Tray mounting device for automatic coal mine anchor rod drilling frame

Abstract

The present application belongs to the technical field of coal mine underground anchor rod supporting equipment, and particularly relates to a tray mounting device for a coal mine automatic anchor rod drilling frame. The tray mounting device comprises a tray bin, which is mounted on a rack and used for storing trays; and a tray pickup device, which is used for picking up the trays in the tray bin and is mounted at the front end of a curved telescopic arm, which is mounted on a lifting mechanism. The present application realizes the function of automatically mounting trays in the automatic anchor rod drilling frame, reduces the volume of the automatic anchor rod drilling frame, and improves the practicability of the drilling frame.

Description

Technical Field

[0001] This invention belongs to the technical field of underground anchor bolt support equipment in coal mines, specifically relating to a tray installation device for an automatic anchor bolt drilling frame in coal mines. Background Technology

[0002] With the continuous development of mine intelligence and the promotion of technologies such as intelligent rapid tunneling, mine tunneling speed and intelligence levels have been significantly improved. Currently, the main factors restricting further increases in tunneling speed are low anchor bolt support efficiency, low intelligence level of anchor bolt support equipment, and a large number of personnel required. Automatic anchor bolt drilling rig technology, as a solution to this problem, offers a higher level of automation and reduces manpower compared to ordinary drilling rigs. However, the anchor bolts installed in the automatic anchor bolt drilling rig's bolt chamber are complete anchor bolt assemblies containing the anchor bolt body, nut, and tray. The tray is a stamped steel plate component with an area much larger than the anchor bolt cross-section but a thinner thickness, much smaller than the anchor bolt length. The method of placing the complete anchor bolt assembly in the anchor bolt chamber results in a large anchor bolt chamber volume for the automatic anchor bolt drill frame, sometimes exceeding three times the volume of the anchor drilling mechanism. This excessive size of the automatic anchor bolt drill frame severely restricts its adaptability in underground coal mines, making it inconvenient to use and hindering its widespread adoption. In some situations with limited space, the automatic anchor bolt drill frame cannot even be used due to its size.

[0003] To reduce the volume of the automatic anchor bolt drilling rig without significantly reducing the capacity of the anchor bolt chamber, the anchor bolt tray is placed separately in the tray chamber. During the anchor bolt installation process, the tray installation device on the automatic anchor bolt drilling rig removes the tray from the tray chamber and installs it on the anchor bolt. The drilling rig then completes the anchor bolt installation. Summary of the Invention

[0004] To solve the above problems, the present invention provides a tray installation device for an automatic anchor bolt drilling frame in coal mines.

[0005] The present invention adopts the following technical solution: a pallet installation device for an automatic anchor bolt drilling frame in a coal mine, comprising: a pallet bin, which is installed on a frame for storing pallets; and a pallet picking device, which is used to pick up pallets from the pallet bin, the pallet picking device being installed at the front end of a curved telescopic arm, the curved telescopic arm being installed on a lifting mechanism.

[0006] In some embodiments, the pallet storage includes a pallet storage shell with an opening at the top, a positioning guide post at the middle of the bottom of the pallet storage shell, a lifting seat on the positioning guide post, a pallet placed on the lifting seat, a guide support post at the bottom of the lifting seat, the upper end of the guide support post being fixed to the bottom of the lifting seat, the lower end of the guide support post passing through a through hole at the bottom of the pallet storage shell and extending out of the pallet storage shell, a spring on the guide support post, the upper end of the spring supporting the lower surface of the lifting seat, and the lower end supporting the inner surface of the bottom plate of the pallet storage shell, and one-way claws installed on both sides of the opening at the top of the pallet storage shell.

[0007] In some embodiments, the one-way chuck includes a fixed base, an internal spring and a movable block are disposed within the fixed base, and the protruding portion of the movable block has a trapezoidal longitudinal section. When subjected to downward pressure, the movable block compresses the internal spring and retracts into the fixed base.

[0008] In some embodiments, the lifting mechanism includes an outer sleeve, an inner sleeve, and a lifting cylinder. The bottom of the outer sleeve is fixed, the upper end of the inner sleeve is fixed to the bending telescopic arm, and the lifting cylinder is disposed between the outer sleeve and the inner sleeve.

[0009] In some embodiments, the bending telescopic boom includes a drive chain assembly, a drive motor, a drive gear, and a drive chain support sleeve. The output shaft of the drive motor meshes with the drive chain assembly through the drive gear, and the drive chain support sleeve is installed at the end of the drive chain assembly.

[0010] In some embodiments, the drive chain assembly includes a drive chain unit and a connecting chain unit disposed at the front end of the drive chain unit.

[0011] In some embodiments, the drive chain unit includes a swing chain link, a set of support rollers is mounted on the outside of the swing chain link, and three rows of racks are arranged in an alternating pattern according to the shape of the chain link on the inside of the swing chain link. Pin holes for connecting adjacent drive chain units are machined at both ends of the swing chain link. Cylindrical bosses are machined on both sides of the pin holes, and torsion spring fixing holes are machined. Torsion springs are installed between the pin holes of two adjacent swing chain links.

[0012] In some embodiments, one end of the swing link has a plane perpendicular to the center line of the link's length direction, and the other end has a concave plane that forms a 15-degree angle with the center line of the link's length direction. When each pair of adjacent swing links is in a free state, the center lines of the length direction will form a 15-degree angle.

[0013] In some embodiments, the drive chain support sleeve includes a drive chain sliding guide rail and a drive chain roller guide rail. The drive chain sliding guide rail and the drive chain roller guide rail are sleeve structures. The swing chain link and the support roller pass through the drive chain sliding guide rail and the drive chain roller guide rail. A lifting mechanism connecting seat and a drive motor mounting seat are fixed on the outside of the drive chain sliding guide rail and the drive chain roller guide rail.

[0014] In some embodiments, the pallet picking device includes a base, an unlocking plate, and an electromagnet. A connecting seat is machined on the upper surface of the base and is fixedly connected to the front end of the curved telescopic arm. Unlocking plates are fixedly installed on both sides of the base, and the positions of the unlocking plates correspond to the positions of the one-way claws of the pallet compartment. An electromagnet is installed on the lower surface of the base for picking up the anchor rod pallet after it is placed in the pallet compartment and unlocked.

[0015] Compared with existing technologies, this invention discloses a pallet installation device suitable for automatic anchor bolt drilling frames in coal mines. It has the function of storing a certain number of pallets and automatically removing the pallets from the pallet compartment and placing them in the installation position according to the working status of the automatic anchor bolt drilling frame, thus realizing the function of pallet installation. This invention is applied to automatic anchor bolt drilling frames, where anchor bolt pallets are stored separately in the pallet compartment. Then, a bending telescopic arm, a pallet picking device, etc., are used to remove the pallets from the anchor bolt compartment and automatically place them at the anchor bolt hole position, realizing the function of automatic pallet installation in the automatic anchor bolt drilling frame. This achieves the goal of reducing the size of the automatic anchor bolt drilling frame and improving its practicality. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the pallet mounting device (in non-working state). Figure 2 This is a diagram of the pallet storage structure. Figure 3 It is a one-way chuck; Figure 4 It is a lifting mechanism; Figure 5 A partial cross-section of the curved telescopic boom assembly. Figure 6 For drive chain components; Figure 7 For chain units; Figure 8 Drive chain support sleeve; Figure 9 For pallet picking device; Figure 10 This is a structural diagram of the pallet mounting device (pallet mounting location). In the diagram, 1-pallet compartment, 2-lifting mechanism, 3-bending telescopic arm, 4-pallet picking device, 5-mounting plate, 2.1-pallet compartment outer shell, 2.2-one-way gripper, 2.3-lifting seat, 2.4-spring, 2.5-guide support column, 2.6-positioning guide column, 2.2.1-fixed seat, 2.2.2-spring, 2.2.3-moving block, 3.1-outer sleeve, 3.2-inner sleeve, 3.3-lifting cylinder, 4.1-drive chain assembly, 4.2 4.3 Drive motor, 4.4 Drive gear, 5.5 Drive chain support sleeve, 5.1 Drive chain unit, 5.2 Connecting chain unit, 5.1.1 Swing chain link, 5.1.2 Support roller, 5.1.3 Torsion spring, 4.4.1 Lifting mechanism connecting seat, 4.4.2 Drive motor mounting seat, 4.4.3 Drive chain sliding guide rail, 4.4.4 Drive chain roller guide rail, 6.1 Base, 6.2 Unlocking plate, 6.3 Electromagnet. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] The automatic anchor bolt drilling rig for coal mines uses a pallet installation device, which consists of a pallet compartment, a lifting mechanism, a bending telescopic arm, a pallet picking device, and a mounting plate. All actions are controlled by an external electrical system.

[0019] The pallet compartment is a device for storing pallets. It is connected to the frame via a mounting plate. At the same time, the outer sleeve of the lifting mechanism is also installed on the mounting plate. The inner sleeve of the lifting mechanism is connected to the curved telescopic arm. The curved telescopic arm is installed above the pallet compartment, and a pallet picking device is installed at the front end of the telescopic arm.

[0020] The pallet compartment is a device for storing pallets. It is fixedly installed on the mounting plate and can store no less than 5 to 10 pallets. At the upper opening of the pallet compartment, there is a one-way claw with spring return to ensure that the pallet can be easily put into the pallet compartment. However, when taking it out, a special device is required to prevent the pallet from falling out of the pallet compartment during use.

[0021] The pallet compartment consists of 2.1 the outer shell, 2.2 one-way claws, 2.3 the lifting seat, 2.4 the spring, 2.5 the guide support column, and 2.6 the positioning guide column. The outer shell is a square cylindrical structure with a closed bottom, made of steel plate. A positioning guide column 2.6 is fixedly installed in the middle of the bottom plate. The axis of the positioning guide column is perpendicular to the bottom plate, and its cylindrical outer surface has a clearance fit with the pallet hole, ensuring that the pallet can move flexibly up and down along the positioning guide column after installation. Four sets of one-way claws are installed on both sides of the pallet compartment opening. Each one-way claw consists of a fixed seat 2.2.1, an internal spring 2.2.2, and a movable block 2.2.3. The protruding part of the movable block has a trapezoidal longitudinal section. When subjected to downward pressure, the movable block compresses the internal spring and retracts into the fixed seat, allowing the pallet to be removed from the pallet compartment. When the external force is removed, the movable block extends, stopping the pallet. The lifting seat is a square part made of stamped steel plate, with a concave hemispherical center to increase rigidity and the number of storage pallets. A round hole is machined in the center to fit the positioning guide posts. Holes are machined at the four corners of the square, and screws are used to connect the lifting seat to the top of the guide supports. The lower surface of the lifting seat rests on the upper end of a spring. Four guide support posts pass through the spring and through through holes in the bottom of the pallet compartment shell, with anti-loosening nuts installed at the tail. The upper end of the spring supports the lower surface of the lifting seat, and the lower end supports the inner surface of the bottom plate of the pallet compartment shell. After the pallet compartment is assembled, the lifting seat is located at the top of the pallet compartment, close to the lower surface of the one-way gripper, and can rise and fall freely under external force.

[0022] The lifting mechanism consists of three parts: an outer sleeve, an inner sleeve, and a lifting cylinder. The lower outer sleeve is fixedly mounted on the mounting plate, while the upper inner sleeve is fixedly mounted to the bending telescopic arm. The lifting cylinder is installed within both the inner and outer sleeves of the lifting mechanism to achieve the lifting action. The inner surface of the outer sleeve and the outer surface of the inner sleeve are machined to achieve high dimensional accuracy and surface roughness, ensuring low lateral tilting and high operational precision during lifting.

[0023] The bending telescopic boom consists of 4.1 drive chain assembly, 4.2 drive motor, 4.3 drive gear, and 4.4 drive chain support sleeve, etc.

[0024] The drive chain assembly consists of a set of 5.1 drive chain units and one 5.2 connecting chain unit. The drive chain unit comprises oscillating chain links 5.1.1, support rollers 5.1.2, and torsion springs 5.1.3. The oscillating chain links are made of steel, with pin holes machined at both ends. Cylindrical bosses are machined on both sides of the pin holes, along with torsion spring fixing holes. During assembly, two torsion springs are installed on both sides of the pin holes of the two oscillating chain links. One end of the oscillating chain link has a plane perpendicular to the centerline of the link's length direction, while the concave plane at the other end forms a 15-degree angle with the centerline of the link's length direction. After assembly, when each pair of adjacent oscillating chain links is in a free state, their centerlines will form a 15-degree angle. Three rows of racks are machined on the inner side of the oscillating chain links. These racks are staggered according to the shape of the chain links, ensuring high continuity of the racks after the chain is assembled, achieving smooth drive. On the outside of the chain link, there is a set of support rollers, consisting of 4 identical rollers and supports. After assembly, the distance between any two adjacent rollers is equal.

[0025] Due to the structure of the anchor drilling rig and the limited installation space, the positions of the pallet compartment, the anchor bolt centerline, and the chain track centerline are not aligned. Furthermore, given the limited space, it's impossible to design them in a straight line. After removing the pallet from the pallet compartment, it needs to travel an arc before being placed at the anchor bolt position, allowing the anchor bolt to pass through the center hole of the pallet. Therefore, after the drive chain is pushed out of the track by the drive wheel, it automatically bends and springs back under the action of the torsion spring, automatically forming a 15-degree angle with the adjacent chain link. When all the chain links are extended, the pallet, driven by the automatically bending chain, is precisely positioned at the pallet installation position—that is, at the anchor bolt centerline.

[0026] The drive chain support sleeve is made of steel plate with a closed cross-section. Functionally, it can be divided into several parts: the lifting mechanism connecting seat 4.4.1, the drive motor mounting seat 4.4.2, the drive chain sliding guide rail 4.4.3, and the drive chain roller guide rail 4.4.4. The drive chain roller guide rail 4.4.4 possesses sufficient strength and rigidity to ensure that the deformation of the guide rail is within a small range after the drive chain assembly is fully retracted. The drive chain sliding guide rail 4.4.3 is arranged perpendicularly to the drive chain roller guide rail 4.4.4. During operation, it contacts the upper and lower surfaces of the drive chain in a sliding friction state, and simultaneously bears the vertical loads of the drive chain during operation, requiring sufficient strength. The lifting mechanism connecting seat, the drive motor mounting seat, and the drive chain sliding guide rail are fixedly connected.

[0027] The drive chain assembly is driven by a drive gear and can extend or retract from the drive chain support sleeve. When retracted, the chain axis is parallel to the drive chain support sleeve axis; when extended, the extended portion automatically bends into an arc under the action of a spring. At the front end of the drive chain assembly, it is fixedly connected to the base of the pallet picking device via a connecting chain unit.

[0028] The pallet picking device has a U-shaped structure, consisting of three parts: a base, unlocking plates, and electromagnets. The base is made of steel, with a connecting seat machined onto its upper surface for fixed connection to the front end of the curved telescopic arm. Four unlocking plates are fixedly installed on both sides of the base, corresponding to the one-way claw positions of the pallet compartment. Four electromagnets are installed on the lower surface of the base, used to energize and pick up the anchor rod pallet after it has been placed in the pallet compartment and unlocked.

[0029] When working, follow these steps: (1) The lifting mechanism descends, driving the bending telescopic arm and pallet picking device to descend to the pallet picking position in the pallet compartment, and opening the one-way claw of the pallet compartment.

[0030] (2) The electrical control system supplies power to the electromagnet of the pallet picking device, and the pallet picking device picks up the pallet.

[0031] (3) The lifting mechanism rises, and after rising to a certain position, the one-way claw extends to ensure that the picking device picks up only one tray. At the same time, the remaining trays rise to the tray picking position.

[0032] (4) When the lifting mechanism rises to the height of the installation tray, the electrical control system supplies power to the drive motor in the bending telescopic arm, driving the drive chain assembly to extend.

[0033] (5) The drive chain assembly extends out and bends at the same time, moving the picked-up tray to a position directly opposite the anchor hole.

[0034] (6) The drill box in the drill frame rises and the anchor rod is inserted into the anchor rod hole of the tray.

[0035] (7) The electrical control system de-energizes the electromagnet of the tray picking device.

[0036] (8) The electrical control system supplies power to the drive motor in the bending telescopic arm, and the drive motor drives the drive chain assembly to retract to the initial non-working position.

[0037] (9) Repeat steps 1-8 to complete the installation of the next tray.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tray installation device for an automatic anchor bolt drilling frame in coal mines, characterized in that, include: Pallet compartment (1), which is installed on the rack for storing pallets; Pallet picking device (4), the pallet picking device (4) is used to pick up pallets in pallet compartment (1), the pallet picking device (4) is installed at the front end of the curved telescopic arm (3), the curved telescopic arm (3) is installed on the lifting mechanism (2); The pallet storage (1) includes a pallet storage shell (2.1) with an opening at the top. A positioning guide post (2.6) is provided at the middle of the bottom of the pallet storage shell (2.1). A lifting seat (2.3) is fitted on the positioning guide post (2.6). A pallet is placed on the lifting seat (2.3). A guide support post (2.5) is also supported at the bottom of the lifting seat (2.3). The upper end of the guide support post (2.5) is fixed to the bottom of the lifting seat (2.3). The lower end of the guide support post (2.5) passes through the through hole at the bottom of the pallet storage shell (2.1) and extends out of the pallet storage shell (2.1). A spring (2.4) is fitted on the guide support post (2.5). The upper end of the spring (2.4) is supported on the lower surface of the lifting seat, and the lower end is supported on the inner surface of the bottom plate of the pallet storage shell. One-way claws (2.2) are installed on both sides of the opening at the top of the pallet storage shell (2.1). The bending telescopic arm (3) includes a drive chain assembly (4.1), a drive motor (4.2), a drive gear (4.3), and a drive chain support sleeve (4.4). The output shaft of the drive motor (4.2) meshes with the drive chain assembly (4.1) through the drive gear (4.3), and the drive chain support sleeve (4.4) is installed at the front end of the drive chain assembly (4.1). The drive chain assembly (4.1) includes a drive chain unit (5.1) and a connecting chain unit (5.2) disposed at the front end of the drive chain unit (5.1). The drive chain unit (5.1) includes a swing chain link (5.1.1). A set of support rollers (5.1.2) are installed on the outside of the swing chain link (5.1.1). The inside of the swing chain link (5.1.1) has three rows of racks arranged in an alternating pattern according to the shape of the chain links. The two ends of the swing chain link (5.1.1) are machined with pin holes for connecting adjacent drive chain units (5.1). Cylindrical bosses are machined on both sides of the pin holes, and torsion spring fixing holes are machined. Torsion springs (5.1.3) are installed between the pin holes of two adjacent swing chain links (5.1.1).

2. The tray installation device for automatic anchor bolt drilling frame in coal mines according to claim 1, characterized in that, The one-way chuck (2.2) includes a fixed base (2.2.1), an internal spring (2.2.2) and a movable block (2.2.3) are provided inside the fixed base (2.2.1). The extended part of the movable block (2.2.3) has a trapezoidal longitudinal section. When subjected to downward pressure, the movable block compresses the internal spring and retracts into the fixed base.

3. The tray installation device for automatic anchor bolt drill frames in coal mines according to claim 1, characterized in that, The lifting mechanism (2) includes an outer sleeve (3.1), an inner sleeve (3.2) and a lifting cylinder (3.3). The bottom of the outer sleeve (3.1) is fixed, the upper end of the inner sleeve (3.2) is fixed to the bending telescopic arm (3), and the lifting cylinder (3.3) is provided between the outer sleeve (3.1) and the inner sleeve (3.2).

4. The tray installation device for automatic anchor bolt drilling frame in coal mines according to claim 1, characterized in that, One end of the oscillating link (5.1.1) has a plane perpendicular to the center line of the link's length direction, and the concave plane at the other end forms a 15-degree angle with the center line of the link's length direction. When each pair of adjacent oscillating links (5.1.1) are in a free state, their center lines of the length direction will form a 15-degree angle.

5. The tray installation device for automatic anchor bolt drill frames in coal mines according to claim 1, characterized in that, The drive chain support sleeve (4.4) includes a drive chain sliding guide rail (4.4.3) and a drive chain roller guide rail (4.4.4). The drive chain sliding guide rail (4.4.3) and the drive chain roller guide rail (4.4.4) are sleeve structures. The swing chain link (5.1.1) and the support roller (5.1.2) are inserted inside the drive chain sliding guide rail (4.4.3) and the drive chain roller guide rail (4.4.4). A lifting mechanism connecting seat (4.4.1) and a drive motor mounting seat (4.4.2) are fixed on the outside of the drive chain sliding guide rail (4.4.3) and the drive chain roller guide rail (4.4.4).

6. The tray installation device for automatic anchor bolt drilling frame in coal mines according to claim 2, characterized in that, The pallet picking device (4) includes a base (6.1), an unlocking plate (6.2), and an electromagnet (6.3). A connecting seat is machined on the upper surface of the base (6.1) and fixedly connected to the front end of the curved telescopic arm. Unlocking plates (6.2) are fixedly installed on both sides of the base (6.1), and the position of the unlocking plates (6.2) corresponds to the position of the one-way claw (2.2) of the pallet compartment. An electromagnet is installed on the lower surface of the base (6.1) for picking up the anchor rod pallet after it is placed in the pallet compartment and unlocked.

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