JPH05168101A - Current collector - Google Patents

Abstract

PURPOSE:To provide a downsized and stabilized current collector in which the current collector comprising a plurality of bundled conductive spring wire materials is secured, at one end, to an insulator and made slidable, at the other end, in a slot made in the insulator. CONSTITUTION:A plurality of conductive spring members, e.g. beryllium copper or phosphor bronze for spring, are bundled and bent to form an arched linear body 10. The linear body 10 is secured, at one end thereof, to one tubular wall 11a of an insulator 11 mounted on the roof of an electric vehicle by means of a solderless terminal and a screw 14 and then connected electrically with a lead wire 16 through a solderless terminal 15. The linear body 10 has the other end freely slidable in a slot 11b made in the other tubular wall 11c of the insulator 11. The linear body 10 slides, at the linear part thereof, on a stringing 12 thus collecting current. According to the invention, stabilized current collecting traveling can be realized through a downsized current collector having simple structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current collector, and more particularly to providing a current collector of this type suitable for a trolley wire having a transfer portion such as an insulated trolley wire.

[0002]

2. Description of the Related Art A device for collecting trolley wires, particularly insulated trolley wires, employs a collector for sliding, that is, a brush,
Conventionally, a brush made of a copper-based sintered alloy has been exclusively used. Such a solid brush had to be supported by an arm with a spring-loaded pressure mechanism.

FIG. 5 shows a typical example of a current collector for an insulated trolley wire. In a brush 1 made of a copper-based sintered alloy, a plastic holder which is mold-integrated with the brush 1 is compressed into a clevis 2. It is elastically held by being mounted via the spring 3. The clevis 2 is axially supported by inserting its own shaft portion into a cylindrical clevis receiver 4. The clevis receiver 4 is connected with a rivet or the like at one end of a parallel link type arm 5. The opposite end of the arm 5 is connected to a cylindrical bearing 7 with a rivet or the like, and the bearing 7 is inserted into a shaft 8 to support the arm so that the arm can swing. The tip of the arm 5 is pushed up by obliquely stretching the tension spring 6 between a pair of parallel arm portions, so that the brush 1 is pushed against the sliding surface of the trolley wire. 9
Is a base on which the shaft 8 is implanted and is attached to the mobile device.

[0004]

In the conventional current collector,
Even if the distance from the current collector mounting base changes, or if there is a step at the transfer part of the trolley wire, a long arm will be used so that the pressing of the brush will be uniform, and a spring will be added to it, making the structure complicated. The weight was also heavy.
Also, if the sliding surface of the trolley wire is slid with the above-mentioned copper-based sintered alloy brush, a large amount of abrasion powder is generated during the sliding process, and the surrounding area becomes dirty. It was necessary and involved a great deal of additional work. Moreover, it cannot be used in a clean room where dust is disliked.

By the way, some of the present inventors have already proposed a new current collector using a wire material of a conductive spring material having a certain wear resistance in order to solve the above problems. (Japanese Patent Application No. 3-266089) Such a current collector is beryllium copper (C1700, C172
0), phosphor bronze for spring (C5210), nickel silver for spring (C
7701) using a conductive spring material as a wire and bending it into an arc shape to fix one end to the terminal block, the other end to the free end, and the middle bow shape to the sliding part. It is a thing. According to the current collector, the wire itself serves as both a spring arm and a brush, so that a long arm is not required, which enables downsizing and simplification of the device, and the abrasion resistance of the spring material prevents generation of abrasion powder. It is possible to suppress.

As a result of various studies to put the current collector into practical use, it has been found that further improvement is required. That is, the wire rod is subjected to a bending action in a cantilever state, and the repulsive force due to elastic deformation at that time guarantees the pressing force against the trolley wire, but since the free end is literally free, the trolley wire is In the transfer section that is divided, the wire rod is temporarily separated from the trolley wire and the free end cannot receive any guidance.
If there is a noticeable step at the transfer part, the wire itself will behave in a complicated manner by the repulsive force of the elastic deformation of the free end of the wire. It turned out to be easy to fall into.

By solving the above-mentioned last point, the present invention makes it possible to simplify and downsize the device by using the wire material of the conductive spring material and to suppress the generation of abrasion powder due to sliding. Of course, it is an object of the present invention to provide a current collector of this type that enables stable traveling even if the wire is used.

[0008]

A current collector provided by the present invention comprises a plurality of wire rods made of a conductive spring material bundled into a linear molded body which is bent into a substantially bow shape, and one end thereof is fixed. It is fixed to the insulator as an end and the other end is slidably inserted into the slot provided in the insulator as a free end, and the middle bow-shaped portion is extended to the outside of the insulator to press the contact portion. It was formed.

The conductive spring material for the wire is beryllium copper (C1700, C1720), spring phosphor bronze (C).
5210) and one or more combinations selected from nickel silver for spring (C7701). These materials have predetermined spring characteristics and wear resistance due to being heat treated.

A means for binding is added to the fixed end of the linear molded body, and it is desirable to crimp and fix the crimp terminal as the means. In that case, the fixed end is fixed by screwing the crimp terminal to the insulator, and a predetermined electrical path can be established by screwing the lead wire terminal together with the crimp terminal.

[0011] The free end of the linear formed body should be suitable so that the inner diameter of the slot matches the outer diameter of the free end when the plurality of wire rod ends are simply inserted into the slot without bundling. By doing so, it is possible to smoothly slide in the slot without the end of the wire rod coming apart. Of course, the ends of the plurality of wire rods may be bound together.

According to the invention, preferred additional measures can be taken for such free ends. That is,
By crimping the caps at the ends of the wire rods at the free ends and inserting the caps as cores into the slots of the insulator, it is possible to prevent the insulators from being worn away by the wire ends, and the caps are made into insulators. By finishing to a size that fits inside the slot with a material that reduces friction with
The slide on the slot at the free end can be made smoother and more stable. In addition, by attaching a retaining pin to the cap as a skewer and sticking it out into an elongated hole provided so as to communicate with the slot of the insulator, it is possible to prevent unexpected jumping out of the slot at the free end. it can.

The solid end and the free end of the linear molded body are in a posture (position) parallel to each other, or in a posture (position) inclined so as to converge toward the middle bow-shaped portion.
It is desirable to be attached to the insulator with. It minimizes the load of bending stress received on the fixed end side during elastic deformation of the linear molded body itself when the intermediate bow-shaped portion protruding outward of the insulator is pressed against the sliding conductor, and , To prevent the free end from hitting strongly in the local area when the free end slides with respect to the slot and increasing the friction intensively, and causing the slide on the whole of the insertion part (slide part) to slide smoothly. Is.

[0014]

FIG. 1 shows a first embodiment of a current collector according to the present invention. (A) is an external view and (b) is a sectional view.

The linear molded body indicated by the reference numeral 10 is formed by bundling a plurality of wire rods having a circular cross section with a conductive spring material such as beryllium copper (C1770, C1720) and forming the whole into an arc shape. That is, the crimp terminal 13 is crimped and fixed at one of the ends 10a to bundle the wires together to form a fixed end. The other end 10b is a free end where the wire ends are gathered together in a bundle.

The insulator 11 is a molded body made of an insulating material such as engineering plastic, and is finished in a tubular shape as a whole. One of the opposing cylindrical walls 11a has a screw hole drilled from the inner wall surface, and the crimp terminal 13 applied to the inner wall surface is applied and tightened and fixed with a screw 14 to achieve a predetermined fixation. The crimp terminal 15 of the lead wire 16 is superposed on the crimp terminal 13, and the terminals are electrically connected to each other by tightening the screw 14. A cylindrical slot 11b is bored in the other of the opposing cylindrical walls, and the free end 10b of the linear molded body 10 is slidably inserted therein.

In the linear molded body 10 in which the fixed end and the free end are assembled as described above, the middle bow-shaped portion is the insulator 1.
1 is projected outward, and a predetermined pressing contact portion is set, so that the sliding surface 12 of the slid conductor is urged and contacted.

The terminal fixing surface of one cylinder wall 11a of the insulator 11 and the surface of the slot 11b of the other cylinder wall extend in a direction perpendicular to the sliding surface 12 of the slid conductor and their mutual surfaces are formed. Positioned to be parallel. Then, the fixed end 10a and the free end 10b of the linear molded body 10 are bent and formed such that they are parallel to each other with the middle bow-shaped portion being pressed against the sliding surface 12 of the conductor to be slid (state in the figure). It has been done.
By doing so, the free end 10b can be slid most easily in the slot 11b in the use state in which the free end 10b is pressed against the sliding conductor. In addition, the bending stress applied to the fixed end 10a is prevented from becoming large.

According to the current collector of this embodiment having the above-mentioned structure, the intermediate bow-shaped portion of the linear molded body 10 is pressed against the sliding surface 12 of the slid conductor, and the elastic force is applied to the wire rod of the molded body itself. By running the vehicle in a deformed state, it is possible to slide while maintaining the pressing force. Then, when the current collector tries to pass through the transfer part due to the gap of the conductor, if there is a significant step in the transfer part, the free end 10b slides in the slot 11b according to the step, Elastic deformation or elastic return of the wire itself occurs concomitantly, so that it is possible to transfer and run while absorbing the step. At that time, the free end 10b is constantly guided in the slot 11b, so that the free end 10b does not jump and jump due to the step, and it is possible to transfer with stable behavior.

2A and 2B show a second embodiment of a current collector according to the present invention. FIG. 2A is a sectional view and FIG. 2B is a side view. The same structural and functional parts as those in the first embodiment described above are designated by the same reference numerals.

In this embodiment, the free end side is improved. That is, at the free end of the linear molded body, the cap 17 for collectively gripping the ends of the wire material is fixed.

The cap 17 is a cylindrical molded body made of engineering plastic or the like having excellent wear resistance or a cylindrical body made of metal, and is covered so as to cover the outer periphery of the end of the wire rod and fixed by an adhesive or caulking. It Therefore, the cap 17 is set to have a final outer diameter slightly smaller than the inner diameter of the insulator slot 11b so that the cap 17 can slide in the slot. By sliding with the cap in this way, there is no concern of damaging the inner surface of the slot with the wire material, and more stable sliding is possible.

Further, the cap 17 has a retaining pin 1
8 is attached as a skewer, and correspondingly to this, an elongated hole 11c communicating with the slot 11b in the insulator 11
Are formed. When the cap 17 is in the state of being inserted in the slot 11b, the retaining pin 18 is projected into the elongated hole 11c. By doing so, the retaining pin 18 moves in the elongated hole 11c along with the sliding of the cap 17, and if the current collector is removed from the slid conductor for maintenance, the elasticity of the wire rod is reduced. When the cap 17 tries to forcefully come out of the slot 11b due to the return, the retaining pin 18 is locked in the elongated hole 11c and its movement is restricted, so that the free end is prevented from protruding.

FIG. 3 shows a third embodiment of the current collector according to the present invention, in which the assembling postures of the fixed end and the free end are modified. That is, the crimp terminal fixing surface on one cylinder wall 11a of the insulator 11 and the slot 11b on the other cylinder wall.
Surface of the linear molded body 10 are inclined so as to converge toward the conductor to be slid, and the fixed end 10a (the crimp terminal 13) of the linear molded body 10 and the free end 10b have an intermediate bow-shaped portion. They are inclined with respect to each other so as to converge toward the bow-shaped portion in the state of being pressed against the sliding surface 12 of the conductor to be slid (state in the figure). By doing so, the free end 10b can be slidably slid in the slot 11b in a use state in which the free end 10b is pressed against the sliding conductor, and further, the bending of the wire rod itself, which is the skeleton of the linear molded body, is further moderated. As a result, the bending stress at the time of elastic deformation can be further reduced, and the sliding of the free end 10b with respect to the slot 11b can be made smoother. Also, by gently bending the wire rod, the pressing contact area of the intermediate bow-shaped portion can be increased.

In the embodiments of FIGS. 1 and 3, the free wire ends are shown as bundled, but as shown in FIG.
Alternatively, the wire rods may be integrated at the end faces by a connecting means 19 such as brazing. In that case, it is advisable to perform processing so that the connecting means 19 does not become larger than the wire-converging outer diameter.

[0026]

According to the current collector of the present invention as described above, the linear shaped body which is formed by bundling the wire rods of the conductive spring material and bending it into an arc shape is provided with an arm and a brush. Since it is used for collecting current to the moving conductor, the initial purpose of enabling simplification and downsizing of the device and suppressing the generation of abrasion powder is not only sufficiently achieved, but also the free end of the conductive spring material is insulated. Since it is slidably inserted in the slot of the body, when the intermediate bow-shaped part between the fixed end and the free end is pressed against the sliding surface of the conductor to be slid to elastically deform the linear molded body itself, the free end is It slides in the slot to absorb the elastic deformation and is always guided into the slot. Therefore, when the current collector tries to pass through the transfer section due to the gap of the conductor, it is noticeable in the transfer section. If there is a step May be a free end in response to the step slides within the slot, the elastic deformation or the elastic return of the wire itself is concomitantly occurs, travels Noriutsuri while absorbing the difference in level with. At that time, the free end is constantly guided in the slot, so that it does not jump and jump due to the step, and it is possible to transfer with stable behavior, and thus the wire of the conductive spring material is The intended purpose of providing a current collector of this kind which still allows stable running when used in a cantilevered manner is achieved.

[Brief description of drawings]

FIG. 1 shows a first embodiment of a current collector of the present invention, (a) is a front view and (b) is a cross-sectional view.

FIG. 2 shows a second embodiment of a current collector of the present invention, (a) is a sectional view and (b) is a side view.

FIG. 3 is a sectional view showing a third embodiment of the current collector of the present invention.

FIG. 4 is a perspective view showing a modified example of the free end of the linear molded body used in the current collector of the present invention.

FIG. 5 is a front view showing an example of a conventional trolley wire current collector.

[Explanation of symbols]

 10 Wire Formed Body 10a Fixed End 10b Free End 11 Insulator 11a One Tube Wall (Crimping Terminal Attachment Side) 11b Slot 11c Slot 12 Sliding Conductor Sliding Surface 13 Crimp Terminal (Fixed End Side) 14 Screw 15 Crimp terminal (lead wire side) 16 Lead wire 17 Cap 18 Locking pin 19 Coupling means (free end side)

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hirofumi Okubo 5-1-1 Hidaka-cho, Hitachi-shi, Ibaraki Hitachi Cable Co., Ltd. Hidaka Plant

Claims (4)

[Claims] 1. A plurality of wire rods made of a conductive spring material are bundled to form a linear molded body which is bent in a generally bow shape, and one end thereof is fixed to an insulator while the other end is fixed. A current collector characterized in that it is slidably inserted into a slot provided in the insulator as a free end, and an intermediate bow-shaped portion is projected outward of the insulator to form a pressing contact portion. 2. A crimp terminal is attached to a fixed end of the linear molded body, and the fixed end is fixed by screwing the crimp terminal to a wall surface of an insulator. Electronic. 3. A cap for holding a plurality of wires at a time and a retaining pin are attached to a free end of the linear molded body, and the cap is slidably provided in a slot of the insulator, and the cap is detached. The current collector according to claim 1, wherein the retaining pin projects into an elongated hole provided in communication with the slot of the insulator. 4. The current collector according to claim 1, wherein the fixed end and the free end are attached to the insulator in a posture parallel to each other or inclined so as to converge with each other in the direction of the middle bow-shaped portion. ..