阅读说明：本技术 一种防掉落的真空离子镀膜用工件固定装置 (Anti-falling workpiece fixing device for vacuum ion plating ) 是由 刘畅 杨兵 徐勇斌 王俊见 于 2021-08-03 设计创作，主要内容包括：一种防掉落的真空离子镀膜用工件固定装置,本发明涉及镀膜装置技术领域,支撑柱的左右两侧对称设置有调节杆,调节杆上等间距通过转轴和轴承旋转连接有数个连动杆,且连动杆的端部均固定设置有半齿轮；位于右侧的调节杆的下端固定连接有导向轮,导向轮的下侧设置有椭圆轮,且导向轮滚动贴设在椭圆轮的外侧壁上；支撑柱的左右两侧壁上从上到下依次等间距固定设置有数个承接板；相对应位置上的承接板和上封板之间的调节柱上均固定设置有支撑条,支撑条的一端上侧面上通过轴承垂直旋转设置有螺杆,螺杆的上端通过螺纹旋转套设有内螺纹管；能够对管状工件进行很好的夹持固定,有效的防止在镀膜过程中产生掉落,同时,使得镀膜更加均匀。(The invention relates to an anti-falling workpiece fixing device for vacuum ion plating, which relates to the technical field of a plating device.A left side and a right side of a support column are symmetrically provided with adjusting rods, the adjusting rods are connected with a plurality of linkage rods in a rotating manner at equal intervals through rotating shafts and bearings, and the end parts of the linkage rods are fixedly provided with half gears; the lower end of the adjusting rod on the right side is fixedly connected with a guide wheel, an elliptical wheel is arranged on the lower side of the guide wheel, and the guide wheel is attached to the outer side wall of the elliptical wheel in a rolling manner; a plurality of bearing plates are fixedly arranged on the left side wall and the right side wall of the supporting column from top to bottom at equal intervals; support bars are fixedly arranged on the adjusting columns between the bearing plates and the upper sealing plates at corresponding positions, a screw rod is vertically and rotationally arranged on the upper side surface of one end of each support bar through a bearing, and an internal threaded pipe is arranged at the upper end of each screw rod through a threaded rotating sleeve; can carry out fine centre gripping to the tubulose work piece and fix, effectually prevent to produce at the coating film in-process and drop for the coating film is more even simultaneously.)

1. An anti-falling workpiece fixing device for vacuum ion plating, which comprises a bottom plate (1) and a gear box (2), the gear box is fixedly arranged on the top surface of the bottom plate (1), a rotating plate (3) is movably arranged on the inner top surface of the gear box (2), the bottom surface of the rotating plate (3) is rotatably arranged on the bottom plate (1) through a flat-top thrust ball bearing, a supporting column (4) is vertically and fixedly arranged in the middle of the top surface of the rotating plate (3), the upper end of the supporting column (4) is rotatably arranged on the top surface of the gear box (2) in a penetrating manner through a bearing, gear rings (5) are fixedly arranged on the peripheral walls of the rotating plate (3), one side of each gear ring (5) is provided with the driving gear (6), the middle of each driving gear (6) is fixedly arranged on an output shaft of the driving motor (7), and the driving motor (7) is fixedly arranged on the bottom plate (1) through a motor support; the method is characterized in that: the device also comprises an upper sealing plate (17), a bearing plate (15), an adjusting rod (8), a linkage rod (9), a semi-gear (11), an internal threaded pipe (21), a screw rod (20), a synchronous gear (27), a transmission chain, a first connecting rod (23), a second connecting rod (25) and a support bar (19); the left side and the right side of the supporting column (4) are symmetrically provided with adjusting rods (8), the adjusting rods (8) are connected with a plurality of linkage rods (9) at equal intervals through rotating shafts and bearings in a rotating mode, the other ends of the linkage rods (9) are arranged in slots (10) formed in the supporting column (4) in a rotating mode through the rotating shafts and the bearings, the end portions of the linkage rods (9) are fixedly provided with half gears (11), and the half gears (11) on the left side and the right side in the same slot (10) are arranged in a meshed mode; the lower end of the adjusting rod (8) on the right side is fixedly connected with a guide wheel (12), an elliptical wheel (13) is arranged on the lower side of the guide wheel (12), the guide wheel (12) is attached to the outer side wall of the elliptical wheel (13) in a rolling mode, the middle of the elliptical wheel (13) is fixedly connected with an output shaft of an adjusting motor (14), and the adjusting motor (14) is fixedly arranged on the right side wall of the supporting column (4) through a motor support; a plurality of bearing plates (15) are fixedly arranged on the left side wall and the right side wall of each bearing plate (4) from top to bottom at equal intervals in sequence, a first adjusting groove (16) is formed in the middle of each bearing plate (15), an upper sealing plate (17) is fixedly arranged on each bearing plate (15) on the supporting column (4), a second adjusting groove (18) is formed in the middle of each upper sealing plate (17), and adjusting rods (8) are movably arranged in the middles of the first adjusting groove (16) and the second adjusting groove (18) in a penetrating mode respectively; supporting bars (19) are fixedly arranged on adjusting columns between the bearing plates (15) and the upper sealing plates (17) at corresponding positions, a screw rod (20) is vertically and rotatably arranged on the upper side face of one end of each supporting bar (19) through a bearing, and an internal threaded pipe (21) is arranged at the upper end of each screw rod (20) through a threaded rotating sleeve; first shaft seats (22) are symmetrically and fixedly arranged on the left side wall and the right side wall of the lower end of the internal threaded pipe (21), the middle part of each first shaft seat (22) is rotationally connected with one end of a first connecting rod (23) through a rotating shaft and a bearing, second shaft seats (24) are symmetrically and fixedly arranged on the left side wall and the right side wall of the lower end of the screw rod (20), the middle part of each second shaft seat (24) is rotationally connected with one end of a second connecting rod (25) through a rotating shaft and a bearing, and the other end of each second connecting rod (25) is rotationally connected with the other end of the first connecting rod (23) through a rotating shaft and a bearing; a rotating motor (26) is fixedly arranged on the side wall of the supporting column (4) at one side of the supporting strip (19) through a motor support, synchronous gears (27) are sleeved on an output shaft of the rotating motor (26) and a screw rod (20) at the lower side of the second shaft seat (24), and the synchronous gears (27) at the corresponding positions of the left side and the right side are in transmission connection through synchronous chains (28); the driving motor (7), the adjusting motor (14) and the rotating motor (26) are all connected with an external power supply.

2. The drop-proof workpiece fixing device for vacuum ion plating according to claim 1, characterized in that: sliding grooves (29) are symmetrically formed in the front side wall and the rear side wall inside the first adjusting groove (16), a plurality of sliding blocks (30) are arranged inside the sliding grooves (29) in a sliding mode, and the sliding blocks (30) and the sliding grooves (29) are arranged in a matched T-shaped structure; the sliding blocks (30) on the front side and the rear side are arranged in a matched mode, the telescopic cloth (31) is fixedly arranged between the sliding blocks (30) on the front side and the rear side, the left end and the right end of the telescopic cloth (31) are fixedly arranged on the left side wall and the right side wall inside the first adjusting groove (16) respectively, and the adjusting rod (8) is movably arranged in the middle of the adjusting cloth in a penetrating mode; when the adjusting rod (8) moves up and down, left and right in the first adjusting groove (16), the telescopic cloth (31) is adjusted in the sliding groove (29) through the sliding block (30) in a telescopic mode, and the first adjusting groove (16) is sealed.

3. The drop-proof workpiece fixing device for vacuum ion plating according to claim 1, characterized in that: the periphery of the upper side surface of the bearing plate (15) is fixedly provided with a blocking net (32); when the screw rod (20) and the internal thread pipe (21) clamp a tubular workpiece, the blocking net (32) protects the workpiece when the workpiece falls.

4. The drop-proof workpiece fixing device for vacuum ion plating according to claim 1, characterized in that: a connecting piece (33) is fixedly sleeved on a rotating shaft at the connecting end part of the first connecting rod (23) and the second connecting rod (25), the end part of the connecting piece (33) is rotatably connected with a contact (34) through the rotating shaft and a bearing, and a rubber gasket (35) is fixedly arranged on the outer side wall of the contact (34); when a connecting rod (23) and No. two connecting rods (25) carry out the centre gripping to the pipe fitting, support contact (34) and support and establish on the inside wall of pipe fitting, increased the area of contradicting, simultaneously, rubber gasket (35) have reduced the wearing and tearing to the pipe fitting inside wall.

5. The drop-proof workpiece fixing device for vacuum ion plating according to claim 1, characterized in that: an adjusting hand screw (36) is fixedly arranged on the upper end surface of the internal thread pipe (21); the position of the internally threaded pipe (21) is adjusted by rotating the adjusting hand (36).

6. The drop-proof workpiece fixing device for vacuum ion plating according to claim 1, characterized in that: the working principle is as follows: when feeding is carried out, the upper end of the internal threaded pipe (21) is exposed on the right side of the upper sealing plate (17), the internal threaded pipe (21) is rotated upwards, so that the side walls of the first connecting rod (23) and the second connecting rod (25) are close to the screw rod (20), the tubular workpiece is sleeved on the outer sides of the internal threaded pipe (21) and the screw rod (20), and the internal threaded pipe (21) is rotated downwards at the moment, so that the end part connected with the first connecting rod (23) and the second connecting rod (25) props against the inner side wall of the tubular workpiece; after the feeding is finished, an adjusting motor (14) is turned on, the output end of the adjusting motor (14) drives an elliptical wheel (13) to rotate, the side wall of the elliptical wheel (13) is attached to a guide wheel (12), the elliptical wheel (13) drives a right adjusting rod (8) to move up and down, the adjusting rods (8) on the left side and the right side are synchronously moved due to the fact that half gears (11) at the end portions of linkage rods (9) are meshed, when the adjusting rods (8) ascend, the adjusting rods (8) synchronously move towards the direction close to a supporting column (4), at the moment, the upper ends of internal thread pipes (21) are located on the lower side of the bottom surface of an upper sealing plate (17), so that tubular workpieces cannot fall out of the upper ends of the internal thread pipes (21), and the adjusting motor (14) stops working; open driving motor (7) and rotating electrical machines (26), the output of driving motor (7) drives drive gear (6) and rotates, because drive gear (6) and ring gear (5) mesh mutually, support column (4) rotate on the upper portion of gear box (2), rotating electrical machines (26) pass through synchronizing gear (27) and drive chain's transmission effect, drive screw rod (20) and rotate, and then drive the pipe fitting and rotate.

Technical Field

The invention relates to the technical field of coating devices, in particular to an anti-falling workpiece fixing device for vacuum ion coating.

Background

Vacuum coating is a technology for producing a thin film material by a physical method, atoms of the material are separated out from a heating source in a vacuum chamber and hit on the surface of a coated object, when vacuum coating is carried out, a workpiece is fixed inside a vacuum ion coating machine by using a clamp, and the phenomenon that the workpiece falls off is easily generated in the coating process by using the conventional fixing device, particularly a tubular workpiece, the tubular workpiece is easy to fall off when a hanging rack is adopted, the workpiece is easy to be damaged, and meanwhile, secondary coating is required for the tubular workpiece, so that the use is inconvenient, and therefore, a workpiece fixing device for vacuum ion coating is urgently needed.

Disclosure of Invention

The invention aims to overcome the defects and shortcomings of the prior art, and provides the anti-falling workpiece fixing device for vacuum ion plating, which is simple in structure, reasonable in design and convenient to use, can well clamp and fix a tubular workpiece, effectively prevents the tubular workpiece from falling in the plating process, and enables the plating to be more uniform.

In order to achieve the purpose, the invention adopts the technical scheme that: the gear box is fixedly arranged on the top surface of the bottom plate, a rotating plate is movably arranged on the inner top surface of the gear box, the bottom surface of the rotating plate is rotatably arranged on the bottom plate through a flat-top thrust ball bearing, a support column is vertically and fixedly arranged in the middle of the top surface of the rotating plate, the upper end of the support column is rotatably arranged on the top surface of the gear box in a penetrating manner through a bearing, the tooth rings are fixedly arranged on the peripheral walls of the rotating plate, one side of each tooth ring is provided with the driving gear, the middle of the driving gear is fixedly arranged on an output shaft of the driving motor, and the driving motor is fixedly arranged on the bottom plate through a motor support; the device also comprises an upper sealing plate, a bearing plate, an adjusting rod, a linkage rod, a half gear, an internal threaded pipe, a screw, a synchronous gear, a transmission chain, a first connecting rod, a second connecting rod and a supporting strip; the left side and the right side of the supporting column are symmetrically provided with adjusting rods, the adjusting rods are connected with a plurality of linkage rods at equal intervals through rotating shafts and bearings in a rotating mode, the other ends of the linkage rods are arranged in slots formed in the supporting column in a rotating mode through the rotating shafts and the bearings, the end portions of the linkage rods are fixedly provided with half gears, and the half gears on the left side and the right side in the same slot are meshed; the lower end of the adjusting rod on the right side is fixedly connected with a guide wheel, an elliptical wheel is arranged on the lower side of the guide wheel, the guide wheel is attached to the outer side wall of the elliptical wheel in a rolling mode, the middle of the elliptical wheel is fixedly connected with an output shaft of an adjusting motor, and the adjusting motor is fixedly arranged on the right side wall of the supporting column through a motor support; a plurality of bearing plates are fixedly arranged on the left side wall and the right side wall of the supporting column from top to bottom at equal intervals in sequence, a first adjusting groove is formed in the middle of each bearing plate, an upper sealing plate is fixedly arranged on the supporting column on the upper side of each bearing plate, a second adjusting groove is formed in the middle of each upper sealing plate, and adjusting rods are movably arranged in the middle of the first adjusting groove and the second adjusting groove in a penetrating mode respectively; support bars are fixedly arranged on the adjusting columns between the bearing plates and the upper sealing plates at corresponding positions, a screw rod is vertically and rotationally arranged on the upper side surface of one end of each support bar through a bearing, and an internal threaded pipe is arranged at the upper end of each screw rod through a threaded rotating sleeve; the left side wall and the right side wall of the lower end of the internal thread pipe are symmetrically and fixedly provided with a first shaft seat, the middle part of the first shaft seat is rotationally connected with one end of a first connecting rod through a rotating shaft and a bearing, the left side wall and the right side wall of the lower end of the screw rod are symmetrically and fixedly provided with a second shaft seat, the middle part of the second shaft seat is rotationally connected with one end of the second connecting rod through the rotating shaft and the bearing, and the other end of the second connecting rod is rotationally connected with the other end of the first connecting rod through the rotating shaft and the bearing; a rotating motor is fixedly arranged on the side wall of the supporting column at one side of the supporting strip through a motor support, synchronous gears are sleeved on an output shaft of the rotating motor and on the screw rods at the lower side of the second shaft seat, and the synchronous gears at the corresponding positions on the left side and the right side are in transmission connection through synchronous chains; the driving motor, the adjusting motor and the rotating motor are all connected with an external power supply.

Preferably, sliding grooves are symmetrically formed in the front side wall and the rear side wall inside the first adjusting groove, a plurality of sliding blocks are slidably arranged inside the sliding grooves, and the sliding blocks and the sliding grooves are arranged in a matched T-shaped structure; the sliding blocks on the front side and the rear side are matched, the telescopic cloth is fixedly arranged between the sliding blocks on the front side and the rear side, the left end and the right end of the telescopic cloth are respectively fixedly arranged on the left side wall and the right side wall inside the first adjusting groove, and the adjusting rod is movably arranged in the middle of the adjusting cloth in a penetrating manner; when the adjusting rod moves up and down, left and right in the first adjusting groove, the telescopic cloth is adjusted in the sliding groove in a telescopic mode through the sliding block, and the first adjusting groove is sealed.

Preferably, the periphery of the upper side surface of the bearing plate is fixedly provided with a blocking net; when the screw rod and the internal thread pipe clamp the tubular workpiece, the workpiece is protected by the blocking net when falling.

Preferably, a connecting piece is fixedly sleeved on a rotating shaft at the connecting end part of the first connecting rod and the second connecting rod, the end part of the connecting piece is rotatably connected with a contact through the rotating shaft and a bearing, and a rubber gasket is fixedly arranged on the outer side wall of the contact; when a connecting rod and No. two connecting rods carry out the centre gripping to the pipe fitting, the conflict head supports to establish on the inside wall of pipe fitting, has increased the area of conflict, and simultaneously, the rubber gasket has reduced the wearing and tearing to the pipe fitting inside wall.

Preferably, an adjusting hand screw is fixedly arranged on the upper end surface of the internal thread pipe; the position of the internal thread pipe is adjusted by rotating and screwing the adjusting hand.

The working principle of the invention is as follows: when feeding is carried out, the upper end of the internal threaded pipe is exposed at the right side of the upper sealing plate, the internal threaded pipe is rotated upwards, so that the side walls of the first connecting rod and the second connecting rod are close to the screw rod, the tubular workpiece is sleeved on the outer sides of the internal threaded pipe and the screw rod, and the internal threaded pipe is rotated downwards at the moment, so that the end part connected with the first connecting rod and the second connecting rod is propped against the inner side wall of the tubular workpiece; after the feeding is finished, the adjusting motor is started, the output end of the adjusting motor drives the elliptical wheel to rotate, the side wall of the elliptical wheel is attached to the guide wheel, the elliptical wheel drives the adjusting rod on the right side to move up and down, the half gears at the end parts of the linkage rods are meshed, the adjusting rods on the left side and the right side move synchronously, when the adjusting rods ascend, the adjusting rods move synchronously in the direction close to the supporting columns, at the moment, the upper end of the internal thread pipe is located on the lower side of the bottom surface of the upper sealing plate, so that the tubular workpiece cannot fall out of the upper end of the internal thread pipe, and the adjusting motor stops working; open driving motor and rotating electrical machines, driving motor's output drives drive gear and rotates, because drive gear and ring gear mesh mutually, the support column rotates on the upper portion of gear box, and rotating electrical machines passes through synchronous gear and drive chain's transmission effect, drives the screw rod and rotates, and then drives the pipe fitting and rotates.

Compared with the prior art, the invention has the beneficial effects that:

1. the included angle between the first connecting rod and the second connecting rod is adjusted by rotating the position of the internal threaded pipe, so that the connecting end part of the first connecting rod and the second connecting rod is abutted against the inner side wall of the pipe fitting, the tubular workpiece can be well clamped and fixed, and the tubular workpiece is effectively prevented from falling in the film coating process;

2. the driving motor and the rotating motor drive the pipe fitting to rotate while revolving, so that the coating is more uniform;

3. the elliptical wheel is driven to rotate through the adjusting motor, the position of the adjusting rod is adjusted, and then the clamped pipe fitting is moved to the bottom of the upper sealing plate, so that the pipe fitting is not prone to dropping.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Fig. 3 is an enlarged view of a portion B in fig. 1.

Fig. 4 is a schematic structural view of the upper closing plate of the present invention.

Fig. 5 is a schematic view of the connection structure of the bearing plate and the barrier net of the present invention.

Description of reference numerals:

the device comprises a bottom plate 1, a gear box 2, a rotating plate 3, a supporting column 4, a toothed ring 5, a driving gear 6, a driving motor 7, an adjusting rod 8, a linkage rod 9, a slot 10, a half gear 11, a guide wheel 12, an elliptical wheel 13, an adjusting motor 14, a bearing plate 15, a first adjusting groove 16, an upper sealing plate 17, a second adjusting groove 18, a supporting strip 19, a screw rod 20, an internal threaded pipe 21, a first shaft seat 22, a first connecting rod 23, a second shaft seat 24, a second connecting rod 25, a rotating motor 26, a synchronizing gear 27, a synchronizing chain 28, a sliding groove 29, a sliding block 30, telescopic cloth 31, a blocking net 32, a connecting piece 33, a contact head 34, a rubber gasket 35 and an adjusting hand screw 36.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

Referring to fig. 1 to 5, the technical solution adopted by the present embodiment is: the gearbox comprises a bottom plate 1, a gearbox 2, a gear ring 5, a driving gear 6 and a driving motor 7, wherein the gearbox 2 is fixedly welded on the top surface of the bottom plate 1, a rotating plate 3 is movably arranged on the inner top surface of the gearbox 2, the bottom surface of the rotating plate 3 is rotatably arranged on the bottom plate 1 through a flat-top thrust ball bearing and a bolt, a supporting column 4 is vertically and fixedly welded in the middle of the top surface of the rotating plate 3, the upper end of the supporting column 4 is rotatably arranged on the top surface of the gearbox 2 in a penetrating manner through a bearing, the gear ring 5 is fixedly welded on the peripheral wall of the rotating plate 3, the driving gear 6 is arranged on one side of the gear ring 5, the middle of the driving gear 6 is fixedly welded on an output shaft of the driving motor 7, and the driving motor 7 is fixedly arranged on the bottom plate 1 through a motor bracket and the bolt; the device also comprises an upper sealing plate 17, a bearing plate 15, an adjusting rod 8, a linkage rod 9, a half gear 11, an internal threaded pipe 21, a screw rod 20, a synchronous gear 27, a transmission chain, a first connecting rod 23, a second connecting rod 25 and a supporting strip 19; the left side and the right side of the supporting column 4 are symmetrically provided with adjusting rods 8, the adjusting rods 8 are connected with a plurality of linkage rods 9 at equal intervals through rotating shafts and bearings in a rotating mode, the other ends of the linkage rods 9 are all arranged in slots 10 formed in the supporting column 4 through rotating shafts and bearings in a rotating mode, the end portions of the linkage rods 9 are all fixedly provided with half gears 11, and the half gears 11 on the left side and the right side in the same slot 10 are meshed; the lower end of the adjusting rod 8 on the right side is fixedly connected with a guide wheel 12, an elliptical wheel 13 is arranged on the lower side of the guide wheel 12, the guide wheel 12 is attached to the outer side wall of the elliptical wheel 13 in a rolling mode, the middle of the elliptical wheel 13 is fixedly connected with an output shaft of an adjusting motor 14, and the adjusting motor 14 is fixedly arranged on the right side wall of the supporting column 4 through a motor support and a bolt; a plurality of bearing plates 15 are fixedly arranged on the left side wall and the right side wall of the supporting column 4 from top to bottom at equal intervals in sequence, a first adjusting groove 16 is formed in the middle of each bearing plate 15, an upper sealing plate 17 is fixedly welded on the supporting column 4 on the upper side of each bearing plate 15, a second adjusting groove 18 is formed in the middle of each upper sealing plate 17, and the adjusting rods 8 are movably arranged in the middle of the first adjusting groove 16 and the second adjusting groove 18 respectively; sliding grooves 29 are symmetrically formed in the front side wall and the rear side wall inside the first adjusting groove 16, a plurality of sliding blocks 30 are slidably arranged inside the sliding grooves 29, and the sliding blocks 30 and the sliding grooves 29 are arranged in a matched T-shaped structure; the sliding blocks 30 on the front side and the rear side are arranged in a matched mode, the telescopic cloth 31 is fixedly arranged between the sliding blocks 30 on the front side and the rear side through bolts, the left end and the right end of the telescopic cloth 31 are respectively fixedly arranged on the left side wall and the right side wall inside the first adjusting groove 16, and the adjusting rod 8 is movably arranged in the middle of the adjusting cloth in a penetrating mode; when the adjusting rod 8 moves up and down, left and right in the first adjusting groove 16, the telescopic cloth 31 is adjusted in the sliding groove 29 through the sliding block 30 in a telescopic manner to seal the first adjusting groove 16; support bars 19 are fixedly welded on the adjusting columns between the bearing plates 15 and the upper sealing plate 17 at corresponding positions, a screw rod 20 is vertically and rotatably arranged on the upper side surface of one end of each support bar 19 through a bearing, and an internal threaded pipe 21 is rotatably sleeved at the upper end of each screw rod 20 through threads; first shaft seats 22 are symmetrically and fixedly welded on the left side wall and the right side wall of the lower end of the internal threaded pipe 21, the middle part of each first shaft seat 22 is rotationally connected with one end of a first connecting rod 23 through a rotating shaft and a bearing, second shaft seats 24 are symmetrically and fixedly welded on the left side wall and the right side wall of the lower end of the screw rod 20, the middle part of each second shaft seat 24 is rotationally connected with one end of a second connecting rod 25 through a rotating shaft and a bearing, and the other end of the second connecting rod 25 is rotationally connected with the other end of the first connecting rod 23 through a rotating shaft and a bearing; a rotating motor 26 is fixedly arranged on the side wall of the supporting column 4 at one side of the supporting strip 19 through a motor bracket and a bolt, a synchronizing gear 27 is welded and sleeved on an output shaft of the rotating motor 26 and a screw rod 20 at the lower side of the second shaft seat 24, and the synchronizing gears 27 at the corresponding positions on the left side and the right side are in transmission connection through a synchronizing chain 28; the periphery of the upper side surface of the bearing plate 15 is fixedly provided with a barrier net 32 through bolts; when the screw rod 20 and the internally threaded pipe 21 clamp the tubular workpiece, the workpiece is protected by the barrier net 32 when falling; a connecting piece 33 is fixedly welded and sleeved on a rotating shaft at the connecting end part of the first connecting rod 23 and the second connecting rod 25, the end part of the connecting piece 33 is rotatably connected with a touch head 34 through the rotating shaft and a bearing, and a rubber gasket 35 is fixedly arranged on the outer side wall of the touch head 34; when the first connecting rod 23 and the second connecting rod 25 clamp the pipe fitting, the contact head 34 is abutted against the inner side wall of the pipe fitting, so that the contact area is increased, and meanwhile, the rubber gasket 35 reduces the abrasion to the inner side wall of the pipe fitting; an adjusting hand screw 36 is fixedly arranged on the upper end surface of the internal thread tube 21; the position of the internal thread pipe 21 is adjusted by rotating the adjusting hand screw 36; the driving motor 7, the adjusting motor 14 and the rotating motor 26 are all connected with an external power supply.

The working principle of the specific embodiment is as follows: when feeding, the upper end of the internal threaded pipe 21 is exposed at the right side of the upper sealing plate 17, the internal threaded pipe 21 is rotated upwards to enable the side walls of the first connecting rod 23 and the second connecting rod 25 to be close to the screw rod 20, the tubular workpiece is sleeved on the outer sides of the internal threaded pipe 21 and the screw rod 20, and the internal threaded pipe 21 is rotated downwards to enable the end part connected with the first connecting rod 23 and the second connecting rod 25 to be propped against the inner side wall of the tubular workpiece; after the feeding is finished, the adjusting motor 14 is turned on, the output end of the adjusting motor 14 drives the elliptical wheel 13 to rotate, the side wall of the elliptical wheel 13 is attached to the guide wheel 12, the elliptical wheel 13 drives the adjusting rod 8 on the right side to move up and down, the adjusting rods 8 on the left side and the right side synchronously move due to the fact that the half gears 11 at the end portions of the linkage rods 9 are meshed, when the adjusting rods 8 ascend, the adjusting rods 8 synchronously move towards the direction close to the supporting columns 4, at the moment, the upper end of the internal thread tube 21 is located on the lower side of the bottom face of the upper sealing plate 17, the tubular workpiece cannot fall out of the upper end of the internal thread tube 21, and the adjusting motor 14 stops working; open driving motor 7 and rotating electrical machines 26, driving gear 6 is rotated to driving motor 7's output, because driving gear 6 meshes with ring gear 5 mutually, support column 4 rotates on the upper portion of gear box 2, and rotating electrical machines 26 passes through synchronizing gear 27 and drive chain's transmission effect, drives screw rod 20 and rotates, and then drives the pipe fitting and rotate.

After adopting above-mentioned structure, this embodiment beneficial effect does:

1. the included angle between the first connecting rod 23 and the second connecting rod 25 is adjusted by rotating the position of the internal threaded pipe 21, so that the connecting end part of the first connecting rod 23 and the second connecting rod 25 is abutted against the inner side wall of the pipe fitting, the tubular workpiece can be well clamped and fixed, and the tubular workpiece is effectively prevented from falling in the film coating process;

2. the driving motor 7 and the rotating motor 26 drive the pipe fitting to rotate while revolving, so that the coating is more uniform;

3. the position of the adjusting rod 8 is adjusted by driving the elliptical wheel 13 to rotate through the adjusting motor 14, and then the clamped pipe fitting is moved to the bottom of the upper sealing plate 17, so that the pipe fitting is not easy to fall off;

4. when a connecting rod 23 and a connecting rod 25 clamp the pipe fitting, the contact head 34 abuts against the inner side wall of the pipe fitting, and the contact area is increased.

The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.