Zinc sulfide dome cover coating device

Abstract

The invention discloses a zinc sulfide dome cover coating device, and relates to the technical field of dome cover coating devices. A zinc sulfide dome cover coating device comprises a connecting rod connected to a base, and a plurality of limiting mounting cavities are formed in the circumference of the outer wall of the connecting rod; the negative pressure cavity is positioned at the top end of the connecting rod; through the arrangement of the swing arm assembly, only the pitching direction of the swing arm assembly needs to be changed, the height of a herringbone limiting buckle is changed, the angle between the herringbone limiting buckle and a second connecting arm in the swing arm assembly is changed, and when the spherical cover is inversely installed, a concave limiting part is automatically formed; the inverted spherical cover can be quickly clamped, so that forward mounting and inverted mounting of the spherical cover can be freely switched by changing the pitching direction of the swing arm assembly, the switching efficiency is high, the forward mounting and inverted mounting of the spherical cover can be quickly completed without other operations, and then vacuum sputter coating is facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of ball cover coating devices, and in particular relates to a zinc sulfide ball cover coating device. Background Art

[0002] Zinc sulfide materials have good transmittance and low absorption coefficient in the range of visible light 0.4μm to far infrared 12μm, and are widely used in the fields of infrared detector windows and missile fairings.

[0003] In order to avoid being affected by the light in the environment when in use, the ball cover made of zinc sulfide material will be coated on its inner and outer surfaces; however, due to the shape of the ball cover, it is difficult to fix the ball cover during the coating process. Therefore, a special coating base needs to be designed in the coating operation, which can be used to fix the front and back sides of the ball cover during the coating process, and the base can be freely switched to a design that fixes the front and back sides of the ball cover. Therefore, according to this coating process requirement, a set of special zinc sulfide ball cover coating equipment needs to be designed. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a zinc sulfide ball cover coating device that can overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: a zinc sulfide ball cover coating device, comprising: a connecting rod connected to a base, a plurality of limit installation cavities are opened on the circumference of the outer wall of the connecting rod; a negative pressure chamber, located at the top of the connecting rod; a swing arm assembly, the swing arm assembly comprises a second connecting arm and a first connecting arm and a connecting cylinder that are fixedly connected, one end of the first connecting arm is rotatably connected to the limit installation cavity, one end of the second connecting arm is slidably connected to the connecting cylinder, and the second connecting arm is connected to the inner wall of the connecting cylinder by a large tension spring; a connecting plate fixedly connected to a connecting block, one end of the second connecting arm is rotatably connected to the connecting block by a torsion spring, and the adjacent The connecting plates are elastically connected; a herringbone limiting buckle is fixedly connected to the connecting plate, and an arc-shaped outer side wall and an arc-shaped inner side wall are arranged on the herringbone limiting buckle. When the swing arm assembly is at a depression angle, the spherical cover is mounted on the connecting rod, and the inner wall of the spherical cover is in contact with the arc-shaped outer side wall of the herringbone limiting buckle, and the end wall of the spherical cover is in contact with the contact wall of the connecting plate. When the swing arm assembly is at an elevation angle, a recessed limiting portion is formed between the arc-shaped inner side walls on the plurality of herringbone limiting buckles, and the spherical cover is mounted upside down on the connecting rod, and the arc top of the spherical cover is located in the negative pressure cavity, and the outer wall of the spherical cover is in contact with the arc-shaped inner side wall, and the herringbone limiting buckle generates a clamping force on the spherical cover.

[0006] Furthermore, the connecting rod is located at the upper and lower sides of the limit installation cavity and is respectively fixedly connected to a first magnetic plate and a second magnetic plate, which are used to limit and fix the swing arm assembly in the pitch direction.

[0007] Preferably, a positioning block is fixedly connected to the top of the connecting rod, and an arc-shaped wall is provided on the upper surface of the positioning block. The negative pressure chamber is provided on the upper surface of the positioning block, and the negative pressure chamber is concave in shape. The diameter of the negative pressure chamber is the same as the outer diameter of the spherical cover; a limiting plate is fixedly connected to the connecting block, and the limiting plate is located below the second connecting arm.

[0008] Furthermore, support feet are symmetrically and fixedly connected to the bottom surfaces of the plurality of connecting plates, and the support feet are in contact with the surface of the base to keep the contact wall of the connecting plate level with the base.

[0009] Preferably, a ring is fixedly connected to the supporting foot, and adjacent connecting plates are connected by an arc rod. The two ends of the arc rod are respectively slidably connected to the rings on the adjacent connecting plates. The ring is connected to one end of the arc rod by a spring, and the two ends of the spring are respectively fixedly connected to the ring and one end of the arc rod.

[0010] Preferably, the arc rod is hollow, a nozzle is installed on the arc rod, and a gas bottle is installed on the connecting rod. When the swing arm assembly is turned from an elevation angle to a depression angle and from a depression angle to an elevation angle, the gas bottle is automatically inflated, and when the spherical cover is installed upright on the connecting rod, the gas bottle is driven to connect with the nozzle to automatically spray air onto the spherical cover.

[0011] Preferably, the second connecting arm is fixedly connected to a piston plate on one end of the connecting cylinder, a cavity is formed between the piston plate and one end of the connecting cylinder, the cavity between two adjacent connecting cylinders is connected through an air outlet pipe, the air outlet pipe is connected to a gas storage bottle, the connecting cylinder is fixedly connected to an air inlet pipe, both the air outlet pipe and the air inlet pipe are provided with a one-way valve, and the gas storage bottle is connected to the arc rod through a connecting pipe.

[0012] Preferably, a part of the connecting tube is fixedly connected to the connecting plate, a mounting shell is fixedly connected to the connecting tube, a sliding rod is slidably connected to the mounting shell, the end of the sliding rod is connected to the mounting shell by a small tension spring, a connecting hole is provided on the sliding rod, and when the spherical cover is properly installed, the end wall of the spherical cover pushes the sliding rod downward, so that the connecting hole on the sliding rod is connected to the connecting tube, and the compressed gas in the gas storage bottle is ejected from the nozzle.

[0013] Furthermore, an arcuate external rack is fixedly connected to the supporting foot of the connecting plate, and multiple arcuate external racks on the connecting plate are combined into an external gear ring member, and the connecting rod is rotatably connected to the base; it also includes a connecting platform, and an internal gear ring is rotatably connected to the connecting platform, and the base is installed on the connecting platform through a mounting hole, and the arcuate external rack is meshed with the internal gear ring.

[0014] Preferably, a negative pressure channel is provided in the connecting rod, and a rotary joint is installed at the end of the connecting rod.

[0015] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art: the present invention, through the swing arm assembly, only needs to change the pitch direction of the swing arm assembly to change the height of the herringbone limit buckle, and change the angle between the herringbone limit buckle and the second connecting arm in the swing arm assembly, so that when the spherical cover is inverted, a concave limit portion is automatically formed, and the inverted spherical cover is quickly clamped, so the spherical cover can be arbitrarily switched between forward installation and inverted installation by changing the pitch direction of the swing arm assembly, and the switching efficiency is fast, and the forward and inverted spherical covers can be quickly fixed without other operations, thereby facilitating vacuum sputtering coating;

[0016] In addition, the swing arm assembly can automatically inflate the gas storage bottle during the change of the pitch angle, and automatically make the nozzle spray clean the outer surface of the spherical cover when the spherical cover is installed forward, thereby effectively improving the coating quality.

[0017] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In the attached picture:

[0019] Figure 1 A schematic diagram of the three-dimensional structure of a zinc sulfide ball cover coating device proposed by the present invention Figure 1 ;

[0020] Figure 2 A zinc sulfide ball cover coating device proposed by the present invention Figure 1 The structural diagram at A in the middle;

[0021] Figure 3 A zinc sulfide ball cover coating device proposed by the present invention Figure 1 The structural diagram at B in the middle;

[0022] Figure 4 This is a schematic structural diagram of a base of a zinc sulfide ball cover coating device proposed by the present invention;

[0023] Figure 5 A top view of a zinc sulfide ball cover coating device proposed by the present invention;

[0024] Figure 6 A schematic diagram of the structure of a spherical cover of a zinc sulfide spherical cover coating device proposed by the present invention;

[0025] Figure 7 A zinc sulfide ball cover coating device proposed by the present invention Figure 6 Schematic diagram of the structure at C in the middle;

[0026] Figure 8 A zinc sulfide ball cover coating device proposed by the present invention Figure 7 The structural diagram at D in the middle;

[0027] Fig. 9 This is a schematic structural diagram of a negative pressure chamber and a negative pressure channel of a zinc sulfide ball cover coating device proposed by the present invention;

[0028] Fig.10 This is a schematic structural diagram of a connecting plate of a zinc sulfide ball cover coating device proposed by the present invention;

[0029] Fig.11 This is a schematic structural diagram of a connecting rod of a zinc sulfide ball cover coating device proposed by the present invention;

[0030] Fig.12 This is a schematic structural diagram of a connecting platform and an inner gear ring of a zinc sulfide ball cover coating device proposed by the present invention.

[0031] In the figure: 1, base; 10, spherical cover; 100, mounting hole; 101, end wall; 102, arc top; 11, connecting rod; 111, positioning block; 112, negative pressure cavity; 113, negative pressure channel; 114, limit mounting cavity; 12, first connecting arm; 120, swing arm assembly; 121, first magnetic plate; 122, connecting tube; 123, large tension spring; 124, second connecting arm; 125, cavity; 1251, air outlet pipe; 1252, air inlet pipe; 126, gas storage bottle; 127, connecting pipe; 1271. Mounting shell; 1272. Small tension spring; 1273. Sliding rod; 1274. Connecting hole; 13. Connecting plate; 131. Contact wall; 132. Herringbone limit buckle; 133. Arc-shaped outer wall; 134. Arc-shaped inner wall; 135. Connecting block; 136. Limiting plate; 137. Support foot; 14. Second magnetic plate; 15. Ring; 151. Arc-shaped rod; 152. Spring; 153. Nozzle; 16. Arc-shaped outer rack; 2. Vacuum sputtering coating machine; 3. Connecting table; 31. Inner gear ring. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0033] The following is combined with Figure 1 -Attached Fig.12 , describes in detail the technical solutions provided by each embodiment of the present invention.

[0034] Example 1: Reference Figure 1-Figure 12 A zinc sulfide ball cover coating device, comprising: a connecting rod 11 connected to a base 1, a plurality of limit installation cavities 114 are opened on the circumference of the outer wall of the connecting rod 11; a negative pressure cavity 112, located at the top of the connecting rod 11; a swing arm assembly 120, the swing arm assembly 120 includes a second connecting arm 124 and a first connecting arm 12 and a connecting tube 122 that are fixedly connected, one end of the first connecting arm 12 is rotatably connected to the limit installation cavity 114, one end of the second connecting arm 124 is slidably connected to the connecting tube 122, and the second connecting arm 124 is connected to the inner wall of the connecting tube 122 through a large tension spring 123; a connecting plate 13 fixedly connected to a connecting block 135, one end of the second connecting arm 124 is rotatably connected to the connecting block 135 through a torsion spring, and adjacent connecting plates 13 are elastically connected; a herringbone A herringbone-shaped limit buckle 132 is fixedly connected to the connecting plate 13. An arc-shaped outer side wall 133 and an arc-shaped inner side wall 134 are provided on the herringbone-shaped limit buckle 132. When the swing arm assembly 120 is at a depression angle, the spherical cover 10 is mounted on the connecting rod 11, and the inner wall of the spherical cover 10 is in contact with the arc-shaped outer side wall 133 of the herringbone-shaped limit buckle 132. The end wall 101 of the spherical cover 10 is in contact with the contact wall 131 of the connecting plate 13. When the swing arm assembly 120 is at an elevation angle, a concave limit portion is formed between the arc-shaped inner side walls 134 on the plurality of herringbone-shaped limit buckles 132, and the spherical cover 10 is inverted on the connecting rod 11. The arc top 102 of the spherical cover 10 is located in the negative pressure chamber 112, the outer wall of the spherical cover 10 is in contact with the arc-shaped inner side wall 134, and the herringbone-shaped limit buckle 132 generates a clamping force on the spherical cover 10;

[0035] The top of the connecting rod 11 is fixedly connected with a positioning block 111, and an arc-shaped wall is provided on the upper surface of the positioning block 111. A negative pressure chamber 112 is provided on the upper surface of the positioning block 111. The negative pressure chamber 112 is concave in shape, and the diameter of the negative pressure chamber 112 is the same as the outer diameter of the spherical cover 10; a limiting plate 136 is fixedly connected to the connecting block 135, and the limiting plate 136 is located below the second connecting arm 124;

[0036] The support foot 137 is fixedly connected with a collar 15, and the adjacent connecting plates 13 are connected by an arc rod 151. The two ends of the arc rod 151 are respectively slidably connected to the collar 15 on the adjacent connecting plates 13. The collar 15 is connected to one end of the arc rod 151 by a spring 152. The two ends of the spring 152 are respectively fixedly connected to the collar 15 and one end of the arc rod 151. It should be understood that the gap between the arc rod 151 and the collar 15 is large, so the arc rod 151 has a large activity space in the collar 15.

[0037] When the device is in use, by buckling the spherical cover 10 on the connecting rod 11 in the forward direction, the arcuate inner wall of the spherical cover 10 will contact the positioning block 111 on the top of the connecting rod 11, and the inner wall of the spherical cover 10 close to the end wall 101 will contact the arcuate outer side wall 133 on the herringbone limiting buckle 132. Since there are multiple herringbone limiting buckles 132 and they are arranged in a circle, when the spherical cover 10 is forward installed, the multiple herringbone limiting buckles 132 can quickly position the spherical cover 10, so that the spherical cover 10 is coaxial with the connecting rod 11, and after the spherical cover 10 is forward installed, the outer surface of the spherical cover 10 is not blocked, and thus the subsequent coating of the outer surface of the spherical cover 10 will not be affected;

[0038] When the spherical cover 10 is installed in the forward direction, the arc-shaped wall of the positioning block 111 contacts the inner surface of the spherical cover 10, and under the action of the negative pressure chamber 112, the spherical cover 10 is firmly adsorbed and fixed, thereby facilitating the forward installation of the spherical cover 10 and the coating operation on the outer surface of the spherical cover 10;

[0039] When the spherical cover 10 needs to be installed in the reverse direction, the swing arm assembly 120 is pushed or pulled upward, and the first connecting arm 12 on the swing arm assembly 120 rotates in the limit installation cavity 114. Since the connecting plates 13 connected to the swing arm assembly 120 are connected by the arc rod 151, when the swing arm assembly 120 is raised, it will simultaneously drive multiple connecting plates 13 to move upward together, and under the connection design of the second connecting arm 124 and the connecting tube 122 through the large tension spring 123, the swing arm assembly 120 and the connecting plate 13 are successfully transformed from being located below the connecting rod 11 to being located above the connecting rod 11 (refer to Fig.10 , Fig.11 );

[0040] When the swing arm assembly 120 rises, the plurality of connecting plates 13 are tightened with each other under the setting of the spring 152, so that the swing arm assembly 120 cannot rotate downward;

[0041] Since the connecting plate 13 is connected to the second connecting arm 124 through a torsion spring, when the swing arm assembly 120 is in an elevation state, the connecting plate 13 will rotate on the second connecting arm 124 at a certain angle (refer to Fig.10), so that the arc-shaped inner side wall 134 approaches the connecting rod 11, and the contact wall 131 on the connecting plate 13 forms a certain angle with the upper surface of the base 1, and the torsion spring is in a stressed state;

[0042] Therefore, when the spherical cover 10 is invertedly mounted on the connecting rod 11, the arc top 102 of the spherical cover 10 enters the concave limiting portion formed between the multiple arc-shaped inner side walls 134, and the herringbone limiting buckle 132 clamps the spherical cover 10 and limits the spherical cover 10 to avoid position deviation when the spherical cover 10 is inverted. When the top wall of the spherical cover 10 contacts the negative pressure chamber 112, the inverted spherical cover 10 is adsorbed, thereby completing the inverted mounting of the spherical cover 10.

[0043] After the inverted assembly is completed, the direction of the opening of the spherical cover 10 is opposite to that of the base 1, so that the opening position is not blocked, so that the inner wall of the spherical cover 10 can be effectively vacuum sputtered and coated;

[0044] Therefore, the device can switch between forward installation and inverted installation of the spherical cover 10 at will by only changing the pitch angle of the swing arm assembly 120, and the switching efficiency is fast, and the forward installation and inverted installation of the spherical cover 10 can be quickly fixed without other operations.

[0045] Furthermore, an arc-shaped outer rack 16 is fixedly connected to the support foot 137 of the connecting plate 13, and the arc-shaped outer racks 16 on the multiple connecting plates 13 are combined into an outer gear ring member, and the connecting rod 11 is rotatably connected to the base 1; it also includes a connecting platform 3, and an inner gear ring 31 is rotatably connected to the connecting platform 3. The base 1 is installed on the connecting platform 3 through the mounting hole 100, and the arc-shaped outer rack 16 is meshed with the inner gear ring 31;

[0046] The connecting platform 3 is located in the vacuum sputtering coating machine 2. By driving the inner gear ring 31 on the connecting platform 3 to rotate, the inner gear ring 31 engages with the arc-shaped outer rack 16, so that the connecting rod 11 rotates on the base 1, and then the spherical cover 10 can rotate when the coating is installed in the forward direction, thereby improving the coating effect of the spherical cover 10 when it is installed in the forward direction;

[0047] The rotation of the inner gear ring 31 can be achieved by installing a motor on the connecting platform 3, installing a gear on the output end of the motor, and the gear meshes with the inner teeth of the inner gear ring 31, thereby driving the inner gear ring 31 to rotate;

[0048] A negative pressure channel 113 is provided in the connecting rod 11, and a rotary joint is rotatably connected to the end of the connecting rod 11;

[0049] When the base 1 is mounted on the connecting platform 3 , the rotary joint at the end of the connecting rod 11 is plugged and connected to the negative pressure tube arranged on the connecting platform 3 , so that the negative pressure chamber 112 can perform suction to adsorb and fix the spherical cover 10 .

[0050] Example 2: Reference Figure 2 , Figure 3 , a zinc sulfide ball cover coating device, which is basically the same as embodiment 1, and further: the connecting rod 11 is located at the upper and lower sides of the limit installation cavity 114 and is respectively fixedly connected with a first magnetic attraction plate 121 and a second magnetic attraction plate 14, which are used to limit and fix the swing arm assembly 120 in the pitch direction;

[0051] The first magnetic attraction plate 121 and the second magnetic attraction plate 14 are provided to fix the swing arm assembly 120 again at the depression angle and elevation angle to prevent the swing arm assembly 120 from loosening;

[0052] A magnetic block capable of being attracted to the first magnetic attraction plate 121 and the second magnetic attraction plate 14 is embedded in the first connecting arm 12 of the swing arm assembly 120 .

[0053] The bottom surfaces of the plurality of connecting plates 13 are symmetrically fixedly connected with supporting feet 137, which are in contact with the surface of the base 1 to keep the contact wall 131 of the connecting plate 13 level with the base 1, thereby preventing the connecting plate 13 from rotating arbitrarily when the swing arm assembly 120 is in a depression angle state, making it inconvenient to quickly install the spherical cover 10 in a forward direction.

[0054] Example 3: Reference Figure 1 , Figure 7 , Fig.12 , a zinc sulfide spherical cover coating device, which is basically the same as the embodiment 2, and further: the arc rod 151 is hollow, the arc rod 151 is equipped with a nozzle 153, and the connecting rod 11 is equipped with a gas storage bottle 126, when the swing arm assembly 120 is turned from an elevation angle to a depression angle and from a depression angle to an elevation angle, the gas storage bottle 126 is automatically inflated, and when the spherical cover 10 is mounted on the connecting rod 11, the gas storage bottle 126 is driven to communicate with the nozzle 153 to automatically spray air onto the spherical cover 10;

[0055] When the spherical cover 10 is installed upright, the nozzle 153 sprays gas toward the outer wall of the spherical cover 10, thereby blowing away dust and foreign matter attached to the surface of the spherical cover 10 before coating, thereby avoiding affecting the coating quality of the spherical cover 10;

[0056] The nozzle 153 is installed on the arc rod 151 so that the nozzle 153 can just face the outer surface of the forward-mounted spherical cover 10 . Therefore, the arc rod 151 can not only be used to connect multiple connecting plates 13 , but also can be used for reasonable installation of the nozzle 153 .

[0057] Example 4: Reference Figure 2 , Figure 7 , Figure 8, a zinc sulfide ball cover coating device, which is basically the same as Example 3, and further: a second connecting arm 124 is fixedly connected to a piston plate on one end of the connecting cylinder 122, a cavity 125 is formed between the piston plate and one end of the connecting cylinder 122, the cavity 125 between two adjacent connecting cylinders 122 is connected through an air outlet pipe 1251, the air outlet pipe 1251 is connected to a gas storage bottle 126, an air inlet pipe 1252 is fixedly connected to the connecting cylinder 122, a one-way valve is provided on the air outlet pipe 1251 and the air inlet pipe 1252, and the gas storage bottle 126 is connected to the arc rod 151 through a connecting pipe 127;

[0058] A portion of the connecting tube 127 is fixedly connected to the connecting plate 13, a mounting shell 1271 is fixedly connected to the connecting tube 127, a slide bar 1273 is slidably connected to the mounting shell 1271, a small tension spring 1272 connects the end of the slide bar 1273 to the mounting shell 1271, a connecting hole 1274 is provided on the slide bar 1273, when the spherical cover 10 is properly installed, the end wall 101 of the spherical cover 10 pushes the slide bar 1273 downward, so that the connecting hole 1274 on the slide bar 1273 is connected to the connecting tube 127, and the compressed gas in the gas storage bottle 126 is ejected from the nozzle 153;

[0059] When the swing arm assembly 120 changes from an elevation angle to a depression angle, the function of automatically inflating the gas storage bottle 126 is that when the swing arm assembly 120 changes the pitch angle, the second connecting arm 124 is pulled, so that the piston plate slides in the connecting cylinder 122, and then the gas is inhaled into the cavity 125 of the connecting cylinder 122 through the air inlet pipe 1252. When the pitch angle is changed, the large tension spring 123 pulls the second connecting arm 124 to reset, and squeezes the gas in the cavity 125, and fills the gas into the gas storage bottle 126 from the air outlet pipe 1251. Since a one-way valve is provided on the air outlet pipe 1251, the gas in the gas storage bottle 126 will not enter the cavity 125 again.

[0060] When the spherical cover 10 is installed in the forward direction, the end wall 101 of the spherical cover 10 contacts the slide bar 1273 and pushes the slide bar 1273 downward, so that the connection hole 1274 on the slide bar 1273 is connected with the connection pipe 127, thereby allowing the gas stored in the gas storage bottle 126 to enter the arc rod 151;

[0061] Therefore, when the swing arm assembly 120 changes the pitch angle and switches the spherical cover 10 between forward installation and reverse installation, the gas storage bottle 126 is automatically inflated.

[0062] Therefore, the present invention only needs to change the pitch direction of the swing arm assembly 120 to change the height of the herringbone limit buckle 132 and change the angle between the herringbone limit buckle 132 and the second connecting arm 124 in the swing arm assembly 120, so that when the spherical cover 10 is inverted, a concave limit portion is automatically formed, and the inverted spherical cover 10 is quickly clamped. Therefore, by changing the pitch direction of the swing arm assembly 120, the spherical cover 10 can be switched between forward installation and inverted installation at will, and the switching efficiency is fast. The spherical cover 10 can be quickly fixed in the forward installation and inverted installation without other operations, so that vacuum sputtering coating is convenient.

[0063] In addition, the swing arm assembly 120 can automatically inflate the gas storage bottle 126 during the change of the pitch angle, and when the spherical cover 10 is installed forwardly, the nozzle 153 can automatically spray clean air toward the outer surface of the spherical cover 10, effectively improving the coating quality.

[0064] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the present invention can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A zinc sulfide dome coating device, comprising a base (1) installed in a vacuum sputtering coating machine (2), characterized in that: Also includes: A connecting rod (11) connected to the base (1), wherein a plurality of position limiting installation cavities (114) are provided on the circumference of an outer wall of the connecting rod (11); A negative pressure chamber (112) located at the top end of the connecting rod (11); A swing arm assembly (120), the swing arm assembly (120) comprising a second connecting arm (124) and a first connecting arm (12) and a connecting tube (122) which are fixedly connected, one end of the first connecting arm (12) being rotatably connected in the limit installation cavity (114), one end of the second connecting arm (124) being slidably connected in the connecting tube (122), and the second connecting arm (124) and the inner wall of the connecting tube (122) being connected via a large tension spring (123); A connecting plate (13) fixedly connected to a connecting block (135), one end of the second connecting arm (124) being rotatably connected to the connecting block (135) via a torsion spring, and adjacent connecting plates (13) being elastically connected; The herringbone-shaped limit buckle (132) is fixedly connected to the connecting plate (13), and the herringbone-shaped limit buckle (132) is provided with an arc-shaped outer side wall (133) and an arc-shaped inner side wall (134). When the swing arm assembly (120) is at a depression angle, the spherical cover (10) is mounted on the connecting rod (11), the inner wall of the spherical cover (10) is in contact with the arc-shaped outer wall (133) of the herringbone limit buckle (132), the end wall (101) of the spherical cover (10) is in contact with the contact wall (131) of the connecting plate (13), and the outer surface of the spherical cover (10) is vacuum sputtered and coated; When the swing arm assembly (120) is at an elevation angle, a recessed limiting portion is formed between the arc-shaped inner walls (134) on the plurality of herringbone limiting buckles (132), the spherical cover (10) is mounted upside down on the connecting rod (11), the arc top (102) of the spherical cover (10) is located in the negative pressure chamber (112), the outer wall of the spherical cover (10) contacts the arc-shaped inner wall (134), and the herringbone limiting buckles (132) generate a clamping force on the spherical cover (10), so that the inner surface of the spherical cover (10) is vacuum sputtered and coated.

2. The zinc sulfide ball cover coating device according to claim 1, characterized in that: The connecting rod (11) is located at the upper and lower sides of the limiting installation cavity (114), and is respectively fixedly connected to a first magnetic attraction plate (121) and a second magnetic attraction plate (14), so as to respectively limit and fix the swing arm assembly (120) in the pitch direction.

3. The zinc sulfide ball cover coating device according to claim 1, characterized in that: The top end of the connecting rod (11) is fixedly connected to a positioning block (111), the upper surface of the positioning block (111) is provided with an arc-shaped wall, the negative pressure chamber (112) is provided on the upper surface of the positioning block (111), the negative pressure chamber (112) is concave in shape, and the diameter of the negative pressure chamber (112) is the same as the outer diameter of the spherical cover (10); The connection block (135) is fixedly connected to a limit plate (136), and the limit plate (136) is located below the second connection arm (124).

4. The zinc sulfide ball cover coating device according to claim 2, characterized in that: Support feet (137) are symmetrically fixedly connected to the bottom surfaces of the plurality of connecting plates (13), and the support feet (137) are in contact with the surface of the base (1) to keep the contact wall (131) of the connecting plate (13) level with the base (1).

5. The zinc sulfide ball cover coating device according to claim 4, characterized in that: A collar (15) is fixedly connected to the support foot (137), and adjacent connecting plates (13) are connected via an arc-shaped rod (151). The two ends of the arc-shaped rod (151) are respectively slidably connected to the collar (15) on the adjacent connecting plates (13). The collar (15) and one end of the arc-shaped rod (151) are connected via a spring (152), and the two ends of the spring (152) are respectively fixedly connected to the collar (15) and one end of the arc-shaped rod (151).

6. The zinc sulfide ball cover coating device according to claim 5, characterized in that: The arc-shaped rod (151) is hollow, a nozzle (153) is mounted on the arc-shaped rod (151), and a gas storage bottle (126) is mounted on the connecting rod (11). When the swing arm assembly (120) is rotated from an elevation angle to a depression angle and vice versa, the gas storage bottle (126) is automatically inflated, and when the spherical cover (10) is mounted on the connecting rod (11), the gas storage bottle (126) is driven to communicate with the nozzle (153) to automatically spray air onto the spherical cover (10).

7. The zinc sulfide ball cover coating device according to claim 6, characterized in that: The second connecting arm (124) is fixedly connected to a piston plate at one end of the connecting cylinder (122); a cavity (125) is formed between the piston plate and one end of the connecting cylinder (122); the cavities (125) between two adjacent connecting cylinders (122) are connected via an air outlet pipe (1251); the air outlet pipe (1251) is connected to a gas storage bottle (126); an air inlet pipe (1252) is fixedly connected to the connecting cylinder (122); both the air outlet pipe (1251) and the air inlet pipe (1252) are provided with a one-way valve; the gas storage bottle (126) is connected to the arc rod (151) via a connecting pipe (127).

8. The zinc sulfide ball cover coating device according to claim 7, characterized in that: A portion of the connecting tube (127) is fixedly connected to the connecting plate (13); a mounting shell (1271) is fixedly connected to the connecting tube (127); a sliding rod (1273) is slidably connected to the mounting shell (1271); a distal end of the sliding rod (1273) is connected to the mounting shell (1271) via a small tension spring (1272); a connecting hole (1274) is provided on the sliding rod (1273); When the spherical cover (10) is installed upright, the end wall (101) of the spherical cover (10) pushes the slide bar (1273) to move downward, so that the connection hole (1274) on the slide bar (1273) is connected to the connection pipe (127), and the compressed gas in the gas storage bottle (126) is ejected from the nozzle (153).

9. The zinc sulfide ball cover coating device according to claim 4, characterized in that: An arc-shaped external toothed rack (16) is fixedly connected to the supporting foot (137) of the connecting plate (13); a plurality of arc-shaped external toothed racks (16) on the connecting plate (13) are combined into an external toothed rack; and the connecting rod (11) is rotatably connected to the base (1); It also comprises a connecting platform (3), to which an inner gear ring (31) is rotatably connected, the base (1) is mounted on the connecting platform (3) through a mounting hole (100), and the arc-shaped outer gear rack (16) is meshed with the inner gear ring (31).

10. The zinc sulfide ball cover coating device according to claim 9, characterized in that: A negative pressure channel (113) is provided in the connecting rod (11), and a rotary joint is installed at the end of the connecting rod (11).

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