KR101901427B1 - Hydro Mechanical Transmission - Google Patents

Abstract

The present invention relates to a mechanical hydraulic transmission in which a mechanical transmission and a hydraulic transmission are combined together. Specifically, the present invention relates to a structure of a transmission having high power transmission efficiency, which is a transmission used for transmission apparatuses for heavy duty vehicles such as tractors. According to one embodiment of the present invention, the mechanical hydraulic transmission comprises: a drive shaft (110) receiving power from an engine; a hydro static unit (HSU) module (600) receiving a part of power from the drive shaft (110) and changing the output speed; a front end planetary gear part (200) for receiving power from the drive shaft (110) and power from the HSU module; a front end clutch part (300) connected to a front end planetary gear part (210) for interrupting or connecting the power flow according to a set speed mode; a rear end planetary gear part (400) connected to the front end clutch part (300); a rear end clutch part (500) connected to the rear end planetary gear part (400) to cut off or connect the power flow according to a set speed mode; and an output shaft (130) for outputting the power shifted by the interlocking of front end clutch part (300) and the rear end clutch part (500).

Description

[0002] Hydro Mechanical Transmission [0003]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanical hydraulic transmission in which a mechanical transmission and a hydraulic transmission are combined together, and particularly to a transmission used for a transmission of a heavy duty work vehicle such as a tractor.

Generally, a transmission is provided between an engine shaft that is rotated by receiving torque from an engine of a vehicle and an axle that drives a drive wheel that moves the vehicle. The transmission is provided with a stop, low speed travel, high speed travel, , And parking, it is a device that adjusts the torque and speed required when the vehicle is driven.

The transmission of the vehicle is provided with a plurality of gears having different gear teeth to implement a multi-step shifting step, for example, a shifting step from the first step to the fifth step, So that the vehicle can be operated. Various types of transmission devices have been developed and used in order to realize this. A manual transmission in which a gear is directly operated by a vehicle driver, an automatic transmission in which a gear is automatically operated in accordance with the vehicle speed, a pulley or a chain, And a continuously variable transmission.

Particularly, the continuously variable transmission (CVT) does not perform each step-variable shifting as in the first to fifth steps but allows a continuous change in speed by simply operating the accelerator within a certain range, It is advantageous that the fuel consumption rate is good because only the desired power is used in the operation of the machine. Compared to general mechanical transmission and automatic transmission, there is also an advantage in that the production cost can be reduced by reducing the number of parts.

However, the most serious disadvantage of the continuously variable transmission for automobiles developed until now is that the frictional force is insufficient, so that it is easy to apply the continuously variable transmission to a compact car which takes a low load, but it is difficult to apply a continuously variable transmission to a vehicle which is under heavy load.

Especially, the tractor which is mainly used for working agricultural machinery or civil engineering construction is equipped with a variety of working means (plow, harrow, etc.) according to various working conditions and ground conditions, Is insufficient to be used as effective transmission means for a tractor.

Open Patent Publication No. 10-2000-0000112 (January 15, 2000)

It is an object of the present invention, which is devised to solve the problems of the prior art, to increase the convenience and efficiency in operation of a work machine by adopting the HSU module, which is a continuously variable transmission, We also want to provide a mechanical hydraulic transmission suitable for machines.

According to an embodiment of the present invention, a drive shaft (110) that receives power from an engine (110); An HSU (Hydro Static Unit) module 600 that receives a part of the power from the drive shaft 110 and changes the output speed; A front end planetary gear unit 200 for receiving power from the drive shaft 110 and power from the HSU module; A front end clutch unit 300 connected to the front end planetary gear unit 200 to cut off or connect a power flow according to a set speed mode; A rear end planetary gear unit 400 connected to the front end clutch unit 300; A rear end clutch unit 500 connected to the rear stage planetary gear unit 400 to shut off or connect the power flow according to a set speed mode; And an output shaft (130) for outputting power shifted by interlocking the front end clutch portion (300) and the rear end clutch portion (500)
The shear planetary gear unit 200 includes a first sun gear 201, a first planetary gear 202, a first planetary gear carrier 203, a first ring gear 204, a second sun gear 205, A gear 206, a second planetary gear carrier 207, and a second ring gear 208,
The front end clutch portion 300 includes a first clutch 301 that interrupts or connects power transmission through the second ring gear 208 and a second clutch 301 that interrupts or connects power transmission through the second sun gear 205. [ And at least two clutches including a clutch 302,
The rear stage planetary gear unit 400 includes a third sun gear 401, a third planetary gear 402, a third planetary gear carrier 403, and a third ring gear 404,
And the third planetary gear carrier (403) is connected to the second clutch (302) and the rear clutch part (500), respectively.

Here, the output shaft 130 may be disposed in parallel to the axial direction of the driving shaft 110.

In addition, the HSU module 600 may be disposed in parallel to the axial direction of the drive shaft 110.

The HSU module 600 includes a series of gear trains constituted by a plurality of HSU input gears 601, 602 and 603 located downstream of the driving shaft 110 and a plurality of HSUs May be characterized by being located between a series of gear trains constituted by the output gears (604, 605, 606).

The power transmission from the drive shaft 110 to the output shaft 120 is transmitted to the front stage planetary gear unit 200, the front stage clutch unit 300, the rear stage planetary gear unit 400, the rear stage clutch unit 500). ≪ / RTI >

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The third ring gear 404 is fixed to the transmission case, and the second clutch 302 is engaged with the third planetary gear 402.

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In addition, the rear end clutch portion 500 may include a forward clutch 501 and a reverse clutch 502.

According to an embodiment of the present invention, the HSU module, which is a continuously variable transmission, is employed to increase convenience and efficiency in operation of a work machine, and to achieve high power transmission efficiency of a transmission by incorporating mechanical transmission means together .

In addition, a power branching type hydraulic hydraulic transmission is provided, and a combination of a series of gear trains and a clutch is configured to be compact, thereby ensuring high space efficiency in mounting a working machine such as a tractor.

1 is a view showing a configuration and operation flow for a mechanical hydraulic transmission according to an embodiment of the present invention.
2 is an exploded perspective view of a hydrodynamic transmission according to one embodiment of the present invention.
3 is a chart illustrating a shift mode of a mechanical hydraulic transmission according to an embodiment of the present invention.
4 is a graph of the displacement volume of the HSU pump according to one embodiment of the present invention.
5 is a graph of the output speed according to the exclusion volume of FIG.

The embodiments described below are provided so that those skilled in the art can easily understand the technical idea of the present invention, and thus the present invention is not limited thereto. In addition, the matters described in the attached drawings may be different from those actually implemented as schematized drawings to easily describe embodiments of the present invention.

It is to be understood that when an element is referred to as being connected or connected to another element, it may be directly connected or connected to the other element, but it should be understood that there may be other elements in between.

The term "connection" as used herein means a direct connection or indirect connection between a member and another member, and may refer to any physical connection or electrical connection such as adhesion, attachment, fastening, bonding, and bonding.

Also, the expressions such as 'first, second, third' and the like are used only for distinguishing plural configurations, and do not limit the order or other features among the configurations.

The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. The word "comprise" or "having" is used herein to mean that a feature, a number, a step, an operation, an element, a component or a combination thereof is disclosed in the specification, A step, an operation, an element, a component, or a combination thereof.

&Quot; Upstream "means a side from which power is input from one member," Downstream " means a side from which power input from one member is transmitted, and " Can be referred to as " one point "

The mechanical hydraulic transmission according to an embodiment of the present invention includes a front stage planetary gear unit 200, a front stage clutch unit 300, a rear stage planetary gear unit 400, and a rear stage clutch unit 500 ) Is located.

In addition, the mechanical hydraulic transmission according to an embodiment of the present invention may include a planetary gear train, which is a mechanical transmission device, and a hydrostatic unit (HST), which is a hydraulic type transmission device, . According to one embodiment, three or more power transmission paths may be formed depending on the embodiment, for various modifications of the additional transmission or transmission packaging.

BACKGROUND ART [0002] As described above, an agricultural machine such as a tractor requires a variety of working means in various working conditions and ground conditions, and therefore, a continuously variable transmission that is easy to operate and convenient is required. However, the continuously variable transmission system composed of HSU only has low power transmission efficiency and is used mainly for light duty farming machines such as lawn mowers and is unsuitable for heavy duty farming machinery.

Accordingly, the present invention intends to provide a hydro mechanical drive transmission (HMT) that combines the advantages of operation convenience of the HSU and high power transmission efficiency of a mechanical transmission. That is, it provides a shift system that combines the hydrostatic transmission of the HSU module with the mechanical transmission of the gear train. Here, the hydrostatic transmission of the HSU module can finely change the output speed for the comfort of the user and the operation comfort, and can change the running mode such as low speed, high speed, forward or backward through the mechanical shift of the gear train have.

Hereinafter, the construction of a mechanical hydraulic transmission according to an embodiment of the present invention will be described in detail with reference to FIG.

1 is a view showing a configuration and operation flow for a mechanical hydraulic transmission according to an embodiment of the present invention.

A mechanical hydraulic transmission according to an embodiment of the present invention includes a drive shaft 110 receiving power from an engine; An HSU (Hydro Static Unit) module that receives a part of the power from the drive shaft 110 and changes the output speed; A front end planetary gear unit 200 for receiving power from the drive shaft 110 and power from the HSU module; A front end clutch unit 300 connected to the front end planetary gear unit 210 to shut off or connect the power flow according to a set speed mode; A rear end planetary gear unit 400 connected to the front end clutch unit 300; A rear end clutch unit 500 connected to the rear stage planetary gear unit 400 to shut off or connect the power flow according to a set speed mode; And an output shaft 130 for outputting the power shifted by the interlocking of the front-end clutch unit 300 and the rear-end clutch unit 500.

First, the HSU module 600 of the present invention will be described in detail.

The HSU module 600 is disposed in parallel to the axial direction of the driving shaft 110. The HSU module 600 includes a series of gear trains constituted by a plurality of HSU input gears 601, 602 and 603 located downstream of the drive shaft 110 and a plurality of HSUs And is located between the series of gear trains constituting the output gears 604, 605, and 606. The HSU module 600 receives power from the engine through the HSU input gears 601, 602 and 603 and transmits the continuously-variable power to the planetary gear train through the HSU output gears 604, 605 and 606 . Here, 'upstream' means the direction in which the engine power is first input, and 'downstream' means the direction in which the engine power is output.

1, the HSU input gear is constituted by a first input gear 601, a second input gear 602, and a third input gear 603, but is not limited thereto and in some cases, the gear ratio Or a smaller number of input gears depending on the mission case 100 design volume, or may additionally include an input gear. For example, the second input gear 602 may be omitted. This applies equally to HSU output gears.

The HSU module 600 according to an embodiment of the present invention includes a hydraulic pump P and a hydraulic motor M and an HSU input shaft (not shown) for transmitting power from the HSU third input gear 604 toward the hydraulic pump P And an HSU output shaft 610 'for transmitting power from the hydraulic motor M to the HSU first output gear 604.

The configuration of the HSU input shaft 610 and the HSU output shaft 610 'can be varied in size and shape according to the mounting mechanism and the load capability of the actual agricultural machine working vehicle, and supports the HSU input shaft 610 and the HSU output shaft 610' The overall shape of the transmission housing structure including the jig and the mission case can also be freely designed according to the loading mechanism and load capacity of the working vehicle.

In the HSU module according to an embodiment of the present invention, the hydraulic pump P may be a variable displacement hydraulic pump and the hydraulic motor M may be a fixed displacement hydraulic motor. The variable capacity method includes a swash plate type in which the pressure fluid flows through the control block provided between the hydraulic pump and the hydraulic motor and changes the volume of the hydraulic pump through the swash plate adjustment of the swash plate provided at one side of the hydraulic pump, A diaphragm type which changes the volume of the hydraulic pump by varying the slope of the hydraulic pump, or the like. In the present invention, the swash plate type is preferable because the HSU module is formed substantially parallel to the drive shaft, but the biaxial type is not impossible in some cases. The swash plate type or boss type method has an advantage that the internal structure is simple and there is no shift shock because the continuously variable transmission is performed due to the volume change of the hydraulic pump. The speed ratio control of the HSU module may be performed by an electronic control module provided on one side of the work vehicle. In particular, according to one embodiment, the slope of the swash plate or the slope of the bossable yoke may be actively controlled by monitoring the HSU control block in relation to the change in the volume of the hydraulic pump.

1, it is preferable that the hydraulic pump P and the hydraulic motor M are adopted as a series type HSU module which is located on the same axis but not in parallel with each other . The overall structure of the mechanical hydraulic transmission (HMT) of the present invention is advantageous in that the HMT can be compactly packaged by designing the planetary gear train as the mechanical transmission and the HSU module as the hydraulic transmission in parallel with each other.

The operation principle of the HSU module 600 of the present invention is such that a part of the power received from the engine is branched to the HSU module 600 and then the volume of the hydraulic pump is changed to change the rotational speed of the hydraulic motor, So that the same torque can be generated regardless of the rotational speed. The generated torque is transmitted to the shear planetary gear unit 200 located upstream of the drive shaft 110 in accordance with the power flow to the HSU output shaft 610 '-> the HSU output gear-> the first sun gear 201.

Next, with reference to Fig. 1 and Fig. 2 together, the configuration of the planetary gear train of the present invention and the operation principle between constituent elements will be described. For reference, the planetary gear train referred to in the present invention means a series of gear trains including the forward planetary gear unit 200, the rear planetary gear unit 400, and the like.

2 is an exploded perspective view of a hydrodynamic transmission according to one embodiment of the present invention.

The first power input (input) from the engine is branched in the direction of the input gear 111 and the HSU module, and the divided power is transmitted to the front stage planetary gear unit 200, The rear stage planetary gear unit 400, and the rear stage clutch unit 500, respectively. Thus, in the present invention, it is possible to provide a hybrid transmission having a continuously variable transmission, which is easy and convenient to operate, and a mechanical transmission for high power transmission efficiency.

Specifically, the shear planetary gear unit 200 of the present invention combines the power received from the HSU output gears with the power transmitted from the drive shaft 110. Then, the synthesized power is transmitted to the front end clutch unit 300 and then to the rear end planetary gear unit 400 and the rear end clutch unit 500 after the front end clutch unit 300.

First, the drive shaft 110 and the output shaft 130 of the present invention will be described in detail. The drive shaft 110 has a predetermined length and transmits a driving force input from the engine to the output shaft 130. The output shaft 130 may be divided into a driving force output shaft Wo and a power take-off output shaft PTO. The motive power output shaft Wo may be an output shaft for transmitting power for driving a work vehicle wheel and the power takeoff output shaft PTO may be an output shaft for drawing power required for driving a work crane such as a tractor . Since the tractor must operate not only forward and backward but also the working machine, the engine power is selectively received from the HMT configuration of the present invention, and the power take-off (PTO) is possible.

Also, in one embodiment of the present invention, the drive shaft 110 is configured to be able to rotate about an axis by receiving power from the engine, and may be fixed to other shift elements disposed on the drive shaft 110, It may be a supported structure. For example, the driving shaft 110 includes an HSU output gear 604, an input gear 111 and a front stage planetary gear unit 200, a front stage clutch unit 300, a rear stage planetary gear unit 400, a rear stage clutch unit 500, The input gear 111 and the HSU input gear 601 are fixedly supported and the front planetary gear unit 200, the front end clutch unit 300, the rear planetary gear unit 400, Rear-end clutch unit 500 and the like. Meanwhile, in the present invention, a taper roller bearing may be applied to firmly support the shaft in the rotational motion of the drive shaft 110, the HSU input shaft 610 ', or the HSU output shaft 610.

Providing power from the drive shaft 110 can be done through the input gear 111 shown in Fig. 1, the input gear 111 transmits part of the power provided from the engine to the first ring gear 204 and the second planetary gear carrier 207. [

According to an embodiment of the present invention, the forward planetary gear unit 200 located upstream of the drive shaft 110 includes a first sun gear 201, a first planetary gear 202, a first planetary gear carrier 203, A second planetary gear 206, a second planetary gear carrier 207, and a second ring gear 208. The second planetary gears 206,

The first planetary gear 202 and the second planetary gear 206 of the present invention refer to the gears revolving around the first sun gear 201 and the second sun gear 205 in the state where they are engaged with the outer circumference of the first sun gear 201 and the second sun gear 205, respectively. The first planetary gear carrier 203 and the second planetary gear carrier 207 are connected to the first planetary gear 202 in the state where the center of the shaft coincides with the first planetary gear 202 and the second planetary gear 206, And the second planetary gears 206, respectively. The first ring gear 204 and the second ring gear 208 rotate around the first planetary gear 202 and the second planetary gear 206.

Here, the first ring gear 204 and the second planetary gear carrier 207 can receive power directly from the drive shaft 110 through the input gear 111 described above.

More specifically, hydraulic power is supplied from the HSU module 600 via the first sun gear 201, mechanical power is supplied from the engine via the first ring gear 204, and then the first planetary gear 202 ), Hydraulic power and mechanical power are combined.

In addition, in the second planetary gear 206, a process of combining the power synthesized in the first planetary gear 202 and the mechanical power supplied from the engine may occur.

As a result, the combined power output through the first planetary gear 202 and the second planetary gear 206 is all influenced by the HSU module, and the output speed can be changed continuously such as the graph shown in FIG. 5 do.

The front end clutch unit 300 is provided at the middle of the drive shaft 110. The front end clutch unit 300 is provided with a plurality of clutches 300 that are not a single clutch for interrupting or connecting the power flow transmitted from the front end planetary gear unit 200, ≪ / RTI > For example, the first clutch 301 and the second clutch 302 may be configured as shown in FIG. Needless to say, the third clutch, the fourth clutch, ..., the n-th drive clutch (n: natural number) may be additionally provided in some cases in order to implement more various shifting mechanisms to be.

1, in the case where the front-end clutch 300 of the present invention is composed of two clutches 301 and 302, the first clutch 301 is connected to the first planetary gear carrier 203 and the second And the second clutch 302 may be configured to restrain the motion of the ring gear 208 and the second clutch 302 may be configured to restrain the second sun gear 205. [

The first clutch 301 and the second clutch 302 are driven in such a manner that one of them is applied and the other is disengaged. The second clutch 302 is released when the first clutch 301 is applied and the second clutch 302 is applied when the first clutch 301 is released.

Therefore, when the first clutch 301 is applied, only the combined power of the first planetary gear 203 is output, and when the second clutch 302 is applied, only the combined power of the second planetary gear 203 is output do.

The rear stage planetary gear unit 400 located at the middle of the drive shaft 110 includes a third sun gear 401, a third planetary gear 402, a third planetary gear carrier 403, and a third ring gear 404 . Here, the third planetary gear 402 is configured to revolve around the third sun gear 401 while sharing a central axis with the third planetary gear carrier 403. Further, the third sun gear 401 is configured to be connected to the first clutch 301, and the third planetary gear carrier 403 is configured to be coupled to the second clutch 302. [ The third ring gear 404 is formed to be fixed to the mission case 100.

1, the rear end planetary gear unit 400 is positioned behind the power flow front end clutch unit 300, but the rear end planetary gear unit 400 must be located at the rear of the front end clutch unit 300 in the physical arrangement, As shown in FIG. As shown in FIG. 2, the rear end planetary gear unit 400 may be disposed substantially directly adjacent to the front end planetary gear unit 200.

The rear stage planetary gear unit 400 described above is provided for the purpose of increasing the torque by exercising the deceleration function in the low speed range. By disposing the power flow front-end clutch unit 300 in front of the rear-stage planetary gear unit 400, the deceleration function is exhibited in the low-speed region and the synthesized power output is transmitted without deceleration in the high-speed region.

The above-described planetary gear train of the present invention can reliably control the power flow due to the structural features thereof, and can satisfy the load capability required in the operation of the tractor as the main application target of the transmission of the present invention .

The rear clutch unit 500 disposed downstream of the driving shaft 110 may include a forward clutch 501 and a reverse clutch 502. The forward clutch 501 and the forward clutch 502 The reverse clutch 502 may be configured to be connected to the third planetary gear carrier 403, respectively.

When the first clutch 301 is applied, the power synthesized through the first planetary gear 202 is transmitted through the third sun gear 401 and the third planetary gear 402, the third planetary gear carrier 403, And when the second clutch 302 is applied, the power synthesized through the second planetary gear 206 passes through the rear end clutch portion 500 and is finally output do.

The rear end clutch portion 500 is engaged with the output gear 120 to finally output the power via the output shaft 130. [ When the hydraulic pressure is applied to the forward clutch 501, the first output gear 121 engages and advances forward. When hydraulic pressure is applied to the reverse clutch 502, the second output gear 122 is engaged to perform reverse travel.

In other words, the planetary gear train according to the embodiment of the present invention has the minimum structure for performing the plurality of shift modes, and includes the two planetary gear units A rear end planetary gear unit 400 including a front end clutch unit 400, one sun gear, one carrier, and one ring gear, and a rear end clutch unit 500.

In this process, the mixing of the power occurs in the first planetary gear 202 and the second planetary gear 206 in combination. The gear elements of the forward planetary gear unit 200 and the gear elements of the rear planetary gear unit 500 are connected or disconnected from each other through the selective operation of the front end clutch unit 300 and the rear end clutch unit 500, The desired shift mode can be realized. In this process, the hydraulic power through the HSU module is synthesized, so that in addition to the discrete transmission according to the general mechanical transmission mode, it is possible to perform the fine transmission required for the operation of the tractor.

The planetary gear units 200 and 400 and the clutch units 300 and 500 as described above may adopt a cluster gear type to improve the durability of the entire planetary gear train. Also, the target output and the rotational speed of the transmission may be variously set according to the embodiment, and the specific gears and dimensions of the gears may be variously set accordingly.

Next, with reference to FIG. 3 to FIG. 5, an example of a shift mode for the mechanical hydraulic transmission of the present invention, a displacement amount of the HSU pump, and an output speed will be briefly described.

3 is a chart illustrating a shift mode of a mechanical hydraulic transmission according to an embodiment of the present invention. FIG. 4 is a graph of the exclusion volume of the HSU pump according to one embodiment of the present invention, and FIG. 5 is a graph of the output speed according to the exclusion volume of FIG.

Referring to Fig. 3, four shift modes are shown on the table. The forward travel and the backward travel of the tractor are determined depending on whether the forward clutch 501 and the reverse clutch 502 are applied. The first clutch 301 and the second clutch 302 are selectively applied to the forward clutch 501 and the reverse clutch 502 so that the forward clutch 501 and the reverse clutch 502 can not be applied. For example, when the first clutch 301 is applied in a state in which the forward clutch 501 is applied, the shift stage is shifted to the first forward stage to perform the one-stage shift.

The displacement volume refers to the geometric volume excluded per stroke of the piston provided in the displacement pump. Referring to FIG. 4, when the displacement volume increases gradually in the first stage, The volume reaches the maximum% (ex, 100%), and after the shifting, the displacement volume decreases toward the minimum% (ex, -100%).

In this process, the transmission output speed (rpm) gradually increases at the first stage, but increases more rapidly at the second stage. In the process of applying and releasing the clutch at the time of shifting, a shift shock occurs and a loss occurs in the output speed, but this is only a very small amount compared with the graph of the increase / decrease of the total output speed.

As can be seen from the graph above, when the mechanical hydraulic transmission of the present invention is used, it is possible to confirm a smoothe shifting pattern out of the discrete shifting pattern that occurs when only the mechanical transmission is used.

Finally, referring again to FIG. 2, another configuration of the transmission according to the present invention will be briefly described. The transmission case 100 of the present invention includes transmission elements such as the HSU module 600 and the front stage planetary gear unit 200, the front stage clutch unit 300, the rear stage planetary gear unit 400, the rear stage clutch unit 500, As shown in Fig. When the transmission elements are assembled in the transmission case 100, the transmission case 100 has a hollow interior for assembling the transmission elements, and when the transmission elements are assembled in the transmission case 100, And 102 are connected and sealed. The mission case 100 and the mission covers 101 and 102 must be able to be tightly coupled with each other by fastening mechanisms such as bolts and to protect components contained therein from the inflow of foreign matter such as rainwater or to prevent leakage of oil in the transmission It can be sealed as various sealing members.

Jigs 103 and 104 may be further provided inside the mission case 100 to firmly support the structure of the drive shaft 110, the HSU module, and the HSU output shaft 610. The jigs 103 and 104 can firmly support any one or more of the planetary gear units 200 and 400 and the clutch units 300 and 500 supported in parallel with the HSU module while supporting the HSU module.

Also, according to an embodiment of the present invention, an auxiliary hydraulic pump 700 may be additionally provided outside the mission case 100. The auxiliary hydraulic pump 700 may be connected to the drive shaft 110 and may supply hydraulic pressure to the HSU module 600 and the front stage clutch 300 or the rear stage clutch 500. [

According to the embodiment of the present invention, by adopting the HSU module, it is possible to increase the convenience and efficiency in changing the output speed of the work machine, and to combine the mechanical transmission means with the high power transmission efficiency of the transmission There is an effect that can be achieved.

In addition, a power branching type hydraulic hydraulic transmission is provided, and a combination of a series of gear trains and a clutch is configured to be compact, thereby ensuring high space efficiency in mounting a working machine such as a tractor.

In the foregoing detailed description of the present invention, only specific embodiments thereof have been described. It is to be understood, however, that the invention is not to be limited to the specific forms thereof, which are to be considered as being limited to the specific embodiments, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims. .

Those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

The scope of the present invention is defined by the appended claims rather than the foregoing description, and all changes or modifications derived from the meaning and scope of the claims and equivalents thereof are deemed to be included in the scope of the present invention. .

100: mission case 400: rear planetary gear unit
101, 102: Mission cover 401: Third sun gear
103, 104: jig 402: third planetary gear
110: drive shaft 403: third planetary gear carrier
111: Input gear 404: Brake part
120: Output gear 500:
130: output shaft 501: forward clutch
200: shear planetary gear unit 502: reverse clutch
201: first sun gear 601: HSU first input gear
202: first planetary gear 602: HSU second input gear
203: first planetary gear carrier 603: HSU third input gear
204: first ring gear 604: HSU first output gear
205: second sun gear 605: HSU second output gear
206: second planetary gear 606: HSU third output gear
207: second planetary gear carrier 610: HSU input shaft
208: second ring gear 610 ': HSU output shaft
300: front end clutch portion
301: first clutch
302: Second clutch

Claims (11)

In a mechanical hydraulic transmission,
A driving shaft (110) receiving power from the engine;
An HSU (Hydro Static Unit) module 600 that receives a part of the power from the drive shaft 110 and changes the output speed;
A front end planetary gear unit 200 for receiving power from the drive shaft 110 and power from the HSU module;
A front end clutch unit 300 connected to the front end planetary gear unit 200 to cut off or connect a power flow according to a set speed mode;
A rear end planetary gear unit 400 connected to the front end clutch unit 300;
A rear end clutch unit 500 connected to the rear stage planetary gear unit 400 to shut off or connect the power flow according to a set speed mode; And
And an output shaft (130) for outputting power shifted by interlocking the front end clutch unit (300) and the rear end clutch unit (500)
The shear planetary gear unit (200)
The first sun gear 201, the first planetary gear 202, the first planetary gear carrier 203, the first ring gear 204, the second sun gear 205, the second planetary gear 206, A gear carrier 207, and a second ring gear 208,
The front end clutch unit 300 includes:
A first clutch 301 for interrupting or connecting the power transmission through the second ring gear 208 and a second clutch 302 for interrupting or connecting the power transmission through the second sun gear 205 And is composed of two or more clutches,
The rear stage planetary gear unit 400,
Third planetary gear 401, third planetary gear 402, third planetary gear carrier 403, and third ring gear 404,
The third planetary gear carrier (403)
The second clutch (302), and the rear-end clutch (500), respectively.
The method according to claim 1,
Wherein the output shaft (130) is disposed in parallel to an axial direction of the drive shaft (110).
The method according to claim 1,
Wherein the HSU module (600) is disposed in parallel to an axial direction of the drive shaft (110).
The method of claim 3,
The HSU module 600 includes a series of gear trains constituted by a plurality of HSU input gears 601, 602 and 603 located downstream of the drive shaft 110 and a plurality of HSU outputs Is located between a series of gear trains constituting the gears (604, 605, 606).
The method according to claim 1,
The power transmission from the drive shaft 110 to the output shaft 130 is sequentially performed along the front stage planetary gear unit 200, the front stage clutch unit 300, the rear stage planetary gear unit 400, and the rear stage clutch unit 500 Features a mechanical hydraulic transmission.
delete delete delete The method according to claim 1,
The third ring gear 404 is fixed to the transmission case,
And the second clutch (302) meshes with the third planetary gear (402).
delete The method according to claim 1,
Wherein the rear end clutch portion (500) includes a forward clutch (501) and a reverse clutch (502).

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