JPH0439148A - Vehicle wheel with tire wheel having brake cooling pipe - Google Patents

Abstract

PURPOSE:To effectively cool a brake section without reducing the strength of a tire wheel by forming the end sections of multiple cooling air guiding pipes arranged in the peripheral direction of a rim section into such a shape that air is guided into the pipes when a vehicle wheel is rotated. CONSTITUTION:A brake section 23 is fitted to a wheel 20, a tire 24 is inserted between extended circular sections 20b1, 20b2 formed on both ends of a rim section 20b, and pipes 21 are bridged on the path from the extended circular section 20b1 nearer to a disk section 20a to nearly the center section of the rim section 20b through the inside of the tire 24. The whole shape of the pipes 21 is inclined by the preset angle so that the maximum quantity of the cooling air can be fed to the brake section 23 when the tire 24 is rotated in the direction P, the shape of the end sections 21 of the pipes 21 protruded from the extended circular section 20b1 is formed so as to suck the outside air into the pipes 21 when the pipes 21 are rotated together with vehicle wheels, and the outside air is guided to a vacant chamber 25 surrounded by the inside of the rim section 20b and the outside of the brake section 23.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a wheel used for an industrial vehicle having a tire wheel with a built-in brake part, and particularly relates to a wheel used for an industrial vehicle having a tire wheel with a built-in brake part. The present invention relates to a tire wheel having means for cooling the brake part by discharging air in a chamber formed by the brake part and the tire wheel to the outside of the tire wheel.

[Prior Art] A conventional means for cooling a brake part in a tire wheel is to introduce cooling air as described in, for example, Japanese Utility Model Publication No. 58-5602 or Japanese Utility Model Application Publication No. 57-111603. Cooling air can be introduced into the brake part by installing a scoop member in the disc part of the tire wheel, as described in Japanese Utility Model Application Publication No. 2-14846. It is known that

FIG. 8 shows a conventional brake cooling structure in which a centrifugal fan is attached to the rim of a tire wheel as a cooling blade.
2b rotates and the vehicle runs, but at this time, the centrifugal fan 03 rotates and air flows toward the tire wheel o in the direction of arrow A.
The flow passes between the rim part 05a of the wheel 04 and the brake drum 06, and then flows through the hole o7 of the disc part 07a of the wheel 04.
d flows radially outward as shown by arrow B. As a result,
Brake drum 06 will be cooled.

Furthermore, FIG. 9 shows a conventional brake cooling structure in which fins are attached to the disc part of the tire wheel as cooling vanes. A fin 3 is provided with the other end protruding inward of the disk portion 2. When the tire wheel 1 rotates while the vehicle is running, cooling air is drawn inward by the fins 3 as shown by arrow C into the disc portion 2, thereby cooling the brake drum 4.

FIG. 10 shows a conventional brake cooling structure in which a scoop member 11 that opens in the running direction of the tire is provided on the disc part 10a of the tire wheel 10. During running, air taken in from the opening of the scoop member 11 is transferred to the brake drum. 1
Cooling is performed by flowing the water toward No. 2.

[Problems to be Solved by the Invention] By the way, the cooling means for the brake section built into the three conventional typical tire wheels described above all introduce cooling air into the brake section from one side, and then introduce cooling air into the brake section. Since it is necessary to exhaust the air to the other side, it is necessary to provide a plurality of vents in the circumferential direction in the disk portion of the tire wheel for the cooling air to flow through. For this reason, in order to ensure that the disc part of the tire wheel has sufficient strength even when a hole is drilled, the thickness of the disc part must be increased or the material of the tire wheel itself must be made of a special material. In some cases, the area or number of openings must be reduced to avoid sacrificing the amount of cooling air so as not to damage the strength of the tire wheel.

Therefore, in order to eliminate the above-mentioned drawbacks of the conventional device, the present invention provides a cooling pipe in the rim portion of the tile wheel.
By introducing cooling air into the brake part side without making any ventilation openings in the disc part, or by discharging air from the brake part side to the outside, brakes can be achieved without reducing the strength of the tire wheel. The purpose is to enable effective cooling of the parts.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a tire wheel consisting of a disk portion and a rim portion, and a brake portion disposed within the rim portion that rotates integrally with the disk portion. In a vehicle wheel in which the rim part has an extended annular part formed at both ends into which a tire can be inserted, one is that the extended annular part near the disc part penetrates into the tire and is inserted into the approximately central part of the rim part. A plurality of pipes for introducing cooling air are provided, which are bridged to the portion extending to the rim part, and are arranged in the circumferential direction of the rim part, and the shape of the end of this pipe that protrudes from the extended annular part is such that air flows into the pipe when the wheel rotates. The second part has a similar pipe, the end of which protrudes from the extended annular part, and is shaped so that air can be discharged from the pipe when the wheel rotates. It consists of three parts, each of which has a structure having both the above-mentioned pipe for introducing cooling air and a pipe from which the cooling air can be discharged.

[Function] The first thing mentioned is that when the wheels rotate, the pipe for introducing cooling air also rotates, and the end shape of the pipe is formed so that external air is taken in as the pipe rotates. The air passes through the pipe, is led out to a cavity surrounded by the rim part and the brake part, and is then discharged out of the wheel toward the side opposite to the disc part. The brake section is cooled by this continuous flow of air.

In the second item, when the wheel rotates, the pipe rotates as a unit, but the end of the pipe is shaped so that it is discharged from the pipe as the pipe rotates, so the rim The air in the chamber surrounded by the brake part and the brake part is discharged to the outside of the tire wheel via a pipe.

Since air is constantly replenished into the cavity from the outside of the wheel on the side opposite to the disc part, the air flow is continuous during rotation of the axle and the brake part is cooled.

The third item listed has both the first pipe for introducing cooling air and the second pipe for discharging air, so when the wheels rotate, the air flows through the pipe for introducing cooling air. The air is taken in and led out through the pipe into a cavity surrounded by the rim part and the brake part, and the air in this cavity is discharged to the outside of the tire wheel through a pipe through which the air can be discharged. This allows the brake section to be cooled continuously and effectively.

[Example] The present invention will be explained below based on FIGS. 1 to 7 (A) and (B).

Figures 1 to 3 (a) and (b) show a first embodiment of the present invention in which a pipe is attached to the rim part to introduce cooling air to the brake part. FIG. 3 is a front sectional view of the wheel as seen from the running direction of the vehicle; FIG. 2 is a side view of the wheel; FIG. Figure (b) shows the shape of the end of the pipe.

First, to explain the first embodiment, a tire wheel 20 consists of a disc part 20a and a rim part 20b, and this wheel 20 has a brake part 2 that rotates integrally with the disc part 20a and a rim part 20b.
3 is installed. The brake portion 23 corresponds to a brake drum when the brake is an inward expansion type brake, but is a disc rotor when the brake is a disc brake.

Extended annular portions 20 formed at both ends of the rim portion 20b
A tire 24 is fitted inside b□ and 20b2. A pipe 21 is bridged along a path that penetrates the inside of the tire 24 from the extended annular portion 20b□, which is closer to the disk portion 20a, and reaches approximately the center of the rim portion 20b. pipe 21
A plurality of pipes are arranged in the circumferential direction of the rim portion, and the pipe diameter and number are appropriately set depending on the required cooling air volume.

As shown in FIG. 3(A), the overall shape of the pipe 21 is inclined at a predetermined angle so that the maximum amount of cooling air can be sent to the brake part 23 when the tire 24 rotates in the P direction. There is. Furthermore, the shape of the end 21' of the pipe 21 protruding from the extension annular portion 20b is formed so that when the pipe 21 rotates together with the wheel, external air is drawn into the pipe 21, as shown in FIG. 3(b). There is. - As an example, a device in which a scoop portion opening in the rotational circumferential direction P is formed is used.

When the axle runs, the tires 24 move in the P direction (in the case of forward movement)
The end 21' of the pipe 21 also rotates in the same direction. As a result, outside air is taken into the pipe 21 and led out to a cavity 25 surrounded by the inside of the rim part 20b and the outside of the brake part 23.

The air in the empty chamber 25 cools the outer periphery of the brake part 23 and is discharged from the opposite side of the disk part 20a to the outside of the wheel via the arrow X1. In this way, only the brake part 23 is attached to the disc part 20a, and no opening for ventilation is provided.

Figures 4 and 5 (a) and (b) are designed to discharge the air in the chamber surrounded by the inside of the rim and the outside of the brake part to the outside of the tire wheel through a pipe attached to the rim. This shows a second embodiment of the present invention, and FIG. 4 is a front sectional view of the wheel when viewed from the running direction of the vehicle, and FIG.
Figure (A) is a partial schematic diagram when viewed from direction B in Figure 4, and Figure 5 (B) is a diagram of the end shape of the pipe.

To explain the second embodiment, as shown in FIG. 4, the overall structure of a tire wheel 30 consisting of a rim portion 30b having extended annular portions 30b□, 30b and a disc portion 30a is the same as that of the first embodiment. However, the overall shape of the pipe 31 and the end shape 31' are slightly different. That is, the pipe 31 is for discharging cooling air, and as shown in FIG.
It is inclined at a predetermined angle so that the maximum amount of air in the empty chamber 35 surrounded by 3 can be discharged to the outside of the tire wheel 30 through the pipe 31. Also, an end portion 31 of the pipe 31 protrudes from the extended annular portion 30bi closer to the disk portion 30a.
As shown in FIG. 5(B), the shape of ' is formed so that when the pipe 31 rotates together with the wheel, the air inside the pipe 31 is exhausted. - As an example, an ejector in which a part of the ejector is opened in the rear part with respect to the rotation direction P is used.

When the vehicle runs, the tires 34 move in the P direction (in the case of forward movement)
The end portion 31' of the pipe 31 also rotates in the same direction. As a result, the opening of the end portion 31' becomes negative pressure, and the air in the empty chamber 35 surrounded by the rim portion 30b and the brake portion 33 is discharged from the end portion 31' to the outside of the tire wheel 30 via the pipe 31. be done. At this time, air is constantly replenished into the empty chamber 35 from outside the wheel on the side opposite to the disc part 30a, cooling air flows in the direction of arrow X2, and the outside of the brake part 33 is cooled.

In this way, only the brake part 33 is attached to the disc part 30a, and no opening for ventilation is provided.

Figures 6 and 7 (a) and (b) show that air is introduced from outside the tire wheel through a pipe into the cavity surrounded by the rim part and the brake part, and the air inside the cavity is This shows a third embodiment of the present invention in which the exhaust is discharged to the outside of the tire wheel via another pipe, and FIG. 6 is a front cross-sectional view of the wheel as seen from the running direction of the vehicle. FIG. 7(a) is a partial schematic diagram when viewed from direction C in FIG. 6, and FIG. 7(b) is a diagram of the end shapes of the two pipes.

To explain the third embodiment, as shown in FIG. 6, the overall structure of a tire wheel 40 consisting of a rim portion 40b having an extended annular portion 40b and 40b2 and a disk portion 40a is the same as that of the tire wheel of the first or second embodiment. , but differs in that two pipes are used: a cooling air introduction pipe 41 and a cooling air discharge pipe 42. The cooling air introduction pipe 41 is for introducing cooling air into the cavity 45 surrounded by the rim portion 40b and the brake portion 43, and its overall shape and the shape of the end portion 41' are shown in FIG. 7(A). As shown in (b) and (b), it is the same as the pipe 21 of the first embodiment. The pipe 42 for discharging cooling air is for discharging air from the empty chamber 45, and its overall shape and the shape of the end 42' are similar to those of the second embodiment as shown in FIGS. 7(a) and 7(b). It is the same as the pipe 31 in the example.

When the vehicle runs, the tires 44 move in the P direction (in the case of forward movement)
The cooling air is introduced from the end 41' of the pipe 41, and this air flows through the pipe 41 in the direction of arrow Y1 and is led out to the cavity 45.

On the other hand, the air in the empty chamber 45 flows in the direction of arrow Y2 through the pipe 42 and is discharged outside the tire wheel 40 from the end 42' of the pipe 42. The outside of the brake section 43 is cooled by continuous airflow flowing in the directions of arrows Y, Y2.

Compared to the first and second embodiments, the third embodiment does not require air intake and exhaust from the outside through the narrow space formed between the inside of the rim part and the outside of the brake part, so cooling is improved. The effect is great, and in the third embodiment as well, only the brake part 43 is attached to the disc part 40a, and no openings for ventilation are formed.

[Effects] As explained above based on the three embodiments, the present invention eliminates the need to form any openings for ventilation in the disc portion of the tire wheel, so there is no possibility that the strength of the disc portion will be reduced. Instead, iron wheels or aluminum wheels can be used as tires.

[Brief explanation of the drawing]

1 to 3 (A) and (B) show a first embodiment of the present invention, FIG. 1 is a front sectional view of the wheel, FIG. 2 is a XX sectional view of FIG. 1, and FIG. Figure 3 (a) is a partial schematic diagram of Figure 1 when viewed from the inlet direction, Figure 3 (b) is a diagram showing the end shape of the pipe, Figures 4 and 5 (a), ( B) shows a second embodiment of the present invention, FIG. 4 is a front sectional view of the wheel, FIG. (b) is a diagram showing the end shape of the pipe, FIGS. 6 and 7 (a) and (b) show the third embodiment of the present invention, and FIG. 6 is a front sectional view of the wheel. Figure 7 (a) is a partial schematic diagram when viewed from direction C in Figure 6, Figure 7 (b) is a diagram showing the end shape of the pipe, and Figure 8
Figure 9 shows a conventional brake cooling structure using a centrifugal fan, Figure 9 shows a conventional brake cooling structure using fins, and Figure 10 shows a conventional brake cooling structure using a scoop member. It is a figure showing the cooling structure of a brake part. In the diagram, 20.3o, 40...tire wheels 20a, 30a
, 40a...disk portions 20b, 30b, 40b...
・Rim part 23.33.43... Brake part 24.34.44... Tire 21.31.41.42... Cooling pipe, eve Figure 4 Figure 5 (A) Figure 5 ( B) Figure 6 Figure 7 (B) Figure 8 Figure 9 Figure 7 (B)

Claims (3)

[Claims] (1) A tire wheel consisting of a disc part and a rim part,
In a vehicle wheel that has a disc part and a brake part disposed in a rim part that rotates integrally with the rim part, and the rim part has an extended annular part at both ends into which a tire can be inserted, the extended annular part that is closer to the disc part A plurality of cooling air introduction pipes are provided that penetrate into the tire from the rim and reach approximately the center of the rim, and are arranged in a plurality of pipes in the circumferential direction of the rim, the pipes protruding from the extended annular part. A vehicle wheel characterized in that the shape of the end of the pipe is formed so that air can be introduced into the pipe when the wheel rotates. (2) A tire wheel consisting of a disc part and a rim part,
In a vehicle wheel that has a disc part and a brake part disposed within a rim part that rotates integrally with the rim part, and the rim part has an extended annular part formed at both ends into which a tire can be inserted, the extended annular part that is closer to the disc part. A plurality of cooling air exhaust pipes are provided that penetrate into the tire and reach approximately the center of the rim portion, and are arranged in a plurality of pipes in the circumferential direction of the rim portion, and protrude from the extended annular portion of the pipes. A vehicle wheel, characterized in that the end portion is shaped so that air can be discharged from the pipe when the wheel rotates. (3) A tire wheel consisting of a disc part and a rim part,
In a vehicle wheel, which has a brake part 43 disposed within a rim part that rotates integrally with the disc part, and in which the rim part has an extended annular part formed at both ends into which a tire can be inserted, the inner part of the tire is inserted into the tire from one extended annular part. A plurality of pipes for introducing cooling air are provided, penetrating through the pipe and bridging the part reaching approximately the center of the rim part, and arranged in a circumferential direction of the rim part, and penetrating into the tire from the other extended annular part. Cooling air exhaust pipes are provided to bridge the portion reaching approximately the center of the rim portion and alternate appropriately with the cooling air introduction pipes, and the ends of both pipes are shaped so as to protrude from the extended annular portion. A vehicle wheel characterized in that the cooling air introduction pipe is formed so that air can be introduced into the pipe, and the cooling air exhaust pipe is formed so that air can be discharged from the pipe when the wheel rotates.