JP2006025736A - Agricultural work vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an agricultural work vehicle preventing the lock-canceling state of a pin-lock member. <P>SOLUTION: The agricultural work vehicle 4 has a machine body 21 provided with a three-point connection part 22 connected with a quick coupler 3 and having an upper engaging recess 11 engaging with a top pin 7, a lower engaging recess 12 engaging with a lower pin 8 and a pin-locking member 15 to lock the lower pin 8 and prevent the escape of the lower pin 8 from the lower engaging recess 12. A linchpin to restrict the downward rotation of the pin lock member 15 and keep the pin lock member 15 in locked state is detachably attached to the pin attaching part 30 of the three-point connection part 22 of the body 21. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an agricultural machine used in connection with a quick coupler.

  2. Description of the Related Art Conventionally, a quick coupler (auto hitch frame) is known as one that facilitates the connection of a farm work machine to a three-point link hitch portion (work machine lifting support device) of a tractor.

The quick coupler is, for example, an upper engagement recess that engages with a top pin mounted on the tip of the top mast of the agricultural machine, and a lower engagement recess that engages with a lower pin mounted on the left and right lower arms of the farm machine. It is provided corresponding to each lower engagement recess, and it is locked to prevent the lower pin from being pulled out from the lower engagement recess by turning in one direction, and the lower pin from the lower engagement recess is turned by turning in the other direction. It has a configuration provided with a rotatable pin lock member (hook member) that is in an unlocked state permitting extraction (see, for example, Patent Document 1).
JP 2003-325003 A

  However, when a farm work machine is connected to the three-point link hitch of the tractor via the quick coupler using the quick coupler configured as described above, the pin lock member of the quick coupler is unintentionally unlocked during work. There is a risk of becoming.

  This invention is made | formed in view of such a point, and it aims at providing the agricultural machine which can prevent that the pin lock member of a quick coupler will be in a lock release state unintentionally.

  The agricultural machine according to claim 1, wherein an upper engaging recess engaging with a top pin, a lower engaging recess engaging with a lower pin, and extraction of the lower pin from the lower engaging recess by rotation in one direction. Agricultural work used in connection with a quick coupler having a pivotable pin lock member that is in a locked state that prevents the lower pin from being pulled out of the lower engaging recess by turning in the other direction. A machine having a rotation regulating member that regulates rotation of the pin lock member and maintains the pin lock member in the locked state, and a work body that is provided on the machine and performs farming work It is.

  And since the rotation restricting member restricts the rotation of the pin lock member and maintains the pin lock member in the locked state, it is possible to prevent the pin lock member of the quick coupler from being unintentionally unlocked. It is.

  According to a second aspect of the present invention, in the agricultural machine according to the first aspect, the rotation restricting member is a lynch pin that is detachably attached to a pin attaching portion of the airframe.

  And, by attaching a lynch pin, which is a rotation restricting member, to the pin mounting portion of the fuselage, the pin lock member can be properly maintained in the locked state by this lynch pin, and if the lynching pin is removed from the pin mounting portion of the fuselage, the pin The lock member can be brought into the unlocked state.

  According to the first aspect of the invention, since the rotation restricting member restricts the rotation of the pin lock member and maintains the pin lock member in the locked state, the pin lock member of the quick coupler is unintentionally unlocked. Can be prevented.

  According to the invention which concerns on Claim 2, a pin lock member can be appropriately maintained in a locked state with this lynch pin by attaching the lynch pin which is a rotation restricting member to the pin mounting part of the airframe, and the lynch pin can be The pin lock member can be unlocked by removing it from the mounting portion.

  An embodiment of an agricultural machine according to the present invention will be described with reference to the drawings.

  In FIG. 1, reference numeral 1 denotes a tractor which is a traveling vehicle. The tractor 1 has a three-point link hitch portion (worker lifting support device) 2 at a rear portion. A quick coupler (auto hitch frame) 3 is attached to the three-point link hitch portion 2 of the tractor 1, and a towed agricultural machine 4 is connected to the quick coupler 3. That is, the agricultural machine 4 is connected to the three-point link hitch portion 2 of the tractor 1 via the quick coupler 3.

  Note that the farm work machine 4 moves the field forward by, for example, traveling (traction operation) of the tractor 1 and moves the soil at a deep position in the field (working depth is 30 to 45 cm, for example). It is a tilling machine (chisel plow) that till till the soil.

  As shown in FIGS. 1 and 3 to 5, the quick coupler 3 includes a substantially triangular coupler body 6. On the upper part of the coupler main body 6 are formed upper and lower engaging recesses 11 which are detachably engaged with the top pin 7 of the agricultural machine 4 in two steps, and each upper engaging recess 11 is concave upward. It is. On the left and right sides of the lower part of the coupler main body 6 are formed a pair of left and right lower engaging recesses 12 that are detachably engaged with the lower pins 8 of the agricultural machine 4, and each lower engaging recess 12 is concave toward the rear. It is.

  Further, the coupler body 6 has a convex portion 14 located on the rear side of the lower pin 8 by turning in one direction (upward) about the left and right axis 13, and the lower pin 8 from the lower engaging concave portion 12. The protrusion 14 is separated from the rear side of the lower pin 8 by turning in the other direction (downward) about the left and right axis 13 to prevent the lower pin 8 from coming into the lower engagement recess 12. A pair of left and right hook-like pin lock members (hook members) 15 that are unlocked to allow removal are attached to the shaft 13 so as to be pivotable in the vertical direction, and each pin lock member 15 has a corresponding lower engagement. It is disposed in the vicinity of the recess 12.

  The pin lock member 15 can be selectively switched between the locked state and the unlocked state by operating the operation lever 16. Although not shown, a biasing means such as a spring for biasing the pin lock member 15 and holding it in a locked state or unlocked state is attached.

  As shown in FIGS. 1 to 5, the farm work machine 4 includes a machine body (work body mounting frame) 21 connected to the quick coupler 3. The machine body 21 has a three-point connecting portion 22 connected to the quick coupler 3 at the front portion and a work body attaching portion 23 at the rear portion.

  The three-point connecting portion 22 has one top mast 25 protruding from the frame portion 24 that is elongated in the left-right direction and two lower arms 26 in a pair of left and right, and an upper engaging recess at the front end of the top mast 25 A top pin 7 in the left-right direction is attached so as to enter into the upper engaging recess 11 and detachably engage with the upper engaging recess 11. The lower engaging recess 12 enters the lower engaging recess 12 at the front end of the lower arm 26. A left and right lower pin (lock pin) 8 detachably engaged with 12 is attached in a state where it is secured by an R pin 27 and an E ring 28.

  Further, a U-shaped frame 31 constituting the pin mounting portion 30 is fixed to the front end portion of the lower arm 26, and the U-shaped frame 31 is formed with a pin hole portion 32 penetrating in the left-right direction.

  The pin hole 32 of the U-shaped frame 31 has a lower surface of the pin lock member 15 in a locked state when the farm work machine 4 is connected to the three-point link hitch portion 2 of the tractor 1 via the quick coupler 3. The lynch pin 35, which is a rotation restricting member that keeps the pin lock member 15 locked by restricting the downward rotation of the pin lock member 15 by being in contact with the pin lock member 15, is attached in a state where it is prevented from being removed. It has been. That is, the lynch pin 35 is detachably attached to the pin attachment portion 30 of the lower arm 26 of the three-point connecting portion 22 of the fuselage 21, and the pin lock member 15 in the locked state at the pin portion 36 in the left-right direction of the attached lynch pin 35. Rotation of the pin lock member 15 is restricted, and the pin lock member 15 is maintained in the locked state.

  Further, when the farm machine 4 is disconnected, the spring part 37 of the lynch pin 35 is rotated as shown by a two-dot chain line in FIG. 2, and then the lynch pin 35 is removed from the pin attachment part 30 of the machine body 21. 4, the pin lock member 15 is unlocked by rotating the pin lock member 15 downward by operating the operation lever 16.

  As shown in FIGS. 2 and 3, the lynch pin 35 has a pin portion 36 and a spring portion 37 that is rotatably provided on the pin portion 36. The pin portion 36 includes a shaft portion 41 that can be inserted into the pin hole portion 32 of the U-shaped frame 31 and a head portion 42 provided at one end of the shaft portion 41. The spring portion 37 has a connection portion 43 that is rotatably connected to the head portion 42 of the pin portion 36 at the base end portion, and has a substantially arc shape that contacts the other end of the shaft portion 41 of the pin portion 36 at the distal end portion. The abutting portion 44 is provided.

  Further, as shown in FIG. 1, a work body 51 that performs farming work, for example, tillage work, is attached to the work body mounting portion 23 of the machine body 21.

  The working body 51 has a vertically long frame 52 that is slightly curved, and a metal first cutting that cuts and lifts soil (mainly subsoil) in the field with a predetermined working width on the front side of the lower end of the frame 52. A chisel 54 having a first earth work plate portion (blade plate portion) 53 as a surface portion on the front surface portion is attached, and a wing 55 is attached to the rear side of the lower end portion of the frame 52.

  Further, the frame 52 is positioned along the front edge of the frame 52 and receives the soil from the first soil work plate 53 with a predetermined work width and lifts it up to the vicinity of the field surface and cuts the soil on the field itself. Then, a cutting member 57 having a second earth work plate part (center board part) 56 as a second cutting surface part made of synthetic resin that is lifted up to the vicinity of the field surface is attached. Further, the frame 52 is a synthetic earth reversal surface portion that receives a soil from the second earth work plate portion 56 with a predetermined work width, lifts it up to the upper surface of the field, and reverses it to the side. A reversing member 59 having a plate portion (top board portion) 58 on the front surface portion is attached.

  In addition, the 1st earth work board part 53 and the 2nd earth work board part 56 are located adjacent to each other up and down, and the 2nd earth work board part 56 and the third earth work board part 58 are located next to each other vertically. To do. Further, the second earth work plate portion 56 made of a synthetic resin, which is hard to adhere to the soil, is detachably provided on the metal reinforcement plate portion 60 of the cutting member 57 so as to overlap the reinforcement plate portion 60. The third earth work plate 58 made of synthetic resin which is difficult to adhere is detachably provided on the metal reinforcing plate 61 of the reversing member 59 so as to overlap the reinforcing plate 61.

  Next, the operation and the like of the one embodiment will be described.

  When connecting the three-point connecting portion 22 of the machine body 21 of the agricultural machine 4 to the quick coupler 3 mounted in advance on the three-point link hitch portion 2 of the tractor 1, first, the agricultural machine 4 is connected to the upper engaging recess 11 of the quick coupler 3. The top pin 7 of the three-point connecting portion 22 of the machine body 21 is hooked to engage the upper engaging recess 11 and the top pin 7 with each other.

  Next, the three-point link hitch portion 2 of the tractor 1 is actuated to slightly lift the entire farming machine 4, and the lower pin 8 of the three-point connecting portion 22 of the machine body 21 enters the lower engagement recess 12 to engage the lower portion. The recess 12 and the lower pin 8 are engaged with each other.

  Thereafter, the pin lock member 15 is turned upward by operating the operation lever 16 to lock the pin lock member 15, and the convex portion 14 of the pin lock member 15 is located behind the lower pin 8 in the lower engagement recess 12. So that the lower pin 8 does not come out of the lower engaging recess 12.

  Next, the lynch pin 35 is attached to the pin attachment portion 30 of the machine body 21 so that the locked pin lock member 15 does not rotate downward about the shaft 13. That is, the pin lock member 15 is maintained in the locked state by restricting the downward rotation of the pin lock member 15 in the locked state by the lynch pin 35.

  When the farm work machine 4 is moved forward by the traveling of the tractor 1 with the farm work machine 4 connected to the three-point link hitch portion 2 via the quick coupler 3 in this way, the second of the chisel 54 of the work body 51 is moved. The soil in the field is cut and lifted by the first earth work board 53 and the second earth work board 56 of the cutting member 57. Then, the lifted soil is reversed and released at the third earth work plate portion 58 of the reversing member 59, for example, toward the right side in the traveling direction.

  In addition, after removing the farming machine 4 from the quick coupler 3 after completing the tillage work, the pin lock member 15 is rotated downward by operating the operation lever 16 after removing the lynch pin 35 from the pin mounting portion 30 of the machine body 21. The lever lock member 15 is brought into the unlocked state.

  According to the agricultural machine 4 of the above-described embodiment, the lynch pin 35 of the agricultural machine 4 regulates the downward rotation of the pin lock member 15 of the quick coupler 3 and maintains the pin lock member 15 in the locked state. Further, it is possible to prevent the pin lock member 15 of the quick coupler 3 from being unintentionally unlocked at the time of farm work by the work body 51, and to reliably prevent the farm work machine 4 from falling off.

  Note that the rotation restricting member is not limited to the one composed of the lynch pin 35 that can be attached to and detached from the pin attaching portion 30 of the airframe 21. For example, the restricting position and the pin lock member that restrict the downward rotation of the pin lock member 15 It may be composed of a movable member or the like that is movable between permissible positions that allow 15 downward rotations. In addition, the farm work by the working body 51 is not limited to the tilling work, and is arbitrary, for example, a pricking work, a padding work, a sowing work, or the like.

It is a side view which shows one Embodiment of the agricultural machine of this invention. It is a partial top view of an agricultural working machine same as the above. It is a partial side view of an agricultural working machine same as the above. It is a partial side view in the state where the lynch pin of the agricultural working machine same as the above was removed. It is a disassembled side view of the coupler for connecting an agricultural working machine same as the above to a tractor.

Explanation of symbols

3 Quick coupler 4 Farm machine 7 Top pin 8 Lower pin
11 Upper engaging recess
12 Lower engaging recess
15 Pin lock member
21 Aircraft
30 pin mounting
35 Lynch pin as a rotation restricting member
51 Work body

Claims (2)

An upper engaging recess that engages with the top pin, a lower engaging recess that engages with the lower pin, and a locking state that prevents the lower pin from being pulled out of the lower engaging recess by turning in one direction. A farm machine that is used by being connected to a quick coupler having a rotatable pin lock member that is unlocked to allow the lower pin to be pulled out of the lower engaging recess by rotation,
An airframe having a rotation restricting member for restricting the rotation of the pin lock member and maintaining the pin lock member in the locked state;
A farm working machine, comprising: a work body provided on the machine body for performing farm work. The agricultural working machine according to claim 1, wherein the rotation restricting member is a lynch pin that is detachably attached to a pin attaching portion of the machine body.

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