An adjustable spray gun speed control mechanism

Abstract

This utility model relates to an adjustable spray gun speed-changing mechanism. The adjustable spray gun speed-changing mechanism includes a housing, a speed-changing mechanism inside the housing, and an impeller outside the housing. The impeller is connected to one end of an input shaft, which is rotatably mounted in the housing. An adjustment structure is provided on one side of the housing. The adjustment structure includes an adjustment component and a friction element. The friction element is used to contact the outer periphery of the input shaft, and the adjustment component is used to control the position of the friction element to change the frictional resistance between the friction element and the input shaft. By adjusting the component, the frictional resistance between the friction element and the input shaft can be changed, thereby changing the rotational speed of the input shaft, achieving the purpose of manually adjusting its output speed. This speed-regulating scheme has the advantages of simple structure, ease of implementation and operation, and low cost.

Description

Technical Field

[0001] This utility model relates to the field of spray gun technology, specifically to an adjustable spray gun speed change mechanism. Background Technology

[0002] Spray guns are a common piece of equipment in agricultural irrigation. For example, the utility model patent CN207126718U discloses a uniform-speed automatic rotating spray gun, which includes a pipe body and a rotating base. A nozzle is connected to the front end of the pipe body for remote spraying; the rotating base enables the spray gun to rotate. The rotating base is powered by a steering spray pipe, and the water flow from the steering spray pipe controls the speed of the spray gun's rotation; it lacks manual speed adjustment. The utility model patent CN218554430U discloses a rotating spray gun with a speed-changing structure. Although it can achieve speed changes, it relies on many gears, such as a transmission wheel, two intermediate rotating wheels, a speed-reducing driven wheel, a speed-increasing driven wheel, a driving wheel, and an output wheel, making its structure relatively complex. Utility Model Content

[0003] The purpose of this invention is to provide an adjustable spray gun speed control mechanism that achieves speed regulation through a relatively simple structure.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: An adjustable spray gun speed change mechanism includes a housing, a speed change mechanism inside the housing, an impeller outside the housing, and an input shaft connected to one end of the impeller. The input shaft is rotatably mounted in the housing. An adjustment structure is provided on one side of the housing. The adjustment structure includes an adjustment component and a friction element. The friction element is used to contact the outer peripheral side of the input shaft. The adjustment component is used to control the position of the friction element to change the frictional resistance between the friction element and the input shaft.

[0005] Furthermore, the input shaft is a worm gear, and the transmission mechanism adopts a planetary gear set, which includes a sun gear and planet gears. The sun gear is coaxially mounted with a worm gear, and the worm gear is in transmission cooperation with the worm gear.

[0006] Furthermore, the planet carrier containing the planetary gears is used for drive connection with the output shaft.

[0007] Furthermore, the planetary gears are provided in three parts.

[0008] Furthermore, the housing is provided with an internal gear ring, and each of the planetary gears meshes with the internal gear ring.

[0009] Furthermore, the adjusting assembly includes a screw and a spring, and an adjusting cylinder is provided on one side of the housing. The screw is threadedly assembled in the adjusting cylinder, and the spring is located between the inner end of the screw and the friction element.

[0010] Furthermore, one side of the friction element has an arc-shaped friction surface for engaging with the outer periphery of the input shaft, and the other side of the friction element has a protruding post for one end of the spring to be fitted onto.

[0011] Furthermore, a knob is provided at the outer end of the screw.

[0012] Furthermore, the screw is perpendicular to the input shaft.

[0013] The beneficial effects of this utility model are: During use, the frictional resistance between the friction component and the input shaft can be changed by adjusting the adjustment mechanism. A higher direct friction between the input shaft and the friction component results in a lower input shaft speed, and vice versa. This allows for manual adjustment of the output speed, ultimately changing the overall directional speed of the spray gun. This speed control method is simple in structure, easy to implement and operate, and low in cost. Attached Figure Description

[0014] Figure 1 This is an external view of the adjustable spray gun speed change mechanism of this utility model; Figure 2 This is an internal structural diagram of the adjustable spray gun speed change mechanism of this utility model; Figure 3 This is a schematic diagram of the planetary gears and planet carrier working together; Figure 4 This is a structural schematic diagram of one type of adjustment component; Figure 5 This is a schematic diagram of the Torx handle screw in another type of adjustment component.

[0015] 11. Second housing; 12. First housing; 121. Cylindrical cavity; 122. Adjusting cylinder; 2. Impeller; 3. Input shaft; 41. Worm gear; 42. Sun gear shaft; 43. Sun gear; 44. Planet gear; 45. Planet carrier; 451. Connecting shaft; 5. Adjusting assembly; 51. Friction component; 511. Arc-shaped friction surface; 512. Guide groove; 513. Protrusion; 52. Spring; 53. Screw; 54. Knob; 6. Torx handle screw. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art are within the protection scope of the present utility model.

[0017] Embodiments of this utility model: like Figures 1-4As shown, the adjustable spray gun speed change mechanism includes a housing, inside which a speed change mechanism is installed, and outside the housing, an impeller 2 is installed. The impeller 2 is connected to one end of an input shaft 3, which is rotatably mounted in the housing. The input shaft 3 is a worm gear. The impeller 2 is used in conjunction with a directional water spray pipe on the spray gun (not shown). The water flow from the directional water spray pipe impacts the impeller 2, causing it to rotate.

[0018] The housing mainly consists of two parts, which are fastened together by screws and referred to as the first housing 12 and the second housing 11, respectively. The first housing 12 has a circular cavity and a cylindrical cavity 121, and the input shaft 3 is rotatably assembled in the cylindrical cavity 121 of the first housing 12.

[0019] The transmission mechanism adopts a planetary gear set, which is mainly located in the circular cavity of the first housing 12. The planetary gear set includes a sun gear 43 and planet gears 44 surrounding the sun gear 43. The sun gear 43 is coaxially equipped with a worm gear 41, which is engaged with the worm gear transmission.

[0020] The planet carrier 45, on which the planet gears 44 are housed, is used for transmission connection with the output shaft (not shown). There are three planet gears 44, spaced apart along the circumference. The connecting shaft 451 of the planet carrier 45, used to connect to the output shaft, is coaxial with the sun gear shaft 42 and is perpendicular to the input shaft 3.

[0021] The first housing 12 is provided with an internal gear ring, and each of the planetary gears 44 meshes with the internal gear ring; the internal gear ring can be integrally set with the first housing 12, or the internal gear ring can be machined separately and then fixed with the first housing 12.

[0022] An adjustment structure is provided on one side of the housing. The adjustment structure includes an adjustment component 5 and a friction element 51. The friction element 51 is used to contact the outer peripheral side of the input shaft 3. The adjustment component 5 is used to control the position of the friction element 51 to change the frictional resistance between the friction element 51 and the input shaft 3.

[0023] Adjustment assembly 5 includes a screw 53 and a spring 52. An adjustment cylinder 122 is provided on one side of the first housing 12. The screw 53 is threaded into the adjustment cylinder 122. A knob 54 is provided at the outer end of the screw 53 for easy manual adjustment from the outside. The knob 54 can be... Figure 4 The outer periphery with friction texture shown can also be a hexagonal prism or a Torx-shaped design in other embodiments, which can be achieved by directly using Torx handle screw 6 (equivalent to screw + knob 54), such as... Figure 5 As shown. The screw 53 is perpendicular to the input shaft 3.

[0024] Friction component 51 has an arc-shaped friction surface 511 on one side for mating with the outer circumference of input shaft 3. Friction component 51 can be made of rubber block. For ease of assembly, friction component 51 is a cylindrical part with an arc-shaped groove machined at one end to form the arc-shaped friction surface 511; a guide groove 512 is opened on the lower side of the cylindrical part to guide and engage with the anti-rotation post in the adjusting cylinder 122 to prevent the friction component 51 from rotating; the friction component 51 can move linearly within a certain range under the drive of the screw. Since the adjustment stroke of friction component 51 is not large, the guide groove 512 on the cylindrical part can meet the anti-rotation requirements. The anti-rotation post can be formed by a screw screwed radially into the adjusting cylinder 122, and the adjusting cylinder 122 has a corresponding threaded hole. This method of limiting and preventing rotation is relatively easy to implement. In other embodiments, the friction component may not have an arc-shaped groove, but instead use a flat surface to contact the outer circumference of the input shaft. Since the surface of the friction component has a certain elasticity, a certain friction force can also be generated by applying axial force.

[0025] A protrusion 513 is provided on the other side of the friction element 51 for one end of the spring 52 to be fitted. The spring 52 is located between the inner end of the screw 53 and the friction element 51. In use, the compression of the spring 52 can be adjusted by turning the screw 53, thereby changing the frictional resistance between the friction element 51 and the input shaft 3. If the direct friction between the input shaft 3 and the friction element 51 is large, the rotational speed of the input shaft 3 will be lower, and vice versa. This allows for manual adjustment of the output speed, ultimately changing the overall directional speed of the spray gun.

Claims

1. An adjustable spray gun speed-changing mechanism, comprising a housing, a speed-changing mechanism disposed within the housing, an impeller disposed outside the housing, the impeller being connected to one end of an input shaft, the input shaft being rotatably mounted within the housing, characterized in that: An adjustment structure is provided on one side of the housing. The adjustment structure includes an adjustment component and a friction element. The friction element is used to contact the outer peripheral side of the input shaft, and the adjustment component is used to control the position of the friction element to change the frictional resistance between the friction element and the input shaft.

2. The adjustable lance speed variator of claim 1, wherein: The input shaft is a worm gear, and the speed change mechanism adopts a planetary gear set, which includes a sun gear and planet gears. The sun gear is coaxially mounted with a worm gear, and the worm gear is driven by the worm gear.

3. The adjustable lance speed variator of claim 2, wherein: The planet carrier containing the planetary gears is used for drive connection with the output shaft.

4. The adjustable lance speed variator of claim 3, wherein: The planetary gears are three in number.

5. The adjustable lance speed variator of claim 2, wherein: The housing is provided with an internal gear ring, and each of the planetary gears meshes with the internal gear ring.

6. The adjustable lance speed variator of claim 1, wherein: The adjustment assembly includes a screw and a spring. An adjustment cylinder is provided on one side of the housing. The screw is threadedly assembled in the adjustment cylinder, and the spring is located between the inner end of the screw and the friction element.

7. The adjustable lance speed variator of claim 6, wherein: One side of the friction element has an arc-shaped friction surface for engaging with the outer periphery of the input shaft, and the other side of the friction element has a protruding post for one end of the spring to be fitted.

8. The adjustable spray gun speed change mechanism according to claim 6, characterized in that: A knob is provided at the outer end of the screw.

9. The adjustable lance speed variator of claim 6, wherein: The screw is perpendicular to the input shaft.

Images