CN218836943U - A axle drive arrangement for digit control machine tool - Google Patents
A axle drive arrangement for digit control machine tool Download PDFInfo
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- CN218836943U CN218836943U CN202223282154.3U CN202223282154U CN218836943U CN 218836943 U CN218836943 U CN 218836943U CN 202223282154 U CN202223282154 U CN 202223282154U CN 218836943 U CN218836943 U CN 218836943U
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Abstract
The utility model provides a A axle drive arrangement for digit control machine tool, this A axle drive arrangement can realize the machining center to spare part automatic clamping's control requirements such as hydraulic pressure/pneumatics through add the rotary circuit in inner structure. The device comprises a rotary mandrel, a power device, a transmission device and a rotary loop, wherein the rotary loop comprises a hydraulic shaft sleeve, the hydraulic shaft sleeve is sleeved at the rear part of the rotary mandrel, a plurality of rotary oil seals are arranged on the fitting surface of the hydraulic shaft sleeve and the rotary mandrel, a plurality of passages are arranged in the hydraulic shaft sleeve, a plurality of passages are correspondingly arranged in the rotary mandrel, a through hole for communicating the hydraulic shaft sleeve with the passages of the rotary mandrel is arranged between every two adjacent rotary oil seals, a plurality of sealed rotary loops are formed between the hydraulic shaft sleeve and the rotary mandrel, the front end of each rotary loop is led out through the output end of the rotary mandrel, and the rear end of the rotary loop is led out through the through hole in the rear cover plate.
Description
Technical Field
The utility model belongs to a digit control machine tool technical field relates to a digit control machine tool's functional unit, concretely relates to be used for digit control machine tool A axle drive arrangement. The design of the A-axis driving device can meet the requirements of large-torque and high-precision rotation control, a multi-channel rotating hydraulic and pneumatic circuit is integrated, the control requirements of a four-axis or five-axis machining center on the A-axis are met, and the hydraulic and pneumatic control requirements of the machining center on automatic part clamping are met.
Background
Four controllable axes are arranged in a four-axis linkage mode, interpolation motion control can be simultaneously carried out on the four axes, namely simultaneous linkage control can be realized on the four axes, and the four axes of the four-axis numerical control machining center, namely an X axis, a Y axis, a Z axis and an A axis (rotating around the X axis), have the advantages of being high in machining speed and machining precision.
Compared with a four-axis numerical control machine tool, the five-axis numerical control machining center adds an additional rotating shaft, and the fifth axis rotates around the Y axis and is also called as the B axis. The workpiece may also be rotated on some machines, sometimes referred to as the b-axis or c-axis. The five-axis numerical control machining center has strong practicability and can be used for manufacturing complex high-precision parts.
A shaft A transmission device used in a traditional four-shaft or five-shaft machining center has a structure with a plurality of modes such as worm and gear transmission, roller cam transmission, torque motor transmission and the like, but as a common shaft A driving device in the market, a hydraulic and pneumatic circuit is not designed in the common shaft A driving device, and the requirements of the machining center on the hydraulic and pneumatic control of an automatic clamping part cannot be met.
Disclosure of Invention
The utility model provides a A axle drive arrangement for digit control machine tool, this A axle drive arrangement can realize the machining center to spare part automatically clamped's control requirements such as hydraulic pressure/pneumatics through add rotary circuit in inner structure.
The utility model has the following concrete technical scheme:
a-axis driving device for a numerical control machine tool comprises a rotary mandrel, a power device, a transmission device and a rotary circuit, wherein
The power device comprises a torque motor rotor and a torque motor stator, wherein the torque motor is fixedly arranged on the base body, and the torque motor rotor drives a transmission device connected with the torque motor rotor to rotate;
the transmission device comprises a fixed ring and a turntable bearing, wherein a rotary mandrel is connected with a torque motor rotor through the fixed ring, the rotary mandrel is assembled with the fixed ring through a pin shaft, the turntable bearing is arranged on the base body and sleeved on the pin shaft, and the rotary mandrel and the torque motor rotor are connected into a whole through the fixed ring, so that 360-degree random rotation of the rotary mandrel can be realized;
the rotating loop comprises a hydraulic shaft sleeve, the hydraulic shaft sleeve is sleeved at the rear part of the rotating mandrel, a plurality of rotating oil seals are arranged on the matching surface of the hydraulic shaft sleeve and the rotating mandrel, and two ends of the matching surface of the hydraulic shaft sleeve and the rotating mandrel are connected by adopting bearings; the two ends of the seat body are provided with a front cover plate and a rear cover plate, and the rear end surface of the hydraulic shaft sleeve is fixedly connected with the rear cover plate; the bearing on the matching surface of the hydraulic shaft sleeve and the rotary mandrel specifically adopts a deep groove ball bearing;
a plurality of passages are arranged in the hydraulic shaft sleeve, a plurality of passages are correspondingly arranged in the rotary mandrel, a through hole for communicating the hydraulic shaft sleeve with the passages of the rotary mandrel is arranged between every two adjacent rotary oil seals, a plurality of sealed rotary loops are formed between the hydraulic shaft sleeve and the rotary mandrel, the front end of each rotary loop is respectively led out through the output end of the rotary mandrel, and the rear end of each rotary loop is led out through the through hole in the rear cover plate and is particularly connected to a hydraulic or pneumatic control part of a machining center through the through hole in the rear cover plate;
furthermore, the rotating circuits are totally designed with 11 rotating circuits, and hydraulic and/or pneumatic and/or coolant control circuits are respectively provided for an automatic clamp or a C shaft connected with the rotary spindle, so that the control requirements of different machine tools are met.
Furthermore, the braking device comprises a pneumatic clamp and a braking ring, wherein the pneumatic clamp is arranged on the base body, and the braking ring is arranged on a pin shaft for connecting the rotary mandrel and the fixing ring and is used for braking control; the pneumatic clamp is internally provided with a corresponding elastic structure, the pneumatic clamp and the brake ring are in a tension state under the action of elastic force to brake the transmission device, when external compressed air is introduced into the closed cavity of the pneumatic clamp, the pneumatic clamp deforms, the brake ring is separated, and the transmission device can freely rotate;
further, the feedback device comprises an annular grating ruler arranged on the moving part of the turntable bearing and a reading head arranged on the fixed part of the turntable bearing, and is used for detecting the rotating speed and the position of the rotary spindle; when the bearing rotates, the current position and speed are accurately measured through the reading head and fed back to the torque motor driving module;
furthermore, the rotary mandrel is a shoulder shaft, the power device is installed on the shoulder part, the hydraulic shaft sleeve is installed on the rear part of the rotary mandrel, and the assembled torque motor rotor is sleeved outside the hydraulic shaft sleeve and a space is reserved between the hydraulic shaft sleeve and the hydraulic shaft sleeve.
Compared with the prior art, the utility model have following beneficial effect:
the utility model discloses a be used for digit control machine tool A axle drive arrangement through add rotatory circuit in inner structure, provides rotatory route for machining center to the control of automatic clamping part, satisfies multiple control demand.
The utility model discloses a A axle drive arrangement structural design can satisfy big moment of torsion, high accuracy rotation control requirement, satisfies machining center to realize part automatic clamping's hydraulic pressure, pneumatic control requirement simultaneously.
The utility model discloses a arresting gear is for can effectively controlling the braking of butt gyration mandrel.
The utility model discloses a feedback device adopts the annular grating to replace and passes the circular grating, solves the problem of the mounted position limitation of circular grating, accurate measurement torque motor rotor current position and speed.
Drawings
FIG. 1 is a schematic structural view of an A-axis driving device;
FIG. 2 is an external view of the A-axis drive;
FIG. 3 is a cross-sectional view of a hydraulic bushing;
FIG. 4 is a rear view of the rear cover plate of the A-axis drive;
FIG. 5 is a schematic view of the connection between the A-axis driving device and the C-axis cradle body;
in the figure: 11-a front cover plate; 12-a seat body; 13-a rear cover plate; 14-a wire cover; 21-a rotating mandrel; 22-turntable bearing; 31-a fixed ring; 32-torque motor rotor; 33-a torque motor stator; 41-a pneumatic clamp; 42-a brake ring; 51-annular grating ruler; 52-a read head; 53-deep groove ball bearing; 54-hydraulic shaft sleeve; 55-rotary oil seal; 56-deep groove ball bearing; 1-a axis drive; 2-C axis cradle body.
Detailed Description
The first embodiment is as follows:
as shown in fig. 1, the a-axis driving device for a numerical control machine tool of the present invention includes a revolving spindle 21, a power device, a transmission device, a revolving circuit, a braking device and a feedback device, and the a-axis driving device has an external shape as shown in fig. 2.
The power device is used for providing power for the A-axis driving device; the torque motor comprises a torque motor rotor 32 and a torque motor stator 33, wherein the torque motor stator 33 is arranged on the base body 12, and the torque motor rotor 32 drives a transmission device connected with the torque motor rotor to rotate;
the transmission device is used for connecting the power device with the rotary mandrel; including solid fixed ring 31 and revolving stage bearing 22, gyration mandrel 21 and torque motor rotor 32 are connected through solid fixed ring 31, and gyration mandrel 21 and solid fixed ring 31 are through the round pin axle assembly, and revolving stage bearing 22 installs on the pedestal and suit are in on the round pin axle, and transmission passes through solid fixed ring 31 and connects gyration mandrel 21 and torque motor rotor 32 as an organic whole, can realize 360 degrees random rotations of gyration mandrel 21.
The rotating loop forms a hydraulic/pneumatic loop in the A-axis driving device, and the input of the fixed end is converted into the output of the rotating end; the hydraulic oil seal device comprises a hydraulic shaft sleeve 54, wherein the hydraulic shaft sleeve 54 is sleeved at the rear part of the rotary mandrel 21, a plurality of rotary oil seals 55 are arranged on the matching surface of the hydraulic shaft sleeve 54 and the rotary mandrel 21, two ends of the matching surface of the hydraulic shaft sleeve 54 and the rotary mandrel 21 are connected through bearings, and the bearings are a deep groove ball bearing 53 and a deep groove ball bearing 56. The front end of the seat body is provided with a front cover plate 21, the rear end is provided with a rear cover plate 13, the rear end face of the hydraulic shaft sleeve 54 is fixedly connected with the rear cover plate 13, and the outside of the rear cover plate 13 is provided with a wiring cover 14.
The hydraulic shaft sleeve 54 is internally provided with a plurality of passages, the rotary mandrel 21 is correspondingly provided with a plurality of passages, a through hole for communicating the hydraulic shaft sleeve 54 with the passages of the rotary mandrel 21 is arranged between every two adjacent rotary oil seals 55, so that a plurality of sealed rotary circuits are formed between the hydraulic shaft sleeve 54 and the rotary mandrel 21, the front ends of the rotary circuits are respectively led out through the output end of the rotary mandrel 21, the rear ends of the rotary circuits are respectively led out through the through hole on the rear cover plate 13, and the rotary circuits are particularly connected to a hydraulic or pneumatic control component of a machining center through the through hole on the rear cover plate 13.
A brake device for brake control of the rotary spindle 21;
the brake device comprises a pneumatic clamp 41 and a brake ring 42, wherein the pneumatic clamp 41 is arranged on a base body 12, and the brake ring 42 is arranged on a pin shaft for connecting a rotary mandrel 21 and a fixed ring 31 and is used for brake control; the pneumatic clamp 41 is internally provided with a corresponding elastic structure, under the action of elastic force, the pneumatic clamp 41 and the brake ring 42 are in a tensioning state to brake the transmission device, when external compressed air is introduced into a closed cavity of the pneumatic clamp 41, the pneumatic clamp 41 deforms, the brake ring 42 is separated, and the transmission device can freely rotate.
The feedback device is used for feeding back the position and the speed of the torque motor rotor;
the device comprises an annular grating ruler 51 arranged on a moving part of the turntable bearing 22 and a reading head 52 arranged on a fixed part of the turntable bearing 22, and is used for detecting the rotating speed and the position of a rotary spindle; when the bearing rotates, the current position and the speed are accurately measured by the reading head 52 and fed back to the torque motor driving module; the circular grating is adopted to replace a circular grating, so that the problem of limitation of the installation position of the circular grating is solved.
The structural design of the embodiment meets the requirements of a machining center on high-speed and high-precision positioning of the A shaft, and simultaneously meets the requirements of the machining center on a hydraulic pneumatic control loop for automatically clamping parts.
Example two:
the present embodiment is further designed in that multiple channels for hydraulic oil or high-pressure gas to pass through are designed inside the rotating mandrel and distributed on the same cylindrical surface in a rotating manner. As shown in fig. 3, the hydraulic bushing 54 has a plurality of circular arc-shaped annular cavities connected to the through holes between the rotary oil seals 54. An annular closed space is formed between the hydraulic shaft sleeve 54 and the rotary mandrel 21, corresponding through holes are reserved in the hydraulic shaft sleeve 54 and the rotary mandrel 21 and connected with the closed space, the front end of each rotary loop is led out through the output end of the rotary mandrel 21, and the rear end of each rotary loop is connected to a hydraulic or pneumatic control component of the machining center through the through hole in the rear cover plate 13.
In this example, the number of the rotary circuits is 11, and the rotary circuits are respectively used for providing hydraulic, pneumatic and cooling liquid control circuits for an automatic clamp or a C shaft connected with the rotary mandrel 21, 6 of the rotary circuits are oil circuits, 2 of the rotary circuits are water circuits, and 1 of the rotary circuits is a steam circuit. The oil circuit is used for providing the lubrication, and the water route is used for carrying the cooling water, and the gas circuit is used for the gas tightness to detect, can satisfy the multiple requirement of lathe control.
The power device is divided into a torque motor stator 33 and a torque motor rotor 32, the torque motor stator 33 is fixed on the base body 12, the torque motor rotor 32 is fixed on the fixing ring 31 through screws, the fixing ring 31 is connected with the rotary spindle 21 through bolts, and when the torque motor rotor 32 rotates, the rotary spindle 21 is indirectly driven to rotate.
The front end of the seat body is provided with a front cover plate 21, the rear end is provided with a rear cover plate 13, and the rear end surface of the hydraulic shaft sleeve 54 is fixedly connected with the rear cover plate 13; the rear ends of the rotary circuits are led out through holes in the rear cover plate 13, and as shown in fig. 4, the rear ends of the hydraulic bushings 54 are fixed to the rear cover plate 13 by screws. And is connected to the hydraulic or pneumatic control components of the machining center via through holes in the interior of the back cover plate 13. The rotary spindle 21 is a shoulder shaft, the power device is arranged on the shoulder part, the hydraulic shaft sleeve 53 is arranged on the rear part of the rotary spindle, and the assembled torque motor rotor 32 is sleeved outside the hydraulic shaft sleeve 53 with a space left between the hydraulic shaft sleeve 53 and the hydraulic shaft sleeve, so that the torque motor rotor and the rotary shaft can smoothly rotate.
As shown in fig. 5, the utility model discloses a shaft drive 1 is connected with the transmission of C axle cradle pedestal 2, drives C axle cradle pedestal and realizes 360 degrees rotations, and this shaft drive's 11 rotary circuit can C axle cradle pedestal provide the control circuit of automatic clamp, hydraulic pressure, pneumatics, coolant liquid, reduce the interference problem of outside stringing, satisfy the control requirement of lathe.
Claims (8)
1. A-axis driving device for a numerical control machine tool is characterized by comprising a rotary mandrel (21), a power device, a transmission device and a rotary circuit, wherein
The power device comprises a torque motor rotor (32) and a torque motor stator (33), the torque motor stator (33) is arranged on the base body (12), and the torque motor rotor (32) drives a transmission device connected with the torque motor rotor to rotate;
the transmission device comprises a fixing ring (31) and a turntable bearing (22), a rotary mandrel (21) is connected with a torque motor rotor (32) through the fixing ring (31), the rotary mandrel (21) is assembled with the fixing ring (31) through a pin shaft, the turntable bearing (22) is installed on a base body and sleeved on the pin shaft, the transmission device connects the rotary mandrel (21) and the torque motor rotor (32) into a whole through the fixing ring (31), and 360-degree rotation of the rotary mandrel (21) is achieved;
the rotary circuit comprises a hydraulic shaft sleeve (54), the hydraulic shaft sleeve (54) is sleeved at the rear part of the rotary mandrel (21), a plurality of rotary oil seals (55) are arranged on the matching surface of the hydraulic shaft sleeve (54) and the rotary mandrel (21), and two ends of the matching surface of the hydraulic shaft sleeve (54) and the rotary mandrel (21) are connected by adopting bearings; the two ends of the seat body are provided with a front cover plate and a rear cover plate, and the rear end surface of the hydraulic shaft sleeve (54) is fixedly connected with the rear cover plate; a plurality of passages are arranged in the hydraulic shaft sleeve (54), a plurality of passages are correspondingly arranged in the rotary mandrel (21), a through hole for communicating the hydraulic shaft sleeve (54) with the passages of the rotary mandrel (21) is arranged between every two adjacent rotary oil seals (55), a plurality of sealed rotary circuits are formed between the hydraulic shaft sleeve (54) and the rotary mandrel (21), the front ends of the rotary circuits are respectively led out through the output end of the rotary mandrel (21), and the rear ends of the rotary circuits are respectively led out through the through hole in the rear cover plate (13).
2. The a-axis drive apparatus for a numerically controlled machine tool according to claim 1, characterized in that the rear end of each rotary circuit is connected to a hydraulic or pneumatic control part of the machining center via a through hole in the back cover plate (13).
3. The a-axis drive device for numerically controlled machine tools according to claim 1, characterized in that said rotating circuits are designed with 11 in total, providing hydraulic and/or pneumatic and/or coolant control circuits for the automatic clamps or C-axis respectively, connected to the revolving spindle (21).
4. The a-axis driving apparatus for the numerical control machine according to claim 1, 2 or 3, wherein the braking device comprises a pneumatic clamp (41) and a braking ring (42), the pneumatic clamp (41) is installed on the base body (12), and the braking ring (42) is installed on a pin shaft connecting the rotating mandrel (21) and the fixed ring (31) for braking control.
5. The a-axis driving apparatus for the numerical control machine according to claim 4, wherein the pneumatic clamp (41) is internally provided with a corresponding elastic structure.
6. The a-axis driving apparatus for numerical control machine tool according to claim 4, wherein the feedback means comprises a ring-shaped grating scale (51) installed on the moving part of the turntable bearing (22) and a reading head (52) installed on the fixed part of the turntable bearing (22) for detecting the rotation speed and position of the revolving spindle; when the bearing rotates, the current position and the current speed are accurately measured through the reading head (52) and fed back to the torque motor driving module.
7. The a-axis driving apparatus for the numerical control machine tool according to claim 1, wherein the bearings of the mating surfaces of the hydraulic bushing (54) and the revolving spindle (21) employ deep groove ball bearings.
8. The a-axis driving apparatus for numerical control machine tool according to claim 1, wherein the rotary spindle (21) is a shoulder shaft, the power unit is installed at the shoulder portion, a hydraulic bushing (54) is installed at the rear portion of the rotary spindle, and the torque motor rotor (32) is fitted outside the hydraulic bushing (54) with a space therebetween after assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223282154.3U CN218836943U (en) | 2022-12-08 | 2022-12-08 | A axle drive arrangement for digit control machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223282154.3U CN218836943U (en) | 2022-12-08 | 2022-12-08 | A axle drive arrangement for digit control machine tool |
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| Publication Number | Publication Date |
|---|---|
| CN218836943U true CN218836943U (en) | 2023-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223282154.3U Active CN218836943U (en) | 2022-12-08 | 2022-12-08 | A axle drive arrangement for digit control machine tool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116690241A (en) * | 2023-08-07 | 2023-09-05 | 通用技术集团机床工程研究院有限公司 | High-precision turning and milling composite rotary table |
-
2022
- 2022-12-08 CN CN202223282154.3U patent/CN218836943U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116690241A (en) * | 2023-08-07 | 2023-09-05 | 通用技术集团机床工程研究院有限公司 | High-precision turning and milling composite rotary table |
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