Three-roller file

Abstract

The utility model provides a three-roller file. Comprising a file, a connecting sleeve, a connecting rod, a large concave wheel and a small concave wheel on the connecting sleeve, the file is used for manual filing operation; the connecting sleeve is provided with a connecting base, a connecting base inner cavity is formed in the connecting base, and the connecting base inner cavity is connected with the head end of the file and used for containing the head end of the file and installing and fixing the file to form the combined tool. The small concave wheel is arranged at the bottom of the connecting base and used for supporting rolling of the file. The connecting rod is a bilaterally symmetrical connecting rod mechanism and is arranged at the front end of the connecting sleeve; the large concave wheels are arranged at the two end points of the connecting rod and used for supporting rolling of the file, the distance between the two large concave wheels is adjusted through the connecting rod, and the small concave wheel is located on the perpendicular bisector between the two large concave wheels. Wherein the large concave wheel and the small concave wheel which are bilaterally symmetrical form an inverted triangle structure, a rolling supporting combination is formed at the head end of the file, the grip is assembled on the central screw rod of the connecting rod, the grip and a file handle at the tail end of the file form two force application points, and the stability of the file in the linear advancing process is enhanced.

Description

Technical Field

[0001] This utility model relates to files in the field of machinery, and more particularly to a three-roller file. Background Technology

[0002] Shipbuilding is a complex field involving the processing and assembly of pipes made of various materials. High quality requirements are placed on the pipe end faces during construction, especially since shipbuilding typically employs segmented pre-assembly and modular fabrication methods. Pipes frequently require cutting during construction, particularly using tools like horizontal band saws, toothed saws, and handheld electric grinders, resulting in burrs on the cut ends. These burrs often require manual grinding. Metal burrs are generally hard, and manual grinding requires applying pressure to remove them. Controlling the grinding force, time, and angle is difficult and virtually unrestricted, leading to a high degree of freedom in manual grinding. However, standardizing the manual grinding process is challenging, making it difficult for process engineers to streamline and parameterize the process. The angle of the worker's hand is also unpredictable, resulting in varying grinding effects. Basic process guidelines are often not very practical, and operator training relies heavily on extensive experience, leading to long training periods and a significant impact on overall grinding quality. Especially when grinding the outer wall of large-diameter pipes, the large radius (R) of the outer wall of the large-diameter pipe makes it very easy for the concave wheel groove to deviate or slip along the straight line of the outer wall of the pipe. Simply increasing the size of the concave wheel is not enough to improve the condition.

[0003] However, in the process of implementing the inventive technical solution in the embodiments of this application, the inventors of this application discovered that the above-mentioned technology has at least the following technical problems:

[0004] 1. When using a file for manual polishing, uneven polishing depth is often observed, and the pipe wall is easily damaged due to an unstable grip on the polishing tool. Polishing damage to carbon steel pipes is generally not noticeable and has a relatively small impact on overall quality. However, the walls of bright stainless steel pipes, copper-plated iron pipes, copper pipes, and nuclear-grade pipes are very easily damaged. Once scratches, abrasions, or excessive polishing occur, the damage is generally irreversible and directly affects the pipe quality.

[0005] 2. Large-diameter pipes have a large radius (R) on the outer wall surface. The concave groove type roller file has poor guidance along the straight direction of the outer wall of the pipe, making it very easy to deviate or slip off. The file is inefficient to use and is prone to sudden slippage.

[0006] 3. When using a steel file, the file has poor working freedom. The lack of slight up-down and left-right movement of the file makes the entire sanding process not only laborious but also inefficient. Summary of the Invention

[0007] To address the shortcomings of existing technologies and the poor linear motion guidance of files used for deburring the outer wall end face of large-diameter pipes, this application provides a three-roller file. This file utilizes...

[0008] Two large concave wheels at the far end and a small concave wheel at the near end form an inverted triangular front support and guide device. The entire device rides on the outer wall of the tube, creating three rolling support points for the file, enhancing the stability of the file's linear movement. At the same time, it adds vertical and horizontal movable joints to the file, ensuring both the stability of its linear motion and sufficient freedom to prevent the file from jamming due to excessively hard or large burrs at a certain point. This makes the entire filing work more labor-saving and solves the technical problem of guiding the linear motion of the file.

[0009] The solution adopted by the embodiments of this application to solve the technical problem is:

[0010] A three-roller file includes a file, a connecting sleeve, a connecting rod, a large concave wheel, and a small concave wheel on the connecting sleeve;

[0011] The file is used for manual filing operations; the connecting sleeve has a connecting seat with an inner cavity that connects to the head end of the file to accommodate and fix the file, forming a combination tool; a small concave wheel is located at the bottom of the connecting seat to support the rolling of the file; the connecting rod is a symmetrical linkage mechanism located at the front end of the connecting sleeve; a large concave wheel is located at both ends of the connecting rod to support the rolling of the file, and the distance between the two large concave wheels is adjusted by the connecting rod, with the small concave wheel located on the vertical line between the two large concave wheels;

[0012] The two symmetrical large and small concave wheels form an inverted triangle structure, creating a rolling support combination at the tip of the file, which enhances the stability of the file during its straight-line movement.

[0013] Positive effects: The technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0014] 1. Because the embodiments of this application adopt the technical means of setting a small concave wheel on the connecting sleeve and connecting two large concave wheels on the connecting rod, the front end of the file has three stable rolling support points in the shape of an inverted triangle. This effectively solves the technical problem in the prior art that the file has poor guidance during the linear movement along the outer wall of the pipe, and is prone to deviation and slippage. When the file is filing, it can maintain stable linear movement, thereby achieving the technical effect of improving the filing quality.

[0015] 2. As the embodiments of this application adopt the method of movably connecting the file through the connecting seat and the screw sleeve, the screw sleeve and the connecting seat can move up and down, and the screw sleeve and the central screw of the connecting rod can move left and right. After the file and the connecting seat are fixed, the whole can rotate up and down and left and right through the screw sleeve to adjust the connection angle between the file and the connecting rod, thereby achieving the technical effect of the whole device forming a rigid structure that can rotate up and down and left and right.

[0016] 3. Because the embodiment of this application adds two springs, one upper and one lower, between the small concave wheel and the connecting seat, the entire file has increased elastic rebound force when pressed down and lifted up. At the same time, because the file fixing screw sleeve has the freedom of up and down movement, the file can better control the working height and angle throughout the process through the rebound of the spring force.

[0017] 4. Because this application example uses a connecting sleeve with one end connected to the head end of the file and the other end connected to a connecting rod, and the connecting rod has a central screw, and a handle is mounted on the central screw, forming two force application points with the file handle at the tail end of the file, it effectively solves the technical problem of holding the file stably in the prior art. It applies horizontal thrust and vertical pressure to the file, and the two gripping points can control the force, thereby achieving the technical effect of enhancing filing stability and improving the filing quality of the file.

[0018] 5. Since the two large concave wheels at the far end of this application example can be adjusted in relative distance through a linkage mechanism, the entire device has the characteristic of better fitting the outer wall of the pipe. The large concave wheels can be adjusted to fit the outer wall more closely, thereby further improving the stability of the device's movement. At the same time, the adjustable wheel distance between the two large concave wheels allows the device to match a wider range of pipe outer diameters, avoiding the need to manufacture a large number of devices to meet the construction needs of pipes with different diameters.

[0019] It is suitable for use as a three-roller file. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is the southeast isometric view of this embodiment;

[0022] Figure 2 This is the northwest isometric view of this embodiment;

[0023] Figure 3 This is the southwest isometric view of the connecting rod;

[0024] Figure 4 This is the northwest isometric sectional view of this embodiment;

[0025] Figure 5 This is the southeast isometric sectional view of this embodiment;

[0026] Figure 6 This is the front view of this embodiment;

[0027] Figure 7 This is a front sectional view of this embodiment;

[0028] Figure 8 This is a top view of this embodiment;

[0029] Figure 9 This is the southeast isometric view of the threaded sleeve;

[0030] Figure 10 This is the southeast isometric side view of the connector.

[0031] Figure 11 This is the southeast isometric view of the small concave wheel;

[0032] Figure 12 This is the southeast isometric view of the upper crossarm;

[0033] Figure 13 This is the southeast isometric view of the left long arm;

[0034] Figure 14 This is the southeast isometric view of the left short arm;

[0035] Figure 15 This is the southeast isometric view of the lower crossarm;

[0036] Figure 16 Isometric view of the southeastern part of the right long arm;

[0037] Figure 17 Isometric view of the southeastern part of the right short arm;

[0038] Figure 18 Isometric view of the southeast side of the central screw;

[0039] Figure 19 This is the southeast isometric view of the large concave wheel.

[0040] In the picture:

[0041] 1. File;

[0042] 2. Continuous set,

[0043] 20. Screw insert,

[0044] 201. Screw sleeve shaft hole,

[0045] 202. Threaded sleeve connection to inner hole,

[0046] 203. Arc surface of threaded sleeve,

[0047] 21. Sleeve shaft,

[0048] 22. Connector,

[0049] 221. Front of the connector,

[0050] 2211. Small hole on the front of the connector.

[0051] 2212. Large hole on the front of the connector.

[0052] 222. Connecting seat boss,

[0053] 2221. Connecting seat boss hole,

[0054] 223. Connector inner cavity,

[0055] 23. Small concave wheel,

[0056] 231. Small concave wheel, small top surface.

[0057] 232. The upper end of the small cylindrical surface of the small concave wheel,

[0058] 233. The lower end of the small concave wheel's cylindrical surface,

[0059] 234. Small concave wheel, small wheel groove,

[0060] 235. Midpoint of the small concave wheel's cylindrical surface.

[0061] 236. Top surface of the small concave wheel frame,

[0062] 24. Spring,

[0063] 25. Screws;

[0064] 3. Connecting rod,

[0065] 30. Upper crossarm,

[0066] 301. Upper crossarm center platform,

[0067] 3011. Upper crossarm stud hole,

[0068] 302. Front view of the upper crossarm.

[0069] 3021. Upper transverse arm frontal face A,

[0070] 3022. Upper transverse arm frontal view B,

[0071] 303. Back of upper crossarm,

[0072] 3031. Hole B on the back of the upper crossarm.

[0073] 3032. Hole A on the back of the upper crossarm.

[0074] 31. Left long arm,

[0075] 311. Front view of the left long arm.

[0076] 3111. Left long arm facing forward, face C.

[0077] 3112. Left long arm frontal face AB,

[0078] 312. Side view of the left long arm.

[0079] 3121. Left long arm side hole L,

[0080] 313. Inner side of the left long arm,

[0081] 3131. Hole C on the inner side of the left long arm.

[0082] 32. Left short arm,

[0083] 321. Front view of the left short arm.

[0084] 3211. Left short arm, frontal view of face C,

[0085] 322. Left short arm crossbar,

[0086] 323. Left short arm back,

[0087] 3231. Hole C on the back of the left short arm.

[0088] 324. Left short arm, short table.

[0089] 3241. Left short arm short platform hole BA,

[0090] 33. Lower crossarm,

[0091] 331. Lower crossarm center platform,

[0092] 3311. Lower crossarm stud hole,

[0093] 332. Lower crossarm front view,

[0094] 3321. Lower transverse arm frontal face A,

[0095] 3322. Lower transverse arm, frontal face B,

[0096] 333. Back side,

[0097] 3331. Hole B on the back of the lower crossarm,

[0098] 3332. Hole A on the back of the lower crossarm,

[0099] 34. Right short arm,

[0100] 341. Front view of the right short arm.

[0101] 3411. Right short arm frontal view C,

[0102] 342. Right short arm transverse plate,

[0103] 343. Right short arm (back view)

[0104] 3431. Hole C on the back of the right short arm.

[0105] 344. Right short arm, short table.

[0106] 3441. Right short arm short platform hole BA,

[0107] 35. Right long arm,

[0108] 351. Front view of the right long arm.

[0109] 3511. Right long arm frontal view C,

[0110] 3512. Right long arm facing forward, face AB.

[0111] 352. Right long arm side view,

[0112] 3521. Right long arm side hole L,

[0113] 353. The inner side of the right long arm,

[0114] 3531. Hole C on the inner side of the right long arm.

[0115] 36. Arm shaft,

[0116] 37. Center screw,

[0117] 371. Hexagonal hole for the center screw.

[0118] 372. Central screw cylindrical surface,

[0119] 373. Bottom of the central screw,

[0120] 38. Thin Nut,

[0121] 39. Spring washer;

[0122] 4. Large concave wheel,

[0123] 41. The top of the large concave wheel connects to the column.

[0124] 42. Large concave wheel connecting post,

[0125] 43. Large concave wheel groove. Detailed Implementation

[0126] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0127] This application provides a double-roller file that solves the problem of poor linear motion guidance in existing files. The file utilizes a front-end support and guide device with two large concave rollers 4 at the far end and a small concave roller 23 at the near end, forming an inverted triangle structure. This creates three rolling support points on the outer wall of the tube, enhancing the stability of the file's linear movement. Simultaneously, it adds vertical and horizontal movable joints to the file, ensuring both the stability of its linear motion and sufficient freedom to prevent jamming due to excessively hard or large burrs at a certain point. This makes the filing process more labor-saving and achieves stable linear motion guidance for the file 1.

[0128] As shown in the figure, a three-roller file includes a file 1, a connecting sleeve 2, a connecting rod 3, a large concave wheel 4, and a small concave wheel 23 on the connecting sleeve 2;

[0129] File 1 is used for manual filing operations;

[0130] The connecting sleeve 2 has a connecting seat 22, and the connecting seat 22 has a connecting seat cavity 223. The connecting seat cavity 223 is connected to the head end of the file 1 and is used to receive the head end of the file 1 and install and fix the file 1 to form a combination tool.

[0131] The small concave wheel 23 is located at the bottom of the connecting seat 22 and is used to support the rolling of the file 1;

[0132] Link 3 is a left-right symmetrical linkage mechanism, located at the front end of link 2;

[0133] The large concave wheel 4 is set at both ends of the connecting rod 3 to support the rolling of the file 1. The distance between the two large concave wheels 4 is adjusted by the connecting rod 3, and the small concave wheel 23 is located on the vertical line between the two large concave wheels 4.

[0134] Among them, the two large concave wheels 4 and the small concave wheel 23, which are symmetrical from left to right, form an inverted triangle structure, forming a rolling support combination at the head end of the file 1 to guide the linear motion, thereby enhancing the stability of the file's linear movement, thus avoiding damage to the workpiece to be filed and improving the quality of the filing work.

[0135] The technical solutions described in the embodiments of this application above have at least the following technical effects or advantages:

[0136] Because a small concave wheel 23 is set on the connecting sleeve 2 and two large concave wheels 4 are connected on the connecting rod 3, the front end of the file has three stable rolling support points in the shape of an inverted triangle. Therefore, the technical problem of poor guidance and easy deviation and slippage of the file during the linear movement along the outer wall of the pipe in the prior art is effectively solved. When the file is filing, it can maintain stable linear movement, thereby achieving the technical effect of improving the filing quality.

[0137] To ensure the stability of the structure in this embodiment, the connecting sleeve 2 includes a threaded sleeve 20, a sleeve shaft 21, a connecting seat 22, a small concave wheel 23, a spring 24, and a screw 25;

[0138] The connecting seat 22 is a block structure. One end of the connecting seat 22 is connected to the threaded sleeve 20 through the sleeve shaft 21. The threaded sleeve 20 includes a threaded sleeve shaft hole 201, a threaded sleeve connecting inner hole 202, and a threaded sleeve arc surface 203.

[0139] The connector 22 includes a front surface 221, a boss 222, and an inner cavity 223; wherein, the front surface 221 has a small hole 2211 and a large hole 2212, and the boss 222 has a boss hole 2221.

[0140] File 1 is inserted into the inner cavity 223 of the connector 22. Screw 25 is screwed in through the large hole 2212 on the front side of the connector 221 to press and fix the file. The large hole 2212 on the front side of the connector is a threaded hole.

[0141] The inner hole 202 of the threaded sleeve 20 is connected to the boss hole 2221 on the boss 222 of the connecting seat via the sleeve shaft 21. The arc surface 203 of the front end of the threaded sleeve 20 is rounded to avoid interference between the front end of the threaded sleeve 20 and the connecting rod 3. The pivot hole 201 of the threaded sleeve is threaded to the central screw 37 of the connecting rod 3. The pivot hole 201 of the threaded sleeve is a threaded hole, and the central screw 37 is an internal hexagonal threaded rod. The central screw 37 can be fitted with a handle, forming two force application points with the file handle at the end of the file. Horizontal thrust and vertical pressure are applied to the file. The two gripping points can control the force and hold the file stably, thereby achieving the technical effect of enhancing filing stability and improving the filing quality of the file.

[0142] The concave wheel 23 includes a small concave wheel top surface 231, a small concave wheel upper end surface 232, a small concave wheel lower end surface 233, a small concave wheel groove 234, a small concave wheel middle end surface 235, and a small concave wheel frame top surface 236;

[0143] The upper end 232, middle end 235, and lower end 233 of the small concave wheel 23 are inserted into the small hole 2211 on the front of the connecting seat 22. Springs 24 need to be inserted into both the upper end 232 and lower end 233 of the small concave wheel 23. The final position of the middle end 235 of the small concave wheel 23 is located within the inner cavity 223 of the connecting seat 22. Two springs 24 are located on either side of the upper and lower end faces of the connecting seat 22. The spring 24 on the upper end face passes through the upper end 232 of the small concave wheel 23 and is connected to the small top surface 231 of the small concave wheel. The front 221 of the connecting seat is locked in place, and the spring 24 on the lower end passes through the lower end 233 of the small concave wheel's cylindrical surface and is locked to the back of the connecting seat 22 by the top surface 236 of the small concave wheel's frame. After the springs 24 are installed in sequence, the bottom surface of the lower end of the small concave wheel 23 is connected and fixed to the top surface 236 of the small concave wheel's frame. When the small concave wheel groove 234 of the small concave wheel 23 is locked on the outer wall of the tube, the elastic rebound force of the two springs 24 when the file 1 is pressed is transmitted to the file 1 through the small concave wheel 23, the springs 24, and the connecting seat 22, so as to realize the up and down elastic movement of the small concave wheel during the pressing process.

[0144] The technical solutions described in the embodiments of this application above have at least the following technical effects or advantages:

[0145] Since file 1 is movably connected to connecting seat 22 and threaded sleeve 20 through connecting sleeve 2, threaded sleeve 20 and connecting seat 22 can move up and down, and threaded sleeve 20 and central screw 37 of connecting rod 2 can move left and right, after file 1 and connecting seat 22 are fixed, the whole can rotate up and down and left and right through threaded sleeve 20 to adjust the connection angle between file 1 and connecting rod 3, thereby achieving the technical effect of the whole device forming a rigid structure that can rotate up and down and left and right.

[0146] Because two springs 24, one upper and one lower, are added between the small concave wheel 23 and the connecting seat 22, the entire file 1 has increased elastic rebound force when pressed down and lifted up. At the same time, because the file fixing screw sleeve 20 has the freedom to move up and down, the file can better control the working height and angle throughout the process through the rebound of the spring force.

[0147] Since one end of the connecting sleeve 20 is connected to the head end of the file and the other end is connected to the connecting rod 3, and the connecting rod 3 has a central screw 37, the handle is mounted on the central screw 37, forming two force application points with the file handle at the tail end of the file. This effectively solves the technical problem of holding the file stably in the prior art. By applying horizontal thrust and vertical pressure to the file, the two gripping points can control the force, thereby achieving the technical effect of enhancing filing stability and improving the filing quality of the file.

[0148] To further ensure the stability of the structure in this example, the connecting rod 3 includes an upper horizontal arm 30, a left long arm 31, a left short arm 32, a lower horizontal arm 33, a right short arm 34, a right long arm 35, an arm shaft 36, a central screw 37, a thin nut 38, and a spring washer 39. The entire connecting rod 3 forms a closed, left-right symmetrical connecting rod mechanism. By changing the position of the central screw 37, the distance between the upper horizontal arm 30 and the lower horizontal arm 33 is adjusted, thereby changing the distance between the left long arm 31 and the right long arm 35 of the connecting rod 3, thus adjusting the relative distance between the two large concave wheels 4 connected to the connecting rod 3.

[0149] To optimize the structure of this embodiment, the upper cross arm 30 includes an upper cross arm center platform 301, an upper cross arm front face 302, and an upper cross arm back face 303; wherein, the upper cross arm center platform 301 has an upper cross arm stud hole 3011; the upper cross arm front face 302 has an upper cross arm front hole A3021 and an upper cross arm front hole B3022; the upper cross arm back face 303 has an upper cross arm back face hole B3031 and an upper cross arm back face hole A3032;

[0150] The left long arm 31 includes a front surface 311, a side surface 312, and an inner surface 313; wherein, the front surface 311 of the left long arm has a front face hole C3111 and a front face hole AB3112; the side surface 312 of the left long arm has a side face hole L3121; and the inner surface 313 of the left long arm has an inner surface hole C3131.

[0151] The left short arm 32 includes a left short arm front face 321, a left short arm cross plate 322, a left short arm back face 323, and a left short arm short platform 324; wherein, the left short arm front face 321 has a left short arm front hole C3211; the left short arm back face 323 has a left short arm back hole C3231; and the left short arm short platform 324 has a left short arm short platform hole BA3241;

[0152] The lower cross arm 33 includes a lower cross arm center platform 331, a lower cross arm front face 332, and a lower cross arm back face 333; wherein, the lower cross arm center platform 331 has a lower cross arm stud hole 3311; the lower cross arm front face 332 has a lower cross arm front hole A3321 and a lower cross arm front hole B3322; the lower cross arm back face hole B3331 and a lower cross arm back face hole A3332 are provided on the lower cross arm.

[0153] The right short arm 34 includes a right short arm front face 341, a right short arm cross plate 342, a right short arm back face 343, and a right short arm short platform 344; wherein, the right short arm front face 341 has a right short arm front hole C3411; the right short arm back face 343 has a right short arm back hole C3431; and the right short arm short platform 344 has a right short arm short platform hole BA3441.

[0154] The right long arm 35 includes a front side 351, a side side 352, and an inner side 353; wherein, the front side 351 of the right long arm has a front hole C3511 and a front hole AB3512; the side side 352 of the right long arm has a side hole L3521; and the inner side 353 of the right long arm has an inner side hole C3531.

[0155] The central screw 37 includes a central screw hexagonal hole 371, a central screw cylindrical surface 372, and a central screw bottom 373;

[0156] The upper horizontal arm 30, left long arm 31, left short arm 32, lower horizontal arm 33, right short arm 34, and right long arm 35 are connected sequentially, with the upper horizontal arm 30 positioned at the top. The upper horizontal arm's front hole A3021 and back hole A3032 on the front 302 of the upper horizontal arm are connected to the left long arm's front hole AB3112 on the front 311 of the left long arm 31 via an arm shaft 36. The inner side 313 of the left long arm is hollowed out to reduce weight and enhance rigidity, and the left long arm's front hole C311... 1. The inner side hole C3131 of the left long arm is connected to the front hole C3211 of the left short arm 32 (front side 321) and the back hole C3231 of the left short arm 323 via arm shaft 36; the left short arm short platform hole BA3241 of the left short arm short platform 324 is connected to the front hole A3321 of the lower crossarm 33 (front side 332) and the back hole B3332 of the lower crossarm via arm shaft 36; the front hole B3322 and the back hole 333 of the lower crossarm are connected via arm shaft 36; The lower crossarm back hole B3331 is connected to the right short arm short platform hole BA3441 of the right short arm short platform 344 of the right short arm 34 via an arm shaft; the right short arm front hole C3411 of the right short arm front 341 and the right short arm back hole C3431 of the right short arm back 343 are connected to the right long arm front hole C3511 of the right long arm front 351 and the right long arm inner side hole C3531 of the right long arm inner side 353 via an arm shaft 36; the right long arm front hole AB 3512 is connected to the front hole B3022 and the back hole B3031 of the upper crossarm via the arm shaft 36; the bottom 373 of the center screw of the center screw 37 is on the same plane as the center platform 331 of the lower crossarm; the hexagonal hole 371 of the center screw is an internal hexagonal hole for rotating the center screw 37; the stud surface 372 of the center screw is threaded to the upper crossarm stud hole 3011 on the center platform 301 of the upper crossarm and the lower crossarm stud hole 3311 on the center platform 331 of the lower crossarm.

[0157] Among them, the lengths of the left short arm horizontal plate 322 and the right short arm horizontal plate 342 need to be appropriate to avoid interference with the linkage movement;

[0158] Thin nuts 38 and spring washers 39 are located on the upper and lower sides of the upper cross arm 30. Thin nuts 38 and spring washers 39 are used to prevent loosening of the connection between the upper cross arm 30, the left long arm 31, the left short arm 32, the lower cross arm 33, the right short arm 34, the right long arm 35, the arm shaft 36, and the central screw 37, and to prevent the central screw 37 from moving during the left and right swinging of the file.

[0159] To further optimize the structure of this embodiment, the large concave wheel 4 includes a large concave wheel connecting post top 41, a large concave wheel connecting post 42, and a large concave wheel groove 43;

[0160] The two large concave wheels 4 are connected by large concave wheel pins 42, which are inserted into the left long arm side hole L3121 of the left long arm side 312 and the right long arm side hole L3521 of the right long arm side 352, respectively. The top 41 of the large concave wheel pins coincides with the right long arm side 352 and the left long arm side 312, respectively. The wheel groove 43 of the large concave wheel contacts the outer wall of the tube.

[0161] The technical solutions described in the embodiments of this application above have at least the following technical effects or advantages:

[0162] Since the relative distance between the two large concave wheels 4 can be adjusted through the linkage 3 mechanism, the entire device has the characteristic of better fitting the outer wall of the pipe. Therefore, the stability of the device can be further improved by adjusting the large concave wheels 4 to fit the outer wall more closely. At the same time, the adjustable wheel distance between the two large concave wheels 4 allows the device to match a wider range of pipe outer diameters, avoiding the need to manufacture a large number of devices to meet the construction needs of pipes with different diameters.

[0163] Specifically, the rim of the large concave wheel 4 is concave, and the two large concave wheels ride on the outer wall of the tube to guide the entire device.

[0164] As a standard technical choice, the small concave wheel 23 and the large concave wheel 4 are made of nylon, which has a suitable hardness and softness. Nylon has a certain degree of hardness to prevent work debris from getting into the wheel and scratching the workpiece. At the same time, nylon is a non-metallic material, which prevents the workpiece from being scratched during long-term rolling operation.

[0165] The working process of this embodiment:

[0166] Secure the tube firmly and adjust the connecting rod 3 so that the two large concave wheels 4 are completely mounted on the outer wall of the tube. The adjustment process of the connecting rod 3 is mainly achieved by changing the relative position of the central screw 37 with the upper horizontal arm 30 and the lower horizontal arm 33, so as to ensure that the entire device can move in a straight line along the axis of the tube.

[0167] When filing, hold the file handle at the end of the file 1 with one hand and the central screw 37 on the device with the other hand. Alternatively, a handle can be added to the central screw 37 for a better grip. Use both hands to move back and forth to remove burrs from the location. Adjust the downward pressure and left and right swinging amplitude of the file according to the height of the burrs.

[0168] It is worth noting that all the contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of file 1, small concave wheel 23, large concave wheel 4, small spring 24, sleeve shaft 21, and arm shaft 36 are not specifically limited and can be determined using conventional equipment. Electrical control components not mentioned in this technical solution are not shown in the figure because they are existing technologies, and will not be described here.

[0169] Finally, it should be noted that:

[0170] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A three-roller file, characterized in that: Includes file (1), connecting sleeve (2), connecting rod (3), large concave wheel (4) and small concave wheel (23) on connecting sleeve (2); A file (1) is used for manual filing operations; The connecting sleeve (2) has a connecting seat (22), and the connecting seat (22) has a connecting seat cavity (223). The connecting seat cavity (223) is connected to the head end of the file (1) for receiving the head end of the file (1) and installing and fixing the file (1) to form a combination tool. The small concave wheel (23) is located at the bottom of the connecting seat (22) to support the rolling of the file (1); The connecting rod (3) is a left-right symmetrical connecting rod mechanism, which is set at the front end of the connecting sleeve (2); The large concave wheel (4) is set at both ends of the connecting rod (3) to support the rolling of the file (1). The distance between the two large concave wheels (4) is adjusted by the connecting rod (3), and the small concave wheel (23) is located on the vertical line between the two large concave wheels (4). Among them, the two large concave wheels (4) and the small concave wheel (23) that are symmetrical on the left and right form an inverted triangle structure, forming a rolling support combination at the head of the file (1) to enhance the stability of the file during its straight-line movement.

2. A three-roller file according to claim 1, characterized in that: The connecting sleeve (2) includes a threaded sleeve (20), a sleeve shaft (21), a connecting seat (22), a small concave wheel (23), a spring (24), and a screw (25); The connecting seat (22) is a block structure. One end of the connecting seat (22) is connected to the threaded sleeve (20) through the sleeve shaft (21). The threaded sleeve (20) includes a threaded sleeve shaft hole (201), a threaded sleeve connecting inner hole (202), and a threaded sleeve arc surface (203). The connecting seat (22) includes a front side (221), a boss (222), and an inner cavity (223); wherein, the front side (221) has a small hole (2211) and a large hole (2212), and the boss (222) has a boss hole (2221). The file (1) is inserted into the inner cavity (223) of the connector (22), and the screw (25) is screwed in through the large hole (2212) on the front of the connector (221) to press and fix the file. The large hole (2212) on the front of the connector is a threaded hole. The inner hole (202) of the threaded sleeve (20) is connected to the hole (2221) of the connecting seat boss (222) through the sleeve shaft (21), and the arc surface (203) of the front end of the threaded sleeve (20) is rounded. The concave wheel (23) includes a small concave wheel top surface (231), a small concave wheel upper end surface (232), a small concave wheel lower end surface (233), a small concave wheel groove (234), a small concave wheel middle end surface (235), and a small concave wheel frame top surface (236). The upper end (232), middle end (235), and lower end (233) of the concave wheel (23) are inserted into the small hole (2211) on the front of the connecting seat of the connecting seat (22). Springs (24) need to be inserted into both the upper end (232) and lower end (233) of the concave wheel. The final position of the middle end (235) of the concave wheel is located in the inner cavity (223) of the connecting seat of the connecting seat (22). The two springs (24) are located on both sides of the upper and lower end faces of the connecting seat (22). The spring (24) on the upper end face passes through the upper end (232) of the concave wheel and is inserted through the small top surface (231) of the concave wheel. The spring (24) on the lower end of the concave wheel passes through the lower end (233) of the small concave wheel column and is locked by the top surface (236) of the small concave wheel frame and the back of the connecting seat (22). After installing the springs (24) in sequence, the bottom surface of the lower end of the small concave wheel (23) is connected and fixed to the top surface (236) of the small concave wheel frame. When the small concave wheel groove (234) of the small concave wheel (23) is locked on the outer wall of the tube, the elastic rebound force of the two springs (24) when pressing the file (1) is transmitted to the file (1) through the small concave wheel (23), spring (24) and connecting seat (22), realizing the up and down elastic movement of the small concave wheel during the pressing process.

3. A three-roller file according to claim 2, characterized in that: The connecting rod (3) includes an upper cross arm (30), a left long arm (31), a left short arm (32), a lower cross arm (33), a right short arm (34), a right long arm (35), an arm shaft (36), a center screw (37), a thin nut (38), and a spring washer (39). The entire connecting rod (3) forms a closed left-right symmetrical connecting rod mechanism. By changing the position of the central screw (37), the distance between the upper horizontal arm (30) and the lower horizontal arm (33) is adjusted, thereby causing the distance between the left long arm (31) and the right long arm (35) of the connecting rod (3) to change, thus realizing the adjustment of the relative distance between the two large concave wheels (4) connected to the connecting rod (3).

4. A three-roller file according to claim 3, characterized in that: The upper cross arm (30) includes an upper cross arm center platform (301), an upper cross arm front face (302), and an upper cross arm back face (303); wherein, the upper cross arm center platform (301) has an upper cross arm stud hole (3011); the upper cross arm front face (302) has an upper cross arm front hole A (3021) and an upper cross arm front hole B (3022); the upper cross arm back face (303) has an upper cross arm back face hole B (3031) and an upper cross arm back face hole A (3032). The left long arm (31) includes a front side (311), a side side (312), and an inner side (313); wherein, the front side (311) of the left long arm has a front hole C (3111) and a front hole AB (3112); the side side (312) of the left long arm has a side hole L (3121); and the inner side (313) of the left long arm has an inner side hole C (3131). The left short arm (32) includes a left short arm front face (321), a left short arm cross plate (322), a left short arm back face (323), and a left short arm short platform (324); wherein, the left short arm front face (321) has a left short arm front face hole C (3211); the left short arm back face (323) has a left short arm back face hole C (3231); and the left short arm short platform (324) has a left short arm short platform hole BA (3241). The lower cross arm (33) includes a lower cross arm center platform (331), a lower cross arm front face (332), and a lower cross arm back face (333); wherein, the lower cross arm center platform (331) has a lower cross arm stud hole (3311); the lower cross arm front face (332) has a lower cross arm front hole A (3321) and a lower cross arm front hole B (3322); the lower cross arm back face hole B (3331) and the lower cross arm back face hole A (3332) are provided on the lower cross arm. The right short arm (34) includes a right short arm front face (341), a right short arm cross plate (342), a right short arm back face (343), and a right short arm short platform (344); wherein, the right short arm front face (341) has a right short arm front hole C (3411); the right short arm back face (343) has a right short arm back hole C (3431); and the right short arm short platform (344) has a right short arm short platform hole BA (3441). The right long arm (35) includes a front side (351), a side side (352), and an inner side (353); wherein, the front side (351) of the right long arm has a front hole C (3511) and a front hole AB (3512); the side side (352) of the right long arm has a side hole L (3521); and the inner side (353) of the right long arm has an inner side hole C (3531). The central screw (37) includes a central screw hexagonal hole (371), a central screw cylindrical surface (372), and a central screw bottom (373). The upper horizontal arm (30), left long arm (31), left short arm (32), lower horizontal arm (33), right short arm (34), and right long arm (35) are connected in sequence, with the upper horizontal arm (30) positioned at the top. The upper horizontal arm front hole A (3021) on the front (302) of the upper horizontal arm and the upper horizontal arm back hole A (3032) are connected to the left long arm front hole AB (3112) on the front (311) of the left long arm (31) via the arm shaft (36). The inner side (313) of the left long arm is hollowed out to reduce weight and enhance rigidity. The left long arm front hole C (31) is hollowed out. 11) The inner side hole C (3131) of the left long arm is connected to the front hole C (3211) of the left short arm (32) and the back hole C (3231) of the left short arm (323) via the arm shaft (36); the short platform hole BA (3241) of the left short arm (324) is connected to the front hole A (3321) of the lower horizontal arm (33) and the back hole B (3331) of the lower horizontal arm (33) via the arm shaft (36); the front hole B (3322) and the back hole B (3331) of the lower horizontal arm (324) are connected to the front hole A (3321) of the lower horizontal arm (33) via the arm shaft (36); the front hole B (3322) and the back hole B (3331) of the lower horizontal arm are connected to the front hole A (3321) of the lower horizontal arm (33) via the arm shaft (36); the front hole B (3322) of the lower horizontal arm and the back hole B (3331) of the lower horizontal arm are connected to the front hole A (3321) of the lower horizontal arm (323) via the arm shaft (36); the front hole B (3322) of the lower horizontal arm and the back hole B (3321) of the lower horizontal arm are connected to the front hole A (3321) of the lower horizontal arm (323) via the arm shaft (36); the back hole B (3321 ... The lower crossarm back hole B (3331) of the right crossarm (333) is connected to the right short arm short platform hole BA (3441) of the right short arm short platform (344) of the right short arm (34) by an arm shaft; the right short arm front hole C (3411) of the right short arm front (341), the right short arm back hole C (3431) of the right short arm back (343), the right long arm front hole C (3511) of the right long arm front (351), and the right long arm inner side hole C (3531) of the right long arm inner side (353) of the right long arm are connected by an arm shaft (36); the right long arm front hole hole AB (3512) is connected to the front hole B (3022) of the upper cross arm and the back hole B (3031) of the upper cross arm through the arm shaft (36); the bottom (373) of the center screw (37) is on the same plane as the center platform (331) of the lower cross arm, the hexagonal hole (371) of the center screw is an internal hexagonal hole for rotating the center screw (37), and the stud surface (372) of the center screw is threaded to the upper cross arm stud hole (3011) on the center platform (301) of the upper cross arm and the lower cross arm stud hole (3311) on the center platform (331) of the lower cross arm; Among them, the lengths of the left short arm horizontal plate (322) and the right short arm horizontal plate (342) need to be appropriate to avoid interference with the linkage motion; The central screw (37) of the connecting rod (3) is threadedly connected to the screw sleeve shaft hole (201). The screw sleeve shaft hole (201) is a threaded hole, and the central screw (37) is an internal hexagonal threaded rod. The central screw (37) can be fitted with a handle, forming two force application points with the file handle at the end of the file. Thin nuts (38) and spring washers (39) are located on the upper and lower sides of the upper cross arm (30). Thin nuts (38) and spring washers (39) are used to prevent loosening of the connection between the upper cross arm (30), the left long arm (31), the left short arm (32), the lower cross arm (33), the right short arm (34), the right long arm (35), the arm shaft (36), and the central screw (37), and to prevent the central screw (37) from moving during the left and right swinging of the file.

5. A three-roller file according to claim 4, characterized in that: The large concave wheel (4) includes the top of the large concave wheel connecting column (41), the large concave wheel connecting column (42), and the large concave wheel groove (43). The large concave wheel connecting post (42) of the two large concave wheels (4) is inserted into the left long arm side hole L (3121) of the left long arm side (312) and the right long arm side hole L (3521) of the right long arm side (352), respectively. The top (41) of the large concave wheel connecting post coincides with the right long arm side (352) and the left long arm side (312), respectively. The wheel groove (43) of the large concave wheel contacts the outer wall of the tube.

6. A three-roller file according to claim 1, characterized in that: The rim of the large concave wheel (4) is concave.

7. A three-roller file according to claim 1, characterized in that: The small concave wheel (23) and the large concave wheel (4) are made of nylon.

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