Safety protection device for municipal road maintenance foundation pit

Abstract

The utility model relates to a safety protection device for a municipal road maintenance foundation pit. The utility model is applicable to the technical field of road maintenance. According to the technical scheme, the base supporting mechanism comprises a base plate, vertical plates, groove plates and first moving assemblies, the vertical plates are correspondingly connected to the two sides of the base plate, the first moving assemblies are correspondingly connected to the side walls of the vertical plates, the groove plates are symmetrically arranged at the two ends of the base plate, and the two ends of each groove plate are correspondingly connected with the first moving assemblies on the two sides correspondingly; the first moving assembly can drive the groove plate to move in the axial direction of the vertical plate. The foundation pit supporting mechanism comprises angle adjusting assemblies and slope protection plates, the groove plates at the two ends are connected with the slope protection plates through the angle adjusting assemblies, and the angle adjusting assemblies are used for adjusting the supporting angles of the slope protection plates so as to adapt to the inclination angle of the foundation pit side slope; and the driving mechanism comprises an output assembly and a first transmission assembly, a baffle is connected between the vertical plates on the two sides, the output assembly is arranged on the baffle, and the output assembly is in transmission connection with the first moving assembly through the first transmission assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of road maintenance, in particular to a safety protection device for a municipal road maintenance foundation pit. Background Technique

[0002] A foundation pit is an earth pit excavated at the design position of the foundation according to the base elevation and the foundation plan dimensions. When carrying out municipal road projects, it is necessary to first dig a foundation pit for the subsequent project. After the foundation pit is dug, it needs to be protected to prevent the newly dug foundation pit from being damaged and affecting the progress of the subsequent process. Currently, it is usually supported by a support frame, and manual operation is relatively cumbersome.

[0003] In the Chinese patent with the publication number CN 112302036 B, a safety protection device for a municipal road maintenance foundation pit is mentioned, which includes a road surface foundation pit, and also includes a telescopic mechanism arranged inside the road surface foundation pit. Support mechanisms capable of abutting against both sides inside the road surface foundation pit are respectively arranged on both sides of the telescopic mechanism. Each support mechanism is respectively connected to both sides of the telescopic mechanism. Each support mechanism includes a bottom support assembly and an upper adjustment support assembly. Each bottom support assembly includes a first abutting plate capable of abutting against one side inside the road surface foundation pit. Each upper adjustment support assembly includes a second abutting plate capable of abutting against one side inside the road surface foundation pit. The first abutting plate and the second abutting plate are corresponding up and down. This device can efficiently support the inner wall of the foundation pit according to the depth and width of the foundation pit, improving the support efficiency.

[0004] The above-mentioned device has drawbacks in the specific use process. During the excavation of the foundation pit, in order to prevent the side slope of the foundation pit from collapsing, it is necessary to ensure that the slope has a certain inclination angle when building the side slope. The above-mentioned device can only support the vertically established foundation pit side slope by setting concave and convex surfaces perpendicular to the ground, and cannot adaptively adjust the support according to the inclination angles of different foundation pit side slopes, and the support effect of the above-mentioned device needs to be further improved. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is: aiming at the above problems, to provide a safety protection device for a municipal road maintenance foundation pit.

[0006] The technical scheme adopted by the utility model is: a safety protection device for a municipal road maintenance foundation pit, characterized by comprising:

[0007] Base support mechanism, including a base plate, vertical plates, groove plates and a first moving component. The vertical plates are correspondingly connected to both sides of the base plate. The first moving component is correspondingly connected to the side walls of the vertical plates. Symmetrically arranged groove plates are provided at both ends of the base plate. Both ends of the groove plates are respectively correspondingly connected to the first moving components on both sides. The first moving component can drive the groove plates to move along the axial direction of the vertical plates;

[0008] Foundation pit support mechanism, including an angle adjustment component and a slope protection plate. The slope protection plates are connected to both ends of the groove plates through the angle adjustment component. The angle adjustment component is used to adjust the support angle of the slope protection plate to adapt to the inclination angle of the foundation pit side slope;

[0009] Drive mechanism, including an output component and a first transmission component. A baffle is connected between the two vertical plates. The output component is provided on the baffle. The output component is in transmission connection with the first moving component through the first transmission component. The output component can control the two ends of the groove plates to move towards or away from each other.

[0010] By the above technical means, the output component controls the two ends of the groove plates to move towards or away from each other through the first transmission component, so that the groove plates drive the corresponding slope protection plates to support the foundation pit side slope. And the angle adjustment component is used to adjust the support angle of the slope protection plate to adapt to the inclination angle of the foundation pit side slope, so that the device has good adaptability and support effect for different foundation pits.

[0011] In some embodiments, the first moving component includes a bidirectional lead screw, a guide block, a first guide rail, a first slider and a first connecting plate. The first guide rail is connected to the outer side wall surface of the vertical plate. Two first sliders are slidably connected to the first guide rail. The first slider is connected to the first connecting plate. The outer side of the first connecting plate is connected to the end of the corresponding groove plate through an L-shaped rod. The inner side of the first connecting plate is connected to the guide block. The two guide blocks penetrate and are threadedly connected to the bidirectional lead screw. The bidirectional lead screw is in transmission connection with the first transmission component.

[0012] In some embodiments, the output component includes a servo motor and a circular shaft. The servo motor is fixedly connected to the side wall of the baffle. The output end of the servo motor is connected to the circular shaft through a coupling. The circular shaft is in transmission connection with the bidirectional lead screw through the first transmission component. The first transmission component can drive the two bidirectional lead screws on both sides to rotate in the same direction under the drive of the servo motor.

[0013] In some embodiments, the first transmission assembly includes a main pulley, a secondary pulley, and a transmission belt. The main pulley is sleeved on the outer wall of the circular shaft, and the secondary pulley is sleeved in the middle of the two-way lead screws on both sides. The main pulley and the secondary pulley are drivingly connected by the transmission belt.

[0014] In some embodiments, the output assembly is drivingly connected to the reinforcement assembly through a second transmission assembly. The reinforcement assembly can extend into the soil at the bottom of the device under the drive of the output assembly.

[0015] In some embodiments, the second transmission assembly includes a first bevel gear, a second bevel gear, a bearing, and a shaft rod. The reinforcement assembly includes a hydraulic rod, a tip rod, and a helical blade. The first bevel gear is sleeved on the outer wall of the end of the circular shaft. An installation hole is formed in the base plate, and the shaft rod is rotatably connected in the installation hole through the bearing. The second bevel gear meshing with the first bevel gear is provided at the top of the shaft rod. The bottom of the shaft rod is connected to the tip rod through the hydraulic rod, and the helical blade is connected to the outer wall of the tip rod.

[0016] In some embodiments, the outer side wall of the first connecting plate is connected to the L-shaped frame rod through a second moving assembly. The second moving assembly is connected to a guiding assembly. The second moving assembly can drive the L-shaped frame rod to move in the vertical direction, and the guiding assembly can adjust the moving path of the L-shaped frame rod.

[0017] In some embodiments, the second moving assembly includes a second guide rail, a second slider, and a second connecting plate. The guiding assembly includes a connecting shaft, a roller, and a groove rail. The second guide rail arranged in the vertical direction is connected to the outer side of the first connecting plate. The second slider is slidably connected to the second guide rail. The second slider is connected to the second connecting plate. The top of the second connecting plate is connected to the end of the groove plate through the L-shaped frame rod. The groove rail is of a W-shaped structure and is arranged on the base plate. The roller is connected to the side wall of the second connecting plate through the connecting shaft, and the roller is movably connected in the cavity of the groove rail.

[0018] In some embodiments, the angle adjustment assembly includes a plate and an electric push rod. The top of the groove plate is connected to the top of the slope protection plate through the hinged electric push rod. The bottom of the groove plate is rotatably connected to the bottom of the slope protection plate through the plate.

[0019] In some embodiments, an unfolding assembly is provided between the slot plate and the angle adjustment assembly. The unfolding assembly includes a telescopic frame, a front edge plate, and an oil pressure rod. The telescopic frame and the oil pressure rod are movably connected between the slot plate and the front edge plate. The top of the front edge plate is movably connected to the top of the slope protection plate through the electric push rod correspondingly, and the bottom of the front edge plate is movably connected to the bottom of the slope protection plate through the sheet plate correspondingly.

[0020] The beneficial effects of the present utility model are as follows:

[0021] 1. By controlling the movement of the slot plates at both ends through the driving mechanism, the slope protection plates on the slot plates move towards or away from each other in the foundation pit, and then the support angle of the slope protection plates is adjusted by using the angle adjustment assembly to adapt to the inclination angle of the side slope of the foundation pit, so as to be able to adaptively adjust the support for different inclination angles of the side slope of the foundation pit, thereby achieving a better support effect.

[0022] 2. When the driving mechanism drives the slot plates and the slope protection plates to support the side slope of the foundation pit, the reinforcement assembly is synchronously driven, so that the reinforcement assembly extends into the soil at the bottom of the device to improve the overall support stability of the device.

[0023] 3. By adjusting the movement path of the slot plates and the slope protection plates through the guiding assembly, with the help of the slot rail with a W-shaped structure in the guiding assembly, the movement track of the foundation pit support mechanism is in a wavy line shape. In this process, the slope protection plate moves from the lower part to the upper part and moves horizontally as a whole, which is convenient for better compaction and abutment of the side slope of the foundation pit, and improves the support and protection effect. Description of the Drawings

[0024] Figure 1 is the structural schematic diagram of the present application.

[0025] Figure 2 is the structural schematic diagram of the first perspective of the present application.

[0026] Figure 3 is Figure 2 the enlarged view of area A in

[0027] Figure 4 is the structural schematic diagram of the second perspective of the present application.

[0028] Figure 5 is the structural schematic diagram of the third perspective of the present application.

[0029] Figure 6 is the structural schematic diagram of the fourth perspective of the present application.

[0030] Description of the Reference Numerals:

[0031] 100. Base support mechanism; 101. Substrate; 102. Vertical plate; 103. First guide rail; 104. First slider; 105. First connecting plate; 106. Second guide rail; 107. Second slider; 108. Second connecting plate; 109. Groove rail; 110. Connecting shaft; 111. Roller; 200. Driving mechanism; 201. Baffle; 202. Guide block; 203. Bi-directional lead screw; 204. Auxiliary pulley; 205. Servo motor; 206. Round shaft; 207. Main pulley; 208. Transmission belt; 209. First helical gear; 210. Second helical gear; 211. Bearing; 212. Shaft rod; 213. Hydraulic rod; 214. Spiral blade; 300. Foundation pit support mechanism; 301. L-shaped frame rod; 302. Groove plate; 303. Telescopic frame; 304. Front plate; 305. Oil pressure rod; 306. Plate; 307. Slope protection plate; 308. Electric push rod.

[0032] This specification includes references to "one embodiment" or "embodiments". The appearances of the phrases "in one embodiment" or "in embodiments" do not necessarily refer to the same embodiment. Specific features, structures, or characteristics may be combined in any suitable manner consistent with this disclosure.

[0033] "Comprising", this term is open-ended. As used in the appended claims, this term does not exclude additional structures or steps.

[0034] "First", "second", etc. As used herein, these terms serve as labels for the nouns preceding them and do not imply any type of ordering (e.g., spatial, temporal, logical, etc.). Detailed implementation manners

[0035] In order to enable those skilled in the art of this technology to better understand the solution of this utility model, the technical solution of this utility model will be further described below in conjunction with specific embodiments.

[0036] In conjunction with Figures 1 to 6As shown, this embodiment is a safety protection device for a municipal road maintenance foundation pit, comprising a base support mechanism 100, a foundation pit support mechanism 300 and a driving mechanism 200. The base support mechanism 100 comprises a base plate 101, a vertical plate 102, a groove plate 302 and a first moving assembly. The foundation pit support mechanism 300 comprises an angle adjustment assembly and a slope protection plate 307. The driving mechanism 200 comprises an output assembly and a first transmission assembly. The two sides of the base plate 101 are correspondingly connected with the vertical plates 102, and the side walls of the vertical plates 102 facing each other are correspondingly connected with the first moving assembly. The two ends of the base plate 101 are provided with symmetrically arranged groove plates 302, and the two ends of the groove plates 302 are respectively connected with the first moving assemblies on both sides. The first moving assembly can drive the groove plates 302 to move along the axial direction of the vertical plates 102. The groove plates 302 at both ends are connected with the slope protection plates 307 through the angle adjustment assembly. The angle adjustment assembly is used to adjust the support angle of the slope protection plates 307 to adapt to the inclination angle of the foundation pit side slope. A baffle 201 is connected between the vertical plates 102 on both sides. An output component is provided on the baffle 201. The output component is transmission-connected to the first moving component via the first transmission component. The output component can control the trough plates 302 and the slope protection plates 307 at both ends to move toward or away from each other.

[0037] In some embodiments, such as Figure 2 and Figure 3 As shown, the first moving assembly includes a bidirectional screw rod 203, a guide block 202, a first guide rail 103, a first slider 104 and a first connecting plate 105. The outer wall of the vertical plate 102 is connected to the first guide rail 103. Two first sliders 104 are slidably connected to the first guide rail 103. The first slider 104 is connected to the first connecting plate 105. The outer sides of the two first connecting plates 105 are connected to the ends of the corresponding slot plates 302 at both ends through the L-shaped frame rod 301. The inner sides of the two first connecting plates 105 are connected to the guide blocks 202. The two guide blocks 202 are respectively provided with a first internal thread slot hole and a second internal thread slot hole. The bidirectional screw rod 203 passes through the first internal thread slot hole and the second internal thread slot hole, so that the bidirectional screw rod 203 passes through the two guide blocks 202 and is threadedly connected thereto. The bidirectional screw rod 203 is in transmission connection with the first transmission assembly.

[0038] Furthermore, the outer wall of the first connecting plate 105 is connected to the L-shaped rod 301 via a second movable assembly, and the second movable assembly is connected to a guide assembly. The second movable assembly can drive the L-shaped rod 301 to move in a vertical direction, and the guide assembly can adjust the moving path of the L-shaped rod 301.

[0039] Further, the second moving component includes a second guide rail 106, a second slider 107 and a second connecting plate 108. The guiding component includes a connecting shaft 110, a roller 111 and a groove rail 109. A second guide rail 106 arranged vertically is fixedly connected to the outer side of the first connecting plate 105. The second guide rail 106 is slidably connected with a second slider 107. The second slider 107 is fixedly connected with a second connecting plate 108. The top of the second connecting plate 108 is connected to the end of a groove plate 302 through an L-shaped rod 301. The groove rail 109 is fixedly arranged on the substrate 101. In this embodiment, the groove rail 109 has a W-shaped structure. A roller 111 is rotatably connected to the outer side wall of the second connecting plate 108 through a connecting shaft 110. The roller 111 is movably connected within the cavity of the groove rail 109.

[0040] After the foundation pit excavation is completed, hoist this device into the foundation pit. Drive the two first connecting plates 105 to move away from each other through the driving mechanism 200. During the movement, the first connecting plate 105 drives the roller 111 on the second connecting plate 108 to move inside the groove rail 109. At the same time, the groove rail 109 has a W-shaped structure, and the first connecting plate 105 and the second connecting plate 108 are slidably matched through the second guide rail 106 and the second slider 107, so that the roller 111 drives the foundation pit support mechanism 300 to move along the cavity path of the groove rail 109. The foundation pit support mechanism 300 moves from the high position of the groove rail 109 to the low position of the groove rail 109, and further moves from the low position of the groove rail 109 to the high position of the groove rail 109. Its movement trajectory is wavy. During this process, the slope protection plate 307 moves from below to above, and the slope protection plate 307 moves horizontally as a whole, thus facilitating better compaction and abutment against the side slope of the foundation pit, and the support and protection effect is better.

[0041] In some embodiments, as Figure 4 shown in Figure 5 the figure, the angle adjustment component includes a plate 306 and an electric push rod 308. The top of the groove plate 302 is connected to the top of the slope protection plate 307 through a hinged electric push rod 308. The bottom of the groove plate 302 is rotatably connected to the bottom of the slope protection plate 307 through a plate 306.

[0042] Further, an unfolding component is provided between the groove plate 302 and the angle adjustment component. The unfolding component includes a telescopic frame 303, a front edge plate 304 and an oil pressure rod 305. A telescopic frame 303 and an oil pressure rod 305 are movably connected between the groove plate 302 and the front edge plate 304. The top of the front edge plate 304 is hinged with an electric push rod 308. The output end of the electric push rod 308 is movably connected to the top of the slope protection plate 307. Symmetrically fixed to the bottom of the front edge plate 304 are plates 306, and the plates 306 are rotatably connected to the bottom of the slope protection plate 307.

[0043] When in use, the staff can adjust the inclination angle of the slope protection plate 307 by driving the electric push rod 308 according to the inclination angle of the foundation pit side slope, so that the inclination angle of the slope protection plate 307 is adapted to the inclination angle of the foundation pit side slope, thereby facilitating better support and protection of the foundation pit side slope.

[0044] In some embodiments, such as Figure 4 As shown, the output component includes a servo motor 205 and a circular shaft 206. The side wall of the baffle 201 is fixedly connected to the servo motor 205. The output end of the servo motor 205 is connected to the circular shaft 206 via a coupling. The circular shaft 206 is connected to the bidirectional screw rod 203 via a first transmission component. The first transmission component can drive the bidirectional screw rods 203 on both sides to rotate in the same direction under the drive of the servo motor 205.

[0045] Further, such as Figure 6 As shown, the first transmission component includes a main pulley 207, a secondary pulley 204 and a transmission belt 208. The outer wall of the circular shaft 206 is provided with a main pulley 207, and the middle part of the two-way screw rods 203 on both sides is provided with a secondary pulley 204. The main pulley 207 and the two secondary pulleys 204 are connected by the transmission belt 208. In this embodiment, the outer diameter of the main pulley 207 is larger than the outer diameter of the secondary pulley 204.

[0046] Furthermore, the output assembly is connected to the reinforcement assembly via the second transmission assembly, and the reinforcement assembly can extend into the soil at the bottom of the device under the drive of the output assembly.

[0047] Furthermore, the second transmission component includes a first bevel gear 209, a second bevel gear 210, a bearing 211 and a shaft rod 212, the reinforcement component includes a hydraulic rod 213, a tip rod and a spiral piece 214, the outer wall of the end of the circular shaft 206 is sleeved with the first bevel gear 209, a mounting hole is opened on the base plate 101, and the shaft rod 212 is rotatably connected in the mounting hole via the bearing 211, the top of the shaft rod 212 is provided with a second bevel gear 210 that meshes with the first bevel gear 209, the bottom of the shaft rod 212 is connected to the tip rod via the hydraulic rod 213, and the outer wall of the tip rod is connected to the spiral piece 214.

[0048] When the staff uses the driving mechanism 200 to drive the foundation pit support mechanism 300 to move, the servo motor 205 is first started, and the servo motor 205 drives the round shaft 206 and the main pulley 207 to rotate. The main pulley 207 drives the auxiliary pulleys 204 on both sides to rotate through the transmission belt 208, and the auxiliary pulleys 204 synchronously drive the corresponding bidirectional screw rods 203 to rotate, thereby driving the first connecting plate 105 to move, so that the foundation pit support mechanism 300 further supports the side slope of the foundation pit;

[0049] During this process, when the servo motor 205 drives the circular shaft 206 to rotate, it synchronously drives the first helical gear 209 to rotate. Due to the meshing effect between the first helical gear 209 and the second helical gear 210, the first helical gear 209 drives the second helical gear 210 to rotate, further driving the hydraulic rod 213 to lower and rotate the spiral blade 214 into the soil layer, facilitating the support of the foundation pit side slope while enhancing the overall stability of the device.

[0050] The above are all the preferred embodiments of the present invention, and the protection scope of the present invention is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A safety protection device for municipal road maintenance foundation pit, characterized in that: include: A base support mechanism (100) comprises a base plate (101), a vertical plate (102), a slot plate (302) and a first movable component, wherein the two sides of the base plate (101) are correspondingly connected to the vertical plates (102), the side walls of the vertical plates (102) are correspondingly connected to the first movable component, the two ends of the base plate (101) are provided with symmetrically arranged slot plates (302), the two ends of the slot plates (302) are respectively correspondingly connected to the first movable components on the two sides, and the first movable component can drive the slot plates (302) to move axially along the vertical plates (102); The foundation pit support mechanism (300) comprises an angle adjustment component and a slope protection plate (307), wherein the groove plates (302) at both ends are connected to the slope protection plates (307) via the angle adjustment component, and the angle adjustment component is used to adjust the support angle of the slope protection plate (307) to adapt to the inclination angle of the foundation pit side slope; The driving mechanism (200) comprises an output assembly and a first transmission assembly, wherein a baffle (201) is connected between the vertical plates (102) at both sides, the output assembly is arranged on the baffle (201), the output assembly is transmission-connected to the first moving assembly via the first transmission assembly, and the output assembly can control the slot plates (302) at both ends to move towards or away from each other.

2. A safety protection device for municipal road maintenance foundation pit according to claim 1, characterized in that: The first moving assembly comprises a bidirectional screw rod (203), a guide block (202), a first guide rail (103), a first slider (104) and a first connecting plate (105); the outer wall surface of the vertical plate (102) is connected to the first guide rail (103); two first sliders (104) are slidably connected to the first guide rail (103); the first slider (104) is connected to the first connecting plate (105); the outer side of the first connecting plate (105) is connected to the end portion corresponding to the slot plate (302) via an L-shaped frame rod (301); the inner side of the first connecting plate (105) is connected to the guide block (202); the two guide blocks (202) penetrate and are threadedly connected to the bidirectional screw rod (203); the bidirectional screw rod (203) is transmission-connected to the first transmission assembly.

3. A safety protection device for municipal road maintenance foundation pit according to claim 2, characterized in that: The output assembly comprises a servo motor (205) and a circular shaft (206); the servo motor (205) is fixedly connected to the side wall of the baffle (201); the output end of the servo motor (205) is connected to the circular shaft (206) via a coupling; the circular shaft (206) is transmission-connected to the bidirectional lead screw (203) via the first transmission assembly; the first transmission assembly can drive the bidirectional lead screws (203) on both sides to rotate in the same direction under the drive of the servo motor (205).

4. A safety protection device for municipal road maintenance foundation pit according to claim 3, characterized in that: The first transmission component comprises a main pulley (207), a secondary pulley (204) and a transmission belt (208); the main pulley (207) is sleeved on the outer wall of the circular shaft (206); the secondary pulleys (204) are sleeved on the middle parts of the bidirectional screw rods (203) on both sides; the main pulley (207) and the secondary pulley (204) are connected to each other via the transmission belt (208).

5. A safety protection device for municipal road maintenance foundation pit according to claim 3, characterized in that: The output assembly is connected to a reinforcement assembly via a second transmission assembly, and the reinforcement assembly can extend into the soil at the bottom of the device under the drive of the output assembly.

6. A safety protection device for municipal road maintenance foundation pit according to claim 5, characterized in that: The second transmission assembly comprises a first bevel gear (209), a second bevel gear (210), a bearing (211) and a shaft rod (212); the reinforcement assembly comprises a hydraulic rod (213), a tip rod and a spiral sheet (214); the first bevel gear (209) is sleeved on the outer wall of the end of the circular shaft (206); a mounting hole is provided on the base plate (101); the shaft rod (212) is rotatably connected in the mounting hole via the bearing (211); the second bevel gear (210) meshing with the first bevel gear (209) is provided at the top of the shaft rod (212); the tip rod is connected to the bottom of the shaft rod (212) via the hydraulic rod (213); and the spiral sheet (214) is connected to the outer wall of the tip rod.

7. A safety protection device for municipal road maintenance foundation pit according to claim 2, characterized in that: The outer side wall of the first connecting plate (105) is connected to the L-shaped frame rod (301) via a second movable assembly, the second movable assembly is connected to a guide assembly, the second movable assembly can drive the L-shaped frame rod (301) to move in a vertical direction, and the guide assembly can adjust the movement path of the L-shaped frame rod (301).

8. A safety protection device for municipal road maintenance foundation pit according to claim 7, characterized in that: The second moving component comprises a second guide rail (106), a second slider (107) and a second connecting plate (108); the guiding component comprises a connecting shaft (110), a roller (111) and a groove rail (109); the outer side of the first connecting plate (105) is connected to the second guide rail (106) arranged in a vertical direction; the second guide rail (106) is slidably connected to the second slider (107); the second slider (107) is connected to the second connecting plate (108); the top of the second connecting plate (108) is connected to the end of the groove plate (302) via the L-shaped frame rod (301); the groove rail (109) is in a W-shaped structure and is arranged on the base plate (101); the side wall of the second connecting plate (108) is connected to the roller (111) via the connecting shaft (110); the roller (111) is movably connected to the cavity of the groove rail (109).

9. A safety protection device for municipal road maintenance foundation pit according to claim 1, characterized in that: The angle adjustment assembly comprises a plate (306) and an electric push rod (308); the top of the slot plate (302) is connected to the top of the slope protection plate (307) via the hinged electric push rod (308); and the bottom of the slot plate (302) is rotatably connected to the bottom of the slope protection plate (307) via the plate (306).

10. A safety protection device for municipal road maintenance foundation pit according to claim 9, characterized in that: An unfolding assembly is provided between the slot plate (302) and the angle adjustment assembly, the unfolding assembly comprising a telescopic frame (303), a front plate (304) and a hydraulic rod (305); the telescopic frame (303) and the hydraulic rod (305) are movably connected between the slot plate (302) and the front plate (304); the top of the front plate (304) is movably connected to the top of the slope protection plate (307) via the electric push rod (308); and the bottom of the front plate (304) is movably connected to the bottom of the slope protection plate (307) via the sheet plate (306).

Images