JPH0979331A - Clutch structure in cultivator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and rapidly adjust a microadjusting part of a clutch wire for manipulating a clutch mechanism part through a grip part of a manipulating handle, and to simply disassemble the clutch mechanism part. SOLUTION: A clutch mechanism part C depresses a belt 7 wound around a drive wheel 5 of an engine part and a driven wheel 6 of a transmission casing 3, so as to apply a tension to the belt in order to transmit a power. A holder 15 is secured to the transmission casing 3, and accordingly, the clutch mechanism part C can be actuated through a wire member W which is removably attached to the holder 15 through the intermediary of a wire member base 13. The holder 15 has a sheath shape, and the wire member base 13 can be moved in a substantially vertical direction and be adjusted, relative to the holder 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch structure for a cultivator capable of easily and quickly adjusting a fine adjustment part of a clutch wire for performing a clutch mechanism part with a handshake part of an operating handle and the like, and easily disassembling work. Regarding

[0002]

2. Description of the Related Art In a conventional field cultivator, a clutch mechanism has a belt wound between an engine-side prime mover and a drive case-side follower, and tension is applied to the belt from the prime mover. Rotational force is transmitted to the driven vehicle, and further the rotational force is transmitted from the driven vehicle to the tilling shaft for running or tilling work. Further, by loosening the tension of the belt, the traveling force or the tilling work is stopped without the transmission of the rotational force from the driving vehicle to the driven vehicle. In the transmission mechanism of the type having such a structure, the clutch that applies tension to the belt employs a clutch in which a rotatable roll member is provided on the free end side of the swinging arm member. The clutch is further connected to the handshake part of the operation handle by a wire member, and by operating the lever of the handshake part, the arm member is pulled or released to apply tension to the belt. , Can be loosened.

[0003]

As described above, the belt for transmitting the rotational force from the prime mover to the follower gradually expands with the lapse of use time, and the contact surfaces between the prime mover and the follower wear gradually. Then, even if the clutch mechanism section presses the belt, insufficient tension is applied,
It becomes impossible to transmit a proper rotational force to the driven vehicle. Therefore, in order for the clutch mechanism section to press the belt to generate an appropriate tension, the tension of the wire member for operating the clutch mechanism section can be adjusted. With this adjustable structure, the arm member of the clutch is pulled up by the required angle via the wire member,
The roll member presses the belt so that sufficient tension is applied to the belt.

Therefore, in order for the wire member to be able to pull up the arm member of the clutch mechanism portion by a necessary amount, the wire member is provided with a fine adjustment portion for adjusting the wire member. The fine adjustment unit includes an adjustment housing that supports the end cap portion of the wire tube. Then, the outer screw part of the adjustment housing is screwed into a supporting metal fitting fixed to an appropriate place such as the drive case of the main body of the cultivator, and the adjustment housing of the wire tube is properly rotated to move in the vertical direction. Make fine adjustments. Actually, this fine adjustment work is extremely troublesome because the height adjustment is performed while rotating the outer screw part of the adjustment housing with respect to the inner screw part of the support fitting, and the work posture that is impossible for the worker. Therefore, various inconveniences such as fatigue may be caused because the screw adjustment requires a relatively long time.

Further, even when the operating handle is disassembled from the engine and drive unit cases, and the cultivator is made compact to be stored in the trunk of a passenger car, the wire member can be temporarily removed from the frame of the cultivator. It is extremely convenient if possible. It cannot be said that the conventional one can easily disassemble the work, and even when reassembling, the adjustment of the tension of the wire member is considerably troublesome work.

[0006]

Therefore, as a result of earnest studies to solve the above-mentioned problems, the inventor wound a belt between the prime mover of the engine part and the follower car of the transmission case of the present invention. Hang, press the belt to give tension,
A clutch mechanism portion for transmitting power is provided, and a holder is fixed to the transmission case portion, the clutch mechanism portion is operable through a wire member, and the wire member is detachable from the holder through a wire member base. Also, the holder has a sheath shape, and the wire member base has a clutch structure in a cultivator that is movable and adjustable in a substantially vertical direction with respect to the holder, so that the clutch mechanism can be easily and quickly adjusted. Not only is it possible, but also when disassembling the main parts of the cultivator and putting them together in a compact manner, the wire members can be easily removed, thus solving the above problems.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. The cultivator equipped with the present invention is shown in FIG.
As shown in, the engine part 1 is mounted on the frame 2,
A transmission case 3 is arranged behind the engine unit 1. The drive from the engine unit 1 is interlocked with a drive shaft 4 located below the frame 2 via a transmission case 3 containing a transmission mechanism formed of a pulley, a belt, a chain, or the like. There is also a shaft drive type in the transmission case 3. In the case of small tillers,
The drive shaft 4 is provided with drive wheels (tires), iron wheels, or at the time of plowing work, a plowing part (not shown) provided with plural plowing blades is detachably provided. Some are equipped with a rotary tiller.

An operating handle A for operating the cultivator is provided on an angle adjusting base 20 arranged above the transmission case 3 (see FIGS. 1 to 3 etc.).
The operation handle A is inclined rearward and upward, and its angle can be adjusted in a plurality of steps. The angle adjusting structure of the operation handle A has handle shaft portions 21 and 2.
The handle end portions 21b, 21b of No. 1 are attached to the angle adjusting base 20 via a pivot member 23 such as a bolt and a nut. Then, if necessary, the operation handle A
In some cases, the structure may be detachable from the angle adjustment base 20 (see FIGS. 10 to 12).

The raising and lowering angle of the operating handle A can be fixed at a desired position according to the worker's height and working conditions, and can be set at the most suitable position for the worker. The operation handle A has a handle shaft portion 2
1, 21. Both handle shafts 21,2
The base side of No. 1 is formed in a substantially parallel manner with a narrow interval when seen in a plan view, and is widened toward the handshake portions 21a, 21a side to have a substantially C-shape when seen in a plan view. One handle shaft part 2
A clutch operating lever 22 is provided at a position of the handshake portion 21a. The clutch operating lever 22 may be provided on the operating handle A other than the handshake portion 21a.

A prime mover 5 for transmitting the output of the engine as a rotational force is provided on one side of the engine section 1 in the left-right direction, and a driven wheel is provided at an upper portion of the transmission case 3 on the one side of the left-right direction. 6 is provided, and a belt 7 is wound between the driving wheel 5 and the driven wheel 6 (see FIGS. 1 and 3). The belt 7 is loosely wound around the driving wheel 5 and the driven wheel 6, and a tension is generated in the belt 7 by a clutch mechanism section C described later, so that the driving wheel 5 is driven through the belt 7. 6 is a structure for transmitting a rotational force to 6. As the driving wheel 5 and the driven wheel 6, specifically, pulleys are used. Then, the rotation of the driven wheel 6 transmits the rotational force to the drive shaft 4 provided in the lower portion of the transmission case 3.

The clutch mechanism C is arranged on the frame 2 between the driving wheel 5 and the driven wheel 6. As shown in FIGS. 2 and 3, the clutch mechanism portion C is composed of a swing arm 8 and a tension member 9, and the swing arm 8 is swingably provided in the vertical direction. . Specifically, one end of the swing arm 8 is the frame 2
Is pivotally supported by a pivot pin member 2b so as to be swingable with respect to a pivot base 2a provided on the upper part of the. A tension member 9 is mounted on the free end side of the swing arm 8. The tension member 9 has a roller shape and is rotatably attached to the swing arm 8.

The swinging arm 8 swings up and down,
When the tension member 9 presses the belt 7, as shown in FIG. 3, an appropriate tension is generated in the belt 7 between the driving wheel 5 and the driven wheel 6, and the rotational force from the engine unit 1 is generated. The prime mover 5 thus received can transmit the rotational force to the follower 6. In the state where the belt 7 is not pressed by the tension member 9, the belt 7 is loose between the driving wheel 5 and the driven wheel 6 (see the imaginary line portion of the belt 7 in FIG. 3). Indicates that the rotational force is not transmitted to the driven vehicle 6.

The swinging motion of the swinging arm 8 is operated by the wire member W. The wire member W is the wire 1
0, wire tube 11, base 12, and base receiving member 1
7 and the like (see FIG. 3). Then, the wire 10 is housed in the wire tube 11, and the wire 10
Is configured to slide in the wire tube 11. The caps 12, 1 are attached to both ends of the wire tube 11.
2 is installed. One end of the wire member W is connected to the clutch mechanism portion C side, and the other side is connected to the clutch operating lever 22 side (see FIG. 4). And
By gripping the clutch operating lever 22 together with the handshake portion 22, the wire 10 of the wire member W is moved to
The swinging arm 8 of the clutch mechanism portion C is pulled up, and the tension member 9 presses the belt 7.

In the above structure, one end of each of the ferrules 12, 12 at both ends of the wire tube 11 is fixed in a stationary state before the clutch operating lever 22. Further, the base 12 portion on the other side is structured to be fixed to an upper portion of the transmission case 3 at a location above the clutch mechanism portion C (see FIG. 4). Then, the wire member base 13 fixes the mouthpiece 12 on the clutch mechanism portion C side (see FIG. 2).

The wire member base 13 is shown in FIG.
As shown in FIG. 3, the support plate portion 13a and the fixed plate portion 13b are formed, and the fixed plate portion 13b is formed in a substantially right angle shape with respect to the support plate portion 13a. The fixed plate portion 13b
A through hole 13c with an internal screw is formed in the. Also,
A mark portion 13d may be provided on the fixed plate portion 13b, if necessary. Specifically, the mark portion 13d has a plurality of mark through holes 13d ₁ , 13d ₁ , ...
Is formed so that the mark pin member 18 can be fitted and fixed [see FIG. 5 (D)]. Alternatively, the mark portion 13d is simply a scale type fixing plate portion 13d.
There is also a type described in b or marked (see FIG. 8).

The wire member base 13 is the holder 1.
It is detachably attached to 5. The holder 15 is fixed to an upper portion of the transmission case 3 (see FIGS. 3 and 4), and the holder 15 has a sheath shape having an insertion hole 15b penetrating in the vertical direction, and the wire member base 1
It has a structure in which the fixed plate portion 13b of No. 3 can be inserted. A through hole 15a with an internal screw is formed on the front side of the holder 15, and a fixing bolt 16 that is screwed into the through hole 15a with an internal screw and has a tip protruding into the insertion hole 15b is provided. Then, the support plate portion 13a inserted into the insertion hole 15b of the holder 15 is fixed by the fixing bolt 16 [see FIGS. 5 (A) and 5 (B)].

The fixing plate portion 13 of the wire member base 13
b can be moved vertically with respect to the holder 15 by loosening the fixing bolt 16, and by tightening the fixing bolt 16, the support plate portion 1 of the wire member base 13 is fixed.
3a can be set at a desired height position (see FIG. 8). Further, the holder 15 may be provided with an adjusting body 24 for adjusting the wire member base 13 in the vertical direction. As shown in FIG. 6 (A), the adjusting body 24 is attached to the lower portion of the holder 15 and has a receiving member 24a provided with an adjusting screw portion 24b. The receiving member 24a
Specifically, from the lower end of the hanging piece 24a _{1 to} the horizontal piece 24a
₂ is formed, and is generally L-shaped when viewed from the side (see FIG. 6B).

The hanging piece 24a ₁ is fixed to the lower portion of the holder 15 by welding means or the like, and the adjusting screw portion 24b is screwed to the horizontal piece 24a ₂ by rotating the adjusting screw portion 24b appropriately. The shaft end portion of the adjusting screw portion 24b pushes up the bottom portion of the fixing plate portion 13b of the wire member base 13 and sets it to a desired height. By providing the adjusting body 24 below the holder 15, the height of the wire member base 13 can be finely adjusted.

The wire member W has a base receiving member 17
Is provided. The mouthpiece receiving member 17 includes a hollow screw rod portion 17a having a hollow through hole in the axial direction and a hollow polygonal head portion 1.
7b, and the hollow screw rod portion 17a is screwed into the through hole 13c with the internal thread of the wire member base 13 [see FIG. 7 (A)]. The mouthpiece receiving member 17 has a structure for receiving the mouthpiece 12 of the wire member W and allowing only the internal wire 10 to pass therethrough (see FIG. 7B). Then, by rotating the hollow polygonal head 17b, the mouthpiece receiving member 17 moves up and down in the through hole 13c with the inner screw, and the height of the mouthpiece 12 portion of the wire member W with respect to the wire member base 13 is finely adjusted. It can be carried out. A hook 10a is fixed to an end of the wire 10 on the side of the clutch mechanism C, a spring 14 is connected to the hook 10a, and the wire 10 is connected to an appropriate portion of the swing arm 8 via the spring 14. There is. The swing arm 8 is formed with a through hole 8a capable of locking the hook-shaped bent portion of the spring 14.

Regarding the setting of the mouthpiece receiving member 17, the position of the mouthpiece 12 of the wire member W and the height of the support plate portion 13a of the wire member base 13 are appropriately set. Assuming that an appropriate dimension in the low state is H _s and an appropriate dimension in the high state is H _{h in} the height from above the plate portion 13a, the tension of the wire 10 is larger when the dimension is H _h. a tension than in the H _s [FIG 7 (B) refer to Fig. Further, when the wire member base 13 is moved in the vertical direction with respect to the holder 15, relatively large adjustment can be performed. That is, the wire member base 13 is moved upward with respect to the holder 15 by an appropriate dimension L.
_{When the} wire 10 is moved by _u , the wire 10 is tensioned, and the wire 10 is in a loosened state by moving the wire member base 13 downward by an appropriate dimension L _d (see FIG. 8).

Next, as another embodiment of the holder 15, there is a holder 15 in which the insertion hole 15b is substantially horizontal. The wire member base 13 corresponding to the holder 15 of the embodiment is shown in FIGS. 9 (A) and 9 (B).
As shown in FIG. 5, the plate is of a horizontal plate type, and the support plate portion 13a and the fixed plate portion 13b are present on both sides of the same plate surface in the longitudinal direction. That is, one end in the longitudinal direction of the plate-shaped wire member base 13 is used as the support plate portion 13a, and the through hole 13c with the internal screw is formed. The other side is the fixed plate portion 13b. Then, the fixing plate portion 13b is inserted into the insertion hole 15b and tightened and fixed by the fixing bolt 16. In this embodiment, the wire member base 13 cannot be adjusted in the vertical direction. Also, the fixed plate portion 1
The wire 1 is provided between the outside of 3b and the through hole 13c with an internal screw.
A linear cut-through portion 13e that allows passage of 0 is formed, and when the mouthpiece receiving member 17 is attached to the wire member base 13, the wire 10 can be easily housed in the through hole 13c with the inner screw. It is possible [Fig. 9
(C)).

[0022]

The belt 7 loosely wound between the driving wheel 5 and the driven wheel 6 is provided on the clutch operating lever 2 of the operating handle A.
By pulling up 2 and pulling the wire member W closer, the swing arm 8 of the clutch mechanism C rotates upward, the tension member 9 presses the belt 7, and the belt 7 is tensioned, whereby the prime mover 5 Transmits the rotational force to the driven vehicle 6. The belt 7 gradually expands when it is used for a long time, and accordingly, it becomes necessary to increase the tension of the wire member W that operates the clutch mechanism portion C.

Therefore, the fixing bolt 16 of the holder 15 is fixed.
Is loosened, and the fixing plate portion 13b of the wire member base 13 fixed thereto is pushed upward by an appropriate amount, and the holder 15
On the other hand, the wire member base 13 is reset to a position slightly above the initial setting position. The wire member base 13 moves upward, and the mouthpiece receiving member 17 attached to the wire member base 13 and the mouthpiece 12 portion of the wire member W move upward (see FIG. 8). At the same time, the wire 10 in the wire tube 11 also moves, which increases the tension of the wire 10, increases the amount of pulling up of the swing arm 8, and increases the tension member 9 of the clutch mechanism portion C.
An appropriate tension can be applied when the belt 7 presses the belt 7.

Next, when the cultivator body and the operation handle A are disassembled into a compact state (see FIG. 10) to facilitate storage in the trunk of an automobile, first, the wire member W to which the wire member W is fixed is fixed. The base 13 is removed from the holder 15 (see FIGS. 11 and 12). Thereby, the wire member W and the clutch mechanism portion C can be easily separated. Furthermore, by separating the wire member W from the clutch mechanism C, the work of removing the operation handle A from the cultivator body can be efficiently performed. In addition, when the operation handle A is connected to the cultivator body again for assembly, the wire member W
By mounting the wire member base 13 supporting and fixing the wire member W in the holder 15 in the original state, it is possible to return the wire member W to the same state as the tension of the wire member W before the disassembly. When fixing the wire member base 13 to the holder 15, the mark portion 13d provided on the fixing plate portion 13b of the wire member base 13 is used as a reliance and is aligned with the mark portion 13d position of the wire member base 13 fixed to the holder 15 before disassembly. Thus, the proper installation of the wire member base 13 can be performed easily and quickly, and the tension of the wire member W before disassembly can be obtained.

[0025]

According to the first aspect of the invention, the belt 7 is wound between the driving wheel 5 of the engine 1 and the driven wheel 6 of the transmission case 3, and the belt 7 is pressed to apply tension. A clutch mechanism portion C for transmitting power is provided, and a holder 15 is fixed at three positions of the transmission case. The clutch mechanism portion C is operable via a wire member W, and the wire member W is interposed via a wire member base 13. The holder 1
By adopting a clutch structure in the cultivator that can be detachably attached to 5, the body part and the operation handle part are disassembled into a compact state such as when the cultivator is housed in the trunk of an automobile and transported. The work can be done very efficiently.

To explain the above effect in detail, in the present invention, the belt 7 is loosely wound between the driving wheel 5 of the engine section 1 and the driven wheel 6 of the transmission case 3, and tension is applied to the belt 7 so that the belt 7 is tensioned. For a type that transmits a rotational force from the moving vehicle 5 to the driven vehicle 6, disassemble the vehicle body portion including the engine portion 1 and the frame 2 and the operation handle A portion to make them compact or perform reassembling work. Is very effective about. That is, a holder 15 is fixedly provided near the clutch mechanism portion C, and a wire member base 13 that supports a wire member W for operating the clutch mechanism portion C is detachably and fixedly attached to the holder 15. are doing.

Therefore, when the operating handle A is disassembled from the main body of the tiller to make it compact, the wire member W for operating the clutch mechanism C is disassembled by removing the wire member base 13 from the holder 15. The disassembling work can be performed efficiently without being bothersome when performing the work. Further, even when the disassembled cultivator body and the operation handle A are reassembled, proper setting of the wire member W can be simply and quickly performed only by mounting the wire member base 13 on the holder 15.

According to a second aspect of the present invention, in the first aspect, the holder 15 has a sheath shape, and the wire member base 1
3 has a clutch structure in a cultivator that can be moved and fixed in a substantially vertical direction with respect to the holder 15, so that first, tension is applied to the belt 7 wound between the driving wheel 5 and the driven wheel 6. It is possible to easily and quickly adjust the applied clutch mechanism section C.

The above effects will be described in detail. The holder 15
Is a sheath shape, and the wire member base 13 is a holder 1
Since the wire member base 13 can be moved and fixed substantially vertically with respect to the wire member 5, the tension of the wire member W can be easily and quickly adjusted by moving the wire member base 13 in the vertical direction with respect to the holder 15. That is, since the wire member base 13 can be moved in the vertical direction, the position of the fixing portion of the wire member W can be set appropriately. Conventionally, adjustment of the tension of the wire member W is suitable only for fine adjustment because it is a screw type configuration only, but adjustment of a large range is also performed by rotating the screw, which is extremely troublesome and time consuming. It was troublesome and laborious. On the other hand, in the present invention, the wire member base 13 is moved in the vertical direction by a large amount with respect to the holder 15 and is fixed at a desired position, whereby a relatively large adjustment can be quickly performed. Further, if the wire member W has a screw type fine adjustment function with respect to the wire member base 13, the fine adjustment can be performed at the screw portion, and the adjustment work is further simplified. Is something that can be done.

Further, according to the third aspect of the present invention, in particular, since the support plate portion 13a and the fixed plate portion 13b constitute the wire member base 13 having a substantially L-shape, the vertical adjustment can be simplified. Moreover, there is an advantage that it can be done easily and surely.

[Brief description of drawings]

FIG. 1 is a side view of a tiller equipped with the present invention.

FIG. 2 is a perspective view of a main portion of a clutch mechanism portion at an angle adjustment base portion in the present invention.

FIG. 3 is a side view of a main portion of a clutch mechanism portion at an angle adjustment base portion in the present invention.

FIG. 4 is a schematic view showing a relationship between a clutch mechanism portion and a handshake portion of an operation handle.

5A is a perspective view of a main part showing an assembled state of a wire member, a wire member base and a holder. FIG. 5B is a sectional view taken along the line P1-P1 of FIG. (D) is a perspective view of another type of wire member base.

6A is a perspective view of a wire member base and a wire member provided on another type of holder, and FIG. 6B is a cross-sectional view taken along arrow P2-P2 of FIG.

FIG. 7A is a sectional view showing a state in which a mouthpiece receiving member and a mouthpiece portion of a wire tube are separated, and FIG. 7B is a sectional view showing a state in which the mouthpiece portion of a wire tube is inserted into the mouthpiece receiving member.

FIG. 8 is an operation diagram showing an operating state of the wire member and the clutch mechanism portion.

9A is a perspective view of the present invention in which another type of wire member base is used as a constituent member. FIG. 9B is a perspective view of a main part of the present invention including the wire member base shown in FIG. 9A. Is a plan view of the main part of the wire member base shown in FIG.

FIG. 10 is a side view showing a state in which an operation handle is removed from the tiller equipped with the present invention.

FIG. 11 is a side view of the main part of the cultivator equipped with the present invention with the operation handle removed.

FIG. 12 is a perspective view of a main part of the cultivator equipped with the present invention with an operation handle removed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Engine part 3 ... Transmission case 5 ... Driving car 6 ... Driven car 7 ... Belt 13 ... Wire member base 13a ... Support plate part 13b ... Fixed plate part 15 ... Holder C ... Clutch mechanism part W ... Wire member

Claims (3)

[Claims] 1. A clutch mechanism section for winding a belt between a driving wheel of an engine section and a driven wheel of a transmission case and pressing the belt to apply tension to transmit power is provided at the transmission case location. A clutch structure for a cultivator, wherein a holder is fixed, the clutch mechanism is operable via a wire member, and the wire member is detachable from the holder via a wire member base. 2. The clutch structure for a cultivator according to claim 1, wherein the holder has a sheath shape, and the wire member base is movable and adjustable in a substantially vertical direction with respect to the holder. 3. The holder according to claim 2, wherein the holder has a pierced sheath shape, and the wire member base penetrates a support plate portion that supports and fixes the wire member, and the holder,
A clutch structure for a cultivator, comprising a fixed plate portion that can be fixed at an appropriate position, and a support plate portion and a fixed plate portion that are substantially L-shaped.