Motor rear end cover

Abstract

The utility model provides a motor rear end cover, and belongs to the technical field of brushless motor manufacturing. Comprising an end cover body fixedly connected to one end of a motor housing; the boss is arranged on one side, facing the motor, of the end cover body; the bearing chamber is used for mounting a bearing; the closed sleeve is arranged in the middle of the cavity in a protruding mode, and the interior of the closed sleeve communicates with the bearing chamber; the annular clamping block is arranged on the inner side wall of the cavity, the annular clamping block is matched with the bottom wall of the cavity to form an annular clamping groove, and a notch is formed in the annular clamping block. According to the utility model, the end cover body cooperates with the motor housing to realize closed protection of the internal motor, so that external dust and impurities are prevented from entering the motor through a gap at the protruding position of the motor shaft of the rear end cover, and the service life of the motor is prolonged; and the mounting seat is clamped outside the end cover body and is matched with the sealant for limiting and fixing, so that the operation is convenient and fast, and the subsequent maintenance efficiency of the motor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of brushless motor manufacturing, in particular to a rear end cover of a motor. Background Art

[0002] A brushless DC motor, consisting of a motor and a driver, is a typical mechatronic product. Because it operates in an autonomous manner, it does not require a separate starting winding on the rotor, as is the case with synchronous motors that start under heavy loads under variable frequency speed regulation. It also avoids oscillation and loss of synchronism under sudden load changes. Furthermore, brushless motors are smaller than brushed motors, meeting the current market demand for miniaturization in various products.

[0003] In terms of sealing, the rear end cover of brushless motors currently on the market often adopts a simple sealing structure, and the motor shaft passes through the rear end cover, which easily leads to external dust, impurities and water vapor entering the interior of the motor, causing corrosion and damage to the internal components of the motor. Especially in harsh working environments, such as humid, dusty or oily places, the sealing performance of the traditional motor rear end cover is even more difficult to meet actual needs.

[0004] Therefore, the present application provides a motor rear end cover to meet the needs. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a motor rear end cover to solve the problems of the existing dd.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A rear end cover of a motor comprises: an end cover body, which is fixedly connected to one end of the motor housing, and a mounting flange is provided at one end of the motor housing, and a plurality of threaded holes distributed in a circular array are provided on the mounting flange for cooperating with the installation of the end cover body; a boss, which is arranged on the side of the end cover body facing the motor, and a cavity is provided inside the boss, and the cavity is provided on the side of the end cover body away from the motor; a bearing chamber, which is annular in structure and protrudes from the end of the end cover body facing the motor, and is used for installing a bearing; a closed sleeve, which is protrudingly arranged in the middle position of the cavity, and the interior of the closed sleeve is communicated with the bearing chamber; an annular clamping block, which is arranged on the inner side wall of the cavity, and the annular clamping block cooperates with the bottom wall of the cavity to form an annular clamping groove, and a notch is provided on the annular clamping block.

[0008] Preferably, it also includes mounting holes, which are provided in the same number as the threaded holes and are distributed in a circular array at the edge of the end cover body and are fixedly connected to the mounting flange by bolts.

[0009] Preferably, it also includes a sealing ring groove, which is provided on the outer side wall of the end cover body and is used to install a sealing ring, which cooperates with the inner side wall of the motor housing for sealing connection.

[0010] Preferably, it further includes through grooves, which are provided in plurality and distributed in arc-shaped lines on the bottom wall of the cavity. The through grooves connect the two sides of the end cover body and are arranged directly below the notch.

[0011] Preferably, it also includes a wiring hole, which is opened on the end cover body and connects the two sides of the end cover body for passing the wires.

[0012] Preferably, a mounting base is also included for mounting an encoder to monitor the motor shaft speed and rotational position.

[0013] Preferably, the mounting seat includes: a ring sleeve, which has an annular structure, the inner wall of the ring sleeve is slidingly connected to the outer wall of the closed sleeve, and the outer wall of the ring sleeve is slidingly connected to the inner wall of the cavity; an arc-shaped clamping block, which is arranged at the bottom position of the outer wall of the ring sleeve, and is slidingly connected to the clamping groove, and the thickness of the arc-shaped clamping block is less than the thickness of the ring sleeve, and the length of the arc-shaped clamping block is less than the length of the notch opening.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects:

[0015] In the above scheme, the end cover body is combined with the motor housing to achieve closed protection for the internal motor, preventing external dust and impurities from entering the motor through the gap at the protruding position of the motor shaft of the rear end cover, thereby improving the service life of the motor; by setting a mounting seat to be connected to the outside of the end cover body and combining with sealant to limit and fix it, the operation is convenient and quick, thereby improving the efficiency of subsequent maintenance of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable one skilled in the relevant art to make and use the present disclosure.

[0017] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram from another angle;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the utility model;

[0020] Figure 4 for Figure 3 Schematic diagram from another angle;

[0021] Figure 5 This is a schematic diagram of the structure of the utility model when assembled with the motor housing;

[0022] Figure 6 This is a schematic diagram of the mounting base structure of the utility model.

[0023] In the figure: 1. End cover body; 11. Mounting hole; 2. Boss; 21. Slot; 3. Annular block; 31. Notch; 4. Through slot; 5. Closing sleeve; 6. Wiring hole; 7. Bearing chamber; 8. Sealing ring groove; 9. Motor housing; 91. Mounting flange; 92. Threaded hole; 10. Mounting seat; 101. Ring sleeve; 102. Arc block.

[0024] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the appended claims. DETAILED DESCRIPTION

[0025] The following describes in detail a motor rear end cover provided by the present invention, in conjunction with the accompanying drawings and specific embodiments. It is also noted that, to provide a more detailed description, the following embodiments are best and preferred embodiments. For some known technologies, those skilled in the art may also adopt other alternatives to implement them. Furthermore, the accompanying drawings are only for the purpose of describing the embodiments in more detail and are not intended to limit the present invention.

[0026] like Figure 1 - Figure 6 As shown, an embodiment of the present invention provides a rear end cover of a motor, comprising: an end cover body 1, fixedly connected to one end of a motor housing 9, a mounting flange 91 being provided at one end of the motor housing 9, a plurality of threaded holes 92 distributed in a circular array being provided on the mounting flange 91 for cooperating with the installation of the end cover body 1; a boss 2 being arranged on the side of the end cover body 1 facing the motor, and a cavity being provided inside the boss 2, and the cavity being provided on the side of the end cover body 1 away from the motor; a bearing chamber 7 being an annular structure and protruding from the end of the end cover body 1 facing the motor, for installing a bearing; a closing sleeve 5 being protrudingly arranged in the middle position of the cavity, and the interior of the closing sleeve 5 and the bearing chamber 7 being communicated with each other; an annular clamping block 3 being arranged on the inner side wall of the cavity, the annular clamping block 3 cooperates with the bottom wall of the cavity to form an annular clamping groove 21, and a notch 31 being provided on the annular clamping block 3.

[0027] The arrangement of the boss 2 enhances the structural strength of the end cover body 1, especially in the area that bears axial and radial forces when the motor is running. The design of its internal cavity makes full use of the space, providing a basis for installation and support for other internal components such as the closed sleeve 5 and the mounting seat 10; the cavity is opened on the side of the end cover body 1 away from the motor. This open design helps to dissipate heat, especially when the motor is running for a long time or under high load, it can effectively reduce the internal temperature and improve the operating efficiency and life of the motor; wherein, the annular structure of the bearing chamber 7 ensures the stable installation and positioning of the bearing, and reduces the risk of bearing damage caused by vibration or impact; the interior of the closed sleeve 5 is interconnected with the bearing chamber 7. This design facilitates the lubrication and cooling of the bearing. Through appropriate lubrication channels, the necessary lubricant can be provided to the bearing, reducing friction and wear, while keeping the bearing chamber 7 clean, and the end cover body 1 cooperates with the motor housing 9 to achieve closed protection of the internal motor, preventing external dust and impurities from entering the motor through the gap at the protruding position of the rear end cover motor shaft, thereby improving the service life of the motor.

[0028] like Figure 1 As shown, it also includes mounting holes 11, which are provided with the same number as the threaded holes 92, distributed in a circular array at the edge of the end cover body 1, and fixedly connected to the mounting flange 91 by bolts.

[0029] Among them, the mounting flange 91 serves as the connection interface between the motor housing 9 and the end cover body 1, and the threaded holes 92 thereon allow the use of fasteners such as bolts to firmly connect the two together. This design not only ensures the reliability of the connection, but also facilitates disassembly and maintenance.

[0030] like Figure 4 As shown, it also includes a sealing ring groove 8, which is set on the outer wall of the end cover body 1 and is used to install a sealing ring, which is sealed and connected with the inner wall of the motor housing 9.

[0031] like Figure 3 As shown, it also includes through grooves 4, which are provided in multiple and distributed in arc lines on the bottom wall of the cavity. The through grooves 4 connect the two sides of the end cover body 1 and are arranged just below the notch 31, which is convenient for sealing with sealant.

[0032] Among them, the setting of the through groove 4 makes it convenient to balance the internal and external air pressure of the motor when assembling the end cover body 1 and the motor housing 9, which facilitates assembly. After the assembly is completed, the through groove 4 is sealed by filling the inner cavity with sealant to achieve sealing of the internal space of the motor. The sealant is preferably DJ-A2 sealant, which has a good sealing effect.

[0033] like Figure 1 As shown, it also includes a wiring hole 6, which is opened on the end cover body 1 and connects the two sides of the end cover body 1 for passing the wires.

[0034] like Figure 6 As shown, it also includes a mounting base 10 for installing an encoder to monitor the motor shaft speed and rotation position. The mounting base 10 includes: a ring sleeve 101, which is annular in structure. The inner wall of the ring sleeve 101 is slidably connected to the outer wall of the closed sleeve 5, and the outer wall of the ring sleeve 101 is slidably connected to the inner wall of the cavity; an arc-shaped clamping block 102 is arranged at the bottom position of the outer wall of the ring sleeve 101, and is slidably connected to the clamping groove 21, and the thickness of the arc-shaped clamping block 102 is less than the thickness of the ring sleeve 101, and the length of the arc-shaped clamping block 102 is less than the opening length of the notch 31.

[0035] Among them, the encoder adopts a magnetoelectric encoder, and the encoder test coil is arranged inside the ring sleeve 101. When the ring sleeve 101 is sleeved on the outside of the sealing ring groove 8, the motor shaft is inside the encoder test coil, so that the encoder works normally. During the installation of the mounting seat 10, the ring sleeve 101 is aligned with the outer wall of the sealing ring groove 8 and the arc-shaped block 102 is aligned with the notch 31. As the ring sleeve 101 slides down, the arc-shaped block 102 enters the horizontal area of the slot 21. Then the mounting seat 10 is rotated as a whole, and the arc-shaped block 102 slides into the inner area of the slot 21 to complete the snap-on installation.

[0036] The technical solution provided by the present invention is that when assembling the motor, a sealing ring is installed in the sealing ring groove 8 on the outer wall of the end cover body 1, ensuring that the sealing ring is installed in place and without damage, and the adapter and bearing are installed inside the bearing chamber 7, and the outer wall of the bearing is fixed to the inner wall of the bearing chamber 7 by fixing glue, and then the end cover body 1 is placed on the mounting flange 91 of the motor housing 9, ensuring that the two are aligned, and the end cover body 1 is firmly fixed to the motor housing 9 by using bolts through the mounting holes 11 and the threaded holes 92. Pay attention to tightening the bolts according to the specified torque value to ensure the reliability of the connection, pass the wires required for the motor through the wiring holes 6, and connect them to the corresponding wiring terminals inside the motor, and then check the encoder and its accessories (such as the magnetoelectric encoder test Check whether the coil, mounting seat 10, etc. are intact, align the ring sleeve 101 with the outer wall of the sealing ring groove 8 on the end cover body 1, ensure that the inner wall of the ring sleeve 101 is aligned with the outer wall of the closed sleeve 5, and at the same time ensure that the arc-shaped clamping block 102 is aligned with the notch 31 on the annular clamping block 3, and gently push the ring sleeve 101 to slide down along the inner wall of the cavity. When the arc-shaped clamping block 102 enters the horizontal area of the annular clamping groove 21, gently rotate the mounting seat 10 as a whole so that the arc-shaped clamping block 102 slides smoothly into the inner area of the clamping groove 21 to complete the card connection installation. Subsequently, DJ-A2 sealant is poured into the inner cavity area under the slot on the mounting seat 10. After it is completely cured, it not only blocks the through groove 4 to complete the seal, but also limits the rotation of the mounting seat 10 by the cured colloid.

[0037] This invention encompasses any alternatives, modifications, equivalents, and solutions that do not depart from the spirit and scope of this invention. While specific details are described in detail in the preferred embodiments of this invention to provide a thorough understanding, those skilled in the art will be able to fully understand this invention without these details. Furthermore, to avoid unnecessary confusion regarding the essence of this invention, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A motor rear end cover, characterized in that: include: An end cover body (1) is fixedly connected to one end of a motor housing (9), wherein one end of the motor housing (9) is provided with a mounting flange (91), and the mounting flange (91) is provided with a plurality of threaded holes (92) distributed in an annular array for cooperating with the mounting of the end cover body (1); A boss (2) is arranged on a side of the end cover body (1) facing the motor, and a cavity is provided inside the boss (2), and the cavity is provided on a side of the end cover body (1) away from the motor; The bearing chamber (7) is annular in structure and protrudes from the end of the end cover body (1) facing the motor, and is used for mounting a bearing; A closed sleeve (5) is protrudingly arranged in the middle of the cavity, and the interior of the closed sleeve (5) is in communication with the bearing chamber (7); An annular clamping block (3) is arranged on the inner side wall of the cavity. The annular clamping block (3) cooperates with the bottom wall of the cavity to form an annular clamping groove (21). A notch (31) is provided on the annular clamping block (3).

2. The motor rear end cover according to claim 1, characterized in that: It also includes mounting holes (11), which are provided with the same number as the threaded holes (92), are distributed in a circular array at the edge of the end cover body (1), and are fixedly connected to the mounting flange (91) by bolts.

3. The motor rear end cover according to claim 1, characterized in that: It also includes a sealing ring groove (8) provided on the outer side wall of the end cover body (1) for mounting a sealing ring, which cooperates with the inner side wall of the motor housing (9) for sealing connection.

4. The motor rear end cover according to claim 1, characterized in that: It also includes through grooves (4), which are provided in plurality and distributed in an arc-shaped line on the bottom wall of the cavity. The through grooves (4) communicate with two sides of the end cover body (1) and are arranged directly below the notch (31).

5. The motor rear end cover according to claim 1, characterized in that: It also includes a wiring hole (6), which is opened on the end cover body (1) and communicates with two sides of the end cover body (1) for passing the wires.

6. The motor rear end cover according to claim 1, characterized in that: Also included is a mounting base (10) for mounting an encoder to monitor the motor shaft speed and rotational position.

7. The motor rear end cover according to claim 6, characterized in that: The mounting seat (10) comprises: The ring sleeve (101) is an annular structure, the inner side wall of the ring sleeve (101) is slidably connected to the outer side wall of the closed sleeve (5), and the outer side wall of the ring sleeve (101) is slidably connected to the inner side wall of the cavity; An arc-shaped clamping block (102) is arranged on the outer side wall of the ring sleeve (101) near the bottom, and is slidably connected with the clamping groove (21). The thickness of the arc-shaped clamping block (102) is less than the thickness of the ring sleeve (101), and the length of the arc-shaped clamping block (102) is less than the opening length of the notch (31).

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