JPH1175494A - Body moving apparatus for combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve controllability of a combine harvester, by controlling the change of the right and left balance of a machine body caused by the change of the amount of grain in a grain tank and to eliminate the sliding movement of a traveling part and a working part while relatively moving the traveling part and the working part by hydraulic cylinders. SOLUTION: This body moving apparatus is equipped with relatively moving mechanisms 22 and 23 for a traveling part 27 furnished with a crawler, an operating part and an engine and for a working part 25 furnished with a reaping part and a threshing part so as to slide and move a grain tank to the left side with increase in the amount of grain recovered. The relatively moving mechanisms 22 and 23 are composed of hydraulic cylinders 22 and 23 to be hung from a traveling frame 27 constituting the traveling part 27 to a working frame 25 for constituting the working part 25. The apparatus is equipped with a lock mechanism R which is an externally extending cam type brake capable of mechanically controlling the relative movement between a rod 23A and a cylinder 23a in the rear hydraulic cylinder 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine having a working unit and a traveling unit which can be moved relative to each other, and more specifically, a driving unit is integrated with a traveling device to maintain a good steering feeling. The present invention relates to a technique for improving the right and left weight balance while keeping a state, and a technique for preventing a shift movement due to a leak between a working unit and a traveling unit.

[0002]

2. Description of the Related Art Conventionally, a mowing part lateral slide structure in which a mowing part is movable to the left and right with respect to the machine body to obtain both a state suitable for middle splitting and a state suitable for round cutting. Is known (Japanese Patent Laid-Open No. 5-1538).
No. 41 publication).

[0003]

In a combine, a threshing unit is usually located on the left side of the fuselage, and a grain storage unit such as a Glen tank or a bagging hopper is located on the right side. Since the grains that have been threshed are stored in the grain storage section, the right side of the aircraft gradually becomes heavier. Therefore,
Regardless of whether the reaping unit can be slid horizontally or not, when the kernels are full of kernels, the center of gravity is shifted to the right, and the right crawler sinks sharply in wetlands. It sometimes had a bad influence on running performance, such as difficulty in turning and difficulty running straight. It is an object of the present invention to improve the maneuverability of a combine by preventing the left-right balance of the aircraft from changing as much as possible even when the load of the grain storage unit changes.

[0004]

[Means for Solving the Problems]

[Configuration] A first invention is a crawler traveling device, an operation unit,
A traveling unit comprising a traveling unit equipped with an engine and a working unit equipped with a cutting unit, a threshing unit, and a grain storage unit, which is provided with a relative movement mechanism capable of adjusting the relative movement in the left-right direction of the aircraft. A relative movement mechanism is provided by providing a hydraulic cylinder erected over the frame and a working frame constituting a working unit, and a lock mechanism capable of mechanically preventing relative movement between the rod and the cylinder cylinder in the hydraulic cylinder. It is characterized by being provided.

According to a second aspect of the present invention, in the first aspect, the locking mechanism is a negative brake that prevents relative movement between the rod and the cylinder cylinder in a non-operating state and allows relative movement between the rod and the cylinder cylinder in an operating state. It is characterized by having been constituted.

According to a third aspect of the present invention, a traveling unit including a crawler traveling device, an operating unit, an engine, and a working unit including a cutting unit, a threshing unit, and a grain storage unit are arranged in a lateral direction of the machine body. A relative movement mechanism capable of adjusting relative movement; a traveling frame constituting the traveling section; and a hydraulic cylinder spanning a work frame constituting the working section. A cover member is provided, and the cover member is configured to be fitted between a tip end portion of the rod and an end surface of a cylinder cylinder on a rod side so as to prevent the hydraulic cylinder from shortening. The cover member is dimensioned such that it can be fitted only in the most extended state of the hydraulic cylinder.

[Operation] According to the configuration of claim 1, (A)
The relative movement of the traveling unit including the crawler traveling device, the driving unit, and the engine, and the working unit including the cutting unit, the threshing unit, and the grain storage unit can be adjusted in the left-right direction of the machine body. If the storage unit becomes heavy and the left-right balance changes, the running unit and the working unit can be moved relative to each other to absorb the change in balance. It is possible to maintain a predetermined state.

[0010] (b) Since the operating unit is integral with the traveling unit, the positional relationship between the operating unit and the crawler does not change regardless of the lateral movement of the working unit. For example, when the operating unit is integrated with the working unit, the grain storage amount in the Glen tank increases during work traveling, and when the working unit moves left, the operating unit also moves left, Although it is conceivable that the airframe has shifted from the line due to the change, the line of sight does not change even if the working unit moves sideways, so it is possible to maintain a constant steering feeling. It is possible and it is easy to drive. In addition, since the engine is also provided in the traveling section, there is no need to provide a structure capable of lateral movement in the transmission system between the engine and the crawler traveling device, so that a conventional simple structure can be used.

(C) In the means for relative movement by the hydraulic cylinder, when the vehicle is stopped on the ground inclined to the left and right, reverse pressure acts on the hydraulic circuit from the hydraulic cylinder by its own weight, and therefore, the hydraulic cylinder and the traveling unit are caused to leak. Although there is a risk of inconvenience, such as displacement of the working part and oil leakage from the seal part, there is a lock mechanism that can mechanically prevent relative movement between the rod and cylinder cylinder in the hydraulic cylinder. By operating the mechanism, the back pressure is prevented from acting on the hydraulic cylinder, and the above-mentioned disadvantages are eliminated, so that the hydraulic circuit can be protected.

According to the second aspect of the present invention, (d) the lock mechanism prevents the rod and the cylinder from moving relative to each other in a non-operating state, and allows the relative movement between the rod and the cylinder from operating. Since the brake is configured, when the combine is stopped and left, the left and right movement of the vehicle body is always mechanically locked, and the locked state is maintained until the next move. For example, even when the vehicle is stopped on the ground inclined left and right, the left and right balance of the vehicle body does not change due to leakage until the next ride.

According to the third aspect of the present invention, the above (a),
There is the action of (b) and the action of (e) below. (E) Since the rod cover is provided on the hydraulic cylinder for moving the vehicle body left and right, the rod can be prevented from being damaged by mud, stones and the like, thereby contributing to prevention of operation failure and oil leakage. And, when the hydraulic cylinder is in the most extended state,
If the cover is fitted between the rod end and the cylinder cylinder end surface, a locked state in which the hydraulic cylinder does not move in the extending direction and the contracting direction can be realized. Accordingly, if the traveling unit and the working unit are shifted to the left or right and the hydraulic cylinder is locked by the cover, the displacement between the traveling unit and the working unit will not occur regardless of the inclination of the ground. To stop the combine.

[Effect] In the combine according to any one of the first to third aspects, the operation (a) and the operation (b) allow the operation unit and the engine to be integrated with the crawler traveling unit to work with the traveling unit. By moving the unit relatively to the side, it is possible to maintain a constant relationship between the driving unit and the traveling place without complicating the traveling power transmission system and make it easy to steer, while the grain storage unit side becomes heavier with the work progress As a result, changes in the left-right balance can be corrected, and driving performance and maneuverability can be improved.

In the combine according to the first aspect of the present invention, due to the action (c), (b) a hydraulic cylinder constituting a relative movement mechanism is provided, and the traveling part is leaked regardless of the inclination of the place where the combine is placed. Inconveniences such as displacement of the working part and oil leakage from the seal part can be prevented,
The hydraulic circuit can now be protected.

According to the second aspect of the present invention, there is an advantage that the effect (b) can be obtained by the operation (d) without forgetting the operation when the machine is stopped.

According to the third aspect of the present invention, there is provided a cover for protecting the rod of the hydraulic cylinder for moving the vehicle body by the operation (e). A rational means that can also be used for the motion prevention function was realized.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. Figure 1 shows a side view of the combine.
2 is a plan view, wherein a is a cutting section, b is a threshing section, c is a grain storage section, 1 is a crawler traveling device, 2 is an operating section, 3 is an engine 4 and a transmission 24. Power unit.

The reaping unit a includes a raising device 5, a reaping device 6,
It is provided with a vertical transport device 7 and the like, and can be moved up and down with respect to the machine body. The threshing unit b includes a feed chain 8, a handling room 10 having a handling cylinder 9, a swing sorting device 11, a straw cutter 12, and the like, and is mounted on the left side of the machine. Grain container c
Comprises a grain tank 13 for storing the grains sent from the threshing unit b, an unloader 14 for discharging the grains collected in the grain tank 13 outside the machine, and the like.

In this combine, the crawler traveling device 1
And a working unit B having a cutting unit a, a threshing unit b, and a grain storage unit c. The traveling unit A includes a cutting unit a, a threshing unit b, and a grain storage unit c. A moving mechanism 15 is provided.

As shown in FIGS. 1, 4 to 6, the traveling section A
Include left and right track frames 19, 19 each having a driving sprocket 16, a tension wheel 17, and a plurality of driven wheels 18.
And a traveling machine base 2 supporting these via an elevating mechanism 20.
1 and a traveling frame 27 for mounting and supporting the driving unit 2 and the driving unit 3, and includes front and rear hydraulic slide cylinders 22 and 23.

As shown in FIG. 1, FIG. 4, FIG. 5, and FIG. 7, the working section B mounts and supports a cutting section a, a threshing section b, a Glen tank 13, a fuel tank 26, etc. It is slidably supported in the left-right direction with respect to the traveling frame 27 by applying a rail structure. The rear hydraulic cylinder 23 is configured to penetrate both ends, and its pipe cylinder cylinder 23a is
7 is also used as a member connecting left and right, and both ends of the piston rod 23A are connected to left and right ends of the rear portion of the working frame 25. The front hydraulic cylinder 22 is also configured to have a short-length penetrating type at both ends. The cylinder cylinder 22a is fixed to the traveling frame 27, and both ends of the piston rod 22A are connected to left and right ends of a front portion of the working frame 25. .

As shown in FIG. 8, four rods 22A,
The 23A working frame 25 is connected via a rubber coupling F. The rubber coupling F has a rubber portion 5
1 and mounting portions 50, 50 on both sides thereof. One mounting portion 50 is fixed to the ends of the rods 22A, 23A, and the other mounting portion 50 is fixed to the work frame 25, respectively.

The piston rods 22A of each hydraulic cylinder,
23A connects the left and right end rods 22c, 23c for forming the oil chambers 22b, 23b with the connecting pipe 22.
It is formed in a long shape connected by d and 23d. That is, the work frame 25 is configured to be slidable left and right within a predetermined range with respect to the traveling frame 27 by the left and right hydraulic cylinders 22 and 23 being driven to move left and right. The situation of the slide movement is as follows.

That is, the amount of leftward projection of the left side plate 28 of the threshing unit b from the left crawler 1L to the left is substantially equal to the amount of rightward projection of the right side plate 13a of the Glen tank 13 from the right crawler 1R. , A standard position where the working unit B projects left and right and laterally from the traveling unit A by a predetermined amount [see FIG.
From the standard position to the moving position (see FIG. 3B) where the working unit B has moved most to the left side opposite to the grain storage unit existing side with respect to the traveling unit A (see FIG. 3B). The relative position between the working unit B and the traveling unit A is moved by the relative moving mechanism 15 including the cylinders 22 and 23. The moving distance between the standard position and the moving position is determined by the hydraulic cylinders 22, 23.
Is the operation length.

As shown in FIGS. 5, 6, and 10 to 12, an engaging means H capable of restricting relative movement between the traveling frame 27 and the working frame 25 is provided, and the traveling section A and the working section B are provided.
Is set to a predetermined relative set position, the engaging means H is activated. The work frame 25 is mounted on a plurality of inclined rollers 52 mounted on the traveling frame 27, and has a structure in which the roller 52 relatively moves by rolling on the rolling surface 53 on the work frame side. At two positions, that is, the position where the Glen tank 13 moves to the rightmost position and the position to the leftmost position, the rolling surface 53 is formed with concave portions 53a, 53a into which the rollers 52 enter. In both positions, even when the positioning function of the hydraulic cylinders 22 and 23 is incomplete due to leakage or the like, the operation of the engaging means H causes the traveling portion a
First, the relative positional deviation between the work part b and the work part b does not occur.

As shown in FIGS. 8 and 9, a lock mechanism R is provided which can mechanically prevent the relative movement between the rod 23A and the cylinder tube 22a in the hydraulic cylinder 23. That is, a brake shoe 54 in which a shoe lining 54a slidable on the outer periphery of the rod 23A is attached to the inner diameter side.
Are provided over a brake cam 57 provided on the brake panel 55 and an anchor pin 58, and a geared motor 56 is provided which acts on a cam shaft 57a of the brake cam 57 to rotate the lock mechanism R. Is configured.

The brake panel 55 includes a brake cam 57
Are rotatably supported, and the anchor pin 58 is fixedly supported by planting and fixed to the cylinder tube 23a by external fitting and bolting. A pair of brake shoes 54, 54 are provided with springs 60, 60 provided on both sides of the shoes on both the anchor pin side and the brake cam side.
Oval cam 57
In a non-contact state where the pressing surface 54b of the brake shoe 54 is parallel to the pressing surface 54b (the state of FIG.
A pair of shoe linings 54a, 54a
Comes into strong contact with the outer periphery of the rod 23A, and the lock state is established in which the relative movement between the rod 23A and the cylinder cylinder 22a is prevented.

A geared motor 56 for driving the brake cam 57 is mounted on the brake panel 55, and a cam shaft 57a is fitted into a shaft hole of an output gear (not shown) of the output shaft (not shown) by means of triangular teeth serration or the like so as to rotate integrally. It is. Therefore, in the locked state shown in FIG. 9A, when the geared motor 56 is energized, the cam 5 is pressed against the urging force of the spring 60.
7, the pair of brake shoes 54, 54 are pushed and expanded in the outer diameter direction, so that the shoe linings 54a, 54
When the contact between the rod 23A and the outer periphery of the rod 23A is cut off, the lock is released, and the rod 23A and the cylinder cylinder 22a are allowed to move relative to each other (the state shown in FIG. 9B).

As shown in FIG.
And the ignition switch 61 are connected to the control device 3 described later.
7, when the engine 4 is running, an unlocked state in which the hydraulic cylinder 23 can be freely moved appears automatically. When the engine 4 stops, the relative movement between the rod 23A and the cylinder cylinder 23a, that is, A locked state in which the relative movement between the traveling unit A and the working unit B becomes impossible is automatically displayed. That is, the lock mechanism R prevents the relative movement between the rod 23A and the cylinder cylinder 23a in a non-operating state,
It is configured as a negative brake that allows relative movement between the rod 23A and the cylinder cylinder 23a in the operating state.

In this combine, a control circuit is provided so that various controls for moving the relative movement mechanism 15 are performed. That is, a grain amount detection stage 41 capable of detecting the amount of grain stored in the Glen tank 13 is provided.
Slide control means C for linking the grain amount detection stage and the relative movement mechanism 15 so that the working unit B moves to the left with respect to the traveling unit A as the amount of kernel stored in the slide unit 3 increases; The control device 37 is provided with mode switching means 39 for switching between an automatic control mode in which the control means C operates and a manual control mode in which the traveling unit A and the work unit B are relatively moved and adjusted by manual operation.

That is, as shown in FIG. 13, the electromagnetic control valves 38 of the front and rear hydraulic cylinders 22 and 23, the mode changeover switch 39, the left and right moving lever 40 for operating the electromagnetic control valve 38, and the lower part of the Glen tank 13 are provided. When the weight detected by the weighing scale 41 is the lightest (when there is no grain), the working unit B is in the standard position closest to the right, and the weighing scale 41 is connected to the control device 37. When the detected weight of 41 is the heaviest (when the grains are fully loaded), the function of the slide control means C is to automatically control the working unit B to the leftmost moving position. When the grain is fully loaded in the Glen tank 13 at the moving position, the weight balance in the left-right direction is set so that loads substantially equal to the left and right crawler traveling devices 1, 1 are applied. .

When the mode changeover switch 39 is switched to "automatic", the above-mentioned slide control means C is operated, and the working section B is automatically slid horizontally in accordance with the amount of collected grains in the Glen tank 13. The actual slide movement is performed when both the stock switch 46 and the direction switch 47 are turned off.
F, that is, when there is no transported culm in the vertical transport device 7 and there is no cereal culm to be harvested (for example, in the latter half of turning on a headland, at the time of joining, and when traveling between fields) Time).

However, at this time, a clutch switch 45 to be described later, which detects that the threshing unit b is in a driving state, is turned off.
Is switched to ON, the slide control means C is activated, and the working unit B slides laterally to a position corresponding to the grain storage amount of the Glen tank 13 at that time. Then, when the clutch switch 45 is switched from ON to OFF, the slide control means C does not operate, and, for example, the working unit B automatically returns to the standard position (storage posture) closest to the right. . Further, since the slide movement does not occur during the work traveling, there is no extra maneuvering operation such as performing steering correction to make the vehicle run straight, even if a roll occurs due to the lateral movement inertia.

A stock switch 46 provided in the vertical conveying device 7 and a direction switch which is a sensor for automatic steering control which is provided at the base of the weeding tool 48 and which acts on the planted grain stalk to act thereon. 47 is a well-known one, and detailed description thereof is omitted.

When the mode is switched to "manual", the electromagnetic control valve 38 is operated by operating the left and right moving lever 40, and the working unit B can be arbitrarily moved laterally. As shown in FIG. 5, a stroke sensor 49 of a linear potentiometer type or the like for detecting the movement of the rear hydraulic cylinder 23 is provided so that the left and right positions of the working unit B with respect to the traveling unit A can be fed back. That is, the working unit B moves so as to follow the operation position of the left / right moving lever 40, and moves to the standard position when the left / right moving lever 40 is operated to the far right in FIG. It moves to the movement position.

By the way, the left and right moving lever 40 is of an on-off type in which the center is neutral and the working unit B moves to the left when tilted to the left and moves to the right when tilted to the right. By moving the relative movement mechanism 15 by tilting operation and then returning to the neutral position, the working unit B may be operated to an intended position.

For example, when the automatic control mode is selected, the working unit B is shifted to the right before the start of the mowing and threshing operation, but the narrow space with the overhanging projection is used. When passing, it is conceivable that the mode changeover switch 39 is set to "manual" so that the working unit B is moved to the left to allow the passage.

As shown in FIG. 8, a maximum extension detection switch 62 capable of detecting a state in which the hydraulic cylinder 23 is extended most by contact with an operating piece 64 attached to the cylinder cylinder 23a.
The shortest detection switch 63 capable of detecting the most contracted state is provided on the work frame 25, and when the work unit B is at the leftmost position with respect to the traveling unit A, that is,
When the engine 4 is stopped while the maximum extension detection switch 62 is ON and the minimum extension detection switch 63 is OFF, a warning signal such as an electronic sound indicating that the vehicle body is sliding or an alarm sound is issued. The warning device 68 is issued to inform the operator that the vehicle is in a sliding state (see FIG. 13). The state at the moving position and the shortest detection switch 63 which is the standard position is ON.
Further, if the state where the maximum extension detection switch 62 is turned off is displayed to the operator using a lamp or the like on the operation panel, it is convenient to check the moving state of the vehicle body.

For example, after the harvesting and threshing operation is completed, the Glen tank 13 is full and the work unit B is out of the field with the moving position at the leftmost position. . When moving again after a while after the stop, the working unit B is still at the moving position, but at that time, the driver misunderstands that it is the standard position and drives to contact with peripheral objects such as the left end of the fuselage touching a wall. For this reason, when the engine is stopped for parking and when the ignition switch 61 is turned on for re-running, the above-mentioned caution signal is output to alert the operator.

Also, even in the "automatic" mode, if the engine is stopped in the moving position, an alarm is issued.
It is also advantageous in that it is possible to recognize in advance that the working unit B suddenly slides to the standard position when the engine is restarted after the unloader 14 discharges the paddy in the moving position, and the alarm device 68 is provided with a monitor for confirming the lateral movement of the vehicle body. It becomes.

Further, this combine is provided with threshing detecting means 42 for detecting whether or not the threshing unit b is in a driving state, and when the automatic control mode is selected,
When the threshing unit b is driven, the slide control unit C is operable, and when the threshing unit b is not operating, the operation of the slide control unit C is disabled. The threshing control means D for linking the switch 39 and the threshing detection means 42 with the control device 37
It is prepared for.

That is, a threshing clutch means 44 for turning on and off a threshing clutch (not shown) and a clutch switch 45 which operates when the lever position is turned on constitute the threshing detecting means 42, and a mode changeover switch 39. Is switched to "automatic", the slide control means C is controlled so as to operate when the clutch switch 45 is "on" and not to operate when the clutch switch 45 is "off". It is.

In addition, a travel detecting means 43 for detecting whether or not the aircraft is traveling is provided, and when the manual operation mode is selected, the relative movement mechanism is provided only when the aircraft is not traveling. The control device 37 is provided with travel control means E for linking the mode changeover switch 39, the travel detection means 43, and the relative movement mechanism 5 so that the control unit 15 can operate.

That is, when the speedometer 46 as the travel detecting means 43 is connected to the control device 37 and the mode changeover switch 39 is switched to "manual", the speed detected by the speedometer 46 becomes zero (or When the speed is lower than or equal to an extremely low speed, a manual operation of laterally moving the working unit B using the left / right moving lever 40 is possible, but when the speed detected by the speedometer 46 is not zero (or when the speed is higher than the extremely low speed). Even if the left / right moving lever 40 is operated by locking the electromagnetic control valve 38 to the neutral position, the relative moving mechanism 15
Is controlled not to move.

[Alternative Embodiment] As shown in FIGS. 14 and 15, each of the rod-side base plates 65 of the rubber coupling F, which is the tip of the right and left rods of the hydraulic cylinder 23, has a U-shaped cross-section. A cover (an example of a cover member) 66 is pivotally supported at a fulcrum P. When the rod cover 66 is swung toward the rod at the fulcrum P, the rod cover 66 can be fitted between the rod-side base plate 65 and the rod-side cylinder cylinder end surface 22e so as to prevent the hydraulic cylinder 23 from shortening. And the fitting of the hydraulic cylinder 23
The right and left dimensions of the rod cover 66 are set so as to be possible only in the most extended state.

That is, the operating rod 67 is connected to the end of the rod cover 66 on the side of the cylinder, and when the rod is in the normal position shown in FIGS.
When the hydraulic cylinder 23 is in the fully extended state and the operating rod 67 is operated to push the rod cover 66 into place, the cover end 66a of the cylinder cylinder side is opened. Are fitted into the cylinder cylinder end face 22e in a state of being in close contact therewith, and are locked so that the hydraulic cylinder 23 cannot be shortened.

The rod cover 66 is connected to the right and left rods 23.
A, it is possible to prevent the relative movement between the traveling unit A and the working unit B at two positions of the standard position and the movement position. The lock mechanism R, which is a brake for stopping the lock so as not to move, is configured.

[Brief description of the drawings]

FIG. 1 is a side view of a combine.

FIG. 2 is a plan view of the combine.

3A is a rear view when the working unit is at a standard position closest to the right side. FIG. 3A is a rear view when a working unit is at a moving position closest to the left side.

FIG. 4 is a side view showing a frame of a traveling unit and a working unit.

FIG. 5 is a plan view showing a frame of a traveling unit and a working unit.

FIG. 6 is a plan view showing a frame of a traveling unit.

FIG. 7 is a plan view showing a frame of a working unit.

FIG. 8 is a cross-sectional view showing the structure of a slide hydraulic cylinder.

FIG. 9 is a side view of a main part showing a structure of a negative brake locking mechanism.

FIG. 10 is a front view of a main part showing a slide structure between a traveling unit and a working unit.

11 is a sectional side view showing an engagement means in the slide structure of FIG.

FIG. 12 is a front view showing an engagement means.

FIG. 13 is a control block diagram.

FIG. 14 is a plan view showing a cylinder cover and its mounting structure.

FIG. 15 is a side view showing the relationship between the cover and the cylinder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crawler traveling apparatus 2 Operating part 4 Engine 15 Relative moving mechanism 23 Hydraulic cylinder 23a Cylinder cylinder 23e Cylinder cylinder end face 23A Rod 25 Traveling frame 27 Work frame 66 Cover member a Cutting part b Threshing part c Kernel storage part A Traveling part B work Part R Lock mechanism

Claims (3)

[Claims] 1. A relative movement adjustment of a traveling unit including a crawler traveling device, an operation unit, an engine, and a working unit including a cutting unit, a threshing unit, and a grain storage unit in the left-right direction of the machine body. A relative movement mechanism comprising: a traveling frame that constitutes the traveling section; and a hydraulic cylinder that is installed over a work frame that constitutes the working section. A combine body moving device including a lock mechanism capable of mechanically preventing relative movement between a rod and a cylinder cylinder. 2. The negative brake according to claim 1, wherein said lock mechanism prevents relative movement between said rod and cylinder cylinder in a non-operating state, and permits relative movement between said rod and cylinder cylinder in an operating state. Item 2. The combine body moving device according to Item 1. 3. A relative movement adjustment of a traveling unit including a crawler traveling device, an operation unit, an engine, and a working unit including a cutting unit, a threshing unit, and a grain storage unit in a lateral direction of the machine body. A movable frame constituting the traveling section, and a hydraulic cylinder erected over a working frame constituting the working section to constitute the relative moving mechanism. Provide a cover member for the rod,
The cover member is configured to be fittable between the distal end portion of the rod and the cylinder cylinder end surface on the rod side so as to be able to prevent the hydraulic cylinder from shortening,
A combine vehicle body moving device, wherein the cover member is dimensioned so that the cover member can be fitted only in the most extended state of the hydraulic cylinder.