CN219026567U

CN219026567U - Press-fit tool for valve body assembly

Info

Publication number: CN219026567U
Application number: CN202320122957.8U
Authority: CN
Inventors: 苏静; 苏海; 韩建伟; 张洋; 师永兴; 李永升
Original assignee: Weinan Meiyite Engine Emission Reduction Technology Co ltd
Current assignee: Weinan Meiyite Engine Emission Reduction Technology Co ltd
Priority date: 2023-02-06
Filing date: 2023-02-06
Publication date: 2023-05-16
Anticipated expiration: 2033-02-06

Abstract

The application discloses press-fit tooling for valve body assemblies to solve the problems that an existing press-fit tooling is complex in operation, large in assembly error and low in assembly yield. The tool comprises a tool main body, a positioning mechanism and a limiting mechanism, wherein the positioning mechanism and the limiting mechanism are arranged on the tool main body; the tool main body comprises a bottom plate, a limiting plate and a plurality of guide posts, wherein the guide posts are uniformly fixed along the circumferential direction of the bottom plate, the limiting plate is fixedly arranged on the guide posts and is positioned at the upper end of the bottom plate, a first through hole is formed in the center of the limiting plate, and the limiting plate moves up and down relative to the bottom plate through the guide posts; the positioning mechanism is divided into a valve body positioning mechanism and a gear shaft positioning mechanism, and the limiting mechanism comprises a height limiting column fixedly arranged on the upper surface of the bottom plate, wherein the height limiting column is used for limiting the minimum distance between the limiting plate and the bottom plate; the valve body can be dismantled fixedly to set up in limiting plate upper end, and the limiting plate lower extreme makes when contacting with limit high post gear shaft and valve body pressfitting assembly put in place.

Description

Press-fit tool for valve body assembly

Technical Field

The application relates to the technical field of press-fit tools, in particular to a press-fit tool for a valve body assembly.

Background

Frock, the technology equipment: refers to the generic term for various tools used in the manufacturing process. The tool comprises a cutter, a clamp, a die, a measuring tool, a checking tool, an auxiliary tool, a clamp tool, a station tool and the like, and the tool is generally used for short. The pressure assembly fixture is widely applied to industrial production and is a process device for carrying out interference connection on parts in an extrusion, stamping or other pressure mode.

In the automobile production process, the valve body and the gear shaft are required to be pressed and assembled into a valve body assembly shown in fig. 10, and the valve body is generally installed in a profiling positioning tool shown in fig. 11 in the prior art; firstly, fixing a gear shaft in a pressure head of press-fitting equipment, wherein a valve body is positioned at the lower end and the gear shaft is positioned at the upper end during assembly, manually visually observing the relative positions of the gear shaft and the valve body, observing and adjusting the azimuth of the gear shaft, so that the axis of the gear shaft and the axis of the valve body are positioned on the same straight line, and guaranteeing the centring of the gear shaft and the valve body; and then performing next press fitting, controlling press fitting equipment, and pressing the lower part of the gear shaft into a press fitting groove corresponding to the upper part of the valve body.

The mode of manually visually centering the gear shaft and the valve body needs to be repeatedly adjusted, so that time and labor are wasted, meanwhile, due to the difference between experiences of operators, the axis of the gear shaft and the axis of the valve body are often not centered, the assembly effect of press fitting is affected during press fitting, and meanwhile, uneven stress of a tool is easily caused, and the tool is damaged; the manual centering is high in precision requirement and high in difficulty, and the accumulated errors lead to difficult guarantee of finished product size and form and position tolerance; the gear shaft is fixed in a clearance in the pressure head, the gear shaft can possibly fall off in the press fitting process, the pressure head and the gear shaft bear relatively large external force in the whole press fitting process, and the inner cavities of the shaft and the press fitting head are easy to wear.

Disclosure of Invention

Therefore, the application provides a press-fit tool for a valve body assembly, so as to solve the problems of complex operation, large assembly error and low assembly yield of the existing press-fit tool.

In order to achieve the above object, the present application provides the following technical solutions:

the press-fit tool for the valve body assembly comprises a valve body and a gear shaft, wherein the press-fit tool comprises a tool main body, a positioning mechanism and a limiting mechanism, wherein the positioning mechanism is arranged on the tool main body;

the tool main body comprises a bottom plate, a limiting plate and a plurality of guide posts, wherein the guide posts are uniformly fixed along the circumferential direction of the bottom plate, the limiting plate is fixedly arranged on the guide posts and positioned at the upper end of the bottom plate, a first through hole is formed in the center of the limiting plate, and the limiting plate moves up and down relative to the bottom plate through the guide posts;

the positioning mechanism comprises a valve body positioning mechanism and a gear shaft positioning mechanism, wherein the valve body positioning mechanism comprises a positioning pin fixedly arranged on a limiting plate and a motor hole pin shaft and is used for positioning the valve body on the limiting plate; the gear shaft positioning mechanism comprises a fixed column fixedly arranged in the center of the upper end face of the bottom plate, a mounting hole is formed in the upper end face of the fixed column, the circle center of the mounting hole and the circle center of the first through hole are positioned on the same straight line, and the gear shaft is fixedly arranged in the mounting hole;

the limiting mechanism comprises a height limiting column fixedly arranged on the upper surface of the bottom plate, and the height limiting column is used for limiting the minimum distance between the limiting plate and the bottom plate;

the valve body can be dismantled fixedly to set up in limiting plate upper end, and the limiting plate lower extreme makes when contacting with limit high post gear shaft and valve body pressfitting assembly put in place.

Optionally, the upper parts of the guide posts are protruded out of the upper end face of the limiting plate, and a stop block is arranged at the top end of each guide post and used for limiting the maximum value of the distance between the limiting plate and the bottom plate.

Optionally, a spring is sleeved on the outer wall of each guide pillar, which is positioned between the limiting plate and the bottom plate, and the spring enables the limiting plate to rebound automatically after the press fit assembly of the valve body assembly is completed.

Optionally, the limiting plate is provided with a second through hole and a positioning pin mounting hole, and the second through hole and the positioning pin mounting hole are in interference fit with the motor hole pin shaft and the positioning pin respectively.

Optionally, the motor hole pin shaft is a stepped shaft, and the top end surface and the outer diameter of the shaft shoulder are both provided with round corners.

Optionally, the bottom plate is provided with a plurality of screw holes, wherein the first screw holes and the second screw holes are the same in size and symmetrically distributed along the center of the bottom plate.

Optionally, the number of limit for the height post is two at least, and two limit for the height post bottoms all are provided with the external screw thread of first screw hole and second screw hole adaptation.

Optionally, nuts are arranged at the bottoms of the height limiting columns, and the nuts are used for adjusting the installation height of the height limiting columns on the bottom plate.

Optionally, the fixed column is divided into a bottom column and a guide column, and the bottom column and the guide column are provided with an adaptive thread structure and are connected through a fastening nut.

Optionally, the valve further comprises a clamping mechanism, wherein the clamping mechanism is arranged at the upper end of the limiting plate and used for relatively fixing the valve body and the limiting plate.

Compared with the prior art, the application has the following beneficial effects:

1. the gear shaft and the valve body are fixed in the integral press-fit tool through the design of the fixing column and the limiting plate, the size and the position tolerance of two products needing press-fit are effectively guaranteed, the operation is simple, the assembly error is small, the yield is high after the assembly is completed, the gear shaft is mounted on the fixing column at the lower part, the mounting is firm, the abrasion is not easy to occur, meanwhile, the process of repeatedly adjusting the relative positions of the gear shaft and the valve body is omitted, and the assembly efficiency is high.

2. The design of the height limiting column ensures the assembly depth, and the situation that parts and tools are damaged due to excessive pressure applied by misoperation of workers in the assembly process is avoided.

3. The spring structure is added, and the limiting plate on the tool automatically resets after the work is finished while certain buffer protection is provided, so that the operation is convenient.

Drawings

For a more visual description of the prior art and the present application, exemplary drawings are presented below. It should be understood that the specific shape and configuration shown in the drawings should not be considered in general as limiting upon the practice of the present application; for example, based on the technical concepts and exemplary drawings disclosed herein, those skilled in the art have the ability to easily make conventional adjustments or further optimizations for the add/subtract/assign division, specific shapes, positional relationships, connection modes, dimensional scaling relationships, etc. of certain units (components).

FIG. 1 is a schematic view of the overall structure of an embodiment of the present application;

FIG. 2 is a schematic diagram of a guide post structure according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of a high compression spring according to an embodiment of the present application;

FIG. 4 is a schematic view of a limiting plate structure according to an embodiment of the present application;

FIG. 5 is a schematic view of a valve body positioning mechanism according to an embodiment of the present disclosure;

FIG. 6 is a schematic view of a bottom plate structure according to an embodiment of the present application;

FIG. 7 is a schematic view of a height-limiting column according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a fixing column according to an embodiment of the present application;

FIG. 9 is a schematic view of a clamping mechanism according to an embodiment of the present application;

FIG. 10 is a schematic view of the valve body assembly of the present application;

FIG. 11 is a schematic view of a tooling structure in the background art of the present application;

reference numerals illustrate:

1. a bottom plate; 2. a limiting plate; 3. a guide post; 4. a first through hole; 5. a positioning pin; 6. a motor hole pin shaft; 7. fixing the column; 8. a mounting hole; 9. height limiting column; 10. a stop block; 11. a high compression spring; 12. a second through hole; 13. a locating pin mounting hole; 14. a first threaded hole; 15. a second threaded hole; 16. a nut; 17. a bottom post; 18. a guide post; 19. a fastening nut; 20. and (5) quick clamp.

Detailed Description

The present application is further described in detail below with reference to the attached drawings.

In the description of the present application: unless otherwise indicated, the meaning of "a plurality" is two or more. The terms "first," "second," "third," and the like in this application are intended to distinguish between the referenced objects without a special meaning in terms of technical connotation (e.g., should not be construed as emphasis on degree or order of importance, etc.). The expressions "comprising", "including", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

The terms such as "upper", "lower", "left", "right", "middle", and the like, as referred to in this application, are generally used for convenience in visual understanding with reference to the drawings, and are not intended to be an absolute limitation of the positional relationship in actual products. Such changes in relative positional relationship are considered to be within the scope of the present description without departing from the technical concepts disclosed herein.

Examples

As shown in fig. 1, a press-fit tool for a valve body assembly, the valve body assembly comprises a valve body and a gear shaft, and the press-fit tool comprises a tool body, a positioning mechanism arranged on the tool body, and a limiting mechanism;

the tool main body comprises a bottom plate 1, a limiting plate 2 and a plurality of guide posts 3, wherein the guide posts 3 are uniformly fixed along the circumferential direction of the bottom plate 1, the limiting plate 2 is fixedly arranged on the guide posts 3 and positioned at the upper end of the bottom plate 1, a first through hole 4 is formed in the center of the limiting plate 2, and the limiting plate 2 moves up and down relative to the bottom plate 1 through the guide posts 3;

the positioning mechanism comprises a valve body positioning mechanism and a gear shaft positioning mechanism, wherein the valve body positioning mechanism comprises a positioning pin 5 and a motor hole pin shaft 6 which are fixedly arranged on the limiting plate 2 and is used for positioning the valve body on the limiting plate 2; the gear shaft positioning mechanism comprises a fixed column 7 fixedly arranged at the center of the upper end face of the bottom plate 1, a mounting hole 8 is formed in the upper end face of the fixed column 7, the circle center of the mounting hole 8 and the circle center of the first through hole 4 are positioned on the same straight line, and the gear shaft is fixedly arranged in the mounting hole 8;

the limiting mechanism comprises a height limiting column 9 fixedly arranged on the upper surface of the bottom plate 1, and the height limiting column 9 is used for limiting the minimum distance between the limiting plate 2 and the bottom plate 1;

the valve body can be dismantled fixedly to set up in limiting plate 2 upper end, and the gear shaft is assembled in place with the valve body pressfitting when limiting plate 2 lower extreme and limit for height post 9 contact.

An alternative embodiment: as shown in fig. 2, the number of the guide posts 3 is four, the guide posts 3 are close to four corners of the bottom plate 1, the guide posts 3 are connected and fastened with four threaded counter bores of the bottom plate 1 through inner hexagonal socket head screws, the upper parts of the guide posts 3 are protruded out of the upper end face of the limiting plate 2, the limiting plate 2 is connected and fastened with shoulder bushings through inner hexagonal socket head screws, the shoulder bushings are arranged on the outer walls of the guide posts 3, the top end of each guide post 3 is provided with a stop block 10, the stop blocks 10 are used for limiting the maximum distance between the limiting plate 2 and the bottom plate 1, the stop blocks 10 are connected and fastened with the guide posts 3 through inner hexagonal socket head screws, and overshoot and ejection during return of the limiting plate 2 are prevented.

An alternative embodiment: as shown in fig. 3, the outer wall of each guide pillar 3 between the limiting plate 2 and the bottom plate 1 is sleeved with a rectangular high-compression spring 11, and the rectangular high-compression spring 11 enables the limiting plate 2 to rebound automatically after the valve body assembly is pressed and assembled.

An alternative embodiment: as shown in fig. 4, the limiting plate 2 is provided with a second through hole 12 and a positioning pin mounting hole 13, the positioning pin mounting hole 13 is a blind hole, and the second through hole 12 and the positioning pin mounting hole 13 are respectively in interference fit with the motor hole pin shaft 6 and the positioning pin 5.

An alternative embodiment: as shown in fig. 5, the positioning pin 5 is a cylinder with a bevel angle at the upper end, the motor hole pin shaft 6 is a stepped shaft, the outer diameters of the top end surface and the shaft shoulder are both provided with a bevel angle, and the upper parts of the positioning pin 5 and the motor hole pin shaft 6 are both provided with a certain profiling design, so that the positioning accuracy of the valve body is ensured.

An alternative embodiment: as shown in fig. 6, the bottom plate 1 is a rectangular flat plate, and is provided with a plurality of threaded holes, wherein the first threaded holes 14 and the second threaded holes 15 are identical in size and symmetrically distributed along the center of the bottom plate 1, and the U-shaped grooves machined on two sides of the bottom plate 1 can be connected and fixed with the press-fitting equipment through a bolt structure.

An alternative embodiment: as shown in fig. 7, the number of the height limiting columns 9 is at least two, the bottoms of the two height limiting columns 9 are respectively provided with external threads matched with the first threaded holes 14 and the second threaded holes 15, the bottoms of the height limiting columns are respectively provided with a nut 16, and the nuts 16 are used for adjusting the installation height of the height limiting columns 9 on the bottom plate 1.

An alternative embodiment: as shown in fig. 8, the fixing column 7 is divided into a bottom column 17 and a guide column 18, and the bottom column 17 and the guide column 18 are provided with an adapted screw structure, and are connected by a fastening nut 19.

An alternative embodiment: as shown in fig. 9, the valve further comprises a clamping mechanism, wherein the clamping mechanism is a quick clamp 20 arranged at the upper end of the limiting plate 2 and used for relatively fixing the valve body and the limiting plate 2, and the quick clamp 20 is connected with a threaded hole of the limiting plate 2 through a screw and used for clamping the valve body.

An alternative embodiment: the clamping mechanism can be connected with the press fitting equipment by adopting a cylinder structure, and is automatically clamped, so that the operation is convenient and quick, and the safety is higher.

An alternative embodiment: the gravity of the upper half part of the valve body is supported by the press fit tool, and the structure of the lower half part is in a suspended state, so that when the valve body is made of aluminum materials, deformation or uneven stress release can possibly be caused to form cracks, the bearing structure of the lower half part of the valve body can be added to the tool main body, the stability of the whole tool in working is improved, press fit of similar materials and structural products can be realized rapidly, and the press fit tool is convenient and high in efficiency; on one hand, the press-fit size and tolerance can be ensured; on the other hand, the appearance of the product is ensured not to be damaged by pressure.

The working process comprises the following steps:

before press fitting, the gear shaft is vertically inserted into the inner hole of the guide post, then the valve body is placed on the limiting plate, the corresponding position cooperation of the locating pin and the motor hole pin shaft and the valve body is ensured, the contact surface is fully stuck, no shaking exists, the pressing head of the shaft pressing rod assembly is ensured to act on the center of the gear shaft, and press fitting of the valve body assembly is completed through press fitting equipment.

The embodiment has the following beneficial effects:

4. The press fit tool main body adopts a sectional embedded type and bolt connection structure, so that the dimension is ensured and the machining is convenient.

5. The positioning pin and the motor hole pin shaft adopt profiling structures to meet the positioning requirement of products and have a certain fixing effect.

Any combination of the technical features of the above embodiments may be performed (as long as there is no contradiction between the combination of the technical features), and for brevity of description, all of the possible combinations of the technical features of the above embodiments are not described; these examples, which are not explicitly written, should also be considered as being within the scope of the present description.

The foregoing has outlined and detailed description of the present application in terms of the general description and embodiments. It should be appreciated that numerous conventional modifications and further innovations may be made to these specific embodiments, based on the technical concepts of the present application; but such conventional modifications and further innovations may be made without departing from the technical spirit of the present application, and such conventional modifications and further innovations are also intended to fall within the scope of the claims of the present application.

Claims

1. The press-fit tool for the valve body assembly comprises a valve body and a gear shaft, and is characterized by comprising a tool main body, a positioning mechanism and a limiting mechanism, wherein the positioning mechanism and the limiting mechanism are arranged on the tool main body;

2. The press-fit tooling for the valve body assembly according to claim 1, wherein the upper parts of the guide posts are protruded out of the upper end face of the limiting plate, and a stop block is arranged at the top end of each guide post and used for limiting the maximum distance between the limiting plate and the bottom plate.

3. The press-fit tooling of the valve body assembly according to claim 2, wherein a spring is sleeved on the outer wall of each guide pillar between the limiting plate and the bottom plate, and the spring enables the limiting plate to rebound automatically after press-fit assembly of the valve body assembly is completed.

4. The press-fit tooling of the valve body assembly according to claim 1, wherein the limiting plate is provided with a second through hole and a positioning pin mounting hole, and the second through hole and the positioning pin mounting hole are in interference fit with the motor hole pin shaft and the positioning pin respectively.

5. The press-fit tooling for the valve body assembly according to claim 4, wherein the motor hole pin shaft is a stepped shaft, and the top end surface and the outer diameter of the shaft shoulder are both provided with rounded corners.

6. The press-fit tooling for a valve body assembly according to claim 1, wherein the base plate is provided with a plurality of threaded holes, wherein the first threaded holes and the second threaded holes are the same size and are symmetrically distributed along the center of the base plate.

7. The press-fit tooling for a valve body assembly of claim 6, wherein the number of height-limiting posts is at least two, and wherein the bottoms of both height-limiting posts are provided with external threads adapted to the first and second threaded holes.

8. The press-fit tooling for the valve body assembly according to claim 7, wherein nuts are arranged at the bottoms of the height limiting columns, and the nuts are used for adjusting the installation height of the height limiting columns on the bottom plate.

9. The press-fit tooling of the valve body assembly according to claim 1, wherein the fixed column is divided into a bottom column and a guide column, and the bottom column and the guide column are provided with an adaptive thread structure and are connected through a fastening nut.

10. The press-fit tooling of the valve body assembly according to claim 1, further comprising a clamping mechanism disposed at an upper end of the limiting plate for relative fixation of the valve body and the limiting plate.