JP2007286940A - Operating lever guiding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a guiding device for an operating lever which allows users to reliably stop the operating lever at an operation limit position while preventing a lever guide from breakage. <P>SOLUTION: The operating lever guiding device is provided with stopper bolts 43 that come into contact with a lever arm 30, which is integral with an HST lever 18 and has an L-shaped vertical cross section, at a swing limit position of the lever 18 to prevent the lever 18, which swings back and forth of a body, from swinging around a swing center shaft 35 on the base of the HST lever 18 beyond its swing limit, and that can adjust swing limit positions of the lever 18. A bolt mounting stay 41 with the stopper bolts 43 mounted is placed in cross direction on the top of a tube section 34a of a tubular stay 34 supported by a travel frame 2a of the body 2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an operation lever for a traveling vehicle, and more particularly to an operation guide device for an operation lever.

The combine increases the ground contact area of the infinite crawlers that make up the crawler, enabling it to run freely even in soft fields such as paddy fields and to perform farming operations such as mowing.
Various operation levers such as a shift lever, a steering lever, and a harvesting lever are arranged on the cab where the combine cockpit is located. These operation levers are configured such that the operator holds the handle at the tip of the lever and swings around the rotation shaft on the lever base side. The operating lever moves within a slit-shaped lever guide provided on the lever panel, but a stopper is provided at the end of the lever guide to restrict the swing range of the operating lever.
JP 2004-106633 A

In the invention described in Patent Document 1, since the stopper at the end of the lever guide is made of sheet metal, the stopper may be damaged if the operation lever is operated strongly. If the operating lever is operated strongly with the stopper at the end of the lever guide being damaged, the operating lever itself or the link mechanism of the operating lever will bend. For example, if it is a shift lever, the neutral position will shift.
Accordingly, an object of the present invention is to provide a guide device for an operation lever that can reliably stop the operation lever at an operation limit position while preventing damage to the lever guide.

The above-mentioned problem of the present invention is solved by the following solution means.
According to the first aspect of the present invention, there is provided a lever arm (30) integrated with the operating lever (18) provided at the center of swinging of the operating lever (18) attached to the body (2) and swung, and the lever An operation in which regulating members (41, 43) that contact the lever arm (30) at the swing limit position of (18) and can adjust the swing limit position of the lever (18) are provided on the body (2) side. It is a lever guide device.

  According to the second aspect of the present invention, the restricting member (41, 43) capable of adjusting the swing limit position of the operation lever (18) attached to the airframe (2) is supported and fixed to the airframe (2). The operation lever guide device according to claim 1, which is attached to the control lever.

  According to a third aspect of the present invention, there is provided a regulating member (41, 43) capable of adjusting a swing limit position of the operation lever (18) within a swing locus range of a lever arm (30) integrated with the operation lever (18). The operation lever guide device according to claim 1, wherein the operation lever guide device is disposed in a housed manner.

  According to the first aspect of the present invention, the end of the operation lever guide provided on the operation panel is not damaged by the operation lever (18), and deformation of the swinging portion of the operation lever (18) can be prevented. The operation setting position of the operation lever (18) (neutral position in the case of a shift lever) is eliminated.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the regulating member (41, 43) is attached to the stay (34) having high strength and rigidity attached to the airframe (2). Therefore, the position of the regulating member (41, 43) whose mounting position has been adjusted once is not displaced, and stable operation can be performed.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, the swinging locus of the lever arm (30) in which the regulating member (41, 43) supports the operation lever (18) is further provided. Since it is arrange | positioned in the inside, a control member (41, 43) does not become obstructive at the time of maintenance of other components.

1 is a left side view of the combine of this embodiment, FIG. 2 is a right side view of the combine of FIG. 1, and FIG. 3 is a plan view of the combine of FIG. In the present specification, the left side and the right side refer to directions when the combine is directed in the forward direction.
As shown in FIGS. 1 to 3, a pair of left and right traveling devices (hereinafter referred to as traveling crawlers) 3 that travel on the soil surface are disposed on the lower side of the combine body 2 (traveling frame 2 a), and the traveling is performed. Engine power is transmitted to the crawler 3 via the drive wheels 4. On the front end side of the machine body 2, a cutting device 6 having a weed pod 5 is provided. Since the reaping device 6 is supported by the reaping device support frame 7 that moves up and down around the fulcrum above the airframe 2, an operator who has boarded the combine is provided with a power steering provided in front of the handlebar 21 near the cockpit 9. The lever (steering lever) 10 is tilted up and down to move up and down together with the reaping device support frame 7.

  Above the machine body 2, a threshing device 11 that transports the cereals conveyed from the reaping device 6 to thresh and select and a grain tank 13 that temporarily stores the grains threshed and selected by the threshing device 11 are placed. An auger composed of a vertical auger 14 and a horizontal auger 15 is connected to the rear part of the Glen tank 13, and the grains in the Glen tank 13 are conveyed by a spiral (not shown) at the lower part of the Glen tank. It is set as the structure discharged | emitted from the grain discharge port 15c to the exterior of a combine.

  A power steering lever 10 for raising and lowering the harvesting device 9 and a turning operation of the combine can be controlled in front of the cockpit 9 of the combine having the above-described configuration, and the traveling device 3 can be advanced, stopped, and retracted steplessly on the left side. HST operation lever (main transmission lever) 18 and auxiliary transmission lever for switching the speed of the traveling device 3 to three speed stages such as low speed (work speed), medium speed (work speed and travel speed), and high speed (travel speed). 19. A mowing lever 22 and a threshing lever 23 for operating the mowing device 9 and the threshing device 11 to stop operation, a cocoon discharge lever 16, an auger lever 17, an accelerator lever 20, and the like are provided.

  FIG. 4 shows an external perspective view of a configuration including an HST case 18 having an HST lever 18, an HST case 25 having an HST operated by the lever 18, and a transmission case 26 having a meshing transmission. Moreover, the side view which looked at these from the side direction of the combine is shown in FIG. 5, the principal part enlarged view of FIG. 5 is shown in FIG. 6, and the principal part front view seen from the front direction of the combine is respectively shown in FIG.

  A clutch frame 27 whose horizontal cross section is L-shaped is provided at the base of the HST lever 18, and the clutch frame 27 is fixed to the mission case 26 via a support frame 29. A lever arm 30 having an L-shaped vertical section is attached to the base of the HST lever 18, and both ends of a rod 33 connecting the lever arm 30 and the trunnion arm 31 of the HST are respectively connected to the lever arm 30 and the lever arm 30. The trunnion arm 31 is rotatably attached.

  The lever arm 30 is centered on a shaft center 35 a of a support shaft 35 spanned between a tube-like stay 34 erected on the traveling frame 2 a of the machine body 2 and the clutch frame 27. The tubular stay 34 includes a tube 34 a erected on the traveling frame 2 a of the machine body 2 and a flat plate 34 b provided above the top of the tube 34 a, and a support shaft 35 is hung between the flat plate 34 b and the clutch frame 27. Has been passed. The support shaft 35 is provided with a brake shoe 37, and a lever arm 30 is sandwiched between the flat plate 34b and the clutch frame 27 between the left and right outer sides and the brake shoe 37 sandwiched between the iron plates 38. Therefore, the lever arm 30 is tightened with the predetermined torque of the brake shoe 37 to prevent the shift lever 18 integral with the lever arm 30 from wobbling.

  Further, the drive wheel 4 of the traveling crawler 3 is provided on a drive shaft 50 that protrudes left and right from the mission case 26. Further, power is transmitted from the transmission case 26 to the cutting input pulley 39a of the cutting input shaft 39 of the cutting clutch C1, and the cutting input shaft 39 is provided to project to the side of the rotating body 51 of the cutting device 6, and the cutting input shaft A cutting input pulley 39a is detachably attached to 39.

  In order to restrict the movement of the HST lever 18 when the transmission lever 18 swings in the direction of arrow A about the support shaft 35 as a rotation center, a bent bolt mounting stay 41 is bent at the top of the tube portion 34a of the tube stay 34. The plane is perpendicular to the plane of the lever arm 30, and a bolt mounting screw portion (not shown) is provided on each bending plane of the plane of the bolt mounting stay 41. Stopper bolts 43a and 43b are attached to the threaded portions, and the heights of the bolts 43a and 43b are adjusted with nuts 44a and 44b so that the tops of the stopper bolts 43a and 43b abut against the horizontal plane 30a of the lever arm 30. To do.

  As shown in FIG. 6, when the HST lever 18 is rotated backward when the vehicle moves forward, the top 30 a of the forward stopper bolt 43 a attached to the bolt attachment stay 41 faces the horizontal direction of the lever arm 30. To prevent the HST lever 18 from further swinging, and when the HST lever 18 is rotated forward when the vehicle is moving backward, the top of the reverse stopper bolt 43b attached to the bolt mounting stay 41 is Further contact with the flat surface 30a of the lever arm 30 restricts further swinging of the HST lever 18.

  Thus, the end of the lever guide (not shown) of the operation panel provided adjacent to the cockpit 9 can be prevented from being damaged by the HST lever 18, and deformation of the rotating portion of the HST lever 18 can be prevented. The neutral position is no longer confused.

  In addition, since the bolt mounting stay 41 is attached to the tube stay 34 that has high strength and is rigid on the traveling frame 2a, the position of the stopper bolt 43 that has been adjusted once is not displaced, and stable operation can be performed.

  Furthermore, when the bolt mounting stay 41 that supports the stopper bolt 43 is viewed from the side of the machine body, the bolt mounting stay 41 is placed in the swing locus of the lever arm 30 that supports the HST lever 18. Therefore, the stopper bolt 43 and the bolt mounting stay 41 do not get in the way during the adjustment and maintenance of the rod 33 that connects the HST lever 18 and the HST trunnion arm 31.

  Although not shown, on the inner surface of the side cover (not shown) of the operation panel on which the HST lever 18 and the like adjacent to the cockpit 9 are arranged, the side cover of the lever arm 30 to which the HST lever 18 is attached upward A stopper bolt 43 is provided on the side. Therefore, since the stopper bolt installation portion is protected by the side cover during normal work, there is no problem such as a finger being caught by an operator, and safety is ensured. Further, when the side cover is removed, the stopper bolt 43 is provided on the front side of the lever arm 30, so that the maintenance is easy.

  Further, since the bolt mounting stay 41 that supports the stopper bolt 43 is attached to the top of the tube portion 34a of the tubular stay 34 so that the arm extends in the front-rear direction of the vehicle, it extends from the tubular stay 34 in the front-rear direction. The overhang amount of the bolt mounting stay 41 is small, the bolt mounting stay 41 is not deformed, can be configured with a relatively thin member, and the cost is reduced.

  Further, as shown in FIG. 6, the bolt mounting stay length L1 from the mounting portion of the bolt mounting stay 41 to the tubular stay 34 to the mounting portion of the forward-side bolt 43a and the mounting stay length of the reverse-side bolt 43b The length L2 is configured to satisfy L2> L1. In this way, when the operator operates the HST lever 18, it is ergonomically said that the force to operate forward is greater than the force to operate backward. By determining the lengths L2 and L1, even the relatively thin bolt mounting stay 41 is not deformed, and the cost is reduced.

FIG. 8 is a plan view of the operation panel portion in which the guide groove of the HST lever 18 is provided.
The length C of the guide groove 36c for releasing the parking brake by the HST shift lever 18 is set to the length A of the guide groove 36a for moving the lever 18 from the neutral position to the forward position and the position for moving from the neutral position to the reverse position. It is shorter than the length B of the guide groove 36b. This reduces the stroke of the HST speed change lever 18 when the parking brake is released, and improves operability.
In addition, since the neutral position width D and the parking groove release guide groove width E are approximately the same size, the parking brake can be released only at the neutral position, so the parking brake is reliably released at the neutral position. it can.

  On the other hand, the plane 30a of the lower part of the lever arm 30 that supports the HST lever 18 is bent in an L shape so that the stopper bolt 43 hits this part. The plane 30a of the lever arm 30 When the HST lever 18 is moved to the position indicated by the shaded circle of the lever guide shown in FIG. 8 to attach an easy shift release wire (not shown) for releasing the parking brake. Since it is bent in an L shape and is used as an abutting member for the stopper bolt 43 by utilizing a portion for achieving other functions, the structure is advantageous in terms of cost.

  In this way, the shape of the lever arm 30 for achieving other functions can be used as it is, and since it is bent in an L shape, this portion is strong in strength and does not deform even when it hits the stopper bolt 43. By bending the arm 30 into an L shape, the contact surface with the stopper bolt 43 can be increased, the surface pressure of the interference portion can be reduced, and the wear of the interference portion is reduced, enabling stable operation. .

  In addition, since a support shaft 35 that serves as a pivot for the HST lever 18 is attached to the vertical flat plate portion 34b of the upper portion of the tube 34a of the tube-like stay 34, the bolt mounting stay 41 is attached to the top of the tube 34a. The positional relationship between the lever arm 30 of the HST lever 18 and the stopper bolt 43 is not shifted, and the bolt mounting stay 41 is not deformed and the threaded portion of the stopper bolt 43 is not damaged. Therefore, it can be adjusted without any problems during adjustment.

  Further, since the bolt mounting stay 41 is attached so that the arm is extended in the front-rear direction with respect to the tubular stay 34, and a gap is provided between the tubular stay 34 and the stopper bolt 43, the stopper bolt 43 and the lock nut 44 are provided. Can be adjusted easily.

  The present invention can be applied to a guide device for an operation lever such as a combine.

It is the whole combine left side view of the combine provided with the operation lever guide apparatus of one Example of this invention. FIG. 2 is an overall right side view of the combine of FIG. 1. It is a whole top view of the combine of FIG. FIG. 2 is an external perspective view of a configuration including an HST case in which the HST lever of the combine shown in FIG. It is the side view which looked at the part of Drawing 4 from the side of a combine. It is a principal part enlarged view of FIG. It is the principal part front view which looked at the part of FIG. 4 from the front direction of the combine. It is a top view of the operation panel part of the combine of FIG.

Explanation of symbols

2 Airframe 2a Traveling frame 3 Traveling crawler 4 Driving wheel 5 Weeding cutter 6 Mowing device 7 Mowing device support frame 9 Pilot seat 10 Power steering lever 11 Threshing device 13 Glen tank 14 Vertical auger 15 Horizontal auger 16 籾 Discharging lever 17 Auger lever 18 HST Lever 19 Sub-shift lever 20 Accelerator lever 21 Handle bar 22 Harvesting lever 23 Threshing lever 25 HST case 26 Mission case 27 Clutch frame 29 Support frame 30 Lever arm 30a Lever arm flat surface portion 31 Trunnion arm 33 Rod 34 Tube-like stay 34a Tube 34b Flat plate 35 Support shaft 35a Rotating support point 36a, 36b, 36c Guide groove 37 Brake shoe 38 Iron plate 39 Cutting input shaft 39a Pulley 41 Bolt mounting stay 43 (43a, 43b) Stop Bolts 44 (44a, 44b) the nut 50 the drive shaft 51 rotation body C1 Reaper clutch

Claims (3)

  A lever arm (30) integrated with the operating lever (18) provided at the center of swinging of the base of the operating lever (18) which is attached to the body (2) and swings, and a swing limit position of the lever (18) The control lever guide device is characterized in that a regulating member (41, 43) that abuts on the lever arm (30) and can adjust the swing limit position of the lever (18) is provided on the machine body (2) side. .   The regulating members (41, 43) capable of adjusting the swing limit position of the operation lever (18) attached to the airframe (2) are attached to a stay (34) supported and fixed to the airframe (2). The operating lever guide device according to claim 1.   The operating lever guide device according to claim 1 or 2, wherein the regulating member (41, 43) is disposed within a swing locus range of a lever arm (30) integrated with the operating lever (18).

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