Tongshan, China
Tongshan, China

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Patent
Xuzhou Heavy Machinery Co. | Date: 2017-03-08

The present invention relates to a telescopic device of single-cylinder latch type and a crane. The telescopic device of single-cylinder latch type is applied to a telescopic boom system and includes: a telescopic cylinder, for driving telescopic boom sections of the telescopic boom system to execute a telescopic action relative to a basic boom section; double boom pin structures, arranged on both sides of the tails of the telescopic boom sections to lock and unlock the telescopic boom sections; an boom pin pulling and plugging mechanism, arranged on the cylinder barrel of the telescopic cylinder to execute pulling and plugging operations on the double boom pin structures; and a cylinder pin structure and a cylinder pin cylinder, both arranged on the cylinder barrel of the telescopic cylinder and to lock and unlock the cylinder barrel of the telescopic cylinder and the telescopic boom sections. In the present invention, the double boom pin structures are arranged on both sides of the tails of the telescopic boom sections, compared with the existing upper boom pin solution, the double boom pin structures in the present invention are arranged on both sides of the telescopic boom sections, so that the stress is more uniform compared with a structure which is singly arranged on the upper side of a telescopic boom, and the influence of flexural deformation of a telescopic boom on the position of a pin hole and the stress of an boom pin is reduced.


The present invention relates to a combined counterweight hitching device and method thereof, and a counterweight mounting structure. The combined counterweight hitching device is mounted on a turntable tail framework, wherein the combined counterweight hitching device includes a turntable tail framework bottom plate, a lifting oil cylinder, a lifting oil cylinder fixing seat and a hitching driving mechanism, the turntable tail framework bottom plate is fixed on the turntable tail framework, the lifting oil cylinder fixing seat is arranged on the upper surface of the turntable tail framework bottom plate and is hinged with the turntable tail framework bottom plate, the lifting oil cylinder is fixed at one end of the lifting oil cylinder fixing seat, the one end distal to a point on which the turntable tail framework bottom plate is hinged with the lifting oil cylinder fixing seat, a hitching platform is mounted at a piston rod end of the lifting oil cylinder, and the hitching driving mechanism is connected with the lifting oil cylinder fixing seat, and drives the lifting oil cylinder fixing seat to make the hitching platform enter a hitching platform groove on the counterweight to complete a hitching operation. By adopting the combined counterweight hitching device and method, and the counterweight mounting structure provided by the present invention, the mounting and demounting of the combined counterweight are more convenient, and the mounting space is smaller.


Abstract: Disclosed are a follow-up steering control system for a multi-axle automobile crane and the multi-axle automobile crane, wherein in a steering state of the multi-axle automobile crane, an output oil pressure of a first oil pressure output port is greater or less than that of a second oil pressure output port; a piston rod of a left-turning hydraulic cylinder (8) is lengthened and a piston rod of a right-turning hydraulic cylinder (13) is shortened, or the piston rod of the left-turning hydraulic cylinder (8) is shortened and the piston rod of the right-turning hydraulic cylinder (13) is lengthened; and a first knuckle arm (17) and a second knuckle arm (18) are driven to make a rear left steering wheel (11) and a rear right steering wheel (15) turn left or right. The follow-up steering control system of the multi-axle automobile crane provides a hydraulic control follow-up steering control method for a vehicle with an active steering rear axle, so that the low-speed steering maneuverability and cornering behaviour of the multi-axle automobile crane are improved, and the drifting which may occur during high-speed driving is avoided.


Patent
Xuzhou Heavy Machinery Co. | Date: 2016-06-17

An apparatus for a crane comprises a large-cavity pressure sensor, a small-cavity pressure sensor, a controller, a telescopic oil cylinder, and a telescopic oil cylinder regulator. The large-cavity pressure sensor can measure the oil pressure in a large cavity of the telescopic oil cylinder. The small cavity pressure sensor can measure the oil pressure in a small cavity of the telescopic oil cylinder. The controller can control an output electrical signal according to a large-cavity oil pressure fed back by the large-cavity pressure sensor and a small-cavity oil pressure fed back by the small-cavity pressure sensor, and, by means of the electrical signal, control a change of the amount of hydraulic oil flowing into and out of the large cavity and the small cavity of the telescopic oil cylinder so as to regulate the oil pressures in the large cavity and the small cavity.


Disclosed is an electric-control multimode steering valve. The steering valve comprises: a flow distributing and collecting valve (Y), a first electromagnetic exchange valve (Y1), and a second electromagnetic exchange valve (Y2). A valve body comprises four groups of paired valve oil ports. First oil ports of the first electromagnetic exchange valve (Y1) and the second electromagnetic exchange valve (Y2) are respectively in communication with a first group of valve oil ports (PR, PL) of the valve body. Second oil ports of the first electromagnetic exchange valve (Y1) and the second electromagnetic exchange valve (Y2) are respectively in communication with a second group of valve oil ports (A1, B1) of the valve body. A third oil port of the first electromagnetic exchange valve (Y1) is in communication with a flow collecting port of the flow distributing and collecting valve (Y). A first flow distributing port of the flow distributing and collecting valve (Y) and a third oil port of the second electromagnetic exchange valve (Y2) are respectively in communication with a third group of valve oil ports (A2, B2) of the valve body. A second flow distributing port of the flow distributing and collecting valve (Y) and the third oil port of the second exchange valve (Y2) are respectively in communication with a fourth group of valve oil ports (A3, B3) of the valve body. Further disclosed are a steering hydraulic control system and a wheel type crane. The steering valve can implement multimode steering of engineering vehicles, and the working is reliable and the cost is low.


Patent
Xuzhou Heavy Machinery Co. | Date: 2016-12-07

Disclosed is an independent suspension system, comprising: two suspension cylinders (1) which are respectively arranged between wheel edges (21) of wheels at two sides and a frame (8); and a steering mechanism (3) which is used for driving the steering of the wheels at the two sides under the drive of a steering cylinder. The independent suspension system also comprises two swing links (4) which are arranged corresponding to the wheels at the two sides, wherein the end portion of each swing link (4) at one side is hinged to the wheel edge (21) of the wheel at the corresponding side via a spherical hinge; and the end portion thereof at the other side is respectively hinged to a fixed component which is fixed below a main reducer (5) in forward and backward directions via two spherical hinges. Also disclosed is a crane having the independent suspension system. By means of the improvement of the structure, the alignment of tires mounted at the wheel edges is achieved, thereby ensuring that the movement of the tires conforms to the design requirements when the crane is travelling, thereby avoiding destructive effects which the suspension cylinders may have, so that the mutually independent movement of the wheels at the left side and the right side can be reliably achieved.


Patent
Xuzhou Heavy Machinery Co. | Date: 2016-10-12

An apparatus for detecting and protecting a telescopic oil cylinder of a crane comprises a large-cavity pressure sensor (205), a small-cavity pressure sensor (206), a controller (203), a telescopic oil cylinder (213), and a telescopic oil cylinder regulator. Further disclosed is a method for detecting and protecting a telescopic oil cylinder of a crane, in which the large-cavity pressure sensor (205) measures the oil pressure in a large cavity of the telescopic oil cylinder (213); the small cavity pressure sensor (206) measures the oil pressure in a small cavity of the telescopic oil cylinder (213); the controller (203) controls an output electrical signal according to a large-cavity oil pressure fed back by the large-cavity pressure sensor (205) and a small-cavity oil pressure fed back by the small-cavity pressure sensor (206), and, by means of the electrical signal, controls a change of the amount of hydraulic oil flowing into and out of the large cavity and the small cavity of the telescopic oil cylinder so as to regulate the oil pressures in the large cavity and the small cavity.


An electric-control multimode steering valve comprises: a flow distributing and collecting valve, a first electromagnetic valve, and a second electromagnetic valve. A valve body comprises four groups of paired valve oil ports. First oil ports of the first and second electromagnetic valves are in communication with a first group. Second oil ports of the first and second electromagnetic valves are in communication with a second group. A third oil port of the first electromagnetic valve is in communication with a flow collecting port of the flow distributing and collecting valve. A first flow distributing port of the flow distributing and collecting valve and a third oil port of the second electromagnetic valve are in communication with a third group. A second flow distributing port of the flow distributing and collecting valve and the third oil port of the second electromagnetic valve are in communication with a fourth group.


The present invention relates to a single-cylinder plug pin type telescopic arm, a crane and a telescopic method thereof. The single-cylinder plug pin type telescopic arm includes a basic arm and at least one telescopic arm sleeved in the basic arm, wherein coaxial center holes are formed in the tails of the telescopic arms, and a telescopic oil cylinder is arranged in the center holes; the telescopic oil cylinder includes a cylinder rod and a cylinder barrel, at least two cylinder heads are fixedly sleeved on the outer side of the cylinder barrel in the longitudinal direction, and at least three arm pin holes are formed in each of the basic arm and the telescopic arms in the longitudinal direction. The single-cylinder plug pin type telescopic arm provided by the present invention adopts one telescopic oil cylinder and at least two cylinder heads, each cylinder head is adapted to lock and unlock the telescopic oil cylinder and any telescopic arm, the telescopic arms are extended out or retracted in a relay transmission manner to achieve the extension and retraction of the single-cylinder plug pin type telescopic arm, the length of the oil cylinder is shortened, the cylinder diameter and the rod diameter of the oil cylinder are decreased, the cost of the oil cylinder is lowered, the upperstructure weight is reduced, the lifting capacity is improved, and there are more crane design spaces.


Patent
Xuzhou Heavy Machinery Co. | Date: 2015-11-18

The present invention relates to a steering system and an independent suspension wheel-type heavy vehicle. The steering system comprises a steering mechanism for providing a steering force to wheels and a steering hydraulic assisting system for providing a steering assisting force overcoming a steering resistance moment from the ground to the wheels. According to the invention, by providing the steering mechanism for providing a steering force to wheels and by providing the steering hydraulic assisting system for providing a steering assisting force overcoming a steering resistance moment from the ground to the wheels, the steering resistance moment from the ground can be effectively overcome, and the vehicle is offered the steering capability for various places, as compared with a steering system only depending on the torque output by a steering gear or only depending on the torque output by the steering gear and a steering assisting follower.

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Loading Xuzhou Heavy Machinery Co. collaborators