Brake adjustment arm hole enlarging device and hole enlarging method

Abstract

The present invention relates to the technical field of brake adjustment arm processing, and in particular to a brake adjustment arm reaming device and reaming method. The equipment includes an operating table, an adjustment part, a mounting frame and a reaming assembly. The fixing parts are respectively arranged on the horizontal operating surface and the vertical operating surface of the operating table. The adjustment part is arranged on the horizontal operating surface of the operating table. The mounting frame is located on one side of the adjustment part, and a cylinder motor combination is provided on it. The reaming assembly is located between the mounting frame and the adjustment part, and the height and speed are adjusted by the cylinder motor combination, and the reaming end thereof reams the hole by rotating force. The present invention ensures that the brake adjustment arm is horizontal and in place through two-point positioning and three-point support. The reaming end of the reaming assembly reams the hole by rotating force, and the reaming range is adjustable, and the dust removal end removes dust and debris. Ultimately, the accuracy, efficiency and environmental protection of the reaming of the brake adjustment arm are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of brake adjuster arm processing, and in particular to a brake adjuster arm hole enlarging device and a hole enlarging method. Background Art

[0002] A brake adjuster arm is installed on a car. Its housing features a splined hole in the center, worm gear teeth on the outside, a worm shaft on the side, a square on the top for brake adjustment, and a hole on the outermost side for a pin that connects to the brake cylinder. The hole, keyway, and shaft work together to transmit torque for brake adjustment. Brake adjuster arm machining requires hole enlargement, especially for the worm gear mounting hole, which has a larger diameter and requires pre-drilling before enlarging.

[0003] Existing hole-reaming equipment typically uses a tapered drill bit for reaming. As a result, the hole diameter is limited by the size of the tapered surface, requiring multiple drill bit changes to achieve the desired reaming effect. Furthermore, the brake adjustment arm, due to its irregular structure, is prone to displacement during the reaming process, compromising reaming accuracy. Summary of the Invention

[0004] To address the challenges presented in the prior art, a brake adjuster arm reaming device and method are proposed. This device utilizes two-point positioning and three-point support to ensure the brake adjuster arm is level and in place. The reaming end of the reaming assembly rotates to apply force, allowing for adjustable reaming ranges. The dust removal end removes dust and debris, ultimately achieving precise, efficient, and environmentally friendly reaming of the brake adjuster arm.

[0005] The present invention provides a brake adjustment arm hole enlarging device, comprising an operating platform, a fixing part, an adjusting part, a mounting frame and a hole enlarging component.

[0006] The operating table is provided with two sets of operating surfaces perpendicular to each other.

[0007] The fixing parts are respectively arranged on the horizontal operating surface and the vertical operating surface of the operating table. The fixing parts on the horizontal operating surface cooperate with the side holes of the brake adjustment arm, and the fixing parts on the vertical operating surface cooperate with the worm shaft holes of the brake adjustment arm.

[0008] The adjustment piece is set on the horizontal operating surface of the operating table and is adjusted to the level of the worm gear mounting hole of the brake adjustment arm by lifting and lowering.

[0009] The mounting frame 1 is located on one side of the adjusting piece, and a cylinder motor 1 combination is arranged on the mounting frame 1.

[0010] The reaming assembly is located between the mounting frame and the adjusting part. The height and speed are adjusted by a cylinder motor combination. The reaming end reams the hole by rotating force. The reaming range is adjustable. At the same time, a synchronously rotating dust removal end is provided to remove dust and debris generated by reaming.

[0011] Preferably, the reaming assembly includes a lifting rod; the lifting rod is located on the adjusting end of the cylinder motor combination, and a driving member and a rotating shaft that is rotated by the driving member are arranged on it, and a dust box is also provided; the upper and lower ends of the rotating shaft are provided with mounting seats 2, and a dust removal seat located between the two groups of mounting seats 2 and connected to the dust box and a limit seat at the bottom are also provided, and a reaming knife is provided on the periphery; the upper mounting seat 2 is installed on the lifting rod and is rotatably connected to the rotating shaft; the lower mounting seat 2 is threadedly connected to the rotating shaft; a rotating rod is provided between the reaming knife and the two groups of mounting seats 2, and the rotating rod is driven to rotate by the up and down movement of the lower mounting seat 2, thereby pushing the outer reaming knife to expand / contract synchronously in the diameter direction.

[0012] Preferably, the driving member includes motor 2, gear 1 and gear 2; a mounting cavity is set on the lifting rod; gear 1 driven by motor 2 is rotatably set on the side wall of the mounting cavity; the lower end of gear 2 rotates out of the mounting cavity, connects to the top of the rotating shaft, and the upper end engages and connects to gear 1.

[0013] Preferably, a connected cavity is provided in gear 2 and the rotating shaft; a dust collecting pipe is provided inside the cavity, and a dust collecting chamber connected to the dust removal seat is provided at the bottom; the upper end of the dust collecting pipe is connected to the dust collecting box, and the lower end is connected to the dust collecting chamber; an air pump and an air outlet with a filter are provided on the dust collecting pipe; and a dust collection head is provided on the dust removal seat.

[0014] Preferably, a slide groove with a slider is provided on the tool seat of the reaming tool; a mounting groove 1 is provided on the mounting seat 2; one end of the rotating rod extends into the mounting groove 1 and is rotatably connected to it, and the other end extends into the slide groove and is rotatably connected to the slider; the slider slides on the slide groove.

[0015] Preferably, a second mounting groove is further provided on the tool holder of the reaming tool; an elastic telescopic rod is provided on the dust removal seat; an elastic member is provided inside the elastic telescopic rod to drive the telescopic end to extend and retract, and the telescopic end extends into the second mounting groove for limiting.

[0016] Preferably, the reaming end of the reaming knife is provided with a T-slot and a second mounting frame that slides in and out of the T-slot; a plurality of sets of blades with blade surfaces inclined at forty-five degrees are spaced apart on the second mounting frame.

[0017] Preferably, the fixing member includes a threaded rod; the horizontal operating surface and the vertical operating surface of the operating table are both provided with mounting holes arranged in a matrix shape; the bottom of the threaded rod is provided with a mounting seat that cooperates with the mounting hole, and the rod body is provided with two sets of adjustment rings that cooperate with its threads.

[0018] Preferably, a through hole is provided on the horizontal operating surface of the operating table; the adjusting part includes a lifting cylinder; the upper end of the lifting cylinder is open, the edge is used to support the brake adjustment arm, the recessed inner cavity is opposite to its worm gear mounting hole, the outer wall is threadedly connected to the hole wall of the through hole, and a rotating handle is provided at the bottom.

[0019] The present invention further proposes a method for reaming a hole using the brake adjuster arm reaming device, comprising the following steps:

[0020] S1. Use fixing parts to fix the side hole of the brake adjustment arm and the worm shaft hole respectively, and use the adjusting parts to adjust the height of the worm gear mounting hole so that the brake adjustment arm is level;

[0021] S2: The cylinder motor combination drives the reaming assembly to descend and extend into the pre-drilled worm gear mounting hole; the shaft is driven by motor 2, and the lower mounting seat 2, which is threadedly connected to the shaft, moves upward; the rotating rod rotates, pushing the reaming knife to expand until it fits the inner wall of the worm gear mounting hole, and rotary reaming begins;

[0022] S3. During the reaming process, on the one hand, the reaming range of the reaming knife is continuously adjusted until the ideal hole diameter is reached. On the other hand, the dust removal seat absorbs the dust and debris generated by the reaming and transfers them to the dust collection box.

[0023] Compared with the prior art, the present invention has the following beneficial technical effects:

[0024] The present invention first uses a fixing member to position the side hole of the brake adjustment arm and the worm shaft hole, respectively, to achieve two-point positioning in the vertical and horizontal directions. The height of the worm gear mounting hole of the brake adjustment arm is then adjusted by the adjusting member. Three supports are provided to ensure that it is horizontal and in place, preparing for subsequent hole expansion. During hole expansion, the expansion end of the expansion assembly expands the hole by rotating and applying force, and the expansion range is adjustable. At the same time, a synchronously rotating dust removal end is provided to remove dust and debris generated by the expansion. Ultimately, the precision, efficiency, and environmental friendliness of the expansion of the brake adjustment arm are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram of an embodiment of the present invention (viewpoint 1);

[0026] Figure 2 A schematic structural diagram of an embodiment of the present invention (viewpoint 2);

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 for Figure 3 sectional view of

[0029] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0030] Figure 6 A partial schematic diagram of a reaming cutter in one embodiment of the present invention;

[0031] Figure 7This is a schematic structural diagram of a fixing member in an embodiment of the present invention;

[0032] Figure 8 Schematic diagram of the structure of an adjusting member in an embodiment of the present invention.

[0033] 1. Operating table; 101. Mounting hole; 2. Fixing piece; 201. Threaded rod; 202. Adjusting ring; 203. Mounting seat 1; 3. Mounting frame 1; 4. Adjusting piece; 401. Lifting cylinder; 402. Rotating handle; 5. Reaming assembly; 501. Lifting rod; 502. Mounting seat 2; 504. Rotating shaft; 505. Reaming knife; 5051. Mounting frame 2; 5052. Blade; 5053. Slide; 5055. Mounting slot 2; 506. Rotating rod; 507. Dust removal seat; 508. Dust head; 509. Elastic telescopic rod; 510. Motor 2; 511. Dust collection box; 512. Vacuum pump; 513. Gear 1; 514. Gear 2; 515. Dust collecting pipe; 516. Dust collecting chamber; 517. Limit seat. DETAILED DESCRIPTION Example

[0034] like Figure 1-Figure 2 As shown, a brake adjustment arm reaming device proposed in the present invention includes an operating platform 1, a fixing part 2, an adjusting part 4, a mounting frame 3 and a reaming assembly 5.

[0035] The operating table 1 is provided with two sets of operating surfaces perpendicular to each other.

[0036] The fixing parts 2 are respectively arranged on the horizontal operating surface and the vertical operating surface of the operating table 1. The fixing part 2 located on the horizontal operating surface cooperates with the side hole of the brake adjustment arm, and the fixing part 2 located on the vertical operating surface cooperates with the worm shaft hole of the brake adjustment arm.

[0037] The adjusting member 4 is provided through the horizontal operating surface of the operating platform 1 and is adjusted to the level of the worm gear mounting hole of the brake adjusting arm by lifting and lowering.

[0038] The mounting frame 1 3 is located on one side of the adjusting member 4 , and a cylinder-motor combination is provided on the mounting frame 1 3 .

[0039] The reaming assembly 5 is located between the mounting frame 3 and the adjusting member 4. The height and speed are adjusted by a cylinder motor combination. The reaming end reams the hole by rotating force. The reaming range is adjustable. At the same time, a synchronously rotating dust removal end is provided to remove dust and debris generated by reaming.

[0040] In this embodiment, the preferred method is to use the fixing member 2 to align with the side hole of the brake adjustment arm and the worm shaft hole, achieving two-point positioning in the vertical and horizontal directions. The height of the worm gear mounting hole of the brake adjustment arm is then adjusted using the adjusting member 4 to achieve three-point support, ensuring its horizontality and position, in preparation for subsequent hole expansion. During hole expansion, the expansion end of the expansion assembly 5 applies force through rotation, and the expansion range is adjustable. A synchronously rotating dust removal end is also provided to remove dust and debris generated by the expansion. Ultimately, accurate, efficient, and environmentally friendly expansion of the brake adjustment arm is achieved. Example

[0041] like Figure 1-Figure 2 As shown, a brake adjustment arm reaming device proposed in the present invention includes an operating platform 1, a fixing part 2, an adjusting part 4, a mounting frame 3 and a reaming assembly 5.

[0042] The operating table 1 is provided with two sets of operating surfaces perpendicular to each other.

[0043] The fixing parts 2 are respectively arranged on the horizontal operating surface and the vertical operating surface of the operating table 1. The fixing part 2 located on the horizontal operating surface cooperates with the side hole of the brake adjustment arm, and the fixing part 2 located on the vertical operating surface cooperates with the worm shaft hole of the brake adjustment arm.

[0044] The adjusting member 4 is provided through the horizontal operating surface of the operating platform 1 and is adjusted to the level of the worm gear mounting hole of the brake adjusting arm by lifting and lowering.

[0045] The mounting frame 1 3 is located on one side of the adjusting member 4 , and a cylinder-motor combination is provided on the mounting frame 1 3 .

[0046] The reaming assembly 5 is located between the mounting frame 3 and the adjusting member 4. The height and speed are adjusted by a cylinder motor combination. The reaming end reams the hole by rotating force. The reaming range is adjustable. At the same time, a synchronously rotating dust removal end is provided to remove dust and debris generated by reaming.

[0047] like Figure 3-Figure 4 As shown, the reaming assembly 5 includes a lifting rod 501; the lifting rod 501 is located on the adjusting end of the cylinder motor combination, and a driving member and a rotating shaft 504 that is rotated by the driving member are arranged on it, and a dust box 511 is also provided; the upper and lower ends of the rotating shaft 504 are provided with a mounting seat 2 502, and a dust removal seat 507 located between the two groups of mounting seats 2 502 and connected to the dust box 511 and a limiting seat 517 at the bottom are also provided, and a reaming knife 505 is arranged on the periphery; the upper mounting seat 2 502 is installed on the lifting rod 501 and is rotatably connected to the rotating shaft 504; the lower mounting seat 2 502 is threadedly connected to the rotating shaft 504; a rotating rod 506 is provided between the reaming knife 505 and the two groups of mounting seats 2 502, and the upper and lower movements of the lower mounting seat 2 502 drive the rotating rod 506 to rotate, thereby pushing the peripheral reaming knife 505 to expand / contract synchronously in the diameter direction.

[0048] like Figure 4 As shown, the driving part includes motor 2 510, gear 1 513 and gear 2 514; a mounting cavity is set on the lifting rod 501; gear 1 513 driven by motor 2 510 is rotatably set on the side wall of the mounting cavity; the lower end of gear 2 514 rotates and extends out of the mounting cavity, connected to the top of the rotating shaft 504, and the upper end is engaged with gear 1 513.

[0049] like Figure 4 As shown, a connected cavity is provided inside gear 2 514 and the rotating shaft 504; a dust collecting pipe 515 is provided inside the cavity, and a dust collecting chamber 516 connected to the dust removal seat 507 is provided at the bottom; the upper end of the dust collecting pipe 515 is connected to the dust collecting box 511, and the lower end is connected to the dust collecting chamber 516; an air pump 512 and an air outlet with a filter are provided on the dust collecting pipe 515; and a dust collecting head 508 is provided on the dust removal seat 507.

[0050] like Figure 5 As shown, a slide groove 5053 with a slider is provided on the tool seat of the reaming knife 505; a mounting groove 1 is provided on the mounting seat 2 502; one end of the rotating rod 506 extends into the mounting groove 1 and is rotatably connected to it, and the other end extends into the slide groove 5053 and is rotatably connected to the slider; the slider slides on the slide groove 5053.

[0051] like Figure 3-Figure 5 As shown, a second mounting groove 5055 is also provided on the tool holder of the reaming knife 505; an elastic telescopic rod 509 is provided on the dust removal seat 507; the elastic telescopic rod 509 is internally provided with an elastic member to drive the telescopic end to extend and retract, and the telescopic end extends into the second mounting groove 5055 for limiting.

[0052] like Figure 6 As shown, the reaming end of the reaming knife 505 is provided with a T-slot and a second mounting frame 5051 that slides in and out of the T-slot; a plurality of sets of blades 5052 with a blade surface inclined at 45 degrees are arranged at intervals on the second mounting frame 5051.

[0053] In this embodiment, the reaming assembly 5 is configured to extend into the pre-drilled worm gear mounting hole before reaming. Then, driven by motor 2 510, gears 1 513 and 2 514 engage, causing the rotating shaft 504 to rotate. At this point, the lower mounting bracket 502, threadedly connected to the rotating shaft 504, moves upward, while the rotating rod 506 rotates, pushing the reaming blade 505 to expand until it contacts the inner wall of the worm gear mounting hole. The blade 5052 begins rotating to reame the hole. The retractable end of the elastic telescopic rod 509, driven by an elastic member (spring), continuously pushes the reaming blade 505 outward, ensuring a tight fit between the blade 5052 and the hole wall. To replace the blade 5052, simply slide the mounting bracket 5051 in and out of the T-slot, making operation simple and convenient. Furthermore, while reaming, the vacuum pump 512 operates, creating a negative pressure near the vacuum head 508, sucking in dust and debris. After reaming is complete, the dust box 511 can be cleaned directly. Example

[0054] like Figure 1-Figure 2 As shown, a brake adjustment arm reaming device proposed in the present invention includes an operating platform 1, a fixing part 2, an adjusting part 4, a mounting frame 3 and a reaming assembly 5.

[0055] The operating table 1 is provided with two sets of operating surfaces perpendicular to each other.

[0056] The fixing parts 2 are respectively arranged on the horizontal operating surface and the vertical operating surface of the operating table 1. The fixing part 2 located on the horizontal operating surface cooperates with the side hole of the brake adjustment arm, and the fixing part 2 located on the vertical operating surface cooperates with the worm shaft hole of the brake adjustment arm.

[0057] The adjusting member 4 is provided through the horizontal operating surface of the operating platform 1 and is adjusted to the level of the worm gear mounting hole of the brake adjusting arm by lifting and lowering.

[0058] The mounting frame 1 3 is located on one side of the adjusting member 4 , and a cylinder-motor combination is provided on the mounting frame 1 3 .

[0059] The reaming assembly 5 is located between the mounting frame 3 and the adjusting member 4. The height and speed are adjusted by a cylinder motor combination. The reaming end reams the hole by rotating force. The reaming range is adjustable. At the same time, a synchronously rotating dust removal end is provided to remove dust and debris generated by reaming.

[0060] like Figure 3-Figure 4As shown, the reaming assembly 5 includes a lifting rod 501; the lifting rod 501 is located on the adjusting end of the cylinder motor combination, and a driving member and a rotating shaft 504 that is rotated by the driving member are arranged on it, and a dust box 511 is also provided; the upper and lower ends of the rotating shaft 504 are provided with a mounting seat 2 502, and a dust removal seat 507 located between the two groups of mounting seats 2 502 and connected to the dust box 511 and a limiting seat 517 at the bottom are also provided, and a reaming knife 505 is arranged on the periphery; the upper mounting seat 2 502 is installed on the lifting rod 501 and is rotatably connected to the rotating shaft 504; the lower mounting seat 2 502 is threadedly connected to the rotating shaft 504; a rotating rod 506 is provided between the reaming knife 505 and the two groups of mounting seats 2 502, and the upper and lower movements of the lower mounting seat 2 502 drive the rotating rod 506 to rotate, thereby pushing the peripheral reaming knife 505 to expand / contract synchronously in the diameter direction.

[0061] like Figure 4 As shown, the driving part includes motor 2 510, gear 1 513 and gear 2 514; a mounting cavity is set on the lifting rod 501; gear 1 513 driven by motor 2 510 is rotatably set on the side wall of the mounting cavity; the lower end of gear 2 514 rotates and extends out of the mounting cavity, connected to the top of the rotating shaft 504, and the upper end is engaged with gear 1 513.

[0062] like Figure 4 As shown, a connected cavity is provided inside gear 2 514 and the rotating shaft 504; a dust collecting pipe 515 is provided inside the cavity, and a dust collecting chamber 516 connected to the dust removal seat 507 is provided at the bottom; the upper end of the dust collecting pipe 515 is connected to the dust collecting box 511, and the lower end is connected to the dust collecting chamber 516; an air pump 512 and an air outlet with a filter are provided on the dust collecting pipe 515; and a dust collecting head 508 is provided on the dust removal seat 507.

[0063] like Figure 5 As shown, a slide groove 5053 with a slider is provided on the tool seat of the reaming knife 505; a mounting groove 1 is provided on the mounting seat 2 502; one end of the rotating rod 506 extends into the mounting groove 1 and is rotatably connected to it, and the other end extends into the slide groove 5053 and is rotatably connected to the slider; the slider slides on the slide groove 5053.

[0064] like Figure 3-Figure 5 As shown, a second mounting groove 5055 is also provided on the tool holder of the reaming knife 505; an elastic telescopic rod 509 is provided on the dust removal seat 507; the elastic telescopic rod 509 is internally provided with an elastic member to drive the telescopic end to extend and retract, and the telescopic end extends into the second mounting groove 5055 for limiting.

[0065] like Figure 6 As shown, the reaming end of the reaming knife 505 is provided with a T-slot and a second mounting frame 5051 that slides in and out of the T-slot; a plurality of sets of blades 5052 with a blade surface inclined at 45 degrees are arranged at intervals on the second mounting frame 5051.

[0066] like Figure 7 As shown, the fixing member 2 includes a threaded rod 201; the horizontal operating surface and the vertical operating surface of the operating table 1 are both provided with mounting holes 101 arranged in a matrix; the bottom of the threaded rod 201 is provided with a mounting seat 203 that cooperates with the mounting hole 101, and two sets of adjustment rings 202 that cooperate with the thread are provided on the rod body.

[0067] like Figure 8 As shown, a through hole is provided on the horizontal operating surface of the operating table 1; the adjusting part 4 includes a lifting cylinder 401; the upper end of the lifting cylinder 401 is open, and the edge is used to support the brake adjustment arm, the recessed inner cavity is opposite to its worm gear mounting hole, the outer wall is threadedly connected to the hole wall of the through hole, and a rotating handle 402 is provided at the bottom.

[0068] In this embodiment, the specific structure of the fixing member 2 and the adjusting member 4 is provided. When positioning the brake adjusting arm, it is necessary to first select the appropriate mounting hole 101 based on the size and specifications of the brake adjusting arm, and then secure the threaded rod 201 through threaded connections, snap-fit ​​connections, or other methods. First, a set of adjustment rings 202 are screwed on. Next, the side holes and worm shaft holes of the brake adjusting arm are inserted into the corresponding threaded rods 201. Finally, another set of adjustment rings 202 are screwed on to clamp and secure the side holes and worm shaft holes of the brake adjusting arm from both sides. Adjustment requires turning the rotating handle 402, which causes the lifting cylinder 401 to rotate and move up and down, providing further support and positioning for the brake adjusting arm, keeping it level and stable during the hole expansion process. Example

[0069] The present invention further proposes a method for reaming a hole using the brake adjuster arm reaming device, comprising the following steps:

[0070] S1. Use the fixing member 2 to fix the side hole of the brake adjustment arm and the worm shaft hole respectively, and use the adjusting member 4 to adjust the height of the worm gear mounting hole so that the brake adjustment arm is level;

[0071] S2. The cylinder motor combination drives the reaming assembly 5 to descend and extend into the pre-drilled worm gear mounting hole; the motor 2 510 drives the rotating shaft 504 to rotate; the lower mounting seat 2 502, which is threadedly connected to the rotating shaft 504, moves upward; the rotating rod 506 rotates, pushing the reaming knife 505 to expand until it fits the inner wall of the worm gear mounting hole, and the reaming begins;

[0072] S3. During the reaming process, the reaming range of the reaming knife 505 is continuously adjusted until the ideal hole diameter is reached. On the other hand, the dust removal seat 507 absorbs the dust and debris generated by the reaming and transfers them to the dust collection box 511.

[0073] In this embodiment, the brake adjuster arm reaming equipment utilizes a two-point positioning and three-point support method to maintain a stable and level brake adjuster arm. This method then utilizes simultaneous reaming and dust removal to pre-drill the holes. This simple operation method ensures efficient and environmentally friendly reaming.

[0074] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A brake adjustment arm reaming device, characterized in that: include: An operating table (1) is provided with two sets of mutually perpendicular operating surfaces; The fixing member (2) is respectively arranged on the horizontal operating surface and the vertical operating surface of the operating table (1), the fixing member (2) located on the horizontal operating surface cooperates with the side hole of the brake adjustment arm, and the fixing member (2) located on the vertical operating surface cooperates with the worm shaft hole of the brake adjustment arm; An adjusting member (4) is provided on a horizontal operating surface of the operating table (1) and is used to adjust the level of the worm gear mounting hole of the brake adjusting arm by lifting and lowering; A mounting frame (3) is located on one side of the adjusting member (4), and a cylinder motor combination is provided on the mounting frame; and a reaming assembly (5), located between a mounting frame (3) and an adjusting member (4), wherein the height and the rotation speed are adjusted by a cylinder motor combination, the reaming end reaming the hole by rotating and applying force, the reaming range is adjustable, and a synchronously rotating dust removal end is provided to remove dust and debris generated by the reaming; The fixing member (2) includes a threaded rod (201); the horizontal operating surface and the vertical operating surface of the operating table (1) are both provided with mounting holes (101) arranged in a matrix; the bottom of the threaded rod (201) is provided with a mounting seat (203) that cooperates with the mounting hole (101), and the rod body is provided with two sets of adjustment rings (202) that cooperate with the threaded rod; The hole enlarging assembly (5) includes a lifting rod (501); the lifting rod (501) is located on the adjustment end of the cylinder motor combination, and a driving member and a rotating shaft (504) that is driven by the driving member to realize rotation are provided on the lifting rod (501), and a dust collecting box (511) is also provided; the upper and lower ends of the rotating shaft (504) are both provided with a second mounting seat (502), and a dust removal seat (507) located between the two groups of second mounting seats (502) and connected to the dust collecting box (511) and a limit seat (517) at the bottom are also provided, and the outer periphery is provided with a second mounting seat (502). Reaming knife (505); the upper mounting seat 2 (502) is mounted on the lifting rod (501) and is rotatably connected to the rotating shaft (504); the lower mounting seat 2 (502) is threadedly connected to the rotating shaft (504); a rotating rod (506) is provided between the reaming knife (505) and the two sets of mounting seats 2 (502), and the rotating rod (506) is driven to rotate by the up and down movement of the lower mounting seat 2 (502), thereby pushing the peripheral reaming knife (505) to expand / contract synchronously in the diameter direction; A slide groove (5053) with a slider is provided on the tool seat of the reaming knife (505); a mounting groove 1 is provided on the second mounting seat (502); one end of the rotating rod (506) extends into the mounting groove 1 and is rotatably connected thereto, and the other end extends into the slide groove (5053) and is rotatably connected to the slider; the slider slides on the slide groove (5053).

2. The brake adjustment arm reaming device according to claim 1, characterized in that: The driving member includes a second motor (510), a first gear (513) and a second gear (514); a mounting cavity is provided on the lifting rod (501); the first gear (513) driven by the second motor (510) is rotatably provided on the side wall of the mounting cavity; the lower end of the second gear (514) is rotated and extended out of the mounting cavity, connected to the top of the rotating shaft (504), and the upper end is meshed and connected to the first gear (513).

3. The brake adjustment arm reaming device according to claim 2, characterized in that: A cavity is provided in communication with the gear 2 (514) and the rotating shaft (504); a dust collecting pipe (515) is provided in the cavity, and a dust collecting chamber (516) connected to the dust removal seat (507) is provided at the bottom; the upper end of the dust collecting pipe (515) is connected to the dust collecting box (511), and the lower end is connected to the dust collecting chamber (516); an air pump (512) and an air outlet with a filter are provided on the dust collecting pipe (515); and a dust collecting head (508) is provided on the dust removal seat (507).

4. The brake adjuster arm reaming device according to claim 1, characterized in that: A second mounting groove (5055) is also provided on the knife seat of the reaming knife (505); an elastic telescopic rod (509) is provided on the dust removal seat (507); an elastic member is provided inside the elastic telescopic rod (509) to drive the telescopic end to extend and retract, and the telescopic end extends into the second mounting groove (5055) for limiting.

5. The brake adjuster arm hole enlarging device according to claim 4, characterized in that: The reaming end of the reaming knife (505) is provided with a T-slot and a second mounting frame (5051) that slides in and out of the T-slot; a plurality of blades (5052) with blade surfaces inclined at 45 degrees are arranged at intervals on the second mounting frame (5051).

6. The brake adjuster arm hole enlarging device according to claim 1, characterized in that: A through hole is provided on the horizontal operating surface of the operating table (1); the adjusting member (4) includes a lifting cylinder (401); the upper end of the lifting cylinder (401) is open, the edge is used to support the brake adjustment arm, the recessed inner cavity is opposite to the worm gear mounting hole, the outer wall is threadedly connected to the hole wall of the through hole, and a rotating handle (402) is provided at the bottom.

7. A method for enlarging a brake adjuster arm comprising the enlarging device according to any one of claims 1 to 6, characterized in that: Here are the steps: S1, using the fixing member (2) to respectively position the side hole of the brake adjustment arm and the worm shaft hole, and using the adjusting member (4) to adjust the height of the worm gear mounting hole so that the brake adjustment arm is horizontal; S2, the cylinder motor combination drives the reaming assembly (5) to descend and extend into the pre-drilled worm gear mounting hole; driven by the second motor (510), the rotating shaft (504) rotates; the lower mounting seat (502) threadedly connected to the rotating shaft (504) moves upward; the rotating rod (506) rotates, pushing the reaming knife (505) to expand until it fits the inner wall of the worm gear mounting hole, and starts rotating to reame; S3. During the hole enlarging process, the enlarging range of the reaming knife (505) is continuously adjusted until the ideal hole diameter is reached. On the other hand, the dust removal seat (507) removes the dust and debris generated by the hole enlarging and transfers them to the dust collection box (511).

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