CN212480320U

CN212480320U - Self-adaptive integral stroke output shaft structure

Info

Publication number: CN212480320U
Application number: CN202020692504.5U
Authority: CN
Inventors: 苗振海; 王学雷; 魏萌; 卢香丽; 金梦
Original assignee: Tianjin Baili Ertong Machinery Co ltd
Current assignee: Tianjin Baili Ertong Machinery Co ltd
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2021-02-05
Anticipated expiration: 2030-04-29

Abstract

The utility model discloses a self-adaptive integral stroke output shaft structure, which is characterized by comprising a stroke shaft gear A, a stroke shaft sleeve A, a check ring A for a shaft, a compression spring and a rolling bearing; the advantages are as follows: the transmission mechanism has the advantages of reducing the production cost, being sensitive and reliable in transmission, being convenient for complete set installation and disassembly, and solving the technical problems existing in the prior art.

Description

Self-adaptive integral stroke output shaft structure

Technical Field

The utility model relates to a valve electric actuator technical field, especially an integral stroke output shaft structure of self-adaptation.

Background

At present, the stroke control mechanism of the valve electric device has the functions of realizing the control of the opening and closing position of the electric valve and signal feedback thereof, and is one of the main control components of the electric device. The stroke control mechanism of the multi-turn electric device comprises two parts, namely an electric control execution part and a stroke control motion output part, namely a stroke output transmission mechanism which transmits the main transmission motion of the electric device driving valve rod to the stroke between the electric control execution parts. When the electric device is powered on and operates, the main transmission structure in the electric device drives the output shaft to rotate to complete the action of controlling the opening and closing of the valve. The control of the stroke motion of the electric device is led out by a stroke output transmission mechanism connected with an output shaft, and the valve position information in the motion process is transmitted to an electric control element, so that the electric element acts to control the starting and stopping of the motor, and the control of the opening and closing of the electric valve in place is realized.

The installation and structure of the stroke output shaft structure in the prior art are shown in fig. 1, a stroke shaft B12 is installed in a stroke shaft sleeve B13 through shaft hole matching and end face matching, a stroke shaft gear B11 is installed on a stroke shaft B12 through shaft hole matching, and the stroke shaft gear B11 is axially positioned and fixed on a stroke shaft B12 through an elastic pin 15. An annular groove is arranged on the stroke shaft sleeve B13, and an O-shaped sealing ring is arranged in the annular groove. The assembled stroke shaft gear B11, stroke shaft B12 and stroke shaft sleeve B13 are assembled into a stroke hole on the box body 1 through shaft hole matching and end face matching, then an axial baffle plate 14 is assembled, and a hole retaining ring 16 is installed in a positioning groove arranged on the box body, so that the axial fixing of the stroke shaft sleeve B13 is realized. The stroke encoder 2 is installed on the box body 1 through screws, and the stroke shaft B12 is connected with an inner hole of the stroke encoder 2 through flat shaft type matching. When the valve needs to be opened or closed, the electric device acts, the output shaft rotates along with the output shaft, the stroke shaft gear B11 is driven to rotate, the stroke shaft gear B11 drives the stroke shaft B12 to rotate through the elastic pin 15 connected with the stroke shaft gear B11, the flat shaft end on the right side of the stroke shaft B12 is connected with the stroke encoder 2, and therefore the inner shaft of the stroke encoder 2 is driven to rotate, and transmission and triggering of motion signals are achieved.

This structure has the following disadvantages:

(1) the requirement on machining precision is high, the production efficiency is low, and faults are easily caused: because the stroke output structure realizes axial positioning by the retainer ring for the hole arranged on the box body, and the stroke shaft gear transmission type is bevel gear transmission, the requirement on the axial positioning of the retainer ring positioning groove on the box body is tighter, and the meshing transmission stability and reliability of the bevel gear cannot be accurately ensured. The problem of unreliable transmission caused by poor axial positioning of the stroke shaft gear is easy to occur, and further, the fault phenomenon of stroke control of the electric device is caused.

(2) The production cost is higher, and the product easily produces the frictional heating in the operation, and transmission sensitivity is relatively poor: the stroke axle needs to be installed through the shaft hole cooperation with the stroke axle sleeve in this structure, and the stroke axle requires that the rigidity is better and be high-speed rotary motion, therefore the stroke axle sleeve must select wear-resisting material and hole smooth finish requirement for use higher to the phenomenon is ground in the shaft hole appearing in avoiding moving, leads to the motion inefficacy and then makes the unable rotation of stroke axle.

(3) The assembly manufacturability is poor, the assembly is complete, and the assembly and disassembly are inconvenient: the assembled parts of the structure need to be assembled and installed on the box body, and the drill assembling process exists, so that the assembling quality and the manufacturability are poor; and when the parts are damaged and need to be replaced, the parts are not convenient to take out of the box body for disassembly.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an integral stroke output shaft structure of self-adaptation has reduced manufacturing cost, and the transmission is sensitive reliable, and the complete set installation of being convenient for is dismantled, has solved the technical problem who exists among the well-known art.

The technical scheme of the utility model: the self-adaptive integral stroke output shaft structure is characterized by comprising a stroke shaft gear A, a stroke shaft sleeve A, a check ring A for a shaft, a compression spring and a rolling bearing; the stroke shaft gear A is assembled on the inner side of the stroke shaft A; the compression spring is assembled between a stroke shaft gear A and a shaft shoulder at the inner end of the stroke shaft A, the rolling bearing is assembled on the outer side of the stroke shaft sleeve A, the stroke shaft A is located in an inner hole of the stroke shaft sleeve A, and the stroke shaft A is fixed with the rolling bearings at the inner end of the stroke shaft sleeve A and the outer end of the stroke shaft sleeve A through a check ring A for a shaft.

The stroke shaft sleeve A is arranged on the box body and is fastened through a sunk screw.

The stroke shaft sleeve A is fixedly connected with the encoder through an inner hexagon screw.

The stroke shaft gear A is connected with the stroke shaft A through flat shaft type matching.

The stroke shaft gear A is axially limited by a shaft retainer ring B.

The outer end of the stroke shaft A is connected with the inner hole of the encoder through a flat shaft.

The utility model has the advantages and positive effect:

(1) the utility model reduces the processing precision requirement of the box body on the center distance of the stroke shaft gear A3, when the precision of the meshing center distance of the stroke shaft gear A3 is poor, the axial self-adaptive movement can be realized through the compression spring, thereby the self-adaptive meshing center distance is realized, and the reliability of gear transmission is ensured;

(2) the utility model improves the assembly manufacturability, the stroke output structure can be assembled in a set and then installed to the box body, the axial positioning is reliable, the installation and the disassembly are convenient, and the production efficiency is improved;

(3) the utility model discloses change with the casting stroke axle sleeve of formable, reduced part manufacturing cost. And the rolling bearing is arranged between the stroke shaft and the stroke shaft sleeve, so that friction heating can be avoided when the stroke shaft rotates at a high speed, the sensitivity of the stroke transmission mechanism is improved, and the possibility of stroke control failure caused by part abrasion is effectively avoided.

Drawings

Fig. 1 is a schematic structural diagram of the prior art.

Fig. 2 is the utility model discloses the structural schematic of the integral stroke output shaft structure of self-adaptation.

The device comprises a box body 1, an encoder 2, a stroke shaft gear A3, a stroke shaft A4, a stroke shaft sleeve A5, a countersunk head screw 6, a shaft retainer A7, a compression spring 8, a rolling bearing 9, a shaft retainer B10, a stroke shaft gear B11, a stroke shaft B12, a stroke shaft sleeve B13, an axial baffle 14, an elastic pin 15 and a hole retainer 16.

Detailed Description

In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to fig. 2.

Example (b): the self-adaptive integral stroke output shaft structure (see fig. 2) is characterized by comprising a stroke shaft gear A3, a stroke shaft A4, a stroke shaft sleeve A5, a shaft retainer ring A7, a compression spring 8 and a rolling bearing 9; the stroke shaft gear A3 is fitted inside the stroke shaft a 4; the compression spring 8 is assembled between a stroke shaft gear A3 and a shaft shoulder at the inner end of a stroke shaft A4, the rolling bearing 9 is assembled at the outer side of a stroke shaft sleeve A5, the stroke shaft A4 is positioned in an inner hole of the stroke shaft sleeve A5, and the stroke shaft A4 is respectively fixed with the rolling bearings 9 at the inner end of the stroke shaft sleeve A5 and the outer end of the stroke shaft sleeve A5 through shaft retaining rings A7.

The stroke sleeve A5 is arranged on the box body 1 and is fastened by a countersunk head screw 6.

The stroke shaft sleeve A5 is fixedly connected with the encoder 2 through a socket head cap screw.

The stroke shaft gear A3 is connected with the stroke shaft A4 through flat shaft type matching.

The stroke shaft gear a3 is axially limited by a shaft retainer B10.

The outer end of the stroke shaft A4 is connected with the inner hole of the encoder 2 through a flat shaft.

Claims

1. The self-adaptive integral stroke output shaft structure is characterized by comprising a stroke shaft gear A, a stroke shaft sleeve A, a check ring A for a shaft, a compression spring and a rolling bearing; the stroke shaft gear A is assembled on the inner side of the stroke shaft A; the compression spring is assembled between a stroke shaft gear A and a shaft shoulder at the inner end of the stroke shaft A, the rolling bearing is assembled on the outer side of the stroke shaft sleeve A, the stroke shaft A is located in an inner hole of the stroke shaft sleeve A, and the stroke shaft A is fixed with the rolling bearings at the inner end of the stroke shaft sleeve A and the outer end of the stroke shaft sleeve A through a check ring A for a shaft.

2. The adaptive integrated stroke output shaft structure according to claim 1, wherein the stroke sleeve A is mounted on the box body and fastened by countersunk head screws.

3. The adaptive integrated stroke output shaft structure according to claim 1, wherein the stroke sleeve A is fixedly connected with the encoder through a socket head cap screw.

4. The adaptive integrated stroke output shaft structure according to claim 1, wherein the stroke shaft gear a is connected with the stroke shaft a by a flat shaft type fitting.

5. The adaptive integral stroke output shaft structure according to claim 1, wherein the stroke shaft gear a is axially limited by a shaft retainer ring B.

6. The adaptive integral stroke output shaft structure according to claim 1, wherein the outer end of the stroke shaft A is connected with the inner hole of the encoder through a flat shaft.