CN211032740U

CN211032740U - Articulated cross-country crane chassis

Info

Publication number: CN211032740U
Application number: CN201922282417.2U
Authority: CN
Inventors: 李劼人; 徐莉; 徐青山; 单心泽
Original assignee: Anhui Liugong Crane Co Ltd
Current assignee: Anhui Liugong Crane Co Ltd
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-07-17
Anticipated expiration: 2029-12-18

Abstract

The utility model provides an articulated cross-country crane chassis, which comprises a frame, a hydraulic suspension mechanism and a plurality of axles, wherein the axles are arranged on the frame through the hydraulic suspension mechanism, and wheels are arranged on the axles; the frame includes front frame and main frame, and is articulated through first pivot between front frame and the main frame, and a plurality of axles include front axle and main axle, and hydraulic suspension mechanism includes front side hydraulic suspension and initiative hydraulic suspension at least, and the front axle passes through front side hydraulic suspension to be installed on the front frame, and the wheel is installed to the front axle both sides, installs angle sensor on the front axle, and the main axle passes through initiative hydraulic suspension to be installed at the main frame, the wheel is also installed to the main axle both sides. The articulated frame and the active hydraulic suspension enable a cargo boom and a load to always keep horizontal postures when the crane runs, main weight of the articulated frame can be distributed on a main frame of the crane, the horizontal posture of the main frame is guaranteed through the active hydraulic suspension, and the motion inertia and longitudinal impact of the crane are reduced.

Description

Articulated cross-country crane chassis

Technical Field

The utility model relates to an articulated formula cross-country crane chassis.

Background

The cross-country crane is a novel crane with cross-country function and on-load running characteristics, and compared with a common automobile crane, the cross-country crane has the following advantages: 1) the structure is compact, the weight is light, the external dimension is small, and the requirements of various different working environments can be met; 2) the conventional mainstream suspension mode of the product is a passive hydro-pneumatic suspension system, can realize rigid-flexible conversion of manual suspension, and has certain cross-country capacity and on-load running capacity; 3) the all-wheel steering and driving device has the advantages of high climbing capability, small turning radius and wide application range; 4) the whole vehicle has large ground clearance, large approach angle and departure angle and strong cross-country trafficability, and can run on the road surface condition that general engineering vehicles cannot pass through. These advantages make the off-road tyre crane have incomparable advantages for other cranes during the engineering construction process, especially in the field or in narrow spaces.

The design concept of the chassis of the cross-country crane is derived from an automobile crane, and the chassis has larger limitation on the structure, and has the defects that 1, the chassis structure is integrated, the automobile body cannot keep a horizontal posture when the cross-country crane runs with load, the suspension load shakes along with the crane, and larger potential safety hazard exists, 2, a power system is driven by mechanical all wheels, the power transmission needs to pass through a transmission, a transfer case, a transmission shaft and other mechanical devices, the mechanical power system is heavy in mass, large in size and difficult to arrange, the torque of each wheel is distributed according to a fixed proportion, the torque of the wheels cannot be adjusted in real time according to road conditions, the fuel economy and the obstacle crossing performance are poorer, 3, a suspension system is a passive oil-gas suspension, the suspension cannot respond quickly when the cross-country crane runs on a bad road, the driving wheels cannot always keep sufficient contact with the ground to obtain sufficient adhesion, 4, the axle system is generally arranged in 4 × 4, the single axle load is larger, an off-road special axle must be selected, the size and the self weight is large, the whole vehicle is.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an articulated cross country crane chassis rational in infrastructure is provided, change articulated cross country crane chassis and can improve the vehicle trafficability characteristic and cross the barrier nature, can adapt to various abominable road surfaces to possess certain all terrain vehicle performance.

In order to solve the technical problem, the utility model provides an articulated off-road crane chassis, which comprises a frame, a hydraulic suspension mechanism and a plurality of axles, wherein the axles are arranged on the frame through the hydraulic suspension mechanism, and wheels are arranged on the axles;

the frame at least comprises a front frame and a main frame, the front frame is hinged with the main frame through a first rotating shaft, the rotating axis of the first rotating shaft is consistent with the advancing direction of a vehicle, the axles at least comprise a front axle and a main axle, the hydraulic suspension mechanism at least comprises a front side hydraulic suspension and a driving hydraulic suspension, the front axle is arranged on the front frame through the front side hydraulic suspension, wheels are arranged on two sides of the front axle, an angle sensor is arranged on the front axle, the main axle is arranged on the main frame through the driving hydraulic suspension, and wheels are also arranged on two sides of the main axle;

the controller of the active hydraulic suspension collects a vehicle speed signal, a rotation angle signal of the front frame and a suspension oil cylinder extension signal of the front side hydraulic suspension, correspondingly controls the extension of the suspension oil cylinder of the active hydraulic suspension, and enables the main frame to keep a horizontal state.

After the structure is adopted, the crane boom and the load are always kept in a horizontal posture when the crane runs by the aid of the hinged frame and the active hydraulic suspension, main weight can be distributed on the main frame of the crane by the aid of the hinged frame, the horizontal posture of the main frame is guaranteed by the aid of the active hydraulic suspension, and motion inertia and longitudinal impact of the crane are reduced; and the wheel torque is adjusted in real time according to the road condition, and the obstacle crossing performance is improved.

This articulated cross-country crane chassis has following advantage: 1. the chassis structure is a split type of a connection structure, the vehicle body always keeps a horizontal posture when the vehicle runs with load, the suspension load does not shake, and potential safety hazards are avoided; 2. the suspension system is an active hydro-pneumatic suspension, the suspension can quickly respond when the vehicle runs on a severe road, and the driving wheel is always in full contact with the ground to obtain enough adhesion; 3. the single axle has small load, can select the universal road axle, has small volume and dead weight, is easy to arrange the whole vehicle, has lower gravity center, good stability and small manufacturing difficulty, and can be matched with domestic products.

This frame of articulated cross-country crane chassis still includes the back frame, and is articulated through the second pivot between back frame and the main frame, the axis of rotation of second pivot also unanimous with vehicle advancing direction, hydraulic suspension mechanism still includes rear side hydraulic suspension, and a plurality of axles still include the rear axle, and the rear axle is installed at the back frame through trailing hydraulic suspension, and the wheel is also installed to the rear axle both sides.

After adopting such structure, the axle is arranged for 6 × 6, and single axle load is less, can choose for use general highway axle, and volume and dead weight are little, and the whole car is arranged easily, and the focus is lower, stability is good, and makes the degree of difficulty little, can make homely supporting.

This articulated cross-country crane chassis still includes stop gear, stop gear includes spacing hydro-cylinder, the cylinder body of spacing hydro-cylinder is fixed in the front on the frame, spacing hydro-cylinder is in the side of first pivot, the piston rod of spacing hydro-cylinder stretches out to first pivot direction, first pivot one end stretch into the main frame and with main frame fixed connection, the first pivot other end stretch into the front frame and with the front frame between through the bearing cooperation, first pivot lateral wall is opened has the spacing groove with spacing hydro-cylinder piston rod tip complex, when spacing hydro-cylinder piston rod cooperates with the spacing groove of first pivot, the main frame keeps the horizontality.

This spacing groove of first pivot on articulated cross country crane chassis is two sections ladder grooves, and the spacing groove includes first ladder notch and second ladder notch, and first ladder notch is close to the central line position of first pivot, and the piston rod of spacing hydro-cylinder can only be held to first ladder notch inside profile, and first ladder notch of second ladder notch intercommunication and outside, the cross sectional shape of second ladder notch are fan-shaped.

After the structure is adopted, when a piston rod of the limiting oil cylinder is matched with the first step notch, the angle of the front frame relative to the first rotating shaft is fixed, the front frame and the main frame are connected into a rigid whole, and the active hydraulic suspension does not actively adjust the posture of the vehicle body at the moment; when a piston rod of the limiting oil cylinder is matched with the second stepped notch, the first rotating shaft is limited to rotate within a corresponding rotating angle range, and the frames of all sections can rotate relatively.

Drawings

FIG. 1 is a front view of the embodiment of the present articulated off-road crane in use.

FIG. 2 is a front view of the present articulated off-road crane embodiment.

FIG. 3 is a hydraulic control schematic diagram of the front frame and the main frame of the articulated off-road crane embodiment.

FIG. 4 is a cross-sectional view of the stop mechanism and first axle in a left side view of the articulated off-road crane embodiment.

Detailed Description

As shown in fig. 1 to 4 (since the first rotation shaft 4 is located inside the front frame 1 and the main frame 2 and the second rotation shaft 5 is located inside the rear frame 3 and the main frame 2, the first rotation shaft 4 and the second rotation shaft 5 are shown by dotted lines in fig. 2).

The chassis of the articulated cross-country crane comprises a frame, a hydraulic suspension mechanism, a limiting mechanism and three axles.

The frame comprises a front frame 1, a main frame 2 and a rear frame 3, wherein the front frame 1 is arranged on the front side of the main frame 2, and main equipment such as a rotary support of a crane, a cab 11, a suspension arm 12 and the like are arranged on the main frame 2.

The front frame 1 is hinged with the main frame 2 through the first rotating shaft 4, the rear end of the first rotating shaft 4 extends into the main frame 2 and is fixedly connected with the main frame 2, the front end of the first rotating shaft 4 extends into the front frame 1 and is matched with the front frame 1 through the bearing 13, and the rotating axis of the first rotating shaft 4 is consistent with the advancing direction of the vehicle.

The side wall of the first rotating shaft 4 is provided with a limiting groove matched with the end part of a piston rod 6a of the limiting oil cylinder 6, the limiting groove is provided with two sections of stepped grooves, the limiting groove comprises a first stepped groove opening 4a and a second stepped groove opening 4b, the first stepped groove opening 4a is close to the central line position of the first rotating shaft 4, the inner contour of the first stepped groove opening 4a can only contain the piston rod 6a of the limiting oil cylinder 6, the second stepped groove opening 4b is communicated with the first stepped groove opening 4a and the outside, and the section shape of the second stepped groove opening 4b is fan-shaped. The central angle corresponding to the cross-sectional pattern of the second stepped notch 4b is 30 °.

The plurality of axles comprise a front axle, a main axle and a rear axle (the front axle, the main axle and the rear axle can all be common road axles in the prior art, the technology is mature and needs no description, so the figure is also not shown), the hydraulic suspension mechanism comprises a front side hydraulic suspension 8, an active hydraulic suspension 9 and a rear side hydraulic suspension 10, the front axle is arranged on the front frame 1 through the front side hydraulic suspension 8, wheels 7 are arranged on two sides of the front axle, an angle sensor 1a is arranged on the front frame 1, the main axle is arranged on the main frame 2 through the active hydraulic suspension 9, the wheels 7 are also arranged on two sides of the main axle, the rear frame 3 is hinged with the main frame 2 through a second rotating shaft 5, the front end of the second rotating shaft 5 extends into the main frame 2 and is fixedly connected with the main frame 2, the rear end of the second rotating shaft 5 extends into the rear frame 3 and is matched with the rear frame 3 through a bearing 13, the rotating axis of the second rotating shaft 5 is consistent with the advancing direction of the vehicle, the rear axle is arranged on the rear frame 3 through a rear hydraulic suspension, and wheels 7 are also arranged on two sides of the rear axle.

The limiting mechanism comprises a limiting oil cylinder 6, a cylinder body of the limiting oil cylinder 6 is welded on the front frame 1, the limiting oil cylinder 6 is located beside the first rotating shaft 4, and a piston rod 6a of the limiting oil cylinder 6 extends out towards the first rotating shaft 4.

The controller 9a of the active hydraulic suspension 9 collects the vehicle speed signal β, the rotation angle signal of the front frame 1, and the extension signal α of the suspension cylinder 8a of the front hydraulic suspension 8, and controls the extension of the suspension cylinder 9b of the active hydraulic suspension 9 to maintain the main frame 2 in a horizontal state as much as possible.

When the cross-country crane runs on a road and a flat ground, the limiting oil cylinder 6 of the limiting mechanism extends completely, the piston rod 6a of the limiting oil cylinder 6 extends into the first step notch 4a of the limiting groove, the angle of the front frame 1 relative to the first rotating shaft 4 is fixed, the front frame 1 and the main frame 2 are connected into a rigid whole, the active hydraulic suspension 9 does not actively adjust the posture of the vehicle body at the moment, the action is the same as that of the passive oil-gas suspension, only the longitudinal acceleration of the vehicle is acquired through the vehicle body acceleration sensor and is transmitted to the controller 9a, the controller 9a controls the opening size of the electro-proportional valve by adjusting the current size, the damping force of the oil-gas suspension is adjusted, and the requirements of riding comfort and operation stability of the crane are met.

When the crane runs on rough ground, according to a vehicle speed signal β, a rotation angle signal of the front frame 1 and a suspension oil cylinder 8a extension signal α of the front side hydraulic suspension 8, a limit oil cylinder 6 of the limit mechanism retracts to a certain length, a piston rod 6a of the limit oil cylinder 6 is positioned in a second step notch 4b of a limit groove, a first rotating shaft 4 is limited to rotate within a corresponding rotation angle range, all sections of frames can rotate relatively, at the moment, according to the rotation angle of the front frame 1, an active hydraulic suspension 9 actively adjusts the extension of a suspension oil cylinder 9b through a hydraulic system 9c, and the posture of a vehicle body is always kept horizontal to the ground;

when the crane runs by hanging weight, the active hydraulic suspension 9 does not actively adjust the posture of the vehicle body at the moment, the action is the same as that of the passive hydro-pneumatic suspension, but the extending amount of a suspension oil cylinder 9b of the active hydraulic suspension 9 can be adjusted according to the rotating angle of the front frame 1, so that the posture of the vehicle body and the posture of the hung object are always kept horizontal to the ground.

The above work is automatically completed by the controller 9a according to the running condition, and the damping value of the hydraulic system, the rigidity of the suspension and the rotation angle of the hinge mechanism are automatically changed by the crane chassis according to the control signal.

The power system of the chassis of the articulated cross-country crane is driven by a hydraulic hub through all wheels, power is transmitted directly through a hydraulic pump and a hydraulic motor, the weight is light, the size is small, the arrangement is easy, the torque of each wheel can be adjusted in real time according to road conditions, and the fuel economy and the obstacle crossing performance are high; the hub driving avoids the problems of heavy self weight, difficult arrangement and the like of a mechanical power system, and the hub driving advantage is more obvious.

The terrain over which the crane travels can be divided into inclusionary and non-inclusionary terrain. The contained terrain refers to the terrain which can be smoothly passed by the crane through coordinating the attitude of the suspension, and the uncontained terrain refers to the terrain which cannot be passed no matter how the crane adjusts the attitude of the suspension.

The cross-country crane runs in a common wheel type vehicle mode when running on a road and a flat ground, coordinates the postures of the front and rear vehicle bodies to adapt to a bad terrain through the rotation freedom degree of a hinge point when running on a rough ground, and avoids the problems of driving failure, severe vehicle fluctuation, chassis mopping and the like caused by a dropping and jacking process like a common vehicle. Therefore, the utility model has the advantages of strong cross-country ability, simple structure, etc.

The above description is only one embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and improvements can be made without departing from the principle of the present invention, and these should also be considered as belonging to the protection scope of the present invention.

Claims

1. A hinged cross-country crane chassis comprises a frame, a hydraulic suspension mechanism and a plurality of axles, wherein the axles are installed on the frame through the hydraulic suspension mechanism, and wheels are installed on the axles;

it is characterized in that:

2. The articulated off-road crane undercarriage of claim 1, wherein:

the frame still include the back frame, it is articulated through the second pivot between back frame and the main frame, the axis of rotation of second pivot is also unanimous with vehicle advancing direction, hydraulic suspension mechanism still includes rear side hydraulic suspension, and a plurality of axles still include the rear axle, and the rear axle is installed at the back frame through trailing hydraulic suspension, and the wheel is also installed to the rear axle both sides.

3. The articulated off-road crane undercarriage of claim 1, wherein:

the limiting mechanism comprises a limiting oil cylinder, the cylinder body of the limiting oil cylinder is fixed on the front frame, the limiting oil cylinder is located on the side of the first rotating shaft, a piston rod of the limiting oil cylinder extends out in the direction of the first rotating shaft, one end of the first rotating shaft extends into the main frame and is fixedly connected with the main frame, the other end of the first rotating shaft extends into the front frame and is matched with the front frame through a bearing, a limiting groove matched with the end part of a piston rod of the limiting oil cylinder is formed in the side wall of the first rotating shaft, and when the piston rod of the limiting oil cylinder is matched with the limiting groove of the first rotating shaft, the main frame is kept in a.

4. The articulated off-road crane undercarriage of claim 3, wherein:

the spacing groove of first pivot is two sections ladder grooves, and the spacing groove includes first ladder notch and second ladder notch, and first ladder notch is close to the central line position of first pivot, and the piston rod of spacing hydro-cylinder can only be held to first ladder notch inside profile, and first ladder notch of second ladder notch intercommunication and outside, the cross sectional shape of second ladder notch are fan-shaped.