Rapidly-combined stepped box fan adopting quick-release structure

Abstract

The invention relates to the technical field of ventilation equipment, in particular to a stepped box fan capable of being rapidly combined and adopting a rapid disassembly structure. Supporting frames are fixed to the left side and the right side of the outer bottom wall of the box fan. The fixing frames are symmetrically arranged on the left side and the right side between the upper box fan and the lower box fan in a front-back mode in pairs, the two fixing frames which are symmetrical in the front-back mode are connected through a screw rod, and the two fixing frames which are symmetrical in the left-right mode on the rear side are fixedly connected through a connecting plate. The fixing plate is fixed to the top wall of the box fan on the lower side and abuts against the lower side wall of the supporting frame on the upper side. The connecting mechanism is arranged in the fixing plate, and the connecting mechanism is connected with the two adjacent supporting frames which are in bilateral symmetry; the pushing mechanism is arranged in the fixing plate, the pushing mechanism and the box fan on the upper side are arranged in a matched and abutting mode, and the pushing mechanism is connected with the connecting mechanism; through the symmetrically-arranged box fans, the fixing frames, the fixing plates and the connecting and pushing mechanisms, the connecting stability of the upper box fan and the lower box fan and the firmness of the overall structure are remarkably enhanced, installation is easy and convenient, and reliability is high.

Description

Technical Field

[0001] The invention relates to the technical field of ventilation equipment, and in particular to a stepped box fan which adopts a quick-detachable structure and can be quickly assembled. Background Art

[0002] The airflow coverage of box fans in the prior art is limited. The wind distance and diffusion range of a single fan are fixed, and it is impossible to form three-dimensional air supply by stacking, resulting in insufficient airflow in the height direction (such as poor air circulation in the upper floors of a warehouse) and insufficient lateral coverage (such as poor air supply in the corners of a workshop or over long distances). Later, box fans were stacked to increase the airflow in the height direction, but most of the existing connection methods use multiple bolts for fastening, and the disassembly and assembly process is cumbersome, making it difficult to achieve a quick assembly effect. Summary of the invention

[0003] The purpose of the present invention is to address the defects and shortcomings of the prior art and provide a stepped box fan that is reasonably designed, easy to use, and can be quickly assembled using a quick-disassembly structure. Through the symmetrical arrangement of the box fans, fixing frames, fixing plates, and connecting and pushing mechanisms, the stability of the connection between the upper and lower box fans and the firmness of the overall structure are significantly enhanced, and the installation is simple and the reliability is high.

[0004] To achieve the above object, the present invention adopts the following technical solution: it comprises: Box fans, there are two box fans, which are symmetrically arranged up and down, and support frames are fixed on the left and right sides of the outer bottom wall of the box fans; The fixing frames are four in number and are symmetrically arranged on the left and right sides between the upper and lower box fans in pairs. The two symmetrical fixing frames are connected by screws, and the inner walls of the fixing frames are matched and abutted against the side walls of the box fans. The two symmetrical fixing frames on the rear side are fixedly connected by a connecting plate. A fixing plate, wherein the fixing plate is arranged on the top wall of the lower box fan, and the fixing plate is arranged to abut against the lower side wall of the upper support frame; A connecting mechanism, wherein the connecting mechanism is arranged in the fixing plate and connected to two adjacent and bilaterally symmetrical supporting frames; A pushing mechanism, wherein the pushing mechanism is arranged in the fixing plate, the pushing mechanism is arranged to cooperate with the upper box fan and to abut against it, and the pushing mechanism is connected to the connecting mechanism; Through the above technical solution, the fixing plate is installed on the outer top wall of the lower box fan, and then the fixing frame is clamped to the four corners of the lower box fan. The upper box fan is then installed on the upper side of the fixing plate and contacts the pushing mechanism. Finally, it is connected to the upper support frame through the connecting mechanism, thereby increasing the stability of the upper and lower box fans after connection.

[0005] As a further improvement of the present invention, the outer walls on the left and right sides of the box fan are both symmetrically fixed with limit frames, and the two vertical plates of the limit frames are respectively arranged to conflict with the inner and outer sides of the side walls of the support frame; The above technical solution can increase the stability between the box fan and the support frame.

[0006] As a further improvement of the present invention, the connecting mechanism comprises: Connecting rods, there are two connecting rods, and they are respectively arranged on the lower side of the two fixed frames that are symmetrical on the upper side. A rotating shaft is fixed at the center of the lower surface of the connecting rod. The rotating shaft is screwed into the fixed plate through a bearing, and the rotating shaft is connected to the pushing mechanism; Insert blocks, there are four of them, and they are fixed to one end of the two side walls of the connecting rod respectively, the two insert blocks on the same connecting rod are arranged diagonally, and the insert blocks are inserted into the slots on the two side walls of the fixing frame; A linkage rod, wherein the linkage rod is screwed to the front side of the fixed plate through a bearing, and both ends of the linkage rod are connected to the rotating shafts on both sides through a worm gear pair; A driving rod, wherein the driving rod is screwed to the front side of the fixing plate through a bearing, the driving rod is connected to the middle end of the linkage rod through a bevel gear pair, and the front end of the driving rod is located in a circular groove on the front side wall of the fixing plate; Through the above technical solution, when disassembling, the driving rod is rotated, and the driving rod drives the linkage rod to rotate through the bevel gear pair, and the linkage rod drives the rotating shafts on both sides to rotate through the worm gear pair, and the rotating shaft drives the connecting rod to rotate, and the connecting rod drives the plug block to move, so that the plug block is separated from the slot on the fixed frame, thereby loosening the connection between the fixed plate and the fixed frame, and the rotating shaft drives the pushing mechanism during the rotation process.

[0007] As a further improvement of the present invention, the pushing mechanism comprises: Pushing connecting rods, there are four pushing connecting rods, and two of them are symmetrically embedded in the rectangular grooves on the front and rear sides of the upper surface of the fixed plate, and the lower ends of the pushing connecting rods are rotatably connected to the rectangular grooves through hinge seats; A push plate, wherein the push plate is arranged on the upper side of the fixed plate, and the upper surface of the push plate is arranged to abut against the outer bottom wall of the upper box fan. After the upper end of the push connecting rod is tilted upward, it is embedded and screwed into the rectangular groove on the lower surface of the push plate through the hinge seat; Connecting push plates, there are two connecting push plates, which are symmetrically arranged in a rectangular cavity inside the fixed plate, and the front and rear sides of the connecting push plates are respectively fixedly connected to the hinge seat at the lower end of the push connecting rod; A tension spring, wherein there are several tension springs, and the tension springs are fixed on a side wall connected to the push plate in equal amounts and at equal distances, and the other end of the tension spring is fixed on the inner wall of one side of the rectangular cavity of the fixed plate; The locking mechanism includes two locking mechanisms, which are symmetrically arranged in the fixed plate, and are connected to the push plate and the rotating shaft; Through the above technical solution, when the rotating shaft rotates, the locking mechanism is separated from the push plate. At this time, the elastic force of the tension spring drives the connected push plate to move to one side of the center of the fixed plate, and the connected push plate drives the lower end of the push connecting rod to move toward the center of the fixed plate. At this time, the upper end of the push connecting rod drives the push plate to move upward, and the push plate drives the upper box fan to move upward, thereby facilitating the removal of the upper box fan.

[0008] As a further improvement of the present invention, the tension spring is provided with a support rod inside, and the push plate is movably sleeved on the support rod on the left and right inner walls of the rectangular cavity of the support rod and the fixed plate; Through the above technical solution, the tension spring can be supported during the movement of the connecting push plate without affecting the expansion and contraction of the tension spring.

[0009] As a further improvement of the present invention, the locking mechanism comprises: The locking blocks are two in an "L" shape. The two locking blocks are inserted into a side wall of the push plate symmetrically in front and back. The outer ends of the locking blocks are fixed with rotating rods, which are screwed to the fixed plate through bearings. A linkage shaft, wherein the linkage shaft is screwed to the fixed plate through a bearing, the linkage shaft is connected to the rotating shaft through a synchronous wheel transmission assembly, and two driving gears are sleeved and fixed on the lower end of the linkage shaft, and the driving gears are both located in the fixed plate; A linkage rack, wherein the linkage rack is meshed with one side of the driving gear on the upper side, and driven gears are arranged on both the front and rear sides of the driving gear, and the driven gears are respectively sleeved and fixed on the lower ends of the rotating rods on the front and rear sides, and one of the driven gears is meshed with the linkage rack; A linkage gear rack, wherein the linkage gear rack is arranged in a "Z" shape, and the teeth on both sides of the linkage gear rack are respectively meshed with another driven gear and the driving gear on the lower side; Through the above technical solution, the rotating shaft drives the linkage shaft to rotate through the synchronous wheel transmission assembly, the linkage shaft drives the driving gear to rotate, the driving gear drives the linkage rack and the linkage rack to move, the linkage rack and the linkage rack respectively drive the driven gear to rotate, the driven gear drives the rotating rod to rotate, the rotating rod drives the locking block to rotate, and at this time the two locking blocks rotate in opposite directions until the locking block moves out of the push plate.

[0010] As a further improvement of the present invention, a sliding bar is fixed on the side walls of the linkage rack and the linkage rack, and the sliding bar is slidably arranged in a sliding groove on the inner wall of the fixed plate; Through the above technical solution, the stability of the linkage rack and the linkage rack during movement can be increased.

[0011] As a further improvement of the present invention, a connecting piece is fixed symmetrically on the front side wall of the upper side of the box fan, a fixed plug-in piece is fixed on the upper side of the rear side wall of the connecting piece, the fixed plug-in piece is inserted into the connecting groove of the fixed plate, a movable plug-in piece is provided on the side of the fixed plug-in piece away from the middle side of the upper side of the box fan, the movable plug-in piece is movably arranged in the other side of the connecting groove of the fixed plate, the protrusion on the movable plug-in piece is inserted into the card groove on the inner wall of one side of the connecting groove, the front side of the movable plug-in piece is slidably arranged in the sliding groove on the connecting piece, and the movable plug-in piece is connected to the fixed plug-in piece by a reset spring; Through the above technical solution, when the fixed plate is installed on the box fan, the movable plugs on both sides are moved toward the middle side of the connecting plate, and then the fixed plate is moved forward from the rear side above the box fan and placed on the box fan, and then the movable plug is released, and then moved outward under the elastic force of the reset spring until the protrusion on the movable plug is stuck in the corresponding slot, and then with the cooperation of the connecting plate, the fixed plate is positioned on the box fan.

[0012] As a further improvement of the present invention, a toggle plate is rotatably connected to the front side wall of the movable insert through a hinge, the side wall of the toggle plate is arranged to cooperate with the movable insert, and the movable directions of the toggle plates on both sides are arranged in opposite directions; Through the above technical solution, when the movable insert needs to be moved, the toggle plate is rotated forward to contact the movable insert, and when the toggle plate is pushed, the toggle plate contacts the movable insert, thereby preventing the toggle plate from rotating in the opposite direction.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the symmetrical fixing frame, fixing plate and connecting mechanism, the upper and lower sashes are closely connected to improve the stability of the overall structure; 2. The connecting mechanism is linked with the pushing mechanism. The fixed frame can be unlocked by turning the driving rod. The pushing mechanism automatically lifts the upper box fan, making disassembly convenient and efficient. 3. The limit frame cooperates with the locking mechanism to prevent the fan from shifting, and the tension spring and support rod buffer the external force impact to extend the service life; 4. The design of movable insert and return spring simplifies the installation process of fixed plate, and the toggle plate assists the operation, ensuring a firm installation and saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention.

[0015] Figure 2 It is an exploded view of the present invention.

[0016] Figure 3 It is an exploded view of the connecting mechanism, the fixing plate and the supporting frame in the present invention.

[0017] Figure 4 for Figure 3 Enlarged view of part A in the middle.

[0018] Figure 5 It is an exploded view of the propulsion mechanism in the present invention.

[0019] Figure 6 It is a schematic diagram of the structure of the push connecting rod, tension spring and connecting push plate in the present invention.

[0020] Figure 7 It is an exploded view of the locking mechanism in the present invention.

[0021] Figure 8 It is an exploded view of the connecting piece, the fixed plug piece, the movable plug piece and the toggle plate in the present invention.

[0022] Description of reference numerals: Box fan 1, supporting frame 2, fixing frame 3, connecting plate 4, fixing plate 5, connecting mechanism 6, connecting rod 6-1, rotating shaft 6-2, plug block 6-3, linkage rod 6-4, driving rod 6-5, pushing mechanism 7, pushing connecting rod 7-1, pushing plate 7-2, connecting push plate 7-3, tension spring 7-4, locking mechanism 7-5, locking block 7-5-1, rotating rod 7-5-2, linkage shaft 7-5-3, driving gear 7-5-4, linkage rack 7-5-5, driven gear 7-5-6, linkage gear frame 7-5-7, limiting frame 8, supporting rod 9, sliding bar 10, connecting plate 11, fixed plug 12, movable plug 13, reset spring 14, toggle plate 15. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. The preferred embodiments in the description are only used as examples, and all other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present invention. Example

[0024] like Figure 1-Figure 8 As shown, the present embodiment includes a box fan 1, wherein the box fans 1 are two and are symmetrically arranged up and down, and the left and right sides of the outer bottom wall of the box fan 1 are both welded and fixed with a support frame 2; the outer walls on the left and right sides of the box fan 1 are both symmetrically welded and fixed with a limit frame 8, and the two vertical plates of the limit frame 8 are respectively arranged to conflict with the inner and outer sides of the side walls of the support frame 2, which can increase the stability between the box fan 1 and the support frame 2; The fixing frames 3 are four in number, and are symmetrically arranged on the left and right sides between the upper and lower box fans 1 in pairs, the two symmetrical fixing frames 3 are connected by screws, the inner walls of the fixing frames 3 are matched and abutted against the side walls of the box fans 1, and the two symmetrical fixing frames 3 on the rear side are fixedly connected by a connecting plate 4; A fixing plate 5, wherein the fixing plate 5 is arranged on the top wall of the box fan 1 at the lower side, and the fixing plate 5 is arranged to abut against the lower side wall of the supporting frame 2 at the upper side; A connecting mechanism 6, wherein the connecting mechanism 6 is disposed in the fixing plate 5, and the connecting mechanism 6 is connected to two adjacent and bilaterally symmetrical supporting frames 2; The pushing mechanism 7 is arranged in the fixing plate 5 , and the pushing mechanism 7 is arranged to cooperate with and abut against the box fan 1 on the upper side, and the pushing mechanism 7 is connected to the connecting mechanism 6 . Example

[0025] See also Figure 2-4 As shown, based on Example 1, the connecting mechanism 6 includes: Connecting rods 6-1, there are two connecting rods 6-1, and they are respectively arranged on the lower side of the two fixed frames 3 on the upper side, and a rotating shaft 6-2 is welded and fixed to the center of the lower surface of the connecting rod 6-1, and the rotating shaft 6-2 is screwed into the fixed plate 5 through a bearing, and the rotating shaft 6-2 is connected to the pushing mechanism 7; Insertion blocks 6-3, there are four of the insertion blocks 6-3, and they are respectively fixed to one end of the two side walls of the connecting rod 6-1, and the two insertion blocks 6-3 on the same connecting rod 6-1 are arranged diagonally, and the insertion blocks 6-3 are inserted into the slots on the two side walls of the fixing frame 3; Linkage rod 6-4, the linkage rod 6-4 is screwed to the front side of the fixed plate 5 through a bearing, and both ends of the linkage rod 6-4 are connected to the rotating shaft 6-2 on both sides through a worm gear pair; The driving rod 6-5 is screwed to the front side of the fixed plate 5 through a bearing. The driving rod 6-5 is connected to the middle end of the linkage rod 6-4 through a bevel gear pair. The front end of the driving rod 6-5 is located in a circular groove on the front side wall of the fixed plate 5. Example

[0026] See also Figure 2 , Figure 5-6 As shown, based on Example 2, the pushing mechanism 7 includes: Pushing connecting rods 7-1, there are four pushing connecting rods 7-1, and two of them are symmetrically embedded in the rectangular grooves on the front and rear sides of the upper surface of the fixing plate 5, and the lower ends of the pushing connecting rods 7-1 are screwed to the rectangular grooves through hinge seats; The push plate 7-2 is arranged on the upper side of the fixed plate 5, and the upper surface of the push plate 7-2 is arranged to abut against the outer bottom wall of the upper box fan 1. After the upper end of the push connecting rod 7-1 is tilted upward, it is embedded and screwed into the rectangular groove on the lower surface of the push plate 7-2 through the hinge seat; Connecting push plates 7-3, there are two connecting push plates 7-3, and they are symmetrically arranged in the rectangular cavity inside the fixed plate 5, and the front and rear sides of the connecting push plates 7-3 are respectively fixedly connected to the hinge seat at the lower end of the push connecting rod 7-1; Tension spring 7-4, the tension spring 7-4 is several, and the tension spring 7-4 is welded and fixed on one side wall of the connecting push plate 7-3 in equal quantity and equidistantly, and the other end of the tension spring 7-4 is welded and fixed on the inner wall of one side of the rectangular cavity of the fixed plate 5; support rods 9 are arranged inside the tension spring 7-4, and the support rods 9 are on the left and right inner walls of the rectangular cavity of the fixed plate 5, and the connecting push plate 7-3 is movably sleeved on the support rods 9, which can support the tension spring 7-4 during the movement of the connecting push plate 7-3 without affecting the expansion and contraction of the tension spring 7-4; The locking mechanism 7-5 is two and is symmetrically arranged in the fixing plate 5. The locking mechanism 7-5 is connected to the pushing plate 7-2 and the rotating shaft 6-2. Example

[0027] See also Figure 5 , Figure 7 As shown, based on Example 3, the locking mechanism 7-5 includes: The locking blocks 7-5-1 are two in an "L" shape. The two locking blocks 7-5-1 are inserted into a side wall of the push plate 7-2 symmetrically in front and back. The outer ends of the locking blocks 7-5-1 are welded and fixed with rotating rods 7-5-2, and the rotating rods 7-5-2 are screwed to the fixed plate 5 through bearings. The linkage shaft 7-5-3 is screwed on the fixed plate 5 through a bearing, and the linkage shaft 7-5-3 is connected to the rotating shaft 6-2 through a synchronous wheel transmission assembly. The lower end of the linkage shaft 7-5-3 is sleeved and welded with two driving gears 7-5-4, and the driving gears 7-5-4 are both located in the fixed plate 5; A linkage rack 7-5-5, wherein the linkage rack 7-5-5 is meshed with one side of the driving gear 7-5-4 on the upper side, and driven gears 7-5-6 are provided on both the front and rear sides of the driving gear 7-5-4, and the driven gears 7-5-6 are respectively sleeved and welded to the lower ends of the rotating rods 7-5-2 on the front and rear sides, and one of the driven gears 7-5-6 is meshed with the linkage rack 7-5-5; The linkage gear rack 7-5-7 is arranged in a "Z" shape, and the teeth on both sides of the linkage gear rack 7-5-7 are respectively meshed with another driven gear 7-5-6 and the driving gear 7-5-4 on the lower side; the side walls of the linkage gear rack 7-5-7 and the linkage rack 7-5-5 are welded and fixed with sliding bars 10, and the sliding bars 10 are slidably arranged in the sliding groove of the inner wall of the fixed plate 5, which can increase the stability of the linkage gear rack 7-5-7 and the linkage rack 7-5-5 when moving. Example

[0028] See also Figure 1-2 , Figure 8 As shown, on the basis of Example 1, a connecting piece 11 is welded and fixed symmetrically on the front side wall of the upper side of the box fan 1, and a fixed plug 12 is welded and fixed on the upper side of the rear side wall of the connecting piece 11, and the fixed plug 12 is inserted in the connecting groove on the fixed plate 5, and a movable plug 13 is provided on the side of the fixed plug 12 away from the middle side of the upper side of the box fan 1, and the movable plug 13 is movably arranged in the other side of the connecting groove of the fixed plate 5, and the protrusion on the movable plug 13 is inserted in the card groove on the inner wall of one side of the connecting groove, and the front side of the movable plug 13 is slidably arranged in the sliding groove on the connecting piece 11, and the movable plug 13 is connected to the fixed plug 12 by a reset spring 14; a toggle plate 15 is rotated on the front side wall of the movable plug 13 through a hinge, and the side wall of the toggle plate 15 is matched with the movable plug 13 and is set to abut against it, and the movable directions of the toggle plates 15 on both sides are set in opposite directions.

[0029] When using the present invention, the fixing plate 5 is installed on the outer top wall of the lower box fan 1, and then the fixing frame 3 is clamped to the four corners of the lower box fan 1, and then the upper box fan 1 is installed on the upper side of the fixing plate 5, and conflicts with the pushing mechanism 7, and finally connected to the upper support frame 2 through the connecting mechanism 6, so as to increase the stability of the upper and lower box fans 1 after being connected. When the fixing plate 5 is installed on the box fan 1, the toggle plate 15 is rotated to the front side and conflicts with the movable plug 13, and when the toggle plate 15 is pushed, the toggle plate 15 conflicts with the movable plug 13, thereby preventing the toggle plate 15 from rotating in the opposite direction. Move the movable plugs 13 on both sides toward the middle side of the connecting piece 11, then move the fixed plate 5 from the rear side above the box fan 1 to the front and place it on the box fan 1, then release the movable plug 13, and then move it outward under the elastic force of the reset spring 14 until the protrusion on the movable plug 13 is stuck in the corresponding slot, and then with the cooperation of the connecting plate 4, the fixed plate 5 is positioned on the box fan 1. When disassembling, rotate the driving rod 6-5, the driving rod 6-5 drives the linkage rod 6-4 to rotate through the bevel gear pair, and the linkage rod 6-4 drives the rotating shaft 6-2 on both sides to rotate through the worm gear pair, and the rotating shaft 6 -2 drives the connecting rod 6-1 to rotate, and the connecting rod 6-1 drives the plug block 6-3 to move, so that the plug block 6-3 is separated from the slot on the fixing frame 3, thereby loosening the connection between the fixing plate 5 and the fixing frame 3, and the rotating shaft 6-2 drives the linkage shaft 7-5-3 to rotate through the synchronous wheel transmission assembly, and the linkage shaft 7-5-3 drives the driving gear 7-5-4 to rotate, and the driving gear 7-5-4 drives the linkage rack 7-5-5 and the linkage rack 7-5-7 to move, and the linkage rack 7-5-5 and the linkage rack 7-5-7 respectively drive the driven gear 7-5-6 to rotate, and the driven gear 7-5-6 The rotating rod 7-5-2 is driven to rotate, and the rotating rod 7-5-2 drives the locking block 7-5-1 to rotate, and at this time, the two locking blocks 7-5-1 turn in opposite directions until the locking block 7-5-1 moves out of the pushing plate 7-2. At this time, the elastic force of the tension spring 7-4 drives the connecting push plate 7-3 to move toward one side of the center of the fixed plate 5, and the connecting push plate 7-3 drives the lower end of the pushing connecting rod 7-1 to move toward the center of the fixed plate 5. At this time, the upper end of the pushing connecting rod 7-1 drives the pushing plate 7-2 to move upward, and the pushing plate 7-2 drives the upper box fan 1 to move upward, thereby facilitating the removal of the upper box fan 1.

[0030] Compared with the prior art, the beneficial effects of this specific implementation are as follows: 1. Through the vertically symmetrical design of the box fan 1, the support of the four-corner fixing frame 3 and the locking of the connecting mechanism 6, a three-dimensional reinforcement structure is formed, which effectively prevents the box from shaking and deforming, and is particularly suitable for the bearing requirements of heavy equipment; 2. The original linkage unlocking mechanism (driving rod 6-5 → worm gear → plug block 6-3) works in coordination with the automatic lifting system (tension spring 7-4 + push plate 7-2), so that one person can complete the separation of the box fan 1 within 30 seconds, greatly reducing the maintenance time cost; 3. The U-shaped limit frame 8 realizes lateral positioning, the L-shaped locking block 7-5-1 provides vertical constraints, and the support rod 9 strengthens the impact resistance of the tension spring 7-4 to ensure that the equipment remains stably connected in a vibration environment; 4. The "push and click" structure of the movable insert 13 and the toggle plate 15 cooperates with the reset spring 14 to achieve rapid alignment and installation of the fixed plate 5, significantly reducing the difficulty of assembly and eliminating the risk of misoperation.

[0031] For those skilled in the art, they can modify the technical solutions described in the aforementioned embodiments and make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A stepped box fan with a quick-disassembly structure that can be quickly assembled, characterized in that: It contains: Box fans (1), wherein there are two box fans (1) which are symmetrically arranged in an upper and lower direction, and support frames (2) are fixed on both left and right sides of the outer bottom wall of the box fans (1); A fixing frame (3), wherein the fixing frames (3) are four in number and are symmetrically arranged on the left and right sides between the upper and lower box fans (1) in pairs, the two symmetrical fixing frames (3) are connected by screws, the inner wall of the fixing frame (3) is matched and abutted against the side wall of the box fan (1), and the two symmetrical fixing frames (3) on the rear side are fixedly connected by a connecting plate (4); A fixing plate (5), the fixing plate (5) being arranged on the top wall of the lower box fan (1), the fixing plate (5) being arranged to abut against the lower side wall of the upper support frame (2); A connecting mechanism (6), wherein the connecting mechanism (6) is arranged in the fixing plate (5), and the connecting mechanism (6) is connected to two adjacent and bilaterally symmetrical supporting frames (2); A pushing mechanism (7), wherein the pushing mechanism (7) is arranged in the fixing plate (5), the pushing mechanism (7) is arranged to cooperate with the box fan (1) on the upper side, and the pushing mechanism (7) is connected to the connecting mechanism (6).

2. According to claim 1, a stepped box fan with a quick-disassembly structure capable of rapid assembly, characterized in that: The outer walls on the left and right sides of the box fan (1) are symmetrically fixed with limit frames (8) up and down, and the two vertical plates of the limit frame (8) are respectively arranged to abut against the inner and outer sides of the side walls of the support frame (2).

3. The stepped box fan with a quick-disassembly structure according to claim 1 is characterized in that: The connecting mechanism (6) comprises: Connecting rods (6-1), wherein there are two connecting rods (6-1), which are respectively arranged at the lower side of two upper symmetrical fixing frames (3); a rotating shaft (6-2) is fixed at the center of the lower surface of the connecting rod (6-1); the rotating shaft (6-2) is screwed into the fixing plate (5) via a bearing; and the rotating shaft (6-2) is connected to the pushing mechanism (7); Insert blocks (6-3), the number of the insert blocks (6-3) being four and being fixed to one end of the two side walls of the connecting rod (6-1), respectively, the two insert blocks (6-3) on the same connecting rod (6-1) being arranged diagonally, and the insert blocks (6-3) being inserted into slots on the two side walls of the fixing frame (3); A linkage rod (6-4), wherein the linkage rod (6-4) is screwed to the front side of the interior of the fixed plate (5) via a bearing, and both ends of the linkage rod (6-4) are respectively connected to the rotating shafts (6-2) on both sides via a worm gear pair; A driving rod (6-5) is screwed to the front side of the fixing plate (5) via a bearing, the driving rod (6-5) is connected to the middle end of the linkage rod (6-4) via a bevel gear pair, and the front end of the driving rod (6-5) is located in a circular groove on the front side wall of the fixing plate (5).

4. The stepped box fan with a quick-disassembly structure according to claim 3 is characterized in that: The pushing mechanism (7) comprises: Pushing connecting rods (7-1), wherein there are four pushing connecting rods (7-1), and two of the pushing connecting rods (7-1) are symmetrically embedded in rectangular grooves on the front and rear sides of the upper surface of the fixing plate (5), and the lower ends of the pushing connecting rods (7-1) are rotationally connected to the rectangular grooves via hinge seats; A push plate (7-2), the push plate (7-2) being arranged on the upper side of the fixed plate (5), the upper surface of the push plate (7-2) being arranged to abut against the outer bottom wall of the upper box fan (1), and the upper end of the push connecting rod (7-1) being tilted upward and then embedded and screwed into a rectangular groove on the lower surface of the push plate (7-2) through a hinge seat; Connecting push plates (7-3), wherein there are two connecting push plates (7-3) which are symmetrically arranged in a rectangular cavity inside the fixed plate (5), and the front and rear sides of the connecting push plates (7-3) are respectively fixedly connected to the hinge seat at the lower end of the push connecting rod (7-1); A tension spring (7-4), wherein the tension springs (7-4) are multiple and are fixed in equal amounts and at equal distances on a side wall connected to the push plate (7-3), and the other end of the tension spring (7-4) is fixed on an inner wall on one side of the rectangular cavity of the fixed plate (5); The locking mechanism (7-5) is two and is symmetrically arranged in the fixing plate (5). The locking mechanism (7-5) is connected to the pushing plate (7-2) and the rotating shaft (6-2).

5. The stepped box fan with a quick-disassembly structure according to claim 4 is characterized in that: The tension spring (7-4) is provided with a support rod (9) inside. The push plate (7-3) is movably sleeved on the support rod (9) and on the left and right inner walls of the rectangular cavity of the support rod (9) and the fixed plate (5).

6. The stepped box fan with a quick-disassembly structure according to claim 4 is characterized in that: The locking mechanism (7-5) comprises: Locking blocks (7-5-1), there are two locking blocks (7-5-1), and both are arranged in an "L" shape. The two locking blocks (7-5-1) are inserted into a side wall of the push plate (7-2) symmetrically in front and back, and the outer ends of the locking blocks (7-5-1) are fixed with rotating rods (7-5-2), and the rotating rods (7-5-2) are screwed to the fixed plate (5) through bearings; A linkage shaft (7-5-3), wherein the linkage shaft (7-5-3) is screwed onto the fixed plate (5) via a bearing, the linkage shaft (7-5-3) is connected to the rotating shaft (6-2) via a synchronous wheel transmission assembly, and two driving gears (7-5-4) are sleeved and fixed on the lower end of the linkage shaft (7-5-3), and the driving gears (7-5-4) are both located inside the fixed plate (5); A linkage rack (7-5-5), wherein the linkage rack (7-5-5) is meshedly arranged on one side of the driving gear (7-5-4) on the upper side, and driven gears (7-5-6) are arranged on both the front and rear sides of the driving gear (7-5-4), and the driven gears (7-5-6) are respectively sleeved and fixed on the lower ends of the rotating rods (7-5-2) on the front and rear sides, and one of the driven gears (7-5-6) is meshedly arranged with the linkage rack (7-5-5); The linkage gear rack (7-5-7) is arranged in a "Z" shape, and the teeth on both sides of the linkage gear rack (7-5-7) are respectively meshed with another driven gear (7-5-6) and the driving gear (7-5-4) on the lower side.

7. The stepped box fan with a quick-detachable structure capable of rapid assembly according to claim 6, characterized in that: A sliding bar (10) is fixed on the side walls of the linkage rack (7-5-7) and the linkage rack (7-5-5), and the sliding bar (10) is slidably arranged in a sliding groove on the inner wall of the fixed plate (5).

8. The stepped box fan with a quick-disassembly structure according to claim 1 is characterized in that: A connecting piece (11) is fixed symmetrically on the front side wall of the upper side of the box fan (1), a fixed plug piece (12) is fixed on the upper side of the rear side wall of the connecting piece (11), the fixed plug piece (12) is inserted into the connecting groove on the fixed plate (5), a movable plug piece (13) is arranged on the side of the fixed plug piece (12) away from the middle side of the upper side of the box fan (1), the movable plug piece (13) is movably arranged in the other side of the connecting groove of the fixed plate (5), the protrusion on the movable plug piece (13) is inserted into the groove on the inner wall of one side of the connecting groove, the front side of the movable plug piece (13) is slidably arranged in the sliding groove on the connecting piece (11), and the movable plug piece (13) and the fixed plug piece (12) are connected via a return spring (14).

9. The stepped box fan with a quick-detachable structure capable of rapid assembly according to claim 8, characterized in that: The front side walls of the movable insert (13) are hingedly connected with a toggle plate (15), the side walls of the toggle plate (15) are matched and abutted against the movable insert (13), and the movable directions of the toggle plates (15) on both sides are opposite.

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