Cart with lifting assisting structure

Abstract

The utility model discloses a cart with a lifting power-assisting structure, which comprises a cart main body and a power-assisting wheel lifting assembly arranged on the cart main body, the power-assisting wheel lifting assembly is arranged in the middle of the lower part of the front end of the cart, the cart main body is provided with a battery and a controller, the controller is used for responding to a control instruction, and the power-assisting wheel lifting assembly is arranged on the cart main body. The power assisting wheel lifting assembly is controlled to act, and the battery supplies power to the controller and electric components of the power assisting wheel lifting assembly. According to the cart with the lifting power-assisting structure, the electric power-assisting wheels can be additionally arranged on the cart to provide movement power assisting, when the tractor moves in a traction mode or the power-assisting wheels break down, the power-assisting wheels can be lifted to be away from the ground, and the labor intensity of manually pushing and pulling the cart can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the trolley technical field, especially a trolley with lifting power assisting structure. BACKGROUND

[0002] The handcart is the vehicle that carries out push, draws with manual force, it is low in cost, maintains simple, convenient operation, light in weight, can work in the place where the motor vehicle is inconvenient to use, when short-distance carries the article, it is very convenient, therefore has been widely used in production and life. The short-distance carrying of workpieces or articles is often completed using the handcart in the manufacturing enterprise. However, the existing handcart completely relies on manual force and does not have a power assisting device, so the labor intensity of the operator is relatively high. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at overcoming the insufficient and defects of prior art, and provides a trolley with lifting power assisting structure.

[0004] A trolley with lifting power assisting structure, including trolley main part and installing on the trolley main part power assisting wheel lifting subassembly, power assisting wheel lifting subassembly arrangement in the middle part below the front end of trolley, trolley main part arrangement has battery, controller, the controller is used to respond control instruction, control power assisting wheel lifting subassembly action, the battery provides power for the electric component of controller and power assisting wheel lifting subassembly.

[0005] Among them, the power assisting wheel lifting subassembly includes power assisting wheel subassembly, and the curved arm subassembly connected with the power assisting wheel subassembly, and the electric push rod connected with the curved arm subassembly.

[0006] Among them, the electric push rod is connected with the curved arm subassembly through a long round hole connecting plate with long round hole.

[0007] Among them, the power assisting wheel subassembly includes power assisting wheel and the fixed support for being fixed with trolley bottom, rotating support, the rotating support installs power assisting wheel, and the rotating support is connected with the fixed support using shaft.

[0008] Among them, the rotating support is connected with the fixed support on one side through at least one tension spring.

[0009] Among them, the fixed support includes a base plate, and two vertical plates connected with two opposite sides of the base plate, and the vertical plate is connected with the rotating support using the shaft.

[0010] Among them, the inner side of the vertical plate is arranged with the rotation angle limiting plate of the rotating support, for preventing the rotating support from rotating beyond the working range of the tension spring.

[0011] The first stroke switch is arranged in a stroke range of the electric push rod, and is used for controlling the action of the electric push rod.

[0012] The second stroke switch is arranged on the lower part of the trolley near the lower part of the traction control assembly.

[0013] The handle of the trolley is arranged with a control assembly, including an operation assembly used for operating and controlling the power-assisted wheel lifting assembly, and a display and a buzzer warning light used for displaying battery power information.

[0014] The trolley with the lifting power structure can increase the electric power-assisted wheel on the trolley, provide moving power, and when the towing vehicle is in traction movement or the power-assisted wheel is in failure, the power-assisted wheel can be lifted to be separated from the ground, so that the labor intensity of manually pushing and pulling the trolley can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic view of the trolley with the lifting power structure of the utility model;

[0016] Figure 2 is a schematic view of the power-assisted wheel lifting assembly of the trolley with the lifting power structure of the utility model;

[0017] Figure 3 is a schematic view of the traction control assembly of the trolley with the lifting power structure of the utility model;

[0018] Figure 4 is a schematic view of the control assembly of the trolley with the lifting power structure of the utility model.

[0019] Figure 5 is a schematic view of the power-assisted wheel assembly of the trolley with the lifting power structure of the utility model.

[0020] Figure 6 is a first state schematic view of the power-assisted wheel assembly of the trolley with the lifting power structure of the utility model.

[0021] Figure 7 is a second state schematic view of the power-assisted wheel assembly of the trolley with the lifting power structure of the utility model. DETAILED DESCRIPTION

[0022] The utility model will be further described in detail below in combination with the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0023] Please refer to the appendix. Figures 1-7 As shown, the trolley 100 with lifting assist structure of this utility model includes a trolley body 1 and an assist wheel lifting assembly 6 installed on the trolley body. The assist wheel lifting assembly is arranged in the lower middle part of the front end of the trolley. The trolley body is equipped with a battery 4 and a controller 3. The controller is used to respond to control commands and control the operation of the assist wheel lifting assembly. The battery provides power to the controller and the power-consuming components of the assist wheel lifting assembly.

[0024] In some embodiments, the power-assisted wheel lifting assembly 6 includes a power-assisted wheel assembly, a crank arm assembly connected to the power-assisted wheel assembly, and an electric actuator 61 connected to the crank arm assembly. When the electric actuator moves linearly, it drives the crank arm 67 of the crank arm assembly to rotate, causing the power-assisted wheel 60 of the power-assisted wheel assembly to rotate for lifting. The crank arm 67 is connected to a shaft 69, rotates around it, and is connected to a rotating bracket 64 of the power-assisted wheel lifting assembly via a connecting rod 671 connected to its other end, driving the rotating bracket 64 to rotate, thereby causing the power-assisted wheel 60 mounted on the rotating bracket to lift.

[0025] In some embodiments, the electric actuator 61 is connected to the crank arm assembly via an elongated hole connecting plate 68 with an elongated hole, that is, one end of the electric actuator is connected to one end of the elongated hole connecting plate, and the other end of the elongated hole connecting plate is connected to one end of the crank arm 67 of the crank arm assembly via a connecting shaft.

[0026] In some embodiments, the assist wheel assembly includes an assist wheel 60 and a fixed bracket 63 for fixing to the bottom of the trolley, and a rotating bracket 64 on which the assist wheel 60 is mounted. The rotating bracket and the fixed bracket 63 are connected by a shaft 70. The rotating bracket is driven to rotate relative to the fixed bracket, thereby rotating and raising / lowering the assist wheel, and may or may not be in contact with the ground. The assist wheel is fixed to the top of the rotating bracket via its wheel frame.

[0027] In some embodiments, the rotating bracket and the fixed bracket are connected on one side by at least one tension spring 65. Preferably, there are multiple tension springs, such as three, arranged spaced apart along their radial direction.

[0028] In some embodiments, the fixed support includes a base plate and two upright plates connected to two opposite sides of the base plate, the upright plates being connected to the rotating support via the shaft 70.

[0029] In some embodiments, the inner side of the upright plate is provided with a rotation angle limiting plate 71 for the rotating bracket, used to prevent the rotation angle of the rotating bracket from exceeding the working range of the tension spring, achieving both high and low position limiting. This is achieved through two bottom limiting slopes of the rotation angle limiting plate, which create a V-shaped structure on the bottom surface of the rotation angle limiting plate. Figure 6 , Figure 7 As shown.

[0030] In some embodiments, a first limit switch 66 is arranged within the stroke range of the electric actuator and connected to the controller for controlling the movement of the electric actuator; when the electric actuator is pushed forward to trigger the first limit switch, the controller receives a signal and controls the electric actuator to stop.

[0031] In this embodiment, the trolley is supported by four support wheels 2, and the assist wheel 60 is used to provide forward and backward power. In order to avoid the assist wheel being unable to contact the ground due to uneven ground and thus unable to provide power, the assist wheel bracket is designed as a mechanical type in this embodiment, so that the assist wheel is always pressed against the ground, thereby avoiding the situation where the assist wheel cannot contact the ground due to uneven ground.

[0032] In this embodiment, when the controller receives a preset first signal, it controls the electric push rod to retract. The electric push rod pulls the elongated hole connecting plate, which drives the crank arm assembly and then the rotating bracket to rotate upward, causing the assist wheel to rise. When the electric push rod retracts to trigger the first limit switch, the controller receives a signal and controls the electric push rod to stop. When the controller receives a preset second signal, it controls the electric push rod to push forward, which drives the elongated hole connecting plate. When the elongated hole on the connecting plate no longer pulls the crank arm, the tension spring pulls the rotating bracket, causing the assist wheel to touch the ground. When the electric push rod pushes forward to trigger the first limit switch, the controller receives a signal and controls the electric push rod to stop.

[0033] In some embodiments, the trolley further includes a traction control assembly 7, disposed at the rear end of the trolley, for traction operations. In some embodiments, the traction control assembly includes a traction frame, and a second limit switch 8 is installed on the trolley near the rotating mechanism of the traction control assembly, connected to a controller. When the traction control assembly is in a flat position, it will activate the second limit switch.

[0034] The traction frame has a triangular structure that can rotate. It is connected to the rear end of the trolley via a shaft to form a rotatable structure. When the traction frame is laid flat, it can trigger a second limit switch. The second limit switch can input an action signal to the controller, which controls the electric push rod to retract. The electric push rod pulls the elongated hole connecting plate, which drives the crank arm assembly and then the rotating bracket to rotate upward, causing the assist wheel to rise. When the electric push rod retracts to trigger the first limit switch, the controller receives a signal and controls the electric push rod to stop. When the traction frame changes from flat to upright, it triggers the second limit switch. The controller controls the electric push rod to push forward, driving the elongated hole connecting plate. When the elongated hole on the connecting plate no longer pulls the crank arm assembly, the tension spring pulls the rotating bracket, causing the assist wheel to touch the ground. When the electric push rod pushes forward to trigger the first limit switch, the controller receives a signal and controls the electric push rod to stop.

[0035] In some embodiments, the trolley also has a control component 5, which is electrically connected to the controller and arranged on the handle of the trolley. It is used to operate and control the power wheel lifting component and to display relevant preset information or to issue warning alarms. The user operates the control component to output control commands to the power wheel lifting component, and controls the power wheel lifting component to perform actions according to the commands.

[0036] In some embodiments, the control component includes a housing 57, the upper end of which is enclosed by a panel 50, forming an interior space containing wiring components connected to the control unit. The control component includes a lifting switch 53 for controlling the raising and lowering of the power-assisted wheel, a power switch 54 for connecting / disconnecting the power supply, and an emergency stop button 55 for controlling the device to stop in an emergency, all mounted on the panel. The display component includes a battery indicator 51 mounted on the panel, which includes a low battery alarm function to display the battery level and trigger an alarm, and a buzzer warning light 52 for alarming when a preset fault occurs in the device, such as a controller fault, an electric lever fault, or a limit switch fault. Knobs 56 for controlling the forward and backward movement of the power-assisted wheel are arranged at both ends of the housing 57. The knobs rotate clockwise or counterclockwise to control the forward and backward movement of the power-assisted wheel. The two knobs are connected by a connecting shaft and operate synchronously.

[0037] Furthermore, the corresponding positions on the panel display the laser-engraved names of the functional modules (not shown, i.e., the Chinese names of each component). Additionally, mounting components 58 are located at both ends of the housing 57 for mounting the housing onto the handle of the trolley.

[0038] In the embodiments of this application, the lifting switch has two modes via rotation: a manual mode and an automatic mode. In the embodiments of this application, when the lifting switch of the control component is switched to manual mode, the controller receives a signal and controls the electric push rod to retract. The electric push rod pulls the elongated hole connecting plate, causing the crank arm assembly to rotate upwards, thus raising the assist wheel. When the electric push rod retracts to trigger the first limit switch, the controller receives a signal and controls the electric push rod to stop. When the lifting switch of the control component is switched to automatic mode, the controller controls the electric push rod to push forward, driving the elongated hole connecting plate. When the elongated hole on the connecting plate no longer pulls the crank arm, the tension spring pulls the rotating bracket, causing the assist wheel to touch the ground. When the electric push rod pushes forward to trigger the first limit switch, the controller receives a signal and controls the electric push rod to stop.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic features of this utility model.

[0040] Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of the present invention is defined by the appended claims rather than the foregoing description. Thus, it is intended to encompass all variations falling within the meaning and scope of the equivalents of the claims within the present invention.

[0041] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. Stroller with lifting assistance structure, characterized in that, The stroller comprises a stroller body and a booster wheel lifting assembly installed on the stroller body, the booster wheel lifting assembly is arranged in the middle below the front end of the stroller, the stroller body is arranged with a battery and a controller, the controller is used to control the booster wheel lifting assembly to act in response to a control instruction, the battery provides power for the controller and the power consuming components of the booster wheel lifting assembly; the booster wheel lifting assembly comprises a booster wheel assembly and an electric push rod connected with the booster wheel assembly.

2. The stroller with lifting assistance structure of claim 1, wherein, The electric push rod is connected with the booster wheel assembly through a long round hole connecting plate with a long round hole.

3. The stroller with lift assist structure of claim 1, wherein, The booster wheel assembly comprises a booster wheel and a fixing support used to be fixed with the bottom of the stroller, a rotating support, the booster wheel is installed on the rotating support, the rotating support is connected with the fixing support through a shaft.

4. The stroller with lift assist structure of claim 3, wherein, The rotating support and the fixing support are connected through at least one tension spring on one side.

5. The stroller with lift assist structure of claim 4, wherein, The fixing support comprises a base plate and two vertical plates connected with two opposite sides of the base plate, the vertical plates are connected with the rotating support through the shaft.

6. The stroller with lift assist structure of claim 5, wherein, The inner side of the vertical plate is arranged with a rotating angle limiting plate of the rotating support, which is used to prevent the rotating angle of the rotating support from exceeding the working range of the tension spring.

7. The stroller with lift assist structure of claim 1, wherein, A first stroke switch is arranged in the stroke range of the electric push rod, which is used to control the action of the electric push rod.

8. The stroller with lift assist structure of claim 1, wherein, A traction control assembly is arranged on the handle side of the stroller, a second stroke switch is installed on the lower part of the stroller near the traction control assembly, the traction control assembly will touch the second stroke switch when it is in the flat state by rotating.

9. The stroller with lift assist structure of claim 1, wherein, A control assembly is arranged on the handle of the stroller, which comprises an operation assembly used to operate and control the booster wheel lifting assembly, a display and a buzzer warning light used to display the battery power information, the control assembly is operated by the user to output a control instruction to the booster wheel lifting assembly, the booster wheel lifting assembly acts according to the instruction.

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