Spray gun for airless sprayer

Abstract

The utility model belongs to the field of spray guns, and particularly relates to a spray gun for an airless sprayer, which comprises a spray gun main body, a connecting piece, a spray rod and a spray head, and the spray gun main body is fixedly connected with the connecting piece; a connecting mechanism is arranged between the connecting piece and the spraying rod, the connecting mechanism comprises four sets of sliding blocks, the sliding blocks are fixedly connected to the inner wall of the left side of the spraying rod, the sliding blocks are slidably connected into sliding grooves, the sliding grooves are formed in the connecting piece, inserting blocks are inserted into the sliding blocks, and the inserting blocks are fixedly connected to sliding rings; the left side of the sliding ring is fixedly connected with a plurality of sets of inserting columns and first springs, the left sides of the inserting columns are inserted into a fixing ring, the fixing ring is fixedly connected to a connecting piece, the left sides of the inserting columns abut against ejector blocks, the ejector blocks are fixedly connected to a connecting sleeve, and the connecting sleeve is in threaded connection with the connecting piece. And through the structural design of the connecting mechanism, the function of conveniently connecting the connecting piece and the spraying rod together is achieved.

Description

Technical Field

[0001] The utility model relates to the field of spray guns, in particular to a spray gun for an airless spraying machine. Background Technique

[0002] An airless spraying machine is a device used for transporting paint, and generates high pressure during the transportation process. The paint can be ejected from the nozzle of the spray gun through a pipeline connected to the spray gun, and can provide a uniform and consistent fan-shaped pattern, and the spraying quality is better. The airless spraying machine is generally connected to the spray gun through a hose.

[0003] According to the patent document: A sealing connection structure between a spray gun and an extension rod in a high-pressure airless spraying machine proposed in CN202323061655.3, which includes a spray gun, an extension rod, and a sealing gasket. The extension rod is connected to the spray gun by threads, and the sealing gasket is arranged at the connection between the spray gun and the extension rod. The sealing gasket includes a gasket body, a through hole for the paint to flow through is formed in the middle of the gasket body, elastic sealing parts are formed on both sides of the through hole of the gasket body, the inner side and the outer side of the elastic sealing part both converge towards the center of the through hole, and an installation protrusion is also formed on the gasket body. The installation protrusion is installed in the inner wall of the extension rod by interference fit; the special-shaped gasket is selected to replace the traditional flat gasket. Due to the existence of the elastic sealing part, when the pressure of the paint inside the spraying machine is greater, the greater the deformation of the elastic sealing part, and the tighter the outer side of the elastic sealing part fits with the wall surfaces of the spray gun and the extension rod; the replacement and disassembly of the extension rod can be directly screwed by hand to ensure the sealing performance, and no longer rely on a wrench, and the replacement and disassembly of the extension rod are more rapid.

[0004] However, for the sealing connection structure between the spray gun and the extension rod in a high-pressure airless spraying machine in the above technology, although the method of bolt connection is avoided for fixation, a relatively large force is still required to pull out the extension rod during disassembly, and after frequent installation and disassembly, the installation protrusion will inevitably cause wear, resulting in looseness at the connection; therefore, a spray gun for an airless spraying machine is proposed for the above problems. Content of the Utility Model

[0005] In order to make up for the deficiencies of the prior art, for the problem that in the sealing connection structure between the spray gun and the extension rod in a high-pressure airless spraying machine in the above technology, although the method of bolt connection is avoided for fixation, a relatively large force is still required to pull out the extension rod during disassembly, and after frequent installation and disassembly, the installation protrusion will inevitably cause wear, resulting in looseness at the connection, the utility model proposes a spray gun for an airless spraying machine.

[0006] The technical solution adopted by the present utility model to solve its technical problems is as follows: A spray gun for a paint spraying machine without air according to the present utility model includes a spray gun body, a connecting member, a spray rod, and a spray head. The spray gun body is fixedly connected to the connecting member; a connecting mechanism is provided between the connecting member and the spray rod. The connecting mechanism includes four groups of sliders. The sliders are fixedly connected to the inner wall on the left side of the spray rod. The sliders are slidably connected in a chute. The chute is opened on the connecting member. An insertion block is inserted on the slider. The insertion block is fixedly connected to a sliding ring. A plurality of insertion columns and a first spring are fixedly connected to the left side of the sliding ring. The left side of the insertion column is inserted into a fixed ring. The fixed ring is fixedly connected to the connecting member. The left side of the insertion column abuts against a top block. The top block is fixedly connected to a connecting sleeve. The connecting sleeve is threadedly connected to the connecting member.

[0007] Preferably, a groove is opened on the right side of the connecting member. The inner wall of the groove is fixedly connected to a second spring. The right side of the second spring is fixedly connected to a rubber ring. The right side of the rubber ring abuts against the inner wall on the left side of the spray rod. A rubber circle is fixedly connected to the inner wall on the left side of the spray rod.

[0008] Preferably, four groups of fixing grooves are opened on the right side of the connecting member. A fixing column is inserted into the fixing groove. The fixing column is fixedly connected to a moving ring. A magnet is fixedly connected to the moving ring. The moving ring is sleeved on the outer side of the spray rod.

[0009] Preferably, the right side of the connecting sleeve abuts against a first retaining ring. A second retaining ring is provided on the left side of the connecting sleeve. Both the first retaining ring and the second retaining ring are fixedly connected to the connecting member.

[0010] Preferably, a sleeve is fixedly connected to the outer side of the connecting sleeve. The sleeve is sleeved on the outer sides of the sliding ring and the fixed ring.

[0011] Preferably, a gasket is fixedly connected to the right side of the insertion block. The gasket is made of rubber material.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1. Through the structural design of the connecting mechanism of the present utility model, the function of facilitating the connection of the connecting member and the spray rod is realized, and the problem of the sealing connection structure between the spray gun and the extension rod in a high-pressure airless spray gun in the above-mentioned technology is solved. Although the bolt connection method is avoided for fixation, a relatively large force is still required to pull out the extension rod during disassembly, and after frequent installation and disassembly, the installation protrusion will inevitably cause wear, resulting in looseness at the connection.

[0014] 2. Through the structural design of the rubber ring and the rubber gasket, the present utility model realizes the function of sealing the connection between the connecting piece and the spray rod. A second spring is fixed to the left side of the rubber ring, and the second spring is used to support the rubber ring so that the rubber ring can keep abutting against the inner wall of the left side of the spray rod and cooperate with the rubber gasket to achieve sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0017] Figure 2 is a sectional structural schematic diagram of the present utility model;

[0018] Figure 3 is a sectional structural schematic diagram of the connection between the connecting piece and the spray rod of the present utility model;

[0019] Figure 4 is a connection structural schematic diagram of the sleeve of the present utility model;

[0020] Figure 5 is a structural schematic diagram of the connecting piece of the present utility model;

[0021] Figure 6 is a structural schematic diagram of the interior of the spray rod of the present utility model.

[0022] In the figure: 1, spray gun main body; 20, connecting piece; 21, spray rod; 22, nozzle; 23, slider; 24, chute; 25, insert block; 26, sliding ring; 27, insert post; 28, fixed ring; 29, first spring; 30, top block; 31, connection sleeve; 32, groove; 33, second spring; 34, rubber ring; 35, rubber gasket; 36, moving ring; 37, magnet; 38, fixed post; 39, fixed groove; 40, gasket; 41, sleeve; 42, first retaining ring; 43, second retaining ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

[0024] Please refer to Figure 1 - Figure 6 As shown in the figure, a spray gun for a paint spraying machine without air includes a spray gun body 1, a connecting member 20, a spray rod 21 and a spray head 22. The spray gun body 1 and the connecting member 20 are fixed by welding; a connecting mechanism is provided between the connecting member 20 and the spray rod 21. The connecting mechanism includes four groups of sliders 23. The four groups of sliders 23 are circumferentially distributed inside the spray rod 21. The sliders 23 are welded and fixed on the inner wall of the left side of the spray rod 21. The sliders 23 are slidably connected in the chute 24. The chute 24 is designed in an L shape and is opened on the connecting member 20. An insertion block 25 is inserted into the slider 23. The insertion block 25 is welded and fixed on the sliding ring 26. A plurality of insertion columns 27 and a first spring 29 are welded and fixed on the left side of the sliding ring 26. The first spring 29 is sleeved on the insertion column 27. The left side of the insertion column 27 is inserted into the fixing ring 28. The fixing ring 28 is welded and fixed on the connecting member 20. The left side of the insertion column 27 abuts against the top block 30. The top block 30 is welded and fixed on the connecting sleeve 31. The top block 30 is designed in a trapezoid shape. The connecting sleeve 31 is threadedly connected with the connecting member 20;

[0025] During operation, for the sealing connection structure between the spray gun and the extension rod in the above technology, although the method of bolt connection is avoided for fixation, a relatively large force is still required to pull off the extension rod during disassembly. Moreover, after frequent installation and disassembly, the installation protrusions will inevitably cause wear, resulting in looseness at the connection. Through the structural design of the connecting mechanism, the function of facilitating the connection between the connecting member 20 and the spray rod 21 is realized. When the connecting member 20 and the spray rod 21 are to be connected together, first pull the sliding ring 26 to the maximum position to the left, and the first spring 29 is compressed. Then align the four groups of sliders 23 on the inner wall of the left side of the spray rod 21 with the chute 24 opened on the surface of the connecting member 20 and insert them. Since the chute 24 is designed in an L shape as a whole. Therefore, when the slider 23 first abuts against the inner wall of the chute 24, then rotate the spray rod 21, and then stop pulling the sliding ring 26. Under the action of the first spring 29, the insertion block 25 fixed on the sliding ring 26 will be inserted into the slider 23, so as to be fixed with the slider 23 by clamping. At this time, in order to avoid accidentally touching the sliding ring 26 and causing the clamping fixation between the slider 23 and the insertion block 25 to be released, by rotating the connecting sleeve 31 by a small angle, the top block 30 fixed on the connecting sleeve 31 will abut against the insertion column 27, so as to hold the insertion column 27, thereby fixing the position of the sliding ring 26. Thus, the connection operation between the connecting member 20 and the spray rod 21 is completed. Similarly, when the spray rod 21 is to be removed, just rotate the connecting sleeve 31 again so that the top block 30 no longer abuts against the insertion column 27. At this time, by pulling the sliding ring 26 to the left, the clamping fixation between the slider 23 and the insertion block 25 can be released, and then pulling the slider 23 along the direction of the chute 24, the spray rod 21 can be successfully removed.

[0026] Furthermore, a groove 32 is formed on the right side of the connecting member 20, a second spring 33 is welded and fixed to the inner wall of the groove 32, the right side of the second spring 33 is glued and fixed to a rubber ring 34, the right side of the rubber ring 34 abuts against the inner wall of the left side of the spray rod 21, and a rubber ring 35 is glued and fixed to the inner wall of the left side of the spray rod 21;

[0027] During operation, the function of sealing the connection between the connecting piece 20 and the spray rod 21 is achieved through the structural design of the rubber ring 34 and the rubber ring 35. A second spring 33 is fixed on the left side of the rubber ring 34. The second spring 33 is used to support the rubber ring 34 so that the rubber ring 34 can maintain contact with the inner wall of the left side of the spray rod 21 and cooperate with the rubber ring 35 to achieve sealing. When the spray rod 21 is installed and fixed on the connecting piece 20, the left side of the inner wall of the spray rod 21 will contact the rubber ring 34, thereby improving the sealing of the connection between the connecting piece 20 and the spray rod 21 through the deformation of the rubber ring 34. The rubber ring 34 supports and fixes the second spring 33 for supporting the rubber ring 34. The inner wall of the spray rod 21 is fixed with a rubber ring 35 for cooperating with the rubber ring 34 for sealing, so that the sealing effect of the rubber ring 34 is better.

[0028] Furthermore, four sets of fixing grooves 39 are provided on the right side of the connecting member 20, and fixing columns 38 are inserted inside the fixing grooves 39. The fixing columns 38 are glued and fixed on the moving ring 36, and the moving ring 36 is glued and fixed with a magnet 37. The moving ring 36 is sleeved on the outer side of the spray rod 21;

[0029] During operation, the fixing column 38 is inserted into the fixing groove 39 to improve the connection strength between the connecting piece 20 and the spray rod 21, so that during normal use, no vibration occurs between the connecting piece 20 and the spray rod 21, and the movable ring 36 is fixed by the attraction of the magnet 37 and the spray rod 21. By moving the movable ring 36 to the right, the fixing column 38 inserted in the fixing groove 39 can be taken out.

[0030] Furthermore, the right side of the connecting sleeve 31 is in contact with the first retaining ring 42, and the left side of the connecting sleeve 31 is provided with a second retaining ring 43, and both the first retaining ring 42 and the second retaining ring 43 are welded and fixed on the connecting member 20;

[0031] During operation, the first retaining ring 42 is used to limit the maximum distance that the connecting sleeve 31 moves to the right, and the second retaining ring 43 is used to limit the maximum distance that the groove 32 moves to the left. The design of the first retaining ring 42 and the second retaining ring 43 ensures that the connecting sleeve 31 can move within a normal range.

[0032] Furthermore, a sleeve 41 is welded and fixed to the outer side of the connecting sleeve 31, and the sleeve 41 is sleeved on the outer side of the sliding ring 26 and the fixing ring 28;

[0033] During operation, the sleeve 41 is sleeved on the outer sides of the sliding ring 26 and the fixed ring 28 to provide protection for the sliding ring 26 , thereby reducing external interference to the sliding ring 26 .

[0034] Furthermore, a gasket 40 is glued and fixed to the right side of the insert block 25, and the gasket 40 is made of rubber;

[0035] During operation, the gasket 40 is made of rubber material and is used to buffer the insert block 25 and the inner wall of the slide groove 24 to prevent the insert block 25 from directly abutting against the inner wall of the slide groove 24 .

[0036] Working principle: A sealed connection structure between a spray gun and an extension rod in a high-pressure airless sprayer in the prior art avoids the use of bolted connections for fixation, but a large force is still required to pull out the extension rod during disassembly, and after frequent installation and disassembly, the installation protrusions will inevitably cause wear, resulting in looseness at the connection. A spray gun for an airless sprayer in this case realizes the function of facilitating the connection of the connecting member 20 and the spray rod 21 through the structural design of the connecting mechanism. When the connecting member 20 and the spray rod 21 are to be connected together, first pull the sliding ring 26 to the left to the maximum position, the first spring 29 is compressed, and then the four sets of sliders 23 on the left inner wall of the spray rod 21 are aligned with the slide groove 24 opened on the surface of the connecting member 20 and inserted into it. The slide groove 24 is designed to be L-shaped as a whole. Therefore, when the slider 23 abuts against the inner wall of the slide groove 24 for the first time, the spray rod 21 is rotated again, and the sliding ring 26 is no longer pulled. Under the action of the first spring 29, the plug 25 fixed on the sliding ring 26 will be inserted into the slider 23, so as to be fixed to the slider 23 by engagement. At this time, in order to avoid accidentally touching the sliding ring 26 and causing the engagement between the slider 23 and the plug 25 to be released, the top block 30 fixed on the connecting sleeve 31 is rotated at a small angle. The sliding ring 26 can be pulled to the left to release the engagement between the slider 23 and the plug block 25, and then the slider 23 can be pulled along the direction of the slide groove 24 to smoothly remove the spray rod 21.

[0037] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A spray gun for an airless spraying machine, comprising a spray gun body (1), a connecting piece (20), a spray rod (21) and a spray head (22), wherein the spray gun body (1) is fixedly connected to the connecting piece (20); characterized in that: A connection mechanism is provided between the connecting member (20) and the spray boom (21). The connection mechanism includes four groups of sliders (23). The sliders (23) are fixedly connected to the inner wall on the left side of the spray boom (21). The sliders (23) are slidably connected in the sliding grooves (24). The sliding grooves (24) are formed in the connecting member (20). An insertion block (25) is inserted into the slider (23). The insertion block (25) is fixedly connected to the sliding ring (26). A plurality of insertion columns (27) and a first spring (29) are fixedly connected to the left side of the sliding ring (26). The left side of the insertion column (27) is inserted into the fixed ring (28). The fixed ring (28) is fixedly connected to the connecting member (20). The left side of the insertion column (27) abuts against the top block (30). The top block (30) is fixedly connected to the connecting sleeve (31). The connecting sleeve (31) is threadedly connected to the connecting member (20).

2. The spray gun for an airless spraying machine according to claim 1, wherein: A groove (32) is formed on the right side of the connecting member (20). The inner wall of the groove (32) is fixedly connected to a second spring (33). The right side of the second spring (33) is fixedly connected to a rubber ring (34). The right side of the rubber ring (34) abuts against the inner wall on the left side of the spray boom (21). A rubber ring (35) is fixedly connected to the inner wall on the left side of the spray boom (21).

3. The spray gun for an airless spraying machine according to claim 2, characterized in that: Four fixing grooves (39) are formed on the right side of the connecting member (20). A fixing column (38) is inserted into the fixing groove (39). The fixing column (38) is fixedly connected to the moving ring (36). A magnet (37) is fixedly connected to the moving ring (36). The moving ring (36) is sleeved on the outer side of the spray boom (21).

4. The spray gun for an airless spraying machine according to claim 1, characterized in that: The right side of the connecting sleeve (31) abuts against the first retaining ring (42). A second retaining ring (43) is arranged on the left side of the connecting sleeve (31). Both the first retaining ring (42) and the second retaining ring (43) are fixedly connected to the connecting member (20).

5. The spray gun for an airless spraying machine according to claim 4, characterized in that: A sleeve (41) is fixedly connected to the outer side of the connecting sleeve (31). The sleeve (41) is sleeved on the outer sides of the sliding ring (26) and the fixed ring (28).

6. The spray gun for an airless spraying machine according to claim 1, wherein: A gasket (40) is fixedly connected to the right side of the insertion block (25). The gasket (40) is made of rubber material.

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