Connecting and sealing structure of cooling pipe and rear end cover in motor

Abstract

The utility model provides a connecting and sealing structure of a cooling pipe and a rear end cover in a motor, and belongs to the technical field of motors. According to the utility model, the rear end cover comprises a body, the body is provided with a through hole for the cooling pipe to pass through, the connection sealing structure comprises a concave cavity formed at the rear side of the body and a cover plate fixed at the rear side of the body and used for sealing the opening of the concave cavity, and the cover plate is provided with a mounting hole for the cooling pipe to pass through in a penetrating manner; a cylindrical rubber part is arranged in the concave cavity, the cooling pipe is sleeved with the rubber part, the rear end of the rubber part penetrates through the mounting hole, and the inner walls of the two ends of the rubber part are in contact sealing with the outer wall of the cooling pipe; an annular groove is formed in the outer wall of the middle of the rubber part, the axial section of the annular groove is roughly in a U shape, and the edge of the mounting hole is clamped in the annular groove. The connecting and sealing structure of the cooling pipe and the rear end cover in the motor can enhance the sealing performance.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors and relates to a motor, in particular to a connection sealing structure between a motor cooling pipe and a rear end cover. Background Art

[0002] An oil-cooled motor, also known as an oil-cooled permanent magnet synchronous motor, is a motor that dissipates heat by transferring the heat inside the motor to the oil medium.

[0003] Existing oil-cooled motors are generally divided into integral oil-immersed type, oil-sprayed type and oil-passing type. Among them, the integral oil-immersed type is a liquid-cooled motor disclosed in the China Patent Library (application number: 201310112804.6), which includes a motor housing, a stator core, a stator winding coil, a rotor, a rotating shaft, a front cover, a rear cover, a pump, a radiator, an infusion tube, a liquid storage tank, and a bearing; each side of the stator core has a sealing cover, which are a first sealing cover and a second sealing cover respectively. The first sealing cover and the second sealing cover are annular structures, and the outer ring end of the annular structure is fixed on the inner wall of the motor housing, and the inner ring end of the annular structure is fixed on the side of the stator core. The first sealing cover, the inner wall of the motor housing, and the stator are The sides of the iron core together form a closed space; the second sealing cover, the inner wall of the motor housing, and the side of the stator iron core together form a closed space; the two side ends of the stator winding coil are respectively placed in two closed spaces formed by the two sealing covers and the motor housing and the side of the stator iron core; the two sealing covers are connected through a plurality of grooves or infusion pipes on the outer ring wall of the stator iron core or the inner wall of the motor housing; the first sealing cover, the second sealing cover, the motor housing, the infusion pipe, the radiator, the pump, and the liquid storage tank form a liquid circulation circuit, the motor housing has a plurality of connecting holes, the first sealing cover and the second sealing cover are connected to the infusion pipe and the liquid storage tank through the connecting holes, and thus connected to the liquid circulation circuit.

[0004] In the above-mentioned liquid-cooled motor, the liquid delivery pipe and the motor housing are generally sealed with a sealing ring, and the sealing ring is pressed in. In actual use, the cooling oil entering the motor housing carries a certain pressure. When the sealing ring is not pressed into place or the deformation is too large, it is easy to cause leakage under the impact of the cooling oil, affecting the use. Utility Model Content

[0005] The utility model aims to solve the above problems in the prior art and proposes a connection sealing structure between a cooling pipe and a rear end cover in a motor with good sealing effect.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a connection sealing structure between a cooling pipe and a rear end cover in an electric motor, the rear end cover includes a body, and the body is provided with a through hole for the cooling pipe to pass through, characterized in that the connection sealing structure includes a concave cavity formed on the rear side of the body and a cover plate fixed on the rear side of the body and closing the cavity opening of the concave cavity, the concave cavity and the body are coaxially arranged, and a mounting hole for the cooling pipe to pass through is penetrated on the cover plate; a cylindrical rubber piece is provided in the concave cavity, the rubber piece is sleeved on the cooling pipe, the rear end of the rubber piece passes through the mounting hole, and the inner walls at both ends of the rubber piece are in contact and sealed with the outer wall of the cooling pipe; an annular groove coaxial with the rubber piece is opened on the outer wall of the middle part of the rubber piece, the axial cross-section of the annular groove is roughly U-shaped, and the edge of the mounting hole is clamped in the annular groove.

[0007] The rubber member used to form a seal between the cooling pipe and the rear end cover is arranged on the cover plate, and the cover plate is arranged on the rear side of the main body, so that the main body forms a blocking barrier on the front side of the cover plate to reduce the impact of the cooling oil on the rubber member; at the same time, the rubber member is clamped in the annular groove through the edge of the mounting hole for positioning, so that under the impact of the cooling oil, the rubber member will be closer to the front side of the cover plate to form a more effective seal, thereby greatly enhancing the sealing performance formed between the cooling pipe and the rear end cover to ensure the stable operation of the motor.

[0008] In the connection sealing structure between the cooling tube and the rear end cover in the above-mentioned electric motor, the above-mentioned annular groove includes a front side wall and a rear side wall distributed along the axial direction of the rubber member, the front side wall and the rear side wall are both annular, and the outer diameter of the rear side wall is smaller than the outer diameter of the front side wall, so as to effectively increase the contact area between the rubber member and the rear side surface of the cover plate, so that a more stable seal is formed between the cooling tube and the rear end cover.

[0009] In the above-mentioned connection sealing structure between the cooling pipe and the rear end cover of the motor, the axial cross section of the front outer side surface of the rubber piece is a concave arc shape, so that the front end of the rubber piece can pass through the installation hole more easily, which is convenient for installation.

[0010] In the connection sealing structure between the cooling tube and the rear end cover in the above-mentioned electric motor, an annular sealing portion is formed on the outer side surface of the rear end of the rubber member, the sealing portion is coaxially arranged with the rubber member, and the sealing portion is pressed on the rear side surface of the cover plate to further increase the contact area between the rubber member and the cover plate to improve the sealing performance.

[0011] In the above-mentioned connection sealing structure between the cooling pipe and the rear end cover of the motor, the axial cross section of the sealing portion is roughly L-shaped, which is convenient for installing the rubber part.

[0012] In the connection sealing structure between the cooling tube and the rear end cover of the above-mentioned motor, the cover plate is pressed tightly against the edge of the concave cavity, and an annular mounting groove is opened at the edge of the concave cavity. A sealing ring is arranged in the mounting groove, and the two end surfaces of the sealing ring are respectively in contact and sealed with the rear side surface of the cover plate and the bottom surface of the mounting groove, so that a reliable seal is formed between the cover plate and the body, and the concave cavity opening is stably sealed.

[0013] In the above-mentioned sealing structure for connecting the cooling pipe and the rear end cover of the motor, the cover is fixedly connected to the body by a circle of screws, the screw axis extends forward and backward, and the screw is located inside the sealing ring. The above-mentioned design facilitates the installation and positioning of the cover.

[0014] In the above-mentioned connection sealing structure between the cooling pipe and the rear end cover of the motor, a plurality of convex columns are formed on the bottom wall of the cavity, the axis of the convex columns extends forward and backward, and the rear end of the convex columns presses on the front side of the cover plate. The convex columns are provided to support the cover plate forward so that the cover plate is more stably positioned.

[0015] In the connection sealing structure between the cooling tube and the rear end cover in the above-mentioned motor, the boss is hollow, and the front end of the boss is closed and the rear end is open, so as to reduce the weight of the rear end cover.

[0016] Compared with the prior art, the connection sealing structure between the cooling pipe and the rear end cover in the motor has the following advantages:

[0017] 1. The rubber member used to form a seal between the cooling pipe and the rear end cover is arranged on the cover plate, and the cover plate is arranged on the rear side of the body, so that the body forms a blocking barrier on the front side of the cover plate to reduce the impact of the cooling oil on the rubber member; at the same time, the rubber member is clamped in the annular groove through the edge of the mounting hole for positioning, so that under the impact of the cooling oil, the rubber member will be closer to the front side of the cover plate to form a more effective seal, thereby greatly enhancing the sealing performance formed between the cooling pipe and the rear end cover to ensure the stable operation of the motor.

[0018] 2. The outer diameter of the rear side wall is larger than that of the front side wall, so as to effectively increase the contact area between the rubber part and the rear side of the cover plate, so as to form a more stable seal between the cooling pipe and the rear end cover.

[0019] 3. A convex column is provided to support the cover plate forward so that the cover plate is positioned more stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of the connection between the cooling pipe and the rear end cover.

[0021] Figure 2 It is a cross-sectional schematic diagram of the connection between the cooling pipe and the rear end cover.

[0022] Figure 3 yes Figure 2 A magnified schematic diagram of center A.

[0023] Figure 4 It is a cross-sectional schematic diagram of a rubber part.

[0024] In the figure, 1, main body; 1a, concave cavity; 1b, convex column; 2, cover plate; 3, rubber part; 3a, annular groove; 3a1, front side wall; 3b, sealing part; 4, sealing ring; 5, screw; 6, cooling pipe. Detailed implementation manners

[0025] The following are specific embodiments of the present utility model and, in combination with the accompanying drawings, further describe the technical solutions of the present utility model, but the present utility model is not limited to these embodiments.

[0026] In the connection and sealing structure between the cooling pipe and the rear end cover in the motor,

[0027] The rear end cover includes a body 1, and a through hole for the cooling pipe 6 to pass through is provided on the body 1, and the axis of the through hole extends forward and backward.

[0028] As Figure 1 and Figure 2 shown, the connection and sealing structure between the cooling pipe and the rear end cover in this motor includes a concave cavity 1a formed on the rear side of the body 1 and a cover plate 2 fixed on the rear side of the body 1 and closing the orifice of the concave cavity 1a. Among them, the concave cavity 1a and the body 1 are coaxially arranged; a mounting hole for the cooling pipe 6 to pass through is provided through the cover plate 2, and the axis of the mounting hole extends forward and backward.

[0029] As Figures 2 to 4 shown, a cylindrical rubber part 3 is provided in the concave cavity 1a. The rubber part 3 is sleeved on the cooling pipe 6. The rear end of the rubber part 3 passes through the mounting hole, and the inner walls of both ends of the rubber part 3 are in contact and sealed with the outer wall of the cooling pipe 6. An annular groove 3a coaxial with the rubber part 3 is formed on the outer wall of the middle part of the rubber part 3. The axial section of the annular groove 3a is substantially in a U shape. The annular groove 3a includes a front side wall 3a1 and a rear side wall distributed along the axis of the rubber part 3, and both the front side wall 3a1 and the rear side wall are annular. The edge of the mounting hole is clamped in the annular groove 3a. That is, at this time, the front side wall 3a1 and the rear side wall are respectively in close contact with the front side and the rear side of the cover plate 2, so that the rubber part 3 and the cover plate 2 are stably connected together.

[0030] The rubber part 3 for forming a seal between the cooling pipe 6 and the rear end cover is arranged on the cover plate 2, and the cover plate 2 is arranged on the rear side of the body 1, so that the body 1 forms a blocking barrier on the front side of the cover plate 2 to reduce the impact of the cooling oil on the rubber part 3; at the same time, the rubber part 3 is positioned by clamping the edge of the mounting hole in the annular groove 3a, so that the rubber part 3 will be more closely attached to the front side of the cover plate 2 under the impact of the cooling oil, forming a more effective seal, thereby greatly strengthening the sealing performance formed between the cooling pipe 6 and the rear end cover and ensuring the stable operation of the motor.

[0031] Preferably, the outer diameter of the rear side wall is smaller than the outer diameter of the front side wall 3a1 to effectively increase the contact area between the rubber part 3 and the rear side of the cover plate 2, so as to form a more stable seal between the cooling pipe 6 and the rear end cover. The axial section of the front outer side of the rubber part 3 is a concave circular arc, so that the front end of the rubber part 3 is more easily passed through the mounting hole, facilitating installation.

[0032] Furthermore, an annular sealing portion 3b is formed on the outer side surface of the rear end of the rubber member 3, and the sealing portion 3b is coaxially arranged with the rubber member 3, and the sealing portion 3b is pressed on the rear side surface of the cover plate 2 to further increase the contact area between the rubber member 3 and the cover plate 2 to improve the sealing performance. Preferably, the axial cross-section of the sealing portion 3b is roughly L-shaped to facilitate the installation of the rubber member 3.

[0033] In this embodiment,

[0034] like Figure 2 and Figure 3 As shown, the connection method of the cover plate 2 and the body 1 is as follows: the cover plate 2 is pressed tightly against the edge of the concave cavity 1a, and a ring-shaped mounting groove is provided on the edge of the concave cavity 1a, and the mounting groove and the cover plate 2 are coaxially arranged. A sealing ring 4 is provided in the mounting groove, and the two end faces of the sealing ring 4 are respectively in contact and sealed with the rear side of the cover plate 2 and the bottom surface of the mounting groove, so that a reliable seal is formed between the cover plate 2 and the body 1, and the cavity opening of the concave cavity 1a is stably sealed. In the actual product, the cover plate 2 is fixedly connected to the body 1 by a circle of screws 5, the axis of the screws 5 extends forward and backward, and the screws 5 are on the inner side of the sealing ring 4. The above design facilitates the installation and positioning of the cover plate 2.

[0035] Further explanation, a convex column 1b is formed on the bottom wall of the cavity 1a, and the convex column 1b and the body 1 are an integrated structure. There are multiple convex columns 1b, the axis of the convex column 1b extends forward and backward, and the rear end of the convex column 1b presses on the front side of the cover plate 2. The convex column 1b is provided to support the cover plate 2 forward so that the cover plate 2 is more stably positioned. Preferably, the convex column 1b is hollow, and the front end of the convex column 1b is closed and the rear end is open to reduce the weight of the rear end cover.

[0036] The specific embodiments described herein are merely examples of the spirit of the present invention. A person skilled in the art of the present invention may make various modifications or additions to the specific embodiments described or replace them in a similar manner, but this will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A connection sealing structure between a cooling pipe and a rear end cover in an electric motor, the rear end cover comprising a body (1), and the body (1) is provided with a through hole for the cooling pipe (6) to pass through, characterized in that: The connection sealing structure comprises a concave cavity (1a) formed on the rear side of a body (1) and a cover plate (2) fixed on the rear side of the body (1) and sealing the cavity opening of the concave cavity (1a); the concave cavity (1a) and the body (1) are coaxially arranged, and a mounting hole for a cooling pipe (6) to pass through is penetrated through the cover plate (2); a cylindrical rubber member (3) is arranged in the concave cavity (1a), the rubber member (3) is sleeved on the cooling pipe (6), the rear end of the rubber member (3) passes through the mounting hole, and the inner walls of both ends of the rubber member (3) are in contact and sealed with the outer wall of the cooling pipe (6); an annular groove (3a) coaxial with the rubber member (3) is opened on the outer wall of the middle part of the rubber member (3), the axial cross section of the annular groove (3a) is roughly in the shape of a U, and the edge of the mounting hole is clamped in the annular groove (3a).

2. The connection sealing structure between the cooling pipe and the rear end cover in the motor according to claim 1, characterized in that: The annular groove (3a) comprises a front side wall (3a1) and a rear side wall distributed along the axial direction of the rubber member (3); the front side wall (3a1) and the rear side wall are both annular, and the outer diameter of the rear side wall is smaller than the outer diameter of the front side wall (3a1).

3. The connection sealing structure between the cooling pipe and the rear end cover in the motor according to claim 2, characterized in that: The axial cross-section of the outer side surface of the front end of the rubber component (3) is in the shape of an inwardly concave arc.

4. The connection sealing structure between the cooling pipe and the rear end cover in the motor according to claim 1, 2 or 3, characterized in that: An annular sealing portion (3b) is formed on the outer side surface of the rear end of the rubber member (3); the sealing portion (3b) is coaxially arranged with the rubber member (3), and the sealing portion (3b) is pressed against the rear side surface of the cover plate (2).

5. The connection sealing structure between the cooling pipe and the rear end cover in the motor according to claim 4, characterized in that: The axial cross section of the sealing portion (3b) is substantially L-shaped.

6. The connection sealing structure between the cooling pipe and the rear end cover in the motor according to claim 1, characterized in that: The cover plate (2) is tightly pressed against the edge of the concave cavity (1a), and an annular mounting groove is provided on the edge of the concave cavity (1a). A sealing ring (4) is provided in the mounting groove, and both end surfaces of the sealing ring (4) are in contact and sealed with the rear side surface of the cover plate (2) and the bottom surface of the mounting groove respectively.

7. The connection sealing structure between the cooling pipe and the rear end cover in the motor according to claim 6, characterized in that: The cover plate (2) is fixedly connected to the body (1) via a circle of screws (5), the axis of the screws (5) extending forward and backward, and the screws (5) are located inside the sealing ring (4).

8. The connection sealing structure between the cooling pipe and the rear end cover in the motor according to claim 6 or 7, characterized in that: A convex column (1b) is formed on the bottom wall of the concave cavity (1a), there are a plurality of convex columns (1b), the axis of the convex column (1b) extends forward and backward, and the rear end of the convex column (1b) is pressed on the front side of the cover plate (2).

9. The connection sealing structure between the cooling pipe and the rear end cover in the motor according to claim 8, characterized in that: The convex column (1b) is hollow, and the front end of the convex column (1b) is closed and the rear end is open.

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