JP2867101B2 - Multi disc brake device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art In recent years, a multi-disc disc brake device has been put to practical use as a brake device for various kinds of vehicles. However, a rotor member and a stator member, which are components of such a brake device, have heat resistance. It must be made of a material with excellent abrasion resistance and the like. In order to respond to such a demand, for example, according to Japanese Utility Model Application Laid-Open No. 4-23834, a carbon-based composite material has been used as a material for the rotor member and the stator member. (About 3000 ° C), it is generally known that a sufficient function can be exhibited.

Further, in the detailed structure of the brake device disclosed in the publication, a case portion is held in a fixed state with respect to a bogie, and a rotating shaft (shaft portion) is rotatably held at the center of the case portion. An outer peripheral portion of the stator member is engaged with a key member fixed to the case portion, and an inner peripheral portion of the rotor member is engaged with a key portion provided on the rotating shaft, so that the rotation of the driving motor rotates the rotating shaft. In this state, the rotor member and the stator member are brought into close contact with each other by the action of the piston under the condition where the braking force is transmitted to the rotor member, thereby obtaining a braking force.

Further, in the brake device disclosed in the publication, an inner hole is formed in the rotating shaft, and cooling air introduced from the inner hole is caused to flow through the entire interior of the case portion to contact the rotor member and the stator member. After that, by discharging to the atmosphere from the discharge hole formed in the wall of the case part,
Care has been taken to achieve a cooling effect.

[0005]

However, the carbon-based composite material constituting the rotor member and the stator member exemplified above has a characteristic that the thermal conductivity is extremely low. Since it is in a lump state, a large amount of frictional heat generated between the two during the braking action is stored therein, and the degree of heat dissipation is extremely small, and as a result, the entire brake device is extremely There is a problem of high temperature. This kind of problem becomes even more remarkable in view of the current situation in which it is necessary to repeatedly and frequently perform a braking action in a short cycle from high-speed running with the increase in speed of railway vehicles and the like.

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. However, heat conduction from the rotor member and the stator member storing a large amount of heat and Peripheral components affected by heat radiation, such as a piston for pressing a rotor member and a stator member, a packing for hermetic sealing thereof, or a bearing of a rotating shaft with which the rotor member is engaged, even if the temperature is slightly increased. There is a problem that early wear and strength decrease occur, and durability is remarkably reduced.

In a high-temperature atmosphere (above about 600 ° C.), the carbon-based composite material reacts with oxygen in the air to cause an oxidation phenomenon (weathering phenomenon). It has the property that the strength of the reaction part is deteriorated or eroded. For this reason, as disclosed in the above-mentioned publication, even if the cooling air is allowed to flow through the inside of the case portion to make direct contact with the rotor member and the stator member, considering the oxidation phenomenon, the cooling air to be brought into contact with the rotor member and the stator member is considered. 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, and by improving the structures of the rotor member and the stator member, it is possible to prevent the oxidation phenomenon and sufficiently release heat from both members. Another object of the present invention is to avoid the adverse effects of heat conduction and heat radiation on the surrounding components.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned technical object, a multi-disc brake apparatus according to the present invention is configured as follows. That is, the first
The feature of the invention of the present invention is that a rotor member rotatable as the vehicle travels and a non-rotatable stator member disposed adjacent to the rotor member are brought into close contact with each other to obtain a braking force, A multi-plate disc configured such that a key member on a case portion side is engaged with an outer peripheral portion of one of the rotor member and the stator member, and a key portion on a shaft portion side is engaged with the other inner peripheral portion. In the brake device,
One of the rotor member and the stator member has both sides of a metal plate sandwiched between plates made of a carbon-based composite material, and the outermost peripheral edge of the metal plate is more outer than the outer periphery of the plate made of a carbon-based composite material. And is formed between the inner surface of the case portion and the outer peripheral surface of the key member.
It is configured to protrude into the cooling air circulation space.

According to a second aspect of the present invention, there is provided a multi-disc disc brake device having the same structure as described above, wherein one of the rotor member and the stator member has a metal plate formed on both sides of a carbon composite material. A metal body that protrudes outward in the thickness direction of the carbon-based composite material and is in surface contact with the key portion on the shaft portion side is continuously provided on the inner peripheral portion of the metal plate material. It is configured.

[0011]

The first aspect of the present invention relates to a brake device of a type in which rotation is transmitted to a shaft portion as a vehicle travels and a case portion is fixed, and a key member on the case portion side has an outer peripheral portion provided on a key member. In the case of a brake device of a type in which rotation is transmitted to a case portion as the vehicle travels and the shaft portion is fixed, while the stator member to be engaged is targeted, the case portion side And a rotor member whose outer peripheral portion is engaged with the key member. The target stator member (rotor member) is
A metal plate having a high thermal conductivity is interposed in a plate made of a carbon-based composite material having a low thermal conductivity, and the outermost peripheral edge of the metal plate is formed between an inner surface of a case portion and the key member. Outside
Since the metal plate protrudes to the cooling air flow space formed between the cooling air flow space and the peripheral surface, the metal plate material always comes into contact with the cooling air flowing without staying in the cooling air flow space. As a result, the frictional heat stored in the stator member (rotor member) due to the braking action is radiated through the metal plate inside the stator member, and the metal plate is appropriately cooled by the cooling air. In addition, the outermost peripheral edge of the metal plate protrudes outward from the plate made of the carbon-based composite material,
Therefore, only the outermost peripheral portion of the metal plate material is in constant contact with the cooling air flowing without stagnation in the cooling air flow space, and the plate material made of the carbon-based composite material causes the positive cooling air flow as described above. , So that the occurrence of an oxidation phenomenon can be effectively prevented.

The second aspect of the present invention relates to a brake device of a type in which rotation is transmitted to a shaft portion as a vehicle travels and a case portion is fixed, and a key portion on the shaft portion side has an inner peripheral portion thereof. Is intended for a rotor member to be engaged, whereas a brake device of a type in which rotation is transmitted to a case portion as a vehicle travels and a shaft portion is fixed, It is intended for a stator member whose inner peripheral portion is engaged with a key portion on the side. The target rotor member (stator member) has a high thermal conductivity metal plate interposed in a plate made of a carbon-based composite material having low thermal conductivity as in the above case. In addition to the above, since a metal body which is in surface contact with the key portion on the shaft portion side is continuously provided on the inner peripheral portion of the metal plate material, friction stored in the rotor member (stator member) due to the braking action is provided. The heat is radiated from the metal plate to the shaft portion through the metal body. The metal body protrudes outward in the thickness direction of the plate made of the carbon-based composite material and has a large contact area with the shaft portion. Has a large heat radiation area, and a sufficient cooling effect can be obtained.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a multiple 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 multiple disc brake device 1 according to the present invention. Two drive motors 3 are mounted symmetrically below a bogie frame 2. , At each end of these motors 3,3 a multi-disc disc brake device
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, respectively. Output shaft of each motor 3, 3 (rotary drive shaft)
The wheels 5, 5 are connected to the axles 7, 7 and, consequently, the wheels 8 through gear transmission mechanisms 6a, 6a in the gear cases 6, 6, respectively.

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

The main body 1a in this embodiment is divided into two parts at the right and left sides in order to enhance the cooling effect, and the two parts are fitted and fixed with a gap around the outer periphery of the hollow shaft 10. 11a, a plurality of key portions 11a... 11a protruding from the outer periphery of the cylindrical shaft 11 at equal angular intervals, and the inner peripheral portion thereof is engaged with the key portions 11a.
An annular rotor member 12, 12 that rotates together with 10, and a plurality of key members 13, which are arranged at equal angular intervals on the outer peripheral side of the rotor member 12, 12 with a gap therebetween and fixed to the main body case 1x. 13, a non-rotatable annular stator member 14... 14 whose outer peripheral portion is engaged with these key members 13. Pneumatically operated piston 15.

The clutch means 4 has a synchromesh structure, and holds a fork 17 movably on a guide shaft 16 fixed to the clutch case portion 1c. Possible internal gear for switching
And a driven external gear 19 to which the hollow shaft 10 is fitted and fixed.
A drive external gear 21 in which a rotary drive shaft 20 (connected to the output shaft 5) of the electric motor 3 is fitted and fixed; 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 tooth gear 18 moves rightward with the movement of the fork 17, the switching internal gear 18 meshes with the driven external gear 19, the intermediate clutch external gear 22, and the driving external gear 21. In the meantime, the rotation is transmitted from the rotary drive shaft 20 to the hollow shaft 10 and further to the rotor members 12... Only during this rotation transmission, the rotor member 12 and the stator member 14 are brought into close contact with each other due to the action of the piston 15 and a braking action is performed. Done.

As shown in FIG. 3, a plurality of (four in the illustrated example) pistons 15 are equiangularly spaced at the left end wall 1y of the main body case portion 1x (the same applies to the center partition wall 1z). The hydraulic pressure introduced from the hydraulic oil supply port 15A acts on each of the pistons 15 through each of the communication passages 15B. In addition, the code | symbol P shown in the figure is a plug for air release.

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 has a plurality of outer peripheral portions (six in the illustrated example).
The material is composed of a plate material (hereinafter referred to as a carbon-based plate material) 25 made of a carbon-based composite material and a metal plate material 26 made of a metal, preferably copper. The outermost edges 26w... 26w of the metal plate 26 protrude more outward than the outer edges 25w. Further, the outermost peripheral edges 26w... 26w of the metal plate 26
Protrudes through the inner surface portion cooled is formed in the vicinity of the air flow space A AR in and key members 13 ... 13 to a position where air flow is not inhibited. That is, the cooling air circulation space AR is:
Between the inner surface of the body case 1x and the outer surface of the key members 13 ... 13
Is formed. Therefore, in this embodiment, the outermost peripheral edges 26w... 26w of the metal plate 26 protrude more outward than the outer surfaces of the key members 13.

As shown in FIG. 5, the metal plate 26 is an intermediate metal plate 26 interposed between two carbon-based plates 25,25.
a, and outer metal plate members 26b... 26b provided on both outer sides of the carbon-based plate members 25, 25 only on the outer peripheral edge. 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 protrude as described above.

Further, as shown in FIG. 6, an engagement fitting 27 is provided at an engagement portion of the stator member 14 with the key member 13.
Each of the metal plate members 26a, 26b, 26b and the carbon-based plate members 25, 25
x, 27x and fastened by pin members 28, 28. As shown in FIGS. 6 and 7, the plate members 25, 25, 26a, 26b, and 26b are firmly fixed by a reinforcing member 29 and a pin member 30 provided on the outer peripheral portion of the stator member 14. It is in the state that was done.

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. Board
32, 33, and the carbon-based plate material 31, 31
A plurality of metal bodies 34... Protruding from both outer sides in the thickness direction of the body are attached. And this metal body 34 ... 34
A key portion 11a of a cylindrical shaft (shaft portion) 11 that is provided (contacted) with the metal plate members 32 and 33 and that is fitted and fixed to the hollow shaft 10.
Engaged in a shall be in surface contact with the key portion 11a.

As shown in FIG. 10, the metal member 34 has an H-shape for holding the convex portion 12a formed on the inner peripheral portion of the rotor member 12, and the metal member 34 and the pin member 35 As a result, the inner peripheral portion of the rotor member 12 is firmly fixed. Further, as shown in FIG. 11, the outer peripheral edge of the carbon-based plate material 31, 31 is partially thinner in the outer peripheral portion of the rotor member 12.
The outer peripheral edges 32a, 33a of the metal plate members 32, 33 project outward from the carbon-based plate members 31, 31, are bent toward both sides, and are firmly fastened 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 have gaps 32s and 33s in the rib portions 32x and 33x. However, the positions of these gaps 32s, 33s are radially different for every other rib portion of each of the metal plate members 32, 33, and the position of one of the metal plate members 32, 33 is different from that of the other metal plate member 32. The gaps 32 s and 33 s are also shifted in the radial direction at the same rib portion as the other metal plate 33. This allows
After the two metal plate members 32 and 33 are securely brought into contact with each other, the thermal expansion in the radial direction can be appropriately absorbed, and the bending deformation and the torsional deformation due to heat are prevented.

Further, in this brake device 1, in order to enhance the cooling effect, as shown in FIG. 2, air inlets 50, 50 for forcibly introducing cooling air into two positions of the brake device main body 1a. Are formed. This air inlet 50
As shown in FIG. 13, a dust filter (filter) 51 for preventing the inflow of foreign matter such as dust is attached to the outer end of the vehicle. The air inlet 50 is provided on the floor of the vehicle body. A blower tube 52 for feeding cooling air forcedly supplied by an existing fan (not shown) is connected.
The cooling air guided from the air inlet 50 flows around the rotor member 12 and the stator member 14 as shown by the arrow X, and also flows around the clutch means 4 as shown by the arrow Y. And then the outlets 53,5 shown in FIG.
3 to the outside. Therefore, in this embodiment, the cooling air circulation space AR near the inner surface of the main body case portion 1x is provided.
However, cooling air is forcibly supplied from the outside.

According to the above configuration, the frictional heat generated and stored in the rotor member 12 and the stator member 14 due to the close contact between the rotor member 12 and the stator member 14 during the braking operation is quickly radiated as follows. .

That is, with respect to the stator member 14, a large amount of heat over the entire surface of the carbon-based plate members 25, 25 is transferred to the intermediate metal plate member 26.
After being transmitted to the cooling air flowing through the cooling air circulation space AR near the inner surface portion of the main body case portion 1x from the outermost peripheral edge 26w of the plate material 26a and the outermost peripheral edges 26w, 26w of the outer metal plate materials 26b, 26b. Heat is dissipated inside. In this case, the cooling air flowing through the cooling air flow space AR may be forcedly supplied as described above, or may be naturally introduced.

On the other hand, the rotor member 12, after a large amount of heat in the entire surface of the carbon-based sheet 31 is conducted to the metal body 34 of the inner peripheral portion of a metal plate material 32, 33, interview the metal body 34
Heat is dissipated to the cylindrical shaft 11 and the hollow shaft 10 that are in contact . In this case, since the cooling air is spontaneously introduced from the atmosphere or is forcibly supplied to the inner hole of the hollow shaft 10,
Heat radiation from the metal body 34 to the hollow shaft 10 is appropriately performed.

FIGS. 14 and 15 show the results of an experiment conducted to confirm the effects of the above embodiment. FIG. 14 shows a state in which a metal plate (copper plate) 26a is interposed as in the above embodiment. FIG. 15 shows the temperature distribution characteristics of a conventional stator member composed only of a carbon-based plate material, while FIG. 15 shows the temperature distribution characteristics of the stator member 14 of FIG. 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 the experimental results, in the conventional device, the region at 390 ° C. or more occupies more than half and there is a large bias in the temperature distribution. It is clear that the temperature is narrow and the temperature distribution is uniform, and that the total amount of stored heat is significantly reduced.

In the above-described embodiment, the present invention is applied to a multi-disc disc brake device of a type divided and arranged at two positions. The present invention can be similarly applied to Further, in the above embodiment, the present invention is applied to a multi-disc disc brake device of a type in which the key members 13... 13 are fixed to the fixed main body case portion 1x and the stator members 14 are engaged therewith. , Besides this,
For example, the present invention can be similarly applied to a multi-disc disc brake device of a type in which a portion corresponding to the main body case portion 1x rotates and the rotor member 12 is engaged therewith, but in this case, Rotor member 12 and stator member
It is necessary to mutually reverse the configuration of 14 with that of the above example.

[0030]

The multi-disc disc brake device according to the present invention is constructed as described above, and has the following effects. That is, according to the multi-disc brake device of the first aspect, one of the stator member and the rotor member is provided with a metal plate material having a high thermal conductivity interposed in a carbon-based plate material having a low thermal conductivity. In addition to the above, with the outermost peripheral edge of this metal plate protruding from the outer peripheral edge of the carbon-based plate, the inner surface of the case portion and the key portion on the case portion side
Since the metal plate protrudes into the cooling air flow space formed between the cooling air and the material, the metal plate material is always in contact with the cooling air flowing without stagnation in the cooling air flow space. Along with this, the frictional heat stored in the stator member or the rotor member is transmitted to the inside of the metal plate material and is radiated in a large amount into the flowing air, so that the temperature of the stator member or the rotor member itself decreases in a short time. Therefore, even if the period for performing the braking action is shortened, the temperature does not increase cumulatively, and it is possible to frequently apply the brake from high-speed running of the vehicle. In addition, only the outermost peripheral portion of the metal plate comes into contact with the strong flow of the cooling air in the cooling air circulation space, and the plate made of the carbon-based composite material does not come into contact with the strong flow of the cooling air. The occurrence of the phenomenon can be effectively prevented.

On the other hand, according to the multi-disc disc brake device of the second aspect, either one of the rotor member and the stator member has heat conduction in the carbon-based plate material having low heat conductivity as in the above case. In addition to the metal plate having a high ratio being interposed, a metal body that protrudes outward in the thickness direction of the carbon-based plate and comes into surface contact with the key portion on the shaft portion side is continuously provided on the inner peripheral portion of the metal plate. Therefore, the frictional heat stored in the rotor member or the stator member during the braking action is transmitted from the metal plate through the metal body having a large heat dissipation area to a large amount of heat and is radiated to the shaft portion. It is possible to shorten the cycle in which the braking action is performed.

[Brief description of the drawings]

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

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

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

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

FIG. 5 is a cross-sectional plan view taken along line AA of FIG. 4;

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

FIG. 7 is an enlarged cross-sectional plan view of an essential part taken along line BB of FIG. 4;

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

FIG. 9 is a cross-sectional plan view taken along line CC of FIG. 8;

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

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

FIG. 12 is a side view of a main part showing a metal plate material which is a component of the rotor member.

FIG. 13 is an enlarged longitudinal sectional front view of a main part showing a configuration of a cooling air passage of the multi-disk brake device.

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

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Multi-plate disc brake device 1x Case part (body case part) 10 Shaft part (hollow shaft) 11 Shaft part (cylindrical shaft) 11a Key part 13 Key member 12 Rotor member 14 Stator member 25 Carbon-based plate material 26 Metal plate material 26a Metal plate material (Intermediate metal plate material) 26w Outer peripheral edge 31 Carbon-based plate material 32 Metal plate material 33 Metal plate material 34 Metal body

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI B61H 5/00 B61H 5/00 F16D 55/40 F16D 55/40 F (72) Inventor Hideo Tamamo Suzurandaiminami, Kita-ku, Kobe-shi, Hyogo Prefecture 3-10-15, Machi-cho (72) Inventor Hideki Hayata 391, Kitano 1261, Noguchi-cho, Kakogawa-shi, Hyogo (56) References JP-A-49-7662 (JP, A) JP-A-47-7018 (JP, A) Tokuhyo 55-500624 (JP, A) Japanese Utility Model 4-1744 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) F16D 65/12 B60T 1/06 B61H 5 / 00 F16D 55/40

Claims (2)

(57) [Claims] A rotor member rotatable as the vehicle travels, and a non-rotatable stator member disposed adjacent to the rotor member, wherein the rotor member is brought into close contact with each other to obtain a braking force; A multi-disc disc brake configured such that a key member on a case portion is engaged with an outer peripheral portion of one of a rotor member and a stator member, and a key portion on a shaft portion is engaged with an inner peripheral portion of the other. In the apparatus, either one of the rotor member and the stator member sandwiches both sides of a metal plate with a plate made of a carbon-based composite material, and an outermost peripheral edge of the metal plate is formed as an outer peripheral edge of the plate made of a carbon-based composite material. multi, characterized in that it is configured to project the cooling air <br/> air circulation space formed between the outer peripheral surface of the inner surface and the key member and the casing portion projecting on the outer peripheral side than the Board disc Brake system. 2. A braking force is obtained by bringing a rotor member rotatable as the vehicle travels and a non-rotatable stator member disposed adjacent to the rotor member into close contact with each other, A multi-disc disc brake configured such that a key portion on the shaft portion engages with the inner peripheral portion of one of the rotor member and the stator member, and a key member on the case portion side engages with the outer peripheral portion of the other. In the apparatus, either one of the rotor member and the stator member sandwiches both sides of a metal plate with a plate made of a carbon-based composite material, and has a thickness of the plate made of the carbon-based composite material on an inner peripheral portion of the metal plate. A multi-disc disc brake device comprising a metal body protruding outward in the direction and being in surface contact with the key portion on the shaft portion side.