Underground carry-scraper frame

Abstract

The invention relates to the technical field of carry-scrapers, and discloses an underground carry-scraper frame which comprises a rear frame and further comprises a connector rotationally connected to one end of the rear frame and a bucket arranged at one end of the connector, the connector comprises a front frame rotationally connected with the rear frame, and side positioning units are located on the two sides of a rotating shaft. And when the rotating shaft deviates to a set position, the transmission unit enables the side positioning unit and the upward pushing unit to reset the rotating shaft through the downward pressing piece and the extrusion strip. When the rotating shaft deviates, the transmission unit is used for pushing the downward pressing part, so that the compressed side positioning unit can extrude the extrusion strip to enable the upward pushing unit to move upwards when the rotating shaft deviates and the downward pressing part moves downwards at the same time, the production loss of underground equipment work is reduced, in addition, the safety of the equipment is enhanced, and the working efficiency is improved. Equipment faults and potential safety risks caused by offset are reduced, and the overall performance and reliability of equipment are improved.

Description

Technical Field

[0001] The invention relates to the technical field of scrapers, and in particular to an underground scraper frame. Background Art

[0002] A scraper loader is a machine used in earthwork construction. Its main functions include digging, transporting, unloading, filling and leveling. It uses a bucket to shovel the soil and loads the crushed soil into the bucket for transportation. It can complete the comprehensive operations of shoveling, loading, transporting, unloading, layered filling and local compaction.

[0003] However, in the prior art, since underground scrapers usually work in harsh construction environments, such as mud, sand, gravel, water, etc., these substances can easily enter the connecting shaft between the rotating arm and the front frame, resulting in increased wear. At the same time, during the construction process, the scraper often needs to bear a large load, which will increase the wear of the connecting shaft. Therefore, the underground scraper needs to be carefully inspected before use, and the scraper needs to be regularly maintained and inspected to ensure the normal operation of the lubrication system. Once the lubrication maintenance is insufficient, the connecting shaft lacks the necessary lubrication, thereby accelerating the wear, causing the connecting shaft and other components to gradually age. For scrapers working underground, the working environment is more severe, such as damp, dark, and small space. The wear of the scraper connecting shaft will not only affect the normal operation of the equipment, but also cause an offset between the connecting shaft and the front frame, causing the shovel arm to load, resulting in equipment failure, and even causing safety accidents. Usually, when a scraper has problems during use, it is easier to repair it in an open area on the ground, but it is difficult to repair it due to the small underground space, which will seriously affect the operation of the equipment.

[0004] To this end, an underground scraper frame is proposed, which can temporarily reset the connecting shaft to ensure smooth operation. Summary of the invention

[0005] The purpose of the present invention is to provide an underground scraper frame to solve the problem of shaft wear and deviation.

[0006] The technical solution of the present invention is: an underground scraper frame, including a rear frame, a connector rotatably connected to one end of the rear frame, and a bucket arranged at one end of the connector, the connector including a front frame rotatably connected to the rear frame, and two support arms arranged outside the front frame, two inner shells are symmetrically arranged inside the front frame, the interior of the two inner shells are both rotatably connected with a transmission unit, the interior of the inner shells is slidably connected with a down-pressing piece, the interior of the front frame is rotatably connected with a rotating shaft, the rotating shaft passes through the corresponding inner shell, the interior of the inner shell is slidably connected with a side positioning unit, the middle of the bottom end of the front frame is connected with an upward push unit, The inner shell is internally slidably connected to an extrusion strip, one end of the front frame is fixedly connected to the rotating shaft, and the other end of the front frame is connected to the bucket. The transmission unit, the lower pressure piece, the side positioning unit and the extrusion strip are each provided with two and are symmetrical about the central axis of the inner shell, the sliding directions of the lower pressure piece and the side positioning unit are perpendicular, the side positioning unit is located on both sides of the rotating shaft, the upper push unit is located below the rotating shaft, one end of the extrusion strip is in contact with the bottom end of the upper push unit, and the other end of the extrusion strip is located inside the bottom end of the lower pressure piece. When the rotating shaft is offset to the set position, the transmission unit uses the lower pressure piece and the extrusion strip to enable the side positioning unit and the upper push unit to reset the rotating shaft.

[0007] Furthermore, the transmission unit includes a rotating rod rotatably connected to the inner shell, a wheel sleeve rotatably connected to the bottom end of the rotating rod, a pressure block fixedly connected to one side of the top end of the rotating rod, a first spring rotatably connected between the inner shell and the rotating rod at both ends, and a torsion spring connected between the inner shell and the rotating rod, and the top of the pressure block is closed and the bottom is open.

[0008] Furthermore, an outer wheel is arranged on the outside of the rotating shaft, the wheel sleeve is located inside the outer wheel and the two are in close contact, and the wheel sleeve is located above the outer wheel.

[0009] Furthermore, the pressing member includes a straight rod slidably connected to the inner shell, and a pressing plate fixedly connected to the bottom end of the straight rod. A circular shaft is provided on one side of the straight rod, and the circular shaft extends to the bottom of the pressing block. A limited through groove and an inner notch are provided in the middle of the straight rod, and a magnet is provided at the bottom end of the straight rod.

[0010] Furthermore, the pushing-up unit includes a supporting arc plate arranged inside the inner shell, a third spring connected between the inner shell and the supporting arc plate, and an arc block fixedly connected to the bottom end of the supporting arc plate, two third springs are symmetrically arranged about the central axis of the supporting arc plate, both sides of the bottom end of the arc block are arc surfaces, and the arc block is in contact with the extrusion strip.

[0011] Furthermore, a convex strip is arranged on one side of the extrusion strip close to the lower pressing plate, an inclined groove is arranged at the bottom of the lower pressing plate, the convex strip is located inside the inclined groove, and a circular groove is arranged on the extrusion strip.

[0012] Furthermore, the side positioning unit includes a round block rod slidably connected to the inside of the inner slot, a second spring connected between the inner shell and the round block rod, and a side arc plate connected to one end of the round block rod close to the rotating shaft. The curvature of the arc surface of the side arc plate and the supporting arc plate close to the rotating shaft is equal to the curvature of the arc surface of the rotating shaft, and the vertical surface of the round block rod is roughened.

[0013] Furthermore, an arc block is slidably connected inside the straight rod, two return springs are connected between the arc block and the straight rod, the arc block and the return spring are located inside the inner notch, and the vertical surface of the arc block is roughened.

[0014] Furthermore, a cross bar is arranged inside the inner shell, a bar is arranged at the bottom end inside the inner shell, the cross bar passes through the limiting groove, and the bar is located inside the circular groove.

[0015] Furthermore, a square groove is provided at the inner bottom end of the inner shell, and the square groove is located directly below the lower pressure plate. The top shape of the inner groove is the same as the outer shape of the round rod, and the length below the inner groove is greater than the diameter of the round rod.

[0016] Beneficial effects of the present invention: By utilizing the transmission unit to push the lower pressure piece when the shaft deviates, the compressed side positioning unit can automatically position both sides of the shaft when the shaft deviates. At the same time, when the lower pressure piece moves downward, it squeezes the extrusion bar to move the upper push unit upward. The upper push unit is utilized to support the shaft to ensure that the equipment can continue to work normally, reduce equipment downtime caused by shaft problems, and reduce production losses of underground equipment. In addition, the safety of the equipment is enhanced, equipment failures and potential safety risks caused by deviation are reduced, and the overall performance and reliability of the equipment are improved.

[0017] By squeezing the transmission through the transmission unit, the automatic reset of the mechanical structure is fully utilized, which can reduce the maintenance requirements. The power generated by the deviation of the shaft of the transmission unit is utilized to accurately detect whether the shaft is offset. At the same time, it can reduce the dependence on complex electronic or hydraulic systems. No electricity is required to maintain its function, thereby reducing the maintenance frequency and cost. Mechanical systems are usually more durable than electronic systems, especially in harsh working environments such as underground. It avoids damage underground and the need for human entry, which can improve the safety of the equipment.

[0018] By triggering the side positioning unit and the upper pushing unit through the pressure piece, the side positioning unit and the upper pushing unit can be locked, thereby ensuring that the mechanical structure can provide higher reliability, and thereby positioning and supporting the rotating shaft at multiple positions, thereby ensuring stable and accurate support for the rotating shaft, and being able to effectively solve the problem of rotating shaft deviation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of a three-dimensional structure of the present invention from a first viewing angle; Figure 2 It is a structural schematic diagram of the connector of the present invention; Figure 3 For the present invention Figure 2 Sectional view at AA in the middle; Figure 4 It is a structural schematic diagram of the transmission unit of the present invention; Figure 5 It is a structural schematic diagram of the push-up unit of the present invention; Figure 6 is a cross-sectional view of a straight rod of the present invention; Figure 7 For the present invention Figure 4 The enlarged schematic diagram of point B in the middle; Figure 8 For the present invention Figure 6 Enlarged schematic diagram of point C in the middle.

[0020] In the figure: 1. Rear frame; 2. Connector; 21. Front frame; 211. Inner shell; 201. Cross bar; 202. Bar; 22. Support arm; 3. Bucket; 4. Transmission unit; 41. Rotating rod; 42. Wheel sleeve; 43. Pressure block; 44. First spring; 45. Torsion spring; 5. Pressing member; 51. Straight rod; 511. Round shaft; 512. Limiting groove; 513. Inner notch; 501. Arc block; 502. Return spring; 52. Pressing plate; 521. Oblique groove; 6. Rotating shaft; 61. Outer wheel; 7. Side positioning unit; 71. Round block rod; 72. Second spring; 73. Side arc plate; 8. Pushing unit; 81. Support arc plate; 82. Third spring; 83. Arc block; 9. Extrusion strip; 91. Raised strip; 92. Round groove. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0022] Reference Figure 1-Figure 8, provides an underground scraper frame, including a rear frame 1, a connector 2 rotatably connected to one end of the rear frame 1, and a bucket 3 arranged at one end of the connector 2, the connector 2 includes a front frame 21 rotatably connected to the rear frame 1, and two support arms 22 arranged outside the front frame 21, two inner shells 211 are symmetrically arranged inside the front frame 21, the inside of the two inner shells 211 are both rotatably connected with a transmission unit 4, the inside of the inner shell 211 is slidably connected with a down-pressing piece 5, the inside of the front frame 21 is rotatably connected with a rotating shaft 6, the rotating shaft 6 passes through the corresponding inner shell 211, the inside of the inner shell 211 is slidably connected with a side positioning unit 7, and the middle part of the bottom end of the front frame 21 is connected with an upward push unit Element 8, the inner sliding connection extrusion bar 9 of the inner shell 211, one end of the front frame 21 is fixedly connected to the rotating shaft 6, and the other end of the front frame 21 is connected to the bucket 3. The transmission unit 4, the lower pressure piece 5, the side positioning unit 7 and the extrusion bar 9 are each provided with two and are symmetrical about the central axis of the inner shell 211, the sliding directions of the lower pressure piece 5 and the side positioning unit 7 are perpendicular, the side positioning unit 7 is located on both sides of the rotating shaft 6, the upper push unit 8 is located below the rotating shaft 6, one end of the extrusion bar 9 is in contact with the bottom end of the upper push unit 8, and the other end of the extrusion bar 9 is located inside the bottom end of the lower pressure piece 5. When the rotating shaft 6 is offset to the set position, the transmission unit 4 uses the lower pressure piece 5 and the extrusion bar 9 to enable the side positioning unit 7 and the upper push unit 8 to reset the rotating shaft 6.

[0023] Reference Figure 1-Figure 3 The transmission unit 4 includes a rotating rod 41 rotatably connected to the inner shell 211, a wheel sleeve 42 rotatably connected to the bottom end of the rotating rod 41, a pressure block 43 fixedly connected to one side of the top end of the rotating rod 41, a first spring 44 rotatably connected between the inner shell 211 and the rotating rod 41 at both ends, and a torsion spring 45 connected between the inner shell 211 and the rotating rod 41. The top of the pressure block 43 is closed and the bottom is open, so that the pressure block 43 will not come into contact with the lower pressure piece 5 when it moves back.

[0024] Specifically, during maintenance, the push rod outside the lower pressure piece 5 can be used to reset the lower pressure piece 5, and a conventional opening and closing door is provided on the outside of the inner shell 211 to facilitate maintenance work, and a conventional slot is provided on the outside of the rotating rod 41, and the rotating rod 41 can be rotated by external drive, and the side positioning unit 7 is the same.

[0025] Reference Figure 1-Figure 7An outer wheel 61 is provided on the outside of the rotating shaft 6, and the wheel sleeve 42 is located inside the outer wheel 61 and the two are in contact with each other. The wheel sleeve 42 is located above the outer wheel 61. When the rotating shaft 6 is actually used, the rotation angle of the rotating shaft 6 and the influence of gravity cause the wear position to be usually at the bottom. After the rotating shaft 6 is worn due to contact with the front frame 21, one end rotates and moves downward. At this time, the outer wheel 61 moves downward, and the wheel sleeves 42 located on both sides of the outer wheel 61, when the outer wheel 61 deviates and moves downward, the pressure on the wheel sleeves 42 is reduced, and the rotating rod 41 is affected by the first spring 44 and the torsion spring 45 and then rotates.

[0026] Reference Figure 2-Figure 5 The pressing member 5 includes a straight rod 51 slidably connected to the inside of the inner shell 211, and a pressing plate 52 fixedly connected to the bottom end of the straight rod 51. A round shaft 511 is provided on one side of the straight rod 51, and the round shaft 511 extends to the bottom of the pressing block 43. When the pressing block 43 rotates downward, the pressing block 43 pushes the round shaft 511. A limited through groove 512 and an inner notch 513 are provided in the middle of the straight rod 51. A magnet is provided at the bottom end of the straight rod 51 to ensure that the straight rod 51 is adsorbed when it contacts the extrusion bar 9, further ensuring that the positions of the straight rod 51, the side positioning unit 7 and the extrusion bar 9 are fixed, thereby ensuring stable restriction on the push-up unit 8.

[0027] Reference Figure 2-Figure 6 The push-up unit 8 includes a supporting arc plate 81 arranged inside the inner shell 211, a third spring 82 connected between the inner shell 211 and the supporting arc plate 81, and an arc block 83 fixedly connected to the bottom end of the supporting arc plate 81. Two third springs 82 are symmetrically arranged about the central axis of the supporting arc plate 81. The two sides of the bottom end of the arc block 83 are arc surfaces. The arc block 83 is fitted with the extrusion bar 9, so that the extrusion bar 9 will squeeze the arc surface at the bottom end of the arc block 83 when it moves, so that the arc block 83 and the supporting arc plate 81 move upward.

[0028] Reference Figure 2-Figure 6 A convex strip 91 is provided on one side of the extrusion strip 9 close to the lower pressing plate 52, an inclined groove 521 is provided at the bottom of the lower pressing plate 52, the convex strip 91 is located inside the inclined groove 521, and a circular groove 92 is provided on the extrusion strip 9; A cross bar 201 is provided inside the inner shell 211 , and a bar 202 is provided at the bottom end inside the inner shell 211 . The cross bar 201 passes through the limiting groove 512 . The cross bar 201 restricts the two straight rods 51 so that the straight rods 51 can only move up and down. The bar 202 is located inside the circular groove 92 .

[0029] In addition, when the straight rod 51 is not squeezed, the bottom of the straight rod 51 is restricted by the squeezing bar 9 and cannot move downward, and the squeezing bar 9 is restricted by the third spring 82 and the arc block 83 and cannot move without external force. At the same time, one side of the straight rod 51 is squeezed by the side positioning unit 7, and thus the straight rod 51 cannot move without external force, thereby ensuring that the position of the straight rod 51 is fixed.

[0030] The top surface of the extruded strip 9 is divided into a horizontal section and an inclined section, and the horizontal section is located below the arc block 83 .

[0031] Specifically, the convex strip 91 provided on the extrusion strip 9 is located inside the inclined groove 521, so that the extrusion strip 9 is limited by the path of the inclined groove 521, and the inclined groove 521 is inclined toward the position of the rotating shaft 6, and because the extrusion strip 9 is limited by the cross bar 201, the extrusion strip 9 can only move in translation, and then when the inclined groove 521 moves downward, the extrusion strip 9 is limited by the cross bar 201, and the extrusion strip 9 moves along the path of the inclined groove 521, and the end of the extrusion strip 9 close to the arc block 83 is a horizontal section, which makes it impossible for the extrusion strip 9 to squeeze the arc block 83, and When the inclined section of the extrusion bar 9 contacts the arc block 83, the arc block 83 is squeezed by the extrusion bar 9. When the inclined section of the extrusion bar 9 completely squeezes the arc block 83, the side positioning unit 7 also loses the obstruction of the straight rod 51, so that the side positioning unit 7 cooperates with the arc block 83 to synchronously reset the rotating shaft 6, realizing an automatic reset structure, while reducing the frequency of manual intervention, reducing maintenance costs and manual labor intensity, and at the same time, when targeting underground equipment, improving the reliability of the equipment and reducing equipment failures caused by problems with the rotating shaft 6.

[0032] Reference Figure 1-Figure 8 The side positioning unit 7 includes a round block rod 71 slidably connected to the inside of the inner groove 513, a second spring 72 connected between the inner shell 211 and the round block rod 71, and a side arc plate 73 connected to the end of the round block rod 71 close to the rotating shaft 6. The curvature of the arc surface of the side arc plate 73 and the supporting arc plate 81 close to the rotating shaft 6 is equal to the curvature of the arc surface of the rotating shaft 6, and the vertical surface of the round block rod 71 is roughened.

[0033] Reference Figure 1-Figure 8 The straight rod 51 is internally slidably connected with an arc block 501, and two return springs 502 are connected between the arc block 501 and the straight rod 51. The arc block 501 and the return spring 502 are located inside the inner groove 513. The vertical surface of the arc block 501 is roughened to ensure that when the arc block 501 contacts the round block rod 71, the round block rod 71 will not deviate.

[0034] Reference Figure 1-Figure 8The inner bottom end of the inner shell 211 is provided with a square groove, which is located directly below the lower pressing plate 52, and the two have the same shape and size. When the lower pressing plate 52 moves downward, the square groove is used to provide the lower pressing plate 52 with space to move downward, and the square groove is used to limit the lower pressing plate 52 to prevent the lower pressing plate 52 from deflecting. The top shape of the inner notch 513 is the same as the outer shape of the round block rod 71, and the length below the inner notch 513 is greater than the diameter of the round block rod 71, that is, when the straight rod 51 is not pressed downward, the outer structure of the round block rod 71 is blocked by the straight rod 51, and when the straight rod 51 moves downward, the round block rod 71 will be in the inner groove. The inner slot 513 is used to limit the round block rod 71 by the internal sliding of the opening 513 to prevent the round block rod 71 from shifting. When the external structure of the round block rod 71 coincides with the inner slot 513, the external structure of the round block rod 71 is no longer blocked. At this time, the round block rod 71 can pass through the inner slot 513. Then, when the second spring 72 rebounds, the side arc plate 73 moves synchronously. When the side arc plate 73 contacts the rotating shaft 6, the round block rod 71 contacts the arc block 501 at the same time, which restricts the round block rod 71 from moving, thereby ensuring that the side arc plate 73 accurately and stably positions the rotating shaft 6.

[0035] The working principle of the present invention is as follows: the outside of the outer wheel 61 supports and squeezes the wheel sleeve 42, so that the first spring 44, the torsion spring 45 and the second spring 72 are in a compressed state in the initial state. When the contact position between the rotating shaft 6 and the front frame 21 is worn and tilted downward, the outer wheel 61 is also synchronously offset, and the degree of squeezing of the wheel sleeve 42 by the outer wheel 61 is weakened. At this time, the first spring 44 pulls the upper side of the rotating rod 41, and the rotating rod 41 is rotatably connected to the inner shell 211, and is affected by the rotation of the torsion spring 45, so that the rotating rod 41 drives the pressing block 43 to rotate, and the pressing block 43 squeezes the circular shaft 511. The straight rod 51 is restricted by the cross bar 201, so that the straight rod 51 and the lower pressure plate 52 move downward synchronously. When the lower pressure plate 52 moves downward, the convex strip 91 on one side of the extrusion strip 9 is located inside the inclined groove 521, and the extrusion strip 9 is restricted by the bar 202 at the same time. When the lower pressure plate 52 moves downward, the convex strip 91 is squeezed, and the convex strip 91 is compressed, so that the extrusion strip 9 moves toward the position of the arc block 83. When the straight rod 51 is squeezed down by the pressure block 43 and contacts the top of the extrusion strip 9, it stops moving. At this time, the extrusion strip 9 is squeezed and moved by the lower pressure plate 52, and the convex part at one end of the extrusion strip 9 has squeezed the arc block 83, so that The supporting arc plate 81 moves up to lift the shaft 6, so that the bottom of the shaft 6 is supported by the supporting arc plate 81. At the same time, when the supporting arc plate 81 moves up, the third springs 82 on both sides are stretched. Due to the downward movement of the straight rod 51, the top of the round block rod 71 loses its barrier synchronously, and the second spring 72 generates a rebound force, so that the round block rod 71 and the side arc plate 73 move toward the position of the shaft 6, thereby causing the two sides of the shaft 6 to be squeezed by the round block rod 71 on one side of the arc block 501. The arc block 501 moves up to compress the return spring 502. When the round block rod 71 passes through the inner notch 513, the return spring 502 rebounds. The arc block 501 moves downward, and the arc block 501 contacts the rough surface of the round block rod 71. At the same time, the arc block 501 blocks the round block rod 71 to prevent the round block rod 71 and the side arc plate 73 from offset. At the same time, the extrusion bar 9 is adsorbed on the bottom end of the straight rod 51, and the lower pressure plate 52 enters the square groove at the bottom of the inner shell 211, so that the straight rod 51 cannot move. Then, the side arc plate 73 and the supporting arc plate 81 are used to position the rotating shaft 6, so that the rotating shaft 6 is reset. At this time, the wheel sleeve 42 is pressurized again and rotates, but the bottom of the pressure block 43 is open, so that the straight rod 51 will not move back, and then the rotating shaft 6 is temporarily reset to ensure smooth underground work.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An underground scraper frame, comprising a rear frame (1), characterized in that: The invention also comprises a connector (2) rotatably connected to one end of the rear frame (1), and a bucket (3) arranged at one end of the connector (2), wherein the connector (2) comprises a front frame (21) rotatably connected to the rear frame (1), and two support arms (22) arranged outside the front frame (21), two inner shells (211) are symmetrically arranged inside the front frame (21), the insides of the two inner shells (211) are both rotatably connected to a transmission unit (4), the insides of the inner shells (211) are slidably connected to a down-pressing member (5), the inside of the front frame (21) is rotatably connected to a rotating shaft (6), the rotating shaft (6) passes through the corresponding inner shell (211), the inside of the inner shell (211) is slidably connected to a side positioning unit (7), the middle part of the bottom end of the front frame (21) is connected to an upward push unit (8), and the inside of the inner shell (211) is slidably connected to a transmission unit (4). The front frame (21) is connected to an extrusion strip (9), one end of the front frame (21) is fixedly connected to the rotating shaft (6), and the other end of the front frame (21) is connected to the bucket (3). The transmission unit (4), the lower pressing member (5), the side positioning unit (7) and the extrusion strip (9) are each provided with two and are symmetrical about the central axis of the inner shell (211). The sliding directions of the lower pressing member (5) and the side positioning unit (7) are perpendicular. The side positioning unit (7) is located on both sides of the rotating shaft (6). The upper push unit (8) is located below the rotating shaft (6). One end of the extrusion strip (9) is in contact with the bottom end of the upper push unit (8), and the other end of the extrusion strip (9) is located inside the bottom end of the lower pressing member (5). When the rotating shaft (6) deviates to a set position, the transmission unit (4) resets the rotating shaft (6) through the lower pressing member (5) and the extrusion strip (9).

2. The underground scraper frame according to claim 1, characterized in that: The transmission unit (4) comprises a rotating rod (41) rotatably connected to the inner shell (211), a wheel sleeve (42) rotatably connected to the bottom end of the rotating rod (41), a pressure block (43) fixedly connected to one side of the top end of the rotating rod (41), a first spring (44) rotatably connected between the inner shell (211) and the rotating rod (41) at both ends, and a torsion spring (45) connected between the inner shell (211) and the rotating rod (41); the pressure block (43) is closed at the top and open at the bottom.

3. The underground scraper frame according to claim 2, characterized in that: An outer wheel (61) is arranged outside the rotating shaft (6), the wheel sleeve (42) is located inside the outer wheel (61) and the two are in close contact with each other, and the wheel sleeve (42) is located above the outer wheel (61).

4. The underground scraper frame according to claim 2, characterized in that: The pressing member (5) comprises a straight rod (51) slidably connected to the interior of the inner shell (211), and a pressing plate (52) fixedly connected to the bottom end of the straight rod (51); a round shaft (511) is provided on one side of the straight rod (51), and the round shaft (511) extends to the bottom of the pressing block (43); a limiting through groove (512) and an inner notch (513) are provided in the middle of the straight rod (51); and a magnet is provided at the bottom end of the straight rod (51).

5. The underground scraper frame according to claim 4, characterized in that: The push-up unit (8) includes a supporting arc plate (81) arranged inside the inner shell (211), a third spring (82) connected between the inner shell (211) and the supporting arc plate (81), and an arc block (83) fixedly connected to the bottom end of the supporting arc plate (81), wherein two third springs (82) are symmetrically arranged about the central axis of the supporting arc plate (81), and both sides of the bottom end of the arc block (83) are arc surfaces, and the arc block (83) is in contact with the extrusion strip (9).

6. The underground scraper frame according to claim 5, characterized in that: A convex strip (91) is provided on one side of the extrusion strip (9) close to the lower pressing plate (52), an inclined groove (521) is provided at the bottom of the lower pressing plate (52), the convex strip (91) is located inside the inclined groove (521), and a circular groove (92) is provided on the extrusion strip (9).

7. The underground scraper frame according to claim 5, characterized in that: The side positioning unit (7) comprises a round block rod (71) slidably connected to the inside of the inner notch (513), a second spring (72) connected between the inner shell (211) and the round block rod (71), and a side arc plate (73) connected to one end of the round block rod (71) close to the rotating shaft (6), the curvature of the arc surface of the side arc plate (73) and the supporting arc plate (81) close to the rotating shaft (6) is equal to the curvature of the arc surface of the rotating shaft (6), and the vertical surface of the round block rod (71) is roughened.

8. The underground scraper frame according to claim 7, characterized in that: An arc block (501) is slidably connected inside the straight rod (51), two return springs (502) are connected between the arc block (501) and the straight rod (51), the arc block (501) and the return spring (502) are located inside the inner notch (513), and the vertical surface of the arc block (501) is roughened.

9. The underground scraper frame according to claim 5, characterized in that: A cross bar (201) is provided inside the inner shell (211), a bar (202) is provided at the bottom end inside the inner shell (211), the cross bar (201) passes through the position-limiting groove (512), and the bar (202) is located inside the circular groove (92).

10. The underground scraper frame according to claim 7, characterized in that: A square groove is provided at the inner bottom end of the inner shell (211), and the square groove is located directly below the lower pressure plate (52). The top shape of the inner groove (513) is the same as the outer shape of the round rod (71), and the length below the inner groove (513) is greater than the diameter of the round rod (71).

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