JPH0611218Y2 - Power transmission mechanism of chain drive vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention provides a chain drive in which two wheels or three wheels are provided on the left and right as a traveling device, and these wheels are driven through chain transmission. The power transmission mechanism of a car.

(Prior Art) The chain drive vehicle is described in, for example, Japanese Utility Model Publication No. 52-32871.

In this chain drive vehicle, a sprocket and a wheel mounting member are separately mounted on the rotary shaft.

(Problems to be solved by the invention) In the above configuration, when repairing by breaking the chain or breaking the sprocket, the wheel mounting member and the sprocket must be removed from the rotary shaft, but this part is Since the rotation shaft, the wheel mounting member and the mounting portion of the sprocket are rusted, it may be difficult to remove, and repairing often takes time.

(Means for Solving the Problem) Therefore, the present invention is configured as follows.

That is, the tubular transmission member 3 in which the wheel mounting portion 36 and the sprocket portion 37 are integrally formed on a plurality of front and rear axles 34, 39, 43 protruding laterally from the vehicle body frame 5.
8, 40, 40 are externally fitted and axially supported and fixed, and the transmission member 3
The chain 29 is wound around the sprocket portions 37 of 8 and 40 to drive the wheels 1, 2 and 3 attached to the wheel attaching portion 36.

(Operation and Effect of the Invention) With the above-described configuration, the drive force is transmitted to the transmission member 38 attached to the shaft end of the one axle 34 serving as the drive shaft, and the wheel 3 attached to the wheel attachment portion 36. To the sprocket portion 37 of the transmission member 40 attached to the shaft ends of the other axles 39, 43 through the chain 29 wound around the sprocket portion 37 of the transmission member 38, and the wheels of the transmission member 40 are transmitted. The wheels 2 and 1 attached to the attachment portion 36 are driven.

When repairing this transmission mechanism, first, the wheels 1, 2, 3 are removed from the wheel mounting portion 36 of the transmission members 38, 40, and the transmission members 38, 40 are further replaced by the axle 34, 40.
It will be done by removing from 39, 43,
Since the wheel mounting portion 36 and the sprocket portion 37 are disengaged from the axles 34, 39, 43 with the removal of the transmission members 38, 40, the number of detachable members is smaller than that of the conventional structure described above, and the work can be performed efficiently. .

In addition, the end portions of the axles 34, 39, 43 are connected to the cylindrical transmission member 3
Since it is covered with 8, 40, 40, the mounting portion of the wheels 1, 2, 3 to which mud adheres has a rustproof structure, and from this point also, the repair work for removal is easy.

Further, the power transmission to the wheels 1, 2, 3 is caused by the wheel mounting portion 36.
And a sprocket part 37 formed integrally with a transmission member 38,
Since it is carried out via the wheel 40, a twisting force does not act on the wheels 1, 2 and 3, and the structure is less likely to be damaged.

(Embodiment) Next, a specific configuration of the present invention will be described based on an embodiment shown in the drawings.

A luggage carrier 6 is mounted on the front part and a driving frame 7 is mounted on the rear part of a vehicle body frame 5 equipped with a traveling device 4 in which three wheels 1, 2, and 3 are arranged side by side in front of and on the right of the left side. .

The cargo bed 6 is surrounded by a cargo frame 8 so that earth and sand can be loaded thereon, and is pivotally attached to the chassis frame 5 by a bracket 9 projecting downward from the bottom. As shown in FIG. 2 and FIG. 3, the pivot portion of the bracket 9 has a resilient holding member 12 for a bracket 9 on the loading platform 6 side and a support shaft 11 fitted and fixed to the bracket 10 on the vehicle body frame 5 side. Is pivoted through.

The elastic holding member 12 is formed by pressing the inner rectangular cylinder 13 and the outer rectangular cylinder 14 at the corners thereof by 45 ° and press-fitting the cylindrical rubber pillar 15 into the inner corner of the outer rectangular cylinder 14. The relative rotation of the square cylinder 13 and the outer square cylinder 14 causes the rubber column 15 to be distorted, and the restoring force of the rubber column 15 works to return the neutral column to the neutral position. Clamp 17 to mounting piece 16 protruding from bracket 9
And the support shaft 11 fixed to the chassis frame side bracket 10 is fitted in the inner square cylinder 13 by using the bolt 18 and the nut 19, and as shown in FIG. It is held at a position (M) approximately midway between (L).

In addition, in order to hold the loading platform 6 at the substantially intermediate position (M),
2 instead of the elastic holding member 12 using the rubber column 15
Various configurations such as a configuration using individual torsion springs are possible.

The rear part of the loading platform 6 is attached to the vehicle body frame 5 via the anti-vibration rubber 20.
I try to put it on top. Reference numeral 21 denotes a hook for preventing the cargo bed 6 from jumping up. A shaft 22 with which the hook 21 engages and a release lever 23 for releasing the engagement are provided.
The engagement of the hooks 21 is released by the rotation of, and the handle 24 protruding rearward from the luggage carrier 6 is lifted to dump the luggage carrier.

The prime mover 7 has a prime mover (not shown) installed therein, and a steering operation tool such as a speed change lever 25 and a traveling clutch lever 26 is provided on a rear side of the prime mover 7, and power is supplied to a mission case 27 attached to a lower body frame 5. I try to transmit.

The traveling device 4, as shown in FIG. 4, FIG. 5 and FIG.
Chain cases 2 attached to the left and right sides of the body frame 5
A chain 29 in the wheels 8 and 28 drives three wheels 1, 2 and 3 respectively provided on the left and right.

The chain case 29 includes an inner case 30 and an outer case 31.
The outer case 31 is laterally removed to allow the inside to be opened, and the front end case 32 slides forward and backward with respect to the rear case 28 to absorb the extension of the chain 29. There is. Reference numerals 33 and 33 are tension bolts for sliding the front case 32.

Output shaft 3 protruding left and right from the mission case 27
4, a transmission member 38, which is covered with a pipe 35 and has a wheel mounting portion 36 and a sprocket portion 37 integrally formed at its shaft end, is fitted and fixed; 3 and the sprocket part 37.

The axle 39 for supporting the wheel 2 in the front-rear intermediate portion is detachably attached to the vehicle body frame 5, and a transmission member 40 integrally formed with a wheel attachment portion 36 and a sprocket portion 37 is attached to a bearing 41 at the axle end thereof. Is supported through the output shaft 34
The chain 29 wound around the sprocket portion 37 of the transmission member 38 attached to the above is engaged with the sprocket portion 37 to rotate the transmission member 40 and the wheel 2. By removing the axle 39 from the vehicle body frame 5, a four-wheel type traveling device including the front wheels 1 and the rear wheels 3 is obtained.

Incidentally, an axle connecting member 46 for connecting the left and right axles 39, 39
Is also detachable from the vehicle body frame 5 together with the axles 39, 39.

The front wheel 1 has an axle 43 fixed to a slide frame 42 that slides in the front-rear direction with respect to the vehicle body frame 5.
The same transmission member 40 as the transmission member 40 of the intermediate wheel 2.
The wheel 1 is attached via.

Thus, the axles 39 and 43 of the intermediate wheel 2 and the front wheel 1 are
Since the wheels 2 and 1 are rotated by being fixed to the vehicle body frame 5 and the slide frame 42, respectively, and the transmission members 40 and 40 being rotated, the axles 39 and 43 are not subjected to a torsional force, and a small diameter shaft is strong. Is sufficient.

The transmission members 40, 40, 38 of the wheels 1, 2, 3 are
As shown in the figure, the chain 29 is wrapped around to transmit power. 44 and 45 are tension sprockets.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a partially cutaway front view, FIG. 2 is a partially enlarged front sectional view, and FIG. 3 is a partially enlarged side sectional view. FIG. 4 is a plan sectional view, and FIGS. 5 and 6 are partially enlarged side sectional views. 1, 2, 3 ... Wheels 5 ... Body frame, 29 ... Chains 34, 39, 43 ... Axle 36 ... Wheel mounting portion, 37 ... Sprocket portion 38, 40 ... Transmission member

Claims (1)

[Scope of utility model registration request] 1. A cylindrical transmission member 38, 40 in which a wheel mounting portion 36 and a sprocket portion 37 are integrally formed on a plurality of front and rear axles 34, 39, 43 projecting laterally from a vehicle body frame 5. , 40 are externally fitted and axially supported and fixed, and the transmission member 3
A power transmission mechanism for a chain drive vehicle, which is configured to wind a chain 29 around sprocket portions 37 of 8 and 40 to drive wheels 1, 2 and 3 attached to a wheel attachment portion 36.