Air adjusting assembly and spray gun

Abstract

The utility model provides an air adjusting assembly and a spray gun, and belongs to the technical field of spray guns. The joint seat is arranged on the valve rod in a sleeving manner, and the valve rod is allowed to rotate relative to the joint seat; the valve rod is fixedly connected with the knob in the circumferential direction; the gas adjusting assembly has the advantages that the gas adjusting assembly is designed to be of a split structure, the rotary knob is connected with the tail end of the valve rod and can drive the valve rod to rotate, the valve rod is sleeved with the connector base, the valve rod can rotate relative to the connector base, and the connector base plays a role similar to a bearing; the connector base can reduce resistance borne by the valve rod when the valve rod rotates so as to prevent the air adjusting assembly from being stuck.

Description

Technical Field

[0001] The utility model belongs to the technical field of spray guns, and relates to an air regulating component and a spray gun. Background Art

[0002] A spray gun is a spraying tool used for spraying paint, varnish, coating or other liquid materials. It atomizes the liquid into fine particles through compressed air or pressure and evenly distributes them on the surface of the object to be coated, forming a smooth coating.

[0003] The air regulating component (air switch) is one of the key components of the spray gun, responsible for controlling and regulating the supply of high-pressure gas to ensure that the spray gun can provide stable and adjustable high-pressure gas during operation to meet different spraying requirements. In traditional designs, the air regulating component usually adopts an integrated structure, with a front end similar to a valve and a rear end similar to a knob.

[0004] However, when high-pressure gas flows through this component and enters the spray gun body, the air pressure may cause the contact between the air regulating component and the gun body to be too tight, resulting in an increased rotation feel or even jamming. Therefore, there is room for improvement. Summary of the Utility Model

[0005] The purpose of the present utility model is to propose an air regulating component and a spray gun for the above problems existing in the prior art.

[0006] The purpose of the present utility model can be achieved by the following technical solutions: An air regulating component, comprising:

[0007] A valve stem;

[0008] A joint seat, the joint seat is sleeved on the valve stem, and the valve stem is allowed to rotate relative to the joint seat;

[0009] A knob, the valve stem is circumferentially fixedly connected to the knob.

[0010] Preferably, the valve stem is provided with a valve cavity extending along its axial direction, the opening of the valve cavity is located at one end of the valve stem, and an air inlet is provided on the wall of the valve stem, and the air inlet is communicated with the valve cavity.

[0011] Preferably, a torque transmission end is provided at the other end of the valve stem, the knob is provided with a torque transmission hole, and the torque transmission end is connected to the torque transmission hole to circumferentially fixedly connect the knob to the valve stem.

[0012] Preferably, the valve stem is provided with a screw, the knob is provided with a threaded hole, and the screw is connected to the threaded hole to axially fixedly connect the knob to the valve stem.

[0013] Preferably, the valve stem is further provided with a perforation which communicates with the valve cavity and forms a stepped hole structure therewith. The head of the screw is located at the bottom of the valve cavity, and the rod of the screw passes through the perforation and is connected to the knob.

[0014] Preferably, one of the joint seat and the knob is provided with a limiting block and the other is provided with a limiting groove. The limiting groove has two limiting surfaces, and the limiting block is located in the limiting groove. The knob has two extreme position limits relative to the joint seat. When the knob is at the extreme position limit, the limiting block is in contact connection with the limiting surface to limit the rotation of the knob.

[0015] Preferably, sealing rings are provided between the joint seat and the valve stem and on the joint seat.

[0016] A spray gun includes the air regulating assembly as described above and further includes a gun body. The air regulating assembly is rotatably mounted on the gun body.

[0017] Preferably, the gun body is provided with an air inlet passage and an installation cavity. The installation cavity communicates with the air inlet passage. The valve stem of the air regulating assembly passes through the installation cavity. The communication area between the air inlet of the valve stem and the outlet of the air inlet passage determines the air inlet flow rate. The joint seat of the air regulating assembly is fixed to the installation cavity.

[0018] Preferably, the gun body is detachably connected with a locking rod. The locking rod is located in the installation cavity. The joint seat is provided with a locking groove. The locking rod is inserted into the locking groove to fixedly connect the joint seat with the gun body.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] 1. The air regulating assembly is designed as a split structure. The knob is connected to the tail end of the valve stem and can drive the valve stem to rotate. The joint seat is sleeved on the valve stem and the valve stem can rotate relative to the joint seat. The joint seat plays a role similar to that of a bearing. When high-pressure gas acts on the valve stem, the joint seat can reduce the resistance suffered by the valve stem during rotation to prevent the air regulating assembly from getting stuck.

[0021] 2. The perforation on the valve stem and the valve cavity form a stepped hole structure. The head of the screw is located at the bottom of the valve cavity, and the rod passes through the perforation and is connected to the knob, strengthening the connection between the knob and the valve stem.

[0022] 3. During actual assembly, first, the air regulating assembly is installed on the gun body. The joint seat is placed in the installation cavity, and then the locking rod is inserted from the outside and embedded in the locking groove, so that the joint seat is locked on the gun body, realizing the circumferential fixation and axial fixation of the joint seat in the installation cavity, which is very convenient during installation. Description of the Drawings

[0023] Figure 1 This is an axonometric view of the air regulating assembly of the present utility model.

[0024] Figure 2 This is an exploded view of the structure of the air regulating assembly of the present utility model.

[0025] Figure 3 This is a schematic diagram of the internal structure of the air regulating assembly of the present utility model.

[0026] Figure 4 This is a schematic diagram of the structure of the limit block and the limit groove of the present utility model.

[0027] Figure 5 This is a schematic diagram of the structure of the spray gun of the present utility model.

[0028] Figure 6 This is an exploded view of the structure of the air regulating assembly and the gun body of the present utility model.

[0029] In the figure, 100 is the valve stem; 110 is the valve cavity; 120 is the air inlet; 130 is the torque transmission end; 140 is the perforation; 200 is the joint seat; 210 is the limit block; 220 is the locking groove; 300 is the knob; 310 is the torque transmission hole; 320 is the threaded hole; 330 is the limit groove; 331 is the limit surface; 400 is the screw; 500 is the sealing ring; 600 is the gun body; 610 is the air inlet passage; 620 is the installation cavity. Detailed implementation manners

[0030] The following are specific embodiments of the present utility model and in combination with the attached drawings, the technical solutions of the present utility model will be further described, but the present utility model is not limited to these embodiments.

[0031] As Figure 1-6 shown, an air regulating assembly includes: a valve stem 100; a joint seat 200, the joint seat 200 is sleeved on the valve stem 100, and the valve stem 100 is allowed to rotate relative to the joint seat 200; a knob 300, the valve stem 100 is circumferentially fixedly connected to the knob 300.

[0032] The air regulating assembly adopts a split design to solve the problem that the traditional air regulating assembly of the spray gun is prone to jamming under the action of high-pressure gas. The joint seat 200 is sleeved on the valve stem 100, allowing the valve stem 100 to rotate inside it. In fact, in the structure, the joint seat 200 is located between the valve stem 100 and the installation cavity 620 of the gun body 600, playing a role similar to that of a bearing, which can reduce the contact area between the valve stem 100 and the gun body 600. The knob 300 is circumferentially fixedly connected to the tail end of the valve stem 100, and the user drives the valve stem 100 to rotate by rotating the knob 300, thereby adjusting the air intake.

[0033] In principle, the joint seat 200 allows the valve stem 100 to rotate freely inside it, reducing the rotational resistance caused by high-pressure gas to the valve stem 100, preventing the component from jamming, and making the rotation feel smoother.

[0034] Based on the above-described embodiment, the valve stem 100 is provided with a valve cavity 110 extending along its axial direction. The opening of the valve cavity 110 is located at one end of the valve stem 100, and an air inlet 120 is formed in the wall of the valve stem 100. The air inlet 120 communicates with the valve cavity 110.

[0035] As the core component of the air regulating assembly, the valve stem 100 has an axial valve cavity 110 for gas flow. An air inlet 120 is formed on the side wall of the valve stem 100, and this air inlet 120 communicates with the valve cavity 110. When the valve stem 100 rotates, the relative position between the air inlet 120 and the external gas source (the outlet of the air inlet passage 610) changes, thereby changing the gas flow rate. The gas enters the valve cavity 110 from the air inlet passage 610 through the air inlet 120, and then enters the air passage of the gun body 600 from the opening of the valve cavity 110.

[0036] As Figure 1-4 shown, based on the above-described embodiment, a torque transmission end 130 is provided at the other end of the valve stem 100, and a torque transmission hole 310 is provided on the knob 300. The torque transmission end 130 is connected to the torque transmission hole 310 so that the knob 300 is circumferentially fixedly connected to the valve stem 100.

[0037] The torque transmission end 130 is generally a polygonal structure, and the shape of the torque transmission hole 310 matches that of the torque transmission end 130 on the valve stem 100 to form a keyway fit. When the knob 300 and the valve stem 100 are assembled, the torque transmission hole 310 is sleeved on the torque transmission end 130 to ensure that the two are fixedly connected in the circumferential direction (i.e., the direction of rotation around the axis).

[0038] Based on the above-described embodiment, a screw 400 is provided on the valve stem 100, and a threaded hole 320 is provided on the knob 300. The screw 400 is connected to the threaded hole 320 so that the knob 300 is axially fixedly connected to the valve stem 100.

[0039] The cooperation between the screw 400 and the threaded hole 320 axially fixes the knob 300 to the valve stem 100, ensuring that the knob 300 will not loosen axially.

[0040] Preferably, the valve stem 100 is further provided with a through hole 140. The through hole 140 communicates with the valve cavity 110 and the two form a stepped hole structure. The head of the screw 400 is located at the bottom of the valve cavity 110, and the rod portion of the screw 400 passes through the through hole 140 and is connected to the knob 300.

[0041] The perforation 140 on the valve stem 100 and the valve cavity 110 form a stepped hole structure. The head of the screw 400 is located at the bottom of the valve cavity 110, and the rod part passes through the perforation 140 to be connected to the knob 300, strengthening the connection between the knob 300 and the valve stem 100.

[0042] Since this gas regulating assembly is designed as a split structure, it needs to be assembled. During actual assembly, first, the joint seat 200 is sleeved on the valve stem 100. Then, the torque transmission end 130 of the valve stem 100 is inserted into the torque transmission hole 310. Next, the screw 400 is inserted through the valve cavity 110 into the perforation 140. Then, the screw 400 is turned so that the screw 400 is connected to the threaded hole 320, thereby realizing the connection between the valve stem 100 and the knob 300.

[0043] On the basis of the above embodiment, one of the joint seat 200 and the knob 300 is provided with a limiting block 210 and the other is provided with a limiting groove 330. The limiting groove 330 has two limiting surfaces 331, and the limiting block 210 is located in the limiting groove 330. The knob 300 has two stroke limit positions relative to the joint seat 200. When the knob 300 is at the stroke limit position, the limiting block 210 is in contact connection with the limiting surface 331 to limit the rotation of the knob 300.

[0044] The limiting mechanism between the joint seat 200 and the knob 300 is mainly to ensure operation safety and prevent over-rotation. The knob 300 has two stroke limit positions relative to the joint seat 200, which means the rotation range of the knob 300 is limited between two specific angular positions. When the knob 300 rotates to one of the limit positions, the limiting block 210 will be in contact with one of the limiting surfaces 331 of the limiting groove 330, preventing the knob 300 from continuing to rotate in the same direction.

[0045] As Figure 1-3 shown, on the basis of the above embodiment, sealing rings 500 are provided both between the joint seat 200 and the valve stem 100 and on the joint seat 200. The design purpose of the sealing ring 500 is to prevent gas from leaking from the gap between the joint seat 200 and the valve stem 100 and the gap between the joint seat 200 and the gun body 600 in a high-pressure gas environment, ensuring the efficiency of gas flow and the working pressure of the system.

[0046] As Figure 1-6 shown, a spray gun includes a gas regulating assembly and further includes a gun body 600. The gas regulating assembly is rotatably installed on the gun body 600.

[0047] Based on the above embodiments, the gun body 600 is provided with an air inlet passage 610 and an installation cavity 620. The installation cavity 620 communicates with the air inlet passage 610. The valve stem 100 of the air regulating assembly passes through the installation cavity 620. The communication area between the air inlet 120 of the valve stem 100 and the outlet of the air inlet passage 610 determines the air intake flow rate. The joint seat 200 of the air regulating assembly is fixed in the installation cavity 620.

[0048] The air inlet passage 610 is provided in the handle part of the gun body 600 and is used to connect with an external air source. After the gas enters the air inlet passage 610, it enters the valve cavity 110 from the air inlet 120, and then enters the air passage of the gun body 600 from the outlet of the valve cavity 110. Among them, when the operator rotates the knob 300, the valve stem 100 circumferentially fixed to the knob 300 rotates accordingly, changing the communication area between the air inlet 120 and the outlet of the air inlet passage 610, thereby changing the air flow rate.

[0049] There is also an installation cavity 620 provided on the gun body 600. Its position and size are designed to accommodate the air regulating assembly, especially the valve stem 100 part. The installation cavity 620 communicates with the air inlet passage 610, forming a control node for gas flow. The joint seat 200 is fixed in the installation cavity 620 and serves as a support and guiding structure for the valve stem 100, allowing the valve stem 100 to rotate inside it, which can prevent the air regulating assembly from getting stuck in a high-pressure gas environment.

[0050] Based on the above embodiments, the gun body 600 is detachably connected with a locking rod. The locking rod is located in the installation cavity 620. The joint seat 200 is provided with a locking groove 220. The locking rod is inserted into the locking groove 220 to fixedly connect the joint seat 200 with the gun body 600.

[0051] In the design of the spray gun, the detachable connection between the gun body 600 and the air regulating assembly is achieved through the mechanism of the locking rod and the locking groove 220. During actual assembly, first, the air regulating assembly is installed on the gun body 600, the joint seat 200 is placed in the installation cavity 620, and then the locking rod is inserted from the outside and embedded in the locking groove 220. In this way, the joint seat 200 is locked on the gun body 600, realizing the circumferential and axial fixation of the joint seat 200 in the installation cavity 620, which is very convenient during installation.

[0052] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the drawings). If this specific posture changes, the directional indications will also change accordingly.

[0053] In addition, in the present utility model, descriptions such as "first", "second", "one", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0054] In the present utility model, unless otherwise clearly specified and defined, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0055] In addition, the technical solutions between various embodiments of the present utility model can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

Claims

1. An air regulating component, characterized in that, Comprising: A valve stem (100); A joint seat (200), the joint seat (200) is sleeved on the valve stem (100), and the valve stem (100) is allowed to rotate relative to the joint seat (200); A knob (300), the valve stem (100) is circumferentially fixedly connected to the knob (300).

2. The air regulating component according to claim 1, characterized in that: The valve stem (100) is provided with a valve cavity (110) extending along its axial direction, the opening of the valve cavity (110) is located at one end of the valve stem (100), and an air inlet (120) is provided on the wall of the valve stem (100), and the air inlet (120) is communicated with the valve cavity (110).

3. The air regulating assembly according to claim 2, characterized in that: The other end of the valve stem (100) is provided with a torque transmission end (130), the knob (300) is provided with a torque transmission hole (310), and the torque transmission end (130) is connected to the torque transmission hole (310) to circumferentially fixedly connect the knob (300) to the valve stem (100).

4. The air regulating component according to claim 2, wherein: The valve stem (100) is provided with a screw (400), the knob (300) is provided with a threaded hole (320), and the screw (400) is connected to the threaded hole (320) to axially fixedly connect the knob (300) to the valve stem (100).

5. The air regulating component according to claim 4, characterized in that: The valve stem (100) is further provided with a through hole (140), the through hole (140) is communicated with the valve cavity (110) and the two form a stepped hole structure, the head of the screw (400) is located at the bottom of the valve cavity (110), and the rod portion of the screw (400) passes through the through hole (140) to be connected to the knob (300).

6. The air regulating assembly according to claim 1, wherein: One of the joint seat (200) and the knob (300) is provided with a limiting block (210) and the other is provided with a limiting groove (330), the limiting groove (330) has two limiting surfaces (331), and the limiting block (210) is located in the limiting groove (330); the knob (300) has two stroke limit positions relative to the joint seat (200), and when the knob (300) is located at the stroke limit position, the limiting block (210) is in abutting connection with the limiting surface (331) to limit the rotation of the knob (300).

7. The air regulating component according to claim 1, characterized in that: Sealing rings (500) are provided between the joint seat (200) and the valve stem (100) and on the joint seat (200).

8. A spray gun, characterized in that, Comprising the air regulating assembly according to any one of claims 1-7, further comprising a gun body (600), and the air regulating assembly is rotatably installed on the gun body (600).

9. The spray gun according to claim 8, characterized in that: The gun body (600) is provided with an air inlet passage (610) and an installation cavity (620), the installation cavity (620) is communicated with the air inlet passage (610), the valve stem (100) of the air regulating assembly passes through the installation cavity (620), and the communication area between the air inlet (120) of the valve stem (100) and the outlet of the air inlet passage (610) determines the air inlet flow rate, and the joint seat (200) of the air regulating assembly is fixed to the installation cavity (620).

10. The spray gun according to claim 9, characterized in that: The gun body (600) is detachably connected with a locking rod, the locking rod is located in the installation cavity (620), the joint seat (200) is provided with a locking groove (220), and the locking rod is embedded into the locking groove (220) so that the joint seat (200) is fixedly connected with the gun body (600).

Images