CN115848483A - Linear driving device for automobile steering wheel - Google Patents
Linear driving device for automobile steering wheel Download PDFInfo
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- CN115848483A CN115848483A CN202211529703.4A CN202211529703A CN115848483A CN 115848483 A CN115848483 A CN 115848483A CN 202211529703 A CN202211529703 A CN 202211529703A CN 115848483 A CN115848483 A CN 115848483A
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Abstract
The invention discloses a linear driving device for an automobile steering wheel, which comprises a motor body, a reduction gear box, a left-handed screw rod and a right-handed screw rod, wherein the reduction gear box consists of an upper end cover component, a lower end cover component, a planetary reduction mechanism and a parallel shaft reduction mechanism, the planetary reduction mechanism comprises a sun wheel, an inner gear ring, a planet wheel, a planet shaft, a planet carrier and an output shaft, the parallel shaft reduction mechanism comprises a central wheel, an idler wheel, a left-handed output wheel and a right-handed output wheel, the sun wheel is driven when the motor rotates forwards and backwards, the planet carrier and the output shaft are driven by the planet wheel to serve as power output for reducing speed and increasing torque, the power can be transmitted to the central wheel connected with the output shaft when the output shaft rotates forwards and backwards, and the power is further transmitted to the left-handed output wheel and the right-handed output wheel by the idler wheel. The invention has compact and small structure, small occupied space, high efficiency and low cost, and can control the horizontal movement of the objects connected with the left and right screw rods by one motor.
Description
Technical Field
The invention relates to the field of electric adjustment of an automobile steering wheel, in particular to a linear driving device of the automobile steering wheel.
Background
The flexible power supply that is passed through the motor through car steering wheel is through decelerator increase moment of torsion and change rotary motion into rectilinear motion and then drive steering wheel in order to reach linear concertina movement, and the position through the electric regulation steering wheel is in order to reach user's comfortable experience.
At present, in the field of automobiles, especially in the field of electric adjustment of steering wheels of automobiles, a common driving device uses a motor as a power source, and in order to obtain a suitable linear output speed, in practical application, the motor needs to be decelerated. The current commonly adopted mode is to directly connect a motor as a power source to a speed reducer to realize speed reduction, and a primary worm and helical gear or worm gear speed reduction and screw nut device are arranged in the speed reducer to finish the linear output speed of the steering wheel with a certain speed ratio. The current market widely uses a single motor to control a single linear speed reducer, and the output screw rod and the motor are arranged in a mutually perpendicular mode, so that the structure not only occupies a large space, but also has low transmission efficiency of a worm and a bevel gear or a worm wheel. Therefore, how to design a linear telescopic driving device for an automobile, which has a compact structure, occupies a small space and has high efficiency, is a technical problem to be solved at present.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides a linear driving device for an automobile steering wheel, which directly connects and fixes a motor and a speed reducer, wherein screw rods and the axis of the motor are arranged in parallel, the whole device has compact and small structure, small occupied space, high efficiency and low cost, and can control the horizontal movement of objects connected with two left and right screw rods by one motor, and the structure is more compact than the structure that the conventional single motor can only control the horizontal movement of the objects connected with a single screw rod in the market.
In order to achieve the purpose, the invention adopts the technical scheme that: a linear driving device of an automobile steering wheel comprises a motor body, a reduction gear box, a left-handed screw rod and a right-handed screw rod, wherein the reduction gear box mainly comprises an upper end cover assembly, a lower end cover assembly, a planetary reduction mechanism and a parallel shaft reduction mechanism;
the planetary reduction mechanism comprises a sun gear, an inner gear ring, a planetary gear, a planetary shaft, a planetary carrier and an output shaft, the inner gear ring is matched and installed with the lower end cover, the planetary shaft and the output shaft are riveted on the planetary carrier through rigidity, the installed output shaft extends into the lower end cover, the sun gear is sleeved on the output shaft of the motor, the planetary gear is arranged in the inner gear ring and arranged around the sun gear, the planetary gear is installed on the corresponding planetary shaft through a center hole of the planetary gear and can freely rotate around the planetary shaft, and the installed planetary gear is respectively meshed with the inner gear of the inner gear ring and the outer gear of the sun gear;
parallel shaft reduction gears includes centre wheel, idler, levogyration output wheel and dextrorotation output wheel, the centre wheel suit is on the output shaft and along with the output shaft rotates, the idler meshes with the centre wheel mutually, still meshes with levogyration output wheel and dextrorotation output wheel mutually simultaneously, levogyration output wheel and dextrorotation output wheel suit respectively on levogyration lead screw and dextrorotation lead screw, levogyration lead screw and dextrorotation lead screw all with output shaft parallel arrangement to upper end cover and lower end cover are stretched out to the both ends of levogyration lead screw and dextrorotation lead screw.
Furthermore, the upper end cover assembly comprises an upper end cover bearing and an upper end cover, an upper end cover bearing hole is correspondingly formed in the upper end cover, and the upper end cover bearing hole and the corresponding upper end cover bearing are fixedly connected through rigid pressing.
Furthermore, the lower end cover component comprises a lower end cover bearing, a pin shaft and a lower end cover, a lower end cover bearing hole and a pin shaft hole are correspondingly formed in the lower end cover, and the lower end cover bearing hole and the pin shaft hole are fixedly connected with the corresponding lower end cover bearing and the pin shaft through rigid pressing.
Furthermore, the idle wheel and a pin shaft on the lower end cover assembly are arranged on the pin shaft through self center holes and can rotate freely.
Furthermore, the lower end cover is provided with an inner gear ring mounting hole for mounting an inner gear ring, positioning bosses are arranged around the bottom of the inner gear ring mounting hole, and positioning notches matched with the positioning bosses are correspondingly arranged around the end part of the inner gear ring.
Furthermore, the left-handed screw rod and the right-handed screw rod are respectively matched with the corresponding left-handed output wheel and the right-handed output wheel through trapezoidal threads.
Furthermore, the two opposite ends of the left-handed screw rod and the right-handed screw rod are respectively provided with a connector.
Furthermore, connectors are respectively arranged at two ends of the outer side of the left-handed screw rod and two ends of the outer side of the right-handed screw rod, friction check rings and positioning rings are respectively arranged at two ends of the inner side of the left-handed screw rod and the right-handed screw rod, and the connectors and the positioning rings are fixedly connected to two ends of the screw rods through riveting to serve as limiting devices.
The beneficial effects of the invention are:
(1) The device can control the horizontal movement of the object connected with the left screw rod and the right screw rod through one motor, and is more effective than a conventional device which can only control the horizontal movement of the object connected with a single screw rod through a single motor on the market;
(2) The screw rod and the motor are arranged in parallel, so that the installation and use space of the device can be saved compared with the situation that the motor and the screw rod are arranged at 90 degrees on the market;
(3) The threads on the two screw rods of the device have the characteristics of left rotation and right rotation, so that when the left-rotation screw rod and the right-rotation screw rod output power to pull an object, the moving speed is faster and more effective;
(4) The device adopts a planetary speed reducing mechanism and a parallel shaft speed reducing mechanism, and has higher efficiency than the worm bevel gear and worm gear speed reducing mechanisms commonly used in the market.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the internal structure of the present invention;
FIG. 3 is an exploded view of the present invention;
FIG. 4 is a schematic structural view of the planetary reduction mechanism of the present invention;
FIG. 5 is a schematic view of the parallel axis retarding mechanism of the present invention;
FIG. 6 is a schematic view of the upper end cap assembly of the present invention;
FIG. 7 is a schematic view of the construction of the lower endcap assembly of the present invention;
FIG. 8 is a schematic view of the upper end cap structure of the present invention;
FIG. 9 is a schematic view showing the inside and outside structures of the lower cap of the present invention, wherein (a) is the outside surface and (b) is the inside surface.
Labeled as: 1-lower end cap, 2-upper end cap bearing (61802), 3-upper end cap bearing (625 ZZ), 4-pin, 5-planet, 6-internal ring gear, 7-hexagon socket head self-tapping screw, 8-center wheel, 9-sun gear, 10-idler, 11-right-hand output wheel, 12-upper end cap, 13-positioning ring, 14-friction retainer, 15-connector, 16-Tr12-2.5-7e right-hand lead screw, 17-cross pan head screw, 18-Tr12-2.5-7e left-hand lead screw, 19-left-hand output wheel, 20-motor body (4510 motor assembly), 21-planet carrier, 22-planet shaft, 23-output shaft, 24-lower end cap bearing (61802), 25-lower end cap bearing (625 ZZ), 26-upper end cap bearing hole, 27-lower end cap bearing hole, 28-notch positioning boss, 29-positioning boss.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
Referring to fig. 1 to 9, the present embodiment provides a linear driving device for a steering wheel of an automobile, which mainly comprises a motor body, a reduction gear box, a left-handed screw rod and a right-handed screw rod, wherein the reduction gear box mainly comprises an upper end cover assembly, a lower end cover assembly, a planetary reduction mechanism and a parallel shaft reduction mechanism. Specifically, the method comprises the following steps:
in this embodiment, the lower end cover assembly is composed of a lower end cover bearing, a pin shaft 4 and a lower end cover 1; wherein, the lower end cover 1 is provided with a lower end cover bearing hole 27 and a pin shaft hole which are correspondingly arranged, and the lower end cover bearing hole 27 and the pin shaft hole are fixedly connected with the corresponding bearing and the pin shaft 4 through rigid pressing.
In this embodiment, the upper end cover assembly is composed of an upper end cover bearing and an upper end cover 12; the upper end cap 12 has an upper end cap bearing hole 26 correspondingly installed therein, and the upper end cap bearing hole 26 and the corresponding upper end cap bearing are fixedly connected by rigid press-fitting.
In this embodiment, the planetary reduction mechanism mainly includes a sun gear 9, an annular gear 6, a planet gear 5, a planet shaft 22, a planet carrier 21, and an output shaft 23. The planet shafts 22 and the output shafts 23 are rigidly riveted on the planet carrier 21, the planet wheels 5 are arranged on the corresponding planet shafts 22 through self center holes and can freely rotate around the planet shafts 22, the planet wheels 5 are arranged in the inner gear ring 6 and surround the sun wheel 9, and the mounted planet wheels 5 are respectively meshed with the inner teeth of the inner gear ring 6 and the outer teeth of the sun wheel 9; the output shaft of the motor 20 is rigidly riveted with the central hole characteristic of the sun gear 9; the inner gear ring 6 is matched and installed with a positioning boss 28 and a round hole feature on the corresponding lower end cover through a positioning notch 29 and a round feature of the inner gear ring.
In this embodiment, the parallel shaft speed reducing mechanism mainly comprises a central wheel 8, an idler wheel 10, a left-handed output wheel 19 and a right-handed output wheel 11. Wherein, the centre wheel 8 and the output shaft 23 are installed together through the notch feature on the output shaft 23, and rotate with the output shaft 23, and the idle wheel 10 and the pin shaft 4 on the lower end cover component are installed on the pin shaft 4 through the center hole of the idle wheel and can rotate freely. The left-handed output wheel 19 and the right-handed output wheel 11 are mounted in bearing holes in the upper and lower end cover assemblies through self-stepped features and can rotate freely.
In the embodiment, the planetary reduction mechanism is arranged in the lower end cover assembly, and after the annular gear 6 is matched and arranged with the lower end cover 1, the output shaft of the motor and the sun gear 9 rigidly connected with the output shaft are arranged in the hole of the lower end cover together and are locked and fixed by screws; then, the central wheel 8, the idler wheel 10, the left-handed output wheel 19 and the right-handed output wheel 11 are respectively fixedly installed with a pin shaft and a bearing hole in the upper end cover assembly and the lower end cover assembly and then are locked and fixed through screws; and the left-handed screw rod 18 and the right-handed screw rod 16 are respectively matched with the corresponding left-handed output wheel 19 and the right-handed output wheel 11 through trapezoidal threads. The connector 15 is respectively arranged at the two ends of the outer side of the left-handed screw rod 18 and the right-handed screw rod 16, the friction retainer ring 14 and the positioning ring 13 are respectively arranged at the two ends of the inner side of the left-handed screw rod and the right-handed screw rod, and the connector 15 and the positioning ring 13 are fixedly connected to the two ends of the screw rods through riveting to serve as limiting devices.
To sum up, the output shaft of the motor of the invention is rigidly riveted with the sun gear 9 as a power source, the inner gear ring 6 is fixed in the lower end cover by the notch of the inner gear ring and the boss of the lower end cover 1, when the motor 20 rotates forward and backward, the sun gear 9 on the motor is driven, at the moment, the inner gear ring 6 is fixed, the planet gear 5 revolves around the output shaft 23 while rotating, and drives the planet carrier 21 and the output shaft 23 to output power for speed reduction and torque increase. When the output shaft 23 rotates in the forward and reverse directions, the power is transmitted to the center wheel 8 connected thereto, and the center wheel 8 further transmits the power to the left-hand output wheel 19 and the right-hand output wheel 11 via the idle wheel 10. And trapezoidal threads matched with the trapezoidal screw rods are arranged in the holes of the left-handed output wheel 19 and the right-handed output wheel 11.
The first condition is as follows: after the connector 15 rigidly fixed together with the left-handed screw 18 is fixed and the connector 15 of the right-handed screw 16 is fixed on the device of the automobile steering wheel, the right-handed output wheel 11 will drive the right-handed screw 16 to move along the axial direction of the right-handed screw 16, so as to drive the automobile steering wheel to move along the axial direction of the right-handed screw 16.
Case two: after the connector 15 rigidly fixed with the right-handed screw 16 is fixed, and the connector 15 of the left-handed screw 18 is fixed on the device of the steering wheel of the automobile, the left-handed output wheel 19 will drive the left-handed screw 18 to move along the axial direction of the left-handed screw 18, so as to drive the steering wheel of the automobile to move along the axial direction of the left-handed screw 18.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the scope of the present invention in any way, and all technical solutions obtained by using equivalent substitution methods fall within the scope of the present invention.
The parts not involved in the present invention are the same as or can be implemented using the prior art.
Claims (8)
1. A linear driving device of an automobile steering wheel is characterized by comprising a motor body, a reduction gear box, a left-handed screw rod and a right-handed screw rod, wherein the reduction gear box mainly comprises an upper end cover assembly, a lower end cover assembly, a planetary reduction mechanism and a parallel shaft reduction mechanism;
the planetary reduction mechanism comprises a sun gear, an inner gear ring, a planetary gear, a planetary shaft, a planetary carrier and an output shaft, the inner gear ring is matched and installed with the lower end cover, the planetary shaft and the output shaft are riveted on the planetary carrier through rigidity, the installed output shaft extends into the lower end cover, the sun gear is sleeved on the output shaft of the motor, the planetary gear is arranged in the inner gear ring and arranged around the sun gear, the planetary gear is installed on the corresponding planetary shaft through a center hole of the planetary gear and can freely rotate around the planetary shaft, and the installed planetary gear is respectively meshed with the inner gear of the inner gear ring and the outer gear of the sun gear;
parallel shaft reduction gears includes centre wheel, idler, levogyration output wheel and dextrorotation output wheel, the centre wheel suit is on the output shaft and along with the output shaft rotation, the idler meshes with the centre wheel mutually, still meshes with levogyration output wheel and dextrorotation output wheel mutually simultaneously, levogyration output wheel and dextrorotation output wheel suit respectively on levogyration lead screw and dextrorotation lead screw, levogyration lead screw and dextrorotation lead screw all with output shaft parallel arrangement to upper end cover and lower end cover are stretched out to the both ends of levogyration lead screw and dextrorotation lead screw.
2. The linear drive device for the steering wheel of the automobile as claimed in claim 1, wherein the upper end cover assembly comprises an upper end cover bearing and an upper end cover, the upper end cover is correspondingly provided with an upper end cover bearing hole, and the upper end cover bearing hole and the corresponding upper end cover bearing are fixedly connected through rigid pressing.
3. The linear driving device for the steering wheel of the automobile as claimed in claim 1, wherein the lower end cover assembly comprises a lower end cover bearing, a pin shaft and a lower end cover, the lower end cover is correspondingly provided with a lower end cover bearing hole and a pin shaft hole, and the lower end cover bearing hole and the pin shaft hole are fixedly connected with the corresponding lower end cover bearing and the pin shaft through rigid pressing.
4. A linear drive device for a steering wheel of an automobile as claimed in claim 3, wherein the idler pulley and the pin of the lower end cover assembly are mounted on the pin through their central holes and are free to rotate.
5. The linear driving device for the steering wheel of the automobile as claimed in claim 1 or 3, wherein the lower end cover is provided with an inner gear ring mounting hole for mounting an inner gear ring, positioning bosses are provided around the bottom of the inner gear ring mounting hole, and positioning notches matched with the positioning bosses are correspondingly provided around the end of the inner gear ring.
6. The linear driving device for the steering wheel of the vehicle as claimed in claim 1, wherein the left-handed screw rod and the right-handed screw rod are respectively engaged with the corresponding left-handed output wheel and the corresponding right-handed output wheel through trapezoidal threads.
7. The linear driving apparatus for a steering wheel of a vehicle as claimed in claim 1, wherein a connector is provided at each of opposite ends of the left-hand screw rod and the right-hand screw rod.
8. The linear driving device for the steering wheel of the automobile as claimed in claim 1, wherein the left-handed screw rod and the right-handed screw rod are respectively provided with a connector at the outer ends thereof and a friction retainer ring and a positioning ring at the inner ends thereof, and the connectors and the positioning rings are fixedly connected to the two ends of the screw rods by riveting to serve as the limiting devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211529703.4A CN115848483A (en) | 2022-11-30 | 2022-11-30 | Linear driving device for automobile steering wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211529703.4A CN115848483A (en) | 2022-11-30 | 2022-11-30 | Linear driving device for automobile steering wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115848483A true CN115848483A (en) | 2023-03-28 |
Family
ID=85668888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211529703.4A Pending CN115848483A (en) | 2022-11-30 | 2022-11-30 | Linear driving device for automobile steering wheel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115848483A (en) |
-
2022
- 2022-11-30 CN CN202211529703.4A patent/CN115848483A/en active Pending
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