JP3120794U - Auxiliary wheel device in crawler work vehicle - Google Patents

Abstract

A distance between a pair of auxiliary wheels can be easily changed to be used as a three-wheeled vehicle or a two-wheeled vehicle. Further, the present invention provides an auxiliary wheel device in a crawler type work vehicle that exhibits the function of a wheel even in a narrow place such as a tunnel.
A three-wheeled crawler-type work vehicle having a crawler positioned at the center of a vehicle body and a pair of left and right auxiliary wheels is arranged with a pair of auxiliary wheels 43 and 44 in a straight line. A pair of left and right auxiliary wheels 43, 44 are disposed at both ends of the axle 45 so as to be movable, and the wheels 43, 44 are fixed to both ends of the axle 45 by stoppers 46. It is possible to run as a three-wheeled vehicle, and a pair of left and right auxiliary wheels 43, 44 are arranged near the center of the axle 45, and each wheel 43, 44 is fixed by a stopper 46 and combined with the crawler 30, two front and rear wheels. It is assumed that the vehicle body 30 has handles 41 and 42 in order to be able to travel like a vehicle and to support the vehicle body when traveling like a front and rear two-wheeled vehicle.
[Selection] Figure 3

Description

  The present invention relates to an auxiliary wheel device in a three-wheeled vehicle type crawler work vehicle having one crawler and a pair of left and right auxiliary wheels.

  For example, a crawler type work vehicle called a cat car or the like for transportation purposes includes a three-wheeled vehicle type including one crawler and two pairs of auxiliary wheels. When using this type of crawler work vehicle and passing through a narrow place like a saddle road, the distance between a pair of auxiliary wheels may be wider than the road width. The wheel cannot be grounded and the wheel function cannot be used.

  Conventionally, this type of work vehicle is disclosed in JP-A-8-169367. However, the auxiliary wheel of the present invention only serves as a support when the vehicle body is tilted upward, and the vehicle itself cannot be used in a narrow place such as a saddle road. Moreover, even if the utility model registration No. 3075031 is not a crawler type, only two auxiliary wheels are fixedly installed, and the above inconvenience cannot be avoided.

JP-A-8-169367 Utility model registration No. 3075031

  The present invention has been made paying attention to the above points, and the problem is that the distance between a pair of auxiliary wheels can be easily changed, and it can be used as a three-wheeled vehicle or a two-wheeled vehicle. Is to do so. Another object of the present invention is to provide an auxiliary wheel device in a crawler type work vehicle that exhibits the function of a wheel even in a narrow place such as a saddle road.

  In order to solve the above-described problems, the present invention is a three-wheeled crawler type work vehicle having one crawler positioned at the center of the vehicle body and a pair of left and right auxiliary wheels. A pair of left and right auxiliary wheels are arranged at both ends of the axle so as to be movable, and the wheels are fixed by stoppers so that the vehicle can run as a three-wheeled vehicle. A pair of left and right auxiliary wheels are placed close to the center, and each wheel is fixed by a stopper and can be run like a front and rear two-wheeled vehicle together with a crawler. In addition, the vehicle body is provided with a handle.

  The crawler type work vehicle to be the subject of the present invention is a three-wheeled vehicle type equipped with a crawler provided at the center of the vehicle body and a pair of left and right auxiliary wheels. Since it is used for purposes and applications such as a so-called cat car, the vehicle body only has to have a simple structure close to or close to the work platform.

  The auxiliary wheel device according to the present invention is provided with a pair of left and right auxiliary wheels so as to be movable on an axle arranged in a straight line on the vehicle body. The axle is configured to extend in the vehicle body width direction from the center portion of the vehicle body to the left and right end portions, and the auxiliary wheels can be arranged at both the center portion and both end portions. That is, when a pair of left and right auxiliary wheels are positioned at both left and right ends, the vehicle can run as a three-wheeled vehicle together with the central crawler. Since it narrows and becomes the same as one wheel, it can run like a two-wheeled vehicle together with the central crawler.

  The pair of left and right auxiliary wheels can be slid on the axle and arranged away from both ends of the axle, or arranged close to the center of the axle. The pair of left and right auxiliary wheels need to be fixed at both ends and the center of the axle, and a stopper is used for this purpose. The stopper fixes a pair of left and right auxiliary wheels rotatably at each position of the axle. For example, a structure that is fixed to an axle by elasticity and is detachable with a fingertip and has a structure that is arranged at a fixed position is suitable for this purpose.

  The three-wheeled crawler work vehicle of the present invention has a handle on the vehicle body to support the vehicle body when traveling like a front and rear two-wheel vehicle. In the state of a two-wheeled vehicle having a crawler and auxiliary wheels in the center, it is difficult to stably travel on rough terrain such as a saddle road, and thus a handle is required to achieve stability. As a handle for this purpose, a handle that spreads to the left and right like a handle of a cat car is more suitable than a pull frame like a rear car.

  Note that self-supporting is possible even in a two-wheeled vehicle state in which a pair of left and right auxiliary wheels are brought to the center. However, even if this is the case, the instability is undeniable, and even though it is a two-wheeled vehicle, it is possible to travel stably by providing a handle that spreads to the left and right.

  Since the present invention is configured and operates as described above, it can be used as a three-wheeled vehicle or a two-wheeled vehicle by simply changing the distance between the pair of auxiliary wheels. . Moreover, since this invention becomes a two-wheeled vehicle at any time, there exists an effect that a crawler type work vehicle can be used as a work vehicle which exhibits the function of a wheel also in a narrow place like a tunnel.

  Hereinafter, an auxiliary wheel device in a crawler type work vehicle according to the present invention will be described in more detail with reference to the illustrated embodiment. FIG. 1 is a plan view of a crawler type work vehicle 10 that is the subject of the present invention, FIG. 2 is a side view, and FIG. 3 shows a rear view.

  A crawler type work vehicle 10 that is an object of the present invention is a simple work vehicle represented by a one-wheel type transport carriage generally called a cat car or the like. The illustrated crawler type work vehicle 10 is equipped with an internal combustion engine as a prime mover 11, and its output shaft 12 communicates with a power shaft 14 that is orthogonal in a gear box 13, and the rotation of the power shaft 14 is transmitted by a transmission 15. Shift.

  A relatively large-diameter low-speed input pulley 16 and a small-diameter high-speed input pulley 17 are attached to the power shaft 14, and a relatively large-diameter low-speed output is connected to the drive shaft 24 coupled to the crawler 30. A pulley 18 and a high-speed output pulley 19 having a smaller diameter are attached. The low speed belt 20 is wound around the relatively large diameter low speed input pulley 16 and the low speed output pulley 17, and the high speed belt 21 is looped around the small diameter high speed input pulley 18 and the high speed output pulley 19. The belt 20 of the pulleys 16 and 17 on the low speed side and the belt 21 of the pulleys 18 and 19 on the high speed side can hardly transmit the torque even when the power shaft 14 is rotated. The tension is adjusted to the extent.

  Between the low-speed belt 20 and the high-speed belt 21, a void S generated by the difference in the diameters of the pulleys 16, 17 or 18, 19 is formed. Therefore, two tension rollers 22 and 23 are arranged in the space S. The tension rollers 22 and 23 are provided side by side on a single roller shaft 26 in accordance with the positions of the belts 20 and 21. The roller shaft 26 is rotatably supported at the tip of the speed change lever 25.

  The transmission lever 25 pressurizes the low-speed belt 20 to move in the direction of low-speed operation, pressurizes the high-speed belt 21 to move in the direction of low-speed operation, or keeps neutral without acting on either In order to perform the operation, it is attached to the vehicle body side so as to be vertically rotatable by a support shaft 27. The transmission lever 25 has a flexible portion 25b made of an elastic material between the operation knob 25a outside the support shaft 27, and the shaft portion 25c of the operation knob 25a is a locking portion made of a positioning groove of the operation panel 28. It is configured to be positioned by engaging with any of 29H, 29N, and 29L (see FIGS. 2 and 3).

  A small sprocket 31 is attached to the drive shaft 24, and a large sprocket 33 is attached to the crawler shaft 32, and these are connected by a chain 34. A driving wheel 35 and a driven wheel mounting portion 36 are attached to the crawler shaft 32, and a driven wheel 37 provided at the tip of the crawler shaft 32 and a crawler belt 38 wound around the driving wheel 35 are driven. Reference numeral 39 denotes a crawler mounting frame, and 40 denotes a vehicle body.

  Reference numerals 41 and 42 denote handles, and 43 and 44 denote auxiliary wheels provided at the rear of the vehicle body. The three-wheeled crawler work vehicle 10 that is the subject of the present invention has handles 43 and 44 that are wide on the left and right, like the handle of a cat car, to support the vehicle body 40 when traveling like a front and rear two-wheel vehicle. . The auxiliary wheel device 40 according to the present invention is provided with a pair of left and right auxiliary wheels 43 and 44 that are arranged on the vehicle body 40 so as to move on an axle 45. The axle 45 is a single member that extends in the vehicle body width direction from the center of the vehicle body 40 to both left and right ends, and is configured so that the auxiliary wheels 43 and 44 can be arranged at both the center and both ends. Yes.

  The pair of left and right auxiliary wheels 43 and 44 are slidable on one axle 45, and are arranged away from both ends of the axle 45 or close to the center of the axle 45. Stopper 46 is used. The stopper 46 fixes a pair of left and right auxiliary wheels 43 and 44 so as to be rotatable at each position of the axle 45, and is fixed to the axle 45 by elasticity and can be attached and detached with a fingertip. And a fixing pin 48 that can be inserted into and extracted from a positioning hole 49 formed in the axle 45 (see FIG. 4).

  According to the present invention, when the pair of left and right auxiliary wheels 43 and 44 are positioned at both left and right ends (the chain line in FIG. 3), the vehicle can run as a three-wheeled vehicle together with the central crawler 30 and the tread of the auxiliary wheel If the road width is wider than that, three-wheel driving is possible. Also, when the pair of left and right auxiliary wheels 43 and 44 are moved toward the center of the axle, the distance between the pair of left and right auxiliary wheels 43 and 44 is reduced to be the same as that of one wheel (FIG. 3 solid line). Along with the crawler 30, the vehicle can run like a two-wheeled vehicle.

The top view which shows an example of the auxiliary wheel apparatus in the crawler type work vehicle which concerns on this invention. The side view of the thing of FIG. The rear view of the thing of FIG. The top view which shows an example of a stopper with an axle shaft.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Crawler type work vehicle 11 Motor | power_engine 12 Output shaft 14 Power shaft 15 Transmission 16 Large diameter low speed input pulley 17 Small diameter high speed input pulley 18 Large diameter low speed output pulley 19 Small diameter high speed output pulley 20 Low speed belt 21 High speed belt 22, 23 Tension roller 24 Drive shaft 25 Shift lever 26 Roller shaft 27 Support shaft 28 Operation panel 29H, 29L, 29N Locking portion 30 Crawler 31 Small sprocket 32 Crawler shaft 33 Large sprocket 34 Chain 35 Drive wheel 36 Drive wheel assembly 37 Followed wheel 38 Crawler belt 39 Crawler mounting frame 40 Car body 41, 42 Handle 43, 44 Auxiliary wheel 45 Axle 46 Stopper 47 C-shaped ring 48 Fixing pin 49 Positioning hole

Claims (2)

In a three-wheeled crawler-type work vehicle with one crawler located in the center of the vehicle body and a pair of left and right auxiliary wheels, a pair of auxiliary wheels can move on an axle arranged in a straight line. A pair of left and right auxiliary wheels are arranged at both ends of the axle, and each wheel is fixed by a stopper so that it can run as a three-wheeled vehicle. It is characterized in that each wheel is fixed by a stopper and can be driven like a front and rear two-wheeled vehicle together with a crawler, and further, a handle is provided on the vehicle body to support the vehicle body when driving like a front and rear two-wheeled vehicle. Auxiliary wheel device for crawler type work vehicles. The stopper can fix a pair of left and right auxiliary wheels rotatably at each position of the axle, is fixed to the axle by elasticity, and is detachable with a fingertip, and is arranged at a fixed position. The auxiliary wheel device in the crawler type work vehicle according to claim 1 having a structure.

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