Helical tooth type hub gear motor and vehicle applying same

Abstract

The utility model relates to a helical tooth type hub gear motor and a vehicle using the same, and the helical tooth type hub gear motor comprises a fixed seat, a connecting shell, a motor assembly, a sun gear and a planetary gear. A fixed shaft is arranged on the fixed seat, and the connecting shell is arranged on the fixed seat and can rotate around the fixed shaft; the sun gear and the planetary gear are both arranged on the fixing base in a self-rotating mode, the connecting shell is provided with an inner hole, and transmission teeth are distributed in the inner hole in the circumferential direction. The planetary gear is meshed between the sun gear and the transmission gear; the motor assembly is arranged on the fixing base and used for driving the sun gear to rotate automatically, so that the sun gear drives the connecting shell to rotate through the planetary gear. The first transmission teeth are helical teeth, and the sun gear and the planetary gears are helical gears. According to the technical scheme of the utility model, the size of the planetary speed reducing mechanism of the hub speed reducing motor can be reduced, so that the overall structure is more compact.

Description

Technical Field

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

[0002] In the prior art, wheel hub reduction motors mostly use single-stage planetary reducers, two-stage planetary reducers or cycloid pinwheel planetary reducers, etc. Among them, the single-stage planetary reducer has a simple structure, but a small reduction ratio. At the same vehicle speed and wheel radius, the motor speed is low, and the motor power density cannot be effectively improved. It is generally used on vehicle wheels.

[0003] Among them, the planetary reduction structure of the existing hub reduction motor generally adopts a spur gear transmission structure. In order to avoid root cutting, the spur gear requires a large number of teeth, resulting in a large volume and a less compact structure. Therefore, a solution is needed to address this situation. Utility Model Content

[0004] In view of this, the utility model provides a helical gear hub reduction motor and a vehicle using the same, and the main technical problem to be solved is: how to reduce the volume of the planetary reduction mechanism of the hub reduction motor to make the overall structure more compact.

[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 helical gear hub reduction motor, which includes a fixing seat, a connecting shell, a motor assembly, a sun gear and a planetary gear;

[0007] The fixing seat is provided with a fixing shaft, the connecting shell is arranged on the fixing seat and can rotate around the fixing shaft; the fixing seat is connected to the external fixing frame through the fixing shaft;

[0008] The sun gear and the planetary gear are both rotatably arranged on the fixed seat, the connecting shell has an inner hole, and the inner hole is circumferentially arranged with transmission teeth; the planetary gear is meshed between the sun gear and the transmission teeth; the motor assembly is arranged on the fixed seat, and the motor assembly is used to drive the sun gear to rotate, so that the sun gear drives the connecting shell to rotate through the planetary gears;

[0009] Wherein, the first transmission teeth are helical teeth, and the sun gear and the planetary gears are both helical gears.

[0010] In some embodiments, the motor assembly includes a stator, a rotor and a rotor shaft, the stator is sleeved on the outside of the fixing seat, the rotor is sleeved on the outside of the stator, the fixing seat is provided with a through hole, the rotor shaft passes through the through hole and is fixedly connected to the rotor through a connecting member; the rotor shaft is also connected to the sun gear;

[0011] Wherein, 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 is used to drive the sun gear to rotate.

[0012] In some embodiments, a first bearing is provided 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;

[0013] And / or, the axes of the rotor shaft and the fixed shaft coincide with each other, the connecting shell is further provided with a mounting groove, the rotor shaft extends into the mounting groove, and a second bearing is provided between the rotor shaft and the groove wall of the mounting groove, and the rotor shaft provides support to the connecting shell through the second bearing;

[0014] And / or, a weight-reducing hole is provided on the fixing seat, and the weight-reducing hole is located between the through hole and the stator.

[0015] In some embodiments, the fixing seat is provided with a fixing cover, and the fixing cover can be removed relative to the fixing seat; the fixing shaft is arranged on the fixing cover to be connected to the fixing seat through the fixing cover;

[0016] The planetary gear is installed between the fixing seat and the fixing cover. The planetary gear has a wheel axle, one end of the wheel axle is installed on the fixing seat, and the other end of the wheel axle is installed on the fixing cover.

[0017] In some embodiments, one end of the fixing seat close to the fixing cover has a first recessed groove, and the planetary gear is located in the first recessed groove.

[0018] In some embodiments, the fixing cover is provided with a through mounting hole, one end of the mounting hole close to the fixing seat has a second sinking groove, one end of the fixing shaft has a hanging platform, the fixing shaft passes through the mounting hole, and is hung on the bottom surface of the second sinking groove through the hanging platform hook;

[0019] Wherein, the fixed shaft and the mounting hole are interference fit.

[0020] In some embodiments, the fixed shaft passes through the connecting shell, and a third bearing is sleeved between the fixed shaft and the connecting shell, and the fixed shaft provides support to the connecting shell through the third bearing.

[0021] In some embodiments, the connecting shell is cylindrical, and the outer wall of the connecting shell has two or more reinforcing ribs arranged in sequence along the circumferential direction, and each reinforcing rib extends along the center line direction of the connecting shell; wherein each of the reinforcing ribs is used to be plugged into the plug-in hole of the external hub in a one-to-one correspondence.

[0022] In some embodiments, the connecting shell is a two-half structure, and the two halves of the connecting shell are detachably connected.

[0023] The utility model also provides a vehicle, which may include any one of the above-mentioned helical gear hub reduction motors.

[0024] By means of the above technical solution, the helical gear hub reduction motor of the utility model and the vehicle using the same have at least the following beneficial effects:

[0025] 1. In the technical solution provided by the present invention, since the first transmission teeth are helical teeth, and the sun gear and the planetary gears are also helical gears, compared with the spur gear transmission solution in the prior art, the minimum number of teeth of the helical gear without root cutting is less than that of the spur gear. Therefore, the use of helical gear transmission can obtain a more compact mechanism, so that the planetary reduction mechanism formed by the sun gear, the planetary gear and the first transmission teeth of the present invention has a smaller volume and a more compact overall structure.

[0026] 2. The hub reduction motor of the utility model achieves the design purpose by means of the motor assembly and the planetary helical gear structure arranged inside it, so that the motor power is transmitted and output through the helical gear reduction, thereby driving the entire hub to rotate. It has the advantages of small size, light weight, high efficiency, strong load-bearing capacity, long service life, good meshing performance, and large overlap.

[0027] 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

[0028] 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.

[0029] Figure 1 It is a structural schematic diagram of a helical gear hub reduction motor provided by one embodiment of the utility model;

[0030] Figure 2It is a cross-sectional view of a helical gear hub reduction motor provided by one embodiment of the utility model;

[0031] Figure 3 It is a structural schematic diagram reflecting the meshing of the sun gear and the planetary gear;

[0032] Figure 4 It is a schematic diagram of the structure of the fixed axis;

[0033] Figure 5 It is a structural schematic diagram of the fixed cover.

[0034] Figure numerals: 1. fixed shaft; 2. connecting shell; 3. rotor shaft; 4. sun gear; 5. planetary gear; 6. fixed seat; 7. fixed cover; 8. first bearing; 9. second bearing; 10. third bearing; 11. hanging platform; 12. stator; 13. rotor; 14. connecting piece; 20. transmission tooth; 21. reinforcing rib; 51. axle; 61. through hole; 62. first sinker; 201. inner hole; 202. mounting groove; 601. weight-reducing hole; 701. second sinker; 702. mounting hole. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] 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.

[0038] like Figures 1 to 3 As shown, a helical hub reduction motor proposed in one embodiment of the utility model includes a fixing seat 6, a connecting shell 2, a motor assembly, a sun gear 4 and a planetary gear 5. A fixing shaft 1 is provided on the fixing seat 6, and the fixing shaft 1 is fixed on the fixing seat 6. The fixing seat 6 is connected to an external fixed frame through the fixing shaft 1. Since the external fixed frame is a fixing part, after the fixing shaft 1 is fixed on the external frame, the fixing shaft 1 and the fixing seat 6 are both fixing parts.

[0039] The aforementioned connecting shell 2 is arranged on the fixed seat 6 and can rotate around the fixed axis 1. The aforementioned sun gear 4 and planetary gear 5 are both rotatably arranged on the fixed seat 6. The aforementioned connecting shell 2 has an inner hole 201, and the inner hole 201 is arranged with transmission teeth 20 along the circumferential direction. The planetary gear 5 is meshed between the sun gear 4 and the transmission teeth 20. The motor assembly is arranged on the fixed seat 6, and the motor assembly is used to drive the sun gear 4 to rotate, so that the sun gear 4 drives the connecting shell 2 to rotate through the planetary gear 5. The connecting shell 2 is used to be connected to the external hub to drive the external hub to rotate.

[0040] The first transmission teeth 20 are helical teeth, and the sun gear 4 and the planetary gears 5 are helical gears.

[0041] In the above example, since the first transmission teeth 20 are helical teeth, and the sun gear 4 and the planetary gears 5 are also helical gears, relative to the spur gear transmission scheme in the prior art, the minimum number of teeth of the helical gear without root cutting is less than that of the spur gear. Therefore, the use of helical gear transmission can obtain a more compact mechanism, so that the planetary reduction mechanism formed by the sun gear 4, the planetary gears 5 and the first transmission teeth 20 of the utility model has a smaller volume and a more compact overall structure.

[0042] The planetary reduction mechanism formed by the sun gear 4, the planetary gears 5 and the first transmission teeth 20 has a simple transmission structure, a high transmission efficiency (generally about 90%), a long service life and low noise.

[0043] It should be noted here that: Figure 3 As shown, the number of the planetary gears 5 can be more than two, preferably, the number of the planetary gears 5 is 3. Each planetary gear 5 is meshed between the sun gear 4 and the transmission tooth 20. More planetary gears 5 can improve the stability of the transmission, so that the connecting housing 2 can rotate more stably.

[0044] In some embodiments, Figure 2As shown, the aforementioned motor assembly may include a stator 12, a rotor 13 and a rotor shaft 3. The stator 12 is sleeved on the outer side of the fixing seat 6. The rotor 13 is sleeved on the outer side of the stator 12, and there is a gap between the rotor 13 and the stator 12. The aforementioned fixing seat 6 is provided with a through hole 61, and the rotor shaft 3 passes through the through hole 61. The rotor shaft 3 is fixedly connected to the rotor 13 through a connecting member 14. The rotor shaft 3 is also connected to the sun gear 4. Specifically, the sun gear 4 can be integrally formed on the rotor shaft 3, so that the connection stability between the sun gear 4 and the rotor shaft 3 can be improved.

[0045] The stator 12 is used to drive the rotor 13 to rotate, so that the rotor 13 drives the rotor shaft 3 to rotate through the connecting member 14. The rotor shaft 3 is used to drive the sun gear 4 to rotate.

[0046] The connecting member 14 may be in the shape of a disk, and the connecting member 14 is sleeved on the rotor shaft 3. The connecting member 14 is fixedly connected to the rotor 13 through its outer edge.

[0047] In the above example, the rotor 13 of the motor assembly is an external structure, and the fixing seat 6 extends into the inner hole of the stator 12, which can effectively utilize the space in the inner hole of the stator and save volume.

[0048] In some embodiments, Figure 2 As shown, a first bearing 8 may be provided between the aforementioned rotor shaft 3 and the inner wall of the through hole 61, and the inner wall of the through hole 61 provides support to the rotor shaft 3 through the first bearing 8 to ensure the stability of the rotation of the rotor shaft 3. The number of the first bearings 8 may be more than two, and they are arranged in sequence along the axial direction of the rotor shaft 3. A larger number of bearings can further improve the stability of the rotation of the rotor shaft 3.

[0049] In some embodiments, Figure 2 As shown, the axes of the rotor shaft 3 and the fixed shaft 1 coincide. The connection shell 2 is also provided with a mounting groove 202, into which the rotor shaft 3 extends, and a second bearing 9 is provided between the rotor shaft 3 and the groove wall of the mounting groove 202. The rotor shaft 3 provides support to the connection shell 2 through the second bearing 9. Among them, since the rotor shaft 3 is supported by the fixing seat 6, the fixing seat 6 can indirectly provide support to the connection shell 2 through the rotor shaft 3, so that the connection shell 2 can rotate stably.

[0050] In some embodiments, Figure 2 As shown, the aforementioned fixing seat 6 may be provided with a weight-reducing hole 601, and the weight-reducing hole 601 is located between the through hole 61 and the stator 12. Among them, by providing the weight-reducing hole 601, the weight of the fixing seat 6 can be reduced, so that the overall weight of the helical gear hub reduction motor of the utility model is reduced.

[0051] like Figure 2As shown, the number of the weight-reducing holes 601 may be more than two, and they are arranged around the through hole 61 .

[0052] In some embodiments, Figure 2 As shown, the aforementioned fixing seat 6 may be provided with a fixing cover 7, and the fixing cover 7 may be detachable relative to the fixing seat 6, for example, the two may be fixed by screws. The aforementioned fixing shaft 1 is arranged on the fixing cover 7 to be connected to the fixing seat 6 through the fixing cover 7. The aforementioned planetary gear 5 is installed between the fixing seat 6 and the fixing cover 7, and the planetary gear 5 has an axle 51, one end of the axle 51 is installed on the fixing seat 6, and the other end is installed on the fixing cover 7.

[0053] In the above example, the planetary gear 5 can be first mounted on the fixing seat 6 and then covered with the fixing cover 7 . The fixing cover 7 can provide housing protection for the planetary gear 5 .

[0054] It should be noted that the above-mentioned fixing seat 6 is sometimes referred to as a stator seat because the stator 12 is installed thereon. The above-mentioned fixing cover 7 is sometimes referred to as an output fixing gear rack.

[0055] In some embodiments, Figure 3 As shown, the end of the fixing seat 6 close to the fixing cover 7 has a first recessed groove 62, and the planetary gear 5 is located in the first recessed groove 62, which can effectively save space and make the assembly structure of the planetary gear 5 and the fixing seat 6 more compact.

[0056] In some embodiments, Figure 4 and Figure 5 As shown, the aforementioned fixing cover 7 may be provided with a through mounting hole 702, and one end of the mounting hole 702 close to the fixing seat 6 has a second sinking groove 701. One end of the fixing shaft 1 has a hanging platform 11, and the fixing shaft 1 passes through the mounting hole 702 and is hooked on the bottom surface of the second sinking groove 701 through the hanging platform 11. The fixing shaft 1 and the mounting hole 702 are interference fit.

[0057] In the above example, the second sink groove 701 cooperates with the hanging platform 11 of the fixed shaft 1 to limit the position of the fixed shaft 1 assembled on the fixed cover 7 to improve the position installation accuracy of the fixed shaft 1.

[0058] In some embodiments, such as Figure 2 As shown, the aforementioned fixed shaft 1 passes through the connecting shell 2 , and a third bearing 10 is sleeved between the fixed shaft 1 and the connecting shell 2 . The fixed shaft 1 provides support to the connecting shell 2 through the third bearing 10 to improve the rotation stability of the connecting shell 2 .

[0059] In some embodiments, Figure 1As shown, the aforementioned connection shell 2 may be cylindrical, and the outer wall of the connection shell 2 may have two or more reinforcing ribs 21 arranged in sequence along the circumferential direction, and each reinforcing rib 21 may extend along the center line direction of the connection shell 2. Among them, each reinforcing rib 21 is used to be plugged into the plug hole of the external hub in a one-to-one correspondence. Each reinforcing rib 21 may be integrally formed on the connection shell 2.

[0060] In the above example, the reinforcing ribs 21 are provided to make the connection between the connecting shell 2 and the inner cavity of the wheel hub more stable, which is beneficial to improving the connection stability between the connecting shell 2 and the external wheel hub.

[0061] In some embodiments, the aforementioned reinforcing rib 21 has a rectangular cross-sectional profile in a cross section perpendicular to the center line of the connecting shell 2 .

[0062] In some embodiments, the aforementioned connecting shell 2 may be a two-half structure, and the two halves of the connecting shell 2 may be detachably connected, for example, the two halves of the connecting shell 2 may be detachably connected by screws. The lower end of the connecting shell 2 may sometimes be referred to as a back cover, and the upper end of the connecting shell 2 may sometimes be referred to as an inner gear ring housing.

[0063] In the above example, the aforementioned fixing seat 6, motor assembly, sun gear 4 and planetary gear 5 are all installed inside the connecting shell 2, wherein the connecting shell 2 is designed as a detachable two-half structure, which has the advantage of facilitating the assembly of the internal components.

[0064] Among them, the hub reduction motor of the utility model achieves the design purpose by means of the motor assembly and the planetary helical gear structure arranged inside it, so that the motor power is transmitted and output through the helical gear reduction, thereby driving the entire hub to rotate. It has the advantages of small size, light weight, high efficiency, strong load-bearing capacity, long service life, good meshing performance, and large overlap.

[0065] The embodiment of the utility model further provides a vehicle, which may include any of the above-mentioned helical gear hub reduction motors. Among them, because the vehicle adopts the above-mentioned helical gear hub reduction motor, since the first transmission teeth 20 are helical teeth, and the sun gear 4 and the planetary gears 5 are also helical gears, compared with the spur gear transmission scheme in the prior art, the minimum number of teeth of the helical gear without root cutting is less than that of the spur gear. Therefore, the use of helical gear transmission can obtain a more compact mechanism, so that the volume of the planetary reduction mechanism formed by the sun gear 4, the planetary gear 5 and the first transmission teeth 20 of the utility model is smaller, and the overall structure is more compact.

[0066] It should be noted here that the above-mentioned vehicle can be a small electric vehicle, a robot vehicle with wheels, or an industrial AGV vehicle, etc.

[0067] 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 helical gear hub reduction motor, characterized in that: It comprises a fixing seat (6), a connecting shell (2), a motor assembly, a sun gear (4) and a planetary gear (5); The fixing seat (6) is provided with a fixing shaft (1); the connecting shell (2) is arranged on the fixing seat (6) and can rotate around the fixing shaft (1); the fixing seat (6) is connected to an external fixing frame via the fixing shaft (1); The sun gear (4) and the planetary gear (5) are both rotatably arranged on the fixing seat (6); the connecting shell (2) has an inner hole (201), and the inner hole (201) has transmission teeth (20) arranged along the circumferential direction; the planetary gear (5) is meshed between the sun gear (4) and the transmission teeth (20); the motor assembly is arranged on the fixing seat (6), and the motor assembly is used to drive the sun gear (4) to rotate, so that the sun gear (4) drives the connecting shell (2) to rotate through the planetary gear (5); Wherein, the transmission teeth (20) are helical teeth, and the sun gear (4) and the planetary gears (5) are both helical gears.

2. The helical gear hub reduction motor according to claim 1, characterized in that: The motor assembly comprises a stator (12), a rotor (13) and a rotor shaft (3); the stator (12) is sleeved on the outside of the fixing seat (6); the rotor (13) is sleeved on the outside of the stator (12); the fixing seat (6) is provided with a through hole (61); the rotor shaft (3) passes through the through hole (61) and is fixedly connected to the rotor (13) via a connecting piece (14); the rotor shaft (3) is also connected to the sun gear (4); The stator (12) is used to drive the rotor (13) to rotate, so that the rotor (13) drives the rotor shaft (3) to rotate through the connecting member (14); and the rotor shaft (3) is used to drive the sun gear (4) to rotate.

3. The helical gear hub reduction motor according to claim 2, characterized in that: A first bearing (8) is provided between the rotor shaft (3) and the inner wall of the through hole (61), and the inner wall of the through hole (61) provides support for the rotor shaft (3) through the first bearing (8); And / or, the axes of the rotor shaft (3) and the fixed shaft (1) coincide with each other, the connecting shell (2) is further provided with a mounting groove (202), the rotor shaft (3) extends into the mounting groove (202), and a second bearing (9) is provided between the rotor shaft (3) and the groove wall of the mounting groove (202), and the rotor shaft (3) provides support for the connecting shell (2) via the second bearing (9); And / or, a weight-reducing hole (601) is provided on the fixing seat (6), and the weight-reducing hole (601) is located between the through hole (61) and the stator (12).

4. The helical gear hub reduction motor according to any one of claims 1 to 3, characterized in that: The fixing seat (6) is provided with a fixing cover (7), and the fixing cover (7) can be removed relative to the fixing seat (6); the fixing shaft (1) is arranged on the fixing cover (7) to be connected to the fixing seat (6) through the fixing cover (7); The planetary gear (5) is mounted between the fixing seat (6) and the fixing cover (7), and the planetary gear (5) has a wheel axle (51), one end of the wheel axle (51) is mounted on the fixing seat (6), and the other end is mounted on the fixing cover (7).

5. The helical gear hub reduction motor according to claim 4, characterized in that: One end of the fixing seat (6) close to the fixing cover (7) has a first recessed groove (62), and the planetary gear (5) is located in the first recessed groove (62).

6. The helical gear hub reduction motor according to claim 4, characterized in that: The fixing cover (7) is provided with a through mounting hole (702), one end of the mounting hole (702) close to the fixing seat (6) is provided with a second sink groove (701), one end of the fixing shaft (1) is provided with a hanging platform (11), the fixing shaft (1) passes through the mounting hole (702) and is hooked on the bottom surface of the second sink groove (701) through the hanging platform (11); Wherein, the fixed shaft (1) and the mounting hole (702) are interference fit.

7. The helical gear hub reduction motor according to any one of claims 1 to 3, characterized in that: The fixed shaft (1) passes through the connecting shell (2); a third bearing (10) is sleeved between the fixed shaft (1) and the connecting shell (2); and the fixed shaft (1) provides support for the connecting shell (2) via the third bearing (10).

8. The helical gear hub reduction motor according to any one of claims 1 to 3, characterized in that: The connecting shell (2) is cylindrical, and the outer wall of the connecting shell (2) has two or more reinforcing ribs (21) arranged in sequence and spaced apart along the circumferential direction, and each reinforcing rib (21) extends along the center line direction of the connecting shell (2); wherein each reinforcing rib (21) is used to be plugged into the plug-in hole of the external wheel hub in a one-to-one correspondence.

9. The helical gear hub reduction motor according to any one of claims 1 to 3, characterized in that: The connecting shell (2) is a two-half structure, and the two halves of the connecting shell (2) are detachably connected.

10. A vehicle, characterized in that: A helical hub reduction motor comprising any one of claims 1 to 9.

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