A fan cover for controlling the air inlet distance of an electric motor and the electric motor

Abstract

This utility model discloses a fan shroud for controlling the air intake distance of a motor and a motor, relating to the field of motor manufacturing technology. The fan shroud is installed at the rear end of the motor near the fan blades. The fan shroud includes a fixed shroud and a movable shroud head. The fixed shroud has a cylindrical structure and is detachably installed at the rear end, with its axis parallel to the motor axis. The movable shroud head is movably installed on the inner wall of the fixed shroud and has several ventilation holes. The movable shroud head is used to cover the fan blades. This design results in a simple overall structure, flexible operation, and ease of implementation, and can meet the needs of precise and controllable air intake distance for fans of different sizes during motor temperature rise testing.

Description

Technical Field

[0001] This utility model relates to the field of motor manufacturing technology, and in particular to a fan cover for controlling the air inlet distance of a motor. Background Technology

[0002] Currently used motor fan covers are mostly made of cold-rolled steel plates in one piece. When changing fans of different sizes during motor temperature rise testing, it is impossible to quickly adjust the air intake distance. Re-making molds is costly and time-consuming, and they can only be used for fans of a specific width. If the fan cover has a margin in axial length to accommodate fans of different widths, the optimal air intake cannot be achieved. Therefore, to meet testing needs, a flexible, adjustable, and low-cost fan cover structure has been introduced.

[0003] Therefore, how to provide a fan cover to control the air intake distance of the motor is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide a fan cover for controlling the air intake distance of a motor, which can control the distance between the cover and the fan blades.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A fan shroud for controlling the air intake distance of a motor is installed at the rear end of the motor near the fan blades. The fan shroud includes:

[0007] The fixed cover is a cylindrical structure. The fixed cover is detachably installed at the rear end, and the axis of the fixed cover is parallel to the axis of the motor.

[0008] The movable cover is movably installed on the inner wall of the fixed cover cylinder. The movable cover has several ventilation holes and is used to cover the fan blades.

[0009] Preferably, the device also includes an adjusting screw, which passes through the movable cover and moves synchronously with it. The axis of the adjusting screw is parallel to the axis of the motor. The outer periphery of the end of the adjusting screw near the rear end cover is provided with an external thread. The inner wall of the fixed cover is provided with a connecting nut for threaded connection with the adjusting screw. The adjusting screw is used to adjust the distance between the movable cover and the fan blades.

[0010] Preferably, the end of the adjusting screw near the rear end cover is provided with a stop protrusion, which is used to prevent the adjusting screw from disengaging from the connecting nut.

[0011] Preferably, the movable cover head is provided with a connecting part for the adjustment screw to pass through, and the connecting part has a first through hole parallel to the axis of the motor.

[0012] Preferably, the end of the adjusting screw away from the stop protrusion is provided with a screwing protrusion, and a limit protrusion is provided on the outer periphery of the adjusting screw between the screwing protrusion and the stop protrusion. The limit protrusion and the screwing protrusion abut against the two ends of the connecting part, so that the adjusting screw and the movable cover head move synchronously.

[0013] Preferably, the screw-on protrusion has a hexagonal prism structure.

[0014] Preferably, the fixed cover is fixedly installed on the outer peripheral surface of the rear end by mounting bolts, and the axis of the mounting bolts is perpendicular to the axis of the motor.

[0015] Preferably, the movable cover is a one-piece structure, and its processing technology is sheet metal.

[0016] Preferably, the inner wall of the fixed cover is provided with a sliding protrusion extending along its axial direction, and the side wall of the movable cover head that fits against the fixed cover is provided with a sliding groove that cooperates with the sliding protrusion.

[0017] An electric motor, including a fan shroud as described above for controlling the air intake distance of the motor.

[0018] Compared with the above-mentioned background technology, the present invention provides a fan cover for controlling the air intake distance of a motor, which is installed at the rear end of the motor near the fan blades. The fan cover includes: a fixed cover cylinder and a movable cover head; the fixed cover cylinder is a cylindrical structure, which is detachably installed at the rear end, and the axis of the fixed cover cylinder is parallel to the axis of the motor; the movable cover head is movably installed on the inner wall of the fixed cover cylinder, and the movable cover head is provided with several ventilation holes, which is used to cover the fan blades.

[0019] Specifically, in this embodiment, the fixed cover and the movable cover cooperate to completely cover the outer periphery of the fan blades at the rear end of the motor. The fixed cover is fixedly connected to the rear end and has a cylindrical shape, while the movable cover is movably nested within the inner wall of the fixed cover. In other words, the fixed cover supports and installs the movable cover and provides guidance for its movement, while the movable cover protects the fan blades. It should be noted that the distance between the movable cover and the fan blades can be manually adjusted. With this design, the overall structure of the fan cover is simple, flexible in operation, and easy to implement, and can meet the needs of precise and controllable air intake distance for fans of different sizes during motor temperature rise testing. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0021] Figure 1 This is a cross-sectional view of the wind shield installation state provided in an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the installation state structure of the wind shield provided in an embodiment of the present utility model;

[0023] Figure 3 This is a front view of the installation state of the wind shield provided in an embodiment of this utility model.

[0024] in:

[0025] 01 - Fan blades; 02 - Rear end;

[0026] 100 - Fixed cover, 110 - Connecting nut, 120 - Mounting bolt;

[0027] 200 - Movable hood, 210 - Ventilation hole, 220 - Connecting part;

[0028] 300 - Adjusting screw, 310 - Stop protrusion, 320 - Tightening protrusion, 330 - Limiting protrusion. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left" and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the indicated position or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of this utility model.

[0032] The purpose of this invention is to provide a fan cover for controlling the air intake distance of a motor, which can control the distance between the cover and the fan blades.

[0033] It should be noted that in this embodiment, L in Figure 1 represents the distance between the movable cover and the fan blades.

[0034] To achieve the above objectives, the present invention provides the following technical solution:

[0035] Please see Figures 1 to 3 This embodiment provides a fan cover for controlling the air intake distance of a motor. It is installed at the rear end 02 of the motor near the fan blades 01. The fan cover includes a fixed cover cylinder 100 and a movable cover head 200. The fixed cover cylinder 100 is a cylindrical structure and is detachably installed at the rear end 02. The axis of the fixed cover cylinder 100 is parallel to the axis of the motor. The movable cover head 200 is movably installed on the inner wall of the fixed cover cylinder 100. The movable cover head 200 is provided with a plurality of ventilation holes 210 and is used to cover the fan blades 01.

[0036] In this embodiment, the fixed cover 100 is a cylindrical structure with a circular cross-section, while the movable cover 200 is a cylindrical structure with a circular cross-section and an open end. The size of the fixed cover 100 is exactly the same as the size of the rear end 02 of the motor, and the diameter of the movable cover 200 is slightly smaller than the diameter of the fixed cover 100. That is, the side wall of the movable cover 200 can fit against the inner side wall of the fixed cover 100, and the two can move relative to each other without shaking. The right end face of the movable cover is provided with a number of ventilation holes 210 so that the fan blades 01 can function normally.

[0037] In the installed state, the side walls of the fixed cover 100 and the side walls of the movable cover 200 are parallel to the axis of the motor, while the right end face of the movable cover 200 is perpendicular to the axis of the motor. The distance between the right end face of the movable cover 200 and the fan blade 01 is L. In this embodiment, the movement of the movable cover 200 can change the length of L, thereby adapting to the need for precise and controllable air intake distance of different sized fans during motor temperature rise testing.

[0038] Specifically, in this embodiment, the fixed cover 100 and the movable cover 200 cooperate to completely cover the outer periphery of the fan blades 01 at the rear end 02 of the motor. The fixed cover 100 is fixedly connected to the rear end 02 and has a cylindrical shape, while the movable cover 200 is movably nested within the inner wall of the fixed cover 100. That is, the fixed cover 100 supports and installs the movable cover 200 and provides guidance for its movement, while the movable cover 200 protects the fan blades 01. It should be noted that the distance between the movable cover 200 and the fan blades 01 can be manually adjusted. With this design, the overall structure of the fan cover is simple, flexible in operation, and easy to implement, and can meet the needs of precise and controllable air intake distance for fans of different sizes during motor temperature rise testing.

[0039] Preferably, the device also includes an adjusting screw 300, which passes through the movable cover 200 and moves synchronously with it. The axis of the adjusting screw 300 is parallel to the axis of the motor. The outer periphery of the end of the adjusting screw 300 near the rear end cover is provided with an external thread. The inner wall of the fixed cover 100 is provided with a connecting nut 110 for threaded connection with the adjusting screw 300. The adjusting screw 300 is used to adjust the distance between the movable cover 200 and the fan blades.

[0040] Specifically, such as Figure 1 As shown, in this embodiment, the movement of the movable cover head 200 is achieved by adjusting the screw 300. Firstly, when the adjusting screw 300 is installed, its axis is parallel to the motor axis, and a section of its left end has an external thread. Simultaneously, a connecting nut 110 is fixed at a suitable position on the inner wall of the fixed cover cylinder 100, and this connecting nut 110 can precisely engage with the external thread on the left end of the adjusting screw 300. With this configuration, when the adjusting screw 300 rotates around its own axis, the connecting nut 110 allows the adjusting screw 300 to move back and forth along the motor axis. The adjusting screw 300 passes through the movable cover 200, and a portion of its right end is fixed relative to the movable cover 200. That is, both can rotate, but they can move synchronously along the direction of the motor axis. In other words, when the adjusting screw 300 rotates, it will move to the left or right in the direction of the motor axis. However, due to the connection between the adjusting screw 300 and the movable cover 200, the adjusting screw 300 will drive the movable cover 200 to move along the motor axis when it moves. This allows the movable cover 200 to move closer to or further away from the fan blades 01, thereby adjusting the length of the air intake distance L.

[0041] It should be noted that the length of the external thread set at the left end of the adjusting screw 300 is the range of movement of the movable cover head 200.

[0042] Preferably, the end of the adjusting screw 300 near the rear end cover is provided with a stop protrusion 310, which is used to prevent the adjusting screw 300 from disengaging from the connecting nut 110.

[0043] Understandably, a stop protrusion 310 with a size larger than its own diameter is provided at the leftmost end of the adjusting screw 300, that is, the end closest to the rear end 02 of the motor. This setting prevents the adjusting screw 300 from passing through the connecting nut 110 when it moves outward, thus preventing the adjusting screw 300 from falling off. It should be noted that when the stop protrusion 310 contacts the connecting nut 110, the maximum length of the air inlet distance L is reached. In practical applications, the maximum length of the air inlet distance L can be changed by adjusting the setting position of the connecting nut 110 and the length of the adjusting screw 300.

[0044] Preferably, the movable cover head 200 is provided with a connecting part 220 for the adjusting screw 300 to pass through, and the connecting part 220 is provided with a first through hole parallel to the axis of the motor.

[0045] In this embodiment, to facilitate the insertion of the adjusting screw 300, a specific connecting part 220 is provided on the movable cover head 200. The connecting part 220 has a first through hole inside, through which the adjusting screw 300 passes during installation. Specifically, as shown... Figure 2 and Figure 3 As shown, the connecting part 220 itself has a certain length along the motor axis. This is designed to increase the contact area between the adjusting screw 300 and the connecting part 220, thereby ensuring the stability of the connection between the two.

[0046] It should be noted that, in order to ensure the smooth movement of the movable cover 200, this embodiment provides three adjusting screws 300, and correspondingly three connecting parts 220, which are evenly distributed at a 120-degree angle on the right end face of the movable cover 200. Of course, the number of adjusting screws 300, connecting nuts 110, and connecting parts 220 can be adjusted according to actual conditions, as long as the stable installation and movement of the movable cover 200 are guaranteed.

[0047] Preferably, the end of the adjusting screw 300 away from the stop protrusion 310 is provided with a turning protrusion 320, and a limiting protrusion 330 is provided on the outer periphery of the adjusting screw 300 between the turning protrusion 320 and the stop protrusion 310. The limiting protrusion 330 and the turning protrusion 320 respectively abut against the two ends of the connecting part 220 so that the adjusting screw 300 and the movable cover head 200 move synchronously.

[0048] In this embodiment, the synchronous movement of the adjusting screw 300 and the movable cover head 200 is achieved through the connection part 220, which is formed by the screwing protrusion 320 and the limiting protrusion 330 on the outer periphery of the adjusting screw 300. Specifically, the right end of the adjusting screw 300 is a screw with a smooth circumferential surface, and a screwing protrusion 320 with a relatively large diameter is provided at its rightmost end. The left end of the screwing protrusion 320 abuts against the right end of the connection part 220 to prevent the movable cover head 200 from moving to the right relative to the adjusting screw 300. At the same time, a limiting protrusion 330 is also provided on the adjusting screw 300, which abuts against the left end of the connection part 220 to prevent the movable cover head 200 from moving to the left relative to the adjusting screw 300. With this arrangement, it can be ensured that the adjusting screw 300 and the movable cover head 200 can move synchronously along the motor axis, but the adjusting screw 300 can also rotate within the connection part 220.

[0049] Preferably, the screw protrusion 320 has a hexagonal prism structure.

[0050] Understandably, this design is intended to allow operators to easily and quickly adjust the air inlet distance L by turning the adjusting screw 300. This design also facilitates the application of torque by the operator and prevents slippage during turning.

[0051] Preferably, the fixed cover 100 is fixedly installed on the outer peripheral surface of the rear end 02 by a connecting nut 120, and the axis of the connecting nut 120 is perpendicular to the axis of the motor.

[0052] In this embodiment, the side wall of the fixed cover 100 is fixedly installed by three connecting nuts 120 evenly distributed at the rear end 02 of the motor. When the connecting nuts 120 are installed, their axes are exactly perpendicular to the axis of the motor. Of course, the number and distribution of the connecting nuts 120 can be adjusted appropriately according to the actual situation, and no specific limitation is made here.

[0053] Preferably, the movable cover 200 is a one-piece structure, and its processing technology is sheet metal.

[0054] In this embodiment, the movable cover 200 is an integral structure and can be formed by sheet metal processing. Of course, this is only one processing method, and the movable cover 200 can also be processed by other methods according to actual needs.

[0055] Preferably, the inner wall of the fixed cover 100 is provided with a sliding protrusion extending along its axial direction, and the side wall of the movable cover 200 that fits against the fixed cover 100 is provided with a sliding groove that cooperates with the sliding protrusion.

[0056] In another embodiment, a sliding protrusion extending along its axial direction can be provided on the inner wall of the fixed cover 100, and a sliding groove corresponding to the sliding protrusion can be provided on the outer periphery of the side wall of the movable cover 200. The sliding protrusion can cooperate with the sliding groove to form a function similar to a slider and a guide rail. This arrangement can make the movement of the movable cover 200 more stable and smooth.

[0057] This application also provides an electric motor, including a shroud as described above for controlling the air intake distance of the motor, and thus the motor also has the beneficial effects of the aforementioned shroud.

[0058] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0059] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0060] The embodiments provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A shroud for controlling the inlet distance of an electric motor, installed on the rear end (02) of the electric motor close to the fan blades (01), characterized in that, include: The fixed cover (100) is a cylindrical structure. The fixed cover (100) is detachably installed at the rear end (02), and the axis of the fixed cover (100) is parallel to the axis of the motor. The movable cover (200) is movably installed on the inner wall of the fixed cover (100). The movable cover (200) is provided with a plurality of ventilation holes (210). The movable cover (200) is used to cover the fan blades (01).

2. The shroud for controlling the inlet air distance of an electric motor according to claim 1, wherein, It also includes an adjusting screw (300), which passes through the movable cover (200) and moves synchronously with the movable cover (200). The axis of the adjusting screw (300) is parallel to the axis of the motor. The outer periphery of the end of the adjusting screw (300) near the rear end cover is provided with an external thread. The inner wall of the fixed cover (100) is provided with a connecting nut (110) for threaded connection with the adjusting screw (300). The adjusting screw (300) is used to adjust the distance between the movable cover (200) and the fan blades.

3. The shroud for controlling the inlet air distance of an electric motor according to claim 2, wherein, The adjusting screw (300) has a stop protrusion (310) at the end near the rear end cover. The stop protrusion (310) is used to prevent the adjusting screw (300) from disengaging from the connecting nut (110).

4. The shroud for controlling the inlet air distance of an electric motor according to claim 3, wherein, The movable cover (200) is provided with a connecting part (220) for the adjusting screw (300) to pass through, and the connecting part (220) has a first through hole parallel to the axis of the motor.

5. The shroud for controlling the inlet air distance of an electric motor according to claim 4, wherein, The adjusting screw (300) has a screwing protrusion (320) at the end opposite to the stop protrusion (310). A limiting protrusion (330) is provided on the outer periphery of the adjusting screw (300) between the screwing protrusion (320) and the stop protrusion (310). The limiting protrusion (330) and the screwing protrusion (320) respectively abut against the two ends of the connecting part (220) so that the adjusting screw (300) moves synchronously with the movable cover head (200).

6. The shroud for controlling the inlet air distance of an electric motor according to claim 5, wherein, The twisting protrusion (320) has a hexagonal prism structure.

7. The shroud for controlling the inlet air distance of an electric motor of claim 1, wherein, The fixed cover (100) is fixedly installed on the outer circumferential surface of the rear end (02) by mounting bolts (120), and the axis of the mounting bolts (120) is perpendicular to the axis of the motor.

8. The shroud for controlling the inlet air distance of an electric motor of claim 1, wherein, The movable cover (200) is an integral structure and its processing technology is sheet metal.

9. The shroud for controlling the inlet air distance of an electric motor of claim 1, wherein, The inner wall of the fixed cover (100) is provided with a sliding protrusion extending along its axial direction, and the side wall of the movable cover (200) that fits against the fixed cover (100) is provided with a sliding groove that cooperates with the sliding protrusion.

10. An electric machine characterized by Includes the fan cover for controlling the air inlet distance of the motor as described in any one of claims 1 to 9.

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