Working condition self-adaptive transmission system of loader
Technical Field
The invention relates to the field of loaders, in particular to a working condition self-adaptive transmission system of a loader.
Background
The loader is an engineering auxiliary machine widely applied to construction and construction, and has functions of bulldozing, hoisting, loading and unloading and the like.
Many systems of the loader need power to operate, such as a wheel system, a brake system, a hydraulic system, an oil circulation system and the like, which all obtain power from an output shaft of a diesel engine through a transmission system, the power system in the original loader is rigidly connected with a load, and particularly how much power is transmitted to the load, the power system is arranged according to a complex electromechanical combination system of the original power system, the system usually occupies redundant power, and the input power of other systems is insufficient, so that the self-adaptive power proportioning cannot be achieved.
Disclosure of Invention
The invention aims to provide a working condition self-adaptive transmission system of a loader, which is used for solving the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
a working condition self-adaptive transmission system of a loader comprises a basic unit and a variable force hydraulic coupler, wherein the basic unit is connected with an input shaft, the basic unit distributes power of the input shaft to a plurality of load shafts through a plurality of gear sets, the power distribution proportion is linearly related to the power demand proportion of the load shafts, and the basic unit is connected with the load shafts through the variable force hydraulic coupler.
The original loader has a power system rigidly connected with the load, specifically, how much power is transmitted to the load, and the power system is set according to the complex electromechanical combination system of the original power system, and after the invention is used, the power can be adaptively distributed to a plurality of loads respectively through the pure mechanical transmission system of the basic unit, and the loader has a plurality of systems which need the power: the basic unit is connected with the load shaft through a variable force hydraulic coupler, the hydraulic coupler is a component for transmitting the power on the shaft and has an overload prevention function, when the load demand is large and the transmission system can not provide so much power, the hydraulic coupler transmits the power with the maximum power which can be transmitted by the hydraulic coupler, the value of the maximum power is related to the specification of the hydraulic coupler, and the transmission of the hydraulic coupler can prevent the shaft parts from being directly rigidly transmitted to cause damage. The variable force hydraulic coupler is a hydraulic coupler with the maximum value of transmitted power variable, the coupler in the prior art realizes the change of the power extreme value through different coupler specifications, and the variable force hydraulic coupler changes the power transmission threshold value through changing the transmission flow of the hydraulic coupler.
Further, the basic unit comprises a first output shaft, a second output shaft, a third output shaft, a first force distribution gear set and a second force distribution gear set,
the input shaft comprises a first gear arranged at the end part of the shaft body, the first output shaft comprises a second gear arranged at the end part of the shaft body, the second output shaft comprises a third gear arranged at the end part of the shaft body, the third output shaft comprises a fourth gear arranged at the end part of the shaft body, the first force distribution gear set comprises a first force distribution wheel and a first force distribution wheel, the second force distribution gear set comprises a second force distribution wheel and a second force distribution wheel, and the first gear, the second gear, the third gear, the fourth gear, the first force distribution wheel and the second force distribution wheel are bevel gears;
the axial lines of the input shaft and the first output shaft are overlapped, the first gear and the second gear are arranged in a face-to-face mode and are meshed with the first distribution wheel at the same time, the rotation axis of the first distribution wheel is perpendicular to the axial line of the input shaft, the first distribution wheel is installed on the input shaft or the first output shaft through a bearing, the hub part of the first distribution wheel is bent for a plurality of times to form the rotation axis of the first distribution wheel, and the hub part of the first distribution wheel is connected with the first distribution wheel through the bearing;
the axes of the second output shaft and the third output shaft are overlapped, the third gear and the fourth gear are arranged face to face and are simultaneously meshed and connected with the second distribution wheel, the axis of the second distribution wheel is vertical to the axis of the second output shaft, the second distribution wheel is arranged on the second output shaft or the third output shaft through a bearing, the hub part of the second distribution wheel is bent for a plurality of times to form a rotating shaft of the second distribution wheel, and the hub part of the second distribution wheel is connected with the second distribution wheel through the bearing;
the first force distribution wheel is meshed with the second force distribution wheel.
The transmission system can be provided with a plurality of basic units, the power of one input shaft is transmitted to load shafts of a plurality of systems by being connected in series and in parallel, the combined use of the two basic units can transmit the power of one input shaft to a second output shaft, a third output shaft, a fourth output shaft, a fifth output shaft and a sixth output shaft, and more loads can build the transmission system by using the basic units in a superposition mode for multiple times. In the basic unit, the transmission system continuously operates under a certain condition, when the rotation resistance on the first output shaft is increased, in a planetary transmission system consisting of the first gear, the second gear and the first distribution wheel, the rotation speed of the second gear is reduced, the revolution of the first distribution wheel around the input shaft is accelerated while the first distribution wheel rotates, the revolution of the first distribution wheel is the rotation of the first distribution wheel, the rotation of the first distribution wheel is the rotation driving of the second distribution wheel, the rotation of the second distribution wheel is the revolution of the second distribution wheel around the second output shaft, when the second distribution wheel revolves, the third gear and the fourth gear on two sides are driven to rotate, in a planetary transmission system consisting of the second distribution wheel, the third gear and the fourth gear have different rotation speeds according to the rotation resistance ratio when the third gear and the fourth gear have different rotation resistances, therefore, the output power to the second output shaft is different from that of the third output shaft, and the purpose of self-adjustment is achieved.
Furthermore, the variable force hydraulic coupler comprises a shell, a hydraulic coupling wheel, a first shielding plate, a second shielding plate and an adjusting piece, wherein the two shells are fixed through a fastening piece after clamping the first shielding plate, the shell is provided with two hydraulic coupling wheels, the two hydraulic coupling wheels are separated through the first shielding plate, one hydraulic coupling wheel is fixedly connected with an external load shaft, the other hydraulic coupling wheel is fixedly connected with one output shaft of the basic unit, the second shielding plate is arranged on one side of the first shielding plate and can be driven by the adjusting piece to rotate around the axis of the load shaft, the first shielding plate is provided with a plurality of first shielding holes, the second shielding plate is provided with a plurality of second shielding holes, and the overlapping area of the second shielding holes and the first shielding holes can be changed through the rotation of the second shielding plates. The hydraulic coupler can play a role of connecting shaft transmission in a certain power range, one output shaft at one side drives one hydraulic coupling wheel to rotate, the hydraulic coupling wheel drives working fluid in the hydraulic coupler, the working fluid drives the other hydraulic coupling wheel to rotate so as to drive a load shaft to rotate, the transmitted power is transmitted by the borne power after exceeding the range, and the hydraulic coupler has the characteristic of large-torque starting and automatically performs adaptive transmission on torque and rotating speed. The power drawn from the output shaft of the base unit is regulated.
Furthermore, the second shielding plate is installed in the casing through a pin shaft, and after the pin shaft penetrates through the first shielding plate, two ends of the pin shaft are installed in the center of the end face of the liquid coupling wheel through a bearing or a shaft sleeve. The pin shaft is used as a rotating shaft of the second baffle plate, so that the rotating axis of the second baffle plate can be ensured to be a basic unit output shaft, and the second baffle plate can also be positioned through a cylindrical surface on an excircle.
Preferably, the adjusting piece is a worm, and the outer edge of the second shielding plate is provided with teeth which are meshed with the adjusting piece in a worm wheel and worm mode. The adjusting piece and the second shielding plate are in worm-gear transmission, a self-locking effect can be achieved, the angle phase of the second shielding plate can be controlled only through the adjusting piece from the outside, and the second shielding plate cannot generate angle phase change due to flowing of working liquid of the hydraulic coupler in the operation process.
Preferably, when the basic units are used in combination, the first output shaft is used as the input of the other basic unit.
Compared with the prior art, the invention has the beneficial effects that: the transmission system can transmit the rotation energy of the input shaft to a plurality of load shafts, one input can be converted into three outputs through a basic unit of the transmission system, a planet wheel transmission system consisting of a first gear, a second gear and a first force distribution wheel, and a planet wheel system consisting of a second force distribution wheel, a third gear and a fourth gear can automatically adjust the rotation speed of an output shaft according to the rotation resistance on three output shafts, so that the self-adaptive working condition adjustment is achieved; the input shaft can be expanded into more outputs by the series-parallel connection of the basic units; the variable force hydraulic coupler can adjust the working fluid passing area of the hydraulic coupler through the adjusting piece, so that the power transmission threshold value of the hydraulic coupler is changed, the change of the channel area also changes the rotation resistance of an output shaft of a basic unit connected with the variable force hydraulic coupler, and the variable force hydraulic coupler has manual intervention capability while adaptively adjusting the rotation output ratio.
Drawings
In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
FIG. 1 is a schematic structural diagram of a basic unit of the present invention;
FIG. 2 is a schematic view of the connection of the variable force fluid coupling of the present invention;
FIG. 3 is a schematic structural view of a variable force fluid coupling according to the present invention;
FIG. 4 is a schematic view of the operation of the first and second shutters of the present invention;
FIG. 5 is a schematic view of the connection of the basic unit combination of the present invention;
fig. 6 is a schematic view of the connection of the present invention in a loader.
In the figure: 1-an input shaft, 11-a first gear, 2-a first output shaft, 21-a second gear, 3-a second output shaft, 31-a third gear, 4-a third output shaft, 41-a fourth gear, 5-a first distribution gear set, 51-a first distribution gear, 52-a first distribution gear, 6-a second distribution gear set, 61-a second distribution gear, 62-a second distribution gear, 7-variable force hydraulic coupler, 71-shell, 72-fluid coupling wheel, 73-first baffle plate, 731-first baffle hole, 74-second baffle plate, 741-second baffle hole, 75-adjusting piece, 76-pin shaft, 79-fastening piece, 91-fourth output shaft, 92-fifth output shaft, 93-sixth output shaft and 100-basic unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 and fig. 6, the adaptive operating condition transmission system comprises a base unit 100 and a variable force hydraulic coupler 7, wherein the base unit 100 is connected with an input shaft 1, the base unit 100 distributes the power of the input shaft 1 to a plurality of load shafts through a plurality of gear sets, the power distribution ratio is linearly related to the power demand ratio of the load shafts, and the base unit 100 is connected with the load shafts through the variable force hydraulic coupler 7.
While the original loader has its power system rigidly connected to the load, specifically how much power is delivered to the load, is configured according to the complex electromechanical combination system of the original power system, after using the present invention, the power can be adaptively distributed to a plurality of loads through the purely mechanical transmission system of the base unit 100, for example, in fig. 6, the loader has a plurality of systems that need power: the basic unit 100 is connected with the load shaft through a variable force hydraulic coupler 7, the hydraulic coupler is a component for on-shaft power transmission and has an overload prevention function, when the load demand is large and the transmission system cannot provide so much power, the hydraulic coupler can transmit the maximum power which can be transmitted by the hydraulic coupler, the value of the maximum power is related to the specification of the hydraulic coupler, and the transmission of the hydraulic coupler can prevent the shaft parts from being directly rigidly transmitted to cause damage. The variable force hydraulic coupler 7 is a hydraulic coupler with the maximum value of transmitted power variable, the prior art coupler realizes the change of the power extreme value through different coupler specifications, and the variable force hydraulic coupler 7 of the invention changes the power transmission threshold value through changing the transmission flow of the hydraulic coupler.
As shown in fig. 1, the base unit 100 includes a first output shaft 2, a second output shaft 3, a third output shaft 4, a first power distribution gear set 5 and a second power distribution gear set 6,
the input shaft 1 comprises a first gear 11 arranged at the end part of the shaft body, the first output shaft 2 comprises a second gear 21 arranged at the end part of the shaft body, the second output shaft 3 comprises a third gear 31 arranged at the end part of the shaft body, the third output shaft 4 comprises a fourth gear 41 arranged at the end part of the shaft body, the first force distribution gear set 5 comprises a first force distribution wheel 51 and a first force distribution wheel 52, the second force distribution gear set 6 comprises a second force distribution wheel 61 and a second force distribution wheel 62, and the first gear 11, the second gear 21, the third gear 31, the fourth gear 41, the first force distribution wheel 51 and the second force distribution wheel 61 are bevel gears;
the axes of the input shaft 1 and the first output shaft 2 are overlapped, the first gear 11 and the second gear 21 are arranged face to face and are meshed with the first distribution wheel 51 at the same time, the rotation axis of the first distribution wheel 51 is vertical to the axis of the input shaft 1, the first distribution wheel 52 is arranged on the input shaft 1 or the first output shaft 2 through a bearing, the hub part of the first distribution wheel 52 is bent for a plurality of times to become the rotation axis of the first distribution wheel 51, and the hub part of the first distribution wheel 52 is connected with the first distribution wheel 51 through a bearing;
the axes of the second output shaft 3 and the third output shaft 4 are overlapped, the third gear 31 and the fourth gear 41 are arranged face to face and are simultaneously meshed with the second distribution wheel 61, the axis of the second distribution wheel 61 is vertical to the axis of the second output shaft 3, the second distribution wheel 62 is arranged on the second output shaft 3 or the third output shaft 4 through a bearing, the hub part of the second distribution wheel 62 is bent for a plurality of times to become a rotating shaft of the second distribution wheel 61, and the hub part of the second distribution wheel 62 is connected with the second distribution wheel 61 through a bearing;
the first force-dividing wheel 52 is in meshing connection with the second force-dividing wheel 62.
Fig. 1 shows the transmission principle of the base unit 100, the transmission system may be provided with a plurality of base units 100, as shown in fig. 6, the power of one input shaft 1 is transmitted to the load shafts of a plurality of systems by being connected in series and in parallel, fig. 5 shows a schematic diagram of the combined use of two base units 100, the combined use of two base units 100 can transmit one input shaft 1 to the second output shaft 3, the third output shaft 4, the fourth output shaft 91, the fifth output shaft 92 and the sixth output shaft 93, and more loads can be transmitted to the transmission system by using the base units 100 in a plurality of times in a superposition manner. In the basic unit 100, the transmission system is continuously operated under a certain condition, when the rotational resistance on the first output shaft 2 increases, in the planetary transmission system composed of the first gear 11, the second gear 21 and the first distribution wheel 51, the rotational speed of the second gear 21 decreases, the revolution of the first distribution wheel 51 around the input shaft 1 is increased while the first distribution wheel 51 rotates on its axis, the revolution of the first distribution wheel 51 is also the rotation of the first distribution wheel 52, the rotation of the first distribution wheel 52 is the rotational driving of the second distribution wheel 62, the rotation of the second distribution wheel 62 is also the revolution of the second distribution wheel 61 around the second output shaft 3, and when the second distribution wheel 61 rotates, the third gear 31 and the fourth gear 41 on both sides are driven to rotate, in the planetary transmission system composed of the second distribution wheel 61, the third gear 31 and the fourth gear 41, when the rotational resistances of the third gear 31 and the fourth gear 41 are different, the rotational speeds of the third gear 31 and the fourth gear 41 are different according to the rotational resistance ratio, the output power to the second output shaft 3 and the third output shaft 4 is thus different for self-regulation purposes, the output power being the rotation speed multiplied by the torque, it being noted that in the present invention the output power is increased mainly by the increase of the rotation speed, while the variation of the torque differs from conventional knowledge.
As shown in fig. 3, the variable force fluid coupling 7 includes a housing 71, a fluid coupling wheel 72, a first shielding plate 73, a second shielding plate 74 and an adjusting member 75, the two housing 71 clamps the first shielding plate 73 and then fixes the first shielding plate 73 by a fastening member 79, the housing 71 is provided with the two-piece fluid coupling wheel 72, the two-piece fluid coupling wheel 72 is separated by the first shielding plate 73, the fluid coupling wheel 72 on one side is fixedly connected with an external load shaft, the fluid coupling wheel 72 on the other side is fixedly connected with one of the output shafts of the base unit 100, the second shielding plate 74 is arranged on one side of the first shielding plate 73 and can be driven by the adjusting member 75 to rotate around the axis of the load shaft, the first shielding plate 73 is provided with a plurality of first shielding holes 731 on the plate surface, the second shielding plate 74 is provided with a plurality of second shielding holes 741 on the plate surface, and the rotation of the second shielding plate 74 can change the overlapping area of the second shielding holes 741 and the first shielding holes 731. The hydraulic coupler can play a role of connecting shaft transmission in a certain power range, one output shaft drives one fluid coupling wheel 72 to rotate, the fluid coupling wheel 72 drives working fluid in the hydraulic coupler, the working fluid drives the other fluid coupling wheel 72 to rotate so as to drive a load shaft to rotate, the transmitted power is transmitted by the borne power after exceeding the range, and the hydraulic coupler has the characteristic of large torque starting and automatically carries out adaptive transmission on torque and rotating speed, the invention improves the conventional hydraulic coupler, adds a first baffle plate 73 and a second baffle plate 74 which can change the area of a channel between the fluid coupling wheels 72 of the original hydraulic coupler, thereby adjusting the working fluid passing area of the hydraulic coupler from the outside through an adjusting piece 75, changing the number of working blades of the fluid coupling wheel 72 and adjusting the power, the power loss of the fluid coupling can be slightly changed to adjust the power taken from the output shaft of the base unit 100.
As shown in fig. 3, the second shielding plate 74 is installed in the housing 71 through a pin 76, and after the pin 76 passes through the first shielding plate 73, both ends are installed at the center of the end surface of the liquid coupling wheel 72 through bearings or bushings. The pin 76 serves as a rotation shaft of the second shielding plate 74, so that the rotation axis of the second shielding plate 74 is the output shaft of the base unit 100, and can also be positioned by a cylindrical surface on the outer circle.
As shown in fig. 4, the adjusting member 75 is a worm, and the second shielding plate 74 has teeth on its outer periphery to engage with the adjusting member 75 in the form of a worm gear. The adjusting piece 75 and the second shielding plate 74 are in worm-and-gear transmission, so that a self-locking effect can be achieved, the angle phase of the second shielding plate 74 can be controlled only through the adjusting piece 75 from the outside, and the angle phase change of the second shielding plate 74 cannot be generated due to the flowing of working fluid of the hydraulic coupler in the operation process.
As shown in fig. 5, when the base units 100 are used in combination, the first output shaft 2 serves as an input of another base unit 100.
The use principle of the device is as follows: as shown in fig. 6 and fig. 1, the diesel engine is used as an engine of the loader, an output shaft of the diesel engine is used as an input shaft 1 of a transmission system, the transmission system distributes the rotation of the input shaft 1 to a plurality of systems needing power, and the systems are connected through a variable force fluid coupling 7 to prevent large torque from being incapable of starting; when a certain system (for example, a system connected with the output shaft 3) does not need too much power, the variable force hydraulic coupler 7 connected with the system increases the working fluid passage area, under the condition that the load is unchanged, the resistance of the output shaft 3 connected with the variable force hydraulic coupler 7 is increased, the rotating speed is reduced, the total power consumption is reduced due to the reduction of the flow loss of the variable force hydraulic coupler 7, the power obtained from the basic unit 100 is reduced, and the rest power of the input shaft 1 is more transmitted to other output shafts; when a certain system (for example, a system to which the output shaft 3 is connected) needs more power, the variable force hydraulic coupler 7 reduces the working fluid passage area, and the working fluid pumped by the fluid coupling wheel 72 is reduced, and the rotation resistance of the output shaft 3 connected thereto is reduced, so that the rotation speed of the output shaft 3 is increased, and more power is obtained from the base unit 100 and is transmitted to the load side. .
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.