CN210710613U - Electric forklift driving and hydraulic system - Google Patents
Electric forklift driving and hydraulic system Download PDFInfo
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- CN210710613U CN210710613U CN201921421752.XU CN201921421752U CN210710613U CN 210710613 U CN210710613 U CN 210710613U CN 201921421752 U CN201921421752 U CN 201921421752U CN 210710613 U CN210710613 U CN 210710613U
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Abstract
The utility model discloses an electric fork truck drive and hydraulic system, including fork truck control hydraulic system, fork truck work hydraulic system, fork truck actuating system, fork truck control hydraulic system with fork truck work hydraulic system arranges in parallel, fork truck control hydraulic system includes second hydraulic motor and the second hydraulic pump of being connected with the output shaft power of second hydraulic motor, fork truck work hydraulic system includes first hydraulic motor and the first hydraulic pump of being connected with the output shaft power of first hydraulic motor, this application through arranging two hydraulic system of mutually separating, can open corresponding pneumatic cylinder and hydraulic motor according to actual operating condition, therefore can avoid using the too big problem of energy consumption that single high-power hydraulic pump, hydraulic motor lead to; therefore, in the process of steering or braking, the hydraulic pipelines which are lifted and inclined cannot be shunted, and the influence of braking or steering on the working performance of the forklift is avoided.
Description
Technical Field
The utility model relates to a fork truck equipment technical field specifically is an electric fork truck drives and hydraulic system.
Background
Currently, four-wheel counter-balanced electric forklifts mainly have a single-drive front wheel and a double-drive front wheel, wherein the single-drive is more.
The single-drive forklift has a simple structure and low cost; the double-drive forklift is complex in structure and relatively high in cost. For a single-drive forklift, at present, hydraulic power-assisted steering is mainly adopted for steering, and steering hydraulic power of the single-drive forklift is derived from a shunting part of the hydraulic power for a loading and unloading device to work.
Meanwhile, the traction motor and the drive axle of the single-drive forklift are usually arranged in a traditional parallel mode or a T-shaped mode, the integration level is low, and the structural layout of the forklift is not facilitated.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an electric fork-lift drive and hydraulic system to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
an electric forklift driving and hydraulic system comprises a forklift control hydraulic system, a forklift working hydraulic system and a forklift driving system, wherein the forklift control hydraulic system and the forklift working hydraulic system are arranged in parallel;
the forklift control hydraulic system comprises a second hydraulic motor and a second hydraulic pump in power connection with an output shaft of the second hydraulic motor, and the second hydraulic pump is connected with a hydraulic braking unit and a steering gear;
the forklift working hydraulic system comprises a first hydraulic motor and a first hydraulic pump in power connection with an output shaft of the first hydraulic motor, and the first hydraulic pump is connected with a lifting oil cylinder and an inclined hydraulic cylinder;
the forklift driving system comprises a traction motor and a driving wheel coaxially arranged with the traction motor, and the driving wheel is in power connection with an output shaft of the traction motor.
As a further aspect of the present invention: the second hydraulic pump is a duplicate gear pump, and two oil outlets of the duplicate gear pump are respectively communicated with the hydraulic braking unit and the steering gear through pipelines.
As a further aspect of the present invention: the steering gear is connected with a steering hydraulic cylinder through a pipeline.
As a further aspect of the present invention: and a control valve for controlling the lifting hydraulic cylinder and the tilting hydraulic cylinder is arranged between the first hydraulic pump and the lifting hydraulic cylinder and between the first hydraulic pump and the tilting hydraulic cylinder.
As a further aspect of the present invention: the first hydraulic motor, the second hydraulic motor and the traction motor are connected with a storage battery.
As a further aspect of the present invention: the first hydraulic motor and the second hydraulic motor are three alternating current asynchronous motors, a second inverter is arranged between the first hydraulic motor and the storage battery, and a third inverter is arranged between the second hydraulic motor and the storage battery.
As a further aspect of the present invention: the traction motor is a three-phase alternating current asynchronous induction motor, and a first inverter is connected between the traction motor and the storage battery.
As a further aspect of the present invention: the traction motor is a double-output-end motor, and the two driving wheels are respectively in power connection with the output ends at the two ends of the traction motor through the left transmission unit and the right transmission unit.
As a further aspect of the present invention: the left transmission unit comprises a left wheel reduction gear, and the right transmission unit comprises a right wheel reduction gear, a differential and a brake.
As a further aspect of the present invention: both sides support through the transaxle between the drive wheel and connect, traction motor, left transmission unit, right transmission unit all fixed connection in the transaxle.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the driving structure with the single driving function is adopted, and the traction motor and the transmission mechanism are integrated in the drive axle of the integral structure, so that the structure is more compact, the occupied space is less, the forklift is easy to match with a forklift, and the mechanism layout of a forklift driving system is improved;
2. according to the hydraulic system, the two separated hydraulic systems are arranged to respectively provide high-pressure oil for braking, steering, lifting and inclining, and each hydraulic system is internally provided with the independent hydraulic pump and the independent hydraulic motor, so that in the using process, the corresponding hydraulic cylinder and the corresponding hydraulic motor can be started according to the actual working condition, and the problem of overlarge energy consumption caused by using a single high-power hydraulic pump and a single high-power hydraulic motor can be solved;
3. this application sets up two independent hydraulic system, provides high-pressure oil for braking, turn to and lift, slope respectively, because two hydraulic line are isolated each other, therefore turning to or the in-process of braking, can not cause the reposition of redundant personnel to the hydraulic line that lifts, slopes, avoided braking or turn to the influence to fork truck working property.
Drawings
FIG. 1 is a schematic view of the structure of the present embodiment;
in the figure: 1-driving wheel, 2-left transmission unit, 3-right transmission unit, 4-traction motor, 5-first hydraulic motor, 6-second hydraulic motor, 7-first inverter, 8-second inverter, 9-third inverter, 10-storage battery, 11-first hydraulic pump, 12-second hydraulic pump, 13-control valve, 14-hydraulic brake unit, 15-steering gear, 16-steering hydraulic cylinder, 17-lifting hydraulic cylinder and 18-tilting hydraulic cylinder.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, in an embodiment of the present invention, an electric forklift driving and hydraulic system includes a storage battery 10, the storage battery 10 is connected to a forklift control hydraulic system, a forklift working hydraulic system, and a forklift driving system, and the forklift control hydraulic system and the forklift working hydraulic system are arranged in parallel;
the forklift control hydraulic system comprises a third inverter 9 connected with a storage battery 10, the third inverter 9 is connected with a second hydraulic motor 6, the second hydraulic motor 6 is a three-phase alternating current asynchronous motor, a three-phase U pole, a three-phase V pole and a three-phase W pole on the second hydraulic motor 6 are respectively communicated with the U pole, the three-phase V pole and the three-phase W pole of the third inverter 9, further alternating current can be provided for the three-phase alternating current asynchronous motor through a direct current storage battery, an output shaft of the second hydraulic motor 6 is connected with a second hydraulic pump 12, the second hydraulic pump 12 is a duplicate gear pump, two oil outlets of the second hydraulic pump 12 are respectively connected with a hydraulic braking unit 14 and a steering gear 15 through pipelines, the steering gear 15 is connected with a steering hydraulic cylinder 16 through a pipeline, further the forklift braking can be controlled through the hydraulic braking unit 14;
the forklift working hydraulic system comprises a second inverter 8 connected with a storage battery 10, the second inverter 8 is connected with a first hydraulic motor 5, the first hydraulic motor 5 is a three-phase alternating current asynchronous motor, three-phase U poles, V poles and W poles on the first hydraulic motor 5 are respectively communicated with the U poles, V poles and W poles of the second inverter 8, furthermore, alternating current can be provided for the three-phase alternating current asynchronous motor through a direct current storage battery, the output end of the first hydraulic motor 5 is connected with a first hydraulic pump 11, the output end of the first hydraulic pump 11 is connected with a control valve 13 through a pipeline, the output end of the control valve 13 is connected with a lifting hydraulic cylinder 17 and a tilting hydraulic cylinder 18, so that the first hydraulic pump 11 can be driven by the first hydraulic motor 5 to provide high-pressure oil for the working hydraulic system of the forklift, the control valve 13 is used for controlling the on-off of the lifting hydraulic cylinder 17 and the tilting hydraulic cylinder 18, so that the working of the lifting hydraulic cylinder 17 and the tilting hydraulic cylinder 18 can be controlled;
the forklift driving system comprises a first inverter 7 communicated with a storage battery 10, the first inverter 7 is connected with a traction motor 4, the traction motor 4 is a three-phase alternating-current asynchronous induction motor, three-phase U poles, V poles and W poles on the traction motor 4 are respectively communicated with the U poles, V poles and W poles of the inverter 7, and further alternating current can be provided for the three-phase alternating-current asynchronous motor through a direct-current storage battery, the traction motor 4 is a double-output-end motor, the output ends of the two ends of the traction motor 4 are respectively connected with driving wheels 1 through a left transmission unit 2 and a right transmission unit 3, the driving wheels 1 on the two sides are coaxially arranged with the traction motor 4, the driving wheels 1 on the two sides are connected and supported through a driving axle, the left transmission unit 2 comprises a left wheel-side speed reducer, the right transmission unit 3 comprises a right wheel-side speed reducer, a differential and, The right transmission unit 3 is fixedly connected in the drive axle, so that an integrated drive axle is formed, and the traction motor 4 and the drive wheel 1 are coaxially arranged, so that the arrangement difficulty of a drive transmission system is reduced, the integration degree is higher, the occupied space is less, the transmission path is reduced, and the transmission efficiency and the transmission reliability are improved.
When the utility model is used, when the fork of the forklift needs to be lifted or inclined, the first hydraulic motor 5 is started, the first hydraulic pump 11 is driven by the first hydraulic motor 5, and then the lifting hydraulic cylinder 17 is driven by the first hydraulic pump 11, the inclined hydraulic cylinder 18 provides high-pressure oil, and then the on-off of a lifting oil way and an inclined oil way is controlled by the control valve 13, so that the lifting hydraulic cylinder 17 and the inclined hydraulic cylinder 18 can be controlled to lift or incline the fork; when steering or braking is needed, the second hydraulic motor 6 is started, the second hydraulic pump 12 is driven to rotate by the second hydraulic motor 6, and as the second hydraulic pump 12 is a duplicate gear pump and two high-pressure oil outlets of the duplicate gear pump are respectively communicated with the hydraulic braking unit 14 and the steering gear 15, high-pressure oil can be respectively provided for the hydraulic braking unit 14 and the steering gear 15 by the second hydraulic pump 12, so that a braking capability and a steering braking boosting function can be provided for the forklift; in this embodiment, because rise, the slope pipeline with the braking, the pipeline that turns to uses different motor and oil pump, therefore when fork truck turned to or the braking, can not to lifting, the high-pressure oil in the slope pipeline shunts, avoided fork truck to lift fork truck under braking or the steering operating mode, the influence of slope work, furthermore, in this application, because the operating mode is different, first hydraulic motor 5 adopts great powerful motor, the low-power motor of second motor material, can launch different motors according to the operating condition of difference, compare with traditional single motor, very big reduction energy consumption, economic performance has been increased.
In the running process of the forklift, the traction motor 4 drives the driving wheels 1 at the two sides to provide driving power for the forklift, because the traction motor is a three-phase alternating current asynchronous induction motor, when the forklift is in working states of speed reduction, braking and the like, at the moment, the power is not required to be output to the driving wheel through the traction motor 4, and simultaneously, the traction motor 4 can be driven to rotate through the driving wheel 1, furthermore, the traction motor 4 can be used as a generator, the energy generated by the deceleration of the forklift can be recycled, the energy recycled by the traction motor 4 is changed into regenerative electric energy which is returned to the storage battery 10 through the first inverter 7, if the first hydraulic motor 5 or the second hydraulic motor 6 is in an operating state at this time, the electric energy recovered by the traction motor 4 is preferably used by the first hydraulic motor 5 or the second hydraulic motor 6, and the redundant part is charged in the storage battery 10 for storing the storage battery 10.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. An electric forklift driving and hydraulic system comprises a forklift control hydraulic system, a forklift working hydraulic system and a forklift driving system, and is characterized in that the forklift control hydraulic system and the forklift working hydraulic system are arranged in parallel;
the forklift control hydraulic system comprises a second hydraulic motor (6) and a second hydraulic pump (12) in power connection with an output shaft of the second hydraulic motor (6), and the second hydraulic pump (12) is connected with a hydraulic brake unit (14) and a steering gear (15);
the forklift working hydraulic system comprises a first hydraulic motor (5) and a first hydraulic pump (11) in power connection with an output shaft of the first hydraulic motor (5), wherein the first hydraulic pump (11) is connected with a lifting hydraulic cylinder (17) and an inclination hydraulic cylinder (18);
the forklift driving system comprises a traction motor (4) and a driving wheel (1) coaxially arranged with the traction motor (4), and the driving wheel (1) is in power connection with an output shaft of the traction motor (4).
2. The electric fork lift driving and hydraulic system as recited in claim 1, characterized in that the second hydraulic pump (12) is a double gear pump, and two oil outlets of the double gear pump are respectively communicated with the hydraulic braking unit (14) and the steering gear (15) through pipelines.
3. An electric fork lift truck drive and hydraulic system as claimed in claim 1, characterized in that the steering gear (15) is connected by a line to a steering cylinder (16).
4. An electric fork lift truck drive and hydraulic system as claimed in claim 1, characterized in that a control valve (13) for controlling the lifting and tilting cylinders (17, 18) is arranged between the first hydraulic pump (11) and the lifting and tilting cylinders (17, 18).
5. An electric fork-lift truck driving and hydraulic system according to claim 1, characterized in that the first hydraulic motor (5), the second hydraulic motor (6) and the traction motor (4) are connected with a storage battery (10).
6. The electric forklift driving and hydraulic system according to claim 5, wherein the first hydraulic motor (5) and the second hydraulic motor (6) are three-phase AC asynchronous motors, a second inverter (8) is arranged between the first hydraulic motor (5) and the battery (10), and a third inverter (9) is arranged between the second hydraulic motor (6) and the battery (10).
7. An electric fork-lift truck driving and hydraulic system according to claim 5, characterized in that the traction motor (4) is a three-phase asynchronous induction motor, and a first inverter (7) is connected between the traction motor (4) and the accumulator (10).
8. An electric fork-lift truck driving and hydraulic system according to claim 1, characterized in that the traction motor (4) is a double-output motor, and the driving wheel (1) is provided with two and is respectively connected with the output ends of the two ends of the traction motor (4) through the left transmission unit (2) and the right transmission unit (3).
9. An electric fork-lift truck drive and hydraulic system according to claim 8, characterized in that the left transmission unit (2) comprises a left wheel reduction, and the right transmission unit (3) comprises a right wheel reduction, a differential and a brake.
10. The electric forklift driving and hydraulic system according to claim 1, wherein the driving wheels (1) on both sides are supported and connected by a driving axle, and the traction motor (4), the left transmission unit (2) and the right transmission unit (3) are all fixedly connected in the driving axle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921421752.XU CN210710613U (en) | 2019-08-29 | 2019-08-29 | Electric forklift driving and hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921421752.XU CN210710613U (en) | 2019-08-29 | 2019-08-29 | Electric forklift driving and hydraulic system |
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| Publication Number | Publication Date |
|---|---|
| CN210710613U true CN210710613U (en) | 2020-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921421752.XU Active CN210710613U (en) | 2019-08-29 | 2019-08-29 | Electric forklift driving and hydraulic system |
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| CN (1) | CN210710613U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110407136A (en) * | 2019-08-29 | 2019-11-05 | 安徽合力股份有限公司 | A kind of driving of electri forklift and hydraulic system |
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2019
- 2019-08-29 CN CN201921421752.XU patent/CN210710613U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110407136A (en) * | 2019-08-29 | 2019-11-05 | 安徽合力股份有限公司 | A kind of driving of electri forklift and hydraulic system |
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