Gear box for electric baby carriage

Abstract

The invention discloses a gearbox for an electric baby carriage, which comprises a shell, an input gear set, an intermediate gear set and an output gear set, and the input gear set, the intermediate gear set and the output gear set are respectively and rotatably connected with the shell through a central shaft; the shell comprises a bottom plate and a protective shell which form a gear mounting cavity; the planetary gear set and the parallel shaft gear set are combined, multi-stage speed reduction or speed increase is achieved through different gear diameter proportions, the output rotating speed and torque can be flexibly adjusted, and the requirements of the baby carriage on flat road surfaces and complex road conditions are met; under the same power, through gear combination adjustment, the output torque can be obviously increased at a low gear, and the climbing ability of the baby carriage is improved; the high-speed gear can improve the driving speed, and practicability and interestingness are both considered.

Description

Technical Field

[0001] The invention relates to the technical field of gear boxes, and in particular to a gear box for an electric baby carriage. Background Art

[0002] With the diversification of functions of children's electric vehicles, users have put forward higher requirements on the speed changing ability, torque output, noise control and durability of gearboxes; traditional electric baby stroller gearboxes mostly adopt single-stage gear transmission or simple worm gear structure, which has the following problems: fixed transmission ratio, unable to adjust speed and torque according to road conditions, weak climbing ability, poor adaptability to complex scenes; worm gear transmission efficiency is low, and the noise is large, and it wears quickly after long-term use; therefore, designing a reliable gearbox for electric baby strollers is an issue that technical personnel in related fields urgently need to solve. Summary of the invention

[0003] In order to solve the above technical problems, the technical solution provided by the present invention is: a gear box for an electric baby stroller, comprising a shell, an input gear set, an intermediate gear set and an output gear set, wherein the input gear set, the intermediate gear set and the output gear set are rotatably connected to the shell through a center shaft respectively; the shell comprises a bottom plate and a protective shell constituting a gear mounting cavity; the input gear set is transmission-connected to the output shaft of the input motor for inputting power; the intermediate gear set is transmission-connected to the input gear set and the output gear set for transmitting power to the output gear set; the output gear set is connected to a wheel mounting member for transmission-connecting to the wheel assembly of the electric baby stroller through the wheel mounting member, so as to output power to the wheel assembly of the electric baby stroller.

[0004] Furthermore, the input gear group includes a central gear, which is connected to the output shaft of the input motor, and a plurality of planetary gears are meshed on the outer circumference of the central gear, and an internal gear is meshed on the outer circumference of the planetary gears, and a transmission gear 1 coaxially arranged with the central gear is fixed on the other side of the internal gear, and the transmission gear 1 is meshed with the intermediate gear group.

[0005] Furthermore, the diameter of the transmission gear 1 is smaller than the diameter of the internal gear.

[0006] Furthermore, the intermediate gear set includes a transmission gear 2 meshing with a transmission gear 1, a coaxially arranged transmission gear 3 is fixed to a side of the transmission gear 2 away from the input gear set, and the transmission gear 3 meshes with the output gear set.

[0007] Furthermore, the diameter of the transmission gear three is smaller than the diameter of the transmission gear two.

[0008] Furthermore, the intermediate gear set is a set of transmission gear 2 and transmission gear 3, or a plurality of sets of gears meshing in sequence, transmission gear 2 and transmission gear 3.

[0009] Further, the output gear set includes an output gear meshing with the third transmission gear, and the wheel mount is disposed outside the housing and connected to the central axis of the output gear set.

[0010] Further, on one side of the housing where the input gear set is located, there is also an annular motor mount for fixing the input motor.

[0011] The advantages of the present invention compared with the prior art are as follows:

[0012] The present invention combines a planetary gear set and a parallel shaft gear set, and realizes multi-stage speed reduction or speed increase through different gear diameter ratios, and can flexibly adjust the output speed and torque to meet the requirements of the baby carriage on flat roads and complex road conditions; under the same power, through the adjustment of the gear combination, the output torque can be significantly increased in the low gear to improve the climbing ability of the baby carriage; the high gear can increase the driving speed, taking into account both practicality and fun; in the present invention, multiple planetary gears evenly share the load, reduce the force on a single tooth, and reduce the meshing impact and noise; the housing is composed of a bottom plate and a protective shell to form a closed cavity, protecting the gear set from dust and moisture, and extending the service life. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of the inner side of a gearbox for an electric baby carriage according to the present invention.

[0014] Figure 2 is a schematic structural diagram of the outer side of a gearbox for an electric baby carriage according to the present invention.

[0015] Figure 3 is a schematic structural diagram of the input gear set in a gearbox for an electric baby carriage according to the present invention.

[0016] Figure 4 is a schematic structural diagram of the output gear set in a gearbox for an electric baby carriage according to the present invention. Detailed Embodiments

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. Generally, the components of the embodiments of the present invention described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0018] In the description of the embodiments of the present invention, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed during use. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, terms such as "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0019] In addition, if terms such as "horizontal", "vertical", "hanging" are used, it does not mean that the component is required to be absolutely horizontal or hanging, but it can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0020] In the description of the embodiments of the present invention, "a plurality of" represents at least two.

[0021] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "installed", "connected", "coupled" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0022] Embodiment:

[0023] Combined with the attached Figures 1-4 , this embodiment discloses a gearbox for an electric children's vehicle, which includes a housing 1, an input gear set 2, an intermediate gear set 3, and an output gear set 4. The input gear set 2, the intermediate gear set 3, and the output gear set 4 are respectively rotatably connected to the housing 1 through a central shaft; the housing 1 includes a bottom plate 101 and a protective shell 102 that form a gear installation cavity; the input gear set 2 is in transmission connection with the output shaft of the input motor for inputting power; the intermediate gear set 3 is in transmission connection with the input gear set 2 and the output gear set 4 for delivering power to the output gear set 4; the output gear set 4 is connected to a wheel mounting member 5 for drivingly connecting with the wheel assembly of the electric children's vehicle through the wheel mounting member 5 and outputting power to the wheel assembly of the electric children's vehicle.

[0024] The input gear set 2 includes a central gear 201, which is connected to the output shaft of the input motor. A plurality of planetary gears 202 are circumferentially meshed with the outer periphery of the central gear 201. The planetary gears 202 are externally meshed with an internal gear 203. On the other side of the internal gear 203, a transmission gear one 204 coaxially arranged with the central gear 201 is fixed. The transmission gear one 204 meshes with the intermediate gear set 3; the diameter of the transmission gear one 204 is smaller than the diameter of the internal gear 203.

[0025] The intermediate gear set 3 includes a transmission gear two 301 meshing with the transmission gear one 204. On the side of the transmission gear two 301 away from the input gear set 2, a transmission gear three 302 coaxially arranged is fixed. The transmission gear three 302 meshes with the output gear set 4; the diameter of the transmission gear three 302 is smaller than the diameter of the transmission gear two 301. In addition, the intermediate gear set 3 is a set of transmission gear two 301 and transmission gear three 302, or multiple sets of gears of transmission gear two 301 and transmission gear three 302 meshing in sequence; in this embodiment, the intermediate gear set 3 is two sets of transmission gear two 301 and transmission gear three 302 meshing and transmitting power;

[0026] The output gear set 4 includes an output gear 401 meshing with the transmission gear three 302. A wheel mounting member 5 is arranged outside the housing 1 and is connected to the central axis of the output gear set 4; on one side of the housing 1 where the input gear set 2 is located, an annular motor seat 6 for fixing the input motor is also arranged.

[0027] In this embodiment, the internal gear 203, the transmission gear one 204, the transmission gear two 301, the transmission gear three 302, and the output gear 4 are only simplifiedly represented by rings and cylinders to show their positions and meshing states, and they are all gear structures.

[0028] During specific implementation:

[0029] (1) Power input stage:

[0030] The output shaft of the input motor is coaxially connected to the central gear 201 of the input gear set 2. After the motor starts, the central gear 201 begins to rotate; a plurality of planetary gears 202 are evenly meshed circumferentially with the outer periphery of the central gear 201. Driven by the central gear 201, the planetary gears 202 rotate around their own axes and revolve along the inner wall of the internal gear 203; since the planetary gears 202 are externally meshed with the internal gear 203, the internal gear 203 is driven to rotate by the planetary gears 202, and the transmission gear one 204 fixed on the other side of the internal gear 203 rotates synchronously with the internal gear 203, completing the first-stage speed reduction and torque increase;

[0031] (2) Intermediate gear transmission stage:

[0032] The first transmission gear 204 meshes with the second transmission gear 301 of the intermediate gear set 3 to transmit power to the second transmission gear 301. The second transmission gear 301 is coaxially fixed with the third transmission gear 302. Therefore, the third transmission gear 302 rotates synchronously with the second transmission gear 301. The intermediate gear set 3 can be set as multiple sets of sequentially meshing gears, so that the rotational speed and torque can be further adjusted through multi-stage gear transmission.

[0033] (3) Power output stage:

[0034] The third transmission gear 302 meshes with the output gear 401 of the output gear set 4 to drive the output gear 401 to rotate. The central axis of the output gear 401 extends outside the housing 1 and is connected to the wheel mounting member 5, and finally the power is transmitted to the wheel assembly of the electric baby carriage to drive the wheels to rotate.

[0035] In this embodiment, by using a combination of gears of different sizes, speed change is achieved by changing the gear combination and ratio, the transmission direction of force can be changed, and the force can be vertically transmitted from one direction to another rotating shaft. Also, at the same power, the torque on the shaft can be changed by adjusting the rotational speed of the gears. According to the driving requirements of the baby carriage, acceleration or deceleration can be achieved through different gear combinations. For example, the high gear can be used on flat ground, and the low gear can be used when climbing slopes or crossing obstacles to increase the torque.

[0036] The standard parts used in the present invention can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art. In addition, the circuit connection adopts the conventional connection method in the prior art, which will not be elaborated here. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0037] The above describes the present invention and its embodiments. This description is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Generally speaking, if those skilled in the art are inspired by it and design similar structural modes and embodiments without creative work without departing from the purpose of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. An electric children's vehicle gearbox, characterized in that, It includes a shell, an input gear set, an intermediate gear set and an output gear set, and the input gear set, the intermediate gear set and the output gear set are respectively rotatably connected to the shell through a central shaft; the shell includes a bottom plate and a protective shell that constitute a gear mounting cavity; the input gear set is transmission-connected to the output shaft of the input motor for inputting power; the intermediate gear set is transmission-connected to the input gear set and the output gear set for transmitting power to the output gear set; the output gear set is connected to the wheel mounting member, and is transmission-connected to the wheel assembly of the electric baby stroller through the wheel mounting member, so as to output power to the wheel assembly of the electric baby stroller.

2. The gearbox for an electric children's vehicle according to claim 1, characterized in that, The input gear set includes a central gear, which is connected to the output shaft of the input motor. A plurality of planetary gears are meshed on the outer circumference of the central gear. An internal gear is meshed on the outer circumference of the planetary gears. A transmission gear 1 coaxially arranged with the central gear is fixed on the other side of the internal gear, and the transmission gear 1 is meshed with the intermediate gear set.

3. The gearbox for an electric children's vehicle according to claim 2, characterized in that, The diameter of the transmission gear 1 is smaller than the diameter of the internal gear.

4. A gearbox for an electric children's vehicle according to claim 2, wherein, The intermediate gear set includes a transmission gear 2 meshing with a transmission gear 1, a coaxially arranged transmission gear 3 is fixed to a side of the transmission gear 2 away from the input gear set, and the transmission gear 3 meshes with the output gear set.

5. The gearbox for an electric children's vehicle according to claim 4, characterized in that, The diameter of the transmission gear three is smaller than the diameter of the transmission gear two.

6. The gearbox for an electric children's vehicle according to claim 1, wherein The intermediate gear set is a set of transmission gear 2 and transmission gear 3, or multiple sets of gears that are meshed in sequence, transmission gear 2 and transmission gear 3.

7. The gearbox for an electric baby carriage according to claim 1, wherein, The output gear set includes an output gear that is three-meshed with the transmission gear, and the wheel mounting member is arranged outside the housing and connected to the central axis of the output gear set.

8. A gearbox for an electric children's vehicle according to claim 1, characterized in that, The housing is also provided with an annular motor seat for fixing the input motor on one side of the input gear set.

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