CN220838931U - Numerical control turntable with gravity balance function - Google Patents
Numerical control turntable with gravity balance function Download PDFInfo
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- CN220838931U CN220838931U CN202322297769.1U CN202322297769U CN220838931U CN 220838931 U CN220838931 U CN 220838931U CN 202322297769 U CN202322297769 U CN 202322297769U CN 220838931 U CN220838931 U CN 220838931U
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- 230000007246 mechanism Effects 0.000 description 4
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The numerical control turntable with the gravity balance function comprises a support, a tray and a motor, wherein the tray and the motor are arranged on the support, and the motor is used for driving the tray to rotate on the support; the device also comprises a rotating shaft core, a left balance wheel, a right balance wheel and a driving assembly; one end of the rotating shaft core is relatively fixed with the tray, and the other end of the rotating shaft core is fixedly connected with the driving assembly; the left balance wheels and the right balance wheels are equal in number and are both rotatably connected to the rotating shaft core; the driving assembly is used for driving the left balance wheel and the right balance wheel to synchronously and reversely rotate and is in limit fit with the left balance wheel and the right balance wheel under the working condition of the numerical control turntable. Compared with the prior art, the numerical control turntable disclosed by the utility model can balance the torque generated by the tray with workpieces of different masses.
Description
Technical Field
The utility model relates to the technical field of numerical control turntables, in particular to a numerical control turntable with a gravity balance function.
Background
For workpieces with high processing requirements, the three-axis machine tool cannot meet the processing requirements, so that a new numerical control machine tool can be designed into four-axis or more. The fourth axis and the fifth axis of the general machine tool are rotation axes, and specifically may be a rotation spindle or a rotation workpiece. In the case of rotating workpieces, a numerically controlled turntable for holding the workpiece is required.
If the numerical control turntable is in a horizontal state (as in the state of fig. 1), the load of a motor connected with the numerical control turntable is minimum. In the processing process, the numerical control turntable rotates, and different torques (the torque generated by the numerical control turntable is maximum when the numerical control turntable rotates to a vertical state) are generated when the numerical control turntable rotates to different angles due to the gravity of the workpiece, so that the motor connected with the numerical control turntable generates opposite torques to maintain the state, the load of the motor is greatly increased, the energy consumption is not only reduced, but also the effective power of the motor is reduced, and meanwhile, a large amount of heat is generated, so that the service performance is reduced.
For this purpose, publication No. CN105382624a provides a two-axis electric turntable mechanism with a double hydraulic cylinder counterweight and a method for compensating the overturning moment thereof, which reduces or reasonably compensates the influence of the overturning moment of the turntable (i.e., the above-mentioned numerical control turntable) by a mechanical balancing mechanism with the double hydraulic cylinder counterweight. Specifically, the mechanical balance mechanism comprises a balance cylinder I1 and a balance cylinder II2, wherein one end of the balance cylinder I1 and one end of the balance cylinder II2 are fixed below a rotating shaft A of a turntable of the U-shaped cradle 7 generating overturning moment through an end face ball bearing 3, when the U-shaped cradle 7 rotates around the rotating shaft A, the cylinder body of the balance cylinder I1 and the balance cylinder II2 rotate around a cylinder earring 4 along with the swinging of the turntable, and a hydraulic control system 6 adjusts the pressure of the balance cylinder I1 and the balance cylinder II2, so that the overturning moment of the turntable is compensated.
The compensation mode of the prior art is a dynamic compensation, and the hydraulic control system 6 is required to adjust the pressure of the balance cylinder I1 and the balance cylinder II2 according to the angle of the turntable. However, in high-speed reaction situations, synchronous control of the oil pressure system and the servo motor is basically not achieved, as in the prior high-efficiency machine tool, the balance cylinder I1 and the balance cylinder II2 can follow the rotating speed of the upper rotary table, and therefore the two mutually interfere. In addition, one end of the balance oil cylinder I1 and one end of the balance oil cylinder II2 are connected below the axis A of the rotating shaft of the turntable of the U-shaped cradle 7, when the torque output required by the oil cylinder is maximum, the oil cylinder stretches out the longest, the most oil is required to be obtained from a hydraulic system, the oil quantity of the energy storage cylinder is reduced, the oil pressure is led to be reduced, the strength of the oil cylinder is reduced, and the pressure is unstable during pressurization.
Disclosure of utility model
The utility model aims to overcome the defects in the prior art and provides a numerical control turntable with a gravity balance function.
In order to achieve the above purpose, the utility model discloses a numerical control turntable with a gravity balance function, which comprises a support, a tray and a motor, wherein the tray and the motor are arranged on the support;
The device also comprises a rotating shaft core, a left balance wheel, a right balance wheel and a driving assembly; one end of the rotating shaft core is relatively fixed with the tray, and the other end of the rotating shaft core is fixedly connected with the driving assembly; the left balance wheels and the right balance wheels are equal in number and are both rotatably connected to the rotating shaft core; the driving assembly is used for driving the left balance wheel and the right balance wheel to synchronously and reversely rotate and is in limit fit with the left balance wheel and the right balance wheel under the working condition of the numerical control turntable.
Preferably, the outlines of the left balance wheel and the right balance wheel are circular, a first transmission tooth is arranged on the outline of the left balance wheel, and a second transmission tooth is arranged on the outline of the right balance wheel;
the driving assembly comprises a left worm meshed with the first transmission gear, a right worm meshed with the second transmission gear and a driving device for driving the left worm and the right worm to rotate.
Further preferably, the output end of the driving device is connected with the left worm, a driving gear is arranged on the left worm, and a driven gear meshed with the driving gear is arranged on the right worm.
Further preferably, a left hammer body is arranged on the left balance wheel, and a right hammer body is arranged on the right balance wheel.
Further preferably, the left hammer body is arranged on the side surface of the left balance wheel, which is far away from the right balance wheel, and the right hammer body is arranged on the side surface of the right balance wheel, which is far away from the left balance wheel.
Further preferably, the left balance wheel is provided with a left hollowed-out part, and the right balance wheel is provided with a right hollowed-out part.
Further preferably, the left hollowed-out part and the left hammer body are arranged in a central symmetry manner, and the right hollowed-out part and the right hammer body are arranged in a central symmetry manner.
Preferably, the end part of the rotating shaft core, which is far away from the tray, is fixedly connected with a connecting rod, the end part of the connecting rod, which is far away from the rotating shaft core, is provided with a bracket, and the driving assembly is fixedly connected on the bracket.
Compared with the prior art, the utility model has the beneficial effects that: the numerical control turntable disclosed by the utility model has the advantages that the rotating shaft core fixedly connected with the tray is arranged, and the left balance wheel and the right balance wheel are arranged on the rotating shaft core, so that not only can the torque generated by the tray and a workpiece arranged on the tray in the processing process be balanced, but also the stability of the tray in the processing process is ensured, and in addition, no matter how fast the tray rotates in the processing process, the two balance weights can not influence the processing of the tray, so that the problem that the balance oil cylinder and the tray are interfered due to the fact that the tray (namely the turntable in the background technology) is balanced by the balance oil cylinder in the prior art is solved. In the process of balancing the torque, the two counterweights can be rotated according to the mass of different workpieces or the change of the mass of the workpiece in the processing process, so that the two counterweights are positioned at different angles and positions, and the torque generated by the workpieces with different masses is balanced. In addition, two counterweights with opposite movement directions are provided, which not only can balance the torque generated by the tray and the workpieces arranged on the tray, but also can balance the torque generated by the counterweights at special positions.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a two-axis electric turntable mechanism with double hydraulic cylinder weights in prior art CN 105382624A;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is a schematic perspective view of the numerical control turntable with gravity balance function in a horizontal state;
FIG. 4 is a left side view of the numerical control dial of FIG. 3;
FIG. 5 is a schematic perspective view of the numerical control turntable with gravity balance function rotated by 45 degrees;
FIG. 6 is a left side view of the numerical control dial of FIG. 5;
fig. 7 is a schematic perspective view of the numerical control turntable with gravity balance function in a vertical state;
FIG. 8 is a left side view of the numerical control dial of FIG. 7;
FIG. 9 is a left side view of the numerical control turntable with only one balance wheel in a special position;
FIG. 10 is a left side view of the numerical control dial with two balance wheels in a particular position;
A support 1;
A tray 2;
a rotation shaft core 3; a link 31; a bracket 32;
A left balance wheel 4; a first gear 41; a left hammer 42; a left hollowed-out portion 43;
a right balance wheel 5; a second gear 51; a right hammer 52; a right hollowed-out portion 53;
A drive assembly 6; a left worm 61; a driving gear 611; a right worm 62; a driven gear 621; and a driving device 63.
Detailed Description
In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and include, for example, either fixedly attached, detachably attached, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Example 1
The technical scheme of the utility model is further described below with reference to fig. 3-10.
A numerical control turntable with a gravity balance function, see fig. 3-8, comprises a support 1, a tray 2, a motor (not shown in the figure), a rotating shaft core 3, a left balance wheel 4, a right balance wheel 5 and a driving assembly 6. The tray 2 is rotatably connected to the support 1, and the motor drives the tray 2 to rotate on the support 1 under the working condition or when the position of the weight is adjusted. One end of the rotating shaft core 3 is fixedly connected with the tray 2, and the other end of the rotating shaft core 3 is fixedly connected with the driving component 6, so that the driving component 6 is supported. The number of the left balance wheel 4 and the right balance wheel 5 is equal, and in this embodiment, one of the left balance wheel 4 and the right balance wheel 5 is identical to the two balance weights in structural shape, and both of them are rotatably connected to the rotation shaft core 3. When the positions of the heavy weights need to be adjusted, the main shaft stops processing the workpiece on the numerical control turntable, and the driving assembly 6 drives the left balance wheel 4 and the right balance wheel 5 to synchronously and reversely rotate, so that the two heavy weights and the numerical control turntable are in a balanced state; when the numerical control turntable is under the working condition, the driving assembly 6 is in limit fit with the left balance wheel 4 and the right balance wheel 5, so that the left balance wheel 4, the right balance wheel 5 and the tray 2 synchronously rotate, and the tray 2 can be guaranteed to be in a balanced state under any state.
The numerical control turntable is fixedly connected with the tray 2 through the rotating shaft core 3, and the left balance wheel 4 and the right balance wheel 5 are arranged on the rotating shaft core 3, so that not only can the tray 2 be balanced and the torque generated in the processing process of workpieces arranged on the tray 2 be ensured, but also the stability of the tray 2 in the processing process is ensured, and in addition, no matter how fast the rotating speed of the tray 2 in the processing process is, the two balance weights can not influence the processing of the tray 2, so that the problem that the balance cylinder and the tray 2 are interfered due to the balance cylinder (namely the turntable in the background technology) in the prior art is solved. In the process of balancing the torque, the two counterweights can be rotated according to the mass of different workpieces or the change of the mass of the workpiece in the processing process, so that the two counterweights are positioned at different angles and positions, and the torque generated by the workpieces with different masses is balanced. Furthermore, the provision of two counterweights with opposite directions of movement not only balances the torque generated by the pallet 2 and the workpieces provided on the pallet 2, but also balances the torque generated by the counterweights themselves in specific positions. As an example, in fig. 9, the tray 2 is positioned on the left side and in a vertical state, and the counter weight is provided only one, and at this time, a center angle of 45 ° exists between the center of mass of the counter weight, the horizontal line, and the rotation shaft core 3, in which state the tray 2 and the center of mass reach an equilibrium state; if the tray 2 rotates to a horizontal state, a central angle of 45 ° exists between the center of mass of the counter weight, the vertical line and the rotation shaft core 3, the counter weight generates a torque, and thus the equilibrium state cannot be reached. Referring to fig. 10, there are provided two counterweights which can be symmetrical about a vertical line when the tray 2 is rotated to a horizontal state, thereby achieving a balanced state, that is, the two counterweights can be brought into a balanced state with the tray 2 regardless of the position to which the tray 2 is rotated.
In this embodiment, referring to fig. 3 to 8, a connecting rod 31 is fixedly connected to the end of the rotating shaft core 3 far from the tray 2, and a bracket 32 is provided at the end of the connecting rod 31 far from the rotating shaft core 3. The profiles of the left balance wheel 4 and the right balance wheel 5 are circular, the profile of the left balance wheel 4 is provided with a first transmission gear 41, and the profile of the right balance wheel 5 is provided with a second transmission gear 51. The driving assembly 6 includes a left worm 61, a right worm 62, and a driving device 63 connected to the bracket 32, the left worm 61 is engaged with the first gear 41, the right worm 62 is engaged with the second gear 51, and the driving device 63 is used for driving the left worm 61 and the right worm 62 to rotate. When the angle and the position of the left balance wheel 4 and the right balance wheel 5 need to be adjusted, the driving device 63 drives the left worm 61 and the right worm 62 to rotate, and then the left worm 61 drives the left balance wheel 4 to rotate, the right worm 62 drives the right balance wheel 5 to rotate, and the rotation is stopped when the left balance wheel and the right balance wheel rotate to the proper positions. The left worm 61 and the right worm 62 are arranged above, so that the left balance wheel 4 and the right balance wheel 5 can be driven to rotate; in addition, when the left balance wheel 4 and the right balance wheel 5 rotate to proper positions, the left balance wheel 4 and the right balance wheel 5 are locked by utilizing the self-locking function of the worm gear and the worm so that the balance weight cannot rotate; when the numerical control turntable is under the working condition, the worm can drive the balance weight to synchronously move along with the pallet 2, so that the pallet 2 and the balance weight can be in a balance state at any position.
It will be appreciated that, in order to ensure that the left balance wheel 4 and the right balance wheel 5 are balanced, the left balance wheel 4 and the right balance wheel 5 have the same structure and size, and are symmetrically distributed at the same time, so that the moments with the same magnitude and opposite directions can be generated.
In this embodiment, the driving device 63 is a motor, referring to fig. 3-8, the output end of the driving device 63 is connected to the left worm 61, the left worm 61 is provided with a driving gear 611, and the right worm 62 is provided with a driven gear 621 engaged with the driving gear 611. In the above way, when the driving device 63 drives the left worm 61 to rotate through the driving gear 611 and the driven gear 621, the left worm 61 can synchronously drive the right worm 62 to reversely rotate, so that the left balance wheel 4 and the right balance wheel 5 are driven to synchronously reversely move, and the structure is simple.
In this embodiment, referring to fig. 3 to 8, the left balance wheel 4 is provided with a left hammer 42 and a left hollow portion 43, and the left hammer 42 and the left hollow portion 43 are both in a 180-degree sector shape and are centrally and symmetrically arranged; the right balance wheel 5 is provided with a right hammer body 52 and a right hollowed-out part 53, and the right hammer body 52 and the right hollowed-out part 53 are both in a sector shape of 180 degrees and are also arranged in a central symmetry manner; the left ram 42 and the right ram 52 are of equal mass. The left hammer body 42 is arranged on the left balance wheel 4, the left hollowed-out part 43 is arranged at the other position of the central symmetry on the left balance wheel 4, and the right balance wheel 5 is provided with the same structure, so that the mass of the left balance wheel 4 and the right balance wheel 5 is reduced, the influence on the rotating shaft core 3 is reduced, the rigidity of the rotating shaft core 3 is ensured, and the balance effect between the two balance wheels and the tray 2 is improved. In addition, the mass distribution of the two balance wheels is more uniform, so that the balance effect is further improved.
In this embodiment, the ratio between the diameter of the left balance wheel 4 and the thickness thereof is between 20:1 and 2:1, the ratio between the diameter of the right balance wheel 5 and the thickness thereof is between 20:1 and 2:1, in practice, the ratio between the diameter of the left balance wheel 4 and the thickness thereof is equal to the ratio between the diameter of the right balance wheel 5 and the thickness thereof, so that the quality of the left balance wheel 4 and the right balance wheel 5 can be ensured, the balance effect thereof is ensured, and simultaneously, the thickness of the left balance wheel and the right balance wheel 5 is also sufficiently reduced, which is beneficial to shortening the length of the rotating shaft core 3, ensuring the rigidity of the rotating shaft center, thereby further improving the balance effect between the two balance wheels and the tray 2.
In this embodiment, referring to fig. 3 to 8, the left hammer 42 is disposed on the side of the left balance wheel 4 away from the right balance wheel 5, and the right hammer 52 is disposed on the side of the right balance wheel 5 away from the left balance wheel 4, so that the gap between the left balance wheel 4 and the right balance wheel 5 can be reduced, the assembly of the left balance wheel 4 and the right balance wheel 5 is more compact, and in addition, the driving gear 611 and the driven gear 621 can adopt gears with smaller sizes, thereby reducing the material cost.
Example 2
The numerical control turntable with the gravity balancing function according to embodiment 1 requires adjustment of the angle and position of the two balance wheels on the numerical control turntable when workpieces of different masses are replaced or when a large change occurs between the workpieces after processing the workpieces. Based on this, the present embodiment provides a control method using the numerical control turntable as in embodiment 1, including the following steps:
Step one: the main shaft stops processing the workpiece, so that the interference problem caused by adjusting the angles and the positions of the two balance wheels in the processing process is avoided;
Step two: the motor drives the tray 2 to rotate from a horizontal state to a vertical state;
Step three: detecting the load of the motor in a vertical state;
Step four: if the load of the motor exceeds the rated value, the driving assembly 6 drives the left balance wheel 4 and the right balance wheel 5 to rotate, and the positions of the left balance wheel 4 and the right balance wheel 5 are readjusted. Specifically, the driving device 63 drives the left worm 61 to rotate, the left worm 61 drives the right worm 62 to rotate, and the left worm 61 and the right worm 62 rotate to further drive the left balance wheel 4 and the right balance wheel 5 to rotate, thereby adjusting the positions of the left balance wheel 4 and the right balance wheel 5. After the positions of the left balance wheel 4 and the right balance wheel 5 are adjusted, the third step is executed again;
If the load of the motor is within the rated value, the left balance wheel 4 and the right balance wheel 5 can be in a balanced state with the tray 2, and adjustment is completed.
It is to be understood that the above examples of the present utility model are provided by way of illustration only and not by way of limitation of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.
Claims (8)
1. The utility model provides a numerical control carousel with gravity balance function, includes the support and locates tray and motor on the support, the motor is used for the drive the tray is in rotate on the support, its characterized in that:
The device also comprises a rotating shaft core, a left balance wheel, a right balance wheel and a driving assembly; one end of the rotating shaft core is relatively fixed with the tray, and the other end of the rotating shaft core is fixedly connected with the driving assembly; the left balance wheels and the right balance wheels are equal in number and are both rotatably connected to the rotating shaft core; the driving assembly is used for driving the left balance wheel and the right balance wheel to synchronously and reversely rotate and is in limit fit with the left balance wheel and the right balance wheel under the working condition of the numerical control turntable.
2. The numerical control turntable with a gravity balancing function according to claim 1, wherein: the contours of the left balance wheel and the right balance wheel are circular, a first transmission tooth is arranged on the contour of the left balance wheel, and a second transmission tooth is arranged on the contour of the right balance wheel;
the driving assembly comprises a left worm meshed with the first transmission gear, a right worm meshed with the second transmission gear and a driving device for driving the left worm and the right worm to rotate.
3. The numerical control turntable with a gravity balancing function according to claim 2, wherein: the output end of the driving device is connected with the left worm, a driving gear is arranged on the left worm, and a driven gear meshed with the driving gear is arranged on the right worm.
4. The numerical control turntable with a gravity balancing function according to claim 2, wherein: the left balance wheel is provided with a left hammer body, and the right balance wheel is provided with a right hammer body.
5. The numerical control turntable with a gravity balancing function according to claim 4, wherein: the left hammer body is arranged on the side surface, far away from the right balance wheel, of the left balance wheel, and the right hammer body is arranged on the side surface, far away from the left balance wheel, of the right balance wheel.
6. The numerical control turntable with a gravity balancing function according to claim 4, wherein: the left balance wheel is provided with a left hollowed-out part, and the right balance wheel is provided with a right hollowed-out part.
7. The numerical control turntable with a gravity balancing function according to claim 6, wherein: the left hollowed-out part and the left hammer body are arranged in a central symmetry manner, and the right hollowed-out part and the right hammer body are arranged in a central symmetry manner.
8. The numerical control turntable with a gravity balancing function according to claim 1, wherein: the end part of the rotating shaft core, which is far away from the tray, is fixedly connected with a connecting rod, the end part of the connecting rod, which is far away from the rotating shaft core, is provided with a bracket, and the driving assembly is fixedly connected on the bracket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322297769.1U CN220838931U (en) | 2023-08-24 | 2023-08-24 | Numerical control turntable with gravity balance function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322297769.1U CN220838931U (en) | 2023-08-24 | 2023-08-24 | Numerical control turntable with gravity balance function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220838931U true CN220838931U (en) | 2024-04-26 |
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ID=90787088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322297769.1U Active CN220838931U (en) | 2023-08-24 | 2023-08-24 | Numerical control turntable with gravity balance function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220838931U (en) |
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2023
- 2023-08-24 CN CN202322297769.1U patent/CN220838931U/en active Active
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