Anti-movement adjustment device and spray gun

Abstract

The present invention belongs to the technical field of polyurethane foam spray guns, and specifically relates to an anti-movement adjustment device, comprising a gun body, an adjustment sleeve and a positioning sleeve, the gun body is provided with a receiving cavity and a receiving hole, the adjustment sleeve is provided with a toggle portion, the positioning sleeve is provided with a threaded portion and a hollow through hole, the adjustment sleeve and the positioning sleeve are movably installed in the receiving cavity and the receiving hole respectively, a gap elimination device is provided between the adjustment sleeve and the receiving cavity, the threaded portion of the positioning sleeve is threadedly connected with the receiving hole, a main driving portion is provided at the axis of the adjustment sleeve, and the positioning sleeve is provided with a slave driving portion, which is penetrated by the main driving portion; the adjustment sleeve is rotated and the positioning sleeve is linked to rotate in the thread of the receiving hole, and the positioning sleeve generates axial displacement to realize adjustment; the present invention also avoids the positioning sleeve from deviating downward due to being suspended, avoids the scratching between the spring and the positioning sleeve during use, and improves the product grade and the user's control experience.

Description

Technical Field

[0001] The invention belongs to the technical field of polyurethane foam spray guns, and in particular relates to an anti-movement adjustment device and a spray gun. Background Art

[0002] Polyurethane foam has the functions of fixing, sound insulation, heat preservation, waterproofing and leak plugging, so it is used more and more widely, especially in the construction field. Correspondingly, the demand for spray guns used with polyurethane foam is also increasing. Various types of spray guns are constantly emerging, and problems in the use of spray guns also follow.

[0003] For example, the patent document with the announcement number CN101767073B discloses a foaming gun with a flow regulating device, including a positioning sleeve arranged in the gun body, the positioning sleeve is used to limit the axial sliding distance of the needle rod in the gun body, a screw sleeve is threadedly connected to the outer peripheral surface of the positioning sleeve, and the positioning sleeve can slide axially in the gun body and be fixed circumferentially relative to the gun body, the positioning sleeve is hollow, and a spring passes through the positioning sleeve with a gap; a prismatic positioning head is arranged at the end of the positioning sleeve, a prismatic sliding cavity is arranged in the gun body and is gap-matched with the positioning head, and the positioning head is gap-connected on the spring at the same time.

[0004] Since the locating sleeve is hollow and has a clearance fit with the internal spring and the external gun body sliding cavity, the locating sleeve and its threaded screw sleeve are actually in a suspended state during normal use. This will cause the locating sleeve and the screw sleeve to move forward and backward axially as well as in all directions such as up and down, left and right. Under the action of their own gravity, the locating sleeve will shift downward, resulting in eccentricity with the spring, which will reduce the gap between the locating sleeve and the upper part of the spring. When the needle rod moves back and forth to compress or prevent the spring from loosening, the spring may scratch the locating sleeve and make abnormal noises. On the other hand, it will also cause the screw sleeve to move forward and backward synchronously.

[0005] In summary, it will not only lead to a poor user experience, but also affect the user's impression of the quality of the spray gun, reduce the grade of the spray gun, and seriously affect the reputation and image of Chinese manufacturing. For this reason, it is necessary to improve it to overcome the shortcomings in practical applications. Summary of the invention

[0006] Based on the above-mentioned shortcomings and deficiencies in the prior art, one of the objects of the present invention is to at least solve one or more of the above-mentioned problems in the prior art. In other words, one of the objects of the present invention is to provide an anti-movement adjustment device that meets one or more of the above-mentioned needs.

[0007] A second object of the invention is to provide a spray gun that meets one or more of the above requirements.

[0008] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:

[0009] An anti-movement adjustment device comprises a gun body, an adjustment sleeve and a positioning sleeve, the gun body is provided with a accommodating cavity and a accommodating hole, the adjustment sleeve is provided with a toggle portion, the positioning sleeve is provided with a threaded portion and a hollow through hole, the adjustment sleeve and the positioning sleeve are movably installed in the accommodating cavity and the accommodating hole respectively, a gap elimination device is provided between the adjustment sleeve and the accommodating cavity, the threaded portion of the positioning sleeve is threadedly connected with the accommodating hole, a main driving portion is provided at the axis of the adjustment sleeve, and the positioning sleeve is provided with a slave driving portion, which is penetrated by the main driving portion; the adjustment sleeve is rotated and the positioning sleeve is linked to rotate in the thread of the accommodating hole, and the positioning sleeve generates axial displacement to realize adjustment.

[0010] As a preferred solution, the backlash eliminating device includes an elastic device and / or a magnetic device to keep the adjusting sleeve in contact with one end of the accommodating cavity.

[0011] As a preferred solution, the elastic device is provided with a groove at one end of the adjustment sleeve, and a compression spring is installed in the groove, so that the adjustment sleeve is kept in contact with one end of the accommodating cavity through the compression spring.

[0012] As a preferred solution, the elastic device is provided with a countersunk hole at one end of the adjusting sleeve, and a compression spring or an elastic rubber part and a spherical supporting part are installed in the countersunk hole.

[0013] As a preferred solution, one end of the accommodating cavity is provided with a concave and convex stop corresponding to the spherical supporting member to limit the radial free rotation of the adjusting sleeve.

[0014] As a preferred solution, the magnetic device is a magnet fixed in the axial hole of the gun body adjacent to the accommodating cavity, and the adjustment sleeve includes a metal material that can be attracted by the magnet, and the adjustment sleeve is brought into contact with one end of the accommodating cavity through magnetic force.

[0015] As a preferred solution, the main driving part is a flat cylindrical hole or an inner hexagonal hole, and the slave driving part is a flat cylinder or an outer hexagonal column correspondingly connected to the main driving part in a sliding manner.

[0016] As a preferred solution, the main driving part is provided with a cylindrical hole protruding inwardly, and the slave driving part is a cylinder with an inwardly concave sliding groove which is slidably connected to the main driving part.

[0017] As a preferred solution, the positioning sleeve is further provided with a screw-on portion for screwing into the threaded portion of the accommodating hole.

[0018] The present invention also provides a spray gun, on which is installed the anti-movement adjustment device as described in any of the above schemes, so as to achieve easy adjustment of the spray gun while preventing the adjustment device from moving.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention can effectively eliminate the axial and radial degrees of freedom between the adjusting sleeve and the accommodating cavity by arranging a clearance eliminating device between the adjusting sleeve and the accommodating cavity, thereby preventing the adjusting sleeve from moving.

[0021] 2. The present invention achieves effective support of the locating sleeve by the threaded connection between the locating sleeve and the accommodating hole, thereby eliminating the suspended state of the locating sleeve, thereby avoiding axial and radial movement of the locating sleeve, and maintaining the concentricity of the locating sleeve and the accommodating hole, preventing the locating sleeve from shifting downward, and avoiding scratching between the spring and the locating sleeve during use.

[0022] 3. In the present invention, the positioning sleeve is inserted into the adjusting sleeve and driven by the adjusting sleeve. The adjusting sleeve is rotated to link the positioning sleeve to rotate in the accommodating hole, so that the positioning sleeve generates axial displacement at the same time, thereby realizing easy adjustment.

[0023] 4. The present invention provides a concave and convex portion corresponding to the spherical support member at one end of the accommodating cavity of the gun body. When the adjusting sleeve is rotated, a "squeaking" sound can be emitted under the action of the elastic member, thereby improving the user's adjustment and control experience.

[0024] 5. The positioning sleeve of the present invention is provided with a screw-on portion, which facilitates the positioning sleeve to be quickly screwed into the gun body during assembly to improve assembly efficiency.

[0025] 6. The spray gun provided by the present invention, by using an anti-movement adjustment device, can also effectively prevent the movement and scratching of the adjustment device during the use of the spray gun, thereby achieving easy adjustment, improving the user's adjustment and control experience and improving assembly efficiency, which is conducive to the promotion and application of the anti-movement adjustment device on spray guns. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of the spray gun of the present invention;

[0027] Figure 2 is a partial cross-sectional view of the anti-movement adjustment device of the first embodiment of the present invention when it is adjusted to the rightmost end;

[0028] Figure 3 is a partial cross-sectional view of the anti-movement adjustment device of the first embodiment of the present invention when it is adjusted to the leftmost end;

[0029] Figure 4 is a front view of the adjustment sleeve of the first embodiment of the present invention;

[0030] Figure 5 yes Figure 4 AA section view in;

[0031] Figure 6 is a main cross-sectional view of a positioning sleeve according to a first embodiment of the present invention;

[0032] Figure 7 yes Figure 6 Left view of

[0033] Figure 8 is a front view of an adjustment sleeve according to a second embodiment of the present invention;

[0034] Fig. 9 yes Figure 8 BB section view in;

[0035] Fig.10 is a front view of a positioning sleeve according to a second embodiment of the present invention;

[0036] Fig.11 yes Fig.10 Left view of

[0037] Fig.12 is a partial cross-sectional view of the anti-movement adjustment device of the third embodiment of the present invention;

[0038] Fig.13 yes Fig.12 A partial enlarged view of the middle adjustment sleeve anti-backlash device I;

[0039] Fig.14 is a front view of an adjustment sleeve according to a third embodiment of the present invention;

[0040] Fig.15 yes Fig.14 CC section view in;

[0041] Fig.16 is a front view of an adjustment sleeve according to a fourth embodiment of the present invention;

[0042] Fig.17 yes Fig.16 DD section view in;

[0043] Fig.18 is a front view of an adjustment sleeve according to a fifth embodiment of the present invention;

[0044] Fig.19 yes Fig.18 EE cross-sectional view in;

[0045] Fig. 20 is a front view of a positioning sleeve according to a fifth embodiment of the present invention;

[0046] Fig.21 yes Fig. 20 Left view in;

[0047] Fig. 22 is a partial cross-sectional view of an anti-movement adjustment device according to a sixth embodiment of the present invention;

[0048] Fig.23 It is a partial cross-sectional view of the anti-movement adjustment device of embodiment 7 of the present invention.

[0049] In the figure: gun body 1, accommodating chamber 1a, accommodating hole 1b, concave-convex gear 1c, axial hole 1d, one-way valve 2, gun barrel 3, gun nozzle 4, trigger 5, adjusting sleeve 6, groove 6a, countersunk hole 6a', main driving part 6b, flat cylindrical hole 6b', inner hexagonal hole 6b", round through hole 6b"', positioning sleeve 7, threaded part 7a, slave driving part 7b, flat cylinder 7b', outer hexagonal column 7b", cylinder 7b"', hollow through hole 7c, rotating part 7d, sealing device 8, needle bar slider 9, spring 10, first compression spring 11, second compression spring 11', spherical support 12, magnet 13. DETAILED DESCRIPTION

[0050] In order to more clearly illustrate the embodiments of the present invention, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other accompanying drawings and other implementation methods can be obtained based on these accompanying drawings without creative work.

[0051] Embodiment 1:

[0052] like Figures 2 to 7 As shown, this embodiment provides an anti-movement adjustment device, including a gun body 1, an adjusting sleeve 6 and a positioning sleeve 7. A accommodating chamber 1a and an accommodating hole 1b are provided in the middle of the rear section of the gun body 1. The outer ring of the adjusting sleeve is provided with a toggle portion. The positioning sleeve 7 is provided with a threaded portion 7a and a hollow through hole 7c. The adjusting sleeve 6 and the positioning sleeve 7 are movably installed in the accommodating chamber 1a and the accommodating hole 1b respectively. A gap elimination device is provided between the adjusting sleeve 6 and the accommodating chamber 1a, specifically a first compression spring 11 that is compressed and installed between a groove 6a provided at one end of the adjusting sleeve 6 and one side of the accommodating chamber 1a. The other end of the adjusting sleeve 6 is kept in contact with the other side of the accommodating chamber 1a through the rebound force of the first compression spring 11, thereby eliminating the gap between the two, so as to prevent the adjustment sleeve 6 from moving in the accommodating chamber 1a.

[0053] Among them, the threaded portion of the positioning sleeve 7 is threadedly connected to the accommodating hole 1b to prevent the positioning sleeve 7 from moving in the accommodating hole 1b. The positioning sleeve 7 is also provided with a screw-on portion 7d on one side of the hollow through hole 7c to facilitate its rapid screwing into the threaded portion of the accommodating hole 1b during assembly. The axis of the adjusting sleeve 6 is also provided with a main drive portion 6b, and the positioning sleeve 7 is also provided with a slave drive portion 7b. The slave drive portion 7b of the positioning sleeve is penetrated by the main drive portion 6b of the adjusting sleeve. The main drive portion 6b of the adjusting sleeve is a flat cylindrical hole 6b', and the slave drive portion 7b of the positioning sleeve is a flat cylinder 7b' that is slidably connected to the main drive portion 6b of the adjusting sleeve.

[0054] Specifically, Figure 2The positioning sleeve is at the rightmost end, which is the maximum opening state. At this time, the adjusting sleeve 6 is rotated by the toggle part to link the positioning sleeve 7 with the thread of the accommodating hole 1b, so that the positioning sleeve 7 is simultaneously axially displaced to the left until the positioning sleeve is displaced to Figure 3 The leftmost opening is in the minimum state, which enables easy adjustment; conversely, the adjusting sleeve 6 can be rotated in the reverse direction by the toggle part to link the positioning sleeve 7 with the rotation in the thread of the receiving hole 1b, so that the positioning sleeve 7 can be simultaneously axially displaced to the right until the positioning sleeve is displaced back to Figure 3 The rightmost end is shown in the maximum opening state, allowing easy adjustment.

[0055] The positioning sleeve 7 in this embodiment is a hollow structure, but because its threaded portion 7a is threadedly connected to the gun body receiving hole 1b, the problem of the positioning sleeve 7 being deflected downward due to being suspended is effectively solved, so that it is always in a centered state during the adjustment process, thereby avoiding scratches and abnormal noises with the parts installed inside.

[0056] The anti-movement adjustment device of this embodiment can not only eliminate the axial clearance of the adjusting sleeve, quickly install the positioning sleeve, stably center it, prevent movement during the adjustment process, and achieve easy adjustment, but also prevent scratches and abnormal noises of the positioning sleeve, thereby improving the product grade.

[0057] Embodiment 2:

[0058] This embodiment provides an anti-movement adjustment device, which is different from the first embodiment in that the drive unit structure is:

[0059] like Figures 8 to 9 As shown, the main driving part of the adjustment sleeve in this embodiment is a hexagonal hole 6b", as shown in FIG. Figure 10 to Figure 11 As shown, the slave driving part of the positioning sleeve is an outer hexagonal column 7b" which is slidably connected to the main driving part of the inner hexagonal hole 6b" of the adjusting sleeve.

[0060] The hexagonal hole or hexagonal column structure of this embodiment is easy to obtain materials, reduces the processing steps, and is beneficial to improving the processing efficiency of the two parts of the adjustment sleeve and the positioning sleeve and reducing costs.

[0061] For other specific structures and specific implementation processes, please refer to Example 1.

[0062] Embodiment three:

[0063] This embodiment provides an anti-movement adjustment device, which is different from the first embodiment mainly in the structure of the anti-backlash device adopted:

[0064] like Figures 12 to 15As shown, the gap eliminating device adopted in this embodiment is a countersunk hole 6a' provided at one end of the adjusting sleeve, and a second compression spring 11' and a spherical support member 12 are compressed and installed in the countersunk hole 6a'. The rebound force of the second compression spring 11' is used to ensure that the other end of the adjusting sleeve is in contact with the other side of the accommodating chamber 1a, thereby eliminating the gap between the two, so as to prevent the adjusting sleeve from moving in the accommodating chamber 1a. The spherical support member 12 facilitates the smoother rotation of the adjusting sleeve.

[0065] In this embodiment, one end of the accommodating cavity is provided with a concave-convex step 1c corresponding to the spherical support member 12 to limit the radial rotation freedom of the adjusting sleeve and prevent it from rotating on its own.

[0066] In addition, the second compression spring 11 ′ in the present embodiment may also be replaced by an elastic rubber member, and the elastic force of the rubber member can also achieve the effect of eliminating the gap.

[0067] The backlash eliminating device of this embodiment can also be evenly distributed along the end surface of the adjusting sleeve, so that the adjusting sleeve is subjected to more uniform force, and the adjusting sleeve and the accommodating cavity 1a fit more closely.

[0068] The structural design of the adjustment sleeve of this embodiment is ingenious, simple and easy, and has low manufacturing cost. The setting of the concave and convex steps of the accommodating cavity can also prevent the adjustment sleeve from self-rotating, and during the adjustment and rotation process of the adjustment sleeve, a "squeaking" sound will be emitted, which is beneficial to improving the experience of adjustment and control.

[0069] For other specific structures and specific implementation processes, please refer to Example 1.

[0070] Embodiment 4:

[0071] This embodiment provides an anti-movement adjustment device, which is different from the third embodiment mainly in the structure of the driving part:

[0072] like Figure 16 to Figure 17 As shown, the main driving part of the adjustment sleeve in this embodiment is a hexagonal hole 6b", as shown in FIG. Figure 10 to Figure 11 As shown, the slave driving part of the positioning sleeve is an outer hexagonal column 7b" which is slidably connected to the main driving part of the inner hexagonal hole 6b" of the adjusting sleeve.

[0073] The hexagonal hole or hexagonal column structure of this embodiment is easy to obtain materials, reduces the processing steps, and is beneficial to improving the processing efficiency of the two parts of the adjustment sleeve and the positioning sleeve and reducing costs.

[0074] For other specific structures and specific implementation processes, please refer to Example 3.

[0075] Embodiment five:

[0076] This embodiment provides an anti-movement adjustment device, which is different from the third embodiment mainly in the structure of the driving part:

[0077] like Figure 18 to Figure 19 As shown, the main driving part of the adjusting sleeve in this embodiment is provided with a round through hole 6b"' protruding inwardly, as shown in FIG. Figure 20 to Figure 21 As shown, the positioning sleeve slave driving part is a cylinder 7b"' having an inner concave sliding groove which is slidably connected to the main driving part of the circular through hole 6b"' of the adjusting sleeve.

[0078] The round through hole or cylindrical structure of the present embodiment is convenient to obtain materials and process, which is beneficial to improving the processing efficiency of the two parts, the adjustment sleeve and the positioning sleeve, and reducing the cost.

[0079] For other specific structures and specific implementation processes, please refer to Example 3.

[0080] Embodiment six:

[0081] This embodiment provides an anti-movement adjustment device, which is different from the first embodiment mainly in the structure of the anti-backlash device adopted:

[0082] like Fig. 22 As shown, the gap elimination device adopted in this embodiment is a magnet 13 fixed in the axial hole 1d of the gun body adjacent to the accommodating cavity. The adjusting sleeve includes a metal material that can be attracted by the magnet. The adjusting sleeve is brought into contact with one end of the accommodating cavity through magnetic force to prevent the adjusting sleeve from moving in the accommodating cavity.

[0083] The anti-backlash device of this embodiment relies on magnetic attraction to prevent the adjustment sleeve from moving. The structural design is ingenious, providing a different control experience.

[0084] For other specific structures and specific implementation processes, please refer to Example 1.

[0085] Embodiment seven:

[0086] This embodiment provides an anti-movement adjustment device, which is different from the third embodiment mainly in the structure of the anti-backlash device adopted:

[0087] like Fig.23 As shown, the gap eliminating device adopted in this embodiment is based on the elastic device adopted in the third embodiment, and a magnetic device is added to eliminate the gap, so that the elastic device and the magnetic device simultaneously eliminate the gap between the adjustment sleeve and the accommodating cavity to prevent the adjustment sleeve from moving in the accommodating cavity.

[0088] The elastic device of this embodiment may also adopt the elastic device of the first embodiment.

[0089] The backlash eliminating device of this embodiment combines the elastic device and the magnetic device, providing the user with an additional option and scope for selection.

[0090] For other specific structures and specific implementation processes, please refer to Example 1.

[0091] Compared with the prior art, the above-mentioned anti-movement adjustment devices provided by the present invention have the following beneficial effects:

[0092] Firstly, by providing a clearance eliminating device between the adjusting sleeve and the accommodating cavity, the axial and radial degrees of freedom between the adjusting sleeve and the accommodating cavity can be effectively eliminated, thereby preventing the adjusting sleeve from moving.

[0093] Secondly, through the threaded connection between the locating sleeve and the accommodating hole, the locating sleeve is effectively supported by the accommodating hole, thereby eliminating the suspended state of the locating sleeve, thereby avoiding axial and radial movement of the locating sleeve, and maintaining the concentricity of the locating sleeve and the accommodating hole, preventing the locating sleeve from shifting downward, and avoiding scratches between other parts and the locating sleeve during use.

[0094] Secondly, the positioning sleeve is inserted into the adjusting sleeve and driven by the adjusting sleeve, and the adjusting sleeve is rotated to link the positioning sleeve to rotate in the accommodating hole, so that the positioning sleeve generates axial displacement at the same time, thereby realizing easy adjustment.

[0095] Fourthly, a concave and convex portion corresponding to the spherical support member is provided at one end of the accommodating cavity of the gun body. When the adjusting sleeve is rotated, a "squeaking" sound can be made under the action of the elastic member, thereby improving the user's adjustment and control experience.

[0096] Fifth, the positioning sleeve is provided with a screw-on portion, which facilitates the positioning sleeve to be quickly screwed into the gun body during assembly to improve assembly efficiency.

[0097] Embodiment eight:

[0098] like Figure 1 As shown, this embodiment provides a spray gun with the above-mentioned anti-movement adjustment device, including a gun body 1, a one-way valve 2, a gun barrel 3 and a gun nozzle 4, a needle bar and a needle bar slider 9, a trigger 5, a spring 10 and an adjustment device.

[0099] In this embodiment, the through hole at the front end of the gun body 1 connects the gun barrel 3 and the gun nozzle 4, and a sealing device 8 is provided in the rear end through hole. The needle rod passes through the center of the sealing device 8 and is placed in the gun barrel 3. The front end of the needle rod is tightly against the inner wall of the gun nozzle 4, forming a closed internal space in the front half of the gun body 1 for the foaming agent to flow.

[0100] The adjusting sleeve 6, positioning sleeve 7, needle bar slide block 9 and spring 10 in this embodiment are coaxially arranged to ensure that the adjustment sleeve 6 and positioning sleeve 7 are more accurately matched to avoid misalignment. The positioning sleeve 7 is used to adjust the sliding distance of the needle bar in the gun barrel 3 by changing the axial distance with the needle bar slide block 9. When the opening is adjusted to the maximum, the positioning sleeve 7 abuts against the rightmost end of the gun body 1, and when the opening is adjusted to the minimum, the positioning sleeve 7 abuts against the needle bar slide block 9.

[0101] When in use, the adjusting sleeve 6 is rotated to drive the positioning sleeve 7 to rotate, and the positioning sleeve 7 is linked to move axially along the gun body 1 to adjust the spacing between the positioning sleeve 7 and the needle bar slider 9, so as to adjust the opening between the needle bar and the gun mouth 4. The trigger 5 is pulled backward to move the needle bar slider 9 backward, and the needle bar is immediately separated from the inner wall of the gun mouth 4, opening the passage for the foaming agent to be sprayed out through the inner hole of the gun mouth. After use, the trigger 5 is released, and the needle bar is reset under the action of the spring 10, and it is pressed against the inner wall of the gun mouth 4 again, closing the spraying passage of the foaming agent, and the foaming agent immediately stops spraying out from the inner hole of the gun mouth 4.

[0102] The spray gun provided in this embodiment, by using the above-mentioned lightweight adjustment device to prevent movement and scratching of the adjustment device during the use of the spray gun, can also effectively prevent the adjustment device from moving and scratching during the use of the spray gun, achieve lightweight adjustment, and improve the user's adjustment and control experience and assembly efficiency.

[0103] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0104] Although the present invention uses more reference numerals in the figures: gun body 1, accommodating chamber 1a, accommodating hole 1b, concave-convex gear 1c, shaft hole 1d, one-way valve 2, gun barrel 3, gun nozzle 4, trigger 5, adjustment sleeve 6, groove 6a, counterbore 6a', main driving part 6b, flat cylindrical hole 6b', inner hexagonal hole 6b", round through hole 6b'", positioning sleeve 7, threaded part 7a, slave driving part 7b, flat cylinder 7b', outer hexagonal column 7b", cylinder 7b'", hollow through hole 7c, rotating part 7d, sealing device 8, needle bar slider 9, spring 10, first compression spring 11, second compression spring 11', spherical support 12, magnet 13 and other terms, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. An anti-movement adjustment device, comprising a gun body, an adjustment sleeve and a positioning sleeve, wherein the gun body is provided with a receiving cavity and a receiving hole, the adjustment sleeve is provided with a toggle portion, the positioning sleeve is provided with a threaded portion and a hollow through hole, the adjustment sleeve and the positioning sleeve are movably installed in the receiving cavity and the receiving hole, respectively, and characterized in that: A clearance eliminating device is provided between the adjusting sleeve and the accommodating cavity, the threaded portion of the positioning sleeve is threadedly connected to the accommodating hole, a main driving portion is provided at the axis of the adjusting sleeve, and a slave driving portion is provided at the positioning sleeve, and the slave driving portion is inserted into the main driving portion; the adjusting sleeve is rotated and the positioning sleeve is linked to rotate in the thread of the accommodating hole, and the positioning sleeve generates axial displacement to achieve adjustment; The anti-backlash device includes an elastic device and / or a magnetic device to keep the adjustment sleeve in contact with one end of the accommodating cavity; The elastic device is provided with a groove at one end of the adjustment sleeve, and a compression spring is installed in the groove, so that the adjustment sleeve is kept in contact with one end of the accommodating cavity through the compression spring, or the elastic device is provided with a countersunk hole at one end of the adjustment sleeve, and a compression spring or an elastic rubber part and a spherical support part are installed in the countersunk hole, and a concave and convex gear corresponding to the spherical support part is provided at one end of the accommodating cavity to limit the radial free rotation of the adjustment sleeve; The magnetic device is a magnet fixed in the axial hole of the gun body adjacent to the accommodating cavity, and the adjustment sleeve comprises a metal material that can be attracted by the magnet, and the adjustment sleeve is brought into contact with one end of the accommodating cavity through magnetic force; The main driving part is a flat cylindrical hole or an internal hexagonal hole, and the slave driving part is a flat cylinder or an external hexagonal cylinder that is slidably connected to the main driving part, or the main driving part is a cylindrical hole with an inward protrusion, and the slave driving part is a cylinder with an inward concave groove that is slidably connected to the main driving part.

2. The anti-movement adjustment device according to claim 1, characterized in that: The positioning sleeve is also provided with a screw-on portion for screwing into the threaded portion of the accommodating hole.

3. A spray gun, characterized in that: The spray gun is equipped with the anti-movement adjustment device according to claim 1 or 2.

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