阅读说明：本技术 一种模块化的全地面起重机用分动箱 (Transfer case for modular all-terrain crane ) 是由 詹东安 唐恒 梁兰兰 张青峰 于 2021-11-30 设计创作，主要内容包括：本发明公开一种模块化的全地面起重机用分动箱,分动箱基础模块单元包括端口一、端口二、端口三和端口四,分扭模块安装在端口三和端口四之间,贯通主减模块或脱桥主减模块插入安装在端口二处,取力器模块插入安装在端口一处。采用不同的功能模块,满足不同使用工况的作业需要,有利于降低研发成本。(The invention discloses a modular transfer case for an all-terrain crane, wherein a transfer case basic module unit comprises a port I, a port II, a port III and a port IV, a torsion dividing module is arranged between the port III and the port IV, a through main reducing module or an off-bridge main reducing module is inserted and arranged at the port II, and a power takeoff module is inserted and arranged at the port I. Different functional modules are adopted, the operation requirements of different use working conditions are met, and the research and development cost is favorably reduced.)

1. A transfer case for a modular all-terrain crane comprises a transfer case basic module unit, wherein the transfer case basic module unit comprises an input shaft system assembly, a middle shaft system assembly and an output shaft system torque splitting device, the input shaft system assembly, the middle shaft system assembly and the output shaft system torque splitting device are distributed in parallel from top to bottom, a front output assembly is arranged at the left end of the output shaft system torque splitting device, a rear output assembly is arranged at the right end of the output shaft system torque splitting device, the right end of the middle shaft system assembly is provided with a port I (20), a port II (21) is arranged between the front output assembly and the output shaft system torque splitting device, a port III (22) and a port IV (23) are arranged between the rear output assembly and the output shaft system torque splitting device, and the transfer case is characterized by further comprising at least one of a power takeoff module (2), a torque splitting module (3), a through main reducing module (4) and an off-bridge main reducing module (5),

the torque splitting module (3) is arranged between the third port (22) and the fourth port (23) and is used for increasing the torque splitting ratio of the whole ground crane;

the through main reducing module (4) is inserted and installed at the second port (21) and is used for shortening the length of the whole chassis of the all-terrain crane;

the bridge-off main reducing module (5) is inserted and installed at the second port (21) and is used for increasing the driving force of the whole all-terrain crane when the whole all-terrain crane is on an uneven road or in a climbing working condition;

and the power takeoff module (2) is inserted and installed at the first port (20) and is used for providing power for a rotary table, an arm support and a winch of the all-terrain crane.

2. The transfer case for a modular all-terrain crane of claim 1, wherein,

the transfer case foundation module unit comprises a cylinder control device, a plurality of bearings and a transfer case main shell, wherein the input shaft assembly, the middle shaft assembly and the output shaft torque splitting device are respectively connected with the transfer case main shell through the bearings,

the input shaft system assembly comprises an end face flange, an input shaft, a first gear (11), a second gear (12) and a first gear shifting mechanism (16), wherein an inner ring of the first gear (11) and an inner ring of the second gear (12) are connected with the input shaft through a bearing, the first gear shifting mechanism (16) is a bidirectional gear shifting mechanism, a spline of the first gear shifting mechanism (16) is normally meshed with the input shaft, and the input shaft, the first gear (11), the first gear shifting mechanism (16) and the second gear (12) are sequentially distributed from left to right;

the input shaft is connected with power input transmitted from the gearbox through an end face flange, the cylinder control device controls the first gear shifting mechanism (16) to move, the radius of a root circle of the first gear (11) is smaller than that of a root circle of the second gear (12), and the first gear shifting mechanism (16) moves leftwards to be combined with the first gear (11) during working, so that the first gear (11) is fixedly connected with the input shaft, and at the moment, the first gear shifting mechanism is in a low-speed gear state; the first gear shifting mechanism (16) moves rightwards to be combined with the second gear (12) to realize the fixed connection of the second gear (12) and the input shaft, and the high-speed gear state is realized at the moment.

3. The transfer case for a modular all-terrain crane of claim 2, wherein,

the middle shafting assembly comprises a second shaft, a third gear (13), a fourth gear (14) and a second gear shifting mechanism (17), wherein the inner ring of the third gear (13) is connected with the second shaft through a bearing, the third gear (13) is normally meshed with the first gear (11), the inner ring of the fourth gear (14) is connected with the second shaft through a bearing, the fourth gear (14) is normally meshed with the second gear (12), the second gear shifting mechanism (17) is a one-way gear shifting mechanism, the second gear shifting mechanism (17) is installed on the second shaft, the second gear shifting mechanism (17) is located between the third gear (13) and the fourth gear (14), and the right end of the second shaft is provided with a first port (20);

the radius of the root circle of the gear III (13) is larger than that of the root circle of the gear II (12),

the cylinder control device controls the shift mechanism II (17) to move, and the shift mechanism II (17) moves left and right to realize the disengagement and combination of the gear III (13) and the second shaft;

and the second gear shifting mechanism (17) is normally positioned at the left position and is used for ensuring that the third gear (13) and the second shaft are in a normally fixed connection state.

4. The transfer case for a modular all-terrain crane of claim 3, wherein,

the output shaft system torque splitting device comprises a fifth gear (15) and a first differential lock (18), a front output shaft assembly, a second port (21), a first differential lock (18) and a third port (22) are sequentially connected, a fourth port (23) is connected with a rear output shaft assembly, the fifth gear (15) is normally meshed with the third gear (13), the first differential lock (18) is in a normally open state, the speed ratio of a transmission line of the second gear (12) → the fourth gear (14) → the third gear (13) → the fifth gear (15) is smaller than 1 in a high-speed gear state, and the speed ratio of the transmission line of the first gear (11) → the third gear (13) → the fifth gear (15) is larger than 1 in a low-speed gear state.

5. The transfer case for a modular all-terrain crane of claim 4, wherein,

the torque distribution module (3) comprises a front output shaft, a rear output shaft, a spacer, a planet carrier, a planet wheel, a planet shaft, a sun wheel and a gear ring,

the front output shaft is fixedly connected with the sun gear, the output torque of the front output shaft is 1/3 of the total output torque of the torque splitting module (3), the rear output shaft is fixedly connected with the gear ring, the gear ring and the sun gear respectively output power to the output shaft (6) of the front output shaft assembly and the output shaft of the rear output shaft assembly according to the torque ratio of 2:1, and the output torque of the gear ring and the sun gear is 2/3 of the total output torque of the torque splitting module (3);

the planet gear is fixedly connected with a fifth gear (15), and is in interference fit with the planet carrier through a planet shaft and used for positioning in the circumferential direction of the planet gear; the planet gear is axially limited in the planet carrier in the tooth width direction through a spacer and is used for axially positioning the planet gear;

the gear ring is fixedly connected with a third port (22), and the sun wheel is fixedly connected with a fourth port (23).

6. The transfer case for a modular all-terrain crane of claim 5, wherein,

the front-rear torque distribution ratio of the torque distribution module (3) is 2: 1.

7. The transfer case for a modular all-terrain crane of claim 3, wherein,

the power takeoff module (2) comprises a third gear shifting mechanism (24) and a power takeoff (25), the third gear shifting mechanism (24) is fixedly connected with the second shaft, the third gear shifting mechanism (24) and the power takeoff (25) are in a normally separated state,

when the all-terrain crane works, the cylinder control device controls the third gear shifting mechanism (24) to move, so that the power takeoff (25) is fixedly connected with the second shaft and used for providing power for a rotary table, an arm support and a winch of the all-terrain crane.

8. The transfer case for a modular all-terrain crane of claim 4, wherein,

the through main reduction module (4) comprises a gear six (31), a gear seven (32), a gear eight (33), a gear nine (34), a differential lock two (41), a differential lock two (42), a differential lock three (43), a differential lock three (44), a through shaft (45), an output half shaft one (47) and an output half shaft two (48),

the front output shaft assembly, the second differential (42), the through shaft (45) and the first differential lock (18) are sequentially connected, the second differential lock (41) is installed on the second differential (42), the sixth gear (31) is fixedly connected with a shell of the second differential (42), the sixth gear (31) is normally meshed with the seventh gear (32), the seventh gear (32) is coaxially and fixedly connected with the eighth gear (33) and is used for changing the transmission direction of the whole torque, the eighth gear (33) is normally meshed with the ninth gear (34), the ninth gear (34) is fixedly connected with a shell of the third differential (44), the third differential (44) is fixedly connected with the first output half shaft (47) and the second output half shaft (48) respectively, and the third differential lock (43) is installed on the third differential (44) close to one side of the first output half shaft (47),

the eight gear (33) and the nine gear (34) are helical gears, the through shaft (45) transmits part of power to the third port (22), and the through shaft (45) transmits the rest of power to the first output half shaft (47) and the second output half shaft (48) through the eight gear (33) and the nine gear (34) pair;

and an air source of the cylinder control device enables the spline sleeve external spline of the differential lock II (41) to be jointed with the spline in the differential mechanism II (42) shell, and is used for enabling the power 1:1 an output shaft (6) distributed to a front output shaft assembly transmits power along a route of six gears (31) to seven gears (32) to eight gears (33) to nine gears (34) to a first output half shaft (47) and a second output half shaft (48);

and an air source of the air cylinder control device enables external splines of a spline sleeve of the differential lock III (43) to be jointed with internal splines of a shell of the differential mechanism III (44) to realize rigid connection of the output half shaft I (47) and the output half shaft II (48), wherein the output half shaft I (47) and the output half shaft II (48) are positioned on two sides of wheels of the all-terrain crane.

9. The transfer case for a modular all-terrain crane of claim 4, wherein,

the off-bridge main reducing module (5) comprises a gear ten (50), a gear eleven (51), a gear twelve (52), a gear thirteen (53), a differential lock four (54), a differential lock five (55), a differential mechanism five (56), an output half shaft three (57), an output half shaft four (58) and a through shaft two (59),

the through shaft II (59) is fixedly connected with an output shaft (6) of the front output assembly, the gear III (50) is fixedly connected with the differential lock IV (54), the gear IV (50) is normally meshed with the gear IV (51), the gear IV (51) is coaxially and fixedly connected with the gear IV (52), the gear IV (52) is normally meshed with the gear IV (53), the gear IV (52) and the gear IV (53) are helical gears, the gear IV (53) is fixedly connected with a shell of the differential mechanism V (56), and the front output end and the rear output end of the differential mechanism V (56) are respectively connected with the output half shaft IV (58) and the output half shaft III (57);

when the whole all-terrain crane is in an uneven road or climbing working condition, the gear ten (50) is fixedly connected with the through shaft two (59) through the differential lock four (54), and the spline sleeve external spline of the differential lock five (55) is engaged with the spline in the differential mechanism five (56) shell, so that the rigid connection of the output half shaft three (57) and the output half shaft four (58) is realized.

10. An all-terrain crane having mounted thereon the transfer case for an all-terrain crane according to claim 1.

Technical Field

The invention relates to a modular transfer case for an all-terrain crane, and belongs to the technical field of transfer cases.

Background

The through main reduction is a disconnected drive axle main reducer comprising an inter-axle differential and a through shaft; the off-axle main reducer is only a through shaft and is a disconnected drive axle main reducer without an inter-axle differential; the power takeoff is an auxiliary power output mechanism which provides power for mechanisms such as a crane rotary table, a boom, a winch and the like during hoisting operation.

The all-terrain crane is a high-end product of crane machinery, has the advantages of high-speed running and high off-road performance, and is widely applied to the fields of major projects such as wind power, oil fields and petrifaction. The transfer case is a key core component of the ground transmission system of the all-terrain crane and is arranged between the gearbox and the drive axle, the input shaft of the transfer case is connected with the power of the output end of the gearbox, the front and rear output ends of the transfer case are connected with the main speed reducers of the front and rear drive axles of the whole machine, and the transmission speed ratio and the transmission route of the ground transmission system of the whole machine are adjusted through the combination of different speed ratio gears in the transfer case, so that different use working conditions are met, and the economy of the whole machine is ensured.

At present, the product model distribution range of domestic all-terrain cranes is 40-1600 tons, the quantity distribution range of mechanical drive axles of the chassis of the whole crane is 2-6 axles, the types of transmission systems of the chassis of the whole crane are dispersed, the configured transfer cases have more product models, the annual demand of the transfer case with a single model is small, and great difficulty is brought to the production organization of the whole crane.

A modularized energy-saving environment-friendly power take-off transfer case for a single-engine special vehicle-CN 201810101285.6 discloses a modularized energy-saving environment-friendly power take-off transfer case for the single-engine special vehicle, which utilizes a lower power take-off mode to replace a commonly used auxiliary engine, reduces the fuel consumption and the exhaust emission of the whole machine, is convenient for arrangement of an operation device, improves the space utilization rate, has low self efficiency, is convenient to operate, and reduces the workload of a universal power take-off transfer case with excellent research and development performance.

A clutch transfer case for a special vehicle, patent No. ZL201620397820.3, is disclosed, and is also only suitable for special vehicle types, and has no universal adaptability and energy-saving and environment-friendly characteristics.

The prior art only provides the power demand scheme that different motorcycle types realize whole car function, but mutual independence between each product does not have the characteristics that realize multiple functions and satisfy the general demand of different vehicles through module combination, and the product does not have energy-concerving and environment-protective characteristic.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a modular transfer case for an all-terrain crane. The transfer case has the advantages that various combinations exist among the functions, the transfer case is beneficial to the shape unification of the transfer case products, the situation that a whole chassis transmission system and the number of the transfer case are large, the loading amount of a single-model transfer case product is small, the application and popularization of the transfer case and the cost reduction of the whole transfer case are not facilitated is avoided, and the enterprise cost is greatly reduced.

In order to achieve the above purpose, the invention provides a modular transfer case for an all-terrain crane, which comprises a transfer case basic module unit, wherein the transfer case basic module unit comprises an input shaft system assembly, a middle shaft system assembly and an output shaft system torque splitting device, the input shaft system assembly, the middle shaft system assembly and the output shaft system torque splitting device are distributed in parallel from top to bottom, a front output assembly is arranged at the left end of the output shaft system torque splitting device, a rear output assembly is arranged at the right end of the output shaft system torque splitting device, the right end of the middle shaft system assembly is provided with a port I, a port II is arranged between the front output assembly and the output shaft system torque splitting device, a port III and a port IV are arranged between the rear output assembly and the output shaft system torque splitting device, and the transfer case further comprises at least one of a power takeoff module, a torque splitting module, a through main torque reducing module and a bridge-off main reducing module,

the torsion dividing module is arranged between the third port and the fourth port and is used for increasing the torsion dividing ratio of the whole ground crane;

the through main reducing module is inserted into the second port and is used for shortening the length of the whole chassis of the all-terrain crane;

the bridge-off main reducing module is inserted into the second port and used for increasing the driving force of the whole all-terrain crane when the whole all-terrain crane is in an uneven road surface or a climbing working condition;

the power takeoff module is inserted into the first port and used for providing power for a rotary table, an arm support and a winch of the all-terrain crane.

Preferably, the transfer case foundation module unit comprises an air cylinder control device, a plurality of bearings and a transfer case main shell, the input shaft assembly, the middle shaft assembly and the output shaft torque splitting device are respectively connected with the transfer case main shell through the bearings,

the input shaft system assembly comprises an end face flange, an input shaft, a first gear, a second gear and a first gear shifting mechanism, wherein an inner ring of the first gear and an inner ring of the second gear are connected with the input shaft through a bearing;

the input shaft is connected with power input transmitted from the gearbox through an end face flange, the cylinder control device controls the first gear shifting mechanism to move, the radius of a root circle of the first gear is smaller than that of a root circle of the second gear, and the first gear shifting mechanism moves leftwards and is combined with the first gear to realize the fixedly connection of the first gear and the input shaft, and at the moment, the first gear is in a low-speed gear state; the first gear shifting mechanism moves rightwards to be combined with the second gear, so that the second gear is fixedly connected with the input shaft and is in a high-speed gear state.

Preferentially, the middle shafting assembly comprises a second shaft, a third gear, a fourth gear and a second gear shifting mechanism, wherein an inner ring of the third gear is connected with the second shaft through a bearing, the third gear is normally meshed with the first gear, an inner ring of the fourth gear is connected with the second shaft through a bearing, the fourth gear is normally meshed with the second gear, the second gear shifting mechanism is a one-way gear shifting mechanism, the second gear shifting mechanism is arranged on the second shaft, the second gear shifting mechanism is positioned between the third gear and the fourth gear, and the right end of the second shaft is provided with a first port;

the radius of the gear three-tooth root circle is larger than that of the gear two-tooth root circle,

the cylinder control device controls the shift mechanism II to move, and the shift mechanism II moves left and right to realize the disengagement and combination of the gear III and the second shaft;

and the second gear shifting mechanism is normally positioned at the left position and is used for ensuring that the third gear and the second shaft are in a normally fixed connection state.

Preferably, the output shaft system torque distribution device comprises a fifth gear and a first differential lock, the front output shaft assembly, the second port, the first differential lock and the third port are sequentially connected, the fourth port is connected with the rear output shaft assembly, the fifth gear is normally meshed with the third gear, the first differential lock is in a normally open state, the speed ratio of a transmission route of the second gear → the fourth gear → the third gear → the fifth gear is smaller than 1 in a high-speed gear state, and the speed ratio of the transmission route of the first gear → the third gear → the fifth gear is larger than 1 in a low-speed gear state.

Preferably, the torsion-dividing module comprises a front output shaft, a rear output shaft, a spacer, a planet carrier, a planet wheel, a planet shaft, a sun wheel and a gear ring,

the front output shaft is fixedly connected with the sun gear, the output torque of the front output shaft is 1/3 of the total output torque of the torque splitting module, the rear output shaft is fixedly connected with the gear ring, the gear ring and the sun gear respectively output power to the output shaft of the front output shaft assembly and the output shaft of the rear output shaft assembly in a torque ratio of 2:1, and the output torque of the gear ring and the sun gear is 2/3 of the total output torque of the torque splitting module;

the planet gear is fixedly connected with the gear V, and is in interference fit with the planet carrier through a planet shaft and used for positioning in the circumferential direction of the planet gear; the planet gear is axially limited in the planet carrier in the tooth width direction through a spacer and is used for axially positioning the planet gear;

the gear ring is fixedly connected with a third port, the sun wheel is fixedly connected with a fourth port, and the front-rear torque splitting ratio of the torque splitting module is 2: 1.

Preferably, the power takeoff module comprises a third gear shifting mechanism and a power takeoff, the third gear shifting mechanism is fixedly connected with the second shaft, the third gear shifting mechanism and the power takeoff are in a normally separated state,

when the all-terrain crane works, the cylinder control device controls the shifting mechanism III to move, so that the power takeoff is fixedly connected with the second shaft and used for providing power for a rotary table, an arm support and a winch of the all-terrain crane.

Preferably, the through main reducing module comprises a gear six, a gear seven, a gear eight, a gear nine, a differential lock two, a differential lock three, a through shaft, an output half shaft one and an output half shaft two,

the front output shaft assembly, the second differential mechanism, the through shaft and the first differential lock are sequentially connected, the second differential lock is installed on the second differential mechanism, the sixth gear is fixedly connected with the second differential mechanism shell, the sixth gear is normally meshed with the seventh gear, the seventh gear is coaxially and fixedly connected with the eighth gear for changing the transmission direction of the whole torque, the eighth gear is normally meshed with the ninth gear, the ninth gear is fixedly connected with the third differential mechanism shell, the third differential mechanism is respectively and fixedly connected with the first output half shaft and the second output half shaft, the third differential lock is installed on the third differential mechanism close to one side of the first output half shaft,

the eight gear and the nine gear are helical gears, the through shaft transmits part of power to the third port, and the through shaft transmits the rest power to the first output half shaft and the second output half shaft through the eight gear and the nine gear pair;

and an air source of the cylinder control device enables external splines of the spline housing of the second differential lock to be jointed with internal splines of the second differential shell, and the air source is used for connecting the power 1:1, distributing the power to an output shaft of a front output shaft assembly, and transmitting power along a route of a gear six to a gear seven to a gear eight to a gear nine to an output half shaft I and an output half shaft II;

and an air source of the air cylinder control device enables external splines of a spline sleeve of the differential lock III to be jointed with internal splines of a differential mechanism tri-shell, so that the output half shaft I and the output half shaft II are rigidly connected, and the output half shaft I and the output half shaft II are positioned on two sides of wheels of the all-terrain crane.

Preferably, the off-bridge main reducing module comprises a gear ten, a gear eleven, a gear twelve, a gear thirteen, a differential lock four, a differential lock five, a differential mechanism five, an output half shaft three, an output half shaft four and a through shaft two,

the through shaft II is fixedly connected with an output shaft of the front output assembly, the gear ten is fixedly connected with the differential lock IV, the gear ten is normally meshed with the gear eleven, the gear eleven is coaxially and fixedly connected with the gear twelve, the gear twelve is normally meshed with the gear thirteen, the gear twelve and the gear thirteen are both helical gears, the gear thirteen is fixedly connected with a shell of a differential mechanism V, and the front output end and the rear output end of the differential mechanism V are respectively connected with an output half shaft IV and an output half shaft III;

when the whole all-terrain crane is in an uneven road or climbing working condition, the gear ten is fixedly connected with the through shaft two through the differential lock four, and the spline sleeve external spline of the differential lock five is engaged with the spline in the differential mechanism five shell, so that the rigid connection of the output half shaft three and the output half shaft four is realized.

Preferably, the above-described transfer case for an all terrain crane is mounted on the all terrain crane.

The invention achieves the following beneficial effects:

the invention relates to a modular transfer case for an all-terrain crane, which is characterized in that a power takeoff module, a torque splitting module, a through main reducing module and an off-bridge main reducing module adopt modular design, all module units are combined and matched and are used for arranging chassis of the whole truck of different types of all-terrain cranes, and a transfer case basic unit module is a basic transfer case assembly with an output torque ratio of 1: 1; power takeoff module, link up and mainly subtract module, take off the bridge and mainly subtract module and 2: the 1 minute twist module is according to the different actual operation operating mode of hoist, through the combination replacement with transfer case basic unit module, realizes different power take off scheme and drive scheme, satisfies the operation needs of the different operating mode of the different motorcycle types of all-terrain crane, adopts this modular design, is favorable to shortening research and development cycle, reduces the research and development cost, the type of the transfer case product of being convenient for and popularization and application in the complete machine.

Drawings

FIG. 1 is a block diagram of a transfer case base module unit;

FIG. 2 is a block diagram of the power take-off module of the present invention;

FIG. 3 is a block diagram of the insertion of the torque distribution module into the base module unit of the transfer case of the present invention;

FIG. 4 is a block diagram of the through main subtraction module inserted into the transfer case base module unit of the present invention;

FIG. 5 is a block diagram of the present invention disconnect bridge main drop module and torque distribution module simultaneously inserted into the transfer case base module unit;

FIG. 6 is a block diagram of the insertion of the power take-off module into the transfer case base module unit of the present invention;

FIG. 7 is a block diagram of the present invention through the main reduction module and power take off module inserted into the transfer case base module unit;

FIG. 8 is a block diagram of the present invention with the splitter module and power take-off module simultaneously inserted into the transfer case base module unit;

FIG. 9 is a block diagram of the simultaneous insertion of the de-bridging main reduction module, torque splitting module and power take-off module into the transfer case base module unit;

FIG. 10 is a block diagram of a torque splitting module according to the present invention;

FIG. 11 is a block diagram of the through main subtraction module of the present invention;

FIG. 12 is a block diagram of the de-bridging main subtraction module of the present invention.

Reference character means, 1-transfer case base module unit; 2-a power takeoff module; 3-a torque splitting module; 4-a through main subtraction module; 5-a bridge-off main reducing module; 6-an output shaft of the front output assembly; 11-gear one; 12-gear two; 13-gear three; 14-gear four; 15-gear five; 16-a first gear shift mechanism; 17-a second gear shift mechanism; 18-differential lock one; 19-a first differential; 20-port one; 21-port two; 22-port three; 23-port four; 24-shift mechanism three; 25-power takeoff; 31-gear six; 32-gear seven; 33-gear eight; 34-gear nine; 41-differential lock II; 42-differential II; 43-differential lock three; 44-differential three; 45-through shaft; 47-output half shaft one; 48-output half shaft two; 50-gear ten; 51-gear eleven; 52-Gear twelve; 53-gear thirteen; 54-differential lock four; 55-differential lock five; 56-differential mechanism five; 57-output half shaft three; 58-output half shaft four; 59-a second through shaft.

Detailed Description

The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

It should be noted that, if there is a directional indication (such as up, down, left, right, front, and back) in the embodiment of the present invention, it is only used to explain the relative position relationship between the components, the motion situation, and the like in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.

In addition, if the description of "a", "an", "two", etc. is referred to in this disclosure, it is used for descriptive purposes only and not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "a", "an", or "two" may explicitly or implicitly include at least one of the feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Example one

Referring to fig. 1, the transfer case basic module unit is a transfer case which comprises three parallel shafts distributed up and down, and specifically comprises an input shaft assembly, a middle shaft assembly and an output shaft torque splitting device, wherein the three parallel shafts are an input shaft, a second shaft and a third shaft, the input shaft assembly comprises an input shaft, a first gear, a second gear and a first gear shifting mechanism, and the first gear is a high-speed gear and a low-speed gear. The first gear is a small gear, the second gear is a large gear, the radius of a 11-tooth root circle of the first gear is smaller than that of a 12-tooth root circle of the second gear, and the first gear and the inner ring of the second gear are connected with the input shaft through a bearing; the first gear shifting mechanism is a bidirectional gear shifting mechanism, and the first gear shifting mechanism is normally meshed with the input shaft through a spline. The first gear shifting mechanism is combined with the first gear by moving leftwards, so that the first gear is fixedly connected with the input shaft, and a first shaft of the transfer case is in a low-gear state; the first gear shifting mechanism is combined with the second gear through moving rightwards, so that the second gear is fixedly connected with the input shaft, and at the moment, a first shaft of the transfer case is in a high-speed gear state.

The middle shafting assembly comprises a second shaft, a third gear, a fourth gear and a second gear shifting mechanism, wherein the third gear is a large gear, an inner ring of the third gear is connected with the second shaft through a bearing, and the third gear is normally meshed with the first gear. The fourth gear is a pinion, the fourth gear is fixedly connected with the second shaft, the fourth gear is normally meshed with the second gear, and the radius of the third 13 tooth root circle of the third gear is larger than that of the second 12 tooth root circle of the second gear. The second gear shifting mechanism is a one-way gear shifting mechanism, and the second gear shifting mechanism is separated from and combined with the third gear and the second shaft through left-right movement. And the second gear shifting mechanism is normally positioned at the left position, so that the third gear and the second shaft are ensured to be in a normally fixed connection state, and the right end of the second shaft is provided with a first port 20.

The output shaft system torque splitting device comprises a fifth gear, a first differential mechanism and a first differential lock. And a fifth gear is fixedly connected with the first differential shell, and an output shaft of the front output shaft assembly and an output shaft of the rear output shaft assembly are fixedly connected with a half-shaft gear of the differential respectively. The first differential is a differential structure with 1:1 torque output from the front and the rear of the transfer case, and realizes the differential function between the front output shaft assembly and the rear output shaft assembly. The differential lock I is a differential lock of the differential mechanism I and is in a normally open state. When the differential lock is combined with the differential mechanism, the differential mechanism is rigidly connected with the output shaft of the front output shaft assembly and the output shaft of the rear output shaft assembly, and the differential mechanism cannot realize the differential function.

The transfer case foundation module unit can meet the arrangement requirement of an all-terrain crane with double engines and 2-6 mechanical drive axles, and at the moment, the front output assembly is connected with the front drive axle, and the front drive axle and other drive axles output power; the rear output assembly is connected with the rear drive axle and outputs power to the rear drive axle and other drive axles.

The transfer case basic module unit mainly has the function of transmitting power output by the gearbox to the drive axle so as to drive the whole vehicle to run. The transfer case basic module unit is provided with two gears of a high gear and a low gear, wherein the high gear is an acceleration gear, and the low gear is a deceleration gear. The driving condition gears and the power trend are as follows: when the transfer case assembly runs at a high gear, the first gear shifting mechanism moves rightwards to enable the input shaft to be fixedly connected with the second gear, the second gear shifting mechanism moves leftwards to enable the second shaft to be fixedly connected with the third gear, and the power flow of the axle case is that the input shaft → the first gear shifting mechanism → the second gear → the fourth gear → the second gear → the fifth gear → the first differential → the second gear → the third gear → the first differential → the transfer case assembly is output backwards, and the transfer case assembly comprises an output shaft of the front output shaft assembly and an output shaft of the rear output shaft assembly; under the working condition, the first differential lock is selected to be combined with or separated from the second differential lock according to requirements. At the moment, the speed ratio of the second gear → the fourth gear → the third gear → the fifth gear is smaller than 1, so the axle box is integrated into the speed-increasing transmission under the working condition, and the speed-increasing transmission is suitable for the working condition that the whole vehicle runs at high speed.

When the vehicle runs at a low gear, the first gear shifting mechanism moves leftwards to enable the input shaft to be fixedly connected with the first gear, the second gear shifting mechanism moves leftwards to enable the second shaft to be fixedly connected with the third gear, and the power flow of the axle box is that the input shaft → the first gear shifting mechanism → the first gear → the third gear → the fifth gear → the first differential → the transfer case assembly or the output shaft of the rear output assembly; under the working condition, if the differential phenomenon occurs between the front drive axle and the rear drive axle of the whole vehicle due to extreme working conditions, and the whole vehicle is difficult to get rid of the trouble, the differential lock is required to be moved to the right for locking, so that the differential mechanism is rigidly connected, and the whole vehicle gets rid of the trouble. In the low-gear running mode, the speed ratio of the transmission route of the first gear, the third gear and the fifth gear is greater than one, so that the axle box is in speed reduction transmission integrally under the working condition, and the low-gear running mode is suitable for the working condition that the whole vehicle runs at low speed.

A transfer case for a modular all-terrain crane comprises a transfer case basic module unit, wherein the transfer case basic module unit comprises an input shaft system assembly, a middle shaft system assembly and an output shaft system torque splitting device, the input shaft system assembly, the middle shaft system assembly and the output shaft system torque splitting device are distributed in parallel from top to bottom, a front output assembly is arranged at the left end of the output shaft system torque splitting device, a rear output assembly is arranged at the right end of the output shaft system torque splitting device, the right end of the middle shaft system assembly is provided with a first port 20, a second port 21 is arranged between the front output assembly and the output shaft system torque splitting device, a third port 22 and a fourth port 23 are arranged between the rear output assembly and the output shaft system torque splitting device, and the transfer case at least comprises a power takeoff module 2 and a torque splitting module 3, the power takeoff module 2, the torsion dividing module 3, the through main reducing module 4 and the off-bridge main reducing module 5 have the following six installation modes:

in the first mode, the torsion dividing module 3 is arranged between a third port 22 and a fourth port 23 and is used for increasing the torsion dividing ratio of the whole ground crane;

in the second mode, the through main reducing module 4 is inserted into the second port 21 and is used for shortening the length of the whole chassis of the all-terrain crane;

in the third mode, the bridge-off main reducing module 5 is inserted and installed at the second port 21 and used for increasing the whole driving force of the whole all-terrain crane when the whole all-terrain crane is in an uneven road surface or a climbing working condition, and the torsion dividing module 3 is installed between the third port 22 and the fourth port 23;

the power takeoff module 2 is inserted into the first port 20 and used for providing power for a rotary table, an arm support and a winch of the all-terrain crane;

the fifth mode is that the through main reducing module 4 is inserted and installed at the second port 21, and the power takeoff module 2 is inserted and installed at the first port 20;

the power takeoff module 2 is inserted and installed at the first port 20, and the torque splitting module 3 is installed between the third port 22 and the fourth port 23;

in a sixth mode, the power takeoff module 2 is inserted and installed at the first port 20, the torque splitting module 3 is installed between the third port 22 and the fourth port 23, and the bridge-off main reducing module 5 is inserted and installed at the second port 21.

Specifically, the embodiment adopts a 2:1 torque division module, and the 2:1 torque division module is a differential assembly with a planetary structure. The 2:1 torsion-dividing module consists of a front output shaft, a rear output shaft, a planet carrier, a planet wheel, a sun wheel and a gear ring. The front output shaft is fixedly connected with the sun gear, and the output torque of the sun gear is 1/3 of the total output torque of the torque splitting module; the rear output shaft is fixedly connected with a gear ring, the gear ring and the sun gear respectively output power to the output shaft of the front output shaft assembly and the output shaft of the rear output shaft assembly in a torque ratio of 2:1, the comprehensive output torque of the gear ring and the sun gear is 2/3 of the total output torque of the torque splitting module, and the planetary mechanism is input by a planet carrier. The planet wheel is fixedly connected with the fifth gear, the planet wheel is in interference fit with the planet carrier through a planet shaft, the planet wheel is positioned in the circumferential direction, and the tooth width direction of the planet wheel is axially limited in the planet carrier through a spacer.

As shown in the figure 3, an original transfer case basic module unit is a 1:1 transfer case assembly, a first differential mechanism and a 2:1 torque division module of the transfer case basic module unit are exchanged to form the transfer case assembly with a front-rear torque division ratio of 2:1, a fifth gear is fixedly connected with a planet carrier, and the structure is suitable for all-terrain crane models with double engines and three mechanical drive axles. At the moment, the transfer case is positioned between the first drive axle and the second drive axle, and the torque division ratio of the front output shaft to the rear output shaft is 1: 2.

The input shaft, the second shaft, the third shaft, the front output shaft, the rear output shaft, the through shaft II 59 and the through shaft 45 are transmission shafts, the cylinder control device, the bearing, the transfer case main shell, the spline, the end face flange, the input shaft, the gear I11, the gear II 12, the gear I16, the second shaft, the gear III 13, the gear IV 14, the gear II 17, the gear V15, the differential lock I18, the gear III 24, the power takeoff 25, the spline housing external spline, the gear VI 31, the gear VII 32, the gear VIII 34, the gear IX 34, the differential lock II 41, the differential lock II 42, the differential lock III 43, the differential lock III 44, the through shaft 45, the output half shaft I47, the output half shaft II 48, the gear XI 50, the gear XI 51, the gear twelfth 52, the gear thirteen 53, the differential lock IV 54, the differential lock V55, the differential lock V56, the output half shaft III 57, the output half shaft IV 58, the through shaft II 59, the through shaft II, the through shaft 45, The front output shaft, the rear output shaft, the spacer, the planet carrier, the planet wheel, the planet shaft, the sun gear and the gear ring can adopt a plurality of types in the prior art, and the skilled person can also select a proper type according to the actual requirement, and the embodiment is not illustrated.

Example two

Different from the first embodiment, in the present embodiment, the through main reducing module 4 is inserted into the second port 21, and is used for shortening the length of the whole chassis of the all-terrain crane; as shown in figure 4, the through main reducing module is inserted between the front output assembly and the first differential lock in the transfer case basic module unit, and a transmission shaft between the front output shaft assembly and the first differential lock of the transfer case is eliminated, so that an integrated structure of the through axle box is obtained. The through axle box integrated structure is mainly suitable for all-terrain crane models with double engines, short front-back distance of a chassis of the whole crane and four or six mechanical drive axles. The integrated structure of the through axle box has the main advantages that a transmission shaft between the front output assembly and the first differential lock is eliminated, the length of the whole vehicle chassis is shortened, more drive axles can be arranged on the whole vehicle chassis with shorter front and rear lengths, and the flexibility of the arrangement of the whole vehicle chassis is improved.

The through main reduction module comprises a main speed reducer assembly, an inter-wheel differential lock assembly, an inter-axle differential lock assembly, an inter-wheel differential assembly and an inter-axle differential assembly. The through shaft transmits a part of the power to the next drive axle, and the through shaft 45 transmits the rest of the power to the through axle through eight and nine pairs of gears, which are helical gears.

The main reducer assembly comprises a gear eight and a gear nine gear pair, power is from a gear 6 and a gear seven, and the gear eight is fixedly connected with the gear seven and used for changing the transmission direction of the whole torque; the inter-wheel differential lock assembly comprises a cylinder control device, a shifting fork, a guide shaft and a spline housing, wherein the spline housing is fixedly connected with a first output half shaft, an air source of the cylinder control device controls the disconnection or connection of an external spline of a third shell of the differential mechanism and the spline housing on a third differential lock, the external spline of the third shell of the differential mechanism and the spline housing on the third differential lock are in a normally open state, when a vehicle is in a muddy working condition, the external spline of the third shell of the differential mechanism and the spline housing on the third differential lock are connected by the air source of the cylinder control device to realize the rigid connection of the first output half shaft and a second output half shaft, and the first output half shaft 47 and the second output half shaft 48 are positioned on two sides of wheels of the all-terrain crane, so that the difficulty of escaping the vehicle is solved;

the inter-axle differential lock assembly comprises a second differential lock, a cylinder control device, a shifting fork, a guide shaft and a spline housing, wherein the spline housing is fixedly connected with an output shaft of the front output shaft assembly, an air source of the cylinder control device is used for connecting or disconnecting an external spline of the spline housing of the second differential lock with an internal spline of a second shell of the differential mechanism, the differential mechanism 44 is fixedly connected with a through shaft 45 through a cross shaft, the rigid connection between the output shaft of the front output shaft assembly and the axle is realized, the difficult problem of escaping is solved, and therefore the power is 1:1 is distributed to an output shaft 6 of the front output shaft assembly, and power is transmitted along a route from a gear six 31 to a gear seven 32 to a gear eight 33 to a gear nine 34 to an output half shaft one 47 and an output half shaft two 48.

The inter-wheel differential assembly is a differential III, the differential III comprises a half shaft gear, a planet wheel, a cross shaft and a differential shell, the half shaft gear is fixedly connected with a first output half shaft and a second output half shaft respectively, the shell of the whole differential III is fixedly connected with a gear nine, an air source of an air cylinder control device controls external splines of a spline housing of a differential lock III 43 to be engaged with internal splines of a shell of the differential III 44, the differential lock III 43 is arranged on the differential III 44 close to one side of the first output half shaft 47 and used for realizing rigid connection of the first output half shaft 47 and the second output half shaft 48, and the first output half shaft 47 and the second output half shaft 48 are positioned on two sides of wheels of the all-terrain crane;

differential mechanism assembly indicates differential mechanism two between the axle, and differential mechanism two includes half shaft gear, planet wheel, cross axle and differential mechanism casing, and the cross axle that passes through axle and differential mechanism two links firmly through the spline to with power 1:1 is assigned to the output shaft of the front output shaft assembly and to the bridge itself.

EXAMPLE III

Compared with a through main reduction module, the off-bridge main reduction module has no inter-axle differential assembly and the rest of structures are the same. The main reducing module of the off-bridge does not have power output at ordinary times, and the differential lock IV is arranged on the through shaft II 59. When the whole ground crane is in an uneven road surface or a climbing working condition, the driving force of the whole ground crane is insufficient due to small ground adhesive force of part of driving axles, at the moment, the differential lock IV 54 is hung, the power of the through shaft is transmitted to the main bridge-off reducing module through the inter-axle differential lock assembly, and the driving force of the whole ground crane is increased;

the off-bridge main reducing module 5 comprises a gear ten 50, a gear eleven 51, a gear twelve 52, a gear thirteen 53, a differential lock four 54, a differential lock five 55, a differential gear five 56, an output half shaft three 57, an output half shaft four 58 and a through shaft two 59,

the through shaft II 59 is fixedly connected with an output shaft 6 of the front output assembly, the gear III 50 is fixedly connected with the differential lock IV 54, the gear IV 50 is normally meshed with the gear IV 51, the gear IV 51 is coaxially fixedly connected with the gear IV 52, the gear IV 52 is normally meshed with the gear IV 53, the gear IV 52 and the gear IV 53 are both helical gears, the gear III 53 is fixedly connected with a shell of the differential mechanism V56, and the front output end and the rear output end of the differential mechanism V56 are respectively connected with an output half shaft IV 58 and an output half shaft III 57;

when the whole all-terrain crane is in an uneven road surface or a climbing working condition, the gear ten 50 is fixedly connected with the through shaft two 59 through the differential lock four 54, and the spline sleeve external spline of the differential lock five 55 is engaged with the spline in the differential mechanism five 56 shell, so that the rigid connection of the output half shaft three 57 and the output half shaft four 58 is realized.

As shown in fig. 5, different from the first embodiment, in the present embodiment, the off-bridge main reducing module 5 is inserted and installed at the second port 21, and is used for increasing the driving force of the whole all-terrain crane when the whole all-terrain crane is in an uneven road or climbing condition, and the torsion dividing module 3 is installed between the third port 22 and the fourth port 23;

and (3) directly and fixedly connecting the transfer case basic module unit with the off-axle main reduction module, directly replacing the first differential with the torsion division module 3, and canceling a transmission shaft between an output shaft of the front output shaft assembly and the first differential lock to obtain an off-axle case integrated structure. The integrated structure of the bridge-off box is mainly suitable for all-terrain crane models with double engines, short front-rear distance of the chassis of the whole crane and three mechanical drive axles. This motorcycle type is three transaxles drives at ordinary times, and when whole car was in abominable operating mode and causes whole car drive power not enough, will take off the epaxial inter-axle differential lock locking of link up of axle main reducer, this motorcycle type becomes four bridge drive cars, increases the drive power of whole car and makes whole car get rid of poverty smoothly. The main advantages of the integrated structure of the bridge-off box are similar to those of the integrated structure of the through box, and the main advantages are that the length of the whole vehicle chassis is shortened, and the flexibility of the arrangement of the whole vehicle chassis is increased.

Example four

Different from the first embodiment, in the first embodiment, the power takeoff module 2 is inserted and installed at the first port 20 and is used for providing power for a rotary table, an arm support and a winch of the all-terrain crane; the power takeoff module comprises a third gear shifting mechanism and a power takeoff, the power takeoff comprises a power takeoff shell, a power takeoff half shaft and a gear shifting fork, the third gear shifting mechanism and the power takeoff are in a normally separated state, the third gear shifting mechanism and the second gear shifting mechanism are disconnected through a spline sleeve of the second gear shifting mechanism in the sliding transfer case basic module unit, as shown in fig. 6, the combination of end face teeth of the third gear shifting mechanism and the second shaft achieves power combination, and therefore the whole vehicle hoisting operation is achieved through power transmission.

EXAMPLE five

Unlike the first embodiment, the through main reducer module 4 is inserted and mounted at the second port 21, and the power take-off module 2 is inserted and mounted at the first port 20.

EXAMPLE six

Different from the first embodiment, the power takeoff module 2 is inserted and installed at the first port 20, and the torque splitting module 3 is installed between the third port 22 and the fourth port 23;

as shown in fig. 6, 7, 8 and 9, in the above embodiments, the power takeoff module may be added to the transfer case product respectively carrying the torsion splitting module 3, the through main reducing module 4 and the off-bridge main reducing module 5, so as to form a series of transfer case products with the power takeoff function, the series of transfer case products are mainly suitable for all-terrain crane products equipped with a single engine, and the power takeoff module provides power for mechanisms such as a rotary table, an arm support and a winch of the crane during the hoisting operation of the crane. When getting on bus and getting power, the gear and the power trend of each transfer case product are the same, and the concrete description is: and the first gear shifting mechanism moves rightwards to enable the input shaft to be fixedly connected with the second gear, the second gear shifting mechanism moves rightwards to enable the second shaft to be separated from the third gear, and the third gear and the second shaft can rotate freely relatively. And the third gear shifting mechanism moves leftwards to enable the power takeoff to be fixedly connected with the second shaft, and at the moment, the power flow of the bridge box is the input shaft, the first gear shifting mechanism, the second gear, the fourth gear, the second shaft, the third gear shifting mechanism and the power takeoff, so that the hoisting operation is completed.

EXAMPLE seven

Different from the first embodiment, in the present embodiment, the power takeoff module 2 is inserted and installed at the first port 20, the torque splitting module 3 is installed between the third port 22 and the fourth port 23, and the bridge-off main reducing module 5 is inserted and installed at the second port 21.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.