Movable centering structure of clamp for positioning inner hole of workpiece

Abstract

The clamp movable centering structure comprises a centering seat, a push-pull type clamp mechanism, a self-centering pin and a pushing piece, a displacement sliding groove is formed in the centering seat, the self-centering pin is connected into the displacement sliding groove in a sliding mode, the self-centering pin is connected with one end of the pushing piece, and the other end of the pushing piece is connected with the push-pull type clamp mechanism. The other end of the pushing piece is fixedly connected with the push-pull type clamp mechanism, and the push-pull type clamp mechanism is fixedly installed on the centering base. When the push-pull type clamp mechanism drives the pushing piece to move transversely, the self-centering pin moves transversely along the displacement sliding groove, and the self-centering pin is used for fixing the plug pin to the position of an inner hole of a positioning workpiece. In the using process of the movable centering structure of the clamp, the self-centering pin is driven by the push-pull type clamp mechanism to transversely move along the displacement sliding groove, positioning and separation of the self-centering pin on an inner hole of a positioning workpiece can be achieved, operation is convenient, and the practicability is high. The movable centering structure of the clamp has the advantages of being simple and compact in structure, economical and applicable.

Description

Technical Field

[0001] The invention relates to the technical field of positioning workpiece clamping, and in particular to a movable centering structure of a clamp for positioning an inner hole of a workpiece. Background Art

[0002] The workpiece needs to be positioned by the inner hole for clamping. The positioning pin of the inner hole needs to be separated from the inner hole and the positioning action of the inner hole needs to be realized by the hydraulic component module. The fixture needs to be designed with hydraulic pipelines, solenoid valves, hydraulic components, mounting bases, hydraulic stations, etc. The component structure is complex, especially for the narrow space of the fixture positioning space, it is difficult to layout. The design is difficult, the fixture components are many, the configuration and production costs are high, and the space is small and the iron filings are difficult to clean. Summary of the invention

[0003] The purpose of the present invention is to provide a movable centering structure of a fixture for locating an inner hole of a workpiece, so as to solve the problem of poor clamping processing effect of locating the inner hole of the workpiece in the prior art.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] A movable centering structure of a fixture for positioning an inner hole of a workpiece, comprising a centering seat, a push-pull clamp mechanism, a self-centering pin and a push piece, wherein a displacement slide groove is provided on the centering seat, the self-centering pin is slidably connected in the provided displacement slide groove, the self-centering pin is connected to one end of the push piece, the other end of the push piece is fixedly connected to the push-pull clamp mechanism, and the push-pull clamp mechanism is fixedly mounted on the centering seat;

[0006] When the push member is driven to move laterally by the push-pull clamp mechanism, the self-centering pin is caused to move laterally along the displacement slot, and the self-centering pin is used to be fixed at the inner hole position of the positioning workpiece by a pin.

[0007] As a further solution of the present invention: the push-pull clamp mechanism includes a positioning block fixedly connected to the centering seat, a center rod slidably connected in the central axis hole of the positioning block, one end of the center rod is fixedly connected to the pushing piece, and the other end is fixedly connected to a slider, the slider is connected to a limiting bracket, the limiting bracket is fixedly connected to the positioning block, and the limiting bracket is hingedly connected to a handle piece, and the handle piece is fixedly connected to the slider.

[0008] As a further solution of the present invention: the positioning block is provided with an integrated plug-in block, the plug-in block is plugged into a transverse plug-in hole opened on the centering seat, and a locking block is threadedly connected to the plug-in block, and the positioning block is plugged and fixed on the centering seat through the locking block.

[0009] As a further solution of the present invention: the self-centering pin includes a cylindrical displacement body and a half-open cone lock body with an integrated structure, the cylindrical displacement body is used for sliding connection in the displacement slot, and the half-open cone lock body is used for fixing the pin in the inner hole position of the positioning workpiece.

[0010] As a further solution of the present invention: an avoidance groove and a plug-in lock groove are opened at the center position of the cylindrical displacement body, the opening direction of the avoidance groove is directly facing the push-pull clamp mechanism, and is used to avoid the lateral displacement of the push member, and the plug-in lock groove is used to be plugged and connected with the push member.

[0011] As a further solution of the present invention: a transverse guide groove is opened on the circumferential outer wall of the cylindrical displacement body, and the transverse guide groove is used for slidingly connecting the bottom end of the limiting auxiliary component, and the limiting auxiliary component is inserted and connected in the vertical plug hole opened on the centering seat, wherein the insertion depth between the limiting auxiliary component and the transverse guide groove can be adjusted.

[0012] As a further solution of the present invention: the limiting auxiliary part is a hexagon socket cylindrical head screw, the hexagon socket cylindrical head screw is inserted and connected in the vertical plug-in hole, and the plug-in position between the hexagon socket cylindrical head screw and the centering seat is fixed by a hexagonal nut.

[0013] As a further solution of the present invention: the push piece is a hexagon socket flat-end set screw.

[0014] Beneficial effects of the present invention:

[0015] (1) During the use of the movable centering structure of the clamp of the present application, it is convenient to fix the push-pull clamp mechanism on the centering seat. The push-pull clamp mechanism is connected to the self-centering pin through a push piece, so that the overall structure is simple to install and has a small size, which is suitable for installation and use in a narrow space of the clamp;

[0016] (2) A push-pull clamp mechanism is used as a standard part to play a clamping role, so that when the push-pull clamp mechanism drives the push piece to move laterally, the self-centering pin can move laterally along the displacement slide groove to achieve the positioning and separation of the self-centering pin from the inner hole of the positioning workpiece. The operation is convenient and fast for the operator, and the positioning is reliable;

[0017] (3) The self-centering pin includes a cylindrical displacement body and a half-open cone lock body with an integrated structure. The cylindrical displacement body is used for sliding connection in the displacement slide groove, and the half-open cone lock body is used for fixing the pin in the position of the inner hole of the positioning workpiece. The present application uses the half-open cone lock body to center the inner hole of the positioning workpiece, and the positioning is accurate and reliable, ensuring that the positioning angle of the entire workpiece and the machining allowance of the positioning inner hole of the blank in the subsequent process are uniform;

[0018] (4) During the use of the movable centering structure of the clamp of the present application, the problems of high manufacturing cost of the clamp and occupied space structure of the clamp caused by the use of hydraulic components are solved, so that the movable centering structure of the clamp of the present application is optimized and improved in design, the difficulty of clamp design is reduced, and it is more convenient for operators to clean iron filings of the clamp. The hydraulic operation time of the clamp is reduced, the processing efficiency of the clamp is improved, the cost is saved, and the processing production cycle is shortened. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 It is a cross-sectional schematic diagram of the centering seat of the present invention;

[0022] Figure 3 is a side view of the push-pull clamp mechanism of the present invention;

[0023] Figure 4 is a top view of the push-pull clamp mechanism of the present invention;

[0024] Figure 5 It is a schematic diagram of the self-centering pin structure of the present invention;

[0025] Figure 6 It is a schematic cross-sectional view of the self-centering pin of the present invention.

[0026] In the figure: 1. Centering seat; 10. Displacement slide; 11. Horizontal plug-in hole; 12. Vertical plug-in hole; 2. Push-pull clamp mechanism; 20. Positioning block; 21. Center rod; 22. Slider; 23. Limit bracket; 24. Handle piece; 25. Plug-in block; 26. Lock block; 3. Self-centering pin; 30. Cylindrical displacement body; 31. Half-open frustum lock body; 32. Horizontal guide groove; 300. Avoidance groove; 301. Plug-in lock groove; 4. Sliding piece; 5. Limiting auxiliary piece; 6. Hexagonal nut. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; in the description of the present invention, the meaning of "multiple" and "several" is at least two, for example two, three, etc., unless otherwise clearly and specifically defined.

[0029] See also Figures 1 to 6 As shown, the present invention is a movable centering structure of a clamp for locating an inner hole of a workpiece, comprising a centering seat 1, a push-pull clamp mechanism 2, a self-centering pin 3 and a pushing member 4. A displacement slot 10 is provided on the centering seat 1, and the self-centering pin 3 is slidably connected in the displacement slot 10. The self-centering pin 3 is connected to one end of the pushing member 4, and the other end of the pushing member 4 is fixedly connected to the push-pull clamp mechanism 2, and the push-pull clamp mechanism 2 is fixedly installed on the centering seat 1; wherein, when the pushing member 4 is driven to move laterally by the push-pull clamp mechanism 2, the self-centering pin 3 is laterally displaced along the displacement slot 10, and the self-centering pin 3 is used to be fixed at the position of the inner hole of the positioning workpiece by a pin.

[0030] During the use of the movable centering structure of the clamp of the present application, it is convenient to fix the push-pull clamp mechanism 2 on the centering seat 1. The push-pull clamp mechanism 2 is connected to the self-centering pin 3 through the pushing piece 4 to realize the lateral displacement of the self-centering pin 3 along the displacement slide groove 10, thereby realizing the positioning and disengagement of the self-centering pin 3 on the inner hole of the positioning workpiece. The operation is convenient, which solves the technical problem that it is difficult to arrange hydraulic parts for inner hole positioning in a narrow space environment, and solves the high manufacturing cost of the clamp caused by the use of hydraulic components and the space structure problem of the clamp occupied, so that the movable centering structure of the clamp of the present application is optimized and improved in design, the difficulty of clamp design is reduced, the operator can clean the iron filings of the clamp more conveniently, the hydraulic operation time of the clamp is reduced, the processing efficiency of the clamp is improved, the cost is saved, and the processing production cycle is shortened.

[0031] In this specific implementation mode, Figure 3 and Figure 4As shown, the push-pull clamp mechanism 2 includes a positioning block 20 fixedly connected to the centering seat 1, a center rod 21 slidably connected in the central axis hole of the positioning block 20, one end of the center rod 21 is fixedly connected to the push piece 4, and the other end is fixedly connected to the slider 22, the slider 22 is connected to the limit bracket 23, the limit bracket 23 is fixedly connected to the positioning block 20, and the limit bracket 23 is hingedly connected to the handle member 24, and the handle member 24 is fixedly connected to the slider 22; the push-pull clamp mechanism 2 in the present application is a standard manufacturing component structure, so that when the handle member 24 is rotated along the limit bracket 23 hinge, the handle member 24 can drive the slider 22 to move laterally along the limit bracket 23, so that the center rod 21 moves laterally along the positioning block 20, thereby realizing the push member 4 driving the self-centering pin 3 to move laterally, thereby realizing the positioning and disengagement of the self-centering pin 3 to the inner hole of the positioning workpiece, and the operation is convenient.

[0032] In this specific implementation mode, Figure 1 and Figure 3 As shown, the positioning block 20 is provided with an integrated plug-in block 25, which is plugged and connected in the transverse plug-in hole 11 opened on the centering seat 1, and the plug-in block 25 is threadedly connected to the locking block 26, and the positioning block 20 is plugged and fixed on the centering seat 1 through the locking block 26; during the installation process of the push-pull clamp mechanism 2 of the present application, it is convenient to plug and fix the push-pull clamp mechanism 2 as a whole on the centering seat 1, and the installation is convenient, ensuring the transverse displacement accuracy of the center rod 21 on the push-pull clamp mechanism 2, thereby ensuring that the self-centering pin 3 and the inner hole of the positioning workpiece have coaxial clamping.

[0033] In this specific implementation mode, Figure 5 and Figure 6 As shown, the self-centering pin 3 includes a cylindrical displacement body 30 and a half-open cone lock body 31 with an integrated structure. The cylindrical displacement body 30 is used to be slidably connected in the displacement slide groove 10, and the half-open cone lock body 31 is used to fix the pin in the position of the inner hole of the positioning workpiece; during the operation of the self-centering pin 3, it is convenient to drive its lateral displacement through the push-pull clamp mechanism 2 to achieve the positioning and disengagement of the inner hole of the positioning workpiece, wherein the cylindrical displacement body 30 is adapted to be slidably connected with the displacement slide groove 10, and the sliding connection is convenient, thereby ensuring the displacement accuracy of the cylindrical displacement body 30, and the inner hole of the positioning workpiece is positioned and centered through the half-open cone lock body 31, and the positioning is accurate and reliable, thereby ensuring that the positioning angle of the entire workpiece and the machining allowance of the positioning inner hole of the blank in the subsequent process are uniform.

[0034] In this specific implementation mode, Figure 6 As shown, an avoidance groove 300 and a plug-in lock groove 301 are opened at the center position of the cylindrical displacement body 30. The opening direction of the avoidance groove 300 is arranged opposite to the push-pull clamp mechanism 2 and is used to avoid the lateral displacement of the push member 4. The plug-in lock groove 301 is used to be plugged and connected with the push member 4 to facilitate the plug-in connection between the cylindrical displacement body 30 and the push member 4.

[0035] In this specific implementation mode, Figure 5 and Figure 6 As shown, a transverse guide groove 32 is opened on the circumferential outer wall of the cylindrical displacement body 30, and the transverse guide groove 32 is used for slidingly connecting the bottom end of the limiting auxiliary part 5, and the limiting auxiliary part 5 is inserted and connected in the vertical plug hole 12 opened on the centering seat 1, wherein the insertion depth between the limiting auxiliary part 5 and the transverse guide groove 32 can be adjusted; during the lateral displacement of the cylindrical displacement body 30 along the displacement slide groove 10, a limiting linear guide sliding structure is formed between the limiting auxiliary part 5 and the transverse guide groove 32 to avoid deflection of the cylindrical displacement body 30 during the lateral displacement process, thereby avoiding affecting the clamping accuracy of the inner hole of the blank positioning.

[0036] In this specific implementation mode, Figure 1 As shown, the limiting auxiliary component 5 is a hexagon socket cylindrical head screw, which is inserted and connected in the vertical plug-in hole 12, and the plug-in position between the hexagon socket cylindrical head screw and the centering seat 1 is fixed by the hexagonal nut 6. The limiting auxiliary component 5 is easy to install, thereby facilitating the adjustment of the plug-in depth between the limiting auxiliary component 5 and the transverse guide groove 32.

[0037] In this specific implementation mode, Figure 1 As shown, the push piece 4 is a hexagon socket flat-end set screw, which is conveniently connected to the push-pull clamp mechanism 2 and the self-centering pin 3 respectively, and can avoid deflection when the self-centering pin 3 is inserted and connected.

[0038] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A movable centering structure for locating the inner hole of a workpiece, characterized in that: The invention comprises a centering seat (1), a push-pull clamp mechanism (2), a self-centering pin (3) and a push piece (4); the centering seat (1) is provided with a displacement slide groove (10), the self-centering pin (3) is slidably connected in the displacement slide groove (10), the self-centering pin (3) is connected to one end of the push piece (4), the other end of the push piece (4) is fixedly connected to the push-pull clamp mechanism (2), and the push-pull clamp mechanism (2) is fixedly mounted on the centering seat (1); When the push-pull clamp mechanism (2) drives the push member (4) to move laterally, the self-centering pin (3) moves laterally along the displacement slot (10), and the self-centering pin (3) is used to be fixed at the inner hole position of the positioning workpiece.

2. A movable centering structure for positioning a workpiece inner hole according to claim 1, characterized in that: The push-pull clamp mechanism (2) includes a positioning block (20) fixedly connected to the centering seat (1), a center rod (21) slidably connected in the center axis hole of the positioning block (20), one end of the center rod (21) fixedly connected to the push piece (4), and the other end fixedly connected to a slider (22), the slider (22) is connected to a limit bracket (23), the limit bracket (23) is fixedly connected to the positioning block (20), and the limit bracket (23) is hingedly connected to a handle member (24), and the handle member (24) is fixedly connected to the slider (22).

3. A movable centering structure for positioning a workpiece inner hole according to claim 2, characterized in that: The positioning block (20) is provided with an integrated plug-in block (25), the plug-in block (25) is plugged into a transverse plug-in hole (11) provided on the centering seat (1), and a locking block (26) is threadedly connected to the plug-in block (25), and the positioning block (20) is plugged and fixed on the centering seat (1) through the locking block (26).

4. A movable centering structure for positioning a workpiece inner hole according to claim 1, characterized in that: The self-centering pin (3) comprises a cylindrical displacement body (30) and a half-open cone lock body (31) of an integral structure, wherein the cylindrical displacement body (30) is used for sliding connection in the displacement slide groove (10), and the half-open cone lock body (31) is used for fixing the pin at the inner hole position of the positioning workpiece.

5. A movable centering structure for positioning a workpiece inner hole according to claim 4, characterized in that: An avoidance groove (300) and a plug-in lock groove (301) are provided at the center of the cylindrical displacement body (30); the opening direction of the avoidance groove (300) is arranged opposite to the push-pull clamp mechanism (2) and is used to avoid lateral displacement of the push member (4); and the plug-in lock groove (301) is used to be plugged and connected with the push member (4).

6. A movable centering structure for positioning a workpiece inner hole according to claim 4, characterized in that: A transverse guide groove (32) is provided on the circumferential outer wall of the cylindrical displacement body (30), and the transverse guide groove (32) is used for slidingly connecting the bottom end of the limiting auxiliary component (5), and the limiting auxiliary component (5) is inserted and connected in the vertical plug hole (12) provided on the centering seat (1), wherein the insertion depth between the limiting auxiliary component (5) and the transverse guide groove (32) can be adjusted.

7. A movable centering structure for positioning a workpiece inner hole according to claim 6, characterized in that: The limiting auxiliary component (5) is a hexagon socket cylindrical head screw, which is inserted and connected in the vertical plug-in hole (12), and the plug-in position between the hexagon socket cylindrical head screw and the centering seat (1) is kept fixed by a hexagonal nut (6).

8. The movable centering structure of a fixture for positioning an inner hole of a workpiece according to claim 1, characterized in that: The push piece (4) is a hexagon socket flat-end set screw.

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