Distance adjustment mechanism of spray gun assembly of coating machine

Abstract

The invention discloses a distance adjusting mechanism for a spray gun assembly of a coating machine, and relates to the technical field of pharmaceuticals. In order to solve the problem that the existing distance adjusting mechanism is laborious, the distance adjusting mechanism comprises a base, a handle driving assembly and a transmission assembly arranged on the base, and the input end of the transmission assembly is connected with the output end of the handle driving assembly, the telescopic assembly comprises a transmission shaft, a rotating shaft and a bevel gear set for connecting the transmission shaft and the rotating shaft, the input end of the transmission shaft is connected with the output end of the transmission assembly, the input end of the rotating shaft is provided with a needle bearing assembly, the needle bearing assembly is connected with the base, the outer periphery of the rotating shaft is sleeved with a sliding shaft, the rotating shaft and the sliding shaft are slidably connected by a trapezoidal thread, the outer periphery of the sliding shaft is provided with a supporting seat connected with the needle bearing assembly, a sliding groove extending along the axial direction is provided in the supporting seat, a stud type roller bearing sliding along the sliding groove is provided on the sliding shaft, and the bottom end of the sliding shaft is connected with the spray gun assembly.

Description

Technical Field

[0001] The invention relates to the field of pharmaceutical technology, and more particularly to a distance adjustment mechanism for a spray gun assembly of a coating machine. Background Art

[0002] The coating machine is an efficient, energy-saving, safe and clean mechatronic equipment that can coat tablets, pills, candies, etc. with organic film, water-soluble film, slow-release and controlled-release coatings. When coating tablets, the distance between the spray gun assembly and the tablet bed must be adjustable. There are generally three ways to adjust the distance between the spray gun assembly and the tablet bed: one is to manually adjust the spray gun sliding block inside the coating pot; one is to adjust the coating pot by electric or air cylinder drive; the other is to adjust the coating pot mechanically outside the pot body, which is more reliable and safer.

[0003] The first solution is very laborious and not labor-saving, especially when small batches are being produced. Since the distance between the spray gun assembly and the tablet bed is greater than the size of the pot mouth, the spray gun assembly cannot be pulled out of the pot body. In this way, the operator needs to reach into the coating pot to adjust the spray gun assembly, which is very inconvenient and will also affect the coating environment. Although the second solution is labor-saving to adjust, since the electric cylinder or air cylinder is in the coating machine pot body, it will be restricted by hygiene, temperature, cleaning environment and dust environment. The selection requirements for electric cylinders and air cylinders are relatively strict and need to meet sanitary requirements. They also need to be completely sealed to prevent dust and water from entering the electric cylinders and air cylinders. In addition, once the electric cylinder or air cylinder fails, if there is no self-locking protection, the distance from the spray gun to the tablet bed will change. If it is in the coating environment, safety problems will occur, and it will also affect the quality of the product. It is also inconvenient to disassemble, inspect and maintain. The third solution can make up for the defects of the second solution, but it has the disadvantage of being laborious.

[0004] Therefore, how to solve the problem of the laboriousness of the existing distance adjustment mechanism is an urgent problem to be solved by those skilled in the art. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a distance adjustment mechanism for a coating machine spray gun assembly, which can adjust the distance between the spray gun assembly and the tablet bed outside the coating pot, does not require electric cylinder or cylinder drive, is convenient for operation and maintenance, is simple to select, and most importantly, saves labor.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A distance adjustment mechanism for a coating machine spray gun assembly, comprising:

[0008] Pedestal;

[0009] A handle driving assembly is arranged on the base;

[0010] A transmission assembly is arranged on the base, and an input end of the transmission assembly is connected to an output end of the handle drive assembly;

[0011] The telescopic assembly includes a transmission shaft, a rotating shaft and a bevel gear group for connecting the transmission shaft and the rotating shaft. The input end of the transmission shaft is connected to the output end of the transmission assembly. The input end of the rotating shaft is provided with a needle bearing assembly. The needle bearing assembly is connected to the base. The outer peripheral sleeve of the rotating shaft is provided with a sliding shaft. The rotating shaft and the sliding shaft are slidingly connected by a trapezoidal thread. The outer periphery of the sliding shaft is provided with a support seat connected to the needle bearing assembly. A sliding groove extending along the axial direction is provided in the support seat. The sliding shaft is provided with a stud roller bearing that slides along the sliding groove. The bottom end of the sliding shaft is connected to the spray gun assembly.

[0012] Preferably, the bottom end of the sliding shaft is connected to the spray gun bracket, and the spray gun bracket is used to connect the spray gun assembly. The end of the sliding shaft close to the spray gun bracket is provided with a linear bearing and a grid ring. The grid ring is located below the linear bearing, and the linear bearing is fixed in the support seat. The grid ring is fixed to the support seat through a mounting sleeve.

[0013] Preferably, two stud type roller bearings are provided, and the two stud type roller bearings are symmetrically arranged on the sliding shaft.

[0014] Preferably, the needle bearing assembly includes two needle bearings, the needle bearings are arranged on the rotating shaft through a bearing mounting seat, the needle bearings are limited by a copper sleeve and a first retaining ring, and the support seat is connected to the base through the bearing mounting seat.

[0015] Preferably, the base includes a bevel gear housing, a shaft cylinder and a fixed frame, the bevel gear group is arranged in the bevel gear housing, the transmission assembly is arranged in the shaft cylinder, the handle drive assembly is arranged on the fixed frame, and a removable inspection door is provided on the top of the bevel gear housing, the bottom end surface of the bevel gear housing is connected to the bearing mounting seat, one side surface of the bevel gear housing is connected to one end of the shaft cylinder, and the other end of the shaft cylinder is connected to the fixed frame.

[0016] Preferably, the transmission assembly includes a connecting shaft rotatably arranged in a shaft cylinder, the input end of the connecting shaft is connected to the output end of the handle drive assembly through a universal joint, the output end of the connecting shaft is connected to the input end of the transmission shaft through a connecting sleeve, and both the connecting shaft and the transmission shaft are key-connected to the connecting sleeve.

[0017] Preferably, two first deep groove ball bearings are provided on the transmission shaft, the first deep groove ball bearings are arranged on the transmission shaft through a first bearing mounting support, the shaft cylinder is connected to one side of the bevel gear housing through the first bearing mounting support, and a second retaining ring is provided at the end of the first deep groove ball bearing.

[0018] Preferably, sealing rings are provided between the bevel gear housing and the inspection door, the bearing mounting seat, and the first bearing mounting support, and a sealing ring is also provided between the shaft cylinder and the first bearing mounting support.

[0019] Preferably, the handle drive assembly includes a handle and a handwheel connected to the handle, the middle part of the handwheel is connected to the drive shaft, the output end of the drive shaft is connected to the input end of the connecting shaft through a universal joint, two second deep groove ball bearings are sleeved on the drive shaft, the second deep groove ball bearings are arranged on the drive shaft through a second bearing mounting support, the second bearing mounting support is fixed to the fixed frame, and a third retaining ring is provided at the end of the second deep groove ball bearing.

[0020] Preferably, a limit pin is provided on the handwheel, the limit pin is installed on the handwheel through a limit seat, the limit pin is slidably arranged along the limit seat, and the limit pin is insertable and removable in a limit groove on the second bearing mounting support.

[0021] The distance adjustment mechanism of the coating machine spray gun assembly provided by the present invention includes a base, a handle drive assembly, a transmission assembly and a telescopic assembly. Specifically, the handle drive assembly and the transmission assembly are both arranged on the base, and the input end of the transmission assembly is connected with the output end of the handle drive assembly. The handle drive assembly is provided for inputting power, and the power input by the handle drive assembly is transmitted to the next structure through the transmission assembly. The telescopic assembly includes a transmission shaft, a rotating shaft and a bevel gear group for connecting the transmission shaft and the rotating shaft. The input end of the transmission shaft is connected with the output end of the transmission assembly. The transmission assembly transmits power to the transmission shaft of the telescopic assembly, and then transmits power to the rotating shaft through the bevel gear group. A needle bearing assembly is provided at the input end of the rotating shaft. By providing the needle bearing assembly, the friction force when the rotating shaft rotates can be reduced to achieve a labor-saving technical effect. The rotating shaft is the main force-bearing component. The needle bearing assembly has a higher radial bearing capacity, high strength and is not easy to be damaged.

[0022] The outer periphery of the rotating shaft is provided with a sliding shaft, and the rotating shaft and the sliding shaft are slidably connected by a trapezoidal thread, and the outer periphery of the sliding shaft is provided with a supporting seat connected to the needle bearing assembly, and the sliding shaft is slidably connected to the supporting seat by a stud type roller bearing, and the supporting seat is fixed on the needle bearing assembly, and the needle bearing assembly is connected to the base, that is, the supporting seat is fixed, and when the rotating shaft rotates, the sliding shaft will also rotate accordingly, but a sliding groove extending along the axial direction is provided in the supporting seat, and a stud type roller bearing sliding along the sliding groove is provided on the sliding shaft. Since the stud type roller bearing is installed on the sliding shaft, the stud type roller bearing slides along the sliding groove of the support seat, and the support seat is fixed, thus limiting the rotation of the sliding shaft, so that the sliding shaft can only slide along the sliding groove, and the bottom end of the sliding shaft is connected to the spray gun assembly, and the spray gun assembly realizes telescopic reciprocating motion with the sliding shaft, and no rotation occurs during the telescopic process. By arranging the stud type roller bearing, the sliding resistance can be reduced, thereby achieving a labor-saving technical effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0024] Figure 1 A diagram showing the use of the distance adjustment mechanism of the coating machine spray gun assembly provided by the present invention;

[0025] Figure 2 A cross-sectional view of the distance adjustment mechanism of the coating machine spray gun assembly provided by the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the telescopic assembly provided by the present invention;

[0027] Figure 4 A partial cross-sectional view of the telescopic assembly provided by the present invention;

[0028] Figure 5 Another partial cross-sectional view of the telescopic assembly provided by the present invention;

[0029] Figure 6 Another partial enlarged view of the telescopic assembly provided by the present invention;

[0030] Figure 7 This is a cross-sectional view of the handle drive assembly provided by the present invention.

[0031] Reference numerals:

[0032] 100-coating pan;

[0033] 1-base, 101-bevel gear housing, 102-shaft cylinder, 103-fixed frame, 104-inspection door;

[0034] 2-handle drive assembly, 21-handle, 22-handwheel, 23-drive shaft;

[0035] 3-transmission assembly, 31-connecting shaft, 32-universal joint, 33-connecting sleeve;

[0036] 4- telescopic assembly, 41- transmission shaft, 42- rotating shaft, 43- bevel gear set, 44- sliding shaft, 45- support seat, 46- stud type roller bearing;

[0037] 5-needle bearing assembly, 51-needle bearing, 52-bearing mounting seat, 53-copper sleeve, 54-first retaining ring;

[0038] 6-Spray gun bracket;

[0039] 7-Linear bearing;

[0040] 8-Gray Circle;

[0041] 9-installation sleeve;

[0042] 10-first deep groove ball bearing;

[0043] 11-first bearing mounting support;

[0044] 12- second retaining ring;

[0045] 13- sealing ring;

[0046] 14-second deep groove ball bearing;

[0047] 15-second bearing mounting support, 151-limiting groove;

[0048] 16- third retaining ring;

[0049] 17-limit pin;

[0050] 18-limited seat;

[0051] 19-Rotation drive assembly. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] It should be noted that the directional words such as "upper" and "lower" mentioned below are defined based on the drawings in the specification.

[0055] The core of the present invention is to provide a distance adjustment mechanism for a coating machine spray gun assembly, which can adjust the distance between the spray gun assembly and the tablet bed outside the coating pot 100, does not require electric cylinder or air cylinder drive, is convenient for operation and maintenance, is simple to select, and most importantly, saves labor.

[0056] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A distance adjustment mechanism of a coating machine spray gun assembly includes a base 1, a handle driving assembly 2, a transmission assembly 3 and a telescopic assembly 4.

[0057] Specifically, the handle drive assembly 2 and the transmission assembly 3 are both arranged on the base 1, and the input end of the transmission assembly 3 is connected to the output end of the handle drive assembly 2. The handle drive assembly 2 is set to input power, and the power input by the handle drive assembly 2 is transmitted to the next structure through the transmission assembly 3. The telescopic assembly 4 includes a transmission shaft 41, a rotating shaft 42 and a bevel gear set 43 for connecting the transmission shaft 41 and the rotating shaft 42. The input end of the transmission shaft 41 is connected to the output end of the transmission assembly 3. The transmission assembly 3 transmits power to the transmission shaft 41 of the telescopic assembly 4, and then transmits the power to the rotating shaft 42 through the bevel gear set 43. A needle bearing assembly 5 is provided at the input end of the rotating shaft 42. By providing the needle bearing assembly 5, the friction force of the rotating shaft 42 during rotation can be reduced to achieve a labor-saving technical effect. The rotating shaft 42 is the main force-bearing component, and the needle bearing assembly 5 has a high radial bearing capacity, high strength and is not easy to be damaged.

[0058] The outer periphery of the rotating shaft 42 is sleeved with a sliding shaft 44, and the rotating shaft 42 and the sliding shaft 44 are slidably connected by a trapezoidal thread, and the outer periphery of the sliding shaft 44 is provided with a support seat 45 connected to the needle bearing assembly 5, and the sliding shaft 44 is slidably connected to the support seat 45 through a stud type roller bearing 46, and the support seat 45 is fixed on the needle bearing assembly 5, and the needle bearing assembly 5 is connected to the base 1, that is, the support seat 45 is fixed, and when the rotating shaft 42 rotates, the sliding shaft 44 will also rotate, but a slide groove extending along the axial direction is provided in the support seat 45, and the sliding shaft 4 4 is provided with a stud type roller bearing 46 that slides along the slide groove. Since the stud type roller bearing 46 is installed on the sliding shaft 44, the stud type roller bearing 46 slides along the slide groove of the support seat 45, and the support seat 45 is fixed, thus limiting the rotation of the sliding shaft 44, so that the sliding shaft 44 can only slide along the slide groove. The bottom end of the sliding shaft 44 is connected to the spray gun assembly, and the spray gun assembly realizes telescopic reciprocating motion with the sliding shaft 44, and no rotation occurs during the telescopic process. By arranging the stud type roller bearing 46, the sliding resistance is reduced, thereby achieving a labor-saving technical effect.

[0059] Among them, trapezoidal thread is a type of thread with an isosceles trapezoidal tooth profile and a tooth angle of 30 degrees. The internal and external threads are tightly attached to the conical surface and are not easy to loosen. It has good processability, high root strength and good concentricity.

[0060] Distance from the spray gun assembly to the tablet bed: During the rolling process of the tablets in the coating pan 100, they will tumble in a certain area to form a tablet bed. During the coating process, the spray gun assembly is perpendicular to the tablet bed. According to the process and batch requirements, the distance is different and needs to be adjusted. The distance adjustment mechanism provided in the present application can effectively adjust the distance. When in use, it is measured by a ruler, one person adjusts the distance and another person measures the distance. However, in actual applications, other distance measurement methods that meet the sanitary requirements can also be used. There is no limitation on this. Please refer to the prior art for the structure of the coating pan 100 and the spray gun assembly. It is not the focus of this application and will not be described in detail herein. The mechanism also includes a rotary drive assembly 19, but it is not the focus of this application. Please refer to the prior art and will not be described in detail herein.

[0061] The distance adjustment mechanism of the coating machine spray gun assembly arranged in the above manner is adjusted outside the coating pot 100, which is more reliable and safer. Compared with the prior art, it does not require electric cylinder or air cylinder drive. The operator can drive the assembly through the hand wheel 22 outside the coating pot 100 to achieve telescopic adjustment of the spray gun assembly, which is convenient for operation and maintenance, simple to select, and meets sanitary requirements. By setting a stud type roller bearing 46, the sliding resistance of the sliding shaft 44 during the up and down movement along the support seat 45 is reduced, thereby achieving the purpose of saving effort. In addition, the structure has a long adjustment distance and can be enlarged, which is suitable for application in production-type ordinary batch coating machines.

[0062] Please refer to Figure 6 The bottom end of the sliding shaft 44 is connected to the spray gun bracket 6, and the spray gun bracket 6 is used to connect the spray gun assembly. The end of the sliding shaft 44 close to the spray gun bracket 6 is sleeved with a linear bearing 7 and a grid ring 8. The grid ring 8 is located below the linear bearing 7. The linear bearing 7 is fixed in the support seat 45, and the grid ring 8 is fixed to the support seat 45 through the mounting sleeve 9.

[0063] It should be noted that the spray gun bracket 6 is fixed to the sliding shaft 44 by bolts, so that the spray gun bracket 6 will reciprocate and telescope together with the sliding shaft 44. The spray gun assembly hung on the spray gun bracket 6 will make the spray gun assembly reciprocate and telescope together with the spray gun bracket 6. The linear bearing 7 is provided to support the sliding shaft 44 when it reciprocates and telescopes, and to reduce the sliding resistance, which is more labor-saving. When the sliding shaft 44 reciprocates and telescopes, it contacts the grid ring 8. The grid ring 8 is a device specially used for sealing the linear sliding mechanism, which plays a role of dustproof and waterproof. The grid ring 8 is stuck in the installation sleeve 9, and the installation sleeve 9 is screwed onto the support seat 45 through threads, while limiting the axial sliding of the linear bearing 7.

[0064] Among them, the Gly ring 8 is composed of a rubber O-ring and a polytetrafluoroethylene ring. The O-ring applies force, and the Gly ring 8 is a double-acting piston seal. It has low friction, no creeping, small starting force, and high pressure resistance. The Gly ring 8 generates a high initial contact stress on the sealing surface due to its own deformation, preventing the leakage of the pressureless liquid. During operation, the pressure liquid squeezes the square sealing ring to the maximum extent through the elastic deformation of the O-ring, making it close to the sealing surface and generating a high additional contact stress that increases with the pressure of the pressure liquid, and together with the initial contact stress, prevents the leakage of the pressure liquid.

[0065] Please refer to Figure 4 and Figure 5 There are two stud type roller bearings 46 , and the two stud type roller bearings 46 are symmetrically arranged on the sliding shaft 44 .

[0066] It can be understood that the stud type roller bearings 46 are fixed to the sliding shaft 44 and are symmetrically distributed. The stud type roller bearings 46 are installed on the slide groove of the support seat 45. When the sliding shaft 44 moves up and down driven by the rotating shaft 42, the sliding resistance can be reduced, thereby achieving the purpose of labor saving. In this embodiment, two stud type roller bearings 46 are provided, but in actual application, there is no limitation on this, as long as the above technical effects can be achieved.

[0067] Furthermore, the needle bearing assembly 5 includes two needle bearings 51 , which are arranged on the rotating shaft 42 through a bearing mounting seat 52 . The needle bearing 51 is limited by a copper sleeve 53 and a first retaining ring 54 , and the support seat 45 is connected to the base 1 through the bearing mounting seat 52 .

[0068] It should be noted that the rotating shaft 42 and the needle bearing 51 are installed in the bearing mounting seat 52, and are limited by two copper sleeves 53 and a first retaining ring 54, and the first retaining ring 54 is a retaining ring of the inner ring of the bearing. The support seat 45 is connected to the base 1 through the bearing mounting seat 52, that is, the support seat 45 and the bearing mounting seat 52 are both fixed, and when in use, the rotating shaft 42 rotates in the bearing mounting seat 52.

[0069] Among them, copper sleeve 53 has high hardness, excellent wear resistance, is not prone to seizure, has good casting performance and cutting performance, has good corrosion resistance in the atmosphere and fresh water, and can be used for wear-resistant parts working under high load (below 20Mpa) and high sliding speed (8m / s). In the absence of lubricants and using water-based lubricants, it has good sliding and self-lubricating properties, poor casting performance, and good corrosion resistance to dilute sulfuric acid.

[0070] Please refer to Figure 2The base 1 includes a bevel gear housing 101, a shaft cylinder 102 and a fixed frame 103. The bevel gear set 43 is arranged in the bevel gear housing 101, the transmission assembly 3 is arranged in the shaft cylinder 102, the handle drive assembly 2 is arranged in the fixed frame 103, and a detachable inspection door 104 is provided on the top of the bevel gear housing 101. The bottom end surface of the bevel gear housing 101 is connected to the bearing mounting seat 52, one side surface of the bevel gear housing 101 is connected to one end of the shaft cylinder 102, and the other end of the shaft cylinder 102 is connected to the fixed frame 103.

[0071] It is understood that the bevel gear housing 101, the shaft cylinder 102 and the fixing frame 103 are fixed, the bearing mounting seat 52 and the inspection door 104 are fixed to the bevel gear housing 101 by bolts, and the bearing mounting seat 52 and the inspection door 104 connected to the bevel gear housing 101 are also fixed. The bevel gear set 43 is inspected and maintained through the inspection door 104.

[0072] Based on the above embodiment, the transmission assembly 3 includes a connecting shaft 31 rotatably arranged in the shaft cylinder 102, the input end of the connecting shaft 31 is connected to the output end of the handle drive assembly 2 through a universal joint 32, the output end of the connecting shaft 31 is connected to the input end of the transmission shaft 41 through a connecting sleeve 33, and the connecting shaft 31 and the transmission shaft 41 are both key-connected to the connecting sleeve 33.

[0073] It should be noted that the connecting shaft 31 and the transmission shaft 41 are connected together through a connecting shaft sleeve 33 with a keyway, and the transmission shaft 41 will rotate with the rotation of the connecting shaft 31. When in use, power is input through the handle drive assembly 2, and the power is transmitted to the connecting shaft 31 through the universal joint 32, so that the connecting shaft 31 rotates, and then the transmission shaft 41 is driven to rotate synchronously through the connecting shaft sleeve 33, and then the rotating shaft 42 is driven to rotate through the bevel gear set 43, and the sliding shaft 44 is driven to move up and down through the trapezoidal threads of the rotating shaft 42 and the sliding shaft 44 and the stud roller bearing 46 and the slide groove, and finally the spray gun assembly is driven to move up and down synchronously with the sliding shaft 44.

[0074] In the above embodiment, two first deep groove ball bearings 10 are provided on the transmission shaft 41, and the first deep groove ball bearings 10 are arranged on the transmission shaft 41 through the first bearing mounting support 11. The shaft cylinder 102 is connected to one side of the bevel gear housing 101 through the first bearing mounting support 11, and a second retaining ring 12 is provided at the end of the first deep groove ball bearing 10.

[0075] It is understandable that two first deep groove ball bearings 10 are installed on the transmission shaft 41. The dual bearing structure can improve the stability of the drive shaft 23 when rotating, and the friction is small and labor-saving when rotating. The transmission shaft 41 and the first deep groove ball bearing 10 are installed in the first bearing mounting support 11, and the second retaining ring 12, that is, the outer ring retaining ring of the bearing is limited. The first bearing mounting support 11 is fixed to the bevel gear housing 101 by bolts, and the shaft cylinder 102 is fixed to the step of the first bearing mounting support 11 by bolts.

[0076] As a preferred embodiment, a sealing ring 13 is provided between the bevel gear housing 101 and the inspection door 104 , the bearing mounting seat 52 , and the first bearing mounting support 11 , and a sealing ring 13 is also provided between the shaft cylinder 102 and the first bearing mounting support 11 .

[0077] It should be noted that in the present application, the parts connected to the bevel gear housing 101 are provided with sealing rings 13 to ensure a sealed connection and prevent water and dust from entering.

[0078] Please refer to Figure 7 The handle driving assembly 2 includes a handle 21 and a hand wheel 22 connected to the handle 21. The middle part of the hand wheel 22 is connected to the driving shaft 23. The output end of the driving shaft 23 is connected to the input end of the connecting shaft 31 through a universal joint 32. Two second deep groove ball bearings 14 are sleeved on the driving shaft 23. The second deep groove ball bearing 14 is arranged on the driving shaft 23 through a second bearing mounting support 15. The second bearing mounting support 15 is fixed to the fixing frame 103. A third retaining ring 16 is provided at the end of the second deep groove ball bearing 14.

[0079] It can be understood that the handwheel 22 and the drive shaft 23 are fixed together by a locking cap. In this way, power is input by rotating the handle 21 to drive the handwheel 22 to rotate, thereby driving the drive shaft 23 to rotate together. The drive shaft 23 and the connecting shaft 31 are connected together by a universal joint 32, so that the connecting shaft 31 rotates as the drive shaft 23 rotates.

[0080] Furthermore, two second deep groove ball bearings 14 are installed on the drive shaft 23. The dual bearing structure can improve the stability of the drive shaft 23 during rotation, and the friction during rotation is small and labor-saving. The drive shaft 23 and the second deep groove ball bearing 14 are installed in the second bearing mounting support 15, and are limited by the third retaining ring 16, which is the inner ring retaining ring of the bearing. The second bearing mounting support 15 is fixed together by a nut and a fixing frame 103, and is immovable.

[0081] In the above embodiment, a limit pin 17 is provided on the handwheel 22, and the limit pin 17 is installed on the handwheel 22 through a limit seat 18. The limit pin 17 is slidably arranged along the limit seat 18, and the limit pin 17 is pluggable in a limit groove 151 on the second bearing mounting support 15.

[0082] It should be noted that the limit pin 17 is installed on the hand wheel 22. When the limit pin 17 is inserted into the limit groove 151 on the second bearing mounting support 15, the hand wheel 22 is fixed, thereby preventing the sliding shaft 44 from sliding and causing the distance from the spray gun assembly to the tablet bed to change; when the limit pin 17 is separated from the second bearing mounting support 15, the hand wheel 22 can be rotated back and forth to adjust the sliding shaft 44 to extend and retract back and forth, thereby changing the distance from the spray gun assembly to the tablet bed. That is to say, when the mechanism is not in use, the limit pin 17 is inserted into the limit slot 151 to fix the handwheel 22 to prevent the handwheel 22 from rotating. When the mechanism is used, the limit pin 17 is pulled out of the limit slot 151, and the handle 21 is manually rotated to drive the handwheel 22 to rotate, thereby driving the drive shaft 23, the universal joint 32, the connecting shaft 31, the connecting shaft sleeve 33, the transmission shaft 41, the bevel gear set 43 and the rotating shaft 42 to rotate. Through the cooperation of the rotating shaft 42 with the sliding shaft 44 and the support seat 45, the sliding shaft 44 only moves up and down without rotating, thereby driving the spray gun assembly to move up and down synchronously, and then adjusting the distance between the spray gun assembly and the film bed.

[0083] In this embodiment, the spray gun assembly is moved downward by rotating the handle 21 forward, and is moved upward by rotating the handle 21 reversely. In actual applications, the spray gun assembly can be moved upward by rotating the handle 21 forward, and is moved downward by rotating the handle 21 reversely. There is no limitation to this.

[0084] There are multiple limit grooves 151, and the multiple limit grooves 151 are evenly arranged around the hand wheel 22. In the present application, there is no limitation on the specific scheme of the limit grooves 151, as long as the above-mentioned technical effect can be achieved.

[0085] In summary, the distance adjustment mechanism of the coating machine spray gun assembly provided by the present invention is that when the distance between the spray gun assembly and the tablet bed is too far, the handle 21 is rotated forward to rotate the drive shaft 23, and the torque passes through the universal joint 32, the connecting shaft 31, the connecting shaft sleeve 33, the transmission shaft 41, the bevel gear set 43 and the rotating shaft 42 in sequence, and is finally transmitted to the sliding shaft 44, so that the sliding shaft 44 moves downward, driving the spray gun assembly to move downward, that is, to move in the direction close to the tablet bed, thereby shortening the distance between the spray gun assembly and the tablet bed; when the distance between the spray gun assembly and the tablet bed is too close, the handle 21 is rotated backward to rotate the drive shaft 23, and the torque passes through the universal joint 32, the connecting shaft 31, the connecting shaft sleeve 33, the transmission shaft 41, the bevel gear set 43 and the rotating shaft 42 in sequence, and is finally transmitted to the sliding shaft 44, so that the sliding shaft 44 moves upward, driving the spray gun assembly to move upward, that is, to move away from the tablet bed, thereby increasing the distance between the spray gun assembly and the tablet bed.

[0086] When the handle driving assembly 2 rotates, the torque is transmitted to the telescopic assembly 4 through the flexible connection mechanism, that is, the transmission assembly 3. The rotating shaft 42 is rotated through the bevel gear set 43 inside the telescopic assembly 4. Through the trapezoidal thread transmission pair, that is, the trapezoidal threads of the rotating shaft 42 and the sliding shaft 44, the sliding shaft 44 performs reciprocating telescopic motion and drives the spray gun assembly to perform reciprocating telescopic motion together. Compared with the prior art, the setting method of the present application is more reliable, safer, labor-saving to adjust, has a long adjustment distance, and has a wide range of applications.

[0087] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0088] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0089] The above is a detailed introduction to the distance adjustment mechanism of the coating machine spray gun assembly provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A distance adjustment mechanism for a coating machine spray gun assembly, characterized in that: include: Base (1); A handle drive assembly (2), arranged on the base (1); A transmission assembly (3) is arranged on the base (1), and an input end of the transmission assembly (3) is connected to an output end of the handle drive assembly (2); A telescopic assembly (4), the telescopic assembly (4) comprising a transmission shaft (41), a rotating shaft (42) and a bevel gear set (43) for connecting the transmission shaft (41) and the rotating shaft (42), the input end of the transmission shaft (41) being connected to the output end of the transmission assembly (3), the input end of the rotating shaft (42) being provided with a needle bearing assembly (5), the needle bearing assembly (5) being connected to the base (1), the outer periphery of the rotating shaft (42) being sleeved with a sliding shaft (44), the rotating shaft (42) and the sliding shaft (44) being slidably connected via a trapezoidal thread, the outer periphery of the sliding shaft (44) being provided with a support seat (45) connected to the needle bearing assembly (5), the support seat (45) being provided with a slide groove extending in the axial direction, the sliding shaft (44) being provided with a stud type roller bearing (46) sliding along the slide groove, and the bottom end of the sliding shaft (44) being connected to the spray gun assembly; The bottom end of the sliding shaft (44) is connected to the spray gun bracket (6), and the spray gun bracket (6) is used to connect the spray gun assembly. The end of the sliding shaft (44) close to the spray gun bracket (6) is provided with a linear bearing (7) and a grid ring (8), and the grid ring (8) is located below the linear bearing (7). The linear bearing (7) is fixed in the support seat (45), and the grid ring (8) is fixed to the support seat (45) through a mounting sleeve (9).

2. The distance adjustment mechanism of the coating machine spray gun assembly according to claim 1, characterized in that: Two stud-type roller bearings (46) are provided, and the two stud-type roller bearings (46) are symmetrically arranged on the sliding shaft (44).

3. The distance adjustment mechanism of the coating machine spray gun assembly according to claim 2, characterized in that: The needle roller bearing assembly (5) comprises two needle roller bearings (51), the needle roller bearings (51) being arranged on the rotating shaft (42) via a bearing mounting seat (52), the needle roller bearings (51) being limited in position by a copper sleeve (53) and a first retaining ring (54), and the support seat (45) being connected to the base (1) via the bearing mounting seat (52).

4. The distance adjustment mechanism of the coating machine spray gun assembly according to claim 3, characterized in that: The base (1) comprises a bevel gear housing (101), a shaft cylinder (102) and a fixing frame (103); the bevel gear set (43) is arranged in the bevel gear housing (101); the transmission assembly (3) is arranged in the shaft cylinder (102); the handle drive assembly (2) is arranged in the fixing frame (103); a detachable inspection door (104) is provided on the top of the bevel gear housing (101); the bottom end surface of the bevel gear housing (101) is connected to the bearing mounting seat (52); one side surface of the bevel gear housing (101) is connected to one end of the shaft cylinder (102); and the other end of the shaft cylinder (102) is connected to the fixing frame (103).

5. The distance adjustment mechanism of the coating machine spray gun assembly according to claim 4, characterized in that: The transmission assembly (3) comprises a connecting shaft (31) rotatably arranged in the shaft cylinder (102); an input end of the connecting shaft (31) is connected to an output end of the handle drive assembly (2) via a universal joint (32); the output end of the connecting shaft (31) is connected to an input end of the transmission shaft (41) via a connecting shaft sleeve (33); and both the connecting shaft (31) and the transmission shaft (41) are key-connected to the connecting shaft sleeve (33).

6. The distance adjustment mechanism of the coating machine spray gun assembly according to claim 5, characterized in that: Two first deep groove ball bearings (10) are provided on the transmission shaft (41); the first deep groove ball bearings (10) are provided on the transmission shaft (41) via a first bearing mounting support (11); the shaft cylinder (102) is connected to a side surface of the bevel gear housing (101) via the first bearing mounting support (11); and a second retaining ring (12) is provided at an end of the first deep groove ball bearing (10).

7. The distance adjustment mechanism of the coating machine spray gun assembly according to claim 6, characterized in that: A sealing ring (13) is provided between the bevel gear housing (101) and the inspection door (104), the bearing mounting seat (52), and the first bearing mounting support (11); and a sealing ring (13) is also provided between the shaft cylinder (102) and the first bearing mounting support (11).

8. The distance adjustment mechanism of the coating machine spray gun assembly according to claim 5, characterized in that: The handle drive assembly (2) comprises a handle (21) and a hand wheel (22) connected to the handle (21); the middle of the hand wheel (22) is connected to a drive shaft (23); the output end of the drive shaft (23) is connected to the input end of the connecting shaft (31) via the universal joint (32); two second deep groove ball bearings (14) are sleeved on the drive shaft (23); the second deep groove ball bearings (14) are arranged on the drive shaft (23) via second bearing mounting supports (15); the second bearing mounting supports (15) are fixed to the fixing frame (103); and a third retaining ring (16) is provided at the end of the second deep groove ball bearing (14).

9. The distance adjustment mechanism of the coating machine spray gun assembly according to claim 8, characterized in that: The hand wheel (22) is provided with a limit pin (17), the limit pin (17) is mounted on the hand wheel (22) via a limit seat (18), the limit pin (17) is slidably arranged along the limit seat (18), and the limit pin (17) is inserted and removed in a limit groove (151) on the second bearing mounting support (15).

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