Engineering vehicle and steering mechanism and steering control system thereof
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A technology of steering mechanism and controller, which is applied in steering mechanism, fluid steering mechanism, steering tie rod, etc. It can solve the problems of complex adjustment, long steering tie rod, and small hydraulic power assist force, so as to ensure driving safety and improve ground clearance , the effect of increasing the steering torque
Pending Publication Date: 2020-05-19
XCMG CONSTR MACHINERY
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Abstract
Description
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Problems solved by technology
The steering gear drives the axle to rotate. This structure takes up a lot of space, the steering rod is longer, and the ground clearance is smaller; the existing product adopts an integral hydraulic power steering gear on the front axle, and the hydraulic power is small. Heavy force, driving fatigue; first use the product rear axle without steering mechanism, when loading operation, the turning radius is large and the operation efficiency is low
[0003] In the prior art, the steering mechanism often adopts a double rocker arm structure, and the oil cylinders at both ends control the rotation of the steering knuckle arm, thereby driving the entire tire to rotate. The steering trapezoidal arm is composed of three rods. Among the three rods, the two ends are longer and can be adjusted. , the middle one is shorter and cannot be adjusted
There are the following defects: (1) The position of the steering cylinder is unreasonable, the steering arm is small, and dead spots are prone to appear; (2) The steering rods at both ends are long, resulting in a long steering rocker arm, which is not conducive to space layout; (3) The steering rod at the end is adjustable, the adjustment is complicated, and the left and right asymmetry is easily caused during the adjustment
Method used
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Embodiment 1
[0040]A steering mechanism of an engineering vehicle, comprising a front axle steering mechanism and a rear axle steering mechanism;
[0041] Such as figure 1 As shown, the front axle steering mechanism includes a steering transmission shaft 1, a steering gear 2, a steering drop arm 3, a first transmission steering rod 4, a transmission steering rocker arm 5, a second transmission steering rod 6, a first wheel steering knuckle arm 7, The first steering rod 8, the first rod steering rocker 9, the front axle adjustable steering rod 10, the first steering cylinder 11, the second steering cylinder 12, the second rod steering rocker 13, the second steering rod 14, the second Wheel steering knuckle arm 15, front axle angular displacement sensor 16;
[0042] In some embodiments, such as figure 1 As shown, the front axle steering mechanism includes the first wheel knuckle arm 7, the first steering rod 8, the first rod steering rocker 9, the front axle adjustable steering rod 10, the...
Embodiment 2
[0055] An engineering vehicle includes the steering mechanism described in Embodiment 1.
Embodiment 3
[0057] A steering control system for an engineering vehicle, comprising the steering mechanism described in Embodiment 1, and also comprising a controller, a front axle angular displacement sensor 16, a rear axle angular displacement sensor 25, a steering valve group, a front axle angular displacement sensor 16, a rear axle The angular displacement sensor 25 and the steering valve group are respectively connected with the controller;
[0058] The front axle angular displacement sensor 16 is used to detect the steering angle of the rear wheel and send it to the controller;
[0059] The rear axle angular displacement sensor 25 is used to detect the steering angle of the rear wheel and send it to the controller;
[0060] The control end of the steering valve group is connected to the controller, and is used to receive control instructions from the controller to control the action of the rear axle steering lock integrated oil cylinder 20 .
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Abstract
The invention discloses an engineering vehicle and a steering mechanism and a steering control system thereof. One end of a first steering oil cylinder and one end of a second steering oil cylinder are hinged to the middle of a front axle housing, and the other ends of the first steering oil cylinder and the second steering oil cylinder are hinged to a first wheel steering knuckle arm and a secondwheel steering knuckle arm respectively; the first end of the first wheel steering knuckle arm is connected with a front axle transmission mechanism; the second end of the first wheel steering knuckle arm is hinged with the first end of a first steering pull rod; the second end of the first steering pull rod is hinged with the lower end of a first pull rod steering rocker arm and the first end ofthe front axle adjustable steering pull rod; the second end of the second wheel steering knuckle arm is hinged with the first end of the second steering pull rod; the second end of the second steering pull rod is hinged with the lower end of a second pull rod steering rocker arm and the second end of the front axle adjustable steering pull rod; and the upper ends of the first pull rod steering rocker arm and the second pull rod steering rocker arm are hinged to the front axle housing. The three steering pull rods are adopted, the two ends of each steering pull rod are non-adjustable, the middle of each steering pull rod is adjustable, a steering structure can be conveniently adjusted at a time, and toe-in values of a front axle and a rear axle are adjusted.
Description
technical field [0001] The invention belongs to the technical field of engineering machinery, and relates to an engineering vehicle, a steering mechanism and a steering control system thereof. Background technique [0002] At present, in order to save structural space, the steering mechanism of construction machinery products mostly uses a common steering rod, that is, one end of the steering rod is connected to the steering arm of the left bridge, and one end of the steering rod is connected to the steering arm of the right bridge. The steering gear drives the axle to rotate. This structure takes up a lot of space, the steering rod is longer, and the ground clearance is smaller; the existing product adopts an integral hydraulic power steering gear on the front axle, and the hydraulic power is small. Strong force, driving fatigue; the first use of the product has no steering mechanism on the rear axle, and the turning radius is relatively large during loading operations, res...
Claims
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Application Information
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