Full-sealing structure of gear train of automobile gear shifting actuator
By adopting a fully sealed structure and triangle rib design in the gear train of the automobile shift actuator, the problems of metal powder falling and the gear not being fixed firmly are solved, and higher stability and service life are achieved.
Patent Information
- Application Number
- CN202420483259.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-13
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-03-13
AI Technical Summary
The gear train design of existing automotive gear shift actuators has the problem of not being completely sealed, which causes metal powder to fall onto the PCBA, which may cause problems such as short circuits, and in high torque applications, the gear is not firmly fixed, resulting in insufficient stability and life.
The fully sealed structure design is adopted, and the gear system is fully sealed, and the triangular rib design is used to provide interference contact in the axial direction to ensure that the gear system is more securely fixed.
The gear system is fully sealed to prevent metal powder from falling to PCBA, reduce the risk of short circuit, and improve the fixed stability of the gear system through the triangular rib design, extend the service life and vibration resistance.
Smart Images
Figure CN222798095U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of automobile shift actuators, in particular to a fully sealed structure of a gear system of an automobile shift actuator. Background Art
[0002] The current shift actuators on the market do not have a completely sealed design for the gear system, and the gear system will produce metal powder due to wear during use. The powder will fall onto the PCBA through the structural gap, and there is a certain probability that it will fall onto the electrical connection, causing problems such as short circuits, thereby causing intermittent or continuous failure of the product.
[0003] At the same time, the special application of the shift actuator requires a rated torque of 15Nm, and the peak value can reach 60Nm, which places high demands on the fixation of the gears. The current shift actuator design on the market only uses radial interference for fixation, and the axial relative holding force is relatively small, which poses risks. Utility Model Content
[0004] The main technical problem solved by the utility model is to provide a fully sealed structure for the gear system of an automobile shift actuator. The gear system is fully sealed, and metal powder generated during use will not fall into the PCBA, thereby avoiding problems such as short circuits. The design of triangular ribs is used to provide interference contact in the axial direction during assembly, so that the gear system is more securely fixed, and the service life and vibration resistance are improved.
[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a fully sealed structure of the gear system of an automobile shift actuator, including a power worm, a sun gear turbine duplex teeth, a planetary carrier, a planetary gear set, an axis core, and a cover plate. The power worm is drivingly meshed with the sun gear turbine duplex teeth, and the sun gear turbine duplex teeth are drivingly meshed with the planetary gear set on the planetary carrier. The planetary carrier and the sun gear turbine duplex teeth are coaxially arranged in upper and lower layers on the axis core, and the top end of the axis core is sealed and penetrated with a cover plate covering the planetary gear set.
[0006] In a preferred embodiment of the present invention, the sun gear and turbine duplex gears are composed of an integrally formed sun gear and turbine gear, the sun gear is drivingly meshed with the planetary gear set, and the turbine gear is drivingly meshed with the power worm.
[0007] In a preferred embodiment of the present invention, the power worm and the turbine gear are accommodated in a turbine bottom shell, and the lower end of the shaft core is vertically supported on the turbine bottom shell through a lower bearing.
[0008] In a preferred embodiment of the present invention, the upper end of the shaft core is vertically supported on the cover plate through an upper bearing.
[0009] In a preferred embodiment of the present invention, the turbine bottom shell is provided with a partition covering the turbine gear, the sun gear passes through the partition, and the partition is lined on the bottom of the planetary gear set and isolates the planetary gear set from the turbine gear.
[0010] In a preferred embodiment of the utility model, the planetary gear set is surrounded by a ring gear, the ring gear is fixed in a shell, the cover plate is assembled and spliced with the shell, the bottom surface of the cover plate is provided with an upper triangular rib that has interference contact with the ring gear, and the upper surface of the partition plate is provided with a lower triangular rib that has interference contact with the ring gear.
[0011] In a preferred embodiment of the present utility model, the cover plate is provided with a through hole adapted to the shaft core, and an oil seal is provided between the through hole and the shaft core.
[0012] The beneficial effects of the utility model are as follows: the utility model provides a fully sealed structure of the gear system of an automobile shift actuator, which fully seals the gear system, and metal powder generated during use will not fall into the PCBA, thereby avoiding problems such as short circuits, and adopts a triangular rib design to provide interference contact in the axial direction during assembly, so that the gear system is more securely fixed, and the service life and vibration resistance are improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:
[0014] Figure 1 This is a cross-sectional view of a fully sealed structure of a gear train of an automobile shift actuator according to the utility model;
[0015] Figure 2 This is an exploded view of a fully sealed structure of a gear train of an automobile shift actuator of the utility model;
[0016] Figure 3 The utility model is a three-dimensional assembly diagram of a fully sealed structure of a gear system of an automobile shift actuator. DETAILED DESCRIPTION
[0017] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0018] like Figure 1-3 As shown, the embodiment of the utility model includes:
[0019] A fully sealed gear system structure of an automobile shift actuator 100 includes a power worm 1, a sun gear turbine duplex teeth 2, a planet carrier 3, a planetary gear set 4, a shaft core 5, and a cover plate 6. The power worm 1 is in driving engagement with the sun gear turbine duplex teeth 2, the sun gear turbine duplex teeth 2 are in driving engagement with the planetary gear set 4 on the planet carrier 3, the planet carrier 3 and the sun gear turbine duplex teeth 2 are coaxially arranged in upper and lower layers on the shaft core 5, and the top of the shaft core 5 is sealed and penetrated with a cover plate 6 covering the planetary gear set 4.
[0020] The sun gear and turbine duplex gear 2 is composed of an integrally formed sun gear 7 and a turbine gear 8 . The sun gear 7 is in driving engagement with the planetary gear set 4 , and the turbine gear 8 is in driving engagement with the power worm 1 .
[0021] Furthermore, the power worm 1 and the turbine gear 8 are accommodated in a turbine bottom shell 9 , and the lower end of the shaft core 5 is vertically supported on the turbine bottom shell 9 through a lower bearing 10 .
[0022] Furthermore, the upper end of the shaft core 5 is vertically supported on the cover plate 6 via an upper bearing 11 .
[0023] Furthermore, the turbine bottom shell 9 is provided with a partition 12 covering the turbine gear 8 , and the sun gear 7 passes through the partition 12 . The partition 12 is lined on the bottom of the planetary gear set 4 and isolates the planetary gear set 4 from the turbine gear 8 .
[0024] Furthermore, the planetary gear set 4 is surrounded by a ring gear 13, and the ring gear 13 is fixed in a shell 14. The cover plate 6 is assembled and spliced with the shell 14. The bottom surface of the cover plate 6 is provided with an upper triangular rib 15 that has interference contact with the ring gear 13, and the upper surface of the partition plate 12 is provided with a lower triangular rib 16 that has interference contact with the ring gear 13.
[0025] Furthermore, the cover plate 6 is provided with a through hole adapted to the shaft core 5 , and an oil seal 17 is provided between the through hole and the shaft core 5 .
[0026] In this embodiment, Figure 2 As shown, the bottom of the housing 14 is provided with a motor 18 that is transmission-connected to the power worm 1 and a PCBA 19 that is electrically connected to the motor 18. In order to ensure that the PCBA 19 is not damaged by metal powder, it is necessary to isolate the gear that can form metal powder. Specifically, the turbine gear 8 is wrapped in the turbine bottom shell 9, and the formed metal powder will be collected in the turbine bottom shell 9. The metal powder formed between the sun gear 7 and the planetary gear set 4 will fall from the through hole in the center of the partition 12 into the turbine bottom shell 9.
[0027] In addition, in order to solve the problem of weakened axial stability between the planetary gear set 4 and the ring gear 13 caused by vibration during the operation of the motor 18, this product uses two sets of triangular ribs to interfere with the ring gear 13 to improve the overall stability of the planetary gear set 4 and reduce the wear caused by resonance, thereby extending the overall service life of the product.
[0028] In summary, the utility model provides a fully sealed structure of the gear system of the automotive shift actuator 100, which fully seals the gear system. The metal powder generated during use will not fall into the PCBA 19, thereby avoiding problems such as short circuits. The triangular rib design provides interference contact in the axial direction during assembly, making the gear system more securely fixed, and improving the lifespan and vibration resistance.
[0029] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A fully sealed structure for a gear train of an automobile shift actuator, characterized in that: It includes a power worm, a sun gear turbine duplex teeth, a planetary carrier, a planetary gear set, a shaft core, and a cover plate. The power worm is drivingly meshed with the sun gear turbine duplex teeth, and the sun gear turbine duplex teeth are drivingly meshed with the planetary gear set on the planetary carrier. The planetary carrier and the sun gear turbine duplex teeth are coaxially arranged in upper and lower layers on the shaft core, and the top end of the shaft core is sealed with a cover plate covering the planetary gear set.
2. The fully sealed structure of the gear train of the automotive shift actuator according to claim 1, characterized in that: The sun gear and turbine duplex gear is composed of an integrally formed sun gear and turbine gear, the sun gear is drivingly meshed with the planetary gear set, and the turbine gear is drivingly meshed with the power worm.
3. The fully sealed structure of the gear train of the automotive shift actuator according to claim 2 is characterized in that: The power worm and the turbine gear are accommodated in a turbine bottom shell, and the lower end of the shaft core is vertically supported on the turbine bottom shell through a lower bearing.
4. The fully sealed structure of the gear train of the automotive shift actuator according to claim 1 is characterized in that: The upper end of the shaft core is vertically supported on the cover plate through an upper bearing.
5. The fully sealed structure of the gear train of the automotive shift actuator according to claim 3 is characterized in that: The turbine bottom shell is provided with a partition covering the turbine gear, the sun gear passes through the partition, and the partition is lined on the bottom of the planetary gear set and isolates the planetary gear set from the turbine gear.
6. The fully sealed structure of the gear train of the automotive shift actuator according to claim 5 is characterized in that: The planetary gear set is surrounded by a gear ring, which is fixed in a shell. The cover plate is assembled and spliced with the shell. The bottom surface of the cover plate is provided with an upper triangular rib that has interference contact with the gear ring, and the upper surface of the partition plate is provided with a lower triangular rib that has interference contact with the gear ring.
7. The fully sealed structure of the gear train of the automotive shift actuator according to claim 1, characterized in that: The cover plate is provided with a through hole adapted to the shaft core, and an oil seal is provided between the through hole and the shaft core.