Motor end cover and motor

Abstract

The utility model discloses a motor end cover and a motor, the motor end cover is assembled on the end portion of a motor base of the motor, and the motor end cover comprises an end cover body and a first connecting portion arranged on the end cover body. The first connecting part comprises a thread part, a first mounting plate which is connected to one side, deviating from the engine base, of the thread part and extends to the outer side of the thread part along the circumferential direction of the end cover body, and a second mounting plate which axially extends at the end part in the extension direction of the first mounting plate to form a mounting groove with the first mounting plate; the protruding part is connected to the side, facing the motor base, of the threaded part and axially extends to form a first step face with the end face of the threaded part, the threaded part abuts against the motor base through the first step face, and connecting holes are formed in the positions, corresponding to the motor base, of the threaded part and used for allowing a connecting piece to be screwed in along the mounting groove and connecting the motor end cover and the motor base. According to the motor, the exposed fastener can be conveniently protected, for example, an anti-explosion coating is used, so that better sealing performance is provided, and the possibility that explosive gas enters the interior of the motor is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, especially a kind of motor end cover and motor. BACKGROUND

[0002] Explosion-proof motor is also called explosion-proof motor, it is a kind of motor with explosion-proof performance, mainly used in flammable and explosive places, can maximumly prevent the combustible gas and dust outside motor from entering into motor interior, to ensure that motor can safely run, the motor end cover of existing motor and base are usually bolt fastener, part of bolt fastener is in exposed state, seriously affect the sealing performance of motor.

[0003] Therefore, how to provide a kind of motor end cover and motor, can be convenient to the exposed fastener for protective treatment, to provide better sealing performance, reduce the possibility of explosive gas into motor interior, is the technical problem that present technical personnel in the field need to solve. INVENTION CONTENTS

[0004] The utility model aims at providing a kind of motor end cover and motor, can be convenient to the exposed fastener for protective treatment, to provide better sealing performance, reduce the possibility of explosive gas into motor interior.

[0005] To achieve the above-mentioned purpose, the utility model provides a kind of motor end cover, assembly in the base end portion of motor, motor end cover includes end cover body, first connecting portion setting in end cover body, first connecting portion includes threaded portion, first mounting plate connected in the side of threaded portion away from base and along the circumferential direction of end cover body extends to the outside of threaded portion, the second mounting plate that the end portion of first mounting plate extends in the direction of extension is axially extended to form mounting slot with first mounting plate, and the protruding portion connected to the side of threaded portion towards base and axially extended to form the first step surface with the end face of threaded portion, threaded portion is abutted to base by first step surface, threaded portion and base corresponding position are equipped with connecting hole, for along mounting slot screwing into and connecting motor end cover and base for connecting piece.

[0006] Preferably, motor end cover is also equipped with second connecting portion, and second connecting portion is used to connect the bearing inner cover of motor, and second connecting portion is equipped with the joint surface that can be mutually attached with bearing inner cover.

[0007] Preferably, joint surface is plane;Or,

[0008] The end face of second connecting portion towards bearing inner cover is equipped with the protrusion that axially extends to the outer periphery of bearing inner cover, and joint surface is second step surface.

[0009] Preferably, second connecting portion and bearing inner cover corresponding position are equipped with mounting hole, and fixed piece can be screwed into mounting hole along the side of second connecting portion away from bearing inner cover, to connect the second connecting portion and bearing inner cover that mutually attach.

[0010] Preferably, the side of the end cover body facing the bearing inner cover is provided with an extension body, the extension body is connected to the circumference of the second connecting portion, and a first blind hole extending to part of the second connecting portion is formed in the end face of the extension body away from the second connecting portion.

[0011] Preferably, the end cover body is further provided with a first channel, the first channel includes a radially extending first flow passage and an axially extending second flow passage, the first flow passage includes a first end on the circumferential face of the end cover body and a second end on the second connecting portion, the second flow passage includes a third end and a fourth end, the third end is communicated with the second end, and the fourth end is on the end face of the second connecting portion facing the bearing inner cover and is used for being communicated with the oil injection hole of the bearing inner cover.

[0012] Preferably, the circumferential face of the end cover body is further provided with a radially extending second blind hole.

[0013] Preferably, the first channel is two, and the included angle between the two first flow passages is 30-80°.

[0014] Preferably, the extension body is two, and the included angle between the two first blind holes and the central axis of the end cover body is 50-80°.

[0015] The application also provides an electric machine comprising the electric machine end cover.

[0016] With respect to the above background, the electric machine end cover provided by the application is assembled at the end of the machine base of the electric machine, and the electric machine end cover comprises an end cover body, a first connecting portion provided on the end cover body, the first connecting portion comprises a threaded portion, a first mounting plate connected to the side of the threaded portion away from the machine base and extending to the outside of the threaded portion along the circumference of the end cover body, a second mounting plate axially extending at the end of the first mounting plate in the extension direction of the first mounting plate to form a mounting groove with the first mounting plate, and a protruding portion connected to the side of the threaded portion facing the machine base and axially extending to form a first stepped face with the end face of the threaded portion, the threaded portion abuts the machine base through the first stepped face, and a connecting hole is arranged at the corresponding position of the threaded portion and the machine base, which is used for rotating the connecting member into the mounting groove to connect the electric machine end cover and the machine base.

[0017] Specifically, the first mounting plate is connected to the side of the threaded portion away from the machine base and extends to the outside of the threaded portion along the circumference of the end cover body to widen the first mounting plate, and the second mounting plate axially extends at the end of the first mounting plate in the extension direction of the first mounting plate to form a wider mounting groove with the first mounting plate, so that when the machine base is moved to the preset position of the first stepped face, the connecting member is rotated into the mounting groove to connect the electric machine end cover and the machine base, and the wider mounting groove can facilitate the protection of the exposed fasteners, for example, using an explosion-proof coating to provide better sealing performance and reduce the possibility of explosive gas entering the inside of the electric machine. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the provided drawings without creative labor.

[0019] Figure 1 The structural schematic view of the motor end cover provided by the embodiment of the present application is shown in the figure.

[0020] Figure 2 The structural schematic view of the motor end cover provided by the embodiment of the present application is shown in the figure.

[0021] Figure 3 The structural schematic view of the motor end cover provided by the embodiment of the present application is shown in the figure. Figure 1 The sectional view along A-A in the figure.

[0022] Figure 4 The sectional view along B-B in the figure. Figure 1

[0023] The structural schematic view of the motor end cover provided by the embodiment of the present application is shown in the figure. Figure 5

[0024] The structural schematic view of the motor end cover provided by the embodiment of the present application is shown in the figure. Figure 6

[0025] Among them:

[0026] 100-motor end cover, 110-end cover body, 120-first connecting part, 121-threaded part, 122-first mounting plate, 123-second mounting plate, 124-protruding part, 125-connecting hole, 130-second connecting part, 131-protrusion, 132-mounting hole, 140-extension body, 141-first blind hole, 150-first channel, 151-first flow channel, 152-second flow channel, 160-second blind hole;

[0027] 200-machine base;

[0028] 300-bearing inner cover;

[0029] 400-connecting piece;

[0030] 500-fixing piece. DETAILED DESCRIPTION

[0031] ​With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of the present application.

[0032] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0033] In the description of the present application, it should be understood that the positions or location relationships indicated by the terms "inner", "outer" and the like are based on the positions or location relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the positions or elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application.

[0034] The purpose of the present application is to provide a motor end cover 100 and a motor, which can conveniently protect the exposed fasteners, provide better sealing performance, and reduce the possibility of explosive gas entering the motor interior.

[0035] Please refer to Figure 1 and Figure 2 To achieve the above purpose, the present application provides a motor end cover 100, which is assembled at the end of the motor base 200. The motor end cover 100 comprises an end cover body 110, a first connecting part 120 arranged on the end cover body 110, the first connecting part 120 comprising a threaded part 121, a first mounting plate 122 connected to the threaded part 121 on the side away from the base 200 and extending along the circumference of the end cover body 110 to the outside of the threaded part 121, a second mounting plate 123 axially extending at the end of the first mounting plate 122 in the extension direction to form a mounting groove with the first mounting plate 122, and a protruding part 124 connected to the threaded part 121 on the side facing the base 200 and axially extending to form a first stepped surface with the end surface of the threaded part 121. The threaded part 121 abuts the base 200 through the first stepped surface. Connection holes 125 are provided at the corresponding positions of the threaded part 121 and the base 200, for connecting the motor end cover 100 and the base 200 by rotating the connecting part 400 along the mounting groove.

[0036] With the rotating shaft of the motor as a cylinder, the axial direction in the application refers to the rotating axis direction of the rotating shaft or a direction parallel to the rotating axis direction, the radial direction in the application refers to the cross-section radius extension direction in the circular cross-section perpendicular to the rotating axis direction of the rotating shaft, and the circumferential direction in the application refers to the circumferential direction of the rotating shaft, i.e. the rotating direction of the rotating shaft, which is perpendicular to the rotating axis of the rotating shaft and the cross-section radius in the circular cross-section.

[0037] The first mounting plate 122 is connected to the threaded portion 121 away from the base 200 and extends along the circumferential direction of the end cover body 110 to the outside of the threaded portion 121, so as to widen the first mounting plate 122, and the end of the second mounting plate 123 extends axially in the extension direction of the first mounting plate 122 to form a wider mounting groove with the first mounting plate 122. When the base 200 moves to the first step surface preset position, the connecting piece 400 is screwed into the mounting groove to connect the motor end cover 100 and the base 200. The wider mounting groove can facilitate the protection of the exposed fasteners, for example, by using an explosion-proof coating, so as to provide better sealing performance and reduce the possibility of explosive gas entering the motor.

[0038] Please refer to Figure 5 and Figure 6Further, the motor end cover 100 is also provided with a second connecting part 130, the second connecting part 130 is used for connecting the bearing inner cover 300 of the motor, the second connecting part 130 is provided with an engaging surface capable of being mutually attached with the bearing inner cover 300, that is, the motor end cover 100 has two explosion-proof structures, one is the first step surface matched with the base 200, and the other is the engaging surface mutually attached with the bearing inner cover 300. Taking three kinds of motors with explosion-proof marks of Ex db I Mb, Ex db IIB T4 Gb and Ex db IIC T4 Gb as examples, the explosion-proof structure of the motor end cover 100 and the bearing inner cover 300 of the Ex db I Mb and Ex db IIB T4 Gb motor can select the plane explosion-proof engaging surface and the stopper explosion-proof engaging surface, the explosion-proof structure of the motor end cover 100 and the bearing inner cover 300 of the motor with the explosion-proof mark of Ex db IIC T4 Gb can only select the stopper explosion-proof engaging surface due to the limitation of the processing capacity, generally, the processing cost of the plane explosion-proof engaging surface is smaller than that of the stopper explosion-proof engaging surface, the explosion-proof structure of the Ex db IIB T4 Gb motor often selects the plane explosion-proof engaging surface, so that the Ex db IIB T4 Gb and Ex db IIC T4 Gb often use two different end covers, at the same time, all the exposed fasteners of the motor with the explosion-proof mark of Ex db I Mb need to be protected, the lap matched with the base 200 needs to be set wider, and the end cover of the Ex db IIB T4 Gb and Ex db IIC T4 Gb is not the same, resulting in that the three kinds of motors with different explosion-proof marks have three sets of end covers, so that the model cost is doubled, the production management difficulty in the workshop is large, the production cost is high, and the appearance of the motor is not the same, which is not convenient for market promotion.

[0039] In the embodiment, the first mounting plate 122 is connected to the threaded portion 121 away from the base 200 and extends along the circumference of the end cover body 110 to the outside of the threaded portion 121 to widen the first mounting plate 122, and the second mounting plate 123 extends axially at the end of the first mounting plate 122 in the extension direction to form a wide mounting groove with the first mounting plate 122, thereby forming a wide lap, which is used as a part of the mold to produce a first motor end cover 100, and the second connecting portion 130 of the first motor end cover 100 is provided with a protrusion 131 extending axially to the outer circumference of the bearing inner cover 300 towards the end face of the bearing inner cover 300, and the joint surface is a second stepped surface (flange explosion-proof joint surface), which meets the explosion-proof structure of the motor end cover 100 and the bearing inner cover 300 of the Ex db I Mb, Ex db IIB T4 Gb and Ex db IIC T4 Gb motors, which are the same flange explosion-proof joint surface. Further, a movable block can be added to the mold for producing the first motor end cover 100, which can occupy the position corresponding to the protrusion 131 in the mold, to produce a second motor end cover 100 with a flat joint surface (flat explosion-proof joint surface), which meets the explosion-proof structure of the motor end cover 100 and the bearing inner cover 300 of the Ex db I Mb and Ex db IIB T4 Gb motors, and the two types of motor end covers 100 are produced by the same mold, which reduces the cost of the mold and the difficulty of production management in the workshop, and reduces the production cost.

[0040] When the motor end cover 100 meeting the Ex db I Mb and Ex db IIB T4 Gb motors needs to be produced, a movable block is added to the mold, which can occupy the position corresponding to the protrusion 131 in the mold to produce the second motor end cover 100 with a flat joint surface, and when the motor end cover 100 meeting the Ex db IIC T4 Gb motor needs to be produced, the movable block is removed from the mold to produce the first motor end cover 100 with a second stepped joint surface. In this way, the same mold is used to produce the motor end covers 100 meeting the three types of motors, and the differences between the motor end covers 100 of the three types of motors are only whether there is a protrusion 131, so that the shapes of the motor end covers 100 of the three types of motors are consistent, which is convenient for market promotion.

[0041] Please refer to Figure 3 and Figure 4In one embodiment, the second connecting portion 130 and the bearing inner cover 300 are provided with mounting holes 132 at corresponding positions, and the fixing member 500 can be screwed into the mounting holes 132 from the side of the second connecting portion 130 away from the bearing inner cover 300 to connect the second connecting portion 130 and the bearing inner cover 300, and the side of the second connecting portion 130 away from the bearing inner cover 300 is also connected with a bearing outer cover which is also provided with mounting holes 132, and the fixing member 500 is sequentially arranged in the mounting holes 132 of the bearing outer cover, the second connecting portion 130 and the bearing inner cover 300, so that the bearing outer cover and the bearing inner cover 300 are fixed relative to the second connecting portion 130, and the bearing arranged between the bearing inner cover 300 and the bearing outer cover is axially limited.

[0042] It should be noted that the connecting member 400 for connecting the motor end cover 100 and the base 200, and the fixing member 500 for connecting the motor end cover 100 and the bearing inner cover 300 can all be bolt fasteners, and the bolt fasteners are selected according to the size of the positioning pitch circle, and the Ex db IIB T4 Gb and Ex db IIC T4 Gb are considered, and the size of the explosion-proof that meets the two explosion-proof grades is selected, and the bolt that bears the explosion pressure is selected according to the explosion-proof requirements of the motor with the explosion-proof mark of Ex db IIC T4 Gb.

[0043] In one embodiment, the side of the end cover body 110 facing the bearing inner cover 300 is provided with an extension body 140 connected to the circumference of the second connecting portion 130, and the end face of the extension body 140 away from the second connecting portion 130 is provided with a first blind hole 141 extending to part of the second connecting portion 130, which can be used as a temperature measuring hole for the temperature measuring element to measure the temperature of the second connecting portion 130 and the bearing, wherein the extension body 140 is two, each extension body 140 is provided with a first blind hole 141, and the included angle between the two first blind holes 141 and the central axis of the end cover body 110 is 50°-80°, preferably 65°, in addition, the circumferential surface of the end cover body 110 is also provided with a radially extending second blind hole 160, which can be used as a vibration measuring hole for placing a vibration detection element to detect the vibration of the motor end cover 100.

[0044] In one embodiment, the end cover body 110 is further provided with a first channel 150, the first channel 150 comprising a first flow passage 151 extending radially and a second flow passage 152 extending axially, the first flow passage 151 comprising a first end located at the circumferential surface of the end cover body 110 and a second end located at the second connecting portion 130, the second flow passage 152 comprising a third end and a fourth end, the third end being communicated with the second end, and the fourth end being located at the end surface of the second connecting portion 130 facing the bearing inner cover 300, and the fourth end being used for being communicated with the oil injection hole of the bearing inner cover 300; the first channel 150 is used for adding lubricating oil into the oil injection hole of the bearing inner cover 300 for lubricating the bearing, wherein the first end of the first flow passage 151 is higher than the second end after the end cover body 110 is assembled, so as to make the lubricating oil flow into the second end along the first end of the first flow passage 151 and flow horizontally along the second flow passage 152 to the oil injection hole, wherein the first channel 150 is two, that is, two first flow passages 151 and two second flow passages 152, the included angle between the two first flow passages 151 is 30°-80°, preferably 45°, so as to make the two first flow passages 151 be spaced apart as far as possible to reduce the included angle with the vertical direction, and the first channel 150 can also be used as a temperature measuring hole in addition to being used as an oil injection channel, so as to place a temperature measuring element.

[0045] The application also provides an electric machine comprising the above-mentioned electric machine end cover 100, which also has the beneficial effects of the above-mentioned electric machine end cover 100, which will not be described here again.

[0046] It should be noted that the relative terms, such as first and second, in the present specification are only used to distinguish one entity from another entity, and do not necessarily require or imply any actual relationship or order between the entities.

[0047] The various embodiments in the present specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between various embodiments can be referred to each other.

[0048] The principle and implementation mode of the present application are described by using specific examples in the present specification, and the above embodiment description is only used to help understand the method and core idea of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the principle of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the present application.

Claims

1. An electric machine end cover, which is assembled to the end of a machine base (200) of an electric machine, characterized in that, The motor end cover (100) comprises an end cover body (110), a first connecting part (120) arranged on the end cover body (110), the first connecting part (120) comprising a threaded part (121), a first mounting plate (122) connected to the threaded part (121) on the side away from the base (200) and extending along the circumference of the end cover body (110) to the outside of the threaded part (121), a second mounting plate (123) extending axially at the end of the first mounting plate (122) in the extension direction to form a mounting groove with the first mounting plate (122), and a protruding part (124) connected to the threaded part (121) on the side towards the base (200) and extending axially to form a first stepped surface with the end surface of the threaded part (121), the threaded part (121) abutting the base (200) through the first stepped surface, and the threaded part (121) and the base (200) being provided with connecting holes (125) at corresponding positions for connecting members (400) to be screwed into the mounting groove and connecting the motor end cover (100) and the base (200).

2. The motor endshield of claim 1, wherein The motor end cover (100) is further provided with a second connecting part (130) for connecting the bearing inner cover (300) of the motor, the second connecting part (130) being provided with an engaging surface capable of being mutually fitted with the bearing inner cover (300).

3. The motor end bell of claim 2, wherein, The engaging surface is a plane; or, The second connecting part (130) is provided with a protrusion (131) extending axially to the outer periphery of the bearing inner cover (300) on the end surface thereof towards the bearing inner cover (300), and the engaging surface is a second stepped surface.

4. The motor end bell of claim 2, wherein, The second connecting part (130) and the bearing inner cover (300) are provided with mounting holes (132) at corresponding positions, and a fixing member (500) can be screwed into the mounting hole (132) on the side of the second connecting part (130) away from the bearing inner cover (300) to connect the mutually fitted second connecting part (130) and bearing inner cover (300).

5. The motor endshield of claim 2, wherein The end cover body (110) is provided with an extension body (140) on the side towards the bearing inner cover (300), the extension body (140) being connected to the circumference of the second connecting part (130), and the end surface of the extension body (140) away from the second connecting part (130) is provided with a first blind hole (141) extending to part of the second connecting part (130).

6. The motor endshield of claim 5, wherein The end cover body (110) is further provided with a first channel (150), the first channel (150) comprises a first flow channel (151) extending in a radial direction and a second flow channel (152) extending in an axial direction, the first flow channel (151) comprises a first end located at a circumferential surface of the end cover body (110) and a second end located at the second connecting part (130), the second flow channel (152) comprises a third end and a fourth end, the third end is communicated with the second end, and the fourth end is located at an end surface of the second connecting part (130) facing the bearing inner cover (300) and is used for being communicated with an oil injection hole of the bearing inner cover (300).

7. The motor end bell of claim 5, wherein, The circumferential surface of the end cover body (110) is further provided with a second blind hole (160) extending in a radial direction.

8. The motor end bell of claim 6, wherein, The first channel (150) is two, and the included angle between the two first flow channels (151) is 30°-80°.

9. The motor end bell of claim 6, wherein, The extension body (140) is two, and the included angle between the two first blind holes (141) and the axis of the end cover body (110) is 50°-80°.

10. An electric machine characterized by The motor end cover comprises the motor end cover according to any one of claims 1-9.

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