Damping gear assembly structure with high axial bearing capacity
By setting shoulders and three sides between the hub and ring gear, the axial force of the shock absorbing gear assembly structure is solved, and the service life and rotation torque bearing capacity are improved.
Patent Information
- Application Number
- CN202422577276.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-10-24
AI Technical Summary
The existing shock absorbing gear assembly structure has poor ability to withstand axial forces, resulting in a short service life.
The special design of the hub, ring gear and ring gear is adopted, including the arrangement of shoulders on the outside of the hub and the inner side of the ring gear, and the arrangement of three sides with ring gear at the gap, and the contact area is increased by three sides to buffer and offset forces from different directions.
It improves the service life and rotational torque bearing capacity of the shock absorbing gear assembly structure, and is especially suitable for helical gears.
Smart Images
Figure CN223089934U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gears, in particular to a shock-absorbing gear assembly structure with high axial bearing capacity. Background Technique
[0002] For automobiles with engines, especially hybrid vehicles, high requirements are imposed on the running smoothness and low vibration. It is necessary to rely on a balance shaft to reduce the vibration caused by free inertial force and inertia moment. The balance shaft is usually driven by a crankshaft, and the crankshaft is connected to the balance shaft through a gear. In order to reduce the noise of tooth meshing between the balance shaft and the crankshaft and absorb vibration, a shock-absorbing gear assembly structure is usually adopted. The shock-absorbing gear assembly structure includes a hub inside, a ring gear outside, and a rubber ring formed between the outer surface of the hub and the inner surface of the ring gear. Since the middle rubber ring is usually circular, the contact surfaces of the circular rubber ring with the outer surface of the hub and the inner surface of the ring gear are flat or arc-shaped, and its ability to bear axial force is poor.
[0003] It should be noted that the information disclosed in the above background technique section is only used to enhance the understanding of the background of the present disclosure, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Utility Model
[0004] Aiming at the deficiencies of the prior art, an embodiment of the utility model discloses a shock-absorbing gear assembly structure with high axial bearing capacity to solve the problem that the shock-absorbing gear assembly structure has poor ability to bear axial force.
[0005] The technical solution adopted by the utility model is as follows:
[0006] A shock-absorbing gear assembly structure with high axial bearing capacity includes: a hub, which is circular, and a first shoulder is annularly arranged at the first end of the outer surface; a ring gear, which is annular, and a second shoulder is annularly arranged at the second end of the inner surface; an annular member, which is sleeved between the outer side of the hub and the inner side of the ring gear and includes a first side, a second side, and a third side connected in sequence; wherein, the hub, the annular member, and the ring gear are concentrically arranged, there is a first radial gap between the outer surface of the first shoulder and the inner surface of the ring gear, and the first side corresponds to the first radial gap; there is a second radial gap between the inner surface of the second shoulder and the outer surface of the hub, and the third side corresponds to the second radial gap; there is an axial gap between the second end surface of the first shoulder and the first end surface of the second shoulder, and the second side corresponds to the axial gap.
[0007] In a further technical solution, the first shoulder and the second shoulder are square, and chamfering treatment is performed at the edges of the first shoulder and the second shoulder; the first side and the third side are horizontal sides, and the second side is a vertical side.
[0008] A further technical solution is that an axial hole is axially formed at the center of the hub.
[0009] A further technical solution is that annular grooves are formed on the front and rear end surfaces of the hub, and the annular grooves are concentric with the hub.
[0010] A further technical solution is that chamfering treatment is performed at the edges of the axial hole and the annular groove.
[0011] A further technical solution is that helical teeth are annularly arranged on the outer surface of the gear ring.
[0012] A further technical solution is that the annular member is made of vulcanized rubber.
[0013] A further technical solution is that the hub is made of 40Cr steel and has a hardness of 34 - 38HRC after quenching and tempering; the gear ring is made of 16MnCr5 steel and has a hardness of 58 - 62HRC, a case depth of 0.3 - 0.6, and a core hardness of 28 - 48HRC after carburizing and quenching.
[0014] The beneficial effects of the embodiments of the present utility model are as follows:
[0015] (1) The shock-absorbing gear assembly structure with high axial bearing capacity of the present utility model includes a hub, a gear ring, and an annular member. A first shoulder is annularly arranged at the first end of the outer surface of the hub, a second shoulder is annularly arranged at the second end of the inner surface of the gear ring, and the annular member has a first side, a second side, and a third side connected in sequence. The first side is formed in the first radial gap between the outer surface of the first shoulder and the inner surface of the gear ring, the second side is formed in the axial gap between the second end surface of the first shoulder and the first end surface of the second shoulder, and the third side is formed in the second radial gap between the inner surface of the second shoulder and the outer surface of the hub. The annular member with this shape has three sides, which can effectively offset or buffer the forces from different directions, reduce the breaking force received by the rubber itself, and greatly improve the service life of the shock-absorbing gear assembly structure, especially suitable for helical gears.
[0016] (2) Further, the three sides of the annular member increase the contact area with the hub and the gear ring, so that the rotational torque borne by the shock-absorbing gear assembly structure is also improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 Is an axonometric view of the shock-absorbing gear assembly structure of the present utility model.
[0018] Figure 2 Is a schematic structural view of the second end of the shock-absorbing gear assembly structure of the present utility model.
[0019] Figure 3 Is a schematic structural view of the first end of the shock-absorbing gear assembly structure of the present utility model.
[0020] Figure 4 For Figure 2 The sectional view taken along A-A
[0021] In the figure:
[0022] 1. Hub; 11. Axle hole; 12. Groove; 13. First shoulder; 2. Ring gear; 21. Second shoulder; 3. Ring-shaped part; 31. First side; 32. Second side; 33. Third side Detailed implementation manners
[0023] The following combines with the attached drawings to illustrate the detailed implementation manners of the present utility model
[0024] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the following further elaborates on the device proposed by the present utility model in combination with the attached drawings and specific implementation manners. According to the following description, the advantages and features of the present utility model will be clearer. It should be noted that the attached drawings adopt a very simplified form and all use non-precise scales, only for the purpose of facilitating and clearly assisting in explaining the implementation manners of the present utility model. In order to make the purpose, features and advantages of the present utility model more obvious and understandable, please refer to the attached drawings. It should be known that the structures, scales, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Therefore, they do not have technical essence significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed by the present utility model
[0025] Embodiment:
[0026] This embodiment discloses a shock-absorbing gear assembly structure with high axial bearing capacity
[0027] As Figures 1 to 4 shown, the shock-absorbing gear assembly structure includes a hub 1, a ring gear 2 and a ring-shaped part 3
[0028] As Figures 2 to 4 shown, the hub 1 is circular, and a first shoulder 13 is annularly arranged at the first end of the outer surface. Exemplarily, the hub 1 is made of 40Cr steel and has a hardness of 34 - 38 HRC after quenching and tempering
[0029] As Figures 2 to 4 shown, the ring gear 2 is annular, and a second shoulder 21 is annularly arranged at the second end of the inner surface. Exemplarily, the ring gear 2 is made of 16MnCr5 steel, and after carburizing and quenching treatment, the hardness is 58 - 62 HRC, the layer depth is 0.3 - 0.6, and the core hardness is 28 - 48 HRC
[0030] As shown Figure 4 in the figure, the annular member 3 is sleeved between the outer side of the hub 1 and the inner side of the gear ring 2. Exemplarily, rubber is injected between the inner surface of the gear ring 2 and the outer surface of the hub 1, and after molding, it is vulcanized to obtain the annular member 3.
[0031] Among them, the hub 1, the annular member 3 and the gear ring 2 are concentrically arranged. There is a first radial gap between the outer surface of the first shoulder 13 and the inner surface of the gear ring 2, and a second radial gap between the inner surface of the second shoulder 21 and the outer surface of the hub 1. There is an axial gap between the second end surface of the first shoulder 13 and the first end surface of the second shoulder 21. Exemplarily, the annular member 3 formed in the above gap has a first side 31, a second side 32 and a third side 33 connected in sequence. The first side 31 corresponds to the first radial gap between the outer surface of the first shoulder 13 and the inner surface of the gear ring 2, the second side 32 corresponds to the axial gap between the second end surface of the first shoulder 13 and the first end surface of the second shoulder 21, and the third side 33 corresponds to the second radial gap between the inner surface of the second shoulder 21 and the outer surface of the hub 1. Preferably, the first shoulder 13 and the second shoulder 21 are square, and the edges of the first shoulder 13 and the second shoulder 21 are chamfered. The first side 31 and the third side 33 are horizontal sides, and the second side 32 is a vertical side.
[0032] As shown Figures 1 to 4 in the figure, further, an axial hole 11 is opened axially at the center of the hub 1 to connect an external shaft body.
[0033] As shown Figures 1 to 4 in the figure, further, annular grooves 12 are opened on the front and rear end surfaces of the hub 1. The annular grooves 12 are concentrically arranged with the hub 1 to reduce the overall weight on the premise of ensuring a certain strength of the shock-absorbing gear assembly structure. Preferably, the edges of the axial hole 11 and the annular grooves 12 are chamfered.
[0034] Further, helical teeth are annularly arranged on the outer surface of the gear ring 2. The smaller the overlap ratio coefficient of the helical gears, the better they are than spur gear drives in terms of meshing vibration, transmission accuracy and transmission smoothness, etc., but they need to bear a greater axial force. Of course, in other embodiments of the present invention, straight teeth can also be annularly arranged on the outer surface of the gear ring 2. The three sides of the annular member 3 in this embodiment increase the contact area with the hub 1 and the gear ring 2, and can also improve the rotational torque and service life of the spur gear.
[0035] In this embodiment, a first shoulder 13 is annularly provided at the first end of the outer surface of the hub 1, and a second shoulder 21 is annularly provided at the second end of the inner surface of the gear ring 2. The annular member 3 has a first side 31, a second side 32, and a third side 33 that are sequentially connected. The first side 31 is formed in a first radial gap between the outer surface of the first shoulder 13 and the inner surface of the gear ring 2, the second side 32 is formed in an axial gap between the second end surface of the first shoulder 13 and the first end surface of the second shoulder 21, and the third side 33 is formed in a second radial gap between the inner surface of the second shoulder 21 and the outer surface of the hub 1. The annular member 3 with this shape has three sides, which can effectively offset or buffer forces from different directions, reduce the breaking force on the rubber itself, and greatly improve the service life of the shock-absorbing gear assembly structure, especially suitable for helical gears.
[0036] At the same time, the three sides of the annular member 3 with this shape increase the contact area with the hub 1 and the gear ring 2, so that the rotational torque carried by the shock-absorbing gear assembly structure is also improved.
[0037] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.
[0038] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.
Claims
1. A shock-absorbing gear assembly structure with high axial bearing capacity, characterized in that, Including: A hub (1), which is circular, and a first shoulder (13) is annularly arranged at the first end of the outer surface; A gear ring (2), which is annular, and a second shoulder (21) is annularly arranged at the second end of the inner surface; An annular member (3), which is sleeved between the outer side of the hub (1) and the inner side of the gear ring (2), and includes a first side (31), a second side (32) and a third side (33) connected in sequence; Wherein, the hub (1), the annular member (3) and the gear ring (2) are concentrically arranged. There is a first radial gap between the outer surface of the first shoulder (13) and the inner surface of the gear ring (2), and the first side (31) corresponds to the first radial gap; there is a second radial gap between the inner surface of the second shoulder (21) and the outer surface of the hub (1), and the third side (33) corresponds to the second radial gap; there is an axial gap between the second end surface of the first shoulder (13) and the first end surface of the second shoulder (21), and the second side (32) corresponds to the axial gap.
2. The structure of a shock-absorbing gear assembly with high axial bearing capacity according to claim 1, wherein: The first shoulder (13) and the second shoulder (21) are square, and chamfering is performed at the edges of the first shoulder (13) and the second shoulder (21); the first side (31) and the third side (33) are horizontal sides, and the second side (32) is a vertical side.
3. The structure of a shock-absorbing gear assembly with high axial bearing capacity according to claim 1, characterized in that: An axial hole (11) is axially opened at the center of the hub (1).
4. A shock-absorbing gear assembly structure with high axial bearing capacity according to claim 3, characterized in that: Circular grooves (12) are opened on the front and rear end surfaces of the hub (1), and the circular grooves (12) are concentric with the hub (1).
5. A shock-absorbing gear assembly structure with high axial bearing capacity according to claim 4, characterized in that: Chamfering is performed at the edges of the axial hole (11) and the circular grooves (12).
6. The structure of a shock-absorbing gear assembly with high axial bearing capacity according to claim 1, characterized in that: Helical teeth are annularly arranged on the outer surface of the gear ring (2).
7. A shock-absorbing gear assembly structure with high axial bearing capacity according to claim 1, characterized in that: The annular member (3) is made of vulcanized rubber.
8. A shock-absorbing gear assembly structure with high axial bearing capacity according to claim 1, characterized in that: The hub (1) is made of 40Cr steel, and the hardness is 34 - 38HRC after quenching and tempering; the gear ring (2) is made of 16MnCr5 steel, and the hardness is 58 - 62HRC after carburizing and quenching, the layer depth is 0.3 - 0.6, and the core hardness is 28 - 48HRC.