Waste stone crushing and impact device and crushing method for municipal road repair

Abstract

The present invention relates to the technical field of crushing and impacting waste stones for repairing municipal roads, and discloses a crushing and impacting device for crushing waste stones for repairing municipal roads and a crushing method, comprising a protective box body, a top of the protective box body being provided with a feed port, a side bottom of the protective box body being provided with a discharge port, and a front side of the protective box body being fixedly connected with a support base. The present invention arranges a rotary crushing mechanism, and when the output shaft rotates, it drives the crushing column on the limit plate to rotate, and when the crushing column rotates, the extrusion semicircular blocks at both ends of the crushing column will squeeze the extrusion blocks on the side circular plate, and the crushing column moves longitudinally under the action of mutual extrusion, and at this time, the longitudinal movement of the crushing column drives the crushing pieces to move back and forth longitudinally, and the crushing pieces that move back and forth during the crushing process can crush the stones more fully, and when larger stones are generated to jam the crushing pieces, the moving crushing pieces can get rid of the blockage of the larger stones, thereby avoiding the rotary crushing mechanism being jammed by large stones.

Description

Technical Field

[0001] The present invention relates to the technical field of waste stone crushing and impact equipment for municipal road repair, and in particular to a waste stone crushing and impact device and a crushing method for municipal road repair. Background Art

[0002] There are many ways to crush and impact waste rocks in municipal road repairs. Common methods include: manual impact crushing: using tools such as hammers to manually strike waste rocks, breaking them into small pieces suitable for filling road cracks or potholes. This method is simple and easy to use, but requires a certain amount of physical strength and patience. Mechanical impact crushing: using mechanical equipment such as vibrating hammers and impact hammers to impact waste rocks, breaking them into suitable sizes. This method is highly efficient, but requires appropriate machinery and operating skills. Crusher crushing: using specialized crushing machinery such as crushers and jaw crushers to crush waste rocks. This method is suitable for large-scale crushing operations and has high processing efficiency.

[0003] At present, most of the waste stone crushing and impact devices used for municipal road repair are crushers. However, the crushing blades of the waste stone crushing and impact devices used for municipal road repair under the existing technology can only be rotated for crushing. It is easy to get stuck in the process of rotating crushing. Since most of the road construction stones are concrete blocks, it is easy to cause the crushing blades to break if they are not cleaned in time. Summary of the Invention

[0004] The object of the present invention is to provide a waste stone crushing and impacting device and a crushing method for municipal road repair, so as to solve the problems raised in the above-mentioned background technology.

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a waste stone crushing and impact device for municipal road repair, comprising a protective box body, a feed port being provided at the top of the protective box body, a discharge port being provided at the side bottom of the protective box body, a support base being fixedly connected to the front of the protective box body, a drive motor being fixedly connected to the top of the support base, an output end of the drive motor being fixedly connected to an output shaft, an end of the output shaft close to the drive motor being transmission-connected to a drive belt, a plurality of support legs being fixedly connected to the bottom of the protective box body, and further comprising:

[0007] The preliminary crushing mechanism includes several connecting plates fixedly connected to the inner wall of the protection box, and one end of the connecting plate away from the inner wall of the protection box is fixedly connected to a static crushing plate, which is arranged just below the feed port.

[0008] Furthermore, the preliminary crushing mechanism further comprises a crushing shaft fixedly connected to the inner wall of the protective box, and a crushing bottom plate is rotatably connected directly below the crushing shaft;

[0009] Among them, the side of the crushing bottom plate close to the static crushing plate is fixedly connected with the dynamic crushing plate, the dynamic crushing plate and the static crushing plate are arranged correspondingly, and the end of the crushing bottom plate away from the crushing shaft is fixedly connected with the extrusion bar.

[0010] Furthermore, the preliminary crushing mechanism also includes a rotating column that is transmission-connected to the top of the transmission belt, and a plurality of toggle blocks are fixedly connected to the rotating column, and the toggle blocks contact the crushing bottom plate when rotating.

[0011] Furthermore, a rotary crushing mechanism is provided directly below the primary crushing mechanism, and the rotary crushing mechanism includes several limit plates fixedly connected to the output rotating shaft, and several crushing columns are slidably passed through the edges of the limit plates, and several grooves are provided on the crushing columns. Two limit rings are slidably connected in the grooves of the crushing columns, and crushing pieces are rotatably connected to the limit rings, and a compression spring is fixedly connected to the limit rings.

[0012] Furthermore, a pushing mechanism is provided inside the protective box, and the pushing mechanism includes a side circular plate rotatably connected to both ends of the output shaft, a limiting hole is provided on the side of the side circular plate close to the driving motor, and a pushing block is fixedly connected to the side of the side circular plate close to the inner wall of the protective box, and the inner wall of the protective box corresponding to the pushing block is fixedly connected to the limiting frame.

[0013] Furthermore, the pushing mechanism also includes a spring sheet fixedly connected to the bottom of the pushing block, and a plurality of squeezing blocks are fixedly connected to the side of the side circular plate away from the protective box body;

[0014] Among them, the extrusion blocks on the two side circular plates are not symmetrically arranged. The two ends of the crushing column are fixedly connected with extrusion semicircular blocks. The bottom of the side circular plate is fixedly connected with an arc-shaped screen plate. There are several sieve holes on the arc-shaped screen plate. The arc-shaped screen plate does not collide with the rotating crushing pieces.

[0015] Furthermore, an auxiliary mechanism is provided directly below the rotary crushing mechanism, and the auxiliary mechanism includes a push rod fixedly connected to the side circular plate close to the inner wall of the protective box, and a plurality of semi-cylindrical protrusions are provided on the push rod, and the inner wall of the protective box is rotatably connected to the discharge shaft;

[0016] Among them, a discharging plate is fixedly connected to the discharging shaft, vibration rods are fixedly connected to both sides of the discharging plate, a number of semi-cylindrical protrusions are provided on the vibration rods, and a vibration spring is fixedly connected to one end of the bottom of the discharging plate near the discharging port.

[0017] A waste stone crushing and impact device for municipal road repair includes the following steps:

[0018] S1: Initial crushing: first put the stones to be crushed into the feed port, and the initial crushing mechanism will crush the large stones.

[0019] S2: Secondary crushing: the initially crushed stones pass through the rotating crushing mechanism, and the crushing pieces on the crushing column rotate continuously to break up larger stones;

[0020] S3: Pushing to prevent blocking, the crushing bottom plate moves to squeeze the side circular plate to move periodically, driving the arc screen plate to vibrate up and down, prompting stones to pass through the arc screen plate;

[0021] S4: Auxiliary discharging, the movement of the side circular plate drives the push rod to move, and through the collision with the vibration rod, the discharging plate vibrates to assist in discharging.

[0022] The present invention has the following beneficial effects:

[0023] (1) The present invention sets a rotating crushing mechanism. When the output shaft rotates, it drives the crushing column on the limit plate to rotate. When the crushing column rotates, the extrusion semicircular blocks at both ends of the crushing column will squeeze the extrusion blocks on the side circular plate. Under the action of mutual extrusion, the crushing column moves longitudinally. At this time, the longitudinal movement of the crushing column drives the crushing piece to move back and forth longitudinally. During the crushing process, the crushing piece moving back and forth can crush the stone more fully. When a large stone is generated to jam the crushing piece, the moving crushing piece can get rid of the blockage of the large stone, avoiding the rotating crushing mechanism from being jammed by the large stone, so that the rotating crushing mechanism cannot work. The extrusion blocks on the two side circular plates are not symmetrically arranged. The purpose of such arrangement is to facilitate the extrusion blocks on the two side circular plates to be staggered when squeezing with the extrusion semicircular blocks, so as to avoid the extrusion conflict caused by the extrusion semicircular blocks at both ends of the crushing column squeezing the extrusion blocks at the same time.

[0024] (2) The present invention sets up a preliminary crushing mechanism, first starts the driving motor, the driving motor rotates to drive the output shaft to rotate, the output shaft rotates to drive the transmission belt to rotate, the transmission belt rotates to drive the toggle block on the rotating column to rotate, the toggle block rotates to squeeze the dynamic crushing plate on the crushing bottom plate to move inward to squeeze the dynamic crushing plate, the dynamic crushing plate cooperates with the static crushing plate to initially crush the large stones passing through the feed port into smaller stones and drop them into the rotating crushing mechanism; at this time, the output shaft rotates to drive the crushing pieces on the limit plate to rotate, under high-speed movement, due to the centrifugal force of the crushing pieces, the crushing pieces open outward, at this time the contact area between the crushing pieces and the stones is larger, and the crushing effect is also better.

[0025] (3) In the present invention, when the crushing bottom plate moves around the crushing shaft, the extrusion strips on the crushing bottom plate squeeze the side circular plate, and the push blocks on the side circular plate squeeze the spring sheet along the limit frame. Under the back-and-forth squeezing of the crushing bottom plate, the side circular plate also vibrates up and down regularly. The up and down vibration of the side circular plate drives the arc screen plate to vibrate up and down. This arrangement is conducive to promoting the arc screen plate to screen out stones that meet the specifications more quickly, and avoids excessive stones from accumulating inside the arc screen plate, causing the arc screen plate to be blocked.

[0026] (4) The fallen stones of the present invention will be discharged through the discharge plate. Driven by the side circular plate, the push rod moves downward to squeeze the vibration rod, generating vibration during the squeezing process, thereby causing the discharge plate to vibrate, which helps the discharge plate to discharge materials more smoothly and avoids excessive accumulation of stones on the discharge plate.

[0027] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0031] Figure 3 This is a schematic diagram of the overall structure of the preliminary crushing mechanism of the present invention;

[0032] Figure 4 This is a schematic diagram of the overall structure of the rotary crushing mechanism of the present invention;

[0033] Figure 5 For the present invention Figure 4 A magnified view of middle A;

[0034] Figure 6 For the present invention Figure 4 Enlarged view of middle B;

[0035] Figure 7 This is a schematic diagram of the partial structure of the propulsion mechanism of the present invention;

[0036] Figure 8 It is a schematic diagram of the local structure of the present invention;

[0037] Figure 9 Schematic diagram of the crushing method of the present invention;

[0038] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0039] Figure: 1. Protective box; 11. Feed port; 12. Discharge port; 13. Support base; 14. Drive motor; 15. Output shaft; 16. Drive belt; 17. Support legs; 2. Preliminary crushing mechanism; 201. Connecting plate; 202. Static crushing plate; 203. Crushing shaft; 204. Crushing bottom plate; 205. Dynamic crushing plate; 206. Extrusion bar; 207. Rotating column; 208. Toggle block; 3. Rotating crushing mechanism; 301. Limiting plate ; 302, crushing column; 303, limiting ring; 304, crushing piece; 305, compression spring; 4, pushing mechanism; 401, side circular plate; 402, limiting hole; 403, pushing block; 404, limiting frame; 405, spring sheet; 406, extrusion block; 407, extrusion semicircular block; 408, arc-shaped screen plate; 5, auxiliary mechanism; 501, pushing rod; 502, discharging shaft; 503, discharging plate; 504, vibration rod; 505, vibration spring. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] Example 1

[0042] See also Figure 1-Figure 5 As shown, the present invention is a waste stone crushing and impact device for municipal road repair, including a protective box body 1, a feeding port 11 is provided on the top of the protective box body 1, and the purpose of such a setting is to facilitate the entry of the raw materials to be crushed, and a discharging port 12 is provided on the side bottom of the protective box body 1, and the purpose of such a setting is to facilitate the discharge of the crushed stones, and the front of the protective box body 1 is fixedly connected to a support base 13, and the purpose of such a setting is to facilitate the fixed connection of the drive motor 14, and the top of the support base 13 is fixedly connected to the drive motor 14, and the purpose of such a setting is to facilitate the provision of external power, and the output end of the drive motor 14 is fixedly connected to an output shaft 15, and the purpose of such a setting is to facilitate the rotation effect of the drive motor 14, and the output shaft 15 is connected to a transmission belt 16 at one end close to the drive motor 14, and the purpose of such a setting is to facilitate the rotation effect of the output shaft 15, and the bottom of the protective box body 1 is fixedly connected to a plurality of support legs 17, and the purpose of such a setting is to facilitate the support of the device, and also includes:

[0043] The preliminary crushing mechanism 2 includes several connecting plates 201 fixedly connected to the inner wall of the protective box body 1. The purpose of this arrangement is to facilitate the fixed connection of the static crushing plate 202. The end of the connecting plate 201 away from the inner wall of the protective box body 1 is fixedly connected with the static crushing plate 202. The purpose of this arrangement is to facilitate the cooperation with the dynamic crushing plate 205. The static crushing plate 202 is arranged directly below the feed port 11. The purpose of this arrangement is to facilitate the crushing of large stones.

[0044] The primary crushing mechanism 2 further comprises a crushing shaft 203 fixedly connected to the inner wall of the protective box 1. The purpose of such arrangement is to facilitate the rotational connection of the crushing bottom plate 204. The crushing bottom plate 204 is rotatably connected directly below the crushing shaft 203. The purpose of such arrangement is to facilitate the fixed connection of the movable crushing plate 205.

[0045] Among them, the side of the crushing bottom plate 204 close to the static crushing plate 202 is fixedly connected with a dynamic crushing plate 205. The purpose of this arrangement is to facilitate the crushing of large stones. The dynamic crushing plate 205 is arranged corresponding to the static crushing plate 202. The purpose of this arrangement is to facilitate the cooperation with the static crushing plate 202 to produce an extrusion effect. The end of the crushing bottom plate 204 away from the crushing shaft 203 is fixedly connected with an extrusion bar 206. The purpose of this arrangement is to facilitate the downward movement of the extruding side circular plate 401.

[0046] The preliminary crushing mechanism 2 also includes a rotating column 207 that is transmission-connected to the top of the transmission belt 16. The purpose of this arrangement is to facilitate the rotation effect of the connection transmission belt 16. A number of toggle blocks 208 are fixedly connected to the rotating column 207. The purpose of this arrangement is to facilitate squeezing the movable crushing plate 205 to move the movable crushing plate 205. When the toggle blocks 208 rotate, they contact the crushing bottom plate 204. The purpose of this arrangement is to facilitate squeezing the movable crushing plate 205.

[0047] A rotary crushing mechanism 3 is provided directly below the preliminary crushing mechanism 2. The purpose of this arrangement is to facilitate further crushing of stones. The rotary crushing mechanism 3 includes several limit plates 301 fixedly connected to the output rotating shaft 15. The purpose of this arrangement is to facilitate limiting the crushing column 302. The edge of the limit plate 301 slides through several crushing columns 302. The purpose of this arrangement is to facilitate the connection of crushing pieces 304. Several grooves are provided on the crushing column 302. The purpose of this arrangement is to facilitate the connection of crushing pieces 304. Two limit rings 303 are slidably connected in the grooves of the crushing column 302. The purpose of this arrangement is to facilitate the rotation of the crushing pieces 304. The crushing pieces 304 are rotatably connected to the limit ring 303. The purpose of this arrangement is to facilitate crushing large stones. A compression spring 305 is fixedly connected to the limit ring 303. The purpose of this arrangement is to facilitate the movement of the crushing pieces 304 along the crushing column 302.

[0048] Example 2

[0049] The difference from Example 1 is that:

[0050] like Figures 1-9 As shown, a pushing mechanism 4 is provided inside the protective box 1. The purpose of this setting is to facilitate the longitudinal movement of the crushing piece 304 to prevent the crushing piece 304 from being stuck in the stone. The pushing mechanism 4 includes a side circular plate 401 rotatably connected to the two ends of the output shaft 15. The purpose of this setting is to facilitate the movement effect of the connecting extrusion bar 206. A limiting hole 402 is provided on the side of the side circular plate 401 close to the drive motor 14. The purpose of this setting is to facilitate the side circular plate 401 to not collide with the output shaft 15 during movement. A pushing block 403 is fixedly connected to the side of the side circular plate 401 close to the inner wall of the protective box 1. The purpose of this setting is to facilitate the downward movement of the spring piece 405 squeezed by the pushing block 403. The inner wall of the protective box 1 corresponding to the pushing block 403 is fixedly connected to the limiting frame 404. The purpose of this setting is to facilitate the limiting spring piece 405.

[0051] The pushing mechanism 4 further includes a spring sheet 405 fixedly connected to the bottom of the pushing block 403. The purpose of such a configuration is to facilitate the resetting of the side circular plate 401. A plurality of squeezing blocks 406 are fixedly connected to the side of the side circular plate 401 away from the protective box 1. The purpose of such a configuration is to facilitate the squeezing effect produced by cooperating with the squeezing semicircular blocks 407.

[0052] Among them, the extrusion blocks 406 on the circular plates 401 on both sides are not symmetrically arranged. The purpose of this arrangement is to facilitate the extrusion blocks 406 on the circular plates 401 on both sides to be staggered when extruding with the extrusion semicircular blocks 407, so as to avoid the extrusion semicircular blocks 407 at both ends of the crushing column 302 extruding the extrusion blocks 406 at the same time to cause extrusion conflict. Both ends of the crushing column 302 are fixedly connected with the extrusion semicircular blocks 407. The purpose of this arrangement is to facilitate the cooperation with the extrusion blocks 406 to produce an extrusion effect to drive the crushing pieces 304 to move longitudinally. The bottom of the side circular plate 401 is fixedly connected with an arc-shaped screen plate 408. The purpose of this arrangement is to facilitate the screening of stones that meet the specifications. A number of sieve holes are provided on the arc-shaped screen plate 408. The arc-shaped screen plate 408 does not collide with the rotating crushing pieces 304. The purpose of this arrangement is to facilitate coordinated movement.

[0053] An auxiliary mechanism 5 is provided directly below the rotary crushing mechanism 3. The purpose of this arrangement is to facilitate auxiliary discharging and prevent stones from piling up on the discharging plate 503. The auxiliary mechanism 5 includes a push rod 501 fixedly connected to the side circular plate 401 close to the inner wall of the protective box 1. The purpose of this arrangement is to facilitate the movement effect of the side circular plate 401. The push rod 501 is provided with a number of semi-cylindrical protrusions. The inner wall of the protective box 1 is rotatably connected to the discharging shaft 502. The purpose of this arrangement is to facilitate the rotation connection of the discharging plate 503.

[0054] Among them, a discharge plate 503 is fixedly connected to the discharge shaft 502. The purpose of this arrangement is to facilitate the rotation of the discharge plate 503 around the discharge shaft 502. Vibration rods 504 are fixedly connected on both sides of the discharge plate 503. The purpose of this arrangement is to facilitate the cooperation with the push rod 501 to produce an extrusion effect. Several semi-cylindrical protrusions are provided on the vibration rod 504. The bottom of the discharge plate 503 is fixedly connected to one end near the discharge port 12 with a vibration spring 505. The purpose of this arrangement is to facilitate the reset of the discharge plate 503.

[0055] A waste stone crushing and impact device for municipal road repair includes the following steps:

[0056] S1: Initial crushing: first, the stones to be crushed are put in through the feed port 11, and the large stones are initially crushed by the initial crushing mechanism 2;

[0057] S2: Secondary crushing: the initially crushed stones pass through the rotating crushing mechanism 3, and the crushing pieces 304 on the crushing column 302 continuously rotate to break up larger stones;

[0058] S3: Pushing to prevent blocking, the crushing bottom plate 204 moves to squeeze the side circular plate 401 to move periodically, driving the arc-shaped screen plate 408 to vibrate up and down, forcing the stones to pass through the arc-shaped screen plate 408;

[0059] S4: Auxiliary discharging: the movement of the side circular plate 401 drives the push rod 501 to move, and by colliding with the vibration rod 504, the discharging plate 503 vibrates to assist in discharging.

[0060] A specific application of this embodiment is:

[0061] When the crushing and impact device for crushing waste stones for municipal road repair is used, a preliminary crushing mechanism 2 is set, and the driving motor 14 is first started. The driving motor 14 rotates to drive the output shaft 15 to rotate, and the output shaft 15 rotates to drive the transmission belt 16 to rotate. The transmission belt 16 rotates to drive the toggle block 208 on the rotating column 207 to rotate, and the toggle block 208 rotates to squeeze the dynamic crushing plate 205 on the crushing bottom plate 204 to move inward to squeeze the dynamic crushing plate 205. The dynamic crushing plate 205 cooperates with the static crushing plate 202 to initially crush the large stones passing through the feed port 11 into smaller stones and fall into the rotary crusher At this time, the output shaft 15 rotates to drive the crushing pieces 304 on the limit plate 301 to rotate. Under high-speed movement, the crushing pieces 304 are opened outward due to the centrifugal force of the crushing pieces 304. At this time, the contact area between the crushing pieces 304 and the stones is larger, and the crushing effect is better. At the same time, when the output shaft 15 rotates, the crushing column 302 on the limit plate 301 is driven to rotate. When the crushing column 302 rotates, the extrusion semicircular blocks 407 at both ends of the crushing column 302 squeeze the extrusion blocks 406 on the side circular plate 401. Under the action of mutual extrusion, the crushing column 302 produces longitudinal movement. At this time, the crushing column 302 02 The longitudinal movement drives the crushing piece 304 to move back and forth longitudinally. The crushing piece 304 that moves back and forth during the crushing process can crush the stones more fully. When a large stone is generated and blocks the crushing piece 304, the moving crushing piece 304 can get rid of the blockage of the large stone, thus preventing the rotating crushing mechanism 3 from being stuck by the large stone and being unable to work; when the crushing bottom plate 204 moves around the crushing shaft 203, the extrusion bar 206 on the crushing bottom plate 204 squeezes the side circular plate 401, and the pushing block 403 on the side circular plate 401 squeezes the spring piece 405 along the limit frame 404. Under the extrusion, the side circular plate 401 also vibrates up and down regularly. The up and down vibration of the side circular plate 401 drives the arc sieve plate 408 to vibrate up and down. This arrangement is conducive to promoting the arc sieve plate 408 to screen out stones that meet the specifications more quickly, and avoids excessive stones from accumulating inside the arc sieve plate 408, causing the arc sieve plate 408 to be blocked; the fallen stones will be discharged through the discharge plate 503, and the push rod 501 moves downward under the drive of the side circular plate 401 to squeeze the vibration rod 504, generating vibration during the extrusion process, thereby causing the discharge plate 503 to vibrate, which helps the discharge plate 503 to discharge materials more smoothly.

[0062] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A waste stone crushing and impact device for municipal road repair, comprising a protective box (1), a feed port (11) being provided on the top of the protective box (1), a discharge port (12) being provided on the side bottom of the protective box (1), a support base (13) being fixedly connected to the front of the protective box (1), a drive motor (14) being fixedly connected to the top of the support base (13), an output shaft (15) being fixedly connected to the output end of the drive motor (14), a drive belt (16) being transmission-connected to one end of the output shaft (15) close to the drive motor (14), and a plurality of support legs (17) being fixedly connected to the bottom of the protective box (1), characterized in that: Also includes: A preliminary crushing mechanism (2), the preliminary crushing mechanism (2) comprising a plurality of connecting plates (201) fixedly connected to the inner wall of the protective box (1), one end of the connecting plate (201) away from the inner wall of the protective box (1) being fixedly connected to a static crushing plate (202), the static crushing plate (202) being arranged directly below the feed port (11); A rotary crushing mechanism (3) is provided directly below the primary crushing mechanism (2), the rotary crushing mechanism (3) comprising a plurality of limit plates (301) fixedly connected to the output shaft (15), and a plurality of crushing columns (302) slidingly passing through the edges of the limit plates (301); A pushing mechanism (4) is provided inside the protection box (1), the pushing mechanism (4) comprising a side circular plate (401) rotatably connected to both ends of the output shaft (15), a limiting hole (402) being provided on a side of the side circular plate (401) close to the drive motor (14), a pushing block (403) being fixedly connected to a side of the side circular plate (401) close to the inner wall of the protection box (1), and a limiting frame (404) being fixedly connected to the inner wall of the protection box (1) corresponding to the pushing block (403); The pushing mechanism (4) further comprises a spring sheet (405) fixedly connected to the bottom of the pushing block (403); a plurality of extrusion blocks (406) are fixedly connected to the side of the side circular plate (401) away from the protective box (1); The extrusion blocks (406) on the two side circular plates (401) are not symmetrically arranged, and both ends of the crushing column (302) are fixedly connected with extrusion semicircular blocks (407). The bottom of the side circular plate (401) is fixedly connected with an arc-shaped screen plate (408), and the arc-shaped screen plate (408) is provided with a plurality of screen holes. The arc-shaped screen plate (408) does not collide with the rotating crushing piece (304).

2. The waste stone crushing and impact device for municipal road repair according to claim 1, characterized in that: The preliminary crushing mechanism (2) further comprises a crushing shaft (203) fixedly connected to the inner wall of the protective box (1), and a crushing bottom plate (204) is rotatably connected directly below the crushing shaft (203); The side of the crushing bottom plate (204) close to the static crushing plate (202) is fixedly connected to a dynamic crushing plate (205), the dynamic crushing plate (205) is arranged corresponding to the static crushing plate (202), and the end of the crushing bottom plate (204) away from the crushing shaft (203) is fixedly connected to an extrusion bar (206).

3. The waste stone crushing and impact device for municipal road repair according to claim 2, characterized in that: The preliminary crushing mechanism (2) further comprises a rotating column (207) which is connected to the top of the driving belt (16). A plurality of toggle blocks (208) are fixedly connected to the rotating column (207). When the toggle blocks (208) rotate, they contact the crushing bottom plate (204).

4. The waste stone crushing and impact device for municipal road repair according to claim 3, characterized in that: The crushing column (302) is provided with a plurality of grooves, two limiting rings (303) are slidably connected in the grooves of the crushing column (302), a crushing piece (304) is rotatably connected to the limiting ring (303), and a compression spring (305) is fixedly connected to the limiting ring (303).

5. The waste stone crushing and impact device for municipal road repair according to claim 4, characterized in that: An auxiliary mechanism (5) is provided directly below the rotary crushing mechanism (3), the auxiliary mechanism (5) comprising a push rod (501) fixedly connected to the side circular plate (401) close to the inner wall of the protective box (1), the push rod (501) being provided with a plurality of semi-cylindrical protrusions, and a discharging shaft (502) being rotatably connected to the inner wall of the protective box (1); A discharge plate (503) is fixedly connected to the discharge shaft (502), vibration rods (504) are fixedly connected to both sides of the discharge plate (503), a plurality of semi-cylindrical protrusions are provided on the vibration rods (504), and a vibration spring (505) is fixedly connected to one end of the bottom of the discharge plate (503) near the discharge port (12).

6. A method for crushing waste stones for municipal road repair, using the device for crushing and impacting waste stones for municipal road repair as claimed in claim 5, characterized in that: It includes the following steps: S1: Initial crushing: first, the stones to be crushed are put in through the feed port (11), and the large stones are initially crushed by the initial crushing mechanism (2); S2: Secondary crushing: the initially crushed stones pass through the rotating crushing mechanism (3), and the crushing pieces (304) on the crushing column (302) continuously rotate to break up larger stones; S3: Pushing to prevent blocking, the crushing bottom plate (204) moves to squeeze the side circular plate (401) to move periodically, driving the arc sieve plate (408) to vibrate up and down, prompting stones to pass through the arc sieve plate (408); S4: Assisted discharging: the side circular plate (401) moves to drive the push rod (501) to move, and the discharging plate (503) vibrates to assist in discharging by colliding with the vibration rod (504).

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