JP2893838B2 - Clutch device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a clutch device, and can be used for a tractor traveling transmission device and the like.

(Problems to be Solved by the Related Art and the Invention) In working travel by a tractor, the forward engagement and the reverse travel are performed by changing the engagement state of the clutch so that the forward engagement is quickly performed. On the other hand, the clutch operation for reverse running is performed gradually to avoid the risk of sudden start. When the clutch is to be engaged at the time of backward start in the same manner as at the time of forward start, sudden start is often dangerous due to a difference in steering feeling. In such a case, the present invention allows the clutch to be gently and stably engaged regardless of whether the clutch operation by the operation lever or the like is slow or fast.

(Means for Solving the Problems) The present invention relates to a clutch disk 2 for a drive side and a non-drive side.
On the input side of the friction clutch 1 that is transmitted by the pressure contact of the discs 8 and 34, a pressing mechanism 3 that sequentially moves toward the discs 28 and 34 by rotation around the clutch shaft 2 and presses the discs 28 and 34 is provided. On the output side, there is provided an output clutch 4 for switching the transmission state from the slip state of the discs 28 and 34 to the bite state of the claws 36 and 37 by further moving the pressing mechanism 3 in the direction. It shall be a clutch device.

(Operation and Effect of the Invention) When the friction clutch 1 is operated to transmit power, the input-side pressing mechanism 3 is operated by rotating around the clutch shaft 2, and the drive-side and non-drive-side disks 28, 34 are operated. Is pressed. Further, when the pressing mechanism 3 moves in the same direction, the clutch claws 36 and 37 at the rear portion engage, and the transmission of the friction clutch 1 is switched from the slipping state of the disks 28 and 34 to the engaging state.

In this way, the clutch discs 28 and 34 are pressed against each other in accordance with the rotation of the pressing mechanism 3, and when the clutch discs 28 and
Since 37 is engaged, stable clutch engagement can be performed.

(Example) In FIGS. 1 to 3, an input shaft 6 transmitted from the engine side via a main clutch is provided on a transmission case 5.
From the input shaft 6, a forward / reverse switching clutch and clutch device 8
The main shaft 9 that transmits power to the traveling wheels via the above-mentioned components, the power take-out shaft 10 that transmits power to the working device, and the like are mounted.

On the main shaft 9, a drive gear 12, a back gear 13, which constantly meshes with an input gear 11 of the input shaft 6, from a front portion to a rear position.
An input clutch 3, a friction clutch 1, an output clutch 4, and the like serving as a pressing mechanism are arranged. A rotatable clutch cylinder shaft 14 is provided between the inner periphery of the back gear 13 and the outer periphery of the main shaft 9, and the input clutch 3 is engaged with the distal end of the clutch cylinder shaft 14 so as to always rotate integrally. . A clutch cylinder 15 that can move back and forth between the drive gear 12 and the back gear 13 is configured to be moved by a shifter 17 by an operation lever 16, and a ball hole 18 is provided in a boss portion of the drive gear 12. The main shaft 9 into which the boss is fitted has the ball hole 18.
Spline groove for fitting the clutch ball 19 in the overlapped part with
20 and a ball hole 21 in the boss of the back gear 13.
A spline groove 23 in which the clutch ball 22 fits is formed in a portion of the clutch cylinder shaft 14 in which the boss portion fits and in a portion where the ball hole 21 overlaps.

By moving the clutch cylinder 15 from the neutral position N to the front drive gear 12 side, the clutch ball 19 is pushed into the spline groove 20, and the drive gear 12 and the main shaft 9 rotate integrally so as to advance. Position F. Also, clutch cylinder
The clutch ball 22 is pushed into the spline groove 23 by moving the back gear 13 from the neutral position N to the rear gear 13 side, so that the back gear 13 and the clutch cylinder shaft 14 are integrally rotated so as to be in the reverse position R. I do. By such a switching operation of the clutch cylinder 15, the clutch balls 19 and 22 when not pressed by the clutch cylinder 15 are floated in the ball holes 18, 21 and the like of the outer peripheral boss portion and do not transmit. Gears 24 and 25 on power take-off shaft 10
By meshing with the back gear 13 via the back counter gear 26 while being meshed with the clutch 12, the transmission can be transmitted from the back gear 13 which is always rotating at the reverse position R of the clutch cylinder 15 to the clutch cylinder shaft 14.

The input clutch 3 integrated with the rear end of the clutch cylinder shaft 14 is provided with a pressure disk 29 for pressing a clutch disk 28 of the friction clutch 1 in a dish-shaped clutch case 27. Between,
Form a guide groove 31 along the rotation direction to guide the ball 30,
The guide groove 31 is formed on a tapered inclined surface 32 which is inclined toward the clutch case 27 as it shifts in the rotation direction on the pressure disk 29 side, and the ball 30 is fitted shallowly on the clutch case 27 side. A ball fitting portion 33 is formed. When the clutch case 27 rotates A while the ball 30 is fitted in the ball fitting portion 33, the ball 30
Along with moving in the direction, the inclined surface 32 is pushed to move the pressure disk 29 to the rear friction clutch 1 side,
By pressing the clutch disk 28, the friction clutch 1 can be engaged.

The clutch shaft 2 of the friction clutch 1 has a main shaft 9 formed as a spline shaft and engages the inner peripheral edge of a part of the clutch disk 28 so as to be movable in the axial direction.
The friction between the receiving disk 34, which rotates integrally with the clutch case 27 by receiving the rear end face, and the shaft disk 35, which faces the rear side and is spline-fitted to the main shaft 9, due to the approach of the axial movement. Occlusal waveforms or occlusal portions in the form of Kikuza 36, 37
Is formed. When the friction clutch 1 is pushed to the rear side B by the input clutch 3, the receiving disk 34 is moved against the spring 38, the engaging portions 36, 37 approach, and the slipping state is sequentially changed to the deep engaging state. Eventually, the receiving disk 34 and the shaft disk 35 rotate integrally. As a result, the output clutch 4 is engaged, and the rotation of the back gear 13 is transmitted to the main shaft 9 via the input clutch 3, the friction clutch 1, the output clutch 4, and the like.

When the clutch cylinder 15 is moved to the forward position F by the operation lever 16, the rotation of the input gear 11 is transmitted through the drive gear 12, the clutch ball 19, the spline groove 20, etc., to the forward rotation of the main shaft 9, and the forward switching transmission is performed. Promptly to transmit the running wheels forward. When the clutch cylinder 15 is operated to the reverse position R, the drive gear 12, the gears 24 and 25, the back counter gear 26,
The main shaft 9 is reversely transmitted through the back gear 13, the clutch ball 22, the spline groove 23, the clutch cylinder shaft 14, the input clutch 3, the friction clutch 1, the output clutch 4, and the like. In the transmission of this reverse position, the clutch ball 30 of the input clutch 3
Due to the axial movement B of the friction clutch 1 due to the pressing of the inclined surface 32 by the pressing and the sequential engagement of the engaging portions 36 and 37, the reverse clutch device 8 is sequentially engaged, and the reverse switching transmission is slowly performed. It can be carried out.

In FIG. 4, the difference from the above example is that the forward / reverse switching clutch 7 is changed to a ball clutch configuration using the clutch balls 20, 22 and the like as in the above example, and is shifted forward and backward with respect to the spline barrel 44 by a shifter. In the clutch body 39 to be moved,
The occlusal teeth 40 and 41 are formed, and the occlusal teeth 40 are engaged with the occlusal teeth 42 of the front drive gear 12 to be in the forward position F, and are engaged with the occlusal teeth 43 of the front back gear 13 to be in the reverse position R. It is configured as a dog clutch.

With such a configuration, at both the forward position F and the reverse position R, the transmission is transmitted from the drive gear 12 or the back gear 13 to the clutch case 27 through the spline shaft cylinder 44 that meshes with the spline. While the transmission gear is directly driven to rotate by the occlusion of the 12 occlusal teeth 42 and the occlusal teeth 40, the gear gear 2
4, 25, the back counter gear 26, the back gear 13 and the like, and are indirectly transmitted by occlusal engagement of the occlusal teeth 43, 41. For this reason, the spline barrel 44 is moved forward and backward F, R
Since both are transmitted to the input clutch 3, the clutch can be slowly engaged by the clutch device 8 in both forward and backward switching.

[Brief description of the drawings]

1 shows an embodiment of the present invention. FIG. 1 is a partial cross-sectional view, FIG. 2 is a partial cross-sectional view, FIG. 3 is a partial oblique view, and FIG. FIG. 10 is a side sectional view of another embodiment of FIG. (Explanation of reference numerals) 1... Friction clutch, 2... Clutch shaft 3... Input clutch, 4.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F16D 43/26

Claims (1)

(57) [Claims] A clutch disk for a driving side and a clutch disk for a non-driving side.
On the input side of the friction clutch 1 that is transmitted by the pressure contact of 4, a rotation mechanism around the clutch shaft 2 is provided with a pressing mechanism 3 that sequentially moves in the direction of the disks 28 and 34 to press the disks 28 and 34 against each other. The clutch device further includes an output clutch 4 for switching the transmission state from the slip state of the disks 28 and 34 to the engagement state of the claws 36 and 37 by further moving the pressing mechanism 3 in the direction. .