Gear shift actuator

Abstract

The utility model relates to a kind of gear shifting actuator, it includes: motor assembly, the motor assembly at least includes motor, the motor has motor shaft;Shell, the shell includes lower shell and main shell being installed on the lower shell;First transmission mechanism, the first transmission mechanism rotatably installed in the main shell and is connected with the motor shaft;Reversing transmission buffer mechanism, the reversing transmission buffer mechanism rotatably installed in the main shell and is engaged with the first transmission mechanism;Output shaft mechanism, the output shaft mechanism at least includes rotatably installed in the lower shell output shaft;Second transmission mechanism, the second transmission mechanism is installed in the shell, it is engaged with the reversing transmission buffer mechanism and is connected with the output shaft. It can be quickly gear shifting response;And it can reduce the damage of impact force to transmission structure in gear shifting process.

Description

Technical Field

[0001] This utility model belongs to the field of automotive transmission structure technology and relates to a gear shifting actuator. Background Technology

[0002] The gear shift actuator is a key component of an automotive transmission system. Its main function is to drive the gearbox to change gears and perform shifting based on instructions from the gear shift controller, thereby enabling the vehicle to operate normally. Currently, gear shift actuators primarily use pneumatic, hydraulic, or traditional mechanical methods to drive the shift fork and achieve gear changes.

[0003] Chinese invention patent application number 202411723599.1 discloses a self-locking gear shifting actuator. This actuator includes a drive motor for providing torque; a transmission assembly connected to the output end of the drive motor to transmit its output torque; a gear self-locking assembly including an input locking gear and an output locking gear, the input locking gear receiving the torque transmitted by the transmission assembly, and the input and output locking gears having an engaged state, a disengaged state, and a locked state; in the engaged state, rotation of the input locking gear drives rotation of the output locking gear; in the disengaged state, the input locking gear disengages from the output locking gear; in the locked state, the input locking gear blocks rotation of the output locking gear; an output shaft connected to the output locking gear and capable of rotating with it; and a shift fork connected to the output shaft and performing the shifting function. This gear shifting actuator effectively solves the problem of the shift fork disengaging when the transmission is applying torque, but it cannot reduce the impact of the shock generated during gear shifting by the car's transmission, electric drive axle, etc., on the internal transmission components of the actuator. Summary of the Invention

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a gear shifting actuator.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a gear shifting actuator, comprising: A motor assembly, the motor assembly including at least a motor, the motor having a motor shaft; A housing, the housing comprising a lower housing and a main housing mounted on the lower housing; A first transmission mechanism is rotatably mounted inside the main housing and connected to the motor shaft; A reversing transmission buffer mechanism is rotatably mounted inside the main housing and meshes with the first transmission mechanism; An output shaft mechanism, the output shaft mechanism comprising at least an output shaft rotatably mounted in the lower housing; The second transmission mechanism is installed inside the housing and engages with the reversing transmission buffer mechanism and is connected to the output shaft.

[0006] Optimally, the motor assembly further includes a motor housing mounted on one side of the main housing, and the motor is mounted inside the motor housing.

[0007] Ideally, the first transmission mechanism includes a spur gear connected to the motor shaft and a first bearing sleeved on the spur gear and disposed within the main housing.

[0008] Furthermore, the output shaft mechanism also includes a second bearing and a third bearing sleeved on the output shaft and disposed within the lower housing, and an oil seal disposed between the lower housing and the output shaft and located between the second bearing and the third bearing.

[0009] Furthermore, the reversing transmission buffer mechanism includes: The face gear includes a face gear body that meshes with the spur gear, a limiting sleeve formed on the surface of the face gear body, and a plurality of first limiting protrusions formed on another surface of the face gear body and spaced apart. The limiting sleeve has a first through hole that penetrates the face gear body at its center. A planetary gear disk, comprising a disk body spaced apart from the face gear body, a plurality of second limiting protrusions formed on the surface of the disk body and cooperating with the first limiting protrusion, a first planetary tooth formed on another surface of the disk body, and a plurality of first mounting holes formed on the disk body and surrounding the outer ring of the first planetary tooth; a second through hole penetrating the disk body is formed at the center of the first planetary tooth. The buffer includes a buffer body and a plurality of lugs formed on the circumferential surface of the buffer body and sandwiched between the first limiting protrusion and the second limiting protrusion. A third through hole is provided at the center of the buffer body to cooperate with the first through hole and the second through hole.

[0010] Furthermore, the side of each of the lugs is a convex arc surface, the side of the first limiting lug is a first concave arc surface that mates with the convex arc surface, and the side of the second limiting lug is a second concave arc surface that mates with the convex arc surface.

[0011] Furthermore, the second transmission mechanism includes: The first planetary gear assembly includes a first planetary gear disk body, a plurality of first mounting rods mounted on the first planetary gear disk body, a second planetary tooth body formed on another surface of the first planetary gear disk body, and a plurality of first planetary gears rotatably and correspondingly mounted on the first mounting rods. Each first planetary gear meshes with the first planetary tooth body, and a fourth through hole penetrating the first planetary gear disk body is provided at the center of the second planetary tooth body. The second planetary gear assembly includes a second planetary gear disk body, multiple second mounting rods mounted on the surface of the second planetary gear disk body, a polygonal limiting block formed on another surface of the second planetary gear disk body, and multiple second planetary gears rotatably and correspondingly mounted on the second mounting rods. Each second planetary gear meshes with the second planetary gear body, and a non-circular mounting hole is provided at the center of the second planetary gear disk body. A gear ring, which is installed inside the housing and meshes with a plurality of first planetary gears and a plurality of second planetary gears respectively.

[0012] Furthermore, it also includes: A magnet assembly comprising a magnet rod with one end mounted in the non-circular mounting hole and the other end passing through the fourth through hole, the second through hole, the third through hole and the first through hole, and a magnet embedded in the other end of the magnet rod.

[0013] Furthermore, it also includes: A sensor, which is mounted on the housing and engages with the magnet.

[0014] The beneficial effects of this application are: the shifting actuator of this utility model, by adopting a first transmission mechanism, a reversing transmission buffer mechanism and a second transmission mechanism with specific structures, can quickly shift gears; and can reduce the damage to the transmission structure caused by the impact force during shifting. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the shifting actuator of this utility model; Figure 2 This is a cross-sectional view of the gear shifting actuator of this utility model; Figure 3 This is an exploded view (first perspective) of the reversing transmission buffer mechanism in the shifting actuator of this utility model. Figure 4 This is an exploded view (second perspective) of the reversing transmission buffer mechanism in the shifting actuator of this utility model. Figure 5This is an exploded view of the reversing transmission buffer mechanism and the second transmission mechanism in the shifting actuator of this utility model. Detailed Implementation

[0016] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0017] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments, and the operational steps involved in each embodiment can also be rearranged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for clearly describing a particular embodiment and do not imply that they represent the necessary components and / or order.

[0018] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0019] like Figures 1 to 5 The shifting actuator shown mainly includes a motor assembly 1, a housing, an output shaft mechanism 3, a first transmission mechanism 4, a reversing transmission buffer mechanism 5, and a second transmission mechanism 6.

[0020] The motor assembly includes at least a motor 1, which has a motor shaft 11 to output torque. The housing includes a lower housing 21 and a main housing 22 mounted on the lower housing 21. A receiving cavity is formed between the lower housing 21 and the main housing 22 for accommodating or mounting structures such as the first transmission mechanism 4, the reversing transmission buffer mechanism 5, and the second transmission mechanism 6. In this embodiment, the motor assembly also includes a motor housing mounted on one side of the main housing 22, and the motor 1 is mounted inside the motor housing (i.e., the motor housing covers the outside of the motor 1).

[0021] The first transmission mechanism 4 is rotatably mounted inside the main housing 22 and connected to the motor shaft 11, for transmitting the output torque of the motor 1. In this embodiment, the first transmission mechanism 4 includes a spur gear 41 connected to the motor shaft 11 and a first bearing 42 sleeved on the spur gear 41 and disposed inside the main housing 22 (the inner ring of the first bearing 42 is interference-fitted with the spur gear 41, and the outer ring of the first bearing 42 is clearance-fitted with the main housing 22). Specifically, a connecting hole with a non-circular cross-section extending along its axial direction can be opened in the spur gear 41, and the free end of the motor shaft 11 is inserted into the corresponding connecting hole. Thus, when the motor shaft 11 rotates, it can drive the spur gear 41 to rotate synchronously.

[0022] The output shaft mechanism 3 includes at least an output shaft 31 rotatably mounted in the lower housing 21 (the free end of the output shaft 31 extends outside the lower housing 21). In this embodiment, the output shaft mechanism 3 further includes a second bearing 33 and a third bearing 32 sleeved on the output shaft 31 and disposed within the lower housing 21, and an oil seal 34 disposed between the lower housing 21 and the output shaft 31 and located between the second bearing 33 and the third bearing 32. Specifically, the inner ring of the second bearing 33 is interference-fitted with the output shaft 31 and the outer ring is clearance-fitted with the lower housing 21, the output shaft 31 is clearance-fitted with the inner ring of the third bearing 32 and the outer ring of the third bearing 32 is clearance-fitted with the lower housing 21. Simultaneously, the output shaft 31 is interference-fitted with the inner ring of the oil seal 34, and the outer ring of the oil seal 34 is interference-fitted with the lower housing 21, achieving a seal between the output shaft 31 and the lower housing 21.

[0023] The reversing transmission buffer mechanism 5 is rotatably mounted inside the main housing 22 and meshes with the first transmission mechanism 4 to reverse the transmission direction. The reversing transmission buffer mechanism 5 includes a face gear 51, a buffer member 52, and a planetary gear disk 53, etc. The face gear 51 includes a face gear body 511 that meshes with the spur gear 41 (the axis of the face gear body 511 is perpendicular to the axis of the spur gear 41), a limiting sleeve 513 formed on the surface of the face gear body 511 (usually formed in a conventional manner such as integral molding), and a plurality of first limiting protrusions 512 formed on another surface of the face gear body 511 and spaced apart (in this embodiment, there are two first limiting protrusions 512, which are axially symmetrical about the axis of the face gear body 511). A first through hole 5131 penetrating the face gear body 511 is opened at the center of the limiting sleeve 513. The planetary gear disk 53 includes a disk body 531 spaced apart from the face gear body 511, a plurality of second limiting protrusions 533 formed on the surface of the disk body 531 and cooperating with the first limiting protrusion 512 (in this embodiment, there are also two second limiting protrusions 533, which are axially symmetrical about the axis of the disk body 531 and staggered from the two first limiting protrusions 512, so that an interval space is formed between adjacent first limiting protrusions 512 and second limiting protrusions 533), a first planetary tooth body 532 formed on another surface of the disk body 531, and a plurality of first mounting holes 530 opened on the disk body 531 and surrounding the outer ring of the first planetary tooth body 532; a second through hole 5321 penetrating the disk body 531 is opened at the center of the first planetary tooth body 532. The buffer 52 can be made of conventional elastic materials (such as rubber). It includes a buffer body 521 and a plurality of lugs 523 formed on the periphery of the buffer body 521 and sandwiched between the first limiting protrusion 512 and the second limiting protrusion 533 (in this embodiment, there are four lugs 523, which are located in the aforementioned space to separate the first limiting protrusion 512 and the second limiting protrusion 533 and prevent them from making hard contact). A third through hole 522 that cooperates with the first through hole 5131 and the second through hole 5321 is also provided at the center of the buffer body 521. In this embodiment, the side surface of each lug 523 is a convex arc surface 5231, the side surface of the first limiting lug 512 is a first concave arc surface 5121 that mates with the convex arc surface 5231, and the side surface of the second limiting lug 533 is a second concave arc surface 5331 that mates with the convex arc surface 5231. This further ensures the uniformity of the force applied to the lug 523 by the first limiting lug 512 and the second limiting lug 533, improving the buffering effect. Thus, when the spur gear 41 rotates, it drives the face gear 51 to rotate synchronously, which in turn drives the planetary gear disk 53 to rotate synchronously through the buffer member 52.

[0024] The second transmission mechanism 6 is installed inside the housing. It meshes with the reversing transmission buffer mechanism 5 and is connected to the output shaft 31. When the reversing transmission buffer mechanism 5 is in operation, the output shaft 31 can be driven to work through the second transmission mechanism 6. The second transmission mechanism 6 includes structures such as the first planetary gear assembly 61, the gear ring 62, and the second planetary gear assembly 63. The first planetary gear assembly 61 includes a first planetary gear disk 611, multiple first mounting rods 613 mounted on the first planetary gear disk 611 (e.g., multiple second mounting holes 6111 are opened on the surface of the first planetary gear disk 611, and the multiple first mounting rods 613 are installed in the multiple second mounting holes 6111 in a corresponding manner; the installation method can be: the lower part of each first mounting rod 613 is installed into the second mounting hole 6111 in an interference fit manner, and its upper end is spaced apart from the disk 531), a second planetary tooth body 612 formed on another surface of the first planetary gear disk 611, and multiple first planetary gears 614 rotatably and correspondingly mounted on the first mounting rods 613 (the number of first planetary gears 614 can be conventionally selected according to actual needs; in this application, there are four). Each first planetary gear 614 meshes with the first planetary tooth body 532, and a fourth through hole 6121 penetrating the first planetary gear disk 611 is opened at the center of the second planetary tooth body 612. In this way, when the planetary gear disk 53 rotates, it can drive multiple first planetary gears 614 to rotate synchronously (the rotation of the first planetary gear 614 is divided into rotation and revolution: such as the rotation of each first planetary gear 614 and the revolution of multiple first planetary gears 614 around the first planetary tooth body 532).

[0025] The second planetary gear assembly 63 includes a second planetary gear disk body 631, multiple second mounting rods 632 mounted on the second planetary gear disk body 631 (same as above, multiple third mounting holes are opened on the surface of the second planetary gear disk body 631, and the multiple second mounting rods 632 are installed in the multiple third mounting holes one by one, and the installation method can be: the lower part of each second mounting rod 632 is installed into the third mounting hole by interference fit, and its upper end is spaced apart from the first planetary gear disk body 611), and a polygon formed on another surface of the second planetary gear disk body 631. The limiting block 634 (preferably a polygonal limiting block 634 is assembled with the output shaft 31 by interference fit; alternatively, a limiting block with a non-circular cross section can be used to interfere fit with the output shaft 31) and a plurality of second planetary gears 633 (the number of second planetary gears 633 can be conventionally selected according to actual needs, and there are five in this application) are rotatably and correspondingly mounted on the second mounting rod 632. Each second planetary gear 633 meshes with the second planetary gear body 612, and a non-circular mounting hole 6311 is provided at the center of the second planetary gear disk body 631.

[0026] The gear ring 62 is installed inside the housing (with an interference fit inside the main housing 22) and meshes with multiple first planetary gears 614 and multiple second planetary gears 633. This reduces the wobble of the second planetary gear assembly 63 and the first planetary gear assembly 61 during rotation and reduces friction during rotation, ensuring efficient and smooth transmission. Thus, when the planetary gear disk 53 rotates, it drives multiple first planetary gears 614 to rotate synchronously (both on their own axis and around the central axis), thereby causing the first planetary gear disk body 611 to rotate relative to the gear ring 62. Simultaneously, the second planetary gear body 612 rotates synchronously, driving multiple second planetary gears 633 to rotate synchronously (both on their own axis and around the central axis: the rotation of each second planetary gear 633 and the revolution of multiple second planetary gears 633 around the second planetary gear body 612), causing the second planetary gear disk body 631 to rotate relative to the gear ring 62, thereby driving the output shaft 31 to rotate synchronously.

[0027] In this embodiment, the magnet assembly 7 includes a magnet rod 71 (one end of the magnet rod 71 is installed in the non-circular mounting hole 6311 with one end mounted in the non-circular mounting hole 6311 and the other end passing through the fourth through hole 6121, the second through hole 5321, the third through hole 522 and the first through hole 5131 with an interference fit) and a magnet 72 embedded in the other end of the magnet rod 71. This allows the second planetary gear disk 631 to rotate synchronously with the rotation of the magnet rod 71. A sensor 8 is mounted on the housing (on the outer shell of the main housing 22) and cooperates with the magnet 72 to detect the rotation angle of the magnet 72 (or the magnet rod 71), ensuring precise control of the shift position and improving the accuracy and reliability of shifting.

[0028] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A gear shifting actuator, characterized in that, It includes: The motor assembly includes at least a motor (1) having a motor shaft (11). The housing includes a lower housing (21) and a main housing (22) mounted on the lower housing (21). The first transmission mechanism (4) is rotatably mounted inside the main housing (22) and connected to the motor shaft (11); A reversing transmission buffer mechanism (5) is rotatably mounted inside the main housing (22) and meshes with the first transmission mechanism (4); The output shaft mechanism (3) includes at least an output shaft (31) rotatably mounted in the lower housing (21). The second transmission mechanism (6) is installed inside the housing and engages with the reversing transmission buffer mechanism (5) and is connected to the output shaft (31).

2. The gear shifting actuator according to claim 1, characterized in that: The motor assembly also includes a motor housing mounted on one side of the main housing (22), and the motor (1) is mounted inside the motor housing.

3. The gear shifting actuator according to claim 1, characterized in that: The first transmission mechanism (4) includes a spur gear (41) connected to the motor shaft (11) and a first bearing (42) sleeved on the spur gear (41) and disposed in the main housing (22).

4. The shifting actuator according to claim 1 or 3, characterized in that: The output shaft mechanism (3) further includes a second bearing (33) and a third bearing (32) sleeved on the output shaft (31) and disposed in the lower housing (21), and an oil seal (34) disposed between the lower housing (21) and the output shaft (31) and located between the second bearing (33) and the third bearing (32).

5. The gear shifting actuator according to claim 3, characterized in that, The reversing transmission buffer mechanism (5) includes: The face gear (51) includes a face gear body (511) that meshes with the spur gear (41), a limiting sleeve (513) formed on the surface of the face gear body (511), and a plurality of first limiting protrusions (512) formed on another surface of the face gear body (511) and spaced apart. The limiting sleeve (513) has a first through hole (5131) at the center that penetrates the face gear body (511). The planetary gear disk (53) includes a disk body (531) spaced apart from the face gear body (511), a plurality of second limiting protrusions (533) formed on the surface of the disk body (531) and cooperating with the first limiting protrusion (512), a first planetary tooth body (532) formed on another surface of the disk body (531), and a plurality of first mounting holes (530) opened on the disk body (531) and surrounding the outer ring of the first planetary tooth body (532); a second through hole (5321) penetrating the disk body (531) is opened at the center of the first planetary tooth body (532). The buffer (52) includes a buffer body (521) and a plurality of lugs (523) formed on the circumferential surface of the buffer body (521) and sandwiched between the first limiting protrusion (512) and the second limiting protrusion (533). A third through hole (522) is provided at the center of the buffer body (521) to cooperate with the first through hole (5131) and the second through hole (5321).

6. The gear shifting actuator according to claim 5, characterized in that: Each of the lugs (523) has a convex arc surface (5231) on its side, the first limiting lug (512) has a first concave arc surface (5121) that mates with the convex arc surface (5231) on its side, and the second limiting lug (533) has a second concave arc surface (5331) that mates with the convex arc surface (5231) on its side.

7. The shifting actuator according to claim 5 or 6, characterized in that, The second transmission mechanism (6) includes: The first planetary gear assembly (61) includes a first planetary gear disk (611), a plurality of first mounting rods (613) mounted on the first planetary gear disk (611), a second planetary gear (612) formed on another surface of the first planetary gear disk (611), and a plurality of first planetary gears (614) rotatably and correspondingly mounted on the first mounting rods (613). Each first planetary gear (614) meshes with the first planetary gear (532). The second planetary gear (612) has a fourth through hole (6121) at its center that penetrates the first planetary gear disk (611). The second planetary gear assembly (63) includes a second planetary gear disk (631), multiple second mounting rods (632) mounted on the surface of the second planetary gear disk (631), a polygonal limiting block (634) formed on another surface of the second planetary gear disk (631), and multiple second planetary gears (633) rotatably and correspondingly mounted on the second mounting rods (632). Each second planetary gear (633) meshes with the second planetary gear body (612). A non-circular mounting hole (6311) is provided at the center of the second planetary gear disk (631). A gear ring (62) is installed inside the housing and meshes with a plurality of first planetary gears (614) and a plurality of second planetary gears (633).

8. The gear shifting actuator according to claim 7, characterized in that, It also includes: The magnet assembly (7) includes a magnet rod (71) with one end installed in the non-circular mounting hole (6311) and the other end passing through the fourth through hole (6121), the second through hole (5321), the third through hole (522) and the first through hole (5131), and a magnet (72) embedded in the other end of the magnet rod (71).

9. The gear shifting actuator according to claim 8, characterized in that, It also includes: Sensor (8), which is mounted on the housing and engages with the magnet (72).

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