Steering gear worm wheel and output shaft press-fitting synthesis device

Abstract

The utility model discloses a press-fitting synthesis device for a worm gear and an output shaft of a steering gear, which comprises a device bottom plate mounted on a working table of equipment, and the device bottom plate is fixedly connected with a press-fitting synthesis device body through a fastener; the press-fitting synthesis device body comprises a base and a press-fitting device vertically installed above the base, the press-fitting device is composed of an upper part and a lower part, and the upper part and the lower part are fixedly connected into a whole through a first penetrating bolt; the pressing device is of a hollow structure, an inner cavity used for containing the worm gear and the output shaft to be installed is formed, a spring is further installed in the inner cavity of the lower portion of the pressing device, and the positioning sleeve moves up and down in the positioning block through the spring. According to the utility model, rapid and accurate positioning can be realized, and the press-fitting quality problem caused by non-coaxial upper and lower parts of equipment is effectively avoided.

Description

Technical Field

[0001] The utility model relates to a press-fit synthesis device, in particular to a device used for press-fit synthesis of a steering gear worm wheel and an output shaft, belonging to the technical field of automobile parts processing. Background Art

[0002] In the existing technology, the worm gear shaft assembly, as the core component of the EPS steering gear, plays a key role in meshing and rotating with the worm. Failure to press-fit the worm gear and the output shaft will cause abnormal fluctuations in no-load performance, and may even cause jamming and steering failure. Utility Model Content

[0003] The purpose of the utility model is to address the problems existing in the above-mentioned prior art and to provide a device for press-fitting a steering gear worm gear and an output shaft, which has a reasonable structure and is easy to use. Through this press-fitting synthesis device, fast and accurate positioning can be achieved, and press-fitting quality problems caused by different upper and lower axes of the equipment can be effectively avoided.

[0004] In order to achieve the above purpose, the specific technical scheme of the utility model is as follows: a steering gear worm gear and output shaft press-fit synthesis device, characterized in that: it includes a device base plate installed on the work surface of the equipment, and the device base plate is fixedly connected to the press-fit synthesis device body by fasteners; the press-fit synthesis device body includes a base and a pressing device vertically installed above the base, the pressing device consists of an upper and a lower part, and the two are fixedly connected as one by a first bolt passing through; the pressing device is a hollow structure, forming an inner cavity for placing the worm gear and output shaft to be installed, and the lower inner cavity of the pressing device is also installed with a spring, and the positioning sleeve is moved up and down in the positioning block by the spring.

[0005] Furthermore, the device base is rectangular, with a mounting position in the center for fixing and pressing the synthesis device body; bolt holes are opened along the diagonal lines of the device base, and the device base is fixed to the equipment work surface by bolts that pass through the holes and cannot be removed.

[0006] Furthermore, the four corners of the bottom plate of the device have chamfers to prevent collisions and injuries to operators.

[0007] Furthermore, the lower portion of the pressing device is a hollow column, the inner wall of the column is stepped, and the diameter of the inner wall decreases from top to bottom.

[0008] Furthermore, the bottom lower plane of the column and the upper plane of the base are connected and fixed by a second screw.

[0009] Furthermore, the upper part of the pressing device is composed of a positioning block and a positioning sleeve installed inside the positioning block. The outer circle of the positioning sleeve is matched with a small gap between the inner wall of the positioning block, so that the positioning sleeve can slide smoothly up and down in the positioning block, and the lower part of the positioning sleeve extends to the inside of the column, and the step of the positioning sleeve plays an axial limiting role.

[0010] Furthermore, the upper end of the spring contacts the bottom of the output shaft, and the bottom contacts the step of the column.

[0011] Compared with the existing technology, the outstanding progress of the present invention is: the solution of the present invention is mature and reliable, has strong feasibility, and can achieve fast and accurate positioning. Through this press-fitting synthesis device, fast and accurate positioning can be achieved, effectively avoiding press-fitting quality problems caused by different upper and lower axes of the equipment.

[0012] The utility model has a reasonable layout and low production cost, is suitable for mass production, and can meet the market demand for carrying out this work. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below with reference to the accompanying drawings.

[0014] Figure 1 This is a cross-sectional view of the utility model before press-fitting.

[0015] Figure 2 This is a cross-sectional view of the utility model after press-fitting.

[0016] Figure 3 It is a structural diagram of the present utility model.

[0017] Description of the drawings: 1-base, 2-second bolt, 3-column, 4-spring, 5-worm gear, 6-output shaft, 7-first bolt, 8-positioning block, 9-positioning sleeve, 10-installation bottom plate, 11-non-slip bolt. DETAILED DESCRIPTION

[0018] This embodiment provides a device for press-fitting a steering gear worm gear and an output shaft. The structure is shown in the figure and includes main components such as a base 1, a column 3, a spring 4, a positioning block 8, and a positioning sleeve 9.

[0019] The positioning block 8, the positioning sleeve 9, the column 3 and the spring 4 are installed and fixed together to form a pressing device.

[0020] The base is annular and has four mounting holes symmetrically provided along its circumference. The pressing device is fixed vertically on top of the base by a second bolt 2 passing through the base.

[0021] The pressing device consists of an upper part and a lower part, which are fixedly connected as a whole by a first bolt 7 passing through.

[0022] The column 3 is the lower part of the pressing device. It is a hollow structure with a stepped inner wall. At the same time, the diameter of the inner wall decreases from top to bottom. The lower plane of the bottom of the column and the upper plane of the base are connected and fixed by a second bolt 2.

[0023] The upper part of the press-fit device consists of a positioning block 8 and a positioning sleeve 9 installed inside the positioning block. The outer circle of the positioning sleeve fits into the inner wall of the positioning block with a small gap, which allows the positioning sleeve to slide up and down smoothly in the positioning block. The lower part of the positioning sleeve extends into the interior of the column, and the step of the positioning sleeve can serve as an axial limit.

[0024] The upper end of the spring 4 contacts the bottom of the output shaft, and the bottom contacts the step of the column. The spring drives the positioning sleeve to move up and down in the positioning block.

[0025] like Figure 3 As shown, a base plate 10 is mounted beneath the base. This base plate serves as the foundation for the entire device, to which the remaining components are fixedly connected. The base plate is rectangular, with a central mounting location for the base. Diagonally along the base plate are bolt holes, through which captive bolts 11 penetrate to secure the base plate to the work surface.

[0026] The working process of this embodiment is as follows: First, place the worm gear on the outer circle of the positioning sleeve, and then place the output shaft in the positioning sleeve. Figure 1 shown.

[0027] During press-fitting, the upper pressure head of the press drives the output shaft to move downward, while the spring contracts and the positioning sleeve also moves downward. Figure 2 shown.

[0028] This press-fit synthesis device can achieve fast and accurate positioning, effectively avoiding press-fit quality problems caused by different upper and lower axes of the equipment.

[0029] In addition to the above implementations, the present invention may also have other implementations. Any technical solution that adopts equivalent replacement or equivalent transformation forms falls within the scope of protection required by the present invention.

Claims

1. A device for press-fitting a steering gear worm gear and an output shaft, characterized in that: It includes a device base plate installed on the work surface of the equipment, and the device base plate is fixedly connected to the press-fit synthesis device body by fasteners; the press-fit synthesis device body includes a base and a pressing device installed vertically above the base, and the pressing device consists of an upper and a lower part, which are fixedly connected as a whole by a first bolt passing through; the pressing device is a hollow structure, forming an inner cavity for placing the worm gear and output shaft to be installed, and the lower inner cavity of the pressing device is also installed with a spring, which enables the positioning sleeve to move up and down in the positioning block.

2. The device for press-fitting a worm gear and an output shaft of a steering gear according to claim 1, characterized in that: The device bottom plate is rectangular, with a mounting position in the center for fixing and pressing the synthesis device body; bolt holes are opened along the diagonal lines of the device bottom plate, and the device bottom plate is fixed to the equipment work surface by bolts that penetrate through the holes and cannot be removed.

3. The device for press-fitting a worm gear and an output shaft of a steering gear according to claim 2, characterized in that: The four corners of the bottom plate of the device are provided with chamfers to prevent collision and injury to operators.

4. The device for press-fitting a worm gear and an output shaft of a steering gear according to claim 1, characterized in that: The lower part of the pressing device is a hollow column, the inner wall of the column is stepped, and the diameter of the inner wall decreases from top to bottom.

5. The device for press-fitting a worm gear and an output shaft of a steering gear according to claim 4, characterized in that: The lower plane of the bottom of the column and the upper plane of the base are connected and fixed by a second screw.

6. The device for press-fitting a worm gear and an output shaft of a steering gear according to claim 4, characterized in that: The upper part of the pressing device consists of a positioning block and a positioning sleeve installed inside the positioning block. The outer circle of the positioning sleeve is matched with a small gap between the inner wall of the positioning block, so that the positioning sleeve can slide smoothly up and down in the positioning block, and the lower part of the positioning sleeve extends to the inside of the column, and the step of the positioning sleeve plays an axial limiting role.

7. The device for press-fitting a worm gear and an output shaft of a steering gear according to claim 4, characterized in that: The upper end of the spring contacts the bottom of the output shaft, and the bottom contacts the step of the column.

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