Collet chuck type material clamping tool

Abstract

The utility model discloses a collet formula material clamping tool, including frock seat, frock frame, rotation subassembly, collet subassembly, elastic part and collet jacking drive cylinder, the lower end of frock frame is fixed on frock seat, and the rotation subassembly is connected through the gyroscope between frock frame and rotation subassembly, rotation subassembly includes rotation cover and rotation apron, collet subassembly includes collet and collet seat, the driving force of collet jacking drive cylinder is greater than the elasticity of elastic part, and the collet subassembly is lifted through the collet jacking drive cylinder extension and makes the upper part of collet open, under the retraction state of collet jacking drive cylinder, the cavity of rotation apron is driven into the cavity of rotation apron through the elasticity of elastic part and pushes down collet seat and drives the upper part of collet to contract, and the product is clamped. The utility model drives collet subassembly to go up and opens collet through collet jacking drive cylinder, and the product can take and place material, and through the elastic part of the stable elasticity, the mouth part of collet is contracted down to collet seat, and the stable clamping of product can be realized.

Description

Technical Field

[0001] This utility model relates to the field of mechanical device technology, and in particular to a collet-type clamping tool. Background Technology

[0002] A component used in automotive steering systems consists of a top metal ball and a lower screw. The ball and screw are spot-welded together, but the weld strength, fatigue resistance, and surface finish do not meet requirements. Therefore, rolling is necessary to achieve the desired results. This necessitates a clamping fixture to hold the component in place, followed by rolling to process it. Existing technologies sometimes use collet-type fixtures to hold the component. This method typically uses a cylinder to lower the collet and tighten its opening to hold the component. However, this method suffers from inconsistent air pressure, leading to unstable clamping force that can cause component movement and affect machining accuracy. Utility Model Content

[0003] The main technical problem solved by this utility model is to provide a collet-type clamping fixture, which uses a collet lifting drive cylinder to drive the collet assembly to rise and open the collet to allow the product to be picked up and put in. In addition, the collet seat is pressed down by a spring-stable elastic element to tighten the opening of the collet, which can achieve stable clamping of the product and avoid the problem of shaking affecting the processing accuracy.

[0004] To solve the above-mentioned technical problems, the present invention provides a collet-type clamping fixture, which includes a fixture base, a fixture frame, a rotating assembly, a collet assembly, an elastic element, and a collet lifting drive cylinder. The lower end of the fixture frame is fixed on the fixture base, and the fixture frame is connected to the rotating assembly via a rotating element. The collet assembly is installed at the center of the rotating assembly, and the collet lifting drive cylinder is installed on the fixture base and can drive the collet assembly to rise.

[0005] The rotating assembly includes a rotating sleeve and a rotating cover plate. The upper part of the rotating sleeve extends radially to form a limiting boss, and the space below the limiting boss is defined as an annular cavity. The collet assembly includes a collet and a collet seat. The lower end of the collet is threadedly connected to the collet seat. The collet is inserted into the cavity at the center of the rotating cover plate and the rotating sleeve, and the upper end of the collet is hung in the cavity of the rotating cover plate. The elastic element is located in the annular cavity and its upper end abuts against the lower surface of the limiting boss, while its lower end abuts against the surface of the collet seat.

[0006] The upper part of the collet has a conical structure, and the cavity in the center of the rotating cover plate is a conical cavity; the upper end of the push rod of the collet lifting drive cylinder is not connected to the lower surface of the collet seat;

[0007] The driving force of the collet lifting drive cylinder is greater than the elastic force of the elastic element; the collet lifting drive cylinder extends to lift the collet assembly, causing the upper part of the collet to open; when the collet lifting drive cylinder is retracted, the elastic force of the elastic element pushes the collet seat downward, causing the upper part of the collet to retract back into the cavity of the rotating cover plate to clamp the product.

[0008] Furthermore, the upper part of the collet is provided with multiple axially extending strip grooves;

[0009] The groove is filled with elastic cushioning material.

[0010] Furthermore, the collet assembly also includes an anti-loosening bolt, the upper surface of which has a first locking hole that can engage with an external tool, and the bottom of the collet has a second locking hole. The lower part of the anti-loosening bolt passes through the second locking hole and is locked into the threaded hole of the collet seat.

[0011] Furthermore, the lower surface of the limiting boss of the rotating sleeve forms a limiting step, and the upper end of the collet seat is located below the limiting step, thereby achieving upper limit positioning of the collet seat through the limiting step.

[0012] To elaborate further, the rotating component is a bearing.

[0013] Furthermore, the clamping fixture also includes a pressure plate, a fixed sleeve is installed on the upper part of the fixture frame, the pressure plate is fixedly connected to the upper part of the fixed sleeve, and the rotating component is installed in the space formed by the pressure plate and the fixed sleeve.

[0014] Furthermore, a limit ring is installed on the lower end and outer circumferential surface of the rotating sleeve.

[0015] The beneficial effects of this utility model are:

[0016] This utility model has an ingenious structural design. It uses a collet lifting drive cylinder to drive the collet assembly to rise and open the collet so that the product can be picked up and put in. It also uses a spring-stable elastic element to force the collet seat downward and tighten the opening of the collet, which can achieve stable clamping of the product and will not cause the problem of shaking that affects the processing accuracy.

[0017] In this invention, the lower part of the collet is threaded into the collet seat. Considering the potential for loosening with threaded connections, an anti-loosening bolt is used to lock the bottom of the collet back into place. This double-fixing ensures the stability of the collet and collet seat, avoiding the aforementioned problem. Simultaneously, the upper surface of the anti-loosening bolt has a first locking hole, making collet replacement very convenient. An external tool can be inserted into the first locking hole and rotated in the reverse direction to remove the anti-loosening bolt. Then, an external tool can be inserted into the second locking hole and rotated in the reverse direction to remove the collet.

[0018] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is an axial sectional view of the present invention;

[0021] Figure 3 This is one of the structural schematic diagrams of the collet of this utility model;

[0022] Figure 4 This is the second schematic diagram of the structure of the collet of this utility model;

[0023] Figure 5 This is a top view of the collet of this utility model;

[0024] Figure 6 This is a structural schematic diagram of the anti-loosening bolt of this utility model;

[0025] The parts in the attached diagram are labeled as follows:

[0026] Clamping fixture 3, fixture base 31, fixture frame 32, fixed sleeve 321, rotating sleeve 331, limiting boss 3311, annular cavity 3312, limiting step 3313, rotating cover plate 332, collet 341, strip groove 3411, second locking hole 3412, collet seat 342, anti-loosening bolt 343, first locking hole 3431, elastic element 35, collet lifting drive cylinder 36, limiting ring 37, pressure plate 38, rotating part 39;

[0027] Product 10. Detailed Implementation

[0028] The following specific embodiments illustrate the detailed implementation of this utility model. Those skilled in the art can easily understand the advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented in other different ways, that is, different modifications and changes can be made without departing from the scope disclosed in this utility model.

[0029] The descriptions of positions such as up, down, left, and right in this embodiment are based on the orientation in the accompanying drawings, have no special meaning, and are not intended to limit the scope of protection of this utility model.

[0030] Example: A collet-type clamping fixture, such as Figures 1 to 6As shown, the clamping fixture 3 includes a fixture base 31, a fixture frame 32, a rotating assembly, a collet assembly, an elastic element 35, and a collet lifting drive cylinder 36. The lower end of the fixture frame is fixed on the fixture base, and the fixture frame is connected to the rotating assembly via a rotating element 39. The collet assembly is installed at the center of the rotating assembly, and the collet lifting drive cylinder is installed on the fixture base and can drive the collet assembly to rise.

[0031] The rotating assembly includes a rotating sleeve 331 and a rotating cover plate 332. The upper part of the rotating sleeve extends radially to form a limiting boss 3311, and the space below the limiting boss is defined as an annular cavity 3312. The collet assembly includes a collet 341 and a collet seat 342. The lower end of the collet is threadedly connected to the collet seat. The collet is inserted into the cavity at the center of the rotating cover plate and the rotating sleeve, and the upper end of the collet is hung in the cavity of the rotating cover plate 332. The elastic element 35 is located in the annular cavity and its upper end abuts against the lower surface of the limiting boss, and its lower end abuts against the surface of the collet seat 342.

[0032] The upper part of the collet 341 is a conical structure, and the cavity in the center of the rotating cover plate 332 is a conical cavity; the upper end of the push rod of the collet lifting drive cylinder 36 is not connected to the lower surface of the collet seat 342.

[0033] The driving force of the collet lifting drive cylinder 36 is greater than the elastic force of the elastic element 35; the collet lifting drive cylinder extends to lift the collet assembly, causing the upper part of the collet to open; when the collet lifting drive cylinder is retracted, the elastic force of the elastic element pushes the collet seat downward to cause the upper part of the collet to retract back into the cavity of the rotating cover plate to clamp the product 10.

[0034] In this embodiment, the upper part of the collet 341 is provided with a plurality of axially extending strip grooves 3411;

[0035] The groove is filled with an elastic cushioning material (not shown in the figure). This material serves to tighten the compressed and deformed collet while preventing impurities such as iron filings generated during product processing from entering the groove, scratching the product, or affecting the clamping effect.

[0036] In this embodiment, the collet assembly further includes an anti-loosening bolt 343. The upper surface of the top of the anti-loosening bolt has a first locking hole 3431 that can cooperate with an external tool. The bottom of the collet has a second locking hole 3412. The lower part of the anti-loosening bolt passes through the second locking hole and is locked in the threaded hole of the collet seat.

[0037] In this embodiment, both the first locking hole 3431 and the second locking hole 3412 are internal hexagonal holes, and the external tool is an internal hexagonal wrench.

[0038] In this embodiment, the lower part of the collet is threaded into the collet seat. Considering the potential for loosening with threaded connections, an anti-loosening bolt is used to further secure the bottom of the collet to the collet seat. This double-fixing ensures the stability of the collet and collet seat, avoiding the aforementioned problem. Simultaneously, the upper surface of the anti-loosening bolt has a first locking hole, making collet replacement very convenient. An external tool can be inserted into the first locking hole and rotated in the reverse direction to remove the anti-loosening bolt. Then, an external tool can be inserted into the second locking hole and rotated in the reverse direction to remove the collet. Therefore, this structure enables quick collet replacement while ensuring the product's stability and security after clamping, preventing any loosening issues.

[0039] In this embodiment, a limiting step 3313 is formed on the lower surface of the limiting boss 3311 of the rotating sleeve 331. The upper end of the collet seat 342 is located below the limiting step, and the upper limit of the collet seat is achieved by the limiting step. The collet lifting drive cylinder drives the collet assembly to rise until the collet seat abuts against the limiting step, indicating that the collet seat has risen to the correct position.

[0040] In this embodiment, the rotating component 39 is a bearing, ensuring the smooth rotation of the rotating assembly.

[0041] In this embodiment, the clamping fixture 3 further includes a pressure plate 38, and a fixing sleeve 321 is installed on the upper part of the fixture frame 32. The pressure plate is fixedly connected to the upper part of the fixing sleeve, and the fixing sleeve is fitted on the outer side of the rotating component. The rotating component 39 is installed in the space formed by the pressure plate and the fixing sleeve.

[0042] In this embodiment, a limit ring 37 is installed on the lower end and outer circumferential surface of the rotating sleeve.

[0043] In this embodiment, the elastic element is a spring, but it is not limited to this; it is sufficient as long as it has a stable elastic force.

[0044] The working principle and process of this utility model:

[0045] In use, the push rod of the collet lifting drive cylinder extends and presses against the bottom of the collet seat to lift it upward. During this process, the elastic element is compressed, the upper part of the collet extends out and opens, and the product is placed into the collet. Then, the push rod of the collet lifting drive cylinder retracts and separates from the collet seat. Then, the elastic element pushes the collet assembly down, and the opening of the collet closes into the cavity of the rotating cover to clamp the product.

[0046] The above description is merely an embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structure made using the contents of the present utility model specification and drawings, or directly or indirectly applied to other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A collet-type clamping fixture, characterized in that: The clamping fixture (3) includes a fixture base (31), a fixture frame (32), a rotating assembly, a collet assembly, an elastic element (35), and a collet lifting drive cylinder (36). The lower end of the fixture frame is fixed on the fixture base, and the fixture frame is connected to the rotating assembly via a rotating element (39). The collet assembly is installed at the center of the rotating assembly, and the collet lifting drive cylinder is installed on the fixture base and can drive the collet assembly to rise. The rotating assembly includes a rotating sleeve (331) and a rotating cover plate (332). The upper part of the rotating sleeve extends radially to form a limiting boss (3311), and the space below the limiting boss is defined as an annular cavity (3312). The collet assembly includes a collet (341) and a collet seat (342). The lower end of the collet is threadedly connected to the collet seat. The collet is inserted into the cavity at the center of the rotating cover plate and the rotating sleeve, and the upper end of the collet is hung in the cavity of the rotating cover plate. The elastic element is located in the annular cavity and its upper end abuts against the lower surface of the limiting boss, and its lower end abuts against the surface of the collet seat. The upper part of the collet has a conical structure, and the cavity in the center of the rotating cover plate is a conical cavity; the upper end of the push rod of the collet lifting drive cylinder is not connected to the lower surface of the collet seat; The driving force of the collet lifting drive cylinder is greater than the elastic force of the elastic element; the collet lifting drive cylinder extends to lift the collet assembly so that the upper part of the collet opens; when the collet lifting drive cylinder is retracted, the elastic force of the elastic element pushes the collet seat downward to cause the upper part of the collet to retract back into the cavity of the rotating cover plate to clamp the product (10).

2. The collet-type clamping fixture according to claim 1, characterized in that: The upper part of the collet is provided with multiple axially extending strip grooves (3411). The groove is filled with elastic cushioning material.

3. The collet-type clamping fixture according to claim 1, characterized in that: The collet assembly also includes an anti-loosening bolt (343), the upper surface of the top of the anti-loosening bolt having a first locking hole (3431) that can cooperate with an external tool, the bottom of the collet having a second locking hole (3412), and the lower part of the anti-loosening bolt passing through the second locking hole and locking into the threaded hole of the collet seat.

4. The collet-type clamping fixture according to claim 1, characterized in that: The lower surface of the limiting boss of the rotating sleeve forms a limiting step (3313), and the upper end of the collet seat is located below the limiting step, thereby achieving upper limit positioning of the collet seat through the limiting step.

5. The collet-type clamping fixture according to claim 1, characterized in that: The rotating component is a bearing.

6. The collet-type clamping fixture according to claim 1, characterized in that: The clamping fixture also includes a pressure plate (38), and a fixing sleeve (321) is installed on the upper part of the fixture frame. The pressure plate is fixedly connected to the upper part of the fixing sleeve, and the rotating component is installed in the space formed by the pressure plate and the fixing sleeve.

7. The collet-type clamping fixture according to claim 1, characterized in that: A limit ring (37) is installed on the lower end and outer circumferential surface of the rotating sleeve.

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