A drilling device for the side arm frame of a road roller

Abstract

The present invention relates to a drilling device for a side arm frame of a road roller in the field of cutting and processing equipment. The device comprises a mounting cylinder which is circumferentially distributed on a rotating cylinder and is connected to a drill bit. When the drill bit needs to be replaced during the drilling operation, the reverse rotation of a driving motor and the one-way transmission of a ratchet gear are utilized to enable the rotating cylinder to drive the drill bit thereon to rotate and switch, and at the same time, an electric telescopic cylinder is coordinated to drive a plug-in rod to move up and down to realize the plug-in and disengagement of the plug-in rod and the mounting cylinder. The operation is simple and fast, and no tedious manual operation is required. The switching and use process of drill bits of different specifications can be realized quickly, and multi-specification drilling operations can be performed on workpieces. In addition, a jet chamber is arranged in the mounting cylinder and a sleeve which is connected to a hollow cavity in the plug-in rod, so that efficient injection of cutting fluid can be realized, and the drill bit in the drilling operation position can be immersively flushed and cooled, thereby improving the effect of flushing, removing impurities and cooling the drill bit with the cutting fluid.

Description

Technical Field

[0001] The invention relates to a roller parts processing device, in particular to a roller side arm frame punching device applied to the field of cutting processing equipment. Background Art

[0002] The roller frame includes a main frame and an arm frame installed at the front end of the main frame for installing a roller. The arm frame needs to connect the main frame and the roller and also needs to be used to install a vibration mechanism. It is necessary to open a plurality of bolt holes of different specifications on the arm frame.

[0003] Existing roller drilling equipment requires drill bit replacement when drilling holes of different specifications, and mainly relies on manual replacement, which is time-consuming and cumbersome to operate. Summary of the invention

[0004] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the drill bit replacement of the existing drilling equipment relies on manual operation, which is time-consuming and cumbersome.

[0005] In order to solve the above problems, the present invention provides a punching device for a side arm frame of a road roller, comprising a punching mechanism fixedly connected to an external mechanical arm, the punching mechanism comprising a rotating cylinder, one end of the rotating cylinder is rotatably connected to a fixed cover, the fixed cover is fixedly connected to a fixed frame fixedly connected to the front end of the external mechanical arm; the circumferential side wall of the rotating cylinder is penetrated by mounting cylinders that are equidistantly distributed on the circumference and rotatably connected thereto, the outer end of the mounting cylinder is fixedly connected to a detachable drill bit, the inner end of the mounting cylinder is plugged with a plug-in rod, the plug-in rod is slidably sleeved with a prismatic cylinder, the prismatic cylinder is rotatably connected to a mounting frame fixedly connected to the fixed cover, the upper end of the prismatic cylinder is connected to a transmission shaft through a transmission gear set, and the transmission shaft is connected to the output shaft of a driving motor;

[0006] A sleeve rotatably connected to the middle of the plug-in rod is sleeved, and a lifting plate is fixedly connected to the sleeve, and the lifting plate is connected to an electric telescopic cylinder fixedly connected to the mounting frame; a driving gear is fixedly sleeved on the transmission shaft, and the driving gear is meshed with a ratchet gear, and the ratchet gear is fixedly connected with a worm rotatably connected to the fixed cover, and the worm is meshed with a worm wheel, and the worm wheel is fixedly connected with a radial shaft, and a driving gear is fixedly connected to the outer end of the radial shaft, and the driving gear is meshed with a passive gear ring fixedly connected to the inner wall of the rotating cylinder;

[0007] A liquid inlet chamber is provided in the installation tube, and a jet chamber with an opening toward the drill bit is connected to the lower part of the liquid inlet chamber. A hollow chamber connected to the liquid inlet chamber is provided in the connecting rod, and the hollow chamber is connected to the inner chamber of the sleeve through a connecting hole provided on the side wall of the connecting rod. A liquid inlet pipe is connected to the outer end of the sleeve, and the liquid inlet pipe is connected to an external cutting fluid delivery pump.

[0008] In the drilling device of the roller side arm frame, the drill bit can be quickly switched by means of the mounting cylinders which are circumferentially distributed on the rotating cylinder and the plug-in rods which cooperate with the mounting cylinders and are transmission-connected to the driving motor.

[0009] As a further improvement of the present application, a grinding head is fixedly connected inside one of the mounting tubes, and the grinding head includes a mounting column fixedly connected to the mounting tube by bolts, and a plurality of circularly distributed grinding strips slidably connected thereto are clamped on the upper end of the mounting column, and a guide rod passes through the lower part of the grinding strip, and the guide rod sleeve is provided with a coil spring that abuts against the inner side of the grinding strip.

[0010] As a further improvement of the present application, the rotating cylinder is a horizontally arranged cylindrical structure, the mounting cylinder is rotatably connected to the circumferential side wall of the rotating cylinder through a bearing, the drill bit is fixedly connected to the mounting cylinder through a fixing bolt, and the mounting cylinder is provided with a mounting hole for mounting the drill bit.

[0011] As a further improvement of the present application, the lower end of the plug-in rod is pointed and is provided with plug-in strips distributed in a circle. The transverse cross-section of the plug-in strip is a right-angled trapezoid with the tip facing downward. The outer edge of the plug-in strip is a rounded surface. The upper end of the mounting tube is provided with a plug-in cavity that cooperates with the lower end of the plug-in rod.

[0012] As a further improvement of the present application, the prismatic tube is provided with a prismatic cavity for the vertical sliding of the plug-in rod, and the cross section of the prismatic cavity is a regular polygon.

[0013] As a further improvement of the present application, the ratchet gear includes a gear ring meshing with the driving gear and a pawl plate nested in the gear ring and fixedly connected to the radial shaft.

[0014] As a further improvement of the present application, a valve plate for sealing the lower opening is provided at the lower opening of the hollow cavity, a spring telescopic rod is fixedly connected to the upper end of the valve plate, the spring telescopic rod is fixedly connected to a fixed plate fixedly connected to the inner wall of the hollow cavity, and an extrusion rod cooperating with the valve plate is provided in the liquid inlet cavity.

[0015] As a further improvement of the present application, a disc integrally formed therewith is provided at the upper end of the mounting column, a plurality of radial grooves cooperating with the grinding strips are provided on the disc, both the guide rod and the coil spring are installed in the radial grooves, and the grinding strip is a strip-shaped structure with a pointed upper end and an arc-shaped outer end face.

[0016] To summarize, the present invention has a mounting cylinder which is installed on a rotating cylinder in a circumferential distribution and connected to a drill bit. When the drill bit needs to be replaced during the drilling operation, the reverse rotation of the driving motor and the one-way transmission of the ratchet gear are utilized to enable the rotating cylinder to drive the drill bit thereon to rotate and switch, and at the same time cooperate with the electric telescopic cylinder to drive the plug-in rod to move up and down to realize the plug-in and disengagement of the plug-in rod and the mounting cylinder. The operation is simple and fast, and no tedious manual operation is required. The switching and use process of drill bits of different specifications can be quickly realized, and multi-specification drilling operations can be performed on the workpiece. In addition, the jet chamber provided in the mounting cylinder and the sleeve connected to the hollow cavity of the plug-in rod can realize efficient injection of cutting fluid, and the drill bit in the drilling operation position is immersively flushed and cooled, thereby improving the effect of flushing, removing impurities and cooling the drill bit with the cutting fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the present application from a rear side perspective;

[0018] Figure 2 This is a schematic diagram of the internal structure of the rotating drum in this application;

[0019] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0020] Figure 4 This is a schematic diagram of the longitudinal cross-sectional structure of the present application;

[0021] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at B in the middle;

[0022] Figure 6 for Figure 4 Schematic diagram of the enlarged structure at C in the middle;

[0023] Figure 7 It is a schematic diagram of the cross-sectional structure of the prismatic tube in this application;

[0024] Figure 8 It is a three-dimensional structural schematic diagram of the plug-in rod in this application;

[0025] Fig. 9 It is a schematic cross-sectional structure diagram of the installation tube in this application;

[0026] Fig.10 It is a schematic diagram of the assembly of the ratchet gear and the worm in this application;

[0027] Fig.11 This is a schematic diagram of the rotating state of the rotating drum in this application;

[0028] Fig.12 for Figure 4 Schematic diagram of the enlarged structure at D in the middle;

[0029] Fig.13 It is a schematic diagram of the exploded structure of the grinding mechanism in this application.

[0030] Description of the numbers in the figure:

[0031] 1. Rotating cylinder; 2. Fixed cover; 3. Fixed frame; 4. Mounting cylinder; 401. Plug-in cavity; 402. Mounting hole; 403. Liquid inlet cavity; 404. Jet cavity; 5. Drill bit; 6. Grinding head; 7. Fixing bolt; 8. Plug-in rod; 801. Hollow cavity; 802. Plug-in strip; 9. Prismatic cylinder; 10. Mounting frame; 11. Transmission gear set; 12. Transmission shaft; 13. Driving motor; 14. Sleeve; 15. Lifting plate; 16. Electric telescopic cylinder; 17. Driving gear; 18. Ratchet gear; 1801. Gear ring; 1802. Ratchet plate; 19. Worm; 20. Worm wheel; 21. Radial shaft; 22. Driving gear; 23. Passive gear ring; 24. Valve plate; 25. Spring telescopic rod; 26. Extrusion rod; 27. Liquid inlet pipe; 28. Mounting column; 2801. Radial slide groove; 29. ​​Grinding strip; 30. Guide rod; 31. Coil spring. DETAILED DESCRIPTION

[0032] The following describes two implementation modes of the present application in detail with reference to the accompanying drawings.

[0033] The first implementation method:

[0034] Figure 1-11 A punching device for a side arm frame of a road roller is shown, including a punching mechanism fixedly connected to an external mechanical arm, the punching mechanism including a rotating cylinder 1, one end of the rotating cylinder 1 is rotatably connected to a fixed cover 2, the fixed cover 2 is fixedly connected to a fixed frame 3 fixedly connected to the front end of the external mechanical arm; the circumferential side wall of the rotating cylinder 1 is penetrated by mounting cylinders 4 which are equidistantly distributed around the circumference and rotatably connected thereto, the outer end of the mounting cylinder 4 is fixedly connected to a detachable drill bit 5, the inner end of the mounting cylinder 4 is plugged with a plug-in rod 8, the plug-in rod 8 is slidably sleeved with a prism cylinder 9, the prism cylinder 9 is rotatably connected to a mounting frame 10 fixedly connected to the fixed cover 2, the upper end of the prism cylinder 9 is connected to a transmission shaft 12 through a transmission gear set 11, the transmission shaft 12 is connected to the output shaft of a driving motor 13, the driving motor 13 drives the prism cylinder 9 to rotate through the transmission shaft 12 and the transmission gear set 11, the prism cylinder 9 drives the mounting cylinder 4 to rotate through the plug-in rod 8, and the mounting cylinder 4 drives the drill bit 5 to rotate;

[0035] A sleeve 14 is sleeved in the middle of the plug rod 8 and is rotatably connected thereto. The sleeve 14 is fixedly connected to a lifting plate 15. The lifting plate 15 is connected to an electric telescopic cylinder 16 fixedly connected to the mounting frame 10. The electric telescopic cylinder 16 drives the sleeve 14 to move up and down through the lifting plate 15. The sleeve 14 drives the plug rod 8 to move up and down, thereby realizing the connection and disconnection with the plug rod 8 and the mounting cylinder 4.

[0036] A driving gear 17 is fixedly sleeved on the transmission shaft 12, and the driving gear 17 is meshed with a ratchet gear 18. The ratchet gear 18 is fixedly connected to a worm 19 rotatably connected to the fixed cover 2, and the worm 19 is meshed with a worm wheel 20. The worm wheel 20 is fixedly connected to a radial shaft 21, and a driving gear 22 is fixedly connected to the outer end of the radial shaft 21. The driving gear 22 is meshed with a passive gear ring 23 fixedly connected to the inner wall of the rotating cylinder 1. The transmission shaft 12 drives the radial shaft 21 to rotate in one direction through the driving gear 17 and the ratchet gear 18, and the radial shaft 21 drives the passive gear ring 23 and the rotating cylinder 1 to rotate through the driving gear 22, and the rotating cylinder 1 drives the mounting cylinder 4 and the drill bit 5 thereon to rotate and switch;

[0037] A liquid inlet chamber 403 is provided in the mounting tube 4, and a jet chamber 404 opening toward the drill bit 5 is connected to the lower portion of the liquid inlet chamber 403. The plug-in rod 8 is provided with a hollow chamber 801 connected to the liquid inlet chamber 403. The hollow chamber 801 is connected to the inner chamber of the sleeve 14 via a connecting hole provided on the side wall of the plug-in rod 8. The outer end of the sleeve 14 is connected to a liquid inlet pipe 27, and the liquid inlet pipe 27 is connected to an external cutting fluid delivery pump.

[0038] For details, please refer to Fig.11 , including the following steps:

[0039] Step 1: The external mechanical arm drives the punching mechanism to move to the top of the side arm frame, starts the drive motor 13, and makes the drive motor 13 rotate forward. The drive motor 13 drives the installation tube 4 and the drill bit 5 installed thereon to rotate through the transmission shaft 12, the prism tube 9 and the plug-in rod 8, and then the external mechanical arm drives the drill bit 5 to move downward to perform the punching operation;

[0040] Step 2: After a single hole is drilled, the external mechanical arm drives the drill bit 5 to separate from the side arm frame. When the drill bit 5 needs to be switched, the electric telescopic cylinder 16 is started to separate the plug-in rod 8 from the mounting tube 4. Then the drive motor 13 is started and reversed. The drive motor 13 drives the ratchet gear 18 and the worm 19 to rotate through the transmission shaft 12 and the driving gear 17. The worm 19 drives the drive gear 22 to rotate through the worm wheel 20 and the radial shaft 21. The drive gear 22 drives the passive gear ring 23 and the rotating tube 1 to rotate, thereby switching the drill bit 5.

[0041] Step three, after the switching is completed, start the electric telescopic cylinder 16 again, so that the plug-in rod 8 is inserted into the installation tube 4 again and connected with it, and then start the drive motor 13 and make it run forward, and use the replaced drill bit 5 to drill with the cooperation of the external robot arm.

[0042] It should be noted that during the drilling process, the external cutting fluid delivery pump is started to inject the cutting fluid into the hollow cavity 801 of the plug-in rod 8 through the liquid inlet pipe 27 and the sleeve 14, and then spray out from the jet cavity 404 after passing through the liquid inlet cavity 403 to flush and cool the rotating drill bit 5.

[0043] Compared with the traditional drilling device of the side arm frame of the roller, the present invention has a mounting cylinder 4 which is installed on the rotating cylinder 1 in a circumferential distribution and is connected to a drill bit 5. When the drill bit 5 needs to be replaced during the drilling operation, the reverse rotation of the driving motor 13 and the unidirectional transmission of the ratchet gear 18 are utilized to enable the rotating cylinder 1 to drive the drill bit 5 thereon to rotate and switch, and at the same time cooperate with the electric telescopic cylinder 16 to drive the plug-in rod 8 to move up and down to realize the plug-in and disconnection of the plug-in rod 8 and the mounting cylinder 4. The operation is simple and fast, and no tedious manual operation is required. In addition, by means of the jet chamber 404 arranged in the mounting cylinder 4 and the sleeve 14 connected to the hollow cavity 801 in the plug-in rod 8, efficient injection of cutting fluid is achieved, and the drill bit 5 in the drilling operation position is immersively flushed and cooled, thereby improving the effect of flushing, removing impurities and cooling the drill bit 5 with the cutting fluid.

[0044] See also Figure 2 and Fig. 9 The rotating cylinder 1 is a horizontally arranged cylindrical structure. The mounting cylinder 4 is rotatably connected to the circumferential side wall of the rotating cylinder 1 through a bearing. The drill bit 5 is fixedly connected to the mounting cylinder 4 through a fixing bolt 7. The mounting cylinder 4 is provided with a mounting hole 402 for mounting the drill bit 5.

[0045] Specifically, the drill bit 5 is rotated and switched by the horizontally arranged rotating cylinder 1, and the drill bit 5 on the mounting cylinder 4 can be conveniently disassembled and replaced as needed.

[0046] See also Figure 5 and Figure 8 The lower end of the plug rod 8 is pointed and is provided with plug strips 802 distributed in a circle. The transverse cross-section of the plug strip 802 is a right-angled trapezoid with the tip facing downward. The outer edge of the plug strip 802 is a rounded surface. The upper end of the installation tube 4 is provided with a plug cavity 401 that cooperates with the lower end of the plug rod 8.

[0047] Specifically, it is convenient for the plug-in rod 8 and the installation tube 4 to realize plug-in transmission and quick disengagement.

[0048] See also Figure 7 The prismatic tube 9 is provided with a prismatic cavity for the vertical sliding of the plug-in rod 8, and the cross section of the prismatic cavity is a regular polygon.

[0049] Specifically, when the plug-in rod 8 is separated from the installation tube 4 , it slides up and down in the prismatic tube 9 without affecting the rotational torque transmission between the plug-in rod 8 and the prismatic tube 9 .

[0050] See also Fig.10The ratchet gear 18 includes a gear ring 1801 meshing with the driving gear 17 and a pawl plate 1802 nested in the gear ring 1801 and fixedly connected to the radial shaft 21 .

[0051] Specifically, the one-way transmission is realized by the ratchet gear 18, so that the drill bit 5 can be switched when the driving motor 13 is reversed.

[0052] See also Figure 5 and Fig. 9 A valve plate 24 for sealing the lower opening is provided at the lower opening of the hollow cavity 801, a spring telescopic rod 25 is fixedly connected to the upper end of the valve plate 24, the spring telescopic rod 25 is fixedly connected to a fixed plate fixedly connected to the inner wall of the hollow cavity 801, and an extrusion rod 26 cooperating with the valve plate 24 is provided in the liquid inlet cavity 403.

[0053] See also Fig. 9 The jet chamber 404 is provided with a plurality of jet chambers 404 and is equidistantly distributed on the outside of the liquid inlet chamber 403 in a circular pattern.

[0054] Specifically, when the plug-in rod 8 is inserted into the installation tube 4, the extrusion rod 26 squeezes the valve plate 24 to make it rise, thereby connecting the hollow cavity 801 with the liquid inlet cavity 403, thereby achieving the closure and conduction of the hollow cavity 801 of the plug-in rod 8 to avoid leakage of the cutting fluid. At the same time, the circumferentially distributed jet cavity 404 has a better infiltration and flushing effect on the drill bit 5.

[0055] Second implementation method:

[0056] Figure 4 , Fig.12 and Fig.13 A drilling device for the side arm frame of a road roller is shown. Based on the first embodiment, a grinding head 6 is fixedly connected to one of the mounting tubes 4. The grinding head 6 includes a mounting column 28 fixedly connected to the mounting tube 4 by bolts. A plurality of circumferentially distributed grinding strips 29 slidably connected thereto are clamped on the upper end of the mounting column 28. A guide rod 30 passes through the lower part of the grinding strip 29. The guide rod 30 is sleeved with a coil spring 31 that abuts against the inner side of the grinding strip 29.

[0057] Specifically, by providing the coil spring 31, the grinding strips 29 are moved toward each other when squeezed, thereby adapting to drilling and grinding of holes with different diameters, having good adaptability, and improving the quality of the drilling operation.

[0058] See also Fig.13 The upper end of the mounting column 28 is provided with a disc integrally formed therewith, and the disc is provided with a plurality of radial grooves 2801 cooperating with the grinding strip 29. Both the guide rod 30 and the coil spring 31 are installed in the radial groove 2801. The grinding strip 29 is a strip-shaped structure with a pointed upper end and an arc-shaped outer end surface.

[0059] Specifically, it is convenient for the grinding strip 29 to be inserted into the drill hole and to have a good contact effect with the inner wall of the drill hole, thereby improving the grinding effect.

[0060] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A punching device for the side arm frame of a road roller, It is characterized in that The invention comprises a punching mechanism fixedly connected to an external mechanical arm, the punching mechanism comprising a rotating cylinder (1), one end of the rotating cylinder (1) being rotatably connected to a fixed cover (2), the fixed cover (2) being fixedly connected to a fixed frame (3) fixedly connected to the front end of the external mechanical arm; the circumferential side wall of the rotating cylinder (1) is penetrated by mounting cylinders (4) which are equidistantly distributed on the circumference and rotatably connected to the rotating cylinder (1), the outer end of the mounting cylinder (4) being fixedly connected to a detachable drill bit (5), the inner end of the mounting cylinder (4) being plugged with a plug-in rod (8), the plug-in rod (8) being slidably sleeved with a prism cylinder (9), the prism cylinder (9) being rotatably connected to a mounting frame (10) fixedly connected to the fixed cover (2), the upper end of the prism cylinder (9) being connected to a transmission shaft (12) via a transmission gear set (11), the transmission shaft (12) being connected to an output shaft of a driving motor (13); The middle part of the plug-in rod (8) is sleeved with a sleeve (14) rotatably connected thereto, the sleeve (14) is fixedly connected to a lifting plate (15), and the lifting plate (15) is connected to an electric telescopic cylinder (16) fixedly connected to the mounting frame (10); a driving gear (17) is fixedly sleeved on the transmission shaft (12), the driving gear (17) is meshed with a ratchet gear (18), the ratchet gear (18) is fixedly connected to a worm (19) rotatably connected to the fixed cover (2), the worm (19) is meshed with a worm wheel (20), the worm wheel (20) is fixedly connected to a radial shaft (21), the outer end of the radial shaft (21) is fixedly connected to a driving gear (22), and the driving gear (22) is meshed with a passive gear ring (23) fixedly connected to the inner wall of the rotating cylinder (1); The installation tube (4) is provided with a liquid inlet chamber (403), the lower part of the liquid inlet chamber (403) is connected to a jet chamber (404) whose opening faces the drill bit (5), the plug-in rod (8) is provided with a hollow chamber (801) connected to the liquid inlet chamber (403), the hollow chamber (801) is connected to the inner chamber of the sleeve (14) through a connecting hole provided on the side wall of the plug-in rod (8), the outer end of the sleeve (14) is connected to a liquid inlet pipe (27), and the liquid inlet pipe (27) is connected to an external cutting fluid delivery pump; The lower end of the plug rod (8) is pointed and provided with plug strips (802) distributed in a circle, the transverse cross section of the plug strip (802) is a right-angled trapezoid with the tip facing downward, the outer edge of the plug strip (802) is a rounded surface, the upper end of the installation cylinder (4) is provided with a plug cavity (401) that cooperates with the lower end of the plug rod (8), and the prism cylinder (9) is provided with a prism cavity for the plug rod (8) to slide vertically, and the cross section of the prism cavity is a regular polygon; A valve plate (24) for sealing the lower opening is provided at the lower opening of the hollow cavity (801); a spring telescopic rod (25) is fixedly connected to the upper end of the valve plate (24); the spring telescopic rod (25) is fixedly connected to a fixed plate fixedly connected to the inner wall of the hollow cavity (801); and an extrusion rod (26) cooperating with the valve plate (24) is provided in the liquid inlet cavity (403).

2. A punching device for a side arm frame of a road roller according to claim 1, It is characterized in that A grinding head (6) is fixedly connected to one of the mounting tubes (4), the grinding head (6) comprising a mounting column (28) fixedly connected to the mounting tube (4) by means of bolts, a plurality of circumferentially distributed grinding strips (29) slidably connected thereto are clamped on the upper end of the mounting column (28), a guide rod (30) passes through the lower part of the grinding strip (29), and the guide rod (30) is sleeved with a coil spring (31) abutting against the inner side of the grinding strip (29).

3. The punching device for the side arm frame of a road roller according to claim 1, It is characterized in that The rotating cylinder (1) is a horizontally arranged cylindrical structure; the mounting cylinder (4) is rotatably connected to the circumferential side wall of the rotating cylinder (1) via a bearing; the drill bit (5) is fixedly connected to the mounting cylinder (4) via a fixing bolt (7); and the mounting cylinder (4) is provided with a mounting hole (402) for mounting the drill bit (5).

4. The punching device for the side arm frame of a road roller according to claim 1, It is characterized in that The ratchet gear (18) comprises a gear ring (1801) meshing with the driving gear (17) and a ratchet plate (1802) nested in the gear ring (1801) and fixedly connected to the radial shaft (21).

5. The punching device for the side arm frame of a road roller according to claim 2, It is characterized in that The upper end of the mounting column (28) is provided with a disc integrally formed therewith, and the disc is provided with a plurality of radial grooves (2801) cooperating with the grinding strip (29), and both the guide rod (30) and the spiral spring (31) are installed in the radial grooves (2801), and the grinding strip (29) is a strip-shaped structure with a pointed upper end and an arc-shaped outer end surface.

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