JPH0210861Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a support structure for an operating lever used for shifting gears and the like.

[Conventional technology]

For example, in a vehicle such as a tractor, an operating lever that projects laterally is provided on the upper side of the handle post that supports the handle, and this operating lever is used to perform gear changes and other operations. This has already been proposed in No. 178965/1982, etc., and is structured as follows.

That is, in FIGS. 3 to 5, reference numeral 1 denotes a tractor body, which includes a transmission case 2, an engine, etc. as a structure, and has a pair of left and right front wheels 3 and rear wheels 4. Reference numeral 5 denotes a bonnet that covers the engine and the like at the front of the tractor body 1. Reference numeral 6 denotes steps, which are provided on both sides of the tractor body 1. 7 is a hydraulic system for lifting and lowering the working machine, and 8 is a seat for driving provided above the hydraulic system. Reference numeral 9 denotes a handle for steering the front wheels 3, which is provided at the upper end of a handle shaft 10, and the handle shaft 10 is rotatably supported by a handle post 11 provided on the tractor body 1 behind the bonnet 5. .

A forward/reverse switching lever 12, a main shift lever 13, and an accelerator lever 14 are provided on the upper side portion of the handle post 11 so as to project laterally, and a cover 15 is provided on the base side of each of these levers 12, 13, and 14. and the handle post 1 by the operation panel 16.
Covered with 1. The reverse switching lever 12 is fixed to the upper end of an operating shaft 18 for forward/reverse switching that is supported parallel to the handle post 11 by a pair of upper and lower brackets 17 attached to the handle post 11, and is attached to the side of the operating panel 16. When the switching lever 12 is operated back and forth around the operating shaft 18, the forward/reverse switching device (not shown) inside the mission case 2 is moved to the neutral position. It is designed to switch from forward to forward and backward.

The main shift lever 13 has a fork 20 at its base,
The forked portion 20 is pivotally supported by support shafts 23 and 24 at the upper ends of a speed change operation shaft 21 and a support bracket 22. In addition, the operating shaft 21 is the handle post 11
It is supported vertically and rotatably by an upper fixed member 25 and a lower fixed member (not shown), and is configured such that its vertical movement performs a selection operation, and its rotation around its axis performs a speed change operation. A main transmission (not shown) inside the transmission case 2 can be operated by a combination of these operations. Support bracket 22
is attached to a U-shaped rotating member 26, and the rotating member 26 is rotatable around the operating shaft 21 and is immovable by sandwiching the cylindrical fixing member 25 between a pair of protrusions 27. regulated. The main shift lever 13 projects laterally from an opening 28 in the side of the operation panel 16. A protruding indicating member 29 is attached to the forked portion 20 . On the other hand, an H-shaped guide groove 30 is formed on the top surface of the operation panel 16 in accordance with the operation pattern of the main shift lever 13, and a display indicating the shift position from 1st to 4th gear is formed at each end of the groove 30. A section has been established.

[Problem that the invention attempts to solve]

In this case, when the main shift lever 13 is operated up and down around the pin 24, the operating shaft 21 moves up and down to perform a selection operation, and when the main shift lever 13 is operated back and forth from that up and down position, the operating shaft 21 moves around the axis. However, with this structure, there was a problem in the durability of the support portion of the main shift lever 13.

That is, the pair of protrusions 2 of the U-shaped rotating member 26
7 sandwich the fixed member 25, when the main shift lever 13 is operated up and down around the support shaft 24, the pair of protrusions 27 of the rotating member 26 may expand vertically, and the protrusions Since an external force acts on the contact portion between the portion 27 and the operating shaft 21 inserted therein, there is a drawback that the contact portion is subject to significant wear. If play occurs in the rotating member 26 due to wear, this will cause new twisting, etc., and the vertical sliding performance of the operating shaft 21 will deteriorate, making it difficult to operate the main shift lever 13. It becomes very heavy and difficult.

As a solution to this problem, especially to prevent strain on the vertical sliding of the operating shaft 21, as shown in FIG. Both upper and lower ends of the rotating member 25 may be fitted into the respective projections 27 of the rotating member 26 so that the operating shaft 21 and the rotating member 26 do not come into direct contact with each other.

However, in this case, it is necessary to fix the fixing member 25 to the bracket 31 on the handle post 11 side by welding or the like after passing it through the rotating member 26, so the workability during assembly is extremely poor. It is impossible to disassemble and maintenance is difficult.

[Means for solving problems]

The purpose of the present invention is to solve these conventional problems, and as a specific means for that purpose, the fixed member is made to be rotatable around an axis and slidable in the axial direction. An operating shaft inserted into and supported by the
A U-shaped rotating member rotatably supported by the operating shaft and regulated so as not to move in the axial direction by a fixing member; a support bracket fixed to the rotating member; and an operating lever that is pivotally supported by a support shaft substantially perpendicular to the support bracket, and an operating lever that is pivoted to the support bracket by a support shaft that is substantially parallel to the support shaft, the rotary member being mounted on both sides in the axial direction of the operating shaft. A pair of fixing members are provided to sandwich the
A reinforcing cylindrical body is provided between the pair of protrusions of the rotating member so as to fit around the operating shaft.

[Effect]

When the main shift lever 13 is operated up and down using the support shaft 24 as a fulcrum, the operation shaft 21 moves up and down in the axial direction. Furthermore, when the main shift lever 13 is operated in the front-back direction, the operating shaft 21 rotates because the rotating member 26 is rotatable around the operating shaft 21.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the embodiment shown in FIGS. 1 and 2. A pair of plate-shaped fixing members 32 are vertically provided at a predetermined interval on the handle post 11, and an operating shaft is provided in the hole 33 of the plate-shaped fixing member 32. 21 is inserted and supported. The U-shaped rotating member 26 is sandwiched between the pair of fixing members 32 such that both upper and lower end surfaces thereof are in contact with the pair of fixing members 32 . A reinforcing cylinder 35 is interposed between the pair of protrusions 27 of the rotating member 26 so as to fit around the operating shaft 21 inserted through the hole 34, and is fixed to the protrusions 27 by welding. There is. The inner diameter of the cylinder 35 is smaller than the diameter of the hole 34, so that the rotating member 26 does not come into direct contact with the operating shaft 21. Note that these may have the same diameter.

In the above structure as well, the operation procedure of the main shift lever 13 is the same as the conventional one, but the durability is significantly improved and the operation is light and easy.

That is, the U-shaped rotating member 26 is sandwiched between a pair of fixed members 32, and the fixed members 32 restrict movement of the operating shaft 21 in the axial direction.
Even when the main shift lever 13 is operated in the vertical direction around the support shaft 24, the rotating member 26 does not rattle vertically. Further, the rotating member 26 is connected to a pair of fixed members 32.
and its pair of protrusions 2
Since the reinforcing cylindrical body 35 is provided between the two protrusions 27, the pair of protrusions 27 will not deform and become wider or narrower. Therefore, in conjunction with the above effects, the posture of the rotating member 26 becomes extremely stable, and a decrease in durability due to wear or an increase in operating resistance due to twisting can be prevented. Also, cylinder body 3
By making the inner diameter of 5 the same as or smaller than that of the hole 34 of the protrusion 27, the inner diameter of the cylindrical body 35 and the operating shaft 21 can be
Since they are in contact with each other, it is possible to prevent jamming between the rotary member 26 and the operating shaft 21 caused by the inclination of the rotary member 26, and moreover, almost all wear on the rotary member 26 side can be prevented.

Although the embodiment has been described with respect to the main shift lever 13, the present invention is not limited thereto, and the present invention can be implemented in the same manner with other operation levers in general.

Further, the fixing member 32 may have a shape other than a plate shape.

〔effect〕

As detailed in the embodiments above, according to the present invention,
A pair of fixed members are provided to sandwich the rotating member from both sides in the axial direction of the operating shaft, and a reinforcing cylinder is provided between the pair of protrusions of the fixed member so as to fit around the operating shaft. It is possible to prevent wear of the moving parts and the accompanying rattling, thereby improving durability and making operations easier, as well as easier to assemble and disassemble.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is an enlarged sectional view of the main part, Fig. 3 is a side view of the entire conventional example, and Fig. 4 is a sectional rear view of the main part.
FIG. 5 is a sectional plan view of the same, and FIG. 6 is a sectional view showing a comparative example. 13...Main gear shift lever, 21...Operation shaft, 22
...Support bracket, 26...Rotating member, 27...
...Protrusion part, 32... Fixing member, 35... Reinforcement cylinder.

Claims (1)

[Scope of utility model registration request] An operating shaft 21 is inserted into and supported by a fixed member 32 so as to be rotatable around the axis and slidable in the axial direction, and an operating shaft 21 is rotatably supported by the operating shaft 21 and is supported in the axial direction by the fixed member 32. A U-shaped rotating member 26 that is regulated to be immovable, a support bracket 22 fixed to the rotating member 26, and a support bracket 23 that is pivotally supported by the operating shaft 21 in a direction substantially perpendicular thereto. In the support bracket 22, the operating lever 13 is pivotally supported by a supporting shaft 24 substantially parallel to the supporting shaft 23, and the rotating member 26 is connected to the operating shaft 21.
A pair of fixing members 32 are provided so as to be sandwiched from both sides in the axial direction, and between the pair of protrusions 27 of the rotating member 26,
A support structure for an operating lever, characterized in that a reinforcing cylindrical body 35 is provided so as to fit around the operating shaft 21.