Roadbed crushing device for road and bridge construction

Abstract

The invention discloses a road bridge construction roadbed crushing device, and relates to the technical field of roadbed crushing, the road bridge construction roadbed crushing device comprises a machine body, a motor is arranged in the machine body, the output end of the motor is provided with a cleaning assembly and a crushing assembly, and the cleaning assembly comprises a lead screw, a moving seat, an electric telescopic rod and a cleaning shovel. The crushing assembly comprises a rotating shaft, a bevel gear set, a cam, a lifting plate, a driving shaft and a crushing drill bit. The motor drives the lead screw and the rotating shaft to rotate forwards, the bevel gear set and the driving shaft are driven to rotate during forward rotation, meanwhile, the rotating shaft drives the cam to rotate, the crushing drill bit can rotate while moving up and down to crush the roadbed, after crushing is completed, the motor rotates backwards, the electric telescopic rod pushes the cleaning shovel to descend, and fragments of the deep roadbed are shoveled out and stacked; according to the structure, automatic switching of crushing and cleaning is achieved through forward and reverse rotation of the motor, and the technical problem that roadbed fragments are hammered into the ground when a crushing hammer is used for crushing a roadbed, and the roadbed fragment recycling difficulty is increased is solved.

Description

Technical Field

[0001] The invention relates to the technical field of roadbed crushing, in particular to a roadbed crushing device for road and bridge construction. Background Art

[0002] Road bridges are generally composed of several parts such as roadbed, pavement, bridges, tunnel projects and traffic engineering facilities. The roadbed is a linear structure built with soil or stone. It bears its own rock and soil weight and the gravity of the pavement, as well as the traffic load transmitted from the pavement. It is an important part of the entire highway structure. The highway roadbed mainly includes the roadbed body, slopes, side ditches and other ancillary facilities. When laying the roadbed, the stones need to be crushed to a suitable size to reduce the gaps for better paving.

[0003] In the prior art, when a road surface is broken, it needs to be repaired. If the repair is directly carried out on the damaged roadbed, the stability of the road surface will be affected and the service life will be greatly reduced. Therefore, a roadbed crushing device is needed to crush the road surface so as to repair the road surface more firmly. However, on some narrower roads, a breaker hammer and other equipment will be used to crush the ground first, and then the crushed roadbed fragments will be recovered. However, this crushing method will cause the breaker hammer to hammer part of the roadbed fragments into the ground during crushing, which increases the difficulty of recovering the roadbed fragments. Summary of the invention

[0004] Based on this, the purpose of the present invention is to provide a roadbed crushing device for road and bridge construction to solve the technical problem that when a breaker hammer is used to crush the roadbed in a narrow road, the roadbed fragments will be hammered into the ground, increasing the difficulty of recovering the roadbed fragments.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a roadbed crushing device for road and bridge construction, comprising a body, a motor is arranged inside the body, a cleaning component and a crushing component are movably connected to the output end of the motor, the cleaning component comprises a screw rod, a movable seat, an electric telescopic rod, and a cleaning shovel, the screw rod is fixedly connected to the output end of the motor, the screw rod is rotatably connected to the movable seat, the bottom of the movable seat is fixedly connected to the electric telescopic rod, the bottom of the electric telescopic rod is fixedly connected to the cleaning shovel, the crushing component comprises a rotating shaft, a bevel gear set, a cam, a lifting plate, a driving shaft and a crushing drill bit, the screw rod is fixedly connected to the rotating shaft, the outside of the rotating shaft is movably connected to the bevel gear set, the bottom of the bevel gear set is fixedly connected to the driving shaft, the bottom of the driving shaft is slidably connected to the crushing drill bit, one end of the rotating shaft is movably connected to the cam, the lifting plate is movably connected to the cam, and the lifting plate is located at the bottom of the cam, and one end of the lifting plate is rotatably connected to the driving shaft.

[0006] The present invention starts the motor inside the machine body, and the screw rod of the cleaning component and the rotating shaft of the crushing component are of integrated design. One end of the screw rod is fixedly connected to the motor output shaft, and the motor drives the screw rod and the rotating shaft to rotate synchronously. When the motor rotates forward, it drives the bevel gear set and the driving shaft to rotate, thereby controlling the crushing drill bit to rotate and implement crushing. At the same time, the rotating shaft drives the cam to rotate, and the lifting plate is pushed up and down by the connecting rod and the connecting seat. The lifting plate drives the movable plate to compress the spring and drive the crushing drill bit to descend. The crushing drill bit can rotate while moving up and down, which is convenient for crushing the roadbed. After the crushing is completed, the motor reverses, the bevel gear set and the cam stop rotating due to the one-way bearing, and the electric telescopic rod pushes the cleaning shovel to descend, shovels out the deep roadbed debris and accumulates it, and the moving seat is reset by the slider and the slide rail. The protective plate and the first spring cooperate to ensure the stable movement of the moving seat. The structure realizes the automatic switching of crushing and cleaning through the forward and reverse rotation of the motor, solves the problem of low efficiency of manual crushing and recovery in narrow areas, effectively reduces manpower consumption and improves operation continuity.

[0007] Furthermore, the crushing assembly further comprises a connecting rod, a connecting rod and a connecting seat, the connecting rod is rotatably connected to the outside of the cam, the bottom of the connecting rod is rotatably connected to the connecting rod, the connecting rod is fixedly connected to the connecting seat, the crushing assembly further comprises a support plate and a second spring, the support plate is located at the bottom of the bevel gear set, and the support plate is fixedly connected to the body, and the second spring is located at the bottom of the support plate; A movable plate is fixedly connected to the bottom of the second spring, and the movable plate is elastically connected to the support plate through the second spring, and one end of the lifting plate is located inside the movable plate. The crushing assembly also includes a third spring, a sliding cavity and a driving block. The third spring is located between the movable plate and the crushing drill bit, and a sliding cavity is provided inside the crushing drill bit. The driving block is fixedly connected to the bottom of the driving shaft.

[0008] By adopting the above technical solution, the rotating shaft will also drive the cam to rotate when it rotates forward, so that the connecting rod can move up and down. Through the cooperation of the connecting rod and the connecting seat, the lifting plate can move up and down, and the driving shaft inside the crushing drill bit slides in the sliding cavity through the driving block, ensuring that the crushing drill bit can rotate while descending, thereby accelerating the crushing effect of the roadbed.

[0009] Further, the cleaning assembly further includes a slider, a slide rail and a slide groove, the slider is fixedly connected to the top of the moving seat, the slide rail is fixedly connected to the inside of the machine body, and a slide groove is provided inside the slide rail, the cleaning assembly further includes two sets of fixed plates, the fixed plates are located outside the screw rod, and the fixed plates are fixedly connected to the machine body; One side of one group of the fixed plates is fixedly connected with a first spring, one side of the fixed plate is elastically connected to the protective plate through the first spring, the slider is slidably connected to the slide rail through a slide groove, and the cross-sectional size of the slider matches the cross-sectional size of the slide groove.

[0010] By adopting the above technical solution, the moving seat will move on the screw rod with the cooperation of the slider and the slide rail, so that the cleaning shovel can be controlled to move. When the roadbed is broken again, the motor rotates forward, the moving seat returns to the initial position, and when it contacts the protective plate, it disengages from the thread on the surface of the screw rod and squeezes the protective plate. Under the elastic action of the first spring, a section of the moving seat will always be in meshing state with the thread on the outer surface of the screw rod, so that when the motor reverses, the moving seat can be moved.

[0011] Furthermore, a crawler is movably connected to the bottom of the machine body, and a control component is fixedly connected to the bottom of the machine body.

[0012] By adopting the above technical solution, the user can control the track through the control component to facilitate the movement of the entire equipment.

[0013] In summary, the present invention mainly has the following beneficial effects: 1. The present invention starts the motor inside the machine body, and the screw rod of the cleaning component and the rotating shaft of the crushing component are integrated. One end of the screw rod is fixedly connected to the motor output shaft. The motor drives the screw rod and the rotating shaft to rotate synchronously. When the motor rotates forward, it drives the bevel gear set and the driving shaft to rotate, thereby controlling the crushing drill bit to rotate and implement crushing. At the same time, the rotating shaft drives the cam to rotate, and the lifting plate is pushed up and down through the connecting rod and the connecting seat. The lifting plate drives the movable plate to compress the spring and drive the crushing drill bit to descend. The crushing drill bit can rotate while moving up and down, which is convenient for crushing the roadbed; 2. In the present invention, after crushing is completed, the motor reverses, the bevel gear set and the cam stop rotating due to the one-way bearing, the electric telescopic rod pushes the cleaning shovel down, and the deep roadbed debris is shoveled out and accumulated. The moving seat is reset by the cooperation of the slider and the slide rail, and the protective plate and the first spring cooperate to ensure the stable movement of the moving seat. This structure realizes the automatic switching between crushing and cleaning through the forward and reverse rotation of the motor, which solves the technical problem that when using a breaker to crush the roadbed, the roadbed debris will be hammered into the ground, which increases the difficulty of recovering the roadbed debris. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the cutaway structure of the present invention; Figure 2 It is a schematic diagram of the structure of some parts of the present invention; Figure 3 For the present invention Figure 2 A magnified image of point A; Figure 4 For the present invention Figure 2 The enlarged view of point B; Figure 5 It is a cutaway view of some parts of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of point C; Figure 7 For the present invention Figure 5 The enlarged view of point D; Figure 8 It is a structural schematic diagram of local parts of the present invention; Fig. 9 For the present invention Figure 8 The enlarged view of point E; Fig.10 For the present invention Figure 8 Enlarged view of point F.

[0015] In the figure: 1. body; 2. motor; 3. cleaning component; 301. screw; 302. moving seat; 303. electric telescopic rod; 304. cleaning shovel; 305. slider; 306. slide rail; 307. slide groove; 308. fixed plate; 309. first spring; 310. protective plate; 4. crushing component; 401. rotating shaft; 402. bevel gear set; 403. cam; 404. connecting rod; 405. connecting rod; 406. connecting seat; 407. lifting plate; 408. driving shaft; 409. supporting plate; 410. second spring; 411. movable plate; 412. third spring; 413. crushing drill bit; 414. sliding cavity; 415. driving block; 5. crawler; 6. control component. DETAILED DESCRIPTION

[0016] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0017] The following describes an embodiment of the present invention based on its overall structure.

[0018] A roadbed crushing device for road and bridge construction, such as Figure 1-10 As shown, it includes a machine body 1, a motor 2 is arranged inside the machine body 1, and a cleaning component 3 and a crushing component 4 are movably connected to the output end of the motor 2. At this time, the motor 2 inside the machine body 1 is started, and the screw rod 301 in the cleaning component 3 and the rotating shaft 401 in the crushing component are integrated, and one end of the screw rod 301 is fixedly connected to the output shaft of the motor 2, so the output end of the motor 2 will drive the screw rod 301 and the rotating shaft 401 to rotate together; Furthermore, the cleaning assembly 3 includes a screw rod 301, a moving seat 302, an electric telescopic rod 303, and a cleaning shovel 304. The screw rod 301 is fixedly connected to the output end of the motor 2, the screw rod 301 is rotatably connected to the moving seat 302, the bottom of the moving seat 302 is fixedly connected to the electric telescopic rod 303, and the bottom of the electric telescopic rod 303 is fixedly connected with the cleaning shovel 304. The motor 2 reverses to drive the screw rod 301 to reverse, and the moving seat 302 moves on the screw rod 301. While moving, the electric telescopic rod 303 is synchronously started to push the cleaning shovel 304 down until it reaches the broken roadbed surface, and then it descends. Under the action of the moving seat 302, the cleaning shovel 304 is obliquely inserted into the broken roadbed surface, and the roadbed fragments deep into the ground are shoveled out together; Furthermore, the crushing assembly 4 includes a rotating shaft 401, a bevel gear set 402, a cam 403, a lifting plate 407, a driving shaft 408 and a crushing drill bit 413, the screw rod 301 is fixedly connected to the rotating shaft 401, the outside of the rotating shaft 401 is movably connected to the bevel gear set 402, the bottom of the bevel gear set 402 is fixedly connected to the driving shaft 408, and the bottom of the driving shaft 408 is slidably connected to the crushing drill bit 413, wherein the motor 2 will rotate forward, so that the rotating shaft 401 rotates forward together, thereby driving the bevel gear set 402 to rotate forward, and the bevel gear set 402 is fixedly connected to the driving shaft 408, so the driving shaft 408 will rotate together with the bevel gear set 402, thereby controlling the rotation of the crushing drill bit 413, and facilitating the rapid crushing of the roadbed; Furthermore, one end of the rotating shaft 401 is movably connected to the cam 403, and the lifting plate 407 is movably connected to the cam 403, and the lifting plate 407 is located at the bottom of the cam 403, and one end of the lifting plate 407 is rotatably connected to the driving shaft 408. When the rotating shaft 401 rotates forward, it will also drive the cam 403 to rotate, so that the lifting plate 407 can move up and down, thereby facilitating the up and down movement of the crushing drill bit 413; In the example, the crushing assembly 4 further includes a connecting rod 404, a connecting rod 405 and a connecting seat 406, the connecting rod 404 is rotatably connected to the outside of the cam 403, the bottom of the connecting rod 404 is rotatably connected to the connecting rod 405, the connecting rod 405 is fixedly connected to the connecting seat 406, the crushing assembly 4 further includes a support plate 409 and a second spring 410, the support plate 409 is located at the bottom of the bevel gear set 402, and the support plate 409 is fixedly connected to the body 1, and the second spring 410 is located at the bottom of the support plate 409; The rotating shaft 401 will also drive the cam 403 to rotate when rotating forward, so that the connecting rod 404 can move up and down, and the lifting plate 407 can move up and down through the cooperation of the connecting rod 405 and the connecting seat 406; Furthermore, a movable plate 411 is fixedly connected to the bottom of the second spring 410, and the movable plate 411 is elastically connected to the support plate 409 through the second spring 410, and one end of the lifting plate 407 is located inside the movable plate 411, so that the movable plate 411 is driven to move up and down, and a second spring 410 is arranged between the top of the movable plate 411 and the support plate 409, which can assist the movable plate 411 to quickly reset after descending; Furthermore, the crushing assembly 4 further includes a third spring 412, a sliding cavity 414 and a driving block 415. The third spring 412 is located between the movable plate 411 and the crushing drill bit 413. The crushing drill bit 413 is provided with a sliding cavity 414. The driving block 415 is fixedly connected to the bottom of the driving shaft 408. The driving shaft 408 inside the crushing drill bit 413 slides in the sliding cavity 414 through the driving block 415, thereby ensuring that the crushing drill bit 413 can rotate while descending, thereby accelerating the crushing effect on the roadbed. In the example, the cleaning component 3 further includes a slider 305, a slide rail 306 and a slide groove 307. The slider 305 is fixedly connected to the top of the moving seat 302, the slide rail 306 is fixedly connected to the inside of the body 1, and the slide groove 307 is provided inside the slide rail 306. The slider 305 is slidably connected to the slide rail 306 through the slide groove 307. The cross-sectional size of the slider 305 matches the cross-sectional size of the slide groove 307. The moving seat 302 will move on the screw rod 301 under the cooperation of the slider 305 and the slide rail 306, so that the cleaning shovel 304 can be controlled to move. Furthermore, the cleaning assembly 3 also includes two groups of fixed plates 308, the fixed plates 308 are located outside the screw rod 301, and the fixed plates 308 are fixedly connected to the body 1, one side of one group of fixed plates 308 is fixedly connected to a first spring 309, and one side of the fixed plates 308 is elastically connected to the protective plate 310 through the first spring 309, wherein when the roadbed is broken again, the motor 2 rotates forward, the movable seat 302 returns to the initial position, and when it contacts the protective plate 310, it disengages from the thread on the surface of the screw rod 301, and squeezes the protective plate 310 at the same time, under the elastic action of the first spring 309, a section of the movable seat 302 is always in meshing state with the thread on the outer surface of the screw rod 301, so that when the motor 2 is reversed, the movable seat 302 can be moved; In the example, a track 5 is movably connected to the bottom of the body 1, and a control component 6 is fixedly connected to the bottom of the body 1, wherein a user can control the track 5 through the control component 6 to facilitate the movement of the entire device.

[0019] The working principle of the present invention is as follows: when in use, the device is first driven to the old roadbed area that needs to be repaired through the control component 6. Since the device itself is relatively small, it can enter some areas with small spaces. The user first needs to crush the old roadbed that needs to be repaired, and then start the motor 2 inside the body 1. The screw rod 301 in the cleaning component 3 and the rotating shaft 401 in the crushing component are integrated, and one end of the screw rod 301 is fixedly connected to the output shaft of the motor 2, so the output end of the motor 2 will drive the screw rod 301 and the rotating shaft 401 to rotate together; When the roadbed is broken, the motor 2 will rotate forward, causing the rotating shaft 401 to rotate forward together, thereby driving the bevel gear set 402 to rotate forward, and the bevel gear set 402 is fixedly connected to the drive shaft 408, so the drive shaft 408 will rotate with the bevel gear set 402, thereby controlling the rotation of the crushing drill bit 413, which is convenient for quickly breaking the roadbed; At the same time, the rotating shaft 401 will also drive the cam 403 to rotate when rotating forward, so that the connecting rod 404 can move up and down, and through the cooperation of the connecting rod 405 and the connecting seat 406, the lifting plate 407 can move up and down; One end of the lifting plate 407 is located inside the movable plate 411, so it drives the movable plate 411 to move up and down, and a second spring 410 is arranged between the top of the movable plate 411 and the support plate 409, which can assist the movable plate 411 to quickly reset after it is lowered. After the movable plate 411 is lowered, the third spring 412 can be squeezed, thereby driving the rotating crushing drill 413 to be lowered; The driving shaft 408 inside the crushing drill bit 413 slides in the sliding cavity 414 through the driving block 415, ensuring that the crushing drill bit 413 can rotate while descending, thereby accelerating the crushing effect on the roadbed; When the crushing drill bit 413 is driven down by the lifting plate 407, the bottom of the crushing drill bit 413 will first contact the surface of the roadbed, and then the crushing drill bit 413 will initially crush the surface of the roadbed, and then the third spring 412 will be squeezed by the crushing drill bit 413, and then the lifting plate 407 will further drive the crushing drill bit 413 to descend until the lifting plate 407 is controlled by the cam 403 to move to the bottom, and then the crushing drill bit 413 will extend into the roadbed, and at the same time, the rotation of the crushing drill bit 413 can quickly crush the roadbed; Then the crushing drill bit 413 will rise under the action of the lifting plate 407 and the second spring 410, and the crushing drill bit 413 will reciprocate up and down under the rotation of the cam 403, and the third spring 412 will further push the crushing drill bit 413 into the roadbed after it falls again and again, thereby achieving a perfect crushing effect on the roadbed; After a certain distance of the roadbed is broken, it is necessary to recycle and clean the roadbed. However, a part of the roadbed will go deep into the ground when it is broken, which makes it difficult for the recycling personnel to recover it. Therefore, the motor 2 is reversed at this time, and a one-way bearing is arranged inside the bevel gear set 402 and the cam 403, so that when the rotating shaft 401 is reversed, the bevel gear set 402 and the cam 403 will not rotate. At this time, the screw rod 301 reverses, and the moving seat 302 moves on the screw rod 301 with the cooperation of the slider 305 and the slide rail 306. At the same time, the electric telescopic rod 303 is synchronously started to push the cleaning shovel 304 down until it reaches the broken roadbed surface, and then it descends. Under the action of the moving seat 302, the cleaning shovel 304 is inserted obliquely into the broken roadbed surface, and the roadbed fragments deep into the ground are shoveled out together; After the moving base 302 moves further, the cleaning shovel 304 will clean up the roadbed debris and pile them up on both sides of the bottom of the body 1. After the body 1 leaves the road section, it is convenient for subsequent recycling personnel to recycle the roadbed debris; When the roadbed is broken again, the motor 2 rotates forward, the screw rod 301 rotates synchronously, and the electric telescopic rod 303 also retracts, so that the cleaning shovel 304 returns to the inside of the machine body 1, and the moving seat 302 also returns to the initial position, and when it contacts the protective plate 310, it disengages from the thread on the surface of the screw rod 301, and squeezes the protective plate 310. Under the elastic action of the first spring 309, a section of the moving seat 302 is always in meshing state with the thread on the outer surface of the screw rod 301, so that when the motor 2 is reversed, the moving seat 302 can be moved with it; The above structure can solve the technical problem that when a breaker hammer is used to break the roadbed, the roadbed fragments will be hammered into the ground, which increases the difficulty of recovering the roadbed fragments.

[0020] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A roadbed crushing device for road and bridge construction, comprising a body (1), characterized in that: The machine body (1) is provided with a motor (2) inside. The output end of the motor (2) is movably connected to a cleaning component (3) and a crushing component (4). The cleaning component (3) comprises a screw rod (301), a movable seat (302), an electric telescopic rod (303), and a cleaning shovel (304). The screw rod (301) is fixedly connected to the output end of the motor (2). The screw rod (301) is rotatably connected to the movable seat (302). The bottom of the movable seat (302) is fixedly connected to the electric telescopic rod (303). The bottom of the electric telescopic rod (303) is fixedly connected to the cleaning shovel (304). The crushing component (4) comprises a rotating shaft (401), a bevel gear set (402), a cam (403), a lifting plate (407), a drive shaft (408) and a crushing drill bit (413), the screw rod (301) is fixedly connected to the rotating shaft (401), the exterior of the rotating shaft (401) is movably connected to the bevel gear set (402), the bottom of the bevel gear set (402) is fixedly connected to the drive shaft (408), the bottom of the drive shaft (408) is slidably connected to the crushing drill bit (413), one end of the rotating shaft (401) is movably connected to the cam (403), the lifting plate (407) is movably connected to the cam (403), the lifting plate (407) is located at the bottom of the cam (403), and one end of the lifting plate (407) is rotatably connected to the drive shaft (408).

2. The roadbed crushing device for road and bridge construction according to claim 1 is characterized by: The crushing assembly (4) further comprises a connecting rod (404), a connecting rod (405) and a connecting seat (406); the connecting rod (404) is rotatably connected to the outside of the cam (403); the bottom of the connecting rod (404) is rotatably connected to the connecting rod (405); and the connecting rod (405) is fixedly connected to the connecting seat (406).

3. The roadbed crushing device for road and bridge construction according to claim 1 is characterized by: The crushing assembly (4) further comprises a support plate (409) and a second spring (410); the support plate (409) is located at the bottom of the bevel gear set (402), and the support plate (409) is fixedly connected to the machine body (1); and the second spring (410) is located at the bottom of the support plate (409).

4. The roadbed crushing device for road and bridge construction according to claim 3 is characterized by: A movable plate (411) is fixedly connected to the bottom of the second spring (410); the movable plate (411) is elastically connected to the support plate (409) via the second spring (410); and one end of the lifting plate (407) is located inside the movable plate (411).

5. The roadbed crushing device for road and bridge construction according to claim 3 is characterized by: The crushing assembly (4) further comprises a third spring (412), a sliding cavity (414) and a driving block (415); the third spring (412) is located between the movable plate (411) and the crushing drill bit (413); a sliding cavity (414) is provided inside the crushing drill bit (413); and the driving block (415) is fixedly connected to the bottom of the driving shaft (408).

6. The roadbed crushing device for road and bridge construction according to claim 1 is characterized by: The cleaning assembly (3) further comprises a slider (305), a slide rail (306) and a slide groove (307); the slider (305) is fixedly connected to the top of the movable seat (302); the slide rail (306) is fixedly connected to the inside of the machine body (1); and the slide groove (307) is provided inside the slide rail (306).

7. The roadbed crushing device for road and bridge construction according to claim 1 is characterized by: The cleaning assembly (3) further comprises two sets of fixing plates (308), wherein the fixing plates (308) are located outside the screw rod (301), and the fixing plates (308) are fixedly connected to the machine body (1).

8. The roadbed crushing device for road and bridge construction according to claim 7 is characterized by: One side of one group of the fixing plates (308) is fixedly connected to a first spring (309), and one side of the fixing plates (308) is elastically connected to a protective plate (310) via the first spring (309).

9. The roadbed crushing device for road and bridge construction according to claim 6, characterized in that: The slider (305) is slidably connected to the slide rail (306) via the slide groove (307), and the cross-sectional size of the slider (305) matches the cross-sectional size of the slide groove (307).

10. The roadbed crushing device for road and bridge construction according to claim 1, characterized in that: The bottom of the machine body (1) is movably connected to a crawler belt (5), and the bottom of the machine body (1) is fixedly connected to a control component (6).

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