JPH0118912Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a clutch brake device for an automobile, and in particular to a clutch that divides the brake disk into two parts and provides a gap in the direction of rotation to improve gear engagement when the clutch brake is activated. Regarding brake equipment.

Conventionally, in automobiles, especially automobiles equipped with dry double-plate clutches, when the gear on the drive side of the transmission is referred to as the "engine side" and the gear on the driven side as the "propeller shaft side," the following diagram is shown in Figure 1. By pressing the brake disc 1, which rotates integrally with a rotating body (not shown) on the engine side as shown, against a pad (not shown), which is a stationary member,
Braking is applied to the rotating body to stop the rotating body, and the second
As shown in the figure, a gear on the propeller shaft side, for example, a constant gear 2, was meshed with a gear 3 on the engine side. In this case, there was a problem in that the constant gear 2 could not be smoothly shifted depending on the stop position of the gear 3. In order to eliminate this problem, the dog portions 2a and 3a of the gears 2 and 3 are chamfered in an arc shape, that is, gear rounded, as shown in FIG. As shown in the figure, there were cases where the top surfaces touched each other, making it impossible to shift gears smoothly.

Further, Japanese Utility Model Application No. 56-55124 discloses a clutch disk, but in this conventional example, the flange of the disk hub is divided into a hub side and an outer peripheral side, and an annular elastic body is interposed between these parts. These two members can be rotated relative to each other only elastically, and after rotational displacement occurs, the reaction torque is always from one side. It is designed to act on the other. This is natural since this invention relates to a conventional clutch device used between an engine and a transmission, and was completed with the intention of improving the torsional rigidity of the flange. Therefore, it is clear that the clutch brake device of the present invention, which aims to brake a rotating body inside a transmission, is completely different in purpose, structure, and effect.

The present invention has been made in order to eliminate the drawbacks of the prior art described above, and its purpose is to construct a brake disc from a rotary plate and a brake plate that can be rotated relative to each other. Accordingly, a gear on the engine side, for example, a counter gear, can be slightly inelastically displaced in the rotational direction with respect to a brake disk, thereby preventing incorrect gear engagement when the clutch brake is operated.

In short, the present invention provides a clutch brake device that is attached to a rotating body on the engine side, such as a countershaft of an automobile transmission, for the purpose of braking the rotating body, which is a part of the transmission. A brake disc that applies braking is provided, and the brake disc is configured to include a rotary plate that rotates integrally with the rotary body, and a brake that can be rotated in an inelastic manner relative to the rotary plate with a gap in the rotational direction. It is characterized by consisting of a board.

The present invention will be explained below based on embodiments shown in the drawings. 3 to 5 relate to a first embodiment of the present invention, in which the brake disc 5 of the clutch brake device according to the present invention is divided into two parts, a rotary plate 6 and a brake plate 7. The rotary plate 6 consists of a pair of discs 8, each of which has a small diameter portion 9a fitted into a hole 8a formed near the outer periphery of the disc, which is sandwiched between the discs and symmetrical about the center of the disc. They are integrally fixed by a pair of pins 9 inserted and fixed. Further, a spline groove 8b is formed in the center of the disc 8 to mesh with a spline shaft (not shown) provided on a rotating body on the engine side, for example, a countershaft (not shown).

The brake plate 7 is formed in a ring shape, and the thickness t of the brake plate is set to be equal to or slightly smaller than the length of the pin 9. Brake plate 7
The diameter D ₁ of the inner circumferential surface 7a is set larger than the diameter D ₂ of the spline groove 8b of the disc 8. Further, in the vicinity of the inner peripheral surface 7a, a pair of arc-shaped elongated holes 7, which are symmetrical about the center of the brake plate 7 and are co-centered with the brake plate, are provided.
b is formed, and the distance L between the center lines of the widths of the elongated holes is set to be the same as the distance between the centers of the pins 9. As shown in FIG. 3, friction members 10 are fixed to the left and right sides of the brake plate 7 near its outer circumference, respectively, symmetrically with respect to the center of the brake plate.

When attaching the brake plate 7 to the rotating plate 6, first loosely fit a pair of pins 9 into the pair of elongated holes 7b of the brake plate 7, and then insert the pins 9 protruding from the left and right sides of the brake plate 7 as shown in FIG. The small diameter portion 9a of the pin 9 is inserted into the hole 8a of the pair of discs 8, and the ends of the small diameter portion 9a are squeezed. In this way, the rotary plate 6 and the brake plate 7 are configured to be relatively inelastically (plastically) rotationally displaced with a gap in the rotational direction.

The present invention is constructed as described above, and its operation will be explained below. When the clutch brake is not operating, the pin 9 of the rotary plate 6, which rotates integrally with the countershaft, comes into contact with one end of the elongated hole 7b of the brake plate 7 and presses the brake plate. It rotates integrally with the rotating plate 6. When the clutch brake is activated, the brake plate 7 is pressed against a stationary member via the friction member 10 by a pressing member, such as a piston (not shown), and is braked to a stop, and at the same time, the rotary plate 6 is also stopped. . In this state, as shown in Fig. 5, the constant gear 2 on the propeller shaft side is engaged with the gear 3 on the engine side, but as shown in the figure, the dog parts 2a and 3a of each gear come into contact with each other. In this case, the rotating plate 6 can be inelastically displaced by the rotational direction due to the pin 9 of the rotating plate and the elongated hole 7b of the brake plate 7, so the gear 3 can be easily displaced as shown by the imaginary line. It is possible to shift into gear.

As described above, according to the present invention, when the clutch brake is activated to shift into gear, even when the engine side gear 3 and the dog portions 2a, 3a of the constant gear 2 are in contact with each other, the rotating body 6 is rotated in the rotational direction. Since the gear 3 can be displaced inelastically, the gear 3 can be displaced until it meshes well with the constant gear 2, and in this case, strain energy is not stored in the rotating body 6, so the rotation is always smooth. You can shift into gear.

What is shown in FIGS. 6 and 7 is the second embodiment of the present invention.
In this embodiment, a pair of pins 9 are sandwiched and fixed between a brake plate 7 and a pair of mounting plates 12 fixed to the brake plate, symmetrically with respect to the center of the brake plate. The rotating plate is disposed in a pair of notches 6a formed on the outer peripheral surface of the rotating plate symmetrically about the center of the rotary plate.

When attaching the rotating plate 6 to the brake plate 7,
First, insert the pin 9 fixed in advance to the brake plate 7 into the notch 6a of the rotary plate 6, then insert the small diameter part 9a of the pin 9 into the hole 12a of the mounting plate 12 and swage it. It is fixed to the brake plate 7 by fixing means such as welding.

The present invention (second embodiment) is constructed as described above, and although there are some structural differences from the first embodiment, its operation is the same as that of the first embodiment, so the operation will be explained below. is omitted. Note that the same parts as in the first embodiment are designated by the same reference numerals in the drawings, and the description thereof will be omitted.

Since the present invention is constructed and operates as described above, it is composed of a rotating plate and a braking plate so that the brake disc can be rotated relatively and inelastically. can be displaced in the rotational direction, and has the effect that the constant gear on the propeller shaft side is always smoothly engaged when the clutch brake is activated.

[Brief explanation of the drawing]

1 and 2 relate to the conventional example, FIG. 1 is a vertical sectional view of the brake disc, FIG. 2 is an explanatory diagram showing the state when gear is engaged, and FIGS. 3 to 5 are the diagrams of the present invention. 3 is a vertical cross-sectional view of the brake disc, FIG. 4 is a vertical cross-sectional view taken along the - arrow in FIG. 3, FIG. 5 is an explanatory view showing the state when gear is engaged, and FIG. 7 relates to a second embodiment of the present invention, FIG. 6 is a longitudinal sectional view of the brake disc, and FIG. 7 is a longitudinal sectional view taken in the direction of the - arrow in FIG. 5 is a brake disk, 6 is a rotary plate, and 7 is a brake plate.

Claims (1)

[Scope of utility model registration request] In a clutch brake device that is attached to a rotating body on the engine side, such as a countershaft of an automobile transmission, for the purpose of braking the rotating body, the brake disc brakes the rotating body that constitutes a part of the transmission. The brake disc is comprised of a rotating plate that rotates integrally with the rotating body, and a braking plate that can be rotated inelastically relative to the rotating plate with a gap in the rotational direction. A clutch brake device featuring: