Fan with two-way fan blades

Abstract

The utility model discloses a fan with bidirectional fan blades, and relates to a multifunctional fan for exhausting or sucking air. The fan with the two-way fan blades is convenient to use and attractive in structure. The bidirectional fan blade fan comprises a main body frame, a motor support is arranged on the main body frame, a motor is installed on the front side of the motor support, a rotating shaft is arranged at the output end of the motor, fan blades are detachably arranged on the rotating shaft in a sleeved mode, each fan blade comprises a sleeving ring, and the sleeving rings are matched with the rotating shaft in the circumferential direction. The front end and the rear end of the rotating shaft protrude out of the end face of the sleeving ring, a plurality of blades are evenly arranged on the outer side of the sleeving ring, projections of the blades in the circumferential direction of the outer side of the sleeving ring are located in the front end face and the rear end face of the sleeving ring, a clamping ring is arranged on the front end face of the rotating shaft, and the outer diameter of the clamping ring is larger than the inner diameter of the sleeving ring.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a bidirectional blade fan. Background Art

[0002] The common exhaust fans currently used all have air intake from the front and air exhaust from the back. A fan rack is installed on the back of the fan blades to isolate the fan blades from the chassis plate. If the ventilation position is changed to air intake, the entire fan needs to be turned over and installed.

[0003] There are the following disadvantages to installing the entire fan overturned: (1) The installation surface of the fan is generally close to the end face of the fan. After turning it over, the fan blades are close to the iron plate of the chassis. When there is a gap in the bearing and the high-speed rotation of the bearing generates vibration, there is no isolation from the fan frame, which can easily cause the fan blades to contact the chassis plate and generate noise or collision; (2) The fan frame is not beautiful; (3) The wind direction of the fan cannot be freely changed according to actual use needs, which is very inconvenient to use. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a bidirectional blade fan which is convenient to use and has an aesthetically pleasing structure.

[0005] The utility model discloses a bidirectional fan with blades, comprising a main body frame, a motor bracket being arranged on the main body frame, a motor being installed on the front side of the motor bracket, a rotating shaft being arranged at the output end of the motor, fan blades which can be installed in both directions being sleeved on the rotating shaft, the fan blades comprising a sleeve ring, the sleeve ring being matched with the rotating shaft in the circumferential direction, the front and rear ends of the rotating shaft protruding from the end surface of the sleeve ring, a plurality of blades being evenly arranged on the outside of the sleeve ring, the projections of the blades on the circumferential direction of the outside of the sleeve ring are all located within the front and rear end surfaces of the sleeve ring, a clamping ring is arranged on the front end surface of the rotating shaft, and the outer diameter of the clamping ring is larger than the inner diameter of the sleeve ring.

[0006] The utility model provides a bidirectional blade fan, wherein a through cylindrical cavity is provided at the middle of the main frame, and mounting holes are provided at the four corners of the main frame.

[0007] The utility model discloses a bidirectional blade fan, wherein the motor bracket is arranged in a position of a cylindrical cavity close to the back side of a main frame, the motor bracket comprises a mounting ring, a plurality of connecting rods are arranged around the mounting ring, the connecting rods are symmetrical about the axis center of the mounting ring, and the other end of the connecting rods is connected to the inner side wall of the cylindrical cavity.

[0008] The utility model provides a bidirectional blade fan, wherein the motor is mounted on the inner side of the mounting ring, and the output end of the motor is coaxially arranged with the rotating shaft.

[0009] The utility model provides a bidirectional blade fan, wherein the outer side surface of the rotating shaft is provided with a plurality of limit convex strips, the limit convex strips are parallel to the axial direction of the rotating shaft, the inner side of the sleeve ring is provided with limit slots having the same number as the limit convex strips, and the limit convex strips are slidably clamped in the limit slots.

[0010] The utility model provides a bidirectional blade fan, wherein the inner side surface of the clamping ring is tightly fitted with the limiting convex strip on the outer side of the protruding sleeve ring.

[0011] The difference between the utility model bidirectional fan with blades and the prior art is that the utility model bidirectional fan with blades can be installed forwards and reverses through the separate design of the motor and the blades, so that the fan wind direction can be simply changed. During the installation of the blades, the projections of the blades on the outer circumference of the sleeve ring are all located within the front and rear end surfaces of the sleeve ring, and the length of the sleeve ring is less than the rotating shaft, and the front and rear ends of the rotating shaft protrude from the end surface of the sleeve ring. Through the above two structural designs, it can be ensured that the blades will not exceed the plane where the end surface of the sleeve ring is located when they are installed in the forward and reverse directions, that is, the blades will not contact the motor bracket to generate noise or collision. After the blades are installed in reverse, the wind direction of the fan is reversed, that is, there is no need to turn the fan over as a whole, and the motor bracket is still located on the back side of the fan, ensuring the overall beauty of the front of the fan.

[0012] The bidirectional blade fan of the utility model is further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the bidirectional fan of the utility model when the fan blades are installed properly;

[0014] Figure 2 This is an exploded view of the utility model of a two-way fan with blades installed properly;

[0015] Figure 3 It is an exploded view of the assembly of the rotating shaft and the clamping ring when the blades of the bidirectional blade fan of the utility model are installed upright;

[0016] Figure 4 It is a schematic diagram of the structure of the bidirectional fan with blades installed in reverse in the utility model;

[0017] Figure 5 This is an exploded view of the utility model when the blades of the bidirectional fan are reversely installed;

[0018] Figure 6 It is a schematic diagram of the structure of the back side of the blade and the rotating shaft of the bidirectional blade fan of the utility model when they are assembled;

[0019] The markings in the figure are as follows: 1-main frame; 11-cylindrical cavity; 12-mounting hole; 2-motor bracket; 21-mounting ring; 22-connecting rod; 3-motor; 4-rotating shaft; 41-limiting convex strip; 5-fan blade; 51-sleeve ring; 52-blade; 53-limiting slot; 6-clamping ring. DETAILED DESCRIPTION

[0020] The following embodiments are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0021] Example

[0022] like Figure 1 and Figure 4 As shown, the utility model bidirectional fan comprises a main frame 1, a motor bracket 2 is arranged at the rear side of the main frame 1, a motor 3 is installed at the front side of the motor bracket 2, a rotating shaft 4 is arranged at the output end of the motor 3, and a bidirectionally installable fan blade 5 is sleeved on the rotating shaft 4. A clamping ring 6 is detachably arranged at the end of the rotating shaft 4.

[0023] The main frame 1 is a cubic structure, which is convenient for installing the fan body. A through cylindrical cavity 11 is provided in the middle of the main frame 1 as an air duct for air inlet and outlet. Mounting holes 12 are provided at the four corners of the main frame 1, and the mounting holes 12 are used to install bolts to fix the main frame 1.

[0024] The motor bracket 2 is arranged at a position near the back of the main frame 1 in the cylindrical cavity 11, so as to leave enough space for adjusting the direction of the fan blade 5 and not affecting the rotation of the fan blade 5 after the direction is adjusted. Figure 2 and Figure 5 As shown, a plurality of connecting rods 22 are arranged around the mounting ring 21. The connecting rods 22 are symmetrical about the axis of the mounting ring 21, and the other ends of the connecting rods 22 are connected to the inner side wall of the cylindrical cavity 11.

[0025] The motor 3 is mounted on the inner side of the mounting ring 21, and the output end of the motor 3 is coaxially arranged with the rotating shaft 4. The outer side surface of the rotating shaft 4 is provided with a plurality of limiting convex strips 41, and the limiting convex strips 41 are parallel to the axial direction of the rotating shaft 4.

[0026] like Figure 2 and Figure 5 As shown, the fan blade 5 includes a sleeve ring 51, and the sleeve ring 51 is matched with the rotating shaft 4 in the circumferential direction. Figure 3 and Figure 6As shown, the length of the sleeve ring 51 is smaller than the rotating shaft 4, and the front and rear ends of the rotating shaft 4 protrude from the end face of the sleeve ring 51. The inner side of the sleeve ring 51 is provided with limit slots 53 having the same number as the limit ribs 41. The limit ribs 41 are slidably clamped in the limit slots 53 to prevent misaligned rotation and realize power transmission. At least three blades 52 are evenly arranged on the outer side of the sleeve ring 51, and the blades 52 are distributed in a circular array on the side of the sleeve ring 51. At least three blades 52 can ensure the ability of air inlet and outlet. The projections of the blades 52 on the outer circumferential direction of the sleeve ring 51 are all located within the front and rear end faces of the sleeve ring 51, ensuring that the blades 52 will not exceed the plane where the end face of the sleeve ring 51 is located when installed in the forward and reverse directions, that is, the blades 52 will not contact the motor bracket 2 to produce noise or collision.

[0027] The clamping ring 6 is mounted on the front end face of the rotating shaft 4, and the outer diameter of the clamping ring 6 is larger than the inner diameter of the sleeve ring 51. Since the rotating shaft 4 protrudes from the front end face of the sleeve ring 51, the clamping ring 6 can contact the limiting convex strip 41 on the rotating shaft 4, and the inner side of the clamping ring 6 is tightly fitted with the limiting convex strip 41 protruding from the outer side of the sleeve ring 51, thereby fixing the fan blade 5.

[0028] The working principle of the bidirectional fan with blades of the utility model is as follows: when in use, the motor 3 is installed on the motor bracket 2, and the rotating shaft 4 is installed at the output end of the motor 3, and then the fan blades 5 are installed on the rotating shaft 4 as needed, and fixed by the clamping ring 6; when it is necessary to adjust the air inlet and outlet directions of the fan blades 5, the clamping ring 6 is first removed, and the sleeve connection direction of the sleeve ring 51 and the rotating shaft 4 is adjusted, thereby changing the arc surface direction of the blade 52, and then fixing it by the clamping ring 6, thereby realizing the change of the air inlet and outlet wind direction of the fan.

[0029] During the forward and reverse installation of the fan blades 5, the rotation space of the fan blades 5 remains unchanged, the socket size remains unchanged, and the limiting ridge 41 always remains in cooperation with the limiting slot 53, so the rotation state of the fan blades 5 will not be changed, and no noise or collision will be generated. It is convenient and beautiful to use.

[0030] The utility model adopts a two-way fan with a fan blade, through the separation design of the motor and the fan blade, so that the fan blade can be installed in both directions, and the fan wind direction can be changed simply. During the installation of the fan blade, the projection of the blade on the outer circumference of the sleeve ring is located within the front and rear end surfaces of the sleeve ring, and Figure 3 and Figure 6 As shown, the length of the sleeve ring is smaller than the rotating shaft, and the front and rear ends of the rotating shaft protrude from the end face of the sleeve ring. The above two structural designs can ensure that the blades will not exceed the plane where the end face of the sleeve ring is located when they are installed in the forward and reverse directions, that is, the blades will not contact the motor bracket to produce noise or collision. After the fan blades are installed in reverse, the wind direction of the fan is reversed, that is, there is no need to turn the fan over as a whole, and the motor bracket is still located on the rear side of the fan, ensuring the overall beauty of the front of the fan.

[0031] Although the utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. A two-way fan blade, comprising a main frame, a motor bracket is arranged on the main frame, a motor is installed on the front side of the motor bracket, and a rotating shaft is arranged at the output end of the motor, characterized in that: The rotating shaft is sleeved with fan blades that can be installed in both directions. The fan blades include a sleeve ring, which cooperates with the rotating shaft in the circumferential direction. The front and rear ends of the rotating shaft protrude from the end faces of the sleeve ring. A number of blades are evenly arranged on the outside of the sleeve ring. The projections of the blades on the circumferential direction of the outside of the sleeve ring are all located within the front and rear end faces of the sleeve ring. A clamping ring is arranged on the front end face of the rotating shaft, and the outer diameter of the clamping ring is larger than the inner diameter of the sleeve ring.

2. The bidirectional blade fan according to claim 1, characterized in that: A through cylindrical cavity is provided in the middle of the main frame, and mounting holes are provided at the four corners of the main frame.

3. The bidirectional blade fan according to claim 2, characterized in that: The motor bracket is arranged in the position of the cylindrical cavity near the back of the main frame. The motor bracket includes a mounting ring. A plurality of connecting rods are arranged around the mounting ring. The connecting rods are symmetrical about the axis center of the mounting ring. The other end of the connecting rod is connected to the inner wall of the cylindrical cavity.

4. The bidirectional blade fan according to claim 3, characterized in that: The motor is installed on the inner side of the mounting ring, and the output end of the motor is coaxially arranged with the rotating shaft.

5. The bidirectional blade fan according to claim 1, characterized in that: The outer side of the rotating shaft is provided with a plurality of limiting convex strips, which are parallel to the axial direction of the rotating shaft. The inner side of the sleeve ring is provided with limiting slots having the same number as the limiting convex strips, and the limiting convex strips are slidably clamped in the limiting slots.

6. The bidirectional blade fan according to claim 1, characterized in that: The inner side surface of the clamping ring is tightly fitted with the limiting convex strip protruding from the outer side of the sleeve ring.

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