Gear shifting executing mechanism and transmission

Abstract

The utility model relates to a gear shifting executing mechanism and a transmission, and belongs to the technical field of transmission gear shifting, the gear shifting executing mechanism comprises a gear shifting shell, a gear shifting motor, a transmission assembly and a gear shifting poking finger, and the gear shifting motor is connected to the gear shifting shell; the transmission assembly comprises a first shaft, a second shaft and a third shaft which are rotationally connected to the interior of the gear shifting shell, the first shaft is fixedly connected to an output shaft of the gear shifting motor, the second shaft is fixedly connected with a large gear, the large gear is meshed with the first shaft, the third shaft is fixedly connected with a sector gear, and the sector gear is meshed with the second shaft; and the gear shifting poking finger is connected to the fan-shaped teeth. According to the gear shifting executing mechanism, the accuracy and stability of power transmission can be improved, the overall structure is more compact, abrasion to the shaft end can be effectively reduced, and noise can be reduced; meanwhile, the requirement for precision control of the gear shifting motor is low, and the cost can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of transmission shifting technology, specifically a shifting actuator and a transmission. Background Technology

[0002] Electric gear shift actuators are components that control the gear changes of a car's transmission by shifting gears, and are currently widely used in the electric vehicle field. Existing gear shift actuators typically use a shift motor to control the shift paddle's movement through a transmission structure to achieve gear shifting. For example, utility model patent CN215763231U discloses a parking actuator. This parking actuator receives shift paddle commands from the vehicle's automatic transmission via a shift motor, and through the rotation of an integrated large gear, drives an integrated small gear shaft to rotate to the same angle, thereby driving the rotation of a secondary transmission sector gear. Through the secondary transmission shaft, the shift paddle rotates to the same angle as the secondary transmission sector gear. In this design, the shift paddle and the secondary transmission sector gear are arranged side-by-side separately. The primary transmission small gear shaft needs to be of sufficient length to match the assembly or movement space of the shift paddle and the secondary transmission sector gear; however, an excessively long gear shaft would increase the stress and wear on the shaft end. Utility Model Content

[0003] The purpose of this invention is to provide a shifting actuator and a transmission that can solve the technical problems mentioned in the background section.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] This utility model provides a gear shifting actuator, including a gear shifting housing, a gear shifting motor and a transmission assembly, and a gear shifting finger. The gear shifting motor is connected to the gear shifting housing. The transmission assembly includes a first shaft, a second shaft, and a third shaft rotatably connected inside the gear shifting housing. The first shaft is fixedly connected to the output shaft of the gear shifting motor. The second shaft is fixedly connected to a large gear, which meshes with the first shaft. The third shaft is fixedly connected to a sector tooth, which meshes with the second shaft. The gear shifting finger is connected to the sector tooth.

[0006] In a preferred embodiment, the shift finger is integrally connected to the side end of the sector teeth. This integral connection ensures the accuracy and stability of power transmission, while making the shift actuator more compact and reducing wear on the shaft connection end.

[0007] In a preferred embodiment, the third shaft is fixedly provided with a mounting step, and the sector-shaped gear is sleeved on the third shaft and connected to the mounting step. This installation method is simple and reliable, and its stability is better than traditional pin-type installation methods.

[0008] In a preferred embodiment, the shift actuator further includes a shift position sensor connected to the end of the third shaft. The shift position sensor determines the gear position signal by detecting the rotation angle of the third shaft.

[0009] In a preferred embodiment, the shift housing is further connected to a limiting member on the side corresponding to the sector teeth, the limiting member being used to limit the movement range of the sector teeth. This structure can reduce the precision control requirements of the shift motor, thereby reducing control costs.

[0010] In a preferred embodiment, the sector teeth are fixed with two raised partitions at one end facing the limiting member, and the limiting member extends between the two partitions.

[0011] In a preferred embodiment, the gear module of the large gear is set between 1.0 and 1.5. This setting improves the overall compactness of the shift actuator, making it more delicate and refined, while also meeting the transmission accuracy requirements of the shift actuator.

[0012] In a preferred embodiment, the plane containing the mounting plane is taken as the Y direction, and the other plane perpendicular to the mounting plane is taken as the X direction. In the Y direction, the first axis is disposed between the second axis and the third axis, and in the X direction, the second axis is disposed between the first axis and the third axis.

[0013] In a preferred embodiment, the point projected onto the Y-axis by the first axis is Y1, the point projected onto the Y-axis by the second axis is Y2, and the point projected onto the Y-axis by the third axis is Y3. There is a first distance L1 between Y1 and Y2, and a second distance L2 between Y1 and Y3, with L1:L2=1:(1.5-1.8). The point projected onto the X-axis by the first axis is X1, the point projected onto the X-axis by the second axis is X2, and the point projected onto the X-axis by the third axis is X3. There is a third distance L3 between X1 and X2, and a fourth distance L4 between X2 and X3, with L3:L4=(7-7.5):1.

[0014] In another aspect, this utility model provides a transmission, including the shifting actuator described in any of the above embodiments.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. The shifting actuator provided by this utility model, by setting a three-axis transmission structure and the orientation limitation of the three axes, and by integrally connecting the shifting finger to the side end of the sector tooth, can not only improve the accuracy and stability of power transmission, but also make the structure of the actuator more compact, reduce wear on the shaft end, and reduce noise.

[0017] 2. By setting a limiting component to restrict the movement range of the sector teeth, the rotation amplitude of the sector teeth can be reduced, thereby reducing the precision control requirements of the shift motor;

[0018] 3. By setting the module and gear ratio of the large gear in the transmission component, the overall compactness of the shift actuator can be further improved, making it more delicate and refined, and effectively improving the vehicle's NVH. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the gear shifting actuator in an embodiment of the present utility model;

[0020] Figure 2 This is a top view of the transmission assembly in an embodiment of the present utility model;

[0021] Figure 3 This is a right view of the transmission component in an embodiment of this utility model;

[0022] Figure 4 This is a schematic diagram of the orientation distribution of the three axes in an embodiment of this utility model.

[0023] The meanings of the labels in the diagram are as follows:

[0024] 1. Shift housing; 2. Shift motor; 3. Transmission assembly; 31. First shaft; 32. Large gear; 33. Second shaft; 331. Gear end; 34. Third shaft; 341. Mounting step; 35. Sector gear; 351. Spacing; 4. Shift finger; 5. Shift position sensor; 6. Limiting component. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only 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.

[0027] Example 1

[0028] See Figures 1-3 This embodiment discloses a gear shifting actuator, including a gear shift housing 1 and a gear shift motor 2, a transmission assembly 3, and a gear shift finger 4 connected through the gear shift housing 1. The gear shift motor 2 is fixedly connected to the outside of the gear shift housing 1, and its output shaft passes through the gear shift housing 1 and is connected to the transmission assembly 3 disposed inside the gear shift housing 1. The gear shift finger 4 is connected to the transmission assembly 3. The gear shift motor 2 controls the movement of the transmission assembly 3, which in turn acts on the gear shift finger 4, causing the gear shift finger 4 to control the movement of the gear shift fork.

[0029] like Figure 2 As shown, the transmission assembly 3 includes a first shaft 31 fixedly connected to the output shaft of the shift motor 2 and a large gear 32 connected thereto. Both ends of the first shaft 31 are rotatably connected to the shift housing 1 via bearings. In this embodiment, the first shaft 31 is preferably a gear shaft, which meshes with the large gear 32. It is understood that in other embodiments not shown, the first shaft 31 may also have a structure in which a shaft body and another transmission gear are fixedly engaged, driving the large gear 32 to rotate via the transmission gear.

[0030] The transmission assembly 3 also includes a second shaft 33 and a third shaft 34 rotatably connected to the shift housing 1 via bearings, both of which are parallel to the first shaft 31. A large gear 32 is fixedly mounted on the second shaft 33. In this embodiment, the second shaft 33 is preferably a gear shaft. The transmission assembly 3 further includes a sector tooth 35 meshing with the gear end 331 of the second shaft 33, which is fixedly connected to the third shaft 34. That is, the rotation of the large gear 32 drives the second shaft 33 to rotate, thereby causing the sector tooth 35 and the third shaft 34 to rotate synchronously.

[0031] It should be noted that in this embodiment, the shift finger 4 is fixedly connected to the side end of the sector tooth 35. The sector tooth 35 can drive the shift finger 4 to move synchronously. The non-parallel distribution of the two can reduce space occupation and improve the compactness of the mechanism. Preferably, the shift finger 4 and the sector tooth 35 are integrally formed, with the shift finger 4 extending integrally from the side end of the sector tooth 35 to the distal end. This structure can ensure the accuracy and stability of its power transmission. At the same time, the integral connection structure of the shift finger 4 and the sector tooth 35 can make the structure of the shift actuator more compact, and can also reduce wear on the shaft connection end and reduce noise.

[0032] Specifically, for the second shaft 33, the large gear 32 connected to it and its own inherent small gear (gear end 331) engage in transmission. Uneven force distribution on the large and small gears can lead to shaft deformation, which in turn affects the load distribution of the bearings at both ends of the second shaft 33, causing abnormal wear. Shortening the length of the second shaft 33 increases its rigidity, significantly reduces its bending deformation, and allows the radial and axial forces generated by gear meshing to be transmitted more evenly to the bearing support points. This reduces shaft deflection caused by uneven force distribution on the large and small gears and alleviates the load difference between the bearings at both ends. In this embodiment, the second shaft 33 only needs to reserve assembly space for the sector gear 35 outside the mounting position of the large gear 32. This assembly space is smaller than the space occupied by the existing sector gear 35 and shift finger 4 arranged side by side, allowing the second shaft 33 to meet the installation space requirements with a shorter length, thereby reducing wear on the shaft end. For the third shaft 34, only the installation space for the sector gear 35 needs to be reserved, further improving the compactness of the structure.

[0033] like Figure 3 As shown, to facilitate the installation of the sector tooth 35, the third shaft 34 is fixed with an installation step 341 at approximately the middle position. During installation, the sector tooth 35 is fitted onto the third shaft 34 and placed against the installation step 341. It is then fixed to the installation step 341 using screws or other fasteners. This installation method is simple and reliable, and its stability is better than that of traditional pin installation methods.

[0034] See Figure 1 In this embodiment, the shift actuator further includes a shift position sensor 5, which is connected to the third shaft 34. Correspondingly, one end of the third shaft 34 extends out of the shift housing 1, and the shift position sensor 5 is connected to the extending end of the third shaft 34. Because the third shaft 34, the sector gear 35, and the shift finger 4 rotate synchronously, the shift position sensor 5 determines the gear position signal by detecting the rotation angle of the third shaft 34.

[0035] Example 2

[0036] The shifting actuator provided in this embodiment has a roughly the same structure as the shifting actuator provided in Embodiment 1. Therefore, for the sake of brevity, only the differences will be described in detail here.

[0037] The shifting actuator provided in this embodiment also includes a limiting member 6 for limiting the movement range of the sector teeth 35, such as... Figure 1 and Figure 3As shown, the limiting member 6 is fixedly connected to the shift housing 1 on the side corresponding to the sector tooth 35. Correspondingly, the sector tooth 35 has two protruding partitions 351 fixed at one end facing the limiting member 6, and the limiting member 6 extends between the two partitions 351, limiting the movement range of the sector tooth 35 through its cooperation with the two partitions 351. For example, the limiting member 6 can be a limiting screw, pin, or other structure.

[0038] In this embodiment, by setting a limiting member 6 to limit the movement range of the sector tooth 35 and the shift finger 4 integrally connected thereto, the rotation amplitude is reduced, which can reduce the precision control requirements of the shift motor 2 and thus reduce the control cost. Example

[0039] The shifting actuator provided in this embodiment has a roughly the same structure as the shifting actuator provided in Embodiment 1. Therefore, for the sake of brevity, only the differences will be described in detail here.

[0040] In this embodiment, the large gear 32 connected to the second shaft 33 has a gear module between 1.0 and 1.5. The radius ratio of the large gear 32 to the small gear of the first shaft 31 is set to (3-4):1. This setting can improve the overall compactness of the shifting actuator, making it more delicate and refined. On the other hand, the tooth surface contact area of ​​the gear with this module is relatively uniform, the energy loss fluctuation caused by friction is small, and the single tooth bearing pressure is small, which can meet the requirements of the shifting actuator for transmission accuracy.

[0041] Example 3

[0042] The shifting actuator provided in this embodiment has a roughly the same structure as the shifting actuator provided in Embodiment 1. Therefore, for the sake of brevity, only the differences will be described in detail here.

[0043] See Figure 4 With the plane where the mounting plane is located as the Y direction and the other side perpendicular to the mounting plane as the X direction, in the Y direction, the first axis 31 is set between the second axis 33 and the third axis 34, and in the X direction, the second axis 33 is set between the first axis 31 and the third axis 34.

[0044] Specifically, the point on the Y-axis projected by the first axis 31 is Y1, the point on the Y-axis projected by the second axis 33 is Y2, and the point on the Y-axis projected by the third axis 34 is Y3. Y1 is located between Y2 and Y3. There is a first distance L1 between Y1 and Y2 and a second distance L2 between Y1 and Y3. L1:L2=1:(1.5-1.8).

[0045] The point on the X-axis projected by the first axis 31 is X1, the point on the X-axis projected by the second axis 33 is X2, and the point on the X-axis projected by the third axis 34 is X3. X2 is located between X1 and X3. There is a third distance L3 between X1 and X2, and a fourth distance L4 between X2 and X3. L3:L4 = (7-7.5):1.

[0046] By defining the positions of the first axis 31, the second axis 33, and the third axis 34 as described above, space can be utilized efficiently, further improving the compactness of the structure and facilitating installation. At the same time, the transmission path can be shortened, reducing energy loss in power transmission. On the other hand, the cross-nested layout in the X and Y directions can reduce the risk of deformation caused by uneven stress on a single axis.

[0047] The shift actuator provided by this utility model, through the setting of a three-axis transmission structure and the limitation of the three-axis positions, and the integrated connection of the shift finger to the side end of the sector teeth, not only improves the accuracy and stability of power transmission, but also makes the structure of the actuator more compact, reduces wear on the shaft ends, and reduces noise. Furthermore, by setting the module of the large gear in the transmission component, the overall compactness of the shift actuator structure can be further improved, making it more delicate and refined, effectively improving the vehicle's NVH (noise, vibration, and harshness). On the other hand, by setting a limiting component to limit the movement range of the sector teeth, the rotation amplitude of the sector teeth can be reduced, thereby lowering the precision control requirements of the shift motor.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A shift actuator characterized by comprising: Comprising, a shift housing (1); a shift motor (2) connected to the shift housing (1); a transmission assembly (3) comprising a first shaft (31), a second shaft (33) and a third shaft (34) rotatably connected to the inside of the shift housing (1) respectively, the first shaft (31) being fixedly connected to the output shaft of the shift motor (2), the second shaft (33) being fixedly connected with a big gear (32), the big gear (32) being engaged with the first shaft (31), the third shaft (34) being fixedly connected with a sector gear (35), the sector gear (35) being engaged with the second shaft (33); a shift finger (4) connected to the sector gear (35).

2. The shift actuator according to claim 1, characterized by The shift finger (4) is integrally connected to the side end of the sector gear (35).

3. The shift actuator according to claim 1, characterized by The third shaft (34) is fixedly provided with a mounting step (341), and the sector gear (35) is sleeved on the third shaft (34) and connected to the mounting step (341).

4. The shift actuator according to claim 1, characterized by The shift actuator further comprises a shift position sensor (5) connected to the shaft end of the third shaft (34).

5. The shift actuator according to claim 1, characterized by The shift housing (1) is further connected to a limiting piece (6) on the side corresponding to the sector gear (35), and the limiting piece (6) is used to limit the movement range of the sector gear (35).

6. The shift actuator according to claim 5, wherein The sector gear (35) is fixedly provided with two barriers (351) in the form of protrusions at one end facing the limiting piece (6), and the limiting piece (6) extends between the two barriers (351).

7. The shift actuator according to Claim 1, characterized by The gear modulus of the big gear (32) is set to be between 1.0 and 1.

5.

8. The shift actuator according to Claim 1, characterized by Taking the face where the mounting plane is located as the Y direction and the other face perpendicular to the mounting plane as the X direction, in the Y direction, the first shaft (31) is arranged between the second shaft (33) and the third shaft (34), and in the X direction, the second shaft (33) is arranged between the first shaft (31) and the third shaft (34).

9. The shift actuator according to claim 8, wherein The point of the first shaft (31) projected on the Y axis is Y1, the point of the second shaft (33) projected on the Y axis is Y2, and the point of the third shaft (34) projected on the Y axis is Y3, Y1Y2 has a first distance L1, Y1Y3 has a second distance L2, L1:L2=1:(1.5-1.8); The point of the first shaft (31) projected on the X axis is X1, the point of the second shaft (33) projected on the X axis is X2, and the point of the third shaft (34) projected on the X axis is X3, X1X2 has a third distance L3, X2X3 has a fourth distance L4, L3:L4=(7-7.5):

1.

10. A transmission characterized by, The shift actuator of any one of claims 1-9. The shift actuator of any one of claims 1-9.

Images