CN218325234U

CN218325234U - Tool for testing air tightness of metal end cover

Info

Publication number: CN218325234U
Application number: CN202221674817.3U
Authority: CN
Inventors: 魏迎春; 孙伟亮
Original assignee: Wuxi Weiyan Jinggong Technology Co ltd
Current assignee: Wuxi Weiyan Jinggong Technology Co ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2023-01-17
Anticipated expiration: 2032-06-30

Abstract

The utility model relates to a test frock for metal end cover air tightness performance, including last frock and lower frock, go up the frock and can mutually support between the frock down, go up the frock and include the upper plate, be provided with the adjustment post below the upper plate, be connected with the top board below the adjustment post, evenly distributed has a plurality of linear bearing in the top board, and it is provided with the guide bar to slide respectively in the linear bearing, the lower extreme of guide bar is provided with down the pressure head, be provided with the spring down between pressure head and the upper plate, the both ends of upper plate are provided with the guide pin bushing respectively, and the opposite angle is provided with the upper limit post below the upper plate. The utility model discloses a form of the flexible volume of fixed spring reaches the purpose that accurate control applied pressure on lid formula part, avoids lid formula part to produce deformation in the gas tightness test procedure, and the lower terminal surface of lower pressure head and the up end phase-match of lid formula part keep laminating mutually with lid formula part, avoid causing lid formula part additional damage.

Description

Tool for testing air tightness of metal end cover

Technical Field

The utility model belongs to the technical field of the test fixture, a test frock for metal end cover air tightness performance is related to.

Background

The automobile hydraulic pump needs good sealing performance and is used for preventing leakage, a metal end cover of the hydraulic pump is one of necessary parts of the hydraulic pump, and the metal end cover can be assembled only after being tested and qualified through an air tightness test; at present, in the airtight testing process of the cover-type part, because the pressure of the tooling is difficult to control accurately, the cover-type part is easily applied with large pressure in the testing process to generate deformation, so that the size of the cover-type part is changed.

Disclosure of Invention

The utility model aims to overcome the not enough that exists among the prior art, solve test fixture and exert the problem that pressure too big production deformation to the part, provide a test frock for metal end cover air tightness can.

In order to achieve the purpose, the following technical scheme is adopted:

the tool for testing the air tightness of the metal end cover comprises an upper tool and a lower tool, wherein the upper tool and the lower tool can be matched with each other, the upper tool comprises an upper base plate, a guide sleeve, an upper pressing plate, a guide rod, a spring and a lower pressing head, an adjusting column is arranged below the upper base plate, the upper pressing plate is connected below the adjusting column, a plurality of linear bearings are uniformly distributed in the upper pressing plate, the guide rods are respectively arranged in the linear bearings in a sliding manner, the lower end of the guide rod is provided with a lower pressing head, the spring is arranged between the lower pressing head and the upper pressing plate, and the spring is respectively sleeved on the outer side of the guide rod; guide sleeves are respectively arranged at two end parts of the upper bottom plate, and upper limiting columns are arranged at opposite angles below the upper bottom plate; a product bottom plate is arranged on the lower bottom plate, a product profiling lug corresponding to the lower pressing head is arranged on the product bottom plate, air holes are respectively formed in the middle parts of the product profiling lugs, an air duct communicated with the air holes is arranged in the product bottom plate, the air duct is communicated with an inflation hole, and an air pipe joint is arranged on the outer side of the inflation hole; the lower bottom plate is provided with a guide pillar which can be matched with the guide sleeve, and the upper opposite angle of the lower bottom plate is provided with a lower limiting pillar which can be matched with the upper limiting pillar.

Preferably, handles are respectively arranged at two ends of the lower bottom plate.

Preferably, the upper end of the guide rod is provided with a limiting bolt, and a gasket is arranged between the limiting bolt and the guide rod.

Preferably, the lower pressing head is connected with the lower end of the guide rod by a bolt.

Preferably, the guide post is mounted on the lower base plate by a base, and the guide post and the base are fixed by a set screw.

Preferably, the number of the linear bearings is 10.

Preferably, the upper end of the upper limiting column is provided with a threaded hole, and the upper limiting column is connected with the upper base plate through a bolt.

Preferably, the upper end of the guide pillar is provided with a radius, and a chamfer is arranged at the inner lower end of the guide sleeve hole.

Preferably, the lower end face of the lower pressure head can be matched with the upper end face of the cover type part.

Preferably, a sealing ring is arranged in the product profiling convex block and is in contact with the inner top surface of the cover type part.

Compared with the prior art, the utility model,

has the following advantages:

the utility model discloses a form of the flexible volume of fixed spring reaches the purpose that accurate control applied to lid formula part upper pressure, and protection lid formula part can not receive too strong pressure in the gas tightness test procedure, avoids lid formula part to produce deformation, the utility model discloses lower terminal surface of pressure head and the up end phase-match of lid formula part down for the in-process that the pressure head was being pushed down keeps laminating mutually with lid formula part down, avoids causing the deformation of lid formula part.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the upper tool of the present invention.

Fig. 3 is a schematic sectional view of the upper tool of the present invention.

Fig. 4 is a schematic view of the product bottom plate of the present invention.

Fig. 5 is a schematic view of the cover part.

Fig. 6 is a schematic view of the guide bar of the present invention.

In the figure: 1. a guide post; 2. a guide sleeve; 3. an upper limiting column; 4. a lower restraint post; 5. a linear bearing; 6. a guide bar; 7. a spring; 8. a lower pressure head; 9. an upper pressure plate; 10. adjusting the column; 11. an upper base plate; 12. a lower base plate; 13. a product base plate; 14. a seal ring; 15. a gas pipe joint; 16. a product profiling lug; 17. a vent hole; 18. an air duct; 19. an inflation hole; 20. a handle; 21. a limit bolt; 22. a gasket; 23. a base; 24. a threaded hole; 25. rounding; 26. chamfering; 27. a lower end face; 28. an upper end surface; 29. an inner top surface; 30. a cover part.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

As shown in fig. 1-6, a tool for testing the air tightness of a metal end cover comprises an upper tool and a lower tool, wherein the upper tool and the lower tool can be matched with each other, the upper tool comprises an upper base plate 11, a guide sleeve 2, an upper pressure plate 9, a guide rod 6, a spring 7 and a lower pressure head 8, an adjusting column 10 is arranged below the upper base plate 11, the upper pressure plate 9 is connected below the adjusting column 10, the adjusting column 10 can adjust the distance between the upper pressure plate 9 and the upper base plate 11, and the upper base plate 11 is used for bearing each part of the upper tool;

a plurality of linear bearings 5 are uniformly distributed in the upper pressing plate 9, guide rods 6 are respectively arranged in the linear bearings 5 in a sliding manner, and the linear bearings 5 are convenient for the guide rods 6 to slide up and down in the upper pressing plate 9; the lower end of the guide rod 6 is provided with a lower pressure head 8, and the lower pressure head 8 is used for pressing the cover type part; a spring 7 is arranged between the lower pressure head 8 and the upper pressure plate 9, the springs 7 are respectively sleeved on the outer sides of the guide rods 6, and the springs 7 are used for applying downward force to the lower pressure head 8; guide sleeves 2 are respectively arranged at two end parts of the upper bottom plate 11, and upper limiting columns 3 are arranged diagonally below the upper bottom plate 11;

a product bottom plate 13 is arranged on the lower bottom plate 12, a product profiling lug 16 corresponding to the lower pressure head 8 is arranged on the product bottom plate 13, and the product profiling lug 16 is used for bearing a cover type part 30; the middle parts of the product profiling lugs 16 are respectively provided with vent holes 17, a vent pipeline 18 communicated with the vent holes 17 is arranged inside the product bottom plate 13, the vent pipeline 18 is communicated with an inflation hole 19, and the outer side of the inflation hole 19 is provided with a gas pipe joint 15; the gas enters the ventilation pipeline 18 through the gas pipe connector 15 and the inflation hole 19 and can flow out through the ventilation hole 17; the lower bottom plate 12 is provided with a guide pillar 1 which can be matched with the guide sleeve 2, and the guide pillar 1 and the guide sleeve 2 are matched with each other, so that the upper tool is correctly matched with the lower tool when moving up and down; the lower limiting columns 4 capable of being matched with the upper limiting columns 3 are arranged on the upper opposite corners of the lower bottom plate 12, the lower limiting columns 4 are matched with the upper limiting columns 3 and used for limiting the minimum distance between the upper bottom plate 11 and the lower bottom plate 12, namely the minimum distance between the upper pressing plate 9 and the product bottom plate 13 is limited, and the maximum compression amount of the spring 7 is fixed, namely the maximum pressure applied by the spring 7 to the lower pressing head 8 is fixed.

Further, handles 20 are respectively arranged at two ends of the lower bottom plate 12, and the handles 20 are convenient for tool disassembly and replacement.

Furthermore, the upper end of the guide rod 6 is provided with a limit bolt 21, a gasket 22 is arranged between the limit bolt and the guide rod 6, and the gasket 22 prevents the guide rod 6 from being separated from the linear bearing 5.

Further, the lower ram 8 is connected to the lower end of the guide bar 6 by means of bolts.

Further, the guide post 1 is mounted on the lower plate 12 by a base 23, and the guide post 1 and the base 23 are fixed by a set screw.

Further, the number of the linear bearings 5 is 10.

Further, the upper end of the upper limiting column 3 is provided with a threaded hole 24, and the upper limiting column 3 is connected with the upper bottom plate 11 through a bolt.

Furthermore, the upper end of the guide pillar 1 is provided with a radius 25, the inner lower end of the hole of the guide sleeve 2 is provided with a chamfer 26, and the radius 25 and the chamfer 26 are convenient for the guide pillar 1 to be correctly matched with the guide sleeve 2.

Preferably, the lower end face 27 of the lower ram 8 is able to match the upper end face 28 of the cover element 30, better protecting the cover element 30 against deformation when subjected to pressure.

Further, a sealing ring 14 is arranged in the product profiling convex block 16, the sealing ring 14 is in contact with the inner top surface 29 of the cover part 30, the sealing ring 14 enables gas flowing out of the vent hole 17 to be kept in the cover part 30 and cannot leak, and then whether the cover part 30 has a problem or not is judged through an airtight detection instrument externally connected with the air pipe connector 15.

The working principle is as follows: when the tool is used for testing the air tightness of the

cover type parts

30, 10 cover type parts 30 are placed on a product profiling lug 16, a pneumatic device and an upper tool are pressed downwards, in the pressing-down process, a guide sleeve 2 is matched with a guide pillar 1 for positioning, a lower pressing head 8 is pressed downwards along with an upper bottom plate 11, it is known that an upper limiting pillar 3 is abutted against a lower limiting pillar 4, the upper tool and the lower tool reach the minimum matching distance, the distance between an upper pressing plate 9 and a product bottom plate 13 is fixed, the contraction of a spring 7 is also fixed, and the maximum pressure applied by the spring 7 to the lower pressing head 8 is fixed; at this time, the inner top surface 29 of the cover part 30 contacts the sealing

ring

14, and 10 cover parts 30 form a closed space with the product bottom plate 13, and at this time, an airtight detection instrument externally connected to the air pipe connector 15 can perform airtight detection on the space.

It is to be understood that the above embodiments are merely exemplary embodiments that have been employed to illustrate the principles of the present invention, and that the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.

Claims

1. The utility model provides a test frock for metal end cover air tightness, includes frock and lower frock, characterized by: the upper tool and the lower tool can be matched with each other, the upper tool comprises an upper bottom plate (11), a guide sleeve (2), an upper pressure plate (9), a guide rod (6), a spring (7) and a lower pressure head (8), an adjusting column (10) is arranged below the upper bottom plate (11), the upper pressure plate (9) is connected below the adjusting column (10), a plurality of linear bearings (5) are uniformly distributed in the upper pressure plate (9), the guide rods (6) are respectively arranged in the linear bearings (5) in a sliding manner, the lower end of the guide rod (6) is provided with the lower pressure head (8), the spring (7) is arranged between the lower pressure head (8) and the upper pressure plate (9), and the spring (7) is respectively sleeved on the outer side of the guide rod (6); guide sleeves (2) are respectively arranged at two end parts of the upper bottom plate (11), and upper limiting columns (3) are arranged diagonally below the upper bottom plate (11); a product bottom plate (13) is arranged on the lower bottom plate (12), a product profiling lug (16) corresponding to the lower pressing head (8) is arranged on the product bottom plate (13), air holes (17) are respectively formed in the middle of the product profiling lug (16), an air duct (18) communicated with the air holes (17) is arranged inside the product bottom plate (13), the air duct (18) is communicated with an air inflation hole (19), and an air pipe joint (15) is arranged on the outer side of the air inflation hole (19); the lower bottom plate (12) is provided with a guide post (1) which can be matched with the guide sleeve (2), and the upper opposite angle of the lower bottom plate (12) is provided with a lower limiting post (4) which can be matched with the upper limiting post (3).

2. The tooling for testing the air tightness of the metal end cover according to claim 1, wherein: handles (20) are respectively arranged at two ends of the lower bottom plate (12).

3. The tooling for testing the air tightness of the metal end cover according to claim 1, which is characterized in that: the upper end of the guide rod (6) is provided with a limiting bolt (21), and a gasket (22) is arranged between the limiting bolt and the guide rod (6).

4. The tooling for testing the air tightness of the metal end cover according to claim 1, which is characterized in that: the lower pressure head (8) is connected with the lower end of the guide rod (6) by a bolt.

5. The tooling for testing the air tightness of the metal end cover according to claim 1, which is characterized in that: the guide post (1) is arranged on the lower bottom plate (12) through a base (23), and the guide post (1) and the base are fixed through a set screw.

6. The tooling for testing the air tightness of the metal end cover according to claim 1, which is characterized in that: the number of the linear bearings (5) is 10.

7. The tooling for testing the air tightness of the metal end cover according to claim 1, which is characterized in that: the upper end of the upper limiting column (3) is provided with a threaded hole (24), and the upper limiting column (3) is connected with the upper base plate (11) through a bolt.

8. The tooling for testing the air tightness of the metal end cover according to claim 1, which is characterized in that: the upper end of the guide pillar (1) is provided with a radius (25), and the inner lower end of the hole of the guide sleeve (2) is provided with a chamfer (26).

9. The tooling for testing the air tightness of the metal end cover according to claim 4, wherein: the lower end face (27) of the lower pressure head (8) can be matched with the upper end face (28) of the cover type part (30).

10. The tooling for testing the air tightness of the metal end cover according to claim 1, which is characterized in that: and a sealing ring (14) is arranged in the product profiling convex block (16), and the sealing ring (14) is contacted with the inner top surface (29) of the cover type part (30).