Foldable electric trolley

Abstract

The utility model relates to the technical field of trolleys, in particular to a foldable electric trolley which comprises a trolley body, and the front end and the rear end of the trolley body are provided with a front folding rod assembly and a rear folding rod assembly respectively, a left motor wheel and a right motor wheel are symmetrically arranged on the left side and the right side of the vehicle body, and the left motor wheel and the right motor wheel are connected through damping suspension mechanisms symmetrically arranged on the left side and the right side of the vehicle body respectively. The electric trolley is simple in structure, good in single-person or double-person control effect, capable of achieving rapid folding and stretching, capable of being suitable for being used in a small number of environments and good in object carrying effect.

Description

Technical Field

[0001] This utility model relates to the field of handcart technology, and in particular to a foldable electric handcart. Background Technology

[0002] Handcarts are powered by human effort, enabling short-distance transport by pushing or pulling. They are characterized by simple operation, low maintenance costs, and light weight, making them particularly suitable for scenarios where motor vehicles are inconvenient to navigate or for transporting lighter items. To further save manpower, electric handcarts have emerged.

[0003] Chinese invention patent CN116424402A discloses a multi-purpose electric handcart, including a vehicle body, a front control handle assembly, a rear control handle assembly, and a motor drive axle assembly. The vehicle body includes a frame and a telescopic main tube. The front control handle assembly includes a front telescopic rod, a front handle assembly, and a side bracket. The rear control handle assembly includes a rear telescopic rod, a rear handle assembly, and a side bracket. Both the front and rear handle assemblies include a handle tube, a handle sleeve, and a quick-release tube clamp. The upper end of the side bracket is provided with a rotating positioning arc, and the other end of the corresponding telescopic rod is provided with a positioning pin. A control rod is provided on the side bracket, and a foot pedal is provided at the lower end of the control rod. The upper end of the control rod is connected to a retaining sleeve, and a spring is provided between the retaining sleeve and the fixing plate. The upper end of the retaining sleeve is provided with a positioning boss. The front / rear telescopic rods are provided with arc surfaces, and multiple positioning holes are opened on the arc surfaces. The positioning boss switches between multiple positioning holes to realize the folding and unfolding of the side bracket. This electric trolley can be quickly folded, unfolded, and supported at multiple angles to adapt to various complex terrains.

[0004] Regarding the method of achieving rapid folding and unfolding of the electric handcart, according to the description in paragraph

[0026] of its instruction manual: the clamp is also provided with a spring positioning pin, and correspondingly, the front telescopic rod and the rear telescopic rod are provided with several positioning holes along the axial direction. The front end of the spring positioning pin is a locking end that cooperates with the positioning hole. By pulling out or inserting the locking end of the spring positioning pin into the positioning hole, the front and rear telescopic rods can be quickly extended and retracted in the telescopic main tube, so as to realize the rapid switching between the fully unfolded, half-unfolded and folded states of the electric handcart.

[0005] Although the structure can switch between three states—fully unfolded, half-unfolded, and folded—through the interlocking of the front and rear telescopic rods and the telescopic main tube, each state requires the use of spring positioning pins. This not only increases the complexity of the structure but also makes the operation cumbersome, as the spring positioning pins need to be inserted and removed each time a switch is made.

[0006] On the other hand, since the area can only be used to carry objects by means of the frame, it is small and cannot be expanded; if it is necessary to transport wounded people lying flat or long objects, it cannot provide a large enough carrying area.

[0007] Therefore, a new technical solution is urgently needed to solve the above-mentioned technical problems. Utility Model Content

[0008] The purpose of this utility model is to overcome the problems of the prior art and provide a foldable electric handcart to solve the technical problems of the existing telescopic poles being structurally complex, having cumbersome state switching operations when fully unfolded, partially unfolded, or folded; and being unable to provide a sufficiently large carrying area for transporting lying wounded or long objects.

[0009] The above objectives are achieved through the following technical solutions:

[0010] A foldable electric handcart includes a vehicle body, with a front folding rod assembly and a rear folding rod assembly respectively provided at the front and rear ends of the vehicle body, which can be folded and stored relative to the vehicle body and extended and pushed; a left motor wheel and a right motor wheel are symmetrically arranged on the left and right sides of the vehicle body, and the left motor wheel and the right motor wheel are respectively connected by a shock-absorbing suspension mechanism symmetrically arranged on the left and right sides of the vehicle body.

[0011] Furthermore, the vehicle body includes a platform and a battery box disposed below the platform. The battery box contains a rechargeable battery for supplying power to the left motor wheel and the right motor wheel, as well as a control board for controlling the left motor wheel and the right motor wheel.

[0012] Furthermore, both the left motor wheel and the right motor wheel are hub motors.

[0013] Furthermore, the shock-absorbing suspension mechanism includes a suspension support for fixed connection with the battery box, and a first shock-absorbing adjustment rod and a second shock-absorbing adjustment rod are symmetrically arranged on the suspension support and are parallel to each other; the first shock-absorbing adjustment rod and the second shock-absorbing adjustment rod are symmetrically arranged with a shock-absorbing adjustment position and a suspension mounting position; a suspension assembly is hinged to the suspension mounting position, one end of the shock absorber is hinged to the shock-absorbing adjustment position, and the other end is hinged to the suspension assembly.

[0014] Furthermore, the shock-absorbing adjustment position is provided with several pin through holes from top to bottom. Two of the pin through holes located symmetrically on the first shock-absorbing adjustment rod and the second shock-absorbing adjustment rod are connected by pins, and the end of the shock absorber is sleeved with the pins.

[0015] Further, the suspension assembly includes a first tie rod and a second tie rod hinged to the first shock absorber adjusting rod, and a third tie rod and a fourth tie rod hinged to the second shock absorber adjusting rod; the outer ends of the first tie rod and the second tie rod are also connected to a fifth tie rod, and the outer ends of the third tie rod and the fourth tie rod are also connected to a sixth tie rod; the first end of the first tie rod, the first end of the third tie rod, the first shock absorber adjusting rod, and the second shock absorber adjusting rod are hinged together by a first short shaft; the first end of the second tie rod, the first end of the fourth tie rod, the first shock absorber adjusting rod, and the second shock absorber adjusting rod are hinged together by a second short shaft; the second end of the first tie rod, the top end of the fifth tie rod, the second end of the third tie rod, and the top end of the sixth tie rod are hinged together by a third short shaft; the second end of the second tie rod, the bottom end of the fifth tie rod, the second end of the fourth tie rod, and the bottom end of the sixth tie rod are hinged together by a fourth short shaft; the other end of the shock absorber is sleeved with the third short shaft.

[0016] Furthermore, the fifth pull rod and the sixth pull rod are respectively fixedly connected to the left motor wheel or the right motor wheel.

[0017] Furthermore, both the front folding rod assembly and the rear folding rod assembly include a left hinge seat and a right hinge seat symmetrically arranged on the side of the platform. A left folding rod is hinged to the left hinge seat, and a right folding rod is hinged to the right hinge seat. A left handle and a right handle are respectively provided at the ends of the left folding rod and the right folding rod.

[0018] Furthermore, a braking device is provided on the left handlebar, and a speed regulating device is provided on the right handlebar.

[0019] Furthermore, it also includes a mesh panel for laying flat on the front folding rod assembly and the rear folding rod assembly in their extended state.

[0020] This utility model provides a foldable electric handcart that achieves rapid folding and unfolding of the front and rear folding rod assemblies through horizontal rotation folding. It employs a shock-absorbing suspension mechanism to provide shock absorption and height control of the loading platform when driving on uneven or bumpy roads or in mountainous environments. This electric handcart not only has a simple structure and good single or double-person control, but also achieves rapid folding and unfolding, making it suitable for most environments and offering good carrying capacity. Attached Figure Description

[0021] Figure 1 This is a first-view structural diagram of a foldable electric handcart according to the present invention;

[0022] Figure 2 This is a second-view structural diagram of a foldable electric handcart according to the present invention;

[0023] Figure 3 This is a third-view structural diagram of a foldable electric handcart according to the present invention;

[0024] Figure 4 This is a schematic diagram of the shock-absorbing suspension mechanism in a foldable electric handcart according to the present invention;

[0025] Figure 5 This is a schematic diagram showing the connection between the hinge seat and the folding rod in a foldable electric handcart according to the present invention;

[0026] Figure 6 This is a schematic diagram of a foldable electric handcart with a mesh panel according to the present invention.

[0027] Illustration markings:

[0028] 1-Vehicle body, 101-Platform, 102-Battery box;

[0029] 2-Front folding rod assembly;

[0030] 3- Rear folding rod assembly;

[0031] 4-Left motor wheel;

[0032] 5-Right motor wheel;

[0033] 6-Shock-absorbing suspension mechanism, 601-Suspension support, 602-First shock absorber adjusting rod, 603-Second shock absorber adjusting rod, 604-Shock absorber adjusting position, 605-Suspension mounting position, 606-Suspension assembly, 607-Shock absorber, 608-Pin through hole, 609-Pin, 610-First tie rod, 611-Second tie rod, 612-Third tie rod, 613-Fourth tie rod, 614-Fifth tie rod, 615-Sixth tie rod, 616-First short shaft, 617-Second short shaft, 618-Third short shaft, 619-Fourth short shaft;

[0034] 7-Left hinge seat, 8-Right hinge seat, 9-Left folding rod, 10-Right folding rod, 11-Left handle, 12-Right handle, 13-Brake device, 14-Speed ​​control device, 15-Network panel, 16-Control button, 17-Handrail. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. The described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0036] like Figures 1-3 As shown, this solution provides a foldable electric handcart, including a vehicle body 1. The front and rear ends of the vehicle body 1 are respectively provided with a front folding rod assembly 2 and a rear folding rod assembly 3, which can be folded and stored relative to the vehicle body 1 and extended and pushed. The left motor wheel 4 and the right motor wheel 5 are symmetrically arranged on the left and right sides of the vehicle body 1, and the left motor wheel 4 and the right motor wheel 5 are respectively connected by shock-absorbing suspension mechanisms 6 symmetrically arranged on the left and right sides of the vehicle body 1.

[0037] Specifically, the usage method of the foldable trolley provided in this solution is as follows:

[0038] When single-person operation is required, simply stand at the front or rear of the vehicle body 1, then rotate the front folding rod assembly 2 or the rear folding rod assembly 3 horizontally to extend it, and then the operator can hold the front folding rod assembly 2 or the rear folding rod assembly 3 with both hands to push it.

[0039] When two people are required to operate the vehicle, they stand at the front and rear of the vehicle body 1 respectively. Then, the front folding rod assembly 2 and the rear folding rod assembly 3, which are in the folded storage state, are rotated horizontally to extend them. Then, the operator in front holds the front folding rod assembly 2 with both hands and the rear folding rod assembly 3 with both hands to push the vehicle.

[0040] Because this device is equipped with a left motor wheel 4 and a right motor wheel 5, it can achieve electric drive of the wheels, and the operator only needs to control the direction of travel.

[0041] Furthermore, since the left motor wheel 4 and the right motor wheel 5 are connected by shock-absorbing suspension mechanisms 6 symmetrically arranged on the left and right sides of the vehicle body 1, shock absorption can be provided when driving on uneven or bumpy roads or in mountainous environments. This prevents the wheels from transmitting vibrations to the vehicle body 1, or even along the vehicle body 1 to the front folding rod assembly 2 and the rear folding rod assembly 3, thus avoiding the problem of objects falling off the vehicle body 1 and the operator's arm numbness caused by prolonged vibration.

[0042] In this embodiment, the vehicle body 1 includes a platform 101 and a battery box 102 disposed below the platform 101. The battery box 102 contains a rechargeable battery for supplying power to the left motor wheel 4 and the right motor wheel 5, as well as a control board for controlling the left motor wheel 4 and the right motor wheel 5. A control button 16 connected to the control board can also be embedded in the side wall of the battery box 102 to control the start and stop of the left motor wheel 4 and the right motor wheel 5, that is, to control the power switch of this foldable electric handcart.

[0043] The left motor wheel 4 and the right motor wheel 5 are both hub motors, which are connected to the control motherboard and the rechargeable battery, respectively.

[0044] In-wheel motors are a type of motor technology that highly integrates the power system, transmission system, and braking device within the wheel hub. Their core feature is that they directly drive the wheel's rotation, eliminating the need for complex mechanical transmission components such as clutches, gearboxes, drive shafts, and differentials required in traditional vehicles.

[0045] The rechargeable battery can be a lithium battery.

[0046] like Figure 4 As shown, the shock-absorbing suspension mechanism 6 in this embodiment includes a suspension support 601 for being fixedly connected to the battery box 102. The suspension support 601 is symmetrically provided with a first shock-absorbing adjustment rod 602 and a second shock-absorbing adjustment rod 603 that are parallel to each other.

[0047] The first shock absorber adjustment rod 602 and the second shock absorber adjustment rod 603 are symmetrically provided with shock absorber adjustment positions 604 and suspension mounting positions 605; a suspension assembly 606 is hinged to the suspension mounting position 605, one end of the shock absorber 607 is hinged to the shock absorber adjustment position 604, and the other end is hinged to the suspension assembly 606.

[0048] The height of the shock absorber 607 can be adjusted by the shock absorber adjustment position 604, which in turn indirectly adjusts the angle of the suspension assembly 606, thereby achieving the purpose of adjusting the height of the vehicle body 1 from the ground and adapting to different road conditions.

[0049] Specifically, the shock-absorbing adjustment position 604 is provided with a plurality of pin through holes 608 from top to bottom. Two pin through holes 608 located symmetrically on the first shock-absorbing adjustment rod 602 and the second shock-absorbing adjustment rod 603 are connected by pins 609. The end of the shock absorber 607 is sleeved with the pins 609 to achieve the purpose of hinge connection.

[0050] As a specific embodiment of this solution, the shock absorption adjustment position 604 is provided with three pin through holes 608 from top to bottom.

[0051] The suspension assembly 606 includes a first tie rod 610 and a second tie rod 611 hinged to the first shock absorber adjustment rod 602, and a third tie rod 612 and a fourth tie rod 613 hinged to the second shock absorber adjustment rod 603.

[0052] The outer ends of the first pull rod 610 and the second pull rod 611 are also connected to a fifth pull rod 614, and the outer ends of the third pull rod 612 and the fourth pull rod 613 are also connected to a sixth pull rod 615; the first end of the first pull rod 610, the first end of the third pull rod 612, the first shock-absorbing adjustment rod 602 and the second shock-absorbing adjustment rod 603 are hinged together by a first short shaft 616; the first end of the second pull rod 611, the first end of the fourth pull rod 613, the first shock-absorbing adjustment rod 602 and the second shock-absorbing adjustment rod 603 are hinged together by a second short shaft 617.

[0053] The second end of the first pull rod 610, the top end of the fifth pull rod 614, the second end of the third pull rod 612, and the top end of the sixth pull rod 615 are hinged together by a third short shaft 618; the second end of the second pull rod 611, the bottom end of the fifth pull rod 614, the second end of the fourth pull rod 613, and the bottom end of the sixth pull rod 615 are hinged together by a fourth short shaft 619.

[0054] The other end of the shock absorber 607 is sleeved with the third short shaft 618 to achieve the purpose of hinge connection.

[0055] In the above structure, the suspension assembly 616 forms a foldable rectangular frame structure with the first shock absorber adjustment rod 602 and the second shock absorber adjustment rod 603, and achieves elastic support under the action of the shock absorber 607.

[0056] The fifth pull rod 614 and the sixth pull rod 615 are respectively fixedly connected to the left motor wheel 4 or the right motor wheel 5.

[0057] In this structure, the left motor wheel 4 and the right motor wheel 5 can swing synchronously, especially when turning, thus providing stable support for the vehicle.

[0058] like Figure 1 , Figure 2 and Figure 5 As shown, in this embodiment, both the front folding rod assembly 2 and the rear folding rod assembly 3 include a left hinge seat 7 and a right hinge seat 8 symmetrically arranged on the side of the platform 101. A left folding rod 9 is hinged to the left hinge seat 7, and a right folding rod 10 is hinged to the right hinge seat 8. The ends of the left folding rod 9 and the right folding rod 10 are respectively provided with a left handle 11 and a right handle 12 for the operator to grip and control.

[0059] It should be noted that, in this embodiment, the left folding rod 9 and the right folding rod 10 can only be folded inward relative to the left hinge seat 7 and the right hinge seat 8, so that when stored, the left folding rod 9 and the right folding rod 10 are located close to the side of the platform 101.

[0060] The left handlebar 11 is equipped with a brake device 13, and the right handlebar 12 is equipped with a speed regulating device 14.

[0061] As a result of the braking device 13 described in this embodiment, it can be implemented by a common friction brake or auxiliary braking system to achieve braking control of the left motor wheel or the right motor wheel.

[0062] Friction brakes include:

[0063] A drum brake consists of a brake drum, brake shoes, a return spring, and a hydraulic wheel cylinder. Under hydraulic pressure, the brake shoes expand outward and rub against the inner wall of the rotating brake drum.

[0064] Disc brakes consist of a brake disc, brake caliper, brake pads, and hydraulic caliper. The brake pads clamp the rotating brake disc to achieve friction braking.

[0065] An air-expansion brake uses high-pressure gas to drive the rubber ring to expand, causing the friction pads to contact the fixed shaft for braking. It automatically resets after the air pressure is released.

[0066] The auxiliary braking system includes:

[0067] The ABS anti-lock braking system uses electronic sensors to monitor wheel speed and dynamically adjust braking force to prevent wheel lock-up and maintain steering capability.

[0068] Since the connection and implementation of the brakes described above are common knowledge in this field, they will not be elaborated upon here.

[0069] As the speed regulating device 14 described in this embodiment is implemented by controlling the magnitude of the power supply current of the left motor wheel 4 and the right motor wheel 5, since its principle and circuit structure are common knowledge in the field, they will not be described in detail here.

[0070] like Figure 6 As shown, this embodiment also includes a mesh plate 15, which is laid flat on the front folding rod assembly 2 and the rear folding rod assembly 3 in the extended state to increase the carrying area; under this structure, it is possible to transport the wounded lying flat or long objects.

[0071] As an optimization of this embodiment, handrails 17 can also be provided on the left and right sides of the platform 101 so that the injured person can grab them; or they can be used to limit and bind the objects on the platform 101 with ropes.

[0072] The above description is only for illustrating the embodiments of this utility model and is not intended to limit this utility model. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A foldable electric handcart, characterized in that, The vehicle includes a vehicle body (1), and the front and rear ends of the vehicle body (1) are respectively provided with a front folding rod assembly (2) and a rear folding rod assembly (3) that can be folded and stored relative to the vehicle body (1) and extended and pushed. The left and right sides of the vehicle body (1) are symmetrically provided with a left motor wheel (4) and a right motor wheel (5), and the left motor wheel (4) and the right motor wheel (5) are respectively connected by a shock-absorbing suspension mechanism (6) symmetrically provided on the left and right sides of the vehicle body (1).

2. The foldable electric handcart according to claim 1, characterized in that, The vehicle body (1) includes a platform (101) and a battery box (102) disposed below the platform (101). The battery box (102) contains a rechargeable battery for supplying power to the left motor wheel (4) and the right motor wheel (5), as well as a control board for controlling the left motor wheel (4) and the right motor wheel (5).

3. A foldable electric handcart according to claim 2, characterized in that, Both the left motor wheel (4) and the right motor wheel (5) are hub motors.

4. A foldable electric handcart according to claim 2, characterized in that, The shock-absorbing suspension mechanism (6) includes a suspension support (601) for fixed connection with the battery box (102), and a first shock-absorbing adjustment rod (602) and a second shock-absorbing adjustment rod (603) are symmetrically arranged on the suspension support (601) and are parallel to each other. The first damping adjustment rod (602) and the second damping adjustment rod (603) are symmetrically provided with damping adjustment positions (604) and suspension mounting positions (605); a suspension assembly (606) is hinged to the suspension mounting position (605), one end of the shock absorber (607) is hinged to the damping adjustment position (604), and the other end is hinged to the suspension assembly (606).

5. A foldable electric handcart according to claim 4, characterized in that, The shock-absorbing adjustment position (604) is provided with a plurality of pin through holes (608) from top to bottom. Two pin through holes (608) located symmetrically on the first shock-absorbing adjustment rod (602) and the second shock-absorbing adjustment rod (603) are connected by pins (609). The end of the shock absorber (607) is sleeved with the pins (609).

6. A foldable electric handcart according to claim 5, characterized in that, The suspension assembly (606) includes a first tie rod (610) and a second tie rod (611) hinged to the first damping adjustment rod (602), and a third tie rod (612) and a fourth tie rod (613) hinged to the second damping adjustment rod (603). The outer ends of the first pull rod (610) and the second pull rod (611) are also connected to a fifth pull rod (614), and the outer ends of the third pull rod (612) and the fourth pull rod (613) are also connected to a sixth pull rod (615); the first end of the first pull rod (610), the first end of the third pull rod (612), the first shock-absorbing adjustment rod (602) and the second shock-absorbing adjustment rod (603) are hinged together by a first short shaft (616); the first end of the second pull rod (611), the first end of the fourth pull rod (613), the first shock-absorbing adjustment rod (602) and the second shock-absorbing adjustment rod (603) are hinged together by a second short shaft (617); The second end of the first pull rod (610), the top end of the fifth pull rod (614), the second end of the third pull rod (612), and the top end of the sixth pull rod (615) are hinged together by a third short shaft (618); the second end of the second pull rod (611), the bottom end of the fifth pull rod (614), the second end of the fourth pull rod (613), and the bottom end of the sixth pull rod (615) are hinged together by a fourth short shaft (619). The other end of the shock absorber (607) is fitted onto the third short shaft (618).

7. A foldable electric handcart according to claim 6, characterized in that, The fifth pull rod (614) and the sixth pull rod (615) are respectively fixedly connected to the left motor wheel (4) or the right motor wheel (5).

8. A foldable electric handcart according to claim 2, characterized in that, Both the front folding rod assembly (2) and the rear folding rod assembly (3) include a left hinge seat (7) and a right hinge seat (8) symmetrically arranged on the side of the platform (101). A left folding rod (9) is hinged on the left hinge seat (7), and a right folding rod (10) is hinged on the right hinge seat (8). A left handle (11) and a right handle (12) are respectively provided at the ends of the left folding rod (9) and the right folding rod (10).

9. A foldable electric handcart according to claim 8, characterized in that, The left handle (11) is equipped with a brake device (13), and the right handle (12) is equipped with a speed regulating device (14).

10. A foldable electric handcart according to claim 1 or 8, characterized in that, It also includes a mesh panel (15) for laying flat on the front folding rod assembly (2) and the rear folding rod assembly (3) in the extended state.

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