JPH089109Y2 - Winding structure of power cord in electric mobile agricultural machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a winding structure for a power cord in an electric mobile agricultural machine that is operated by the driving force of an electric motor.

[Problems to be Solved by Prior Art and Invention] In general, some mobile agricultural machines of this type are configured to be operated by driving an electric motor connected to a fixed power source through a long power cord. By the way, in such a device, there is a fear that a long power cord is stepped on or entangled with the working portion during work, and therefore a take-up reel is provided to wind extra cord.

However, the conventional take-up reel is equipped with a rotary electric commutator having a complicated structure composed of a slip ring and a brush, and the power cord and the electric motor are connected through the rotary electric communicator, so that the brush wears. For example, there is a fear that the take-up reel may be damaged due to such reasons, and the reliability of the take-up reel may be inferior.

Therefore, it is proposed to provide a winding device with the middle portion of the power cord as the winding start point, but when the power cord is wound on the winding drum, if it is loose, the power cord will be entangled and the unwinding will be smooth. Therefore, it is proposed that the winding drum be always charged in the direction in which the power cord is wound so that the power cord is wound in a slack preventing state. However, in this case, the power cord is always in a tension state against the stored force, that is, a state in which it is pulled toward the winding drum side, and there is a problem that the insertion plug at the tip easily comes off from the power outlet. There's a problem.

[Means for Solving the Problems] The present invention was devised with the object of providing a winding structure for a power cord in an electric mobile agricultural machine that can eliminate these drawbacks in view of the above circumstances. An electric mobile agricultural machine that is operated by driving an electric motor connected to a fixed power source through a long power cord, wherein the electric mobile agricultural machine has an intermediate power cord connected to the electric motor. When a winding reel whose starting point is a winding portion is provided, and the winding reel and the power supply motor are linked in an interlocking manner via a forward / reverse transmission path that can be stopped, the reverse rotation transmission path is used to move a mobile agricultural machine. The winding speed of the power cord is set to be slower than the speed, and the reverse rotation transmission path is provided with a one-way clutch that receives the tension of the power cord and idles the winding reel. .

The present invention, with this configuration, is capable of improving reliability by simplifying the structure and assuming that there is no failure.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a mobile agricultural machine that is mainly used indoors, and the mobile agricultural machine 1 is of a walking type in which a handle 2 and a rotary working unit 3 are provided in a rear portion. The drive of the section 3 and the traveling wheels 4 is performed by an electric motor 5 mounted on the front part of the mobile agricultural machine 1.

Reference numeral 6 denotes a plowing depth adjusting device provided at the rear end of the rotary cover 7 of the working unit 3, wherein the plowing depth adjusting device 6 rotatably supports an adjusting handle 9 on the upper end of a support pipe 8 while lowering the lower end. The tail wheel 10 is supported by the tail wheel 10, and the tail wheel support shaft 10a which is inserted into the support pipe 8 from below is attached to the handle shaft 9a
The tail wheel 10 can be vertically adjusted by rotating the adjustment handle 9 by screwing the tail handle 10 up and down. The support pipe 8 is vertically slidably fitted and supported by a boss 11 fixed to the rotary cover 7, and is vertically moved by a pair of upper and lower setting rings 12 fixed to the support pipe 8. Although the range is restricted, it is always urged downward by the ammunition 13 interposed between the lower setting ring 12. That is, in the working depth adjusting device 6, the working depth is adjusted in advance by the adjusting handle 9 so that the working depth becomes shallower than the target working depth, and the handle 2 is pressed downward against the ammunition 13 during work. Arbitrary working depth can be adjusted. Reference numeral 14 is a fixing bolt screwed to the boss 11 so that the support pipe 8 can be fixed.

Further, 15 is a guide plate which is attached to the support arm 16 of the tail wheel 10 such that the vertical position can be adjusted.
Are formed so as to cover the front and left and right sides of the tail wheel 10 and have a sharp tip. That is, the guide plate 15
Forms a flat tail wheel traveling path by pushing the tilled soil cultivated in the working unit 3 to the left and right, and further, the guide plate 15
Flange portions 15a are formed at the left and right upper edge portions of the so as to prevent the cultivated soil that has been pushed apart from falling into the guide plate 15.

On the other hand, 17 is a long power cord whose base end is directly connected to the electric motor 5, and the outlet of the power cord 17 is provided with an outlet 17a connectable to a fixed power source. A weight 17b is attached to the.

Furthermore, 18 is a reel frame fixed to the machine frame 1a.
A take-up reel 18 is rotatably provided on the take-up reel 18. The take-up reel 18 is connected to the wheels 4 from the axle 4a so as to interlock with the wheels 4.
The power is input via the
A partition plate 18a is provided for partitioning the take-up portion into right and left, and the intermediate portion of the power cord 17 is locked in the partition plate 18a in a penetrating manner. That is, in the take-up reel 18, the fixed power source side half and the motor side half of the power cord 17 are passed through the first guide roller 21 provided in the working unit 3 and the second guide roller 22 provided in the reel frame 19. The left and right winding sections are separately accommodated for winding.

In addition, a forward / reverse and stop operation mechanism for the take-up reel 18, a mechanism for preventing excessive winding at the time of winding operation, a mechanism for preventing loosening at the time of rewinding operation, a mechanism for preventing damage due to an abnormal load, etc. are provided in this device. More specifically, the forward / reverse and stop operation mechanism includes a forward rotation transmission path 23 and a reverse rotation transmission path 24 in the transmission path from the forward / reverse operation axle 4a to the take-up reel 18, and the forward / reverse operation of the operation lever 25. It is composed of tension pulleys 26, 27 that connect and disconnect the power transmission of each transmission path 23, 24 based on the reverse rotation and stop operation, and the overwinding prevention mechanism at the time of winding operation is overwinding. The first guide roller 21 is configured to detect and swing by the tension of the power cord 18 in the state, and the first guide roller 21 is connected to the wire in order to cut off the transmission to the take-up reel 18 in accordance with the detection swing. It is configured to be connected to the tension pulley 26 of the forward rotation transmission path 23 via 28. On the other hand, the slack prevention mechanism at the time of rewinding operation sets the rewinding speed of the power cord 17 to be slower than the moving speed of the mobile agricultural machine 1 in advance, and causes an insufficient rewinding amount by the idling of the take-up reel 18. In order to make up for the return, a one-way clutch 29 that receives the tension of the power cord 17 and idles the take-up reel 18 is provided in the reverse rotation transmission path 24. Furthermore, the mechanism for preventing damage due to an abnormal load is constructed by interposing a torque clutch 30 in the transmission path.

In the embodiment of the present invention constructed as described above, the take-up reel 18 is provided with the power cord 17 based on the traveling of the mobile agricultural machine 1.
However, the intermediate part of the power cord 17 is used as the winding start point, and the fixed power supply side half part and the motor side half part of the power supply cord 17 are wound at the same time. The base end of 17 can be directly connected to the electric motor 5.

As described above, the present invention has been embodied in a long power cord for connecting the electric motor 5 to a fixed power source.
Although the power supply cord 17 is configured to be wound and accommodated in the winding reel 18, the power cord is formed by using the cord intermediate portion as the winding start point without using the cord base end as the winding start point as in the conventional case.
Since 17 is wound, the base end can be directly connected to the electric motor 5. Therefore, it is possible to construct an extremely simple winding mechanism without using a rotary electric machine composed of a slip ring, a brush, etc. As a result, it is possible to achieve high reliability without fear of failure. It is possible to provide an inexpensive winding mechanism.

Moreover, the take-up reel 18 is divided into left and right by the partition plate 18a,
Since the fixed power supply side half and the motor side half of the power supply cord 17 are wound separately, it is possible to prevent the power supply cord 17 from being entangled and to perform orderly winding.

Furthermore, since a weight 17b is attached to the power cord 17, it is permissible that a suitable tension is always applied to the power cord 17 so that the rewinding operation can be smoothly performed, or a problem in which a pull load is directly applied to the outlet 17a is prevented. You can

Further, in the above-described embodiment, since the work is performed while compressing the ammunition machine 13 that constantly urges the tail wheel 10 downward, when it is desired to temporarily reduce the working depth (the rotary claw is artificially cultivated). When the mobile agricultural machine 1 is lifted with an extremely light operating force by utilizing the restoring force of the ammunition machine 13 when it comes into contact with the board), the operability can be significantly improved.

Further, since the tail wheel 10 is provided with the guide plate 15, the tail wheel 10 does not move up and down by the tilling soil, and always runs stably on the tiller, so that the tilling depth is constant. It is possible to perform highly accurate plowing work.

Moreover, the take-up reel 18 is set to a take-up speed slower than the traveling speed of the mobile agricultural machine, and the shortage of the take-up amount due to this is taken up by the one-way clutch 29 provided in the reverse rotation transmission path.
By supplementing with idling of 18, it is possible to prevent looseness of the power cord 17 during the winding operation without difficulty,
The looseness of the power cord 17 can be eliminated.

[Effects] In summary, since the present invention is configured as described above, an extra power cord is provided so that there is no trouble such as stepping on a long power cord or entangled with a working part during work. A take-up reel for winding is provided, but the take-up reel does not take the base end of the cord as the winding start point as in the conventional case, but takes up the power cord with the intermediate portion of the cord as the winding start point. , The power cord can be directly connected to the electric motor. Therefore, it is possible to configure a simple winding mechanism without providing a rotary electric machine configured by using a slip ring or a brush, and as a result, it is possible to reduce failures and increase reliability. A winding mechanism can be provided at low cost.

Moreover, since the power of the electric motor is used to wind and pull out the power cord with the take-up reel, there is no trouble that the power cord is pulled and the insertion plug is pulled out from the power outlet, but the power cord does not When wound, the take-up reel is set to a slower take-up speed than the traveling speed of the mobile agricultural machine, and the shortage of the take-up amount that accompanies this is caused by the one-way clutch provided in the reverse rotation transmission path. In addition, the power cord can be prevented from loosening during the winding operation without difficulty.
As a result, as in the case where the winding drum is configured to constantly store energy on the cord winding side in order to prevent looseness of the power cord, this energy-accelerating force acts to prevent the plug at the tip of the cord from coming out of the power outlet. You can prevent this.

[Brief description of drawings]

The drawings show an embodiment of a winding structure of a power cord in a transmission type mobile agricultural machine according to the present invention. FIG. 1 is a side view of the mobile agricultural machine, and FIG. 3, FIG. 3 is a sectional view of the main part of the same as above, FIG. 4 is a plan view, a side view, and a rear view of a guide plate, respectively, FIG. 4 is a plan view of a winding mechanism, and FIG. FIG. 7 is a left side view of the winding mechanism, FIG. 7 is a right side view of the same as above, FIG. 8 is a transmission circuit diagram of the same as above, and FIG. 9 is a plan view of a winding mechanism showing a conventional example. In the figure, 1 is a mobile agricultural machine, 3 is a working unit, 5 is an electric motor, 17
Is a power cord and 18 is a take-up reel.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Akemi Morita, 667 Izumo-cho, Higashi-Izumo-cho, Yatsuka-gun, Shimane Prefecture 1 Mitsubishi Agricultural Machinery Co., Ltd. (56) References Japanese Patent Publication Sho 56-4468 (JP, B2)

Claims (1)

[Scope of utility model registration request] 1. An electric mobile agricultural machine operated by driving an electric motor connected to a fixed power source through a long power cord, wherein the electric mobile agricultural machine has an intermediate power cord connected to the electric motor. When a winding reel whose starting point is a winding portion is provided, and the winding reel and the power supply motor are linked in an interlocking manner via a forward / reverse transmission path that can be stopped, the reverse rotation transmission path is used to move a mobile agricultural machine. The motorized movement is characterized by setting the winding speed of the power cord to be slower than the speed, and providing a one-way clutch in the reverse rotation transmission path that makes the take-up reel idle by receiving the tension of the power cord. Power cord winding structure for agricultural machinery.