CN112780596B - Pitching structure and blowing device - Google Patents

Abstract

The invention discloses a pitching structure and a blowing device, wherein the pitching structure comprises a machine head, a support and a pitching driving piece, the support comprises a first split body and a second split body which are arranged at intervals, the machine head is arranged between the first split body and the second split body, the machine head is respectively and rotatably connected with the first split body and the second split body, the pitching driving piece is used for driving the machine head to rotate relative to the support, and the gravity center of the machine head is positioned on a rotating shaft line of the machine head relative to the support. Above-mentioned every single move structure, because the focus of aircraft nose is located the pivot of aircraft nose relative support pivoted, the moment of torsion of the relative pivot of focus of drive aircraft nose every single move need not to overcome at this moment, and consequently the moment of torsion that needs is less, and the moment of torsion between aircraft nose and the support mainly is produced by the frictional force of aircraft nose and support junction, and the power of every single move driving piece output can be more smooth drives aircraft nose every single move and shakes the head, and is easier to the regulation of aircraft nose every single move, makes the every single move of aircraft nose more smooth and easy, can improve user's use experience.

Description

Pitching structure and blowing device

Technical Field

The invention relates to the technical field of blowing devices, in particular to a pitching structure and a blowing device.

Background

The fan is used as an electric appliance for cooling and increasing indoor air circulation in the household appliance, has the advantages of low price, convenience in use and the like, and has larger demand. Along with the requirements of people on indoor environment are more and more strict, the fan is also continuously improved, compared with a mode of adopting a single rod at the center of the machine head to support the machine head in a double ear manner, the machine head can be provided with a larger rotating angle and a larger wind inlet and outlet area, but in the traditional double ear support machine head structure, the structural design for controlling pitching and shaking is defective, so that the stress of the double ear support machine head structure in the pitching and shaking process is unreasonable, and the problems of unsmooth shaking and the like are caused.

Disclosure of Invention

Based on the defect that the existing blowing device is unsmooth in shaking head is overcome, the pitching structure with smooth shaking head and the blowing device are provided.

The technical scheme is as follows:

the utility model provides a every single move structure, includes aircraft nose, support and every single move driving piece, the support includes first components of a whole that can function independently and second components of a whole that can function independently and that the interval sets up, the aircraft nose is located first components of a whole that can function independently with between the second components of a whole that can function independently the first components of a whole that can function independently the second components of a whole that can function independently rotatable coupling, every single move driving piece is used for driving the aircraft nose is relative the support rotates, the focus of aircraft nose is located the aircraft nose is relative on the pivoted axis of rotation of support.

Above-mentioned every single move structure, the aircraft nose is rotatable with first components of a whole that can function independently and second components of a whole that can function independently are connected, then the aircraft nose is born by first components of a whole that can function independently and second components of a whole that can function independently cooperation, every single move driving piece can drive the aircraft nose and rotate relative support of aircraft nose, adjust the every single move angle of aircraft nose, because the focus of aircraft nose is located the pivot of aircraft nose relative support pivoted, drive aircraft nose every single move and need not to overcome the moment of torsion of the relative pivot of focus of aircraft nose this moment, consequently the moment of torsion that needs is less, and the moment of torsion between aircraft nose and the support mainly is produced by the frictional force of aircraft nose and support junction, the power of every single move driving piece output can more smooth drive aircraft nose every single move and shake, it is easier to adjust the aircraft nose every single move and shake the head, make the every single move of aircraft nose more smooth and easy, can improve user experience.

In one embodiment, the pitch driving member is a motor, one of a stator and a rotor of the pitch driving member is connected with the machine head, the other is connected with the first split or the second split, and a rotation axis of the rotor coincides with a rotation axis of the machine head relative to the bracket.

In one embodiment, the pitching structure further comprises a first matching piece and a second matching piece, the first matching piece is connected with the machine head, the second matching piece is connected with the first split, the first matching piece is sleeved outside the second matching piece, and the pitching driving piece is used for driving the first matching piece and the second matching piece to rotate relatively.

In one embodiment, the pitch structure further includes a bearing, the bearing is sleeved outside the second mating member, and the bearing is disposed between the first mating member and the second mating member.

In one embodiment, the first matching piece is provided with an assembly hole, the second matching piece is inserted into the assembly hole, a limiting protrusion is arranged in the assembly hole, and the limiting protrusion is used for being abutted to the end face, away from the first split, of the bearing.

In one embodiment, the second matching piece is provided with a first limiting part and a second limiting part, and the bearing is arranged between the first limiting part and the second limiting part.

In one embodiment, the second limiting part is a clamp spring, the first limiting part is arranged at one end of the second matching piece, a clamping groove is formed in the second matching piece, and the second limiting part is arranged at the clamp spring.

In one embodiment, the pitch driving member is disposed between the first mating member and the handpiece, an output shaft of the pitch driving member is connected to the first mating member, and a rotation axis of the output shaft coincides with a rotation axis of the handpiece relative to the rotation of the bracket.

In one embodiment, the second matching piece is provided with a transmission hole matched with the output shaft, and part of the hole wall in the transmission hole is a plane.

In one embodiment, the pitch structure further comprises a first threaded member, a first limiting hole is formed in the pitch driving member, a second limiting hole is formed in the first matching member, a third limiting hole is formed in the machine head, and the threaded member sequentially penetrates through the second limiting hole, the first limiting hole and the third limiting hole in threaded fit.

In one embodiment, the machine head is provided with a groove, a first convex column and a second convex column are arranged in the groove at intervals, the first convex column and the second convex column are respectively provided with a third limiting hole on the end face of the first convex column, two sides of the pitching driving piece are provided with two extension parts, the extension parts are provided with the first limiting holes, and the main body of the pitching driving piece is arranged between the first convex column and the second convex column.

In one embodiment, the first protruding column is provided with a first blocking part, the first blocking part encloses into a first arc-shaped groove used for placing the extension part, an opening of the first arc-shaped groove faces to the direction of the second protruding column, the second protruding column is provided with a second blocking part, the second blocking part encloses into a second arc-shaped groove used for placing the extension part, and an opening of the second arc-shaped groove faces to the direction of the first protruding column.

In one embodiment, the pitch structure further includes a second threaded member, a fourth limiting hole is formed in the first matching member, a fifth limiting hole is formed in the machine head, the second threaded member penetrates through the fourth limiting hole and is in threaded fit with the fifth limiting hole, and the second limiting hole and the fourth limiting hole are arranged along the circumferential direction of the first matching member at intervals.

In one embodiment, the first split body is provided with a bearing groove, and one end of the second matching piece far away from the machine head extends into the bearing groove and is connected with the first split body.

In one embodiment, the first mating member is disposed outside the carrying groove, and the second mating member includes an extending portion extending into the carrying groove, and the extending portion is disposed outside the first mating member.

In one embodiment, the pitching structure further comprises a first matching piece and a second matching piece, the first matching piece is connected with the machine head, the second matching piece is connected with the first split, the second matching piece is sleeved outside the first matching piece, and the pitching driving piece is used for driving the first matching piece and the second matching piece to rotate relatively.

A blowing device comprising a pitch structure according to any preceding claim.

Above-mentioned blast apparatus, the aircraft nose is rotatable with first components of a whole that can function independently and second components of a whole that can function independently are connected, then the aircraft nose is born by first components of a whole that can function independently and second components of a whole that can function independently cooperation, every single move driving piece can drive the aircraft nose and rotate relative support of aircraft nose, adjust the every single move angle of aircraft nose, because the focus of aircraft nose is located the relative support pivoted axis of rotation of aircraft nose, drive aircraft nose every single move the aircraft nose every single move and need not to overcome the moment of torsion of the relative axis of rotation of focus of aircraft nose this moment, consequently, the moment of torsion that needs is less, and the moment of torsion between aircraft nose and the support mainly is produced by the frictional force of aircraft nose and support junction, the power of every single move driving piece output can be more smooth drive aircraft nose every single move the aircraft nose, it is easier to the regulation of aircraft nose every single move the head, make the every single move of aircraft nose more smooth and easy, can improve user experience.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application.

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an exploded schematic view of a pitch structure according to an embodiment of the present invention;

FIG. 2 is a schematic view of a first mating member, a second mating member and a bearing according to an embodiment of the present invention after assembly;

FIG. 3 is an oblique view of a first mating element according to an embodiment of the present invention;

FIG. 4 is an oblique view of a second mating element according to an embodiment of the present invention;

FIG. 5 is an oblique view of a pitch drive according to an embodiment of the invention;

FIG. 6 is a schematic view of a part of a handpiece according to an embodiment of the present invention;

FIG. 7 is an enlarged schematic view of FIG. 6 at A;

FIG. 8 is a front view of a second mating element according to an embodiment of the present invention;

Fig. 9 is a schematic view of a part of the structure in the direction a in fig. 1.

Reference numerals illustrate:

100. The device comprises a machine head, 101, a third limiting hole, 102, a groove, 103, a fifth limiting hole, 110, a first convex column, 111, a first blocking part, 120, a second convex column, 121, a second blocking part, 200, a bracket, 210, a first split body, 211, a bearing groove, 212, a perforation, 220, a second split body, 300, a pitching driving part, 301, a stator, 302, a rotor, 303, a first limiting hole, 310, an extension part, 400, a first matching part, 401, an assembly hole, 402, a second limiting hole, 403, a fourth limiting hole, 410, a limiting protrusion, 420, a structural flanging, 500, a second matching part, 501, a clamping groove, 502, a transmission hole, 503, a fixing hole, 510, a first limiting part, 520, a second limiting part, 530, an extending part, 600 and a bearing.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

As shown in fig. 1, an embodiment discloses a pitching structure, which includes a handpiece 100, a bracket 200 and a pitching driving member 300, wherein the bracket 200 includes a first split 210 and a second split 220 which are arranged at intervals, the handpiece 100 is disposed between the first split 210 and the second split 220, the handpiece 100 is rotatably connected with the first split 210 and the second split 220 respectively, the pitching driving member 300 is used for driving the handpiece 100 to rotate relative to the bracket 200, and the center of gravity of the handpiece 100 is located on a rotation axis of the handpiece 100 rotating relative to the bracket 200.

According to the pitching structure, the machine head 100 is rotatably connected with the first split 210 and the second split 220 respectively, so that the machine head 100 is supported by the first split 210 and the second split 220 in a matched manner, the pitching driving piece 300 can drive the machine head 100 to rotate relative to the bracket 200, the pitching angle of the machine head 100 is adjusted, the gravity center of the machine head 100 is located on the rotating axis of the machine head 100 relative to the bracket 200, at the moment, the pitching head of the machine head 100 is driven to pitch without overcoming the torque of the gravity center of the machine head 100 relative to the rotating axis, the required torque is small, the torque between the machine head 100 and the bracket 200 is mainly generated by the friction force at the joint of the machine head 100 and the bracket 200, the power output by the pitching driving piece 300 can drive the machine head 100 to pitch smoothly, the pitching head of the machine head 100 is easier to adjust, the pitching head of the machine head 100 is smoother, and the use experience of a user can be improved.

The machine head 100 comprises an air duct, a fan blade and a fan blade motor, wherein the fan blade and the fan blade motor are arranged in the air duct, the fan blade motor drives the fan blade to rotate, the air duct forms an air duct for air inlet and outlet, and specifically, the first split body 210 and the second split body 220 are respectively and rotatably connected with two sides of the air duct.

In one embodiment, as shown in fig. 1, pitch drive 300 is a motor, one of stator 301 and rotor 302 of pitch drive 300 is coupled to handpiece 100, the other is coupled to first split 210 or second split 220, and the axis of rotation of rotor 302 coincides with the axis of rotation of handpiece 100 relative to mount 200. Because the rotation axis of rotor 302 coincides with the rotation axis of handpiece 100 relative to bracket 200, the torque required to drive handpiece 100 to roll is small, the load of pitch drive element 300 can be reduced, a motor with a small maximum torque can be used, the cost can be reduced, the heating of pitch drive element 300 can be reduced, and the service life of pitch drive element 300 can be prolonged.

In one embodiment, as shown in fig. 1 and 2, the pitch structure further includes a first mating member 400 and a second mating member 500, the first mating member 400 is connected to the handpiece 100, the second mating member 500 is connected to the first split 210, the first mating member 400 is sleeved outside the second mating member 500, and the pitch driving member 300 is used for driving the first mating member 400 and the second mating member 500 to rotate relatively. At this time, the first matching piece 400 is matched with the second matching piece 500, and the first matching piece 400 can provide limit and support for the second matching piece 500, so that the matching between the machine head 100 and the first split 210 is more stable, and meanwhile, the gravity action of the machine head 100 directly received by the pitching driving piece 300 is lightened, so that the pitching driving piece 300 is convenient to drive the machine head 100 to pitch and shake.

In other embodiments, pitch drive 300 may also be directly connected to handpiece 100 and bracket 200, for example, stator 301 of pitch drive 300 is directly connected to handpiece 100, rotor 302 of pitch drive 300 is directly connected to bracket 200, and may also drive handpiece 100 to pitch relative to bracket 200; or stator 301 of pitch drive 300 is directly coupled to bracket 200 and rotor 302 of pitch drive 300 is directly coupled to handpiece 100.

In one embodiment, as shown in fig. 1 and 2, the pitch structure further includes a bearing 600, the bearing 600 is sleeved outside the second mating member 500, and the bearing 600 is disposed between the first mating member 400 and the second mating member 500. At this time, the bearing 600 can be utilized to realize the relative rotation between the first matching member 400 and the second matching member 500, compared with the direct contact between the first matching member 400 and the second matching member 500, the bearing 600 can reduce the torque required for overcoming the friction force, further drive the driving machine head 100 to shake, and simultaneously can reduce the direct friction, thereby improving the overall service life of the pitching structure.

In one embodiment, as shown in fig. 1 to 3, the first matching member 400 is provided with an assembly hole 401, the second matching member 500 is inserted into the assembly hole 401, and a limiting protrusion 410 is disposed in the assembly hole 401, and the limiting protrusion 410 is used for abutting against an end surface of the bearing 600 away from the first split body 210. The bearing 600 can be limited through the limiting protrusion 410, so that the bearing 600 is prevented from being separated from the assembly hole 401, and the continuous effect of the bearing 600 is ensured.

Specifically, the limiting protrusion 410 is disposed on a side of the assembly hole 401, which is close to the handpiece 100, so that the length of the assembly hole 401 can be shortened on the basis of limiting the bearing 600, and the overall size of the first fitting 400 can be reduced, so that the pitching structure is more compact.

In one embodiment, as shown in fig. 2, a first limiting portion 510 and a second limiting portion 520 are disposed outside the second fitting 500, and the bearing 600 is disposed between the first limiting portion 510 and the second limiting portion 520. The first limiting portion 510 and the second limiting portion 520 can jointly limit the bearing 600, so as to prevent the bearing 600 from moving relative to the second matching member 500.

In one embodiment, as shown in fig. 1 and 4, the second limiting portion 520 is a snap spring, the first limiting portion 510 is disposed at an end of the second mating member 500, the second mating member 500 is provided with a clamping groove 501, and the second limiting portion 520 is disposed at the snap spring. The snap spring can realize the limit function of the bearing 600, and the snap spring can be detached from the second matching piece 500, so that the bearing 600 can be conveniently installed and detached.

Optionally, the snap spring is an annular structure with a notch, and the snap spring is made of an elastic material, so that the snap spring can be separated from the clamping groove 501 by breaking off the snap spring, and the bearing 600 can be installed or removed at this time.

In other embodiments, the snap spring is disposed outside the mounting hole 401. At this time, the installation and the detachment of the snap spring are performed outside the second matching piece 500, so that the operation is more convenient, and the snap spring cannot interfere with the second limiting part 520 in position.

In one embodiment, as shown in fig. 1, pitch drive member 300 is disposed between first mating member 400 and handpiece 100, and the output shaft of pitch drive member 300 is connected to first mating member 400, and the rotational axis of the output shaft coincides with the rotational axis of handpiece 100 relative to bracket 200. At this time, the pitching driving member 300 directly drives the machine head 100 to roll, and the rotation axis of the output shaft of the pitching driving member 300 coincides with the rotation axis of the machine head 100 rotating relative to the bracket 200, so that the torque required to be output by the pitching driving member 300 to drive the machine head 100 to roll can be reduced, the load of the pitching driving member 300 is lightened, the heating of the pitching driving member 300 can be reduced, and the service life of the pitching driving member can be prolonged.

Specifically, the output shaft of pitch drive 300 is rotor 302 of pitch drive 300.

In one embodiment, as shown in fig. 4, a transmission hole 502 matched with the output shaft is formed on the second matching member 500, and a part of the hole wall in the transmission hole 502 is a plane. At this time, the output shaft and the transmission hole 502 do not slip during rotation, and the transmission effect is more stable.

Wherein, the transmission hole 502 has two opposite planes, the cross-sectional shape of the output shaft matches with the cross-sectional shape of the transmission hole 502, and the output shaft and the second matching piece 500 are less prone to slipping during transmission.

In one embodiment, as shown in fig. 5 to 8, the pitch structure further includes a first threaded member, the pitch driving member 300 is provided with a first limiting hole 303, the first matching member 400 is provided with a second limiting hole 402, the handpiece 100 is provided with a third limiting hole 101, and the threaded member sequentially penetrates through the second limiting hole 402, the first limiting hole 303 and is in threaded fit with the third limiting hole 101. The first matching piece 400, the pitching driving piece 300 and the machine head 100 can be fixed through the first threaded piece, so that the whole structure is more stable, and the first threaded piece is matched with the first matching piece 400, the pitching driving piece 300 and the machine head 100 at the same time, so that the whole structure can be simplified.

Specifically, the first screw member is a bolt or a screw.

In one embodiment, as shown in fig. 5 to 7, a groove 102 is formed on the handpiece 100, a first boss 110 and a second boss 120 are spaced in the groove 102, third limiting holes 101 are formed on end surfaces of the first boss 110 and the second boss 120, two extension portions 310 are formed on two sides of the pitch driving element 300, a first limiting hole 303 is formed on the extension portion 310, and a main body of the pitch driving element 300 is disposed between the first boss 110 and the second boss 120. By the cooperation of the first and second protrusions 110, 120 and the two extensions 310, the relative rotation of the handpiece 100 and the pitch drive 300 can be prevented, and the handpiece 100 can output a better torque to pitch the handpiece 100 relative to the bracket 200. And the main body of the pitching driving element 300 is located in the groove 102 and between the first convex column 110 and the second convex column 120, so that the pitching driving element 300 is more stable after being installed, and the pitching driving element 300 cannot protrude out of the whole appearance surface of the machine head 100 after being installed, so that the appearance integrity after being installed is better.

Specifically, the outer sides of the first and second protruding columns 110 and 120 are provided with reinforcing ribs connected to the walls of the groove 102, and the first and second protruding columns 110 and 120 are required to bear large forces as the main bearing members connected to the bracket 200, so that the reinforcing ribs are provided to protect the first and second protruding columns 110 and 120 from structural damage.

In one embodiment, as shown in fig. 5 to 7, a first blocking portion 111 is disposed on the first pillar 110, the first blocking portion 111 encloses a first arc-shaped slot for placing the extension portion 310, an opening of the first arc-shaped slot is disposed towards the direction of the second pillar 120, a second blocking portion 121 is disposed on the second pillar 120, the second blocking portion 121 encloses a second arc-shaped slot for placing the extension portion 310, and an opening of the second arc-shaped slot is disposed towards the direction of the first pillar 110. At this time, when the pitching driving member 300 is connected with the first convex column 110 and the second convex column 120, the extension portion 310 can be placed in the first arc-shaped groove and the second arc-shaped groove, so that the extension portion 310 and the first convex column 110 or the second convex column 120 can be aligned conveniently, the pitching driving member 300 can be limited by the first blocking portion 111 and the second blocking portion 121, displacement of the pitching driving member 300 is prevented, connection between the pitching driving member 300 and the machine head 100 is more stable, stable driving of pitching driving member 300 to pitching and shaking of the machine head 100 is facilitated, noise generated in a shaking process is reduced, and the like.

In one embodiment, as shown in fig. 6 to 8, the pitch structure further includes a second threaded member, a fourth limiting hole 403 is provided on the first matching member 400, a fifth limiting hole 103 is provided on the handpiece 100, the second threaded member penetrates through the fourth limiting hole 403 and is in threaded engagement with the fifth limiting hole 103, and the second limiting hole 402 and the fourth limiting hole 403 are disposed at intervals along the circumferential direction of the first matching member 400. Because the connection structure of aircraft nose 100 and first cooperation spare 400 needs to bear the weight of aircraft nose 100 self, therefore on setting up first screw spare and connect the basis, set up the second screw spare and be connected first cooperation spare 400 and aircraft nose 100 alone, further consolidate the connection between aircraft nose 100 and the first cooperation spare 400, improve holistic structural strength, second spacing hole 402, fourth spacing hole 403 set up along the circumference interval of first cooperation spare 400 simultaneously, make first cooperation spare 400 and aircraft nose 100 be connected more firmly, the condition such as relative displacement can not appear.

In particular, the second screw is a bolt or a screw.

Alternatively, as shown in fig. 3 and 8, one end of the first matching member 400, which is close to the handpiece 100, is provided with a structural flange 420, the second limiting hole 402 and the fourth limiting hole 403 are all disposed on the structural flange 420, and the second limiting hole 402 and the fourth limiting hole 403 are sequentially disposed at intervals along the circumferential direction of the first matching member 400.

In one embodiment, as shown in fig. 4 and 9, the first split 210 is provided with a carrying groove 211, and an end of the second mating member 500 away from the handpiece 100 extends into the carrying groove 211 and is connected to the first split 210. At this time, the gravity of the handpiece 100 received by the second fitting 500 may partially act on the inner wall of the bearing groove 211, so as to reduce the received force and torque at the connection between the second fitting 500 and the first split 210, prevent structural damage caused by excessive stress at the connection between the second fitting 500 and the first split 210, and improve the service life of the overall structure.

Specifically, as shown in fig. 4 and 9, a fixing hole 503 is formed on a side of the second fitting member 500 away from the handpiece 100, a through hole 212 is formed on a bottom wall of the carrying groove 211, and a screw or a bolt can be used to pass through the through hole 212 and be in threaded fit with the fixing hole 503, so as to realize connection and fixation of the second fitting member 500 and the first split body 210, and at this time, the second fitting member 500 and the first split body 210 can be connected by a side of the first split body 210 away from the second split body 220, so that the operation is simpler.

Specifically, a guide groove is formed on the side wall of the bearing groove 211, a guide portion slidingly engaged with the guide groove is formed on the second matching member 500, and the second matching member 500 is required to be inserted into the bearing groove 211 due to the need of rotating the fixing hole 503 and the through hole 212, so that the second matching member 500 can be inserted into the bearing groove 211 by matching the guide portion with the guide groove, the fixing hole 503 is ensured to rotate the through hole 212, and the connection of the second matching member 500 and the first split 210 is facilitated.

In one embodiment, as shown in fig. 2 and 9, the first fitting piece 400 is disposed outside the carrying groove 211, and the second fitting piece 500 includes an extending portion 530 extending into the carrying groove 211, and the extending portion 530 is disposed outside the first fitting piece 400. At this time, the first fitting piece 400 does not contact with the inner wall of the bearing groove 211, so that the friction force is prevented from being increased due to the direct contact between the first fitting piece 400 and the second fitting piece 500, and therefore, the torque caused by the friction force can be reduced, and the load of the pitch driving piece 300 can be reduced.

Specifically, the guiding portion is an elastic member, and the guiding portion is not protruded on the surface of the second matching member 500 by pressing, so that the installation of the bearing 600 and the snap spring is not affected.

In one embodiment, the pitch structure further includes a first mating member 400 and a second mating member 500, the first mating member 400 is connected to the handpiece 100, the second mating member 500 is connected to the first split 210, the second mating member 500 is sleeved outside the first mating member 400, and the pitch driving member 300 is used for driving the first mating member 400 and the second mating member 500 to rotate relatively. The second fitting piece 500 is sleeved outside the first fitting piece 400, and the pitching driving piece 300 can also be utilized to drive the first fitting piece 400 and the second fitting piece 500 to rotate relatively, and meanwhile, the second fitting piece 500 can limit and support the first fitting piece 400.

Specifically, the first matching piece 400 and the second matching piece 500 are both in cylindrical structures, and the central axes of the first matching piece 400 and the second matching piece 500 are also overlapped with the rotation axis of the machine head 100 relative to the bracket 200, so that when the pitching driving piece 300 drives the machine head 100 to shake, only torque generated by friction force in the rotation process needs to be overcome, the load of the pitching driving piece 300 is smaller, and the shaking is more stable and smooth.

Alternatively, the rotatable connection between the handpiece 100 and the second sub-body 220 may be provided with a rotation shaft on the handpiece 100, the second sub-body 220 is provided with a rotation shaft hole, and the rotation shaft is sleeved with a bearing 600 and extends into the rotation shaft hole, so as to realize the relative rotation between the second sub-body 220 and the handpiece 100. Or the assembly between the handpiece 100 and the second sub-body 220 may refer to the assembly between the first sub-body 210 and the handpiece 100, for example, the first matching piece 400 and the second matching piece 500 are provided between the handpiece 100 and the second sub-body 220, the first matching piece 400 is connected with the handpiece 100, the second matching piece 500 is connected with the second sub-body 220, the pitching driving piece 300 may be provided, and the matching structure between the first sub-body 210 and the handpiece 100 is used for driving the handpiece 100 to shake the head in cooperation with the matching structure between the first sub-body 210 and the handpiece 100, or the pitching driving piece 300 is not provided, and only the matching between the first sub-body 210 and the handpiece 100 is used for driving the handpiece 100 to shake the head.

As shown in fig. 1, an embodiment discloses a blowing device comprising a pitch structure as defined in any of the above.

According to the blowing device, the machine head 100 is rotatably connected with the first split 210 and the second split 220 respectively, so that the machine head 100 is supported by the first split 210 and the second split 220 in a matched manner, the pitching driving piece 300 can drive the machine head 100 to rotate relative to the bracket 200, the pitching angle of the machine head 100 is adjusted, the gravity center of the machine head 100 is located on the rotating axis of the machine head 100 relative to the bracket 200, at the moment, the pitching head of the machine head 100 is driven to pitch without overcoming the torque of the gravity center of the machine head 100 relative to the rotating axis, the required torque is small, the torque between the machine head 100 and the bracket 200 is mainly generated by the friction force at the joint of the machine head 100 and the bracket 200, the power output by the pitching driving piece 300 can drive the machine head 100 to pitch smoothly, the pitching head of the machine head 100 is easier to adjust, the pitching head of the machine head 100 is smoother, and the use experience of a user can be improved.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Claims (15)

1. The pitching structure is characterized by comprising a machine head, a bracket and a pitching driving piece, wherein the bracket comprises a first split body and a second split body which are arranged at intervals, the machine head is arranged between the first split body and the second split body, the machine head is respectively and rotatably connected with the first split body and the second split body, the pitching driving piece is a motor and is used for driving the machine head to rotate relative to the bracket, and the gravity center of the machine head is positioned on a rotating axis of the machine head relative to the bracket;

The pitching structure further comprises a first matching piece and a second matching piece, the first matching piece is connected with the machine head, the second matching piece is connected with the first split, the first matching piece is sleeved outside the second matching piece, and the pitching driving piece is used for driving the first matching piece and the second matching piece to rotate relatively; the pitching driving piece is arranged between the first matching piece and the machine head, an output shaft of the pitching driving piece is connected with the first matching piece, and a rotation axis of the output shaft coincides with a rotation axis of the machine head relative to the support.

2. A pitch structure according to claim 1, wherein one of the stator and rotor of the pitch drive is connected to the head and the other is connected to the first or second split, the axis of rotation of the rotor being coincident with the axis of rotation of the head relative to the support.

3. The pitch structure of claim 1, further comprising a bearing, the bearing being sleeved outside the second mating member, the bearing being disposed between the first mating member and the second mating member.

4. A pitching arrangement according to claim 3, wherein the first mating member is provided with an assembly hole, the second mating member is in engagement with the assembly hole, a spacing protrusion is provided in the assembly hole, and the spacing protrusion is adapted to abut against an end face of the bearing remote from the first split.

5. The pitch structure of claim 4, wherein the second mating member is provided with a first spacing portion and a second spacing portion, and the bearing is disposed between the first spacing portion and the second spacing portion.

6. The pitching arrangement of claim 5, wherein the second limiting portion is a snap spring, the first limiting portion is disposed at an end of the second mating member, a clamping groove is formed in the second mating member, and the second limiting portion is disposed at the snap spring.

7. The pitch structure of claim 1, wherein the second mating member is provided with a drive hole matching the output shaft, and a portion of a wall of the drive hole is a plane.

8. The pitching structure of claim 1, further comprising a first threaded member, wherein the pitching driving member is provided with a first limiting hole, the first mating member is provided with a second limiting hole, the machine head is provided with a third limiting hole, and the threaded member sequentially penetrates through the second limiting hole, the first limiting hole and the third limiting hole to be in threaded fit with the third limiting hole.

9. The pitching structure of claim 8, wherein a groove is formed in the machine head, a first protruding column and a second protruding column are arranged in the groove at intervals, the third limiting holes are formed in the end faces of the first protruding column and the second protruding column, two extending portions are arranged on two sides of the pitching driving element, the first limiting holes are formed in the extending portions, and the main body of the pitching driving element is arranged between the first protruding column and the second protruding column.

10. The pitching arrangement of claim 9, wherein the first post is provided with a first stop, the first stop defines a first arcuate slot for receiving the extension, the opening of the first arcuate slot is oriented in the direction of the second post, the second post is provided with a second stop, the second stop defines a second arcuate slot for receiving the extension, and the opening of the second arcuate slot is oriented in the direction of the first post.

11. The pitching structure of claim 8, further comprising a second threaded member, wherein the first mating member is provided with a fourth limiting aperture, the handpiece is provided with a fifth limiting aperture, the second threaded member is threaded through the fourth limiting aperture and is in threaded engagement with the fifth limiting aperture, and the second limiting aperture and the fourth limiting aperture are disposed at intervals along the circumference of the first mating member.

12. A pitch structure according to any one of claims 1 to 6 wherein the first split is provided with a bearing slot and wherein an end of the second mating member remote from the head extends into the bearing slot and is connected to the first split.

13. The pitch structure of claim 12, wherein the first mating member is disposed outside the bearing groove, and the second mating member comprises an extension into the bearing groove, the extension being disposed outside the first mating member.

14. The pitching arrangement of claim 1, further comprising a first mating member and a second mating member, wherein the first mating member is coupled to the handpiece, the second mating member is coupled to the first split member, the second mating member is sleeved outside the first mating member, and the pitching driving member is configured to drive the first mating member and the second mating member to rotate relative to each other.

15. A blowing device comprising a pitch structure according to any of claims 1 to 14.