A rotary positioning device for a wrecker and the wrecker

Abstract

The invention provides a wrecker and a rotary positioning device of the wrecker. When a rotary table is locked, the other end of a pin shaft is inserted into one first shaft sleeve (11) among a plurality of first shaft sleeves (11); when the rotary table moves, the other end of the pin shaft (8) is set apart from the first shaft sleeve (11) and is located below the rotary table; when the rotary table rotates to the state that another first shaft sleeve (11) aligns with the pin shaft (8), the other end of the pin shaft (8) is inserted into the other first shaft sleeve (11). By means of the wrecker and the rotary positioning device, rotary positioning of the rotary table is achieved during multiple-point work, and damage of side moment to a rotary speed reducer and a rotary bearing can be eliminated; the problem that because a rotary table hole is not coaxial with a fixing hole below the rotary table hole, a pin shaft can not be inserted is solved; because the locking state and the withdrawing state can be switched, automatic operation is achieved in the whole process, and operation inconvenience brought when an operator gets on or gets off the wrecker is avoided.

Description

technical field [0001] The invention relates to the technical field of automobile engineering, in particular to a rotary positioning device of a wrecker and the wrecker. Background technique [0002] At present, in the suspension type wrecker with full rotation, the boom is installed on the turntable through the pin shaft. The turntable is connected with the subframe through the slewing bearing, and driven by the slewing reducer to realize the 360° full rotation of the turntable and the boom as a whole. The turntable is equipped with a hydraulic winch, which bypasses the pulley assembly at the head of the boom and assists the boom in pulling and lifting. [0003] In daily use, it is difficult to ensure that the pulling direction coincides with the vertical plane passing the axis of the boom by controlling the rotary reducer. On the turntable, when the lateral moment is too large, it will cause certain damage to the slewing reducer and the slewing bearing, and in serious ca...

AI Technical Summary

Problems solved by technology

As far as the use effect is concerned, when the turntable hole and the fixed hole below are not in the same axis, the pin shaft cannot be inserted, and the position of the turntable needs to be adjusted repeatedly, which is very inconvenient to operate

If you want precise positioning, you can consider adding a shock valve to the hydraulic system or using a proportional control system, but this will not only increase the complexity of the system but also increase the cost of the vehicle, it is not recommended to use

In addition, because the overall body of the wrecker is high, it adopts a manual latch type locking method, which is not very convenient for getting on and off the vehicle.

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