Double-shaft planet hub gear motor and vehicle applying same

Abstract

The utility model relates to a double-shaft planetary wheel hub gear motor, which comprises a fixed shaft, a motor assembly, a planetary speed reducing mechanism and a wheel hub shell rotationally assembled on the fixed shaft, the motor assembly and the planetary speed reducing mechanism are both arranged in the wheel hub shell, and the motor assembly drives the wheel hub shell to rotate around the axis of the fixed shaft through the planetary speed reducing mechanism; the hub shell is provided with a first end and a second end which are opposite, the fixing shaft extends out of the first end of the hub shell, a supporting shaft is arranged at the second end of the hub shell, the axis of the supporting shaft coincides with the axis of the fixing shaft, and the supporting shaft and the hub shell are relatively fixed. Compared with a cantilever type installation mode that an existing hub gear motor is connected with an external fixing machine frame only through a fixing shaft, the double-shaft planet hub gear motor can be supported on the external fixing machine frame through the fixing shaft and the supporting shaft together, and therefore supporting is firmer, and stability is better.

Description

Technical Field

[0001] The utility model relates to the technical field of hub motors, in particular to a dual-shaft planetary hub reduction motor and a vehicle using the same. Background Art

[0002] The wheel hub reduction motor in the prior art is generally a product used on vehicle wheels. The existing wheel hub reduction motor generally has a fixed shaft, a motor assembly, a planetary reduction mechanism and a wheel hub shell rotatably assembled on the fixed shaft. The motor assembly and the planetary reduction mechanism are both arranged in the wheel hub shell, and the motor assembly drives the wheel hub shell to rotate around the axis of the fixed shaft through the planetary reduction mechanism.

[0003] Among them, the fixed shaft of the existing wheel hub reduction motor is generally a cantilever structure, and the wheel hub reduction motor is suspended on the external frame through the fixed shaft. The cantilever structure support of the wheel hub reduction motor is not firm enough and has low stability, so it is necessary to improve it. Utility Model Content

[0004] In view of this, the utility model provides a dual-axis planetary hub reduction motor and a vehicle using the same, and the main technical problem to be solved is: how to provide installation stability of the hub reduction motor.

[0005] In order to achieve the above purpose, the utility model mainly provides the following technical solutions:

[0006] The embodiment of the utility model provides a dual-axis planetary hub reduction motor, which comprises: a fixed shaft, a motor assembly, a planetary reduction mechanism and a hub shell rotatably assembled on the fixed shaft, the motor assembly and the planetary reduction mechanism are both arranged in the hub shell, and the motor assembly drives the hub shell to rotate around the axis of the fixed shaft through the planetary reduction mechanism;

[0007] The hub shell has a first end and a second end facing each other, the fixed shaft extends out of the first end of the hub shell, and a support shaft is provided at the second end of the hub shell. The axes of the support shaft and the fixed shaft coincide, and the support shaft and the hub shell remain relatively fixed.

[0008] In some embodiments, the support shaft is integrally formed on the hub shell.

[0009] In some embodiments, the hub shell is a two-half structure, namely a first shell and a second shell, and the first shell and the second shell are detachably connected.

[0010] In some embodiments, the dual-axis planetary hub reduction motor further includes a fixing seat, which is disposed in the hub shell and fixedly connected to the fixing shaft;

[0011] Wherein, the planetary reduction mechanism comprises a sun gear and a planetary gear, the sun gear and the planetary gear are both rotatably arranged on the fixed seat, the shell wall of the hub shell is provided with transmission teeth along the circumferential direction, and the planetary gear is meshed between the sun gear and the transmission teeth;

[0012] The motor assembly is used to drive the sun gear to rotate, so that the sun gear drives the hub shell to rotate around the axis of the fixed shaft through the planetary gears.

[0013] In some embodiments, the dual-axis planetary hub reduction motor further comprises a fixing cover, and the fixing cover is disposed on the fixing seat;

[0014] The planetary gear is arranged between the fixing seat and the fixing cover, and the planetary gear has a wheel axle; one end of the wheel axle is installed on the fixing seat, and the other end is installed on the fixing cover.

[0015] In some embodiments, one end of the fixing seat close to the fixing cover has a sink groove, and the planetary gear is located in the sink groove.

[0016] In some embodiments, the motor assembly includes a stator, a rotor and a rotor shaft, the stator is arranged on the fixing seat, the rotor is sleeved on the outside of the stator, the rotor is fixedly connected to the rotor shaft through a connecting member, and the rotor shaft is fixedly connected to the sun gear;

[0017] The stator is used to drive the rotor to rotate, so that the rotor drives the rotor shaft to rotate through the connecting member, and the rotor shaft drives the sun gear to rotate.

[0018] In some embodiments, the fixing seat has a through hole, the rotor shaft passes through the through hole, a first bearing is sleeved between the rotor shaft and the inner wall of the through hole, and the inner wall of the through hole provides support for the rotor shaft through the first bearing;

[0019] And / or, a convex ring is provided on the inner wall of the hub shell, and the sun gear is arranged at one end of the rotor shaft; the other end of the rotor shaft extends into the convex ring, and a second bearing is provided between the convex ring and the inner wall of the convex ring; the convex ring provides support for the rotor shaft through the second bearing.

[0020] In some embodiments, the connecting member is disc-shaped, the connecting member is sleeved on the rotor shaft, and the connecting member is fixedly connected to the rotor through its outer edge.

[0021] An embodiment of the utility model further provides a vehicle, which comprises a fixed frame and a double-shaft planetary hub reduction motor as described in any one of the above;

[0022] Wherein, the fixed shaft is fixed on the fixed frame, and the supporting shaft is rotatably mounted on the fixed frame.

[0023] By means of the above technical solution, the dual-axis planetary hub reduction motor of the utility model and the vehicle using the same have at least the following beneficial effects:

[0024] Compared with the cantilever installation method of the existing hub reduction motor which is connected to the external fixed frame only by a fixed shaft, the dual-axis planetary hub reduction motor of the utility model can be supported on the external fixed frame by a fixed shaft and a supporting shaft, so that the support is more reliable and the stability is better.

[0025] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0027] Figure 1 It is a structural schematic diagram of a dual-axis planetary hub reduction motor provided by an embodiment of the utility model;

[0028] Figure 2 It is a cross-sectional view of the double-shaft planetary hub reduction motor with the first housing hidden;

[0029] Figure 3 It is a partial structural diagram of a dual-axis planetary hub reduction motor.

[0030] Figure numerals: 1. hub shell; 2. fixed shaft; 3. support shaft; 4. fixed seat; 5. sun gear; 6. planetary gear; 7. rotor shaft; 8. stator; 9. rotor; 10. connecting piece; 11. first shell; 12. second shell; 13. first bearing; 14. second bearing; 15. convex ring; 16. third bearing; 17. fixing cover; 41. groove; 42. through hole; 61. wheel axle; 101. first end; 102. second end; 103. reinforcing rib; 111. transmission tooth. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0034] like Figures 1 to 3 As shown, a dual-axis planetary hub reduction motor proposed in one embodiment of the utility model includes a fixed shaft 2, a motor assembly, a planetary reduction mechanism, and a hub shell 1 rotatably assembled on the fixed shaft 2. The motor assembly and the planetary reduction mechanism are both arranged in the hub shell 1. The motor assembly drives the hub shell 1 to rotate around the axis of the fixed shaft 2 through the planetary reduction mechanism.

[0035] The hub shell 1 has a first end 101 and a second end 102 facing each other, the fixed shaft 2 extends out of the first end 101 of the hub shell 1, and the second end 102 of the hub shell 1 is provided with a support shaft 3. The axes of the support shaft 3 and the fixed shaft 2 coincide, and the support shaft 3 and the hub shell 1 remain relatively fixed.

[0036] In the above example, the dual-axis planetary hub reduction motor of the present invention can be supported on an external fixed frame together with a fixed shaft 2 and a support shaft 3, wherein the fixed shaft 2 is fixedly connected to the external fixed frame, and the support shaft 3 is rotationally matched with the external fixed frame.

[0037] Compared with the cantilever installation method of the existing hub reduction motor which is connected to the external fixed frame only through a fixed shaft, the dual-axis planetary hub reduction motor of the utility model can be supported on the external fixed frame together with the fixed shaft 2 and the support shaft 3, so that the support is more reliable and the stability is better.

[0038] In some embodiments, Figure 2 As shown, the aforementioned support shaft 3 can be integrally formed on the hub shell 1 , which can improve the connection stability between the support shaft 3 and the hub shell 1 .

[0039] In some embodiments, Figures 1 to 3 As shown, the aforementioned hub shell 1 can be a two-half structure, and the two halves of the hub shell 1 are respectively a first shell 11 and a second shell 12. The first shell 11 and the second shell 12 are detachably connected, for example, the two can be detachably connected by screws.

[0040] In the above example, the hub shell 1 is provided as a two-half structure, which facilitates the processing of the hub shell 1 .

[0041] In some embodiments, Figure 1 As shown, the aforementioned fixed shaft 2 can extend from the first shell 11 of the hub shell 1 , and the support shaft 3 is fixed on the second shell 12 of the hub shell 1 , for example, the support shaft 3 can be integrally formed on the second shell 12 .

[0042] In some embodiments, Figure 2 and Figure 3 As shown, the aforementioned dual-axis planetary hub reduction motor also includes a fixed seat 4. The fixed seat 4 is arranged in the hub shell 1, and the fixed seat 4 is fixedly connected to the fixed shaft 2. Among them, the aforementioned planetary reduction mechanism includes a sun gear 5 and a planetary gear 6, and the sun gear 5 and the planetary gear 6 can be rotatably arranged on the fixed seat 4. The shell wall of the aforementioned hub shell 1 is provided with transmission teeth 111 along the circumferential direction, and the transmission teeth 111 can be integrally formed on the shell wall of the hub shell 1. The planetary gear 6 is meshed between the sun gear 5 and the transmission teeth 111. The aforementioned motor assembly is used to drive the sun gear 5 to rotate, so that the sun gear 5 drives the hub shell 1 to rotate around the axis of the fixed shaft 2 through the planetary gear 6, so as to achieve the purpose of the motor assembly driving the hub shell 1 to rotate around the axis of the fixed shaft 2 through the planetary reduction mechanism.

[0043] It should be noted here that: Figure 3 As shown, the number of the planetary gears 6 can be more than two, and they are evenly distributed in a circular shape around the axis of the sun gear 5. In a specific application example, the number of the planetary gears 6 can be 3. Among them, by providing a larger number of planetary gears 6, the stability of the transmission can be improved.

[0044] In some embodiments, Figure 2 As shown, the aforementioned dual-axis planetary hub reduction motor may further include a fixing cover 17, the fixing cover 17 is set on the fixing seat 4, and the fixing cover 17 is fixedly connected to the fixing seat 4, for example, the two can be fixed by screws. The aforementioned planetary gear 6 can be set between the fixing seat 4 and the fixing cover 17, and the planetary gear 6 has an axle 61. One end of the axle 61 is installed on the fixing seat 4, and the other end is installed on the fixing cover 17.

[0045] In the above example, by arranging the planetary gear 6 between the fixing seat 4 and the fixing cover 17 , housing protection can be provided for the planetary gear 6 .

[0046] In some embodiments, Figure 2 As shown, the aforementioned fixed shaft 2 can be fixed on the fixed cover 17, so as to be fixedly connected with the fixed seat 4 through the fixed cover 17. The fixed shaft 2 can be fixed on the fixed cover 17 by riveting. A third bearing 16 can be provided between the fixed shaft 2 and the hub shell 1, and the fixed shaft 2 provides support for the hub shell 1 through the third bearing 16.

[0047] In some embodiments, Figure 2 As shown, one end of the fixing seat 4 close to the fixing cover 17 may have a recessed groove 41, and the planetary gear 6 is located in the recessed groove 41. By providing the recessed groove 41, the space on the fixing seat 4 can be fully utilized, which is conducive to making the assembly structure more compact.

[0048] In some embodiments, the aforementioned motor assembly may include a stator 8, a rotor 9 and a rotor shaft 7. The stator 8 is disposed on the fixing seat 4, for example, the stator 8 may be sleeved on the outside of the fixing seat 4. The rotor 9 is sleeved on the outside of the stator 8. The rotor 9 is fixedly connected to the rotor shaft 7 through a connector 10. The rotor shaft 7 is fixedly connected to the sun gear 5, and the sun gear 5 may be integrally formed on the rotor shaft 7, and the axis of the sun gear 5 coincides with the axis of the rotor shaft 7. Among them, the stator 8 is used to drive the rotor 9 to rotate, so that the rotor 9 drives the rotor shaft 7 to rotate through the connector 10, so that the rotor shaft 7 drives the sun gear 5 to rotate, so that the purpose of the motor assembly driving the sun gear 5 to rotate can be achieved.

[0049] In some embodiments, Figure 2 As shown, the aforementioned connecting member 10 may be disc-shaped, and the connecting member 10 is sleeved on the rotor shaft 7 . The connecting member 10 is fixedly connected to the rotor 9 through its outer edge, so that the rotor 9 can drive the rotor shaft 7 to rotate through the connecting member 10 .

[0050] In some embodiments, the fixing seat 4 has a through hole 42, through which the rotor shaft 7 passes. A first bearing 13 is sleeved between the rotor shaft 7 and the inner wall of the through hole 42, and the inner wall of the through hole 42 provides support for the rotor shaft 7 through the first bearing 13.

[0051] In the above example, by passing the rotor shaft 7 through the fixing seat 4, the space on the fixing seat 4 can be fully utilized, which is conducive to making the assembly structure more compact. In addition, the first bearing 13 can improve the rotation stability of the rotor shaft 7.

[0052] In some embodiments, Figure 2 As shown, the number of the first bearings 13 can be more than two, and they are arranged in sequence along the axis of the rotor shaft 7. A larger number of first bearings 13 can improve the support stability of the rotor shaft 7.

[0053] In some embodiments, Figure 2 As shown, a convex ring 15 may be provided on the inner wall of the hub shell 1, and the sun gear 5 is provided at one end of the rotor shaft 7. The other end of the rotor shaft 7 extends into the convex ring 15, and a second bearing 14 is provided between the rotor shaft 7 and the inner wall of the convex ring 15. The convex ring 15 provides support for the rotor shaft 7 through the second bearing 14.

[0054] In the above example, the second bearing 14 is provided to support the end of the rotor shaft 7 , so that the stability of the rotation of the rotor shaft 7 can be improved.

[0055] In some embodiments, Figure 1 As shown, the aforementioned wheel hub shell 1 may be cylindrical, and the outer wall of the wheel hub shell 1 may have two or more reinforcing ribs 103 arranged in sequence along the circumferential direction. Each reinforcing rib 103 extends along the centerline direction of the wheel hub shell 1. Among them, each reinforcing rib 103 is used to be plugged into the plug hole of the external wheel hub in a one-to-one correspondence. Each reinforcing rib 103 may be integrally formed on the wheel hub shell 1.

[0056] In the above example, the reinforcing ribs 103 are provided to make the connection between the hub shell 1 and the inner cavity of the hub more stable, which is beneficial to improving the connection stability between the hub shell 1 and the external hub.

[0057] In some embodiments, the aforementioned reinforcing rib 103 has a rectangular cross-sectional profile in a cross section perpendicular to the center line of the hub shell 1 .

[0058] The embodiment of the utility model further provides a vehicle, which comprises a fixed frame and any one of the above-mentioned dual-axis planetary hub reduction motors. The aforementioned fixed shaft 2 is fixed to the fixed frame, and the support shaft 3 is rotatably mounted on the fixed frame. The fixed frame may be provided with an axis hole, and the support shaft 3 may be assembled in the axis hole and rotatably cooperate with the axis hole.

[0059] In the above example, since the vehicle adopts the above-mentioned dual-axis planetary hub reduction motor, compared with the cantilever installation method in which the existing hub reduction motor is only connected to the external fixed frame through a fixed shaft, the dual-axis planetary hub reduction motor of the utility model can be supported on the external fixed frame together with the fixed shaft 2 and the support shaft 3, so that the support is more secure and the stability is better.

[0060] It should be noted here that the above-mentioned vehicle can be a small electric vehicle, a robot with wheels, or an industrial AGV, etc.

[0061] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A dual-axis planetary hub reduction motor, characterized in that: It comprises a fixed shaft (2), a motor assembly, a planetary reduction mechanism and a wheel hub shell (1) rotatably mounted on the fixed shaft (2), the motor assembly and the planetary reduction mechanism both being arranged in the wheel hub shell (1), and the motor assembly drives the wheel hub shell (1) to rotate around the axis of the fixed shaft (2) through the planetary reduction mechanism; The wheel hub shell (1) has a first end (101) and a second end (102) which are opposite to each other; the fixed shaft (2) extends out of the first end (101) of the wheel hub shell (1); the second end (102) of the wheel hub shell (1) is provided with a support shaft (3); the axes of the support shaft (3) and the fixed shaft (2) coincide with each other; the support shaft (3) and the wheel hub shell (1) remain relatively fixed.

2. The dual-axis planetary hub reduction motor according to claim 1, characterized in that: The support shaft (3) is integrally formed on the wheel hub shell (1).

3. The dual-axis planetary hub reduction motor according to claim 1, characterized in that: The wheel hub shell (1) is a two-half structure, comprising a first shell (11) and a second shell (12), and the first shell (11) and the second shell (12) are detachably connected.

4. The dual-shaft planetary hub reduction motor according to any one of claims 1 to 3, characterized in that: It also comprises a fixing seat (4), wherein the fixing seat (4) is arranged in the wheel hub shell (1) and is fixedly connected to the fixing shaft (2); The planetary reduction mechanism comprises a sun gear (5) and a planetary gear (6); the sun gear (5) and the planetary gear (6) are both rotatably arranged on the fixed seat (4); a transmission tooth (111) is circumferentially arranged on the shell wall of the hub shell (1); and the planetary gear (6) is meshed between the sun gear (5) and the transmission tooth (111); The motor assembly is used to drive the sun gear (5) to rotate, so that the sun gear (5) drives the hub shell (1) to rotate around the axis of the fixed shaft (2) through the planetary gears (6).

5. The dual-axis planetary hub reduction motor according to claim 4, characterized in that: It also includes a fixing cover (17), wherein the fixing cover (17) is arranged on the fixing seat (4); The planetary gear (6) is arranged between the fixing seat (4) and the fixing cover (17), and the planetary gear (6) has a wheel axle (61); one end of the wheel axle (61) is mounted on the fixing seat (4), and the other end is mounted on the fixing cover (17).

6. The dual-axis planetary hub reduction motor according to claim 5, characterized in that: One end of the fixing seat (4) close to the fixing cover (17) has a sink groove (41), and the planetary gear (6) is located in the sink groove (41).

7. The dual-axis planetary hub reduction motor according to claim 4, characterized in that: The motor assembly comprises a stator (8), a rotor (9) and a rotor shaft (7); the stator (8) is arranged on the fixing seat (4); the rotor (9) is sleeved on the outer side of the stator (8); the rotor (9) is fixedly connected to the rotor shaft (7) via a connecting piece (10); and the rotor shaft (7) is fixedly connected to the sun gear (5); The stator (8) is used to drive the rotor (9) to rotate, so that the rotor (9) drives the rotor shaft (7) to rotate through the connecting member (10), so that the rotor shaft (7) drives the sun gear (5) to rotate.

8. The dual-axis planetary hub reduction motor according to claim 7, characterized in that: The fixing seat (4) has a through hole (42), the rotor shaft (7) passes through the through hole (42), a first bearing (13) is sleeved between the rotor shaft (7) and the inner wall of the through hole (42), and the inner wall of the through hole (42) provides support for the rotor shaft (7) through the first bearing (13); And / or, a convex ring (15) is provided on the inner wall of the hub shell (1), and the sun gear (5) is arranged at one end of the rotor shaft (7); the other end of the rotor shaft (7) extends into the convex ring (15), and a second bearing (14) is provided between the convex ring (15) and the inner wall of the convex ring (15); the convex ring (15) provides support for the rotor shaft (7) through the second bearing (14).

9. The dual-axis planetary hub reduction motor according to claim 7, characterized in that: The connecting piece (10) is disc-shaped, the connecting piece (10) is sleeved on the rotor shaft (7), and the connecting piece (10) is fixedly connected to the rotor (9) via its outer edge.

10. A vehicle, characterized in that: It comprises a fixed frame and a dual-axis planetary hub reduction motor as claimed in any one of claims 1 to 9; Wherein, the fixed shaft (2) is fixed on the fixed frame, and the supporting shaft (3) is rotatably mounted on the fixed frame.

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