JP3040437B2 - Brake equipment for railway vehicles - Google Patents

Abstract

PURPOSE:To increase the extent of adhesive tractive braking force by making an attaction block go down at a time when the strong braking force is required, and vacuum-sucking air in a space being partitioned between a recess formed on the underside and a rail top by means of an sucking device. CONSTITUTION:As an auxiliary brake for an adhesive tractive type brake, two symmetrical sucking blocks per bogie, almost at the center in the longitudinal direction of a connecting rod 2 connecting each axle box 1 situated in front and in the rear, are set up in each upper position of symmetrical rails 4. Then, an air cylinder 9 is insulated in space between a frame body 8 held by the axle box 1 and the upper part of a supporter 6, and air in the air cylinder 9 is evacuated at time of brake operation, through which these sucking blocks 3 are made so as to be lowered by its own weight. Each sucking block 3 has a horizontal lower surface 3b of almost the same form as a top face of an outer profile of the rail 4, and a recess 3c extending over almost the whole range in the longitudinal direction is formed in an inner part of this lower surface 3b, while this recess 3c is connected to a suction pump as sucking device via a connecting port 3d and suction pipe 14.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is intended to be used in combination with a brake device for a railway vehicle, particularly, an adhesive type stop brake or deceleration brake which has been generally used in the past. The present invention relates to a brake device for a railway vehicle which is optimally used as an auxiliary brake of an adhesive type.

[Conventional technology]

2. Description of the Related Art As a brake device for a railway vehicle, a device employing an adhesive system has been generally used. This type of brake device has a long history and many types, but in any case, it has a structure that applies reverse torque to the wheels and finally obtains the braking force by the frictional force generated between the wheels and the rail. is there. For this reason, when the reverse torque is excessively large, a sliding phenomenon in which the wheels stop on the rails and slide on the rails occurs, and the braking distance is rather long and the wheels are unevenly worn.

Here, the maximum driving speed of railway vehicles is regulated by the braking performance, so if the braking performance is not improved, it will not be possible to speed up, and in recent years, which has been increasing year by year, the performance required for braking is It's getting very tough.

For this reason, the brake using the adhesive system has already reached its limit, and at present, it is necessary to rely on other brakes using the non-adhesive system for insufficient braking force.

In order to respond to this request, a method employing an electromagnetic adsorption method (for example, see Japanese Patent Application Laid-Open No. 64-90864, Japanese Utility Model Application Laid-Open No. 55-48526, etc.) and a rail crimping method in which a brake shoe is pressed against a rail are employed. (For example, see JP-A-62-2806)
Various publications have been developed.

[Problems to be solved by the invention]

However, a brake employing the electromagnetic attraction method requires a strong electromagnet, which not only increases the weight, but also requires a large amount of electric power at the time of braking, and is not suitable for anything other than an electric vehicle. In addition, if the frequency of use is increased, the iron rail is magnetized, and there is a danger of causing other obstacles.

In general, rail crimping systems are relatively simple in structure, but because the rails are pressed vertically downward, the reaction force causes the vehicle body to receive a force in the floating direction, causing a reduction in wheel weight. I will. As a result, there has been a problem that when the brake is also used as an adhesive system, the skid is likely to occur.

In view of the above, the present invention provides an apparatus in which the braking force can be strengthened by using it together with an adhesive type brake, and the braking force of the adhesive type brake is not reduced due to a decrease in wheel load. The purpose is to do.

[Means for solving the problem]

In order to achieve the object, a brake device for a railway vehicle according to the present invention is disposed above a pair of left and right rails on which the railway vehicle travels, a lower surface extending along an upper surface of the rail, and an inner side of the rail. A pair of left and right suction blocks each having a flange portion extending along a side surface, and a concave portion extending along the longitudinal direction of the rail is formed on the lower surface, respectively; Connecting means for connecting the left and right at intervals according to the distance between the rails, and supporting means for supporting the pair of left and right suction blocks, which are held by respective axle boxes provided at both ends of a pair of front and rear axles, respectively. An elevating hand interposed between the support means and the pair of left and right suction blocks to raise and lower the pair of left and right suction blocks with respect to the rail; And a step, when the suction block is lowered onto the rail, is in close contact with the upper surface of the rail to form a hermetically sealed space between the concave portion of the suction block and the upper surface of the rail. A sealing member attached to each of the pair of left and right suction blocks, and a negative pressure for sucking air in the hermetically sealed space to urge the suction block toward the upper surface of the rail. Suction means to be formed; and friction means pressed onto the rail by the suction block.

(Operation)

According to the present invention configured as described above, the suction block is lowered onto the upper surface of the rail by using the lifting / lowering means, and the airtight seal formed between the concave portion formed on the lower surface of the suction block and the upper surface of the rail. When the air in the sealed space is sucked using the suction means, the suction block presses the friction means against the upper surface of the rail by the negative pressure generated in this space, so that a strong auxiliary braking force can be obtained.

At this time, the pair of left and right suction blocks is supported by the support means held by each axle box. Thus, the pair of left and right suction blocks do not vibrate or tilt with the movement of the bogie frame as in the case where they are supported by the bogie frame, and can maintain an extremely stable posture.

In addition, the pair of left and right suction blocks each have a flange portion extending along the inner side surface of the rail,
Since the left and right rails are connected to each other at an interval corresponding to the interval between the pair of left and right rails by the connecting means, the pair of left and right suction blocks are not displaced in the width direction of the rail upper surface.

Thus, the sealing means provided on the suction block can be reliably brought into contact with the upper surface of the rail, so that an airtightly sealed space can be formed, and the air in this space is sucked by the suction means. By applying a negative pressure, a strong auxiliary braking force can be reliably obtained.

In addition, the downward force generated by the negative pressure acting on the pair of left and right suction blocks is transmitted to the axle via the lifting / lowering means, the support means, and the axle box, so that the axle weight is securely increased. The adhesive braking force can be increased by a corresponding amount.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

The present embodiment shows an example in which the present invention is used as an auxiliary brake of an adhesive brake (not shown) which has been generally used.

1 to 3 show the first embodiment, and FIG.
As shown in FIG. 3 and FIG. 3, the axle boxes 1 located at the front and rear are connected by connecting rods 2 and a total of two left and right suction blocks 3 per vehicle are provided substantially at the center in the longitudinal direction of the connecting rods 2.
Are arranged above the left and right rails 4.

The suction block 3 is provided with a flange 3a protruding downward from the widthwise inside of the rail 4 similarly to the contour of the wheel 5, and via a support 6 so that the right and left sides can maintain a correct back gauge. They are connected by cross beams (connection members) 7.

Further, between a frame (supporting means) 8 connected to the axle box 1 via the connecting rod 2 and an upper portion of the support 6,
An air cylinder (elevating means) 9 is interposed, whereby the normal suction block 3 is lifted by the air cylinder 9 above the rail 4 via the support 6,
When the air in the air cylinder 9 is evacuated during the braking operation, the air cylinder 9 descends by its own weight.

The suction block 3 has a horizontal lower surface having substantially the same shape as the upper surface of the outer contour of the rail 4 as shown in an enlarged manner in FIG.
The suction block 3 is provided inside the lower surface 3b.
A concave portion 3c extending over substantially the entire area in the length direction is formed, and the concave portion 3c communicates vertically through a communication port 3d. Furthermore, located on both sides of the recess 3c,
A downwardly protruding sealing material 10 is disposed, so that when the suction block 3 is lowered, the concave portion 3c of the suction block 3 is formed.
A space hermetically sealed by the sealing material 10 is formed between the rail and the upper surface of the rail 4.

Note that an attachment receiver 12 is provided above the suction block 3 via a support plate 11.

As shown in FIG. 2, a friction material 13 for increasing the frictional force at the time of braking is buried in the center of the concave portion 3c in the length direction, and the communication port 3b is connected to a suction pipe 14 The suction pipe 14 is connected to a suction pump (suction means) not shown.

Thereby, at the time of high-speed operation requiring an auxiliary braking force, the suction block 3 is lowered by bleeding the air in the air cylinder 9, and the recess 3 c formed on the lower surface of the suction block 3 and the upper surface of the rail 4 are connected. When air in a hermetically sealed space formed between the air and the air is sucked by a suction pump, the negative pressure generated in this space causes the suction block 3 to move the friction material (friction means) 13 onto the upper surface of the rail 4. Since pressing is performed, a strong auxiliary braking force can be obtained.

At the same time, the negative pressure acting on the suction block 3 also acts on the support 6, the air cylinder 9, the frame 8, the connecting rod 2, and the direction in which the wheel load increases through the axle box 1, so that the wheel load increases. The adhesive braking force can be increased accordingly.

By providing a vacuum tank separately from the suction pump, the brake operation can be quickly performed in an emergency.

Further, the suction pump and the vacuum tank can be installed, for example, under the floor of the vehicle body.

〔The invention's effect〕

Since the present invention is configured as described above, the suction block is lowered on the upper surface of the rail by using the elevating means, and the airtight seal formed between the concave portion formed on the lower surface of the suction block and the upper surface of the rail is used. When the air in the sealed space is sucked using the suction device, the suction block presses the friction means against the upper surface of the rail due to the negative pressure generated in the space, so that a strong auxiliary braking force can be obtained.

At this time, the pair of left and right suction blocks is supported by the support means held by each axle box. Thus, the pair of left and right suction blocks do not vibrate or tilt with the movement of the bogie frame as in the case where they are supported by the bogie frame, and can maintain an extremely stable posture.

In addition, the pair of left and right suction blocks each have a flange portion extending along the inner side surface of the rail,
Since the left and right rails are connected to each other at an interval corresponding to the interval between the pair of left and right rails by the connecting means, the pair of left and right suction blocks are not displaced in the width direction of the rail upper surface.

Thereby, the sealing means provided on the suction block can be reliably brought into contact with the upper surface of the rail, so that an airtightly sealed space can be reliably formed, and the air in this space is sucked by the suction means. By applying suction and applying a negative pressure, a strong auxiliary braking force can be reliably obtained.

In addition, the downward force generated by the negative pressure acting on the pair of left and right suction blocks is transmitted to the axle via the lifting / lowering means, the support means, and the axle box, so that the axle weight is securely increased. The adhesive braking force can be increased by a corresponding amount.

Therefore, when the braking device of the present invention is used together with a conventional general adhesive type brake, a strong auxiliary braking force can be obtained, which can contribute to speeding up the train.

Further, it is relatively simple in structure, does not increase the weight so much, and has a rail surface cleaning effect.

[Brief description of the drawings]

1 to 3 show an embodiment of the present invention. FIG. 1 is an enlarged sectional view of a suction block, FIG. 2 is a side view of a railway car, and FIG. FIG. 1 ... Axle box, 3 ... Suction block, 3b ... Bottom surface, 3c ...
Recess, 3d: communication port, 4: rail, 9: air cylinder, 10: sealing material, 13: friction material, 14: suction pipe, 15: bogie frame.

Continuation of the front page (56) References JP-A-2-34466 (JP, A) JP-A-50-15229 (JP, A) JP-A-1-262238 (JP, A) JP-A 49-126027 (JP, A) , A) Japanese Utility Model Showa 54-90811 (JP, U) Japanese Patent Publication No. 45-16402 (JP, B1) Japanese Utility Model Showa 45-31609 (JP, Y1) (58) Fields surveyed (Int. Cl. ⁷ , DB Name) B61H 7/00 B61H 7/12 F16D 63/00 F16D 65/30

Claims (1)

(57) [Claims] 1. A rail is disposed above a pair of left and right rails on which a railcar travels, and has a lower surface extending along an upper surface of the rail and a flange portion extending along an inner side surface of the rail, respectively. On the lower surface, a pair of left and right suction blocks, each of which is provided with a recess extending along the longitudinal direction of the rail, is connected to the left and right at a distance corresponding to the distance between the pair of left and right rails. Connecting means, supporting means for supporting the pair of left and right suction blocks held by respective axle boxes provided at both ends of a pair of front and rear axles, and the support means and the pair of left and right suction blocks. Elevating means interposed between the pair of left and right suction blocks for raising and lowering the pair of left and right suction blocks with respect to the rail; and when the suction block drops on the rail. A sealing member attached to each of the pair of left and right suction blocks to form a space hermetically sealed between the concave portion of the suction block and the upper surface of the rail in close contact with the upper surface of the rail. Suction means for sucking air in the hermetically sealed space to form a negative pressure for urging the suction block toward the upper surface of the rail; and A brake device for a railway vehicle, comprising: a friction material to be pressed;