CN215344256U - High-precision miniature anti-rotation push rod electric cylinder - Google Patents
High-precision miniature anti-rotation push rod electric cylinder Download PDFInfo
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- CN215344256U CN215344256U CN202121354080.2U CN202121354080U CN215344256U CN 215344256 U CN215344256 U CN 215344256U CN 202121354080 U CN202121354080 U CN 202121354080U CN 215344256 U CN215344256 U CN 215344256U
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- nut
- ball spline
- push rod
- electric cylinder
- connecting sleeve
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Abstract
The utility model relates to a high-precision miniature anti-rotation push rod electric cylinder which comprises a connector, a locking nut, a ball spline shaft, a connecting sleeve, a pin, a shell, a motor, a nut and a screw rod, wherein the locking nut is arranged on the connector; the locking nut, the ball spline shaft, the connecting sleeve, the nut and the screw rod are arranged in the shell; the motor is arranged at one end of the shell, and the ball spline nut is locked in a blind hole at the other end of the shell through a locking nut; the motor is connected with the screw rod, and the nut is sleeved on the screw rod in a sliding connection manner; the nut is fixedly connected with a connecting sleeve through a pin, and the connecting sleeve is fixedly connected with the ball spline shaft; the ball spline shaft passes through the ball spline nut and then is connected with the connector. Compared with the prior art, the utility model has the advantages of high operation efficiency, compact structure, ensured coaxiality and the like.
Description
Technical Field
The utility model relates to the field of miniature push rod electric cylinders, in particular to a high-precision miniature anti-rotation push rod electric cylinder.
Background
The push rod electric cylinder is a common mechanical part in the field of motion control, is mainly used for horizontal transportation and vertical lifting of objects, and mainly comprises a screw rod, a nut, a guide rail, a push rod, a motor and the like; the working principle is that an external controller controls the rotating speed and the rotating number of a motor, the motor drives a screw rod to rotate, and the screw rod makes linear motion on a driving nut and a push rod.
The traditional push rod electric cylinder adopts a push rod bushing structure, and is prevented from rotating by the guide block.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provide the high-precision miniature anti-rotation push rod electric cylinder which has the advantages of improving the precision, prolonging the service life, reducing the vibration during the operation of electric steel and ensuring the coaxiality.
The purpose of the utility model can be realized by the following technical scheme:
a high-precision miniature anti-rotation push rod electric cylinder comprises a connector, a locking nut, a ball spline shaft, a connecting sleeve, a pin, a shell, a motor, a nut and a screw rod;
the locking nut, the ball spline shaft, the connecting sleeve, the nut and the screw rod are arranged in the shell; the motor is arranged at one end of the shell, and the ball spline nut is locked in a blind hole at the other end of the shell through a locking nut; the motor is connected with the screw rod, and the nut is sleeved on the screw rod in a sliding connection manner; the nut is fixedly connected with a connecting sleeve through a pin, and the connecting sleeve is fixedly connected with the ball spline shaft; the ball spline shaft passes through the ball spline nut and then is connected with the connector.
As the preferred technical scheme, a key groove is formed in the ball spline nut, a shell threaded hole is formed in the shell, and the key groove is aligned to the shell threaded hole.
According to a preferable technical scheme, the ball spline shaft is provided with external threads and flat wires; the external thread is positioned at the shaft end, and the flat wire is positioned at the shaft shoulder adjacent to the external thread section.
Preferably, the number of the flat wires is 3, the flat wires are uniformly distributed along the circumferential direction of the outer surface of the ball spline shaft, and the angle interval between every two flat wires is 120 degrees.
As the preferred technical scheme, the connecting sleeve is provided with an internal thread and a threaded hole of the connecting sleeve.
As the preferred technical scheme, the number of the threaded holes of the connecting sleeves is 3, the threaded holes are uniformly distributed along the circumferential direction of the outer surface of the ball spline shaft, and the angle interval between every two threaded holes of the connecting sleeves is 120 degrees.
As a preferred technical scheme, the pin is provided with threads, two ends of the pin are respectively provided with a positioning cylinder and a screw head, wherein the head shape of the screw head is an inner hexagon, a straight groove or a cross groove.
As a preferred technical scheme, a positioning flange is arranged on one side of the shell, which is provided with the motor; the motor is fixedly connected with the shell through a positioning flange; the shell is in clearance fit with the positioning flange.
As the preferred technical scheme, the shell is provided with a positioning waist hole for providing a channel for sucking and discharging internal air, and the positioning waist hole is arranged at one end close to the motor.
As a preferred technical scheme, an encoder is arranged in the motor.
Compared with the prior art, the utility model has the following advantages:
1) compact structure
The high-precision miniature anti-rotation push rod electric cylinder adopts the connecting sleeve with a special structure to connect the ball spline shaft and the nut, and realizes the connection of the ball spline shaft and the nut on the premise of not increasing the sectional area of the shell;
2) the electric cylinder has high motion precision and efficiency
The high-precision miniature anti-rotation push rod electric cylinder is guided by the ball spline, rolling friction is adopted to replace sliding friction, and the high-precision miniature anti-rotation push rod electric cylinder is more stable in operation and higher in efficiency;
3) ensuring coaxiality
The motor flange of the high-precision miniature anti-rotation push rod electric cylinder is in clearance fit with the shell, and the coaxiality of the bushing, the nut and the motor can be easily ensured by adjusting the position of the motor.
Drawings
FIG. 1 is a schematic diagram of the explosion structure of the high-precision miniature anti-rotation push rod electric cylinder of the utility model;
FIG. 2 is a cross-sectional view of the high-precision miniature anti-rotation push rod electric cylinder of the present invention;
FIG. 3 is a cross-sectional view of the push rod assembly of the high precision miniature anti-rotation push rod electric cylinder of the present invention;
FIG. 4 is a front view of a lock nut of the high-precision micro anti-rotation push rod electric cylinder of the utility model;
FIG. 5 is a schematic view showing a first structural view of a ball spline shaft of the high-precision miniature anti-rotation push rod electric cylinder according to the present invention;
FIG. 6 is a schematic structural view II of the ball spline shaft of the high-precision miniature anti-rotation push rod electric cylinder of the utility model;
FIG. 7 is a first structural view of a connecting sleeve of the high-precision micro anti-rotation push rod electric cylinder according to the utility model;
FIG. 8 is a second structural view of the connecting sleeve of the high-precision miniature anti-rotation push rod electric cylinder of the utility model;
FIG. 9 is a first structural diagram of a pin of the high-precision micro anti-rotation push rod electric cylinder according to the present invention;
FIG. 10 is a second structural view of a pin of the high-precision micro anti-rotation push rod electric cylinder according to the present invention;
FIG. 11 is a schematic structural view of a nut of the high-precision micro anti-rotation push rod electric cylinder of the present invention;
FIG. 12 is a schematic structural view of the high-precision micro anti-rotation push rod cylinder for adjusting the coaxiality.
Wherein 1 is a connector, 2 is a locking nut, 3 is a ball spline nut, 4 is a ball spline shaft, 5 is a connecting sleeve, 6 is a pin, 7 is a shell, 8 is a motor, 9 is a nut, and 10 is a screw.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
The working principle of the high-precision miniature anti-rotation push rod electric cylinder in the embodiment is as follows: the motor 8 drives the screw rod 10 to rotate, and the ball spline shaft 4 is connected with the connecting sleeves 5 and the nuts 9 through screws and threads; the ball spline nuts 3 fixed in the housing 7 prevent the ball spline shaft 4 and the nuts 9 from rotating in the axial direction, and the nuts 9 convert the torque transmitted by the screw 10 into axial thrust, thereby enabling the ball spline shaft 4 to move in the axial direction.
The structure of the device is shown in figures 1 and 2, and mainly comprises a connector 1, a locking nut 2, a ball spline nut 3, a ball spline shaft 4, a connecting sleeve 5, a pin 6, a shell 7, a motor 8, a nut 9 and a screw rod 10, wherein the locking nut 2, the ball spline shaft 4, the connecting sleeve 5, the nut 9 and the screw rod 10 are respectively arranged in the shell 7, the motor 8 is arranged at one end of the shell 7, the ball spline nut 3 is locked in a blind hole at the other end of the shell 7 through the locking nut 2 and a set screw, the ball spline shaft 4 passes through the ball spline nut 3 and then is connected with the connector 1 through threads, the screw rod 10 is connected with a hollow shaft of the motor 8, the nut 9 is sleeved on the screw rod 10, the screw rod 10 is connected with the screw rod 10 in a sliding mode, the nut 9 is fixedly connected with the connecting sleeve 5 through the pin 6, the connecting sleeve 5 is fixedly connected with the ball spline shaft 4 through the set screw, and the screw rod 10 moves relative to the ball spline shaft 4 in the axial direction of the cavity.
The motor 8 in this embodiment is a hollow shaft motor.
As shown in fig. 4, a through hole is formed outside the lock nut 2, and the circlip pliers are inserted into the through hole to be assembled.
As shown in fig. 2 and 9, the key slot of the ball spline nut 3 is aligned with the threaded hole of the housing 7, and the ball spline nut 3 is limited to rotate along the axis of the cavity after the set screw is screwed into the threaded hole; the locking nut 2 is screwed into the shell 7 to limit the ball spline nut 3 to move along the axis of the cavity.
As shown in fig. 5 and 6, the ball spline shaft 4 has external threads at its shaft end and flat wires at its shoulder.
As shown in fig. 7 and 8, the connecting sleeve 5 is provided with internal threads and threaded holes, the threaded holes are uniformly distributed on the outer surface of the connecting sleeve 5 along the circumferential direction, and the angle interval between every two threaded holes is 120 °.
As shown in fig. 9 and 10, the pin 6 is similar to a hexagon socket head cap set screw, but the head shape is a straight groove.
As shown in fig. 8, the nut 9 is provided with a pin hole, and is in transition fit or interference fit with the pin 6.
As shown in fig. 3, the external thread of the ball spline shaft 4 is screwed into the internal thread of the connecting sleeve 5, and is rotated to the bottom and then retreated, so that one of the three threaded holes of the connecting sleeve 5 is aligned with the flat wire, and the set screw is screwed into the threaded hole to realize fixed connection.
As shown in fig. 3, the threaded hole of the connecting sleeve 5 is aligned with the pin hole of the nut 9, and the connecting sleeve 5 is fixedly connected with the nut 9 through the pin 6.
As shown in fig. 9, the housing 7 is provided with a positioning flange at one side where the motor 8 is installed, the motor 8 is fixedly connected with the housing 7 through the positioning flange, the radial fit clearance between the housing 7 and the positioning flange is larger than 0.1mm, the one-side fit clearance is larger than 0.05mm, the nut 9 is moved to one side of the motor 8 during assembly, the position of the motor 8 is adjusted, and the coaxiality of the ball spline nut 3, the nut 9 and the motor 8 can be easily ensured.
And finally assembling the motor 8, the nut 9 and the screw rod 10 to finally complete the integral assembly of the electric cylinder.
While the utility model has been described with reference to specific embodiments, the utility model is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the utility model. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A high-precision miniature anti-rotation push rod electric cylinder is characterized by comprising a connector (1), a locking nut (2), a ball spline nut (3), a ball spline shaft (4), a connecting sleeve (5), a pin (6), a shell (7), a motor (8), a nut (9) and a screw rod (10);
the locking nut (2), the ball spline shaft (4), the connecting sleeve (5), the nut (9) and the screw rod (10) are arranged in the shell (7); the motor (8) is installed at one end of the shell (7), and the ball spline nut (3) is locked in a blind hole at the other end of the shell (7) through the locking nut (2); the motor (8) is connected with the screw rod (10), and the nut (9) is connected with the screw rod (10) in a sliding and connecting way; the nut (9) is fixedly connected with the connecting sleeve (5) through a pin (6), and the connecting sleeve (5) is fixedly connected with the ball spline shaft (4); the ball spline shaft (4) penetrates through the ball spline nut (3) and then is connected with the connector (1).
2. The high-precision miniature anti-rotation push rod electric cylinder as claimed in claim 1, wherein the ball spline nut (3) is provided with a key groove, the housing (7) is provided with a housing threaded hole, and the key groove is aligned with the housing threaded hole.
3. The high-precision miniature anti-rotation push rod electric cylinder as claimed in claim 1, wherein the ball spline shaft (4) is provided with external threads and flat wires; the external thread is positioned at the shaft end, and the flat wire is positioned at the shaft shoulder adjacent to the external thread section.
4. The high-precision miniature anti-rotation push rod electric cylinder as claimed in claim 3, wherein the number of the flat wires is 3, the flat wires are uniformly distributed along the circumferential direction of the outer surface of the ball spline shaft (4), and the angle interval between every two flat wires is 120 degrees.
5. The high-precision miniature anti-rotation push rod electric cylinder as claimed in claim 1, wherein the connecting sleeve (5) is provided with internal threads and a threaded connecting sleeve hole.
6. The high-precision miniature anti-rotation push rod electric cylinder as claimed in claim 5, wherein the number of the connecting sleeve threaded holes is 3, the connecting sleeve threaded holes are uniformly distributed along the circumferential direction of the outer surface of the ball spline shaft (4), and the angle interval between every two connecting sleeve threaded holes is 120 degrees.
7. The high-precision micro anti-rotation push rod electric cylinder as claimed in claim 1, wherein the pin (6) is provided with a thread, and the two ends are respectively a positioning cylinder and a screw head, wherein the head shape of the screw head is a hexagon socket, a straight groove or a cross groove.
8. The high-precision micro anti-rotation push rod electric cylinder as claimed in claim 1, characterized in that the housing (7) is provided with a positioning flange at one side where the motor (8) is installed; the motor (8) is fixedly connected with the shell (7) through a positioning flange; the shell (7) is in clearance fit with the positioning flange.
9. The high-precision micro anti-rotation push rod electric cylinder as claimed in claim 1, wherein the shell (7) is provided with a positioning waist hole for providing a passage for the suction and discharge of internal air, and the positioning waist hole is arranged at one end close to the motor (8).
10. The high-precision micro anti-rotation push rod electric cylinder as claimed in claim 1, characterized in that an encoder is arranged in the motor (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121354080.2U CN215344256U (en) | 2021-06-18 | 2021-06-18 | High-precision miniature anti-rotation push rod electric cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121354080.2U CN215344256U (en) | 2021-06-18 | 2021-06-18 | High-precision miniature anti-rotation push rod electric cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN215344256U true CN215344256U (en) | 2021-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121354080.2U Active CN215344256U (en) | 2021-06-18 | 2021-06-18 | High-precision miniature anti-rotation push rod electric cylinder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114370457A (en) * | 2021-12-29 | 2022-04-19 | 中船重工中南装备有限责任公司 | Adjustable mechanical anti-loosening positioning device for rotating shaft and use method |
-
2021
- 2021-06-18 CN CN202121354080.2U patent/CN215344256U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114370457A (en) * | 2021-12-29 | 2022-04-19 | 中船重工中南装备有限责任公司 | Adjustable mechanical anti-loosening positioning device for rotating shaft and use method |
| CN114370457B (en) * | 2021-12-29 | 2024-01-02 | 中船重工中南装备有限责任公司 | Adjustable mechanical anti-loosening positioning device for rotating shaft and use method |
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