Bolt anti-loosening structure of axial flow fan
By introducing bolt anti-loosening structures into the axial flow fan, using wind force and anti-rust liquid supplement mechanisms, combined with thermal expansion materials, the bolt loosening problem is solved, and the bolt is automatically tightened and rust prevention is achieved, which extends the maintenance cycle and reduces the maintenance frequency and cost.
Patent Information
- Application Number
- CN202510381952.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2025-07-08
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing axial flow fans have high vibrations from the rotating motor and the placement plate, which leads to frequent loosening of the bolts, which require regular maintenance and tightening, and the maintenance cycle is short.
The bolt anti-loosening structure is adopted, including the bolt body, rotating parts, flow passages, fan-shaped cavity and elastic inflatable expansion parts or elastic bands. It is supplemented by wind force and anti-rust liquid, combined with thermal expansion materials, and realizes automatic tightening and anti-rust of bolts, and extends the maintenance cycle.
Effectively prevent bolts from loosening, extend the maintenance cycle of tightening bolts, simplify maintenance work, and reduce maintenance frequency and cost.
Smart Images
Figure CN120273941A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of axial fans, and more particularly to a bolt loosening prevention structure for an axial fan. Background Art
[0002] An axial fan is a fan in which the air flow direction is the same as the axis of the fan blades.
[0003] There is a conventional axial fan, which includes a wind guiding housing, a plurality of fan blades, and a placement plate. The fan blades are mounted on the rotating shaft of the rotating motor. The wind guiding housing has a wind guiding cavity. The placement plate is placed in the wind guiding cavity and fixedly connected to the wind guiding housing. The rotating motor has a base, and the base is connected to the placement plate by bolts. However, due to the relatively large volume and wind force of the axial fan, the vibration at the rotating motor and the placement plate is relatively large, and the bolts may gradually rotate and loosen under the vibration. Equipment maintenance personnel need to regularly maintain and tighten the bolts.
[0004] Therefore, there is a need to provide a bolt loosening prevention structure for an axial fan that can effectively prevent the bolts from loosening and extend the maintenance cycle of tightening the bolts. Summary of the Invention
[0005] The main purpose of this application is to provide a bolt loosening prevention structure for an axial flow fan, which is used to fix a rotating motor on the axial flow fan. The axial flow fan includes a wind guiding housing, a plurality of fan blades and a placement plate. The fan blades are installed on the rotating shaft of the rotating motor. The wind guiding housing has a wind guiding cavity. The placement plate is placed in the wind guiding cavity and fixedly connected to the wind guiding housing. The rotating motor has a base. The base is connected to the placement plate through the bolt loosening prevention structure of the axial flow fan. Among them, a plurality of first threaded holes corresponding to each other are provided on the base and the placement plate. The placement plate also has a plurality of wind receiving channels and an air inlet channel. The bottom of each first threaded hole on the placement plate is communicated with a corresponding wind receiving channel. The two ends of the air inlet channel are respectively communicated with the wind guiding cavity and a wind receiving channel. The bolt loosening prevention structure of the axial flow fan includes a plurality of bolt bodies and a plurality of rotating parts. Each bolt body has a spiral air guiding part, a liquid flow channel, a rotating cavity, a sector cavity and a plurality of liquid discharge ports. The bolt body is successively screwed into the first threaded holes on the base and the placement plate. The spiral air guiding part is arranged at the top of the bolt body. There is an anti-rust liquid in the liquid flow channel. The two ends of the rotating cavity are respectively communicated with the liquid flow channel and the sector cavity. The liquid discharge port is communicated with the first threaded hole. A rotating part is rotatably installed in each rotating cavity. The rotating part has an intermediate flow channel and an extending end. The extending end extends into the sector cavity. One end of the rotating part extends into the wind receiving channel. A wind blade is provided at the end of the rotating part extending into the wind receiving channel. When the rotating part rotates a predetermined angle, the two ends of the intermediate flow channel are respectively communicated with the liquid flow channel and the liquid discharge port. By the action of wind force on the spiral air guiding part, after the spiral air guiding part is stressed, a tightening force is applied to the threaded body. By setting the rotating part, it is realized that the first threaded hole is supplemented with anti-rust liquid once when the axial flow fan starts and stops. Subsequently, a tightening force is applied to the bolt body by the rotating part. Compared with the prior art, this application has the advantages of an axial flow fan that can effectively prevent the bolts from loosening and extend the maintenance cycle of the tightened bolts.
[0006] Another object of the present application is to provide a bolt loosening prevention structure for an axial flow fan. Among them, the bolt loosening prevention structure of the axial flow fan further includes a spring and an elastic inflatable expansion member with an air inlet. The two ends of the spring are respectively connected to the rotating member and the placement plate. The side wall of the fan-shaped cavity has a receiving groove, one end of the receiving groove extends to the wind receiving channel, the elastic inflatable expansion member is placed in the receiving groove, and the air inlet of the elastic inflatable expansion member faces the wind receiving channel. When the wind receiving channel admits air, the wind blades are affected by the wind force and drive the rotating member to rotate, and the extension end rotates from one end of the fan-shaped cavity to abut against the other end. At this time, the air inlet of the elastic inflatable expansion member admits air and the elastic inflatable expansion member extends into the fan-shaped cavity and abuts against the extension end. The rotating member is reset by the spring, and the torsion of the spring is offset by the elastic inflatable expansion member under certain conditions.
[0007] Another object of the present application is to provide a bolt loosening prevention structure for an axial flow fan. Among them, the bolt loosening prevention structure of the axial flow fan further includes an elastic band, the material of the elastic band is silicone rubber, and the two ends of the elastic band are respectively connected to the rotating member and the placement plate. The reset of the rotating member and the offset of the tension under certain conditions are realized by using the thermal expansion rate of the elastic band.
[0008] In order to achieve at least one of the above invention objects, the present application provides a bolt loosening prevention structure for an axial flow fan, which is used to fix a rotating motor on the axial flow fan. The axial flow fan includes a wind guiding housing, a plurality of fan blades and a placement plate. The fan blades are installed on the rotating shaft of the rotating motor. The wind guiding housing has a wind guiding cavity. The placement plate is placed in the wind guiding cavity and fixedly connected to the wind guiding housing. The rotating motor has a base, and the base is connected to the placement plate through the bolt loosening prevention structure of the axial flow fan, where:
[0009] The base and the placement plate have a plurality of corresponding first threaded holes. The placement plate also has a plurality of wind receiving channels and an air inlet channel. The bottom of each of the first threaded holes on the placement plate communicates with a corresponding one of the wind receiving channels. The two ends of the air inlet channel communicate with the wind guiding cavity and one of the wind receiving channels respectively;
[0010] The bolt loosening prevention structure of the axial flow fan includes
[0011] A plurality of bolt bodies, each bolt body has a spiral air guiding member, a liquid flow channel, a rotating cavity, a fan-shaped cavity and a plurality of liquid discharge ports. The bolt bodies are successively screwed into the first threaded holes on the base and the placement plate, and the spiral air guiding member is arranged at the top of the bolt body. The liquid flow channel contains an anti-rust liquid. The two ends of the rotating cavity communicate with the liquid flow channel and the fan-shaped cavity respectively. The liquid discharge ports communicate with the first threaded holes; and
[0012] A plurality of rotating members, each of the rotating members is rotatably installed in one of the rotating cavities. Each rotating member has an intermediate flow channel and an extending end. The extending end extends into the fan-shaped cavity. One end of the rotating member extends into the wind receiving channel, and a wind blade is provided at the end of the rotating member extending into the wind receiving channel. When the rotating member rotates by a predetermined angle, the two ends of the intermediate flow channel are respectively communicated with the liquid flow channel and the liquid discharge port.
[0013] In one or more embodiments of the present application, the bolt loosening prevention structure of the axial flow fan further includes a spring and an elastic inflatable expansion member having an air inlet. The two ends of the spring are respectively connected to the rotating member and the placement plate. The side wall of the fan-shaped cavity has a receiving groove, one end of the receiving groove extends to the wind receiving channel, the elastic inflatable expansion member is placed in the receiving groove, and the air inlet of the elastic inflatable expansion member faces the wind receiving channel. When the wind receiving channel admits air, the wind blade is acted on by the wind force and drives the rotating member to rotate, and the extending end rotates from one end of the fan-shaped cavity to abut against the other end. At this time, the air inlet of the elastic inflatable expansion member admits air and the elastic inflatable expansion member extends into the fan-shaped cavity and abuts against the extending end.
[0014] In one or more embodiments of the present application, the bolt loosening prevention structure of the axial flow fan further includes an elastic band. The material of the elastic band is silicone rubber. The two ends of the elastic band are respectively connected to the rotating member and the placement plate.
[0015] In one or more embodiments of the present application, the bolt loosening prevention structure of the axial flow fan further includes a heat conduction structure. The two ends of the heat conduction structure respectively abut against the elastic band and the rotating motor.
[0016] In one or more embodiments of the present application, the bottom of each bolt body has a plurality of card slots. The side wall of the first threaded hole near the wind receiving channel has a placement groove, and a thermal bimetal sheet is provided in the placement groove. When the thermal bimetal sheet is deformed by heat, the thermal bimetal sheet contacts the threaded surface of the bolt body or is inserted into the card slots.
[0017] In one or more embodiments of the present application, each wind receiving channel is communicated with another adjacent wind receiving channel, and one of the wind receiving channels at the end is communicated with the air guiding cavity.
[0018] In one or more embodiments of the present application, the liquid flow channel includes a cylindrical cavity and a spiral cavity. The cylindrical cavity is located above the spiral cavity, and a sliding plug is provided in the cylindrical cavity. The sliding plug divides the cylindrical cavity into a first chamber and a second chamber. The second chamber is communicated with the spiral cavity, and the anti-rust liquid is provided in both the second chamber and the spiral cavity. The first chamber is communicated with the air guiding cavity.
[0019] In one or more embodiments of the present application, a flared air collecting cylinder is provided at one end of the air inlet channel close to the air guiding cavity.
[0020] In an embodiment of the present application, it is used to fix a rotating motor on an axial flow fan. The axial flow fan includes an air guiding housing, a plurality of fan blades and a placement plate. The fan blades are installed on the rotating shaft of the rotating motor. The air guiding housing has an air guiding cavity. The placement plate is placed in the air guiding cavity and fixedly connected to the air guiding housing. The rotating motor has a base. The base is connected to the placement plate through the bolt anti-loosening structure of the axial flow fan. Among them, a plurality of first threaded holes corresponding to each other are provided on the base and the placement plate. The placement plate also has a plurality of air receiving channels and an air inlet channel. The bottom of each first threaded hole on the placement plate is communicated with a corresponding air receiving channel. The two ends of the air inlet channel are respectively communicated with the air guiding cavity and an air receiving channel. The bolt anti-loosening structure of the axial flow fan includes a plurality of bolt bodies and a plurality of rotating parts. Each bolt body has a spiral air guiding part, a liquid flow channel, a rotating cavity, a fan-shaped cavity and a plurality of liquid discharge ports. The bolt bodies are successively screwed into the first threaded holes on the base and the placement plate, and the spiral air guiding part is provided at the top of the bolt body. The anti-rust liquid is provided in the liquid flow channel. The two ends of the rotating cavity are respectively communicated with the liquid flow channel and the fan-shaped cavity. The liquid discharge port is communicated with the first threaded hole. A rotating part is rotatably installed in each rotating cavity. The rotating part has an intermediate flow channel and an extending end. The extending end extends into the fan-shaped cavity. One end of the rotating part extends into the air receiving channel, and a wind blade is provided at the end of the rotating part extending into the air receiving channel. When the rotating part rotates by a predetermined angle, the two ends of the intermediate flow channel are respectively communicated with the liquid flow channel and the liquid discharge port. By the action of wind force on the spiral air guiding part, after the spiral air guiding part is stressed, a tightening force is applied to the threaded body. By setting the rotating part, it is realized that the first threaded hole is supplemented with anti-rust liquid once when the axial flow fan starts and stops. Subsequently, a tightening force is applied to the bolt body by the rotating part. Compared with the prior art, the present application has the advantage of an axial flow fan that can effectively prevent the bolts from loosening and extend the maintenance period of the tightened bolts. Description of the Drawings
[0021] From the following detailed description of the embodiments of the present application in conjunction with the drawings, these and / or other aspects and advantages of the present application will become clearer and easier to understand, where:
[0022] Figure 1The figure shows a schematic diagram of the bolt loosening prevention structure of an axial flow fan installed on the axial flow fan from a certain perspective;
[0023] Figure 2 The figure shows a schematic diagram of the bolt loosening prevention structure of an axial flow fan installed on the axial flow fan from another perspective;
[0024] Figure 3 The figure shows a schematic diagram of the bolt loosening prevention structure of an axial flow fan of the present application installed on a placement plate;
[0025] Figure 4 The figure shows a schematic diagram of the bolt loosening prevention structure of an axial flow fan of the present application;
[0026] Figure 5 The figure shows Figure 4 a partial enlarged view of part C;
[0027] Figure 6 The figure shows Figure 4 a partial enlarged view of section D-D;
[0028] Figure 7 The figure shows Figure 4 a partial enlarged view of part E. Detailed implementation manners
[0029] The terms and words used in the following description and claims are not limited to the literal meanings, but are used by the inventor only to enable a clear and consistent understanding of the present application. Therefore, it is obvious to those skilled in the art that the following description of various embodiments of the present application is provided only for the purpose of illustration and not for the purpose of limiting the present application as defined by the appended claims and their equivalents.
[0030] It can be understood that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in other embodiments, the number of the element can be multiple. The term "a" cannot be understood as a limitation on the number.
[0031] Although ordinal numbers such as "first", "second", etc. will be used to describe various components, those components are not limited herein. The term is only used to distinguish one component from another. For example, the first component can be called the second component, and similarly, the second component can also be called the first component without departing from the teachings of the inventive concept. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.
[0032] The terms used herein are for the purpose of describing various embodiments only and are not intended to be limiting. As used herein, the singular forms are also intended to include the plural forms unless the context clearly indicates otherwise. Additionally, it will be understood that the terms "comprises" and / or "having", when used in this specification, specify the presence of the stated features, numbers, steps, operations, components, elements, or combinations thereof, without precluding the presence or addition of one or more other features, numbers, steps, operations, components, elements, or combinations thereof.
[0033] The bolt loosening prevention structure of a schematic axial flow fan, refer to Figures 1 to 7 , according to a bolt loosening prevention structure of an axial flow fan in any preferred embodiment of the present invention, refer to Figure 1 and Figure 2 , for fixing a rotating motor 90 on the axial flow fan. The axial flow fan includes a wind guiding housing 91, a plurality of fan blades 92, and a placement plate 93. The fan blades 92 are installed on the rotating shaft of the rotating motor 90. The wind guiding housing 91 has a wind guiding cavity 911. The placement plate 93 is placed in the wind guiding cavity 911 and fixedly connected to the wind guiding housing 91. The rotating motor 90 has a base 901. The base 901 is connected to the placement plate 93 through the bolt loosening prevention structure of the axial flow fan.
[0034] Specifically, in any embodiment of the present application, the base 901 and the placement plate 93 have a plurality of corresponding first threaded holes 931. The bolt loosening prevention structure of the axial flow fan includes a plurality of bolt bodies 10. Each bolt body 10 has a spiral air guiding member 101. The bolt bodies 10 are successively screwed into the first threaded holes 931 on the base 901 and the placement plate 93, and the spiral air guiding member 101 is arranged at the top of the bolt body 10.
[0035] It should be noted that the spiral air guiding member 101 has a spiral surface. After the spiral surface is subjected to the acting force of the wind blowing along the wind guiding cavity 911 after the fan blades 92 rotate, the spiral surface receives an acting force that urges the bolt body 10 to rotate in the bolt tightening direction, thereby partially offsetting the acting force of the bolt body 10 loosening under vibration, effectively delaying the time for the bolt body 10 to unscrew from the first threaded hole 931 under vibration.
[0036] In addition, in any embodiment of the present application, as Figure 3As shown, the placement plate 93 further has a plurality of wind-receiving channels 932 and an air inlet channel 933. The bottom of each of the first threaded holes 931 on the placement plate 93 is communicated with a corresponding wind-receiving channel 932. The two ends of the air inlet channel 933 are respectively communicated with the air guide cavity 911 and a wind-receiving channel 932. The bolt loosening prevention structure of the axial flow fan further includes a plurality of rotating members 20. One end of the rotating member 20 extends into the wind-receiving channel 932, and a wind blade 201 is provided at the end of the rotating member 20 extending into the wind-receiving channel 932.
[0037] It should be noted that when the flowing air blows into the air inlet channel 933 and acts on the wind blade 201, the rotation direction of the wind blade 201 is the same as the tightening direction of the bolt body 10. In view of this, the wind blade 201 will provide a force to promote the tightening of the bolt body 10 under the action of the wind force, further delaying the time for the bolt body 10 to unscrew from the first threaded hole 931 under vibration. In addition, there will be a wind force acting on the bottom end face of the bolt body 10, causing the bolt body 10 to receive an upward force, making the external thread on the bolt body 10 closely fit with the internal thread in the first threaded hole 931, increasing the friction force, and helping the bolt body 10 to maintain the tightened state.
[0038] However, due to the connection gap existing at the threaded connection between the bolt body 10 and the first threaded hole 931, when the wind blows into this gap, it is easy to dry up the rust preventive liquid at the connection between the bolt body 10 and the first threaded hole 931.
[0039] In view of this, in any embodiment of the present application, as Figures 4 to 7 , each bolt body 10 further has a liquid flow channel 102, a rotating cavity 103, a sector cavity 104 and a plurality of liquid discharge ports 105. The liquid flow channel 102 contains rust preventive liquid. The two ends of the rotating cavity 103 are respectively communicated with the liquid flow channel 102 and the sector cavity 104. The liquid discharge port 105 is communicated with the first threaded hole 931; in addition, a rotating member 20 is rotatably installed in each rotating cavity 103. The rotating member 20 has an intermediate flow channel 202 and an extension end 203. The extension end 203 extends into the sector cavity 104. When the rotating member 20 rotates a predetermined angle, the two ends of the intermediate flow channel 202 are respectively communicated with the liquid flow channel 102 and the liquid discharge port 105.
[0040] It should be noted that by providing the rotating cavity 103, when the wind blades 201 on the rotating member 20 are affected by wind force, the rotating member 20 will be driven to rotate circumferentially. By providing the fan-shaped cavity 104 and the extension end 203, the rotating member 20 is in a rotatable state in the initial state, that is, the rotating member 20 can rotate circumferentially independently relative to the bolt body 10 under the action of wind force. When the extension end 203 rotates from one side wall of the fan-shaped cavity 104 to abut against the other side wall of the fan-shaped cavity 104, at this time, the circumferential rotational force of the rotating member 20 under the action of wind force will be transmitted to the bolt body 10 along the extension end 203, and the above-mentioned force that promotes the tightening of the bolt body 10 is provided, further delaying the time for the bolt body 10 to unscrew from the first threaded hole 931 under vibration. It should also be emphasized that during the process of the extension end 203 rotating from one side wall of the fan-shaped cavity 104 to the other side wall, the two ends of the intermediate flow channel 202 are respectively communicated with the liquid flow channel 102 and the drain port 105 at a certain moment, and the anti-rust liquid placed in the liquid flow channel 102 is discharged from the drain port 105 along the intermediate flow channel 202 and acts between the bolt body 10 and the first threaded hole 931, preventing the connection between the bolt body 10 and the first threaded hole 931 from being dry and exacerbating the wear of the bolt body 10. That is, one of the functions of the rotating member 20 is to provide a tightening force for the bolt body 10 after being affected by wind force, and another function of the rotating member 20 is to supplement the anti-rust liquid for the rotating member 20 every time the axial flow fan is started and stopped. Obviously, compared with the prior art, the present application has the advantages of effectively preventing bolt loosening and prolonging the tightening of bolts.
[0041] Further, in the first embodiment of the present application, to enable the rotating member 20 to reset to abut against one side wall of the fan-shaped cavity 104 after the rotation shaft of the rotating motor 90 stops rotating, and, after the axial flow fan operates for a predetermined time, to offset the torque that promotes the reset of the rotating member 20, such as Figure 5 and Figure 6As shown, the bolt loosening prevention structure of the axial flow fan further includes a spring 301 and an elastic inflatable expansion member 302 having an air inlet. The elastic inflatable expansion member 302 is preferably a rod-shaped balloon. The two ends of the spring 301 are respectively connected to the rotating member 20 and the placement plate 93. The side wall of the fan-shaped cavity 104 has a receiving groove (not marked in the figure). One end of the receiving groove extends to the wind receiving channel 932. The elastic inflatable expansion member 302 is placed in the receiving groove, and the air inlet of the elastic inflatable expansion member 302 faces the wind receiving channel 932. When the wind receiving channel 932 admits air, the wind blades 201 are affected by the wind force and drive the rotating member 20 to rotate, and the extension end 203 rotates from one side wall of the fan-shaped cavity 104 to abut against the other side wall. At this time, the air inlet of the elastic inflatable expansion member 302 admits air and the elastic inflatable expansion member 302 extends into the fan-shaped cavity 104 and abuts against the extension end 203, and the pressure exerted by the elastic inflatable expansion member 302 on the extension end 203 is equal to or greater than the torque of the spring 301 at this time.
[0042] It should be noted that when the spring 301 is in an undeformed state, the extension end 203 abuts against one side wall of the fan-shaped cavity 104. When the wind surges into the air inlet channel 933 and acts on the wind blades 201, it drives the rotating member 20 to overcome the torque of the spring 301 and abut against the other side wall of the fan-shaped cavity 104. At this time, the force driving the bolt body 10 to tighten is relatively small because it needs to overcome the torque of the spring 301. As the wind continuously surges into the air inlet channel 933, a part of the wind blows into the air inlet of the elastic inflatable expansion member 302 and inflates the elastic inflatable expansion member 302. At this time, the elastic inflatable expansion member 302 expands after being filled with air and extends into the fan-shaped cavity 104 and just abuts against the other side wall of the extension end 203. At this time, the elastic inflatable expansion member 302 provides a abutting force to limit the rotation of the rotating member 20 in the reset direction. Since the pressure exerted by the elastic inflatable expansion member 302 on the extension end 203 is equal to or greater than the torque of the spring 301 at this time, the torque of the spring 301 at this time is offset by the pressure exerted by the elastic inflatable expansion member 302 on the extension end 203, thereby enabling the rotating member 20 to completely provide a tightening force for the bolt body 10. In addition, when the axial flow fan stops working, since air no longer continuously surges into the air inlet channel 933, the gas inside the elastic inflatable expansion member 302 gradually dissipates, and the elastic inflatable expansion member 302 returns to its initial deflated state. At the same time, since the rotating member 20 is no longer subjected to a rotational force under the action of the wind at this time, the torque of the spring 301 will drive the rotating member 20 to rotate a predetermined angle and reset the extension end 203.
[0043] Furthermore, in the second embodiment of the present application, the bolt loosening prevention structure of the axial flow fan further includes an elastic band (not marked in the figure). The elastic band is made of silicone rubber, and both ends of the elastic band are respectively connected to the rotating member 20 and the placement plate 93.
[0044] It should be noted that in the second embodiment, the elastic band made of silicone rubber replaces the spring 301 and the elastic inflatable expansion member 302. Specifically, the elastic band itself has a certain elasticity at normal temperature. When the axial flow fan starts to work, when the rotating member 20 rotates a predetermined angle under the action of wind force and abuts against the side wall of the fan-shaped cavity 104, the rotating member 20 needs to overcome the pulling force when the elastic band is stretched. After the axial flow fan works for a period of time, a part of the heat energy at the rotating motor 90 is transferred to the elastic band. Since silicone rubber has good ductility and thermal expansion rate above 40°C, at this time, the overall length of the elastic band becomes longer, thereby reducing the pulling force of the elastic band on the rotating member 20, or even having no pulling force; and after the axial flow fan stops working for a predetermined time, the temperature on the placement plate 93 drops, causing the elastic band to contract to its initial state, driving the rotating member 20 to rotate a predetermined angle, and resetting the extension end 203.
[0045] In addition, to facilitate the thermal expansion and elongation of the elastic band 301 after the axial flow motor works for a predetermined time, the bolt loosening prevention structure of the axial flow fan further includes a heat conduction structure (not marked in the figure). Both ends of the heat conduction structure are respectively in contact with the elastic band and the rotating motor. It should be noted that the heat conduction structure is preferably a heat conduction copper sheet. After one end of the heat conduction copper sheet extends into the rotating motor housing, one end of the heat conduction copper sheet is fixed to the rotating motor by welding. In addition, the other end of the heat conduction copper sheet penetrates through the base 901 and the placement plate 93 and is in contact with the corresponding elastic band. The other end of the heat conduction copper sheet is also welded to the base 901 by welding. When the rotating motor works for a predetermined time, part of the heat generated when the rotating motor coil is energized is transferred to the elastic band through the heat conduction copper sheet, causing it to expand and elongate due to heat.
[0046] Furthermore, to further prevent the bolt body 10 from loosening, in any embodiment of the present application, as Figure 5 shown, each bottom of the bolt body 10 has a plurality of card slots 106. One side wall of the first threaded hole 931 near the wind receiving channel 932 has a placement groove (not marked in the figure). A thermal bimetal 50 is provided in the placement groove. When the thermal bimetal 50 deforms due to heat, the thermal bimetal 50 contacts the threaded surface of the bolt body 10 or is inserted into the card slot 106.
[0047] It should be noted that when the external air temperature is relatively high and the rotary motor 90 has been operating for a long time, the thermal bimetal sheet 50 is deformed by heat and protrudes a predetermined distance in the direction of the central axis of the bolt body 10. When the bolt body 10 rotates to a predetermined angle, the thermal bimetal sheet 50 is snapped into the card slot 106 to prevent the bolt body 10 from further rotation.
[0048] Furthermore, in order to ensure that the wind flowing in from the air inlet channel 933 will finally flow back to the air guiding cavity 911. In any embodiment of the present application, referring to Figure 2 and Figure 3 , each air receiving channel 932 communicates with another adjacent air receiving channel 932, and one air receiving channel 932 at the end communicates with the air guiding cavity 911.
[0049] Furthermore, in any embodiment of the present application, as Figure 7 shown, the liquid flow channel 102 includes a cylindrical cavity 1021 and a spiral cavity 1022. The cylindrical cavity 1021 is located above the spiral cavity 1022, and a sliding plug 1023 is provided in the cylindrical cavity 1021. The sliding plug 1023 divides the cylindrical cavity 1021 into a first chamber 1024 and a second chamber. The second chamber communicates with the spiral cavity 1022, and anti-rust liquid is provided in both the second chamber and the spiral cavity 1022. The first chamber 1024 communicates with the air guiding cavity 911.
[0050] It should be noted that when the wind flows into the first chamber 1024, a downward pressure will be provided to the sliding plug 1023 and transmitted to the anti-rust liquid, so that when both ends of the intermediate channel communicate with the liquid flow channel 102 and the drain port 105 respectively, the anti-rust liquid can quickly flow into the intermediate channel.
[0051] Furthermore, in any embodiment of the present application, as Figure 7 shown, one end of the second chamber close to the spiral cavity 1022 has an enlarged hole end 1025. Both the top and bottom of the sliding plug 1023 have a material removal part 10231. It should be noted that when there is no anti-rust liquid in the second chamber, the air flowing into the first chamber 1024 can pass through the enlarged hole end 1025 along the space vacated by the material removal part 10231 and provide a downward acting force on the anti-rust liquid placed in the spiral cavity 1022. When the anti-rust liquid is used up, this wind force will also apply a downward pressure on the top end face of the rotating part 20.
[0052] Furthermore, in any embodiment of the present application, as Figure 3As shown, one end of the air inlet channel 933 close to the air guide cavity 911 is provided with a flared air collecting cylinder 9331. By providing the flared air collecting cylinder 9331, it is convenient for a part of the air to flow into the air inlet channel 933.
[0053] In summary, the bolt loosening prevention structure of the axial flow fan based on the embodiment of the present application is clarified, which provides advantages such as effectively preventing bolt loosening and extending the maintenance cycle of the tightened bolts for the bolt loosening prevention structure of the axial flow fan.
[0054] It is worth mentioning that in the embodiment of the present application, the bolt loosening prevention structure of the axial flow fan has a simple structure, does not involve complex manufacturing processes and expensive materials, and has high economy. At the same time, for manufacturers, the bolt loosening prevention structure of the axial flow fan provided by the present application is easy to produce and has low costs, which is more conducive to controlling production costs and further conducive to the promotion and use of products.
[0055] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the drawings are only examples and do not limit the present invention. The object of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and described in the embodiments, and without departing from this principle, the embodiments of the present invention can have any deformation or modification.
Claims
1. A bolt loosening prevention structure for an axial flow fan, which is used to fix a rotating motor on the axial flow fan. The axial flow fan includes a wind guiding housing, a plurality of fan blades and a placement plate. The fan blades are installed on the rotating shaft of the rotating motor. The wind guiding housing has a wind guiding cavity. The placement plate is placed in the wind guiding cavity and fixedly connected to the wind guiding housing. The rotating motor has a base, and the base is connected to the placement plate through the bolt loosening prevention structure of the axial flow fan. It is characterized in that: The base and the placement plate are provided with a plurality of first threaded holes corresponding to each other. The placement plate also has a plurality of wind receiving channels and an air inlet channel. The bottom of each first threaded hole on the placement plate is communicated with a corresponding wind receiving channel. The two ends of the air inlet channel are respectively communicated with the wind guiding cavity and a wind receiving channel; The bolt loosening prevention structure of the axial flow fan includes A plurality of bolt bodies. Each bolt body is provided with a spiral air guiding member, a liquid flow channel, a rotating cavity, a fan-shaped cavity and a plurality of liquid discharge ports. The bolt bodies are successively screwed into the first threaded holes on the base and the placement plate, and the spiral air guiding member is arranged at the top of the bolt body. The liquid flow channel is filled with anti-rust liquid. The two ends of the rotating cavity are respectively communicated with the liquid flow channel and the fan-shaped cavity. The liquid discharge ports are communicated with the first threaded holes; and A plurality of rotating members. Each rotating cavity is rotatably installed with a rotating member. The rotating member has an intermediate flow channel and an extending end. The extending end extends into the fan-shaped cavity. One end of the rotating member extends into the wind receiving channel, and a wind blade is arranged at the end of the rotating member extending into the wind receiving channel. When the rotating member rotates a predetermined angle, the two ends of the intermediate flow channel are respectively communicated with the liquid flow channel and the liquid discharge port.
2. The bolt loosening prevention structure of the axial flow fan according to claim 1, characterized in that: The bottom of each bolt body is provided with a plurality of card slots. The side wall of the first threaded hole near the wind receiving channel is provided with a placement groove, and a thermal bimetal sheet is arranged in the placement groove. When the thermal bimetal sheet is deformed by heat, the thermal bimetal sheet contacts the threaded surface of the bolt body or is clamped into the card slots.
3. The bolt loosening prevention structure of the axial flow fan according to claim 2, characterized in that: Each wind receiving channel is communicated with another adjacent wind receiving channel, and the wind receiving channel at the end is communicated with the wind guiding cavity.
4. The bolt loosening prevention structure of the axial flow fan according to claim 3, characterized in that: The liquid flow channel includes a cylindrical cavity and a spiral cavity. The cylindrical cavity is located above the spiral cavity, and a sliding plug is arranged in the cylindrical cavity. The sliding plug divides the cylindrical cavity into a first chamber and a second chamber. The second chamber is communicated with the spiral cavity, and anti-rust liquid is arranged in both the second chamber and the spiral cavity. The first chamber is communicated with the wind guiding cavity.
5. The bolt loosening prevention structure of the axial flow fan according to claim 4, characterized in that: One end of the air inlet channel near the wind guiding cavity is provided with a flared air collecting cylinder.
6. The bolt loosening prevention structure of the axial flow fan according to any one of claims 1-5, characterized in that: The bolt loosening prevention structure of the axial flow fan further includes a spring. The two ends of the spring are respectively connected to the rotating member and the placement plate.
7. The bolt loosening prevention structure of the axial flow fan according to claim 6, characterized in that: The bolt loosening prevention structure of the axial flow fan further includes an elastic inflatable expansion member having an air inlet. The side wall of the fan-shaped cavity has a receiving groove, and one end of the receiving groove extends to the wind receiving channel. The elastic inflatable expansion member is placed in the receiving groove, and the air inlet of the elastic inflatable expansion member faces the wind receiving channel. When the wind receiving channel admits air, the wind blades are affected by the wind force and drive the rotating member to rotate, and the extending end rotates from one end of the fan-shaped cavity to abut against the other end. At this time, the air inlet of the elastic inflatable expansion member admits air and the elastic inflatable expansion member extends into the fan-shaped cavity and abuts against the extending end.
8. The bolt loosening prevention structure of the axial flow fan according to any one of claims 1-5, characterized in that: The bolt loosening prevention structure of the axial flow fan further includes an elastic band, the material of the elastic band is silicone rubber, and the two ends of the elastic band are respectively connected to the rotating member and the placement plate.
9. The bolt loosening prevention structure of the axial flow fan according to claim 8, characterized in that: The bolt loosening prevention structure of the axial flow fan further includes a heat conduction structure, and the two ends of the heat conduction structure respectively abut against the elastic band and the rotary motor.