JPH0810246Y2 - Operation mechanism in work machine connection structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an operating mechanism in a work machine connecting structure.

<Prior Art> Conventionally, in the working machine as described above, there is a mechanism of easily separating and attaching the working machine and the traveling machine body for convenience of storage, transportation, maintenance, etc., for example, Japanese Utility Model Publication No. Sho 59-141713. Known by.

<Problems to be solved by the invention> However, in the conventional working machine coupling mechanism as described above, a set for setting the coupling between the link holder at the end of the lifting link and the hitch holder at the working machine end when the working machine is engaged and disengaged. The workability was poor because it was difficult to insert the pins and position the insertion holes, and it took a considerable time for two people to attach and detach the work machine.

On the other hand, in order to easily perform the attachment / detachment operation of the working machine, even if the attachment / detachment mechanism is provided at the end of the elevating link, the attachment / detachment operation must be performed at the connection part, and even if one person can work, the attachment and detachment work is It had the drawback of being expensive.

<Means for Solving the Problems> The present invention for solving the above problems is based on the present device 1
Side link holder 25 provided at the end of the lifting link 7 and the working machine
The hitch 61 provided on the 11 side is detachably connected to the working machine 11
In the mechanism for connecting to the machine 1 side, an upper locking receiver 63 and a lower locking receiver 57 are laterally provided on the upper and lower parts of the hitch 61, respectively, and the upper part of the link holder 25 is scooped up from the lower side. An upper locking portion 35 that engages with the upper locking receiving body 63 is provided, and an engaging body that locks the lower locking receiving body 57 in a connected state below the upper locking portion 35 to fix the working machine. An operating member 43 that rotatably supports 39 and a stopper 44 is provided on the way to the rear end to engage and disengage the engaging body 39 is connected to the engaging body 39, and the operating member 43 is on one side of the lifting link 7. To the driver's seat, the operation member 43 is slidably supported on the elevating link 7 side so as to be movable in the axial direction. A holding member 45 for engaging the stopper 44 and locking the engaging body 39 in the engaged state is provided.

<Operation> When the link holder 25 is positioned below the hitch 61 of the working machine 11 and the elevating link 7 of the machine 1 is raised, the upper locking portion 35 of the link holder 25 causes the upper locking receiver 63 of the hitch 61 to move. Fit and engage from below to scoop up the hitch 61. When the elevating link 7 is further raised, the lower lock receiving body 57 moves to the link holder 25.
Close to. The lower locking receiver 57 is locked by rotating the engaging body 39 provided on the link holder 25, and the working machine 11 is fixed. The operation member 43 is connected to the engagement body 39, and the operation member 43
The engagement / disengagement of the engagement body 39 is operated by moving. Since the operation member 43 is inclined in substantially the same direction as the lifting link 7,
The mechanism is compact and does not interfere with the installation of other devices. In addition, since it is oriented toward the driver's seat, the operation from the driver's seat becomes easy.

<Embodiment> An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is an overall side view showing a lifting link and a working machine of a riding rice transplanter equipped with a working machine with a plant at the rear, and shows a state in which the working machine is removed. This machine 1 is a riding rice transplanter main body, and upper links 3 parallel to each other are provided at the rear end.
An elevating link 7 including a lower link 5 and a lower link 5 is provided so as to be vertically swingable. At the rear end of the elevating link 7, a main body side connecting portion 9 for detachably attaching the working machine 11 is arranged.

The working machine 11 includes a drive case 14 that receives power from the machine 1 through a drive shaft 13, and a transmission case that extends rearward from the drive case 14 and has a planting rod 16 at a rear end.
15, a seedling stand 17 that is placed above the drive case 14 while being inclined, and a float 18 that is arranged below each transmission case 15. Stand members 19 are attached to the left and right ends of the working machine 11 so as to extend from the rear to the lower side of the float 18 and extend forward. Since the stand member 19 is U-shaped with the front opening, the working machine 11 supported by the stand member 19 can be tilted forward within a certain range by the elasticity of the stand member 19.

A rolling shaft 21 is provided at a center position on the front side of the working machine 11, and a working machine-side connecting portion 23 to which the main machine-side connecting portion 9 described above is connected is provided above the rolling shaft 21.

The structures of the machine side connecting portion 9 and the working machine side connecting portion 23 will be described in detail below. First, the main body side connecting portion 9 will be described with reference to FIGS. 2, 3, and 4, and it is composed of two plates between each end of the upper link 3 and the lower link 5. The link holder 25 is attached in the vertical direction. The upper part of the link holder 25 is connected to the upper link 3 at an upper link connection fulcrum 27, and the lower end is connected at a lower link fulcrum 29 via a link member 31. The link member 31 extends from the lower link connection fulcrum 29 toward the main unit 1 and is connected to the link holder 25. Link holder
A rod-shaped contact member 33 is inserted in the left-right direction at the lower end of 25,
By connecting the link member 31 to both ends, the contact member
33 connects the link holder 25 and the link member 31. At the upper end of the link holder 25, an upper locking portion 35 is provided by a groove formed in the left and right direction. The opening side of the upper locking portion 35 is largely opened back and forth, and guides an upper locking receiver 63 on the side of the working machine side coupling portion 23, which will be described later, to the bottom of the upper locking portion 35.

Engaging members 39 are arranged above the contact members 33 along the left and right side surfaces of the link holder 25. The engagement body 39 is composed of a U-shaped plate member having an opening at the bottom, and the machine-side ends are fixed to both ends of a support shaft 41 that inserts the link holder 25 into the left and right. The support shaft 41 is rotatably supported with respect to the link holder 25, and the pair of left and right engaging bodies 39 simultaneously rotate with respect to the link holder 25. Springs 42 are stretched between the left and right engaging bodies 39 between the left and right engaging bodies 39 and the link holders 25, and are constantly urged downward. Further, a recess 37 is formed on the work machine 11 side of the hook mounting portion, and the engaging body 39 and the recess 37 form a housing portion for housing a work machine side lower engagement receiving body 57 described later.

Next, the engagement / disengagement operation mechanism 40 of the main body side connecting portion 9 will be described.

The operating member is attached to the spring 42 mounting portion of the right engaging body 39.
43 is rotatably connected. The operating member 43 is inserted through the holding member 45 fixed to the right side surface of the upper link 3, extends toward the driver's seat along the upper link 3, and has a lever bent outward at the tip. It has a portion 43a. The operating member 43 extends to a position where the operator in the driver's seat can directly operate it with the lifting link 7 raised. In this way, since the operating member 43 and the holding member 45 are located on one side of the upper link 3 and the operating member 43 is provided along the upper link 3, it is possible to supply mat seedlings to the seedling stand 17 or the like. There are few troubles such as being caught during work, and it does not interfere with the installation of other devices.
Further, since the operating member 43 is attached to the driver's seat in an oriented manner, there is an advantage that the operating member 43 can be easily pulled and pushed out from the driver's seat, and because it is attached along the upper link 3, Engagement operation mechanism
Even if an excessive operation load is applied to 40, the members are less likely to be deformed or damaged.

In addition, the threaded portion 43b is formed in the holding member 45 penetrating portion of the operation member 43.
Is provided, and a hole 46 is formed on the holding member 45 side.
A stopper 44 made of a nut is screwed into the screw portion 43b, and a pin 47 is inserted into the working portion 11 side of the screw portion 43b and protrudes to the left and right. The hole 46 has a small hole portion 46a at the lower portion, which has substantially the same size as the thickness of the operation member 43, and the stopper 44.
And a large hole 46b through which the pin 47 can pass. A biasing spring is provided between the ceiling portion of the operating member 43 and the operating member 43.
49 is interposed and biases the operation member 43 downward.

When the operating member 43 is pulled in the direction of the machine 1, the engaging body 39 rotates upwards simultaneously against the urging force of the spring 42, and the engaging body 39 opens toward the working machine 11. That is, the operation member 43 is lifted against the biasing spring 49,
If the operating member 43 is lowered when the pin 47 reaches the outside of the holding member 45 by inserting the inside of the large hole portion 46b and pulling toward the main body 1, the operating member 43 is caught by the pin 47 in the small hole portion 46a. Is restricted, and the engagement body 39 is fixed in the open state.

On the lower end working machine 11 side of the link holder 25, a guide portion 51 that is widened to the left and right toward the working machine 11 is formed. Information department
51 is in contact with left and right side surfaces of a hitch bracket 55, which will be described later, in a state in which the working machine is connected.

Next, the structure of the working-machine-side connecting portion 23 will be described with reference to FIGS. 5, 6, and 7. A box-shaped hitch bracket 55 is provided above the rolling shaft 21. The hitch bracket 55 has a step portion on the machine 1 side, and has a contact receiving surface 55a for contact with the contact member 33 described above. The contact receiving surface 55a is formed along the peripheral surface shape of the contact member 33, and has an arc shape in the structure of the present embodiment.

On the upper part of the hitch bracket 55, a lower engagement receiving member 57 formed of a pin-shaped member is inserted in the left-right direction, and hitch members 59 forming hitches 61 are fixed to both ends upward. Reinforcement flange 59a on the working machine 11 side of the hitch member 59
Are formed inside each. The upper end of each hitch member 59 has a step portion that is bent inward, and the tip of the hitch member 59 has an upper locking receiver.
63 is inserted and constitutes the hitch 61 as a whole. The upper locking receiver 63 in the structure of this embodiment is made of a pin-shaped member. A U-shaped bent spring hook 65 is fixed below the upper lock receiver 63 and extends upward. A rolling spring 66 is stretched between the spring hook 65 and each part of the seedling stand 17. It is set up. The working machine-side connecting portion 23 described above is located closer to the machine 1 than the center of gravity of the entire working machine 11 is.

The imaginary line in FIG. 2, the imaginary line in FIG. 6 and the imaginary line in FIG. 7 show a state in which the connecting portion 9 on the machine side and the connecting portion 23 on the working machine side are connected. The operation of the connecting structure will be described below. With the lifting link 7 lowered, the upper locking portion 35 of the link holder 25 is positioned below the upper locking receiver 63 on the working machine 11 side. The engagement body 39 of the main body side connection portion 9 is restricted to the open state by the pin 47 of the operation member 43 and the small hole portion 46a of the holding member 45. When the up-and-down link 7 is raised, it is guided by the opening extending in the front and rear of the upper locking portion 35, and the upper locking portion is pressed from below.
35 engages with the upper lock receiver 63. When the up-and-down link 7 is further raised, the working machine 11 is scooped up in the air, and the working machine 11
Due to the movement of the center of gravity of, the lower part of the work machine 11 swings toward the machine 1. As a result, the hitch bracket 55 of the working machine side coupling portion 23 is guided by the guide portion 51 of the link holder 25 to determine the left and right position and enters between the left and right guide portions 51. This time,
The lower engagement receiving body 57 of the working machine side connecting portion 23 enters the recess 37 of the machine side connecting portion 9, and the contact receiving surface 55a from the rear side to the contact member 3
Get in touch with 3. When the regulation of the engagement body 39 by the operation member 43 is released here, the engagement body 39 is rotated by the spring 42, reaches between the hitch bracket 55 and the hitch 61, and contacts the lower engagement receiving body 57 from the working machine 11 side. Hit The stopper 44 hits the inside of the holding member 45 and is engaged by vibration or overload.
This prevents the inversion of 39, whereby the engagement body 39 is locked in the engaged state. If there is looseness between the engaging body 39 and the lower lock receiving body 57, the stopper 44 can be rotated to rotate the engaging body 39 through the operating member 43, and the lower lock receiving body 57 is recessed. The lower locking receiver 57 is pressed into the link holder 25 by pulling it in. Therefore, since the backlash of the engaging portion between the lower lock receiving body 57 and the engagement body 39 can be adjusted by the stopper 44 each time, there is no problem that the backlash is generated in the connecting portion due to a processing and assembling error or long-term use. Further, since the lower locking receiving body 57 is pressed by the two left and right engaging bodies 39, the lower locking receiving body 57 is securely fixed and the connection strength is high.

In the connected state, since the engaging body 39 is provided along the side surface of the link holder 25, the engaging body 39 is supported by the side surface of the link holder 25 to increase the strength of the engaging body 39 against a lateral load. Further, since the engagement body 39 is inserted into the gap between the hitch bracket 55 and the hitch 61 to lock the lower lock receiving body 57, the inter-member space of the working machine side connecting portion 23 can be effectively used. .

Further, the hitch member 59 covers the engaging portion, which prevents contamination by dirt and the like, and in the structure of this embodiment, the reinforcing bracket 59a also covers the engaging portion 39 in the connected state. The protection of is getting thicker.

Further, the attachment position of the contact member 33 should be set to the lower link connection fulcrum 29.
Since it is displaced to the side of this machine 1 more than the hitch bracket
The thickness of 55 in the front-rear direction can be increased by the amount of the displacement, and the strength of the hitch bracket 55 can be enhanced. The lower connecting portion is not only in surface contact with the hitch bracket 55,
The hitch bracket 55 is fitted between the lower links 5, the lower connection state is stable, and the lower link 5 serves as a guard, and the durability of the connection portion against external impacts and loads is improved. Further, since the contact member 33 is located on the machine 1 side with respect to the ascending / descending trajectory of the upper locking portion 35, the contact member 33 is connected at the time of connection.
Without touching the work implement 11 side, the upper lock 35
Can be engaged with the upper locking receiver 63, and the attachment / detachment operation can be facilitated.

After the connection between the main body side connecting portion 9 and the working machine side connecting portion 23 is completed, the connecting portion 69 provided at the tip of the drive shaft 13 is connected to the output portion 67 provided at the rear end of the main body 1. The drive shaft 13 is inserted into the lifting link 7 on the side where the operation member 43 is provided. As described above, since all the joints to be operated when attaching and detaching the work machine are provided on one side of the machine body, the attachment and detachment operation can be performed on one side of the work machine 11, and the work efficiency can be increased.

When removing the working machine 11 connected as described above, the stand member 19 of the working machine 11 is set to the stand position, the operating member 43 is pulled in the raised position to release the engaging body 39, and the lifting link 7 is lowered. Let Stand member 19
When the lifting link 7 is further lowered from the position where the
The abutment member 33 is separated from the abutment receiving surface 55a, and the lower engagement receiver 5
7 separates from the recess 37, and finally the upper locking portion 35 separates from the upper locking receiver 63. Therefore, when the working machine 11 is to be removed, it can be easily removed only by the operation in the driver's seat. Further, since the stand member 19 has elasticity, it can be tilted forward in the stand state.
Below the 63, there are few obstacles to the ascending track of the upper locking portion 35, and the mounting can be facilitated. Work machine
Even when removing 11, the work machine 11 can be attached and detached by one person, because the work machine 11 can be detached elastically and automatically while tilting forward as the elevating link 7 descends.

The structure of the present invention described above can be applied not only to rice transplanters, but also to many other working machines such as seeders, fertilizer applicators, weeders, and disinfectants.

<Effects of the Invention> According to the mechanism of the present invention configured as described above, when the work implement is easily and quickly attached / detached by the lifting / lowering operation of the lifting / lowering link, the operating member for engaging / disengaging the engaging body is directed toward the driver's seat. Therefore, the engaging / disengaging operation of the engagement body can be operated from the driver's seat, and the operation of attaching / detaching the work machine can be performed by one person and can be performed more simply and quickly.

In addition, the operating member is provided close to the lifting link,
Moreover, since it is inclined in substantially the same direction as the elevating link, there is an advantage that it does not hinder the attachment and operation of other devices.

Further, since the engagement body is locked by the stopper on the operation member side and the holding member on the elevating link side when the working machine is engaged and coupled, it does not come off due to vibration or overload during work or traveling.

[Brief description of drawings]

Fig. 1 is an overall side view showing a lifting link and a working machine of a riding rice transplanter equipped with a planting work machine at the rear, Fig. 2 is a side view of the machine side connecting part, and Fig. 3 is a plan view of the same. FIG. 4 is a rear view of the same, FIG. 5 is a partial front view of the seedling table showing the mounting position of the working machine side connecting portion, FIG. 6 is a side view of the working machine side connecting portion, and FIG. It is a front view in the state where the part and the work machine side connecting part were connected. 1: This machine, 7: Lifting link 11: Working machine, 25: Link holder 35: Upper locking part, 39: Engaging body 43: Operating member, 57: Lower locking receiving body 61: Hitch, 63: Upper locking Recipient

Claims (1)

[Scope of utility model registration request] 1. A link holder (25) provided at the end of a lifting link (7) on the machine (1) side and a hitch (61) provided on the working machine (11) side are detachably connected. In the mechanism for connecting the working machine (11) to the machine (1) side, an upper lock receiving body (63) and a lower lock receiving body (57) are provided sideways on the upper and lower portions of the hitch (61), The upper part of the link holder (25) is provided with an upper locking part (35) that is scooped up from below to engage with the upper locking receiver (63), and is connected below the upper locking part (35). In this state, the lower lock receiving body (57) is locked to rotatably support the engaging body (39) for fixing the working machine, and the stopper (44) is provided on the way to the rear end. ) Is engaged with and disengaged from the operating member (43), and the operating member (43) is connected to the engaging member (39).
3) is moved to one side of the elevating link (7) and tilted in substantially the same direction as the elevating link (7) so that it is directed toward the driver's seat, and the operating member (43) is provided on the elevating link (7) side. ) Is inserted in an inclined state and supported so as to be movable in the axial direction,
An operating mechanism in a work machine connecting structure, comprising a holding member (45) for engaging the stopper (44) and locking the engaging body (39) in an engaged state.