CN117227855A - Overturning driving system of cab and automobile - Google Patents

Abstract

The application discloses a turnover driving system of a cab and an automobile, and relates to the technical field of automobile turnover driving. According to the embodiment of the application, the two different angles of cab overturning are realized by controlling the switching of the oil way of the hydraulic system so as to change the difference of the telescopic travel of the oil cylinder, so that the purposes of daily maintenance and repair of users and large-piece maintenance are simultaneously adapted, and the use experience of users is improved.

Description

Overturning driving system of cab and automobile

Technical Field

The application relates to the technical field of automobile overturn driving, in particular to an overturn driving system of a cab and an automobile.

Background

The WS series chassis matched cab in the technical field of heavy vehicles is mostly a flat-head cab, and the cab turning device is a device for lifting the cab to turn forward around a pivot for a certain angle so as to facilitate the maintenance of a power system. At present, the cab turning device mainly comprises two types of mechanical turning and hydraulic turning. Wherein the mechanical overturning is suitable for light and medium trucks, and the hydraulic overturning is suitable for overturning an extra heavy cab.

The hydraulic overturning system is used for the medium-heavy truck, converts the hydraulic pressure into mechanical force to act on the cab to overturn and lift, is convenient to maintain and repair, and is a necessary part of the medium-heavy truck commercial vehicle. At present, the hydraulic overturning system for the medium-heavy truck commercial vehicle in the market is universal in only one stroke and overturns by a fixed angle. However, the practitioner finds that the vehicle only needs to turn the cab to a certain small angle when in daily maintenance, so that the vehicle is time-saving, labor-saving, convenient and quick. When the large part is required to be maintained, the cab is turned over by a larger angle, so that the lifting and the maintenance are convenient, and different requirements of a user on the turning angle are difficult to meet by a conventional turning system.

Disclosure of Invention

The hydraulic overturning system is difficult to meet the requirements of users for various overturning angles in the prior art, so that the users are difficult to properly maintain the automobile.

In a first aspect, the present application provides a roll-over drive system for a cab, comprising:

the overturning oil cylinder assembly is connected with a part to be overturned, the overturning oil cylinder assembly can be switched to a first lifting state or a second lifting state according to different telescopic strokes of the movable part of the overturning oil cylinder assembly, when the overturning oil cylinder assembly is switched to the first lifting state, the cab is overturned at a first angle, and when the overturning oil cylinder assembly is switched to the second lifting state, the cab is overturned at a second angle, and the second angle is larger than the first angle;

the turnover oil pump assembly is provided with a plurality of oil ways communicated with the turnover oil cylinder assembly, the turnover oil pump assembly is provided with a reversing part, and the reversing part can control the telescopic travel of the turnover oil cylinder assembly by adjusting the on-off of the oil way of the turnover oil pump assembly so as to drive the cab to turn over at a first angle or turn over at a second angle.

With reference to the first aspect, in some embodiments, the rollover oil cylinder assembly includes: the device comprises a piston cylinder assembly, an oil return path and a guide rod, wherein the piston cylinder assembly is communicated with the oil return path, a movable part of the piston cylinder assembly is connected with a cab, the oil return path is in a normally closed and cut-off state, the guide rod is movably connected with the piston cylinder assembly, and the guide rod can be used for movably conducting the oil return path; wherein,

when the turnover oil cylinder assembly is switched to the first lifting state, the piston cylinder assembly moving part performs reciprocating motion, and drives the cab and the guide rod to operate at the same time until the guide rod is communicated with the oil return path so as to discharge high-pressure oil in the piston cylinder assembly, the cab stops turning and is kept at the first angle, when the turnover oil cylinder assembly is switched from the first lifting state to the second lifting state, the oil return path and the oil path of the turnover oil pump assembly are cut off, the piston cylinder assembly moving part performs reciprocating motion again, and drives the cab to perform turning motion until the piston cylinder assembly reaches the maximum turning stroke, and the cab stops turning and is kept at the second angle.

With reference to the first aspect, in some embodiments, the reverse oil pump assembly includes: the oil storage device comprises an oil storage tank and a pump body, wherein the pump body is connected with the oil storage tank, a first interface and an oil return interface are arranged on the pump body, the first interface is connected with an oil conveying oil way of the pump body through a reversing part, and the oil return interface is connected with the oil storage tank through the reversing part.

With reference to the first aspect, in some embodiments, the pump body is provided with a second interface, the second interface can be communicated with the oil delivery circuit of the pump body or directly communicated with the oil storage tank through the reversing portion, and the reversing portion is configured to be sequentially switched to an ascending one position, an ascending two position and a descending position; wherein,

when the reversing part is switched to the ascending position, the oil return interface is communicated with the oil storage tank, the pump body is communicated with the oil storage tank through a first interface and a second interface, when the reversing part is switched to the ascending position, the oil return interface and the oil storage tank are in a cut-off state, the pump body is communicated with the oil storage tank through the first interface and the second interface to deliver oil to the piston tank assembly, when the reversing part is switched to the descending position, the oil return interface and the oil storage tank are in a cut-off state, the pump body is communicated with the oil storage tank through the first interface to deliver oil to the piston tank assembly, and one end of the second interface is communicated with the oil storage tank, and the other end of the second interface is communicated with the piston tank assembly to discharge high-pressure oil in the oil cavity of the piston tank assembly.

With reference to the first aspect, in some embodiments, the reversing portion includes:

the reversing valve is connected with the first interface, the second interface and the oil return interface;

and the reversing rod is connected with the reversing valve.

With reference to the first aspect, in some embodiments, a first pipe joint and a second pipe joint are provided on the piston cylinder assembly, and the first pipe joint and the second pipe joint are respectively in butt joint with the first interface and the second interface.

With reference to the first aspect, in some embodiments, the piston-cylinder assembly includes:

the cylinder is characterized in that a piston rod is arranged in an oil cavity of the cylinder and is connected with the guide rod, the piston rod is simultaneously connected with the guide rod and the cab, and the piston rod can reciprocate in the oil cavity of the cylinder.

With reference to the first aspect, in some embodiments, the oil return path includes:

a main oil pipe connected with the first pipe joint;

and the stroke valve is arranged on the main oil pipe and is in a normally closed and cut-off state.

In combination with the first aspect, in some embodiments, a trigger boss is disposed on the guide rod, and the guide rod can make the trigger boss cooperate with the stroke valve to conduct the main oil pipe through telescopic action.

In a second aspect, the present application provides an automobile comprising: a hydraulic roll-over drive system as claimed in any one of the preceding claims.

In summary, in the embodiment of the application, the two different angles of cab overturning are realized by controlling the switching of the oil way of the hydraulic system so as to change the difference of the telescopic travel of the oil cylinder, so that the purposes of daily maintenance and repair of users and large-piece maintenance are simultaneously adapted, and the use experience of users is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a tilt cylinder assembly according to an embodiment of the present application;

FIG. 2 is a schematic illustration of a reversible oil pump assembly according to an embodiment of the present application;

FIG. 3 is a cross-sectional view of a reversible oil pump assembly according to an embodiment of the present application;

FIG. 4 is a schematic diagram of the reversing section in the reversing drive system in a raised position according to an embodiment of the present application;

FIG. 5 is a schematic diagram showing the reversing section in the reversing drive system in the ascending position according to the embodiment of the application;

fig. 6 is a schematic diagram of the reversing section in the reversing driving system in the descending position according to the embodiment of the application.

In the figure: 1. a piston cylinder assembly; 11. an oil return path; 111. a main oil pipe; 112. a stroke valve; 12. a first pipe joint; 13. a second pipe joint; 14. a cylinder; 15. a piston rod; 2. a guide rod; 21. triggering the boss; 3. a reversing section; 31. a reversing valve; 32. a reversing lever; 4. an oil storage tank; 5. a pump body; 51. a first interface; 52. a second interface; 53. an oil return interface; 54. a cam; 56. a plunger; 57. a rocker arm; 58. a vent plug.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Embodiments of the present application are described in further detail below with reference to the accompanying drawings. Aiming at the problem that a hydraulic overturning system in the prior art is difficult to meet the requirements of users for various overturning angles, so that the users are difficult to carry out proper maintenance on automobiles, the application provides an overturning driving system of a cab, which comprises the following components: a turnover oil cylinder assembly and a turnover oil pump assembly; wherein,

the overturning oil cylinder assembly is connected with a part to be overturned, the overturning oil cylinder assembly can be switched to a first lifting state or a second lifting state according to the difference of telescopic strokes of the movable parts of the overturning oil cylinder assembly, when the overturning oil cylinder assembly is switched to the first lifting state, the cab is overturned at a first angle, when the overturning oil cylinder assembly is switched to the second lifting state, the cab is overturned at a second angle, and the second angle is larger than the first angle. The turnover oil pump assembly is provided with a plurality of oil ways communicated with the turnover oil cylinder assembly, the turnover oil pump assembly is provided with a reversing part 3, and the reversing part 3 can control the telescopic travel of the turnover oil cylinder assembly by adjusting the on-off of the oil way of the turnover oil pump assembly so as to drive the cab to turn over at a first angle or turn over at a second angle.

It can be understood that in the embodiment of the application, the cab is turned over by two different angles by controlling the switching of the oil way of the hydraulic system so as to change the difference of the telescopic travel of the oil cylinder, and when the cab is turned over to the first angle, a user can carry out daily maintenance on the cab. When the user prepares to carry out the major possession maintenance, user accessible switching-over portion 3 switches upset hydro-cylinder assembly and gets into the second and rises the position state, and the driver's cabin is continued to overturn to the second angle by first angle this moment, and the second angle is greater than first angle to the convenience of customers carries out the major possession maintenance to the driver's cabin, has improved user's use experience.

In some specific embodiments, as shown in fig. 1, 4, 5 and 6, the tilt cylinder assembly includes: the device comprises a piston cylinder assembly 1, an oil return oil way 11 and a guide rod 2, wherein the piston cylinder assembly 1 is communicated with the oil return oil way 11, a movable part of the piston cylinder assembly 1 is connected with a cab, the oil return oil way 11 is in a normally closed and cut-off state, the guide rod 2 is movably connected with the piston cylinder assembly 1, and the guide rod 2 can movably conduct the oil return oil way 11; wherein,

when the turnover oil cylinder assembly is switched to the first lifting state, the movable part of the piston cylinder assembly 1 performs reciprocating motion, and drives the cab and the guide rod 2 to operate until the guide rod 2 is conducted with the oil return path 11 so as to discharge high-pressure oil in the piston cylinder assembly 1, the cab stops turning and is kept at the first angle, when the turnover oil cylinder assembly is switched from the first lifting state to the second lifting state, the oil return path 11 is blocked from the oil path of the turnover oil pump assembly, the movable part of the piston cylinder assembly 1 performs reciprocating motion again, and drives the cab to perform turning motion until the piston cylinder assembly 1 reaches the maximum turning stroke, and the cab stops turning and is kept at the second angle.

It should be noted that, there are rod cavities (referred to as piston rod 15) and rodless cavities in the oil cavity of the piston cylinder assembly 1, and the overturning oil pump assembly inputs high-pressure oil into the piston cylinder assembly 1 and then enters the rod cavities and rodless cavities at the same time, and the pressure difference is formed due to the different pressures of the two cavities after oil injection, so as to drive the piston rod 15 to reciprocate. Further, when the piston cylinder assembly 1 is in the first lifting state, the cab is turned over by the precursor, the guide rod 2 stretches out along with the cab, when the guide rod 2 moves and is in trigger fit with the oil return oil path 11, the oil return oil path 11 is conducted, high-pressure oil in the piston cylinder assembly 1 is discharged through the oil return oil path 11, the piston cylinder assembly 1 loses power and does not execute reciprocating motion, and the cab stops turning over. Therefore, the first angle of the cab turning can be adjusted by designing the stroke length of the guide rod 2 and the oil return path.

In some specific embodiments, as shown in fig. 2 and 3, the reverse oil pump assembly includes: an oil storage tank 4 and a pump body 5; wherein,

the pump body 5 with the oil storage tank 4 links to each other, be equipped with first interface 51 and return oil interface 53 on the pump body 5, first interface 51 pass through switching-over portion 3 with the oil delivery oil circuit of the pump body 5 links to each other, return oil interface 53 passes through switching-over portion 3 with the oil storage tank 4 links to each other.

Further, a second interface 52 is provided on the pump body 5, the second interface 52 may be communicated with the oil delivery path of the pump body 5 through the reversing portion 3 or directly communicated with the oil storage tank 4, and the reversing portion 3 is configured to be sequentially switched to an ascending one position, an ascending two position and a descending position; wherein,

when the reversing part 3 is switched to the ascending position, the oil return port 53 is communicated with the oil storage tank 4, the pump body 5 is used for conveying high-pressure oil to the piston cylinder assembly 1 through the first port 51 and the second port 52, when the reversing part 3 is switched to the ascending position, the oil return port 53 and the oil storage tank 4 are in a cut-off state, the pump body 5 is used for conveying oil to the piston cylinder assembly 1 through the first port 51 and the second port 52, and when the reversing part 3 is switched to the descending position, the oil return port 53 and the oil storage tank 4 are in a cut-off state, the pump body 5 is used for conveying oil to the piston cylinder assembly 1 through the first port 51, one end of the second port 52 is communicated with the oil storage tank 4, and the other end of the second port 52 is communicated with the piston cylinder assembly 1 so as to discharge the high-pressure oil in the oil cavity of the piston cylinder assembly 1.

It can be understood that the reversing portion 3 can control the cut-off or on states of the first interface 51, the second interface 52 and the oil return interface 53, so as to drive the overturning angle of the cab.

Specifically, as shown in fig. 2 and 3, the reversing section 3 includes: a reversing valve 31 and a reversing lever 32; wherein,

and the reversing valve 31 is connected with the first port 51, the second port 52 and the oil return port 53. A reversing lever 32 connected to the reversing valve 31.

In some embodiments, as shown in fig. 1, the piston cylinder assembly 1 is provided with a first pipe joint 12 (as a port B in fig. 1) and a second pipe joint 13 (as a port a in fig. 1), and the first pipe joint 12 and the second pipe joint 13 are respectively abutted with the first interface 51 and the second interface 52.

Further, as shown in fig. 1, the piston-cylinder assembly 1 includes: the cylinder 14, its oil pocket is equipped with piston rod 15, piston rod 15 with guide bar 2 links to each other, piston rod 15 simultaneously with guide bar 2 with the driver's cabin links to each other, piston rod 15 can be in the oil pocket of cylinder 14 is reciprocating motion.

In some preferred embodiments, the oil return path 11 includes: a main oil pipe 111 and a stroke valve 112; wherein,

a main oil pipe 111 communicating with the first pipe joint 12. And a stroke valve 112 provided in the main oil pipe 111, the stroke valve 112 being normally closed and shut-off. Optionally, a trigger boss 21 is provided on the guide rod 2, and the guide rod 2 may cooperate with the stroke valve 112 to conduct the main oil pipe 111 through a telescopic action.

It will be appreciated that after a certain travel of the guide rod 2, the trigger boss 21 cooperates with the travel valve 112 to conduct the main oil pipe 111. It should be noted that, when the trigger boss 21 is triggered and the oil return port 53 is also communicated with the oil tank 4 through the reversing portion 3, the main oil pipe 111 can discharge oil to the oil tank 4.

The working principle of the overturning driving system of the cab comprises the following steps:

ascending one-position working principle: when the reversing lever 32 is in the ascending position, the reversing valve 31 enables the first port 51 and the second port 52 to be communicated with a high-pressure oil path, and the oil return port 53 is communicated with the oil storage tank 4. The rocker arm 57 is rotated to drive the cam 54 and the plunger 56 to reciprocate to form high-pressure oil, the high-pressure oil flows to the first connector 51 and the second connector 52 and is transmitted to the first pipe connector 12 and the second pipe connector 13 of the turnover oil cylinder assembly through the hydraulic system accessory oil pipe, one path of the high-pressure oil enters the rodless cavity through the second pipe connector 13 and the hydraulic control one-way valve, the other path of the high-pressure oil enters the rod cavity of the piston cylinder assembly 1 through the first pipe connector 12, the travel valve 112 is in a normally closed state, hydraulic oil cannot pass through the valve, the piston rod 15 drives the guide rod 2 (comprising the trigger boss 21) to extend under the action of the high-pressure oil, the cab starts to turn over, when the guide rod 2 extends to a fixed position (when the cab turns over to a first angle), the trigger boss 21 acts on the travel valve 112, the travel valve 112 is opened to communicate the main oil pipe 111 with the oil return interface 53, the hydraulic oil flows back to the oil storage tank 4 through the oil return interface 53, the turnover oil pump cannot form high-pressure oil to drive the oil cylinder to work anyway, the cab turning over position is fixed at a first angle, and an operator can check and maintain the vehicle daily.

Ascending two-position working principle: when the reversing lever 32 is in the raised position, the reversing valve 31 is in the first pipe joint 12 and the second pipe joint 13 to connect the high-pressure oil passage, and the oil return port 53 is closed from the oil tank 4. The flow path of the hydraulic oil is the same as the ascending 1 position, and the difference is that the trigger boss 21 on the guide rod 2 acts on the stroke valve 112 and then is communicated with the main oil pipe 111 and the oil return interface 53, the return passage of the oil return interface 53 of the overturning hydraulic oil pump is closed, the system forms high-pressure oil to drive the cylinder piston rod 15 to extend, the cab continues to overturn to the maximum stroke position of the cylinder, and at the moment, the cab is fixed at a second angle, so that large parts are conveniently hoisted and maintained.

Descending working principle: when the reversing lever 32 is in the descending position, the reversing valve 31 is positioned at the first interface 51 to be communicated with the high-pressure oil path, the second interface 52 is directly communicated with the oil storage tank 4, and the oil return interface 53 and the oil storage tank 4 are closed. The rocker arm 57 is rotated to drive the cam 54 and the plunger 56 to reciprocate to form high-pressure oil, the high-pressure oil flowing to the first connector 51 is transmitted to the first pipe joint 12 through the hydraulic system accessory oil pipe, the hydraulic control one-way valve is opened by one path of the high-pressure oil passing through the first pipe joint 12, the rod cavity is opened by one path of the high-pressure oil, the return passage of the main oil pipe 111 of the turnover hydraulic oil pump is normally closed, no matter whether the stroke valve 112 is opened or not, hydraulic oil cannot flow back through the oil return connector 53, the high-pressure oil acts on the rod cavity, the piston rod 15 starts to retract, the hydraulic oil of the rodless cavity flows to the second pipe joint 13 through the opened hydraulic control one-way valve, and the cab of the piston rod 15 starts to descend until the cab normally falls and locks.

In a second aspect, the present application provides an automobile comprising: a hydraulic tumble drive system, the apparatus comprising: a turnover oil cylinder assembly and a turnover oil pump assembly; wherein,

the overturning oil cylinder assembly is connected with a part to be overturned, the overturning oil cylinder assembly can be switched to a first lifting state or a second lifting state according to the difference of telescopic strokes of the movable parts of the overturning oil cylinder assembly, when the overturning oil cylinder assembly is switched to the first lifting state, the cab is overturned at a first angle, when the overturning oil cylinder assembly is switched to the second lifting state, the cab is overturned at a second angle, and the second angle is larger than the first angle. The turnover oil pump assembly is provided with a plurality of oil ways communicated with the turnover oil cylinder assembly, the turnover oil pump assembly is provided with a reversing part 3, and the reversing part 3 can control the telescopic travel of the turnover oil cylinder assembly by adjusting the on-off of the oil way of the turnover oil pump assembly so as to drive the cab to turn over at a first angle or turn over at a second angle.

It can be understood that in the embodiment of the application, the cab is turned over by two different angles by controlling the switching of the oil way of the hydraulic system so as to change the difference of the telescopic travel of the oil cylinder, and when the cab is turned over to the first angle, a user can carry out daily maintenance on the cab. When the user prepares to carry out the major possession maintenance, user accessible switching-over portion 3 switches upset hydro-cylinder assembly and gets into the second and rises the position state, and the driver's cabin is continued to overturn to the second angle by first angle this moment, and the second angle is greater than first angle to the convenience of customers carries out the major possession maintenance to the driver's cabin, has improved user's use experience.

In some specific embodiments, as shown in fig. 1, 4 and 5, the tilt cylinder assembly includes: the device comprises a piston cylinder assembly 1, an oil return oil way 11 and a guide rod 2, wherein the piston cylinder assembly 1 is communicated with the oil return oil way 11, a movable part of the piston cylinder assembly 1 is connected with a cab, the oil return oil way 11 is in a normally closed and cut-off state, the guide rod 2 is movably connected with the piston cylinder assembly 1, and the guide rod 2 can movably conduct the oil return oil way 11; wherein,

when the turnover oil cylinder assembly is switched to the first lifting state, the movable part of the piston cylinder assembly 1 performs reciprocating motion, and drives the cab and the guide rod 2 to operate until the guide rod 2 is conducted with the oil return path 11 so as to discharge high-pressure oil in the piston cylinder assembly 1, the cab stops turning and is kept at the first angle, when the turnover oil cylinder assembly is switched from the first lifting state to the second lifting state, the oil return path 11 is blocked from the oil path of the turnover oil pump assembly, the movable part of the piston cylinder assembly 1 performs reciprocating motion again, and drives the cab to perform turning motion until the piston cylinder assembly 1 reaches the maximum turning stroke, and the cab stops turning and is kept at the second angle.

It should be noted that, there are rod cavities (referred to as piston rod 15) and rodless cavities in the oil cavity of the piston cylinder assembly 1, and the overturning oil pump assembly inputs high-pressure oil into the piston cylinder assembly 1 and then enters the rod cavities and rodless cavities at the same time, and the pressure difference is formed due to the different pressures of the two cavities after oil injection, so as to drive the piston rod 15 to reciprocate. Further, when the piston cylinder assembly 1 is in the first lifting state, the cab is turned over by the precursor, the guide rod 2 stretches out along with the cab, when the guide rod 2 moves and is in trigger fit with the oil return oil path 11, the oil return oil path 11 is conducted, high-pressure oil in the piston cylinder assembly 1 is discharged through the oil return oil path 11, the piston cylinder assembly 1 loses power and does not execute reciprocating motion, and the cab stops turning over. Therefore, the first angle of the cab turning can be adjusted by designing the stroke length of the guide rod 2 and the oil return path.

In some specific embodiments, as shown in fig. 2 and 3, the reverse oil pump assembly includes: an oil storage tank 4 and a pump body 5; wherein,

the pump body 5 with the oil storage tank 4 links to each other, be equipped with first interface 51 and return oil interface 53 on the pump body 5, first interface 51 pass through switching-over portion 3 with the oil delivery oil circuit of the pump body 5 links to each other, return oil interface 53 passes through switching-over portion 3 with the oil storage tank 4 links to each other.

Further, a second interface 52 is provided on the pump body 5, the second interface 52 may be communicated with the oil delivery path of the pump body 5 through the reversing portion 3 or directly communicated with the oil storage tank 4, and the reversing portion 3 is configured to be sequentially switched to an ascending one position, an ascending two position and a descending position; wherein,

when the reversing part 3 is switched to the ascending position, the oil return port 53 is communicated with the oil storage tank 4, the pump body 5 is used for conveying high-pressure oil to the piston cylinder assembly 1 through the first port 51 and the second port 52, when the reversing part 3 is switched to the ascending position, the oil return port 53 and the oil storage tank 4 are in a cut-off state, the pump body 5 is used for conveying oil to the piston cylinder assembly 1 through the first port 51 and the second port 52, and when the reversing part 3 is switched to the descending position, the oil return port 53 and the oil storage tank 4 are in a cut-off state, the pump body 5 is used for conveying oil to the piston cylinder assembly 1 through the first port 51, one end of the second port 52 is communicated with the oil storage tank 4, and the other end of the second port 52 is communicated with the piston cylinder assembly 1 so as to discharge the high-pressure oil in the oil cavity of the piston cylinder assembly 1.

It can be understood that the reversing portion 3 can control the cut-off or on states of the first interface 51, the second interface 52 and the oil return interface 53, so as to drive the overturning angle of the cab.

Specifically, as shown in fig. 2 and 3, the reversing section 3 includes: a reversing valve 31 and a reversing lever 32; wherein,

and the reversing valve 31 is connected with the first port 51, the second port 52 and the oil return port 53. A reversing lever 32 connected to the reversing valve 31.

In some embodiments, as shown in fig. 1, the piston cylinder assembly 1 is provided with a first pipe joint 12 (as a port B in fig. 1) and a second pipe joint 13 (as a port a in fig. 1), and the first pipe joint 12 and the second pipe joint 13 are respectively abutted with the first interface 51 and the second interface 52.

Further, as shown in fig. 1, the piston-cylinder assembly 1 includes: the cylinder 14, its oil pocket is equipped with piston rod 15, piston rod 15 with guide bar 2 links to each other, piston rod 15 simultaneously with guide bar 2 with the driver's cabin links to each other, piston rod 15 can be in the oil pocket of cylinder 14 is reciprocating motion.

In some preferred embodiments, the oil return path 11 includes: a main oil pipe 111 and a stroke valve 112; wherein,

a main oil pipe 111 communicating with the first pipe joint 12. And a stroke valve 112 provided in the main oil pipe 111, the stroke valve 112 being normally closed and shut-off. Optionally, a trigger boss 21 is provided on the guide rod 2, and the guide rod 2 may cooperate with the stroke valve 112 to conduct the main oil pipe 111 through a telescopic action.

It will be appreciated that after a certain travel of the guide rod 2, the trigger boss 21 cooperates with the travel valve 112 to conduct the main oil pipe 111. It should be noted that, when the trigger boss 21 is triggered and the oil return port 53 is also communicated with the oil tank 4 through the reversing portion 3, the main oil pipe 111 can discharge oil to the oil tank 4.

In summary, in the embodiment of the application, the two different angles of cab overturning and the cab descending overturning are realized by controlling the switching of the oil way of the hydraulic system so as to change the difference of the telescopic travel of the oil cylinder, so that the purposes of daily maintenance and large-piece maintenance of a user are simultaneously adapted, the use experience of the user is improved, and the operation of the user is convenient. In addition, the application can realize the overturn control of two angles and the descent of the cab only by one set of overturn system, thereby improving the integration level of the device and facilitating the overhaul of personnel.

In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present application and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that in the present application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A roll-over drive system for a cab, comprising:

the overturning oil cylinder assembly is connected with a part to be overturned, the overturning oil cylinder assembly can be switched to a first lifting state or a second lifting state according to different telescopic strokes of the movable part of the overturning oil cylinder assembly, when the overturning oil cylinder assembly is switched to the first lifting state, the cab is overturned at a first angle, and when the overturning oil cylinder assembly is switched to the second lifting state, the cab is overturned at a second angle, and the second angle is larger than the first angle;

the turnover oil pump assembly is provided with a plurality of oil ways communicated with the turnover oil cylinder assembly, the turnover oil pump assembly is provided with a reversing part (3), and the reversing part (3) can control the telescopic travel of the turnover oil cylinder assembly by adjusting the on-off of the oil way of the turnover oil pump assembly so as to drive the cab to turn over at a first angle or turn over at a second angle.

2. The roll-over drive system of claim 1, wherein the roll-over ram assembly comprises: the device comprises a piston cylinder assembly (1), an oil return path (11) and a guide rod (2), wherein the piston cylinder assembly (1) is communicated with the oil return path (11), a movable part of the piston cylinder assembly (1) is connected with a cab, the oil return path (11) is in a normally closed and cut-off state, the guide rod (2) is movably connected with the piston cylinder assembly (1), and the guide rod (2) can movably conduct the oil return path (11); wherein,

when the turnover oil cylinder assembly is switched to the first lifting state, the movable part of the piston cylinder assembly (1) performs reciprocating motion, meanwhile, the cab and the guide rod (2) are driven to operate until the guide rod (2) is communicated with the oil return path (11) so as to discharge high-pressure oil in the piston cylinder assembly (1), the cab stops turning and is kept at the first angle, when the turnover oil cylinder assembly is switched from the first lifting state to the second lifting state, the oil return path (11) and the oil path of the turnover oil pump assembly are cut off, the movable part of the piston cylinder assembly (1) performs reciprocating motion again, and the cab is driven to perform turnover motion until the piston cylinder assembly (1) reaches the maximum turnover stroke, and the cab stops turning and is kept at the second angle.

3. The roll-over drive system of claim 2, wherein the roll-over oil pump assembly comprises:

an oil storage tank (4);

the oil storage device comprises a pump body (5), wherein the pump body (5) is connected with an oil storage tank (4), a first interface (51) and an oil return interface (53) are arranged on the pump body (5), the first interface (51) is connected with an oil conveying oil way of the pump body (5) through a reversing part (3), and the oil return interface (53) is connected with the oil storage tank (4) through the reversing part (3).

4. A roll-over drive system according to claim 3, wherein: the pump body (5) is provided with a second interface (52), the second interface (52) can be communicated with an oil conveying way of the pump body (5) through the reversing part (3) or directly communicated with the oil storage tank (4), and the reversing part (3) is configured to be sequentially switched to an ascending one position, an ascending two position and a descending position; wherein,

when the reversing part (3) is switched to the ascending position, the oil return interface (53) is communicated with the oil storage tank (4), the pump body (5) is used for conveying high-pressure oil to the piston cylinder assembly (1) through the first interface (51) and the second interface (52), when the reversing part (3) is switched to the ascending position, the oil return interface (53) is in a cut-off state with the oil storage tank (4), the pump body (5) is used for conveying oil to the piston cylinder assembly (1) through the first interface (51) and the second interface (52), when the reversing part (3) is switched to the descending position, the oil return interface (53) is in a cut-off state with the oil storage tank (4), one end of the pump body (5) is communicated with the oil storage tank (4) through the first interface (51), and the other end of the second interface (52) is communicated with the piston cylinder assembly (1) so as to discharge the high-pressure oil in the piston cylinder assembly (1).

5. The tumble drive system according to claim 4 wherein the reversing section (3) includes:

the reversing valve (31) is connected with the first interface (51), the second interface (52) and the oil return interface (53);

and a reversing lever (32) connected to the reversing valve (31).

6. The tumble drive system as set forth in claim 5 wherein:

the piston cylinder assembly (1) is provided with a first pipe joint (12) and a second pipe joint (13), and the first pipe joint (12) and the second pipe joint (13) are respectively in butt joint with the first interface (51) and the second interface (52).

7. The tumble drive system according to claim 6 wherein said piston-cylinder assembly (1) comprises:

the cylinder (14) is provided with a piston rod (15) in an oil cavity, the piston rod (15) is connected with the guide rod (2), the piston rod (15) is simultaneously connected with the guide rod (2) and the cab, and the piston rod (15) can reciprocate in the oil cavity of the cylinder (14).

8. The tumble drive system according to claim 7, characterized in that said return oil passage (11) includes:

a main oil pipe (111) communicating with the first pipe joint (12);

and a stroke valve (112) provided to the main oil pipe (111), wherein the stroke valve (112) is in a normally closed off state.

9. The overturn driving system according to claim 8, wherein the guide rod (2) is provided with a trigger boss (21), and the guide rod (2) can cooperate with the stroke valve (112) to conduct the main oil pipe (111) through telescopic action.

10. An automobile, comprising: a hydraulic tumble drive system according to any one of claims 1-9.