Variable-speed brushless blower

Abstract

The utility model discloses a variable speed brushless blower, which comprises a shell, a motor, a transmission assembly and fan blades, the motor, the transmission assembly and the fan blades are arranged in the shell, the output end of the motor is connected with the transmission assembly and drives the transmission assembly to rotate, and the output end of the transmission assembly is fixedly connected with the fan blades and drives the fan blades to rotate. The transmission assembly comprises a main shaft and an output shaft which are rotationally connected to the shell and parallel to each other, a spline on the main shaft is connected with an advancing and retreating gear capable of sliding along the main shaft through shifting, and the advancing and retreating gear is provided with a first-gear driving gear and a second-gear driving gear. A first-gear driven gear capable of being meshed with the first-gear driving gear and a second-gear driven gear capable of being meshed with the second-gear driving gear are arranged on the output shaft, and the first-gear driving gear and the second-gear driving gear cannot be meshed at the same time. The first-gear driven gear and the second-gear driven gear are provided with guide notches matched with the first-gear driving gear and the second-gear driving gear respectively, and the guide notches and the racks of the corresponding gears are arranged in a spaced and staggered mode. Compared with the prior art, the wind speed adjusting device has the advantages that the wind speed can be adjusted according to the actual working environment and working requirements, and therefore the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric tools, in particular to a variable-speed brushless hair dryer. Background Art

[0002] The garden machine gasoline blower is an indispensable tool for municipal garden cleaning and greening. It is mainly used to blow away fallen leaves, weeds and other debris to improve work efficiency and reduce the burden of manpower cleaning.

[0003] For example, patent publication number CN217352275U discloses a hair dryer, which includes a hair dryer main body, in which a wind source component is arranged, an air outlet is arranged at the front end of the hair dryer main body, an air inlet is arranged at the rear end of the hair dryer main body, a telescopic rod is arranged at the rear end of the hair dryer main body, a hand-held part is slidably arranged on the telescopic rod, and the hand-held part can move forward and backward along the direction of the telescopic rod.

[0004] During use of the above solution, the wind speed of the hair dryer cannot be adjusted, and the wind speed cannot be adjusted according to the actual working environment and work needs, which brings inconvenience to work. Utility Model Content

[0005] The utility model aims at the problem that the wind speed of a fan cannot be adjusted. The technical problem to be solved by the utility model is to provide a variable-speed brushless hair dryer to solve the above problem.

[0006] The technical solution adopted by the utility model to solve the above technical problems is as follows: it includes a housing, a motor, a transmission assembly and a fan blade arranged in the housing, the output end of the motor is connected to the transmission assembly and drives the transmission assembly to rotate, the output end of the transmission assembly is fixedly connected to the fan blade and drives the fan blade to rotate, the transmission assembly includes a main shaft and an output shaft which are respectively rotatably connected to the housing and are parallel to each other, the main shaft is splined with an advance and retreat gear that can slide along the main shaft by toggling, the advance and retreat gear is provided with a first gear driving gear and a second gear driving gear, the output shaft is provided with a first gear driven gear that can mesh with the first gear driving gear and a second gear driven gear that can mesh with the second gear driving gear The first gear driven gear and the second gear driven gear cannot be meshed at the same time. The first gear driven gear and the second gear driven gear are respectively provided with guide notches that cooperate with the first gear driving gear and the second gear driving gear. The guide notches are staggered with the rack spacing of the corresponding gears. When the advance and retreat gear is turned to make the first gear driving gear mesh with the first gear driven gear, the second gear driving gear is separated from the second gear driven gear. At this time, the output shaft drives the fan blades to rotate at the first gear speed; when the advance and retreat gear is turned to make the second gear driving gear mesh with the second gear driven gear, the first gear driving gear is separated from the first gear driven gear. At this time, the output shaft drives the fan blades to rotate at the second gear speed to adjust the speed of the hair dryer.

[0007] A further preferred solution of the utility model is that the diameters of the first gear driving gear and the second gear driving gear are not equal.

[0008] A further preferred solution of the utility model is that the distance between the first gear driven gear and the second gear driven gear is greater than the length of the advance and retreat gear, and the first gear driving gear and the second gear driving gear slide between the first gear driven gear and the second gear driven gear.

[0009] A further preferred solution of the utility model is that the guide notch of the first gear driven gear is arranged on a side close to the first gear driving gear, and the guide notch of the second gear driven gear is arranged on a side close to the second gear driving gear.

[0010] A further preferred solution of the utility model is: a shaft sleeve integrally formed with the first gear driving gear and the second gear driving gear is provided between the first gear driving gear and the second gear driving gear, a bearing is sleeved on the shaft sleeve, and the bearing has a shifting arm extending out of the housing for shifting the forward and backward gears.

[0011] A further preferred solution of the utility model is: a motor gear is provided on the output end of the motor, a main gear meshing with the motor gear is provided on the main shaft, and the main gear is spline-connected with the main shaft.

[0012] A further preferred solution of the utility model is: a strip hole is provided on the shell along the sliding direction of the forward and backward clutch gear, a push button is provided on the strip hole, the outer end of the lever arm is fixedly connected to the push button, and the push button is pushed to slide on the strip hole to drive the forward and backward clutch gear to slide.

[0013] A further preferred solution of the utility model is: a mounting cylinder is fixedly provided in the shell, the transmission assembly is located in the mounting cylinder, both ends of the main shaft and the output shaft are rotatably connected to the mounting cylinder, and the output end of the output shaft extends through the mounting cylinder and is fixedly connected to the fan blades.

[0014] A further preferred solution of the utility model is that the motor is arranged outside the installation barrel and the output end of the motor extends into the installation barrel and is rotatably connected to the installation barrel through a bearing.

[0015] A further preferred solution of the utility model is that an air outlet is provided at the front end of the shell, and an air inlet is provided at the rear end of the shell.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] 1. By arranging an advance and retreat gear on the main shaft, and sliding the advance and retreat gear on the main shaft, the first gear driving gear is meshed with the first gear driven gear and the second gear driving gear is meshed with the second gear driven gear to switch between each other to achieve the control of the rotation speed of the fan blades, so as to adjust the speed of the hair dryer. The wind speed can be adjusted according to the actual working environment and work needs, thereby improving work efficiency.

[0018] 2. By respectively setting guide notches matching the first gear driving gear and the second gear driving gear on the first gear driven gear and the second gear driven gear, the guide notches are staggered with the rack spacing of the corresponding gears. When shifting, the first gear driving gear and the second gear driving gear can be guided to prevent the first gear main gear from hitting the first gear driven gear and the second gear main gear from hitting the second gear driven gear during the shifting process, thereby reducing the wear of the gears when meshing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and should not be regarded as limiting the scope of the present invention. Furthermore, unless otherwise specified, the drawings only conceptually represent the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of a preferred embodiment of the utility model;

[0021] Figure 2 It is a rear view of a preferred embodiment of the utility model;

[0022] Figure 3 This is the preferred embodiment of the utility model Figure 2 Sectional view of AA in the middle;

[0023] Figure 4 This is the preferred embodiment of the utility model Figure 3 A partial enlarged view of point B in the middle;

[0024] Figure 5 This is a schematic diagram of the three-dimensional structure of the preferred embodiment of the utility model after the shell is disassembled;

[0025] Figure 6 This is a schematic diagram of the internal three-dimensional structure of the first gear driving gear and the first gear driven gear meshing in the preferred embodiment of the utility model;

[0026] Figure 7 This is a schematic diagram of the internal three-dimensional structure of the meshing of the second-gear driving gear and the second-gear driven gear in the preferred embodiment of the utility model.

[0027] In the figure: 1. shell; 11. strip hole; 12. push button; 2. motor; 21. motor gear; 3. transmission assembly; 31. main shaft; 32. output shaft; 33. advance and retract gear; 331. first gear driving gear; 332. second gear driving gear; 34. first gear driven gear; 35. second gear driven gear; 36. guide notch; 37. main gear; 4. fan blade; 5. bushing; 6. lever arm; 7. mounting tube; 8. air outlet; 9. air inlet; 10. strip air hole. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are only descriptive and exemplary and should not be construed as limiting the protection scope of the present invention.

[0029] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0030] This embodiment mainly describes a variable speed brushless hair dryer, which is as follows:

[0031] like Figures 1 to 7As shown, a variable speed brushless hair dryer includes a housing 1, a motor 2, a transmission assembly 3 and a fan blade 4 arranged in the housing 1, the motor 2 is connected to a power source, the motor is a brushless motor 2, the output end of the motor 2 is connected to the transmission assembly 3 and will drive the transmission assembly 3 to rotate, the output end of the transmission assembly 3 is fixedly connected to the fan blade 4 and drives the fan blade 4 to rotate, the transmission assembly 3 includes a main shaft 31 and an output shaft 32 which are respectively rotatably connected to the housing 1 and are parallel to each other, the main shaft 31 is provided with an external spline, the external spline is provided with a spline which can slide along the external spline and has an internal spline The main shaft 31 is connected to the advance and retreat gear 33 through a spline, and the advance and retreat gear 33 can slide along the external spline on the main shaft 31 by toggling, the advance and retreat gear 33 has a first gear driving gear 331 and a second gear driving gear, the output shaft 32 is provided with a first gear driven gear 34 that can mesh with the first gear driving gear 331 and a second gear driven gear that can mesh with the second gear driving gear 332, and the first gear driving gear 331 and the second gear driving gear 332 cannot mesh at the same time, the diameters of the first gear driving gear 331 and the second gear driving gear 332 are different, the first gear driving gear 331 and the second gear driving gear 332 are different, and the first gear driving gear 331 and the second gear driving gear 332 are different. The major diameter of the driving gear 331 is larger than that of the second gear driving gear 332. The first gear driven gear 34 and the second gear driven gear are respectively provided with guide notches 36 that cooperate with the first gear driving gear 331 and the second gear driving gear. The guide notches 36 are staggered with the rack spacing of the corresponding gears. The guide notches 36 are mainly used to guide the first gear driving gear 331 and the second gear driving gear during the gear shifting process to prevent the first gear main gear 37 from colliding with the first gear driven gear 34 and the second gear main gear 37 from colliding with the second gear driven gear 35, thereby reducing the gears in the gear shifting process. Wear during meshing: when the advance / retract gear 33 is moved to make the first gear driving gear 331 mesh with the first gear driven gear 34, the second gear driving gear 332 is separated from the second gear driven gear 35. At this time, the output shaft 32 drives the fan to rotate at the first gear speed; when the advance / retract gear 33 is moved to make the second gear driving gear 35 mesh with the second gear driven gear 35, the first gear driving gear 331 is separated from the first gear driven gear 34. At this time, the output shaft 32 drives the fan to rotate at the second gear speed to adjust the speed of the hair dryer. The wind speed can be adjusted according to the actual working environment and work needs, thereby improving work efficiency.

[0032] The distance between the first gear driven gear 34 and the second gear driven gear is greater than the length of the forward and reverse gear 33, and the first gear driving gear 331 and the second gear driving gear slide between the first gear driven gear 34 and the second gear driven gear. When the first gear driving gear 331 and the second gear driving gear slide to between the first gear driven gear 34 and the second gear driven gear, they are neither meshed with the first gear driving gear 331 nor with the second gear driving gear, and are in a neutral state.

[0033] like Figure 6 and Figure 7As shown, the guide notch 36 of the first gear driven gear 34 is arranged on a side close to the first gear driving gear 331, and the guide notch 36 of the second gear driven gear 35 is arranged on a side close to the second gear driving gear. When shifting gears, the first gear driving gear 331 is moved to cooperate with the first gear driving gear 331, or the second gear driving gear 332 is moved to cooperate with the second gear driven gear, and the first gear main gear gear or the second gear driving gear 332 can be rotated to the guide notch 36. After being guided by the guide notch 36, the first gear driving gear 331 can be quickly meshed with the first gear driven gear 34, or the second gear driving gear 332 can be meshed with the second gear driven gear 35.

[0034] Specifically, there is a shaft sleeve 5 formed integrally with the first gear driving gear 331 and the second gear driving gear between the first gear driving gear 331 and the second gear driving gear, and a bearing is sleeved on the shaft sleeve 5. The shaft sleeve 5 can rotate in the bearing, and the bearing has a lever arm 6 extending from the housing 1 for shifting the advance and retract gear 33. By pushing the lever arm 6, the advance and retract gear 33 can be pushed to engage with the first gear driving gear 331 or the second gear driving gear 332, thereby realizing speed shifting.

[0035] like Figure 4 , Figure 6 and Figure 7 As shown, the output end of the motor 2 is provided with a motor gear 21, and the main shaft 31 is provided with a main gear 37 meshing with the motor gear 21. The main gear 37 is spline-connected to the main shaft 31. When the motor 2 rotates, the motor gear 21 drives the main gear 37 to rotate, thereby driving the main shaft 31 to rotate with the main gear 37.

[0036] Specifically, the shell 1 is provided with a strip hole 11 arranged along the sliding direction of the forward and reverse clutch gear, and a push button 12 is provided on the strip hole 11. The outer end of the lever arm 6 is fixedly connected to the push button 12. The push button 12 is pushed to slide on the strip hole 11, thereby driving the forward and reverse clutch gear to slide, so that the first gear driving gear 331 on the forward and reverse clutch gear is engaged with the first gear driven gear 34 or the second gear driving gear 332 is engaged with the second gear driven gear 35 to switch, thereby realizing the speed shifting of the hair dryer.

[0037] Specifically, a mounting tube 7 is fixedly provided in the housing 1, and the transmission assembly 3 is located in the mounting tube 7. The mounting tube 7 can protect the transmission assembly 3 in the tube. The two ends of the main shaft 31 and the output shaft 32 are rotatably connected to the mounting tube 7 through bearings, and the output end of the output shaft 32 extends through the mounting tube 7 and is fixedly connected to the fan blade 4. The mounting tube 7 has a waist-shaped hole for the lever arm 6 to pass through, and the waist-shaped hole is used to prevent the lever arm 6 from interfering with the lever arm 6 when the lever arm 6 moves with the push button 12. The waist-shaped hole corresponds to the strip hole 11. When the push button 12 is pushed, the lever arm 6 slides in the waist-shaped hole, thereby driving the advance and retreat gear 33 to slide. The motor 2 is provided with an outer side of the mounting tube 7, and the output end of the motor 2 extends into the mounting barrel and is rotatably connected to the mounting tube 7 through a bearing.

[0038] Specifically, an air outlet 8 is provided at the front end of the shell 1, and an air inlet 9 is provided at the rear end of the shell 1. Strip air holes 2 are provided at the corresponding positions of the shell 1 and the mounting tube 7 for increasing the amount of air intake. When the fan blades 4 rotate with the transmission assembly 3, wind enters from the air inlet 9 and the strip air holes 2, and is blown out from the air outlet 8 to work.

[0039] Working principle: start the motor 2, the motor gear 21 on the motor 2 rotates to drive the main gear 37 on the main shaft 31 to rotate, thereby driving the advance and retreat gear 33 on the main shaft 31 to rotate; when the advance and retreat gear 33 is turned to make the first gear driving gear 331 mesh with the first gear driven gear 34, the second gear driving gear 332 is separated from the second gear driven gear 35, and at this time the output shaft 32 drives the fan blades 4 to rotate at the first gear speed; when the advance and retreat gear 33 is turned to make the second gear driving gear mesh with the second gear driven gear 35, the first gear driving gear 331 is separated from the first gear driven gear 34, and at this time the output shaft 32 drives the fan blades 4 to rotate at the second gear speed to adjust the speed of the hair dryer.

[0040] In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "back", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0041] The above is a detailed introduction to a variable speed brushless hair dryer provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the utility model and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified. These improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A variable speed brushless hair dryer, comprising a housing, a motor, a transmission assembly and a fan blade arranged in the housing, wherein the output end of the motor is connected to the transmission assembly and drives the transmission assembly to rotate, and the output end of the transmission assembly is fixedly connected to the fan blade and drives the fan blade to rotate, characterized in that: The transmission assembly includes a main shaft and an output shaft which are respectively rotatably connected to the housing and are parallel to each other. The main shaft is splined with an advance and retreat gear which can slide along the main shaft by being toggled. The advance and retreat gear is provided with a first gear driving gear and a second gear driving gear. The output shaft is provided with a first gear driven gear which can mesh with the first gear driving gear and a second gear driven gear which can mesh with the second gear driving gear. The first gear driving gear and the second gear driving gear cannot mesh with each other at the same time. The first gear driven gear and the second gear driven gear are respectively provided with guide notches which match with the first gear driving gear and the second gear driving gear. The guide notches are staggered with the rack spacing of the corresponding gears. When the advance and retreat gear is toggled to make the first gear driving gear mesh with the first gear driven gear, the second gear driving gear is separated from the second gear driven gear. At this time, the output shaft drives the fan blades to rotate at a first gear speed. When the advance and retreat gear is toggled to make the second gear driving gear mesh with the second gear driven gear, the first gear driving gear is separated from the first gear driven gear. At this time, the output shaft drives the fan blades to rotate at a second gear speed to adjust the speed of the hair dryer.

2. A variable speed brushless hair dryer according to claim 1, characterized in that: The diameters of the first gear driving gear and the second gear driving gear are different.

3. A variable speed brushless hair dryer according to claim 1, characterized in that: The distance between the first gear driven gear and the second gear driven gear is greater than the length of the forward and reverse gears, and the first gear driving gear and the second gear driving gear slide between the first gear driven gear and the second gear driven gear.

4. A variable speed brushless hair dryer according to claim 1, characterized in that: The guide notch of the first-gear driven gear is arranged on a side close to the first-gear driving gear, and the guide notch of the second-gear driven gear is arranged on a side close to the second-gear driving gear.

5. The variable speed brushless hair dryer according to claim 1, characterized in that: A shaft sleeve integrally formed with the first gear driving gear and the second gear driving gear is provided between the first gear driving gear and the second gear driving gear, a bearing is sleeved on the shaft sleeve, and a shifting arm extending out of the housing is provided on the bearing for shifting the forward and backward gears.

6. A variable speed brushless hair dryer according to claim 1, characterized in that: The output end of the motor is provided with a motor gear, the main shaft is provided with a main gear meshing with the motor gear, and the main gear is spline-connected with the main shaft.

7. A variable speed brushless hair dryer according to claim 5, characterized in that: The shell is provided with a strip hole arranged along the sliding direction of the forward and backward clutch gear, and a push button is provided on the strip hole. The outer end of the lever arm is fixedly connected to the push button, and the push button is pushed to slide on the strip hole to drive the forward and backward clutch gear to slide.

8. The variable speed brushless hair dryer according to claim 1, characterized in that: A mounting cylinder is fixedly provided in the shell, the transmission assembly is located in the mounting cylinder, the main shaft and the output shaft are rotatably connected to the mounting cylinder at both ends, and the output end of the output shaft extends through the mounting cylinder and is fixedly connected to the fan blades.

9. A variable speed brushless hair dryer according to claim 8, characterized in that: The motor is arranged outside the installation barrel, and the output end of the motor extends into the installation barrel and is rotatably connected to the installation barrel through a bearing.

10. The variable speed brushless hair dryer according to claim 1, characterized in that: The front end of the shell is provided with an air outlet, and the rear end of the shell is provided with an air inlet.

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