CN113586488A

CN113586488A - Garden blower

Info

Publication number: CN113586488A
Application number: CN202110760307.1A
Authority: CN
Inventors: 马凯; 彭国华; 韩潭华; 徐佩娜
Original assignee: Zhejiang Lera New Energy Power Technology Co Ltd
Current assignee: Zhejiang Lera New Energy Power Technology Co Ltd
Priority date: 2021-07-06
Filing date: 2021-07-06
Publication date: 2021-11-02

Abstract

The invention provides a garden blower which comprises an air duct pipe body, a fan, a motor and a current collector connected to one end of the air duct pipe body, wherein the fan is coaxially arranged in the air duct pipe body, the motor is arranged outside the air duct pipe body, the fan comprises a fan blade inner ring, a reversing transmission mechanism is arranged between the motor and the fan and comprises a driving part and a driven part, the driving part is connected with the motor, and the driven part is connected with the fan blade inner ring. The motor is arranged outside the air duct pipe body, so that the diameter of the inner ring of the fan blade can be reduced as much as possible, smooth ventilation of the air duct pipe body can be ensured, and the actual ventilation area of the air duct pipe body is increased; and after the diameter of the inner ring of the fan blade is reduced, the distance from the outer wall of the inner ring of the fan blade to the inner wall of the air duct pipe body is increased, and the length of the fan blade can be designed to be as long as possible, so that the air speed and the air quantity of the air duct in the air duct pipe body are greatly increased.

Description

Garden blower

Technical Field

The invention relates to the technical field of garden equipment, in particular to a garden blower.

Background

The garden blower drives the fan to rotate through the motor in the garden blower to generate air flow, so that the garden blower is used for blowing fallen leaves or removing dust and the like. The garden blower generally comprises a motor, an output shaft and a fan which are connected in sequence, but the motor, the output shaft and the fan of the existing garden blower are all positioned on the same axis in an air duct, and in order to ensure smooth ventilation in the air duct, the diameter of the inner ring of the fan blade is generally not smaller than the outer diameter of the motor, so that the diameter of the inner ring of the fan blade needs to be designed into a larger value, the actual ventilation sectional area of the air duct is smaller, and the ventilation quantity is influenced; and under the fixed unchangeable condition in the internal diameter in wind channel, for the inner wall in wind channel is not interfered to when the fan rotates, the blade length of fan also can receive the restriction, and what blade length can do is shorter promptly to the problem that the wind volume is little has leaded to the wind channel.

Disclosure of Invention

In order to solve at least one of the above problems, the invention provides a garden blower, which comprises an air duct pipe, a fan, a motor and a current collector connected to one end of the air duct pipe, wherein the fan is coaxially arranged in the air duct pipe, the motor is arranged outside the air duct pipe, the fan comprises a fan blade inner ring, a reversing transmission mechanism is arranged between the motor and the fan, the reversing transmission mechanism comprises a driving part and a driven part which are mutually connected, the driving part is connected with the motor, and the driven part is connected with the fan blade inner ring.

Compared with the prior art, the garden blower has the advantages that the motor is arranged outside the air duct pipe, and the diameter of the inner ring of the fan blade is designed to be not limited by the diameter of the motor, so that the diameter of the inner ring of the fan blade can be reduced as much as possible, smooth ventilation of the air duct pipe is guaranteed, and the actual ventilation area of the air duct pipe is increased; and after the diameter of the inner ring of the fan blade is reduced, the distance from the outer wall of the inner ring of the fan blade to the inner wall of the air duct pipe body is increased, and the length of the fan blade can be designed to be as long as possible, so that the air speed and the air quantity of the air duct in the air duct pipe body are greatly increased.

Optionally, the number of the fans is two, the fans are respectively a first fan and a second fan which are arranged at intervals along the axial direction of the air duct pipe body, the first fan and the second fan are respectively connected with one driven part, and the two driven parts are respectively connected with the driving part.

Compared with the prior art, the garden blower disclosed by the invention has the advantages that the air speed and the air quantity of the air duct in the air duct pipe body can be greatly increased by arranging the two fans; and when the original same wind speed efficiency is maintained, the performance requirement of the motor can be properly reduced, and the purpose of reducing the cost is achieved.

Optionally, the driving member is a driving bevel gear, the driven member is a driven bevel gear, and the driving bevel gear is engaged with the driven bevel gear.

Compared with the prior art, the garden blower adopts the gear press-fitting structure that the driving bevel gear and the driven bevel gear are meshed with each other, and the two fans are driven independently, so that the requirement on the assembly precision can be greatly reduced.

Optionally, the reference circle diameter of the driving bevel gear is larger than the reference circle diameter of the driven bevel gear.

Compared with the prior art, the garden blower provided by the invention has the advantages that on the premise of maintaining the original rotating speed of the fan, when the transmission ratio is larger than the original rotating speed, the driven bevel gear can also run at a speed not lower than the original rotating speed when the rotating speed of the driving bevel gear is reduced, so that the requirement on the torque of the motor can be reduced, the cost of the motor is reduced, and the purpose of saving the cost is achieved.

Optionally, a maximum cross section of the fan blade inner ring along a direction perpendicular to the fan axis is a first cross section, and the first cross section is smaller than a radial cross section of the motor.

Optionally, the reversing transmission mechanism further comprises a rotating shaft assembly, the rotating shaft assembly comprises a rotating shaft, one end of the rotating shaft is connected with the fan blade inner ring, and the other end of the rotating shaft is connected with the driven member.

Optionally, the air duct further comprises a shaft support frame for supporting the rotating shaft, and the shaft support frame is connected with the inner wall of the air duct body.

Compared with the prior art, the garden blower is additionally provided with the shaft support frame to support the rotating shaft, so that the transmission of the reversing transmission mechanism is more stable.

Optionally, the shaft support bracket has a first receiving cavity, and the driving member and the driven member are both disposed in the first receiving cavity.

Optionally, the rotating shaft assembly further comprises a bearing sleeved outside the rotating shaft.

Compared with the prior art, the garden blower is characterized in that the bearing is additionally arranged outside the rotating shaft, so that the rotating friction force of the rotating shaft can be reduced, and the transmission efficiency of the rotating shaft assembly is better.

Optionally, the shaft support bracket is provided with a second receiving cavity for mounting the bearing.

Compared with the prior art, the garden blower is provided with the second containing cavity, so that the garden blower can contain the bearing, prevents foreign matters in the air duct from being clamped into the bearing, and can support the rotating shaft, and the transmission of the rotating shaft assembly is more stable.

Drawings

FIG. 1 is a first partial block diagram of a garden blower according to an embodiment of the present invention;

FIG. 2 is a second partial block diagram of a garden blower according to an embodiment of the present invention;

FIG. 3 is a third partial block diagram of a garden blower according to an embodiment of the present invention;

fig. 4 is a partial structural view of a garden blower according to an embodiment of the present invention;

fig. 5 is a block diagram of a garden blower according to an embodiment of the present invention.

Description of reference numerals:

1. an air duct body; 2. a fan; 21. the inner ring of the fan blade; 22. a blade; 23. a first fan; 24. a second fan; 3. a motor; 31. a motor shaft; 4. a reversing transmission mechanism; 41. a driving member; 42. a driven member; 43. a rotating shaft assembly; 431. a rotating shaft; 432. a bearing; 5. an axle support; 51. a first accommodating chamber; 52. a second accommodating chamber; 6. a current collector.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the description of the present invention, it is to be understood that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the normal use of a product.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

The embodiment of the invention provides a garden blower, which is shown in a combined figure 1 and a figure 2 and comprises an air duct pipe body 1, a fan 2, a motor 3 and a current collector 6 connected to one end of the air duct pipe body 1, wherein the current collector 6 is arranged at the tail part of the air duct pipe body 1 and is an air inlet end of the garden blower; the fan 2 is coaxially arranged in the air duct body 1, the motor 3 is arranged outside the air duct body 1, the fan 2 comprises a fan blade inner ring 21, a reversing transmission mechanism 4 is arranged between the motor 3 and the fan 2, the reversing transmission mechanism 4 comprises a driving part 41 and a driven part 42 which are mutually connected, the driving part 41 is connected with the motor 3, and the driven part 42 is connected with the fan blade inner ring 21.

The garden blower further comprises a handle and a guide cone, the handle is used for facilitating a user to operate the garden blower, and the guide cone is used for reducing wind resistance and improving the air inlet effect, so that the efficiency of the garden blower is improved; a motor shaft 31 of the motor 3 penetrates through the inner wall of the air duct body 1, the motor shaft 31 is perpendicular to the axis of the air duct body 1, and the driving part 41 is connected with the motor shaft 31; the plurality of blades 22 are arranged on the circumferential outer side wall of the fan blade inner ring 21, and the plurality of blades 22 are uniformly arranged on the circumferential outer side wall of the fan blade inner ring 21 at intervals; the fan 2 and the air duct body 1 are coaxially arranged, that is, the axis of the fan 2 is superposed with the axis of the air duct body 1, so that the size of the blades 22 of the fan 2 in the air duct body 1 can be as large as possible, the air output is increased, and the air output is uniform; when the motor 3 works, the motor shaft 31 drives the driving part 41 to rotate, the driving part 41 drives the driven part 42 to rotate, and the driven part 42 drives the fan blade inner ring 21 to rotate, so that the fan 2 rotates.

The maximum section of the fan blade inner ring 21 in the direction perpendicular to the axis of the fan 2 is a first section, and the first section is smaller than the radial section of the motor 3; the axial direction of the fan 2 is consistent with the flowing direction of wind in the air duct body 1, and the radial section of the motor 3 is the section of the motor 3 along the axial direction vertical to the motor 3; the reversing transmission mechanism 4 can be a gear transmission mechanism, a chain transmission mechanism or a belt transmission mechanism, and the specific structure can be designed according to the requirement; the motor 3 is arranged outside the air duct body 1, so that the area of the first section can be designed to be smaller than the area of the radial section of the motor 3, the diameter of the inner ring 21 of the fan blade can be reduced, and the ventilation area in the air duct body 1 is increased; the largest section of the driven member 42 along the direction perpendicular to the axis of the fan 2 is a second section, and the second section is not larger than the first section, so as to ensure smooth ventilation in the air duct body 1.

The actual ventilation area of the fan 2 is S1, the sectional area of the fan blade inner ring 21 is S2, and the requirements of S1 are as follows: s2 is more than or equal to 3, so that the ventilation quantity of the air duct body 1 is ensured to be large enough; the actual ventilation area of the fan 2 is the area obtained by subtracting the sectional area of the blade 22 from the sectional area of the space between the outer wall of the blade inner ring 21 and the inner wall of the air duct body 1; the sectional areas referred to herein are all sectional areas perpendicular to the axial direction of the duct body 1.

In the garden blower in the embodiment, the motor 3 is arranged outside the air duct body 1, and the diameter of the inner ring 21 of the fan blade is designed to be not limited by the diameter of the motor 3, so that the diameter of the inner ring 21 of the fan blade can be reduced as much as possible, smooth ventilation of the air duct body 1 can be ensured, and the actual ventilation area of the air duct body 1 is increased; and after the diameter of the inner ring 21 of the fan blade is reduced, the distance from the outer wall of the inner ring 21 of the fan blade to the inner wall of the air duct body 1 is increased, and the length of the blades 22 of the fan 2 can be designed to be as long as possible, so that the air speed and the air volume of the air duct in the air duct body 1 are greatly increased.

Optionally, as shown in fig. 2, the number of the fans 2 is two, the fans are respectively a first fan 23 and a second fan 24 that are arranged at intervals along the axial direction of the air duct body 1, the first fan 23 and the second fan 24 are respectively connected with one driven member 42, and the two driven members 42 are respectively coupled with the driving member 41.

The first fan 23 and the second fan 24 are respectively connected with the driving part 41 through the driven parts 42, the first fan 23 and the second fan 24 are respectively located at two sides of the driving part 41, and the two driven parts 42 are oppositely arranged, so that the operation of driving the two fans 2 to rotate through one motor 3 is realized.

In the garden blower in the embodiment, the two fans 2 are arranged, so that the air speed and the air quantity of the air channel in the air channel pipe body 1 can be greatly increased; and when the original same wind speed efficiency is maintained, the performance requirement of the motor 3 can be properly reduced, and the purpose of reducing the cost is achieved.

The motor is arranged at the rear, and the motor is connected with the two fans through the shaft, so that the motor and the two fans are located on the same axis, and the structure has high requirements on assembly precision. Therefore, in this embodiment, as shown in fig. 2, the driving member 41 is a driving bevel gear, and the driven member 42 is a driven bevel gear, and the driving bevel gear is engaged with the driven bevel gear.

Wherein, when the quantity of fan 2 is two, be connected with a driven bevel gear on every fan 2, two driven bevel gears mesh with the left and right sides of drive bevel gear respectively, and when motor 3 during operation, drive bevel gear drives two driven bevel gear rotations, finally drives two fans 2 and rotates.

The gardens hair-dryer in this embodiment adopts this kind of gear pressure equipment structure of initiative bevel gear and driven bevel gear intermeshing, and is the independent transmission between two fans 2, can greatly reduced to the requirement of assembly precision.

Optionally, the reference circle diameter of the driving bevel gear is larger than that of the driven bevel gear, so that the transmission ratio is larger than 1, and the rotating speed of the fan 2 is larger than that of the motor 3.

In order to increase the rotation speed of the fan, the reference circle diameter of the driving bevel gear is made smaller than the reference circle diameters of the two driven bevel gears, that is, the rotation speed is increased by adjusting the transmission ratio, but when the transmission ratio is increased, the torque of the motor 3 is increased, so that the performance requirement on the motor 3 is also increased, the power of the motor 3 is reduced in order to prevent the energy consumption of the motor 3 from being increased, and the original rotation speed of the fan can be maintained finally. Specifically, for example, the double-fan structure using two fans 2 increases the ventilation efficiency by 1.2 times compared with the original single-fan structure, but the performance of the motor 3 can be properly reduced by only increasing the ventilation efficiency by 1.1 times, so that the motor cost can be reduced, and the manufacturing cost of the whole structure can also be reduced.

In the garden blower in this embodiment, on the premise of maintaining the original rotation speed of the fan 2, when the transmission ratio is greater than 1, the driven bevel gear can also operate at a speed not lower than the original rotation speed when the rotation speed of the driving bevel gear is reduced, so that the requirement on the torque of the motor 3 can be reduced, the cost of the motor 3 is also reduced, and the purpose of saving the cost is achieved.

Optionally, as shown in fig. 2 and fig. 3, the reversing transmission mechanism 4 further includes a rotating shaft assembly 43, where the rotating shaft assembly 43 includes a rotating shaft 431, and one end of the rotating shaft 431 is connected to the fan blade inner ring 21, and the other end is connected to the driven member 42.

A fan insert is arranged between the rotating shaft 431 and the blade inner ring 21, and the rotating shaft 431 is fixedly connected with the blade inner ring 21 through the fan insert so as to ensure that the rotating shaft 431 can drive the fan 2 to rotate synchronously.

Optionally, as shown in fig. 3 and 4, a shaft support 5 is further included for supporting the rotating shaft 431, and the shaft support 5 is connected to an inner wall of the duct body 1.

The shaft support frame 5 and the air duct body 1 are integrally formed, the shaft support frame 5 is arranged between the two fans 2, and after the shaft support frame 5 is connected with the air duct body 1, channels in the air duct body 1 can be communicated with each other in the axial direction, for example, the shaft support frame 5 and the inner wall of the air duct body 1 are connected through a plurality of connecting strips arranged at intervals.

In the garden blower of the present embodiment, the shaft support frame 5 is additionally provided to support the rotation shaft 431, so that the transmission of the reversing transmission mechanism 4 is more stable.

Alternatively, as shown in fig. 2 and 4, the shaft support 5 has a first accommodating cavity 51, and the driving member 41 and the driven member 42 are both disposed in the first accommodating cavity 51.

The first accommodating cavity 51 is provided with a vent to dissipate heat; the driven part 42 and the driving part 41 are isolated in the first accommodating cavity 51, so that foreign matters in the air duct body 1 are prevented from blocking the reversing transmission mechanism 4; the main body of the shaft support frame 5 is cylindrical, and is coaxially arranged with the air duct body 1, and the diameter of the shaft support frame is not larger than that of the fan blade inner ring 21, so that smooth ventilation of the air duct is ensured.

Optionally, as shown in fig. 3, the rotating shaft assembly 43 further includes a bearing 432 sleeved outside the rotating shaft 431. The diameter of the bearing 432 is smaller than that of the fan blade inner ring 21, so that smooth ventilation of an air duct is ensured.

In the garden blower of this embodiment, the bearing 432 is additionally provided outside the rotating shaft 431, so that the rotating friction of the rotating shaft 431 can be reduced, and the transmission efficiency of the rotating shaft assembly 43 is better.

Optionally, as shown in fig. 3 and 4, the shaft support 5 is provided with a second receiving cavity 52 for mounting the bearing 432. Two second accommodating chambers 52 are provided on the left and right sides of the first accommodating chamber 51, and the respective accommodating chambers are independent of each other.

The garden blower in this embodiment, provided with the second accommodating cavity 52, can accommodate the bearing 432, prevent the air duct from being jammed into the bearing 432, and can support the rotating shaft 431, so that the transmission of the rotating shaft assembly 43 is more stable.

Another embodiment of the invention provides a garden blower, which comprises the garden blower.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.

Claims

1. The utility model provides a gardens hair-dryer, its characterized in that, includes wind channel body (1), fan (2), motor (3) and connects collector (6) of wind channel body (1) one end, fan (2) are coaxial to be located in the wind channel body (1), motor (3) are located outside the wind channel body (1), fan (2) are including fan blade inner circle (21), motor (3) with be equipped with switching-over drive mechanism (4) between fan (2), switching-over drive mechanism (4) are including driving part (41) and follower (42) of interconnect, driving part (41) with motor (3) are connected, follower (42) with fan blade inner circle (21) are connected.

2. The garden blower according to claim 1, wherein the number of the fans (2) is two, the fans are respectively a first fan (23) and a second fan (24) which are arranged at intervals along the axial direction of the air duct body (1), the driven members (42) are respectively connected to the first fan (23) and the second fan (24), and the two driven members (42) are respectively connected with the driving member (41).

3. The garden blower of claim 1, wherein the driving member (41) is a driving bevel gear, and the driven member (42) is a driven bevel gear, the driving bevel gear being engaged with the driven bevel gear.

4. The garden blower of claim 3, wherein the drive bevel gear has a pitch diameter greater than a pitch diameter of the driven bevel gear.

5. The garden blower according to claim 1, characterized in that the largest cross section of the blade inner ring (21) in a direction perpendicular to the axis of the fan (2) is a first cross section, which is smaller than the radial cross section of the motor (3).

6. The garden blower according to any one of claims 1-5, wherein the reversing transmission mechanism (4) further comprises a rotating shaft assembly (43), the rotating shaft assembly (43) comprises a rotating shaft (431), and one end of the rotating shaft (431) is connected with the fan blade inner ring (21) and the other end of the rotating shaft (431) is connected with the driven member (42).

7. The garden blower according to claim 6, further comprising a shaft bracket (5) for supporting the rotating shaft (431), wherein the shaft bracket (5) is connected with an inner wall of the duct body (1).

8. The garden blower according to claim 7, wherein the shaft bracket (5) has a first receiving cavity (51), and the driving member (41) and the driven member (42) are both provided in the first receiving cavity (51).

9. The garden blower of claim 7, wherein the rotating shaft assembly (43) further comprises a bearing (432) sleeved outside the rotating shaft (431).

10. The garden blower according to claim 9, wherein the shaft bracket (5) is provided with a second receiving cavity (52) for mounting the bearing (432).