Automatic trimming device for road base paving construction

Abstract

The present invention relates to the technical field of paving equipment, and in particular to an automatic trimming device for road base paving construction, which comprises a bracket and a cutting knife. When the cutting knife is in a first working state, the first end face of a support ring is coplanar with the third end faces of a plurality of splicing rings. When the cutting knife is in a second working state, the second end face of the support ring is coplanar with the fourth end faces of the plurality of splicing rings. By limiting the taper value of the first end face and the taper value of the second end face, it is ensured that when the cutting knife is in the first working state, the first end face of the support ring and the third end faces of the plurality of splicing rings jointly extrude the edge of the road base into an inclined surface; when the cutting knife is in the second working state, the sealing plate is in a state close to a road roller, and the sealing plate and the blade cut the edge of the road base into a straight edge, thereby ensuring that only one cutting knife is needed to be carried when trimming the edge of the road base, and construction personnel do not need to frequently carry a large number of cutting tools, thereby improving the overall construction efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of road paving equipment, and in particular to an automatic trimming device for road base paving construction. Background Art

[0002] In road construction, the paving quality of the road base is directly related to the stability and durability of the entire road. According to different design standards and construction requirements, the edge of the road base often needs to be trimmed into a bevel and a straight edge, where the bevel is generally set at the roadside and the straight edge is generally set at the joint.

[0003] In the prior art, for example, a Chinese patent with authorization announcement number CN220335672U discloses an integrated equipment for rolling and trimming asphalt pavement construction. In the actual construction process, two sets of different types of tools are often required for trimming the bevel and straight edges, one set for trimming the bevel and the other for trimming the straight edges. This not only increases the difficulty of carrying the construction equipment, but also requires construction workers to frequently carry a large number of tools at the construction site, consuming a lot of manpower and material resources. Summary of the invention

[0004] The invention provides an automatic trimming device for road base paving construction, so as to solve the problem that in the existing road paving process, two sets of cutting tools need to be carried to trim the roadside, which affects the construction efficiency.

[0005] The automatic trimming device for road base paving construction of the present invention adopts the following technical scheme:

[0006] An automatic trimming device for road base paving construction comprises a bracket and a cutting knife.

[0007] The bracket is connected to the roller, and a horizontal rotating shaft is rotatably arranged on the bracket; the cutting knife has a first working condition for trimming the edge of the road base into a beveled edge and a second working condition for trimming the edge of the road base into a straight edge; the cutting knife includes a support ring, a plurality of splicing rings, a blade and a sealing plate, the support ring is coaxially sleeved on the outside of the rotating shaft, the support ring has a first end face and a second end face, and the first end face and the second end face are conical surfaces with different taper values; the plurality of splicing rings are sleeved in sequence, and the splicing ring at the innermost side is sleeved on the outside of the support ring, the splicing ring has a third end face and a fourth end face, and the third end face and the fourth end face are conical surfaces with different taper values; the taper value of the third end face is the same as that of the first end face The taper values ​​of one end face are the same, the taper value of the fourth end face is the same as the taper value of the second end face, and the taper value of the first end face is smaller than the taper value of the second end face; the blade sleeve is arranged on the outside of the outermost splicing ring, and the thickness of the outer edge of the blade is smaller than the thickness of the inner edge of the blade; the sealing plate is coaxially connected to the rotating shaft, and the sealing plate is fixedly connected to the blade; when the cutting knife is in the first working condition, the first end face of the support ring is coplanar with the third end faces of the plurality of splicing rings, and the sealing plate is in a state close to the second end face; when the cutting knife is in the second working condition, the second end face of the support ring is coplanar with the fourth end faces of the plurality of splicing rings, and the sealing plate is in a state close to the first end face.

[0008] Furthermore, the support ring is coaxially slidably connected to the rotating shaft; a first slider is fixedly provided on the outer side wall of the support ring, and a first slide groove is provided on the inner side wall of the innermost splicing ring, the first slider is slidably provided in the first slide groove, and the first slide groove has a first end point and a second end point in its own extension direction, when the first slider slides to the first end point, the first end face of the support ring is coplanar with the third end face of the innermost splicing ring, and when the first slider slides to the second end point, the second end face of the support ring is coplanar with the fourth end face of the innermost splicing ring.

[0009] Furthermore, the inner side wall of each of the splicing rings is provided with the first sliding groove, and the outer side wall of each of the splicing rings is fixedly provided with a second sliding block; in two adjacent splicing rings, the second sliding block is slidably provided in one of the first sliding grooves; when the second sliding block slides to the first end point, the third end faces of the plurality of splicing rings are coplanar, and when the second sliding block slides to the second end point, the fourth end faces of the plurality of splicing rings are coplanar.

[0010] Furthermore, a second slide groove is provided on the inner side wall of the blade, and the second slider on the outermost splicing ring is slidably arranged in the second slide groove, and the second slide groove has a third endpoint and a fourth endpoint in its own extension direction; the blade has a fifth end face and a sixth end face, the fifth end face is a conical face, and the taper value of the fifth end face is equal to the taper value of the fourth end face; the sixth end face is a vertical face perpendicular to the rotating shaft, and when the second slider slides to the fourth endpoint, the fifth end face is coplanar with the fourth end face.

[0011] Furthermore, the inner wall of the blade is provided with two sections of a first thread groove, and the length of each section of the first thread groove is equal to the thickness of the sealing plate; the outer wall of the sealing plate is provided with a second thread groove, and the second thread groove can be spirally connected to the first thread groove; when the cutting knife is in the second working condition, the sixth end face is coplanar with the side wall of the sealing plate.

[0012] Furthermore, when the cutting knife is in the first working condition, a cooling chamber is formed between the sealing plate, the support ring, the plurality of splicing rings and the blade; an injection port and a discharge port are provided on the sealing plate, and coolant can be injected into the cooling chamber through the injection port, and the coolant in the cooling chamber can be discharged from the cooling chamber through the discharge port.

[0013] Furthermore, a positioning sleeve is provided on the rotating shaft, a liquid supply channel and a liquid discharge channel are provided on the positioning sleeve, a first rotating ring and a second rotating ring are rotatably provided on the positioning sleeve, a first chamber is formed between the first rotating ring and the positioning sleeve, a second chamber is formed between the second rotating ring and the positioning sleeve, the first chamber is connected to the liquid supply channel, the second chamber is connected to the liquid discharge channel, the first chamber is connected to the liquid injection port, and the second chamber is connected to the liquid discharge port.

[0014] Furthermore, a first fixing nut and a second fixing nut are provided on the rotating shaft, and a third thread groove is provided on the rotating shaft. Both the first fixing nut and the second fixing nut can be threadedly connected to the third thread groove, and the first fixing nut is used to limit the sliding of the support ring on the rotating shaft; when the cutting knife is in the first working condition, the second fixing nut is used to limit the sliding of the sealing plate on the rotating shaft, and when the cutting knife is in the second working condition, the second fixing nut abuts against the first fixing nut.

[0015] Furthermore, a connecting ring is coaxially fixed on the support ring, a connecting thread is provided on the outer side wall of the connecting ring, a connecting groove is provided in the middle of the sealing plate, an auxiliary thread is provided on the inner side wall of the connecting groove, and when the cutting knife is in the second working condition, the connecting thread is spirally connected to the auxiliary thread.

[0016] Furthermore, a plurality of limiting protrusions are provided on the rotating shaft, each of the limiting protrusions can slide along the radial direction of the rotating shaft, the plurality of limiting protrusions are evenly distributed around the circumferential direction of the rotating shaft, the limiting protrusions can abut against the bracket, and the plurality of limiting protrusions are used to limit the sliding of the rotating shaft on the bracket.

[0017] The beneficial effects of the present invention are as follows: an automatic trimming device for road base paving construction of the present invention comprises a bracket and a cutting knife. When the edge of the road base is trimmed, the trimming method is determined according to the position of the edge of the road base. When the edge of the road base is at the roadside, the edge of the road base is generally trimmed into a beveled edge. When the edge of the road base is at a joint, the edge of the road base is generally trimmed into a straight edge. When the edge of the road base needs to be trimmed into a straight edge, the cutting knife is in a second working condition. When the edge of the road base needs to be trimmed into an inclined surface, the cutting knife is in a first working condition. When a roller rolls the road base, the bracket moves with the movement of the roller. During the movement of the bracket, the cutting knife rotates relative to the ground. During the rotation of the cutting knife, the action of cutting the edge of the road base is completed. Furthermore, when the cutting knife is in a first working condition, the first end face of the support ring is coplanar with the third end faces of the plurality of splicing rings, and when the cutting knife is in a second working condition, the second end face of the support ring is coplanar with the fourth end faces of the plurality of splicing rings. By limiting the taper value of the first end face and the taper value of the second end face, it is ensured that when the cutting knife is in the first working condition, the first end face of the support ring and the third end faces of the plurality of splicing rings are close to the roller, and the first end face of the support ring and the third end faces of the plurality of splicing rings jointly extrude the edge of the road base into an inclined surface; when the cutting knife is in the second working condition, the second end face of the support ring and the fourth end faces of the plurality of splicing rings are far away from the roller, and the sealing plate is close to the roller, and the sealing plate and the blade cut the edge of the road base into a straight edge, thereby ensuring that only one cutting knife is needed when trimming the edge of the road base, and construction personnel do not need to frequently carry a large number of cutting tools, thereby improving overall construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 A schematic diagram of the structure of a cutting knife in an automatic trimming device for road base paving construction provided by an embodiment of the present invention when the cutting knife is in a first working condition;

[0020] Figure 2 A top view of a cutting blade in an automatic trimming device for road base paving construction provided by an embodiment of the present invention when the cutting blade is in a first working state;

[0021] Figure 3 for Figure 2 Sectional view in the AA direction;

[0022] Figure 4 for Figure 3 A partial enlarged view of point B in the middle;

[0023] Figure 5 for Figure 3 A partial enlarged view of point C in the middle;

[0024] Figure 6 for Figure 3 A partial enlarged view of point D in the middle;

[0025] Figure 7 A schematic diagram of the structure of a cutting knife in an automatic trimming device for road base paving construction provided by an embodiment of the present invention when the cutting knife is in a second working condition;

[0026] Figure 8 A cross-sectional view of a cutting blade in an automatic trimming device for road base paving construction provided by an embodiment of the present invention when the cutting blade is in a second working state;

[0027] Fig. 9 for Figure 8 A partial enlarged view of point E in the middle.

[0028] In the figure: 110, longitudinal beam; 120, hinged beam; 130, telescopic beam; 140, rotating shaft; 210, supporting ring; 211, first end face; 212, second end face; 220, splicing ring; 221, third end face; 222, fourth end face; 230, blade; 231, fifth end face; 232, sixth end face; 240, blocking plate; 250, first slider; 260, first slide groove; 261, first end point; 262, The second endpoint; 270, the second slider; 280, the second slide groove; 281, the third endpoint; 282, the fourth endpoint; 310, the cooling chamber; 320, the liquid injection port; 330, the liquid discharge port; 340, the positioning sleeve; 341, the liquid supply channel; 350, the first fixing nut; 360, the second fixing nut; 370, the first rotating ring; 380, the second rotating ring; 410, the connecting ring; 420, the limiting protrusion; 430, the unlocking sleeve. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0031] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] like Figures 1 to 9 As shown, an embodiment of the present invention provides an automatic trimming device for road base paving construction, which includes a bracket and a cutting knife.

[0033] The bracket includes a longitudinal beam 110, an articulated beam 120 and a telescopic beam 130. The longitudinal beam 110 is arranged vertically, and the upper end of the longitudinal beam 110 is fixedly connected to the road roller. One end of the articulated beam 120 is hinged to the middle of the longitudinal beam 110, and the other end of the articulated beam 120 is rotatably provided with a rotating shaft 140, and the rotating shaft 140 is always in a horizontal state; one end of the telescopic beam 130 is hinged to the lower end of the longitudinal beam 110, and the other end of the telescopic beam 130 is hinged to the middle of the articulated beam 120. In this embodiment, a hydraulic cylinder is provided inside the telescopic beam 130. When the length of the hydraulic cylinder changes, the length of the telescopic beam 130 changes, and when the length of the telescopic beam 130 changes, the horizontal height of the rotating shaft 140 changes.

[0034] The cutting blade is coaxially arranged on the rotating shaft 140. When the road roller moves on the road base, the depth of the cutting blade cutting into the road base is controlled by controlling the length of the telescopic beam 130. The cutting blade has a first working condition for trimming the edge of the road base into a bevel and a second working condition for trimming the edge of the road base into a straight edge. Specifically, when the edge of the road base needs to be trimmed into a bevel, the cutting blade is in the first working condition, and when the edge of the road base needs to be trimmed into a straight edge, the cutting blade is in the second working condition. According to the needs of trimming the edge of the road base, the cutting blade is adjusted to the first working condition or the second working condition in time, thereby ensuring that only one cutting blade needs to be carried when trimming the edge of the road base, and there is no need for construction workers to frequently carry a large number of cutting tools.

[0035] Furthermore, the cutting knife includes a support ring 210, a plurality of splicing rings 220, a blade 230 and a blocking plate 240. The support ring 210 is coaxially sleeved on the outside of the rotating shaft 140. When the rotating shaft 140 is in a horizontal state, the right end of the rotating shaft 140 is connected to the hinge beam 120. The support ring 210 has a first end face 211 and a second end face 212. When the rotating shaft 140 is in a horizontal state, the left end face of the support ring 210 is the second end face 212. The right end face of the support ring 210 is set as the first end face 211. The first end face 211 and the second end face 212 are conical surfaces with different taper values. The taper value of the first end face 211 is smaller than the taper value of the second end face 212. The plurality of splicing rings 220 are sleeved in sequence. After the plurality of splicing rings 220 are sleeved in sequence, according to the positions of the splicing rings 220, the plurality of splicing rings 220 include an innermost splicing ring 220 and an outermost splicing ring 220. The innermost splicing ring 220 is coaxially sleeved on the outer side of the support ring 210. Each splicing ring 220 has a third end face 221 and a fourth end face 222. When the rotating shaft 140 is in a horizontal state, the left side of the splicing ring 220 is set. The end face is the fourth end face 222, and the right end face of the splicing ring 220 is the third end face 221. The third end face 221 and the fourth end face 222 are conical faces with different taper values, wherein the taper value of the third end face 221 is the same as the taper value of the first end face 211, and the taper value of the fourth end face 222 is the same as the taper value of the second end face 212. Two adjacent splicing rings 220 cannot rotate relative to each other, and the splicing ring 220 and the support ring 210 cannot rotate relative to each other. The blade 230 is sleeved on the outside of the outermost splicing ring 220, and the blade 230 cannot rotate relative to the splicing ring 220. The thickness of the outer edge of the blade 230 is less than the thickness of the inner edge of the blade 230, ensuring that the blade 230 can be smoothly inserted into the road base. The blocking plate 240 is coaxially connected to the rotating shaft 140, and the blocking plate 240 can be fixedly connected to the blade 230. When the cutting knife is in the first working condition, the first end face 211 of the support ring 210 is coplanar with the third end faces 221 of the plurality of splicing rings 220. It is easy to understand that the first end face 211 of the support ring 210 and the third end faces 221 of the plurality of splicing rings 220 are in the same conical surface, and the conical surface formed by the first end face 211 of the support ring 210 and the third end faces 221 of the plurality of splicing rings 220 is in a state close to the bracket. When the roller rolls the road base, the blade 230 is inserted into the road base, and the conical surface formed by the first end face 211 of the support ring 210 and the third end faces 221 of the plurality of splicing rings 220 squeezes the edge of the road base into an inclined surface; at this time, the blocking plate 240 is set in a state close to the second end face 212 of the support ring 210. By setting the blocking plate 240, the road base material is prevented from contacting the second end face 212 of the support ring 210 and the fourth end face 222 of the splicing ring 220.When the cutting knife is in the second working condition, the third end face 221 of the support ring 210 is coplanar with the fourth end faces 222 of the multiple splicing rings 220. It is easy to understand that the second end face 212 of the support ring 210 and the fourth end faces 222 of the multiple splicing rings 220 are in the same conical surface, and the conical surface formed by the second end face 212 of the support ring 210 and the fourth end faces 222 of the multiple splicing rings 220 is in a state of being away from the bracket. At this time, the sealing plate 240 is set in a state close to the first end face 211 of the support ring 210, and the sealing plate 240 is close to the bracket. When the roller rolls the road base, the blade 230 is inserted into the road base, and the sealing plate 240 and the blade 230 cut the edge of the road base into a straight edge, and the conical surface formed by the second end face 212 of the support ring 210 and the fourth end faces 222 of the multiple splicing rings 220 pushes the cut edge of the road base outward.

[0036] The automatic trimming device for road base paving construction of the present invention determines the trimming method according to the position of the road base edge when trimming the road base edge. When the road base edge is at the roadside, the road base edge is generally trimmed into a beveled edge. When the road base edge is at a joint, the road base edge is generally trimmed into a straight edge. When the road base edge needs to be trimmed into a straight edge, the cutting knife is in the second working condition. When the road base edge needs to be trimmed into an inclined surface, the cutting knife is in the first working condition. When a roller rolls the road base, the bracket moves with the movement of the roller. During the movement of the bracket, the cutting knife rotates relative to the ground. During the rotation of the cutting knife, the action of cutting the road base edge is completed. Furthermore, when the cutting blade is in the first working state, the first end face 211 of the support ring 210 is coplanar with the third end faces 221 of the plurality of splicing rings 220, and when the cutting blade is in the second working state, the second end face 212 of the support ring 210 is coplanar with the fourth end faces 222 of the plurality of splicing rings 220. By limiting the taper value of the first end face 211 and the taper value of the second end face 212, it is ensured that when the cutting blade is in the first working state, the first end face 211 of the support ring 210 and the third end faces 221 of the plurality of splicing rings 220 are in a state close to the roller, and the support ring 210 The first end face 211 and the third end faces 221 of the plurality of splicing rings 220 jointly extrude the edge of the road base into an inclined surface; when the cutting knife is in the second working condition, the second end face 212 of the support ring 210 and the fourth end faces 222 of the plurality of splicing rings 220 are in a state away from the roller, and the blocking plate 240 is in a state close to the roller, and the blocking plate 240 and the blade 230 cut the edge of the road base into a straight edge, thereby ensuring that only one cutting knife is needed when trimming the edge of the road base, and construction workers do not need to frequently carry a large number of cutting tools, thereby improving the overall construction efficiency.

[0037] In one embodiment, the support ring 210 is coaxially slidably connected to the rotating shaft 140 , so as to facilitate the installation of the support ring 210 on the rotating shaft 140 . A first slider 250 is fixedly provided on the outer wall of the support ring 210, and a first slide groove 260 is provided on the inner wall of the innermost splicing ring 220. The extension direction of the first slide groove 260 is parallel to the axial direction of the splicing ring 220. The first slider 250 is slidably provided in the first slide groove 260. The first slide groove 260 has a first end point 261 and a second end point 262 in its own extension direction. When the rotating shaft 140 is in a horizontal state, the first end point 261 is at the right end of the first slide groove 260, and the second end point 262 is at the left end of the first slide groove 260. When the first slider 250 slides to the first end point 261, the first end face 211 of the support ring 210 is coplanar with the third end face 221 of the innermost splicing ring 220. When the first slider 250 slides to the second end point 262, the second end face 212 of the support ring 210 is coplanar with the fourth end face 222 of the innermost splicing ring 220. When the edge of the road base needs to be trimmed into a bevel, the first slider 250 is at the first end point 261 of the first slide groove 260. When the edge of the road base needs to be trimmed into a straight edge, the first slider 250 is at the second end point 262 of the first slide groove 260, thereby switching the cutting knife between the first working condition and the second working condition.

[0038] In one embodiment, the inner side wall of each splicing ring 220 is provided with a first slide groove 260, each first slide groove 260 extends along the axis direction of the splicing ring 220, and the outer side wall of each splicing ring 220 is fixedly provided with a second slider 270. In two adjacent splicing rings 220, the second slider 270 is slidably disposed in one first slide groove 260. When the second slider 270 slides to the first end point 261 of the first slide groove 260, the third end faces 221 of the plurality of splicing rings 220 are coplanar, thereby ensuring that the first end face 211 of the support ring 210 can smoothly be coplanar with the third end faces 221 of the plurality of splicing rings 220. When the second slider 270 slides to the second end point 262, the fourth end faces 222 of the plurality of splicing rings 220 are coplanar, thereby ensuring that the second end face 212 of the support ring 210 can smoothly be coplanar with the fourth end faces 222 of the plurality of splicing rings 220.

[0039] In one embodiment, in order to facilitate the installation of the splicing ring 220, the splicing ring 220 is divided into two halves, the two halves are fixedly connected by bolts, and the second sliding block 270 is fixedly connected to one of the halves.

[0040] In one embodiment, the inner wall of the blade 230 is provided with a second slide groove 280, the extension direction of the second slide groove 280 is parallel to the axial direction of the blade 230, the second slider 270 on the outermost splicing ring 220 is slidably arranged in the second slide groove 280, the second slide groove 280 has a third end point 281 and a fourth end point 282 in its own extension direction, when the rotating shaft 140 is in a horizontal state, the third end point 281 is at the right end of the second slide groove 280, and the fourth end point 282 is at the left end of the second slide groove 280. The blade 230 has a fifth end face 231 and a sixth end face 232, the fifth end face 231 is a conical face, the taper value of the fifth end face 231 is equal to the taper value of the fourth end face 222, then the taper value of the fifth end face 231 is equal to the taper value of the second end face 212, and the sixth end face 232 is a vertical face perpendicular to the axis of the rotating shaft 140. When the second slider 270 slides to the third end point 281, the sixth end face 232 and the first end face 211 have an angle, and when the second slider 270 slides to the fourth end point 282, the fifth end face 231 and the fourth end face 222 are coplanar. When the edge of the road base needs to be trimmed to a bevel, the second slider 270 is at the third end point 281 of the second chute 280, and the sixth end face 232 and the first end face 211 have an angle, so that the blade 230 is easy to insert into the road base; when the edge of the road base needs to be trimmed to a straight edge, the second slider 270 is at the fourth end point 282 of the second chute 280.

[0041] In one embodiment, the inner side wall of the blade 230 is provided with two sections of first thread grooves, the length of each section of the first thread groove is equal to the thickness of the blocking plate 240, and the two sections of the first thread grooves are arranged at intervals in the left-right direction. The outer side wall of the blocking plate 240 is provided with a second thread groove, and the second thread groove can be spirally connected with the first thread groove, so as to achieve the fixed connection of the blocking plate 240 to the blade 230. When the cutting knife is in the first working condition, the second thread groove on the blocking plate 240 is spirally connected with the first thread groove on the left side; when the cutting knife is in the second working condition, the second thread groove on the blocking plate 240 is spirally connected with the first thread groove on the right side, at this time, the sixth end face 232 is coplanar with the side wall of the blocking plate 240, so as to achieve the edge of the road base being trimmed into a straight edge.

[0042] In one embodiment, when the cutting blade is in the first working state, a cooling chamber 310 is formed between the blocking plate 240, the support ring 210, the plurality of splicing rings 220 and the blade 230. The blocking plate 240 is provided with a liquid injection port 320 connecting the cooling chamber 310 and the external environment, and the staff can inject coolant into the cooling chamber 310 through the liquid injection port 320, thereby ensuring that the support ring 210 and the plurality of splicing rings 220 are in a low temperature state, and when the edge of the road base is trimmed into a bevel, the probability of damage to the support ring 210 and the plurality of splicing rings 220 contacting the road base is reduced. Furthermore, a drain port 330 connecting the cooling chamber 310 and the external environment is provided on the sealing plate 240. The staff can extract the coolant in the cooling chamber 310 from the cooling chamber 310 through the drain port 330. When the cutting knife is switched from the first working condition to the second working condition, the coolant in the cooling chamber 310 is first extracted from the cooling chamber 310, thereby facilitating the switching of the cutting knife to the second working condition.

[0043] In one embodiment, a positioning sleeve 340 is provided on the rotating shaft 140, and the positioning sleeve 340 is coaxially rotatably connected with the rotating shaft 140, and the positioning sleeve 340 can be detached from the rotating shaft 140. A liquid supply channel 341 and a liquid discharge channel are provided on the positioning sleeve 340, and the liquid supply channel 341 and the liquid discharge channel are not connected to each other. A first rotating ring 370 and a second rotating ring 380 are coaxially rotatably provided on the positioning sleeve 340, and the first rotating ring 370 and the second rotating ring 380 are arranged at intervals. A first chamber is enclosed between the first rotating ring 370 and the positioning sleeve 340, and a second chamber is enclosed between the second rotating ring 380 and the positioning sleeve 340. The first chamber is always connected with the liquid supply channel 341, and the second chamber is always connected with the liquid discharge channel. The first chamber is connected with the liquid injection port 320 through a first conduit, and the second chamber is connected with the liquid discharge port 330 through a second conduit. Furthermore, a liquid supply pump and a liquid storage tank are fixedly arranged on the bracket. The liquid storage tank contains coolant. The liquid supply pump can transport the coolant in the liquid storage tank to the liquid supply channel 341. A third conduit is connected between the discharge channel and the liquid storage tank. When the cutting knife is in the first working condition and the cutting knife trims the edge of the road base, the liquid supply pump can continuously transport the coolant in the liquid supply channel 341 and prevent the first conduit and the second conduit from being entangled.

[0044] Furthermore, when the cutting knife switches from the first working condition to the second working condition, the positioning sleeve 340 is detached from the rotating shaft 140, and the first conduit is detached from the injection port 320, and the injection port 320 is blocked with a sealing plug; at the same time, the second conduit is detached from the discharge port 330, and the discharge port 330 is also blocked with a sealing plug to prevent the road base material from entering the injection port 320 and the discharge port 330.

[0045] In one embodiment, the rotating shaft 140 is provided with a first fixing nut 350 and a second fixing nut 360, and the outer wall of the rotating shaft 140 is provided with a third thread groove, the third thread groove extends along the length direction of the rotating shaft 140, and the first fixing nut 350 and the second fixing nut 360 can be threadedly connected with the third thread groove. When the cutting knife is in the first working condition or the second working condition, the first fixing nut 350 abuts against the second end face 212 of the support ring 210, and the first end face 211 of the support ring 210 abuts against the bracket, thereby limiting the support ring 210 from sliding on the rotating shaft 140. When the cutting knife is in the first working condition, the second fixing nut 360 abuts against the blocking plate 240, and at this time, the second fixing nut 360 limits the blocking plate 240 from sliding on the rotating shaft 140. When the cutting knife is in the second working condition, the second fixing nut 360 abuts against the first fixing nut 350, and the first fixing nut 350 and the second fixing nut 360 jointly limit the sliding of the support ring 210 on the rotating shaft 140.

[0046] In one embodiment, a connecting ring 410 is coaxially fixedly arranged on the first end face 211 of the support ring 210, and the connecting ring 410 abuts against the hinged beam 120 of the bracket to prevent the first end face 211 of the support ring 210 from being worn. The outer wall of the connecting ring 410 is provided with a connecting thread, and the middle part of the blocking plate 240 is provided with a connecting groove, and the inner wall of the connecting groove is provided with an auxiliary thread. When the cutting knife is in the second working state, the connecting thread and the auxiliary thread are spirally connected. At this time, the inner wall of the blocking plate 240 is connected to the connecting ring 410, and the outer wall of the blocking plate 240 is connected to the inner wall of the blade 230, and the sixth end face 232 of the blade 230 is coplanar with the side wall of the blocking plate 240, so as to trim the edge of the road base into a straight edge.

[0047] In one embodiment, a plurality of limiting protrusions 420 are provided on the rotating shaft 140, each limiting protrusion 420 can slide along the radial direction of the rotating shaft 140, and the plurality of limiting protrusions 420 are evenly distributed around the circumferential direction of the rotating shaft 140. When the rotating shaft 140 is installed on the hinged beam 120, the rotating shaft 140 is passed through the hinged beam 120 until the plurality of limiting protrusions 420 abut against the hinged beam 120, and the plurality of limiting protrusions 420 are used to limit the sliding of the rotating shaft 140 on the hinged beam 120.

[0048] Furthermore, an unlocking sleeve 430 is coaxially provided on the right end of the rotating shaft 140, and the unlocking sleeve 430 can slide along the axial direction of the rotating shaft 140. Specifically, an unlocking pin is coaxially rotatably provided on the unlocking sleeve 430, and the unlocking pin is threadedly connected to the rotating shaft 140. When the unlocking pin is rotated, the unlocking sleeve 430 slides along the axial direction of the rotating shaft 140. The unlocking sleeve 430 can squeeze multiple limiting protrusions 420 at the same time, so that the multiple limiting protrusions 420 are disengaged from the abutting hinge beam 120, thereby realizing the pulling of the rotating shaft 140 away from the hinge beam 120.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic trimming device for road base paving construction, characterized in that: include: A bracket, the bracket is connected to the road roller, and a rotating shaft in a horizontal state is rotatably arranged on the bracket; A cutting knife, wherein the cutting knife has a first working condition for trimming the edge of a road base into a beveled edge and a second working condition for trimming the edge of a road base into a straight edge; the cutting knife comprises a support ring, a plurality of splicing rings, a blade and a blocking plate, the support ring is coaxially sleeved on the outside of the rotating shaft, the support ring has a first end face and a second end face, the first end face and the second end face are conical surfaces with different taper values; the plurality of splicing rings are sleeved in sequence, the innermost splicing ring is sleeved on the outside of the support ring, the splicing ring has a third end face and a fourth end face, the third end face and the fourth end face are conical surfaces with different taper values; the taper value of the third end face is the same as the taper value of the first end face, The taper value of the fourth end face is the same as the taper value of the second end face, and the taper value of the first end face is smaller than the taper value of the second end face; the blade sleeve is arranged on the outside of the outermost splicing ring, and the thickness of the outer edge of the blade is smaller than the thickness of the inner edge of the blade; the sealing plate is coaxially connected to the rotating shaft, and the sealing plate is fixedly connected to the blade; when the cutting knife is in the first working condition, the first end face of the support ring is coplanar with the third end faces of the multiple splicing rings, and the sealing plate is in a state close to the second end face; when the cutting knife is in the second working condition, the second end face of the support ring is coplanar with the fourth end faces of the multiple splicing rings, and the sealing plate is in a state close to the first end face.

2. The automatic trimming device for road base paving construction according to claim 1, characterized in that: The support ring is coaxially slidably connected to the rotating shaft; a first slider is fixedly provided on the outer side wall of the support ring, and a first slide groove is provided on the inner side wall of the innermost splicing ring, the first slider is slidably provided in the first slide groove, and the first slide groove has a first end point and a second end point in its own extension direction, when the first slider slides to the first end point, the first end face of the support ring is coplanar with the third end face of the innermost splicing ring, and when the first slider slides to the second end point, the second end face of the support ring is coplanar with the fourth end face of the innermost splicing ring.

3. The automatic trimming device for road base paving construction according to claim 2, characterized in that: The inner side wall of each splicing ring is provided with the first sliding groove, and the outer side wall of each splicing ring is fixedly provided with a second sliding block; in two adjacent splicing rings, the second sliding block is slidably set in one of the first sliding grooves; when the second sliding block slides to the first end point, the third end faces of the plurality of splicing rings are coplanar, and when the second sliding block slides to the second end point, the fourth end faces of the plurality of splicing rings are coplanar.

4. The automatic trimming device for road base paving construction according to claim 3, characterized in that: The inner wall of the blade is provided with a second slide groove, and the second slider on the outermost splicing ring is slidably arranged in the second slide groove, and the second slide groove has a third endpoint and a fourth endpoint in its own extension direction; the blade has a fifth end face and a sixth end face, the fifth end face is a conical face, and the taper value of the fifth end face is equal to the taper value of the fourth end face; the sixth end face is a vertical face perpendicular to the rotating shaft, and when the second slider slides to the fourth endpoint, the fifth end face is coplanar with the fourth end face.

5. The automatic trimming device for road base paving construction according to claim 4, characterized in that: The inner wall of the blade is provided with two sections of first thread grooves, and the length of each section of the first thread groove is equal to the thickness of the sealing plate; the outer wall of the sealing plate is provided with a second thread groove, and the second thread groove can be spirally connected to the first thread groove; when the cutting knife is in the second working condition, the sixth end face is coplanar with the side wall of the sealing plate.

6. The automatic trimming device for road base paving construction according to claim 1, characterized in that: When the cutting knife is in the first working condition, a cooling chamber is formed between the sealing plate, the support ring, the plurality of splicing rings and the blade; an injection port and a discharge port are provided on the sealing plate, and coolant can be injected into the cooling chamber through the injection port, and the coolant in the cooling chamber can be discharged from the cooling chamber through the discharge port.

7. The automatic trimming device for road base paving construction according to claim 6, characterized in that: A positioning sleeve is provided on the rotating shaft, and a liquid supply channel and a liquid discharge channel are provided on the positioning sleeve. A first rotating ring and a second rotating ring are rotatably provided on the positioning sleeve, a first chamber is formed between the first rotating ring and the positioning sleeve, and a second chamber is formed between the second rotating ring and the positioning sleeve, the first chamber is communicated with the liquid supply channel, the second chamber is communicated with the liquid discharge channel, the first chamber is communicated with the liquid injection port, and the second chamber is communicated with the liquid discharge port.

8. The automatic trimming device for road base paving construction according to claim 1, characterized in that: The rotating shaft is provided with a first fixing nut and a second fixing nut, and the rotating shaft is provided with a third thread groove, the first fixing nut and the second fixing nut can both be threadedly connected with the third thread groove, and the first fixing nut is used to limit the sliding of the support ring on the rotating shaft; When the cutting knife is in a first working state, the second fixing nut is used to limit the blocking plate from sliding on the rotating shaft. When the cutting knife is in a second working state, the second fixing nut abuts against the first fixing nut.

9. The automatic trimming device for road base paving construction according to claim 1, characterized in that: A connecting ring is coaxially fixed on the support ring, a connecting thread is provided on the outer side wall of the connecting ring, a connecting groove is provided in the middle of the blocking plate, an auxiliary thread is provided on the inner side wall of the connecting groove, and when the cutting knife is in the second working state, the connecting thread is spirally connected to the auxiliary thread.

10. The automatic trimming device for road base paving construction according to claim 1, characterized in that: A plurality of limiting protrusions are arranged on the rotating shaft, each of the limiting protrusions can slide along the radial direction of the rotating shaft, the plurality of limiting protrusions are evenly distributed around the circumferential direction of the rotating shaft, the limiting protrusions can abut against the bracket, and the plurality of limiting protrusions are used to limit the sliding of the rotating shaft on the bracket.

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