Foundation excavating device for road construction

Abstract

The invention belongs to the technical field of road construction, and provides a road construction foundation excavating device which comprises a bottom plate, self-locking rollers are fixedly mounted on the lower surface of the bottom plate, a lifting assembly and a collecting assembly are arranged on the upper surface of the bottom plate, the lifting assembly is connected with an excavating assembly, and the bottom plate is connected with a conveying assembly; the conveying assembly comprises a first supporting frame fixedly arranged on the upper surface of the bottom plate, the first supporting frame is rotationally connected with a driving roller, the lower surface of the bottom plate is fixedly connected with a second supporting frame, the second supporting frame is connected with a movable roller, and the driving roller and the movable roller are connected with a conveying belt. The conveying motor drives the driving roller to rotate, then the driving roller drives the conveying belt and the movable roller to rotate, the rotating conveying belt can convey sundries excavated by the excavator bucket into the collecting bucket for temporary storage, due to the fact that the sundries are treated, a construction site is not blocked any more, and meanwhile the problem that the workload is increased due to the fact that the sundries slide into a pit is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of road construction, and specifically relates to a road construction foundation excavation device. Background Art

[0002] Road construction foundation excavation is the starting step of road construction. It mainly excavates the roadbed and the space for laying underground facilities, which can provide stable support for the road, ensure a reasonable drainage system, and enable the road to adapt to terrain changes.

[0003] When carrying out road construction foundation excavation, the excavated soil, vegetation and other sundries are piled up beside the pit, which not only affects the trafficability of the road surface, but also needs to be processed later. Moreover, the sundries piled up beside the pit are very likely to slide back into the pit again, resulting in workers having to clean repeatedly, which increases the workload of the workers.

[0004] Therefore, those skilled in the art have proposed a road construction foundation excavation device to solve the problems raised in the background art. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a road construction foundation excavation device to solve the problems that in the prior art, during road construction foundation excavation, the excavated sundries are piled up at the construction site, affecting the site environment, and are likely to slide, resulting in an increased workload.

[0006] A road construction foundation excavation device includes a bottom plate. A self-locking roller is fixedly installed on the lower surface of the bottom plate. A lifting assembly and a collection assembly are arranged on the upper surface of the bottom plate. The lifting assembly is connected with an excavation assembly, and the bottom plate is connected with a transportation assembly;

[0007] The transportation assembly includes a first support frame fixedly arranged on the upper surface of the bottom plate. A driving roller is rotatably connected to the first support frame. A second support frame is fixedly connected to the lower surface of the bottom plate. The second support frame is connected with a movable roller. The driving roller and the movable roller are connected with a conveyor belt. A plurality of convex strips are arranged on the outer surface of the conveyor belt. A transportation motor is fixedly installed on the first support frame, and the output end of the transportation motor is fixedly connected with the driving roller.

[0008] Preferably, the transportation assembly further includes an electric push rod fixedly arranged on the lower surface of the bottom plate. The telescopic end of the electric push rod is fixedly connected with a lifting sleeve. An activity groove is formed in the lifting sleeve. A lifting rod is movably connected in the activity groove. The lifting rod is fixedly connected with the movable roller. The movable roller is connected with a bearing. An arc-shaped groove is formed in the second support frame. The bearing is in sliding fit with the sliding rod of the arc-shaped groove.

[0009] Preferably, the second support frame is an arc-shaped plate, and the arc-shaped groove is an arc-shaped slot.

[0010] Preferably, the lifting assembly includes a lifting column fixedly connected to the upper surface of the bottom plate. The lifting column is provided with a lifting cavity, and a threaded rod is rotatably connected to the lifting cavity. A lifting motor is fixedly installed on the upper surface of the lifting column, and the output end of the lifting motor is fixedly connected to the threaded rod. The threaded rod is threadedly connected to a lifting plate, and the lifting plate is slidably connected to the lifting cavity.

[0011] Preferably, the excavation assembly includes a mounting plate fixedly connected to the lifting plate. A digging motor is fixedly installed on the mounting plate, and the output end of the digging motor is fixedly connected to a driving wheel. The driving wheel is connected to a belt, and the driving wheel is connected to an auxiliary wheel through the belt. The auxiliary wheel is fixedly connected to a rotating cylinder, and a plurality of digging buckets are fixedly installed on the peripheral side of the rotating cylinder. The mounting plate is fixedly connected to a third support frame, and the third support frame is rotatably connected to the rotating cylinder.

[0012] Preferably, the mounting plate is an "L"-shaped plate. A reinforcing rod is connected between the horizontal plate and the vertical plate of the mounting plate. A through groove is provided on the horizontal plate of the mounting plate, and the belt passes through the through groove. The diameter of the driving wheel is smaller than that of the auxiliary wheel.

[0013] Preferably, a baffle is fixedly installed at the lower end of the lifting cavity. The lifting plate is integrally formed by a horizontal plate and a bent plate, and the bent plate is an "L"-shaped plate.

[0014] Preferably, the collection assembly includes a collection hopper arranged on the upper surface of the bottom plate. A push-pull rod is slidably connected to the collection hopper. One end of the push-pull rod is fixedly connected to a push-pull plate, and the other end of the push-pull rod is fixedly connected to a soil pushing plate.

[0015] Preferably, the soil pushing plate is located inside the collection hopper, and a through groove is provided on the soil pushing plate.

[0016] Preferably, a shielding frame is fixedly installed on the upper surface of the bottom plate. A shielding curtain is arranged on the shielding frame, and a handle is fixedly installed on the shielding frame.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In the present invention, the transportation motor drives the driving roller to rotate, and then the driving roller drives the conveyor belt and the movable roller to rotate. The rotating conveyor belt can transport the sundries dug out by the digging bucket into the collection hopper for temporary storage. Since the sundries are processed, the construction site is no longer blocked, and at the same time, the problem that the sundries slide into the pit and increase the workload is avoided.

[0019] 2. The present invention changes the height of the lifting sleeve through an electric push rod. At this time, the lifting sleeve adjusts the height of the lifting rod and the movable roller through the movable groove. By adjusting the height of the movable roller, the inclination degree of the conveyor belt can be changed according to the excavated materials. When transporting sundries with small friction such as stones and vegetation, the inclination angle of the conveyor belt is adjusted to be small to avoid material dropping. When transporting sundries with large viscosity such as soil, the inclination angle of the conveyor belt is adjusted to be large to increase the conveying speed. Adjusting the conveyor belt to be flatter can also improve the passability of the device and facilitate movement.

[0020] 3. In the present invention, the materials just fed into the collecting hopper by the conveyor belt are stacked in a tower shape. By operating the push-pull plate to drive the push rod and the earth-pushing plate to move, the sundries in the collecting hopper can be leveled, thereby improving the utilization rate of the space in the collecting hopper. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is an overall schematic diagram of a road construction foundation excavation device;

[0022] Figure 2 is a front view of a road construction foundation excavation device;

[0023] Figure 3 is a schematic diagram of a transport component of a road construction foundation excavation device;

[0024] Figure 4 is a cross-sectional view of a lifting component of a road construction foundation excavation device;

[0025] Figure 5 is a schematic diagram of an excavation component of a road construction foundation excavation device;

[0026] Figure 6 is a schematic diagram of a collecting component of a road construction foundation excavation device.

[0027] In the figure:

[0028] 1. Bottom plate; 2. Self-locking roller; 3. Lifting assembly; 301. Lifting column; 302. Lifting cavity; 303. Threaded rod; 304. Lifting motor; 305. Lifting plate; 4. Collection assembly; 401. Collection hopper; 402. Push-pull rod; 403. Push-pull plate; 404. Earth-pushing plate; 5. Excavation assembly; 501. Mounting plate; 502. Excavation motor; 503. Driving wheel; 504. Belt; 505. Auxiliary wheel; 506. Rotating cylinder; 507. Bucket; 508. Third support frame; 6. Transportation assembly; 601. First support frame; 602. Driving roller; 603. Second support frame; 604. Movable roller; 605. Conveyor belt; 606. Rib; 607. Transportation motor; 608. Electric push rod; 609. Lifting sleeve; 610. Movable groove; 611. Lifting rod; 612. Bearing; 613. Slide groove; 7. Baffle; 8. Shielding frame; 9. Handle. Specific embodiments

[0029] The following further describes in detail the embodiments of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0030] Embodiment 1

[0031] As shown in the attached Figure 1 to the attached Figure 3 figures, this embodiment provides a road construction foundation excavation device, including a bottom plate 1. The bottom plate 1 is used to provide space and support for the installation of other parts. A self-locking roller 2 is fixedly installed on the lower surface of the bottom plate 1. The self-locking roller 2 enables the device to move. A lifting assembly 3 and a collection assembly 4 are arranged on the upper surface of the bottom plate 1. The collection assembly 4 is used to temporarily store the sundries generated by excavation. The lifting assembly 3 is connected to an excavation assembly 5. The lifting assembly 3 and the excavation assembly 5 are used in cooperation. The lifting assembly 3 can adjust the height of the excavation assembly 5, and thus adjust the excavation depth of the excavation assembly 5. The bottom plate 1 is connected to a transportation assembly 6. The transportation assembly 6 is used to transport the sundries generated by the excavation of the excavation assembly 5 into the collection assembly 4;

[0032] The transport component 6 includes a first support frame 601 fixedly arranged on the upper surface of the bottom plate 1. The first support frame 601 is rotatably connected with a driving roller 602. The first support frame 601 mounts the driving roller 602 at a certain height. The lower surface of the bottom plate 1 is fixedly connected with a second support frame 603. The second support frame 603 is connected with a movable roller 604. The second support frame 603 provides support for the installation of the movable roller 604. The driving roller 602 and the movable roller 604 are connected with a conveyor belt 605. When the driving roller 602 rotates, the conveyor belt 605 is driven to rotate through friction, and at the same time, the movable roller 604 is driven to rotate. The movable roller 604 assists the conveyor belt 605 to rotate. The bottom plate 1 is provided with a passage groove. The conveyor belt 605 passes through the passage groove and extends from above the bottom plate 1 to below the bottom plate 1. A plurality of convex strips 606 are arranged on the outer surface of the conveyor belt 605. The convex strips 606 intercept sundries, and can prevent the sundries from falling from the inclined conveyor belt 605. The first support frame 601 is fixedly installed with a transport motor 607. The output end of the transport motor 607 is fixedly connected with the driving roller 602. The transport motor 607 is the power source. When the transport motor 607 works, the driving roller 602 is driven to rotate.

[0033] Specifically, the transport component 6 further includes an electric push rod 608 fixedly arranged on the lower surface of the bottom plate 1. The telescopic end of the electric push rod 608 is fixedly connected with a lifting sleeve 609. When the electric push rod 608 extends and retracts, the height of the lifting sleeve 609 changes. The lifting sleeve 609 is provided with a movable groove 610. A lifting rod 611 is movably connected in the movable groove 610. When the lifting sleeve 609 rises or falls, the height of the lifting rod 611 in the movable groove 610 also changes. The lifting rod 611 is fixedly connected with the movable roller 604. The height of the movable roller 604 and the height of the lifting rod 611 change synchronously. The movable roller 604 is connected with a bearing 612. The second support frame 603 is provided with a sliding groove 613. The bearing 612 is in sliding fit with the sliding rod of the sliding groove 613. When the height of the lifting rod 611 changes, the bearing 612 slides in the sliding groove, and at the same time, the bearing 612 slides in the sliding groove, so that the lifting rod 611 moves in the movable groove 610.

[0034] Furthermore, the second support frame 603 is an arc-shaped plate, and the sliding groove 613 is an arc-shaped groove. The centers of the second support frame 603 and the sliding groove 613 overlap with the driving roller 602. The movable roller 604 and the conveyor belt 605 rotate with the driving roller 602 as the axis, and the inclination degree of the conveyor belt 605 can be adjusted.

[0035] As can be seen from the above, the device moves through the self-locking rollers 2. During the movement, the excavation component 5 performs excavation work. The excavation depth of the excavation component 5 is adjusted through the lifting component 3 according to the on-site conditions. The sundries generated by the excavation of the excavation component 5 fall on the inclined conveyor belt 605. The conveyor motor 607 drives the driving roller 602 to rotate. The driving roller 602 drives the conveyor belt 605 to rotate through friction, and at the same time drives the movable roller 604 to rotate. The movable roller 604 assists the conveyor belt 605 to rotate. The rotating conveyor belt 605 conveys the sundries into the collection component 4 for temporary storage. The convex strips 606 have an intercepting effect on the sundries, which can prevent the sundries from falling off the conveyor belt 605.

[0036] The user can adjust the inclination angle of the conveyor belt 605 according to data such as the viscosity and friction of the sundries. The height of the lifting sleeve 609 is changed by the telescopic movement of the electric push rod 608. The lifting rod 611 in the movable groove 610 rises and falls together with the lifting sleeve 609. Since the lifting rod 611 is fixedly connected to the movable roller 604, the lifting rod 611 drives the movable roller 604 to rise and fall together. During the lifting and lowering of the movable roller 604, the bearing 612 slides in the chute 613. Since the chute 613 is an arc-shaped groove, when the bearing 612 changes in the vertical direction, it will also change in the horizontal direction, causing the lifting rod 611 to move in the movable groove 610, changing the position of the movable roller 604, and thus changing the inclination degree of the conveyor belt 605. When transporting sundries with small friction such as stones and vegetation, the inclination angle of the conveyor belt 605 is adjusted to be smaller to prevent the materials from falling. When transporting sundries with large viscosity such as soil, the inclination angle of the conveyor belt 605 is adjusted to be larger to increase the conveying speed; when the conveyor belt 605 is adjusted to be flatter and the height of the movable roller 604 rises, the passability of the device can also be improved, facilitating movement.

[0037] Embodiment 2

[0038] As shown in the append Figure 1 ix to the append Figure 3 ix, this embodiment is basically the same as the previous embodiment. The difference is that the lifting component 3 includes a lifting column 301 fixedly connected to the upper surface of the bottom plate 1. The lifting column 301 is provided with a lifting cavity 302. A threaded rod 303 is rotatably connected to the lifting cavity 302. A lifting motor 304 is fixedly installed on the upper surface of the lifting column 301. When the lifting motor 304 works, it drives the threaded rod 303 to rotate. The output end of the lifting motor 304 is fixedly connected to the threaded rod 303. The threaded rod 303 is threadedly connected to a lifting plate 305. The lifting plate 305 is slidably connected to the lifting cavity 302. When the threaded rod 303 rotates, the lifting plate 305 moves along the length direction of the lifting cavity 302 under the influence of the thread.

[0039] Specifically, the excavation component 5 includes a mounting plate 501 fixedly connected to the lifting plate 305. The bottom plate 1 is provided with a groove for the excavation component 5 to pass through in the area directly below the excavation component 5. When the lifting plate 305 moves along the length direction of the lifting cavity 302, the height of the mounting plate 501 will change, thereby adjusting the excavation depth of the excavation component 5. The mounting plate 501 is fixedly installed with an excavation motor 502. The output end of the excavation motor 502 is fixedly connected to a driving wheel 503. The driving wheel 503 is connected to a belt 504. The driving wheel 503 is connected to an auxiliary wheel 505 through the belt 504. When the excavation motor 502 works, it drives the driving wheel 503 to rotate. The driving wheel 503 drives the auxiliary wheel 505 to rotate through the belt 504. The auxiliary wheel 505 is fixedly connected to a rotating cylinder 506. A number of digging buckets 507 are fixedly installed on the circumferential side of the rotating cylinder 506. The auxiliary wheel 505 drives the rotating cylinder 506 to rotate clockwise, and the digging buckets 507 perform the excavation work. The mounting plate 501 is fixedly connected to a third support frame 508. The third support frame 508 is rotatably connected to the rotating cylinder 506. The third support frame 508 provides support for the rotating cylinder 506.

[0040] Furthermore, the mounting plate 501 is an "L"-shaped plate. The horizontal plate and the vertical plate of the mounting plate 501 are connected with strengthening rods, which can improve the strength of the mounting plate 501. The horizontal plate of the mounting plate 501 is provided with a through groove, and the belt 504 passes through the through groove. The diameter of the driving wheel 503 is smaller than that of the auxiliary wheel 505, which can increase the torque. The vertical plate of the mounting plate 501 is attached to the side surface of the lifting column 301. During excavation, the lifting column 301 can bear a part of the reaction force generated by excavation, thereby extending the service life of the device.

[0041] Furthermore, a baffle 7 is fixedly installed at the lower end of the lifting cavity 302. By setting the baffle 7, it can prevent the digging buckets 507 from throwing sundries into the lifting cavity 302. The lifting plate 305 is integrally formed by a horizontal plate and a bent plate. The bent plate is an "L"-shaped plate. By the special shape of the lifting plate 305, the movement interference between the lifting plate 305 and the baffle 7 can be avoided.

[0042] As can be seen from the above, the lifting motor 304 drives the threaded rod 303 to rotate. Affected by the thread, the lifting plate 305 will move along the length direction of the lifting cavity 302, thereby adjusting the excavation depth of the digging buckets 507. The excavation motor 502 works to drive the driving wheel 503 to rotate. The driving wheel 503 drives the auxiliary wheel 505 to rotate through the belt 504. The auxiliary wheel 505 drives the rotating cylinder 506 to rotate clockwise, and the digging buckets 507 perform the excavation work. During excavation, the mounting plate 501 transmits the reaction force generated by excavation to the lifting column 301, and the lifting column 301 shares a part of the reaction force. When the digging buckets 507 rotate from the highest point to the horizontal position, they throw the sundries onto the conveyor belt 605, and the conveyor belt 605 sends the sundries into the collection hopper 401.

[0043] Example 3

[0044] As shown in the attached Figure 1 to the attached Figure 6 As shown, this embodiment is basically the same as the previous embodiment. The difference is that the collection component 4 includes a collection hopper 401 disposed on the upper surface of the bottom plate 1. The conveyor belt 605 transports sundries into the collection hopper 401 for temporary storage. Later, it can be backfilled or transported to other areas for centralized storage. The collection hopper 401 is slidably connected to a push-pull rod 402. One end of the push-pull rod 402 is fixedly connected to a push-pull plate 403, and the other end of the push-pull rod 402 is fixedly connected to a soil pushing plate 404. By operating the push-pull plate 403 to drive the push-pull rod 402 and the soil pushing plate 404 to move, the sundries in the collection hopper 401 can be leveled, thereby improving the utilization rate of the space in the collection hopper 401.

[0045] Specifically, the soil pushing plate 404 is located inside the collection hopper 401. The soil pushing plate 404 is provided with a through groove, and sundries can pass through the through groove, thereby reducing the moving resistance of the soil pushing plate 404 and reducing the working intensity.

[0046] Furthermore, a shielding frame 8 is fixedly installed on the upper surface of the bottom plate 1. Except for the side not provided with a shielding curtain in the direction close to the conveyor belt 605, shielding curtains are provided on the other surfaces. The shielding curtains can shield the floating dust generated during the transportation of the conveyor belt 605. A handle 9 is fixedly installed on the shielding frame 8 to facilitate controlling the moving direction of the device.

[0047] As can be seen from the above, by controlling the moving direction of the device through the handle 9, the device is moved to the working area. The excavation component 5 performs excavation work. The excavation depth of the excavation component 5 is adjusted through the lifting component 3 according to the on-site situation. The transportation component 6 transports the waste generated by excavation into the collection hopper 401. The waste accumulates in a tower shape, resulting in low utilization rate of the capacity inside the collection hopper 401. The shielding curtains can shield the floating dust generated during the transportation of the conveyor belt 605. By operating the push-pull plate 403 to drive the push-pull rod 402 and the soil pushing plate 404 to move, the sundries in the collection hopper 401 can be leveled, thereby improving the utilization rate of the space in the collection hopper 401.

[0048] The standard parts used in the present invention can all be purchased from the market. The special-shaped parts can be customized according to the descriptions in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machines, parts, and equipment all adopt conventional models in the prior art. Coupled with the circuit connection adopting the conventional connection method in the prior art, details are not described herein. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0049] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. The meaning of "a plurality" is two or more, unless specifically and clearly defined otherwise.

[0050] In the present invention, unless otherwise clearly defined and limited, terms such as "installed", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0052] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0053] In the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved, and other structures may refer to the general design. Without conflict, the same embodiment and different embodiments of the present invention may be combined with each other.

[0054] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A road construction foundation excavation device, characterized in that: It comprises a base plate (1), a self-locking roller (2) is fixedly mounted on the lower surface of the base plate (1), a lifting assembly (3) and a collecting assembly (4) are arranged on the upper surface of the base plate (1), the lifting assembly (3) is connected to a digging assembly (5), and the base plate (1) is connected to a transport assembly (6); The transport component (6) comprises a first support frame (601) fixedly arranged on the upper surface of the base plate (1), the first support frame (601) being rotatably connected to an active roller (602), the lower surface of the base plate (1) being fixedly connected to a second support frame (603), the second support frame (603) being connected to an active roller (604), the active roller (602) and the active roller (604) being connected to a transport belt (605), the outer surface of the transport belt (605) being provided with a plurality of convex strips (606), the first support frame (601) being fixedly installed with a transport motor (607), the output end of the transport motor (607) being fixedly connected to the active roller (602).

2. A road construction foundation excavation device as claimed in claim 1, characterized in that: The transport component (6) also includes an electric push rod (608) fixedly mounted on the lower surface of the base plate (1), the telescopic end of the electric push rod (608) is fixedly connected to a lifting sleeve (609), the lifting sleeve (609) is provided with a movable groove (610), a lifting rod (611) is movably connected in the movable groove (610), the lifting rod (611) is fixedly connected to a movable roller (604), the movable roller (604) is connected to a bearing (612), the second support frame (603) is provided with a slide groove (613), the bearing (612) cooperates with the slide groove (613) sliding rod.

3. A road construction foundation excavation device as claimed in claim 2, characterized in that: The second support frame (603) is an arc-shaped plate, and the sliding groove (613) is an arc-shaped groove.

4. A road construction foundation excavation device as claimed in claim 3, characterized in that: The lifting assembly (3) comprises a lifting column (301) fixedly connected to the upper surface of the base plate (1); the lifting column (301) is provided with a lifting chamber (302); the lifting chamber (302) is rotatably connected to a threaded rod (303); a lifting motor (304) is fixedly installed on the upper surface of the lifting column (301); the output end of the lifting motor (304) is fixedly connected to the threaded rod (303); the threaded rod (303) is threadedly connected to a lifting plate (305); and the lifting plate (305) is slidably connected to the lifting chamber (302).

5. A road construction foundation excavation device as claimed in claim 4, characterized in that: The excavation assembly (5) comprises a mounting plate (501) fixedly connected to the lifting plate (305), the mounting plate (501) being fixedly mounted with an excavation motor (502), the output end of the excavation motor (502) being fixedly connected with a driving wheel (503), the driving wheel (503) being connected with a belt (504), the driving wheel (503) being connected with an auxiliary wheel (505) via the belt (504), the auxiliary wheel (505) being fixedly connected with a rotating cylinder (506), a plurality of buckets (507) being fixedly mounted on the circumference of the rotating cylinder (506), the mounting plate (501) being fixedly connected with a third support frame (508), the third support frame (508) being rotationally connected with the rotating cylinder (506).

6. A road construction foundation excavation device as claimed in claim 5, characterized in that: The mounting plate (501) is an "L"-shaped plate, the horizontal plate and the vertical plate of the mounting plate (501) are connected with a reinforcing rod, the horizontal plate of the mounting plate (501) is provided with a through slot, the belt (504) passes through the through slot, and the diameter of the driving wheel (503) is smaller than the diameter of the auxiliary wheel (505).

7. A road construction foundation excavation device as claimed in claim 6, characterized in that: A baffle (7) is fixedly mounted at the lower end of the lifting chamber (302); the lifting plate (305) is composed of a horizontal plate and a bent plate integrally formed; and the bent plate is an "L"-shaped plate.

8. A road construction foundation excavation device as claimed in claim 7, characterized in that: The collecting assembly (4) comprises a collecting bucket (401) arranged on the upper surface of the base plate (1); the collecting bucket (401) is slidably connected to a push-pull rod (402); one end of the push-pull rod (402) is fixedly connected to a push-pull plate (403); and the other end of the push-pull rod (402) is fixedly connected to a bulldozer plate (404).

9. A road construction foundation excavation device as claimed in claim 8, characterized in that: The bulldozer (404) is located in the collecting bucket (401), and a through groove is formed in the bulldozer (404).

10. A road construction foundation excavation device as claimed in claim 9, characterized in that: A shielding frame (8) is fixedly mounted on the upper surface of the base plate (1), the shielding frame (8) is provided with a shielding curtain, and a handle (9) is fixedly mounted on the shielding frame (8).

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