Pavement joint cutting device of asphalt road roller

Abstract

The utility model discloses a pavement joint-cutting device of an asphalt road roller, which relates to the technical field of asphalt pavement joint-cutting and comprises a chassis, the top of the chassis is fixedly connected with an outer shell, and the bottom of the chassis is rotatably connected with four first rollers through two first rotating shafts. And two second rolling wheels are symmetrically and rotationally connected to the peripheral faces of the two first rolling wheels located on the right side in a sleeving mode, two hydraulic cylinders are symmetrically and fixedly connected to the front face of the outer shell, and a fixing plate is fixedly connected between the output ends of the two hydraulic cylinders. During use, the rotating force of the first rotating shaft on the right side is transmitted to the pressing assembly through the arranged transmission assembly to drive the four cutting knives to move downwards for joint cutting work, so that no extra power source is needed when the four cutting knives are controlled to move downwards, a power system is simplified, and the manufacturing cost and the subsequent maintenance and use cost of the device are reduced; and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of asphalt pavement cutting, in particular to an asphalt roller pavement cutting device. Background Art

[0002] Asphalt pavement refers to various types of pavement constructed by blending road asphalt with mineral materials. The asphalt binder improves the paving aggregate's ability to withstand damage from traffic and natural factors, resulting in a smooth, dust-free, impermeable, and durable surface. Therefore, asphalt pavement is the most widely used high-quality pavement in road construction.

[0003] Asphalt pavement is composed of several layers: subgrade, base course, and surface course. The surface course is most susceptible to cracking due to weather conditions and traffic volume. To prevent cracking, the pavement is cut into smaller sections during construction to allow for free expansion and contraction, reducing stress and ensuring stability.

[0004] The Chinese utility model patent application number CN202321258728.5 records an asphalt roller pavement cutting device, which controls the depth of the pavement cut by the four cutting discs by controlling the length of the hydraulic push rod output shaft and moving the lifting plate downward in turn. The four cutting discs deepen the gap step by step to avoid a single cutting disc cutting the pavement. The pavement is cut by four cutting discs, and the gap cut by each cutting disc is shallow, and the pressure on the tool is low, which avoids tool jamming and damage to the cutting disc, and is conducive to increasing the speed of asphalt pavement cutting. However, the four cutting discs in the above device are driven to rise and fall by four hydraulic push rods, which makes the hydraulic system oil circuit of the device more complicated, increases the cost of the device and the cost of subsequent use and maintenance. Utility Model Content

[0005] The purpose of the present application is to provide a pavement cutting device for an asphalt roller, so as to solve the problem proposed in the above background technology that the four cutting discs are driven to rise and fall by four hydraulic push rods, which makes the hydraulic system oil circuit of the device more complicated, increases the cost of the device and the cost of subsequent use and maintenance.

[0006] To achieve the above-mentioned objectives, the present application provides the following technical solutions: an asphalt roller pavement cutting device, comprising a chassis, an outer shell fixedly connected to the top of the chassis, four first rollers rotatably connected to the bottom of the chassis through two first rotating shafts, two second rollers symmetrically rotatably sleeved on the outer circumferences of the two first rollers located on the right side, two hydraulic cylinders symmetrically fixedly connected to the front side of the outer shell, a fixed plate fixedly connected between the output ends of the two hydraulic cylinders, four cutting knives are sequentially installed on the bottom of the fixed plate from left to right, the four cutting knives are fixedly connected to a motor, a transmission assembly is also included at the bottom of the chassis, and a pressing assembly is also included on the fixed plate, the transmission assembly transmits the rotational force of the first rotating shaft located on the right side to the pressing assembly to press the four cutting knives to move downward.

[0007] The transmission unit is a first gear fixedly mounted on the outer circumference of the first rotating shaft on the right side, and the transmission unit also includes a second gear rotatably connected to the bottom of the chassis through the second rotating shaft, the second gear is meshed with the first gear, the front end of the second rotating shaft is fixedly mounted on the first bevel gear, the bottom of the chassis is rotatably connected to the second bevel gear and the third rotating shaft through two ear plates, the second bevel gear and the first bevel gear are meshed with the first bevel gear. The outer circumference of the third rotating shaft is fixedly mounted on four externally threaded tubes from left to right, and the pitch of the four externally threaded tubes gradually decreases from left to right, and the external threaded surfaces of the four externally threaded tubes are threadedly mounted on moving plates, and the front faces of the four moving plates are fixedly connected to push rods, and a limiting plate is fixedly connected between the two ear plates, and the tops of the four moving plates are connected by sliders and slides. The groove is slidably connected to the bottom of the limit plate, and also includes a linkage assembly for linking the first roller and the second roller. The advantage of this arrangement is that it can push the device to move on the road surface while driving the four push rods to move to the right through the transmission assembly to push the four cutting knives downward through the pressing assembly, thereby eliminating the need for an additional power source, simplifying the power system of the device, reducing the cost of the device and the cost of subsequent maintenance and use, and improving the practicality of the device. The pitch of the four externally threaded tubes gradually decreases from left to right, which can make the speed of the four push rods moving to the right gradually decrease from left to right, and then the speed of the four cutting knives descending from left to right can be gradually reduced from left to right through the pressing assembly, so that the four cutting knives can participate in the slitting work in sequence and orderly, ensuring that the slitting work proceeds smoothly.

[0008] Preferably, the pressing assembly includes four straight rods movably inserted in the top of the fixed plate, the tops of the four straight rods are fixedly connected to the first wedge blocks, the bottoms of the four first wedge blocks are fixedly connected to the top of the fixed plate, the bottom ends of the four straight rods pass through the fixed plate and are fixedly connected to the motor through a fixed sleeve, the top of the fixed plate is fixedly connected to the limit frame through a support rod, and the four limit blocks are slidably connected to the limit frame through sliders and slide grooves, and the limit blocks are made of iron, and the front faces of the four limit blocks are fixedly connected to the second wedge blocks, and the inclined surfaces of the four second wedge blocks respectively conflict with the four first wedge blocks, and the backs of the four limit blocks are fixedly connected to the push plates, and the four push rods are respectively connected to four The left side of the push plate conflicts with each other, and four first electromagnets are fixedly connected in the limit frame. The four first electromagnets and the four limit blocks are alternately distributed, and the angle between the four first wedge blocks and the horizontal plane gradually decreases from left to right. The advantage of this arrangement is that since the angle between the four first wedge blocks and the horizontal plane gradually decreases from left to right, when the push plate moves to the right to the maximum stroke, the distance that the four cutting knives descend from left to right gradually decreases, thereby ensuring that the cutting depth of the four cutting knives gradually deepens, thereby reducing the cutting depth of each cutting knife and preventing the occurrence of knife jamming problems. At the same time, the first electromagnet absorbs the limit block, so that the position of the cutting knife can be kept fixed, thereby ensuring that the slitting work is carried out smoothly.

[0009] The two wheels are symmetrically connected to each other on the front and rear sides of the chassis, and the two sides of the two straight plates are symmetrically fixedly connected to two second electromagnets, and the sides of the two straight plates are symmetrically connected to the two rotating plates by a rotating rod, and the sides of the two rotating plates are symmetrically fixedly connected to the two first plug rods, and the sides of the two rotating plates are symmetrically movably inserted into the two second plug rods, and the first plug rod and the second plug rod are respectively inserted into the second roller side and the first roller side through the first plug hole and the second plug hole. The two second plug rods are symmetrically fixedly connected to the ends away from each other, and a second elastic member is fixedly connected between the iron block and the adjacent rotating plate side, and the iron block can be attracted by the second electromagnet. The advantage of this arrangement is that the second iron block can be attracted or released by the power supply or de-powering of the second electromagnet, thereby realizing the separate rolling or mutual linkage of the second roller and the first roller, thereby controlling whether the transmission assembly can transmit the rotational force of the right first rotating shaft to the pressing assembly, thereby controlling whether the cutting knife can be lowered or not.

[0010] In summary, the technical effects and advantages of the utility model are:

[0011] 1. In the present invention, the rotational force of the first rotating shaft on the right is transmitted to the pressing assembly through the transmission assembly to drive the four cutting knives to move downward to perform the slitting work. In this way, no additional power source is required to control the downward movement of the four cutting knives, which simplifies the power system, reduces the cost of the device and the subsequent maintenance and use costs, and improves the practicality of the device.

[0012] 2. In the present invention, by providing the first electromagnet and the linkage assembly, the first electromagnet can adsorb the limit block so that the position of the limit block and the cutting knife can be fixed. In this way, even if the transmission assembly no longer transmits the rotational force of the first rotating shaft on the right to the pressing assembly under the action of the linkage assembly, the cutting knife can still perform the cutting work stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 This is a first structural schematic diagram of a pavement cutting device for an asphalt roller in an embodiment of the present application;

[0015] Figure 2 This is a second structural schematic diagram of a pavement cutting device for an asphalt roller in an embodiment of the present application;

[0016] Figure 3 This is a third structural schematic diagram of a pavement cutting device for an asphalt roller in an embodiment of the present application;

[0017] Figure 4 This is a partial structural diagram of a pavement cutting device for an asphalt roller in an embodiment of the present application;

[0018] Figure 5 This is a schematic structural diagram of the pressing assembly in an embodiment of the present application;

[0019] Figure 6 In the embodiment of this application Figure 3 Enlarged schematic diagram of point A in the middle.

[0020] In the figure: 1. chassis; 2. outer shell; 3. first roller; 4. second roller; 5. hydraulic cylinder; 6. fixed plate; 7. cutting knife; 71. motor; 8. transmission assembly; 81. first gear; 82. second gear; 83. first bevel gear; 84. second bevel gear; 85. external threaded pipe; 86. movable plate; 87. push rod; 88. limit plate; 9. pressing assembly; 91. straight rod; 92. first wedge block; 93. first elastic member; 94. limit frame; 95. limit block; 96. second wedge block; 97. push plate; 98. first electromagnet; 10. linkage assembly; 101. straight plate; 102. second electromagnet; 103. rotating rod; 104. rotating plate; 105. first plug rod; 106. second plug rod; 107. iron block; 108. second elastic member. DETAILED DESCRIPTION

[0021] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0022] Example 1

[0023] Please refer to Figure 1-6 The asphalt roller pavement cutting device shown includes a chassis 1, an outer shell 2 fixedly connected to the top of the chassis 1, a diesel engine installed in the outer shell 2 as a power source, and required systems and components such as the power system and the cooling system are also installed in the outer shell 2. Four first rollers 3 are rotatably connected to the bottom of the chassis 1 through two first rotating shafts, and two second rollers 4 are symmetrically rotatably sleeved on the outer circumference of the two first rollers 3 on the right side. Two hydraulic cylinders 5 are symmetrically fixedly connected to the front of the outer shell 2, and a fixed plate 6 is fixedly connected between the output ends of the two hydraulic cylinders 5. Four cutting knives 7 are installed in sequence from left to right on the bottom of the fixed plate 6, and the four cutting knives 7 are fixedly connected to the motor 71. It also includes a transmission assembly 8 arranged at the bottom of the chassis 1, and a pressing assembly 9 arranged on the fixed plate 6. The transmission assembly 8 transmits the rotational force of the first rotating shaft located on the right to the pressing assembly 9 to press the four cutting knives 7 to move downward.

[0024] refer to Figure 1-4The transmission assembly 8 includes a first gear 81 fixedly sleeved on the outer circumference of the first rotating shaft on the right side, and the transmission assembly 8 also includes a second gear 82 rotatably connected to the bottom of the chassis 1 through the second rotating shaft, and the second gear 82 is meshed with the first gear 81. The front end of the second rotating shaft is fixedly sleeved with a first bevel gear 83, and the bottom of the chassis 1 is rotatably connected to the second bevel gear 84 through two ear plates and the third rotating shaft. The second bevel gear 84 is meshed with the first bevel gear 83. The outer circumference of the third rotating shaft is fixedly sleeved with four externally threaded tubes 85 from left to right, and the pitch of the four externally threaded tubes 85 gradually decreases from left to right. The external thread surfaces of the four externally threaded tubes 85 are all threadedly sleeved with movable plates 86, and the front faces of the four movable plates 86 are fixedly connected with push rods 87. A limiting plate 88 is fixedly connected between the two ear plates, and the tops of the four movable plates 86 are slidably connected to the bottom of the limiting plate 88 through sliders and slide grooves. It also includes a linkage assembly 10 for linking the first roller 3 and the second roller 4.

[0025] Specifically, the device can be pushed to move on the road surface while the four push rods 87 are driven to move to the right through the transmission assembly 8 to push the four cutting knives 7 downward through the pressing assembly 9, thereby eliminating the need for an additional power source, simplifying the power system of the device, reducing the cost of the device and the cost of subsequent maintenance and use, and improving the practicality of the device. In addition, the pitch of the four externally threaded tubes 85 gradually decreases from left to right, which can make the speed of the four push rods 87 moving to the right gradually decrease from left to right, and then the speed of the four cutting knives 7 descending from left to right can be gradually reduced through the pressing assembly 9. In this way, the four cutting knives 7 can participate in the slitting work in sequence and orderly, ensuring that the slitting work proceeds smoothly.

[0026] refer to Figure 1 、 2 , 3 and 5, the pressing assembly 9 includes four straight rods 91 movably plugged into the top of the fixed plate 6, the tops of the four straight rods 91 are fixedly connected to the first wedge blocks 92, the bottoms of the four first wedge blocks 92 are fixedly connected to the top of the fixed plate 6 with a first elastic member 93, the bottom ends of the four straight rods 91 pass through the fixed plate 6 and are fixedly connected to the motor 71 through a fixed sleeve, the top of the fixed plate 6 is fixedly connected to the limit frame 94 through a support rod, and the limit frame 94 is slidably connected with four limit blocks 95 through sliders and slide grooves, and the limit blocks 95 is made of iron. The front faces of the four limit blocks 95 are fixedly connected to the second wedge blocks 96. The inclined surfaces of the four second wedge blocks 96 respectively conflict with the four first wedge blocks 92. The back faces of the four limit blocks 95 are fixedly connected to the push plates 97. The four push rods 87 respectively conflict with the left sides of the four push plates 97. Four first electromagnets 98 are fixedly connected to the limit frame 94. The four first electromagnets 98 and the four limit blocks 95 are alternately distributed. The angles between the four first wedge blocks 92 and the horizontal plane gradually decrease from left to right.

[0027] Specifically, since the angle between the four first wedge blocks 92 and the horizontal plane gradually decreases from left to right, when the push plate 97 moves to the right to the maximum stroke, the distance that the four cutting knives 7 descend from left to right gradually decreases, thereby ensuring that the cutting depth of the four cutting knives 7 gradually deepens, thereby reducing the cutting depth of each cutting knife 7 and preventing the occurrence of knife jamming problems. At the same time, the first electromagnet 98 absorbs the limit block 95, so that the position of the cutting knife 7 can be kept fixed, thereby ensuring that the cutting work proceeds smoothly.

[0028] Example 2

[0029] According to Example 1, please refer to Figure 1 、 2 and 6. The linkage assembly 10 includes two straight plates 101 symmetrically fixedly connected to the front and rear side surfaces of the chassis 1, two second electromagnets 102 are symmetrically fixedly connected to the adjacent sides of the two straight plates 101, two rotating plates 104 are symmetrically rotatably connected to the adjacent sides of the two straight plates 101 through a rotating rod 103, two first plug rods 105 are symmetrically fixedly connected to the adjacent sides of the two rotating plates 104, two second plug rods 106 are symmetrically movably plugged into the adjacent sides of the two rotating plates 104, the first plug rod 105 and the second plug rod 106 are respectively inserted into the side surface of the second roller 4 and the side surface of the first roller 3 through the first plug hole and the second plug hole, the two second plug rods 106 are symmetrically fixedly connected to the distant ends of the two second plug rods 107, a second elastic member 108 is fixedly connected between the iron block 107 and the side surface of the adjacent rotating plate 104, and the iron block 107 can be adsorbed by the second electromagnet 102.

[0030] Specifically, the second iron block 107 is attracted or released by energizing or de-energizing the second electromagnet 102, thereby realizing the separate rolling or mutual linkage of the second roller 4 and the first roller 3, and thereby controlling whether the transmission component 8 can transmit the rotational force of the first rotating shaft on the right to the pressing component 9, and thereby controlling whether the cutting knife 7 descends or not.

[0031] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pavement cutting device for an asphalt roller, comprising a chassis (1), a top of the chassis (1) fixedly connected to an outer shell (2), and a bottom of the chassis (1) rotatably connected to four first rollers (3) via two first rotating shafts, characterized in that: Two second rollers (4) are symmetrically rotatably sleeved on the outer circumferences of the two first rollers (3) located on the right side. Two hydraulic cylinders (5) are symmetrically fixedly connected to the front of the outer shell (2). A fixed plate (6) is fixedly connected between the output ends of the two hydraulic cylinders (5). Four cutting knives (7) are sequentially installed on the bottom of the fixed plate (6) from left to right. The four cutting knives (7) are all fixedly connected to a motor (71). The outer shell (2) further includes a transmission assembly (8) located at the bottom of the chassis (1) and a pressing assembly (9) located on the fixed plate (6). The transmission assembly (8) transmits the rotational force of the first rotating shaft located on the right side to the pressing assembly (9) to press the four cutting knives (7) downward.

2. The asphalt roller pavement cutting device according to claim 1, characterized in that: The transmission assembly (8) includes a first gear (81) fixedly sleeved on the outer peripheral surface of the first rotating shaft on the right side, and the transmission assembly (8) also includes a second gear (82) rotatably connected to the bottom of the chassis (1) through the second rotating shaft, the second gear (82) and the first gear (81) are meshed, the front end of the second rotating shaft is fixedly sleeved with a first bevel gear (83), the bottom of the chassis (1) is rotatably connected to the third rotating shaft through two ear plates, the second bevel gear (84) and the first bevel gear (83) are meshed, and the outer peripheral surface of the third rotating shaft is provided with a bevel gear (84) which is meshed with the first bevel gear (83). Four externally threaded tubes (85) are fixedly sleeved in sequence from left to right, and the pitch of the four externally threaded tubes (85) gradually decreases from left to right. The external thread surfaces of the four externally threaded tubes (85) are all threadedly sleeved with movable plates (86). The front faces of the four movable plates (86) are all fixedly connected with push rods (87). A limiting plate (88) is fixedly connected between the two ear plates. The tops of the four movable plates (86) are slidably connected to the bottoms of the limiting plates (88) through sliders and slide grooves. The movable plates (86) also include a linkage assembly (10) for linking the first roller (3) and the second roller (4).

3. The pavement cutting device for an asphalt roller according to claim 2, characterized in that: The pressing assembly (9) includes four straight rods (91) movably plugged into the top of the fixed plate (6), the tops of the four straight rods (91) are fixedly connected to a first wedge block (92), the bottoms of the four first wedge blocks (92) are fixedly connected to the top of the fixed plate (6) with a first elastic member (93), the bottom ends of the four straight rods (91) pass through the fixed plate (6) and are fixedly connected to the motor (71) through a fixed sleeve, the top of the fixed plate (6) is fixedly connected to a limit frame (94) through a support rod, and four limit blocks (95) are slidably connected in the limit frame (94) through a slider and a slide groove, and the limit blocks (95) is made of iron. The front faces of the four limit blocks (95) are fixedly connected with second wedge blocks (96). The inclined surfaces of the four second wedge blocks (96) respectively conflict with the four first wedge blocks (92). The back faces of the four limit blocks (95) are fixedly connected with push plates (97). The four push rods (87) respectively conflict with the left sides of the four push plates (97). Four first electromagnets (98) are fixedly connected in the limit frame (94). The four first electromagnets (98) and the four limit blocks (95) are alternately distributed. The angles between the four first wedge blocks (92) and the horizontal plane gradually decrease from left to right.

4. The asphalt roller pavement cutting device according to claim 3, characterized in that: The linkage assembly (10) comprises two straight plates (101) symmetrically fixedly connected to the front and rear sides of the chassis (1); the adjacent sides of the two straight plates (101) are symmetrically fixedly connected to two second electromagnets (102); the adjacent sides of the two straight plates (101) are symmetrically rotatably connected to two rotating plates (104) via rotating rods (103); the adjacent sides of the two rotating plates (104) are symmetrically fixedly connected to two first plug rods (105); the adjacent sides of the two rotating plates (104) are symmetrically fixedly connected to the two first plug rods (105); There are two second plug rods (106) that are movably connected. The first plug rod (105) and the second plug rod (106) are respectively inserted into the side of the second roller (4) and the side of the first roller (3) through the first plug hole and the second plug hole. Two iron blocks (107) are symmetrically fixedly connected to the ends of the two second plug rods (106) that are away from each other. A second elastic member (108) is fixedly connected between the iron block (107) and the side of the adjacent rotating plate (104). The iron block (107) can be adsorbed by the second electromagnet (102).

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