JPH0632510Y2 - Disc brake device for railway vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a disc brake device for a railway vehicle, and more particularly to an end portion of a rotor shaft of a drive motor for transmitting rotation to an axle of the railway vehicle. The present invention relates to a disc brake device provided.

[Conventional technology]

As a configuration of a conventional disk brake device for a railroad vehicle, for example, the one disclosed in Japanese Utility Model Laid-Open No. 64-4933 discloses an axle 1 for supporting wheels 100, 100 as shown in FIG.
An induction motor (driving motor) 102 is installed on one side of 01, a disc 104 is fixed to one end of a rotor shaft 103 of the induction motor 102, and a pair of pads 106, 106 attached to a caliper 105. The disk 104 is interposed between them. The induction motor 102 is fixedly installed on a vehicle-side member such as a truck, and the caliper 105 is held by the vehicle-side member or the induction motor 102. A drive gear 108 is attached to the other end of the rotor shaft 103 via a flexible joint 107, and a driven gear 109 meshed with the drive gear 108 is attached to the corresponding end of the axle 101.
Is attached. According to such a configuration, when the vehicle is traveling, the axle 101 and the wheels 100, 100 are rotationally driven according to the rotation of the rotor shaft 103 of the induction motor 102, but when the brake command is issued, the caliper 105 is used. When the pads 106, 106 of the disk are pressed against both surfaces of the disk 104, a braking action is performed and the rotor shaft 103 and the axle 101
As a result, the rotation of the wheels 100,100 will stop.

However, the disc brake device disclosed in the above publication uses one disc 104, and since the disc 104 is usually made of an iron-based metal material, its heat capacity is small. In addition, it has the characteristic that it tends to be in a high temperature state during braking. In addition to this, since the iron-based metallic material has a characteristic of extremely low strength under high temperature conditions, the disk 10 is
The strength of 4 suddenly decreases due to heat, causing uneven wear and cracks on the disk 104, which not only shortens the life of the disk 104, but also causes imbalance of the disk 104 to cause vibrations and the induction motor 102. This causes a problem that the bearing of the rotor shaft 103 is damaged early.

In order to deal with such a problem, for example, according to Japanese Utility Model Laid-Open No. 1-117972, as shown in FIG. 10, a disk 10 is provided at each end of a rotor shaft (hollow armature shaft) 103 of an induction motor 102.
There is disclosed a configuration including two calipers 105, 105 for fixing the four disks 104, and for sandwiching the two disks 104, 104. According to this, the disks 104, 104 during braking are
It can be expected that some of the problems such as high temperature and uneven wear will be solved.

[Problems to be solved by the device]

However, even with the disc brake device disclosed in Japanese Utility Model Laid-Open No. 1-117972, it is not possible to sufficiently deal with the recent increase in the speed of railway vehicles. That is, since the material of the disk is an iron-based metal material, there is a limit to increasing the heat capacity only by the method of providing only two disks, and the disk 104 is heated to a high temperature if braking from high speed running continues. It is a matter of course that the state becomes a situation, and of course the above-mentioned problems occur due to the high temperature of the disk 104, and the disk and the caliper must be arranged on both sides of the induction motor main body, respectively. However, there is a problem in that the layout of the disk device is difficult to mount.

The present invention has been made in view of the above circumstances, and improves the configuration of the disc itself and the material thereof to reduce the amount of heat generation, and then to make the device compact and easy to install. At the same time, it is a technical subject to make it possible to surely deal with the high temperature phenomenon even if the high temperature phenomenon occurs during braking from high speed running.

[Means for Solving the Problems]

A specific means for achieving the above technical problem is that a plurality of rotors that rotate together with the rotary shaft and are slidable in the axial direction are provided at the end of the rotary shaft that is connected to the axle of the railway vehicle. Members, a plurality of stator members arranged between the rotor members and attached to the key member slidably only in the axial direction, a pressing member for applying a braking force to the rotor member and the stator member, A metal ring plate having a large number of pores is provided on the circumference between the outer circumference of the rotor member and the stator member and the case member, and the metal ring plate. And forming a passage chamber on the circumference between the case member and the case member,
A discharge chamber for accumulating dust is provided below the passage chamber.

[Action]

According to the above means, the multi-disc type disc brake device is
When no braking force is applied by the pressing member, the plurality of rotor members that rotate together with the rotating shaft that is connected to the axle of the railway vehicle freely rotate with respect to the plurality of stator members attached to the key member. On the other hand, on the other hand, when the braking force is applied by the pressing member, the rotor member and the stator member are slid to one side in the axial direction and are pushed together, so that the respective members are in pressure contact with each other. Occurrence of friction prevents the rotor member from rotating relative to the stator member. That is, since the stator member can slide only in the axial direction by the key member,
When the relative rotation of the rotor member with respect to the stator member is blocked as described above, the rotation of the axle connected to the rotating shaft that rotates with the rotor member, and thus the wheel, stops.

Further, the present invention employs a multi-plate type disc brake device including a plurality of rotor members, a plurality of stator members, and a pressing member in a railway vehicle, so that heat generated when the vehicle is braked at high speed is applied. Is dispersed in the frictional heat between each of the plurality of rotor members and the stator members, so that not only the amount of heat generated by each member is significantly reduced, but also the ease of installation and the compactness of the device are reduced. Will be planned.

Further, a metal ring plate having a large number of pores is provided on the circumference between the outer circumference of the rotor member and the stator member and the case member, and the metal ring plate is provided on the circumference between the metal ring plate and the case member. Since the passage chamber is formed and the discharge chamber for accumulating dust is provided in the lower part of this passage chamber, the dust generated by friction between the rotor member and the stator member during braking escapes from the pores of the metal ring plate. Then, it can be taken out by being guided from the passage chamber to the discharge chamber. This allows the rotor member and / or the stator member to have a material with good conductivity (for example, metal or C /
In the case of C composite), various harmful effects on peripheral devices due to dust scattering (for example, short circuit of electric motor)
Will be prevented in advance.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

First, the mounting state of the disc brake device 1 according to the present invention will be described based on the schematic configuration shown in FIG. 1. Below the bogie 52 that supports the vehicle body 51 via the air springs 50, 50 is a driving motor. 2 is attached, and a drive gear 4 fixed to one end of a rotor shaft 3 of the driving electric motor 2 and a driven gear 6 fixed to an axle 5 supporting the wheels 53, 53 are meshed with each other. At the same time, the disc brake device 1 according to the present invention is attached to the end portion (left end portion) on the side opposite to the gear of the drive motor 2. Therefore, when the vehicle is running, the rotation of the rotor shaft 3 of the drive motor 2 is transmitted to the axle 5 and the wheels 53, 53 via the drive gear 4 and the driven gear 6, while the brake command is issued. At times, the rotation of the rotor shaft 3 is stopped by the operation of the disc brake device 1, and accordingly, the rotation of the axle 5 and the wheels 53, 53 is stopped, so that the braking action is performed. Axle springs 55, 55 are provided between the dolly 52 and the axle cases 54, 54 that rotatably hold the axle 5 at both ends.

Next, the detailed structure of the disc brake device 1 will be described with reference to FIGS. 2 and 8.

The disc brake device 1 has a drum-shaped case member 7 fixed to the opposite end of the drive motor 2 by means of bolts 56, 56, and a plurality of case members 7 are provided on the inner peripheral surface of the case member 7. 8 is fixed, and a hollow shaft 9 coupled to the rotor shaft 3 of the drive motor 2 is integrally rotated with the rotor shaft 3 at the inner center of the case member 7. Held possible. Then, two rotor members 10, 10 which rotate together with the hollow shaft 9 and by extension the rotor shaft 3 and are slidable in the axial direction (direction a-b in FIG. 3) are attached to the outer periphery of the hollow shaft 9. Further, three stator members 11 which are slidable only in the axial direction are provided on the inner circumference of the key members 8 ...
… 11 is attached. More specifically (see FIG. 2), the hollow shaft 9 is integrally formed with a plurality of ridges 9a ... 9a protruding outward at equal angular intervals along the axial direction. A through hole 10a having the same shape as the outer diameter of the rotor member 10 is formed in the central portion of the rotor member 10 and by fitting them, the rotor member 10 rotates together with the hollow shaft 9 and is slidable in the axial direction. On the other hand, the key members 8 ... 8 are arranged at equal angular intervals and are fixedly supported by the case member 7, and notches having the same shape as the contour of the key members 8 ... 8 at right angles to the axis. 11a ... 11a is the stator member 11
The stator member 11 is slidable only in the axial direction with respect to the key members 8 ... In this case, the rotor member 10
And the stator member 11 are arranged alternately in the axial direction,
There is a slight gap between the outer peripheral surface 10b of the rotor member 10 and the inner peripheral surface of the key members 8 ... 8 and between the inner peripheral surface 11b of the stator member 11 and the outer peripheral surface of the hollow shaft 9. There is. The numbers of the rotor member 10 and the stator member 11 are not limited to those shown in FIG. 3, and may be more or less.

Both the rotor member 10 and the stator member 11F are made of C / C composite. This C / C
Composites (Carbon / Carbon Composites) are carbon fiber / carbon composite materials produced by carbon-bonding and graphitizing heat treatment after carbon-fiber bond strengthening with resin, pitch, or the like. As shown in FIG. 4, the temperature characteristic of steel is C / C while the characteristic curve of steel is indicated by reference numeral (a).
The composite has a characteristic curve indicated by a symbol (b). That is, the C / C composite has a tensile strength that is the same as or higher than room temperature even when it is in a high temperature state. In addition to these, the properties of the C / C composite include light weight, high elasticity, a fine structure with little anisotropy, excellent slidability and wear resistance.

Further, as shown in FIG. 3, a ring-shaped pressure plate 12 made of a metal material having high thermal strength and conductivity is arranged in the vicinity of the left side of the stator member 11 arranged at the left end. As shown in FIG. 5, the pressure plate 12 is provided with an insertion hole 12a for inserting the hollow shaft 9 in the center thereof, and the stator member 1
The side surface facing 1 is formed flat, and the side surface opposite to the stator member 11, that is, the outer surface on the case member 7 side, has a radial passage extending from the position slightly spaced from the insertion hole 12a toward the outer peripheral direction. A large number of grooves 12b and protrusions 12c are alternately provided. A plurality of key holes 12d into which the key member 8 is fitted are formed at a predetermined pitch on the outer circumference, and flat portions 12e and 12f are formed at a predetermined pitch on the protrusion 12c.
Of these, the flat portion 12e is provided with a hole portion 12g into which the piston rod 21 of the gap adjusting mechanism 19 is fitted. The pressure plate 12 is slidable in the axial direction by fitting the insertion hole 12a into the hollow shaft 9 and the key member 8 into the key hole 12d in the same manner as the stator member 11. It is fitted. A ring-shaped stopper plate 13 made of the same metal material as that of the pressure plate 12 is arranged on the right side of the stator member 11 arranged at the right end of the above members. This stopper plate 13
As shown in FIG. 6, an insertion hole 13a for inserting the hollow shaft 9 is provided in the central portion, a side surface facing the stator member 11 is formed flat, and a side surface opposite to the stator member 11, that is, a case. On the outer surface of the member 7 side, passage grooves are formed radially from the position slightly spaced from the insertion hole 13a toward the outer peripheral direction.
Many 13b and protrusions 13c are provided alternately. Further, a plurality of key holes 13d into which the key members 8 are fitted are formed on the outer periphery thereof at a predetermined pitch. The stopper plate 13 has a hollow shaft 9 into which an insertion hole 13a is fitted, so that the groove 1
The outer surface provided with 3b and the protrusion 13c is the right side wall 7a of the case member 7.
By being firmly fixed to the key members 8 ... 8 while being in contact with the inner surface, a plurality of radially extending groove 13b and projection 13c are provided between the inner surface of the right side wall 7a of the case member 7 and the stopper plate 13. The slits 14 ... 14 are formed radially.

On the other hand, on the left side wall 7b of the case member 7, a plurality of pistons (pressing members) 15 ... 15 whose tips abut against the flat portion 12f of the pressure plate 12 are slidably fitted in the axial direction. It is held and hydraulic pressure (hydraulic pressure) is applied to the rear surface of the piston 15.
And a hydraulic chamber 16 for operating
16 is a hydraulic pressure supply port 18 through a hydraulic pressure passage 17 as shown in FIG.
(Communication with hydraulic pressure source).

Further, the left side wall portion 7b of the case member 7 is provided with a plurality of gap adjusting mechanisms 19 ... This gap adjustment mechanism 19
As shown in FIG. 3, the piston rod 21 is urged to the left by the compression coil spring 20 and the piston rod 21.
Stopper plate 22 that contacts the stepped surface of and regulates its left movement
And a friction ring 24 that restricts the right movement of the retainer 23 fixed to the stopper plate 22. The right end of the piston rod 21 is fixed to a hole 12g provided in the flat portion 12e of the pressure plate 12, and therefore the pressure plate 12 is moved from the stator member 11 to the left by the compression coil spring 20. It is in a state of being urged away.
Further, the friction ring 24 moves left and right when a force equal to or greater than a predetermined force is applied, and in accordance with the left and right movement, the flange member 25 fitted to the piston rod 21 and the retainer.
The gap X between the gap 23 and 23, that is, the moving range of the piston rod 21 is changed.

According to the above configuration, when the vehicle is traveling, the hollow shaft 9 and the rotor members 10 and 10 rotate as the rotor shaft 3 of the drive motor 2 rotates, but in this case,
Since the hydraulic chamber 16 on the rear surface of the piston 15 is in a non-pressurized state, the piston 15 does not generate a force for pressing the pressure plate 12 to the right. The members 11 ... 11 can be freely rotated.
On the other hand, when the brake command is issued, the hydraulic chamber 16
Is in a pressurized state, and accordingly, the piston 15 moves to the right to press the pressing plate 12 and press the rotor members 10, 10 and the stator members 11 ... 11 against the stopper plate 13, which occurs at this time. The friction between the rotor members 10 and 10 and the stator members 11 to 11 causes friction between the rotor members 10 and 1.
As a result, the hollow shaft 9 and the rotor shaft 3 stop rotating. In this case, the amount of heat generated during braking of the vehicle is
Since it is dispersed as frictional heat at a plurality of points generated between the rotor members 10, 10 and the stator members 11, ... 11, the heat generation amount of each of the members 10, 10, 11 ,. It will be reduced. In addition, the rotor member 10, 10
Since the stator members 11 ... 11 are made of C / C composite, even if each of the members 10, 10, 11 ... 11 becomes high temperature during braking from high speed running of the vehicle, C / C composite Since the C composite has high strength under a high temperature condition as indicated by the symbol (b) in FIG. 4, problems such as uneven wear and changes in braking force do not occur. And
When the brake command is released, the pressure plate 12 moves leftward by the spring force of the compression coil spring 20 of the gap adjusting mechanism 19 and returns to the initial position.

The amount of heat generated during braking of the vehicle is the rotor member 10,1.
0 and the stator members 11 ... 11 will store heat,
This amount of heat is suitably radiated by the configuration shown below.

That is, the left end of the inner hole 60 of the hollow shaft 9 is opened, and this opening is formed as an air supply hole 61. A filter 62 is attached to the left side of the air supply hole 61, and the plurality of the plurality of holes are formed. A thin metal ring plate 63 (for example, made of stainless steel) is attached to the key members 8 ... 8 so as to cover the outer peripheral portions of the rotor members 10, 10 and the stator members 11 ... 11 over the entire circumference. The metal ring plate 63 is located between the outer periphery of the rotor member 10 and the stator member 11 and the case member 7,
As shown in the figure, the metal plate is formed in an annular shape, and the rotor member
A large number of pores 63a through which dust generated by friction between 10 and the stator member 11 passes are formed. The one shown in the figure shows a state in which the key member 8 is fixed by the rivets 63b. The air taken in through the air supply hole 61 is a through hole formed at both left and right ends of the hollow shaft 9.
After passing through 64 and 65, as shown by arrows x and y, the slit 14a formed by the gap between the pressure plate 12 and the case left side wall portion 7b, the passage groove 12b of the pressure plate 12 and the protrusion 12c. , And the case right side wall portion 7a formed by the passage groove 13b and the protrusion 13c formed on the outer surface of the stopper plate 13.
Flows into a gap (slit 14) between the metal ring plate 63 and the inner peripheral surface of the case member 7, and passes through a passage chamber 66 formed on the circumference of the metal ring plate 63 and the lower portion of the passage chamber 66. Discharge chamber
The air is discharged to the outside from the air discharge port 68a with the filter 69 provided on the lid member 68 of 67. By passing the cooling air in this way, the pressure plate 12, the stopper plate
Heat is radiated from the 13 and the metal ring plate 63, and the rotor members 10 and 1
0 and the excessive temperature rise of the stator members 11 ... 11 are prevented.

Further, dust generated by friction between the rotor member 10 and the stator member 11 during braking is caused by the fine holes 63a of the metal ring plate 63.
To the passage chamber 66 and accumulates in the discharge chamber 67 due to the presence of the filter 69. To remove this, lid 68
It can be easily taken out by manually opening the knob 68a. In this case, the rotor member
The C / C composite, which is the material of 10 and the stator member 11 (similarly when the rotor member 10 and / or the stator member 11 is made of a metal), has good conductivity, so that dust is scattered and the driving motor 2 If it enters into the interior of the vehicle, it may cause a short circuit or the like. However, if dust is accumulated in the discharge chamber 67 and is not scattered as described above, a short circuit of the drive motor 2 or the like will occur. The problem of does not occur.

Further, in the case where the hollow shaft 9 and the rotor shaft 3 are integral with each other, the heat generated during braking of the vehicle is directly transferred to the bearing, so that the rotor shaft 3 However, this will cause problems such as early damage to the bearings of
In this embodiment, the following configuration is adopted in order to suppress the above heat conduction as much as possible.

That is, as shown in FIG. 8, the hollow shaft 9 and the rotor shaft 3 are formed separately, and a heat insulating coupling 70 is interposed between them. Specifically, a meshing uneven surface 9a is formed on the right end of the hollow shaft 9, and the meshing uneven surface 9a and the meshing uneven surface 70a formed on the left end of the heat insulating coupling 70 are engaged with each other and coupled. In addition, a meshing uneven surface 3b is also formed on the left end of the rotor shaft 3, and the meshing uneven surface 3b and the meshing uneven surface 70b formed at the right end of the heat insulating coupling 70 are meshed and coupled. -ing According to such a configuration, the hollow shaft 9 to the rotor shaft 3
The heat conduction to the vehicle is suitably reduced, and the problem that the temperature of the rotor shaft 3 rises due to the braking of the vehicle is effectively prevented.

[Effect of device]

As described above, according to the present invention, by using a multi-plate type disc brake device having a plurality of rotor members and a plurality of stator members as a railway vehicle braking device, braking of the vehicle is performed. The heat generated at times is dispersed as frictional heat generated at multiple points between the members, and the heat generation amount of each member is reduced, resulting in uneven wear and shortened life. It is possible to avoid such problems, and to obtain the advantages that the device can be made compact and the mountability can be facilitated.

Further, dust generated by friction between the rotor member and the stator member during braking escapes from the pores of the metal ring plate, is guided from the passage chamber to the discharge chamber, and is accumulated there. It will not accumulate in an indefinite place and will not be scattered outside. Due to the dust, when the rotor member and / or the stator member is made of a material having good conductivity, adverse effects on peripheral equipment (for example, short circuit of the electric motor) due to dust scattering are prevented in advance. In addition, since the radiant heat in the circumferential direction generated during braking is shielded by the metal ring plate, it is possible to prevent the strength from being lowered due to the temperature increase of the case member.

[Brief description of drawings]

1 to 8 show an embodiment of the present invention.
FIG. 1 is a schematic front view showing a mounted state of a railway vehicle disc brake device, FIG. 2 is a side view of a longitudinal section of an essential part showing an internal structure of the railway vehicle disc brake device, and FIG. 3 is an inside of the railway vehicle disc brake device. FIG. 4 is a graph showing the characteristics of C / C composite, and FIG.
FIG. 5 is an explanatory view of a pressure plate, FIG. 6 is an explanatory view of a stopper plate, FIG. 7 is a perspective explanatory view of a metal ring plate, and FIG. 8 is a component showing a combined state of a rotor shaft and a hollow shaft. It is an exploded array perspective view. FIG. 9 is a schematic plan view showing one conventional example, and FIG. 10 is a schematic plan view showing another conventional example. 1 ... Disc brake device 3 ... Rotor shaft (rotating shaft) 5 ... Axle 7 ... Case member 8 ... Key member 9 ... Hollow shaft (rotating shaft) 10 ... Rotor member 11 ... Stator member 15 …… Pressing member (piston) 63 …… Metal ring plate 63a …… Pore 66 …… Passage chamber 67 …… Discharge chamber

Claims (1)

[Scope of utility model registration request] 1. A plurality of rotor members, which are rotatable with the rotary shaft and are slidable in the axial direction, at the end of a rotary shaft connected to the axle of a railway vehicle, and between the rotor members. A plurality of stator members slidably attached only to the key member in the axial direction, a pressing member for applying a braking force to the rotor member and the stator member, and a case member including the rotor member and the stator member. A metal ring plate having a large number of pores is provided on the circumference between the outer circumference of the rotor member and the stator member and the case member, and the metal ring plate is provided on the circumference between the metal ring plate and the case member. A disc brake device for a railway vehicle, characterized in that a passage chamber is formed, and an exhaust chamber for accumulating dust is provided in a lower portion of the passage chamber.