JPH063703U - Work vehicle connection structure for small tow trucks - Google Patents

Abstract

(57) [Summary] [Purpose] To speed up the operation of retaining and releasing the connecting pin that connects the towing vehicle and the work vehicle. [Structure] A connecting arm 8 extending rearward from a towing vehicle A and a connecting bracket 9b of a working vehicle B are connected to a head through a connecting pin 10 with a ring provided with an elastic ring 10b capable of switching the posture. The shape and size of the elastic ring 10b are set so that the elastic ring 10b can be engaged with the corner portion of the connecting bracket 9b of the working vehicle B while being connected.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a work vehicle connecting structure for a small towing vehicle, which connects a work vehicle such as a trailer to a rear portion of a self-propelled small towing vehicle such as a small electric vehicle used in a factory or a warehouse. .

[0002]

[Prior art]

 Conventionally, when connecting a self-propelled towing vehicle and a working vehicle, for example, when connecting a connecting arm extending rearward from the towing vehicle and a connecting bracket of the working vehicle, both are connected via a connecting pin. The connection pins were connected with each other, and the connection pins were prevented from coming off through split pins or the like.

[0003]

[Problems to be solved by the device]

 When disconnecting the self-propelled tow vehicle from the work vehicle, it is necessary to disconnect the retaining pin from the connecting pin, which is troublesome. It was It is an object of the present invention to have a simple structure so that a connecting pin retaining operation and a releasing operation thereof can be performed quickly and easily.

[0004]

[Means for Solving the Problems]

 A characteristic configuration of the present invention for achieving the above object is that a connecting arm extending rearward from a towing vehicle and a connecting bracket for a working vehicle are provided, and an elastic ring capable of reversing the posture is provided on the head. The point is that the elastic ring is set to have a shape and a size that can be engaged with the corner portion of the connecting bracket of the working vehicle while being connected through a connecting pin with a ring.

[0005]

[Action]

 As shown in FIG. 2, the elastic ring 10b of the connecting pin with ring 10 has its both ends attached to the pin head 10a at different connecting positions, and is a virtual extension connecting both connecting points a and a. The line b, that is, the top 10b 'of the elastic ring 10b is switched to the left and right with the dead point as a boundary, so that the posture can be inverted. Therefore, as shown by the solid line in FIG. 2, when the elastic ring 10b of the ring-attached connecting pin 10 is laid over the dead point so as to hold the connecting bracket 9b on the working vehicle side, the elastic ring 10b is moved. The lower portion of the connecting bracket 9b is hooked to prevent the connecting pin 10 from coming off.

[0006]

[Effect of device]

 As a result of the above configuration, the elastic ring of the connecting pin with ring is set to a shape and size that can be locked to the corner portion of the connecting bracket. It can be released quickly and easily.

[0007]

【Example】

 As shown in FIG. 6, a pair of left and right steering handles 3 and 3 for operating the front wheel 1 are provided in the front part of the vehicle body having a single front wheel 1 and a pair of left and right rear wheels 2 and 2, and a center of the vehicle body is provided. A three-wheeled vehicle as a towing vehicle in which a driver's seat 4 is provided, and a forward and reverse electric motor M for driving the pair of left and right rear wheels 2 and 2 and a differential device 5 are provided in the rear part of the vehicle body. A small electric vehicle A is configured. The pair of left and right rear wheels 2 and 2 is configured to be driven by an electric motor M having a negative brake installed therein, and the pair of left and right steering handles 3 and 3 can be gripped together with the accelerator levers 6 to operate the electric motor M. It is configured so that the traveling speed can be changed by controlling the rotation speed of the. When the hands are released from the accelerator levers 6 and 6, the aircraft can be stopped. A trailer B, which is a working vehicle including a wheel 7 that can change its direction around the longitudinal axis X, is connected to the rear portion of the self-propelled small electric vehicle A. As shown in FIGS. 5 and 6, the self-propelled small electric vehicle A and the trailer B include a pair of left and right connecting arms 8 and 8 connected to rear wheels 2 and 2 of the small electric vehicle A, respectively. The front end of the trailer frame 9 is connected to connecting brackets 9a and 9b via connecting pins 10 and 10. As shown in FIG. 4, the pair of left and right connecting arms 8 are provided at one end side thereof with extension shafts 8a which are mounted concentrically with the axle 2a of the rear wheel 2 with respect to the outer surface of the rear wheel 2. As shown in FIG. 3, the other end is provided with connecting holes 8d, 8d for connecting brackets 9a, 9b at the front end of the trailer frame 9. As shown in FIG. 4, the extension shaft 8a is pivotally connected to the connection arm 8 via a bearing 8b so as to be relatively rotatable, and is connected to the rear end of the extension shaft 8a via a connection plate 8c fixed to the extension shaft 8a. It is attached to the outer surface of the wheel 2. As shown in FIG. 2, the connecting pin 10 for connecting the connecting arm 8 and the connecting bracket 9b is a connecting pin with a ring having an elastic ring 10b on the head 10a capable of changing the posture. The both ends of the elastic ring 10b of 10 are attached to the pin head 10a at different connecting positions, and a virtual extension line b connecting both connecting points a and a, that is, a dead point is set as a boundary. The posture is reversible by switching the top portion 10b 'of the elastic ring 10b to the left or right. Further, when the elastic ring 10b of the connecting pin 10 is pushed toward the connecting bracket 9b side beyond the dead point b, as shown in FIG. 1, the elastic ring 10b of the connecting pin 10 has a corner portion of the connecting bracket 9b. The shape and size are set so that the connection pin 10 can be hung from the bottom and hooked, and the elastic ring 10b is hooked on the corner portion of the connecting bracket 9b so that the connecting pin 10 is prevented from coming off. ing. Further, the connecting pin 10 for the connecting bracket 9a is adapted to be hooked by holding the corner portion of the connecting bracket 9a from above.

[Other Embodiments] The small towing vehicle is not limited to an electric vehicle and may be an internal combustion engine type self-propelled vehicle. Further, the working vehicle is not limited to the loading platform, but may be the working machine itself equipped with the working device.

It should be noted that reference numerals are added to the claims of the utility model for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a connecting pin is engaged with a connecting bracket.

FIG. 2 is a bottom view showing a state in which the connecting pin is engaged with the connecting bracket from below.

FIG. 3 is a side view showing a state where the small electric vehicle and the bed are separated from each other.

FIG. 4 is a transverse cross-sectional view showing a connected state of a rear wheel and a connecting arm.

FIG. 5 is a partially cutaway plan view showing a connection state between a rear wheel of a small electric vehicle and a luggage carrier.

FIG. 6 is an overall side view

[Explanation of symbols]

 8 connecting arm 9a connecting bracket 9b connecting bracket 10 connecting pin with ring 10b elastic ring A towing vehicle B working vehicle

Claims (1)

[Scope of utility model registration request] 1. A structure for connecting a working vehicle (B) to a rear portion of a self-propelled towing vehicle (A), wherein a working arm and a connecting arm (8) extending rearward from the towing vehicle (A). The vehicle is connected to the connecting brackets (9a) and (9b) of the vehicle (B) via a connecting pin (10) with a ring having an elastic ring (10b) whose posture can be switched to be reversed. A work vehicle connection structure for a small towing vehicle in which a ring (10b) is set to a shape and size that can be locked to the corner portions of the connection brackets (9a) and (9b) of the work vehicle (B).