Self-adaptive clamp

Abstract

The utility model relates to a self-adaptive clamp. The device comprises a support, a lead screw mechanism arranged on the support, a left nut and a right nut which are arranged on the lead screw mechanism, a left chuck assembly arranged on the left nut, and a right chuck assembly arranged on the right nut, the left chuck assembly and the right chuck assembly are both multi-stage semicircular movable blocks, and each multi-stage semicircular movable block is formed by nesting at least two stages of semicircular movable blocks which are graded according to the nesting relation. The movable block comprises an upper movable block, a lower movable block corresponding to the upper movable block, and a bolt and / or a positioning pin for fixedly connecting the upper movable block and the lower movable block. According to the technical scheme provided by the utility model, the multi-stage semicircular movable block is divided into the upper movable block and the lower movable block, so that the disassembly and assembly are more convenient, and a firmer sliding connection mode for facilitating installation is not needed, so that the whole mechanism works more stably and smoothly.

Description

Technical Field

[0001] The utility model belongs to the technical field of clamps and tooling in mechanical processing, and in particular relates to a self-adaptive clamp. Background Art

[0002] The clamping part of existing clamps usually has a clearance groove or a clamping fixture, and cannot adaptively change the clamping posture and clamping size. As a result, when clamping certain special-shaped parts, the clamping part cannot fit the workpiece better and the clamping may not be so firm.

[0003] Chinese patent CN114227324A discloses a wrapping fixture for special-shaped parts and its use method. It includes a base for mounting a clamp body, the right end of the base is connected with a fixed jaw by bolts, the left end of the clamp body is connected with a movable jaw by bolts, the movable jaw is connected with a slider by bolts, the slider is mounted on the lead screw by a nut sleeve, the slider and the slide groove on the base form a sliding fit, one end of the lead screw is rotatably supported on the bearing seat on the base, the other end of the lead screw is connected with the servo motor main shaft by a coupling, the servo motor is mounted on the motor seat, and the motor seat is located on the base.

[0004] In the above scheme, multiple groups of semicircular movable blocks on the fixed jaws and the movable jaws can realize the rapid clamping of cylindrical or irregular shaped parts. The multiple groups of semicircular movable blocks are installed by T-shaped slide rails and C-shaped slide grooves running through the movable blocks. This method is difficult to assemble or disassemble, especially when multiple groups need to be separated by a certain space to prevent interference, so there will inevitably be blank areas in some areas, which will affect the final clamping effect. Utility Model Content

[0005] The utility model provides an adaptive clamp, which is used to solve the problems of difficult assembly of the current clamp and incomplete clamping surface.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: the adaptive clamp comprises a support, a screw mechanism arranged on the support, a left nut and a right nut arranged on the screw mechanism, a left chuck assembly arranged on the left nut, and a right chuck assembly arranged on the right nut;

[0007] The left chuck assembly and the right chuck assembly are both multi-stage semicircular movable blocks, the plane side of the multi-stage semicircular movable block is the clamping side, the multi-stage semicircular movable block is formed by nesting at least two levels of semicircular movable blocks with graded nesting relationships, wherein the movable blocks with smaller radius are nested step by step into the movable blocks with larger radius and can slide along the arc surface relative to them, the movable blocks include an upper movable block, a lower movable block corresponding to the upper movable block, and bolts and / or positioning pins that fix the upper movable block and the lower movable block.

[0008] Optionally, the arc surface side of the movable block with a smaller radius is provided with a non-through slide groove extending along the arc surface, and the embedded surface of the movable block with a larger radius connected thereto is provided with a slider interlocking with the slide groove, and the movement of the movable block with a smaller radius relative to the movable block with a larger radius is limited by the sliding of the slider in the slide groove.

[0009] Optionally, the slide groove is provided with an upper groove on the upper edge along the axial direction, and a lower groove on the lower edge; the slider is provided with an upper protrusion matching with the upper groove on the upper edge along the axial direction, and a lower protrusion matching with the lower groove on the lower edge, and the slide groove and the slider are interlocked through the cooperation of the groove and the protrusion.

[0010] Optionally, the upper groove is located at the upper movable block with a smaller radius, the lower groove is located at the lower movable block with a smaller radius, the upper protrusion is located at the upper movable block with a larger radius, and the lower protrusion is located at the lower movable block with a larger radius.

[0011] Optionally, the curvature of the direct contact surface between the movable block with a smaller radius and the movable block with a larger radius is greater than the curvature of the slide groove.

[0012] Optionally, active blocks of the same level have the same radius.

[0013] Optionally, a left adapter assembly is provided between the left chuck assembly and the left nut, and a right adapter assembly is provided between the right chuck assembly and the right nut. The left adapter assembly and / or the right adapter assembly are two-level semicircular movable blocks. The movable block with a smaller radius in the adapter assembly is fixedly connected to the nut, and the movable block with a larger radius in the adapter assembly is fixedly connected to the movable block with the largest radius in the chuck assembly.

[0014] Optionally, a guide groove is provided on the support, a left guide block embedded in the guide groove is provided at the bottom of the left nut, and a right guide block embedded in the guide groove is provided at the bottom of the right nut.

[0015] Optionally, the screw mechanism includes a bearing arranged on a support, a screw arranged on the bearing and a handle arranged at one end of the screw, and the left nut and the right nut are threadedly connected to the screw, and when the screw rotates with the handle, the left nut and the right nut move closer to or away from each other.

[0016] Compared with the prior art, the technical solution provided by the utility model has the following advantages: the multi-stage semicircular movable block is more convenient to disassemble and assemble by being divided into an upper movable block and a lower movable block, and there is no need to avoid a more secure sliding connection method for the sake of easy installation, so that the entire mechanism works more stably and smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a specific implementation mode of the adaptive clamp of the utility model when it is working;

[0018] Figure 2 It is a cross-sectional view of a specific implementation of the adaptive clamp described in the utility model;

[0019] Figure 3 It is a cross-sectional view of a specific implementation of the left clamp assembly of the utility model;

[0020] Figure 4 yes Figure 3 A sectional view of the left clamp assembly in the direction of AA;

[0021] Figure 5 yes Figure 4 Enlarged view of middle part B;

[0022] Figure 6 It is a structural schematic diagram of a specific implementation of the left transfer assembly of the utility model;

[0023] Figure 7 yes Figure 6 A cross-sectional view of the left transfer assembly.

[0024] As shown in the figure:

[0025] 01-Workpiece;

[0026] 10-support, 20-screw mechanism, 21-bearing, 22-screw, 23-handle, 31-left nut, 32-right nut, 41-left chuck assembly, 411-first movable block, 412-second movable block, 413-third movable block, 4131-upper movable block, 4132-lower movable block, 4133-bolt, 414-slide, 4141-upper groove, 4142-lower groove, 415-slider, 4151-upper protrusion, 4152-lower protrusion, 42-right chuck assembly, 51-left transfer assembly, 511-large movable block, 512-small movable block, 513-pin, 514-through hole, 52-right transfer assembly, 61-guide groove, 62-left guide block, 63-right guide block. DETAILED DESCRIPTION

[0027] For ease of understanding, the adaptive clamp is described below in conjunction with embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation and positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] like Figure 1 and 2 As shown, the adaptive clamp includes a support 10, a screw mechanism 20 arranged on the support 10, a left nut 31 and a right nut 32 arranged on the screw mechanism 20, a left chuck assembly 41 arranged on the left nut 31, and a right chuck assembly 42 arranged on the right nut 32, a left transition assembly 51 is arranged between the left chuck assembly 41 and the left nut 31, and a right transition assembly 52 is arranged between the right chuck assembly 42 and the right nut 32.

[0031] Continue to see Figure 1 and Figure 2 The support 10 is provided with a guide groove 61 , the bottom of the left nut 31 is provided with a left guide block 62 embedded in the guide groove 61 , and the bottom of the right nut 32 is provided with a right guide block 63 embedded in the guide groove 61 .

[0032] Continue to see Figure 2 The screw mechanism 20 includes a bearing 21 arranged on the support 10, a screw 22 arranged on the bearing 21, and a handle 23 arranged at one end of the screw 22. The left nut 31 and the right nut 32 are threadedly connected to the screw 22. When the screw 22 rotates with the handle 23, the left nut 31 and the right nut 32 approach or move away from each other.

[0033] The left clamping assembly 41 and the right clamping assembly 42 are both multi-stage semicircular movable blocks, and the plane side of the multi-stage semicircular movable blocks is the clamping side. The left transfer assembly 51 and the right transfer assembly 52 are also multiple groups of semicircular movable blocks.

[0034] The multi-stage semicircular movable block is formed by nesting at least two stages of semicircular movable blocks graded according to a nesting relationship, wherein the movable blocks with smaller radius are gradually nested into the movable blocks with larger radius and can slide relative to them along the arc surface.

[0035] Figure 1 The left clamp assembly 41 and the right clamp assembly 42 are four-stage semicircular movable blocks of the same structure. Figure 3 and Figure 4 The third level semicircular movable block is a three-level semicircular movable block, and the fourth level semicircular movable block can be derived from the three-level semicircular movable block. This embodiment takes the three-level semicircular movable block as an example, which includes a first movable block 411 with the largest radius, two second movable blocks 412 embedded in the first movable block 411, and four third movable blocks 413 embedded in the second movable blocks 412. The movable blocks of the same level have the same radius.

[0036] Take a group of adjacent movable blocks nested as an example, such as a first movable block 411 and a second movable block 412, wherein the radius of the first movable block 411 is larger, and the radius of the second movable block 412 is smaller.

[0037] Continue to see Figure 3 The arc surface side of the movable block with a smaller radius, that is, the second movable block 412, is provided with a non-through slide groove 414 extending along the arc surface, and the embedded surface of the movable block with a larger radius, that is, the first movable block 411 connected thereto, is provided with a slider 415 interlocking with the slide groove 414. The movement of the movable block with a smaller radius 412 relative to the movable block with a larger radius 411 is limited by the movement area of ​​the slider 415 in the slide groove 414. In this embodiment, the slider 415 can slide within the slide groove 414 by ±30°. The arc of the direct contact surface between the movable block with a smaller radius 412 and the movable block with a larger radius 413 is larger than the arc of the slide groove 414.

[0038] like Figure 4 and 5 As shown, the upper edge of the slide groove 414 along the axial direction is provided with an upper groove 4141, and the lower edge is provided with a lower groove 4142; the upper edge of the slider 415 along the axial direction is provided with an upper protrusion 4151 that cooperates with the upper groove 4141, and the lower edge is provided with a lower protrusion 4152 that cooperates with the lower groove 4142, and the slide groove 414 and the slider 415 are interlocked through the cooperation of the groove and the protrusion.

[0039] Continue to see Figure 4, all movable blocks are respectively divided into upper and lower parts, so that the assembly of the grooves and protrusions is simpler. Taking the third movable block 413 as an example, the movable block includes an upper movable block 4131, a lower movable block 4132 corresponding to the upper movable block 4131, and a bolt 4133 that fixes the upper movable block 4131 and the lower movable block 4132. The upper groove is located in the upper movable block with a smaller radius, the lower groove is located in the lower movable block with a smaller radius, the upper protrusion is located in the upper movable block with a larger radius, and the lower protrusion is located in the lower movable block with a larger radius. In this way, the upper movable blocks are first nested, and the lower movable blocks are first nested, and then the upper and lower parts are assembled and fixed with bolts.

[0040] In this embodiment, the left transfer assembly 51 and the right transfer assembly 52 are two-stage semicircular movable blocks of the same structure, such as Figure 6 and 7 As shown, the structure of the left transfer assembly 51 is described as an example, which includes a large movable block 511 and a small movable block 512 nested in the large movable block 511. The splicing method between the two movable blocks can be referred to above and will not be repeated. The difference is that the small movable block 512 and the upper movable block and the lower movable block in the large movable block 511 are fixed by a pin 513, and the pin 513 is partially located in the upper movable block and partially located in the lower movable block. The first movable block 411 is fixed to the large movable block 511. The small movable block 512 is fixedly connected to the left nut 31 on the screw rod through a through hole 514 extending from the bottom.

[0041] Continue to see Figure 1 When the adaptive clamp is in use, the handle 23 is manually rotated, and the movement is transmitted to the left chuck assembly 41 and the right chuck assembly 42 through the screw mechanism 20. The left chuck assembly 41 and the right chuck assembly 42 begin to move inward or outward synchronously. When the movable blocks thereon encounter the workpiece 01, the semicircular movable blocks of various levels from small to large will adaptively rotate to fit the shape of the workpiece 01, thereby achieving the purpose of fitting and clamping the workpiece 01.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit them. Although the utility model has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. An adaptive clamp, characterized in that: It comprises a support, a screw mechanism arranged on the support, a left nut and a right nut arranged on the screw mechanism, a left chuck assembly arranged on the left nut, and a right chuck assembly arranged on the right nut; The left chuck assembly and the right chuck assembly are both multi-stage semicircular movable blocks, the plane side of the multi-stage semicircular movable block is the clamping side, the multi-stage semicircular movable block is formed by nesting at least two levels of semicircular movable blocks with graded nesting relationships, wherein the movable blocks with smaller radius are nested step by step into the movable blocks with larger radius and can slide along the arc surface relative to them, the movable blocks include an upper movable block, a lower movable block corresponding to the upper movable block, and bolts and / or positioning pins that fix the upper movable block and the lower movable block.

2. The adaptive clamp according to claim 1, characterized in that: The arc surface side of the movable block with a smaller radius is provided with a non-through sliding groove extending along the arc surface, and the embedded surface of the movable block with a larger radius connected thereto is provided with a sliding block interlocking with the sliding groove, and the movement of the movable block with a smaller radius relative to the movable block with a larger radius is limited by the sliding of the sliding block in the sliding groove.

3. The adaptive clamp according to claim 2, characterized in that: The upper edge of the slide groove along the axial direction is provided with an upper groove, and the lower edge is provided with a lower groove; the upper edge of the slider along the axial direction is provided with an upper protrusion that cooperates with the upper groove, and the lower edge is provided with a lower protrusion that cooperates with the lower groove. The slide groove and the slider are interlocked through the cooperation of the groove and the protrusion.

4. The adaptive clamp according to claim 3, characterized in that: The upper groove is located at the upper movable block with a smaller radius, the lower groove is located at the lower movable block with a smaller radius, the upper protrusion is located at the upper movable block with a larger radius, and the lower protrusion is located at the lower movable block with a larger radius.

5. The adaptive clamp according to claim 1, characterized in that: The curvature of the direct contact surface between the movable block with a smaller radius and the movable block with a larger radius is greater than the curvature of the slide groove.

6. The adaptive clamp according to claim 1, characterized in that: Activity blocks of the same level have the same radius.

7. The adaptive clamp according to claim 1, characterized in that: A left transfer assembly is provided between the left chuck assembly and the left nut, and a right transfer assembly is provided between the right chuck assembly and the right nut. The left transfer assembly and / or the right transfer assembly are two-level semicircular movable blocks. The movable block with a smaller radius in the transfer assembly is fixedly connected to the nut, and the movable block with a larger radius in the transfer assembly is fixedly connected to the movable block with the largest radius in the chuck assembly.

8. The adaptive clamp according to claim 1, characterized in that: The support is provided with a guide groove, the bottom of the left nut is provided with a left guide block embedded in the guide groove, and the bottom of the right nut is provided with a right guide block embedded in the guide groove.

9. The adaptive clamp according to claim 1, characterized in that: The screw mechanism includes a bearing arranged on a support, a screw arranged on the bearing and a handle arranged at one end of the screw. The left nut and the right nut are threadedly connected to the screw. When the screw rotates with the handle, the left nut and the right nut approach or move away from each other.

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