A quantitative delivery mechanism for scrub

Abstract

The present invention belongs to the field of quantitative delivery technology, and in particular to a quantitative delivery mechanism for scrub, wherein the quantitative delivery assembly includes a variable plate, a movable plate, a fixed plate, a feed pipe, a first electric telescopic rod, an extension bracket and a discharge pipe, wherein there are four variable plates, and the four variable plates are slidably connected to each other, the left side of the variable plate is in sliding contact with the movable plate, and the right side of the variable plate is in sliding contact with the fixed plate, the feed pipe is fixedly connected at the inner center position of one end of the fixed plate, and the discharge pipe is fixedly connected at the inner center position of one end of the movable plate, and the telescopic main shaft end of the first electric telescopic rod is fixedly connected to the variable plate through the extension bracket. By setting the quantitative delivery assembly, the quantitative delivery assembly can deliver the amount of scrub more accurately, and the quantitative delivery assembly has two delivery methods.

Description

Technical Field

[0001] The invention belongs to the technical field of quantitative delivery, and particularly relates to a quantitative delivery mechanism for scrub. Background Art

[0002] The abrasive paste used in industry is used when polishing workpieces. The dosage of polishing paste used is related to the size of the workpiece. The traditional method is to manually squeeze the abrasive paste out and apply it directly to the surface of the workpiece, and then polish it with a polishing wheel. The dosage of manually applied polishing paste is not easy to control, and the abrasive paste manually applied to the workpiece is generally distributed in dots or strips. It needs to be dispersed and evenly spread before polishing during subsequent polishing, which is more troublesome, especially the polishing work on the assembly line. Summary of the Invention

[0003] In order to solve the problems raised in the above background technology, the present invention provides a quantitative delivery mechanism for scrub, which has the characteristics of more accurate delivery of the amount of scrub and change of the shape of the delivered scrub.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solutions: a quantitative dispensing mechanism for scrub, wherein the quantitative dispensing assembly includes a variable plate, a movable plate, a fixed plate, a feed pipe, a first electric telescopic rod, an extension bracket and a discharge pipe;

[0005] There are four variable plates, and the four variable plates are slidably connected to each other. The left side of the variable plate is in sliding contact with the movable plate, and the right side of the variable plate is in sliding contact with the fixed plate. The feed pipe is fixedly connected to the inner center position of one end of the fixed plate, and the discharge pipe is fixedly connected to the inner center position of one end of the movable plate. The end of the telescopic main shaft of the first electric telescopic rod is fixedly connected to the variable plate through the extension bracket. The first electric telescopic rod can make the variable plate move in a 45-degree direction of itself, and the four variable plates move synchronously.

[0006] As a preferred quantitative dispensing mechanism of a scrub according to the present invention, the quantitative dispensing assembly also includes an air intake pipe, a rubber airbag, a limiting wire drawing, a hard ring and a flexible ring. The air intake pipe is fixedly connected to the inner side of one end of the fixed plate, and one end of the air intake pipe is fixedly connected to the rubber airbag. The rubber airbag is embedded and fixed on the inner side of one end of the fixed plate facing the variable plate, and the outward surface of the rubber airbag is fixedly connected to the hard ring and the flexible ring, and the hard ring and the flexible ring are alternately arranged.

[0007] As a preferred quantitative dispensing mechanism for a scrub according to the present invention, the quantitative dispensing assembly further includes an arc portion and an arc block, wherein the arc portion is provided at the portion where the end of one of the variable plates contacts the other variable plate, and one end of the arc portion is fixedly connected to the arc block.

[0008] As a preferred quantitative dispensing mechanism of a scrub according to the present invention, the quantitative dispensing assembly also includes a fixed bracket, a sliding rod, a sealing head and a first compression spring, one end of the fixed bracket is fixedly connected to the inner side of one end of the discharge pipe, the sliding rod is slidingly connected to the inner side of one end of the fixed bracket, one end of the sliding rod is fixedly connected to the sealing head, one end of the sealing head is in contact and sealed with the end of the discharge pipe, and the first compression spring is fixedly connected between the other end of the sealing head and the outer side of one end of the fixed bracket.

[0009] As a preferred quantitative dispensing mechanism of a scrub according to the present invention, the quantitative dispensing assembly also includes a permanent magnet block, a second compression spring, a single-bevel clamping rod and a permanent magnet ring, the permanent magnet block is slidably connected to the inner side of one end of the fixed bracket, the second compression spring is fixedly connected between the outer side of the top end of the permanent magnet block and the inner side of one end of the fixed bracket, the outer side of one end of the permanent magnet block is fixedly connected to the single-bevel clamping rod, the single-bevel clamping rod is slidably connected to the inner side of one end of the fixed bracket, the inclined surface of the single-bevel clamping rod is engaged with the inner side of one end of the sliding rod, and the outer end surface of the discharge pipe is slidably connected to the permanent magnet ring

[0010] As a preferred quantitative dispensing mechanism for scrub of the present invention, a flexible tube is fixedly connected to the outer side of the end of the discharge pipe.

[0011] As a preferred quantitative dispensing mechanism of a scrub according to the present invention, the quantitative dispensing assembly also includes a protrusion, a pressure sensor, a third compression spring and a piston. The protrusion is provided at one end of the feed pipe, the inner side of the top end of the protrusion is fixedly connected to the pressure sensor, the outer side of the bottom end of the pressure sensor is fixedly connected to the third compression spring, the outer side of the bottom end of the third compression spring is fixedly connected to the piston, and the outer side of one end of the piston is slidably connected to the inner side of one end of the protrusion.

[0012] As a preferred embodiment of the quantitative dispensing mechanism for scrub of the present invention, the four first electric telescopic rods are fixedly connected via an annular bracket.

[0013] As a preferred quantitative dispensing mechanism of the scrub of the present invention, the quantitative dispensing assembly also includes a limiting bracket, a connecting bracket, a second electric telescopic rod, a connecting rod and a connecting block, the outer side of one end of the limiting bracket is fixedly connected to the connecting bracket, the outer side of one end of the connecting bracket is fixedly connected to the outer side of one end of the annular bracket, the inner side of one end of the limiting bracket is fixedly connected to the second electric telescopic rod, the end of the telescopic main shaft of the second electric telescopic rod is fixedly connected to the connecting rod, the outer side of the bottom end of the connecting rod is fixedly connected to the connecting block, and the outer side of a section of the connecting block is fixedly connected to the outer side of one end of the movable plate.

[0014] As a preferred quantitative dispensing mechanism for scrub of the present invention, the outer side of one end of the fixing plate is fixedly connected to the connecting bracket via a mounting bracket.

[0015] Compared with the prior art, the beneficial effects of the present invention are: through the setting of the quantitative delivery assembly, the quantitative delivery assembly can deliver the amount of scrub more accurately, and the quantitative delivery assembly has two delivery methods. Whether it is manual polishing work or polishing work on the assembly line, the quantitative delivery assembly can do the job well. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a partial structural schematic diagram of the present invention;

[0019] Figure 3 Schematic diagram of the distribution structure of the first electric telescopic rod in the present invention;

[0020] Figure 4 Schematic diagram of the structure of the four variable plates in the present invention;

[0021] Figure 5 A three-dimensional diagram of the matching structure of the variable plate in the present invention;

[0022] Figure 6 Schematic diagram of the arrangement position of the arc portion in the present invention;

[0023] Figure 7 This is a schematic diagram of a first matching structure of four arc-shaped blocks in the present invention;

[0024] Figure 8 Schematic diagram of the second matching structure of the four arc-shaped blocks in the present invention;

[0025] Figure 9 Schematic diagram of the changing structure of the variable plate in the present invention;

[0026] Figure 10 Schematic diagram of the matching structure of the movable plate and the fixed plate in the present invention;

[0027] Figure 11 Schematic diagram of the internal structure of the discharge pipe in the present invention;

[0028] Figure 12 For the present invention Figure 11 Schematic diagram of the enlarged structure at A;

[0029] Figure 13 Schematic diagram of the installation structure of the limited wire drawing in the present invention;

[0030] Figure 14 Schematic diagram of the matching structure of the hard ring and the flexible ring in the present invention;

[0031] In the picture:

[0032] 1. Quantitative delivery assembly;

[0033] 21. Variable plate; 211. Movable plate; 212. Fixed plate; 213. Feed pipe; 214. First electric telescopic rod; 215. Extension bracket; 216. Discharge pipe;

[0034] 22. Intake pipe; 221. Rubber airbag; 222. Limit wire drawing; 223. Hard ring; 224. Flexible ring;

[0035] 23. arc-shaped portion; 231. arc-shaped block;

[0036] 24. Fixed bracket; 241. Sliding rod; 242. Sealing head; 243. First compression spring; 244. Permanent magnet block; 245. Second compression spring; 246. Single-bevel clamping rod; 247. Permanent magnet ring; 248. Flexible tube;

[0037] 25. Protrusion; 251. Pressure sensor; 252. Third compression spring; 253. Piston;

[0038] 26. Ring bracket;

[0039] 27. Limiting bracket; 271. Connecting bracket; 272. Second electric telescopic rod; 273. Connecting rod; 274. Connecting block;

[0040] 28. Install the bracket; DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] like Figure 1-14 As shown:

[0043] A quantitative dispensing mechanism for scrub, wherein the quantitative dispensing assembly 1 includes a variable plate 21, a movable plate 211, a fixed plate 212, a feed pipe 213, a first electric telescopic rod 214, an extension bracket 215 and a discharge pipe 216;

[0044] There are four variable plates 21, and the four variable plates 21 are slidably connected to each other. The left side of the variable plate 21 is in sliding contact with a movable plate 211, and the right side of the variable plate 21 is in sliding contact with a fixed plate 212. A feed pipe 213 is fixedly connected to the inner center position of one end of the fixed plate 212, and a discharge pipe 216 is fixedly connected to the inner center position of one end of the movable plate 211. The end of the telescopic main shaft of the first electric telescopic rod 214 is fixedly connected to the variable plate 21 through an extension bracket 215. The first electric telescopic rod 214 can make the variable plate 21 move in a 45-degree direction of itself, and the four variable plates 21 all move synchronously.

[0045] Further,

[0046] In an optional embodiment, the quantitative dispensing assembly 1 also includes an air intake pipe 22, a rubber airbag 221, a limiting wire drawing 222, a hard ring 223 and a flexible ring 224. The inner side of one end of the fixed plate 212 is fixedly connected to the air intake pipe 22, and one end of the air intake pipe 22 is fixedly connected to the rubber airbag 221. The rubber airbag 221 is embedded and fixed on the inner side of one end of the fixed plate 212 facing the variable plate 21. The outward surface of the rubber airbag 221 is fixedly connected to the hard ring 223 and the flexible ring 224, and the hard ring 223 and the flexible ring 224 are alternately arranged.

[0047] In an optional embodiment, the quantitative dispensing assembly 1 further includes an arc portion 23 and an arc block 231, wherein the end portion of one variable plate 21 in contact with the other variable plate 21 is provided with an arc portion 23, and one end of the arc portion 23 is fixedly connected to the arc block 231.

[0048] In an optional embodiment, the quantitative dispensing assembly 1 also includes a fixed bracket 24, a sliding rod 241, a sealing head 242 and a first compression spring 243. One end of the fixed bracket 24 is fixedly connected to the inner side of one end of the discharge pipe 216. The sliding rod 241 is slidingly connected to the inner side of one end of the fixed bracket 24. One end of the sliding rod 241 is fixedly connected to the sealing head 242. One end of the sealing head 242 is in contact and sealed with the end of the discharge pipe 216. The first compression spring 243 is fixedly connected between the other end of the sealing head 242 and the outer side of one end of the fixed bracket 24.

[0049] In an optional embodiment, the quantitative dispensing assembly 1 also includes a permanent magnet block 244, a second compression spring 245, a single-bevel clamping rod 246 and a permanent magnet ring 247. The inner side of one end of the fixed bracket 24 is slidably connected to the permanent magnet block 244, and the second compression spring 245 is fixedly connected between the top outer side of the permanent magnet block 244 and the inner side of one end of the fixed bracket 24. The outer side of one end of the permanent magnet block 244 is fixedly connected to the single-bevel clamping rod 246, and the single-bevel clamping rod 246 is slidably connected to the inner side of one end of the fixed bracket 24. The inclined portion of the single-bevel clamping rod 246 is engaged with the inner side of one end of the sliding rod 241, and the outer end surface of the discharge pipe 216 is slidably connected to the permanent magnet ring 247.

[0050] In an optional embodiment, a flexible tube 248 is fixedly connected to the outer side of the end of the discharge tube 216 .

[0051] In an optional embodiment, the quantitative dispensing assembly 1 also includes a protrusion 25, a pressure sensor 251, a third compression spring 252 and a piston 253. A protrusion 25 is provided at one end of the feed tube 213, and the inner side of the top end of the protrusion 25 is fixedly connected to the pressure sensor 251, and the outer side of the bottom end of the pressure sensor 251 is fixedly connected to the third compression spring 252. The outer side of the bottom end of the third compression spring 252 is fixedly connected to the piston 253, and the outer side of one end of the piston 253 is slidably connected to the inner side of one end of the protrusion 25.

[0052] In an optional embodiment, the four first electric telescopic rods 214 are fixedly connected via an annular bracket 26 .

[0053] In an optional embodiment, the quantitative dispensing assembly 1 also includes a limiting bracket 27, a connecting bracket 271, a second electric telescopic rod 272, a connecting rod 273 and a connecting block 274, the outer side of one end of the limiting bracket 27 is fixedly connected to the connecting bracket 271, the outer side of one end of the connecting bracket 271 is fixedly connected to the outer side of one end of the annular bracket 26, the inner side of one end of the limiting bracket 27 is fixedly connected to the second electric telescopic rod 272, the end of the telescopic main shaft of the second electric telescopic rod 272 is fixedly connected to the connecting rod 273, the outer side of the bottom end of the connecting rod 273 is fixedly connected to the connecting block 274, and a section of the outer side of the connecting block 274 is fixedly connected to the outer side of one end of the movable plate 211.

[0054] In an optional embodiment, the outer side of one end of the fixing plate 212 is fixedly connected to the connecting bracket 271 through the mounting bracket 28 .

[0055] In this embodiment, the abrasive paste used in industry is used when polishing workpieces. The dosage of the polishing paste used is related to the size of the workpiece. The traditional method is to manually squeeze the abrasive paste and apply it directly to the surface of the workpiece, and then use a polishing wheel to polish and polish. The dosage of the manually applied polishing paste is not easy to control, and the abrasive paste manually applied to the workpiece is generally distributed in dots or strips. It needs to be dispersed and evenly spread before polishing during subsequent polishing, which is particularly troublesome in polishing work on an assembly line.

[0056] By setting the quantitative feeding assembly 1, the quantitative feeding assembly 1 can more accurately feed the amount of scrub, and the quantitative feeding assembly 1 has two feeding methods. Whether it is manual polishing work or polishing work on the assembly line, the quantitative feeding assembly 1 can be well competent;

[0057] One end of the feed pipe 213 is connected to the extruder of the scrub, and the extruder is required to have an anti-backflow function. When the scrub needs to be quantitatively fed, the size of the space in the interlayer between the movable plate 211 and the fixed plate 212 and surrounded by the four variable plates 21 must be adjusted first, hereinafter referred to as the variable space. By energizing the four first electric telescopic rods 214 at the same time, the first electric telescopic rods 214 will drive the extension bracket 215 to move after being energized, and the extension bracket 215 will drive the variable plate 21 to move. When the four variable plates 21 move at the same time, the size of the variable space surrounded by the variable plates 21 will change, such as Figure 9As shown, when the four variable plates 21 move at a 45-degree angle at the same time, the variable plates 21 will move in a straight line along the trajectory line a, and the four variable plates 21 will not separate, so that when the variable plates 21 move, the variable space is always in a sealed state. When it is necessary to quantitatively feed the scrub, the size of the variable space can be changed to make the size of the variable space the same as the volume of the target scrub. The specific method is that in the initial state, the scrub is introduced into the inner side of the feed pipe 213 through the extruder. At this time, the size of the variable space should be 0, as shown in FIG. Figure 11 As shown, the arc portion 23 is able to contact the outer side of the feed pipe 213. Moreover, the arc block 231 is able to further fill the remaining space inside the variable space of the feed pipe 213, that is, when the four arc blocks 231 are in contact with each other, they can just block the discharge end of the feed pipe 213, so that in the initial state, the size of the variable space is 0. At this time, when the scrub is introduced into the inside of the variable space through the extruder, the end of the feed pipe 213 is blocked, so that the scrub fluid pressure inside the feed pipe 213 will increase. The pressure increase will push the piston 253 to overcome the elastic force of the third compression spring 252 to move. The elastic force of the third compression spring 252 will act on the upper side of the pressure sensor 251, so that the pressure sensor 251 detects the pressure of the fluid. When the pressure sensor 251 detects that the pressure of the fluid reaches a certain value, it means that the flow of the scrub is blocked and cannot continue to circulate (hereinafter referred to as the upper limit value). At this time, the four first electric telescopic rods 214 need to be energized at the same time. According to the above principle, the first When the electric telescopic rod 214 is energized, the variable plate 21 moves, thereby changing the size of the variable space. As the size of the variable space increases, the fluid pressure inside the feed pipe 213 decreases. According to the above principle, the pressure sensor 251 can detect that when the fluid pressure drops to a certain value, but not to 0, the power supply to the first electric telescopic rod 214 should be stopped, so that the variable space stops changing. However, since the scrub continues to be introduced, after a short period of time, the fluid pressure detected by the pressure sensor 251 will reach the upper limit value again. According to the above principle, it is necessary to continue to energize the first electric telescopic rod 214 to continue to increase the variable space. This cycle continues until the size of the variable space reaches the target size. When the pressure sensor 251 detects that the fluid pressure has reached the upper limit value, the power supply to the first electric telescopic rod 214 is stopped, and the introduction of scrub into the feed pipe 213 through the extruder is stopped. At this time, the volume of scrub stored in the variable space is the target volume that needs to be quantitatively dosed.

[0058] In the first embodiment, when the volume of scrub stored inside the variable space reaches the target volume that needs to be quantitatively dosed, the permanent magnet ring 247 is manually moved to move the permanent magnet ring 247 to the position closest to the permanent magnet block 244. At this time, the permanent magnet block 244 is affected by the magnetic force of the permanent magnet ring 247 and overcomes the elastic force of the second compression spring 245 to move upward. The upward movement of the permanent magnet block 244 drives the single-bevel clamping rod 246 to move upward. The upward movement of the single-bevel clamping rod 246 will separate from the sliding rod 241. At this time, the sliding rod 241 can move without being restricted by the engagement of the single-bevel clamping rod 246, and then the first electric telescopic rod 214 is reversed. When the power is turned on, according to the above principle, the volume of the variable space can be reduced. When the volume of the variable space is reduced, the scrub inside the variable space will be squeezed, so that the scrub can be discharged from the discharge pipe 216. After being squeezed, the scrub will push the blocking head 242 to move. The blocking head 242 will drive the sliding rod 241 to move while overcoming the pressure of the first compression spring 243 to move, so that the blocking head 242 no longer blocks the end of the discharge pipe 216, and the scrub can be discharged from the discharge pipe 216. When the size of the variable space is 0, the scrub is completely squeezed out, thereby realizing the quantitative feeding of the scrub.

[0059] The second embodiment is suitable for applying the abrasive paste in the variable space directly to the target position, and is applicable to foil polishing. Since the abrasive paste needs to be applied to the surface of the moving foil during foil polishing, the abrasive paste should be applied evenly to the surface of the foil, rather than in dots or strips. It is better that the abrasive paste can just cover the width of the foil. As the foil moves, the abrasive paste can be evenly applied to the surface of the foil. Therefore, the width of the variable space needs to be exactly equal to the width of the foil.

[0060] When the volume of scrub stored inside the variable space is the target volume that needs to be quantitatively dosed, that is, the width of the variable space is exactly equal to the width of the foil, it is necessary to energize the second electric telescopic rod 272. After the second electric telescopic rod 272 is energized, it will drive the connecting rod 273 and thereby drive the connecting block 274 to move upward. The upward movement of the connecting block 274 will drive the movable plate 211 to move upward until the movable plate 211 moves upward and is completely separated from the variable plate 21 without contact. When the movable plate 211 moves upward, the scraping between the movable plate 211 and the variable plate 21 can prevent the scrub from staying on the surface of the movable plate 211. Due to the poor fluidity of the scrub, after the movable plate 211 is separated from the variable plate 21, the scrub will not come out of the variable space in the absence of external force. Disengagement, at this time move the quantitative delivery assembly 1, so that after the quantitative delivery assembly 1 moves, it drives the opening of the variable space close to the surface of the foil, that is, the surface position of the foil is at the position of the original movable plate 211, but there should be a certain gap between the foil and the variable plate 21, and the gap should be less than one millimeter. Then, gas is introduced into the inner side of the rubber airbag 221 through the air inlet pipe 22. After the gas is introduced, the rubber airbag 221 will expand. The expansion of the rubber airbag 221 will squeeze out the scrub in the variable space. At this time, the extruded scrub will use the opening area of ​​the variable space as the extrusion port, so that the scrub can be extruded over a large area. Since the width of the variable space is the same as the width of the foil at this time, the scrub can be evenly coated on the surface of the foil without dead angles, which is convenient for subsequent Polishing work, but in order to prevent the rubber airbag 221 from contacting the foil after expansion, a limiting wire drawing 222 is set on the inner side of the rubber airbag 221. When the rubber airbag 221 expands to a certain thickness, the rubber airbag 221 will be affected by the limiting wire drawing 222 and cannot continue to thicken, thereby preventing the outer surface of the rubber airbag 221 from extending outside the variable space, and further preventing the rubber airbag 221 from contacting the foil surface. Preferably, the maximum thickness of the rubber airbag 221 after expansion should be the same as the width of the variable plate 21, in order to achieve that after the rubber airbag 221 expands, the rubber airbag 221 can squeeze out all the scrub inside the variable space, avoiding excess scrub staying inside the variable space, that is, avoiding scrub Attached to the surface of the variable plate 21, it can be achieved by alternating the hard ring 223 and the flexible ring 224. Both the hard ring 223 and the flexible ring 224 are square, and their shapes are the same as the shape of the variable space. When the rubber airbag 221 is inflated, if the hard ring 223 at this time can just contact the surface of the variable plate 21, then the hard ring 223 can directly scrape off the scrub on the surface of the variable plate 21. If the rubber airbag 221 is inflated, the hard ring 223 at this time cannot directly contact the surface of the variable plate 21, then the flexible ring 224 at this time will contact the surface of the variable plate 21. Since the flexible ring 224 is supported by the closest hard ring 223, the flexible ring 224 at this time can contact the variable plate 21 with a certain pressure.Thus, when the flexible ring 224 moves with the expansion of the rubber airbag 221, the flexible ring 224 can also scrape off the scrub on the surface of the variable plate 21. It should be understood that since the size of the variable space can be changed, no matter how the variable space changes, the shape of the variable space is always a square. Setting the hard ring 223 and the flexible ring 224 into squares allows the hard ring 223 and the flexible ring 224 not pressed by the variable plate 21 to move inside the variable space, while the hard ring 223 and the flexible ring 224 pressed by the variable plate 21 cannot move. The flexible ring 224 can be stretched and deformed together with the rubber airbag 221.

[0061] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A quantitative dispensing mechanism for scrub, characterized by: The quantitative feeding assembly (1) includes a variable plate (21), a movable plate (211), a fixed plate (212), a feed pipe (213), a first electric telescopic rod (214), an extension bracket (215) and a discharge pipe (216); There are four variable plates (21), and the four variable plates (21) are slidably connected to each other. The left side of the variable plate (21) is in sliding contact with the movable plate (211), and the right side of the variable plate (21) is in sliding contact with the fixed plate (212). The feed pipe (213) is fixedly connected to the center position of the inner side of one end of the fixed plate (212), and the discharge pipe (216) is fixedly connected to the center position of the inner side of one end of the movable plate (211). The end of the telescopic main shaft of the first electric telescopic rod (214) is fixedly connected to the variable plate (21) through the extension bracket (215). The first electric telescopic rod (214) can make the variable plate (21) move in a 45-degree direction of itself. The four variable plates (21) all move synchronously. An annular bracket (26) is provided between the four groups of the first electric telescopic rods (214); The quantitative dispensing assembly (1) further comprises an air intake pipe (22), a rubber airbag (221), a limit wire drawing (222), a hard ring (223) and a flexible ring (224); the air intake pipe (22) is fixedly connected to the inner side of one end of the fixed plate (212); the rubber airbag (221) is fixedly connected to the inner side of one end of the fixed plate (212) facing the variable plate (21); the hard ring (223) and the flexible ring (224) are fixedly connected to the outer surface of the rubber airbag (221); The quantitative dispensing assembly (1) further comprises an arc portion (23) and an arc block (231), wherein the arc portion (23) is provided at a portion where an end portion of one variable plate (21) contacts another variable plate (21); The quantitative dispensing assembly (1) further comprises a fixed bracket (24), a sliding rod (241), a plugging head (242) and a first compression spring (243); one end of the fixed bracket (24) is fixedly connected to the inner side of one end of the discharge pipe (216); the sliding rod (241) is slidably connected to the inner side of one end of the fixed bracket (24); and one end of the sliding rod (241) is fixedly connected to the plugging head (242); The quantitative dispensing assembly (1) further comprises a permanent magnet block (244), a second compression spring (245), a single-bevel clamping rod (246) and a permanent magnet ring (247); the permanent magnet block (244) is slidably connected to the inner side of one end of the fixed bracket (24); the second compression spring (245) is fixedly connected between the outer side of the top end of the permanent magnet block (244) and the inner side of one end of the fixed bracket (24); and the single-bevel clamping rod (246) is fixedly connected to the outer side of one end of the permanent magnet block (244); The quantitative dispensing assembly (1) further comprises a limiting bracket (27), a connecting bracket (271), a second electric telescopic rod (272), a connecting rod (273) and a connecting block (274), wherein the outer side of one end of the limiting bracket (27) is fixedly connected to the connecting bracket (271), the outer side of one end of the connecting bracket (271) is fixedly connected to the outer side of one end of the annular bracket (26), the inner side of one end of the limiting bracket (27) is fixedly connected to the second electric telescopic rod (272), the end of the telescopic main shaft of the second electric telescopic rod (272) is fixedly connected to the connecting rod (273), and the outer side of the bottom end of the connecting rod (273) is fixedly connected to the connecting block (274).

2. The quantitative dispensing mechanism for scrub according to claim 1, characterized in that: The hard rings (223) and the flexible rings (224) are arranged alternately.

3. The quantitative dispensing mechanism for scrub according to claim 2, characterized in that: One end of the arc-shaped portion (23) is fixedly connected to the arc-shaped block (231).

4. The quantitative dispensing mechanism for scrub according to claim 3, characterized in that: One end of the plugging head (242) contacts and seals the end of the discharge pipe (216), and the first compression spring (243) is fixedly connected between the other end of the plugging head (242) and the outer side of one end of the fixed bracket (24).

5. The quantitative dispensing mechanism for scrub according to claim 4, characterized in that: The single-bevel clamping rod (246) is slidably connected to the inner side of one end of the fixed bracket (24), the inclined portion of the single-bevel clamping rod (246) is engaged with the inner side of one end of the sliding rod (241), and the outer end surface of the discharge pipe (216) is slidably connected to the permanent magnet ring (247).

6. The quantitative dispensing mechanism for scrub according to claim 5, characterized in that: A flexible tube (248) is fixedly connected to the outer side of the end of the discharge tube (216).

7. The quantitative dispensing mechanism for scrub according to claim 6, characterized in that: The quantitative dispensing assembly (1) further comprises a protrusion (25), a pressure sensor (251), a third compression spring (252) and a piston (253). One end of the feed pipe (213) is provided with the protrusion (25), the inner side of the top end of the protrusion (25) is fixedly connected to the pressure sensor (251), the outer side of the bottom end of the pressure sensor (251) is fixedly connected to the third compression spring (252), the outer side of the bottom end of the third compression spring (252) is fixedly connected to the piston (253), and the outer side of one end of the piston (253) is slidably connected to the inner side of one end of the protrusion (25).

8. The quantitative dispensing mechanism for scrub according to claim 1, characterized in that: The four first electric telescopic rods (214) are fixedly connected via an annular bracket (26).

9. The quantitative dispensing mechanism for scrub according to claim 8, characterized in that: An outer portion of a section of the connecting block (274) is fixedly connected to an outer portion of one end of the movable plate (211).

10. The quantitative dispensing mechanism for scrub according to claim 9, characterized in that: The outer side of one end of the fixing plate (212) is fixedly connected to the connecting bracket (271) via a mounting bracket (28).

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