JPH0548606U - Arrangement structure of sensors in ground work vehicle - Google Patents

Abstract

(57) [Abstract] [Purpose] To prevent the rear cover movement detection sensor arranged on the rotary from being covered with muddy water or coming into contact with an obstacle as much as possible to prevent the failure or damage of the sensor. [Structure] A rear cover movement detection sensor 29 is arranged in a space surrounded by a gear case 15 for PTO power input and a cylinder 23 for rear cover movement control.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sensor arrangement structure in a ground work vehicle including a rear cover movement control cylinder device and a rear cover movement detection sensor in a rotary connected to a traveling machine body.

[0002]

[Problems to be Solved by Prior Art and Invention]

 Generally, in a rotary connected to this type of ground work vehicle, a rear cover having a plowing depth detection function is always moved to an appropriate position regardless of changes in the plowing depth, and is used for rear cover movement control in order to increase the plowing depth detection accuracy. Although some cylinders are equipped with a cylinder device, in order to feed back the movement status of the rear cover to the control section on the traveling body side, it is necessary to provide a rear cover movement detection sensor for detecting the movement of the rear cover. However, in the past, the rear cover movement detection sensor, which is an electrical component, was placed at the exposed position above the rotary cover, so muddy water is not likely to be splashed during work such as plowing and scraping, and it may contact obstacles. As a result, water and dust intrude into the rear cover movement detection sensor, causing malfunctions and damage due to contact with obstacles, which poses a problem of durability.

[0003]

[Means for Solving the Problems]

 The present invention was devised in view of the above circumstances to provide a sensor arrangement structure in a ground work vehicle capable of eliminating these drawbacks. A ground work vehicle that connects a rotary equipped with a gear case for inputting power, and a rotary equipped with a cylinder device that controls the movement of the rear cover and a rear cover movement detection sensor that detects the movement amount of the rear cover. In the above, the rear cover movement detection sensor is arranged in a space surrounded by the gear case and the cylinder device. With this configuration, the present invention makes it possible to prevent the inconvenience of muddy water and contact with obstacles as much as possible, and prevent failure and damage of the rear cover movement detection sensor. Is.

[0004]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a traveling machine body of a tractor, and a rotary tiller type working section 4 is movably connected to a rear portion of the traveling machine body 1 via an elevating link mechanism 2 and an auto hitch mechanism 3. Then, the working unit 4 moves up and down based on the hydraulic operation of the lift arm 5, and the basic structure of each of them is the same as the conventional one.

By the way, a top hook 7 pivotally connected to the tip of the top link 2a of the elevating link mechanism 2 is fixed to the central upper end portion of the hitch frame 6 which constitutes the automatic hitch mechanism 3, and both left and right end portions of the hitch frame 6 are fixed. A lower hook 8 pivotally connected to the ends of the left and right lower links 2b of the lifting link mechanism 2 is fixedly attached to the upper and lower link mechanisms 2. By raising, the connecting pin 10 on the side of the working unit 4 is automatically engaged with the lower hook 8 so that the working unit 4 is automatically mounted. Reference numeral 11 denotes a PTO connecting portion provided on the hitch frame 6. The input side of the PTO connecting portion 11 is connected to the PTO shaft 13 on the traveling machine body 1 side in advance via the universal joint 12 while the PTO connecting portion 11 is connected to the PTO connecting portion 11. The output side of the connecting portion 11 is configured as a clutch mechanism that is automatically connected to the input shaft 14 on the working portion 4 side in accordance with the above-described automatic mounting, and is automatically separated when the working portion 4 is disconnected. ing.

On the other hand, a gear case 15 is provided at an intermediate portion of the working portion 4 in the left-right direction so as to project the input shaft 14 forward, and the gear case 15 is projected in the left-right direction. In order to transmit the PTO power input by the input shaft 14 to a transmission shaft (not shown) in the cylindrical case 16, a bevel gear (not shown) for changing direction is installed. Then, the power transmitted from the gear case 15 to the transmission shaft in the cylindrical case 16 is further transmitted to a tilling claw shaft 19 provided with a tilling claw 18 via a transmission chain (not shown) in the chain case 17. It is becoming like this. Reference numeral 20 denotes a rotary cover that covers the upper part of the rotation path of the plowing pawl 18, and behind the rotary cover 20, there is provided a rear cover 21 that swings up and down in response to changes in the working depth. The end pivot portion 21a is integrally connected to a guide member 22 that is movable back and forth along an arc of the rotary cover 20.

Further, 23 is a cylinder that is disposed in a rearwardly inclined position behind the gear case 15, and the cylinder 23 is provided between the bracket 22 a of the guide member 22 and the top mast 9. As a result, the rear cover 21 is moved and controlled by the expansion / contraction operation based on the drive of the electric motor 24. Further, the electric motor 24 is connected to a control unit (not shown) on the traveling machine body 1 side through a coupler device 25 which is automatically connected and disconnected when the working unit 4 is automatically attached and detached. That is, the coupler device 25 is composed of a machine side coupler 25a provided on the hitch frame 6 and a working section side coupler 25b provided on the gear case 15 of the work section 4, and the machine side coupler 25a is connected to the machine side wiring, respectively. The working unit side coupler 25b supports the required number of movable contacts 27 respectively connected to the working unit side wirings so that the movable contacts 27 can be retracted and retracted. It is configured by internally mounting a bullet 28 that constantly urges the When the working unit 4 is mounted, the movable contact 27 is elastically abutted against the fixed contact 26 by the urging force of the ammunition 28, so that the contacts can be contacted with each other irrespective of some play and assembling error. It is designed to be connected securely.

Furthermore, 29 is a rear cover movement detection sensor for detecting the movement position of the rear cover 21, and the rear cover movement detection sensor 29 is a so-called potentiometer for detecting the amount of rotation of the sensor input shaft 29 a. The sensor arm 30 is integrally fixed to the sensor input shaft 29a so as to be rotatable integrally with the sensor input shaft 29a, and the lower end of the connecting rod 32 is pivotally connected to the plate 31 projecting from the guide member 22. It is pivoted at the top. That is, when the rear cover 21 moves as the cylinder 23 expands and contracts, the sensor arm 30 connected to the rear cover 21 side via the connecting rod 32 swings, and the amount of rotation of the sensor input shaft 29a associated with the swing. The rear cover movement detection sensor 29 is configured to detect the movement amount of the rear cover 21 based on the detection of the movement of the rear cover 21. The detection signal of the rear cover movement detection sensor 29 is transmitted through the coupler device 25 to the traveling body 1 side. It is designed to be fed back to the control section of.

The rear cover movement detection sensor 29 is attached to a sensor bracket 33 protruding from the upper surface of the rotary cover 20, and its attachment position is the rear position of the gear case 15 and the cylinder 23. It is set to the front position. That is, the mounting position is a dead space surrounded by the rotary cover 20 on the lower side, the gear case 15 on the front side, and the cylinder 23 on the upper side and the rear side, respectively. The effective protection of the sensor 29 can be measured. Further, the sensor mounting portion 33a of the sensor bracket 33 is formed by a U-shaped member having a pair of facing pieces 33b, and the rear cover movement detecting sensor 29 is fixedly mounted on one facing piece 33b, while the other is mounted on the other side. Since the sensor input shaft projecting portion of the rear cover movement detection sensor 29 is located between the opposing pieces 33b by pivotally supporting the boss portion 30a of the sensor arm 30 on the opposing piece 33b, particularly mud, water, dust, etc. The sensor input shaft protrusion, which does not like to be attached, is doubly protected.

Reference numeral 34 is a tilling depth detecting mechanism for detecting the vertical swing angle of the rear cover 21, and the tilling depth detecting mechanism 34 is provided at the control unit on the traveling machine body 1 side so that the rear cover 21 moves up and down. It is configured from the working unit 4 to the automatic hitch mechanism 3 in order to input the moving angle (detected plowing depth). That is, on the working unit 4 side, the detection wire 37 connected to the rear cover 21 via the detection rod 35 and the connection link 36 is provided, and the other end of the detection wire 37 is swingable back and forth in the cylindrical case 16. On the side of the automatic hitch mechanism 3, a follower arm 39 swingable back and forth is provided at the position facing the detect arm 38, and the follower arm 39 is connected to the follower arm 39. A wire 40 (the other end of the connecting wire 40 is connected to a potentiometer connected to a control unit) is connected. When the working unit 3 is connected to the automatic hitch mechanism 3, the detection arm 38 and the driven arm 39 come into contact with each other to be in an interlocking connection state. It is designed to feed back to the 1st side.

In the embodiment of the present invention configured as described above, the working portion 4 is provided with a rear cover movement detection sensor 29 for detecting the movement position of the rear cover 21, and the rear cover movement detection sensor 29 is located below Is arranged in the rotary cover 20, the front is arranged in the gear case 15, and the upper and the rear are arranged in the spaces surrounded by the cylinders 23, respectively, so that the rear cover movement detection sensor 29 is effectively protected. Therefore, as in the conventional case in which the rear cover movement detection sensor 29 is arranged in an exposed state, it is possible to prevent muddy water from coming into contact with obstacles during the work such as plowing and scraping. The durability of the rear cover movement detection sensor 29 is significantly improved by reliably preventing inconveniences such as water or dust entering the movement detection sensor 29 to cause a failure or damage due to contact with an obstacle. be able to.

Moreover, since the position where the sensor is disposed is a dead space which has not been used in the past, the rear cover detection sensor 29 is exposed so that it can contribute to downsizing of the working unit 4 by effectively utilizing the space. You can avoid and improve the appearance.

Further, in the embodiment, the sensor mounting portion 33a of the sensor bracket 33 is formed by a U-shaped member, and the member is configured to surround the sensor input shaft protruding portion of the rear cover movement detection sensor 29. It is possible to more reliably prevent the failure of the rear cover movement detection sensor 29 by double protecting the protruding portion of the sensor input shaft which is reluctant to attach mud, water, dust and the like.

[0014]

[Operation effect]

 In short, since the present invention is configured as described above, the rotary connected to the traveling machine body is provided with the rear cover movement detection sensor for detecting the movement amount of the rear cover, but the rear cover movement detection sensor is , It is arranged in a space surrounded by a gear case provided for inputting PTO power and a cylinder device provided for controlling the movement of the rear cover, and is extremely effectively protected. Therefore, as in the case where the rear cover movement detection sensor is provided at the exposed position of the rotary, muddy water can be prevented from coming into contact with obstacles during the work such as plowing and scraping, and as a result, the rear cover movement detection sensor can be eliminated. The durability of the rear cover movement detection sensor can be remarkably improved by reliably preventing inconveniences such as water or dust invading into the inside to cause a failure or damage due to contact with an obstacle.

Moreover, since the above-mentioned sensor arrangement space is a dead space that has never been used in the past, it is possible that the rear cover detection sensor may be exposed because it may contribute to the downsizing of the rotary by making effective use of the space. You can avoid it and improve the appearance.

[Brief description of drawings]

FIG. 1 is a plan view of a tractor.

FIG. 2 is a side view of the main part of the same.

FIG. 3 is a plan view of a rotary connecting portion.

FIG. 4 is a sectional view of a coupler device.

FIG. 5 is a plan view of a main part of a working unit.

FIG. 6 is a side view of an essential part of the same showing a cylinder contracted state.

FIG. 7 is a side view of the main part of the same showing a cylinder extended state.

[Explanation of symbols]

 1 Traveling Aircraft 4 Working Section 15 Gear Case 21 Rear Cover 23 Cylinder 29 Rear Cover Movement Detection Sensor

Claims (1)

[Scope of utility model registration request] 1. A rotary unit, in which a gear case for inputting PTO power is provided, is connected to a rear portion of the traveling machine body, and a cylinder device for controlling the movement of the rear cover and a rear cover for detecting the movement amount of the rear cover are further connected to the rotary. A ground work vehicle provided with a movement detection sensor, wherein the rear cover movement detection sensor is arranged in a space surrounded by a gear case and a cylinder device.