Anti-explosion battery counterbalance type forklift truck

Abstract

This utility model discloses an explosion-proof battery-powered counterbalanced forklift. The drive system is fixed to the front of the frame; the lifting system is coaxially connected to the front crossbeam of the frame and equipped with forks; the rear wheel assembly is located at the rear of the frame and connected to the steering system via high-pressure hoses; the counterbalance unit is installed above the rear wheel assembly; the frame integrates an explosion-proof lead-acid battery, electrical system, and hydraulic piping system. The frame layout of this application includes the drive system, lifting system, rear wheel assembly, and counterbalance unit. The drive system uses explosion-proof traction motors on both left and right wheels for power output, allowing for coordinated torque distribution based on the load of the goods being transported. This enables the forklift to achieve a rated load capacity of up to 10 tons, breaking the 10-ton explosion-proof handling capacity barrier and filling a market gap.

Description

Technical Field

[0001] This utility model relates to the field of forklift equipment technology, specifically to an explosion-proof battery counterbalance forklift. Background Technology

[0002] In flammable and explosive hazardous locations such as petroleum, chemical, and textile industries, forklifts are needed to move large tonnage hazardous materials. However, existing explosion-proof battery counterbalance forklifts, with rated load capacities concentrated at 5 tons and below, cannot meet the needs of these locations for moving large tonnage goods. The main reason is that when the rated load capacity increases, explosion-proof technical challenges arise, such as changes in traction motor power, changes in oil pump motor power, a sharp increase in heat dissipation of the entire vehicle's electrical system, and insufficient braking capacity of the entire vehicle. Utility Model Content

[0003] The purpose of this invention is to provide an explosion-proof battery-powered counterbalanced forklift to solve the problem of poor performance of existing forklift equipment.

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] An explosion-proof battery counterbalance forklift includes a frame, a drive system, a lifting system, a rear wheel assembly, and a counterbalance unit.

[0006] The drive system is fixed to the front end of the vehicle frame and includes a left wheel reducer and a left wheel explosion-proof traction motor, a right wheel reducer and a right wheel explosion-proof traction motor, and four explosion-proof, anti-static solid tires.

[0007] The lifting system is coaxially connected to the front crossbeam of the chassis and is equipped with forks;

[0008] The rear wheel assembly is located at the rear of the vehicle frame and is connected to the steering system via a high-pressure hose.

[0009] The counterweight is mounted above the rear wheel assembly;

[0010] The vehicle frame integrates an explosion-proof lead-acid battery, an electrical system, and a hydraulic pipeline system, with the electrical system components encapsulated in an explosion-proof control box.

[0011] As a further embodiment of this utility model: the left wheel reducer and the left wheel explosion-proof traction motor are driven together, and the right wheel reducer and the right wheel explosion-proof traction motor are driven together, together forming a dual-motor drive structure for the forklift.

[0012] As a further aspect of this utility model, it also includes a temperature control system, which comprises an explosion-proof cooling fan and a temperature sensor electrically connected to the controller. The temperature control system is used to monitor the temperature of the explosion-proof traction motor of the left wheel assembly and the explosion-proof traction motor of the right wheel assembly in real time and control it to not exceed 135°C.

[0013] As a further aspect of this utility model, it also includes a braking system, which comprises an electronic parking brake system and a hydraulic power-assisted service brake system.

[0014] The electronic handbrake parking braking system is used for negative pressure braking forklifts, and the hydraulic power-assisted driving braking system is provided with hydraulic braking force by an explosion-proof brake motor and is equipped with an explosion-proof brake pressure sensor, an explosion-proof solenoid valve and a brake.

[0015] As a further embodiment of this utility model, the hydraulic power-assisted vehicle braking system is further provided with an accumulator for auxiliary braking.

[0016] As a further aspect of this utility model, it also includes an explosion-proof safe driving management system, comprising a posture-sensing explosion-proof sensor and an explosion-proof hydraulic system sensor.

[0017] As a further embodiment of this utility model: the hydraulic pipeline system connects explosion-proof oil pump motor one and explosion-proof oil pump motor two. Explosion-proof oil pump motor one is used to control the lifting and lowering of the lifting system, and explosion-proof oil pump motor two is used to control the tilting of the forks.

[0018] As a further embodiment of this utility model: the top of the vehicle frame is covered with an organic shell, a roof guard is installed at the front end of the vehicle frame to cover the cab, and the steering system and seat are fixed to the organic shell.

[0019] As a further embodiment of this invention: the explosion-proof lead-acid battery is encapsulated in a mold housing on a frame, and its control circuit is isolated from the external air.

[0020] As a further aspect of this utility model, the rated load capacity of the forklift is 10 tons.

[0021] The beneficial effects of this utility model are:

[0022] (1) The chassis layout of this application includes a drive system, a lifting system, a rear wheel assembly and a counterweight. The drive system is designed with explosion-proof traction motors for the left and right wheel sets to output power. The torque can be distributed in a coordinated manner according to the load of the goods being transported, so that the rated load capacity of the forklift in this application can reach 10 tons, thereby enabling the forklift equipment to break through the 10-ton explosion-proof handling capacity and fill the market gap.

[0023] (2) This application uses explosion-proof traction motors for left and right wheel sets, two sets of explosion-proof oil pump motors and explosion-proof brake motors in coordination, which can meet the usage requirements of forklift equipment under different working conditions.

[0024] (3) The temperature control system of this application can realize the safe use temperature control of the explosion-proof traction motor of the left and right wheel sets, and meet the core indicators of explosion-proof certification of traction motors.

[0025] (4) The braking system of this application adopts a combination of active braking of hydraulic braking and accumulator auxiliary braking, so that the braking distance of 10 tons full load is ≤7.5 meters, thereby ensuring braking safety. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] Figure 1 This is a schematic diagram of the structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the control principle of this utility model.

[0029] In the diagram: 1. Lifting system; 2. Overhead guard; 3. Steering system; 4. Seat; 5. Electrical system; 6. Counterweight; 7. Forks; 8. Drive system; 9. Braking system; 10. Frame; 11. Engine cover; 12. Hydraulic piping system; 13. Rear wheel assembly. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0031] In the description of this utility model, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; in the description of this utility model, "a plurality of" or "several" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] Please see Figure 1 and Figure 2As shown, this utility model is an explosion-proof battery-powered counterbalanced forklift, including a frame 10, a drive system 8, a lifting system 1, a rear wheel assembly 13, and a counterweight 6. The drive system 8 is fixed to the front end of the frame 10 and includes a left wheel reducer and a left wheel explosion-proof traction motor, a right wheel reducer and a right wheel explosion-proof traction motor, and four explosion-proof, anti-static solid tires. The lifting system 1 is coaxially connected to the front crossbeam of the frame 10 and is equipped with forks 7. The rear wheel assembly 13 is located at the rear end of the frame 10 and is connected to the steering system 3 via a high-pressure hose. The counterweight 6 is installed above the rear wheel assembly 13. The frame 10 integrates an explosion-proof lead-acid battery, an electrical system 5, and a hydraulic pipeline system 12, wherein the components of the electrical system 5 are encapsulated in an explosion-proof control box.

[0033] During the use of the forklift equipment of this application, the frame 10 is designed with a drive system 8, a lifting system 1, a rear wheel assembly 13 and a counterweight 6. The drive system 8 is designed with explosion-proof traction motors for the left and right wheel sets to output power. The torque can be coordinated and distributed according to the load of the goods being transported, so that the rated load capacity of the forklift of this application can reach 10 tons, thereby realizing the breakthrough of 10-ton explosion-proof handling capacity of forklift equipment and filling the market gap.

[0034] In the design of drive system 8, the left wheel group reducer and the left wheel group explosion-proof traction motor are connected, and the right wheel group reducer and the right wheel group explosion-proof traction motor are connected, together forming the dual-motor drive structure of the forklift. The output shaft of the left and right wheel group explosion-proof traction motors reduces the speed and torque through the reducer, and then transmits it to the four explosion-proof and anti-static solid tires through steering system 3, which solves the problem of insufficient power in existing explosion-proof forklifts.

[0035] The forklift equipment of this application also includes a temperature control system. The temperature control system includes an explosion-proof cooling fan and a temperature sensor electrically connected to the controller. The temperature control system is used to monitor the temperature of the explosion-proof traction motors of the left and right wheel sets in real time and control them to not exceed 135°C. PT100 temperature sensors can be embedded in the housings of the explosion-proof traction motors of the left and right wheel sets. When the temperature is >120°C, the explosion-proof cooling fan is activated to ensure that the temperature is ≤130°C. The real-time data from the temperature sensor is fed back to the controller via the CAN bus. The controller executes the following instructions: reduce the output power of the explosion-proof traction motors of the left and right wheel sets; activate the explosion-proof cooling fan to achieve safe operating temperature control of the explosion-proof traction motors of the left and right wheel sets.

[0036] The forklift equipment of this application also includes a braking system 9, which comprises an electronic parking brake system 9 and a hydraulic power-assisted driving brake system 9. The electronic parking brake system 9 is used for negative pressure braking of the forklift. The negative pressure braking of the electronic parking brake system 9 is a conventional handbrake operation and will not be described here. The hydraulic power-assisted driving brake system 9 is provided with hydraulic braking force by an explosion-proof brake motor and is equipped with an explosion-proof brake pressure sensor, an explosion-proof solenoid valve, and a brake. The hydraulic power-assisted driving brake system 9 also includes an accumulator for auxiliary braking. Since the forklift of this application can carry up to 10 tons of cargo, its braking distance and performance need to be improved. In this application, when the hydraulic power-assisted driving brake system 9 performs active braking, the explosion-proof brake motor can drive the hydraulic pump to generate 25MPa high-pressure oil, which is precisely distributed to the front and rear wheel brake cylinders via a proportional pressure regulating valve. When the hydraulic power-assisted driving brake system 9 performs auxiliary braking, the accumulator can store 20MPa pressure. When the hydraulic pump fails, the controller can automatically open the normally open solenoid valve to provide ≥3 emergency braking actions, thereby ensuring braking safety.

[0037] The forklift equipment of this application also includes an explosion-proof safe driving management system, which includes a seat posture sensing explosion-proof sensor and an explosion-proof hydraulic system sensor; the seat posture sensing explosion-proof sensor is used to monitor whether there is a driver in the seat of the forklift equipment of this application, and the explosion-proof hydraulic system sensor is used to monitor whether there is a leak in the oil line of the hydraulic pipeline system 12, so as to realize explosion-proof safe driving management.

[0038] The hydraulic pipeline system 12 of this application connects explosion-proof oil pump motor one and explosion-proof oil pump motor two. Explosion-proof oil pump motor one is used to control the lifting system 1 to lift and lower, and explosion-proof oil pump motor two is used to control the tilting of the forks 7. When the explosion-proof oil pump motor one is in use, it pumps hydraulic oil to the hydraulic cylinder of the lifting system 1, driving the piston rod of the hydraulic cylinder to extend and retract, thereby realizing the lifting and lowering operation of the goods. Explosion-proof oil pump motor two pumps hydraulic oil to the hydraulic cylinder of the tilting mechanism of the forks 7, driving the piston rod of the hydraulic cylinder to extend and retract, thereby realizing the tilting forward or backward operation of the forks 7. In the process, the hydraulic oil needs to be supplied through the hydraulic pipeline system 12.

[0039] The top of the frame 10 is covered by an organic cover 11. A roof guard 2 is installed at the front of the frame 10 to cover the cab. The steering system 3 and the seat 4 are fixed to the cover 11. The explosion-proof lead-acid battery is encapsulated in a mold housing on the frame, and its control circuit is isolated from the outside air.

[0040] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A counterbalanced forklift powered by an explosion-proof battery, characterized in that, It includes a frame (10), a drive system (8), a lifting system (1), a rear wheel assembly (13), and a counterweight unit (6); The drive system (8) is fixed to the front end of the frame (10) and includes a left wheel reducer and a left wheel explosion-proof traction motor, a right wheel reducer and a right wheel explosion-proof traction motor, and four explosion-proof and anti-static solid tires. The lifting system (1) is coaxially connected to the front crossbeam of the frame (10) and is equipped with forks (7); The rear wheel assembly (13) is located at the rear end of the frame (10) and is connected to the steering system (3) via a high-pressure hose; The counterweight (6) is mounted above the rear wheel assembly (13); The frame (10) integrates an explosion-proof lead-acid battery, an electrical system (5), and a hydraulic pipeline system (12), wherein the components of the electrical system (5) are encapsulated in an explosion-proof control box.

2. The explosion-proof battery-powered counterbalanced forklift according to claim 1, characterized in that, The left wheel reducer and the left wheel explosion-proof traction motor are connected, and the right wheel reducer and the right wheel explosion-proof traction motor are connected, together forming the dual-motor drive structure of the forklift.

3. The explosion-proof battery-powered counterbalanced forklift according to claim 1, characterized in that, It also includes a temperature control system, which includes an explosion-proof cooling fan and a temperature sensor electrically connected to the controller. The temperature control system is used to monitor the temperature of the explosion-proof traction motor of the left wheel assembly and the explosion-proof traction motor of the right wheel assembly in real time and control it to not exceed 135°C.

4. The explosion-proof battery-powered counterbalance forklift according to claim 1, characterized in that, It also includes a braking system (9), which comprises an electronic parking brake system (9) and a hydraulic power-assisted service brake system (9); The electronic handbrake parking braking system (9) is used for negative pressure braking of forklifts. The hydraulic power-assisted driving braking system (9) is provided with hydraulic braking force by an explosion-proof brake motor and is equipped with an explosion-proof brake pressure sensor, an explosion-proof solenoid valve and a brake.

5. The explosion-proof battery-powered counterbalanced forklift according to claim 4, characterized in that, The hydraulic power-assisted vehicle braking system (9) is equipped with an accumulator for auxiliary braking.

6. The explosion-proof battery-powered counterbalance forklift according to claim 1, characterized in that, It also includes an explosion-proof safe driving management system, which includes a posture-sensing explosion-proof sensor and an explosion-proof hydraulic system sensor.

7. The explosion-proof battery-powered counterbalanced forklift according to claim 1, characterized in that, The hydraulic pipeline system (12) connects explosion-proof oil pump motor one and explosion-proof oil pump motor two. Explosion-proof oil pump motor one is used to control the lifting system (1) to lift and lower, and explosion-proof oil pump motor two is used to control the tilting of the forks (7).

8. The explosion-proof battery-powered counterbalanced forklift according to claim 1, characterized in that, The top of the frame (10) is covered by an organic shell (11), and a roof guard (2) is installed at the front end of the frame (10) to cover the cab. The steering system (3) and the seat (4) are fixed to the organic shell (11).

9. The explosion-proof battery-powered counterbalance forklift according to claim 1, characterized in that, The explosion-proof lead-acid battery is encapsulated in a mold housing on the frame, and its control circuit is isolated from the outside air.

10. The explosion-proof battery-powered counterbalance forklift according to claim 1, characterized in that, The forklift has a rated load capacity of 10 tons.

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