A bottom puller for a reclaimer

Abstract

This invention relates to the field of tunnel construction technology, and more particularly to a bottom-pulling device for a transfer machine. It includes a connecting seat, a slewing bearing, a base, and a bottom-pulling assembly. The bottom-pulling assembly is hinged to the top of the base, and the bottom of the base is rotatably connected to the top of the connecting seat via the slewing bearing. The inner ring of the slewing bearing is fixedly connected to the connecting seat, and the outer ring is fixedly connected to the base, allowing the bottom-pulling assembly to rotate 360° horizontally relative to the connecting seat with the base. The bottom of the connecting seat can be detachably connected to the transfer machine used in coal mines. This device can be easily installed on existing transfer equipment, enabling the existing transfer machine to have a bottom-pulling function, eliminating the need for manual bottom-pulling operations. It also eliminates the need for a separate power source and walking mechanism for this bottom-pulling device, fully utilizing the existing high-pressure hydraulic system and track walking capability of the transfer machine, achieving expanded equipment functionality and multi-purpose use, and significantly reducing equipment investment costs.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction technology, and in particular to a bottom-pulling device for a transfer machine. Background Technology

[0002] During coal mining, the floor of roadways deforms and bulges (commonly known as "floor heave") due to mining activity and ground pressure, severely impacting normal ventilation, transportation, and personnel safety. According to the "Coal Mine Safety Regulations," floor shoveling operations must be performed in both roadways of the mining face and in areas with severe floor heave to ensure the roadway cross-section meets design requirements. Traditional floor shoveling is done manually, with workers using shovels, pneumatic picks, and other tools to break and clear the hard floor rock in narrow roadways. Manually operating pneumatic picks to break the hard floor in confined spaces with dense personnel greatly increases the risk of tool collisions or flying rock fragments causing injury. Furthermore, the process generates large amounts of coal and rock dust, and the lack of effective dust control measures poses a serious threat to workers' occupational health, easily leading to pneumoconiosis and other occupational diseases. Purely manual rock breaking and removal results in extreme physical exertion for workers, accelerating fatigue and making it difficult to maintain continuous and efficient operation. Therefore, this type of operation is labor-intensive and inefficient, requiring multiple people to work together to complete it.

[0003] Therefore, there is an urgent need for a roadway bottom-pulling device that is highly mechanized, safe to operate, and can effectively reduce dust hazards, in order to replace the traditional manual bottom-pulling method, ensure the safety of operators, and improve bottom-pulling efficiency and quality. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a bottom-pulling device for a transfer machine, which solves the problems of poor safety, dust hazards, high labor intensity, low efficiency, and the need for multiple people to work together to complete the existing bottom-pulling operation.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0008] This invention provides a bottom-pulling device for a transfer machine, comprising a connecting seat, a slewing bearing, a base, and a bottom-pulling assembly. The bottom-pulling assembly is hinged to the top of the base, and the bottom of the base is rotatably connected to the top of the connecting seat via the slewing bearing. The inner ring of the slewing bearing is fixedly connected to the connecting seat, and the outer ring of the slewing bearing is fixedly connected to the base, allowing the bottom-pulling assembly to rotate 360° horizontally relative to the connecting seat with the base. The bottom of the connecting seat can be detachably connected to the transfer machine, and the power for the bottom-pulling assembly is provided by the hydraulic pump station of the transfer machine.

[0009] Optionally, the bottom-pull assembly includes a boom, a forearm, and a bucket. The base of the boom is hinged to a base, and a first hydraulic drive mechanism is provided between the two for driving the boom to pitch relative to the base. The base of the forearm is hinged to the end of the boom, and a second hydraulic drive mechanism is provided between the two for driving the forearm to pitch relative to the boom. The bucket is hinged to the end of the forearm, and a third hydraulic drive mechanism is provided between the two for driving the bucket to perform a tilting digging action relative to the forearm.

[0010] Optionally, the first hydraulic drive mechanism, the second hydraulic drive mechanism, and the third hydraulic drive mechanism are all double-acting hydraulic cylinders, and the hydraulic control oil circuits of the three are all connected to the hydraulic system of the transfer machine to provide power to the bottom-pulling assembly through the hydraulic pump station of the transfer machine.

[0011] Optionally, the system also includes a hydraulic control system comprising a multi-way directional valve assembly, a flow distribution valve, and a pilot control valve. The multi-way directional valve assembly is connected to the oil ports of the first, second, and third hydraulic drive mechanisms, respectively, for individually controlling the extension, retraction, or stopping of each hydraulic drive mechanism. The flow distribution valve is located between the transfer machine's hydraulic system and the multi-way directional valve assembly, for distributing the flow of hydraulic oil between the transfer machine's traveling mechanism and the bottom-pulling assembly. The pilot control valve is connected to the multi-way directional valve assembly, for receiving operating commands and controlling the movement of the valve core of the multi-way directional valve assembly.

[0012] Optionally, a handheld remote control is also included. This handheld remote control has an operating joystick or button and a built-in wireless transmitter. A wireless receiver, electrically connected to the pilot control valve, is located on the base. The handheld remote control can send operating commands from the wireless transmitter to the wireless receiver to remotely control the bottom-pulling assembly.

[0013] Optionally, an automatic dust suppression system is also included. The automatic dust suppression system includes high-pressure spray nozzles, a water supply line, and a solenoid control valve. The high-pressure spray nozzles are located on the boom or arm above the bucket, and the spray direction of the high-pressure spray nozzles is towards the digging area of ​​the bucket. One end of the water supply line is connected to the high-pressure spray nozzles, and the other end is connected to the water supply system on the transfer machine. The solenoid control valve is located on the water supply line and is electrically connected to the hydraulic control system.

[0014] When the first hydraulic drive mechanism, the second hydraulic drive mechanism, and the third hydraulic drive mechanism are activated, the hydraulic control system can selectively control the opening of the solenoid control valve to spray dust into the excavation area.

[0015] Optionally, the base and the boom, the forearm and the bucket, and the boom and the forearm are all hinged by pin assemblies, and self-lubricating spherical bearings are provided at each hinge point.

[0016] Optionally, the bucket mouth edge is provided with detachable bucket teeth, which are detachably connected to the bucket by pins or bolts.

[0017] Optionally, the transfer mechanism and the connecting seat, the connecting seat and the slewing bearing, and the slewing bearing and the base are connected by a first connecting assembly, a second connecting assembly, and a third connecting assembly, respectively. Each of the first, second, and third connecting assemblies includes a plurality of threaded fasteners evenly distributed circumferentially.

[0018] Optionally, the connecting seat, base and pull-down assembly are all made of mining high-strength structural steel and are all coated with anti-corrosion coating.

[0019] (III) Beneficial Effects

[0020] The beneficial effects of this invention are:

[0021] This invention provides a bottom-pulling device for a transfer machine, which can be easily installed on existing transfer equipment via a connecting seat, enabling the existing transfer machine to perform bottom-pulling functions without the need for manual bottom-pulling operations. Simultaneously, it eliminates the need for a separate power source and walking mechanism for the bottom-pulling device, fully utilizing the existing transfer machine's high-pressure hydraulic system and tracked walking capability, thus expanding the equipment's functionality and achieving multi-purpose use, significantly reducing equipment investment costs. Furthermore, a slewing bearing is installed between the bottom-pulling component and the transfer machine, giving the entire bottom-pulling device flexible operation capabilities. In actual tunnel operations, operators do not need to frequently move the large transfer machine; simply driving the bottom-pulling component to rotate horizontally can cover a wide area on both sides of the tunnel floor and in front of the transfer machine, greatly expanding the working range after a single equipment positioning and significantly improving the coverage efficiency and overall progress of the bottom-pulling operation. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment 1 of a bottom-pulling device for a transfer machine according to the present invention;

[0023] Figure 2 for Figure 1 Front view of the bottom-pulling device in the middle;

[0024] Figure 3 for Figure 2 A magnified view of a portion of region A in the middle;

[0025] Figure 4 for Figure 1 A top view of the bottom-pulling device in the middle;

[0026] Figure 5 for Figure 4A magnified view of a portion of region B in the middle.

[0027] [Explanation of Labels in the Attached Image]

[0028] 1: Connector;

[0029] 2: Slewing bearing;

[0030] 3: Base;

[0031] 4: Upper arm;

[0032] 5: Forearm;

[0033] 6: Bucket; 61: Detachable bucket teeth;

[0034] 7: First hydraulic drive mechanism;

[0035] 8: Second hydraulic drive mechanism;

[0036] 9: Third hydraulic drive mechanism. Detailed Implementation

[0037] To better explain and facilitate understanding of the present invention, a detailed description of the invention is provided below with reference to the accompanying drawings and specific embodiments. In this document, directional terms such as "up," "down," "left," and "right" are used interchangeably. Figure 1 The orientation is used as a reference.

[0038] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0039] Example 1:

[0040] Reference Figures 1 to 5 This embodiment proposes a bottom-pulling device for a transfer machine, which can be detachably installed on a transfer machine commonly used in underground coal mines to achieve efficient, safe, and low-dust bottom-pulling operations in the roadway. The device includes a connecting seat 1, a slewing bearing 2, a base 3, and a bottom-pulling assembly. The bottom-pulling assembly is hinged to the top of the base 3, and the bottom of the base 3 is rotatably connected to the top of the connecting seat 1 through the slewing bearing 2.

[0041] The connecting seat 1 is the mounting base of the entire device. Its bottom is equipped with a mounting structure (e.g., a connecting flange with bolt holes) that matches the coal mine transfer conveyor. The connecting seat 1 is fixedly connected to the transfer conveyor via a first connecting assembly, allowing it to be easily and securely detachably connected to a suitable position on the transfer conveyor body. Figure 3 As shown, the inner ring of the slewing bearing 2 is fixedly connected to the top of the connecting seat 1 via the second connecting assembly, and the outer ring of the slewing bearing 2 is fixedly connected to the bottom of the base 3 via the third connecting assembly. The slewing bearing 3 is the core component connecting the connecting seat 1 and the base 3, enabling the entire bottom-pulling assembly to rotate horizontally. Because its outer and inner rings can rotate freely relative to each other, the bottom-pulling assembly can rotate 360° continuously horizontally relative to the fixed connecting seat 1 (i.e., relative to the transfer machine) along with the base 3. The first, second, and third connecting assemblies each include multiple threaded fasteners (such as bolts and their matching nuts or screws). The threaded fasteners are evenly distributed circumferentially along the connecting surface (such as the contact surface of the connecting flange) to ensure uniform force distribution and a secure and reliable connection. This threaded connection method ensures both connection reliability and facilitates the disassembly, assembly, and transportation of the device underground. The first connecting component preferably uses eight φ30mm bolts and nuts; the second connecting component preferably uses twelve φ16mm screws; and the third connecting component preferably uses twelve φ16mm bolts and nuts.

[0042] like Figure 2 As shown, the bottom-pulling assembly is the main executing component for digging, crushing and clearing operations during bottom-pulling work. It adopts a multi-stage articulated structure and mainly includes the boom 4, the forearm 5 and the bucket 6.

[0043] Specifically, the boom 4, serving as the foundation of the entire working arm, is hinged at its base to the top of the base 3 via a pin assembly. A first hydraulic drive mechanism 7 is provided between the boom 4 and the base 3 to drive the boom 4 to pitch relative to the base 3. This first hydraulic drive mechanism 7 preferably employs a double-acting hydraulic cylinder, with the cylinder body hinged to the base 3 and the piston rod hinged to the middle or base of the boom 4. By controlling the extension and retraction of the piston rod of the first hydraulic drive mechanism 7, the boom 4 can be driven to pitch around its hinge point with the base 3, thereby adjusting the overall height of the bucket 6. The base of the forearm 5 is hinged to the end of the boom 4 via another pin assembly. A second hydraulic drive mechanism 8 is provided between the forearm 5 and the boom 4 to drive the forearm 5 to pitch relative to the boom 4. This second hydraulic drive mechanism 8 is also preferably a double-acting hydraulic cylinder, with the cylinder body hinged to the boom 4 and the piston rod hinged to the middle or base of the forearm 5. By controlling the extension and retraction of its piston rod, the boom 5 can be driven to pitch and swing around its hinge point with the boom 4, thereby achieving the horizontal extension and retraction of the bucket 6 and further adjustment of the digging angle. Furthermore, the bucket 6, as the working tool in direct contact with the bedrock, is hinged to the end of the boom 5 via a separate pin assembly. A third hydraulic drive mechanism 9 is provided between the bucket 6 and the boom 5 to drive the bucket 6 to perform a tilting digging action relative to the boom 5. This third hydraulic drive mechanism 9 preferably also uses a double-acting hydraulic cylinder, with the cylinder body hinged to the boom 5 and the piston rod hinged to the connecting lug on the back of the bucket 6. By controlling the extension and retraction of its piston rod, the bucket 6 can be driven to tilt around its hinge point with the boom 5, thereby completing actions such as scooping, lifting, and unloading.

[0044] To ensure the long-term, reliable operation of the entire bottom-pulling device in harsh downhole environments, high-strength pin assemblies are used to connect multiple hinge points between the base 3 and the boom 4, between the boom 5 and the bucket 6, and between the boom 4 and the boom 5. Furthermore, self-lubricating spherical bearings are installed at each hinge point (i.e., where the pin meets the bushing). These self-lubricating spherical bearings contain solid lubricant, providing excellent self-lubrication under heavy loads, impacts, and conditions where frequent maintenance is difficult. This not only ensures the flexibility of movement of each component in the bottom-pulling assembly but also significantly reduces the workload of frequent grease replenishment for equipment maintenance, effectively improving the reliability and service life of the entire device.

[0045] It should be noted here that regarding the power source for the bottom-pulling assembly, in this embodiment, the hydraulic control circuits of the first hydraulic drive mechanism 7, the second hydraulic drive mechanism 8, and the third hydraulic drive mechanism 9 are all connected to the hydraulic system of the transfer machine itself via hydraulic pipelines. Since coal mine transfer machines are typically equipped with high-power hydraulic pump stations, they are fully capable of simultaneously meeting the high-intensity operational requirements of this bottom-pulling device. Therefore, the hydraulic pump station of the transfer machine can provide power to this bottom-pulling device. This eliminates the need for a separate hydraulic station for the bottom-pulling device, simplifying the system structure, reducing manufacturing costs, and ensuring the reliability and sufficiency of the power source.

[0046] Furthermore, such as Figure 5 As shown, the bucket 6, being the working tool that directly contacts the bottom rock layer, is prone to damage. Therefore, for the bucket 6, detachable bucket teeth 61 are provided at the edge of its opening (i.e., its main stress-bearing excavation part). These detachable bucket teeth 61 are detachably connected to the bucket 6 via pins or bolts. When the bucket teeth 61 wear out severely due to prolonged friction and impact with hard rock, it is not necessary to replace the entire bucket 6; only new bucket teeth 61 need to be quickly replaced on-site, which can greatly reduce the later use and maintenance costs.

[0047] Meanwhile, to adapt to the harsh, humid, and corrosive environment underground and to extend the overall service life of the device, the connecting seat 1, base 3, and bottom-pulling components (including boom 4, forearm 5, and bucket 6) in this embodiment are all made of high-strength mining structural steel, such as Q460 or higher strength steel, to ensure they can withstand enormous digging reaction forces and impact loads. Furthermore, all structural components are coated with an anti-corrosion coating, such as epoxy zinc-rich primer plus polyurethane topcoat, which effectively resists the erosion of underground moisture and chemicals, prevents structural components from rusting and corroding, and ensures the long-term structural strength and operational reliability of the entire device.

[0048] This embodiment illustrates a bottom-pulling device for a transfer machine, which can be easily installed on existing transfer equipment, enabling the original transfer machine to perform bottom-pulling operations without the need for manual bottom-pulling. Furthermore, it eliminates the need for a separate power source and walking mechanism for this bottom-pulling device, fully utilizing the existing transfer machine's high-pressure hydraulic system and tracked walking capability. This expands the equipment's functionality and allows for multiple uses, significantly reducing equipment investment costs. A slewing bearing 2 is installed between the bottom-pulling component and the transfer machine, giving the entire bottom-pulling device flexible operation capabilities. In actual tunnel operations, operators do not need to frequently move the large transfer machine; simply driving the bottom-pulling component to rotate horizontally covers a wide area on both sides of the tunnel floor and in front of the transfer machine, greatly expanding the working range after a single equipment positioning and significantly improving the coverage efficiency and overall progress of the bottom-pulling operation. This is further enhanced by the coordinated movements of the boom 4, forearm 5, and bucket 6 within the bottom-pulling component. The entire bottom-pulling equipment forms a working mechanism similar to a hydraulic excavator, which can flexibly and precisely reach any position on the tunnel floor that needs bottom-pulling, and use powerful hydraulic breaking force to replace manual pneumatic picks for breaking and excavation. This not only greatly reduces the labor intensity of workers and avoids problems such as tool collisions, rock fragments causing injuries, and dust hazards, but also effectively improves the efficiency of bottom-pulling operations.

[0049] Example 2:

[0050] The bottom-pulling device for a transfer machine proposed in this embodiment differs from that in Embodiment 1 in that it also includes a hydraulic control system. All other parts not mentioned are the same as those in Embodiment 1, so they will not be described in detail here.

[0051] Specifically, the hydraulic control system includes a multi-way directional valve assembly, a flow distribution valve, and a pilot control valve. The multi-way directional valve assembly, as the core of the entire hydraulic control system, integrates multiple independent directional valve cores. Each of its working ports is connected to the rodless and rod-side ports of the first hydraulic drive mechanism 7, the second hydraulic drive mechanism 8, and the third hydraulic drive mechanism 9, respectively. By operating the multi-way directional valve assembly, the extension, retraction, or cessation of each hydraulic drive mechanism can be controlled individually, thereby achieving independent or combined movements of the boom 4, arm 5, and bucket 6.

[0052] The flow distribution valve is located between the hydraulic system of the transfer conveyor and the multi-way directional valve assembly, preferably on the main oil line between the main hydraulic system of the transfer conveyor and the aforementioned multi-way directional valve assembly. It is used to distribute the flow of hydraulic oil between the traveling mechanism and the bottom-pulling assembly of the transfer conveyor. For example, when the transfer conveyor needs to move a long distance, the flow distribution valve can supply most or even all of the hydraulic oil to the traveling mechanism; while when the transfer conveyor is in position and needs to perform bottom-pulling operations, the flow distribution valve can prioritize or supply all of the hydraulic oil to the bottom-pulling device, ensuring it has sufficient power for digging operations. By dynamically distributing the hydraulic oil between the two systems through the flow distribution valve, the two systems can work collaboratively and efficiently without interfering with each other.

[0053] The pilot control valve is connected to the multi-way directional valve assembly and is used to receive operating commands and control the movement of the valve cores in the assembly. This pilot control valve employs pilot hydraulic control technology; the operator only needs to operate the pilot handle with minimal force, and the pilot control valve will output the corresponding pilot pressure oil to actuate the high-flow-rate main valve core within the multi-way directional valve assembly. This pilot control method makes the operation of large and heavy-duty mechanisms extremely convenient and precise, greatly reducing the operator's workload and improving operating comfort and accuracy.

[0054] As a feasible embodiment, to further improve the safety and convenience of the bottom-pulling operation, the bottom-pulling device is equipped with one or more handheld remote controls. These handheld remote controls can be carried by the operator and are equipped with operating joysticks or buttons corresponding to various actions. A wireless transmitting component (e.g., a 2.4GHz wireless transmitting module) is installed inside the handheld remote control to convert the commands from the joystick / button into wireless signals and transmit them. Correspondingly, a wireless receiving component is fixed on the base 3, which is electrically connected to the pilot control valve. When the wireless receiving component receives a wireless command signal from the wireless transmitting component, it converts it into an electrical signal, thereby controlling the operation of the solenoid valve inside the pilot control valve. Thus, by operating the handheld remote control and sending operating commands from the wireless transmitting component to the wireless receiving component, the bottom-pulling component can be remotely controlled. Through remote control, the operator can move away from the dangerous area of ​​the bottom-pulling operation and perform remote control operations from a safe area with good rear visibility. This further improves the safety of the roadway bottom-pulling operation and ensures the personal safety of the operator.

[0055] As another feasible embodiment, considering the serious harm of dust in the underground operation environment to the health of workers, an automatic dust suppression component is integrated on the undercutting device. The automatic dust suppression component includes a high-pressure spray nozzle, a water supply pipeline and an electromagnetic control valve. The high-pressure spray nozzle is arranged above the bucket 6 and fixed on the boom 4 or the forearm 5. During installation, the spraying direction of the high-pressure spray nozzle should face the excavation area of the bucket 6 to ensure that the water mist can cover the main dust generation points. One end of the water supply pipeline is connected to the high-pressure spray nozzle, and the other end is connected to a supporting water supply system (such as a static pressure water pipe) on the transfer machine. The electromagnetic control valve, as a switch for opening and closing the water circuit, is arranged on the water supply pipeline and electrically connected to the hydraulic control system. When the first hydraulic driving mechanism 7, the second hydraulic driving mechanism 8 and the third hydraulic driving mechanism 9 act, the hydraulic control system can selectively control the electromagnetic control valve to open to spray and suppress dust in the excavation area. It can be understood that when one or more of the first hydraulic driving mechanism 7, the second hydraulic driving mechanism 8 and the third hydraulic driving mechanism 9 act, it means that the undercutting device is performing dust-generating operations such as excavation and crushing. At this time, the hydraulic control system will detect these action signals and automatically send an opening instruction to the electromagnetic control valve according to a preset program (optionally, for example, only open when the bucket 6 is excavating, or open when all actions occur). The electromagnetic control valve will then open, and high-pressure water will spray out from the nozzle to form a dense water mist curtain, effectively suppressing the coal dust and rock dust generated in the excavation area and causing them to settle. After the action stops, the hydraulic control system can also control the electromagnetic control valve to close after a delay for a period of time to ensure continuous dust suppression. The cooperation of the automatic dust suppression component and the undercutting component can greatly improve the air quality at the operation site and reduce dust pollution.

[0056] In the description of the present invention, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise specifically defined.

[0057] In the present invention, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0059] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0060] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A bottom-pulling device for a transfer machine, characterized in that, Includes a connecting seat (1), a slewing bearing (2), a base (3), and a pull-down assembly; The bottom-pulling assembly is hinged to the top of the base (3), and the bottom of the base (3) is rotatably connected to the top of the connecting seat (1) via the slewing bearing (2); The inner ring of the slewing bearing (2) is fixedly connected to the connecting seat (1), and the outer ring of the slewing bearing (2) is fixedly connected to the base (3), so that the bottom-pulling assembly can rotate 360° horizontally relative to the connecting seat (1) with the base (3). The bottom of the connecting seat (1) can be detachably connected to the transfer machine, and the power of the bottom pulling assembly is provided by the hydraulic pump station of the transfer machine.

2. The bottom-pulling device for a transfer machine as described in claim 1, characterized in that, The bottom-pulling assembly includes a boom (4), a forearm (5), and a bucket (6). The root of the boom (4) is hinged to the base (3), and a first hydraulic drive mechanism (7) is provided between the two for driving the boom (4) to pitch and swing relative to the base (3). The root of the forearm (5) is hinged to the end of the upper arm (4), and a second hydraulic drive mechanism (8) is provided between the two for driving the forearm (5) to pitch relative to the upper arm (4). The bucket (6) is hinged to the end of the boom (5), and a third hydraulic drive mechanism (9) is provided between the two for driving the bucket (6) to perform a flipping digging action relative to the boom (5).

3. The bottom-pulling device for a transfer machine as described in claim 2, characterized in that, The first hydraulic drive mechanism (7), the second hydraulic drive mechanism (8) and the third hydraulic drive mechanism (9) are all double-acting hydraulic cylinders. The hydraulic control oil circuits of the three are all connected to the hydraulic system of the transfer machine to provide power to the bottom-pulling assembly through the hydraulic pump station of the transfer machine.

4. A bottom-pulling device for a transfer machine as described in claim 2, characterized in that, It also includes a hydraulic control system, which includes a multi-way directional valve group, a flow distribution valve, and a pilot control valve. The multi-way directional valve group is connected to the oil ports of the first hydraulic drive mechanism (7), the second hydraulic drive mechanism (8) and the third hydraulic drive mechanism (9) respectively, and is used to individually control the extension, retraction or stop of each hydraulic drive mechanism. The flow distribution valve is located between the hydraulic system of the transfer machine and the multi-way directional valve group, and is used to distribute the flow of hydraulic oil between the traveling mechanism of the transfer machine and the bottom pulling assembly. The pilot control valve is connected to the multi-way directional valve group and is used to receive operation commands and control the valve core movement of the multi-way directional valve group.

5. A bottom-pulling device for a transfer machine as described in claim 4, characterized in that, It also includes handheld remote controls; The handheld remote control is equipped with an operating joystick or button, and has a wireless transmission component inside it; A wireless receiving component electrically connected to the pilot control valve is provided on the base (3). The handheld remote controller can send operation instructions to the wireless receiving component through the wireless transmitting component to remotely control the bottom-dragging component.

6. A bottom-dragging device for a transfer machine according to claim 4, wherein it further includes an automatic dust suppression component. The automatic dust suppression component includes a high-pressure spray nozzle, a water supply pipeline and an electromagnetic control valve. The high-pressure spray nozzle is provided on the boom (4) or the forearm (5) above the bucket (6), and the spraying direction of the high-pressure spray nozzle faces the excavation area of the bucket (6). One end of the water supply pipeline is connected to the high-pressure spray nozzle, and the other end is connected to the water supply system supporting the transfer machine. The electromagnetic control valve is arranged on the water supply pipeline and is electrically connected to the hydraulic control system. When the first hydraulic driving mechanism (7), the second hydraulic driving mechanism (8) and the third hydraulic driving mechanism (9) act, the hydraulic control system can selectively control the electromagnetic control valve to open to spray and suppress dust in the excavation area.

7. A bottom-dragging device for a transfer machine according to claim 2, wherein The base (3) and the boom (4), the forearm (5) and the bucket (6), and the boom (4) and the forearm (5) are respectively hinged by a pin shaft assembly, and self-lubricating spherical plain bearings are provided at each hinge point position.

8. A bottom-dragging device for a transfer machine according to claim 2, wherein Detachable bucket teeth (61) are provided at the edge of the bucket mouth of the bucket (6), and the detachable bucket teeth (61) are detachably connected to the bucket (6) by pins or bolts.

9. A bottom-dragging device for a transfer machine according to claim 1, wherein The transfer machine and the connecting seat (1), the connecting seat (1) and the slewing bearing (2), and the slewing bearing (2) and the base (3) are respectively connected by a first connecting component, a second connecting component and a third connecting component. The first connecting component, the second connecting component and the third connecting component each include a plurality of threaded fasteners evenly distributed in the circumferential direction.

10. A bottom-dragging device for a transfer machine according to claim 1, wherein The materials of the connecting seat (1), the base (3) and the bottom-dragging component are all mine-used high-strength structural steel, and anti-corrosion coatings are provided on their surfaces.

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