CN111614200A - Turning-back planetary roller screw type servo electric cylinder - Google Patents
Turning-back planetary roller screw type servo electric cylinder Download PDFInfo
- Publication number
- CN111614200A CN111614200A CN201910141605.5A CN201910141605A CN111614200A CN 111614200 A CN111614200 A CN 111614200A CN 201910141605 A CN201910141605 A CN 201910141605A CN 111614200 A CN111614200 A CN 111614200A
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- Prior art keywords
- motor
- gear
- planetary roller
- screw
- roller screw
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/102—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction brakes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention relates to an electric cylinder, in particular to a turn-back planetary roller screw type servo electric cylinder, which comprises a driving device, a transmission device and an execution device, wherein the driving device is connected with the transmission device; the driving device comprises a driving motor and a braking device, the transmission device comprises a speed reducer, a gear pair and a shell, and the speed reducer and the gear pair are arranged in the shell; the actuating device comprises a cylinder body, a planetary roller screw pair and a push rod; the planetary roller screw pair and the push rod are arranged in the cylinder body, the planetary roller screw pair comprises a screw nut and a screw rod, and the push rod is fixedly connected with the screw nut; the driving motor drives the screw rod to rotate through the speed reducer and the gear pair, the screw rod drives the screw rod nut to do linear reciprocating motion after rotating, so that the push rod is driven to do linear reciprocating motion, and the brake device is used for braking the driving motor. The turn-back planetary roller screw rod type servo electric cylinder has the characteristics of small axial size, high thrust, reverse rotation prevention and servo control.
Description
Technical Field
The invention relates to an electric cylinder, in particular to a turn-back planetary roller screw type servo electric cylinder.
Background
The traditional hydraulic cylinder converts pressure energy provided by an oil pump into mechanical energy so as to drive the hydraulic cylinder to do linear reciprocating motion; the air cylinder drives the piston connecting rod to do linear reciprocating motion by means of compressed air provided by the compressor; the working principle of the electric cylinder is different from the two linear actuating mechanisms, and the working principle of the electric cylinder is to use various types of motors as power sources, such as an alternating current servo motor, a stepping motor and a direct current brushless motor; the motor rotor drives the screw rod or the nut to rotate, the screw motion between the components is converted into the linear motion of the nut or the screw rod, and then the nut or the screw rod drives the cylinder barrel or the load to do linear reciprocating motion.
With the increase of the application field of the electric cylinder, the requirement of a client on the electric cylinder is higher and higher, and certain industries put forward higher requirements on the axial size of the electric cylinder due to the limitation of space; in addition, when the electric cylinder moves in some special occasions, the anti-reversion function is required.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides a turning-back planetary roller screw type servo electric cylinder which has the functions of small axial size, high thrust, reverse rotation prevention and servo control.
The technical scheme for solving the problems is as follows: the utility model provides a planetary roller screw rod formula servo electronic jar turns back which characterized in that:
comprises a driving device, a transmission device and an executing device;
the driving device comprises a driving motor and a braking device, and the driving motor is a conical permanent magnet synchronous motor;
the transmission device comprises a speed reducer, a gear pair and a shell, wherein the speed reducer and the gear pair are arranged in the shell;
the actuating device comprises a cylinder body, a planetary roller screw pair and a push rod; the planetary roller screw pair and the push rod are arranged in the cylinder body, the planetary roller screw pair comprises a screw nut and a screw, and the push rod is fixedly connected with the screw nut;
the driving motor drives the screw rod to rotate through the speed reducer and the gear pair, the screw rod drives the screw rod nut to do linear reciprocating motion after rotating, so that the push rod is driven to do linear reciprocating motion, and the brake device is used for braking the driving motor.
Further, the conical permanent magnet synchronous motor comprises a motor rear end cover, a first supporting sleeve, a second supporting sleeve, a motor shell, a stator, a rotor, a motor spindle and a motor front end cover;
the stator is fixed in a motor shell, a first supporting sleeve and a second supporting sleeve are respectively and fixedly connected with a motor rear end cover and a motor front end cover, a first supporting ring and a second supporting ring are respectively sleeved in the first supporting sleeve and the second supporting sleeve, a motor spindle is fixed on the first supporting ring and the second supporting ring through a bearing, a rotor is arranged on the motor spindle, and a permanent magnet is arranged in the rotor;
the brake device comprises a locking nut, a brake wheel friction ring, a motor rear end cover friction ring and a spring, wherein the brake wheel is fixed at one end of the motor main shaft through the locking nut, the brake wheel friction ring and the motor rear end cover friction ring are respectively fixed on the brake wheel and the motor rear end cover, and the spring is arranged between the first supporting ring and a shaft shoulder of the motor main shaft.
Further, the speed reducer is a planetary gear speed reducer.
Furthermore, the planetary gear reducer comprises a planet carrier, a planetary gear reducer output shaft, a sun gear, a gear ring and a planet gear; the gear pair comprises a driving gear and a driven gear;
the gear ring is fixed in the shell, the planet wheel is fixed on the planet carrier through the planet wheel shaft, the output end of the motor main shaft is connected with the sun gear, the output end of the planet gear reducer is connected with the driving gear, the driving gear is engaged with the driven gear, and the driven gear is connected with the screw rod.
Further, the output shaft of the planetary gear reducer transmits rotation to the driving gear through the first coupler, and the driven gear transmits rotation to the screw rod through the second coupler.
Furthermore, the output end of the motor main shaft is connected with the sun gear through a key.
Further, the cylinder body is connected with the shell in a welding mode.
The invention has the advantages that:
1) the invention provides a turn-back planetary roller screw rod type servo electric cylinder, wherein the electric cylinder integrally adopts a turn-back type, so that the axial size of the electric cylinder is smaller;
2) the roller screw capable of bearing larger load is used as an actuating mechanism, so that the electric cylinder can output large thrust;
3) according to the turn-back planetary roller screw rod type servo electric cylinder, the driving motor is a conical motor with a brake device, so that the electric cylinder has an anti-reverse self-locking function and can be unlocked flexibly;
4) the invention relates to a turn-back planetary roller screw type servo electric cylinder, wherein an electric cylinder driving device of the turn-back planetary roller screw type servo electric cylinder adopts a permanent magnet synchronous motor, and the servo control of the electric cylinder can be realized.
Drawings
Fig. 1 is a schematic structural view of an electric cylinder of the present invention.
Wherein: 1-locking a nut; 2-a brake wheel; 3-a brake wheel friction ring; 4-a friction ring of the rear end cover of the motor; 5-motor rear end cover; 6-a first support sleeve; 7-a first support ring; 8-motor housing; 9-a stator; 10-a rotor; 11-a motor spindle; 12-motor front end cover; 13-a second support sleeve; 14-a second support ring; 15-a gear ring; 16-a planet wheel; 17-a sun gear; 18-planetary gear reducer output shaft; 19-a first coupling; 20-gear pair; 21-a second coupling; 22-a housing; 23-a planet carrier; 24-cylinder body; 25-lead screw nut; 26-end retainer ring; 27-a screw roller; 28-lead screw; 29-a push rod; 30-spring.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but 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, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the 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, are within the scope of the present invention.
Referring to fig. 1, a turning-back planetary roller screw type servo electric cylinder mainly comprises three parts: firstly, a driving device; secondly, a transmission device; and thirdly, an executing device.
The driving device comprises a driving motor and a braking device, the driving motor is a conical permanent magnet synchronous motor, the transmission device comprises a planetary gear reducer, a gear pair 20 and a shell 22, and the planetary gear reducer and the gear pair 20 are arranged in the shell 22; the actuating device comprises a cylinder body 24, a planetary roller screw pair and a push rod 29; the planetary roller screw pair and the push rod 29 are arranged in the cylinder body 24, the planetary roller screw pair comprises a screw nut 25, an end retainer ring 26, a screw roller 27 and a screw 28, and the push rod 29 is fixedly connected with the screw nut 25;
the driving motor drives the screw rod 28 to rotate through the planetary gear reducer and the gear pair 20, the screw rod 28 drives the screw rod nut 25 to do linear reciprocating motion after rotating, so that the push rod 29 is driven to do linear reciprocating motion, and the brake device is used for braking the driving motor.
The toper PMSM includes motor rear end housing 5, first supporting sleeve 6, second supporting sleeve 13, motor housing 8, stator 9, rotor 10, motor spindle 11, motor front end housing 12, stator 9 is fixed in motor housing 8, first supporting sleeve 6 and second supporting sleeve 13 respectively with motor rear end housing 5 and motor front end housing 12 fixed connection, first supporting ring 7 and second supporting ring 14 are established respectively in first supporting sleeve 6 and second supporting sleeve 13, motor spindle 11 passes through the bearing to be fixed on first supporting ring 7 and second supporting ring 14, rotor 10 sets up on motor spindle 11, be equipped with the permanent magnet in the rotor 10.
The brake device comprises a locking nut 1, a brake wheel 2, a brake wheel friction ring 3, a motor rear end cover friction ring 4 and a spring 30, wherein the brake wheel 2 is fixed at one end of a motor spindle 11 through the locking nut 1, the brake wheel friction ring 3 and the motor rear end cover friction ring 4 are respectively fixed on the brake wheel 2 and the motor rear end cover 5, and the spring 30 is arranged between a first support ring 7 and a shaft shoulder of the motor spindle 11.
The planetary gear reducer mainly comprises a gear ring 15, a planetary gear 16, a sun gear 17, a planetary gear reducer output shaft 18 and a planetary carrier 23, wherein the planetary carrier 23 is fixed through a planetary gear shaft and a matched bearing, the gear ring 15 is fixed on a shell 22, the output end of a motor main shaft 11 is connected with the sun gear 17 at the input end of the planetary gear reducer through a key, the planetary gear reducer output shaft 18 at the output end of the planetary gear reducer transmits rotation to a gear 20 through a first coupler 19, the gear 20 transmits the rotation to a screw rod 28 through a second coupler 21, and the planetary gear reducer output shaft 18, the gear 20 and the screw rod 28 are respectively supported through corresponding bearings and bearing seats thereof.
The actuator is a planetary roller screw, and mainly comprises a cylinder body 24, a screw nut 25, an end retainer 26, a screw roller 27, a screw 28 and a push rod 29. The shell 22 is connected with the cylinder body 24 in a welding mode, the screw nut 25, the screw roller 27 and the screw 28 are connected through threads, the screw nut 25 is fixed on the end portion retainer ring 26, the screw nut 25 is connected with the push rod 29 through bolts, the push rod 29 is provided with a lug seat for connection, and the push rod 29 moves linearly in a reciprocating mode along with the screw nut 25 in the cylinder body 24.
The working principle of the invention is as follows:
after the winding of the stator 9 is electrified, the rotor 10 moves upwards under the action of axial magnetic pull force, so that the stator and rotor cores are aligned, the brake wheel friction ring 3 on the brake wheel 2 is pushed to be separated from the motor rear end cover friction ring 4 on the motor rear end cover 5, and the motor spindle 11 drives the screw rod 28 to rotate through the planetary gear reducer, so that the push rod 29 reciprocates; after the push rod 29 reaches a preset position, a winding power supply of the stator 9 is disconnected, the spring 30 overcomes the inherent axial magnetic pulling force of the permanent magnet synchronous motor, the rotor 10 is pushed to move downwards, the stator iron core and the rotor iron core are staggered, the brake wheel friction ring 3 on the brake wheel 2 is tightly pressed on the motor rear end cover friction ring 4 on the motor rear end cover 5, the motor spindle 11 brakes, the position of the push rod 29 is maintained to be fixed, and therefore the purpose of preventing the electric cylinder from reversing is achieved. Compared with a common ball screw, the planetary roller screw can bear larger load, so that the aim of large thrust of the electric cylinder can be fulfilled. By using the conical permanent magnet synchronous motor, servo of the electric cylinder can be realized, and the motion position can be accurately controlled.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures or equivalent flow transformations made by the present specification and drawings, or applied directly or indirectly to other related systems, are included in the scope of the present invention.
Claims (7)
1. The utility model provides a planetary roller screw formula servo electronic jar of turning back which characterized in that:
comprises a driving device, a transmission device and an executing device;
the driving device comprises a driving motor and a braking device, and the driving motor is a conical permanent magnet synchronous motor;
the transmission device comprises a speed reducer, a gear pair (20) and a shell (22), wherein the speed reducer and the gear pair (20) are arranged in the shell (22);
the actuating device comprises a cylinder body (24), a planetary roller screw pair and a push rod (29); the planetary roller screw pair and the push rod (29) are arranged in the cylinder body (24), the planetary roller screw pair comprises a screw nut (25) and a screw (28), and the push rod (29) is fixedly connected with the screw nut (25);
the driving motor drives the screw rod (28) to rotate through the speed reducer and the gear pair (20), the screw rod (28) is driven to do linear reciprocating motion after rotating, the screw rod nut (25) is driven to do linear reciprocating motion, so that the push rod (29) is driven to do linear reciprocating motion, and the brake device is used for braking the driving motor.
2. A reentry planetary roller screw type servo electric cylinder according to claim 1, characterized in that: the conical permanent magnet synchronous motor comprises a motor rear end cover (5), a first supporting sleeve (6), a second supporting sleeve (13), a motor shell (8), a stator (9), a rotor (10), a motor spindle (11) and a motor front end cover (12),
the motor comprises a stator (9), a first supporting sleeve (6), a second supporting sleeve (13), a motor rear end cover (5) and a motor front end cover (12), a first supporting ring (7) and a second supporting ring (14), a motor spindle (11) and a rotor (10), wherein the stator (9) is fixed in a motor shell (8), the first supporting sleeve (6) and the second supporting sleeve (13) are fixedly connected with the motor rear end cover (5) and the motor front end cover (12) respectively, the first supporting ring (7) and the second supporting ring (14) are sleeved in the first supporting sleeve (6) and the second supporting sleeve (13) respectively, the motor spindle (11) is fixed on the first supporting ring (7) and the second;
the brake device comprises a locking nut (1), a brake wheel (2), a brake wheel friction ring (3), a motor rear end cover friction ring (4) and a spring (30), wherein the brake wheel (2) is fixed at one end of a motor main shaft (11) through the locking nut (1), the brake wheel friction ring (3) and the motor rear end cover friction ring (4) are fixed on the brake wheel (2) and the motor rear end cover (5) respectively, and the spring (30) is arranged between shaft shoulders of the first support ring (7) and the motor main shaft (11).
3. A reentry planetary roller screw type servo electric cylinder according to claim 2, characterized in that: the speed reducer is a planetary gear speed reducer.
4. A reentry planetary roller screw type servo electric cylinder according to claim 3, characterized in that: the planetary gear reducer comprises a planet carrier (23), a planetary gear reducer output shaft (18), a sun gear (17), a gear ring (15) and a planetary gear (16); the gear pair (20) comprises a driving gear and a driven gear;
the gear ring (15) is fixed in the shell (22), the planet wheel (16) is fixed on the planet carrier (23) through the planet wheel (16) shaft, the output end of the motor spindle (11) is connected with the sun wheel (17), the output end of the planet gear reducer is connected with the driving gear through the planet gear reducer output shaft (18), the driving gear is meshed with the driven gear, and the driven gear is connected with the screw rod (28).
5. A reentry planetary roller screw type servo electric cylinder according to claim 4, characterized in that: the planetary gear reducer output shaft (18) transmits rotation to the driving gear through a first coupling (19), and the driven gear transmits rotation to the lead screw (28) through a second coupling (21).
6. A reentry planetary roller screw type servo electric cylinder according to claim 5, characterized in that: the output end of the motor main shaft (11) is connected with the sun gear (17) through a key.
7. A reentry planetary roller screw type servo electric cylinder according to claim 6, characterized in that: the cylinder body (24) is connected with the shell (22) in a welding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910141605.5A CN111614200A (en) | 2019-02-26 | 2019-02-26 | Turning-back planetary roller screw type servo electric cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910141605.5A CN111614200A (en) | 2019-02-26 | 2019-02-26 | Turning-back planetary roller screw type servo electric cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111614200A true CN111614200A (en) | 2020-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910141605.5A Pending CN111614200A (en) | 2019-02-26 | 2019-02-26 | Turning-back planetary roller screw type servo electric cylinder |
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| Country | Link |
|---|---|
| CN (1) | CN111614200A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112134402A (en) * | 2020-09-23 | 2020-12-25 | 西安索睿科技有限公司 | Telescopic boom structure based on redundant double-motor stepless speed regulation |
| CN112737211A (en) * | 2021-02-05 | 2021-04-30 | 黄河科技学院 | Novel electric cylinder |
| CN114940112A (en) * | 2022-04-29 | 2022-08-26 | 东北林业大学 | Fully-electric automobile tail plate based on planet roller screw electric cylinder and working method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202206245U (en) * | 2011-08-26 | 2012-04-25 | 苏州多凯复合材料有限公司 | Manual-electric non-conversion brake motor |
| CN206149082U (en) * | 2016-07-01 | 2017-05-03 | 浙江捷昌线性驱动科技股份有限公司 | Electric pushing rod |
| CN207053349U (en) * | 2017-07-28 | 2018-02-27 | 郑州建通机械制造有限公司 | Double-speed motor |
| CN208226776U (en) * | 2018-04-16 | 2018-12-11 | 沈阳中之杰流体控制系统有限公司 | It can bear the multi-stage electric cylinder of lateral force |
-
2019
- 2019-02-26 CN CN201910141605.5A patent/CN111614200A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202206245U (en) * | 2011-08-26 | 2012-04-25 | 苏州多凯复合材料有限公司 | Manual-electric non-conversion brake motor |
| CN206149082U (en) * | 2016-07-01 | 2017-05-03 | 浙江捷昌线性驱动科技股份有限公司 | Electric pushing rod |
| CN207053349U (en) * | 2017-07-28 | 2018-02-27 | 郑州建通机械制造有限公司 | Double-speed motor |
| CN208226776U (en) * | 2018-04-16 | 2018-12-11 | 沈阳中之杰流体控制系统有限公司 | It can bear the multi-stage electric cylinder of lateral force |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112134402A (en) * | 2020-09-23 | 2020-12-25 | 西安索睿科技有限公司 | Telescopic boom structure based on redundant double-motor stepless speed regulation |
| CN112737211A (en) * | 2021-02-05 | 2021-04-30 | 黄河科技学院 | Novel electric cylinder |
| CN114940112A (en) * | 2022-04-29 | 2022-08-26 | 东北林业大学 | Fully-electric automobile tail plate based on planet roller screw electric cylinder and working method thereof |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20200901 |