JPH0243792Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a traveling device for a mobile agricultural machine such as a combine harvester, which is equipped with a traveling drive mechanism that drives a traveling crawler, and a parking brake shaft to which a parking brake is installed is incorporated into the transmission. A traveling transmission mechanism is disposed between a parking brake shaft and an axle that transmit the output, and the parking brake is provided so that a braking operation can be performed only when the traveling transmission mechanism is operated to shift, and the parking brake is provided so that the parking brake can perform a braking operation only when the traveling transmission mechanism is in a shifting operation state. By configuring the axle so that the axle can be braked by the parking brake, the parking brake shaft can be decelerated and connected to the axle when the vehicle is stopped, and a relatively large braking force can be obtained with a small braking force of the parking brake. The parking brake can be operated reliably with a relatively small operating force, the parking brake can be made small and lightweight, and it can be manufactured at low cost. Furthermore, the number of shifting axles can be reduced because the parking brake can be operated safely with the desired specifications between the parking brake shaft and the axle. To provide a traveling device for a mobile agricultural machine which can easily increase the number of gears without increasing the number of gears and can obtain a multi-stage gear output suitable for various types of agricultural work using the mobile agricultural machine.

Embodiments of the present invention will be described in detail below based on the drawings.

Fig. 1 is a side view of the combine harvester, and Fig. 2 is a plan view of the same. In the figure, 1 is a truck frame to which a running drive transmission 2 is attached, and 3 is a drive sprocket installed on both sides of the truck frame 1 via a running drive sprocket 4. 5 is a machine supported by the track frame 1; 6 is a threshing machine with a feed chain 7 stretched on the left side and a handling cylinder 8 built therein; Machine stand 5
14 is a straw cutter that faces the end of the straw removal chain 15; 16 is a straw collection table; 17 is an engine that drives each part of the combine; 18 2 is a paddy tank that faces the grain lifting cylinder 19 and stores the grains taken out from the threshing section 6; 20 is a driver's cab equipped with a driver's seat 21 and a driving operation section 22; side clutch levers 23, 23 and a reaping and threshing clutch lever; 2
4 and 25 are provided in front of the driver's seat 21, and a travel gear shift lever 26 is installed inside the driver's cab 20 on the left side of the driver's seat 21 (a position opposite to the side where the operator gets on and off). It is configured to harvest the culm and thresh it.

FIG. 3 is a cross-sectional view of the traveling drive transmission 2. In the figure, reference numeral 27 is a main transmission gear 29 which pivotally supports an input pulley 28 which is interlocked and connected to the engine 17 via a traveling clutch (not shown). ,3
a power input shaft for slidably engaging and supporting the 0; 31;
35 is provided with a parking brake 32 on one side and supports the counter gears 33 and 34 that mesh with the gears 29 and 30, and 35 is connected to the brake shaft 31 through gears 36 and 37 that are always in mesh with each other. The input shaft 27 is a sub-transmission shaft which is interlockingly connected and slidably engages and supports the propulsion sub-transmission gears 38 and 39. with free rotation shaft support, each gear 3
6 and 41 are always in mesh with each other, and a reverse gear 42 that meshes with the gear 29 is freely rotatably supported on the sub-transmission shaft 35.
A reverse gear 42 is interlocked and connected to each shaft 27, 3, and a traveling transmission mechanism 45 for main transmission consisting of gears 29, 30, 33, 34, 41, 42 is connected to each shaft 27, 3.
Provided between 1 and 2.

In addition, 46 and 46 in the figure are the gears 38 and 39.
The side clutch shafts 51 and 51 support the counter gears 47 and 48 that mesh with each other and the side clutch gears 49 and 50 with claws that engage and disengage the gears 47 and 48, respectively.
3 is connected to the side clutch fork to switch and displace each gear 49, 50, and 52, 52 is a side clutch fork that locks gears 49, 50 to transmission housing 53a when each gear 47, 48 and 49, 50 are disengaged. The brake pawls 53, 53 are axles that engage and support the traveling drive sprockets 4, 4 and final gears 54, 54, which are always in mesh with the gears 49, 50, respectively, and the respective gears 38,
A traveling transmission mechanism 55 for auxiliary transmission consisting of 39, 47, and 48 is provided between the brake shaft 31 and the axles 53, 53.

As shown in FIGS. 3 to 6, a main transmission rod 56 is supported on the upper part of the transmission housing 53a, and a main transmission arm 57 is mounted on the outer upper end of the rod 56.
Also, a main transmission shift fork 59 is provided, which fixes a transmission plate 58 to the inner lower end of the rod 56, and engages the transmission plate 58 to slidingly displace the main transmission gears 29, 30. 59 is slidably supported by a fork shaft 60, and is configured to perform a main speed change operation of one reverse speed and three forward speeds. In addition, the sub-transmission gear 38,
Sub-transmission shift fork 61 that slides and displaces 39
A sub-shift arm 62 interlockingly connected to the shift fork 61 is attached to the back of the transmission housing 55 via a sub-shift rod 63, and a low-speed and high-speed wire 65 for sub-shift is stretched through an outer receiving bracket 64. , 66 are connected to the sub-transmission arm 62. A brake regulation pin 68 is slidably attached to the bracket 64 via a guide tube 67.
, and connect the tip of the pin 68 to the sub-shift arm 6.
2, and attach the pin 6 to the arm 62 in the neutral position.
At the same time, the pin 6 is brought into contact with the brake arm 69 of the parking brake 32 via the link 70.
8 and displacing the arm 62 to either a low speed or high speed shift position, the pin 68 slides in conjunction with the brake arm 69, and the parking brake 32 is actuated to stop the traveling crawler. 3 is formed to brake. urging a return spring 71 to the brake arm 69 and connecting a coupling plate 72 to the arm 69;
Parking brake and foot brake wires 74 and 75 are stretched through an outer receiving bracket 73 provided on the front side of the transmission housing 53a, and each wire 74 and 75 is connected to the coupling plate 72, and a brake pedal provided on the driver's cab 20 is connected. (not shown) is formed so as to connect the wire 75.

7 to 9 are enlarged views of the traveling speed change lever 26. A lever mounting frame 76 is fixed on the left side of the operator's cab 20 (a position opposite to the side where the operator gets on and off), and the frame 76 is A fulcrum shaft 77 is fixed to the fulcrum shaft 77, a bearing tube 78 which can be freely rotated back and forth and left and right is fitted to the fulcrum shaft 77, a lower end of the traveling speed change lever 26 is fixed to the bearing tube 78, and the middle of the lever 26 is fitted. A shift guide plate 80 having a shift display guide groove 79 is provided, and the guide plate 80 is removably attached to the frame 76 via screws 81, and the shift lever 26 is moved forward, backward, left, and right along the guide groove 79. Form it so that it is tilted. The tip of the main shift operation plate 82 supported by the fulcrum shaft 77 is fitted near the lower end of the traveling shift lever 26, and the plate 8 is moved in conjunction with the lever 26, which swings back and forth about the fulcrum shaft 77.
A plate 82 is attached to the lever 26 in order to displace the lever 26.
At the same time, the plate 82 and the main shift arm 57 are interlocked and connected by a connecting rod 83, and the lever 26 is tilted back and forth to perform a main shift operation. A fulcrum bracket 84 is fixed to the frame 76, and the tip of an auxiliary speed change plate 86 supported by the bracket 84 via a pin 85 is fitted near the lower end of the travel speed change lever 26, and the bracket 84 which holds the pin 85 therebetween is fitted. Pins 87, 88 and adjustment springs 8 at both ends
9,89 through the above low speed and high speed wires 6
5 and 66 are connected and the lever 26 is swung in the left-right direction, which is the axial direction of the fulcrum shaft 77,
The plate 86 is configured to move left and right in conjunction with the lever 26 and pull the wires 65 and 66 to perform a sub-shift operation. The low speed wire 6
5, the parking brake wire 74 is connected to one side of the plate 86 through a pin 87 and a link 91 having an elongated hole 90, and the parking brake wire 74 is connected to one side of the plate 86 through a pin 87 and a link 91 having an elongated hole 90. The continuous parking brake guide groove 92 is connected to the speed change guide plate 8.
0, set the main transmission to the neutral position and the auxiliary transmission to the low speed position, displace the traveling transmission lever 26 along the parking brake guide groove 92, and swing the brake arm 69 by pulling the wire 74,
The parking brake 32 is configured to actuate the parking brake 32 to perform a braking operation.

The present invention is constructed as described above, and when the traveling speed change lever 26 is swung back and forth, the lever 26
The main transmission arm 57 and the main transmission shift fork 59 are displaced via the connecting rod 83 interlocked with the main transmission gears 29 and 30, respectively.
4, 42 or pawl clutch 40, 40
By engaging the respective gears 30 and 41 through the wires 65 and 66, the main speed change operation of 1 reverse speed and 3 forward speeds can be performed, and when the traveling speed change lever 26 is swung left and right, the sub gears are engaged through the low speed and high speed wires 65 and 66. The transmission arm 62 and the sub-transmission shift fork 61 are displaced to engage the sub-transmission gears 38 and 39 with the respective gears 47 and 48 to perform low-speed and high-speed sub-shift operations, including reverse 2nd speed (R1, R2) and 6 forward speeds (1-2-5, 3-
The traveling speed change operation of 4-6) is performed using the traveling speed change lever 26 to move the combine harvester at a desired speed. When the combine harvester is stopped, the traveling gear shift lever 26 is returned to the position where the main gear is set to neutral N, and the lever 26 is tilted in the direction where the auxiliary gear is set to a low speed.
When the lever 26 is engaged and the lever 26 is moved to the parking brake position P, the variable speed gears 29, 30 are in a non-meshing state with any of the gears 33, 34, 41, 42, and the low speed sub-speed gear 38 is engaged. and gear 4
7 is engaged, the parking brake 32 is activated and the parking brake shaft 31 and the side clutch gear 4 are engaged.
By operating the side clutch lever 23, the side clutch gear 50 or 49 is set to each gear 4.
7, 48, the gear 50 or 49 is locked to the transmission housing 53a via the handbrake pawls 52, 52 to keep the traveling crawler 3 stopped and to change the traveling main shift (traveling output). After setting the vehicle to neutral and setting the travel sub-shift (travel output) to a low speed, actuate the parking brake 32, and displace the lever 26 to a desired travel shift position after releasing the parking brake 32;
That is, by operating the parking brake 32, the traveling transmission mechanism 55 automatically shifts to a lower speed.

In the above embodiment, the parking brake 32 is interlocked and connected to the traveling speed change lever 26 via the parking brake wire 74, and the brake 32 is actuated by operating the lever 26.
A new parking brake lever to which the parking brake wire 74 is connected may be installed in the driver's cab 20, and when the auxiliary speed change traveling transmission mechanism 55 is in the neutral position, even if the parking brake lever is operated, the brake regulation pin 68 will not be activated. contacts the auxiliary transmission arm 62 to prevent the operation of the parking brake 32, and to shift the mechanism 55 to either low speed or high speed by operating the traveling speed change lever 26, displacing the auxiliary transmission arm 62. The parking brake 32 can be actuated by the parking brake lever via the wire 74 only when the parking brake lever is turned on.

As shown in the embodiments above, the present invention has an engine 17
A traveling transmission mechanism 55 is disposed between the parking brake shaft 31 and the axle 53 that transmit the output, and a parking brake 32 is provided so as to be able to perform a braking operation only when the traveling transmission mechanism 55 is operated to change gears. The axle 53 is configured so that the parking brake 32 can brake the axle 53 through the travel transmission mechanism 55. When the vehicle is stopped, the parking brake shaft 31 can be decelerated and connected to the axle 53, and the small braking force of the parking brake 32 can be used to generate a relatively large amount of braking force. A braking force can be obtained, the brake 32 can be operated reliably with a relatively small operating force, the parking brake 32 can be made small and lightweight, and can be manufactured at low cost. Since the speed can be changed safely with the desired specifications, the number of speeds can be easily increased without increasing the number of speed change axes, and a multi-speed speed output suitable for various types of agricultural work with mobile agricultural machinery can be obtained. The traveling drive transmission 2 can be produced compactly at low cost, and has remarkable effects such as being extremely practical.

[Brief explanation of the drawing]

Fig. 1 is a side view of a combine harvester showing an embodiment of the present invention, Fig. 2 is a plan view of the same, Fig. 3 is a sectional view of the traveling drive transmission, Fig. 4 is a side view of the same, Figs. The figure is a partial explanatory view, Figure 7 is a cross-sectional side view of the traveling gear shift lever portion, and Figure 8 is a cross-sectional rear view of the same.
FIG. 9 is a partial plan view thereof. 17...Engine, 31...Parking brake shaft,
32... Parking brake, 53... Axle, 55...
Traveling transmission mechanism.

Claims (1)

[Scope of utility model registration request] Parking brake shaft 3 transmitting engine 17 output
A traveling transmission mechanism 55 is disposed between the traveling transmission mechanism 55 and the axle 53, and a parking brake 32 is provided so as to be able to perform a braking operation only when the traveling transmission mechanism 55 is operated to change the speed. A traveling device for a mobile agricultural machine, characterized in that an axle 53 can be braked by the parking brake 32.