CN115740529A - Flexible three-jaw clamp - Google Patents
Flexible three-jaw clamp Download PDFInfo
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- CN115740529A CN115740529A CN202211549987.3A CN202211549987A CN115740529A CN 115740529 A CN115740529 A CN 115740529A CN 202211549987 A CN202211549987 A CN 202211549987A CN 115740529 A CN115740529 A CN 115740529A
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- insert
- pin
- jaw clamp
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Abstract
The invention discloses a flexible three-jaw clamp which comprises a connecting block (1), wherein the lower part of the connecting block (1) is connected with a body (7) through a central shaft (2), an embedding sleeve (5) is installed in the body (7), a clamping pin (4) is further installed on the body (7), and the body (7) can rotate around the embedding sleeve (5) in a micro-scale mode. The flexible three-jaw clamp provided by the invention has the advantages of few parts, simple structure, low manufacturing cost, convenience in operation and maintenance and self-adaptive adjustment, and clamping of irregular parts is realized through slight floating of the body (7) around the insert sleeve (5), so that the clamping pins (4) are driven to change the clamping position, each clamping pin (4) is in contact with the part, and the clamping and positioning are more reliable.
Description
Technical Field
The invention relates to the technical field of mechanical auxiliary machining, in particular to a flexible three-jaw clamp.
Background
The machining and clamping of thin-wall parts are one of the difficulties in the mechanical manufacturing industry, various machining methods exist on the site, but the thin-wall parts are not generally suitable for large-batch production, and the existing clamp has the defects of complex structure, high manufacturing cost, high requirement on operating skills, inconvenience in maintenance, low clamping reliability and the like. When processing castings and forging blanks with irregular shapes, the problems of clamping and processing quality are particularly obvious. When the mode that adopts traditional soft three-jaw tight excircle of clamp presss from both sides tightly, the work piece is yielding, influences the machining precision, simultaneously, because the blank appearance is irregular, presss from both sides tight location unstably, warp in order to reduce the clamping, need reduce the clamp force, nevertheless the unstable condition of clamping appears easily like this, has potential safety hazard and the condemned risk of parts machining.
Disclosure of Invention
The invention provides a flexible three-jaw clamp, which aims to solve the technical problems of irregular clamping and positioning of thin-wall parts, large part deformation, complex clamp structure, high manufacturing cost, high requirement on operating skills and inconvenient maintenance in the prior art.
In order to solve the problems, the invention adopts the technical scheme that:
the utility model provides a flexible three-jaw anchor clamps, includes the connecting block, the connecting block lower part has the body through center pin connection, install in the body 7 and inlay the cover, still install the clamp pin on the body, the body can rotate around inlaying a cover trace.
The connecting block is of an integral cuboid structure, a screw countersunk hole and a central positioning hole are formed in the thickness direction, a threaded hole is formed in the bottom of the connecting block, and the threaded hole is communicated with the central positioning hole; and the bolt is arranged in the bolt countersunk hole, and the clamp is fixed on the machine tool through the bolt.
The central shaft is of a step solid shaft structure and is provided with a first step, a second step and a third step, and the diameters of the first step, the second step and the third step are sequentially increased; the first step is connected with the central positioning hole; an embedding sleeve is arranged on the outer ring of the second step; a blind hole is formed in the second step, a cylindrical pin is mounted in the blind hole, and the blind hole is in interference fit with the cylindrical pin; the cylindrical pin is connected with the central shaft 2 and the insert sleeve together and is completely restrained; the third step is provided with a central shaft limiting surface which can limit the axial displacement of the body.
The clamping pin is of a step solid structure and is provided with a fourth step, a fifth step and a sixth step, and the clamping pin is of a structure with a large middle part and two small ends; the sixth step is in a structure with a conical ball head, and the top of the sixth step is a sharp point of a clamping pin.
The insert sleeve is of a hollow cylindrical structure, a first radial hole is formed in the side face of the insert sleeve, the diameter of the first radial hole is consistent with that of the blind hole and is in interference fit with the cylindrical pin, and the right end face of the insert sleeve is arranged on the right side of the insert sleeve.
The body is of an integral fan-shaped structure, and an embedding hole and a counter bore are formed in the center in the thickness direction; a second radial hole is formed in the radial center and communicated with the bushing hole; clamping pin mounting holes with symmetrical positions are formed in two sides of the second radial hole; the counter bore is provided with a first limiting surface; the clamping pin is arranged in the clamping pin mounting hole through a fourth step, and the fourth step is in interference fit with the clamping pin mounting hole.
The first limiting surface is flush with the right end surface of the bushing; the first limiting surface is in clearance fit with the central shaft limiting surface; the bushing holes and the bushing are in clearance fit.
The length of the bushing hole is consistent with that of the bushing, and the bushing is positioned in the bushing hole.
The body slightly floats from left to right by taking the bushing as a central shaft, and the cylindrical pin limits the floating amount of the body.
Based on the technical scheme, the following technical effects can be generated:
the three-jaw clamp provided by the invention has the advantages of small part number, simple structure, low manufacturing cost, convenience in operation and maintenance, and self-adaptive adjustment; the body passes through the center pin, inlay the cover and connect on the connecting block, the connecting block is connected with the lathe chuck, six clamp pins are fixed respectively on the body in pairs, use inlay the cover as the center pin, along with the body along with the height fluctuation of blank excircle, there is micro-floating, the floating amount has strict demand, play the tight effect of floating clamp, the pointed portion that the clamp pin took the awl pricks into the certain degree of depth in blank surface along with the effect of clamping force, do not need too big clamping force, just can realize the location of thin wall spare processing and press from both sides tightly, prevent that the work piece from warping.
Drawings
FIG. 1 is a schematic view of a flexible three-jaw clamp for clamping parts according to the present invention;
FIG. 2 isbase:Sub>A schematic view ofbase:Sub>A cut-away A-A ofbase:Sub>A flexible three-jaw clamp of the present invention;
FIG. 3 is a schematic view of a flexible three-jaw clamp of the present invention cut at B-B;
FIG. 4 is a schematic view of a connection block of a flexible three-jaw clamp of the present invention;
FIG. 5 is a schematic view of a C-C cut-away of a connecting block of a flexible three-jaw clamp of the present invention;
FIG. 6 is a schematic center axis view of a flexible three-jaw clamp of the present invention;
FIG. 7 is a schematic diagram of a bushing of a flexible three-jaw clamp of the present invention;
FIG. 8 is a schematic view of a clamping pin of a flexible three-jaw clamp of the present invention;
FIG. 9 is a schematic view of the body of a flexible three-jaw clamp of the present invention;
FIG. 10 is a schematic view of a cut-away D-D of the body of a flexible three-jaw clamp of the present invention;
figure 11 is a schematic view of a cut-away E-E of the body of a flexible three-jaw clamp of the present invention.
In the figure, 1-connecting block, 2-central shaft, 3-set screw, 4-clamping pin, 5-bushing, 6-cylindrical pin, 7-body, 8-workpiece, 9-screw counter bore, 10-center locating hole, 11-threaded hole, 12-first radial hole, 13-first step, 14-second step, 15-third step, 16-blind hole, 17-fourth step, 18-fifth step, 19-sixth step, 20-counter bore, 21-second radial hole, 22-bushing hole, 23-clamping pin mounting hole, 24-central shaft limiting surface, 25-first limiting surface, 26-bushing right end surface and 27-clamping pin sharp point.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise specifically limited, terms such as set, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention by combining the specific contents of the technical solutions.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-11, the flexible three-jaw clamp comprises a connecting block 1, wherein the lower part of the connecting block 1 is connected with a body 7 through a central shaft 2, an insert sleeve 5 is installed in the body 7, a clamping pin 4 is further installed on the body 7, and the body 7 can rotate slightly around the insert sleeve 5.
The connecting block 1 is of an integral cuboid structure, a screw counter bore 9 and a central positioning hole 10 are formed in the thickness direction, a threaded hole 11 is formed in the bottom of the connecting block, and the threaded hole 11 is communicated with the central positioning hole 10; the screw countersunk holes 9 are provided with bolts and fix the clamp on the machine tool through the bolts.
The central shaft 2 is of a step solid shaft structure and is provided with a first step 13, a second step 14 and a third step 15, and the diameters of the first step 13, the second step 14 and the third step 15 are increased in sequence; the first step 13 is connected with the central positioning hole 10; the outer ring of the second step 14 is provided with an insert sleeve 5; a blind hole 16 is formed in the second step 14, a cylindrical pin 6 is installed in the blind hole 16, and the blind hole 16 is in interference fit with the cylindrical pin 6; the cylindrical pin 6 is connected with the central shaft 2 and the insert sleeve 5 and is completely restrained; the third step 15 is provided with a central shaft limiting surface 24 which can limit the axial displacement of the body 7.
The clamping pin 4 is of a solid stepped structure and is provided with a fourth step 17, a fifth step 18 and a sixth step 19, and the clamping pin 4 is of a structure with a large middle and two small ends; the sixth step 19 is of a conical ball head structure, and the top of the sixth step is provided with a clamping pin sharp point 27.
The insert sleeve 5 is of a hollow cylindrical structure, a first radial hole 12 is formed in the side face of the insert sleeve, the diameter of the first radial hole 12 is consistent with that of the blind hole 16 and is in interference fit with the cylindrical pin 6, and the right end face 26 of the insert sleeve 5 is arranged on the right side of the insert sleeve.
The body 7 is of an integral fan-shaped structure, and an embedding hole 22 and a counter bore 20 are formed in the center in the thickness direction; a second radial hole 21 is formed in the radial center, and the second radial hole 21 is communicated with the bushing hole 22; two sides of the second radial hole 21 are provided with clamping pin mounting holes 23 with symmetrical positions; the counter bore 20 is provided with a first limiting surface 25; the clamping pin 4 is arranged in the clamping pin mounting hole 23 through the fourth step 17, and the fourth step 17 is in interference fit with the clamping pin mounting hole 23.
The first limiting surface 25 is flush with the right end surface 26 of the bushing; the first limit surface 25 is in clearance fit with the central shaft limit surface 24; the insert hole 22 is in clearance fit with the insert 5.
The length of the insert hole 22 is the same as that of the insert 5, and the insert 5 is positioned in the insert hole 22.
The body 7 slightly floats left and right by taking the insert sleeve 5 as a central shaft, and the cylindrical pin 6 limits the floating amount of the body 7.
The flexible three-jaw clamp disclosed by the invention has the following working principle:
when the surface of a cast or forged blank has a plurality of depressions, when a clamping pin point 27 is contacted with the surface of a workpiece 8 in the process that a machine tool chuck moves towards the center, the workpiece 8 can provide a reaction force for the clamping pin 4, and then the body 7 can use the bushing 5 as a central shaft, so that the body 7 generates a certain rotation angle, the position of the clamping pin point 27 is deviated, the contact point of the clamping pin point 27 and the surface of the workpiece 8 is moved to the depression position from the original position, along with the continuous clamping of the body 7, the two clamping pin points 27 are simultaneously contacted with the surface of the workpiece 8, the floating amount of the body 7 overcomes the surface defect of the workpiece, and similarly, the other two bodies 7 also move in the same way, the six clamping pin points 27 are simultaneously contacted with the excircle of the workpiece 8, and the positioning and clamping of the workpiece 8 are ensured.
The present invention has been described in detail with reference to the drawings and the embodiments, but the present invention is not limited to the above embodiments, and various changes can be made by those skilled in the art within the scope of the present invention without departing from the gist of the present invention. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (9)
1. The utility model provides a flexible three-jaw anchor clamps, its characterized in that includes connecting block (1), connecting block (1) lower part is connected with body (7) through center pin (2), install in body (7) and inlay cover (5), still install on body (7) and press from both sides tight round pin (4), body (7) can be around inlaying cover (5) micro-rotation.
2. The flexible three-jaw clamp is characterized in that the connecting block (1) is of an integral cuboid structure, a screw countersunk hole (9) and a central positioning hole (10) are formed in the thickness direction, a threaded hole (11) is formed in the bottom of the connecting block, and the threaded hole (11) is communicated with the central positioning hole (10); and bolts are arranged in the bolt countersunk holes (9) and the clamp is fixed on the machine tool through the bolts.
3. The flexible three-jaw clamp as claimed in claim 1, characterized in that the central shaft (2) is a stepped solid shaft structure provided with a first step (13), a second step (14) and a third step (15) which are sequentially increased in diameter; the first step (13) is connected with the central positioning hole (10); an embedding sleeve (5) is arranged on the outer ring of the second step (14); a blind hole (16) is formed in the second step (14), a cylindrical pin (6) is installed in the blind hole (16), and the blind hole (16) is in interference fit with the cylindrical pin (6); the cylindrical pin (6) is connected with the central shaft (2) and the insert sleeve (5) and is completely restrained; the third step (15) is provided with a central shaft limiting surface (24) which can limit the axial displacement of the body (7).
4. The flexible three-jaw clamp according to claim 1, characterized in that the clamping pin (4) is of a solid stepped structure, and is provided with a fourth step (17), a fifth step (18) and a sixth step (19), and the clamping pin (4) is of a structure with a large middle and two small ends; the sixth step (19) is of a structure with a conical ball head, and the top of the sixth step is provided with a clamping pin sharp point (27).
5. The flexible three-jaw clamp according to claim 1, characterized in that the insert (5) is a hollow cylindrical structure, the side surface of the insert is provided with a first radial hole (12), the diameter of the first radial hole (12) is consistent with that of the blind hole (16) and is in interference fit with the cylindrical pin (6), and the right end surface (26) of the insert is arranged at the right side of the insert (5).
6. The flexible three-jaw clamp as claimed in claim 1, characterized in that the body (7) is of an integral fan-shaped structure, and an embedding hole (22) and a counter bore (20) are arranged at the center in the thickness direction; a second radial hole (21) is formed in the radial center, and the second radial hole (21) is communicated with the bushing hole (22); clamping pin mounting holes (23) with symmetrical positions are formed in two sides of the second radial hole (21); the counter bore (20) is provided with a first limiting surface (25); the clamping pin (4) is installed in the clamping pin installation hole (23) through the fourth step (17), and the fourth step (17) is in interference fit with the clamping pin installation hole (23).
7. The flexible three-jaw clamp according to claim 6, characterized in that the first stop surface (25) is flush with the right insert end surface (26); the first limiting surface (25) is in clearance fit with the central shaft limiting surface (24); the bushing holes (22) are in clearance fit with the bushing (5).
8. A flexible three-jaw clamp according to claim 6, characterized in that the length of the insert hole (22) corresponds to the insert (5) and the insert (5) is located in the insert hole (22).
9. The flexible three-jaw clamp according to claim 3, characterized in that the body (7) slightly floats left and right around the insert sleeve (5) as a central shaft, and the cylindrical pin (6) limits the floating amount of the body (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211549987.3A CN115740529A (en) | 2022-12-05 | 2022-12-05 | Flexible three-jaw clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211549987.3A CN115740529A (en) | 2022-12-05 | 2022-12-05 | Flexible three-jaw clamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115740529A true CN115740529A (en) | 2023-03-07 |
Family
ID=85343310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211549987.3A Pending CN115740529A (en) | 2022-12-05 | 2022-12-05 | Flexible three-jaw clamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115740529A (en) |
-
2022
- 2022-12-05 CN CN202211549987.3A patent/CN115740529A/en active Pending
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