Flexible inner supporting device for cylindrical part

Abstract

The flexible inner supporting device comprises a base, a supporting body fixed to the upper surface of the base, an inner supporting chuck fixed to the upper end of the supporting body, a horizontal rotating rod rotationally connected to the middle of the supporting body, and a push rod vertically connected to the middle of the supporting body. The horizontal rotating rod is rotated until the thicker side of the cam in the middle of the horizontal rotating rod faces upwards, the push rod is jacked upwards, and the conical positioning section of the push rod pushes the positioning plate of the inner supporting chuck to expand outwards in the radial direction, so that the thin-wall cylindrical part is clamped and positioned; when the thin-wall cylindrical part is released, the horizontal rotating rod is rotated till the thin side of the cam faces upwards, the positioning plate of the inner supporting chuck retracts in the radial direction under the elastic force effect of the elastic connecting cylinder, and the thin-wall cylindrical part can be detached from the inner supporting chuck. According to the flexible inner supporting device, clamping is flexible, and deformation caused by uneven clamping force can be greatly reduced.

Description

Technical Field

[0001] The invention relates to a flexible inner supporting device for a cylindrical part, belonging to the technical field of cylindrical part clamping. Background Art

[0002] Thin-walled parts are prone to deformation during processing due to their thin walls and poor rigidity. The traditional process is three-claw internal support, and the contact area between the device and the thin-walled parts is small. The workpiece is deformed due to uneven local force. After the workpiece is disassembled, it often presents a triangular deformation.

[0003] In addition, thin-walled parts are more difficult to clamp. On the one hand, the clamping surface must be flexibly adjusted according to the shape changes of the workpiece. On the other hand, low-stress precision clamping is required to facilitate benchmark alignment and reduce deformation. Summary of the invention

[0004] The purpose of the present invention is to solve the problems of great difficulty in clamping thin-walled parts and easy deformation of workpieces when clamping thin-walled parts in traditional processes, and to provide a flexible inner support device for cylindrical parts.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] A flexible inner support device for a cylindrical member of the present invention comprises a base, a support body fixed on the upper surface of the base, an inner support chuck fixed on the upper end of the support body, a horizontal rotating rod rotatably connected to the middle of the support body, and a push rod vertically connected to the middle of the support body;

[0007] The upper end of the support body is a horizontal support plate, and the lower end of the support body is a cylindrical support portion; a push rod passing hole is opened in the middle of the horizontal support plate, and a rotating rod connecting hole is opened on the side wall of the cylindrical support portion;

[0008] The upper end of the inner support chuck is a positioning plate with a downwardly expanding conical positioning hole in the center, and an elastic connecting tube is provided below the positioning plate. The upper section of the inner support chuck is provided with a group of radially extending and circumferentially uniformly distributed expansion notches along the central axis of the conical positioning hole;

[0009] The diameters of both ends of the horizontal rotating rod match the diameter of the connecting hole of the rotating rod of the support body, and a cam is sleeved in the middle of the horizontal rotating rod;

[0010] The lower end of the push rod is a polished rod section that matches the diameter of the push rod through hole of the support body, and the upper end of the push rod is a conical positioning section that matches the conical positioning hole of the inner support chuck;

[0011] The lower end of the inner support chuck is fixed to the upper plate surface of the support body positioning plate by screws, and the two ends of the horizontal rotating rod are rotatably connected to the cylindrical supporting part of the support body. The conical positioning section of the push rod is inserted into the conical positioning hole of the inner support chuck, and the smooth rod section of the push rod is inserted into the push rod passing hole of the support body, and the lower end of the push rod is tightly against the cam in the middle of the horizontal rotating rod; when the horizontal rotating rod is rotated to the point where the thicker side of the cam is facing upward, the push rod is pushed upward, and the conical positioning section of the push rod pushes the positioning plate of the inner support chuck to expand radially outward; when the horizontal rotating rod is rotated to the point where the thinner side of the cam is facing upward, the positioning plate of the inner support chuck radially retracts under the elastic force of the elastic connecting tube, and pushes the push rod downward.

[0012] The cylindrical supporting portion of the supporting body is fixed to the base by long screws.

[0013] The two ends of the horizontal rotating rod are rotatably connected to the cylindrical supporting part of the supporting body through bearings.

[0014] Working process

[0015] Sleeve the thin-walled cylindrical part to be clamped on the outer side of the positioning plate of the inner support chuck, rotate the horizontal rotating rod until the thicker side of the cam faces upward, push the push rod upward, and the conical positioning section of the push rod pushes the positioning plate of the inner support chuck to expand radially outward, so that the thin-walled cylindrical part is clamped and positioned; when releasing the thin-walled cylindrical part, rotate the horizontal rotating rod until the thinner side of the cam faces upward, and the positioning plate of the inner support chuck radially shrinks under the elastic force of the elastic connecting tube, and the thin-walled cylindrical part can be removed from the inner support chuck.

[0016] Beneficial Effects

[0017] The flexible internal support device of the present invention can flexibly replace the positioning plate of the internal support chuck according to the shape of the thin-walled workpiece, has a wide application range, and a large assembly contact surface, which can greatly reduce the deformation caused by uneven clamping force. At the same time, the device can achieve self-centering, and the clamping and unloading of the workpiece can be achieved only by rotating the rotating rod with a cam. It is easy to operate and is suitable for mass production of thin-walled parts of various shapes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the flexible inner support device of the present invention;

[0019] In the figure, 1-inner support chuck, 2-push rod, 3-screw, 4-support body, 5-horizontal rotating rod, 6-bearing, 7-long screw, 8-base. DETAILED DESCRIPTION

[0020] The content of the present invention is further described below in conjunction with the drawings and embodiments.

[0021] Example

[0022] like Figure 1 As shown, a flexible inner support device for a cylindrical member of the present invention comprises a base 8, a support body 4 fixed to the upper surface of the base 8, an inner support chuck 1 fixed to the upper end of the support body 4, a horizontal rotating rod 5 rotatably connected to the middle of the support body 4, and a push rod 2 vertically connected to the middle of the support body 4;

[0023] The upper end of the support body 4 is a horizontal support plate, and the lower end of the support body 4 is a cylindrical support portion; a push rod passing hole is opened in the middle of the horizontal support plate, and a rotating rod connecting hole is opened on the side wall of the cylindrical support portion;

[0024] The upper end of the inner support chuck 1 is a positioning plate with a downwardly expanding conical positioning hole in the center, and an elastic connecting tube is provided below the positioning plate. The upper section of the inner support chuck 1 is provided with a group of radially extending and circumferentially uniformly distributed expansion notches along the central axis of the conical positioning hole;

[0025] The diameters of both ends of the horizontal rotating rod 5 match the diameter of the rotating rod connecting hole of the support body 4, and a cam is sleeved in the middle of the horizontal rotating rod 5;

[0026] The lower end of the push rod 2 is a smooth rod section that matches the diameter of the push rod through hole of the support body 4, and the upper end of the push rod 2 is a conical positioning section that matches the conical positioning hole of the inner support chuck 1;

[0027] The lower end of the inner support chuck 1 is fixed to the upper plate surface of the positioning plate of the support body 4 by means of screws 3, and the two ends of the horizontal rotating rod 5 are rotatably connected with the cylindrical supporting part of the support body 4 by means of bearings 6, and the conical positioning section of the push rod 2 is inserted into the conical positioning hole of the inner support chuck 1, and the smooth rod section of the push rod 2 is inserted into the push rod passing hole of the support body 4, and the lower end of the push rod 2 is tightly pressed against the cam in the middle of the horizontal rotating rod 5; when the horizontal rotating rod 5 is rotated to the point where the thicker side of the cam is facing upward, the push rod 2 is pushed upward, and the conical positioning section of the push rod 2 pushes the positioning plate of the inner support chuck 1 to expand radially outward; when the horizontal rotating rod 5 is rotated to the point where the thinner side of the cam is facing upward, the positioning plate of the inner support chuck 1 is radially retracted under the elastic force of the elastic connecting tube, and pushes the push rod 2 downward.

[0028] The cylindrical support portion of the support body 4 is fixed to the base 8 by long screws 7 .

[0029] Working process

[0030] Sleeve the thin-walled cylindrical part to be clamped on the outer side of the positioning plate of the inner support chuck 1, rotate the horizontal rotating rod 5 until the thicker side of the cam faces upward, push the push rod 2 upward, and the conical positioning section of the push rod 2 pushes the positioning plate of the inner support chuck 1 to expand radially outward, so that the thin-walled cylindrical part is clamped and positioned; when releasing the thin-walled cylindrical part, rotate the horizontal rotating rod 5 until the thinner side of the cam faces upward, and the positioning plate of the inner support chuck 1 radially retracts under the elastic force of the elastic connecting tube, and the thin-walled cylindrical part can be removed from the inner support chuck 1.

Claims

1. A flexible inner support device for a cylindrical member, characterized in that: It includes a base, a support body fixed on the upper surface of the base, an inner support chuck fixed on the upper end of the support body, a horizontal rotating rod rotatably connected to the middle of the support body, and a push rod vertically connected to the middle of the support body; The upper end of the support body is a horizontal support plate, and the lower end of the support body is a cylindrical support portion; a push rod passing hole is opened in the middle of the horizontal support plate, and a rotating rod connecting hole is opened on the side wall of the cylindrical support portion; The upper end of the inner support chuck is a positioning plate with a downwardly expanding conical positioning hole in the center, and an elastic connecting tube is provided below the positioning plate. The upper section of the inner support chuck is provided with a group of radially extending and circumferentially uniformly distributed expansion notches along the central axis of the conical positioning hole; The diameters of both ends of the horizontal rotating rod match the diameter of the connecting hole of the rotating rod of the support body, and a cam is sleeved in the middle of the horizontal rotating rod; The lower end of the push rod is a polished rod section that matches the diameter of the push rod through hole of the support body, and the upper end of the push rod is a conical positioning section that matches the conical positioning hole of the inner support chuck; The lower end of the inner support chuck is fixed to the upper plate surface of the support body positioning plate by screws, and the two ends of the horizontal rotating rod are rotatably connected to the cylindrical supporting part of the support body. The conical positioning section of the push rod is inserted into the conical positioning hole of the inner support chuck, and the smooth rod section of the push rod is inserted into the push rod passing hole of the support body, and the lower end of the push rod is tightly against the cam in the middle of the horizontal rotating rod; when the horizontal rotating rod is rotated to the point where the thicker side of the cam is facing upward, the push rod is pushed upward, and the conical positioning section of the push rod pushes the positioning plate of the inner support chuck to expand radially outward; when the horizontal rotating rod is rotated to the point where the thinner side of the cam is facing upward, the positioning plate of the inner support chuck radially retracts under the elastic force of the elastic connecting tube, and pushes the push rod downward.

2. A flexible inner support device for a cylindrical member as claimed in claim 1, characterized in that: The cylindrical supporting portion of the supporting body is fixed to the base by long screws.

3. A flexible inner support device for a cylindrical member as claimed in claim 1, characterized in that: The two ends of the horizontal rotating rod are rotatably connected to the cylindrical supporting part of the supporting body through bearings.

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