CN209811269U - Electric chuck driven by direct drive motor - Google Patents
Electric chuck driven by direct drive motor Download PDFInfo
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- CN209811269U CN209811269U CN201920396309.5U CN201920396309U CN209811269U CN 209811269 U CN209811269 U CN 209811269U CN 201920396309 U CN201920396309 U CN 201920396309U CN 209811269 U CN209811269 U CN 209811269U
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- bearing
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- chuck
- drive motor
- fixed support
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Abstract
The utility model provides an electric chuck driven by a direct drive motor, which relates to the field of clamping machine tool workpieces, and comprises a chuck main shaft, a fixed support and a bearing, wherein the direct drive motor comprises a motor rotor and a motor stator; the chuck main shaft and the motor rotor are jointly arranged on a rotating ring of the bearing, and the fixed support is connected with a non-rotating ring of the bearing; the chuck spindle is driven by the motor rotor. The utility model discloses technical scheme adopts and directly drives the motor and passes through parts such as bearing, chuck and directly link to each other with the load, has saved mechanical structure such as speed reducer, has improved the precision of system, has eliminated the efficiency loss that produces owing to using the speed reducer simultaneously, make full use of the energy.
Description
Technical Field
The utility model belongs to the machine tool work piece presss from both sides tight field, concretely relates to by directly driving motor drive's electric chuck.
Background
The chuck is a device used for clamping a workpiece to be processed on a machine tool, and the conventional machine tool chuck has the following three common driving modes in rotation: firstly, the motor is driven by the speed change gear, the output torque is increased by reducing the speed of a few pairs of gears, and the chuck spindle is suitable for the requirement on the output torque characteristic when the chuck spindle is at a low speed; the motor is driven by belt transmission, and the motor and the chuck spindle are driven by a synchronous toothed belt, so that the requirements on high speed and low torque are met; and thirdly, the two motors are used for respectively driving the chuck main shaft, the chuck main shaft is directly driven to rotate through a transmission belt at a high speed, the other motor drives the chuck main shaft to rotate through gear transmission at a low speed, and the gear plays roles in reducing the speed and expanding the speed change range.
However, in the numerical control machine tool, there are many kinematic pairs when the three chuck structures are driven, and the positioning accuracy or the repeated positioning accuracy of the chuck is greatly affected. The traditional structure that the servo motor and the speed reducer drive the chuck spindle to rotate is limited to the back clearance and the vibration of the speed reducer, the performance of the servo motor and the like, and the structure of the servo motor cannot meet the high-precision requirement of the modern industry.
SUMMERY OF THE UTILITY MODEL
By the kinematic pair quantity between motor to the chuck main shaft when reducing the chuck rotation, positioning accuracy and repeated positioning accuracy when improving present chuck rotation, the utility model provides a by directly driving motor drive's electric chuck to solve above-mentioned technical problem.
The utility model provides an electric chuck driven by a direct drive motor, which comprises a chuck main shaft, a fixed support, a bearing and a direct drive motor, wherein the direct drive motor comprises a motor rotor and a motor stator; the chuck spindle and the motor rotor are connected to a rotating ring of the bearing together, and the fixed support is connected with a non-rotating ring of the bearing; the chuck spindle is driven by a motor rotor.
Specifically, the bearing includes bearing inner race and bearing outer lane, the bearing inner race is the rolling circle, motor rotor passes through the rotor connecting plate and is connected with the bearing inner race, chuck main shaft is connected with the bearing inner race, motor stator installs the inboard at fixing support, the inboard at fixing support is installed to the bearing outer lane.
The electric chuck further comprises a left side pressing plate and a right side pressing plate, the left side pressing plate is connected with the motor stator and the fixed support respectively, and the right side pressing plate is connected with the bearing outer ring and the fixed support respectively.
The electric chuck further comprises an encoder, and the encoder is installed on the left side pressing plate and/or the motor rotor. The function of the encoder is to detect the displacement, angle, speed, angular velocity, position or count of the motor or chuck spindle motion for a closed loop control system or a semi-closed loop control system. The utility model discloses also can not install in open-loop control system the encoder. When an absolute value encoder is used, the current position can be identified without the need for origin reset. Therefore, the chuck is driven to rotate by the direct drive motor, and the chuck has the advantages of high positioning precision and repeated positioning precision and large driving torque at low speed.
Or, the bearing includes bearing inner race and bearing inner race, the bearing inner race is the rolling circle, chuck main shaft is connected with electric motor rotor, electric motor rotor passes through the rotor connecting plate and is connected with the bearing inner race, the bearing inner race is installed in one side of fixed bearing, motor stator passes through the stator connecting plate and is connected with the bearing inner race.
The rotor connecting plate is structurally matched with the stator connecting plate.
Further, the fixed support is arranged on the machine tool.
The beneficial effects of the utility model reside in that, 1 the utility model provides a by directly driving motor drive's electric chuck, it adopts and directly drives the motor and passes through parts such as bearing, chuck and directly link to each other with the load, has saved mechanical structure such as speed reducer, has improved the precision of system, has eliminated the efficiency loss that produces owing to use the speed reducer, make full use of the energy. 2. By adopting the direct connection mode, the positioning error generated by the mechanical structure is reduced, the processing precision is ensured, the error in the aspect of size generated by the friction of the mechanical structure is reduced, and the noise and the like during use are reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of an electric chuck according to embodiment 1 of the present invention.
Fig. 2 is a right side view of the electric chuck according to embodiment 1 of the present invention.
Fig. 3 is a left side view of the electric chuck according to embodiment 1 of the present invention.
Fig. 4 is a schematic structural view of an electric chuck according to embodiment 2 of the present invention.
Fig. 5 is a partial enlarged view of the portion i in fig. 4.
In the figure, 100, a direct drive motor 101, a motor rotor 102, a motor stator 201, a left side pressure plate 202, a fixed support 203, a right side pressure plate 301, a chuck spindle 302, a jaw 400, an encoder 500, a cross roller bearing 501, a bearing outer ring 502, a bearing roller 503, a bearing inner ring 601, a rotor connecting plate 602, a stator connecting plate 999 and a workpiece to be processed.
Detailed Description
In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
Example 1
As shown in fig. 1, an electric chuck driven by a direct drive motor comprises a direct drive motor 100, a left side pressure plate 201, a fixed support 202, a right side pressure plate 203, a chuck spindle 301, a jaw 302 and a bearing. The direct drive motor 100 comprises a motor rotor 101 and a motor stator 102, wherein the chuck spindle 301 and the motor rotor 101 are jointly connected to a rotating ring of a bearing, and the fixed support 202 is connected with a non-rotating ring of the bearing.
In this embodiment, the bearing is a cross roller bearing 500, which includes a bearing outer ring 501, a bearing roller 502, and a bearing inner ring 503, where the bearing outer ring 501 is a non-rotating ring, and the bearing inner ring 503 is a rotating ring. The motor rotor 101 is connected with a rotor connecting plate 601 through a fastener, the rotor connecting plate 601 is connected with a bearing inner ring 503 through a fastener, the chuck spindle 301 is connected with the bearing inner ring 503 through a fastener, and the motor stator 102 is installed on the inner side of the fixed support 202.
The left side pressing plate 201 is connected with the motor stator 102 through a fastener, the left side pressing plate 201 is connected with the fixed support 202 through a fastener, the bearing outer ring 501 is installed on the inner side of the fixed support 202, the right side pressing plate 203 is connected with the bearing outer ring 501 through a fastener, and the right side pressing plate 203 is connected with the fixed support 202 through a fastener. The connecting structure saves equipment such as a speed reducer and the like, improves the precision of the system, eliminates the efficiency loss caused by the use of the speed reducer, and fully utilizes energy.
The fastener can adopt a connecting bolt, a connecting screw or other structures capable of connecting and fastening two objects.
The fixed support 202 is installed at a desired position of the machine tool, and preferably, the left side press plate 201 and the motor rotor 101 are respectively provided with an encoder 400.
When the direct drive motor 100 is powered on, the motor rotor 101 starts to rotate, the motor rotor 101 drives the chuck spindle 301 to rotate through the rotor connecting plate 601, in a closed-loop control system or a semi-closed-loop control system, the angle change of the motor rotor 101 is detected through the encoder 400, and the rotation angle, the angular velocity or the angular acceleration of the chuck spindle 301 is controlled through the closed-loop control system or the semi-closed-loop control system.
The connection form of the jaws 302 to the chuck 301 is a common structure in the art and is not specifically described herein.
The advantages of this embodiment are: in the embodiment, the direct drive motor 100 drives the chuck spindle 301 to rotate, and a direct connection mode is adopted, so that the positioning error caused by a mechanical structure is reduced, the machining precision is ensured, the error in the aspect of size caused by friction of the mechanical structure is reduced, and the noise and the like during use are reduced. In addition, when an absolute value encoder is used, the current position can be recognized without resetting the origin. The direct drive motor 100 is a high-precision motor, has the characteristics of high precision, high torque and high rigidity, and is simple to install, low in noise during operation and high in response speed. The utility model discloses in drive the chuck rotation through directly driving motor 100, it is high to have positioning accuracy and repeated positioning accuracy, advantage that driving torque is big under the low-speed.
Example 2
The difference between this embodiment and embodiment 1 is that, in this embodiment, the bearing adopts a cross roller bearing 500, which includes a bearing outer ring 501, a bearing roller 502, and a bearing inner ring 503, where the bearing outer ring 501 is a rotating ring and the bearing inner ring 503 is a non-rotating ring.
Specifically, as shown in fig. 4 and 5, the chuck spindle 301 is connected to the motor rotor 101, the motor rotor 101 is connected to the bearing outer ring 501 through a rotor connecting plate 601, the bearing inner ring 503 is installed on one side of the fixed support 202, and the motor stator 102 is connected to the bearing inner ring 503 through a stator connecting plate 602. The rotor connecting plate 601 is structurally matched with the stator connecting plate 602.
Compared with the connecting structure of the embodiment 1, the structure further saves the left pressing plate 201 and the right pressing plate 203, and the stator connecting plate 602 is additionally arranged, so that the connecting structure of the connecting structure is more compact than that of the embodiment 1, the number of kinematic pairs is reduced, and the precision of the system is further improved.
The utility model discloses technical scheme adopts and directly drives the motor and passes through parts such as bearing, chuck and directly link to each other with the load, has saved mechanical structure such as speed reducer, has improved the precision of system, has eliminated the efficiency loss that produces owing to using the speed reducer simultaneously, make full use of the energy. Meanwhile, the positioning error generated by the mechanical structure is reduced, so that the processing precision is ensured, the error in the aspect of size generated by the friction of the mechanical structure is reduced, and the noise and the like during use are reduced.
Although the present invention has been described in detail by referring to the drawings in conjunction with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and substance of the present invention, and these modifications or substitutions are intended to be within the scope of the present invention/any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. An electric chuck driven by a direct drive motor, characterized in that: the direct-drive motor comprises a chuck spindle (301), a fixed support (202), a bearing and a direct-drive motor (100), wherein the direct-drive motor (100) comprises a motor rotor (101) and a motor stator (102); the chuck main shaft (301) and the motor rotor (101) are connected to a rotating ring of a bearing together, and the fixed support (202) is connected with a non-rotating ring of the bearing; the chuck spindle (301) is driven by a motor rotor (101).
2. The electric chuck driven by a direct drive motor as set forth in claim 1, wherein: the bearing comprises a bearing inner ring and a bearing outer ring, the bearing inner ring is a rotating ring, the motor rotor (101) is connected with the bearing inner ring (503) through a rotor connecting plate (601), the chuck spindle (301) is connected with the bearing inner ring (503), the motor stator (102) is installed on the inner side of the fixed support (202), and the bearing outer ring (501) is installed on the inner side of the fixed support (202).
3. The electric chuck driven by a direct drive motor as set forth in claim 2, wherein: the motor stator pressing plate comprises a left pressing plate (201) and a right pressing plate (203), wherein the left pressing plate (201) is connected with a motor stator (102) and a fixed support (202) respectively, and the right pressing plate (203) is connected with a bearing outer ring (501) and the fixed support (202) respectively.
4. The electric chuck driven by a direct drive motor as set forth in claim 3, wherein: comprises an encoder (400), wherein the encoder (400) is arranged on the left pressure plate (201) and/or the motor rotor (101).
5. The electric chuck driven by a direct drive motor as set forth in claim 1, wherein: the bearing comprises a bearing outer ring and a bearing inner ring, the bearing outer ring is a rotating ring, the chuck spindle (301) is connected with the motor rotor (101), the motor rotor (101) is connected with the bearing outer ring (501) through a rotor connecting plate (601), the bearing inner ring (503) is installed on one side of the fixed support (202), and the motor stator (102) is connected with the bearing inner ring (503) through a stator connecting plate (602).
6. The electric chuck driven by a direct drive motor as set forth in claim 5, wherein: and the rotor connecting plate (601) is structurally matched with the stator connecting plate (602).
7. The electric chuck driven by a direct drive motor as set forth in claim 1, 2 or 5, wherein: the fixed support (202) is mounted on the machine tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920396309.5U CN209811269U (en) | 2019-03-26 | 2019-03-26 | Electric chuck driven by direct drive motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920396309.5U CN209811269U (en) | 2019-03-26 | 2019-03-26 | Electric chuck driven by direct drive motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209811269U true CN209811269U (en) | 2019-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920396309.5U Active CN209811269U (en) | 2019-03-26 | 2019-03-26 | Electric chuck driven by direct drive motor |
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| CN (1) | CN209811269U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110860705A (en) * | 2018-08-28 | 2020-03-06 | 薛富盛 | Non-contact type electric energy transmission high-frequency vibration main shaft system and restraint piece manufacturing method |
| CN113059366A (en) * | 2021-03-25 | 2021-07-02 | 山东豪迈机械科技股份有限公司 | Numerical control rotary table and numerical control machine tool comprising same |
-
2019
- 2019-03-26 CN CN201920396309.5U patent/CN209811269U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110860705A (en) * | 2018-08-28 | 2020-03-06 | 薛富盛 | Non-contact type electric energy transmission high-frequency vibration main shaft system and restraint piece manufacturing method |
| US11654493B2 (en) | 2018-08-28 | 2023-05-23 | National Chung Hsing University | High frequency vibration spindle system with noncontact power transmission and method for manufacturing a restraining part used therein |
| CN113059366A (en) * | 2021-03-25 | 2021-07-02 | 山东豪迈机械科技股份有限公司 | Numerical control rotary table and numerical control machine tool comprising same |
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