CN110788643B

CN110788643B - Flat tongs

Info

Publication number: CN110788643B
Application number: CN201911010152.9A
Authority: CN
Inventors: 汪建武; 叶元昶; 肖国华
Original assignee: Zhejiang Business Technology Institute
Current assignee: Linyi Industry Research Institute Co.,Ltd.
Priority date: 2019-10-23
Filing date: 2019-10-23
Publication date: 2021-07-09
Anticipated expiration: 2039-10-23
Also published as: CN110788643A

Abstract

The invention discloses a flat tongs, which comprises an active clamping part, a passive clamping part and a tongs seat, wherein a passive clamping mechanism is fixed on the tongs seat, the tongs seat is provided with a through groove vertical to the passive clamping part, slide bars are arranged on two sides of the bottom of the through groove of the tongs seat, a moving mechanism for fixing the active clamping part is arranged, the tongs seat comprises a rotating part, a moving part capable of moving up and down, two locking parts and a rotating rod with a handle, the farthest end of the rotating part is contacted with the top of the moving part, the rotating rod is connected with the rotating part, when the farthest end of the rotating part is positioned at the lowest point, the inner end and the outer end of each locking part are respectively in close contact with the moving part and the two slide bars, and when the farthest end of the rotating part is positioned at the non-lowest point, the inner end and. The clamping device has the beneficial effect that the clamping device has the characteristic of convenience in operation on the premise of better clamping stability.

Description

Flat tongs

Technical Field

The invention relates to flat tongs, in particular to flat tongs.

Background

A flat-nose pliers, also known as a machine vice, is a universal fixture, is usually used for mounting small-sized workpieces, is a random accessory of a milling machine and a drilling machine, is fixed on a machine tool workbench and is used for clamping the workpieces for cutting. The assembly structure of the traditional flat tongs is detachable threaded connection and pin connection; the linear motion of the movable clamp body is converted from spiral motion; the working surface is the friction surface of screw pair, guide rail pair and clearance fit shaft and hole. The flat tongs are simple in composition and compact in structure. The traditional flat-nose pliers need to rotate during operation due to the requirement for higher stability of clamping objects, and the spiral motion is converted into linear motion, so that the moving speed of the flat-nose pliers is lower, the objects with different sizes need to be repeatedly clamped, and the technical problem can be solved if the flat-nose pliers can be conveniently operated while keeping the better clamping stability.

Disclosure of Invention

The technical problem to be solved by the invention is to provide flat tongs which have the characteristic of convenience in operation on the premise of good clamping stability.

The invention is realized by the following technical scheme.

A flat-nose pliers comprises an active clamping piece, a passive clamping piece and a pliers seat, wherein the clamped piece is fixed on the pliers seat, the clamp seat is provided with a through groove vertical to the passive clamping piece, slide bars are arranged on two sides of the bottom of the through groove of the clamp seat, a moving mechanism for fixing the active clamping piece is arranged, it comprises a rotating part, a moving part which can move up and down, two locking parts and a rotating rod with a handle, the far end of the rotating part is contacted with the top of the moving part, the rotating rod is connected with the rotating part, when the far end of the rotating piece is positioned at the lowest point, the inner end and the outer end of the two locking pieces are respectively in close contact with the moving piece and the two sliding rods, when the far end of the rotating piece is positioned at the non-lowest point, the inner end and the outer end of the two locking pieces are respectively in non-close contact with the moving piece and the two sliding rods.

Different from the mode that changes helical motion into linear motion among the prior art, can make the moving member carry out the displacement through slightly rotating the handle, thereby make the close contact state of locking piece and slide bar and moving member change into non-close contact state, make locking piece and slide bar be in the state of loosening, then can remove initiative holder towards passive holder rapidly through promoting the handle, rotate handle recovery locking piece and moving member again behind the tight article, the close contact state of slide bar, thereby realize flat-nose pliers's function.

Furthermore, the moving mechanism further comprises a fixed seat, the fixed seat is assembled in a sliding mode through the through groove, positioning parts are arranged on the front portion and the rear portion of the fixed seat respectively, the fixed seat is located in a space for containing the positioning parts, the two positioning parts are provided with through holes for the rotating rods to penetrate through, and one end of each rotating rod is connected and arranged to be close to the positioning part of the passive clamping piece.

Furthermore, the two sides of the moving piece are in sliding fit with the inner wall of the fixed seat, the moving piece is provided with a moving piece top and a moving piece lower part, the moving piece top is in contact with the far end of the rotating piece, the cross section of the moving piece lower part is in a trapezoid shape and is in an isosceles trapezoid shape, the upper part of the isosceles trapezoid is wide, the lower part of the isosceles trapezoid is narrow, the locking piece can horizontally move, the inner end of the locking piece is matched with the side shape of the moving piece lower part, and.

The setting up of fixing base plays the effect of protection rotation piece on the one hand and ensures that rotation piece can not take place the dislocation phenomenon along the fore-and-aft direction, also is the part as holding the moving member simultaneously to support the moving member and carry out displacement from top to bottom and regard as the slide, on the other hand the space that the fixing base held the rotation piece has also restricted the rotation range of moving member, has played the compact type of protection overall structure.

Further, the bottom fixedly connected with box body of fixing base, two sides of box body are provided with the through-hole, two the locking piece all passes the through-hole and rather than sliding fit.

Set up the box body and play the effect of protection moving member on the one hand, on the other hand sets up the through-hole and can make the locking piece carry out horizontal migration, and the cooperation moving member reciprocates the change that realizes the outer end of locking piece and the contact relation of slide bar.

Further, the bottom of moving member lower part is provided with vertical connecting rod, the connecting rod passes the bottom of box body, the connecting rod cover is equipped with the answer spring, the top and the bottom of answer spring fixed connection respectively the bottom of moving member lower part and the bottom of affiliated box body, when the distal end of rotating the piece is located the minimum, the answer spring is in compression state.

When the rotating rod is rotated to rotate the rotating piece, the far end of the rotating piece can move upwards from the lowest position, the connecting rod and the return spring are arranged, the moving piece can always have the trend of moving upwards, namely the moving piece can move upwards rapidly, and therefore the locking piece can rapidly release the locking state with the sliding rod.

Further, the middle part of the top of the moving part is provided with a concave area, and the concave area is matched with the shape of the far end of the rotating part.

The concave area is arranged in the middle of the top of the moving part, so that the far end of the rotating part can smoothly slide on the top of the moving part, the situation that the rotating part and the moving part are mutually clamped is avoided, and the locking/loosening state of the locking part and the sliding rod can be quickly operated.

Furthermore, the inner walls of the two sides of the fixing seat are provided with limiting blocks with the same height, and the limiting blocks are used for blocking the moving piece from continuing to move upwards.

The maximum height of the moving part moving upwards is limited by the limiting block, and the moving part is prevented from moving upwards for too long, so that the operation amplitude of rotating the far end of the rotating part to the lowest point cannot be too large again.

Furthermore, the moving mechanism further comprises a shell and a rear cover, wherein the top surfaces of the two sides of the through groove of the clamp seat are provided with slideways parallel to the through groove, the shell is slidably assembled on the slideways and buckled outside the fixed seat, the front end and the rear end of the shell are respectively fixed with the driving clamping piece and the rear cover, and the rear cover is provided with a through hole for the rotating rod to pass through.

The shell and the rear cover are used as a shell mechanism of the whole moving mechanism, the protection effect of the whole structure is achieved, and the moving mechanism moves more stably and smoothly on the clamp seat through the defined matching of the shell and the sliding way.

Furthermore, both ends of the sliding rod are fixedly connected with fixing pieces, and the fixing pieces are fixedly connected to the side portions of the clamp seats through the fixing pieces.

The fixing piece is arranged so that the distance between the two sliding rods can be adjusted, and therefore the tight contact degree between the locking piece and the sliding rods, namely the locking performance, can be adjusted.

The invention has the beneficial effects that:

through the in close contact who sets up slide bar and locking piece for locking initiative holder, and set up and rotate the piece, the rotation that will rotate the piece converts reciprocating of moving piece into to realize that locking piece and slide bar are in the locking state or loosen the state, whole operation process compares prior art's plain vice easy to operate, can realize the purpose of pressing from both sides the article fast tightly.

Drawings

FIG. 1 is a perspective view of a flat-nose pliers;

FIG. 2 is a schematic cross-sectional view of a flat-nose pliers;

FIG. 3 is a partial perspective view of the fixing base;

FIG. 4 is a schematic sectional view of the caliper mount and the slide rod.

Detailed Description

The invention is explained in more detail below with reference to the figures and examples.

Fig. 1-4 show that the flat-nose pliers of the invention comprise an active clamping part 1, a passive clamping part 2, a passive clamping seat 21, a pliers seat 3 and a moving mechanism, wherein the passive clamping seat 21 is fixed at one end of the pliers seat 3, the passive clamping part 2 is fixed at the passive clamping seat 21, and the active clamping part 1 and the passive clamping part 2 are both in a plate-shaped structure and are parallel to each other. The active clamping member 1 and the passive clamping member 2 are used for clamping an object to be clamped, and the clamping surfaces of the active clamping member 1 and the passive clamping member 2 can be provided with anti-slip structures, such as staggered strip structures.

The caliper seat 3 is provided with a through groove 30 perpendicular to the passive clamping piece 2 and the active clamping piece 1, and the through groove 30 is mainly used for sliding of the moving mechanism. Slide bars 31 are arranged on two sides of the bottom of the through groove 30 of the caliper seat 3. In order to protect the sliding rod 31, two grooves matched with the sliding grooves can be arranged at the bottom of the clamp seat 3, and the sliding grooves are arranged in the grooves, so that two sides to be faced can be exposed.

The moving mechanism, which is used as a mechanism for carrying the active clamping member 1, needs to have a function of sliding in the through groove 30, and the structure thereof includes a rotating member 41, a moving member 42, two locking members 43, a fixed seat 44, a housing 45, a rear cover 46, a box body 47, a rotating rod 48 and a handle 49. A rotating member 41, a moving member 42, locking members 43 and a rotating lever 48, which are the main actuating moving mechanism, are in a locked state or an unlocked state, the handle 49 is mounted at one end of the rotating lever 48, the distal end of the rotating member 41 is in contact with the top of the moving member 42, the two locking members 43 are linked with the moving member 42, when the distal end of the rotating member 41 is at the lowest point, the inner and outer ends of the two locking members 43 are in close contact with the moving member 32 and the two slide bars 31, respectively, that is, the moving mechanism is in the locked state, the rotating lever 48 is connected with the rotating member 41, when the user rotates the rotating lever 48 by rotating the handle 49, the distal end of the rotating member 41 is away from the lowest point, the moving member 32 moves upward, and the two locking members 43 are separated from the two slide bars 31, even if the moving mechanism is in the unlocked state, the user can hold the handle 49 to push the moving mechanism, after the object is clamped, the handle 49 is turned to make the two locking pieces 43 tightly contact with the two sliding rods 31.

The fixing seat 44, which is a component for assembling the rotating member 41, is a main structure of the moving mechanism, the fixing seat 44 is slidably assembled in the through groove 30, two sides of the bottom of the fixing seat are slidably fitted with two side walls of the through groove 30, the front part and the rear part of the fixing seat 44 are respectively provided with the positioning portions 441, a space for accommodating the rotating member 41 is arranged between the two positioning portions 441 of the fixing seat 44, the two positioning portions 441 are in contact with two front and rear end surfaces of the rotating member 41, and the two positioning portions 441 mainly serve to fix the front and rear positions of the rotating member 41 in the fixing seat 44, so as not to affect the rotating performance thereof, so that the contact between the positioning portions 441 and the rotating member 41 is not in close contact, and the space for accommodating the positioning members can allow the. Of course, the two positioning portions 441 have through holes for the rotation rod 48 to pass through, and one end of the rotation rod 48 is connected to the positioning portion 441 near the passive clamp 2, and the positioning portion 441 may be provided with a bearing for connecting the rotation rod 48. The two sides of the moving part 42 are in sliding fit with the inner wall of the fixed seat 44. Considering the smoothness of the moving member 42 sliding on the inner wall of the fixed seat 44, a vertical sliding groove may be provided on the inner wall of the fixed seat 44, and sliding bars matching with the sliding groove may be provided on both sides of the moving member 42. The moving member 42 has a moving member top 421 and a moving member lower 422, the moving member top 421 serves as a member contacting the distal end of the rotating member 41, and the moving member lower 422 serves as a member linking with the two locking members 43. The cross section of the moving member lower part 422 is trapezoid, and is isosceles trapezoid with wide upper part and narrow lower part, the locking member 43 can move horizontally and the inner end of the locking member 43 fits with the side shape of the moving member lower part 422, so that when the moving member lower part 422 moves upwards along with the rotation of the rotating member, the trapezoid structure will increase the horizontal distance between the sliding rod 31 and the moving member lower part 422, and the locking member 43 and the sliding rod 31 are in non-close contact.

Obviously, the moving member 42 must have a tendency to move upward, so that the moving member 42 moves upward along with the upward movement of the height of the distal end of the rotating member 41. The bottom of the fixing seat 44 is fixedly connected with the box body 47, two side faces of the box body 47 are provided with through holes, and the two locking pieces 43 penetrate through the through holes and are in sliding fit with the through holes. In order to ensure the stability of the locking member 43 on the box body 47, the box body 47 is provided with an extension section 470 at the through hole, and the extension section 470 extends the contact length of the locking member 43 on the box body 47, so that the phenomenon that two ends of the locking member 43 shake up and down is avoided. The bottom of moving member lower part 422 is provided with vertical connecting rod 423, connecting rod 423 passes the bottom of box body 47, connecting rod 423 cover is equipped with return spring 424, return spring 424's top and bottom fixed connection respectively the bottom of moving member lower part 422 and the bottom of affiliated box body 47, when the distal end of rotating the piece is located the minimum, return spring 424 is in compression state, the both sides inner wall of fixing base 44 all is provided with the stopper 442 of same height, stopper 442 is used for blockking moving member 42 continues the rebound, sets up stopper 442 and makes the maximum height that moving member 42 moved up obtain the restriction, avoids moving member 42 to move up the distance too big.

Therefore, when the handle 49 is rotated, the rotating lever 48 rotates the rotating member 41 so that the distal end of the rotating member 41 is moved away from the lowest position, and the restoring spring 424 is in the compressed state, the moving member 42 is moved upward so that the horizontal distance between the side surface of the slide rod 31 and the lower portion 422 of the moving member is increased, and the close contact state between the locking member 43 and the slide rod 31 is released even though the opening jaw is in the released state, and after the clamping is completed, the handle 49 is rotated again to restore the locked state. In order to make the sliding between the distal end of the rotating member 41 and the moving member top 421 smoother when the rotating member rotates, a concave area 421-a is provided in the middle of the moving member top 421, and the concave area 421-a is matched with the shape of the distal end of the rotating member 41.

The housing 45 and the rear cover 46 are the housing 45 of the moving mechanism, and protect the fixed base 44, the rotating member 41, and the like in the moving mechanism. The top surfaces of the caliper seat 3 at two sides of the through slot 30 are provided with slide ways 32 parallel to the through slot 30, the housing 45 is slidably assembled on the slide ways 32, the housing 45 is slidably fitted with the slide ways 32, and the housing 45 and the fixing seat 44 are slidably fitted in the through slot 30 to supplement each other, so that the stability of the movement of the moving mechanism on the caliper seat 3 can be further enhanced, the housing 45 is fastened outside the fixing seat 44, the front end and the rear end of the housing 45 are respectively fixed with the active clamping member 1 and the rear cover 46, in this embodiment, the fixed connection is realized by arranging a plurality of fastening screws, or other equivalent fixing modes can be adopted, the rear cover 46 has a through hole for allowing the rotating rod 48 to pass through, so as to provide a better protection effect for the rotating rod 48, and prevent the rotating rod 48 from being damaged or deformed to affect the operation of the rotating rod 48, therefore, a protruding section 461 is provided in the middle of the rear cover 46 along the axial direction of the rotating rod 48, a portion of the rotating rod 48 is located in the protruding section 461, and the rotating rod 48 exposed from the protruding section 461 is the portion connected with the handle 49.

In this embodiment, the two ends of the sliding rod 31 are fixedly connected with fixing pieces 311, the fixing pieces 311 are fixedly connected to the side portions of the jaw base 3 through fixing pieces 312, the fixing pieces 312 are fastening screws, and the horizontal distance between the two sliding rods 31, that is, the horizontal distance between the sliding rod 31 and the lower portion 422 of the rotating piece, can be adjusted according to the screwing degree of the fixing pieces, so as to adjust the degree of tight contact between the sliding rod 31 and the locking piece 43, and can be adjusted adaptively according to the strength of the object to be clamped.

The embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A pair of flat tongs comprises an active clamping part, a passive clamping part and a tong seat, wherein the passive clamping part is fixed on the tong seat, the tong seat is provided with a through groove vertical to the passive clamping part, and slide rods are arranged on two sides of the bottom of the through groove The outer ends of the two sliding rods are respectively in non-close contact with the moving piece and the two sliding rods;

the moving mechanism also comprises a fixed seat, the fixed seat is assembled in the through groove in a sliding manner, the front part and the rear part of the fixed seat are respectively provided with a positioning part, the fixed seat is positioned between the two positioning parts and is provided with a space for accommodating the rotating part, the two positioning parts are provided with through holes for the rotating rod to pass through, one end of the rotating rod is connected with the positioning part close to the passive clamping part, the two sides of the moving part are in sliding fit with the inner wall of the fixed seat, the moving part is provided with a moving part top part which is contacted with one end of the rotating part far away from the rotating center and a moving part lower part, the cross section of the lower part of the moving part is in a trapezoid shape, the upper part of the moving part is in an isosceles trapezoid shape, the locking part can move horizontally, the, the bottom fixedly connected with box body of fixing base, two sides of box body are provided with the through-hole, two the locking piece all passes the through-hole and rather than sliding fit, the bottom of moving member lower part is provided with vertical connecting rod, the connecting rod passes the bottom of box body, the connecting rod cover is equipped with the answer spring, the top and the bottom of answer spring are fixed connection respectively the bottom of moving member lower part and the bottom of affiliated box body, work as when the one end of rotating the piece of keeping away from the rotation center is located the minimum, the answer spring is in compression state.

2. The flat-nose pliers according to claim 1, wherein the moving member has a depressed area in the middle of the top thereof, the depressed area being in shape fit with an end of the rotating member remote from the center of rotation.

3. The flat-nose pliers according to claim 1, wherein the inner walls of the two sides of the fixed base are provided with stoppers of the same height, and the stoppers are used for blocking the moving member from moving upwards.

4. The flat-nose pliers according to claim 3 wherein the moving mechanism further comprises a housing and a rear cover, the top surfaces of the pliers seats on both sides of the through slot are provided with slideways parallel to the through slot, the housing is slidably assembled on the slideways and fastened outside the fixing seat, the front end and the rear end of the housing respectively fix the active clamping member and the rear cover, and the rear cover has a through hole for the rotating rod to pass through.

5. The flat-nose pliers according to claim 1, wherein fixing members are fixedly connected to both ends of the sliding rod, and the fixing members are fixedly connected to the side portions of the pliers seat by fastening members.