CN216882606U

CN216882606U - Self-adaptive pressure head for multi-point equal force application of press fitting and plugging

Info

Publication number: CN216882606U
Application number: CN202220653055.2U
Authority: CN
Inventors: 张忠浩; 李述东; 张国忠; 赵颖; 姜海鹏
Original assignee: Jilin Dongxin Tooling Equipment Co ltd
Current assignee: Jilin Dongxin Tooling Equipment Co ltd
Priority date: 2022-03-24
Filing date: 2022-03-24
Publication date: 2022-07-05
Anticipated expiration: 2032-03-24

Abstract

A self-adaptive pressure head for multi-point equal force application for press mounting and plugging relates to the field of assembly equipment and comprises a pressure head connecting handle, a pressure head body and a pressure head, wherein an O-shaped sealing ring is arranged on the contact surface of the pressure head body and the pressure head connecting handle; an oil pool is arranged at the upper end of the center of the pressure head body, and hydraulic oil is filled in the oil pool; the lower end of the center of the pressure head body is provided with a plurality of uniformly distributed pressure head mounting holes, and each pressure head mounting hole is internally provided with a pressure head; the upper end of the pressure head is provided with a shoulder which is arranged in the oil pool, and the size of the shoulder is larger than that of the pressure head mounting hole; and an ST-shaped sealing ring is arranged on the contact surface of the pressure head and the inner wall of the pressure head mounting hole. The utility model can effectively solve the problems of equal force application and plugging of unequal high points caused by the structure or manufacturing problem of the workpiece, provides an effective solution for effectively ensuring the working conditions of single bushing, multi-point plane press mounting, air seal plugging and the like, reduces the manufacturing cost of equipment, improves the stability and reliability of the equipment and improves the assembly precision of the workpiece.

Description

Self-adaptive pressure head for multi-point equal force application of press fitting and plugging

Technical Field

The utility model relates to the technical field of assembly equipment, in particular to a multi-point equal force application self-adaptive pressure head for press fitting and plugging.

Background

When the existing bearing, the bush 8, the retainer ring and the like are assembled in a press fitting manner, due to the manufacturing precision, the plane of the pressure head 6 and the plane of the bush 8 of the pressed part cannot be guaranteed to be in full contact, and a gap delta is formed at a certain position when the pressure head 6 and the bush 8 are in contact, as shown in fig. 1; if the rigidity of the pressure head 6 and the lining 8 is enough, the contact gap delta cannot be eliminated, so that uneven stress is applied to the lining 8 and the body 9 of the part to be pressed in the circumference in the pressing process, the lining 8 deflects, and the assembling quality cannot meet the requirement.

In the assembling process of a plurality of automobile parts, multi-point total power is often required to be pressed at one time, for example, the automobile hub bolt bushing is pressed. The automobile hub assembly needs one-time press-fitting stroke to complete press-fitting of five bolt bushings, and has higher requirements on press-fitting force and position accuracy of the five bushings. Due to manufacturing errors, the working surfaces of the five pressure heads and the upper surface of the automobile hub assembly are difficult to keep on the same plane, and due to the manufacturing tolerance influence of the bushing and the hole, the interference magnitude of each set of assembly is different, so that the consistent press-fitting force of each press-fitting point is difficult to ensure. Due to the problem of the distance between the bushings, five independent pressure heads cannot be arranged at the same time, and even if the five independent pressure heads can be arranged, the five pressure heads cannot be accurately and cooperatively controlled due to multipoint unequal high-pressure mounting, so that the pressing force and the position precision of the bushings are deviated, and the potential safety hazard of automobile driving is caused.

For some closed cavities, before assembly, the air tightness of the cavities needs to be detected, such as an automobile water pump body, an engine cylinder body, an oil pan and the like. Because each cavity has holes for exchanging with the outside, each hole needs to be plugged when air tightness detection is carried out, namely, multi-point plugging is carried out. In order to guarantee the beat of airtight detection and save cost, one pressure head is generally adopted for multi-point plugging. The mode that adopts at present mainly takes spring shutoff pressure head as the owner, as shown in figure 2, pressure head 6 can arrange in pressure head body 5 according to the shutoff point, can effectively solve the problem that the multiple spot shutoff is not high. However, since the displacement of the pressure heads 6 is adjusted by the expansion amount of the spring 10, the acting force of each pressure head 6 on the plugging point is not uniform, even the acting force is greatly different, and the leakage condition is easy to occur at a certain point position when the sealing test is performed at the moment, so that the detection effect is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a self-adaptive pressure head for multi-point equal force application for press fitting and plugging, which is suitable for multi-point unequal height plugging of ring sleeves, disc covers and the like and cavity sealing tests in related mechanical industries in the automobile industry.

The technical scheme adopted by the utility model for solving the technical problem is as follows:

the utility model relates to a self-adaptive pressure head for multi-point equal force application for press mounting and plugging, which comprises: the pressure head connecting device comprises a pressure head connecting handle connected with a main shaft of the press-mounting machine, a pressure head body connected with the pressure head connecting handle through a hexagon socket head cap screw and a pressure head, wherein an O-shaped sealing ring is arranged on the contact surface of the pressure head body and the pressure head connecting handle; an oil pool is arranged at the upper end of the center of the pressure head body, and hydraulic oil is contained in the oil pool; the lower end of the center of the pressure head body is provided with a plurality of uniformly distributed pressure head mounting holes, and a pressure head is mounted in each pressure head mounting hole; the upper end of the pressure head is provided with a shoulder which is arranged in the oil pool, the size of the shoulder is larger than that of the pressure head mounting hole, and the pressure head is limited by the shoulder to prevent the pressure head from separating from the pressure head body; and an ST-shaped sealing ring is arranged on the contact surface of the pressure head and the inner wall of the pressure head mounting hole.

Furthermore, the number of the pressure heads is 2-10.

Furthermore, the number of the pressure head mounting holes is 2-10.

Further, the number of the pressure heads is the same as that of the pressure head mounting holes.

Furthermore, every pressure head all is equipped with two ST shape sealing washer with pressure head mounting hole inner wall contact surface.

Further, the hydraulic oil cannot fill the whole oil pool, and a certain space should be reserved in the oil pool.

The utility model has the beneficial effects that:

the utility model relates to a multi-point equal force application self-adaptive pressure head for press mounting and plugging, which mainly comprises a pressure head connecting handle, hydraulic oil, an O-shaped sealing ring, a pressure head body, an oil pool, a pressure head, a shoulder and an ST-shaped sealing ring. The utility model can effectively solve the problems of equal force application and plugging of unequal high points caused by workpiece structures or manufacturing problems, provides an effective solution for effectively ensuring working conditions of single bushing, multi-point plane press mounting, air seal plugging and the like, reduces the manufacturing cost of equipment, and improves the stability and the reliability of the equipment.

The self-adaptive pressure head for press mounting and plugging and multi-point equal force application is mainly used for diluting and adapting to errors generated by each press mounting link such as pressure head movement, workpiece positioning and the like according to a Pascal principle, namely a liquid incompressible principle, so that the assembly precision of workpieces is improved.

Drawings

Fig. 1 is a schematic view of the assembly of a conventional press-fitting part bushing.

Fig. 2 is a schematic structural diagram of a conventional spring plugging pressure head.

Fig. 3 is a schematic structural diagram of the multi-point equal force-applying adaptive pressure head for press fitting and plugging of the present invention.

In the figure, 1, a pressure head connecting handle, 2, hydraulic oil, 3, a hexagon socket head cap screw, 4, an O-shaped sealing ring, 5, a pressure head body, 501, an oil pool, 502, a pressure head mounting hole, 6, a pressure head, 601, a shoulder, 7, an ST-shaped sealing ring, 8, a lining, 9, a part body to be pressed, 10 and a spring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 3, the present invention provides a multi-point equal force-applying adaptive pressure head for press-fitting and plugging, which mainly comprises: the pressure head comprises a pressure head connecting handle 1, hydraulic oil 2, an inner hexagon bolt 3, an O-shaped sealing ring 4, a pressure head body 5, a pressure head 6 and an ST-shaped sealing ring 7.

Wherein, the handle part of the pressure head connecting handle 1 is connected with the main shaft of the press-mounting machine to realize power transmission.

The pressure head body 5 is connected with the lower end of the pressure head connecting handle 1 through the hexagon socket head cap screw 3.

And an O-shaped sealing ring 4 is arranged on the contact surface A of the pressure head body 5 and the pressure head connecting handle 1 and is used for sealing the contact surface A.

The central upper end of pressure head body 5 is provided with oil bath 501, and the central lower extreme of pressure head body 5 is provided with a plurality of evenly distributed's pressure head mounting hole 502.

The oil pool 501 of the pressure head body 5 is filled with hydraulic oil 2.

All install pressure head 6 in a plurality of pressure head mounting hole 502 of pressure head body 5, according to different needs, the quantity of pressure head 6 can set up to 2 ~ 10, and the quantity of its pressure head mounting hole 502 that corresponds also is 2 ~ 10, and pressure head 6 should be the same with the quantity of pressure head mounting hole 502 promptly.

The upper end of the pressure head 6 is provided with a shoulder 601, the shoulder 601 is installed in the oil pool 501, the size of the shoulder 601 is larger than that of the pressure head installation hole 502, the pressure head 6 can be limited through the shoulder 601, and the pressure head 6 is prevented from being separated from the pressure head body 5.

Because the cooperation between the pressure head 6 and the pressure head body 5 is a movable fit, the ST-shaped sealing rings 7 are installed on the contact surfaces of the pressure head 6 and the inner wall of the pressure head mounting hole 502, and two ST-shaped sealing rings 7 are arranged on the contact surfaces of each pressure head 6 and the inner wall of the pressure head mounting hole 502.

As shown in fig. 3, the multi-point equal force application self-adaptive pressure head for press fitting and plugging has the following working principle:

in the non-operating state, the axial positions of the respective indenters 6 are uneven due to manufacturing errors, with a height difference b therebetween. In the working condition of press-fitting a plurality of bushings 8, when the adaptive pressure head assembly moves downwards, one pressure head 6 firstly contacts one of the corresponding bushings 8 due to the influences of the structure of a workpiece, the manufacturing error of the pressure head 6, the manufacturing error of the workpiece and the like; because the space is reserved in the oil pool 501 of the pressure head body 5, the whole oil pool 501 is not filled with the hydraulic oil 2, the pressure head 6 which is contacted with the pressure head body firstly moves upwards for a certain distance b, and the space of the oil pool 501 is occupied; at this point, the adaptive ram assembly is still moving down as a whole, and the other rams 6 are in successive contact with the bushings 8; in the whole press mounting process, the heights of all the press heads 6 are randomly and adaptively adjusted; the press-fitting force F of the press-fitting machine is transmitted to each press head 6 through the incompressibility of the hydraulic oil 2, and the output force of each press head 6 is the same because the oil pressure of each point in the oil pool 501 is equal, so that the multipoint equal force application in the press-fitting process is completed.

Due to the self-adaptive condition of the hydraulic oil 2, the length manufacturing precision of the pressure head 6 can be specified widely, and the structures of the oil pool 501 and the shoulder 601 of the pressure head 6 do not need precise dimensional tolerance and form and position tolerance, so that the production cost can be effectively reduced. The self-adaptive pressure head for multi-point equal force application of press fitting and plugging is also suitable for total power multi-point plugging in an airtight test.

In the description of the present invention, it is to be understood that the terms "central", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the scope of the present invention.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, but such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-point equal force application self-adaptive pressure head for press fitting and plugging comprises: the pressure head connecting device comprises a pressure head connecting handle (1) connected with a main shaft of the press-fitting machine, a pressure head body (5) connected with the pressure head connecting handle (1) through an inner hexagon bolt (3), and a pressure head (6), and is characterized in that an O-shaped sealing ring (4) is arranged on the contact surface of the pressure head body (5) and the pressure head connecting handle (1); an oil pool (501) is arranged at the upper end of the center of the pressure head body (5), and hydraulic oil (2) is contained in the oil pool (501); the lower end of the center of the pressure head body (5) is provided with a plurality of pressure head mounting holes (502) which are uniformly distributed, and a pressure head (6) is mounted in each pressure head mounting hole (502); the upper end of the pressure head (6) is provided with a shoulder (601), the shoulder (601) is installed in the oil pool (501), the size of the shoulder (601) is larger than that of the pressure head installation hole (502), and the pressure head (6) is limited by the shoulder (601) to be prevented from being separated from the pressure head body (5); and an ST-shaped sealing ring (7) is arranged on the contact surface of the pressure head (6) and the inner wall of the pressure head mounting hole (502).

2. The adaptive pressure head for multi-point equal force application of press-fitting and plugging according to claim 1, wherein the number of the pressure heads (6) is 2-10.

3. The adaptive pressure head for pressure mounting and plugging with multi-point equal force application according to claim 1, wherein the number of the pressure head mounting holes (502) is 2-10.

4. The adaptive pressure head for pressing and blocking with equal force at multiple points as claimed in claim 1, characterized in that the number of the pressure heads (6) and the pressure head mounting holes (502) is the same.

5. The adaptive pressure head for multi-point equal force application of press-fitting and plugging according to claim 1, characterized in that each pressure head (6) is provided with two ST-shaped sealing rings (7) at the contact surface with the inner wall of the pressure head mounting hole (502).

6. The adaptive pressure head for multi-point equal force application of press-fitting and plugging according to claim 1, wherein the hydraulic oil (2) cannot fill the whole oil pool (501), and a certain space should be reserved in the oil pool (501).