A punching device for installing highway guardrail

Abstract

The present invention discloses a punching device for installing a highway guardrail, and relates to the technical field of road construction. The present invention comprises a placing cylinder, the bottom of which is evenly provided with notches, and a downward pointed protrusion is fixed at the bottom of the placing cylinder, a limiting assembly is arranged at the periphery of the bottom of the placing cylinder, a mounting ring is arranged at the bottom of the limiting assembly, and the limiting assembly is used to control the lifting and moving of the mounting ring, a universal wheel is evenly fixedly installed at the bottom of the mounting ring, a threaded sleeve is fixedly installed at the center of the top of the inside of the placing cylinder, a rotating cylinder is movably connected inside the threaded sleeve, and a lifting column is slidably connected inside the rotating cylinder. The present invention can achieve stable positioning and easy movement, and is convenient and quick to operate, realizes consistency of drilling depth, and is convenient for the subsequent installation of guardrails. At the same time, the drilling depth can be uniformly adjusted to perform uniform drilling of different depths, thereby improving the practicality of use.

Description

Technical Field

[0001] The invention relates to the technical field of road construction, and in particular to a punching device for installing a highway guardrail. Background Art

[0002] During road construction, when the highway is paved, guardrails need to be installed between the opposite lanes to block the lights and provide safety protection for passing vehicles. During the guardrail installation process, it is necessary to first drill holes at intervals in the center of the highway to facilitate the installation of the guardrail.

[0003] The existing punching device for installing highway guardrails still has the following defects during use:

[0004] 1. Since the guardrail of the entire road is installed, it is necessary to punch holes multiple times along the center of the road. The existing handheld punching device is laborious to use and move, which reduces the efficiency of punching. Some mobile punching devices cannot be stably positioned during punching, and are prone to shaking during the punching process. It is impossible to simultaneously meet the requirements of stable positioning and easy movement, and the switching operation of positioning and movement is cumbersome;

[0005] 2. During the installation of the guardrail, it is necessary to install the columns in the drilled holes, and then install the horizontal guardrail. Therefore, in order to facilitate the installation of the guardrail, the columns need to maintain the same height, so the depth of the holes needs to be kept consistent. However, the existing punching device cannot accurately control the depth of the holes during the punching process, and it is not convenient to uniformly adjust the depth of the holes according to different requirements. Summary of the invention

[0006] The purpose of the present invention is to solve the problems that the above-mentioned existing punching devices are laborious to operate, cannot simultaneously meet the requirements of stable positioning and easy movement, the switching operation of positioning and movement is cumbersome, and the depth of the holes cannot be accurately controlled during the punching process, and it is not convenient to uniformly adjust the depth of the holes according to different requirements. The present invention provides a punching device for installing highway guardrails.

[0007] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0008] A punching device for installing a highway guardrail comprises a placing cylinder, the bottom of the placing cylinder is evenly provided with notches, and the bottom end of the placing cylinder is fixed with a downward pointed protrusion, a limiting assembly is arranged on the periphery of the bottom of the placing cylinder, a mounting ring is arranged on the bottom end of the limiting assembly, the limiting assembly is used to control the lifting and lowering movement of the mounting ring, a universal wheel is evenly fixedly installed on the bottom end of the mounting ring, a threaded sleeve is fixedly installed on the center of the top of the placing cylinder, a rotating cylinder is movably connected inside the threaded sleeve, a lifting column is slidably connected inside the rotating cylinder, a connecting ring is fixedly connected to the periphery of the top of the lifting column, and the connecting ring is located inside the rotating cylinder, a spring is arranged between the bottom end of the connecting ring and the inner wall of the bottom of the rotating cylinder, a body is fixedly installed on the bottom end of the lifting column, a drill bit is transmission-connected to the bottom of the body, a depth trigger assembly is arranged between the periphery of the body and the placing cylinder, and the depth trigger assembly is used to release the limiting control of the limiting assembly according to the descending depth.

[0009] Furthermore, a handle 1 is fixedly installed on the periphery of the top of the placing tube, and a handle 2 is fixedly installed on the periphery of the top of the lifting column. The handle 1 and the handle 2 are used to press the placing tube and the lifting column downwards respectively.

[0010] Furthermore, a handle is fixedly installed on the periphery of the top of the rotating drum, and the handle is used to drive the rotation of the rotating drum. An external thread is opened on the periphery of the middle part of the rotating drum, and the external thread is engaged with the threaded sleeve. Therefore, when the rotating drum is driven to rotate by the handle, the rotating drum can also be raised and lowered.

[0011] Furthermore, the spring is wrapped around the periphery of the lifting column, and the top end of the spring is fixedly connected to the connecting ring, and the bottom end is connected to the inner wall of the bottom of the rotating drum for limited rotation, so that when the rotating drum is rotating and lifting, the lifting column can be lifted and lowered synchronously without driving the lifting column to rotate.

[0012] Furthermore, the limit assembly includes a fixed cylinder, a fixed cylinder is evenly fixedly installed on the periphery of the bottom of the placing cylinder, the opening of the fixed cylinder faces downward, the internal limit sliding connection of the fixed cylinder is connected to a telescopic rod, the telescopic rod extends downward, a spring 2 is fixedly connected between the top of the telescopic rod and the inner wall of the top of the fixed cylinder, a side of the top of the telescopic rod close to the periphery of the placing cylinder is limit slidingly connected to a limit seat, a spring 3 is fixedly connected between an end of the limit seat away from the periphery of the placing cylinder and the inner wall of the outer side of the telescopic rod, a telescopic groove is provided on the lower side of the side of the placing cylinder close to the fixed cylinder, and the limit seat can be retracted when it moves upward in the telescopic groove, and a limit groove is provided above the telescopic groove on the periphery of the placing cylinder, and the limit groove passes through the outer wall of the placing cylinder, and when the limit seat enters the limit groove, the limit seat and the telescopic rod can be limited downward.

[0013] Furthermore, the bottom end of the telescopic rod is fixedly mounted to the top end of the mounting ring, so that during the lifting and lowering movement of the telescopic rod, the mounting ring can also be driven to lift and move.

[0014] Furthermore, a downwardly inclined groove is provided on the side of the top of the limit seat close to the placing tube, and the limit seat is aligned with the telescopic slot and the limit slot, and the width of the telescopic slot and the limit slot is greater than the width of the limit seat, so that during the upward movement of the telescopic rod, the limit seat can move up into the telescopic slot and finally move up into the limit slot.

[0015] The cam is provided with a plurality of locking plates, the locking plates having the plurality of locking plates being respectively provided with a plurality of locking plates and a plurality of locking plates for locking the cam.

[0016] Furthermore, the inner end of the transmission rod is hinged to slide seat 1, the outer end of the transmission rod is hinged to slide seat 2, and the transmission rod is inclined downward from the inside to the outside. Therefore, when slide seat 1 moves up to contact with the limit ring, the machine body continues to move downward, and the transmission rod can move slide seat 2 outward.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The present invention facilitates the driving of the machine body and the drill bit to move up and down to drill holes by supporting the threaded sleeve with the placement tube. At the same time, the design of the limit assembly and the depth trigger assembly enables the placement tube to stably contact the road surface and be stably positioned when drilling holes. After the drilling is completed, the mounting ring and the universal wheel will automatically pop up downward, thereby propping up the placement tube for easy transfer, thereby improving the efficiency of drilling holes, achieving stable positioning and easy movement, and convenient and quick operation.

[0019] 2. The present invention, through the coordinated design of the limit assembly and the depth trigger assembly, will prop up the placement tube to end the drilling after the drilling is moved down to a certain depth, thereby achieving consistency in the drilling depth, facilitating the subsequent installation of the guardrail, and at the same time being able to uniformly adjust the drilling depth to perform unified drilling of different depths, thereby improving practicality of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ;

[0021] Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure 2 ;

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention in a three-dimensional cutaway view;

[0023] Figure 4 It is a schematic diagram of a three-dimensional partial cross-sectional three-dimensional structure of the present invention;

[0024] Figure 5 The present invention Figure 4 A magnified view of the structure at center;

[0025] Figure 6 This is a schematic diagram of the internal three-dimensional structure of the placement tube of the present invention;

[0026] Figure 7 It is a schematic diagram of the three-dimensional structure of the interior of the placing tube of the present invention;

[0027] Figure 8 It is a schematic diagram of a partial cross-section of the body of the present invention.

[0028] Figure numerals: 1. placing cylinder; 1a. handle one; 2. limiting assembly; 21. fixing cylinder; 22. telescopic rod; 23. spring two; 24. limiting seat; 25. spring three; 26. telescopic slot; 27. limiting slot; 3. mounting ring; 4. universal wheel; 5. threaded sleeve; 6. rotating cylinder; 6a. turning handle; 61. external thread; 7. lifting column; 7a. handle two; 8. connecting ring; 9. spring one; 10. machine body; 11. drill bit; 12. depth trigger assembly; 121. slide slot; 122. slide one; 123. slide two; 124. transmission rod; 125. spring four; 126. push plate; 127. limiting ring; 128. tightening knob. DETAILED DESCRIPTION

[0029] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0030] A punching device for installing a highway guardrail according to a preferred embodiment of the present invention will be described in detail below. Figure 1-4As shown in Figure 7, a punching device for installing a highway guardrail comprises a placing cylinder 1, the bottom of the placing cylinder 1 is evenly provided with notches, and a downward pointed protrusion is fixed at the bottom end of the placing cylinder 1, a limit assembly 2 is arranged on the periphery of the bottom of the placing cylinder 1, a mounting ring 3 is arranged on the bottom end of the limit assembly 2, the limit assembly 2 is used to control the lifting and moving of the mounting ring 3, a universal wheel 4 is evenly fixedly installed on the bottom end of the mounting ring 3, a threaded sleeve 5 is fixedly installed at the center of the top of the inner part of the placing cylinder 1, a rotating cylinder 6 is movably connected inside the threaded sleeve 5, a lifting column 7 is slidably connected inside the rotating cylinder 6, a connecting ring 8 is fixedly connected to the periphery of the top of the lifting column 7, and the connecting ring 8 is located inside the rotating cylinder 6, a spring 9 is arranged between the bottom end of the connecting ring 8 and the inner wall of the bottom of the rotating cylinder 6, a body 10 is fixedly installed on the bottom end of the lifting column 7, a drill bit 11 is transmission-connected to the bottom of the body 10, a depth trigger assembly 12 is arranged between the periphery of the body 10 and the placing cylinder 1, and the depth trigger assembly 12 is used to release the limit control of the limit assembly 2 according to the depth of descent.

[0031] A handle 1 a is fixedly installed on the periphery of the top of the placement tube 1, and a handle 2 7 a is fixedly installed on the periphery of the top of the lifting column 7. The handle 1 a and the handle 2 7 a are used to press the placement tube 1 and the lifting column 7 downwards respectively.

[0032] A handle 6a is fixedly installed on the periphery of the top of the rotating drum 6, and the handle 6a is used to drive the rotation of the rotating drum 6. An external thread 61 is provided on the periphery of the middle part of the rotating drum 6. The external thread 61 is engaged with the threaded sleeve 5. Therefore, when the rotating drum 6 is driven to rotate by the handle 6a, the rotating drum 6 can also be raised and lowered.

[0033] Spring 1 9 is wrapped around the periphery of the lifting column 7, and the top end of the spring 1 9 is fixedly connected to the connecting ring 8, and the bottom end is connected to the inner wall of the bottom of the rotating drum 6 for limited rotation, so that when the rotating drum 6 is rotating and lifting, the lifting column 7 can be lifted and lowered synchronously without driving the lifting column 7 to rotate.

[0034] When drilling is required, the placement tube 1 is moved to the area where drilling is required through the design of the universal wheel 4 at the bottom of the mounting ring 3, and the drill bit 11 inside the placement tube 1 is aligned with the drilling position, and then the placement tube 1 is pressed downward by the handle 1a to make the placement tube 1 move downward until it contacts the road surface. At the same time, the mounting ring 3 and the universal wheel 4 will move upward relative to the placement tube 1, and the mounting ring 3 and the universal wheel 4 will be limited downward by the limiting assembly 2, so that the placement tube 1 is stably in contact with the road surface, and the design of the protruding tip at the bottom of the placement tube 1 can ensure the stability of the placement tube 1 on the road surface.

[0035] Then, the drill bit 11 is driven to rotate through the machine body 10, and the lifting column 7 is pressed downward by the handle 2 7a to move downward, so that the lifting column 7 compresses the spring 1 9 and moves downward, thereby driving the drill bit 11 to move downward to complete the drilling. During the drilling process, the design of the notch at the bottom of the placement tube 1 is utilized to facilitate the discharge of the generated powder. After the hole is drilled downward to a certain depth, the limit of the limit assembly 2 is released through the design of the depth trigger assembly 12, so that the mounting ring 3 and the universal wheel 4 are ejected downward again, so that the placement tube 1 moves upward to end the drilling, and at the same time, the placement tube 1 is disengaged from the road surface, and the universal wheel 4 can continue to be used for movement.

[0036] By rotating the rotary drum 6 through the turning handle 6a, the initial height of the machine body 10 is adjusted by utilizing the cooperation between the outer thread 61 of the rotary drum 6 and the threaded sleeve 5, so as to facilitate the assembly of drill bits 11 of different lengths.

[0037] Furthermore, if Figure 3-5 As shown, the limiting assembly 2 includes a fixed cylinder 21, and the fixed cylinder 21 is evenly fixedly installed on the periphery of the bottom of the placing cylinder 1, and the fixed cylinder 21 opens downward, and the internal limiting sliding connection of the fixed cylinder 21 is connected to a telescopic rod 22, and the telescopic rod 22 extends downward, and a spring 23 is fixedly connected between the top of the telescopic rod 22 and the inner wall of the top of the fixed cylinder 21, and a limiting sliding connection is made to a limiting seat 24 on one side of the top of the telescopic rod 22 near the periphery of the placing cylinder 1, and a spring 3 25 is fixedly connected between the end of the limiting seat 24 away from the periphery of the placing cylinder 1 and the outer inner wall of the telescopic rod 22, and a telescopic groove 26 is provided on the lower side of the side of the placing cylinder 1 near the fixed cylinder 21, and when the limiting seat 24 moves upward in the telescopic groove 26, it can be retracted, and a limiting groove 27 is provided above the telescopic groove 26 on the periphery of the placing cylinder 1, and the limiting groove 27 runs through the outer wall of the placing cylinder 1, and when the limiting seat 24 enters the limiting groove 27, the limiting seat 24 and the telescopic rod 22 can be limited downward.

[0038] The bottom ends of the telescopic rods 22 are fixedly mounted to the top ends of the mounting rings 3, so that during the lifting and lowering movement of the telescopic rods 22, the mounting rings 3 can also be driven to be lifted and moved.

[0039] A downwardly inclined groove is provided on the top of the limit seat 24 near the side of the placement tube 1, and the limit seat 24 is aligned with the telescopic groove 26 and the limit groove 27, and the width of the telescopic groove 26 and the limit groove 27 is greater than the width of the limit seat 24, so that when the telescopic rod 22 moves upward, the limit seat 24 can move up into the telescopic groove 26 and finally move up into the limit groove 27.

[0040] The limiting principle of the limiting assembly 2 for the mounting ring 3 and the universal wheel 4 is as follows:

[0041] When the placement tube 1 is pressed downward to move the mounting ring 3 upward relative to the placement tube 1, the telescopic rod 22 can be pushed to compress the spring 2 23 upward to move, and when the inner limit seat 24 of the telescopic rod 22 moves into the telescopic groove 26, the telescopic rod 22 can compress the spring 3 25 to retract, and when the placement tube 1 moves to contact the road surface, the limit seat 24 can move upward to the limit groove 27, and the limit seat 24 is moved into the limit groove 27 by the restoring force of the spring 3 25 to limit the telescopic rod 22, and then limit the mounting ring 3 and the universal wheel 4, so that the mounting ring 3 and the universal wheel 4 will not pop up downward, so that the placement tube 1 can be stably contacted with the ground.

[0042] After the drilling is completed, the depth trigger assembly 12 can push the limit seat 24 outward from the limit groove 27, releasing the limit on the limit seat 24, so that the telescopic rod 22 pops up downward under the action of the restoring force of the spring 23, and then drives the mounting ring 3 and the universal wheel 4 to pop up downward, so as to prop up the placement tube 1 for easy movement, while also ensuring the consistency of the drilling depth.

[0043] Furthermore, if Figure 3-8 As shown, the depth trigger assembly 12 includes a slide groove 121. The outer periphery of the body 10 is evenly provided with slide grooves 121. The number of slide grooves 121 and the fixed cylinder 21 are the same and aligned with each other. The inner limit sliding connection of the slide groove 121 is connected with a slide seat 122. The lower limit sliding connection of the inner side of the inner limit groove 27 of the placement cylinder 1 is connected with a slide seat 23. A transmission rod 124 is connected between the slide seat 122 and the slide seat 2 123. A spring 4 125 is fixedly connected between one end of the outer side of the slide seat 2 123 and the inner wall of the placement cylinder 1. The outer side of the top of the slide seat 2 123 is connected with the spring 4 125. A push plate 126 is fixedly installed at one end, and the push plate 126 is located below the inside of the limit groove 27. When the push plate 126 moves outward, the limit seat 24 can be pushed outward from the limit groove 27. The outer sliding sleeve of the body 10 is provided with a limit ring 127, and the outer periphery of the limit ring 127 is threadedly connected with a tightening knob 128. The tightening knob 128 passes through the limit ring 127 and is used to fix the position of the limit ring 127. By adjusting the height of the limit ring 127, the slide seat 122 moves up to different heights in contact with the limit ring 127.

[0044] One inner end of the transmission rod 124 is hinged to the slide 122, and one outer end of the transmission rod 124 is hinged to the slide 2 123, and the transmission rod 124 is inclined downward from the inside to the outside. Therefore, when the slide 122 moves up to contact the limit ring 127, the body 10 continues to move downward, and the slide 2 123 can be moved outward through the action of the transmission rod 124.

[0045] The principle of the depth trigger assembly 12 pushing the limit seat 24 outward when the hole is drilled to a certain depth is as follows:

[0046] When the machine body 10 and the drill bit 11 are moved downward by the lifting column 7 for drilling, during the downward movement of the machine body 10, the slide 122 will move upward relative to the machine body 10 in the slide groove 121, and when the slide 122 moves up to contact with the limit ring 127, the machine body 10 continues to move downward, which will cause the transmission rod 124 to push the slide 2 123 to compress the spring 4 125 to move outward, thereby driving the push plate 126 to move outward in the limit groove 27, and after drilling to the moving depth, the limit seat 24 is pushed outward from the limit groove 27 to release the limit on the limit seat 24.

[0047] Through the design of the limit ring 127 and the tightening knob 128 on the outside of the body 10, the height of the limit ring 127 on the outside of the body 10 can be adjusted, so that the different heights of the downward movement can trigger the release of the limit of the limit seat 24, thereby realizing the adjustment of drilling holes of different depths.

[0048] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A punching device for installing a highway guardrail, comprising a placement cylinder (1), characterized in that: A limit assembly (2) is arranged on the periphery of the bottom of the placement cylinder (1), a mounting ring (3) is arranged on the bottom end of the limit assembly (2), the limit assembly (2) is used to control the lifting and lowering movement of the mounting ring (3), a universal wheel (4) is evenly fixedly installed on the bottom end of the mounting ring (3), a threaded sleeve (5) is fixedly installed at the center of the top of the interior of the placement cylinder (1), a rotating cylinder (6) is movably connected inside the threaded sleeve (5), a lifting column (7) is slidably connected inside the rotating cylinder (6), and the top of the lifting column (7) is fixedly mounted on the top of the rotating cylinder (6). A connecting ring (8) is fixedly connected to the periphery of the rotating cylinder (6), and the connecting ring (8) is located inside the rotating cylinder (6); a spring (9) is arranged between the bottom end of the connecting ring (8) and the inner wall of the bottom of the rotating cylinder (6); a body (10) is fixedly installed at the bottom end of the lifting column (7); a drill bit (11) is transmission-connected to the bottom of the body (10); a depth trigger component (12) is arranged between the periphery of the body (10) and the placement cylinder (1); the depth trigger component (12) is used to release the limit control of the limit component (2) according to the descending depth; The limiting assembly (2) comprises a fixed cylinder (21), the outer periphery of the bottom of the placement cylinder (1) is evenly fixedly installed with the fixed cylinder (21), the opening of the fixed cylinder (21) faces downward, the inner limiting sliding connection of the fixed cylinder (21) is a telescopic rod (22), the telescopic rod (22) extends downward, a second spring (23) is fixedly connected between the top of the telescopic rod (22) and the inner wall of the top of the fixed cylinder (21), a limiting sliding connection of a limiting seat (24) is made at one side of the top of the telescopic rod (22) close to the outer periphery of the placement cylinder (1), a third spring (25) is fixedly connected between the end of the limiting seat (24) away from the outer periphery of the placement cylinder (1) and the outer inner wall of the telescopic rod (22), a telescopic groove (26) is provided on the lower side of the side of the outer periphery of the placement cylinder (1) close to the fixed cylinder (21), a limiting groove (27) is provided above the telescopic groove (26) on the outer periphery of the placement cylinder (1), and the limiting groove (27) passes through the outer wall of the placement cylinder (1); The depth trigger assembly (12) comprises a slide groove (121). The outer periphery of the body (10) is evenly provided with the slide grooves (121). The number of the slide grooves (121) and the fixed cylinder (21) is the same and they are aligned with each other. The inner limit sliding connection of the slide groove (121) is connected to a slide seat 1 (122). The lower limit sliding connection of the inner side of the limit groove (27) inside the placement cylinder (1) is connected to a slide seat 2 (123). A transmission rod (124) is connected between the slide seat 1 (122) and the slide seat 2 (123). A spring four (125) is fixedly connected between the outer end of the slide seat (123) and the inner wall of the placement tube (1); a push plate (126) is fixedly installed at the outer end of the top of the slide seat (123); the push plate (126) is located below the inside of the limiting groove (27); the outer sliding sleeve of the body (10) is provided with a limiting ring (127); the outer periphery of the limiting ring (127) is threadedly connected with a tightening knob (128); the tightening knob (128) passes through the limiting ring (127) and is used to fix the position of the limiting ring (127).

2. The punching device for installing a highway guardrail according to claim 1, characterized in that: A handle 1 (1a) is fixedly mounted on the periphery of the top of the placement cylinder (1), and a handle 2 (7a) is fixedly mounted on the periphery of the top of the lifting column (7). The handle 1 (1a) and the handle 2 (7a) are respectively used to press the placement cylinder (1) and the lifting column (7) downwards.

3. The punching device for installing a highway guardrail according to claim 1, characterized in that: A turning handle (6a) is fixedly mounted on the periphery of the top of the rotating drum (6), and the turning handle (6a) is used to drive the rotating drum (6) to rotate. An external thread (61) is provided on the periphery of the middle part of the rotating drum (6), and the external thread (61) is meshed with the threaded sleeve (5).

4. The punching device for installing a highway guardrail according to claim 1, characterized in that: The spring one (9) is wrapped around the periphery of the lifting column (7), and the top end of the spring one (9) is fixedly connected to the connecting ring (8), and the bottom end is connected to the inner wall of the bottom of the rotating drum (6) in a limited rotational manner, so that when the rotating drum (6) is rotating and lifting, the lifting column (7) can be raised and lowered synchronously without driving the lifting column (7) to rotate.

5. The punching device for installing a highway guardrail according to claim 1, characterized in that: The bottom ends of the telescopic rods (22) are fixedly mounted to the top ends of the mounting rings (3).

6. The punching device for installing a highway guardrail according to claim 1, characterized in that: A groove inclined downward is provided on a side of the top of the limiting seat (24) close to the placement tube (1), and the limiting seat (24) is aligned with the telescopic groove (26) and the limiting groove (27), and the width of the telescopic groove (26) and the limiting groove (27) is greater than the width of the limiting seat (24).

7. The punching device for installing a highway guardrail according to claim 1, characterized in that: An inner end of the transmission rod (124) is hinged to the first slide seat (122), an outer end of the transmission rod (124) is hinged to the second slide seat (123), and the transmission rod (124) is inclined downward from the inside to the outside.

8. The punching device for installing a highway guardrail according to claim 1, characterized in that: The bottom of the placement tube (1) is evenly provided with notches, and a downward pointed protrusion is fixed at the bottom end of the placement tube (1).

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