Shock-absorbing gears and vehicles

Abstract

This application discloses a shock-absorbing gear and a vehicle. The gear includes a gear shaft, an elastic damping element, and a gear ring. The gear shaft is inserted into the gear ring and includes a first mating surface. The gear ring includes a second mating surface, and the first and second mating surfaces face each other. The elastic damping element is connected to both the first and second mating surfaces, wherein the deformation direction of the elastic damping element is parallel to the rotation direction of the gear ring. The gear ring includes a boss, and a insertion groove is provided in the first mating surface. The gear ring and the gear shaft are connected through the boss and the insertion groove, and the length of the boss is less than the length of the insertion groove. The shock-absorbing gear disclosed in this application can solve the knocking noise problem and meet the operating conditions under high torque.

Description

Technical Field

[0001] This application relates to the field of automotive technology, specifically to a shock-absorbing gear and a vehicle. Background Technology

[0002] Gear transmission mechanisms are characterized by high transmission efficiency, compact structure, reliable operation, and stable transmission ratio. They are one of the most important mechanical transmission methods and are widely used in various mechanical structures.

[0003] In order to ensure the formation of a normal lubricating oil film between the tooth surfaces and to prevent the gear teeth from jamming due to thermal expansion and deformation caused by the increase of gear operating temperature, a pair of meshing gears must have appropriate tooth flank clearance. Therefore, knocking noise will occur during gear transmission.

[0004] In existing vibration-damping gears, the gear ring has a circular structure, the gear shaft has a cylindrical structure, and the gear ring is fitted outside the gear shaft. An elastic buffer is placed between the gear ring and the gear shaft, and torque is transmitted only through the elastic buffer. Although this arrangement can alleviate the knocking noise problem during transmission, the elastic buffer has limited deformation capacity. When the torque to be transmitted is large, the elastic buffer is always in a state of deformation limit, making it very easy to be damaged. Moreover, the transmitted torque is not stable enough and cannot cope with the operating conditions of high torque, making it difficult to meet the reliability requirements of gear transmission. Summary of the Invention

[0005] In view of this, this application provides a shock-absorbing gear that can reduce knocking noise while meeting the operating conditions under high torque.

[0006] The specific technical solution adopted in this application is as follows:

[0007] A first aspect of this application provides a shock-absorbing gear, the gear comprising: a gear shaft, an elastic shock-absorbing element, and a gear ring;

[0008] The gear shaft is inserted into the gear ring, the gear shaft includes a first mating surface, the gear ring includes a second mating surface, the first mating surface and the second mating surface face each other, the elastic damping element is connected to the first mating surface and the second mating surface respectively, wherein the deformation direction of the elastic damping element is parallel to the rotation direction of the gear ring;

[0009] The gear ring includes a boss, and a insertion groove is provided in the first mating surface. The gear ring and the gear shaft are connected through the boss and the insertion groove, and the length of the boss is less than the length of the insertion groove.

[0010] Optionally, the gear ring includes a plurality of bosses, which are evenly distributed in a ring along the second mating surface;

[0011] The first mating surface is provided with a plurality of insertion slots, and the positions of the plurality of insertion slots correspond to the positions of the boss.

[0012] The gear ring and the gear shaft are detachably connected via the boss and the insertion slot.

[0013] Optionally, the boss is a rectangular spline or a partially involute spline.

[0014] Optionally, a first damping groove is formed on the first mating surface, and a second damping groove is formed on the second mating surface. The first side of the elastic damping element is located in the first damping groove, and the second side of the elastic damping element is located in the second damping groove.

[0015] Optionally, the first mating surface is provided with a plurality of first damping grooves, which are evenly distributed around the first mating surface in a circumferential direction. The second mating surface is provided with a plurality of second damping grooves, which are evenly distributed around the second mating surface in a circumferential direction. One first damping groove and a corresponding first or second damping groove are opposite to each other.

[0016] The gear includes a plurality of elastic damping elements, with a first side of each elastic damping element located in a corresponding first damping groove and a second side of each elastic damping element located in a corresponding second damping groove.

[0017] Optionally, the elastic damping element is an elastic structure made of any one of the following materials: spring, two-way pressure valve, phenolic resin, nylon, modified rubber, and acrylate rubber.

[0018] Optionally, the gear shaft includes a first stepped structure, and the first mating surface is located on the first stepped structure;

[0019] The gear ring includes a second stepped structure, and the second mating surface is located on the second stepped structure;

[0020] The damping gear is a helical gear, the first step structure and the second step structure are engaged, and the first mating surface and the second mating surface face each other along the axial direction of the damping gear.

[0021] Optionally, the gear further includes: a bearing and a first limiting member;

[0022] The gear shaft includes a first cylindrical section and a second cylindrical section in sequence along the axial direction, and the connection between the first cylindrical section and the second cylindrical section forms the first stepped structure;

[0023] An installation gap is formed between the first cylindrical section and the gear ring, and the bearing is fixed to the outer wall of the gear shaft and located in the installation gap;

[0024] A first annular groove is provided on the side of the first cylindrical segment near the second cylindrical segment. The first limiting member is installed in the first annular groove, and the side of the first limiting member away from the bearing abuts against the second stepped structure to limit the gear shaft and the gear ring in the axial direction.

[0025] The damping gear is a helical gear, and the first mating surface and the second mating surface face each other along the axial direction of the damping gear.

[0026] Optionally, a second annular groove is provided on the side of the first cylindrical segment away from the second cylindrical segment, the second limiting member is installed in the second annular groove, and the side of the second limiting member close to the first limiting member abuts against the bearing.

[0027] The first cylindrical segment includes a third step structure, which is located on the side of the first cylindrical segment close to the second cylindrical segment. The bearing abuts against the third step structure and the second limiting member on both sides along the axial direction of the gear ring, thereby the bearing is clamped by the third step structure and the second limiting member.

[0028] A second aspect of this application provides a vehicle including the aforementioned shock-absorbing gear.

[0029] The shock-absorbing gear and vehicle provided in this application embodiment have a gear shaft inserted into a gear ring. Elastic damping elements are connected to both the gear shaft and the gear ring. Due to the presence of a boss and a slot, and the boss's length being less than the slot's length, after the gear shaft and gear ring are assembled, initially, there is an assembly gap between the two ends of the boss and the sidewall of the slot. That is, after the gear shaft and gear ring are connected via the boss and slot, in their natural state, the gear ring and gear shaft can rotate freely to a certain extent. As the torque gradually increases from zero, the elastic damping element is gradually compressed, and torque is transmitted between the gear shaft and gear ring through the elastic damping element. The phase of the gear shaft and gear ring... The position has changed to a certain extent. At this time, the boss does not touch the side wall of the insertion slot along the extension direction. When the torque gradually increases, the elastic damping element is further compressed and the deformation increases. Before reaching the maximum safe deformation, the assembly gap disappears. One side of the boss just abuts against the side wall of the insertion slot along the extension direction. The gear shaft and gear ring become a rigid mechanical connection, which can reliably transmit large torque. Due to the existence of the elastic damping element and the installation gap, the force to eliminate the gap is gradual. The damping gear provided in this application can not only alleviate knocking noise at low torque, but also meet the reliability requirements of gear transmission at high torque. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of a gear shaft provided in an embodiment of this application;

[0032] Figure 2 This is a schematic diagram of the structure of a gear ring provided in an embodiment of this application;

[0033] Figure 3 This is a schematic diagram of the first structure of a shock-absorbing gear provided in the embodiments of this application;

[0034] Figure 4 This is a schematic diagram of a second structure of a shock-absorbing gear provided in an embodiment of this application;

[0035] Figure 5 This is a first partially enlarged schematic diagram of a shock-absorbing gear provided in an embodiment of this application;

[0036] Figure 6 This is a second partially enlarged schematic diagram of a shock-absorbing gear provided in an embodiment of this application;

[0037] Figure 7 This is a schematic diagram of a third structure of a shock-absorbing gear provided in an embodiment of this application;

[0038] Figure 8 This is a partially enlarged schematic diagram of the gear shaft provided in an embodiment of this application.

[0039] Figure label:

[0040] 1. Gear shaft; 11. First step structure; 12. First mating surface; 13. First damping groove; 14. First annular groove; 15. Insertion groove; 16. Third step structure;

[0041] 2. Elastic damping elements;

[0042] 3. Gear ring; 31. Second step structure; 32. Second mating surface; 33. Second damping groove; 34. Second annular groove; 35. Boss;

[0043] 4. Bearing; 41. First limiting component; 42. Second limiting component;

[0044] 5. Assembly clearance.

[0045] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] Gear transmission mechanisms are highly efficient, compact, reliable, and have stable transmission ratios, making them one of the most important mechanical transmission methods and widely used in various mechanical structures. During gear design, to ensure the formation of a proper lubricating oil film between the tooth surfaces and to prevent tooth jamming due to thermal expansion caused by increased gear operating temperature, a pair of meshing gears must have appropriate tooth flank clearance. Inevitably, fluctuations in transmitted torque and speed occur during gear transmission. Under these circumstances, tooth flank clearance inevitably leads to knocking noise during transmission.

[0048] In existing vibration-damping gears, the gear ring has a circular structure, the gear shaft has a cylindrical structure, and the gear ring is fitted outside the gear shaft. An elastic buffer is placed between the gear ring and the gear shaft, and torque is transmitted between them through the elastic buffer. Although this arrangement can alleviate the knocking noise problem during transmission, the elastic buffer has limited deformation capacity. When the torque to be transmitted is large, the elastic buffer is always in a state of deformation limit, making it very easy to be damaged. Moreover, the transmitted torque is not stable enough and cannot cope with the operating conditions of high torque, making it difficult to meet the reliability requirements of gear transmission.

[0049] It should be noted that the shock-absorbing gear provided in this application is coupled with another gear. For ease of description, the shock-absorbing gear provided in this application will be referred to as the driving gear, and the gear coupled with it will be referred to as the driven gear.

[0050] In response, this application provides a shock-absorbing gear, such as... Figures 1 to 4As shown, the gear includes: a gear shaft 1, an elastic damping element 2, and a gear ring 3; the gear shaft 1 is inserted into the gear ring 3, the gear shaft 1 includes a first mating surface 12, the gear ring 3 includes a second mating surface 32, the first mating surface 12 and the second mating surface 32 face each other, the elastic damping element 2 is connected to the first mating surface 12 and the second mating surface 32 respectively, wherein the deformation direction of the elastic damping element 2 is parallel to the rotation direction of the gear ring 3; the gear ring 3 includes a boss 35, the first mating surface 12 is provided with an insertion groove 15, the gear ring 3 and the gear shaft 1 are connected through the boss 35 and the insertion groove 15, and the length of the boss 35 is less than the length of the insertion groove 15.

[0051] In this embodiment, the gear shaft 1 is inserted into the gear ring 3, and the elastic damping element 2 is connected to both the gear shaft 1 and the gear ring 3. Because a boss 35 and a insertion slot 15 are provided, and the length of the boss 35 is less than the length of the insertion slot 15, after the gear shaft 1 and gear ring 3 are assembled, in the initial state, there is an assembly gap 5 between the two ends of the boss 35 and the sidewall of the insertion slot 15. That is, after the gear shaft 1 and gear ring 3 are connected through the boss 35 and the insertion slot 15, in a natural state, the gear ring 3 and gear shaft 1 can rotate freely to a certain extent. When the torque gradually increases from zero, the elastic damping element 2 is gradually compressed, and the torque is transmitted between the gear shaft 1 and gear ring 3 through the elastic damping element 2. The relative position of the boss 35 and the gear ring 3 has changed to a certain extent. At this time, the boss 35 does not touch the side wall of the insertion groove 15 along the extension direction. When the torque gradually increases, the elastic damping element 2 is further compressed and the deformation degree increases. Before reaching the maximum safe deformation, the assembly gap 5 disappears. One side of the boss 35 just abuts against the side wall of the insertion groove 15 along the extension direction. The gear shaft 1 and the gear ring 3 become a rigid mechanical connection, which can reliably transmit large torque. Due to the existence of the elastic damping element 2 and the installation gap, the force to eliminate the gap is gradual. The damping gear provided by this application can not only alleviate knocking noise at low torque, but also meet the reliability requirements of gear transmission at high torque.

[0052] Furthermore, the working conditions of the shock-absorbing gear mainly include the following three stages, through which the working principle of the shock-absorbing gear provided in this application will be explained in detail.

[0053] It should be noted that the following three stages are explained using helical gears as an example for adaptive explanation.

[0054] Phase 1: The power source starts up, and the torque gradually increases from zero.

[0055] The power source outputs power, which is transmitted to the gear shaft 1. The force on the gear shaft 1 first acts on the elastic damping element 2, at which point the elastic damping element 2 deforms and drives the gear ring 3 that mates with the gear shaft 1. There is an assembly clearance 5 between the driving gear and the driven gear, which is the gap between the boss and the side wall of the insertion slot. Due to the presence of the elastic damping element 2, the force for eliminating the clearance is gradual, thereby reducing the impact generated when eliminating the tooth backlash between the driving gear and the driven gear, and greatly reducing the knocking noise problem during gear meshing.

[0056] Second stage: The power source is working, and the torque is increased to the maximum.

[0057] As the torque output from the power source to the gear shaft 1 gradually increases, the gradual force on the elastic damping element 2 drives the driven gear to rotate. As the torque continues to increase, the deformation of the elastic damping element 2 increases. Before the force exceeds the bearing limit of the elastic damping element 2, the assembly gap 5 between the gear ring 3 and the gear shaft 1 is eliminated, and the boss directly contacts the side wall of the insertion slot. The gear shaft 1 and the gear ring 3 become a rigid mechanical connection, which can reliably and stably transmit power.

[0058] Third stage: The power source is disconnected, and the torque gradually decreases.

[0059] After the power source is disconnected, the driven gear that meshes with the damping gear continues to rotate due to the inertia of the load. The driving gear, having lost its driving force, will be dragged by the driven gear, effectively swapping the original driving and driven gears. During this process, the working tooth surfaces switch, and due to the tooth backlash and the rotational inertia of the gear and gear shaft 1, there is a risk of gear knocking. The force received by the driving gear first acts on the elastic damping element 2, which then drives the gear shaft 1 to rotate. At this point, due to the presence of the elastic damping element 2, the force for eliminating backlash is gradual, thus reducing the impact when eliminating gear backlash. If the torque or rotational inertia of the driven gear is still large after the tooth surface switch, the elastic damping element 2 deforms and increases again. Before the elastic damping element 2 reaches its deformation limit, the assembly gap 5 between the gear ring 3 and the gear shaft 1 is eliminated, becoming a rigid mechanical connection that can reliably drive the driving gear and gear shaft 1 to rotate. As the torque gradually decreases, the assembly gap 5 between the gear shaft 1 and the gear ring 3 gradually recovers. Before the rotation stops, the torque is transmitted between the gear shaft 1 and the gear ring 3 by the elastic damping element 2, which alleviates the vibration throughout the process after the power source is disconnected.

[0060] Furthermore, the damping gear provided in this application can be a helical gear or a spur gear, and those skilled in the art can select and adjust it according to actual needs.

[0061] Optionally, when the damping gear is a spur gear, the assembly gap 5 is located between the boss 35 and the side wall of the insertion groove 15, and the elastic damping element 2 is disposed between the gear shaft 1 and the gear ring 3, and connected to both respectively. As the torque gradually increases, the assembly gap 5 between the boss 35 and the side wall of the insertion groove 15 gradually decreases until it disappears. Specifically, it can be divided into the above three working stages, and its working principle is the same as that when the damping gear is a helical gear. This application will not elaborate further on this.

[0062] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the gear ring 3 includes multiple bosses 35, which are evenly distributed in a ring along the second mating surface 32; multiple insertion slots 15 are provided in the first mating surface 12, and the positions of the multiple insertion slots 15 correspond to the positions of the bosses 35; the gear ring 3 and the gear shaft 1 are detachably connected through the bosses 35 and the insertion slots 15.

[0063] Multiple bosses 35 are evenly distributed on the first mating surface 12 of the gear ring 3, and multiple insertion slots 15 are provided on the second mating surface 32 corresponding to the multiple bosses 35. The gear ring 3 and the gear shaft 1 are engaged through the bosses 35 and the insertion slots 15. Multiple second damping grooves 33 are located at the intervals between the multiple bosses 35, and multiple first damping grooves 13 are located at the intervals between the multiple insertion slots 15. When the torque increases and a high torque is maintained, the distance between the bosses 35 and the sidewalls of the insertion slots gradually decreases until it disappears, and the gear shaft 1 and the gear ring 3 become a rigid mechanical connection.

[0064] It should be noted that the shape and number of the boss 35 and the damping groove can be selected and adjusted by those skilled in the art according to actual needs.

[0065] Optionally, the boss 35 is a rectangular spline or a partially involute spline.

[0066] It should be noted that the boss 35 provided in the embodiments of this application can also be a connector that can achieve the same function, in addition to rectangular splines and partial involute splines. Those skilled in the art can select and adjust it according to actual needs.

[0067] Optionally, such as Figure 1 and Figure 2 As shown, a first damping groove 13 is provided on the first mating surface 12, and a second damping groove 33 is provided on the second mating surface 32. The first side of the elastic damping element 2 is located in the first damping groove 13, and the second side of the elastic damping element 2 is located in the second damping groove 33.

[0068] The first mating surface 12 of the gear shaft 1 has a first damping groove 13, and the second mating surface 32 of the gear ring 3 has a second damping groove 33. When the gear shaft 1 and the gear ring 3 are mated, a receiving cavity is formed between the first damping groove 13 and the second damping groove 33, and the elastic damping element 2 is disposed therein. The first end of the elastic damping element 2 is located in the first damping groove 13, and the second end of the elastic damping element 2 is located in the second damping groove 33. The first end and the second end are the two ends of the elastic damping element 2 in the width direction. That is, after the elastic damping element 2 is assembled, it is divided into two halves along the length direction, one half is located in the first damping groove 13, and the other half is located in the second damping groove 33. In addition, the length of the elastic damping element 2 under normal conditions is equal to or slightly greater than the length of the receiving cavity.

[0069] It should be noted that the elastic damping element 2, the first damping groove 13 and the second damping groove 33 can be rectangular, circular, strip-shaped, arc-shaped, etc., and the staff can make corresponding selections and adjustments according to actual needs.

[0070] In some embodiments of this application, the first mating surface 12 is provided with a plurality of first damping grooves 13, which are evenly distributed around the first mating surface 12 in the circumferential direction. The second mating surface 32 is provided with a plurality of second damping grooves 33, which are evenly distributed around the second mating surface 32 in the circumferential direction. A first damping groove 13 and a corresponding first or second damping groove 33 are opposite to each other. The gear includes a plurality of elastic damping elements 2, the first side of each elastic damping element 2 is located in the corresponding first damping groove 13, and the second side of each elastic damping element 2 is located in the corresponding second damping groove 33.

[0071] Specifically, in order to ensure the vibration damping effect of the gear and better solve the knocking noise problem, multiple first damping grooves 13 are set on the first mating surface 12, and second damping grooves 33 are set on the second mating surface 32. Multiple elastic damping elements 2 are installed between the gear shaft 1 and the gear ring 3. While enhancing the vibration damping effect, the increased number of elastic damping elements 2 makes the torque transmission more stable.

[0072] It should be noted that the elastic damping element 2 cooperates with the first damping groove 13 and the second damping groove 33. The first damping groove 13 and the second damping groove 33 are arranged circumferentially along the gear shaft 1 and the gear ring 3, respectively, and have an arc-shaped structure. The aforementioned elastic damping element 2 can be a long strip-shaped elastic structure that can cooperate with the first damping groove 13 and the second damping groove 33 in a bent state. Alternatively, the elastic damping element 2 can also be an arc-shaped structure that can be directly installed in the first damping groove 13 and the second damping groove 33.

[0073] Optionally, the elastic damping element 2 is an elastic structure made of any one of the following materials: phenolic resin, nylon, modified rubber, and acrylate rubber.

[0074] It should be noted that the elastic damping element provided in the embodiments of this application can also be an elastic structure made of other materials that can achieve the same function. Those skilled in the art can select and adjust it according to actual needs.

[0075] Optionally, the elastic damping element 2 has metal plates on both sides along the damping gear shaft 1. The metal plates are connected to the elastic structure, and the shape of the metal plates is the same as that of the damping groove described below. After the damping gear is assembled, the two metal plates abut against the two side walls of the insertion groove 15 along the circumferential direction of the gear ring 3, respectively. Power is transmitted through the abutment of the metal plates against the side walls of the insertion groove 15. Compared with the above embodiment, torque can be transmitted more accurately between the gear shaft 1 and the gear ring 3.

[0076] Alternatively, the elastic damping element 2 can also be replaced with a spring or a two-way pressure valve.

[0077] The elastic damping element 2 can be replaced by a helical compression spring. The two end faces along the extension and contraction direction of the spring abut against the two side walls of the insertion groove 15 along the circumferential direction of the gear ring 3, and provide elastic force to the two side walls along the circumferential direction of the damping gear to provide buffering force at low torque.

[0078] The elastic damping element 2 can also be replaced by a two-way pressure valve. The two-way pressure valve includes a first valve body and a second valve body sharing a common valve body. Each of the first and second valve bodies includes a valve core and an elastic element for applying elastic preload to the valve core. The first valve core is located at the first end of the two-way pressure valve, and the second valve core is located at the second end of the two-way pressure valve. The first and second valve cores can extend and retract along the connection direction between the first and second ends. The first and second valve cores respectively abut against the two side walls of the insertion groove 15 along the circumferential direction of the gear ring 3. At low torque, the gear shaft 1 drives the gear ring 3 to rotate through the two-way pressure valve. The axial or radial force generated by the rotation is insufficient to open the two valve cores, and the torque is transmitted through the elastic element in the two check valves. As the torque gradually increases, the force generated by the rotation reaches the set pressure of the two-way pressure valve, the valve cores open, and the two valve cores are squeezed and compressed back by the two side walls of the insertion groove 15 along the circumferential direction of the gear ring 3. At this time, the assembly gap on one side of the boss 35 gradually disappears.

[0079] It should be noted that the elastic damping element 2 provided in the embodiments of this application can also be replaced with other components that can achieve the same function, except for the spring and the two-way pressure valve. Those skilled in the art can select and adjust according to actual needs.

[0080] Optionally, such as Figure 5 and Figure 6As shown, the gear shaft 1 includes a first step structure 11, and a first mating surface 12 is located on the first step structure 11; the gear ring 3 includes a second step structure 31, and a second mating surface 32 is located on the second step structure 31; the first step structure 11 and the second step structure 31 are mated together, and the first mating surface 12 and the second mating surface 32 face each other along the axial or radial direction of the damping gear.

[0081] For helical gears with better meshing performance and greater overlap, the gear shaft 1 and gear ring 3 are engaged by the first step mechanism 11 and the second step structure 31. The first step structure 11 and the second step structure 31 can cancel the axial force generated by the gear shaft 1 and gear ring 3, fix the relative position of the gear shaft 1 and gear ring 3 in the axial direction, and restrict the axial movement of the gear shaft 1 and gear ring 3 caused by the axial force.

[0082] In some embodiments of this application, such as Figure 7 As shown, the gear also includes: a bearing 4 and a first limiting member 41; the gear shaft 1 includes a first cylindrical section and a second cylindrical section in sequence along the axial direction, and a first stepped structure 11 is formed at the connection between the first cylindrical section and the second cylindrical section; an installation gap is formed between the first cylindrical section and the gear ring 3, the inner ring of the bearing 4 is fixed to the outer wall of the gear shaft 1, the outer ring of the bearing 4 is fixed to the inner wall of the gear ring, and is located in the installation gap; a first annular groove 14 is provided on the side of the first cylindrical section near the second cylindrical section, the first limiting member 41 is installed in the first annular groove 14, and the side of the first limiting member 41 away from the bearing 4 abuts against the first stepped structure 11 and the second stepped structure 31 to achieve axial limiting of the gear shaft 1 and the gear ring 3.

[0083] For helical gears, a bearing 4 is additionally provided between the gear shaft 1 and the gear ring 3 in this application. The bearing 4 has a circular ring structure and is fixed to the outer wall of the gear shaft 1, so that the center of the bearing 4 coincides with the center of the gear shaft 1. Furthermore, the side of the bearing 4 away from the gear shaft 1 abuts against the gear ring 3, so that the center of the gear ring 3 coincides with the center of the bearing 4. This ensures that the centers of the gear ring 3 and the gear shaft 1 coincide, which can effectively solve the problem of gear eccentricity in vibration damping. A first limiting member 41 is provided in the first annular groove 14 of the gear shaft 1 to limit the axial movement caused by the axial force of the gear.

[0084] In some embodiments of this application, such as Figure 8 As shown, a second annular groove 34 is provided on the side of the first cylindrical segment away from the second cylindrical segment. The second limiting member 42 is installed in the second annular groove 34, and the side of the second limiting member 42 close to the first limiting member 41 abuts against the bearing 4. The first cylindrical segment includes a third step structure 16, which is located on the side of the first cylindrical segment close to the second cylindrical segment. The bearing 4 abuts against the third step structure 16 and the second limiting member 42 on both sides along the axial direction of the gear ring 3, so that the bearing 4 is clamped by the third step structure 16 and the second limiting member 42.

[0085] To ensure that the bearing 4 does not come out, a second limiting member 42 is provided in the second annular groove 34 of the gear shaft 1. The two sides of the bearing 4 abut against the second limiting member 42 and the third step structure 16 respectively. The bearing 4 is clamped by the third step structure and the second limiting member, which restricts the displacement of the bearing 4 along the axial direction of the gear ring 3 and prevents the bearing 4 from coming out during the operation of the shock-absorbing gear.

[0086] This application also provides a vehicle including the aforementioned shock-absorbing gear.

[0087] In the vehicle provided in this embodiment, the gear shaft is inserted into the gear ring, and the elastic damping element is connected to both the gear shaft and the gear ring. Because a boss and a slot are provided, and the length of the boss is less than the length of the slot, after the gear shaft and gear ring are assembled, initially, there is an assembly gap between the two ends of the boss and the sidewall of the slot. That is, after the gear shaft and gear ring are connected through the boss and the slot, in a natural state, the gear ring and gear shaft can rotate freely to a certain extent. As the torque gradually increases from zero, the elastic damping element is gradually compressed, and the torque is transmitted between the gear shaft and gear ring through the elastic damping element. The relative position of the gear shaft and gear ring... The position has changed to a certain extent. At this time, the boss does not touch the side wall of the insertion slot along the extension direction. When the torque gradually increases, the elastic damping element is further compressed and the degree of deformation increases. Before reaching the maximum installation deformation, the assembly gap disappears. One side of the boss just abuts against the side wall of the insertion slot along the extension direction. The gear shaft and gear ring become a rigid mechanical connection, which can reliably transmit large torque. Due to the existence of the elastic damping element and the installation gap, the force to eliminate the gap is gradual. The damping gear provided by this application can not only alleviate knocking noise at low torque, but also meet the reliability requirements of gear transmission at high torque.

[0088] Optionally, the shock-absorbing gears provided in this application can be applied to devices such as vehicle reducers and gearboxes, and staff can select and adjust them according to actual needs.

[0089] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0090] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0091] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A shock-absorbing gear, characterized in that, The gear includes: a gear shaft (1), an elastic damping element (2), and a gear ring (3); The gear shaft (1) is inserted in the gear ring (3). The gear shaft (1) includes a first mating surface (12), and the gear ring (3) includes a second mating surface (32). The first mating surface (12) and the second mating surface (32) face each other. The elastic damping element (2) is connected to the first mating surface (12) and the second mating surface (32) respectively. The deformation direction of the elastic damping element (2) is parallel to the rotation direction of the gear ring (3). The gear ring (3) includes a boss (35), and a insertion groove (15) is provided in the first mating surface (12). The gear ring (3) and the gear shaft (1) are connected through the boss (35) and the insertion groove (15), and the length of the boss (35) is less than the length of the insertion groove (15). The gear ring (3) includes a plurality of bosses (35), which are evenly distributed in a ring along the second mating surface (32); The first mating surface (12) is provided with a plurality of insertion slots (15), and the positions of the plurality of insertion slots (15) correspond to the positions of the boss (35); The gear ring (3) and the gear shaft (1) are detachably connected by the boss (35) and the insertion slot (15); A first damping groove (13) is provided on the first mating surface (12), and a second damping groove (33) is provided on the second mating surface (32). The first side of the elastic damping element (2) is located in the first damping groove (13), and the second side of the elastic damping element (2) is located in the second damping groove (33). The first mating surface is provided with a plurality of first damping grooves (13), and the plurality of first damping grooves (13) are evenly distributed along the circumference of the first mating surface (12). The second mating surface (32) is provided with a plurality of second damping grooves (33), and the plurality of second damping grooves (33) are evenly distributed along the circumference of the second mating surface (32). One first damping groove (13) and the corresponding first and second damping grooves (33) are opposite to each other. The gear includes a plurality of elastic damping elements (2), with the first side of each elastic damping element (2) located in the corresponding first damping groove (13) and the second side of each elastic damping element (2) located in the corresponding second damping groove (33); A plurality of second damping grooves (33) are located at intervals between a plurality of said bosses (35), and a plurality of first damping grooves (13) are located at intervals between a plurality of said plug grooves (15); In the initial state, the two ends of the boss (35) have an assembly gap (5) between them and the side wall of the insertion groove (15). When the torque increases and remains high, the distance between the boss (35) and the side wall of the insertion slot gradually decreases until it disappears, and the gear shaft (1) and the gear ring (3) become a rigid mechanical connection.

2. The shock-absorbing gear according to claim 1, characterized in that, The boss (35) is a rectangular spline or a partial involute spline.

3. The shock-absorbing gear according to claim 1, characterized in that, The elastic damping element (2) is an elastic structure made of any one of the following materials: spring, two-way pressure valve, phenolic resin, nylon, modified rubber and acrylate rubber.

4. The shock-absorbing gear according to claim 1, characterized in that, The gear shaft (1) includes a first stepped structure (11), and the first mating surface (12) is located on the first stepped structure; The gear ring (3) includes a second step structure (31), and the second mating surface (32) is located on the second step structure (31); The shock-absorbing gear is a helical gear, the first step structure (11) and the second step structure (31) are engaged, and the first mating surface (12) and the second mating surface (32) face each other along the axial direction of the shock-absorbing gear.

5. The shock-absorbing gear according to claim 4, characterized in that, The gear also includes: a bearing (4) and a first limiting member (41). The gear shaft (1) includes a first cylindrical segment and a second cylindrical segment in sequence along the axial direction, and the connection between the first cylindrical segment and the second cylindrical segment forms the first stepped structure (11). An installation gap is formed between the first cylindrical section and the gear ring (3), and the bearing (4) is fixed to the outer wall of the gear shaft (1) and located in the installation gap; A first annular groove (14) is provided on the side of the first cylindrical segment near the second cylindrical segment. The first limiting member (41) is installed in the first annular groove (14), and the side of the first limiting member (41) away from the bearing (4) abuts against the first step structure (11) and the second step structure (31) to achieve the axial positioning of the gear shaft (1) and the gear ring (3).

6. The shock-absorbing gear according to claim 5, characterized in that, A second annular groove (34) is provided on the side of the first cylindrical segment away from the second cylindrical segment. A second limiting member (42) is installed in the second annular groove (34), and the side of the second limiting member (42) close to the first limiting member (41) abuts against the bearing (4). The first cylindrical segment includes a third step structure (16), which is located on the side of the first cylindrical segment close to the second cylindrical segment. The bearing (4) abuts against the third step structure (16) and the second limiting member (42) on both sides along the axial direction of the gear ring (3), so that the bearing (4) is clamped by the third step structure (16) and the second limiting member (42).

7. A vehicle, characterized in that, Includes the shock-absorbing gear as described in any one of claims 1 to 6.

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