JPH04128923U - Speed control device for mobile agricultural machinery - Google Patents

Abstract

(57) [Summary] [Purpose] To make the clutch operation easier by making the clutch engagement/disengagement operation within a range that does not exceed the dead point line. [Structure] The clutch lever 16 provided on the operating handle 13 is moved against the pulling force of the operating wire 53, and the operating wire 5
3D. P. By rotating in one direction within a range not exceeding L, D. P. The clutch lever 16 can be rotated with a relatively small rotational force without applying the maximum load due to the operation wire 53 at the L position. Also,
The blocking state of the tensile force of the operating wire 53 is released by rotating the hand lever 23 or the clutch lever 16 itself in a direction substantially perpendicular to the rotating direction of the clutch lever 16. Since no force is applied to prevent the rotation of the hand lever 23 or the clutch lever 16 itself due to the tensile force of the operating wire 53, the hand lever 23 can be rotated with a relatively small rotational force.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

In this invention, after turning on the clutch by operating the clutch lever or Mobile farming where the clutch is turned off by operating the clutch lever or hand lever This invention relates to a gear shift operating device for an airplane.

0002

[Conventional technology]

For mobile agricultural machinery such as tillers, in order to make turning movements etc. easier, it is necessary to It is important to switch between channels smoothly, and many improvements have been made in this regard. It is being emitted.

0003 As an example of such a mobile agricultural machine, for example, Japanese Patent Laid-Open No. 64-32932 discloses the one shown in FIG. An engine 2 is mounted on the top of a frame 1 of the mobile agricultural machine shown in the figure. Also, on its side, there is a mission case 4 that rotatably supports a pair of left and right wheels 3. installed.

0004 A pulley 6 attached to the output shaft 5 of the engine 2 and a transmission case 4 A belt 9 is stretched between the pulley 8 attached to the input shaft 7 of the There is. Below the belt 9, there is a tensioner at the tip for applying tension to the belt 9. A tension arm 11 having a tension roller 10 is rotatably arranged. Te The tension arm 11 is urged away from the belt 9 by a spring 11a. ing. A main clutch 12 is provided inside the tension arm 11.

[0005] Above the mission case 4, there are a pair of operation handles extending diagonally upward at the rear. Dollar 13 is placed. A grip 14 is provided at the end of each operating handle 13. It is being Below each grip 14, as shown in FIG. A clutch lever 15a is provided. And each side clutch lever 15 Power is transmitted from the engine 2 to the left and right wheels 3 by individually operating is intermittent, and this causes the aircraft to rotate.

[0006] Further, a support frame 15 is attached near the grip 14 on the right side. A clutch lever 16 is rotatably attached to this support frame 15. . A connecting piece 17 is attached to the end of the clutch lever 16. Connecting piece 17 An arc-shaped connecting member 18 is attached to the end portion of the connecting member 18 . End of arc-shaped connecting member 18 An operating wire 19 connected to the tension arm 11 is attached to the section. .

[0007] The operating wire 19 is then pulled by the spring 11a on the tension arm 11 side. When turning the clutch lever 16 from the OFF position to the ON position, The connection part A between the connection piece 17 and the arcuate connection member 18 is the dead point line (hereinafter referred to as , simply D. P. (referred to as L), the operating wire 19 is connected to the clutch lever 16. A rotational force toward the front is applied due to the tensile force. Also, D. P. slightly over L In the position where the connecting piece 17 comes into contact with the stopper 24, its movement is restricted. be done.

[0008] An engagement pin 20 is provided in a protruding manner at an intermediate portion of the connecting piece 17 . to the engagement pin 20 is engaged with the U groove 22 of the rocking member 21. At the end of the swinging member 21, there is a handle. A lever 23 is attached. The hand lever 23 is in the state where the grip 14 is held It is arranged in a position where it can be operated with The engaging portion between the U groove 22 and the engaging pin 20 is the D. P. Beyond L It is possible to rotate in forward and reverse directions within a certain range.

[0009] When the clutch lever 16 is in the ON position, the hand lever 23 is also in the ON position. position, and while holding the grip 14, use your thumb to turn the hand lever 23 to the OFF position. When pushed up to the side, the clutch lever 16 is returned to the OFF position. Also, at hand By adjusting the amount of return when returning the lever 23 to the OFF position, the clutch You can also get the status.

0010

[Problem that the idea aims to solve]

By the way, the clutch operation of the clutch lever 16 in the above-mentioned conventional mobile agricultural machine is When rotating the clutch lever 16 from the OFF position to the ON position, The rotational force by the operating wire 19 is applied to the clutch lever 16 by the D. P. When it exceeds L It can be added. Therefore, by rotating the hand lever 23, the clutch When turning on D. P. Since the maximum load is applied by the operating wire 19 at L, When lowering the hand lever 23, a large rotational force is applied.

[0011] Similarly, when disengaging the clutch, D. P. Connect operation wire 19 at L. The maximum load due to the rotation is applied in the direction that prevents rotation, so the requires a large turning force. For this reason, the hand lever 23 is inserted from below the grip 14. Since lifting operations are required, quick clutch switching operations are required. In some cases, you feel very inconvenienced.

0012 Also, when rotating the clutch lever 16 from the ON position to the OFF position, , the connecting portion A between the connecting piece 17 and the arcuate connecting member 18 is D. P. beyond L Therefore, the tensile force of the operating wire 19 is applied in a direction that prevents rotation toward the OFF position. Therefore, a large turning force is required, and the operability cannot be said to be good.

[0013] The present invention has been developed in response to these circumstances, and is designed to reduce clutch engagement and disengagement. By making it work within a range that does not exceed the dead point line (D.P.L), To provide a speed change operation device for a mobile agricultural machine that allows clutch operation to be performed easily. The purpose is to

[0014]

[Means to solve the problem]

In order to achieve the above object, the present invention provides a clutch lever provided on an operating handle. Push the bar or hand lever against the tensile force of the operating wire to prevent the operating wire from becoming dead. By rotating back and forth within a range that does not exceed the point line, the Pull the actuating wire to turn on the clutch, and then turn the clutch lever or the front The operation described above can be performed by operating the hand lever that is operated while holding the grip. The clutch lever or hand lever is rotated and returned to the other direction by the pulling force of the actuating wire. In a speed change operation device for a mobile agricultural machine, the clutch lever is turned off to disengage the clutch. -or the clutch lever or the hand lever is rotated in the opposite direction as the hand lever rotates. an interlocking member that rotates in the direction, and an interlocking member that is provided on the end side of the hand lever and that rotates the clutch. When the tilter or hand lever rotates back and forth and reaches the clutch ON position, A tensile force blocker that prevents the tensile force of the operating wire to maintain the clutch ON position. member and the clutch lever or hand lever in the front-rear direction and left-right direction, respectively. a rotating member for rotating the clutch lever or the hand lever; By rotating the member in the left and right direction, the tension caused by the tension blocking member is reduced. The clutch is characterized in that the force blocking state is released and the clutch is rotated back to the OFF position. do.

[0015]

[Effect]

In the speed change operation device for a mobile agricultural machine of the present invention, for example, a crank provided on the operation handle Push the latch lever against the pulling force of the operating wire, and move it to the dead point line of the operating wire. The operating wire can be pulled in by rotating it back and forth within a range that does not exceed This allows the clutch to be turned on. Therefore, the operation wire should be operated within the range that does not exceed the dead point line. Therefore, the maximum load due to the operating wire at the dead point line may be applied. Therefore, the clutch lever can be rotated with a relatively small rotational force. To release the tensile force blocking state by the tensile force blocking member, for example, use the hand lever. This is done by rotating the clutch lever in a direction approximately perpendicular to the direction of rotation. Therefore, when releasing it, the rotation of the hand lever due to the pulling force of the operating wire is prevented. Since no force is applied to rotate the hand lever, it is possible to rotate the hand lever with a relatively small rotational force. I can do that. Furthermore, the rotation of the clutch lever itself is the same as the rotation of the hand lever. In this way, the state in which the tensile force is blocked by the operation wire can be released using a relatively small turning force. You can do this.

[0016]

【Example】

Hereinafter, one embodiment of the present invention will be described in detail based on the accompanying drawings. In addition, the following In the figures explained below, parts common to Figures 7 and 8 are designated by the same reference numerals and overlapped. Omit the explanation.

[0017] Figures 1 and 2 show an embodiment of the speed change operation device for mobile agricultural machinery of the present invention. Ru. As shown in these figures, the grip 14 on the right side of the speed change operating device of the mobile agricultural machine is A support plate 31 having a support shaft 30 is attached to the nearby operation handle 13. Ru. A support boss 32 is attached to the support shaft 30.

[0018] A support member 33 for supporting the clutch lever 16 is attached to the support boss 32. I'm being kicked. Inside the support member 33, a U-shaped metal fitting 34 is attached to the side surface of the support boss 32. The support member 33 is pivotally supported by the locking pin 35. Ru. Moreover, between the U-shaped metal fitting 34 and the support member 33, a locking pin 35 is wound. Both free ends of the torque spring 36 are locked, and the support boss 32 and The support member 33 is urged.

[0019] Further, a cam plate 37 is attached to the support plate 31 with screws 38, 38. Ru. The cam plate 37 is provided with a stop panel for regulating the movement of the connecting plate body 48, which will be described later. 39 is attached.

[0020] Furthermore, a cylindrical body 41 that pivotally supports a horizontal shaft 40 is attached to the support plate 31. beside A hinge 42 is attached to the tip of the shaft 40, as shown in FIG. hin The hinge 42 includes a hinge member 42A having an insertion hole 42a and a fitting groove 42b. It is. The hinge 42 also has an insertion hole 42c and is fitted into the fitting groove 42b. A hinge portion having a fitting piece 42d and an insertion hole 42e into which the hand lever 23 is inserted. A material 42B is provided. Then, the insertion hole 42a and the insertion hole 4 of the fitting piece 42d By inserting the locking pin 43 into 2c, the hinge part from the hinge member 42A Separation of the material 42B is prevented. In addition, the hinge member 42A rotates as the horizontal shaft 40 rotates. The hinge member 42B is rotatable in the same direction through the fitting piece 42d. It can be rotated horizontally.

[0021] The end side of the hand lever 23 is inserted into the insertion hole 42e of the hinge member 42B. There is. The hand lever 23 is moved by a spring 44 attached to a locking pin 43. It is always biased in the direction of the arrow (see FIG. 2). At the tip of the hand lever 23, there is a connecting plate 47 having a long hole 45 and an engaging part 46. installed. A connecting plate 48 fixed to the support boss 32 is inserted into the elongated hole 45. The tip of the idle pin 49 is engaged. The guide pin 49 moves within the elongated hole 45. It is considered possible.

[0022] A protruding portion 50 is provided on one side of the connecting plate 48 in a protruding manner. Tip of protrusion 50 One end portion 51B of a U-shaped connecting arm 51 is rotatably attached to the portion. Ru. A fitting portion 52 is provided at the other end of the connecting arm 51. 2 is fitted with a connecting fitting 54 attached to the end of the operating wire 53. So The connecting fitting 54 is then locked to the fitting part 52 via the locking pin 55. ing.

[0023] Next, the operation of the speed change operation device for a mobile agricultural machine having such a configuration will be further explained with reference to FIGS. 4 to 6. Explain using. First, turn the clutch lever 16 from the OFF state side in FIG. 1 to the ON state side in FIG. When the support boss 32 is rotated counterclockwise, the connecting plate 48 moves upward. Moving. As a result, one end 51B of the connecting arm 51 moves upward to the right. Therefore, the connecting arm 51 is pulled to the right in FIG. Along with this, the operation wire 53 pulled in the same direction. Then, the tension arm 11 shown in FIG. 7 rotates, and the tension arm 11 shown in FIG. A tension roller 10 contacts the belt 9 to apply tension.

[0024] At this time, the connecting plate body 48 rotates counterclockwise around the support boss 32. Accordingly, the guide pin 49 is displaced upward to the right. As a result, the guide pin 49 is connected. While moving within the elongated hole 45 of the connecting plate 47, the connecting plate 47 is pushed up. This guide pin Due to the pushing up force of 49, the hand lever 23 is moved through the hinge member 42A of the hinge 42. and rotate in the direction of arrow a. One end 51B of the connecting arm 51 is D. P. Lower side of L When it reaches the vicinity, the engaging portion 46 of the connecting plate 47 engages with the edge 37A of the cam plate 37. . This prevents the connecting arm 51 from moving due to the tensile force of the operating wire 53. Therefore, rotation of the clutch lever 16 from the ON position to the OFF position is prevented.

[0025] In response, the clutch lever 16 that is in the ON position (see Figure 4) is moved to the OFF position. To return it, hold the grip 14 and grip the end 23A of the hand lever 23. Push it into the top 14 side. This causes the hinge member 42B of the hinge 42 to move in the horizontal direction. , the end 23A of the hand lever 23 is horizontal with the hinge 42 as a fulcrum. rotate in the direction. This rotation causes the link attached to the end of the hand lever 23 to The engaging portion 46 of the connecting plate 47 comes off from the edge 37A of the cam plate 37. Edge of cam plate 37 By removing the engaging portion 46 of the connecting plate 47 from 37A, the operating wire 53 is pulled. Since the movement of the connecting arm 51 due to tension is released, the connecting arm 51 cannot be operated. It is pulled back by the tensile force of the wire 53. On the other hand, operate the clutch lever 16 itself to move the clutch lever 16 to the OFF position. To return the clutch lever 16 to the locking pin 35, as shown in FIG. Rotate the point to the left in the figure. This allows it to be attached to the U-shaped bracket 34. Since the support boss 32 moves to the left in the figure along the support shaft 30, the support boss 3 The engaging portion 46 of the connecting plate 47 connects to the cam plate 3 via the connecting plate 48 attached to the cam plate 2. 7 from the edge 37A.

[0026] Then, as the connecting arm 51 is pulled back, the connecting plate body 48 moves around the support boss 32. When rotated clockwise, the clutch lever 16 is rotated by the rotation of the support boss 32. Accordingly, it rotates toward the OFF position. This causes the clutch to be disconnected. Furthermore, this At this time, the guide pin 49 of the connecting plate 48 is rotated downward to the left, that is, rotated clockwise. Therefore, while the guide pin 49 moves within the elongated hole 45 of the connecting plate 47, Press down. Due to the downward force of this guide pin 49, the hand lever 23 is The hinge member 42 rotates in the direction of arrow b via the hinge member 42A.

[0027] In this way, in this embodiment, the clutch lever 1 provided on the operating handle 13 D. 6 of the operating wire 53 against the tensile force of the operating wire 53. P. Range not exceeding L By rotating in one direction within the enclosure, the operating wire 53 is pulled, thereby It can be clutch-on. For this reason, the operation wire 53 is P. over L D. P. Maximum load due to operating wire 53 at L The clutch lever 16 can be rotated with a relatively small rotational force without applying any weight. can be set.

[0028] In addition, the engaging portion 46 of the connecting plate 47 engages with the edge 37A of the cam plate 37. To release the blocking state of the tensile force of the operating wire 53, move the hand lever 23 to the clutch lever. -16 by rotating it in the left and right direction, which is approximately perpendicular to the direction of rotation. When releasing it, the hand lever 23 is rotated by the tensile force of the operating wire 53. Since no interfering force is applied, the hand lever 23 can be rotated with a relatively small rotational force. can be set. Furthermore, the rotation of the hand lever 23 is also controlled by the rotation operation of the clutch lever 16 itself. Similarly to the operation, the release of the blocking state of the tensile force by the operation wire 53 is performed with a relatively small amount. This can be done using a rotational force.

[0029]

[Effect of the idea]

As explained above, according to the speed change operation device for mobile agricultural machinery of the present invention, the operation hand the clutch lever or hand lever provided on the handle against the pulling force of the operating wire. , rotate in one direction within a range that does not exceed the dead point line of the operating wire. This causes the operating wire to be pulled, which allows the clutch to be engaged. . This allows the operation wire to be operated within the range that does not exceed the dead point line. Therefore, the maximum load due to the operating wire at the dead point line may be applied. Therefore, the clutch lever can be rotated with a relatively small rotational force. In addition, to release the tensile force blocking state by the tensile force blocking member, move the hand lever in the left and right direction. Since this is done by rotating the operation wire to release it, Relatively small rotation because no force is applied that prevents the hand lever from rotating due to tensile force. The hand lever can be rotated by force. Furthermore, the rotation of the clutch lever itself is the same as the rotation of the hand lever. In this way, the state in which the tensile force is blocked by the operation wire can be released using a relatively small turning force. You can do this. As a result, the clutch can be engaged and engaged within a range that does not exceed the dead point line. By doing so, the clutch operation can be performed easily.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of a speed change operating device for a mobile agricultural machine according to the present invention.

FIG. 2 is a plan view of the speed change operating device of the mobile agricultural machine shown in FIG. 1;

FIG. 3 is a perspective view showing a hinge of the speed change operating device of the mobile agricultural machine shown in FIG. 1;

FIG. 4 is a front view for explaining the operation of the speed change operating device of the mobile agricultural machine shown in FIG. 1;

5 is a partially sectional front view for explaining the operation of the speed change operating device of the mobile agricultural machine shown in FIG. 1; FIG.

6 is a partially sectional plan view illustrating the operation of the speed change operating device for the mobile agricultural machine shown in FIG. 1; FIG.

FIG. 7 is a side view showing an example of a conventional mobile agricultural machine.

8 is a front view showing the speed change operating device of the mobile agricultural machine shown in FIG. 7. FIG.

[Explanation of symbols]

13 Operation handle 13 14 Grip 16 Clutch lever 23 Hand lever 32 Support boss 37 Cam plate 42 Hinge 48 Connection plate 51 Connecting arm 53 Operation wire

Claims (1)

[Scope of utility model registration request] Claim 1: By rotating a clutch lever or a hand lever provided on an operating handle in the longitudinal direction against the tensile force of the operating wire within a range that does not exceed the dead point line of the operating wire, By pulling the operating wire to turn on the clutch and operating the clutch lever or the hand lever that is operated while holding the grip, the clutch lever or the hand lever is moved in the other direction by the tensile force of the operating wire. In a speed change operation device for a mobile agricultural machine that turns the clutch off by returning the rotation, an interlocking member that rotates the clutch lever or the hand lever in opposite directions as the clutch lever or the hand lever rotates, and the hand lever a tensile force blocking member provided on an end side of the clutch lever or the hand lever to prevent the tensile force of the operating wire and maintain the clutch ON position when the clutch lever or the hand lever rotates in the front-rear direction and reaches the clutch ON position; and a rotating member that rotates the clutch lever or the hand lever in the front-back direction and the left-right direction, respectively, and by rotating the clutch lever or the hand lever in the left-right direction via the rotating member, A speed change operation device for a mobile agricultural machine, characterized in that the tensile force blocking state by the tensile force blocking member is released and the clutch is rotated back to a clutch OFF position.