Novel direct-current fan

Abstract

The utility model discloses a novel direct current fan which comprises a fan body, the outer side of the fan body is fixedly connected with an extension frame, the extension frame is rotationally connected with two supporting shaft rods, the outer sides of the two supporting shaft rods are sleeved with adjusting frames, and the top ends of the adjusting frames are fixedly connected with protective plates. The bottom ends of the two supporting shaft rods are fixedly connected with linkage straight gears, the two linkage straight gears are in meshed connection, a positioning assembly is arranged at one end of the extending frame, the positioning assembly is used for locking the protection plate and comprises a bearing plate, a guiding plate and a supporting rod, one end of the extending frame is fixedly connected with the guiding plate, and the guiding plate is fixedly connected with the supporting rod. The utility model relates to the technical field of direct-current fans. Through the structural cooperation of the supporting shaft rod, the protection plate and the linkage straight gear, the top end of the fan body can be effectively protected under the condition that the maintenance convenience of the fan body is not affected, and foreign matter is prevented from entering the fan body to affect the overall operation.

Description

TECHNICAL FIELD

[0001] The utility model relates to a direct current fan technical field, concretely is a novel direct current fan. BACKGROUND

[0002] Direct current fan is the fan that the direct current motor rotates to drive the fan impeller rotation to realize the conversion process of the direct current electric energy to mechanical energy through the input direct current electric energy, is widely applied in hospital, office building, hotel, shopping mall, villa, apartment building etc.

[0003] At present, to avoid the foreign matter into the direct current fan, the fan leaf place is installed more with the screen, however, due to the existence of the screen, before the direct current fan maintenance, first need to remove the screen, makes the overall maintenance operation more inconvenient.

[0004] Therefore, the utility model provides a novel direct current fan to solve above -mentioned problem. UTILITY MODEL CONTENTS

[0005] In view of the prior art's insufficient, the utility model provides a novel direct current fan, solves above -mentioned problem.

[0006] To realize above -mentioned purpose, the utility model is realized through following technical scheme: a novel direct current fan, including the fan main part, the outside fixed connection of fan main part has extension frame, two support shaft poles are rotatably connected on the extension frame, the outside of two support shaft poles all is sleeved with adjusting frame, the top of adjusting frame is fixedly connected with the guard board, the bottom of two support shaft poles all is fixedly connected with the linkage spur gear, and two linkage spur gears are engaged connection, one end of extension frame is provided with positioning assembly, positioning assembly is used for locking guard board.

[0007] Preferably, the positioning assembly includes a bearing plate, a guide plate, and a support rod, one end of the extension frame is fixedly connected with the guide plate, the guide plate is provided with a guide slot, the support rod is movably connected in the guide slot, one end of the support rod is fixedly connected with the bearing plate, both ends of the bearing plate are fixedly connected with limit rings, and the two limit rings are sleeved with the two support shaft poles, one side of the bearing plate is rotatably connected with a transmission screw, and the transmission screw is threadedly connected with a transmission seat outside.

[0008] Preferably, the positioning assembly further includes a positioning seat, a linkage rod, a linkage shaft, and an eccentric plate, the top of the transmission seat is fixedly connected with the positioning seat, the top of the positioning seat is fixedly connected with the linkage rod, the bottom of one end of the guide plate is rotatably connected with the linkage shaft, both ends of the linkage shaft are fixedly connected with the eccentric plate, the eccentric plate is provided with a linkage slot in the middle, and the support rod is movably connected in the linkage slot.

[0009] Preferably, the protective plates are semicircular structures, and one end of each of the two protective plates is fixedly connected with a protective net.

[0010] Preferably, the guide through slot is L-shaped, a sound-absorbing pad is fixedly connected inside the guide through slot, and a rubber pad is fixedly connected to the sound-absorbing pad.

[0011] Preferably, the outer side of the support shaft rod is fixedly connected with a limiting strip, one end of the adjusting frame close to the support shaft rod is fixedly connected with an assembly ring, limiting grooves are formed in the inner walls of the assembly ring and the limiting ring, and the limiting strip is further slidably connected inside the limiting grooves.

[0012] Preferably, a assembly hole is formed in the bottom of one end of the guide plate, and the linkage shaft rod is connected inside the assembly hole through a ball bearing.

[0013] Beneficial effects

[0014] The utility model provides a novel direct current fan. Compared with prior art, the following beneficial effects are achieved:

[0015] The novel direct current fan, through the structural cooperation of the support shaft rod, the protective plate and the linkage spur gear, can effectively protect the top end of the fan body without affecting the convenience of the fan body maintenance, avoid foreign matters from entering the fan body and affecting the overall operation.

[0016] The novel direct current fan, through the structural cooperation of the positioning assembly, can form the positioning of the protective plate in cooperation with the support shaft rod, greatly improve the assembly efficiency of the protective plate while ensuring the stability of the protective plate. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the overall structural schematic view of the utility model;

[0018] Figure 2 is the half cut structure schematic view of the utility model;

[0019] Figure 3 is the separation structure schematic view of the fan body and the extension frame of the utility model;

[0020] Figure 4 is the structural schematic view of the positioning assembly of the utility model.

[0021] 1, fan main body; 2, extension frame; 3, support shaft; 4, adjusting frame; 5, guard plate; 6, linkage straight gear; 7, positioning assembly; 8, bearing plate; 9, guide plate; 10, guide slot; 11, support rod; 12, mounting plate; 13, limit ring; 14, transmission screw; 15, transmission seat; 16, positioning seat; 17, linkage rod; 18, linkage shaft; 19, eccentric plate; 20, linkage slot; 21, sealing ring. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0023] Embodiment one:

[0024] Please refer to Figures 1-4 A novel direct current fan, including fan main body 1, the outer side of fan main body 1 is fixedly connected with extension frame 2, two support shafts 3 are rotatably connected on extension frame 2, the outer side of two support shafts 3 is all sleeved with adjusting frame 4, the top of adjusting frame 4 is fixedly connected with guard plate 5, the bottom of two support shafts 3 is all fixedly connected with linkage straight gear 6, and two linkage straight gears 6 are engagedly connected, one end of extension frame 2 is provided with positioning assembly 7, and positioning assembly 7 is used for locking guard plate 5;

[0025] In the embodiment, fan main body 1 includes:

[0026] Casing: for bearing and protecting internal components;

[0027] Inlet: for guiding air into the fan;

[0028] DC motor: the DC motor adopts grease ball bearing, to ensure smooth operation and reduce mechanical wear

[0029] Transmission part: the fan blade is driven to rotate by the connection between the DC motor and the fan blade, and in the embodiment, the sealing ring 21 is further arranged at the connection between the fan blade and the transmission part to avoid the outflow of lubricating oil.

[0030] The DC fan is mainly used to input DC electric energy, so that the DC motor rotates to drive the fan blade to rotate, thereby realizing the process of converting DC electric energy into mechanical energy. This is a mature prior art, and will not be described here.

[0031] In the embodiment, the guard plates 5 are semicircular structures, and each of the two guard plates 5 is fixedly connected with a protective net at the end close to each other. By virtue of the structural characteristics of the guard plates 5, when the two guard plates 5 are spliced with each other, a complete circle is formed, so that the top end of the fan body 1 can be completely blocked.

[0032] Embodiment two

[0033] Please refer to Figures 1-4 The embodiment provides a technical scheme based on the embodiment one: the positioning assembly 7 comprises a bearing plate 8, a guide plate 9, and a support rod 11, one end of the extension frame 2 is fixedly connected with the guide plate 9, the guide plate 9 is provided with a guide groove 10, the support rod 11 is movably connected in the guide groove 10, one end of the support rod 11 is fixedly connected with a mounting plate 12, both ends of the mounting plate 12 are fixedly connected with limit rings 13, and the two limit rings 13 are sleeved with the two support shafts 3 respectively, one side of the bearing plate 8 is rotatably connected with a transmission screw 14, and the transmission screw 14 is screw-connected with a transmission seat 15 outside.

[0034] In the embodiment, the outer side of the support shaft 3 is fixedly connected with a limit strip, the end close to the support shaft 3 of the adjusting frame 4 is fixedly connected with an assembly ring, the inner walls of the assembly ring and the limit ring 13 are provided with limit grooves, and the limit strip is also slidably connected in the limit grooves. By virtue of the limit grooves in the assembly ring, when the adjusting frame 4 is assembled, the limit grooves are corresponded with the limit strip, so that the assembly position of the adjusting frame 4 can be guided. When the support shaft 3 rotates, the limit strip is also located in the limit groove, so that the adjusting frame 4 can be driven to rotate. By virtue of the limit grooves in the limit ring 13, when the limit ring 13 is connected with the support shaft 3, the limit strip is located in the limit groove. Since the limit ring 13 is static, the limit strip can be locked in the limit groove, so that the support shaft 3 can be prevented from idling.

[0035] The positioning assembly 7 further comprises a positioning seat 16, a linkage rod 17, a linkage shaft 18, and an eccentric plate 19. The top end of the transmission seat 15 is fixedly connected with the positioning seat 16, the top end of the positioning seat 16 is fixedly connected with the linkage rod 17, the bottom of one end of the guide plate 9 is rotatably connected with the linkage shaft 18, both ends of the linkage shaft 18 are fixedly connected with the eccentric plate 19, the middle part of the eccentric plate 19 is provided with a linkage groove 20, and the support rod 11 is movably connected in the linkage groove 20.

[0036] In the embodiment, the guide groove 10 is “L”-shaped, a sound-absorbing pad is fixedly connected in the guide groove 10, and a rubber pad is fixedly connected on the sound-absorbing pad. By virtue of the structural characteristics of the guide groove 10, the support rod 11 can be driven to displace along the guide groove 10 in the process of rotating the eccentric plate 19.

[0037] In this embodiment, the bottom of one end of the guide plate 9 is provided with an assembly hole, and the linkage shaft rod 18 is connected in the interior of the assembly hole through a ball bearing. Through the arrangement of the assembly hole, the assembly of the linkage shaft rod 18 can be stably realized, and the smoothness of the rotation of the linkage shaft rod 18 can be greatly improved by cooperating with the arrangement of the ball bearing.

[0038] Meanwhile, the contents not described in detail in the specification all belong to the prior art known by those skilled in the art.

[0039] Working principle: when the fan main body 1 is applied, the top end of the fan main body 1 can be protected by the protective plate 5, so that foreign matters cannot enter the fan main body 1, and the operation of the fan main body 1 is more smooth.

[0040] When the fan main body 1 needs to be overhauled, first, the transmission screw rod 14 is rotated, and under the connection of the transmission screw rod 14 and the transmission seat 15, the transmission seat 15 can be displaced along the transmission screw rod 14. Since the linkage rod 17 is movably connected in the linkage channel 20, when the linkage rod 17 is displaced with the transmission seat 15, the eccentric plate 19 can be rotated under the support of the linkage shaft rod 18. Since the support rod 11 is also movably connected in the guide channel 10 and the linkage channel 20, the support rod 11 can be first slid upward and then transversely displaced by the overturning of the eccentric plate 19. When the support rod 11 reaches the top end of the guide channel 10, the limiting ring 13 will be moved out of the support shaft rod 3, so as to release the locking of the support shaft rod 3, and the support shaft rod 3 can be rotated.

[0041] Then, any one of the protective plates 5 is pulled, so that the protective plate 5 is rotated under the support of the support shaft rod 3 by means of the adjusting frame 4, and the kinetic energy of the support shaft rod 3 can be transmitted by cooperating with the connection of the two linkage spur gears 6, so as to promote the synchronous rotation of the two support shaft rods 3 in opposite directions. When the protective plate 5 is moved away from above the fan main body 1, the internal structure of the fan main body 1 is exposed, and then it can be overhauled. After the limiting ring 13 is separated from the support shaft rod 3, the adjusting frame 4 can be pulled up since the upper part of the adjusting frame 4 is no longer limited. After the adjusting frame 4 is separated from the support shaft rod 3, the protective plate 5 can be cleaned or replaced.

[0042] It is to be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0043] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A novel DC fan, characterized in that: The device includes a fan body (1), an extension frame (2) fixedly connected to the outside of the fan body (1), two support shafts (3) rotatably connected to the extension frame (2), an adjustment frame (4) sleeved on the outside of each of the two support shafts (3), a protective plate (5) fixedly connected to the top of the adjustment frame (4), a linkage spur gear (6) fixedly connected to the bottom of each of the two support shafts (3), and the two linkage spur gears (6) meshing together. A positioning component (7) is provided at one end of the extension frame (2), and the positioning component (7) is used to lock the protective plate (5).

2. The novel DC fan according to claim 1, characterized in that: The positioning component (7) includes a bearing plate (8), a guide plate (9), and a support rod (11). One end of the extension frame (2) is fixedly connected to the guide plate (9). A guide slot (10) is provided on the guide plate (9). The support rod (11) is movably connected inside the guide slot (10). One end of the support rod (11) is fixedly connected to a mounting plate (12). Both ends of the mounting plate (12) are fixedly connected to limit rings (13), and the two limit rings (13) are respectively sleeved with two support shafts (3). A transmission screw (14) is rotatably connected to one side of the bearing plate (8). A transmission seat (15) is threadedly connected to the outer side of the transmission screw (14).

3. A novel DC fan according to claim 2, characterized in that: The positioning assembly (7) also includes a positioning seat (16), a linkage rod (17), a linkage shaft (18), and an eccentric plate (19). The top end of the transmission seat (15) is fixedly connected to the positioning seat (16), the top end of the positioning seat (16) is fixedly connected to the linkage rod (17), the bottom end of one end of the guide plate (9) is rotatably connected to the linkage shaft (18), both ends of the linkage shaft (18) are fixedly connected to the eccentric plate (19), the middle part of the eccentric plate (19) is provided with a linkage through groove (20), and the support rod (11) is also movably connected inside the linkage through groove (20).

4. A novel DC fan according to claim 1, characterized in that: The protective plate (5) has a semi-circular structure, and a protective net is fixedly connected to the end of each of the two protective plates (5) that are close to each other.

5. A novel DC fan according to claim 2, characterized in that: The guide channel (10) is L-shaped, and a sound-absorbing pad is fixedly connected inside the guide channel (10), and a rubber pad is fixedly connected on the sound-absorbing pad.

6. A novel DC fan according to claim 2, characterized in that: A limiting strip is fixedly connected to the outer side of the support shaft (3), and an assembly ring is fixedly connected to one end of the adjustment frame (4) near the support shaft (3). Limit grooves are opened on the inner walls of the assembly ring and the limiting ring (13), and the limiting strip is also slidably connected inside the limiting groove.

7. A novel DC fan according to claim 3, characterized in that: The bottom of one end of the guide plate (9) is provided with an assembly hole, and the linkage shaft (18) is connected to the inside of the assembly hole by a ball bearing.

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