JP3399190B2 - Body rolling equipment for work vehicles - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body in a work vehicle such as an agricultural work vehicle such as a combine or a transport vehicle.
Related to a ring device. 2. Description of the Related Art Conventionally, as this kind of vehicle body rolling device, there is a technology disclosed in Japanese Utility Model Laid-Open No. 5-68888. Also, JP-A-6-227449 discloses that
Hydraulic pressure on the opposite side of the rolling arm from the connecting rod
The technology of the body rolling device that arranges cylinders is described.
Have been. Japanese Patent Application Laid-Open No. 4-24177 discloses a system.
There is a description of the technology for connecting the Linda with connecting pins.
You. [0003] The aforementioned Japanese Utility Model Laid-Open No. 5-687.
In the technique described in Japanese Patent Publication No. 88 , a compressive force is applied between the hydraulic cylinder of the connecting rod and the rolling arm, and the rod is easily buckled. Further, it is necessary to configure the connecting rod so as to sandwich the hydraulic cylinder, and there is a disadvantage that it cannot be configured with a simple rod. Also, JP-A-6-227449
In the technology described in Japanese Patent Publication No.
Indicates the position of the potentiometer that
Not . Further, the technique described in Japanese Patent Application Laid-Open No.
In operation, the port that detects the stroke of the hydraulic cylinder
The position of the tension meter is not shown. The present invention has been made to solve the problems of the conventional technology, and has taken the following technical measures. [0005] The present invention provides an airframe frame.
A frame 1 and a traveling frame 2 which can be raised and lowered with respect to the body frame 1 are pivotally supported by front and rear rolling arms 3 and 3 to constitute a parallel swing link mechanism 4 . -While connecting the upper ends of the ring arms 3 and 3 with the connecting rod 12,
The connecting portion 12a of the connecting rod 12 is a rolling arm.
A hydraulic cylinder 13 is provided on the opposite side of the hydraulic cylinder 13, and a piston rod 13 a of the hydraulic cylinder 13 is connected to a connecting portion 12 a of the connecting rod 12 by a connecting pin 14 to move the connecting rod 12 toward the hydraulic cylinder 13 . The lifting arm is configured to lift the fuselage by a pulling operation.
3 and the rolling shaft 2 with respect to the traveling frame 2
Between the inner and outer bushes 22, 2 between the boss 21 of the
2, an eccentric cam 23 is provided through
Potentiometer 1 for detecting the stroke of the cylinder 13
5 is arranged on the connecting portion 12a of the connecting rod 12,
Of the first rolling arm 3a of the rolling arm 3
The sensor guide 19 provided on the distal end portion, the sensor guide 19
Is transmitted to the rotation shaft 16 of the potentiometer 15
It is characterized in that it is configured to be . When the hydraulic cylinder 13 expands and contracts, the front and rear rolling arms 3 and 3 swing through the connecting rod 12 , and the traveling frame 2 moves up and down with respect to the body frame 1 . I do. The connecting rod 12 is pulled by the retracting operation of the piston rod 13a of the hydraulic cylinder 13 , and the traveling device is lowered to lift the body. To provide the eccentric cam 23
Thus, errors in arm length due to assembly are absorbed. Ma
A connecting rod connecting the front and rear rolling arms 3 and 3
12 is kept horizontal, and potentiometer 15 is
The tilt angle of the rolling arm 3 is detected. Therefore, according to the structure of the present invention, the low
With respect to the connecting rod 12 that swings the ring arm 3 , only the pulling force of the hydraulic cylinder 13 needs to be considered, so that the connecting rod 12 can be made thin. In addition, instead of a double connecting rod (link) as in the related art, it can be configured by a single simple rod. In addition, since a heavy hydraulic cylinder can be installed on the rear side of the machine body, the balance of the machine body is also improved. Connecting shaft 11 and boss 2 of rolling arm 3
1 between the inner and outer bushes 22, 22.
The system is provided with a
The length error of the ring arm 3 can be absorbed,
Movement is performed smoothly. Further, the hydraulic cylinder 13
Potentiometer 15 for detecting stroke is in horizontal state
Provided at the connecting portion 12a of the connecting rod 12 maintained at
Therefore, the posture change of the potentiometer 15 can be prevented,
For accurate detection of the angle of the rolling arm 3
become. An embodiment of the present invention will be described below with reference to the drawings. First, in FIG. 1, a body frame 1 and a traveling frame 2 which can be raised and lowered with respect to the body frame are pivotally supported by front and rear rolling arms 3, 3 to provide a parallel swing link mechanism. 4. A crawler drive sprocket 6 which is supported on the body frame 1 through a transmission case 5 through a transmission case 5, a plurality of crawler grounding wheels 7 supported on the traveling frame 2 and a crawler A structure in which a crawler belt 9 is wound around each of the tensioning wheels 8, and a crawler belt 9 is rotated by driving a crawler driving sprocket 6 by power from a transmission device in a transmission case 5. It is. Support shafts 10, 10 are provided before and after the body frame 1, and rolling arms 3, 3 are swingably supported on the support shafts 10, 10, respectively. Rolling door
The arms 3, 3 are formed in the shape of a side view with the support shaft 10 in the middle so as to be composed of a first rolling arm 3a, 3a and a second rolling arm 3b, 3b. The traveling frame 2 is a pair of front and rear second rolling arms 3.
b, 3b are connected to the free ends via a connecting shaft 11,
A pair of front and rear first rolling arms 3a, 3a have their upper ends connected by a connecting rod 12, and the connecting portion 12a at the rear end of the connecting rod 12 extends rearward from the rear rolling arm 3. The piston rod 13a of the hydraulic cylinder 13 and the connecting pin 1
4 and the hydraulic cylinder 13 of the connecting rod 12
An interlocking configuration is used to raise the aircraft by pulling it to the side. That is, the front and rear rolling arms 3 and 3 are swung about the front and rear support shafts 10 by the expansion and contraction operation of the hydraulic cylinder 13, and the traveling frame 2 is moved relative to the body frame 1. Moves up and down, but the hydraulic cylinder 1
When the link 3 is operated in the shortening direction, the connecting rod 12 is pulled rearward, and the front and rear rolling arms 3 and 3 are swung clockwise about the support shaft 10 to rotate the traveling frame 2. Since the vehicle is lowered while maintaining the parallel state with respect to the body frame 1, the body is lifted in a direction in which the ground height is increased. 2 to 4, a potentiometer 15 for detecting the stroke of the hydraulic cylinder 13 is provided on the connecting portion 12a of the connecting rod 12 so that the inclination of the rolling arm 3 can be directly detected. Make up. The sensor guide 1 is integrated upward from the tip of the first rolling arm 3a.
9 is extended, and a pin 18 at the tip of a crank 17 extending upward from a rotation shaft 16 of a potentiometer 15 is locked and held by the sensor guide 19. Accordingly, when the rolling arm is displaced in a swinging manner, the crank 17 is rotated by the sensor guide 19 which is displaced in synchronization with the swinging arm, and the rotation of the shaft 16 causes the potentiometer 15 to tilt the inclination angle of the rolling arm. Is detected. Since the connecting rod connecting the front and rear rolling arms always keeps a horizontal state, the attitude of the potentiometer installed on the connecting rod does not change even when the body is moved up and down. Therefore, the angle of the rolling arm can be accurately detected. Reference numeral 20 denotes a mounting plate. In the embodiment shown in FIGS. 5 and 6, between the connecting shaft 11 of the rolling arm 3 for the traveling frame 2 and the boss 21 of the rolling arm, inner and outer bushes 22, 22 are provided. Eccentric cam 23 through
Is provided. This eccentric cam absorbs an error of the arm length due to the assembling, and makes the vertical movement of the vehicle body smooth. The eccentric amount e of the eccentric cam is 2 to 2.
About 3 mm is sufficient. Referring to FIGS. 7 and 8, the crawler tensioning wheel 8 is provided with a wheel support arm 24 for supporting the same in a support case 25 provided on the upper part of the running frame 2. It is slidably inserted and supported. Craw Latin bolt 26
Are arranged in the vertical space between the wheel body 8 and the rearmost wheel 7, and the wheel body 8 is slid and adjusted by turning the bolt 26. A tension bolt receiving nut 27 is provided on the wheel support arm 24 side, and a tension bolt receiver 28 is provided on the support case 25 side. The connection case 11 for the rolling arm is pierced through the support case 25 so that the support case itself is reinforced. A carrier roller 29 that contacts and supports the return path of the crawler belt 9 from below is provided on the extension axis of the support shaft 10 of the rolling arm 3. Of the rolling wheels 7a, 7b, 7c, 7d, 7e, the first rolling wheel 7a on the driving sprocket 6 side and the final rolling wheel 7e on the tensioning wheel body 8 side are inner rolling wheels as shown in FIG. The wheel width D2 outside the width D1 is made wider outward. In FIG. 10 and FIG. 11, the body frame 1 and the traveling frame 2 are connected to the front and rear rolling arms 3,3.
The hydraulic cylinder 13 is disposed at an intermediate portion between the center of gravity G1 when the vehicle is empty and the center of gravity G2 when the paddy is fully loaded. The hydraulic cylinder is directly connected to the body frame 1 and the traveling frame 2 because the cylinder itself is located below the piston rod 1.
3a is arranged in the up-down direction so as to be located above and pivotally connected. Therefore, according to such a configuration, the configuration is extremely simple as a whole, the number of parts can be largely reduced, and the configuration can be implemented at low cost.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a traveling device for a crawler. FIG. 2 is a side view of a main part. FIG. 3 is a plan view of a main part. FIG. 4 is a rear view of a main part. Cut side view [Fig. 6] Main part cut rear view [Fig. 7] Main part side view [Fig. 8] Main part plan view [Fig. 9] Main part cut back view [Fig. 10] Main part side view [Fig. Rear view of parts [Description of symbols] 1 ... frame, 2 ... running frame, 3 ... rolling arm, 3a ... first rolling arm, 4 ... parallel swing link mechanism, 5 ... transmission cage , 6 ... drive sprocket, 7 ...
Rolling wheel, 8 ... Tensioning body, 9 ... Crawler belt, 10 ... Support shaft, 11 ... Connection shaft, 12 ... Connection rod, 12a ... Connection
Parts, 13 ... hydraulic cylinder, 14 ... connecting pin, 15 ... Potenshiome - motor, 16 ... pivot shaft, 17 ... Crank, 18 ...
Crank pin, 19: sensor guide, 20: mounting plate, 2
DESCRIPTION OF SYMBOLS 1 ... Boss part, 22 ... Bush, 23 ... Eccentric cam, 24 ...
Wheel support arm, 25: support case, 26: tension bolt, 27: tension bolt receiving nut, 28: tension bolt receiver, 29: carrier roll.

Claims (1)

(57) [Claims 1] An airframe 1 and a traveling frame 2 which can be raised and lowered with respect to the airframe 1 are rolled up and down by rolling arms 3 and 3, respectively. A parallel swing link mechanism 4 is pivotally supported to connect the upper ends of the front and rear rolling arms 3 and 3 with a connecting rod 12, and a connecting portion 12a of the connecting rod 12 is connected to a rolling arm. A hydraulic cylinder 13 is provided on the opposite side of the hydraulic cylinder 13, and a piston rod 13 a of the hydraulic cylinder 13 is connected to a connecting portion 12 a of the connecting rod 12 by a connecting pin 14 to move the connecting rod 12 toward the hydraulic cylinder 13 . The lifting arm is configured to lift the fuselage by a pulling operation.
Between the connecting shaft 11 and the boss 21 of the rolling arm 3
And the eccentric cam 23 via the inner and outer bushes 22
And the stroke of the hydraulic cylinder 13 is
Connect the detecting potentiometer 15 to the connecting rod 12
The rolling arm 3
A sensor guide 19 is provided at the tip of the first rolling arm 3a.
And the movement of the sensor guide 19 is controlled by the potentiometer.
A vehicle body rolling device for a working vehicle, wherein the vehicle body rolling device transmits the rotation to a rotating shaft 16 of a motor 15 .