JPH0155824B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a plurality of transmission means at one transmission position at a plurality of locations around the circumference of the first rotating body in order to ensure torque transmission by a plurality of transmission means. A first rotation acting on the second rotary body is provided, and an artificial operating tool is provided that presses each rotary end surface of a plurality of interlocking second rotary bodies and displaces the first rotary body in the radial direction of the second rotary body. The present invention relates to a transmission device equipped with a clutch mechanism that relieves pressure against the body.

[Conventional technology]

Conventionally, in the above-mentioned transmission device, the second
The clutch mechanism was comprised of a hydraulic device including a hydraulic pump, a switching valve, and a hydraulic cylinder to press the rotary body against the first rotary body and to release the pressure. (For example, Japanese Utility Model Application Publication No. 55-163566) [Problems to be solved by the present invention] However, in the case of an aircraft that is not equipped with a hydraulic drive device, a special hydraulic pump or switching device is required to provide a clutch mechanism. A hydraulic device such as a valve must be provided, and the hydraulic pump must be linked to a power source, making the entire device complex and large, and potentially increasing costs.

The object of the invention is to enable the clutch mechanism to be of simpler mechanical construction.

[Means for solving problems]

A characteristic configuration of the transmission device of the present invention is that, in forming the clutch mechanism, a swinging lever whose one end acts on the second rotating body to switch between a press-contact state and a non-press-contact state of the second rotary body with respect to the first rotary body are separately provided for each of the second rotating bodies, and each pivot point of the swing lever is located near each of the second rotating bodies, and
A movable member is provided that extends the other end of the swing lever near the rotational support shaft of the first rotary body and simultaneously presses each of the other ends in a direction along the rotational support shaft to switch to the non-pressure contact state. , the movable member and the manually operated member are interlocked and connected by a mechanical interlocking mechanism, and the effects are as follows.

[Effect]

In other words, each pivot point of each swinging lever, one end of which acts on the second rotating body, is located near the second rotating body,
Since the other end extends close to the rotational shaft of the first rotating body, pressing the other end causes the swinging lever to swing and press the second rotating body against the first rotating body. The operating force required to loosen the force is small due to the lever action. Furthermore, by providing a movable member with a simple structure that only pushes the other end of the swinging lever in the direction along the rotation support shaft, a plurality of swinging levers can be pressed at the same time, and each of the second rotating bodies In order to switch the plurality of second rotating bodies to a non-pressing state, compared to providing a plurality of mechanical clutch mechanisms separately near the second rotating bodies to switch each of the plurality of second rotating bodies to a non-pressing state,
The simple structure allows for reliable clutch operation, and
Since the manual operation member and the movable member are interlocked and connected by the mechanical interlocking mechanism, the entire structure can be made smaller than when a hydraulic device is provided.

〔Effect of the invention〕

Therefore, the simple structure makes it easy to operate the clutch in the transmission device, which improves operability.Furthermore, even if the aircraft is small and is not driven by hydraulics, it can be used without increasing the size of the entire device. It has become easy to manufacture at low cost.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

As shown in Figure 2, the traveling transmission case 1
A frame 2 is extended forward from the frame 2, the engine E is mounted on this frame 2, and the transmission case 1 is mounted on the frame 2.
The lower part supports a pair of left and right propulsion wheels 3, and the upper part is attached with a control handle 4 that extends rearward and upward, and between the engine E and the transmission case 1 is a control lever with the handle 4 attached. A continuously variable transmission device 5 is provided at the rear of the transmission case 1 in the middle of the upper and lower portions of the transmission case 1. The hitch 6 is connected to various working machines to form a walking management machine that travels.

The continuously variable transmission 5 is within the width of the engine E,
It is disposed between the engine E and the transmission case 1, and is constructed as shown in FIGS. 1 and 3. In other words, the output shaft 8 of the engine E is provided within the width of the engine E and protrudes toward the transmission case 1 side, which is arranged within the width of the engine E.
In addition, a substantially dish-shaped drive disk 9 made of sheet metal is fixed so that its end face faces toward the rear of the aircraft, and the output shaft 8 and PTO shaft 12 are brought together and directly interlocked with each other so that their shaft centers are the same. , a cylindrical rotation support shaft 1 that loosely fits concentrically with the PTO shaft 12
3 is provided with a spline-fitting member 14, and at one end of this boss member 14 is a substantially dish-shaped passive disk 1 made of sheet metal having the same diameter and coaxial core as the drive disk 9.
0 is attached, and the other end of the boss member 14 is formed with an engagement groove 14A in which a shift fork 15 that is interlocked and connected to the operating lever 7 engages, and the passive disk 10 is rotatably supported in conjunction with the operation of the operating lever 7. It is configured to be freely displaceable in the direction along the axis 13.

Then, the outer peripheral portions 9A, 1 of both disks 9, 10
The rotating end surface 16A is pressed against the outer peripheral portion 9.
There are disk-shaped intermediate transmission disks 16 arranged at three locations A and 10A, one end of which can freely come into contact with the outer side of the intermediate transmission disk 16.
A swinging lever 17 for switching between a pressure contact state and a non-pressure contact state with respect to the passive disk 10 of 6 is provided separately for each intermediate transmission disk 16, and each pivot point 18 of the swing lever 17 is located near each intermediate transmission disk 16. At the same time, the other end of the swinging lever 17 is extended near the rotational support shaft 13 of the passive disk 10, and the other ends of the swinging lever 17 are simultaneously moved around the rotational support shaft 13 by a rotation operation around the rotational support shaft 13. a ring-shaped cam member 1 that switches to the non-pressure contact state by pressing in a direction along
9 is attached to the transmission case 20 so as to surround the rotating support shaft 13.

The cam member 19 is interlocked with the clutch lever 21 via a wire 22 and a swing arm 23. When the clutch lever 21 is pulled, the cam member 19 moves around the swing lever 17 around the rotational shaft 13.
The other ends are configured so that they can be pressed against the drive disk 9 side.

Each of the swing levers 17 is pressed toward the opposite side of the drive disk 9 by the biasing force of a spring 24 provided on the transmission case 20 at the other end, and one end is always connected to the intermediate transmission disk 16.
It is configured so that it can be pressed against both disks 9 and 10.

The cam member 19 is configured such that the engaging portion between the boss portion 14 and the shift fork 15 enters inside the cam member 19 as the passive disk 10 is displaced.
That is, at least the passive disk 10 is arranged so as to enter inside the cam member 19 at a position where the intermediate transmission disk 16 is shifted to the forward high speed range on the outer peripheral side near the cam member 19.

The rear end of the rotary support shaft 13 is interlocked and connected via a bevel gear 25 to a traveling power transmission shaft 11 inside the transmission case 1 that faces substantially downward. The above-mentioned member is fitted into the rotary support shaft 13 so as to be freely rotatable.
The PTO shaft 12 is protruded toward the rear of the fuselage to facilitate connection for transmitting power to an attachment connected to the hitch 6.

The substantially dish-shaped driving disk 9 and passive disk 10 have mounting bolts 27 on one side that protrude inward of the case 20 for attaching the transmission case 20 to the frame 26 on the engine E side.
In order to space them apart as much as possible, the outer circumferential side is formed into a substantially dogleg shape in cross section with the outer circumferential side being biased toward the other side, and the pivot portion 15A of the shift fork 15 near the rotating support shaft 13 is inserted into a recess formed on the other side. This is designed to make the entire continuously variable transmission more compact.

As shown in FIG. 4, the ring-shaped cam member 19 has a fixed side ring cam 19A fixed to the transmission case 20, and a cam surface that comes into sliding contact with the cam surface 19a of the fixed side ring cam 19A, and , and a concentric movable ring cam 19B, and when the movable ring cam 19B is rotated around the central axis O, it is pushed in the direction along the central axis O by the action of both cam surfaces 19a and 19b, The movable ring cam 19B is configured to be separated from the fixed ring cam 19A, and as the movable ring cam 19B moves, the other end of the swing lever 17 is pressed toward the drive disk 9 side.

[Another example]

The substantially dish-shaped disks 9 and 10 may have a curved cross section in addition to the substantially doglegged shape, or may have a ring-shaped recess or protrusion in the circumferential direction, or a recess along the radial direction. Alternatively, it includes a reinforcing structure that forms a convex portion, or any rotating body made of sheet metal that has a shape other than a straight line in cross-section.

The passive disk 10 is fixed to one end of the boss portion 14 with a bolt 28.
and the boss member 14 may be integrated.

The operating lever 7 and the shift fork 15 are collectively referred to as a human operating tool.

Instead of the clutch lever 21, a pedal may be used, and these are collectively referred to as a manual operation member.

A rod may be used instead of the wire 22, and the wire 22 and swing arm 23 are collectively referred to as a mechanical interlocking mechanism.

Instead of the mounting bolt 27 that is attached to the inside of the transmission case 20, a fixed nut may be used, and these are collectively referred to as protrusions.

A spring 24 that biases the swing lever 17
Instead of bringing the intermediate transmission disk 16 into pressure contact with both disks 9 and 10 via the swinging lever 17, a spring is provided for urging each intermediate transmission disk 16 directly toward both disks 9 and 10. It may be provided separately.

The intermediate transmission disk 16 is referred to as a second rotating body, and the disk that is in pressure contact with the rotating end surface 16A of the second rotating body 16 and is displaced in the radial direction is a driving side disk instead of a passive side disk. They are collectively referred to as the first rotating body 10.

Even if the drive disk 9 interlocked with the plurality of second rotary bodies 16 is replaced by a bevel gear device interposed between the output shaft 8 and the second rotary bodies 16 in an interlocked state, one device on the passive side may be used. It's okay to be,
These are collectively called a transmission device.

Instead of the cam member 19, a cylindrical member surrounding the rotational support shaft 13 and movable in the direction along the rotational support shaft 13 may be used, and these are collectively referred to as movable members.

The present invention is applicable not only to walking type management machines but also to tractors,
It can be used for various traveling devices such as earthmoving vehicles and transport vehicles.

[Brief explanation of drawings]

The drawings show an embodiment of the transmission device according to the invention,
FIG. 1 is a longitudinal sectional side view of the main part, FIG. 2 is an overall side view of the walking management machine, FIG. 3 is a longitudinal sectional front view of the main part, and FIG. 4 is a longitudinal sectional view of the main part. 7,15...Human operation tool, 9...Transmission device, 1
0...First rotating body, 10A...Surrounding part, 13...Rotating shaft, 16...Second rotating body, 16A...Rotating end surface, 17...Swinging lever, 18...Pivot point, 19
...Movable member, 21...Manual operation member, 22,2
3...Mechanical interlocking mechanism.

Claims (1)

[Claims] 1. Each rotating end surface 16A of a plurality of second rotating bodies 16 interlocked with one transmission device 9 is pressed against a plurality of locations on the circumference 10A of the first rotating body 10, and the first rotating body 10 is
The transmission device is provided with human operating tools 7, 15 for displacing the second rotary body 16 in the radial direction, and a clutch mechanism for loosening the pressure applied to the first rotary body 10 acting on the second rotary body 16. In order to form the clutch mechanism, a swinging lever 17 is provided, one end of which acts on the second rotary body 16 to switch between a state in which the second rotary body 16 is in pressure contact with the first rotary body 10 and a state in which it is not in pressure contact with the first rotary body 10. Each pivot point 18 of the swinging lever 17 is located near the second rotating body 16, and the other end of the swinging lever 17 is connected to the first rotating body 16. A movable member 19 is provided which extends near the rotational support shaft 13 of the rotating body 10 and simultaneously presses each of the other ends in a direction along the rotational support shaft 13 to switch to the non-pressure contact state, and the movable member 19 and the artificial A transmission device in which an operating member 21 is interlocked and connected by mechanical interlocking mechanisms 22 and 23.