JP2776064B2 - Brush wear detector of current collector for insulation trolley - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current collector brush wear detecting device for an insulating trolley.

[0002]

2. Description of the Related Art Some of the present inventors have previously proposed a brush wear detecting device for a current collector for an insulating trolley. (Japanese Patent Application No. 01-203553 (Japanese Unexamined Patent Application Publication No. 3-70401)) Such an apparatus is provided on a receiving member mounted on an insulating trolley from the side opposite to the brush insertion side, and disposed on the inner bottom surface of the receiving device. Band-shaped pressure-sensitive conductive sensor, and slidably disposed along the insertion direction of the current collector of the insulated trolley in the receiver, and the distance between the current collector brush holder and the pressure-sensitive conductive sensor is Also has a wear detection block that has been shortened by the brush's wear limit length, and a point-like projection is provided on the outer bottom surface of the wear detection block opposite to the contact portion with the brush holder. By pushing the band surface at a point, the operation with respect to the wear limit of the brush was achieved.

[0003]

As described above, assuming that the pressure-sensitive conductive sensor is pushed in with a point-like projection,
There is a fear that operates the pressure-sensitive conductive sensor in the vibration of the minute, such as sliding you pair insulator trolley brushes, also the hold down one point the pressure-sensitive conductive sensor prolonged deformation of the sensor (dents ), The degree of brush wear may not be accurately detected. In addition, if the clearance between the parts is too large due to subtle deviations in the dimensions of the wear detection block or the connection with the current collector or pressure-sensitive conductive sensor, even if the brush has actually reached the wear limit, Could not be detected, but there was no way to correct it.

The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide a device capable of performing a reliable operation and having excellent durability.

[0005]

Means for Solving the Problems] solutions be provided by the present invention has an inner bottom surface of the receptacle which is mounted from the opposite side, the receptacle has its brush insertion side insulating trolley
A strip-shaped pressure-sensitive conductive sensor disposed in a state of being positioned in the recess, and a collector brush holder, which is slidably arranged in the receiving trolley along the direction of insertion of the collector of the insulating trolley, and A wear detection block that is shorter than the distance between the pressure-sensitive conductive sensor and the brush by the wear limit length, and the pressure-sensitive conductive block is provided on the outer bottom surface of the wear detection block opposite to the contact portion with the brush holder. opposed crossed state to form a surface contactable jetty against belt surface of the sensor, the recess definitive the inner bottom surface of the receptacle to the jetty
An adjustment screw is provided so as to be able to appear and disappear in a state in which the pressure-sensitive conductive sensor is pushed from the back side.

[0006]

1 is a front elevational view showing an embodiment of a brush wear detecting device for a current collector for an insulating trolley according to the present invention. FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. FIG. 1
FIG.

The insulating trolley 3 is formed by covering the conductor 1 with an insulating cover 2 having a substantially U-shaped cross section, and a pair of legs of the insulating cover 2 from both sides of a sliding surface set on one side of the conductor 1. The shape is extended to form a restricted opening, from which the brush 8 of the current collector 5 is inserted.

[0008] The insulating trolley 3 is provided with a receiver 4 for a wear detecting device at an arbitrary position. The receiving member 4 is formed of a substantially U-shaped strip, and is attached so as to straddle the cut and separated portion of the insulating cover 2 of the insulating trolley. The receiving member 4 is provided on the side opposite to the sliding surface with respect to the exposed conductor. The inner bottom surface and the inner side surfaces are spaced from each other on both side surfaces.

The pressure-sensitive conductive sensor indicated by reference numeral 6 is arranged on the inner bottom surface of the receiving member 4 in a band shape. As such a sensor, a pressure-sensitive sensor made of pressurized conductive rubber is suitable. The main body of the sensor is a combination of silicon rubber and metal fine particles, and when pressure is applied, it is in an insulated state (Equation 1).
(0MΩ or more) to conductive state (several Ω or less), made of conductive rubber that shows a sudden change in resistance, sandwiched by a flat braided wire that serves as an electrode from both sides, and a silicone rubber sheath It is coded to cover the whole. The sensor is designed to operate (conduct) with a load (pressure) of several hundred mg.

A wear detecting block 9 of the wear detecting device is disposed as a core with respect to the receiving member 4 and has a substantially U-shaped basic shape. Is provided so as to be slidable along. The length of the wear detecting block 9 in the sliding direction is shorter than the distance between the shoulder surface of the brush holder 7 and the front side band surface of the pressure-sensitive conductive sensor 6 by about the wear limit length of the brush. The contact portion 11 formed with the brush holder 7 is formed in an arc shape having a large radius so that the brush holder 7 can be smoothly slid when the current collector 5 collects and runs. A portion of the outer bottom surface that contacts the pressure-sensitive conductive sensor 6 forms a jetty 10 that can make surface contact with the pressure-sensitive conductive sensor 6 in a state of intersecting with the belt surface.

The portions forming the walls on both sides of the receiving device 4 include:
A notch-shaped concave portion 4a is formed, into which an arm portion 9a protruding from a lower portion on both sides of the wear detecting block 9 enters.
A spiral spring 12 is linked between the bottom surface of the concave portion 4a and the arm portion 9a. The spring 12 does not buckle by penetrating the arm portion 9a and guiding it. The abrasion detection block 9 allows the jetty 10 to support the spring 12 with weight by supporting the spring 12 with weight.
I try not to push it on myself.

The bottom wall of the receiving member 4 is provided with a concave portion 4b for dropping and positioning the band-shaped pressure-sensitive conductive sensor 6 on the inner surface side, and an adjusting screw 13 is provided to reach the concave portion 4b from the outer surface side. Is screwed in. The adjusting screw 13 is adapted to be able to protrude and retract into the recess 4 b in a state facing the jetty 10 of the wear detecting block 9. Therefore, the position of the front surface is adjusted by pressing the back surface of the pressure-sensitive conductive sensor 6. Then, the clearance with the jetty 10 is corrected, and the operation start timing of the sensor can be accurately adjusted to the wear limit of the brush.

In the device configured as described above, if the current collector 5 urges the insulating trolley 3 with a spring, the current collector brush 8 is pressed against the sliding surface of the conductor 1 through the opening of the insulating cover 2. If the support base supporting the current collector 5 is connected to the moving device, the required current collecting traveling is performed together with the traveling of the moving device. The brush 8 wears as the brush 8 slides and wears in the course of repeating the current collecting travel, and when the wear is about to reach its limit, the brush holder 7 presses the one end portion 11 of the wear detecting block 9 and the wear detecting block 9 9 is pressed down while compressing the spring 12, and the surface of the jetty 10 on the outer bottom surface presses the surface side band surface of the pressure-sensitive conductive sensor 6, and the pressure-sensitive conductive sensor 6 to which pressure is applied operates (conduction). I do. If an appropriate detection circuit is provided on the sensor lead wire, the operation of the sensor can be detected and the wear limit of the brush can be detected.

[0014]

According to the current collector brush abrasion detecting device for an insulating trolley of the present invention configured as described above, the belt surface of the belt-shaped pressure-sensitive conductive sensor is formed on the surface of the jetty of the abrasion detecting block. Pressing, it is possible to reduce fatigue of the pressure-sensitive conductive sensor without receiving stress concentration at the local part.Also, it is possible to widen the surface pressure, so that small vibrations caused by brush sliding etc. A malfunction of the pressure-sensitive conductive sensor does not occur. Further, since the pressure-sensitive conductive sensor can be pushed by the adjusting screw from the back surface opposite to the surface on which the jetty presses, the operation start of the pressure-sensitive conductive sensor by the jetty can be adjusted arbitrarily. At this time, the pressure-sensitive conductive sensor
Even if the pressure-sensitive conductive sensor is pushed up by the adjustment screw,
Since it is positioned in the recess on the inner bottom surface of the fixture,
The displacement caused by the pressure-sensitive conductive sensor being pushed up.
To prevent malfunctions such as incorrect operation.
Can be. Therefore, the intended purpose of providing a reliable operation and excellent durability can be sufficiently achieved.

[Brief description of the drawings]

FIG. 1 is an explanatory front view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conductor 2 Insulating cover 3 Insulating trolley 4 Receiver 5 Current collector 6 Pressure-sensitive conductive sensor 7 Brush holder 8 Brush 9 Wear detection block 10 Jetty 13 Adjustment screw

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Toro Nagase 5-1-1, Hidaka-cho, Hitachi City, Ibaraki Prefecture Inside the Hidaka Factory, Hitachi Cable Co., Ltd. (56) References JP-A-3-70401 (JP, A) JP-A-2-290522 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B60L 5/00-5/42

Claims (1)

(57) [Claims] And 1. A receptacle mounted from the opposite side of its brush insertion side into the insulating trolley, Yusuke on the inner bottom surface of the receptacle
A band-shaped pressure-sensitive conductive sensor disposed in a state of being positioned in the concave portion, and a current collector brush holder that is slidably disposed in the receiving trolley along the direction of insertion of the current collector of the insulating trolley. A wear detection block that is shorter than the distance between the pressure-sensitive conductive sensor and the brush by a wear limit length, and the pressure-sensitive sensor is disposed on an outer bottom surface of the wear detection block opposite to a portion in contact with the brush holder. forming a surface contactable pier while crossing the strip surface of the conductive sensor, versus the recess definitive the inner bottom surface of the receptacle to the jetty
An abrasion detecting device for a current collector for an insulated trolley, comprising an adjusting screw provided so as to be able to appear and disappear in a state facing the pressure-sensitive conductive sensor from behind.