CN222910731U - Planet carrier mounting structure - Google Patents

Abstract

The utility model discloses a planet carrier mounting structure which comprises a transmission shaft and a planet carrier, wherein a first platform and a second platform which are of cylindrical structures are arranged on the transmission shaft, the first platform and the second platform are adjacently arranged, the diameter of the first platform is larger than that of the second platform, a blocking surface is formed at the junction of the first platform and the second platform, the planet carrier is arranged on the second platform of the transmission shaft, one end of the planet carrier is abutted to the blocking surface, and the transmission shaft is connected with the planet carrier through a key. Through the structural improvement of the transmission shaft, one side of the planet carrier forms an upward-raised blocking surface, and the planet carrier is stabilized under the actions of blocking and positioning and key connection of the blocking surface and the planet carrier, so that the application of snap springs is reduced in technology.

Description

Planet carrier mounting structure

Technical Field

The utility model belongs to the field of hub motors, and relates to a planet carrier mounting structure.

Background

The hub motor is one of the core components of the booster bicycle, and the transmission system of the hub motor usually adopts a mode of matching gears with shafts to realize power transmission. The planetary gear is arranged on the planetary frame and matched with the sun gear to jointly complete a complex transmission process. The planet carrier is itself mounted on the drive shaft.

However, in the existing structural design of the hub motor, there are some areas to be improved. In particular, in the link that the planet carrier is arranged on the transmission shaft, a clamp spring is required to be arranged for fixing and positioning at present. This design, while ensuring a stable mounting of the planet carrier to some extent, makes the overall structure relatively complex.

This complex structure presents a series of problems. Firstly, the snap spring is installed, so that the whole structure is relatively complex, and the difficulty and cost of production and manufacture are increased. In the installation process, accurate operation is required to ensure that the snap springs are installed in place, otherwise, the performance and reliability of the motor can be affected. Second, the complex structure increases the difficulty of maintenance and repair, requiring more time and effort to disassemble and repair once a failure occurs.

Accordingly, there is a need for improvements in the art that overcome the shortcomings of the prior art.

Disclosure of utility model

The utility model aims to provide a planet carrier mounting structure which solves the technical problems in the background art through structural improvement.

The utility model aims at realizing the following technical scheme:

The utility model provides a planet carrier mounting structure, includes transmission shaft and planet carrier, be provided with cylindrical structure's first platform and second platform on the transmission shaft, the diameter of first platform and second platform adjacent setting and first platform is greater than the second platform, the junction of first platform and second platform forms blocks the face, the planet carrier sets up on the second platform of transmission shaft and its one end butt to block the face, the key-type joint between transmission shaft and the planet carrier.

As a further improvement of an embodiment of the present utility model, a key pin groove is provided on the second platform, a notch corresponding to the key pin groove is provided on the planet carrier, and a key pin is provided between the key pin groove and the notch.

As a further improvement of an embodiment of the utility model, one end of the key pin groove abuts against the blocking surface.

As a further improvement of an embodiment of the present utility model, the number of the key pin grooves is two, and the key pin grooves are distributed at 180 degrees.

As a further improvement of an embodiment of the present utility model, the planet carrier has a circular structure, a shaft hole adapted to the second platform is arranged at the center hole of the planet carrier, and the notch is communicated with the shaft hole.

As a further improvement of an embodiment of the present utility model, a bearing is further provided on the second platform, and the outer side of the planet carrier is in contact with the bearing.

As a further improvement of an embodiment of the present utility model, three stub shafts are circumferentially arranged on the planet carrier, each stub shaft is connected with a planet wheel through a transmission bearing, a space for placing a sun gear is formed between the planet wheels, and the sun gear and the planet wheels are in meshed transmission.

As a further improvement of an embodiment of the utility model, the sun gear is spaced apart from the first platform and extends with one end to the blocking surface side.

By adopting the technical scheme, the planetary carrier has the beneficial effects that through structural improvement of the transmission shaft, one side of the planetary carrier forms an upward-raised blocking surface, and the planetary carrier is stabilized under the actions of blocking and positioning and key connection of the blocking surface and the planetary carrier, so that the application of snap springs is reduced technically.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those skilled in the art from this disclosure that the drawings described below are merely exemplary and that other embodiments may be derived from the drawings provided without undue effort.

The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the utility model, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present utility model, should fall within the ambit of the technical disclosure.

Fig. 1 is a schematic view of a three-dimensional structure according to the present utility model.

Fig. 2 is a schematic diagram of a sectional structure according to the present utility model.

Fig. 3 is a schematic perspective view of a transmission shaft provided by the utility model.

Fig. 4 is a schematic perspective view of a planet carrier provided by the utility model.

In the figure:

1-transmission shaft, 11-first platform, 12-second platform, 13-key pin slot and 14-blocking surface;

2-planetary frame, 21-axle hole, 22-notch and 23-short axle;

3-planet wheels;

4-sun gear;

5-bearing;

6-transmission bearing.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.

In the present utility model, unless otherwise indicated, the use of orientation terms such as "upper, lower, top, bottom" are generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, vertical or gravitational direction, and likewise, for ease of understanding and description, "inner, outer" refer to inner, outer relative to the profile of the component itself, but such orientation terms are not intended to limit the utility model.

Examples

Referring to fig. 1-4, a planet carrier mounting structure mainly comprises two key components, namely a transmission shaft 1 and a planet carrier 2.

A first platform 11 and a second platform 12 of cylindrical structure are arranged on the transmission shaft 1. The two platforms are arranged adjacently and the diameter of the first platform 11 is significantly larger than the diameter of the second platform 12. The interface between the first platform 11 and the second platform 12 forms a stop surface 14 that plays a critical locating and limiting role in the overall mounting structure.

The planet carrier 2 is arranged on the second platform 12 of the drive shaft 1 with one end thereof abutting closely against the blocking surface 14. This abutment not only ensures the accurate position of the carrier 2 on the drive shaft 1, but also effectively prevents excessive movement of the carrier 2 in the axial direction. By means of this design, the planet carrier 2 can be kept stable during operation, so that the reliability and stability of the whole transmission system are ensured.

The transmission shaft 1 and the planet carrier 2 are connected by keys. Specifically, a key pin groove 13 is provided on the second platform 12 of the drive shaft 1. At the same time, the planet carrier 2 is correspondingly provided with notches which exactly correspond to the key pin grooves 13. Between the key pin slot 13 and the notch, a key pin is skillfully arranged, by means of which a firm connection and torque transmission between the drive shaft 1 and the planet carrier 2 is achieved.

Wherein one end of the key pin slot 13 abuts against the blocking surface 14. This abutment design has multiple advantages. First, it further enhances the positional stability of the key pin slot 13, avoiding displacement due to force during transmission. Second, abutment to the blocking surface 14 helps to more evenly distribute stresses generated during transmission, improving the durability of the overall structure.

The number of key pin grooves 13 in this embodiment is two, and the two key pin grooves 13 are distributed 180 degrees. The two key pin grooves 13 are distributed at 180 degrees, so that the connection between the transmission shaft 1 and the planet carrier 2 is more stable, and can bear larger torque and load.

In summary, the transmission shaft 1 and the planet carrier 2 are connected by the above key, including the key pin slot 13, the corresponding notch, the key pin and the reasonable distribution, which form a stable and efficient transmission connection structure together, so as to provide a powerful guarantee for the normal operation of the hub motor.

In this embodiment, the planet carrier 2 presents a circular structure, this design having good symmetry and stability. The central hole is provided with a shaft hole 21 matched with the second platform 12, so that the planet carrier 2 can be tightly and accurately installed on the second platform 12 of the transmission shaft 1, and coaxiality and stability in the transmission process are ensured.

At the same time, the notch 22 communicates with the shaft bore 21, which communication is designed to facilitate subsequent mounting and driving operations. The presence of the notch 22 enables the planet carrier 2 to be accurately docked with the relevant structure on the drive shaft 1, thereby achieving an efficient drive.

The planet carrier 2 is circumferentially provided with three short shafts 23, each short shaft 23 is connected with the planet wheel 3 through the transmission bearing 6, and the connection mode effectively reduces friction and abrasion, improves transmission efficiency and prolongs service life.

A sun gear 4 meshed with the planet gears 3 is arranged on the transmission shaft 1 in a clearance mode (the sun gear 4 is fixedly arranged on the rotor), and the sun gear 4 is located on the first platform 11 and in clearance distribution with the first platform 11. One end of the sun gear 4 extends to one side of the blocking surface 14.

In this embodiment, the second platform 12 is further provided with a bearing 5, and the outer side of the planet carrier 2 contacts with the bearing 5, so that the bearing 5 plays a certain limiting role on the planet carrier 2 in the axial direction, which is helpful for improving the stability of the installation of the planet carrier 2.

In summary, the embodiment of the utility model has the technical effect that the blocking surface 14 protruding upwards is formed on one side of the planet carrier 2 through the structural improvement of the transmission shaft 1, and the blocking surface 14 has an effective blocking and positioning effect on the planet carrier 2. Under the cooperation of the key connection, the stable operation of the planet carrier 2 is jointly ensured. This double safeguard mechanism greatly enhances the stability and reliability of the planet carrier 2 during operation. Meanwhile, the application of the clamp spring is successfully reduced in the process. The omission of the snap spring brings a plurality of advantages. Firstly, the number of parts is reduced, the whole structure is simplified, and the production cost is reduced. Secondly, in the assembly process, the complex procedure of installing the clamp spring is reduced, and the production efficiency is improved. Furthermore, the hidden trouble caused by improper installation of the clamp spring is avoided, and the quality stability of the product is improved.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (8)

1. The planet carrier mounting structure comprises a transmission shaft and a planet carrier and is characterized in that a first platform and a second platform which are of cylindrical structures are arranged on the transmission shaft, the first platform and the second platform are adjacently arranged, the diameter of the first platform is larger than that of the second platform, a blocking surface is formed at the junction of the first platform and the second platform, the planet carrier is arranged on the second platform of the transmission shaft, one end of the planet carrier is abutted to the blocking surface, and the transmission shaft is connected with the planet carrier through a key.

2. The planet carrier mounting structure according to claim 1, wherein the second platform is provided with a key pin groove, the planet carrier is provided with a notch corresponding to the key pin groove, and a key pin is arranged between the key pin groove and the notch.

3. The planet carrier mounting structure of claim 2, wherein one end of the key slot abuts against the blocking surface.

4. The planet carrier mounting structure of claim 3, wherein the number of key pin grooves is two, and the key pin grooves are distributed at 180 degrees.

5. The planet carrier mounting structure according to claim 4, wherein the planet carrier is of a circular structure, a shaft hole matched with the second platform is formed in a center hole of the planet carrier, and the notch is communicated with the shaft hole.

6. The carrier mounting structure as set forth in claim 1, wherein a bearing is further provided on the second platform, and an outer side of the carrier is in contact with the bearing.

7. The planet carrier mounting structure according to claim 1, wherein three short shafts are circumferentially arranged on the planet carrier, each short shaft is connected with a planet wheel through a transmission bearing, a space for placing a sun wheel is formed between the planet wheels, and the sun wheel and the planet wheels are in meshed transmission.

8. The planet carrier mounting structure of claim 7, wherein the sun gear is spaced from the first platform and has one end extending to the blocking surface side.