CN111786495A - Short zero-length electric cylinder device - Google Patents
Short zero-length electric cylinder device Download PDFInfo
- Publication number
- CN111786495A CN111786495A CN202010613013.1A CN202010613013A CN111786495A CN 111786495 A CN111786495 A CN 111786495A CN 202010613013 A CN202010613013 A CN 202010613013A CN 111786495 A CN111786495 A CN 111786495A
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- motor
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- end cover
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- 238000004904 shortening Methods 0.000 abstract description 4
- 238000005096 rolling process Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
- H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention provides a short zero-length electric cylinder device, which abandons the structures of a coupler of a motor output shaft and a screw rod, a flange seat for mounting a motor, a bearing seat for supporting the screw rod to rotate and the like on an electric cylinder in the prior art, thereby realizing the purpose of greatly shortening the zero length of the electric cylinder, and the invention comprises a motor assembly and a cylinder body assembly, wherein the motor assembly comprises a stator, a rotor, a motor shell, a motor front end cover and a motor rear end cover, the cylinder body assembly comprises a cylinder barrel, a piston rod, the screw rod and a screw rod nut, the stator is fixed in the motor shell, the rotor is arranged in the stator, a through hole is arranged in the center of the rotor, the motor front end cover and the motor rear end cover are respectively connected with two ends of the motor shell, one end of the cylinder barrel is fixedly connected with the motor front end cover, the piston rod is arranged in the cylinder barrel, the screw rod nut is sleeved outside the screw rod and fixedly connected with the piston rod.
Description
Technical Field
The invention relates to the technical field of electric cylinders, in particular to a short-zero-length electric cylinder device.
Background
The electric cylinder is a modularized product which combines a servo motor and a lead screw, and mainly comprises the parts such as the servo motor, a motor mounting flange, a bearing seat, the lead screw, a coupling, a piston rod, a cylinder barrel and the like. The motor drives the screw rod to do rotary motion, and the screw rod nut converts the rotary motion into reciprocating linear motion, so that the piston rod connected with the screw rod nut is driven to do telescopic motion in the cylinder barrel. When the piston rod is fully extended, the total length of the electric cylinder is the longest cylinder length. When the piston rod is completely retracted, the total length of the electric cylinder is the shortest cylinder length. The difference between the longest cylinder length and the shortest cylinder length is the electric cylinder stroke, and the difference between the shortest cylinder length and the electric cylinder stroke is zero length. For the application occasion that the space is compacter, short zero-length electronic jar is conveniently arranged. Meanwhile, for the application occasions with the same stroke, the short zero-length electric cylinder can reduce the overall size of the equipment, so that the design cost of the equipment is reduced, and the motion envelope space of the equipment is reduced. Finally, for the structural design of the electric cylinder, the zero length shortening can reduce the production cost. Therefore, it is necessary to develop a short-zero-length electric cylinder device.
Disclosure of Invention
The invention provides a short-zero-length electric cylinder device, which abandons the structures of a coupler of a motor output shaft and a screw rod, a flange seat for mounting a motor, a bearing seat for supporting the screw rod to rotate and the like on an electric cylinder in the prior art, and achieves the purpose of greatly shortening the zero length of the electric cylinder.
The technical scheme of the invention is as follows: including motor element and cylinder body subassembly, motor element includes stator, rotor, motor housing, motor front end housing and motor rear end cap, and the cylinder body subassembly includes cylinder, piston rod, lead screw, screw-nut, in the stator is fixed in motor housing, in the stator was located to the rotor, rotor central authorities were equipped with the through-hole, motor front end housing and motor rear end cap are connected with motor housing both ends respectively, cylinder one end and motor front end housing fixed connection, in the cylinder was located to the piston rod, lead screw one end and rotor central authorities through-hole interference fit, the other end passed the motor front end housing, insert to the piston rod in, the piston rod other end stretches out outside the cylinder, the screw-nut cover is established outside the lead screw, screw-nut and piston rod fixed connection.
Preferably, a stepped through hole is formed in the center of the front end cover of the motor, a large-diameter hole of the stepped through hole faces one side of the motor shell, a rolling bearing is arranged in the large-diameter hole, an inner hole of the rolling bearing is matched with the screw rod, a bearing pressing plate and a locking nut are arranged on the end face, facing one side of the motor shell, of the rolling bearing, and the locking nut is sleeved on the screw rod.
Preferably, the outer circular surface of the rear end cover of the motor is of a stepped shaft structure, the inner hole is a stepped hole, a small-diameter shaft section of the stepped shaft structure is located in the motor shell, a small-diameter hole section of the inner hole of the rear end cover of the motor is located in the small-diameter shaft section, a rolling bearing is arranged in the small-diameter hole section of the rear end cover of the motor, an encoder is fixed at the bottom of the large-diameter hole, one end, connected with the rotor, of the lead screw penetrates through the rolling bearing on the rear end cover of the motor and then is connected with the encoder, an encoder cover is arranged outside the encoder.
Preferably, the two ends of the cylinder barrel are provided with openings, one end of the cylinder barrel is fixedly connected with the end face of the front end cover of the motor, the other end of the cylinder barrel is provided with an annular cylinder barrel end cover, and the piston rod penetrates through an inner hole of the cylinder barrel end cover and extends out of the cylinder barrel.
Preferably, the rear end cover of the motor and the encoder cover are both provided with wire passing holes.
The invention has the beneficial effects that:
1. the rotor is directly sleeved on the screw rod shaft, intermediate connecting pieces such as a motor, an output shaft and a coupler are omitted, transmission precision is improved, and zero length of the electric cylinder is shortened.
2. Set up the bearing room on the motor front end housing, directly assemble the antifriction bearing to the bearing room of motor front end housing, the cylinder is direct to pass through the screw connection with the motor front end housing, has abandoned motor mounting flange and bearing frame, has not only shortened electronic jar zero length, has also reduced manufacturing cost.
3. The motor rear end cap is designed to be of a sinking type structure, sinks towards one side of the motor, and the inner hole is provided with the rolling bearing, so that the screw rod is conveniently supported, and meanwhile, the zero length of the electric cylinder is effectively shortened.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic structural diagram of a rear end cover of the motor in the invention.
Fig. 3 is a schematic structural diagram of an encoder cover according to the present invention.
Detailed Description
Embodiments of the present invention are described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the structure of this embodiment includes a motor assembly and a cylinder assembly, the motor assembly includes a stator 7, a rotor 6, a motor housing 5, a motor front end cover 11 and a motor rear end cover 3, the cylinder assembly includes a cylinder 14, a piston rod 15, a lead screw 13 and a lead screw nut 12, the stator 7 is fixed in the motor shell 5, the rotor 6 is arranged in the stator 7, the center of the rotor 6 is provided with a through hole, the motor front end cover 11 and the motor rear end cover 3 are respectively connected with two ends of the motor shell 5, one end of the cylinder 14 is fixedly connected with the motor front end cover 11, the piston rod 15 is arranged in the cylinder 14, one end of the screw rod 13 is in interference fit with the central through hole of the rotor 6, the other end of the screw rod passes through the front end cover 11 of the motor and is inserted into the piston rod 15, the other end of the piston rod 15 extends out of the cylinder 14, the screw rod nut 12 is sleeved outside the screw rod 13, and the screw rod nut 12 is fixedly connected with the piston rod 15.
In this embodiment, 11 central authorities of motor front end housing are equipped with the ladder through-hole, and the big footpath hole of ladder through-hole is equipped with antifriction bearing 10 towards motor housing 5 one side in the big footpath downthehole, antifriction bearing 10 hole and lead screw 13 cooperation, antifriction bearing is equipped with bearing clamp plate 8 and lock nut 9 towards the terminal surface of motor housing 5 one side, lock nut 9 cover is established on lead screw 13.
In this embodiment, the outer disc of motor rear end cap 3 is stepped shaft structure, and the hole is the shoulder hole, the path shaft section of stepped shaft structure is located the motor casing, and the path hole section of 3 holes in the motor rear end cap is located the path shaft section, be equipped with antifriction bearing 4 in the 3 path hole sections in the motor rear end cap, big footpath hole bottom is fixed with encoder 1, the one end of being connected with rotor 6 on the lead screw 13 is passed behind antifriction bearing 4 on the motor rear end cap 3 and is connected with encoder 1, encoder cover 2 is equipped with to the 1 outside of encoder, encoder cover 2 is fixed at 3 terminal surfaces in the motor rear end cap.
In this embodiment, two ends of the cylinder 14 are open, one end of the cylinder is fixedly connected to the end face of the front end cover 11 of the motor, the other end of the cylinder is provided with an annular cylinder end cover 16, and the piston rod 15 passes through an inner hole of the cylinder end cover 16 and extends out of the cylinder 14.
In this embodiment, both the motor rear end cover 3 and the encoder cover are provided with wire passing holes 17.
In the above embodiment, when the rotor 6 rotates, the screw 13 connected with the rotor in an interference fit manner is driven to rotate together, and the screw nut 12 converts the rotation motion into a linear motion, so as to drive the piston rod 15 to perform a telescopic motion in the cylinder 14.
In the above embodiment, the technical means for shortening the zero length of the electric cylinder includes the following three aspects:
1. the rotor 6 is directly sleeved on the shaft 13 of the screw rod, intermediate connecting pieces such as a motor, an output shaft and a coupler are omitted, transmission precision is improved, and zero length of the electric cylinder is shortened.
2. Set up the bearing room on the motor front end housing 11, directly assemble motor front end housing 11's bearing room with antifriction bearing, cylinder 14 directly passes through the screw connection with motor front end housing 11, has abandoned motor mounting flange and bearing frame, has not only shortened electronic jar zero length, has also reduced manufacturing cost.
3. The motor rear end cover 3 is designed to be of a sinking type structure, sinks towards one side of the motor, is provided with a rolling bearing in an inner hole, is convenient for supporting a lead screw, and effectively shortens the zero length of the electric cylinder.
In the above embodiment, it should be noted that the lead screw 13 is of a stepped shaft structure, and the assembly of the lead screw with the motor rear end cover 3, the rotor 6 and the rolling bearing is positioned by a shaft shoulder.
The embodiment simplifies the design structure of the conventional electric cylinder, can improve the motion precision of the electric cylinder, reduce the production cost, is more suitable for application occasions with compact space, and can reduce the design cost of equipment and reduce the space of the motion envelope line of the equipment in the actual engineering design application.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides an electronic jar device of short zero length which characterized in that: including motor element and cylinder body subassembly, motor element includes stator, rotor, motor housing, motor front end housing and motor rear end cap, and the cylinder body subassembly includes cylinder, piston rod, lead screw, screw-nut, in the stator is fixed in motor housing, in the stator was located to the rotor, rotor central authorities were equipped with the through-hole, motor front end housing and motor rear end cap are connected with motor housing both ends respectively, cylinder one end and motor front end housing fixed connection, in the cylinder was located to the piston rod, lead screw one end and rotor central authorities through-hole interference fit, the other end passed the motor front end housing, insert to the piston rod in, the piston rod other end stretches out outside the cylinder, the screw-nut cover is established outside the lead screw, screw-nut and piston rod fixed connection.
2. The short zero-length electric cylinder device according to claim 1, characterized in that: the motor front end cover central authorities are equipped with the ladder through-hole, and the big footpath hole of ladder through-hole is equipped with antifriction bearing towards motor housing one side in the big footpath hole, the antifriction bearing hole cooperates with the lead screw, antifriction bearing is equipped with bearing clamp plate and lock nut towards the terminal surface of motor housing one side, the lock nut cover is established on the lead screw.
3. The short zero-length electric cylinder apparatus according to claim 2, characterized in that: the outer disc of motor rear end cover is stepped shaft structure, and the hole is the shoulder hole, the path shaft section of stepped shaft structure is located the motor casing, and the path hole section of motor rear end cover hole is located the path shaft section, be equipped with antifriction bearing in the path hole section of motor rear end cover, big footpath hole bottom is fixed with the encoder, the one end of being connected with the rotor on the lead screw is passed and is connected with the encoder behind the antifriction bearing on the motor rear end cover, the encoder cover is equipped with to the encoder outside, the encoder cover is fixed at motor rear end cover terminal surface.
4. The short zero-length electric cylinder device according to claim 3, characterized in that: the two ends of the cylinder barrel are opened, one end of the cylinder barrel is fixedly connected with the end face of the front end cover of the motor, the other end of the cylinder barrel is provided with an annular cylinder barrel end cover, and the piston rod penetrates through an inner hole of the cylinder barrel end cover and extends out of the cylinder barrel.
5. The short zero-length electric cylinder device according to claim 4, characterized in that: and wire passing holes are formed in the rear end cover of the motor and the encoder cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010613013.1A CN111786495A (en) | 2020-06-29 | 2020-06-29 | Short zero-length electric cylinder device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010613013.1A CN111786495A (en) | 2020-06-29 | 2020-06-29 | Short zero-length electric cylinder device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111786495A true CN111786495A (en) | 2020-10-16 |
Family
ID=72761269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010613013.1A Pending CN111786495A (en) | 2020-06-29 | 2020-06-29 | Short zero-length electric cylinder device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111786495A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113028014A (en) * | 2021-01-28 | 2021-06-25 | 穆特科技（武汉）股份有限公司 | Short zero-length gas-assisted electric cylinder device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101328964A (en) * | 2008-08-05 | 2008-12-24 | 沈阳飞机工业（集团）有限公司 | Rotation-stopping apparatus in servo cylinder |
| CN103199649A (en) * | 2013-02-18 | 2013-07-10 | 成都瑞迪机械实业有限公司 | Mechanical and electrical integration linear driving device |
| CN203548597U (en) * | 2013-09-27 | 2014-04-16 | 长飞光纤光缆股份有限公司 | Positioning and locking device of mobile screw rod support bearing |
| CN204030832U (en) * | 2014-06-19 | 2014-12-17 | 深圳市鸿栢科技实业有限公司 | A kind of planetary roller electric cylinder that is applied to hang integral type soldering turret |
| CN105914939A (en) * | 2016-05-31 | 2016-08-31 | 武汉穆特科技有限公司 | Novel electric cylinder structure |
| CN107336740A (en) * | 2017-06-22 | 2017-11-10 | 安徽德孚转向系统股份有限公司 | A kind of new automobile electric power-assisted steering apparatus worm bearing fixed structure |
| CN209881572U (en) * | 2019-05-23 | 2019-12-31 | 王瑞国 | Servo electric cylinder with compact structure |
| CN210431123U (en) * | 2019-08-05 | 2020-04-28 | 西安层峰机电设备有限公司 | Direct-drive electric sliding table |
-
2020
- 2020-06-29 CN CN202010613013.1A patent/CN111786495A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101328964A (en) * | 2008-08-05 | 2008-12-24 | 沈阳飞机工业（集团）有限公司 | Rotation-stopping apparatus in servo cylinder |
| CN103199649A (en) * | 2013-02-18 | 2013-07-10 | 成都瑞迪机械实业有限公司 | Mechanical and electrical integration linear driving device |
| CN203548597U (en) * | 2013-09-27 | 2014-04-16 | 长飞光纤光缆股份有限公司 | Positioning and locking device of mobile screw rod support bearing |
| CN204030832U (en) * | 2014-06-19 | 2014-12-17 | 深圳市鸿栢科技实业有限公司 | A kind of planetary roller electric cylinder that is applied to hang integral type soldering turret |
| CN105914939A (en) * | 2016-05-31 | 2016-08-31 | 武汉穆特科技有限公司 | Novel electric cylinder structure |
| CN107336740A (en) * | 2017-06-22 | 2017-11-10 | 安徽德孚转向系统股份有限公司 | A kind of new automobile electric power-assisted steering apparatus worm bearing fixed structure |
| CN209881572U (en) * | 2019-05-23 | 2019-12-31 | 王瑞国 | Servo electric cylinder with compact structure |
| CN210431123U (en) * | 2019-08-05 | 2020-04-28 | 西安层峰机电设备有限公司 | Direct-drive electric sliding table |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113028014A (en) * | 2021-01-28 | 2021-06-25 | 穆特科技（武汉）股份有限公司 | Short zero-length gas-assisted electric cylinder device |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201016 |
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| RJ01 | Rejection of invention patent application after publication |