Efficient clamping combination device for small-diameter cylindrical part

Abstract

The utility model belongs to the technical field of mechanical manufacturing and cold machining, and particularly relates to a small-diameter cylindrical part efficient clamping combination device which comprises a base, an elastic chuck, a part and a locking nut. The part is a small-diameter cylindrical part to be clamped and is installed in an installation hole in the center of the elastic chuck, and the part and the elastic chuck are installed in an inner taper hole of the base together. The inner conical surface and the inner thread of the locking nut are respectively matched and connected with the outer conical surface of the elastic chuck and the outer thread of the base; the base is fixed, when the locking nut is rotated, the locking nut moves axially, the generated external force enables the mounting hole in the center of the elastic chuck to generate elastic deformation and contract, and a part is clamped; when the part is disassembled, the locking nut is rotated in the opposite direction, the hole diameter of the mounting hole in the center of the elastic chuck is enlarged, and the part can be disassembled. The clamping mode is reliable in positioning, convenient to operate and high in operability.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of mechanical manufacturing cold working technology, and particularly relates to a small-diameter cylindrical part efficient clamping combination device. Figure 1 The combination device can conveniently realize efficient clamping of pin and shaft parts with cylindrical end face characteristics, and facilitates machining. BACKGROUND

[0002] When machining small-diameter cylindrical pin and shaft parts with end face characteristics, the main clamping method is a general fixture, a three-jaw self-centering chuck, that is, three claws are used to simultaneously shrink and clamp a workpiece from the radial direction, and the machining of a part is completed at one time. SUMMARY

[0003] (I) Technical problem to be solved

[0004] The utility model wants to solve the technical problem of how to provide a combination device capable of realizing circumferential radial clamping of small-diameter cylindrical and pin parts.

[0005] (II) Technical scheme

[0006] To solve the above technical problem, the utility model provides a small-diameter cylindrical part efficient clamping combination device, which comprises a base, an elastic chuck, a part, and a locking nut.

[0007] The part is a small-diameter cylindrical part to be clamped, which is installed in the installation hole at the center of the elastic chuck, and the two are installed together in the inner taper hole of the base.

[0008] The inner taper surface and the internal thread of the locking nut are respectively connected with the outer taper surface of the elastic chuck and the external thread of the base.

[0009] The base is fixed, when the locking nut is rotated, the locking nut is axially displaced, the external force generated causes the installation hole at the center of the elastic chuck to be elastically deformed and shrink, and the part is clamped.

[0010] When the part is disassembled, the locking nut is rotated in the opposite direction, the installation hole at the center of the elastic chuck is enlarged, and the part can be disassembled. This clamping method is reliable in positioning, convenient to operate, and has strong operability.

[0011] The combination device is connected by the inner taper hole, the outer taper surface of the elastic chuck, the central mounting hole, the outer cylindrical surface of the part, the inner taper surface of the locking nut and the inner thread.

[0012] The lower end of the base is made into a clamping part for positioning and clamping, and the clamping part is processed into a square or a cylinder with a flat lower bottom surface.

[0013] A transition cylinder, a tool withdrawal groove and a connecting external thread are arranged above the clamping part, an internal positioning taper surface is processed at the upper end, the positioning taper surface and the center of each part coincide with the center of the part, the positioning taper surface is used for cooperating with the outer taper surface of the elastic chuck, and the connecting external thread is used for cooperating with the inner thread of the locking nut.

[0014] The length of the clamping part of the base is 10-15 mm, the connecting external thread is M24, the taper angle of the positioning internal taper surface is 16°, and the total length of the base is 50-60 mm.

[0015] A larger through hole is arranged at the center of the locking nut to accommodate the mounting space of the elastic chuck, an internal thread is processed in the locking nut to correspond to the external thread of the base, and an internal taper surface is processed at the upper end of the locking nut to correspond to the external taper surface of the upper end of the elastic chuck.

[0016] Six external surfaces or evenly distributed half-open grooves are processed on the locking nut to facilitate the installation and disassembly of the locking nut thread by using a tool.

[0017] The internal thread of the locking nut is M24.

[0018] The internal taper surface of the locking nut has a taper angle of 60°.

[0019] The elastic chuck has a whole jujube kernel shape, the top and the lower part are provided with external taper surfaces, the center is provided with different regular mounting holes, the center mounting hole is used for mounting the part, and the axial through grooves are arranged on the wall surface of the elastic chuck, so that the elastic chuck can be contracted or expanded as a whole under the external force, so as to realize the change of the hole diameter of the center mounting hole.

[0020] The device is realized in the following way:

[0021] First, a base that can cooperate with the external taper surface of the elastic chuck is made, a clamping part that can be fixedly installed on the accessory of the machine tool is arranged at the lower end of the base, a square, a cylindrical or other connection is adopted, an external thread that is suitable for the locking nut is made at the upper end of the cylindrical shape of the base, and an internal taper surface that is suitable for the elastic chuck is made inside.

[0022] Second, the production of a elastic chuck shaped jujube core, top and lower are outer taper, center has can realize different rules of installation hole;

[0023] Next, the production of internal thread, inner taper and center hole with the base of the locking nut;

[0024] So, the parts are inserted into the elastic chuck center installation hole, and then put into the base inner taper, clockwise screw locking nut, locking nut taper and elastic chuck taper extrusion, the elastic chuck center installation hole shrink, that is, the parts can be clamped, counterclockwise rotation locking nut, the parts can be disassembled.

[0025] (Three) beneficial effects

[0026] Compared with the prior art, the clamping mode of the utility model is reliable in positioning, convenient to operate, and has strong operability. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 The utility model relates to the object of action: small diameter cylindrical part solid structure diagram.

[0028] Figure 2 The utility model base solid structure diagram is composed of lower end clamping part and upper end inner taper, outer thread.

[0029] Figure 3 The utility model combined device elastic chuck solid structure diagram is composed of upper and lower outer taper and center hole.

[0030] Figure 4 The utility model combined device locking nut solid structure diagram is composed of outer tightening hexahedron or open slot and inner taper, inner thread.

[0031] Figure 5 The utility model combined device working schematic diagram. DETAILED DESCRIPTION

[0032] In order to make the purpose, content and advantages of the utility model more clear, the specific implementation of the utility model is described in detail below in combination with the drawings and examples.

[0033] To solve the above technical problems, the utility model provides a kind of small diameter cylindrical part high-efficiency clamping combined device, the combined device includes: base, elastic chuck, parts and locking nut;

[0034] The part is small diameter cylindrical part to be clamped, is installed in the installation hole in the center of elastic chuck, and is installed in the inner taper hole of base together;

[0035] Locking nut inner taper, inner thread are respectively matched with the outer taper of elastic chuck and the outer thread of base and realize the connection of cooperation.

[0036] The base is fixed, when the locking nut is rotated, the locking nut is axially displaced, the external force generated causes the elastic chuck center mounting hole to be elastically deformed and contracted, and the part is clamped;

[0037] When the part is disassembled, the locking nut is rotated in the opposite direction, the elastic chuck center mounting hole diameter is increased, and the part can be disassembled. This clamping method is reliable in positioning, convenient to operate, and has strong operability.

[0038] The combination device utilizes the inner tapered hole, external thread, outer tapered surface, center mounting hole of the elastic chuck, outer cylindrical surface of the part, inner tapered surface, and inner thread of the locking nut to realize cooperation and connection.

[0039] The lower end of the base is made into a clamping part for positioning and clamping, the clamping part is processed into a square or a cylinder, and the lower bottom surface remains flat;

[0040] A transition cylinder, a tool withdrawal groove, and a connecting external thread are arranged above the clamping part, the upper end is internally processed with a positioning inner tapered surface, the positioning inner tapered surface and the center of each part coincide with the center of the part, the positioning inner tapered surface is used for cooperation with the outer tapered surface of the elastic chuck, and the connecting external thread is used for cooperation and connection with the inner thread of the locking nut.

[0041] The length of the clamping part of the base is 10-15 mm, the connecting external thread is M24, the taper angle of the positioning inner tapered surface is 16°, and the total length of the base is 50-60 mm.

[0042] The center of the locking nut is provided with a larger through hole for accommodating the installation space of the elastic chuck, an inner thread is internally processed in the locking nut for cooperation and correspondence with the external thread of the base, and an inner tapered surface is internally processed at the upper end of the locking nut for cooperation and correspondence with the outer tapered surface at the upper end of the elastic chuck.

[0043] The outer surface of the locking nut is processed with six aspects or evenly distributed half-open grooves for installing and disassembling the thread of the locking nut using tools.

[0044] The inner thread of the locking nut is M24.

[0045] The inner tapered surface of the locking nut has a taper angle of 60°.

[0046] The elastic chuck is in the shape of a jujube pit as a whole, the top and the lower part are provided with outer tapered surfaces, the center is provided with different regular mounting holes, the center mounting hole is used for mounting the part, and the axial through grooves on the wall surface of the elastic chuck allow the elastic chuck to be contracted or expanded as a whole, so that the diameter of the center mounting hole changes.

[0047] The device is realized in the following way:

[0048] First, a base that can cooperate with the outer taper surface of the elastic chuck is made. A clamping part that can be fixedly installed on the attachment of a machine tool is arranged at the lower end of the base. A square, cylindrical or other connecting means is adopted. An external thread that is adapted to the lock nut is made on the upper end of the cylindrical base. An internal taper surface that is adapted to the elastic chuck is made inside.

[0049] Second, an elastic chuck in the shape of a jujube pit is made. The top and lower part are outer taper surfaces. A central mounting hole that can realize different specifications is arranged in the center.

[0050] Then, a lock nut with an internal thread, an internal taper surface and a central hole that are adapted to the base is made.

[0051] In this way, the part is inserted into the mounting hole in the center of the elastic chuck, and then placed into the internal taper surface of the base. The lock nut is screwed clockwise. The taper surface of the lock nut and the taper surface of the elastic chuck are extruded, so that the mounting hole in the center of the elastic chuck is shrunk, and the part is clamped. The lock nut is rotated counterclockwise, and the part can be disassembled.

[0052] Example 1

[0053] This example refers to Figure 2 First, a clamping part for positioning and clamping is made at the lower end of the base. The clamping part is processed into a square or a cylinder. The lower bottom surface is kept flat. Then, a transition cylinder, a tool withdrawal groove and a connecting external thread are made above the clamping part. An internal positioning taper surface is processed in the upper end. The positioning internal taper surface and the center of each part coincide with the center of the part. The positioning internal taper surface is used to cooperate with the external taper surface of the elastic chuck. The connecting external thread is used to cooperate and connect with the internal thread of the lock nut, as shown in Figure 2 The specific requirements are as follows: the length of the clamping part is 10-15 mm. The connecting external thread is generally M24 according to the size of the part. The taper angle of the positioning internal taper surface is 16°. The total length of the base is 50-60 mm. Second, referring to Figure 3 The elastic chuck is made. The overall shape is in the shape of a jujube pit. The lower end of the external taper surface is large at the top and small at the bottom. The taper angle is 16°. A middle groove is processed on the large end of the taper surface. The groove is connected to the upper end of the external taper surface. The upper end is small and the lower end is large. The taper angle is 60°. A central through hole that is adapted to the outer cylindrical diameter of the part is processed in the center. The diameter is generally larger than the diameter of the part by 0.2-2 mm. Multiple elastic chucks of different specifications can be made according to the diameter of the part, as shown in A uniformly distributed narrow groove with a width of 1-1.2 mm is processed on the circumference of the elastic chuck. The groove is used for elastic deformation when extruded. The centers of each part and the central hole are required to coincide to ensure clamping accuracy, as shown in Figure 3 The elastic chuck is compatible with the ordinary ER chuck in the market, and has good versatility. Finally, referring toFigure 4 The locking nut is made again, a larger through hole is made in the center of the nut for accommodating the elastic chuck, an internal thread is processed inside, generally M24, for cooperating with the external thread of the base, an internal taper is processed at the upper end, the taper angle is 60°, for cooperating with the external taper of the upper end of the elastic chuck, six or evenly distributed half-open grooves are processed on the outer surface of the nut, for installing and dismounting the locking nut thread by using a tool.

[0054] The specific working process is as follows: first, the lower end of the base is fixedly installed on a machine tool accessory such as a flat-nose pliers or a chuck, second, the elastic chuck is installed in the locking nut, the upper end internal taper of the locking nut and the upper end external taper of the elastic chuck are kept in a cooperating relationship, the positions of the two are adjusted and the centers of the two are ensured to coincide. Then, the locking nut is installed in the base together with the elastic chuck, the position is adjusted and the locking nut is rotated clockwise, the lower end external taper of the elastic chuck and the positioning internal taper of the base are kept in a cooperating relationship, at the same time, the internal thread of the locking nut and the connecting external thread of the base are connected in cooperation, a part of the thread connection is enough, the locking nut, the elastic chuck and the base are kept in a free and relaxed state. Thirdly, the part is installed in the center hole of the elastic chuck, the height position is adjusted. Finally, the locking nut is rotated clockwise, the cooperating tapers of the locking nut and the elastic chuck are extruded by external force, the center hole of the elastic chuck is elastically deformed and gradually shrinks, until the part is clamped, after the processing is completed, the locking nut is rotated counterclockwise. The elastic chuck returns to a free state, the workpiece can be dismounted or replaced.

[0055] The above is only the preferred embodiment of the present application, it should be pointed out that, for those skilled in the art, without departing from the technical principles of the present application, a number of improvements and deformations can be made, these improvements and deformations should also be considered as the protection scope of the present application.

Claims

1. A high-efficiency clamping assembly for small-diameter cylindrical parts, characterized in that, The combined device comprises a base, an elastic chuck, a part and a locking nut; The part is a small-diameter cylindrical part to be clamped, which is installed in the mounting hole in the center of the elastic chuck, and both are installed in the inner tapered hole of the base; The inner tapered surface and the internal thread of the locking nut are respectively connected with the outer tapered surface of the elastic chuck and the external thread of the base; The base is fixed, and when the locking nut is rotated, the locking nut is axially displaced, and the external force generated causes the elastic deformation and shrinkage of the mounting hole in the center of the elastic chuck, and the part is clamped; When the part is disassembled, the locking nut is rotated in the opposite direction, the diameter of the mounting hole in the center of the elastic chuck is increased, and the part can be disassembled.

2. The high efficiency clamping assembly for small diameter cylindrical parts as claimed in claim 1 wherein, The combined device utilizes the inner tapered hole and the external thread on the base, the outer tapered surface and the center mounting hole of the elastic chuck, the outer cylindrical surface of the part, and the inner tapered surface and the internal thread of the locking nut to realize the connection.

3. The high efficient clamping assembly for small diameter cylindrical parts as claimed in claim 1, wherein, The lower end of the base is made into a clamping part for positioning and clamping, and the clamping part is processed into a square or a cylinder, and the lower bottom surface remains flat; A transition cylinder, a tool withdrawal groove and a connecting external thread are arranged above the clamping part, and an internal tapered surface is processed in the upper end, the internal tapered surface is coincident with the center of the part, and the internal tapered surface is used for cooperating with the outer tapered surface of the elastic chuck, and the connecting external thread is used for cooperating with the internal thread of the locking nut.

4. The high efficient clamping assembly for small diameter cylindrical parts as claimed in claim 3, wherein, The length of the clamping part of the base is 10-15 mm, the connecting external thread is M24, the internal tapered surface has a tapered angle of 16°, and the total length of the base is 50-60 mm.

5. The high efficient clamping assembly for small diameter cylindrical parts as claimed in claim 3, wherein, A large through hole is arranged in the center of the locking nut to accommodate the mounting space of the elastic chuck, an internal thread is processed in the inside of the locking nut to correspond with the external thread of the base, and an internal tapered surface is processed in the upper end of the inside of the locking nut to correspond with the outer tapered surface of the upper end of the elastic chuck.

6. The high efficient clamping assembly for small diameter cylindrical parts as claimed in claim 5, wherein, Six external threads or evenly distributed half-open grooves are processed on the outside of the locking nut to install and disassemble the threads of the locking nut using tools.

7. The high efficient clamping assembly for small diameter cylindrical parts as claimed in claim 5, wherein The internal thread of the locking nut is M24.

8. The high efficient clamping assembly for small diameter cylindrical parts as claimed in claim 5 wherein, The internal tapered surface of the locking nut has a tapered angle of 60°.

9. The high efficient clamping assembly for small diameter cylindrical parts as claimed in claim 5, wherein, The elastic chuck has a whole jujube kernel shape, the top and the lower part are provided with outer tapered surfaces, the center is provided with different regular mounting holes, and the mounting hole in the center is used for mounting the part; and the axial evenly distributed through grooves on the wall surface of the elastic chuck can make the elastic chuck shrink or expand as a whole, so that the diameter of the mounting hole in the center changes.

10. The high efficient clamping assembly for small diameter cylindrical parts as claimed in claim 9, wherein, The device is realized in the following way: First, a base that can cooperate with the outer tapered surface of the elastic chuck is made, a clamping part that can be fixedly installed on the accessory of the machine tool is arranged at the lower end of the base, and an external thread that corresponds with the locking nut is made on the upper end of the cylindrical base, and an internal tapered surface that corresponds with the elastic chuck is made inside; Second, an elastic chuck in the shape of a jujube kernel is made, the top and the lower part are outer tapered surfaces, and the center has different regular mounting holes; Then, a locking nut with an internal thread, an internal tapered surface and a center hole corresponding with the base is made. In this way, the part is inserted into the mounting hole in the center of the elastic chuck, and then is placed into the conical surface in the base, and the locking nut is screwed clockwise, the conical surface of the locking nut and the conical surface of the elastic chuck are extruded, the mounting hole in the center of the elastic chuck is shrunk, and the part is clamped. The part can be disassembled by rotating the locking nut counterclockwise.

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