CN112959239A - Automatic centering clamp - Google Patents
Automatic centering clamp Download PDFInfo
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- CN112959239A CN112959239A CN202110142847.3A CN202110142847A CN112959239A CN 112959239 A CN112959239 A CN 112959239A CN 202110142847 A CN202110142847 A CN 202110142847A CN 112959239 A CN112959239 A CN 112959239A
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- 238000000429 assembly Methods 0.000 claims 2
- 238000003754 machining Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
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Abstract
The invention belongs to the technical field of machining, and particularly relates to an automatic centering clamp. The center line of a first through groove of the automatic centering fixture is vertical to the center line of a second through groove, a first screw rod is rotatably arranged in the first through groove, and a second screw rod is rotatably arranged in the second through groove; the first clamping block is movably connected to the first screw rod through a first left-hand threaded hole and a first left-hand threaded section, and the second clamping block is movably connected to the first screw rod through a first right-hand threaded hole and a first right-hand threaded section; the third clamping block is movably connected to the second screw rod through a second left-handed threaded hole and a second left-handed threaded section, and the fourth clamping block is movably connected to the second screw rod through a second right-handed threaded hole and a second right-handed threaded section. According to the automatic centering fixture, the clamping and centering work of the rectangular workpiece can be automatically completed.
Description
Technical Field
The invention belongs to the technical field of machining, and particularly relates to an automatic centering clamp.
Background
In the field of machining technology, it is often necessary to machine parts such as holes and grooves in rectangular workpieces. In order to control the precision of parts such as holes and grooves machined on a rectangular workpiece, the rectangular workpiece needs to be centered and then precisely machined by a plane coordinate system method.
In the prior art, a clamping method of a rectangular workpiece needs a worker to clamp each side of the rectangular workpiece by using a plurality of clamps respectively, and then the centering work of the rectangular workpiece is completed by adjusting the positions of the clamps. However, the way that a plurality of independent clamps clamp and center a rectangular workpiece has the problems of inconvenient installation, low centering precision and the like.
Disclosure of Invention
The invention solves the technical problems of inconvenient installation, low centering precision and the like in clamping and centering of a rectangular workpiece in the prior art, and provides an automatic centering clamp.
In view of the above problems, an embodiment of the present invention provides an automatic centering fixture, which includes a loading device; the first screw rod, the second screw rod, the first clamping block, the second clamping block, the third clamping block, the fourth clamping block and the fixing plate; a first through groove and a second through groove are formed in the fixing plate, the center line of the first through groove is perpendicular to the center line of the second through groove, the first screw rod is rotatably installed in the first through groove, and the second screw rod is rotatably installed in the second through groove;
a first left-handed thread section and a first right-handed thread section are arranged on the first screw rod at intervals; a first left-handed thread hole matched with the first left-handed thread section is formed in the first clamping block, and a first right-handed thread hole matched with the first right-handed thread section is formed in the second clamping block; the first clamping block is movably connected to the first screw rod through the first left-hand threaded hole and the first left-hand threaded section, and the second clamping block is movably connected to the first screw rod through the first right-hand threaded hole and the first right-hand threaded section;
a second left-handed thread section and a second right-handed thread section are arranged on the second screw rod at intervals; a second left-handed thread hole matched with the second left-handed thread section is formed in the third clamping block, and a second right-handed thread hole matched with the second right-handed thread section is formed in the fourth clamping block; the third clamping block is movably connected to the second screw rod through the second left-handed thread hole and the second left-handed thread section, and the fourth clamping block is movably connected to the second screw rod through the second right-handed thread hole and the second right-handed thread section.
Optionally, the first through groove is further provided with a first opening and a second opening which are distributed at intervals, one end of the first clamping block, which is far away from the first screw rod, extends out of the first opening, and one end of the second clamping block, which is far away from the first screw rod, extends out of the second opening; the first clamping block extending out of the first opening and the second clamping block extending out of the second opening are used for clamping two opposite edges of a rectangular workpiece;
the second through groove is also provided with third openings and fourth openings which are distributed at intervals, one end of the third clamping block, which is far away from the second screw rod, extends out of the third openings, and one end of the fourth clamping block, which is far away from the second screw rod, extends out of the fourth openings; and the third clamping block extending out of the third opening and the fourth clamping block extending out of the fourth opening are used for clamping two opposite edges of the rectangular workpiece.
Optionally, the fixing plate comprises an upper plate and a lower plate; the first through groove and the second through groove are formed between the upper plate and the lower plate.
Optionally, the fixing plate further includes a positioning pin mounted on the lower plate, the upper plate further has a positioning hole, and the upper plate is positioned and mounted on the lower plate by the positioning pin inserted into the positioning hole.
Optionally, a first weight-reducing groove is formed in the surface of the upper plate facing the lower plate, and/or a second weight-reducing groove is formed in the surface of the lower plate facing the upper plate.
Optionally, the automatic centering fixture further comprises a first rotating handwheel installed at one end of the first screw rod, and a second rotating handwheel installed at one end of the second screw rod.
Optionally, the automatic centering fixture further comprises a first bearing assembly and a second bearing assembly mounted at opposite ends of the first through slot, and a third bearing assembly and a fourth bearing assembly mounted at opposite ends of the second through slot; the opposite ends of the first screw rod are respectively rotatably arranged in the first bearing assembly and the second bearing assembly; and the opposite ends of the second screw rod are respectively and rotatably arranged in the third bearing assembly and the fourth bearing assembly.
Optionally, the first bearing assembly comprises a first bearing, a first bearing seat and a first bearing cap; the first bearing seat is provided with a first mounting hole for mounting the first bearing, and the first bearing cover is mounted on the first bearing seat;
the second bearing assembly comprises a second bearing, a second bearing seat and a second bearing cover; a second mounting hole for mounting the second bearing is formed in the second bearing seat, and the second bearing cover is mounted on the second bearing seat;
the third bearing assembly comprises a third bearing, a third bearing seat and a third bearing cover; a third mounting hole for mounting the third bearing is formed in the third bearing seat, and the third bearing cover is mounted on the third bearing seat;
the fourth bearing assembly comprises a fourth bearing, a fourth bearing seat and a fourth bearing cover; and the fourth bearing seat is provided with a fourth mounting hole for mounting a fourth bearing, and the fourth bearing cover is mounted on the fourth bearing seat.
Optionally, the first clamping block comprises a first clamping jaw and a first moving block provided with the first left-handed threaded hole, the first moving block is further provided with a first convex portion, the first clamping jaw is provided with a first clamping groove, and the first moving block is mounted on the first moving block through the first convex portion clamped in the first clamping groove;
optionally, the second clamping block comprises a second clamping jaw and a second moving block provided with the first right-handed threaded hole, a second convex portion is further arranged on the second moving block, a second clamping groove is formed in the second clamping jaw, and the second moving block is mounted on the second moving block through a second convex portion clamped in the second clamping groove.
Optionally, the third clamping block comprises a third clamping jaw and a third moving block provided with the second left-handed threaded hole, the third moving block is further provided with a third convex portion, the third clamping jaw is provided with a third clamping groove, and the third moving block is mounted on the third moving block through the third convex portion clamped in the third clamping groove;
optionally, the fourth clamping block comprises a fourth clamping jaw and a fourth moving block provided with the second right-handed threaded hole, a fourth convex portion is further arranged on the fourth moving block, a fourth clamping groove is formed in the fourth clamping jaw, and the fourth moving block is mounted on the fourth moving block through a fourth convex portion clamped in the fourth clamping groove.
In the invention, a first left-handed thread section and a first right-handed thread section are arranged on a first screw rod at intervals; a first left-handed threaded hole is formed in the first clamping block, and a first right-handed threaded hole is formed in the second clamping block; the first clamping block is movably connected to the first screw rod through the first left-handed thread hole and the first left-handed thread section, and the second clamping block is movably connected to the first screw rod through the first right-handed thread hole and the first right-handed thread section; when the first screw rod is rotated, the first clamping block and the second clamping block synchronously move towards the central point of the fixing plate, the rectangular workpiece is clamped on the fixing plate along the left end and the right end, and the central point of the rectangular workpiece in the left direction and the right direction is clamped at the central point of the fixing plate. In addition, a second left-handed thread section and a second right-handed thread section are arranged on the second screw rod at intervals; a second left-handed threaded hole is formed in the third clamping block, and a second right-handed threaded hole is formed in the fourth clamping block; the third clamping block is movably connected to the second screw rod through the second left-handed thread hole and the second left-handed thread section, and the fourth clamping block is movably connected to the second screw rod through the second right-handed thread hole and the second right-handed thread section; when the second screw rod is rotated, the third clamping block and the fourth clamping block synchronously move towards the central point of the fixing plate, the rectangular workpiece is clamped on the fixing plate along the front end and the rear end, and the central point of the rectangular workpiece in the front-rear direction is clamped at the central point of the fixing plate. In addition, the first screw rod and the second screw rod are vertically arranged, so that the central point of the rectangular workpiece can be clamped at the central point of the fixing plate, and the automatic centering of the rectangular workpiece is completed; in addition, the automatic centering clamp is simple in structure, convenient to operate and low in manufacturing cost.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic structural diagram of an automatic centering fixture according to an embodiment of the present invention;
fig. 2 is an exploded view of an automatic centering fixture according to another embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a lower plate of the automatic centering fixture according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an upper plate of an automatic centering fixture according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a first jaw of the self-centering clamp according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a first fast moving of an automatic centering fixture according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a first lead screw of an automatic centering fixture according to an embodiment of the present invention.
The reference numerals in the specification are as follows:
11. a first lead screw; 111. a first left-handed thread segment; 112. a first right-handed thread segment; 12. a second lead screw; 121. a second left-handed thread segment; 122. a second right-hand thread segment; 13. a first clamping block; 131. a first left-handed threaded hole; 132. a first jaw; 1321. a first clamping groove; 133. a first moving block; 1331. a first convex portion; 14. a second clamp block; 15. a third clamping block; 16. a fourth clamping block; 17. a fixing plate; 171. a first through groove; 172 a second through slot; 173. a first opening; 174. a second opening; 175. a third opening; 176. a fourth opening; 177. an upper plate; 1771. a first weight-reducing slot; 178. a lower plate; 1781. a second weight-reducing slot; 179. positioning pins; 18. a first rotating hand wheel; 19. a second rotating hand wheel; 21. a first bearing assembly; 211. a first bearing housing; 212. a first bearing cover; 22. a second bearing assembly; 23. a third bearing assembly; 24. a fourth bearing assembly.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", "middle", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the invention, in order to better show the structure and the connection relation of the automatic centering clamp, the left direction is actually pointed to the left direction; the right direction indicated by the invention is actually directed to the right direction; the front in the invention is the actual forward pointing direction; the "rear" referred to in the present invention means to be actually directed rearward.
As shown in fig. 1 and fig. 2, an automatic centering fixture according to an embodiment of the present invention includes a first lead screw 11, a second lead screw 12, a first clamping block 13, a second clamping block 14, a third clamping block 15, a fourth clamping block 16, and a fixing plate 17; a first through groove 171 and a second through groove 172 are arranged on the fixed plate 17, the center line of the first through groove 171 is perpendicular to the center line of the second through groove 172, the first lead screw 11 is rotatably installed in the first through groove 171, and the second lead screw 12 is rotatably installed in the second through groove 172; it is to be understood that the first through groove 171 is arranged on the fixed plate 17 in the X-axis direction, the second through groove 172 is arranged on the fixed plate 17 in the Y-axis direction, and both the first through groove 171 and the second through groove 172 communicate with the upper surface of the fixed plate 17; the X direction means the left-right direction along the horizontal plane, and the Y direction means the front-back direction along the horizontal plane.
As shown in fig. 6 and 7, a first left-handed thread section 111 and a first right-handed thread section 112 are arranged on the first screw rod 11 at intervals; a first left-handed thread hole 131 matched with the first left-handed thread section 111 is formed in the first clamping block 13, and a first right-handed thread hole matched with the first right-handed thread section 112 is formed in the second clamping block 14; the first clamping block 13 is movably connected to the first screw rod 11 through the first left-handed thread hole 131 and the first left-handed thread section, and the second clamping block 14 is movably connected to the first screw rod 11 through the first right-handed thread hole and the first right-handed thread section 112; it can be understood that the upper end of the first clamping block 13 and the upper end of the second clamping block 14 both extend out of the upper surface of the fixing plate 17, the screw threads in the first left-handed thread hole 111 and the first left-handed thread hole 131 have the same rotation direction, the screw threads in the first right-handed thread hole and the first right-handed thread hole 112 have the same rotation direction, and the rotation direction of the screw threads in the first left-handed thread hole 111 is opposite to that of the screw threads in the first right-handed thread hole 112. Specifically, when the first screw rod 11 is rotated in the forward direction, the first clamping block 13 and the second clamping block 14 are close to each other and clamped on the left side and the right side of the rectangular workpiece; when the first screw rod 11 is rotated reversely, the first clamping block 13 and the second clamping block 14 are separated from each other, and the rectangular workpiece is released.
A second left-handed thread section 121 and a second right-handed thread section 122 are arranged on the second screw rod 12 at intervals; a second left-handed thread hole matched with the second left-handed thread section 121 is formed in the third clamping block 15, and a second right-handed thread hole matched with the second right-handed thread section 122 is formed in the fourth clamping block 16; the third clamping block 15 is movably connected to the second screw rod 12 through the second left-handed thread hole and the second left-handed thread section 121, and the fourth clamping block 16 is movably connected to the second screw rod 12 through the second right-handed thread hole and the second right-handed thread section 122. It can be understood that the upper end of the second clamping block 14 and the upper end of the third clamping block 15 both extend out of the upper surface of the fixing plate 17, the thread directions of the second left-handed thread section 121 and the second left-handed thread section are the same, the thread directions of the second right-handed thread section 122 and the second right-handed thread section 121 are the same, and the thread directions of the second left-handed thread section 121 and the second right-handed thread section 122 are opposite. Specifically, when the second screw rod 12 is rotated in the forward direction, the third clamping block 15 and the fourth clamping block 16 are close to each other and clamped on the front side and the rear side of the rectangular workpiece; when the second screw 12 is rotated in the reverse direction, the third clamping block 15 and the fourth clamping block 16 are separated from each other, and the rectangular workpiece is released.
In the invention, a first left-handed thread section 111 and a first right-handed thread section 112 are arranged on the first screw rod 11 at intervals; a first left-handed threaded hole 131 is formed in the first clamping block 13, and a first right-handed threaded hole is formed in the second clamping block 14; the first clamping block 13 is movably connected to the first screw rod 11 through the first left-handed thread hole 131 and the first left-handed thread section 111, and the second clamping block 14 is movably connected to the first screw rod 11 through the first right-handed thread hole and the first right-handed thread section 112; when the first screw rod is rotated, the first clamping block 13 and the second clamping block 14 synchronously move towards the central point of the fixing plate 17, the rectangular workpiece is clamped on the fixing plate 17 along the left end and the right end, and the central point of the rectangular workpiece in the left direction and the right direction is clamped on the central point of the fixing plate 17. In addition, a second left-handed thread section 121 and a second right-handed thread section 122 are arranged on the second screw rod 12 at intervals; a second left-handed threaded hole is formed in the third clamping block 15, and a second right-handed threaded hole is formed in the fourth clamping block 16; the third clamping block 15 is movably connected to the second screw rod 12 through the second left-hand threaded hole and the second left-hand threaded section 121, and the fourth clamping block 16 is movably connected to the second screw rod 12 through the second right-hand threaded hole and the second right-hand threaded section 122; when the second screw rod is rotated, the third clamping block 15 and the fourth clamping block 16 synchronously move towards the central point of the fixing plate 17, and clamp the rectangular workpiece on the fixing plate 17 along the front end and the rear end, and the central point of the rectangular workpiece in the front-rear direction is clamped at the central point of the fixing plate 17. In addition, the first lead screw 11 and the second lead screw 12 are vertically arranged, so that the central point of the rectangular workpiece can be clamped at the central point of the fixing plate 17, namely, the automatic centering work of the rectangular workpiece is completed; in addition, the automatic centering clamp is simple in structure, convenient to operate and low in manufacturing cost.
In an embodiment, as shown in fig. 1 and fig. 2, the first through slot 171 is further provided with a first opening 173 and a second opening 174 which are distributed at intervals, an end of the first clamping block 13 away from the first lead screw 11 extends from the first opening 173, and an end of the second clamping block 14 away from the first lead screw 11 extends from the second opening 174; the first clamping block 13 extending from the first opening 173 and the second clamping block 14 extending from the second opening 174 are used for clamping the left and right edges of a rectangular workpiece; it is understood that the first clamping block 13 and the second clamping block 14 clamp the rectangular workpiece at the left and right edges, i.e., along the X-axis.
The second through groove 172 is further provided with third openings 175 and fourth openings 176 which are distributed at intervals, one end of the third clamping block 15, which is far away from the second screw rod 12, extends out of the third openings 175, and one end of the fourth clamping block 16, which is far away from the second screw rod 12, extends out of the fourth openings 176; the third clamping block 15 extending from the third opening 175 and the fourth clamping block 16 extending from the fourth opening 176 are used for clamping the front and rear edges of the rectangular workpiece. It is understood that the third clamping block 15 and the fourth clamping block 16 clamp the front and back edges of the rectangular workpiece, i.e. clamp the rectangular workpiece along the Y-axis direction. In the invention, the first opening 173, the second opening 174, the third opening 175 and the fourth opening 176 are uniformly distributed along the circumferential direction of the central point of the fixing plate 17, so that the automatic clamping and centering functions of the rectangular workpiece can be completed, and the aesthetic degree of the automatic centering clamp is improved.
In one embodiment, as shown in fig. 3 and 4, the fixing plate 17 includes an upper plate 177 and a lower plate 178; the first through groove 171 and the second through groove 172 are formed between the upper plate 177 and the lower plate 178. It is to be understood that the first through grooves 171 and the second through grooves 172 may be formed by only the through grooves provided on the lower surface of the upper plate 177, or may be formed by the through grooves provided on the lower surface of the upper plate 177 and the through grooves provided on the upper surface of the lower plate 178. In the invention, the fixing plate 17 is of a segmented structure, and has simple processing and low manufacturing cost.
In one embodiment, as shown in fig. 2, the fixing plate 17 further includes a positioning pin 179 mounted on the lower plate 178, the upper plate 177 further has a positioning hole, and the upper plate 177 is positioned and mounted on the lower plate 178 by the positioning pin 179 inserted into the positioning hole. It is understood that the number of the positioning pins 179 and the positioning holes can be set according to actual requirements, for example, 2, 4, etc. are provided. The upper plate 177 can be precisely mounted on the lower plate 178 through the positioning pin 179, so that the mounting precision of the fixing plate 17 is improved, and the machining precision of the rectangular workpiece is improved.
In one embodiment, as shown in fig. 3 and 4, a first weight-reducing slot 1771 is formed in a surface of the upper plate 177 facing the lower plate 178, and/or a second weight-reducing slot 1781 is formed in a surface of the lower plate 178 facing the upper plate 177. It is understood that a plurality of the first weight-reducing slots 1771 (e.g., 2, 4, 8, etc.) may be disposed in the upper plate 177, and a plurality of the second weight-reducing slots 1781 (e.g., 2, 4, 8, etc.) may be disposed in the lower plate 178; and the first weight-reducing grooves 1771 and the second weight-reducing grooves 1781 are arranged between the upper plate 177 and the lower plate 178, so that the weight of the self-centering clamp is reduced, and the aesthetic degree of the self-centering clamp is not influenced.
In one embodiment, as shown in fig. 1 and 2, the automatic centering fixture further includes a first rotating hand wheel 18 mounted (by screwing, plugging, etc.) at one end of the first lead screw 11, and a second rotating hand wheel 19 mounted (by screwing, plugging, etc.) at one end of the second lead screw 12. It can be understood that the first screw rod 11 can be driven to rotate by the first rotating hand wheel 18, so as to drive the first clamping block 13 and the second clamping block 14 to move in the opposite direction or the reverse direction, and the second screw rod 12 can be driven to rotate by the second rotating hand wheel 19, so as to drive the third clamping block 15 and the fourth clamping block 16 to move in the opposite direction or the reverse direction. In the invention, the arrangement of the first rotating hand wheel 18 and the second rotating hand wheel 19 is convenient for a user to operate the automatic centering fixture.
Preferably, a first internal hexagonal hole is formed in the first rotating hand wheel 18, a first external hexagonal surface adapted to the first internal hexagonal hole is formed at one end of the first screw rod 11, and the first rotating hand wheel 18 is mounted on the first screw rod 11 through the first external hexagonal surface inserted into the first internal hexagonal hole; the second rotating hand wheel 19 is provided with a second inner hexagonal hole, one end of the second screw rod 12 is provided with a second outer hexagonal surface matched with the second inner hexagonal hole, and the second rotating hand wheel 19 is installed on the second screw rod 12 through inserting the second inner hexagonal hole into the second outer hexagonal surface. In the present invention, the first rotating hand wheel 18 and the second rotating hand wheel 19 are conveniently mounted and dismounted.
In one embodiment, as shown in fig. 1 and 2, the automatic centering jig further includes a first bearing assembly 21 and a second bearing assembly 22 mounted at opposite ends of the first through groove 171, and a third bearing assembly 23 and a fourth bearing assembly 24 mounted at opposite ends of the second through groove 172; the two opposite ends of the first screw rod 11 are respectively rotatably arranged in the first bearing assembly 21 and the second bearing assembly 22; the opposite ends of the second lead screw 12 are rotatably mounted in the third bearing assembly 23 and the fourth bearing assembly 24, respectively. It can be understood that the first bearing assembly 21 and the second bearing assembly 22 are respectively fixedly installed on the left and right side surfaces of the fixed plate 17, the third bearing assembly 23 and the fourth bearing assembly 24 are respectively fixedly installed on the front and rear side surfaces of the fixed plate 17, and the opposite ends of the first lead screw 11 are respectively rotatably installed in the first bearing assembly 21 and the second bearing assembly 22; opposite ends of the second screw 12 are rotatably mounted in the third bearing assembly 23 and the fourth bearing assembly 24, respectively, so that the rotational stability of the first screw 11 and the second screw 12 is ensured.
In one embodiment, as shown in fig. 2, the first bearing assembly 21 includes a first bearing, a first bearing seat 211, and a first bearing cap 212; a first mounting hole for mounting the first bearing is formed in the first bearing seat 211, and the first bearing cover 212 is mounted on the first bearing seat 211; it can be understood that a first through hole is formed on the first bearing cover 212, and one end of the first lead screw 11 passes through the first bearing and the first through hole to be connected with the first rotating handwheel 18.
The second bearing assembly 22 includes a second bearing, a second bearing seat, and a second bearing cap; a second mounting hole for mounting the second bearing is formed in the second bearing seat, and the second bearing cover is mounted on the second bearing seat; it will be appreciated that a second through hole is provided in the second bearing cover, and the other end of the first lead screw 11 extends through the second bearing into the second through hole.
The third bearing assembly 23 comprises a third bearing, a third bearing seat and a third bearing cover; a third mounting hole for mounting the third bearing is formed in the third bearing seat, and the third bearing cover is mounted on the third bearing seat; it can be understood that a third through hole is formed in the third bearing cover, and one end of the second lead screw 12 passes through the third bearing and the third through hole to be connected with the second rotating hand wheel 19.
The fourth bearing assembly 24 comprises a fourth bearing, a fourth bearing seat and a fourth bearing cover; and the fourth bearing seat is provided with a fourth mounting hole for mounting a fourth bearing, and the fourth bearing cover is mounted on the fourth bearing seat. It can be understood that a fourth through hole is formed in the fourth bearing cover, and the other end of the second lead screw 12 penetrates through the fourth bearing and extends into the fourth through hole.
In the present invention, the first bearing assembly 21, the second bearing assembly 22, the third bearing assembly 23 and the fourth bearing assembly 24 have simple structures, convenient installation and low manufacturing cost.
In an embodiment, as shown in fig. 2 and 5, the first clamping block 13 includes a first clamping jaw 132 and a first moving block 133 having the first left-handed threaded hole 131, the first moving block 133 is further provided with a first protruding portion 1331, the first clamping jaw 132 is provided with a first clamping groove 1321, and the first moving block 133 is mounted on the first moving block 133 through the first protruding portion 1331 clamped in the first clamping groove 1321; it is understood that the lower end of the first moving block 133 abuts against the upper surface of the fixed plate 17, and the first protrusion extends from the first opening 173 and is engaged with the first engaging groove 1321 of the first clamping jaw 132.
The second clamping block 14 comprises a second clamping jaw and a second moving block provided with the first right-handed threaded hole, a second convex portion is further arranged on the second moving block, a second clamping groove is formed in the second clamping jaw, and the second moving block is installed on the second moving block through a second convex portion clamped in the second clamping groove. It can be understood that the lower end of the second moving block abuts against the upper surface of the fixed plate 17, and the second protrusion extends from the second opening 174 and is engaged with the second engaging groove of the second clamping jaw.
According to the invention, the first clamping block 13 and the second clamping block 14 are simple in structure and convenient to install.
In an embodiment, as shown in fig. 2, the third clamping block 15 includes a third clamping jaw and a third moving block having the second left-handed threaded hole, the third moving block is further provided with a third protruding portion, the third clamping jaw is provided with a third clamping groove, and the third moving block is mounted on the third moving block through the third protruding portion clamped in the third clamping groove; it can be understood that the lower end of the second moving block abuts against the upper surface of the fixed plate 17, and the third protrusion extends from the third opening 175 and is engaged with the third engaging groove of the third clamping jaw.
The fourth clamping block 16 comprises a fourth clamping jaw and a fourth moving block provided with a second right-handed threaded hole, a fourth convex portion is further arranged on the fourth moving block, a fourth clamping groove is formed in the fourth clamping jaw, and the fourth moving block is installed on the fourth moving block through a fourth convex portion clamped in the fourth clamping groove. As can be understood, the lower end of the fourth moving block abuts against the upper surface of the fixed plate 17, and the fourth protrusion extends from the fourth opening 176 and is engaged with the fourth engaging groove of the fourth clamping jaw.
According to the invention, the third clamping block 15 and the fourth clamping block 16 are simple in structure and convenient to install.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An automatic centering clamp is characterized by comprising a first screw rod, a second screw rod, a first clamping block, a second clamping block, a third clamping block, a fourth clamping block and a fixing plate; a first through groove and a second through groove are formed in the fixing plate, the center line of the first through groove is perpendicular to the center line of the second through groove, the first screw rod is rotatably installed in the first through groove, and the second screw rod is rotatably installed in the second through groove;
a first left-handed thread section and a first right-handed thread section are arranged on the first screw rod at intervals; a first left-handed thread hole matched with the first left-handed thread section is formed in the first clamping block, and a first right-handed thread hole matched with the first right-handed thread section is formed in the second clamping block; the first clamping block is movably connected to the first screw rod through the first left-hand threaded hole and the first left-hand threaded section, and the second clamping block is movably connected to the first screw rod through the first right-hand threaded hole and the first right-hand threaded section;
the second screw rod comprises a second left-handed thread section and a second right-handed thread section which are arranged at intervals; a second left-handed thread hole matched with the second left-handed thread section is formed in the third clamping block, and a second right-handed thread hole matched with the second right-handed thread section is formed in the fourth clamping block; the third clamping block is movably connected to the second screw rod through the second left-handed thread hole and the second left-handed thread section, and the fourth clamping block is movably connected to the second screw rod through the second right-handed thread hole and the second right-handed thread section.
2. The automatic centering clamp according to claim 1, wherein the first through groove is further provided with a first opening and a second opening which are distributed at intervals, one end of the first clamping block, which is far away from the first screw rod, extends out of the first opening, and one end of the second clamping block, which is far away from the first screw rod, extends out of the second opening; the first clamping block extending out of the first opening and the second clamping block extending out of the second opening are used for clamping two opposite edges of a rectangular workpiece;
the second through groove is also provided with third openings and fourth openings which are distributed at intervals, one end of the third clamping block, which is far away from the second screw rod, extends out of the third openings, and one end of the fourth clamping block, which is far away from the second screw rod, extends out of the fourth openings; and the third clamping block extending out of the third opening and the fourth clamping block extending out of the fourth opening are used for clamping two opposite edges of the rectangular workpiece.
3. The automatic centering fixture of claim 1, wherein said fixed plate comprises an upper plate and a lower plate; the first through groove and the second through groove are formed between the upper plate and the lower plate.
4. The automatic centering jig of claim 3, wherein the fixing plate further comprises a positioning pin mounted on the lower plate, the upper plate further has a positioning hole, and the upper plate is positioned and mounted on the lower plate by the positioning pin inserted into the positioning hole.
5. The automatic centering jig of claim 3, wherein a plate surface of the upper plate facing the lower plate is provided with a first weight-reducing groove, and/or a plate surface of the lower plate facing the upper plate is provided with a second weight-reducing groove.
6. The automatic centering fixture of claim 1, further comprising a first rotating handwheel mounted at one end of said first lead screw, and a second rotating handwheel mounted at one end of said second lead screw.
7. The automatic centering fixture of claim 1, further comprising first and second bearing assemblies mounted at opposite ends of said first through slot, and third and fourth bearing assemblies mounted at opposite ends of said second through slot; the opposite ends of the first screw rod are respectively rotatably arranged in the first bearing assembly and the second bearing assembly; and the opposite ends of the second screw rod are respectively and rotatably arranged in the third bearing assembly and the fourth bearing assembly.
8. The automatic centering fixture of claim 7, wherein said first bearing assembly comprises a first bearing, a first bearing seat, and a first bearing cap; the first bearing seat is provided with a first mounting hole for mounting the first bearing, and the first bearing cover is mounted on the first bearing seat;
the second bearing assembly comprises a second bearing, a second bearing seat and a second bearing cover; a second mounting hole for mounting the second bearing is formed in the second bearing seat, and the second bearing cover is mounted on the second bearing seat;
the third bearing assembly comprises a third bearing, a third bearing seat and a third bearing cover; a third mounting hole for mounting the third bearing is formed in the third bearing seat, and the third bearing cover is mounted on the third bearing seat;
the fourth bearing assembly comprises a fourth bearing, a fourth bearing seat and a fourth bearing cover; and the fourth bearing seat is provided with a fourth mounting hole for mounting a fourth bearing, and the fourth bearing cover is mounted on the fourth bearing seat.
9. The automatic centering fixture according to claim 1, wherein said first clamping block comprises a first clamping jaw and a first moving block having said first left-handed threaded hole, said first moving block further having a first protrusion, said first clamping jaw having a first engaging groove, said first moving block being mounted on said first moving block by a first protrusion engaged in said first engaging groove; and/or
The second clamping block comprises a second clamping jaw and a second moving block provided with the first right-handed threaded hole, a second convex portion is further arranged on the second moving block, a second clamping groove is formed in the second clamping jaw, and the second moving block is installed on the second moving block through a second convex portion clamped in the second clamping groove.
10. The automatic centering fixture according to claim 1, wherein said third clamping block comprises a third clamping jaw and a third moving block having said second left-handed threaded hole, said third moving block further having a third protrusion, said third clamping jaw having a third engaging groove, said third moving block being mounted on said third moving block by a third protrusion engaged in said third engaging groove; and/or
The fourth clamping block comprises a fourth clamping jaw and a fourth moving block provided with a second right-handed threaded hole, a fourth convex portion is further arranged on the fourth moving block, a fourth clamping groove is formed in the fourth clamping jaw, and the fourth moving block is installed on the fourth moving block through a fourth convex portion clamped in the fourth clamping groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110142847.3A CN112959239A (en) | 2021-02-02 | 2021-02-02 | Automatic centering clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110142847.3A CN112959239A (en) | 2021-02-02 | 2021-02-02 | Automatic centering clamp |
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| Publication Number | Publication Date |
|---|---|
| CN112959239A true CN112959239A (en) | 2021-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110142847.3A Pending CN112959239A (en) | 2021-02-02 | 2021-02-02 | Automatic centering clamp |
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| Country | Link |
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| CN (1) | CN112959239A (en) |
Cited By (1)
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| CN115303552A (en) * | 2022-07-27 | 2022-11-08 | 广东仕诚塑料机械有限公司 | Centering positioning device |
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Application publication date: 20210615 |