Car tailgate motor

Abstract

This utility model discloses an automobile tailgate motor, including a motor, a sun gear fixed on the output shaft of the motor, and a planetary gear reducer on the upper side of the motor. The planetary gear reducer includes a housing, and a positioning hole corresponding to the center of the planetary gear reducer is opened at the bottom of the housing. A positioning block is provided on the lower side of the sun gear. The positioning block is fixed to the output shaft of the motor and is adapted to the positioning hole. By adapting the positioning block on the motor output shaft to the positioning hole at the bottom of the planetary gear reducer housing, the positioning block is inserted into the positioning hole before the sun gear is inserted. This can accurately guide the sun gear to correspond to the center of the multi-stage planetary gear reduction structure, solving the problem that it is difficult to align the center of the planetary gear due to the insertion hole being too large and lacking precise guidance. This makes it easier to achieve meshing between the sun gear and the multi-stage planetary gear reduction structure without multiple adjustments.

Description

Technical Field

[0001] This utility model relates to the field of automotive tailgate drive technology, and in particular to automotive tailgate motors. Background Technology

[0002] The tailgate motor, as the core drive component controlling the automatic opening, closing, and hovering of the tailgate, forms a drive structure with a planetary gear reducer to drive the tailgate's struts and achieve automated tailgate operation. In this structure, the sun gear on the motor's output shaft needs to be inserted into the planetary gear reducer and mesh with the planetary gears to achieve connection and power transmission. Whether for initial connection or subsequent maintenance and replacement, the insertion hole on the planetary gear reducer is often too large, resulting in a lack of precise positioning guidance for the sun gear during insertion and meshing. This makes it difficult to ensure alignment with the planetary gear center, often requiring multiple adjustments to complete meshing, leading to inconvenience in the connection. Utility Model Content

[0003] The purpose of this invention is to solve the problem mentioned in the background art that, during actual connection, the insertion hole on the planetary gear reducer is too large, and the sun gear lacks precise positioning guidance during insertion and meshing, making it impossible to ensure alignment with the center of the planetary gear. This often requires multiple adjustments to complete the meshing, resulting in inconvenience in the connection.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A car tailgate motor includes a motor, a sun gear fixed on the output shaft of the motor, a planetary gear reducer on the upper side of the motor, the planetary gear reducer including a housing, a positioning hole corresponding to the center of the planetary gear reducer being opened at the bottom of the housing, a positioning block being provided on the lower side of the sun gear, the positioning block being fixed to the output shaft of the motor and adapted to the positioning hole.

[0005] Preferably, the housing is provided with a multi-stage planetary gear reduction structure, and the positioning block is inserted and positioned before the sun gear contacts the multi-stage planetary gear reduction structure.

[0006] Preferably, the upper end of the positioning block has a conical surface.

[0007] Preferably, a drive shaft is rotatably connected to the upper side of the housing, and an abutment block is provided on the upper side of the housing to abut the drive shaft.

[0008] Preferably, a fixing plate is fixed to the top of the box, and a rod is slidably disposed on the fixing plate, with one end of the rod passing through the fixing plate and fixedly connected to the abutment block.

[0009] Preferably, the fixing plate has a groove, and a spring is sleeved on the rod inside the groove, with the two ends of the spring abutting against the bottom wall of the groove and the rod, respectively.

[0010] Preferably, the abutment block is made of rubber material.

[0011] Preferably, a ring plate is fixed on the drive shaft, and the rod slides longitudinally.

[0012] Preferably, the inner wall of the groove is provided with an inclined limiting groove, and a limiting protrusion is fixed on the rod body.

[0013] Preferably, a limiting strip is provided in the groove.

[0014] Compared with the prior art, the present invention has the following beneficial effects: By matching the positioning block on the motor output shaft with the positioning hole at the bottom of the planetary gear reducer, the positioning block is inserted into the positioning hole before the sun gear is inserted. This can accurately guide the sun gear to correspond to the center of the multi-stage planetary gear reduction structure, solving the problem of difficulty in aligning the center of the planetary gear due to the large insertion hole and lack of precise guidance. This makes it easier to achieve meshing between the sun gear and the multi-stage planetary gear reduction structure without multiple adjustments. The use of abutment blocks and other structures can reduce axial runout during high-speed rotation of the drive shaft, thereby improving output stability. After the sun gear is positioned, the planetary gear reducer or motor can be rotated to complete the meshing, simplifying the installation operation and improving the installation efficiency of the initial connection between the car tailgate motor and the planetary gear reducer, as well as subsequent maintenance and replacement connections. This reduces the installation difficulty, and the abutment blocks, fixing plates, and the internal structure of the fixing plates do not increase the radial and axial area, which helps to reduce the space occupied. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the positioning hole of this utility model.

[0018] Figure 3 This is a schematic diagram of the planetary gear reducer of this utility model.

[0019] Figure 4 This is a schematic diagram of the multi-stage planetary gear reduction of this utility model.

[0020] Figure 5 This is a schematic diagram of the positioning block of this utility model.

[0021] Figure 6 This is a schematic diagram of the annular piece and the abutting block of this utility model.

[0022] Figure 7 This is a schematic diagram of the internal structure of the fixing plate of this utility model.

[0023] Figure 8 This is a schematic diagram of the inclined limiting groove of this utility model.

[0024] Drawing number explanation: 1. Motor; 11. Sun gear; 12. Positioning block; 2. Planetary gear reducer; 21. Housing; 22. Positioning hole; 23. Multi-stage planetary gear reduction structure; 231. First-stage planetary gear set; 232. Second-stage planetary gear set; 233. Third-stage planetary gear set; 24. Drive shaft; 25. Ring plate; 3. Abutment block; 4. Fixing plate; 41. Groove; 42. Inclined limiting groove; 5. Rod; 6. Spring; 7. Limiting protrusion; 8. Limiting strip. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings.

[0026] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0027] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0028] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0029] Please see Figure 1 - Figure 8The car tailgate motor includes a motor 1, a sun gear 11 fixed on the output shaft of the motor 1, a planetary gear reducer 2 on the upper side of the motor 1, the planetary gear reducer 2 includes a housing 21, the bottom of the housing 21 has a positioning hole 22 corresponding to the center of the planetary gear reducer 2, a positioning block 12 is provided on the lower side of the sun gear 11, the positioning block 12 is a cylinder, the upper end of the positioning block 12 has a conical surface, the positioning block 12 is fixed to the output shaft of the motor 1, the output shaft of the motor 1 passes through the center of the positioning block 12 and is adapted to the positioning hole 22. The housing 21 contains a multi-stage planetary gear reduction structure 23, which includes a first-stage planetary gear set 231, a second-stage planetary gear set 232, and a third-stage planetary gear set 233 that mesh with the housing 21. The third-stage planetary gear set 233 drives the transmission shaft 24. The multi-stage planetary gear reduction structure 23 is existing technology. The diameter of the sun gear 11 is smaller than the diameter of the positioning block 12. The positioning block 12 is already inserted and positioned before the sun gear 11 contacts the multi-stage planetary gear reduction structure 23. This solves the problem of difficulty in aligning the planetary gear center due to an excessively large insertion hole and lack of precise guidance, making it easier to mesh the sun gear with the multi-stage planetary gear reduction structure without requiring multiple adjustments.

[0030] A transmission gear is fixed at the top of the transmission shaft 24. An abutment block 3 is provided on the upper side of the housing 21 to abut against the transmission shaft 24. The abutment block 3 is made of polyurethane elastomer, which has good elasticity and excellent wear resistance. The abutment block 3 reduces the axial runout of the transmission shaft 24 when it rotates at high speed by abutting, so as to keep it stable. This makes the multi-stage planetary gear reduction structure 23 inside the housing 21 stable, and facilitates the connection between the sun gear 11 and the multi-stage planetary gear reduction structure 23.

[0031] A fixing plate 4 is fixed to the top of the box 21. A rod 5 is slidably mounted on the fixing plate 4. One end of the rod 5 passes through the fixing plate 4 and is fixedly connected to the abutment block 3.

[0032] A groove 41 is provided on the fixed plate 4, the groove 41 faces the drive shaft 24, and a spring 6 is sleeved on the rod 5 inside the groove 41. The two ends of the spring 6 abut against the bottom wall of the groove 41 and the rod 5 respectively.

[0033] A ring plate 25 is fixed on the drive shaft 24, and the rod 5 can slide longitudinally on the fixed plate 4. The ring plate 25 and the end face of the housing 21 are spaced apart and do not contact each other, thus reducing friction.

[0034] An inclined limiting groove 42 is formed on the inner wall of the groove 41, and a limiting protrusion 7 is fixed on the rod 5. The limiting protrusion 7 needs to rotate a certain angle. A limiting strip 8 is provided in the groove 41 to prevent the limiting protrusion 7 from rotating excessively. After the limiting protrusion 7 rotates, it contacts the inner wall of the inclined limiting groove 42 to reduce the vertical height of the abutment block 3. The abutment block 3 is used to keep the transmission shaft 24 and the multi-stage planetary gear reduction structure 23 stable. After the sun gear 11 is positioned, the planetary gear reduction box 2 or the motor 1 can be rotated to complete the meshing, simplifying the installation operation, improving the installation efficiency, and reducing the installation difficulty. In this embodiment, the rotation direction of the transmission shaft 24 is unidirectional, that is, the driving limiting protrusion 7 moves towards the direction of the narrow groove wall of the inclined limiting groove 42 to reduce the possibility of the abutment block 3 disengaging from the transmission shaft 24. The structure of the abutment block 3, the fixing plate 4, and the internal structure of the fixing plate 4 does not increase the radial and axial area, which helps to reduce the space occupied.

[0035] In use, first move the rod body 5 down so that the abutment block 3 contacts the ring plate 25, and the spring 6 is compressed. Then rotate the rod body 5, and the limiting protrusion 7 rotates into the inclined limiting groove 42 until the limiting protrusion 7 is stuck with the side wall of the inclined limiting groove 42. After stopping the rotation, the elastic force of the spring 6 keeps the rod body 5 stable, so that the abutment block 3 is stable, and thus keeps the transmission shaft 24 and the multi-stage planetary gear reduction structure 23 stable. Then, the sun gear 11 is inserted into the positioning hole 22, and then the positioning block 12 enters the positioning hole 22, so that the sun gear 11 corresponds to the center of the multi-stage planetary gear reduction structure 23. At this time, simply rotate the planetary gear reducer 2 or the motor 1 to complete the meshing of the sun gear 11 with the multi-stage planetary gear reduction structure 23. Finally, release the contact between the abutment block 3 and the transmission shaft 24.

[0036] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A car tailgate motor, characterized in that, The device includes a motor (1), a sun gear (11) fixed on the output shaft of the motor (1), a planetary gear reducer (2) on the upper side of the motor (1), the planetary gear reducer (2) includes a housing (21), the bottom of the housing (21) is provided with a positioning hole (22) corresponding to the center of the planetary gear reducer (2), a positioning block (12) is provided on the lower side of the sun gear (11), the positioning block (12) is fixed to the output shaft of the motor (1) and is adapted to the positioning hole (22).

2. The automobile tailgate motor according to claim 1, characterized in that: The housing (21) is equipped with a multi-stage planetary gear reduction structure (23), and the positioning block (12) is inserted and positioned before the sun gear (11) contacts the multi-stage planetary gear reduction structure (23).

3. The automobile tailgate motor according to claim 1, characterized in that: The upper end of the positioning block (12) has a conical surface.

4. The automobile tailgate motor according to claim 1, characterized in that: The upper side of the housing (21) is rotatably connected to a drive shaft (24), and an abutment block (3) is provided on the upper side of the housing (21) to abut the drive shaft (24).

5. The automobile tailgate motor according to claim 4, characterized in that: The top of the box (21) is fixed with a fixing plate (4), and a rod (5) is slidably arranged on the fixing plate (4). One end of the rod (5) passes through the fixing plate (4) and is fixedly connected to the abutment block (3).

6. The automobile tailgate motor according to claim 5, characterized in that: The fixing plate (4) has a groove (41) and a spring (6) is sleeved on the rod (5) inside the groove (41). The two ends of the spring (6) abut against the bottom wall of the groove (41) and the rod (5) respectively.

7. The automobile tailgate motor according to claim 5, characterized in that: The abutment block (3) is made of rubber material.

8. The automobile tailgate motor according to claim 7, characterized in that: A ring plate (25) is fixed on the drive shaft (24), and the rod (5) slides longitudinally.

9. The automobile tailgate motor according to claim 6, characterized in that: An inclined limiting groove (42) is provided on the inner wall of the groove (41), and a limiting protrusion (7) is fixed on the rod body (5).

10. The automobile tailgate motor according to claim 9, characterized in that: A limiting strip (8) is provided inside the groove (41).

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