CN109687637A - A kind of linear actuator with position feedback function - Google Patents
A kind of linear actuator with position feedback function Download PDFInfo
- Publication number
- CN109687637A CN109687637A CN201811491112.6A CN201811491112A CN109687637A CN 109687637 A CN109687637 A CN 109687637A CN 201811491112 A CN201811491112 A CN 201811491112A CN 109687637 A CN109687637 A CN 109687637A
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- CN
- China
- Prior art keywords
- screw
- nut
- shell
- linear actuator
- linear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- H02K7/06—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
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Abstract
The invention belongs to actuator designing techniques, are related to a kind of linear actuator with position feedback function.In existing linear actuator, position feedback mostly uses greatly linear displacement transducer, by the way of direct-connected, linear actuator length is caused to increase, and volume increases, and weight increases.The present invention provides a kind of linear actuator with position feedback function, lead screw and feed screw nut are installed in shell, sliding bearing is mounted at shell nozzle, the lead screw has screw gear, it is also equipped with screw rod in the shell, there is the screw gear engaged with screw gear, disappear gap nut and the sensor nut of synchronous rotation are threaded on screw rod, there is compressed spring between the two, the extended structure of the sensor nut is connect with linear displacement transducer pull rod.By the way of Proportional Feedback, while accurate feedback actuator position, short and smallization, the lightweight of actuator are realized.
Description
Technical field
The invention belongs to actuator designing techniques, are related to a kind of linear actuator with position feedback function.
Background technique
Linear actuator has a wide range of applications in numerous areas.In existing linear actuator, position feedback is most
Using linear displacement transducer, such as LVDT, this kind of linear displacement transducer is using direct-connected mode, straight-line displacement sensing
Device pull rod is fixed on feed screw nut, and linear displacement transducer seat is installed in actuator shell, as shown in Figure 1.It is existing straight
Linear movement pick-up is all long, and the length after pull rod stretching is generally 2.5~3 times of measurement stroke.This result in order to
Linear displacement transducer is installed, so that linear actuator length increases, volume increases, and weight increases.
Summary of the invention
The object of the present invention is to provide a kind of linear actuators with position feedback function, it is using Proportional Feedback
Mode realizes short and smallization, the lightweight of actuator while accurate feedback actuator position.
A kind of linear actuator with position feedback function, is equipped with lead screw and feed screw nut, sliding axle in shell
It holds and is mounted at shell nozzle, the lead screw has screw gear, is also equipped with screw rod in the shell, has and lead screw tooth
The screw gear for taking turns engagement, disappear gap nut and the sensor nut of synchronous rotation are threaded on screw rod, is had between the two
There is compressed spring, the extended structure of the sensor nut is connect with linear displacement transducer pull rod.
The linear displacement transducer seat of the linear displacement transducer pull rod is mounted in shell.
In screw rod one end insertion bearing block, the other end is inserted into shell, and passes through bearing support in end.
The part that there is the sensor nut insertion to disappear in gap nut, the two are slidably connected.
The number of teeth of screw gear is Z1, and the number of teeth of screw gear is Z2, and the screw pitch of lead screw is M1, and the screw pitch of screw rod is M2,
When it is L that feed screw nut, which generates displacement, the displacement of linear displacement transducer pull rod is H, then:
The invention has the advantages that providing a kind of linear actuator with position feedback function, it uses Proportional Feedback
Mode substantially reduce the size of used linear displacement transducer while accurate feedback actuator position so that make
Dynamic this body length of device greatly shortens, and volume reduces, and short and smallization, the lightweight of actuator are realized in weight saving.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of prior art linear actuator.
Fig. 2 is the linear actuator structural schematic diagram that the present invention has position feedback function.
Fig. 3 is disappear gap nut and sensor nut scheme of installation.
Specific embodiment
The present invention is described in further details below.Referring to Fig. 1, a kind of straight line actuation with position feedback function
Device, it is by clamp nut 1, angular contact ball bearing 2, lead screw, screw gear 3, feed screw nut 4, sliding bearing 5, shell 6, straight line
Displacement sensor, the gap that disappears nut 11, compressed spring 10, sensor nut 9, screw rod 16, bearing 13, bearing block 14 and 15 groups of end cap
At.Lead screw is mounted on bearing block 14 with two angular contact ball bearings 2, and two angular contact ball bearings 2 use back-to-back installation
Mode, and compressed with clamp nut 1；4 nut portion of feed screw nut is mounted on lead screw, and outer circle is mounted on the hole of sliding bearing 5
Interior, formation is slidably matched.
Screw rod 16 is mounted on bearing block 14 by two bearings 13, one end, and one end is mounted on shell 6；It has with
The screw gear 12 that screw gear 3 engages.
In the threaded portion of screw rod 16, the gap nut 11 that disappears, compression compressed spring 10 and sensor nut 9 are installed；Disappear gap
Nut 11 is identical with the screw hole of sensor nut 9, and sensor nut 9, which is mounted on, to disappear in gap nut 11, convex on sensor nut 9
Decometer is in the slot for disappearing gap nut 11, prevent sensor nut 9 and disappearing gap nut 11 from mutually rotating；Compressed spring 10 is installed
Between sensor nut 9 and the gap nut 11 that disappears.
Linear displacement transducer is finished product, and linear displacement transducer pull rod 8 is mounted on the boss of sensor nut 9, directly
Linear movement pick-up seat 7 is mounted in shell 6.
The working principle of the invention is: when motor or other power source drive lead screws rotate, feed screw nut 4 is in lead screw
Under the action of move in a straight line.Screw gear 3 drives screw gear 12 simultaneously, transmits rotary movement on screw rod 16, screw rod
16 rotations, drive the component of disappear gap nut 11, compressed spring 10 and sensor nut 9 to move in a straight line, and sensor nut 9 drives
Linear displacement transducer pull rod 8 is stretched out or is retracted in linear displacement transducer seat 7, obtains position feedback.Compress compressed spring
10 are mounted on and disappear between gap nut 11 and sensor nut 9, make to disappear gap nut 11 and sensor nut 9 has axially spaced to become
Gesture achievees the purpose that the gap that disappears.
Assuming that the number of gear teeth on lead screw is Z1, the number of teeth of screw gear 12 is Z2, and the screw pitch of lead screw is M1, screw rod 16
Screw pitch is M2, and the displacement of feed screw nut 4 is L, and the displacement of linear displacement transducer pull rod 8 is H, then the position of feed screw nut 4
Relational expression between shifting amount L and the displacement amount H of linear displacement transducer pull rod 8 are as follows:
In the present embodiment, screw gear tooth number Z 1 is identical as the tooth number Z 2 of screw gear 12, and the screw pitch M1 of lead screw is 5, spiral shell
The screw pitch M2 of bar 16 is 0.5, then the displacement amount H of linear displacement transducer pull rod 8 is
The displacement amount H that can be seen that linear displacement transducer pull rod 8 from the embodiment is the displacement L of feed screw nut 4
1/10th, substantially reduce the length dimension of linear displacement transducer, correspondingly, but also the length dimension of actuator significantly
Reduce, reaches short and smallization, light-weighted purpose.
Claims (5)
1. a kind of linear actuator with position feedback function is equipped with lead screw (3) and feed screw nut (4) in shell (6),
Sliding bearing (5) is mounted on shell (6) opening, it is characterised in that: the lead screw has screw gear (3), in the shell (6)
Screw rod (16) are inside also equipped with, there is the screw gear (12) engaged with screw gear (3), be threadedly coupled on screw rod (16)
There are disappear gap nut (11) and the sensor nut (9) of synchronous rotation, there are compressed spring (10) between the two, the sensor spiral shell
The extended structure of female (9) is connect with linear displacement transducer pull rod (8).
2. linear actuator according to claim 1, it is characterised in that: the linear displacement transducer pull rod (8) it is straight
Linear movement pick-up seat (7) is mounted in shell (6).
3. linear actuator according to claim 1, it is characterised in that: bearing block (14) are inserted into described screw rod (16) one end
Interior, the other end is inserted into shell (6), and is supported in end by bearing (13).
4. linear actuator according to claim 1, it is characterised in that: the sensor nut (9), which has, is inserted into the gap that disappears
Part in nut (11), the two are slidably connected.
5. linear actuator described in any one of -4 according to claim 1, it is characterised in that: the number of teeth of screw gear (3) is
Z1, the number of teeth of screw gear (12) are Z2, and the screw pitch of lead screw is M1, and the screw pitch of screw rod (16) is M2, when feed screw nut (4) generate
When displacement is L, the displacement of linear displacement transducer pull rod (8) is H, then:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811491112.6A CN109687637B (en) | 2018-12-05 | 2018-12-05 | Linear actuator with position feedback function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811491112.6A CN109687637B (en) | 2018-12-05 | 2018-12-05 | Linear actuator with position feedback function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109687637A true CN109687637A (en) | 2019-04-26 |
| CN109687637B CN109687637B (en) | 2021-07-06 |
Family
ID=66187001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811491112.6A Active CN109687637B (en) | 2018-12-05 | 2018-12-05 | Linear actuator with position feedback function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109687637B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111106710A (en) * | 2019-12-11 | 2020-05-05 | 兰州飞行控制有限责任公司 | Electric steering engine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201354307Y (en) * | 2009-02-06 | 2009-12-02 | 南京建工集团有限公司 | Rotary displacement checking device |
| DE102005025748B4 (en) * | 2005-06-02 | 2011-07-28 | Andreas Grasl | Electricoline drive with limit stop |
| CN103673898A (en) * | 2013-12-11 | 2014-03-26 | 昆明理工大学 | Rotary fiber Bragg grating large displacement sensor based on gear and application method thereof |
| CN203871981U (en) * | 2014-05-14 | 2014-10-08 | 北京新兴东方航空装备股份有限公司 | Linear displacement type electric steering engine |
| CN206036160U (en) * | 2016-08-29 | 2017-03-22 | 常州市三协电机电器有限公司 | Screw thread interstitial structure is eliminated to lead screw motor |
-
2018
- 2018-12-05 CN CN201811491112.6A patent/CN109687637B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005025748B4 (en) * | 2005-06-02 | 2011-07-28 | Andreas Grasl | Electricoline drive with limit stop |
| CN201354307Y (en) * | 2009-02-06 | 2009-12-02 | 南京建工集团有限公司 | Rotary displacement checking device |
| CN103673898A (en) * | 2013-12-11 | 2014-03-26 | 昆明理工大学 | Rotary fiber Bragg grating large displacement sensor based on gear and application method thereof |
| CN203871981U (en) * | 2014-05-14 | 2014-10-08 | 北京新兴东方航空装备股份有限公司 | Linear displacement type electric steering engine |
| CN206036160U (en) * | 2016-08-29 | 2017-03-22 | 常州市三协电机电器有限公司 | Screw thread interstitial structure is eliminated to lead screw motor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111106710A (en) * | 2019-12-11 | 2020-05-05 | 兰州飞行控制有限责任公司 | Electric steering engine |
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| Publication number | Publication date |
|---|---|
| CN109687637B (en) | 2021-07-06 |
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