Internal thread sealant rotary gluing machine and gluing method

Abstract

The invention relates to the technical field of gluing machines, in particular to an internal thread sealant rotary gluing machine and a gluing method.The gluing machine comprises a support assembly, a pneumatic control assembly, a sealant supply assembly and a shell assembly are installed on the support assembly, and the output end of the pneumatic control assembly is connected with the input end of the sealant supply assembly; the output end of the sealant supply assembly is connected with the input end of the sealant conveying pipeline assembly, a sealant nozzle is mounted on the sealant conveying pipeline assembly, and the output end of the sealant conveying pipeline assembly is connected with the input end of the sealant nozzle to form a sealant conveying passage; the glue nozzle is installed on the gluing adjusting assembly, and the gluing adjusting assembly is installed on one side of the shell assembly in an up-down moving mode. A replaceable rotary sleeve assembly is coaxially and rotatably mounted at the bottom end of the shell assembly, the replaceable rotary sleeve assembly can rotate around the axis of the replaceable rotary sleeve assembly relative to the shell assembly, and the glue nozzle can move on the gluing adjusting assembly in the radial direction of the replaceable rotary sleeve assembly. According to the device, a continuous and uniform sealing glue layer can be smeared on the internal threads of the speed reducer shell cover.

Description

Technical Field

[0001] The invention relates to the technical field of glue coating machines, and in particular to a rotary glue coating machine for internal thread sealant and a glue coating method. Background Art

[0002] The intermediate and final reducers of automobiles are key component assemblies of medium and heavy-duty trucks and are an indispensable part of the automotive parts assembly process. During the assembly of the intermediate and final reducers, in order to ensure the airtightness of the adjusting nut at the input end, the process requires that sealant be evenly applied to the internal threads of the reducer housing cover.

[0003] Before applying sealant, the reducer housing cover is already assembled on the reducer housing. The reducer housing cover houses the input shaft in the center and bearings below. Therefore, the application can only be completed in the narrow space between the input shaft and the internal threads of the reducer housing cover. Due to the limited operating space, the operator must rotate their body at least once to apply the sealant all the way around the reducer housing. The current common method is to use a glue gun to apply the sealant to the surface of the reducer housing's internal threads in at least two steps, then use a scraper to smooth the sealant evenly until the entire thread is covered. This single operation takes at least 38 seconds.

[0004] The existing gluing method has obvious defects: the operator's movements are cumbersome and difficult to operate, resulting in high operating costs and low efficiency; it is difficult to manually control the amount of glue output, and two applications can easily lead to discontinuous or overlapping sealants, affecting the consistency and uniformity of the glue coating, thereby increasing the risk of airtightness failure; in addition, during the scraper leveling process, the sealant can easily overflow from the reducer housing cover or contaminate the bearing below, causing contamination of the reducer, making it difficult to ensure cleanliness requirements. Summary of the Invention

[0005] In order to solve the technical problem, the present invention provides a rotary coating machine for internal thread sealant on the one hand, and a coating method on the other hand. The rotary coating machine for internal thread sealant of the present invention adopts handheld operation, and the replaceable rotary sleeve assembly can rotate around its own axis relative to the outer shell assembly. The replaceable rotary sleeve assembly can be sleeved on the outside of the reducer input shaft, so a rotary coating method can be used to apply a continuous sealant layer on the surface of the internal thread of the reducer shell cover, which reduces the difficulty and labor cost of manual operation, simplifies the work process, and improves work efficiency; the high-pressure air source provided by the existing air source pipeline of the production line is used as power to realize glue supply and glue extrusion, which can achieve uniform and controllable glue output, ensure the consistency of glue amount, and reduce the risk of airtightness failure; by adjusting the position of the glue nozzle, the relative position of the glue nozzle and the internal thread of the reducer shell cover can be adjusted, which can not only apply and smooth at the same time, but also adapt to reducer shell covers of different specifications, without manual smoothing, and easy to ensure cleanliness requirements.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the internal thread sealant rotary coating machine of the present invention is as follows: A rotary glue coating machine for internal thread sealant includes a bracket assembly, on which a pneumatic control assembly, a sealant supply assembly and a shell assembly are installed, the output end of the pneumatic control assembly is connected to the input end of the sealant supply assembly to form a pneumatic passage for supplying glue; the output end of the sealant supply assembly is connected to the input end of the glue delivery pipeline assembly, the output end of the glue delivery pipeline assembly is installed with a glue nozzle, the output end of the glue delivery pipeline assembly is connected to the input end of the glue nozzle to form a glue delivery passage; the shell assembly is columnar, and a replaceable rotating sleeve assembly is coaxially installed at the bottom end of the shell assembly, the replaceable rotating sleeve assembly can rotate around its own axis relative to the shell assembly, and the replaceable rotating sleeve assembly is used to be sleeved on the outside of the reducer input shaft; the glue nozzle is installed on the glue coating adjustment assembly, and the glue coating adjustment assembly is installed on one side of the shell assembly in an axial direction of the replaceable rotating sleeve assembly, and the glue nozzle can move in a radial direction of the replaceable rotating sleeve assembly on the glue coating adjustment assembly.

[0007] By adopting the above-mentioned structural scheme, the present invention integrates the pneumatic control assembly, the sealant supply assembly, the outer shell assembly and other components into the bracket assembly, thus constructing a complete glue supply, glue delivery and glue coating system. The replaceable rotary sleeve assembly is sleeved on the outside of the reducer input shaft. Since the replaceable rotary sleeve assembly can rotate around its own axis relative to the outer shell assembly, when the internal thread sealant rotary glue coating machine of the present invention is held for glue coating, the glue nozzle can rotate relative to the reducer housing cover and the reducer input shaft, thereby performing rotary glue coating and applying a continuous sealant layer on the inner thread surface of the reducer housing cover, thereby reducing the difficulty of operation and labor costs, simplifying the work process and improving work efficiency. The present invention adopts an air source pipeline to provide power. Compared with manual control of glue discharge, the power is stable and sustainable, the glue discharge amount is stable and uniform, and the glue amount consistency can be ensured, reducing the risk of airtightness failure. The glue nozzle of the present invention can move along the axial and radial directions of the replaceable rotating sleeve assembly, which is convenient for adjusting the height of the glue nozzle and the distance between the glue nozzle and the internal thread surface. It is convenient for applying and scraping at the same time, and can adapt to reducer housing covers of different specifications. It does not require manual scraping, is easy to ensure cleanliness requirements, does not require manual position adjustment, and simplifies the work process.

[0008] As a preferred implementation method of an internal thread sealant rotary coating machine, the coating adjustment assembly includes an adjustment assembly cover, a nozzle fixing block, an upper and lower adjustment assembly, left and right adjustment bolts and left and right adjustment blocks; the adjustment assembly cover is fixed to the top of the nozzle fixing block, the nozzle fixing block is connected to the nozzle, and the nozzle fixing block is installed on the left and right adjustment blocks; the left and right adjustment blocks are movably installed on the upper and lower adjustment assemblies, and the moving path of the left and right adjustment blocks is arranged radially along the replaceable rotating sleeve assembly; the upper and lower adjustment assembly is movably installed on one side of the outer shell assembly along the axial direction of the replaceable rotating sleeve assembly; the left and right adjusting bolts are threadedly connected to the upper and lower adjustment assemblies, and the axial direction of the left and right adjusting bolts is arranged radially along the replaceable rotating sleeve assembly; one end of the left and right adjusting bolts is in contact with the left and right adjusting blocks, and the left and right adjusting blocks can be moved along the radial direction of the replaceable rotating sleeve assembly by rotating the left and right adjusting bolts.

[0009] By adopting the above-mentioned structural scheme, the nozzle can be flexibly adjusted in the axial and radial dimensions of the replaceable rotating sleeve assembly by adjusting the coordination of the assembly cover, the nozzle fixing block, the upper and lower adjustment assembly, the left and right adjustment bolts and the left and right adjustment blocks, thereby ensuring that the sealant is accurately applied and scraped flat on the internal thread surface, further improving the uniformity and fit of the glue coating, avoiding product air tightness and cleanliness problems caused by sealant application deviation, and ensuring product quality.

[0010] As a preferred implementation method of an internal thread sealant rotary coating machine, the up and down adjustment assembly includes an up and down adjustment block, a left and right adjustment slide, a left and right return spring, an up and down adjustment nut and a left and right adjustment nut; the up and down adjustment block is moved along the axial direction of the replaceable rotating sleeve assembly and is installed on one side of the outer shell assembly, and the side of the up and down adjustment block close to the outer shell assembly is fixedly connected to the up and down adjustment nut, the axial direction of the up and down adjustment nut is set parallel to the axial direction of the replaceable rotating sleeve assembly, and the up and down adjustment nut is connected to the outer shell assembly through an up and down adjustment bolt; the side of the up and down adjustment block away from the outer shell assembly is fixedly connected to the left and right adjustment nuts, and the left and right adjustment nuts are threadedly connected to the left and right adjustment bolts; the left and right adjustment slides are arranged in the upper and lower adjustment blocks along the radial direction of the replaceable rotating sleeve assembly, and the left and right adjustment blocks are slidably installed on the left and right adjustment slides; one end of the left and right return springs is installed on the upper and lower adjustment block, and the other end of the left and right return springs is installed on the left and right adjustment block.

[0011] By adopting the above-mentioned structural scheme, the arrangement of each component in the upper and lower adjustment assembly provides a stable and flexible basis for adjusting the position of the glue nozzle. The left and right adjustment slides ensure the smoothness and directionality of the movement of the left and right adjustment blocks. The left and right return springs can enable the adjusted glue nozzle to automatically reset when it is slightly disturbed by external forces, maintain a stable gluing position, and enhance the stability and reliability of the glue coating machine. At the same time, the cooperation of the upper and lower adjustment nuts and the upper and lower adjustment bolts realizes the precise adjustment of the glue nozzle along the axial direction, which is convenient for adapting to the internal threads of the reducer housing cover at different heights, and expands the scope of application of the glue coating machine.

[0012] As a preferred implementation method of an internal thread sealant rotary coating machine, the upper and lower adjustment blocks include left and right limit grooves, left and right adjustment nut holes, upper and lower adjustment nut holes, left and right slide mounting holes, glue nozzle limit holes, left and right adjustment bolt holes, return spring mounting holes, upper and lower limit protrusions, upper and lower slide holes and upper and lower adjustment bolt holes; left and right limit grooves are opened on the top of the upper and lower adjustment blocks, and the glue nozzle passes through the left and right limit grooves and is connected to the left and right adjustment blocks; left and right adjustment nut holes and left and right adjustment bolt holes are opened on the side of the upper and lower adjustment blocks away from the outer shell assembly, and the left and right adjustment nut holes and the left and right adjustment bolt holes are connected at 90°, and left and right adjusting nuts are fixedly installed in the left and right adjustment nut holes, and the left and right adjustment bolt holes are threadedly connected to the left and right adjusting bolts, and the left and right adjustment bolt holes are connected to the left and right limit grooves; the upper and lower adjustment blocks are opened on the side close to the outer shell assembly There are upper and lower adjusting nut holes and upper and lower adjusting bolt holes, which are connected to each other at 90°, and upper and lower adjusting nuts are fixedly installed in the upper and lower adjusting nut holes, and the upper and lower adjusting bolt holes are threadedly connected to the upper and lower adjusting bolts; the left and right slide mounting holes are connected to the left and right limit grooves, and the left and right slide mounting holes are used to install the left and right adjustment slides; the left and right limit grooves are close to the inner wall of the outer shell assembly on one side. The return spring mounting hole is coaxial with the left and right slide mounting holes, and the return spring mounting hole is used to install the left and right return springs; the bottom of the left and right limit grooves is provided with a nozzle limiting hole, and the nozzle can move axially along the left and right adjusting bolts in the nozzle limiting hole; the side walls of the upper and lower adjusting blocks protrude to form upper and lower limit protrusions, and the upper and lower limit protrusions are provided with upper and lower slide holes arranged along the axial direction of the replaceable rotating sleeve assembly.

[0013] The above-mentioned structural scheme and the reasonable layout of structures such as the left and right limit grooves, the left and right adjustment nut holes, etc. enable the left and right adjustment blocks, the left and right adjustment bolts and the left and right adjustment nuts and other components to be accurately installed and matched, ensuring the accuracy and stability of the nozzle adjustment; the nozzle limit hole can ensure that the nozzle will not shift during the adjustment process, ensuring the accuracy of the gluing position; the upper and lower limit protrusions and the upper and lower slideway holes cooperate with the outer shell assembly to achieve stable axial movement of the upper and lower adjustment blocks, facilitate stable adjustment of the nozzle height to adapt to the internal threads of the reducer housing cover of different specifications, and improve the gluing quality.

[0014] As a preferred implementation method of an internal thread sealant rotary coating machine, the outer shell assembly includes an outer top cover, an outer middle layer, an outer bottom shell, a sleeve limit bearing, upper and lower adjustment slides and upper and lower adjustment bolts, and the outer top cover, outer middle layer and outer bottom shell are connected in sequence up and down; the outer bottom shell is connected to the upper and lower adjustment slides, the upper and lower adjustment slides pass through the upper and lower slide holes, and the upper and lower adjustment slides are connected to the upper and lower slide holes in an up and down sliding manner; the outer middle layer is threadedly connected to the upper and lower adjustment bolts, the upper and lower adjustment bolts pass through the upper and lower adjustment bolt holes, and the upper and lower adjustment bolts are threadedly connected to the upper and lower adjustment nuts; the sleeve limit bearing is installed inside the outer bottom shell, and the sleeve limit bearing is used to connect to the replaceable rotary sleeve assembly.

[0015] The above-mentioned structural scheme and the structural design of the outer shell assembly provide a stable support and connection foundation for the glue nozzle and glue application adjustment assembly. The sequential connection of the outer top cover, outer middle layer, outer bottom shell, and sleeve limit bearing ensures the stable rotation of the replaceable rotating sleeve assembly. The upper and lower adjustment slides and the upper and lower adjustment bolts cooperate with the upper and lower adjustment blocks to achieve stable axial movement of the glue application adjustment assembly, making it convenient for operators to adjust the glue nozzle height according to actual needs, ensuring the glue nozzle and the internal thread height of the reducer housing cover are consistent, and improving the accuracy and uniformity of glue application. The connection of the sleeve limit bearing and the replaceable rotating sleeve assembly ensures the smooth rotation and coaxiality of the rotating sleeve assembly, making the glue application process more stable and reliable.

[0016] As an optimal implementation method of an internal thread sealant rotary coating machine, the glue nozzle includes a quick-connect fixed end, a limiting reinforcement rib and a glue coating end head; the interior of the quick-connect fixed end is hollow and a glue inlet is opened on the top, the quick-connect fixed end is connected to the glue delivery pipeline assembly, the glue coating end head is connected to the side wall of the quick-connect fixed end, the interior of the glue coating end head is hollow and a glue outlet is opened on the side, the glue coating end head and the interior of the quick-connect fixed end are connected to each other, the limiting reinforcement rib is connected to the outer wall of the quick-connect fixed end and is connected to the glue coating end head, and the limiting reinforcement rib and the glue coating end head can pass through the limiting hole of the glue nozzle.

[0017] The above-mentioned structural solution ensures that the nozzle works well with the glue adjustment assembly and the glue delivery pipeline assembly. The quick-connect fixing end facilitates quick connection to the glue delivery pipeline assembly, improving installation efficiency. The limiting reinforcement rib enhances the structural strength of the nozzle and also acts as a limiter when passing through the nozzle limiting hole, ensuring the nozzle's stable position during adjustment and glue application. The glue outlet at the glue application end allows the sealant to be extruded toward the internal thread surface, allowing it to be evenly applied to the internal thread surface of the reducer housing cover, improving the glue application effect and quality.

[0018] As a preferred implementation method of an internal thread sealant rotary coating machine, the replaceable rotary sleeve assembly includes a toothed rotary sleeve and a replaceable spline sleeve, the toothed rotary sleeve is rotatably installed inside the outer shell assembly, the replaceable spline sleeve is installed at the bottom of the toothed rotary sleeve, and the replaceable spline sleeve is installed in the sleeve limit bearing; the toothed rotary sleeve includes a rotary sleeve toothed protrusion, a rotary sleeve toothed groove and a rotary sleeve embedded magnet; the rotary sleeve toothed protrusion and the rotary sleeve toothed groove are staggered along the circumferential direction of the toothed rotary sleeve at the bottom of the toothed rotary sleeve, a rotary sleeve embedded magnet is embedded in each rotary sleeve toothed groove, and the replaceable spline sleeve is magnetically connected to the rotary sleeve embedded magnet.

[0019] The above-mentioned structural solution, with its toothed rotating sleeve and replaceable splined sleeve design within the replaceable rotating sleeve assembly, facilitates the replacement of splined sleeves of varying specifications to accommodate a wide variety of reducer housing covers. The toothed rotating sleeve's toothed protrusions and grooves, coupled with the replaceable splined sleeve, are connected to the replaceable splined sleeve, and combined with a magnetic connection, ensures a secure and stable connection while facilitating quick replacement. By replacing the replaceable splined sleeves with different specifications, the gluing machine can adapt to the input shaft dimensions of various reducer models, expanding its applicability to meet the gluing needs of various intermediate and final reducer housing covers, thereby improving the versatility of the equipment.

[0020] As a preferred implementation method of an internal thread sealant rotary coating machine, the replaceable spline sleeve includes a sleeve tooth embedding protrusion, a sleeve tooth embedding groove, a sleeve body, a bearing limit platform, an internal spline and a sleeve embedded magnet; the sleeve tooth embedding protrusion and the sleeve tooth embedding groove are staggeredly distributed on the top of the sleeve body along the circumferential direction, and the sleeve tooth embedding protrusion and the sleeve tooth embedding groove are staggeredly connected with the rotating sleeve tooth embedding groove and the rotating sleeve tooth embedding protrusion respectively; a sleeve embedded magnet is embedded in the top of each sleeve tooth embedding protrusion, and the sleeve embedded magnet can be magnetically connected to the rotating sleeve embedded magnet; the sleeve body is installed in the sleeve limit bearing, the bearing limit platform protrudes from the outer wall of the sleeve body along the circumferential direction, and the sleeve limit bearing abuts against the top of the bearing limit platform.

[0021] With the above-mentioned structural scheme, the sleeve tooth embedding protrusions and the sleeve tooth embedding grooves are staggeredly connected with the corresponding structures of the tooth embedding rotating sleeve, and the magnetic connection is cooperated to ensure that the replaceable spline sleeve will not loosen or fall off during the rotation process, thereby ensuring the stability of the gluing process; the cooperation between the bearing limit platform and the sleeve limit bearing plays a limiting and supporting role for the replaceable spline sleeve, ensuring its coaxiality with the reducer input shaft, making the gluing more uniform and accurate; the design of the internal spline facilitates connection with the reducer input shaft, ensuring that the replaceable spline sleeve and the reducer housing cover are relatively fixed during the operation of the gluing machine, thereby improving the gluing efficiency and quality.

[0022] As a preferred implementation method of an internal thread sealant rotary coating machine, the pneumatic control assembly includes an external air circuit quick-plug self-locking joint, a handle housing, a rocker, a rotatable air circuit joint, a throttle valve, a connecting air pipe, a pneumatic switch valve, and a reset spring; the external air circuit quick-plug self-locking joint is installed on the top of the handle housing, the pneumatic switch valve is installed inside the handle housing, and the output end of the external air circuit quick-plug self-locking joint is connected to the input end of the pneumatic switch valve; a rocker is installed on the handle housing by a bolt connection, and the rocker can rotate around the installation point, the top of the rocker is connected to one end of the reset spring, and the other end of the reset spring is fixed on the handle housing, and the bottom end of the rocker is connected to a trigger member extending into the handle housing, and the trigger member is in contact with the switch of the pneumatic switch valve; a rotatable air circuit joint is installed at the bottom of the handle housing. The rotatable air circuit joint is connected to the pneumatic switch valve through a connecting air pipe, the connecting air pipe is installed inside the handle housing, the rotatable air circuit joint is connected to the throttle valve, and the throttle valve is connected to the input end of the sealant supply assembly; the sealant supply assembly includes a glue supply inlet port, a glue supply end cover, a glue supply piston, a glue supply hose, a glue discharge end cover, a glue discharge port, and a glue discharge quick interface; the glue supply inlet port is fixedly connected to one end of the glue supply hose through the glue supply end cover, and the glue supply inlet port is connected to the throttle valve; the glue discharge port is fixedly connected to the other end of the glue supply hose through the glue discharge end cover, the glue discharge port is threadedly connected to the glue discharge quick interface, and the glue discharge quick interface is connected to the glue delivery pipeline assembly; a glue supply piston is movably installed in the glue supply hose, and the glue supply piston can move from the glue supply inlet port to the glue discharge port along the inner wall of the glue supply hose under the action of pneumatic force.

[0023] Adopting this structural solution, the pneumatic control assembly and sealant supply assembly achieve stable glue supply and extrusion. The pneumatic control assembly controls the on / off and flow rate of the air source, precisely controlling the amount of sealant extruded, solving the problem of difficult-to-control glue quantity during manual application. The sealant supply assembly's supply piston moves under the action of air pressure, ensuring that sealant is continuously and stably extruded from the nozzle, improving the continuity and stability of glue application. The combination of the two achieves automated glue supply and extrusion, reducing manual intervention and labor costs, improving work efficiency, and ensuring glue application quality.

[0024] The technical solution adopted by a gluing method of the present invention is as follows: A method for coating glue, using an internal thread sealant rotary coating machine as described in any one of the above items, comprising the following steps: S1. Load the soft-pack sealant into the sealant supply assembly and connect the pneumatic control assembly to the air source pipeline; S2. Select a replaceable rotating sleeve assembly that matches the reducer housing cover, rotate the replaceable rotating sleeve assembly to install it on the outer shell assembly, install the glue nozzle on the glue application adjustment assembly, and connect the glue nozzle to the glue delivery pipeline assembly; sleeve the replaceable rotating sleeve assembly onto the outside of the reducer input shaft in the middle of the reducer housing cover; move the glue application adjustment assembly on the outer shell assembly along the axial direction of the replaceable rotating sleeve assembly to adjust the height of the glue nozzle so that the height of the glue nozzle is consistent with that of the inner thread of the reducer housing cover; move the glue nozzle on the glue application adjustment assembly along the radial direction of the replaceable rotating sleeve assembly to adjust the gap between the glue nozzle and the inner thread surface of the reducer housing cover; S3. Turn on the pneumatic control assembly and supply air to the sealant supply assembly so that the soft-pack sealant in the sealant supply assembly is squeezed out from the nozzle through the glue delivery pipeline assembly under the action of air pressure. At the same time, rotate the bracket assembly to drive the glue nozzle to rotate around the axis of the replaceable rotating sleeve assembly as the center axis, and apply the soft-pack sealant to the internal thread surface of the reducer housing cover.

[0025] By adopting the above scheme, in the gluing method of the present invention, by selecting a suitable replaceable rotating sleeve assembly and accurately adjusting the position of the glue nozzle, it is possible to ensure that the gluing machine is compatible with reducer housing covers of different specifications, and ensure that the sealant is accurately applied to the internal thread surface; after turning on the pneumatic control assembly, the automated glue supply and extrusion process is combined with the rotary gluing method, so that the sealant can be applied continuously and evenly. Compared with manual gluing, the gluing efficiency and quality are greatly improved, the operator's action redundancy is reduced, the risk of product contamination by sealant is reduced, the cleanliness and quality of the product are guaranteed, and at the same time, the manual operation process is simplified and labor costs are reduced.

[0026] The beneficial effects of the present invention include: 1. The present invention integrates the pneumatic control assembly, sealant supply assembly, housing assembly and other components into the bracket assembly, constructing a complete glue supply, glue delivery and glue coating system.

[0027] 2. The replaceable rotating sleeve assembly in the present invention can rotate around its own axis relative to the outer shell assembly. The replaceable rotating sleeve assembly is used to be sleeved on the outside of the reducer input shaft. The replaceable rotating sleeve assembly is relatively fixed to the reducer shell cover during rotary glue coating. Therefore, when the internal thread sealant rotary glue coating machine of the present invention is held handheld for glue coating, the glue nozzle can rotate relative to the reducer shell cover and the reducer input shaft, thereby performing rotary glue coating and applying a continuous sealant layer on the internal thread surface of the reducer shell cover, which reduces the operating difficulty and labor cost, simplifies the work process, and improves work efficiency.

[0028] 3. The present invention adopts the air source pipeline to provide power. Compared with manual control of glue discharge, the power is stable and sustainable, the glue discharge amount is stable and uniform, which can ensure the consistency of glue amount and reduce the risk of airtightness failure.

[0029] 4. The glue nozzle in the present invention can move along the axial and radial directions of the replaceable rotating sleeve assembly, which is convenient for adjusting the height of the glue nozzle and the distance between the glue nozzle and the internal thread surface. It is convenient for applying and leveling at the same time, and can adapt to reducer housing covers of different specifications. There is no need for manual leveling, it is easy to ensure cleanliness requirements, there is no need for manual position adjustment, and the work process is simplified. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 This is a schematic diagram of the overall structure of an internal thread sealant rotary coating machine of the present invention; Figure 2 This is a schematic diagram of the structure of an internal thread sealant rotary coating machine in the present invention when coating the internal thread with glue. Figure 1 ; Figure 3 This is a schematic diagram of the structure of an internal thread sealant rotary coating machine in the present invention when coating the internal thread with glue. Figure 2 ; Figure 4 It is a schematic diagram of the three-dimensional structure of the pneumatic control assembly structure of the present invention; Figure 5 This is a schematic diagram of the internal structure of the pneumatic control assembly structure in the present invention. Figure 1 ; Figure 6 This is a schematic diagram of the internal structure of the pneumatic control assembly structure in the present invention. Figure 2 ; Figure 7 This is a schematic diagram of the three-dimensional structure of the handle housing in the present invention; Figure 8 Schematic diagram of the three-dimensional structure of the bracket assembly of the present invention; Figure 9 yes Figure 8 Schematic diagram of the cross-section of the structure at point A; Figure 10 It is a schematic diagram of the three-dimensional structure of the sealant supply assembly of the present invention; Figure 11 This is a schematic diagram of the three-dimensional structure of the glue supply and air inlet port in the present invention. Figure 1 ; Figure 12 This is a schematic diagram of the three-dimensional structure of the glue supply and air inlet port in the present invention. Figure 2 ; Figure 13It is a schematic diagram of the three-dimensional structure of the rubber delivery pipeline assembly in the present invention; Figure 14 This is a schematic diagram of the three-dimensional structure of the gluing adjustment assembly in the present invention. Figure 1 ; Figure 15 This is a schematic diagram of the three-dimensional structure of the gluing adjustment assembly in the present invention. Figure 2 ; Figure 16 This is a schematic diagram of the three-dimensional structure of the nozzle fixing block in the present invention. Figure 1 ; Figure 17 This is a schematic diagram of the three-dimensional structure of the nozzle fixing block in the present invention. Figure 2 ; Figure 18 This is a schematic diagram of the top view of the nozzle fixing block of the present invention; Figure 19 This is a schematic diagram of the three-dimensional structure of the upper and lower adjustment assembly in the present invention. Figure 1 ; Figure 20 This is a schematic diagram of the three-dimensional structure of the upper and lower adjustment assembly in the present invention. Figure 2 ; Figure 21 Schematic diagram of the top view of the upper and lower adjustment assembly of the present invention; Figure 22 This is a schematic diagram of the three-dimensional structure of the upper and lower adjustment blocks in the present invention. Figure 1 ; Figure 23 This is a schematic diagram of the top view of the upper and lower adjustment blocks in the present invention; Figure 24 This is a schematic diagram of the three-dimensional structure of the upper and lower adjustment blocks in the present invention. Figure 2 ; Figure 25 This is a schematic diagram of the three-dimensional structure of the left and right adjustment blocks in the present invention. Figure 1 ; Figure 26 This is a schematic diagram of the three-dimensional structure of the left and right adjustment blocks in the present invention. Figure 2 ; Figure 27 It is a schematic diagram of the three-dimensional structure of the housing assembly of the present invention; Figure 28 is an exploded view of the housing assembly of the present invention; Figure 29 It is a schematic diagram of the three-dimensional structure of the outer top cover of the present invention; Figure 30 It is a schematic diagram of the three-dimensional structure of the outer middle layer of the present invention; Figure 31 Schematic diagram of the three-dimensional structure of the outer bottom shell of the present invention; Figure 32 It is a schematic diagram of the three-dimensional structure of the replaceable rotating sleeve assembly of the present invention; Figure 33 This is a schematic diagram of the three-dimensional structure of the tooth-embedded rotary sleeve in the present invention. Figure 1 ; Figure 34 This is a schematic diagram of the three-dimensional structure of the tooth-embedded rotary sleeve in the present invention. Figure 2 ; Figure 35 This is a schematic diagram of the three-dimensional structure of the replaceable spline sleeve in the present invention. Figure 1 ; Figure 36 This is a schematic diagram of the three-dimensional structure of the replaceable spline sleeve in the present invention. Figure 2 ; Figure 37 It is a schematic diagram of the three-dimensional structure of the nozzle of the present invention; Figure 38 It is a side structural schematic diagram of the nozzle of the present invention.

[0032] Description of reference numerals: 1. Pneumatic control assembly; 1-1. External air line quick-connect self-locking connector; 1-2. Handle housing; 1-2-1. External air line connector mounting position; 1-2-2. Return spring mounting position; 1-2-3. Rocker mounting position; 1-2-4. Pneumatic switch mounting position; 1-2-5. Handle rotating shaft housing; 1-2-6. Rotating air line connector mounting position; 1-3. Rocker; 1-1-3. Trigger; 1-4. Rotatable air line connector; 1-5. Throttle valve; 1-6. Connecting air pipe; 1-7. Pneumatic switch valve; 1-8. Return spring; 2. Bracket assembly; 2-1. Portable lower bracket; 2-2. Portable upper bracket; 2-3. Air line upper bracket; 2-4. Air line lower bracket; 2-5. Air line bearing; 3. Sealant supply assembly; 3-1. Sealant supply inlet port; 3-1-1. O-ring; 3-1-2. Throttle valve internal thread; 3-1-3. Air outlet; 3-2. Sealant supply end cap; 3-3. Sealant supply piston; 3-4. Sealant supply hose; 3-5. Sealant outlet end cap; 3-6. Sealant outlet port; 3-7. Sealant outlet quick connector; 4. Rubber delivery pipeline assembly; 4-1. Rubber delivery hose; 4-2. Right-angle rubber delivery quick connector; 5. Outer shell assembly; 5-1. Outer top cover; 5-1-1. Outer top cover fixing flange; 5-1-2. Rotating sleeve limit stop edge; 5-1-3. Up and down adjustment limit protrusion; 5-1-4. Up and down adjustment hole; 5-2. Outer middle layer; 5-2-1. Rotating sleeve mounting position; 5-2-2. Up and down adjustment bolt mounting position; 5-2-3. Up and down adjustment limit groove; 5-3. Outer bottom shell; 5-3-1. Limit bearing mounting position; 5-3-2. Up and down adjustment block mounting position; 5-3-3. Up and down slideway mounting position; 5-3-4. Up and down limit groove; 5-4. Sleeve limit bearing; 5-5. Up and down adjustment slideway; 5-6. Up and down adjustment bolt; 6. Glue application adjustment assembly; 6-1. Adjustment assembly cover; 6-2. Glue nozzle fixing block; 6-2-1. Assembly cover limit protrusion; 6-2-2. Right-angle quick connector mounting position; 6-2-3. Quick connector fixing hole; 6-2-4. Left and right limit protrusions; 6-2-5. Fixing block fixing hole; 6-2-6. Assembly cover fixing hole; 6-3. Up and down adjustment assembly; 6-3-1. Up and down adjustment block; 6-3-1-1. Left and right limit grooves; 6-3-1-2. Left and right adjustment nut holes; 6-3-1-3. Up and down adjustment nut holes; 6-3-1-4. Left and right slideway mounting holes; 6-3 -1-5, nozzle limit hole; 6-3-1-6, left and right adjustment bolt hole; 6-3-1-7, return spring mounting hole; 6-3-1-8, upper and lower limit protrusions; 6-3-1-9, upper and lower slideway holes; 6-3-1-10, upper and lower adjustment bolt holes; 6-3-2, left and right adjustment slideways; 6-3-3, left and right return springs; 6-3-4, upper and lower adjustment nuts; 6-3-5, left and right adjustment nuts; 6-4, left and right adjustment bolts; 6-5, left and right adjustment blocks; 6-5-1, fixing block mounting hole; 6-5-2, left and right slideway holes; 6-5-3, nozzle mounting slot; 7. Replaceable rotating sleeve assembly; 7-1. Threaded rotating sleeve; 7-1-1. Rotating sleeve threaded protrusion; 7-1-2. Rotating sleeve threaded groove; 7-1-3. Rotating sleeve embedded magnet; 7-2. Replaceable splined sleeve; 7-2-1. Sleeve threaded protrusion; 7-2-2. Sleeve threaded groove; 7-2-3. Sleeve body; 7-2-4. Bearing stop; 7-2-5. Internal spline; 7-2-6. Sleeve embedded magnet; 8. Glue nozzle; 8-1. Quick-connect fixing end; 8-1-1. Glue inlet; 8-2. Limiting reinforcement rib; 8-3. Glue coating end; 8-3-1. Glue outlet. DETAILED DESCRIPTION

[0033] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the specific embodiments. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0034] Reference Figure 1-38 , this embodiment proposes a kind of internal thread sealant rotary coating machine, such as Figure 1 As shown, the internal thread sealant rotary coating machine includes a bracket assembly 2, on which are mounted a pneumatic control assembly 1, a sealant supply assembly 3 and a shell assembly 5, the output end of the pneumatic control assembly 1 is connected to the input end of the sealant supply assembly 3 to form a pneumatic passage for supplying glue; the output end of the sealant supply assembly 3 is connected to the input end of the glue delivery pipeline assembly 4, the output end of the glue delivery pipeline assembly 4 is mounted with a glue nozzle 8, the output end of the glue delivery pipeline assembly 4 is connected to the input end of the glue nozzle 8 to form a glue delivery passage; the shell assembly Assembly 5 is cylindrical, with a replaceable rotating sleeve assembly 7 coaxially mounted on the bottom end of the housing assembly. The replaceable rotating sleeve assembly 7 can rotate about its own axis within the housing assembly 5 and is designed to fit over the exterior of the reducer input shaft. A glue nozzle 8 is mounted on a glue adjustment assembly 6, which is mounted on one side of the housing assembly 5 and moves axially along the replaceable rotating sleeve assembly 7. The glue nozzle 8 can move radially along the replaceable rotating sleeve assembly 7 on the glue adjustment assembly 6. The pneumatic control assembly 1, bracket assembly 2, sealant supply assembly 3, glue delivery pipeline assembly 4, and housing assembly 5 together form a rotary sealant applicator for internally threaded sealants.

[0035] like Figure 4-9As shown, the pneumatic control assembly 1 includes an external air circuit quick-insert self-locking connector 1-1, a handle housing 1-2, a rocker 1-3, a rotatable air circuit connector 1-4, a throttle valve 1-5, a connecting air pipe 1-6, a pneumatic switch valve 1-7 and a reset spring 1-8. Among them, the handle housing 1-2 is two shell structures that are mirror images of each other, and the two shells are connected by bolts to form an integral structure. The handle housing 1-2 is provided with an external air circuit connector installation position 1-2-1, a pneumatic switch installation position 1-2-4, a rotating air circuit connector installation position 1-2-6, a rocker installation position 1-2-3 and a reset spring installation position 1-2-2, which are respectively used to install and fix the external air circuit quick-plug self-locking connector 1-1, the pneumatic switch valve 1-7, the rotatable air circuit connector 1-4, the rocker 1-3 and the reset spring 1-8. The lower part of the handle housing 1-2 is the handle rotating shaft housing 1-2-5, which is installed on the air circuit bearing 2-5 of the bracket assembly 2. The air circuit bearing 2-5 is used to fix the pneumatic control assembly 1. At the same time, the pneumatic control assembly 1 can rotate around the axis of the handle rotating shaft housing 1-2-5 on the bracket assembly 2.

[0036] Specifically, the output end of the external air circuit quick-plug self-locking connector 1-1 is connected to the input end of the pneumatic switch valve 1-7, the rotatable air circuit connector 1-4 is connected to the pneumatic switch valve 1-7 through the connecting air pipe 1-6, the connecting air pipe 1-6 is installed inside the handle rotating shaft housing 1-2-5, the rotatable air circuit connector 1-4 is connected to the throttle valve 1-5, and the throttle valve 1-5 is threadedly connected to the throttle valve internal thread 3-1-2 on the glue supply inlet port 3-1 at the input end of the sealant supply assembly 3. The rocker 1-3 is installed on the rocker mounting position 1-2-3 by bolt connection. The rocker 1-3 can rotate around the mounting point. The top of the rocker 1-3 is connected to one end of the reset spring 1-8, and the other end of the reset spring 1-8 is fixed on the reset spring mounting position 1-2-2. The bottom end of the rocker 1-3 is connected to the trigger member 1-3-1 extending into the interior of the handle housing 1-2, and the trigger member 1-3-1 is in contact with the switch of the pneumatic switch valve 1-7.

[0037] like Figure 8-9 As shown, the bracket assembly 2 includes a portable lower bracket 2-1, a portable upper bracket 2-2, an air path upper bracket 2-3, an air path lower bracket 2-4 and an air path bearing 2-5; the portable upper bracket 2-2 is fixedly connected to the portable lower bracket 2-1 and fixed to the sealant supply assembly 3, the portable lower bracket 2-1 is fixedly connected to the outer shell assembly 5, the air path lower bracket 2-4 is fixedly connected to the air path bracket 2-3 and fixed to the sealant supply assembly 3, two air path bearings 2-5 are fixed on the air path lower bracket 2-4, and the air path bearings 2-5 are used for the installation of the handle rotating shaft housing 1-2-5.

[0038] like Figure 10-12As shown, the sealant supply assembly 3 includes a sealant supply air inlet port 3-1, a sealant supply end cap 3-2, a sealant supply piston 3-3, a sealant supply tube 3-4, a sealant discharge end cap 3-5, a sealant discharge port 3-6, and a sealant discharge quick connector 3-7. The sealant supply air inlet port 3-1 includes an O-ring 3-1-1, a throttle valve internal thread 3-1-2, and an air outlet 3-1-3. Figure 10-13 As shown, the throttle valve internal thread 3-1-2 of the glue supply inlet port 3-1 is connected to the throttle valve 1-5. The O-ring 3-1-1 tightly fits the inner wall of the glue supply tube 3-4, ensuring the airtightness of the connection. The air outlet 3-1-3 is connected to the interior of the glue supply tube 3-4, allowing external high-pressure gas to enter the glue supply tube 3-4 through the pneumatic control assembly 1. The glue supply inlet port 3-1 is firmly fixed to one end of the glue supply tube 3-4 through the glue supply end cap 3-2. The glue supply inlet port 3-1 is connected to the throttle valve 1-5. The glue outlet port 3-6 is firmly fixed to the other end of the glue supply tube 3-4 through the glue outlet end cap 3-5. The output end of the glue outlet port 3-6 is threadedly connected to the glue outlet quick connector 3-7, which is connected to the glue delivery tube 4-1 of the glue delivery pipeline assembly 4. A glue supply piston 3-3 is movably installed in the glue supply pipe 3-4. The glue supply piston 3-3 can move from the glue supply air inlet port 3-1 to the glue outlet port 3-6 along the inner wall of the glue supply pipe 3-4 under the action of air force.

[0039] like Figure 13-18 As shown, the glue supply and delivery pipeline assembly 4 includes a glue supply hose 4-1 and a right-angle glue supply quick connector 4-2. One end of the glue supply hose 4-1 is connected to the glue outlet quick connector 3-7 at the output end of the sealant supply assembly 3, while the other end of the glue supply hose 4-1 is connected to one end of the right-angle glue supply quick connector 4-2. The right-angle glue supply quick connector 4-2 is fixedly mounted at a right-angle quick connector mounting position 6-2-2 on the nozzle fixing block 6-2 of the glue application adjustment assembly 6. The right-angle glue supply quick connector 4-2 is specifically located between the adjustment assembly cover 6-1 and the right-angle quick connector mounting position 6-2-2. The right-angle glue supply quick connector 4-2 is fixed to the nozzle fixing block 6-2 via a quick connector fixing hole 6-2-3. The other end of the right-angle glue supply quick connector 4-2 is connected to the glue inlet 8-1-1 at the top of the quick connector fixing end 8-1 of the glue nozzle 8, forming a passage for the sealant.

[0040] like Figure 14-28As shown, the glue application adjustment assembly 6 includes an adjustment assembly cover 6-1, a nozzle fixing block 6-2, a vertical adjustment assembly 6-3, left and right adjustment bolts 6-4, and a left and right adjustment block 6-5. The nozzle fixing block 6-2 includes an assembly cover stopper 6-2-1, a right-angle quick connector mounting position 6-2-2, quick connector fixing holes 6-2-3, left and right stopper 6-2-4, fixing block fixing holes 6-2-5, and assembly cover fixing holes 6-2-6. The vertical adjustment assembly 6-3 includes an vertical adjustment block 6-3-1, left and right adjustment guides 6-3-2, left and right return springs 6-3-3, vertical adjustment nuts 6-3-4, and left and right adjustment nuts 6-3-5. The vertical adjustment block 6-3-1 includes left and right limit grooves 6-3-1-1, left and right adjustment nut holes 6-3-1-2, upper and lower adjustment nut holes 6-3-1-3, left and right slideway mounting holes 6-3-1-4, nozzle limit holes 6-3-1-5, left and right adjustment bolt holes 6-3-1-6, return spring mounting holes 6-3-1-7, upper and lower limit protrusions 6-3-1-8, upper and lower slideway holes 6-3-1-9, and upper and lower adjustment bolt holes 6-3-1-10. The horizontal adjustment block 6-5 includes a fixed block mounting hole 6-5-1, left and right slideway holes 6-5-2, and a nozzle mounting groove 6-5-3.

[0041] The adjustment assembly cover 6-1 is mounted on the nozzle fixing block 6-2 via the assembly cover limiting protrusions 6-2-1. The nozzle fixing block 6-2 is then securely fastened to the assembly cover fixing holes 6-2-6 via bolts. The left and right limiting protrusions 6-2-4 of the nozzle fixing block 6-2 are mounted in the left and right limiting grooves 6-3-1-1 of the upper and lower adjustment block 6-3-1 in the upper and lower adjustment assembly 6-3. The nozzle fixing block 6-2 is then securely fastened to the left and right adjustment block 6-5 via the fixing block fixing holes 6-2-5 and the fixing block mounting holes 6-5-1 on the left and right adjustment block 6-5.

[0042] like Figure 19-24As shown, in the upper and lower adjustment block 6-3-1, the left and right adjustment nuts 6-3-5 are fixed in the left and right adjustment nut holes 6-3-1-2, the upper and lower adjustment nuts 6-3-4 are fixed in the upper and lower adjustment nut holes 6-3-1-3, four left and right adjustment slides 6-3-2 are fixed in the left and right slide mounting holes 6-3-1-4, and four left and right return springs 6-3-3 are fixed in the return spring mounting holes 6-3-1-7. The left and right slide holes 6-5-2 on the left and right adjustment block 6-5 are mounted together, and the return spring 6-3-3 contacts the left and right adjustment block 6-5. The left and right adjustment block 6-5, in turn, contacts the left and right adjustment bolts 6-4 installed in the left and right adjustment bolt holes 6-3-1-6. The left and right adjustment bolt holes 6-3-1-6 of the upper and lower adjustment block 6-3-1 are connected at a 90-degree angle to the left and right adjustment nut holes 6-3-1-2, thereby connecting the left and right adjustment bolts 6-4 and the left and right adjustment nuts 6-3-5. Thus, by adjusting the left and right adjustment bolts 6-4, combined with the action of the left and right return springs 6-3-3, the left and right adjustment block 6-5 can be controlled to move left and right within the upper and lower adjustment block 6-3-1, thereby driving the left and right movement of the nozzle fixing block 6-2 along the upper and lower adjustment assembly 6-3. This further drives the left and right movement of the adjustment assembly cover 6-1 and the right-angle glue delivery quick connector 4-2 along the upper and lower adjustment assembly 6-3, ultimately achieving left and right movement of the glue nozzle 8 within the glue application adjustment assembly 6. The up / down adjustment bolt hole 6-3-1-10 in the up / down adjustment block 6-3-1 is used to connect with the up / down adjustment bolt 5-6 on the housing assembly 5 and is connected to the up / down adjustment nut hole 6-3-1-3 at a 90-degree angle, thus connecting the up / down adjustment bolt 5-6 with the up / down adjustment nut 6-3-4. Thus, by adjusting the up / down adjustment bolt 5-6, the glue adjustment assembly 6 can be controlled to move up / down on the housing assembly 5, further achieving up / down movement of the glue nozzle 8 relative to the housing assembly 5. The glue nozzle stop hole 6-3-1-5 in the up / down adjustment block 6-3-1 and the glue nozzle mounting slot 6-5-3 on the left / right adjustment block 6-5 both serve to limit the position of the glue nozzle 8 during installation.

[0043] like Figure 27-32As shown, the housing assembly 5 includes an outer top cover 5-1, an outer middle layer 5-2, an outer bottom shell 5-3, a sleeve limit bearing 5-4, an up and down adjustment slide 5-5, and an up and down adjustment bolt 5-6. The housing assembly 5 is generally cylindrical and is coaxially arranged with the replaceable rotating sleeve assembly 7. The outer top cover 5-1, the outer middle layer 5-2, and the outer bottom shell 5-3 are connected in sequence up and down. The sleeve limit bearing 5-4 is installed inside the outer bottom shell 5-3 and is used to connect with the replaceable rotating sleeve assembly 7. The outer top cover 5-1 includes an outer top cover fixing flange 5-1-1, a rotating sleeve limit stop 5-1-2, an up and down adjustment limit protrusion 5-1-3, and an up and down adjustment hole 5-1-4. The outer middle layer 5-2 includes a rotating sleeve mounting position 5-2-1, an up and down adjustment bolt mounting position 5-2-2, and an up and down adjustment limit groove 5-2-3. The outer bottom shell 5-3 includes a limit bearing installation position 5-3-1, an upper and lower adjustment block installation position 5-3-2, an upper and lower slideway installation position 5-3-3 and an upper and lower limit groove 5-3-4.

[0044] The upper end surface of the outer top cover fixing flange 5-1-1 of the outer top cover 5-1 is tightly fitted with the lower end surface of the portable lower bracket 2-1. The upper and lower adjustment bolts 5-6 are installed at the upper and lower adjustment bolt installation position 5-2-2 of the outer middle layer 5-2. The upper and lower adjustment bolts 5-6 pass through the upper and lower adjustment bolt holes 6-3-1-10 of the upper and lower adjustment blocks 6-3-1 and are connected with the upper and lower adjustment nuts 6-3-4. The lower end surface of the upper and lower adjustment limit protrusions 5-1-3 of the outer top cover 5-1 is tightly fitted with the upper end surface of the upper and lower adjustment limit grooves 5-2-3 of the outer middle layer 5-2, and the upper and lower adjustment bolts 5-6 are sealed between the lower end surface of the upper and lower adjustment limit protrusions 5-1-3 and the upper and lower adjustment bolt installation position 5- 2-2 formed internal space, at this time, the upper and lower adjustment limit holes 5-1-4 of the outer top cover 5-1 and the upper and lower adjustment bolts 5-6 are in a straight line, use a 3mm hexagonal wrench, insert it into the upper and lower adjustment holes 5-1-4, and rotate the upper and lower adjustment bolts 5-6; at the same time, the rotation sleeve limit stop edge 5-1-2 of the outer top cover 5-1 is installed above the rotation sleeve installation position 5-2-1 of the outer middle layer 5-2, and at the same time, the toothed rotating sleeve 7-1 of the replaceable rotating sleeve assembly 7 is installed at the bottom of the rotating sleeve installation position 5-2-1, and there is a slight gap between the upper end surface of the toothed rotating sleeve 7-1 and the lower end surface of the rotating sleeve limit stop edge 5-1-2, which can ensure that the toothed rotating sleeve 7-1 is installed in the rotation sleeve installation position. The upper and lower adjustment blocks of the outer bottom shell 5-3 are fixed together by self-tapping screws. The lower end of the outer middle layer 5-2 is fixed to the upper end of the outer bottom shell 5-3 by self-tapping screws. The lower and upper adjustment block mounting positions 5-3-2 of the outer bottom shell 5-3 are provided with two upper and lower slide mounting positions 5-3-3 at the bottom and two upper and lower limit grooves 5-3-4 on the side. The upper and lower slide mounting positions 5-3-3 are used to fix the upper and lower adjustment slides 5-5. The upper and lower adjustment slides 5-5 pass through the upper and lower slide holes 6-3-1-9. The upper and lower adjustment slides 5-5 are connected to the upper and lower slide holes 6-3-1-9 by sliding up and down. The upper and lower limit grooves 5-3-4 are connected to the upper and lower adjustment blocks. The upper and lower limit protrusions 6-3-1-8 of the block 6-3-1 are connected together, and the upper and lower adjustment blocks 6-3-1 are limited to be installed on the outer bottom shell 5-3, and the upper and lower adjustment blocks 6-3-1 can only move up and down on the outer bottom shell 5-3 along the upper and lower limit grooves 5-3-4. Use a 3mm hexagonal wrench to insert it into the upper and lower adjustment holes 5-1-4, and rotate the upper and lower adjustment bolts 5-6 to achieve the upper and lower movement adjustment of the glue adjustment assembly 6 relative to the outer shell assembly 5; the sleeve limit bearing 5-4 is fixedly installed in the limit bearing installation position 5-3-1 at the lower end of the outer bottom shell 5-3, and the sleeve limit bearing 5-4 is installed together with the replaceable spline sleeve 7-2 in the replaceable rotating sleeve assembly 7.

[0045] like Figures 32-36As shown, the replaceable rotating sleeve assembly 7 includes a toothed rotating sleeve 7-1 and a replaceable splined sleeve 7-2. The toothed rotating sleeve 7-1 includes a rotating sleeve toothed protrusion 7-1-1, a rotating sleeve toothed groove 7-1-2, and a rotating sleeve embedded magnet 7-1-3. The replaceable splined sleeve 7-2 includes a sleeve toothed protrusion 7-2-1, a sleeve toothed groove 7-2-2, a sleeve body 7-2-3, a bearing stop 7-2-4, an internal spline 7-2-5, and a sleeve embedded magnet 7-2-6. The toothed rotating sleeve 7-1 is mounted within the rotating sleeve mounting position 5-2-1 and is free to rotate about its axis. The lower end surface of the toothed rotating sleeve 7-1 is staggered with five rotating sleeve toothed protrusions 7-1-1 and five rotating sleeve toothed grooves 7-1-2. A rotating sleeve embedded magnet 7-1-3 is fixedly embedded in each rotating sleeve toothed groove 7-1-2. The magnetic poles of the rotating sleeve embedded magnets 7-1-3 exposed on the outer end surface are all identical. The upper end surface of the replaceable spline sleeve 7-2 is staggered with five sleeve toothed protrusions 7-2-1 and five sleeve toothed grooves 7-2-2. A sleeve embedded magnet 7-2-6 is fixedly embedded in the top of each sleeve toothed protrusion 7-2-1. The magnetic poles of the sleeve embedded magnets 7-2-6 exposed on the outer end surface are all identical and opposite to the magnetic poles of the rotating sleeve embedded magnets 7-1-3. When the rotating sleeve toothed grooves 7-1-2, rotating sleeve toothed protrusions 7-1-1, sleeve toothed protrusions 7-2-1, and sleeve toothed grooves 7-2-2 are interlaced, each sleeve embedded magnet 7-2-6 is attracted to the corresponding rotating sleeve embedded magnet 7-1-3, flexibly connecting the replaceable spline sleeve 7-2 and the toothed rotating sleeve 7-1. The sleeve body 7-2-3 is installed in the sleeve limit bearing 5-4, and the sleeve limit bearing 5-4 is tightly fitted with the step of the bearing limit platform 7-2-4. The replaceable spline sleeve 7-2 can rotate in the sleeve limit bearing 5-4, while driving the toothed rotating sleeve 7-1 to rotate in the rotating sleeve mounting position 5-2-1. The internal spline 7-2-5 will change depending on the reducer housing cover and the place of use. Accordingly, manufacturing a new replaceable spline sleeve 7-2 can make the internal thread sealant rotary coating machine suitable for more reducer housing covers and scenarios.

[0046] like Figure 1 、 13 , 14, 15, 37 and Figure 38 As shown, the nozzle 8 includes a quick-connect fixing end 8-1, a limiting reinforcement rib 8-2, and a glue-applying end 8-3. The quick-connect fixing end 8-1 is connected to the right-angle glue delivery quick connector 4-2. The limiting reinforcement rib 8-2 passes through the nozzle limiting hole 6-3-1-5 and is installed in the nozzle mounting groove 6-5-3. The glue-applying end 8-3 may be modified according to different reducer housings and usage locations. By manufacturing new nozzles 8 accordingly, the internal thread sealant rotary glue applicator can be applied to a wider range of reducer housings and usage scenarios.

[0047] This embodiment also provides a gluing method, which specifically includes the following steps: Step 1. Before use, remove the glue end cap 3-5 and the glue outlet port 3-6, load the soft pack sealant into the glue supply hose 3-4, and replace the glue end cap 3-5 and the glue outlet port 3-6; connect the existing air source pipeline of the production line to the external air line quick plug self-locking connector 1-1 to complete the preparation work of filling the glue.

[0048] Step 2. Before use, according to the reducer housing cover produced by the production line, select the replaceable spline sleeve 7-2 that matches the input shaft in the middle of the reducer housing cover, insert it into the sleeve limit bearing 5-4, and make the sleeve tooth embedding protrusion 7-2-1 and the sleeve tooth embedding groove 7-2-2 of the replaceable spline sleeve 7-2 engage with the rotating sleeve tooth embedding groove 7-1-2 and the rotating sleeve tooth embedding protrusion 7-1-1 of the tooth-embedded rotating sleeve 7-1 respectively, so that the sleeve embedded magnet 7-2-6 and the rotating sleeve embedded magnet 7-1-3 are attracted to each other to ensure that the replaceable spline sleeve 7-2 is fixed on the housing assembly 5, and the matching and installation of the replaceable spline sleeve 7-2 and the input shaft in the middle of the reducer housing cover are completed; in combination with the process requirements of the width of the internal thread of the reducer housing cover and the amount of glue applied, align the limiting reinforcement rib 8-2 of the glue nozzle 8 with the glue nozzle limiting hole 6-3-1-5 and the glue nozzle installation groove 6-5-3, and quickly fix the glue nozzle 8 Insert the fixed end 8-1 into the right-angle glue delivery quick connector 4-1 to complete the matching of the reducer cover and the glue nozzle 8; make the internal spline 7-2-5 match the external spline of the main reducer input shaft, place the internal thread sealant rotary glue applicator on the input shaft in the middle of the reducer cover, use a 3mm hexagonal wrench in combination with the internal thread diameter of the reducer cover, insert it into the upper and lower adjustment holes 5-1-4, turn the upper and lower adjustment bolts 5-6, and then drive the upper and lower adjustment assembly 6-3 to adjust the entire upper and lower parts so that the glue end 8-3 of the glue nozzle 8 is consistent in height with the internal thread, loosen the butterfly nuts on the left and right adjustment bolts 6-4, use the hexagonal wrench to adjust the left and right adjustment bolts 6-4, and combine the action of the left and right return springs 6-3-3 to control the left and right adjustment of the left and right adjustment blocks 6-5 so that the glue end 8-3 of the glue nozzle 8 maintains an appropriate gap with the internal thread, completing the adaptive adjustment of the position of the reducer cover and the glue nozzle 8. When the production line switches the reducer housing cover, the internal thread sealant rotary coating machine can be quickly adapted to the production line reducer housing cover by quickly replacing the replaceable spline sleeve 7-2 and adjusting the position of the glue nozzle 8 according to the operation of step 2.

[0049] Step 3. When using, make the internal spline 7-2-5 match the external spline of the main reducer input shaft, place the internal thread sealant rotary coating machine on the reducer housing cover input shaft, hold the handle shell 1-2 with one hand, press the rocker 1-3 with your fingers, the rocker 1-3 can rotate around the installation point and contact with the pneumatic switch valve 1-7, by pressing the rocker 1-3 and using the "lever principle" to further press the pneumatic switch valve 1-7, the pneumatic switch valve 1-7 is now opened, and the high-pressure gas of the production line reaches the inside of the glue supply hose 3-4 through the external gas line quick-insert self-locking connector 1-1, the pneumatic switch valve 1-7, the connecting air pipe 1-6, the rotatable gas line connector 1-4, the throttle valve 1-5, and the glue supply inlet port 3-1, and the high-pressure gas enters The glue supply piston 3-3 is pushed in one step to extrude the soft-package sealant. The squeezed sealant flows through the glue outlet port 3-6, the glue outlet quick interface 3-7, the glue delivery pipe 4-1, and the right-angle glue delivery quick connector 4-2 to reach the inside of the glue nozzle 8, and a flat glue strip is discharged from the glue application end 8-3; while pressing the rocker 1-3, the handle housing 1-2 is shaken at a constant speed to drive the internal thread sealant rotary glue coating machine to rotate at a constant speed with the replaceable spline sleeve 7-2 as the central axis. At this time, the handle housing 1-2 rotates at a constant speed around the axis of the handle rotating shaft housing 1-2-5, and the glue application end 8-3 moves along the surface of the internal thread, thereby applying the extruded flat glue strip to the surface of the internal thread to form a uniform and continuous sealant layer.

[0050] Step 4. During use, the throttle valve 1-5 can be adjusted according to needs or process requirements to control the pressure of the high-pressure gas entering the glue supply pipe 3-4, thereby controlling the amount of glue supplied and realizing the function of controllable glue application; with the cooperation of the left and right return springs 6-3-3 and the left and right adjustment blocks 6-5, the glue nozzle 8 is protected to avoid collision between the glue nozzle 8 and the internal thread when operating according to step 3.

[0051] Step 5. As the internal thread sealant rotary coating machine rotates, apply the sealant evenly and continuously on the internal thread surface. When the coating end 8-3 is 15-20mm away from the starting point, release the pressure on the rocker 1-3. At this time, the rocker 1-3 returns to its initial position under the action of the reset spring 1-8. At this time, the rocker 1-3 no longer squeezes the pneumatic switch valve 1-7. The pneumatic switch valve 1-7 blocks the external high-pressure gas from entering the glue supply pipe 3-4. Continue to rotate the internal thread sealant rotary coating machine to use Use pneumatic control assembly 1 and the internal residual pressure of sealant supply assembly 3 to continue supplying glue, and release the internal residual pressure at the same time to avoid sealant flowing out when stopping work. When the glue application end 8-3 coincides with the starting point by 15-20mm, stop rotating, remove the internal thread sealant rotary glue coating machine and place it in the designated work station. At this time, a uniform and continuous sealant layer is formed on the surface of the internal thread, completing the glue application process. When performing glue application on reducer housing covers of the same specification, only steps three, four, and five need to be implemented.

[0052] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily 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 is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An internal thread sealant rotary coating machine, comprising a bracket assembly (2), characterized in that: The support assembly (2) is provided with a pneumatic control assembly (1), a sealant supply assembly (3) and a housing assembly (5), wherein the output end of the pneumatic control assembly (1) is connected to the input end of the sealant supply assembly (3) to form a pneumatic passage for supplying sealant; the output end of the sealant supply assembly (3) is connected to the input end of the sealant delivery pipeline assembly (4), and the output end of the sealant delivery pipeline assembly (4) is provided with a glue nozzle (8), and the output end of the sealant delivery pipeline assembly (4) is connected to the input end of the glue nozzle (8) to form a glue delivery passage; the housing assembly (5) is columnar, and the housing assembly (5) is provided with a pneumatic control assembly (1), a sealant supply assembly (3), a sealant supply assembly (4), a sealant supply assembly (3), a sealant supply assembly (4), a sealant supply assembly (4), a sealant supply assembly (8), a sealant supply ...3), a sealant supply assembly (4), a sealant supply assembly (4), a sealant supply assembly (8), a sealant supply passage; the housing assembly (5) is columnar, and the housing assembly (5) is provided with a pneumatic control assembly (1), a sealant supply assembly (3), a sealant supply assembly (3), a sealant supply assembly (4), a sealant supply assembly (4), a sealant supply assembly (8), a sealant supply passage; the housing assembly (5) is columnar, and the housing assembly (5) is provided with a pneumatic control assembly (1), a sealant supply assembly ( ) is coaxially mounted on the bottom end thereof with a replaceable rotating sleeve assembly (7), the replaceable rotating sleeve assembly (7) being capable of rotating about its own axis relative to the housing assembly (5), and the replaceable rotating sleeve assembly (7) being used to be sleeved on the outside of the input shaft of the reducer; the glue nozzle (8) is mounted on the glue coating adjustment assembly (6), the glue coating adjustment assembly (6) being movable along the axial direction of the replaceable rotating sleeve assembly (7) and being mounted on one side of the housing assembly (5), and the glue nozzle (8) being capable of moving along the radial direction of the replaceable rotating sleeve assembly (7) on the glue coating adjustment assembly (6).

2. The internal thread sealant rotary coating machine according to claim 1, characterized in that: The glue coating adjustment assembly (6) comprises an adjustment assembly cover (6-1), a glue nozzle fixing block (6-2), an upper and lower adjustment assembly (6-3), a left and right adjustment bolt (6-4) and a left and right adjustment block (6-5); the adjustment assembly cover (6-1) is fixed to the top of the glue nozzle fixing block (6-2), the glue nozzle fixing block (6-2) is connected to the glue nozzle (8), and the glue nozzle fixing block (6-2) is installed on the left and right adjustment block (6-5); the left and right adjustment block (6-5) is movably installed on the upper and lower adjustment assembly (6-3), and the movement path of the left and right adjustment block (6-5) is along the replaceable rotating sleeve assembly. (7); the upper and lower adjustment assembly (6-3) is installed on one side of the housing assembly (5) along the axial movement of the replaceable rotating sleeve assembly (7); the left and right adjustment bolts (6-4) are threadedly connected to the upper and lower adjustment assembly (6-3), and the axial direction of the left and right adjustment bolts (6-4) is arranged along the radial direction of the replaceable rotating sleeve assembly (7); one end of the left and right adjustment bolts (6-4) is in contact with the left and right adjustment blocks (6-5), and the left and right adjustment blocks (6-5) can be moved along the radial direction of the replaceable rotating sleeve assembly (7) by rotating the left and right adjustment bolts (6-4).

3. The internal thread sealant rotary coating machine according to claim 2, characterized in that: The up-down adjustment assembly (6-3) comprises an up-down adjustment block (6-3-1), a left-right adjustment slideway (6-3-2), a left-right return spring (6-3-3), an up-down adjustment nut (6-3-4) and a left-right adjustment nut (6-3-5); the up-down adjustment block (6-3-1) is axially movable along the replaceable rotating sleeve assembly (7) and is mounted on one side of the housing assembly (5); the up-down adjustment block (6-3-1) is fixedly connected to the up-down adjustment nut (6-3-4) on a side close to the housing assembly (5); the axial direction of the up-down adjustment nut (6-3-4) is arranged parallel to the axial direction of the replaceable rotating sleeve assembly (7); the up-down adjustment nut (6-3-4) and the housing assembly (5) are connected by an upper The upper and lower adjustment blocks (6-3-1) are fixedly connected to the left and right adjustment nuts (6-3-5) on a side away from the housing assembly (5), and the left and right adjustment nuts (6-3-5) are threadedly connected to the left and right adjustment bolts (6-4); the left and right adjustment slideways (6-3-2) are arranged in the upper and lower adjustment blocks (6-3-1) along the radial direction of the replaceable rotating sleeve assembly (7), and the left and right adjustment blocks (6-5) are slidably mounted on the left and right adjustment slideways (6-3-2); one end of the left and right return springs (6-3-3) is mounted on the upper and lower adjustment blocks (6-3-1), and the other end of the left and right return springs (6-3-3) is mounted on the left and right adjustment blocks (6-5).

4. The internal thread sealant rotary coating machine according to claim 3, characterized in that: The upper and lower adjustment block (6-3-1) includes left and right limit grooves (6-3-1-1), left and right adjustment nut holes (6-3-1-2), upper and lower adjustment nut holes (6-3-1-3), left and right slideway mounting holes (6-3-1-4), nozzle limit holes (6-3-1-5), left and right adjustment bolt holes (6-3-1-6), return spring mounting holes (6-3-1-7), upper and lower limit protrusions (6-3-1-8), upper and lower slideway holes (6-3-1-9) and upper and lower adjustment bolt holes (6-3-1-10); The upper and lower adjustment blocks (6-3-1) are provided with left and right limiting grooves (6-3-1-1), and the glue nozzle (8) passes through the left and right limiting grooves (6-3-1-1) and is connected to the left and right adjustment blocks (6-5); The left and right adjustment nut holes (6-3-1-2) and the left and right adjustment bolt holes (6-3-1-6) are formed on a side of the upper and lower adjustment blocks (6-3-1) away from the housing assembly (5); the left and right adjustment nut holes (6-3-1-2) and the left and right adjustment bolt holes (6-3-1-6) are connected at 90 degrees; the left and right adjustment nuts (6-3-5) are fixedly installed in the left and right adjustment nut holes (6-3-1-2); the left and right adjustment bolt holes (6-3-1-6) are threadedly connected to the left and right adjustment bolts (6-4); and the left and right adjustment bolt holes (6-3-1-6) are connected to the left and right limiting grooves (6-3-1-1); The upper and lower adjustment block (6-3-1) is provided with an upper and lower adjustment nut hole (6-3-1-3) and an upper and lower adjustment bolt hole (6-3-1-10) on a side close to the housing assembly (5); the upper and lower adjustment nut hole (6-3-1-3) and the upper and lower adjustment bolt hole (6-3-1-10) are connected at 90 degrees; the upper and lower adjustment nut (6-3-4) is fixedly installed in the upper and lower adjustment nut hole (6-3-1-3); and the upper and lower adjustment bolt hole (6-3-1-10) is threadedly connected to the upper and lower adjustment bolt (5-6); The left and right slideway mounting holes (6-3-1-4) are in communication with the left and right limiting grooves (6-3-1-1), and the left and right slideway mounting holes (6-3-1-4) are used to mount the left and right adjustment slideways (6-3-2); the left and right limiting grooves (6-3-1-1) are provided with the return spring mounting hole (6-3-1-7) on one side of the inner wall close to the housing assembly (5), and the return spring mounting hole (6-3-1-7) is coaxial with the left and right slideway mounting holes (6-3-1-4), and the return spring mounting hole (6-3-1-7) is used to mount the left and right return springs (6-3-3); The bottom of the left and right limiting grooves (6-3-1-1) is provided with the nozzle limiting hole (6-3-1-5), and the nozzle (8) can move in the nozzle limiting hole (6-3-1-5) along the axial direction of the left and right adjusting bolts (6-4); The side walls of the upper and lower adjustment blocks (6-3-1) are provided with upper and lower limit protrusions (6-3-1-8), and the upper and lower limit protrusions (6-3-1-8) are provided with upper and lower slideway holes (6-3-1-9) arranged along the axial direction of the replaceable rotating sleeve assembly (7).

5. The internal thread sealant rotary coating machine according to claim 4, characterized in that: The housing assembly (5) comprises an outer top cover (5-1), an outer middle layer (5-2), an outer bottom shell (5-3), a sleeve limit bearing (5-4), an upper and lower adjustment slideway (5-5) and an upper and lower adjustment bolt (5-6). The outer top cover (5-1), the outer middle layer (5-2) and the outer bottom shell (5-3) are connected in sequence from top to bottom; the outer bottom shell (5-3) is connected to the upper and lower adjustment slideway (5-5), the upper and lower adjustment slideway (5-5) passes through the upper and lower slideway holes (6-3-1-9), and the upper and lower adjustment slideway (5-5) is connected to the upper and lower adjustment slideway (5-5). ) is slidably connected to the upper and lower slideway holes (6-3-1-9); the outer middle layer (5-2) is threadedly connected to the upper and lower adjustment bolts (5-6), the upper and lower adjustment bolts (5-6) pass through the upper and lower adjustment bolt holes (6-3-1-10), and the upper and lower adjustment bolts (5-6) are threadedly connected to the upper and lower adjustment nuts (6-3-4); the sleeve limit bearing (5-4) is installed inside the outer bottom shell (5-3), and the sleeve limit bearing (5-4) is used to connect with the replaceable rotating sleeve assembly (7).

6. The internal thread sealant rotary coating machine according to claim 4, characterized in that: The glue nozzle (8) includes a quick-connect fixed end (8-1), a limiting reinforcement rib (8-2) and a glue-spreading end head (8-3); the quick-connect fixed end (8-1) is hollow inside and has a glue inlet (8-1-1) on the top; the quick-connect fixed end (8-1) is connected to the glue delivery pipeline assembly (4); the glue-spreading end head (8-3) is connected to the side wall of the quick-connect fixed end (8-1); the glue-spreading end head (8-3) is hollow inside and has a glue outlet (8-3-1) on the side; the glue-spreading end head (8-3) and the inside of the quick-connect fixed end (8-1) are mutually connected; the limiting reinforcement rib (8-2) is connected to the outer wall of the quick-connect fixed end (8-1) and is connected to the glue-spreading end head (8-3); the limiting reinforcement rib (8-2) and the glue-spreading end head (8-3) can pass through the glue nozzle limiting hole (6-3-1-5).

7. The internal thread sealant rotary coating machine according to claim 5, characterized in that: The replaceable rotating sleeve assembly (7) comprises a tooth-embedded rotating sleeve (7-1) and a replaceable spline sleeve (7-2), wherein the tooth-embedded rotating sleeve (7-1) is rotatably mounted inside the housing assembly (5), and the replaceable spline sleeve (7-2) is mounted on the bottom of the tooth-embedded rotating sleeve (7-1), and the replaceable spline sleeve (7-2) is mounted in the sleeve limit bearing (5-4); The tooth-embedded rotating sleeve (7-1) comprises a rotating sleeve tooth-embedded protrusion (7-1-1), a rotating sleeve tooth-embedded groove (7-1-2) and a rotating sleeve embedded magnet (7-1-3); the rotating sleeve tooth-embedded protrusion (7-1-1) and the rotating sleeve tooth-embedded groove (7-1-2) are staggeredly distributed at the bottom of the tooth-embedded rotating sleeve (7-1) along the circumferential direction of the tooth-embedded rotating sleeve (7-1), one rotating sleeve embedded magnet (7-1-3) is embedded in each rotating sleeve tooth-embedded groove (7-1-2), and the replaceable spline sleeve (7-2) is magnetically connected to the rotating sleeve embedded magnet (7-1-3).

8. The internal thread sealant rotary coating machine according to claim 7, characterized in that: The replaceable spline sleeve (7-2) comprises a sleeve tooth embedding protrusion (7-2-1), a sleeve tooth embedding groove (7-2-2), a sleeve body (7-2-3), a bearing limiter (7-2-4), an internal spline (7-2-5) and a sleeve embedded magnet (7-2-6); the sleeve tooth embedding protrusion (7-2-1) and the sleeve tooth embedding groove (7-2-2) are staggeredly distributed on the top of the sleeve body (7-2-3) along the circumferential direction, and the sleeve tooth embedding protrusion (7-2-1) and the sleeve tooth embedding groove (7-2-2) are respectively aligned with the rotating sleeve tooth embedding groove (7-1-2) and the rotating sleeve tooth embedding groove (7-1-2). The sleeve tooth embedding protrusions (7-1-1) are staggered and connected; the top of each sleeve tooth embedding protrusion (7-2-1) is embedded with a sleeve embedded magnet (7-2-6), and the sleeve embedded magnet (7-2-6) can be magnetically connected with the rotating sleeve embedded magnet (7-1-3); the sleeve body (7-2-3) is installed in the sleeve limit bearing (5-4), the bearing limit platform (7-2-4) protrudes from the outer wall of the sleeve body (7-2-3) in the circumferential direction, and the sleeve limit bearing (5-4) abuts against the top of the bearing limit platform (7-2-4).

9. The internal thread sealant rotary coating machine according to claim 1, characterized in that: The pneumatic control assembly (1) comprises an external air circuit quick-insert self-locking connector (1-1), a handle housing (1-2), a rocker (1-3), a rotatable air circuit connector (1-4), a throttle valve (1-5), a connecting air pipe (1-6), a pneumatic switch valve (1-7), and a reset tension spring (1-8); the external air circuit quick-insert self-locking connector (1-1) is mounted on the top of the handle housing (1-2), the pneumatic switch valve (1-7) is mounted inside the handle housing (1-2), and the output end of the external air circuit quick-insert self-locking connector (1-1) is connected to the input end of the pneumatic switch valve (1-7); the rocker (1-3) is mounted on the handle housing (1-2) by bolt connection, the rocker (1-3) can rotate around the mounting point, and the top end of the rocker (1-3) is connected to the reset tension spring ( The handle housing (1-2) is connected to one end of the reset spring (1-8), the other end of the reset spring (1-8) is fixed on the handle housing (1-2), the bottom end of the rocker (1-3) is connected to a trigger member (1-3-1) extending into the interior of the handle housing (1-2), and the trigger member (1-3-1) contacts the switch of the pneumatic switch valve (1-7); a rotatable air circuit connector (1-4) is installed at the bottom of the handle housing (1-2), the rotatable air circuit connector (1-4) and the pneumatic switch valve (1-7) are connected via the connecting air pipe (1-6), the connecting air pipe (1-6) is installed inside the handle housing (1-2), the rotatable air circuit connector (1-4) is connected to the throttle valve (1-5), and the throttle valve (1-5) is connected to the input end of the sealant supply assembly (3); The sealant supply assembly (3) comprises a sealant supply air inlet port (3-1), a sealant supply end cover (3-2), a sealant supply piston (3-3), a sealant supply tube (3-4), a sealant discharge end cover (3-5), a sealant discharge port (3-6), and a sealant discharge quick connector (3-7); the sealant supply air inlet port (3-1) is fixedly connected to one end of the sealant supply tube (3-4) through the sealant supply end cover (3-2), the sealant supply air inlet port (3-1) is connected to the throttle valve (1-5); the sealant discharge port (3-6) is fixedly connected to the sealant discharge port (3-7) through the sealant discharge end cover (3-5). The glue end cap (3-5) is fixedly connected to the other end of the glue supply tube (3-4); the glue outlet port (3-6) is threadedly connected to the glue outlet quick interface (3-7); and the glue outlet quick interface (3-7) is connected to the glue delivery pipeline assembly (4); the glue supply piston (3-3) is movably installed in the glue supply tube (3-4); the glue supply piston (3-3) can move from the glue supply air inlet port (3-1) to the glue outlet port (3-6) along the inner wall of the glue supply tube (3-4) under the action of pneumatic force.

10. A method for coating glue, characterized in that: A rotary coating machine for internal thread sealant as claimed in any one of claims 1 to 8 is used, comprising the following steps: S1, loading the soft-pack sealant into the sealant supply assembly (3), and connecting the pneumatic control assembly (1) to the air source pipeline; S2. Select the replaceable rotating sleeve assembly (7) matched with the reducer housing cover, rotate and install the replaceable rotating sleeve assembly (7) on the outer shell assembly (5), install the glue nozzle (8) on the glue adjustment assembly (6), and connect the glue nozzle (8) with the glue delivery pipeline assembly (4); sleeve the replaceable rotating sleeve assembly (7) on the outside of the reducer input shaft in the middle of the reducer housing cover; move the glue adjustment assembly (6) on the outer shell assembly (5) along the replaceable rotating sleeve assembly (7) axially, thereby adjusting the height of the glue nozzle (8) so that the height of the glue nozzle (8) is consistent with that of the inner thread of the reducer housing cover; move the glue nozzle (8) on the glue adjustment assembly (6) along the radial direction of the replaceable rotating sleeve assembly (7), thereby adjusting the gap between the glue nozzle (8) and the inner thread surface of the reducer housing cover; S3, turning on the pneumatic control assembly (1) and supplying air to the sealant supply assembly (3), so that the soft-pack sealant in the sealant supply assembly (3) is squeezed out from the glue nozzle (8) through the glue delivery pipeline assembly (4) under the action of air pressure, and at the same time rotating the bracket assembly (2) to drive the glue nozzle (8) to perform a rotary motion with the axis of the replaceable rotating sleeve assembly (7) as the central axis, so as to apply the soft-pack sealant to the inner thread surface of the reducer housing cover.

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