Workpiece clamping device for vertical lathe

Abstract

The utility model relates to a workpiece clamping device for a vertical lathe, and belongs to the technical field of vertical lathe workpiece clamping. The clamping device comprises an electric chuck, a clamping driving mechanism and a rotating driving mechanism, the electric chuck comprises a chuck body, a fluted disc and a plurality of clamping jaws, plane threads are arranged on the fluted disc, and tooth grooves meshed with the plane threads are formed in the clamping jaws. The clamping driving mechanism comprises a servo motor, under the action of the servo motor, the fluted disc rotates, and the clamping jaws feed on the chuck body in the radial direction to clamp or loosen a workpiece. The clamping device is simple in structure, convenient to operate and low in cost, the servo motor is adopted to drive the chuck, long-stroke clamping can be achieved, zero setting is not needed, the size of the clamping position can be adjusted according to the size of a remodeling product, clamping jaw clamping can be automatically adjusted, and the clamping device can be suitable for clamping of multiple varieties and small batches of workpieces.

Description

Technical Field

[0001] The utility model relates to a workpiece clamping device for a vertical lathe, belonging to the technical field of vertical lathe workpiece clamping. Background Art

[0002] The existing CNC vertical lathes mostly use hydraulic chucks for workpiece clamping. The hydraulic chuck includes a chuck body, claws, a hydraulic cylinder, an oil circuit system, etc. The hydraulic oil enters the hydraulic cylinder to make the piston of the hydraulic cylinder move forward, and the piston drives the claws to move outward. The claws are opened to place the workpiece in the claws. The hydraulic oil enters the hydraulic cylinder to make the piston move backward, and the piston drives the claws to move inward, and the claws clamp the workpiece.

[0003] The hydraulic chuck uses hydraulic pressure to transfer the clamping force of the jaws to the workpiece, thereby achieving the purpose of clamping the workpiece. The structure and oil circuit of the hydraulic chuck are complex, the configuration is multiple, and the cost is high. The hydraulic chuck has a small clamping stroke for clamping the workpiece, generally 12mm, and the clamping range is limited. The jaw position needs to be replaced when changing the model. The jaw adjustment needs to be zeroed, and the adjustment time is long. It is not suitable for clamping small batches and multiple varieties of workpieces. Summary of the invention

[0004] The utility model aims at the deficiencies in the prior art and provides a workpiece clamping device for a vertical lathe.

[0005] The utility model solves the above technical problems with the following technical solutions: A workpiece clamping device for a vertical lathe, comprising an electric chuck arranged on the lathe and a clamping drive mechanism for driving the jaws of the electric chuck to clamp or release the workpiece, and also comprising a rotation drive mechanism for driving the electric chuck to rotate;

[0006] The electric chuck comprises a chuck body, a toothed disc rotatably arranged on the chuck body, and a plurality of claws capable of radially feeding on the chuck body, wherein the toothed disc is provided with a planar thread, and the claws are provided with tooth grooves meshing with the planar thread;

[0007] The clamping drive mechanism includes a servo motor for driving the gear disc to rotate. The servo motor is arranged on the lathe. Under the action of the servo motor, the gear disc rotates, and the clamping claws radially feed on the chuck body to clamp or release the workpiece.

[0008] The beneficial effects of the utility model are: the electric chuck is directly used on the vertical lathe, and the servo motor drives the electric chuck to achieve the purpose of clamping the workpiece on the vertical lathe by the electric chuck. The structure is simple, the operation is convenient, and the cost is low. The servo motor is used to drive the chuck, which can achieve long-stroke clamping without zeroing. The clamping position size can be adjusted according to the size of the changed product, and the clamping claws can be automatically adjusted. It is suitable for clamping multiple varieties and small batches of workpieces. In addition, the servo clamping torque ensures the clamping force of the workpiece to avoid the adverse effects of insufficient clamping force.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the servo motor is connected to the gear disc via a transmission shaft.

[0011] The beneficial effect of adopting the above further solution is that the transmission shaft can realize power transmission between the servo motor and the gear disc, thereby realizing rotational driving of the gear disc.

[0012] Furthermore, the rotary drive mechanism includes a lathe spindle rotatably arranged on the lathe and a spindle drive mechanism for driving the lathe spindle to rotate, and the chuck body is arranged on the lathe spindle.

[0013] The beneficial effect of adopting the above further scheme is that the rotation of the lathe spindle can drive the electric chuck installed on the lathe spindle to rotate, such as adjusting the position of the claws of the electric chuck, and realizing the rotation processing of the workpiece when the claws clamp the workpiece.

[0014] Furthermore, the spindle driving mechanism includes a transmission wheel arranged on the lathe spindle, and the transmission wheel can transmit the power of the lathe to the lathe spindle.

[0015] The beneficial effect of adopting the above further solution is that the power of the lathe can be transmitted to the lathe spindle through the transmission wheel, thereby realizing the rotational drive of the electric chuck.

[0016] Furthermore, the interior of the lathe spindle is hollow and provided with a cavity for the transmission shaft to pass through.

[0017] The beneficial effect of adopting the above further solution is that it provides installation space for the transmission of the transmission shaft and avoids interference between the clamping or releasing of the workpiece by the clamping claw and the rotation drive of the electric chuck.

[0018] Furthermore, the transmission wheel is a belt pulley.

[0019] The beneficial effect of adopting the above further scheme is that the motor of the vertical lathe can transmit power to the pulley through the belt, thereby realizing the rotational drive of the lathe spindle and the electric chuck, so that the clamped workpiece can be rotated to realize processing on the vertical lathe.

[0020] Furthermore, the transmission shaft includes a first transmission shaft and a second transmission shaft arranged between the servo motor and the gear plate, and the first transmission shaft and the second transmission shaft and the first transmission shaft and the output shaft of the servo motor are connected respectively through couplings.

[0021] The beneficial effects of adopting the above further solution are that, on the one hand, the power transmission of the servo motor can be realized, and on the other hand, it is easy to install and disassemble, which is convenient for subsequent maintenance.

[0022] Furthermore, the servo motor is arranged on the lathe via a motor mounting frame.

[0023] The beneficial effect of adopting the above further solution is to achieve the positioning installation of the servo motor on the vertical lathe.

[0024] Furthermore, a speed reduction mechanism is provided between the servo motor and the gear disc.

[0025] The beneficial effect of adopting the above further solution is to reduce the rotation speed of the servo motor, realize the rotational drive of the gear disc, and further ensure the clamping force and clamping accuracy of the workpiece.

[0026] Furthermore, the reduction mechanism includes a fixed external gear and an eccentric gear arranged inside the external gear, the eccentric gear is provided with an eccentric sleeve, the transmission shaft is transmission-connected with the eccentric sleeve, the eccentric gear is provided with an outer gear ring, the external gear is provided with an inner gear ring that can mesh with the outer gear ring, the eccentric gear is provided with a plurality of transmission holes, the toothed disc is provided with a transmission pin, the lower end of the transmission pin extends into the transmission hole, and the eccentric gear transmits power to the toothed disc through the transmission pin to drive the toothed disc to rotate.

[0027] The beneficial effect of adopting the above further solution is that the outer gear is fixedly arranged, the transmission shaft and the toothed disc are coaxial with the outer gear, and the transmission shaft and the toothed disc rotate relative to the outer gear. The structure is simple and compact, the weight is light, and the transmission power is large. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the utility model;

[0029] Figure 2 It is a partial enlarged view of the electric chuck position of the utility model;

[0030] In the figure, 1, chuck body; 2, claw; 21, tooth groove; 3, toothed disc; 31, flat thread; 4, first transmission shaft; 5, second transmission shaft; 6, coupling; 7, lathe spindle; 8, transmission wheel; 9, servo motor; 10, motor mounting bracket; 11, external gear; 12, eccentric gear; 13, eccentric sleeve; 14, transmission pin; 15, lathe. DETAILED DESCRIPTION

[0031] The principles and features of the present invention are described below in conjunction with examples. The examples are only used to explain the present invention and are not used to limit the scope of the present invention.

[0032] like Figure 1 and Figure 2 As shown, a workpiece clamping device for a vertical lathe comprises an electric chuck arranged on the lathe and a clamping drive mechanism for driving a clamping jaw 2 of the electric chuck to clamp or release a workpiece, and also comprises a rotation drive mechanism for driving the electric chuck to rotate;

[0033] The electric chuck comprises a chuck body 1, a toothed disc 3 rotatably arranged on the chuck body 1, and a plurality of claws 2 capable of radially feeding on the chuck body 1, wherein the toothed disc 3 is provided with a planar thread 31, and the claws 2 are provided with tooth grooves 21 meshing with the planar thread 31;

[0034] The clamping drive mechanism includes a servo motor 9 for driving the toothed disc 3 to rotate. The servo motor 9 is arranged on the lathe. Under the action of the servo motor 9, the toothed disc 3 rotates, and the clamping claw 2 radially feeds on the chuck body 1 to clamp or release the workpiece.

[0035] The servo motor 9 is connected to the toothed disc 3 via a transmission shaft. The transmission shaft can realize power transmission between the servo motor 9 and the toothed disc 3, thereby realizing rotational driving of the toothed disc 3.

[0036] The rotary drive mechanism includes a lathe spindle 7 rotatably arranged on the lathe and a spindle drive mechanism for driving the lathe spindle 7 to rotate, and the chuck body 1 is arranged on the lathe spindle 7. The rotation of the lathe spindle 7 can drive the electric chuck installed on the lathe spindle 7 to rotate. For example, the position of the jaws 2 of the electric chuck can be adjusted, and the rotation processing of the workpiece can also be realized when the jaws 2 clamp the workpiece.

[0037] The spindle drive mechanism includes a transmission wheel 8 arranged on the lathe spindle 7, and the transmission wheel 8 can transmit the power of the lathe to the lathe spindle 7. The power of the lathe motor can be transmitted to the lathe spindle 7 by a belt using the power of the lathe, thereby realizing the rotation drive of the electric chuck.

[0038] The lathe spindle 7 is hollow inside and provided with a cavity for the transmission shaft to pass through, so as to provide installation space for the transmission of the transmission shaft and avoid interference between the clamping or releasing of the workpiece by the clamping claw 2 and the rotation drive of the electric chuck.

[0039] The transmission wheel 8 is a belt pulley. The motor of the vertical lathe can transmit power to the belt pulley through the belt, so as to realize the rotation drive of the lathe spindle 7 and the electric chuck, so that the clamped workpiece can be rotated to realize the processing on the vertical lathe.

[0040] The transmission shaft includes a first transmission shaft 4 and a second transmission shaft 5 arranged between the output shaft of the servo motor 9 and the gear plate 3, and the first transmission shaft 4 and the second transmission shaft 5 and the first transmission shaft 4 and the output shaft of the servo motor 9 are respectively connected by a coupling 6. On the one hand, the power transmission of the servo motor 9 can be realized, and on the other hand, it is convenient to install and disassemble, which is convenient for subsequent maintenance.

[0041] The first transmission shaft 4 is hollow inside.

[0042] The second transmission shaft 5 is provided with a cavity inside, so that the weight of the transmission shaft can be reduced, thereby reducing energy consumption.

[0043] The servo motor 9 is arranged on the lathe 15 through the motor mounting frame 10, so as to realize the positioning and installation of the servo motor 9 on the vertical lathe.

[0044] A speed reduction mechanism is also provided between the servo motor 9 and the toothed disc 3. The rotation speed of the servo motor 9 is reduced to realize the rotational drive of the toothed disc 3, thereby further ensuring the clamping force and clamping accuracy of the workpiece.

[0045] The deceleration mechanism includes a fixed external gear 11 and an eccentric gear 12 arranged in the external gear 11, an eccentric sleeve 13 is arranged on the eccentric gear 12, the transmission shaft is connected to the eccentric sleeve 13, the eccentric gear 12 is provided with an external gear ring, the external gear 11 is provided with an internal gear ring that can mesh with the external gear ring, the eccentric gear 12 is provided with a plurality of transmission holes, the toothed disc 3 is provided with a transmission pin 14, the lower end of the transmission pin 14 extends into the transmission hole, and the eccentric gear 12 transmits power to the toothed disc 3 through the transmission pin 14 to drive the toothed disc 3 to rotate. The external gear 11 is fixedly arranged, the transmission shaft and the toothed disc 3 are coaxial with the external gear 11, and the transmission shaft and the toothed disc 3 rotate relative to the external gear 11. The structure is simple and compact, the weight is light, and the transmission power is large. There is a rotation hole in the eccentric sleeve 13, and the second transmission shaft 5 is inserted into the rotation hole, so as to transmit the power of the servo motor to the eccentric gear 12.

[0046] The utility model installs an electric chuck on the lathe spindle 7 of the vertical lathe, and installs a servo motor 9 on the bed of the vertical lathe. Specifically, the servo motor 9 is set on the bed of the lathe through a motor mounting frame 10. The servo motor 9 realizes the transmission connection between the servo motor 9 and the gear plate 3 of the electric chuck through a coupling 6, a first transmission shaft 4, a coupling 6 and a second transmission shaft 5. The clamping process of the jaw 2 of the electric chuck, the jaw 2 is released: the control system such as PLC control will reserve a certain clamping space according to the diameter of the clamped product, and send the movement data to the servo motor 9. The servo motor 9 drives the toothed disc 3 of the electric chuck to rotate through the transmission shaft. The tooth groove 21 on the jaw 2 cooperates with the flat thread 31 on the toothed disc 3, and the jaw 2 performs radial movement along the radial slideway on the chuck body 1 to realize the loosening of the jaw 2; chuck clamping: after the workpiece to be clamped is placed between the jaws 2, the control system controls the servo motor 9 to execute torque to clamp the workpiece. After clamping the workpiece, the servo motor 9 stops rotating to realize the clamping of the workpiece; when the workpiece needs to be rotated during the processing of the workpiece, the lathe spindle 7 rotates under the action of the lathe motor, and the electric chuck is installed on the lathe spindle 7. The electric chuck rotates with the workpiece clamped, and the output shaft of the servo motor 9 rotates passively, thereby realizing the processing of the workpiece on the vertical lathe 15.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A workpiece clamping device for a vertical lathe, characterized in that: It comprises an electric chuck arranged on a lathe (15) and a clamping drive mechanism for driving a clamping claw (2) of the electric chuck to clamp or release a workpiece, and also comprises a rotation drive mechanism for driving the electric chuck to rotate; The electric chuck comprises a chuck body (1), a toothed disc (3) rotatably arranged on the chuck body (1), and a plurality of claws (2) capable of radially feeding on the chuck body (1), the toothed disc (3) being provided with a planar thread (31), and the claws (2) being provided with tooth grooves (21) meshing with the planar thread (31); The clamping drive mechanism comprises a servo motor (9) for driving the toothed disc (3) to rotate. The servo motor (9) is arranged on the lathe. Under the action of the servo motor (9), the toothed disc (3) rotates, and the clamping claw (2) radially feeds on the chuck body (1) to clamp or release the workpiece.

2. The workpiece clamping device for a vertical lathe according to claim 1, characterized in that: The servo motor (9) is connected to the gear disc (3) via a transmission shaft.

3. The workpiece clamping device for a vertical lathe according to claim 2, characterized in that: The rotary drive mechanism comprises a lathe spindle (7) rotatably arranged on the lathe and a spindle drive mechanism for driving the lathe spindle (7) to rotate, and the chuck body (1) is arranged on the lathe spindle (7).

4. The workpiece clamping device for a vertical lathe according to claim 3, characterized in that: The spindle drive mechanism comprises a transmission wheel (8) arranged on the lathe spindle (7), and the transmission wheel (8) is capable of transmitting the power of the lathe (15) to the lathe spindle (7).

5. The workpiece clamping device for a vertical lathe according to claim 3, characterized in that: The lathe spindle (7) is hollow inside and is provided with a cavity for the transmission shaft to pass through.

6. The workpiece clamping device for a vertical lathe according to claim 4, characterized in that: The transmission wheel (8) is a belt pulley.

7. The workpiece clamping device for a vertical lathe according to claim 2, characterized in that: The transmission shaft comprises a first transmission shaft (4) and a second transmission shaft (5) which are arranged between the servo motor (9) and the toothed disc (3); the first transmission shaft (4) and the second transmission shaft (5) and the first transmission shaft (4) and the output shaft of the servo motor (9) are respectively connected via a coupling (6).

8. The workpiece clamping device for a vertical lathe according to claim 1, characterized in that: The servo motor (9) is arranged on the lathe via a motor mounting frame (10).

9. The workpiece clamping device for a vertical lathe according to any one of claims 2 to 7, characterized in that: A speed reduction mechanism is also provided between the servo motor (9) and the toothed disc (3).

10. The workpiece clamping device for a vertical lathe according to claim 9, characterized in that: The speed reduction mechanism comprises a fixedly arranged external gear (11) and an eccentric gear (12) arranged inside the external gear (11); the eccentric gear (12) is provided with an eccentric sleeve (13) which is transmission-connected to the transmission shaft; the eccentric gear (12) is provided with an external gear ring; the external gear (11) is provided with an internal gear ring which can mesh with the external gear ring; the eccentric gear (12) is provided with a plurality of transmission holes; the toothed disc (3) is provided with a transmission pin (14); the lower end of the transmission pin (14) extends into the transmission hole; the eccentric gear (12) transmits power to the toothed disc (3) through the transmission pin (14) to drive the toothed disc (3) to rotate.

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