Planetary gearbox capable of serving as motor end cover and motor

Abstract

The planetary gearbox capable of serving as the motor end cover comprises a planet carrier, a sun gear and a connector, the connector is connected with the sun gear in an interference fit mode, axial positioning is provided through a shaft shoulder of the sun gear, an input-stage bearing is arranged on the outer circle of the connector, and the input-stage bearing provides radial supporting. The utility model further relates to a motor, the motor comprises the planetary gearbox capable of serving as the motor end cover and further comprises a motor stator shell and a motor rotor, the outer circle of the fixed end of the planet carrier is fixedly connected with the motor stator shell, and the connector is fixedly connected with the motor rotor. The space utilization rate is effectively improved, the number of parts is reduced to a great extent, and the cost of the whole machine is reduced; the motor and the gear box are integrated into a whole, the defect that the motor cannot provide high torque is overcome, and the motor can be applied to occasions with high torque requirements.

Description

Technical Field

[0001] This application relates to the field of planetary transmission mechanism technology, and in particular to a planetary gearbox and motor that can serve as an end cover for a motor. Background Technology

[0002] Currently, motor structures typically include front and rear end covers and a stator core. To obtain greater torque, an additional speed reducer is required, as the motor itself does not have a speed reducer function. In some applications with stringent space requirements, connecting the motor to an external gearbox cannot meet these requirements, necessitating a reduction in the size of the motor or gearbox, which lowers the performance of both and affects the lifespan of the gearbox.

[0003] Therefore, existing technologies have shortcomings and need to be improved. Summary of the Invention

[0004] This application provides a planetary gearbox and a motor that can serve as motor end caps to solve the above-mentioned problems.

[0005] In a first aspect, this application provides a planetary gearbox that can serve as an end cover for a motor, including a planet carrier, a sun gear, and a connector. The connector is interference-fitted with the sun gear and provides axial positioning through the shoulder of the sun gear. An input stage bearing is provided on the outer circle of the connector, and the input stage bearing provides radial support.

[0006] Optionally, the input stage bearing has a first retaining ring at both ends of its inner and outer rings. The first retaining ring is embedded in the bearing position preset by the planetary carrier to restrict the axial movement of the input stage bearing.

[0007] Optionally, the connector is provided with a second retaining ring, which, together with a pre-set shoulder on the connector, locks the inner ring of the input stage bearing, thereby restricting the axial movement of the connector.

[0008] Optionally, the device includes a gear ring, planetary gears, and a pin. The pin is mounted on the planet carrier, the planetary gears are mounted on the pin, the planet carrier is located inside the gear ring and meshes with the planetary gears, and the planet carrier drives the sun gear to rotate tangentially together.

[0009] Optionally, the planetary carrier has a slot for placing the planetary gears, and the pin can be inserted through the center of the slot, with the planetary gears mounted on the pin.

[0010] Optionally, a friction plate is provided at each end of the planetary gear to reduce the friction force when the planetary gear is running.

[0011] Optionally, the planetary carrier is provided with two output stage bearings, the outer circle of which is connected to the gear ring, and the gear ring is respectively connected to multiple planetary gears.

[0012] Secondly, this application provides an electric motor, including the aforementioned planetary gearbox that can serve as an end cover for the motor, and also including a motor stator housing and a motor rotor. The outer circle of the fixed end of the planetary carrier is fixedly connected to the motor stator housing, and the connector is fixedly connected to the motor rotor.

[0013] Optionally, the outer circle of the planetary carrier matches the shape and size of the motor stator housing.

[0014] Optionally, the outer circle of the fixed end of the planetary carrier is fastened to the motor stator housing by bolts, and the connector is fastened to the motor rotor by bolts.

[0015] The technical solutions provided in this application have the following advantages compared with the prior art:

[0016] This application provides a planetary gearbox that can serve as a motor end cover, which effectively improves space utilization, greatly reduces the number of parts, lowers the overall cost, and significantly reduces the space occupied by the machine. At the same time, by integrating the motor and gearbox into one unit, the overall axial distance is shortened, which makes up for the disadvantage that the motor itself cannot provide high torque, and can be applied to occasions with high torque requirements. Attached Figure Description

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

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0020] Figure 1 This is a schematic diagram of the external structure of a planetary gearbox that can serve as an end cover for a motor, provided by this utility model.

[0021] Figure 2This is a schematic diagram of the internal structure connection between the gearbox and the motor stator housing of this utility model;

[0022] Figure 3 Based on Figure 1 A schematic diagram of the internal structure.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Planetary carrier; 2. Gear ring; 3. Output stage bearing; 4. End cover; 5. Planetary gear; 6. Friction plate; 7. Pin; 8. Sun gear; 9. Input stage bearing; 10. Connector; 11. Motor stator housing; 12. Motor rotor; 13. Gearbox; 14. First retaining ring; 15. Second retaining ring. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0027] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0028] To address the technical problems in the prior art, this application provides a planetary gearbox that can serve as a motor end cover, which effectively improves space utilization, greatly reduces the number of parts, lowers the overall cost, and significantly reduces the space occupied by the entire machine. At the same time, by integrating the motor and gearbox into one unit, the overall axial distance is shortened, which makes up for the disadvantage that the motor itself cannot provide high torque, and can be applied to occasions with high torque requirements.

[0029] Figure 1-3 An electric motor provided in this application embodiment includes a planetary gearbox that can serve as a motor end cover, a motor stator housing 11, and a motor rotor 12. The planetary gearbox that can serve as a motor end cover includes a planet carrier 1, a sun gear 8, a motor rotor 12, and a connector 10. The planet carrier 1 of the planetary gearbox that can serve as a motor end cover acts as a fixing element. The outer circle of the fixing end of the planet carrier 1 is fixedly connected to the motor stator housing 11, and the connector 10 is fixedly connected to the motor rotor 12.

[0030] In this utility model, the outer circle of the fixed end of the planetary carrier 1 is fastened to the motor stator housing 11 by bolts, and the connector 10 is fastened to the motor rotor 12 by bolts. In addition to these, welding, adhesive bonding or other methods can also be used to achieve fixation.

[0031] Furthermore, the sun gear 8 serves as the input element of the gearbox 13, and the connector 10 is interference-fitted with the sun gear 8, providing axial positioning through the shoulder of the sun gear 8.

[0032] Please see Figure 3The outer circle of connector 10 is provided with an input stage bearing 9, which together with the bearing at the other end of motor rotor 12 provides radial support.

[0033] Please see Figure 2-3 The planetary gearbox that can serve as a motor end cover in this application includes a gear ring 2, planetary gears 5 and a pin 7. The pin 7 is mounted on the planet carrier 1, the planetary gears 5 are mounted on the pin 7, the planet carrier 1 is located inside the gear ring 2 and is meshed with the planetary gears 5, and the planet carrier 1 drives the sun gear 8 to rotate tangentially together.

[0034] Furthermore, the planetary carrier 1 has slots for placing planetary gears 5, and a pin 7 can be inserted through the center of the slot, with the planetary gears 5 mounted on the pin 7. Each end of the planetary gear 5 is provided with a friction plate 6 to reduce the friction of the planetary gear 5 during operation, and also to reduce the overall temperature rise of the gearbox 13.

[0035] Preferably, the planetary carrier 1 is provided with two output stage bearings 3, the outer circle of the output stage bearing 3 is connected to the gear ring 2, and the gear ring 2 is connected to multiple planet gears 5 respectively. An end cover 4 is included, which is mounted on the planetary carrier 1 and fastened with bolts. The outer circle of the end cover 4 is connected to the inner ring of the output stage bearing 3 to provide axial compression.

[0036] In some specific implementations, both the inner and outer rings of the input stage bearing 9 are provided with a first retaining ring. The first retaining ring 14 is embedded in the pre-set bearing position of the planetary carrier 1 to restrict the axial movement of the input stage bearing 9.

[0037] Please continue reading. Figure 3 The connector 10 is provided with a second retaining ring 15, which, together with a pre-set shoulder on the connector 10, locks the inner ring of the input stage bearing 9, restricting the axial movement of the connector 10. The connector 10 has an inner hole that mates with the motor rotor 12, and a clearance fit connection is achieved through the inner hole.

[0038] It should be noted that the shoulders, first retaining ring 14 and second retaining ring 15 of the above-mentioned parts all act as retaining edges, which restrict the operation of gearbox 13 in the direction and prevent it from disengaging.

[0039] This application embodiment also provides an electric motor, which includes the aforementioned planetary gearbox that can serve as a motor end cover, and also includes a motor stator housing 11. The planet carrier 1 serves as a fixing element, and the outer circle of the fixing end of the planet carrier 1 is connected to the motor stator housing 11 by bolt fastening.

[0040] As some embodiments, the outer circle of the planetary carrier 1 matches the shape and size of the motor stator housing 11. In practice, the motor stator housing 11 can be made into a suitable size and shape.

[0041] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0042] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0044] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0045] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0047] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Since these modifications and variations fall within the scope of the claims and their equivalents, this application also intends to include these modifications and variations.

[0048] The above description describes specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A planetary gearbox that can serve as an end cover for a motor, characterized in that: It includes a planetary carrier, a sun gear, and a connector. The connector is interference-fitted to the sun gear and provides axial positioning through the shoulder of the sun gear. An input stage bearing is provided on the outer circle of the connector, and the input stage bearing provides radial support.

2. The planetary gearbox that can serve as a motor end cover according to claim 1, characterized in that: The input stage bearing has a first retaining ring at both ends of its inner and outer rings. The first retaining ring is embedded in the bearing position preset by the planetary carrier to restrict the axial movement of the input stage bearing.

3. The planetary gearbox that can serve as a motor end cover according to claim 2, characterized in that: The connector is provided with a second retaining ring, which, together with a pre-set shoulder on the connector, locks the inner ring of the input stage bearing, restricting the axial movement of the connector.

4. The planetary gearbox that can serve as a motor end cover according to claim 1, characterized in that: It includes a gear ring, planetary gears, and a pin. The pin is mounted on the planet carrier, the planetary gears are mounted on the pin, the planet carrier is located inside the gear ring and is meshed with the planetary gears, and the planet carrier drives the sun gear to rotate tangentially together.

5. The planetary gearbox that can serve as a motor end cover according to claim 4, characterized in that: The planetary carrier has slots for placing the planetary gears, and the pin can be inserted through the center of the slots, with the planetary gears mounted on the pins.

6. The planetary gearbox that can serve as a motor end cover according to claim 5, characterized in that: A friction plate is provided at each end of the planetary gear to reduce the friction force when the planetary gear is running.

7. The planetary gearbox that can serve as a motor end cover according to claim 6, characterized in that: The planetary carrier is provided with two output stage bearings. The outer circle of the output stage bearing is connected to the gear ring, and the gear ring is connected to multiple planetary gears respectively.

8. An electric motor, characterized in that: The planetary gearbox, which can serve as a motor end cover as described in any one of claims 1-7, further includes a motor stator housing and a motor rotor, wherein the outer circle of the fixed end of the planetary carrier is fixedly connected to the motor stator housing, and the connector is fixedly connected to the motor rotor.

9. The motor according to claim 8, characterized in that: The outer circle of the planetary carrier matches the shape and size of the motor stator housing.

10. The motor according to claim 8, characterized in that: The fixed end outer circle of the planetary carrier is fastened to the motor stator housing by bolts, and the connector is fastened to the motor rotor by bolts.

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