CN219882308U - Four-claw self-centering clamp - Google Patents
Four-claw self-centering clamp Download PDFInfo
- Publication number
- CN219882308U CN219882308U CN202321341753.XU CN202321341753U CN219882308U CN 219882308 U CN219882308 U CN 219882308U CN 202321341753 U CN202321341753 U CN 202321341753U CN 219882308 U CN219882308 U CN 219882308U
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- screw rod
- screw
- groove
- centering
- clamping
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- 230000001360 synchronised effect Effects 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims 1
- 210000000078 claw Anatomy 0.000 abstract description 17
- 239000002994 raw material Substances 0.000 abstract description 14
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The utility model relates to a four-claw self-centering clamp which comprises a base, four screws and four clamping claws, wherein a central groove is formed in the base, four grooves are formed in the periphery of the central groove in a divergent mode, four intermeshing bevel gears are suspended in the central groove, the four screws are respectively matched in the grooves along the length direction, two ends of each screw are rotatably arranged in the corresponding grooves, the central shaft of each bevel gear is respectively connected with the adjacent end of the corresponding screw, and the bottoms of the four clamping claws are respectively connected with the corresponding screw in a threaded mode. When one screw rod is driven to rotate, the four clamping claws synchronously move along the axial direction of the corresponding screw rod to be close to or far away from each other, so that the structure is compact, the space is fully utilized, the size is smaller, the transmission efficiency is high and accurate, parts are fewer, the device is suitable for processing small and accurate raw materials, the clamping and centering fixing of the symmetrical raw materials can be realized through synchronous symmetrical distribution of the four clamping claws, and further accurate processing is convenient.
Description
Technical Field
The utility model relates to the technical field of medical instruments, in particular to a four-jaw self-centering clamp.
Background
The processing of medical devices, such as various fixing plates and fixing screws in orthopaedics, needs to be matched with the physiological anatomical line of a human body, and needs to be more stable and accurate processing machinery.
Disclosure of Invention
The utility model aims to solve the technical problems that: the four-jaw self-centering clamp solves the problems of low clamp precision and poor symmetry of centering clamping raw materials.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model provides a four paws are from centering anchor clamps, which comprises a base, four screw rods and four jack catch, the concave centre tank has been seted up at the planar center in base top, the extension has four recesses that diverge all around in centre tank, axial mutually perpendicular between the adjacent two of four recesses, four bevel gears have been suspended in the centre tank, intermesh between the adjacent two of four bevel gears, four screw rods cooperate in each recess along length direction respectively, rotatable setting in corresponding recess in both ends of each screw rod, four bevel gears respectively with four screw rods one-to-one, arbitrary bevel gear corresponds the cover and establishes on the one end of screw rod, the bottom of four jack catch is threaded connection respectively on the screw rod that corresponds, one end that one of them screw rod kept away from the bevel gear links to each other with the driving element transmission, when this screw rod is driven to rotate, drive four bevel gears intermeshing synchronous rotation, four screw rods rotate simultaneously, four jack catch carry out synchronous near or the rectilinear motion who keeps away from along the axial of corresponding screw rod respectively.
As a preferred embodiment, the cross section of each groove is arc, the middle part of each groove is also provided with a sinking groove for accommodating the peripheral threads of the screw rod, and two ends of each screw rod are rotatably matched on the table-boards at two ends of the groove.
As a preferred embodiment, the top outer circumferential portion of each screw rod in the length direction is beyond the top of the groove, the bottoms of the four jaws are provided with circular arc-shaped thread grooves, and the thread grooves at the bottoms of the jaws are in threaded connection with the exposed circumference of the corresponding screw rod.
As a preferred embodiment, the two sides of the bottom of each claw are respectively provided with an extension bottom edge, clamping tables are arranged between two adjacent claws on the top of the base, right-angle grooves are formed in the positions, close to the extension bottom edges, of the two sides of each clamping table, the side edges of each clamping table extend to the two sides of each claw, and the bottoms of the claws are in sliding fit in the right-angle grooves.
As a preferred embodiment, each clamping platform is connected to the base through a plurality of positioning columns, each positioning column penetrates through the base from the bottom to the top, and the extended positioning columns are connected in blind holes in corresponding positions of each clamping platform.
As a preferred embodiment, the positioning column is a positioning pin or a positioning screw.
As a preferred embodiment, each clip is connected by three positioning posts, which are dispersed in a triangle.
As a preferred embodiment, the four bevel gears are covered with a downwardly opening shell center table around and on top, with the side edges of the center table meeting the side edges of the clamping table.
As a preferred embodiment, one of the threaded rods is provided with an axial hexagonal groove at its end face remote from the bevel gear, which hexagonal groove is intended to be connected to the drive element.
The beneficial effects of the utility model are as follows: the four screws are meshed with each other through the bevel gear at the center, the transmission is more direct and effective, the screws can synchronously rotate, meanwhile, threads on the screws drive the clamping jaws to advance or retreat to lock or loosen raw materials, the structure is compact, the space is fully utilized, the size is smaller, the transmission efficiency is high and accurate, the whole appearance is smaller, parts are fewer, the processing of small and precise raw materials is suitable, the synchronous symmetrical distribution of the four clamping jaws can be realized, clamping and centering fixation of symmetrical raw materials can be realized, and further precision processing is convenient.
Drawings
The utility model is described in further detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic view of the internal structure of the present utility model;
reference numerals in fig. 1 to 4 illustrate: 1. a base; 2. a screw; 3. a claw; 4. a clamping table; 5. a center table; 6. positioning columns; 7. bevel gears; 101. a central slot; 102. a groove; 103. sinking grooves; 201. a hexagonal groove; 301. a thread groove; 302. extending the bottom edge; 401. right angle grooves.
Detailed Description
Specific embodiments of the present utility model are described in detail below with reference to the accompanying drawings.
The four-jaw self-centering clamp as shown in fig. 1-4 comprises a base 1, four screw rods 2 and four clamping jaws 3, wherein a sunken central groove 101 is formed in the center of the top plane of the base 1, four grooves 102 are formed in the periphery of the central groove 101 in a divergent mode, the adjacent two grooves 102 are mutually perpendicular to each other in the axial direction, four bevel gears 7 are suspended in the central groove 101, the adjacent two grooves 102 are mutually meshed with each other, the four screw rods 2 are respectively matched in the grooves 102 in the length direction, two ends of each screw rod 2 are rotatably arranged in the corresponding grooves 102, the four bevel gears 7 are respectively in one-to-one correspondence with the four screw rods 2, any bevel gear 7 is correspondingly sleeved on one end of each screw rod 2, the bottoms of the four clamping jaws 3 are respectively connected with the corresponding screw rods 2 in a threaded mode, one end, away from one screw rod 2 is connected with a driving element in a transmission mode, when the screw rods 2 are driven to rotate, the four bevel gears 7 are driven to mutually mesh and synchronously rotate, meanwhile, the four clamping jaws 3 respectively move along the axial directions of the corresponding screw rods 2 in a synchronous or far-away mode.
Specifically, a screw rod 2 is used as a driving part, four screw rods 2 are in transmission fit through a bevel gear 7 in the center, the four screw rods 2 can synchronously rotate, and when the screw rods 2 rotate, the four clamping claws 3 connected with the top threads are driven to synchronously move, so that the four clamping claws can be used for clamping and fixing some raw materials, such as symmetrical round or square materials, for further precision machining, and can also be used as a moving base of a four-claw chuck.
The cross section of each groove 102 is arc, the middle part of each groove 102 is also provided with a sinking groove 103 for accommodating the peripheral threads of the screw rod 2, and two ends of each screw rod 2 are rotatably matched on the table tops at two ends of the groove 102. The circular arc-shaped groove 102 is matched with the periphery of the screw rod 2, so that the screw rod 2 is convenient to install and rotate.
As shown in fig. 4, the top outer circumferential portion of each screw 2 in the length direction exceeds the top of the groove 102, the bottoms of the four claws 3 are provided with circular arc-shaped screw grooves 301, and the screw grooves 301 at the bottoms of the claws 3 are screwed on the exposed circumference of the corresponding screw 2. The structure is simple, and the replacement and the maintenance are easy.
Further, two sides of the bottom of each claw 3 are respectively provided with an extension bottom edge 302, a clamping table 4 is arranged between two adjacent claws 3 on the top of the base 1, right-angle grooves 401 are formed in the positions, close to the extension bottom edges 302, of the two sides of the bottom of each clamping table 4, the side edges of each clamping table 4 extend to the two sides of each claw 3, and the bottoms of the claws 3 are in sliding fit in the right-angle grooves 401. The clamping jaw 3 can stably move under the limit of the clamping tables 4 at two sides, and the plane at the top of the clamping table 4 can be used for bearing raw materials.
Wherein, each clamping table 4 is connected on the base 1 through a plurality of positioning columns 6, each positioning column 6 penetrates from the bottom of the base 1 to the top, and the extended positioning column 6 is connected in the blind hole at the corresponding position of each clamping table 4. The connection mode can ensure the flatness of the top surface of the clamping table 4, so that the raw material is fixed more firmly.
Further, the positioning column 6 is a positioning pin or a positioning screw. Each clamping table 4 is connected through three positioning columns 6, and the three positioning columns 6 are dispersed into a triangle. The convenient dismantlement when using the locating pin, set screw connects more firmly, and the reference column 6 of triangle-shaped distribution makes the bayonet socket 4 more firm, and the motion of jack catch 3 is also more stable like this.
Also, four bevel gears 7 are covered with a housing center table 5 with a downward opening at the periphery and top, and the side edges of the center table 5 are connected with the side edges of the clamping table 4. The center table 5 protects the bevel gear 7 while the flat surface of the top part supports the raw material.
One of the screw rods 2 is provided with an axial hexagonal groove 201 at the end surface remote from the bevel gear 7, which hexagonal groove 201 is intended to be connected to a drive element. Is connected with external power through the hexagonal groove 201, and is convenient to install.
The working process of the utility model is as follows:
according to the drawings 1-4, firstly, the outer end of a screw rod 2 as power is connected with a driving motor, then, the rotation of the motor is controlled to realize the separation of four clamping jaws 3, then, raw materials are placed at the four clamping jaws 3, the motor is operated to rotate reversely, the four clamping jaws 3 are gathered, the raw materials are fixed, then, the raw materials are processed, and finally, the motor is controlled to rotate, and the processed raw materials are taken down.
The above embodiments are merely illustrative of the principles and effects of the present utility model, and some of the applied embodiments, and are not intended to limit the utility model; it should be noted that modifications and improvements can be made by those skilled in the art without departing from the inventive concept, and these are all within the scope of the present utility model.
Claims (9)
1. The utility model provides a four paws self-centering anchor clamps, a serial communication port, including base (1), four screw rods (2) and four jack catch (3), sunken centre tank (101) have been seted up at the planar center in base (1) top, the extension has four recess (102) of diverging all around in centre tank (101), axial mutually perpendicular between four adjacent two of recess (102), the internal suspension of centre tank (101) has four bevel gears (7), intermesh between four adjacent two of bevel gears (7), four screw rods (2) are respectively along length direction cooperation in each recess (102), the rotatable setting in corresponding recess (102) in both ends of each screw rod (2), four bevel gears (7) are respectively with four screw rods (2) one-to-one, arbitrary bevel gear (7) correspond the cover and establish in the one end of screw rod (2), the bottom of four jack catch (3) is threaded connection respectively on screw rod (2) that corresponds, one end and the driving element transmission link to each other of bevel gear (7) are kept away from to one end and the screw rod (2), when this screw rod (2) are driven to rotate, drive four bevel gears (7) and simultaneously four synchronous screw rods (2) are kept away from synchronous rotation along synchronous screw rod (2) the axial synchronous motion of each other.
2. The four-jaw self-centering clamp according to claim 1, wherein the cross section of each groove (102) is arc-shaped, a sinking groove (103) for accommodating the peripheral threads of the screw rods (2) is further arranged in the middle of each groove (102), and two ends of each screw rod (2) are rotatably matched on the table surfaces at two ends of each groove (102).
3. The four-jaw self-centering fixture according to claim 1, wherein the top outer circumferential portion of each screw (2) in the length direction exceeds the top of the groove (102), the bottoms of the four jaws (3) are provided with circular arc-shaped threaded grooves (301), and the threaded grooves (301) at the bottoms of the jaws (3) are in threaded connection with the exposed circumference of the corresponding screw (2).
4. A four-jaw self-centering clamp as claimed in claim 3, characterized in that the two sides of the bottom of each jaw (3) are respectively provided with an extension bottom edge (302), a clamping table (4) is arranged between two adjacent jaws (3) on the top of the base (1), right angle grooves (401) are formed in the positions, close to the extension bottom edges (302), of the two sides of the bottom of each clamping table (4), the side edges of each clamping table (4) extend to the two sides of each jaw (3), and the bottoms of the jaws (3) are in sliding fit in the right angle grooves (401).
5. The four-jaw self-centering fixture according to claim 4, wherein each clamping table (4) is connected to the base (1) through a plurality of positioning columns (6), each positioning column (6) extends from the bottom of the base (1) to the top, and the extending positioning columns (6) are connected in blind holes at corresponding positions of each clamping table (4).
6. The four-jaw self-centering clamp as claimed in claim 5, characterized in that the positioning posts (6) are selected from the group consisting of positioning pins and positioning screws.
7. Four-jaw self-centering clamp as claimed in claim 6, characterized in that each clamping stage (4) is connected by three positioning posts (6), the three positioning posts (6) being dispersed in a triangle.
8. The four-jaw self-centering fixture as claimed in claim 4, characterized in that the four bevel gears (7) are covered with a shell center table (5) opening downwards around and on top, the side edges of the center table (5) being connected with the side edges of the clamping table (4).
9. The four-jaw self-centering jig according to claim 1, wherein an end face of one of the screw rods (2) remote from the bevel gear (7) is provided with an axial hexagonal groove (201), the hexagonal groove (201) being adapted to be connected to a driving element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321341753.XU CN219882308U (en) | 2023-05-30 | 2023-05-30 | Four-claw self-centering clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321341753.XU CN219882308U (en) | 2023-05-30 | 2023-05-30 | Four-claw self-centering clamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219882308U true CN219882308U (en) | 2023-10-24 |
Family
ID=88395175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321341753.XU Active CN219882308U (en) | 2023-05-30 | 2023-05-30 | Four-claw self-centering clamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219882308U (en) |
-
2023
- 2023-05-30 CN CN202321341753.XU patent/CN219882308U/en active Active
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| GR01 | Patent grant | ||
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