JPS6021088B2 - Belt cover attachment/detachment device for mobile vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a belt cover attachment/detachment device for a mobile vehicle, such as a walking-type mobile agricultural machine, in which a belt cover is detachably attached to a machine equipped with a speed change operation device.

Generally, in mobile vehicles such as walk-behind mobile agricultural machines, when replacing transmission members such as belts and pulleys, or during maintenance and inspection work, the engine is started and the main clutch is engaged to replace or repair the belt. , a work style is being explored to inspect the operating condition of the pulley 1st class transmission section, so if the gear shift operating device remains in the gear shifting operating position when the belt cover is removed, there is a risk that the aircraft will suddenly start moving. .

Further, at the end of such transmission member replacement work or maintenance/inspection work, it is often the case that the machine body is moved without attaching the belt cover, which is very dangerous. In view of the above-mentioned circumstances, the present invention has been developed to replace work, maintenance, and inspection of transmission members such as belts and pulleys.
It is an object of the present invention to enable safe and reliable operation by mutually checking the attachment/detachment of a belt cover and the speed change operation of a speed change operation device. The characteristic configuration of the present invention to achieve the above object is that a transmission belt is stretched across the engine and transmission mounted on the machine, and a belt cover that covers the belt is detachable from the machine. In a mobile vehicle equipped with a vehicle, a gear shift operating device is attached to the gear shift device for driving and shifting by operating a gear shift operating shaft in and out of the gear shift device, and a gear shift operating device is attached to a fixed part on the machine side in a portion covered by the belt cover. A restraining device is provided with one end fixed and the other end penetrating the belt cover and protruding to the outside of the belt cover. The restraining state of the belt cover is configured to be freely switchable between a restraining state in which it protrudes into the operating range of the gear shift operating device and prevents the gear shifting operation, and a restraining release state in which it moves out of the operating range and allows the gear shifting operation. The insertion point includes a flexible part that allows the restraining tool to change its posture, and an engaging part that engages the restraining tool and prevents the belt cover from being removed when the restraining odor is in a released state. , a check groove formed in a series with a cutout part for allowing the belt cover to be removed without coming into contact with the check tool when the check odor is in the check state is provided, and from this configuration, the following can be achieved. It has an effect.

In other words, when replacing, maintaining, or inspecting transmission members such as belts and pulleys, the belt cover cannot be removed unless the operating device is operated in the neutral position, so it is necessary to start the engine and engage the main clutch. Even when inspecting the operational status of replaced or repaired transmission members such as belts and pulleys, the aircraft will not suddenly start moving as mentioned above, and the final inspection under such driving conditions will be easy. can be done safely.

Further, since the speed change operation of the speed change operation device cannot be performed unless the belt cover is attached, it is possible to reliably avoid dangerous movement of the aircraft with the belt cover forgotten to be attached as described above. Therefore, we are unable to replace, maintain, or inspect transmission members such as belts and pulleys.
By mutually controlling the attachment and detachment of the belt cover and the speed change operation of the speed change operation device, this can be done safely and reliably. Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a machine 6, which is equipped with a transmission 5 having running wheels 3 and a control handle 4 at the rear end of a frame 2 on which an engine 1 is mounted. A belt cover 8 covering the outer periphery and outer side of the transmission belt 7, which is stretched between the pulley IA and the passive pulley 5A on the transmission 5 side, is secured by a plurality of bolts 9...
The figure shows a walking type mobile agricultural machine which is detachably attached to the machine via the transmission device 5. Between the speed change operating device 10 provided on the speed change device 5 side and the belt cover 8, as shown in FIG. 2 and FIG. A restraining device 11 is provided that makes it impossible to remove the belt cover 8 if the speed change operation device 10 is not operated in a neutral position, and makes it impossible to perform a speed change operation of the speed change operation device 10 unless the belt cover 8 is attached. .

The speed change operation device 10 has fork shafts 10A, 10 as speed change operation shafts extending between the through hole formed in the side wall of the case of the speed change device 5 and the bottomed cylindrical support portions 5a, 5a, respectively.
A is slidably inserted and supported, and the rod portions of both fork shafts 10A, 10A that protrude from the case side wall into the belt cover 8 have vertical and vertical shafts that extend rearward along the operating handle 4. Gear change hooks 10C, 10C are provided which can be iron-engaged with the operation piece 10b of the speed change operation lever 10B, which can be freely swung in the left and right directions. It is configured to selectively switch to three forward speeds and one reverse speed by sliding the fork shaft 10A or 10A from the neutral position to the shift operation position by performing a swinging operation in the lateral direction.

Further, the support portions 5a, 5a of the case side walls are integrally molded with the case body by die casting.

The deterrent odor 11 is configured as follows.

That is, only when the fork shafts 10A, 10A of the speed change operating device 10 are in the neutral position, the lower ends of the speed change pieces 10C, 10C are iron-engaged with the side wall corresponding to the belt cover 8 of the speed change device 5. A restraining member 11B having a fitting groove 11A capable of preventing movement of the fork shafts 10A, 10A from the neutral position to the shift operation position is pivotally mounted to be able to freely swing up and down, and this restraint member 11B performs the shift operation. device 10
The posture can be freely switched between a restraining state in which the gear shift operation is prevented, and a restraining release state in which the competition groove 11A moves downwardly from the movement range of the shift pieces 10C and 10C, allowing the gear shift operation to be carried out by the gear shift operating device 1. It has been done. In addition, this check member 1
A coil spring 11C is interposed in the pivot portion of the restraining member 11B for urging the restraining member 11B to move to the restraining position, and a wing nut 11D is screwed into the flange portion 8A of the belt cover 8. A restraining groove 11E that can be engaged with the screw portion 11b inserted into the groove 11b.
is provided. As shown in FIG. 4, when the check member 11B is switched between the check state and the check release state, the check groove 11E is formed so that when the check member 11B is inserted into the screw portion 11b, the check groove 11E moves up and down as the posture is changed. When the fork shaft 10A of the speed change operating device 10 is not operated to the neutral position and is in the check release state, the check part village 118 is in the check release position. an engaging portion b that prevents the belt cover 8 from coming off;
When the check member 11B is in the check state, the screw portion 11b of the check member 11B escapes from inside the check groove 11E, that is, the cutout portion c is used to remove the belt cover 8 without coming into contact with the screw portion 11b. are formed by a series of grooves.

[Brief explanation of the drawing]

The drawings show the implementation side of the belt cover attachment/detachment device for a mobile vehicle according to the present invention, FIG. 1 is an overall side view of the walking-type mobile agricultural machine, FIG. 2 is an enlarged longitudinal sectional side view of the main part, and FIG. 3 is an external view of the part. Fig. 4 is an enlarged partially cutaway rear view of the belt cover. 5...Transmission device, 6...This machine, 7...
...Transmission belt, 8... Belt cover, 10... Speed change operating device, 10A... Speed change operation shaft, 11...
・・Restraint device, lIE・・・・Restraint groove. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1 The transmission belt 7 is stretched across the engine 1 and the transmission 5 mounted on the machine 6, and the belt 7 is
A mobile vehicle is equipped with a belt cover 8 that is detachably attached to the main unit 6, and is equipped with a gear shift operating device 10 that moves gear shift operating shafts 10A, 10A into and out of the gear shift device 5 for traveling and shifting gears. At the same time, a restraining tool 11 has one end fixed to a fixed part on the machine 6 side in the area covered by the belt cover 8, and the other end penetrates the belt cover 8 and projects to the outside of the belt cover 8. a restraining state in which the restraining tool 11 projects into the operating range of the shift operating device 10 to block the shift operation when the shift operation shafts 10A, 10A are operated to the shift neutral position; The belt cover 8 is configured to be configured to be able to freely switch its posture between a restraint release state and a state in which the speed change operation is allowed, and a flexible portion a that allows the posture of the restraint tool 11 to be changed at a position where the restraint tool 11 of the belt cover 8 is inserted. an engaging portion b that comes into contact with the restraint tool 11 to prevent the belt cover 8 from being removed when the restraint tool 11 is in the restraint release state; A belt cover attaching/detaching device for a mobile vehicle, characterized in that a check groove 11E is provided in which a series of notches c are formed to allow the belt cover 8 to be detached without contacting the tool 11.