CN214530435U - Blowing head and portable detachable blowing device with same - Google Patents

Abstract

The utility model relates to a blowing head and have its portable removable blast apparatus, the blowing head is used for blast apparatus, the blowing head includes the volute, sets up fan unit in the volute to and at least one linkage unit, the fan unit includes fan and acceleration rate drive unit, the linkage unit includes the drive connecting element; when the blowing head is detachably mounted on a driving device comprising a speed reduction driven unit, the speed increase transmission unit is in power coupling with the speed reduction driven unit through the driving connecting element, so that the driving device can apply a first rotating speed reduced by the speed reduction driven unit to the speed increase transmission unit and drive the fan to rotate at a second rotating speed which is greater than the first rotating speed. Implement the utility model discloses, can solve the problem that electric tool occupation space is big and the function is single of blowing.

Description

Blowing head and portable detachable blowing device with same

Technical Field

The utility model relates to an electric tool field, in particular to blowing head and have its portable removable blast apparatus.

Background

Along with the improvement of standard of living, people begin to regard the afforestation in the life gradually, and afforestation places such as flower bed, courtyard, gardens are more and more common, along with the gradual generalization of afforestation place, and the maintenance in these afforestation places also becomes an important problem, if maintain untimely, not only can not give other people bring the enjoyment of vision, and the environment of elaeagous waste still can aggravate people's tired sense, influences people's normal life.

The electric tool who possesses the function of blowing is a comparatively common garden instrument, generally is used for the clearance of debris such as fallen leaves, dust, and at present, the electric tool of blowing on the market sets up as an organic whole usually, and such electric tool of blowing need occupy great space usually to, the electric tool of blowing of integrative setting also only possesses the function of blowing usually, and it can't satisfy the diversified demand that horticulture was maintained.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a head of blowing and have its portable removable blast apparatus to solve the problem that the electric tool occupation space of blowing is big and the function is single among the prior art.

The utility model provides a blowing head for a blowing device, the blowing head comprises a volute, a fan unit arranged in the volute and at least one connecting unit, the fan unit comprises a fan and an acceleration transmission unit, and the connecting unit comprises a driving connecting element; when the blowing head is detachably mounted on a driving device comprising a speed reduction driven unit, the speed increase transmission unit is in power coupling with the speed reduction driven unit through the driving connecting element, so that the driving device can apply a first rotating speed reduced by the speed reduction driven unit to the speed increase transmission unit and drive the fan to rotate at a second rotating speed which is greater than the first rotating speed; wherein the fan comprises a plurality of fan blades for driving the air to flow.

Further, the step-up transmission unit includes at least two transmission elements having different diameters, wherein a transmission ratio of the transmission element for inputting power to the transmission element for outputting power therein is less than 1.

Further, the blowing head further comprises at least one air duct, the volute comprises at least one air outlet channel, the area of the air duct, which is used for being in contact with the air outlet channel, is configured into a first shape, and the area of the air outlet channel, which is used for being in contact with the air duct, is configured into a second shape, which can be in sealing connection with the first shape.

Further, the dryer including be used for with air-out access connection's first nozzle, first shape is for following the circumference of first nozzle forms, exists with the closed circuit form and has spacing portion's sealed muscle, the second shape be protrusion in air-out access's surface and with spacing portion corresponds the arch that sets up, works as the dryer with air-out access sealing connection, protruding joint in spacing portion, air-out access be located protruding peripheral surface supports and leans on the sealed muscle.

Furthermore, the air outlet channel is arranged along the circumferential direction of the volute, the air duct and the air outlet channel are provided with the same first axis, and when the blowing head is installed on a driving device comprising a handle, the included angle between the first axis and the second axis of the handle is smaller than or equal to a preset included angle.

Furthermore, the speed-increasing transmission unit further comprises an output end connected with the fan, the output end is arranged close to the central area of the volute, and the driving connection element is arranged close to the air outlet channel.

Furthermore, the volute includes first volute and the second volute that the connection can be dismantled that sets up relatively, the edge connection position of at least one in first volute and the second volute includes the direction sealing member that circumference set up, the direction sealing member is followed the axial length more than or equal to of volute predetermines length, when first volute with the second volute is connected, the volute can be with the help of the direction sealing member realizes leading, when first volute with the back is connected to the second volute, the volute can realize sealed with the help of the direction sealing member.

Furthermore, the connection unit comprises a first locking element, by means of which the blowing head can be connected in a form-locking and/or force-locking manner when the blowing head is mounted on the drive comprising a first mounting element.

Further, the first locking assembly is constructed to be a second clamping unit, and when the blowing head comprising the second clamping unit is installed on the driving device comprising the first installation assembly, the blowing head can be in clamping fit with the first installation assembly constructed to be a first clamping unit by means of the second clamping unit.

The utility model also provides a portable detachable blowing device, including drive arrangement and arbitrary the blowing head, drive arrangement includes speed reduction driven unit, the blowing head includes the volute, set up in the fan unit of volute to and at least one linkage unit, the fan unit includes fan and acceleration rate drive unit, the linkage unit includes the drive connecting element; when the blowing head is detachably mounted on the driving device, the speed-increasing transmission unit is in power coupling with the speed-reducing driven unit through the driving connecting element, so that the driving device can apply a first rotating speed reduced by the speed-reducing driven unit to the speed-increasing transmission unit and drive the fan to rotate at a second rotating speed which is greater than the first rotating speed.

Because of the technical scheme, the utility model discloses following beneficial effect has:

the utility model provides a blowing head can be independent of drive arrangement and accomodate, has reduced and has accomodate the space that occupies to, blowing head can dismantle, is convenient for blow the change of head.

The utility model provides a portable removable blast apparatus's head of blowing can be dismantled, when facing other horticulture maintenance demands, can replace portable removable blast apparatus's head of blowing into the instrument head of other needs to satisfy the diversified demand that the horticulture was maintained.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiment or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic top view of a blowing head according to an embodiment of the present invention;

fig. 2 is a schematic bottom view of a blowing head according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a blowing head provided by an embodiment of the present invention after a cover plate is removed;

fig. 4 is a schematic structural diagram of a blowing head provided by an embodiment of the present invention after a second scroll is removed;

fig. 5 is a schematic structural diagram of an air duct of a blowing head according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a blowing head provided in an embodiment of the present invention after a first scroll is removed;

fig. 7 is a schematic structural diagram of a driving device in a portable detachable blowing device according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a portable detachable blowing device according to an embodiment of the present invention, in which a driving device is partially cut away;

fig. 9 is a schematic structural diagram of a driving unit and a deceleration driven unit in a portable detachable blowing device according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of another tool bit according to an embodiment of the present invention.

In the drawings:

1-a shell, 2-a driving unit, 3-a deceleration driven unit, 4-a volute, 5-a speed-increasing transmission unit, 6-a fan, 7-an air duct and 8-a cover plate;

11-a first clamping unit, 12-a second mounting hole and 13-a first locking unit;

31-third gear, 32-linkage gear, 33-fourth gear, 34-driven element;

41-an air inlet, 42-a second clamping unit, 43-an air outlet channel, 44-a bulge and 45-a first volute; 46-a second volute;

51-drive connection element, 52-first gear, 53-second gear, 54-output;

71-first nozzle, 72-second nozzle;

81-a first mounting hole;

111-a first limit hole, 112-a first stop member, 113-a second stop member;

131-a second limit table, 132-a fixed table;

321-input gear, 322-output gear;

421-a first limit table, 422-a first clamping piece and 423-a second clamping piece;

451-claws, 452-connecting seats, 453-guide sealing parts, 454-grooves, 455-through holes and 461-clamping grooves;

711-sealing ribs, 712-bending parts;

4521-holding chamber;

90-second locking unit, 901-second limiting hole, 902-bridge.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It should be noted that the terms "first", "second", and the like in the description and in the claims and in the drawings of the present invention are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

Example 1

As shown in fig. 1 to 6, the embodiment of the present invention provides a blowing head for a blowing device, the blowing head includes a scroll 4, a fan unit disposed in the scroll, and at least one connection unit, the fan unit includes a fan 6 and a speed-increasing transmission unit 5, the connection unit includes a driving connection element 51;

when the blowing head is detachably mounted on a driving device including a speed reduction driven unit 3, the speed increase transmission unit 5 is in power coupling with the speed reduction driven unit 3 through the driving connection element 51, so that the driving device can apply a first rotating speed reduced by the speed reduction driven unit 3 to the speed increase transmission unit 5 and drive the fan 6 to rotate at a second rotating speed greater than the first rotating speed.

The fan 6 comprises a plurality of fan blades for driving air to flow; wherein, in order to ensure the rotational stability of the fan, the number of the fan blades is limited to be at least three.

Specifically, the scroll 4 may include an air inlet 41 and an air outlet channel 43, where the air inlet 41 is used for sucking external air, and the air outlet channel 43 is used for discharging accelerated airflow generated by the rotation of the fan 6.

The driving connection element 51 may include a plurality of teeth uniformly arranged along the circumferential direction, the teeth of the driving connection element 51 are provided with inclined guide slopes, correspondingly, the speed reduction driven unit 3 includes a driven element, the driven element also includes a plurality of teeth uniformly arranged along the circumferential direction, each tooth on the driven element also has an inclined guide slope, and the guide slopes of the teeth on the driven element and the guide slopes of the teeth on the meshing part are arranged just opposite to each other, that is, the guide slopes of the meshing part are arranged on the right side of the teeth, the guide slopes of the driven element are arranged on the left side of the teeth, and the number and the spacing arrangement of the teeth are also matched with each other, so that the driving connection element 51 can be selectively meshed with the speed reduction driven unit 3.

Alternatively, the driving connection element 51 and the first gear 52 may be integrated, and the driving connection element 51 and the first gear 52 may also be two elements detachably connected and independent from each other.

The embodiment of the utility model provides an in, through set up with drive arrangement mutually independent head of blowing, make the head of blowing can be independent of drive arrangement accomodates, has reduced and has accomodate the space that occupies to, the head of blowing can be dismantled, is convenient for change the head of blowing into new head of blowing or is convenient for change the head of blowing into other instrument heads such as drill bit, scarification head, stirring head.

In some embodiments, the step-up drive unit comprises at least two transmission elements having different diameters, wherein the transmission ratio of the transmission element for input power to the transmission element for output power therein is less than 1, which can be characterized as the ratio of the instantaneous input angular velocity to the output angular velocity in the step-up drive unit.

Specifically, as shown in fig. 3, the speed increasing transmission unit 5 may include a first gear 52 and a second gear 53, an outer diameter of the first gear 52 is larger than an outer diameter of the second gear 53, the first gear 52 is fixedly connected to the driving connection member 51, the second gear 53 is engaged with the first gear 52, and the fan 6 is coaxially connected to the second gear 53.

Preferably, the ratio of the outer diameters of the first gear 52 and the second gear 53 is 76: 9.

In practical applications, since the outer diameter of the first gear 52 is larger than the outer diameter of the second gear 53, the speed-increasing transmission unit 5 can accelerate the rotating speed output by the speed-reducing driven unit 3 to meet the rotating speed requirement of the blowing head.

In some embodiments, as shown in fig. 1-2, the blowing head further includes at least one wind duct 7, the scroll 4 includes at least one wind outlet channel 43, a region of the wind duct 7 for contacting the wind outlet channel 43 is configured into a first shape, and a region of the wind outlet channel 43 for contacting the wind duct 7 is configured into a second shape capable of achieving a sealed connection with the first shape.

Specifically, the air duct 7 may be sleeved outside the air outlet channel 43, and correspondingly, the first shape structure is on an inner wall of the air duct 7, which is used for contacting with the air outlet channel, and the second shape structure is on an outer wall of the air outlet channel 43, which is used for contacting with the air duct.

In some embodiments, as shown in fig. 5, the wind duct 7 includes a first opening 71 for connecting with the wind outlet channel 43, the first shape is a sealing rib formed along a circumferential direction of the first opening 71, existing in a closed loop and having a limiting portion 712, the second shape is a protrusion 44 protruding from a surface of the wind outlet channel 43 and disposed corresponding to the limiting portion, when the wind duct is connected with the wind outlet channel in a sealing manner, the protrusion is clamped in the limiting portion, and a surface of the wind outlet channel 43 located at a periphery of the protrusion abuts against the sealing rib.

Specifically, the air duct 7 further includes a second nozzle 72, the first nozzle 71 and the second nozzle 72 of the air duct 7 are disposed opposite to each other, and the second nozzle 72 is used for discharging the accelerated airflow flowing out through the air outlet channel 43.

The sealing rib 711 at least includes two bent portions 712 arranged at intervals along the closed loop formed by the first cylindrical opening 71, and correspondingly, the outer wall of the air outlet channel 43 is also provided with two protrusions 44 arranged at intervals, and the positions of the two protrusions 44 on the air outlet channel 43 correspond to the positions of the two bent portions 712 on the air duct 7 one by one.

In practical application, the air outlet channel 43 of the scroll 4 can be clamped in the bent portion 712 of the air duct 7 through the protrusion 44, so as to achieve detachable connection between the scroll 4 and the air duct 7, and because the outer wall of the air outlet channel 43 abuts against the sealing rib 711 forming a closed loop, the connection between the scroll 4 and the air duct 7 has better sealing performance, and air flow discharged from the interior of the scroll 4 is not easy to flow out from the connection between the scroll 4 and the air duct 7.

In some embodiments, as shown in fig. 1 to 3, the air outlet channel 43 is disposed along a circumferential direction of the scroll casing, and is configured to discharge the accelerated airflow generated in the scroll casing outwards from the circumferential direction of the scroll casing, and the air duct 7 and the air outlet channel 43 have the same first axis, and when the blowing head is mounted on the driving device including the handle, an included angle between the first axis and a second axis of the handle is smaller than or equal to a preset included angle.

In practical application, predetermine the contained angle and can set up based on actual demand, can understand that it is the less to predetermine the contained angle, blow the wind head install to drive arrangement after shared with the space of first axis vertically direction just is less, works as predetermine the contained angle and be zero, blow the wind head install to drive arrangement after occupy with the space of first axis vertically direction is minimum.

In some embodiments, as shown in fig. 1, the scroll 4 includes a first scroll 45 and a second scroll 46 which are oppositely disposed, the first scroll 45 and the second scroll 46 are detachably connected, and as shown in fig. 2, the air inlet 41 penetrates through a surface of the second scroll 46 opposite to the first scroll 45.

In some embodiments, the first scroll 45 and the second scroll 46 are detachably connected by a clamping groove and a clamping jaw that can be clamped with each other, as shown in fig. 4, the first scroll 45 is provided with at least two clamping jaws 451 at intervals along a circumferential direction thereof, correspondingly, as shown in fig. 6, the second scroll 46 is provided with at least two clamping grooves 461 at intervals along a circumferential direction thereof, and positions of the clamping grooves 461 on the second scroll 46 correspond to positions of the clamping jaws 451 on the first scroll 45 in a one-to-one manner.

Optionally, the positions of the clamping groove and the clamping jaw may be reversed, that is, the clamping groove may be arranged on the first scroll 45, and correspondingly, the clamping jaw may be arranged on the second scroll 46.

In practical application, through mutually supporting of draw-in groove and jack catch, the user need not professional assembly and disassembly tools alright realize the quick assembly disassembly of volute.

In some embodiments, the edge connection portion of at least one of the first scroll 45 and the second scroll 46 includes a guide seal 453 disposed circumferentially, the length of the guide seal 453 in the axial direction of the scroll 4 is equal to or greater than a predetermined length, the scroll 4 can be guided by the guide seal 453 when the first scroll 45 is connected to the second scroll 46, and the scroll 4 can be sealed by the guide seal 453 when the first scroll 45 is connected to the second scroll 46.

Specifically, as shown in fig. 4, the guide seal 453 is disposed at the edge connecting portion of the first scroll 45, and since the length of the guide seal 453 in the axial direction of the scroll 4 is equal to or greater than a predetermined length, the guide seal 453 can extend into the second scroll 46 after the first scroll 45 is connected to the second scroll 46, and the outer surface of the guide seal 453 abuts against the inner surface of the second scroll 46, thereby sealing between the first scroll 45 and the second scroll 46.

The preset length can be set based on actual requirements, the preset length can be set to be 2.5-4 mm, namely 1.5-3 times of the wall thickness of the corresponding conventional wall, and it can be understood that the larger the preset length is, the better the sealing performance of the first scroll shell 45 and the second scroll shell 46 after connection is.

Since the length of the guide seal 453 is large, in order to prevent the guide seal 453 from being deformed during injection molding, the surface of the guide seal 453 includes a plurality of equally spaced grooves 454, and the grooves 454 are disposed in the axial direction of the scroll 4.

In practical application, the guide sealing piece is arranged on the first volute or the second volute, air leakage caused by lack of screw fixation during clamping assembly can be compensated, and accurate alignment of the first volute and the second volute can be realized during volute assembly through the guide sealing piece.

In some embodiments, the speed-increasing transmission unit 5 includes an output end connected to the fan, and an input end for coupling with the speed-decreasing driven unit, the output end is disposed near a central region of the scroll, and the input end is disposed near the air outlet channel.

Specifically, as shown in fig. 3, the first scroll 45 includes a connecting seat 452 having a receiving cavity 4521, the connecting seat 452 is located on an outer surface of the first scroll 45 and is disposed near the air outlet channel 43, a central axis of the connecting seat 452 is not overlapped with a central axis of the first scroll 45, and the connecting seat 452 is offset from a middle position of the first scroll 45 and is disposed near the air outlet channel 43.

The speed-increasing transmission unit 5 is accommodated in the accommodating cavity 4521 of the connecting seat 452, the driving connecting element 51 of the speed-increasing transmission unit 5 is disposed at one side of the accommodating cavity 4521 close to the air outlet channel 43, and the output end 54 of the speed-increasing transmission unit 5 for connecting with the fan 6 is disposed at one side of the accommodating cavity 4521 far away from the air outlet channel 43.

The fan 6 is located in an installation space formed by the first scroll 45 and the second scroll 46, the first scroll 45 is provided with a through hole 455 at a bottom of the side of the accommodating cavity 4521 away from the air outlet channel 43, and the output end 54 of the speed-increasing transmission unit 5 passes through the through hole 455 and is connected with the fan 6.

In practical applications, the position of the connecting seat 452 relative to the first volute 45 and the position of the speed-increasing transmission unit 5 in the accommodating cavity 4521 are reasonably set, so that the driving device can be connected with the blowing head at a position close to the air outlet channel 43, and thus, the volume of the driving device and the blowing head after assembly can be reduced, and the occupied space can be reduced.

In some embodiments, as shown in fig. 1 and 3, the scroll further includes a cover plate 8, the cover plate 8 is provided with a first mounting hole 81, the driving connection member 51 passes through the first mounting hole 81 to engage with the reduction driven unit 3, and the second clamping unit 42 is provided on an outer side surface of the cover plate 8 and/or a sidewall 4522 of the connection seat 452.

Specifically, the size of the cover plate 8 matches the size of the opening of the receiving cavity 4521, the cover plate 8 covers the opening of the receiving cavity 4521, so that the speed-increasing transmission unit 5 disposed in the receiving cavity 4521 can be protected, and the position of the first mounting hole 81 on the cover plate 8 corresponds to the position of the driving connection member 51 in the connection seat 452, so that the driving connection member 51 can pass through the first mounting hole 81 to engage with the speed-reducing driven unit 3.

Optionally, the cover plate 8 may be fixed to the connecting seat 452 by a detachable connection manner such as clamping or screwing.

In some embodiments, the connection unit further comprises a first locking assembly, by means of which the blowing head can be brought into a form-locking and/or force-locking connection when the blowing head is mounted on the drive comprising a first mounting assembly.

In some embodiments, as shown in fig. 1, the first locking assembly is configured as a second clamping unit 42, and when the blowing head including the second clamping unit 42 is mounted on the tool head mounting part of the driving device, the blowing head can realize clamping fit by means of the second clamping unit 42 and the first mounting assembly of the driving device.

Specifically, as shown in fig. 1, the second clamping unit 42 includes a first limiting table 421, a first clamping member 422, and a second clamping member 423, where the first limiting table 421 is configured to be matched with the first limiting hole 111 of the first mounting assembly, the first clamping member 422 is configured to be matched with the first stopping member 112 of the first mounting assembly, and the second clamping member 423 is configured to be matched with the second stopping member 113 of the first mounting assembly.

Specifically, the first limiting table 421 may be disposed on the cover plate 8, the first clamping member 422 and the second clamping member 423 may be disposed at intervals along a circumferential direction of a side wall of the connecting seat 452, the first clamping member 422 and the second clamping member 423 are disposed opposite to each other, correspondingly, the first limiting hole 111 is disposed on a surface of the tool bit mounting portion of the housing 1 opposite to the cover plate 8, a position of the first limiting hole 111 at the mounting end portion corresponds to a position of the first limiting table 421 at the cover plate 8 one by one, and the first stopping member 112 and the second stopping member 113 are disposed at intervals along the circumferential direction of the mounting end portion and correspond to positions of the first clamping member 422 and the second clamping member 423 at the connecting seat 452 one by one.

In practical applications, when the blowing head is assembled with the driving device, the first limit table 421 is inserted into the first limit hole 111, the blowing head rotates with the first limit table 421 as a fulcrum, when the driving connecting element 51 is engaged with the driven element, automatic alignment of the driving connecting element 51 and the driven element can be achieved, even if the driving connecting element 51 and the driven element are slightly deflected during installation, the driving connecting element 51 and the driven element can be automatically aligned to correct installation positions, and installation efficiency of the blowing head and the driving device is improved. After the driving connecting element 51 is engaged with the driven element, the first stopping element 112 is clamped on the first clamping element 422, and the second stopping element 113 is clamped on the second clamping element 423, so that the blowing head and the driving device are locked.

Example 2

It should be noted that the main differences between this embodiment and embodiment 1 are: the speed-increasing transmission unit in embodiment 1 includes a first gear and a second gear having different diameters, and the speed-increasing transmission unit in this embodiment includes a driving wheel, a driven wheel and a transmission belt, and other structures are the same, so that detailed description thereof is omitted in this embodiment.

Specifically, the outer diameter of the driving wheel is larger than that of the driven wheel, the transmission belt is arranged on the peripheries of the driving wheel and the driven wheel, the driving wheel is connected with the driving connecting element 51, and the fan 6 is coaxially connected with the driven wheel.

Preferably, the ratio of the outer diameters of the driving wheel and the driven wheel is 76: 9.

Alternatively, the driving connecting element 51 and the driving wheel may be integrated, and the driving connecting element 51 and the driving wheel may also be two detachably connected elements independent of each other.

In practical application, because the outer diameter of the driving wheel is larger than that of the driven wheel, the speed-increasing transmission unit 5 can accelerate the rotating speed output by the speed-reducing driven unit 3 so as to meet the rotating speed requirement of the blowing head.

Example 3

It should be noted that the main differences between this embodiment and embodiment 1 are: the air duct in embodiment 1 is sleeved outside the air outlet channel, the first shape is configured on an inner wall of the air duct, which is used for contacting with the air outlet channel, and the second shape is configured on an outer wall of the air outlet channel, which is used for contacting with the air duct.

Specifically, the air outlet channel is sleeved outside the air duct, correspondingly, the first shape is formed on the outer wall of the air duct, which is used for contacting with the air outlet channel, the second shape is formed on the inner wall of the air outlet channel, which is used for contacting with the air duct, when the air duct is hermetically connected with the air outlet channel, the first shape is matched with the second shape, and the first shape of the outer wall of the air duct is abutted against the inner wall of the air outlet channel.

Example 4

The utility model also provides a portable detachable blowing device, including drive arrangement and as before any one the blowing head, drive arrangement includes speed reduction driven unit, the blowing head includes the volute, set up in the fan unit of volute to and at least one linkage unit, the fan unit includes fan and acceleration rate drive unit, the linkage unit includes the drive connecting element;

when the blowing head is detachably mounted on the driving device, the speed-increasing transmission unit is in power coupling with the speed-reducing driven unit through the driving connecting element, so that the driving device can apply a first rotating speed reduced by the speed-reducing driven unit to the speed-increasing transmission unit and drive the fan to rotate at a second rotating speed which is greater than the first rotating speed.

Specifically, as shown in fig. 7 to 9, the driving apparatus further includes a housing 1 and a driving unit 2, the driving unit 2 and the deceleration driven unit 3 are both located in the housing 1, the housing 1 includes a tool bit mounting portion, the tool head mounting part is provided with a first clamping unit 11 clamped with the second clamping unit 42, the tool bit mounting part is also provided with a second mounting hole 12, the reduction driven unit 3 includes a driven member 34, the driven element extends out of the housing 1 through the second mounting hole 12, the blowing head is clamped with the first clamping unit 11 of the housing 1 through the second clamping unit 42 to connect the blowing head to the housing 1, when the blowing head is snapped onto the housing 1, the drive connection element 51 engages with the driven element 34 of the reduction driven unit 3 through the first mounting hole 81.

The structure and the specific connection mode of the second clamping unit 42 and the first clamping unit 11 can be referred to the description in the embodiment of the blowing head, and are not described herein again.

In practical application, because portable removable blast apparatus's the head of blowing can be dismantled, when facing other horticulture and maintaining the demand, can replace portable removable blast apparatus's the head of blowing with the instrument head of other needs to satisfy the diversified demand that the horticulture was maintained.

In some embodiments, in view of the fact that the driving device may need to be connected with other required tool bits, in order to improve the adaptability of the driving device, the tool bit mounting part of the housing of the driving device may comprise at least a first mounting component and a second mounting component, and when the tool bit comprising a first locking component is mounted on the tool bit mounting part, the tool bit can realize a shape locking and/or force locking connection by means of the first locking component and the first mounting component, so that the driving device can drive the tool bit to work with a first maximum torsion strength;

when a tool head comprising a second locking assembly is mounted on the tool head mounting part, the tool head can be connected in a form-locking and/or force-locking manner by means of the second locking assembly and the second mounting assembly, so that the driving device can drive the tool head to work with a second maximum torsional strength which is greater than the first maximum torsional strength.

The first maximum anti-torque strength refers to a maximum installation strength at which the driving device and the tool head are not loosened during normal operation of the handheld electric tool, and may specifically be 0-5N £ m, and the second maximum anti-torque strength refers to a maximum installation strength at which the driving device and the tool head are not loosened during normal operation of the handheld electric tool, and may specifically be 0-30N @.

In some embodiments, as shown in fig. 7, the first mounting assembly is configured as a first clamping unit 11, as shown in fig. 1, the first locking assembly is configured as a second clamping unit 42, and when a tool head (e.g., a blowing head) including the first locking assembly is mounted on the tool head mounting portion, the tool head can be clamped and matched by the second clamping unit 42 and the first clamping unit 11, so that the driving device can drive the tool head to work at the first maximum torque resistance strength.

In some embodiments, as shown in fig. 7, the second mounting assembly is configured as a first locking unit 13, as shown in fig. 10, the second locking assembly is configured as a second locking unit 90, and when a tool bit (e.g., a power drill bit as shown in fig. 10) including the second locking assembly is mounted on the tool bit mounting portion, the tool bit can realize a latch connection with the second locking unit 90 and the first locking unit 13, so that the driving device can drive the tool bit to work at the second maximum torque resistance strength.

Specifically, as shown in fig. 1 and 7, the first clamping unit 11 includes a first limiting hole 111, a first stopping member 112, and a second stopping member 113, and the first locking unit includes a second limiting table 131 and a fixing table 132;

when a tool head (for example, a blowing head) including the second clamping unit 42 is mounted on the tool head mounting portion and the second clamping unit 42 includes a first limiting table 421, a first clamping member 422, and a second clamping member 423, the first limiting table 421 is matched with the first limiting hole 111 of the first clamping unit 11, the first clamping member 422 is matched with the first stopping member 112 of the first clamping unit 11, and the second clamping member 423 is matched with the second stopping member 113 of the first clamping unit 11.

As shown in fig. 7 and 10, when the electric drill including the second lock unit 90 is mounted on the tool bit mounting portion and the second lock unit 90 includes a second stopper hole 901 and a bridge 902, the second stopper hole 901 is engaged with the second stopper table 131 and the bridge 902 is engaged with the fixing table 132.

In practical application, the first mounting assembly or the second mounting assembly can be selected to be connected with tool heads in different forms according to requirements, and the connection adaptability of the driving device can be improved.

In some embodiments, as shown in fig. 8 to 9, the driving unit 2 includes a motor, the reduction driven unit 3 further includes a third gear 31, a linkage gear 32 and a fourth gear 33, the linkage gear 32 includes an input gear 321 and an output gear 322 coaxially disposed, an outer diameter of the input gear 321 is larger than an outer diameter of the output gear 322, and an outer diameter ratio of the third gear 31 to the input gear 321 is larger than an outer diameter ratio of the output gear 322 to the fourth gear 33;

the motor is coaxially connected with the third gear 31, the third gear 31 is meshed with the input gear 321, the output gear 322 is meshed with the fourth gear 33, and the fourth gear 33 is fixedly connected with the driven element.

In practical applications, if the linkage gear 32 is not provided, but the fourth gear 33 and the third gear 31 are directly meshed, in order to enable the reduction driven unit 3 to output a small rotation speed, the diameter of the fourth gear 33 needs to be set large, which results in a large size of the reduction driven unit 3 in the horizontal direction, and by providing the linkage gear 32, the linkage gear 32 can perform multi-stage speed reduction on the rotation speed output by the motor, so that the reduction driven unit 3 does not excessively occupy the space of the driving device in the horizontal direction while outputting a small rotation speed.

The installation and operation process of the blowing head of the portable detachable blowing device provided by the embodiment is as follows:

firstly, aligning a driving connecting element 51 on the blowing head with a driven element 34 of the deceleration driven unit 3 to realize the engagement of the driving connecting element 51 and the driven element 34;

secondly, clamping the second clamping unit 42 on the blowing head with the first mounting assembly 11 on the driving device to lock the blowing head and the driving device;

thirdly, operating the driving device to enable the driving unit 2 to output power, wherein the power output by the driving unit 2 sequentially passes through the speed reduction driven unit 3, the driven element 34 of the speed reduction driven unit 3, the driving connecting element 51 of the blowing head, the speed increase transmission unit 5 and the fan, and enables the fan to rotate relative to the volute of the blowing head;

then, the air is blown by the rotating fan;

finally, operating the driving device to stop the power output of the driving unit 2, disassembling the second clamping unit 42 and the first mounting assembly 11, and respectively accommodating the driving device and the blowing head.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. Blowing head for a blowing device, comprising a volute (4), a fan unit arranged in the volute, and at least one connection unit, the fan unit comprising a fan (6) and a step-up transmission unit (5), the connection unit comprising a drive connection element (51);

when the blowing head is detachably mounted on a driving device comprising a speed reduction driven unit (3), the speed increase transmission unit (5) is in power coupling with the speed reduction driven unit (3) through the driving connecting element (51), so that the driving device can apply a first rotating speed reduced by the speed reduction driven unit (3) to the speed increase transmission unit (5) and drive the fan (6) to rotate at a second rotating speed which is greater than the first rotating speed;

wherein the fan (6) comprises a plurality of fan blades for driving the air to flow.

2. Blowing head according to claim 1, characterised in that the step-up transmission unit (5) comprises at least two transmission elements with different diameters, wherein the transmission ratio of the transmission element for the input power to the transmission element for the output power therein is smaller than 1.

3. Blowing head according to claim 1, characterized in that it further comprises at least one air duct (7), said volute (4) comprising at least one air outlet channel (43), the area of said air duct (7) intended to be in contact with said air outlet channel (43) being configured in a first shape, the area of said air outlet channel (43) intended to be in contact with said air duct (7) being configured in a second shape able to achieve a sealed connection with said first shape.

4. The blowing head according to claim 3, wherein the wind duct (7) comprises a first opening (71) for connecting with the air outlet channel (43), the first shape is a sealing rib (711) formed along the circumference of the first opening (71) and having a limiting portion (712) and being in a closed loop, the second shape is a protrusion (44) protruding from the surface of the air outlet channel (43) and corresponding to the limiting portion (712), when the wind duct (7) is connected with the air outlet channel (43) in a sealing manner, the protrusion (44) is clamped in the limiting portion (712), and the surface of the air outlet channel (43) located at the periphery of the protrusion (44) abuts against the sealing rib (711).

5. The blowing head according to claim 3, characterized in that the air outlet channel (43) is arranged along the circumferential direction of the scroll casing, the air duct (7) and the air outlet channel (43) have the same first axis, and when the blowing head is mounted on a driving device comprising a handle, the first axis forms an angle smaller than or equal to a preset angle with respect to the second axis of the handle.

6. Blowing head according to claim 3, characterised in that the step-up gear unit (5) further comprises an output (54) connected to the fan (6), the output (54) being arranged close to a central region of the volute (4), the drive connection element (51) of the step-up gear unit (5) being arranged close to the air outlet channel (43).

7. A blowing head according to claim 1, characterised in that the volute (4) comprises a first volute (45) and a second volute (46) which are oppositely arranged and detachably connected, the edge connection portion of at least one of the first volute (45) and the second volute (46) comprises a guide sealing member (453) which is circumferentially arranged, the length of the guide sealing member (453) along the axial direction of the volute (4) is greater than or equal to a preset length, when the first volute (45) is connected with the second volute (46), the volute (4) can realize guiding by means of the guide sealing member, and when the first volute (45) is connected with the second volute (46), the volute (4) can realize sealing by means of the guide sealing member.

8. A blowing head according to claim 1, characterised in that the connection unit further comprises a first locking assembly by means of which the blowing head can be brought into a form-locking and/or force-locking connection when the blowing head is mounted on the drive comprising a first mounting assembly.

9. Blowing head according to claim 8, characterized in that the first locking assembly is configured as a second snap-in unit (42), by means of which second snap-in unit (42) the blowing head can be brought into snap-fit with the first mounting assembly configured as a first snap-in unit (11) when the blowing head comprising the second snap-in unit (42) is mounted on the drive comprising the first mounting assembly.

10. A portable detachable hair dryer apparatus, characterized in that it comprises a driving means and a blowing head according to any one of claims 1-9, said driving means comprising a deceleration driven unit (3), said blowing head comprising a volute (4), a fan unit arranged inside said volute, and at least one connection unit, said fan unit comprising a fan (6) and a step-up transmission unit (5), said connection unit comprising a driving connection element (51);

when the blowing head is detachably mounted on the driving device, the speed-increasing transmission unit (5) is in power coupling with the speed-reducing driven unit (3) through the driving connecting element (51), so that the driving device can apply a first rotating speed obtained by reducing the speed of the speed-reducing driven unit (3) to the speed-increasing transmission unit (5) and drive the fan (6) to rotate at a second rotating speed which is greater than the first rotating speed.

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