JPH0139965Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention provides a single transmission device at multiple locations around the first rotating body in order to ensure torque transmission through multiple transmission means. A first rotation acting on the second rotary body is provided, and an artificial operating tool is provided that presses each rotating 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 so as to press the rotating body against the first rotating body and to release the pressure. (For example, Japanese Utility Model Application Publication No. 55-163566) [Problem that the invention attempts to solve] However, for aircraft that are not equipped with a hydraulic drive device, a special hydraulic pump or switching valve is required to connect the clutch function. It is necessary to provide a hydraulic system such as a hydraulic pump, and to link the hydraulic pump to a power source, which makes the entire system complicated and large, and there is a risk that the cost will increase.

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

[Means for solving problems]

A characteristic configuration of the transmission device of the present invention is that, 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
The other end of the swinging lever is extended near the rotational support shaft of the first rotating body, and the other ends of the swinging lever are simultaneously moved in a direction along the rotational support shaft by a rotation operation around the rotational support shaft. A ring-shaped cam member that is pressed to switch to the non-pressure contact state is provided surrounding the rotational shaft, and the cam member and the manually operated member are interlocked and connected by a mechanical interlocking mechanism, and the operation thereof is as follows. 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 support 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, in order to switch to the non-pressure contact state, a plurality of ring-shaped cam members are provided that press the other end of the swing lever in the direction along the rotation support shaft by rotation operation around the rotation support shaft. Since the swinging levers of the two rotating bodies are simultaneously pressed to switch each of the second rotating bodies to the non-pressing state, the plurality of mechanical clutch mechanisms for switching the plurality of second rotating bodies to the non-pressing state are individually rotated for the second rotation. Compared to a case where the clutch is provided near the body, the clutch can be operated more reliably with a simpler structure. Compared to pressing the other end of the swing lever, the length of the boss member in the direction along the rotation support shaft must be increased in order to slide stably, but with the ring-shaped cam member, the rotation support is Thickness in the direction along the axis can be reduced.

Further, since the manual operation member and the movable member are interlocked and connected by a mechanical interlocking mechanism, the entire apparatus can be made smaller than when a hydraulic device is provided.

[Effect of idea]

Therefore, with a simple structure, the clutch in the transmission device can be operated easily, improving operability, and furthermore, even if the aircraft is small and does not have a hydraulic drive device, the overall device size can be avoided. The transmission device itself could be made more compact and could be manufactured easily and 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 equipped with a control handle 4 that extends rearward and upward. 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 running management machine.

The continuously variable transmission device 5 is arranged 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 boss member 14 that is spline-fitted to the boss member 14. A substantially dish-shaped passive disk 10 made of sheet metal and having the same diameter and coaxial core as the drive disk 9 is attached to one end of the boss member 14, and the other end of the boss member 14 is attached to the drive disk 9. is formed with an engagement groove 14A in which a shift fork 15 that is interlocked and connected to the operation lever 7 engages, and the passive disk 10 is moved to the rotation support shaft 1 in conjunction with the operation of the operation lever 7.
It is configured to be freely displaceable in the direction along 3.

Then, the outer peripheral portions 9A, 1 of both disks 9, 10
The rotating end surface 16A is pressed into contact with 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 swing lever 17 for switching between a pressure contact state and a non-pressure contact state with respect to the six passive disks 10 is provided for each intermediate transmission disk 16, and each pivot point 18 of the swing lever 17 is located near each of the intermediate transmission disks 16. position, and the other end of the swing lever 17 is extended near the rotation support shaft 13 of the passive disk 10,
The ring-shaped cam member 19, which presses the other ends of the swing levers 17 simultaneously in the direction along the rotation support shaft 13 by rotating around the rotation support shaft 13 to switch to the non-pressure contact state, is connected to the rotation support shaft 13. It is attached to the transmission case 20 in a state surrounding it.

The cam member 19 is interlocked with the clutch lever 21 via a wire 22 and a swinging arm 23. When the clutch lever 21 is pulled, the cam member 19 moves around the rotational shaft 13 to each other end of the swinging lever 17. It is configured such that it 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 member 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 connected to the intermediate transmission disk. It is arranged so as to enter inside the cam member 19 at a position shifted to the forward high speed range on the outer peripheral side near the cam member 19 of No. 16.

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 PTO is fitted into the rotary support shaft 13 so as to be freely rotatable.
The shaft 12 is protruded to the rear of the aircraft, and the hitch 6
This makes it easier to connect the attachment for transmission.

The substantially dish-shaped drive 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, and 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 member 14 with a bolt 28.
0 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 the swing lever 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 may be a driving side disk instead of a passive side disk. They are often 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 transmission devices.

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

[Brief explanation of the drawing]

The drawings show an embodiment of the transmission device according to the present 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
...Cam member, 21...Manual operation member, 22,2
3...Mechanical interlocking mechanism.

Claims (1)

[Scope of utility model registration request] 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 connected to the second rotating body 16. The transmission device is provided with human operating tools 7 and 15 for displacing in the radial direction, and is provided with a clutch mechanism for loosening the pressure applied to the first rotating body 10 acting on the second rotating body 16, the clutch mechanism forming the clutch mechanism. Then, a swinging lever 17 whose one end acts on the second rotating body 16 to switch between a pressed state and a non-pressed state of the second rotating body 16 with respect to the first rotating body 10 is attached to the second rotating body 16. Each pivot point 18 of the swing lever 17 is located near each of the second rotating bodies 16, and the other end of the swing lever 17 is connected to the rotation support shaft 13 of the first rotating body 10. a ring-shaped cam member that extends nearby and simultaneously presses each of the other ends of the swing lever 17 in a direction along the rotation support shaft 13 by rotating around the rotation support shaft 13 to switch to the non-pressure contact state; 19,
A mechanical interlocking mechanism 2 is provided surrounding the rotational support shaft 13, and the cam member 19 and the manual operation member 21 are connected to each other by a mechanical interlocking mechanism 2.
2 and 23 are interlockingly connected transmission devices.