CN114102198A

CN114102198A - Machine tool fixture capable of achieving internal self-locking and avoiding looseness during clamping

Info

Publication number: CN114102198A
Application number: CN202111317972.XA
Authority: CN
Inventors: 戴桐; 乔甡; 金秋
Original assignee: Yangzhou Jinxinyi Electric Tools Co ltd
Current assignee: Yangzhou Jinxinyi Electric Tools Co ltd
Priority date: 2021-11-09
Filing date: 2021-11-09
Publication date: 2022-03-01

Abstract

The invention discloses a machine tool fixture capable of realizing internal self-locking and avoiding looseness during clamping, which comprises a workbench, a placing seat arranged at the top of the workbench, a screw rod arranged in the workbench and two clamping blocks arranged outside the screw rod, wherein a gear is arranged on the inner side surface of the workbench; through gear and screw rod meshing design, make the gear can carry out synchronous rotation along with the screw rod, through mutually supporting between ratchet and the gag lever post, can restrict the antiport of gear, make the gear can only unidirectional rotation, thereby the screw rod can only unidirectional rotation drive the grip block and press from both sides tightly the work piece, can carry out the auto-lock to the screw rod in the work piece centre gripping process, avoided the work piece not set up locking mechanism at the centre gripping process screw rod and leaded to the work piece to appear not hard up the condition easily and take place, thereby the going on of work piece normal processing work has been guaranteed, also make the machining precision of work piece can improve to some extent simultaneously.

Description

Machine tool fixture capable of achieving internal self-locking and avoiding looseness during clamping

Technical Field

The invention relates to the technical field of machine tool fixtures, in particular to a machine tool fixture capable of self-locking inside and avoiding looseness during clamping.

Background

The lathe is the most common equipment among the metal machining, when the course of working to the work piece, often need use anchor clamps to come to carry out the centre gripping to the work piece fixed, ordinary anchor clamps generally comprise clamping screw and grip block, and, do not be provided with relevant tight self-locking mechanism that presss from both sides on the current anchor clamps, consequently at the in-process of in-service use, because vibrations in the course of working or the centre gripping of centre gripping in to the work piece are not enough to be fastened, just make the not hard up condition appear in the work piece very easily in the course of working, when not hard up condition is comparatively serious, not only can make work piece processing failure, can also make the condition that the damage appears to the processing cutter, even make not hard up the condition lighter, also can exert an influence to the machining precision of work piece, thereby be unfavorable for going on of work piece processing work.

Disclosure of Invention

In order to solve the problem that the workpiece is easy to loosen in the machining process due to the lack of a locking mechanism in the clamping process of the machine tool clamp and achieve the purpose of self-locking in the clamping process of the clamp, the invention is realized by the following technical scheme: a machine tool fixture capable of realizing internal self-locking and avoiding looseness during clamping comprises a workbench, a placing seat arranged at the top of the workbench, a screw rod arranged inside the workbench and two clamping blocks arranged outside the screw rod, wherein a gear is arranged on the inner side surface of the workbench, a ratchet wheel is arranged outside the gear, a limiting rod is arranged on the inner side surface of the workbench, a first spring is arranged at the bottom of the limiting rod, a pull rope is arranged at the bottom of the limiting rod, a connecting block is arranged at the bottom of the pull rope, an elastic rope is arranged outside the connecting block, a traction ball is arranged outside the elastic rope, an insertion groove is formed in the inner side surface of each clamping block, an insertion rod is connected to the inner side surface of the insertion groove in a sliding manner, a clamping plate is arranged outside the insertion rod, a pull rod is connected to the inner side surface of each clamping block in a sliding manner, a connecting rod is arranged outside the pull rod, the outside of connecting rod is provided with the dead lever, the outside of dead lever is provided with the second spring, the surface of grafting pole has seted up the fixed orifices.

Furthermore, the gear is meshed with the outer surface of the screw rod, so that the screw rod and the gear can synchronously rotate, the positions of the clamping blocks correspond to the gear, collision between the clamping blocks and the gear can be avoided even if the clamping blocks rotate to the extreme positions, the screw rod is a double-thread screw, and the two clamping blocks are symmetrically distributed at the left end and the right end of the screw rod.

Furthermore, the position and the specification of the limiting rod are matched with the ratchet wheel, so that the limiting rod only allows the ratchet wheel to rotate in a single direction, the single-direction rotation direction of the ratchet wheel is the clamping moving direction of the clamping block, the limiting rod is connected with the inner side face of the workbench in a sliding mode, the first spring is fixedly connected with the inner side face of the workbench, and the pull rope is connected with the inner side face of the workbench in a sliding mode.

Furthermore, the top of connecting block is seted up flutedly for the connecting block removes the in-process and can not exert an influence to the normal work of stay cord, the elastic cord and the quantity of drawing the ball is two sets of and both ends about the connecting block just equal symmetric distribution.

Further, the shape, the specification of inserted bar all with the inserting groove phase-match, the one end shape that the grip block was kept away from to the inserted bar is the sphere form for the inserted bar can extrude with the dead lever through the sphere face at the grafting in-process, makes the dead lever can remove the inside that gets into the grip block, thereby the inside at the inserting groove can be pegged graft smoothly to the inserted bar, the dead lever is close to the one end surface of inserted bar and is provided with the fillet, can cooperate with the inserted bar of sphere form, makes the inside that the inserted bar can smoothly peg graft completely and get into the inserting groove.

Furthermore, the position and the specification of the fixing hole are matched with the fixing rods, the number of the fixing rods is two, the fixing rods are symmetrically distributed at the upper end and the lower end of the clamping block, and the second spring is arranged between the two fixing rods.

Furthermore, the left end and the right end of the connecting rod are respectively connected with the fixed rod and the pull rod in a rotating mode.

The invention provides a machine tool clamp which is self-locked inside and avoids looseness during clamping. The method has the following beneficial effects:

1. this slack lathe anchor clamps when centre gripping is avoided in inside auto-lock, through gear and screw rod meshing design, make the gear can carry out synchronous rotation along with the screw rod, mutually support through between ratchet and the gag lever post, can restrict the antiport of gear, make the gear can only unidirectional rotation, thereby the screw rod can only unidirectional rotation drive grip block press from both sides tightly the work piece, can carry out the auto-lock to the screw rod in the work piece centre gripping process, it leads to the work piece to appear not hard up condition to take place easily to have avoided the work piece to set up locking mechanism at the centre gripping process screw rod, thereby the going on of work piece normal machining work has been guaranteed, also make the machining precision of work piece can improve to some extent simultaneously.

2. This slack lathe anchor clamps when centre gripping is avoided in inside auto-lock, design through the grip block, can prevent that the grip block from appearing violent wearing and tearing in the use and need changing the condition emergence that leads to the wasting of resources, simultaneously through the pulling pull rod, make under the transmission action of connecting rod, the inside that the fixed orifices can be followed to the dead lever withdraws from, make the removal of inserted link no longer restricted, thereby can conveniently take off the grip block and change, through mutually supporting between dead lever and the fixed orifices, can stabilize fixedly to it after the grip block installation, thereby not only can reduce the cost that the lathe used, it is all comparatively convenient and stability in the use is better still to make the installation of grip block change simultaneously, can not exert an influence to the stability of work piece.

Drawings

FIG. 1 is a schematic view of the present invention in partial cross section;

FIG. 2 is an enlarged view of the structure at A in FIG. 1 according to the present invention;

FIG. 3 is an enlarged view of the structure at B in FIG. 1 according to the present invention;

FIG. 4 is a schematic view of the internal structure of the clamping block of the present invention;

FIG. 5 is an enlarged view of the structure of FIG. 4 at C according to the present invention.

In the figure: 1. a work table; 2. a placing seat; 3. a screw; 4. a clamping block; 5. a gear; 6. a ratchet wheel; 7. a limiting rod; 8. a first spring; 9. pulling a rope; 10. connecting blocks; 11. an elastic cord; 12. a traction ball; 13. inserting grooves; 14. a plug rod; 15. a clamping plate; 16. a pull rod; 17. a connecting rod; 18. fixing the rod; 19. a second spring; 20. and (7) fixing holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the loose machine tool clamp during the clamping is avoided in the internal self-locking mode is as follows:

please refer to fig. 1-5, a machine tool fixture with internal self-locking for avoiding slack during clamping, comprising a workbench 1, a placing seat 2 arranged at the top of the workbench 1, a screw rod 3 arranged inside the workbench 1 and two clamping blocks 4 arranged outside the screw rod 3, wherein a gear 5 is arranged on the inner side surface of the workbench 1, the gear 5 is meshed with the outer surface of the screw rod 3, so that the screw rod 3 and the gear 5 can rotate synchronously, the positions of the clamping blocks 4 correspond to the gear 5, so that the clamping blocks 4 can not collide with the gear 5 even if rotating to the extreme positions, the screw rod 3 is a double-threaded rod, and the two clamping blocks 4 are symmetrically distributed at the left end and the right end of the screw rod 3.

Gear 5's outside is provided with ratchet 6, the medial surface of workstation 1 is provided with gag lever post 7, the bottom of gag lever post 7 is provided with first spring 8, the bottom of gag lever post 7 is provided with stay cord 9, gag lever post 7's position, the specification all with ratchet 6 phase-match, make gag lever post 7 only allow 6 unidirectional rotation of ratchet, and ratchet 6's unidirectional rotation direction is grip block 4's centre gripping moving direction, gag lever post 7 and workstation 1's medial surface sliding connection, first spring 8 and workstation 1's medial surface fixed connection, stay cord 9 and workstation 1's medial surface sliding connection.

The bottom of stay cord 9 is provided with connecting block 10, and the outside of connecting block 10 is provided with stretch cord 11, and the outside of stretch cord 11 is provided with pulls ball 12, and the top of connecting block 10 is seted up flutedly for connecting block 10 removes the in-process and can not exert an influence to the normal work of stay cord 9, and stretch cord 11 and the quantity of pulling ball 12 are two sets of and equal symmetric distribution both ends about connecting block 10.

The inner side surface of the clamping block 4 is provided with an insertion groove 13, the inner side surface of the insertion groove 13 is connected with an insertion rod 14 in a sliding manner, the outer part of the insertion rod 14 is provided with a clamping plate 15, the inner side surface of the clamping block 4 is connected with a pull rod 16 in a sliding manner, the outer part of the pull rod 16 is provided with a connecting rod 17, the outer part of the connecting rod 17 is provided with a fixing rod 18, the left end and the right end of the connecting rod 17 are respectively connected with the fixing rod 18 and the pull rod 16 in a rotating manner, the shape and the specification of the insertion rod 14 are matched with those of the insertion groove 13, the shape of one end of the insertion rod 14 far away from the clamping plate 15 is spherical, so that the insertion rod 14 can be extruded with the fixing rod 18 through the spherical surface in the insertion process, the fixing rod 18 can move into the clamping block 4, the insertion rod 14 can be smoothly inserted into the insertion groove 13, the surface of one end of the fixing rod 18 near the insertion rod 14 is provided with a round angle, and can be matched with the spherical insertion rod 14, so that the plugging rod 14 can be smoothly and completely plugged into the interior of the plugging slot 13.

The outside of dead lever 18 is provided with second spring 19, and fixed orifices 20 have been seted up to the surface of bayonet joint pole 14, and the position, the specification of fixed orifices 20 all match with dead lever 18, and the quantity of dead lever 18 is two and equal symmetric distribution at the inside upper and lower both ends of grip block 4, and second spring 19 sets up between two dead levers 18.

In the use process, when a workpiece is clamped, an operator manually rotates the screw rod 3 to enable the clamping block 4 to move and drive the clamping plate 15 to move to clamp the workpiece, the screw rod 3 rotates to drive the gear 5 to rotate, the gear 5 rotates to drive the ratchet 6 to rotate, the limiting rod 7 only allows the ratchet 6 to rotate in one direction, the one-way rotation direction is consistent with the clamping direction of the clamping block 4, so that the rotation of the screw rod 3 is not influenced in the clamping process, the workpiece can be clamped by normal rotation, after the workpiece is clamped, under the limiting action of the limiting rod 7, the ratchet 6 cannot rotate in the reverse direction and limits the reverse rotation of the gear 5, the gear 5 cannot enable the rotating screw rod 3 to rotate, and therefore, self-locking can be carried out in the workpiece clamping process to limit the reverse movement of the clamping plate 15, and the clamping plate 15 can stably clamp and fix the workpiece, the situation that the workpiece is easy to loosen due to the fact that the screw rod 3 is not provided with a locking mechanism in the clamping process of the workpiece is avoided, normal machining work of the workpiece is guaranteed, and meanwhile machining precision of the workpiece can be improved in a phase-changing manner;

when the screw 3 needs to be rotated reversely to loosen the clamping of the workpiece, an operator manually pulls the traction ball 12 and pulls the elastic rope 11, and the elastic rope 11 drives the limiting rod 7 to move when pulled so that the limiting rod 7 moves to be separated from the ratchet wheel 6, so that the reverse rotation of the ratchet wheel 6 is not limited any more, and the operator can rotate the screw 3 reversely to drive the clamping block 4 to move reversely to loosen the clamping of the workpiece;

through the design of the clamping plate 15, the clamping block 4 can be prevented from rubbing the surface of the workpiece when clamping and fixing the workpiece, so that the workpiece is easy to wear seriously, and the whole workpiece needs to be replaced, thereby reducing the use cost of the machine tool, when the clamping plate 15 needs to be replaced, an operator manually pulls the pull rod 16, under the transmission action of the connecting rod 17, the pull rod 16 moves to drive the fixed rod 18 to move, the fixed rod 18 withdraws from the inside of the fixed hole 20 and compresses the second spring 19 in the moving process, at the moment, the fixed rod 18 does not mutually match with the fixed hole 20 to limit the movement of the inserting and connecting rod 14, at the moment, the operator can manually pull the clamping plate 15 to withdraw the inserting and connecting rod 14 from the inside of the inserting and connecting groove 13, so as to finish the disassembly of the clamping plate 15, then the operator inserts the inserting and connecting rod 14 on a new clamping plate 15 into the inside of the inserting and connecting groove 13 and loosens the pull rod 16, under the action of the resilience force of the second spring 19, the fixing rod 18 moves reversely to continue to be inserted into the fixing hole 20, so that the clamping plate 15 can be replaced, and the detaching and replacing process of the clamping plate 15 is simple and convenient.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a machine tool fixture of slack when centre gripping is avoided in inside auto-lock, includes workstation (1), sets up placing seat (2) at workstation (1) top, sets up screw rod (3) inside workstation (1) and sets up two grip blocks (4) in screw rod (3) outside, its characterized in that: a gear (5) is arranged on the inner side surface of the workbench (1), a ratchet wheel (6) is arranged outside the gear (5), a limiting rod (7) is arranged on the inner side surface of the workbench (1), a first spring (8) is arranged at the bottom of the limiting rod (7), a pull rope (9) is arranged at the bottom of the limiting rod (7), a connecting block (10) is arranged at the bottom of the pull rope (9), an elastic rope (11) is arranged outside the connecting block (10), a traction ball (12) is arranged outside the elastic rope (11), an insertion groove (13) is formed in the inner side surface of the clamping block (4), an insertion rod (14) is slidably connected to the inner side surface of the insertion groove (13), a clamping plate (15) is arranged outside the insertion rod (14), a pull rod (16) is slidably connected to the inner side surface of the clamping block (4), and a connecting rod (17) is arranged outside the pull rod (16), a fixing rod (18) is arranged outside the connecting rod (17), a second spring (19) is arranged outside the fixing rod (18), and a fixing hole (20) is formed in the outer surface of the inserting rod (14).

2. The machine tool fixture of claim 1, wherein the internal self-locking avoids loosening during clamping, and is characterized in that: the gear (5) is meshed with the outer surface of the screw (3), the clamping blocks (4) are arranged corresponding to the gear (5), the screw (3) is a double-threaded rod, and the two clamping blocks (4) are symmetrically distributed at the left end and the right end of the screw (3).

3. The machine tool fixture of claim 1, wherein the internal self-locking avoids loosening during clamping, and is characterized in that: the position and the specification of the limiting rod (7) are matched with the ratchet wheel (6), the limiting rod (7) is connected with the inner side face of the workbench (1) in a sliding mode, the first spring (8) is fixedly connected with the inner side face of the workbench (1), and the pull rope (9) is connected with the inner side face of the workbench (1) in a sliding mode.

4. The machine tool fixture of claim 1, wherein the internal self-locking avoids loosening during clamping, and is characterized in that: the top of the connecting block (10) is provided with a groove, and the elastic ropes (11) and the traction balls (12) are respectively two groups and are symmetrically distributed at the left end and the right end of the connecting block (10).

5. The machine tool fixture of claim 1, wherein the internal self-locking avoids loosening during clamping, and is characterized in that: the shape and the specification of the insertion rod (14) are matched with the insertion groove (13), the end, far away from the clamping plate (15), of the insertion rod (14) is spherical, and a round angle is arranged on the surface of one end, close to the insertion rod (14), of the fixed rod (18).

6. The machine tool fixture of claim 1, wherein the internal self-locking avoids loosening during clamping, and is characterized in that: the position and the specification of the fixing hole (20) are matched with the fixing rods (18), the number of the fixing rods (18) is two, the fixing rods are symmetrically distributed at the upper end and the lower end of the interior of the clamping block (4), and the second spring (19) is arranged between the two fixing rods (18).

7. The machine tool fixture of claim 1, wherein the internal self-locking avoids loosening during clamping, and is characterized in that: the left end and the right end of the connecting rod (17) are respectively connected with the fixed rod (18) and the pull rod (16) in a rotating mode.