CN213702645U

CN213702645U - High-speed broaching machine

Info

Publication number: CN213702645U
Application number: CN202022218236.6U
Authority: CN
Inventors: 林绿高
Original assignee: Zhejiang Chr Intelligent Equipment Co ltd
Current assignee: Zhejiang Chr Intelligent Equipment Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-07-16
Anticipated expiration: 2030-09-30

Abstract

The utility model relates to a high-speed broaching machine, include: a bed body; the slide carriage is arranged on the bed body in a way of moving up and down; the driving motor is arranged on the lathe bed, and a power output shaft of the driving motor is connected with the slide carriage through a ball screw so as to drive the slide carriage to move up and down; and the braking device is arranged on the bed body, is communicated with a control system signal and can act on the ball screw or the power output shaft of the driving motor, so that the corresponding ball screw or the power output shaft of the driving motor is locked after the driving motor is powered off. After the driving motor of the high-speed broaching machine is powered off, the braking device can lock the corresponding ball screw or the power output shaft of the driving motor in time under the control of the control system, so that the problem that the slide carriage slides down after the power off is effectively avoided, the potential safety hazard is eliminated, and the reliability of the production process of the high-speed broaching machine is improved.

Description

High-speed broaching machine

Technical Field

The utility model relates to a machine tool equipment technical field especially relates to a high-speed broaching machine.

Background

In machining, a gear is one of the most common power transmission elements, and a gear pair formed by two gears arranged in a matching manner is used for transmitting torque, and is widely applied to power transmission of automobiles or motorcycles. At present, key grooves, tooth grooves and the like are mostly processed on the inner circle of a gear through broaching of a broaching machine. However, in the gear machining process, for an internal spline workpiece with the hardness reaching HRC60, the requirement on the broaching speed of a machine tool is high. In the conventional broaching mode, in particular to broaching operation driven by a servo motor, the speed is usually not more than 30m/min at most, and the speed can not realize the processing of high-hardness parts. Therefore, a high-speed broaching machine appears in the market, for example, the chinese utility model patent with the application number CN201621435498.5 (the publication number CN206276973U) discloses a high-speed internal broaching machine for processing hard teeth.

In the conventional servo motor-driven broaching operation, the speed is usually not more than 30m/min at most, and when the hardness of a processed object reaches HRC60, the cutting operation cannot be realized at all. In order to meet the condition of high-speed hard tooth broaching, a high-power servo motor is required to be used for driving operation, and particularly, a linear guide rail form is adopted for guiding a main slide carriage, and the main slide carriage moves up and down linearly along with the driving of the servo motor and a ball screw, so that the requirement of high-speed movement is met. In the practical application process, the existing high-speed broaching machine has the following defects: firstly, the high-power servo motor does not have a circle locking function, so that a lead screw cannot be locked in time, and a vertical driving mode is adopted, so that the slide carriage is easy to have a hidden risk of sliding down after power failure; secondly, the common coupler matched with the key groove is not suitable for a high-speed broaching machine, has a radial gap in the transmission process, has larger abnormal sound when being applied to the high-speed broaching machine, has poor transmission stability, and can not effectively meet the requirement of high-speed movement.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to prior art's current situation, thereby provide one kind can in time die the high broaching machine of the gliding risk of carriage apron with the lead screw lock after the outage.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a high-speed broaching machine comprising:

a bed body;

the slide carriage is arranged on the bed body in a way of moving up and down;

the driving motor is arranged on the lathe bed, and a power output shaft of the driving motor is connected with the slide carriage through a ball screw so as to drive the slide carriage to move up and down;

and the braking device is arranged on the bed body, is communicated with a control system signal and can act on the ball screw or the power output shaft of the driving motor, so that the corresponding ball screw or the power output shaft of the driving motor is locked after the driving motor is powered off.

In order to effectively brake the ball screw, the driving motor is arranged on a top plate of the lathe bed, the upper end of the ball screw penetrates out of the top plate of the lathe bed and is connected with a power output shaft of the driving motor through a coupler, and the braking device is arranged on the top plate of the lathe bed and acts on the upper end of the ball screw.

As an improvement, the braking device is an electromagnetic power-off brake. It is conceivable that the braking device may also be selected from existing hydraulic braking devices.

In order that the electromagnetic power-off brake is more suitable for being assembled with the upper end of the ball screw, the electromagnetic power-off brake comprises:

a brake body having a yoke assembly;

the shaft sleeve comprises an annular connecting part sleeved and connected with the upper end part of the ball screw and a braking piece extending outwards from the annular connecting part in the radial direction, and a friction plate is arranged on the side wall of the braking piece;

the pressing sheet is sleeved on the annular connecting part of the shaft sleeve, is positioned between the brake main body and the brake piece of the shaft sleeve, and can be attracted by the magnetic yoke assembly in an electrified state to be far away from the brake piece of the shaft sleeve;

and the return spring is arranged on the brake main body and can act on the pressing sheet to ensure that the pressing sheet always has the tendency of moving towards the braking sheet of the shaft sleeve.

In order to increase the stability between the driving motor and the ball screw in the high-speed transmission process and avoid abnormal sound, the coupler comprises a first connecting sleeve and a second connecting sleeve, the first connecting sleeve is basically columnar and is provided with a first hole which is axially communicated for the power output shaft of the driving motor to extend into, the second connecting sleeve is also basically columnar and can be detachably connected with the first connecting sleeve, the second connecting sleeve is provided with a second hole which is axially arranged for the upper end of the ball screw to extend into, the first hole is a first conical hole, the end part of the power output shaft of the driving motor is provided with a conical section matched with the first conical hole, the conical degree of the first conical hole is the same as that of the conical section of the power output shaft of the driving motor, after the power output shaft of the driving motor passes through the first hole, a locking nut correspondingly connected to the end part of the power output shaft of the driving motor can be axially abutted against the end wall of the first connecting sleeve, therefore, the first connecting sleeve is locked with the power output shaft of the driving motor in the radial direction, the expansion sleeve assembly is arranged in the second hole of the second connecting sleeve, a plurality of connecting holes are formed in the end wall of the expansion sleeve assembly along the circumferential direction of the end wall, and expansion bolts capable of enabling the expansion sleeve assembly to deform in the radial direction are arranged in the connecting holes.

In order to ensure that the connection between the first connecting sleeve and the power output shaft of the driving motor is firmer and avoid the problem of slipping of the first connecting sleeve and the power output shaft in the transmission process, the inner wall of the first hole is provided with a positioning groove which is axially arranged, and the outer wall of the conical section of the power output shaft of the driving motor is provided with a positioning lug corresponding to the positioning groove.

As an improvement, the taper of the first taper hole is 1:8-1: 15. Preferably, the taper of the first tapered hole is 1: 10.

In order to facilitate connection between the first connecting sleeve and the second connecting sleeve, a first flange extending outwards in the radial direction is arranged at the end part of the first connecting sleeve, a second flange extending outwards in the radial direction is arranged at the end part of the second connecting sleeve, and the first flange and the second flange are connected through a locking bolt.

As an improvement, the end wall of the second connecting sleeve is provided with a first stepped hole for accommodating the lock nut corresponding to the lock nut connected to the power output shaft of the driving motor. The structure is arranged, so that the interference caused by the connection of the locking piece between the first connecting sleeve and the second connecting sleeve can be avoided.

Reliably be connected through tight cover subassembly and ball in order to realize the second adapter sleeve that expands, the port in the second hole of second adapter sleeve has the second step hole corresponding to ball's upper end, tight cover subassembly that expands is located in this second step hole, tight cover subassembly that expands includes first tight cover and the tight cover that expands of second, the tight cover of second expansion is established on ball's the upper end, first tight cover of expanding is established outside the tight cover of second expansion to expand tightly to overlap through conical surface cooperation with the second, first tight cover that expands is equipped with the connecting hole, the tight bolt that expands passes the tight cover of second expansion is connected in the connecting hole of first tight cover that expands.

Compared with the prior art, the utility model has the advantages that: after the driving motor of the high-speed broaching machine is powered off, the braking device can lock the corresponding ball screw or the power output shaft of the driving motor in time under the control of the control system, so that the problem that the slide carriage slides down after the power off is effectively avoided, the potential safety hazard is eliminated, and the reliability of the production process of the high-speed broaching machine is improved.

Drawings

Fig. 1 is a schematic perspective view of a high-speed broaching machine according to an embodiment of the present invention;

fig. 2 is a schematic view of a partial structure of the height broaching machine according to the embodiment of the present invention (the motor bracket is omitted);

fig. 3 is a vertical sectional view of fig. 2 (the driving motor is not shown).

Fig. 4 is a schematic perspective view of a coupling according to an embodiment of the present invention;

fig. 5 is an axial cross-sectional view of a coupling according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

Referring to fig. 1 to 5, a high-speed drawing machine includes a bed 33, a carriage 32, a drive motor 30, a ball screw 31, a coupling 10, and a brake device 40. The bed 33 of this embodiment is vertical, and the carriage 32 is provided on the bed 33 so as to be movable up and down. The driving motor 30 is arranged on the lathe bed 33, and a power output shaft 300 of the driving motor 30 is connected with the upper end of the ball screw 31 through a coupler, so as to drive the slide carriage 32 to move up and down.

Referring to fig. 2 and 3, the driving motor 30 is disposed on the upper portion of the bed 33, specifically on the top plate 331 of the bed 33. The top plate 331 of the bed 33 is provided with a motor support 34, the driving motor 30 is arranged on the motor support 34, and the power output shaft 300 of the driving motor 30 is arranged downwards. The upper end of the ball screw 31 passes through the top plate 331 of the bed 33 and is connected to the power output shaft 300 of the drive motor 30 via the coupling.

Referring to fig. 2 and 3, the braking device 40 is disposed on the top plate 331 of the bed 33, and is in signal communication with the control system, specifically, acts on the upper end of the ball screw 31. After the driving motor 30 is powered off, the ball screw 31 can be locked in time by the braking device 40, so that the problem that the slide carriage 32 slides downwards after being powered off is effectively avoided.

Referring to fig. 3, the braking device 40 of the present embodiment is an electromagnetic power-off brake. The electromagnetic power-off brake comprises a brake main body 41, a shaft sleeve 42, a pressing sheet 43, a return spring 44 and a connecting flange 45. The brake body 41 is fixed to the top plate 331 of the bed 33 by a connecting flange 45, and the yoke assembly 410 is provided on the brake body 41. The sleeve 42 includes an annular connecting portion 421 and a brake plate 422 extending radially outward from the annular connecting portion 421, an inner wall of the annular connecting portion 421 of the sleeve 42 is connected to an outer wall of an upper end of the ball screw 31 by a key groove, and a friction plate 423 is disposed on a side wall of the brake plate 422 of the sleeve 42. The pressing piece 43 is sleeved on the annular connecting portion 421 of the shaft sleeve 42, and is specifically located between the end wall of the brake main body 41 and the side wall of the brake piece 422 of the shaft sleeve 42. The return spring 44 is also provided on the brake body 41, and specifically, the brake body 41 has a spring receiving groove (not shown) for receiving the return spring 44, and the return spring 44 can act on the side wall of the pressing piece 43 and make the pressing piece 43 always have a tendency to move toward the stopper piece 422 of the bushing 42. When the electromagnetic power-off brake is in a power-on state, the pressing sheet 43 can be attracted by the magnetic yoke assembly 410 and overcomes the elastic force of the return spring 44 to be far away from the brake block 422 of the shaft sleeve 42, so that the brake block 422 of the shaft sleeve 42 is not in contact with the pressing sheet 43 and can freely rotate along with the roller screw. When the electromagnetic power-off brake is in a power-off state, the magnetic yoke assembly 410 of the brake body 41 releases the pressing sheet 43, and the pressing sheet 43 is attached to the brake sheet 422 of the shaft sleeve 42 under the elastic force of the return spring 44 to play a braking role, so that the ball screw 31 is locked in time.

Referring to fig. 4 and 5, the coupling 10 includes a first connection sleeve 11 and a second connection sleeve 12. The first connecting sleeve 11 and the second connecting sleeve 12 are each substantially cylindrical in shape and are connected together by respective ends. The first coupling sleeve 11 has a first hole 110 axially therethrough into which a power take-off shaft 300 of the drive motor 30 extends. The second connecting sleeve 12 is detachably connected to the first connecting sleeve 11, and has a second hole 120 axially opened for the connecting end of the ball screw 31 to extend into.

Referring to fig. 5, the end of the first connecting sleeve 11 has a first flange 111 extending radially outward, and the end of the second connecting sleeve 12 has a second flange 121 extending radially outward. The first flange 111 and the second flange 121 are connected together by a locking bolt 13, wherein a washer 130 is arranged between the first flange 111 and the second flange 121 to increase the firmness of the connection between the first connecting sleeve 11 and the second connecting sleeve 12.

Referring to fig. 5, the first hole 110 of the first connecting sleeve 11 is a first tapered hole that penetrates axially, and the inner diameter of the first tapered hole near the end of the first flange 111 is smaller than the inner diameter of the corresponding end far from the first flange 111. The taper of the first tapered hole can be selected to be 1:8-1:15, and particularly, the taper of the first tapered hole is preferably 1: 10. Correspondingly, the outer peripheral wall of the power take-off shaft 300 of the driving motor 30 may be provided as a tapered section fitted with a first tapered hole having the same taper as that of the end of the power take-off shaft 300 of the driving motor 30. More specifically, the inner wall of the first hole 110 has a positioning groove 112 opened axially, and the outer wall of the power output shaft 300 of the driving motor 30 may have at least one positioning protrusion (not shown), so that the positioning protrusion of the power output shaft 300 of the driving motor 30 can slide into the positioning groove 112 of the first connecting sleeve 11 during assembly. Due to the structural design of the key groove, the first connecting sleeve 11 and the power output shaft 300 of the driving motor 30 are connected more firmly, and the problem that the first connecting sleeve and the power output shaft slip in the transmission process is solved.

Referring to fig. 3, the power take-off shaft 300 of the driving motor 30 may be coupled with the locker 14 adjustable in the axial direction thereof. Specifically, the locking member 14 is a locking nut screwed to the connecting end of the power output shaft 300 of the driving motor 30, and a stopper 15 is provided between the locking nut and the end wall of the first coupling sleeve 11. After the power output shaft 300 of the driving motor 30 passes through the first hole 110, the locking member 14 correspondingly connected to the end of the power output shaft 300 of the driving motor 30 can be pressed against the end wall of the first connecting sleeve 11 along the axial direction, so that the first connecting sleeve 11 and the power output shaft 300 of the driving motor 30 are locked along the radial direction.

Referring to fig. 3 and 5, the end wall of the second connecting sleeve 12 has a first stepped hole 122 for receiving the locking member 14, i.e., the first stepped hole 122 is located at one end where the second flange 121 is located, and corresponds to the locking member 14 connected to the power output shaft 300 of the driving motor 30. The first stepped hole 122 is designed to prevent the locking member 14 from interfering with the connection between the first connecting sleeve 11 and the second connecting sleeve 12.

Referring to fig. 5, the second connection sleeve 12 is connected to the upper end of the ball screw 31 by the expansion sleeve assembly 20. The end of the second hole 120 of the second connecting sleeve 12 is a second stepped hole 123, and the second stepped hole 123 is located at one end of the second connecting sleeve 12 far away from the second flange 121. The expansion sleeve assembly 20 is disposed in the second stepped hole 123, and the upper end of the ball screw 31 can extend into the expansion sleeve assembly 20.

With continued reference to fig. 5, the expansion sleeve assembly 20 includes a first expansion sleeve 21 and a second expansion sleeve 22. The second expansion sleeve 22 is sleeved on the upper end of the ball screw 31, and the first expansion sleeve 21 is sleeved outside the second expansion sleeve 22 and is matched with the second expansion sleeve 22 through a conical surface. The end face of the first expansion sleeve 21 is provided with a plurality of connecting holes 210 arranged at intervals along the circumferential direction, the end part of the second expansion sleeve 22 is provided with a convex edge extending outwards in the radial direction, and the expansion bolt 23 passes through the convex edge of the second expansion sleeve 22 to be connected into the connecting holes 210 of the first expansion sleeve 21. In the process of screwing the expansion bolt 23, the expansion sleeve assembly 20 can be deformed in the radial direction, so that the second connecting sleeve 12, the expansion sleeve assembly 20 and the ball screw 31 are held together.

Claims

1. A high-speed broaching machine comprising:

a bed (33);

a slide carriage (32) which is arranged on the lathe bed (33) in a manner of moving up and down;

the driving motor (30) is arranged on the lathe bed (33), and a power output shaft (300) of the driving motor is connected with the slide carriage (32) through a ball screw (31) so as to drive the slide carriage (32) to move up and down;

it is characterized by also comprising:

and the braking device (40) is arranged on the lathe bed (33), is in signal communication with a control system, and can act on the ball screw (31) or the power output shaft (300) of the driving motor (30), so that the corresponding ball screw (31) or the power output shaft (300) of the driving motor (30) is locked after the driving motor (30) is powered off.

2. The high-speed broaching machine according to claim 1, wherein: the driving motor (30) is arranged on a top plate (331) of the lathe bed (33), the upper end of the ball screw (31) penetrates out of the top plate (331) of the lathe bed (33) and is connected with a power output shaft (300) of the driving motor (30) through a coupler (10), and the braking device (40) is arranged on the top plate (331) of the lathe bed (33) and acts on the upper end of the ball screw (31).

3. The high-speed broaching machine according to claim 2, wherein: the braking device (40) is an electromagnetic power-off brake.

4. The high-speed broaching machine according to claim 3, wherein: the electromagnetic power-off brake comprises:

a brake body (41) having a yoke assembly (410);

a sleeve (42) which comprises an annular connecting part (421) sleeved and connected with the upper end part of the ball screw (31) and a brake block (422) extending outwards from the annular connecting part (421) in the radial direction, wherein a friction plate (423) is arranged on the side wall of the brake block (422);

the pressing sheet (43) is sleeved on the annular connecting part (421) of the shaft sleeve (42), is positioned between the brake main body (41) and the brake block (422) of the shaft sleeve (42), and can be attracted by the magnetic yoke component (410) under the electrified state to be away from the brake block (422) of the shaft sleeve (42);

and a return spring (44) which is provided in the brake body (41) and can act on the pressing piece (43) to make the pressing piece (43) always have a tendency of moving towards the brake piece (422) of the shaft sleeve (42).

5. The high-speed bench according to any one of claims 2 to 4, wherein: the coupler (10) comprises a first connecting sleeve (11) and a second connecting sleeve (12), the first connecting sleeve (11) is basically cylindrical and is provided with a first hole (110) which axially penetrates through the first connecting sleeve and is used for a power output shaft (300) of a driving motor (30) to extend into, the second connecting sleeve (12) is also basically cylindrical and can be detachably connected with the first connecting sleeve (11), the second hole (120) which is axially arranged and is used for an upper end of a ball screw (31) to extend into is arranged, the first hole (110) is a first conical hole, the end part of the power output shaft (300) of the driving motor (30) is provided with a conical section which is matched with the first conical hole, the conical degree of the first conical hole is the same as that of the power output shaft (300) of the driving motor (30), and after the power output shaft (300) of the driving motor (30) passes through the first hole (110), the locking nut correspondingly connected to the end part of the power output shaft (300) of the driving motor (30) can be pressed on the end wall of the first connecting sleeve (11) in the axial direction, so that the first connecting sleeve (11) and the power output shaft (300) of the driving motor (30) are locked in the radial direction, an expansion sleeve assembly (20) is arranged in the second hole (120) of the second connecting sleeve (12), a plurality of connecting holes (210) are formed in the end wall of the expansion sleeve assembly (20) in the circumferential direction, and expansion bolts (23) capable of enabling the expansion sleeve assembly (20) to deform in the radial direction are arranged in the connecting holes (210).

6. The high-speed broaching machine according to claim 5, wherein: the inner wall of the first hole (110) is provided with a positioning groove (112) which is axially arranged, and the outer wall of the conical section of the power output shaft (300) of the driving motor (30) is provided with a positioning lug corresponding to the positioning groove (112).

7. The high-speed broaching machine according to claim 6, wherein: the taper of the first taper hole is 1:8-1: 15.

8. The high-speed broaching machine according to claim 5, wherein: the end part of the first connecting sleeve (11) is provided with a first flange (111) extending outwards in the radial direction, the end part of the second connecting sleeve (12) is provided with a second flange (121) extending outwards in the radial direction, and the first flange (111) and the second flange (121) are connected through a locking bolt (13).

9. The high-speed broaching machine according to claim 5, wherein: the end wall of the second connecting sleeve (12) is provided with a first stepped hole (122) for accommodating a lock nut corresponding to the lock nut connected to a power output shaft (300) of the driving motor (30).

10. The high-speed broaching machine according to claim 5, wherein: the port in the second hole (120) of second adapter sleeve (12) has second step hole (123) corresponding to the upper end of ball (31), tight cover subassembly (20) expand locates in this second step hole (123), tight cover subassembly (20) expand includes that first tight cover (21) and the tight cover (22) of second expand, tight cover (22) cover of second expand is established on the upper end of ball (31), tight cover (21) cover of first expanding is established outside the tight cover (22) of second expand to expand tight cover (22) with the second and pass through conical surface cooperation, be equipped with on tight cover (21) of first expanding connecting hole (210), tight bolt (23) that expands pass tight cover (22) of second expand and connect in tight cover (210) of first tight cover (21) of expanding.