JPH0110991Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention consists of a main grain culm combing device that prepares the grain culm in a reaping position (upright position), and an auxiliary device that combs the lodging grain culm and transfers it to the main grain culm combing device. In a combine harvester or other grain harvesting machine having a grain culm combing device,
The present invention relates to a transmission device that can intermittent power to an auxiliary grain culm combing device as needed, and can also ensure safety in the event of an overload.

Conventionally, combine harvesters and other grain culm harvesting machines are equipped with a grain culm combing device to adjust the grain culm to the harvesting position. In order to make it possible to smoothly harvest grain culms by combing them, the grain culm combing device that adjusts the reaping posture of the grain culm is used as a main grain culm combing device, and this It is equipped with an auxiliary grain culm combing device for combing the culms.

By the way, in the case where an auxiliary grain culm combing device is attached to the main grain culm combing device, the auxiliary grain culm combing device operates by receiving power from the main grain culm combing device. However, if the grain culm to be reaped is not so lodging, the auxiliary grain culm combing device is not necessary, and if it is in operation, it will cause a reverse effect of the grain culm combing claw. This often causes inconveniences such as the grain culm being adjusted to the reaping position being pushed down, or the grain culm wrapping around the grain culm lifting claws, resulting in an overload condition.

The present invention was devised in view of the above-mentioned actual situation, and in particular, the auxiliary grain culm combing device is installed on the transmission shaft between the drive section of the main grain culm combing device and the drive section of the auxiliary grain culm combing device. A clutch is provided to intermittent power to the raising device,
A safety pin that breaks due to overload is removably attached to either the driver or the passive body in parallel with the transmission shaft, and an engagement hole for the safety pin is provided in the other to secure the clutch pawl. Due to this structure, unless the grain culm to be harvested is significantly lodging, power to the auxiliary grain culm combing device is cut off, and the lodging or wrapping of the grain culm due to the reverse effect is prevented. In addition, even if the auxiliary grain combing device falls into an overload state due to wrapping of grain culm, etc., the structure of the grain culm harvester is such that the power can be immediately cut off to ensure safety. The aim is to provide a simple transmission device.

To explain the configuration of the present invention with reference to an embodiment shown in the drawings, A is a combine harvester, and a main grain culm combing device 1 and an auxiliary grain culm combing device 2 are installed at the front of the machine. A pre-processing section 3 is provided. 4 is a threshing unit mounted behind the pre-processing unit 3;
Reference numeral 5 denotes a threshing culm processing section that cuts and discharges the threshed culm, and the grain culm harvested in the processing section 3 is transferred to the threshing section 4.
The grain is now being transported to and threshed.

The main grain culm combing device 1 is made up of a chain 7 suspended over the upper and lower ends of a case 6, and a large number of grain culm combing claws 8 attached thereto, and the auxiliary grain culm combing device 2 is also similar. The chain 9 is equipped with a large number of grain culm raising claws 10, and the grain culm raising claws 8,
The protrusion directions of 10 are different by 90 degrees. Reference numeral 11 denotes a drive sprocket of the main grain culm combing device 1, and a drive shaft 12 on which the drive sprocket 11 is mounted is transmitted to a driving shaft 13 from a power source side by a gear mechanism. Further, 14 is a drive sprocket of the auxiliary grain culm combing device 2, and the drive sprocket 14 is rotatably supported on a transmission shaft 15 which is transmitted to the drive shaft 12 via a gear mechanism. Transmission is provided between the drive sprocket 14 and the transmission shaft 15 by a clutch 16 in an intermittent manner. The clutch 16 includes a clutch drive body 17 spline-coupled to the transmission shaft 15 and a clutch passive body 18 that is integral with the drive sprocket 14, and the clutch passive body 18 has a safety pin 19 screwed therein which can break due to overload. The clutch drive body 17 is provided with a plurality of engagement holes 2 into which the protruding ends of the safety pins 19 are fitted, which are detachably mounted in parallel with the transmission shaft 15 by a stopper.
0 constitutes a clutch pawl. 21 is a clutch lever, 22 is a shifter, and the clutch driving body 17 is the clutch lever 2.
It is configured such that it can be slid in the axial direction of the transmission shaft 15 and engaged with or disengaged from the clutch passive body 18 via the safety pin 19 in one operation.
Note that the safety pin 19 is attached to the clutch drive body 17 side, and its engagement hole 20 is attached to the clutch passive body 18 side.
may be provided.

Next, the operation of the present invention constructed as described above will be explained. Now, when the clutch lever 21 is operated to the "on" side, the clutch driving body 17 approaches the clutch passive body 18, the protruding end of the safety pin 19 fits into the engagement hole 20, and the clutch 16 enters and engages the transmission shaft. 15
Since the rotational force is transmitted from to the drive sprocket 14, the auxiliary grain culm combing device 2 is put into operation.
Conversely, when the clutch lever 21 is operated in the "off" direction, the clutch driving body 17 separates from the clutch passive body 18, so the clutch 16 is disengaged, cutting off the power to the driving sprocket 14, and causing the auxiliary culm combing device 2 to operate. Operation stops. Therefore, if the grain culm is significantly lying down during the grain culm harvesting operation, by turning the clutch 16 on, the auxiliary grain culm combing device 2 will comb the grain culm, and the main grain culm will be combed. Since the grain is delivered to the culm combing device 1, even if the grain culm is lodging, it can be harvested smoothly. In addition, if the grain culm is upright or not very lodging, the clutch 1
6 to "off" to put the auxiliary grain culm combing device 2 into a non-operating state, the grain culm will be pushed down or the grain will be It is possible to prevent the culm from wrapping around the grain culm combing claw 10.

In the event that the auxiliary grain culm combing device 2 is overloaded during operation, the safety pin 19 will break immediately and the clutch 16 will be disengaged, so that the auxiliary grain culm combing device 2 can be operated without the need for a separate safety device. Raising device 2
It is possible to cut off power to the machine, prevent damage, etc., and ensure safety. Moreover, safety pin 1
9 is mounted parallel to the transmission shaft 15, and its protruding end is fitted into the engagement hole 20, so that straw debris and the like will not be caught on the safety pin 19 and wound around the transmission shaft 15.

In short, the present invention has a main grain culm combing device that prepares the grain culms in a reaping position, and an auxiliary grain culm combing device that combs the lodging grain culms and transfers them to the main grain culm combing device. and a clutch is provided on the transmission shaft between the drive section of the main grain culm combing device and the drive section of the auxiliary grain culm combing device for intermittent power to the auxiliary grain culm combing device,
A safety pin that breaks due to overload is removably attached to either the driver or passive body of the clutch in parallel with the transmission shaft, and an engagement hole for the safety pin is provided on the other side to accommodate the clutch pawl. Because of this structure, unless the harvested grain culm is significantly lodging, the power to the auxiliary grain culm combing device is cut off, and the grain culm is prevented from lodging or wrapping due to the adverse effect. It is not possible to perform the culm harvesting operation smoothly, and even if the auxiliary grain culm combing device is overloaded due to grain culm wrapping, the safety pin will break immediately. Power can be cut off to ensure safety. Moreover, since the clutch pawl is made up of a safety pin, there is no need to provide a separate safety device, which simplifies the structure. Furthermore, since the safety pin is installed parallel to the transmission shaft, debris such as straw can be caught in the safety pin. This has an extremely useful practical effect in that it does not get caught and wrapped around the transmission shaft.

[Brief explanation of the drawing]

The drawings show an embodiment of the transmission device in the grain culm harvester according to the present invention, in which FIG. 1 is an overall side view of the combine, FIG. 2 is a sectional view of the transmission device, and FIG. 3 is the same as above. It is an enlarged cross-sectional view of a part thereof. In the figure, 1 is the main grain culm combing device, 2 is the auxiliary grain culm combing device, 7 and 9 are chains, 8 and 10 are the grain culm combing claws, and 11 is the main grain culm combing device 1 14 is a drive sprocket for the auxiliary culm combing device 2, 15 is a transmission shaft, 16 is a clutch, 17 is a clutch drive body, 18 is a clutch passive body, 19 is a safety pin, and 20 is its engagement hole. , 21 is a clutch lever.

Claims (1)

[Scope of utility model registration request] a main grain culm combing device that prepares the grain culm in a reaping position;
It has an auxiliary grain culm combing device which combs down the fallen grain culm and delivers it to the main grain culm combing device; A clutch is installed on the transmission shaft between the sections to intermittent power to the auxiliary culm combing device, and the clutch is equipped with a safety pin that will break due to overload on either the drive or passive body of the transmission shaft. It is attached removably in parallel with the
A transmission device for a grain culm harvester, characterized in that a clutch pawl is formed by providing an engagement hole for a safety pin on the other side.