Buffering gear assembly, transmission shaft assembly and gear shifting mechanism

Abstract

The utility model discloses a buffering gear assembly, a transmission shaft assembly and a gear shifting mechanism, and the buffering gear assembly comprises a gear, a buffering piece and a connecting piece; the buffering piece is arranged on the connecting piece in a sleeving mode, and the gear is arranged on the buffering piece in a sleeving mode. The connecting piece is used for connecting a transmission shaft; and the buffer piece can generate elastic deformation to absorb the impact of the gear. Damage of the gear and the transmission shaft under the working conditions of frequent gear shifting and large gear shifting force can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission, and in particular to a buffer gear assembly, a transmission shaft assembly, and a shifting mechanism. Background Technology

[0002] In the field of mechanical transmission, the gear shifting mechanism is a core component for power transmission and speed control, widely used in automotive gearboxes, industrial equipment transmission systems, and other fields. In traditional gear shifting mechanisms, gears and drive shafts often employ a rigid connection, such as circumferential fixation via splines. However, under conditions of frequent gear shifts and large shifting forces, the impact force generated during gear meshing is directly transmitted to the drive shaft, easily causing cracks at the spline root, gear spokes, and other locations. This reduces the service life of both the gears and the drive shaft.

[0003] Therefore, it is particularly necessary to provide a new gear assembly to overcome the damage to gears and drive shafts under frequent gear shifting conditions. Utility Model Content

[0004] The purpose of this utility model is to provide a buffer gear assembly, a transmission shaft assembly, and a shifting mechanism to address the aforementioned problems, which can prevent damage to the gears and transmission shaft under conditions of frequent shifting and large shifting forces.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A buffer gear assembly, characterized in that: it includes a gear, a buffer element, and a connecting element; the buffer element is sleeved on the connecting element, and the gear is sleeved on the buffer element; the connecting element is used to connect a drive shaft; the buffer element is capable of elastic deformation to absorb the impact of the gear.

[0007] Furthermore, the buffer is made of plastic, and the connector is made of metal.

[0008] Furthermore, a gear assembly hole is provided in the middle of the gear, and a plurality of gear assembly flanges are provided in the gear assembly hole;

[0009] The connector has a connector assembly hole in the middle and a plurality of connector assembly flanges on the outer surface of the connector.

[0010] The buffer component has a buffer component assembly hole in the middle and an outer assembly groove on the outer edge of the buffer component. The number of the outer assembly grooves is equal to the number of the gear assembly flanges. An inner assembly groove is formed in the buffer component assembly hole. The number of the inner assembly grooves is equal to the number of the connecting component assembly flanges. The shape of the gear assembly flange matches the shape of the outer assembly groove, and the shape of the connecting component assembly flange matches the shape of the inner assembly groove.

[0011] The mounting hole of the connector is used to connect the drive shaft;

[0012] The buffer is fitted onto the connector through the buffer assembly hole, and the connector assembly flange is assembled in the inner assembly groove.

[0013] The gear is fitted onto the buffer through the gear assembly hole, and the gear assembly flange is assembled in the outer assembly groove.

[0014] Furthermore, the buffer component includes a circular base plate, with the buffer component assembly hole located at the center of the base plate; several partitions are provided on the surface of the base plate, with the partitions evenly spaced around the buffer component assembly hole to form several assembly grooves on the base plate; several outer baffles matching the shape of the outer edge of the base plate and several inner baffles matching the shape of the buffer component assembly hole are provided on the base plate; the inner and outer baffles are staggered and located at different assembly grooves; the outer baffle is located at the outer edge of the base plate, sealing the assembly groove near the outer edge of the base plate, so that the space enclosed by the outer baffle and the assembly groove constitutes the inner assembly groove; the inner baffle is located at the buffer component assembly hole, sealing the assembly groove near the buffer component assembly hole, so that the space enclosed by the inner baffle and the assembly groove constitutes the outer assembly groove.

[0015] Furthermore, both the gear assembly flange and the connector assembly flange are stepped flanges; the inner baffle and the outer baffle have the same height, and both are less than the height of the separator; when the gear is fitted onto the buffer and the buffer is fitted onto the connector, a portion of the gear assembly flange is located in the outer assembly groove and contacts the bottom plate, while the other portion covers the top of the inner baffle and contacts the outer edge of the connector; a portion of the connector assembly flange is located in the inner assembly groove and contacts the bottom plate, while the other portion covers the top of the outer baffle and contacts the gear assembly hole.

[0016] Furthermore, the separator has an arc-shaped chamfer between one end near the outer edge of the base plate and the side of the separator; the separator has an arc-shaped chamfer between one end near the buffer assembly hole and the side of the separator; the outer baffle has an arc-shaped chamfer between the outer baffle and the side of the separator; and the inner baffle has an arc-shaped chamfer between the inner baffle and the side of the separator.

[0017] Furthermore, an arc-shaped chamfer is formed between the side surface of the gear assembly flange and the gear assembly hole; an arc-shaped chamfer is formed between the side surface of the gear assembly flange and the end face of the gear assembly flange; an arc-shaped chamfer is formed between the side surface of the connector assembly flange and the outer surface of the connector; and an arc-shaped chamfer is formed between the side surface of the connector assembly flange and the end face of the connector assembly flange.

[0018] Furthermore, a spline groove is provided in the assembly hole of the connector.

[0019] This utility model also discloses a transmission shaft assembly, which includes a transmission shaft and the aforementioned buffer gear assembly. The connecting member assembly hole is connected to the transmission shaft via a spline connection. Two limiting baffles are sleeved on the transmission shaft. The limiting baffles are located at both ends of the gear and are used to restrict the axial movement of the gear, buffer member, and connecting member. An elastic retaining ring is also sleeved on the transmission shaft. The elastic retaining ring is located on the side of the limiting baffle away from the gear.

[0020] This utility model also discloses a gear shifting mechanism, which includes the aforementioned drive shaft assembly.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0022] In this invention, due to the presence of the buffer component, the impact force generated during gear meshing can be absorbed by the buffer component under conditions of frequent gear shifting and large shifting forces, reducing the impact force between the gear and the shaft and preventing damage to the gear and shaft. The buffer component and the connecting component constitute a split buffer mechanism. The metal connecting component ensures rigid force transmission accuracy, while the buffer component focuses on elastic deformation to absorb energy. The buffer component is made of plastic, which can efficiently absorb impact energy through elastic deformation. The plastic component has the advantages of impact resistance, noise reduction, and extended service life. At the same time, the one-piece molding process can significantly reduce manufacturing costs. Attached Figure Description

[0023] Figure 1 This is an exploded view of the buffer gear assembly;

[0024] Figure 2 and Figure 3 Here is a structural diagram of the gear;

[0025] Figure 4 and Figure 5 Here is a structural diagram of the buffer component;

[0026] Figure 6 and 7 This is a structural diagram of the connector;

[0027] Figure 8 This is an assembly drawing of the gear and the buffer component;

[0028] Figure 9 Assembly drawing for buffer components and connectors;

[0029] Figure 10 Assembly drawings for gears, buffer components, and connecting parts;

[0030] Figure 11 A diagram showing the clearances between gears, buffer components, and connecting parts;

[0031] Figure 12 This is an exploded view of the drive shaft assembly;

[0032] In the diagram, 1-drive shaft, 2-limiting baffle, 3-buffer, 4-gear, 5-connector, 6-elastic retaining ring, 301-outer mounting groove, 302-outer baffle, 303-inner baffle, 304-inner mounting groove, 305-separator, 306-buffer mounting hole, 307-base plate, 401-gear mounting hole, 402-gear mounting flange, 4021-side of gear mounting flange, 4022-end face of gear mounting flange, 501-connector mounting flange, 5011-end face of connector mounting flange, 5012-side of connector mounting flange. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0035] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example 1

[0039] like Figures 1-12 As shown, a buffer gear assembly includes a gear 4, a buffer element 3, and a connecting element 5. The buffer element 3 is sleeved on the connecting element 5, and the gear 4 is sleeved on the buffer element 3. The connecting element 5 is used to connect a drive shaft 1. The buffer element 3 is capable of elastic deformation to absorb the impact of the gear 4. The buffer element 3 is made of plastic, and the connecting element 5 is made of metal.

[0040] Due to the presence of buffer 3, the impact force generated by gear 4 during frequent gear shifting can be absorbed by buffer 3, reducing the impact force between gear 4 and the shaft and preventing damage to gear 4 and the shaft. Buffer 3 and connecting part 5 constitute a split buffer mechanism. The metal connecting part 5 ensures rigid force transmission accuracy, while buffer 3 focuses on elastic deformation to absorb energy. Buffer 3 is made of plastic, which can efficiently absorb impact energy through elastic deformation. Plastic parts have the advantages of impact resistance, noise reduction, and extended service life. At the same time, the one-piece molding process can significantly reduce manufacturing costs.

[0041] Furthermore, a gear assembly hole 401 is provided in the middle of the gear 4, and a plurality of gear assembly flanges 402 are provided in the gear assembly hole 401, such as... Figure 3 As shown, there are three gear mounting flanges 402; the connector 5 has a mounting hole in the middle, and several mounting flanges 501 are provided on the outer surface of the connector 5; as shown Figure 6 As shown, there are three connecting flanges 501; the buffer 3 has a buffer assembly hole 306 in the middle, and an outer mounting groove 301 on the outer edge of the buffer 3. The number of outer mounting grooves 301 is equal to the number of gear assembly flanges 402. An inner mounting groove 304 is formed in the buffer assembly hole 306. The number of inner mounting grooves 304 is equal to the number of connecting flanges 501. The shape of the gear assembly flange 402 matches the shape of the outer mounting groove 301, and the shape of the connecting flange 501 matches the shape of the inner mounting groove 304. The connecting member 5 has an assembly hole for connecting the drive shaft 1. The buffer 3 is fitted onto the connecting member 5 through the buffer assembly hole 306, and the connecting flange 501 is fitted into the inner mounting groove 304. The gear 4 is fitted onto the buffer 3 through the gear assembly hole 401, and the gear assembly flange 402 is fitted into the outer mounting groove 301.

[0042] In the above structure, the precise fit between the protrusions and grooves on gear 4, connector 5, and buffer 3 allows the impact force to be buffered and absorbed, preventing damage to parts. Simultaneously, the components can be quickly aligned and installed, making maintenance and replacement more convenient. The fit between the protrusions and grooves also ensures accurate force transmission.

[0043] Furthermore, the specific structure of the buffer 3 can be configured as follows:

[0044] like Figure 4 As shown, the buffer 3 includes a circular base plate 307, and the buffer assembly hole 306 is opened at the center of the base plate 307; a plurality of partitions 305 are provided on the surface of the base plate 307, and the partitions 305 are equally spaced around the buffer assembly hole 306, so that a plurality of assembly grooves are formed on the base plate 307; as shown Figure 4 As shown, there are 6 assembly slots; the base plate 307 is provided with a plurality of outer baffles 302 that match the shape of the outer edge of the base plate 307 and a plurality of inner baffles 303 that match the shape of the buffer assembly holes 306, as shown. Figure 4 As shown, there are three inner baffles 303 and three outer baffles 302; the inner baffles 303 and outer baffles 302 are staggered and located in different assembly slots, that is, the inner baffles 303 and outer baffles 302 cannot appear in the same assembly slot at the same time; the outer baffles 302 are located at the outer edge of the base plate 307, and the sealing assembly slot is located near the outer edge of the base plate 307, so that the space enclosed by the outer baffles 302 and the assembly slot constitutes the inner assembly slot 304; the inner baffles 303 are located at the buffer component assembly hole 306, and the sealing assembly slot is located near the buffer component assembly hole 306, so that the space enclosed by the inner baffles 303 and the assembly slot constitutes the outer assembly slot 301.

[0045] In this utility model, the design of the buffer 3, including the partition plate, inner baffle 303, and outer baffle 302, can disperse the impact force to multiple areas for absorption, making the parts more durable. During installation, each part can be easily aligned and clamped, and during maintenance, it is also convenient to disassemble and replace.

[0046] Furthermore, such as Figure 3 , 4 As shown in Figure 6, both the gear assembly flange 402 and the connecting member assembly flange 501 are stepped flanges; the inner baffle 303 and the outer baffle have the same height, and both are less than the height of the separator 305; when the gear 4 is sleeved on the buffer 3 and the buffer 3 is sleeved on the connecting member 5, as... Figure 10 As shown, a portion of the gear mounting flange 402 is located in the outer mounting groove 301 and contacts the base plate 307, while the other portion covers the top of the inner baffle 303 and contacts the outer edge of the connector 5; a portion of the connector mounting flange 501 is located in the inner mounting groove 304 and contacts the base plate 307, while the other portion covers the top of the outer baffle 302 and contacts the gear mounting hole 401.

[0047] If the flange is not stepped, and the heights of the inner baffle 303 and the outer baffle are the same as the separator 305, then the gear 4 and the connecting piece 5 will be completely separated by the buffer 3, and there will be no rigid support between the gear 4 and the connecting piece 5. However, if the flange is stepped, and the heights of the inner baffle 303 and the outer baffle are less than the separator 305, then the gear 4 and the connecting piece 5 can have partial direct contact, providing rigid support. While ensuring shock absorption, it can also support the overall structure like a "skeleton," preventing parts from shaking, and making power transmission more stable and durable. At the same time, the gear 4 and the connecting piece 5 abut against each other, ensuring the coaxiality of the drive shaft 1 and the gear 4.

[0048] like Figure 3 , 4 As shown in Figures 6 and 10, an arc-shaped chamfer is formed between one end of the separator 305 near the outer edge of the base plate 307 and the side of the separator 305; an arc-shaped chamfer is formed between one end of the separator 305 near the buffer assembly hole 306 and the side of the separator 305; an arc-shaped chamfer is formed between the outer baffle 302 and the side of the separator 305; and an arc-shaped chamfer is formed between the inner baffle 303 and the side of the separator 305.

[0049] An arc-shaped chamfer is formed between the side surface 4021 of the gear assembly flange and the gear assembly hole 401; an arc-shaped chamfer is formed between the side surface 4021 of the gear assembly flange and the end face 4022 of the gear assembly flange; an arc-shaped chamfer is formed between the side surface 5012 of the connector assembly flange and the outer surface of the connector 5; an arc-shaped chamfer is formed between the side surface 5012 of the connector assembly flange and the end face 5011 of the connector assembly flange.

[0050] like Figure 11 As shown, due to the presence of the arc chamfer, the connecting flange 501, the gear flange 402 and the buffer 3 will have an assembly gap at the arc chamfer. This gap can eliminate the impact and at the same time ensure that the buffer 3 can undergo elastic deformation.

[0051] Furthermore, the connecting member 5 has a spline groove in its mounting hole. It can be connected to the drive shaft 1 via a spline connection. Example 2

[0052] like Figure 12 As shown, this utility model also discloses a transmission shaft assembly, which includes a transmission shaft 1 and the buffer gear assembly described in Embodiment 1. The mounting hole of the connecting member 5 is connected to the transmission shaft 1 by a spline connection. Two limiting baffles 2 are sleeved on the transmission shaft 1. The limiting baffles 2 are located at both ends of the gear 4 and are used to restrict the axial movement of the gear 4, the buffer member 3 and the connecting member 5. An elastic retaining ring 6 is also sleeved on the transmission shaft 1. The elastic retaining ring 6 is located on the side of the limiting baffles 2 away from the gear 4. Example 3

[0053] This utility model also discloses a shifting mechanism, which includes the drive shaft assembly in Embodiment 2.

[0054] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A buffer gear assembly, characterized in that: It includes a gear (4), a buffer (3), and a connector (5); The buffer (3) is sleeved on the connector (5), and the gear (4) is sleeved on the buffer (3); The connector (5) is used to connect the drive shaft (1); The buffer (3) can undergo elastic deformation to absorb the impact of the gear (4).

2. The buffer gear assembly according to claim 1, characterized in that: The buffer (3) is made of plastic, and the connector (5) is made of metal.

3. The buffer gear assembly according to claim 2, characterized in that: The gear (4) has a gear assembly hole (401) in the middle, and a plurality of gear assembly flanges (402) are provided in the gear assembly hole (401). The connector (5) has an assembly hole in the middle and a plurality of assembly flanges (501) are provided on the outer surface of the connector (5). The buffer (3) has a buffer assembly hole (306) in the middle and an outer assembly groove (301) on the outer edge of the buffer (3). The number of outer assembly grooves (301) is equal to the number of gear assembly flanges (402). An inner assembly groove (304) is provided in the buffer assembly hole (306). The number of inner assembly grooves (304) is equal to the number of connecting member assembly flanges (501). The shape of the gear assembly flange (402) matches the shape of the outer assembly groove (301), and the shape of the connecting member assembly flange (501) matches the shape of the inner assembly groove (304). The mounting hole of the connector (5) is used to connect the drive shaft (1); The buffer (3) is sleeved on the connector (5) through the buffer assembly hole (306), and the connector assembly flange (501) is assembled in the inner assembly groove (304); The gear (4) is fitted onto the buffer (3) through the gear assembly hole (401), and the gear assembly flange (402) is assembled in the outer assembly groove (301).

4. The buffer gear assembly according to claim 3, characterized in that: The buffer (3) includes a circular base plate (307), and the buffer assembly hole (306) is opened at the center of the base plate (307); The base plate (307) is provided with a plurality of partitions (305), which are arranged at equal intervals around the buffer assembly hole (306) to form a plurality of assembly grooves on the base plate (307). The base plate (307) is provided with a plurality of outer baffles (302) that match the shape of the outer edge of the base plate (307) and a plurality of inner baffles (303) that match the shape of the buffer assembly hole (306). The inner baffle (303) and the outer baffle (302) are staggered and located in different assembly slots; The outer baffle (302) is located at the outer edge of the bottom plate (307), and the sealing assembly groove is located near the outer edge of the bottom plate (307), so that the space enclosed by the outer baffle (302) and the assembly groove constitutes the inner assembly groove (304). The inner baffle (303) is provided at the buffer assembly hole (306), and the sealing assembly groove is located near the end of the buffer assembly hole (306), so that the space enclosed by the inner baffle (303) and the assembly groove constitutes the outer assembly groove (301).

5. The buffer gear assembly according to claim 4, characterized in that: Both the gear assembly flange (402) and the connector assembly flange (501) are stepped flanges; The inner baffle (303) and the outer baffle have the same height, and both are less than the height of the separator (305); When the gear (4) is fitted onto the buffer (3) and the buffer (3) is fitted onto the connector (5), a portion of the gear mounting flange (402) is located in the outer mounting groove (301) and contacts the base plate (307), while the other portion covers the top of the inner baffle (303) and contacts the outer edge of the connector (5); a portion of the connector mounting flange (501) is located in the inner mounting groove (304) and contacts the base plate (307), while the other portion covers the top of the outer baffle (302) and contacts the gear mounting hole (401).

6. The buffer gear assembly according to claim 5, characterized in that: An arc-shaped chamfer is provided between one end of the separator (305) near the outer edge of the base plate (307) and the side of the separator (305); The separator (305) has an arc-shaped chamfer between the end near the buffer assembly hole (306) and the side of the separator (305); An arc-shaped chamfer is provided between the outer baffle (302) and the side of the separator (305); An arc-shaped chamfer is provided between the inner baffle (303) and the side of the separator (305).

7. The buffer gear assembly according to claim 6, characterized in that: An arc-shaped chamfer is provided between the side surface (4021) of the gear assembly flange and the gear assembly hole (401); an arc-shaped chamfer is provided between the side surface (4021) of the gear assembly flange and the end face (4022) of the gear assembly flange. The side surface (5012) of the connecting flange and the outer surface of the connecting member (5) are provided with an arc-shaped chamfer, and the side surface (5012) of the connecting flange and the end face (5011) of the connecting flange are provided with an arc-shaped chamfer.

8. The buffer gear assembly according to claim 3, characterized in that: The connector (5) has a spline groove in the assembly hole.

9. A drive shaft assembly, characterized in that: It includes a drive shaft (1) and a buffer gear assembly as described in any one of claims 1 to 8, wherein the mounting hole of the connector (5) is connected to the drive shaft (1) by a spline connection; two limiting baffles (2) are sleeved on the drive shaft (1), the limiting baffles (2) are located at both ends of the gear (4) and are used to restrict the axial movement of the gear (4), the buffer (3) and the connector (5); an elastic retaining ring (6) is also sleeved on the drive shaft (1), the elastic retaining ring (6) is located on the side of the limiting baffles (2) away from the gear (4).

10. A gear shifting mechanism, characterized in that: It includes the drive shaft assembly as described in claim 9.

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