JP2015012744A - Pantograph for railway vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pantograph for a railway vehicle which can suppress increase of a slide resistance of a pressing part for an extended period and can surely change an attitude of a hook member.SOLUTION: A pantograph for a railway vehicle is equipped with: a framework having a lower frame, which is oscillatively connected to an underframe, and an upper frame which is oscillatively connected to the lower frame and supports a collector head; and a lock mechanism 6 for holding the framework in a folded attitude. The lock mechanism includes: a rotatable hook member 61 having a hook part 61a which engages with a hook receiving element provided on the collector head; a coil spring 64 which energizes the hook member in one rotational direction so that the hook part can be engaged with the hook receiving element; and an actuator 65 having a pressing rod 65a which can contact the hook member. A tip of the pressing rod presses the hook member while sliding on a surface of the hook member thereby rotating the hook member in the other rotational direction, a groove 61c is so formed in the hook member 61 as to correspond to a range within which the pressing member slides on the surface of the hook member, and the groove is filled with a lubricant.

Description

  The present invention relates to a pantograph for a railway vehicle that is mounted on a railway vehicle and collects electric power from an overhead line.

  This type of pantograph for a railway vehicle is known from Patent Document 1, for example. This is an upper frame that supports a current collector boat that is swingably connected to a lower frame that is swingably connected to a base frame disposed on a roof of a railway vehicle via an insulator. A frame having a frame, and a lock mechanism that holds the frame in a folded position in which the current collecting boat is separated from the overhead line when the frame is lowered from the deployed posture in which the current collecting boat is in sliding contact with the overhead line.

  The lock mechanism includes a swivelable saddle member having a collar portion that engages with an engagement portion (ceiling pipe) provided on the current collector boat, and a turning direction in which the collar portion can engage the engagement portion. It has a biasing means that biases it toward one side, and an actuator having a pressing portion that can come into contact with the flange member. Then, when the frame is lowered from the deployed posture, the engaging part presses the collar part to rotate the collar member in the other direction of rotation against the urging force of the urging means, and the engaging part passes the collar part. Then, the urging force of the urging means turns to one side in the turning direction, the hook part engages with the engaging part, and the frame is held in the folded position by the hook member in the locked position. On the other hand, when returning from the folded position to the deployed position, the actuator is operated to bring the pressing portion into contact with the eaves member, and the tip of the pressing portion slides on the surface of the eaves member against the urging force of the urging means. While pressing the hook member, the hook member is turned in the other turning direction to release the engagement between the hook portion and the engaging portion. Thereby, a collar member will be in a retracted attitude | position and a frame will raise.

  Here, since the pantograph for railway vehicles is always used in a situation where it is exposed to the outside air, rust may be generated on the surface of the flange member of the lock mechanism or dust may be attached. And, when rust is generated on the surface of the eaves member or dust is attached, when the engagement between the eaves portion and the engagement portion is released, the sliding resistance of the pressing portion increases and the eaves member is There is a problem that the retracted posture cannot be reliably established. In such a case, it is conceivable to apply a lubricant such as grease to the sliding surface between the pressing portion and the flange member. However, every time the pressing part slides on the surface of the flange member, the lubricant is scraped off. As a result, the sliding resistance of the pressing part increases in a short time.

JP-A-7-107603

  In view of the above points, the present invention provides a pantograph for a railway vehicle that can prevent the sliding resistance of the pressing portion from increasing for a long time and can reliably change the posture of the eaves member. It is to be an issue.

  In order to solve the above problems, the pantograph for a railway vehicle of the present invention, which is mounted on the roof of the railway vehicle and collects power from an overhead line, is swingably connected to a frame arranged on the roof of the railway vehicle. And a lock mechanism that holds the frame in a folded position in which the current collecting boat is separated from the overhead line. Provided, the lock mechanism includes a swivelable hook member having a hook part that engages with an engaging part provided on the frame or the current collector boat, and a turning direction in which the hook part is engageable with the engaging part. It has an urging means for urging toward one side and an actuator having a pressing portion that can come into contact with the heel member, and the tip of the pressing portion slides on the surface of the heel member against the urging force of the urging means. While pressing the scissors member, the scissors member is swung in the other turning direction, and the pressing portion slides on the scissors member surface. Range to correspond to a groove is formed in the hook material, characterized by being filled with the lubricant in the groove.

  According to the present invention, since the groove is formed in the flange member and the groove is filled with the lubricant, even if the pressing portion repeatedly slides on the surface of the flange member and the lubricant is scraped off, the groove is filled in the groove. Since the lubricant is always present in a range in which the lubricant is exposed and the pressing portion slides on the surface of the flange member, an increase in the sliding resistance of the pressing portion over a long time is suppressed. As a result, the posture of the collar member can be changed reliably.

  Here, as another method for suppressing an increase in the sliding resistance of the pressing portion, it is conceivable to form a groove at the tip portion of the pressing portion that contacts the flange member and to fill the groove with a lubricant. . However, while the pressing portion slides on the surface of the flange member, it is necessary to stop the pressing portion so that the groove extends along the sliding direction, which makes the structure complicated, Inviting an increase in the number of parts. On the other hand, in the present invention, since the groove is formed in the flange member, an increase in the sliding resistance of the pressing portion can be suppressed with a simple configuration.

The side view which shows the pantograph for railroad vehicles of embodiment of this invention in an expansion | deployment attitude | position. (A) And (b) is the side view and rear view which expand and show a locking mechanism.

  Hereinafter, an embodiment of a pantograph for a railway vehicle of the present invention that is mounted on a roof of the railway vehicle and collects electric power from an overhead line will be described with reference to the drawings. In the following, terms indicating directions such as up, down, left, right, clockwise, and counterclockwise are based on FIG.

  Referring to FIG. 1, PG is a pantograph of the present embodiment. The pantograph PG includes a frame 1 disposed on a roof of a railway vehicle (not shown) via an insulator. A lower frame 21 is swingably connected to the underframe 1 via a main shaft 21a. An upper frame 23 is swingably connected to the upper end of the lower frame 21 via a hinge 22, and the lower frame 21 and the upper frame 23 constitute a frame 2. The current collecting boat 3 is supported by the upper frame 23. A balancing rod 24 is connected between the lower end of the upper frame 23 and the base frame 1, and the horizontal posture of the current collecting boat 3 is set between the hinge 22 and the current collecting boat 3 when the frame 2 is raised and lowered. A boat support rod 25 for keeping is connected. Since a known boat can be used as the current collector boat 3, detailed description thereof is omitted here.

  A main spring 4 is incorporated in the frame 1, and a compressive force of the main spring 4 acts on a first cam member 21 b that is externally fixed to the main shaft 21 a. As a result, the main shaft 21a is normally rotated by a clockwise torque, whereby the frame 2 is raised, and the collector boat 3 is brought into sliding contact with the overhead wire (not shown) (see FIG. 1). The drive rod 51 of the air cylinder 5 is connected to the second cam member 21c that is externally fixed to the main shaft 21a. As a result, the frame 2 in the unfolded position is lowered by rotating counterclockwise torque by the air cylinder 5 against the compression force of the main shaft 21a and the main spring 4, and the current collecting boat 3 is shown in FIG. The folding posture is separated from the outside overhead line.

  Further, the frame 1 is provided with a lock mechanism 6 that keeps the frame 2 in a folded posture (right end portion in FIG. 1). Referring also to FIG. 2, the lock mechanism 6 is pivotable via a shaft body 62 fixed to the frame 1, which is engaged with a pin-shaped rod receiver 31 as an engaging portion provided in the current collector boat 3. A gutter member 61 is provided. A frame 63 is connected to the collar member 61, and a coil spring 64 as a biasing means is contracted between the frame 63 and the collar member 61, and the collar 61 a can be engaged with the collar receiver 31. It is always urged toward one direction (counterclockwise direction), and at this time, the hook 61a is in a locked posture (the posture shown by a solid line in FIG. 2).

  A bulging portion 61b that bulges outward in an arc shape is provided below the shaft body 62 of the flange member 61, and a pressing rod as a pressing portion that can contact the bulging portion 61b of the flange member 61. An actuator 65 having 65 a is provided on the frame 1. Since the actuator 65 can be a known one such as an air cylinder or a solenoid, a detailed description thereof is omitted here. When the frame 2 is lowered from the deployed posture, the collar receiver 31 comes into contact with the upper surface of the collar part 61a and slides on the inclined upper surface of the collar part 61a, thereby resisting the biasing force of the coil spring 64. When the member 61 is turned in the other turning direction, and the hook receiver 31 passes through the slope of the hook 61a, the hook 61 turns in the turning direction by the biasing force of the coil spring 64, and the hook engages with the engaging portion. Thereby, the framework 2 is held in the folded posture.

  On the other hand, when the actuator 65 is actuated, the tip (left end surface) of the pressing rod 65a presses the flange member 61 while sliding on the surface of the bulging portion 61b of the flange member 61 against the biasing force of the coil spring 64. The hook member 61 is turned in the other turning direction (clockwise) to be in a retracted position where the engagement between the hook portion 61a and the hook receiver 31 can be released (attitude shown by a two-dot chain line in FIG. 2). Thereby, the framework 2 returns from the folding posture to the deployed posture.

  Here, since the pantograph PG is always used in a situation where it is exposed to the outside air, rust may be generated on the surface of the eaves member 61 or dust may adhere. For this reason, it is necessary to ensure that the collar member 61 can change its posture from the locked position to the retracted position even when rust is generated on the surface of the collar member 61 or dust is attached. . Therefore, the groove 61c is formed in the bulged portion 61b so as to correspond to the range in which the left end surface of the pressing rod 65a slides on the surface of the bulged portion 61b of the flange member 61, and the groove 61c is filled with grease as a lubricant. In this case, known grease can be used, and the width and depth of the groove 61c are appropriately set in consideration of the contact area with the pressing rod 65a, mechanical strength, and the like.

  According to the above embodiment, even when the pressing rod 65a repeatedly slides on the surface of the bulging portion 61b of the flange member 61 and the grease is scraped off, the grease filled in the groove 61c appears and the pressing rod 65a is exposed. Since grease always exists in the range where the surface slides on the surface of the bulging portion 61b, the sliding resistance of the pressing rod 65a is suppressed from increasing for a long time. As a result, the posture of the collar member 61 can be changed reliably.

  By the way, it is conceivable that another groove is formed at the tip of the pressing rod 65a that contacts the surface of the bulging portion 61b, and the groove is filled with grease. However, while the pressure rod 65a slides, it is necessary to stop the pressure rod 65a so that the groove extends along the sliding direction. Invite the increase. On the other hand, in the thing of the said embodiment, since the groove | channel 61c was formed in the bulging part 61b, it can implement | achieve the increase in the sliding resistance of the press rod 65a with a simple structure.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to said thing. In the above-described embodiment, the single-arm type pantograph PG has been described as an example. Moreover, although the said embodiment demonstrated the example which provided the bulging part 61b in the part below the shaft 62 of the collar member 61, and pressed the bulging part 61b with the press rod 65a, and made the swivel member 61 turn. However, the present invention is not limited to this, and the pressing position of the pressing rod 6 and the form of the flange member 61 can be arbitrarily set.

PG ... Pantograph for railway vehicle, 1 ... frame, 2 ... frame, 21 ... lower frame, 23 ... upper frame, 3 ... collecting boat, 6 ... lock mechanism, 61 ... saddle member (lock mechanism), 61a ... saddle 64 ... Coil spring (biasing means), 65 ... Actuator (lock mechanism), 65a ... Pressing rod (pressing part).

Claims (1)

A pantograph for a railway vehicle that is mounted on the roof of a railway vehicle and collects power from an overhead line,
A frame having a lower frame swingably connected to a base frame disposed on a roof of the railway vehicle, and an upper frame supporting the current collecting boat swingably connected to the lower frame; A lock mechanism that holds the frame in a folding posture in which the boat is separated from the overhead line, and the lock mechanism includes a swivelable ridge member that has a hook that engages with an engagement portion provided on the frame or the current collector boat; The urging means has an urging means for urging the heel member toward one side in the turning direction in which the heel portion can be engaged with the engaging portion, and an actuator having a pressing portion capable of contacting the heel member. In which the tip of the pressing part slides on the surface of the heel member against the urging force and presses the heel member to turn the heel member in the other turning direction.
A railcar pantograph characterized in that a groove is formed in the gutter member in correspondence with a range in which the pressing portion slides on the surface of the gutter member, and the groove is filled with a lubricant.

Images