Brazing device for hardware machining

Abstract

The invention relates to the technical field of brazing, and discloses a brazing device for hardware machining, the brazing device comprises a rotary table, a supporting batten, a clamping mechanism and a welding gun, an adjusting mechanism for adjusting the angle of the clamping mechanism is arranged on the supporting batten, the adjusting mechanism comprises a suspension table, and the clamping mechanism is detachably connected to the suspension table; the number of the rotating circular plates is three, the axes of the rotating circular plates are collinear, and each rotating circular plate is fixedly provided with a horizontally-arranged extension rod; one end of each bending connecting rod is hinged to the corresponding hinge joint, the other end of each bending connecting rod is hinged to the side edge of the suspension table, and three hinge points between the three bending connecting rods and the suspension table are distributed at equal intervals; the supporting table is installed at the end of the supporting strip plate and used for supporting the three rotating circular plates to be collinear in axis and rotate respectively; and the three driving assemblies are used for driving the three rotating circular plates to rotate correspondingly. Multi-degree-of-freedom accurate positioning of base metal is achieved, efficient cooling is achieved through movement of the rotary disc after welding, and therefore the production efficiency and the product quality are remarkably improved.

Description

Technical Field

[0001] The present application relates to the field of brazing technology, and in particular to a brazing device for hardware processing. Background Art

[0002] In the field of precision machining of hardware, brazing technology has become a key technology for connecting metal parts due to its advantages such as small heat-affected zone and high connection strength. As an important branch of brazing, flame brazing has a typical equipment configuration including core modules such as gas supply unit, welding gun assembly, rotary table and basic clamping device. Existing technical solutions mostly adopt a circular array layout, which realizes continuous operation through an intermittent rotating turntable driven by a motor and fixed workstations evenly distributed around the periphery.

[0003] However, this traditional architecture has significant technical limitations: first, the rigidly fixed clamping mechanism cannot adapt to workpieces with complex geometric features. When welding special-shaped parts or welding at multiple angles, the lack of spatial posture adjustment often leads to process defects such as uneven temperature distribution in the heating area and poor wettability of the solder; second, the post-welding cooling link relies on passive heat dissipation or external cooling devices, which not only prolongs the production cycle, but also easily causes workpiece deformation or residual stress problems due to inconsistent cooling rates. These technical bottlenecks have seriously restricted the mass production qualification rate and production efficiency of high-precision hardware, and urgently need to be broken through through equipment innovation. Summary of the invention

[0004] The present application provides a brazing device for hardware processing, which solves the technical problem that the brazing device in the prior art usually uses a fixed clamping mechanism to fix the base material and cannot achieve multi-degree-of-freedom adjustment. It achieves multi-degree-of-freedom precise positioning of the base material and uses the turntable movement to achieve efficient cooling after welding, thereby significantly improving production efficiency and product quality.

[0005] The present application provides a brazing device for hardware processing, comprising a turntable rotatably arranged in a water tank, a plurality of support strips fixed along a circle of the turntable, and a clamping mechanism fixedly installed on the support strips, wherein a welding gun is arranged outside the turntable, the clamping mechanism is used to clamp a parent material to be welded, and an adjustment mechanism for adjusting the angle of the clamping mechanism is arranged on the support strips, wherein the adjustment mechanism comprises: a suspension platform, located above the support strips, and the clamping mechanism is detachably connected to the suspension platform; a rotating circular plate, horizontally arranged and located below the suspension platform, the rotating circular plates are arranged with three and their axes are colinear, and each rotating circular plate is fixed with a horizontally arranged extension rod A hinge joint is provided at one end of the extension rod away from the rotating circular plate; a bending connecting rod, one end of which is hinged to the hinge joint, and the other end is hinged to the side of the suspension platform, and the three hinge points between the three bending connecting rods and the suspension platform are equidistantly distributed, the hinge axis between the bending connecting rod and the hinge joint is inclined, and the extension line of the top end of the hinge axis passes through the axis of the suspension platform, and the hinge axis between the bending connecting rod and the suspension platform is horizontal and passes through the center of the suspension platform; a support platform is installed at the end of the supporting strip, and the support platform is used to support the three rotating circular plates to be colinear and rotate separately; a driving assembly is provided with three groups and is used to drive the three rotating circular plates to rotate respectively.

[0006] Furthermore, the support platform includes: a base plate, horizontally arranged and fixed to the end of the supporting strip; a rotating shaft rod, vertically rotatably arranged on the base plate, a rotating circular plate fixed to the top of the rotating shaft rod; a rotating cylinder, sleeved on the outside of the rotating shaft rod, and a bearing 1 is arranged between the inner wall of the rotating cylinder and the rotating shaft rod, the outer wall of the rotating cylinder is located above the bearing 1 and sleeved with a bearing 2, the top of the rotating cylinder is located below the top of the rotating shaft rod, a second rotating circular plate is fixed on the outer wall of the top of the rotating cylinder, and a third rotating circular plate is located below the second rotating circular plate, and the third rotating circular plate is fixedly connected to the outer ring of the second bearing.

[0007] Furthermore, the driving assembly includes: a main gear, rotatably arranged on the base plate; a slave gear, meshing with the main gear, wherein one group of slave gears of the driving assembly is located below the rotating cylinder and rotates coaxially with the rotating shaft, another group of slave gears of the driving assembly is sleeved on the outer wall of the rotating cylinder and rotates coaxially with the rotating cylinder, and another group of slave gears of the driving assembly is sleeved on the outer ring of the second bearing and rotates coaxially with the outer ring of the second bearing; a driving motor is fixedly mounted on the base plate and is used to drive the main gear to rotate.

[0008] Furthermore, the support platform also includes a cover shell, which is fixed to the upper surface of the base plate, and the main gears and slave gears of the three groups of driving assemblies are all located in the cover shell.

[0009] Furthermore, the wiring harness of the driving motor is routed along the supporting strip.

[0010] Furthermore, a plurality of fan blades are fixed along a circle of the outer wall of the suspension platform, and when the three rotating circular plates rotate synchronously in the same direction, the plurality of fan blades blow cooling air toward the clamping mechanism of the suspension platform.

[0011] Furthermore, one end of the extension rod away from the rotating circular plate extends out of the outer circumference of the suspension platform, and three equidistantly distributed suspension plates are fixed on the circumference of the suspension platform. One end of the bent connecting rod away from the hinge joint is hinged to the end surface of the suspension plate away from the end of the suspension platform, and a plurality of fan blades are located between the end surface of the suspension plate away from the end of the suspension platform and the outer circumference of the suspension platform.

[0012] One or more technical solutions provided in this application have at least the following technical effects or advantages: Due to the adoption of an adjustment mechanism, the clamping mechanism fixes the base material, the drive motor is started, and the corresponding rotating circular plate is driven to rotate through the gear set. The rotating circular plate pushes the suspension to tilt through the extension rod and the bending connecting rod. By controlling the rotation angle of the three rotating circular plates, the pitch, deflection and compound angle adjustment of the suspension can be achieved. After adjusting to the target angle, the welding gun performs flame brazing on the base material, and during the flame welding process, the angle can be adjusted in real time to improve the welding quality. After the welding is completed, the three rotating circular plates rotate synchronously in the same direction, driving the fan blades to generate cooling air and accelerate the cooling of the base material. This solves the technical problem that the brazing device in the prior art usually uses a fixed clamping mechanism to fix the base material and cannot achieve multi-degree-of-freedom adjustment, and realizes multi-degree-of-freedom precise positioning of the base material. After welding, the turntable movement is used to achieve efficient cooling, thereby significantly improving production efficiency and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A partial structural schematic diagram of a brazing device for processing hardware in an embodiment of the present application; Figure 2 This is a schematic diagram of the overall structure of the clamping mechanism and the adjustment mechanism in the embodiment of the present application; Figure 3 for Figure 2 The schematic diagram of the middle part structure mainly shows the structure of the adjustment mechanism; Figure 4 for Figure 3 The schematic diagram of the middle part of the structure mainly shows the layout of the bending connecting rod; Figure 5 for Figure 4 A schematic cross-sectional view of the middle structure mainly illustrates the structure of the support platform; In the figure: 100, water tank; 200, welding gun; 1, turntable; 2, supporting strips; 3, clamping mechanism; 300, base material to be welded; 4, adjustment mechanism; 41, suspension platform; 411, suspension plate; 42, rotating circular plate; 421, extension rod; 422, hinged head; 43, bending connecting rod; 44, support platform; 4401, bearing 1; 4402, bearing 2; 441, bottom plate; 442, rotating shaft; 443, rotating cylinder; 444, cover; 45, drive assembly; 451, main gear; 452, slave gear; 453, drive motor; 46, fan blade. DETAILED DESCRIPTION

[0014] In order to better understand the technical solution of the present application, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0015] Reference Figure 1 and Figure 2 A brazing device for hardware processing includes a water tank 100, a turntable 1, a supporting strip 2, a clamping mechanism 3 and an adjusting mechanism 4. The water tank 100 is in the shape of a circular tank, and the water tank 100 is equipped with a circulating cooling water system to ensure the heat dissipation requirements during continuous operation; the turntable 1 is located at the center of the water tank 100, and the turntable 1 is connected to the water tank 100 through a bottom bearing mechanism to achieve a smooth rotation, and the turntable 1 is driven by a motor to achieve intermittent rotation; on the circumferential edge of the turntable 1, a plurality of radially extending support strips 2 are fixedly installed at equal intervals, and an adjustment mechanism 4 is installed at the end of each support strip 2 away from the turntable 1, and a clamping mechanism 3 is installed on each adjustment mechanism 4, and the clamping mechanism 3 is used to clamp the parent material to be welded, and the clamping mechanism 3 can be replaced according to the clamping requirements of the clamped parent material 300 to be welded, and the adjustment mechanism 4 is used to adjust the posture of the clamping mechanism 3; in the outer working area of ​​the turntable 1, a multi-directionally adjustable welding gun 200 is arranged, and the welding gun 200 is used to flame braze the parent material.

[0016] Reference Figure 2-Figure 5The adjustment mechanism 4 includes a suspension platform 41, a rotating circular plate 42, a bending connecting rod 43, a supporting platform 44, a driving assembly 45, and a fan blade 46. The suspension platform 41 is in the shape of a thick circular plate. The height of the suspension platform 41 is higher than the height of the supporting strip plate 2. There are multiple mounting holes on the upper surface of the suspension platform 41, which can be used to detachably connect different clamping mechanisms 3. Three equally spaced suspension plates 411 are fixed on the circumference of the suspension platform 41. The suspension plates 411 are used to connect the bending connecting rod 43. An equal number of fan blades 46 are arranged between two adjacent suspension plates 411. The fan blades 46 are fixed on the outer wall of the suspension platform 41. The length of the suspension plate 411 is greater than the length of the fan blades 46. When the suspension platform 41 rotates circumferentially around the central axis, the fan blades 46 around the suspension platform 41 will also rotate synchronously, thereby blowing out airflow. The rotating circular plate 42 is in the shape of a thin circular plate. The diameter of the rotating circular plate 42 is much smaller than the diameter of the suspension platform 41. The axis of the rotating circular plate 42 is collinear with the axis of the suspension platform 41. There are three rotating circular plates 42 in total. The three rotating circular plates 42 are horizontally arranged with their axes collinear. The three rotating circular plates 42 are respectively located at different heights and are all located below the suspension platform 41. An extension rod 421 is fixed on each rotating circular plate 42. The end of the extension rod 421 away from one end of the rotating circular plate 42 is provided with a hinge joint 422, and the three driving assemblies 45 respectively drive the three rotating circular plates 42 to rotate independently.

[0017] Continue to refer to Figure 2-Figure 5 One end of the bending link 43 is hinged on the hinge head 422, and the other end is hinged on the end surface of the suspension plate away from the suspension platform 41. The three bending links 43 are respectively and evenly spaced 120° from the hinge points of the three suspension plates 411 to ensure that the suspension platform 41 can be adjusted in multiple directions. The hinge axis between the bending link 43 and the hinge head 422 is inclined, and the top extension line of the hinge axis passes through the axis of the suspension platform 41. The hinge axis between the bending link 43 and the suspension plate 411 is horizontal and passes through the center of the suspension platform 41. The three coaxial but independently rotating rotating circular plates 42 are connected to the suspension platform 41 through the bending links 43 to form a spatial parallel mechanism. The rotation of each rotating circular plate 42 will push the suspension platform 41 to produce inclination angle changes in different directions through the corresponding bending connecting rod 43. The bending connecting rod 43 and the hinge axis of the suspension platform 41 are arranged horizontally to ensure uniform force, and the inclined design with the hinge axis of the rotating circular plate 42 forms an asymmetric thrust, so that the suspension platform 41 can be tilted in multiple directions when the three groups of bending connecting rods 43 move in coordination. The specific angle depends on the length of the connecting rod and the position of the hinge point. The length of the bending connecting rod 43 and the position of the hinge point can be designed according to the needs of posture adjustment. In addition, using three groups of driving components 45 to make the three rotating circular plates 42 rotate synchronously in the same direction can make the suspension platform 41 rotate.

[0018] Continue to refer to Figure 2-Figure 5The support platform 44 is installed at the end of the support strip 2 away from the turntable 1. The support platform 44 is used to support three rotating circular plates 42 and install three sets of driving components 45. The support platform 44 includes a base plate 441, a rotating shaft 442, a rotating cylinder 443 and a cover 444. The base plate 441 is horizontally arranged and fixedly connected to the end of the support strip 2 away from the turntable 1. The rotating shaft 442 is vertically arranged and rotatably arranged at the center of the base plate 441. The first rotating circular plate 42 is fixed on the top of the rotating shaft 442. The axis of the rotating circular plate 42 is colinear with the axis of the rotating shaft 442; the rotating cylinder 443 is sleeved on the outside of the rotating shaft 442, and a bearing 4401 is arranged between the inner wall of the rotating cylinder 443 and the rotating shaft 442. The rotating cylinder 443 and the rotating shaft 442 can realize relative rotation through the bearing 4401. The top of the rotating cylinder 443 is located at the top of the rotating shaft 442 The second rotating circular plate 42 is sleeved and fixed on the outer wall of the top of the rotating cylinder 443, and the second rotating circular plate 42 rotates synchronously with the rotating cylinder 443; the outer wall of the rotating cylinder 443 and below the second rotating circular plate 42 is also sleeved with a bearing 2 4402, and a third rotating circular plate 42 is arranged above the bearing 2 4402, and the third rotating circular plate 42 is located below the second rotating circular plate 42, and the lower bottom surface of the third rotating circular plate 42 and the outer ring of the bearing 2 4402 are fixedly connected, so that the third rotating circular plate 42 and the rotating cylinder 443 can achieve relative rotation through the bearing 2 4402. The cover 444 is fixed on the bottom plate 441, and the top of the rotating shaft 442 passes through the top of the cover 444. The three rotating circular plates 42 are all located outside the cover 444, and some parts of the driving assembly 45 are located inside the cover 444.

[0019] Continue to refer to Figure 2-Figure 5The driving assembly 45 includes a main gear 451, a slave gear 452 and a driving motor 453. The main gear 451 is rotatably arranged on the bottom plate 441. The slave gears 452 of each group of driving assemblies 45 are meshed with their respective main gears 451. The slave gears 452 of one group of driving assemblies 45 are located below the bottom of the rotating cylinder 443 and rotate coaxially with the rotating shaft 442. The slave gears 452 of another group of driving assemblies 45 are sleeved on the outer wall of the rotating cylinder 443 and rotate coaxially with the rotating cylinder 443. The slave gears 452 of another group of driving assemblies 45 are sleeved and interference-fitted on the outer ring of the second bearing 4402. Specifically, the rotating circular plate 42 on the outer ring of the second bearing 4402 can be fixed on the slave gear 452; the driving motor 453 is installed on the lower surface of the bottom plate 441, and the driving motors 453 of each group of driving assemblies 45 drive their respective main gears 451 to rotate, and the wiring harness of the driving motor 453 is routed along the supporting strip 2 to avoid interference. Therefore, the driving component 45 corresponding to the slave gear 452 connected to the rotating shaft 442 can independently drive the rotating shaft 442 to rotate, and then drive the rotating circular plate 42 on the rotating shaft 442 to rotate independently; the driving component 45 corresponding to the slave gear 452 connected to the rotating cylinder 443 can independently drive the rotating cylinder 443 to rotate, and then drive the rotating circular plate 42 on the rotating cylinder 443 to rotate independently; the driving component 45 corresponding to the slave gear 452 connected to the outer ring of the bearing 2 4402 can independently drive the rotating circular plate 42 connected to the slave gear 452 to rotate independently.

[0020] The three sets of driving motors 453 respectively control the rotating shaft 442 (directly driving the upper circular plate), the rotating cylinder 443 (driving the middle circular plate), and the outer ring of the second bearing 4402 (driving the lower circular plate) through the main gear 451 and the slave gear 452. Each motor can be started and stopped individually or run synchronously, which is realized through PLC programming. The gear drive system ensures the precise movement of the rotating circular plate 42 and improves the welding quality.

[0021] This application can explain its functional principle through the following operation methods: Initial positioning stage: When the equipment is started, the three rotating circular plates 42 are all at the initial zero angle. At this time, the suspension platform 41 remains horizontal, and the clamping mechanism 3 firmly fixes the base material 300 to be welded to ensure that the workpiece will not shift during the subsequent adjustment process. The drive assembly 45 in the support platform 44 is in standby mode, ready for subsequent angle adjustment.

[0022] Multi-degree-of-freedom adjustment stage: when the welding angle needs to be adjusted, the drive motor 453 is started, and the corresponding rotating circular plate 42 is driven to rotate through the precision gear set (the meshing transmission of the main gear 451 and the slave gear 452). The rotational motion of each rotating circular plate 42 is transmitted to the bending connecting rod 43 through the extension rod 421 thereon. The three coaxial but independently rotating rotating circular plates 42 are connected to the suspension platform 41 through the bending connecting rod 43 to form a spatial parallel mechanism. The rotation of each rotating circular plate 42 will push the suspension platform 41 to produce inclination changes in different directions through the corresponding bending connecting rod 43, and convert the rotational motion into multi-directional tilting motion of the suspension platform 41. This adjustment process can realize the precise positioning of the suspension platform 41 in any direction in space.

[0023] Dynamic welding stage: The welding gun 200 heats and welds the adjusted base material, can monitor the welding status in real time, and dynamically adjust the angle of the suspension platform 41 as needed. Through the coordinated control of the three sets of drive motors 453, fine-tuning during the welding process is achieved to ensure that the welding gun 200 is always at the best welding angle, so that the brazing material flows evenly under the action of gravity. This dynamic adjustment capability is particularly suitable for the welding of complex curved surfaces or special-shaped workpieces.

[0024] Active cooling stage: the control system instructs the three rotating circular plates 42 to rotate synchronously in the same direction. The rotating motion is converted into a strong cooling airflow through the fan blades 46 on the periphery of the suspension platform 41. The cooling air directly acts on the welding part to achieve rapid and uniform cooling, which can shorten the traditional cooling time.

[0025] During the process of rotating the turntable 1 to switch workstations, the system can simultaneously control the rotation of the suspension platform 41 that has completed welding, so that the fan blades 46 continue to generate cooling airflow, thereby realizing parallel operations of welding, cooling, and workstation conversion. The cooling process of each workstation is carried out synchronously with the welding preparation of the next workstation, thereby improving the overall production efficiency and being suitable for large-scale continuous production scenarios.

[0026] This application, through the innovative design of mechanical structure and the coordination of intelligent control system, not only solves the problems of limited adjustment and low cooling efficiency of traditional brazing devices, but also realizes high-precision and high-efficiency intelligent production, and has significant technical advantages and application value in the field of hardware processing.

[0027] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0028] What has been described above is only a preferred specific implementation manner of the embodiments of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical scheme and concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A brazing device for hardware processing, comprising a turntable (1) rotatably arranged in a water tank (100), a plurality of support strips (2) fixed along a circle of the turntable (1), and a clamping mechanism (3) fixedly mounted on the support strips (2), wherein a welding gun (200) is arranged outside the turntable (1), and the clamping mechanism (3) is used to clamp a parent material (300) to be welded, characterized in that: The support strip (2) is provided with an adjustment mechanism (4) for adjusting the angle of the clamping mechanism (3), and the adjustment mechanism (4) comprises: A suspension platform (41) is located above the supporting strip plate (2), and the clamping mechanism (3) is detachably connected to the suspension platform (41); A rotating circular plate (42) is horizontally arranged and located below the suspension platform (41); three rotating circular plates (42) are arranged with their axes being colinear; a horizontally arranged extension rod (421) is fixed to each rotating circular plate (42); and a hinge joint (422) is arranged at one end of the extension rod (421) away from the rotating circular plate (42); A bending connecting rod (43), one end of which is hinged to the hinge joint (422), and the other end of which is hinged to the side of the suspension platform (41); three hinge points between the three bending connecting rods (43) and the suspension platform (41) are equidistantly distributed; a hinge axis between the bending connecting rod (43) and the hinge joint (422) is inclined, and an extension line of the top end of the hinge axis passes through the axis of the suspension platform (41); and a hinge axis between the bending connecting rod (43) and the suspension platform (41) is horizontal and passes through the center of a circle of the suspension platform (41); A support platform (44) is installed at the end of the support strip (2), and the support platform (44) is used to support the three rotating circular plates (42) with their axes colinear and rotating independently; The driving assembly (45) is provided in three groups and is used to drive the three rotating circular plates (42) to rotate respectively.

2. A brazing device for hardware processing as claimed in claim 1, characterized in that: The support platform (44) comprises: A bottom plate (441) is horizontally arranged and fixed to the end of the supporting strip plate (2); A rotating shaft (442) is vertically rotatably disposed on the bottom plate (441), and a rotating circular plate (42) is fixed on the top of the rotating shaft (442); The rotating cylinder (443) is sleeved on the outside of the rotating shaft (442), and a bearing 1 (4401) is arranged between the inner wall of the rotating cylinder (443) and the rotating shaft (442); the outer wall of the rotating cylinder (443) is located above the bearing 1 (4401) and sleeved with a bearing 2 (4402); the top of the rotating cylinder (443) is located below the top of the rotating shaft (442); a second rotating circular plate (42) is fixed on the outer wall of the top of the rotating cylinder (443), and a third rotating circular plate (42) is located below the second rotating circular plate (42); the third rotating circular plate (42) is fixedly connected to the outer ring of the second bearing (4402).

3. A brazing device for hardware processing as claimed in claim 2, characterized in that: The driving assembly (45) comprises: A main gear (451) rotatably disposed on the bottom plate (441); The slave gear (452) is meshed with the master gear (451), wherein the slave gear (452) of one set of the driving components (45) is located below the rotating cylinder (443) and rotates coaxially with the rotating shaft (442), the slave gear (452) of another set of the driving components (45) is sleeved on the outer wall of the rotating cylinder (443) and rotates coaxially with the rotating cylinder (443), and the slave gear (452) of another set of the driving components (45) is sleeved on the outer ring of the second bearing (4402) and rotates coaxially with the outer ring of the second bearing (4402); The driving motor (453) is fixedly mounted on the bottom plate (441) and is used to drive the main gear (451) to rotate.

4. A brazing device for hardware processing as claimed in claim 3, characterized in that: The support platform (44) further comprises a cover shell (444), wherein the cover shell (444) is fixed to the upper surface of the bottom plate (441), and the main gears (451) and the slave gears (452) of the three sets of the driving components (45) are all located inside the cover shell (444).

5. A brazing device for hardware processing as claimed in claim 3, characterized in that: The wiring harness of the drive motor (453) is routed along the support strip (2).

6. A brazing device for hardware processing as claimed in claim 1, characterized in that: A plurality of fan blades (46) are fixed around the outer wall of the suspension platform (41), and when the three rotating circular plates (42) rotate synchronously in the same direction, the plurality of fan blades (46) blow cooling air toward the clamping mechanism (3) of the suspension platform (41).

7. A brazing device for hardware processing as claimed in claim 6, characterized in that: One end of the extension rod (421) away from the rotating circular plate (42) extends out of the outer peripheral surface of the suspension platform (41); three suspension plates (411) are fixed to the peripheral surface of the suspension platform (41) at equal intervals; one end of the bending connecting rod (43) away from the hinge joint (422) is hinged to the end surface of the suspension plate (411) away from the suspension platform (41); and a plurality of the fan blades (46) are located between the end surface of the suspension plate (411) away from the suspension platform (41) and the outer peripheral surface of the suspension platform (41).

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