CN219007599U - Power transmission system and working machine - Google Patents

Abstract

The utility model relates to the technical field of engineering machinery, and provides a power transmission system and a working machine, wherein the power transmission system comprises: the engine comprises an engine body, an output shaft connected with the engine body and a flywheel connected with the output shaft, wherein the output shaft is connected with a power takeoff at a position between the engine body and the flywheel, the output shaft is connected with a first load mechanism, and the power takeoff is connected with a second load mechanism through a first transmission shaft. According to the power transmission system and the working machine, the power takeoff is directly connected to the engine to output power, different loads can be connected to the engine at the positions of the output shaft and the power takeoff, the second load mechanism directly takes power at the positions of the power takeoff, the power output of the engine to different loads can be achieved without a transfer case, a transmission chain is shortened, transmission efficiency is improved, cost is reduced, the transfer case is not required, failure rate is reduced, and maintenance and replacement of components of a system are facilitated.

Description

Power transmission system and working machine

Technical Field

The utility model relates to the technical field of engineering machinery, in particular to a power transmission system and a working machine.

Background

The existing concrete pump truck power transmission system mostly adopts a broken shaft power taking scheme, namely a power transmission scheme of an engine, a gearbox, a transmission shaft, a transfer case and an oil pump, the scheme needs to modify the original chassis transmission shaft, the transfer case is additionally arranged between the transmission shafts, the transfer case is respectively connected with a main oil pump, an arm support pump and a running mechanism, power transmission between the engine and a hydraulic oil pump is achieved, and the transfer case is used for switching between pumping and running states, so that pumping and running functions are achieved, and the scheme is shown in fig. 1.

When an engine needs to drive a plurality of loads, the existing engineering machinery such as concrete pump trucks and the like generally needs to be provided with a special transfer case for connecting the plurality of loads in a power transmission scheme. The existing engineering machinery power transmission scheme has the defects of long transmission chain, low transmission efficiency, high cost, higher failure rate of the transfer case and difficult maintenance and replacement.

Disclosure of Invention

The utility model provides a power transmission system and a working machine, which are used for solving the problems of long transmission chain, low transmission efficiency, high cost, high failure rate of a transfer case and difficult maintenance and replacement of the existing power transmission scheme of engineering machinery and improving the power transmission efficiency.

The present utility model provides a drivetrain comprising: the engine comprises an engine body, an output shaft connected with the engine body and a flywheel connected with the output shaft, wherein the output shaft is connected with a power takeoff at a position between the engine body and the flywheel, the output shaft is connected with a first load mechanism, and the power takeoff is connected with a second load mechanism through a first transmission shaft.

According to the power transmission system provided by the utility model, the power takeoff is a full-power takeoff; the power takeoff is connected with the first end of the first transmission shaft through a connecting flange.

According to the power transmission system provided by the utility model, the second end of the first transmission shaft is connected with the second load mechanism through the elastic coupling mechanism.

According to the power transmission system provided by the utility model, the elastic coupling mechanism comprises a shell, a second transmission shaft, a bearing and an elastic coupling, wherein the second transmission shaft is hermetically arranged in the shell through the bearing, the first end of the second transmission shaft is provided with an input flange, the input flange is connected with the second end of the first transmission shaft, the second end of the second transmission shaft is provided with a shaft end flange, the shaft end flange is connected with the elastic coupling, the elastic coupling is connected with the input shaft of the second load mechanism through a key structure, and the shell is connected with the second load mechanism.

According to the power transmission system provided by the utility model, the shell is arranged on the equipment foundation, and a damping structure is arranged between the shell and the equipment foundation.

According to the power transmission system provided by the utility model, the setting angles of the first transmission shaft, the input shaft of the second load mechanism and the output shaft of the engine are the same.

According to the power transmission system provided by the utility model, the first load mechanism is a running mechanism, and the running mechanism comprises an axle gear box; the output shaft is connected with the axle gear box through a clutch gear box and a third transmission shaft.

According to the power transmission system provided by the utility model, the second load mechanism is an oil pump assembly, and the oil pump master pump comprises a plurality of oil pumps connected in series.

The utility model also provides a working machine comprising a power transmission system according to any one of the preceding claims.

According to the working machine provided by the utility model, the working machine is a concrete pump truck, the second load mechanism is an oil pump assembly, and the oil pump assembly comprises a main oil pump, an arm support pump and a duplex gear pump which are sequentially connected in series; the oil pump assembly is arranged on the inner side of the auxiliary beam assembly of the concrete pump truck and is positioned at the rear end below the turret assembly.

According to the power transmission system and the operation machine, the power take-off port is directly arranged on the engine to output power, different loads can be connected to the engine at the output shaft and the power take-off port, the second load mechanism directly takes off power at the power take-off port, the power output of the engine to different loads can be realized without arranging a transfer case, the transmission chain is shortened, the transmission efficiency is improved, the cost is reduced, the transfer case is not required, the failure rate is reduced, and the maintenance and the replacement of components of the system are facilitated.

Drawings

In order to more clearly illustrate the utility model or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a prior art concrete pump truck power transmission system;

FIG. 2 is a schematic diagram of a powertrain system provided by the present utility model;

FIG. 3 is a schematic view of the structure of the elastic coupling mechanism provided by the present utility model;

reference numerals:

1: an engine; 2: a power take-off; 3: a connecting flange; 4: a first drive shaft; 5: an elastic coupling mechanism; 51: a housing; 52: a second drive shaft; 53: an input flange; 54: a bearing; 55: an outer ring of the elastic coupling; 56: an inner ring of the elastic coupling; 57: a mounting plate; 58: a mounting base; 59: a shaft end flange; 6: a clutch gearbox; 7: a third drive shaft; 8: an axle gear box; 9: an oil pump assembly; 91: a main oil pump; 92: boom pump; 93: a duplex gear pump.

Detailed Description

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

The powertrain system and the work machine of the present utility model are described below with reference to fig. 2 through 3.

Referring to fig. 2, the present embodiment provides a power transmission system including: the engine 1, engine 1 include the engine body, with the output shaft of engine body coupling and with output shaft connection's flywheel, the output shaft be in the engine body with the position between the flywheel is connected with power takeoff 2, the output shaft is connected with first load mechanism, power takeoff 2 is connected with second load mechanism through first transmission shaft 4.

The engine 1 can drive the first load mechanism to operate through the output shaft. Meanwhile, the engine 1 is connected with a power takeoff 2, and the engine 1 can also output power through the power takeoff 2. The engine 1 can drive the second load mechanism to operate through the power takeoff 2 and the first transmission shaft 4. Further, the power takeoff 2 has a clutch function, and the on-off of power output at the power takeoff 2 of the engine 1 can be controlled to adapt to different working conditions. When the first load mechanism is required to work, the controllable power takeoff 2 is disconnected, and the output shaft of the engine 1 is controlled to output power so as to drive the first load mechanism to operate; when the second load mechanism is required to work, the power takeoff 2 can be controlled to be connected, and the power take-off port of the engine 1 is controlled to output power so as to drive the second load mechanism to operate.

According to the power transmission system provided by the embodiment, the power takeoff 2 is directly connected to the engine 1 to output power, the engine 1 can be connected with different loads at the output shaft and the power takeoff 2, the second load mechanism can directly take power at the power takeoff 2, the power output of the engine 1 to the different loads can be realized without a transfer case, a transmission chain is shortened, the transmission efficiency is improved, the cost is reduced, the transfer case is not required to be arranged, the failure rate is reduced, and the system is convenient to maintain and replace parts.

Further, in this embodiment, the power take-off 2 is connected to the output shaft section between the engine body and the flywheel, so that power can be led out from the front side of the engine, i.e. the side where the output shaft is arranged, and the first transmission shaft and the output shaft can be located on the same side of the engine body, thereby being beneficial to reducing the installation occupation space of the power transmission system and improving the integration level of the power transmission system.

Further, the engine also comprises a shell, the shell is arranged outside the engine body and the flywheel, and the output shaft penetrates out of the shell. The corresponding part of the shell can be provided with a force taking opening, namely an opening, and the force taking device 2 is arranged at the force taking opening. Specifically, the power take-off port is provided above the flywheel housing of the engine 1. A force taking port can be arranged at the upper end of a flywheel shell of the engine 1; namely, a force taking port is arranged at a position above a flywheel housing of the engine 1. The power takeoff 2 is connected with a crankshaft of the engine 1 through a gear train at the front end of the engine 1, so that the power output of the engine 1 is realized. Namely, the power of the engine 1 can be led out by arranging a gear structure at the power take-off port. The power takeoff 2 is of a clutch structure and is used for controlling the on-off of power transmission at a power take-off port.

On the basis of the above embodiment, further, the power takeoff 2 is a full-power takeoff; the full power output of the engine 1 can be achieved, i.e. the maximum torque of the engine 1 can be obtained. The power takeoff 2 is connected to a first end of the first drive shaft 4 via a connecting flange 3. The one end that power takeoff 2 is close to first transmission shaft 4 is equipped with flange 3, and the first end of first transmission shaft 4 is equipped with flange, and flange 3 and first transmission shaft 4 pass through flange structure and connect, realize power take off, firm in connection, easy to assemble.

Further, on the basis of the above embodiment, the second end of the first transmission shaft 4 is connected to the second load mechanism through an elastic coupling mechanism 5. The second end of the first transmission shaft 4 is connected with a second load mechanism to realize power output. And an elastic coupling mechanism 5 is provided between the second end of the first drive shaft 4 and the second load mechanism. The elastic coupling mechanism 5 has a coupling function, can realize shaft connection to transmit power, and has a certain elasticity, and can allow a certain misalignment between the first transmission shaft 4 and the input shaft of the second load structure. The elastic coupling mechanism 5 is arranged, so that the elastic connection of a power transmission system can be realized, the installation difficulty is reduced, and the installation is convenient.

Specifically, the elastic coupling mechanism 5 includes an elastic coupling. An elastic coupling may be provided for connecting the first drive shaft 4 and the second load mechanism, achieving an elastic connection of the two.

On the basis of the above embodiment, further, referring to fig. 3, the elastic coupling mechanism 5 further includes a housing 51, a second transmission shaft 52 and a bearing 54, the second transmission shaft 52 is sealed inside the housing 51 by the bearing 54, a first end of the second transmission shaft 52 is provided with an input flange 53, the input flange 53 is connected with a second end of the first transmission shaft 4, a second end of the second transmission shaft 52 is provided with an axial end flange 59, the axial end flange 59 is connected with the elastic coupling, the elastic coupling is connected with an input shaft of the second load mechanism by a key structure, and the housing 51 is connected with the second load mechanism.

The present embodiment provides a specific arrangement structure of the elastic coupling mechanism 5. In this embodiment, the elastic coupling mechanism 5 is mainly an elastic coupling, and is used for realizing the installation connection of the elastic coupling by arranging the housing 51, the second transmission shaft 52 and the bearing 54. Specifically, the cross section of the housing 51 may be a circular structure; the second transmission shaft 52 is provided inside the housing 51 in the axial direction of the housing 51, and a bearing 54 is provided at the outer periphery of the second transmission shaft 52, the bearing 54 being mounted and fixed on the inner wall of the housing 51, so that the second transmission shaft 52 is mounted and fixed to the housing 51 through the bearing 54 and rotatable relative to the housing 51. Further, the bearing 54 also provides a sealed connection between the second drive shaft 52 and the housing 51. Can be realized by arranging a sealing structure such as a sealing ring at the relevant part.

Specifically, both ends of the housing 51 are provided with openings, respectively. One end of the second transmission shaft 52, which is close to the first transmission shaft 4, penetrates out of the shell 51, and a sealing structure such as a sealing ring is arranged between the part of the second transmission shaft 52 penetrating out of the shell 51 and the shell 51, so that the second transmission shaft 52 and the shell 51 are sealed. The end of the second drive shaft 52 that protrudes out of the housing 51 is connected to an input flange 53 on the outer wall. The input flange 53 is used for being connected with a connecting flange at the second end of the first transmission shaft 4 to realize power transmission. The end of the second drive shaft 52 adjacent the second load mechanism is provided with a shaft end flange 59. The elastic coupling is provided inside the housing 51 between the second drive shaft 52 and the second load mechanism. The shaft end flange 59 is connected with the outer ring 55 of the elastic coupling, and can be connected through bolts to realize the installation and fixation of the elastic coupling. The inner ring 56 of the elastic coupling is provided with an inner hole, and the input shaft of the second load mechanism is inserted into the inner hole of the inner ring 56 of the elastic coupling and is connected through a key structure to realize power transmission.

Further, a mounting plate 57 is provided at one end of the housing 51 near the second load mechanism, and the mounting plate 57 is connected to the second load mechanism. Specifically, the mounting plate 57 is connected with the housing of the second load mechanism, so that the elastic coupling mechanism 5 and the second load mechanism are fixedly connected, and the stability and the firmness of the shaft connection for power transmission are improved. When the second load mechanism is required to operate, the power takeoff 2 is controlled to be connected, the power of the engine 1 is transmitted to the power takeoff 2 through the power take-off port, then the first transmission shaft 4 is driven to rotate through the connecting flange 3, the first transmission shaft 4 drives the second transmission shaft 52, the second transmission shaft 52 drives the elastic coupling, the elastic coupling drives the input shaft of the second load mechanism, and power transmission is sequentially achieved.

Specifically, the housing 51 is of a hollow structure, and the housing 51 has a first housing section with a smaller inner diameter and a second housing section with a larger inner diameter along the axial direction, the first housing section is arranged close to the first transmission shaft 4, and the second housing section is arranged close to the second load mechanism. The inner diameter of the first shell section is smaller than the second shell section. The second transmission shaft 52 is disposed in the first casing section, and one end of the second transmission shaft 52, which is close to the first transmission shaft 4, penetrates out of the first casing section of the casing 51, and one end of the second transmission shaft 52, which is close to the second load mechanism, extends into the second casing section, and the bearing 54 is disposed in the first casing section. The elastic coupling is arranged inside the second shell section.

The outer wall of the end of the housing 51 near the second loading mechanism may be provided with a protruding edge, i.e. the mounting plate 57, extending outwards. I.e. the mounting plate 57 is provided on the outer wall of the housing 51 for connection and fixation with the outer shell of the second load mechanism.

Further, on the basis of the above embodiment, the housing 51 is mounted to the apparatus base. The components used for installing and fixing the elastic coupling mechanism 5 and the second load mechanism in the application environment of the equipment foundation, namely the power transmission system, namely the installation and fixing components of the elastic coupling mechanism 5, can be set according to the specific application environment without limitation. The housing 51 is fixed to the installation of the device foundation in the application environment, so that the elastic coupling mechanism 5 and the second load mechanism can be fixed to each other.

And a shock-absorbing structure is provided between the housing 51 and the equipment foundation. The damping structure may be a damping pad or a filling damping material, and the damping pad may be a flexible pad or an elastic pad, so as to achieve damping and buffering, which is not limited in detail. Specifically, the installation seat 58 can be fixedly arranged on the basis of the device, the shell 51 is supported and placed on the installation seat 58, and a damping structure can be arranged between the shell 51 and the installation seat 58.

Specifically, referring to fig. 3, a mounting seat 58 may be fixedly connected to the equipment foundation, a connection hole is formed in the mounting seat 58, a connection shaft may be disposed on an outer wall of the housing 51, and the connection shaft is inserted into the connection hole to connect the housing 51 and the mounting seat 58, so that the housing 51 is fixed to the equipment foundation. Specifically, a damping structure can be arranged between the connecting shaft and the connecting hole.

In other embodiments, the connection and fixation structure between the housing 51 and the device base may be other, and the purpose of enabling the mounting and fixation of the housing 51 is not specifically limited.

Further, on the basis of the above-described embodiment, the first transmission shaft 4, the input shaft of the second load mechanism, and the output shaft of the engine 1 are set at the same angle. Namely, the first drive shaft 4, the input shaft of the second load mechanism, and the output shaft of the engine 1 have the same inclination angle with respect to the horizontal plane. That is, when the second load mechanism is installed, the setting angle of the input shaft of the second load mechanism is the same as the setting angle of the output shaft of the engine 1, so that the first transmission shaft 4 is connected, and the power transmission of the engine 1 is realized.

Specifically, the axial direction of the output shaft of the power takeoff 2 connected to the power take-off port of the engine 1 is parallel to the axial direction of the output shaft of the engine 1, so that in order to realize power transmission from the power take-off port to the second load mechanism, the setting angle of the input shaft of the second load mechanism is the same as the setting angle of the output shaft of the engine 1. And the axial direction of the output shaft of the power takeoff 2, the axial direction of the first transmission shaft 4 and the axial direction of the input shaft of the second load mechanism are positioned on the same straight line so as to smoothly realize power transmission.

Further, on the basis of the above embodiment, the first load mechanism is a running mechanism including an axle gear box 8; the output shaft is connected with the axle gear box 8 through a clutch gear box 6 and a third transmission shaft 7. That is, the present embodiment provides a specific application example of a power transmission system for a work machine, and the first load mechanism may be a running mechanism of the work machine for realizing a running function of the work machine by the engine 1.

Specifically, the clutch gearbox 6 includes a gearbox clutch and a gearbox, the output shaft of the engine 1, the gearbox clutch, the gearbox, the third transmission shaft 7 and the axle gear box 8 are sequentially connected, and the axle gear box 8 is connected with wheels. When the working machine needs to run, the clutch of the gearbox can be controlled to be connected so as to transmit the power of the engine 1 to the axle gearbox 8 to drive the wheels to rotate, and the running function is realized.

Further, on the basis of the above embodiment, the second load mechanism is an oil pump assembly 9, and the oil pump assembly includes a plurality of oil pumps connected in series. The present embodiment provides a specific application example of a power transmission system, in this embodiment, the power transmission system is used for a working machine, the second load mechanism may be an oil pump assembly of the working machine, and the oil pump assembly is set to be the oil pump assembly 9, so that the engine 1 drives the oil pump assembly 9 to drive a corresponding executing mechanism of the working machine to work.

In this embodiment, the oil pumps are sequentially connected in series to form the oil pump assembly 9 to be connected with the engine 1, and compared with the case that the oil pumps are separately connected in a dispersed manner, the power transmission route can be reduced, the power transmission system is simplified, the installation is convenient, and the transmission efficiency is improved. Specifically, a plurality of oil pumps in the oil pump assembly 9 are respectively connected with corresponding executing mechanisms through oil ways, and valves can be arranged on the oil ways to control the on-off of the oil ways so as to control the operation of the corresponding executing mechanisms.

Further, in other embodiments, specific components of the first load mechanism and the second load mechanism may be other, and may be flexibly set according to a specific application environment of the power transmission system, so as to use the power transmission system to drive different loads to operate, which is not limited in particular.

Further to the above embodiments, the present embodiment provides a work machine including the drivetrain according to any one of the above embodiments. The working machine is a machine with a plurality of load mechanisms, and by using the power transmission system, the engine 1 can be used for driving different load mechanisms, and a transfer case is not required to be arranged, so that the transmission efficiency is improved.

On the basis of the embodiment, further, the working machine is a concrete pump truck, the second load mechanism is an oil pump assembly 9, and the oil pump assembly 9 comprises a main oil pump 91, a boom pump 92 and a duplex gear pump 93 which are sequentially connected in series; the oil pump assembly 9 is arranged on the inner side of the auxiliary beam assembly of the concrete pump truck and is positioned at the rear end below the turret assembly.

The embodiment provides a working machine specifically applying the power transmission system, in this embodiment, the working machine is a concrete pump truck, in this embodiment, the concrete pump truck is provided with a main oil pump 91, a boom pump 92 and a duplex gear pump 93, and in this embodiment, the main oil pump 91, the boom pump 92 and the duplex gear pump 93 are sequentially connected in series to form an oil pump assembly 9. The oil pump assembly 9 can be in driving connection with a power take-off port of the engine 1, and the engine 1 can drive the oil pump assembly 9 to operate. The oil pump assembly 9 is beneficial to reducing transmission routes, is convenient to set and improves transmission efficiency. Further, the first load mechanism in this embodiment may be a running mechanism.

Specifically, the main oil pump 91 controls the operation of the main oil cylinder and the swing cylinder through the connection of an oil way and a valve according to the conventional concrete pump truck; the boom pump 92 is connected with a boom multi-way valve to control a slewing mechanism, a knuckle boom and a landing leg system according to the conventional concrete pump truck; the dual gear pump 93 is connected to other corresponding actuators, such as a stirring system, a cooling system, etc., according to conventional concrete pump truck settings. The common concrete pump truck comprises a chassis, a turret assembly and a supporting leg system; the turret assembly is arranged on the chassis and used for connecting the slewing mechanism and the arm support, and the supporting leg system is connected with the turret assembly; the chassis is connected with an auxiliary beam. The oil pump assembly 9 may be mounted inside the secondary beam assembly and located in a rear position below the turret assembly. Namely, the oil pump assembly 9 is positioned at one side of the auxiliary beam, which is close to the middle part of the chassis of the concrete pump truck in the width direction, and is positioned at one side, which is close to the tail of the concrete pump truck, below the turret assembly.

Further, the work machine may be another machine that requires the engine 1 to drive a plurality of loads, such as a crane, and the like, and is not particularly limited.

On the basis of the embodiment, further, based on the scheme of taking force of the broken shaft of the traditional concrete pump truck, a special transfer case needs to be arranged, a transmission chain is longer, transmission efficiency is low, cost is high, the failure rate of the transfer case is high, and maintenance and replacement are difficult.

Specifically, the embodiment provides a full-power take-off transmission system of an oil pump rear-mounted pump truck, which mainly comprises an upper transmission system and a chassis transmission system, wherein the upper transmission system comprises an engine 1, a full power take-off 2, a full power take-off connecting flange 3, a first transmission shaft 4, an elastic coupling mechanism 5 and an oil pump assembly 9; the oil pump assembly 9 is connected with the full-power connecting flange 3 of the engine 1 through the elastic coupling mechanism 5 and the first transmission shaft 4; the oil pump assembly 9 is arranged at the rear end below the turret assembly of the pump truck and at the inner side of the auxiliary beam assembly, so that the oil pump assembly 9 can be arranged in a rear-mounted manner, and the hydraulic pipeline arrangement is facilitated. The chassis transmission system comprises an engine 1, a flywheel of the engine 1, a gearbox clutch, a gearbox, a third transmission shaft 7, an axle gear box 8 and wheels, and power is transmitted to the wheels step by the engine 1.

The full-power-taking connecting flange 3 of the upper transmission system is connected with the crankshaft of the engine 1 through the full power takeoff 2 and the front wheel train of the engine 1, so that the full power output of the engine 1 can be realized. The oil pump assembly 9 of the upper transmission system is formed by connecting a main oil pump 91, an arm support pump 92 and a duplex gear pump 93 in series, and is obliquely arranged on the inner side of the auxiliary beam at a certain angle, and the inclination angle is the same as the installation angle of the engine 1 so as to adapt to the requirement of the installation angle of the transmission shaft. For example, when the engine 1 is mounted at an angle of 3 ° to the horizontal, the oil pump assembly 9 is correspondingly mounted at an angle of 3 °.

The front end of the oil pump assembly 9 of the upper transmission system is provided with an elastic coupling mechanism 5, and the elastic coupling mechanism 5 comprises an elastic coupling which is arranged in the shell 51. The elastic coupling mechanism 5 further comprises a second transmission shaft 52 and a bearing 54. The second transmission shaft 52 is axially arranged in the shell 51 through two sealed bearings 54, an input flange 53 is arranged at the front end of the second transmission shaft 52 and is connected with the flange of the first transmission shaft 4, a shaft end flange 59 is arranged at the rear end of the second transmission shaft and is used for installing an elastic coupling outer ring 55, an elastic coupling inner ring 56 is connected with the input shaft of a main oil pump 91 through a spline, the shell 51 is connected with the oil pump through a mounting plate 57, and the mounting plate 57 is arranged on the inner side of an auxiliary beam through a shock pad. The installation of the elastic coupling mechanism 5 is realized, and the connection between the drive shaft and the main oil pump 91 is completed.

The chassis transmission system is an original chassis transmission system, and power is transmitted to wheels through a gearbox clutch, a gearbox, a transmission shaft and an axle gear box 8, so that the running function of the vehicle is realized.

The working principle of the full-power taking transmission system of the oil pump rear pump truck is as follows: in the working state, the front end gearbox clutch of the gearbox is separated, the full power takeoff 2 is meshed, the power of the engine 1 is transmitted to the main oil pump 91 through the full power takeoff connecting flange 3, the first transmission shaft 4 and the elastic coupling mechanism 5, and the main oil pump 91 works to drive the working parts to complete the appointed action.

In a running state, a gearbox clutch at the front end of the gearbox is engaged, the full power takeoff 2 is separated, and the power of the engine 1 is transmitted to an axle gearbox 8 through the gearbox and a transmission shaft and drives wheels to rotate, so that a vehicle running function is realized.

The embodiment is characterized in that a full-power take-off connecting flange is arranged at the upper end of an engine flywheel shell and is connected with an oil pump assembly through a first transmission shaft and an elastic coupling mechanism, power transmission does not pass through a gearbox, the short transmission efficiency of a power chain is high, the installation position of the oil pump assembly can be adjusted by adjusting the length and the installation angle of the first transmission shaft in the connecting mode, and the problem of difficult arrangement of hydraulic pipelines is solved; on the basis of ensuring the functional requirement of the pump truck, the transfer case structure in the original pump truck broken shaft power taking transmission scheme is removed, so that the arrangement space and the cost are effectively saved, the length of a transmission chain is shortened, the transmission efficiency is improved, and the pumping oil consumption is reduced; the front end of the full-power connecting flange at the upper end of the flywheel shell of the engine is provided with a clutch, so that the clutch function between the oil pump and the engine can be realized; the front end of the oil pump is provided with an elastic coupling mechanism, so that the elastic connection of a power transmission system can be realized, and the absorption rate of load change to the rigid impact of the system is improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. A drivetrain, comprising: the engine comprises an engine body, an output shaft connected with the engine body and a flywheel connected with the output shaft, wherein the output shaft is connected with a power takeoff at a position between the engine body and the flywheel, the output shaft is connected with a first load mechanism, and the power takeoff is connected with a second load mechanism through a first transmission shaft.

2. The drivetrain of claim 1, wherein the power take-off is a full power take-off; the power takeoff is connected with the first end of the first transmission shaft through a connecting flange.

3. The drivetrain of claim 1, wherein the second end of the first drive shaft is coupled to the second load mechanism via an elastic coupling mechanism.

4. A drivetrain according to claim 3, wherein the resilient coupling comprises a housing, a second drive shaft, a bearing and a resilient coupling, the second drive shaft being sealingly arranged within the housing by the bearing, a first end of the second drive shaft being provided with an input flange, the input flange being connected to a second end of the first drive shaft, a second end of the second drive shaft being provided with a shaft end flange, the shaft end flange being connected to the resilient coupling, the resilient coupling being connected to an input shaft of the second load mechanism by a key arrangement, the housing being connected to the second load mechanism.

5. The drivetrain of claim 4, wherein the housing is mounted to an equipment foundation with a shock absorbing structure disposed between the housing and the equipment foundation.

6. The power transmission system according to any one of claims 1 to 5, wherein the first drive shaft, the input shaft of the second load mechanism, and the output shaft of the engine are disposed at the same angle.

7. A drivetrain according to any one of claims 1 to 5, wherein the first load mechanism is a chassis comprising an axle gearbox; the output shaft is connected with the axle gear box through a clutch gear box and a third transmission shaft.

8. The powertrain system of any one of claims 1 to 5, wherein the second load mechanism is an oil pump assembly, the oil pump assembly including a plurality of oil pumps connected in series.

9. A work machine comprising a drivetrain according to any one of claims 1 to 8.

10. The work machine of claim 9, wherein the work machine is a concrete pump truck and the second load mechanism is an oil pump assembly comprising a main oil pump, a boom pump, and a dual gear pump in series; the oil pump assembly is arranged on the inner side of the auxiliary beam assembly of the concrete pump truck and is positioned at the rear end below the turret assembly.

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