JPH082521Y2 - Mobile farm machinery - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to the rotation of an output shaft of an engine to an input shaft of a mesh case via a forward rotation belt or a reverse rotation belt that is selectively transmitted. The present invention relates to a transmission device for a mobile agricultural machine that is adapted to be transmitted.

[Problems to be Solved by Conventional Techniques and Inventions] Conventionally, the engine is mounted on an engine frame integrated with a mission case so that the engine can be moved back and forth, and the output axis of the engine is connected to the input axis of the mission case with tension. A forward rotation belt provided with a clutch, or a mobile agricultural machine in which the tip is interlocked and linked through a reverse rotation belt in which the power transmission is intermittently switched in a relationship opposite to the tension clutch 15 with respect to the output shaft, is actually Japanese Laid-Open Publication No. 58-45448, Japanese Laid-Open Publication No. 61-4
It is already known from the 4056 publication and the like.

In the known mobile agricultural machine, the frequency of use of the forward rotation belt is significantly higher than that of the reverse rotation belt, and since the forward rotation belt rotates at a higher speed than the reverse rotation belt, the elongation of the forward rotation belt is large. At the initial stage of this elongation, a predetermined tension can be obtained by adjusting the length of the operation wire of the tension clutch, which does not pose a problem, but when the elongation exceeds a certain level, for example, the forward rotation loosened during reverse rotation transmission. If the belt is stretched to the extent that it may come off, it cannot be dealt with by adjusting the length of the operating wire.

In order to solve such a problem, when the engine is adjusted so that it is separated from the mission case, the tip of the reverse rotation transmission system is separated from the output shaft of the engine and the reverse rotation transmission becomes impossible, or the drive rotation is stopped. Another problem arises in that the contact angle with the body is improper and slip is likely to occur.

[Means for Solving Problems] The present invention was devised in order to solve these problems in view of the actual situation as described above, and the engine is mounted on the engine frame which is integral with the mission case. A forward rotation belt provided with a tension clutch attached to the output shaft of the engine and the input shaft of the shift case, and the tip of the output shaft of the engine and the input shaft of the shift case being opposite to the tension clutch 15 in the opposite relationship. In a mobile agricultural machine interlockingly linked via a reversing belt in which power transmission is intermittently switched by, a tip of a swinging arm pivotally supported by a mesh case or a member integral with the pulley is mounted on the tip of the reversing belt. The swinging arm is divided so that the base end side arm and the tip end side arm have an overlapping portion, and the overlapping portion covers the inner surface of the reversing belt. While co-fastened cover plate is characterized in that it has a length adjustably fastened.

The present invention has the following structure.
When the engine is adjusted to be separated from the mission case, the swing arm of the reverse rotation belt can be adjusted to be long.

[Embodiment] An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes an engine frame which is screwed to both sides of a mesh case 2 to form an integral unit, and a forward protruding portion is provided with a speed reducer. The engine 3 of the rearward tilting type is mounted on the mounting frame 3a shown in FIG. 4 and is screwed by the screws 4 so that the longitudinal movement can be adjusted. Compared to the vertical engine shown in FIG. 6, the crankshaft heights H'and H of the engine 3 of the backward leaning type with deceleration are substantially equal, but the height 11 of the output shaft 7 is smaller than 1, so that It is necessary to make the accessory parts such as the engine frame 1, the belt cover, and the fender have different shapes, but this increases the cost, so the mounting frame 3a is interposed so as to share the above accessory parts. When the mounting frame 3a was formed by press-bending a thin iron plate, the vibration of the engine 3 could be alleviated. In addition,
5 is a hitch metal attached to the rear, 6 is a case 2
It is a wheel attached to the lower axle.

Output pulley 8 mounted on the output shaft 7 of the engine 3
Is composed of a small diameter portion 8a and a large diameter portion, and has a V groove 8b in the large diameter portion. A large diameter forward rotation pulley 11 and a small diameter reverse rotation pulley 12 are provided on the input shaft 10 of the above-mentioned mesh case 2. A forward rotation belt 13 which is attached so as to rotate integrally and is wound around the V groove 8b and the forward rotation pulley 11 is provided with a tension clutch 15 axially supported at the tip of a swing arm 14. .

A swing arm having a base rotatably supported on the input shaft 10.
A V-pulley 17 is rotatably supported at the tip of the 16
When the reverse rotation belt 18 is wound around the pulley 17 and the reverse rotation pulley 12 and the swing arm 16 is rotated downward, the front end turning portion of the reverse rotation belt 18 is pressed against the small diameter portion 8a of the output pulley 8 of the engine 3. Input shaft of the mission case 2
10 is driven in reverse.

The oscillating arm 16 of the reverse rotation transmission system extends from the mesh case 2 to support the input shaft 10, and is concentric with the base arm 21 fixed to a rotatable pipe 20 and the V-shaped arm. The pulley 17 is pivotally supported and is composed of a front end side arm 22 overlapping the side surface of the base side arm 21, and a plurality of mounting holes 23 are formed at the superposed part of the front end side arm 22 and the base side arm 21. ., 24 ... Are bored, and one of the holes, for example, hole 24, is formed as a long hole or a large diameter hole along the length direction of the arm, and the length is adjusted by bolts 25 .. and nuts 25a. A cover plate 26 that enables the cover and covers the inner surface of the reversing belt 18 is screwed in a state of being interposed.

Further, the swing arm 14 of the tension clutch 15 is urged to rotate upward by a tension spring 27, and an arm 28 extending rearward from the boss is a handle which is bifurcated in a plan view via an operation wire 30. 29, the swinging arm 16 of the reverse transmission system is urged upward by a return spring 32, connected to a lever 31 pivotally attached to one side of the pipe 20.
An arm 33 extending rearward from the above is connected to the other pivotally attached lever 34 of the handle 29 through an operating wire 35. 36 and 37 are covers.

In the above-mentioned mobile agricultural machine, when moving the machine forward,
When the levers 31 and 34 are separated from each other, the swing arm 16 is rotated upward by the return spring 32 to be in a non-transmission state, and the tension clutch 15 is rotated upward by the tension spring 27 to rotate the forward rotation belt 13. Because of the tension, the rotation of the output shaft 7 of the engine 3 is transmitted to the input shaft 10 of the transmission case 2, and the machine body travels forward. When the lever 28 is gripped and the arm 28 is pulled through the operation wire 30 during the forward traveling, the tension clutch 15 rotates downward, so that the forward rotation belt 13 relaxes and the machine body stops.

When the other lever 34 is grasped in this state, the swing arm 16 is rotated downward, and the leading end traveling portion of the reversing belt 18 is pressed against the outer periphery of the small diameter portion 8a of the output pulley 8, so that the reversing belt 18 is rotated. Then, the input shaft 10 rotates in the reverse direction, and the machine body travels backward.

Further, when the normal rotation belt 13 which is frequently used is stretched, the outer portion is moved and adjusted by the adjustment nut 38 to increase the pulling stroke in the initial stage. However, the forward belt 13
However, if it is difficult to cope with the above adjustment due to further extension, screw 4
.. are loosened to move the engine 3 forward, and then the screws 4 ... are tightened, the nut 25a .. of the swing arm 16 is loosened and the tip side arm 22 is moved forward and nuts 25a .. Tighten. At that time, adjustment may be performed to shorten the operation stroke of the operation wire 30.

Moreover, since the swing arm 16 adjusts the length,
The base end side arm 21 and the tip end side arm 22 are divided so as to have a overlapped portion, and the overlapped portion is fixed so that the length can be adjusted. Since the cover plate 26 covering the inner surface is also tightened, it is assumed that the inner cover 37 is cut out to secure the swing space of the swing arm 16.
The notched portion can be covered with the cover plate 26 which has been fastened together, so that it is possible to prevent the reverse belt 18 and the pulleys 17 and 12 from being pinched.

FIGS. 8 to 11 show a device for mounting the handle 29, in which reference numeral 40 denotes a receiving metal screwed to the upper portion of the mesh case 2, and the upper surface thereof and the upper surface of the handle frame 41 are
The chrysanthemum seats 42 and 43 that mesh with each other are fixed as angle control members, and the lower part of the upper part of the chrysanthemum seat 43 is welded upright with a mounting pipe 45. A tightening bolt 46 inserted into the center hole of the chrysanthemum seat 43 is screwed into a screw hole formed in the center of the lower chrysanthemum seat so as to be rotatable and fixed, and the head portion of the upper end of the tightening bolt. Horizontal hole 47 and parallel surface
48.48 or a square member is formed, and the bent portion of the base portion of the rotation operation lever 50 is loosely fitted in the lateral hole 47 and the cap nut is formed.
When press-fitting 51 to prevent it from coming off and turning handle 29 back and forth, fit a wrench on two parallel surfaces and tighten the tightening bolt.
After loosening 46 a little, and then turning the turning operation lever 50 to loosen it further, after turning the handle 29 by turning, first turn the turning operation lever 50 to tighten it, and firmly tighten it with a spanner. .

At this time, the parallel surfaces 48, 48 become surfaces for fitting the wrench, and the process of forming the lateral hole 47 can be easily performed. Further, since the end of the cap nut 51 abuts on the two parallel surfaces. It can be firmly attached.

[Advantages] In short, since the present invention is constructed as described above, when the vehicle travels back and forth, the input shaft of the mesh case is based on the tension switching of the tension clutch and the swing switching of the swing arm. The forward / backward movement of the base body is performed as a result of the switching drive between the forward and reverse directions. When the forward rotation belt is extended, the engine is adjusted so as to be separated from the mesh case, and the swing arm is also moved. Should be adjusted to be long, which allows reverse rotation transmission at an appropriate contact angle.

Moreover, in order to adjust the length of the swing arm, the swing arm is divided into a base end side arm and a tip end side arm so as to have an overlapping portion, and the overlapping portion is fixed to the arm so that the length can be adjusted. However, since the cover plate that covers the inner surface of the reversing belt is fastened together with this fastening, it is assumed that the inner cover is cut out to secure the swing space of the swing arm. It can be covered with a cover plate that prevents the pinch between the reversing belt and the pulley.

[Brief description of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is a side view of a transmission, Fig. 2 is a plan view of the same as above, Fig. 3 is an exploded perspective view of essential parts, and Fig. 4 is a mounting frame. FIG. 5, FIG. 5 is a side view of a rearward leaning engine with a reducer, FIG. 6 is a side view of a vertical engine, FIG. 7 is a side view of a small mobile agricultural machine, and FIG. 8 is a cross section of a handle mounting portion. FIG. 9 is a sectional view of the rotary operation handle mounting portion, FIG. 10 is an exploded perspective view of the tightening bolt and the rotary operation handle, and FIG. 11 is a sectional view of the cap nut. In the figure, 1 is an engine frame, 2 is a mission case,
3 is an engine, 4 is a screw, 7 is an output shaft, 8 is an output pulley, 10 is an input shaft, 13 is a normal belt, 16 is a swing arm, 17
Is a V pulley, 18 is a reverse belt, 21 is a base end side arm,
22 is an arm on the tip end side, and 26 is a cover plate.

Claims (1)

[Scope of utility model registration request] 1. An engine 3 is mounted on an engine frame integrated with a mission case 2 so that the engine 3 can be moved back and forth, and an output shaft 7 of the engine 3 and an input shaft 10 of the mission case 2 are provided with a tension clutch 15. Forward rotation belt
13 and a tip of the reversing belt 18 in a mobile agricultural machine in which the tip is interlocked with the output shaft 7 via a reversing belt 18 in which power transmission is intermittently switched in an inverse relationship to the tension clutch 15. The hung pulley is pivotally supported on the tip of a swing arm 16 which is pivotally supported by the movement case 2 or a member integrated with it, and the swing arm 16 is connected to a base end side arm 21 and a tip end side arm 22. A transmission device for a mobile agricultural machine, characterized in that it is divided so as to have a superposed portion, and the superposed portion is fixedly attached while a cover plate 26 covering the inner surface of the reversing belt is tightened together.