A large-scale wind generating device

Abstract

The present application relates to the technical field of wind generation, and discloses a large-scale wind generation device, which includes a wind hood and an annular track. The annular track is located inside the wind hood. An air outlet is provided at the top end of the wind hood, and an air inlet passage is formed at the bottom end. A plurality of driving mechanisms are arranged equidistantly and circumferentially on the annular track. A wind blade is provided on each driving mechanism. A power supply mechanism for supplying electric energy to the plurality of driving mechanisms is arranged on the annular track. The plurality of driving mechanisms synchronously move circumferentially on the annular track and drive the plurality of wind blades to move. Each wind blade of the present application is individually driven by a driving mechanism. The plurality of driving mechanisms drive the plurality of wind blades to move synchronously on the annular track, which can reduce the load on the driving mechanism. When the size of the wind blade increases, the wind generation device can still operate stably for a long time, and thus can increase the air volume of the wind generation device.

Description

Technical Field

[0001] The present application relates to the field of wind generation technology, and in particular, to a large-scale wind generation device. Background Art

[0002] Large-scale wind generation devices have various functions such as transporting gas, ventilation, and drying. They are characterized by large volume, low energy consumption, and large transportation volume. With the development of technology and market demand, the application fields of large-scale wind generation devices are becoming more and more extensive.

[0003] Currently, most large-scale wind generation devices are fans. A fan includes a driving motor and blades. The driving motor drives the blades to rotate, thereby generating wind. The length of the blades determines the wind pressure of the fan. The longer the blade length, the greater the wind pressure of the fan, and the greater the amount of wind generated per unit time.

[0004] However, after the blade length increases, the contact area between the blades and the air increases, and the load resistance of the driving motor also increases accordingly. After long-term use, the driving motor is easily damaged, making it difficult for the fan to operate stably for a long time. Summary of the Invention

[0005] In order to increase the air volume of the wind generation device while the wind generation device operates stably for a long time, the present application provides a large-scale wind generation device.

[0006] The large-scale wind generation device provided by the present application adopts the following technical solution:

[0007] A large-scale wind generation device includes a wind hood and an annular track. The annular track is located inside the wind hood. An air outlet is provided at the top end of the wind hood, and an air inlet passage is formed at the bottom end. A plurality of driving mechanisms are equidistantly arranged around the annular track. A wind blade is provided on each driving mechanism. A power supply mechanism for supplying electric energy to the plurality of driving mechanisms is provided on the annular track. The plurality of driving mechanisms synchronously move around on the annular track and drive the plurality of wind blades to move.

[0008] By adopting the above technical solution, the power supply mechanism supplies power to the plurality of driving mechanisms, enabling the plurality of driving mechanisms to synchronously move around on the annular track. The driving mechanisms drive the wind blades to move. The plurality of wind blades synchronously move along the circumferential direction of the annular track, and suck the outside air from the air inlet passage into the wind hood. Under the action of the wind blades, the air sucked into the wind hood is discharged from the air outlet of the wind hood, thereby generating wind. With this arrangement, each wind blade is individually driven by a driving mechanism, and the plurality of driving mechanisms drive the plurality of wind blades to move synchronously on the annular track, which can reduce the load on the driving mechanisms. When the size of the wind blades increases, the wind generation device can still operate stably for a long time, and thus the air volume of the wind generation device can be increased.

[0009] Preferably, the driving mechanism includes a trolley housing, a driving member, a transmission member, and a plurality of rollers. The wind blade is fixedly arranged on the trolley housing. The plurality of rollers are rotatably arranged on both sides of the trolley housing. The driving member is arranged inside the trolley housing. The rollers are in transmission connection with the driving member through the transmission member. The rollers are rolling on the annular track.

[0010] By adopting the above technical solution, the driving member drives the plurality of rollers to rotate through the transmission member. The plurality of rollers roll on the annular track, thereby driving the trolley housing to move. The trolley housing then drives the wind blade to move on the annular track. With such an arrangement, one driving member drives one wind blade to move, and the plurality of rollers roll on the annular track, making the movement of the wind blade more stable.

[0011] Preferably, the thickness of the wind blade near the bottom end of the trolley housing is greater than that near the top end away from the trolley housing, and the height of the front end of the wind blade near the moving direction is lower than that of the rear end away from the moving direction.

[0012] By adopting the above technical solution, the greater thickness at the bottom end of the wind blade makes the structural strength of the wind blade higher. The front end of the wind blade near the moving direction is low and the rear end is high, making the wind-making effect of the wind blade better.

[0013] Preferably, reinforcing ribs are arranged on the trolley housing, and the reinforcing ribs are fixedly connected to the side wall of the wind blade away from the center of the annular guide rail.

[0014] By adopting the above technical solution, when the wind blade moves, the reinforcing ribs support the wind blade, thereby improving the structural strength of the wind blade.

[0015] Preferably, a connecting member is arranged at the end of the trolley housing along its moving direction. The plurality of trolley housings are sequentially connected end to end through the connecting member, and an activity gap is formed between the first and the last trolley housings.

[0016] By adopting the above technical solution, the plurality of driving mechanisms are sequentially connected through the connecting member, so that when the plurality of wind blades move, the relative positions between the wind blades are not likely to change, and thus the wind-making device is more stable when making wind. At the same time, the activity gap provides a gap for the slight movement of the plurality of trolley housings, thereby improving the stability of the driving mechanism moving on the annular track.

[0017] Preferably, the annular track includes a track bracket, an inner track, and an outer track. The inside of the track bracket is hollow and is located inside the wind cover. The inner track and the outer track are coaxially arranged on the track bracket, and the plurality of rollers are respectively rolling on the inner track and the outer track.

[0018] By adopting the above technical solution, the track bracket supports the inner track and the outer track, and the rollers roll on the inner track and the outer track, so that the driving mechanism moves more stably on the annular track, and further makes the movement of the wind blades more stable. At the same time, the track bracket with a hollow interior allows external air to enter the wind hood through the air inlet channel.

[0019] Preferably, a retaining ring is provided on each of the rollers, and the plurality of retaining rings respectively abut against the side walls of the inner track and the outer track that are close to each other.

[0020] By adopting the above technical solution, when the rollers roll on the inner track and the outer track, the retaining rings limit the rollers, so that the rollers are not easily slipped off from the inner track and the outer track, thereby improving the stability of the movement of the driving mechanism.

[0021] Preferably, the wind hood includes a fixing frame and a hood body. The fixing frame covers the annular track, the hood body is arranged in the fixing frame, and the outer wall of the hood body abuts against the inner wall of the fixing frame. The air outlet is formed at the top end of the hood body. The height of the bottom end of the hood body is greater than or equal to the height of the top end of the track bracket, and the air inlet channel is formed in the fixing frame at the bottom end of the hood body. The inner diameter of the bottom of the hood body is the same, and the inner diameter of the top of the hood body gradually decreases towards the direction close to the air outlet.

[0022] By adopting the above technical solution, external air is sucked into the hood body through the air inlet channel and the track bracket, and then discharged from the air outlet. During the process of gas discharge, the inner diameter of the hood body gradually decreases, so that the wind pressure for generating wind gradually increases. At the same time, the fixing frame supports the hood body, so that the hood body can still maintain stability when the wind pressure for generating wind increases.

[0023] Preferably, the power supply mechanism includes a power supply ring, a plurality of conductive members and a support rod. The plurality of support rods are fixedly arranged at equal intervals at the bottom of the power supply ring. The power supply ring is located inside the annular track. The plurality of conductive members are respectively fixedly arranged on the side walls of the plurality of trolley housings close to the power supply ring. The conductive members are electrically connected to the driving member, and the conductive members abut against the power supply ring.

[0024] By adopting the above technical solution, the power line supplies power to the power supply ring, and the power supply ring supplies power to the driving member through the conductive members, so that the driving mechanism can drive the wind blades to move on the annular guide rail. During the movement of the driving mechanism, the trolley housing drives the conductive members to move, and the conductive members always elastically abut against the power supply ring during the movement, so that the conductive members can continuously supply power to the driving mechanism.

[0025] Preferably, the conductive member includes a conductive rod and an elastic member. One end of the conductive rod is disposed on the outer shell of the trolley and electrically connected to the driving member. The other end of the conductive rod is bent downward and abuts against the inner side of the power supply ring. The elastic member is disposed on the conductive rod, and both ends of the elastic member are fixedly connected to the bent ends of the conductive rod respectively, so that the end of the conductive rod always abuts against the power supply ring during the movement.

[0026] By adopting the above technical solution, when the driving mechanism moves, the outer shell of the trolley drives the conductive rod to move. The conductive rod abuts against the power supply ring to provide power for the driving member. When the conductive rod moves, the elastic member acts on the conductive rod, so that the end of the conductive rod can always tightly abut against the inner side wall of the power supply ring, thereby improving the stability of the power supply of the power supply mechanism.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. By adopting a plurality of driving mechanisms to drive a plurality of fan blades to move synchronously, each fan blade is independently driven by a driving mechanism, which can reduce the load on the driving mechanism. When the size of the fan blade increases, the wind generating device can still operate stably for a long time, thereby increasing the air volume generated by the wind generating device.

[0029] 2. By adopting a fan blade with a greater thickness at the bottom end, the structural strength of the fan blade is higher. The front end of the fan blade is lower and the rear end is higher in the moving direction, so that the wind generating effect of the fan blade is better.

[0030] 3. By adopting a connecting member to connect a plurality of outer shells of the trolleys in sequence, when a plurality of fan blades move, the relative positions between the fan blades are not easily changed, so that the wind generating device is more stable when generating wind. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic diagram of the overall structure of the large-scale wind generating device of the present application;

[0032] Figure 2 is a sectional view of the overall structure of the large-scale wind generating device of the present application;

[0033] Figure 3 is a top view of a partial structure of the large-scale wind generating device of the present application;

[0034] Figure 4 is an exploded view of a partial structure of the large-scale wind generating device of the present application for highlighting the annular track and the power supply mechanism;

[0035] Figure 5 is a front view of the large-scale wind generating device of the present application for highlighting the driving mechanism;

[0036] Figure 6This is a partial structural schematic diagram of the large-scale wind generating device of the present application, highlighting the drive mechanism.

[0037] Description of reference numerals: 1, wind hood; 11, fixing frame; 12, hood body; 2, annular track; 21, track support; 22, inner track; 23, outer track; 3, air outlet; 4, air inlet channel; 5, drive mechanism; 51, trolley housing; 52, drive member; 53, transmission member; 54, roller; 6, wind blade; 7, power supply mechanism; 71, power supply ring; 72, conductive member; 721, conductive rod; 722, elastic member; 73, support rod; 8, reinforcing rib; 9, connecting member; 10, retaining ring; 13, backing plate; 14, counterweight; 15, clearance. Detailed implementation manners

[0038] The following Figures 1-6 further describes the present application in detail.

[0039] An embodiment of the present application discloses a large-scale wind generating device.

[0040] Referring to Figure 1 and 2 , a large-scale wind generating device includes a wind hood 1 fixedly installed on the ground and an annular track 2. The wind hood 1 covers the annular track 2. A circular air outlet 3 is formed at the top end of the wind hood 1, and an annular air inlet channel 4 is formed at the bottom end of the wind hood 1 and on the outer peripheral side of the annular track 2. External air can enter the wind hood 1 through the air inlet channel 4 and be discharged from the air outlet 3 of the wind hood 1.

[0041] Nine drive mechanisms 5 are placed around the annular track 2 at equal intervals and roll. A wind blade 6 is fixedly installed at the top end of each drive mechanism 5. An inner side of the annular track 2 is provided with a power supply mechanism 7 for supplying power to the nine drive mechanisms 5.

[0042] The nine drive mechanisms 5 drive the nine wind blades 6 to move synchronously on the annular track 2. When the nine wind blades 6 move, they can generate wind. External air is inhaled into the wind hood 1 through the air inlet channel 4 and then discharged from the air outlet 3 of the wind hood 1, thus completing wind generation. Each wind blade 6 is driven independently by a drive mechanism 5. The multiple drive mechanisms 5 drive the multiple wind blades 6 to move synchronously on the annular track 2, which can reduce the load on the drive mechanism 5. When the size of the wind blade 6 increases, the wind generating device can still operate stably for a long time, and thus can increase the air volume generated by the wind generating device.

[0043] In this application, the diameter of the annular track 2 is not limited. The annular track 2 with different diameters is set according to the actual required air volume for air production. The larger the required air volume for air production, the larger the diameter of the annular track 2. At the same time, the number of the driving mechanisms 5 is not limited either. The larger the diameter of the annular track 2, the more the number of the required driving mechanisms 5. Multiple driving mechanisms 5 can be arranged in a circle around the annular track 2.

[0044] Referring to Figure 3 , at the mutually approaching ends of every two adjacent driving mechanisms 5, they are all connected through a connecting member 9. The head and tail driving mechanisms 5 are not connected, and an activity gap 15 is formed between the head and tail driving mechanisms 5. In this application, the connecting member 9 can be selected as a movable hinge, and the two movable ends of the movable hinge are respectively fixedly connected to the two driving mechanisms 5.

[0045] Eight connecting members 9 connect nine driving mechanisms 5 in sequence, so that when the driving mechanisms 5 move at high speed, the relative positions between the nine blades are not likely to change, and further the air production device is more stable when producing air. The activity gap 15 provides a gap for slight movement for multiple driving mechanisms 5, thereby improving the stability of the driving mechanisms 5 moving on the annular track 2.

[0046] Referring to Figure 1 and 2 , specifically, the wind hood 1 includes a fixed frame 11 and a hood body 12. The bottom end of the fixed frame 11 is fixedly installed on the ground. The bottom ends of the fixed frame 11 have the same diameter and cover the annular track 2, and the diameter of the top end of the fixed frame 11 gradually decreases. The hood body 12 is welded and fixed to the inner side of the fixed frame 11. The outer side wall of the hood body 12 fits the inner side of the fixed frame 11, and the bottom ends of the hood body 12 have the same diameter while the top diameter gradually decreases. The air outlet 3 is formed at the top end of the hood body 12. The height of the bottom wall of the hood body 12 is equal to the height of the top end of the annular track 2, and the air inlet channel 4 is formed at the position of the fixed frame 11 below the bottom wall of the hood body 12.

[0047] External air enters the hood body 12 through the air inlet channel 4 and is discharged from the air outlet 3 of the hood body 12. During the process of air discharge, the inner diameter of the hood body 12 gradually decreases, so that the air pressure can be increased. At the same time, the fixed frame 11 supports the hood body 12, so that the hood body 12 can still maintain stability when the air pressure for air production is enhanced.

[0048] Referring to Figure 4, Specifically, the annular track 2 includes a track support 21, an inner track 22, and an outer track 23. The track support 21 is fixedly installed on the ground and is located within the fixed frame 11. The interior of the track support 21 is hollow, allowing outside air to enter the cover 12 through the air inlet passage 4. Two pads 13 are coaxially and fixedly installed on the top wall of the track support 21. The two pads 13 are respectively located on the inner and outer sides of the track support 21. The inner track 22 and the outer track 23 are coaxially and fixedly installed on the two pads 13, and the inner track 22 is located inside the outer track 23.

[0049] The driving mechanism 5 rolls on the inner track 22 and the outer track 23, thereby driving the wind blade 6 to move. When the driving mechanism 5 moves at high speed, the pads 13 play a buffering role, thereby protecting the track support 21.

[0050] Refer to Figure 5 and 6 , Specifically, the driving mechanism 5 includes a trolley housing 51, a driving member 52, two transmission members 53, and four rollers 54. The trolley housing 51 is arranged in an arc shape along the circumferential direction of the track support 21. The interior of the trolley housing 51 is hollow and the bottom is open. The connecting member 9 is fixedly installed at the end of the trolley housing 51 in the moving direction. The wind blade 6 is fixedly installed at the top of the trolley housing 51. The driving member 52 is fixedly installed in the inner cavity of the trolley housing 51 from the bottom opening end of the trolley housing 51. In this application, the driving member 52 can be selected as a double-headed spindle motor.

[0051] Refer to Figure 4 and 6 , The two transmission members 53 are respectively installed on both sides of the trolley housing 51 where the driving member 52 is located. The two transmission members 53 are respectively connected to the two driving ends of the driving member 52. The four rollers 54 are rotatably installed on the inner and outer sides of the trolley housing 51. Each transmission member 53 is in transmission connection with the two rollers 54 on the inner and outer sides of the trolley housing 51, and the rollers 54 are rollingly installed on the inner track 22 and the outer track 23. In this application, the transmission member 53 can be selected as a coupling and a rotating shaft. The two ends of the rotating shaft are respectively fixedly connected to the two rollers 54 on the inner and outer sides of the trolley housing 51. One end of the coupling is in transmission connection with the rotating shaft through a bevel gear set, and the other end is fixedly connected to the driving shaft of the driving member 52.

[0052] The driving member 52 drives the four rollers 54 to rotate synchronously through the two transmission members 53. The rollers 54 roll on the inner track 22 and the outer track 23, thereby driving the wind blade 6 to move through the trolley housing 51.

[0053] A retaining ring 10 is fixedly installed at one end of the circumferential side wall of each roller 54 close to the trolley. The four retaining rings 10 respectively abut against the side walls of the inner track 22 and the outer track 23 that are close to each other. The retaining ring 10 limits the roller 54, making it difficult for the roller 54 to slip off the inner track 22 and the outer track 23, thereby improving the stability of the movement of the driving mechanism 5.

[0054] Referring to Figure 2 and 5 , one end of the blade 6 close to its moving direction is inclined towards the outside of the annular track 2. The height of the front end of the blade 6 close to its moving direction is lower than the height of the rear end away from the moving direction. The thickness of the bottom end of the blade 6 close to the trolley housing 51 is greater than the thickness of the top end. In this way, the wind generating effect of the blade 6 is better, and the structural strength of the blade 6 is higher.

[0055] Three reinforcing ribs 8 are fixedly installed on the side wall of the blade 6 away from the inside of the annular track 2. The bottom of the reinforcing rib 8 is fixedly connected to the top of the trolley housing 51, and a plurality of holes are provided in the reinforcing rib 8. When the blade 6 moves, the reinforcing rib 8 supports the blade 6, thereby improving the structural strength of the blade 6. The holes in the reinforcing rib 8 facilitate the passage of air, thereby reducing the resistance suffered by the blade 6 during movement.

[0056] Referring to Figure 4 and 6 , specifically, the power supply mechanism 7 includes a power supply ring 71, nine conductive members 72 and six support rods 73. The six support rods 73 are all installed on the ground and are located inside the track support 21, and the six support rods 73 are fixedly connected by a horizontal connecting rod. The power supply ring 71 is placed on the outer side of the tops of the six support rods 73. A power cord is connected to the power supply ring 71 to supply power to it. The nine conductive members 72 are respectively installed on the side walls of the nine trolley housings 51 close to the inside of the track support 21. The conductive members 72 are electrically connected to the driving members 52, and the conductive members 72 abut against the power supply ring 71.

[0057] The power cord supplies power to the nine driving members 52 through the power supply ring 71 and the conductive members 72, so that the nine driving mechanisms 5 can synchronously drive the nine blades 6 to move.

[0058] The conductive member 72 includes a conductive rod 721 and an elastic member 722. The conductive rod 721 is L-shaped. One end of the conductive rod 721 is fixedly installed on the side wall of the trolley housing 51 and is electrically connected to the driving member 52. The other end of the conductive rod 721 is bent downward and abuts against the outer side of the power supply ring 71. The two ends of the elastic member 722 are respectively fixedly connected to the bottom walls of the two bent rods of the conductive rod 721. In this application, the elastic member 722 can be selected as a spring. Through the elastic action of the elastic member 722, when the driving mechanism 5 moves at high speed, the conductive rod 721 can always abut against the outer side of the power supply ring 71, thereby improving the stability of the power supply of the power supply mechanism 7.

[0059] The implementation principle of the embodiment of this application is as follows: The power cord supplies power to nine driving components 52 through the power supply ring 71 and the conductive component 72. The nine driving components 52 drive the trolley housing 51 to move synchronously on the annular track 2 through the transmission component 53 and the roller 54, and then drive the nine fan blades 6 to move. When the nine fan blades 6 move, they can generate wind. The outside air is inhaled into the wind hood 1 through the air inlet channel 4 and then discharged from the air outlet 3 of the wind hood 1, thus completing the wind generation. Each fan blade 6 is individually driven by a driving mechanism 5. The multiple driving mechanisms 5 drive the multiple fan blades 6 to move synchronously on the annular track 2, which can reduce the load on the driving mechanism 5. In the case of an increase in the size of the fan blade 6, the wind generating device can still operate stably for a long time, and thus can increase the air volume of the wind generating device.

[0060] The above are all the preferred embodiments of this application. The protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A large-scale wind generating device, characterized in that: It includes a wind hood (1) and an annular track (2). The annular track (2) is located inside the wind hood (1). An air outlet (3) is provided at the top end of the wind hood (1), and an air inlet channel (4) is formed at the bottom end. A plurality of driving mechanisms (5) are arranged equidistantly and circumferentially on the annular track (2). A wind blade (6) is provided on each driving mechanism (5). A power supply mechanism (7) for supplying electric energy to the plurality of driving mechanisms (5) is provided on the annular track (2). The plurality of driving mechanisms (5) synchronously move circumferentially on the annular track (2) and drive the plurality of wind blades (6) to move. The driving mechanism (5) includes a trolley housing (51), a driving member (52), a transmission member (53) and a plurality of rollers (54). The wind blade (6) is fixedly arranged on the trolley housing (51). The plurality of rollers (54) are rotatably arranged on both sides of the trolley housing (51). The driving member (52) is arranged inside the trolley housing (51). The rollers (54) are in transmission connection with the driving member (52) through the transmission member (53). The rollers (54) are rollingly arranged on the annular track (2). A connecting member (9) is arranged at the end of the trolley housing (51) along its moving direction. The plurality of trolley housings (51) are connected end to end in sequence through the connecting member (9), and a movable gap (15) is formed between the head and the tail trolley housings (51). The annular track (2) includes a track support (21), an inner track (22) and an outer track (23). The inside of the track support (21) is hollow and is located inside the wind hood (1). The inner track (22) and the outer track (23) are coaxially arranged on the track support (21), and the plurality of rollers (54) are respectively rollingly arranged on the inner track (22) and the outer track (23).

2. The large-scale wind generating device according to claim 1, characterized in that: The thickness of the bottom end of the wind blade (6) close to the trolley housing (51) is greater than the thickness of the top end far from the trolley housing (51). The height of the front end of the wind blade (6) close to the moving direction is lower than the height of the rear end far from the moving direction.

3. The large-scale wind generating device according to claim 2, characterized in that: Reinforcing ribs (8) are arranged on the trolley housing (51). The reinforcing ribs (8) are fixedly connected to the side wall of the wind blade (6) far from the center of the annular track (2).

4. A large-scale wind generating device according to claim 1, characterized in that: A retaining ring (10) is arranged on each roller (54). The plurality of retaining rings (10) respectively abut against the side walls of the inner track (22) and the outer track (23) close to each other.

5. The large-scale wind generating device according to claim 1, characterized in that: The wind hood (1) includes a fixing frame (11) and a cover body (12). The fixing frame (11) covers the annular track (2). The cover body (12) is arranged inside the fixing frame (11), and the outer wall of the cover body (12) abuts against the inner wall of the fixing frame (11). The air outlet (3) is formed at the top end of the cover body (12). The height of the bottom end of the cover body (12) is greater than or equal to the height of the top end of the track support (21), and the air inlet channel (4) is formed in the fixing frame (11) at the bottom end of the cover body (12). The inner diameter of the bottom of the cover body (12) is the same, and the inner diameter of the top of the cover body (12) gradually decreases in the direction close to the air outlet (3).

6. A large-scale wind generating device according to claim 1, characterized in that: The power supply mechanism (7) includes a power supply ring (71), a plurality of conductive members (72) and support rods (73). The plurality of support rods (73) are fixedly arranged at equal intervals at the bottom of the power supply ring (71). The power supply ring (71) is located inside the annular track (2). The plurality of conductive members (72) are respectively fixedly arranged on the side walls of the plurality of trolley housings (51) close to the power supply ring (71). The conductive members (72) are electrically connected to the driving members (52), and the conductive members (72) are in contact with the power supply ring (71).

7. The large-scale wind generating device according to claim 6, characterized in that: The conductive member (72) includes a conductive rod (721) and an elastic member (722). One end of the conductive rod (721) is arranged on the trolley housing (51) and is electrically connected to the driving member (52). The other end of the conductive rod (721) is bent downward and abuts against the inner side of the power supply ring (71). The elastic member (722) is arranged on the conductive rod (721). The two ends of the elastic member (722) are respectively fixedly connected to the bent ends of the conductive rod (721) so that the end of the conductive rod (721) always abuts against the power supply ring (71) during the movement process.

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