CN2708239Y

CN2708239Y - High protective grid type displacement sensor

Info

Publication number: CN2708239Y
Application number: CN 200420077329
Authority: CN
Inventors: 杨荣珍
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-07-21
Filing date: 2004-07-21
Publication date: 2005-07-06
Anticipated expiration: 2014-07-21

Abstract

The utility model discloses a high protective grid type displacement sensor manufactured with the raster or capacitive-grid philosophy and has the high protective abilities of anti liquid splashing and anti dust. The High protective grid type displacement sensor can effectively operate for a long time in hostile environments with oil and water splashing or dust flying. The high protective grid type displacement sensor is characterized in that through the long range dynamic overlaying to a narrow slot which penetrates the entire length of sectional materials and the triplex protecting to a protecting curtain, a thin belt and a rubber plastic skirt, the inner parts of the sectional materials can not be polluted. The high protective grid type displacement sensor has the advantages of simple structure, easy manufacturing and strong practicability.

Description

The high protective grid type displacement transducer

(1) technical field

The utility model relates to grid formula displacement transducer, is specially the anti-liquid splash of a kind of energy, prevents the high protective grid type displacement transducer that dust falls into.

(2) technical background

The grid formula displacement transducer made from grating or appearance grid principle is extensive use of in manufacturing industry, but at present the protective capacities at the grid formula displacement transducer of usefulness is very low, after the influence of extraneous contamination such as liquid body, dust material, precise decreasing, demonstration are forbidden, and the range of application and the environment for use of grid formula displacement transducer all are restricted.

Safeguard structure and defective thereof below with reference to the existing grid formula displacement transducer of Fig. 1～Fig. 3 brief description.

As shown in Figure 1, no matter grating displacement sensor or capacitive displacement transducer all are made up of long main scale 101 and short secondary chi 102, and secondary chi 102 is along the main scale 101 generation transducing signal that moves around.As shown in Figure 2, in order to make the influence of extraneous contamination materials such as few liquid body of transducing part and dust, grid formula displacement transducer is all packed sensing element in the hollow materials 103 isometric or slightly long with main scale 101, the two ends of section bar 103 length directions are airtight with member, three of its transversal section are airtight, have a narrow groove 104 that runs through section bar 103 total lengths on the remaining face, narrow groove 104 is section bar 103 inside and outside unique passages of linking up, the inside and outside part 106 of linking up is sent power supply into section bar 103 inside by this passage, and transducing signal is sent section bar 103 outsides.Deviser's problem to be solved is: should make secondary chi 102 along the inside and outside communication that the length direction of section bar 103 moves around and will keep electric signal, avoid pollution factors such as liquid spatters, dust to enter section bar 103 inside by narrow groove 104 again.So the deviser respectively installs a protection curtain 105 by the flexible rubber-plastic material on the both sides of narrow groove 104; article two, the edge of protection curtain 105 contacts with each other and forms closure; the formed opening of narrow groove is covered up; when inside and outside communication part 106 passes through; protection curtain 105 opens and allows it pass through, and relies on the nerve of rubber-plastics material closed immediately by the back.As if problem has obtained solution, but facts have proved that its defective is a durability not insufficient and can not be closed fully in length range.This is because on the one hand, the rubber-plastics material that exposes is easy deformation under oil pollution environment, and the distortion back much not closed place occurs in length range; On the other hand, rubber-plastics material will wear out under time effect, and the nerve that is the closed variation of aging back rubber-plastics material much not closed place also occurs in length range; Again on the one hand; as shown in Figure 3; when inside and outside communication part 106 passes through; protection curtain 105 open length are greater than the inside and outside physical length of linking up part 106; that is to say; protection curtain 105 exists sizable not closing phenomenon at inside and outside communication part 106 two ends, and this is owing to inside and outside communication part 106 has certain thickness reason to cause.After accumulating over a long period, the protection curtain 105 that is caused by the above-mentioned three aspect reasons not closing phenomenon polluter that enters section bar 103 inside is enough to influence sensing accuracy.

(3) utility model content

The purpose of this utility model is dynamically to cover by the long-range to the narrow groove that runs through the section bar total length; and triple protection of protection curtain, strip and rubber and plastic skirt; guarantee that section bar inside is not contaminated; make grid formula displacement transducer have that anti-liquid spatters, dirt-proof high protective capacities, the rugged surroundings that are operated in profit splash or dust from flying that can be permanently effective.

The purpose of this utility model is achieved in that it comprises long main scale and short secondary chi, and secondary chi can move back and forth the generation transducing signal along main scale.Main scale comprises the section bar of the hollow that sensing element is housed, and the two ends of section bar length direction are airtight with member, and three of its transversal section are airtight, has a narrow groove that runs through the section bar total length on the remaining face; A protection curtain of being made by flexible material is respectively installed on the both sides of narrow groove, and the edge of two protection curtains contacts with each other and forms closure, and the formed opening of narrow groove is covered up; Article two, when the protection curtain was in closure state, the most significant end at its closed place did not exceed exposing of narrow groove and shows the plane; Main scale also comprises a length greater than secondary chi shift motion, the width strip greater than narrow well width, and strip is positioned on the narrow groove of protection curtain top, will protect the curtain containing topped.Secondary chi comprises the support of hollow, the supporter that is arranged on support hollow inside, inside and outside communication part, rely on convergent force with support tightly wrap up in the rubber and plastic skirt that inside and outside communication part is contained in redoubling; The resilient shirt rim of rubber and plastic skirt is pressed on the surface of strip in advance, makes the inside of support hollow be isolated from the outside; Inside and outside communication part passes narrow groove and occupies between two protection curtains; the closure state of local failure protection curtain; install with sensing element in section bar inside; install with support in the section bar outside; to realize the same moved further of sensing element and support, power supply and transducing signal are sent into and are sent by inside and outside communication part and seal socket.Strip passes the support hollow interior space, its head and the tail two ends are packed in two ends of section bar length direction, do not pass the inside of support hollow and be exposed to outer strip and on narrow groove, keep exceptionally straight state to be adjacent to exposing of narrow groove showing the plane, and can dynamically rise and fall along with moving of secondary chi, thereby realize dynamically topped to the long-range of narrow groove, do not expose the table plane and the most significant ends at two closed places of protection curtain 202 exceed narrow groove, so protection curtain 202 also just has been subjected to the topped protection of strip 204; The strip that is hidden in support hollow inside leaves narrow groove and contains inside and outside guard space of linking up part by part of support formation of supporter.When secondary chi when main scale moves back and forth, support hollow inside also rises and falls mobile along with moving of secondary chi along main scale by strip and the formed guard space of supporter synchronously, and inside and outside communication part is inclusive in by in strip and the formed guard space of supporter, even so protection curtain open length greater than the physical length of inside and outside communication part, the not closing phenomenon that the protection curtain exists at inside and outside communication part two ends is also still among the containing at guard space; On the other hand, even the protection curtain is because aging or be out of shape and much not closed place occurs, but these not closed places are all by the topped protection of strip, and all are owing to the polluter that previous technological deficiency enters section bar inside all has been deposited on the strip; The rubber and plastic skirt makes the inside of support hollow be isolated from the outside, the polluter that the polluter that is deposited on the strip maybe may be entered from other channel or strike off or stop.Thereby the triple protection by protection curtain, strip and rubber and plastic skirt have guaranteed that section bar inside is not contaminated.

The utility model has the advantages that: 1. triple guard technologies has strengthened the protective capacities of prior art greatly, and is practical; 2. simple in structure, be easy to make; 3. be applicable to the grid formula displacement transducer that principles such as grating, appearance grid are made, have a large capacity and a wide range that adaptability is strong.

(4) description of drawings

Fig. 1 is the one-piece construction figure of traditional grating type displacement

Fig. 2 is the A-A cutaway view Amplified image of Fig. 1

Fig. 3 is the B-B cut-open view of Fig. 2

Fig. 4 is the one-piece construction figure of the utility model embodiment

Fig. 5 is the A-A cutaway view Amplified image of Fig. 4

(5) embodiment

Preferred embodiment of the present utility model such as Fig. 4～shown in Figure 6.As shown in Figure 4, it comprises long main scale 200 and short secondary chi 300, and secondary chi 300 can move back and forth the generation transducing signal along main scale 200 in the vertical direction of drawing paper; Main scale 200 comprises the section bar 201 of the hollow that sensing element 203 is housed, the two ends of section bar 201 length directions (being the vertical direction of drawing paper) are airtight with member, three of its transversal section are airtight, have a narrow groove that runs through total length on the remaining face, a protection curtain 202 of being made by flexible resilient material is respectively installed on the both sides of narrow groove, article two, the edge of protection curtain 202 contacts with each other and forms closed (not shown), the formed opening of narrow groove is covered up, when protection curtain 202 was in closure state, the most significant end at its place of contacting with each other, edge did not exceed exposing of narrow groove and shows the plane; Secondary chi 300 comprises that 301,4 on the support of hollow is arranged on the supporter 302 of support hollow inside, inside and outside communication part 303, relies on convergent force that support 301 redoubling of wrapping up in tightly is included in interior rubber and plastic skirt 304 with inside and outside communication part 303; Inside and outside communication part 303 passes narrow groove and occupies between two protection curtains 202, the closure state of local failure protection curtain 202, install with sensing element 203 in section bar 201 inside, install with support 301 in section bar 201 outsides, to realize the same moved further of sensing element 203 and support 301, power supply and transducing signal are sent into and are sent by inside and outside communication part 303 and seal socket 305; As shown in Figure 5, main scale 200 comprises that also a length is greater than secondary chi 300 shift motions, the width strip 204 greater than narrow well width, strip 204 is positioned on the narrow groove of protection curtain 202 (not shown)s top, its head and the tail two ends are packed in two terminal (not shown)s of section bar 201 length directions, strip 204 passes support 301 hollow interior space, in the inner space of support 301,, form a part and leave narrow groove and contain inside and outside guard space of linking up part 303 by the support of supporter 302; What the strip 204 that is exposed to support 301 outsides kept on narrow groove that exceptionally straight state is adjacent to narrow groove exposes the table plane, and rubber and plastic skirt 304 resilient shirt rims are pressed on the surface of the strip 204 that keeps exceptionally straight state in advance, make the inside of support 301 hollows be isolated from the outside; Being adjacent to the strip 204 that narrow groove exposes the table plane can dynamically rise and fall along with moving of secondary chi 300; thereby realize dynamically topped to the long-range of narrow groove; do not expose the table plane and the most significant ends at two closed places of protection curtain 202 exceed narrow groove, so protection curtain 202 also just has been subjected to the topped protection of strip 204.When secondary chi 300 when main scale 200 moves back and forth, because the head and the tail two ends of strip 204 install at two ends of section bar 201 length directions, length is immutable, so itself and supporter 302 formed guard spaces also will rise and fall mobile along main scale 200 along with moving of secondary chi 300 synchronously, and inside and outside communication part 303 is inclusive in this guard space, even so protect the physical length of curtain 202 open length greater than inside and outside communication part 303, the not closing phenomenon that protection curtain 202 exists at inside and outside communication part 303 two ends is also still among the containing of guard space is protected; On the other hand, even protection curtain 202 is owing to much not closed place appears in aging or distortion, but these not closed places all are adjacent to the strip 204 topped protections of narrow groove, and all are owing to the polluter that previous technological deficiency enters section bar 201 inside all has been deposited on the strip 204; Rubber and plastic skirt 304 makes the inside of support 301 hollows be isolated from the outside; the polluter that the polluter that is deposited on the strip 204 maybe may be entered from other channel or strike off or stop, thus guaranteed that by triple protection of protection curtain 202, strip 204 and rubber and plastic skirt 304 section bar 201 inside are not contaminated.

More than carried out implementation of the present utility model by preferred embodiment, but the utility model is not limited to above preferred embodiment, under the prerequisite that does not surmount the utility model characteristic range, the utility model can have various differentiation.

Claims

1. a high protective grid type displacement transducer is made up of main scale (200) and secondary chi (300), it is characterized in that:

Main scale (200) comprises hollow material (201), and the two ends of its length direction are airtight with member, and three of its transversal section are airtight, has a narrow groove that runs through total length on the remaining face; Also comprise strip (204), this strip is positioned at the top of described narrow groove, and length is greater than the shift motion of secondary chi (300), and width is greater than the width of described narrow groove, and the head and the tail two ends are packed in two ends of section bar (201) length direction;

Secondary chi (300) comprises the support (301) of hollow, the supporter (302) that is arranged on support (301) hollow inside, inside and outside communication part (303), relies on convergent force that inside and outside rubber and plastic skirt (304) of linking up part (303) is contained in support (301) redoubling of wrapping up in tightly;

Strip (204) passes the inside of support (301) hollow, by the support of supporter (302), forms a part and leaves described narrow groove and contain inside and outside guard space of linking up part (303);

The part that strip (204) does not leave described narrow groove keeps exceptionally straight state to be adjacent to described narrow groove;

The shirt rim of rubber and plastic skirt (304) is pressed on the surface of the strip (204) that is adjacent to described narrow groove in advance.

2. high protective grid type displacement transducer according to claim 1 is characterized in that:

A protection curtain (202) of being made by flexible resilient material is respectively installed on the both sides of the above narrow groove of hollow material (201); article two, the edge of protection curtain (202) contacts with each other the formation closure state; the most significant end at closed place does not exceed exposing of described narrow groove and shows the plane, and the described table plane of exposing is the surface of contact of strip (204) and hollow material (201).

3. high protective grid type displacement transducer according to claim 1 is characterized in that:

Main scale (200) comprises grating or holds the sensing element (203) of grid principle.

4. high protective grid type displacement transducer according to claim 1 is characterized in that:

Inside and outside communication part (303) passes described narrow groove and occupies between two protection curtains (202), and the closure state of local failure protection curtain 202 installs with sensing element (203) and support (301) respectively.