Device for detecting position degree of converter part of harvester

Abstract

The utility model relates to the field of location degree detection, in particular to a harvester converter part location degree detection device, and aims to overcome the defects that a plurality of positions of a harvester converter part are inconvenient to detect and the detection accuracy is low in the prior art, the following scheme is provided: the harvester converter part location degree detection device comprises a base, and a through groove is formed in the base; a through groove is formed in the base, a first rotating shaft is rotationally installed in the through groove, a first rotary knob is fixedly installed at one end of the first rotating shaft, a first collecting hole is formed in the base, and a protective cover is fixedly installed on the first rotating shaft; the number of the supporting legs is four, the four supporting legs are fixedly installed at the bottom of the base, a collecting box is fixedly installed at the bottom of the base, a second collecting hole is formed in the top of the collecting box, and the same collecting pipe is fixedly installed in the first collecting hole and the second collecting hole; according to the invention, multiple positions of the harvester converter part can be conveniently detected, and the detection accuracy is improved.

Description

Technical Field

[0001] The present application relates to the field of position detection, and in particular to a device for detecting the position of a harvester converter part. Background Art

[0002] The converter is a key part of the harvester. It is used in the converter system of various types of agricultural machinery harvesters. It relies on it to transmit its related combined parts. The parts include assembly holes and part assembly end faces. In actual production, the position requirements of both the assembly holes and part assembly end faces are very high. The two need to have precise relative positions. Once the relative positions of the two do not meet the requirements, it is easy for the parts to be unable to be assembled or the gap after assembly is too large to affect the conduction effect. The conduction effect is affected and it is easy to cause safety accidents. Therefore, the detection of the position of the two is very important.

[0003] The patent document with the publication number CN215447650U discloses a position detection fixture for the parts of a harvester converter, including a base plate, a positioning plate and a fixing plate arranged on the base plate, the positioning plate is respectively provided with a main positioning pin, a first positioning pin, a second positioning pin and a third positioning pin corresponding to the assembly hole, the first positioning hole, the second positioning hole and the third positioning hole of the converter part, the fixing plate is provided with a threaded push pin, the detection plate is located between the fixing plate and the positioning plate and is used to abut against the end face of the converter part, and a detection card block is provided between the fixing plate and the detection plate. The utility model realizes rapid detection of the position of the parts of the harvester converter by positioning the assembly hole and the assembly end face of the parts respectively, and uses the detection card block to realize rapid detection of the position of the parts of the harvester converter, and can accurately and quickly identify whether the position of the parts is qualified, which not only improves the detection efficiency, but also ensures very good detection accuracy, and ensures the installation and use effect of the parts of the harvester converter.

[0004] However, the above-mentioned device for detecting the position of the harvester converter parts is not convenient for detecting multiple positions of the harvester converter parts, and the detection accuracy is low. Summary of the invention

[0005] The utility model aims to solve the shortcomings of the prior art that it is inconvenient to detect multiple positions of harvester converter parts and the detection accuracy is low, and proposes a device for detecting the position of harvester converter parts.

[0006] The present application provides a device for detecting the position of a harvester converter part using the following technical solution:

[0007] A device for detecting the position of a harvester converter part, comprising:

[0008] A base, wherein a through slot is formed on the base, and a first rotating shaft is rotatably mounted in the through slot, a first knob is fixedly mounted on one end of the first rotating shaft, a first collecting hole is formed on the base, and a protective cover is fixedly mounted on the first rotating shaft;

[0009] Support legs, four support legs are provided, and the four support legs are fixedly installed at the bottom of the base, a collection box is fixedly installed at the bottom of the base, and a second collection hole is opened at the top of the collection box, and the same collection pipe is fixedly installed in the first collection hole and the second collection hole;

[0010] Support columns, two of which are fixedly mounted on the top of the base, one end of the two support columns being fixedly mounted with a top plate, and a first groove being formed at the bottom of the top plate;

[0011] The cleaning mechanism is rotatably mounted on the support column.

[0012] Furthermore, a fixed block is fixedly installed on one of the four supporting legs, and a filter plate and a support block are fixedly installed on the inner wall of the collecting box, a first driving motor is fixedly installed on the bottom inner wall of the collecting box, a second rotating shaft is rotatably installed on the support block, and the output shaft of the first driving motor is fixedly connected to the second rotating shaft, and a plurality of fan blades are fixedly installed on the second rotating shaft.

[0013] Furthermore, a first rotating shaft is rotatably mounted on one of the two supporting columns, and a crank handle is fixedly mounted on one end of the first rotating shaft, a first rotating disk is fixedly mounted on the other end of the first rotating shaft, and a first threaded hole is provided on the other supporting column of the two supporting columns, a first screw rod is threadedly connected to the first threaded hole, and a second knob is fixedly mounted on one end of the first screw rod, a fixing plate is fixedly mounted on the other end of the first screw rod, and a second groove is provided on the fixing plate, a second rotating disk is rotatably mounted in the second groove, a second rotating shaft is fixedly mounted on the second rotating disk, and the second rotating shaft is rotatably mounted in the second groove.

[0014] Furthermore, two second threaded holes are provided on the top plate, and a second screw rod is threadedly connected in the two second threaded holes, a third knob is fixedly installed on one end of the two second screw rods, and a support plate is fixedly installed on the other end of the two second screw rods, a third groove is provided at the bottom of the two support plates, and a pressure plate is slidably installed in the two third grooves, two buffer springs are fixedly installed on the two pressure plates, and one end of the four buffer springs is respectively fixedly installed in the two third grooves.

[0015] Furthermore, a first reciprocating screw is rotatably installed in the first groove, and a threaded rod is threadedly connected to the first reciprocating screw, a rectangular groove is provided on the threaded rod, and a third rotating shaft is rotatably installed in the rectangular groove, a fourth knob is fixedly installed on one end of the third rotating shaft, and a detection needle is fixedly installed on the third rotating shaft, and a display screen is fixedly installed on the detection needle.

[0016] Furthermore, a first sprocket is fixedly mounted on the first rotating shaft, and a first chain is meshed with the first sprocket, and a second sprocket is fixedly mounted on the first reciprocating screw rod.

[0017] Furthermore, the cleaning mechanism includes a sliding rod, and the sliding rod is fixedly mounted on two supporting columns, the same second reciprocating screw is rotatably mounted on the two supporting columns, and a threaded block is threadedly connected to the second reciprocating screw, the threaded block is slidably mounted on the sliding rod, and a cleaning brush is fixedly mounted on the sliding rod.

[0018] Furthermore, a transmission shaft is rotatably mounted on the fixed block, and the transmission shaft is rotatably mounted on the base, and a worm is fixedly mounted on one end of the transmission shaft, and the worm is rotatably mounted on the base, and the worm is meshed with a worm wheel, and the worm wheel is fixedly mounted on the second reciprocating screw.

[0019] Furthermore, a third sprocket is fixedly mounted on the output shaft of the first driving motor, and the third sprocket is meshed with a second chain, the second chain is meshed with a fourth sprocket, and the fourth sprocket is fixedly mounted on the transmission shaft.

[0020] Furthermore, a fixed table is fixedly installed on one side of the collecting box, and a second driving motor is fixedly installed on the fixed table, material guide plates corresponding to the filter plates are fixedly installed on both sides of the collecting box, and a dustproof plate is fixedly installed on the inner wall of the collecting box, a sliding groove is provided at the bottom of the dustproof plate, and a third reciprocating screw is rotatably installed in the sliding groove, the output shaft of the second driving motor is fixedly connected to the third reciprocating screw, and a slider is threadedly connected to the third reciprocating screw, the slider is slidably installed in the sliding groove, and a scraper is fixedly installed on the slider.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. The dust on the parts of the harvester converter can be cleaned by a cleaning brush, and at the same time, the first driving motor drives the second rotating shaft to rotate, and the second rotating shaft drives multiple fan blades to rotate, so as to suck the dust into the collection box;

[0023] 2. The first reciprocating screw rod can be used to drive the threaded rod to move back and forth, and the threaded rod can drive the detection needle to move back and forth, so that the detection needle can detect multiple positions of the harvester converter parts, thereby improving the accuracy of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a front cross-sectional schematic diagram of a device for detecting the position of a harvester converter part in the first embodiment of the present application;

[0025] Figure 2 It is a side structural schematic diagram of a device for detecting the position of a harvester converter part in the first embodiment of the present application;

[0026] Figure 3 It is a schematic diagram of the worm gear structure of a device for detecting the position of a harvester converter part in the first embodiment of the present application;

[0027] Figure 4 yes Figure 1 A magnified schematic diagram of part A;

[0028] Figure 5 It is a schematic diagram of the three-dimensional structure of a collection box of a device for detecting the position of a harvester converter part in Example 1 of the present application.

[0029] Figure numerals: 1, base; 2, first rotating shaft; 3, first knob; 4, protective cover; 5, support leg; 6, collection box; 7, filter plate; 8, support block; 9, first drive motor; 10, second rotating shaft; 11, fixed block; 12, support column; 13, crank; 14, first rotating shaft; 15, first screw rod; 16, fixed plate; 17, second rotating shaft; 18, second turntable; 19, top plate; 20, second screw rod; 21, support plate; 22, pressure plate; 23, buffer spring; 2 4. First reciprocating screw; 25. Threaded rod; 26. Third rotating shaft; 27. Detection needle; 28. Display screen; 29. ​​First sprocket; 30. First chain; 31. Second sprocket; 32. Slide bar; 33. Second reciprocating screw; 34. Threaded block; 35. Transmission shaft; 36. Worm; 37. Worm wheel; 38. Third sprocket; 39. Second chain; 40. Fourth sprocket; 41. Second driving motor; 42. Guide plate; 43. Dustproof plate; 44. Third reciprocating screw; 45. Slider. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0031] Embodiment 1

[0032] Reference Figure 1-Figure 5 , a detection device for the position of a harvester converter part, comprising:

[0033] A base 1, a through slot is formed on the base 1, a first rotating shaft 2 is rotatably mounted in the through slot, a first knob 3 is fixedly mounted on one end of the first rotating shaft 2, a first collecting hole is formed on the base 1, and a protective cover 4 is fixedly mounted on the first rotating shaft 2;

[0034] Support legs 5, four support legs 5 are provided, and the four support legs 5 are fixedly installed at the bottom of the base 1, a collecting box 6 is fixedly installed at the bottom of the base 1, and a second collecting hole is opened at the top of the collecting box 6, and the same collecting pipe is fixedly installed in the first collecting hole and the second collecting hole;

[0035] Support columns 12, two support columns 12 are provided, and both support columns 12 are fixedly installed on the top of the base 1, and a same top plate 19 is fixedly installed on one end of the two support columns 12, and a first groove is opened at the bottom of the top plate 19;

[0036] The cleaning mechanism is rotatably mounted on the support column 12 .

[0037] Specifically, a fixed block 11 is fixedly installed on one of the four supporting legs 5, and a filter plate 7 and a support block 8 are fixedly installed on the inner wall of the collecting box 6, a first driving motor 9 is fixedly installed on the bottom inner wall of the collecting box 6, a second rotating shaft 10 is rotatably installed on the support block 8, and the output shaft of the first driving motor 9 is fixedly connected to the second rotating shaft 10, and a plurality of fan blades are fixedly installed on the second rotating shaft 10.

[0038] Specifically, a first rotating shaft 14 is rotatably mounted on one of the two supporting columns 12, and a crank handle 13 is fixedly mounted on one end of the first rotating shaft 14, a first turntable is fixedly mounted on the other end of the first rotating shaft 14, and a first threaded hole is opened on the other supporting column 12 of the two supporting columns 12, a first screw rod 15 is threadedly connected to the first threaded hole, and a second knob is fixedly mounted on one end of the first screw rod 15, a fixing plate 16 is fixedly mounted on the other end of the first screw rod 15, and a second groove is opened on the fixing plate 16, a second turntable 18 is rotatably mounted in the second groove, a second rotating shaft 17 is fixedly mounted on the second turntable 18, and the second rotating shaft 17 is rotatably mounted in the second groove.

[0039] Specifically, two second threaded holes are provided on the top plate 19, and second screw rods 20 are threadedly connected in the two second threaded holes, a third knob is fixedly installed on one end of the two second screw rods 20, and a support plate 21 is fixedly installed on the other end of the two second screw rods 20, a third groove is provided on the bottom of the two support plates 21, and a pressure plate 22 is slidably installed in the two third grooves, two buffer springs 23 are fixedly installed on the two pressure plates 22, and one end of the four buffer springs 23 is respectively fixedly installed in the two third grooves.

[0040] Specifically, a first reciprocating screw 24 is rotatably installed in the first groove, and a threaded rod 25 is threadedly connected to the first reciprocating screw 24. A rectangular groove is provided on the threaded rod 25, and a third rotating shaft 26 is rotatably installed in the rectangular groove. A fourth knob is fixedly installed on one end of the third rotating shaft 26, and a detection needle 27 is fixedly installed on the third rotating shaft 26, and a display screen 28 is fixedly installed on the detection needle 27.

[0041] Specifically, a first sprocket 29 is fixedly mounted on the first rotating shaft 14 , and a first chain 30 is meshed with the first sprocket 29 , and a second sprocket 31 is meshed with the first chain 30 , and the second sprocket 31 is fixedly mounted on the first reciprocating screw rod 24 .

[0042] Specifically, the cleaning mechanism includes a sliding rod 32, and the sliding rod 32 is fixedly installed on two support columns 12, the same second reciprocating screw rod 33 is rotatably installed on the two support columns 12, and the second reciprocating screw rod 33 is threadedly connected with a thread block 34, the thread block 34 is slidably installed on the sliding rod 32, and a cleaning brush is fixedly installed on the sliding rod 32.

[0043] Specifically, a transmission shaft 35 is rotatably mounted on the fixed block 11 , and the transmission shaft 35 is rotatably mounted on the base 1 , and a worm 36 is fixedly mounted on one end of the transmission shaft 35 , the worm 36 is rotatably mounted on the base 1 , and the worm 36 is meshed with a worm wheel 37 , and the worm wheel 37 is fixedly mounted on the second reciprocating screw 33 .

[0044] Specifically, a third sprocket 38 is fixedly mounted on the output shaft of the first driving motor 9 , and the third sprocket 38 is meshed with a second chain 39 , and the second chain 39 is meshed with a fourth sprocket 40 , and the fourth sprocket 40 is fixedly mounted on the transmission shaft 35 .

[0045] Specifically, a fixed table is fixedly installed on one side of the collecting box 6, and a second driving motor 41 is fixedly installed on the fixed table, guide plates 42 corresponding to the filter plates 7 are fixedly installed on both sides of the collecting box 6, and a dustproof plate 43 is fixedly installed on the inner wall of the collecting box 6, a slide groove is provided at the bottom of the dustproof plate 43, and a third reciprocating screw rod 44 is rotatably installed in the slide groove, the output shaft of the second driving motor 41 is fixedly connected to the third reciprocating screw rod 44, and a slider 45 is threadedly connected to the third reciprocating screw rod 44, the slider 45 is slidably installed in the slide groove, and a scraper is fixedly installed on the slider 45.

[0046] The implementation principle of the detection device for the position of a harvester converter part in the embodiment of the present application is as follows: the staff places the harvester converter part on the device, and manually turns the second knob, which drives the first screw rod 15 to rotate, and the first screw rod 15 drives the fixing plate 16 to move, and the fixing plate 16 drives the second turntable 18 to move, and the harvester converter part is clamped and fixed by the second turntable 18 and the first turntable. At this time, the first drive motor 9 is started, and the first drive motor 9 drives the third sprocket 38 to rotate, and the third sprocket 38 drives the fourth sprocket 40 to rotate through the second chain 39, and the fourth sprocket 40 drives the transmission shaft 35 to rotate, and the transmission shaft 35 drives the worm 36 to rotate, and the worm 36 drives the worm wheel 37 The worm gear 37 drives the second reciprocating screw rod 33 to rotate, and the worm gear 36 drives the worm gear 37 to rotate. The worm gear 37 drives the second reciprocating screw rod 33 to rotate, so that the rotation speed of the second reciprocating screw rod 33 can be reduced. The second reciprocating screw rod 33 drives the threaded block 34 to reciprocate, and the threaded block 34 drives the cleaning brush to reciprocate. At the same time, the crank handle 13 is manually rotated, and the crank handle 13 drives the first rotating shaft 14 to rotate, and the first rotating shaft 14 drives the first rotating disk to rotate, and the first rotating disk and the second rotating disk 18 drive the harvester converter parts to rotate, and the dust of the harvester converter parts is cleaned by the cleaning brush. At the same time, the first drive motor 9 drives the second rotating shaft 10 to rotate, and the second rotating shaft 10 drives multiple fan blades to rotate, so as to suck the dust into After cleaning, the first drive motor 9 is turned off. When the dust is collected in the collection box 6 and accumulates to a certain extent, the second drive motor 41 is started. The second drive motor 41 drives the third reciprocating screw rod 44 to rotate, and the third reciprocating screw rod 44 drives the slider 45 to move back and forth. The slider 45 drives the scraper to move back and forth, so that the dust on the filter plate 7 is cleaned out of the collection box 6 through the two guide plates 42. At this time, the two third knobs are manually turned, and the two third knobs respectively drive the two second screw rods 20 to rotate, and the two second screw rods 20 drive the support plate 21 to move. The two support plates 21 respectively drive one end of the two pressure plates 22. The two pressure plates 22 are in contact with the surface of the harvester converter parts through two buffer springs. The spring 23 is used for buffering. At this time, the fourth knob is manually turned, and the fourth knob drives the third rotating shaft 26 to rotate. The third rotating shaft 26 drives the detection needle 27 to rotate, so that the detection needle 27 contacts the surface of the harvester converter part. At this time, the crank handle 13 is manually turned, and the crank handle 13 drives the first rotating shaft 14 to rotate. The first rotating shaft 14 drives the first sprocket 29 to rotate. The first sprocket 29 drives the second sprocket 31 to rotate through the first chain 30. The second sprocket 31 drives the first reciprocating screw rod 24 to rotate. The first reciprocating screw rod 24 drives the threaded rod 25 to reciprocate. The threaded rod 25 drives the detection needle 27 to reciprocate, so that the detection needle 27 can detect multiple positions of the harvester converter parts, thereby improving the accuracy of the detection.

[0047] Embodiment 2

[0048] The difference between this embodiment and the first embodiment is that a synchronous belt conveyor is fixedly installed on the top of the base 1, and the harvester converter parts are placed on the synchronous belt conveyor. Automatic feeding is achieved through the synchronous belt conveyor, which reduces the workload of the staff.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A device for detecting the position of a harvester converter part, characterized in that: include: A base (1), wherein a through slot is formed on the base (1), and a first rotating shaft (2) is rotatably mounted in the through slot, a first knob (3) is fixedly mounted on one end of the first rotating shaft (2), a first collecting hole is formed on the base (1), and a protective cover (4) is fixedly mounted on the first rotating shaft (2); Support legs (5), four support legs (5) are provided, and the four support legs (5) are all fixedly mounted on the bottom of the base (1), a collection box (6) is fixedly mounted on the bottom of the base (1), a second collection hole is opened on the top of the collection box (6), and the same collection pipe is fixedly mounted in the first collection hole and the second collection hole; Support columns (12), two support columns (12) are provided, and the two support columns (12) are fixedly mounted on the top of the base (1), a same top plate (19) is fixedly mounted on one end of the two support columns (12), and a first groove is formed at the bottom of the top plate (19); The cleaning mechanism is rotatably mounted on the support column (12).

2. A device for detecting the position of a harvester converter part according to claim 1, characterized in that: A fixing block (11) is fixedly mounted on one of the four supporting legs (5), and a filter plate (7) and a supporting block (8) are fixedly mounted on the inner wall of the collecting box (6), a first driving motor (9) is fixedly mounted on the inner wall of the bottom of the collecting box (6), a second rotating shaft (10) is rotatably mounted on the supporting block (8), an output shaft of the first driving motor (9) is fixedly connected to the second rotating shaft (10), and a plurality of fan blades are fixedly mounted on the second rotating shaft (10).

3. A device for detecting the position of a harvester converter part according to claim 2, characterized in that: A first rotating shaft (14) is rotatably mounted on one of the two supporting columns (12), and a crank handle (13) is fixedly mounted on one end of the first rotating shaft (14), a first rotating disk is fixedly mounted on the other end of the first rotating shaft (14), and a first threaded hole is provided on the other supporting column (12) of the two supporting columns (12), a first screw rod (15) is threadedly connected to the first threaded hole, and a second knob is fixedly mounted on one end of the first screw rod (15), a fixing plate (16) is fixedly mounted on the other end of the first screw rod (15), and a second groove is provided on the fixing plate (16), a second rotating disk (18) is rotatably mounted in the second groove, and a second rotating shaft (17) is fixedly mounted on the second rotating disk (18), and the second rotating shaft (17) is rotatably mounted in the second groove.

4. A device for detecting the position of a harvester converter part according to claim 3, characterized in that: The top plate (19) is provided with two second threaded holes, and the second screw rods (20) are threadedly connected in the two second threaded holes, a third knob is fixedly mounted on one end of the two second screw rods (20), and a support plate (21) is fixedly mounted on the other end of the two second screw rods (20), a third groove is provided at the bottom of the two support plates (21), and a pressure plate (22) is slidably mounted in the two third grooves, two buffer springs (23) are fixedly mounted on the two pressure plates (22), and one end of the four buffer springs (23) is fixedly mounted in the two third grooves respectively.

5. A device for detecting the position of a harvester converter part according to claim 4, characterized in that: A first reciprocating screw rod (24) is rotatably mounted in the first groove, and a threaded rod (25) is threadedly connected to the first reciprocating screw rod (24). A rectangular groove is formed on the threaded rod (25), and a third rotating shaft (26) is rotatably mounted in the rectangular groove. A fourth knob is fixedly mounted on one end of the third rotating shaft (26), and a detection needle (27) is fixedly mounted on the third rotating shaft (26), and a display screen (28) is fixedly mounted on the detection needle (27).

6. A device for detecting the position of a harvester converter part according to claim 5, characterized in that: A first sprocket (29) is fixedly mounted on the first rotating shaft (14), and the first sprocket (29) is meshed with a first chain (30), the first chain (30) is meshed with a second sprocket (31), and the second sprocket (31) is fixedly mounted on the first reciprocating screw rod (24).

7. A device for detecting the position of a harvester converter part according to claim 6, characterized in that: The cleaning mechanism comprises a sliding rod (32), and the sliding rod (32) is fixedly mounted on two supporting columns (12), a second reciprocating screw rod (33) is rotatably mounted on the two supporting columns (12), a threaded block (34) is threadedly connected to the second reciprocating screw rod (33), the threaded block (34) is slidably mounted on the sliding rod (32), and a cleaning brush is fixedly mounted on the sliding rod (32).

8. The device for detecting the position of a harvester converter part according to claim 7, characterized in that: A transmission shaft (35) is rotatably mounted on the fixed block (11), and the transmission shaft (35) is rotatably mounted on the base (1). A worm (36) is fixedly mounted on one end of the transmission shaft (35), and the worm (36) is rotatably mounted on the base (1). The worm (36) is meshed with a worm wheel (37), and the worm wheel (37) is fixedly mounted on the second reciprocating screw (33).

9. A device for detecting the position of a harvester converter part according to claim 8, characterized in that: A third sprocket (38) is fixedly mounted on the output shaft of the first drive motor (9), and the third sprocket (38) is meshed with a second chain (39), the second chain (39) is meshed with a fourth sprocket (40), and the fourth sprocket (40) is fixedly mounted on the transmission shaft (35).

10. A device for detecting the position of a harvester converter part according to claim 9, characterized in that: A fixed platform is fixedly mounted on one side of the collecting box (6), and a second driving motor (41) is fixedly mounted on the fixed platform. Guide plates (42) corresponding to the filter plates (7) are fixedly mounted on both sides of the collecting box (6), and a dustproof plate (43) is fixedly mounted on the inner wall of the collecting box (6). A sliding groove is provided at the bottom of the dustproof plate (43), and a third reciprocating screw rod (44) is rotatably mounted in the sliding groove. The output shaft of the second driving motor (41) is fixedly connected to the third reciprocating screw rod (44), and a slider (45) is threadedly connected to the third reciprocating screw rod (44). The slider (45) is slidably mounted in the sliding groove, and a scraper is fixedly mounted on the slider (45).

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