Material supplementing mechanism

Abstract

The utility model relates to a feeding mechanism, in particular to a material supplementing mechanism, which solves the problem that the weight difference of actual materials in each packaging bag is large after the work of air exhaust, dust removal and the like is finished in the quantitative packaging of the existing powdery materials. One part enters the thick material supplementing pipe from the feeding hole in the top plate, and the other part enters the thin material supplementing pipe. An outlet of the thin material supplementing pipe is connected with a feeding pipe, one end of the feeding pipe is communicated with the thick material supplementing pipe, a spiral material supplementing rod is arranged in the thin material supplementing pipe, a rotating shaft of the spiral material supplementing rod is connected with the output end of a motor connected to one end of the feeding pipe, and the side wall of the thick material supplementing pipe is connected with an air hammer and a switch valve. Materials from the feeding port enter the thick material supplementing pipe and fall into a packaging bag from an outlet of the thick material supplementing pipe, and after work of air exhaust, dust removal and the like, the materials in the thin material supplementing pipe are conveyed into the thick material supplementing pipe through the feeding pipe and the spiral material supplementing rod, so that material supplementing is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a feeding mechanism, in particular to a material supplementing mechanism. BACKGROUND

[0002] In the packaging operation of powder material, the product is generally fed through a feeding mechanism, and in the feeding process, because the material will produce dust in the transmission process, affecting the air condition in the workshop, so generally the feeding mechanism will be provided with an air extraction and dust removal device, and with air extraction and dust removal, part of the material will be taken away, and there is still a part of the powder product attached to the inner wall of the feeding mechanism, so that the packaging precision is difficult to guarantee, resulting in a large difference in the weight of the product in each packaging bag, so it is necessary to supplement the material after each air extraction and dust removal, so that the powder material in each packaging bag reaches the target weight. SUMMARY

[0003] The utility model discloses a kind of material supplementing mechanisms, which is used to solve the problem that the actual material weight in each packaging bag is greatly different after the quantitative packaging of powder material is completed, such as air extraction, dust removal etc.

[0004] To achieve the above object, the utility model provides the following technical solutions:

[0005] A material supplementing mechanism, characterized in that it comprises a material supplementing frame, an air hammer, an on-off valve, a motor and a spiral material supplementing rod.

[0006] The material supplementing frame comprises a top plate, a thick material supplementing pipe and a thin material supplementing pipe connected to the bottom of the top plate, and a feeding port is provided on the top plate, with the inlet of the thick material supplementing pipe and the thin material supplementing pipe corresponding to the feeding port.

[0007] The air hammer and the on-off valve are both connected to the side wall of the thick material supplementing pipe, with the inlet of the on-off valve communicating with the inside of the thick material supplementing pipe, and the outlet of the on-off valve connected to a dust remover.

[0008] A feeding pipe is connected to the outlet of the thin material supplementing pipe, with the thin material supplementing pipe communicating with the feeding pipe.

[0009] The spiral material supplementing rod is located in the feeding pipe and corresponds to the outlet of the thin material supplementing pipe, and comprises a rotating shaft coaxially arranged with the feeding pipe and a spiral fin arranged on the outer wall of the rotating shaft.

[0010] Further, the plugging mechanism comprises a mounting table, a rotating arm, a cylinder and a cover door, the mounting table is arranged on the outer wall of the coarse material pipe and connected with the top of the feeding pipe, the inside of the mounting table is communicated with the inside of the coarse material pipe, the rotating arm comprises a rotating shaft extending into the inside of the mounting table and rotatingly arranged on the mounting table and a connecting arm connected with one end of the rotating shaft, the axis direction of the rotating shaft is perpendicular to the axis direction of the feeding pipe;

[0011] The fixed end of the cylinder is rotatingly arranged on the outer wall of the feeding pipe and the fine material pipe, and the movable end is connected with the connecting arm; the cover door comprises a curved arm, a cover plate and a rubber cover plate, one end of the curved arm is fixedly connected with the rotating shaft, the cover plate is connected with the inner side surface of the other end of the curved arm, and the rubber cover plate is connected with the inner side surface of the cover plate, and the rubber cover plate is used for plugging the outlet of the feeding pipe.

[0012] Further, the end of the feeding pipe connected with the motor is provided with a connecting flange plate, a speed reducer mounting seat is connected with the connecting flange plate, a speed reducer is connected with the speed reducer mounting seat, the output end of the motor is connected with the input end of the speed reducer, and the output end of the speed reducer is connected with the rotating shaft.

[0013] Further, the speed reducer mounting seat comprises a cylinder body and a butt flange arranged at one end of the cylinder body, the butt flange is connected with the connecting flange plate, the other end of the cylinder body is provided with a first mounting ring, a second mounting ring is arranged on the inner wall of the cylinder body close to the butt flange, the butt flange, the cylinder body, the first mounting ring and the second mounting ring are coaxially arranged, the speed reducer is fixed on the side wall of the cylinder body between the first mounting ring and the second mounting ring, the output end of the speed reducer is connected with the rotating shaft, and the rotating shaft is rotatingly connected with the first mounting ring and the second mounting ring respectively.

[0014] Further, a first bearing mounting seat is arranged between the central hole of the first mounting ring and the rotating shaft, the first bearing mounting seat comprises a first body and a first connecting flange arranged on the outer circumferential surface of the first body, the first connecting flange is connected with the outer side surface of the first mounting ring, a first aligning ball bearing is arranged between the first body and the rotating shaft, the first aligning ball bearing is sleeved on the rotating shaft, a butt protruding ring is arranged on the inner wall of the central hole of the first body close to the speed reducer, and the inner end surface of the first aligning ball bearing is butted against the butt protruding ring.

[0015] The connecting flange plate is connected to the outer wall of the feeding pipe, and a distance is left between the outer side surface of the connecting flange plate and the outer end surface of the feeding pipe, a second bearing mounting seat is arranged between the second mounting ring and the rotating shaft, the second bearing mounting seat comprises a second body and a second connecting flange arranged on the outer wall of the second body, the second connecting flange is connected to the outer side surface of the second mounting ring, an abutting ring is arranged on the outer side surface of the second connecting flange, the inner wall of the abutting ring abuts against the outer wall of the feeding pipe, and the outer end surface of the abutting ring abuts against the outer side surface of the connecting flange plate; a mounting ring groove is formed in the inner wall of the central hole of the second body away from the feeding pipe, an end cover is connected to the end of the second body away from the feeding pipe, a second self-aligning ball bearing is arranged in the mounting ring groove, the second self-aligning ball bearing is sleeved on the rotating shaft, one end of the second self-aligning ball bearing abuts against the groove bottom of the mounting ring groove, and the other end of the second self-aligning ball bearing abuts against the end cover.

[0016] Further, the end of the rotating shaft close to the first mounting ring is connected with a shaft sleeve, the shaft sleeve comprises an annular body and a shaft sleeve ring arranged on the outer wall of the annular body, one end of the shaft sleeve ring abuts against the rotating shaft, a gland is connected to the outer side surface of the first body, a thrust ball bearing is sleeved on the annular body and located between the gland and the shaft sleeve ring, and the other end of the shaft sleeve ring and the inner side surface of the gland respectively abut against two ends of the thrust ball bearing.

[0017] Further, water sealing rings are arranged between the first bearing mounting seat and the rotating shaft and between the second bearing mounting seat and the rotating shaft.

[0018] Further, an oil injection hole is radially formed on the outer wall of the second body, the oil injection hole is located between the second mounting ring and the end cover, an oil plug is screwed on the oil injection hole, and an inspection hole is formed on the cylinder between the first mounting ring and the second mounting ring.

[0019] Further, the switch valve is a pneumatic butterfly valve, and the rubber cover plate is a foamed rubber cover plate.

[0020] Compared with the prior art, the utility model has the advantages that:

[0021] (1) The feeding mechanism provided by this utility model divides the feeding into two parts: one part enters the coarse feeding pipe from the feeding port on the top plate, and the other part enters the fine feeding pipe. A feeding pipe is connected to the outlet of the fine feeding pipe, and one end of the feeding pipe is connected to the coarse feeding pipe. A spiral feeding rod is installed in the fine feeding pipe, and the shaft of the spiral feeding rod is connected to the output end of a motor connected to one end of the feeding pipe. An air hammer and a switch valve are connected to the side wall of the coarse feeding pipe. In this way, during feeding, the material from the inlet enters the coarse feeding pipe and falls into the packaging bag from the outlet of the coarse feeding pipe. After the work of degassing and dust removal, the weight of the existing quantitative packaging is not greater than the target weight. Feeding is carried out according to the difference between the actual weight of the material in the packaging bag and the target weight. Therefore, the material in the fine feeding pipe needs to be transported to the coarse feeding pipe. The spiral feeding rod is driven by the motor to rotate, and the material in the fine feeding pipe is sent to the coarse feeding pipe through the feeding pipe and the spiral feeding rod to realize feeding. This effectively improves the accuracy of the actual weight of the material in the packaging bag.

[0022] (2) The feeding mechanism provided by this utility model is also provided with a sealing mechanism. The cylinder in the sealing mechanism drives the rotating shaft of the rotating arm to rotate through the connecting arm of the rotating arm. The rotating shaft is mounted on the mounting platform. One end of the curved arm is connected to the rotating shaft. The cover plate is connected to the inner side of the other end of the curved arm. The rubber cover plate is connected to the inner side of the cover plate. When the rotating shaft rotates, it can drive the curved arm to rotate, and then drive the cover plate to rotate. When the cover plate rotates to the feed pipe outlet position, the rubber cover plate can seal it to prevent material leakage.

[0023] (3) The feeding mechanism provided by this utility model has an oil injection hole radially opened on the outer wall of the second body. The oil injection hole is located between the second mounting ring and the end cover. An oil plug is screwed on the oil injection hole. An inspection hole is opened on the cylinder located between the first mounting ring and the second mounting ring. The oil plug can be unscrewed through the inspection hole and oil can be injected into the oil injection hole to lubricate the second self-aligning ball bearing and ensure its smooth rotation.

[0024] (4) The feeding mechanism provided by this utility model is provided with water-based sealing rings between the first bearing mounting seat and the rotating shaft and between the second bearing mounting seat and the rotating shaft, which can effectively protect the two self-aligning ball bearings from corrosion and material leakage that could damage the bearings. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of a feeding mechanism according to the present invention;

[0026] Figure 2 This is a cross-sectional view of an embodiment of the present utility model;

[0027] Figure 3 for Figure 2 A magnified view of part A;

[0028] Figure 4 For Figure 2 The local enlarged view of B in the figure;

[0029] Figure 5 For the three-dimensional structure schematic view of the speed reducer mounting seat in the embodiment of the utility model

[0030] Figure 6 For the three-dimensional structure schematic view of the spiral material supplementing rod in the embodiment of the utility model;

[0031] Figure 7 For the three-dimensional structure schematic view of the rotary arm in the embodiment of the utility model;

[0032] Figure 8 For the three-dimensional structure schematic view of the cover door in the embodiment of the utility model.

[0033] The figure mark is explained as follows:

[0034] 1-top plate, 101-feed inlet; 2-fine material supplementing pipe, 3-coarse material supplementing pipe, 31-mounting table; 4-air hammer,

[0035] 5-on-off valve, 6-motor, 7-spiral material supplementing rod, 71-rotating shaft, 72-spiral piece; 8-feeding pipe, 81-connecting flange plate, 82-speed reducer mounting seat, 821-cylinder, 822-butting flange, 823-first mounting ring, 824-second mounting ring, 825-first body, 826-first connecting flange, 827-first self-aligning ball bearing, 828-second body, 829-second connecting flange, 830-end cover, 831-second self-aligning ball bearing; 9-rotary arm, 10-air cylinder, 11-curved arm, 12-cover plate, 121-rubber cover plate; 13-speed reducer, 14-water-based sealing ring, 15-oil plug, 16-shaft sleeve, 17-thrust ball bearing, 18-pressing cover. DETAILED DESCRIPTION

[0036] The utility model will be further explained in connection with the drawings and specific embodiments.

[0037] Referring to Figures 1-8 , the material supplementing mechanism of the utility model includes a material supplementing frame, and the structure of the material supplementing frame is as shown in the figure Figure 1 , which includes a top plate 1 and a coarse material supplementing pipe 3 and a fine material supplementing pipe 2 connected at the bottom of the top plate 1, a feed inlet 101 is arranged on the top plate 1, the feed inlet 101 corresponds to the inlet of the coarse material supplementing pipe 3 and the fine material supplementing pipe 2, an air hammer 4 and an on-off valve 5 are connected on the side wall of the coarse material supplementing pipe 3, in the embodiment, the on-off valve 5 is a pneumatic butterfly valve, the inlet thereof communicates with the inside of the coarse material supplementing pipe 3, and the outlet thereof communicates with a dust collector.

[0038] The outlet of the fine feed pipe 2 is connected to the feed pipe 8, and the fine feed pipe 2 and the feed pipe 8 are connected. One end of the feed pipe 8 is connected to the coarse feed pipe 3. A spiral feed rod 7 is provided inside the feed pipe 8. The spiral feed rod 7 is provided corresponding to the outlet of the fine feed pipe 2. The spiral feed rod 7 includes a rotating shaft 71 and a spiral blade 72 provided on the outer wall of the rotating shaft 71. The rotating shaft 71 is coaxial with the feed pipe 8.

[0039] To seal the outlet of the feed pipe 8 and prevent leakage when not in use, a sealing mechanism is provided, which includes an installation platform 31, a rotating arm 9, a cylinder 10, and a cover. The installation platform 31 is located on the outer wall of the coarse feed pipe 3 and is connected to the top of the feed pipe 8. The interior of the installation platform 31 is connected to the interior of the coarse feed pipe 3. The rotating arm 9 is structured as follows: Figure 7 As shown, it includes a rotating shaft that extends into and is rotatably mounted on the mounting platform 31, and a connecting arm connected to one end of the rotating shaft. The axial direction of the rotating shaft is perpendicular to the axial direction of the feeding pipe 8. The fixed end of the cylinder 10 is rotatably mounted on the outer wall of the feeding pipe 8 and the fine feed pipe 2, and the movable end is connected to the connecting arm. The cover structure is as follows: Figure 8 As shown, the device includes a crank arm 11, a cover plate 12, and a rubber cover plate 121. One end of the crank arm 11 is fixedly connected to the rotating shaft, and the cover plate 12 is connected to the inner side of the other end of the crank arm 11. The rubber cover plate 13 is connected to the inner side of the cover plate 12. The rubber cover plate 13 is made of foamed rubber, which allows for a tighter fit with the outlet of the feeding pipe 8 and a better sealing effect. When the cylinder 10 drives the rotating shaft of the rotating arm 9 to rotate via the connecting arm of the rotating arm 9, the rotating shaft is mounted on the mounting platform 31. When the rotating shaft rotates, it drives the crank arm 11 to rotate, which in turn drives the rubber cover plate 121 to rotate. When the rubber cover plate 121 rotates to the outlet position of the feeding pipe 8, it can seal it to prevent material leakage. When precise material replenishment is required, the cylinder 10 drives the crank arm 11 to rotate away from the feeding pipe 8, opening the outlet of the feeding pipe 8.

[0040] In the embodiment, the power source for driving the spiral feeding rod 7 to rotate is the motor 6 and the speed reducer 13. The output torque of the structure is large, and the rotation speed is slow, so that the discharging speed is easy to control. In order to fix the speed reducer 13, the speed reducer mounting seat 82 is arranged. The speed reducer 13 is connected with the speed reducer mounting seat 82. The output end of the motor 6 is connected with the input end of the speed reducer 13. The output end of the speed reducer 13 is connected with the rotating shaft 71. The connecting flange plate 81 is arranged at one end of the feeding pipe 8 connected with the speed reducer mounting seat 82. The speed reducer mounting seat 82 includes the cylinder body 821 and the butt joint flange 822 arranged at one end of the cylinder body 821. The butt joint flange 822 is connected with the connecting flange plate 81. The first mounting ring 823 is arranged at the other end of the cylinder body 821. The second mounting ring 824 is arranged on the inner wall of the cylinder body 821 close to the butt joint flange 822. The butt joint flange 822, the cylinder body 821, the first mounting ring 823 and the second mounting ring 824 are coaxially arranged. The speed reducer 13 is fixed on the side wall of the cylinder body 821 between the first mounting ring 823 and the second mounting ring 824. In the embodiment, the output end of the speed reducer 13 is a hollow output shaft. The rotating shaft 71 is connected with the hollow output shaft through a key. The rotating shaft 71 passes through the center of the hollow shaft and is rotatably connected with the first mounting ring 823 and the second mounting ring 824 respectively.

[0041] In order to realize the rotation connection of the rotating shaft 71 with the first mounting ring 823 and the second mounting ring 824, a bearing is needed. The first bearing mounting seat is arranged between the center hole of the first mounting ring 823 and the rotating shaft 71. The first bearing mounting seat includes the first body 825 and the first connecting flange 826 arranged on the outer circumferential surface of the first body 825. The first connecting flange 826 is connected with the outer side surface of the first mounting ring 823. The first self-aligning ball bearing 827 is arranged between the first body 825 and the rotating shaft 71. The first self-aligning ball bearing 827 is sleeved on the rotating shaft 71. The abutting convex ring is arranged on the inner wall of the center hole of the first body 825 close to the speed reducer 13. The inner end surface of the first self-aligning ball bearing 827 abuts against the abutting convex ring.

[0042] The connecting flange plate 81 is connected to the outer wall of the feeding pipe 8, and the outer side surface of the connecting flange plate 81 is spaced from the outer end surface of the feeding pipe 8. A second bearing mounting seat is arranged between the second mounting ring 824 and the rotating shaft 71, and the second bearing mounting seat comprises a second body 828 and a second connecting flange 829 arranged on the outer wall of the second body 828. The second connecting flange 829 is connected to the outer side surface of the second mounting ring 824. An abutting ring is arranged on the outer side surface of the second connecting flange 829. The inner wall of the abutting ring abuts against the outer wall of the feeding pipe 8, and the outer end surface of the abutting ring abuts against the outer side surface of the connecting flange plate 81. A mounting ring groove is formed in the inner wall of the central hole of the second body 828 away from the feeding pipe 8. An end cover 830 is connected to the end of the second body 828 away from the feeding pipe 8. A second self-aligning ball bearing 831 is arranged in the mounting ring groove. The second self-aligning ball bearing 831 is sleeved on the rotating shaft 71, and one end of the second self-aligning ball bearing 831 abuts against the bottom of the mounting ring groove, and the other end abuts against the end cover 830.

[0043] In order to limit the axial position of the rotating shaft 71, a shaft sleeve 16 is connected to the end of the rotating shaft 71 close to the first mounting ring 823. The shaft sleeve 16 comprises an annular body and a shaft sleeve ring arranged on the outer wall of the annular body. One end of the shaft sleeve ring abuts against the rotating shaft 71. A gland 18 is connected to the outer side surface of the first body 825. A thrust ball bearing 17 is sleeved on the annular body and located between the gland 18 and the shaft sleeve ring. The other end of the shaft sleeve ring and the inner side surface of the gland 18 abut against the two ends of the thrust ball bearing 17 respectively.

[0044] Water-based sealing rings 14 are arranged between the first bearing mounting seat and the rotating shaft 71 and between the second bearing mounting seat and the rotating shaft 71, so as to protect the first self-aligning ball bearing 827 and the second self-aligning ball bearing 831 from being damaged and corroded by the leaked material. An oil injection hole is radially formed in the outer wall of the second body 828 and located between the second mounting ring 824 and the end cover 830. An oil plug 15 is screwed on the oil injection hole. An inspection hole is formed in the cylinder 821 between the first mounting ring 823 and the second mounting ring 824. The oil plug 15 can be unscrewed through the inspection hole, and then oil can be injected into the oil injection hole, so as to lubricate the second self-aligning ball bearing 831 and ensure smooth rotation.

[0045] In use, the powder material is added through the feeding port, a part of the material falls into the packaging bag through the coarse feeding pipe 3, and the other part enters the fine feeding pipe 2. During the material falling process, the air hammer 4 works to vibrate the coarse feeding pipe 3, and the switch valve 5 is opened to suck the dust into the dust collector to prevent the material from sticking to the inner wall of the coarse feeding pipe 3. However, the coarse feeding pipe 3 is only responsible for falling most of the material into the packaging bag. When the actual weight of the quantitative packaging is not greater than the target weight, the material in the fine feeding pipe 2 needs to be conveyed to the coarse feeding pipe 3 for supplement according to the difference between the weight of the material in the packaging bag and the target weight. At this time, the air hammer 4 and the switch valve 5 are closed, the spiral feeding rod 7 is rotated by the motor 6, and the rubber cover plate 13 is rotated away from the feeding pipe 8 by the air cylinder 10. The spiral blade 72 of the spiral feeding rod 7 rotates and sends the material in the fine feeding pipe 2 to the feeding pipe 8, and then the material is sent into the coarse feeding pipe 3 through the outlet of the feeding pipe 8, so that the weight precision of the material in the packaging bag is effectively improved.

[0046] The above-described embodiments are merely used to describe the specific implementation of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements to the technical solutions of the present application made by those skilled in the art shall fall within the protection scope of the present application.

Claims

1. A replenishment mechanism characterized by: It comprises a feeding frame, an air hammer (4), an on-off valve (5), a motor (6) and a spiral feeding rod (7); The feeding frame comprises a top plate (1), a thick feeding pipe (3) and a thin feeding pipe (2) connected to the bottom of the top plate (1), and a feeding inlet (101) is arranged on the top plate (1), the feeding inlet (101) corresponds to the inlets of the thick feeding pipe (3) and the thin feeding pipe (2); The air hammer (4) and the on-off valve (5) are both connected to the side wall of the thick feeding pipe (3), the inlet of the on-off valve (5) is communicated with the inside of the thick feeding pipe (3), and the outlet of the on-off valve (5) is used for being connected to a dust collector; A feeding pipe (8) is connected to the outlet of the thin feeding pipe (2), and one end of the feeding pipe (8) is communicated with the thick feeding pipe (3); The spiral feeding rod (7) is arranged in the feeding pipe (8) and corresponds to the outlet of the thin feeding pipe (2), the spiral feeding rod (7) comprises a rotating shaft (71) coaxially arranged with the feeding pipe (8) and a spiral blade (72) arranged on the outer wall of the rotating shaft (71), and the motor (6) is fixed to the other end of the feeding pipe (8), and the output end of the motor (6) is connected with the rotating shaft (71).

2. The replenishment mechanism of claim 1, wherein: It also comprises a plugging mechanism, the plugging mechanism comprises a mounting table (31), a rotating arm (9), a pneumatic cylinder (10) and a cover door, the mounting table (31) is arranged on the outer wall of the thick feeding pipe (3), the mounting table (31) is connected to the top of the feeding pipe (8), the inside of the mounting table (31) is communicated with the inside of the thick feeding pipe (3), the rotating arm (9) comprises a rotating shaft extending into the inside of the mounting table (31) and rotatably arranged on the mounting table (31) and a connecting arm connected to one end of the rotating shaft, and the axis direction of the rotating shaft is perpendicular to the axis direction of the feeding pipe (8); The fixed end of the pneumatic cylinder (10) is rotatably arranged on the outer wall of the feeding pipe (8) and the thin feeding pipe (2), and the movable end is connected with the connecting arm; the cover door comprises a curved arm (11), a cover plate (12) and a rubber cover plate (121), one end of the curved arm (11) is fixedly connected to the rotating shaft, the cover plate (12) is connected to the inner side surface of the other end of the curved arm (11), and the rubber cover plate (121) is connected to the inner side surface of the cover plate (12), and the rubber cover plate (121) is used for plugging the outlet of the feeding pipe (8).

3. The replenishment mechanism of claim 2, wherein: One end of the feeding pipe (8) connected with the motor (6) is provided with a connecting flange plate (81), a speed reducer mounting seat (82) is connected to the connecting flange plate (81), a speed reducer (13) is connected to the speed reducer mounting seat (82), the output end of the motor (6) is connected with the input end of the speed reducer (13), and the output end of the speed reducer (13) is connected with the rotating shaft (71).

4. The replenishment mechanism of claim 3, wherein: The speed reducer mounting seat (82) includes a cylinder (821) and a butt flange (822) arranged at one end of the cylinder (821), the butt flange (822) is connected with the connecting flange plate (81), the other end of the cylinder (821) is provided with a first mounting ring (823), a second mounting ring (824) is arranged on the inner wall of the cylinder (821) close to the butt flange (822), the butt flange (822), the cylinder (821), the first mounting ring (823) and the second mounting ring (824) are coaxially arranged, the speed reducer (13) is fixed on the side wall of the cylinder (821) between the first mounting ring (823) and the second mounting ring (824), and the output end is connected with the rotating shaft (71), and the rotating shaft (71) is rotatably connected with the first mounting ring (823) and the second mounting ring (824) respectively.

5. The replenishment mechanism of claim 4, wherein: A first bearing mounting seat is arranged between the first mounting ring (823) and the rotating shaft (71), the first bearing mounting seat includes a first body (825) and a first connecting flange (826) arranged on the outer circumferential surface of the first body (825), the first connecting flange (826) is connected with the outer side surface of the first mounting ring (823), a first self-aligning ball bearing (827) is arranged between the first body (825) and the rotating shaft (71), the first self-aligning ball bearing (827) is sleeved on the rotating shaft (71), and a butt convex ring is arranged on the inner wall of the center hole of the first body (825) close to the speed reducer (13), and the inner end surface of the first self-aligning ball bearing (827) abuts against the butt convex ring; The connecting flange plate (81) is connected on the outer wall of the feeding pipe (8), and a distance is left between the outer side surface of the connecting flange plate (81) and the outer end surface of the feeding pipe (8), a second bearing mounting seat is arranged between the center hole of the second mounting ring (824) and the rotating shaft (71), the second bearing mounting seat includes a second body (828) and a second connecting flange (829) arranged on the outer wall of the second body (828), the second connecting flange (829) is connected with the outer side surface of the second mounting ring (824), a butt ring is arranged on the outer side surface of the second connecting flange (829), the inner wall of the butt ring abuts against the outer wall of the feeding pipe (8), the outer end surface of the butt ring abuts against the outer side surface of the connecting flange plate (81), a mounting ring groove is formed in the inner wall of the center hole of the second body (828) away from the feeding pipe (8), an end cover (830) is connected to the end of the second body (828) away from the feeding pipe (8), a second self-aligning ball bearing (831) is arranged in the mounting ring groove, the second self-aligning ball bearing (831) is sleeved on the rotating shaft (71), and one end of the second self-aligning ball bearing (831) abuts against the groove bottom of the mounting ring groove, and the other end abuts against the end cover (830).

6. The feeding mechanism of claim 5, wherein: The shaft sleeve (16) is connected to the end of the rotating shaft (71) near the first mounting ring (823), the shaft sleeve comprises an annular body and a shaft sleeve ring arranged on the outer wall of the annular body, one end of the shaft sleeve ring is in abutment with the rotating shaft (71), the gland (18) is connected to the outer side of the first body (825), the thrust ball bearing (17) is sleeved on the annular body, the thrust ball bearing (17) is located between the gland (18) and the shaft sleeve ring, the other end of the shaft sleeve ring and the inner side of the gland (18) are in abutment with the two ends of the thrust ball bearing (17) respectively.

7. The feeding mechanism of claim 6, wherein: The water sealing ring (14) is arranged between the first bearing mounting seat and the rotating shaft (71) and between the second bearing mounting seat and the rotating shaft (71).

8. The feeding mechanism of claim 7, wherein: The oil injection hole is radially arranged on the outer wall of the second body (828) and is located between the second mounting ring (824) and the end cover (830), the oil plug (15) is screwed on the oil injection hole, and the inspection hole is arranged on the cylinder (821) between the first mounting ring (823) and the second mounting ring (824).

9. The replenishment mechanism of claim 2, wherein: The switch valve (5) is a pneumatic butterfly valve, and the rubber cover plate (121) is a foamed rubber cover plate.

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