CN220481496U - External expansion type clamping device and rotary clamp - Google Patents
External expansion type clamping device and rotary clamp Download PDFInfo
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- CN220481496U CN220481496U CN202322072264.5U CN202322072264U CN220481496U CN 220481496 U CN220481496 U CN 220481496U CN 202322072264 U CN202322072264 U CN 202322072264U CN 220481496 U CN220481496 U CN 220481496U
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- 238000001125 extrusion Methods 0.000 claims abstract description 62
- 230000000903 blocking effect Effects 0.000 claims description 7
- 230000003044 adaptive effect Effects 0.000 claims description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000000630 rising effect Effects 0.000 description 1
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Abstract
The utility model provides an external expansion type clamping device and a rotary clamp, wherein the clamping device comprises an extrusion connecting piece, an expansion sleeve and an expansion adjusting assembly.
Description
Technical Field
The utility model relates to the technical field of clamping devices, in particular to an outward-expanding clamping device and a rotary clamp with the same.
Background
When dynamic balance detection is performed on some parts (tools) with central hole sites, such as fan blades, synchronous pulleys, gears, propeller blades, vehicle hubs with tires and the like, the unbalance amount can be accurately measured only by tightly matching the central hole sites with a rotating main shaft, so that a clamping device with good stability, good repeatability and long service life for clamping hole sites is needed.
The existing clamping heads of the external expansion type clamping device are generally divided into an expansion sleeve type clamping device and an expansion block type clamping device according to the structure, wherein the expansion sleeve type clamping device is usually divided into an expansion sleeve type clamping device and an expansion block type clamping device according to the structure, a pull rod is used for driving an extrusion structure with a conical structure to carry out external expansion or release reset on the expansion sleeve, and when the expansion sleeve is in release reset, the extrusion structure is usually stretched out of the expansion sleeve, so that the structure is not very suitable for central holes of some blind hole structures, two expansion blocks or three expansion blocks are adopted for the existing clamping device in an expansion block type clamping device, external expansion or release is achieved through the conical structure penetrating through the middle of the expansion blocks, namely, the external expansion is achieved through the extrusion hole of the expansion blocks stretching into the central hole part, and the clamping precision is not ideal, and the problem that the expansion blocks are difficult to release after the expansion is achieved.
Disclosure of Invention
In view of the above, it is necessary to provide an outward-expanding type clamping device capable of improving clamping accuracy and releasing the clamping accuracy and a rotary jig having the same.
The utility model provides an external expansion type clamping device, which comprises:
the extrusion connecting piece comprises an extrusion part and a connecting rod part, wherein the extrusion part is arranged at one end of the connecting rod part, the connecting rod part is provided with a central hole, the extrusion part comprises a plurality of extrusion blocks, and the extrusion blocks are uniformly distributed at certain intervals by taking the axis of the central hole as the center;
the expansion sleeve comprises an expansion part, a force bearing part and a connecting part, wherein the force bearing part is arranged between the expansion part and the connecting part, and is sleeved on the outer side of the extrusion part, the force bearing part is provided with a force bearing arm corresponding to each extrusion block, and the expansion part is provided with an expansion block corresponding to each force bearing arm;
the tensioning adjusting assembly comprises a push rod and a limiting push block, wherein the push rod penetrates through the central hole, one end of the push rod extends out of the connecting rod portion and is connected with the limiting push block, the limiting push block is provided with a plurality of connecting arms along the radial direction of the central hole, and each connecting arm is connected with the connecting portion and is limited between two adjacent extrusion blocks.
Further, the tensioning part is provided with four tensioning blocks.
Further, the contact surface between the extrusion block and the stress arm is an adaptive cambered surface.
Further, the tensioning adjusting assembly further comprises an elastic piece and an adjusting piece, the adjusting piece is connected to one end, far away from the limiting pushing block, of the pushing rod in a position-changeable mode, and the elastic piece abuts against the position-adjustable adjusting piece and the connecting rod portion.
Further, the adjusting piece is a nut and is in threaded connection with the push rod, and one end of the nut corresponding to the elastic piece is provided with a limiting groove or a limiting protrusion.
Further, each connecting arm is provided with a supporting part corresponding to the connecting part, and the connecting arms are at least partially supported on the supporting parts.
Further, a first supporting surface is formed between the adjacent connecting arms, and each extrusion block is provided with a second supporting surface which is matched with the first supporting surface.
The utility model also provides a rotary clamp which comprises the external expansion clamping device according to any one of the schemes, a mounting disc and a belt pulley, wherein the mounting disc is connected with the outer side of the extrusion connecting piece through a bearing, and the belt pulley is connected with the extrusion connecting piece.
Further, a blocking part is arranged at one end of the connecting rod part, which is close to the extrusion part, and the blocking part is blocked between the connecting part and the mounting plate.
Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the extrusion parts with the extrusion blocks and the connecting rod parts for connecting the push rods are arranged into an integrated structure, and each connecting arm of the push block is limited between two adjacent extrusion blocks, so that when the push rods drive the push blocks to move, mutual limitation is formed between the connecting arms and the extrusion blocks, higher clamping precision is ensured, and each stress arm is arranged corresponding to each extrusion block, so that the extrusion blocks do not extend into the expansion blocks when the expansion sleeve moves along the axial direction of the connecting rod parts, but the stress arms are used for driving the expansion blocks to expand or release, so that the expansion blocks are more smoothly released.
Drawings
Fig. 1 is an overall schematic diagram of an embodiment of the clamping device of the present utility model.
Fig. 2 is a cross-sectional view of an embodiment of the clamping device of the present utility model.
FIG. 3 is a schematic view of an embodiment of the compression connector of the present utility model.
FIG. 4 is a schematic view of an embodiment of the expansion shell of the present utility model.
FIG. 5 is another angular schematic view of an embodiment of the expansion shell of the present utility model.
Fig. 6 is another angular cross-sectional view of an embodiment of the clamping device of the present utility model.
Fig. 7 is a schematic view of an embodiment of a limiting push block according to the present utility model.
Fig. 8 is a schematic view of an embodiment of a rotary clamp according to the present utility model.
Fig. 9 is a cross-sectional view of an embodiment of the rotary clamp of the present utility model.
Reference numerals illustrate:
clamping device 100, extrusion connector 10, extrusion part 11, extrusion piece 111, second abutting surface 112, connecting rod part 12, central hole 121, first spacing step surface 122, screw thread part 123, blocking part 124, second spacing step surface 125, expansion sleeve 20, expansion part 21, expansion piece 211, force receiving part 22, force receiving arm 221, connecting part 23, push rod 31, spacing push block 32, connecting arm 321, supporting part 322, first abutting surface 323, elastic element 33, adjusting element 34, spacing part 341, screw 40, rotary clamp 200, mounting plate 210, flange part 201, belt pulley 220, bearing 230, fixing ring 240, screw 250.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the utility model. The connection relationships shown in the drawings are for convenience of clarity of description only and are not limiting on the manner of connection.
It is noted that when one component is considered to be "connected" to another component, it may be directly connected to the other component, or intervening components may also be present. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. It should also be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless otherwise specifically defined and limited; either mechanically or electrically, or by communication between two components. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
It should also be noted that, in the description of the present utility model, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1-7, the present utility model provides an external expansion type clamping device 100, where the clamping device 100 includes an extrusion connector 10, an expansion sleeve 20, and an expansion adjustment assembly, and the expansion adjustment assembly is used to adjust the expansion degree of the expansion sleeve 20 or not to expand the expansion sleeve 20 in cooperation with the extrusion connector 10.
The extrusion connector 10 comprises an extrusion part 11 and a connecting rod part 12, wherein the extrusion part 11 is arranged at one end of the connecting rod part 12, the connecting rod part 12 is provided with a central hole 121, the extrusion part 11 comprises a plurality of extrusion blocks 111, and the extrusion blocks 111 are uniformly distributed at a certain distance with the central axis of the central hole 121 as a center, and are used for extrusion supporting of the tensioning degree of the tensioning sleeve 20.
The expansion sleeve 20 comprises an expansion part 21, a force bearing part 22 and a connecting part 23, wherein the force bearing part 22 is arranged between the expansion part 21 and the connecting part 23, the force bearing part 22 is sleeved on the outer side of the extrusion part 11, the force bearing part 22 is provided with a force bearing arm 221 corresponding to each extrusion block 111, the expansion part 21 is provided with an expansion block 211 corresponding to each force bearing arm 221, and the expansion degree of the expansion block 211 is changed by changing the position of the expansion block 211 relative to the corresponding extrusion block 111.
The tensioning adjustment assembly comprises a push rod 31 and a limiting push block 32, the push rod 31 is arranged in the central hole 121 in a penetrating mode, one end of the push rod 31 extends out of the connecting rod portion 12 and is connected with the limiting push block 32, a plurality of connecting arms 321 are formed on the limiting push block 32 along the radial direction of the central hole 121, each connecting arm 321 is connected with the connecting portion 23 and limited between two adjacent extrusion blocks 111 respectively, and accordingly when the tensioning sleeve 20 moves along the axial direction of the push rod 31 under the driving of the push rod 31, the connecting arms 321 of the limiting push block 32 and the extrusion blocks 111 can limit each other, and accordingly acting force between each extrusion block 111 and the corresponding stress arm 221 is stable, and high-precision support of the tensioning portion 21 is achieved.
In one embodiment, the limit pushing block 32 is screwed with the pushing rod 31.
Further, the connection portion 23 is ring-shaped, and each of the connection arms 321 is connected to the connection ring by a screw 40.
Further, each of the connecting arms 321 is provided with a supporting portion 322 corresponding to the connecting portion 23, and the connecting arms 321 are at least partially supported on the supporting portion 322. The supporting portion 322 is provided, so that the force applied when the limit pushing block 32 drives the expansion sleeve 20 to move is more stable, and unstable force caused by the force applied by the screw 40 is avoided.
In one embodiment, the tensioning part 21 has four tensioning blocks 211, four force receiving arms 221 are correspondingly arranged on the force receiving part 22, four extrusion blocks 111 are correspondingly arranged on the extrusion part 11, and the four tensioning blocks 211 are arranged to enable the tensioning part 21 to contact the inner surface of the connecting hole of the tool more uniformly and stably, so that tensioning and clamping are more stable.
In other embodiments, the tensioning portion 21 may be provided with other numbers of the tensioning blocks 211, for example, two, three, or five or more.
Further, the contact surface between the pressing block 111 and the force receiving arm 221 is an adaptive arc surface. Specifically, the contact surface of the pressing block 111 corresponding to the force receiving arm 221 is a convex arc surface, and the contact surface of the force receiving arm 221 corresponding to the pressing block 111 is a concave arc surface. Through setting to the cambered surface structure, can be further to the atress arm 221 follow the direction of extrusion piece 111 motion is spacing, thereby makes the atress arm 221 motion drive the precision is higher when rising piece 211 motion.
Further, the tension adjusting assembly further includes an elastic member 33 and an adjusting member 34, the adjusting member 34 is connected to the end of the push rod 31 away from the limiting push block 32, the elastic member 33 is abutted between the adjusting member 34 and the connecting rod portion 12, by changing the position of the adjusting member 34 on the push rod 31, the compression pressure of the elastic member 33 is changed, and under the action of the pressing portion 11, the push rod 31 is changed in position on the connecting rod portion 12 and the limiting push block 32 drives the tension sleeve 20 to change the tension degree.
In one embodiment, the adjusting member 34 is a nut and is screwed with the push rod 31, and the position adjustment of the adjusting member 34 on the push rod 31 is continuously variable by providing a threaded connection, preferably, the nut is a hand-screwed nut, so that the operator can quickly adjust the nut with bare hands.
Further, the nut is provided with a limiting portion 341 corresponding to one end of the elastic member 33, and the limiting portion 341 is a limiting groove or a limiting protrusion, and by limiting one end of the elastic member 33 in the limiting groove or sleeving the end in the limiting protrusion, the elastic member 33 is stressed more stably when the pressure applied by the adjusting member 34 is changed.
Further, a first supporting surface 323 is formed between adjacent connecting arms 321, and each pressing block 111 is formed with a second supporting surface 112 corresponding to the first supporting surface 323.
The first abutting surface 323 and the second abutting surface 112 are arranged, so that the limiting pushing blocks 32 can limit each extrusion block 111 of the extrusion part 11, and the extrusion blocks 111 are prevented from being stressed and deformed inwards to influence the tensioning effect of the tensioning sleeve 20 when the tensioning degree of the tensioning sleeve 20 is adjusted.
Referring to fig. 8-9 in combination with fig. 1-7, the present utility model further provides a rotary clamp 200, where the rotary clamp 200 includes an external expansion clamping device 100 according to any of the above schemes, and further includes a mounting plate 210 and a pulley 220, where the mounting plate 210 is connected to the outer side of the extrusion connector 10 through a bearing 230, and the pulley 220 is connected to the extrusion connector 10.
Specifically, the connecting rod portion 12 of the extrusion connector 10 is provided with a first limiting step surface 122, one side of the inner ring of the bearing 230 abuts against the first limiting step surface 122, the connecting rod portion 12 is further provided with an adaptive threaded portion 123 corresponding to the first limiting step surface 122, the threaded portion 123 is in threaded connection with a fixing ring 240, the fixing ring 240 abuts against the other side of the inner ring of the bearing 230, and the mounting plate 210 is connected to the outer ring of the bearing 230.
Further, the mounting plate 210 is provided with a flange 201, and the flange 201 is used for mounting the rotating fixture 200.
Further, the upper cover of the connecting rod 12 is provided with a second limiting step surface 125, and the belt pulley 220 is also screwed on the threaded portion 123 and is limited and fixed on the connecting rod 12 by the screw 250 and the second limiting step surface 125.
Further, an end of the elastic member 33 away from the adjusting member 34 abuts against the pulley 220.
Further, a blocking portion 124 is disposed at an end of the connecting rod portion 12 near the pressing portion 11, and the blocking portion 124 is spaced between the connecting portion 23 and the mounting plate 210, so as to prevent the expansion sleeve 20 from contacting the mounting plate 210.
In the description and claims of this application, the words "comprise/comprising" and the words "have/include" and variations thereof are used to specify the presence of stated features, values, steps, or components, but do not preclude the presence or addition of one or more other features, values, steps, components, or groups thereof.
Some features of the utility model, which are, for clarity of illustration, described in the context of separate embodiments, may also be provided in combination in a single embodiment. Conversely, some features of the utility model, which are, for brevity, described in the context of a single embodiment, may also be provided separately or in any suitable combination in different embodiments.
The foregoing description of the preferred embodiment of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (9)
1. An external expansion type clamping device, characterized in that the clamping device comprises:
the extrusion connecting piece comprises an extrusion part and a connecting rod part, wherein the extrusion part is arranged at one end of the connecting rod part, the connecting rod part is provided with a central hole, the extrusion part comprises a plurality of extrusion blocks, and the extrusion blocks are uniformly distributed at certain intervals by taking the axis of the central hole as the center;
the expansion sleeve comprises an expansion part, a force bearing part and a connecting part, wherein the force bearing part is arranged between the expansion part and the connecting part, and is sleeved on the outer side of the extrusion part, the force bearing part is provided with a force bearing arm corresponding to each extrusion block, and the expansion part is provided with an expansion block corresponding to each force bearing arm;
the tensioning adjusting assembly comprises a push rod and a limiting push block, wherein the push rod penetrates through the central hole, one end of the push rod extends out of the connecting rod portion and is connected with the limiting push block, the limiting push block is provided with a plurality of connecting arms along the radial direction of the central hole, and each connecting arm is connected with the connecting portion and is limited between two adjacent extrusion blocks.
2. An external tension clamp as recited in claim 1, wherein the tension portion has four of the tension blocks.
3. The expansion clamping device of claim 1, wherein the contact surface between the pressing block and the force-bearing arm is an adaptive cambered surface.
4. An external expansion clamping device according to claim 1, wherein the tension adjusting assembly further comprises an elastic member and an adjusting member, the adjusting member is connected to one end of the push rod away from the limit push block in a position-changeable manner, and the elastic member is abutted between the adjusting member and the connecting rod portion.
5. The device of claim 4, wherein the adjusting member is a nut and is in threaded connection with the push rod, and a limit groove or a limit protrusion is disposed at one end of the nut corresponding to the elastic member.
6. An expanding gripping device according to claim 1, wherein each of the connecting arms is provided with a support portion corresponding to the connecting portion, and the connecting arms are at least partially supported on the support portion.
7. An expanding clamping device according to claim 1, wherein a first abutting surface is formed between adjacent connecting arms, and each pressing block is formed with a second abutting surface corresponding to the first abutting surface.
8. A rotary clamp, characterized in that the rotary clamp comprises an external expansion clamping device according to any one of claims 1-7, and further comprises a mounting disc and a belt pulley, wherein the mounting disc is connected with the outer side of the extrusion connecting piece through a bearing, and the belt pulley is connected with the extrusion connecting piece.
9. The rotary clamp according to claim 8, wherein a blocking portion is provided at an end of the connecting rod portion adjacent to the pressing portion, the blocking portion being blocked between the connecting portion and the mounting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322072264.5U CN220481496U (en) | 2023-08-02 | 2023-08-02 | External expansion type clamping device and rotary clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322072264.5U CN220481496U (en) | 2023-08-02 | 2023-08-02 | External expansion type clamping device and rotary clamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220481496U true CN220481496U (en) | 2024-02-13 |
Family
ID=89833273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322072264.5U Active CN220481496U (en) | 2023-08-02 | 2023-08-02 | External expansion type clamping device and rotary clamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220481496U (en) |
-
2023
- 2023-08-02 CN CN202322072264.5U patent/CN220481496U/en active Active
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