A trenching apparatus for road construction

Abstract

The application discloses a trench excavating device for road construction, which comprises a vehicle body and a trench excavating mechanism installed on the vehicle body. The trench excavating mechanism comprises a supporting assembly, which comprises a first mounting frame installed on the front end of the vehicle body in a liftable manner. The cutting assembly comprises a first rotating shaft, a plurality of cutterheads and a rotating driving mechanism. The first rotating shaft is rotatably installed between two vertical connecting arms, and the plurality of cutterheads are fixedly installed on the first rotating shaft in a longitudinal direction. The rotating driving mechanism is installed on the first mounting frame and is used for driving the first rotating shaft to rotate, so that the plurality of cutterheads are driven to rotate to cut the road surface. A set of knocking assemblies is arranged between every two adjacent cutterheads, and the knocking assemblies are used for repeatedly knocking the road surface between the two adjacent cutterheads in a vertical direction. The cutting assembly and the knocking assembly are arranged, so that relatively large cement blocks can be quickly knocked into pieces, and the breaking efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of road construction, in particular to a trench excavation device for road construction. BACKGROUND

[0002] Road engineering refers to the whole process of planning, design, construction, maintenance and management of roads and the engineering entities engaged in it. Like other types of civil engineering, road engineering has obvious technical, economic and management characteristics. The excavator is a commonly used trench excavation device for municipal road construction.

[0003] In related technologies, the invention with the application number CN202210265972.8 discloses a trench excavation device for municipal road construction, which comprises a support frame, a cab, a hatch, a track, etc. The support frame is rotatably provided with a track on both sides. The upper side of the support frame is connected with the cab, and the upper right side of the cab is connected with a transparent glass. The noise reduction plate can reduce the noise generated by the electric digging wheel during operation, avoid the influence of white noise on the life of urban residents, and also avoid the splashing of sand and gravel on the ground to protect pedestrians and vehicles. The collection frame can collect the excavated sand and gravel, which facilitates the cleaning operation of the operator. When in use, the breaker is started to make contact with the ground. The vibration of the breaker can break the hard stones and cement on the ground, but the breaking efficiency is low. SUMMARY

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the purpose of the present application is to provide a trench excavation device for road construction, which is provided with a cutting assembly and a knocking assembly. During the movement of the vehicle body, the cutting assembly first rotates to cut the hard cement ground on the ground, which is conducive to cutting the hard cement ground on the road surface. During the cutting process, the entire road surface is cut and divided into multiple sub-road surface areas by multiple cutters, which reduces the overall connection strength of the road surface. Then, each group of knocking assemblies repeatedly knocks the sub-road surface area in the vertical direction, which can quickly break the relatively large cement blocks and greatly improve the breaking efficiency.

[0005] The purpose of the present application is achieved by adopting the following technical solutions:

[0006] The first aspect of the present application provides a trench excavation device for road construction, comprising a vehicle body and a trench excavation mechanism installed on the vehicle body; the trench excavation mechanism comprises:

[0007] A support assembly comprises a first mounting frame which is mounted on the front end of the vehicle body in a liftable manner; the first mounting frame comprises two transversely extending arms, two vertically extending arms and a longitudinally connecting arm; the two transversely extending arms are arranged in parallel along the transverse direction at the front end of the vehicle body, and the first ends of the transversely extending arms are mounted on the vehicle body in a liftable manner, and the second ends of the transversely extending arms extend outwardly along the transverse direction; the longitudinally connecting arm is fixedly connected with the two transversely extending arms at the two ends thereof, and the two vertically extending arms are fixedly mounted on the bottom surface of the longitudinally connecting arm in parallel along the vertical direction;

[0008] A cutting assembly comprises a first rotating shaft, a plurality of cutter discs and a rotating driving mechanism; the first rotating shaft is rotatably mounted between the two vertically extending arms, and the plurality of cutter discs are fixedly mounted on the first rotating shaft in a longitudinal direction; the rotating driving mechanism is mounted on the first mounting frame, and the rotating driving mechanism is used to drive the first rotating shaft to rotate, so that the plurality of cutter discs are driven to rotate by the first rotating shaft, thereby achieving the cutting of the road surface;

[0009] A plurality of knocking assemblies are arranged between every two adjacent cutter discs, and the knocking assemblies are used to repeatedly knock the road surface between the two adjacent cutter discs along the vertical direction.

[0010] In the first aspect of the present application, as an optional embodiment, the knocking assembly comprises an L-shaped fixing frame, a knocking piece, a return spring and a cam;

[0011] The L-shaped fixing frame comprises a vertical connecting portion and a transverse connecting portion which is fixedly connected with the lower end of the vertical connecting portion; the upper end of the vertical connecting portion is fixedly mounted on the bottom surface of the longitudinally connecting arm, and the transverse connecting portion extends to between every two adjacent cutter discs; a guide hole is arranged on the transverse connecting portion;

[0012] The knocking piece comprises a sliding rod, the upper end of the sliding rod is fixedly mounted with a pressing plate, and the lower end of the sliding rod is formed with a sharp head; the sharp head of the sliding rod extends downwardly through the guide hole;

[0013] The return spring is sleeved on the sliding rod, the upper end of the return spring is fixedly connected with the bottom surface of the pressing plate, and the lower end of the return spring is fixedly connected with the upper surface of the transverse connecting portion;

[0014] The cam is fixedly mounted on the first rotating shaft, and the cam has a pressing portion with a gradually decreasing radius; the cam is driven to rotate by the first rotating shaft, so that the pressing portion can press against or be separated from the pressing plate.

[0015] In the first aspect of the present application, as an optional embodiment, the rotating driving mechanism comprises a first motor, a first driving bevel gear and a first driven bevel gear; the first motor is fixedly installed on the transversely extending arm, the first driving bevel gear is fixedly installed on an output shaft of the first motor, and the first driven bevel gear is fixedly installed on one end of the first rotating shaft; the first driving bevel gear and the first driven bevel gear are in engagement with each other; the first motor drives the first driving bevel gear to rotate, the first driving bevel gear drives the first driven bevel gear to rotate, and the first driven bevel gear drives the first rotating shaft to rotate.

[0016] In the first aspect of the present application, as an optional embodiment, a shearing mechanism is further included, which is installed on the mounting frame in a liftable manner and is used for shearing the road surface after the cutting of the cutting assembly, so as to obtain primary crushed soil.

[0017] In the first aspect of the present application, as an optional embodiment, the shearing mechanism comprises a second mounting frame, a second rotating shaft, a rotating disc, a cutter head assembly and a second driving assembly.

[0018] The second mounting frame is fixedly installed on the bottom surface of the first mounting frame.

[0019] The second rotating shaft is rotatably installed on the second mounting frame; the second rotating shaft has a through hole penetrating along the axial direction thereof.

[0020] The rotating disc is sleeved on the second rotating shaft and is fixedly connected with the second rotating shaft.

[0021] The cutter head assembly is fixedly installed on the front end of the rotating disc.

[0022] The second driving assembly is installed on the second mounting frame; the second driving assembly drives the second rotating shaft to rotate, so as to drive the rotating disc and the cutter head assembly to rotate.

[0023] In the first aspect of the present application, as an optional embodiment, the shearing mechanism further comprises a spiral conveying assembly; the spiral conveying assembly comprises a cutter shaft and a spiral blade; the cutter shaft is rotatably installed on the second mounting frame; one end of the cutter shaft extends outward through the through hole of the second rotating shaft; the spiral blade is fixedly installed on the cutter shaft; one end of the spiral blade extends outward through the through hole of the second rotating shaft; the second driving assembly can drive the second rotating shaft and the cutter shaft to rotate relative to each other; the spiral conveying assembly is used for conveying the primary crushed soil and performing secondary crushing on the primary crushed soil during the conveying process, so as to obtain secondary crushed soil.

[0024] In the first aspect of the present application, as an optional embodiment, the second driving assembly comprises: a positive umbrella wheel mounted on the cutter shaft, a reverse umbrella wheel fixed on the second rotating shaft, a second driving umbrella wheel engaged between the positive umbrella wheel and the reverse umbrella wheel, and a second motor mounted on the second mounting frame for driving the second driving umbrella wheel to rotate.

[0025] In the first aspect of the present application, as an optional embodiment, the cutter head assembly comprises a plurality of triangular blades uniformly distributed along the circumference of the rotating disc, which are fixedly installed on the end face of the rotating disc in a radial manner to form a tapered cutter head with a large diameter near one end of the rotating disc and a small diameter away from the end of the rotating disc.

[0026] In the first aspect of the present application, as an optional embodiment, the second mounting frame comprises a support frame fixedly installed between the two lateral extension arms, a mounting seat arranged below the support frame, a second hanger for positioning the second rotating shaft and a first hanger for positioning the cutter shaft fixedly installed below the mounting seat, and a hydraulic cylinder fixedly installed on the support frame, with the piston rod end of the hydraulic cylinder fixedly connected with the mounting seat.

[0027] In the first aspect of the present application, as an optional embodiment, the bottom of the vehicle body is provided with a storage compartment, a lifting conveyor belt is installed between the inside of the storage compartment and the lower part of the second rotating shaft, which can transport the secondary crushed soil into the storage compartment, and an opening and closing door is arranged at the end of the storage compartment away from the first mounting frame, and an inclined bottom is arranged inside the storage compartment.

[0028] The present application has the following advantages:

[0029] 1. According to the trench excavating equipment of the embodiment of the present application, when the device needs to be used, the vehicle body is driven to the road surface to be excavated by a driver or automatically, the support assembly is first controlled to descend so that the cutter head can reach the ground, the rotating driving mechanism drives the first rotating shaft to rotate, and the first rotating shaft drives a plurality of cutter heads to rotate to cut the road surface; at the same time that the cutter head cuts the road surface, a plurality of knocking assemblies are controlled to act so that each knocking assembly can repeatedly knock the road surface between the two cutter heads adjacent thereto in the vertical direction. In this way, the cutting assembly and the knocking assembly are arranged, during the movement of the vehicle body, the cutting assembly first cuts the hard cement ground on the ground by rotating, which is beneficial to cutting the hard cement ground on the ground, the whole road surface is cut and decomposed into a plurality of sub-road surface areas by the plurality of cutter heads during the cutting process, which reduces the connection strength of the whole road surface, and each knocking assembly repeatedly knocks the sub-road surface area in the vertical direction, which can quickly break the relatively large cement block, thereby greatly improving the breaking efficiency.

[0030] 2、The knocking assembly of the present application comprises an L-shaped fixing frame, a knocking piece, a return spring and a cam; the first rotating shaft drives the cam to rotate together, the radius of the cam near the pressing plate side is gradually changed, when the large diameter end is pressed on the pressing plate, the pressing plate extrudes the return spring downward, the sliding rod moves downward along the guide hole, the sharp head of the sliding rod chisels the ground downward, so as to break the cement ground, when the small diameter end of the cam is above the pressing plate, the return spring loses the upward extrusion force and rebounds, so that the sliding rod can rebound upward, when the first rotating shaft operates at high speed, the return spring is repeatedly extruded and rebounded, the knocking piece reciprocatingly moves upward and downward to realize repeated knocking on the road surface, which has the advantages of compact structure, small space occupation, stable operation and high breaking efficiency.

[0031] 3、The shearing mechanism of the present application comprises a second mounting frame, a second rotating shaft, a rotating disc, a cutter head assembly and a second driving assembly; the second driving assembly drives the cutter head assembly to rotate, the cutter head assembly can shear the soil to cut the soil, and the position passed by the cutter head assembly during the movement of the vehicle body can form a pit, with the walking of the vehicle body, the position passed by the cutter head assembly is a line, that is, the line can form a tunnel, since the rotation of the rotating disc is relatively stable, the wall of the excavated pit is relatively smooth, and the concave-convex phenomenon will not occur.

[0032] 4、The shearing mechanism of the present application further comprises a spiral conveying assembly, the spiral conveying assembly comprises a cutter shaft and a spiral blade; the second driving assembly drives the second rotating shaft and the cutter shaft to rotate oppositely, the cutter head assembly shears the soil to cut the soil, and the rotating direction of the cutter shaft is opposite to that of the second rotating shaft, so that the spiral blade can convey the once broken soil to the direction close to the vehicle body, and the once broken soil is secondarily broken during the conveying process, so as to obtain the twice broken soil, and the bottom layer of the sand can be treated, the excavation and the discharge can be simultaneously performed, the sand generated during the excavation is treated in time, and the continuous excavation operation is not affected. In addition, the second driving assembly comprises a forward umbrella wheel mounted on the cutter shaft, a reverse umbrella wheel fixed on the second rotating shaft, a second driving umbrella wheel engaged between the forward umbrella wheel and the reverse umbrella wheel, and a second motor mounted on the second mounting frame and used for driving the second driving umbrella wheel to rotate. In this way, the second rotating shaft and the cutter shaft are driven to rotate oppositely by one second motor, and the present application has the advantages of compact structure, small space occupation and good running synchronization of the second rotating shaft and the cutter shaft. BRIEF DESCRIPTION OF DRAWINGS

[0033] The drawings constituting a part of the specification of the present application are used to provide further understanding of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application.

[0034] Figure 1 It is the overall structure schematic view of the trench excavation equipment of the present application;

[0035] Figure 2 First perspective view of the cutter head installation of the present application;

[0036] Figure 3 Second perspective view of the cutter head installation of the present application;

[0037] Figure 4 Enlarged view of the A zone of the present application; Figure 3

[0038] Figure 5 Drive diagram of the first rotating shaft of the present application

[0039] Figure 6 Installation schematic diagram of the shearing mechanism of the present application;

[0040] Figure 7 Structural schematic diagram of the second drive assembly of the present application;

[0041] Figure 8 Sectional view of the shearing mechanism of the present application;

[0042] Figure 9 Internal structural schematic diagram of the storage compartment of the present application.

[0043] In the drawings,

[0044] 10, vehicle body; 11, storage compartment; 111, opening and closing door; 112, tilting bottom;

[0045] 20, first mounting frame; 21, transversely extending arm; 22, vertically extending arm; 23, longitudinally connecting arm;

[0046] 30, cutting assembly; 31, first rotating shaft; 32, cutter head; 33, rotary drive mechanism; 331, first motor; 332, first driving bevel gear; 333, first driven bevel gear;

[0047] 40, knocking assembly; 41, L-shaped fixing frame; 42, knocking piece; 421, sliding rod; 422, pressing plate; 423, sharp head; 43, return spring; 44, cam; 441, abutting portion;

[0048] 50, shearing mechanism; 51, second mounting frame; 511, support frame; 512, mounting seat; 513, second hanger; 514, first hanger; 515, hydraulic cylinder; 52, second rotating shaft; 53, rotary disc; 54, cutter head assembly; 541, triangular blade; 55, second drive assembly; 551, forward bevel gear; 552, reverse bevel gear; 553, second driving bevel gear; 554, second motor; 56, spiral conveying assembly; 561, cutter shaft; 562, spiral blade;

[0049] 60, lifting conveyor belt. DETAILED DESCRIPTION​

[0050] Hereinafter, the present application will be further described with reference to the drawings and specific embodiments, it should be noted that, in the absence of conflict, the following described embodiments or between the technical features can be any combination to form a new embodiment. Except for the special description, the materials and equipment used in the embodiments can be purchased from the market. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and cannot be understood as a limitation on the present application.

[0051] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the present application. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically specified.

[0052] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected", "communicated", "connected" should be understood in a broad sense, for example, it can be fixedly connected, or connected through an intermediate medium, or the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0053] The terms "first", "second", and the like in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0054] Please refer to Figures 1-9 The trench excavation device for road construction provided by the embodiment of the present application comprises a vehicle body 10 and a trench excavation mechanism installed on the vehicle body 10; the trench excavation mechanism comprises a supporting assembly 20, a cutting assembly 30 and a plurality of knocking assemblies 40.

[0055] Specifically, the support assembly comprises a first mounting frame 20 which is mounted on the front end of the vehicle body 10 in a liftable manner; the first mounting frame 20 comprises two transversely extending arms 21, two vertically extending arms 22 and a longitudinal connecting arm 23; the two transversely extending arms 21 are arranged in parallel along the transverse direction at the front end of the vehicle body 10, and the first ends of the two transversely extending arms 21 are mounted on the vehicle body 10 in a liftable manner, and the second ends of the two transversely extending arms 21 extend outward along the transverse direction; the longitudinal connecting arm 23 is fixedly connected with the two transversely extending arms 21 at the two ends thereof, and the two vertically extending arms 22 are fixedly mounted on the bottom surface of the longitudinal connecting arm 23 in parallel along the vertical direction.

[0056] Specifically, the cutting assembly 30 comprises a first rotating shaft 31, a plurality of cutter heads 32 and a rotating driving mechanism 33; the first rotating shaft 31 is rotatably mounted between the two vertically extending arms, and the plurality of cutter heads 32 are fixedly mounted on the first rotating shaft 31 in a longitudinal direction; the rotating driving mechanism 33 is mounted on the first mounting frame, and the rotating driving mechanism 33 is used for driving the first rotating shaft 31 to rotate, and the first rotating shaft 31 drives the plurality of cutter heads 32 to rotate to realize cutting of the road surface.

[0057] Specifically, a set of knocking assemblies 40 is arranged between each adjacent two cutter heads 32, and the knocking assemblies 40 are used for repeatedly knocking the road surface between the two adjacent cutter heads 32 along the vertical direction.

[0058] On the basis of the above structure, in the actual application process, the vehicle body 10 is driven to the road surface to be excavated by the driver or in an automatic driving manner, first, the support assembly is controlled to descend, so that the cutter heads 32 can reach the ground, the rotating driving mechanism 33 drives the first rotating shaft 31 to rotate, and the first rotating shaft 31 drives the plurality of cutter heads 32 to rotate to realize cutting of the road surface; at the same time that the cutter heads 32 cut the road surface, the plurality of knocking assemblies 40 are controlled to act, so that each set of knocking assemblies 40 can repeatedly knock the road surface between the two adjacent cutter heads 32 along the vertical direction. In this way, the cutting assembly 30 and the knocking assembly 40 are arranged in the present application, in the moving process of the vehicle body 10, the cutting assembly 30 first rotates to cut the hard cement ground on the ground, which is beneficial to cutting of the hard cement ground on the ground, and the plurality of cutter heads 32 cut the entire road surface into a plurality of sub-road surface areas in the cutting process, which reduces the overall connection strength of the road surface, and then each set of knocking assemblies 40 repeatedly knocks the sub-road surface area along the vertical direction, which can quickly break the relatively large cement blocks, and greatly improves the breaking efficiency.

[0059] In the preferred embodiment of the present application, the knocking assembly 40 comprises an L-shaped fixing frame 41, a knocking piece 42, a return spring 43 and a cam 44.

[0060] The L-shaped fixing frame 41 comprises a vertical connecting part and a transverse connecting part fixedly connected to the lower end of the vertical connecting part; the upper end of the vertical connecting part is fixedly installed on the bottom surface of the longitudinal connecting arm 23, and the transverse connecting part extends to between every two adjacent cutter heads 32; a guide hole is arranged on the transverse connecting part;

[0061] The knocking part 42 comprises a sliding rod 421, the upper end of the sliding rod 421 is fixedly installed with a pressing plate 422, and the lower end of the sliding rod 421 is formed with a sharp head 423; the sharp head 423 of the sliding rod 421 extends downward through the guide hole;

[0062] The reset spring 43 is sleeved on the sliding rod 421, the upper end of the reset spring 43 is fixedly connected to the bottom surface of the pressing plate 422, and the lower end of the reset spring 43 is fixedly connected to the upper surface of the transverse connecting part;

[0063] The cam 44 is fixedly installed on the first rotating shaft 31, the cam 44 has a pressing part 441 with a gradually decreasing radius; the cam 44 is driven to rotate by the first rotating shaft 31, so that the pressing part 441 can press or be separated from the pressing plate 422.

[0064] On the basis of the above structure, the first rotating shaft 31 drives the cam 44 to rotate together, the radius of the side of the cam 44 close to the pressing plate 422 is gradually changed, when the large-diameter end is pressed on the pressing plate 422, the pressing plate 422 extrudes the reset spring 43 downward, the sliding rod 421 moves downward along the guide hole, and the sharp head 423 of the sliding rod 421 strikes the ground downward, so as to break the cement ground; when the small-diameter end of the cam 44 is above the pressing plate 422, the reset spring 43 loses the upward extrusion force and rebounds, so that the sliding rod 421 can rebound upward; when the first rotating shaft 31 operates at high speed, the reset spring 43 is repeatedly extruded and rebounded, the knocking part 42 reciprocally moves upward and downward to realize repeated knocking on the road surface, and the device has the advantages of compact structure, small space occupation, stable operation and high breaking efficiency.

[0065] In the preferable embodiment of the present application, the rotating driving mechanism 33 comprises a first motor 331, a first driving bevel gear 332 and a first driven bevel gear 333; the first motor 331 is fixedly installed on the transversely extending arm 21, the first driving bevel gear 332 is fixedly installed on the output shaft of the first motor 331, the first driven bevel gear 333 is fixedly installed on one end of the first rotating shaft 31, and the first driving bevel gear 332 and the first driven bevel gear 333 are in engagement with each other; the first motor 331 drives the first driving bevel gear 332 to rotate, the first driving bevel gear 332 drives the first driven bevel gear 333 to rotate, and the first driven bevel gear 333 drives the first rotating shaft 31 to rotate. In this way, the first rotating shaft 31 is driven to rotate by the first motor 331, the first rotating shaft drives the plurality of cutter heads 32 to rotate for cutting, and the cam 44 is driven to rotate, so that the abutting portion 441 can abut against or be separated from the pressing plate 422, and the knocking member 42 is driven to reciprocatingly move up and down to repeatedly knock the road surface, thereby having the advantages of compact structure, small space occupation and good synchronization of the operation of the cutter heads 32 and the knocking member 42.

[0066] In the preferable embodiment of the present application, the shearing mechanism 50 is further provided, which is installed on the mounting frame in a liftable manner and is used for shearing the road surface after being cut by the cutting assembly 30, so as to obtain the once-crushed soil.

[0067] Specifically, the shearing mechanism 50 comprises a second mounting frame 51, a second rotating shaft 52, a rotating disc 53, a cutter head assembly 54 and a second driving assembly 55; the second mounting frame 51 is fixedly installed on the bottom surface of the first mounting frame 20; the second rotating shaft 52 is rotatably installed on the second mounting frame 51; the second rotating shaft 52 has a through hole penetrating along the axial direction thereof; the rotating disc 53 is sleeved on the second rotating shaft 52 and is fixedly connected therewith; the cutter head assembly 54 is fixedly installed on the front end of the rotating disc 53; and the second driving assembly 55 is installed on the second mounting frame 51, and drives the second rotating shaft 52 to rotate, so as to drive the rotating disc 53 and the cutter head assembly 54 to rotate. Preferably, the number of the second rotating shaft 52, the rotating disc 53, the cutter head assembly 54 and the second driving assembly 55 is two.

[0068] On the basis of the above structure, the second driving assembly 55 drives the cutter head assembly 54 to rotate, the cutter head assembly 54 can shear the soil to crush the soil, and the position passed through by the cutter head assembly 54 during the movement of the vehicle body 10 can form a pit, and the position passed through by the cutter head assembly 54 is a line during the movement of the vehicle body 10, that is, the line can form a pit, and since the rotation of the rotating disc 53 is relatively stable, the wall of the pit excavated by the rotating disc 53 is relatively smooth and does not have the phenomenon of unevenness.

[0069] In the preferable embodiment of the present application, the shearing mechanism 50 further comprises a screw conveying assembly 56, which comprises a cutter shaft 561 and a screw blade 562; the cutter shaft 561 is rotatably mounted on the second mounting frame 51 and extends outward through the through hole of the second rotating shaft 52; the screw blade 562 is fixedly mounted on the cutter shaft 561 and extends outward through the through hole of the second rotating shaft 52; the second driving assembly 55 can drive the second rotating shaft 52 and the cutter shaft 561 to rotate oppositely; the screw conveying assembly 56 is used for conveying the primary crushed soil and performing secondary crushing on the primary crushed soil during the conveying process, so as to obtain the secondary crushed soil. Preferably, the number of the shearing mechanism 50 is two.

[0070] On the basis of the above structure, the second driving assembly 55 drives the second rotating shaft 52 and the cutter shaft 561 to rotate oppositely, the cutter head assembly 54 shears the soil to cut the soil, the rotating direction of the cutter shaft 561 is opposite to the rotating direction of the second rotating shaft 52, so that the screw blade 562 can convey the primary crushed soil toward the direction close to the vehicle body 10 and perform secondary crushing on the primary crushed soil during the conveying process, so as to obtain the secondary crushed soil, and the bottom layer of the silt can be processed, the excavation and the material discharge can be simultaneously performed, and the silt generated during the excavation can be processed in time to avoid affecting the continuous excavation operation.

[0071] In the preferable embodiment of the present application, the second driving assembly 55 comprises a forward umbrella wheel 551 mounted on the cutter shaft 561, a reverse umbrella wheel 552 fixed on the second rotating shaft 52, a second driving umbrella wheel 553 engaged between the forward umbrella wheel 551 and the reverse umbrella wheel 552, and a second motor 554 mounted on the second mounting frame 51 and used for driving the second driving umbrella wheel 553 to rotate. In this way, the second rotating shaft 52 and the cutter shaft 561 are driven to rotate oppositely by one second motor 554, which has the advantages of compact structure, small space occupation and good synchronization of the operation of the second rotating shaft 52 and the cutter shaft 561.

[0072] In the preferable embodiment of the present application, the cutter head assembly 54 comprises a plurality of triangular blades 541 uniformly distributed along the circumference of the rotating disc 53, the triangular blade 541 is a right triangle, and two vertical edges thereof are fixed with the rotating disc 53 and the second rotating shaft 52 respectively; the triangular blade 541 is fixedly installed on the end face of the rotating disc 53 in a radial manner, so as to form a tapered cutter head with a large diameter close to one end of the rotating disc 53 and a small diameter away from the end of the rotating disc 53. In this way, the sharp part of the tapered cutter head first contacts the soil, so that the excavation is more labor-saving.

[0073] In the embodiment, the triangular blade 541 is preferably made of stainless steel to avoid rusting caused by the tax inside the soil and prolong the service life of the triangular blade 541, and the inclined edge of the triangular blade is preferably provided with a blade edge to provide stronger shearing capacity, so that the device can continue to perform the excavation operation when encountering hard stones.

[0074] In the preferred embodiment of the present application, the second mounting frame 51 comprises a support frame 511 fixedly mounted between the two transversely extending arms 21, and a mounting seat 512 arranged below the support frame 511; a second hanger 513 for positioning the second rotating shaft 52 and a first hanger 514 for positioning the blade shaft 561 are fixedly mounted below the mounting seat 512; a hydraulic cylinder 515 is fixedly mounted on the support frame 511, and the piston rod end of the hydraulic cylinder 515 is fixedly connected with the mounting seat 512.

[0075] Based on the above structure, when the hydraulic cylinder 515 works and the piston rod extends and retracts, the lower mounting seat 512 can be driven to move up and down, i.e., when excavating, the hydraulic cylinder 515 drives the piston rod to extend downward, at this time, the shearing mechanism 50 moves downward to reach the required excavation position, and when not excavating, the hydraulic cylinder 515 drives the piston rod to retract upward, at this time, the shearing mechanism 50 moves upward to reach a height higher than the wheels of the vehicle body 10, thereby avoiding affecting the walking of the vehicle body 10 in the non-excavation state.

[0076] In the preferred embodiment of the present application, the bottom of the vehicle body 10 is provided with a storage compartment 11, a lifting conveyor belt 60 is mounted between the lower part of the second rotating shaft 52 and the inside of the storage compartment 11, and the lifting conveyor belt 60 can transport the secondary crushed soil into the storage compartment 11; an opening and closing door 111 is arranged at the end of the storage compartment 11 away from the first mounting frame 20, and an inclined bottom 112 is arranged inside the storage compartment 11.

[0077] In order to store the silt conveyed by the spiral blade 562, specifically, the bottom of the vehicle body 10 is provided with a storage compartment 11, a lifting conveyor belt 60 is mounted between the lower part of the second rotating shaft 52 and the inside of the storage compartment 11, and the lifting conveyor belt 60 can transport the silt into the storage compartment 11, i.e., the silt conveyed by the spiral blade 562 can fall onto the upper surface of the lifting conveyor belt 60, so that the lifting conveyor belt 60 can convey the silt to the inside of the storage compartment 11 for storage;

[0078] In the embodiment, preferably, a lifting bucket is arranged on the outer surface of the lifting conveyor belt 60 (which is a conventional technique and will not be described here) to facilitate the upward lifting of the sludge; the lower end of the lifting conveyor belt 60 is provided with a conveyor belt support, which is fixed to the lower end of the first hanger 514, and when the first hanger 514 is lifted or lowered by the hydraulic cylinder 515, the lower end of the lifting conveyor belt 60 is also lifted or lowered synchronously, so that the lower end of the lifting conveyor belt 60 can also be lifted, avoiding the influence of the lifting conveyor belt 60 on the travel of the vehicle body 10 when the device is not excavating;

[0079] As shown in FIGS. Figure 1 and Figure 9 Specifically, the storage compartment 11 is provided with an opening and closing door 111 at one end away from the first mounting frame 20, and the inside of the storage compartment 11 is provided with an inclined bottom 112, the higher end of the inclined bottom 112 should be close to one end of the shearing mechanism 50, and the lower end should be close to one end of the opening and closing door 111.

[0080] In the embodiment, the sludge conveyed by the lifting conveyor belt 60 can directly reach the position of the inclined bottom 112 and move downward along the slope, and when the opening and closing door 111 is opened, the sludge can fall downward to facilitate the discharging.

[0081] Although only some parts and embodiments of the present application have been illustrated and described, many modifications and changes can be made by those skilled in the art without departing from the scope and spirit of the claims, such as: changes in the size, dimension, structure, shape and proportion of each element, installation arrangement, material use, color, orientation, etc.

[0082] The above embodiments are only preferred embodiment modes of the embodiments of the present application, and cannot be used to limit the scope of protection of the embodiments of the present application, and any non-essential changes and substitutions made by those skilled in the art on the basis of the embodiments of the present application are within the scope of protection of the embodiments of the present application.

Claims

1. A trench excavating apparatus for road construction, comprising a vehicle body and a trench excavating mechanism mounted on the vehicle body; characterized by, The trench excavating mechanism comprises: A support assembly comprising a first mounting frame which is mounted on the front end of the vehicle body in a liftable manner; the first mounting frame comprises two transversely extending arms, two vertically extending arms and a longitudinally connecting arm; the two transversely extending arms are arranged in parallel along the transverse direction at the front end of the vehicle body, and the first ends of the transversely extending arms are mounted on the vehicle body in a liftable manner, and the second ends of the transversely extending arms extend outwardly along the transverse direction; the longitudinally connecting arm is fixedly connected with the two transversely extending arms at the two ends thereof, and the two vertically extending arms are fixedly mounted on the bottom surface of the longitudinally connecting arm in parallel along the vertical direction; A cutting assembly comprising a first rotating shaft, a plurality of cutter heads and a rotating driving mechanism; the first rotating shaft is rotatably mounted between the two vertically extending arms, and the plurality of cutter heads are fixedly mounted on the first rotating shaft in a longitudinal direction; the rotating driving mechanism is mounted on the first mounting frame, and the rotating driving mechanism is used to drive the first rotating shaft to rotate, and the first rotating shaft drives the plurality of cutter heads to rotate to cut the road surface; A plurality of knocking assemblies, each of which is arranged between every two adjacent cutter heads, and the knocking assembly is used to repeatedly knock the road surface between the two adjacent cutter heads along the vertical direction; The knocking assembly comprises an L-shaped fixing frame, a knocking member, a return spring and a cam; The L-shaped fixing frame comprises a vertical connecting portion and a transverse connecting portion which is fixedly connected with the lower end of the vertical connecting portion; the upper end of the vertical connecting portion is fixedly mounted on the bottom surface of the longitudinally connecting arm, and the transverse connecting portion extends to between every two adjacent cutter heads; the transverse connecting portion is provided with a guide hole; The knocking member comprises a sliding rod, the upper end of the sliding rod is fixedly provided with a pressing plate, and the lower end of the sliding rod is formed with a sharp head portion; the sharp head portion of the sliding rod extends downwardly through the guide hole; The return spring is sleeved on the sliding rod, the upper end of the return spring is fixedly connected with the bottom surface of the pressing plate, and the lower end of the return spring is fixedly connected with the upper surface of the transverse connecting portion; The cam is fixedly mounted on the first rotating shaft, and the cam has a pressure-pressing portion with a gradually decreasing radius; the cam rotates under the driving of the first rotating shaft, so that the pressure-pressing portion can press against or be separated from the pressing plate.

2. The roadway construction trench excavating apparatus of claim 1, wherein, The rotating driving mechanism comprises a first motor, a first driving bevel gear and a first driven bevel gear; the first motor is fixedly mounted on the transversely extending arm, the first driving bevel gear is fixedly mounted on the output shaft of the first motor, and the first driven bevel gear is fixedly mounted on one end of the first rotating shaft; the first driving bevel gear and the first driven bevel gear are in engagement with each other; the first motor drives the first driving bevel gear to rotate, the first driving bevel gear drives the first driven bevel gear to rotate, and the first driven bevel gear drives the first rotating shaft to rotate.

3. The roadway construction trench excavating apparatus of claim 1, wherein, Further comprising a shearing mechanism which is mounted on the mounting frame in a liftable manner, and the shearing mechanism is used to shear the road surface which has been cut by the cutting assembly, so as to obtain the once-crushed soil.

4. The roadway construction trench excavating apparatus of claim 3, wherein, The shearing mechanism comprises a second mounting frame, a second rotating shaft, a rotating disc, a cutter head assembly and a second driving assembly; The second mounting frame is fixedly mounted on the bottom surface of the first mounting frame; The second rotating shaft is rotatably mounted on the second mounting frame; the second rotating shaft has a through hole penetrating along the axial direction thereof; The rotating disc is sleeved on the second rotating shaft and fixedly connected with the second rotating shaft; The cutter head assembly is fixedly mounted on the front end of the rotating disc; The second driving assembly is mounted on the second mounting frame; the second driving assembly drives the second rotating shaft to rotate, thereby driving the rotating disc and the cutter head assembly to rotate.

5. The roadway construction trench excavating apparatus of claim 4, wherein, The shearing mechanism further comprises a screw conveying assembly; the screw conveying assembly comprises a cutter shaft and a screw blade; the cutter shaft is rotatably mounted on the second mounting frame; one end of the cutter shaft extends outward through the through hole of the second rotating shaft; the screw blade is fixedly mounted on the cutter shaft; one end of the screw blade extends outward through the through hole of the second rotating shaft; the second driving assembly can drive the second rotating shaft and the cutter shaft to rotate relative to each other; the screw conveying assembly is used for conveying the primary crushed soil and performing secondary crushing on the primary crushed soil during the conveying process, thereby obtaining the secondary crushed soil.

6. The roadway construction trench excavating apparatus of claim 5, wherein, The second driving assembly comprises a forward umbrella wheel mounted on the cutter shaft, a reverse umbrella wheel fixed on the second rotating shaft, a second driving umbrella wheel engaged between the forward umbrella wheel and the reverse umbrella wheel, and a second motor mounted on the second mounting frame and used for driving the second driving umbrella wheel to rotate.

7. The roadway construction trench excavating apparatus of claim 4, wherein, The cutter head assembly comprises a plurality of triangular blades uniformly distributed along the circumferential direction of the rotating disc; the triangular blades are fixedly installed on the end face of the rotating disc in a radial manner, so as to form a tapered cutter head with a large diameter close to one end of the rotating disc and a small diameter away from the one end of the rotating disc.

8. The roadway construction trench excavating apparatus of claim 5, wherein, The second mounting frame comprises a support frame fixedly mounted between the two transversely extending arms, and a mounting seat arranged below the support frame; a second hanger for positioning the second rotating shaft and a first hanger for positioning the cutter shaft are fixedly mounted below the mounting seat; a hydraulic cylinder is fixedly mounted on the support frame, and the piston rod end of the hydraulic cylinder is fixedly connected with the mounting seat.

9. The roadway construction trench excavating apparatus of claim 5, wherein, The bottom of the vehicle body is provided with a storage compartment; a lifting conveying belt is mounted between the lower portion of the second rotating shaft and the interior of the storage compartment; the lifting conveying belt can transport the secondary crushed soil into the storage compartment; an opening and closing door is arranged at the end of the storage compartment away from the first mounting frame; and an inclined bottom is arranged below the interior of the storage compartment.

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