Stone crushing device for municipal bridge construction

Abstract

The invention relates to the technical field of stone crushing, in particular to a municipal bridge construction stone crushing device which comprises a crushing box, a first crushing roller, a second crushing roller, a mounting box, a driving mechanism, an adjusting mechanism, a distance adjusting mechanism and a pressing mechanism. The top of the side wall of the crushing box communicates with a feeding hopper; the first crushing roller is rotationally arranged in the crushing box; the second crushing roller is movably arranged in the crushing box; two groups of mounting boxes are arranged; two groups of driving mechanisms are arranged; the number of the adjusting mechanisms is two. And the pressing mechanism is movably arranged in the crushing box. Through cooperative arrangement of the driving mechanism, the adjusting mechanism and the distance adjusting mechanism, the distance between the first crushing roller and the second crushing roller is conveniently adjusted, and through cooperative arrangement of the driving mechanism and the pressing mechanism, forced contact between materials and the first crushing roller and between the materials and the second crushing roller is promoted; and the situation that idling occurs between the materials and the first crushing roller and the second crushing roller, and crushing of the materials is affected is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of stone crushing, and particularly relates to a stone crushing device for municipal bridge construction. Background Art

[0002] In the prior art, stone crushing devices for municipal bridge construction are widely used in municipal bridge construction. During municipal bridge construction, various stones often need to be crushed into different sizes. In earthwork construction, it is required that the stones be crushed evenly and finely to facilitate various construction operations. Traditional stone crushing devices include jaw crushers, cone crushers, and impact crushers.

[0003] Chinese Patent with Publication No. CN218689914U discloses a stone crushing device for bridge and tunnel construction, belonging to the field of crushing devices, including: a crushing box; a crushing device provided on the crushing box; a feeding cylinder fixedly connected to the feeding port of the crushing box; a watering mechanism provided on the feeding cylinder; a dust-proof mechanism provided on the feeding cylinder; and a discharging hopper fixedly connected to the feeding port of the feeding cylinder. Through the setting of the spray pipe in the present invention, water spraying can be realized. By spraying water through the spray pipe, the generation of dust can be inhibited, so that dust-free operation can be achieved during the crushing process. Through the setting of the partition plate, the discharge of dust can be blocked, thereby realizing double protection to prevent the discharge of dust. By extending the electric telescopic rod, the fixed plate can be moved. By moving the fixed plate, the partition plate can be moved, which can solve the problem that the existing stone crushing device cannot inhibit the generation of dust during crushing, resulting in a large amount of dust generated during crushing.

[0004] However, the above technical solutions have the following deficiencies: Relying on the rotation of two parallel crushing rolls to crush materials. On the one hand, the distance between the two crushing rolls cannot be adjusted, and only single-size crushing of solid raw materials can be carried out, with a relatively small scope of application and it is difficult to meet the diverse material crushing requirements, and the overall practicality is poor. On the other hand, when using the crusher to crush materials, since the shapes of some materials tend to be circular, there may be a situation where the materials rotate idly on the surface of the crushing roll, which will in turn lead to the failure of crushing some materials and affect the crushing progress of the materials. Summary of the Invention

[0005] The object of the present invention is to propose a stone crushing device for municipal bridge construction in view of the problems in the background art.

[0006] The technical solution of the present invention: A stone crushing device for municipal bridge construction includes: A crushing box, the top of the side wall of which is communicated with a feeding hopper; A first crushing roll rotatably arranged in the crushing box, and the first crushing roll is rotatably connected to the crushing box through a first mounting shaft; The second crushing roller is movably arranged in the crushing box and is movably connected to the crushing box through a second mounting shaft; There are two sets of mounting boxes, which are respectively arranged on the front and back sides of the crushing box. Both ends of the first mounting shaft and the second mounting shaft penetrate through the crushing box and extend into the mounting boxes; There are two sets of driving mechanisms, which correspond to the mounting boxes one by one. The driving mechanisms are arranged in the mounting boxes, and the output ends of the driving mechanisms are respectively connected to the first mounting shaft and the second mounting shaft to drive the first crushing roller and the second crushing roller to rotate; There are two sets of adjusting mechanisms, which correspond to the mounting boxes one by one. The adjusting mechanisms are arranged in the mounting boxes, and one end of the adjusting mechanisms is connected to the second mounting shaft to adjust the distance between the first crushing roller and the second crushing roller; The distance adjusting mechanism is arranged on the crushing box and is in transmission connection with the adjusting mechanism; The pressing mechanism is movably arranged in the crushing box, is arranged above the first crushing roller and the second crushing roller, and is in transmission connection with the driving mechanism.

[0007] Preferably, the driving mechanism includes a movable box, a driving motor, a driving rod, a driving component and a transmission component; the movable box is slidably arranged in the mounting box, the driving motor is fixedly connected to the movable box, one end of the driving rod is connected to the driving motor, the other end of the driving rod penetrates through the movable box and is rotatably connected to the movable box, the driving component is arranged in the mounting box, one end of the driving component is connected to the driving rod, the other end of the driving component is connected to the second mounting shaft, one end of the transmission component is connected to the driving component, and the other end of the transmission component is connected to the first mounting shaft.

[0008] Preferably, the driving component includes an intermediate shaft, an intermediate sprocket, a driving sprocket, a driven sprocket and a transmission chain. The intermediate shaft is rotatably arranged in the mounting box, the intermediate sprocket is fixedly connected to the intermediate shaft, the driving sprocket is fixedly connected to the driving rod, the driven sprocket is fixedly connected to the second mounting shaft, and the driving sprocket is in transmission connection with the intermediate sprocket and the driven sprocket through the transmission chain.

[0009] Preferably, the transmission component includes an intermediate gear and a driven gear; the intermediate gear is fixedly connected to the intermediate shaft, the driven gear is fixedly connected to the first mounting shaft, and the intermediate gear is meshed with the driven gear.

[0010] Preferably, the adjusting mechanism includes an adjusting sleeve, an adjusting screw, bevel gears, a bevel gear ring and a linkage component; the adjusting sleeve is fixedly arranged in the movable box, the adjusting screw is in threaded connection with the adjusting sleeve, both ends of the adjusting screw penetrate through the movable box and extend to the outside of the movable box, the linkage component is arranged in the mounting box, one end of the linkage component is connected to the second mounting shaft, the bevel gear is fixedly connected to the adjusting screw, the bevel gear ring is connected to the linkage component, and the bevel gear is meshed with the bevel gear ring.

[0011] Preferably, the linkage assembly includes a linkage collar, a linkage sleeve, and a linkage screw; the linkage collar is sleeved on the second mounting shaft and rotatably connected to the second mounting shaft, the linkage collar is slidably connected to the mounting box, the linkage sleeve is fixedly connected to the linkage cylinder, one end of the linkage screw is threadedly connected to the linkage sleeve, and the other end of the linkage screw is fixedly connected to the bevel gear ring.

[0012] Preferably, the pressing mechanism includes a pressing plate, a crankshaft, and a rocker; the pressing plate is movably arranged in the crushing box, one end of the pressing plate is rotatably connected to the crushing box, there are multiple groups of crankshafts, the crankshafts are fixedly connected to the driving rods, there are multiple groups of rockers and they correspond to the crankshafts one by one, one end of the rocker is rotatably connected to the crankshaft, and the other end of the rocker is rotatably connected to the pressing plate.

[0013] Preferably, the distance adjusting mechanism includes a protective box, a distance adjusting rod, a distance adjusting worm gear, and a distance adjusting worm; the protective box is fixedly connected to the top of the crushing box, the top end of the adjusting screw penetrates through the mounting box and the protective box and extends into the protective box, one end of the distance adjusting rod is rotatably arranged in the protective box, there are two groups of distance adjusting worm gears and they correspond to the adjusting screw one by one, the distance adjusting worm gears are fixedly connected to the adjusting screw, there are two groups of distance adjusting worms and they correspond to the distance adjusting worm gears one by one, the distance adjusting worms are adapted to the distance adjusting worm gears, and the distance adjusting worms are fixedly connected to the distance adjusting rod.

[0014] Compared with the prior art, the above technical solutions of the present invention have the following beneficial technical effects: Through the cooperative setting among the driving mechanism, the adjusting mechanism, and the distance adjusting mechanism, by rotating the distance adjusting rod, the second crushing roller is driven to move through the adjusting mechanism to adjust the distance between the first crushing roller and the second crushing roller to the required size, meeting the diverse material crushing requirements, and the overall practicality is relatively strong. Through the cooperative setting between the driving mechanism and the pressing mechanism, the pressing plate swings to press the material towards between the first crushing roller and the second crushing roller, thereby promoting forced contact between the material and the first crushing roller and the second crushing roller, and avoiding idling between the material and the first crushing roller and the second crushing roller, which affects the crushing of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a perspective view of an embodiment proposed by the present invention; Figure 2 is a schematic structural diagram of the interior of the crushing box in an embodiment proposed by the present invention; Figure 3 is a schematic structural diagram of the adjusting mechanism in an embodiment proposed by the present invention; Figure 4 is a schematic structural diagram of the transmission assembly in an embodiment proposed by the present invention; Figure 5 is a schematic structural diagram of the interior of the mounting box in an embodiment proposed by the present invention; Figure 6 Schematic structural diagram of a driving mechanism in an embodiment proposed by the present invention; Figure 7 Schematic structural diagram of a linkage assembly in an embodiment proposed by the present invention; Figure 8 Schematic diagram of the internal structure of the crushing chamber from a second perspective in an embodiment proposed by the present invention; Figure 9 Schematic structural diagram of a pressing mechanism in an embodiment proposed by the present invention.

[0016] Reference numerals: 1, crushing chamber; 2, feed hopper; 31, movable box; 32, drive motor; 331, intermediate shaft; 332, intermediate sprocket; 333, driving sprocket; 334, driven sprocket; 335, drive chain; 341, intermediate gear; 342, driven gear; 35, drive rod; 41, adjusting sleeve; 42, adjusting screw; 43, bevel gear; 441, linkage collar; 442, linkage sleeve; 443, linkage screw; 45, bevel gear ring; 51, pressing plate; 52, crankshaft; 53, rocker; 61, protective box; 62, distance adjusting rod; 63, distance adjusting worm gear; 64, distance adjusting worm; 7, first crushing roller; 8, first mounting shaft; 9, second crushing roller; 10, second mounting shaft; 11, mounting box. Detailed implementation manners

[0017] Embodiment 1, as Figures 1-9 shown, a stone crushing device for municipal bridge construction proposed by the present invention includes a crushing chamber 1, a first crushing roller 7, a second crushing roller 9, a mounting box 11, a driving mechanism, an adjusting mechanism, a distance adjusting mechanism and a pressing mechanism; The top of the side wall of the crushing chamber 1 is communicated with a feed hopper 2, and the bottom of the crushing chamber 1 is provided with support legs and a discharge opening; The first crushing roller 7 is rotatably arranged in the crushing chamber 1, and the first crushing roller 7 is rotatably connected to the crushing chamber 1 through a first mounting shaft 8; The second crushing roller 9 is movably arranged in the crushing chamber 1, the second crushing roller 9 is movably connected to the crushing chamber 1 through a second mounting shaft 10, and the crushing chamber 1 is provided with a through hole for the second mounting shaft 10 to slide horizontally; There are two groups of mounting boxes 11, and the two groups of mounting boxes 11 are respectively arranged on the front and back of the crushing chamber 1. Both ends of the first mounting shaft 8 and the second mounting shaft 10 penetrate through the crushing chamber 1 and extend into the mounting box 11; There are two groups of driving mechanisms corresponding to the mounting boxes 11 one by one. The driving mechanisms are arranged in the mounting boxes 11, and the output ends of the driving mechanisms are respectively connected to the first mounting shaft 8 and the second mounting shaft 10 for driving the first crushing roller 7 and the second crushing roller 9 to rotate; There are two sets of adjusting mechanisms, which correspond to the installation boxes 11 one by one. The adjusting mechanisms are arranged in the installation boxes 11. One end of the adjusting mechanism is connected to the second installation shaft 10 for adjusting the distance between the first crushing roller 7 and the second crushing roller 9; The distance adjusting mechanism is arranged on the crushing box 1 and is in transmission connection with the adjusting mechanism; The pressing mechanism is movably arranged in the crushing box 1. The pressing mechanism is arranged above the first crushing roller 7 and the second crushing roller 9 and is in transmission connection with the driving mechanism.

[0018] Embodiment 2, as Figures 2-6 shown, a stone crushing device for municipal bridge construction proposed by the present invention. Compared with Embodiment 1, the structure of the driving mechanism is specifically disclosed in this embodiment; the driving mechanism includes a movable box 31, a driving motor 32, a driving rod 35, a driving component and a transmission component; the movable box 31 is slidably arranged in the installation box 11, the driving motor 32 is fixedly connected to the movable box 31, the driving motor 32 is a variable-frequency motor, and is connected to the control system and the power supply through wires. The two driving mechanisms on both sides share one driving motor 32. One end of the driving rod 35 is connected to the driving motor 32, the other end of the driving rod 35 penetrates through the movable box 31 and is rotatably connected to the movable box 31. The driving rod 35 penetrates through the crushing box 1, and the crushing box 1 is provided with a movable hole for the driving rod 35 to slide in the vertical direction. The driving component is arranged in the installation box 11, one end of the driving component is connected to the driving rod 35, the other end of the driving component is connected to the second installation shaft 10, one end of the transmission component is connected to the driving component, and the other end of the transmission component is connected to the first installation shaft 8.

[0019] Embodiment 3, as Figures 4-6 shown, a stone crushing device for municipal bridge construction proposed by the present invention. Compared with Embodiment 2, the structure of the driving component is specifically disclosed in this embodiment; the driving component includes an intermediate shaft 331, an intermediate sprocket 332, a driving sprocket 333, a driven sprocket 334 and a transmission chain 335. The intermediate shaft 331 is rotatably arranged in the installation box 11, one end of the intermediate shaft 331 is rotatably connected to the installation box 11, the other end of the intermediate shaft 331 is rotatably connected to the crushing box 1, the intermediate sprocket 332 is fixedly connected to the intermediate shaft 331, the driving sprocket 333 is fixedly connected to the driving rod 35, the driven sprocket 334 is fixedly connected to the second installation shaft 10, and the driving sprocket 333 is in transmission connection with the intermediate sprocket 332 and the driven sprocket 334 through the transmission chain 335.

[0020] Embodiment 4, as Figure 4As shown, a stone crushing device for municipal bridge construction proposed by the present invention, compared with Embodiment III, this embodiment also specifically discloses the structure of the transmission component; the transmission component includes an intermediate gear 341 and a driven gear 342; the intermediate gear 341 is fixedly connected to the intermediate shaft 331, the driven gear 342 is fixedly connected to the first mounting shaft 8, and the intermediate gear 341 meshes with the driven gear 342.

[0021] Embodiment V, as Figures 3-7 As shown, a stone crushing device for municipal bridge construction proposed by the present invention, compared with Embodiment IV, this embodiment also specifically discloses the structure of the adjustment mechanism; the adjustment mechanism includes an adjustment sleeve 41, an adjustment screw 42, a bevel gear 43, a bevel gear ring 45 and a linkage component; the adjustment sleeve 41 is fixedly arranged in the movable box 31, the adjustment screw 42 is threadedly connected to the adjustment sleeve 41, one end of the adjustment screw 42 is rotatably arranged in the mounting box 11, the other end of the adjustment screw 42 extends outside the mounting box 11, both ends of the adjustment screw 42 penetrate through the movable box 31 and extend to the outside of the movable box 31, the linkage component is arranged in the mounting box 11, one end of the linkage component is connected to the second mounting shaft 10, the bevel gear 43 is fixedly connected to the adjustment screw 42, the bevel gear ring 45 is connected to the linkage component, and the bevel gear 43 meshes with the bevel gear ring 45; the linkage component includes a linkage collar 441, a linkage sleeve 442 and a linkage screw 443; the linkage collar 441 is sleeved on the second mounting shaft 10 and is rotatably connected to the second mounting shaft 10, the linkage collar 441 is slidably connected to the mounting box 11, the linkage sleeve 442 is fixedly connected to the linkage cylinder, one end of the linkage screw 443 is threadedly connected to the linkage sleeve 442, and the other end of the linkage screw 443 is fixedly connected to the bevel gear ring 45.

[0022] Embodiment VI, as Figure 9 As shown, a stone crushing device for municipal bridge construction proposed by the present invention, compared with Embodiment V, this embodiment also specifically discloses the structure of the pressing mechanism; the pressing mechanism includes a pressing plate 51, a crankshaft 52 and a rocker 53; the pressing plate 51 is movably arranged in the crushing box 1, one end of the pressing plate 51 is rotatably connected to the crushing box 1, multiple groups of crankshafts 52 are provided, the crankshafts 52 are fixedly connected to the driving rod 35, multiple groups of rockers 53 are provided and correspond to the crankshafts 52 one by one, one end of the rocker 53 is rotatably connected to the crankshaft 52, and the other end of the rocker 53 is rotatably connected to the pressing plate 51.

[0023] Embodiment VII, as Figures 1-3As shown in the figure, a stone crushing device for municipal bridge construction proposed by the present invention specifically discloses the structure of the distance adjustment mechanism compared with Embodiment VI; the distance adjustment mechanism includes a protective box 61, a distance adjustment rod 62, a distance adjustment worm gear 63, and a distance adjustment worm 64; the protective box 61 is fixedly connected to the top of the crushing box 1, the top end of the adjusting screw 42 penetrates through the installation box 11 and the protective box 61 and extends into the protective box 61, one end of the distance adjustment rod 62 is rotatably arranged in the protective box 61, the other end of the distance adjustment rod 62 penetrates through the protective box 61 and extends to the outside of the protective box 61, and an adjusting hand wheel is fixedly connected to the end of the adjusting rod 62 located outside the protective box 61. There are two groups of distance adjustment worm gears 63 corresponding to the adjusting screw 42 one by one. The distance adjustment worm gear 63 is fixedly connected to the adjusting screw 42. There are two groups of distance adjustment worms 64 corresponding to the distance adjustment worm gears 63 one by one. The distance adjustment worm 64 is adapted to the distance adjustment worm gear 63, and the distance adjustment worm 64 is fixedly connected to the distance adjustment rod 62.

[0024] Turn on the drive motor 32 through the control panel. When the drive motor 32 works, it drives the driving sprocket 333 and the crankshaft 52 to rotate together through the drive rod 35. When the driving sprocket 333 rotates, it drives the driven sprocket 334 and the intermediate sprocket 332 to rotate together through the drive chain 335. When the driven sprocket 334 rotates, it drives the second crushing roller 9 to rotate through the second mounting shaft 10. When the intermediate sprocket 332 rotates, it drives the intermediate gear 341 to rotate through the intermediate shaft 331. When the intermediate gear 341 rotates, it drives the driven gear 342 to rotate through meshing. When the driven gear 342 rotates, it drives the first crushing roller 7 to rotate together through the first mounting shaft 8. The first crushing roller 7 and the second crushing roller 9 rotate together to crush the material in the crushing box 1. When the crankshaft 52 rotates, it drives the pressing plate 51 to swing reciprocally through the rocker 53. The swinging of the pressing plate 51 presses the material towards the space between the first crushing roller 7 and the second crushing roller 9. When it is necessary to increase the distance between the first crushing roller 7 and the second crushing roller 9, rotate the distance adjustment rod 62 to drive the distance adjustment worm 64 to rotate. When the distance adjustment worm 64 rotates, it drives the distance adjustment worm gear 63 to rotate through meshing. When the distance adjustment worm gear 63 rotates, it drives the adjustment screw 42 and the bevel gear 43 to rotate together. When the adjustment screw 42 rotates, it cooperates with the adjustment sleeve 41 to drive the movable box 31 to move downward. When the movable box 31 moves, it drives the drive motor 32, the drive rod 35 and the driving sprocket 333 to move downward together. When the bevel gear 43 rotates, it drives the bevel gear ring 45 to rotate through meshing. When the bevel gear ring 45 rotates, it drives the linkage screw 443 to rotate. The linkage screw 443 drives the linkage collar 441 to move through the linkage sleeve 442. When the linkage sleeve 442 moves, it drives the second crushing roller 9 to move away from the first crushing roller 7 through the second mounting shaft 10. When the second crushing roller 9 moves, it drives the driven sprocket 334 to move together. While the driven sprocket 334 moves away from the intermediate sprocket 332, the driving sprocket 333 moves downward under the drive of the movable box 31, so as to ensure the tension of the drive chain 335. The movement of the second crushing roller 9 adjusts the distance between the first crushing roller 7 and the second crushing roller 9 to an appropriate size.

[0025] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made without departing from the spirit of the present invention within the knowledge scope of those skilled in the art to which the present invention pertains.

Claims

1. A stone crushing device for municipal bridge construction, characterized in that: include: A crushing box (1) having a top of a side wall connected to a feed hopper (2); A first crushing roller (7) is rotatably arranged in the crushing box (1), and the first crushing roller (7) is rotatably connected to the crushing box (1) via a first mounting shaft (8); a second crushing roller (9) movably arranged in the crushing box (1), the second crushing roller (9) being movably connected to the crushing box (1) via a second mounting shaft (10); The installation box (11) is provided in two groups, and the two groups of installation boxes (11) are respectively arranged on the front and back sides of the crushing box (1), and both ends of the first installation shaft (8) and the second installation shaft (10) penetrate the crushing box (1) and extend into the installation box (11); A driving mechanism, which is provided in two groups and corresponds to the installation box (11) one by one, the driving mechanism is arranged in the installation box (11), and the output end of the driving mechanism is respectively connected to the first installation shaft (8) and the second installation shaft (10) for driving the first crushing roller (7) and the second crushing roller (9) to rotate; An adjusting mechanism, which is provided in two groups and corresponds one to one with the installation box (11), the adjusting mechanism being arranged in the installation box (11), one end of the adjusting mechanism being connected to the second installation shaft (10) for adjusting the distance between the first crushing roller (7) and the second crushing roller (9); A distance adjustment mechanism, which is arranged on the crushing box (1) and is transmission-connected to the regulating mechanism; The pressing mechanism is movably arranged in the crushing box (1), the pressing mechanism is arranged above the first crushing roller (7) and the second crushing roller (9), and the pressing mechanism is transmission-connected to the driving mechanism.

2. A stone crushing device for municipal bridge construction according to claim 1, characterized in that: The driving mechanism comprises a movable box (31), a driving motor (32), a driving rod (35), a driving assembly and a transmission assembly; the movable box (31) is slidably arranged in the installation box (11), the driving motor (32) is fixedly connected to the movable box (31), one end of the driving rod (35) is connected to the driving motor (32), the other end of the driving rod (35) passes through the movable box (31) and is rotatably connected to the movable box (31), the driving assembly is arranged in the installation box (11), one end of the driving assembly is connected to the driving rod (35), the other end of the driving assembly is connected to the second installation shaft (10), one end of the transmission assembly is connected to the driving assembly, and the other end of the transmission assembly is connected to the first installation shaft (8).

3. A stone crushing device for municipal bridge construction according to claim 2, characterized in that: The driving assembly comprises an intermediate shaft (331), an intermediate sprocket (332), a driving sprocket (333), a driven sprocket (334) and a transmission chain (335); the intermediate shaft (331) is rotatably arranged in the installation box (11); the intermediate sprocket (332) is fixedly connected to the intermediate shaft (331); the driving sprocket (333) is fixedly connected to the driving rod (35); the driven sprocket (334) is fixedly connected to the second installation shaft (10); and the driving sprocket (333) is transmission-connected to the intermediate sprocket (332) and the driven sprocket (334) via the transmission chain (335).

4. A stone crushing device for municipal bridge construction according to claim 3, characterized in that: The transmission assembly comprises an intermediate gear (341) and a driven gear (342); the intermediate gear (341) is fixedly connected to the intermediate shaft (331), the driven gear (342) is fixedly connected to the first mounting shaft (8), and the intermediate gear (341) and the driven gear (342) are meshed.

5. The stone crushing device for municipal bridge construction according to claim 2 is characterized in that: The adjustment mechanism comprises an adjustment sleeve (41), an adjustment screw (42), a bevel gear (43), a bevel gear ring (45) and a linkage assembly; the adjustment sleeve (41) is fixedly arranged in the movable box (31), the adjustment screw (42) is threadedly connected to the adjustment sleeve (41), both ends of the adjustment screw (42) penetrate the movable box (31) and extend to the outside of the movable box (31), the linkage assembly is arranged in the installation box (11), one end of the linkage assembly is connected to the second installation shaft (10), the bevel gear (43) is fixedly connected to the adjustment screw (42), the bevel gear ring (45) is connected to the linkage assembly, and the bevel gear (43) and the bevel gear ring (45) are meshed.

6. A stone crushing device for municipal bridge construction according to claim 5, characterized in that: The linkage assembly comprises a linkage collar (441), a linkage sleeve (442) and a linkage screw (443); the linkage collar (441) is sleeved on the second installation shaft (10) and is rotationally connected to the second installation shaft (10), the linkage collar (441) is slidingly connected to the installation box (11), the linkage sleeve (442) is fixedly connected to the linkage cylinder (11), one end of the linkage screw (443) is threadedly connected to the linkage sleeve (442), and the other end of the linkage screw (443) is fixedly connected to the bevel gear ring (45).

7. A stone crushing device for municipal bridge construction according to claim 2, characterized in that: The pressing mechanism comprises a pressing plate (51), a crankshaft (52) and a rocker (53); the pressing plate (51) is movably arranged in the crushing box (1); one end of the pressing plate (51) is rotatably connected to the crushing box (1); a plurality of crankshafts (52) are provided; the crankshafts (52) are fixedly connected to the driving rod (35); a plurality of rockers (53) are provided and correspond to the crankshafts (52) one by one; one end of the rocker (53) is rotatably connected to the crankshaft (52); and the other end of the rocker (53) is rotatably connected to the pressing plate (51).

8. The stone crushing device for municipal bridge construction according to claim 5 is characterized in that: The pitch adjustment mechanism comprises a protection box (61), a pitch adjustment rod (62), a pitch adjustment worm wheel (63) and a pitch adjustment worm (64); the protection box (61) is fixedly connected to the top of the crushing box (1); the top end of the adjusting screw (42) passes through the mounting box (11) and the protection box (61) and extends into the protection box (61); one end of the pitch adjustment rod (62) is rotatably arranged in the protection box (61); two sets of pitch adjustment worm wheels (63) are arranged and correspond one-to-one with the adjusting screws (42); the pitch adjustment worm wheels (63) are fixedly connected to the adjusting screws (42); two sets of pitch adjustment worm wheels (64) are arranged and correspond one-to-one with the pitch adjustment worm wheels (63); the pitch adjustment worm wheels (64) are adapted to the pitch adjustment worm wheels (63); and the pitch adjustment worm wheels (64) are fixedly connected to the pitch adjustment rod (62).

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