Transmission mechanism with waterproof device and spray gun

Abstract

The transmission mechanism comprises a transmission case and a driving wheel arranged on a shaft head of the transmission case, a first blind hole is formed in the side, close to the transmission case, of a hub of the driving wheel, and the portion, close to the hub, of the transmission case is located in the first blind hole. A second blind hole communicated with the hole bottom of the first blind hole is formed in the hub, and the shaft head is inserted into the second blind hole and fixedly connected with the hub. Water flow sprayed by a steering water spraying pipe on the rotary spray gun is sprayed out to drive the rotary disc and the shaft head to rotate, and then the rotary spray gun is driven to rotate through a transmission element in the transmission box. Part of splashed water flow falls on the outer wall of the hub, then is thrown away from the outer wall of the hub in the falling process under the action of centrifugal force and gravity, and cannot enter the first blind hole, so that the water flow cannot enter the transmission box through a gap between the shaft head and a shell of the transmission box; therefore, transmission elements in the transmission case are prevented from being damaged or shortened in service life due to water inflow.

Description

Technical Field

[0001] The utility model relates to the technical field of sprinkler irrigation equipment, in particular to a transmission mechanism and a spray gun with a waterproof device. Background Technique

[0002] A rotary spray gun is a commonly used equipment for sprinkler irrigation. This rotary spray gun sprays water from a steering water pipe onto a driving wheel on the spray gun to drive the driving wheel to rotate. Then, the driving wheel drives the rotary spray gun to rotate through a transmission box, thereby realizing rotary sprinkler irrigation.

[0003] In use, the driving wheel is located above the transmission box, so the shaft head of the transmission box is upward. A part of the water sprayed by the steering water pipe will fall on the shaft head, and then enter the transmission box through the gap between the shaft head and the shell of the transmission box, resulting in damage to the transmission elements (such as gears, worm gears, etc.) in the transmission box or reducing the service life of the transmission elements. Even if a sealing ring or other sealing parts are used to seal between the shaft head and the shell, since the shaft head is upward, the outer end of the corresponding sealing part is also upward, so water will accumulate at the position of the sealing part. Over time, it is easy to cause the sealing part to fail and water to enter the transmission box, and in severe cases, it will cause the transmission box to be scrapped, resulting in unnecessary losses. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a transmission mechanism with a waterproof device, which is used to solve the problem that the transmission box in the transmission mechanism of the current rotary spray gun is easily damaged due to water ingress.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A transmission mechanism with a waterproof device includes a transmission box and a driving wheel arranged on the shaft head of the transmission box. A first blind hole is arranged on one side of the hub of the driving wheel close to the transmission box. The part of the transmission box close to the hub is located in the first blind hole. A second blind hole communicating with the bottom of the first blind hole is arranged in the hub. The shaft head is inserted into the second blind hole and fixedly connected with the hub.

[0007] Furthermore, a sleeve is arranged at the part of the transmission box corresponding to the shaft head. The shaft head is rotatably connected through the sleeve. The sleeve is fixedly connected with the shell of the transmission box. One end of the sleeve close to the hub is located in the first blind hole.

[0008] Furthermore, a screw is threadedly connected to the hub at a position corresponding to the first blind hole. The screw is perpendicular to the axis of the shaft head. The inner end of the screw is located in a corresponding pit or hole on the shaft head.

[0009] Further, the driving wheel includes a circular turntable and a plurality of water receiving plates arranged along the circumferential direction of the turntable. The water receiving plates are fixedly connected to the turntable, the hub is fixedly arranged at the center of the turntable, and the water receiving plates are located outside the hub.

[0010] Further, the water receiving plates are all flat plates, and the water receiving plates are all perpendicular to the turntable.

[0011] Further, the water receiving plates are located on one side of the turntable close to and / or away from the transmission case.

[0012] Further, the part of the housing of the transmission case corresponding to the shaft head is a convex platform protruding outward, and the convex platform is located in the first blind hole.

[0013] A spray gun includes the above-mentioned transmission mechanism with a waterproof device.

[0014] The positive effects of the present utility model are as follows:

[0015] The transmission mechanism includes a transmission case and a driving wheel arranged on the shaft head of the transmission case. The hub of the driving wheel is provided with a first blind hole. The part of the transmission case corresponding to the shaft head is a convex platform located in the first blind hole. The hub is provided with a second blind hole at the bottom of the first blind hole. The shaft head is inserted into the second blind hole and fixedly connected to the hub. The water flow ejected from the steering water pipe on the rotary spray gun drives the turntable and the shaft head to rotate, and then drives the rotary spray gun to rotate through the transmission elements in the transmission case. Some splashed water will fall on the outer wall of the hub, and then be thrown away from the outer wall of the hub during the falling process under the action of centrifugal force and gravity, and will not enter the first blind hole, nor will it enter the interior of the transmission case through the gap between the shaft head and the housing of the transmission case, thereby preventing the transmission elements in the transmission case from being damaged or the service life from being reduced due to water ingress. The second blind hole is not communicated with the top surface of the driving wheel, so the water splashed on the top surface of the driving wheel will not flow downward through the gap between the shaft head and the hub and enter the interior of the transmission case. Description of the Drawings

[0016] Figure 1 is a perspective view of the present utility model;

[0017] Figure 2 is a usage diagram of the present utility model;

[0018] Figure 3 is a schematic diagram after the driving wheel is separated from the transmission case;

[0019] Figure 4 is a sectional view of the present utility model;

[0020] In the figure:

[0021] 1. Turntable; 2. Screw; 3. Water receiving plate; 4. Hub; 5. Transmission box; 6. Axle head; 7. Sleeve; 8. Set screw; 9. Housing; 10. Steering spray pipe; 11. First blind hole; 12. Second blind hole. Detailed implementation manner

[0022] Embodiment 1

[0023] As Figures 1 to 4 shown, a transmission mechanism with a waterproof device includes a transmission box 5 and a driving wheel arranged on the axle head 6 of the transmission box 5. The driving wheel is located at the top of the axle head 6, and a first blind hole 11 is provided at the center of the bottom of the hub 4 of the driving wheel. The transmission box 5 adopts a worm and worm gear mechanism for transmission, and the axle head 6 is located at the top end of the worm. The diameter of the end of the housing 9 of the transmission box 5 corresponding to the axle head 6 is smaller than the diameter of the first blind hole 11, and this end protrudes upward to form a boss located in the first blind hole 11. A second blind hole 12 communicating with the center of the bottom of the first blind hole 11 is provided in the hub 4. The hub 4, the first blind hole 11, and the second blind hole 12 are coaxial, and the axle head 6 is inserted into the second blind hole 12 and fixedly connected to the hub 4.

[0024] The driving wheel includes a circular turntable 1 and eight water receiving plates 3 arranged along the circumferential direction of the turntable 1. The water receiving plates 3 are all fixedly connected to the turntable 1. The hub 4 is fixedly arranged at the center of the turntable 1, and the water receiving plates 3 are located outside the hub 4. The water receiving plates 3 are all in a flat plate shape and are all perpendicular to the turntable 1. The water receiving plates 3 are located on the side of the turntable 1 close to the transmission box 5. The turntable 1, the hub 4, and the water receiving plates 3 are integrally cast, and there are no openings on the top surface of the turntable 1, so it is more durable.

[0025] The water flow sprayed by the steering spray pipe 10 on the rotary spray gun impacts the water receiving plate 3 after being sprayed, thereby driving the turntable 1 and the axle head 6 to rotate. Through the transmission of the worm and the worm gear, the rotary spray gun is driven to rotate. Part of the splashed water flow will fall on the outer wall of the hub 4, and then be thrown off the outer wall of the hub 4 during the falling process under the action of centrifugal force and gravity, and will not enter the first blind hole 11, nor will it enter the interior of the transmission box 5 through the gap between the axle head 6 and the housing 9, thereby preventing the transmission elements (such as worm and worm gear) in the transmission box 5 from being damaged or having a reduced service life due to water ingress.

[0026] Since the second blind hole 12 does not communicate with the top surface of the turntable 1, the water splashed on the top surface of the turntable 1 will not flow downward through the gap between the axle head 6 and the hub 4 and enter the interior of the transmission box 5.

[0027] Embodiment 2

[0028] The difference between this embodiment and Embodiment 1 is:

[0029] A sleeve 7 is provided at a position of the transmission case 5 corresponding to the shaft head 6. The shaft head 6 is rotatably connected through the sleeve 7. The sleeve 7 and the housing 9 are fixedly connected by a set screw 8 screwed onto the housing 9. The upper end of the sleeve 7 protrudes above the housing 9, and the upper end of the sleeve 7 is located in the first blind hole 11.

[0030] The sleeve 7 is made of brass, and the surface of the shaft head 6 that mates with the sleeve 7 is chrome-plated, thereby extending the service life of the transmission case 5.

[0031] Embodiment 3

[0032] The difference between this embodiment and Embodiment 1 is as follows:

[0033] A screw 2 is threadedly connected to the hub 4 at a position corresponding to the first blind hole 11. The screw 2 is perpendicular to the axis of the shaft head 6, and the inner end of the screw 2 is located in a hole correspondingly provided on the shaft head 6, thereby facilitating the connection between the shaft head 6 and the hub 4. To further prevent water from entering the hub 4 from the thread of the screw 2, sealant can be applied to the thread surface of the screw 2 during installation.

[0034] Embodiment 4

[0035] In this embodiment, the above-described transmission structure is applied to a spray gun, thereby extending the overall service life of the spray gun.

[0036] The above-described embodiments are described in detail and specifically, expressing the preferred embodiments of the present invention. They are only used to illustrate the technical ideas and features of the present invention. The purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. However, it is not limited to the present invention only. The patent scope of the present invention cannot be limited only by this embodiment. That is, any equivalent changes or modifications made according to the spirit disclosed by the present invention, for those researchers or technicians in the field, within the structure of the present invention, local improvements within the system and changes and transformations between subsystems are still within the patent scope of the present invention.

Claims

1. A transmission mechanism with a waterproof device, comprising a transmission box (5) and a driving wheel arranged on a shaft head (6) of the transmission box (5), characterized in that: A first blind hole (11) is provided on a side of the hub (4) of the driving wheel close to the transmission case (5); a portion of the transmission case (5) close to the hub (4) is located in the first blind hole (11); a second blind hole (12) is provided in the hub (4) and is connected to the bottom of the first blind hole (11); the shaft head (6) is inserted into the second blind hole (12) and is fixedly connected to the hub (4).

2. A transmission mechanism with a waterproof device according to claim 1, characterized in that: A sleeve (7) is provided at a position corresponding to the transmission box (5) and the shaft head (6); the shaft head (6) and the sleeve (7) are rotatably connected through the sleeve (7); the sleeve (7) is fixedly connected to a housing (9) of the transmission box (5); and one end of the sleeve (7) close to the wheel hub (4) is located in a first blind hole (11).

3. The transmission mechanism with a waterproof device according to claim 1, characterized in that: The wheel hub (4) is threadedly connected with a screw (2) at a position corresponding to the first blind hole (11); the screw (2) is perpendicular to the axis of the shaft head (6); and the inner end of the screw (2) is located in a corresponding pit or hole on the shaft head (6).

4. The transmission mechanism with a waterproof device according to claim 1, characterized in that: The driving wheel comprises a circular turntable (1) and a plurality of water receiving plates (3) arranged along the circumferential direction of the turntable (1), the water receiving plates (3) are all fixedly connected to the turntable (1), the wheel hub (4) is fixedly arranged at the center of the turntable (1), and the water receiving plates (3) are located outside the wheel hub (4).

5. The transmission mechanism with a waterproof device according to claim 4, characterized in that: The water receiving plates (3) are all in the shape of flat plates, and the water receiving plates (3) are all perpendicular to the rotating disk (1).

6. The transmission mechanism with a waterproof device according to claim 4, characterized in that: The water receiving plate (3) is located on a side of the rotating disk (1) close to the transmission box (5) and / or away from the transmission box (5).

7. The transmission mechanism with a waterproof device according to claim 1, characterized in that: The portion of the housing (9) of the transmission box (5) corresponding to the shaft head (6) is a boss protruding outwards, and the boss is located in the first blind hole (11).

8. A spray gun, characterized in that: A transmission mechanism with a waterproof device comprising any one of claims 1 to 7.

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