JPH06107177A - Electric switching machine - Google Patents

Abstract

PURPOSE:To provide an electric switching machine that is less in overload and sure in a lock in addition to being miniaturized and made in lighter in weight. CONSTITUTION:A lock arm 20 is rotated along with rotation of its arm 10 till this lock arm 20 installed in the other side output shaft free of rotation, two notch parts 22a and 22b installed in an operating rod into which a tip part of the lock arm is inserted, and an end of the arm are all pushed in a recess. After being pushed in the recess, this switching machine consists of a lock arm rotating mechanism rotating the arm 10 alone, and an energizing mechanism energizing the tip part of the lock arm 20 to the notch part side at the time of rotation of the lock arm 20 and at a time when the tip part of the lock arm 20 is inserted into the notch part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric tipping machine, and more particularly to a small and lightweight electric tipping machine.

[0002]

2. Description of the Related Art Conventionally, as this kind of electric switch,
An escape type is known in which the rotation of a motor is reduced by a reduction gear device to rotate a conversion gear and a roller provided on the conversion gear operates an operating rod having an escape surface (“Signal” P.120). ~ 132, June 20, 1977, published by Koyusha Co., Ltd.). This escape-type electric turning machine is used in railways in Japan, the United States, and the United Kingdom, and has the feature that it has a strong force to press the tongue rail at the conversion end.

As another type of electric switching machine,
A rack and pinion type is known in which a pinion is provided on a motor and a rack is provided on an operating rod. This type is widely used in Europe except Britain, and has a feature that it is small and lightweight. However, since the pressing force at the end of the conversion is not large, the point part of the rail requires a special structure.

Among the above-mentioned conventional electric turning machines, the escape type has a feature that the pressing force at the conversion end portion is large, but in order to obtain this pressing force, the internal structure is complicated and large, and the weight is 400 kg. There was an inconvenience that it became a degree.

Further, the conventional rack and pinion type electric turning machine has a feature that it is small and lightweight, but since the point portion of the railroad railroad in Japan is not compatible with the rack and pinion type, it is adopted as it is. It has a problem that it cannot be done.

Therefore, in order to solve the above-mentioned problems, the applicant of the present invention has proposed, in Japanese Patent Application No. 3-73342, an electric rolling machine having a large pressing force at the conversion end portion despite its small size and light weight. Provided. The electric turning machine according to this proposal has a reversible motor and a differential gear mechanism having a pair of output shafts that input the driving force of the reversible motor and rotate in opposite directions,
The pair of output shafts is provided with a rack that operates the tongue rails by engaging with a pinion provided on one of the output shafts, and a pressing force is applied to the tongue rails by pushing the tip of an arm provided on the other output shaft. And an operating rod provided with a concave portion to be added.

The electric switching machine according to the further proposal will be described with reference to FIGS. 5 and 6. Note that FIG. 5 is a plan view in which a part of the electric switching machine is sectioned, and FIG. 6 is a sectional view taken along line BB in FIG.

A reversible motor (hereinafter referred to as a motor) M is
The rotary drive shaft 2 is provided on the right side surface of the casing 1 and has a small gear 3 located inside the casing 1. A well-known differential gear mechanism 4 composed of a combination of a plurality of spur gears G1 to G6 has an input shaft 5 having a large gear 6 with a torque limiter meshed with the small gear 3 and a rotation speed of a motor M. Is decelerated, and the motor M is protected even if an overload occurs in the transmission mechanism after the differential gear mechanism 4. And this differential gear mechanism 4
Is to further reduce the rotation speed of the input shaft 5 and to rotate the pair of output shafts 7a and 7b (hereinafter, 7a is referred to as a first output shaft and 7b is referred to as a second output shaft) in opposite directions. The number of teeth and meshing of each spur gear G1 to G6 are determined.

The first output shaft 7a and the second output shaft 7b have one end pivotally supported by the casing 1 and the other end pivotally supported by a bearing 1a provided in the casing 1.
The output shaft 7a is rotatably supported by the second output shaft 7b. Then, the pinion 8 is provided on the first output shaft 7a, and the second output shaft 7b is orthogonal to the axial center direction of the second output shaft 7b, and extends left and right about the axis. An arm 10 provided with rollers 9a and 9b is fixed to the key.

The operating rod 11 includes a pinion 8 and rollers 9a,
9b and the output shaft of the differential gear mechanism 4 (7
a, 7b) is provided so as to be movable in a direction orthogonal to the axial direction, and at one end side (upper part in FIG. 5, left side in FIG. 6),
Although not shown, a rolling rod connected to a tongue rail is provided. And the operating rod 1 corresponding to the pinion 8
A rack 12 is provided on the upper surface of 1, and
Roller 9a when the tongue rail contacts the basic rail
A recess 13 into which the rollers 9a and 9b can be inserted is provided below. The side shape of the recess 13 is formed to be substantially equal to the circumference drawn as the center of the second output shaft 7b when the tongue rail contacts the basic rail.

As for the positional relationship between the roller 9a and the concave portion 13, the tongue rail contacts the basic rail to rotate the second output shaft 7b, the roller 9a is pushed into the concave portion 13, and the roller 9a reaches the bottom portion of the concave portion 13. It is determined so that it can come into contact with one side surface (the side surface farther from the second output shaft 7b) 13a of the concave portion 13 without causing a stop. Further, the relationship between the roller 9b and the concave portion 13 is such that when the operating rod 11 moves in the opposite direction to the above and the roller 9b is inserted into the concave portion 13, the roller 9b has the other side surface 13b of the concave portion 13 as described above. It is decided that you can keep pressing. In addition,
In the figure, C is a cam provided at the tip of the second output shaft 7b, which is a switch S1 consisting of a pair of micro switches,
It is configured so that S2 can be turned on and off.

Next, the operation of the above electric switch will be described. Now, assuming that the motor M is rotated so as to move the operating rod 11 in the arrow A direction (see FIG. 5), the input shaft 5 of the differential gear mechanism 4 is rotated via the small gear 3 and the large gear 6. It The initial rotational force of the input shaft 5 is the gears G1, G2, G3 of the differential gear mechanism 4 (two gears are arranged around the gear G4 in the figure, but actually three gears are arranged,
It is integrated with the gear G5 through a shaft passing through the gear G2. Therefore, the number of gears G5 is also three. ), G4, the first output shaft 7a is rotated, and the pinion 8 integrated with the first output shaft 7a is rotated in the direction of arrow B in FIG. As a result, the operating rod 11 is moved in the arrow A direction.

When the operating rod 11 moves and the tongue rail comes into contact with the basic rail, the operating rod 11 is in a stopped state,
The rotational force of the input shaft 5 at this time is transmitted through the gears G1, G2, G5, G6 of the differential gear mechanism 4 to the second output shaft 7b in the direction of arrow C in FIG. 6 (the rotational direction of the first output shaft 7a). And the opposite direction). The rotation of the output shaft 7b pushes the roller 9a into the recess 13 of the operating rod 11. Operating rod 11
Means that the roller 9a is the upper end 1 of one side surface 13a of the concave portion 13.
When it comes into contact with 3 ', it is pressed with a large force in the direction of arrow a. Therefore, the operating rod 11 can press the tongue rail with a large force at the conversion end portion. Moreover, since the roller 9a is pushed into the concave portion 13 while the roller 9a is rotating, the roller 9a can be pushed in with a small resistance. Then, once the roller 9a is inserted into the recess 13,
It can serve as a stopper for stopping the movement of the operating rod 11 in the direction opposite to the arrow.

The cam C causes the switch S1 to act when the roller 9a is pushed into the recess 13, and the movement state of the operating rod 11 is detected. Further, the switch S2 is provided with the operating rod 11
Moves in the direction opposite to the arrow a, and the roller 9b moves into the recess 13
It operates when it is pushed in, but the movement of the operating rod 11 to the opposite side is performed by the reverse rotation of the motor M in the same manner as described above.

[0015]

The electric switching machine according to the above-mentioned proposal is provided with a differential gear mechanism 4, and one of the pair of output shafts 7a, 7b is used as a rack. Since the operating rod 11 of the pinion type is moved and the other output shaft 7b is used to apply the pressing force to the operating rod 11,
It is possible to make an excellent electric switching machine that combines the features of a rack and pinion type that is small and lightweight with the feature that a large pressing force can be obtained at the escape type conversion terminal.

However, the locking (locking) of the operating rod 11 is performed by inserting the rollers 9a and 9b into the recess 13, and the rollers 9a and 9b are located just below the recess 13. Sometimes the motor M is stopped,
Since the motor M and the differential gear mechanism 4 have an inertial force, when the rollers 9a and 9b come into contact with the lower portion of the recess 13 and are suddenly stopped, the rollers 9a and 9b and the rollers 9a and 9b are stopped. There is a risk that the frame 10, the differential gear mechanism 4, and the motor M will be overloaded. In order to absorb such an overload, the large gear 6 is provided with a torque limiter, but it has been desired to prevent the overload from occurring.

Therefore, the present invention has been made in order to meet the above-mentioned demand, and an object thereof is to provide an electric switching machine in which an overload does not occur and a lock is ensured.

[0018]

In order to achieve the above object, an electric switching machine according to the present invention is provided with a reversible motor and a pair of reversible motors which are driven in the opposite directions to rotate in opposite directions. A differential gear mechanism having an output shaft and a rack for operating the tongue rail by meshing with a pinion provided on one output shaft of the pair of output shafts, and a tip of an arm provided on the other output shaft In an electric switching machine having an operating rod having a concave portion for applying a pressing force to the tongue rail by pushing in the portion, a lock arm rotatably provided on the other output shaft and the arm. When the end of the arm is pushed into the recess, the notch provided in the operating rod into which the tip of the lock arm is inserted and the end of the arm are pushed into the recess. Lock arm And a lock arm rotating mechanism for rotating only the arm after being pushed, and a tip portion of the lock arm for assisting rotation of the lock arm in the locking direction. And a biasing mechanism that biases the tip end portion of the lock arm toward the cutout portion when the lock arm is inserted into the cutout portion.

[0019]

In the above structure, when the other output shaft rotates in the predetermined direction, the operating rod moves in the predetermined direction by the pinion and the rack, and the lock arm rotates in the same direction as the arm by the lock arm rotating mechanism and the biasing mechanism. Turn to. When the end of the arm is pushed into the recess, the tip of the lock arm is inserted into the notch to lock the operating rod. The lock state of the lock arm is maintained by the biasing mechanism.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view in which a part of an electric tipping machine according to an embodiment is cross-sectioned, and FIG. 2 is a side view taken along the line AA of FIG. 1, and FIGS. It is explanatory drawing which shows the operation state seen from the said direction. Note that the same components as those in FIGS. 5 and 6 are denoted by the same reference numerals, and the description of these components will be duplicated so that only new portions will be denoted by different reference numerals.

Reference numeral 20 denotes a lock arm, and the arm 10
It is formed to be a little longer than that, is positioned in parallel with the left side of the arm 10 (see FIG. 1), and the central portion thereof is rotatably provided on the second output shaft 7b.

The arms 21a and 21b are on the opposite side of the rollers 9a and 9b and located above the rollers 9a and 9b.
Pins provided in the lock arms 20, and the tips of the pins are movably inserted in the long holes 20a and 20b provided in the lock arm 20, respectively.

The longitudinal direction of the elongated holes 20a, 20b is on the circumference centered on the axis of the second output shaft 7b, and the relationship between the elongated holes 20a, 20b and the pins 21a, 21b is shown in FIG. ~
As shown in FIG. 4, when one pin 21a abuts the lower end of the one elongated hole 20a, the other pin 21b abuts the upper end of the other elongated hole 20b, and one pin 21a When contacting the upper end of the slot 20a, the other pin 2
It is determined that 1b abuts the lower end of the other elongated hole 20b. That is, the arm 10 and the lock arm 20 are configured to be freely rotatable by the length of the elongated holes 21a and 21b, and the pins 21a and 21b and the elongated holes 20a and 20b are the lock arm rotations of the present invention. It constitutes the dynamic mechanism.

Reference numerals 22a and 22b are notches provided in the operating rods 11 on both sides of the recess 13, respectively, so that parts of the L-shaped tip portions 22c and 22d of the lock arm 20 can be inserted respectively. Is configured. Cutout 22
The positional relationship between a, 22b and the tip portions 22c, 22d is such that, when one roller 9a pushes the concave portion 13, a part of the one tip portion 22c is inserted into the one notch portion 22a and the other roller 9b is When the recess 9a presses the recess 13, a part of the other tip 22d is inserted into the other notch 22b.

Reference numeral 23 is a compression spring, which constitutes the urging mechanism of the present invention, is provided between the central portion of the lock arm 20 and the bottom wall 1a of the casing 1 which vertically abuts the central portion, and , The lower part is rotatably provided. The mounting position of the compression spring 23 of the lock arm 20 is horizontal as shown in FIG. 3 (the lock arm 20 is parallel to the operating rod 11).
Therefore, it is determined to exist on a vertical line passing through the axis of the second output shaft 7b. Next, the operation of the electric switching machine according to the present embodiment will be described. FIG. 2 shows a state in which the operating rod 11 is locked by the one end portion 20c of the lock arm 20 when the operating rod 11 is in the state shown in FIG.

That is, when the arm 10 is rotated so that the second output shaft 7b rotates and the roller 9a pushes the concave portion 13, the lock arm 20 also starts to rotate in the same direction by the pins 21a and 21b. When the lock arm 20 is rotated to a certain position, the attachment position of the compression spring 23 on the lock arm 20 side is moved from the vertical line to the left side, so that the lock spring 20 is rotated counterclockwise by the compression spring 23. A force is applied to push the tip portion 20c into the notch portion 22a at a stretch, which causes the operating rod 11 to move the roller 9a to the concave portion 1a.
Locked before completing push-in of 3. The motor M
Is stopped when the roller 9a completes pushing in the concave portion 13.

When the lock arm 20 is rotated, the compression spring 23 generates a force for urging the tip portion 20c toward the cutout portion 22a, so that the operating rod 11 is stably maintained in a locked state. Then, a part of the tip portion 20c is provided with the cutout portion 22a
When the arm 10 is positioned on the operating rod 11 in a state of being inserted into the armature and is prevented from further rotating, the arm 10 still has the long holes 20a and 20b.
Therefore, the inertia of the motor M and the differential gear mechanism 4 can be effectively released.

In FIG. 3, the pinion 8 rotates and the operating rod 11 moves.
Shows the middle of moving to the left. In this case, both rollers 9a, 9b of the arm 10 are located on the operating rod 11 apart from the recess 13 and the arm 10 is kept substantially horizontal. Therefore, the lock arm also has pins 21a, 2
The lock of the tip portion 20c is released by being rotated to a horizontal state by 1b.

FIG. 4 shows a state in which when the roller 9b is pushed into the recess 13, the other tip 20d is inserted into the notch 22b and the operating rod 11 is locked. This state has a relationship opposite to that of FIG. 2, and therefore further description will be omitted.

The electric turning machine according to this embodiment includes a lock arm 20 rotatably provided on the other output shaft 7b,
Notch portions 22a and 22b provided on the operating rod 11 into which the tip portions 20c and 20d of the lock arm 20 are inserted when the rollers 9a and 9b of the arm 10 are pushed into the recessed portion 13.
Then, the lock arm 20 is rotated along with the rotation of the arm 10 until the rollers 9a and 9b are pushed into the recess 13, and only the arm 10 is rotated after being pushed in. Mechanism and tip portions 20c, 20 of the lock arm 20 during rotation of the lock arm 20 and when the tip portion thereof is inserted into the notches 22a, 22b.
Since it has an urging mechanism for urging d toward the notch,
The operating rod 11 is locked by the lock arm 20 even if it is not locked by the rollers 9a, 9b.
Can be made free, and the inertia of the motor M or the like can be effectively released.

In the above embodiment, the differential gear mechanism 4 is used.
Is a combination type of spur gears, but another differential gear mechanism using bevel gears can be used as long as the output shafts rotate in opposite directions.

[0032]

According to the electric tipping machine of the present invention, the lock arm rotatably provided on the other output shaft and the lock arm when the end of the arm is pushed into the recess. The lock arm is rotated along with the rotation of the arm until the end of the arm is pushed into the recess and the notch provided in the operating rod into which the tip of the arm is inserted. Is a lock arm rotation mechanism that rotates only that arm,
Since the lock arm has a biasing mechanism that biases the tip of the lock arm toward the notch when the lock arm rotates and when the tip is inserted into the notch, the operating rod is not locked by the arm. Both are locked by the lock arm,
The arm can be free, and inertia of the motor or the like can be effectively released.

[Brief description of drawings]

FIG. 1 is a plan view showing a partial cross section of an electric switching machine according to an embodiment of the present invention.

FIG. 2 is a side view seen from the direction of the line AA in FIG.

FIG. 3 is a side view as seen from the direction of the line AA in FIG.

FIG. 4 is a side view seen from the direction of the line AA in FIG.

FIG. 5 is a plan view in which a part of the electric tipping machine according to the previous proposal is shown in section.

6 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

 4 differential gear mechanism 7a first output shaft (one output shaft) 7b second output shaft (other output shaft) 8 pinion 9a, 9b roller 10 arm 11 operating rod 12 rack 13 recess 20 lock arm 20a, 20b long hole 20c, 20d Tip part 21a, 21b Pin 22a, 22b Notch part 23 Compression spring

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshifumi Kikuchi 1-13-8 Kamikizaki, Urawa-shi, Saitama Nihon Signal Co., Ltd. Yono Works (72) Inventor Hosuke Uetake 1-13, Kamikizaki, Urawa-shi, Saitama No. 8 Japan Signal Co., Ltd. Yono Office

Claims (1)

[Claims] 1. A reversible motor, a differential gear mechanism having a pair of output shafts for inputting driving force of the reversible motor and rotating in mutually opposite directions, and one output shaft of the pair of output shafts. And a rod for operating the tongue rail by engaging with the pinion, and an operating rod having a concave portion for applying a pressing force to the tongue rail by pushing the tip of an arm provided on the other output shaft. In the rolling machine, a lock arm rotatably provided on the other output shaft, and a tip end portion of the lock arm inserted when an end portion of the arm is pushed into the recess. The cutout portion provided on the operating rod and the lock arm is rotated along with the rotation of the arm until the end portion of the arm is pushed into the concave portion, and after being pushed, the lock arm is rotated. Just the arm A lock arm rotating mechanism for rotating the lock arm, and a lock arm rotating mechanism for assisting rotation of the lock arm in a locking direction, and when the tip of the lock arm is inserted into the cutout portion, the tip end of the lock arm is provided on the cutout side. And an urging mechanism for urging the electric switch.