A bidirectional drive hub geared motor and a vehicle using it

Abstract

This utility model relates to a bidirectional drive hub geared motor and a vehicle using the same. The bidirectional drive hub geared motor includes a housing, within which a stator, a rotor, and a rotor shaft connected to the rotor are housed. The stator is fixed relative to the housing and drives the rotor to rotate, causing the rotor to drive the rotor shaft to rotate. The housing has a first end and a second end opposite to each other along the axial direction of the rotor shaft. The first end has a first output shaft, and the second end has a second output shaft. The center lines of the first and second output shafts coincide. The rotor shaft is connected to the first and second output shafts respectively through a reduction transmission mechanism, so as to drive the first and second output shafts to rotate at the same speed and in the same direction. The hub geared motor of this utility model has bidirectional drive function, which can meet the needs of existing applications requiring bidirectional drive.

Description

Technical Field

[0001] This utility model relates to the field of wheel hub geared motor technology, and in particular to a bidirectional transmission wheel hub geared motor and a vehicle using it. Background Technology

[0002] Most existing hub geared motors are single-output shaft drive hub geared motors, a common integrated drive device consisting of a motor, a reduction mechanism, and a one-way clutch. They are typically mounted directly inside the wheel hub to achieve unidirectional power transmission output, suitable for light electric vehicles and automated equipment. However, this type of single-output shaft drive hub geared motor cannot meet the needs of applications requiring bidirectional transmission, thus requiring a solution to this problem. Utility Model Content

[0003] In view of this, the present invention provides a bidirectional drive hub geared motor and a vehicle using it. The main technical problem to be solved is: how to enable the hub geared motor to have bidirectional drive function so as to meet the needs of existing applications that require bidirectional drive.

[0004] To achieve the above objectives, this utility model mainly provides the following technical solutions:

[0005] An embodiment of this utility model provides a bidirectional transmission hub geared motor, which includes a housing, a stator, a rotor, and a rotor shaft connected to the rotor inside the housing; the stator is fixed relative to the housing, and the stator is used to drive the rotor to rotate, so that the rotor drives the rotor shaft to rotate;

[0006] The housing has a first end and a second end opposite to each other along the axial direction of the rotor shaft. The first end has a first output shaft and the second end has a second output shaft. The center lines of the first output shaft and the second output shaft coincide. The rotor shaft is connected to the first output shaft and the second output shaft respectively through a speed reduction transmission mechanism so as to drive the first output shaft and the second output shaft to rotate at the same speed and in the same direction.

[0007] In some embodiments, the speed reduction transmission mechanism includes a first speed reduction mechanism and a second speed reduction mechanism. The speed reduction transmission mechanism connects one axial end of the rotor shaft and the first output shaft through the first speed reduction mechanism, and the speed reduction transmission mechanism connects the other axial end of the rotor shaft and the second output shaft through the second speed reduction mechanism.

[0008] In some embodiments, a first transmission gear structure is provided at one axial end of the rotor shaft, and a second transmission gear structure is provided on the inner wall of the housing. The first reduction mechanism includes the first transmission gear structure, the second transmission gear structure, and a planetary gear. The planetary gear meshes between the first transmission gear structure and the second transmission gear structure to revolve around the axis of the first output shaft under the drive of the rotor shaft.

[0009] The planetary gear has a first axle connected to the first output shaft. The planetary gear is used to drive the first output shaft to rotate via the first axle when it revolves around the axis of the first output shaft.

[0010] In some embodiments, the first reduction mechanism includes an internal gear ring having the second transmission tooth structure, and the internal gear ring is fitted inside the housing.

[0011] And / or, the first transmission gear structure is integrally formed on the rotor shaft.

[0012] In some embodiments, the first deceleration mechanism and the second deceleration mechanism are arranged symmetrically.

[0013] In some embodiments, the bidirectional drive hub geared motor further includes a stator base, which is fixedly connected to the housing;

[0014] The stator is fixed on the stator base to be fixedly connected to the housing through the stator base; the rotor is sleeved on the outside of the stator and is fixed on the rotor shaft by a connecting piece.

[0015] In some embodiments, when the speed reduction transmission mechanism includes a first speed reduction mechanism and a second speed reduction mechanism, and the speed reduction transmission mechanism connects one axial end of the rotor shaft and the first output shaft through the first speed reduction mechanism, and the speed reduction transmission mechanism connects the other axial end of the rotor shaft and the second output shaft through the second speed reduction mechanism,

[0016] The housing has a relatively fixed first outer shell, a second outer shell, and a motor housing; the motor housing is barrel-shaped, and the housing is fixedly connected to the stator base through the open end of the motor housing, forming a receiving cavity between the motor housing and the stator base, and the stator, the rotor, and the connecting member are all located within the receiving cavity;

[0017] The first housing is located on the side of the motor housing opposite to the stator base, and the first housing has the first end. The first reduction mechanism is disposed inside the first housing, and the end of the motor housing opposite to the stator base has a through hole for one axial end of the rotor shaft to pass through. The second housing is located on the side of the fixed base opposite to the motor housing, and the second housing has the second end. The second reduction mechanism is disposed inside the second housing.

[0018] In some embodiments, the first housing, the motor housing, the stator base, and the second housing are sequentially and detachably fixedly connected.

[0019] In some embodiments, a first sliding bearing is sleeved between the first output shaft and the first housing; the number of the first sliding bearings is two or more, and they are arranged at intervals along the axial direction of the first output shaft.

[0020] And / or, a second sliding bearing is sleeved between the second output shaft and the second housing; the number of the second sliding bearings is two or more, and they are arranged sequentially at intervals along the axial direction of the second output shaft.

[0021] This utility model also provides a vehicle that includes the bidirectional drive hub reduction motor described in any of the above-mentioned embodiments.

[0022] By employing the above technical solution, the bidirectional transmission hub geared motor of this utility model and the vehicle using it have at least the following beneficial effects:

[0023] 1. The hub geared motor of this utility model has bidirectional transmission function to meet the needs of existing applications requiring bidirectional transmission. At the same time, the hub geared motor of this utility model has uniform output power distribution in both directions, enabling high torque, same speed, and same direction operation.

[0024] 2. The bidirectional transmission hub geared motor of this utility model integrates the reduction transmission mechanism with the motor structure, making the overall structure more compact, easy to install and disassemble, and also optimizing the space utilization of the equipment.

[0025] 3. This utility model adopts a dual-axis planetary gear structure. Through the transmission of planetary gears, it achieves efficient power transmission and deceleration, effectively improving transmission efficiency while ensuring the stability of the deceleration process.

[0026] 4. The planetary transmission of the output shafts at both ends of the hub geared motor of this utility model adopts a symmetrical design, which makes the force and motion characteristics of the two output shafts consistent, thereby improving the balance and reliability of the transmission.

[0027] 5. The hub geared motor of this utility model also solves the shortcomings of traditional motors in terms of transmission efficiency, stability and maintenance convenience, breaks through the dustproof and waterproof rating of IP67, has a good sealing structure, and can effectively isolate moisture and dust and other substances.

[0028] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of a bidirectional transmission hub geared motor provided in one embodiment of the present invention;

[0031] Figure 2 yes Figure 1 A cross-sectional view of a bidirectional drive hub geared motor.

[0032] Reference numerals: 1. Stator; 2. Rotor; 3. Connecting component; 4. First output shaft; 5. Second output shaft; 6. Housing; 7. First reduction mechanism; 8. Second reduction mechanism; 9. First sliding bearing; 10. Second sliding bearing; 11. Internal gear ring; 12. Stator base; 13. Rotor shaft; 41. Connecting disc; 61. First outer casing; 62. Motor casing; 63. Second outer casing; 71. First transmission gear structure; 72. Planetary gear; 73. Second transmission gear structure; 721. First axle; 601. First end; 602. Second end; 621. Receiving cavity; 622. Through hole. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0035] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0036] like Figure 1 and Figure 2 As shown in the figure, one embodiment of this utility model discloses a bidirectional transmission hub geared motor, which includes a housing 6, within which a stator 1, a rotor 2, and a rotor shaft 13 are disposed. The rotor 2 is connected to the rotor shaft 13. The stator 1 is fixed relative to the housing 6. The stator 1 is used to drive the rotor 2 to rotate, causing the rotor 2 to drive the rotor shaft 13 to rotate.

[0037] The housing 6 has a first end 601 and a second end 602 along the axial direction of the rotor shaft 13. The first end 601 has a first output shaft 4, and the second end 602 has a second output shaft 5. The center lines of the first output shaft 4 and the second output shaft 5 coincide. The rotor shaft 13 is connected to the first output shaft 4 and the second output shaft 5 respectively through a reduction transmission mechanism, so as to drive the first output shaft 4 and the second output shaft 5 to rotate at the same speed and in the same direction.

[0038] In the above example, the stator 1 drives the rotor 2 to rotate, the rotor 2 drives the rotor shaft 13 to rotate, and the rotor shaft 13 drives the first output shaft 4 and the second output shaft 5 to rotate at the same speed and in the same direction through the reduction transmission mechanism. This allows the hub geared motor to have bidirectional transmission function to meet the needs of existing applications that require bidirectional transmission.

[0039] It should be noted that the first output shaft 4 and the second output shaft 5 mentioned above rotate synchronously.

[0040] To achieve the aforementioned technical effect of connecting the rotor shaft 13 to the first output shaft 4 and the second output shaft 5 via a reduction gear transmission mechanism, in some embodiments, such as... Figure 2As shown, the aforementioned speed reduction transmission mechanism includes a first speed reduction mechanism 7 and a second speed reduction mechanism 8. The speed reduction transmission mechanism connects one axial end of the rotor shaft 13 and the first output shaft 4 through the first speed reduction mechanism 7, and connects the other axial end of the rotor shaft and the second output shaft 5 through the second speed reduction mechanism 8. Thus, when the rotor shaft 13 rotates, it can drive the first output shaft 4 to rotate through the first speed reduction mechanism 7, and it can also drive the second output shaft 5 to rotate through the second speed reduction mechanism 8, thereby achieving the purpose of synchronously rotating both the first output shaft 4 and the second output shaft 5 driven by the rotor shaft 13.

[0041] To achieve the function of the aforementioned first deceleration mechanism 7, in some embodiments, such as Figure 2 As shown, a first transmission gear structure 71 is provided at one axial end of the aforementioned rotor shaft 13. A second transmission gear structure 73 is provided on the inner wall of the housing 6. The aforementioned first reduction mechanism 7 includes the first transmission gear structure 71, the second transmission gear structure 73, and a planetary gear 72. The planetary gear 72 meshes between the first transmission gear structure 71 and the second transmission gear structure 73 to revolve around the axis of the first output shaft 4 under the drive of the rotor shaft 13. The planetary gear 72 has a first gear shaft 721, which is connected to the first output shaft 4. The planetary gear 72 is used to drive the first output shaft 4 to rotate via the first gear shaft 721 when revolving around the axis of the first output shaft 4.

[0042] In the above example, when the rotor shaft 13 rotates, the first transmission gear structure 71 on the rotor shaft 13 and the second transmission gear structure 73 on the inner wall of the housing 6 cooperate to drive the planetary gear 72 to revolve around the axis of the first output shaft 4. Since the first gear shaft 721 of the planetary gear 72 is connected to the first output shaft 4, the planetary gear 72 can drive the first output shaft 4 to rotate through the first gear shaft 721 when it revolves around the axis of the first output shaft 4, thereby achieving the purpose of the rotor shaft 13 driving the first output shaft 4 to rotate through the first reduction mechanism 7.

[0043] In some implementations, such as Figure 2 As shown, the aforementioned planetary gears 72 can be two or more, and are evenly arranged around the axis of the first output shaft 4. One end of the first output shaft 4 has a connecting disk 41, which can be integrally formed on the first output shaft 4. The first gear shaft 721 of the planetary gears 72 is mounted on the connecting disk 41 to be connected to the first output shaft 4 via the connecting disk 41.

[0044] In some implementations, such as Figure 2As shown, the aforementioned first reduction mechanism 7 may include an internal gear ring 11, which has the aforementioned second transmission gear structure 73, and the internal gear ring 11 is fitted inside the housing 6. By placing the second transmission gear structure 73 on a separate component, namely the internal gear ring 11, the machining of the second transmission gear structure 73 is facilitated.

[0045] In some embodiments, the aforementioned first transmission gear structure 71 can be integrally formed on the rotor shaft 13 to improve the connection stability between the first transmission gear structure 71 and the rotor shaft 13.

[0046] In some implementations, such as Figure 2 As shown, the aforementioned first reduction mechanism 7 and second reduction mechanism 8 can be symmetrically arranged so that the force and motion characteristics of the first output shaft 4 and the second output shaft 5 are consistent, thereby improving the balance and reliability of the transmission.

[0047] In some implementations, such as Figure 2 As shown, the aforementioned bidirectional drive hub geared motor also includes a stator base 12, which is fixedly connected to the housing 6. The aforementioned stator 1 is fixed on the stator base 12 to be fixedly connected to the housing 6 via the stator base 12. The aforementioned rotor 2 is sleeved on the outside of the stator 1, and the rotor 2 is fixed to the rotor shaft 13 via a connecting piece 3.

[0048] In the example above, by mounting the rotor 2 on the outside of the stator 1, the space inside the housing 6 can be fully utilized.

[0049] In some implementations, such as Figure 2 As shown, when the reduction transmission mechanism includes a first reduction mechanism 7 and a second reduction mechanism 8, and the reduction transmission mechanism connects one axial end of the rotor shaft 13 and the first output shaft 4 through the first reduction mechanism 7, and the reduction transmission mechanism connects the other axial end of the rotor shaft and the second output shaft 5 through the second reduction mechanism 8, the housing 6 has a relatively fixed first outer shell 61, a second outer shell 63, and a motor housing 62. The motor housing 62 is barrel-shaped, and the housing 6 is fixedly connected to the stator base 12 through the open end of the motor housing 62. A receiving cavity 621 is formed between the motor housing 62 and the stator base 12. The aforementioned stator 1, rotor 2, and connecting member 3 are all located within this receiving cavity 621. The first outer shell 61 is located on the side of the motor housing 62 facing away from the stator base 12, and the first outer shell 61 has the aforementioned first end 601. The first reduction mechanism 7 is disposed within the first outer shell 61, and the end of the motor housing 62 facing away from the stator base 12 has a through hole 622 through which one axial end of the rotor shaft 13 passes. The second housing 63 is located on the side of the fixed base away from the motor housing 62, and the second housing 63 has the aforementioned second end 602, and the second reduction mechanism 8 is disposed inside the second housing 63.

[0050] In the above example, by designing the housing 6 into multiple segments and installing the first reduction mechanism 7, the motor structure, and the second reduction mechanism 8 in different segments of the housing 6, it is beneficial to install each part and reduce interference between them.

[0051] In some embodiments, the aforementioned first housing 61, motor housing 62, stator base 12 and second housing 63 are sequentially and detachably fixedly connected, for example, by screws, which facilitates the disassembly, assembly and maintenance of each part.

[0052] In some implementations, such as Figure 2 As shown, a first sliding bearing 9 is sleeved between the aforementioned first output shaft 4 and the first housing 61. There are two or more first sliding bearings 9, and they are arranged sequentially at intervals along the axial direction of the first output shaft 4 to improve the sealing performance of one end of the housing 6 along the axial direction.

[0053] In some implementations, such as Figure 2 As shown, a second sliding bearing 10 is sleeved between the aforementioned second output shaft 5 and the second housing 63. There are two or more second sliding bearings 10, and they are arranged sequentially at intervals along the axial direction of the second output shaft 5 to improve the sealing performance of the other end of the housing 6 in the axial direction.

[0054] In some embodiments, the present invention also provides a vehicle that may include any of the bidirectional drive hub geared motors described above. The vehicle may be an electric vehicle, an industrial AGV vehicle, or a robotic vehicle, etc.

[0055] This invention's bidirectional hub geared motor integrates the reduction transmission mechanism with the motor structure, resulting in a more compact overall structure that facilitates installation and disassembly while optimizing space utilization. Furthermore, it employs a dual-shaft planetary gear structure, utilizing planetary gears 72 to achieve efficient power transmission and deceleration, effectively improving transmission efficiency and ensuring stability during deceleration. The hub geared motor features bidirectional transmission, even power distribution, and high torque at the same speed and direction. The symmetrical planetary transmission design of the output shafts at both ends ensures consistent force and motion characteristics, enhancing transmission balance and reliability. This invention also addresses the shortcomings of traditional motors in transmission efficiency, stability, and maintenance convenience, achieving a dustproof and waterproof rating of IP67 with a robust sealing structure that effectively isolates moisture and dust.

[0056] The technical solution of this utility model solves the limitations of the existing unidirectional transmission system, improves energy utilization efficiency, achieves high transmission efficiency, high torque output, and rotation at the same speed and in the same direction, and breaks through the waterproof and dustproof technology (level: IP67), improving the balance and reliability of the transmission.

[0057] This utility model integrates the motor structure, reduction transmission mechanism, and bidirectional transmission function within the housing 6. Bidirectional drive is directly achieved through motor structure control, while the reduction transmission mechanism enhances torque output, realizing high torque, same speed, and same direction power output. The symmetrical design at both ends solves the problem of mechanical failure caused by uneven force distribution; it also overcomes the spatial constraints of this innovative layout. The hub geared motor of this utility model can maintain stable operation in complex environments and has advantages such as high space utilization, high transmission efficiency, high torque output, easy maintenance, compact structure, strong load-bearing capacity, and long service life.

[0058] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A bidirectional drive hub geared motor, characterized in that, Includes a housing (6), inside which are provided a stator (1), a rotor (2) and a rotor shaft (13) connected to the rotor (2); the stator (1) is fixed relative to the housing (6), and the stator (1) is used to drive the rotor (2) to rotate, so that the rotor (2) drives the rotor shaft (13) to rotate; The housing (6) has a first end (601) and a second end (602) opposite each other along the axial direction of the rotor shaft (13). The first end (601) has a first output shaft (4), and the second end (602) has a second output shaft (5). The center lines of the first output shaft (4) and the second output shaft (5) coincide. The rotor shaft (13) is connected to the first output shaft (4) and the second output shaft (5) respectively through a speed reduction transmission mechanism, so as to drive the first output shaft (4) and the second output shaft (5) to rotate at the same speed and in the same direction.

2. The bidirectional drive hub geared motor as described in claim 1, characterized in that, The speed reduction transmission mechanism includes a first speed reduction mechanism (7) and a second speed reduction mechanism (8). The speed reduction transmission mechanism connects one axial end of the rotor shaft (13) and the first output shaft (4) through the first speed reduction mechanism (7), and the speed reduction transmission mechanism connects the other axial end of the rotor shaft (13) and the second output shaft (5) through the second speed reduction mechanism (8).

3. The bidirectional drive hub geared motor as described in claim 2, characterized in that, The rotor shaft (13) has a first transmission gear structure (71) at one axial end, and the inner wall of the housing (6) has a second transmission gear structure (73). The first reduction mechanism (7) includes the first transmission gear structure (71), the second transmission gear structure (73), and a planetary gear (72). The planetary gear (72) meshes between the first transmission gear structure (71) and the second transmission gear structure (73) to revolve around the axis of the first output shaft (4) under the drive of the rotor shaft (13). The planetary gear (72) has a first axle (721) connected to the first output shaft (4). The planetary gear (72) is used to drive the first output shaft (4) to rotate via the first axle (721) when it revolves around the axis of the first output shaft (4).

4. The bidirectional drive hub geared motor as described in claim 3, characterized in that, The first deceleration mechanism (7) includes an internal gear ring (11), which has the second transmission gear structure (73) and is fitted inside the housing (6). And / or, the first transmission gear structure (71) is integrally formed on the rotor shaft (13).

5. The bidirectional drive hub geared motor as described in any one of claims 2-4, characterized in that, The first deceleration mechanism (7) and the second deceleration mechanism (8) are arranged symmetrically.

6. The bidirectional drive hub geared motor as described in any one of claims 1-4, characterized in that, It also includes a stator base (12), which is fixedly connected to the housing (6); The stator (1) is fixed on the stator base (12) to be fixedly connected to the housing (6) through the stator base (12); the rotor (2) is sleeved on the outside of the stator (1) and the rotor (2) is sleeved on the rotor shaft (13) through the connector (3).

7. The bidirectional drive hub geared motor as described in claim 6, characterized in that, When the speed reduction transmission mechanism includes a first speed reduction mechanism (7) and a second speed reduction mechanism (8), and the speed reduction transmission mechanism connects one axial end of the rotor shaft (13) and the first output shaft (4) through the first speed reduction mechanism (7), and the speed reduction transmission mechanism connects the other axial end of the rotor shaft (13) and the second output shaft (5) through the second speed reduction mechanism (8), The housing (6) has a relatively fixed first outer shell (61), a second outer shell (63), and a motor housing (62); the motor housing (62) is barrel-shaped, and the housing (6) is fixedly connected to the stator base (12) through the open end of the motor housing (62). A receiving cavity (621) is formed between the motor housing (62) and the stator base (12), and the stator (1), the rotor (2), and the connecting member (3) are all located in the receiving cavity (621); The first housing (61) is located on the side of the motor housing (62) away from the stator base (12), and the first housing (61) has the first end (601). The first reduction mechanism (7) is disposed inside the first housing (61), and the end of the motor housing (62) away from the stator base (12) has a through hole (622) through which one axial end of the rotor shaft (13) passes. The second housing (63) is located on the side of the fixed base away from the motor housing (62), and the second housing (63) has the second end (602). The second reduction mechanism (8) is disposed inside the second housing (63).

8. The bidirectional drive hub geared motor as described in claim 7, characterized in that, The first housing (61), the motor housing (62), the stator base (12), and the second housing (63) are sequentially and detachably fixedly connected.

9. The bidirectional drive hub geared motor as described in claim 7 or 8, characterized in that, A first sliding bearing (9) is sleeved between the first output shaft (4) and the first housing (61); there are two or more first sliding bearings (9), and they are arranged at intervals along the axial direction of the first output shaft (4); And / or, a second sliding bearing (10) is sleeved between the second output shaft (5) and the second housing (63); the number of the second sliding bearings (10) is two or more, and they are arranged sequentially at intervals along the axial direction of the second output shaft (5).

10. A vehicle, characterized in that, The bidirectional drive hub geared motor includes any one of claims 1-9.

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