibration and noise is limited. In addition, such gears can generally only be set as spur gears to reduce the vibration in the torsional direction, but cannot be set as helical gears, so the scope of application is limited. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a vibration-damping gear, which can further improve the vibration-damping performance, reduce noise, greatly increase the service life of the vibration-damping gear, and can also withstand external forces in the axial direction of the gear, so that the vibration-damping gear can be set as both a spur gear and a helical gear, thereby expanding the application range of the vibration-damping gear.

[0005] The utility model also provides a power system having the vibration-reducing gear.

[0006] According to the first aspect of the utility model, the vibration-damping gear comprises: a wheel hub; a gear ring, the gear ring is sleeved on the radial outer side of the wheel hub, one of the wheel hub and the gear ring forms a limiting boss and the other forms a groove, the limiting boss fits into the groove; a vibration-damping member, the vibration-damping member extends in a ring shape along the circumference of the wheel hub and is sleeved between the wheel hub and the gear ring, the vibration-damping member comprises a first vibration-damping portion, at least a portion of which is connected between the inner wall of the groove and the outer peripheral surface of the limiting boss.

[0007] According to the vibration-damping gear of the utility model, by respectively setting a limiting boss and a groove on the wheel hub and the gear ring, and forming a first vibration-damping part arranged on the inner wall of the groove and the circumferential surface of the limiting boss on the vibration-damping part, the vibration-damping part can effectively absorb vibration impact between the gear ring and the wheel hub, thereby further improving the vibration-damping performance, reducing noise, and greatly improving the service life of the vibration-damping gear. At the same time, the first vibration-damping part located in the groove can withstand external forces in the axial direction of the gear, increasing the reliability of the vibration-damping gear when subjected to force, so that the vibration-damping gear can be set not only as a spur gear, but also as a helical gear, thereby expanding the scope of application of the vibration-damping gear.

[0008] In some embodiments, the first vibration damping portion includes a first part and a second part, the first part is annular and is sleeved on the outer circumferential surface of the limiting boss, and the second part is connected to the first part and connected between the end surface of the limiting boss and the bottom wall of the groove.

[0009] In some embodiments, the spacing between the limiting boss and the bottom wall of the groove is a first spacing, and the spacing between the limiting boss and the peripheral wall of the groove is a second spacing, and both the first spacing and the second spacing are configured to be less than or equal to the deformation distance of the vibration damping member at a preset maximum load.

[0010] In some embodiments, the vibration damper also includes: a second vibration damper portion, the second vibration damper portion is connected to the first vibration damper portion, the second vibration damper portion extends along the circumference of the hub and is connected between the outer circumference of the hub and the inner circumference of the gear ring.

[0011] In some embodiments, a radially protruding mating boss is formed on the other of the hub and the ring gear, and the mating boss is annular and defines the groove on the inner side.

[0012] In some embodiments, a connecting hole is formed on the mating boss, and the connecting hole passes through the mating boss along the wall thickness direction of the mating boss. The vibration damper also includes: a connecting part, which is passed through the connecting hole and connected between the first vibration damping part and the second vibration damping part.

[0013] In some embodiments, the communicating hole is formed on two side walls of the mating boss that are opposite to each other in the circumferential direction of the wheel hub, and passes through the mating boss along the circumferential direction of the wheel hub.

[0014] In some embodiments, the limiting boss is formed on the inner wall surface of the gear ring and protrudes radially inwardly along the gear ring, the mating boss is formed on the outer peripheral surface of the wheel hub and protrudes radially outwardly along the wheel hub, and the end faces of the mating boss at both ends of the axial direction of the damping gear are respectively flush with the end faces of the wheel hub.

[0015] In some embodiments, there are multiple limiting bosses, and the multiple limiting bosses are evenly spaced around the circumference of the gear ring, and the number of the grooves corresponds one-to-one to the limiting bosses.

[0016] The power system according to the second aspect of the utility model comprises the damping gear according to the first aspect of the utility model.

[0017] According to the power system of the utility model, the overall performance of the power system is improved by providing the damping gear of the first aspect.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is an exploded view of a vibration-reducing gear according to an embodiment of the utility model;

[0020] Figure 2 is a cross-sectional view of a vibration reduction gear according to an embodiment of the utility model at one angle;

[0021] Figure 3 It is a cross-sectional view at another angle of the damping gear according to an embodiment of the utility model.

[0022] Reference numerals:

[0023] 100. Vibration reduction gear;

[0024] 1. hub; 11. mating boss; 110. groove; 111. connecting hole;

[0025] 2. Gear ring; 21. Limiting boss;

[0026] 3. Vibration damping member; 31. First vibration damping part; 32. Second vibration damping part; 33. Connecting part. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0028] Reference below Figure 1-Figure 3 A damping gear 100 according to an embodiment of the first aspect of the utility model is described.

[0029] like Figure 1-Figure 3As shown, the vibration-damping gear 100 according to the first embodiment of the utility model includes: a wheel hub 1, a gear ring 2 and a vibration-damping member 3.

[0030] The ring gear 2 is sleeved on the radial outer side of the wheel hub 1, and one of the wheel hub 1 and the ring gear 2 forms a limiting boss 21 and the other forms a groove 110, that is, when the limiting boss 21 is formed on the wheel hub 1, the groove 110 is formed on the ring gear 2, or when the limiting boss 21 is formed on the ring gear 2, the groove 110 is formed on the wheel hub 1, and the limiting boss 21 fits in the groove 110.

[0031] The vibration damper 3 extends in a ring shape along the circumference of the wheel hub 1 and is sleeved between the wheel hub 1 and the ring gear 2. The vibration damper 3 includes a first vibration damper portion 31. At least a portion of the first vibration damper portion 31 is connected between the inner wall of the groove 110 and the outer peripheral surface of the limiting boss 21. That is, a portion of the first vibration damper portion 31 is connected between the inner wall of the groove 110 and the outer peripheral surface of the limiting boss 21, or the entire first vibration damper portion 31 is connected between the inner wall of the groove 110 and the outer peripheral surface of the limiting boss 21.

[0032] For example, the wheel hub 1 is used to be fixedly connected with the gear shaft, the ring gear 2 of the damping gear 100 is sleeved on the outer side of the wheel hub 1 in the radial direction, the ring gear 2 is provided with a limiting boss 21, the wheel hub 1 is provided with a groove 110, the limiting boss 21 of the ring gear 2 is provided in the groove 110 of the wheel hub 1, and further, the projection shape of the limiting boss 21 in the axial direction of the damping gear 100 can be a fan ring. The vibration damping member 3 is arranged between the wheel hub 1 and the ring gear 2, and is extended and arranged along the circumference of the wheel hub 1. The vibration damping member 3 includes a first vibration damping portion 31, the first vibration damping portion 31 is used to connect the groove 110 and the limiting boss 21, and the entire first vibration damping portion 31 is arranged between the inner wall of the groove 110 and the outer peripheral surface of the limiting boss 21.

[0033] In this embodiment, when the vibration damping gear 100 rotates, the external force on the vibration damping gear 100 causes the hub 1 and the gear ring 2 of the vibration damping gear 100 to rotate relative to each other and move relative to each other in the radial direction. At this time, the vibration damping member 3 between the groove 110 and the limiting boss 21 can fully absorb the energy generated by the vibration of the vibration damping gear 100 through its own deformation, further improving the vibration reduction and noise reduction effects, and greatly improving the service life of the vibration damping gear 100. At the same time, the first vibration damping part 31 can cooperate with the groove 110 and the limiting boss 21 to jointly withstand the external force in the axial direction of the vibration damping gear 100, thereby increasing the reliability of the vibration damping gear 100 when subjected to force, so that the vibration damping gear 100 can be set not only as a spur gear, but also as a helical gear or a bevel gear, thereby expanding the scope of application of the vibration damping gear 100.

[0034] According to the vibration-damping gear 100 of the utility model, by respectively setting the limiting boss 21 and the groove 110 on the wheel hub 1 and the ring gear 2, and forming the first vibration-damping part 31 arranged on the inner wall of the groove 110 and the circumferential surface of the limiting boss 21 on the vibration-damping member 3, the vibration-damping member 3 can effectively absorb the vibration impact between the ring gear 2 and the wheel hub 1, thereby further improving the vibration-damping performance, reducing noise, and greatly improving the service life of the vibration-damping gear 100. At the same time, the first vibration-damping part 31 located in the groove 110 can withstand the external force in the axial direction of the gear, increasing the reliability of the vibration-damping gear 100 when subjected to force, so that the vibration-damping gear 100 can be set not only as a spur gear, but also as a helical gear, thereby expanding the scope of application of the vibration-damping gear 100.

[0035] Furthermore, the material of the vibration damping member 3 can be hydrogenated nitrile rubber, which has high strength, good tearing performance, and good heat resistance, chemical corrosion resistance and wear resistance.

[0036] In one embodiment of the present invention, Figure 3 As shown, the first vibration damping portion 31 includes a first part and a second part, the first part is annular and is sleeved on the outer circumferential surface of the limiting boss 21, and the second part is connected to the first part and connected between the end surface of the limiting boss 21 and the bottom wall of the groove 110.

[0037] For example, the cross section of the first part of the first vibration damping part 31 in the radial direction perpendicular to the wheel hub 1 is annular, and the first part extends outwardly along the radial direction of the wheel hub 1 to the top of the groove 110. The first part is located between the outer peripheral surface of the limiting boss 21 and the peripheral wall of the groove 110. Specifically, the outer peripheral surface of the first part is connected to the peripheral wall of the groove 110, and the inner peripheral surface of the first part is connected to the outer peripheral surface of the limiting boss 21. The second part of the first vibration damping part 31 is connected to the first part, and the second part is arranged between the end surface of the limiting boss 21 and the bottom wall of the groove 110. Specifically, one side of the second part is connected to the bottom wall of the groove 110, and the other side of the second part is connected to the end surface of the limiting boss 21.

[0038] When the vibration damping gear 100 rotates, the wheel hub 1 and the gear ring 2 rotate relative to each other, and one of the two relative parts in the first part parallel to the gear shaft is deformed by the tangential force; when the vibration damping gear 100 rotates, one of the two relative parts in the first part perpendicular to the gear shaft is deformed by the axial force; when the vibration damping gear 100 rotates, the second part is deformed by the radial force.

[0039] In this embodiment, by arranging the first part of the first vibration damping portion 31 on the side wall of the groove 110 and the outer peripheral surface of the limiting boss 21, the first part can improve the vibration and noise generated by the tangential force and axial force of the vibration damping gear 100; by arranging the second part between the bottom wall of the groove 110 and the end face of the limiting boss 21, the second part can improve the vibration and noise generated by the radial force of the vibration damping gear 100, thereby effectively enhancing the vibration reduction and noise reduction effects of the vibration damping gear 100.

[0040] In one embodiment of the present invention, Figure 2 As shown, the distance between the limiting boss 21 and the bottom wall of the groove 110 is a first distance L1, and the distance between the limiting boss 21 and the peripheral wall of the groove 110 is a second distance L2. Both the first distance and the second distance are configured to be less than or equal to the deformation distance of the vibration damping member 3 at a preset maximum load.

[0041] Specifically, the first spacing and the second spacing are obtained by simulation calculation according to the deformation compression rate of the rubber used in the damping gear 100 and the torsional deformation distance when the load is maximum. The first spacing and the second spacing are both less than or equal to the deformation distance of the damping member 3 under extreme working conditions.

[0042] Therefore, by setting the first spacing and the second spacing to be less than or equal to the deformation distance of the vibration damper 3 at the preset maximum load, the maximum deformation of the vibration damper 3 can be accurately controlled, so that the maximum deformation distance of the vibration damper 3 is less than or equal to the deformation distance of the vibration damper 3 under extreme working conditions, thereby achieving the use of limited hard connection to deal with extreme working conditions and ensuring the reliability of the vibration damping gear 100. At the same time, since the possibility of extreme working conditions is small, the vibration damper 3 can use rubber with lower stiffness, so as to achieve a better vibration reduction effect.

[0043] In one embodiment of the present invention, Figure 1 and Figure 3 As shown, the vibration damping member 3 further includes: a second vibration damping portion 32 , which is connected to the first vibration damping portion 31 , extends along the circumferential direction of the wheel hub 1 , and is connected between the outer circumferential surface of the wheel hub 1 and the inner circumferential surface of the gear ring 2 .

[0044] For example, the second vibration damping part 32 is connected to the first vibration damping part 31. Further, the number of the second vibration damping parts 32 can be multiple, for example, the number of the second vibration damping parts 32 can be two, three, four, five, six or more, the shape of the projection of the second vibration damping part 32 in the axial direction is a fan ring, and the multiple second vibration damping parts 32 are evenly arranged along the circumference of the hub 1, and are arranged between the outer circumference of the hub 1 and the inner circumference of the gear ring 2. Specifically, the inner circumference of the second vibration damping part 32 is connected to the outer circumference of the hub 1, and the outer circumference of the second vibration damping part 32 is connected to the inner circumference of the gear ring 2.

[0045] When an impact torque is generated on the gear shaft, the second vibration damping part 32 will be compressed and deformed to absorb the energy generated by the impact torque on the gear shaft. When an impact torque is generated on the gear ring 2, the second vibration damping part 32 will also be compressed and deformed to absorb the energy generated by the impact torque on the gear ring 2.

[0046] This embodiment, by providing a second vibration-damping portion 32 in the vibration-damping gear 100, can effectively reduce the rigid impact force transmitted to the ring gear 2, and can also effectively reduce the influence of the impact torque on the gear shaft, thereby ensuring the torsional stiffness, transmission accuracy and transmission efficiency of the vibration-damping gear 100, and at the same time can further improve the vibration reduction and noise reduction effects of the vibration-damping gear 100.

[0047] In one embodiment of the present invention, Figure 1 As shown, a radially protruding mating boss 11 is formed on the other one of the wheel hub 1 and the gear ring 2 . The mating boss 11 is annular and defines a groove 110 on the inner side.

[0048] For example, a mating boss 11 is provided on the outer circumferential surface of the hub 1. Further, the number of the mating bosses 11 may be multiple, for example, the number of the mating bosses 11 may be two, three, four, five, six or more. The mating bosses 11 are evenly arranged along the circumference of the hub 1, the mating bosses 11 are annular, and a groove 110 is formed inside the mating bosses 11, and the limiting boss 21 is located in the groove 110.

[0049] When the damping gear 100 rotates, the mating boss 11 can cooperate with the first damping portion 31 and the limiting boss 21, so that the hub 1 and the gear ring 2 can rotate together, and at the same time, the relative movement distance of the hub 1 and the gear ring 2 in the axial direction can be limited. When extreme working conditions occur, the mating boss 11 can form a hard connection with the limiting boss 21 to maintain the operation of the gear.

[0050] This embodiment can ensure the cross-sectional area of ​​the damping gear 100 in the radial direction by providing the mating boss 11 protruding in the radial direction, thereby effectively ensuring the torsional rigidity of the damping gear 100, and further fully ensuring the transmission accuracy and transmission efficiency of the damping gear 100. In addition, by providing the mating boss 11 and forming the groove 110 on the mating boss 11, it is unnecessary to form the groove 110 on the surface of the hub 1 by depression, thereby ensuring the structural strength of the hub 1.

[0051] In one embodiment of the present invention, Figure 1 As shown, a connecting hole 111 is formed on the mating boss 11, and the connecting hole 111 passes through the mating boss 11 along the wall thickness direction of the mating boss 11. The vibration damper 3 also includes: a connecting portion 33, which is inserted into the connecting hole 111 and connected between the first vibration damping portion 31 and the second vibration damping portion 32.

[0052] The connection part 33 of the vibration damper 3 is arranged in the connecting hole 111 and is located between the first part of the first vibration damper 31 and the second vibration damper 32. The cross-sectional shape of the connecting hole can be circular, elliptical or polygonal, one end of the connecting part 33 is connected to the first part of the first vibration damper 31, and the other end of the connecting part 33 is connected to the second vibration damper 32. The connecting part 33 corresponds to the connecting hole one by one, and the number of the connecting part 33 is consistent with the connecting hole 111.

[0053] When producing the vibration-damping gear 100, the positions of the hub 1 and the ring gear 2 are first fixed, and then the hydrogenated nitrile rubber is injected through the connecting hole 111. The hydrogenated nitrile rubber flows and fills the gap between the limiting boss 21 and the matching boss 11 and the connecting hole 111, and finally forms the first vibration-damping part 31 and the connecting part 33.

[0054] Therefore, by setting the connecting hole 111 on the mating boss 11, when the vibration damper 3 is molded between the wheel hub 1 and the ring gear 2, the sulfide hydrogenated nitrile rubber can be quickly filled between the groove 110 and the limiting boss 21, and the vulcanization can be completed quickly, so that the rubber can effectively isolate the limiting boss 21 and the mating boss 11, thereby improving the finished product quality and molding efficiency of the vibration damper 3.

[0055] In one embodiment of the present invention, Figure 1 As shown, the communicating hole 111 is formed on two opposite side walls of the mating boss 11 in the circumferential direction of the wheel hub 1 , and penetrates the mating boss 11 along the circumferential direction of the wheel hub 1 .

[0056] For example, connecting holes 111 are provided on two opposite parts of the mating boss 11 parallel to the axial direction. The connecting holes 111 penetrate the mating boss 11 along the circumferential direction of the wheel hub 1, that is, two connecting holes 111 are provided on each mating boss 11, and the connecting holes 111 connect the space formed by the mating boss 11 with the space formed by the inner peripheral surface of the gear ring 2 and the outer peripheral surface of the wheel hub 1.

[0057] When producing the vibration damping gear 100, first fix the positions of the wheel hub 1 and the ring gear 2, and then continuously inject hydrogenated nitrile rubber into the space formed by the inner circumference of the ring gear 2, the outer circumference of the wheel hub 1 and the mold. The hydrogenated nitrile rubber can flow into the gap between the limiting boss 21 and the matching boss 11 through the connecting hole 111, and quickly fill the gap between the limiting boss 21 and the matching boss 11 and the connecting hole 111. Finally, the first vibration damping part 31, the second vibration damping part 32 and the connecting part 33 are integrally formed.

[0058] Therefore, by providing the connecting hole 111 on the two side walls of the mating boss 11 which are opposite to each other in the circumferential direction of the wheel hub 1, not only can the first vibration damping part 31, the second vibration damping part 32 and the connecting part 33 be integrally formed, thereby further improving the convenience of assembling the vibration damping component 3, but also the flow speed of the liquid sulfide hydrogenated nitrile rubber flowing through the connecting hole 111 into the groove 110 and the limiting boss 21 can be further improved, thereby improving the finished product quality of the vibration damping component 3.

[0059] In one embodiment of the present invention, Figure 1-Figure 2 As shown, the limiting boss 21 is formed on the inner wall surface of the ring gear 2 and protrudes inward along the radial direction of the ring gear 2, the matching boss 11 is formed on the outer peripheral surface of the hub 1 and protrudes outward along the radial direction of the hub 1, and the end faces of the matching boss 11 at both ends of the axial direction of the damping gear 100 are respectively flush with the end faces of the hub 1 at both ends.

[0060] For example, the limiting boss 21 is arranged on the inner wall surface of the gear ring 2 and protrudes inwardly in the radial direction of the gear ring 2. The cross section of the limiting boss 21 perpendicular to the radial direction of the gear ring 2 is rectangular. The end face of the limiting boss 21 in the radial direction of the gear ring 2 facing the wheel hub 1 is a circular arc cylinder, and the central axis of the circular arc cylinder coincides with the central axis of the damping gear 100. The matching boss 11 is arranged on the outer peripheral surface of the wheel hub 1 and protrudes outwardly in the radial direction of the wheel hub 1. The cross section of the matching boss 11 perpendicular to the radial direction of the gear ring 2 is annular. The end face of the matching boss 11 in the radial direction of the gear ring 2 facing the wheel hub 1 is a circular arc cylinder, and the central axis of the circular arc cylinder coincides with the central axis of the damping gear 100.

[0061] In this embodiment, by arranging the end faces of the mating boss 11 at both ends of the vibration damping gear 100 in the axial direction to be flush with the end faces of the hub 1, the dimensions of the limiting boss 21, the mating boss 11 and the first vibration damping part 31 in the axial direction can be effectively increased, thereby further increasing the reliability of the vibration damping gear 100 when subjected to force.

[0062] In one embodiment of the present invention, Figure 1 As shown, there are multiple limiting bosses 21 , which are evenly spaced and arranged in the circumferential direction of the gear ring 2 , and the number of the grooves 110 corresponds to the number of the limiting bosses 21 .

[0063] For example, the number of the limiting bosses 21 can be two, three, four, five, six or more. The plurality of limiting bosses 21 are evenly spaced and distributed on the inner circumference of the gear ring 2, the number of the grooves 110 is consistent with the limiting bosses 21, and the grooves 110 correspond to the limiting bosses 21 one by one. When the damping gear 100 rotates, the plurality of limiting bosses 21 can jointly and evenly share the external force.

[0064] Therefore, by evenly arranging a plurality of limit bosses 21 on the inner circumferential surface of the gear ring 2, the plurality of limit bosses 21 can jointly bear the external force, and the external force borne by each limit boss 21 is close, thereby improving the rationality of the force applied to the limit boss 21, and further effectively protecting the vibration damping gear 100 and extending the service life of the vibration damping gear 100.

[0065] The power system according to the second aspect of the present invention includes the damping gear 100 according to the first aspect of the present invention. For example, the damping gear 100 is arranged in the power system, and the damping gear 100 can effectively transmit the power generated by the power system, and play the effect of vibration reduction and noise reduction, and can also extend the service life of the power system.

[0066] According to the power system of the embodiment of the utility model, by providing the damping gear 100 of the first embodiment, the overall performance of the power system can be effectively improved.

[0067] The power system of the above embodiment can be applied to a vehicle. For example, a power system is provided in a vehicle, and the power system has the function of reducing vibration and noise, and can continuously and smoothly provide the power required by the vehicle.

[0068] As a result, the riding comfort of the vehicle can be effectively improved, the vehicle maintenance cost can be effectively reduced, and the user experience can be effectively improved.

[0069] The following will refer to Figure 1-Figure 3 A damping gear 100 according to a specific embodiment of the present invention is described.

[0070] The vibration-damping gear 100 includes a wheel hub 1, a gear ring 2 and a vibration-damping member 3. The wheel hub 1 is provided with a mating boss 11, the mating boss 11 is provided with a connecting hole 111, and a connecting portion 33 is arranged in the connecting hole 111; the gear ring 2 is provided with a limiting boss 21; the vibration-damping member 3 includes a first vibration-damping portion 31, a second vibration-damping portion 32 and a connecting portion 33, wherein the first vibration-damping portion 31 includes a first part and a second part.

[0071] The outer peripheral surface of the hub 1 is provided with a mating boss 11 protruding outward in the radial direction of the hub 1. The cross section of the mating boss 11 perpendicular to the radial direction of the gear ring 2 is annular. The end face of the mating boss 11 facing the gear ring 2 in the radial direction of the gear ring 2 is a circular cylindrical surface. The central axis of the circular cylindrical surface coincides with the central axis of the damping gear 100. The mating boss 11 forms a groove 110 on the inner side. The end faces of the mating boss 11 at both ends of the axial direction of the damping gear 100 are flush with the end faces of the hub 1 at both ends. There are four mating bosses 11, and the mating bosses 11 are evenly arranged along the axial direction of the hub 1. The connecting holes 111 are provided on two opposite parts of the mating boss 11 parallel to the axial direction. The connecting holes 111 penetrate the mating boss 11 along the circumferential direction of the hub 1. The cross-sectional shape of the connecting hole is circular. There are eight connecting holes 111. The connecting portion 33 is disposed in the connecting hole 111 , one end of the connecting portion 33 is connected to the first portion of the first vibration damping portion 31 , and the other end of the connecting portion 33 is connected to the second vibration damping portion 32 . The connecting portions 33 correspond to the connecting holes one by one, and the number of the connecting portions 33 is consistent with the connecting holes 111 .

[0072] A limiting boss 21 protruding inwardly in the radial direction of the gear ring 2 is provided on the inner circumferential surface of the gear ring 2. The cross-section of the limiting boss 21 in the radial direction perpendicular to the gear ring 2 is rectangular. The end face of the limiting boss 21 at one end facing the hub 1 in the radial direction of the gear ring 2 is an arc cylinder. The central axis of the arc cylinder coincides with the central axis of the damping gear 100. There are four limiting bosses 21, and the limiting bosses 21 are evenly arranged along the axial direction of the hub 1.

[0073] The first part of the first vibration damping part 31 has a ring-shaped cross section perpendicular to the radial direction of the hub 1, and the first part extends outwardly along the radial direction of the hub 1 to the top of the groove 110. The first part is located between the outer peripheral surface of the limiting boss 21 and the peripheral wall of the groove 110, the outer peripheral surface of the first part is connected to the peripheral wall of the groove 110, and the inner peripheral surface of the first part is connected to the outer peripheral surface of the limiting boss 21. The second part of the first vibration damping part 31 is connected to the first part, and the second part is arranged between the end face of the limiting boss 21 and the bottom wall of the groove 110, one side of the second part is connected to the bottom wall of the groove 110, and the other side of the second part is connected to the end face of the limiting boss 21. The number of the first vibration damping parts 31 is four. The second vibration damping portion 32 is connected to the first vibration damping portion 31 through a connecting portion 33. The projection of the second vibration damping portion 32 in the axial direction is in the shape of a sector ring. There are four second vibration damping portions 32. The second vibration damping portions 32 are evenly arranged along the circumference of the hub 1 and are disposed between the outer circumference of the hub 1 and the inner circumference of the gear ring 2. The inner circumference of the second vibration damping portion 32 is connected to the outer circumference of the hub 1, and the outer circumference of the second vibration damping portion 32 is connected to the inner circumference of the gear ring 2.

[0074] When the vibration damping gear 100 rotates, the vibration damping gear 100 can withstand tangential force, axial force and radial force. When the vibration damping gear 100 rotates, the hub 1 and the gear ring 2 rotate relative to each other, and one of the two relative parts in the first part parallel to the gear shaft is deformed by the tangential force; when the vibration damping gear 100 rotates, the hub 1 and the gear ring 2 move relative to each other in the axial direction, and one of the two relative parts in the first part perpendicular to the gear shaft is deformed by the axial force; when the vibration damping gear 100 rotates, the hub 1 and the gear ring 2 move relative to each other in the radial direction, and the second part is deformed by the radial force.

[0075] The spacing between the limiting boss 21 and the bottom wall of the groove 110 is set to a first spacing L1, and the spacing between the limiting boss 21 and the peripheral wall of the groove 110 is set to a second spacing L2. According to the deformation compression rate of the rubber used in the vibration damping gear 100 and the torsional deformation distance when the load is maximum, the first spacing L1 and the second spacing L2 are obtained by simulation calculation. And the first spacing L1 and the second spacing L2 are both less than or equal to the deformation distance of the vibration damping member 3 under extreme working conditions. Therefore, the maximum deformation of the vibration damping member 3 can be accurately controlled, so that the maximum deformation distance of the vibration damping member 3 is less than or equal to the deformation distance of the vibration damping member 3 under extreme working conditions, thereby achieving the use of limiting hard connection to deal with extreme working conditions and ensuring the reliability of the vibration damping gear 100. At the same time, since the possibility of extreme working conditions is small, the vibration damping member 3 can use rubber with lower stiffness, so as to achieve a better vibration damping effect. In addition, the vibration damping gear 100 can be set as a helical gear, so that the gear overlap ratio can be improved, the vibration reduction and noise reduction effects can be further improved, and the scope of application of the vibration damping gear 100 is expanded.

[0076] When producing the vibration damping gear 100, the positions of the wheel hub 1 and the ring gear 2 are first fixed, and then the hydrogenated nitrile rubber is continuously injected into the space formed by the inner circumference of the ring gear 2, the outer circumference of the wheel hub 1 and the mold. The hydrogenated nitrile rubber can flow into the gap between the limiting boss 21 and the matching boss 11 through the connecting hole 111, and quickly fill the gap between the limiting boss 21 and the matching boss 11 and the connecting hole 111, thereby quickly completing the vulcanization, so that the first vibration damping part 31, the second vibration damping part 32 and the connecting part 33 are integrally formed, thereby improving the finished product quality of the vibration damping component 3.

[0077] According to the vibration-damping gear 100 of the utility model, by providing the mutually matching limiting boss 21, the groove 110 and the vibration-damping member 3 in the vibration-damping gear 100, the vibration impact can be effectively absorbed, thereby further improving the vibration-damping performance, reducing noise, and greatly improving the service life of the vibration-damping gear 100. At the same time, it can withstand external forces in the axial direction of the gear, and increase the reliability of the vibration-damping gear 100 when subjected to force, so that the vibration-damping gear 100 can be set not only as a spur gear, but also as a helical gear, thereby expanding the scope of application of the vibration-damping gear 100.

[0078] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0079] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0080] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0081] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0082] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A vibration-damping gear, characterized in that: include: Wheel hub; A gear ring, wherein the gear ring is sleeved on the radial outer side of the wheel hub, one of the wheel hub and the gear ring is formed with a limiting boss and the other is formed with a groove, and the limiting boss is matched in the groove; A vibration damper, which extends in a ring shape along the circumference of the wheel hub and is sleeved between the wheel hub and the ring gear. The vibration damper includes a first vibration damper portion, at least part of which is connected between the inner wall of the groove and the outer peripheral surface of the limiting boss.

2. The damping gear according to claim 1, characterized in that: The first vibration-damping portion includes a first part and a second part, the first part is annular and sleeved on the outer circumferential surface of the limiting boss, and the second part is connected to the first part and connected between the end surface of the limiting boss and the bottom wall of the groove.

3. The damping gear according to claim 2, characterized in that: The distance between the limiting boss and the bottom wall of the groove is a first distance, and the distance between the limiting boss and the peripheral wall of the groove is a second distance. Both the first distance and the second distance are configured to be less than or equal to the deformation distance of the vibration damping member at a preset maximum load.

4. The damping gear according to claim 1, characterized in that: The vibration damping member further includes a second vibration damping portion connected to the first vibration damping portion, extending along the circumferential direction of the wheel hub and connected between the outer circumferential surface of the wheel hub and the inner circumferential surface of the gear ring.

5. The damping gear according to claim 4, characterized in that: A matching boss protruding in the radial direction is formed on the other one of the wheel hub and the gear ring. The matching boss is annular and defines the groove on the inner side.

6. The damping gear according to claim 5, characterized in that: A connecting hole is formed on the mating boss, and the connecting hole penetrates the mating boss along the wall thickness direction of the mating boss. The vibration damping member further includes a connecting portion, which is disposed in the connecting hole and connected between the first vibration damping portion and the second vibration damping portion.

7. The damping gear according to claim 6, characterized in that: The communicating hole is formed on two side walls of the matching boss that are opposite to each other in the circumferential direction of the wheel hub, and passes through the matching boss along the circumferential direction of the wheel hub.

8. The damping gear according to claim 5, characterized in that: The limiting boss is formed on the inner wall surface of the gear ring and protrudes inwardly along the radial direction of the gear ring. The matching boss is formed on the outer peripheral surface of the hub and protrudes outward in the radial direction of the hub. The end surfaces of both ends of the matching boss in the axial direction of the damping gear are respectively flush with the end surfaces of both ends of the hub.

9. The damping gear according to claim 1, characterized in that: There are multiple limiting bosses, which are evenly spaced and arranged in the circumferential direction of the gear ring, and the number of the grooves corresponds to the limiting bosses one by one.

10. A power system, characterized in that: The invention comprises a vibration reducing gear according to any one of claims 1 to 9.

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