CN218964067U

CN218964067U - Numerical control reducing boring head

Info

Publication number: CN218964067U
Application number: CN202223528658.9U
Authority: CN
Inventors: 赵慎亮
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-05-05
Anticipated expiration: 2032-12-29

Abstract

The utility model provides a numerical control variable diameter boring head, which comprises: the device comprises a stator, a rotor, a static planet carrier, a rotary planet carrier, a straight ring gear and a reducing assembly, wherein one end of a driving rotor is arranged in a cavity, one end of the driving rotor positioned in the cavity is fixedly connected with a connecting shaft, and the connecting shaft is fixedly connected with the rotor; the two ends of the first planetary shaft are fixedly provided with a first gear and a second gear respectively, and the input gear is meshed with the first gear; the two ends of the second planetary shaft are respectively sleeved with a third gear and a fourth gear; the straight ring gear is meshed with the second gear and the third gear respectively, and the first bevel gear is meshed with the fourth gear; the variable-diameter assembly is arranged on the connecting shaft and the rotor and is used for adjusting the boring range of the boring cutter, and the problem that the power transmission device of the variable-diameter boring head in the prior art needs an oversized stator cavity due to offset relative to the rotation axis of the rotor in the stator cavity is solved.

Description

Numerical control reducing boring head

Technical Field

The utility model relates to the technical field of numerical control machining tools, in particular to a numerical control variable-diameter boring head.

Background

In the field of machining, boring is a cutting process for enlarging the inner diameter of a circular profile by using a cutter, and the existing boring heads are mostly arranged at the end part of a main spindle box of a machine tool so as to facilitate a numerical control machine tool to precisely machine parts with complex shapes or internal structures. The publication CN205271553U discloses a numerical control flat rotating disc, which solves the disadvantages of various flat rotating discs, but the planetary mechanism for power transmission is arranged in an offset manner (arranged on one side of the rotor connecting shaft), so that the larger the rotating space is required when the planet carrier rotates in the cavity of the stator, and the larger the planet carrier, the larger the stator cavity is required.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides a numerical control variable-diameter boring head, which solves the problem that the power transmission device of the variable-diameter boring head in the prior art is offset relative to the rotation axis of a rotating piece in a stator cavity to cause the need of an oversized stator cavity.

According to an embodiment of the present utility model, a numerical control variable diameter boring head includes: the device comprises a stator, a rotor, a static planet carrier, a rotary planet carrier, a straight ring gear and a reducing assembly, wherein a cavity is formed in the stator, one end of a driving rotor is rotationally arranged in the cavity, one end of the driving rotor is connected with a machine tool spindle through a key, the other end of the driving rotor, which is positioned in the cavity, is fixedly connected with a connecting shaft, and the connecting shaft is fixedly connected with the rotor; the static planet carrier is fixedly arranged in a cavity of the stator, a first planet shaft is arranged on the static planet carrier, a first gear and a second gear are respectively and fixedly arranged at two ends of the first planet shaft, an input gear is fixedly arranged on the end face of the driving rotor, and the input gear is meshed with the first gear; the rotary planet carrier is sleeved on the connecting shaft through a bearing, a second planet shaft is rotationally arranged on the rotary planet carrier, and a third gear and a fourth gear are sleeved at two ends of the second planet shaft respectively; the straight-tooth ring is sleeved on the connecting shaft through a needle bearing, the straight-tooth ring is meshed with the second gear and the third gear respectively, a first bevel gear is sleeved on the connecting shaft through the needle bearing, and the first bevel gear is meshed with the fourth gear; the variable-diameter assembly is arranged on the connecting shaft and the rotor, the variable-diameter assembly is meshed with the first bevel gear for transmission, the boring cutter is arranged on the variable-diameter assembly, and the variable-diameter assembly is used for adjusting the boring range of the boring cutter.

Compared with the prior art, the utility model has the following beneficial effects: the static planet carrier and the rotary planet carrier which are rotationally connected to the connecting shaft are arranged in the cavity of the stator, so that the rotation axes of the static planet carrier and the rotary planet carrier are concentric with the connecting shaft and the rotor, and parts for transmitting power are arranged in the cavity of the stator, on the static planet carrier and on the rotary planet carrier, so that when the U-shaft does not need to be fed, the first bevel gear can synchronously rotate in the same direction with the rotor and the connecting shaft; when the U-axis needs to be fed, the first bevel gear, the rotor and the connecting shaft can move relatively, so that the boring range of the boring cutter is changed, the design of parts is compact, the layout is ingenious, the space in the cavity of the stator is effectively utilized, the transmission is precise and stable, and the long-time maintenance of the precision is facilitated.

Further, the reducing assembly includes: the screw rod is rotationally arranged in the rotor, a second conical tooth is arranged on the screw rod and meshed with the first conical tooth, a screw seat is sleeved on the screw rod, after the screw seat is positioned by the positioning block, the positioning block is fixedly connected with the sliding block through a screw, a cutter holder is arranged on the sliding block, and a reducing driving assembly used for driving the first conical tooth to rotate is further arranged in a cavity of the stator.

Further, the variable diameter drive assembly includes: the servo motor is fixedly arranged outside the stator and fixedly connected with the stator, a first belt wheel is arranged at the output end of the servo motor, the worm is rotationally arranged in a cavity of the stator, a second belt wheel is arranged at one end of the worm, a synchronous belt is sleeved on the first belt wheel and the second belt wheel, the worm is meshed with the worm wheel, and the worm wheel is connected with the rotary planet carrier through a screw.

Further, a rectangular guide rail is arranged on the end face of the rotor.

Further, the driving rotor is connected with the connecting shaft through a hinging screw, and the connecting shaft is connected with the rotor through the hinging screw.

Drawings

FIG. 1 is a schematic diagram of the overall installation of an embodiment of the present utility model.

Fig. 2 is a schematic cross-sectional view of an embodiment of the present utility model.

FIG. 3 is a schematic view of the distribution of parts in a mold cavity according to an embodiment of the present utility model.

Fig. 4 is another schematic cross-sectional view of an embodiment of the present utility model.

In the above figures: 1. a stator; 2. a rotor; 3. driving a rotor; 4. a cavity; 5. a connecting shaft; 6. a stationary planet carrier; 7. a first planet axle; 8. a first gear; 9. a second gear; 10. an input gear; 11. rotating the planet carrier; 12. a second planetary shaft; 13. a third gear; 14. a fourth gear; 15. straight gear ring; 16. a first bevel gear; 17. a screw rod; 18. a second bevel gear; 19. a nut seat; 20. a positioning block; 21. a slide block; 22. a motor; 23. a worm wheel; 24. a worm; 25. a first pulley; 26. a second pulley; 27. a synchronous belt.

Detailed Description

The technical scheme of the utility model is further described below with reference to the accompanying drawings and examples.

As shown in fig. 1-4, the embodiment of the utility model provides a numerical control variable diameter boring head, which comprises a stator 1, a rotor 2, a static planet carrier 6, a rotary planet carrier 11, a straight ring 15 and a variable diameter assembly, wherein a cavity 4 is arranged in the stator 1, a driving rotor 3 is rotationally arranged in the cavity 4, one end of the driving rotor 3 is connected with a machine tool spindle through a key, the other end of the driving rotor 3 is fixedly connected with a connecting shaft 5, and the connecting shaft 5 is fixedly connected with the rotor 2; the static planet carrier 6 is fixedly arranged in the cavity 4 of the stator 1, a first planet shaft 7 is arranged on the static planet carrier 6, a first gear 8 and a second gear 9 are respectively and fixedly arranged at two ends of the first planet shaft 7, an input gear 10 is fixedly arranged on the end face of the driving rotor 3, and the input gear 10 is meshed with the first gear 8; the rotary planet carrier 11 is sleeved on the connecting shaft 5 through a bearing, a second planet shaft 12 is rotatably arranged on the rotary planet carrier 11, and a third gear 13 and a fourth gear 14 are respectively sleeved at two ends of the second planet shaft 12; the straight tooth ring 15 is sleeved on the connecting shaft 5 through a needle bearing, the straight tooth ring 15 is meshed with the second gear 9 and the third gear 13 respectively, the connecting shaft 5 is also sleeved with a first bevel gear 16 through a needle bearing, and the first bevel gear 16 is meshed with the fourth gear 14; the variable diameter assembly is arranged on the connecting shaft 5 and the rotor 2, the variable diameter assembly is meshed with the first bevel gear 16 for transmission, a boring cutter is arranged on the variable diameter assembly, and the variable diameter assembly is used for adjusting the size of the boring range of the boring cutter. The reducing assembly includes: the screw rod 17, the screw rod 17 rotationally sets up in rotor 2, is equipped with second awl tooth 18 on the screw rod 17, second awl tooth 18 and first awl tooth 16 meshing, the cover is equipped with screw seat 19 on the screw rod 17, screw seat 19 is through locating piece 20 location back, through screw and slider 21 fixed connection, is equipped with the blade holder on the slider 21, still is equipped with in the die cavity 4 of stator 1 and is used for driving first awl tooth 16 pivoted reducing drive assembly. The reducing drive assembly includes: the servo motor 22 is fixedly arranged in the cavity 4 of the stator 1 and fixedly connected with the stator 1, a first belt wheel 25 is arranged at the output end of the servo motor 22, the worm 24 is rotationally arranged in the cavity 4 of the stator 1, a second belt wheel 26 is arranged at one end of the worm 24, a synchronous belt 27 is sleeved on the first belt wheel 25 and the second belt wheel 26, the worm 24 is meshed with the worm wheel 23, and the worm wheel 23 is connected with the rotary planet carrier 11 through a screw.

When the tool is required to do rotary motion, as shown in the direction S of fig. 1, (S is the rotary motion of a machine tool spindle driving rotor 2), the machine tool spindle is connected with a driving rotor 3 through a spindle end face key to drive the driving rotor 3 to rotate, the driving rotor 3 drives a connecting shaft 5 to rotate, the connecting shaft 5 drives the rotor 2 to rotate, and a tool apron is arranged on the end face of the rotor 2 through a sliding block 21, so that the main motion of the variable-diameter boring head, namely the rotary motion of the tool, is realized. Specifically, a T-shaped groove is formed in the sliding block 21, and the tool apron is fastened in the T-shaped groove of the sliding block 21 through a specially-made T-shaped block and a screw.

When the straight hole is machined, the U shaft does not do feed motion, at the moment, the motor 22 is not started, the machine tool main shaft drives the driving rotor 3 to rotate, the driving rotor 3 drives the input gear 10 to rotate, the input gear 10 drives the first gear 8 meshed with the input gear 10 to rotate, as the first gear 8 and the second gear 9 are fixedly arranged on the first planetary shaft 7, the third gear 13 and the fourth gear 14 are fixedly arranged at two ends of the second planetary shaft 12, and the second gear 9 and the third gear 13 are meshed with the straight ring 15, so that the fourth gear 14 drives the first bevel gear 16 to rotate, and in the working process, the static planet carrier 6 and the rotary planet carrier 11 are static, and all the first gear 8, the second gear 9, the third gear 13, the fourth gear 14 and the straight ring 15 only serve as intermediate wheels (namely, the intermediate wheels only change the rotating direction and do not change the total transmission ratio value of the planetary mechanism), namely the first bevel gear 16 and the rotor 2 synchronously rotate in the same direction, so that the slide block 21 does not move radially.

When the feeding of the U shaft is required, such as the U direction in fig. 1 (U is the movement direction of the slider), that is, when the variable diameter boring head is required to process the end face, the spherical surface, the conical hole, the R arc and the chamfer, the motor 22 is started, the rotor 2 does not rotate at this time, the first belt pulley 25 follows the rotation of the motor 22 and drives the second belt pulley 26 to rotate through the synchronous belt 27, so that the worm 24 drives the worm wheel 23 to rotate, the worm wheel 23 drives the rotary planet carrier 11 to synchronously rotate, at this time, the fourth gear 14 drives the first bevel gear 16 to rotate, so that the screw rod 17 also rotates when the first bevel gear 16 drives the second bevel gear 18 to rotate, and the nut seat 19 on the screw rod 17 drives the slider 21 to drive the cutter to perform the feeding movement of the U shaft, thereby changing the boring range of the boring tool on the tool holder (in the above description, it is assumed that there is no rotation movement of the cutter, namely, the rotor 2).

Further, a rectangular guide rail is provided on the end face of the rotor 2. The rotor 2 is provided with a specially-made rectangular guide rail with high precision, good wear resistance and strong shock absorption, and the specially-made rectangular guide rail is used for precisely guiding the movement of the sliding block 21 on the end face of the rotor 2.

Further, the driving rotor 3 is connected with the connecting shaft 5 through a hinging screw, and the connecting shaft 5 is connected with the rotor 2 through a hinging screw. The hinging screw is more stable in connection, and can prevent looseness between parts in the high-speed rotation process.

The device is connected with the end part of a spindle box or a ram of a machine tool through screws after being fastened and connected with a connecting flange, cutting force during machining, self gravity of the device and the like are transmitted to the spindle box or the ram of the machine tool through the connecting flange, when the device needs to be disassembled, the sliding block 21 is restored to the zero position, the power supply is disconnected, and then the screws between the connecting flange and the spindle box or the ram of the machine tool are disassembled.

The U-axis and other axes (X, W, V axes of the numerical control boring machine and X, Y, Z axes of the numerical control planer type milling) are in linkage interpolation, so that the machining of the special-shaped surface (such as an inner spherical surface, an R surface, a conical surface, threads and the like) of the workpiece can be conveniently finished.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered by the scope of the claims of the present utility model.

Claims

1. A numerical control variable diameter boring head, comprising:

the novel machine tool comprises a stator (1) and a rotor (2), wherein a cavity (4) is formed in the stator (1), a driving rotor (3) is rotationally arranged in the cavity (4), one end of the driving rotor (3) is connected with a machine tool spindle through a key, the other end of the driving rotor (3) is fixedly connected with a connecting shaft (5), and the connecting shaft (5) is fixedly connected with the rotor (2);

the static planet carrier (6), the static planet carrier (6) is fixedly arranged in the cavity (4) of the stator (1), a first planet shaft (7) is arranged on the static planet carrier (6), a first gear (8) and a second gear (9) are respectively fixedly arranged at two ends of the first planet shaft (7), an input gear (10) is fixedly arranged on the end face of the driving rotor (3), and the input gear (10) is meshed with the first gear (8);

the rotary planet carrier (11) is sleeved on the connecting shaft (5) through a bearing, a second planet shaft (12) is rotatably arranged on the rotary planet carrier (11), and a third gear (13) and a fourth gear (14) are respectively sleeved at two ends of the second planet shaft (12);

the straight gear ring (15) is sleeved on the connecting shaft (5) through a needle bearing, the straight gear ring (15) is meshed with the second gear (9) and the third gear (13) respectively, the connecting shaft (5) is also sleeved with a first bevel gear (16) through a needle bearing, and the first bevel gear (16) is meshed with the fourth gear (14);

the variable diameter assembly is arranged on the connecting shaft (5) and the rotor (2), the variable diameter assembly is in meshed transmission with the first conical teeth (16), the boring cutter is arranged on the variable diameter assembly, and the variable diameter assembly is used for adjusting the boring range of the boring cutter.

2. The digitally controlled variable diameter boring head of claim 1 wherein the variable diameter assembly comprises: the screw rod (17), screw rod (17) rotationally set up in rotor (2), be equipped with second awl tooth (18) on screw rod (17), second awl tooth (18) and first awl tooth (16) meshing, the cover is equipped with screw seat (19) on screw rod (17), be equipped with locating piece (20) on screw seat (19), after locating piece (20) location, locating piece (20) pass through screw and slider (21) fixed connection, are equipped with the blade holder on slider (21), still are equipped with in die cavity (4) of stator (1) and are used for driving first awl tooth (16) pivoted reducing drive assembly.

3. A digitally controlled variable diameter boring head according to claim 2, wherein the variable diameter drive assembly comprises: the novel planetary gear set comprises a servo motor (22), a worm (24) and a worm wheel (23), wherein the servo motor (22) is fixedly arranged outside a stator (1) and fixedly connected with the stator (1), a first belt wheel (25) is arranged at the output end of the servo motor (22), the worm (24) is rotationally arranged in a cavity (4) of the stator (1), a second belt wheel (26) is arranged at one end of the worm (24), a synchronous belt (27) is sleeved on the first belt wheel (25) and the second belt wheel (26), the worm (24) is meshed with the worm wheel (23), and the worm wheel (23) is connected with a rotary planet carrier (11) through a screw.

4. A numerical control variable diameter boring head according to claim 1, wherein: rectangular guide rails are arranged on the end faces of the rotor (2).

5. A numerical control variable diameter boring head according to claim 1, wherein: the driving rotor (3) is connected with the connecting shaft (5) through a hinging screw, and the connecting shaft (5) is connected with the rotor (2) through the hinging screw.