Electric power-assisted single-wheel cart

Abstract

The utility model relates to the technical field of single-wheel carts, and particularly discloses an electric power-assisted single-wheel cart which is composed of a cart frame, a cart hopper, a hub motor, a power supply device and a control device. The vehicle frame is of a split type and comprises a lower machine frame assembly, a left handle, a right handle, a left supporting frame, a right supporting frame, a vehicle hopper front support and a vehicle hopper rear support which are all provided with installation holes and fixedly connected through bolts. Fixing nuts are welded on the frame part mounting holes; a direct-current brushless motor is arranged in the hub motor; and the control device comprises a safety key, a controller and a speed regulating wrench. The split type frame is adopted, disassembly is convenient, the transportation size is reduced, rapid positioning and installation are achieved through the welded fixing nuts, the direct-current brushless motor is controlled through the speed adjusting wrench and the controller to provide electric power and parking resistance, design is simplified, operation is convenient, electric power starting is limited by pulling out the safety key, and the safety performance is improved. And misoperation of children is prevented.

Description

Technical Field

[0001] The utility model relates to a wheelbarrow, in particular to an electric power-assisted wheelbarrow. Background Art

[0002] A wheelbarrow is a simple, convenient and practical human-powered freight tool, which is widely used in all aspects of production and life. However, no matter what scenario it is used in, it needs to rely on human power to push it, and it is particularly physically demanding when used in complex terrain, especially uphill sections.

[0003] An electric wheelbarrow is a wheelbarrow with an electric device added to it, so that people can use the power provided by the electric device when pushing the cart, saving manpower and reducing labor intensity. Based on this, the invention patent with publication number CN114026009A discloses an electric wheelbarrow, including a main body, a power supply device, a power device and a control device, wherein the main body includes a bucket, a main frame carrying the bucket and wheels mounted on the main frame. However, the main frame is connected to the handle in an integrated manner, which is large in size and not easy to carry. Utility Model Content

[0004] The purpose of the utility model is to provide an electric power-assisted wheelbarrow to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] An electric power-assisted wheelbarrow is composed of a frame, a bucket, a hub motor, a power supply device and a control device. The frame is a split type, including a lower frame assembly, a left handle, a right handle, a left support frame, a right support frame, a front bracket of the bucket, and a rear bracket of the bucket, all of which are provided with mounting holes and connected by bolts, and fixing nuts are welded on some of the mounting holes.

[0007] As a further solution of the utility model, the lower frame assembly is provided with a lower frame of a three-dimensional frame structure constructed of hollow tubes, the upper part of the lower frame is provided with a first transverse tube and a second transverse tube, the first transverse tube is provided with a vertically fixed controller fixing plate; the lower part of the lower frame is fixed with a hub motor fixing plate, the hub motor fixing plate is provided with a bayonet; the lower part of the lower frame is fixed with two symmetrically positioned vertical tubes.

[0008] As a further solution of the utility model, the power supply device includes a mobile battery, a waterproof cover and a waterproof cover fixing seat; the control device includes a switch device, a controller and a safety key.

[0009] As a further solution of the utility model, the left handle, the right handle, the left support frame, the right support frame, the front support frame of the truck bed, and the rear support frame of the truck bed are all tubular structures, wherein the left handle is inserted into the left tube hole of the lower frame facing the controller fixing plate, the right handle is inserted into the right tube hole of the lower frame facing the controller fixing plate, and the left support frame and the right support frame are respectively inserted into the first cross tube and the second cross tube.

[0010] As a further solution of the utility model, the frame includes an auxiliary wheel device, the auxiliary wheel device includes an auxiliary wheel and an auxiliary wheel bracket, the auxiliary wheel bracket is a tubular structure, and is connected to the vertical pipe with bolts.

[0011] As a further solution of the utility model, a waterproof cover is provided on the controller fixing plate, a mobile battery socket is provided on the waterproof cover, the waterproof cover fixing seat is fixed on the waterproof cover, the mobile battery is inserted into the mobile battery socket, and the waterproof cover is connected to the waterproof cover fixing seat.

[0012] As a further solution of the utility model, the safety key is a plug composed of conductive metal and an insulating shell; the controller and a safety key socket for inserting the safety key are provided on the controller fixing plate.

[0013] As a further solution of the utility model, the switch device is installed on the right handle and is provided with a power switch, a gear selection key, a first indicator light, a second indicator light and a speed regulating wrench.

[0014] As a further solution of the utility model, the speed regulating wrench is provided with an anti-slip protrusion.

[0015] As a further solution of the utility model, the hub motor is fixed at the bayonet of the hub motor fixing plate, and includes a brushless DC motor, a wheel hub and a tire.

[0016] The beneficial effects of the utility model are:

[0017] 1. By adopting a split frame, the utility model can be disassembled and reduced in transportation volume, and through the positioning effect of the fixing nuts welded on the lower frame assembly, the utility model can be quickly installed and conveniently transported to different workplaces for use.

[0018] 2. The utility model adopts a hub motor with a brushless DC motor, and utilizes the characteristics of the brushless DC motor and the function of the controller. It does not need to install gears and reducers, nor does it need to cooperate with a brake system. It only needs to operate a speed wrench to provide electric power to push the cart, and loosening the speed wrench can provide resistance to stop the car. The design is simple, which not only reduces production costs but also facilitates operation.

[0019] 3. The utility model can only work by inserting the safety key and using the speed regulating wrench. When the safety key is pulled out, the speed regulating wrench does not work, thereby preventing children from causing danger by misoperation.

[0020] 4. The utility model increases the stability of the cart when the load is heavy by quickly installing an auxiliary wheel device on the split frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 It is a three-dimensional diagram of the utility model;

[0023] Figure 2 It is a side view of the utility model;

[0024] Figure 3 It is an exploded view of the frame of the utility model;

[0025] Figure 4 It is a front view of the lower frame assembly of the utility model;

[0026] Figure 5 It is a top view of the switch device of the utility model;

[0027] Figure 6 It is a bottom view of the switch device of the utility model;

[0028] Figure 7 It is a top view of the safety key of the utility model;

[0029] In the figure: 1, frame; 2, bucket; 3, hub motor; 4, power supply device; 5, switch device; 6, safety key; 7, waterproof cover; 11, lower frame assembly; 12, left handle; 13, right handle; 14, left support frame; 15, right support frame; 16, front bracket of bucket; 17, rear bracket of bucket; 18, auxiliary wheel device; 19, mounting hole; 20, fixing nut; 21, pipe plug; 22, rubber handle; 111, lower frame; 112, first cross pipe; 113, first Two horizontal tubes; 114, controller fixing plate; 115, hub motor fixing plate; 116, vertical tube; 117, left tube hole; 118, right tube hole; 181, auxiliary wheel; 182, auxiliary wheel bracket; 31, wheel hub; 32, tire; 41, waterproof cover; 42, waterproof cover fixing seat; 51, power switch; 52, gear selection key; 53, first indicator light; 54, second indicator light; 55, speed control wrench; 551, anti-slip protrusion; 61, conductive metal; 62, insulating shell. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] See also Figure 1-7 This embodiment provides a technical solution: an electric power-assisted wheelbarrow, which is composed of a frame 1, a bucket 2, a hub motor 3, a power supply device 4 and a control device. Among them, the frame 1 is a split type, including a lower frame assembly 11, a left handle 12, a right handle 13, a left support frame 14, a right support frame 15, a bucket front bracket 16, and a bucket rear bracket 17, all of which are provided with mounting holes 19, which are fixedly connected by bolts, and a fixing nut 20 is welded on some of the mounting holes 19; the left handle 12, the right handle 13, the left support frame 14, the right support frame 15, the bucket front bracket 16, and the bucket rear bracket 17 are all tubular structures. The power supply device 4 includes a mobile battery, a waterproof cover 41 and a waterproof cover fixing seat 42. The control device includes a switch device 5, a controller, a safety key 6, a safety key socket and a waterproof cover 7, wherein the safety key 6 is a plug composed of a conductive metal 61 and an insulating shell 62.

[0032] When the cart is heavily loaded, the frame 1 may be further equipped with an auxiliary wheel device 18. The auxiliary wheel device 18 includes an auxiliary wheel 181 and an auxiliary wheel bracket 182 of a tubular structure.

[0033] The lower frame assembly 11 is provided with a lower frame 111 of a three-dimensional frame structure constructed of hollow tubes. A first transverse tube 112 and a second transverse tube 113 are provided on the upper part of the lower frame 111, and a vertically fixed controller fixing plate 114 is provided on the first transverse tube 112; a hub motor fixing plate 115 is fixed on the lower part of the lower frame 111, and a bayonet is provided on the hub motor fixing plate 115 to facilitate fixing the hub motor 3; the lower frame 111 is also fixed with two symmetrical vertical tubes 116 at the fixing position of the hub motor 3 to facilitate the installation of the auxiliary wheel device 18.

[0034] The left handle 12 and the right handle 13 have the same structure, both in a zigzag shape with reduced diameters at both ends. Among the left handle 12 and the right handle 13, the left handle 12 has an installation hole 19 only at one end with a reduced diameter, while the right handle 13 has installation holes 19 at both ends with reduced diameters. Lower the end of the left handle 12 with the installation hole 19 and insert it into the left pipe hole 117 of the lower frame 111 facing the controller fixing plate 114, align the installation hole 19 with that of the lower frame 111, and fix it with a bolt passing through the installation hole 19 and the corresponding fixing nut 20; Lower the end of the right handle 13 with the same position of the installation hole 19 as that of the left handle 12 and insert it into the right pipe hole 118 of the lower frame 111 facing the controller fixing plate 114, align the installation hole 19 with that of the lower frame 111, and fix it with a bolt passing through the installation hole 19 and the corresponding fixing nut 20. There are two fixing nuts 20 respectively near the insertion positions of the left handle 12 and the right handle 13 on the lower frame 111, and they are locked with bolts to strengthen the fixation of the handles.

[0035] The left support frame 14 and the right support frame 15 are symmetric in structure, and each has two groups of installation holes 19 at one end. Insert the end with the installation hole 19 into the second cross pipe 113, insert the end without the installation hole 19 into the first cross pipe 112, align the installation holes 19 on the left support frame 14 and the right support frame 15 with the installation holes 19 of the second cross pipe 113 respectively, and fix them with bolts passing through the installation holes 19 and the corresponding fixing nuts 20; There are two fixing nuts 20 on the first cross pipe 112, and they are locked with bolts to strengthen the fixation of the left support frame 14 and the right support frame 15; Select one group of installation holes 19 on the left support frame 14 and the right support frame 15 to align with the installation holes 19 on the second cross pipe 113 for adjusting the width of the support on the ground or other working planes after installation.

[0036] The front support of the cart body 16 is in a "U" shape. Turn the "U" - shaped bottom of the front support of the cart body 16 upwards, align the two ends with the installation holes 19 horizontally penetrating the upper part of the lower frame 111 respectively, and fix them with bolts passing through the installation holes 19 and the corresponding fixing nuts 20. The rear support of the cart body 17 has an arched structure. Turn the middle arch upwards, align the installation holes 19 at both ends with the installation holes 19 in the middle of the zigzag shape of the left handle 12 and the right handle 13 respectively, and fix them with bolts and nuts.

[0037] The cart body 2 is a square cart body, with the front part higher and the rear part lower, and is provided with six installation holes 19. Among them, four at the bottom are aligned with the installation holes 19 vertically penetrating the upper part of the lower frame 111. Preferably, fix them with round - head bolts passing through the installation holes 19 of the cart body 2 and wing nuts. The surface of the round - head bolt is smooth and not easy to damage the surface of the goods, and the wing nut is convenient to tighten by hand; The front and rear installation holes 19 of the cart body 2 correspond to the installation holes 19 of the front support of the cart body 16 and the rear support of the cart body 17 respectively, and are fixed with round - head bolts and nuts.

[0038] The controller and the safety key socket are fixed on the controller fixing plate 114, covered with a waterproof cover plate 7, and screwed tightly. The waterproof cover plate 7 is provided with a socket to facilitate the safety key 6 to be inserted into the safety key socket.

[0039] A mobile battery socket is provided on the waterproof cover plate 7, and a waterproof cover fixing seat 42 is fixed on the waterproof cover plate 7 with screws and connected to the waterproof cover 41 by a spring, so as to facilitate opening the waterproof cover 41 and placing a mobile battery.

[0040] The switch device 5 is fixed through the mounting hole 19 on the right handle 13 near the reduced diameter step to prevent the switch device 5 from shifting. The switch device 5 is provided with a power switch 51, a gear selection key 52, a first indicator light 53, a second indicator light 54 and a speed regulating wrench 55 with a speed regulating function for controlling the speed of the hub motor. The speed regulating wrench 55 is provided with an anti-slip protrusion 551.

[0041] The left handle 12 and the right handle 13 are provided with rubber handles 22 for easy gripping and anti-slip.

[0042] The wheel hub motor 3 comprises a brushless DC motor, a wheel hub 31 and a tire 32. Preferably, the brushless DC motor is a waterproof motor, and the tire 32 is a solid tire, which is strong and durable.

[0043] The controller and the wheel hub motor 3 are connected by wires. Preferably, a waterproof docking plug is provided in the middle of the wires between the controller fixing plate 114 and the wheel hub motor 3 to facilitate the maintenance and replacement of the wheel hub motor 3.

[0044] The hollow pipe opening exposed on the frame 1 is provided with a pipe plug 21 for waterproofing.

[0045] Working principle:

[0046] When the cart needs to be transported, the switch device 5 can be quickly removed from the right handle 13, and the bucket 2, the left handle 12, the right handle 13, the left support frame 14, the right support frame 15, the front bracket 16 of the bucket, and the rear bracket 17 of the bucket can be removed from the lower frame assembly 11, thereby reducing the volume during transportation and facilitating carrying; when needed, the components can also be quickly positioned according to the position of the fixing nut 20, and the installation can be completed conveniently.

[0047] The auxiliary wheel device 18 is used to enhance the stability of the wheelbarrow and can be installed as needed.

[0048] This electric power-assisted wheelbarrow can transport goods on flat ground with a load capacity of up to 120 kg.

[0049] When the goods need to be transported, the mobile battery is inserted into the mobile battery socket, the safety key 6 is inserted into the safety key socket, and the power switch key 51 is pressed to turn on the machine. The first indicator light 53 is on, and the default selection is the first gear speed, with a maximum speed of three kilometers per hour. If you want to increase the speed to the second gear, press the gear selection key 52 to select the second gear speed, the second indicator light 54 is on, and the maximum speed is six kilometers per hour. Press the gear selection key 52 to switch back and forth between the first gear and the second gear. The mobile battery can be taken out for charging.

[0050] When the cart needs to be pushed forward, the left hand holds the left handle 12, and the right hand holds the right handle 13 and the speed wrench 55 at the same time, lifts the speed wrench 55, and the hub motor 3 runs to drive the cart forward; when the cart reaches the destination to be reached, only the right hand needs to release the speed wrench 55, and the speed wrench 55 automatically returns to its original position, and the hub motor 3 stops. At this time, according to the characteristics of the DC brushless motor, the controller controls the manual forward push of the cart. The resistance is very large. The higher the speed wrench 55 is lifted, the faster the hub motor 3 rotates, and the faster the cart moves forward. The user can adjust the speed according to the walking speed.

[0051] If the safety key 6 is not inserted into the safety key socket, the power switch 51 is still turned on by pressing it, but the speed wrench 55 is lifted, the cart cannot provide electric assistance, and the resistance of manual pushing is large, especially to prevent children from misoperation.

[0052] When the cart is loaded on a downhill section, the speed regulating wrench 55 may not be used, and the electric power-assisted wheelbarrow has a slope slow-down function, and can use the cart's own gravity to slowly go downhill.

[0053] When the power switch key 51 is not pressed to start the device or the mobile battery is not installed, the cart can be pushed manually like an ordinary non-electric power-assisted cart.

[0054] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An electric power-assisted wheelbarrow, comprising a frame (1), a wheel bucket (2), a wheel hub motor (3), a power supply device (4) and a control device, characterized in that: The frame (1) is of a split type, comprising a lower frame assembly (11), a left handle (12), a right handle (13), a left support frame (14), a right support frame (15), a front support frame (16) and a rear support frame (17), all of which are provided with mounting holes (19) and connected by bolts, and fixing nuts (20) are welded to some of the mounting holes (19).

2. The electric power-assisted unicycle according to claim 1, characterized in that: The lower frame assembly (11) is provided with a lower frame (111) of a three-dimensional frame structure constructed of hollow tubes; a first transverse tube (112) and a second transverse tube (113) are provided at the upper portion of the lower frame (111); a vertically fixed controller fixing plate (114) is provided on the first transverse tube (112); a wheel hub motor fixing plate (115) is fixed at the lower portion of the lower frame (111); a bayonet is provided on the wheel hub motor fixing plate (115); and two symmetrically positioned vertical tubes (116) are fixed at the lower portion of the lower frame (111).

3. The electric power-assisted wheelbarrow according to claim 2, characterized in that: The power supply device (4) comprises a mobile battery, a waterproof cover (41) and a waterproof cover fixing seat (42); the control device comprises a switch device (5), a controller and a safety key (6).

4. The electric power-assisted unicycle cart according to claim 2, characterized in that: The left handle (12), the right handle (13), the left support frame (14), the right support frame (15), the truck bed front support frame (16), and the truck bed rear support frame (17) are all tubular structures, wherein the left handle (12) is inserted into a left tube hole (117) of the lower frame (111) facing the controller fixing plate (114), the right handle (13) is inserted into a right tube hole (118) of the lower frame (111) facing the controller fixing plate (114), and the left support frame (14) and the right support frame (15) are respectively inserted into the first transverse tube (112) and the second transverse tube (113).

5. The electric power-assisted unicycle cart according to claim 2, characterized in that: The frame (1) comprises an auxiliary wheel device (18), wherein the auxiliary wheel device (18) comprises an auxiliary wheel (181) and an auxiliary wheel bracket (182), wherein the auxiliary wheel bracket (182) is a tubular structure and is connected to the vertical pipe (116) by bolts.

6. The electric power-assisted wheelbarrow according to claim 3, characterized in that: The controller fixing plate (114) is provided with a waterproof cover plate (7), the waterproof cover plate (7) is provided with a mobile battery socket, the waterproof cover fixing seat (42) is fixed on the waterproof cover plate (7), the mobile battery is inserted into the mobile battery socket, and the waterproof cover (41) is connected to the waterproof cover fixing seat (42).

7. The electric power-assisted unicycle cart according to claim 3, characterized in that: The safety key (6) is a plug composed of a conductive metal (61) and an insulating shell (62); the controller and a safety key socket for inserting the safety key (6) are provided on the controller fixing plate (114).

8. The electric power-assisted wheelbarrow according to claim 3, characterized in that: The switch device (5) is mounted on the right handle (13), and is provided with a power switch key (51), a gear selection key (52), a first indicator light (53), a second indicator light (54), and a speed regulating wrench (55).

9. The electric power-assisted wheelbarrow according to claim 8, characterized in that: The speed regulating wrench (55) is provided with an anti-slip protrusion (551).

10. The electric power-assisted unicycle cart according to claim 2, characterized in that: The wheel hub motor (3) is fixed at the bayonet of the wheel hub motor fixing plate (115), and comprises a brushless DC motor, a wheel hub (31) and a tire (32).

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