Motor, chassis system and vehicle

Abstract

The utility model discloses a motor, chassis system and vehicle, relates to motor technical field, wherein the motor casing includes casing, stator, rotor and bearing, the casing is in the tubular arrangement, the casing has the first casing section and the second casing section that distributes along its axial direction, the inside diameter of first casing section is less than the inside diameter of second casing section, and the bearing is equipped with the first casing section and the second casing section. A connecting shell section is arranged between the first shell section and the second shell section, the stator is arranged in the second shell section, the rotor is rotationally arranged in the stator, an inner ring of the bearing is arranged at the end of the rotor in a sleeving mode, an outer ring of the bearing is arranged in the first shell section in a sleeving mode, and at least part of the connecting shell section is bent and extends to form a step part. The step part enables the first shell section and the second shell section to be elastically connected and have a height difference in the axial direction of the shell, so that the deformation amount of the shell in the axial direction of the shell is reduced, the strength of the shell is improved, and the deformation amount of the shell in the axial direction can be reduced when the shell is subjected to large axial impact.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a motor, chassis system and vehicle. Background Technology

[0002] With the increasing demand for intelligent vehicle systems, the industry's demand for drive-by-wire chassis technology has also become increasingly apparent. Within chassis systems, the adoption rate of hydraulic brake-by-wire systems is showing a significant upward trend, making Emergency Braking (EHB) a mainstream technology solution. In EHB, the motor rotor is connected to a ball screw structure and controlled by a solenoid valve to achieve intelligent active braking.

[0003] Due to the extremely limited space in vehicles, automotive motors face strict requirements regarding size, weight, manufacturability, and cost. Therefore, automotive motor housings often employ thin-walled structures and are formed by stamping and stretching steel sheets. However, existing motor housings manufactured using this stamping and stretching process often have two cylindrical sections formed by direct bending, resulting in poor axial load-bearing capacity. If the axial force is too large, the motor housing is prone to deformation or twisting. Utility Model Content

[0004] The main purpose of this utility model is to propose a motor, chassis system and vehicle, which aims to solve the problem of poor axial load-bearing capacity of existing motor housings.

[0005] To achieve the above objectives, the present invention provides a motor comprising:

[0006] The shell is cylindrical in shape and has a first shell section and a second shell section arranged along its axial direction. The inner diameter of the first shell section is smaller than the inner diameter of the second shell section, and a connecting shell section is provided between the first shell section and the second shell section.

[0007] The stator is disposed within the second housing section;

[0008] The rotor is rotatably disposed within the stator; and,

[0009] The bearing has its inner ring fitted onto the end of the rotor and its outer ring fitted into the first housing section.

[0010] The connecting housing segment is at least partially bent to form a stepped portion, which allows for an elastic connection between the first housing segment and the second housing segment and has a height difference along the axial direction of the housing to reduce the deformation of the housing along its axial direction.

[0011] In one embodiment, the stepped portion includes multiple stepped sections, which are arranged along the axial direction of the housing.

[0012] In one embodiment, each of the stepped portions has a dividing platform surface extending radially along the housing and a dividing drop surface extending axially along the housing, wherein:

[0013] The platform surfaces of the multiple stepped sections are arranged in parallel; and / or,

[0014] The drop surfaces of the multiple stepped sections are arranged in parallel; and / or,

[0015] In one of the stepped sections, a transition arc surface is provided between the stepped platform surface and the stepped drop surface.

[0016] In one embodiment, two adjacent step portions include a first step portion closer to the first housing segment and a second step portion farther away from the first housing segment, wherein the radius of the arc of the transition surface of the first step portion is greater than the radius of the arc of the transition surface of the second step portion.

[0017] In one embodiment, the width of the platform surface of the first step portion is greater than the width of the platform surface of the second step portion; and / or,

[0018] The drop height of the first step section is greater than the drop height of the second step section.

[0019] In one embodiment, the end of the first housing segment away from the second housing segment is closed by a first housing cover; and / or,

[0020] The rotor includes a rotating shaft and a rotor core. The rotor core is sleeved on the rotating shaft, which is hollow and passes through the bearing.

[0021] In one embodiment, the length of the first housing segment in the axial direction of the housing is L1, and the stepped portion has a step drop H1 in the axial direction of the housing, wherein H1 ≥ L1 * 50%.

[0022] In one embodiment, the diameter of the second housing segment is D1, and the stepped portion has a drop surface extending along the axial direction of the housing, the diameter of the drop surface being D2, wherein D2 ≤ D1 * 80%.

[0023] In one embodiment, the diameter of the second housing segment is D1, the stepped portion includes a plurality of stepped sections, the plurality of stepped sections are arranged along the axial direction of the housing, each stepped section has a drop surface extending along the axial direction of the housing, the plurality of drop surfaces include a first drop surface disposed adjacent to the second housing segment, the diameter of the first drop surface is D3, wherein D3≤D1*80%.

[0024] In one embodiment, the stepped portion includes a platform surface extending radially along the housing and a drop surface extending axially along the housing, with a transition arc surface provided between the platform surface and the drop surface.

[0025] This utility model also provides a chassis system, including a vehicle body and a braking system disposed on the vehicle body, the braking system including a motor, the motor including:

[0026] The shell is cylindrical in shape and has a first shell section and a second shell section arranged along its axial direction. The inner diameter of the first shell section is smaller than the inner diameter of the second shell section, and a connecting shell section is provided between the first shell section and the second shell section.

[0027] The stator is disposed within the second housing section;

[0028] The rotor is rotatably disposed within the stator; and,

[0029] The bearing has its inner ring fitted onto the end of the rotor and its outer ring fitted into the first housing section.

[0030] The connecting housing segment is at least partially bent to form a stepped portion, which allows for an elastic connection between the first housing segment and the second housing segment and has a height difference along the axial direction of the housing to reduce the deformation of the housing along its axial direction.

[0031] This utility model also provides a vehicle, including a chassis system, the chassis system including a vehicle body and a braking system disposed on the vehicle body, the braking system including a motor, the motor including:

[0032] The shell is cylindrical in shape and has a first shell section and a second shell section arranged along its axial direction. The inner diameter of the first shell section is smaller than the inner diameter of the second shell section, and a connecting shell section is provided between the first shell section and the second shell section.

[0033] The stator is disposed within the second housing section;

[0034] The rotor is rotatably disposed within the stator; and,

[0035] The bearing has its inner ring fitted onto the end of the rotor and its outer ring fitted into the first housing section.

[0036] The connecting housing segment is at least partially bent to form a stepped portion, which allows for an elastic connection between the first housing segment and the second housing segment and has a height difference along the axial direction of the housing to reduce the deformation of the housing along its axial direction.

[0037] The technical solution of this utility model involves a cylindrical housing with a first housing segment and a second housing segment arranged axially. The inner diameter of the first housing segment is smaller than that of the second housing segment. The first housing segment is used to install the bearings of the motor, and the second housing segment is used to install the stator and rotor of the motor. A connecting housing segment connects the first housing segment and the second housing segment. The connecting housing segment is at least partially bent to form a stepped portion. The stepped portion allows for an elastic connection between the first housing segment and the second housing segment and has a height difference along the axial direction of the housing, thereby reducing the axial deformation of the housing. This design increases the strength of the housing and reduces the axial deformation of the housing when subjected to large axial impacts, thus solving the problem of poor axial load-bearing capacity of existing motor housings. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0039] Figure 1 A cross-sectional view of an embodiment of the motor provided by this utility model;

[0040] Figure 2 for Figure 1 A three-dimensional structural diagram of the shell inside;

[0041] Figure 3 for Figure 1 A cross-sectional view of the shell structure;

[0042] Figure 4 This is a schematic diagram of the three-dimensional structure of the existing shell.

[0043] Explanation of icon numbers:

[0044] 100. Motor; 1. Housing; 11. First housing section; 12. Second housing section; 13. Connecting housing section; 14. First housing cover; 2. Step section; 21. First step section; 211. Platform surface; 212. Drop surface; 213. Transition arc surface; 22. Second step section; 3. Stator; 4. Rotor; 41. Shaft; 42. Rotor core; 5. Bearing.

[0045] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0046] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0047] It should be noted that if the embodiments of this utility model involve directional indication, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0048] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0049] With the increasing demand for intelligent vehicle systems, the industry's demand for drive-by-wire chassis technology has also become increasingly apparent. Within chassis systems, the adoption rate of hydraulic brake-by-wire systems is showing a significant upward trend, making Emergency Braking (EHB) a mainstream technology solution. In EHB, the motor rotor is connected to a ball screw structure and controlled by a solenoid valve to achieve intelligent active braking.

[0050] There are three existing manufacturing processes for motor housings: the first is precision machining of steel die-cast blanks; the second is precision machining of aluminum die-cast blanks; and the third is direct stamping and stretching of steel plates without secondary processing. Due to the extremely limited space in automotive applications, automotive motors have strict requirements regarding size, weight, manufacturability, and cost. The third process offers advantages such as good manufacturability, light weight, and low cost; therefore, automotive motor housings often employ thin-walled structures and are formed by stamping and stretching steel plates. However, existing motor housings manufactured using the steel plate stamping and stretching process often have two cylindrical sections formed by direct bending, resulting in poor axial load-bearing capacity. If the axial force is too large, the motor housing is prone to deformation or twisting.

[0051] Based on this, this utility model proposes a motor designed to solve the problem of poor axial load-bearing capacity of existing motor housings. Specifically, Figures 1 to 3 This is a schematic diagram of the structure of the motor of this utility model; Figure 4 This is a schematic diagram of the existing motor housing.

[0052] Please see Figures 1 to 3 In one embodiment of the present invention, the motor 100 includes a housing 1, a stator 3, a rotor 4, and a bearing 5. The housing 1 has a first housing section 11 with a smaller diameter in its axial direction, a second housing section 12 with a larger diameter, and a connecting housing section 13 connecting the first housing section 11 and the second housing section 12. A stepped portion 2 is formed in the connecting housing section 13. The stator 3 is disposed in the second housing section 12. The rotor 4 is rotatably disposed in the stator 3. The bearing 5 is disposed at the end of the rotor 3 and is disposed in the first housing section 11.

[0053] In the technical solution of this utility model, the housing 1 is cylindrical and has a first housing segment 11 and a second housing segment 12 arranged along its axial direction. The inner diameter of the first housing segment 11 is smaller than the inner diameter of the second housing segment 12. The first housing segment 11 is provided for mounting the bearing 5 of the motor, and the second housing segment 12 is provided for mounting the stator 3 and rotor 4 of the motor. The first housing segment 11 and the second housing segment 12 are connected by a connecting housing segment 13. The connecting housing segment 13 is at least partially bent and extended to form a stepped portion 2. The stepped portion 2 allows the first housing segment 11 and the second housing segment 12 to be elastically connected and have a height difference along the axial direction of the housing 1, thereby reducing the deformation of the housing 1 along its axial direction. This configuration increases the strength of the housing 1 and reduces the deformation of the housing 1 along its axial direction when subjected to a large axial impact, thus solving the problem of poor axial load-bearing capacity of existing motor housings.

[0054] It is understood that the connecting housing segment 13 is at least partially bent and has a bending component along the axial direction of the housing 1, making the connecting housing segment 13 similar to a connecting spring with an elastic compression. The first housing segment 11 and the second housing segment 12 are similarly connected by the connecting spring. When the housing 1 is subjected to axial impact, the energy absorption effect of the elastic deformation reduces the deformation of the housing 1 along the axial direction, thereby protecting the housing.

[0055] It should be noted that the housing 1 refers to a structure capable of forming an internal environment, which can be used to install the stator 3 and rotor 4 of the motor. The housing 1 can be an open structure with one end open or an open structure with both ends open, as long as it forms an internal environment for installing the stator 3 and rotor 4 of the motor. This utility model does not limit this. The housing 1 can have various shapes, such as cylindrical or prismatic, as long as it can accommodate the stator 3 and rotor 4 of the motor. This utility model does not limit this. The first housing segment 11, with a smaller diameter, is mainly used for installing the motor, while the second housing segment 12, with a larger diameter, is mainly used for installing the stator 3 and rotor 4 of the motor. The connecting housing segment 13 extends radially along the housing 1 and is used to connect the first housing segment 11 and the second housing segment 12. Furthermore, the stepped portion 2 can have various shapes, such as circular or polygonal, and this utility model does not limit this.

[0056] It should also be noted that you can refer to [link / reference]. Figure 4 The connecting housing section 13 between the first housing section 11 and the second housing section 12 of the existing motor housing is usually formed by direct bending. When the axial impact on the motor housing is too large, the motor housing is prone to deformation or twisting. Therefore, in this utility model, the step portion 2 is formed on the connecting housing, which can not only give the connecting housing section 13 a certain deformation margin to buffer the axial impact, but also increase the strength of the connecting housing section 13, thereby improving the housing 1's ability to resist axial impact.

[0057] Furthermore, the number of the step portion 2 can vary, including one or more, and this utility model does not limit this. Specifically, in this embodiment, the step portion 2 includes multiple step segments, which are arranged along the axial direction of the housing 1. By providing multiple step segments, the connecting housing segment 13 can withstand greater axial impact, thereby helping to improve the housing 1's resistance to axial impact.

[0058] In one embodiment of this utility model, each of the stepped portions has a platform surface 211 extending radially along the housing 1, and the platform surfaces 211 of the multiple stepped portions are arranged in parallel. This parallel arrangement of the multiple platform surfaces 211 facilitates integral stamping. Of course, in other embodiments, the multiple platform surfaces 211 may intersect, and this utility model does not limit this.

[0059] In one embodiment of this utility model, each of the stepped portions has a drop surface 212 extending along the axial direction of the housing 1, and the drop surfaces 212 of the multiple stepped portions are arranged in parallel. This parallel arrangement of the multiple drop surfaces 212 facilitates integral stamping. Of course, in other embodiments, the multiple drop surfaces 212 may also intersect, and this utility model does not limit this.

[0060] In one embodiment of the present invention, each of the step portions has a platform surface 211 extending radially along the housing 1 and a drop surface 212 extending axially along the housing 1. In one of the step portions, a transition arc surface 213 is provided between the platform surface 211 and the drop surface 212. Thus, by providing the transition arc surface 213, the platform surface 211 can smoothly transition to the drop surface 212, so as to avoid stress concentration.

[0061] It should be noted that the above three related technical features: "the multiple platform surfaces 211 of the step divisions are arranged in parallel", "the multiple drop surfaces 212 of the step divisions are arranged in parallel", and "a transition arc surface 213 is provided between the platform surfaces 211 and the drop surfaces 212", can be set in one, two, or simultaneously. This utility model does not limit the specific features in this regard.

[0062] In one embodiment of this utility model, two adjacent stepped portions include a first stepped portion 21 closer to the first housing segment 11 and a second stepped portion 22 farther away from the first housing segment 11. The radius of the arc of the transition arc surface 213 of the first stepped portion 21 is greater than the radius of the arc of the transition arc surface 213 of the second stepped portion 22. Since the closer to the first housing segment 11, the greater the axial impact, the larger the radius of the transition arc surface 213 of the first stepped portion 21 is adopted, so that the first stepped portion 21 can withstand a greater axial impact, thereby helping to improve the resistance of the housing 1 to axial impact.

[0063] In some embodiments, the width of the platform surface 211 of the first step portion 21 is greater than the width of the platform surface 211 of the second step portion 22. Thus, the platform surface 211 of the first step portion 21 has a larger width so that the first step portion 21 has sufficient width to facilitate the forming of the transition arc surface 213 of the first step portion 21.

[0064] In some embodiments, the drop height of the drop surface 212 of the first step portion 21 is greater than the drop height of the drop surface 212 of the second step portion 22. Thus, the drop surface 212 of the first step portion 21 has a larger height so that the first step portion 21 has sufficient height to facilitate the forming of the transition arc surface 213 of the first step portion 21.

[0065] It should be noted that the above two related technical features, namely, "the width of the platform surface 211 of the first step portion 21 is greater than the width of the platform surface 211 of the second step portion 22" and "the drop height of the drop surface 212 of the first step portion 21 is greater than the drop height of the drop surface 212 of the second step portion 22", can be set either one or both, and this utility model does not limit them.

[0066] The first housing segment 11 can be of various types. The first housing segment 11 can be an open structure with both ends open, or a closed structure with one end sealed, etc. This utility model does not limit this. Specifically, in this embodiment, the end of the first housing segment 11 away from the second housing segment 12 is closed by the first housing cover 14. In this way, by setting the first housing cover 14 to close the end of the first housing segment 11 away from the second housing segment 12, it is beneficial to improve the sealing performance of the housing 1, so as to prevent impurities from entering the housing 1 through the first housing cylinder 111.

[0067] In one embodiment of the present invention, the length of the first housing segment 11 in the axial direction of the housing 1 is L1, and the step portion 2 has a step drop H1 in the axial direction of the housing 1, wherein H1≥L1*50%, so as to ensure that the housing 1 has sufficient deformation margin to buffer the axial impact of the housing 1.

[0068] It should be noted that the step drop refers to the total height of the step portion 2 in the axial direction of the housing 1. If the step portion 2 has only one step section, the step drop is the height of the step section's drop surface 212. If the step portion 2 has multiple step sections, the step drop is the sum of the heights of the multiple drop surfaces 212.

[0069] In one embodiment of the present invention, the diameter of the second housing segment 12 is D1, and the step portion 2 has a drop surface extending along the axial direction of the housing 1, the diameter of the drop surface being D2, wherein D2≤D1*80%, so that the step portion 2 can maintain a certain distance from the second housing segment 12, so as to prevent the step portion 2 from being connected to the second housing segment 12 as a whole.

[0070] Furthermore, the diameter of the second housing segment 12 is D1, and the step portion 2 includes multiple step segments arranged along the axial direction of the housing 1. Each step segment has a drop surface 212 extending along the axial direction of the housing 1. The multiple drop surfaces 212 include a first drop surface 212 disposed adjacent to the second housing segment 12. The diameter of the first drop surface 212 is D3, wherein D3≤D1*80%, so that the first drop surface 212 can maintain a certain distance from the second housing segment 12 to prevent the step portion 2 from being connected to the second housing segment 12 as a whole.

[0071] In one embodiment of the present invention, the stepped portion 2 includes a platform surface extending radially along the housing 1 and a drop surface extending axially along the housing 1. A transition arc surface is provided between the platform surface and the drop surface. Thus, by providing the transition arc surface, the platform surface can smoothly transition to the drop surface, so as to avoid stress concentration.

[0072] In some embodiments, please refer to Figure 1 The rotor 4 includes a rotating shaft 41 and a rotor core 42. The rotor core 42 is sleeved on the rotating shaft 41. The rotating shaft 41 is hollow and passes through the bearing 5. In this way, by setting the rotor core 42, a magnetic circuit is formed and eddy current loss is reduced. At the same time, the rotating shaft 41 is hollow to reduce the weight of the rotating shaft 41, which helps to achieve the weight reduction of the motor 100.

[0073] This utility model also proposes a chassis system, which includes a vehicle body and a braking system disposed on the vehicle body, the braking system including a motor. The specific structure of this chassis system is as described in the above embodiments. Since this chassis system adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here.

[0074] This utility model also proposes a vehicle, which includes a chassis system. The specific structure of the vehicle is as described in the above embodiments. Since this vehicle adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0075] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An electric motor, characterized in that, The motor includes: The shell is cylindrical in shape and has a first shell section and a second shell section arranged along its axial direction. The inner diameter of the first shell section is smaller than the inner diameter of the second shell section, and a connecting shell section is provided between the first shell section and the second shell section. The stator is disposed within the second housing section; The rotor is rotatably disposed within the stator; and, The bearing has its inner ring fitted onto the end of the rotor and its outer ring fitted into the first housing section. The connecting housing segment is at least partially bent to form a stepped portion, which allows for an elastic connection between the first housing segment and the second housing segment and has a height difference along the axial direction of the housing to reduce the deformation of the housing along its axial direction.

2. The motor as described in claim 1, characterized in that, The stepped portion includes multiple stepped sections, which are arranged along the axial direction of the housing.

3. The motor as described in claim 2, characterized in that, Each of the aforementioned step portions has a dividing platform surface extending radially along the housing, and a dividing drop surface extending axially along the housing, wherein: The platform surfaces of the multiple stepped sections are arranged in parallel; and / or, The drop surfaces of the multiple stepped sections are arranged in parallel; and / or, In one of the stepped sections, a transition arc surface is provided between the stepped platform surface and the stepped drop surface.

4. The motor as described in claim 3, characterized in that, The two adjacent step portions include a first step portion closer to the first housing segment and a second step portion farther away from the first housing segment, wherein the radius of the arc of the transition surface of the first step portion is greater than the radius of the arc of the transition surface of the second step portion.

5. The motor as described in claim 4, characterized in that, The width of the platform surface of the first step section is greater than the width of the platform surface of the second step section; and / or, The drop height of the first step section is greater than the drop height of the second step section.

6. The motor as described in claim 1, characterized in that, The end of the first housing segment away from the second housing segment is closed by a first housing cover; and / or, The rotor includes a rotating shaft and a rotor core. The rotor core is sleeved on the rotating shaft, which is hollow and passes through the bearing.

7. The motor as described in claim 1, characterized in that, The length of the first housing segment in the axial direction of the housing is L1, and the stepped portion has a step drop H1 in the axial direction of the housing, wherein H1≥L1*50%.

8. The motor as described in claim 1, characterized in that, The diameter of the second shell section is D1, and the stepped portion has a drop surface extending along the axial direction of the shell, the outer diameter of the drop surface being D2, wherein D2≤D1*80%.

9. The motor as described in claim 1, characterized in that, The diameter of the second shell section is D1. The stepped portion includes multiple stepped sections, which are arranged along the axial direction of the shell. Each stepped section has a drop surface extending along the axial direction of the shell. The multiple drop surfaces include a first drop surface adjacent to the second shell section. The diameter of the first drop surface is D3, where D3 ≤ D1 * 80%.

10. The motor as described in claim 1, characterized in that, The stepped portion includes a platform surface extending radially along the housing and a drop surface extending axially along the housing, with a transition arc surface provided between the platform surface and the drop surface.

11. A chassis system, characterized in that, It includes a vehicle body and a braking system disposed on the vehicle body, the braking system including a motor as described in any one of claims 1 to 10.

12. A vehicle, characterized in that, Includes the chassis system as described in claim 11.

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