CN219795980U

CN219795980U - Plastic gearbox for back door stay bar

Info

Publication number: CN219795980U
Application number: CN202320334126.7U
Authority: CN
Inventors: 黄森荣
Original assignee: Ningbo Huakai Electronic Technology Co ltd
Current assignee: Ningbo Huakai Electronic Technology Co ltd
Priority date: 2023-02-16
Filing date: 2023-02-16
Publication date: 2023-10-03
Anticipated expiration: 2033-02-16

Abstract

The utility model discloses a plastic gearbox for a back door stay bar, which comprises a shell, wherein the inner wall of the shell forms a tooth part, and a speed reducing mechanism connected with a motor or a stay bar is arranged in the shell; the speed reducing mechanism is provided with at least one stage of planetary speed reducing mechanism, the one stage of planetary speed reducing mechanism comprises an integrated shaft bracket, one stage of planetary gears and a planetary carrier, the one stage of planetary gears are rotationally arranged on the planetary carrier through the integrated shaft bracket, the integrated shaft bracket is embedded in the planetary carrier, the periphery of the one stage of planetary gears is meshed with the tooth part, a first input part for placing an output shaft of a power supply machine is arranged between the one stage of planetary gears, and a first output part for connecting a supporting rod or the planetary speed reducing mechanism is arranged on the planetary carrier.

Description

Plastic gearbox for back door stay bar

Technical Field

The utility model relates to the technical field of electric stay bars, in particular to a plastic gearbox for a back door stay bar.

Background

Along with the increasing of social economy level, automobiles are popularized in the life of people, the demands of people on automobile functions are higher and higher, the automatic opening and closing function of automobile tail doors becomes the standard function of the current automobiles, the tail door electric supporting rod is an actuating mechanism for realizing the opening or closing operation of the tail doors in an electric tail door system, is a special component for adjusting the opening of the tail doors, a gear box is used as an important component of the tail door electric supporting rod to increase the motor torque, the two-stage planetary gear is compact in structure, the output of large torque and large transmission ratio required by the electric supporting rod can be realized, the stable operation of the tail doors can be ensured, and the tail doors can be smoothly opened and closed.

For example, "a gear box for a supporting rod" disclosed in publication No. CN216242072U "includes a housing, a first-stage reduction mechanism and a second-stage reduction mechanism, where the first-stage reduction mechanism includes an input gear, a planet carrier, a first planet wheel disposed on the planet carrier and meshed with the input gear, and a first internal gear disposed on the housing and meshed with the first planet wheel, the second-stage reduction mechanism includes a first output portion, a first fixing support, a second planet wheel disposed on the first fixing support and meshed with the first output portion, and a second first output portion meshed with the second planet wheel, the first output portion is integrated with the planet carrier, the first fixing support includes a first fixing plate and a first pin shaft disposed on the first fixing plate, the second planet wheel is sleeved on the first pin shaft, and a through hole for allowing the first output portion to pass is disposed at the center of the first fixing plate.

However, the gearboxes of the prior art suffer from the following drawbacks: the fixed bolster that is used for fixed planet wheel when current gear box assembly adopts traditional pivot mode, and this kind of mode can increase part quantity, and is with high costs, and can lead to the assembly mode more complicated, causes efficiency to reduce.

Disclosure of Invention

In order to solve the technical problems in the background technology, the utility model provides a plastic gearbox for a back door stay bar.

The utility model solves the technical problems by adopting the following technical scheme:

the plastic gearbox for the back door stay bar comprises a shell, wherein teeth are formed on the inner wall of the shell, and a speed reducing mechanism connected with a motor or the stay bar is arranged in the shell;

the speed reducing mechanism is provided with at least one stage of planetary speed reducing mechanism, the one stage of planetary speed reducing mechanism comprises an integrated shaft bracket, one stage of planetary gears and a planetary carrier, the one stage of planetary gears are rotationally arranged on the planetary carrier through the integrated shaft bracket, the integrated shaft bracket is embedded in the planetary carrier, the periphery of the one stage of planetary gears is meshed with the tooth part, a first input part for placing an output shaft of a power supply machine is arranged between the one stage of planetary gears, and a first output part for connecting a supporting rod or the planetary speed reducing mechanism is arranged on the planetary carrier.

Preferably, a second-level planetary reduction mechanism is further arranged between the shell and the first-level planetary reduction mechanism, the second-level planetary reduction mechanism comprises a fixing frame, a second-level planetary gear and an output frame, the second-level planetary gear is rotationally arranged on the output frame through the fixing frame, the fixing frame is embedded in the output frame, the second-level planetary gear is meshed with the first output part and meshed with the tooth part, and an internal spline connected with an electric stay bar is arranged at the top of the output frame. Through the improvement, a two-stage planetary reduction mechanism is added, the transmission ratio is increased, and the torque is increased.

Preferably, the integrated shaft bracket and the fixed frame comprise a fixed plate and a fixed shaft arranged on the fixed plate, and the fixed plate and the fixed shaft are integrally formed. Through above improvement, fixed plate and fixed axle integrated into one piece form integral type pedestal and fixation clamp, cancelled traditional pivot mode and assembled, the part is few, with low costs, and makes whole reduction gears more stable, practical life is longer.

Preferably, the planet carrier and the output carrier are provided with fixing holes for fixing the shafts, and grooves for fixing the plates are formed in the bottoms of the planet carrier and the output carrier. Through the improvement, the fixed shaft of the integrated shaft bracket and the fixed bracket is inserted into the inverted fixed hole, so that the primary planet wheel and the secondary planet wheel can be fixed in the planetary bracket and the output bracket, and the fixed plate is arranged in the grooves at the bottoms of the planetary bracket and the output bracket, so that the whole speed reducing mechanism operates more stably.

Preferably, the outer periphery of the shell is wrapped with a damping cushion. Through the improvement, the vibration and noise of the gear box in the running process are reduced, and the back door stay bar is quieter and more stable in running.

Preferably, the bottom of the shell is provided with a base, a first clamping table is formed on the base, a second clamping table is formed on the shell, and the first clamping table and the second clamping table are matched so that the base is fixed on the shell. Through the improvement, the first clamping table is matched with the second clamping table, so that the base is fixed on the shell, and the common screw and laser welding fixing mode is replaced, so that the assembly process is simpler, the number of parts is reduced, and the manufacturing cost is reduced.

Preferably, the first output portion is integrally provided with the carrier. Through above improvement, first output and planet carrier integration have improved the structural strength of whole planet carrier, make to rotate more steadily.

Preferably, the planet carrier is arranged on the base, and a gasket is arranged between the base and the planet carrier. Through the improvement, the planet carrier does not directly rub with the base when rotating, and the service life of the whole planet carrier is prolonged.

Preferably, the internal spline is arranged on the output frame through powder metallurgy. Through the improvement, the internal spline is arranged on the output frame by adopting a powder metallurgy technology, so that the structural strength of the internal spline is increased, and the internal spline can bear larger torque.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

the first-stage planetary gear on the planetary carrier and the second-stage planetary gear on the output carrier are respectively fixed through the integrated shaft bracket and the fixed frame, the integrated shaft bracket and the fixed frame comprise a fixed plate and a fixed shaft of the fixed plate on the base, the fixed plate and the fixed shaft are integrally formed, the traditional shaft pin mode is omitted for assembly, the parts are few, the cost is low, and the whole speed reducing mechanism is more stable and has longer service life;

the planet carrier and the output carrier are provided with fixing holes for fixing the shafts, grooves for fixing the plates are formed in the bottoms of the planet carrier and the output carrier, the whole integrated shaft carrier and the fixing frame are completely embedded in the planet carrier and the output carrier, and stability in operation is further improved.

Drawings

FIG. 1 is an exploded view of the overall structure of the present utility model;

FIG. 2 is a cross-section of the overall structure of the present utility model;

FIG. 3 is a schematic diagram of a primary planetary reduction mechanism according to the present utility model;

FIG. 4 is a schematic diagram of a two-stage planetary reduction mechanism according to the present utility model;

FIG. 5 is a cross-sectional view of the primary planetary reduction mechanism drive of the present utility model;

FIG. 6 is a cross-sectional view of a secondary planetary reduction mechanism drive of the present utility model;

FIG. 7 is a schematic view of a planet carrier according to the present utility model;

FIG. 8 is a schematic view of the structure of the output rack of the present utility model;

FIG. 9 is a schematic structural view of a fixing frame of the present utility model;

FIG. 10 is a schematic structural view of an integrated pedestal of the present utility model;

FIG. 11 is a schematic view of the structure of the housing of the present utility model;

FIG. 12 is a schematic view of the structure of the base of the present utility model;

in the figure: 1. a housing; 2. a primary planetary reduction mechanism; 3. a secondary planetary reduction mechanism; 4. a tooth portion; 5, a base; 6. a speed reducing mechanism; 101. an integral shaft bracket; 102. a first-stage planet wheel; 103. a planet carrier; 104. a first output section; 105. a first input section; 201. a second-stage planetary gear; 202. an output rack; 203. an internal spline; 204. a fixing frame; 301. a fixing plate; 302. a fixed shaft; 303. a fixing hole; 304. a groove; 305. a damping cushion; 401. a first clamping table; 402. the second clamping table; 403. a gasket; 405. a mounting cavity;

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It will be understood that, although the terms upper, middle, lower, top, end, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another for ease of understanding and are not used to define any directional or sequential limitation.

As shown in fig. 1-12, a plastic gearbox for a back door stay bar comprises a shell 1, wherein teeth 4 are formed on the inner wall of the shell 1, a speed reducing mechanism 6 connected with a motor or a stay bar is arranged in the shell 1, and a base 5 is arranged at the bottom of the shell 1;

the speed reducing mechanism 6 is provided with at least one stage of planetary speed reducing mechanism 2, the one stage of planetary speed reducing mechanism 2 comprises an integrated shaft bracket 101, one stage of planetary wheels 102 and a planetary frame 103, the one stage of planetary wheels 102 are rotationally arranged on the planetary frame 103 through the integrated shaft bracket 101, a first input part 105 is arranged between the one stage of planetary wheels 102, the first input part 105 forms a space for an output shaft of a motor to be placed in, the periphery of the one stage of planetary wheels 102 is meshed with the tooth part 4, a first output part 104 is formed on the planetary frame 103, and the first output part 104 can be connected with the two stage of planetary speed reducing mechanism 3 or form transmission connection with a supporting rod according to actual use conditions.

As an implementation mode that the first output part 104 is connected with the second-stage planetary reduction mechanism 3, a second-stage planetary reduction mechanism 3 is further arranged between the shell 1 and the first-stage planetary reduction mechanism 2, the second-stage planetary reduction mechanism 3 comprises a fixing frame 204, a second-stage planetary wheel 201 and an output frame 202, the second-stage planetary wheel 201 is rotationally arranged on the output frame 202 through the fixing frame 204, the fixing frame 204 is embedded on the output frame 202, the second-stage planetary wheel 201 is meshed with the first output part 104 and meshed with the tooth part 4, and an internal spline 203 connected with an electric stay rod is arranged at the top of the output frame 202.

As a further explanation of the whole transmission process of the gearbox, the output shaft of the motor is placed between the first-stage planetary gears 102, the output shaft of the motor rotates to drive the first-stage planetary gears 102 to rotate, the first-stage planetary gears 102 are meshed with the teeth 4 on the inner wall of the shell 1 and drive the whole planetary frame 103 to rotate, the first output part 104 on the planetary frame 103 rotates, as the first output part Zhou Gendi in the second-stage planetary gears 201 is meshed with the first output part 104, when the first output part 104 rotates the second-stage planetary gears 201 to rotate along with the first output part 104, the periphery of the second-stage planetary gears 201 is meshed with the teeth 4 of the shell 1, so that the second-stage planetary gears 201 can drive the whole output frame 202 to rotate together when rotating, and the output frame 202 is connected with the electric stay rod, so that the tail gate can run stably and be opened and closed smoothly.

As shown in fig. 9 and 10, regarding further explanation of the integral shaft bracket 101 and the fixing bracket 204 in this embodiment, the integral shaft bracket 101 and the fixing bracket 204 include a fixing plate 301 and a fixing shaft 302 of the fixing plate 301 on the base 5, and the fixing plate 301 and the fixing shaft 302 are integrally formed, so that the conventional shaft pin manner is omitted for assembly, the parts are fewer, the cost is low, and the whole speed reducing mechanism is more stable and has longer service life.

As shown in fig. 7 and 8, further, fixing holes 303 are formed in the planet carrier 103 and the output carrier 202 for placing the fixing shafts 302, grooves 304 are formed in the bottoms of the planet carrier 103 and the output carrier 202 for placing the fixing plates 301, and the fixing shafts 302 of the integrated shaft carrier 101 and the fixing frame 204 are inserted into the inverted fixing holes 303, so that the primary planet 102 and the secondary planet 201 can be fixed in the planet carrier 103 and the output carrier 202, and the fixing plates 301 are placed in the grooves 304 in the bottoms of the planet carrier 103 and the output carrier 202, so that the whole speed reducing mechanism operates more stably.

As shown in fig. 2, 3 and 5, as a further explanation of the assembly of the primary planetary reduction mechanism 2 and the secondary planetary reduction mechanism 3, the primary planetary reduction mechanism 2 includes an integral shaft carrier 101, a primary planetary gear 102 and a planetary carrier 103, the integral shaft carrier 101 is disposed on the base 5, the integral shaft carrier 101 of the primary planetary reduction mechanism 2 includes a fixing plate 301 and three fixing shafts 302, three mounting cavities 405 are disposed on the planetary carrier 103, the primary planetary gear 102 is rotatably disposed in the mounting cavities 405, the fixing shafts 302 pass through fixing holes 303 on the planetary carrier 103, so that the primary planetary gear 102 is rotatably disposed on the planetary carrier 103, and the primary planetary gear 102 is meshed with the teeth 4 on the inner wall of the housing 1.

The gear box is internally provided with the tooth parts 4 of the primary planetary reduction mechanism 2 and the secondary planetary reduction mechanism 3, so that the parts of the whole gear box are reduced, the assembly efficiency is improved, and the operation is more stable.

As shown in fig. 1, further, a spacer 403 is arranged between the base 5 and the planet carrier 103, so that the planet carrier 103 does not directly rub against the base 5 when rotating, the overall service life is prolonged, the axial clearance is reduced, and the engagement of the speed reducing mechanism is more stable.

Preferably, the first output part 104 and the planet carrier 103 are integrally arranged, so that the structural strength of the whole planet carrier 103 is improved, and the rotation is more stable.

As shown in fig. 2, 4 and 6, specifically, the secondary planetary reduction mechanism 3 includes a fixing frame 204, a secondary planetary gear 201 and an output frame 202, the output frame 202 is coaxially disposed on the planetary frame 103, the fixing frame 204 and the secondary planetary reduction mechanism 3 include a fixing plate 301 and four fixing shafts 302, four mounting cavities 405 are disposed on the output frame 202, the secondary planetary gear 201 is rotatably disposed in the mounting cavities 405, the fixing shafts 302 pass through the output upper fixing holes 303, so that the secondary planetary gear 201 is rotatably disposed on the output frame 202, at this time, the inner circumference of the secondary planetary gear 201 is meshed with the first output portion 104, the outer circumference is meshed with the tooth portion 4 on the inner wall of the housing 1, and the internal spline 203 on the top of the output frame 202 is connected with a tail gate stay.

As shown in FIG. 1, the internal spline 203 is preferably a powder metallurgy and is integrally formed on the output carrier 202 so that the internal spline 203 is structurally strong and can withstand greater torque.

As further explanation of the cooperation between the base 5 and the housing 1 in this embodiment, as shown in fig. 2, 11 and 12, a first clamping table 401 is formed on the base 5, and a second clamping table 402 is formed on the housing 1, where the first clamping table 401 and the second clamping table 402 cooperate, so that the base 5 is fixed on the housing 1, and the common screw and laser welding fixing manner is replaced, so that the assembly process is simpler, the number of parts is reduced, and the manufacturing cost is reduced.

As shown in fig. 1, the damping cushion 305 is preferably wrapped around the outer periphery of the housing 1, so that vibration and noise of the gear box during operation are reduced, and the back door stay is quieter and more stable during operation.

Further, the housing 1 is made of plastic.

The present embodiment is only for explanation of the present utility model and is not to be construed as limiting the present utility model, and modifications to the present embodiment, which may not creatively contribute to the present utility model as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present utility model.

Claims

1. The plastic gearbox for the back door stay bar comprises a shell (1) and is characterized in that a damping cushion (305) is wrapped on the periphery of the shell (1), a tooth part (4) is formed on the inner wall of the shell, and a speed reducing mechanism (6) connected with a motor or a stay bar is arranged in the shell (1);

the speed reducing mechanism (6) is provided with at least one-stage planetary speed reducing mechanism (2), the one-stage planetary speed reducing mechanism (2) comprises an integrated shaft bracket (101), one-stage planetary gears (102) and a planetary frame (103), the one-stage planetary gears (102) are rotationally arranged on the planetary frame (103) through the integrated shaft bracket (101), the integrated shaft bracket (101) is embedded in the planetary frame (103), the periphery of the one-stage planetary gears (102) is meshed with the tooth part (4), a first input part (105) for placing an output shaft of a power supply machine is arranged between the one-stage planetary gears (102), and a first output part (104) for connecting a supporting rod or the two-stage planetary speed reducing mechanism (3) is arranged on the planetary frame (103).

2. The plastic gearbox for the back door stay bar according to claim 1, wherein a secondary planetary reduction mechanism (3) is further arranged between the shell (1) and the primary planetary reduction mechanism (2), the secondary planetary reduction mechanism (3) comprises a fixing frame (204), a secondary planet wheel (201) and an output frame (202), the secondary planet wheel (201) is rotationally arranged on the output frame (202) through the fixing frame (204), the fixing frame (204) is embedded in the output frame (202), the secondary planet wheel (201) is meshed with the first output part (104) and meshed with the tooth part (4), and an internal spline (203) connected with the electric stay bar is arranged at the top of the output frame (202).

3. A plastic gearbox for a back door stay according to claim 2, wherein the integrated bracket (101) and the fixed frame (204) comprise a fixed plate (301) and a fixed shaft (302) arranged on the fixed plate (301), and the fixed plate (301) and the fixed shaft (302) are integrally formed.

4. A plastic gearbox for a back door stay according to claim 2, wherein the planet carrier (103) and the output carrier (202) are provided with fixing holes (303) for placing fixing shafts (302), and grooves (304) for placing fixing plates (301) are formed in the bottoms of the planet carrier (103) and the output carrier (202).

5. A plastic gearbox for a back door stay according to claim 1, wherein a base (5) is provided at the bottom of the housing (1), a first clamping table (401) is formed on the base (5), a second clamping table (402) is formed on the housing (1), and the first clamping table (401) and the second clamping table (402) cooperate to fix the base (5) on the housing (1).

6. A back door stay plastic gearbox according to claim 1, characterized in that the first output (104) is provided integrally with the planet carrier (103).

7. A plastic gearbox for a back door stay according to claim 5, characterized in that the planet carrier (103) is arranged on the base (5), a spacer (403) being arranged between the base (5) and the planet carrier (103).

8. A back door stay plastic gearbox according to claim 2, characterized in that the internal spline (203) is arranged on the output carrier (202) by powder metallurgy.