Bulldozing mechanism for digging and loading machine

Abstract

The bulldozing mechanism comprises a bulldozing scraping plate, the bulldozing scraping plate is of a strip-shaped structure, the length of the bulldozing scraping plate is larger than the width of two crawler belts arranged on a crawler-type driving walking mechanism, the rear side of the bulldozing scraping plate is fixedly connected with a scraping plate rack, and the scraping plate rack is hinged to a connecting lug on the lower portion of the front side of a scraping plate hinge seat. The scraper hinge seat is fixedly connected to a rack of the crawler-type driving walking mechanism, cylinder rods of scraper hydraulic cylinders are hinged to the positions, close to the middle, of the upper portion of the scraper rack, cylinder seats of the scraper hydraulic cylinders are hinged to connecting lugs on the upper portion of the front side of the scraper hinge seat, and the two scraper hydraulic cylinders are arranged in a bilateral symmetry mode. And by arranging the picture pushing and leveling mechanism, the crawler-type driving walking mechanism can walk on the flat ground, so that moving operation of the earthwork excavation equipment in the foundation pit is facilitated, and the construction efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of earthwork excavation and loading equipment, and in particular relates to a bulldozing mechanism for an excavation and loading machine. Background Art

[0002] During the open excavation process of soft soil, the excavation volume is large. Usually, a large number of dump trucks are used to transport the soil directly after the excavator digs. This method is inconvenient and inefficient. It is difficult for the dump truck to move in the foundation pit of soft soil, especially for the problem of climbing slopes. If a hardened road surface is set up separately, the cost will increase, and the dump truck will also bring mud onto the road. In addition, a large number of dump trucks will cause environmental pollution.

[0003] Therefore, the technicians have proposed an integrated construction device for excavating, loading and unloading earth to excavate and transport earth. The excavator is a material-receiving device installed at the soil to be excavated. It uses a crawler-type drive walking mechanism to move around and move within the foundation pit. However, the ground at the excavation site during construction is uneven, which makes it difficult for the crawler-type drive walking mechanism to move around, and the construction is often interrupted. Manual flattening of the ground is required, which is not only time-consuming and labor-intensive, but also affects construction efficiency. Utility Model Content

[0004] The technical solution adopted by the utility model is a bulldozer mechanism for an excavator, comprising a bulldozer scraper, which is a strip structure with a length greater than the width of two crawlers provided for a crawler-type drive traveling mechanism. A scraper frame is fixedly connected to the rear side of the bulldozer scraper, the scraper frame is hinged to a connecting ear at the lower front side of a scraper articulated seat, the scraper articulated seat is fixedly connected to the frame of the crawler-type drive traveling mechanism, a cylinder rod of a scraper hydraulic cylinder is hinged near the middle above the scraper frame, a cylinder seat of the scraper hydraulic cylinder is hinged to a connecting ear at the upper front side of the scraper articulated seat, and two scraper hydraulic cylinders are used, which are arranged symmetrically on the left and right.

[0005] Furthermore, a pressure sensor is installed on the liquid inlet pipeline of the scraper hydraulic cylinder.

[0006] Furthermore, an auxiliary pressing roller is hinged at the bottom of the rear side of the bulldozer scraper, and two connecting arms are rotatably connected to the two ends of the auxiliary pressing roller through bearings. The two connecting arms are hinged to the rear side of the bulldozer scraper through a roller hinge seat, and a roller compression spring is connected to the upper side of the connecting arm, and the upper end of the roller compression spring is connected to the rear side surface of the bulldozer scraper.

[0007] Compared with the prior art, the beneficial effect of the utility model is that, by setting up a pushing and leveling mechanism, the crawler-type drive walking mechanism can walk on a flat ground, which is beneficial to the movement and operation of the earth-moving excavation equipment in the foundation pit, improves construction efficiency and saves manpower.

[0008] Among them, by adopting pressure sensors, pressure changes can be monitored in real time, thereby achieving safe walking and quick obstacle avoidance; by adding an elastically compressed auxiliary pressing roller, the scraped ground can be further squeezed and leveled to improve the flatness of the ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the bulldozer mechanism;

[0010] Figure 2 This is a schematic diagram of the backhoe loader structure;

[0011] Figure 3 It is a schematic diagram of the side cross-sectional structure of the driving wheel. DETAILED DESCRIPTION

[0012] The present invention will be further explained below in conjunction with the accompanying drawings to facilitate better understanding by those skilled in the art.

[0013] Example 1

[0014] like Figure 1-3 As shown, the bulldozer mechanism for the backhoe loader includes a bulldozer scraper 126. The bulldozer scraper 126 is a strip structure with a length greater than the width of two crawlers provided for the crawler-type drive walking mechanism. A scraper frame 127 is fixedly connected to the rear side of the bulldozer scraper 126. The scraper frame 127 is hinged to the lower connecting ear on the front side of the scraper hinge seat 128. The scraper hinge seat 128 is fixedly connected to the frame of the crawler-type drive walking mechanism. A cylinder rod of a scraper hydraulic cylinder 129 is hinged near the middle above the scraper frame 127. The cylinder seat of the scraper hydraulic cylinder 129 is hinged to the upper connecting ear on the front side of the scraper hinge seat 128. Two scraper hydraulic cylinders 129 are arranged symmetrically on the left and right. When the scraper hydraulic cylinders 129 are in use, a certain pressure is applied to squeeze the bulldozer scraper on the ground, so as to achieve scraping and level the ground to a certain extent. When not in use, the hydraulic cylinder is retracted to lift the bulldozer scraper to facilitate the movement of the equipment.

[0015] Furthermore, a pressure sensor 130 is installed on the liquid inlet pipe of the scraper hydraulic cylinder 129. When the pressure sensor 130 detects that the pressure is greater than the set value, it is judged that an obstacle such as a stone has appeared, and the scraper hydraulic cylinder 129 is controlled to retract, and the bulldozer scraper is raised. After crossing the obstacle, it is put down and continues to move forward. After using the pressure sensor 130, the pressure change can be monitored in real time, thereby achieving safe walking and quick obstacle avoidance. Because after the stone is buried in the soil, it is impossible to detect whether there is an obstacle. Therefore, the pressure sensor 130 is required to detect the pressure and be able to detect the existence of the obstacle in time, and then lift the bulldozer scraper 126 to avoid the stone and improve walking safety; in order to achieve the flatness of the ground after the bulldozer scraper 126 pushes the earth.

[0016] An auxiliary pressing roller 131 is hinged at the bottom of the rear side of the bulldozer scraper 126. Two ends of the auxiliary pressing roller 131 are rotatably connected to two connecting arms 132 through bearings. The two connecting arms 132 are hinged to the rear side of the bulldozer scraper 126 through a roller hinge seat 134. A roller compression spring 133 is connected to the upper side of the connecting arm 132. The upper end of the roller compression spring 133 is connected to the rear side surface of the bulldozer scraper 126. By adding an elastically compressed auxiliary pressing roller 131, the scraped ground can be further squeezed and leveled to improve the flatness of the ground.

[0017] The bulldozer mechanism for backhoe loader is used in conjunction with the backhoe loader, which includes a crawler-type driving walking mechanism 101 and a bucket wheel reclaimer 102 mounted on the crawler-type driving walking mechanism 101. The bucket wheel reclaimer 102 includes a driving wheel disc 103 and a bucket 104 evenly mounted on the driving wheel disc 103 in the circumferential direction. The driving wheel disc 103 is rotatably connected to one side of the end of the frame 105 and is connected to a power mechanism that drives it to rotate. The frame 105 is cantilevered and mounted on a mounting frame 121 fixedly connected to the electric turntable 116. The power mechanism includes a wheel disc drive motor. 122, a universal coupling 123 and a power gearbox 124, the wheel drive motor 122 is fixedly connected to one side of the frame 105 and close to the frame hinge, so that the wheel drive motor 122 is as far as possible above the crawler drive walking mechanism 101, the motor shaft of the wheel drive motor 122 is connected to the input shaft of the power gearbox 124 through the universal coupling 123, the power gearbox 124 is installed on the side of the frame 105 and the output shaft of the power gearbox 124 is connected to the power shaft 125, the power shaft 125 is rotatably connected to the frame through the bearing and is extended The rear side of the frame 105 is fixedly connected to the driving wheel disc 103, and the electric turntable 116 is installed on the frame of the crawler-type driving walking mechanism 101. The crawler-type driving walking mechanism 101 adopts pure electric drive. The driving wheel disc 103 is a cavity structure, and the side facing the frame 105 is open. The circumferential side wall is provided with a leakage hole 106. The bucket 104 is installed at the leakage hole 106. The bottom of the bucket 104 is hollowed out 108. The hollow 108 is densely covered with multiple chains 107 in the longitudinal direction and can be in a drooping state. After the hollow part of the bucket is set, the hollow part is filled with a chain. Its purpose is to prevent soft soil from sticking to the bucket, making it impossible to effectively dig and discharge it. After the chain is filled, the contact area between the chain and the soil is reduced, and it will not be squeezed too much to cause bonding problems. It is more conducive to the excavated soil falling into the aggregate hopper and being discharged. The chain has its own weight. When the chain is in a free hanging state, after digging the soil, when it is above the aggregate hopper, the bucket stands upside down. Under the action of the gravity of the chain, it is also more conducive to the soil falling and discharging. In addition, there is vibration during the operation of the entire equipment, which is also conducive to cooperating with the chain structure to discharge the bucket.

[0018] One side of the cavity of the driving wheel extends into the inclined feed hopper 113, and the bottom of the feed hopper 113 is opposite to the roller belt conveyor 114. The roller belt conveyor 114 is installed in the width direction of the frame 105. When the driving wheel rotates, the soil is excavated into the bucket and then moved to the highest end, the soil falls from the bucket and falls into the feed hopper 113 from the leakage hole. The other end of the roller belt conveyor 114 is connected to the feed hopper of the roller belt conveyor 115. The discharge port of the roller belt conveyor 115 is opposite to the feed hopper of the mobile telescopic conveyor. One end of the frame of the roller belt conveyor 115 is hinged on the electric turntable 116, and the other end is hinged to one end of the connecting rod 117. The other end of the connecting rod 117 is hinged to a connecting ear set on the left side of the bottom of the driving seat 118. The other connecting ear on the right side of the bottom of the driving seat 118 is hinged to the cylinder rod end of the pitch telescopic hydraulic cylinder 119. The cylinder seat of cylinder 119 is hinged on the frame of roller belt conveyor 115 and the hinge is located on the right side of the hinge between connecting rod 117 and the frame to form a connecting rod group mechanism. Two sets of connecting rod group mechanisms are installed on both sides of the frame. The right ends of two driving seats 118 are hinged on the ends of cantilever frame 120. Cantilever frame 120 is fixedly connected to the mounting frame 121 fixedly installed on electric turntable 116. Electric turntable 116 is installed on the frame of crawler drive walking mechanism 4 101. When in use, by controlling the shortening of pitch telescopic hydraulic cylinder 119, roller belt conveyor 2 is raised and extended, and roller belt conveyor 1 is lowered. The connecting rod group mechanism can realize the pitch angle adjustment of the roller belt conveyor within a certain range. The electric turntable 116 is set to realize the left and right swing of bucket wheel reclaimer 102 and the swing of roller belt conveyor 2. On the one hand, it realizes large-scale excavation, and on the other hand, it realizes docking with the telescopic mobile conveyor.

[0019] The above-mentioned embodiments are only for describing the preferred implementation of the utility model, and are not intended to limit the scope of the utility model. Without departing from the design spirit and principle of the utility model, various modifications and improvements made by those skilled in the art to the technical solution of the utility model shall fall within the protection scope determined by the claims of the utility model.

Claims

1. A bulldozing mechanism for an excavator, characterized in that: The invention comprises a bulldozer scraper (126), which is a strip-shaped structure and has a length greater than the width of two crawlers provided on a crawler-type driving walking mechanism. A scraper frame (127) is fixedly connected to the rear side of the bulldozer scraper (126), the scraper frame (127) is hinged to the front lower connecting ear of a scraper hinge seat (128), the scraper hinge seat (128) is fixedly connected to the frame of the crawler-type driving walking mechanism, a cylinder rod of a scraper hydraulic cylinder (129) is hinged near the middle of the scraper frame (127), the cylinder seat of the scraper hydraulic cylinder (129) is hinged to the front upper connecting ear of the scraper hinge seat (128), and two scraper hydraulic cylinders (129) are used and are arranged symmetrically on the left and right.

2. The bulldozing mechanism for an excavator according to claim 1, characterized in that: A pressure sensor (130) is installed on the liquid inlet pipeline of the scraper hydraulic cylinder (129).

3. The bulldozing mechanism for an excavator according to claim 1, characterized in that: An auxiliary pressing roller (131) is hingedly connected to the bottom of the rear side of the bulldozer scraper (126); two ends of the auxiliary pressing roller (131) are rotatably connected to two connecting arms (132) via bearings; the two connecting arms (132) are hingedly connected to the rear side of the bulldozer scraper (126) via a roller hinge seat (134); a roller compression spring (133) is connected to the upper side of the connecting arm (132); and the upper end of the roller compression spring (133) is connected to the rear side surface of the bulldozer scraper (126).

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