Spray gun device with rotatable nozzle

Abstract

The utility model discloses a spray gun device with a rotatable nozzle, and aims to solve the problems that a traditional spray gun is difficult to spray an inner cavity in a narrow space, the spraying effect is poor, and the structure of the spray gun is complex. The spray gun device comprises a spray gun body, a hollow motor and a nozzle. The hollow motor comprises a stator, a hollow rotor and a motor shell, the stator sleeves the hollow rotor, the stator is fixed in the motor shell, and the hollow rotor is rotatably connected with the motor shell; the tail end of the spray gun body is connected with the motor shell, the nozzle penetrates through the hollow rotor, the nozzle is connected with the hollow rotor, and the nozzle is rotationally connected with the spray gun body. The nozzle is driven by the hollow rotor to rotate, so that the direction of the spray gun is flexibly adjusted in the spraying process, paint can be more uniformly distributed during spraying, spraying dead angles are reduced, and the beneficial effects of improving the spraying quality and widening the application range of the spray gun are achieved.

Description

Technical Field

[0001] This utility model relates to the field of spraying technology, and in particular to a spray gun device with a rotatable nozzle. Background Technology

[0002] Currently, painting robots are increasingly widely used, and are quite common in hardware, furniture, sanitary ware, and construction machinery industries. Some workpieces require painting of their internal cavities, such as electrical control cabinets and furniture cabinets, whose internal surfaces also need painting. Generally, there are four inner surfaces (top, bottom, left, and right) inside the cavity, plus the front, making a total of five inner surfaces that need painting. This application scenario requires the spray gun to be able to extend into the cavity, and the spray gun nozzle to be able to point towards the four inner surfaces. Painting some construction machinery workpieces is even more complex, requiring the treatment of more corners.

[0003] Currently, most robots used in the painting industry are general six-joint industrial robots. A few high-end applications utilize painting robots with hollow wrists. In most cases, the spray gun nozzle is designed at a certain angle to better adapt to painting the inner surfaces. When using a common six-joint industrial robot to paint the inside of a cavity, the spray gun needs to be pointed at each inner surface (ideally perpendicular) while being held by the robot. This results in a relatively large range of motion for the robot and a higher risk of encountering singularities. Using a hollow wrist-type painting robot generally increases the robot's cost significantly.

[0004] Furthermore, if the internal cavity is relatively small, the spatial constraints make it almost impossible for a robot to extend into the cavity, let alone point vertically inward. In such cases, existing robots cannot complete the task, and the painting operation still relies mainly on manual labor.

[0005] Some spray guns are designed to be quite complex, with an internal power mechanism that allows the nozzle to rotate around the gun's axis. Similar products exist overseas, but their cost is extremely high, sometimes even exceeding the cost of the robot itself. Utility Model Content

[0006] The purpose of this invention is to provide a spray gun device with a rotatable nozzle, which aims to solve the problems of traditional spray guns, such as difficulty in spraying the internal cavity of a narrow space, poor spraying effect, and complex structure.

[0007] To solve the above problems, this utility model provides a spray gun device with a rotatable nozzle, the spray gun device including a spray gun body, a hollow motor and a nozzle;

[0008] The hollow motor includes a stator, a hollow rotor, and a motor housing. The stator is sleeved on the hollow rotor and fixed inside the motor housing. The hollow rotor is rotatably connected to the motor housing.

[0009] The end of the spray gun body is connected to the motor housing, the nozzle passes through the hollow rotor, the nozzle is connected to the hollow rotor, and the nozzle is rotatably connected to the spray gun body.

[0010] Preferably, the spray gun device further includes a first connecting part, one end of which is fixedly connected to the motor housing, and the other end of which is connected to the end of the spray gun body.

[0011] Preferably, the spray gun body includes a spray gun housing and a spray pipe, the spray pipe is disposed inside the spray gun housing, and a connecting pipe is provided at the end of the spray pipe, the connecting pipe being connected to the nozzle.

[0012] Preferably, the spray gun body further includes a baffle portion, which is sleeved at the connection between the nozzle and the connecting pipe, and the first connecting portion is sleeved on the baffle portion.

[0013] Preferably, the spray gun body further includes a guide portion, which is disposed on the side of the partition portion near the hollow motor, and one end of the guide portion is connected to the end of the partition portion.

[0014] Preferably, the diameter of the connecting pipe is smaller than the diameter of the spray pipe, the diameter of the connecting pipe is smaller than the diameter of the nozzle, the nozzle is sleeved on the end of the connecting pipe, and a bearing is provided between the nozzle and the connecting pipe.

[0015] Preferably, the spray gun body is detachably connected to the first connecting part.

[0016] Preferably, the first connecting part is detachably connected to the motor housing.

[0017] Preferably, the spray gun device further includes a second connecting part, which is sleeved on the nozzle, and the hollow rotor is sleeved on the second connecting part.

[0018] Preferably, the end of the second connecting part is formed with a tension hole, and a tension bolt is provided in the tension hole, and the second connecting part is tensionedly connected to the hollow rotor.

[0019] This invention utilizes a hollow motor at the end of the spray gun. The hollow rotor drives the nozzle to rotate, allowing for flexible adjustment of the spray gun's direction during the spraying process. This results in more even paint distribution, reduced dead zones, improved spraying quality, and a wider range of spray gun applications. By adding only a simple hollow motor and rotating the nozzle, the spray gun's overall freedom of movement is increased. This allows the spray gun to be inserted into the cavity without significant movement, achieving full coverage of the cavity's inner surfaces. Furthermore, the spray gun body and connecting devices are largely uninvolved in complex posture-related movements. The small size of the hollow motor significantly reduces the probability of singularities and interference. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a spray gun device with a rotatable nozzle according to the present invention.

[0021] Figure 2 This is an exploded view of the spray gun device.

[0022] Figure 3 yes Figure 1 A cross-sectional schematic diagram of CC;

[0023] Figure 4 This is a schematic diagram of the main structure of the spray gun in the spray gun device.

[0024] Figure label:

[0025] 1. Spray gun body; 1a. First thread; 11. Spray gun housing; 12. Spray pipe; 121. Connecting pipe; 13. Partition; 14. Guide part;

[0026] 2. Hollow motor; 21. Stator; 22. Hollow rotor; 23. Motor housing; 23a. Second mounting hole;

[0027] 3. Nozzle;

[0028] 4. First connecting part; 4a. Second thread; 4b. First mounting hole;

[0029] 5. Second connecting part; 5a. Tensioning hole; 51. Tensioning bolt. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0031] The accompanying drawings show schematic diagrams of layer structures according to embodiments of the present invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0032] In the description of this utility model, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] Combination Figures 1 to 4 This utility model provides a spray gun device with a rotatable nozzle, including a spray gun body 1, a hollow motor 2, and a nozzle 3. The hollow motor 2 includes a stator 21, a hollow rotor 22, and a motor housing 23. The stator 21 is sleeved on the hollow rotor 22 and fixed inside the motor housing 23. The hollow rotor 22 is rotatably connected to the motor housing 23. The end of the spray gun body 1 is connected to the motor housing 23. The nozzle 3 passes through the hollow rotor 22 and is connected to the hollow rotor 22. The nozzle 3 is also rotatably connected to the spray gun body 1. Specifically, the spray gun body 1 serves as the basic support structure of the spray gun device, supporting other components and acting as a channel for the transmission of sprayed media such as paint. The hollow motor 2 provides a magnetic field through the stator 21, causing the hollow rotor 22 to rotate under the influence of the magnetic field. The motor housing 23 protects and fixes the stator 21 while providing rotational support for the hollow rotor 22. The nozzle 3 is the outlet for the sprayed media such as paint, and it rotates under the drive of the hollow rotor 22 after being connected to it. With this setup, the simple hollow motor 2 enables the nozzle 3 to rotate, allowing for flexible adjustment of the spray gun's direction during the spraying process. This results in more even paint distribution, reduced dead zones, improved spraying quality, and a wider range of spray gun applications. By simply adding a hollow motor 2 and rotating the nozzle 3, the spray gun's overall freedom is increased. This allows the spray gun to be inserted into the cavity without significant movement during spraying, achieving full coverage of the cavity's inner surfaces. Furthermore, the spray gun body 1 and the connecting devices are largely uninvolved in complex posture-related movements. Additionally, the hollow motor 2 itself is very small, significantly reducing the probability of singularities and interference.

[0034] It should be noted that the specific structure of the hollow motor 2 is not limited here. It only needs to provide the power to rotate the spray gun nozzle or measure the rotation angle, and its size and weight should not be excessive. Examples include hollow shaft motors, disc motors, or coreless motors. The specific type of spray gun is also not limited; it can be used on a painting robot or manually held. In a preferred embodiment, the hollow motor 2 is located at the end of the spray gun body 1, and the end of the spray gun body 1 is rotatably connected to the inlet end of the nozzle 3. The connection part is located on the side of the hollow motor 2 closest to the spray gun body 1, and the connection does not extend into the hollow motor 2. This arrangement ensures that the nozzle 3 passes entirely through the hollow motor 2, increasing the length of the nozzle 3 within the hollow rotor 22, resulting in better rotation of the nozzle 3 by the hollow rotor 22. Furthermore, placing the connection between the nozzle 3 and the spray gun body 1 on the outside of the hollow motor 2 facilitates cleaning and maintenance of the connection, prevents leakage of spray material that could contaminate the hollow motor 2, and extends the service life and operational stability of the entire spray gun device. The specific method by which the hollow rotor 22 and the motor housing 23 are rotatably connected is not limited here. It can be achieved through bearings or by installing a rotating bushing on the outside of the hollow rotor 22. The specific structure of the hollow rotor 22 is also not limited, as long as it can rotate relative to the stator 21 and the motor housing 23. In a preferred embodiment, an output flange is formed on the side of the hollow rotor 22 near the nozzle 3. A first bearing is provided between the output flange and the motor housing 23, and a second bearing is provided at the end of the hollow rotor 22 near the spray gun body 1. The first and second bearings enable the hollow rotor 22 to rotate smoothly relative to the motor housing 23.

[0035] In a preferred embodiment, the spray gun assembly further includes a first connecting part 4. One end of the first connecting part 4 is fixedly connected to the motor housing 23, and the other end is connected to the end of the spray gun body 1. Specifically, one end of the first connecting part 4 is fixed to the motor housing 23, and the other end is connected to the end of the spray gun body 1, connecting the motor part and the spray gun body 1 so that they work together to complete the spraying task during operation. This arrangement enhances the stability of the connection between the spray gun body 1 and the hollow motor 2, preventing the connection between the motor and the spray gun body 1 from loosening due to vibration or other factors during spray gun operation, thus affecting the normal use of the spray gun and the spraying effect.

[0036] It should be noted that the specific structural form of the spray gun body 1 is not limited here, nor is the specific connection method between the spray gun body 1 and the nozzle 3. The goal is to achieve spraying by allowing the coating material to reach the nozzle 3 through the spray gun body 1. In a preferred embodiment, the spray gun body 1 includes a spray gun housing 11 and a spray pipe 12. The spray pipe 12 is disposed within the spray gun housing 11, and a connecting pipe 121 is provided at the end of the spray pipe 12, connecting to the nozzle 3. By providing a connecting pipe 121 at the end of the spray pipe 12 within the spray gun body 1, and connecting the spray pipe 12 to the nozzle 3 through the connecting pipe 121, the coating material can be smoothly delivered from the spray pipe 12 to the nozzle 3. The spray gun housing 11 protects the internal components from external physical damage and contamination, extending the service life of the spray gun. The arrangement of the spray pipe 12 and the connecting pipe 121 ensures smooth coating material delivery, providing a guarantee for stable spraying operations. The specific connection method between the connecting pipe 121 and the nozzle 12 is limited here. The connecting pipe 121 can be integrally formed at the end of the nozzle 12, or the connecting pipe 121 and the end of the nozzle 12 can be detachably connected, such as by snap-fit ​​or screw connection. Furthermore, the nozzle 3 and the connecting pipe 121 can be rotatably connected. With this configuration, when the hollow rotor 22 drives the nozzle 3 to rotate, the paint enters the nozzle 3 along the nozzle 12 and the connecting pipe 121, and finally the nozzle 3 can point in multiple directions to complete the spraying.

[0037] In a preferred embodiment, the spray gun body 1 further includes a baffle 13, which is fitted onto the connection between the nozzle 3 and the connecting pipe 121, with the first connecting part 4 fitted onto the baffle 13. Fitting the baffle 13 onto the connection between the nozzle 3 and the connecting pipe 121 serves to prevent paint leakage and also provides some protection and positioning for the connection. Specifically, during paint transfer, the baffle 13 prevents paint from overflowing from the connection between the nozzle 3 and the connecting pipe 121 and assists in positioning during installation to ensure accurate connection. Preferably, the spray gun body 1 also includes a guide 14, which is located on the side of the baffle 13 near the hollow motor 2, with one end of the guide 14 connected to the end of the baffle 13. By positioning the guide portion 14 on the side of the partition portion 13 near the hollow motor 2, the rotation of the nozzle 3 is guided, ensuring the stability of the nozzle 3 during rotation. During nozzle 3 installation, the nozzle 3 and the connecting portion are detachably connected, with the diameters at the connection points being similar. Therefore, the guide portion 14 allows the nozzle 3 to connect smoothly to the connecting portion. By setting the partition portion 13, the internal structure of the spray gun is optimized, solving the problem of paint leakage and preventing paint leakage at the nozzle 3 and connecting portion positions from causing internal contamination of the spray gun body 1, thus extending the service life of the device. By setting the guide portion 14, the installation efficiency of the nozzle 3 is improved, as well as the stability and accuracy of the nozzle 3 during rotation, preventing the nozzle 3 from shaking or deviating during rotation, ensuring the uniformity and precision of the spraying. When the nozzle 3 rotates with the hollow rotor 22, the guide portion 14 restricts the radial movement of the nozzle 3, allowing it to rotate smoothly along the correct axis.

[0038] It should be noted that the specific connection method between the connecting pipe 121 and the nozzle 3 is not limited here, nor is the size relationship between the connecting pipe 121 and the nozzle 3 limited. The connecting pipe 121 can be sleeved on the nozzle 3, or the nozzle 3 can be sleeved on the connecting pipe 121, or the connecting pipe 121 and the nozzle 3 can be connected by other structural connections. In a preferred embodiment, the diameter of the connecting pipe 121 is smaller than the diameter of the spray pipe 12, and the diameter of the connecting pipe 121 is smaller than the diameter of the nozzle 3. The nozzle 3 is sleeved on the end of the connecting pipe 121, and a bearing is provided between the nozzle 3 and the connecting pipe 121. By setting the connecting pipe 121 to a smaller diameter, when the paint enters the connecting pipe 121 from the spray pipe 12, the paint contracts towards the axis of the spray pipe 12, preventing the paint from dispersing circumferentially around the spray pipe 12 and affecting the paint spraying effect. Simultaneously, the diameter of the nozzle 3 is larger than the diameter of the connecting pipe 121, ensuring that the paint completely enters the nozzle 3 along the connecting pipe 121. During the spraying process, the paint is smoothly pushed out of the nozzle 3 by the subsequent spraying pressure. The bearing enables a rotatable connection between the nozzle 3 and the connecting pipe 121, reducing friction between them and allowing the nozzle 3 to rotate more smoothly relative to the connecting pipe 121. This reduces the resistance during the rotation of the nozzle 3, decreases energy loss, extends the service life of both the nozzle 3 and the connecting pipe 121, and ensures the smoothness of the nozzle 3's rotation.

[0039] It should be noted that the nozzle 3 is detachably connected to the connecting pipe 121, allowing for the connection of nozzles 3 with different outlet diameters and models to the connecting pipe 121. Changing the nozzle 3 can meet the needs of different spraying scenarios and environments, making the spray gun device universal by replacing different nozzles 3. Furthermore, the specific connection method between the first connecting part 4 and the spray gun body 1 is not limited; it can be integrally formed, fixedly connected, or detachably connected. In the preferred embodiment, the first connecting part 4 is detachably connected to the spray gun body 1. The specific method of detachment is not limited here; it can be screwed or snap-fitted. Optionally, the end of the spray gun body 1 is provided with a first thread 1a, and the first connecting part 4 is provided with a second thread 4a near the inner side of the spray gun body 1. The spray gun body 1 and the first connecting part 4 are connected through the first thread 1a and the second thread 4a. This threaded connection method facilitates the installation and disassembly of the spray gun body 1 and the first connecting part 4, making it convenient for spray gun assembly, maintenance, and component replacement. It also provides a secure connection that can withstand the vibration and pressure during spray gun operation. The detachable first connecting part 4 allows for the replacement of both the hollow motor 2 and the nozzle 3 at the end of the spray gun. Different sizes, specifications, and functions of the hollow motor 2 and nozzle 3 can be used in different spraying scenarios, further improving the spraying environment of the spray gun device and facilitating its versatility. Furthermore, the first connecting part 4 is detachably connected to the motor housing 23. Optionally, the first connecting part 4 has a first mounting hole 4b, and the motor housing 23 has a second mounting hole 23a, which are connected by bolts. This connection method using mounting holes and bolts provides high connection strength, ensuring a stable connection between the first connecting part 4 and the motor housing 23, and facilitating installation and disassembly. The detachable connection between the first connecting part 4 and the motor housing 23 via the first mounting hole 4b, the second mounting hole 23a, and bolts improves the overall stability of the spray gun device and facilitates the installation, maintenance, and replacement of the hollow motor 2, thereby increasing work efficiency.

[0040] In a preferred embodiment, the spray gun device further includes a second connecting part 5, which is sleeved on the nozzle 3, and the hollow rotor 22 is sleeved on the second connecting part 5. The second connecting part 5, sleeved on the nozzle 3, assists in fixing the nozzle 3 and provides a connection base for the hollow rotor 22, preventing a direct rigid connection between the hollow rotor 22 and the nozzle 3, allowing the hollow rotor 22 to drive the nozzle 3 to rotate. During rotation, the nozzle 3 may encounter impacts from the workpiece being sprayed; the second connecting part 5 effectively prevents the impact force from being directly transmitted along the nozzle 3 to the hollow rotor 22, thus acting as a buffer and protecting the hollow rotor 22. This configuration optimizes the connection structure between the nozzle 3 and the hollow rotor 22, enabling the hollow motor 2 to operate efficiently and effectively, further improving the stability of the spray gun device.

[0041] The specific connection method between the second connecting part 5 and the hollow rotor 22 is not limited here. It can be directly fixed to the output end of the hollow rotor 22 by bolts, or it can be directly snapped into the interior of the hollow rotor 22. In a preferred embodiment, the end of the second connecting part 5 has a tension hole 5a, and a tension bolt 51 is provided in the tension hole 5a, so that the second connecting part 5 and the hollow rotor 22 are tensioned together. When installing the second connecting part 5, the tension bolt 51 is screwed into the tension hole 5a. As the bolt is tightened, the second connecting part 5 will undergo slight deformation, thereby tightly fitting with the hollow rotor 22 and achieving a tensioned connection. This tensioned connection method is firm and can effectively prevent relative sliding between the nozzle 3 and the hollow rotor 22, ensuring the synchronicity and stability of the nozzle 3's rotation, while also facilitating installation and disassembly.

[0042] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A spray gun device with a rotatable nozzle, characterized in that, The spray gun device includes a spray gun body (1), a hollow motor (2), and a nozzle (3); The hollow motor (2) includes a stator (21), a hollow rotor (22) and a motor housing (23). The stator (21) is sleeved on the hollow rotor (22) and fixed inside the motor housing (23). The hollow rotor (22) is rotatably connected to the motor housing (23). The end of the spray gun body (1) is connected to the motor housing (23), the nozzle (3) passes through the hollow rotor (22), the nozzle (3) is connected to the hollow rotor (22), and the nozzle (3) is rotatably connected to the spray gun body (1).

2. The spray gun device according to claim 1, characterized in that, The spray gun device also includes a first connecting part (4), one end of which is fixedly connected to the motor housing (23), and the other end of which is connected to the end of the spray gun body (1).

3. The spray gun device according to claim 2, characterized in that, The spray gun body (1) includes a spray gun housing (11) and a spray pipe (12). The spray pipe (12) is disposed inside the spray gun housing (11). The end of the spray pipe (12) is provided with a connecting pipe (121), and the connecting pipe (121) is connected to the nozzle (3).

4. The spray gun device according to claim 3, characterized in that, The spray gun body (1) also includes a baffle (13), which is sleeved at the connection between the nozzle (3) and the connecting pipe (121), and the first connecting part (4) is sleeved on the baffle (13).

5. The spray gun device according to claim 4, characterized in that, The spray gun body (1) also includes a guide part (14), which is disposed on the side of the partition part (13) near the hollow motor (2), and one end of the guide part (14) is connected to the end of the partition part (13).

6. The spray gun device according to claim 5, characterized in that, The diameter of the connecting pipe (121) is smaller than the diameter of the nozzle (12), and the diameter of the connecting pipe (121) is smaller than the diameter of the nozzle (3). The nozzle (3) is sleeved on the end of the connecting pipe (121), and a bearing is provided between the nozzle (3) and the connecting pipe (121).

7. The spray gun device according to claim 2, characterized in that, The spray gun body (1) is detachably connected to the first connecting part (4).

8. The spray gun device according to claim 7, characterized in that, The first connecting part (4) is detachably connected to the motor housing (23).

9. The spray gun device according to claim 1, characterized in that, The spray gun device also includes a second connecting part (5), which is sleeved on the nozzle (3), and the hollow rotor (22) is sleeved on the second connecting part (5).

10. The spray gun device according to claim 9, characterized in that, The end of the second connecting part (5) is formed with a tension hole (5a), and a tension bolt (51) is provided in the tension hole (5a). The second connecting part (5) is tensionedly connected to the hollow rotor (22).

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