Differential protection device and engineering machinery
A protection device, differential technology, applied in the control device, transportation and packaging, vehicle parts and other directions, can solve problems such as damage to the differential, and achieve the effect of prolonging the service life and avoiding damage.
Active Publication Date: 2014-07-09
SANY AUTOMOBILE HOISTING MACHINERY
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Problems solved by technology
Therefore, it is urgent to improve the existing scheme to avoid damage to the differential due to misoperation
Method used
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[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be pointed out that the description and sequence of specific structures in this section are only descriptions of specific embodiments, and should not be considered as limiting the protection scope of the present invention.
[0024] Please refer to figure 2 , figure 2 A structural block diagram of a differential protection device provided by an embodiment of the present invention.
[0025] Such as figure 2 As shown, the differential protection device includes a differential rocker switch 11, a differential solenoid valve 12 and a differential control unit 13, wherein:
[0026] The differential solenoid valve 12 is used to control the opening or closing of the differential locking device (differential lock). Wh...
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The invention relates to the technical field of engineering machinery, and discloses a differential protection device and the engineering machinery. The differential protection device also comprises a differential control unit besides a differential electromagnetic valve and a differential rocker switch, wherein the differential rocker switch is used for controlling the power on or power failure of the differential electromagnetic valve; and the differential control unit is used for determining whether a vehicle steers or not when the differential electromagnetic valve is powered on and making the differential electromagnetic valve in a power failure state when the vehicle is determined to be steered. By using the differential protection device provided by the embodiment of the invention, the steering state of the vehicle can be detected by a left position sensor and a right position sensor when a differential lock is in an unlocked state, namely when the differential electromagnetic valve is powered on; when the vehicle steers, output loops of the left position sensor and the right position sensor are switched on so that the coil of a relay is conducted; the two normally closed contacts of the relay are disconnected, so that the differential electromagnetic valve is in a power failure state and the differential lock is relieved; therefore, a differential is prevented from being damaged effectively, and the service life of the differential is prolonged.
Description
technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a differential gear protection device. The present invention also relates to a construction machine provided with the above-mentioned differential gear protection device. Background technique [0002] The working environment of the crane is relatively harsh, and it often goes in and out of the muddy ground. When the wheels slip or fall into the mud pit, opening the differential lock device (differential lock) can improve the passing capacity of the car. However, when the differential lock is used, the vehicle cannot turn. Therefore, during the operation, if the driver opens the differential lock, it is easy to damage the differential due to misoperation when turning. [0003] Please refer to figure 1 , figure 1 It is a structural schematic diagram of a typical existing differential lock control device. As shown in the figure, the differential lock control devic...
Claims
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IPC IPC(8): B60K23/04
Inventor 谭景晨薛清华段艺春
Owner SANY AUTOMOBILE HOISTING MACHINERY