Winch for coal mine

Abstract

The invention relates to the field of mining equipment, in particular to a winch for a coal mine, which is characterized in that a winding drum is rotatably mounted on a base, a turntable which is coaxially arranged is fixedly mounted at one end of the winding drum, a mounting shell is fixedly mounted on the base positioned on the side of the turntable, and a cylindrical pin is slidably mounted on the mounting shell along the radial direction of the turntable; an arc-shaped groove allowing the arc-shaped end of the cylindrical pin to be clamped therein is formed in the peripheral face of the rotary disc, and a first spring used for pushing the cylindrical pin to be close to the rotary disc is arranged on the installation shell. A locking mechanism for preventing one end of the cylindrical pin from being separated from the arc-shaped groove is also arranged on the mounting shell; if the power motor breaks down, the electromagnet is powered off, and then when the circular-arc-shaped end of the cylindrical pin is clamped into the arc-shaped groove, continuous rotation of the rotary disc and the winding drum is limited through the cylindrical pin.

Description

Technical Field

[0001] The present invention relates to the field of mining equipment, and particularly to a winch for coal mines. Background Art

[0002] A winch refers to a light and small lifting device that winds a steel wire rope or chain around a drum to lift or tow heavy objects. It can vertically lift, horizontally or obliquely tow heavy objects and is widely used in coal mine transportation.

[0003] For existing winches, as disclosed in the utility model patent with the application number CN201621429453.7, a wire arrangement device for a coal mine roadway winch includes a winch base. Opposite circular baffles are vertically arranged above the winch base. A drum is arranged between the baffles, and a steel wire rope is wound around the drum. The drum is arranged on the rotor of a winch motor. A roller is horizontally arranged in a channel steel bracket. A slider is sleeved on a lead screw and a guide rod inside the channel steel bracket. A floating roller is arranged below the slider. The steel wire rope passes between the floating roller and the roller. The lead screw drives the slider to move back and forth along the guide rod, thereby driving the steel wire rope to tightly wind back and forth on the drum, realizing the orderly arrangement of the steel wire rope on the winch on the drum.

[0004] However, existing winches have low safety. During the use of the winch, when the winch motor accidentally fails, it may cause the steel wire rope to quickly fall off the drum, resulting in safety accidents. Summary of the Invention

[0005] The purpose of the present invention is to provide a winch for coal mines with higher safety to solve the defects mentioned in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution:

[0007] A winch for coal mines includes a base. A drum for winding a steel wire rope is rotatably installed on the base. One end of the drum is connected to a power device. A coaxial turntable is fixedly installed at one end of the drum. An installation housing is fixedly installed on the base beside the turntable. A cylindrical pin is slidably installed on the installation housing along the radial direction of the turntable. One end of the cylindrical pin is arc-shaped. An arc-shaped groove for the arc-shaped end of the cylindrical pin to be inserted into is provided on the outer peripheral surface of the turntable. A first spring for pushing the cylindrical pin close to the turntable is provided on the installation housing. A locking mechanism for preventing one end of the cylindrical pin from disengaging from the arc-shaped groove is also provided on the installation housing.

[0008] As a preferred technical solution, the locking mechanism includes a movable column installed on the mounting shell along the radial sliding direction of the cylindrical pin, and the mounting shell is provided with a second spring for pushing the movable column to move to the moving path of the cylindrical pin. When the movable column moves to the moving path of the cylindrical pin, the movable column blocks the cylindrical pin from moving away from the turntable and restricts the cylindrical pin from disengaging from the arc groove; the mounting shell is also provided with a driving component for driving the movable column to deviate from the moving path of the cylindrical pin.

[0009] As a preferred technical solution, the driving component includes a metal plate fixedly mounted on the movable column, and an electromagnet for adsorbing the metal plate is fixedly mounted on the mounting shell. When the electromagnet is energized, it adsorbs the metal plate and drives the movable column to move radially along the cylindrical pin and compress the second spring.

[0010] As a preferred technical solution, the mounting shell is provided with a guide hole extending radially along the turntable, and one end of the cylindrical pin is slidably installed in the guide hole; a limit plate is fixedly installed on the cylindrical pin extending outward from the guide hole, and a slide rod extending in the same direction as the cylindrical pin is fixedly installed on one side of the mounting shell, the limit plate is slidably installed on the slide rod, and a stop block is fixedly installed on one end of the slide rod away from the mounting shell; the first spring is sleeved on the slide rod located between the limit plate and the mounting shell.

[0011] As a preferred technical solution, a sliding cavity extending radially along the guide hole is provided in the mounting shell, one end of the sliding cavity is connected to the guide hole, the movable column is slidably installed in the sliding cavity, the metal plate is fixedly installed on the end of the sliding column away from the guide hole, and the second spring is arranged between the metal plate and the inner wall of the sliding cavity; a connecting cavity connecting one side of the sliding cavity is provided in the mounting shell, one end of the metal plate extends into the connecting cavity, one end of the electromagnet extends into the connecting cavity, and the electromagnet is located on the side of the metal plate away from the guide hole.

[0012] As a preferred technical solution, the drum extends laterally, and the base is provided with a mounting seat driven by a reciprocating mechanism and reciprocating along the length direction of the drum, and a guide wheel matching the wire rope is rotatably mounted on the mounting seat, and the axial direction of the guide wheel extends vertically, and four guide wheels are provided in a rectangular array in a horizontal plane, and the wire rope passes between two guide wheels opposite to each other on the left and right.

[0013] As a preferred technical solution, two hydraulic cylinders arranged opposite to each other are installed on the mounting seat, the piston rods of the two hydraulic cylinders are arranged facing each other, and a clamping block for clamping the wire rope between the front and rear groups of guide wheels is fixedly installed on the piston rods of the hydraulic cylinders.

[0014] As a preferred technical solution, an arc-shaped groove matching the outer wall of the wire rope is provided on the outer peripheral surface of the guide wheel.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) If the power motor fails, the electromagnet is powered off, and then when one end of the cylindrical pin is stuck in the arc groove, the second spring can push the movable column to move downward, so that the lower end of the movable column enters the guide hole, thereby blocking the cylindrical pin from moving away from the turntable through the movable column and limiting the cylindrical pin from leaving the arc groove, and then limiting the turntable and the reel from continuing to rotate through the cylindrical pin, thereby avoiding safety accidents;

[0017] (2) When the drum is winding up the wire rope, the reciprocating mechanism drives the mounting seat to move back and forth along the length direction of the drum, and the mounting seat drives the wire rope to move back and forth along the length direction of the drum through the guide wheel, so that the wire rope is neatly arranged on the drum, reducing the wear on the wire rope;

[0018] (3) When the power motor fails, the hydraulic cylinder can extend to drive the two clamps to move inward to clamp the wire rope, thereby preventing the wire rope from being released further, providing double protection and higher safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0021] Figure 2 yes Figure 1 A structural diagram from another perspective;

[0022] Figure 3 is a schematic structural diagram of a turntable according to an embodiment of the present invention;

[0023] Figure 4 is a schematic structural diagram of an installation housing according to an embodiment of the present invention;

[0024] Figure 5is a schematic structural diagram of a mounting base according to an embodiment of the present invention;

[0025] Figure 6 It is a schematic structural diagram of a clamping block according to an embodiment of the present invention.

[0026] In the figure: 1-base; 2-wire rope; 3-reel; 4-turntable; 5-mounting shell; 6-cylindrical pin; 7-arc groove; 8-first spring; 9-movable column; 10-second spring; 11-metal plate; 12-electromagnet; 13-guide hole; 14-limiting plate; 15-slide rod; 17-block; 18-slide cavity; 19-connecting cavity; 20-mounting seat; 21-guide wheel; 22-hydraulic cylinder; 23-clamping block; 24-annular groove; 25-bottom plate; 26-vertical plate; 27-power motor; 28-belt; 29-guide rod; 30-guide sleeve; 31-reciprocating screw rod; 32-drive motor; 33-nut; 34-wire groove. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figures 1 to 6 As shown, a winch for coal mines includes a base 1, which is provided with a bottom plate 25 and two vertical plates 26 fixedly mounted on the top of the bottom plate 25 and arranged opposite to each other on the left and right sides. A drum 3 for winding up a steel wire rope 2 is rotatably mounted between the two vertical plates 26 via a bearing. The drum 3 extends laterally, and the left end of the drum 3 is connected to a power device, which is specifically a power motor 27. The left end of the drum 3 is connected to the power motor 27 through a belt 28, and the power motor 27 drives the drum 3 to rotate to wind up or release the steel wire rope 2.

[0029] like Figure 3 As shown, a coaxially arranged turntable 4 is fixedly mounted on the right end of the reel 3, and the turntable 4 is located on the outside of the vertical plate 26. A mounting shell 5 is provided on both the front and rear sides of the turntable 4, and the mounting shell 5 is fixedly mounted on the vertical plate 26 on the right side by bolts.

[0030] like Figure 4As shown in the figure, a guiding hole 13 extending radially forward and backward along the turntable 4 is provided on the mounting housing 5. A cylindrical pin 6 is slidably mounted in the guiding hole 13. The ends of the two cylindrical pins 6 close to each other are arc-shaped. An arc-shaped groove 7 for the arc-shaped end of the cylindrical pin 6 to be inserted into is provided on the outer peripheral surface of the turntable 4, and a plurality of arc-shaped grooves 7 are evenly spaced around the circumference of the turntable 4; the ends of the two cylindrical pins 6 close to each other extend out of the guiding hole 13. A limiting plate 14 is also welded on the cylindrical pin 6 extending out of the guiding hole 13. Slide rods 15 extending in the same direction as the cylindrical pins 6 are respectively fixedly mounted on the sides of the two mounting housings 5 close to each other. The limiting plate 14 is slidably mounted on the corresponding slide rod 15. A stop block 17 is welded to the end of the slide rod 15 away from the corresponding mounting housing 5, thereby preventing the cylindrical pin 6 from falling off from the guiding hole 13; a first spring 8 is sleeved on the slide rod 15 between the corresponding limiting plate 14 and the mounting housing 5. The first spring 8 gives the cylindrical pin 6 a thrust towards the direction close to the turntable 4. During the rotation of the winding drum 3, when the turntable 4 drives the arc-shaped groove 7 to rotate to align with the cylindrical pin 6, the thrust of the first spring 8 can make the arc-shaped end of the cylindrical pin 6 be inserted into the arc-shaped groove 7; in addition, since the end of the cylindrical pin 6 inserted into the arc-shaped groove 7 is arc-shaped, when there is no external object blocking the movement of the cylindrical pin 6, the arc-shaped end of the cylindrical pin 6 being inserted into the arc-shaped groove 7 does not limit the rotation of the turntable 4 and the winding drum 3.

[0031] A locking mechanism for preventing one end of the cylindrical pin 6 from disengaging from the arc-shaped groove 7 is also provided on the mounting housing 5. Specifically, a sliding cavity 18 extending vertically in the radial direction of the guiding hole 13 is provided in the mounting housing 5 above the guiding hole 13. The lower end of the sliding cavity 18 communicates with the guiding hole 13. A movable column 9 is slidably mounted in the sliding cavity 18. The upper end of the movable column 9 is fixedly mounted with a metal plate 11 by screws. A second spring 10 for pushing the movable column 9 to move downward is connected between the top of the metal plate 11 and the top wall of the sliding cavity 18. When the lower end of the movable column 9 moves downward into the guiding hole 13, the lower end of the movable column 9 is located on the moving path of the cylindrical pin 6, thereby blocking the cylindrical pin 6 from moving away from the turntable 4 and restricting the cylindrical pin 6 from disengaging from the arc-shaped groove 7 through the movable column 9.

[0032] A driving component for driving the movable column 9 to deviate from the moving path of the cylindrical pin 6 is also provided on the mounting housing 5. Specifically, a communication cavity 19 communicating with one side of the sliding cavity 18 is provided in the mounting housing 5. One end of the metal plate 11 extends into the communication cavity 19. The driving component is specifically an electromagnet 12 fixedly mounted on the top of the mounting housing 5 by screws, and the lower end of the electromagnet 12 extends into the communication cavity 19.

[0033] During use, the electromagnet 12 is energized. The electromagnet 12 adsorbs the metal plate 11 to move upward and compresses the second spring 10. At the same time, the metal plate 11 drives the movable column 9 to move upward and completely retract into the sliding cavity 18. At this time, the movable column 9 will not block the cylindrical pin 6 from moving away from the turntable 4 and disengaging from the arc-shaped groove 7, and the power motor 27 can normally drive the reel 3 to rotate to wind or release the steel wire rope 2. By installing a sensor on the base 1 for detecting the rotation speed of the reel 3, if the power motor 27 fails and the sensor detects that the rotation speed of the reel 3 exceeds the normal operating speed of the power motor 27, the electromagnet 12 is de-energized. Then, when the arc-shaped end of the cylindrical pin 6 is caught in the arc-shaped groove 7, the second spring 10 can push the movable column 9 downward, so that the lower end of the movable column 9 enters the guiding hole 13, and the movable column 9 blocks the end of the cylindrical pin 6 away from the turntable 4. Thus, the movable column 9 blocks the cylindrical pin 6 from moving away from the turntable 4 and restricts the cylindrical pin 6 from disengaging from the arc-shaped groove 7. Furthermore, the rotation of the turntable 4 and the reel 3 is restricted by the cylindrical pin 6, avoiding safety accidents.

[0034] As Figure 1 , Figure 5 and Figure 6 shown, an installation seat 20 driven by a reciprocating mechanism and moving left and right in the length direction of the reel 3 is provided on the base 1. The installation seat 20 is located in front of the reel 3. A guiding rod 29 extending in the same direction as the reel 3 is fixedly installed between two vertical plates 26 by bolts. A guiding sleeve 30 matching the guiding rod 29 is fixedly installed at the bottom of the installation seat 20 by bolts. A reciprocating lead screw 31 extending in the same direction as the reel 3 is also rotatably installed between the two vertical plates 26. One end of the reciprocating lead screw 31 is connected to a driving motor 32 through a coupling. The driving motor 32 is installed on one of the vertical plates 26 by bolts. A nut 33 matching the reciprocating lead screw 31 is fixedly installed at the top of the installation seat 20 by bolts. By driving the reciprocating lead screw 31 to rotate by the driving motor 32, the reciprocating lead screw 31 acts on the nut 33 to drive the installation seat 20 to move left and right in the length direction of the reel 3 along the guiding rod 29.

[0035] A wire groove 34 penetrating through the front and back is provided in the installation seat 20. A guide wheel 21 matching the steel wire rope 2 is rotatably installed in the wire groove 34 through a bearing. The axial direction of the guide wheel 21 extends vertically. Four guide wheels 21 are arranged in a rectangular array in the horizontal plane. The steel wire rope 2 passes through between two left and right opposite guide wheels 21. During the process of the reel 3 winding the steel wire rope 2, the installation seat 20 is driven by the reciprocating mechanism to move reciprocally in the length direction of the reel 3. The installation seat 20 drives the steel wire rope 2 to move reciprocally in the length direction of the reel 3 through the guide wheel 21, so that the steel wire rope 2 is neatly arranged on the reel 3. In this embodiment, an annular groove 24 matching the outer wall of the steel wire rope 2 is provided on the outer peripheral surface of the guide wheel 21, which can prevent the steel wire rope 2 from falling off between the two left and right guide wheels 21.

[0036] Hydraulic cylinders 22 are respectively installed on the left and right sides of the mounting base 20 by bolts. The piston rods of the two hydraulic cylinders 22 are arranged towards each other. The piston rods of the hydraulic cylinders 22 extend into the wire groove 34. A clamping block 23 for clamping the steel wire rope 2 located between the front and rear groups of guide wheels 21 is fixedly installed on the piston rod of the hydraulic cylinder 22 by bolts. The inner side of the clamping block 23 is in an arc shape that fits the steel wire rope 2. When the power motor 27 fails, the two clamping blocks 23 can also be driven to move inwards by the extension of the hydraulic cylinders 22 to clamp the steel wire rope 2, thereby preventing the steel wire rope 2 from continuing to be released, providing double protection and higher safety.

[0037] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and do not limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A winch for coal mines, comprising a base (1), on which a drum (3) for winding up a steel wire rope (2) is rotatably mounted, one end of the drum (3) being connected to a power device, characterized in that: A coaxially arranged turntable (4) is fixedly mounted on one end of the reel (3); a mounting shell (5) is fixedly mounted on the base (1) located on the side of the turntable (4); a cylindrical pin (6) is mounted on the mounting shell (5) in a radially sliding manner along the turntable (4); one end of the cylindrical pin (6) is in an arc shape; an arc groove (7) is provided on the outer circumferential surface of the turntable for the arc-shaped end of the cylindrical pin (6) to be inserted; a first spring (8) is provided on the mounting shell (5) for pushing the cylindrical pin (6) close to the turntable (4); and a locking mechanism is also provided on the mounting shell (5) for preventing one end of the cylindrical pin (6) from escaping from the arc groove (7).

2. A winch for coal mine according to claim 1, characterized in that: The locking mechanism comprises a movable column (9) mounted on the mounting shell (5) in a radially sliding manner along the cylindrical pin (6); the mounting shell (5) is provided with a second spring (10) for pushing the movable column (9) to move to the moving path of the cylindrical pin (6); when the movable column (9) moves to the moving path of the cylindrical pin (6), the movable column (9) blocks the cylindrical pin (6) from moving in a direction away from the turntable (4) and restricts the cylindrical pin (6) from leaving the arc groove (7); the mounting shell (5) is also provided with a driving component for driving the movable column (9) to deviate from the moving path of the cylindrical pin (6).

3. A winch for coal mine according to claim 2, characterized in that: The driving component comprises a metal plate (11) fixedly mounted on the movable column (9); an electromagnet (12) for adsorbing the metal plate (11) is fixedly mounted on the mounting housing (5); when the electromagnet (12) is energized, it adsorbs the metal plate (11) and drives the movable column (9) to move radially along the cylindrical pin (6) and compress the second spring (10).

4. A winch for coal mine according to claim 3, characterized in that: The mounting shell (5) is provided with a guide hole (13) extending radially along the turntable (4), and one end of the cylindrical pin (6) is slidably installed in the guide hole (13); a limit plate (14) is fixedly installed on the cylindrical pin (6) extending out of the guide hole (13); a slide rod (15) extending in the same direction as the cylindrical pin (6) is fixedly installed on one side of the mounting shell (5); the limit plate (14) is slidably installed on the slide rod (15), and a stopper (17) is fixedly installed on one end of the slide rod (15) away from the mounting shell (5); the first spring (8) is sleeved on the slide rod (15) located between the limit plate (14) and the mounting shell (5).

5. A winch for coal mine according to claim 4, characterized in that: The installation shell (5) is provided with a sliding cavity (18) extending radially along the guide hole (13), one end of the sliding cavity (18) is connected to the guide hole (13), the movable column (9) is slidably installed in the sliding cavity (18), the metal plate (11) is fixedly installed on the end of the sliding column (9) away from the guide hole (13), and the second spring (10) is arranged between the metal plate (11) and the inner wall of the sliding cavity (18); the installation shell (5) is provided with a connecting cavity (19) connected to one side of the sliding cavity (18), one end of the metal plate (11) extends into the connecting cavity (19), one end of the electromagnet (12) extends into the connecting cavity (19), and the electromagnet (12) is located on the side of the metal plate (11) away from the guide hole (13).

6. A winch for coal mine according to claim 1, characterized in that: The reel (3) extends transversely, and the base (1) is provided with a mounting seat (20) driven by a reciprocating mechanism and reciprocating along the length direction of the reel (3). A guide wheel (21) matching the steel wire rope (2) is rotatably mounted on the mounting seat (20), and the axial direction of the guide wheel (21) extends vertically. Four guide wheels (21) are arranged in a rectangular array in a horizontal plane, and the steel wire rope (2) passes between two guide wheels (21) opposite to each other on the left and right.

7. A winch for coal mine according to claim 6, characterized in that: Two hydraulic cylinders (22) arranged opposite to each other are mounted on the mounting seat (20), the piston rods of the two hydraulic cylinders (22) are arranged facing each other, and a clamping block (23) for clamping the steel wire rope (2) between the front and rear two groups of guide wheels (21) is fixedly mounted on the piston rods of the hydraulic cylinders (22).

8. A winch for coal mine according to claim 6, characterized in that: An annular groove (24) is provided on the outer peripheral surface of the guide wheel (21) and matches the outer wall of the steel wire rope (2).

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