Auxiliary wheel and cart

Abstract

The utility model provides an auxiliary wheel and a cart. The auxiliary wheel comprises a wheel set, an auxiliary wheel set and a power supply assembly. The wheel set comprises a wheel fork and a wheel rotating around the wheel fork. The auxiliary wheel set is connected to the wheel set and is in running fit with the wheels. The power supply assembly is electrically connected with the auxiliary wheel set. The auxiliary wheel set is additionally arranged on the wheel, the wheel structure is simplified, the weight of the wheel is reduced, the manufacturing cost is low, and maintenance is convenient. Meanwhile, after the power supply assembly is powered on, the auxiliary wheel sets assist the wheels to move forwards through friction force or driving force generated by rotation and the wheels, and the pushing force of the cart is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of stroller technology, in particular to an auxiliary wheel and a stroller. BACKGROUND

[0002] As a common baby travel tool, the stroller gradually introduces intelligent and electric design with the progress of science and technology to improve the convenience and comfort of use. In order to increase the pushing force, the traditional auxiliary wheel generally sets a power motor on the hub to drive the wheel to rotate, but the internal motor has high cost, complex structure, difficult after-sales, and heavy wheel weight.

[0003] Therefore, it is necessary to design an auxiliary wheel and a stroller to solve the above technical problems. CONTENT OF THE INVENTION

[0004] The present application provides an auxiliary wheel and a stroller, which can reduce the pushing force and simplify the wheel structure.

[0005] According to a first aspect of the embodiments of the present application, an auxiliary wheel is provided, comprising a wheel set, an auxiliary wheel set and a power supply assembly; the wheel set comprises a wheel fork and a wheel rotating around the wheel fork; the auxiliary wheel set is connected to the wheel set and rotates with the wheel; the power supply assembly is electrically connected to the auxiliary wheel set.

[0006] Further, the auxiliary wheel set comprises two fixing plates, an auxiliary wheel and a motor, the two fixing plates are symmetrically arranged on the left and right sides of the wheel fork, and the auxiliary wheel and the motor are arranged between the two fixing plates; the motor is used to drive the auxiliary wheel to rotate with the wheel.

[0007] Further, the motor is a reversible motor, the two fixing plates are fixedly connected with the wheel fork, and the wheel abuts against the auxiliary wheel.

[0008] Further, the motor is a self-locking motor, and the two fixing plates are rotatably connected with the wheel fork.

[0009] Further, it further comprises a joint seat, a micro switch, a transmission pin, a rotating shaft, an inner liner and a wheel joint; the joint seat is fixed on the top of the wheel fork; the micro switch and the transmission pin are arranged in the joint seat; one end of the rotating shaft is rotatably connected with the joint seat, and the other end of the rotating shaft is fixed with the inner liner; the wheel joint is hingedly connected with the inner liner, and the wheel joint is provided with a positioning pin moving up and down; the positioning pin drives the transmission pin to move up and down to open and close the micro switch.

[0010] Further, an electric slip ring is arranged on the inner liner, one end of the electric slip ring is electrically connected with the power supply assembly, and the other end of the electric slip ring is electrically connected with the auxiliary wheel set.

[0011] Further, the wheel set and the auxiliary wheel set are respectively provided with four groups, and the four groups of the auxiliary wheel set are arranged on the same side of the wheel set.

[0012] According to a second aspect of the embodiments of the present application, a cart is provided, comprising a frame and four groups of the auxiliary wheel of the first aspect of the present application connected to the frame; the frame comprises a front frame, a rear frame and a push rod rotatably connected between the front frame and the rear frame, and the four groups of the auxiliary wheel are respectively arranged at the left and right ends of the front frame and the rear frame.

[0013] Further, two gyroscopes are arranged in the middle of the front frame and the rear frame.

[0014] Further, the power supply assembly comprises a front wheel power supply, a rear wheel power supply, a front wheel switch and a rear wheel switch, the front wheel power supply is arranged on the front frame and is electrically connected with the front wheel switch, the rear wheel power supply is arranged on the rear frame and is electrically connected with the rear wheel switch; the front wheel switch and the rear wheel switch are arranged on the push rod; the front wheel switch and the rear wheel switch are key switches or voice control switches.

[0015] The present application has the following beneficial effects: by increasing the auxiliary wheel set on the wheel, the structure of the wheel is simplified, the weight of the wheel is reduced, the manufacturing cost is low and the maintenance is convenient. At the same time, after the power supply assembly is powered on, the auxiliary wheel set assists the wheel to move forward through the friction or driving force generated by the rotation of the auxiliary wheel set, thereby reducing the pushing force of the cart.

[0016] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings incorporated into the specification and forming a part thereof, illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the present application.

[0018] Figure 1 is a partial exploded view of the auxiliary wheel of the present application;

[0019] Figure 2 is a structural schematic view of the auxiliary wheel of the present application;

[0020] Figure 3 is a side view of the auxiliary wheel of the present application;

[0021] Figure 4 is a structural schematic diagram of the stroller of the present application.

[0022] Legend:

[0023] 10 - wheel set; 11 - fork; 12 - wheel;

[0024] 20 - auxiliary wheel set; 21 - fixing plate; 22 - auxiliary wheel; 23 - motor;

[0025] 31 - joint seat; 32 - micro switch; 33 - transmission pin; 34 - rotating shaft; 35 - inner liner; 36 - wheel joint; 37 - positioning pin; 38 - electric slip ring;

[0026] 40 - frame; 41 - front frame; 42 - rear frame; 43 - push rod. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments (or modes of implementation) of the present application will be described clearly and completely in conjunction with the accompanying drawings. In the following description, the same numerals in different drawings represent the same or similar elements unless otherwise indicated.

[0028] If the present application embodiments involve directional indications or positional relationships (such as up, down, left, right, front, back, inner, outer, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships, movement conditions, etc. between components in a certain posture (as shown in the drawings); if the certain posture changes, the directional indications or positional relationships also change accordingly. In addition, the terms "first", "second", etc. in the present application embodiments are only used for convenience of description, and cannot be understood as indicating or implying relative importance.

[0029] Next, the embodiments of the present application will be described in detail.

[0030] Referring to Figures 1-3 the accompanying drawings, the present application discloses an auxiliary wheel, which includes a wheel set 10, an auxiliary wheel set 20, and a power supply assembly (not shown in the drawings). The auxiliary wheel set 20 is connected to the wheel set 10, and the auxiliary wheel set 20 is rotationally matched with the wheel 12. The power supply assembly provides rotation force for the auxiliary wheel set 20, and helps the wheel set 10 to move forward through the friction or driving force generated by the auxiliary wheel set 20 and the wheel set 10.

[0031] The friction mentioned here is generated by the contact between the auxiliary wheel set 20 and the wheel set 10. The driving force is generated by the mutual engagement between the auxiliary wheel set 20 and the wheel set 10, such as the transmission matching between the driving wheel and the driven wheel.

[0032] The wheel set 10 comprises a wheel fork 11 and a wheel 12. The lower end of the wheel fork 11 is rotationally connected with the wheel 12, and the upper end of the wheel fork 11 is connected with an auxiliary wheel set 20 and a power supply assembly.

[0033] The wheel set 10 and the auxiliary wheel set 20 are respectively provided with four sets, the wheel set 10 and the auxiliary wheel set 20 are matched one by one, and the auxiliary wheel set 20 is arranged on the same side of the wheel set 10. This configuration can uniformly distribute the weight of the stroller, drive the wheel set 10 in the same direction by the auxiliary wheel set 20, and improve the stability of the stroller. In some cases, the wheel set 10 and the auxiliary wheel set 20 are respectively provided with two sets.

[0034] The auxiliary wheel set 20 comprises two fixing plates 21, a booster wheel 22 and a motor 23. The two fixing plates 21 are symmetrically arranged on the left and right sides of the wheel fork 11, and the width of the fixing plate 21 gradually increases from the end away from the wheel fork 11.

[0035] The booster wheel 22 and the motor 23 are arranged between the two fixing plates 21 and at the end of the fixing plate 21 away from the wheel fork 11. The increased fixing plate 21 can increase the installation area of the booster wheel 22 and the motor 23, and increase the structural stability.

[0036] The motor 23 is used to drive the booster wheel 22 to rotationally cooperate with the wheel 12. When the motor 23 is a reversible motor, i.e. the motor 23 is a non-self-locking motor, the two fixing plates 21 are fixedly connected with the wheel fork 11, the wheel 12 abuts against the booster wheel 22, and thus the auxiliary wheel set 20 cannot be pushed due to no power, and the manufacturing cost is relatively low.

[0037] In some cases, the motor 23 can also be a self-locking motor, and the two fixing plates 21 are rotationally connected with the wheel fork 11. A drive shaft is arranged in the wheel fork 11. After being powered, the fixing plate 21 is rotated to make the booster wheel 22 contact the wheel 12. After being powered off, the fixing plate 21 is reversely rotated to separate the booster wheel 22 from the wheel 12, so as to avoid that the booster wheel 22 cannot rotate due to no power, and thus the normal operation of the wheel 12 is blocked.

[0038] When the motor 23 is a self-locking motor, in order to improve the stability of the wheel 12 and the booster wheel 22 in the separated state, a tension spring can be arranged between the wheel fork 11 and the auxiliary wheel set 20. In the separated state of the wheel 12 and the booster wheel 22, the tension spring is in a normal elongation state. In some cases, a magnet can be arranged between the wheel fork 11 and the auxiliary wheel set 20. In the contact state of the wheel 12 and the booster wheel 22, the magnet is in an adsorption state.

[0039] The auxiliary wheel further comprises a joint seat 31, a micro switch 32, a transmission pin 33, a rotating shaft 34, an inner lining 35, a wheel joint 36, a positioning pin 37 and an electric slip ring 38. The joint seat 31 comprises a lower joint seat and an upper joint seat connected with each other, and a damping spring is arranged between the lower joint seat and the upper joint seat. The lower joint seat is fixed in a groove at the top of the wheel fork 11 and flush with the top of the wheel fork 11, the micro switch 32 and the transmission pin 33 are arranged in the lower joint seat, and the transmission pin 33 is used for opening and closing the micro switch 32.

[0040] The rotating shaft 34 is a hollow shaft, one end of the rotating shaft 34 is rotationally connected with the joint seat 31, and the other end of the rotating shaft 34 is fixed with the inner lining 35. When steering, the rotating shaft 34 drives the wheel set 10 and the joint seat 31 to rotate.

[0041] The wheel joint 36 is fixed at the bottom end of the stroller, and the wheel joint 36 is connected with the inner lining 35 through clamping to realize the installation of the auxiliary wheel and the stroller. The wheel joint 36 is provided with the positioning pin 37 moving up and down, the positioning pin 37 and the transmission pin 33 are located on the same axis in the vertical direction, and the positioning pin 37 drives the transmission pin 33 to move up and down to open and close the micro switch 32. The positioning pin 37 can move up and down through a lever.

[0042] The electric slip ring 38 is arranged on the inner lining 35, one end of the electric slip ring 38 is electrically connected with the power assembly, and the other end of the electric slip ring 38 is electrically connected with the auxiliary wheel set 20. The electric slip ring 38 comprises a rotating part and a fixed part, and the rotating part rotates around the fixed part to realize the transmission of current or signal.

[0043] The application can prevent the wire harness from being wound when the wheel set rotates by arranging the electric slip ring 38 between the power assembly and the auxiliary wheel. Whether the positioning pin 37 can push the transmission pin 33, and then start the electric slip ring 38, can verify whether the auxiliary wheel is installed in place, and provide more precise control.

[0044] In the application, the rear wheels are driven to realize straight driving, and the front wheels are driven to realize steering. In some cases, the rear wheels can also be used to realize steering, and the front wheels can be used to realize straight driving. The straight driving or steering of the front wheels and the rear wheels is related to the rotating speed of the motor 23.

[0045] The application simplifies the structure of the wheel 12 by adding the auxiliary wheel set 20 outside the wheel 12, reduces the weight of the wheel 12, has low manufacturing cost and is convenient to maintain. At the same time, after the power assembly is powered on, the auxiliary wheel set 20 assists the wheel 12 to move forward through the friction or driving force generated by the rotation of the auxiliary wheel set 20 and the wheel 12, thereby reducing the pushing force of the stroller.

[0046] In combination with reference Figure 4As shown, the application also discloses a stroller, which comprises a frame 40, four sets of auxiliary wheels connected to the frame 40 and two gyroscopes (not shown in the figure). The frame 40 comprises a front frame 41, a rear frame 42 and a push rod 43 rotatably connected between the front frame 41 and the rear frame 42, and the four sets of auxiliary wheels are respectively installed at the left and right ends of the front frame 41 and the rear frame 42.

[0047] The two gyroscopes are respectively arranged in the middle of the front frame 41 and the rear frame 42, thereby avoiding the error of friction force between the left and right wheels 12 and the auxiliary wheels 22, controlling the rotation speed of the two motors 23 and keeping the stroller balanced when moving forward.

[0048] The power supply assembly comprises a front wheel power supply, a rear wheel power supply, a front wheel switch and a rear wheel switch. The front wheel power supply is arranged on the front frame 41 and electrically connected with the front wheel switch, and the rear wheel power supply is arranged on the rear frame 42 and electrically connected with the rear wheel switch. In some cases, the front wheel power supply and the rear wheel power supply are arranged on the connecting rod between the wheels 12, thereby strengthening the weight of the bottom of the stroller and making the stroller run more smoothly.

[0049] The front wheel switch and the rear wheel switch are arranged on the push rod 43. The front wheel switch and the rear wheel switch are key switches. In some cases, the front wheel switch and the rear wheel switch are voice control switches, but the premise is that the push handle needs to be held to start, thereby improving safety.

[0050] Since each wheel 12 in the application is separately configured with an auxiliary wheel set 20, and each auxiliary wheel set 20 can be independently controlled to start, independent assistance is realized. When the push rod 43 rotates and changes direction, the working state of each auxiliary wheel set 20 can be flexibly adjusted according to the change of direction of the push rod 43.

[0051] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of the application is not limited to the precise structures described in the above embodiments and shown in the drawings; any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application shall be included in the scope of protection of the application.

Claims

1. An auxiliary wheel, characterized in that, It includes a wheel assembly, an auxiliary wheel assembly, and a power supply assembly; the wheel assembly includes a fork and a wheel that rotates around the fork; the auxiliary wheel assembly is connected to the wheel assembly and rotates in cooperation with the wheel; the power supply assembly is electrically connected to the auxiliary wheel assembly.

2. The auxiliary wheel according to claim 1, characterized in that, The auxiliary wheel assembly includes two fixed plates, a booster wheel, and a motor. The two fixed plates are symmetrically arranged on the left and right sides of the wheel fork, and the booster wheel and the motor are disposed between the two fixed plates. The motor is used to drive the booster wheel to rotate in coordination with the wheel.

3. The auxiliary wheel according to claim 2, characterized in that, The motor is a reversible motor, the two fixed plates are fixedly connected to the wheel fork, and the wheel abuts against the booster wheel.

4. The auxiliary wheel according to claim 2, characterized in that, The motor is a self-locking motor, and the two fixed plates are rotatably connected to the wheel fork.

5. The auxiliary wheel according to claim 1, characterized in that, It also includes a connector seat, a micro switch, a transmission pin, a rotating shaft, an inner liner, and a wheel joint; the connector seat is fixed to the top of the wheel fork; the micro switch and the transmission pin are placed inside the connector seat; one end of the rotating shaft is rotatably connected to the connector seat, the other end of the rotating shaft is fixed to the inner liner, the wheel joint is engaged with the inner liner, and the wheel joint is provided with a positioning pin that moves up and down, the positioning pin driving the transmission pin to move up and down to open and close the micro switch.

6. The auxiliary wheel according to claim 5, characterized in that, It also includes an electric slip ring, which is disposed on the inner liner. One end of the electric slip ring is electrically connected to the power supply assembly, and the other end of the electric slip ring is electrically connected to the auxiliary wheel assembly.

7. The auxiliary wheel according to claim 6, characterized in that, The wheel set and the auxiliary wheel set are each provided in four sets, and the four sets of auxiliary wheel sets are located on the same side of the wheel set.

8. A trolley, characterized in that, The vehicle includes a frame and four sets of auxiliary wheels as described in any one of claims 1-7 connected to the frame. The frame includes a front frame, a rear frame, and a push rod rotatably connected between the front frame and the rear frame. The four sets of auxiliary wheels are respectively installed at the left and right ends of the front frame and the rear frame.

9. The trolley according to claim 8, characterized in that, It also includes two gyroscopes, which are respectively arranged in the middle of the front frame and the rear frame.

10. The trolley according to claim 8, characterized in that, The power supply assembly includes a front wheel power supply, a rear wheel power supply, a front wheel switch, and a rear wheel switch. The front wheel power supply is arranged on the front frame and electrically connected to the front wheel switch. The rear wheel power supply is arranged on the rear frame and electrically connected to the rear wheel switch. The front wheel switch and the rear wheel switch are arranged on the push rod. The front wheel switch and the rear wheel switch are push button switches or voice-activated switches.

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