A pesticide - spraying drone with multiple spray heads

Abstract

The present invention provides a pesticide spraying drone with multiple spraying heads, which relates to the technical field of drones. The pesticide spraying drone with multiple spraying heads includes an upper body, a lower body, four first spraying mechanisms and four second spraying mechanisms. A base is fixedly arranged at the midpoint position inside the lower body. A threaded rod is rotatably arranged at the midpoints of both sides of the inner wall of the base, and a guide rod is fixedly arranged at the rear end position of the threaded rod. A linkage plate is threadedly sleeved on the outer wall of the threaded rod, and the linkage plate is slidably sleeved on the guide rod. A linkage rod is fixedly arranged on one side of the lower end surface of the linkage plate, and a second toothed push block is fixedly arranged at the end of the linkage rod away from the linkage plate. By designing two groups of spraying mechanisms, the two groups of spraying mechanisms can complete various spraying methods such as up-and-down staggered clamping spraying, quasi-spiral spraying and cross-shaped spraying according to requirements, meeting the needs of different spraying scenarios, with stronger functionality and more convenient use.

Description

Technical Field

[0001] The present invention relates to the technical field of drones, and specifically relates to a pesticide-spraying drone with multiple spraying heads. Background Art

[0002] The pesticide-spraying drone, also known as a plant protection drone and also called an unmanned aerial vehicle, as the name implies, is an unmanned aircraft used for agricultural and forestry plant protection operations. This drone consists of three parts: a flight platform (fixed-wing, helicopter, multi-rotor aircraft), a navigation and flight control system, and a spraying mechanism. Through ground remote control or navigation and flight control, spraying operations can be achieved, and it can spray agents, seeds, powders, etc. The pesticide-spraying drone has many advantages such as a low operation height, less drift, the ability to hover in the air, no need for a dedicated takeoff and landing airport, and the spraying operation personnel are protected from the danger of pesticides, improving the safety of spraying operations. Compared with gasoline-powered drones, electric drones are smaller in overall size, lighter in weight, have a lower depreciation rate, a relatively low unit operation labor cost, and are easy to maintain.

[0003] Currently, the pesticide-spraying drones on the market generally have different types of nozzle-equipped drones according to the crops to be sprayed. For environments such as large-area evenly planted paddy fields, a downward spraying method is generally directly adopted. For some fruit trees with plants, in order to ensure the spraying effect on individual fruit trees, a single-point spraying method is generally used in combination with a nozzle that can extend into the branches and vines of the fruit trees. Due to the fixed installation position of the nozzles of the existing pesticide-spraying drones, it is impossible to quickly adjust and use them. At the same time, although there are some functions for adjusting the nozzle angle in the existing pesticide-spraying drones, the function of changing the spraying shape cannot be changed, and it is difficult to quickly adjust and use them according to the needs in a scenario-based manner. Summary of the Invention

[0004] To achieve the above objectives, the present invention is realized through the following technical solutions: A pesticide-spraying drone with multiple spraying heads includes an upper body, a lower body, four first spraying mechanisms, and four second spraying mechanisms. At the midpoint position inside the lower body, a base is fixedly provided. At the midpoints on both sides of the inner wall of the base, a threaded rod is rotatably provided, and a guide rod is fixedly provided at the rear end position of the threaded rod. A linkage plate is threadedly sleeved on the outer wall of the threaded rod, and the linkage plate is slidably sleeved on the guide rod. On one side of the lower end surface of the linkage plate, a linkage rod is fixedly provided, and at the end of the linkage rod away from the linkage plate, a second toothed push block is fixedly provided. At the midpoint of the front end of the upper surface of the base, a servo motor is fixedly provided. The output end of the servo motor is fixedly provided with a screw rod, and a worm gear is fixedly sleeved at the midpoint on the outside of the screw rod. One end of the screw rod away from the servo motor is threadedly sleeved with a first toothed push block;

[0005] The first spraying mechanism includes a spraying main board. One end of the spraying main board is fixedly provided with a connecting board. One end of the connecting board away from the spraying main board is fixedly provided with a first connecting column, and the first connecting column is rotatably arranged on the top end face of the inner wall of the lower body. The lower end of the first connecting column is fixedly sleeved with a first gear. Inside the end of the spraying main board away from the connecting board, a driving component is fixedly arranged. The driving component includes a first micro-motor and a driving shaft. The upper end of the driving shaft is fixedly sleeved with a rotating block. Inside one side of the rotating block, a driving gear is rotatably arranged, and a linkage gear is arranged through a rotatably installed rotating shaft at the lower end of the driving gear. At the same time, auxiliary spraying boards are fixedly connected to both sides of the outer wall of the rotating shaft.

[0006] Four second connecting columns are rotatably arranged on the lower end face of the base, and the lower ends of the four second connecting columns are respectively fixedly connected to the four second spraying mechanisms. On the four second connecting columns, second gears are fixedly sleeved at the upper ends of the second spraying mechanisms.

[0007] Preferably, four wings for take-off driving are arranged on the outer wall of the upper body. Sliding grooves are opened at the front, rear, both sides of the upper end face and both sides of the lower end face of the lower body. The four first spraying mechanisms are respectively arranged in two groups and slide in the two upper sliding grooves among the four sliding grooves. The four second spraying mechanisms are respectively arranged in two groups and slide in the two lower sliding grooves among the four sliding grooves.

[0008] Preferably, the upper body includes a housing and a storage tank embedded in the housing. At the bottom end inside the housing, a pump body and a diversion pipe are also arranged. One end of the diversion pipe is connected to the pump body, and a plurality of interfaces are arranged on the diversion pipe. Liquid inlet pipes are fixedly arranged on the lower end face of the connecting board and on one side of the outer wall of the second spraying mechanism. The liquid inlet pipe at the lower end of the connecting board penetrates through to the inside of the spraying main board. The plurality of liquid inlet pipes are respectively connected to the plurality of interfaces.

[0009] Preferably, a plurality of atomizing nozzles are fixedly arranged on the lower end face of the spraying main board and the lower end face of the second spraying mechanism, and the atomizing nozzles are connected to the liquid inlet pipes.

[0010] Preferably, two of the four first gears located at the rear are respectively meshed with the teeth on both sides of the outer wall of the first toothed push block. Two of the four first gears in the same longitudinal direction are meshed with each other. The worm is meshed with the worm gear. Guide blocks for restricting their rotation are arranged at the lower end of the first toothed push block and the upper end of the second toothed push block, and the two guide blocks slide on the upper end face and the lower end face of the base respectively.

[0011] Preferably, two of the four second gears in the same transverse direction are meshed with each other, and two of the four second gears in the longitudinal direction close to the second toothed push block are respectively meshed with the teeth on the front and rear sides of the outer wall of the second toothed push block.

[0012] Preferably, a connecting pipe is installed on one side of the lower end of the auxiliary spray plate close to the rotating block and the connecting pipe is connected to the liquid inlet pipe, and a plurality of atomizing nozzles are installed on the lower end of the auxiliary spray plate and the atomizing nozzles are connected to the connecting pipe.

[0013] Preferably, a connecting shaft is fixedly arranged at the midpoint of the driving gear and a second micro motor is fixedly arranged at one end of the connecting shaft, and the driving gear is meshed with the linkage gear.

[0014] The present invention provides a pesticide spreading drone with multiple spray heads. It has the following beneficial effects:

[0015] The invention provides a pesticide spreading UAV with multiple spray heads. The UAV is provided with two groups of spray mechanisms on a lower body. The two groups of spray mechanisms are staggered in an upper and lower manner. The two groups of spray mechanisms staggered in an upper and lower manner can not only adjust the angles between the two spray mechanisms, so as to realize the adjustment function of the spraying angle range, but also a spray mechanism No. 1 located at the upper end is composed of two parts, namely, a main spraying part and an auxiliary spraying part. The auxiliary spraying part can realize a flipping adjustment function, and after flipping, it forms a spiral spraying shape with the main spraying part and the No. 2 spray mechanism at the lower end. By arranging the upper and lower groups of spray mechanisms, the upper and lower groups of spray mechanisms can be adjusted and used in linkage, and form a cross-shaped structure after the linkage adjustment, so as to realize a three-row parallel spraying mode. Therefore, the UAV has more diversified spraying modes, and is more diversified in use, so as to be suitable for use in spraying environments with various requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the shaft side structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the internal linkage structure of the first spraying mechanism and the second spraying mechanism of the present invention;

[0018] Figure 3 For the present invention Figure 2 A top view structural diagram of ;

[0019] Figure 4 For the present invention Figure 2 A schematic diagram of a partial top view structure;

[0020] Figure 5 It is a partial side view structural schematic diagram of the first spraying mechanism of the present invention;

[0021] Figure 6Schematic structural diagram of the unfolded form of the first spraying mechanism of the present invention;

[0022] Figure 7 For the present invention Figure 6 Schematic side view structure diagram of the combined form.

[0023] Among them, 1. Upper body; 2. Wing; 3. First spraying mechanism; 301. Spraying main board; 302. Rotating block; 303. Auxiliary spraying board; 304. Driving gear; 305. Rotating shaft; 306. Linkage gear; 307. Connecting plate; 308. Liquid inlet pipe; 309. Driving component; 3010. Connecting pipe; 4. Second spraying mechanism; 5. Lower body; 6. Chute; 7. First connecting column; 8. First gear; 9. First toothed push block; 10. Worm gear; 11. Worm; 12. Base; 13. Servo motor; 14. Second toothed push block; 15. Second gear; 16. Linkage plate; 17. Linkage rod; 18. Guide rod; 19. Threaded rod. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Embodiment:

[0026] As Figures 1-7 shown, the embodiment of the present invention provides a pesticide spraying unmanned aerial vehicle with multiple spraying heads, including an upper body 1, a lower body 5, four first spraying mechanisms 3 and four second spraying mechanisms 4. A base 12 is fixedly arranged at the midpoint position inside the lower body 5. A threaded rod 19 is rotatably arranged at the midpoints on both sides of the inner wall of the base 12, and a guide rod 18 is fixedly arranged at the rear end position of the threaded rod 19. A linkage plate 16 is threadedly sleeved on the outer wall of the threaded rod 19, and the linkage plate 16 is slidably sleeved on the guide rod 18. A linkage rod 17 is fixedly arranged on one side of the lower end surface of the linkage plate 16, and a second toothed push block 14 is fixedly arranged at the end of the linkage rod 17 away from the linkage plate 16. A servo motor 13 is fixedly arranged at the midpoint of the front end of the upper end surface of the base 12. A screw rod is fixedly arranged at the output end of the servo motor 13, and a worm 11 is fixedly sleeved at the midpoint of the outer side of the screw rod. One end of the screw rod away from the servo motor 13 is threadedly sleeved with a first toothed push block 9; Four second connecting columns are rotatably arranged on the lower end surface of the base 12, and the lower ends of the four second connecting columns are respectively fixedly connected to the four second spraying mechanisms 4. Among them, second gears 15 are fixedly sleeved on the four second connecting columns at the upper ends of the second spraying mechanisms 4;

[0027] Specifically, the servo motor 13 starts to drive the screw at the output end to rotate, and after the screw rotates, it drives the No. 1 toothed push block 9 with the outer thread sleeve to move horizontally, wherein the two No. 1 gears 8 located at the rear end of the four No. 1 gears 8 are respectively meshed with the teeth on both sides of the outer wall of the No. 1 toothed push block 9, and the two No. 1 gears 8 in the same longitudinal direction of the four No. 1 gears 8 are meshed with each other, and the worm 11 is meshed with the worm wheel 10, and the lower end of the No. 1 toothed push block 9 and the upper end of the No. 2 toothed push block 14 are both provided with guide blocks for limiting their rotation, and the two guide blocks are respectively located on the upper end surface and the lower end surface of the base 12 for sliding; the two No. 2 gears 15 in the same transverse direction of the four No. 2 gears 15 are meshed with each other, and the two No. 2 gears 15 in the longitudinal direction close to the No. 2 toothed push block 14 of the four No. 2 gears 15 are respectively meshed with the teeth on the front and rear sides of the outer wall of the No. 2 toothed push block 14;

[0028] That is, the No. 1 toothed push block 9 cannot rotate after being restricted, so that it can only perform longitudinal translation. When the No. 1 toothed push block 9 performs longitudinal translation, it will drive the No. 1 gear 8 meshing on both sides to rotate. Since the two No. 1 gears 8 in the longitudinal direction between the four No. 1 gears 8 are also meshed with each other, the four No. 1 gears 8 are linked to rotate when the No. 1 toothed push block 9 moves. When the four No. 1 gears 8 rotate, the angle rotation adjustment of the four No. 1 spraying mechanisms 3 at the upper end can be completed, thereby changing the spraying angle range; and since the outer worm 11 rotates when the screw rotates, the worm 11 rotates the worm wheel 10 at the lower end. The worm gear 10 drives the threaded rod 19 to rotate, causing the linkage plate 16 threadedly sleeved on the outer side of the threaded rod 19 to move laterally. After the linkage plate 16 moves laterally, it drives the linkage rod 17 at the lower end to pull the No. 2 toothed push block 14 to move. When the No. 2 toothed push block 14 moves, it drives the two No. 2 gears 15 meshing on the outer side to move, and the two No. 2 gears 15 in the lateral direction between the four No. 2 gears 15 mesh with each other, and finally completes the linkage rotation of the four No. 2 gears 15, thereby realizing the angle adjustment function of the four No. 2 spraying mechanisms 4 at the lower end, that is, in the process of completing the rotation of the No. 1 spraying mechanism 3 and the No. 2 spraying mechanism 4, the following can be formed. Figure 1 and forming a cross-shaped shape after the two No. 1 spraying mechanisms 3 are combined and the two No. 2 spraying mechanisms 4 are combined;

[0029] At the same time, since the number of teeth on the first gear 8 is greater than that on the second gear 15, the number of teeth on the second gear 15 is two-thirds of that on the first gear 8, the first spray mechanism 3 and the second spray mechanism 4 are linked but with different rotation angles.

[0030] Reference Figures 1-7, the first spraying mechanism 3 includes a spraying main body plate 301. One end of the spraying main body plate 301 is fixedly provided with a connecting plate 307. One end of the connecting plate 307 away from the spraying main body plate 301 is fixedly provided with a first connecting column 7, and the first connecting column 7 is rotatably arranged on the top end surface of the inner wall of the lower body 5. A first gear 8 is fixedly sleeved at the lower end of the first connecting column 7. Inside the end of the spraying main body plate 301 away from the connecting plate 307, a driving component 309 is fixedly provided. The driving component 309 includes a first micro motor and a driving shaft. The upper end of the driving shaft is fixedly sleeved with a rotating block 302. Inside one side of the rotating block 302, a driving gear 304 is rotatably arranged, and a linkage gear 306 is arranged through a rotatably installed rotating shaft 305 at the lower end of the driving gear 304. At the same time, auxiliary spraying plates 303 are fixedly connected to both sides of the outer wall of the rotating shaft 305; A connecting shaft is fixedly provided at the midpoint of the driving gear 304, and a second micro motor is fixedly provided at one end of the connecting shaft. The driving gear 304 and the linkage gear 306 are meshed;

[0031] Specifically, during use, the first micro motor can be started to drive the driving shaft at the output end to rotate. The rotation of the driving shaft drives the rotating block 302 fixedly connected to the outside to rotate. At this time, the auxiliary spraying plates 303 linked with the rotating block 302 rotate, causing the entire first spraying mechanism 3 to be divided into two component parts; After the auxiliary spraying plates 303 complete the horizontal circular rotation along the driving shaft, the second micro motor can be started to drive the inner driving gear 304 to rotate. The driving gear 304 drives the linkage gear 306 to rotate, causing the rotating shaft 305 to rotate, and then causing the auxiliary spraying plates 303 fixedly connected to the rotating shaft 305 to perform the flipping function in the up and down direction. After the auxiliary spraying plates 303 complete the flipping in the up and down direction, a spiral-like structure is formed with the spraying main body plate 301 at the upper end and the second spraying mechanism 4 at the lower end, thereby changing the spraying method.

[0032] Refer to Figures 1-7 , four wings 2 for takeoff driving are arranged on the outer wall of the upper body 1. Sliding grooves 6 are opened at the front and rear ends of the upper end surface and on both sides of the lower end surface of the lower body 5. The four first spraying mechanisms 3 are grouped in pairs and respectively slidably arranged in the two upper sliding grooves 6 among the four sliding grooves 6, and the four second spraying mechanisms 4 are grouped in pairs and respectively slidably arranged in the two lower sliding grooves 6 among the four sliding grooves 6;

[0033] Specifically, propellers for takeoff are arranged on the four wings 2 to complete the takeoff function of the entire drone; The setting of the sliding grooves 6 ensures the maximum movement trajectory and guiding function of the first spraying mechanism 3 and the second spraying mechanism 4.

[0034] Refer to Figures 1-7, the upper body 1 includes a housing and a material storage tank embedded inside the housing. A pump body and a diversion pipe are further arranged at the bottom end inside the housing. One end of the diversion pipe is connected to the pump body, and a plurality of interfaces are arranged on the diversion pipe. Liquid inlet pipes 308 are fixedly arranged on the lower end face of the connecting plate 307 and on one side of the outer wall of the second spraying mechanism 4. The liquid inlet pipe 308 located at the lower end of the connecting plate 307 penetrates through to the inside of the spraying main body plate 301, and the plurality of liquid inlet pipes 308 are respectively connected to the plurality of interfaces. A plurality of atomizing nozzles are fixedly arranged on the lower end face of the spraying main body plate 301 and on the lower end face of the second spraying mechanism 4, and the atomizing nozzles are connected to the liquid inlet pipes 308; A connecting pipe 3010 is installed on one side of the lower end of the auxiliary spraying plate 303 close to the rotating block 302, and the connecting pipe 3010 is communicated with the liquid inlet pipe 308. A plurality of atomizing nozzles are installed on the lower end face of the auxiliary spraying plate 303, and the atomizing nozzles are connected to the connecting pipe 3010;

[0035] Specifically, when spraying, the pump body is used to pump the liquid pesticide to be sprayed into the diversion pipe. Since the interfaces on the diversion pipe are communicated with the liquid inlet pipes 308, the liquid pesticide is promoted to flow into the liquid inlet pipes 308 along the diversion pipe, and the liquid inlet pipes 308 are connected to a plurality of atomizing nozzles, so that the liquid pesticide is sprayed by using the atomizing nozzles.

[0036] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pesticide spraying drone with multiple spray heads, comprising an upper body (1), a lower body (5), four No. 1 spraying mechanisms (3) and four No. 2 spraying mechanisms (4), characterized in that: A base (12) is fixedly provided at the midpoint of the interior of the lower machine body (5); threaded rods (19) are rotatably provided at the midpoints of both sides of the inner wall of the base (12); and a guide rod (18) is fixedly provided at the rear end of the threaded rod (19); a linkage plate (16) is threadedly sleeved on the outer wall of the threaded rod (19); and the linkage plate (16) is slidably sleeved on the guide rod (18); a linkage rod (17) is fixedly provided on one side of the lower end surface of the linkage plate (16); and a second toothed push block (14) is fixedly provided at the end of the linkage rod (17) away from the linkage plate (16); a servo motor (13) is fixedly provided at the midpoint of the front end of the upper end surface of the base (12); a screw is fixedly provided at the output end of the servo motor (13); and a worm (11) is fixedly sleeved at the midpoint of the outer side of the screw; and a first toothed push block (9) is threadedly sleeved on the end of the screw away from the servo motor (13); The No. 1 spraying mechanism (3) comprises a spraying main body plate (301), one end of the spraying main body plate (301) is fixedly provided with a connecting plate (307), an end of the connecting plate (307) away from the spraying main body plate (301) is fixedly provided with a No. 1 connecting column (7), and the No. 1 connecting column (7) is rotatably arranged on the top surface of the inner wall of the lower body (5), the lower end of the No. 1 connecting column (7) is fixedly sleeved with a No. 1 gear (8), and the spraying main body plate (301) away from the connecting plate (307) is fixedly provided with a No. 1 connecting column (7). ) is fixedly provided with a driving assembly (309) at one end thereof, the driving assembly (309) comprising a first micro motor and a driving shaft, wherein a rotating block (302) is fixedly sleeved on the upper end of the driving shaft, a driving gear (304) is rotatably provided on one side of the rotating block (302), and a linkage gear (306) is provided at the lower end of the driving gear (304) through a rotating shaft (305) rotatably installed, and both sides of the outer wall of the rotating shaft (305) are fixedly connected to auxiliary spray plates (303); The base (12) is rotatably provided with four No. 2 connecting columns on the lower end surface thereof, and the lower ends of the four No. 2 connecting columns are respectively fixedly connected to four No. 2 spraying mechanisms (4), wherein a No. 2 gear (15) is fixedly sleeved at the upper end of the No. 2 spraying mechanism (4) on the four No. 2 connecting columns; The first spraying mechanism (3) and the second spraying mechanism (4) are respectively driven by the first toothed push block (9) and the second toothed push block (14) which operate in linkage to achieve linkage rotational motion.

2. A pesticide spreading drone with multiple spray heads according to claim 1, characterized in that: The outer wall of the upper body (1) is provided with four wings (2) for take-off drive, and the upper end front and rear ends and both sides of the lower end face of the lower body (5) are provided with slide grooves (6), and the four No. 1 spraying mechanisms (3) are slidably arranged in groups of two in the two slide grooves (6) located at the upper ends of the four slide grooves (6), and the four No. 2 spraying mechanisms (4) are slidably arranged in groups of two in the two slide grooves (6) located at the lower ends of the four slide grooves (6).

3. The pesticide spreading drone with multiple spray heads according to claim 1, characterized in that: The upper machine body (1) comprises an outer shell and a material storage box embedded in the inner part of the outer shell, wherein a pump body and a guide pipe are also arranged at the inner bottom end of the outer shell, one end of the guide pipe is connected to the pump body and a plurality of interfaces are arranged on the guide pipe, a liquid inlet pipe (308) is fixedly arranged on the lower end surface of the connecting plate (307) and one side of the outer wall of the second spraying mechanism (4), the liquid inlet pipe (308) located at the lower end of the connecting plate (307) passes through the inner part of the spraying main body plate (301), and a plurality of the liquid inlet pipes (308) are respectively connected to a plurality of interfaces.

4. A pesticide spreading drone with multiple spray heads according to claim 3, characterized in that: A plurality of atomizing nozzles are fixedly disposed on the lower end surface of the spraying main body plate (301) and the lower end surface of the second spraying mechanism (4), and the atomizing nozzles are connected to the liquid inlet pipe (308).

5. The pesticide spreading drone with multiple spray heads according to claim 1, characterized in that: Two of the four No. 1 gears (8) located at the rear end are respectively meshed with the teeth on both sides of the outer wall of the No. 1 toothed push block (9); two of the four No. 1 gears (8) located in the same longitudinal direction are meshed with each other; the worm (11) is meshed with the worm wheel (10); the lower end of the No. 1 toothed push block (9) and the upper end of the No. 2 toothed push block (14) are both provided with guide blocks for limiting their rotation; and the two guide blocks are respectively located on the upper end surface and the lower end surface of the base (12) for sliding.

6. The pesticide spreading drone with multiple spray heads according to claim 1, characterized in that: Two of the four second gears (15) located in the same transverse direction mesh with each other, and two of the four second gears (15) located in the longitudinal direction close to the second toothed push block (14) mesh with the teeth on the front and rear sides of the outer wall of the second toothed push block (14) respectively.

7. The pesticide spreading drone with multiple spray heads according to claim 3, characterized in that: A connecting pipe (3010) is installed on the side of the lower end of the auxiliary spray plate (303) close to the rotating block (302), and the connecting pipe (3010) is connected to the liquid inlet pipe (308). A plurality of atomizing nozzles are installed on the lower end surface of the auxiliary spray plate (303), and the atomizing nozzles are connected to the connecting pipe (3010).

8. The pesticide spreading drone with multiple spray heads according to claim 1, characterized in that: A connecting shaft is fixedly arranged at the midpoint of the driving gear (304), and a second micro motor is fixedly arranged at one end of the connecting shaft. The driving gear (304) is meshed with the linkage gear (306).

Images