CN221443494U

CN221443494U - Novel actuator structure

Info

Publication number: CN221443494U
Application number: CN202323483669.4U
Authority: CN
Inventors: 胡禅; 王鹏伟
Original assignee: Nanjing Bangqi Automatic Transmission Co ltd
Current assignee: Nanjing Bangqi Automatic Transmission Co ltd
Priority date: 2023-12-20
Filing date: 2023-12-20
Publication date: 2024-07-30
Anticipated expiration: 2033-12-20

Abstract

The utility model discloses a novel actuator structure, which comprises a shell, a motor and a worm gear mechanism, wherein the worm gear mechanism comprises a worm wheel and a worm, a shaft sleeve and a ball bearing are arranged on the shell, the shaft sleeve and the ball bearing are respectively arranged at two ends of the worm, and the shaft sleeve and the ball bearing are arranged to bear axial force from the worm. According to the actuator structure, the ball bearing is matched with the shaft sleeve to support the worm, so that the design of low cost and miniaturization of a product is realized, and the installation difficulty can be reduced.

Description

Novel actuator structure

Technical Field

The utility model belongs to the technical field of speed changers, and particularly relates to a novel actuator structure.

Background

The actuator is widely applied to a transmission, and most of the actuators use a motor as a power source for driving a mechanism to act under the current trend of electric drive, and are generally applied to gear shifting, parking and the like, and have positive and negative directions. In order to maximally realize low cost and miniaturization of products, a small motor is adopted for driving at present, and a large-speed-ratio transmission mechanism is matched for torque increase so as to meet requirements, and the transmission mechanism adopts a worm and gear mechanism and the like.

The application of the worm and gear mechanism causes the actuator to have a larger axial force in addition to a radial force during the movement torque transmission process. Generally, for this situation, a conical bearing is selected, axial press fitting is required, but a housing of the actuator is generally made of plastic material, which increases difficulty in selecting the bearing, so that a common solution is to use a deep groove ball bearing+thrust bearing solution to bear axial and radial forces. This solution results in a complex actuator structure, with the drawbacks of high costs and complex assembly.

For example, patent document CN211039640U discloses a two-gear transmission gear-shifting executing mechanism and a transmission, wherein the executing mechanism comprises a gear-shifting motor, the gear-shifting motor is provided with a motor shaft, and the output end of the motor shaft is a worm shaft; the executing mechanism also comprises a sector worm wheel, and the sector worm wheel is meshed with the worm shaft to form a worm and gear structure; the non-sector end of the sector worm wheel is provided with a shifting head for pushing a gear shifting block of the transmission, and the swinging direction of the shifting head is consistent with the rotating direction of the sector worm wheel; the sector worm wheel is supported and fixed in the actuating mechanism through a supporting shaft. The technical solution disclosed in this patent document also fails to solve the above-described technical problems.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides a novel actuator structure, and aims to reduce the installation difficulty.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the novel actuator structure comprises a shell, a motor and a worm gear mechanism, wherein the worm gear mechanism comprises a worm gear and a worm, a shaft sleeve and a ball bearing are arranged on the shell, the shaft sleeve and the ball bearing are respectively arranged at two ends of the worm, and the shaft sleeve and the ball bearing are arranged to bear axial force from the worm.

The shaft sleeve is in clearance fit with the worm.

The shaft sleeve is provided with a shaft shoulder, and the shell is internally provided with a groove for embedding the shaft shoulder.

The shell is internally provided with a mounting hole for embedding the shaft sleeve, and the shaft sleeve is in clearance fit with the mounting hole.

The outer surface of the shaft sleeve comprises a first surface and a second surface, the first surface is a plane, the second surface is an arc surface, the first surface and the second surface are provided with a plurality of first surfaces, each first surface is located between two adjacent second surfaces, and each second surface is located between two adjacent first surfaces.

The second surface and the shaft shoulder are coaxially arranged, and the diameter of the second surface is the same as the outer diameter of the shaft shoulder.

Four of the first surface and the second surface are provided.

The motor is connected with a gear transmission mechanism, and the gear transmission mechanism is connected with the worm.

According to the actuator structure, the ball bearing is matched with the shaft sleeve to support the worm, so that the design of low cost and miniaturization of a product is realized, and the installation difficulty can be reduced.

Drawings

The present specification includes the following drawings, the contents of which are respectively:

FIG. 1 is a schematic view of the structure of an actuator of the present utility model;

FIG. 2 is a schematic structural view of a bushing;

FIG. 3 is a schematic view of the assembly of the sleeve with the housing;

Marked in the figure as: 1. a motor; 2. a drive gear; 3. a driven gear; 4. a worm; 5. a ball bearing; 6. a shaft sleeve; 7. a worm wheel; 8. a housing; 9. a first surface; 10. a second surface; 11. and (5) a shaft shoulder.

Detailed Description

The following detailed description of the embodiments of the utility model, given by way of example only, is presented in the accompanying drawings to aid in a more complete, accurate and thorough understanding of the concepts and aspects of the utility model, and to aid in its practice, by those skilled in the art.

It should be noted that, in the following embodiments, the "first" and "second" do not represent an absolute distinction between structures and/or functions, and do not represent a sequential order of execution, but are merely for convenience of description.

As shown in fig. 1 to 3, the utility model provides a novel actuator structure, which comprises a shell 8, a motor 1 and a worm gear mechanism, wherein the motor 1 and the worm gear mechanism are arranged in the shell 8, the worm gear mechanism comprises a worm wheel 7 and a worm 4 which are meshed, a shaft sleeve 6 and a ball bearing 5 are arranged in the shell 8, the shaft sleeve 6 and the ball bearing 5 are respectively arranged at two ends of the worm 4, and the shaft sleeve 6 and the ball bearing 5 are arranged to bear axial force from the worm 4.

Specifically, during a typical gear shift, the forces required during both the upshift and downshift are different (as are the forces required during the P-shift, in-P and out-P, if applied to the P-shift mechanism. With this feature, in the present utility model, only one ball bearing 5+ bushing 6 is used on the support of the worm 4.

When the above scheme is used, it is necessary to ensure that the axial force carried by the sleeve 6 carries a large axial force. For example, in fig. 1, the sleeve 6 is arranged on the right side of the worm 4, and it is necessary to ensure that when the worm wheel 7 rotates clockwise (when the sleeve 6 is subjected to axial force), the output torque required by the mechanism is large; while upon counter-clockwise rotation (when the axial force is received by the ball bearing 5) the output torque required by the mechanism is relatively small.

In the design of the shaft sleeve 6, small clearance fit is adopted for the fit with the shaft hole, a certain centering effect can be achieved, and meanwhile, a shaft shoulder 11 is required to be designed to be matched with a groove of the shell 8 to bear axial force.

As shown in fig. 1 to 3, the shaft sleeve 6 provides support for the worm 4 at one end of the worm 4, the ball bearing 5 provides support for the worm 4 at the other end of the worm 4, the shaft sleeve 6 is in clearance fit with the worm 4, and a central hole for inserting the worm 4 is formed in the center of the shaft sleeve 6.

As shown in fig. 1 to 3, a shoulder 11 is provided on the sleeve 6, and a groove into which the shoulder 11 is fitted is provided in the housing 8. The shaft shoulder 11 is fixedly arranged at one end of the shaft sleeve 6, the shaft shoulder 11 is of a circular structure, and the groove is a circular groove.

As shown in fig. 1 to 3, a mounting hole into which the sleeve 6 is inserted is provided in the housing 8, and the sleeve 6 is in clearance fit with the mounting hole. The outer surface of the sleeve 6 comprises a first surface 9 and a second surface 10, the first surface 9 is a plane, the second surface 10 is an arc surface, the first surface 9 and the second surface 10 are arranged in plurality, each first surface 9 is respectively located between two circumferentially adjacent second surfaces 10, each second surface 10 is also respectively located between two circumferentially adjacent first surfaces 9, and two ends of each first surface 9 are respectively connected with ends of the circumferentially adjacent two second surfaces 10. The first surface 9 is located in a plane parallel to the axis of the sleeve 6, the axis of the second surface 10 is collinear with the axis of the sleeve 6, and the distance between the first surface 9 and the axis of the sleeve 6 is smaller than the diameter of the second surface 10.

As shown in fig. 1 to 3, the second surface 10 and the shoulder 11 are coaxially disposed, and the diameter of the second surface 10 is the same as the outer diameter of the shoulder 11, and one end of the second surface 10 is connected to the outer edge of the shoulder 11.

As shown in fig. 1 to 3, in the present embodiment, four first surfaces 9 and second surfaces 10 are provided.

As shown in fig. 1, a motor 1 is connected with a gear transmission mechanism, the gear transmission mechanism is connected with a worm 4, the gear transmission mechanism transmits power from the motor 1 to the worm 4 to drive the worm 4 to rotate, and the worm 4 drives a worm wheel 7 to rotate.

As shown in fig. 1, the gear transmission mechanism comprises a driving gear 2 and a driven gear 3 which are meshed, the driving gear 2 is connected with the motor 1, the driven gear 3 is fixedly connected with the worm 4 in a coaxial way, and the diameter of the driving gear 2 is smaller than that of the driven gear 3.

The actuator with the structure has the following advantages:

1. In the support mode of the worm 4, the support mode of ball bearings (2) +thrust bearings (2) in the prior art is replaced by the cooperation of the 1 ball bearing 5 and the 1 shaft sleeve 6, so that the low-cost and miniaturized design of the product is realized, and the installation difficulty is further reduced;

2. The shaft sleeve 6 is in small clearance fit with the shaft and the hole, so that the radial centering and bearing functions are realized, and meanwhile, the shaft shoulder 11 is designed on the shaft sleeve 6 and is matched with the groove of the shell 8, so that the axial supporting function is realized.

The utility model also provides a transmission, which comprises the actuator with the structure. The specific structure of the actuator can be referred to in fig. 1 to 3, and will not be described herein. Since the transmission of the present utility model includes the actuator in the above-described embodiment, it has all the advantages of the actuator described above.

The utility model is described above by way of example with reference to the accompanying drawings. It will be clear that the utility model is not limited to the embodiments described above. As long as various insubstantial improvements are made using the method concepts and technical solutions of the present utility model; or the utility model is not improved, and the conception and the technical scheme are directly applied to other occasions and are all within the protection scope of the utility model.

Claims

1. The utility model provides a novel executor structure, includes casing, motor and worm gear mechanism, and worm gear mechanism includes worm wheel and worm, its characterized in that: the shell is provided with a shaft sleeve and a ball bearing, the shaft sleeve and the ball bearing are respectively arranged at two ends of the worm, and the shaft sleeve and the ball bearing are arranged to bear axial force from the worm.

2. The novel actuator structure of claim 1, wherein: the shaft sleeve is in clearance fit with the worm.

3. The novel actuator structure of claim 1, wherein: the shaft sleeve is provided with a shaft shoulder, and the shell is internally provided with a groove for embedding the shaft shoulder.

4. A novel actuator structure according to any one of claims 1 to 3, wherein: the shell is internally provided with a mounting hole for embedding the shaft sleeve, and the shaft sleeve is in clearance fit with the mounting hole.

5. The novel actuator structure of claim 4, wherein: the outer surface of the shaft sleeve comprises a first surface and a second surface, the first surface is a plane, the second surface is an arc surface, the first surface and the second surface are provided with a plurality of first surfaces, each first surface is located between two adjacent second surfaces, and each second surface is located between two adjacent first surfaces.

6. The novel actuator structure of claim 5, wherein: four of the first surface and the second surface are provided.

7. A novel actuator structure according to any one of claims 1 to 3, wherein: the motor is connected with a gear transmission mechanism, and the gear transmission mechanism is connected with the worm.