JP3390083B2 - Combine handling frame structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handle barrel structure for combine harvesters.

[0002]

2. Description of the Related Art Conventionally, combine harvesters are composed of a mowing section, a threshing section, a traveling section and a sorting section, and a grain culm cut by the mowing section while traveling in the traveling section is removed from the rear end of the mowing section. It is configured to be conveyed to the threshing unit, thresh by rotation of the handling cylinder of the threshing unit, and the threshing grains are sorted by the sorting unit to harvest refined grains.

Such a handling cylinder is constructed such that a flange is fixedly mounted on a handling cylinder handling cylinder support shaft mounted on the front and rear walls of the handling chamber of the threshing section, and front and rear end face plates of the handling cylinder are attached to the flange by bolts. ing.

[0004]

Therefore, when assembling the handling cylinder to the threshing part, it is necessary to bolt it in a narrow gap between the front and rear walls of the handling chamber and the front and rear end face plates of the handling cylinder. Is hard to do, and moreover, there is a gap between the peripheral wall of the threshing section and the handling cylinder,
It was necessary to mount the handle while adjusting the relative positions of the handle teeth of the handle and the accessory members such as cutting blades fixed to the peripheral wall of the threshing part, and this work required a lot of trouble. If the gap or the related position is incorrect, there is a problem that interference between the handling tooth and the cutting edge occurs or threshing performance deteriorates.

Further, the handling cylinder may be removed in order to replace the handling cylinder, clean the inside of the handling room, or perform maintenance, but in this case also, the bolts must be removed and attached in a narrow gap. It was hard to work because it had to be done.

[0006]

According to the present invention, the inner end portions of the front and rear dust-proof wheels attached to the front and rear walls of the handling chamber are formed in the front and rear recesses formed on the front and rear end faces so as to be rotatable about the shaft center. When supporting the handling cylinder in which is fitted between the front and rear walls forming the handling chamber, one of the front and rear dustproof wheels is fixed and the other is removable, and the handling cylinder support shaft is arranged in the axial direction of the handling cylinder. The insertion hole is opened, and the handling cylinder support shaft is shaped so that the relative position does not change so as to transmit the drive in the rotation direction with respect to the insertion hole, and it is inserted freely in the axial direction,
Provided between the front and rear walls of the front and rear walls that pivotally support the handling cylinder support shaft is a front and rear positioning collar that is externally fitted to the handling cylinder support shaft, and fix one of the positioning collars to the same side shaft support and handle the other. An object is to provide a handle barrel structure of a combine, which is slidable / fixable with respect to a barrel support shaft.

Further, a pipe-shaped member is disposed on the axis of the handling cylinder, the pipe-shaped member is located in front and rear end face recesses formed on the front and rear end faces of the handling barrel, and the front and rear end faces of the pipe-shaped member are positioned at the handling cylinder. It is also characterized in that it is flush with the front and rear end faces, and that the positioning collar on the side that supports the thrust load of the handling cylinder is not slidable in the axial direction with respect to the shaft support portion on the same side.

[0008]

The handling cylinder is constructed so that it can be rotated around its axis, and the inner ends of the front and rear dustproof wheels attached to the front and rear walls of the handling chamber are fitted in the front and rear recesses formed in the front and rear end faces. In the frame structure of the handling cylinder supported between the front and rear walls forming
A case where the handling cylinder is slid backward from the handling room to be removed will be described.

That is, since the rear positioning collar fitted in the rear shaft support is slidable in the outward direction, and the rear dustproof wheel is detachable, the rear dustproof wheel is unfixed and left free. , Sliding the handle cylinder and the rear positioning collar in the rear direction releases the front dustproof wheel from fitting into the recess on the front end face of the handlebar, allowing the handlebar to be removed from the handle room by bypassing the front dustproof wheel. . At this time, the recess of the rear end surface of the handling cylinder and the rear dustproof wheel are deeply fitted, but since the wheel is free, it can be taken out from the handling chamber together with the handling cylinder.

When the handling cylinder is mounted in the handling chamber, the front positioning collar is attached at a predetermined position and the rear positioning collar is fitted in the rear shaft support so that the inner end surface of the collar is flush with the inner surface of the rear wall of the handling chamber. The handling cylinder with the rear dustproof wheel fitted in the recess on the rear end face is inserted into the handling chamber, and the handling barrel support shaft is inserted into the pipe-shaped member of the handling barrel from the front through the front positioning collar. To the specified position in the front, slide the rear positioning collar in the forward direction to prevent the handle barrel support shaft from being pulled out of the handle room, and fix the rear dustproof wheel to the rear wall to secure the handle barrel to the handle room. Can be easily attached to the predetermined position. Further, a pipe-shaped member is disposed on the axis of the handling cylinder, the pipe-shaped member is located in front and rear end face recesses formed on the front and rear end faces of the handling barrel, and the front and rear end faces of the pipe-shaped member are front and rear end faces. When the handle is removed, the handle is pushed backward by the rear end of the pipe-shaped member when the handle is removed, so that it is flush with the rear wall of the handle. Since the collar slides, the work becomes easier.

Further, by making the positioning collar between the shaft support portion of the handle barrel on the side supporting the thrust load and the handle barrel support shaft not slidable in the axial direction with respect to the coaxial support portion, the thrust bearing structure is strengthened.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of the present invention will be described. FIG. 1 is an overall side view showing a combine A having a handle barrel structure of the present invention. The combine A is a crawler type traveling unit. A threshing section C and a sorting section D are provided on the left side of the machine body a that can be traveled by B, and a reaping section E is attached to the front of the machine unit so as to be able to move up and down, while a driving section F is arranged on the right front section of the machine body a. Installed in the rear, and the motor part G and the paddy receiving part H behind it.
And a straw processing unit I is provided at the rearmost portion of the machine body a.

The threshing section C, as shown in FIGS. 1 and 2,
A handling room 24 composed of a peripheral wall 23, a front wall 20, a rear wall 21 and a net frame 22.
Inside, the handling cylinder 1 is rotatably mounted with its axis oriented in the front-rear direction, and the second processing cylinder 2 is rotatably mounted at the right rear position of the handling cylinder 1 with its axis oriented in the front-rear direction. The handling cylinder 1 and the second processing cylinder 2 are arranged substantially parallel to each other in the left-right width direction in a plan view, and the feed chain 19 is suspended outside the threshing section C.

As shown in FIG. 1, in the sorting section D, the Karato 3 is arranged in the front part, and the swinging swinging sorting body 4 is arranged in the rear of the sorting part D. The first gutter 5 and the second gutter 6 for collecting the grains and the second grain are arranged, and 7 and 8 indicate the first conveyor and the second conveyor provided in each gutter.

As shown in FIG. 1, the mowing section E pivotally supports the rear end of the mowing frame 9 on the front of the machine body a so as to be vertically rotatable, and is vertically movable by an elevating hydraulic cylinder. Divided board 1 from 9 to 9
1, a raising tine 12, a cutting blade 13, and a scraping body 14 are arranged.

As shown in FIG. 1, the operating portion F is provided on a step plate 16 projecting from the right front end edge of a substantially plate-shaped chassis 15 forming a part of the machine body a. An operation lever 18 is projectingly provided on an operation column 17 which is erected upright.

As shown in FIG. 1, the motor part G is disposed on the right front part of the chassis 15, that is, behind the step plate 16 protruding from the chassis, and the running part B, the threshing part C, the sorting part D, Power is transmitted to the reaping section E and the straw processing section I via interlocking mechanisms.

In the combine A constructed as described above, the gist of the present invention resides in the attachment / detachment structure of the handling cylinder 1 in the threshing section C.

As described above, the threshing section C is constructed by axially mounting the handling barrel 1 in the handling chamber 24, and the handling barrel 1 forms the outer periphery of the handling barrel 1, as shown in FIG. A large number of handling teeth 26 are provided on the outer periphery of the substantially cylindrical drum 25, and the front and rear surfaces are front and rear end plates 27,
The pipe-shaped member 29 having an insertion hole 29a with a regular hexagonal cross section is inserted through the center of the front-and-rear end plates 27, 28, and the front-and-rear flanges 30, 3 are provided on the outer periphery of the front-and-rear portion of the pipe-shaped member 29.
1 is welded and the central portions of the front and rear end face plates 27 and 28 are fixed to the front and rear flanges 30 and 31, respectively, to form an integral handling cylinder 1. The rear end of the drum 25 of the handling cylinder 1 and the pipe shape. Member 29
The rear end and the rear end are formed on the same plane.

Further, between the front wall 20 and the rear wall 21 of the handling room 24,
The handling cylinder support shaft 32 having a regular hexagonal cross-section is mounted so that it can be pulled out in the front direction, and the front and rear ends of the handling cylinder support shaft 32 and the front and rear walls 20, 21
Front and rear positioning collars 35 and 36, which are externally fitted to the front and rear portions of the handling cylinder support shaft 32, are interposed between the front and rear shaft supporting portions 33 and 34 provided at the front and rear.

That is, the front positioning collar 35 is formed into a cylindrical shape so that the handling barrel support shaft 32 can be inserted therethrough, and the small diameter portion 35a fitted to the front shaft supporting portion 33 on the outer peripheral surface and the inner side from the front shaft supporting portion 33. A large diameter portion 35b that protrudes from the front side of the large diameter portion 35b and the retaining ring 37 fitted on the front end portion of the small diameter portion 35a. It is movable, but it is supported so that it cannot slide in the axial direction.

As described above, the structure can be strengthened by mounting the front positioning collar 35 on the front shaft supporting portion 33 for supporting the thrust load applied to the handling cylinder 1 so as not to slide in the axial direction.

The rear positioning collar 36 is formed in a cylindrical shape so that the handling cylinder support shaft 32 can be inserted therethrough, and the rear positioning collar 36 is provided on the outer peripheral surface thereof.
A small-diameter portion 36a for fitting into the 34 and a large-diameter portion 36b formed behind the small-diameter portion 36a are formed, and are rotatably and axially slidably supported by the rear shaft supporting portion 34.

The handling cylinder support shaft 32 is connected to the pipe-shaped member 29.
By inserting the inside, the handling barrel 1 is rotatably accommodated in the handling chamber 24.

Incidentally, the handling barrel support shaft 32 and the pipe-shaped member 29
The cross-sectional shape of the insertion hole 29a and the front and rear positioning collars 35, 36 is not necessarily limited to a regular hexagon, and for example, a polygon such as a square or a spline does not change its relative position to transmit the drive in the rotation direction, and the axial direction. Any cross-sectional shape that allows the handle barrel support shaft 32 to be pulled out from the insertion hole 29a can be used for.

In the figure, 38 is a substantially disk-shaped front dustproof wheel mounted on the inner surface of the front wall 20 of the handling chamber 24.
An extending portion 39 having a substantially L-shaped cross section is extended in the rearward direction at the periphery of the front wheel extending portion 39, and the front wheel extending portion 39 is fitted into a front end face recess 40 formed in the front end face plate 27 of the handling cylinder 1. .

The front dustproof wheel 38 is provided on the front wall of the handling room 24.
20 Can be fixed to the inner surface by spot welding,
By doing so, the front wall 20 of the handling chamber 24 can be strengthened, the structure can be simplified, and the number of handling members at the time of attaching the handling cylinder can be reduced to facilitate the work.

Reference numeral 42 denotes a substantially disk-shaped rear dustproof wheel detachably attached to the inner surface of the rear wall 21 of the handling chamber 24. The front end portion of the rear positioning collar 36 is inserted into the central portion of the rear dustproof wheel 42. A central hole 43 for forming a central hole 43, and an extension portion 44 having a substantially L-shaped cross section is extended in the front direction at the peripheral edge.
Is fitted into a rear end face plate recess 45 formed in the rear end face plate 28 of the handling cylinder 1, and the peripheral edge of the extending portion 44 is projectingly provided on the rear face of the rear end face plate 28. Is covered by.
46a is a dust ring mounting bolt.

Then, the front end of the rear positioning collar 36 is inserted into the insertion hole 47 formed in the center of the rear dustproof wheel 42 to position the rear dustproof wheel 42 and fix it to the rear wall 21 with the bolt (42a). There is. Reference numeral 48 is a front pulley for transmitting power to the handling barrel 1, and is fixed to the front end of the handling barrel support shaft 32 with a double nut 50 via a cylindrical hub 49 attached to the center. Reference numeral 51 is a rear pulley, and the handle barrel support shaft 32
It is attached to the rear end portion of the vehicle through a key 52 and a bolt 53. Reference numeral 54 denotes a biasing spring, which is interposed between the rear shaft support portion 34 and the large diameter portion 35b of the rear positioning collar 36 to bias the rear positioning collar 36 in the rearward direction. Reference numerals 55 and 55 are cutting blades fixedly provided on the inner peripheral surface of the handling chamber 24, and are for cutting and removing the grain culm around the handling tooth 26 and allowing the handling tooth 26 to effectively act.

Next, the dimensions and related positions of each part of the handling cylinder 1 and each part of the handling chamber 24 will be described.

In the figure, L1 and L2 are front and rear end face plates 27 and 28, respectively.
It is the amount of protrusion of the pipe-shaped member 29 from the above, and by setting L1 = L2, even if the pipe-shaped member 29 is mistakenly assembled in the front and rear of the handling cylinder 1, it will be immediately recognized, Correct assembly is possible.

Further, L3 is the amount of protrusion of the front dustproof wheel 38 from the inner surface of the front wall 20 of the handling chamber 24, L4 is the distance between the inner surface of the rear wall 21 of the handling chamber 24 and the rear end of the handling cylinder 1, and L5 is the handling chamber. The distance between the inner surface of the front wall 20 of 24 and the front end of the handling cylinder 1, L6 is the amount of protrusion from the front end of the pipe-shaped member 29 at the front end of the handling cylinder 1, and L3> L5 and L6 ≧ 0. Is moved to the last side of the handling room 24, L5> L3
Therefore, it becomes possible to move the handling cylinder 1 in the direction perpendicular to the axis while avoiding the front dustproof wheel 38.

The embodiment of the present invention is constructed as described above, and in order to remove the handling cylinder 1 from the handling chamber 24, the bolt (42a) is removed to remove dust from the rear, as shown in FIG. Free the wheel 42, pull out the bolt 53 at the rear end of the handling cylinder support shaft 32, remove the rear pulley 51, and then slide the handling cylinder (1) backward as shown in FIG. And the rear positioning collar
36 is pushed by the pipe-shaped member 29 and pushed out rearward, the fitting state of the extending portion 39 into the front end face concave portion 40 is released, and there is sufficient play for the handling cylinder 1 to dodge the front dustproof wheel 38. .

Therefore, as shown in FIG. 4 (c), with the front positioning collar 35 still installed,
(1) and the rear dustproof wheel 42 can be taken out together.

In order to mount the handling barrel 1 in the handling chamber 24, the reverse procedure described above may be used. Specifically, the front positioning collar 35 is attached to the front shaft support 33 and fixed by the retaining ring 37. Then, the rear positioning collar 36 is half-inserted into the rear shaft support portion 34 from the outside so that the front end of the rear positioning collar 36 is flush with the inner surface of the rear wall 21, and the rear end surface recessed portion 45 of the handling cylinder 1 is protected against dust. The handling cylinder 1 having the wheel 42 fitted therein is accommodated at a predetermined position in the handling chamber 24, and the handling cylinder support shaft 32 having the front pulley 48 attached thereto is attached to the front positioning collar 35, the pipe-shaped member 29, and the rear positioning collar 36 from the front. , And then the rear positioning collar 36 is pushed forward through the center hole 43 of the rear dustproof wheel 42, whereby the handling cylinder 1 can be rotatably accommodated at a predetermined position in the handling chamber 24. At the same time, the rear dustproof wheel 42 can be positioned at a predetermined position.

A rear pulley is attached to the rear end of the handling cylinder support shaft 32.
When the bolt 53 is tightened to attach the 51, the rear positioning collar 36 is pushed forward, the pipe-shaped member 29 is tightened by the front and rear positioning collars 35, 36, and the handling cylinder 1 is fixed to the handling cylinder support shaft 32. Will be done.

After that, the rear dustproof wheel 42 is bolted (42a).
By fixing with, the attachment of the handling cylinder 1 and the rear dustproof wheel 42 is completed.

FIGS. 5 and 6 show a rear dustproof wheel 60 of another embodiment. The rear dustproof wheel 60 has the rear positioning collar between the lower end edge of the rear dustproof wheel 60 and the center hole 61. A slit 62 is formed to allow 36 to pass through, and as shown in FIG. 6, the ends of the closing plates 63, 63 made of a flexible material such as rubber are attached to the left and right side edges of the slit 62 in a butt shape. ,
Prevents the handling items from entering. Further, as shown in FIG. 7, the handling cylinder 64 is slidable back and forth, and in order to attach / detach the dustproof wheel 60 after this, the handling cylinder 64 is moved forward so that the handling cylinder 64 and the rear wall 21 are separated from each other. It can be done at intervals.

In FIG. 8, the ends of the closing plates 65 and 66 are replaced with seams 67.
A modification example in which the intrusion prevention effect of the object to be handled is enhanced by stacking the objects in the direction of rotation of the object cylinder 64 will be described.

By doing so, the rear dustproof wheel 60 can be mounted after the handling barrel 64 is mounted in the handling chamber 24, and the handling barrel 64 and the rear dustproof wheel 60 are separately mounted. The attachment work of the handle cylinder 64 and the rear dustproof wheel 60 becomes easy.

[0041]

According to the present invention, the inner end portions of the front and rear dustproof wheels mounted on the front and rear walls of the handling chamber are fitted in the front and rear concave portions formed on the front and rear end surfaces so as to be rotatable about the shaft center. When supporting the handling barrel between the front and rear walls that form the handling chamber, one of the front and rear dustproof wheels is fixed and the other is removable, and the handling barrel support shaft is inserted in the axial direction of the handling barrel. A hole is opened, and the handling cylinder support shaft is shaped so that the relative position does not change with respect to the insertion hole so as to transmit the drive in the rotation direction, and it is inserted in the axial direction so that it can be removed freely, and the handling cylinder support shaft is supported. A front and rear positioning collar externally fitted to the handling cylinder support shaft is provided between the shaft support portions of the front and rear walls, one of the positioning collars is fixed to the shaft support portion on the same side, and the other is slid against the handling cylinder support shaft. Since it can be moved and fixed freely, it is easy to attach and detach the handling cylinder. Work can be finished in a short period of time.

That is, the difficult work such as bolting in the narrow gap between the front and rear walls of the handling chamber and the front and rear end face plates of the handling barrel, which is necessary in the conventional structure, is eliminated, and in the present invention, the threshing portion is eliminated. The gap between the peripheral wall and the drum, the cutting teeth fixed on the tooth of the drum and the peripheral wall of the threshing part, and the relative positions of the front and rear end face plates of the drum and auxiliary members such as front and rear dustproof wheels are automatically positioned. As a result, these adjustments are not required and the work is facilitated. Furthermore, the clearances and the relative positions between the respective parts of the handling cylinder, the respective parts of the handling chamber, and the attached members are accurate, so that the threshing performance is improved.

Further, a pipe-shaped member is disposed on the axis of the handling cylinder, the pipe-shaped member is located in the front and rear end face recesses formed on the front and rear end faces of the handling barrel, and the front and rear end faces of the pipe-shaped member are handled. By making the front and rear end faces flush with each other, it is possible to move the positioning collar outward until it is flush with the wall of the handling chamber by sliding the handling barrel in the axial direction when removing the handling barrel. As a result, a special tool such as a puller is not required, the labor for removing the handling cylinder is saved, and the work can be performed easily and in a short time.

Further, since the positioning collar on the side supporting the thrust load of the handling cylinder is not slidable in the axial direction with respect to the shaft support portion on the same side, the mounting of the positioning collar becomes firm and the shaft of the handling cylinder is mounted. The support structure can be strengthened.

[Brief description of drawings]

FIG. 1 is an overall side view of a combine having a handle barrel structure of the present invention.

FIG. 2 is a partially cutaway perspective view of a handling room.

FIG. 3 is a cross-sectional explanatory view showing a shaft structure of a handling cylinder.

FIG. 4 is an explanatory view showing a procedure for removing the handling cylinder.

FIG. 5 is a front view of a rear dustproof wheel of another embodiment.

6 is a cross-sectional view taken along the line I-I of FIG.

FIG. 7 is a sectional explanatory view of a handling cylinder of another embodiment.

8 is a cross-sectional view taken along line I-I of FIG. 5 (transformation example).

[Explanation of symbols]

1 handle 20 front wall 21 rear wall 24 handling room 25 drums 29 Pipe-shaped member 29a insertion hole 32 Handle barrel support shaft 33 Front axle 34 Rear axle support 35 Front positioning collar 36 Rear positioning collar 38 Front dustproof wheel 40 Front end surface recess 42 rear dustproof wheel 45 Rear end surface recess

Front Page Continuation (72) Inventor Tadayoshi Sato, 428 Enami, Okayama City, Okayama Prefecture, Seirei Industrial Co., Ltd. (56) References: Kaihei 3-122631 (JP, U) Shokai 62-21831 (JP, U) Actual Kaihei 3-58936 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) A01F 12/00 A01F 12/18

Claims (3)

(57) [Claims] 1. A structure that is rotatable about an axis, and
The front and rear end face recesses (40) (45) formed in the front and rear end faces, the handling chamber (24)
Front and rear dustproof wheels (38) (42) mounted on the front and rear walls (20) (21) of
One of the front and rear dustproof wheels (38) (42) is used to support the handling cylinder (1) with the inner end of the front and rear walls supported between the front and rear walls (20) (21) forming the handling chamber (24). And the other one is removable, and the handling barrel support shaft is aligned in the axial direction of the handling barrel (1).
The insertion hole (29a) of (32) is opened, and the handle barrel support shaft (32) is inserted
It is shaped so that the relative position does not change with respect to (29a) so as to transmit the drive in the rotational direction, and it is inserted in the axial direction so that it can be pulled out freely, and the handling cylinder 1 and the front and rear shaft support parts of the front and rear walls (20, 21) ( 33) (3
The front and rear positioning collars (35) and (36) that are fitted onto the handle barrel support shaft (32) are provided between 4), and one of the positioning collars (35) and (36) is fixed to the shaft support on the same side. The other is a structure for a handle barrel shaft of a combine, wherein the other is slidable / fixable with respect to the handle barrel support shaft (32). 2. A structure which is rotatable about an axis, and
The front and rear end face recesses (40) (45) formed in the front and rear end faces, the handling chamber (24)
Front and rear dustproof wheels (38) (42) mounted on the front and rear walls (20) (21) of
One of the front and rear dustproof wheels (38) (42) is used to support the handling cylinder (1) with the inner end of the front and rear walls supported between the front and rear walls (20) (21) forming the handling chamber (24). And the other one is removable, and the handling barrel support shaft is aligned in the axial direction of the handling barrel (1).
The insertion hole (29a) of (32) is opened, and the handle barrel support shaft (32) is inserted
It has a shape that does not change the relative position so as to transmit the drive in the rotational direction to (29a), and is inserted so that it can be pulled out in the axial direction, and the shaft support of the handling cylinder (1) and the front and rear walls (20) (21). (33) (34)
Between the handle barrel support shaft (32) and the handle barrel support shaft (32).
Positioning collar (3
5) Provided with (36), and a pipe-shaped member on the axis of the handling cylinder (1)
(29) is arranged, the pipe-shaped member is located in the front and rear end face recesses (40) and (45) formed in the front and rear end faces of the handling cylinder (1), and the front and rear end faces of the pipe-shaped member (29) are handled. A combine handling abutment frame structure characterized by being flush with the front and rear end faces of the body (1). 3. A structure that is rotatable about an axis, and
The front and rear end face recesses (40) (45) formed in the front and rear end faces, the handling chamber (24)
Front and rear dustproof wheels (38) (42) mounted on the front and rear walls (20) (21) of
One of the front and rear dustproof wheels (38) (42) is used to support the handling cylinder (1) with the inner end of the front and rear walls supported between the front and rear walls (20) (21) forming the handling chamber (24). And the other one is removable, and the handling barrel support shaft is aligned in the axial direction of the handling barrel (1).
The insertion hole (29a) of (32) is opened, and the handle barrel support shaft (32) is inserted
It has a shape that the relative position does not change so as to transmit the drive in the rotation direction to (29a), and it is inserted in the axial direction so that it can be removed freely, and the shaft support part of the handling cylinder (1) and the front and rear walls (20) (21) (33) (34)
Between the positioning collars fitted on the handle barrel support shaft (32).
(35) (36) is provided, and the positioning collar on the side of the handle cylinder (1) that bears the thrust load is not slidable in the axial direction with respect to the shaft support on the same side. Body shaft structure.