Motor end cover structure and motor

Abstract

The present invention relates to the field of motor technology, and specifically to a motor end cover structure and a motor, wherein the end cover structure comprises: an end cover body, which is suitable for installation in conjunction with a housing, and has a water storage chamber therein, wherein the water storage chamber is connected to a drainage chamber of the motor through a water inlet hole, so as to drain the water in the drainage chamber to the water storage chamber for storage, and to timely drain the accumulated water in the motor to prevent the motor from short-circuiting due to water inflow. The water storage chamber in the end cover body and the accumulated water in the water storage chamber can form an isolation and absorption effect on the transmission of motor noise, effectively reducing the motor noise, and at the same time, due to the large specific heat of water, the water stored in the water storage chamber can effectively absorb the heat of the end cover bearing chamber, cool the motor, and thus make the motor run more stably.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a motor end cover structure and a motor. Background Art

[0002] The drive motor of new energy vehicles is usually installed at the bottom of the vehicle body. The components inside the motor are sealed inside the motor through the end cover and the casing. The lead-out wiring harness of the motor is mainly concentrated at the rear end cover of the motor, and the motor end cover is sealed by an oil seal. When the car is running, the temperature of the motor will continue to change, so condensation water is easy to be generated inside the motor, such as in the junction box of the rear end cover. If the condensation water is not handled in time, it will cause a short circuit in the line and cause the motor to burn. At the same time, the operating environment of the car is complex, and the motor often works in harsh working conditions such as humid weather and road waterlogging, which affects the sealing of the motor, causing external water to enter the motor through the shaft end, affecting the life of the motor and even causing the motor to burn. Therefore, how to improve the waterproof level of the motor is one of the important research directions of new energy vehicles. Summary of the invention

[0003] In order to improve the waterproof performance of the existing motor, the present invention provides a motor end cover structure and a motor, a power assembly and a car having the end cover structure.

[0004] In a first aspect, the present invention provides a motor end cover structure, comprising:

[0005] The end cover body is suitable for installation in cooperation with the casing, and a water storage chamber is provided inside the end cover body. The water storage chamber is connected with the drainage chamber of the motor through a water inlet hole to drain the water in the drainage chamber into the water storage chamber for storage.

[0006] In some embodiments, the water storage cavity is a fan-shaped cavity opened around the axis of the end cover body.

[0007] In some embodiments, in the radial direction of the end cover body, the height of the water storage cavity is less than or equal to the height of the water inlet hole.

[0008] In some embodiments, the water storage cavity is provided with an openable and closable drainage hole at the bottom away from the water inlet hole.

[0009] In some embodiments, the motor end cover structure further includes:

[0010] The water inlet channel is arranged in the end cover body, one end of which is connected to the water storage cavity, and the other end of which is connected to the water inlet hole.

[0011] In some embodiments, a check structure is provided between the water storage cavity and the water inlet hole.

[0012] In some embodiments, a junction box is provided at one radial end of the end cover body, the water inlet hole is connected to the junction box and is flush with the bottom of the junction box, and the water storage chamber is provided on a side of the end cover body away from the junction box.

[0013] In some embodiments, a connection between the water inlet channel and the water inlet has a corner structure to form the non-return structure.

[0014] In some embodiments, in the axial direction of the end cover body, the water inlet hole is located at a position where the junction box is connected to the side wall of the end cover body, the water inlet hole is perpendicular to the bottom wall of the junction box, and the water inlet channel is an arc shape concentric with the end cover body.

[0015] In some embodiments, a bearing chamber for mounting a bearing is provided in the middle of one axial side of the end cover body, and the water inlet hole is connected to the radial bottom of the bearing chamber and is located at a position where the bearing chamber is connected to the side wall of the end cover body.

[0016] In some embodiments, in the axial direction of the end cover body, the connection between the water inlet channel and the water storage chamber has a corner structure to form the non-return structure.

[0017] In some embodiments, the end surface of the end cover body is provided with a plurality of reinforcing ribs.

[0018] In a second aspect, the present invention provides a motor, comprising:

[0019] chassis;

[0020] The motor end cover structure mentioned above; and

[0021] A stator and rotor assembly is arranged in the casing.

[0022] In a third aspect, the present invention provides a power assembly including the above-mentioned motor.

[0023] In a fourth aspect, the present invention provides a vehicle comprising the above-mentioned powertrain.

[0024] The technical solution of the present invention has the following beneficial effects:

[0025] 1) The motor end cover structure provided by the present invention includes an end cover body, which is installed in cooperation with the motor housing, and has a water storage chamber inside. The water storage chamber has a water inlet hole, which is connected to the drainage chamber in the motor, so that the accumulated water in the drainage chamber of the motor is drained through the water inlet hole to the water storage chamber for storage, and the accumulated water in the motor is discharged in time to prevent the motor from short-circuiting due to water inflow. The water storage chamber in the end cover body and the accumulated water in the water storage chamber can form a partition and absorption effect on the transmission of motor noise, effectively reducing the motor noise. At the same time, due to the large specific heat of water, the water stored in the water storage chamber can effectively absorb the heat of the end cover bearing chamber and cool the motor, thereby making the motor run more stably.

[0026] 2) The motor end cover structure provided by the present invention has a water storage cavity which is a fan-shaped cavity opened around the axis of the end cover body. Since the motor generates a lot of heat at the end cover shaft hole when it is working, the sealing performance of the end cover shaft hole will be affected in a high temperature environment, causing water to easily enter the shaft hole. Therefore, the water in the water storage cavity cools the end cover shaft hole, reduces the temperature at the shaft hole, and further improves the sealing effect. In addition, the fan-shaped water storage cavity has a larger cross-sectional area, and has better cooling and noise reduction effects.

[0027] 3) The motor end cover structure provided by the present invention has a water storage chamber with a height less than or equal to a height of a water inlet hole in the radial direction of the end cover body, so as to prevent water in the water storage chamber from flowing back into the motor. An openable and closable drainage hole is provided at the bottom of the water storage chamber away from the water inlet hole. When there is too much water in the water storage chamber, the accumulated water can be discharged through the drainage hole.

[0028] 4) The motor end cover structure provided by the present invention has a check structure between the water storage chamber and the water inlet hole. The check structure condenses and refluxes the water vapor generated by the water in the water storage chamber to prevent the accumulated water in the water storage chamber from entering the interior of the motor.

[0029] 5) The motor end cover structure provided by the present invention has a junction box at one radial end of the end cover body, a water inlet hole connected to the junction box and flush with the bottom of the junction box, and a water storage chamber arranged on a side of the end cover body away from the junction box, thereby draining the accumulated water in the junction box to avoid short circuit due to moisture.

[0030] 6) The motor end cover structure provided by the present invention has a bearing chamber for installing a bearing in the middle of one axial side of the end cover body, and the water inlet hole is connected to the radial bottom of the bearing chamber and is located at the position where the bearing chamber is connected to the side wall of the end cover body, so as to drain the end cover shaft hole position, and the external accumulated water entering through the shaft hole is discharged at the end cover position, thereby preventing the accumulated water from entering the interior of the motor and improving the waterproof ability of the motor.

[0031] 7) In the motor end cover structure provided by the present invention, a plurality of reinforcing ribs are arranged on the end surface of the end cover body, and reinforcing ribs are arranged on the outer end surface on the basis of arranging a water storage cavity inside, so as to improve the strength of the end cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 It is a front view of the end cover structure according to one embodiment of the present invention.

[0034] Figure 2 is a cross-sectional view of an end cover structure according to an embodiment of the present invention.

[0035] Figure 3 It is a front view of an end cover structure according to another embodiment of the present invention.

[0036] Figure 4 is a cross-sectional view of an end cover structure according to another embodiment of the present invention.

[0037] Figure 5 is a side cross-sectional view of an end cover structure according to another embodiment of the present invention.

[0038] Description of reference numerals:

[0039] 10-end cover body; 11-reinforcement rib; 20-junction box; 31-water storage cavity; 32-water inlet channel; 33-water inlet hole; 34-drainage hole; 40-bearing chamber. DETAILED DESCRIPTION

[0040] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described implementation is a partial embodiment of the present invention, rather than all implementations. Based on the implementations in the present invention, all other implementations obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention. In addition, the technical features involved in the different implementations of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0041] The end cover structure provided by the present invention can be used to cooperate with the casing to seal the shaft end and drain the casing. For example, for a motor, the end cover and the motor casing are sealed by a stopper, and the stopper structure can be adopted from the existing technology, which will not be described in detail here.

[0042] It should be noted that the drive motor in the prior art includes a housing, a front cover, a rear cover, and a stator and rotor assembly arranged in the housing. The water ingress into the motor mainly includes two aspects: one is that the water outside the motor penetrates into the inside of the motor, and the other is the internal condensation water generated by the temperature change of the motor during operation. For automobile drive motors, the wiring harness of the motor is mainly concentrated at the junction box of the rear cover. Since the junction box has many wiring harness lead holes and the sealing performance is limited, the external water can easily enter the junction box. At the same time, due to the large temperature change when the motor is working, condensation water is also easily generated in the junction box. The long-term presence of these accumulated water in the junction box will cause the wiring harness to short-circuit. On the other hand, the continuous rotation of the motor spindle will also affect the sealing of the motor shaft extension end. When the spindle rotates, the temperature at the end cover bearing chamber increases, and the sealing between the bearing and the end cover is affected. Therefore, the external accumulated water can easily enter the motor through the shaft hole. In order to solve the problem of water ingress, the motor in the prior art adopts a drain port at the bottom of the motor that is connected to the outside world, so as to discharge the water inside the motor. However, this structure is not suitable for harsh working conditions, such as when the motor is soaked in water, and the external accumulated water is easy to enter the motor through the drain port. At the same time, if water enters the outside of the motor and then is discharged, it will cause the stator and rotor inside the motor to become damp, causing motor failure.

[0043] In view of this, the present invention provides a novel motor end cover structure, including an end cover body, which is installed in cooperation with the motor casing, and has a water storage chamber therein, wherein the water storage chamber has a water inlet hole, and the water inlet hole is connected to the chamber to be drained in the motor (such as a junction box, a bearing chamber, etc.), so that the accumulated water in the chamber to be drained from the motor is drained through the water inlet hole to the water storage chamber for storage, and the end cover structure is used to timely drain the accumulated water in the motor to prevent the accumulated water from entering the motor. The water storage chamber in the end cover body and the accumulated water in the water storage chamber can form an isolation and absorption effect on the transmission of motor noise, effectively reducing the motor noise. At the same time, due to the large specific heat of water, the water stored in the water storage chamber can effectively absorb the heat of the end cover bearing chamber to cool the motor, thereby making the motor run more stably. For example Figure 1 , Figure 2 Detailed description of the invention is given in FIG.

[0044] like Figure 1 , Figure 2 As shown, in the present embodiment, the end cover is the rear end cover of the motor, and the rear end cover structure includes an end cover body 10, and the end cover body 10 is provided with structures such as connecting lugs and stoppers for connecting and cooperating with the rear end face of the casing. The connection method can be the method in the prior art, which will not be repeated here. A junction box 20 is provided at the radial upper end of the outer end face of the end cover body 10. The junction box 20 is used to lead out the wiring harness in the motor, so a plurality of wiring harness interfaces are provided on the end face of the end cover body 10 in the junction box 20. A water storage chamber 31 is provided inside the end cover body 10, and the water storage chamber 31 is provided on the side of the end cover body 10 away from the junction box 20. As shown Figure 1 , Figure 2 As shown, in this embodiment, the water storage cavity 31 is a fan-shaped cavity opened around the bearing chamber position of the end cover body 10. Since the end cover structure is roughly annular, the cavity of the fan-shaped structure can maximize the volume and cross-sectional area of ​​the water storage cavity 31. The water storage cavity 31 is connected to the junction box 20 through the water inlet channel 32 and the water inlet hole 33. Figure 2 As shown, the water inlet hole 33 is provided at the bottom position where the junction box 20 is connected to the side wall of the end cover body. At the same time, in order to ensure that the accumulated water in the junction box 20 can flow out smoothly, the height of the water inlet hole 33 is set not higher than the inner wall surface of the bottom of the junction box 20, and the water inlet hole 33 extends perpendicular to the bottom wall of the junction box 20 to a position close to the bearing chamber. One end of the water inlet channel 32 is connected to the water inlet hole 33, and the other end is connected to the water storage chamber 31. In this embodiment, the water inlet channel 32 is an arc shape concentric with the end cover body 10, so that the connection position of the water inlet hole 33 and the water inlet channel 32 forms a corner structure, and the corner structure forms a check structure.

[0045] In this embodiment, along the radial direction of the end cover body 10, the height of the water storage chamber 31 is less than the height of the water inlet hole 33, that is, in the height direction, the water inlet hole 33 is higher than the water storage chamber 31, so that the water accumulated inside the junction box 20 is drained along the water inlet hole 33 and the water inlet channel 32 to the water storage chamber 31 for storage. A drainage hole 34 is provided at the bottom of the outer end surface of the end cover body 10, and the drainage hole 34 is in a normally closed state. When too much water accumulates in the water storage chamber 31, the water stored in the water storage chamber 31 can be discharged by opening the drainage hole 34. In this embodiment, in order to enhance the strength of the end cover, a plurality of annular reinforcing ribs 11 are formed on the outer end surface of the end cover body 10.

[0046] When the end cover structure of this embodiment is working, the condensed water generated by the temperature change of the motor inside the junction box 20 and the accumulated water entering the junction box 20 from the outside are drained into the water storage chamber 31 through the water inlet hole 33 and the water inlet channel 32 for storage. The water storage chamber 31 is a fan-shaped structure, which can maximize the volume of the water storage chamber 31 while ensuring the strength of the end cover. The water inlet channel 32 is a slender channel, and a corner structure is set between the water inlet channel 32 and the water inlet hole 33, which can condense the water vapor formed in the water inlet channel 32 and cause it to flow back into the water storage chamber 31, preventing the accumulated water in the water storage chamber 31 from returning to the junction box 20 for the second time. At the same time, the cavity structure of the water storage chamber 31 and the water stored in the water storage chamber 31 can form a blocking and absorbing effect on the noise transmission when the motor is running, effectively reducing the noise of the motor. The water storage chamber 31 and the water inlet channel 32 arranged around the bearing chamber can also cool the end cover and the bearing chamber, improve the sealing performance at the shaft hole, and make the motor run more reliable. When there is too much water stored in the water storage chamber 31, the water in the water storage chamber 31 can be discharged by opening the drain hole 34 to prevent the water from flowing back to the junction box 20. Since the drain hole 34 is in a normally closed state, even if the motor is soaked in water or other severe working conditions occur, the accumulated water will not enter the motor, thereby improving the waterproof level of the motor.

[0047] Figures 3 to 5 A second embodiment of the motor end cover structure according to the present invention is shown.

[0048] like Figures 3 to 5 As shown, in this embodiment, the end cover is the front end cover of the motor, and the front end cover structure includes an end cover body 10, and the end cover body 10 is provided with connecting lugs and stoppers and other structures for connecting and cooperating with the front end surface of the casing. The connection method can be adopted in the prior art, which will not be repeated here. A bearing chamber 40 for installing a bearing is provided in the middle of the inner end surface of the end cover body 10, and the water inlet hole 33 is connected to the radial bottom of the bearing chamber 40, and is located at the position where the bearing chamber 40 is connected to the side wall of the end cover body 10, that is, the water inlet hole 33 is provided at the bottom of the bearing chamber 40, so as to ensure that the accumulated water entering the bearing chamber 40 can flow out smoothly. The water storage chamber 31 is connected to the water inlet hole 33 through the water inlet channel 32. The water storage chamber 31 is provided on the lower side of the end cover body 10, and in the radial direction of the end cover body 10, the height of the water storage chamber 31 is not higher than the height of the water inlet hole 33. In this embodiment, the water storage cavity 31 is a fan-shaped cavity opened around the bearing chamber 40 of the end cover body 10. Since the end cover structure is roughly annular, the cavity of the fan-shaped structure can maximize the volume and cross-sectional area of ​​the water storage cavity 31. Figure 5As shown, in the present embodiment, the water inlet channel 32 is a vertical channel structure. In the axial direction of the end cover body 10, the connection between the water inlet channel 32 and the water storage chamber 31 has a corner structure, that is, the water inlet channel 32 and the water storage chamber 31 are not located in the same plane, and the corner structure forms a check structure. In the present embodiment, a drainage hole 34 is provided at the bottom position of the outer end surface of the end cover body 10. The drainage hole 34 is in a normally closed state. When too much water accumulates in the water storage chamber 31, the water stored in the water storage chamber 31 can be discharged by opening the drainage hole 34. In the present embodiment, in order to enhance the strength of the end cover, a plurality of annular reinforcing ribs 11 are formed on the outer end surface of the end cover body 10. In the present embodiment, the unmentioned structure can be the same as the above-mentioned embodiment, and its corresponding effect in the present embodiment should also be the same, which will not be repeated here.

[0049] When the end cover structure of this embodiment is working, the front end cover can be assembled, the main shaft is installed with the end cover body 10 through the bearing, and the bearing seal is installed in the bearing chamber 40. When the motor is working, the external accumulated water penetrates into the bearing chamber 40 through the shaft hole, and the accumulated water entering the bearing chamber 40 is drained into the water storage chamber 31 through the water inlet hole 33 and the water inlet channel 32 for storage. It should be noted that in this embodiment, the accumulated water outside the motor enters the bearing chamber and is directly discharged into the water storage chamber 31, and the accumulated water will not enter the interior of the motor. Compared with the structure of setting a drain port in the inner cavity of the motor in the prior art, the risk of moisture in the inner cavity of the motor is lower, and the motor operation is more stable. The water storage chamber 31 is a fan-shaped structure, which can maximize the volume of the water storage chamber 31 while ensuring the strength of the end cover. The water inlet channel 32 is a slender channel, and a corner structure is set between the water storage chamber 31, which can condense the water vapor formed in the water storage chamber 31 and force it to flow back into the water storage chamber 31, preventing the accumulated water in the water storage chamber 31 from returning to the bearing chamber 40 for the second time. At the same time, the cavity structure of the water storage chamber 31 and the water stored in the water storage chamber 31 can form a barrier and absorption effect on the noise transmission during the operation of the motor, effectively reducing the noise of the motor. The water storage chamber 31 and the water inlet channel 32 arranged around the bearing chamber can also cool the end cover and the bearing chamber, improve the sealing performance at the shaft hole, and make the motor run more reliable. When there is too much water stored in the water storage chamber 31, the accumulated water in the water storage chamber 31 can be discharged by opening the drain hole 34 to prevent the accumulated water from flowing back to the bearing chamber 40. Since the drainage hole 34 is in a normally closed state, even if the motor is immersed in water or other severe working conditions occur, the accumulated water will not enter the interior of the motor, thereby improving the waterproof level of the motor.

[0050] The above describes the specific structure and working principle of the end cover structure in the two embodiments of the present invention. Those skilled in the art should understand that the above embodiments are not used to limit the present invention. Based on the above disclosure, the present invention may also have other alternative embodiments.

[0051] In an alternative embodiment, a combination of the above two embodiments may be adopted, that is, two sets of drainage structures are provided on the same end cover, one drainage structure is used to drain the junction box, and the other drainage structure is used to drain the bearing chamber position, so as to further improve the waterproof effect, but the design difficulty and production cost are increased accordingly.

[0052] In another alternative embodiment, the shape of the water storage chamber is not limited to the fan-shaped ring disclosed above, but can also be any other suitable structure for implementation, and the present invention does not limit this. It should be noted that for the end cover structure, the fan-shaped water storage chamber has a larger volume and a better cooling effect on the end cover.

[0053] In another alternative embodiment, the check structure may also be provided in other forms, such as a one-way valve, a one-way membrane or other components that function as a check structure, and the present invention is not limited thereto.

[0054] In another alternative embodiment, the drainage cavity of the motor is not limited to the bearing chamber and the terminal box, and other motor cavities suitable for implementing the present invention are also acceptable, such as the inner cavity of the motor, etc. The present invention is not limited to this.

[0055] In a second aspect, the present invention further provides a motor, which includes a housing, the motor end cover structure described above, and a stator and rotor assembly disposed in the housing.

[0056] In a third aspect, the present invention further provides a power assembly, including the above-mentioned motor, which can be used in, for example, new energy vehicles, etc., so as to improve the waterproof ability of the motor of the new energy vehicle.

[0057] In a fourth aspect, the present invention further provides a car, comprising the above-mentioned power assembly, and the car may be, for example, a new energy car, etc., thereby improving the waterproof capability of the car motor.

[0058] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the embodiments. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A motor end cover structure, characterized in that: include: The end cover body (10) is suitable for being installed in cooperation with the housing, and has a water storage chamber (31) therein, wherein the water storage chamber (31) is connected with the drainage chamber of the motor through a water inlet hole (33) so as to drain the water in the drainage chamber to be stored in the water storage chamber (31), and the drainage chamber is formed in the junction box or the bearing chamber; A water inlet channel (32) is provided in the end cover body (10), one end of which is connected to the water storage chamber (31) and the other end of which is connected to the water inlet hole (33); A non-return structure is provided between the water storage chamber (31) and the water inlet hole (33), and a corner structure is provided at the connection between the water inlet channel (32) and the water inlet hole (33) to form the non-return structure.

2. The motor end cover structure according to claim 1, characterized in that: The water storage cavity (31) is a fan-shaped cavity opened around the axis of the end cover body (10).

3. The motor end cover structure according to claim 2, characterized in that: In the radial direction of the end cover body (10), the height of the water storage cavity (31) is less than or equal to the height of the water inlet hole (33).

4. The motor end cover structure according to claim 3, characterized in that: The water storage chamber (31) is provided with an openable and closable drainage hole (34) at the bottom away from the water inlet hole (33).

5. The motor end cover structure according to claim 1, characterized in that: A junction box (20) is provided at one radial end of the end cover body (10); the water inlet hole (33) is connected to the inside of the junction box (20) and is flush with the bottom of the junction box (20); and the water storage chamber (31) is provided on a side of the end cover body (10) away from the junction box (20).

6. The motor end cover structure according to claim 5, characterized in that: In the axial direction of the end cover body (10), the water inlet hole (33) is located at a position where the junction box (20) is connected to the side wall of the end cover body (10), the water inlet hole (33) is perpendicular to the bottom wall of the junction box (20), and the water inlet channel (32) is in the shape of an arc concentric with the end cover body (10).

7. The motor end cover structure according to claim 1, characterized in that: A bearing chamber (40) for mounting a bearing is provided in the middle of one axial side of the end cover body (10); the water inlet hole (33) is connected to the radial bottom of the bearing chamber (40) and is located at a position where the bearing chamber (40) is connected to the side wall of the end cover body (10).

8. The motor end cover structure according to claim 7, characterized in that: In the axial direction of the end cover body (10), the connection between the water inlet channel (32) and the water storage chamber (31) has a corner structure to form the non-return structure.

9. The motor end cover structure according to any one of claims 1 to 4, characterized in that: The end surface of the end cover body (10) is provided with a plurality of reinforcing ribs (11).

10. A motor, characterized in that: include: chassis; A motor end cover structure according to any one of claims 1 to 9; and a stator and rotor assembly arranged in the casing.

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