CN110357005B - Electric fork truck driving system and electric fork truck - Google Patents

Electric fork truck driving system and electric fork truck Download PDF

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Publication number
CN110357005B
CN110357005B CN201910625781.6A CN201910625781A CN110357005B CN 110357005 B CN110357005 B CN 110357005B CN 201910625781 A CN201910625781 A CN 201910625781A CN 110357005 B CN110357005 B CN 110357005B
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Prior art keywords
plate
base
driving
sleeve
fixed
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CN201910625781.6A
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CN110357005A (en
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唐文
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B60L15/28—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed without contact making and breaking, e.g. using a transductor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/32—Control or regulation of multiple-unit electrically-propelled vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/07504—Accessories, e.g. for towing, charging, locking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/07572—Propulsion arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/07586—Suspension or mounting of wheels on chassis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks
    • B66F9/24—Electrical devices or systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00—Type of vehicles
    • B60L2200/40—Working vehicles
    • B60L2200/42—Fork lift trucks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2220/00—Electrical machine types; Structures or applications thereof
    • B60L2220/40—Electrical machine applications
    • B60L2220/42—Electrical machine applications with use of more than one motor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Power Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

The invention belongs to the technical field of vehicle manufacturing and control, and particularly relates to an electric forklift driving system and an electric forklift, wherein the driving system comprises a driving base and rollers arranged below the driving base, the upper part of the driving base is provided with a bearing structure for being connected with a forklift body of the electric forklift, the electric forklift driving system further comprises a first driving motor and a handle rod, the bottom end of the handle rod is provided with a resistance strain type pressure sensor, and the lower part of the resistance strain type pressure sensor is hinged on the driving base; after the handle rod is pulled, the tension is converted into an electric signal through a resistance strain type pressure sensor, and the output power of the first driving motor is controlled; according to the invention, by introducing the resistance strain type pressure sensor, the pulling force of a worker on the handle rod is converted into an electric signal for adjusting the output power of the first driving motor, so that the adjustment of the output power of the driving system in different movement stages of the electric forklift is realized, and the power utilization efficiency is improved.

Description

Electric fork truck driving system and electric fork truck
Technical Field
The invention belongs to the technical field of vehicle manufacturing and control, and particularly relates to an electric forklift driving system and an electric forklift.
Background
The electric forklift takes electricity as a power source, and the forklift is driven to walk by a driving motor, so that goods are transported from one place to another place. In the starting stage of forklift fork-carrying goods, the output power of the driving motor is maximum because of the need of overcoming larger static friction force; in the walking stage, the driving motor can keep smaller output power. The prior art controls this process through rotary switch, and in specific use, the user outputs the signal in order to control driving motor's output through manual control rotary switch's angle, and the operation of this kind of mode experiences and needs certain skill, has certain risk simultaneously, if electric fork truck is meeting when blocking or holding up the human body, if still rotate the handle at this moment and have the risk of striking.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides an electric forklift driving system which realizes simple control on forklift driving.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
The utility model provides an electric fork truck actuating system, includes drive base and sets up the gyro wheel in drive base below, drive base's upper portion is equipped with bearing structure and is used for linking to each other with electric fork truck's automobile body, still includes:
the first driving motor is arranged on the driving base, and an output shaft of the first driving motor is in transmission connection with the roller;
the lower part of the resistance strain type pressure sensor is hinged on the driving base, and the resistance strain type pressure sensor is electrically connected with the first driving motor;
After the handle rod is pulled, the tension is converted into an electric signal through the resistance strain type pressure sensor, and the output power of the first driving motor is controlled.
Preferably, the driving base comprises a base plate and side supporting plates extending downwards from two sides of the base plate, a connecting shaft is arranged at the center of the roller, and two ends of the connecting shaft are fixed on the side supporting plates through bearings.
Preferably, a first driven gear is arranged at one end of the connecting shaft, and the first driven gear is in transmission connection with a first driving gear arranged on the output shaft of the first driving motor through a chain.
Preferably, the electric forklift driving system further comprises a shield, the shield comprises a top cover plate and side cover plates with two sides and one end extending downwards, and the top cover plate is provided with a strip-shaped notch and is inserted and sleeved on the driving base.
The invention also provides an electric forklift, which is provided with the driving system.
The electric forklift comprises:
the vehicle body is provided with two forks which are arranged in parallel at intervals in a backward extending mode;
The pull rod assembly is arranged at the bottom of the fork and used for pushing and pulling driven wheels of the forklift to enable the fork to ascend or descend;
the lifting assembly is arranged at the front part of the vehicle body and is used for providing power for lifting or lowering the fork, and the lifting assembly comprises:
A base;
The ball screw is vertically arranged on the base, a sleeve is sleeved at the upper end of the ball screw, an arc-shaped plate is connected to the upper end of the sleeve, and the lower end of the arc-shaped plate is fixed on the vehicle body;
The second driving motor is arranged on the base and is used for providing power for the rotation of the ball screw;
a rocker arm rotatably disposed on the vehicle body; the rocker arm rod is provided with a transmission part, and the other end of the transmission part is hinged and fixed with the pull rod assembly;
one end of the rocker arm plate is fixed below the base, and the other end of the rocker arm plate is fixed on the rocker arm rod;
The sleeve is provided with an annular convex part, a blocking piece is sleeved above the annular convex part, and the ball screw drives the sleeve to move so that the annular convex part of the sleeve abuts against the blocking piece and pushes and pulls the vehicle body to move up and down.
Preferably, the base comprises a bottom plate and side plates arranged on two sides of the bottom plate, a top plate is fixed above the side plates on two sides, a shaft of the ball screw penetrates through the top plate, and a second driven gear which is coaxially arranged is arranged at the lower end of the ball screw;
and a second driving gear is fixed on an output shaft of the second driving motor and is in transmission connection with the second driven gear.
Preferably, the lifting assembly further comprises a locking mechanism,
The locking mechanism includes:
The mounting plate is fixed on the top plate and is provided with an electromagnet;
the guide rod is arranged on the mounting plate in a penetrating way;
The moving plate is fixed at the end part of the guide rod, and a spring is sleeved on the guide rod body between the moving plate and the mounting plate;
The movable plate is provided with a downward extending pin rod, the electromagnet is electrified to attract the movable plate to move towards the side where the mounting plate is located, the pin rod is driven to move to the position between teeth of the second driven gear, or the spring force of the spring drives the movable plate to move to enable the rod body of the pin rod to leave the position between teeth of the second driven gear after the electromagnet is powered off.
Preferably, the pull rod assembly includes:
The pull rod is arranged in an extending manner along the length direction of the fork;
the middle part of the hinged plate is hinged and fixed at the bottom of the fork, the upper end of the hinged plate is hinged and fixed with the end part of the pull rod, and the lower end of the hinged plate is hinged and connected with the retainer of the driven wheel.
Preferably, the blocking piece is an annular baffle plate, and bolts are arranged on the annular baffle plate and are fixedly connected to the base in a penetrating way;
the sleeve is formed by combining a first sleeve with a flange and a second sleeve with flanges, and flange ends of the first sleeve and the second sleeve are adjacently butted;
And the upper end of the second sleeve is provided with a cross rod, and two ends of the cross rod are fixedly connected with the arc plates on two sides respectively.
Compared with the prior art, the invention has the following technical effects:
According to the electric forklift driving system, the resistance strain type pressure sensor is introduced, so that the pulling force of a worker on the handle rod is converted into the electric signal for adjusting the output power of the first driving motor, the adjustment of the output power of the driving system in different movement stages of the electric forklift is realized, the operation experience of a person is improved, the movement of the controlled forklift is more in line with the habit of the person, meanwhile, the safety is improved, and the situation that the forklift is still accelerated when the forklift needs to be decelerated or stopped is avoided.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
Fig. 1 is an exploded schematic view of an electric forklift driving system provided by the invention;
fig. 2 is a schematic diagram of an electric forklift provided by the invention;
fig. 3 is a schematic view of a lifting assembly in an electric forklift provided by the present invention;
FIG. 4 is a schematic view of the ball screw and sleeve of FIG. 3 mated;
The reference numerals in the figures illustrate: 1-car body, 2-fork, 3-driven wheel, 10-driving base, 101-roller, 11-first driving motor, 111-first driving gear, 12-handle bar, 13-resistance strain pressure sensor, 14-base plate, 141-side stay, 15-connecting shaft, 151-first driven gear, 20-shield, 21-top cover plate, 22-side cover plate, 23-bar notch, 30-base, 301-bottom plate, 302-side plate, 303-top plate, 31-ball screw, 311-second driven gear, 32-second driving motor, 321-second driving gear, 40-sleeve, 401-first sleeve, 402-second sleeve, 41-arc plate, 42-annular protrusion, 43-cross bar, 50-rocker arm, 51-transmission piece, 52-rocker arm plate, 60-stopper, 61-bolt, 70-mounting plate, 71-guide bar, 72-moving plate, 73-pin bar, 80-pull rod, 81-hinge plate.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the present invention easy to understand, the present invention is further explained below with reference to the specific drawings.
It will be understood that when an element is referred to as being "fixed to" another element in this disclosure, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 and 2, the invention provides an electric forklift driving system, which comprises a driving base 10 and a roller 101 arranged below the driving base 10, wherein the upper part of the driving base 10 is provided with a bearing structure for being connected with a forklift body 1, the driving system also comprises a first driving motor 11 and a handle rod 12, the first driving motor 11 is arranged on the driving base 10, and an output shaft of the first driving motor is in transmission connection with the roller 101; the bottom end of the handle rod 12 is provided with a resistance strain type pressure sensor 13, the lower part of the resistance strain type pressure sensor 13 is hinged on the driving base 10, and the resistance strain type pressure sensor 13 is electrically connected with the first driving motor 11; after the handle rod 12 is pulled, the pulling force is converted into an electric signal by the resistance strain type pressure sensor 13, and the output power of the first driving motor 11 is controlled.
The resistance strain type pressure sensor 13 in the invention is based on the principle that the resistance of a resistance strain gauge changes when the resistance strain gauge deforms, and mainly comprises an elastic element, a resistance strain gauge, a measuring circuit and a transmission cable, wherein the elastic element is connected with the handle rod 12, so that the tension given to the handle rod 12 by a worker is converted into a changed resistance, and the measuring circuit measures the change of the resistance of the strain gauge and converts the change into an electric signal which is in direct proportion to the tension to output, so as to adjust the output power of the first driving motor 11; specifically, the driving system is further configured with a motor controller for receiving an electrical signal from the resistance strain type pressure sensor 13, and correspondingly controlling the output power of the first driving motor 11 according to the electrical signal, which is common knowledge in the art, and the present invention is not described herein.
By adding the resistance strain type pressure sensor 13 in the driving system, human intervention is added to the output power of the first driving motor 11, so that the output power of the first driving motor 11 is correspondingly adjusted in the starting stage and the advancing stage of the electric forklift, the power output is optimized, and the power utilization efficiency is improved.
Further, according to the present invention, the driving base 10 includes a base plate 14 and side supporting plates 141 extending downward from two sides of the base plate 14, a connecting shaft 15 is disposed at the center of the roller 101, and two ends of the connecting shaft 15 are fixed on the side supporting plates 141 via bearings.
Further, a first driven gear 151 is disposed at one end of the connecting shaft 15, and the first driven gear 151 is connected to a first driving gear 111 disposed on an output shaft of the first driving motor 11 through a chain transmission.
In the present invention, the electric forklift driving system further comprises a shroud 20, the shroud 20 comprises a top cover plate 21 and side cover plates 22 with two sides and one end extending downwards of the top cover plate 21, and the top cover plate 21 is provided with a strip-shaped notch 23 and is inserted and sleeved on the driving base 10.
As shown in fig. 3 and 4, the invention further provides an electric forklift with the driving system. The electric forklift comprises a forklift body 1, a pull rod assembly and a lifting assembly; the forklift comprises a forklift body 1, a pull rod assembly and a fork assembly, wherein the forklift body 1 is backwards extended to form two forks 2 which are arranged in parallel at intervals, and the pull rod assembly is arranged at the bottom of the forks 2 and is used for pushing and pulling driven wheels 3 of the forklift to enable the forks 2 to ascend or descend; the lifting assembly is arranged at the front part of the vehicle body 1 and is used for providing power for lifting or lowering the fork 2.
The lifting assembly comprises a base 30, a ball screw 31, a second driving motor 32, a rocker arm lever 50 and a rocker arm plate 52; the ball screw 31 is vertically arranged on the base 30, a sleeve 40 is sleeved at the upper end of the ball screw 31, an arc-shaped plate 41 is connected to the upper end of the sleeve 40, and the lower end of the arc-shaped plate 41 is fixed on the vehicle body 1;
The second driving motor 32 is disposed on the base 30, and is configured to provide power for rotating the ball screw 31; a rocker arm 50 is rotatably disposed on the vehicle body 1; the rocker arm 50 is provided with a transmission piece 51, and the other end of the transmission piece 51 is hinged and fixed with the pull rod assembly; one end of a rocker arm plate 52 is fixed below the base 30, and the other end is fixed on the rocker arm 50; the sleeve 40 is provided with an annular convex part 42, a blocking piece 60 is sleeved above the annular convex part 42, and the ball screw 31 drives the sleeve 40 to move so that the annular convex part 42 abuts against the blocking piece 60 and pushes and pulls the vehicle body 1 to move up and down.
In a specific working process, the second driving motor 32 drives the ball screw 31 to rotate clockwise, the ball screw 31 drives the sleeve 40 to move upwards along the length direction of the rod, after the annular convex part 42 moving to the sleeve 40 is abutted against the blocking piece 60, the arc-shaped plate 41 and the vehicle body 1 connected with the arc-shaped plate are further pushed to move upwards, and then the driven wheel 3 is dragged by the pull rod assembly, so that the fork 2 is lifted; when goods need to be put down, the second driving motor 32 drives the ball screw 31 to rotate anticlockwise, the ball screw 31 drives the sleeve 40 to move downwards along the length direction of the sleeve, the arc plate 41 and the car body 1 connected with the arc plate are further pulled to move downwards, and the driven wheel 3 is pushed by the pull rod assembly, so that the fork 2 descends.
Further, according to the present invention, the base 30 includes a bottom plate 301 and side plates 302 disposed on two sides of the bottom plate 301, a top plate 303 is fixed above the side plates 302 on two sides, the shaft of the ball screw 31 passes through the top plate 303, and a second driven gear 311 disposed with a coaxial core is disposed at the lower end of the ball screw 31;
The output shaft of the second driving motor 32 is fixed with a second driving gear 321, and the second driving gear 321 is in transmission connection with the second driven gear 311.
In the invention, the lifting assembly further comprises a locking mechanism, wherein the locking mechanism comprises a mounting plate 70, a guide rod 71 and a moving plate 72, the mounting plate 70 is fixed on the top plate 303, and an electromagnet is arranged on the mounting plate 70; the guide rod 71 is arranged on the mounting plate 70 in a penetrating way, the moving plate 72 is fixed at the end part of the guide rod 71, and a spring is sleeved on the rod body of the guide rod 71 between the moving plate 72 and the mounting plate 70; the moving plate 72 is provided with a pin 73 extending downwards, and the moving plate 72 is attracted to move towards the side of the mounting plate 70 after the electromagnet is electrified, and drives the pin 73 to move to the teeth of the second driven gear 311, or the spring force of the spring drives the moving plate 72 to move to leave the shaft of the pin 73 from the teeth of the second driven gear 311 after the electromagnet is powered off.
In order that the moving plate 72 may be attracted by the electromagnet when energized, the moving plate 72 may be made of a ferrous material or an iron sheet may be fixed to the moving plate 72.
In a specific operation process, when the fork 2 needs to be lifted or lowered, the electromagnet arranged on the mounting plate 70 is powered off, the spring force of the spring drives the pin 73 to leave the teeth of the second driven gear 311, when the fork 2 moves to a required position, the electromagnet is powered on, and the moving plate 72 is attracted to enable the pin 73 to be inserted between the teeth of the second driven gear 311 so as to complete braking, and at the moment, the spring is in a compressed state.
In the invention, the pull rod assembly comprises a pull rod 80 and a hinged plate 81, wherein the pull rod 80 is arranged in an extending way along the length direction of the fork 2; the middle part of the hinged plate 81 is hinged and fixed at the bottom of the pallet fork 2, the upper end of the hinged plate is hinged and fixed with the end part of the pull rod 80, and the lower end of the hinged plate is hinged and connected with the retainer of the driven wheel 3.
In the present invention, the blocking member 60 is an annular baffle plate, and bolts 61 are arranged on the annular baffle plate and are fixedly connected to the base in a penetrating manner;
The sleeve 40 is formed by combining a first sleeve 401 and a second sleeve 402 which are provided with flanges, and flange ends of the first sleeve 401 and the second sleeve 402 are adjacently butted; the flanged ends of the first sleeve 401 and the second sleeve 402 combine to form an annular protrusion 42;
The upper end of the second sleeve 402 is provided with a cross bar 43, and two ends of the cross bar 43 are fixedly connected with the arc plates 41 on two sides respectively.
The foregoing has outlined and described the basic principles, main features and features of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (7)

1. The utility model provides an electric fork truck actuating system, includes drive base (10) and sets up gyro wheel (101) in drive base (10) below, the upper portion of drive base (10) is equipped with bearing structure and is used for linking to each other with electric fork truck's automobile body (1), its characterized in that still includes:
the first driving motor (11) is arranged on the driving base (10), and an output shaft of the first driving motor (11) is in transmission connection with the roller (101);
The bottom end of the handle rod (12) is provided with a resistance strain type pressure sensor (13), the lower part of the resistance strain type pressure sensor (13) is hinged on the driving base (10), and the resistance strain type pressure sensor (13) is electrically connected with the first driving motor (11);
the handle rod (12) is pulled, and then the pulling force is converted into an electric signal through the resistance strain type pressure sensor (13) and the output power of the first driving motor (11) is controlled;
The driving base (10) comprises a base plate (14) and side supporting plates (141) extending downwards from two sides of the base plate (14), a connecting shaft (15) is arranged at the center of the roller (101), and two ends of the connecting shaft (15) are fixed on the side supporting plates (141) through bearings;
One end of the connecting shaft (15) is provided with a first driven gear (151), and the first driven gear (151) is in transmission connection with a first driving gear (111) arranged on an output shaft of the first driving motor (11) through a chain;
The novel driving base is characterized by further comprising a shield (20), wherein the shield (20) comprises a top cover plate (21) and side cover plates (22) with two sides and one end extending downwards of the top cover plate (21), and the top cover plate (21) is provided with a strip-shaped notch (23) and is inserted and sleeved on the driving base (10).
2. An electric forklift having the electric forklift drive system of claim 1.
3. The electric forklift of claim 2, wherein said electric forklift comprises:
The vehicle comprises a vehicle body (1), wherein the vehicle body (1) is backwards extended with two forks (2) which are arranged in parallel at intervals;
The pull rod assembly is arranged at the bottom of the fork (2) and is used for pushing and pulling a driven wheel (3) of the forklift to enable the fork (2) to ascend or descend;
the lifting assembly is arranged at the front part of the vehicle body (1) and is used for providing power for lifting or lowering the fork (2), and the lifting assembly comprises:
a base (30);
The ball screw (31) is vertically arranged on the base (30), a sleeve (40) is sleeved at the upper end of the ball screw (31), an arc-shaped plate (41) is connected to the upper end of the sleeve (40), and the lower end of the arc-shaped plate (41) is fixed on the vehicle body (1);
A second driving motor (32) arranged on the base (30) and used for providing power for the rotation of the ball screw (31);
A rocker arm (50) rotatably disposed on the vehicle body (1); the rocker arm lever (50) is provided with a transmission piece (51), and the other end of the transmission piece (51) is hinged and fixed with the pull rod assembly;
A rocker arm plate (52) having one end fixed to the lower part of the base (30) and the other end fixed to the rocker arm lever (50);
Wherein, the sleeve (40) is provided with an annular convex part (42), a blocking piece (60) is sleeved above the annular convex part (42), and the ball screw (31) drives the sleeve (40) to move so that the annular convex part (42) is abutted against the blocking piece (60) and pushes and pulls the vehicle body (1) to move up and down.
4. An electric forklift as claimed in claim 3, wherein the base (30) comprises a bottom plate (301) and side plates (302) arranged at both sides of the bottom plate (301), a top plate (303) is fixed above the side plates (302) at both sides, the shaft of the ball screw (31) passes through the top plate (303) and a second driven gear (311) arranged with a coaxial core is arranged at the lower end of the ball screw (31);
and a second driving gear (321) is fixed on an output shaft of the second driving motor (32), and the second driving gear (321) is in transmission connection with the second driven gear (311).
5. The electric fork-lift truck of claim 4, wherein the lift assembly further comprises a locking mechanism,
The locking mechanism includes:
the mounting plate (70) is fixed on the top plate (303), and an electromagnet is arranged on the mounting plate (70);
A guide rod (71) which is arranged on the mounting plate (70) in a penetrating way;
A moving plate (72) fixed at the end part of the guide rod (71), wherein a spring is sleeved on the rod body of the guide rod (71) between the moving plate (72) and the mounting plate (70);
The moving plate (72) is provided with a pin rod (73) extending downwards, the moving plate (72) is attracted to move towards the side where the mounting plate (70) is located after the electromagnet is electrified, the pin rod (73) is driven to move to the tooth space of the second driven gear (311), or the elastic force of the spring drives the moving plate (72) to move after the electromagnet is powered off, so that the rod body of the pin rod (73) is separated from the tooth space of the second driven gear (311).
6. The electric fork lift truck of claim 5, wherein the drawbar assembly comprises:
A pull rod (80) extending along the length direction of the fork (2);
the middle part of the hinged plate (81) is hinged and fixed at the bottom of the fork (2), the upper end of the hinged plate is hinged and fixed with the end part of the pull rod (80), and the lower end of the hinged plate is hinged and connected with the retainer of the driven wheel (3).
7. The electric fork-lift truck of claim 6, wherein the blocking member (60) is an annular baffle plate, and the annular baffle plate is provided with bolts (61) and is fixedly connected to the base in a penetrating manner;
The sleeve (40) is formed by combining a first sleeve (401) with a flange and a second sleeve (402), and flange ends of the first sleeve (401) and the second sleeve (402) are adjacently butted;
the upper end of the second sleeve (402) is provided with a cross rod (43), and two ends of the cross rod (43) are fixedly connected with the arc plates (41) on two sides respectively.
CN201910625781.6A 2019-07-11 2019-07-11 Electric fork truck driving system and electric fork truck Active CN110357005B (en)

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CN214383679U (en) * 2021-01-21 2021-10-12 浙江金华文瑞机电有限公司 Force sensing speed control handle
CN112919370B (en) * 2021-02-03 2024-06-04 浙江加力仓储设备股份有限公司 Walking type electric carrier

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CN210366865U (en) * 2019-07-11 2020-04-21 唐文 Electric forklift driving system and electric forklift

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CN106185722A (en) * 2016-07-14 2016-12-07 安徽宇锋仓储设备有限公司 Electricity turns to forklift
CN207046784U (en) * 2017-06-28 2018-02-27 深圳市海泰联合供应链有限公司 A kind of adjusting means of hand fork lifter
CN108455488A (en) * 2018-03-26 2018-08-28 嘉兴博途物流设备有限公司 A kind of multifunctional small-size hydraulic propping jiggering
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