JPH06341473A - Multi-disc type brake device - Google Patents

Abstract

PURPOSE:To shorten a cycle to carry out braking work by way of avoiding harmful effects accompanying heat conduction and heat radiation against each of component parts in the circumference by improving a structure of a rotor member and a stator member of a multi-disc type brake device. CONSTITUTION:Either of a stator member 14 and a rotor member 12 projects the extreme outer periphery of a metal plate material interposed between a pair of carbonaceneous plate materials to the outer peripheral side of the outer periphery of the carbonaceneous plate materials and to a position which is an air flowing space in the neighbourhood of an inner part of a case part 1x and where air flow is not avoided by a key member 13. Of the other of the stator member 14 and the rotor member 12, on an inner peripheral part of a metal plate material interposed between a pair of carbonaceneous plate materials, a metal body projected to the outside in the perpendicular direction of the carbonaceneous plate material and making contact with a key part 11a of a shaft part 11 is continuously provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-disc brake device, and more particularly to an improved technique for a rotor member and a stator member which are constituent elements of the brake device.

[0002]

2. Description of the Related Art In recent years, a multi-disk disc brake device has been put into practical use as a brake device for various vehicles. The rotor member and the stator member, which are the constituent elements of this type of brake device, are heat resistant. It must be made of a material with excellent wear resistance and the like. In order to meet such a demand, for example, according to Japanese Utility Model Publication No. 4-23834, a carbon-based composite material has come to be used as a material of a rotor member and a stator member. It is generally known that it can exert a sufficient function up to (about 3000 ° C).

Further, in the detailed structure of the brake device disclosed in the above publication, the case portion is held in a fixed state with respect to the carriage, and the rotary shaft (shaft portion) is rotatably held at the center of the case portion. , The outer peripheral portion of the stator member is engaged with the key member fixed to the case portion, and the inner peripheral portion of the rotor member is engaged with the key portion provided on the rotating shaft, so that the rotation of the driving electric motor is performed by the rotating shaft. Under the condition of being transmitted from the rotor member to the rotor member, the rotor member and the stator member are brought into close contact with each other by the action of the piston to obtain the braking force.

Further, in the brake device disclosed in the above publication, an inner hole is formed in the rotating shaft, and cooling air introduced from the inner hole is circulated in the entire inside of the case portion to contact the rotor member and the stator member. , After that, by discharging into the atmosphere from the discharge hole formed in the wall of the case part,
Care is taken to obtain a cooling effect.

[0005]

However, the carbon-based composite material forming the above-described rotor member and stator member has the characteristic of extremely low thermal conductivity, and both members are Since it is in a lump state, a large amount of frictional heat generated between the two during braking is accumulated inside, and the degree of heat escape is extremely small. There is a problem of high temperature. This kind of problem becomes more remarkable if it is considered that the braking action is frequently and repeatedly performed from high speed running in a short cycle as the speed of railway vehicles and the like increases.

In this case, since the rotor member and the stator member themselves are made of a carbon-based composite material, they can withstand use even in an extremely high temperature state as described above, but heat conduction from the rotor member and the stator member, which has accumulated a large amount of heat, Each peripheral component affected by heat radiation, for example, a piston for pressing the rotor member and the stator member, a packing for keeping airtightness thereof, or a bearing of a rotary shaft with which the rotor member engages, even if a slight temperature rise occurs. There is a problem that durability is markedly deteriorated due to early wear and strength reduction.

Further, in the above-mentioned carbon-based composite material, in a high temperature atmosphere (about 600 ° C. or higher), carbon as a constituent material thereof reacts with oxygen in the air to cause an oxidation phenomenon (weathering phenomenon). It has a characteristic that the strength of the reaction portion is deteriorated or eroded. Therefore, as disclosed in the above publication, even if the cooling air is circulated inside the case portion to directly contact the rotor member and the stator member, in consideration of the oxidation phenomenon, the cooling air to be contacted is There is a problem that the amount is limited and a sufficient cooling effect cannot be obtained.

The present invention has been made in view of the above circumstances. By improving the structure of the rotor member and the stator member, the oxidation phenomenon is prevented and sufficient heat is radiated from both members. Therefore, it is a technical subject to avoid the adverse effects of heat conduction and heat radiation to the surrounding components.

[0009]

The multi-disc brake device according to the present invention is characterized in that it is constructed as follows in order to achieve the above technical problems. That is, the first
The invention is characterized in that a rotor member rotatable with traveling of the vehicle and a non-rotatable stator member disposed adjacent to the rotor member are in close contact with each other to obtain a braking force. A multi-plate disk configured such that the key member on the case portion side engages with the outer peripheral portion of one of the rotor member and the stator member, and the key portion on the shaft portion side engages with the inner peripheral portion of the other one. In the braking device,
In either one of the rotor member and the stator member, both sides of a metal plate material are sandwiched by plate materials made of carbon-based composite material, and the outermost peripheral edge of the metal plate material is more outer than the outer peripheral edge of the plate material made of carbon-based composite material. It is configured so as to project to the side and to the outer peripheral side up to a position where the air circulation is formed near the inner surface of the case portion and the air circulation is not obstructed by the key member.

Further, a feature of the second invention is that in the multi-disc disc brake device having the same constitution as described above, one of the rotor member and the stator member is a plate material made of carbon composite material on both sides of a metal plate material. And a metal body that protrudes to the outside in the thickness direction of the plate made of the carbon-based composite material and that abuts on the key portion on the shaft portion side while being sandwiched between Is.

[0011]

According to the first aspect of the present invention, in the brake device of the type in which the rotation is transmitted to the shaft portion and the case portion is fixed as the vehicle travels, the outer peripheral portion of the key member on the case portion side is While the target is the engaged stator member, the rotation of the vehicle is transmitted to the case portion as the vehicle travels and the shaft portion is fixed. It is intended for a rotor member whose outer peripheral portion is engaged with the key member. Then, the target stator member (rotor member) is
A metal plate material having a high thermal conductivity is interposed in a plate material made of a carbon-based composite material having a low heat conductivity, and the outermost peripheral edge of the metal plate material is formed near the inner surface of the case part. Since it projects to the air circulation space, and to the position where the air circulation is not obstructed by the key member in this space, the metal plate always contacts the cooling air flowing in the air circulation space without staying. Become.
As a result, the frictional heat stored in the stator member (rotor member) due to the braking action is dissipated through the metal plate material inside, and this metal plate material is appropriately cooled by the cooling air. Further, the outermost peripheral edge of the metal plate material is projected to the outer peripheral side than the plate material made of the carbon-based composite material, and therefore, it is always in contact with the cooling air flowing without staying in the air circulation space because it is the outermost part of the metal plate material. Only at the peripheral portion, the plate material made of the carbon-based composite material does not come into contact with the positive flow of the cooling air as described above, and thereby the oxidation phenomenon can be effectively prevented from occurring.

The second aspect of the present invention is a brake device of a type in which rotation is transmitted to a shaft portion and a case portion is fixed as a vehicle travels, and a key portion on the shaft portion side has an inner peripheral portion thereof. Is intended for the rotor member to be engaged with, while the shaft portion is fixed for the brake device of the type in which rotation is transmitted to the case portion and the shaft portion is fixed as the vehicle travels. The object is a stator member whose inner peripheral portion is engaged with the side key portion. The target rotor member (stator member) is such that a metal plate material having a high heat conductivity is interposed in a plate material made of a carbon-based composite material having a low heat conductivity as in the case described above. In addition, since the metal body that abuts the key portion on the shaft portion side is connected to the inner peripheral portion of the metal plate member, the friction heat accumulated in the rotor member (stator member) due to the braking action is accumulated. Is radiated from the metal plate through the metal body to the shaft portion. Further, since the metal body projects outward in the thickness direction of the plate material made of a carbon-based composite material and has a large contact area with the shaft portion, when the metal plate and hence the metal body radiates heat to the shaft portion. As a result, the heat radiation area of is increased, and a sufficient cooling effect can be obtained.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a multi-disk disc brake device according to the present invention will be described below with reference to the drawings. FIG. 1 is a schematic plan view showing an example of an installation state of a multi-disc brake device 1 according to the present invention, in which two drive motors 3, 3 are symmetrically attached below a bogie frame 2. , A multi-disc disc brake device at each end of these electric motors 3, 3.
1, 1 are connected in series, and clutch means 4, 4 are interposed between the main bodies 1a, 1a of these brake devices 1, 1 and the electric motors 3, 3. Output shaft (rotary drive shaft) of each motor 3,3
The gears 5, 5 are connected to the axles 7, 7 and by extension the wheels 8 ... 8 via gear transmissions 6a, 6a in the gear cases 6,6.

FIG. 2 shows the internal structure of each multi-disc brake device 1. The left part of the multi-disc brake device 1 constitutes a main body 1a for performing a braking action, and the right part thereof constitutes a clutch means 4. There is.

The main body 1a in this embodiment is divided into two left and right positions in order to enhance the cooling effect. Both of these structures are fitted and fixed with a gap on the outer periphery of the hollow shaft 10. 11a, a plurality of key portions 11a ... 11a formed on the outer circumference of the tubular shaft 11 so as to project at equal angular intervals, and an inner peripheral portion of the key portions 11a.
An annular rotor member 12, 12 rotating together with 10, and a plurality of key members 13 fixed to the main body case 1x at equal angular intervals on the outer peripheral side of the rotor member 12, 12 with a gap therebetween. 13, a non-rotatable annular stator member 14 ... 14 whose outer peripheral portions are engaged with these key members 13 ... 13, and a hydraulically actuated type which causes the rotor member 12 and the stator member 14 to come into close contact with each other (or Pneumatically operated piston 15).

The clutch means 4 has a synchromesh type structure and holds a fork 17 movably from side to side on a guide shaft 16 fixed to the clutch case 1c, and is engaged with the fork 17 to move left and right. Possible switching internal gear
18 and a driven external gear 19 to which the hollow shaft 10 is fitted and fixed.
And a drive external gear 21 to which a rotary drive shaft 20 (connected to the output shaft 5) of the electric motor 3 is fixedly fitted, and an intermediate clutch external gear that synchronizes the rotations of the external gears 19 and 21. 22 and 22. When the switching internal gear 18 is located at the left end as shown in the figure, the rotation is not transmitted from the rotary drive shaft 20 of the electric motor 3 to the hollow shaft 10 and thus to the rotor members 12 ... When the switching internal tooth gear 18 meshes with the driven external tooth gear 19, the intermediate clutch external tooth gear 22, and the driving external tooth gear 21 by the tooth gear 18 moving to the right as the fork 17 moves. The rotation is transmitted from the rotary drive shaft 20 to the hollow shaft 10 and further to the rotor members 12 ... 12, and only when this rotation is transmitted, the rotor member 12 and the stator member 14 are brought into close contact with each other by the action of the piston 15 and a braking action is exerted. Done.

As shown in FIG. 3, the plurality of pistons 15 (four in the illustrated example) are arranged at equal angular intervals on the left end wall 1y of the main body case 1x (the same applies to the partition wall 1z at the center). The hydraulic pressure introduced from the hydraulic oil supply port 15A acts on each piston 15 ... 15 via each communication passage 15B ... 15B. The symbol P shown in the figure is a plug for bleeding air.

The detailed structure of the stator member 14 (the central stator member 14 in FIG. 2) is as shown in FIG.
The key member 13 is provided at multiple locations (six locations in the example) on the outer periphery.
And is made of a plate material (hereinafter referred to as a carbon plate material) 25 made of a carbon-based composite material and a metal plate material 26 made of a metal, preferably copper. The outermost peripheral edges 26w ... 26w of the metal plate material 26 project more outward than the outer peripheral edges 25w ... 25w of the carbon-based plate material 25. Further, the outermost peripheral edge 26w ... 26w of the metal plate material 26 is the main body case 1x.
It protrudes to a position that is an air circulation space AR formed in the vicinity of the inner surface part of the and does not hinder the air circulation by the key members 13 ... Therefore, in this embodiment, the metal plate material
The outermost peripheral edges 26w ... 26w of 26 project more outward than the outer side surfaces of the key members 13 ...

As shown in FIG. 5, the metal plate member 26 is an intermediate metal plate member 26 interposed between two carbon plate members 25, 25.
a and outer metal plate members 26b ... 26b attached to only the outer peripheral portions on both outer sides of the carbon-based plate members 25, 25. Then, as shown in FIG. 6, the outermost peripheral edges 26w, ... 26w of the two plate members 26a, 26b, 26b have substantially the same shape and project as described above.

Further, as shown in FIG. 6, an engaging metal fitting 27 is provided at an engaging portion of the stator member 14 with the key member 13.
The metal plate members 26a, 26b, 26b and the carbon plate members 25, 25 are attached to each other at the bent portions 27 on both sides of the engaging fitting 27.
It is sandwiched between x and 27x and fixed by pin members 28 and 28. Further, as shown in FIGS. 6 and 7, each plate member 25, 25, 26a, 26b, 26b is firmly fixed by the reinforcing member 29 and the pin member 30 provided on the outer peripheral portion of the stator member 14. It is in the state of being

On the other hand, the detailed structure of the rotor member 12 is, as shown in FIGS. 8 and 9, between two carbon-based plate members 31, 31, two metals in a polymerized state, preferably a metal made of copper. Plate material
32,33 are provided, and the carbon-based plate materials 31,31
34 is attached with a plurality of metal bodies 34 ... 34 protruding to both outer sides in the thickness direction. And this metal body 34 ... 34
A key portion 11a of a cylindrical shaft (shaft portion) 11 that is continuously provided (contacted) with the metal plate members 32 and 33 and is fitted and fixed to the hollow shaft 10.
Is engaged with.

As shown in FIG. 10, the metal body 34 is of an H-shape for holding the convex portion 12a formed on the inner peripheral portion of the rotor member 12, and the metal body 34 and the pin member 35 are connected to each other. Thus, the inner peripheral portion of the rotor member 12 is firmly fixed. As for the outer peripheral portion of the rotor member 12, as shown in FIG. 11, the outer peripheral edge portion of the carbon-based plate material 31, 31 is partially thin-walled portion 31a,
31a, and the outer peripheral edge portions 32a, 33a of the metal plate members 32, 33 project toward the outer peripheral side of the carbon plate members 31, 31 and are bent toward both sides, and are firmly fixed by the pin members 36. .

As shown in FIG. 12, the two metal plate members 32 and 33 have rib portions 32x and 33x extending radially at equal angular intervals, and both of the rib portions 32x and 33x have gaps 32s and 33s. However, the positions of these gaps 32s and 33s are different from each other in the radial direction for every other metal plate member 32, 33, and one metal plate member 32 is different from the other metal plate member 32 in the radial direction. The gaps 32s and 33s are also displaced in the radial direction in the rib portion at the same location as the other metal plate member 33. This allows
Since the two metal plate members 32 and 33 can be reliably brought into contact with each other and the thermal expansion in the radial direction can be appropriately absorbed, their bending deformation and twisting deformation due to heat can be prevented.

Further, in this brake device 1, in order to enhance the cooling effect, as shown in FIG. 2, air introduction ports 50, 50 for forcibly introducing cooling air into two positions of the brake device body 1a. Are formed. This air inlet 50
As shown in FIG. 13, a dust (filter) 51 for preventing the inflow of foreign matters such as dust is attached to the outer end of the air intake port 50. The air inlet port 50 is provided on the floor surface of the vehicle body. A blower pipe 52 for connecting cooling air forcedly supplied by an existing fan (not shown) is connected.
Then, the cooling air guided from the air inlet 50 flows into the periphery of the rotor member 12 and the stator member 14 as indicated by the arrow X and, at the same time, also flows into the periphery of the clutch means 4 as indicated by the arrow Y. , Then the outlets 53,5 shown in FIG.
It is discharged from the outside. Therefore, in this embodiment, the cooling air is forcibly fed from the outside to the air circulation space AR in the vicinity of the inner surface portion of the main body case portion 1x.

According to the above-mentioned structure, the frictional heat generated by the rotor member 12 and the stator member 14 which are brought into close contact with each other during the braking action and are stored therein is quickly radiated as follows. .

That is, regarding the stator member 14, a large amount of heat on the entire surface of the carbon-based plate members 25, 25 causes the intermediate metal plate member 26.
In the cooling air flowing through the air distribution space AR near the inner surface of the main body case 1x from the outermost peripheral edge 26w of the plate 26a and the outermost peripheral edges 26w, 26w of the outer metal plates 26b, 26b after being conducted to a. Is radiated to. In this case, the cooling air flowing through the air circulation space AR may be forcedly fed as described above, or may be naturally introduced.

On the other hand, in the rotor member 12, after a large amount of heat on the entire surface of the carbon-based plate materials 31, 31 is conducted from the metal plate materials 32, 33 to the metal body 34 in the inner peripheral portion, the rotor member 12 contacts the metal body 34. The heat is radiated to the cylindrical shaft 11 and the hollow shaft 10 that are installed. in this case,
Cooling air is naturally introduced from the atmosphere into the inner hole of the hollow shaft 10 or is forcibly fed, so that heat is appropriately radiated from the metal body 34 to the hollow shaft 10.

14 and 15 show the results of an experiment conducted to confirm the effect of the above-mentioned embodiment. FIG. 14 shows that the metal plate material (copper plate) 26a is interposed as in the above-mentioned embodiment. 15 shows the temperature distribution characteristics of the stator member 14 of FIG. 15, whereas FIG. 15 shows the temperature distribution characteristics of a conventional stator member composed of only a carbon-based plate material. The right end corresponds to the outer peripheral end of the stator member, and the left end corresponds to the inner peripheral end of the stator member.
According to this experimental result, in the conventional one, the region of 390 ° C or higher occupies more than half, and the temperature distribution has a large deviation, whereas in the above example, the region of 390 ° C or higher is It is narrow and the temperature distribution is uniform, and it is clear that the heat storage amount as a whole is significantly reduced.

In the above embodiment, the present invention is applied to a multi-disc disc brake device of the type that is divided into two positions, but a multi-disc disc brake device of the type that is not divided in this way is used. The present invention can be similarly applied to the above. Further, in the above embodiment, the present invention is applied to a multi-disc brake device of the type in which the key members 13 ... 13 are fixed to the main body case portion 1x in the fixed state and the stator member 14 is engaged with these. , Besides this,
For example, the present invention can be similarly applied to a multi-plate disc brake device of a type in which a portion corresponding to the main body case portion 1x is rotated and the rotor member 12 is engaged therewith, but in this case, Rotor member 12 and stator member
It is necessary to reverse the configuration of 14 and that of the above example.

[0030]

Since the multi-disk disc brake device according to the present invention is configured as described above, it has the following effects. That is, according to the multi-plate disc brake device of the first aspect, in either one of the stator member and the rotor member, a carbon plate material having a low heat conductivity is provided with a metal plate material having a high heat conductivity. In addition, the outermost peripheral edge of the metal plate material is projected from the outer peripheral edge of the carbon-based plate material, and the air flow is obstructed by the key member in the air flow space formed near the inner surface of the case part. Since it protrudes to a position where it is not heated, the metal plate material is always in contact with the cooling air flowing without staying in the air circulation space, and as a result, the heat is accumulated in the stator member or the rotor member along with the braking action. A large amount of frictional heat is dissipated in the circulating air through the metal plate material inside,
The temperature of the stator member or the rotor member itself drops in a short time. Therefore, even if the period of performing the braking action is shortened, the temperature does not cumulatively rise, and it becomes possible to frequently apply the brake from the high speed running of the vehicle. Also,
The strong flow of cooling air in the air circulation space comes into contact only with the outermost peripheral edge of the metal plate, and the plate made of carbon-based composite material does not touch the strong flow of cooling air, which causes oxidation. Can be effectively prevented.

On the other hand, according to the multi-disk disc brake device of the second aspect, either one of the rotor member and the stator member conducts heat into the carbon-based plate material having a low thermal conductivity as in the above case. In addition to interposing a metal plate material having a high rate, a metal body that protrudes outward in the thickness direction of the carbon-based plate material and abuts on the key portion on the shaft portion side is continuously provided on the inner peripheral portion of the metal plate material. Therefore, the frictional heat accumulated in the rotor member or the stator member during the braking action is transferred from the metal plate through the metal body having a large heat radiation area and is radiated in a large amount to the shaft portion. It becomes possible to shorten the cycle of performing the braking action.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing an arrangement state of a multi-disc brake device according to the present invention.

FIG. 2 is a semi-longitudinal front view showing the internal structure of the multi-disc brake device.

FIG. 3 is a left side view of the multi-disc brake device.

FIG. 4 is a side view showing a stator member that is a component of the multi-disc brake device.

5 is a cross-sectional plan view taken along the line AA of FIG.

FIG. 6 is an enlarged perspective view of an essential part showing the structure of the outer peripheral portion of the stator member.

7 is an enlarged cross-sectional plan view of an essential part taken along line BB in FIG.

FIG. 8 is a side view showing a rotor member that is a component of the multi-disc brake device.

9 is a cross-sectional plan view taken along the line CC of FIG.

FIG. 10 is an enlarged perspective view of an essential part showing the structure of the inner peripheral portion of the rotor member.

FIG. 11 is an enlarged cross-sectional plan view of an essential part showing the internal structure of the rotor member.

FIG. 12 is a side view of essential parts showing a metal plate material that is a component of the rotor member.

FIG. 13 is an enlarged vertical cross-sectional front view of essential parts showing a cooling air passage structure of the multi-disc brake device.

FIG. 14 is a schematic diagram showing a temperature distribution characteristic of the stator member.

FIG. 15 is a schematic diagram showing a temperature distribution characteristic of a conventional stator member.

[Explanation of symbols]

 1 Multi-disc Disc Brake Device 1x Case Part (Main Body Case Part) 10 Shaft Part (Hollow Shaft) 11 Shaft Part (Cylinder Shaft) 11a Key Part 13 Key Member 12 Rotor Member 14 Stator Member 25 Carbon Plate Material 26 Metal Plate Material 26a Metal Plate Material (Intermediate metal plate material) 26w Outermost peripheral edge 31 Carbon-based plate material 32 Metal plate material 33 Metal plate material 34 Metal body

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideo Tamamori Hideo Tamamori 3-10-15 Suzuran Tainan-cho, Kita-ku, Kobe-shi, Hyogo (72) Inventor Hideki Hayada 39 of 1261, Kitano, Kakogawa-shi, Hyogo

Claims (2)

[Claims] 1. A braking force is obtained by closely contacting a rotor member rotatable with the running of a vehicle and a non-rotatable stator member arranged adjacent to the rotor member, A multi-disc brake in which one of the rotor member and the stator member is engaged with the key member on the case portion side and the other inner peripheral portion is engaged with the key member on the shaft portion side. In the apparatus, one of the rotor member and the stator member sandwiches both sides of a metal plate material with a plate material made of a carbon-based composite material, and the outermost peripheral edge of the metal plate material is an outer peripheral edge of the plate material made of a carbon-based composite material. And an air circulation space formed in the vicinity of the inner surface of the case portion and further protruded to the outer peripheral side to a position where the air circulation is not obstructed by the key member. Multi-disc braking device, characterized in that there. 2. A braking force is obtained by closely contacting a rotor member rotatable with the running of a vehicle and a non-rotatable stator member arranged adjacent to the rotor member, A multi-disc brake in which one of the rotor member and the stator member is engaged with the key portion on the shaft portion side, and the other outer peripheral portion is engaged with the key member on the case portion side. In the device, one of the rotor member and the stator member sandwiches both sides of a metal plate material with a plate material made of a carbon-based composite material, and the thickness of the plate material made of the carbon-based composite material is provided on an inner peripheral portion of the metal plate material. A multi-disk disc brake device, characterized in that it is formed by continuously providing a metal body that projects outward in the direction and contacts the key portion on the shaft portion side.