Pure electric shear fork type overhead working truck

Abstract

The utility model provides a pure electric shear fork type overhead working truck which comprises a movable chassis, a shear fork type lifting frame, a working platform, a controller, a lifting electric cylinder, a traveling driving motor and an electric steering mechanism, the shear fork type lifting frame is arranged on the movable chassis, and the working platform is arranged on the shear fork type lifting frame. Two traveling driving wheels are arranged at one end of the movable chassis, the lifting electric cylinder is arranged on the scissor-type lifting frame, the lifting motion of the scissor-type lifting frame can be achieved through telescopic operation of the lifting electric cylinder, and each traveling driving wheel is driven to rotate through a traveling driving motor. And the electric steering mechanism can realize steering driving of the two driving wheels. According to the overhead working truck, the electric cylinder serves as a lifting and steering execution element, an execution mechanism of the overhead working truck is simple and convenient to maintain, meanwhile, the control accuracy of the electric cylinder is higher than that of a hydraulic oil cylinder, and therefore the lifting and steering accuracy can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mobile lifting platforms, and particularly to a pure electric scissor lift truck. Background Art

[0002] A scissor lift truck is a vehicle that can lift up and down for operation by controlling multiple hydraulic cylinders through a hydraulic or electric system. It gets its name from its scissor mechanical structure, which makes the lifting of the lifting platform have high stability. Scissor lift trucks are widely used in high-altitude operations in industries such as urban construction, oil fields, transportation, municipal administration, and factory areas. It can replace traditional manual climbing operation methods such as ladders, improving operation efficiency and safety.

[0003] Since the hydraulic cylinder needs to rely on a complete hydraulic system to work, when using the hydraulic cylinder as the lifting and steering actuator, a set of hydraulic system must be matched, which in turn leads to a more complex execution structure of the existing scissor lift truck, and there is a problem of oil leakage after long-term use, making daily maintenance more cumbersome. Content of the Utility Model

[0004] The purpose of the utility model is to provide a pure electric scissor lift truck. The lift truck uses electric cylinders as the lifting and steering actuators, making the execution mechanism of the lift truck simple and more convenient to maintain. At the same time, the control accuracy of the electric cylinder is higher than that of the hydraulic cylinder, thereby improving the lifting and steering accuracy.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a pure electric scissor lift truck, including a mobile chassis, a scissor lift, a working platform, a controller, a lifting electric cylinder, a driving motor for traveling, and an electric steering mechanism. The scissor lift is arranged on the mobile chassis, the working platform is arranged on the scissor lift. At one end of the mobile chassis, two driving wheels for traveling are arranged. The lifting electric cylinder is arranged on the scissor lift. The telescopic operation of the lifting electric cylinder can realize the lifting movement of the scissor lift. Each driving wheel for traveling is rotationally driven by a driving motor for traveling, and the electric steering mechanism can realize the steering drive of the two driving wheels for traveling.

[0006] Preferably, at one end of the frame of the mobile chassis, two vertically arranged vertical sleeves are fixedly arranged. A rotatable steering support shaft is sleeved in each vertical sleeve. A traveling steering bracket is arranged at the bottom of the steering support shaft. The driving motor for traveling is arranged on the traveling steering bracket. The driving wheel for traveling is connected to the power output end of the corresponding driving motor for traveling.

[0007] Further, the electric steering mechanism includes a steering electric cylinder and a steering link. Both ends of the steering link are respectively hinged to the upper part of the corresponding walking steering bracket. The telescopic end of the steering electric cylinder is hinged to one end of the steering link, and the other end of the steering electric cylinder is hinged to the mobile chassis.

[0008] Further, a left steering limit photoelectric detection switch and a right steering limit photoelectric detection switch are arranged at one end of the mobile chassis. The left steering limit photoelectric detection switch is located at the upper front side of one of the walking steering brackets, and the right steering limit photoelectric detection switch is located at the upper front side of the other walking steering bracket. The controller is electrically connected to both the left steering limit photoelectric detection switch and the right steering limit photoelectric detection switch.

[0009] Further, an inclination sensor is arranged on the upper part of the mobile chassis, and the inclination sensor is electrically connected to the controller.

[0010] Further, the scissor lift includes a first X-shaped component, a second X-shaped component, a third X-shaped component, and a fourth X-shaped component. The first X-shaped component, the second X-shaped component, the third X-shaped component, and the fourth X-shaped component are successively hinged end to end from low to high. The lower left part of the first X-shaped component is hinged to the upper part of the mobile chassis, and the lower right part of the first X-shaped component is slidably connected to the mobile chassis. The fixed end of the lifting electric cylinder is hinged to the upper right part of the right side of the first X-shaped component, and the telescopic end of the lifting electric cylinder is hinged to the lower left part of the third X-shaped component. A lower limit detection plate is fixedly arranged at the upper right position near the lower left part of the first X-shaped component. A lower limit travel switch corresponding to the lower limit detection plate is arranged on the mobile chassis. An upper limit travel switch corresponding to the moving slider at the lower right part of the first X-shaped component is arranged on the mobile chassis. Both the lower limit travel switch and the upper limit travel switch are electrically connected to the controller.

[0011] The beneficial effects of the present utility model are as follows: The structure of the walking and lifting execution mechanism of the present utility model is simpler than the corresponding hydraulic power system structure, and there is no problem of pipeline oil leakage, which is convenient for daily maintenance work; The lifting electric cylinder, the steering electric cylinder, and the driving wheels are all driven by motors, and the energy utilization rate is high, which is beneficial to saving the use cost in the long term; Further, the control precision of the lifting electric cylinder, the steering electric cylinder, and the driving motor is high, which is beneficial to realizing the precision of lifting, steering, and driving; The left steering limit photoelectric detection switch, the right steering limit photoelectric detection switch, the inclination sensor, the lower limit travel switch, and the upper limit travel switch directly participate in the operation control process of the aerial work vehicle, thereby improving the use reliability of the aerial work vehicle. Description of the Drawings

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some preferred embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 It is the front view of the partial structure of the present invention;

[0015] Figure 3 It is a schematic connection diagram of the electric steering mechanism and the walking steering bracket;

[0016] Figure 4 It is the side view of the mobile chassis;

[0017] Figure 5 For Figure 1 The enlarged view at position A in

[0018] Figure 6 For Figure 1 The enlarged view at position B in

[0019] Figure 7 For Figure 4 The enlarged view at position C in

[0020] In the figure: 1 mobile chassis, 11 driving driving wheel, 12 walking steering bracket, 121 steering support shaft, 13 vertical sleeve, 14 hinge seat, 15 support plate, 16 driving driven wheel, 2 scissor lift, 21 first X-shaped component, 211 support rod, 212 lower limit detection plate, 213 moving slider, 3 operation platform, 4 lifting electric cylinder, 5 driving motor, 61 steering electric cylinder, 62 steering connecting rod, 101 left steering limit photoelectric detection switch, 102 right steering limit photoelectric detection switch, 103 inclination sensor, 104 lower limit travel switch, 105 upper limit travel switch. Specific embodiments

[0021] The following will combine specific embodiments and the attached Figures 1-7 , and clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some preferred embodiments of the present invention, rather than all embodiments. Those skilled in the art can make similar deformations without violating the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0022] The utility model provides a pure electric scissor lift truck (as shown in Figure 1 ), which includes a mobile chassis 1, a scissor lift 2, a working platform 3, a controller, a lifting electric cylinder 4, a driving motor 5 for travel, and an electric steering mechanism. The mobile chassis 1 is a component of the existing structure of the scissor lift truck, and it is mainly used to achieve the overall load bearing of the work truck. The scissor lift 2 is arranged on the mobile chassis 1, and the working platform 3 is arranged on the scissor lift 2. The scissor lift 2 is also a component of the existing structure of the existing scissor lift, and it can perform telescopic movement to realize the lifting and supporting movement of the working platform 3. At one end of the mobile chassis 1, two driving wheels 11 for travel are arranged. In practical applications, the two driving wheels 11 for travel are arranged side by side front and rear at the lower right end of the mobile chassis 1. At the lower left end of the mobile chassis 1, two driven wheels 16 for travel are arranged front and rear. Driven by the rotation of the two driving wheels 11 for travel, the mobile chassis 1 can move forward. The lifting electric cylinder 4 is arranged on the scissor lift 2. The telescopic operation of the lifting electric cylinder 4 can realize the lifting movement of the scissor lift 2. The lifting movement of the scissor lift 2 realizes the up and down lifting of the working platform 3 above it. Because the structure of the lifting electric cylinder 4 is simple, the structure of the lifting actuator is greatly simplified, which is convenient for the processing and manufacturing of the aerial work truck. Each driving wheel 11 for travel is rotationally driven by a driving motor 5 for travel. The driving motor 5 for travel has a simple structure and is convenient to install, thus greatly simplifying the drive actuator of the aerial work truck. The electric steering mechanism can realize the steering drive of the two driving wheels 11 for travel. By using the electric steering mechanism to control the steering drive of the driving wheels 11 for travel, due to the high control accuracy of the lifting electric cylinder 4 and the driving motor 5 for travel, the precise control of the lifting of the working platform 3 and the precise control of the travel of the driving wheels 11 for travel can be realized.

[0023] On the basis of the above implementation, the specific implementation of the driving driving wheel 11 on the mobile chassis 1 is as follows: Two vertically arranged vertical sleeves 13 are fixedly arranged at one end of the frame of the mobile chassis 1, and the vertical sleeves 13 are fixedly connected to the corresponding parts of the frame. A rotatable steering support shaft 121 is sleeved in each of the vertical sleeves 13. A walking steering bracket 12 is arranged at the bottom of the steering support shaft 121. With the support of the steering support shaft 121, the rotation of the walking steering bracket 12 can be realized. The driving drive motor 5 is arranged on the walking steering bracket 12, and the driving driving wheel 11 is connected to the power output end of the corresponding driving drive motor 5. When the driving drive motor 5 drives the driving driving wheel 11 to rotate, the rotation of the walking driving wheel 11 is realized; Further, the specific implementation of the electric steering mechanism is as follows: The electric steering mechanism includes a steering electric cylinder 61 and a steering link 62. The two ends of the steering link 62 are respectively hinged to the upper parts of the corresponding walking steering brackets 12. With the connection of the steering link 62, the synchronous rotation of the two walking steering brackets 12 can be realized. The telescopic end of the steering electric cylinder 61 is hinged to one end of the steering link 62, and the other end of the steering electric cylinder 61 is hinged to the mobile chassis 1. Specifically, a support plate 15 is arranged at the lower part of the right end of the mobile chassis 1, and a hinge seat 14 is hinged to the bottom of the fixed end of the steering electric cylinder 61. The hinge seat 14 is fixedly connected to the support plate 15. The telescopic movement of the steering electric cylinder 61 drives the movement of the steering link 62, and the movement of the steering link 62 realizes the directional swing of the two walking steering brackets 12, and finally realizes the steering of the driving driving wheel 11.

[0024] To improve steering safety, a left steering limit photoelectric detection switch 101 and a right steering limit photoelectric detection switch 102 are provided at one end of the mobile chassis 1. The left steering limit photoelectric detection switch 101 is located at the upper front side of one of the walking steering brackets 12, and the right steering limit photoelectric detection switch 102 is located at the upper front side of the other walking steering bracket 12. The controller is electrically connected to both the left steering limit photoelectric detection switch 101 and the right steering limit photoelectric detection switch 102. During actual application, when the two walking steering brackets 12 continuously rotate to the left, the upper part of the left walking steering bracket 12 approaches the left steering limit photoelectric detection switch 101 at the corresponding detection position. When the left steering limit photoelectric detection switch 101 detects the left walking steering bracket 12, it sends a corresponding detection signal to the controller. After receiving the corresponding detection signal, the controller sends a stop working instruction to the steering electric cylinder 61, thereby realizing steering limit. During the continuous left rotation of the two walking steering brackets 12, the right steering limit photoelectric detection switch 102 never detects the existence of the corresponding walking steering bracket 12. When the two walking steering brackets 12 continuously rotate to the right, the upper part of the right walking steering bracket 12 approaches the right steering limit photoelectric detection switch 102 at the corresponding detection position. When the right steering limit photoelectric detection switch 102 detects the right walking steering bracket 12, it sends a corresponding detection signal to the controller. After receiving the corresponding detection signal, the controller sends a stop working instruction to the steering electric cylinder 61, thereby realizing steering limit. During the continuous right rotation of the two walking steering brackets 12, the left steering limit photoelectric detection switch 101 never detects the existence of the corresponding walking steering bracket 12.

[0025] To further improve the operation safety of the present utility model, an inclination sensor 103 is provided on the upper part of the mobile chassis 1. The inclination sensor 103 is electrically connected to the controller. The inclination sensor 103 continuously monitors the inclination angle of the mobile chassis 1. The controller continuously compares the monitoring data of the inclination sensor 103 with the set threshold. When the monitored inclination angle is greater than the set threshold, the controller can activate the alarm system, so that the staff should pay attention to the inclination angle of the mobile chassis 1 to ensure the safety of working at height.

[0026] In order to further improve the safety of lifting, a limit monitoring can be performed on the lifting. Specifically, the scissor-type lifting frame 2 includes a first X-shaped component 21, a second X-shaped component, a third X-shaped component, and a fourth X-shaped component. The first X-shaped component 21, the second X-shaped component, the third X-shaped component and the fourth X-shaped component have the same composition structure. The first X-shaped component 21 includes two groups of X-shaped structures distributed front and back, each group of X-shaped structures includes two support rods 211 distributed in an X shape, and the two support rods 211 in each group of X-shaped structures are hingedly connected in the middle. The first X-shaped component 21, the second X-shaped component, the third X-shaped component and the fourth X-shaped component are hingedly connected from low to high in sequence. The lower left part of the first X-shaped component 21 is hingedly connected to the upper part of the mobile chassis 1, and the lower right part of the first X-shaped component 21 is slidably connected to the mobile chassis 1. The fixed end of the lifting electric cylinder 4 is hingedly connected to the upper right part of the first X-shaped component 21, and the telescopic end of the lifting electric cylinder 4 is hingedly connected to the The lower left part of the third X-shaped component is hingedly connected, and the telescopic movement of the lifting electric cylinder 4 is used to realize the synchronous expansion and folding of the four groups of X-shaped components, thereby realizing the telescopic movement of the scissor-type lifting frame 2. A lower limit detection plate 212 is fixedly arranged at the upper right position of the lower left part of the first X-shaped component 21, and a lower limit travel switch 104 corresponding to the lower limit detection plate 212 is arranged on the mobile chassis 1. When the lower limit detection plate 212 contacts the lower limit travel switch 104, the lifting electric cylinder 4 is powered off, thereby preventing the working platform 3 from continuing to descend. An upper limit travel switch 105 corresponding to the moving slider 213 at the lower right part of the first X-shaped component 21 is arranged on the mobile chassis 1. When the moving slider 213 contacts the upper limit travel switch 105, the lifting electric cylinder 4 is powered off, thereby preventing the working platform 3 from continuing to rise. The lower limit travel switch 104 and the upper limit travel switch 105 are both electrically connected to the controller.

[0027] In the present utility model, "upper", "lower", "front", "back", "left" and "right" are relative positions used to conveniently describe positional relationships, and therefore cannot be understood as absolute positions to limit the scope of protection.

[0028] Except for the technical features described in the specification, all other technical features are known technologies to those skilled in the art.

[0029] The above description in combination with the accompanying drawings has detailed the preferred implementation modes and embodiments of the utility model, but the utility model is not limited to the above implementation modes and embodiments. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the concept of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model.

Claims

1. A pure electric scissor lift truck, comprising a mobile chassis, a scissor lift, a working platform, and a controller. The scissor lift is arranged on the mobile chassis, and the working platform is arranged on the scissor lift. At one end of the mobile chassis, there are two driving wheels for traveling. It is characterized in that, The scissor lift also includes a lifting electric cylinder, a driving motor for traveling, and an electric steering mechanism. The lifting electric cylinder is arranged on the scissor lift. The telescopic operation of the lifting electric cylinder can realize the lifting movement of the scissor lift. Each of the driving driving wheels is rotationally driven by one of the driving motors for traveling, and the electric steering mechanism can realize the steering drive of the two driving driving wheels.

2. The electric scissor lift according to claim 1, characterized in that, Two vertically arranged vertical sleeves are fixedly arranged at one end of the frame of the mobile chassis. A rotatable steering support shaft is sleeved in each of the vertical sleeves. A traveling steering bracket is arranged at the bottom of the steering support shaft. The driving motor for traveling is arranged on the traveling steering bracket. The driving driving wheel is connected to the power output end of the corresponding driving motor for traveling.

3. The electric scissor lift according to claim 2, wherein The electric steering mechanism includes a steering electric cylinder and a steering connecting rod. The two ends of the steering connecting rod are respectively hinged to the upper parts of the corresponding traveling steering brackets. The telescopic end of the steering electric cylinder is hinged to one end of the steering connecting rod. The other end of the steering electric cylinder is hinged to the mobile chassis.

4. A pure electric scissor lift aerial work platform according to claim 3, characterized in that, A left steering limit photoelectric detection switch and a right steering limit photoelectric detection switch are arranged at one end of the mobile chassis. The left steering limit photoelectric detection switch is located at the upper front side of one of the traveling steering brackets. The right steering limit photoelectric detection switch is located at the upper front side of the other traveling steering bracket. The controller is electrically connected to both the left steering limit photoelectric detection switch and the right steering limit photoelectric detection switch.

5. A pure electric scissor type aerial work platform according to claim 3, characterized in that, An inclination sensor is arranged on the upper part of the mobile chassis. The inclination sensor is electrically connected to the controller.

6. A pure electric scissor lift aerial work platform according to claim 3, characterized in that, The scissor lift includes a first X-shaped component, a second X-shaped component, a third X-shaped component, and a fourth X-shaped component. The first X-shaped component, the second X-shaped component, the third X-shaped component, and the fourth X-shaped component are sequentially hinged to each other from low to high. The lower left part of the first X-shaped component is hinged to the upper part of the mobile chassis. The lower right part of the first X-shaped component is slidably connected to the mobile chassis. The fixed end of the lifting electric cylinder is hinged to the upper right part of the right side of the first X-shaped component. The telescopic end of the lifting electric cylinder is hinged to the lower left part of the third X-shaped component. A lower limit detection plate is fixedly arranged at the upper right position near the lower left part of the first X-shaped component. A lower limit travel switch corresponding to the lower limit detection plate is arranged on the mobile chassis. An upper limit travel switch corresponding to the moving slider at the lower right part of the first X-shaped component is arranged on the mobile chassis. The lower limit travel switch and the upper limit travel switch are both electrically connected to the controller.

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