Embedded planetary gear transmission hub gear motor and vehicle

Abstract

The utility model discloses an embedded planetary gear transmission hub gear motor and a vehicle, and the hub gear motor comprises a fixed output shaft, an inner gear ring housing, a stator, a rotor, a first speed reducing mechanism, and a second speed reducing mechanism. The stator and the fixed output shaft are kept relatively fixed, the first speed reducing mechanism comprises a motor gear, a first planetary gear and a first inner gear ring, the first planetary gear is meshed between the motor gear and the first inner gear ring, the first inner gear ring and the fixed output shaft are kept relatively fixed, and the rotor is used for driving the motor gear to rotate; the motor gear is used for driving the first planetary gear to revolve around the center line of the motor gear, so that the first planetary gear drives the inner gear ring shell to rotate through the second speed reducing mechanism; the first inner gear ring is located in an inner hole of the stator, and the first planetary gear and the motor gear are located on the inner side of the first inner gear ring. The hub gear motor is small in size, light in weight, high in efficiency, strong in bearing capacity and long in service life.

Description

Technical Field

[0001] The utility model relates to the technical field of hub reduction motors, in particular to an embedded planetary gear transmission hub reduction motor and a vehicle. Background Art

[0002] The wheel hub reduction motor in the prior art is generally used on the wheels of vehicles, and the output shaft drives the planetary structure to operate. Its technical defects include: large size, diameter range of more than 10 cm, heavy weight, energy consumption, slow speed, insufficient torque, etc. The torque of the existing planetary wheel hub reduction motor has certain limitations, such as low load capacity and short endurance. Utility Model Content

[0003] In view of this, the utility model provides an embedded planetary gear transmission hub reduction motor and a vehicle, and the main technical problem to be solved is: how to reduce the volume of the hub reduction motor.

[0004] In order to achieve the above purpose, the utility model mainly provides the following technical solutions:

[0005] The embodiment of the utility model provides an embedded planetary gear transmission hub reduction motor, which includes: a fixed output shaft, an inner gear ring housing, a stator, a rotor, a first reduction mechanism and a second reduction mechanism;

[0006] The stator and the fixed output shaft are relatively fixed, the stator is used to drive the rotor to rotate, and the inner gear ring housing is rotatably arranged on the fixed output shaft;

[0007] The first reduction mechanism comprises a motor gear, a first planetary gear and a first inner gear ring, the first planetary gear is meshed between the motor gear and the first inner gear ring, the first inner gear ring is relatively fixed to the fixed output shaft, the rotor is used to drive the motor gear to rotate; the motor gear is used to drive the first planetary gear to revolve around the center line of the motor gear, so that the first planetary gear drives the inner gear ring housing to rotate through the second reduction mechanism;

[0008] The first inner gear ring is located in the inner hole of the stator, and the first planetary gear and the motor gear are both located on the inner side of the first inner gear ring.

[0009] In some embodiments, the rotor is sleeved on the outside of the stator, and the rotor is fixedly connected to the axle of the motor gear via a first connecting member, so that the rotor drives the motor gear to rotate via the axle of the motor gear.

[0010] In some embodiments, the first connecting member has a sleeve section that is sleeved on the axle of the motor gear, and the first inner gear ring has an annular connecting section; the sleeve section extends into the annular connecting section, and a first bearing is sleeved between the sleeve section and the annular connecting section.

[0011] In some embodiments, the fixed output shaft is a single-sided output shaft; the hub reduction motor also includes an end cover, which is located on the side of the hub reduction motor away from the fixed output shaft, and the end cover is arranged on the inner ring housing, and the end cover encloses the axle of the motor gear inside the hub reduction motor.

[0012] In some embodiments, the second reduction mechanism includes a sun gear, a second planetary gear, and a second inner gear ring; the hub reduction motor includes a second connecting member, the first planetary gear has a first axle, the first axle is arranged on the second connecting member, the second connecting member is sleeved on the axle of the sun gear, the second planetary gear is meshed between the sun gear and the second inner gear ring, and the second inner gear ring is fixed on the inner gear ring housing;

[0013] Among them, the first planetary gear is used to drive the second connecting member to rotate through the first axle when it revolves around the center line of the motor gear, so that the second connecting member drives the sun gear to rotate; the sun gear drives the second inner ring to rotate through the second planetary gear, so that the second inner ring drives the inner ring housing to rotate.

[0014] In some embodiments, the embedded planetary gear transmission hub reduction motor further includes a stator seat, and the stator seat and the fixed output shaft are relatively fixed;

[0015] The second planetary gear is rotatably disposed on the stator seat, and the first inner gear ring is disposed on the stator seat to be relatively fixed with the fixed output shaft through the stator seat.

[0016] In some embodiments, the fixed output shaft has a wiring hole penetrating through both ends of the axial direction, and the fixed output shaft has a first end and a second end opposite to each other, the first end is located inside the inner gear ring housing, and the second end extends out of the inner gear ring housing;

[0017] Wherein, the side surface of the first end has a wire hole connected to the wiring hole.

[0018] In some embodiments, a rectangular reinforcing rib is provided on the outer side of the inner gear ring housing, and the rectangular reinforcing rib extends from one axial side to the other side of the inner gear ring housing, and the rectangular reinforcing rib is used to be embedded in the mounting groove of the inner cavity of the wheel hub.

[0019] The utility model also provides a vehicle, which may include any one of the above-mentioned embedded planetary gear transmission hub reduction motors.

[0020] In some embodiments, the vehicle is an electric vehicle, a robotic hub vehicle, or an industrial AGV vehicle.

[0021] By means of the above technical solution, the embedded planetary gear transmission hub reduction motor and the vehicle of the utility model have at least the following beneficial effects:

[0022] 1. By arranging the motor gear, the first planetary gear and the first inner gear ring of the first reduction mechanism in the inner hole of the stator, the space of the inner hole of the stator can be effectively utilized, so that the structure of the hub reduction motor of the utility model is more compact, the volume is smaller, and the consumption of materials is reduced and the cost is reduced.

[0023] 2. Make full use of the internal space of the stator to do the first-stage deceleration and then output the second deceleration mechanism to drive the entire inner gear ring housing to rotate. Among them, the first deceleration mechanism and the second deceleration mechanism cooperate to form a two-stage deceleration transmission. The speed ratio is increased to improve the performance of the motor. It has the advantage of using the internal space of the motor to do the first-stage deceleration without increasing the longitudinal space while increasing the output torque.

[0024] 3. The rectangular reinforcement ribs are provided to improve the connection stability between the inner gear ring housing and the wheel hub. The rectangular reinforcement ribs have a high degree of fit with the wheel hub and have a strong bearing capacity.

[0025] 4. The hub reduction motor of the utility model has small size, light weight, high efficiency, strong load-bearing capacity and long service life.

[0026] 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

[0027] 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.

[0028] Figure 1 It is a structural schematic diagram of an embedded planetary gear transmission hub reduction motor provided by an embodiment of the utility model;

[0029] Figure 2 yes Figure 1 Cross-sectional view of the mid-wheel hub reduction motor;

[0030] Figure 3 is a schematic diagram reflecting the meshing of the first planetary gear between the motor gear and the first internal gear ring;

[0031] Figure 4 is a schematic diagram reflecting the meshing of the second planetary gear between the sun gear and the second internal gear ring;

[0032] Figure 5 Schematic diagram of the structure of the first connecting member.

[0033] Figure numerals: 1. fixed output shaft; 2. inner ring gear housing; 3. stator; 4. rotor; 5. first connecting member; 6. motor gear; 7. first planetary gear; 8. second connecting member; 9. first inner ring gear; 10. stator seat; 11. first end; 12. second end; 13. second planetary gear; 14. gear rack; 15. sun gear; 16. first bearing; 17. second bearing; 18. end cover; 21. second inner ring gear; 31. inner hole; 51. annular flange; 52. sleeve section; 61. axle of motor gear; 71. first axle; 91. annular connecting section; 100. groove; 101. wiring hole; 201. rectangular reinforcement rib; 151. axle of sun gear. DETAILED DESCRIPTION

[0034] 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.

[0035] 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.

[0036] 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.

[0037] like Figure 1 and Figure 2 As shown, an embodiment of the utility model provides an embedded planetary gear transmission hub reduction motor, which includes a fixed output shaft 1, an inner ring gear housing 2, a stator 3, a rotor 4, a first reduction mechanism and a second reduction mechanism.

[0038] The aforementioned stator 3 is relatively fixed to the fixed output shaft 1. The stator 3 is used to drive the rotor 4 to rotate. The inner gear housing 2 is rotatably arranged on the fixed output shaft 1. The inner gear housing 2 can be arranged on the fixed output shaft 1 through a bearing sleeve.

[0039] like Figure 2 and Figure 3 As shown, the aforementioned first reduction mechanism includes a motor gear 6, a first planetary gear 7 and a first inner ring gear 9. The first planetary gear 7 is meshed between the motor gear 6 and the first inner ring gear 9, the motor gear 6 is meshed with the first planetary gear 7, and the first planetary gear 7 is meshed with the first inner ring gear 9. The first inner ring gear 9 is relatively fixed to the fixed output shaft 1, and the first inner ring gear 9 is a fixed part. The rotor 4 is used to drive the motor gear 6 to rotate. The motor gear 6 is used to drive the first planetary gear 7 to revolve around the center line of the motor gear 6, so that the first planetary gear 7 drives the inner ring gear housing 2 to rotate through the second reduction mechanism.

[0040] The first inner gear ring 9 is located in the inner hole 31 of the stator, and the first planetary gear 7 and the motor gear 6 are both located on the inner side of the first inner gear ring 9 .

[0041] In the above example, the stator 3 drives the rotor 4 to rotate, the rotor 4 drives the motor gear 6 to rotate, the motor gear 6 drives the first planetary gear 7 to revolve around the center line of the motor gear 6, and when the first planetary gear 7 revolves around the center line of the motor gear 6, it drives the inner ring gear housing 2 to rotate through the second reduction mechanism, so that the inner ring gear housing 2 drives the wheel hub to rotate.

[0042] Among them, by arranging the motor gear 6, the first planetary gear 7 and the first inner ring gear 9 of the first reduction mechanism in the inner hole 31 of the stator, the space of the inner hole 31 of the stator can be effectively utilized, making the structure of the hub reduction motor of the utility model more compact and smaller in size.

[0043] It should be noted that the first inner gear ring 9 can be sleeved and fixed in the inner hole 31 of the stator. Specifically, the first inner gear ring 9 can be interference fit with the inner hole 31 of the stator. The weight of the wheel hub reduction motor of the utility model can be less than 1.2KG, so that the weight of the wheel hub reduction motor of the utility model is relatively light, so that the power is sufficient and the endurance is long.

[0044] like Figure 2 As described above, the aforementioned rotor 4 is sleeved on the outer side of the stator 3, and the rotor 4 is fixedly connected to the axle 61 of the motor gear through the first connecting member 5, so that the rotor 4 drives the motor gear 6 to rotate through the axle 61 of the motor gear.

[0045] Among them, Figure 2 and Figure 5 As shown, the first connecting member 5 is disc-shaped and has an annular flange 51 . The rotor 4 is sleeved on the annular flange 51 to be fixedly connected to the first connecting member 5 via the annular flange 51 .

[0046] In the above example, by sleeve-arranging the rotor 4 on the outside of the stator 3 , space in the inner hole 31 of the stator can be freed up, which facilitates the installation of the aforementioned first reduction mechanism in the inner hole 31 of the stator.

[0047] like Figure 2 and Figure 5 As shown, the aforementioned first connecting member 5 has a sleeve section 52 sleeved on the wheel shaft 61 of the motor gear, and the aforementioned first inner gear ring 9 has an annular connecting section 91. The sleeve section 52 extends into the annular connecting section 91, and a first bearing 16 is sleeved between the sleeve section 52 and the annular connecting section 91.

[0048] In the above example, the first bearing 16 can provide support for the first inner gear ring 9 to improve the stability of the first inner gear ring 9 .

[0049] like Figure 1 and Figure 2 As shown, the aforementioned fixed output shaft 1 is a single-sided output shaft. The wheel hub reduction motor of the utility model further includes an end cover 18, which is located on the side of the wheel hub reduction motor of the utility model away from the fixed output shaft 1, and the end cover 18 is arranged on the inner gear ring housing 2, and the end cover 18 seals the wheel shaft 61 of the motor gear inside the wheel hub reduction motor.

[0050] In the above example, since the end cover 18 encloses the axle 61 of the motor gear inside the hub reduction motor, the appearance of the entire hub reduction motor is more beautiful and the structure is more compact.

[0051] In order to realize the function of the aforementioned second speed reduction mechanism, as Figure 2 and Figure 4 As shown, the second reduction mechanism may include a sun gear 15, a second planetary gear 13 and a second inner gear ring 21. The aforementioned hub reduction motor includes a second connecting member 8, and the aforementioned first planetary gear 7 has a first axle 71. The first axle 71 is arranged on the second connecting member 8, and the first axle 71 can rotate relative to the second connecting member 8. The second connecting member 8 is sleeved on the axle 151 of the sun gear. The second planetary gear 13 is meshed between the sun gear 15 and the second inner gear ring 21, and the sun gear 15 is meshed with the second planetary gear 13, and the second planetary gear 13 is meshed with the second inner gear ring 21. The second inner gear ring 21 is fixed on the inner gear ring housing 2, and the second inner gear ring 21 can be integrally formed on the inner gear ring housing 2. Among them, the first planetary gear 7 is used to drive the second connecting member 8 to rotate through the first axle 71 when revolving around the center line of the motor gear 6, so that the second connecting member 8 drives the sun gear 15 to rotate. The sun gear 15 drives the second inner ring gear 21 to rotate through the second planetary gears 13 , so that the second inner ring gear 21 drives the inner ring gear housing 2 to rotate.

[0052] In the above example, the second connecting member 8 and the sun gear 15 both rotate around the center line of the motor gear 6. Figure 2 As shown, the second connecting member 8 is cylindrical, and the second connecting member 8 can be sleeved on the axle 61 of the motor gear. A second bearing 17 is sleeved between the second connecting member 8 and the axle 61 of the motor gear, and the second bearing 17 can provide support for the second connecting member 8. The second connecting member 8 is rotatably matched with the axle 61 of the motor gear through the second bearing 17.

[0053] When the aforementioned first planetary gear 7 revolves around the center line of the motor gear 6, the first planetary gear 7 drives the second connecting member 8 to rotate around the center line of the motor gear 6 through the first axle 71, the second connecting member 8 drives the sun gear 15 to rotate, the sun gear 15 drives the second inner ring 21 to rotate through the second planetary gear 13, and the second inner ring 21 drives the inner ring housing 2 to rotate.

[0054] like Figure 2 As shown, the aforementioned embedded planetary gear transmission hub reduction motor also includes a stator seat 10, and the stator seat 10 is relatively fixed to the aforementioned fixed output shaft 1. Specifically, a gear rack 14 is mounted on the fixed output shaft 1, and the stator seat 10 is fixedly connected to the gear rack 14, for example, by screws. The stator seat 10 is fixedly connected to the fixed output shaft 1 through the gear rack 14.

[0055] like Figure 2 and Figure 4 As shown, the aforementioned second planetary gear 13 is rotatably disposed on the stator seat 10, and the first inner gear ring 9 is disposed on the stator seat 10 to be relatively fixed with the fixed output shaft 1 through the stator seat 10. The first inner gear ring 9 can be integrally formed on the stator seat 10.

[0056] In the above example, the stator seat 10 serves as a mounting seat for the second planetary gears 13 and the first inner gear ring 9 , which is beneficial to the installation of the second planetary gears 13 and the first inner gear ring 9 .

[0057] It should be noted here that: Figure 4 As shown, the aforementioned stator seat 10 is provided with a groove 100, and the aforementioned second planetary gear 13 is located in the groove 100, which can save space and make the structure of the hub reduction motor of the utility model more compact and smaller in size.

[0058] like Figure 1 and Figure 2 As shown, the aforementioned fixed output shaft 1 has a wiring hole 101 that passes through both ends of the axial direction, and the fixed output shaft 1 has a first end 11 and a second end 12 that are opposite to each other, the first end 11 is located inside the inner gear housing 2, and the second end 12 extends out of the inner gear housing 2. The side surface of the first end 11 has a wire hole that communicates with the wiring hole 101.

[0059] In the above example, by setting the wiring hole 101 inside the fixed output shaft 1, it is convenient for the hub reduction motor of the utility model to route the wiring from the inside of the fixed output shaft 1, so that the space inside the fixed output shaft 1 can be fully utilized, making the structure of the hub reduction motor of the utility model more compact and smaller in size.

[0060] like Figure 1 and Figure 4 As shown, the outer side of the inner gear ring housing 2 may be provided with a rectangular reinforcing rib 201, which extends axially from one side of the inner gear ring housing 2 to the other side, and the rectangular reinforcing rib 201 is used to be embedded in the mounting groove of the inner cavity of the wheel hub.

[0061] In the above example, the rectangular reinforcing ribs 201 are provided to improve the connection stability between the inner gear housing 2 and the wheel hub. The rectangular reinforcing ribs 201 have a high degree of fit with the wheel hub and a strong bearing capacity.

[0062] It should be noted here that the number of the aforementioned rectangular reinforcing ribs 201 can be more than two, and they are evenly distributed in a circular shape around the center line of the inner gear ring housing 2 .

[0063] The utility model also provides a vehicle, which may include any of the above-mentioned inline planetary gear transmission hub reduction motors. Among them, because the vehicle adopts the above-mentioned inline planetary gear transmission hub reduction motor, by arranging the motor gear 6, the first planetary gear 7 and the first inner gear ring 9 of the first reduction mechanism in the inner hole 31 of the stator, the space of the inner hole 31 of the stator can be effectively utilized, so that the structure of the hub reduction motor of the utility model is more compact and the volume is smaller.

[0064] It should be noted here that the aforementioned vehicle may be an electric vehicle, a robot hub vehicle or an industrial AGV vehicle.

[0065] 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. An embedded planetary gear transmission hub reduction motor, characterized in that: include: A fixed output shaft (1), an inner gear housing (2), a stator (3), a rotor (4), a first reduction mechanism and a second reduction mechanism; The stator (3) and the fixed output shaft (1) are relatively fixed, the stator (3) is used to drive the rotor (4) to rotate, and the inner gear housing (2) is rotatably arranged on the fixed output shaft (1); The first reduction mechanism comprises a motor gear (6), a first planetary gear (7) and a first inner gear ring (9); the first planetary gear (7) is meshed between the motor gear (6) and the first inner gear ring (9); the first inner gear ring (9) is relatively fixed to the fixed output shaft (1); the rotor (4) is used to drive the motor gear (6) to rotate; the motor gear (6) is used to drive the first planetary gear (7) to revolve around the center line of the motor gear (6), so that the first planetary gear (7) drives the inner gear ring housing (2) to rotate through the second reduction mechanism; The first inner gear ring (9) is located in the inner hole (31) of the stator (3), and the first planetary gear (7) and the motor gear (6) are both located on the inner side of the first inner gear ring (9).

2. The embedded planetary gear transmission hub reduction motor according to claim 1, characterized in that: The rotor (4) is sleeved on the outer side of the stator (3), and the rotor (4) is fixedly connected to the axle (61) of the motor gear via a first connecting member (5), so that the rotor (4) drives the motor gear (6) to rotate via the axle (61) of the motor gear.

3. The embedded planetary gear transmission hub reduction motor according to claim 2, characterized in that: The first connecting member (5) has a sleeve section (52) sleeved on the axle (61) of the motor gear, and the first inner gear ring (9) has an annular connecting section (91); the sleeve section (52) extends into the annular connecting section (91), and a first bearing (16) is sleeved between the sleeve section (52) and the annular connecting section (91).

4. The embedded planetary gear transmission hub reduction motor according to claim 2 or 3, characterized in that: The fixed output shaft (1) is a single-sided output shaft; The wheel hub reduction motor also includes an end cover (18), which is located on the side of the wheel hub reduction motor away from the fixed output shaft (1), and the end cover (18) is arranged on the inner gear ring housing (2). The end cover (18) seals the wheel shaft (61) of the motor gear inside the wheel hub reduction motor.

5. The embedded planetary gear transmission hub reduction motor according to any one of claims 1 to 3, characterized in that: The second reduction mechanism comprises a sun gear (15), a second planetary gear (13) and a second inner gear ring (21); the hub reduction motor comprises a second connecting member (8); the first planetary gear (7) has a first axle (71); the first axle (71) is arranged on the second connecting member (8); the second connecting member (8) is sleeved on the axle (151) of the sun gear; the second planetary gear (13) is meshed between the sun gear (15) and the second inner gear ring (21); the second inner gear ring (21) is fixed on the inner gear ring housing (2); The first planetary gear (7) is used to drive the second connecting member (8) to rotate through the first wheel shaft (71) when revolving around the center line of the motor gear (6), so that the second connecting member (8) drives the sun gear (15) to rotate; the sun gear (15) drives the second inner ring gear (21) to rotate through the second planetary gear (13), so that the second inner ring gear (21) drives the inner ring gear housing (2) to rotate.

6. The embedded planetary gear transmission hub reduction motor according to claim 5, characterized in that: It also includes a stator seat (10), wherein the stator seat (10) and the fixed output shaft (1) are kept relatively fixed; The second planetary gear (13) is rotatably arranged on the stator seat (10), and the first inner gear ring (9) is arranged on the stator seat (10) so as to be relatively fixed with the fixed output shaft (1) through the stator seat (10).

7. The embedded planetary gear transmission hub reduction motor according to any one of claims 1 to 3 and 6, characterized in that: The fixed output shaft (1) has a wiring hole (101) penetrating through two axial ends, and the fixed output shaft (1) has a first end (11) and a second end (12) opposite to each other, the first end (11) is located inside the inner gear housing (2), and the second end (12) protrudes from the inner gear housing (2); Wherein, a side surface of the first end (11) has a wire hole connected to the wire routing hole (101).

8. The embedded planetary gear transmission hub reduction motor according to any one of claims 1 to 3 and 6, characterized in that: A rectangular reinforcing rib (201) is provided on the outer side of the inner gear ring housing (2), the rectangular reinforcing rib (201) extending from one axial side of the inner gear ring housing (2) to the other side, and the rectangular reinforcing rib (201) is used to be embedded in a mounting groove in the inner cavity of the wheel hub.

9. A vehicle, characterized in that: An embedded planetary gear transmission hub reduction motor comprising any one of claims 1 to 8.

10. The vehicle according to claim 9, characterized in that The vehicle is an electric vehicle, a robot hub vehicle or an industrial AGV vehicle.

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