An easy-to-install permanent magnet fan

Abstract

A permanent magnet fan that is easy to install includes a volute, an inlet cover, an outlet cover, a rear cover, a mounting base, a drive unit, a first connecting assembly, a second connecting assembly, and an impeller. The front end face of the volute is provided with a first mounting plate, the top of the volute is provided with a second mounting plate, and the rear end face of the volute is provided with a limiting groove. The front end face of the first mounting plate is provided with an annular protrusion, and the annular protrusion has multiple positioning grooves. The inlet cover is detachably mounted to the first mounting plate via multiple first connecting assemblies, and the rear end face of the inlet cover is provided with multiple positioning blocks, which can be installed in the positioning grooves. The outlet cover is detachably mounted to the second mounting plate via multiple second connecting assemblies. This invention provides a permanent magnet fan that is easy to install, solving the problem that existing permanent magnet fans often use traditional bolt connections, requiring repeated adjustments of component positions to align with bolt holes during assembly, which consumes a significant amount of manual time.

Description

Technical Field

[0001] This utility model relates to the field of fan assembly technology, and in particular to a permanent magnet fan that is easy to install. Background Technology

[0002] In industrial production, equipment cooling, and environmental ventilation, permanent magnet fans have become an important replacement for traditional asynchronous motor fans due to their advantages such as high efficiency, energy saving, and excellent speed regulation performance. However, with the increasing demands for assembly efficiency and adaptability in applications such as automated production lines and precision instruments, existing permanent magnet fans are gradually revealing many problems that urgently need to be addressed in their structural design and practical use. For example, most existing permanent magnet fans use traditional bolt connections, requiring repeated adjustments of component positions to align with bolt holes during assembly, which consumes a significant amount of manual time. Utility Model Content

[0003] The purpose of this invention is to propose a permanent magnet fan that is easy to install, solving the problem that existing permanent magnet fans mostly use traditional bolt connections, requiring repeated adjustments of component positions to align with bolt holes during assembly, which not only consumes a lot of manual time.

[0004] To achieve this objective, the present invention adopts the following technical solution: An easy-to-install permanent magnet fan includes a volute, an inlet cover, an outlet cover, a rear cover, a mounting base, a drive unit, a first connecting assembly, a second connecting assembly, and an impeller. The front end face of the volute is provided with a first mounting plate, the top of the volute is provided with a second mounting plate, the rear end face of the volute is provided with a limiting groove, the front end face of the first mounting plate is provided with an annular protrusion, the annular protrusion is provided with a plurality of positioning grooves, and the plurality of positioning grooves are evenly spaced along the circumferential direction of the annular protrusion. The air inlet cover is detachably mounted to the first mounting plate via multiple first connecting components, and the rear end face of the air inlet cover is provided with multiple positioning blocks, which can be installed in the positioning groove; The air outlet cover is detachably mounted to the second mounting plate via multiple second connecting components. The rear cover is limited and mounted in the limiting groove. The front end of the drive unit is mounted on the rear cover. The bottom of the drive unit is mounted on the mounting base. The impeller is mounted on the output end of the drive unit. The impeller is located inside the volute.

[0005] Furthermore, the annular protrusion is provided with a plurality of first through holes, which are evenly spaced along the circumference of the annular protrusion. The air inlet cover is provided with a plurality of second through holes and a plurality of sleeves, which are evenly spaced along the circumference of the air inlet cover. The second through holes are directly opposite the first through holes. The first connecting component includes a pin, a limiting member, and a first elastic member; The pin is installed in the first through hole and the second through hole. The pin has a groove. The limiting member is movably installed inside the sleeve. The end of the limiting member can be placed in the groove. The limiting member has a limiting plate. The limiting plate can abut against the inner bottom surface of the sleeve. The first elastic member is fitted on the outer periphery of the limiting member. One end of the first elastic member abuts against the inner top surface of the sleeve, and the other end of the first elastic member abuts against the top surface of the limiting plate.

[0006] Specifically, the first connecting component further includes a ball bearing, which is mounted on the end of the limiting member.

[0007] Preferably, the first mounting plate is provided with a sealing groove for placing a sealing ring.

[0008] In some embodiments, the first mounting plate is provided with a first spacer groove and a second spacer groove, the first spacer groove being located between the sealing groove and the annular protrusion, and the second spacer groove being located inside the sealing groove; The air inlet cover is provided with a first embedded ring and a second embedded ring. The first embedded ring can be placed in the first spacer groove, and the second embedded ring can be placed in the second spacer groove.

[0009] Furthermore, the second connecting assembly includes a main body, a rotating component, a second elastic component, a lifting block, and a steel ball; The second mounting plate is provided with an enlarged countersunk hole, and the air outlet cover is provided with a third through hole, which is directly opposite the enlarged countersunk hole; The main body can be moved up and down and installed in the third through hole and the enlarged countersunk hole. The top of the main body is provided with a limiting block, which can abut against the top surface of the air outlet cover. The interior of the main body is provided with a sliding groove. The rotating component is rotatably mounted inside the main body, and the rotating component can move up and down along the length of the main body. One end of the second elastic component abuts against the bottom of the rotating component, and the other end of the second elastic component abuts against the top of the lifting block. The lifting block is movable up and down and installed inside the main body. The outer periphery of the bottom of the lifting block is provided with an inclined surface, and the lifting block abuts against the steel ball through the inclined surface. The steel ball is movably installed in the sliding groove, and the steel ball can protrude outward from the outside of the main body or retract inward from the inside of the main body along the length direction of the sliding groove.

[0010] Specifically, the mounting base is provided with an adjustment groove.

[0011] Compared with the prior art, one of the above technical solutions has the following beneficial effects: 1. A limiting groove is provided on the rear end face of the volute, and the rear cover plate can be directly placed in the limiting groove. Initial positioning can be completed without repeated adjustments, which greatly shortens the assembly time of the rear cover plate and the volute. At the same time, the positioning groove on the annular protrusion and the positioning block of the air inlet cover plate adopt a semi-circular structure for precise matching. There are six of both and they are evenly distributed along the circumference. This can quickly align the assembly position of the air inlet cover plate and the first mounting plate, avoiding the problem of repeated adjustments caused by alignment deviations in traditional assembly. The installation of the air inlet cover plate also does not require additional calibration. The overall assembly process is more efficient and reduces the complexity of manual operation. 2. The air inlet cover can be detachably installed on the first mounting plate via the first connecting component, and the air outlet cover can be detachably installed on the second mounting plate via the second connecting component. Compared with the traditional integrated structure, the detachable structure of the two allows users to easily replace the air inlet cover of different sizes or the air outlet cover of different sizes according to actual air volume requirements and different usage scenarios, without having to replace the entire fan body. This effectively reduces the cost of adapting the equipment to different working conditions, expands the applicable range of the fan, and meets diverse usage needs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a permanent magnet fan that is easy to install, according to one embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the rear cover plate according to one embodiment of the present utility model; Figure 3 This is a schematic diagram of the structure of the first mounting plate according to one embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the air inlet cover plate according to one embodiment of this utility model; Figure 5 This is a schematic diagram of the structure of the first connecting component according to one embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the second connecting component according to one embodiment of the present invention; The components include: volute 1, first mounting plate 11, second mounting plate 12, enlarged countersunk hole 121, limiting groove 13, annular protrusion 14, positioning groove 141, first through hole 142, sealing groove 15, first interval groove 16, second interval groove 17, air inlet cover 2, positioning block 21, second through hole 22, sleeve 23, first embedded ring 26, second embedded ring 27, air outlet cover 3, third through hole 31, rear cover 4, mounting base 5, adjusting groove 51, drive unit 6, first connecting assembly 7, pin 71, groove 711, limiting member 72, limiting plate 721, first elastic member 73, ball 74, main body 81, limiting block 811, sliding groove 812, rotating member 82, second elastic member 83, lifting block 84, inclined surface 841, and steel ball 85. Detailed Implementation

[0013] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0014] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," "inner side," "outer side," "inner end," "outer end," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish descriptive features, without any order or emphasis. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0015] In one embodiment of this utility model, such as Figure 1-6As shown, an easy-to-install permanent magnet fan includes a volute 1, an inlet cover 2, an outlet cover 3, a rear cover 4, a mounting base 5, a drive unit 6, a first connecting assembly 7, a second connecting assembly, and an impeller. The front end face of the volute 1 is provided with a first mounting plate 11, the top of the volute 1 is provided with a second mounting plate 12, the rear end face of the volute 1 is provided with a limiting groove 13, the front end face of the first mounting plate 11 is provided with an annular protrusion 14, the annular protrusion 14 is provided with multiple positioning grooves 141, and the multiple positioning grooves 141 are evenly spaced along the circumference of the annular protrusion 14. The inlet... The cover plate 2 is detachably mounted to the first mounting plate 11 via multiple first connecting components 7, and the rear end face of the air inlet cover plate 2 is provided with multiple positioning blocks 21, which can be installed in the positioning groove 141; the air outlet cover plate 3 is detachably mounted to the second mounting plate 12 via multiple second connecting components, the rear cover plate 4 is limited and mounted in the limiting groove 13, the front end of the drive unit 6 is mounted on the rear cover plate 4, the bottom of the drive unit 6 is mounted on the mounting base 5, and the output end of the drive unit 6 is equipped with the impeller, which is located inside the volute 1.In this embodiment, the drive unit 6 is an AC permanent magnet servo motor. The annular protrusion 14 has six positioning grooves 141 along its circumference. The rear end face of the air inlet cover 2 has six positioning blocks 21. Both the positioning blocks 21 and the positioning grooves 141 are semi-circular structures. During installation, the front end face of the drive unit 6 is mounted on the rear end face of the rear cover 4, so that the output shaft of the drive unit 6 passes through the rear cover 4. An impeller is installed on the output shaft of the drive unit 6. Then, the rear cover 4 is positioned in the limiting groove 13 on the rear end face of the volute 1, achieving rapid positioning. Then, it is secured with six sets of screws and nuts. Next, the air inlet cover 2 is quickly positioned on the first mounting plate 11 in front of the volute 1 using the positioning groove 141 and positioning block 21. It is then connected and installed using six first connecting components 7. Next, the air outlet cover 3 is installed on the second mounting plate 12 using four second connecting components. The detachable installation of the air inlet cover 2 and the air outlet cover 3 facilitates replacement with air inlets of different sizes and air outlets of different sizes. Finally, the mounting base 5 is installed on the bottom of the drive unit 6. This utility model... The novel design features a limiting groove 13 on the rear end face of the volute 1, allowing the rear cover 4 to be directly positioned within it. This eliminates the need for repeated adjustments, significantly reducing the assembly time between the rear cover 4 and the volute 1. Simultaneously, the positioning grooves 141 on the annular protrusion 14 and the positioning blocks 21 of the air inlet cover 2 are precisely matched using a semi-circular structure. Both have six blocks evenly distributed around the circumference, enabling rapid alignment of the air inlet cover 2 with the first mounting plate 11. This avoids the repeated adjustments caused by misalignment in traditional assembly, eliminating the need for additional calibration during the installation of the air inlet cover 2. The assembly process is more efficient, reducing the complexity of manual operation. Furthermore, the air inlet cover 2 can be detachably installed on the first mounting plate 11 via the first connecting component 7, and the air outlet cover 3 can be detachably installed on the second mounting plate 12 via the second connecting component. Compared with the traditional integrated structure, the detachable structure of the two allows users to easily replace the air inlet cover 2 of different sizes or the air outlet cover 3 of different sizes according to actual air volume requirements and different usage scenarios, without having to replace the entire fan body. This effectively reduces the cost of adapting the equipment to different working conditions, expands the applicable range of the fan, and meets diverse usage needs.

[0016] like Figure 3-5As shown, the annular protrusion 14 is provided with a plurality of first through holes 142, which are evenly spaced along the circumference of the annular protrusion 14. The air inlet cover 2 is provided with a plurality of second through holes 22 and a plurality of sleeves 23, which are evenly spaced along the circumference of the air inlet cover 2. The second through holes 22 are directly opposite the first through holes 142. The first connecting assembly 7 includes a pin 71, a limiting member 72, and a first elastic member 73. The pin 71 is installed on the first through hole 142. The sleeve 23 has a hole 142 and a second through hole 22. The pin 71 has a groove 711. The limiting member 72 is movably installed inside the sleeve 23. The end of the limiting member 72 can be placed in the groove 711. The limiting member 72 has a limiting plate 721. The limiting plate 721 can abut against the inner bottom surface of the sleeve 23. The first elastic member 73 is fitted on the outer periphery of the limiting member 72. One end of the first elastic member 73 abuts against the inner top surface of the sleeve 23, and the other end of the first elastic member 73 abuts against the top surface of the limiting plate 721. In this embodiment, the number of the first through hole 142, the second through hole 22, the sleeve 23, and the first connecting assembly 7 are all six. The six first through holes 142 are evenly spaced along the circumferential direction of the first mounting plate 11, and the six first through holes 142 are staggered with the six positioning grooves 141. The six second through holes 22 and the six sleeves 23 are evenly spaced along the circumferential direction of the second mounting plate 12, and the six second through holes 22 are staggered with the six positioning blocks 21. The six sleeves 23 are located on the outer periphery of the second mounting plate 12, and the sleeves 23 are perpendicularly connected to the second through holes 22. During installation, positioning is first achieved through the positioning blocks 21 and the positioning grooves 141. At this time, the first through hole 142 is directly opposite the second through hole 22. The first elastic element 73 is compressed and is a spring. Then, the pin 71 passes through the second through hole 22 and the first through hole 142 from front to back. After the pin 71 is inserted into place, the limiting member 72 is released. The limiting member 72 is reset under the elastic force of the first elastic element 73, so that the bottom of the limiting member 72 is placed in the groove 711, thereby achieving the purpose of fixing the pin 71 and fixing the air inlet cover 2. When disassembling, it is only necessary to lift the limiting member 72 and pull out the pin 71. The above disassembly and assembly structure is convenient and quick, and compared with the traditional screw tightening method, it greatly saves disassembly and assembly time.

[0017] like Figure 3-5As shown, the first connecting component 7 further includes a ball bearing 74, which is mounted on the end of the limiting member 72. In this embodiment, the ball bearing 74 is provided at the end of the limiting member 72. During the insertion of the pin 71, the limiting member 72 only needs to be briefly lifted to put it into a ready-to-fit state. The ball bearing 74 at the end of the limiting member 72 can abut against the outer periphery of the pin 71 and roll against the outer periphery of the pin 71 until the ball bearing 74 and the end of the limiting member 72 are placed in the groove 711. By setting the ball bearing 74, the lifting time of the limiting member 72 is reduced, eliminating the need to maintain the lifting action of the limiting member 72 throughout the process. It also reduces the probability of damage caused by rigid friction or collision between the end of the limiting member 72 and the outer periphery of the pin 71.

[0018] like Figure 3-4 As shown, the first mounting plate 11 is provided with a sealing groove 15, which is used to place a sealing ring. In this embodiment, the sealing groove 15 is provided on the front end face of the first mounting plate 11. The sealing groove 15 has an annular structure and is located inside the annular protrusion 14. A sealing ring is placed in the sealing groove 15, which helps to improve the sealing performance between the air inlet cover 2 and the first mounting plate 11 and prevent air leakage.

[0019] like Figure 3-4 As shown, the first mounting plate 11 is provided with a first spacer groove 16 and a second spacer groove 17. The first spacer groove 16 is located between the sealing groove 15 and the annular protrusion 14, and the second spacer groove 17 is located inside the sealing groove 15. The air inlet cover 2 is provided with a first embedding ring 26 and a second embedding ring 27. The first embedding ring 26 can be placed in the first spacer groove 16, and the second embedding ring 27 can be placed in the second spacer groove 17. In this embodiment, the first spacer groove 16 and the second spacer groove 17 are respectively provided on the outer and inner sides of the sealing groove 15. The first embedding ring 26 and the second embedding ring 27 are provided at corresponding positions on the rear end face of the air inlet cover 2, so that the first embedding ring 26 and the second embedding ring 27 can be embedded and installed in the first spacer groove 16 and the second spacer groove 17 respectively. This not only further improves the sealing performance between the air inlet cover 2 and the first mounting plate 11, but also makes the two more integrated.

[0020] like Figure 1-3 and Figure 6As shown, the second connecting assembly includes a main body 81, a rotating component 82, a second elastic component 83, a lifting block 84, and a steel ball 85; the second mounting plate 12 is provided with an enlarged countersunk hole 121, and the air outlet cover 3 is provided with a third through hole 31, which is directly opposite the enlarged countersunk hole 121; the main body 81 is movable up and down and is mounted on the third through hole 31 and the enlarged countersunk hole 121; the top of the main body 81 is provided with a limiting block 811, which can abut against the top surface of the air outlet cover 3; the interior of the main body 81 is provided with a sliding groove 812; the rotating component 82 is rotatably mounted inside the main body 81, and... The rotating member 82 can move up and down along the length of the main body 81. One end of the second elastic member 83 abuts against the bottom of the rotating member 82, and the other end of the second elastic member 83 abuts against the top of the lifting block 84. The lifting block 84 can be moved up and down and installed inside the main body 81. The outer periphery of the bottom of the lifting block 84 is provided with an inclined surface 841. The lifting block 84 abuts against the steel ball 85 through the inclined surface 841. The steel ball 85 can be movably installed in the sliding groove 812. The steel ball 85 can protrude outward from the outside of the main body 81 or retract inward from the inside of the main body 81 along the length of the sliding groove 812. In this embodiment, the number of the enlarged countersunk hole 121, the third through hole 31, and the second connecting assembly are four each. The second elastic element 83 is a spring. Each main body 81 has four steel balls 85 installed inside. The outer periphery of the rotating element 82 and the inner wall of the main body 81 are provided with matching threads, and the two are threadedly connected. After the air outlet cover 3 is installed on the top surface of the second mounting plate 12, the third through hole 31 is directly opposite the enlarged countersunk hole 121. Then, the bottom of the main body 81 passes through the third through hole 31 from top to bottom and extends into the enlarged countersunk hole 121 until the limiting blocks 811 on both sides of the top of the main body 81 are in contact with the air outlet. The top surface of the cover plate 3 is then rotated, and the rotating member 82 is twisted to move the rotating member 82 downward. The rotating member 82 moves the lifting block 84 downward through the second elastic member 83. Under the action of the inclined surface 841, the four steel balls 85 move outward in the sliding groove 812 and protrude out of the main body 81. The four steel balls 85 abut against the inner wall of the enlarged countersunk hole 121, so that the main body 81 cannot be removed. This achieves the purpose of installing the air outlet cover plate 3 on the second mounting plate 12. When disassembling, it is only necessary to twist the rotating member 82 in the opposite direction to make the four steel balls 85 retract into the interior of the main body 81. The disassembly and assembly are convenient, quick and efficient.

[0021] like Figure 1-2As shown, the mounting base 5 is provided with an adjustment groove 51. In this embodiment, there are four adjustment grooves 51, and each adjustment groove 51 is an oblong groove. The adjustment grooves 51 facilitate the adjustment of the installation position of the mounting base 5. Specifically, during installation, the fasteners (such as bolts) can move along the length of the adjustment groove 51. After the permanent magnet fan position is adjusted to the target position, the fasteners are then tightened to fix the mounting base 5, which is suitable for different installation scenarios.

[0022] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0023] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A permanent magnet blower for easy installation, characterized by: It includes a volute, an air inlet cover, an air outlet cover, a rear cover, a mounting base, a drive unit, a first connecting assembly, a second connecting assembly, and an impeller; The front end face of the volute is provided with a first mounting plate, the top of the volute is provided with a second mounting plate, the rear end face of the volute is provided with a limiting groove, the front end face of the first mounting plate is provided with an annular protrusion, the annular protrusion is provided with a plurality of positioning grooves, and the plurality of positioning grooves are evenly spaced along the circumferential direction of the annular protrusion. The air inlet cover is detachably mounted to the first mounting plate via multiple first connecting components, and the rear end face of the air inlet cover is provided with multiple positioning blocks, which can be installed in the positioning groove; The air outlet cover is detachably mounted to the second mounting plate via multiple second connecting components. The rear cover is limited and mounted in the limiting groove. The front end of the drive unit is mounted on the rear cover. The bottom of the drive unit is mounted on the mounting base. The impeller is mounted on the output end of the drive unit. The impeller is located inside the volute.

2. A permanent magnet windmill for easy installation according to claim 1, characterized in that: The annular protrusion is provided with a plurality of first through holes, which are evenly spaced along the circumference of the annular protrusion. The air inlet cover is provided with a plurality of second through holes and a plurality of sleeves, which are evenly spaced along the circumference of the air inlet cover. The second through holes are directly opposite the first through holes. The first connecting component includes a pin, a limiting member, and a first elastic member; The pin is installed in the first through hole and the second through hole. The pin has a groove. The limiting member is movably installed inside the sleeve. The end of the limiting member can be placed in the groove. The limiting member has a limiting plate. The limiting plate can abut against the inner bottom surface of the sleeve. The first elastic member is fitted on the outer periphery of the limiting member. One end of the first elastic member abuts against the inner top surface of the sleeve, and the other end of the first elastic member abuts against the top surface of the limiting plate.

3. A permanent magnet windmill for easy installation according to claim 2, characterized in that: The first connecting component further includes a ball bearing, which is mounted on the end of the limiting member.

4. A permanent magnet windmill for easy installation according to claim 1, characterized in that: The first mounting plate is provided with a sealing groove for placing a sealing ring.

5. A permanent magnet wind motor for easy installation according to claim 4, characterized in that: The first mounting plate is provided with a first spacer groove and a second spacer groove. The first spacer groove is located between the sealing groove and the annular protrusion, and the second spacer groove is located inside the sealing groove. The air inlet cover is provided with a first embedded ring and a second embedded ring. The first embedded ring can be placed in the first spacer groove, and the second embedded ring can be placed in the second spacer groove.

6. A permanent magnet windmill for easy installation as claimed in claim 1 wherein: The second connecting assembly includes a main body, a rotating component, a second elastic component, a lifting block, and a steel ball; The second mounting plate is provided with an enlarged countersunk hole, and the air outlet cover is provided with a third through hole, which is directly opposite the enlarged countersunk hole; The main body can be moved up and down and installed in the third through hole and the enlarged countersunk hole. The top of the main body is provided with a limiting block, which can abut against the top surface of the air outlet cover. The interior of the main body is provided with a sliding groove. The rotating component is rotatably mounted inside the main body, and the rotating component can move up and down along the length of the main body. One end of the second elastic component abuts against the bottom of the rotating component, and the other end of the second elastic component abuts against the top of the lifting block. The lifting block is movable up and down and installed inside the main body. The outer periphery of the bottom of the lifting block is provided with an inclined surface, and the lifting block abuts against the steel ball through the inclined surface. The steel ball is movably installed in the sliding groove, and the steel ball can protrude outward from the outside of the main body or retract inward from the inside of the main body along the length direction of the sliding groove.

7. A permanent magnet windmill for easy installation as claimed in claim 1 wherein: The mounting base is provided with an adjustment groove.

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