Motor and vehicle with same

Abstract

The motor comprises a rotating shaft which is provided with a first stop structure, an end cover which is provided with a shaft hole, the rotating shaft is inserted into the shaft hole, a first annular gap is formed between the rotating shaft and the hole wall of the shaft hole, and a sealing ring is arranged in the first annular gap and is sleeved outside the rotating shaft. A second annular gap is formed between the inner ring face of the sealing ring and the rotating shaft, the sealing ring is in sealing connection with the hole wall of the shaft hole, the first end face of the sealing ring and the stop ring face of the first stop structure form surface contact, and the pressing structure is used for applying force to the sealing ring so that the sealing ring and the stop ring face can be in the surface contact state all the time. According to the utility model, the pressing structure applies force to the sealing ring to enable the first end face of the sealing ring to be always tightly attached to the stop ring surface of the rotating shaft, so that in the rotating process of the rotating shaft, even if the first end face of the sealing ring and the stop ring surface of the rotating shaft are abraded, a gap is not generated between the first end face of the sealing ring and the stop ring surface, and the condition of sealing failure is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicles, and in particular relates to a motor and a vehicle with the motor. Background Art

[0002] When the motor is working in harsh conditions such as high humidity and dust, there is a great risk of damage. External impurities such as sand or water entering the motor will corrode the internal metal parts of the motor, seriously affecting the performance of the motor and even causing the motor to burn out. Fig. 9 As shown, the mainstream waterproof seal in the industry installs the oil seal at the position where the shaft passes through the end cover. The oil seal serves to isolate the inner and outer cavities of the motor. The oil seal fits the outer circumference of the shaft. Lubricating grease is applied to one side of the oil seal during installation to ensure the sealing of the inner and outer cavities of the motor. However, since the thermal conductivity of the oil seal material itself is poor and the lip hardness of the oil seal is large, the mechanical loss caused by friction between the oil seal and the shaft is also relatively large. In addition, the oil seal is in contact and friction with the outer circumference of the shaft for a long time, which can easily wear the contact surface of the shaft and cause a gap between the shaft and the oil seal, thereby making the oil seal seal invalid. If the working conditions are severe, impurities and water can easily enter the motor and damage the motor. Utility Model Content

[0003] Therefore, the utility model provides a motor that can solve the technical problem that the existing motor uses an oil seal that fits the outer circumferential surface of the rotating shaft and easily causes wear between the two, thereby causing a gap between the oil seal and the rotating shaft, and further causing the seal to fail.

[0004] In order to solve the above problems, the utility model provides a rotor baffle, comprising: a rotating shaft, an end cover, a sealing ring and a clamping structure, the rotating shaft is provided with a first stop structure, the first stop structure has a stop ring surface surrounding the rotating shaft, the end cover is configured with an axial hole, the rotating shaft is inserted into the axial hole, and a first annular gap is formed between the rotating shaft and the hole wall of the axial hole, the sealing ring is arranged in the first annular gap and is sleeved outside the rotating shaft, a second annular gap is formed between the inner ring surface of the sealing ring and the rotating shaft, the sealing ring is sealingly connected to the hole wall of the axial hole, the first end face of the sealing ring forms a surface contact with the stop ring surface, and the clamping structure is used to apply force to the sealing ring so that the sealing ring and the stop ring surface are always in a surface contact state.

[0005] In some embodiments, the sealing ring includes a ring body and a sealing ring mounted on the ring body, the ring body is mounted outside the rotating shaft, there is the second annular gap between the inner ring surface of the ring body and the rotating shaft, there is a third annular gap between the outer ring surface of the ring body and the hole wall of the axial hole, the first end face of the ring body forms a surface contact with the stop ring surface, and the sealing ring is sealed and connected to the hole wall of the axial hole.

[0006] In some embodiments, the ring body is made of a conductive material.

[0007] In some embodiments, the end cover has a second stop structure, the second stop structure is located on the extension path of the shaft hole, and the sealing ring is clamped between the first stop structure and the second stop structure.

[0008] In some embodiments, the second stop structure surrounds the shaft hole.

[0009] In some embodiments, the clamping structure is mounted on the end cover, the clamping structure abuts against the second end surface of the sealing ring, and there is elastic extrusion between the clamping structure and the sealing ring.

[0010] In some embodiments, the clamping structure includes a pressure cover and an elastic member installed on the pressure cover, the pressure cover is installed on the end cover, and the elastic member abuts against the second end surface of the sealing ring.

[0011] In some embodiments, the number of the elastic members is two, and the two elastic members are spaced apart on the pressure cover. Along the axial direction of the rotating shaft, with the stop ring surface as the projection surface, the projection of one of the elastic members is completely within the stop ring surface, the projection part of the other elastic member is within the stop ring surface, and the remaining part is outside the stop ring surface.

[0012] In some embodiments, the elastic member is a wave spring washer.

[0013] The utility model also provides a vehicle, comprising the above-mentioned motor.

[0014] The utility model provides a motor and a vehicle having the same, which has the following beneficial effects:

[0015] The present application improves the structure of the rotating shaft and adopts a sealing ring, a clamping structure and a new installation method to replace the oil seal. Because the clamping structure applies force to the sealing ring so that the first end face of the sealing ring is always in close contact with the stop ring surface of the rotating shaft, during the rotation of the rotating shaft, even if the first end face of the sealing ring and the stop ring surface of the rotating shaft are worn, no gap will be generated between the two, thereby preventing the seal from failing. At the same time, since there is an annular gap between the inner ring surface of the sealing ring and the rotating shaft, during the rotation of the rotating shaft, no friction will be generated between the inner ring surface of the sealing ring and the rotating shaft, thereby reducing the wear between the two and reducing the resistance encountered by the rotating shaft when rotating. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0017] Figure 1 A cross-sectional view of a motor according to an embodiment of the present utility model;

[0018] Figure 2 for Figure 1 It is an enlarged schematic diagram of point A of the motor of the embodiment of the utility model;

[0019] Figure 3 A cross-sectional view of a rotating shaft and an end cover of a motor according to an embodiment of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the sealing ring of the motor according to an embodiment of the utility model;

[0021] Figure 5 This is an exploded schematic diagram of a sealing ring of a motor according to an embodiment of the utility model;

[0022] Figure 6 It is a front view of the motor of the embodiment of the utility model;

[0023] Figure 7 A cross-sectional view of a compression structure of a motor according to an embodiment of the utility model;

[0024] Figure 8 It is a front view of the clamping structure of the motor according to an embodiment of the utility model;

[0025] Fig. 9 is a cross-sectional view of a motor in the prior art;

[0026] Fig.10 It is a cross-sectional view of the rotating shaft and end cover of the motor in the prior art.

[0027] The reference numerals are:

[0028] 1. Rotating shaft; 2. End cover; 3. Sealing ring; 31. Ring body; 32. Sealing ring; 4. First stop structure; 5. Groove; 6. Second stop structure; 7. Pressing structure; 71. Pressure cover; 72. Elastic member; 8. Bearing; 9. Bearing steel sleeve; 10. Bearing baffle; 11. Oil seal. DETAILED DESCRIPTION

[0029] 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. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0030] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0031] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0032] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0033] See also Figures 1 to 10As shown, according to an embodiment of the utility model, a motor is provided, comprising: a rotating shaft 1, an end cover 2, a sealing ring 3 and a clamping structure 7, the rotating shaft 1 is provided with a first stop structure 4, the first stop structure 4 has a stop ring surface surrounding the rotating shaft 1, an axial hole is constructed on the end cover 2, the rotating shaft 1 is inserted into the axial hole, and a first annular gap is formed between the rotating shaft 1 and the hole wall of the axial hole, the sealing ring 3 is arranged in the first annular gap and is sleeved outside the rotating shaft 1, a second annular gap is formed between the inner ring surface of the sealing ring 3 and the rotating shaft 1, the sealing ring 3 is sealed and connected to the hole wall of the axial hole, the first end face of the sealing ring 3 forms a surface contact with the stop ring surface, and the clamping structure 7 is used to apply force to the sealing ring 3 so that the sealing ring 3 and the stop ring surface are always in a surface contact state.

[0034] In this technical solution, the structure of the rotating shaft 1 is improved, and the sealing ring 3, the clamping structure 7 and the new installation method are used to replace the oil seal 11. Because the clamping structure 7 applies force to the sealing ring 3 so that the first end face of the sealing ring 3 is always close to the stop ring surface of the rotating shaft 1, during the rotation of the rotating shaft 1, even if the first end face of the sealing ring 3 and the stop ring surface of the rotating shaft 1 are worn, no gap will be generated between the two, so that the sealing failure will not occur. At the same time, since there is an annular gap between the inner ring surface of the sealing ring 3 and the rotating shaft 1, during the rotation of the rotating shaft 1, no friction will be generated between the inner ring surface of the sealing ring 3 and the rotating shaft 1, thereby reducing the wear between the two and reducing the resistance encountered by the rotating shaft 1 when rotating. Among them, the end cover 2 refers to the front end cover of the motor.

[0035] See also Figure 1 , Figure 2 and Figure 4 As shown, the sealing ring 3 includes a ring body 31 and a sealing ring 32 mounted on the ring body 31. The ring body 31 is mounted outside the rotating shaft 1. There is a second annular gap between the inner ring surface of the ring body 31 and the rotating shaft 1, and there is a third annular gap between the outer ring surface of the ring body 31 and the hole wall of the shaft hole. The first end face of the ring body 31 forms a surface contact with the stop ring surface, and the sealing ring 32 is sealed and connected to the hole wall of the shaft hole.

[0036] In this embodiment, the height of the ring body 31 in the radial direction exceeds the height of the stop ring surface, and the axial thickness of the sealing ring 32 is less than the axial thickness of the ring body 31, so that the ring body 31 can form a better support for the sealing ring 32. Since the motor generates a lot of heat during operation, the ring body 31 and the end cover 2 will expand due to heat. The present application adopts a combination of the ring body 31 and the sealing ring 32, and an annular gap is generated between the outer ring surface of the ring body 31 and the hole wall of the shaft hole, which is equivalent to leaving an expansion margin, so as to prevent the ring body 31 and the end cover 2 from being damaged by each other due to extrusion after thermal expansion. Among them, the material of the sealing ring 32 can be fluororubber, the width of the second annular gap, that is, half of the difference between the outer diameter and the inner diameter of the second annular gap is 0-0.03mm, and the width of the third annular gap, that is, half of the difference between the outer diameter and the inner diameter of the third annular gap is 0-0.03mm.

[0037] See also Figure 4 and Figure 5 As shown, a groove 5 surrounding the ring body 31 is formed on the outer circumferential surface thereof, and the sealing ring 32 is clamped in the groove 5 .

[0038] In this technical solution, when the sealing ring 32 is stuck in the groove 5 on the ring body 31, the sealing ring 32 can be installed more stably, and even if it is vibrated when the motor is working, the sealing ring 32 will not be lost, thereby ensuring the sealing stability between the sealing ring 32 and the end cover 2. Among them, the size requirement of the groove 5 is that the size of its cross section is half the size of the cross section of the sealing ring 32.

[0039] As a specific implementation, the ring body 31 is made of conductive material.

[0040] In this embodiment, when the material of the ring body 31 is a conductive material, it indicates that the ring body 31 has conductivity, so that part of the shaft current generated by the motor can be conducted to the outside to reduce the shaft current. When the influence of the shaft current is reduced, the service life of the motor bearing can be further improved.

[0041] It should be noted that the ring body 31 can be made of graphite. Since graphite has the characteristics of conductivity, good self-lubrication and high rebound coefficient, and its friction resistance is also smaller than that of the oil seal 11, it can reduce the mechanical wear on the stop ring surface of the rotating shaft 1. While achieving the sealing of the rotating mechanical parts and improving the IP protection level of the motor, it can also ensure that the rotating shaft 1 can rotate smoothly, which also appropriately improves the motor noise and motor energy consumption. At the same time, because the graphite ring has good heat dissipation capacity, it can also guide part of the heat generated by the motor rotor. In addition, the ring body 31 can also be made of metal materials and non-metallic materials with conductive properties, such as polyetheretherketone, molybdenum disulfide, zirconium disulfide, etc.

[0042] See also Figures 1 to 3 As shown, the end cover 2 has a second stop structure 6 , which is located on the extension path of the shaft hole, and the sealing ring 3 is clamped between the first stop structure 4 and the second stop structure 6 .

[0043] In this technical solution, the second stop structure 6 surrounds the shaft hole. Compared with the end cover 2 of the prior art, the second stop structure 6 is improved from the inner side of the end cover 2 to the outer side of the end cover 2, and the extension length of the second stop structure 6 in the radial direction is reduced, that is, the structure of the end cover 2 is also optimized in this application. For details, see Figure 3 and Fig.10 Among them, the second stop structure 6 on the end cover 2 can have an installation positioning function. For example, during the assembly of the end cover 2, if the second stop structure 6 of the end cover 2 is felt to abut against the ring body 31, it indicates that the end cover 2 is installed in place. At the same time, when the ring body 31 is clamped between the first stop structure 4 and the second stop structure 6, the ring body 31 can be fixed and the motor can be further sealed.

[0044] See also Figure 1 As shown, the pressing structure 7 is installed on the end cover 2, the pressing structure 7 abuts against the second end surface of the sealing ring 3, and there is elastic extrusion between the pressing structure 7 and the sealing ring 3.

[0045] In this embodiment, the pressing structure 7 abuts against the second end surface of the sealing ring 3, that is, the pressing structure 7 abuts against the second end surface of the ring body 31. The elastic compression of the sealing ring 3 by the pressing structure 7 can ensure that the ring body 31 and the stop ring surface are always closely fitted, and this implementation method is relatively simple.

[0046] See also Figure 1 and Figure 2 As shown, the pressing structure 7 includes a pressing cover 71 and an elastic member 72 installed on the pressing cover 71 . The pressing cover 71 is installed on the end cover 2 , and the elastic member 72 abuts against the second end surface of the sealing ring 3 .

[0047] In this technical solution, the gland 71 can provide better support for the elastic member 72, so that the elastic member 72 can better apply elastic force to the ring body 31 of the sealing ring 3. Compared with the clamping structure 7 made of elastic material as a whole to clamp the ring body 31, the combination of the gland 71 and the elastic member 72 has a better clamping effect, thereby better ensuring the sealing effect. Among them, the elastic member 72 abuts against the second end face of the sealing ring 3, that is, the elastic member 72 abuts against the second end face of the ring body 31. There are four threaded holes on the gland 71 and the end cover 2. The gland 71 is installed on the end cover 2 by four screws. The four screws are evenly distributed along the circumference of the gland 71, so that the gland 71 is installed on the end cover 2 with uniform force. For details, please refer to Figures 6 to 8 shown.

[0048] It should be noted that the assembly process of the rotating shaft 1, the end cover 2, the ring body 31, the sealing ring 32, the pressure cover 71 and the elastic member 72 in actual production is: first, the sealing ring 32 is put on the ring body 31, and then the sealing ring 3 formed by the combination of the ring body 31 and the sealing ring 32 is put on the rotating shaft 1, and the ring body 31 is made to fit tightly against the stop ring surface of the rotating shaft 1; then the end cover 2 is inserted, and the end cover 2 and the ring body 31 are clearance fit, but the sealing ring 32 and the end cover 2 are interference fit; next, the elastic member 72 is installed on the pressure cover 71, and finally the pressure cover 71 is fixed to the end cover 2 with four screws.

[0049] See also Figure 1 and Figure 2 As shown, the pressure cover 71 has a protrusion, which extends into the shaft hole, and the elastic member 72 is installed on the protrusion.

[0050] In this embodiment, a protrusion is provided on the pressure cover 71, and the protrusion extends into the shaft hole. This can facilitate the installation and positioning of the pressure cover 71, and when the elastic member 72 is installed on the protrusion, the clamping structure 7 can exert a better force on the sealing ring 3.

[0051] Preferably, there are two elastic members 72, and two mounting grooves are constructed on the protrusion, one of which is located radially inside the other mounting groove, and the two elastic members 72 are installed in the two mounting grooves respectively. That is, the two elastic members 72 are nested and arranged at intervals along the radial direction, so that the clamping structure 7 can form two inner and outer circles of elastic extrusion on the sealing ring 3, so that the clamping structure 7 can apply force to the sealing ring 3 more evenly. Furthermore, along the axial direction of the rotating shaft 1, with the stop ring surface as the projection surface, the projection of the elastic member 72 on the radial inside is completely inside the stop ring surface, and its cooperation with the stop ring surface can ensure that the ring body 31 is tightly attached to the stop ring surface, thereby ensuring the sealing performance. The projection of the elastic member 72 on the radial outer side is inside the stop ring surface, and the remaining part is outside the stop ring surface. The installation position of the elastic member 72 is set in this way so that part of it does not cooperate with the stop ring surface to squeeze the ring body 31, thereby ensuring that when the ring body 31 is in close contact with the stop ring surface, the pressure between the ring body 31 and the stop ring surface will not be too large, thereby reducing the mechanical wear between the ring body 31 and the stop ring surface. Preferably, half of the projection of the elastic member 72 on the radial outer side is inside the stop ring surface, and the other half is outside the stop ring surface.

[0052] As a specific implementation, the elastic member 72 is a wave spring pad. The wave spring pad has a wavy shape and is a standard part. In particular, the open wave spring pad has high toughness and strength, and is suitable for small deformation and low and medium forces. Moreover, the wave spring pad has been widely verified in the industry and has high reliability. Therefore, the elastic member 72 of the present application is preferably a wave spring pad. The material of the wave spring pad is generally 65Mn.

[0053] Finally, it should be noted that the motor also includes a bearing 8, a bearing steel sleeve 9 and a bearing baffle 10. The end cover 2 has a bearing chamber. The bearing 8 and the bearing baffle 10 are both mounted on the rotating shaft 1, and the bearing 8 is also in the bearing chamber of the end cover 2. The bearing steel sleeve 9 is installed in the bearing chamber, and the bearing steel sleeve 9 is radially outward of the bearing 8. The bearing baffle 10 is tightly attached to the side of the end cover 2 away from the pressure cover 71. Among them, the bearing steel sleeve 9 is used to form a better load on the bearing 8, and the bearing baffle 10 is used to limit the bearing 8 and the bearing steel sleeve 9 so as to better fix the two.

[0054] The utility model also provides a vehicle, comprising the aforementioned motor. The vehicle of the utility model particularly refers to a new energy vehicle.

[0055] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0056] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above are only preferred implementations of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A motor, characterized in that: The invention comprises a rotating shaft (1), an end cover (2), a sealing ring (3) and a clamping structure (7), wherein the rotating shaft (1) is provided with a first stop structure (4), the first stop structure (4) having a stop ring surface surrounding the rotating shaft (1), the end cover (2) being provided with an axial hole, the rotating shaft (1) being inserted into the axial hole, and a first annular gap being formed between the rotating shaft (1) and the hole wall of the axial hole, the sealing ring (3) being arranged in the first annular gap and being sleeved outside the rotating shaft (1), a second annular gap being formed between the inner ring surface of the sealing ring (3) and the rotating shaft (1), the sealing ring (3) being sealingly connected to the hole wall of the axial hole, the first end face of the sealing ring (3) forming a surface contact with the stop ring surface, and the clamping structure (7) being used to apply force to the sealing ring (3) so that the sealing ring (3) and the stop ring surface are always in a surface contact state.

2. The motor according to claim 1, characterized in that The sealing ring (3) comprises a ring body (31) and a sealing ring (32) sleeved on the ring body (31); the ring body (31) is sleeved outside the rotating shaft (1); a second annular gap is provided between the inner annular surface of the ring body (31) and the rotating shaft (1); a third annular gap is provided between the outer annular surface of the ring body (31) and the hole wall of the shaft hole; a first end surface of the ring body (31) forms surface contact with the stop ring surface; and the sealing ring (32) is sealingly connected to the hole wall of the shaft hole.

3. The motor according to claim 2, characterized in that The ring body (31) is made of conductive material.

4. The motor according to any one of claims 1 to 3, characterized in that: The end cover (2) has a second stop structure (6), the second stop structure (6) is located on the extension path of the shaft hole, and the sealing ring (3) is clamped between the first stop structure (4) and the second stop structure (6).

5. The motor according to claim 4, characterized in that The second stop structure (6) surrounds the shaft hole.

6. The motor according to claim 1, characterized in that The clamping structure (7) is mounted on the end cover (2), the clamping structure (7) abuts against the second end surface of the sealing ring (3), and there is elastic extrusion between the clamping structure (7) and the sealing ring (3).

7. The motor according to claim 6, characterized in that The clamping structure (7) comprises a pressure cover (71) and an elastic member (72) mounted on the pressure cover (71); the pressure cover (71) is mounted on the end cover (2); and the elastic member (72) abuts against the second end surface of the sealing ring (3).

8. The motor according to claim 7, characterized in that The number of the elastic members (72) is two, and the two elastic members (72) are arranged at intervals on the pressure cover (71). Along the axial direction of the rotating shaft (1), with the stop ring surface as the projection surface, the projection of one of the elastic members (72) is completely within the stop ring surface, and the projection part of the other elastic member (72) is within the stop ring surface, and the remaining part is outside the stop ring surface.

9. The motor according to claim 7, characterized in that The elastic member (72) is a wave spring pad.

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

Images