CN114178566A - Novel hollow three-jaw chuck - Google Patents

Abstract

The utility model relates to a novel cavity three-jaw chuck, including disc seat and three jack catch, can dismantle on the jack catch and be connected with the movable block, the jack catch passes through the movable block along disc seat's radial direction sliding connection on disc seat, sliding connection has the movable block on the disc seat, be fixed with three drive pieces on the movable block, the drive piece includes bottom block and two side pieces, and two side pieces are located the both sides that correspond the movable block respectively, be equipped with the oblique strip piece that is the slope setting on one side of side piece orientation movable block, the movable block is fixed with the fixed block respectively towards the both sides side of two drive pieces, set up the chute that matches with the oblique strip piece on the one side of fixed block orientation corresponding side piece, oblique strip piece sliding connection is on the chute. Through changing the application of force point on the movable block, move the stress point orientation of chuck away from movable block one side, alternate lever point like this, can reduce the degree that the jack catch upwarped when the circular work piece of jack catch centre gripping.

Description

Novel hollow three-jaw chuck

Technical Field

The application relates to the field of three-jaw chucks, in particular to a novel hollow three-jaw chuck.

Background

The three-jaw chuck is a machine tool accessory which clamps and positions a workpiece by utilizing the radial movement of three movable jaws uniformly distributed on a chuck body.

A three-jaw chuck in the related art is shown in fig. 1, and includes a disc seat 1 and three jaws 13, a moving block 14 is disposed on the jaws 13, the jaws 13 are slidably connected to the disc seat 1 along a radial direction of the disc seat 1 through the moving block 14, a moving block 11 is slidably connected to a center of the disc seat 1 along an axis direction parallel to the disc seat 1, the moving block 11 can be driven by an external oil cylinder, three first inclined planes 181 are sequentially disposed on an outer wall of the moving block 11 along a circumferential direction, the three moving blocks 14 respectively correspond to the three first inclined planes 181, a second inclined plane 182 which is the same as and matched with an inclined direction of the first inclined plane 181 is disposed on a side surface of the three moving blocks 14 facing the first inclined plane 181, the moving block 11 is slidably connected to the moving block 14 along an inclined direction of the second inclined plane 182, and the first inclined plane 181 is always attached to the second inclined plane 182.

An operator fixes a piston rod of the external oil cylinder on the movable block, the movable block is driven by the oil cylinder to slide along the axis direction parallel to the disc seat, the movable block is driven by the cooperation of the first inclined plane and the second inclined plane to slide on the disc seat, and finally the three movable blocks drive the three clamping jaws to move towards the directions away from or approaching each other, so that the workpiece is clamped and loosened.

The above-mentioned related technical solutions have the following drawbacks: when a round workpiece is processed, the clamping jaws on the chuck slide towards the center of the chuck in the radial direction so as to clamp the round workpiece. Because when the circular work piece lateral wall of being centre gripping was irregular, when making the jack catch butt circular work piece lateral wall easily, with the axis deviation of circular work piece the axis of disc seat for the jack catch has the upwarp of certain degree, leads to the precision difference of jack catch centre gripping.

Disclosure of Invention

In order to improve the precision of jack catch centre gripping, this application provides a novel cavity three-jaw chuck.

The application provides a novel cavity three-jaw chuck adopts following technical scheme:

a novel hollow three-jaw chuck comprises a disk seat and three jaws, wherein the jaws are detachably connected with moving blocks, the clamping jaws are connected to the disc seat in a sliding manner along the radial direction of the disc seat through the moving block, the center of the disc seat is connected with the movable block in a sliding manner along the direction parallel to the axis of the disc seat, the movable block is surrounded by the three clamping jaws together, the moving blocks are positioned under the clamping jaws, three driving blocks are fixed on the moving blocks and respectively correspond to the three moving blocks one by one, the driving block is arranged in a U shape, two ends of the driving block are respectively positioned at two sides of the corresponding moving block, the side surface of one side of the driving block facing the moving block is provided with an oblique strip block which is obliquely arranged, the side surfaces of two sides of the moving block facing the driving block are respectively provided with an oblique groove matched with the oblique strip block, and the oblique strip block is slidably connected to the oblique groove along the oblique direction parallel to the oblique strip block.

By adopting the technical scheme, the movable block drives the three driving blocks to slide on the disc seat by applying force on the movable block, the driving blocks move to drive the moving block to slide on the disc seat through the matching of the oblique strip block and the oblique groove, and finally the moving block drives the clamping jaws to slide on the disc seat to control the clamping and loosening of the clamping jaws on the circular workpiece. Compare in the chuck among the correlation technique, through changing the application of force point on the movable block, move the stress point orientation of chuck and keep away from movable block one side, alternate lever point like this, can reduce the degree that the jack catch upwarped when the circular work piece of jack catch centre gripping.

Preferably, the clamping jaw is provided with a plurality of bolts, and one end of each bolt penetrates through the clamping jaw and is in threaded connection with the moving block.

Through adopting above-mentioned technical scheme, through the realization that the bolt can be convenient fixed and the dismantlement of jack catch and movable block, can make things convenient for the dismouting of jack catch on the movable block.

Preferably, a first tooth surface is formed on one side surface, facing the moving block, of each jaw, a second tooth surface is formed on one side surface, facing the jaws, of the moving block, the length directions of the first tooth surface and the second tooth surface are parallel to the sliding direction of the corresponding jaws and the moving block on the disc seat, and the first tooth surface is connected to the second tooth surface in a meshed mode.

Through adopting above-mentioned technical scheme, when the jack catch centre gripping work piece, the cooperation of first flank of tooth and second flank of tooth can reduce the probability that takes place the displacement between jack catch and the movable block.

Preferably, a limiting groove is formed in the side face, away from the clamping jaw, of the moving block, a limiting block is arranged on the disc seat, one end of the limiting block is always located in the limiting groove, and the length direction of the limiting groove is parallel to the moving direction of the corresponding moving block.

By adopting the technical scheme, when the clamping jaws fly out towards one side far away from the workpiece under the action of external force, the limiting blocks can abut against the inner wall of the limiting groove to limit the movement of the moving block, and the probability that the clamping jaws fly out of the disc seat is reduced.

Preferably, be equipped with a plurality of oiling valves on the disc seat, a plurality of first flow ways have been seted up on the disc seat, a plurality of first flow ways respectively with a plurality of oiling valve one-to-ones, the lubricated slide of annular has been seted up along the circumference direction that drives a tip on the lateral mass outer wall, a plurality of first flow ways respectively with a plurality of annular lubrication way one-to-ones, the vertical lubricated slide that is linked together with the lubricated way of annular is seted up along the axis direction that is on a parallel with the disc seat to the lateral mass outer wall, the one end intercommunication oiling valve of first flow way, the other end of first flow way is located the removal route of the lubricated slide of annular, when driving the piece and removing to the lubricated way of annular and just keeping away from the tip of oiling valve to first flow way, the lubricated slide of first flow way intercommunication annular.

By adopting the technical scheme, an operator injects lubricating oil into the oil filling valve, when a round workpiece is clamped or loosened, the driving block can move along with the movement of the movable block, in the moving process, the annular lubricating slide on the movable block can move to the end part, far away from the oil filling valve, of the first flow channel, then the lubricating oil can flow to the annular lubricating slide along with the first flow channel and then flow to the vertical lubricating slide along with the annular lubricating slide, and therefore the movable block is lubricated; meanwhile, when the annular lubricating channel on the moving block is not aligned with the end part of the first flow channel far away from the oiling valve in the moving process, lubricating oil in the first flow channel can be coated on the outer wall of the moving block along the movement of the moving block, and a certain lubricating effect can be achieved.

Preferably, the second runner has been seted up on the side piece, the third runner has been seted up on the sloping piece, and the both sides side of making the sloping piece is the inclined plane, the incline direction on inclined plane is on a parallel with the incline direction of sloping piece, the both ends of third runner communicate two inclined planes of sloping piece respectively, the both ends of second runner communicate annular moist slide and third runner respectively.

Through adopting above-mentioned technical scheme, after lubricating oil got into the annular lubrication way, lubricating oil can get into second runner and third runner in proper order, flows out on two inclined planes of tapered strip piece at last to lubricate tapered strip piece and chute, thereby improve the movable block and drive the cooperation smoothness between the piece, make the better work piece of jack catch carry out the centre gripping.

Preferably, when the driving block moves to the end part of the annular lubricating passage opposite to the first flow passage far away from the oil filling valve, the first flow passage is simultaneously directly communicated with the second flow passage.

Through adopting above-mentioned technical scheme, in lubricating oil in the first runner can directly flow to second runner and the moist slide of annular, need not flow to the second runner through the moist slide of annular again, can improve the scope that lubricated liquid flows in the same time, more quick lubricated effect that reaches.

Preferably, the side surface of the fixed block, which faces the clamping jaw, and the side surface of the fixed block, which is away from the clamping jaw, are respectively provided with a seepage channel, the moving block is provided with a communication channel, two ends of the communication channel are respectively communicated with the two seepage channels, and when the moving block and the driving block slide to each other until one of the seepage channels faces the end part of the third flow channel, the corresponding seepage channel is communicated with the third flow channel.

Through adopting above-mentioned technical scheme, along with the movable block with drive the sliding of mutually supporting between the piece, lubricating oil in the third runner can flow to the inclined plane on more than lubricating the inclined plane, still can flow to one of them infiltration runner in to can flow to another infiltration runner through the intercommunication way, thereby all lubricate the both sides side of movable block, can make the better sliding connection of movable block on the disc seat.

In summary, the present application includes at least one of the following beneficial technical effects:

by arranging the oblique strip block for driving the block and the oblique groove for driving the moving block and changing the force application point on the moving block, the force application point of the chuck moves towards one side far away from the moving block, so that the lever point is changed, and the degree of upward warping of the clamping jaw can be reduced when the clamping jaw clamps a circular workpiece;

through setting up stopper and spacing groove, when the jack catch receives the exogenic action and keeps away from work piece one side departure, thereby the stopper can butt on the inner wall of spacing groove and restrict the removal of movable block, reduces the probability of jack catch departure disc seat.

Drawings

Fig. 1 is an overall structural diagram of the related art.

Fig. 2 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a jaw and a driving block according to an embodiment of the application.

Fig. 4 is a sectional view taken along line a-a of fig. 2.

Fig. 5 is a schematic diagram of a connection between a moving block and a moving block according to an embodiment of the present application.

FIG. 6 is a schematic structural view of a first flow passage and a fill valve in accordance with an embodiment of the present application.

FIG. 7 is a schematic structural diagram of a seepage flow passage and a third flow passage according to an embodiment of the present application.

Description of reference numerals: 1. a disc base; 11. a movable block; 12. driving the block; 121. a bottom block; 122. a side block; 1221. an annular lubrication channel; 1222. a second flow passage; 1223. a vertical lubrication way; 123. an oblique strip block; 1231. a third flow path; 1232. an inclined surface; 13. a claw; 131. a first tooth surface; 132. a bolt; 14. a moving block; 141. a second tooth surface; 142. a limiting groove; 15. a fixed block; 151. a chute; 152. a seepage channel; 153. a communicating channel; 16. a limiting block; 17. an oil filling valve; 171. a first flow passage; 181. a first inclined plane; 182. a second inclined plane.

Detailed Description

The present application is described in further detail below with reference to figures 2-7.

The embodiment of the application discloses a novel hollow three-jaw chuck.

Referring to fig. 2, fig. 3, the novel hollow three-jaw chuck of this embodiment includes disc seat 1 and three jack catch 13, disc seat 1 is the cylinder type setting, radial direction sliding connection along disc seat 1 is respectively on disc seat 1 for three jack catch 13, the length direction of jack catch 13 is on a parallel with the moving direction of jack catch 13, three jack catch 13 all is located one side of disc seat 1, jack catch 13 can dismantle towards one side of disc seat 1 and be connected with movable block 14, the length direction of movable block 14 is on a parallel with the length direction of jack catch 13, jack catch 13 is just setting up corresponding movable block 14, jack catch 13 passes through movable block 14 sliding connection on disc seat 1, three movable block 14 is respectively along the circumferential direction evenly distributed of disc seat 1 on disc seat 1.

Referring to fig. 2 and 4, a movable block 11 is slidably connected to the disc seat 1 along a direction parallel to the axis of the disc seat 1, the movable block 11 is coaxially arranged with the disc seat 1, and the movable block 11 is used for connecting a piston rod of an external oil cylinder in a threaded manner. One end of the movable block 11 is always positioned in the disc seat 1, and the other end of the movable block 11 can extend out of one side, far away from the clamping jaw 13, of the disc seat 1 in the sliding process.

An operator connects a piston rod of the oil cylinder to one end of the movable block 11, which can extend out of the disc seat 1, in a threaded manner, and the movable block 11 can be driven to move back and forth on the disc seat 1 by driving the piston rod of the oil cylinder to extend out and contract.

Referring to fig. 3 and 5, three driving blocks 12 are fixedly connected to the circumferential outer wall of the movable block 11, the three driving blocks 12 respectively correspond to the three moving blocks 14 one by one, the driving blocks 12 are U-shaped, each driving block 12 includes a bottom block 121 and two side blocks 122, one ends of the two side blocks 122 are respectively vertically and fixedly connected to the same side surface of the bottom block 121, and the two side blocks 122 are respectively located at two ends of the bottom block 121 in the length direction. The bottom block 121 is fixedly connected to the movable block 11, the two side blocks 122 are respectively located at two sides of the corresponding movable block 14 in the width direction, and the length direction of the side blocks 122 is parallel to the axial direction of the disc base 1. The side face, facing the moving block 14, of the side block 122 is fixedly connected with an oblique strip block 123, the oblique strip block 123 is arranged obliquely, the oblique directions of the two oblique strip blocks 123 are the same, and the distance between one end, facing the claw 13, of the oblique strip block 123 and the axis of the disc seat 1 is gradually increased. Fixed blocks 15 are fixedly connected to the side faces of the two sides of the width direction of the moving block 14 respectively, the length direction of the fixed blocks 15 is parallel to the length direction of the moving block 14, the two ends of the fixed blocks 15 are flush with the two ends of the moving block 14, a chute 151 matched with the oblique strip blocks 123 is formed in the side face, far away from the moving block 14, of one side of each fixed block 15, the chute 151 is located in the middle of the length direction of the fixed block 15, and the oblique strip blocks 123 can be connected to the chute 151 in a sliding mode in the oblique direction parallel to the oblique strip blocks 123.

The external oil cylinder drives the movable block 11 to move, so that the movable block 11 drives the three driving blocks 12 to slide on the disc seat 1, the driving blocks 12 move to drive the moving block 14 to slide on the disc seat 1 through the matching of the inclined strip blocks 123 and the inclined grooves 151, and finally the moving block 14 drives the clamping jaws 13 to slide on the disc seat 1 to control the clamping jaws 13 to clamp and loosen the circular workpiece.

Referring to fig. 3 and 4, two bolts 132 are arranged on the jaws 13, and one ends of the bolts 132 vertically penetrate through the jaws 13 from one side of the jaws 13 far away from the disc base 1 and are in threaded connection with the moving block 14. The side surface of the claw 13 facing the corresponding moving block 14 is provided with a first tooth surface 131, the length direction of the first tooth surface 131 is parallel to the length direction of the claw 13, the side surface of the moving block 14 facing the corresponding claw 13 is provided with a second tooth surface 141, the length direction of the second tooth surface 141 is parallel to the length direction of the moving block 14, and the first tooth surface 131 is meshed and connected with the second tooth surface 141. The engagement of the first tooth surface 131 and the second tooth surface 141 can reduce the probability of displacement between the dog 13 and the moving block 14 when the dog 13 grips a workpiece.

Referring to fig. 2 and 4, a limiting groove 142 is formed in the side surface of one side, away from the claw 13, of the moving block 14, the length direction of the limiting groove 142 is parallel to the length direction of the moving block 14, a limiting block 16 is detachably connected to the disc base 1, the limiting block 16 is connected to the disc base 1 in a threaded manner, the limiting block 16 is located on one side, away from the claw 13, of the moving block 14, and one end, facing the claw 13, of the limiting block 16 is located in the limiting groove 142 all the time.

When the claw 13 flies out towards the side far away from the clamped workpiece under the action of external force, the limiting block 16 can abut against the inner wall of the limiting groove 142 to limit the movement of the moving block 14, and the probability that the claw 13 flies out of the disc seat 1 is reduced.

Referring to fig. 2 and 6, three groups of oil filling valves 17 are fixedly mounted on the disc base 1, the three groups of oil filling valves 17 correspond to the three driving blocks 12 one by one, each group of oil filling valves 17 comprises two oil filling valves 17, the two oil filling valves 17 correspond to the two side blocks 122 on the corresponding driving blocks 12 one by one, and the two oil filling valves 17 are respectively located on two sides corresponding to the two side blocks 122. Six first flow passages 171 are formed in the disc seat 1, the six first flow passages 171 are in one-to-one correspondence with the six oil injection valves 17, and one ends of the first flow passages 171 are communicated with the corresponding oil injection valves 17.

Referring to fig. 5 and 6, an annular lubrication passage 1221 is formed in the circumferential outer wall of the side block 122, one end, away from the oil filling valve 17, of the first flow passage 171 extends to the side block 122, and in the sliding process of the annular lubrication passage 1221 along with the side block 122, when the side block 122 slides to the end, away from the oil filling valve 17, of the annular lubrication passage 1221, and the first flow passage 171 is communicated with the annular lubrication passage 1221 when the annular lubrication passage 1221 is opposite to the end, away from the oil filling valve 17, of the first flow passage 171.

Referring to fig. 5 and 7, the outer wall of the side block 122 is further provided with a vertical lubricating passage 1223 communicated with the annular lubricating passage 1221, the length direction of the vertical lubricating passage 1223 is parallel to the length direction of the side block 122, and two ends of the vertical lubricating passage 1223 extend to two ends of the side block 122 respectively.

Referring to fig. 5 and 7, the length direction of the slanted bar block 123 is parallel to the inclined direction of the slanted bar block 123, the two side surfaces of the slanted bar block 123 in the width direction are inclined surfaces 1232, and the inclined direction of the inclined surfaces 1232 is parallel to the inclined direction of the slanted bar block 123. The side block 122 is provided with a second flow passage 1222, one end of the second flow passage 1222 is communicated with the annular lubrication passage 1221, and the other end of the second flow passage 1222 extends to the slanted bar block 123. The inclined bar block 123 is provided with a third flow channel 1231, the length direction of the third flow channel 1231 is perpendicular to the inclined direction of the inclined bar block 123, two ends of the third flow channel 1231 extend to the two inclined surfaces 1232 respectively and are communicated with the outside, and one end of the second flow channel 1222 extending to the inclined bar block 123 is communicated with the third flow channel 1231.

Referring to FIGS. 5 and 7, when the side block 122 is slid until the annular lubrication passage 1221 faces the end of the first flow passage 171 remote from the fill valve 17, the first flow passage 171 communicates with the annular lubrication passage 1221 and also communicates directly with the second flow passage 1222.

Referring to fig. 5 and 7, two seepage channels 152 are respectively formed in the side surface of the fixing block 15 facing the jaw 13 and the side surface of the fixing block facing away from the jaw 13, the length direction of the seepage channels 152 is parallel to the length direction of the moving block 14, and the two seepage channels 152 are respectively located on two sides of the corresponding inclined grooves 151 and are located on the same straight line. Two communicating channels 153 are formed in the fixing block 15, the two communicating channels 153 are located on two sides of the chute 151 respectively, and two ends of the communicating channels 153 are communicated with two seepage channels 152 which are arranged oppositely.

In the process that the moving block 14 and the driving block 12 slide mutually under the action of the inclined bar block 123 and the inclined groove 151, when the moving block 14 and the driving block 12 slide mutually to the end of one seepage flow channel 152 facing the third flow channel 1231, the corresponding seepage flow channel 152 is directly communicated with the third flow channel 1231.

The whole oil injection process of the chuck is that, the oil injection valve 17 is opened for oil injection, at the moment, the chuck is in a normal working state, the clamping jaws 13 normally clamp and loosen the workpiece, lubricating oil injected from the oil injection valve 17 can flow into the second flow passage 1222 and the annular lubricating passage 1221 from the first flow passage 171, then the lubricating oil in the annular lubricating passage 1221 can flow into the vertical lubricating passage 1223 and lubricate the outer wall of the side block 122, the lubricating oil entering the second flow passage 1222 can continuously flow into the third flow passage 1231, then the lubricating oil respectively flows onto the two inclined surfaces 1232 to lubricate the two inclined surfaces 1232, and the lubricating oil on the inclined surfaces 1232 can also flow onto the bottom block 121 and lubricate the bottom block 121 and the movable block 11 on the movable block 1232. Meanwhile, when the third flow passage 1231 moves to the seepage passage 152, the lubricating oil in the third flow passage 1231 flows to the seepage passage 152 and flows to other seepage passages 152 through the communication passage 153, so that the fixed block 15 and the moving block 14 are lubricated.

The chuck utilizes the oiling valve 17 to carry out oiling, can realize the circulation of each part through various runners, need not to set up the oiling valve 17 alone for each part alone.

The implementation principle of the novel hollow three-jaw chuck in the embodiment of the application is as follows: operating personnel is through installing the piston rod on movable block 11, piston rod through the drive cylinder stretches out and contracts, drives movable block 11 round trip movement on disc seat 1, and the cooperation of the oblique strip piece 123 of rethread and chute 151 drives jack catch 13 and slides on disc seat 1 to the realization is to the clamp of work piece and unclamp, pours into lubricating oil into toward oiling valve 17 simultaneously, can realize the circulation of lubricating oil at each part through various runners, lubricate whole chuck.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides a novel cavity three-jaw chuck, includes disc seat (1) and three jack catch (13), can dismantle on jack catch (13) and be connected with movable block (14), jack catch (13) just set up movable block (14), radial direction sliding connection that jack catch (13) were followed disc seat (1) through movable block (14) is on disc seat (1), there is movable block (11), its characterized in that at disc seat (1) center along the axis direction sliding connection who is on a parallel with disc seat (1): the movable block (11) is fixed with three driving blocks (12), the three driving blocks (12) are respectively in one-to-one correspondence with the three moving blocks (14), the driving blocks (12) are arranged in a U shape, each driving block (12) comprises a bottom block (121) and two side blocks (122), the two side blocks (122) are respectively and vertically fixed at two ends of the bottom block (121), the bottom block (121) is fixed on the movable block (11), the two side blocks (122) are respectively positioned at two sides of the corresponding moving block (14), one side surface of each side block (122) facing the moving block (14) is provided with an inclined bar block (123) which is obliquely arranged, two side surfaces of each moving block (14) facing the two driving blocks (12) are respectively fixed with a fixed block (15), one side surface of each fixed block (15) facing the corresponding side block (122) is provided with an inclined groove (151) matched with the inclined bar (123), the oblique strip block (123) is connected to the oblique groove (151) in a sliding mode along the oblique direction parallel to the oblique strip block (123).

2. The novel hollow three-jaw chuck according to claim 1, characterized in that: the clamping jaw (13) is provided with a plurality of bolts (132), and one ends of the bolts (132) penetrate through the clamping jaw (13) and are in threaded connection with the moving block (14).

3. The novel hollow three-jaw chuck according to claim 2, characterized in that: the side surface of one side, facing the moving block (14), of each claw (13) is provided with a first tooth surface (131), the side surface of one side, facing the corresponding claw (13), of the moving block (14) is provided with a second tooth surface (141), the length directions of the first tooth surfaces (131) and the second tooth surfaces (141) are parallel to the sliding direction of the corresponding claws (13) and the moving block (14) on the disc seat (1), and the first tooth surfaces (131) are connected to the second tooth surfaces (141) in a meshed mode.

4. The novel hollow three-jaw chuck according to claim 1, characterized in that: a limiting groove (142) is formed in the side face, away from the clamping jaws (13), of the moving block (14), a limiting block (16) is arranged on the disc base (1), one end of the limiting block (16) is located in the limiting groove (142) all the time, and the length direction of the limiting groove (142) is parallel to the moving direction of the corresponding moving block (14).

5. The novel hollow three-jaw chuck according to claim 1, characterized in that: be equipped with a plurality of oiling valves (17) on disc seat (1), a plurality of first runners (171) have been seted up on disc seat (1), a plurality of first runners (171) respectively with a plurality of oiling valves (17) one-to-one, annular lubrication way (1221) have been seted up along the circumference direction that drives piece (12) tip on side piece (122) outer wall, a plurality of first runners (171) respectively with a plurality of annular lubrication way (1221) one-to-one, vertical lubrication way (1223) that are linked together with annular lubrication way (1221) are seted up along the axis direction that is on a parallel with disc seat (1) to side piece (122) outer wall, the one end intercommunication oiling valve (17) of first runner (171), the other end of first runner (171) is located the moving path of annular lubrication way (1221), when driving piece (12) move to annular lubrication way (1221) just keep away from the tip of oiling valve (17) to first runner (171), the first flow passage (171) is communicated with the annular lubrication channel (1221).

6. The novel hollow three-jaw chuck according to claim 5, characterized in that: the improved lubricating device is characterized in that a second flow channel (1222) is formed in the side block (122), a third flow channel (1231) is formed in the oblique strip block (123), the side faces of two sides of the oblique strip block (123) are inclined planes (1232), the inclined directions of the inclined planes (1232) are parallel to the inclined directions of the oblique strip block (123), two ends of the third flow channel (1231) are respectively communicated with the two inclined planes (1232) of the oblique strip block (123), and two ends of the second flow channel (1222) are respectively communicated with the annular lubricating channel (1221) and the third flow channel (1231).

7. The novel hollow three-jaw chuck according to claim 6, characterized in that: when the driving block (12) moves to the end part of the annular lubrication channel (1221) opposite to the first flow channel (171) far away from the oil filling valve (17), the first flow channel (171) is directly communicated with the second flow channel (1222).

8. The novel hollow three-jaw chuck according to claim 6, characterized in that: the side face, facing the clamping jaw (13), of one side of the fixed block (15) and the side face, far away from the clamping jaw (13), of one side of the fixed block (15) are respectively provided with an infiltration channel (152), the moving block (14) is provided with a communication channel (153), two ends of the communication channel (153) are respectively communicated with the two infiltration channels (152), and when the moving block (14) and the driving block (12) slide to one of the infiltration channels (152) and just face the end portion of the third channel (1231), the corresponding infiltration channels (152) are communicated with the third channel (1231).

Images