CN210027042U - Axle device and engineering machinery - Google Patents

Abstract

The utility model relates to an axle device and engineering machine tool, wherein, the axle device includes: the first end of each of the first connecting mechanism and the second connecting mechanism is respectively connected with the front axle (2) and the rear axle (4), and the first connecting mechanism is used for being connected with a vehicle power source (5); a clutch member (8) which is provided at a second end of the first or second coupling mechanism so as to be changeable in position; and a state switching drive member for switching to a first state when the vehicle is running at a first speed so that the clutch member (8) is in a first position while engaging with the respective second ends of the first and second connecting mechanisms; and when the vehicle is running at a second speed, switching to a second state to enable the clutch component (8) to be at a second position so as to enable the first connecting mechanism and the second connecting mechanism to be disconnected; the first speed does not exceed the preset operation safety speed, and the second speed exceeds the preset operation safety speed. The structure can enable the engineering machinery to be suitable for high-speed running and low-speed operation at the same time.

Description

Axle device and engineering machinery

Technical Field

The utility model relates to an engineering machine tool technical field especially designs an axle device and engineering machine tool.

Background

The existing loader is generally suitable for low-speed operation, and four-wheel simultaneous driving is needed to increase the ground adhesion force during the low-speed operation. The highest speed of a loader exceeding 80km/h does not exist in China, and the loader does not have an interaxle differential, so that the whole loader tilts forwards and backwards due to the fact that the loader is driven by traditional four-wheel drive at high speed, the gravity center of the whole loader is changed, driving safety is affected, and the safety of a driver is endangered in serious cases. There is therefore a need to improve the adaptability of the loader to different operating conditions.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides an axle device and engineering machine tool can make engineering machine tool be applicable to high-speed traveling and low-speed operation simultaneously.

In order to achieve the above object, a first aspect of embodiments of the present invention provides an axle device, including:

a front axle and a rear axle;

the first ends of the first connecting mechanism and the second connecting mechanism are respectively connected with the front axle and the rear axle, and the first connecting mechanism is used for being connected with a vehicle power source;

the clutch component is arranged at the second end of the first connecting mechanism or the second connecting mechanism in a position changeable manner; and

a state switching drive member for switching to a first state to move the clutch member to a first position while engaging with respective second ends of the first and second connecting mechanisms when the vehicle is traveling at a first speed; when the vehicle runs at a second speed, the vehicle is switched to a second state, so that the clutch component moves to a second position to disconnect the first connecting mechanism and the second connecting mechanism;

wherein the first speed does not exceed the preset operation safety speed, and the second speed exceeds the preset operation safety speed.

In some embodiments, the clutch member is movably disposed along the second end of the first coupling mechanism and the second end of the second coupling mechanism, and the clutch member is moved in opposite directions to the first position and the second position.

In some embodiments, the clutch member includes a spline housing, the second ends of the first and second coupling mechanisms are spline shafts, the spline housing is engaged with the spline shafts, the spline housing moves in the front-rear direction of the vehicle, and the first position is located in front of the second position.

In some embodiments, the state switching drive means comprises:

the auxiliary power source is used for providing high-pressure fluid to drive the clutch component to change positions; and

the first reversing valve and the second reversing valve are respectively provided with a first working position and a second working position;

when the state switching driving component is in a first state, the first reversing valve is in a first working position, the second reversing valve is in a second working position, and high-pressure fluid acts on the clutch component through the first reversing valve to move to a first position; when the state switching driving component is in the second state, the second reversing valve is in the first working position, the first reversing valve is in the second working position, and high-pressure fluid acts on the clutch component through the second reversing valve to move the clutch component to the second position.

In some embodiments, the first and second directional valves are both two-position, three-way valves comprising a fluid inlet, a working port, and a fluid return port;

the fluid inlet is communicated with the auxiliary power source, two ends of the clutch component opposite to the movement direction are respectively provided with a first fluid port and a second fluid port, working ports of the first reversing valve and the second reversing valve are respectively communicated with the first fluid port and the second fluid port, and the fluid return port is used for returning fluid discharged from the first fluid port or the second fluid port.

In some embodiments, the axle device further comprises:

a displacement sensor for detecting displacement of the clutch member; and

and the controller is used for receiving the detection signal of the displacement sensor and stopping the state switching driving part from applying the driving force to the clutch part when judging that the clutch part reaches the first position or the second position.

In some embodiments, the axle device further comprises:

a displacement sensor for detecting displacement of the clutch member; and

the controller is used for receiving a detection signal of the displacement sensor and switching the first reversing valve to the second working position when judging that the clutch component reaches the first position, so that the fluid in the first fluid port flows out of the fluid return port through the first reversing valve; and when the clutch component is judged to reach the second position, the second reversing valve is switched to the second working position, so that the fluid in the second fluid port flows out of the fluid return port through the second reversing valve.

In some embodiments, the axle device further comprises:

the switching operation element is used for receiving external operation and sending out a state switching instruction; and

and a controller that switches the state switching drive part between the first state and the second state in response to an operation instruction of the switching operation element.

In some embodiments, the axle device further comprises:

vehicle speed detection means for detecting a running speed of a vehicle; and

and the controller is used for receiving the running speed signal detected by the vehicle speed detection component, comparing the current running speed with the preset operation safety speed, and switching the state switching driving component to the first state under the condition that the current running speed does not exceed the preset operation safety speed, and switching the state switching driving component to the second state under the condition that the current running speed exceeds the preset operation safety speed.

In order to achieve the above object, a second aspect of embodiments of the present invention provides a construction machine, including the axle device of the above embodiments.

In some embodiments, the work machine is a loader.

Based on the technical scheme, the axle device of an embodiment of the utility model discloses can make the state switch drive part switch to the first state when the vehicle low-speed operation, so that clutch part moves to and combines with the respective second end of first coupling mechanism and second coupling mechanism simultaneously, makes rear axle and vehicle power source joint, realizes that front axle and rear axle drive simultaneously, increases ground adhesion, improves the operation reliability; and when the vehicle runs at high speed, the state switching driving component is switched to the second state, so that the clutch component moves to be separated from the first connecting mechanism, the rear axle is separated from the vehicle power source, and the vehicle is driven only by the front axle, thereby increasing the safety of high-speed running. The axle device enables the engineering machinery to be suitable for high-speed running and low-speed operation at the same time.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

fig. 1 is a schematic structural diagram of an embodiment of the axle device of the present invention.

Description of the reference numerals

1. A front wheel; 2. a front axle; 3. a rear wheel; 4. a rear axle; 5. a vehicle power source; 6. a first connecting mechanism; 7. a second connecting mechanism; 8. a clutch member; 81. a first fluid port; 82. a second fluid port; 9. a displacement sensor; 10. a first direction changing valve; 11. a second directional control valve; 101. a fluid inlet; 102. a working port; 103. a fluid return port; 12. an air compressor; 13. a gas storage container; 14. a pressure reducing valve; 15. a controller; 16. a switching operation element; 17. a power source.

Detailed Description

The present invention will be described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. Aspects so defined may be combined with any other aspect or aspects unless clearly indicated to the contrary. In particular, any feature considered to be preferred or advantageous may be combined with one or more other features considered to be preferred or advantageous.

The terms "first", "second", and the like in the present invention are used for convenience of description only to distinguish different constituent elements having the same name, and do not indicate a sequential or primary-secondary relationship.

In the description of the present invention, the directions or positional relationships indicated by "upper", "lower", "top", "bottom", "front", "rear", "inner" and "outer" are used as the directions or positional relationships indicated by the drawings, and are only for convenience of description of the present invention, and it is not intended to indicate or imply that the device indicated must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the scope of the present invention. The above directions are determined based on the driver's presence in the vehicle, and the longitudinal direction of the vehicle is the front-rear direction and the lateral direction is the left-right direction.

As shown in fig. 1, the present disclosure provides an axle device for a construction machine, which in some embodiments includes: the front axle 2, the rear axle 4, the first connecting mechanism 6, the second connecting mechanism 7, the clutch member 8 and the state switching driving member. Wherein, front wheel 1 is connected respectively at the both ends of front axle 2, and the rear wheel is connected respectively at the both ends of rear axle 4, and front axle 2 and rear axle 4 can adopt full bridge or half-bridge.

A first end of the first connecting means 6 is connected to the front axle 2, a first end of the second connecting means 7 is connected to the rear axle 4, and the first connecting means 6 is adapted to be connected to a vehicle power source 5, such as an engine. The first and second connection mechanisms 6 and 7 may include at least one of a gear transmission structure and a link mechanism. The clutch element 8 is arranged at a position which can be changed at a second end of the first connection 6 or of the second connection 7.

When the vehicle runs at the first speed, the first speed does not exceed a preset operation safety speed, for example 80km/h, namely the vehicle is in a low-speed operation mode, the state switching driving component is switched to the first state, so that the clutch component 8 moves to the first position and is combined with the second ends of the first connecting mechanism 6 and the second connecting mechanism 7, the rear axle 4 is combined with the first connecting mechanism 6 through the second connecting mechanism 7 and the clutch component 8, the vehicle power source 5 can drive the front axle 2 and the rear axle 4 simultaneously, the ground adhesion of tires can be increased, and the reliability of the engineering machine in the low-speed operation mode can be improved.

When the vehicle is travelling at a second speed, which exceeds the preset work safety speed, the state switching drive member is switched to the second state, such that moving the clutch member 8 to the second position disengages the first and second coupling means 6, 7. The rear axle 4 is disconnected from the vehicle power source 5, the vehicle power source 5 provides driving force only for the front axle 2, and the rear wheels 3 follow. The front wheel 1 and the rear wheel 3 have larger speed difference when telling to run due to the influence of manufacturing errors, tire pressure and vehicle gravity center, and the driving mode can prevent the engineering machinery from bending forward and bending backward under a high-speed running mode, so that the obvious 'nodding' phenomenon is generated, the running stability of the vehicle is improved, and the safety of a driver is guaranteed.

Therefore, the axle device can enable the engineering machinery to be suitable for high-speed running and low-speed operation at the same time, improves the adaptability of the engineering machinery to operation and running, can reliably operate, can efficiently and safely transition, and can improve the working efficiency.

In some embodiments, as shown in fig. 1, the clutch member 8 is movably disposed along the second end of the first coupling mechanism 6 and the second end of the second coupling mechanism 7, and the clutch member 8 reaches the first position and the second position by moving in opposite directions. The position of the clutch component 8 is changed in a moving mode, so that the stability in the state switching process can be improved, and the space is saved.

For example, the clutch member 8 includes a spline housing, and the second ends of the first connecting mechanism 6 and the second connecting mechanism 7 are spline shafts, and the spline housing is fitted to the spline shafts. The structure can reliably combine the spline shafts of the first connecting mechanism 6 and the second connecting mechanism 7 when the spline housing moves to the first position, reliably transmit the driving force of the vehicle power source 5, and is easy to separate from the spline shaft of the first connecting mechanism 6 when the spline housing moves to the second position in the reverse direction, and the structure is simple and easy to realize. Or, the second ends of the first connecting mechanism 6 and the second connecting mechanism 7 are shafts with flat keys, the clutch component 8 comprises a shaft sleeve, and the inner wall of the shaft sleeve is provided with a key groove matched with the flat key.

Alternatively, the first end of the clutch member 8 is hinged to one of the first connecting mechanism 6 and the second connecting mechanism 7, and the second end is swingable about the hinge point to reach the first position or the second position by swinging, and when the first position is reached, it is necessary to engage the second end of the clutch member with the other of the first connecting mechanism 6 and the second connecting mechanism 7.

In some embodiments, the second ends of the first and second connecting mechanisms 6 and 7 are arranged in the longitudinal direction of the vehicle, the moving direction of the clutch member 8 such as the spline housing is the front-rear direction of the vehicle, and the first position is located forward of the second position. This structure can simplify the layout of the two connection structures. Moreover, the second ends of the first connecting mechanism 6 and the second connecting mechanism 7 can be located at the center position in the transverse direction of the vehicle, and when the rear axle 4 is combined, the driving force provided by the vehicle power source 5 can be uniformly applied to the rear wheels 3 on the left and right sides, so that the running stability of the vehicle is improved.

In some embodiments, as shown in fig. 1, the state switching drive part includes: an auxiliary power source for providing high-pressure fluid to drive the clutch member 8 to move, wherein the fluid can be gas or hydraulic oil; and a first direction valve 10 and a second direction valve 11, each having a first working position and a second working position.

When the state switching drive member is in the first state, the first direction valve 10 is in the first operating position (upper position in fig. 1), the second direction valve 11 is in the second operating position (lower position in fig. 1), and the high-pressure fluid acts on the clutch member 8 through the first direction valve 10 to move the clutch member to the first position. When the state switching drive member is in the second state, the second direction switching valve 11 is in the first operating position (upper position in fig. 1), the first direction switching valve 10 is in the second operating position (lower position in fig. 1), and the high-pressure fluid acts on the clutch member 8 through the second direction switching valve 11 to move the clutch member to the second position.

In the embodiment, the clutch component 8 is driven to move by high-pressure fluid, so that larger driving force can be realized, the rear axle 4 and the vehicle power source 5 are reliably combined or separated, and the reliability of the driving mode switching of the engineering machinery in low-speed operation and high-speed running modes is improved. Alternatively, the clutch member 8 may be driven to move by an electric linear motion mechanism.

As shown in fig. 1, the first direction valve 10 and the second direction valve 11 are two-position three-way valves, each including a fluid inlet 101, a working port 102, and a fluid return port 103. Wherein, the fluid inlet 101 is communicated with the auxiliary power source, the two ends of the clutch component 8 along the opposite moving direction are respectively provided with a first fluid port 81 and a second fluid port 82, the working ports 102 of the first reversing valve 10 and the second reversing valve 11 are respectively communicated with the first fluid port 81 and the second fluid port 82, and the fluid return port 103 is used for returning the fluid discharged from the first fluid port 81 or the second fluid port 82.

The cross-sectional area of the first and second fluid ports 81 and 82 may be larger than the cross-sectional area of the pipe connected thereto to provide a greater driving force for the movement of the clutch member 8 under a certain fluid pressure. Alternatively, in the case where the driving force demand is small, the cross-sectional areas of the first fluid port 81 and the second fluid port 82 may also coincide with the cross-sectional area of the pipe, serving only as pipe connection ports.

By using two independent directional control valves to control the direction of movement of the high pressure fluid driven clutch pack 8, the vehicle can still operate in the event of a failure of one directional control valve. For example, in the case of a failure of the first direction switching valve 10, the rear axle 4 can be disengaged by switching the second direction switching valve 11, and the vehicle is suitable for high-speed traveling, but a light-load low-speed operation can be performed in this state; in the event of a failure of the second directional control valve 11, the rear axle 4 can be engaged by switching the first directional control valve 10, and the vehicle is suitable for low-speed operation, but the vehicle can be driven at a speed close to the preset operation safety speed in this state.

In some embodiments, the auxiliary power source comprises: the air compressor 12 and the air storage container 13, the air storage container 13 is used for storing the high-pressure gas generated by the air compressor 12. Or the auxiliary power source includes: the hydraulic pump is used for converting hydraulic oil in the oil tank into high-pressure oil.

Further, a pressure reducing valve 14 is provided between the auxiliary power source and the first and second direction changing valves 10 and 11 to reduce the pressure of the high-pressure fluid to a pressure suitable for providing the clutch member 8 with a suitable driving force.

In addition to using two separate directional valves, in other embodiments, the state-switching drive component includes: an auxiliary power source for providing high-pressure fluid to drive the clutch member 8 to move; and the third reversing valve is provided with a first working position, a second working position and a third working position, and the third working position is positioned between the first working position and the second working position. When the state switching driving component is in the first state, high-pressure fluid acts on the clutch component 8 through the first working position of the third reversing valve to move the clutch component 8 to the first position; when the state switching driving component is in the second state, the high-pressure fluid acts on the clutch component 8 through the second working position of the third reversing valve to move the clutch component to the second position.

This embodiment simplifies the construction, saves space and simplifies the control logic by providing a reversing valve to switch the clutch member 8 between the first position and the second position.

In some embodiments, the utility model discloses an axle device still includes: a displacement sensor 9 for detecting displacement of the clutch member 8; and a controller 15 for receiving the detection signal of the displacement sensor 9 and stopping the state switching drive member from applying the driving force to the clutch member 8 when it is determined that the clutch member 8 has moved to reach the first position or the second position. In the low speed operation or high speed running mode, when the clutch member 8 is moved to the right position, the clutch member 8 can be stopped by stopping the application of the driving force without continuing the movement.

In a specific embodiment, as shown in fig. 1, the axle device of the present invention further includes: a displacement sensor 9 for detecting displacement of the clutch member 8; and a controller 15 for receiving the detection signal of the displacement sensor 9, and when the clutch member 8 is judged to reach the first position, switching the first direction valve 10 to the second working position, so that the fluid in the first fluid port 81 flows out from the fluid return port 103 through the first direction valve 10; when it is determined that the clutch member 8 has reached the second position, the second switching valve 11 is switched to the second operating position so that the fluid in the second fluid port 82 flows out of the fluid return port 103 through the second switching valve 11.

In some embodiments, the utility model discloses an axle device still includes: a switching operation element 16 for receiving an external operation and sending a state switching instruction, for example, a button, a handle, or a toggle switch; and a controller 15 that switches the state switching drive member between the first state and the second state in response to an operation instruction of the switching operation element 16.

Before the vehicle needs to enter a low-speed operation mode or a high-speed running mode, an operator can select the state through the switching operation element 16, the switching operation element 16 can be arranged in a cab or on a remote controller, and the engineering machine can be flexibly and conveniently switched to the required mode according to the requirement. Preferably, in the neutral state, the operator selects the operation mode through the switching operation member 16, and stops the state switching driving member from applying the driving force to the clutch member 8 when it is determined that the clutch member 8 is moved to the right position based on the detection signal of the displacement sensor 9, and then engages the forward gear to perform the low speed operation or the high speed running.

In other embodiments, the axle assembly of the present invention further comprises: vehicle speed detection means for detecting a running speed of a vehicle; and a controller 15 for receiving the running speed signal detected by the vehicle speed detecting means, and comparing the current running speed with a preset operation safety speed, so as to automatically switch the state switching driving means to the first state when the current running speed does not exceed the preset operation safety speed, and to automatically switch the state switching driving means to the second state when the current running speed exceeds the preset operation safety speed.

The embodiment can reduce the operation burden of a driver, automatically match a proper driving mode according to the running speed of the vehicle, ensure that the vehicle has reliable adhesive force with the ground when running at low speed, and ensure the safety of the vehicle when running at high speed. For example, when the construction machine is performing work, in order to secure reliable ground adhesion, it should be driven at a first speed, and if the controller determines that the current driving speed exceeds a preset work safety speed, the rear axle 4 is automatically disengaged to improve driving safety.

The working principle of the axle device of the present invention will be described with reference to fig. 1 as an example and a specific embodiment.

For the circuit connections, as indicated by the dashed lines in fig. 1. The controller 15 is an Electronic Control Unit (ECU), the switching operation element 16 is a switch, such as a seesaw-type single-pole double-throw switch, only one of the terminal L and the terminal M or the terminal N of the switch is turned on, the terminal M and the terminal N cannot be turned on at the same time, and the terminal L is always turned on with one of the terminals. The positive pole of the power supply 17 is connected with the terminal L of the switch, the terminals M and N of the switch are respectively connected with the terminal F and the terminal E of the ECU, the terminal A, the terminal B and the terminal C of the ECU are respectively connected with the negative pole of the power supply 17, the terminal H of the second reversing valve 11 and the terminal K of the first reversing valve 10, the terminal G of the second reversing valve 11 and the terminal J of the first reversing valve 10 are simultaneously connected with the negative pole of the power supply 17, and the terminal D of the ECU is connected with the displacement sensor 9.

For the pneumatic connection, as shown in solid line in fig. 1. The air compressor 12 is connected to the fluid inlets 101 of the first and second direction changing valves 10 and 11 sequentially via the air storage container 13 and the pressure reducing valve 14, for example, the outlet pressure of the pressure reducing valve 14 is 0.5 ± 0.1MPa, or the air in the air storage container 13 may be from other systems of the vehicle; the working ports 102 of the first and second direction valves 10 and 11 communicate with the first and second fluid ports 81 and 82, respectively, at opposite ends of the clutch member 8; the fluid return ports 103 of the first and second directional valves 10 and 11 are simultaneously exposed to the atmosphere. The first direction valve 10 and the second direction valve 11 may be two-position three-way electromagnetic pneumatic valves, or proportional electromagnetic pneumatic valves, and when the valves are not powered, the fluid inlet 101 is disconnected from the working port 102, and the fluid return port 103 is communicated with the working port.

The working principle of the axle device is as follows:

when the vehicle needs to work at low speed, four-wheel simultaneous driving is needed in order to fully exert the adhesive force of the ground. At this time, in a neutral state, the switch is pressed, the terminal L and the terminal N of the switch are connected, the terminal K of the first directional valve 10 is connected, the electromagnet is powered, the fluid inlet 101 is connected with the working port 102, the gas in the gas storage container 13 passes through the pressure reducing valve 14 and the first directional valve 10 to the first fluid port 81 of the clutch member 8, so that the clutch member 8 moves to the first position under the action of the gas pressure, and the first connecting mechanism 6 and the second connecting mechanism 7 are connected. When the rear axle 4 is engaged securely, the displacement sensor 9 transmits the engagement information of the rear axle 4 to the ECU, which de-energizes the first directional valve 10 quickly and exhausts the gas of the second fluid port 82 to the atmosphere through the working port 102 and the fluid return port 103 of the first directional valve 10. At this time, the forward gear is engaged again, and low-speed operation is performed.

When the vehicle needs high-speed operation, in order to ensure safe driving and prevent the whole machine from pitching forward and backward at high speed, the rear axle 4 needs to be disengaged and only the front axle 2 needs to be driven. At this time, in a neutral state, the switch is pressed, the terminal L and the terminal M of the switch are engaged, the terminal H of the second directional valve 11 is connected, the electromagnet is energized, the fluid inlet 101 is connected with the working port 102, the gas in the gas storage container 13 passes through the pressure reducing valve 14 and the second directional valve 11 to reach the second fluid port 82 of the clutch member 8, so that the clutch member 8 moves to the second position under the action of the gas pressure, and the second connecting mechanism 7 and the first connecting mechanism 6 are connected. When the rear axle 4 is reliably disconnected, the displacement sensor 9 transmits the information that the rear axle 4 is disconnected to the ECU, the ECU rapidly de-energizes the second directional valve 11, and the gas in the first fluid port 82 is discharged to the atmosphere through the working port 102 and the fluid return port 103 of the second directional valve 11. At this time, the forward gear is engaged again, and high-speed travel is performed.

Compared with the common axle system, the axle device only needs to be additionally provided with the reversing valve, the pressure reducing valve 14 and the clutch component 8, and the cost is slightly increased compared with the whole axle device; the sensitivity and the response speed of the whole control system can be improved by adopting the ECU and the electric control, so that the vehicle can be rapidly switched in different modes; the whole device has simple working principle, less elements, high reliability, easy positioning under the condition of failure, convenient maintenance and detection and low maintenance cost; the whole machine integrates the working modes of high-speed running and low-speed operation, the high-speed running can be used for transition or material conveying, and the adaptability is strong.

Secondly, the utility model also provides an engineering machine tool, including the axle device of above-mentioned embodiment. The engineering machine can enable the rear axle to be connected with a vehicle power source when the engineering machine works at low speed, so that the front axle and the rear axle are driven simultaneously, the ground adhesion is increased, and the working reliability is improved; and when the vehicle runs at high speed, the rear axle is separated from the power source of the vehicle, and the vehicle is driven only by the front axle, so that the safety of high-speed running is improved. The engineering machine can be suitable for high-speed running and low-speed operation at the same time.

Preferably, the work machine is a loader. Because no loader suitable for high-speed running exists in China at present, the loader does not have an interaxle differential, the situation that the speed difference of four wheels is large can occur when the loader is driven by adopting the traditional four-wheel drive at high speed, and the whole loader tilts forwards and backwards. Adopt the utility model discloses axle device's loader can increase the security of going at a high speed, can realize high-efficient transition to improve driver's security, also can improve the operation reliability moreover.

In addition, the engineering machinery can also be a rubber-tyred crane, an excavator, a rotary drilling rig or the like.

It is right above the utility model provides an axle device and engineering machine tool have carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, which are presented only to aid in understanding the methods and their core concepts. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (10)

1. An axle device, comprising:

a front axle (2) and a rear axle (4);

a first connecting mechanism (6) and a second connecting mechanism (7), wherein the first ends of the first connecting mechanism and the second connecting mechanism are respectively connected with the front axle (2) and the rear axle (4), and the first connecting mechanism (6) is used for being connected with a vehicle power source (5);

a clutch member (8) which is provided at a second end of the first connecting mechanism (6) or the second connecting mechanism (7) in a position-changeable manner; and

a state switching drive member for switching to a first state to move the clutch member (8) to a first position while engaging with respective second ends of the first connecting mechanism (6) and the second connecting mechanism (7) when the vehicle is running at a first speed; and when the vehicle runs at a second speed, switching to a second state to move the clutch component (8) to a second position to disengage the first connecting mechanism (6) and the second connecting mechanism (7);

the first speed is not more than a preset operation safety speed, and the second speed is more than the preset operation safety speed.

2. The axle arrangement according to claim 1, characterized in that the clutch member (8) is movably arranged along a second end of the first connection (6) and a second end of the second connection (7), the clutch member (8) reaching the first and second positions by moving in opposite directions.

3. The axle arrangement of claim 2, characterized in that the clutch member (8) comprises a spline housing, the second ends of the first and second coupling mechanisms (6, 7) are spline shafts, the spline housing is fitted to the spline shafts, the direction of movement of the spline housing is the front-rear direction of the vehicle, and the first position is located forward of the second position.

4. The axle arrangement of claim 1, wherein the state-shifting drive component includes:

an auxiliary power source for providing high-pressure fluid to drive the clutch member (8) to change positions; and

the first reversing valve (10) and the second reversing valve (11) are respectively provided with a first working position and a second working position;

when the state switching driving component is in a first state, the first reversing valve (10) is in a first working position, the second reversing valve (11) is in a second working position, and high-pressure fluid acts on the clutch component (8) through the first reversing valve (10) to move the clutch component to the first position; when the state switching driving component is in a second state, the second reversing valve (11) is in a first working position, the first reversing valve (10) is in a second working position, and high-pressure fluid acts on the clutch component (8) through the second reversing valve (11) to move the clutch component to a second position.

5. The axle arrangement according to claim 4, characterized in that the first directional valve (10) and the second directional valve (11) are both two-position, three-way valves comprising a fluid inlet (101), a working port (102) and a fluid return port (103);

the fluid inlet (101) is communicated with the auxiliary power source, two ends of the clutch component (8) opposite to the movement direction are respectively provided with a first fluid port (81) and a second fluid port (82), working ports (102) of the first reversing valve (10) and the second reversing valve (11) are respectively communicated with the first fluid port (81) and the second fluid port (82), and a fluid return port (103) is used for returning fluid discharged from the first fluid port (81) or the second fluid port (82).

6. The axle arrangement of claim 1, further comprising:

a displacement sensor (9) for detecting a displacement of the clutch member (8); and

and a controller (15) for receiving the detection signal of the displacement sensor (9) and stopping the state switching drive member from applying the driving force to the clutch member (8) when the clutch member (8) is judged to reach the first position or the second position.

7. The axle arrangement of claim 5, further comprising:

a displacement sensor (9) for detecting a displacement of the clutch member (8); and

a controller (15) for receiving the detection signal of the displacement sensor (9) and switching the first reversing valve (10) to a second working position when the clutch component (8) is judged to reach the first position, so that the fluid in the first fluid port (81) flows out of the fluid return port (103) through the first reversing valve (10); when the clutch component (8) is judged to reach the second position, the second reversing valve (11) is switched to a second working position, so that the fluid in the second fluid port (82) flows out of the fluid return port (103) through the second reversing valve (11).

8. The axle arrangement of claim 1, further comprising:

a switching operation element (16) for receiving an external operation and issuing a state switching instruction; and

a controller (15) that switches the state switching drive member between a first state and a second state in response to an operation instruction of the switching operation element (16).

9. The axle arrangement of claim 1, further comprising:

vehicle speed detection means for detecting a running speed of the vehicle; and

and the controller (15) is used for receiving the running speed signal detected by the vehicle speed detection component, comparing the current running speed with the preset operation safety speed, switching the state switching driving component to a first state under the condition that the current running speed does not exceed the preset operation safety speed, and switching the state switching driving component to a second state under the condition that the current running speed exceeds the preset operation safety speed.

10. A construction machine comprising an axle device according to any one of claims 1 to 9.

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