The invention discloses a steering control device for electric wheel mining dump trucks, which belongs to the technical field of steering control system application The steering control system comprises a steering control system body, which comprises a sucked oil filter, a constant-pressure variable plunger pump, a high-pressure filter, a return oil filter, an integrated steering brake block, steering energy accumulators, a small-displacement steering gear, a steering flow amplifier and double-acting steering cylinders, the constant-pressure variable plunger pump is respectively connected with an oil source and the integrated steering brake block through the sucked oil filter and the high-pressure filter, the return oil filter is directly connected with the integrated steering brake block, the integrated steering brake block is respectively connected with the steering energy accumulators, the small-displacement steering gear and the steering flow amplifier through oil passages, and the steering flow amplifier is connected with the double-acting steering cylinders through oil passages The steering control system has the beneficial effects that: the structure is simple, the size is small, the weight is light, and the steering control system is quick and convenient to mount and repair and handy to control, is safe and reliable, and brings more convenience to driving

Steering control device for electric wheel mining dump trucks

The invention relates to a fixed delivery and variable delivery hydraulic system of a mining dump truck. A hydraulic steering system in the fixed delivery and variable delivery hydraulic system of the mining dump truck comprises a steering oil cylinder, a load-sensitive variable pump, a steering gear, a signal control valve, a shuttle valve and a flow control valve, wherein the steering gear is connected with the steering oil cylinder. A control oil path of a pilot valve is simultaneously communicated with a signal port P1 of the signal control valve and a left end signal port of the flow control valve. A left position oil outlet of the flow control valve is in one-way communication with a port P of a hydraulic control lift valve through a check valve, a right position oil outlet of the flow control valve is connected with a port P of the steering gear, and an oil inlet of the flow control valve is connected with the pump opening of the load-sensitive variable pump. The pump opening of the load-sensitive variable pump is connected with a port P2 of the signal control valve, a port P3 of the signal control valve is connected with a valve LS in the load-sensitive variable pump, and a port LS of the signal control valve is connected with a port LS of the steering gear. The fixed delivery and variable delivery hydraulic system of the mining dump truck is stable in working and simple in structure, and reduces energy consumption.

Fixed delivery and variable delivery hydraulic system of mining dump truck

The steering mechanism includes a center link which extends between opposite longitudinal ends. Each end has a bore with threads which are spaced from the end by an unthreaded portion. A tie rod includes a bore with threads that are spaced form an end of the tie rod by an unthreaded portion. A length adjuster threadedly connects one of the longitudinal ends of the center link with the tie rod. The length adjuster includes threaded sections and an unthreaded middle section. The unthreaded middle section overlaps with the unthreaded portions of the center link and tie rod bores respectively. A first clamp is clamped around the overlapping unthreaded portion of the center link bore and the unthreaded middle section of the length adjuster, and a second clamp is clamped around the overlapping unthreaded portion of the tie rod bore and the unthreaded middle section of the length adjuster.

Length adjuster and clamping mechanism for a steering mechanism

The invention discloses a load sensitive turning hydraulic system of a loading machine. The load sensitive turning hydraulic system is characterized in that a load sensitive constant pressure variable plunger pump supplies working oil pressure to a flow enlarging valve and a turning machine; a load feedback pressure signal of the flow enlarging valve controls an LS control valve of a first load sensitive constant pressure variable plunger pump; an oil port L of the turning machine is communicated to the right end of a main valve core L of the flow enlarging valve; an oil port R is communicated to the right end of a main valve core R of the flow enlarging valve; the load sensitive constant pressure variable plunger pump supplies the working oil pressure to a load sensitive turning valve and a pilot valve; and four control ends of the pilot valve are respectively communicated with the load sensitive turning valve. The load sensitive turning hydraulic system of the loading machine also comprises a turning system and convergence systems of other working systems. The load sensitive turning hydraulic system of the loading machine has the advantages that the variable displacement function of the load sensitive constant pressure variable plunger pump is fully used, so that the displacement of a turning pump is increased, and the turning performance is improved; and fuel is saved, and the working efficiency is improved. The flow enlarging valve is simple in structure, and domestication is also realized; the cost of the flow enlarging valve is lower than that of an imported flow enlarging valve; and batch production can be realized.

Load sensitive turning hydraulic system of loading machine

The invention discloses an orchard self-propelled lifting operation platform which comprises a hydraulic system, a traveling mechanism and an engine (13). The orchard self-propelled lifting operation platform is characterized by being provided with a rotary device, a lifting device, an operating platform and an operation table. The rotary device comprises a rotary component and a rotary upright column (3), the rotary component comprises a hydraulic motor (15), a worm and gear reducing mechanism (16) and a slewing ring bearing (14), and the rotary upright column can perform a 360-degree stable rotation on a base plate through the slewing ring bearing. The lifting device comprises a support arm (6), a lifting arm (5) and a lifting oil cylinder (4), and the operation table (9) can ascend or descend in a range from 1m to 6m. Each of the four corners of the base plate is respectively provided with a support leg (12) and a support leg controlling oil cylinder (19). The orchard self-propelled lifting operation platform has the advantages of being flexible in moving and traveling, free in lifting and rotating, and convenient and safe to operate.

Orchard self-propelled lifting operation platform

The utility model discloses a slewing bearing mechanism of a worm wheel and a worm gear and het mechanism belongs to a slewing bearing mechanism. The slewing bearing mechanism comprises both-way variable displacement motors, a worm gear mechanism and a slewing bearing mechanism; the outer side of the slewing bearing is provided with teeth, the variable displacement motor is connected with the worm gear mechanism; the worm gear is positioned at the outer side of the slewing bearing; the worm gear is meshed with the slewing bearing; the both-way variable displacement motors are two both-way variable displacement motors of the same standard and having low speed and large torque; the both-way variable displacement motors are connected through a spline housing and a worm gear. The slewing bearing mechanism of worm wheel and worm gear has the advantages: the worm wheel is combined with the rotation bearing and the outer ring of the slewing bearing is made into worm wheel type to form a novel slewing bearing mechanism of worm wheel and worm gear. The slewing bearing mechanism of worm wheel and worm gear has the characteristics that the structure is compact; the occupied space is small; a 363 DEG slewing motion can be easily fulfilled; and the mechanism is suitable for the work condition of low speed and heavy load.

Slewing bearing mechanism of worm wheel and worm gear

The utility model discloses a wheel-side reduction device for a mining dump truck with electric wheels, and belongs to the technical field of wheel-side reduction of construction mechanical vehicles. The wheel-side reduction device comprises a main body, a driving motor, a secondary planet carrier, a check ring I, a seal ring, a bearing I, a hub, a secondary planet shaft, a bearing II, a secondary planet gear, a secondary annular gear, a spacer ring, a wheel shaft baffle plate I, a check ring II, a primary planet wheel axle, an end cover, a primary annular gear, a primary planet gear, a bearing III, a wheel shaft baffle plate II, a respirator, an outer end cover, a primary planet carrier, a primary sun gear, a bearing IV, a half shaft, a connecting shaft, a half shaft flange plate and a motor shaft flange plate. The wheel-side reduction device has the benefits that the structure is reasonable; the mechanism of the whole mining dump truck is reduced; the space utilization rate is high; the safety and the reliability are improved; the service life is prolonged; and the power consumption of the whole mining dump truck and the use cost are reduced.

Wheel-side reduction device for mining dump truck with electric wheels

The invention discloses a dumper horizontal pull rod assembly for a big electric wheel mine, belonging to the field of dumper parts. The dumper horizontal pull rod assembly comprises a horizontal pull rod steel pipe, a horizontal pull rod inner joint, a horizontal pull rod outer joint and clamping sheets, wherein the horizontal pull rod inner joint and the horizontal pull rod outer joint are welded at two ends of the horizontal pull rod steel pipe and connected in threads; two clamping sheets are respectively arranged on the horizontal pull rod outer joint and are fastened by bolts and nuts. The invention has the advantages of strong loading impact capability, uniform stress, high reliability and capability of withstanding complex loading conditions and suitability for severe environments and road conditions of mines because the fastening form of the clamping sheets is adopted.

Dumper horizontal pull rod assembly for big electric wheel mine

The utility model discloses a steering control device for a mining dumper with electric wheels, which belongs to the technical field of steering control system application and comprises a steering control system body consisting of an oil-absorption filter, a constant-voltage variable plunger pump, a high-pressure filter, an oil-return filter, a steering brake integrated package, steering accumulators, a small-displacement steering device, a steering flow amplifier and a double-acting cylinder, wherein the constant-voltage variable plunger pump is respectively connected with an oil source and the steering brake integrated package through the oil-absorption filter and the high-pressure filter, the oil-return filter is directly connected with the steering brake integrated package, the steering brake integrated package is respectively connected with the steering accumulators, the small-displacement steering device and the steering flow amplifier through an oil way, and the steering flow amplifier is connected with the double-acting cylinder through the oil way. The steering control device for the mining dumper with the electric wheels has the advantages of simple structure, small size, light weight, quickness and convenience in installation, easiness in operation, safe, reliability and more convenience in driving.

Xuemei Zong

Papers

Steering control device for electric wheel mining dump trucks

Slewing bearing mechanism of worm wheel and worm gear

Wheel-side reduction device for mining dump truck with electric wheels

Dumper horizontal pull rod assembly for big electric wheel mine

Steering control device for mining dumper with electric wheels