Auxiliary wheel and cart

Abstract

The invention 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 technical field of carts, and in particular to a training wheel and a cart. Background Art

[0002] As a common means of transportation for infants, strollers have gradually introduced intelligent and electric designs with the advancement of technology to improve convenience and comfort. In order to increase the pushing force, traditional power-assisted wheels generally have power-assisted motors on the wheel hubs to drive the wheels to rotate. However, the internal motors are expensive, the structure is complex, after-sales service is difficult, and the wheels are too heavy.

[0003] Therefore, it is necessary to design a training wheel and a cart that solve the above-mentioned technical problems. Summary of the invention

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

[0005] According to a first aspect of an embodiment of the present specification, there is provided an auxiliary wheel, comprising a wheel group, an auxiliary wheel group and a power supply assembly; the wheel group comprises a fork and a wheel rotating around the fork; the auxiliary wheel group is connected to the wheel group and cooperates with the rotation of the wheel; the power supply assembly is electrically connected to the auxiliary wheel group.

[0006] Furthermore, the auxiliary wheel set includes two fixing plates, a power-assisting wheel and a motor, the two fixing plates are symmetrically arranged on the left and right sides of the wheel fork, the power-assisting wheel and the motor are arranged between the two fixing plates; the motor is used to drive the power-assisting wheel to rotate in coordination with the wheel.

[0007] Furthermore, the motor is a reversible motor, the two fixing plates are fixedly connected to the wheel fork, and the wheel abuts against the power-assisted wheel.

[0008] Furthermore, the motor is a self-locking motor, and the two fixing plates are rotationally connected to the wheel fork.

[0009] Furthermore, it also includes a joint seat, a micro switch, a transmission pin, a rotating shaft, a lining and a wheel joint; the joint seat is fixed on the top of the wheel fork; the micro switch and the transmission pin are placed in the joint seat; one end of the rotating shaft is rotatably connected to the joint seat, the other end of the rotating shaft is fixed with the lining, the wheel joint is snap-connected with the lining, and a positioning pin that moves up and down is provided on the wheel joint, and the positioning pin drives the transmission pin to move up and down to open and close the micro switch.

[0010] Furthermore, it also includes an electric slip ring, which is arranged on the inner lining, 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 set.

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

[0012] According to a second aspect of an embodiment of the present specification, a cart is provided, comprising a frame and four sets of auxiliary wheels as described in the first aspect above 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 sets of auxiliary wheels are respectively mounted on the left and right ends of the front frame and the rear frame.

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

[0014] Furthermore, 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-controlled switches.

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

[0016] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the specification and, together with the description, serve to explain the principles of the specification.

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

[0019] Figure 2 is a schematic diagram of the structure of the training wheel of the present application;

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

[0021] Figure 4 It is a schematic diagram of the structure of the cart of the present application.

[0022] Description of reference numerals:

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

[0024] 20- auxiliary wheel set; 21- fixed plate; 22- power-assisting wheel; 23- motor;

[0025] 31-connector seat; 32-micro switch; 33-transmission pin; 34-rotating shaft; 35-lining; 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] Here, the technical solutions in the embodiments (or "implementations") of the present application will be described clearly and completely in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0028] If there are terms involving directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, 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 relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance.

[0029] Next, the embodiments of this specification are described in detail.

[0030] Reference Figure 1-Figure 3 As shown, 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 figure). The auxiliary wheel set 20 is connected to the wheel set 10, and the auxiliary wheel set 20 rotates in coordination with the wheel 12. The power supply assembly provides a rotational force for the auxiliary wheel set 20, and helps the wheel set 10 to move forward through the friction force or driving force generated by the auxiliary wheel set 20 and the wheel set 10.

[0031] The friction force 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 cooperation between the driving wheel and the driven wheel.

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

[0033] There are four sets of wheel groups 10 and four sets of auxiliary wheel groups 20, respectively. The wheel groups 10 and auxiliary wheel groups 20 are matched one by one, and the auxiliary wheel groups 20 are all arranged on the same side of the wheel groups 10. This configuration can evenly distribute the weight of the cart, so that the auxiliary wheel groups 20 drive the wheel groups 10 in the same direction, thereby improving the stability of the cart. In some cases, there are two sets of wheel groups 10 and two sets of auxiliary wheel groups 20, respectively.

[0034] The auxiliary wheel set 20 includes two fixing plates 21, a power-assisted 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 plates 21 gradually increases from the end away from the wheel plug.

[0035] The boost wheel 22 and the motor 23 are arranged between the two fixing plates 21 and are located at an end of the fixing plate 21 away from the wheel fork 11. The mounting area of ​​the boost wheel 22 and the motor 23 can be increased by enlarging the fixing plate 21, thereby increasing the structural stability.

[0036] The motor 23 is used to drive the power-assisted wheel 22 to rotate with the wheel 12. When the motor 23 is a reversible motor, that is, the motor 23 is a non-self-locking motor, the two fixing plates 21 are fixedly connected to the wheel fork 11, and the wheel 12 abuts against the power-assisted wheel 22, so that the auxiliary wheel set 20 will not be unable to be pushed due to lack of electricity, and the manufacturing cost is low.

[0037] In some cases, the motor 23 may also be a self-locking motor, and the two fixing plates 21 are rotatably connected to the wheel fork 11. A driving shaft is set in the wheel fork 11, and the fixing plates 21 are rotated after power is turned on to make the power-assisting wheel 22 contact the wheel 12. After power is turned off, the fixing plates 21 are rotated in the opposite direction to separate the power-assisting wheel 22 from the wheel 12, so as to prevent the power-assisting wheel 22 from being unable to rotate due to lack of electricity, thereby blocking the normal operation of the wheel 12.

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

[0039] The auxiliary wheel also includes 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 includes a lower joint seat and an upper joint seat connected to each other, and a shock absorbing spring is arranged between the lower joint seat and the upper joint seat. The lower joint seat is fixed in the groove at the top of the wheel fork 11 and is flush with the top of the wheel fork 11. The micro switch 32 and the transmission pin 33 are placed in the lower joint seat, and the transmission pin 33 is used to open and close the micro switch 32.

[0040] The rotating shaft 34 is a hollow shaft, one end of which is rotatably connected to the joint seat 31, and the other end of which is fixed with an inner lining 35. When turning, 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 cart, and the auxiliary wheel is installed on the cart by engaging with the inner lining 35. The wheel joint 36 is provided with a positioning pin 37 that moves up and down. The positioning pin 37 and the transmission pin 33 are located on the same axis in the vertical direction. 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 be moved up and down by 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 to the power supply assembly, and the other end of the electric slip ring 38 is electrically connected to the auxiliary wheel set 20. The electric slip ring 38 includes a rotating part and a fixed part, and the transmission of current or signal is realized by the rotating part rotating around the fixed part.

[0043] The present application can prevent the wiring harness from being entangled when the wheel set rotates by setting an electric slip ring 38 between the power supply assembly and the auxiliary wheel. At the same time, whether the positioning pin 37 can push the transmission pin 33 and then start the electric slip ring 38 to verify whether the auxiliary wheel is installed in place, providing more precise control.

[0044] In this application, the rear wheel drive realizes straight driving, and the front wheel drive realizes turning. In some cases, the turning can also be realized by the rear wheel drive, and the front wheel drive realizes straight driving. The straight driving or turning of the front and rear wheels is related to the rotation speed of the motor 23.

[0045] The present application simplifies the structure of the wheel 12 by adding an auxiliary wheel set 20 outside the wheel 12, thereby reducing the weight of the wheel 12, reducing the manufacturing cost and facilitating maintenance. At the same time, after the auxiliary wheel set 20 is powered on, the auxiliary wheel set 20 assists the wheel 12 in moving forward by rotating and generating friction or driving force with the wheel 12, thereby reducing the pushing force of the cart.

[0046] Combined with reference Figure 4As shown, the present application also discloses a cart, which includes a frame 40, four sets of auxiliary wheels connected to the frame 40, and two gyroscopes (not shown in the figure). The frame 40 includes 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 the friction between the left and right wheels 12 and the power-assisted wheel 22, controlling the rotation speed of the motors 23 on both sides, and keeping the cart balanced when moving forward.

[0048] 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 41 and electrically connected to the front wheel switch, and the rear wheel power supply is arranged on the rear frame 42 and electrically connected to the rear wheel switch. In some cases, the front wheel power supply and the rear wheel power supply are arranged on a connecting rod between the wheels 12, thereby strengthening the weight of the bottom of the cart and making the cart 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-activated switches, but the premise is that the push handle needs to be held by hand to start, which improves safety.

[0050] Since each wheel 12 in the present application is independently equipped with an auxiliary wheel set 20, and each auxiliary wheel set 20 can be independently controlled to open, independent power assistance is achieved. Therefore, 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 causing conflicts. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A training wheel, characterized in that: It 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 cooperates with the wheel in rotation; the power supply assembly is electrically connected to the auxiliary wheel set.

2. The training wheel according to claim 1, characterized in that: The auxiliary wheel set includes two fixing plates, a power-assisting wheel and a motor. The two fixing plates are symmetrically arranged on the left and right sides of the wheel fork. The power-assisting wheel and the motor are arranged between the two fixing plates. The motor is used to drive the power-assisting wheel to rotate in coordination with the wheel.

3. The training wheel according to claim 2, characterized in that: The motor is a reversible motor, the two fixing plates are fixedly connected to the wheel fork, and the wheel abuts against the power-assisted wheel.

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

5. The training wheel according to claim 1, characterized in that: It also includes a joint seat, a micro switch, a transmission pin, a rotating shaft, a lining and a wheel joint; the joint seat is fixed on the top of the wheel fork; the micro switch and the transmission pin are placed in the joint seat; one end of the rotating shaft is rotatably connected to the joint seat, the other end of the rotating shaft is fixed with the lining, the wheel joint is snap-connected with the lining, and a positioning pin that moves up and down is provided on the wheel joint, and the positioning pin drives the transmission pin to move up and down to open and close the micro switch.

6. The training wheel according to claim 5, characterized in that: It also includes an electric slip ring, which is arranged on the inner lining, 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 set.

7. The training wheel according to claim 6, characterized in that: The wheel group and the auxiliary wheel group are respectively provided with four groups, and the four auxiliary wheel groups are arranged on the same side of the wheel group.

8. A cart, characterized in that: The bicycle comprises a frame and four groups of auxiliary wheels as described in any one of claims 1 to 7 connected to the frame, wherein 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 auxiliary wheels are respectively mounted on the left and right ends of the front frame and the rear frame.

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

10. The cart 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, and 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-controlled switches.

Images