Thin-wall part flexible inner supporting device with cam mechanism

Abstract

The utility model discloses a thin-wall part flexible inner supporting device with a cam mechanism. The thin-wall part 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 for the thin-wall part, clamping is flexible, and deformation caused by uneven clamping force can be greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a flexible inner support device with cam mechanism and belongs to the field of thin-walled part clamping technology. BACKGROUND

[0002] The thin-walled part is prone to deformation in the machining process due to thin wall and poor rigidity. The traditional process is three-jaw inner support. The device has a small contact surface with the thin-walled part. The workpiece is deformed due to uneven local stress. After the workpiece is disassembled, it often presents a triangular deformation.

[0003] In addition, it is more difficult to clamp the thin-walled part. On the one hand, it is necessary to flexibly adjust the clamping surface according to the shape change of the workpiece. On the other hand, it is necessary to precisely clamp with low stress to facilitate reference alignment and reduce deformation. SUMMARY

[0004] The utility model aims at solving the problems of great clamping difficulty and workpiece deformation in the traditional process of clamping the thin-walled part and provides a thin-walled part flexible inner support device with a cam mechanism.

[0005] The utility model aims to realize the following technical solutions:

[0006] The utility model relates to a thin-walled part flexible inner support device with a cam mechanism, which 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 part of the support body, and a push rod vertically connected to the middle part 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 part. A push rod through hole is formed in the middle part of the horizontal support plate, and a rotating rod connecting hole is formed in the sidewall of the cylindrical support part.

[0008] The upper end of the inner support chuck is a positioning plate with a downward expanding conical positioning hole in the center. An elastic connecting cylinder is arranged below the positioning plate. An upper segment of the inner support chuck is provided with a group of radially extending and circumferentially distributed expansion notches along the central axis of the conical positioning hole.

[0009] The diameters of the two ends of the horizontal rotating rod match the diameter of the support body rotating rod connecting hole. A cam is sleeved on the middle part of the horizontal rotating rod.

[0010] The lower end of the push rod is a light rod segment matching the diameter of the support body push rod through hole. The upper end of the push rod is a conical positioning segment matching the conical positioning hole of the inner support chuck.

[0011] The lower end of the inner support chuck is fixed on the upper plate surface of the support body positioning plate by screws, the two ends of the horizontal rotating lever are rotationally connected with 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, the light rod section of the push rod is inserted into the push rod through hole of the support body, and the lower end of the push rod tightly abuts against the cam in the middle of the horizontal rotating lever; when the horizontal rotating lever rotates to the side of the cam with a thicker thickness 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 lever rotates to the side of the cam with a thinner thickness upward, the positioning plate of the inner support chuck is radially retracted under the elastic force of the elastic connecting cylinder and pushes the push rod to move downward.

[0012] The cylindrical supporting part of the support body is fixed between the base through long screws.

[0013] The two ends of the horizontal rotating lever are rotationally connected with the cylindrical supporting part of the support body through bearings.

[0014] Working process

[0015] The thin-walled cylindrical workpiece to be clamped is sleeved on the outer side of the positioning plate of the inner support chuck, the horizontal rotating lever is rotated to the side of the cam with a thicker thickness upward, the push rod is pushed upward, the conical positioning section of the push rod pushes the positioning plate of the inner support chuck to expand radially outward, and the thin-walled cylindrical workpiece is clamped and positioned; when the thin-walled cylindrical workpiece is released, the horizontal rotating lever is rotated to the side of the cam with a thinner thickness upward, the positioning plate of the inner support chuck is radially retracted under the elastic force of the elastic connecting cylinder, and the thin-walled cylindrical workpiece can be unloaded from the inner support chuck.

[0016] Beneficial effects

[0017] The thin-walled part flexible inner support device can flexibly replace the positioning plate of the inner support chuck according to the shape of the thin-walled part, has wide application, has large assembly contact surface, can greatly reduce deformation caused by uneven clamping force, can realize self-centering, can realize clamping and unloading of the workpiece only by rotating the rotating lever with the cam, is convenient to operate, and is suitable for mass production of thin-walled parts with various shapes. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic view of the thin-walled part flexible inner support device.

[0019] In the figure, 1 is an inner support chuck, 2 is a push rod, 3 is a screw, 4 is a support body, 5 is a horizontal rotating lever, 6 is a bearing, 7 is a long screw, and 8 is a base. Specific implementation

[0020] The content of the thin-walled part flexible inner support device will be further described in combination with the drawings and embodiments.

[0021] Embodiment

[0022] As Figure 1 shown, the utility model discloses a thin -walled part flexible inner support device of cam mechanism, including base 8, fixed on the upper surface of base 8 support body 4, fixed on the upper end of support body 4 inner support chuck 1, the horizontal rotation lever 5 of rotation connection in the middle part of support body 4, the push rod 2 of vertical connection in the middle part of support body 4,

[0023] The upper end of support body 4 is horizontal support plate, and the lower end of support body 4 is cylindrical support part;The middle part of horizontal support plate is provided with push rod through hole, and the sidewall of cylindrical support part is provided with rotation lever connecting hole;

[0024] The upper end of inner support chuck 1 is provided with positioning plate with downward expanding conical positioning hole in the center, and the lower side of positioning plate is provided with elastic connecting cylinder, and the upper section of inner support chuck 1 is provided with a group of expanding notches extending radially and uniformly distributed along the central axis of conical positioning hole;

[0025] The diameter of both ends of horizontal rotation lever 5 matches the diameter of rotation lever connecting hole of support body 4, and cam is sleeved on the middle part of horizontal rotation lever 5;

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

[0027] The lower end of inner support chuck 1 is fixed on the upper plate surface of positioning plate of support body 4 through screw 3, both ends of horizontal rotation lever 5 are rotationally connected with cylindrical support part of support body 4 through bearing 6, conical positioning section of push rod 2 is inserted into conical positioning hole of inner support chuck 1, light rod section of push rod 2 is inserted into push rod through hole of support body 4, and the lower end of push rod 2 tightly tops cam in the middle part of horizontal rotation lever 5;When horizontal rotation lever 5 rotates to the side of thicker cam upward, push rod 2 is lifted upward, and conical positioning section of push rod 2 pushes the positioning plate of inner support chuck 1 to expand radially outward;When horizontal rotation lever 5 rotates to the side of thinner cam upward, the positioning plate of inner support chuck 1 radially retracts under the action of elastic force of elastic connecting cylinder and pushes down push rod 2.

[0028] The cylindrical support part of support body 4 and base 8 are fixed through long screw 7.

[0029] Working process

[0030] The thin-walled cylindrical part to be clamped is sleeved on the outside of the positioning plate of the inner support chuck 1, the horizontal rotating lever 5 is rotated to the thicker side of the cam upward, the push rod 2 is pushed upward, the tapered 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 the thin-walled cylindrical part is released, the horizontal rotating lever 5 is rotated to the thinner side of the cam upward, the positioning plate of the inner support chuck 1 is radially retracted under the elastic force of the elastic connecting cylinder, and the thin-walled cylindrical part can be removed from the inner support chuck 1.

Claims

1. A flexible internal bracing device for thin-walled parts with cam mechanisms, characterized by: The base, the support body fixed on the upper surface of the base, the inner support chuck fixed on the upper end of the support body, the horizontal rotating lever connected in the middle part of the support body, and the push rod connected vertically in the middle part 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 part; the middle part of the horizontal support plate is provided with a push rod through hole, and the sidewall of the cylindrical support part is provided with a rotating lever connecting hole; The upper end of the inner support chuck is a positioning plate with a downwardly expanding conical positioning hole in the center, and the lower part of the positioning plate is provided with an elastic connecting cylinder; the upper section of the inner support chuck is provided with a group of expanding notches extending radially and distributed uniformly in the circumferential direction along the central axis of the conical positioning hole; The diameters of the two ends of the horizontal rotating lever match the diameter of the rotating lever connecting hole of the support body, and the middle part of the horizontal rotating lever is sleeved with a cam; The lower end of the push rod is a light rod section matching 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 matching the conical positioning hole of the inner support chuck; The lower end of the inner support chuck is fixed on the upper plate surface of the positioning plate of the support body by a screw, the two ends of the horizontal rotating lever are rotationally connected with the cylindrical support 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, the light rod section of the push rod is inserted into the push rod through hole of the support body, and the lower end of the push rod tightly abuts against the cam in the middle part of the horizontal rotating lever; when the horizontal rotating lever is rotated to the side with the thicker cam 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 lever is rotated to the side with the thinner cam upward, the positioning plate of the inner support chuck is radially retracted under the elastic force of the elastic connecting cylinder and pushes the push rod downward.

2. The flexible internal backing device for thin-walled parts with cam mechanism as claimed in claim 1, characterized in that: The cylindrical support part of the support body and the base are fixed by long screws.

3. The flexible internal support device for thin-walled parts with cam mechanism as claimed in claim 1, characterized in that: The two ends of the horizontal rotating lever are rotationally connected with the cylindrical support part of the support body by bearings.

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