CN214999215U

CN214999215U - Power box body for electric wheel type engineering machinery

Info

Publication number: CN214999215U
Application number: CN202120793368.3U
Authority: CN
Inventors: 刘艳芳; 崔国敏; 乔征; 张卫东; 曹健榕; 李治江; 王群英
Original assignee: Tianjin Research Institute Of Construction Machinery Co ltd
Current assignee: Tianjin Research Institute Of Construction Machinery Co ltd
Priority date: 2021-04-16
Filing date: 2021-04-16
Publication date: 2021-12-03
Anticipated expiration: 2031-04-16

Abstract

The utility model discloses a power box body for electric wheel type engineering machinery, which comprises a gearbox, a transfer case and a power output box; the transfer case is positioned at the upper part of the gearbox; the power output box is positioned at the lower part of the gearbox; the gearbox and the transfer case are provided with case covers; the transfer case is provided with a hydraulic pump PTO interface and a transmission pump PTO interface; one side of the power output box is provided with a front axle driving interface, and the other side of the power output box is provided with a rear axle driving interface. The power box body can integrate a hydraulic pump motor, a walking driving motor, a hydraulic pump PTO transfer case, a gearbox, front and back outputs and the like of a working device into an integrated power assembly, and directly replace a traditional engine, a torque converter and a hydraulic transmission gearbox under the condition of not changing the structure and the oil circuit of a traditional engineering vehicle; the power assembly can meet independent driving of a hydraulic pump, a steering pump and engineering machinery of a working device, forward and backward can be realized by adopting motor driving and utilizing reverse rotation of a motor, and a reversing mechanism with complicated transmission is replaced.

Description

Power box body for electric wheel type engineering machinery

Technical Field

The utility model belongs to electronic wheeled engineering machine tool especially relates to an electronic power box for wheeled engineering machine tool.

Background

In recent years, various electric vehicle technologies are gradually mature, reliable and especially economic electric vehicle products are consumed year by year, and the market acceptance is very considerable. With the regulation and control upgrading of environmental protection policies, the national requirements on ecological environment protection are higher and higher, and engineering machinery enterprises also need to actively take the actions of energy conservation and emission reduction to finish the industrial upgrading as soon as possible. In particular, in certain specific working environments such as municipal administration, ports and underground operation, zero emission thresholds are provided for engineering machinery to enter fields by related departments.

Electric vehicles have driven core components and technologies such as motors, batteries, electronic control, rapid charging and discharging, and the like to become mature day by day, and the development and application of electric engineering machinery have been a necessary trend.

The electric wheel type engineering machine is a general engineering machine, and has wide application fields, such as farmland renovation, engineering construction, factories and mines, ports and the like. At present, the mainstream electric wheel type engineering machinery in China still adopts a traditional internal combustion engine as power, and the transmission modes are hydraulic mechanical transmission and hydraulic transmission, so that the defects of poor fuel economy and high pollution emission are overcome.

The electric wheel type engineering machinery takes electric energy as energy and the motor as power, has strong load adaptability, is convenient to operate, saves energy and protects environment. The existing electric wheel type engineering machinery in the market at present mainly has two transmission types, one is to adopt a motor to replace an engine and adopt the existing hydraulic mechanical transmission speed changer, and the electric wheel type engineering machinery has the advantages of compact structure, lower cost and low transmission efficiency and can not effectively utilize electric energy.

The other type is that two motors are adopted, one motor drives a hydraulic pump of a working device, the other motor drives the working device to travel, and the two motors are respectively and independently placed, so that the difficulty is brought to the arrangement and maintenance of the whole machine.

The power box body is taken as a core component of the power assembly of the electric wheel type engineering machinery, the traditional box body and the existing electric box body are connected by a single motor, the integrated assembly of double motors cannot be realized, in addition, the power box body can be produced as a product with independent functions, therefore, the utility model provides and protects the power box body for the electric wheel type engineering machinery; the double-motor, oil-electricity hybrid and extended-range power assembly is suitable for the installation arrangement and working requirements of electric wheel type engineering machinery, and can directly replace a traditional engine, a torque converter and a hydraulic transmission gearbox.

SUMMERY OF THE UTILITY MODEL

The problem that exists to prior art, the utility model provides a high integration can satisfy the independent drive of equipment hydraulic pump and steering pump, and the electronic wheeled engineering machine tool walking of the also independent drive of walking driving motor can reach compact structure, maintenance convenience, cost are lower, make electronic wheeled engineering machine tool obtain the best working property to improve work efficiency's purpose power box for electronic wheeled engineering machine tool.

The utility model discloses a realize like this, a power box for electronic wheeled engineering machine tool, its characterized in that: the power box body comprises a gearbox, a power input mechanism and a speed change gear shifting mechanism, wherein the gearbox is used for mounting a walking power input mechanism and the speed change gear shifting mechanism; a transfer case for mounting a working device power unit; the power output box is used for installing the power output mechanism; the transfer case is positioned at the upper part of the gearbox; the power output box is positioned at the lower part of the gearbox; the gearbox, the transfer case and the power output case are in a communicated structure in the case body; the same side of the gearbox and the transfer case is of an open structure, and a case cover is arranged on the open side of the open structure; a hydraulic pump PTO interface is arranged on the transfer case on the opposite side of the case cover, and a transmission pump PTO interface is arranged below or above the hydraulic pump PTO; a walking driving motor mounting interface for mounting a walking driving motor is arranged on one side of the gearbox; a parking brake mounting seat for mounting a parking brake is arranged on the gearbox; a gear shifting control valve mounting interface is arranged on the gear box; one side of the power output box is provided with a front axle driving interface, and the other side of the power output box is provided with a rear axle driving interface.

Preferably, the transfer case and the power output case are arranged diagonally or symmetrically or on the same side relative to the gearbox.

Preferably, the transfer case on the opposite side of the case cover is provided with three PTO interfaces for the hydraulic pump; the upper left hydraulic pump PTO interface and the upper right hydraulic pump PTO interface are used for installing a hydraulic pump and a steering hydraulic pump of a working device, and the lower middle hydraulic pump PTO interface is a transmission pump PTO interface.

Preferably, two hydraulic pump PTO interfaces are arranged on the same horizontal centerline; the transmission pump PTO interface is located on a vertical centerline between the two working device hydraulic pump PTO interfaces.

Preferably, the travel drive motor mounting interface is located on the same side or on a different side than the hydraulic pump PTO device interface on the transfer case.

Preferably, at least two shaft holes are provided in the transmission case. The number of shaft holes provided in the transmission case is determined according to the power transmission device installed therein, and two shaft holes are provided in this embodiment.

Preferably, the bottom of the power output box is provided with a support foot.

The side surface of the power output box is also provided with an electric element mounting hole for mounting and detecting the rotating speed; the lower part of the power output box is provided with an oil absorption filter interface; an oil absorption filter is arranged on the oil absorption filter interface; the power output box is provided with an oil filling hole and an oil drain hole; the oil drain hole is arranged at the bottom of the power output box; an oil level observation hole is also arranged on the power output box.

The utility model has the advantages and technological effect: the power box can integrate a hydraulic pump motor, a walking driving motor, a hydraulic pump PTO transfer case, a gearbox, front and rear outputs and the like of a working device into a whole, can be realized by adopting the structural layout, and can directly replace a traditional engine, a hydraulic torque converter and the gearbox under the condition of not changing the structure and the oil circuit of a traditional engineering vehicle. The utility model discloses a power box body is used for the power assembly, realizes directly utilizing the electric energy of power battery promptly, takes the motor as power, can satisfy the requirement of electronic wheeled engineering machinery economy, dynamic property and travelling comfort, is an ideal transmission form; the electric motor has a wider stepless speed regulation range, good starting characteristic and higher transmission efficiency, and the electric motor and the two-gear power gear shifting transmission are integrated into a power assembly, so that the traction force and the vehicle speed requirements of the engineering machinery can be considered according to the working characteristics of the engineering machinery. The hydraulic pump and the steering pump of the working device can be independently driven, the traveling driving motor can also independently drive the engineering machinery to travel, and for the vehicle which needs to frequently advance and retreat during the working of the engineering machinery, the motor is adopted to drive the vehicle to advance and retreat by utilizing the reverse rotation of the motor, so that a reversing mechanism with complex transmission is replaced; the utility model discloses can reach compact structure, maintenance convenience, cost are lower, make engineering machine obtain the best working property to improve work efficiency's purpose, adopt above-mentioned power box body can assemble bi-motor drive power assembly, hybrid assembly, increase form power assembly, and then can satisfy the independent drive of equipment hydraulic pump and steering pump, the walking motor also can independently drive the loader walking.

Drawings

FIG. 1 is a schematic structural diagram of embodiment 1 of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a schematic illustration of the symmetrical arrangement of the transfer case and the pto case with respect to the transfer case;

FIG. 4 is a schematic view of the transfer case and pto case being disposed on the same side relative to the transmission;

FIG. 5 is a schematic view of a dual-motor power assembly according to an embodiment of the present invention;

FIG. 6 is a schematic view of the internal structure of a dual-motor power assembly according to an embodiment of the present invention.

In the figure: 100. a power box body; 110. a gearbox; 120. a transfer case; 130. a power take-off box; 131. a front axle drive interface; 132. a rear axle drive interface; 140. assembling a reference surface; 160. an oil suction filter interface; 170. an oil filling hole; 180. an oil drain hole; 190. supporting feet; 210. a working device power unit; 211. the working device drives the motor; 212. a working power input shaft; 213. a working power drive gear; 214. a variable speed pump; 215. a working driven gear; 216. a working driven shaft; 217. a hydraulic pump PTO interface; 218. a transmission pump PTO interface; 220. a walking power unit; 221. a walking driving motor mounting interface; 222. a parking brake mount; 223. a travel driving motor; 224. a traveling power input mechanism; 224-1, a power input shaft; 224-2, a high gear drive gear; 224-3, a low gear drive gear; 225. a speed change and gear shift mechanism; 225-1, a gear shift shaft; 225-2, a high-speed driven gear; 225-3, low-gear driven gear; 225-4, high clutch; 225-5, low range clutch; 225-6, an output drive gear; 226. an operating valve mounting interface; 227. a shift operating valve; 228. a power take-off mechanism; 228-1, a walking power output shaft; 228-2, an output driven gear; 300. and a box cover.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 2, a power case for an electric wheeled construction machine, the power case 100 includes a transmission case 110 for mounting a walking power input mechanism 224 and a speed change gear shift mechanism 225, a set of opposite or adjacent sides of the transmission case are a vehicle assembly reference surface 140, the reference surface is designed to package the mounting accuracy of a power assembly, and at the same time, the mounting efficiency is improved, and a foundation is laid for quickly replacing an engine; a transfer case 120 for mounting a work implement power unit 210; and a power take-off box 130 for connecting a front axle and a rear axle of the construction vehicle; the transfer case 120 is located in the upper part of the gearbox; the pto case 130 is located at a lower portion of the transmission case; the gearbox, the transfer case and the power output case are in a communicated structure in the case body; the same side of the gearbox and the transfer case is of an open structure, and the case cover 300 is arranged on the open side of the open structure; a walking driving motor mounting interface 221 for mounting a walking driving motor is arranged on the gearbox; a parking brake mounting seat 222 for mounting a parking brake is arranged on the gearbox, and preferably, the parking brake mounting seat 222 is arranged at the opposite side of the drive motor mounting interface; a gear shifting control valve mounting interface 226 is arranged on the opposite side of the walking drive motor corresponding to the position of the speed changing and gear shifting mechanism; one side of the power output box 130 is provided with a front axle driving interface 131, and the other side is provided with a rear axle driving interface 132; the side surface of the power output box is also provided with an electric element mounting hole for mounting and detecting the rotating speed; the lower part of the power output box is provided with an oil absorption filter interface 160; an oil absorption filter is arranged on the oil absorption filter interface; the power output box is provided with an oil filling hole 170 and an oil drain hole 180; the oil drain hole is arranged at the bottom of the power output box; an oil level observation hole is also formed in the power output box; a hydraulic pump PTO interface 217 is arranged on the transfer case and is used for installing a hydraulic pump of a working device and a steering hydraulic pump, and a transmission pump PTO interface 218 is arranged below the hydraulic pump PTO;

the transfer case is arranged on the upper part for the purposes that: the position of the driving motor of the working device occupies the space position of the torque converter in the hydraulic transmission gearbox in the prior art; its equipment drive motor passes through the gear pair drive equipment hydraulic pump PTO device in the transfer case, the utility model discloses a position of equipment hydraulic pump PTO device is unanimous completely with the position of equipment hydraulic pump PTO device in the hydraulic transmission gearbox among the prior art, need not to do any adjustment to complete machine equipment and a steering system's pipeline arrangement, can realize the purpose of quick replacement.

The gearbox is arranged in the middle part; the gearbox of the utility model can realize high-low gear power gear shifting, the gearbox occupies a larger space position of the power assembly as a whole, and the position of the gearbox is consistent with the position of the existing hydraulic transmission gearbox; because the walking driving motor can realize positive and negative rotation, compared with the existing hydraulic transmission gearbox, the gearbox of the utility model does not need to be provided with a reverse gear mechanism, and only the speed change gear shifting mechanism and the power output mechanism connected with the speed change gear shifting mechanism are arranged in the gearbox, so that the mechanism is simpler and more compact; because a reverse gear mechanism is omitted, the cost is reduced on the basis of ensuring the function; meanwhile, fault risk points are reduced, and reliability is improved; in addition, compared with the traditional hydraulic transmission gearbox, the number of gear pairs is reduced, the transmission efficiency is improved, and the energy loss is reduced.

In the present embodiment, it is preferable that the power output case is provided at a lower portion thereof and is disposed diagonally to the transfer case, and the power output case is applied to an electric wheel type construction machine of an existing fuel engine, and the purpose thereof is: the power output device can output the power of the gearbox to a front driving axle and a rear driving axle of the vehicle; the space position of the power output device is consistent with that of a power output device in a hydraulic transmission gearbox in the prior art, so that the transmission shaft and a drive axle of the existing vehicle can be quickly replaced without any adjustment or change. The utility model discloses can use on the wheeled engineering machine tool of difference according to actual need, for example wheel loader, wheeled excavator, leveler, wheeled bull-dozer etc, transfer case and power take off case also can be for the symmetry setting (refer to and refer to figure 3) or for the homonymy setting (refer to figure 4) for the gearbox.

The walking driving motor and the working device driving motor are relatively arranged, and the walking driving motor and the working device driving motor have the advantages that: compared with the existing articulated frame electric wheel type engineering machinery, the articulated frame electric wheel type engineering machinery avoids the interference with a rear axle bag; the space above the hinged point of the front frame and the rear frame of the electric wheel type engineering machinery is fully utilized; meanwhile, the arrangement is beneficial to mounting, dismounting, maintaining and maintaining of the walking driving motor and the gearbox, and the problem that the existing double-motor electric wheel type engineering machinery is difficult to maintain in a transmission mode is solved.

To sum up, the utility model adopts the box body which is integrally arranged; two motors are integrally arranged on the same box body, wherein a working device driving motor respectively drives a working device hydraulic pump and a steering hydraulic pump through a transfer case, and can also drive a brake pump and a variable speed pump; the walking driving motor outputs power to the power driving device through the gearbox, and the power is transmitted to the front driving axle and the rear driving axle, so that the forward movement, the backward movement and the walking of the vehicle are realized; the utility model solves the defects that the single motor in the prior engineering machinery field which needs power walking and hydraulic power output has low driving efficiency and can not reasonably utilize electric energy; meanwhile, under the condition that the arrangement of the existing vehicle space, transmission parts such as a transmission shaft, a drive axle and the like and hydraulic pipelines is not changed, the double-motor integrated arrangement of the utility model can directly replace the existing engine, a torque converter and a hydraulic transmission gearbox which form a vehicle power assembly; the space of the original engine is emptied, and the engine can be used for arranging more power battery packs and electric control elements; simultaneously the utility model discloses the difficulty that the arrangement and the maintenance of prior art adoption bi-motor independent layout brought for the complete machine has still been solved.

Preferably, the opposite side of the case cover is provided with three PTO interfaces for the hydraulic pump on the transfer case; the upper left hydraulic pump PTO interface and the upper right hydraulic pump PTO interface are used for installing a hydraulic pump and a steering hydraulic pump of a working device, and the lower middle hydraulic pump PTO interface is a transmission pump PTO interface.

Preferably, at least two shaft holes are formed in the gearbox;

preferably, the bottom of the pto case is provided with support feet 137 for support and leveling.

Referring to fig. 5 and 6, a dual-motor power assembly includes a power box 100 and a power unit installed in the box; the power unit comprises a working device power unit 210 which is used for providing power input for driving the hydraulic pump to work by braking, steering and lubricating accessories when the electric loader works; and the walking power unit 220 is used for providing power input for the running, reversing and accelerating processes of the vehicle.

The working device power unit 210 includes a working device drive motor 211 connected to a working power input shaft 212 mounted in the transfer case, the working power input shaft having a working power drive gear 213 mounted thereon; a variable speed pump 214 is coaxially arranged on the working power input shaft at the outer side of the transfer case; the working power driving gear is connected with at least one working driven gear 215 through a gear pair, the working driven gear is arranged on a corresponding working driven shaft 216, and the working driven shaft is arranged on the transfer case through a support bearing;

a walking driving motor mounting interface 221 is arranged on the gearbox on the opposite side of the driving motor of the working device; a parking brake mounting seat 222 of the gearbox on the opposite side of the walking drive motor mounting interface is provided with a parking brake; parking brake is used for guaranteeing the security of vehicle under the parking condition, and parking brake theory of operation belongs to known technique, does not the utility model discloses a utility model point, do not give unnecessary details here.

The walking power unit 220 comprises a walking driving motor 223 mounted on the walking driving motor mounting interface; a walking power input mechanism 224 connected with the walking driving motor, wherein the walking power input mechanism is arranged on the upper layer of the gearbox; a speed change and gear shift mechanism 225 connected to the walking power input mechanism, the speed change and gear shift mechanism being disposed at a lower layer of the transmission case; a gear shift operating valve 227 is arranged on the gear shift operating valve mounting interface 226 corresponding to the opposite side of the gear shift mechanism position walking driving motor; a power take-off mechanism 228 coupled to the derailleur, the power take-off mechanism being disposed within the power take-off housing; the front axle driving interface 131 of the power output box is connected with the front axle through a transmission shaft to drive the front wheels of the vehicle to rotate: the rear axle driving interface 132 is connected with a rear axle through a transmission shaft to drive the rear wheels of the vehicle to rotate;

in this embodiment, the walking power input mechanism 224 is connected to the speed-changing and gear-shifting mechanism by a walking fixed-axis gear pair; the walking fixed-axis gear pair comprises a power input shaft 224-1 arranged at the upper part in the gearbox, and a high-speed driving gear 224-2 and a low-speed driving gear 224-3 are arranged on the power input shaft in the gearbox.

In this embodiment, the speed-changing and gear-shifting mechanism 225 adopts a speed-changing fixed-axis gear pair; the gear shift fixed-axis gear pair comprises a shift shaft 225-1, which is mounted in the gearbox by means of a support bearing; a high-speed driven gear 225-2 and a low-speed driven gear 225-3 which are mutually meshed with the high-speed driving gear 224-5 and the low-speed driving gear 224-6 are arranged on the gear shifting shaft, and a high-speed clutch 225-4 and a low-speed clutch 225-5 are arranged on the gear shifting shaft; a gear shift operating valve 227 used for controlling a high-gear clutch and a low-gear clutch to realize gear shifting is arranged at the end part of the gear shift shaft; the shift shaft is also provided with an output drive gear 225-6 connected to a power take-off 228.

The power output mechanism 228 comprises a walking power output shaft 228-1, the walking power output shaft is arranged in a power output box through bearing seats and bearings at two ends, and an output driven gear 228-2 meshed with an output driving gear of the speed change gear shifting mechanism is arranged on the walking power output shaft; and connecting flanges which are driven by a front axle and a rear axle are arranged at two ends of the power output shaft.

In the above technical solution, preferably, the walking power output shaft can be a through shaft; it is also possible to use split shafts, between which a clutch is connected. The preferred through-shaft design in this embodiment; for the wheel type engineering machinery needing to disconnect the front axle power, a split shaft structure can be adopted.

The application embodiment adopts the integrally arranged box body; two motors are integrally arranged on the same box body, wherein a working device driving motor respectively drives a working device hydraulic pump and a steering hydraulic pump through a transfer case, and can also drive a brake pump and a variable speed pump; the walking driving motor outputs power to the power driving device through the gearbox, and the power is transmitted to the front driving axle and the rear driving axle, so that the forward movement, the backward movement and the walking of the vehicle are realized; the utility model solves the defects that the single motor in the prior engineering machinery field which needs power walking and hydraulic power output has low driving efficiency and can not reasonably utilize electric energy; meanwhile, under the condition that the arrangement of the existing vehicle space, transmission parts such as a transmission shaft, a drive axle and the like and hydraulic pipelines is not changed, the double-motor integrated arrangement of the utility model can directly replace the existing engine, a torque converter and a hydraulic transmission gearbox which form a vehicle power assembly; the space of the original engine is emptied, and the engine can be used for arranging more power battery packs and electric control elements; simultaneously the utility model discloses the difficulty that the arrangement and the maintenance of prior art adoption bi-motor independent layout brought for the complete machine has still been solved.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides an electronic wheeled engineering machine power box for machine tool which characterized in that: the power box body comprises a gearbox, a power input mechanism and a speed change gear shifting mechanism, wherein the gearbox is used for mounting a walking power input mechanism and the speed change gear shifting mechanism; a transfer case for mounting a working device power unit; the power output box is used for installing the power output mechanism; the transfer case is positioned at the upper part of the gearbox; the power output box is positioned at the lower part of the gearbox; the gearbox, the transfer case and the power output case are in a communicated structure in the case body; the same side of the gearbox and the transfer case is of an open structure, and a case cover is arranged on the open side of the open structure; a hydraulic pump PTO interface is arranged on the transfer case on the opposite side of the case cover, and a transmission pump PTO interface is arranged below or above the hydraulic pump PTO; a walking driving motor mounting interface for mounting a walking driving motor is arranged on one side of the gearbox; a parking brake mounting seat for mounting a parking brake is arranged on the gearbox; a gear shifting control valve mounting interface is arranged on the gear box; one side of the power output box is provided with a front axle driving interface, and the other side of the power output box is provided with a rear axle driving interface.

2. The power box body for the electric wheeled construction machinery according to claim 1, wherein: the transfer case and the power output case are arranged diagonally relative to the gearbox or symmetrically or at the same side.

3. The power box body for the electric wheeled construction machinery according to claim 1, wherein: PTO interfaces for three hydraulic pumps are arranged on the transfer case on the opposite side of the case cover; the upper left hydraulic pump PTO interface and the upper right hydraulic pump PTO interface are used for installing a hydraulic pump and a steering hydraulic pump of a working device, and the lower middle hydraulic pump PTO interface is a transmission pump PTO interface.

4. The power box body for the electric wheeled construction machinery according to claim 3, wherein: two hydraulic pump PTO interfaces are arranged on the same horizontal central line; the transmission pump PTO interface is located on a vertical centerline between the two working device hydraulic pump PTO interfaces.

5. The power box body for the electric wheeled construction machinery according to claim 1, wherein: the walking drive motor mounting interface and the hydraulic pump PTO device interface on the transfer case are positioned on the same side or different sides.

6. The power box body for the electric wheeled construction machinery according to claim 1, wherein: at least two shaft holes are arranged in the gear box.

7. The power box body for the electric wheeled construction machinery according to claim 1, wherein: and the bottom of the power output box is provided with a supporting bottom foot.

8. The power box body for the electric wheeled construction machinery according to claim 1, wherein: the side surface of the power output box is also provided with an electric element mounting hole for mounting and detecting the rotating speed; the lower part of the power output box is provided with an oil absorption filter interface; an oil absorption filter is arranged on the oil absorption filter interface; the power output box is provided with an oil filling hole and an oil drain hole; the oil drain hole is arranged at the bottom of the power output box; an oil level observation hole is also arranged on the power output box.