JPH081627Y2 - Combine handling depth control device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a combine depth control device for a combine, which is configured to drive and control the depth adjustment mechanism by an electric motor.

[Conventional technology]

In the handle depth control device of the combine, when the operating member of the handle depth adjustment mechanism is moved to the limit position set near the forward and reverse limits of the handle depth adjustment range, this is operated by the limit switch etc. Electrically detected,
In some cases, the electric power to the electric motor that drives the handling depth adjusting mechanism is automatically stopped. As a result, even if a very long culm or a very short culm exceeds the handling depth adjustment range, burnout of the electric motor at the limit of the handling depth adjustment is prevented.

[Problems to be solved by the device]

In the above-mentioned configuration, it is necessary to provide limit switches at each of the limit positions in the forward direction and the reverse direction of the handling depth adjustment range in order to prevent the electric motor from being burnt, which requires a large number of electric parts and wiring. It became expensive.

An object of the present invention is to reduce the cost by reducing the number of electric parts and wiring in the combine handling depth control device.

[Means for solving the problem]

A feature of the present invention resides in a combine handling depth control device configured to drive and control a handling depth adjusting mechanism by an electric motor as follows.

Equipped with a stopper made of an elastic material that regulates the movement limit of the handling depth adjustment mechanism in the forward and reverse directions, and the standard operation required for the handling depth adjustment mechanism to be driven over the entire range between both stoppers. The energization is controlled by limiting a set time longer than the time as the maximum continuous operation time of the electric motor in the same direction.

[Action]

According to the present invention, when an extremely long culm or an extremely short culm exceeding the handling depth adjustment range is introduced, the operating member of the handling depth adjusting mechanism is largely moved in the forward or reverse direction with it, Eventually, it will come into contact with the stopper to prevent movement. In this way, since the adjustment of the handling depth has not been completed even after the contact with the stopper, the electric motor continues to be operated in the shallow handling direction (for long culm) or the deep handling direction (for short culm). And
When the operating time of the electric motor in the same direction reaches the preset maximum continuous operating time (set time), the operation of the electric motor is automatically stopped.

In this case, when the operating member of the handling depth adjustment mechanism is moved from the state of being in contact with one stopper to the other stopper (corresponding to the entire range of handling depth adjustment) The maximum continuous operating time (set time) is set to be longer than the standard operating time.

Therefore, no matter where the operating member of the handling depth adjusting mechanism is located in the handling depth adjusting range, the electric motor continues to operate and the electric motor continues to operate after the operating member of the handling depth adjusting mechanism contacts the stopper. There is no such thing as saying that is not stopped. This eliminates the need for a limit switch that detects that the operating member of the handling depth adjusting mechanism has contacted the stopper and stops the electric motor, and wiring for this limit switch. Further, since the stopper is made of an elastic material, the impact when the operating member of the handling depth adjusting mechanism contacts the stopper is mitigated.

[Effect of device]

As described above, in the combine handling depth control device,
Since the limit switch for stopping the electric motor at the limit position of the handling depth adjustment range and the wiring for this limit switch are not required, the combine cost can be reduced. Since the stopper made of the elastic material reduces the impact when the operating member of the handling depth adjusting mechanism comes into contact with the stopper, the durability can be improved.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

The front of the combine is shown in FIG. As shown in FIG. 2, the traveling vehicle body (1) is equipped with a crawler traveling device (2), and the traveling vehicle body (1) is equipped with a threshing device (3), a control section (4) and an engine (not shown). ing. A cutting unit (5) is connected to the front part of the traveling vehicle body (1) so as to be able to drive and swing around a fulcrum (P), and a plurality of strip raising devices (6), cutting devices (7), and cutting are performed. A pre-conveyor device (8) and a rotary packer (9) for confluence of grain culms, and a feed chain (10) of the thresher (3) for merging grain culms that have been merged
It is provided with a post-conveying device (11) and the like for supplying up to.

The rear transfer device (11) is composed of a tip locking transfer mechanism (11a) and a stock holding device (11b), and is capable of swinging up and down about a fulcrum (P) of the mowing part (5). Thus, a handling depth adjusting mechanism (12) for adjusting the holding position of the grain culm by the feed chain (10) is configured. The handling depth adjusting mechanism (12) is automatically controlled by detecting the culm length of the grain culm conveyed by the rear conveying device (11).

FIG. 1 shows the structure of the handling depth adjusting mechanism (12) and its control device. As shown in FIG. 1, the reaper (5)
Is equipped with a pipe frame (13) which is the main frame of
A fulcrum (P) is set at the base end. A bracket (14) fixed to the pipe frame (13) and a fan gear (15)
The pinion gear (16), which is rotatably supported by the fan gear (15) and is meshed with the fan-shaped gear (15), is driven in the forward and reverse directions by an electric motor (18) with a reduction gear (17).

A linking rod (20) is installed over the arm (19) fixed to the sector gear (15) and the frame portion of the rear transfer device (11), and the arm (1) is rotated by the forward and reverse rotation of the electric motor (18).
9) is swung, and the rear transfer device (11) is swung up and down via the linking rod (20) to adjust the handling depth.

As shown in Fig. 3, on both sides of the pinion gear (16),
A pair of discs (21) that overlap each other on both sides of the sector gear (15) are attached, and the sector gear (1 is formed by punching a thin plate material.
It prevents the 5) from deforming in the surface direction and coming off the pinion gear (16). As shown in FIG. 1, the fan gear (1
The contact pieces (22) attached to both ends of the bracket (5)
By contacting the rubber stopper (23) mounted and fixed to 4), the rotation limit of the fan gear (15), that is, the handling depth adjustment range is limited.

As shown in FIG. 2, in order to support the rail base (26) of the stock carrier holding and transporting mechanism (11b) in the rear transporting device (11), it bypasses the transport path of the grain stem and the tip end locking and transporting mechanism ( 11
A pair of contact-type sensors (25) for detecting the position of the tips of the transported grain culms on the arch rod (24) extended from (a).
a) and (25b) are mounted, and the sensors (25a) and (25b) are connected to the control circuit of the electric motor (18).

Next, the operation of the handling depth control will be described. The grain culm is transported rearward by the rear transport device (11) and the arch rod (2
When passing through 4), the tip side acts on the sensors (25a) and (25b). In this case, if the handling depth is appropriate, the tip passes between both sensors (25a) and (25b), and only the lower sensor (25b) detects (ON) the grain culms and adjusts the handling depth. The mechanism (12) is in a neutral state.

When a long grain culm is conveyed in this state, both sensors (25a) and (25b) detect (ON) the grain culm, and based on this, the shallow handling direction, that is, the rear conveyance device (11) The electric motor (18) is energized to raise it, and the holding position of the stock holding device (11b) with respect to the grain stem moves upward. As a result, the tip of the grain culm is detected by both sensors (25
The rear conveyance device (11) continues to be lifted until it moves downward relative to a) and (25b) and is disengaged only from the upper sensor (25a), that is, until it reaches a neutral state.

On the contrary, when a short grain culm is conveyed in the neutral state, the tips of the culms are disengaged from both sensors (25a) and (25b).
a) and (25b) are not detected (OFF), and based on this, the electric motor (18) is energized so as to lower the rear conveyance device (11) in the deep handling direction, and the stock carrier holding and conveying mechanism is operated. The holding position for the grain culvert in (11b) moves downward.
As a result, the tip of the grain culm is detected by both sensors (25a), (25a).
Move upward relative to b) and lower sensor (2
5b) only is detected (ON), that is, the lowering operation of the rear conveyance device (11) is continued until the neutral state is reached. By the above operation, the tip position of the grain culm is maintained in the range between both sensors (25a) and (25b) regardless of the change in the culm length of the grain culm.

In the above handling depth control, if a very long culm or an extremely short culm is conveyed that exceeds the handling depth adjustment range, even if the rear transport device (11) is raised or lowered to the limit position, the sensor ( There is no change in the feedback signals from 25a) and (25b), and the electric motor (18) continues to operate in the forward rotation direction or the reverse rotation direction.

In this case, in order to prevent the electric motor (18) from burning out, the present invention uses a set time (to) longer than the standard operating time required to move the entire handling depth adjustment range.
[For example, 15 seconds] is limited as the maximum continuous operation time in which the electric motor (18) can be continuously energized in the same direction.

FIG. 4 shows a flowchart of the above handling depth control. When intermittently controlling the operation of the electric motor (18) at a constant cycle, the set time (to) can be measured by counting the drive pulses of the electric motor (18).

In the claims of the utility model registration, reference numerals are given for convenience of comparison with the drawings, but the invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

1 is a side view of a handle depth adjusting mechanism, FIG. 2 is a side view of a front portion of the combine, and FIG. 3 is a handle depth. FIG. 4 is a sectional view of the vicinity of a pinion gear in the depth adjusting mechanism, and FIG. (12) …… Handling depth adjustment mechanism, (18) …… Electric motor,
(23) …… Stopper, (to) …… Set time.

Claims (1)

[Scope of utility model registration request] 1. A depth control mechanism (12) for an electric motor (18)
In a combine handling depth control device configured to be driven and controlled by an elastic material, a stopper (23) made of an elastic material is provided to restrict the movement limit of the handling depth adjusting mechanism (12) in the forward and reverse directions. Together with the handling depth adjustment mechanism (12)
Is set as a maximum continuous operation time of the electric motor (18) in the same direction by limiting a set time (to) longer than the standard operation time required to drive the entire range between the stoppers (23). A combine handling depth control device configured to control energization.