JPH082037Y2 - Transmission in vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention comprises a transmission unit of a traveling device including at least a main transmission unit including a continuously variable transmission, a main clutch, and subsequently a gear transmission. The present invention relates to a transmission in a vehicle that includes a sub-transmission unit and left and right side clutches.

(B) Prior Art Conventionally, in a vehicle in which a main clutch is provided on an input side or an output side of a main transmission unit, and an auxiliary transmission unit and subsequently left and right side clutches are interposed between the main transmission unit and an axle. ,
When performing a gear shift operation of the sub-transmission unit composed of a gear transmission, the sub-transmission unit is gear-changed with the main clutch disengaged.

(C) Problems to be solved by the invention In the above-mentioned known vehicle, since the main clutch is disengaged in advance when the sub-transmission operation is performed, the drive side shaft of the sub-transmission unit is rotatable. However, the left and right side clutches that are connected to the axle are engaged, and the driven side shaft of the auxiliary transmission unit does not rotate due to braking of the axle based on the weight of the vehicle. When the crests and the crests are in contact with each other, the speed change gears do not mesh with each other and it is difficult to switch the sub speed change.

(D) Means for Solving the Problems The present invention is designed to transmit power transmitted from an engine through a continuously variable transmission and a main clutch through a gear transmission and a pair of left and right side clutches provided in a transmission case. In the vehicle configured to transmit to the left and right axles, the main clutch and the left and right side clutches are interlockingly connected to a single manual operation tool provided in the control section via a connecting member, and thus the single manual operation tool. The above-mentioned problems are solved by making all of those clutches disengage substantially at the same time by the operation of (3) so that the input side shaft and the output side shaft become free during the auxiliary shift operation.

(E) Action When a single human-operated operation tool provided in the control section is cut and operated,
The main clutch and the left and right side clutches work together to disengage at the same time.

In this state, both the input-side shaft and the output-side shaft of the sub-transmission unit are free, so even if the ridges of the sub-transmission gears clash, either the input-side shaft or the output-side shaft Either or both of them rotate to allow the sub-transmission gears to mesh with each other, so that a smooth switching operation can be performed.

When the manual operation tool is turned on after the gear shift operation, the main clutch is turned on, and the left and right side clutches are also turned on.

(F) Embodiments An embodiment of the present invention will be described with reference to the drawings. A threshing device 3 is mounted on one side of a machine base 2 having a traveling device 1, and on the other side, an operation panel 4 and an operation are sequentially performed from the front. A seat 5 and a paddy treatment unit 6 are provided, an engine is provided in the lower part of the driver's seat 5, and a pretreatment device 7 including a mowing device and a grain culm transporting device is provided in a front portion of the threshing device 3 by a pretreatment frame. It is mounted so that it can be tilted up and down, and a single-acting hydraulic cylinder is interposed between the front portion of the machine base 2 and the pretreatment frame to tilt the pretreatment device 7 up and down.

A mission case 10 is provided below the threshing device 3 in the operation step 8, and the mission case 10 includes:
An input shaft 13 driven by a belt 12 with a tension pulley 11 is supported from above the rear part of the engine, and a drive shaft 15 to which a drive split pulley 14 of a belt type continuously variable transmission is attached is provided immediately below the input shaft 13. The pump shaft 16 is supported as a lower side, and a driven shaft 20 having a driven split pulley 18 attached with a main clutch 17 composed of a multi-plate clutch is supported on the upper front side, and the driven shaft 20 is driven. On the shaft 15 side, a mowing drive shaft 23 driven by the driven shaft 20 via gears 21 and 22.
And the auxiliary transmission shaft 25, the counter shaft 26, the side clutch shaft 27, and the left and right crawler drive sprockets 28, 28 below the drive shaft 15 obliquely rearward from the driven shaft 20.
Is mounted on the driven shaft 20, and the forward / reverse shift clutch 36 is spline-fitted between the forward gear 33 and the reverse gear 35 rotatably supported on the driven shaft 20. 71, so that it can be moved left and right through the shifter 37, etc.
A gear 39 meshing with 33 and a gear 40 meshing with a gear 34 spline-fitted to the auxiliary transmission shaft 25 are fixed, and the reverse gear 35 is also meshed with the gear 40.

The sub transmission gear 41 is a small diameter gear, a large diameter gear, and a medium diameter gear in order from one side, and is spline-fitted to the sub transmission shaft 25 so that the sub transmission shaft 25 can slide freely. And a switching operation via the shifter 72b, and the counter shaft 26 is fixed with a large gear 42, a small gear 43, and a middle gear 45 in which the large, medium, and small gears of the auxiliary transmission gear 41 are selectively meshed,
A center gear 46 rotatably supported at the center of the side clutch shaft 27 meshes with the pinion gear 43 and has clutches on both sides of the shaft support portion, and a pair of left and right clutch gears 48, 50 as side clutches on both sides thereof. Although it transmits rotation, it is slidably attached to the left and right, and side brakes 51 and 52 are attached to the outside of each clutch gear 48 and 50. The spool 53 that constitutes the switching device has a pair of left and right flanges 55 and 56, and the bent portion at the upper end of the shifters 57 and 58 whose lower ends are loosely fitted in the circumferential grooves of the clutch gears 48 and 50 is the spool 53. Oil chambers 60 and 61, which are opposed to the inner sides of the flanges 55 and 56 and into which both ends of the spool 53 are inserted, are connected to a pump 63 via a steering valve 62 as shown in the hydraulic circuit diagram.

The drive shaft 15, the driven shaft 20, and the axle 30 are arranged in an inverted triangular shape in a side view as shown in FIG. 4 among the respective transmission shafts below the belt type continuously variable transmission mechanism. 23 is disposed between the upper drive shaft 15 and the driven shaft 20, and the auxiliary transmission shaft 25, the counter shaft 26, and the side clutch shaft 27, which constitute the acceleration / deceleration mechanism, are disposed between the driven shaft 20 and the axle 30. It is arranged. With such a configuration, the belt continuously variable transmission is located within the height of the mission case 10,
A drive split pulley of a continuously variable transmission as shown in FIG.
When the mission case 10 can be arranged with the 14 and the driven split pulley 18 intruding below the operation step 8, and another working machine such as the pretreatment device 7 is arranged on the side thereof, The work implement can be brought closer to the operating step 8 or can be arranged with sufficient margin.

Further, the operation panel 4 is provided with one operation lever 59 supported by a spherical body 64 so as to be tilted in different directions,
The steering valve 62 and the lifting valve 65 of the hydraulic cylinder 6a of the pretreatment device 7 are integrally combined as a unit A, and the steering valve 62 is mounted on one side of a sphere 64 to lift the lifting valve.
65 is attached to a bracket 4c fixed to a cross rail connecting the right and left struts of the operation panel 4 so that the rams 62a, 65 are located at the rear portion (or front portion).
a is linked to the operating lever 59, and the lifting valve 65
The ram 65a has a protrusion 65b fixed to the side surface of the upper end thereof, and the lock shaft 67 rotatably supported on the operation panel 4 has a grip portion 68 on the outer end and a crescent-shaped notch on the outer periphery of the inner end. The projection 65b is allowed to descend, and the notch outer peripheral surface is fixed to the descending stopper 69, and the reverse L-shaped ascending stopper 70 is fixed to the outside thereof.

The cam, which is attached to the drive split pulley 14 and expands and contracts the V-groove width, is composed of a fixed cam 74a integral with the transmission case 10 and a movable cam 74b which is rotatable and slidable. Hydraulic cylinder 73 connected to movable cam 74b
Is connected to a transmission valve 75 attached to the pump 63.

FIG. 6 shows a hydraulic circuit of the speed change valve 75, the steering valve 62, and the lift valve 65.
62 and the lifting valve 65 are connected in series by an oil passage 76 so as to communicate with the pump 63 when they are both in the neutral state, and the lifting valve 65 is pumped more than the steering valve 62 so that it is prioritized. Located on the 63 side, both valves 62, 65
The oil supply passages 77, 78 and the oil passages 80 bypassing the valves 62, 65 are provided with throttle valves 81, 82, 83 to limit the inflow amount, so that it is possible to operate each hydraulic operating portion at the same time. It is possible to install the throttle valve 85 also in the return oil passage 84 of the elevating valve 65.
The hydraulic oil outflow speed from the single-acting hydraulic cylinder 6a that is reduced in operation by its own weight is limited, and the hydraulic oil to the speed change valve 75 is supplied by the oil passage 86.

The operating device of the belt type continuously variable transmission will be described with reference to FIG. 5. A pair of arms 87a, 87b whose openings are opposed to each other in a neutral state are provided on both sides of the front-rear rotation support shaft 71a of the main transmission lever 71.
The arms 88 and 89 projecting forward and backward from the bosses are interlocked with the arms 91 and 92 of the support shaft 90 by rods 93 and 94, and the arm 95 at the end of the support shaft 90 is intermediate. A shaft 97 is connected to an arm 97 by a rod 97a, an intermediate shaft 96 is fixed to a swing arm 96a, and an idle gear 96b also serving as an intermediate gear is rotatably supported at the tip of the swing arm 96a. A hook rod 99 is fixed to a gear 98 which is rotatably supported, and the tip of the hook rod 99 is loosely fitted in a long hole 102 of a plate 101 fixed to the rotary shaft 100. One end projects outside the mission case 10, and the arm 103 fixed to this projection is linked to the arm 104 of the transmission valve 75 attached to the pump 63 via a rod 104a. Further, the gear 10 is provided on one side of the cylindrical body 105 which is fitted to the fixed cam 74a of the continuously variable transmission and covers the overlapping portion with the movable cam 74b.
5a is engraved, a gear 107 fixed to one end of a shaft 106 is meshed with the gear 105a, and an intermediate gear 108 fixed in the other end and inside the transmission case 10 is meshed with the idle gear 96b. There is. Further, the connecting plate 105b welded to the outer periphery of the cylindrical body 105 has a pin 73 at the lower end of the rod of the hydraulic cylinder 73.
An arm 74c fixed to the movable cam 74b is connected to the contact pin 74d that is integral with the arm 74c.

Thus, the L-shaped arm 109 having the front-rear rotation supporting shaft 71a of the main gear shift lever 71 fixed to the upper portion is supported by the fulcrum shaft 109a so as to be rotatable left and right, and the side end portion thereof is the forward-reverse traveling speed changing gear. Since the rod 110 is interlocked with the arm 110 that operates the shifter 37 of the clutch 36, the main shift lever 7
In the state where 1 is positioned in the middle of the lateral groove that is the neutral position, the forward / reverse shift clutch 36 is in the neutral position, and when tilted in the left / right direction, the forward / reverse switching is performed. When tilted forward or backward from the arm 95, the arm 95 rotates downward (accelerates) and the gear 98 moves to the swing arm 96.
Along with a, it rotates while rotating downward, and the hook rod 99 integrated with it rotates the plate 101 downward, thereby opening the transmission valve 75, and the hydraulic oil from the pump 63 is sent to the hydraulic cylinder 73, and the hydraulic pressure is changed. Cylinder 73 extends while connecting plate
Since the pin 74d is pushed down by 105b, the connecting plate 105b and the movable cam 74b rotate to increase the speed. When the movable cam 74b rotates, the gear 105a of the tubular body 105 that is integral with the movable cam 74b rotates, and the gear 98 meshed with the movable cam 74b passes through the gear 107, the intermediate gear 108 in the mission case 10, and the planetary gear 96b. Since the hook rod 99 is rotated in the direction of upward rotation, the shift valve 75 is sequentially closed to complete the predetermined speed-up shift operation. Conversely, when the main gear shift lever 71 is tilted toward the neutral position, the respective parts perform operations opposite to those described above and the hydraulic cylinder 73
Is reduced and slowed down. At that time, the rotation angle of the movable cam 74b is determined by the gears 108, 96b, which are pivotally supported in the mission case 10.
Shift valve with 98, hook rod 99, plate 101, etc.
Since it is fed back to the 75, it is accurately transmitted and mud, straw and other substances do not adhere to the feedback mechanism.

The belt type continuously variable transmission will now be described in more detail. The cylindrical body 1 rotatably fitted around the outer periphery of the fixed cam 74a.
A connecting plate 105b is welded to the outer periphery of 05.
105b is a pin 73a at the lower end of the rod of the hydraulic cylinder 73.
And a movable cam 74b
When the hydraulic cylinder 73 is extended, the connecting plate 105b pushes the receiving pin 74d to rotate the movable cam 74b. The movable split pulley is pushed out to reduce the groove width of the drive split pulley 14, and the movable split pulley of the driven split pulley 18 expands the groove width while compressing the spring 18a, thereby increasing the speed. When the hydraulic cylinder 73 is contracted during deceleration operation, the connecting plate 105b
Is immediately returned and rotated via the pin 73a, and is separated from the receiving pin 74d that is integral with the movable cam 74b on the one hand, and the driven split pulley 18 has a groove width of which is extended by the extension action of the spring 18a attached thereto. Since the V-belt is reduced in size and the winding radius of the V-belt becomes large, the V-belt is pulled toward the driven split pulley side, thereby expanding the groove of the drive split pulley 14, and the movable split pulley and the movable cam 74b are fixed. The cam 74a returns and slides until it overlaps with the cam 74a, and slides backward while maintaining the transmission state.

Therefore, when the hydraulic cylinder 73 contracts like the one in which the rod of the hydraulic cylinder 73 is directly connected to the movable cam,
There is a case where the groove width reduction of the driven split pulley 14 does not follow the expansion of the groove width of the drive split pulley 14 like in the system in which the movable cam 74b rotates in conjunction with it, and the transmission is not interrupted. It can be decelerated without difficulty. In addition,
The hydraulic cylinder 73 described as the reciprocating operation means may be changed to a manual operation means.

Next, the operation system of the side clutch and the side brake will be described. Driving step 8 that constitutes the control unit
The tip of the operation rod 113 connected to the clutch brake pedal 112 (manual operation tool) facing upward is loosely fitted to a pipe 115 fixed by a pin to a receiving member 114 integral with the cylindrical body 105, and the hydraulic cylinder 73 is In the contracted neutral state, the end of the pipe 115 is in contact with and pushed by the receiving nut 113a of the operating rod 113, and the middle part of the pin 115 is attached to the link 116 having an inverted V shape in a side view.
16a is rotatably connected, and when the main shift lever 71 is returned from the desired shift position to the neutral position, the main clutch 17 is disengaged at a portion fitted to the intermediate driven shaft 20 of the link 116. A cam 117 is attached, and the other end overlaps the upper surface of one end of a balance arm 119 pivotally supported by a fulcrum pin 118 on the front surface of the mission case 10. The lower ends 121, 121 of the shifter shafts 120, 120 of the shifters 57, 58 that move the clutch gears 48, 50 constituting the side clutch to the left and right are respectively screwed and fixed to the outer ends of the shifter shafts 120, 120. The other end of the upper arm 122, 122 pivotally attached to the end is pivotally attached to the tubular body 123 so as to form a pantograph shape as a whole, and the coil spring 124 stronger than the return spring attached to the clutch gears 48, 50 is attached to the tubular body. The upper end of a center rod 125, which is a bolt fitted into the body 123 and inserted from below, is connected to the other end of the balance arm 119.

Therefore, when the clutch brake pedal 112 is depressed,
First, since the main clutch 17 is disengaged and the transmission is disengaged, and the link 116 rotates clockwise in FIG. 1, its outer end pushes down one end of the balance arm 119.
As a result, the center rod 125 is pulled up and the clutch gears 48, 50 are disengaged, so that the forward / reverse shift clutch 36 is switched in this state.
Even when the sub-shift is performed with 36 placed in either one, depressing the clutch brake pedal 112 to disengage the main clutch 17 and the clutch gears 48, 50 causes both the input side shaft 25 and the output shaft 26 of the sub-transmission unit. Since it becomes free, it is possible to easily change gears.

If the clutch brake pedal 112 is further depressed from the clutch disengaged state when the aircraft is stopped, the side brakes 51, 52 are released after the side clutch gears 48, 50 are disengaged.
Stops the axle 30 through the braking process. In addition, the coil spring 124 absorbs when the discs of the side brakes 51, 52 are worn, and a nut when adjusting the brake pressure.
The left and right can be adjusted simultaneously with 126. 1
Reference numeral 27 is a pin projecting from the lower arms 121, 121 in an upright posture. When the operation panel 4 is provided with a pair of left and right side clutch levers, these levers are connected via a link.

In the above-described combine, the non-working posture in which the lock shaft 67 is rotated to retract the lowering stopper 69 and the rising stopper 70 out of the ascending / descending locus of the ram 65a and the protrusion 65b protruding from the ram 65a during work or on the road. Then, when the forward / reverse shift clutch 36 is moved left / right by tilting the main speed change lever 71 left / right at the neutral position, it switches to forward or reverse, and the continuously variable transmission moves forward when the main speed change lever 71 is tilted forward from the neutral position. If the sub gear shift lever 41 moves the sub gear shift gear 41 to the left or right, the gear shifts to high speed, medium speed, or low speed by increasing the speed or tilting backward.

Also, tilt the operating lever 59 to the left to turn the steering valve.
62 switches so as to pump the hydraulic oil from the pump 63 to the left oil chamber 60, whereby the spool 53 slides to the right,
The flange 55 on that side is a shifter pivotally supported in the middle.
Since the upper part of 57 is tilted to the right, the clutch gear on the left side
48 breaks, and in this state, the aircraft gently turns to the left, and when the shifter 57 is further tilted, the side brake 51 operates and the aircraft turns sharply to the left.

When turning the machine body to the right, if the operating lever 59 is tilted to the right, the spool 53 slides in the opposite direction to that described above, so the machine body turns to the right.

Furthermore, when adjusting the cutting height, when rotating the aircraft,
Alternatively, when the pretreatment device 7 is moved up and down while traveling on the road, the ram of the up-and-down valve 65 is tilted by tilting the operation lever 59 backward.
65a is pushed down, hydraulic oil from the pump 63 is pumped to the hydraulic cylinder 6a for lifting and lowering, the pretreatment device 7 rises, and tilts forward, the ram 65a is pulled up and the hydraulic oil in the hydraulic cylinder 6a is removed. The pretreatment device 7 is pressed out to the tank by its own weight, and the pretreatment device 7 descends. It should be noted that when the user releases his / her hand from the operation lever 59, it returns to the neutral position by a return spring or the like.

128 of the combine transmission system
Is an engine, 129 is a first blower fan, 130 is a swing sorting body,
131 is a handling cylinder, 132 is a processing cylinder, 133 is a feed chain, 134 is a straw transfer chain, 135 is the most transfer spiral, 136 is the most lifted spiral, 137 is a second blower fan, and 138 is a second transfer spiral. , 139 is the second reduction spiral, 140 is a suction dust removal fan, 141 is a cutter,
142 is a cutting blade, 143 is a grain culm raising chain, 144 is a scraping belt with a rug, 145 is a scraping ring, 146 is a stock carrier transport chain that transports the cut grain culm to a threshing device, and 147 is the same ear side transport chain. , First
In FIG. 0, 148 is a hydraulic lever, 149 is a threshing clutch lever, and 150 is a cutting clutch lever.

(G) Effect of the Invention Since the present invention is configured as described above, when the gear shift device is switched to perform the auxiliary shift operation while traveling, the gear shift device is operated by operating the single manipulating tool provided in the control section. The main clutch on the input side and the left and right side clutches on the output side are disengaged and actuated at substantially the same time, so that the speed change gears constituting the gear speed change device can be easily and easily switched.

[Brief description of drawings]

The drawings show an example applied to a combine as an example of the vehicle of the present invention. Fig. 1 (a) is a side view in which a part of a mission is cut away, and Fig. 1 (b) is a sectional view of part of the same. ,
2 is a developed sectional view of a rear portion and a front portion of the same, FIG. 3 is a longitudinal sectional view of an upper portion of the same, FIG. 4 is a left sectional view of the same as above, FIG. 5 is an exploded perspective view of a speed change operation system, and FIG. Hydraulic circuit diagram, FIG. 7 is a cross-sectional view of the upper part of the operation panel, FIG. 8 (a) is a perspective view of a lifting lock device, FIG. 8 (b) is a front view of the same, and FIG. 9 (a) is a lock state of the same. FIG. 10B is a front view showing the same as FIG.
Figure is a plan view of the driving section, Figure 11 is a right side view of the combine,
FIG. 12 is a left side view with the rear part thereof omitted, and FIG. 13 is a transmission system diagram of an example in which the present invention is applied to a combine. 8 …… Driving step (control section) 10 …… Mission case 14,18 …… Split pulley (continuously variable transmission) 17 …… Main clutch 30 …… Axle 36,41 …… Transmission gear (gear transmission) 48, 50 …… Side clutch 112 …… Clutch Brake pedal (manual operation tool) 113,116 …… Rod, link (connecting member)

Claims (1)

[Scope of utility model registration request] 1. A continuously variable transmission from an engine (14), (18)
And the power transmission transmitted via the main clutch (17) in the transmission case (10), the gear transmission (36),
(41) and a pair of left and right side clutches (48), (50) are transmitted to the left and right axles (30), (30) in the vehicle, the main clutch (17) and the left and right side clutches ( 48) and (50) are provided on the control section (8) via the connecting members (113), (116), ...
A transmission apparatus for a vehicle, characterized in that all of those clutches are disengaged at substantially the same time by the operation of the single manual operation tool (112).