JPS61294251A - Belt-type transmission operation device - Google Patents

Abstract

PURPOSE:To facilitate transmission shift operations in a transmission which performs both forward/reverse shift and stepless transmission by means of a single operation lever by applying brake action on an output shaft when the operation lever is in a position for changing forward/reverse directions. CONSTITUTION:When an operation lever 26 is moved along a side of a guide groove 27, a sliding sheave 10 of a drive side speed changing pulley 4 moves in the axial direction due to the movements of link mechanisms 35-42 to change the transmission ratio. When the operation lever is moved to the lowest speed side, a V-belt becomes to be supported by an idling body 16 of the drive side speed changing pulley 4 of the stepless transmission, making the rotation of driven transmission pulley 19 stop. At the same time, a brake body 24 of an intermediate transmitting member 20 is activated by the action of a brake arm to stop the rotation of an output shaft 21. If the operation lever 26 is moved in the right-angle direction under this condition, rotating direction of the intermediate transmitting member 20 is reversed by the action of a shift arm.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention is particularly directed to a belt-type speed change operating device used in a drive device for a combine harvester, a rice transplanter, or a vehicle body, and more specifically, a belt-type speed change operating device for use in a drive device for a combine harvester, a rice transplanter, or a vehicle body. The present invention relates to the above device capable of changing the rotation speed from high speed to low speed, stopping the output shaft using the operating lever, and further changing the rotation direction from forward movement to reverse movement.

(Prior Art) Conventionally, as a transmission device applied to agricultural machinery, a speed change pulley consisting of a fixed sheave and a sliding sheave that sandwich a V-belt is provided on either the drive shaft or the driven wheel, and the sliding of this speed change pulley is The moving sheave has a cam surface inclined in the axial direction on the back surface, and a speed change operating lever that is locked at multiple points is attached to this cam surface, and the distance between the sliding sheave and the fixed sheave is adjusted by operating the operating lever. A transmission device that adjusts and changes the rotation speed of a driven wheel is known, for example,
An example thereof is also disclosed in Japanese Patent No.-165182.

In addition, as a transmission device using other operating levers, for example, as shown in Japanese Utility Model Application No. 50-17-86, a transmission capable of forward and reverse rotation is installed between a drive shaft and a driven shaft. It has a structure in which a V-belt is hung over an intermediate input shaft between the drive shaft and the transmission, and an intermediate output shaft between the driven wheel and the transmission, respectively, and an operating lever is attached to the intermediate output shaft for the intermediate input shaft. A lever is provided that can selectively operate the direction of rotation of the transmission between forward rotation and reverse rotation, and by operating this operation lever in the front and rear direction, the transmission can be moved in the front and rear direction and the distance between the respective axes can be changed. There is something to change gears.

(Problem to be Solved by the Invention) However, in the conventional transmission device as described above, even though it is possible to change the speed of the driven wheel from high speed to low speed with a single operation lever, there is also a transmission etc. that can rotate forward and reverse at the same time. Even if it is possible to change the direction of rotation by the intermediate transmission member, the intermediate transmission member moves in the same direction as the operating lever moves back and forth, and this causes the V
Since the distance between the shafts of the pulleys on which the belt is hung can be varied to change speed, the structure is extremely complex.

In addition, although such conventional transmission devices can selectively operate the driven wheels from high speed to low speed and from normal rotation to reverse rotation with a single operating lever, they stop the rotation of the V-belt and completely stop the rotation of the transmission. There is no function to bring the transmission to a neutral (nHtral) state by stopping the vehicle.

Thus, the present invention deals with the above-mentioned situation and allows the rotation of the driven wheel to be continuously changed from high speed to low speed using one operating lever, and also to stop the rotation of the driven wheel from low speed to change the transmission to neutral. state, and from this state, the direction of rotation of the intermediate transmission member is changed from forward rotation to reverse rotation or the opposite direction to change the direction of movement of the agricultural machine or vehicle body, etc., and the direction of rotation is further changed. An object of the present invention is to provide an improved belt-type speed change operation device that enables a series of operations for shifting the rotation of a driven shaft from low speed to high speed.

(Means for Solving the Problems) That is, the feature of the present invention is that, as shown in the attached drawings, the present invention is characterized in that it moves on the shaft in opposition to a fixed sheave (9) fixed to the shaft. A sliding sheave αΦ is installed so that the distance between it and the fixed sheave can be adjusted, and an idling body (
16) is attached to the drive shaft (2).
an intermediate transmission member (20) which is rotatable in forward and reverse directions and has an output shaft; and a driven speed change pulley (19) connected to the input shaft (2, 3) of the transmission member (20). ), a driven part (18) consisting of the above-mentioned driving speed change pulley (4)
and the V-belt (17) hung over the driven speed change pulley (19).
), and the operating lever (26) and the guide groove of the lever (
27), in which the driving speed change pulley A is
) to move the sliding sheave QQI in the axial direction using the operation lever (2).
The shift operation member that is adjusted by the movement of the shaft (47) is brought into pressure contact with the operation lever (26).
), the brake operating member (45) converts the amount of rotation about the central axis into tensile force to actuate the brake body (24) provided on the intermediate transmission member (20), and the operating lever (
The rotation of the shaft of the shift arm (56), which engages with the intermediate transmission member (26) and pivots as the lever moves, is transmitted to the intermediate transmission member (20).
) The belt-type speed change operating device includes a forward/reverse converting member (50) that changes the direction of rotation of the intermediate transmitting member (20) by transmitting a signal to a forward/reverse shift lever (56a) provided at the intermediate transmitting member (20).

(Function) Therefore, in the belt-type speed change operating device according to the above configuration, first, when the operating lever (26) is located at the side end of the guide groove (27), the output shaft (21) is at the highest rotation speed. but,
When the operating lever (26) is gradually moved to the lower speed side from this state, the V-belt (17) is supported by the idle rolling element (16) of the driving speed change pulley (4), and the driven speed change pulley (19)
rotation stops. At the same time, the operating lever (26) operates the brake body (24) of the intermediate transmission member (20) via the brake arm fixed to the shaft, preventing rotation of the output shaft (21) and neutralizing the drive device. put it in a state.

Then, while maintaining this state, move the operating lever again and rotate the shift arm (56) to rotate the intermediate transmission member (
The rotation direction of 20) is switched and changed.

Subsequently, when the operating lever (26) is moved in the guide groove (27) along a different side than in the previous case, the rotation of the reversed output shaft (21) changes from low speed to high speed.

In this way, by operating the control lever, the rotation direction can be reversed, including the neutral state, from high speed to low speed, from low speed to high speed, and even from low speed to high speed, and if used appropriately on the vehicle body, the vehicle body speed can be changed and changed from the neutral state, and from forward to reverse. You can perform a series of operations to change the reverse speed by switching to .

(Example) Hereinafter, one example of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a plan view of a belt-type speed change operating device according to an embodiment of the present invention, FIG. 2 is a side view of FIG. 1, and FIG. 4 is a side view of FIG. 3, FIG. 5 is a side view of the forward/reverse conversion member that changes the rotational direction of the transmission member, FIG. 6 is a side view of FIG. 5, and FIG. 7 is the operation of the device of the present invention. This is an explanatory diagram showing a lever operation state, and as shown in Fig. 1, a drive speed change pulley (4) is connected to a drive shaft (2) of a driving body (1) such as a motor or an engine via a coupling (3). This constitutes a driving section (5).

Of course, the driving body (1) and the speed change pulley (4) are not shown, but are fixed on a support plate (7) installed on a frame (6) of a vehicle body or the like.

Therefore, the drive speed change pulley (4) is connected to the drive shaft (2).
A fixed sheave (9) is fixed to a shaft (8) connected to a shaft (8), and a sliding sheave αΦ that moves on the shaft (8) in opposition to this is attached. The elasticity of a coil spring (12) interposed between a stopper (11) fixed with a bolt or the like is always pressed toward the stationary sheep (9).

(13) is a shifter in which an annular groove (14) is formed on the outer circumferential surface, and the shifter protrudes from the side of the sliding sheave α and is installed on the outer circumferential surface of the boss portion via a bearing (not shown). This shifter (13) is connected to a coil spring (12) via a tip link (15) fitted in an annular groove (14).
) against the fixed sheep (9) while moving in the direction of the arrow.
) and the sliding sheave (2) are adjusted.

In addition, the driving speed change pulley (5) is equipped with an idle rolling element (16), especially an idle rolling element (16) whose outer peripheral surface has a medium height, on the shaft (8) between the fixed sheave (9) and the sliding sheave α. When the bottom surface of the V-belt (17) is supported by the idling body (16), the V-belt (17) is always supported at the center position of the idling body (16), and the distance between the two sheaves is By expanding this, the V-belt is prevented from rotating along with the rotation of the sheep due to the deflection of either one of the sheep in the sheep direction, and the complete stop of (1) (17) is ensured.

On the other hand, a position a little apart from the drive section (5), that is, the first
A driven part (18) is installed in the central part (not shown), and the driven part (18) is located between the two sheaves like the drive gear shift boot of the drive part, and is located on the shaft with an idling body (16). ) is not attached to the driven speed change pulley (19) and an intermediate transmission member (20) that can rotate in forward and reverse directions such as a transmission connected to this pulley (19)
It consists of

Note that the shaft of the intermediate transmission member (20), that is, the output shaft (
Wheels (22) and the like to be attached to the vehicle body are attached to both ends of 21).

A bell (17) is hung from each of the speed change pulleys (4) and (19) provided in the driving part (5) and the driven part (18), and the driven speed change pulley (19) provided in the driven part is suspended. ) is transmitted from the input shaft (23) of the intermediate transmission member (20) to the output shaft (21) of the intermediate transmission member (20).

As mentioned above, the intermediate transmission member (20) has a structure capable of rotating in forward and reverse directions, and is equipped with a brake body (24), as well as a band (25) as shown in FIG.
It is firmly fixed to the frame (6) by.

The gear shift operation member, which has a ridge-like structure, has an output shaft (2
1) from high speed to low speed, and the output shaft (2
1) A control lever (26) and a U-shape for controlling the operation of the lever (26) in order to maintain the 22'-tral state of stopping the output shaft and perform a series of operations to change the direction of rotation of the output shaft. A shifter box (28) defining a guide groove (27) is attached.

The lower end of the operating lever (26) serves as a fulcrum, and the ball bearing (3) is inserted into a bearing block (30) fixed to the support (29) of the shifter box (28).
1), and can freely move forward, backward, left and right in the U-shaped guide groove (27) using this as a fulcrum.

A clevis (32) is attached to the vicinity of the lower end of the operating lever (26) by a support shaft (33) (third
(see figure), and the tip link (15) of the link assembly (34) is coupled to this clevis (32).

The link combination (34) has five links as shown in FIG.
The connecting combinations are bendably connected by a fulcrum and a connecting part, and the distal end link member (
15) is the driving speed change pulley (4) installed in the drive unit (5).
) is adapted to move the sliding sheave QOI in the axial direction by means of a first fixed fulcrum (35 inches), and a second link (36) linked therewith, The second link (36) and the third link (38) are connected at right angles to each other by the first movable connecting part (37) and on the same plane. However, the third link (38) and the fourth link (40) are connected via a support shaft (41) at right angles and with a step.

The fourth link (40) and the rear end link (42) are connected at right angles and on the same plane by a third movable connecting portion (43). Therefore, when the operating lever (26) moves through the grooves on both sides of the U-shaped guide groove (27), the link assembly (34) bends and deforms, causing the drive gear shift provided in the drive unit (5) to Move the sliding sheave αω of the belt (17) and change the gripping position of the belt (17) to
The rotation of 21) can be changed from high speed to low speed and from low speed to high speed.

Thus, in FIG. 1, when the operating lever (26) moves from the A position to the B position, the rotation of the output shaft (21) changes from high speed to low speed.

In the figure, (45) is a brake operating member, and a shaft (47) rotatably inserted and fixed into the side wall (46) of the shifter box (28) has an engagement plate (48) that is in pressure contact with the operating lever (26). ) is held by a pair of projection members (49) fixed to the shirt (47).

One side wall (4) of the shifter box (28)
There is a brake arm (44) fixedly attached to the shirt (47) on the outside of the shirt (6), and a brake body attached to the intermediate transmission member (26) is attached to the end of the brake arm (44). A bendable tensile member (R), such as a wire, is connected to (24).

This allows the operating lever (26) to move into the U-shaped guide groove (
27), that is, the N part in FIG. 1, comes into pressure contact with the engagement plate (48), and thereby
) is rotated to apply tension to the tensile member (R) and actuate the brake member (24).

Furthermore, (50) in the figure is a forward/reverse converting member, and as shown in FIG.
A protruding pin (52) is fixedly arranged on the shifter box (28), and the auxiliary plate (53) is located at the bottom of the rear of the auxiliary plates (53) provided at the front and rear of the shifter box (28). The arm bin (54
), and a shift arm (56) having a through hole (55) is fixed to the tip of this bin (54) and inside the shifter box (2B), and a bin (52) provided on the operating lever (26) is fixed thereto. is the through hole (5) of the shift arm (56).
5), and by moving the operating lever (26) in the left-right direction, that is, by moving it in the bottom region of the U-shaped guide groove (27), the arm bin (54)? Rotate.

The tip of this arm bottle (54) and the intermediate transmission member (20
At the tip of the forward/reverse shift lever (56a) connected to ), there are three link members (
57) (58) (59) are coupled to a swing link coupling member (62) consisting of two movable coupling parts (60) and (61) that link them, and the operating lever (26)
When the shift arm (56) pivots due to the transition, the movable connecting portion (60) of the link connecting member (62)
(61) moves in an arc shape (63) around the arm pin (54) and the forward/reverse shift lever (56a), thereby rotating the forward/reverse shift lever (56a),
It becomes possible to switch the intermediate transmission member (20) from normal rotation to reverse rotation, or from reverse rotation to normal rotation.

The end portion of the forward/reverse shift lever (56a) is inserted into a bearing (66) on a stand (65) fixed to the support plate (64) of the shift box (28).

The illustrated embodiment has the above-mentioned structure, and its operation will be explained next. FIG. One side (67) of both sides of (27)
, the output shaft (21) is in a region (A) where the speed changes from high speed to low speed in normal rotation.

That is, the operating lever (26) is located at the end (68) of the side (67).
), the sliding sheave 001 of the driving speed change pulley (4) is closest to the fixed sheave (9), and the output shaft (21) rotates at the highest speed. In this case, a hook part (71) for the operating lever (26) is provided on the side to facilitate setting the speed from high speed to low speed in stages.

Therefore, the operating lever (26) is connected to the guide m (27).
When the side edge (67) of is moved in the direction of the arrow in the figure, the output shaft (
21) gradually rotates at a low speed, and the operation lever (26)
) is from the side (67) to the bottom (6) of the guide groove (27).
When you enter part of the corner (60) or the bottom (69) of 9), the ■ bell) (17) will be connected to the drive speed change pulley (4).
The driven speed change pulley (19) is supported by the idle rolling body (16) of
) stops rotating, and at the same time, the operating lever (26) comes into pressure contact with the engagement plate (48), pivoting the brake arm (44) fixed to the shaft (47), and rotating the intermediate transmission member (
The brake body (24) of the output shaft (21) is activated.
) can be completely prevented from rotating and the drive device of the vehicle body etc. can be placed in a neutral state.

Furthermore, while maintaining the neutral state, operate the bottom (69) of the U-shaped guide groove (27) to /5J-(
When the protruding bin (52) of 26) is fitted into the shift arm (56) and the shift arm (56) is rotated as the operating lever (26) is moved, the arm bin (54) pivots and this The turning link connecting member (62) is actuated to change the direction of rotation of the intermediate transmission member (20) and move it to another corner (61) of the bottom side (69).

Next, the operating lever (26) is inserted into the U-shaped guide groove (27).
Transferring the other side (27) from its end (61), the rotation of the reversed output shaft (21) changes from low speed to high speed.

In this way, the operation lever (26) is connected to the U-shaped guide groove (
When moving from the end (68) of 2'Q to the other end (70), the output shaft (21) changes from high speed to low speed, then stops at the bottom (69) and becomes a neutral state, and furthermore, this Reverse the direction of rotation.

Then, the output shaft (21) changes from low speed to high speed in a reversed state.

Therefore, when the above-mentioned belt type transmission is applied to a vehicle body such as an agricultural machine or an automobile, it not only changes the speed of the vehicle body appropriately as described above, but also switches the vehicle body from a neutral state to forward motion to reverse motion, and then changes the reverse speed. operations can be performed smoothly and continuously.

(Effects of the Invention) As described above, the belt-type transmission device of the present invention has a driving speed change pulley and a driven speed change pulley with a belt attached thereto, and an intermediate transmission member that can rotate in forward and reverse directions on the driven speed change pulley. A flexible link assembly between an operating lever that moves a guide groove and a shifter of a sliding seed of a driving speed change pulley in a transmission device that has an output shaft that connects the wheels and arranges a wheel or the like on an intermediate transmission member. By interposing it, the link assembly can be actuated by the movement of the operating lever to change the speed of the output shaft, and it can also be brought into pressure contact with the operating lever, thereby converting the amount of rotation around the shaft into tensile force. A brake operating member that operates a brake body attached to an intermediate transmission member, and a pin of an operating lever are engaged with a through hole of an arm pin to rotate the arm pin, thereby creating a forward/reverse shift lever. This device is equipped with a forward/reverse converting member that reverses the direction of rotation of the intermediate transmission member by activating it, and by simply moving the operating lever along the guide groove, it can not only change the rotation speed of the output shaft but also change the rotation speed of the output shaft. , the rotation of the output shaft is stopped to maintain a neutral state, and the rotation of the output shaft is then changed to switch the vehicle from forward to reverse, and while this is held, the vehicle can change from low speed to high speed. A series of operations can be easily performed continuously, and it can be applied to drive devices for various vehicle bodies including agricultural machinery.Moreover, the transmission device of the present invention has a driving speed change pulley and a driven speed change pulley. The gear change operation is carried out by the gear change operation, which also has the effect of making the structure extremely simple compared to the conventional structure that relies on gear change using an intermediate transmission member.

[Brief explanation of drawings]

FIG. 1 is a plan view of a belt-type shift operating device according to an embodiment of the present invention, FIG. 2 is a side view of FIG. The figure is a side view of FIG. 3, FIG. 5 is a side view of the forward/reverse conversion member in the above device, FIG. 6 is a side view of FIG. 5, and FIG. 7 is an explanation showing the operating state of the operating lever in the above device. It is a diagram. (2)...Drive shaft. (4)... Drive variable speed pulley. (5)...Drive section. (9)...Fixed sheave. (10)...Sliding sheave. (16)... Idle rolling body. (17)...V-belt. (18)...Following part. (19) ... Driven speed change pulley. (20)...Intermediate transmission member. (21)...Output shaft. (23)...Input shaft. (24) Brake body. (26)...Operation lever. (27)...U-shaped guide groove. (28)...Shifter box. (45) Brake operating member. (47)...Shaft. (50)... Forward/forward conversion member. (56)...Shift arm. (56a) ... Forward/forward shift lever 9 agent Patent attorney Yasushi Miyamoto -1 rod 4th

Claims (1)

[Claims] 1. A drive in which a sliding sheave is attached so that it can move on the shaft opposite to a fixed sheave fixed to the shaft and adjust the distance between it and the fixed sheave, and an idler is provided between both sheaves. A driving part that connects the transmission pulley to the drive shaft, a driven part that includes an intermediate transmission member that can rotate in forward and backward directions and has an output shaft, and a driven transmission pulley that is connected to the input shaft of the transmission member, and the driving transmission pulley and In a belt-type speed change operation device comprising a V-belt hung over a driven speed change pulley, an operating lever, and a shifter box defining a guide groove for the lever, the axial direction of the sliding sheave of the drive speed change pulley in the drive section is A speed change operating member whose movement is adjusted by the movement of an operating lever is brought into pressure contact with the operating lever, thereby converting the amount of rotation about the shaft into a tensile force to actuate a brake body provided on the intermediate transmission member. a brake operating member that transmits rotation of a shaft of a shift arm that engages with the operating lever and rotates as the lever moves to a forward/reverse shift lever provided on the intermediate transmission member; 1. A belt-type speed change operating device comprising: forward and backward converting members for changing the direction of rotation of the belt. 2. The belt-type speed change operation device according to claim 1, wherein the speed change operation member is constituted by a bendable and deformable link connecting member connected between a sliding sheave of a driving speed change pulley and an operating lever. . 3. The brake operating member is configured to actuate the brake body by converting the amount of rotation of the arm connected to the rotating shaft into a tensile force by a bendable tensile member in contact with the operating lever. The belt speed change operation device according to item 1. 4. The forward/reverse conversion member engages with the operating lever and can be bent and deformed between the shaft of the shift arm that pivots as the lever moves and the end of the forward/reverse shift arm provided on the intermediate transmission member. 2. A belt-type speed change operating device according to claim 1, which comprises a turning link connecting member.