Rapid stretching and clamping mechanism and clamp

Abstract

The utility model discloses a rapid stretching clamping mechanism and a clamp. The clamping mechanism comprises a power device, the collet is connected with the power device through a connecting piece; the limiting block is integrally arranged on the outer side of the collet chuck in a sleeving manner and keeps sliding relative to the collet chuck; when the power device drives the collet to do linear motion relative to the limiting block, the collet loosens or clamps the workpiece. According to the clamping mechanism, the workpiece can be quickly clamped, the clamping mechanism is accurate in positioning and uniform in clamping force distribution, and the probability of displacement or damage of the workpiece in the machining process can be reduced, so that the production efficiency and the product yield are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of spare part clamping, especially relates to a quick stretching clamping mechanism. BACKGROUND

[0002] In the high-tech industrial field such as automation processing, assembly and precision manufacturing, the clamping technology of workpieces as the core link to ensure the smooth production process and product quality is self-evident. The traditional clamping mode, such as manual clamp, threaded clamping device, etc., although can meet the basic clamping demand to a certain extent, but has the following defects: when effectively clamping the cylindrical workpiece, the operation is complex and time-consuming, and it is difficult to adapt to the demand of high efficiency rhythm of modern automatic production line. SUMMARY

[0003] Therefore, in order to solve the above problems, on the one hand, the utility model provides a quick stretching clamping mechanism, the clamping mechanism comprises:

[0004] Power device;

[0005] Collet, which is connected with the power device through the connecting piece;

[0006] Limiting block, which is integrally sleeved on the outside of the collet and slides relative to the collet;

[0007] When the power device drives the collet to move linearly relative to the limiting block, the collet relaxes or clamps the workpiece.

[0008] Further, the collet comprises a connecting part and a clamping part, the connecting part is connected with the power device through the connecting piece, and the clamping part has a insertion hole matched with the connecting end of the workpiece;

[0009] The limiting block has a second limiting hole matched with the connecting part.

[0010] The clamping end of the spare part is matched and inserted in the collet, the collet is driven to move linearly by the power device, and under the action of the limiting block, the collet shrinks inward, and the part receives the inward pressure of the collet, so that the clamping and fixing of the spare part are realized. The structure can realize the quick clamping of the spare part, the operation is simple, and the clamping efficiency is improved.

[0011] Further, the collet is provided with a cutout penetrating through the whole clamping part and part of the connecting part along the clamping axial direction of the collet, and the cutout penetrates through the clamping part and the connecting part along the radial direction of the collet.

[0012] Further, the clamping part is made of elastic material.

[0013] Further, the diameter of the clamping part increases from one end of the connecting part along the axial direction of the connecting part.

[0014] Further, the limiting block is internally provided with a first limiting hole matched with the clamping part, and the first limiting hole is coaxial with the second limiting hole and is in communication.

[0015] The clamping part of the collet is moved along the axis direction of the limiting block into the second limiting hole, and since the outer side surface of the clamping part of the collet and the inner side surface of the first limiting hole are conical surfaces, when the collet is moved in the direction of the second limiting hole, the diameter of the clamping part section at the same position in the first limiting hole becomes larger, at this time, the clamping part is subjected to the pressure directed to the center under the limitation of the first limiting hole, and under the action of the pressure, the clamping blocks between adjacent notches are simultaneously deformed, so that the connecting end of the workpiece is accurately and uniformly clamped, and the workpiece is quickly clamped.

[0016] On the other hand, the utility model also provides a kind of fast stretching clamp, the clamp includes at least one set of clamping mechanism, and the clamp further includes mounting portion, which is hollow inside, and the power device is fixedly installed on the outer end face of mounting portion, and the limiting block is fixedly installed on the other outer end face of mounting portion.

[0017] Further, the clamp further includes a limiting ring, which is fixedly installed on the mounting portion.

[0018] By inserting the clamping part of the component into the collet, and limiting the insertion depth of the component by the limiting ring, when the collet is moved by the power device, the component can be clamped, the clamp is accurately positioned and the clamping force is uniformly distributed, which can reduce the probability of displacement or damage of the workpiece during machining, thereby improving production efficiency and product yield.

[0019] Further, the clamp further includes a fixing portion, which is sleeved on the outer side of the mounting portion, and the mounting portion and the fixing portion are kept relative rotation.

[0020] The mounting portion is rotated, so that the machining position of the component can be changed, thereby adjusting the circumferential position of the component according to actual machining requirements.

[0021] Further, an annular guide groove is formed on the surface of the fixing portion close to the limiting block, and a plurality of positioning holes are arranged at equal angles in the annular guide groove.

[0022] The clamp further includes a connecting block, one end of which is fixedly connected with the mounting portion, and the other end movably provides a positioning rod corresponding to the positioning hole, the positioning rod is inserted into the positioning hole to keep the mounting portion and the fixing portion relative fixed, and a guide wheel is arranged on the end of the positioning rod and matched with the annular guide groove.

[0023] When the mounting part is rotated, the guide wheel rolls along the annular guide groove, thereby guiding the rotation of the mounting part, and through cooperation of the guide wheel and the annular guide groove, the radial movement of the mounting part is limited, thereby improving the rotation precision of the mounting part.

[0024] The utility model has the advantages of:

[0025] The clamping end of the part is inserted into the collet, the collet is driven to move linearly by the power device, under the action of the limiting block, the collet is retracted inward, the part is pressed inward by the collet, thereby realizing the clamping and fixing of the part, the structure can realize the quick clamping of the part, is simple to operate, and improves the clamping efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structural schematic view of the clamping mechanism;

[0027] Figure 2 is Figure 1 is a structural schematic view of the collet in the clamping mechanism shown in the figure;

[0028] Figure 3 is Figure 1 is a structural schematic view of the limiting block in the clamping mechanism shown in the figure;

[0029] Figure 4 is a structural schematic view of the clamp in embodiment 2;

[0030] Figure 5 is Figure 4 is a clamping schematic view of the clamp shown in the figure;

[0031] Figure 6 is Figure 5 is another clamping schematic view of the clamp shown in the figure;

[0032] Figure 7 is a structural schematic view of the clamp in embodiment 3;

[0033] Figure 8 is Figure 7 is a sectional view of the clamp shown in the figure;

[0034] In the figure:

[0035] 100, mounting part;

[0036] 200, clamping mechanism; 210, power device; 220, connecting piece; 230, limiting block; 231, first limiting hole; 232, second limiting hole; 240, collet; 241, clamping part; 242, connecting part; 243, insertion hole; 244, cutout

[0037] 300, limiting part;

[0038] 400, workpiece; 410, limiting surface; 420, connecting end.

[0039] 500, guide wheel;

[0040] 600, fixing part; 610, annular guide groove; 620, positioning hole;

[0041] 700, connecting block;

[0042] 800, positioning rod. DETAILED DESCRIPTION

[0043] The embodiments of the present application are described in detail below with reference to the accompanying drawings, in which the same or similar elements or elements having the same or similar functions are denoted by the same reference numerals throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0044] In this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0045] As described in the background, traditional clamping methods such as manual clamps, threaded clamping devices, etc. can meet the basic clamping requirements to some extent, but have the following defects: when effectively clamping cylindrical workpieces, the operation is complex and time-consuming, and it is difficult to adapt to the demand for high efficiency of modern automatic production lines. At the same time, the traditional clamps are prone to inaccurate positioning and uneven clamping force distribution during clamping, which may cause displacement or damage of the workpiece during machining, reducing production efficiency and product yield.

[0046] Embodiment 1:

[0047] Therefore, in order to solve the above technical problems existing in the prior art, the present embodiment provides a quick stretching clamping mechanism, as shown in Figure 1 The clamping mechanism 200 includes:

[0048] a power device 210;

[0049] a collet 240, which is connected with the power device through the connecting member 220;

[0050] a limiting block 230, which is sleeved on the outside of the collet and is in opposite sliding relationship with the collet;

[0051] When the collet is linearly moved relative to the limiting block under the driving of the power device, the collet is loosened or clamped on the workpiece 400.

[0052] As shown in the drawings, Figure 2 the collet comprises a connecting portion 242 connected with the power device through the connecting member 220 and a clamping portion 241, and the clamping portion has a hole 243 matched with the connecting end 420 of the workpiece;

[0053] As shown in the drawings, Figure 3 the limiting block 230 has a second limiting hole 232 matched with the connecting portion.

[0054] In this embodiment, the clamping end of the part is inserted into the collet, and the collet is linearly moved under the driving of the power device. Under the action of the limiting block, the collet is inwardly contracted, and the part is pressed inwardly by the collet, so that the clamping and fixing of the part are realized. This structure can realize the quick clamping of the part, is simple to operate, and improves the clamping efficiency.

[0055] In addition, the clamping portion of the part may have a connecting structure, such as a thread. If the inward pressure of the collet is uneven, the connecting structure may be damaged or clamped unstably.

[0056] Therefore, in order to solve the technical problem, as shown in the drawings, Figure 2 a cutout 244 is formed in the collet and penetrates the clamping portion and the connecting portion along the clamping axial direction of the collet. The cutout penetrates the clamping portion and the connecting portion along the radial direction of the collet, and the cutouts are arranged at equal angles along the circumferential direction of the collet.

[0057] In this embodiment, a plurality of cutouts are arranged in the circumferential direction, so that the collet portions between adjacent cutouts form clamping blocks capable of elastically deforming. When the clamping blocks are deformed under the limitation of the limiting block, the cutouts can provide sufficient movement space for the clamping blocks. Meanwhile, when the clamping portion is pressed towards the center under the limitation of the first limiting hole, all the clamping blocks are inwardly contracted at the same time, so that the connecting end of the workpiece is accurately and uniformly clamped. In this way, the clamping stability of the part is improved, and the damage to the connecting structure is reduced.

[0058] In this embodiment, the clamping portion can be made of an elastic material, such as spring steel, alloy steel with elasticity, high-strength stainless steel with elasticity, etc.

[0059] In the embodiment, the diameter of the clamping portion increases from one end of the connecting portion along the axial direction of the connecting portion, i.e., the outer circumferential surface of the entire clamping portion is a conical surface.

[0060] In addition, as shown in Figure 3 The first limiting hole 231 is coaxial with the second limiting hole and is in communication with the second limiting hole.

[0061] Specifically, the collet is driven to move linearly by the power device, so that the clamping portion of the collet moves into the second limiting hole along the axial direction of the limiting block. Since the outer side surface of the clamping portion of the collet and the inner side surface of the first limiting hole are conical surfaces, when the collet moves in the direction of the second limiting hole, the diameter of the clamping portion at the same position in the first limiting hole increases. At this time, the clamping portion is subjected to a pressure directed to the center of the circle under the limitation of the first limiting hole. Under the action of the pressure, the clamping blocks between adjacent notches are deformed at the same time, so that the connecting end of the workpiece is accurately and uniformly clamped, and rapid clamping of the workpiece is achieved.

[0062] In the embodiment, the power device can be a pneumatic cylinder. The rapid on-off of the pneumatic cylinder is controlled by electricity, so as to control the pulling and stretching of the push rod. The push rod is connected to the collet through a connecting member. When the pneumatic cylinder drives the push rod to stretch, the collet is driven to move in the same direction synchronously through the connecting member. Alternatively, a hydraulic cylinder, an electric cylinder or other devices capable of driving the collet to move can be used.

[0063] Embodiment 2

[0064] The embodiment is based on the clamping mechanism provided in Embodiment 1. Here, a rapid stretching clamp is provided, as shown in Figure 4 The clamp includes at least one set of clamping mechanisms. The clamp further includes a mounting portion 100, which is hollow inside. The power device is fixedly installed on the outer end surface of the mounting portion, and the limiting block is fixedly installed on the other outer end surface of the mounting portion.

[0065] In addition, the clamp further includes a limiting ring 300, which is fixedly installed on the mounting portion.

[0066] By inserting the clamping part of the component into the collet and limiting the insertion depth of the component by the limiting ring, the component can be clamped when the collet is driven to move by the power device. The clamp is accurately positioned and has uniform clamping force distribution, which can reduce the probability of displacement or damage of the workpiece during machining, thereby improving production efficiency and product yield.

[0067] For example, when a Figure 6When the workpiece 400 is positioned and fixed, since the connecting end of the workpiece is a symmetrically arranged cylindrical connecting end 420, and threads are machined on the connecting end, in the embodiment, the clamp comprises two sets of clamping mechanisms symmetrically mounted on the mounting portion, as shown in Figure 5 As shown, the connecting end is inserted into the collet, the collet is driven to move linearly by the power device, the clamping portion is subjected to pressure directed to the center under the limitation of the limiting block, the clamping block between adjacent notches is deformed at the same time under the action of the pressure, thereby forming accurate and uniform clamping on the connecting end of the workpiece, realizing rapid clamping of the workpiece, improving the stability of the clamping of the parts, and reducing damage to the threads.

[0068] Embodiment 3

[0069] In this embodiment, the clamp is optimized based on Embodiment 2, as shown in Figure 7 , 8 The clamp further comprises a fixing portion 600, which is sleeved outside the mounting portion, and the mounting portion and the fixing portion are kept relative rotation.

[0070] The rotating mounting portion can change the machining position of the parts, thereby adjusting the circumferential position of the parts according to actual machining requirements.

[0071] In this embodiment, an annular guide groove 610 is formed on the surface of the fixing portion close to the limiting block, and a plurality of positioning holes 620 are arranged at equal angles in the annular guide groove.

[0072] The clamp further comprises a connecting block 700, one end of which is fixedly connected with the mounting portion, and the other end movably provides a positioning rod 800 corresponding to the positioning hole, the positioning rod is inserted into the positioning hole to keep the mounting portion and the fixing portion relative fixed, and a guide wheel 500 is arranged at the end of the positioning rod and cooperates with the annular guide groove.

[0073] When the mounting portion is rotated, the guide wheel rolls along the annular guide groove, thereby guiding the rotation of the mounting portion, and through the cooperation of the guide wheel and the annular guide groove, the radial movement of the mounting portion can be limited, thereby improving the rotation accuracy of the mounting portion, and by inserting the positioning rod into different positioning holes, the parts can be fixed at different circumferential positions, thereby improving the flexibility of the clamp.

[0074] In this embodiment, the positioning rod is slidingly connected with the connecting block, and the guide wheel is rotationally connected with the positioning rod.

[0075] In addition, the positioning rod can be connected with the connecting block through an elastic component (for example, a spring), and when the positioning rod is slid, the spring is stretched or compressed, and when the rotating mounting portion moves the positioning rod to a specified positioning hole, the positioning hole can be quickly inserted into the positioning hole.

[0076] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A quick-stretch clamping mechanism, characterized in that, The clamping mechanism comprises: a power device; a collet connected with the power device through a connecting member; a limiting block which is integrally sleeved on the outside of the collet and is kept in relative sliding with the collet; when the collet is linearly moved relative to the limiting block by the power device, the collet is loosened or clamped on the workpiece.

2. A rapid tension clamping mechanism according to claim 1, characterized in that The collet comprises a connecting portion and a clamping portion, the connecting portion is connected with the power device through the connecting member, and the clamping portion has a socket matched with the connecting end of the workpiece; the limiting block has a second limiting hole matched with the connecting portion.

3. A rapid tension clamping mechanism according to claim 2, wherein The collet is provided with a cutout which penetrates the clamping portion and part of the connecting portion along the clamping axis of the collet, and the cutout penetrates the clamping portion and the connecting portion along the radial direction of the collet.

4. A rapid draw clamping mechanism according to claim 3, wherein, The clamping portion is made of elastic material.

5. A rapid draw clamping mechanism according to claim 2, wherein, The diameter of the clamping portion increases along the axis of the connecting portion from one end of the connecting portion.

6. A rapid draw clamping mechanism according to claim 3, wherein, The limiting block is provided with a first limiting hole matched with part of the clamping portion, the first limiting hole is coaxial with the second limiting hole and is in communication with the second limiting hole.

7. A rapid tensile grip characterized in that, The clamp comprises at least one set of the clamping mechanism according to any one of claims 1-6, and further comprises a mounting portion which is hollow inside, the power device is fixedly installed on the outer end face of the mounting portion, and the limiting block is fixedly installed on the other outer end face of the mounting portion.

8. A rapid tensile grip as claimed in claim 7, wherein, The clamp further comprises a limiting ring which is fixedly installed on the mounting portion.

9. A rapid tensile grip as defined in claim 7, wherein The clamp further comprises a fixing portion which is sleeved on the outside of the mounting portion, and the mounting portion is kept in relative rotation with the fixing portion.

10. A rapid tensile grip as claimed in claim 9, wherein, An annular guide groove is formed on the surface of the fixing portion close to the limiting block, and a plurality of positioning holes are arranged at equal angles in the annular guide groove; The clamp further comprises a connecting block which is fixedly connected with the mounting portion at one end and movably provided with a positioning rod corresponding to the positioning hole at the other end, the mounting portion and the fixing portion are kept in relative fixation by inserting the positioning rod into the positioning hole, and a guide wheel matched with the annular guide groove is arranged at the end of the positioning rod.

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