CN214686074U - Clamping device - Google Patents

Abstract

The utility model provides a clamping device, include: the clamping component can move back and forth; the clamping assembly includes: the symmetrical bidirectional screw rod, the nut block and the jaw; the nut block is provided with a clearance structure; the bottom of the jaw is provided with a first groove; a cavity is formed on the inner side of the base, and the symmetrical bidirectional screw rods are positioned in the cavity; a sliding groove matched with the jaw is formed in the outer side of the base, and a second groove is formed in the inner side of the base; the jaw is mutually embedded and connected with the second groove; the nut blocks are sleeved at two ends of the symmetrical bidirectional screw rods and are in threaded connection with the symmetrical bidirectional screw rods; when the clearance structure faces the first groove, the first groove is attached to the clearance structure, and the nut block drives the jaw to slide along the bidirectional screw rod; when keeping away empty structure orientation second recess, the second recess is connected with keeping away empty structure laminating, and the nut piece is kept silent with the separation. The utility model provides a simple structure's clamping device is convenient for maintain and use.

Description

Clamping device

Technical Field

The utility model relates to the technical field of machinery, especially, relate to a clamping device.

Background

The bench vice is also called vice or bench vice. A vise is a universal fixture used to clamp workpieces. Generally, a bench vice is mounted on a worktable for stably clamping a workpiece to be machined, which is a necessary tool for a bench workshop.

In a conventional vise, the jaw is generally connected to the slide block through a screw rod, and the slide block moves the jaw.

The jaw and the sliding block are generally connected through various structural parts, such as positioning pins, positioning holes and the like, and the jaw and the sliding block are complex in structure and difficult to maintain.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention has been made in order to provide a clamping device that overcomes or at least partially solves the above problems.

In order to solve the above problem, the utility model discloses a clamping device, include: the clamping component can move back and forth; the clamping assembly comprises: the symmetrical bidirectional screw rod, the nut block and the jaw; the nut block is provided with a clearance structure; a first groove is formed in the bottom of the jaw;

a cavity is formed on the inner side of the base, and the symmetrical bidirectional screw rod is positioned in the cavity;

a sliding groove matched with the jaw is formed in the outer side of the base, and a second groove is formed in the inner side of the base; the jaw and the second groove are mutually embedded and connected;

the nut blocks are sleeved at two ends of the symmetrical bidirectional screw rod and are in threaded connection with the symmetrical bidirectional screw rod;

when the clearance structure faces the first groove, the first groove is attached to the clearance structure, and the nut block drives the jaw to slide along the bidirectional screw;

when keeping away empty structure orientation when the second recess, the second recess with keep away empty structure laminating when being connected, the nut piece with keep away empty structure separation of keeping silent.

Optionally, the nut block comprises a nut body, and a first boss and a second boss which are oppositely arranged on the top of the nut body;

the space avoiding structure is composed of the first boss, the second boss and an area between the first boss and the second boss;

the distance between the first boss and the midpoint of the bidirectional screw rod is smaller than the distance between the second boss and the midpoint of the symmetrical bidirectional screw rod.

Optionally, a first guide portion is disposed on a side of the first boss opposite to the second boss, and a second guide portion is disposed on a side of the second boss opposite to the first boss.

Optionally, the second boss is provided with a first bevel opening; the jaw is provided with a second bevel opening matched with the first bevel opening.

Optionally, the inner side of the base comprises opposing first and second inner walls;

the first inner wall and the second inner wall are respectively provided with one second groove.

Optionally, the chute is provided with a plurality of first insection rails; the jaw is provided with a second insection guide rail which is in adaptive connection with the first insection guide rail.

Optionally, the jaws include a dovetail slot at the top and a dowel pin.

Optionally, the base is provided with a support block; the middle part of the symmetrical bidirectional screw rod is provided with a screw rod limiting groove matched with the supporting block;

the supporting block is embedded into the screw rod limiting groove.

Optionally, chip removal holes are formed in positions, parallel to two sides of the symmetrical bidirectional screw rod, of the base, and the chip removal holes are communicated with spaces, where the symmetrical bidirectional screw rod is located, outside the base and inside the base.

Optionally, the bottom of the periphery of the base is provided with a fixed pressure groove;

the bottom surface of base is provided with a plurality of extension screw holes, the extension screw hole is used for with other anchor clamps compatible connection.

The utility model discloses a following advantage:

the symmetrical two-way screw rod is positioned in a cavity formed on the inner side of the base, the nut block in threaded connection with the symmetrical two-way screw rod is provided with a clearance structure, when the clearance structure turns to the first groove of the jaw and is connected with the first groove, the nut block is locked with the jaw, the nut block can move in the cavity when the symmetrical two-way screw rod rotates, the nut block moves to drive the jaw to move, and the nut blocks positioned at two ends of the two-way screw rod can move in the opposite direction or in the opposite direction when the symmetrical two-way screw rod rotates, so that the jaws respectively locked with the two nut blocks can clamp or release a clamping object (for example, a workpiece to be processed); when the clearance structure turns to the second groove of the base and is connected with the second groove, the nut block and the jaw are unlocked, and the nut block and the jaw can be separated from each other, so that the clamping device with simple structure and convenient maintenance and jaw replacement is provided.

Drawings

Fig. 1 is a schematic structural view of a holding device according to the present invention;

fig. 2 is an exploded view of a clamping device of the present invention;

fig. 3 is a bottom view of a clamping device of the present invention;

fig. 4 is a schematic structural view of a clamping assembly in a clamping device according to the present invention;

fig. 5 is a schematic cross-sectional view of a clamping device of the present invention;

fig. 6 is another schematic structural view of a clamping assembly in a clamping device according to the present invention;

fig. 7 is a schematic view of another structure of the clamping assembly in the clamping device of the present invention;

fig. 8 is another schematic structural view of a holding device of the present invention;

fig. 9 is another schematic structural view of another clamping device according to the present invention.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

The utility model discloses an one of the core design lies in, set up two-way lead screw 210 of symmetry in the inboard space of base 100, and set up in nut piece 220 and keep away empty structure 221, keep away empty structure 221 through rotating and realize nut piece 220 and keep silent 230 locking and unblock, when nut piece 220 and keep silent 230 locking, can be through rotating the two-way lead screw 210 of symmetry of being connected with nut piece 220, make nut piece 220 can carry out the back and forth movement along two-way lead screw, when realizing keeping silent 230 centre gripping and unclamping the centre gripping object, be convenient for maintain overall structure.

Referring to fig. 1, a block diagram of a clamping device of the present invention is shown, and fig. 2 is an exploded view of a clamping device of the present invention; fig. 3 is a bottom view of a clamping device of the present invention; the embodiment of the utility model provides a can specifically include: the method comprises the following steps: a fixed base 100 and a reciprocally movable clamping assembly 200; the clamping assembly 200 includes: a symmetrical bidirectional screw 210, a nut block 220 and a jaw 230; the nut block 220 is provided with a clearance structure 221; the bottom of the jaw 230 is provided with a first groove 231;

a cavity is formed on the inner side of the base 100, and the symmetrical bidirectional screw rod 210 is positioned in the cavity;

a sliding groove 110 adapted to the jaw 230 is arranged on the outer side of the base 100, and a second groove 120 is arranged on the inner side of the base 100; the jaw 230 and the second groove 120 are mutually connected in a fitting manner;

the nut blocks 220 are sleeved at two ends of the symmetrical bidirectional screw rod 210 and are in threaded connection with the symmetrical bidirectional screw rod 210;

when the clearance structure 221 faces the first groove 231, the first groove 231 is attached to the clearance structure 221, and the nut block 220 drives the jaw 230 to slide along the bidirectional screw;

when the clearance structure 221 faces the second groove 120, and the second groove 120 is attached to the clearance structure 221, the nut block 220 is separated from the jaw 230.

The sliding groove 110 is disposed outside the base 100, and guides the jaw 230, so that the jaw 230 can move along the sliding groove 110.

Referring to fig. 4, a schematic structural diagram of a clamping assembly 200 in a clamping device according to the present invention is shown. Fig. 5 is a schematic cross-sectional view of a holding device according to the present invention. When the clearance structure 221 is connected with the first groove 231, the nut block 220 and the jaw 230 are in a locked state, and because the nut block 220 is in threaded connection with the symmetrical bidirectional screw 210, when the symmetrical bidirectional screw 210 rotates, the nut block 220 can reciprocate along the symmetrical bidirectional screw 210, and meanwhile, the nut block 220 can drive the jaw 230 in the locked state to reciprocate, so that the reciprocating motion of the clamping assembly 200 is realized (as shown in fig. 6-7).

Referring to fig. 8, another schematic structural diagram of a clamping device of the present invention is shown. When the clearance structure 221 is connected to the second groove 120, the nut block 220 and the jaw 230 are in an unlocked state, and the jaw 230 can be separated from the nut block 220.

In the embodiment of the present invention, the symmetrical bi-directional screw rod 210 is located in the cavity formed inside the base 100, the clearance structure 221 is disposed in the nut block 220 in threaded connection with the symmetrical bi-directional screw rod 210, when the clearance structure 221 is turned to and connected with the first groove 231 of the jaw 230, the nut block 220 is locked with the jaw 230, the nut block 220 can move in the cavity when the symmetrical bi-directional screw rod 210 rotates, the nut block 220 moves to drive the jaw 230, the nut blocks 220 located at both ends of the bi-directional screw rod can move in the opposite direction or in the reverse direction when the symmetrical bi-directional screw rod 210 rotates, so that the jaws 230 can clamp or release a clamping object (for example, a workpiece to be processed) with the two nut blocks 220 respectively; when the clearance structure 221 is turned to the second groove 120 of the base 100 and connected thereto, the nut block 220 is unlocked from the jaw 230, and the nut block 220 and the jaw 230 can be separated from each other, thereby providing a clamping device having a simple structure and facilitating maintenance and replacement of the jaw 230.

In a specific example, when the nut block 220 clamps the clamping object, the nut block 220 may be moved back by controlling the symmetrical bidirectional screw 210 to rotate in a designated direction, and the clamping object may be released. When the symmetrical bidirectional screw 210 continues to rotate in the designated direction, the nut block 220 continues to move back to back. When the nut block 220 moves to a position corresponding to the second groove 120, the bidirectional screw is controlled to continue to move according to a specified direction, the clearance structure 221 rotates along the specified direction, the clearance structure 221 gradually faces the second groove 120 from the first groove 231, and when the clearance structure 221 finishes facing the second groove 120, the jaw 230 is separated from the nut block 220 in an unlocking mode. At this time, the jaw 230 may be replaced or other operations may be performed, when the jaw 230 and the nut block 220 need to be locked, the jaw 230 may be placed at a position corresponding to the clearance mechanism, the bidirectional screw is controlled to rotate in the opposite direction of the designated direction, and the nut block 220 is immediately rotated, so that the clearance mechanism 221 rotates from facing the second groove 120 to facing the first groove 231, so as to achieve the locking of the nut block 220 and the jaw 230.

In an optional embodiment of the present invention, the nut block 220 includes a nut body 222, and a first boss 223 and a second boss 224 oppositely disposed on the top of the nut body 222;

the void avoiding structure 221 is formed by the first boss 223, the second boss 224, and a region between the first boss 223 and the second boss 224;

wherein, the distance between the first boss 223 and the midpoint of the bidirectional screw is smaller than the distance between the second boss 224 and the midpoint of the symmetrical bidirectional screw 210.

Each nut block 220 comprises a nut body 222, a first boss 223 and a second boss 224, the nut body 222 is of a hollow pipeline structure, and the inner wall of the nut body 222 is provided with threads matched with the symmetrical bidirectional screw rod 210. It will be appreciated that the two-way lead screw has opposite thread directions from the two ends to the midpoint, i.e. the symmetrical two-way lead screw 210 is provided with a first thread and a second thread, the first thread and the second thread being opposite in direction.

The screw threads in the nut bodies 222 sleeved at the two ends of the symmetrical two-way screw rod 210 are respectively matched with the first screw threads and the second screw threads, and the first boss 223 and the second boss 224 of the nut block 220 are limited by the inner side of the base 100, so that when the two-way screw rod rotates, the nut block 220 can rotate relative to the two-way screw rod along the first screw threads and the second screw threads respectively, and at the moment, the nut block 220 can translate along the symmetrical two-way screw rod 210.

A certain distance is arranged between the first boss 223 and the second boss 224, the clearance structure 221 is formed by the first boss 223 and the second boss 224 and the area between the first boss 223 and the second boss 224, and the shape of the clearance structure 221 is matched with the first groove 231 and the second groove 120, so that the clearance structure 221 can be connected with one of the first groove 231 and the second groove 120 at the corresponding position.

In an optional embodiment of the present invention, a first guiding portion 225 is disposed on a side of the first boss 223 opposite to the second boss 224, and a second guiding portion 226 is disposed on a side of the second boss 224 opposite to the first boss 223.

A first guide part 225 is arranged on one side of the first boss 223 facing the second boss 224, and a second guide part 226 is arranged on one side of the second boss 224 facing the first boss 223, so that when the clearance structure 221 is connected with the first groove 231 and the second groove 120, the occurrence of a clamping phenomenon is reduced, and the connection process is more flow-processed.

In an optional embodiment of the present invention, the second boss 224 is provided with a first bevel; the jaw 230 is provided with a second bevel adapted to the first bevel.

By providing the first bevel opening and the second bevel opening, abnormal movement of the jaw 230 in a direction perpendicular to the moving direction of the nut block 220 when the jaw 230 clamps a clamping object is avoided, that is, the jaw 230 is prevented from tilting.

In an alternative embodiment of the present invention, the inner side of the base 100 comprises a first inner wall and a second inner wall opposite to each other;

the first inner wall and the second inner wall are respectively provided with one second groove 120.

The second groove 120 is disposed in the interior of the base 100 such that the nut block 220 can rotate to face the second groove 120 and connect with the second groove 120 when moving to a position corresponding to the second groove 120 in the interior of the base 100, such that the nut block 220 is unlocked from the jaw 230 and the jaw 230 can be separated from the nut block 220.

In an optional embodiment of the present invention, the sliding groove 110 is provided with a plurality of first insection guide rails; the jaw 230 is provided with a second toothed rail 232 which is fittingly connected to the first toothed rail.

Through the adaptive connection of the first and second toothed rails 232, jaw 230 is made more stable during movement. Meanwhile, jaw 230 may be vertically limited such that jaw 230 can only be separated from base 100 by sliding to two ends of second rail 232, thereby preventing jaw 230 from being separated from base 100 from the top of base 100.

It will be appreciated that the chute 110 may also be provided with other guide rails, such as: a striped rail, etc.

In an alternative embodiment of the present invention, the jaw 230 includes a dovetail groove 233 at the top and a locating pin 234.

As shown in fig. 6, the bottom of the target workpiece 300 may be provided with a structure matched with the dovetail groove 233, so that the dovetail groove 233 can be attached to the target workpiece 300, and the jaw 230 can clamp the target workpiece 300 more firmly. The positioning pin 234 at the top of the jaw 230 can be adapted to connect with the target workpiece 300 to prevent the target workpiece 300 from shifting.

As shown in fig. 7, when the jaws 230 are moved back, the dovetail groove 223 is separated from the target workpiece 300 so that the target workpiece 300 can be separated from the jaws 230.

In one example, locating pin 234 is an integrally formed structure with the top of jaw 230.

In another example, the top of jaw 230 is provided with a dowel hole, and dowel pin 234 is inserted into dowel hole, thereby securing dowel pin 234 to the top of jaw 230.

In an alternative embodiment of the present invention, the base 100 is provided with a supporting block; the middle part of the symmetrical bidirectional screw 210 is provided with a screw limiting groove matched with the supporting block;

the supporting block is embedded into the screw rod limiting groove.

The support blocks are embedded into the lead screw limiting grooves, so that the support blocks support the bidirectional lead screw and limit the symmetrical bidirectional lead screw 210, and the bidirectional lead screw is prevented from shifting in the moving process of the nut block 220.

In an optional embodiment of the present invention, the position of the base 100 parallel to the two sides of the symmetrical two-way screw rod 210 is provided with a clearance hole 140, and the clearance hole 140 communicates the space where the symmetrical two-way screw rod 210 inside the base 100 is located with the outside of the base 100.

Through being provided with chip removal hole 140 at base 100 to through chip removal hole 140 intercommunication base 100 outside and the inside space that two-way lead screw 210 of symmetry of base 100 was located, make the piece that drops to two-way lead screw 210 of symmetry can directly discharge the clamping device outside, need not the manual work and clear away the piece, improve clamping device's work efficiency.

In an optional embodiment of the present invention, the bottom of the periphery of the base 100 is provided with a fixing pressure groove 150; the bottom surface of the base 100 is provided with a plurality of extended threaded holes 160, and the extended threaded holes 160 are used for compatible connection with other clamps.

The base 100 is positioned by the fixing indent 150 being connected to a fixing component (e.g., a table, a lathe) to prevent the base 100 from shifting during the operation of the clamping device.

In one example, enlarged threaded bore 160 may be coupled with a blind rivet.

Referring to fig. 9, another schematic structural view of another clamping device of the present invention is shown.

Because jaw 230 may be separated from nut 220 and thus from base 100 such that jaw 230 may be replaced, in an alternative embodiment of the present invention, jaw 230 may include a tiger's claw 235 and third bosses 236 on either side of the tiger's claw.

The tiger claw 235 is provided with a concave-convex structure, so that the friction force between the tiger claw 236 and a clamped object is increased, and the clamped object is prevented from slipping out.

The third boss 236 can provide support for a clamped object such that the clamped object is more even as the jaws 230 tighten or loosen the clamped object.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.

The above detailed description is given to the clamping device provided by the present invention, and the principle and the implementation of the present invention are explained by applying specific examples, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims (10)

1. A clamping device, comprising: the clamping component can move back and forth; the clamping assembly comprises: the symmetrical bidirectional screw rod, the nut block and the jaw; the nut block is provided with a clearance structure; a first groove is formed in the bottom of the jaw;

a cavity is formed on the inner side of the base, and the symmetrical bidirectional screw rod is positioned in the cavity;

a sliding groove matched with the jaw is formed in the outer side of the base, and a second groove is formed in the inner side of the base; the jaw and the second groove are mutually embedded and connected;

the nut blocks are sleeved at two ends of the symmetrical bidirectional screw rod and are in threaded connection with the symmetrical bidirectional screw rod;

when the clearance structure faces the first groove, the first groove is attached to the clearance structure, and the nut block drives the jaw to slide along the bidirectional screw;

when keeping away empty structure orientation when the second recess, the second recess with keep away empty structure laminating when being connected, the nut piece with keep away empty structure separation of keeping silent.

2. The clamping device of claim 1, wherein the nut block includes a nut body, and first and second bosses oppositely disposed at a top of the nut body;

the space avoiding structure is composed of the first boss, the second boss and an area between the first boss and the second boss;

the distance between the first boss and the midpoint of the bidirectional screw rod is smaller than the distance between the second boss and the midpoint of the symmetrical bidirectional screw rod.

3. Clamping device according to claim 2, characterized in that the first boss is provided with a first guide on the side opposite to the second boss and the second boss is provided with a second guide on the side opposite to the first boss.

4. Clamping device according to claim 2, wherein the second boss is provided with a first bezel; the jaw is provided with a second bevel opening matched with the first bevel opening.

5. The clamping device of claim 1 wherein the interior side of the base includes first and second opposing interior walls;

the first inner wall and the second inner wall are respectively provided with one second groove.

6. Clamping device according to claim 1, characterized in that the slide groove is provided with a plurality of first insection guides; the jaw is provided with a second insection guide rail which is in adaptive connection with the first insection guide rail.

7. A gripping apparatus according to claim 1, wherein the jaws include a dovetail slot at the top and a dowel pin.

8. Clamping device according to claim 1, wherein the base is provided with a support block; the middle part of the symmetrical bidirectional screw rod is provided with a screw rod limiting groove matched with the supporting block;

the supporting block is embedded into the screw rod limiting groove.

9. The clamping device as claimed in claim 1, wherein the base is provided with chip removal holes at positions parallel to two sides of the symmetrical bidirectional screw rod, and the chip removal holes are communicated with the space where the symmetrical bidirectional screw rod is located between the outside of the base and the inside of the base.

10. The clamping device as claimed in claim 1, wherein the base is provided with a fixing pressure groove at the bottom of the periphery;

the bottom surface of base is provided with a plurality of extension screw holes, the extension screw hole is used for with other anchor clamps compatible connection.

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