Hub gear motor and vehicle using same

Abstract

The utility model relates to a hub gear motor and a vehicle applying the same, the hub gear motor comprises a fixed output shaft and a casing rotatably sleeved on the fixed output shaft, the casing is internally provided with an accommodating cavity, the accommodating cavity is internally provided with a motor structure, the motor structure is provided with a fixed seat, a stator and a rotor, and the stator and the rotor are fixed on the fixed seat. The fixed base is fixedly connected with the fixed output shaft, the stator and the rotor are both arranged on the fixed base, and the stator is used for driving the rotor to rotate so as to drive the machine shell to rotate through the rotor; a bearing is arranged between the fixing base and the machine shell in a sleeved mode, and the fixing base supports the machine shell through the bearing. According to the technical scheme of the utility model, the shock resistance of the internal motor structure of the hub gear motor can be improved.

Description

Technical Field

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

[0002] Hub geared motors are typically used on vehicle wheels. For example... Figure 1 As shown, the existing hub geared motor includes a fixed output shaft 2 and a housing 1 rotatably mounted on the fixed output shaft 2. The housing 1 has an internal cavity 10, within which a motor structure is housed. The motor structure includes a fixed base 14, a stator 6, and a rotor shaft 9. The fixed base 14 is fixedly connected to the fixed output shaft 2. Both the stator 6 and the rotor shaft 9 are mounted on the fixed base 14. The stator 6 drives the rotor shaft 9 to rotate. The inner wall of the housing 1 has transmission teeth 13. The rotor shaft 9 is connected to the transmission teeth 13 via a gear transmission mechanism 4 to drive the housing 1 to rotate. The fixed output shaft 2 extends out of the internal cavity 10, and the rotor shaft 9 is located on the axial side of the fixed output shaft 2. The end of the rotor shaft 9 facing away from the fixed output shaft 2 is mounted in a bearing seat 16 on the housing 1, with the end of the rotor shaft 9 facing away from the fixed output shaft 2 supported by a first bearing 17.

[0003] The tail end of the rotor shaft 9, which is the end away from the fixed output shaft 2, is connected to the housing 1 through the first bearing 17. When the housing 1 is subjected to external impact, such as a bump or a drop, the impact force is easily transmitted to the rotor shaft 9 through the first bearing 17, causing damage to the internal structure of the motor. Utility Model Content

[0004] In view of this, the present invention provides a hub geared motor and a vehicle using it, and the main technical problem to be solved is: how to improve the impact resistance of the internal motor structure of the hub geared motor.

[0005] To achieve the above objectives, this utility model mainly provides the following technical solutions:

[0006] An embodiment of this utility model provides a hub geared motor, which includes a fixed output shaft and a housing rotatably sleeved on the fixed output shaft. The housing has an internal accommodating cavity, and a motor structure is provided in the accommodating cavity. The motor structure has a fixed base, a stator, and a rotor. The fixed base is fixedly connected to the fixed output shaft. The stator and the rotor are both disposed on the fixed base. The stator is used to drive the rotor to rotate, so as to drive the housing to rotate through the rotor.

[0007] A bearing is fitted between the fixed base and the housing, and the fixed base provides support to the housing through the bearing.

[0008] In some embodiments, the mounting base provides support for the housing via a single bearing; and / or, the bearing is fitted into the middle of the mounting base.

[0009] In some embodiments, the housing has a first housing and a second housing, the first housing having a first open end and the second housing having a second open end, the first housing being fastened together with the second open end of the second housing to form the receiving cavity between the two.

[0010] The first opening end has an annular flared groove, the bearing is sleeved in the annular flared groove, and the outer ring of the bearing is interference-fitted with the groove wall of the annular flared groove, and the inner ring of the bearing is interference-fitted with the fixed seat; the fixed seat is provided with an annular support platform for providing support for the inner ring of the bearing near the second housing.

[0011] The second housing secures the outer ring of the bearing against the bottom surface of the annular flared groove through the second open end.

[0012] In some embodiments, the motor structure further includes a rotor shaft, through which the rotor drives the housing to rotate; the rotor shaft is located on one axial side of the fixed output shaft, the accommodating cavity has a first side and a second side facing away from each other, the fixed output shaft extends out of the first side, and there is no bearing support between the end of the rotor shaft facing away from the fixed output shaft and the second side.

[0013] In some embodiments, the rotor is sleeved on the outside of the stator, and the rotor is connected to the rotor shaft via a connector so as to drive the rotor shaft to rotate through the connector;

[0014] The connector has a connecting hole at one end opposite to the second side, and the rotor shaft is fixed in the connecting hole at one end away from the fixed output shaft.

[0015] In some embodiments, the end of the rotor shaft opposite to the fixed output shaft does not protrude from the connecting hole.

[0016] In some embodiments, the cavity wall of the accommodating cavity at the second side is a plane, and the end of the connector opposite to the second side is opposite to the plane and there is a gap between them; the end of the rotor shaft away from the fixed output shaft is also opposite to the plane and there is a gap between them.

[0017] This utility model provides a vehicle that includes the hub reduction motor described in any one of the above-mentioned embodiments.

[0018] In some implementations, the vehicle is an electric vehicle, a robotic hub vehicle, or an industrial AGV vehicle.

[0019] By employing the above technical solution, the hub geared motor of this utility model and the vehicle using it have at least the following beneficial effects:

[0020] Compared to the existing technology that places the bearing between the tail of the rotor shaft and the housing, this utility model places the bearing between the fixed seat and the housing. Since the fixed seat has relatively high structural strength, when the housing is subjected to external impact, such as a bump or drop, the fixed seat can absorb and disperse the impact force, thereby making the internal motor structure of the hub geared motor of this utility model more impact-resistant and structurally more stable.

[0021] 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

[0022] 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.

[0023] Figure 1 This is a cross-sectional view of a hub geared motor housing with the first housing hidden, provided by existing technology;

[0024] Figure 2 This is a cross-sectional view of a hub geared motor provided in one embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram showing the bearing installed between the housing and the mounting base.

[0026] Reference numerals: 1. Housing; 2. Fixed output shaft; 3. Gear frame; 4. Gear transmission mechanism; 5. Bearing; 6. Stator; 7. Rotor; 8. Connecting component; 9. Rotor shaft; 10. Accommodating cavity; 11. First housing; 12. Second housing; 13. Transmission gear; 14. Fixed seat; 15. Second bearing; 16. Bearing seat; 17. First bearing; 51. Outer ring; 52. Inner ring; 81. Connecting hole; 101. First side; 102. Second side; 103. Plane; 111. Annular flared groove; 121. Second opening end; 141. Mounting hole; 521. Annular support platform; 1111. Groove wall of the annular flared groove; 1112. Bottom surface of the annular flared groove. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] like Figure 2 As shown in the figure, an embodiment of the present invention discloses a hub geared motor, which includes a fixed output shaft 2 and a housing 1 rotatably sleeved on the fixed output shaft 2. The housing 1 has an internal accommodating cavity 10, within which a motor structure is housed. The motor structure includes a fixed base 14, a stator 6, and a rotor 7. The fixed base 14 is fixedly connected to the fixed output shaft 2, and the fixed output shaft 2 can be sleeved on a gear frame 3. The fixed output shaft 2 is fixedly connected to the fixed base 14 via the gear frame 3, and the gear frame 3 and the fixed base 14 can be fixedly connected by screws or the like. Both the stator 6 and the rotor 7 are mounted on the fixed base 14. The stator 6 is fixed to the fixed base 14, and the rotor 7 is rotatably mounted on the fixed base 14. The stator 6 drives the rotor 7 to rotate, thereby driving the housing 1 to rotate. A bearing 5 is sleeved between the fixed base 14 and the housing 1, and the fixed base 14 provides support to the housing 1 through the bearing 5.

[0031] When the aforementioned hub geared motor is applied to a vehicle, the fixed output shaft 2 of the hub geared motor is fixed to the vehicle, and the housing 1 of the hub geared motor is installed on the wheel hub of the vehicle. When the hub geared motor is started, it drives the wheel hub of the vehicle to rotate through the housing 1.

[0032] Compared to the existing technology that sets the first bearing 17 between the tail of the rotor shaft 9 and the housing 1, this utility model sets the bearing 5 between the fixed seat 14 and the housing 1. Since the fixed seat 14 has relatively high structural strength, when the housing 1 is subjected to external impact, such as a bump or a drop impact, the fixed seat 14 can absorb and disperse the impact force, thereby making the internal motor structure of the hub geared motor of this utility model more impact-resistant and more stable.

[0033] The aforementioned bearing 5 can be a large bearing, serving a supporting and fixing function, reducing the force on the motor tail end. When the housing 1 is subjected to external impact, it can absorb and disperse the impact force, protecting the internal motor structure from impact damage, and improving the internal structural stability and product impact resistance. The hub geared motor of this utility model has high stability and strong impact resistance.

[0034] In some implementations, such as Figure 2 As shown, the aforementioned mounting base 14 can provide support for the housing 1 through a single bearing 5, thus saving costs.

[0035] In some implementations, such as Figure 2 As shown, the aforementioned bearing 5 can be fitted into the middle of the fixed seat 14, which helps to make the force on the fixed seat 14 more even.

[0036] To facilitate the installation of the aforementioned bearing 5, in some embodiments, such as Figure 2 and 3 As shown, the aforementioned housing 1 has a first housing 11 and a second housing 12. The first housing 11 has a first open end, and the second housing 12 has a second open end 121. The first housing 11 is fastened together with the second open end 121 of the second housing 12 through the first open end to form the aforementioned receiving cavity 10 between them. The first housing 11 and the second housing 12 are preferably detachably connected, for example, they can be connected by screws, which facilitates maintenance.

[0037] The first housing 11 has an annular flared groove 111 at its first open end. The bearing 5 is fitted within this annular flared groove 111, and has an outer ring 51 and an inner ring 52 that can rotate relative to the outer ring 51. The bearing 5 is installed within the annular flared groove 111, with the outer ring 51 of the bearing interference-fitted with the groove wall 1111, and the inner ring 52 of the bearing interference-fitted with the fixed seat 14. The fixed seat 14 is provided with an annular support platform 521, which provides support for the side of the inner ring 52 of the bearing closest to the second housing 12. The second housing 12 secures the outer ring 51 of the bearing against the bottom surface 1112 of the annular flared groove through its second open end 121.

[0038] In the above example, the first housing 11 cooperates with the annular support platform 521 on the fixed seat 14 and the second opening end 121 of the second housing 12 through the annular flared groove 111, so that the bearing 5 can be supported between the fixed seat 14 and the housing 1 to realize the installation of the bearing 5.

[0039] In some implementations, such as Figure 2 As shown, the motor structure also includes a rotor shaft 9, through which the rotor 7 drives the housing 1 to rotate. Specifically, the inner wall of the housing 1 is provided with transmission teeth 13. The hub geared motor may include a gear ring, which is fixed to the inner wall of the housing 1 and has the aforementioned transmission teeth 13. The rotor shaft 9 is connected to the transmission teeth 13 via a gear transmission mechanism 4 to drive the housing 1 to rotate. The gear transmission mechanism 4 is disposed between the gear carrier 3 and the fixed base 14. The gear transmission mechanism 4 may be a planetary gear transmission mechanism, in which one end of the axle of the planetary gear is mounted on the gear carrier 3 and the other end is mounted on the fixed base 14.

[0040] The aforementioned rotor shaft 9 is located on one axial side of the fixed output shaft 2. The aforementioned accommodating cavity 10 has a first side 101 and a second side 102 facing away from each other. The fixed output shaft 2 extends out of the first side 101 of the accommodating cavity 10, and there is no bearing support between the end of the rotor shaft 9 facing away from the fixed output shaft 2 and the second side 102.

[0041] Compared to the existing technology that designs a bearing between the tail end of the rotor shaft 9 and the housing 1 for support, in the above example, since there is no bearing support between the tail end of the rotor shaft 9, that is, the end of the rotor shaft 9 away from the fixed output shaft 2, and the second side 102 of the accommodating cavity 10, the force on the tail end of the motor can be reduced, and the internal structural stability and product impact resistance can be improved.

[0042] To achieve the aforementioned function of rotor 7 driving rotor shaft 9 to rotate, in some embodiments, such as Figure 2As shown, rotor 7 is sleeved on the outside of stator 6. Rotor 7 is connected to rotor shaft 9 via connector 8. Stator 6 drives rotor 7 to rotate, causing rotor 7 to drive rotor shaft 9 to rotate via connector 8. Connector 8 has a connecting hole 81 at one end opposite to the second side 102, and the end of rotor shaft 9 away from fixed output shaft 2 is fixed in connecting hole 81.

[0043] In the above example, the end of the rotor shaft 9 that is away from the fixed output shaft 2 can be interference-fitted with the connecting hole 81. When the stator 6 drives the rotor 7 to rotate, the rotor 7 drives the rotor shaft 9 to rotate through the connecting piece 8, thus realizing the function of the stator 6 driving the rotor shaft 9 to rotate.

[0044] In some implementations, such as Figure 2 As shown, the end of the rotor shaft 9 that is away from the fixed output shaft 2 does not protrude from the aforementioned connecting hole 81, which helps to shorten the length of the rotor shaft 9 and reduce costs.

[0045] In some implementations, such as Figure 2 As shown, the cavity wall of the aforementioned accommodating cavity 10 at the second side 102 is a plane 103. The end of the connector 8 opposite to the second side 102 is opposite to the plane 103, and there is a gap between them. Similarly, the end of the rotor shaft 9 away from the fixed output shaft 2 is also opposite to the plane 103, and there is a gap between them.

[0046] Compared to the prior art where the bearing seat 16 is designed on the second side 102 of the accommodating cavity 10, in the above example, since the cavity wall of the accommodating cavity 10 at the second side 102 is a plane 103, the structure of the bearing seat 16 is omitted, which is beneficial for convenient processing.

[0047] In order to install the rotor shaft 9, in some embodiments, such as Figure 2 As shown, the inner side of the aforementioned fixed base 14 is provided with a mounting hole 141, and the rotor shaft 9 is rotatably installed in the mounting hole 141. A second bearing 15 is sleeved between the rotor shaft 9 and the inner wall of the mounting hole 141 for support. There can be two or more second bearings 15, which are arranged sequentially along the axial direction of the rotor shaft 9. The rotor shaft 9 and the aforementioned fixed output shaft 2 can be arranged coaxially.

[0048] In some embodiments, the present invention also provides a vehicle that may include the hub geared motor described above. Because the vehicle uses the aforementioned hub geared motor, compared to the prior art where a bearing 5 is placed between the tail of the rotor shaft 9 and the housing 1, the present invention places the bearing 5 between the fixed seat 14 and the housing 1. Since the fixed seat 14 has relatively high structural strength, when the housing 1 is subjected to external impacts, such as bumps or drops, the fixed seat 14 can absorb and disperse the impact force, thereby making the internal motor structure of the hub geared motor of the present invention more impact-resistant and structurally more stable.

[0049] In some implementations, the aforementioned vehicle may be an electric vehicle, a robotic hub vehicle, or an industrial AGV vehicle, etc.

[0050] 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 hub-mounted geared motor, characterized in that, The device includes a fixed output shaft (2) and a housing (1) rotatably mounted on the fixed output shaft (2). The housing (1) has an internal cavity (10) and a motor structure is provided inside the cavity (10). The motor structure has a fixed base (14), a stator (6), and a rotor (7). The fixed base (14) is fixedly connected to the fixed output shaft (2). The stator (6) and the rotor (7) are both mounted on the fixed base (14). The stator (6) is used to drive the rotor (7) to rotate, so as to drive the housing (1) to rotate through the rotor (7). A bearing (5) is sleeved between the fixed base (14) and the housing (1), and the fixed base (14) provides support to the housing (1) through the bearing (5).

2. The hub geared motor as described in claim 1, characterized in that, The mounting base (14) provides support to the housing (1) by a single bearing (5); and / or, the bearing (5) is fitted in the middle of the mounting base (14).

3. The hub geared motor as described in claim 1, characterized in that, The housing (1) has a first housing (11) and a second housing (12), the first housing (11) has a first opening end, and the second housing (12) has a second opening end (121). The first housing (11) is fastened together with the second opening end (121) of the second housing (12) through the first opening end to form the accommodating cavity (10) between the two. The first opening end has an annular flared groove (111), the bearing (5) is sleeved in the annular flared groove (111), and the outer ring (51) of the bearing is interference-fitted with the groove wall (1111) of the annular flared groove, and the inner ring (52) of the bearing is interference-fitted with the fixed seat (14); the fixed seat (14) is provided with an annular support platform (521) for providing support for the inner ring (52) of the bearing near the second housing (12); The second housing (12) secures the outer ring (51) of the bearing against the bottom surface (1112) of the annular flared groove through the second open end (121).

4. The hub geared motor as described in claim 1, characterized in that, The motor structure also includes a rotor shaft (9), and the rotor (7) drives the housing (1) to rotate through the rotor shaft (9); The rotor shaft (9) is located on one axial side of the fixed output shaft (2), the accommodating cavity (10) has a first side (101) and a second side (102) facing away from each other, the fixed output shaft (2) extends out of the first side (101), and there is no bearing support between the end of the rotor shaft (9) facing away from the fixed output shaft (2) and the second side (102).

5. The hub geared motor as described in claim 4, characterized in that, The rotor (7) is sleeved on the outside of the stator (6), and the rotor (7) is connected to the rotor shaft (9) through the connector (8) so as to drive the rotor shaft (9) to rotate through the connector (8); The connector (8) has a connecting hole (81) at one end opposite to the second side (102), and the rotor shaft (9) is fixed in the connecting hole (81) at one end away from the fixed output shaft (2).

6. The hub geared motor as described in claim 5, characterized in that, The end of the rotor shaft (9) that is away from the fixed output shaft (2) does not protrude from the connecting hole (81).

7. The hub geared motor as described in claim 5 or 6, characterized in that, The cavity wall of the accommodating cavity (10) at the second side (102) is a plane (103). The end of the connector (8) opposite to the second side (102) is opposite to the plane (103) and there is a gap between them. The end of the rotor shaft (9) away from the fixed output shaft (2) is also opposite to the plane (103) and there is a gap between them.

8. A vehicle, characterized in that, The wheel hub geared motor includes any one of claims 1 to 7.

9. The vehicle as described in claim 8, characterized in that, The vehicle can be an electric vehicle, a robotic hub vehicle, or an industrial AGV vehicle.

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