CN217935224U - Numerical control built-in motor arbitrarily indexing turntable - Google Patents
Numerical control built-in motor arbitrarily indexing turntable Download PDFInfo
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- CN217935224U CN217935224U CN202221897591.3U CN202221897591U CN217935224U CN 217935224 U CN217935224 U CN 217935224U CN 202221897591 U CN202221897591 U CN 202221897591U CN 217935224 U CN217935224 U CN 217935224U
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Abstract
The utility model provides an arbitrary graduation revolving stage of numerical control internal motor, including base and mesa, link to each other through slewing bearing between base and the mesa, be equipped with the circular shape hole in the base, the hole internal fixation is equipped with the stator, the fixed rotor that is equipped with stator matched with in mesa below, be equipped with circular shape expansion brake in the hole, establish hydraulic pressure oil pocket in the expansion brake, form elasticity brake thin slice between the upper surface of hydraulic pressure oil pocket and expansion brake, the lower terminal surface clearance fit of elasticity brake thin slice and rotor, hydraulic pressure oil pocket passes through the oil circuit and links to each other with the hydraulic oil source. The beneficial effects of the utility model are that owing to adopt above-mentioned technical scheme, make revolving stage accurate positioning, simple structure, the brake force is strong, even large-scale revolving stage, also can provide sufficient brake force, the utility model discloses a mode that forced air cooling and water-cooling combine cools off the motor, can effectively solve and directly drive the radiating problem of revolving stage motor.
Description
Technical Field
The utility model relates to a revolving stage technical field, specificly a numerical control built-in motor arbitrary graduation revolving stage.
Background
A turntable, also known as a rotary table, is a machine tool accessory with a rotatable table top for clamping workpieces to achieve rotation and indexing positioning. The rotary table comprises a table top and a base, the table top and the base are connected through a slewing bearing, and the rotary table is further provided with a driving device for driving the table top to rotate relative to the base.
The driving device in the prior art generally drives the table top to rotate by a motor through worm and gear transmission, and has the problems of higher complexity, poor transmission precision and low rotating speed of a turntable structure due to a transmission structure. In order to solve the problems, part of the rotary table is set to be a direct-drive rotary table, namely, the direct-current motor is used for directly driving the table top, the stator of the direct-current motor is fixed with the base, and the rotor of the direct-current motor is connected with the table top. However, in order to improve the rotation precision of the direct-drive turntable, the direct-drive turntable needs to have good brake performance, especially when being applied to a large turntable.
The part directly drives the revolving stage and adopts the mode of electromagnetic braking, and its drawback lies in that braking force is little, and electromagnetic brake is bulky, the maintenance of being inconvenient. In some large direct-drive rotary tables, a plurality of groups of brake pads are arranged between the table top and the base, and the brake pads are driven to move by a cylinder or an oil cylinder so as to brake relative rotation between the table top and the base. However, the cooperation of a plurality of brake pads puts higher requirements on installation accuracy and operation accuracy, and the braking effect of the brake pads needs to be further improved.
In addition, in the direct-drive turntable, because the direct-current motor is directly arranged inside the turntable, the heat dissipation of the stator is also a problem which needs to be considered and solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a numerical control built-in motor divides the revolving stage wantonly, has good brake braking performance, and the rotation precision is high, and the radiating effect of stator is good, especially is fit for the big-and-middle-sized work piece of clamping.
The technical scheme of the utility model is that:
the utility model provides a numerical control built-in motor divides revolving stage wantonly, includes base and mesa, link to each other through slewing bearing between base and the mesa, be equipped with the circular shape hole in the base, the upper portion of hole is fixed and is equipped with the stator, the fixed rotor that is equipped with stator matched with below the mesa, its characterized in that: the lower part of hole is equipped with circular shape expansion brake, expansion brake links to each other with the base is fixed, be equipped with annular oil groove on expansion brake's the outer peripheral face, the periphery of oil groove is equipped with O type sealing washer, and O type sealing washer and oil groove form inclosed hydraulic pressure oil pocket, form elastic braking thin slice between hydraulic pressure oil pocket and the upper surface of expansion brake, elastic braking thin slice and the lower terminal surface clearance fit of rotor, hydraulic pressure oil pocket passes through the oil circuit and links to each other with the hydraulic pressure oil source.
Through the slewing bearing, the table top and the base can rotate in the circumferential direction and are positioned in the axial direction.
The expansion brake is coaxially arranged in the inner hole of the base, and a small gap is formed between the upper surface of the expansion brake and the lower end surface of the motor rotor.
Preferably, a brake disc is fixedly arranged on the lower end face of the rotor, and the elastic brake sheet is in clearance fit with the brake disc.
When the hydraulic oil cavity is filled with hydraulic oil, the hydraulic oil cavity expands, the elastic braking sheet of the hydraulic oil cavity deforms and slightly bulges towards the brake disc, the bulging amplitude is smaller, and the elastic braking sheet contacts with the lower surface of the brake disc after bulging.
After the hydraulic oil cavity is filled with oil and expanded, the friction between the elastic braking sheet and the brake disc generates braking force, so that the table top brakes, after the hydraulic oil cavity is decompressed, the elastic braking sheet resets, the elastic braking sheet and the brake disc return to a clearance state, and the elastic braking sheet and the brake disc can freely and relatively rotate.
The numerical control built-in motor arbitrary indexing turntable comprises a liquid cooling device for cooling the stator.
Through setting up the liquid cooling device, can effectively solve the heat dissipation problem that directly drives the revolving stage stator.
In particular, the method comprises the following steps of,
the liquid cooling device comprises a cooling liquid tank arranged on the circumferential surface of the stator, the circumferential surface of the stator is connected with the inner hole of the base in a sealing mode to enable the cooling liquid tank to form a closed cooling liquid cavity, and the cooling liquid cavity is connected with a cooling liquid source through a cooling liquid channel.
Preferably, the cooling fluid bath is annular. The stator is fixed continuous with the base, is equipped with the coolant liquid passageway of intercommunication coolant liquid chamber and base surface in the base, and the coolant liquid passageway communicates to the coolant liquid chamber, and the coolant liquid passageway includes inlet channel and liquid outlet channel, and the coolant liquid gets into the coolant liquid chamber by inlet channel, absorbs the stator heat after encircleing the global a week of stator, flows from liquid outlet channel again, and then plays the cooling action to the stator.
Further, in the above-mentioned case,
a motor casing is fixedly arranged in the inner hole of the base, and the peripheral surface of the stator is connected with the inner surface of the motor casing in a sealing mode to form a closed cooling liquid cavity.
In order to facilitate the installation, in the hole, set up the motor cover shell in the fixed position department of stator, the motor cover shell links to each other with the hole is fixed, the medial surface laminating of the lateral surface of motor cover shell and base hole, the medial surface of the global and motor cover shell of stator is sealed continuous, and the coolant liquid chamber is the airtight cavity that coolant liquid groove and motor cover shell's medial surface formed. And sealing rings are arranged between the upper part and the lower part of the circumferential surface of the stator and the motor casing shell, so that the cooling liquid is prevented from flowing out through the gap between the circumferential surface of the stator and the motor casing shell.
The cooling liquid channel is a liquid channel which is arranged in the base and penetrates through the base and the motor casing.
Except utilizing the coolant liquid to cool down the motor, the utility model discloses still cool down stator and rotor through air-cooled mode.
The stator and rotor of the motor rotate relatively, and an annular gap exists between the stator and the rotor. The cooling air blows in the gap through the air inlet channel, the heat dissipation function can be achieved for the gap between the stator and the rotor, meanwhile, positive pressure is generated in the rotary table by the cooling air, and dust and foreign matters are prevented from entering the rotary table.
In particular, the method comprises the following steps of,
the stator lower part links to each other with the base is fixed, be equipped with first clearance between stator upper portion and the base hole, be equipped with the second clearance between stator up end and the mesa, be equipped with the third clearance between stator and the rotor, be equipped with the fourth clearance under the stator between terminal surface and the expansion brake ware, be equipped with air inlet channel and the air-out passageway of intercommunication base surface and hole in the base, air inlet channel, first clearance, second clearance, third clearance, fourth clearance and air-out passageway communicate in proper order.
The brake disc is ring shape, and the hole of brake disc is equipped with location socket, be equipped with the location arch on the lower terminal surface of rotor, location arch and location socket are pegged graft. After the insertion, the brake disc is connected with the rotor through bolts.
The periphery of the upper groove surface of the oil groove is provided with a circular ring-shaped upper O-shaped sealing ring groove, the periphery of the lower groove surface of the oil groove is provided with a lower O-shaped sealing ring groove corresponding to the upper O-shaped sealing ring groove, and the O-shaped sealing rings are respectively abutted and sealed with the upper O-shaped sealing ring groove and the lower O-shaped sealing ring groove.
The O-shaped ring is embedded between the upper O-shaped sealing ring groove and the lower O-shaped sealing ring groove and is extruded by the inner wall of the upper O-shaped sealing ring groove and the lower O-shaped sealing ring groove, so that the oil groove is stably sealed. The outer edge of the O-shaped sealing ring protrudes out of the outer peripheral surface of the expansion brake, the O-shaped sealing ring is abutted against the inner peripheral surface of the inner hole, and the inner peripheral surface of the inner hole extrudes the O-shaped sealing ring inwards. After the hydraulic oil cavity is expanded, the gap of the oil groove is enlarged, but the O-shaped sealing ring is decompressed and expanded, the inner periphery of the inner hole extrudes the O-shaped sealing ring inwards, so that the deformation quantity of the O-shaped sealing ring is mainly concentrated in the oil groove, and the sealing effect of the O-shaped sealing ring on the hydraulic oil cavity is kept.
And the middle part of the upper surface of the expansion brake is fixedly provided with an encoder, and the encoder is connected with the controller.
The utility model has the advantages and positive effects that: owing to adopt above-mentioned technical scheme, can effectually brake the mesa, make revolving stage accurate positioning, expansion brake, simple structure, the braking force is strong, even large-scale revolving stage, also can provide sufficient braking force, the utility model discloses a mode that forced air cooling and water-cooling combine cools off the motor, can effectively solve and directly drive the radiating problem of revolving stage motor.
Drawings
FIG. 1 is an explosion diagram of the present invention
FIG. 2 is a schematic front view of the present invention
FIG. 3 isbase:Sub>A cross-sectional view taken at A-A in FIG. 2
FIG. 4 is a detail view at C of FIG. 3
FIG. 5 is a schematic view of an expansion brake
FIG. 6 is a cross-sectional view taken along line B-B in FIG. 5
FIG. 7 is a detail view at D of FIG. 6
FIG. 8 is a schematic view of the structure of the air inlet and outlet channels
In the figure:
1. table top 2, base 3 and slewing bearing
5. Expansion brake 6, brake disc 8 and encoder
21. Inner bore 41, rotor 42, stator
43. Motor shell 51, oil groove 52, O type sealing washer
53. Elastic brake sheet 61, positioning socket 71 and first gap
72. Second gap 73, third gap 74, fourth gap
75. Air inlet channel 76, air outlet channel 411 and positioning protrusion
421. A cooling liquid tank 511, an upper O-shaped sealing ring tank 512 and a lower O-shaped sealing ring tank
Detailed Description
As shown in fig. 1-8, the utility model discloses:
the numerical control built-in motor arbitrary indexing turntable comprises a base 2 and a table top 1, wherein the base 2 is connected with the table top 1 through a slewing bearing 3, a circular inner hole is formed in the base 2, a stator 42 is fixedly arranged on the upper portion of the inner hole, a rotor 41 matched with the stator 42 is fixedly arranged below the table top 1, a circular expansion brake 5 is arranged on the lower portion of the inner hole, the expansion brake 5 is fixedly connected with the base 2, an annular oil groove 51 is formed in the outer peripheral surface of the expansion brake 5, an O-shaped sealing ring 52 is arranged on the outer periphery of the oil groove 51, a closed hydraulic oil cavity is formed by the O-shaped sealing ring 52 and the oil groove 51, an elastic braking sheet 53 is formed between the hydraulic oil cavity and the upper surface of the expansion brake 5, the elastic braking sheet 53 is in clearance fit with the lower end surface of the rotor 51, and the hydraulic oil cavity is connected with a hydraulic oil source through an oil path.
Through the slewing bearing 3, the table top 1 and the base 2 can rotate circumferentially and are positioned axially.
The expansion brake 5 is coaxially disposed in the inner hole of the base 2, and a small gap is provided between the upper surface of the expansion brake 5 and the lower end surface of the motor rotor 41.
Preferably, a brake disc 6 is fixedly arranged on the lower end surface of the rotor 41, and the elastic brake sheet 53 is in clearance fit with the brake disc 6.
When the hydraulic oil chamber is filled with hydraulic oil, the hydraulic oil chamber expands, the elastic brake sheet 53 in the hydraulic oil chamber deforms and slightly bulges towards the brake disc 6, the bulging amplitude is small, and the elastic brake sheet 53 is in contact with the lower surface of the brake disc 6 after bulging.
After the oil in the hydraulic oil cavity is filled and expanded, the elastic braking sheet 53 and the brake disc generate braking force through friction, so that the table board 1 brakes, after the pressure in the hydraulic oil cavity is released, the elastic braking sheet resets, the elastic braking sheet and the brake disc return to a clearance state, and the elastic braking sheet and the brake disc can freely rotate relatively.
The numerical control built-in motor arbitrary indexing rotary table comprises a liquid cooling device for cooling the stator.
Through setting up the liquid cooling device, can effectively solve the heat dissipation problem that directly drives the revolving stage stator.
In particular, the method comprises the following steps of,
the liquid cooling device is including setting up the cooling fluid groove 421 on stator 42 is global, base hole internal fixation is equipped with motor cover 43, and motor cover 43 links to each other with base hole internal fixation, and stator 42 global links to each other with motor cover 43's internal surface sealing makes the cooling bath form inclosed cooling fluid chamber, the cooling fluid chamber passes through the cooling fluid passageway and links to each other with the cooling fluid source.
Preferably, the cooling fluid bath 421 is annular. The stator is fixed continuous with the base, is equipped with the coolant liquid passageway of intercommunication coolant liquid chamber and base surface in the base, and the coolant liquid passageway communicates to the coolant liquid chamber, and the coolant liquid passageway includes inlet channel and liquid outlet channel, and the coolant liquid gets into the coolant liquid chamber by this night's passageway, absorbs the stator heat after encircleing the global a week of stator, flows from liquid outlet channel again, and then plays the cooling effect to the stator.
And sealing rings are arranged between the upper part and the lower part of the circumferential surface of the stator and the motor casing shell, so that the cooling liquid is prevented from flowing out through the gap between the circumferential surface of the stator and the motor casing shell.
Except that utilizing the coolant liquid to cool down the motor, the utility model discloses still cool down stator 42 and rotor 41 through the air-cooled mode.
The stator 42 and the rotor 41 of the motor rotate relative to each other with an annular gap therebetween. Cooling air is blown into the gap through the air inlet channel, and the heat dissipation function can be achieved for the gap between the stator and the rotor.
In particular, the method comprises the following steps of,
the lower portion of the stator 42 is fixedly connected with the base 2, a first gap 71 is arranged between the upper portion of the stator and an inner hole of the base, a second gap 72 is arranged between the upper end face of the stator and the table top, a third gap 73 is arranged between the stator and the rotor, a fourth gap 74 is arranged between the lower end face of the stator and the expansion brake, an air inlet channel 75 and an air outlet channel 76 which are communicated with the outer surface and the inner hole of the base are arranged in the base, and the air inlet channel 75, the first gap 71, the second gap 72, the third gap 74, the fourth gap 74 and the air outlet channel 76 are communicated in sequence.
The brake disc 6 is ring shape, and the hole of brake disc is equipped with location socket 61, be equipped with location arch 411 on the lower terminal surface of rotor, location arch and location socket peg graft. After the insertion, the brake disc is connected with the rotor through bolts.
The periphery of the upper groove surface of the oil groove is provided with a circular ring-shaped upper O-shaped sealing ring groove 511, the periphery of the lower groove surface of the oil groove is provided with a lower O-shaped sealing ring groove 512 corresponding to the upper O-shaped sealing ring groove, and the O-shaped sealing ring 52 is respectively abutted and sealed with the upper O-shaped sealing ring groove and the lower O-shaped sealing ring groove.
The O-shaped ring is embedded between the upper O-shaped sealing ring groove and the lower O-shaped sealing ring groove and is extruded by the inner wall of the upper O-shaped sealing ring groove and the lower O-shaped sealing ring groove, so that the oil groove is stably sealed. The outer edge of the O-shaped sealing ring protrudes out of the outer peripheral surface of the expansion brake, the O-shaped sealing ring is abutted against the inner peripheral surface of the inner hole, and the inner peripheral surface of the inner hole extrudes the O-shaped sealing ring inwards. After the hydraulic oil cavity is expanded, the gap of the oil groove is enlarged, but the O-shaped sealing ring is decompressed and expanded, the inner periphery of the inner hole extrudes the O-shaped sealing ring inwards, so that the deformation quantity of the O-shaped sealing ring is mainly concentrated in the oil groove, and the sealing effect of the O-shaped sealing ring on the hydraulic oil cavity is kept.
And an encoder 8 is fixedly arranged in the middle of the upper surface of the expansion brake.
The working process of the example is as follows:
the rotor and the stator drive the table board 1 to rotate relative to the base 2, when braking is needed, hydraulic oil is injected into a hydraulic oil cavity through an oil path, the hydraulic oil cavity expands, the elastic braking sheet 53 bulges towards the direction of the brake disc, the elastic braking sheet is contacted with the lower surface of the brake disc 6 after bulging, braking force is generated through friction between the outer side of the elastic braking sheet and the brake disc, and the table board 1 brakes.
After the hydraulic oil cavity is decompressed, the elastic brake sheet is reset, the elastic brake sheet and the brake disc 6 return to a clearance state, and the elastic brake sheet and the brake disc can freely rotate relatively.
When the rotary table works, external cooling liquid enters the cooling liquid cavity through the cooling liquid channel, flows out after absorbing heat, and can effectively play a role in cooling the stator. Meanwhile, the air inlet channel blows in cooling air to flow through a gap between the stator and the rotor, and then blows out the cooling air to cool the stator and the rotor, so that positive pressure inside the rotary table is guaranteed, and dust and foreign matters are reduced to enter the rotary table.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.
Claims (9)
1. The utility model provides a numerical control built-in motor divides revolving stage wantonly, includes base and mesa, link to each other through slewing bearing between base and the mesa, be equipped with the circular shape hole in the base, the upper portion of hole is fixed and is equipped with the stator, the fixed rotor that is equipped with stator matched with below the mesa, its characterized in that: the lower part of hole is equipped with circular shape expansion brake, expansion brake links to each other with the base is fixed, be equipped with annular oil groove on expansion brake's the outer peripheral face, the periphery of oil groove is equipped with O type sealing washer, and O type sealing washer and oil groove form inclosed hydraulic pressure oil pocket, form elastic braking thin slice between hydraulic pressure oil pocket and the upper surface of expansion brake, elastic braking thin slice and the lower terminal surface clearance fit of rotor, hydraulic pressure oil pocket passes through the oil circuit and links to each other with the hydraulic pressure oil source.
2. The numerical control built-in motor arbitrarily indexing table according to claim 1, wherein: and a brake disc is fixedly arranged on the lower end surface of the rotor, and the elastic brake sheet is in clearance fit with the brake disc.
3. The numerically controlled internal motor arbitrarily-indexed rotary table according to any one of claims 1 or 2, wherein: the numerical control built-in motor arbitrary indexing rotary table comprises a liquid cooling device for cooling the stator.
4. The numerical control built-in motor arbitrarily indexing table according to claim 3, wherein: the liquid cooling device comprises a cooling liquid tank arranged on the circumferential surface of the stator, the circumferential surface of the stator is connected with the inner hole of the base in a sealing mode to enable the cooling liquid tank to form a closed cooling liquid cavity, and the cooling liquid cavity is connected with a cooling liquid source through a cooling liquid channel.
5. The numerically controlled internal motor arbitrarily indexed rotary table according to claim 4, wherein: a motor casing is fixedly arranged in the inner hole of the base, and the peripheral surface of the stator is connected with the inner surface of the motor casing in a sealing manner to form a closed cooling liquid cavity.
6. The numerical control built-in motor arbitrary indexing table according to any one of claims 1, 2, 4 or 5, wherein: the stator lower part links to each other with the base is fixed, be equipped with first clearance between stator upper portion and the base hole, be equipped with the second clearance between stator up end and the mesa, be equipped with the third clearance between stator and the rotor, be equipped with the fourth clearance under the stator between terminal surface and the expansion brake ware, be equipped with air inlet channel and the air-out passageway of intercommunication base surface and hole in the base, air inlet channel, first clearance, second clearance, third clearance, fourth clearance and air-out passageway communicate in proper order.
7. The numerical control built-in motor arbitrarily indexing table according to claim 2, wherein: the brake disc is ring shape, and the hole of brake disc is equipped with location socket, be equipped with the location arch on the lower terminal surface of rotor, location arch and location socket are pegged graft.
8. The numerical control built-in motor arbitrarily-indexed rotary table according to claim 6, wherein: the periphery of the upper groove surface of the oil groove is provided with a circular ring-shaped upper O-shaped sealing ring groove, the periphery of the lower groove surface of the oil groove is provided with a lower O-shaped sealing ring groove corresponding to the upper O-shaped sealing ring groove, and the O-shaped sealing rings are respectively abutted and sealed with the upper O-shaped sealing ring groove and the lower O-shaped sealing ring groove.
9. The numerical control built-in motor arbitrarily indexing table according to claim 8, wherein: and an encoder is fixedly arranged in the middle of the upper surface of the expansion brake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221897591.3U CN217935224U (en) | 2022-07-22 | 2022-07-22 | Numerical control built-in motor arbitrarily indexing turntable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221897591.3U CN217935224U (en) | 2022-07-22 | 2022-07-22 | Numerical control built-in motor arbitrarily indexing turntable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217935224U true CN217935224U (en) | 2022-11-29 |
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ID=84190329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221897591.3U Active CN217935224U (en) | 2022-07-22 | 2022-07-22 | Numerical control built-in motor arbitrarily indexing turntable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217935224U (en) |
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2022
- 2022-07-22 CN CN202221897591.3U patent/CN217935224U/en active Active
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