Air circulation fan with adjustable blowing pitching angle

Abstract

The air circulation fan comprises a base support and a fan body, the fan body comprises a rear air shell and a front air cover, rotating connecting parts are symmetrically arranged on the two sides of the rear air shell, a rotating shaft part is arranged in the center of each rotating connecting part, and a rotating cavity corresponding to the fan body is formed in the base support. Disc-shaped gear plates are oppositely and fixedly arranged on the sides, facing the rotating cavity, of the two sides of the base support, through holes are formed in the centers, corresponding to the rotating shaft parts, of the gear plates, and the rotating shaft parts are rotationally arranged in the through holes; the side, facing the gear plate, of the rotary connecting part extends to be provided with an installation sleeve, the installation sleeve comprises an opening end close to the side of the gear plate and a blocking end away from the side of the gear plate, an elastic piece and a positioning piece are arranged in the installation sleeve, a plurality of positioning grooves are formed in the gear plate in the circumferential direction of the through hole at intervals, and the elastic piece always drives the positioning piece to stretch out of the installation sleeve. And the movement trend is matched with the corresponding positioning groove in a positioning manner. The effects that the blowing pitching angle is adjustable, and positioning is stable after pitching adjustment of the fan body are achieved are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to air circulation fan technical field, especially in a kind of air circulation fan of adjustable blowing pitch angle. BACKGROUND

[0002] Circulating fan is also called electric fan, is a kind of fan blade rotation driven by motor, to achieve the accelerated flow of air, mainly for cooling and air circulation household appliance. Widely used in family, classroom, office, shop, hospital and hotel and other places, the existing circulating fan mostly has left and right swing head function, a few have pitch angle adjustment function, and the existing circulating fan with pitch angle adjustment function in market its left and right swing head linkage structure is more complex, not enough convenient to adjust and pitch angle positioning capacity is insufficient, and urgently needs to be improved. SUMMARY

[0003] The utility model aims at providing a kind of air circulation fan of adjustable blowing pitch angle, with blowing pitch angle adjustable, fan main body pitch adjustment after the effect of stable positioning.

[0004] The above technical purpose of the utility model is realized by the following technical scheme: a kind of air circulation fan of adjustable blowing pitch angle, including base support and fan main body, the fan main body includes rear wind shell, front wind cover being fixed on the rear wind shell, the two sides of the rear wind shell are symmetrically provided with rotating connection part, the center of the rotating connection part is provided with rotating shaft part, the base support is provided with rotating cavity corresponding to the fan main body, the side of the base support towards the rotating cavity is relatively fixed with disc-shaped stop plate, the center of the stop plate is provided with through-hole corresponding to the rotating shaft part, and the rotating shaft part is rotationally arranged in the through-hole;The side of the rotating connection part towards the stop plate is extended and provided with mounting sleeve, the mounting sleeve is eccentrically arranged relative to the rotating shaft part, the mounting sleeve includes opening end close to the side of the stop plate, and the blocking end away from the side of the stop plate, the mounting sleeve is provided with elastic member and positioning member, the stop plate is spaced apart and provided with a plurality of positioning grooves along the circumference of the through-hole, and the elastic member always has the movement tendency of driving the positioning member to extend out of the mounting sleeve and be positioned in the corresponding positioning groove.

[0005] By adopting the above technical scheme, the fan main body is rotated in the rotating cavity by rotating connection part to adjust blowing pitch angle, and the positioning member jumps in adjacent positioning groove when the fan main body rotates, when the fan main body is adjusted to the predetermined blowing pitch angle, the end of the positioning member is locked in the corresponding positioning groove by the elastic member, so that the locking of the fan main body and the stop plate can be realized, since the stop plate is fixedly connected to the base support, so the locking between the fan main body and the base support can be realized, with blowing pitch angle adjustable, fan main body pitch adjustment after the effect of stable positioning.

[0006] The utility model discloses further provide: seven positioning slots are equipped with, and seven positioning slots are equidistantly arranged on the gear plate and are located below the through -hole, and the sector angle alpha between adjacent positioning slots and the center shaft of the through -hole is 20-25 °.

[0007] By adopting the above technical scheme, the fan body can be adjusted at a large range of pitch angles.

[0008] The utility model discloses further provide: the installation column is equipped with to the axial extension of both sides of the through -hole of gear plate, and the mounting hole is seted up to the base support corresponding the installation column, and the installation column is installed in corresponding the mounting hole, makes gear plate with base support stop rotation cooperation.

[0009] By adopting the above technical scheme, by inserting the installation column into the corresponding mounting hole, the installation and fixation of the gear plate on the base support can be realized, and the installation mode is simple and reliable.

[0010] The utility model discloses further provide: angle limiting structure is equipped between the rotary joint and the gear plate, and the fan body can be limited rotation relative to the gear plate through the angle limiting structure.

[0011] By adopting the above technical scheme, the angle limiting structure can prevent the fan body from rotating too much in the rotating cavity, which can cause the failure of cooperation.

[0012] The utility model discloses further provide: the angle limiting structure includes arc limiting slot and limiting post, and the limiting post is convex on the rotary joint, and the arc limiting slot is seted up on the gear plate and is located on the upper portion of the through -hole, and the limiting post is movably arranged in the arc limiting slot and is limited cooperation.

[0013] By adopting the above technical scheme, the fan body can only rotate the sector angle limited by the arc limiting slot.

[0014] The utility model discloses further provide: the angle beta of the arc limiting slot is seted up and is located between 150-170 °.

[0015] The utility model discloses further provide: the end face of the positioning piece near the gear plate side is conical guide surface.

[0016] By adopting the above technical scheme, the situation that the fan body is stuck during rotation can be effectively prevented.

[0017] The utility model discloses further provide: the smooth arc is over between the edge of the positioning slot and the gear plate.

[0018] Through adoption of the above technical scheme, when the fan main body rotates relative to the base support, the positioning member can quickly slide out from the side of the corresponding positioning groove.

[0019] The further setting of the utility model is that the rotating connection part is provided with a plurality of reinforcing ribs along the circumference of the rotating shaft part.

[0020] Through adoption of the above technical scheme, the structural strength of the rotating connection part can be improved.

[0021] The further setting of the utility model is that the side wall of the base support is outwardly provided with a mounting cavity, a protective cover is mounted in the mounting cavity, a clamping block is eccentrically arranged on the end surface of the rotating shaft part, a positioning table is arranged on the side of the protective cover facing the mounting cavity, a clamping groove is arranged in the end part of the positioning table corresponding to the clamping block, the end surface of the rotating shaft part is tightly matched with the positioning table, and the clamping block is rotationally matched with the clamping groove.

[0022] Through adoption of the above technical scheme, the protective cover can improve the mounting efficiency of the rotating shaft part of the fan main body, and simultaneously improve the aesthetic effect.

[0023] In summary, the utility model has the following beneficial effects:

[0024] A stop plate is fixedly connected to the side wall of the rotating cavity on the two sides of the base support, a plurality of positioning grooves are arranged on the stop plate, a mounting sleeve is arranged on the rotating connection part of the two sides of the fan main body, an elastic member and a positioning member are arranged in the mounting sleeve, the fan main body is rotated in the rotating cavity through the rotating connection part to adjust the blowing pitch angle, the positioning member will jump in the adjacent positioning groove when the fan main body rotates, when the fan main body is adjusted to the predetermined blowing pitch angle, the end part of the positioning member is locked in the corresponding positioning groove by the elastic member, so that the locking of the fan main body and the stop plate is realized, since the stop plate is fixedly connected to the base support, the locking between the fan main body and the base support is realized, and the blowing pitch angle can be adjusted, and the positioning of the fan main body after the pitch adjustment is stable. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the overall structure diagram of the utility model.

[0026] Figure 2 It is the local longitudinal section view of the utility model.

[0027] Figure 3 It is the explosion diagram of the utility model.

[0028] Figure 4 It is the local enlarged view of the area A of the utility model. Figure 3

[0029] Figure 5 It is the local enlarged view of the area A of the utility model.​Figure 3 A partial enlarged view of area B in the middle.

[0030] Figure 6 It is the front view of the shift plate of the utility model.

[0031] In the figure: 1. base bracket; 11. rotating cavity; 12. mounting hole; 13. mounting cavity; 2. fan body; 21. rear air shell; 211. rotating connection part; 212. rotating shaft part; 2121. clamping block; 213. mounting sleeve; 2131. opening end; 2132. blocking end; 214. elastic part; 215. positioning part; 216. limiting column; 217. reinforcing rib; 22. front air cover; 3. shift plate; 31. through hole; 32. positioning groove; 33. mounting column; 34. arc limiting groove; 4. protective cover; 41. positioning platform; 411. clamping slot. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the accompanying drawings.

[0033] An air circulation fan with adjustable blowing pitch angle, such as Figures 1-4 As shown, it includes a base bracket 1 and a fan body 2, the fan body 2 includes a rear wind shell 21, a front wind cover 22 fixed on the rear wind shell 21, and a rotating connection part 211 is symmetrically provided on both sides of the rear wind shell 21. A rotating shaft part 212 is provided in the center of the rotating connection part 211. The base bracket 1 is provided with a rotating chamber 11 corresponding to the fan body 2. A disc-shaped shift plate 3 is fixed relatively on both sides of the base bracket 1 facing the rotating chamber 11. A through hole 31 is opened in the center of the shift plate 3 corresponding to the rotating shaft part 212, and the rotating shaft part 212 is rotatably arranged in the through hole 31; a mounting sleeve 213 is provided on one side of the rotating connection part 211 extending toward the shift plate 3. The mounting sleeve 213 is eccentrically arranged relative to the rotating shaft part 212, and the mounting sleeve 213 includes an open end 2131 close to the side of the shift plate 3 and a blocking end 2132 away from the side of the shift plate 3. An elastic member 214 and a positioning member 215 are provided in the mounting sleeve 213. The plate 3 is provided with a plurality of positioning grooves 32 at intervals along the circumference of the through hole 31, and the elastic member 214 always has a movement tendency to drive the positioning member 215 out of the mounting sleeve 213 and to be positioned and matched with the corresponding positioning groove 32; the rotating connection part 211 is provided with a plurality of reinforcing ribs 217 along the circumference of the rotating shaft part 212, which can improve the structural strength of the rotating connection part 211; the side walls on both sides of the base bracket 1 are provided with a mounting cavity 13 facing outward, and a protective cover 4 is installed in the mounting cavity 13, and a clamping block 2121 is eccentrically provided on the end face of the rotating shaft part 212, and a positioning platform 41 is provided on the middle part of the protective cover 4 facing the side of the mounting cavity 13, and a clamping groove 411 is provided on the end of the positioning platform 41 corresponding to the clamping block 2121, and the end face of the rotating shaft part 212 is tightly fitted with the positioning platform 41, and the clamping block 2121 is prevented from rotating with the clamping groove 411, so that the protective cover 4 can improve the installation efficiency of the rotating shaft part 212 of the fan body 2, and at the same time improve the aesthetics.

[0034] As shown in Figures 3-6 The positioning groove 32 is provided with seven, and the seven positioning grooves 32 are equidistantly arranged on the gear plate 3 and located below the through hole 31, the included angle α between the adjacent positioning grooves 32 and the center axis of the through hole 31 is between 20-25°, that is, the fan body 2 can be adjusted at a wide range of pitch angles; the gear plate 3 is axially extended on both sides of the through hole 31 to provide a mounting column 33, the base support 1 is provided with a mounting hole 12 corresponding to the mounting column 33, the mounting column 33 is mounted in the corresponding mounting hole 12, so that the gear plate 3 is rotationally connected with the base support 1, and the gear plate 3 is installed and fixed on the base support 1 by inserting the mounting column 33 into the corresponding mounting hole 12, so that the gear plate 3 is installed and fixed on the base support 1, and the installation mode is simple and reliable; the angle limiting structure is arranged between the rotating connecting part 211 and the gear plate 3, the fan body 2 is limited to rotate relative to the gear plate 3 through the angle limiting structure, and the angle limiting structure can prevent the fan body 2 from being excessively rotated in the rotating cavity 11 to cause a matching failure; the angle limiting structure comprises an arc limiting groove 34 and a limiting column 216, the limiting column 216 is protruded on the rotating connecting part 211, the arc limiting groove 34 is arranged on the gear plate 3 and located on the upper portion of the through hole 31, the limiting column 216 is movably arranged in the arc limiting groove 34 and limitedly connected with the arc limiting groove 34, so that the fan body 2 can only rotate within the sector angle limited by the arc limiting groove 34; the opening of the arc limiting groove 34 has an angle β of 150-170°.

[0035] As shown in Figures 2-4 The end face of the positioning part 215 close to one side of the gear plate 3 is provided with a conical guide surface, which can effectively prevent the fan body 2 from being stuck during rotation; the smooth arc between the edge of the positioning groove 32 and the gear plate 3 is connected, so that the positioning part 215 can quickly slide out from the side of the corresponding positioning groove 32 when the fan body 2 rotates relative to the base support 1.

[0036] The basic working principle of the utility model is as follows: one gear plate 3 is fixedly connected to each side wall of the base support 1 facing the rotating cavity 11, a plurality of positioning grooves 32 are arranged on the gear plate 3, a mounting sleeve 213 is arranged on the rotating connecting part 211 on both sides of the fan body 2, a spring 214 and a positioning part 215 are arranged in the mounting sleeve 213, the fan body 2 is rotated in the rotating cavity 11 through the rotating connecting part 211 to adjust the blowing pitch angle, the positioning part 215 is bounced in the adjacent positioning groove 32 when the fan body 2 rotates, the end part of the positioning part 215 is locked in the corresponding positioning groove 32 by the spring 214 when the fan body 2 is adjusted to the predetermined blowing pitch angle, so that the fan body 2 and the gear plate 3 are locked, since the gear plate 3 is fixedly connected to the base support 1, the fan body 2 and the base support 1 are locked, the blowing pitch angle is adjustable, and the fan body is stably positioned after pitch adjustment.

[0037] The above merely describes preferred embodiments of the present application, and equivalent changes or modifications made in accordance with the structure, features and principles described in the patent application scope of the present application are included in the patent application scope of the present application.

Claims

1. A circulating fan with adjustable blowing pitch angle, characterized in that: The utility model provides a fan, including base support (1) and fan body (2), fan body (2) includes rear wind shell (21), and front wind cover (22) is fixed on rear wind shell (21), and rear wind shell (21) both sides symmetry is equipped with rotation connecting portion (211), and the center of rotation connecting portion (211) is equipped with rotating shaft portion (212), and base support (1) corresponds the rotating cavity (11) of fan body (2) is equipped with, and the side of base support (1) both sides is opposite fixed with disc -shaped stop plate (3) towards rotating cavity (11), and the center of stop plate (3) is equipped with through -hole (31) corresponding rotating shaft portion (212), and rotating shaft portion (212) rotation is equipped in through -hole (31) inside, Rotation connecting portion (211) one side extends and is equipped with mounting sleeve (213) towards stop plate (3), and mounting sleeve (213) is eccentric with rotating shaft portion (212), and mounting sleeve (213) includes the open end (2131) of one side close to stop plate (3), the blocking end (2132) of one side away from stop plate (3), and mounting sleeve (213) is equipped with elastic part (214) and positioning part (215) in, and stop plate (3) is along the circumferential direction of through -hole (31) and is equipped with a plurality of positioning groove (32) interval, and elastic part (214) always has the movement tendency of drive positioning part (215) to extend mounting sleeve (213) and with corresponding positioning groove (32) positioning cooperation.

2. The air circulation fan with adjustable blowing angle according to claim 1, characterized in that: Positioning groove (32) is equipped with seven, and seven positioning groove (32) is equidistantly arranged on stop plate (3) and is located below through -hole (31), and the sector angle alpha between adjacent positioning groove (32) and the center axis of through -hole (31) is arranged between 20-25 °.

3. The air circulation fan with adjustable blowing angle according to claim 1, characterized in that: Stop plate (3) is equipped with mounting column (33) in the axial direction of both sides of through -hole (31), and base support (1) is equipped with mounting hole (12) corresponding mounting column (33), and mounting column (33) is installed in corresponding mounting hole (12), so that stop plate (3) is rotationally cooperated with base support (1).

4. The air circulation fan with adjustable blowing angle according to claim 1, characterized in that: Rotation connecting portion (211) and stop plate (3) are equipped with angle limiting structure, and fan body (2) can be rotationally limited by angle limiting structure relative to stop plate (3).

5. The air circulation fan of claim 4, wherein: Angle limiting structure includes circular arc limiting groove (34) and limiting column (216), limiting column (216) is convex on rotation connecting portion (211), circular arc limiting groove (34) is opened on stop plate (3) and is located on the upper portion of through -hole (31), and limiting column (216) is movably arranged in circular arc limiting groove (34) and is limitedly cooperated.

6. The air circulation fan of claim 5, wherein: The opening of circular arc limiting groove (34) is equipped with angle beta and is arranged between 150-170 °.

7. The air circulation fan of claim 1, wherein: The end face of positioning part (215) close to stop plate (3) side is conical guide surface.

8. The air circulation fan of claim 1, wherein: The edge of positioning groove (32) and stop plate (3) are smoothly arc.

9. The air circulation fan of claim 1, wherein: The rotating connecting part (211) is provided with a plurality of reinforcing ribs (217) along the circumference of the rotating shaft part (212).

10. The air circulation fan of claim 1, wherein: The side walls on both sides of the base support (1) are outwardly provided with mounting cavities (13), the mounting cavities (13) are provided with protective covers (4), the rotating shaft part (212) is eccentrically provided with a clamping block (2121) on the end face, the protective cover (4) is provided with a positioning table (41) on the side facing the mounting cavities (13), the end of the positioning table (41) is provided with a clamping groove (411) corresponding to the clamping block (2121), the end face of the rotating shaft part (212) is tightly matched with the positioning table (41), and the clamping block (2121) is rotationally matched with the clamping groove (411).

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