CN211193044U

CN211193044U - Clamping fixture with oil supply system for machine tool spindle

Info

Publication number: CN211193044U
Application number: CN201921248928.6U
Authority: CN
Inventors: 唐东雷
Original assignee: Jinshang Precision Machine Tool Zhejiang Co ltd
Current assignee: Jinshang Precision Machine Tool Zhejiang Co ltd
Priority date: 2019-08-03
Filing date: 2019-08-03
Publication date: 2020-08-07
Anticipated expiration: 2029-08-03

Abstract

The utility model discloses a clamping anchor clamps for lathe main shaft with oil feeding system relates to lathe spare part field, including fixed connection in the base of lathe bed, connect in the base and support the work piece outer lane tightly in hold-down mechanism, coaxial coupling of base and along with the rotatory dabber of main shaft, drive hold-down mechanism's oil feeding system of main shaft, the dabber is kept away from main shaft one end and is circumference fixed and drive work piece inner circle rotation with the work piece inner circle, hold-down mechanism includes fixed connection in the rotary hydraulic cylinder of base, connects in rotary hydraulic cylinder and is used for supporting the work piece outer lane tightly in the clamp plate of base, oil feeding system control rotary hydraulic cylinder drives the clamp plate and compresses tightly or breaks away from the work piece outer lane. The utility model provides a can promote the special clamping anchor clamps for machine tool spindle of parts machining precision.

Description

Clamping fixture with oil supply system for machine tool spindle

Technical Field

The utility model relates to a lathe spare part, in particular to clamping anchor clamps for lathe main shaft with oil feeding system.

Background

The hub bearing is one of the key parts of the automobile, and the main functions of the hub bearing are to bear the weight and provide accurate guidance for the rotation of the hub, so that the hub bearing is required to bear not only axial load but also radial load.

The existing hub bearing unit comprises an inner flange and an outer flange which are connected in a rotating mode, and a ball arranged between the inner flange and the outer flange, and the hub bearing with the fixing assembly disclosed by the Chinese patent publication No. CN208595158U comprises a hub bearing outer ring, a hub bearing inner ring arranged on the inner side of the hub bearing outer ring is sleeved with the hub bearing outer ring, two groups of annular arranging grooves corresponding to each other are arranged on the inner side surface of the hub bearing outer ring and the outer side surface of the hub bearing inner ring, a plurality of steel balls are arranged in the annular arranging grooves, sealing ring assemblies are arranged at two ends of the hub bearing inner ring, and the sealing ring assemblies are in contact with the inner. In the production and manufacturing process, in order to match the installation requirements in the later stage, the end face of the inner ring of the hub bearing needs to be machined, the end face of the inner ring of the hub bearing can only be machined before the whole assembly by the common machining mode due to the limitation of a machining tool, then the outer ring and the inner ring of the hub bearing are assembled, and because assembly errors exist in the assembly process, the size relation between the inner ring of the hub bearing and the outer ring of the hub bearing can be influenced due to the assembly errors, and further the subsequent actual installation and use are influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a clamping anchor clamps for lathe main shaft with oil feeding system is convenient for fix one of them of two relative pivoted parts, makes another can rotate in the processing, avoids influencing the product and uses because the assembly error in two part later stages.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a clamping anchor clamps for lathe main shaft with oil feeding system, includes fixed connection in the base of lathe bed, connects in the base and supports the work piece outer lane tightly in the hold-down mechanism of base, coaxial coupling in the main shaft and along with the rotatory dabber of main shaft, drive hold-down mechanism's oil feeding system, the dabber is kept away from main shaft one end and is fixed and drive the work piece inner circle rotation with the work piece inner circle in circumference, hold-down mechanism includes fixed connection in the rotary hydraulic cylinder of base, connects in rotary hydraulic cylinder and be used for supporting the work piece outer lane tightly in the clamp plate of base, oil feeding system control rotary hydraulic cylinder drives the clamp plate and compresses tightly.

By adopting the technical scheme, before processing, the workpiece outer ring and the workpiece inner ring are assembled, then the workpiece outer ring is tightly abutted to the side wall of the base through the pressing mechanism, the pressing plate can be driven to rotate and apply abutting force tightly abutting to the side wall of the base to the workpiece outer ring under the action of the rotary hydraulic cylinder, the pressing plate is driven to rotate through the rotary hydraulic cylinder, so that the workpiece can be conveniently charged and discharged, the installation space of the workpiece is prevented from being blocked by the pressing plate, the contact area between the workpiece inner ring and the workpiece outer ring can be increased by utilizing the pressing plate, the stability during abutting is improved, meanwhile, the workpiece inner ring and the mandrel are fixedly connected in the circumferential direction, so that the workpiece inner ring can be driven to rotate around the axial direction of the workpiece inner ring under the driving of the main shaft, a machine tool can conveniently process the end face of the workpiece inner ring, and the size relation between the workpiece outer, the accurate processing of being convenient for avoids processing back reassembling and because the assembly error between inside and outside part influences the original size precision that has processed alone to inside and outside part, makes processing more convenient.

The utility model discloses further set up to: the rotary hydraulic cylinder comprises a cylinder body fixedly connected to the base, a piston which is connected to the cylinder body in an axial sliding mode along the center of the cylinder body and rotates around the center of the cylinder body in an axial mode, a retainer fixedly connected to the cylinder body, and steel balls arranged between the retainer and the piston, wherein a spiral groove used for embedding the rolling steel balls is formed in the outer wall of the piston arranged in the cylinder body, and the piston is divided into two oil cavities.

By adopting the technical scheme, when oil is filled in one of the oil cavities, the piston is pushed to move in the cylinder body, and because the steel balls in the retainer are embedded in the spiral grooves rolling in the piston, when the piston moves along the center axial direction of the cylinder body, the piston can rotate around the self axial direction by utilizing the acting force of the steel balls on the spiral grooves in the moving process, so that the pressing plate is driven to rotate, and the pressing plate can move while rotating to apply the abutting force on the workpiece.

The utility model discloses further set up to: the oil supply system comprises a hydraulic station, a first oil pipe and a second oil pipe which are communicated with the hydraulic station, an electromagnetic valve which is communicated with the first oil pipe and the second oil pipe, and an upper oil pipe and a lower oil pipe, wherein one end of the upper oil pipe and one end of the lower oil pipe are communicated with the electromagnetic valve, and the other end of the upper oil pipe and the other end of the lower oil pipe are respectively communicated with one oil.

Through adopting above-mentioned technical scheme, utilize the hydraulic oil that the hydraulic pressure station provided certain pressure, rely on the solenoid valve can control oil pipe or oil pipe down and lead to oil to one of them oil pocket respectively to control piston rotates and drives the clamp plate and rotate and remove, realizes supporting tightly or breaking away from to the work piece outer lane, and then is convenient for control the motion of clamp plate, reaches better effect that compresses tightly.

The utility model discloses further set up to: the upper oil pipe and the lower oil pipe are arranged on the base and the cylinder body in a penetrating mode.

Through adopting above-mentioned technical scheme, with the pipe that oils that transmits and oil pipe let in to base and cylinder body down, oil pipe wears to establish and influences the exterior space and use about avoiding externally, reaches more reasonable oil circuit and arranges.

The utility model discloses further set up to: the pressing plate is detachably connected with the piston rod.

By adopting the technical scheme, the shape of the pressing plate is changed according to the different shapes of the actual workpieces.

The utility model discloses further set up to: and one end of the mandrel, which is far away from the main shaft, is fixedly connected with a driving spline sleeve which is circumferentially fixed with the inner ring of the workpiece.

By adopting the technical scheme, the spline sleeve is convenient for circumferentially fixing the mandrel and the workpiece inner ring, and the workpiece inner ring can be driven to rotate when the mandrel is driven by the main shaft.

The utility model discloses further set up to: the outer wall of the driving spline sleeve is provided with a spline which is circumferentially fixed with the inner ring of the workpiece, the inner wall of the driving spline sleeve is provided with a key groove which is axially arranged, and the outer wall of the mandrel is connected with a key which is embedded in the key groove.

By adopting the technical scheme, the driving spline housing and the mandrel are circumferentially fixed, the driving spline housing can be synchronously driven to rotate when the mandrel rotates, the driving spline housing can be replaced according to the diameter of the inner ring of an actual workpiece, and the application range of the driving spline housing is expanded.

The utility model discloses further set up to: still including can dismantle connect in the main shaft terminal surface and be coaxial connection pad with the main shaft, the dabber can be dismantled and connect in the connection pad, the dabber is coaxial with the connection pad, the connection pad is arranged in inside and being relative rotation with the base of base.

Through adopting above-mentioned technical scheme, rely on the connection pad can be convenient for fix the dabber to make the dabber keep being coaxial with the connection pad, thereby when connecting work piece inner circle in the dabber, make the work piece keep being coaxial with the dabber, can promote the clamping precision of work piece, and then promote the precision of processing.

To sum up, the utility model discloses following beneficial effect has: utilize rotary hydraulic cylinder to drive the clamp plate and rotate the limit and remove, realize supporting the work piece outer lane tightly in the base, in step, utilize the drive spline housing to be fixed in the dabber with work piece inner lane circumference, then by the rotation of main shaft drive work piece inner lane, keep the work piece outer lane stable still simultaneously, and then be convenient for utilize the cutter of lathe to process the terminal surface of work piece inner lane, be different from alone to the size relation that the part processing can influence the part because of the assembly error of work piece outer lane inner lane, promoted the size precision of final part.

Drawings

FIG. 1 is a side view of the present embodiment;

FIG. 2 is an enlarged view of section I of FIG. 1;

FIG. 3 is a cross-sectional view of the rotary cylinder of the present embodiment;

FIG. 4 is a schematic view of an oil system;

fig. 5 is a schematic view of the projection of the present embodiment toward the end surface of the main shaft.

Reference numerals: 1. a base; 2. a hold-down mechanism; 21. a rotary hydraulic cylinder; 211. a cylinder body; 212. a piston; 213. a holder; 214. steel balls; 215. a helical groove; 22. pressing a plate; 3. a mandrel; 4. an oil supply system; 41. a hydraulic station; 42. a first oil pipe; 43. a second oil pipe; 44. an electromagnetic valve; 45. feeding an oil pipe; 451. oiling a main pipe; 452. oiling branch pipes; 46. discharging an oil pipe; 461. a main oil drain pipe; 462. an oil discharge branch pipe; 5. an oil chamber; 6. a driving spline housing; 61. a spline; 7. a keyway; 8. a key; 9. a connecting disc; 10. positioning blocks; 11. a machine tool; 12. a spindle housing; 13. a main shaft; 111. a large circular truncated cone; 112. a small round table; 14. locking the nut; 15. a gas path main pipe; 16. a gas path branch pipe; 17. a piston body; 18. a rod is arranged; 19. a lower rod; 20. a rotating groove; 23. an upper guide groove; 24. a middle guide groove; 25. a lower guide groove; 26. an inner ring of a workpiece; 27. and (5) workpiece outer ring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The clamping fixture comprises a base 1 fixedly connected to the side wall of a main shaft shell 12 of a machine tool 11, a connecting disc 9 coaxial with the main shaft 13 is fixedly connected to the end face of the main shaft 13, a mandrel 3 coaxial with the main shaft 13 is fixedly connected to the end face of one side, away from the main shaft 13, of the connecting disc 9, the end face of the inner ring 26 of a workpiece and the end face, away from the main shaft 13, of the mandrel 3 are circumferentially fixed and synchronous, and a pressing mechanism 2 used for abutting a workpiece outer ring 27 against the side wall of the base 1 is fixedly installed on the end face of the base 1, so that the inner ring 26 of the workpiece is driven by the main shaft 13 to rotate around the axial direction of the inner ring 26 of the workpiece in the machining process, meanwhile, the workpiece outer ring 27 is kept stable, and machining of the.

The base 1 is disc-shaped, two ends of the base are penetrated through, a large circular table 111 and a small circular table 112 which are cylindrical are respectively formed on two end surfaces of the base 1, and the position, close to the edge, of the large circular table 111 is fixedly connected to the side wall of the main shaft shell 12 of the machine tool 11 through seven bolts. An inward-concave installation space is formed in one side, facing the main shaft 13, of the large circular table 111, a disc-shaped connecting disc 9 is fixedly connected to the end face of the main shaft 13 through bolts and is arranged in the installation space, after the disc-shaped connecting disc is installed, the connecting disc 9 and the main shaft 13 are kept coaxial, a mandrel 3 which is coaxial with the main shaft 13 is fixedly connected to the center of the connecting disc 9 through bolts, one end, far away from the connecting disc 9, of the mandrel 3 extends out of the small circular table 112, a driving spline housing 6 is fixedly connected to one end, far away from the connecting disc 9, of the mandrel 3 in the circumferential direction, and a spline 61 which is meshed with the workpiece inner ring 26 and fixed in the circumferential direction is. In order to promote the connection stability of drive spline housing 6 and dabber 3, set up along its axial keyway 7 at drive spline housing 6 inner wall, and be provided with the key 8 of inlaying in keyway 7 at the outer wall of dabber 3, be interference fit between keyway 7 and the key 8, be convenient for realize that drive spline housing 6 and dabber 3's circumference is fixed, then can drive spline housing 6 and rotate under dabber 3's drive, when need changing drive spline housing 6 according to actual product, beat drive spline housing 6 from dabber 3 down, the rethread is more changed key 8 and is installed not unidimensional drive spline housing 6 and come to be suitable for not unidimensional work piece. In the machining process, the driving spline housing 6 and the workpiece inner ring 26 are circumferentially fixed, and the workpiece inner ring 26 is driven by the main shaft 13 to axially rotate around the workpiece inner ring 26.

Referring to fig. 1, in order to tightly fix the workpiece outer ring 27 when the workpiece inner ring 26 is driven to rotate, the pressing mechanism 2 includes two rotary hydraulic cylinders 21 fixedly installed on an end surface of the base 1 on a side away from the main shaft 13, each rotary hydraulic cylinder 21 includes a cylindrical cylinder body 211 fixedly connected to the base 1, a center axis of the cylinder body 211 is parallel to a central axis of the mandrel 3, as shown in fig. 3, a piston 212 is slidably connected to the cylinder body 211 along a center axis thereof, the piston 212 includes a piston body 17 disposed inside the cylinder body 211, an upper rod 18 and a lower rod 19 connected to upper and lower end surfaces of the piston body 17, the entire piston 212 is rotatably connected to the cylinder body 211 around its own axis, the upper rod 18 is inserted into the end surface of the cylinder body 211, a seal ring or a seal gasket is disposed between an outer wall of the upper rod 18 and an inner wall, the upper rod 18 is inserted into the pressing plate 22 and is threadedly connected with a lock nut 14, so that the pressing plate 22 and the upper rod 18 are fixed, and the pressing plate 22 with different shapes can be replaced according to the shape of an actual workpiece. In order to synchronously rotate while the piston 212 moves, a retainer 213 is fixed at a position close to the bottom end of the cylinder body 211, a rotating groove 20 for the lower rod 19 to be inserted and penetrated is formed in the center of the retainer 213, a plurality of steel balls 214 are connected to the side wall of the rotating groove 20 in a rolling manner along the circumferential direction of the rotating groove on the same plane, synchronously, spiral grooves 215 corresponding to the steel balls 214 one by one are formed in the outer wall of the lower rod 19 along the circumferential direction of the outer wall, the spiral grooves 215 are divided into an upper guide groove 23 extending along the axial direction of the lower rod 19, a middle guide groove 24 spirally formed in the outer wall of the lower rod 19 and communicated with the bottom end of the upper guide groove 23, and a lower guide groove 25 communicated with the bottom end of the middle guide groove 24 and extending to the bottom end of the lower rod 19, and when the steel balls 214 are located in the lower. A sealing gasket (not marked in the figure) is arranged between the outer wall of the lower rod 19 and the side wall of the rotating groove 20 and above the steel ball 214. The outer edge of the piston body 17 is embedded with a sealing ring which is in sealing fit with the inner wall of the cylinder body 211, the piston body 17 divides the interior of the cylinder body 211 into an upper oil chamber 5 and a lower oil chamber 5 which are not communicated, and the piston body 17 can keep the upper oil chamber 5 and the lower oil chamber 5 separated when moving and rotating in the cylinder body 211. When the rotary hydraulic cylinder 21 rotates and moves the pressing plate 22, the pressing plate 22 can be inserted between the workpiece inner ring 26 and the workpiece outer ring 27, and a pressing force toward the base 1 is applied to the workpiece outer ring 27.

Be convenient for carry out stable positioning to work piece outer lane 27, deviate from connecting pad 9 one side terminal surface at small round platform 112 and pass through locating piece 10 that the center runs through bolt fixedly connected with, locating piece 10 deviates from small round platform 112 one side terminal surface and is on a parallel with main shaft 13 terminal surface, under the effect of clamp plate 22, can support work piece outer lane 27 tightly in work piece outer lane 27 terminal surface steadily.

In order to realize the action of the rotary hydraulic cylinder 21, referring to fig. 4 and 5, the present invention further comprises an oil circuit system, the oil circuit system comprises a hydraulic station 41, the hydraulic station 41 is communicated with a first oil pipe 42 and a second oil pipe 43, the first oil pipe 42 and the second oil pipe 43 are simultaneously communicated with a solenoid valve 44, the solenoid valve 44 selects a two-position four-way valve, the first oil pipe 42 is communicated with an O port of the solenoid valve 44, the second oil pipe 43 is communicated with a P port of the solenoid valve 44, a port a of the solenoid valve 44 is communicated with an upper oil pipe 45, a port B of the solenoid valve 44 is communicated with a lower oil pipe 46, one end of the upper oil pipe 45 far away from the solenoid valve 44 is communicated with the oil chamber 5 above the inside of the cylinder body 211, one end of the lower oil pipe 46 far away from the solenoid valve 44 is communicated with the oil chamber 5 below the inside of the cylinder body 211, the upper oil pipe 45 comprises an upper oil header 451 (shown in fig. 1, the two upper oil branch pipes 452 are respectively communicated with the upper oil chamber 5 of one of the cylinder blocks 211, the lower oil pipe 46 comprises a lower oil main pipe 461 penetrating through the base 1, the lower oil main pipe 461 is communicated with two lower oil branch pipes 462 penetrating through one of the cylinder blocks 211, and the two lower oil branch pipes 462 are respectively communicated with the lower oil chamber 5 of one of the cylinder blocks 211.

In order to determine the clamping stability of the workpiece, referring to fig. 1, a gas path main pipe 15 is arranged in a base 1, the gas path main pipe 15 is communicated with two gas path branch pipes 16 penetrating through the end surface of a small round platform 112, the two gas path branch pipes 16 penetrate through the end surface of the small round platform 112 away from a connecting disc 9, a connecting line between the centers of the two gas path branch pipes 16 passes through the circle center of the small round platform 112, an opening of one end of the gas path branch pipe 16 far away from the gas path main pipe 15 is blocked by the end surface of a workpiece outer ring 27, when the outer ring 27 of the workpiece is pressed against the end surface of the small circular table 112 by the pressing plate 22, the gas in the gas path branch pipe 16 cannot overflow, the gas pressure detector communicated with the gas path main pipe 15 is used to detect whether the gas pressure is kept stable, if the air pressure is unstable, the gas overflows, the workpiece is not completely abutted against the end face of the positioning block 10, and if the air pressure value is stable, the workpiece clamping is stable.

The working principle of the embodiment is that the outer ring 27 and the inner ring 26 of the workpiece are assembled, the inner wall of the inner ring 26 of the workpiece is sleeved on the driving spline sleeve 6, the spline 61 and the inner wall of the inner ring 26 of the workpiece are circumferentially fixed, meanwhile, the end surface of the outer ring 27 of the workpiece facing one side of the base 1 abuts against the end surface of the positioning block 10, the electromagnetic valve 44 is controlled to charge oil into one oil cavity 5 in the cylinder body 211, the piston body 17 moves in the cylinder body 211, the piston body 17 rotates around the axial direction of the piston body 17 by the cooperation of the steel balls 214 and the spiral grooves 215 while moving, so that the pressing plate 22 is driven to extend between the outer ring 27 of the workpiece and the inner ring 26 of the workpiece, a thrust facing the direction of the base 1 is applied to the end surface of the outer ring 27 of the. The workpiece inner ring 26 is driven to rotate by the rotation of the main shaft 13, so that the end face of the workpiece inner ring 26 is machined by a cutter, after the machining is finished, the electromagnetic valve 44 is controlled to charge oil in another oil cavity 5 in the cylinder body 211, the piston 212 rotates towards another direction, and the pressure plate 22 is driven to move towards the side departing from the base 1 and move out from the position between the workpiece inner ring 26 and the workpiece outer ring 27, so that the whole workpiece is conveniently discharged from the driving spline housing 6.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. The utility model provides a clamping anchor clamps for lathe main shaft with oil feeding system, characterized by: including base (1) fixed connection in lathe (11) lathe bed, connect in base (1) and support work piece outer lane (27) tightly in hold-down mechanism (2) of base (1), coaxial coupling in main shaft (13) and along with spindle (13) rotatory dabber (3), drive hold-down mechanism's (2) oil feeding system (4), spindle (3) are kept away from main shaft (13) one end and are circumference fixed and drive work piece inner circle (26) and rotate with work piece inner circle (26), hold-down mechanism (2) including fixed connection in rotary hydraulic cylinder (21) of base (1), connect in rotary hydraulic cylinder (21) and be used for supporting tightly work piece outer lane (27) in clamp plate (22) of base (1), oil feeding system (4) control rotary hydraulic cylinder (21) drive clamp plate (22) compress tightly or break away from work piece outer lane (27).

2. The clamping fixture with the oil supply system for the machine tool spindle as claimed in claim 1, wherein: the rotary hydraulic cylinder (21) comprises a cylinder body (211) fixedly connected to the base (1), a piston (212) axially and slidably connected to the cylinder body (211) along the center of the cylinder body (211) and axially and rotatably connected to the cylinder body (211) around the center of the cylinder body (211), a retainer (213) fixedly connected to the cylinder body (211), and steel balls (214) arranged between the retainer (213) and the piston (212), wherein a spiral groove (215) used for embedding the rolling steel balls (214) is formed in the outer wall of the piston (212) arranged in the cylinder body (211), and the cylinder body (211) is divided into two oil cavities (5) by the piston (212).

3. The clamping fixture with the oil supply system for the machine tool spindle as claimed in claim 2, wherein: the oil supply system (4) comprises a hydraulic station (41), a first oil pipe (42) and a second oil pipe (43) which are communicated with the hydraulic station (41), an electromagnetic valve (44) which is communicated with the first oil pipe (42) and the second oil pipe (43), and an upper oil pipe (45) and a lower oil pipe (46) of which one end is communicated with the electromagnetic valve (44) and the other end is respectively communicated with one oil cavity (5).

4. The clamping fixture with the oil supply system for the machine tool spindle as claimed in claim 3, wherein: the upper oil pipe (45) and the lower oil pipe (46) penetrate through the base (1) and the cylinder body (211).

5. The clamping fixture with the oil supply system for the machine tool spindle as claimed in claim 1, wherein: the pressure plate (22) is detachably connected with the piston (212).

6. The clamping fixture with the oil supply system for the machine tool spindle as claimed in claim 1, wherein: and one end of the mandrel (3), which is far away from the main shaft (13), is fixedly connected with a driving spline sleeve (6) which is circumferentially fixed with the workpiece inner ring (26).

7. The clamping fixture with the oil supply system for the machine tool spindle as claimed in claim 6, wherein: the outer wall of the driving spline sleeve (6) is provided with a spline (61) which is circumferentially fixed with the workpiece inner ring (26), the inner wall of the driving spline sleeve (6) is provided with a key groove (7) which is axially arranged along the inner wall, and the outer wall of the mandrel (3) is connected with a key (8) which is embedded in the key groove (7).

8. The clamping fixture with the oil supply system for the machine tool spindle as claimed in claim 1, wherein: still including dismantling to connect in main shaft (13) terminal surface and be coaxial connection pad (9) with main shaft (13), dabber (3) can be dismantled to connect in connection pad (9), dabber (3) are coaxial with connection pad (9), base (1) is inside and is relative rotation with base (1) in arranging in connection pad (9).