阅读说明：本技术 一种适用于新能源汽车的充电枪 (Rifle charges suitable for new energy automobile ) 是由 卢江林 程鹏 杨贵英 卢佳园 熊如意 陈龙 鲁守卿 望君儒 于 2021-10-29 设计创作，主要内容包括：本发明属于新能源汽车技术领域,具体公开了一种适用于新能源汽车的充电枪,包括枪体本体和充电头,枪体本体包括握把和枪体本体,充电头设置在枪体本体一端,枪体本体还设有用于将枪体本体固定在汽车上的固定结构；固定结构包括固定环、固定杆、固定块和固定斜块,枪体本体开有固定腔,固定环、固定杆、固定块和固定斜块分别位于固定腔内,枪体本体靠近充电头的端部开有固定通孔,固定块能穿过固定通孔,固定斜块与固定块配合,固定环与固定腔转动配合,且固定环端面设有滑动槽,固定杆一端位于滑动槽内且与滑动槽滑动配合,固定杆与固定斜块连接。采用本方案的充电枪能够与新能源汽车紧密连接,减少甚至避免受到外界因素影响时而中断充电。(The invention belongs to the technical field of new energy automobiles, and particularly discloses a charging gun suitable for a new energy automobile, which comprises a gun body and a charging head, wherein the gun body comprises a grip and a gun body; fixed knot constructs including solid fixed ring, the dead lever, fixed block and fixed sloping block, rifle body is opened there is fixed chamber, gu fixed ring, the dead lever, fixed block and fixed sloping block are located fixed intracavity respectively, the tip that rifle body is close to the head that charges is opened there is fixing hole, the fixed block can pass fixing hole, fixed sloping block and fixed block cooperation, gu fixed ring and fixed chamber normal running fit, and gu fixed ring terminal surface is equipped with the sliding tray, dead lever one end is located the sliding tray and with sliding tray sliding fit, the dead lever is connected with fixed sloping block. The rifle that charges of this scheme of adoption can with new energy automobile zonulae occludens, reduce and avoid receiving external factor influence often interrupt charging even.)

1. The utility model provides a rifle that charges suitable for new energy automobile, includes the rifle body and is connected with the head that charges of power, its characterized in that: the charging gun comprises a gun body and a charging head, wherein the gun body comprises a grip and a gun body, the grip is connected with one end of the gun body, the charging head is arranged at one end of the gun body, and the gun body is also provided with a fixing structure for fixing the gun body on an automobile; fixed knot constructs including solid fixed ring, the dead lever, fixed block and fixed sloping block, rifle body is opened there is fixed chamber, gu fixed ring, the dead lever, fixed block and fixed sloping block are located fixed intracavity respectively, the tip that rifle body is close to the head that charges is opened there is fixing hole, fixing hole and fixed chamber intercommunication, the fixed block just can pass fixing hole with the vertical sliding fit in fixed chamber, fixed sloping block and fixed chamber horizontal sliding connection just cooperate with the fixed block, gu fixed ring and fixed chamber normal running fit, gu fixed ring terminal surface is equipped with the sliding tray, dead lever one end is located the sliding tray and with sliding tray sliding fit, the dead lever other end is connected with fixed sloping block.

2. The charging gun suitable for the new energy automobile according to claim 1, characterized in that: the device also comprises a driving unit for driving the fixing ring to rotate.

3. The charging gun suitable for the new energy automobile according to claim 2, characterized in that: the driving unit comprises a driving rod, a first spiral strip is arranged at one end of the driving rod, a driving through hole is formed in the middle of the fixing ring, the driving through hole is in threaded fit with the first spiral strip and is not self-locked, and the cross section of the driving through hole is rectangular.

4. The charging gun suitable for the new energy automobile according to claim 3, characterized in that: the fixed rod comprises a first outer rod, a first inner rod and a first pressure spring, one end of the first outer rod is in sliding fit with the sliding groove, a first cavity is formed in the other end of the first outer rod, one end of the first inner rod is connected with the fixed inclined block, the other end of the first inner rod is located in the first cavity and in sliding fit with the first cavity, the first pressure spring is located in the first cavity, and two ends of the first pressure spring are connected with the bottom wall of the first cavity and the first inner rod respectively.

5. The charging gun suitable for the new energy automobile according to claim 4, characterized in that: the guide rods are two in number and are respectively positioned on two sides of the fixed block; the guide rod comprises a second outer rod, a second inner rod and a second pressure spring, one end of the second outer rod is fixedly connected with the fixed block, a second cavity is formed in the other end of the second outer rod, one end of the second inner rod is connected with the inner wall of the fixed through hole, the other end of the second inner rod is located in the second cavity and in sliding fit with the second cavity, the second pressure spring is located in the second cavity, and two ends of the second pressure spring are respectively connected with the bottom wall of the second cavity and the end portion of the second inner rod.

6. The charging gun suitable for the new energy automobile according to claim 5, characterized in that: the tip of fixed block is equipped with the rubber layer, and the rubber layer terminal surface is equipped with a plurality of archs.

7. The charging gun suitable for the new energy automobile according to any one of claims 1 to 6, characterized in that: still include the lid, the lid with charge first joint and the lid is equipped with the structure of blowing that can blow to charging head.

Technical Field

The invention relates to the technical field of new energy automobiles, in particular to a charging gun suitable for a new energy automobile.

Background

At the present stage, consciousness of residents in China on environmental protection is gradually enhanced, the requirements on low-carbon life and low-carbon economy are stronger and stronger, and for the automobile industry, people urgently seek new engine technology to replace the traditional internal combustion engine technology, and new energy automobiles are also produced.

The new energy automobile adopts unconventional automobile fuel as a power source (or adopts conventional automobile fuel and a novel vehicle-mounted power device), integrates advanced technologies in the aspects of power control and driving of the automobile, and forms an automobile with advanced technical principle, new technology and new structure. The pure electric automobile is a common new energy automobile in the market at present, and is an automobile mainly adopting a storage battery as an energy storage power source.

For new energy automobiles, the new energy automobiles need to be charged, and a charging gun is needed in the charging process. However, in the prior art, the connection between the charging gun and the automobile charging hole is not tight enough, and the charging gun is easily separated from the automobile charging hole due to the influence of external factors, so that the charging is interrupted.

Disclosure of Invention

The invention aims to provide a charging gun suitable for a new energy automobile, which can be tightly connected with the new energy automobile, and reduces or even avoids the interruption of charging caused by external factors.

In order to achieve the above purpose, the basic scheme of the invention is as follows: a charging gun suitable for a new energy automobile comprises a gun body and a charging head connected with a power supply, wherein the gun body comprises a handle and a gun body, the handle is connected with one end of the gun body, the charging head is arranged at one end of the gun body, and the gun body is also provided with a fixing structure for fixing the gun body on the automobile; fixed knot constructs including solid fixed ring, the dead lever, fixed block and fixed sloping block, rifle body is opened there is fixed chamber, gu fixed ring, the dead lever, fixed block and fixed sloping block are located fixed intracavity respectively, the tip that rifle body is close to the head that charges is opened there is fixing hole, fixing hole and fixed chamber intercommunication, the fixed block just can pass fixing hole with the vertical sliding fit in fixed chamber, fixed sloping block and fixed chamber horizontal sliding connection just cooperate with the fixed block, gu fixed ring and fixed chamber normal running fit, gu fixed ring terminal surface is equipped with the sliding tray, dead lever one end is located the sliding tray and with sliding tray sliding fit, the dead lever other end is connected with fixed sloping block.

The working principle of the basic scheme is that when the charging gun is used, people can hold the handle by hands. When charging, the handle is held to move the whole charging gun, so that the charging head connected with the power supply is connected with the charging interface of the automobile correspondingly, and the aim of charging the automobile is fulfilled. After the charging head is connected with the automobile charging interface, the fixing structure is started. Namely, the fixing ring is rotated to rotate along the fixing cavity. Because solid fixed ring terminal surface is equipped with the sliding tray, the tip of dead lever is located the sliding tray and with sliding tray sliding fit, so when solid fixed ring rotates, can drive the horizontal lateral shifting of dead lever. And the end part of the fixed rod far away from the fixed ring is connected with a fixed oblique block, namely, the fixed oblique block can be driven to move towards the fixed block and be propped against the fixed block when the fixed ring rotates. The fixed oblique block can continuously move after abutting against the fixed block, an upward component force is further given to the fixed block, the fixed block moves upwards, the end portion of the fixed block penetrates through the fixed through hole to abut against the inner wall of the automobile charging hole, and the effect of fixing the whole charging gun is achieved.

After charging is completed, the fixing ring is rotated reversely, and the fixing ring rotates reversely and drives the fixing rod to move reversely. The fixed rod drives the fixed inclined block to move in the opposite direction when moving, so that the fixed inclined block is not contacted with the fixed block any more, the fixed block slides in the opposite direction to the initial position and is not abutted against the inner wall of the automobile charging hole, and then the charging gun can be pulled out.

When the charging gun of the scheme is adopted, the charging gun and the inner wall of the charging hole of the automobile can be firmly fixed when the new energy automobile is charged. Avoid the rifle that charges and the separation of car hole of charging when receiving external force.

Preferably, the device further comprises a driving unit for driving the fixing ring to rotate.

Preferably, the driving unit comprises a driving rod, a first spiral strip is arranged at one end of the driving rod, a driving through hole is formed in the middle of the fixing ring, the driving through hole is in threaded fit with the first spiral strip and is not self-locked, and the cross section of the driving through hole is rectangular. When needs rotate solid fixed ring, promote the actuating lever because the actuating lever is equipped with first spiral strip and drive through-hole screw-thread fit and not auto-lock, can drive solid fixed ring and rotate when promoting the actuating lever to trigger whole fixed unit work and fix the effect on car charging hole inner wall with the rifle that charges. And the pushing driving rod is more convenient to operate compared with the rotating fixing ring.

Preferably, the fixed rod comprises a first outer rod, a first inner rod and a first pressure spring, one end of the first outer rod is in sliding fit with the sliding groove, a first cavity is formed in the other end of the first outer rod, one end of the first inner rod is connected with the fixed inclined block, the other end of the first inner rod is located in the first cavity and is in sliding fit with the first cavity, the first pressure spring is located in the first cavity, and two ends of the first pressure spring are connected with the bottom wall of the first cavity and the first inner rod respectively. Under the original state, when the fixing ring rotates, the first outer rod moves to drive the first inner rod to move together, and the first pressure spring does not generate elastic deformation. But because the car of different motorcycle types hole that charges also is different in size, when charging the car that the mouth is less, rotates solid fixed ring, and first outer pole drives first interior pole and moves together just at the beginning and when the fixed block with car hole inner wall that charges offset the back, solid fixed ring still continues to rotate, first outer pole and first interior pole produce relative movement this moment. First interior pole removes in to first cavity promptly, and first pressure spring compression and energy storage have reached and to have fixed the rifle that charges, avoid the fixed block to the too big circumstances of destroying the car hole that charges of car hole application of force again.

Preferably, the device also comprises two guide rods, and the two guide rods are respectively positioned at two sides of the fixed block; the guide rod comprises a second outer rod, a second inner rod and a second pressure spring, one end of the second outer rod is fixedly connected with the fixed block, a second cavity is formed in the other end of the second outer rod, one end of the second inner rod is connected with the inner wall of the fixed through hole, the other end of the second inner rod is located in the second cavity and in sliding fit with the second cavity, the second pressure spring is located in the second cavity, and two ends of the second pressure spring are respectively connected with the bottom wall of the second cavity and the end portion of the second inner rod. When fixed block roll-off fixed through hole, remove in the second cavity in the second, the length of whole guide bar shortens, and the second pressure spring is compressed and the energy storage, and after the completion of charging, when fixed sloping block slided back, the initial position can be got back to the fixed block under the effect of second pressure spring, fixed block and fixed sloping block contact are fixed charging the rifle when conveniently charging next time.

Preferably, the end of the fixed block is provided with a rubber layer, and the end face of the rubber layer is provided with a plurality of protrusions. The rubber layer can avoid the fixed block to be rigid contact with the inner wall of the automobile charging hole, can protect the inner wall of the automobile charging hole, and the protrusions can increase the friction force between the fixed block and the inner wall of the automobile charging hole.

Preferably, still include the lid, the lid with charge first joint and the lid is equipped with the structure of blowing that can blow to the head that charges. When the automobile does not need to be charged, the cover body covers the charging head to protect the charging head, and the blowing structure can blow away dust and the like at the charging head.

Drawings

Fig. 1 is a perspective view of a first embodiment of a charging gun suitable for a new energy vehicle according to the present invention;

fig. 2 is a cross-sectional view of a gun body according to an embodiment of the charging gun for a new energy vehicle of the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 2;

fig. 4 is a perspective view of a fixing ring and a driving rod of a charging gun for a new energy vehicle according to an embodiment of the present invention;

FIG. 5 is a perspective view of a fixing ring of a charging gun according to an embodiment of the present invention;

FIG. 6 is a cross-sectional view of a fixing rod of a first embodiment of a charging gun for a new energy vehicle according to the present invention;

fig. 7 is a cross-sectional view of a cover in a second embodiment of a charging gun for a new energy vehicle according to the present invention;

fig. 8 is a schematic structural diagram of an air blowing mechanism in a second embodiment of the charging gun for a new energy vehicle according to the present invention.

Detailed Description

The following detailed description is preferred by way of specific embodiments:

reference numerals in the drawings of the specification include: the gun comprises a handle 10, a gun body 11, a charging head 12, an electric wire 13, a fixing through hole 14, a fixing cavity 20, a fixing rod 21, a fixing inclined block 22, a fixing block 23, a fixing ring 24, a sliding groove 25, a connecting plate 26, a driving through hole 27, a rubber layer 28, a protrusion 281, a guide rod 29, a first spiral strip 30, a driving rod 31, a first outer rod 41, a first cavity 42, a first pressure spring 43, a first inner rod 44, a cover body 51, a rotating rod 52, a second spiral strip 53, a connecting rod 54, a dust removal cavity 55, an outlet 56, an annular groove 57, a protection plate 58, a connecting outer ring 60, fan blades 61, a rotating through hole 62, a connecting inner ring 63, a one-way bearing 64 and a rotating plate 65.

Example one

This embodiment is substantially as shown in figures 1-6 of the drawings: the utility model provides a rifle that charges suitable for new energy automobile, includes rifle body 11 and the head 12 that charges that is connected with the power, and the head 12 that charges is connected with the power electricity through electric wire 13. The gun body 11 comprises a grip 10 and a gun body 11, the grip 10 is connected with one end of the gun body 11 in a clamping manner, the charging head 12 is arranged at one end of the gun body 11, and the gun body 11 is further provided with a fixing structure for fixing the gun body 11 on an automobile. Referring to fig. 2 and 3, the fixing structure includes a fixing ring 24, a fixing rod 21, a fixing block 23 and a fixing oblique block 22, the gun body 11 is provided with a fixing cavity 20, and the fixing ring 24, the fixing rod 21, the fixing block 23 and the fixing oblique block 22 are respectively located in the fixing cavity 20. The number of the fixing rods 21, the fixing blocks 23 and the fixing inclined blocks 22 is multiple, and the fixing rods 21 are uniformly arranged around the axial direction of the fixing ring 24. The fixed inclined block 22 is horizontally connected with the fixed cavity 20 in a sliding mode and matched with the fixed block 23, and the fixed ring 24 is matched with the fixed cavity 20 in a rotating mode. The inner wall of the fixing cavity 20 is also provided with a limiting bulge for limiting the axial movement of the fixing ring 24. The end face of the fixing ring 24 is provided with a sliding groove 25, the sliding groove 25 is wavy, one end of the fixing rod 21 is positioned in the sliding groove 25 and is in sliding fit with the sliding groove 25, and the other end of the fixing rod 21 is clamped with the fixing oblique block 22. The end of the fixed block 23 is provided with a rubber layer 28, and the end surface of the rubber layer 28 is provided with a plurality of protrusions 281.

Referring to fig. 6, the fixing rod 21 includes a first outer rod 41, a first inner rod 44 and a first pressure spring 43, one end of the first outer rod 41 is in sliding fit with the sliding groove 25, the other end of the first outer rod 41 is provided with a first cavity 42, one end of the first inner rod 44 is connected with the fixing sloping block 22, the other end of the first inner rod 44 is located in the first cavity 42 and is in sliding fit with the first cavity 42, the first pressure spring 43 is located in the first cavity 42, and two ends of the first pressure spring 43 are respectively connected with the bottom wall of the first cavity 42 and the first inner rod 44.

The end part of the gun body 11 close to the charging head 12 is provided with a fixing through hole 14, the fixing through hole 14 is communicated with a fixing cavity 20, and a fixing block 23 is vertically matched with the fixing cavity 20 in a sliding manner and can penetrate through the fixing through hole 14. The fixing structure in this embodiment further includes two guide rods 29, the two guide rods 29 are respectively located at two sides of the fixing block 23; each guide rod 29 comprises a second outer rod, a second inner rod and a second pressure spring, one end of the second outer rod is fixedly connected with the fixing block 23, the other end of the second outer rod is provided with a second cavity, one end of the second inner rod is connected with the inner wall of the fixing through hole 14, the other end of the second inner rod is located in the second cavity and is in sliding fit with the second cavity, the second pressure spring is located in the second cavity, and two ends of the second pressure spring are respectively connected with the bottom wall of the second cavity and the end of the second inner rod.

The charging gun in this embodiment further includes a driving unit that drives the fixed ring 24 to rotate. Referring to fig. 4 and 5, the driving unit includes a driving rod 31, a connecting plate 26 and a sector plate, wherein one end of the driving rod 31 is provided with a first spiral strip 30, the connecting plate 26 is located in the middle of one end of the fixing ring 24, the connecting plate 26 is welded to one end of the sector plate, and the other end of the sector plate is connected to the end of the fixing ring 24. The space between adjacent sectors may also allow for the passage of electrical wires and the like. The connecting plate 26 is provided with a driving through hole 27 at the middle part, and the cross section of the driving through hole 27 is rectangular. The drive through hole 27 is threadedly engaged with the first helical strip 30 and is not self-locking.

In the charging gun of the present embodiment, a person can hold the grip 10 with his hand. When charging, the whole charging gun is moved by holding the handle 10, so that the charging head 12 connected with the power supply is connected with the charging interface of the automobile correspondingly, thereby achieving the purpose of charging the automobile. After charging head 12 and the car interface connection that charges, start fixed knot and construct, promote actuating lever 31 promptly, because actuating lever 31 is equipped with first spiral strip 30 and drive through-hole 27 screw-thread fit and not auto-lock, can drive solid fixed ring 24 and rotate along fixed chamber 20 when promoting actuating lever 31. Because the end face of the fixing ring 24 is provided with the sliding groove 25, and the end of the fixing rod 21 is located in the sliding groove 25 and is in sliding fit with the sliding groove 25, when the fixing ring 24 rotates, the fixing rod 21 is driven to horizontally move. The end of the fixing rod 21 far from the fixing ring 24 is connected with a fixing inclined block 22, that is, when the fixing ring 24 rotates, the fixing inclined block 22 is driven to move towards the fixing block 23 and is abutted against the fixing block 23. The fixed inclined block 22 continuously moves after abutting against the fixed block 23 so as to provide an upward component force for the fixed block 23, the fixed block 23 moves upward, and the end part of the fixed block 23 penetrates through the fixed through hole 14 to abut against the inner wall of the automobile charging hole, so that the effect of fixing the whole charging gun is achieved. Including a plurality of fixed blocks 23 in this embodiment, and fixed block 23 evenly sets up along solid fixed ring 24 circumference for the rifle that charges is when being fixed, and the local atress with the car hole contact that charges is more even, and fixed effect is better moreover.

After charging is completed, the driving rod 31 is pulled outwards, the driving rod 31 drives the fixing ring 24 to rotate reversely, and the fixing ring 24 rotates reversely and drives the fixing rod 21 to move reversely. When the fixed rod 21 moves, the fixed inclined block 22 is driven to move in the opposite direction, so that the fixed inclined block 22 is not contacted with the fixed block 23 any more, the fixed block 23 slides in the opposite direction to the initial position and is not tightly propped against the inner wall of the automobile charging hole, and then the charging gun can be pulled out.

In the original state, when the fixing ring 24 rotates, the first outer rod 41 moves to drive the first inner rod 44 to move together, and the first pressure spring 43 does not generate elastic deformation. However, because the sizes of the car charging holes of different car models are different, when a car with a small charging port is charged, the fixing ring 24 is rotated, the first outer rod 41 drives the first inner rod 44 to move together at the beginning, and after the fixing block 23 abuts against the inner wall of the car charging hole, the fixing ring 24 continues to rotate, and at this time, the first outer rod 41 and the first inner rod 44 move relatively. That is, the first inner rod 44 moves in the first cavity 42, and the first pressure spring 43 compresses and stores energy, so that the charging gun can be fixed, and the situation that the automobile charging hole is damaged due to too large force applied to the automobile charging hole by the fixing block 23 is avoided.

When fixed block 23 roll-off fixed through hole 14, the second interior pole removes to the second cavity, and the length of whole guide bar 29 shortens, and the second pressure spring is compressed and the energy storage, and after the completion of charging, when fixed sloping block 22 slided backward, initial position can be got back to fixed block 23 under the effect of second pressure spring, and fixed block 23 is fixed the rifle that charges with fixed sloping block 22 contact when conveniently charging next time.

When the charging gun of the scheme is adopted, the charging gun and the inner wall of the charging hole of the automobile can be firmly fixed when the new energy automobile is charged. Avoid the rifle that charges and the separation of car hole of charging when receiving external force. The rubber layer 28 can prevent the fixed block 23 from being in rigid contact with the inner wall of the automobile charging hole, so that the inner wall of the automobile charging hole can be protected, and the protrusions 281 can increase the friction force between the fixed block 23 and the inner wall of the automobile charging hole.

Example two

As shown in fig. 7 to 8, the present embodiment is different from the first embodiment in that the present embodiment further includes a cover 51, the cover 51 is engaged with the charging head 12, and the cover 51 is provided with an air blowing structure capable of blowing air to the charging head 12. The inner wall of the cover body 51 is provided with an annular groove 57, the air blowing structure comprises fan blades 61, a connecting outer ring 60, a connecting inner ring 63, a one-way bearing 64 and a rotating plate 65, the rotating plate 65 is circular, and the center of the rotating plate 65 is provided with a rectangular rotating through hole 62. The number of the fan blades 61 is three, and the three fan blades 61 are uniformly arranged along the circumferential direction of the connecting inner ring 63. One end of each of the three blades 61 is connected to the inner connecting ring 63, and the other end is connected to the outer connecting ring 60. The connecting outer ring 60 is captured within the annular groove 57 and is rotatable within the annular groove 57. The one-way bearing 64 is located between the connection inner ring 63 and the rotating plate 65 and is connected to the connection inner ring 63 and the rotating plate 65, respectively.

The embodiment further comprises a rotating rod 52 and a second spiral strip 53, wherein one end of the rotating rod 52 is connected with one end of the second spiral strip 53; the rotating rod 52 is an elastic telescopic rod, the inner wall of the cover body 51 is provided with a connecting rod 54, and the other end of the rotating rod 52 is fixedly connected with the connecting rod 54. The second helical strip 53 passes through the rotation through hole 62 and is screw-engaged with the rotation through hole 62 without self-locking. A protective plate 58 is welded at the end part of the second spiral strip 53 far away from the rotating rod 52, a dust removal cavity 55 is arranged in the cover body 51, and the dust removal cavity 55 is positioned at the lower part of the cover body 51; the lower part of the dust removing cavity 55 is provided with an outlet 56.

When the vehicle is not required to be charged, the cover 51 covers the charging head 12 to protect the charging head 12, and prevent the charging head 12 from being flooded or damaged. After the charging port is inserted into the cover 51, the protection plate 58 contacts with the charging head first, and as the charging head 12 is inserted continuously, the protection plate 58 moves leftwards and drives the second spiral strip 53 to move leftwards, and the second spiral strip 53 moves leftwards, because the limitation of the annular groove 57 makes the whole connecting outer ring 60 and the part connected with the connecting outer ring 60 unable to move transversely, that is, the second spiral strip 53 cooperates with the rotating through hole 62 when rotating, so that the rotating plate 65 rotates and drives the connecting outer ring 60 to rotate through the one-way bearing 64. The blades 61 connected with the outer connecting ring 60 and the inner connecting ring 63 rotate together to generate wind power, so that air in the cover body 51 flows towards the dust removal cavity 55, dust of the charging head 12 is blown away, at the moment, the elastic telescopic rod stretches and retracts and stores energy, and then the cover body 51 is clamped with the charging gun. When charging is needed, the charging head 12 is pulled out, the elastic telescopic rod returns to the original shape, the second spiral strip 53 moves reversely, and the rotating plate 65 rotates reversely. However, because of the one-way bearing 64, the connection outer ring 60 and the connection inner ring 63 do not rotate, that is, the blades 61 do not rotate and generate wind, and air is not blown toward the charging head 12.

In this embodiment, a portion of the air and dust entering the dust removing chamber 55 is discharged through the outlet 56. And the outlet 56 is arranged at the lower end of the dust removing cavity 55, so that dust entering the cover body 51 from the outlet 56 can be reduced as much as possible.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.