JPS5925695Y2 - Traveling speed control device for combine harvesters - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an operating device for changing the traveling speed of a self-propelled, self-extracting combine harvester.

In conventional combine harvesters, a main transmission mechanism and an auxiliary transmission mechanism are provided in the power transmission section to the rollers that are driven by the engine, and the auxiliary transmission mechanism further changes the speed of what has been changed by the main transmission mechanism. The traveling speed is changed by the following.

However, when shifting speeds using the main and auxiliary speed mechanisms, it is possible to accidentally shift the auxiliary shift lever to the high speed position while the main shift lever is in the reverse position, or to shift the auxiliary shift lever to the high speed position. There is a risk that the main gear shift lever may be accidentally put into the reverse position while the combine harvester is in the reverse position.In such a situation, the combine harvester will unexpectedly travel backwards at high speed, which is extremely dangerous. Because of the location of the pilot, it is more dangerous to unexpectedly retreat at high speed due to an operational error.

The present invention is a combine harvester equipped with a traveling transmission consisting of a main transmission mechanism and a sub-transmission mechanism. By providing a simple mechanism that prevents the main gear shift lever from moving into the reverse position when the sub-shift lever is placed in the high-speed position, the system prevents unexpected high-speed reversing due to operational errors and improves safety. It has improved characteristics.

Next, an example of the present invention will be explained with reference to a drawing. The figure shows a walking type combine harvester. In the figure, 1 is a machine body supported by a pair of running rollers 2, 2, and a foot A threshing device 3 with a chain 4 is provided, and an engine 5, a threshing removal section 6, and an operation column 7 are provided on the right side.

Reference numeral 8 denotes a culm pretreatment device installed at the front of the fuselage 1 so as to be raised and lowered by a hydraulic cylinder 9. The pretreatment device 8 includes a pair of weeding bodies 10.10 and a culm lifting mechanism 11.11°. It is composed of a culm scraping wheel 12, 12 and a reaping mechanism 13.

Further, 14 is a vertical conveyance device for conveying the harvested culms to the foot chain 4. The upper end of the conveyance device 14 is pivotally supported at the lower part of the starting end of the foot chain 4, and the lower end is attached to a belt attached to the body 1 side. It is suspended from the tip of the crank lever 15 via a rod 16, and is configured to be swung by rotation of the lever 15 to adjust the length of the culm.

Belt 1 from output shaft 17 of engine 5 to hydraulic pump 18
On the other hand, the power is transmitted to the intermediate shaft 20 by a belt 21 with a tension roller 22, and the power is transmitted from the intermediate shaft 20 to the threshing device 3, the foot chain 4, the vertical conveying device 14, and the sorting device 23 located below the threshing device 3. power is transmitted to each.

Further, power is transmitted from the output shaft 17 of the engine 5 to the input shaft 25 of the traveling transmission 24 via a belt 26 with a tension roller 27, and from the input shaft 25 via a belt 28 with a tension roller 29 to each of the pre-processing devices 8. The traveling transmission device 24 is equipped with a main transmission mechanism having a reverse travel shift position, and a sub-transmission mechanism that further changes the rotation speed after being shifted by the main transmission mechanism. It is adapted to drive rollers 2, 2.

The operation column 7 is connected via a wire 30 to a tension roller 27 in a belt 26 between the engine output shaft 17 and the transmission input shaft 25, and tensions or loosens the belt 26 to turn on power transmission. , a main clutch lever 31 that is turned off is provided, and the power is transmitted in conjunction with the tension roller 22 of the belt 21 to the intermediate shaft 20 and the tension roller 29 of the belt 28 to the pre-processing device 8 via wires 32 and 33. ON, O
A reaping and threshing clutch lever 34 for FF is provided,
The operation column 7 also includes a reaping lift lever 35 for lifting and lowering the pretreatment device 8 by operating the hydraulic cylinder 9;
A long/short culm adjustment lever 3 for swinging the vertical conveyance device 14 in conjunction with the bell crank lever 15 via a connecting rod 36.
7 is provided.

Further, on the upper surface of the operation column 7, a main shift lever 38 for operating the main transmission mechanism of the traveling transmission 24 and a sub-shift lever 39 for operating the auxiliary transmission mechanism are arranged in parallel.
The main shift lever 38 is connected to the guide groove 41 in the guide plate 40.
The R position is for reverse gear shifting, the ■ position is for 1st speed forward gear shifting, and the II position is for reverse gear shifting.
It is configured to shift forward at 2nd speed at the color position, and when the auxiliary shift lever 39 is moved from the neutral position N where power is not transmitted to the H position of the guide groove 42, it becomes a high speed shift, and when it is moved to the L position, it becomes a low speed shift. It is configured to be.

In this case, the operating direction of the main shift lever 38 to the reverse shift position R and the operating direction of the auxiliary shift lever 39 to the high speed shift position H are set to be the same direction.

A long slot 43 is provided in the guide plate 40 of the operation column 7 in a direction substantially perpendicular to the operating direction of the surface erosion speed lever 38, 39, and a sliding piece 44 is slidably fitted into the slot 43.
screw 45 with handle 46 from the top surface of guide plate 43.
are screwed together and fastened by rotating the handle 46 to open the long slot 4.
A private room can be created at any position on 3, and this sliding piece 4
4, an L-shaped regulation lever 47 is fixed with a pin 48 so as to be horizontally rotatable, and as the regulation lever 47 rotates, one end 47 of the regulation lever 47 is placed in the R position of the main shift guide groove 41, and the other end 47 is '' at the H position of the sub-transmission guide groove 42, and move the regulating lever 47 to its pivot pin 4.
When the sliding piece 44 comes to a position on the longitudinal extension of the guide groove 41 for the main shift lever 38, by pressing the stopper 44' with a spring 49 wound around the main shift lever 38, , one end 47' of the regulation lever 47 is located at a location opposite to the sub-shift lever 39 from the reverse shift position R of the main shift lever 38, and the other end 47'' is located at the high-speed shift position H of the sub-shift lever 39, When the sub-shift lever 39 is placed in the high-speed shift position H, the regulation lever 47 rotates in a direction that resists the force of the spring 49, and its one end 47'
is located at the reverse gear shift position R of the main shift lever 38.

A lug 50 is provided at the base of the lift lever 35, and a hook-shaped locking rod 51 is slidably provided on the side surface of the operation column 7, so that the lift lever 35 can be moved to the maximum raised position of the preprocessing device 8. When the locking lever 51 is moved out against the spring 52, the tip of the locking rod 51 is fitted into the pull of the lug 50, thereby locking the lifting lever 35 at the maximum raised position. ing.

In this configuration, the sub-shift lever 39 is at the high-speed shift position H.
If the main gear shift lever 38 is set to the R position,
The rightward rotation of the L-shaped regulation lever 47 is the main shift lever 3.
8, the sub-shift lever 3 is blocked in this state.
9 to the high speed shift position H, the auxiliary shift lever 39 remains at the other end 47 of the regulation lever 47, which is in a non-rotatable state.
'' and cannot shift to the high-speed shift position H, and the neutral position N of the sub-shift lever 39 is made clear.

Further, when the main shift lever 38 is in a position other than the R position, when the sub shift lever 39 is put into the high speed shift position H, the regulation lever 47 is moved to the right by the sub shift lever 39 against the spring 49 as shown in FIG. The main shift lever 38 rotates, and its one end 47' is located at the R position of the main shift lever 38, so even if you try to put the high shift lever 38 in the R position in this state, it will come into contact with the one end 47' of the regulation lever 47 and will not be placed in the R position. They are prevented from entering.

In this case, the regulation lever 47 does not operate when the main shift lever 38 is in the ■ or II position and the auxiliary shift lever 39 is in the L or H shift position, so that it does not interfere with the shifting of the four forward gears. In addition, if the regulating lever 47 is moved along the long slot hole 43 as shown by the two-dot chain line in FIG. The relationship will be terminated.

As described above, the present invention provides a traveling transmission for a combine in which the rotation of the engine is shifted by a main transmission mechanism with a reverse gear, and the rotation after being shifted by the main transmission mechanism is shifted by an auxiliary transmission mechanism. A main shift lever that operates the transmission mechanism and an auxiliary shift lever that operates the auxiliary shift mechanism are arranged such that the operating direction of the main shift lever to a reverse gear shift position and the operating direction of the auxiliary shift lever to a high speed shift position are the same direction. A guide plate having a guide groove for the main shift lever and a guide groove for the auxiliary shift lever is arranged in parallel so that the regulation lever can be pivoted to a position on an extension line of the guide groove for the main shift lever. Arrived,
When one end of the regulation lever is in a position away from the reverse shift position of the main shift lever in the opposite direction to the auxiliary shift lever, the other end of the regulation lever is located at the high speed shift position of the auxiliary shift lever, and the auxiliary shift lever is shifted to a high speed shift position. It is formed in an L-shape so that the other end moves out of the high speed shift position and one end moves to the reverse shift position on the main shift lever at the same time. Since reversing can be restricted by rotating the control lever, reversing can always be done at low speeds, preventing workers from unexpectedly reversing at high speed against their will, and improving the safety of reversing. It can improve your sexual performance, and
Since the present invention performs the above-mentioned regulation by rotating the regulation lever,
The structure is significantly simpler than the one using multiple gate plates as in Publication No. 53, and the shift operation of the main gear shift lever and the auxiliary gear shift lever does not require large resistance and twisting due to the sliding of the multiple gate plates. This has the effect of not impairing the speed change operation of the main shift lever and the auxiliary shift lever.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a side view of the walking combine harvester, Fig. 2 is a plan view thereof, Fig. 3 is a diagram showing the power transmission system, and Fig. 4 is a sectional view of the operating column. , Fig. 5 is an enlarged plan view of the main part of the operation column, and Fig. 6 is a VI- of Fig. 5.
VI sectional view, FIG. 7 is an operational view of FIG. 5. 1... Aircraft, 2... Running roller, 2
4...Traveling transmission, 38...Main gear shift lever, 39...Sub-shift lever, 47...
・Regulation lever

Claims (1)

[Scope of utility model registration request] A traveling transmission for a combine harvester in which the rotation of an engine is shifted by a main transmission mechanism with a reverse gear change, and the rotation after being shifted by the main transmission mechanism is shifted by a sub-transmission mechanism, wherein the main transmission mechanism operates the main transmission mechanism. A lever and an auxiliary transmission lever for operating the auxiliary transmission mechanism are arranged side by side so that the direction of operation of the main transmission lever to a reverse gear shift position and the direction of operation of the auxiliary gear shift lever to a high speed shift position are the same direction, A regulation lever is rotatably pivoted to a guide plate having a guide groove for the main shift lever and a guide groove for the auxiliary shift lever at a position on an extension line of the guide groove for the main shift lever. , when one end thereof is in a position away from the reverse gear shift position of the main gear shift lever in the opposite direction to the auxiliary gear shift lever, the other end is located at the high speed shift position of the auxiliary gear shift lever, and the auxiliary gear shift lever is placed in the high gear shift position. A travel shift operating device for a combine harvester, which is formed in an L-shape so that one end rotates so that the other end moves out of a high speed shift position and one end is placed in a reverse shift position on a main shift lever.