CN200981153Y - Special press-fitting mechanism for elastic check ring for shaft - Google Patents

Abstract

The utility model provides a special pressure equipment mechanism of circlip for axle, include: the pressing tool body is a cavity of a tower-shaped cavity, one end of the air spring is abutted against the top end of a first cavity of the pressing tool body, the first solid lubrication bearing is abutted against the top end of a second cylindrical cavity of the pressing tool body, the other end of the first solid lubrication bearing is fixedly connected with the side wall of the pressing tool body, the positioning pressure head is arranged in the first solid lubrication bearing, a guide tip of the positioning pressure head is buckled and connected with the end of the assembling shaft, the guide body is connected with the pressing tool body through the second solid lubrication bearing, the compression spring is positioned in a third cylindrical cavity, a guide rib is arranged at the lower part of the guide body, and the guide body; the positioning pressure head enables the pressing tool body and the guide body to be positioned radially relative to the assembling shaft, the elastic retainer ring is accurately pressed and installed in place by the pressing tool body on the guide body, the defects that the positioning performance is poor and the retainer ring is easy to press and deform in a deviating mode in the traditional pressing and installing process are overcome, and the pressing tool has the advantages of being simple in structural form, easy and convenient to operate, high in practicability and the like.

Description

Special press-fitting mechanism for shaft circlips

technical field

The utility model relates to a press-fitting device for an elastic retaining ring, in particular to a special press-fitting mechanism for an elastic retaining ring for some shafts, which is suitable for pressing the elastic retaining ring for some shafts.

Background technique

In the existing press-fitting structure of the shaft circlip, separate press-fitting is a common form, which is usually composed of a presser and a guide sleeve (as shown in Figure 1). The operation process is as follows: first guide Set it on the assembly shaft, then install the shaft retaining ring on the guide sleeve, and finally press down the pressure tool to press the retaining ring in place (as shown in Figure 1-1); in actual work, there are the following deficiencies: the assembly shaft The fixture can swing within a certain range, which is convenient for the hoisting of the assembly shaft, so the coaxiality with the press head is not very good; sometimes the guide sleeve has a large radial float on the assembly shaft during pressing, so that the guide sleeve can be positioned The surface and the shaft shoulder cannot be in correct contact, resulting in deviation, the retaining ring cannot be pressed smoothly, even after being pressed in place, the deformation is large; sometimes the retaining ring is not horizontal on the guide sleeve, and it is very inclined, causing the pressure tool to press on the retaining ring on one side , resulting in the deformation of the retaining ring, which affects the assembly quality; this assembly form also requires high operation of the workers, and it is necessary to avoid the occurrence of the above phenomenon at all times.

Utility model content

The purpose of the utility model is to overcome the shortcomings in the press-fit process of the above-mentioned separate press tool, and provide a special press-fit mechanism for the elastic circlip used in the shaft.

In order to achieve the above purpose, the technical solution adopted by the utility model includes: the press tool body is a structure of a tower-shaped cavity, and a first cavity, a second cavity, and a third cavity are arranged in sequence in it; the gas spring, One end abuts against the top of the first cavity of the press tool body, and the other end passes through the first solid lubricating bearing and is crimped with the positioning pressure head; the first solid lubricating bearing is located at the lower end of the gas spring, and is in contact with the second cavity of the press tool body The top end of the first solid lubricating bearing is abutted against, and the other end of the first solid lubricating bearing is fixedly connected to the bottom end of the second cavity; the positioning pressure head is arranged in the first solid lubricating bearing, and is connected with the first solid lubricating bearing by sliding fit, and the guiding of the positioning pressure head The tip is dynamically fastened with the assembly shaft end during work; the guide body is connected to one end of the third cavity of the press body through the second solid lubricating bearing, and the compression spring is set above the guide body and in the third cavity, and the compression spring One end abuts against the top of the third columnar cavity, and the other end abuts against the second solid sliding bearing; the assembly shaft passes through the guide body from bottom to top, and dynamically cooperates with the gas spring by positioning the top of the pressure head;

The end of the first solid lubricating bearing is provided with an inwardly protruding stop block, the stop block is located below the raised end of the positioning indenter, and the upper edge of the positioning indenter protrudes outward; the press tool body is divided into upper and lower parts The two parts are integrated by fastening screws. There are stroke grooves on both sides of the upper part of the guide body, and the stop pin on the pressing body is slidably connected with the stroke grooves;

There are guide ribs on both sides of the lower part of the guide body, and the guide ribs are cylinders with a width corresponding to the gap of the retaining ring, and the retaining ring is used to enter along the ribs through the gap of the retaining ring, and the retaining ring is installed on the guide body; First contact with the center hole of the assembly shaft and the end surface of the shaft and accurately position it on the assembly shaft. After positioning, the positioning pressure head makes the presser body and the guide body radially positioned relative to the assembly shaft, so that the elastic retaining ring can be pressed on the guide body. The tool body is accurately pressed into place.

Beneficial effects of the utility model:

1. The structure of the utility model adopts an integral combined form. During the pressing process, the positioning pressure head first contacts with the center hole of the assembly shaft and the end surface of the shaft and is accurately positioned on the assembly shaft. After positioning, the positioning pressure head makes the pressure tool body and guide The body is radially positioned relative to the assembly axis, with good coaxiality and good positioning performance.

2. There are guide ribs on both sides of the lower part of the guide body, which are connected with the press tool body through the second solid lubricating bearing. Because of the guide ribs, the retaining ring for the shaft can be pressed on the guide body; the retaining ring is on the guide body. There is no assembly requirement for the position and posture of the body. Once the position and posture of the retaining ring is tilted greatly, the pressure tool body will automatically correct when it is pressed down, avoiding the shortcomings of deviation and unilateral pressing on the retaining ring. The entire press-fitting process is very simple to operate , this form of assembly does not require much workmanship.

Description of drawings

Figure 1 is a schematic diagram of the structure of a separate press.

Figure 1-1 is a schematic diagram of the working state of Figure 1.

Fig. 2 is a structural schematic diagram of the utility model.

Figure 2-1 is a side view of Figure 2.

Fig. 3 is the schematic diagram of the preparatory work of the utility model.

Figure 3-1 is a schematic diagram of the working state of Figure 3.

Detailed ways

Example 1

As shown in Figure 2, the special press-fitting mechanism for the shaft circlip is composed of press tool body 4, gas spring 1, first solid lubricating bearing 2, positioning press head 7, compression spring 5, guide body 10, and assembly shaft. The tool body 4 is a structure of a tower-shaped cavity, and the first cavity, the second cavity, and the third cavity are arranged in sequence in it; one end of the gas spring 1 abuts against the top of the first cavity of the press tool body 4, and the other end Through the first solid lubricating bearing 2 and fixedly connected with the positioning pressure head 7, the gas spring 1 always presses the positioning pressure head 7; the first solid lubricating bearing 2 is located at the lower end of the gas spring 1, and one end of the first solid lubricating bearing 2 is connected The top of the cavity is abutted, and there are screw holes on both sides of the other end. The upper end of the side wall of the press tool body 4 is provided with holes corresponding to the screw holes. The press tool body 4 is divided into upper and lower parts, which are integrated by fastening screws. , the second purpose is to facilitate the processing and assembly of the pressure tool body 4; the positioning pressure head 7 is arranged in the first solid lubricating bearing 2, and the first solid lubricating bearing 2 and the positioning pressure head 7 are connected by a gap sliding fit, and the first solid lubricating bearing 2 The end is provided with an inwardly protruding stop block 8, the stop block 8 is located below the raised end of the positioning indenter 7, and the upper edge of the positioning indenter 7 protrudes outward; The shaft end is dynamically fastened during operation, and the positioning pressure head 7 plays a positioning role; the guide body 10 is connected with the press tool body 4 through the second solid lubricating bearing 9; the compression spring 5 is located in the third cavity of the press tool body 4, and the compression spring One end of 2 is in contact with the top of the third cavity, the other end is in contact with the second solid sliding bearing 9, and the second solid lubricating bearing 9 is in sliding fit with the press tool body 4; Groove, the stroke groove is the upper end sealing structure, the stop pin 8 on the press tool body 4 is slidably connected with the stroke groove, the stop block 8 stops the guide body 10 at the lower limit position; the guide body 4 bottom is provided with guide ribs (such as As shown in Figure 2-1), the guide body 10 is socketed with the assembly shaft, and the guide rib is a cylinder corresponding to the width of the gap of the retaining ring, and the retaining ring is installed on the guide body 10 by using the gap of the retaining ring to enter along the tendon; The positioning indenter 7 is first in contact with the center hole of the assembly shaft and the end surface of the shaft during the press-fitting process, and is accurately positioned on the assembly shaft. After positioning, the positioning indenter 7 makes the radial positioning of the presser body 4 and the guide body 10 relative to the assembly shaft , so that the circlip can be accurately pressed into place by the pressing tool body 4 on the guide body 10 .

Working process: before pressing (as shown in Figure 3), first install the retaining ring on the guide body 10. There is a guide rib on both sides of the lower part of the guide body 10, and the narrow slit above the guide rib is the place where the retaining ring is installed. , use the gap of the retaining ring to enter along the ribs, and the retaining ring is installed on the guide body 10. Due to the effect of the guiding ribs, there is no requirement for the assembly posture of the retaining ring on the guide body 10. Even if the retaining ring has a large tilt, the pressure tool When the body 4 is pressed down, it will be automatically corrected.

At the beginning of press-fitting, the inner diameter of the guide body 10 is relatively large, and it is easy to be sleeved on the assembly shaft. The lower end of the positioning pressure head 7 is provided with a guide top, and the guide top of the positioning pressure head 7 is engaged with the end of the assembly shaft. The coaxiality between the shaft and the presser body 4 is not high. When the positioning presser 7 is in contact with the shaft end of the assembly shaft, the positioning presser 7 does not move, and the presser body 4 and the guide body 10 are aligned with the diameter of the assembly shaft. Continue to press and install, and the positioning pressure head 7 moves up in the pressure tool body 4, and the more it moves up, the greater the pressure of the gas spring 1, and the firmer the positioning.

Continue to press and install, the lower end surface of the guide body 10 will be engaged with the shoulder surface of the assembly shaft, the press tool body 4 will continue to press down, and will be pressed to the retaining ring, while the guide body 10 will move upward relative to the press tool body 4, and the press tool body 4 will The compression spring 5 inside continues to compress, and the gas spring 1 continues to compress until the retaining ring is pressed into place by the press tool body 4 (as shown in Figure 3-1); Under the action, the original initial position is restored, the positioning pressure head 7 slides downward in the first solid lubricating bearing 2 under the action of the gas spring 1, and the guide body 10 slides downward under the action of the compression spring 5, and the pressing is completed.

Claims (6)

1. A special press-fitting mechanism for a shaft circlip, characterized in that it includes: - The press tool body, the press tool body is a structure of a tower-shaped cavity, and a first cavity, a second cavity, and a third cavity are sequentially arranged in it; -A gas spring, one end of the gas spring abuts against the top of the first cavity of the press tool body, and the other end passes through the first solid lubricating bearing and is crimped with the positioning pressure head; - the first solid lubricating bearing, the first solid lubricating bearing is located at the lower end of the gas spring, abuts against the top end of the second cavity of the press tool body, and the other end of the first solid lubricating bearing is fixedly connected to the bottom end of the second cavity; - The positioning pressure head, the positioning pressure head is set in the first solid lubricating bearing, and is connected with the first solid lubricating bearing by sliding fit, and the guiding tip of the positioning pressure head is dynamically buckled with the shaft end of the assembly shaft during operation; - The guide body, the guide body is fixedly connected with the second solid lubricating bearing, and is connected with one end of the third cavity of the press tool body through the second solid lubricating bearing, and the compression spring is arranged above the guide body and in the third cavity; -Assembly shaft, the assembly shaft passes through the guide body from bottom to top, and dynamically cooperates with the gas spring through the top of the positioning pressure head. 2. The press-fitting mechanism for shaft circlips according to claim 1, characterized in that: guide ribs are provided on both sides of the lower part of the guide body, and the guide ribs are cylinders with a width corresponding to the opening of the circlip. 3. The press-fitting mechanism for shaft circlips according to claim 1, wherein the compression spring is placed in the third cavity, one end of the compression spring is in contact with the top of the third cavity, and the other end is in contact with the top of the third cavity. Two solid plain bearings abut. 4. The special press-fitting mechanism for shaft circlips according to claim 1, characterized in that: the end of the first solid lubricating bearing is provided with an inwardly protruding stop block, and the stop block is located on the protrusion of the positioning pressure head. Below the starting end, the upper edge of the positioning pressure head protrudes outward. 5. The special press-fitting mechanism for shaft circlips according to claim 1, characterized in that: the main body of the press tool is divided into upper and lower parts, which are combined into one body by fastening screws. 6. The press-fitting mechanism for shaft circlips according to claim 1, characterized in that: there are stroke grooves on both sides of the upper part of the guide body, and the stop pin on the presser body slides and fits with the stroke grooves.

Images