Electronic gearshift

Abstract

The utility model relates to an electronic gear shifter, including shell, be located in the motor in the shell, with the worm that motor output shaft connects, rotatable be located on the worm engagement of worm wheel in the shell, with the pinion that worm wheel coaxial fixed, rotatable be located in the speed reducer that engages with pinion in the shell, the speed reducer is connected with gearbox, lubrication system: the one end away from motor of worm is equipped with the oil groove, is equipped with the screw rod that is fixed with worm coaxial in the oil groove, the oil groove side wall is equipped with a plurality of oil outlet holes, be equipped with the oil tank in the shell, and the oil tank is passed through the oil pipe and is linked together with the oil groove, the length of screw rod is greater than the axial depth of oil groove, and the spiral groove of screw rod corresponds with the export end of oil pipe. Oil recovery system. The utility model can realize efficient deceleration, self -adaptive lubrication and oil recovery, realize compact layout at the same time, reduce energy consumption and maintenance demand through the self -driven lubrication mechanism, to enhance the reliability and service life of gear shifter.

Description

Technical Field

[0001] This utility model relates to the field of gear shifter technology, specifically to an electronic gear shifter. Background Technology

[0002] With the increasing electrification of automobiles, electronic gear shifters are gradually replacing traditional mechanical gear shifters. Driven by a motor, they achieve precise gear shifting control and have become one of the core components of automatic transmissions. Existing electronic gear shifters mostly employ multi-stage gear reduction mechanisms to achieve high transmission ratios, but this design has significant drawbacks: firstly, the superposition of multiple gear stages leads to a complex transmission structure and excessively long axial dimensions, making it difficult to implement in scenarios with limited vehicle chassis space; secondly, high-speed gears are subjected to high-speed dynamic loads for extended periods, easily causing tooth surface wear, increased noise, and other problems, affecting transmission accuracy and service life. This paper proposes an electronic gear shifter to address these issues. Utility Model Content

[0003] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0004] To address the technical problems mentioned in the background section above, some embodiments of this application provide an electronic gear shifter, including a housing, a motor disposed within the housing, a worm gear connected to the output shaft of the motor, a worm wheel rotatably disposed on the housing and meshing with the worm gear, a pinion fixed coaxially with the worm wheel, and a reduction gear rotatably disposed within the housing and meshing with the pinion, wherein the reduction gear is connected to the gearbox;

[0005] Lubrication system: The end of the worm gear away from the motor is provided with an oil groove, and a screw is fixed coaxially with the worm gear in the oil groove. The side wall of the oil groove is provided with multiple oil outlet holes. An oil tank is provided on the outer shell, and the oil tank is connected to the oil groove through an oil pipe. The length of the screw is greater than the axial depth of the oil groove, and the spiral groove of the screw corresponds to the outlet end of the oil pipe.

[0006] Specifically, the lubrication system includes an oil box located below the worm gear, and the oil box is connected to the oil tank via a one-way flow component.

[0007] Specifically, the unidirectional flow assembly includes a first gear located at the end of the worm gear near the motor, a second gear rotatably mounted on the outer casing and meshing with the first gear, a rotating shaft fixed on the second gear, a rigid pipe connected to the bottom of the oil box, and the other end of the rigid pipe communicating with a circular cavity inside the outer casing; the rotating shaft rotatably passes through the circular cavity, and the rotating shaft and the circular cavity are coaxially arranged; an eccentrically arranged ring is provided in the circular cavity, and a clearance groove is opened on the ring; a baffle is fixed on the rotating shaft, the baffle extends into the clearance groove and rotates unidirectionally with the rotating shaft; the circular cavity and the oil tank are connected by a rigid oil pipe.

[0008] Specifically, the oil groove is a cylindrical cavity whose axis coincides with the axis of the worm gear, and a lubricating oil channel is formed between the inner wall of the oil groove and the screw.

[0009] Specifically, the oil outlet holes are evenly distributed around the circumference of the oil groove, and the axis of the oil outlet holes faces the meshing area of ​​the worm and the worm wheel.

[0010] The beneficial effects of this utility model are:

[0011] (1) A large reduction ratio is achieved through worm gear transmission, which can quickly reduce the output speed of the motor and amplify the torque, so that subsequent gears only need to bear a smaller transmission ratio, significantly reducing the number of transmission stages. Compared with the traditional multi-stage gear stacking structure, this solution avoids the problem of volume expansion, and is especially suitable for vehicle-mounted scenarios with limited radial space. The design of short axial dimension of worm gear and worm and coaxial arrangement with motor further optimizes space utilization, and can simultaneously achieve the dual requirements of "large transmission ratio" and "precise output" in a small space, improving the environmental adaptability of the gear shifter.

[0012] (2) The transmission layout with the worm gear in front means that the reduction gear only needs to handle the torque amplified by the worm gear, and does not need to bear the dynamic load caused by the high speed in the high-speed section, which effectively reduces the fatigue wear of the reduction gear. The low-speed condition after the worm gear reduction reduces the impact load when the pinion meshes with the reduction gear. With the precise transmission ratio design, the overall service life of the shifter can be extended.

[0013] (3) In the oil groove located at the end of the worm furthest from the motor, the screw rotates synchronously with the worm, continuously squeezing the lubricating oil from the oil tank into the oil groove and spraying it through the oil outlet to the meshing area between the worm and the worm wheel. The characteristic that the oil outlet speed is proportional to the motor speed allows the lubrication amount to be automatically adjusted according to the shifting frequency: increasing the lubrication supply during high-speed shifting and reducing oil consumption during low-speed shifting, thus ensuring the lubrication effect and avoiding lubricating oil waste. This design effectively reduces the sliding friction loss of the worm wheel and worm, significantly improving its service life. Attached Figure Description

[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0015] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0016] In the attached diagram:

[0017] Figure 1 This is a structural diagram of the present invention;

[0018] Figure 2 This is a diagram of the internal structure of the present invention;

[0019] Figure 3 for Figure 2 AA-line sectional view;

[0020] Figure 4 This is a structural diagram of the lubrication system in this utility model;

[0021] Figure 5 for Figure 4 BB line section view;

[0022] Figure 6 for Figure 4 CC-line sectional view. Detailed Implementation

[0023] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0024] It should also be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0025] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0026] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0027] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] Reference Figure 1-6 As shown, the electronic gear shifter of this utility model includes a housing 1, a motor 2 disposed inside the housing 1, a worm gear 3 connected to the output shaft of the motor 2, a worm wheel 4 rotatably disposed on the housing 1 and meshing with the worm gear 3, a pinion 5 coaxially fixed with the worm wheel 4, and a reduction gear 6 rotatably disposed inside the housing 1 and meshing with the pinion 5. The reduction gear 6 is connected to the gearbox.

[0029] like Figure 4 As shown, it also includes a lubrication system: the end of the worm gear 3 away from the motor 2 is provided with an oil groove 7, and a screw 8 is provided in the oil groove 7 and fixed coaxially with the worm gear 3. The side wall of the oil groove 7 is provided with multiple oil outlet holes 9. The outer shell 1 is provided with an oil tank 10, and the oil tank 10 is connected to the oil groove 7 through an oil pipe 11. The length of the screw 8 is greater than the axial depth of the oil groove 7, and the spiral groove of the screw 8 corresponds to the outlet end of the oil pipe 11.

[0030] When the motor starts, it drives the worm gear to rotate, which in turn drives the worm wheel and pinion to rotate, thus rotating the reduction gear. Simultaneously, the screw and worm gear rotate together, forcing oil from the oil pipe into the oil groove inside the worm gear. This oil, through the oil outlet, lubricates the contact surfaces of the worm gear and worm wheel, reducing friction. Using an electronic gear shifter with this structure, a large reduction ratio is achieved through worm gear transmission. When connected to the motor, it can quickly reduce speed and amplify torque, allowing subsequent gears to handle only a smaller transmission ratio, significantly reducing the number of transmission stages. Compared to traditional multi-stage gear transmission structures, this effectively avoids the volume expansion problem caused by the stacking of multiple gears. Furthermore, the coaxial arrangement of the worm gear and motor significantly reduces the overall size of the shifter, improving space utilization efficiency. The screw speed is proportional to the motor speed, allowing for dynamic adjustment of lubrication intensity based on actual workload, effectively reducing friction-induced losses and extending service life.

[0031] Specifically, the lubrication system includes an oil box 12 located below the worm gear 3, and the oil box 12 is connected to the oil tank 10 through a one-way flow component 13.

[0032] Specifically, the unidirectional flow assembly 13 includes a first gear 14 located at the end of the worm gear 3 near the motor 2, a second gear 15 rotatably mounted on the outer casing 1 and meshing with the first gear 14, a rotating shaft 16 fixed on the second gear 15, a rigid tube 17 connected to the bottom of the oil box 12, and the other end of the rigid tube 17 connected to a circular cavity 18 inside the outer casing 1; the rotating shaft 16 is rotatably inserted into the circular cavity 18, and the rotating shaft 16 and the circular cavity 18 are coaxially arranged; an eccentrically arranged ring 19 is provided in the circular cavity 18, and a clearance groove 20 is opened on the ring 19; a baffle 21 is fixed on the rotating shaft 16, the baffle 21 extends into the clearance groove 20 and rotates unidirectionally with the rotating shaft 16; the circular cavity 18 and the oil tank 10 are connected by a rigid oil pipe 22.

[0033] Specifically, the oil groove 7 is a cylindrical cavity whose axis coincides with the axis of the worm gear 3, and a lubricating oil channel is formed between the inner wall of the oil groove 7 and the screw 8.

[0034] Specifically, the oil outlet holes 9 are evenly distributed around the oil groove 7, and the axis of the oil outlet holes 9 is oriented towards the meshing area of ​​the worm 3 and the worm wheel 4.

[0035] After the motor starts, it drives the worm gear to rotate, and the first gear and the second gear rotate accordingly, which in turn drives the shaft and the stop rod to rotate. The stop rod is in close contact with the inner wall of the circular cavity. When the stop rod rotates, it drives the oil in the oil box to move towards the hard oil pipe, and then flows to the oil tank through the hard oil pipe, so as to realize the reuse of the lubricating oil.

[0036] In summary, this invention can achieve efficient deceleration, adaptive lubrication, and oil recovery. While achieving a compact layout, it reduces energy consumption and maintenance requirements through a self-driven lubrication mechanism, thereby improving the reliability and service life of the gear shifter.

[0037] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in the embodiments of this disclosure is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. An electronic gear shifter, comprising a housing (1), a motor (2) disposed within the housing (1), a worm gear (3) connected to the output shaft of the motor (2), a worm wheel (4) rotatably disposed on the housing (1) and meshing with the worm gear (3), a pinion (5) coaxially fixed with the worm wheel (4), and a reduction gear (6) rotatably disposed within the housing (1) and meshing with the pinion (5), wherein the reduction gear (6) is connected to a gearbox; characterized in that: Lubrication system: The end of the worm (3) away from the motor (2) is provided with an oil groove (7), and a screw (8) is provided in the oil groove (7) and fixed coaxially with the worm (3). The side wall of the oil groove (7) is provided with multiple oil outlet holes (9). The outer shell (1) is provided with an oil tank (10), and the oil tank (10) is connected to the oil groove (7) through an oil pipe (11). The length of the screw (8) is greater than the axial depth of the oil groove (7), and the spiral groove of the screw (8) corresponds to the outlet end of the oil pipe (11).

2. The electronic gear shifter according to claim 1, characterized in that: The lubrication system includes an oil box (12) located below the worm (3), and the oil box (12) is connected to the oil tank (10) via a one-way flow component (13).

3. An electronic gear shifter according to claim 2, characterized in that: The unidirectional flow assembly (13) includes a first gear (14) located at the end of the worm gear (3) near the motor (2), and a second gear (15) rotatably mounted on the housing (1) meshing with the first gear (14). A rotating shaft (16) is fixed on the second gear (15). A rigid tube (17) is connected to the bottom of the oil box (12), and the other end of the rigid tube (17) is connected to a circular cavity (18) inside the housing (1). The rotating shaft (16) is rotatably It is installed inside the circular cavity (18), and the rotating shaft (16) is coaxial with the circular cavity (18); the circular cavity (18) is provided with an eccentrically arranged circular ring (19), and a relief groove (20) is opened on the circular ring (19); a baffle (21) is fixed on the rotating shaft (16), the baffle (21) extends into the relief groove (20) and rotates unidirectionally with the rotating shaft (16); the circular cavity (18) and the oil tank (10) are connected by a hard oil pipe (22).

4. An electronic gear shifter according to claim 1, characterized in that: The oil groove (7) is a cylindrical cavity with its axis coinciding with the axis of the worm (3), and a lubricating oil channel is formed between the inner wall of the oil groove (7) and the screw (8).

5. An electronic gear shifter according to claim 1, characterized in that: The oil outlet holes (9) are evenly distributed around the oil groove (7), and the axis of the oil outlet holes (9) is oriented towards the meshing area of ​​the worm (3) and the worm wheel (4).

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