JPS5913144A - Natural cooling of wet-type disk brake - Google Patents

Abstract

PURPOSE:To increase the cooling effect by forming a penetration through-hole on the pressing surface of a piston and allowing lubricating oil to circulate through the inside and the outside of a brake chamber, in a brake apparatus in which rotors and stators are pressed in the brake chamber through the operation of a ring-shaped piston. CONSTITUTION:A number of disk-shaped rotors 1 are fixed in the direction of revolution with respect to a rotary shaft 2 and is installed so as to slidingly move in the axial direction. Further, a number of ring-shaped stators 3 are fixed in the direction of revolution with respect to a fixed pin 4 which is fixed in parallel to the rotary shaft 2 and installed so as to slidingly move in the axial direction. The rotor 1 and the stator 3 are pressed and brake-applied simultaneously in a brake chamber 6 by the operation of the ring-shaped piston 7 of a cylinder 10 fixed onto a case 5. In this case, a penetration through-hole 12 is form on the pressing surface 7' of the piston 7, and the inner and outer brake chambers 6 which are separated by said pressing surface 7' are allowed to communicate with each other. Thus, cooling oil is allowed to circulate through the inside and the outside of the brake chamber 6, and the cooling effect on the rotor 1 and the stator 3 is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a plurality of disk-shaped rotors that are fixed in the rotational direction and slidable in the axial direction with respect to the rotating shaft. A large number of ring plate-shaped stators, which are slidably attached to the rotor, are sequentially stacked one on top of the other in a concentric disk shape, and these rotors and stators are connected by the operation of an 11-ring-shaped piston installed in a ring-shaped cylinder. A natural cooling method for hydraulic wet disc brakes that performs pressure braking at the same time in cooling oil, specifically a natural cooling method for hydraulic wet disc brakes that aims to improve the cooling effect by increasing the circulation performance of the cooling oil. It is related to.

Conventionally, the piston in this Japanese cypress wet disc brake is not a spot type (in the case of an IJ type, the interior of the brake chamber 1, which consists of a cylinder and a piston installed in it, is divided into two parts by an 11 ring-shaped (cross-sectional) piston. This resulted in a situation where the cooling effect was not sufficiently exerted against the temperature rise due to friction between each rotor and stator. By providing a through hole in the pressing surface of the ring-shaped piston, or by providing an oil passage connected to the drain hole at the bottom of a portion of the cylinder at the rear end of the piston.
The desired purpose was achieved by circulating cooling oil.

The present invention will be explained below with reference to embodiments shown in the drawings.

Embodiment 1 In FIGS. 1 and 2, a multi-plate disk-shaped rotor (1) is fitted to a rotating shaft (2), and these rotors α) rotate with respect to the rotating shaft (2). It is mounted fixedly in the direction and slidably in the axial direction. In addition, a large number of ring plate-shaped stators (3) are slidably attached to fixing pins (4) parallel to the rotating shaft (2) and fixedly in the rotational direction of the rotor (1). and stator (3
) are immersed in neutralized cooling oil in the brake chamber (6) and are stacked one on top of the other in turn, and a cylinder (10) is fixedly installed in the case 6) facing the stator (3). ) Equipped with a drinking type piston (7) and both (7) (10
) is designed to operate the brake by pressing and clamping the rotor α) and stator (3) with the hydraulic pressure applied to the oil chamber (11) between the pistons (7) and
) is the ML spring.

The suppression surface (ring-shaped (flange-shaped) with a cross section of 7 points) of the above piston σ) without f, the brake chamber (6) between the inner circumferential surface of the cylinder (10) and the piston ('I) is I of
The situation is such that the I-song piston (7) divides the piston into two parts.
) is drilled with a through hole (12) in the piston ff)
The inner and outer brake chambers (6), which are divided into two parts by the inner and outer brake chambers (6), can communicate with each other.

This allows the cooling oil to circulate inside and outside the brake chamber (6), thereby improving the circulation performance of the cooling oil, and is expected to have a sufficient cooling effect against the temperature rise due to friction between the rotor α) and the stator (3). be done.

Embodiment 2 In this embodiment, in FIG. 1, the oil passage (14) is connected to the drain hole (13) of the lower 4W drain outlet a) of the cylinder (6) at the rear end of the piston (7). By providing Ω, natural circulation of the cooling oil is carried out through the core oil passage due to the temperature difference in the cooling oil caused by the increase in oil temperature due to friction between the gerotor 〇) and the stator 1. Similarly, the cooling effect can be enhanced.

4. Brief explanation of the drawings ・・First
The figure is a longitudinal sectional side view showing an embodiment of the present invention, and Figure 2 is a longitudinal sectional front view of the same.・・・Rotation axis ・３・・・・・・
・・・・・・・・・Stator 4・・・・・・・・・
・Fixing pin 5……0・Shell 6・・・・・・・・・Brake chamber 7・・・・・・
...Piston 7'...Press surface 8 of the piston...
......Piston return spring 9...
......Drain removal lO...Ciller 11...Oil chamber 12...Through hole 13... ...... Drain hole 5- E4... Oil passage 6-1

Claims (1)

[Claims] α) A large number of disc-shaped rotors that are fixed in the rotational direction and slidable in the axial direction with respect to the rotating shaft, and a number of disk-shaped rotors that are fixed in the rotational direction and slidable in the axial direction. A hydraulic type in which a large number of ring plate-shaped stators are stacked one on top of the other in a concentric circle, and the rotor and stator are simultaneously compressed and braked in cooling oil by the operation of a +1 ring type piston installed in a ring-shaped cylinder. In a wet type disc brake, improving the circulation performance of the cooling oil by providing a through hole in the pressing surface of the piston or providing an oil passage connected to a drain hole in a lower part of the cylinder at the rear end of the piston. A natural cooling method for wet disc brakes.