CN211361479U

CN211361479U - Machine tool clamp

Info

Publication number: CN211361479U
Application number: CN201921863221.6U
Authority: CN
Inventors: 陆文益; 陆国凤; 陆茜
Original assignee: Zhangjiagang Tuo Sheng Machinery Technology Co ltd
Current assignee: Zhangjiagang Tuo Sheng Machinery Technology Co ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-08-28
Anticipated expiration: 2029-10-31

Abstract

The utility model discloses a machine tool fixture for press from both sides tight work piece, it includes the bottom plate, can be along two clamping jaws that are close to each other or the direction motion of keeping away from, be used for driving the actuating mechanism of two clamping jaw motions, foretell machine tool fixture still includes that slidable locates at least one first fixed block on the bottom plate, sets up the eccentric groove on first fixed block, and at least one mobilizable among two clamping jaws is located in the eccentric groove. The utility model discloses a machine tool fixture through the setting of eccentric grove for the clamping jaw can be in the appropriate activity of eccentric inslot, and during the irregular work piece of centre gripping, the clamping jaw can properly deflect according to the shape of work piece, utilizes eccentric principle to make the clamping jaw can be all the time with work piece in close contact with, has improved the centre gripping fastness of clamping jaw, has avoided influencing subsequent processingquality because of the work piece is not hard up.

Description

Machine tool clamp

Technical Field

The utility model relates to a machine tool fixture.

Background

A machine tool, which is an apparatus for processing machine parts, generally includes a tool holder and a spindle on which a tool is mounted while the tool holder holds a workpiece, and processes the held workpiece by moving and rotating the tool. Whether the clamp can clamp the workpiece or not in the whole machining process of the machine tool is the key of the machining quality of the workpiece.

At present, an existing machine tool clamp can only clamp workpieces in regular shapes generally, and for workpieces in irregular shapes, the existing machine tool clamp cannot guarantee that the existing machine tool clamp can be always in close contact with the workpieces, so that the workpieces cannot be effectively clamped, and machining quality is possibly affected due to loosening of the workpieces in a subsequent machining process.

Disclosure of Invention

The utility model aims at overcoming prior art's not enough, providing a machine tool fixture, this machine tool fixture can be according to the eccentricity of the shape adjustment clamping jaw of work piece, make the work piece can all the time with anchor clamps in close contact with and press from both sides tightly, avoided influencing subsequent processingquality because of the work piece is not hard up.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

the utility model provides a machine tool fixture for press from both sides tight work piece, it includes the bottom plate, can be along two clamping jaws that the direction motion that is close to each other or keeps away from, be used for the drive the actuating mechanism of two clamping jaw movements, machine tool fixture still includes slidable locates at least one first fixed block on the bottom plate, set up in eccentric groove on the first fixed block, at least one mobilizable the locating in two clamping jaws in the eccentric groove.

Preferably, the machine tool fixture further comprises a fixed shaft arranged in the eccentric groove, and the clamping jaw in the eccentric groove is movably sleeved on the fixed shaft.

Preferably, the two clamping jaws comprise a first clamping jaw and a second clamping jaw which are arranged up and down, the first clamping jaw is movably arranged in the eccentric groove, and the second clamping jaw is slidably arranged on the bottom plate.

Further preferably, the machine tool fixture further includes a transmission mechanism disposed on the bottom plate, the transmission mechanism includes a first rack slidably disposed on the bottom plate and connected to the first fixing block, a second rack slidably disposed on the bottom plate and connected to the second clamping jaw, and a gear rotatably disposed and engaged with the first rack and the second rack, respectively, and the driving mechanism is configured to drive one of the first rack and the second rack to move.

Still further preferably, the first rack and the second rack are located on opposite sides of the gear, respectively.

Still more preferably, the driving mechanism is a power cylinder, a cylinder body of the power cylinder is fixed on the bottom plate, and a piston rod is connected to one of the first rack and the second rack.

Still further preferably, the machine tool clamp further includes a second fixed block provided on one of the first rack and the second rack, and the piston rod is connected to the second fixed block through a joint bearing.

Preferably, the machine tool fixture further comprises two screw rod adjusting mechanisms arranged on the bottom plate and used for controlling the two clamping jaws to lift.

Preferably, the surface of one side of the two clamping jaws, which is close to each other, is provided with a clamping groove for clamping the workpiece, and the inner wall of the clamping groove is serrated.

Preferably, the machine tool fixture further comprises two dust guard plates which are arranged on the bottom plate and located on two sides perpendicular to the moving direction of the first clamping jaw and the second clamping jaw.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage: the utility model discloses a machine tool fixture through the setting of eccentric grove for the clamping jaw can be in the appropriate activity of eccentric inslot, and during the irregular work piece of centre gripping, the clamping jaw can properly deflect according to the shape of work piece, utilizes eccentric principle to make the clamping jaw can be all the time with work piece in close contact with, has improved the centre gripping fastness of clamping jaw, has avoided influencing subsequent processingquality because of the work piece is not hard up.

Drawings

FIG. 1 is a schematic side view of the present invention;

FIG. 2 is a schematic front view of the structure of the present invention;

fig. 3 is a schematic top view of the present invention.

Wherein: 1. a base plate; 2. a clamping jaw; 21. a first jaw; 22. a second jaw; 23. a clamping groove; 3. a drive mechanism; 31. a cylinder body; 32. a piston rod; 4. a first fixed block; 5. an eccentric groove; 6. a fixed shaft; 7. a transmission mechanism; 71. a first rack; 72. a second rack; 73. a gear; 8. a second fixed block; 9. a knuckle bearing; 10. a screw rod adjusting mechanism; 11. a dust-proof plate;

100. and (5) a workpiece.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings.

Referring to fig. 1 to 3, a machine tool clamp for clamping a workpiece 100 includes a base plate 1, two clamping jaws 2 capable of moving in directions approaching to or away from each other, a driving mechanism 3 for driving the two clamping jaws 2 to move, at least one first fixed block 4 slidably disposed on the base plate 1, an eccentric slot 5 disposed on the first fixed block 4, and at least one of the two clamping jaws 2 movably disposed in the eccentric slot 5. Meanwhile, the machine tool fixture further comprises a fixed shaft 6 arranged in the eccentric groove 5, and the clamping jaw 2 positioned in the eccentric groove 5 is movably sleeved on the fixed shaft 6. Here, through locating the cover of clamping jaw 2 activity on fixed axle 6, when the anomalous work piece 100 of anchor clamps needs centre gripping, through the setting of eccentric grove 5, can make clamping jaw 2 suitably move about in eccentric grove 5 to properly deflect according to the shape of work piece 100, utilize eccentric principle to make clamping jaw 2 can be all the time with work piece 100 in close contact with, improved the centre gripping fastness of clamping jaw 2, avoided influencing subsequent processingquality because of work piece 100 is not hard up.

In this embodiment, the two jaws 2 include a first jaw 21 and a second jaw 22 disposed up and down, the first jaw 21 is movably disposed in the eccentric slot 5, and the second jaw 22 is slidably disposed on the bottom plate 1. Wherein the first clamping jaw 21 is an eccentric jaw adapted to the shape of the workpiece 100, and the second clamping jaw 22 is a fixed jaw for ensuring the clamping force of the clamp. Here, the bottom plate 1 is provided with a sliding groove, the first fixing block 4 and the fixing claws are provided with sliding blocks, and the sliding blocks are embedded in the sliding groove.

The machine tool fixture further comprises a transmission mechanism 7 arranged on the bottom plate 1, wherein the transmission mechanism 7 comprises a first rack 71 slidably arranged on the bottom plate 1 and connected with the first fixing block 4, a second rack 72 slidably arranged on the bottom plate 1 and connected with the second clamping jaw 22, a gear 73 rotatably arranged and respectively meshed with the first rack 71 and the second rack 72, and a driving mechanism 3 for driving one of the first rack 71 and the second rack 72 to move. The bottom plate 1 is provided with a sliding groove, and the first rack 71 and the second rack 72 are respectively provided with a sliding block which is embedded in the sliding groove.

One of the first rack 71 and the second rack 72 is driven to move by the driving mechanism 3, and the other rack is driven to move by the transmission action of the gear and the rack. And because the first rack 71 and the second rack 72 are respectively positioned at two opposite sides of the gear 73, when the gear 73 rotates, the first rack 71 and the second rack 72 can move towards opposite directions, so that the first clamping jaw 21 and the second clamping jaw 22 can move close to and away from each other. The first rack 71 is a toothed plate with tooth surfaces on two sides, the number of the gears is four, every two gears are distributed on two sides of the toothed plate, and the gear shaft is rotatably sleeved with the gears through bearings. The second rack 72 has two teeth, and the tooth surfaces of the tooth plates are located at two opposite sides of the gear. Wherein the first fixing block 4 is fixedly arranged on the toothed plate, and the second clamping jaw 22 is connected with the second toothed bar 72 through the seat plate.

In this embodiment, the above-mentioned jig further includes two positioning pins provided on the base plate 1 for positioning the position and the extending direction of the second rack 72, and the two positioning pins are located at both ends of the extending direction of the second rack 72.

In the present embodiment, the driving mechanism 3 is a power cylinder, the cylinder body 31 of the power cylinder is fixed to the base plate 1, and the piston rod 32 is connected to one of the first rack 71 and the second rack 72. The above-described jig for a machine tool further includes a second fixed block 8 provided on one of the first rack 71 and the second rack 72, and the piston rod 32 is connected to the second fixed block 8 through the joint bearing 9. Here, the second fixing block 8 is provided on the first rack, and the cylinder body 31 of the power cylinder is fixed to the base plate 1 through the power cylinder fixing plate.

The machine tool fixture further comprises two screw rod adjusting mechanisms 10 which are arranged on the bottom plate 1 and are respectively used for controlling the two clamping jaws 2 to lift. The screw rod adjusting mechanism 10 is a screw and a nut which are in threaded connection, wherein the nut is fixed on the bottom plate, the screw is connected on the clamping jaw 2, the clamping jaw 2 is driven to move by rotating the screw, the fine adjustment of the distance between the two clamping jaws 2 is realized, and the clamp can better clamp the workpiece 100. Here, through screwed connection clamping jaw 2, when needs are changed different anchor clamps, can be convenient dismantle the screw and change anchor clamps, simple and convenient.

In the present embodiment, the side surface of the two jaws 2 close to each other has a clamping groove 23 for clamping the workpiece 100, and the inner wall of the clamping groove 23 is serrated. The serrated clamp groove 23 makes the clamped workpiece 100 less prone to movement, further improving the clamping robustness.

The machine tool fixture further comprises two dust-proof plates 11 which are arranged on the bottom plate 1 and are positioned on two sides vertical to the moving direction of the first clamping jaw 21 and the second clamping jaw 22. The dust guard 11 can prevent effectively that dust and water from getting into the processing that influences the work piece in the anchor clamps.

The following specifically explains the working process of this embodiment: when the workpiece 100 needs to be clamped, the driving mechanism 3 operates, the piston rod 32 extends out to drive the first rack 71 to move upwards, the first rack 71 drives the gear 73 to rotate, the gear 73 drives the second rack 72 to move downwards, and the first clamping jaw 21 and the second clamping jaw 22 are driven to be away from each other, so that the clamp is opened;

after the workpiece 100 is placed into the clamp, the piston rod 32 contracts to drive the first rack 71 to move downwards, the first rack 71 drives the gear 73 to rotate, the gear 73 drives the second rack 72 to move upwards to drive the first clamping jaw 21 and the second clamping jaw 22 to approach each other, so that the clamp is closed and clamped, the first clamping jaw 21 can automatically and eccentrically adjust according to the workpiece 100 and freely deflect in the eccentric groove 5 to adapt to the shape of the workpiece 100, and the workpiece 100 is ensured to be clamped.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot 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 by the protection scope of the present invention.

Claims

1. A machine tool clamp for clamping a workpiece (100), comprising a base plate (1), two jaws (2) movable in directions towards and away from each other, a drive mechanism (3) for driving said jaws (2) in motion, characterized in that: the machine tool fixture further comprises at least one first fixing block (4) arranged on the bottom plate (1) in a sliding mode, an eccentric groove (5) formed in the first fixing block (4), and at least one of the two clamping jaws (2) is movably arranged in the eccentric groove (5).

2. A machine tool holder according to claim 1 wherein: the machine tool fixture further comprises a fixed shaft (6) arranged in the eccentric groove (5), and the clamping jaw (2) in the eccentric groove (5) is movably sleeved on the fixed shaft (6).

3. A machine tool holder according to claim 1 wherein: two clamping jaws (2) including first clamping jaw (21) and second clamping jaw (22) that set up from top to bottom, first clamping jaw (21) mobilizable locate in eccentric groove (5), second clamping jaw (22) slidable locate on bottom plate (1).

4. A machine tool holder according to claim 3 wherein: the machine tool fixture further comprises a transmission mechanism (7) arranged on the bottom plate (1), the transmission mechanism (7) comprises a first rack (71) which is slidably arranged on the bottom plate (1) and connected with the first fixing block (4), a second rack (72) which is slidably arranged on the bottom plate (1) and connected with the second clamping jaw (22), and a gear (73) which is rotatably arranged and meshed with the first rack (71) and the second rack (72) respectively, and the driving mechanism (3) is used for driving one of the first rack (71) and the second rack (72) to move.

5. A machine tool holder according to claim 4 wherein: the first rack (71) and the second rack (72) are respectively positioned on two opposite sides of the gear (73).

6. A machine tool holder according to claim 4 wherein: the driving mechanism (3) is a power cylinder, a cylinder body (31) of the power cylinder is fixed on the bottom plate (1), and a piston rod (32) is connected to one of the first rack (71) and the second rack (72).

7. A machine tool holder according to claim 6 wherein: the machine tool fixture further comprises a second fixing block (8) arranged on one of the first rack (71) and the second rack (72), and the piston rod (32) is connected to the second fixing block (8) through a joint bearing (9).

8. A machine tool holder according to claim 1 wherein: the machine tool fixture further comprises two screw rod adjusting mechanisms (10) which are arranged on the bottom plate (1) and are respectively used for controlling the two clamping jaws (2) to ascend and descend.

9. A machine tool holder according to claim 1 wherein: the surface of one side, close to each other, of the two clamping jaws (2) is provided with a clamping groove (23) for clamping the workpiece (100), and the inner wall of the clamping groove (23) is in a sawtooth shape.

10. A machine tool holder according to claim 3 wherein: the machine tool fixture further comprises two dust-proof plates (11) which are arranged on the bottom plate (1) and are positioned on two sides perpendicular to the moving directions of the first clamping jaw (21) and the second clamping jaw (22).