JPS62288751A - Gear-transmission type speed change operation device - Google Patents

Abstract

PURPOSE:To obtain smooth speed-change operation, by pivotally supporting a speed change arm, which has a change claw that is selectively engaged with engaging grooves formed in the inner periphery of a change gear at the tip of the shaft and which is pushed by resilience in the radial direction, to a speed change operation boss at an end of a change shaft in such a manner that the arm can freely rotate and also providing a controller regulating the engaging pressure of the said claw to the groove. CONSTITUTION:A speed change operation boss 12 is moved by operation in the axial direction, so that a speed change arm 13 is moved. A speed change claw 9 is thereby selectively engaged with an engaging groove 10 of a speed change gear 3 on a speed change shaft 4. At this time, the arm 13 is rotated around a pivotally supporting part 14 and is pushed by resilence to the engaging groove (10) side to be engaged with the groove 10. By regulating the engaging pressure of the arm 13 to this groove 10 by means of a controller 16, the moving operation to the operation boss 12 can be eased, and the engaged state of the arm 13 to the groove 10 can be maintained in a stable manner.

Description

DETAILED DESCRIPTION OF THE INVENTION 3. Detailed Description of the Invention Field of Industrial Application This invention relates to a gear transmission operating device, and can be used in traveling transmission devices for vehicles, mobile agricultural machines, etc.

Prior Art and Problems to be Solved by the Invention A large number of speed change gears are disposed on a speed change shaft, and the speed change gears are formed on the inner circumference of each speed change gear so that they can be moved and operated freely along the axial direction of the speed change shaft. A gear shift pawl that engages and selects engagement is provided in the engagement groove, and the gear that is engaged with this gear and the gear shaft are rotated together to transmit the gear change. In the case where the shift pawl is always provided with 91 shots facing the engagement groove of the transmission gear, it is difficult to move the shift pawl due to the frictional resistance caused by the sliding operation when the shift pawl is operated along the axial direction during a shift operation. In some cases,

These 3 ways to solve the problem? ! The gear change operation boss (12) is movable along one end of a shift shaft (4) on which a shift gear (3) is rotatably disposed, and the inner periphery of the shift gear (3) is attached to the tip of the shift operation boss (12). A speed change arm (13) having a speed change pawl (9) that selectively engages with an engagement groove (10) formed in the portion is pivoted (14) by pivoting in the radial direction. , the engagement lI! of the speed change pawl (9)! ! (10) Adjustment tool (
16) is provided.

Operation of the Invention When the shift operation boss (12) is operated to move in the axial direction, the shift arm (13) is moved integrally with the shift operation boss (12), and the shift claw (9) at the tip engages the shift gear on the shift shaft (4). It is selectively engaged with the engagement yt(10) of (3). At this time, each transmission gear (
3) % (10) between the gears [(t is the gear shift claw (9)
), when the engagement position of the shift pawl (9) is temporarily moved out of the shift groove (10) toward the axis, and is engaged with the target shift groove (10). The gear shift arm (13) is rotated in a recessed pivot (14) with respect to the gear shift operation boss (12);
The transmission groove (10) side is engaged once.

If the elastic force of the gear shift pawl (9) to the engagement groove (10) is too strong or too weak, adjust the engagement pressure to the engagement groove (10) using the "A adjustment tool 1B). and press the gear shift operation boss (
12) can be easily moved, and the engagement groove (1
0) to maintain a stable state of y-island.

Effects of the Invention As described above, by adjusting the engagement pressure of the transmission pawl (9) with respect to the engagement groove (10) of each transmission gear (3) using the adjusting device (16), the transmission pawl (9) and the transmission arm are adjusted. (13
) etc. can be adjusted to allow smooth gear shifting operations by adjusting the sliding resistance of the gear shift shaft (4), etc., and to reduce wear due to frictional resistance between the gear shifting pawl (9) and the engagement groove (10). ,
Shift engagement transmission can be accurately maintained for a long period of time.

Embodiment In the example shown in FIG. 1, the input shaft (1), the transmission shaft (4), and the transmission shaft (5
), a running clutch shaft (19), and a pair of left and right running shafts (
A gear (2) is arranged on the 0-man power shaft (1) which rotatably bears the 20) etc., so that the gear 1111 can be rotated integrally.
There is a pulley (21) at the outer end of this transmission case (X8).
It is configured such that a belt is transmitted between the drive pulley on the prime mover side and the drive pulley on the prime mover side. (22) is the human shaft (1) and pulley (21)
) is a buffer spring between the

The speed change shaft (4) is provided with a speed change groove (8) along the axial direction into which the speed change pawl (9) and the speed change pawl arm (13) fit, and is constantly meshed with each of the speed change gears (2) on the outer periphery thereof. A speed change gear (3) is rotatably provided, and a back gear (23)
is rotatably provided, and furthermore, a transmission gear (7) and the like are provided to rotate together.

A neutral ring (36) is located between the transmission gear (7), the low-speed end of the transmission gear (3), and the back gear (23).
is provided, the transmission gear (7) is meshed with the transmission gear (6) of the transmission shaft (5)), and the back gear (23) is always in 11 gears with the gear (2) on the human power shaft (1). In the state, the transmission shaft (
5), it is always engaged with the back idle gear (24) so as to be freely rotatable.

A partition l0 (35) is interposed between each transmission gear (3), the neutral ring (:l+s), the back gear (23), etc., and is rotatably provided.

A shift operation boss (12) that is movable in the axial direction is fitted into one end of the shift shaft (4), and a shift claw made of a flexible body such as a leaf spring is attached to the shift operation boss (12). Arm (1
3) is pivoted (14) by a pin in a direction perpendicular to the speed change shaft (4).

The speed change pawl (9) is integrally provided at the tip of the speed change pawl arm (13), and is formed into a triangular mountain shape along the axial direction. ),
and an engagement groove (
10) (11) Can be selectively fitted to (25).

Grooves and protrusions of annular engagement cams (15) are formed alternately in the axial direction on the outer peripheral surface of the end of the speed change shaft (4) into which the speed change operation boss (12) is fitted. Operation boss (12
) with this engaging cam (15).
It is possible to lock and stabilize the gear shift position in the axial direction by fitting the gear into the groove.

-1- The base end of the speed change pawl arm (13) has a speed change groove (8) formed with this engagement cam (15) section oriented in the axial direction.
It is mated to Further, the axial spacing of the locking cam (15) is made to match the axial spacing of the speed change gear (3), back gear (23), neutral ring (36), etc.

The speed change operation boss (12) is provided with an adjustment tool (18) such as a port that can press the end of the speed change claw arm (13) from the outside and adjust the pressing force. When the adjustment mA (16) is screwed into the shaft center side, the speed change pawl (9) portion is strongly pushed outward.

An operation case (2B) is provided on the outer periphery of the transmission shaft (4) on the side of the transmission operation boss (12) so as to be detachable from the transmission case (18), and the transmission shifter (27) is attached to the operation case (2B). 2B) to operate the gear shift operation boss (+2). A power take-off pulley (28) is provided at the other end of the speed change shaft (4), and the working device can be transmitted from this power take-off pulley (28).

The running clutch shaft (19) is rotatably provided with a center gear (29) meshing with the transmission gear (34) of the transmission shaft (5) in the center thereof, and side gears (30) are provided on both left and right sides of the transmission gear (34). Both gears (29) are movably provided.
(30) constitutes a running clutch (31). A transmission case (18) is installed on the outside of the side gear (30).
) is provided, and by moving the side gear (30) further outward from the strike clutch (31) disengagement position, this brake claw (
32) can be engaged to move the strike brake by one movement.

Each side gear (30) is connected to a running gear (33) on the running shaft (20) at all times to transmit the rotation of a tin rocket shaft such as a crawler.

Since each gear (2) is rotated by the rotation of the human power shaft (1), each transmission gear (3) meshing with this and the transmission shaft (
5) Back gear (23) via upper back idle gear (24) is rotated. The gear shift pawl (9) is connected to the neutral ring (36
), when the manual shaft (1
) side, the transmission to the running shaft (20) and the rotation of the power take-off pulley (28) are not performed every fourth position.

Rotate the gear shifter (27) to select the gear shift operation boss (12).
) in the axial direction and select an appropriate speed change position for operation Lj.

At this time, the gear change pawl (9) slides into contact with the gear IJJ ring (35) and swings around the pivot support (14), so the engagement groove (11)
The gear change pawl (9), which was engaged with adjacent engagement t
It is fitted into ilt (10) or (25), etc. At this selected shift position, the clip pawl is engaged with the groove of the engagement cam (15) to stop the shift pawl (9) from moving in the axial direction.

The transmission pawl (9) is connected to the engagement groove (1) of one of the transmission gears (3).
0), this engaged transmission gear (3)
The transmission shaft (4) is rotated under the transmission ratio of , which rotates the transmission shaft (5) via the transmission gears (7) and (6), and further rotates the transmission gear (34) and the center gear (29). Transmitted to.

Also, when the back gear (23) is engaged with the engagement groove (25), the back gear (24) is moved from the back idle gear (24).
3) and the transmission pawl (9), the transmission shaft (4) is reversely rotated, and the transmission shaft (5) is rotated in the same manner as described above through the transmission gears (7) and (6)'S.

When the speed change shaft (4) is thus rotated by transmission from the speed change gear (3), power is transmitted to the working device from the power take-off pulley (28).

By moving the side gear (30) laterally from the center gear (28) and cutting off the transmission, it is possible to make a strike by the transmission of the side gear (30) of the strike clutch on the opposite side, and furthermore, this strike can be used for sharp turns. When you want to operate the brake pawl (
32), this prevents the running shaft (20) on the running clutch disengagement side from turning.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a front sectional view, Fig. 2 is an enlarged front sectional view of a part thereof, Fig. 3 is a side sectional view, and Fig. 4 is a part of it. FIG. In the figure, (3) is the transmission gear, (4) is the transmission shaft, (9)
(10) is the gear shift pawl, (10) is the retaining groove, (12) is the gear shift operation boss, (13) is the gear shift arm, (14) is the pivot portion, (16)
indicates an adjuster. 4'F Name of Applicant Kataseki Agricultural Machinery Co., Ltd. Figure 3 Figure 4/l

Claims (1)

[Claims] A speed change operation boss (12) that can be freely moved and operated along one end of a speed change shaft (4) on which a speed change gear (3) is rotatably arranged;
The tip part has an engagement groove (
A shift arm (13) having a shift claw (9) that selectively engages with the shift arm (10) is pivoted in a radial direction to pivot freely.
4) A gear transmission speed change operation device further comprising an adjustment tool (16) for adjusting the engagement pressure of the speed change pawl (9) to the engagement groove (10).