CN210510003U

CN210510003U - But butt joint axle construction of quick replacement butt joint cover

Info

Publication number: CN210510003U
Application number: CN201920587207.1U
Authority: CN
Inventors: 沈建强; 邱阳; 张世军
Original assignee: Shanghai H Reilhofer Automation Test Technology Co ltd; Shanghai W Ibeda High Tech Group Co ltd
Current assignee: Shanghai H Reilhofer Automation Test Technology Co ltd; Shanghai W Ibeda High Tech Group Co ltd
Priority date: 2019-04-26
Filing date: 2019-04-26
Publication date: 2020-05-12
Anticipated expiration: 2029-04-26

Abstract

The utility model discloses a butt joint shaft structure capable of rapidly replacing a butt joint sleeve, which comprises a shaft body and a sleeve body, wherein the sleeve body is arranged on the shaft body, is limited in the circumferential direction and can relatively move along the shaft body in the axial direction; the shaft body is a hollow shaft body and comprises a first end and a second end, the first end of the shaft body is a fixed end, and the peripheral wall of the shaft body, which is close to the second end, is provided with more than one through hole for accommodating a radial locking component which can extend out or retract along the radial direction after being extruded or abutted against the rear head part; the hollow shaft body is internally provided with a moving pin which can be displaced along the axial direction, the moving pin or a connecting piece thereof is contacted with the radial locking components and at least has a contact surface which presses the corresponding radial locking component outwards along the radial direction in the stroke of keeping the moving pin displaced along the axial direction, and the hollow shaft body is provided with a containing space which is used for partially or wholly containing or avoiding the radial locking component retracted along the radial direction.

Description

But butt joint axle construction of quick replacement butt joint cover

Technical Field

The utility model relates to a power or transmission part's automatic test rack field of getting off the production line, concretely relates to but a quick replacement butt joint axle construction to adapter sleeve for butt joint.

Background

In the field of offline automatic test benches for various power or transmission parts, a structure which needs to transmit torque and rotating speed and is automatically butted is often used, the condition is that an involute spline pair is generally adopted, a production line can change a model at intervals, and parts butted with the test benches need to be replaced.

In a production line of a hydration operation, an excessively long pause of one station may cause overstock of a front station or waiting of a subsequent station, which affects the yield of the whole line, so that the use of tools and operation steps should be reduced as much as possible when the model changing work is performed, thereby saving time.

As shown in fig. 1 and 2, which are structural illustrations of a related abutment mechanism in the prior art, an involute spline housing 23 is used for external abutment, which moves axially with a rectangular spline shaft 21. Buffering when realizing the butt joint through the vice back-and-forth movement of rectangle spline, wear-resisting uide bushing 22 can form the cooperation with the uide pin of piece under test before the vice contact of involute spline, plays the centering effect, improves the butt joint success rate of involute spline, and buffer spring 26 provides the cushion effect, and end cover 25 realizes axial positioning, and the screw of all circumference equipartitions is fastened.

The structure has simple processing and assembling process, higher reliability in use and can realize automatic butt joint with higher precision and torque transmission. Therefore, it is widely used in test benches.

However, the disadvantage of this structure is obvious, the rectangular spline housing 24 is locked by the hexagon socket head cap screw, there are generally 6 to 8 uniformly distributed screws according to the rated torque, and the high-strength screw of 12.9 grade is commonly used, and the screw needs to be tightened by a torque wrench according to the specified pretightening force during installation. Therefore, the difficulty is caused to the change of the butting sleeve when the tested product is subjected to model change, and the time wasted during model change finally influences the production rate of a production line and causes loss.

In addition, the precision of the test bench is high, the equipment is complex, particularly, the butt joint part has more parts, the operation space is narrow, and the use of a torque wrench is limited. And a hidden danger is also generated, the small hand-held screw is likely to fall into other parts below in the process of screwing and loosening in the rack, and the precise parts are difficult to take out or damaged, so that more time waste and loss are caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a conveniently tear open and trade is provided, but the quick replacement butt joint axle construction to the adapter sleeve of the remodeling can be accelerated greatly.

The technical problem to be solved can be implemented by the following technical scheme.

A butt joint shaft structure capable of quickly replacing a butt joint sleeve comprises a shaft body and a sleeve body, wherein the sleeve body is sleeved on the shaft body, is limited in the circumferential direction and can relatively move along the shaft body in the axial direction; the shaft body is a hollow shaft body and comprises a first end and a second end, the first end of the shaft body is a fixed end, and the peripheral wall of the shaft body, which is close to the second end, is provided with more than one through hole for accommodating a radial locking component which can extend out or retract along the radial direction after being extruded or abutted against the rear head part; the hollow shaft body is internally provided with a moving pin which can be displaced along the axial direction, the moving pin or a connecting piece thereof is contacted with the radial locking components and at least has a contact surface which presses the corresponding radial locking component outwards along the radial direction in the stroke of keeping the moving pin displaced along the axial direction, and the hollow shaft body is provided with a containing space which is used for partially or wholly containing or avoiding the radial locking component retracted along the radial direction.

As one of the preferred embodiments of the present invention, the radial locking component is a cylindrical pin or a steel ball with a spherical end, and the spherical end is located at one end of the radial locking component away from the center of the circle.

As a further improvement of the technical scheme, the hollow cavity of the hollow shaft body is of a step type hollow structure, and the main body of the hollow shaft body comprises three sections of hollow cavities with narrower middle parts and wider middle parts at two ends; the moving pin is a two-section stepped pin, the outer diameters of two sections of the moving pin are respectively matched with the inner diameters of a section of hollow cavity of the hollow cavity close to the fixed end of the shaft body and a section of hollow cavity of the middle section, one side of the moving pin close to the fixed end of the shaft body is taken as a head part, the tail part of the moving pin is detachably connected with one head part, and the outer diameter of the head part is matched with the inner diameter of a section of hollow cavity of the hollow shaft body close to the second end; the through hole is formed in the inner wall of a section of hollow cavity, close to the second end, of the hollow shaft body; the accommodating space is a spherical groove formed on the surface of the end head.

As a further improvement of this solution, one of the ends of the moving pin abuts a first spring in the axial direction.

As a further improvement of the technical scheme, one end of the sleeve body is abutted against a second spring, one of the first spring and the second spring is a compression spring, and the other spring is an extension spring.

As a further improvement of the technical scheme, the first spring is arranged in a hollow cavity close to the first end of the shaft body.

As a further improvement of this aspect, the structure further includes an anti-slip structure for preventing the radial lock member from completely leaving the through hole in the radial direction.

Wherein the anti-slip structure may be a sleeve sleeved on the second end of the shaft body.

As a further improvement of the technical solution, an avoiding space is provided on the inner side of the sleeve body to avoid the radial locking member extending in the radial direction.

As another preferred embodiment of the present invention, four sets of the through holes and the radial locking members are radially provided; the shaft body is a rectangular spline shaft, and the sleeve body is a rectangular spline sleeve.

By adopting the technical scheme, the butt joint shaft structure capable of rapidly replacing the butt joint sleeve realizes quick disassembly and quick assembly of the butt joint sleeve under the condition of not reducing the precision, is simple to operate, can be disassembled and assembled without any tool or even with one hand, and greatly accelerates the time for changing the model. By adopting the hollow shaft structure, the quick-change structure is hidden inside, the weight is reduced, the space is not occupied, the structure is compact, and the part processing is simple.

Compared with the prior art shown in fig. 1 and 2, in one of the preferred embodiments of the present invention, the main parts still adopt three parts, namely, the involute spline housing, the rectangular spline housing and the shaft, and the proportion of the total cost occupied by the cost of the other small parts is very small, so that the structure hardly needs to increase the cost.

Drawings

FIG. 1 is a prior art butt-joint sleeve structure;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

fig. 3 is a schematic structural view of a docking shaft structure of the quick-replaceable docking sleeve according to the present invention from a viewing angle of a docking side;

FIG. 4 is a sectional view A-A of FIG. 3;

FIG. 5 is a state diagram of the variation of FIG. 4;

in the figure: 1. the steel ball bearing comprises steel balls, 2, a steel ball groove block, 3, an involute spline housing, 4, a steel ball retaining housing, 5, a rectangular spline housing, 6, a remanufacturing screw, 7, a shaft sleeve, 8, a buffer spring, 9, a locking spring, 10, an end cover, 11, a rectangular spline shaft, 12, a connecting screw, 13, a through hole, 14, a step, 15, a step, 16 and a groove;

21. the bearing comprises a rectangular spline shaft, 22, a wear-resistant guide sleeve, 23, an involute spline sleeve, 24, a rectangular spline sleeve, 25, an end cover, 26 and a buffer spring;

Detailed Description

The following describes in further detail embodiments of the present invention with reference to the accompanying drawings.

As shown in fig. 4 to 5, in the butt joint shaft structure capable of rapidly replacing the butt joint sleeve, the rectangular spline shaft 11 is a hollow shaft, the left side of the rectangular spline shaft is fixed by a screw, an end cover 10 is sequentially arranged in the hollow shaft from left to right, a locking spring 9 is pressed on the end cover 10, the other end of the spring 9 is a screw head of the modified screw 6, and the tail part of the modified screw 6 fixes the steel ball groove block 2 through a connecting screw 12. Four through holes 13 are arranged on the circumferential surface of the right side end of the rectangular spline shaft 11, and steel balls 1 are placed in the through holes 13.

The hollow structure of the rectangular spline shaft 11 is a stepped structure, two

steps

14 and 15 formed by the stepped structure are respectively used for limiting the screw head of the modified screw 6 and the part of the steel ball groove block 2 protruding out of the modified screw 6, and the head of the corresponding modified screw 6, the outer diameter of the screw column part and the outer diameter of the steel ball groove hole 2 are respectively matched with the inner diameter of the hollow inner wall at the corresponding part of the rectangular spline shaft 11 (wherein, the modified screw column part is also provided with a shaft sleeve 7 outside).

Namely, the buffer during butt joint is realized through the forward and backward movement of the rectangular spline pair, the buffer spring 8 sleeved outside the shaft body provides buffer force, the right side of the buffer spring 8 directly abuts against the rectangular spline housing 5, the rectangular spline housing 5 is a sleeve body which is fixed in the circumferential direction and can move along the rectangular spline shaft 11 in the axial direction, the inner diameter of the sleeve body is stepped, the narrower inner diameter is adapted to the outer diameter of the rectangular spline shaft 11, and the wide space is used for avoiding the steel ball 1 which protrudes out of the through hole 13 along the radial direction.

Because the rectangular spline shaft 11 is a hollow structure, the right end of the rectangular spline shaft is provided with 4 through holes (namely, through holes 13 in the drawing) for installing the steel balls 1 along the radial direction, the locking spring 9 pushes out the modified screw 6 and the steel ball groove block 2 towards the right during normal test, the steel balls 1 are limited by the steel ball groove block 2 and the steel ball retaining sleeve 4 (wherein, the middle of the steel ball retaining sleeve 4 is provided with an avoidance space for the steel ball groove hole 2 to move towards the right along the axial direction), the outer side is slightly larger than the small diameter of the rectangular spline sleeve 5, the axial positioning is realized, and all the screws uniformly distributed.

When the type needs to be changed, the involute spline housing 3 and the rectangular spline housing 5 are changed together as an external member, a finger can be inserted into the involute spline housing 3 and presses the steel ball groove block 2, so that the steel ball 1 and the groove (namely the groove 16 in the figure) are in the same plane, under the action of the elastic force of the buffer spring 8, the rectangular spline housing 5 can press the steel ball 1 into the groove 16 of the steel ball groove block 2 and continuously move outwards, when the end face at the right side exceeds the plane of the steel ball, the finger can be completely pulled out, and the external member is held to pull out the external member along an arrow in figure 5.

The parameters of the rectangular spline in the replaced spline external member are kept consistent, the method is similar to disassembly during installation, the rectangular spline is firstly butted and inserted to the bottom until being clamped by the steel ball, at the moment, a finger (such as a screw or a screwdriver and the like is required to be used for pressing the steel ball groove block if the finger can not reach the steel ball groove block), when the left end surface of the external member exceeds the plane where the steel ball is located, the finger is pulled out, the external member is continuously pushed leftwards, and when the sound of the steel ball being pushed out from the groove is heard, the successful installation is indicated.

The part with the groove is arranged on the outer side of the rectangular spline, namely the steel ball moves inwards to realize axial locking and moves outwards to fall into the groove. In addition, the rectangular spline can be other types of splines, a square shaft or other structures capable of positioning and moving axially in the circumferential direction. Similarly, the steel ball can be replaced by a cylindrical pin with spherical ends.

The utility model utilizes the steel balls to carry out axial positioning, and the steel balls are pressed tightly by the elasticity of the spring in the opposite direction; the groove and the boss on the cylindrical surface are used for controlling the steel ball to move along the radial direction; it does not occupy space, and is effectual, and improvement cost is low.

Claims

1. A butt joint shaft structure capable of quickly replacing a butt joint sleeve comprises a shaft body and is characterized by further comprising a sleeve body which is sleeved on the shaft body, is limited in the circumferential direction and can relatively move along the shaft body in the axial direction; the shaft body is a hollow shaft body and comprises a first end and a second end, the first end of the shaft body is a fixed end, and the peripheral wall of the shaft body, which is close to the second end, is provided with more than one through hole for accommodating a radial locking component which can extend out or retract along the radial direction after being extruded or abutted against the rear head part; the hollow shaft body is internally provided with a moving pin which can be displaced along the axial direction, the moving pin or a connecting piece thereof is contacted with the radial locking components and at least has a contact surface which presses the corresponding radial locking component outwards along the radial direction in the stroke of keeping the moving pin displaced along the axial direction, and the hollow shaft body is provided with a containing space which is used for partially or wholly containing or avoiding the radial locking component retracted along the radial direction.

2. A docking shaft structure capable of rapidly replacing a docking sleeve according to claim 1 wherein the radial locking member is a cylindrical pin or steel ball with a spherical end, the spherical end is located at one end of the radial locking member away from the center of the circle.

3. The butt joint shaft structure capable of rapidly replacing the butt joint sleeve according to claim 1, wherein the hollow cavity of the hollow shaft body is of a stepped hollow structure, and the main body of the butt joint shaft structure comprises three sections of hollow cavities with narrow middle parts and wide middle parts at two ends; the moving pin is a two-section stepped pin, the outer diameters of two sections of the moving pin are respectively matched with the inner diameters of a section of hollow cavity of the hollow cavity close to the fixed end of the shaft body and a section of hollow cavity of the middle section, one side of the moving pin close to the fixed end of the shaft body is taken as a head part, the tail part of the moving pin is detachably connected with one head part, and the outer diameter of the head part is matched with the inner diameter of a section of hollow cavity of the hollow shaft body close to the second end; the through hole is formed in the inner wall of a section of hollow cavity, close to the second end, of the hollow shaft body; the accommodating space is a spherical groove formed on the surface of the end head.

4. A docking shaft structure for a quick change docking sleeve as in claim 1 wherein one end of the moving pin abuts a first spring in an axial direction.

5. The docking shaft structure of claim 4 wherein one end of the housing abuts a second spring, one of the first and second springs being a compression spring and the other being an extension spring.

6. A docking shaft structure with a quick-change docking sleeve according to claim 4 or 5 wherein said first spring is disposed within a hollow cavity near a first end of said shaft body.

7. A docking shaft arrangement for a quick change docking sleeve as recited in claim 1, further comprising a break-away prevention structure for preventing said radial lock member from moving completely radially out of said through hole.

8. A docking shaft structure with a quick-change docking sleeve as in claim 7 wherein said anti-slip structure is a collar on the second end of said shaft body.

9. A docking shaft structure capable of rapidly replacing a docking sleeve according to claim 1 or 5, wherein an avoiding space for avoiding a radial locking member protruding in a radial direction is provided on the inner side of the sleeve body.

10. A docking shaft structure capable of rapidly replacing a docking sleeve according to claim 1, wherein four sets of said through holes and radial locking members are provided in a radial direction; the shaft body is a rectangular spline shaft, and the sleeve body is a rectangular spline sleeve.