Airtightness detection clamp capable of realizing end surface floating

Abstract

The utility model provides an air tightness detection clamp capable of realizing end surface floating, relates to an air tightness detection clamp, and is used for solving the technical problem that air tightness detection cannot be realized because a gap is generated between a workpiece and the clamp in a floating state. Through the air pipe connected between the air hole outlet and the air hole inlet, the inclined air path arranged in the supporting piece and the air hole in the positioning end face, air path communication among the body assembly, the connecting disc and the supporting piece is achieved. The floating gasket is installed between the connecting disc and the supporting piece, the floating gap is controlled through the gap bolt, the workpiece is attached to the positioning end of the supporting piece to be installed, the air hole in the positioning end is sealed, and then the airtightness detection requirement of the workpiece in the floating state can be met.

Description

Technical Field

[0001] The utility model relates to an airtight detection fixture, in particular to an airtight detection fixture capable of realizing end surface floating. Background Art

[0002] Some workpieces of automobiles need to rotate during the machining process, and the fixtures used for the workpieces need to rotate with the workpieces. Therefore, the end faces of the car fixtures have the function of positioning and floating. Since the end faces of the fixtures that are in contact with the workpieces are very likely to have gaps during the floating process, this is why it is difficult for rotary fixtures to achieve end face airtightness detection. With the development and popularization of intelligent manufacturing, the airtightness detection of fixtures is becoming more and more important. The machining of workpieces requires airtightness detection of the end faces while achieving end face positioning and floating. It is easy for a gap to form between the workpiece and the fixture in the floating state, and the gap can easily hinder the airtightness detection. Therefore, it is extremely important to design a fixture that can achieve end face floating and airtightness detection at the same time. Utility Model Content

[0003] The utility model aims to solve the technical problem that a gap is generated between a workpiece and a fixture in a floating state and airtight detection cannot be achieved, and proposes an airtight detection fixture capable of achieving end face floating.

[0004] In order to solve the above technical problems, the technical solutions provided by the utility model are as follows:

[0005] An airtight detection fixture capable of realizing end face floating comprises a body component and a connection plate mounted on the upper surface of the body component, wherein the connection plate is an annular structure; a rotating shaft nested inside the body component is arranged in the central axis direction of the body component, and the upper end of the rotating shaft protrudes from the body component and passes through the connection plate to be connected to a workpiece; the special features thereof are:

[0006] It also includes a support member coaxially installed in the connection plate, a floating group coaxially arranged inside the support member, and an air path group; a gap is provided in the axial direction between the support member and the body component, and a gap is provided in the axial direction between the support member and the floating group; a circular hole for passing the rotating shaft is provided in the center of the support member and the floating group; a positioning end is provided on the upper end surface of the support member, and the upper end surface of the positioning end is used to abut against the lower end surface of the workpiece;

[0007] The gas circuit assembly includes an axial gas circuit arranged in the rotating shaft along the central axis direction and a radial gas circuit arranged inside the body component along the radial direction of the body component, one end of the radial gas circuit is connected to the outer surface of the body component and a plug is installed at the end, and the other end is connected to the axial gas circuit;

[0008] The outer side surface of the connecting plate is provided with an air hole outlet, which is connected to the air hole inlet provided on the upper end surface of the support member through an air pipe; the upper end surface of the positioning end is provided with an air hole, and the interior of the support member is also provided with an oblique air path connected to the air hole inlet, one end of the oblique air path leads to the outer side surface of the support member and a plug is installed at the end, and the other end is connected to the air hole;

[0009] A connecting air path is provided in the connecting disk and the body component, which is used to connect the radial air path with the air hole outlet.

[0010] Furthermore, a placement groove is provided on the lower end surface of the support member for placing the floating group; the diameter of the placement groove is larger than the diameter of the circular hole on the support member.

[0011] Furthermore, the floating group includes a gasket and a floating gasket, the gasket is fixed to the main body component by bolts, and the floating gasket abuts between the gasket and the inner wall of the support member; the gasket and the floating gasket are both provided with the circular hole for passing the rotating shaft.

[0012] Furthermore, the upper and lower end surfaces of the floating gasket are respectively provided with two symmetrical raised strips in the radial direction, and the longitudinal section of the raised strips is semicircular; the lower end surface of the floating gasket is also provided with a raised strip, and the diameter of the raised strip on the upper end surface is perpendicular to the diameter of the raised strip on the lower end surface.

[0013] Furthermore, the support member is connected to the main body assembly through a gap bolt, and a gasket is provided at the connection; the gap bolt is a step column structure, and the diameter of its upper part is larger than the diameter of the lower part, the upper part of the gap bolt is connected to the support member, and the lower part is connected to the main body assembly, which is used to control the gap between the support member and the main body assembly.

[0014] Furthermore, a part of the connecting air circuit is arranged inside the connecting disk and communicated with the air hole outlet; another part of the connecting air circuit is arranged inside the main body component and communicated with the radial air circuit; a sealing ring is provided at the connection point of the two parts of the connecting air circuit.

[0015] Furthermore, the number of the radial air paths is 3, and the center angles between any two adjacent radial air paths are the same.

[0016] Furthermore, the number of the air hole inlets, the air hole outlets, the oblique air paths and the positioning ends are the same as the number of the radial air paths and correspond one to one.

[0017] Furthermore, an O-ring is provided at the connection between the connecting plate and the supporting member.

[0018] Beneficial effects of the utility model:

[0019] 1. The utility model realizes the air path connection between the main body component, the connecting plate and the support member through the air pipe connected between the air hole outlet and the air hole inlet, the oblique air path set inside the support member, and the air hole on the positioning end face. The workpiece is installed in a close contact with the positioning end, and the air hole on the positioning end is sealed, so that the airtight detection requirement of the workpiece in the floating state can be achieved.

[0020] 2. In the utility model, the upper and lower end faces of the floating gasket are provided with raised strips, and the cross-section of the raised strips is semicircular, which ensures that the contact surfaces between the upper and lower ends of the floating gasket and other structures are in line contact. Under the action of the tightening force of the clamp, the support member drives the floating gasket to float, and the line contact can ensure that the floating gasket can easily float.

[0021] 3. A gap is left between the support and the main body assembly of the utility model, which is convenient for the support to float. The gap can be controlled by the floating gasket and the height of the gasket. When the support and the main body assembly are connected, a gap bolt with a wide top and a narrow bottom is used, which will not completely press the support and the main body assembly, thereby ensuring the floating space of the support. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a cross-sectional view of an embodiment of an airtight detection fixture capable of achieving end surface floating according to the utility model;

[0023] Figure 2 This is a structural schematic diagram of an embodiment of an airtight detection fixture capable of realizing end surface floating according to the utility model;

[0024] Figure 3 for Figure 1 A partial enlarged view of

[0025] Figure 4 This is a schematic diagram of the support structure of an embodiment of an airtight detection fixture capable of achieving end surface floating according to the utility model;

[0026] Figure 5 This is a schematic diagram of the connection plate structure of an embodiment of an airtight detection fixture capable of achieving end surface floating according to the utility model;

[0027] Figure 6 This is a schematic diagram of the gap bolt structure of an embodiment of an airtight detection fixture capable of realizing end surface floating according to the utility model;

[0028] Figure 7 This is a schematic diagram of the floating gasket structure of an embodiment of an airtight detection fixture capable of realizing end surface floating of the utility model;

[0029] Figure 8 The utility model is a schematic diagram of a gasket structure of an embodiment of an airtight detection fixture capable of realizing end surface floating.

[0030] Description of reference numerals:

[0031] 1-connecting plate, 11-air hole outlet; 2-main body assembly; 21-rotating shaft, 22-axial air path, 23-radial air path; 3-support, 31-air hole inlet, 32-placement groove, 33-floating gasket, 331-raised strip, 34-gasket, 35-oblique air path, 36-positioning end; 4-clearance bolt, 41-washer; 5-workpiece; 6-air pipe; 7-plug; 8-connecting air path, 81-sealing ring; 9-O-ring. DETAILED DESCRIPTION

[0032] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0033] A gas-tight detection fixture capable of realizing end surface floating, such as Figure 1 , Figure 2 As shown, it includes a main body component 2 of the clamp and a connecting plate 1 installed on the upper surface of the main body component 2. A rotating shaft 21 is arranged in the direction of the central axis of the main body component 2 and is nested inside the main body component 2. Both ends of the rotating shaft 21 protrude from the main body component 2. The upper end is used to install the workpiece 5, and the lower end is provided with an axial air path 22 along the central axis. The axial air path 22 extends to the upper end of the main body component 2 and then connects to a radial air path 23. The radial air path 23 leads to the outer surface radially along the main body component 2, and a plug 7 is arranged in one end leading to the outer surface. In this embodiment, there are 3 radial air paths 23 in total, and the central angles of the 3 radial air paths 23 are the same. As shown Figure 5 As shown, the connecting plate 1 is an annular plate body, and its upper and lower end surfaces are provided with threaded holes for installing bolts. The connecting plate 1 is fixed to the upper surface of the main body component 2 by bolts. The side of the connecting plate 1 is provided with an air hole outlet 11, and the number of the air hole outlets 11 is 3, which are evenly distributed along the circumference of the outer side of the connecting plate 1. A connecting air path 8 is also provided between the air hole outlet 11 and the radial air path 23, which is used to connect the air hole outlet 11 and the radial air path 23. A part of the connecting air path 8 is distributed on the main body component 2, and the other part is distributed on the connecting piece, and a sealing ring 81 is provided at the connection between the two parts.

[0034] like Figure 3 , Figure 4 As shown, a support member 3 is installed at the inner circle in the middle of the connecting plate 1. The support member 3 is a cylindrical structure that is narrow at the top and wide at the bottom. The diameter of the lower end face is larger than the diameter of the upper end face. The support member 3 is connected in a step-like manner from narrow to wide. The wider lower part of the support member 3 is installed in the inner circle of the connecting plate 1, and an O-ring 9 is provided at the connection to prevent iron filings from entering the fixture. A circular hole is opened on the upper end face of the support member 3, and a placement groove 32 is provided inside. The diameter of the placement groove 32 is larger than the diameter of the circular hole. The support member 3 is also provided with gap screw holes evenly distributed along the circumference for installing gap bolts 4. As shown Figure 6As shown, the structure of the gap bolt 4 is wide at the top and narrow at the bottom, and the parts from wide to narrow are connected in a step-like manner. The gap screw hole is wide at the top and narrow at the bottom, the wider upper part is adapted to the head diameter of the gap bolt 4, and the narrower lower part is adapted to the wider upper half of the gap bolt 4. The narrower lower part of the gap bolt 4 is connected to the main body component 2. To ensure that the support member 3 and the main body component 2 are not completely compressed, a gasket 41 is provided at the connection between the gap bolt 4 and the support member 3. While ensuring that the gap bolt 4 effectively compresses the support member 3, iron filings are prevented from entering the interior of the fixture.

[0035] like Figure 7 , Figure 8 As shown, a gasket 34 and a floating gasket 33 are placed inside the placement groove 32 of the support member 3. The gasket 34 is fixed to the main body component 2 by bolts, and the floating gasket 33 is placed above the gasket 34. A certain gap is left between the support member 3 and the main body component 2 to facilitate the floating of the support member 3. The gap is controlled by the gap bolt 4 and the height of the floating gasket 33 and the gasket 34. The upper and lower end faces of the floating gasket 33 are both provided with symmetrical raised strips 331. The straight line where the raised strip 331 of the upper end face is located is perpendicular to the straight line where the raised strip 331 of the lower end face is located, ensuring that the floating angle of the floating gasket 33 is maximized. The longitudinal section of the raised strip 331 is semicircular, the raised strip 331 of the upper end face is in line contact with the inner wall of the support member 3, and the raised strip 331 of the lower end face is also in line contact with the upper end face of the gasket. When the fixture is used to process the workpiece 5, the floating gasket 33 and the support member 3 float together. Since the longitudinal section of the raised strip 331 is semicircular, it can ensure that the contact with the floating pad 33 is linear, making it easier to float. The floating pad 33, the pad 34 and the upper end surface of the support member 3 are all provided with a circular hole in the center for passing the upper end of the rotating shaft 21.

[0036] The upper end surface of the support member 3 is also provided with an air hole inlet 31, and an air pipe 6 is connected between the air hole inlet 31 and the air hole outlet 11 on the side of the connecting member, and the air pipe 6 is a hose. Three positioning ends 36 are provided on the upper end surface of the support member 3, and air holes are provided on the positioning ends 36. Three oblique air paths 35 are provided in the narrow upper part of the support member 3, and one end of the oblique air path 35 leads to the outer side surface of the support member 3, and the other end leads to the positioning end 36 on the upper end surface of the support member 3. The air hole inlet 31 on the support member 3 is connected with the oblique air path 35. A gas with a certain pressure is applied to the inside of the clamp through the axial air path 22 on the body component 2, and the gas leads to the radial air path 23 along the axial air path 22, and then enters the air pipe 6 through the connecting air path 8 and the air hole outlet 11, and finally enters the oblique air path 35 through the air hole inlet 31. A plug 7 is installed in one port of the oblique gas path 35 leading to the outer side, so that the gas passes from the other port of the oblique gas path 35 to the air hole of the positioning end 36. When processing the workpiece 5, the workpiece 5 is first brought into contact with the positioning end 36 on the support 3, and the workpiece 5 blocks the air hole of the positioning end 36. Under the action of the clamp tension, the support 3 drives the floating gasket 33 to float. During the floating process of the workpiece 5, the external air pipe 6 can always maintain the effective connection of the air path, and perform air tightness detection on the positioning state of the workpiece 5. The fixture solves the need for air tightness detection of the workpiece 5 in the floating state.

Claims

1. An airtight detection fixture capable of realizing end face floating, comprising a body component (2) and a connection plate (1) mounted on the upper surface of the body component (2), wherein the connection plate (1) is an annular structure; a rotating shaft (21) is arranged in the central axis direction of the body component (2) and is nested inside the body component (2), wherein the upper end of the rotating shaft (21) protrudes from the body component (2) and passes through the connection plate (1) to be connected to a workpiece (5); characterized in that: It also comprises a support member (3) coaxially mounted in the connection plate (1), a floating group coaxially arranged inside the support member (3), and an air path group; a gap is arranged axially between the support member (3) and the body component (2), and a gap is arranged axially between the support member (3) and the floating group; a circular hole for passing the rotating shaft (21) is arranged at the center of each of the support member (3) and the floating group; a positioning end (36) is arranged on the upper end surface of the support member (3), and the upper end surface of the positioning end (36) is used to abut against the lower end surface of the workpiece (5); The gas path group comprises an axial gas path (22) arranged inside the rotating shaft (21) along the central axis direction and a radial gas path (23) arranged inside the body component (2) along the radial direction of the body component (2); one end of the radial gas path (23) is connected to the outer surface of the body component (2) and a plug (7) is installed at the end, and the other end is connected to the axial gas path (22); The outer side surface of the connecting plate (1) is provided with an air hole outlet (11), which is connected to an air hole inlet (31) provided on the upper end surface of the supporting member (3) through an air pipe (6); the upper end surface of the positioning end (36) is provided with an air hole, and the interior of the supporting member (3) is also provided with an oblique air path (35) connected to the air hole inlet (31), one end of the oblique air path (35) leads to the outer side surface of the supporting member (3) and a plug (7) is installed at the end, and the other end is connected to the air hole; A connecting air path (8) is provided inside the connecting disk (1) and the body component (2) for connecting the radial air path (23) and the air hole outlet (11).

2. The airtight detection fixture capable of realizing end surface floating according to claim 1, characterized in that: The lower end surface of the support member (3) is provided with a placement groove (32) for placing the floating group; the diameter of the placement groove (32) is larger than the diameter of the circular hole on the support member (3).

3. The airtight detection fixture capable of realizing end surface floating according to claim 2, characterized in that: The floating group comprises a gasket (34) and a floating gasket (33); the gasket (34) is fixed to the main body component (2) by bolts; the floating gasket (33) abuts between the gasket (34) and the inner wall of the support member (3); the gasket (34) and the floating gasket (33) are both provided with the circular hole for passing the rotating shaft (21).

4. The airtight detection fixture capable of realizing end surface floating according to claim 3, characterized in that: The upper and lower end surfaces of the floating gasket (33) are respectively provided with two symmetrical raised strips (331) along the radial direction, and the longitudinal section of the raised strips (331) is semicircular; the lower end surface of the floating gasket (33) is also provided with a raised strip (331), and the diameter of the raised strip (331) on the upper end surface is perpendicular to the diameter of the raised strip (331) on the lower end surface.

5. An airtight detection fixture capable of realizing end surface floating according to any one of claims 1 to 4, characterized in that: The support member (3) is connected to the main body component (2) via a gap bolt (4), and a washer (41) is provided at the connection; the gap bolt (4) is a stepped column structure, and the diameter of the upper part is larger than the diameter of the lower part; the upper part of the gap bolt (4) is connected to the support member (3), and the lower part is connected to the main body component (2), so as to control the gap between the support member (3) and the main body component (2).

6. The airtight detection fixture capable of realizing end surface floating according to claim 5, characterized in that: A portion of the connecting gas path (8) is arranged inside the connecting disk (1) and is in communication with the air hole outlet (11); another portion of the connecting gas path (8) is arranged inside the body component (2) and is in communication with the radial gas path (23); and a sealing ring (81) is provided at the connection point between the two portions of the connecting gas path (8).

7. The airtight detection fixture capable of realizing end surface floating according to claim 6, characterized in that: The number of the radial air paths (23) is 3, and the center angles between any two adjacent radial air paths (23) are the same.

8. The airtight detection fixture capable of realizing end surface floating according to claim 7, characterized in that: The number of the air hole inlets (31), the air hole outlets (11), the oblique air paths (35) and the positioning ends (36) are the same as the number of the radial air paths (23) and correspond one to one.

9. The airtight detection fixture capable of realizing end surface floating according to claim 8, characterized in that: An O-ring (9) is provided at the connection between the connection plate (1) and the support member (3).

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