CN217845067U

CN217845067U - Redundant output stay cord displacement sensor

Info

Publication number: CN217845067U
Application number: CN202222221796.6U
Authority: CN
Inventors: 杨俊营
Original assignee: Beijing Tebeifu Electronic Technology Co ltd
Current assignee: Beijing Tebeifu Electronic Technology Co ltd
Priority date: 2022-08-23
Filing date: 2022-08-23
Publication date: 2022-11-18
Anticipated expiration: 2032-08-23

Abstract

The utility model discloses a redundant output stay cord displacement sensor relates to sensor technical field, including axis, driving gear and circuit board, driving gear cover locates the axis and both rotate in step outside and, the circuit board includes sensing circuit and the potentiometre of being connected with the sensing circuit electricity, and the potentiometre is equipped with driven gear, driven gear and driving gear engagement transmission, and the circuit board includes two way independent sensing circuit and two potentiometers, and two potentiometers one-to-one ground are connected with two way sensing circuit electricity, and the driven gear of two potentiometers all transmits with driving gear engagement. By adopting a redundancy design, two paths of sensing circuits are arranged on the circuit board and are mutually independent, when one path of sensing circuit fails, the other path of sensing circuit is not influenced, and the sensing circuit which does not fail can still output measurement data; the safety and the reliability of the operation of the equipment are improved, and the method is suitable for the application field with higher requirement on the reliability.

Description

Redundant output stay cord displacement sensor

Technical Field

The utility model relates to a sensor technical field, concretely relates to redundant output stay cord displacement sensor.

Background

The pull rope displacement sensor is also called as a pull rope sensor, a pull rope electronic ruler and a pull rope encoder, fully combines the advantages of an angle sensor and a linear displacement sensor, can replace a grating ruler, and realizes low-cost high-precision measurement.

The existing pull rope sensor has the following defects: 1. usually there is only one output, if the circuit fails, the whole product will not be usable; 2. when the pull wire is broken, the steel wire rope is often clamped and locked at circumferential gaps among the reel, the coil spring bin and the side cover of the wire outlet bin, the steel wire rope cannot be completely withdrawn, and at the moment, the circuit still outputs a certain numerical value, so that a control system receives error information, and serious engineering accidents are possibly caused; 3. the steel wire rope is used for a long time and lacks lubrication; when the steel wire rope is retracted, dust is sometimes carried; the service life of the steel wire rope is influenced in time; 4. when the pull rope is used for a long time in some environments (such as outdoors), the space where the pull rope is located is infiltrated with water and cannot be discharged in time.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a redundant output stay cord displacement sensor to solve foretell one or more technical problem.

In order to achieve the above object, the present invention provides the following technical solutions:

a redundant output pull rope displacement sensor comprises a center shaft, a driving gear and a circuit board, wherein the driving gear is sleeved outside the center shaft and synchronously rotates with the center shaft, the circuit board comprises a sensing circuit and potentiometers electrically connected with the sensing circuit, the circuit board comprises two independent paths of sensing circuits and two potentiometers, the two potentiometers are electrically connected with the two paths of sensing circuits in a one-to-one correspondence mode, a driven gear is arranged on an input shaft of each potentiometer, and the driven gears of the two potentiometers are in meshing transmission with the driving gear.

Further, the wire winding device comprises a wire winding wheel, a coil spring bin and a wire outlet bin side cover, wherein the wire winding wheel is sleeved outside the middle shaft and synchronously rotates with the middle shaft, a steel wire rope is wound on the wire winding wheel, the coil spring bin and the wire outlet bin side cover are located on two sides of the wire winding wheel, and circumferential gaps between the wire winding wheel and the coil spring bin and between the wire outlet bin side cover and the wire winding wheel are smaller than the diameter of the steel wire rope.

Furthermore, one end of the middle shaft penetrates into the coil spring bin, the middle shaft and the coil spring bin are rotatably connected through a bearing, and the middle shaft and the coil spring bin are sealed through an oil seal; an elastic pin shaft penetrates through the joint of the reel and the central shaft to circumferentially position the reel, and a check ring is arranged on the axial edge of the central shaft, which is positioned on the reel, to axially position the reel; the other end of the middle shaft penetrates through the outlet bin side cover, the middle shaft is rotatably connected with the outlet bin side cover through a bearing, and the middle shaft and the outlet bin side cover are sealed through an oil seal.

Further, the device also comprises a guide rod base, a threaded guide rod and oil-immersed absorbent cotton; the guide rod base and the threaded guide rod are provided with center holes; one end of the guide rod base is fixed on the shell, and the other end of the guide rod base is provided with an external thread; one end of the thread guide rod is provided with an inner cavity and an internal thread; the threaded guide rod is fixed with the guide rod base through threads, and the oil-impregnated absorbent cotton is limited in the inner cavity; the steel wire rope passes through the central hole and the inner cavity.

Further, the device also comprises an upper end cover of the guide rod, a copper ring, an aluminum sleeve and a rubber buffer pad; the upper end cover of the guide rod is provided with a central hole, and the upper end cover of the guide rod is detachably fixed at the other end of the threaded guide rod; the free end of the steel wire rope is wound around the copper ring, is parallel to the rope body of the steel wire rope and is fixed through the compacted aluminum sleeve; the rubber buffer cushion is sleeved outside the steel wire rope, and the rubber buffer cushion is positioned between the upper end cover of the guide rod and the copper ring.

Furthermore, the casing is provided with a plurality of water drainage holes, and the water drainage holes are distributed on the casing corresponding to the peripheral side of the reel.

The utility model has the advantages of as follows:

by adopting a redundancy design, two sensing circuits are arranged on the circuit board, are independent and are respectively connected with a potentiometer, and the potentiometers are driven by the same central shaft (driven gears are driven by a driving gear), so that the data measured by the two sensing circuits are the same; one path of measurement and output is added, when one path of sensing circuit fails, the other path of sensing circuit is not affected, and the sensing circuit which does not fail can still output measurement data; the safety and the reliability of the operation of the equipment are improved, and the method is suitable for the application field with higher requirement on the reliability.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the range which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.

Fig. 1 is a schematic structural diagram (front view) of a redundant output pull rope displacement sensor according to an embodiment of the present invention;

FIG. 2 isbase:Sub>A cross-sectional view A-A of FIG. 1;

FIG. 3 is a cross-sectional view B-B of FIG. 2;

FIG. 4 is a cross-sectional view of C-C of FIG. 1;

FIG. 5 is a cross-sectional view taken along line D-D of FIG. 2;

fig. 6 is a perspective view of a redundant output pull rope displacement sensor according to an embodiment of the present invention.

In the figure: 1, mounting a seat plate; 2-a gasket; 3-a coil spring shaft sleeve; 4-oil sealing; 5-a reel; 6-elastic pin shaft; 7-outlet bin side cover; 8-hexagonal copper cylinder; 9-a circuit board; 10-middle axis; 11-a retainer ring; 12-a coil spring; 13-a drive gear; 14-a driven gear; 15-steel wire rope; 16-a guide bar base; 17-a threaded guide rod; 18-oil-soaked absorbent cotton; 19-guide rod upper end cover; 20-rubber cushion pad; 21-an aluminum sleeve; 22-a housing; 23-a copper ring; 24-coil spring magazine; 25-a weep hole; 26-potentiometer.

Detailed Description

The present invention is described in detail with reference to the specific embodiments, and other advantages and effects of the present invention will be apparent to those skilled in the art from the disclosure herein. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are also considered to be the scope of the present invention without substantial changes in the technical content.

The embodiment provides a redundant output pull rope displacement sensor, which is also called a double-way pull rope displacement sensor and is an improvement on the existing pull rope displacement sensor; the method can accurately measure the displacement data and provide two paths of redundant outputs; under the condition of wire breakage, the steel wire rope cannot be clamped, and the wire rope can still return to zero; the steel wire rope is lubricated when being pulled out, and can remove dust when being retracted, so that the service life of the steel wire rope is prolonged; the casing is equipped with the outlet, can be with the water discharge in the casing.

As shown in fig. 1 to 6, the redundant output cord displacement sensor will be described with the mounting base plate being "down" to define an "up and down" orientation.

The installation seat plate 1 is a rectangular plate, the shell 22 is a cubic hollow shell with an open lower end, the open end of the shell 22 is fixed with the installation seat plate 1, and the formed inner space is used for installing other parts.

The internal space is provided with a gasket 2, a coil spring bin 24, a reel 5, a wire outlet bin side cover 7 and a circuit board 9 from bottom to top in sequence. The inner space is also provided with a vertical middle shaft 10, the lower end of the middle shaft 10 is inserted into the coil spring bin 24, and the upper end of the middle shaft passes through the reel 5 and the outlet bin side cover 7 and is close to the circuit board 9. The coil spring chamber 24 is internally provided with a coil spring 12, the inner ring of the coil spring is fixed with the central shaft 10 through the coil spring shaft sleeve 3, and the outer ring of the coil spring 12 is fixed with the coil spring chamber 24 through a circular groove to provide restoring force for the central shaft 10. The middle shaft 10 and the coil spring bin 24 are fixed through a bearing and sealed through an oil seal 4; the middle shaft 10 and the outlet bin side cover 7 are fixed through a bearing and sealed through an oil seal 4; thus, water entering the space of the reel 5 does not enter the space of the coil spring 12 and the circuit board 9, the protection level is improved, and short circuit or corrosion caused by water entering is avoided. The reel 5 is sleeved on the center shaft 10, the elastic pin shaft 6 is inserted into the joint part perpendicular to the axis direction of the center shaft 10, so that the reel 5 and the center shaft 10 are fixed, the reel 5 and the center shaft 10 rotate synchronously, the center shaft 10 is further provided with a retaining ring 11, and the retaining ring 11 is positioned above the reel 5 and limits the reel 5 to move upwards. The wire rope 15 is wound around the reel 5, four drain holes 25 are opened around the case 22 corresponding to the periphery of the reel 5, and water entering the space where the reel 5 is located can be discharged. The circuit board 9 is fixed with the outlet bin side cover 7 through a hexagonal copper column 8; the circuit board 9 is provided with a sensing circuit, and the sensing circuit is connected with a potentiometer 26, wherein the sensing circuit, the potentiometer 26 and the connection relationship between the sensing circuit and the potentiometer are the prior art. A driving gear 13 is fixed at the upper end of the center shaft 10, the potentiometer 26 is provided with an input shaft, a driven gear 14 is installed on the input shaft, the driving gear 13 is meshed with the driven gear 14, when a rope is pulled, the steel wire rope 15 drives the reel 5 to rotate, the reel 5 drives the center shaft 10 to rotate, the center shaft 10 drives the driving gear 13 to rotate, the driving gear 13 drives the driven gear 14 to rotate, after the potentiometer 26 rotates, the resistance value changes, the sensing circuit collects the resistance value change and conducts linearization processing, data are output to the data collection box, and displacement measurement is completed.

In the prior art, large gaps exist between the rim of the reel 5 and the upper side edge of the coil spring bin 24 and between the rim and the lower side edge of the outlet bin side cover 7 in the axial direction, and the steel wire rope 15 risks being clamped in the gaps when the wire is broken; once jammed, the bottom bracket 10 cannot be reset under the action of the coil spring 12, and the zero resetting cannot be realized. In the embodiment, the gap is reduced to be smaller than the diameter of the steel wire rope 15, so that the steel wire rope 15 which is not controlled or jumped in the wire breaking process is prevented from falling into the gap and being blocked.

In this embodiment, the circuit board 9 is a redundant circuit board 9, that is, two paths of sensing circuits which operate independently are arranged on the circuit board 9; the two sensing circuits are respectively and electrically connected with one potentiometer 26, namely the potentiometers 26 are also two; the driven gears 14 of both potentiometers 26 are meshed with the driving gear 13. The two independent sensing circuits, the power supply, the signal and the like are mutually independent, one of the two independent sensing circuits is damaged without influencing the normal operation of the other independent sensing circuit, so that the two independent sensing circuits are subjected to redundant design and redundant output, the two independent sensing circuits can be simultaneously output, backup is carried out when equipment is damaged, and the safety and the reliability of the operation of the equipment can be improved.

In the prior art, the free end of the steel wire rope 15 penetrates out of the side part of the shell 22, passes through the copper ring 23 and then extends into the aluminum sleeve 21 sleeved on the rope body of the steel wire rope 15, the free end of the steel wire rope 15 can be fixed with the rope body after the aluminum sleeve 21 is compacted, and meanwhile, the steel wire rope 15 and the copper ring 23 are fixed. In this embodiment, a wire guide rod base with a central hole is provided at a position where the wire rope 15 passes through the housing 22, and an external thread is provided at an end of the guide rod base 16. A thread guide rod 17 with a central hole is screwed and fixed at the external thread of the guide rod base 16, the near end of the thread guide rod 17 is provided with internal threads, and the diameter of the central hole of the near end is enlarged to form an inner cavity. Oil-soaked absorbent cotton 18 is plugged into the inner cavity, the steel wire rope 15 penetrates out of the guide rod base 16 and then is wrapped with the oil-soaked absorbent cotton 18, then penetrates out of the threaded guide rod 17, and then the threaded guide rod 17 and the guide rod base 16 are screwed, so that the steel wire rope 15 can be lubricated each time the steel wire rope is pulled out; after a period of use, the screw guide rod 17 can be unscrewed and replaced with new oil-soaked absorbent cotton 18. A guide rod upper end cover 19 with a central hole is detachably fixed at the outer end of the thread guide rod 17, and dust brought back during winding is blocked in a space formed by the guide rod upper end cover 19 and the thread guide rod 17 so as to be cleaned regularly. The steel wire rope 15 is further sleeved with a rubber buffer cushion 20, the rubber buffer cushion 20 is located between the upper end cover 19 of the guide rod and the copper ring 23, when the equipment pulls the copper ring 23 to operate, if the copper ring 23 is separated from the equipment, the steel wire rope 15 can suddenly rebound, impact force can cause the steel wire rope 15 to break, and the rubber buffer cushion 20 can effectively reduce the impact force and avoid the steel wire rope 15 from breaking; the rubber buffer 20 can be a rubber tube, and the thickness (the moving direction of the steel wire rope 15 is the thickness direction) is thicker, so that the buffer effect is better.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of this invention without departing from the spirit thereof.

Claims

1. The utility model provides a redundant output stay cord displacement sensor, includes axis, driving gear and circuit board, the driving gear cover is located outside the axis and both synchronous rotations, the circuit board include sensing circuit and with the potentiometre that sensing circuit electricity is connected, its characterized in that:

the circuit board comprises two independent sensing circuits and two potentiometers;

the two potentiometers are electrically connected with the two sensing circuits in a one-to-one correspondence manner;

and the input shaft of the potentiometer is provided with driven gears, and the driven gears of the two potentiometers are in meshing transmission with the driving gear.

2. The redundant output pull rope displacement sensor according to claim 1, further comprising a reel, a coil spring bin and a wire outlet bin side cover, wherein the reel is sleeved outside the center shaft and rotates synchronously with the center shaft, a steel wire rope is wound on the reel, the coil spring bin and the wire outlet bin side cover are located on two sides of the reel, and circumferential clearances among the reel, the coil spring bin and the wire outlet bin side cover are smaller than diameters of the steel wire rope.

3. The redundant output pull rope displacement sensor according to claim 2, wherein one end of the central shaft penetrates into the coil spring chamber, the central shaft and the coil spring chamber are rotatably connected through a bearing, and the central shaft and the coil spring chamber are sealed through an oil seal; an elastic pin shaft penetrates through the joint of the reel and the central shaft to circumferentially position the reel, and a check ring is arranged on the axial edge of the central shaft, which is positioned on the reel, to axially position the reel; the other end of the middle shaft penetrates through the outlet bin side cover, the middle shaft is rotatably connected with the outlet bin side cover through a bearing, and the middle shaft and the outlet bin side cover are sealed through an oil seal.

4. The redundant output pull-cord displacement sensor according to claim 2, further comprising a guide bar base, a threaded guide bar, and oil-impregnated absorbent cotton; the guide rod base and the threaded guide rod are provided with central holes; one end of the guide rod base is fixed on the shell, and the other end of the guide rod base is provided with an external thread; one end of the thread guide rod is provided with an inner cavity and an internal thread; the threaded guide rod is fixed with the guide rod base through threads, and the oil-impregnated absorbent cotton is limited in the inner cavity; the steel wire rope passes through the central hole and the inner cavity.

5. The redundant output pull cord displacement sensor of claim 4 further comprising a guide rod upper end cap, a copper ring, an aluminum sleeve, and a rubber cushion; the upper end cover of the guide rod is provided with a central hole, and the upper end cover of the guide rod is detachably fixed at the other end of the threaded guide rod; the free end of the steel wire rope is wound around the copper ring, is parallel to the rope body of the steel wire rope and is fixed through the compacted aluminum sleeve; the rubber buffer cushion is sleeved outside the steel wire rope, and the rubber buffer cushion is positioned between the upper end cover of the guide rod and the copper ring.

6. The redundant output cord displacement sensor according to claim 4, wherein the housing is provided with a plurality of drain holes, and the plurality of drain holes are distributed in the housing corresponding to the peripheral side of the reel.