JPS5970102A - Rail current collector - Google Patents

Abstract

PURPOSE:To prevent the dancing phenomenon of a current collecting shoe by extending the arm of the shoe from the shaft supporting position at the side opposite to a power supply rail and providing a balance weight at the extension. CONSTITUTION:A current collecting shoe 3 is supported to a rotatiolnal shaft 2 in its arm 3a, and elevationally rotatably supported to a frame 1 through the shaft 2. The arm 3a of the shoe 3 is extended at the side opposite to a power supply rail 10 from its shaft supporting position, and a rear frame 15a having a heavy weight is provided as a balance weight at the rear of the extension 15. The conditions that a stopper contact 13 is separated from a downward movement limiting stopper 11 when the frame 1 moves downwadely due to the acceleration alpha2 is M1(alpha2-g)L1>Fl+M2(alpha2-g)L2, where M1 is the weight of the shoe 3, M2 is the weight of the weight 15a, and F is the pressing force of a pressing spring 9. Accordingly, the dancing phenomenon of the shoe can be prevented even on the rail laid on the ground foundation having improper smoothness accuracy.

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to a rail current collector.

[Technical background of the invention]

For example, in subways, it is difficult to install overhead wires on the tunnel ceiling due to the cross-sectional area of the tunnel, and on large railways or special railways that do not want large-scale aerial overhead wires, it is difficult to install overhead wires along the tracks on which vehicles run. A third rail for power supply is laid, and current is collected by a rail current collector installed on the vehicle.

Fig. 1 shows a conventionally used rail current collector. In the figure, 1 is a current collector frame, and a rotating shaft 2 is provided horizontally at the lower end of this frame I. 3 is provided so that the base end of the arm portion 3a is supported by the rotating shaft 2 and is movable up and down. This current collector is constructed by attaching the frame 1 to the seat 5 fixed to the side surface of the insulator 4 supported between the front and rear axle boxes (not shown) under the floor of the vehicle body. λ section 38 is installed under the floor of the car body so as to be oriented in a direction perpendicular to the longitudinal direction (running direction) of the car body.The chamber 5 and the frame I are fitted with serrations formed on their joint surfaces. At the same time, there is a hole 8 which is screwed into the hole 1 which protrudes from the seat 5 and passes through the vertical nostril provided in the frame I.
The tightening is fixed, and the installation height of the current collector can be adjusted by loosening the nut 8 and releasing the engagement of the serrations. Further, the arm portion 3a of the current collector wire 3 is pressed downward by a presser spring 9, which is a torsion spring fitted to the rotating shaft 2 and attached to the frame I. Due to the elasticity of the grounding section, it is pressed against the upper surface of the power supply rail 10 with an appropriate pressing force, and the vertical movement of the vehicle body is controlled by the earth section. a0) d so as to slide on the rail lo while absorbing the movement above h. On the other hand, in the rail current collector, since the current collector wire 3 is pressed against the upper surface of the rail 10 as described above, the current collector wire 3 may sneak under the rail 1o when approaching the end of the rail 10, and When the vibration of a running vehicle is severe, the moment of inertia of the current collector wire 9, which moves up and down, becomes greater than the pressing force of the spring 9, causing the current collector wire 3 to jump up from the upper surface of the rail 10, causing the current collector wire to 3 may come into contact with the ground and the structure.Therefore, in the above-mentioned rail current collector, there is a lower limit stopper 11 on the frame l that restricts the lower limit of the current collector line 3, and a riser that restricts the upper limit of the upper limit of the current collector line 3. A limiting stopper 12 is provided, and two stopper abutting portions Z, ?, Z4 provided on the arm portion 3a of the current collecting wire 3 on both sides of the rotating shaft 2 (base end side) The stopper abutting part 13 is stopped by the lowering limit stopper 11 to prevent the current collecting wire 3 from slipping under the rail 10, and the other stopper abutting part 14 is connected to the lowering limiter stopper 1.
2, the receiver is stopped to prevent the current collector line 3 from coming into contact with ground structures.

[Problems with background technology]

However, in the above-mentioned conventional rail current collector, since the current collecting wire 3 is supported by the rotating shaft 2 at the base end of the arm portion 3a, the center of gravity of the current collecting wire 3 is 70 degrees around the center of rotation (the rotating shaft 2 ) is far away from 9. This caused the following problems. That is, on a well-used track where the current collection line 3 moves up and down, the vibration of the car body is small, and therefore the vibration acceleration applied to the current collection line 3 is also small, so there is not much of a problem. On tracks where the smoothness of the rails cannot be achieved very well, the vehicle body vibrates violently while running, and the current collector line 3 receives a large vibration acceleration and is strongly excited. If they are far apart, the moment of inertia of the current collector wire 3 will overcome the pressing force of the spring 9, and the current collector wire 3 will move toward the rail 10.
This causes a dancing phenomenon in which the particles jump up from the surface.

The vibration acceleration that causes this dancing phenomenon of the current collecting wire 3 can be considered as follows. FIG. 2 is a mechanical model diagram of the current collector shown in FIG. The part pressing indicates the distance between the position and the center of rotation of the current collector wire 3, and is M.

represents the weight of the current collector wire 3, and F represents the pressing force of the pressing spring 9. Now, if the current collector line 3 is not in contact with the rail 1-5...
At this time, the current collector wire, ? i'" - presser foot! f - is pushed downward by the pressing force of the spring 9 and descends to the lowering limit 12, and the stopper abutting portion 13 is pressed against the lowering limit stopper 11 by the pressing force of the presser spring 9. Then, if frame 1 descends in this state, the acceleration 1 of frame 1 at this time is M, (α1, /l) Ll≦
If the value is Fl, the descent limiting stopper 11 and the stopper abutting portion 13 remain in contact, but M
l(α.

-11) When the frame I is rapidly descending with an acceleration α such that L, > pl, the contact part I3 separates from the downward limit stop buckle 11 and the current collector line 3 will start dancing on their own. This is the same even if the frame 1 suddenly descends while the current collector wire 3 is sliding on the rail surface, so the vibration acceleration α of the frame 1 that causes the dance phenomenon in which the current collector wire 3 jumps up from the rail surface is , the limit is Ml(α+,!i')L+=FA, Fl 0. α'MIL++b''・・・・・・・・・・・・・・・
・・・・・・・・・・・・(1) is considered to be the case.

Therefore, in the conventional current collector mentioned above, the car body current collector 3 starts to move, but since this acceleration is a fairly small value, the current collection performance 3 easily starts to move on the track due to the smoothness accuracy of the roadbed. The stopper 11.
12 and stopper contact portion 1, ? , Z 4 and the force violently collide with each other, producing a large impact sound. , l 4
The contact surface with the rail 10 will wear out or deform early, and furthermore, the arc generated when the current collector 3 comes into contact with and separates from the rail 10 will melt and damage the current collector 3 and the rail 10. There was a problem of significantly shortening the lifespan of the The current collecting property does not easily start to rise. This prevents the current collecting property from dancing even on tracks with poor roadbed smoothness, and eliminates the generation of impact noise caused by the collision between the stopper and the stopper contact part. In addition, it is an object of the present invention to provide a rail backing electric device that can greatly extend the life of a stopper and a stopper contact portion, a collector, and a power supply rail.

[Summary of the invention]

That is, the present invention has a configuration in which the dome portion of the shoe is extended from its pivot position to the side opposite to the power supply rail, and a balance weight is provided on this extended portion.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

In Fig. 3, reference numeral 3 indicates a current collector, and this current collector 3 is supported by the rotating shaft 2 at its arm portion 3al2, and is connected vertically to the frame 1 via the rotating shaft 2. The arm portion 3a of the current collector shoe 3 (31 and 11), which is rotatably mounted on a shaft, is extended from its shaft support position to the opposite side of the power supply rail 1O, and the rear end of this extension portion Z5 is The rear frame 1.58 mm, which is important, is installed as a balance weight. Note that the current collector of this embodiment has a balance weight 158 behind the arm portion 3a of the current collector qI.
Except for the provision of the current collector, the other configurations are the same as the conventional current collector shown in FIG. however.

In this embodiment, since the extension part 3b is provided at the rear of the arm part 3a of the current collector shoe 3, the stopper contact part 13 that comes into contact with the descending restriction stopper IZ is supported by the arm part 3a at the lower edge of both ends thereof. Therefore, a reinforcing lip 16 is provided at the center of the balance weight 158 to support the center part of the stopper abutting part Z3 from behind to provide sufficient strength to the stopper abutting part 13. It has a meaning. In addition, the extension part I5 is extended to the extent that it does not come into contact with the bogie structure under the floor of the vehicle body, and the distance between the weight of the balance way The structure is such that the moment multiplied by the current collecting property 3 is an appropriate value within a smaller range than the moment multiplied by the distance from the east center of the collector to the center of rotation.

Next, to explain the function of the balance bar A) 15a, FIG. 4 is a mechanical model diagram of the current collector shown in FIG. The distance to the center, l is the distance from the presser foot spring 9 arm pressing position to the center of rotation, Lt is the balance weight 15'
It shows the distance from the center of gravity of a to the center of rotation, and also shows the distance of M.

is the weight of the current collector 3, F is the pressing force of the pressing spring 9, and λ1! indicates the weight of the balance weight 15a. Now, if we assume that the current collector 3 is in contact with the rail and is not in contact with the rail, then the current collector 3 is pushed downward by the pressing force of the pressing spring 9 and descends to the lowering limit. The stopper abutting portion 13 is in contact with II by the pressing force of the pressing spring 9 indicated in 011.

In this current collector, when the frame I descends with an acceleration of α2, the stopper contact portion 13 separates from the downwardly restricting stop bar 11 under the following conditions: Ml(αt-g)LH>P″l + M, (α21?
)L2, therefore, the limit of the vibration acceleration α of the frame 1 at which the current collector 3 causes the sagging phenomenon is Ml(α2
-S) Ig=F l + M2 (αtl)L2α
t (Ml LI −M2 L2 )=Fl + (MI
L1M2 L2) g.

Here, if we compare the above formulas (], ) and the above formula (2), α
, α2 is much larger than M, L,
-M2L2=== If the current calms down at Q, the current collector 3 will not start dancing even if the vibration acceleration α2 of the frame I is infinite. However, in general, the vibration of the car body will not become unreasonably large no matter how bad the track conditions are, so the maximum vibration acceleration of 71 Norm 1 can be predicted to some extent, and M, L, If the value of L becomes large, it will have the opposite effect, so the vibration acceleration α2 of frame I on a trajectory with bad conditions is predicted and M,Ll>M,L.

The weight M of the balance weight 752 and the distance from the center of gravity of the balance weight to the center of rotation may be selected so that. t “Oh, the balance weight 75a
The moment of inertia M2L2 is such that it cancels out the pressing force of the pressing spring 9 that presses the current collector 7 against the rail 10 surface (lI
If the values of M and L2 are made too large in order to make iJl easier, the dynamic response of the current collector 3 due to the action of the pressing spring 9 will be poor < f
C, the current collector 3 should be moved upwards according to the vibrations of the car body to maintain contact with the rail surface 10. The value of L2 should be as small as possible within the range that can prevent the dancing phenomenon of the current collector 3.
Desirable 7.

However, in this current collector, even if the vehicle body vibrates violently on a track under poor conditions with poor smoothness of the roadbed, the balance weight 151 as described above allows the current collector to
9 can be prevented from jumping up from the surface of the rail 10 and starting to dance, thus preventing the stopper 11.12 and the stopper abutting portion 1.9.14 from hitting violently due to the dance of the current collector 3, as in conventional current collectors. In addition, there is no possibility that the contact parts between the strain relief bars 11 and 12 and the strain relief contact portions 73 and 14 will be worn out or deformed by 1°, and the vibrations will be further reduced. There is no possibility that an arc will occur between the electric appliance 3 and the rail IO and cause them to melt.

〔Effect of the invention〕

Since the present invention has the above-mentioned configuration, the current collector does not easily start to move even when subjected to large vibration accelerations. Therefore, even if the current collector sticks to a track with poor roadbed smoothness j15 Prevents the dancing phenomenon of electric shoes, eliminates the generation of impact noise caused by the contact between the stopper and the stopper, and also reduces the lifespan of the stopper and the stopper, the current collector, and the power supply rail. can be extended to a wide width.

[Brief explanation of drawings]

I Figures 1 and 2 are a longitudinal sectional side view and a mechanical model diagram showing a conventional rail current collector, and Figures 3 and 4 are a longitudinal sectional side view and a mechanical model diagram of a rail current collector showing an embodiment of the present invention. It is a mechanical model diagram. I... Frame, 2... Rotating shaft, 3... Current collector,
3a...Arm part, 9...Press, 7.0...
Power supply rail, 11.12...stopper, 1,? ,
Z 4...stopper contact part, 1-5...extension part,
15a...Balance weight. Applicant's Representative Patent Attorney Takehiko Suzue Figure 1 Figure 2 Figure 13 to Figure 4

Claims (1)

[Claims] The arm part of the current collector is pivotally supported to be movable up and down on a frame attached to a car body running on a track, and the pressing force of a spring that presses the current collector against the power supply rail laid along the track i. In a rail current collector in which the frame is provided with a stopper for regulating the range of vertical movement of the current collector, the arm portion 1 of the current collector is moved from its pivot position to the opposite side of the power feeding rail i. A rail current collector characterized by having a balance weight provided in this extension.