Small-speed-ratio inner gear ring transmission coupling motor

Abstract

The utility model relates to a small-speed-ratio inner gear ring transmission coupling motor, the axial outer side of a motor shaft is provided with an inner gear ring, the inner gear ring comprises a gear ring part and an output shaft formed at the axial outer end of the gear ring part, the inner wall of the gear ring part is provided with an inner helical tooth wall, and the inner side of the output shaft forms a connecting cavity connected with the outside; a bevel gear is formed at the end of the motor shaft, the inner diameter of the gear ring part is larger than the outer diameter of the bevel gear, and the bevel gear extends into the gear ring part to be meshed with the inner bevel gear wall part. The outer side of the gear ring part is sleeved with a first deep groove ball bearing, a rear end cover is fixedly arranged at the end of the machine shell, an adapter end cover is fixedly arranged at the outer end of the rear end cover, an annular installation groove matched with the first deep groove ball bearing is formed between the rear end cover and the adapter end cover, and a sealing ring is arranged between the output shaft and the adapter end cover. According to the scheme, helical gear input and inner gear ring output enable the coupling motor to have the effects of speed reduction and torque increase, a speed reducer is not needed, the motor size is greatly reduced, the motor stack thickness can be halved, and the cost is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a small-ratio internal gear ring drive coupling motor. Background Technology

[0002] The tooth surface of helical gears is inclined, resulting in a large contact area and a larger contact angle. This makes helical gears more stable and efficient during transmission, and has the effect of reducing the speed of the drive equipment and increasing the output torque.

[0003] CN118832984A discloses an electric drive axle for a wheel loader, comprising an axle housing and electric wheels at both ends of the axle housing. The axle housing includes a shell and first flanges at both ends of the shell. Each electric wheel includes a reducer housed within a wheel rim, a travel motor housed within the axle housing, and a brake housed within the axle housing. The brake is mounted on a brake mounting seat inside the travel motor. The brake includes a cylinder, a piston housed within the cylinder, fixed friction pads, movable friction pads, and a brake disc. The brake disc is positioned between the fixed and movable friction pads. The piston drives the movable friction pads towards the fixed friction pads, which are fixed to the cylinder. One end of the travel motor output shaft extends into the brake, and the extended shaft has a transition spline on which the brake disc is fitted. This design solves the problems of low transmission efficiency in traditional mechanical axles, large space requirements in existing caliper-type brake electric wheel structures, and high manufacturing costs in existing wet-type brake electric wheel structures.

[0004] The electric drive structure in the above scheme has a large size of motor and reducer combination, resulting in high manufacturing cost and high space occupancy. Summary of the Invention

[0005] To address the aforementioned problems, the purpose of this invention is to provide a small-ratio internal gear ring drive coupling motor. A helical gear is installed on the motor shaft, and an internal gear ring that meshes with the helical gear is installed inside the motor. The helical gear is the input, and the internal gear ring is the output, which can achieve the effect of speed reduction and torque increase. In this way, under the same output power, the output torque of the motor can be reduced. By increasing torque through the cooperation of the helical gear and the internal gear ring, a speed reducer is not required, which can make the motor smaller and more compact, and reduce the motor manufacturing cost.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A low-ratio internal gear ring drive coupling motor includes a housing and a rotor and a stator disposed within the housing. The stator includes a stator core, and the rotor includes a rotor core and a motor shaft passing through the rotor core. Its features are as follows:

[0008] An internal gear ring is provided on the outer axial side of the motor shaft. The internal gear ring includes a gear ring portion and an output shaft formed on the outer axial end of the gear ring portion. The inner wall of the gear ring portion is provided with an inner helical tooth wall, and the inner side of the output shaft forms a connecting cavity for connection with the outside. A helical gear is formed at the end of the motor shaft. The inner diameter of the gear ring portion is larger than the outer diameter of the helical gear. The helical gear extends into the gear ring portion and meshes with the inner helical tooth wall portion. A first deep groove ball bearing is sleeved on the outer side of the gear ring portion. A rear end cover is fixedly provided at the end of the housing. A transition end cover is fixedly provided at the outer end of the rear end cover. An annular mounting groove for cooperation with the first deep groove ball bearing is formed between the rear end cover and the transition end cover. A sealing ring is provided between the output shaft and the transition end cover.

[0009] Preferably, the overlap ratio between the helical gear and the internal helical tooth wall is greater than 3.

[0010] Preferably, the adapter end cover is provided with a through hole for the output shaft to extend out, the lower end of the sealing ring is open and a deformation groove is formed on the inner side, the upper edge of the through hole forms a guide inclined wall, and the sealing ring is installed into the through hole along the guide inclined wall.

[0011] Preferably, the upper part of the outer wall of the sealing ring is provided with a sealing ring wall that mates with the output shaft.

[0012] Preferably, the lower part of the outer wall of the sealing ring is provided with a sealing lip that mates with the output shaft.

[0013] Preferably, an elastic ring is fitted on the inner wall of the sealing ring near the output shaft.

[0014] Preferably, a support ring protrudes inward on the inner wall of the rear end cover, and a support groove is formed inside the support ring. The motor shaft is connected to the support groove through a second deep groove ball bearing. The bottom of the support groove is provided with a mating hole for the helical gear to extend out. A convex wall is provided on the side wall of the motor shaft, and the axial inner end of the second deep groove ball bearing abuts against the convex wall.

[0015] Preferably, an assembly groove is formed between the rotor and the stator, the second deep groove ball bearing is located in the assembly groove, and the support ring portion extends into the assembly groove.

[0016] Preferably, the inner wall of the rear end cover is provided with an overlapping ring on the outside of the support ring, and the housing is provided with an overlapping groove that mates with the overlapping ring.

[0017] The present invention adopts the above technical solution and has the following beneficial effects:

[0018] 1. By setting a helical gear on the motor shaft, with the helical gear as input and the internal gear ring as output, the coupled motor has the effect of speed reduction and torque increase, eliminating the need for a speed reducer, greatly reducing the motor size, and halving the motor thickness, effectively reducing costs.

[0019] 2. The combination of helical gears and internal gear rings results in low cost and simple assembly.

[0020] 3. The adapter end cap and sealing ring are used for sealing, and the assembly is reasonable.

[0021] 4. The input uses helical gears and the output uses an internal gear ring, which can achieve a small speed ratio and meet the requirements of high speed.

[0022] 5. The overlap ratio between the helical gear and the internal helical tooth wall is greater than 3, resulting in high transmission smoothness and load-bearing capacity. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of a small-ratio internal gear ring drive coupled motor.

[0024] Figure 2 This is a schematic cross-sectional view of a small-ratio internal gear ring drive coupled motor.

[0025] Figure 3 for Figure 2 Enlarged diagram of point A in the middle.

[0026] Figure 4 This is a schematic diagram showing the installation of the deep groove ball bearing on the motor shaft and the internal gear ring.

[0027] Figure 5 This is a schematic diagram showing the fit between the motor shaft and the internal gear ring.

[0028] Figure 6 This is a schematic diagram showing the arrangement of helical gears on the motor shaft.

[0029] Figure 7 This is a schematic diagram of the three-dimensional structure of the internal gear ring.

[0030] Figure 8 This is a three-dimensional structural diagram of the rear cover.

[0031] Figure 9 This is a three-dimensional structural diagram of the rear cover from another perspective.

[0032] Figure 10 This is a schematic diagram showing the fit between the adapter end cap and the sealing ring.

[0033] Figure 11 This is a schematic diagram of the three-dimensional structure of the sealing ring.

[0034] Figure 12 This is a schematic diagram of the three-dimensional structure of the casing.

[0035] Figure 13 This is a schematic diagram of the motor's output. Detailed Implementation

[0036] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0037] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] like Figures 1-13The diagram shows a small-ratio internal gear ring drive coupled motor, comprising a housing 1 and a rotor and stator disposed within the housing 1. The stator includes a stator core, and the rotor includes a rotor core and a motor shaft 2 passing through the rotor core. An internal gear ring 3 is provided on the axially outer side of the motor shaft 2. The internal gear ring 3 includes a gear ring portion 4 and an output shaft 5 formed on the axially outer end of the gear ring portion 4. The inner wall of the gear ring portion 4 is provided with an internal helical tooth wall 6, and the inner side of the output shaft 5 forms a connecting cavity 7 for connection with the outside. The end of the motor shaft 2... The machine housing 1 is fitted with a helical gear 8. The inner diameter of the gear ring portion 4 is larger than the outer diameter of the helical gear 8. The helical gear 8 extends into the gear ring portion 4 and partially meshes with the inner helical tooth wall 6. A first deep groove ball bearing 9 is fitted on the outer side of the gear ring portion 4. A rear end cover 10 is fixedly provided at the end of the housing 1. An adapter end cover 11 is fixedly provided at the outer end of the rear end cover 10. An annular mounting groove 12 is formed between the rear end cover 10 and the adapter end cover 11 to cooperate with the first deep groove ball bearing 9. A sealing ring 13 is provided between the output shaft 5 and the adapter end cover 11.

[0042] In the above technical solution, a helical gear is installed on the motor shaft. The helical gear rotates together with the motor shaft, driving the internal gear ring to output power. This gives the coupled motor a speed reduction and torque increase effect, eliminating the need for a speed reducer, significantly reducing the motor size, and halving the motor thickness, effectively lowering costs. Furthermore, after installing the internal gear ring, a transition end cover is used for secondary sealing to facilitate the sealing of the rear end cover, and a sealing ring is used in conjunction, resulting in a good sealing effect. The helical gear and internal gear ring mating structure is low-cost and simple to assemble. The first deep groove ball bearing supports the internal gear ring and reduces friction.

[0043] Furthermore, the gear overlap ratio between the helical gear 8 and the internal helical tooth wall 6 is greater than 3. In this technical solution, the gear overlap ratio between the helical gear and the internal helical tooth wall is greater than 3, resulting in high transmission smoothness and load-bearing capacity.

[0044] Furthermore, the adapter end cover 11 is provided with a through hole 14 for the output shaft 5 to extend out. The lower end of the sealing ring 13 is open and a deformation groove 15 is formed on its inner side. The upper edge of the through hole 14 forms a guide inclined wall 16. The sealing ring 13 is installed into the through hole 14 along the guide inclined wall 16. In this technical solution, the deformation groove makes the sealing ring easy to deform, thus facilitating assembly. The guide inclined wall cooperates with the sealing ring to achieve rapid assembly.

[0045] Furthermore, the upper part of the outer wall of the sealing ring 13 is provided with a sealing ring wall 17 that mates with the output shaft 5. In this technical solution, the sealing ring wall serves a sealing function.

[0046] Furthermore, the lower part of the outer wall of the sealing ring 13 is provided with a sealing lip 18 that mates with the output shaft 5. In this technical solution, the sealing lip serves to further seal the surface.

[0047] Furthermore, an elastic ring 19 is fitted onto the inner wall of the sealing ring 13 near the output shaft 5. In this technical solution, the elastic ring allows the inner side of the sealing ring (the sealing ring wall and the sealing lip) to fit tightly against the side wall of the output shaft, ensuring a sealing effect.

[0048] Furthermore, a support ring 20 protrudes inward from the inner wall of the rear end cover 10, and a support groove is formed within the support ring 20. The motor shaft 2 is connected to the support groove via a second deep groove ball bearing 21. The bottom of the support groove is provided with a mating hole 22 for the helical gear 8 to extend out. A raised wall 23 is provided on the side wall of the motor shaft 2, and the axial inner end of the second deep groove ball bearing 21 abuts against the raised wall 23. In this technical solution, the second deep groove ball bearing supports the motor shaft and reduces friction.

[0049] Furthermore, an assembly groove 24 is formed between the rotor and the stator, the second deep groove ball bearing 21 is located within the assembly groove 24, and the support ring 20 partially extends into the assembly groove 24. In this technical solution, the assembly groove allows the assembly structure, such as the bearing, to be closer to the axial inward side, thereby reducing the axial dimension of the motor to a certain extent.

[0050] Furthermore, an overlapping ring 25 is provided on the inner wall of the rear end cover 10 on the outer side of the support ring 20, and an overlapping groove 26 is provided on the housing 1 to cooperate with the overlapping ring 25. In this technical solution, the cooperation between the overlapping ring and the overlapping groove allows the rear end cover and the housing to be quickly fitted together, improving the motor assembly efficiency.

[0051] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0052] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A small-ratio internal gear ring drive coupling motor, comprising a housing (1) and a rotor and a stator disposed within the housing (1), the stator comprising a stator core, and the rotor comprising a rotor core and a motor shaft (2) passing through the rotor core, characterized in that: An internal gear ring (3) is provided on the outer side of the motor shaft (2). The internal gear ring (3) includes a gear ring portion (4) and an output shaft (5) formed on the outer end of the gear ring portion (4). An internal helical tooth wall (6) is provided on the inner wall of the gear ring portion (4). A connecting cavity (7) for connecting to the outside is formed on the inner side of the output shaft (5). A helical gear (8) is formed at the end of the motor shaft (2). The inner diameter of the gear ring portion (4) is larger than the outer diameter of the helical gear (8). The helical gear (8) extends into the gear ring. The inner part (4) meshes with the inner helical tooth wall (6); a first deep groove ball bearing (9) is sleeved on the outer side of the gear ring part (4); a rear end cover (10) is fixedly provided at the end of the housing (1); an adapter end cover (11) is fixedly provided at the outer end of the rear end cover (10); an annular mounting groove (12) that mates with the first deep groove ball bearing (9) is formed between the rear end cover (10) and the adapter end cover (11); a sealing ring (13) is provided between the output shaft (5) and the adapter end cover (11).

2. The low-ratio internal gear ring drive coupling motor according to claim 1, characterized in that: The overlap ratio between the helical gear (8) and the internal helical tooth wall (6) is greater than 3.

3. The low-ratio internal gear ring drive coupling motor according to claim 1, characterized in that: The adapter end cap (11) is provided with a through hole (14) for the output shaft (5) to extend out. The lower end of the sealing ring (13) is open and a deformation groove (15) is formed on the inner side. The upper edge of the through hole (14) forms a guide inclined wall (16). The sealing ring (13) is installed into the through hole (14) along the guide inclined wall (16).

4. A small-ratio internal gear ring drive coupling motor according to claim 3, characterized in that: The upper part of the outer wall of the sealing ring (13) is provided with a sealing ring wall (17) that cooperates with the output shaft (5).

5. A small-ratio internal gear ring drive coupling motor according to claim 4, characterized in that: The lower part of the outer wall of the sealing ring (13) is provided with a sealing lip (18) that cooperates with the output shaft (5).

6. A small-ratio internal gear ring drive coupling motor according to claim 5, characterized in that: An elastic ring (19) is fitted on the inner wall of the sealing ring (13) near the output shaft (5).

7. A small-ratio internal gear ring drive coupling motor according to claim 1, characterized in that: The inner wall of the rear end cover (10) is provided with a support ring (20) protruding inward, and a support groove is formed in the support ring (20). The motor shaft (2) is connected to the support groove through a second deep groove ball bearing (21). The bottom of the support groove is provided with a mating hole (22) for the helical gear (8) to extend out. A ring of convex wall (23) is provided on the side wall of the motor shaft (2). The axial inner end of the second deep groove ball bearing (21) abuts against the convex wall (23).

8. A small-ratio internal gear ring drive coupling motor according to claim 7, characterized in that: An assembly groove (24) is formed between the rotor and the stator, the second deep groove ball bearing (21) is located in the assembly groove (24), and the support ring (20) extends into the assembly groove (24).

9. A small-ratio internal gear ring drive coupling motor according to claim 8, characterized in that: The inner wall of the rear cover (10) is provided with an overlapping ring (25) on the outside of the support ring (20), and the housing (1) is provided with an overlapping groove (26) that cooperates with the overlapping ring (25).

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