CN106524889A - Pull rod linear displacement sensor - Google Patents
Pull rod linear displacement sensor Download PDFInfo
- Publication number
- CN106524889A CN106524889A CN201610920661.5A CN201610920661A CN106524889A CN 106524889 A CN106524889 A CN 106524889A CN 201610920661 A CN201610920661 A CN 201610920661A CN 106524889 A CN106524889 A CN 106524889A
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- CN
- China
- Prior art keywords
- shell
- pull bar
- pull rod
- resistor disc
- rod
- 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.)
- Pending
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Adjustable Resistors (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The present invention relates to a pull rod linear displacement sensor. The sensor comprises housing, a pull rod connected with a measured object, a resistor disc installed in the housing and a sliding block electric brush assembly movably matching the resistor disc to change the resistance value. The housing is provided with an end cover, the pull rod passes through the end cover to fixedly connect with the sliding block electric brush assembly, a linear bearing sleeved on the pull rod is installed near the inner end surface of the end cover, and a V-shaped or U-shaped rubber ring is installed between the inner end surface of the end cover and the linear bearing. The linear bearing and the rubber ring form a support guiding assembly sealingly matching the pull rod, and the linear bearing and the rubber ring are matched to solve the problem that water or dust is attached onto the pull rod to enter the product when the pull rod is pulled. The external sealing structure is better, the interior of the product is not easy to be influenced by the factors of the dust, the noise, the vibration and the moisture of the environment, and the pull rod linear displacement sensor is very suitable for the application in various industrial machineries and medical devices.
Description
Technical field
The present invention relates to displacement transducer field, is specifically related to a kind of rod-pulling type linear displacement transducer.
Background technology
Displacement transducer field is widely used in woodworking machinery, injection machine special-purpose machinery, Packing Machine special-purpose machinery, printer
Tool, armarium apparatus, robot location's control, engineering monitoring computer control movable machinery system etc. need accurately measurement displacement
Occasion.Linear displacement transducer is, based on slide rheostat principle, the displacement of machinery to be converted into the signal of telecommunication.Slip variable resistance
Device is displacement by slide plate on slide rail changing the size of resistance, slide rheostat two ends connection DC voltage, it is allowed to logical
Less microamperes of current is crossed, the length that the voltage between slide plate and initiating terminal is moved to slide plate is directly proportional.So based on so
Principle, the anti-electro permanent magnetic of linear displacement transducer is very high.Existing rod-pulling type displacement transducer product structure includes shell, pull bar
And positioned at the sliding shoe brush assembly of electric and resistor disc of the inside the shell, during work：The pull bar is connected with object being measured,
When object being measured is moved, pull bar drives the sliding shoe brush assembly of electric to move on resistor disc so as to cause resistor disc moving
The change of the resistance value on dynamic direction, the resistance value of change is then exported by electrical equipment and to be converted into final displacement signal defeated
Go out.The defect of the structure is：Due to the sealing effectiveness between pull bar and shell it is not good enough, so interiors of products easily be subject to environment
The impact of the factors such as dust, noise, vibration, humidity and directly result in the unstability of measurement result.
The content of the invention
For solving above-mentioned technical problem, the invention provides a kind of rod-pulling type linear displacement transducer, straight-line displacement biography
Sensor has good sealing structure, and interiors of products is not easily susceptible to the impact of the factors such as ambient dust, noise, vibration, humidity, non-
Often it is adapted to used in various industrial machineries and armarium.
For achieving the above object, present invention employs technical scheme below：
A kind of rod-pulling type linear displacement transducer, including shell and object being measured connection pull bar and be arranged on institute
State the resistor disc in shell and coordinate the sliding shoe brush assembly of electric to change resistance value with resistor disc movement, on the shell
End cap is provided with, the pull bar is fixedly connected with the sliding shoe brush assembly of electric through end cap, is installed near the end cap inner face
There is the linear bearing being enclosed within the pull bar, between the end cap inner face and linear bearing, be also equipped with V-arrangement or U-shaped rubber
Circle.
Further, it is arranged on the linear bearing and is fixed with copper sheathing, the copper sheathing outer peripheral face is provided with flange collar, described convex
Circle side is the fixed pressure ring being set on the copper sheathing, and the flange collar opposite side is to be set on the copper sheathing and all with end cap
The O-ring seal for coordinating is sealed to medial surface, is extended at the sealing surface of shell and end cap on the outside of the fixed pressure ring, it is described
While the fixed pressure ring is fixed when end cap is fixed on shell.
Further, described pull bar one end is provided with the mounting rod for installing the sliding shoe brush assembly of electric, the installation
Bar is coaxial with pull bar and the diameter of the mounting rod is less than the diameter of pull bar, is provided between the pull bar and sliding shoe brush assembly of electric
The spring being enclosed within the mounting rod, the spring one end act on the tie rod end, and the spring other end acts on institute
State on sliding shoe brush assembly of electric.
Further, the sliding shoe brush assembly of electric includes floating type slip cap and the electricity swiped on the resistor disc
Brush, the inside the shell are provided with guide groove, and the sliding shoe brush assembly of electric is by slip cap sliding in the guide groove.
Further, it is provided with the shell and the resistance value of change is exported into electrically connecting into voltage or current module
Connected components, the electric connection component include the contact flat spring being electrically connected with the resistor disc, and the contact flat spring is fixed
Elastic returning direction is pointed to the resistor disc to realize the close contact of contact flat spring and resistor disc afterwards.
Further, the voltage or current module it is built-in in the housing and with the signal output part installed on shell
Component is electrically connected.
Further, the contact flat spring is bending, the resistor disc and the contact flat spring lateral surface bending place bullet
Property contact.
It is preferred that, the linear bearing is oil-free linear bearing, and the rubber ring is fluorine rubber ring.
The beneficial effect of above-mentioned technical proposal is mainly reflected in the following aspects：
(1) heretofore described linear bearing, rubber ring constitute the support guide component coordinated with tie-rod sealing, described straight
Bobbin is honoured the axial direction pulling of pull bar and plays guide effect, it is ensured that the change in displacement of pull bar is with the resistance change of resistor disc in just
Than relation, the linear bearing solves pull bar water or dust when pulling with rubber ring cooperation and is attached on pull bar into product
Internal problem.More preferably, interiors of products is not easily susceptible to ambient dust, noise, vibration, humidity to outer seal structure i.e. of the invention
Etc. the impact of factor, used in being highly suitable for various industrial machineries and armarium.
(2) heretofore described linear bearing carries out installation fixation by copper sheathing, fixed pressure ring, prevents which in the axial direction
Displacement.It is concrete first linear bearing to be arranged on pull bar, then copper sheathing is arranged on linear bearing when installing, when gland it is solid
When being scheduled on shell, the fixed pressure ring is fixedly clamped by the sealing surface between the gland and shell, is easily installed and is installed
It is reliable and stable afterwards.The sealing ring further ensures the sealing effectiveness at end cap, equivalent to secondary seal, can prevent outer completely
The water or dust on boundary is attached on pull bar and enters interiors of products, and the precision to improving displacement measurement of the present invention has important work
With.
(3) heretofore described spring causes pull bar to constitute elastic buffer connected mode with sliding shoe brush assembly of electric, eliminates
There is nonlinear movement when pull bar is pulled and the impact to resistance value signal stabilization, improve the measurement essence of the present invention
Degree.
(4) heretofore described slip cap is a movable part, if guide groove uneven surface, slip cap meeting in shell during slip
Automatic Levelling, makes more multiaspect contact with shell guide groove, so as to reduce abrasion；Slip cap is relative with shell guide groove when sliding, and has
Microvibration, because slip cap is movable, can completely cut off vibration, it is to avoid vibration effect is to brush, so that the signal of output is more steady
It is fixed；When sliding shoe brush assembly of electric is big with shell guide groove gap, slip cap is changed, slide block cost is much lower compared to changing.
Brush is also increased in addition with flatness during resistor disc relative motion so as to increase the stability and life of product of signal.
(5) electric connection component of the present invention is capable of achieving the electrical connection with resistor disc by contact flat spring, abandons
Traditional electric connection component and resistor disc by way of tin cream welding is realized being connected, present invention optimizes the assembling side of product
Formula, simple structure, production cost is saved.
(6) in addition the present invention by it is the voltage or current module built-in in the housing, in product when solving use
Outside also needs to install the problem of voltage or current conversion module, the signal output part component on shell coordinate built-in voltage or
Current module causes signal output to settle at one go, using more convenient.
(7) the oil-free linear bearing is a kind of novel lubrication for having metal bearing feature and Nonlubricated bearing feature concurrently
Bearing, bears load by metallic matrix, and the solid lubricant of special formulation plays lubrication, with raising inventive energy
Effect.
Description of the drawings
Fig. 1 is end view of the present invention.
A-A sectional views of the Fig. 2 for Fig. 1.
A portion enlarged drawings of the Fig. 3 for Fig. 2.
B portion enlarged drawings of the Fig. 4 for Fig. 2.
Fig. 5 is the C portions enlarged drawing of Fig. 2.
B-B sectional views of the Fig. 6 for Fig. 2.
D portion enlarged drawings of the Fig. 7 for Fig. 6.
In figure, the implication of label symbol is as follows：
1- shell 2- pull bar 2a- mounting rod 2b- spring 3- resistor discs
4- sliding shoe brush assembly of electric 4a- slide block 4b- slip cap 4c- brushes
5- end cap 6- linear bearing 7- rubber ring 8- copper sheathing 8a- flange collar 9- fixed pressure rings
10- sealing ring 11- guide groove 12- voltages or current module 13- electric connection components
13a- contact flat spring 14- signal output part components
Specific embodiment
In conjunction with the construction featuress of the description of the drawings present invention：
The present invention include tubular shell 1, and object being measured connection pull bar 2 and in the shell 1
Resistor disc 3 and sliding shoe brush assembly of electric 4 to change resistance value, the shell is coordinated to be provided with end with the movement of resistor disc 3
Lid 5, the pull bar 2 are fixedly connected through end cap 5 with the sliding shoe brush assembly of electric 4, are provided near 5 inner face of the end cap
The linear bearing 6 being enclosed within the pull bar 2, is also equipped with V-arrangement or U-shaped rubber between 5 inner face of the end cap and linear bearing 6
Circle 7.Heretofore described linear bearing 6, rubber ring 7 are constituted and are sealed the support guide component for coordinating, the linear axis with pull bar 2
Guide effect is played in the axial direction pulling for holding 6 pairs of pull bars 2, it is ensured that the change in displacement of pull bar 2 is with the resistance change of resistor disc 3 in just
Than relation, the linear bearing 6 solves pull bar 2 water or dust when pulling with the cooperation of rubber ring 7 and is attached on pull bar 2 and enters
The problem of interiors of products.Outer seal structure i.e. of the invention more preferably, interiors of products be not easily susceptible to ambient dust, noise, vibration,
The impact of the factors such as humidity, used in being highly suitable for various industrial machineries and armarium.
It is arranged on the linear bearing 6 and is fixed with copper sheathing 8,8 outer peripheral face of the copper sheathing is provided with flange collar 8a, flange collar 8a
Side is the fixed pressure ring 9 being set on the copper sheathing 8, the flange collar 8a opposite side for be set on the copper sheathing 8 and with end
The O-ring seal 10 that the circumferential inner side face seal of lid 5 coordinates, it is close with end cap 5 that the outside of the fixed pressure ring 9 extends to shell 1
At front cover, while the fixed pressure ring 9 is fixed when the end cap 5 is fixed on shell 1.Heretofore described linear axis
Holding 6 carries out installation fixation by copper sheathing 8, fixed pressure ring 9, prevents its displacement in the axial direction.During concrete installation, first by linear axis
Hold 6 to be arranged on pull bar 2, then copper sheathing 8 is arranged on linear bearing 6, when gland 5 is fixed on shell 1, the gland
The fixed pressure ring 9 is fixedly clamped by the sealing surface between 5 and shell 1, reliable and stable after being easily installed and installing.The sealing
Circle 10 further ensures the sealing effectiveness at end cap 5, equivalent to secondary seal, can prevent the water or dust attachment in the external world completely
Interiors of products is entered on pull bar 2, and the precision to improving displacement measurement of the present invention has important effect.
2 one end of the pull bar is provided with the mounting rod 2a for installing the sliding shoe brush assembly of electric 4, the mounting rod 2a with
Pull bar 2 is coaxial and the diameter of the mounting rod 2a is less than the diameter of pull bar 2, sets between the pull bar 2 and sliding shoe brush assembly of electric 4
There is the spring 2b being enclosed within the mounting rod 2a, described spring 2b one end acts on 2 end of the pull bar, and the spring 2b is another
End is acted on the sliding shoe brush assembly of electric 4.Heretofore described spring 2b causes pull bar 2 and 4 structure of sliding shoe brush assembly of electric
Into elastic buffer connected mode, eliminate when pull bar 2 is pulled and nonlinear movement and the shadow to resistance value signal stabilization occur
Ring, improve the certainty of measurement of the present invention.
The sliding shoe brush assembly of electric 4 includes the floating type slip cap 4b and brush 4c swiped on the resistor disc 3,
Guide groove 11 is provided with the shell 1, the sliding shoe brush assembly of electric 4 is by slip cap 4b slidings in the guide groove 11.
Heretofore described slip cap 4b is the movable part with certain elasticity, if 11 uneven surface of guide groove in shell 1 during slip, sliding
Dynamic set 4b meeting Automatic Levellings, make more multiaspect contact with shell guide groove 11, so as to reduce abrasion；Slip cap 4b and 11 phase of shell guide groove
During to sliding, microvibration is had, because slip cap 4b is movable, vibration can be completely cut off, it is to avoid vibration effect to brush 4c, so as to
Make the signal of output more stable, that is, brush 4c is increased with flatness during 3 relative motion of resistor disc so as to increase the steady of signal
Qualitative and life of product；When sliding shoe brush assembly of electric 4 is big with 11 gap of shell guide groove, slip cap 4b is changed, compared to more
Change slide block 4a costs much lower.
It is provided with the shell 1 and exports the electric connection component into voltage or current module 12 by the resistance value of change
13, the electric connection component 13 includes the contact flat spring 13a being electrically connected with the resistor disc 3, the contact flat spring 13a
After fixation, elastic returning direction is pointed to the resistor disc 3 to realize the close contact of contact flat spring 13a and resistor disc 3.It is described to connect
Tactile shell fragment 13a is bending, the resistor disc 3 and contact flat spring 13a lateral surface bending place Elastic Contact.It is of the present invention
Electric connection component 13 is capable of achieving the electrical connection with resistor disc 3 by contact flat spring 13a, has abandoned traditional electrical connection group
Part 13 and resistor disc 3 by way of tin cream welding is realized being connected, present invention optimizes the assembling mode of product, simple structure,
Production cost is saved.
During the voltage or current module 12 are built in the shell 1 and with the signal output part component installed on shell 1
14 electrical connections.In addition the present invention is built in the voltage or current module 12 in the shell 1, in product when solving use
Outside also needs to install the problem of voltage or current conversion module, and the signal output part component 14 on shell 1 coordinates built-in electricity
Pressure or current module 12 cause signal output to settle at one go, using more convenient.
Claims (8)
1. a kind of rod-pulling type linear displacement transducer, including shell (1), and object being measured connection pull bar (2) and install
Resistor disc (3) in the shell (1) and coordinate the sliding shoe brush group to change resistance value with resistor disc (3) movement
Part (4), it is characterised in that：The shell is provided with end cap (5), and described pull bar (2) pass through end cap (5) and the sliding shoe brush
Component (4) is fixedly connected, and is provided with the linear bearing (6) being enclosed within the pull bar (2), institute near the end cap (5) inner face
State and between end cap (5) inner face and linear bearing (6), be also equipped with V-arrangement or U-shaped rubber ring (7).
2. rod-pulling type linear displacement transducer as claimed in claim 1, it is characterised in that：It is arranged on linear bearing (6)
Copper sheathing (8) is fixed with, copper sheathing (8) outer peripheral face is provided with flange collar (8a), and flange collar (8a) side is to be set in the copper
Fixed pressure ring (9) on set (8), flange collar (8a) opposite side are to be set on the copper sheathing (8) and inside with end cap (5) week
The O-ring seal (10) that side sealing coordinates, extends to the sealing of shell (1) and end cap (5) on the outside of fixed pressure ring (9)
At face, while the fixed pressure ring (9) is fixed when end cap (5) are fixed on shell (1).
3. rod-pulling type linear displacement transducer as claimed in claim 1, it is characterised in that：Pull bar (2) one end is provided with use
In the mounting rod (2a) for installing sliding shoe brush assembly of electric (4), mounting rod (2a) coaxial with pull bar (2) and the installation
Diameter of the diameter of bar (2a) less than pull bar (2), is provided between pull bar (2) and sliding shoe brush assembly of electric (4) described in being enclosed within
Spring (2b) on mounting rod (2a), spring (2b) one end act on the pull bar (2) end, and spring (2b) is another
End is acted on sliding shoe brush assembly of electric (4).
4. rod-pulling type linear displacement transducer as claimed in claim 1, it is characterised in that：Sliding shoe brush assembly of electric (4)
Guide groove is provided with the brush (4c) swiped including floating type slip cap (4b) and on the resistor disc (3), shell (1)
(11), sliding shoe brush assembly of electric (4) are by the slip cap (4b) sliding in the guide groove (11).
5. rod-pulling type linear displacement transducer as claimed in claim 1, it is characterised in that：Be provided with shell (1) by
The resistance value of change exports the electric connection component (13) into voltage or current module (12), electric connection component (13)
Including the contact flat spring (13a) being electrically connected with the resistor disc (3), elastic returning after contact flat spring (13a) is fixed
Point to resistor disc (3) to realize the close contact of contact flat spring (13a) and resistor disc (3) in direction.
6. rod-pulling type linear displacement transducer as claimed in claim 5, it is characterised in that：The voltage or current module (12)
Electrically connect in being built in the shell (1) and with the signal output part component (14) installed on shell (1).
7. rod-pulling type linear displacement transducer as claimed in claim 5, it is characterised in that：Contact flat spring (13a) is curved
Folding shape, resistor disc (3) and the contact flat spring (13a) lateral surface bending place Elastic Contact.
8. the rod-pulling type linear displacement transducer as described in any one of claim 1-7, it is characterised in that：The linear bearing
(6) it is oil-free linear bearing, described rubber ring (7) are fluorine rubber ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610920661.5A CN106524889A (en) | 2016-10-21 | 2016-10-21 | Pull rod linear displacement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610920661.5A CN106524889A (en) | 2016-10-21 | 2016-10-21 | Pull rod linear displacement sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106524889A true CN106524889A (en) | 2017-03-22 |
Family
ID=58291757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610920661.5A Pending CN106524889A (en) | 2016-10-21 | 2016-10-21 | Pull rod linear displacement sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106524889A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218882A (en) * | 2017-06-09 | 2017-09-29 | 武汉纺织大学 | A kind of elastic ring length-measuring appliance |
| CN107869950A (en) * | 2017-12-20 | 2018-04-03 | 南阳淅减汽车减振器有限公司 | A kind of damper piston pole length automatic detection device |
| CN108426589A (en) * | 2018-05-04 | 2018-08-21 | 深圳市昌龙盛机电技术有限公司 | A kind of anti-vibration pull rod sensor |
| CN109141177A (en) * | 2018-10-09 | 2019-01-04 | 华北电力大学（保定） | A kind of displacement sensor for digital output modul |
| CN111174764A (en) * | 2020-01-22 | 2020-05-19 | 福建天泉教育科技有限公司 | Single-camera translation system and single-camera distance measurement method |
| CN114018146A (en) * | 2021-12-24 | 2022-02-08 | 四川永星电子有限公司 | Duplex sealed linear displacement sensor |
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| CN201348494Y (en) * | 2009-01-23 | 2009-11-18 | 上海沃巴弗电子科技有限公司 | Straight-line displacement sensor |
| CN201466875U (en) * | 2009-04-02 | 2010-05-12 | 中国航天科技集团公司烽火机械厂 | electromechanical actuator |
| CN102900728A (en) * | 2012-09-29 | 2013-01-30 | 中国重型机械研究院股份公司 | External displacement sensor |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218882A (en) * | 2017-06-09 | 2017-09-29 | 武汉纺织大学 | A kind of elastic ring length-measuring appliance |
| CN107869950A (en) * | 2017-12-20 | 2018-04-03 | 南阳淅减汽车减振器有限公司 | A kind of damper piston pole length automatic detection device |
| CN107869950B (en) * | 2017-12-20 | 2023-11-21 | 南阳淅减汽车减振器有限公司 | Automatic detection device for length of piston rod of shock absorber |
| CN108426589A (en) * | 2018-05-04 | 2018-08-21 | 深圳市昌龙盛机电技术有限公司 | A kind of anti-vibration pull rod sensor |
| CN109141177A (en) * | 2018-10-09 | 2019-01-04 | 华北电力大学（保定） | A kind of displacement sensor for digital output modul |
| CN111174764A (en) * | 2020-01-22 | 2020-05-19 | 福建天泉教育科技有限公司 | Single-camera translation system and single-camera distance measurement method |
| CN114018146A (en) * | 2021-12-24 | 2022-02-08 | 四川永星电子有限公司 | Duplex sealed linear displacement sensor |
| CN114018146B (en) * | 2021-12-24 | 2022-04-12 | 四川永星电子有限公司 | Duplex sealed linear displacement sensor |
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Application publication date: 20170322 |
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