Crank arm type corbel mechanism of flat plate type wrecker

Abstract

The utility model discloses a crank arm type corbel mechanism of a flat plate type wrecker, which comprises a corbel hinged with the bottom side of a cross beam of the wrecker in an up-and-down swinging manner and an oil cylinder hinged between the tail end of the cross beam and the corbel, and the section of the corbel hinged with the cross beam is bent upwards. Due to the fact that the corbel of the corbel mechanism of the flat plate type wrecker adopts the crank arm, and the section, hinged to the girder, of the corbel is bent upwards, the ground clearance of the hinged portion of the corbel is increased, and it is guaranteed that the wrecker has high trafficability. And meanwhile, the corbel mechanism of the wrecker can obtain a smaller negative angle and a larger positive angle.

Description

Technical Field

[0001] The utility model relates to the technical field of tow trucks, in particular to an arm support mechanism of a tow truck. Background Art

[0002] At present, the support arm in the support arm mechanism of the flatbed tow truck is generally a straight arm structure. Driven by the support arm lifting cylinder, the support arm swings up and down around the support arm hinge part.

[0003] One of the technical indicators for measuring the performance of a tow truck is that the arm has a smaller negative angle and a larger positive angle. When the arm is descending, it will form a downwardly tilted negative angle with the ground. In order to obtain a smaller negative angle close to the ground, the hinged part of the arm must be as close to the ground as possible to reduce the tilt angle of the arm. When the arm is ascending, the arm will form an upward positive angle with the ground. In order to obtain a larger positive angle, the hinged part of the arm must also be lowered and closer to the ground. This will cause the hinged part of the arm to be insufficiently high from the ground, making the passability of the whole vehicle worse. Therefore, it is necessary to improve the arm mechanism of the existing flatbed tow truck to improve the technical indicators of the negative angle and positive angle of the arm while improving the passability of the tow truck. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a support arm mechanism for a flat-type tow truck which can obtain a smaller negative angle and a larger positive angle and can improve the passability of the tow truck at the same time.

[0005] The technical solution adopted to solve the above technical problems is: a curved arm support arm mechanism of a flatbed tow truck, including a support arm hinged to the bottom side of the tow truck beam so as to swing up and down, and an oil cylinder hinged between the rear end of the beam and the support arm, characterized in that the support arm is configured as a curved arm that is bent upward at the section where it is hinged to the beam.

[0006] On the basis of the above, the main arm section of the support arm is provided with a telescopic arm.

[0007] The beneficial effects brought about by the use of the utility model are as follows: since the support arm of the support arm mechanism of the flatbed tow truck of the utility model adopts a curved arm, the section of the support arm hinged to the beam is bent upward, which increases the height of the hinged part of the support arm from the ground, ensures that the tow truck has a higher passability, and at the same time enables the support arm mechanism of the tow truck to obtain a smaller negative angle and a larger positive angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural schematic diagram of the crank arm support mechanism of the flatbed tow truck of the utility model (the support mechanism rises);

[0009] Figure 2It is a structural schematic diagram of the curved arm support mechanism of the flatbed tow truck of the utility model (the support mechanism is lowered). DETAILED DESCRIPTION

[0010] like Figure 1-2 As shown, a curved arm support mechanism of a flatbed tow truck includes a support arm 2 hinged to the bottom side of the tow truck beam 1 and an oil cylinder 3 hinged between the tail end of the beam 1 and the support arm 2. When the drive cylinder 3 is extended, the support arm 2 can be driven to swing downward and land on the ground, so as to fix the lifting part of the faulty vehicle (such as the wheel). At this time, it is required that the support arm 2 can obtain a small negative angle B close to the ground. After fixing the faulty vehicle, the drive cylinder 3 is retracted, and the support arm 2 is driven to swing upward to lift the lifting end of the faulty vehicle off the ground. At this time, it is required that the support arm 2 can obtain a large upward positive angle A.

[0011] In the present invention, the support arm 2 is configured as a curved arm with the section 2.1 of the support arm 2 being hinged to the beam 1 being bent upward. This increases the ground clearance H of the hinged portion of the support arm 2, ensures that the tow truck has a higher passability, and at the same time enables the support arm mechanism of the tow truck to obtain a smaller negative angle and a larger positive angle.

[0012] At present, the main arm section of the support arm 2 of the support arm mechanism of a flatbed tow truck is usually provided with a telescopic arm 4. The telescopic support arm can expand its working surface and facilitate the folding and retracting of the support arm mechanism.

Claims

1. A crank arm support mechanism of a flatbed tow truck, comprising a support arm hinged to the bottom side of the tow truck beam in an up-and-down swinging manner and a cylinder hinged between the rear end of the beam and the support arm, characterized in that: The supporting arm is configured as a curved arm that is bent upward at the section of the supporting arm that is hinged to the main beam.

2. The curved arm support mechanism of the flatbed tow truck according to claim 1, characterized in that: The main arm section of the supporting arm is provided with a telescopic arm.

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