Tensioning device of pile driver

Abstract

The utility model relates to the technical field of pile drivers, in particular to a pile driver tensioning device which comprises a guide frame, a tensioning mechanism is fixedly connected to the side face of the guide frame, a lifting rope is wound between the guide frame and the tensioning mechanism in a penetrating mode, and one end, wound around the tensioning mechanism, of the lifting rope is fixedly connected with a pile hammer. The tensioning mechanism comprises a mounting plate fixedly connected to the side wall of the guide frame, and the left side and the right side of the lower end face of the mounting plate are rotationally connected with fixed guide wheels through connecting rods. When the pile hammer bounces upwards under the counter-acting force, the movable guide wheel moves downwards instantly under the action of the spring, so that the lifting rope continues to be kept in a tensioned state, the situation that the lifting rope is prone to deviating from the pulley on the guide frame due to rebound of the pile hammer is avoided, and the service life is prolonged; therefore, the position of the movable guide wheel in the vertical direction before being extruded can be adjusted, the tensioning degree of the tensioning mechanism can be adjusted according to conditions, adjustment is convenient, and use is flexible.

Description

TECHNICAL FIELD

[0001] The utility model relates to piling machine technical field, specifically disclose a piling machine tensioner. BACKGROUND

[0002] The operation mode of the drop hammer pile driver is the simplest, and the pile hammer thereof is a steel weight, which is lifted by a hoist with a hook during operation, and is freely dropped along a guide frame to perform pile driving after being unhooked;

[0003] In a large drop hammer pile driver, the lifting rope is connected to the pile hammer through a fixed position on the guide frame. In order to avoid the friction force accelerating the wear of the lifting rope, a fixed pulley is usually installed at the connecting point between the lifting rope and the guide frame to reduce the friction force between the lifting rope and the guide frame. However, due to the large reaction force acting on the pile hammer after it hits the pile, the pile hammer will rebound upward for a distance. Since the rebounding speed is too fast, the hoist cannot move in time, and the lifting rope is instantaneously loosened, which can cause the lifting rope to deviate or fall off the fixed pulley. Whether the lifting rope deviates or falls off the fixed pulley, it will increase the wear speed of the lifting rope and affect the service life of the lifting rope.

[0004] Chinese patent CN221798428U discloses a piling machine tensioner. The device adds a tensioning device, and the lifting rope is connected to the pile hammer after passing through each pulley on the guide frame and then passing through the tensioning mechanism. The tensioning mechanism uses a tensioning spring to maintain the tension on the lifting rope at any time, so that the lifting rope cannot easily deviate and slide on each pulley on the guide frame. This effectively solves the problem that the existing drop hammer pile driver does not have an effective tensioning device between the lifting rope and the guide frame, which causes the lifting rope to easily deviate from the pulley on the guide frame due to the rebound of the pile hammer, affecting the service life of the lifting rope.

[0005] The tensioning mechanism of the above-mentioned device uses a tensioning spring to maintain the tension on the lifting rope at any time. However, the spring is not convenient to replace after installation, and the sliding guide rail for guiding the spring is also a fixed structure. This causes the spring force to remain unchanged, so the tension of the tensioning mechanism cannot be adjusted according to the actual situation, and the lifting rope cannot always be in a stable tensioning state. INVENTION CONTENTS

[0006] The utility model discloses a piling machine tensioner, which can avoid the lifting rope from easily deviating from the pulley on the guide frame due to the rebound of the pile hammer, prolong the service life, and adjust the tension of the tensioning mechanism according to the situation, which is convenient and flexible to use.

[0007] The utility model discloses a piling machine tensioner, which can avoid the lifting rope from easily deviating from the pulley on the guide frame due to the rebound of the pile hammer, prolong the service life, and adjust the tension of the tensioning mechanism according to the situation, which is convenient and flexible to use.

[0008] A guide frame is fixedly connected with a tensioning mechanism on the side, a lifting rope is wound between the guide frame and the tensioning mechanism, and a pile hammer is fixedly connected to one end of the tensioning mechanism;

[0009] The tensioning mechanism comprises a mounting plate fixedly connected to the side wall of the guide frame, a fixed guide wheel is rotatably connected to the left and right sides of the lower end face of the mounting plate through a connecting rod, a guide cylinder is installed below the mounting plate, a piston is slidably connected in the guide cylinder, a fixed rod extending to the outside of the guide cylinder is fixedly connected to the lower end face of the piston, and a movable guide wheel is rotatably connected to the other end of the fixed rod.

[0010] The tensioning degree adjusting mechanism comprises a toothed plate fixedly connected to the top of the guide cylinder, two end plates are fixedly connected to the upper end face of the mounting plate, a rotating shaft is rotatably connected between the two end plates, and a gear meshingly connected with the toothed plate is fixedly connected to the outer wall of the rotating shaft.

[0011] The guide mechanism is used for guiding the sliding of the guide cylinder.

[0012] As a preferred piling machine tensioning device of the utility model, the guide mechanism comprises a notch opened in the outer wall of the mounting plate, the inner wall of the notch is fixedly connected with a sliding groove on the front and rear sides, and the outer wall of the guide cylinder is fixedly connected with a sliding rail in sliding connection with the sliding groove on the front and rear sides.

[0013] As a preferred piling machine tensioning device of the utility model, a spring is fixedly connected between the inner top end of the piston and the guide cylinder.

[0014] As a preferred piling machine tensioning device of the utility model, one end of the rotating shaft extends to the outside of the two end plates and is fixedly connected with a crank handle.

[0015] As a preferred piling machine tensioning device of the utility model, a limiting piece is fixedly connected to the outer wall of the fixed rod on the outside of the movable guide wheel, and the limiting piece has a U-shaped structure in cross section.

[0016] As a preferred piling machine tensioning device of the utility model, a reinforcing rod is fixedly connected between the toothed plate and the guide cylinder.

[0017] The utility model has the advantages of:

[0018] The gravity of the pile hammer has a certain traction effect on the hoisting rope, so that the hoisting rope is kept in a tension state, and under the pulling force of the pile hammer, the piston extrudes the spring, at this time the spring is in a contracted state, and the movable guide wheel is extruded to move upward, when the pile hammer is bounced upward by the reaction force, the movable guide wheel will be moved downward instantaneously due to the action of the spring, so that the hoisting rope continues to keep the tension state, avoiding the hoisting rope from deviating from the guide frame pulley due to the rebound of the pile hammer, and prolonging the service life;

[0019] When the tension needs to be adjusted, the rotating shaft is driven to rotate by the rocking handle, the rotating shaft drives the gear on the outer wall thereof to rotate, the gear further drives the toothed plate meshing therewith to move downward, and the toothed plate drives the entire guide cylinder and the movable guide wheel below to move downward, so that the position of the movable guide wheel in the vertical direction before being extruded can be adjusted, so that the tension of the tensioning mechanism can be adjusted according to the situation, and the adjustment is convenient and flexible. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the specific embodiment of the present application or the technical scheme in the prior art, the drawings needed to be used in the specific embodiment or the prior art description will be briefly introduced below. In all the drawings, similar elements or parts are generally indicated by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0021] Figure 1 It is a whole front view structure diagram of the present application.

[0022] Figure 2 It is an enlarged structure diagram of the tensioning mechanism of the present application.

[0023] Figure 3 It is a sectional view structure diagram of the guide cylinder of the present application.

[0024] Figure 4 It is a partial three-dimensional structure diagram of the present application.

[0025] Figure 5 It is a partial three-dimensional structure diagram of the present application.

[0026] In the drawings, 1 is a guide frame, 2 is a hoisting rope, 3 is a pile hammer, 4 is a tensioning mechanism, 5 is a mounting plate, 6 is a connecting rod, 7 is a fixed guide wheel, 8 is a guide cylinder, 9 is a piston, 10 is a fixed rod, 11 is a movable guide wheel, 12 is a spring, 13 is a toothed plate, 14 is an end plate, 15 is a rotating shaft, 16 is a gear, 17 is a limiting piece, 18 is a notch, 19 is a sliding groove, 20 is a sliding rail, 21 is a rocking handle, and 22 is a reinforcing rod. DETAILED DESCRIPTION

[0027] The utility model will be further described below in combination with the drawings and specific embodiments to help understand the contents of the utility model. The method used in the utility model is conventional method if no special provision; the raw materials and devices used are conventional commercial products if no special provision.

[0028] Please refer to Figures 1-5 A piling machine tensioning device, comprising:

[0029] The guide frame 1 is fixedly connected with the tensioning mechanism 4 on the side, the guide frame 1 and the tensioning mechanism 4 are wound with the lifting rope 2, and the lifting rope 2 is fixedly connected with the pile hammer 3 at one end of the tensioning mechanism 4;

[0030] The tensioning mechanism 4 comprises the mounting plate 5 fixedly connected to the side wall of the guide frame 1, the left and right sides of the lower end face of the mounting plate 5 are rotatably connected with the fixed guide wheels 7 through the connecting rods 6, the guide cylinder 8 is installed below the mounting plate 5, the piston 9 is slidably connected in the guide cylinder 8, the lower end face of the piston 9 is fixedly connected with the fixed rod 10 extending to the outside of the guide cylinder 8, and the other end of the fixed rod 10 is rotatably connected with the movable guide wheel 11;

[0031] The tensioning degree adjusting mechanism comprises the toothed plate 13 fixedly connected to the top of the guide cylinder 8, the upper end face of the mounting plate 5 is fixedly connected with the two front and rear distributed end plates 14, the two end plates 14 are rotatably connected with the rotating shaft 15, and the outer wall of the rotating shaft 15 is fixedly connected with the gear 16 meshingly connected with the toothed plate 13;

[0032] The guide mechanism is used for guiding the sliding of the guide cylinder 8.

[0033] In the embodiment: when the drop hammer type piling machine is used, one end of the lifting rope 2 is wound on the winch, the other end of the lifting rope 2 passes through the pulley on the guide frame 1 in sequence to the tensioning mechanism 4, and finally is fixedly connected with the pile hammer 3; when the lifting rope 2 passes through the tensioning mechanism 4, it passes through the right side fixed guide wheel 7, the movable guide wheel 11 and the left side fixed guide wheel 7 in sequence; the gravity of the pile hammer 3 has a certain traction effect on the lifting rope 2, so that the lifting rope 2 remains in a tensioned state, and under the tension of the pile hammer 3, the piston 9 extrudes the spring 12, at this time, the spring 12 is in a contracted state, and the movable guide wheel 11 is extruded to move upward, when the pile hammer 3 is upwardly bounced by the reaction force, the movable guide wheel 11 will be instantaneously downwardly moved due to the action of the spring 12, so that the lifting rope 2 continues to remain in a tensioned state, avoiding that the lifting rope is easily deviated from the pulley of the guide frame due to the rebound of the pile hammer 3, and prolonging the service life;

[0034] When the tension needs to be adjusted, the rotating shaft 15 is rotated by the rocking handle 21, the rotating shaft 15 drives the gear 16 on the outer wall of the rotating shaft 15 to rotate, the gear 16 further drives the toothed plate 13 meshed with the gear 16 to move downwards, the toothed plate 13 drives the whole guide cylinder 8 and the movable guide wheel 11 below to move downwards, thus the position of the movable guide wheel 11 in the vertical direction before being extruded can be adjusted, and the tension of the tensioning mechanism 4 can be adjusted according to the situation, which is convenient to adjust and flexible to use.

[0035] The rotating shaft 15 is provided with a ratchet and pawl structure on the outer wall, and is used for self-locking the rotating shaft 15.

[0036] As a technical optimization scheme of the utility model, the guide mechanism comprises a slot 18 formed on the outer wall of the mounting plate 5, the inner wall of the slot 18 is fixedly connected with sliding grooves 19 on the front and back sides, and the outer wall of the guide cylinder 8 is fixedly connected with sliding rails 20 which are slidingly connected with the sliding grooves 19.

[0037] In the embodiment, the sliding rails 20 slide in the sliding grooves 19, and play a guiding and limiting role on the guide cylinder 8, so that the guide cylinder 8 moves up and down more stably.

[0038] As a technical optimization scheme of the utility model, the piston 9 and the inner top end of the guide cylinder 8 are fixedly connected with a spring 12.

[0039] In the embodiment, the piston 9 and the inner top end of the guide cylinder 8 are fixedly connected with the spring 12, and the spring 12 is used to keep the hanging rope 2 in tension by the elastic force of the spring 12.

[0040] As a technical optimization scheme of the utility model, one end of the rotating shaft 15 extends to the outside of the two end plates 14 and is fixedly connected with the rocking handle 21.

[0041] In the embodiment, one end of the rotating shaft 15 extends to the outside of the two end plates 14 and is fixedly connected with the rocking handle 21, and the rocking handle 21 is used to drive the rotating shaft 15 to rotate.

[0042] As a technical optimization scheme of the utility model, the outer wall of the fixed rod 10 is fixedly connected with a limiting piece 17 located outside the movable guide wheel 11, and the limiting piece 17 has a U-shaped structure in cross section.

[0043] In the embodiment, the outer wall of the fixed rod 10 is fixedly connected with the limiting piece 17 located outside the movable guide wheel 11, and the limiting piece 17 is used to limit the hanging rope outside the movable guide wheel 11, so as to prevent the hanging rope from being separated from the movable guide wheel 11.

[0044] As a technical optimization scheme of the utility model, the toothed plate 13 and the guide cylinder 8 are fixedly connected with a reinforcing rod 22.

[0045] In this embodiment, a reinforcing rod 22 is fixedly connected between the toothed plate 13 and the guide cylinder 8 to improve the connection strength between the toothed plate 13 and the guide cylinder 8.

[0046] The working principle and usage process of this utility model: When the drop hammer pile driver is in use, one end of the hoisting rope 2 is wound around the winch, and the other end of the hoisting rope 2 passes through the pulleys on the guide frame 1 in sequence to the tensioning mechanism 4, and is finally fixedly connected to the pile hammer 3. When the hoisting rope 2 passes around the tensioning mechanism 4, it passes through the right fixed guide wheel 7, the moving guide wheel 11 and the left fixed guide wheel 7 in sequence. The weight of the pile hammer 3 has a certain traction effect on the hoisting rope 2, keeping the hoisting rope 2 in a taut state. Under the pull of the pile hammer 3, the piston 9 squeezes the spring 12. At this time, the spring 12 is in a contracted state, and the moving guide wheel 11 is squeezed and moves upward. When the pile hammer 3 is subjected to the reaction force and bounces upward, the moving guide wheel 11 will move downward instantaneously due to the action of the spring 12, so that the hoisting rope 2 continues to maintain a taut state, avoiding the hoisting rope from easily deviating from the pulleys on the guide frame due to the rebound of the pile hammer 3, and extending its service life.

[0047] When the tension needs to be adjusted, simply turn the crank 21 to rotate the shaft 15. The shaft 15 then rotates the gear 16 on its outer wall. The gear 16 further drives the toothed plate 13 that meshes with it to move downward. The toothed plate 13 drives the entire guide cylinder 8 and the moving guide wheel 11 below to move downward. Therefore, the vertical position of the moving guide wheel 11 before it is compressed can be adjusted, thereby realizing the adjustment of the tension of the tensioning mechanism 4 according to the situation. The adjustment is convenient and the use is flexible.

[0048] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0049] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A pile driver tensioning device, characterized by: Include: The guide frame (1) is fixedly connected with the tensioning mechanism (4) on the side, the guide frame (1) and the tensioning mechanism (4) are wound with the lifting rope (2), one end of the lifting rope (2) is fixedly connected with the pile hammer (3) by passing through the tensioning mechanism (4); The tensioning mechanism (4) includes a mounting plate (5) fixedly connected to the side wall of the guide frame (1), the lower end surface of the mounting plate (5) is rotatably connected with the fixed guide wheel (7) on the left and right sides through the connecting rod (6), the lower side of the mounting plate (5) is provided with a guide cylinder (8), the inside of the guide cylinder (8) is slidably connected with a piston (9), the lower end surface of the piston (9) is fixedly connected with a fixed rod (10) extending to the outside of the guide cylinder (8), the other end of the fixed rod (10) is rotatably connected with a movable guide wheel (11); The tensioning degree adjusting mechanism includes a toothed plate (13) fixedly connected to the top of the guide cylinder (8), the upper end surface of the mounting plate (5) is fixedly connected with two front and rear distributed end plates (14), the two end plates (14) are rotatably connected with a rotating shaft (15), the outer wall of the rotating shaft (15) is fixedly connected with a gear (16) engaged with the toothed plate (13); The guide mechanism is used for guiding the sliding of the guide cylinder (8).

2. A tensioning device for a pile driver as claimed in claim 1, characterised in that: The guide mechanism includes a notch (18) opened in the outer wall of the mounting plate (5), the inner wall of the notch (18) is fixedly connected with a sliding groove (19) on the front and rear sides, the outer wall of the guide cylinder (8) is fixedly connected with a sliding rail (20) slidably connected with the sliding groove (19) on the front and rear sides.

3. A tensioning device for a pile driver as defined in claim 1, characterized in that: The inside top end of the piston (9) and the guide cylinder (8) is fixedly connected with a spring (12).

4. A tensioning device for a pile driver as defined in claim 1, characterized in that: One end of the rotating shaft (15) extends to the outside of the two end plates (14) and is fixedly connected with a crank handle (21).

5. A pile driving tensioner as defined in claim 1, wherein: The outer wall of the fixed rod (10) is fixedly connected with a limiting piece (17) located outside the movable guide wheel (11), and the cross section of the limiting piece (17) is in U-shaped structure.

6. A pile driving tensioner as defined in claim 1, wherein: The toothed plate (13) and the guide cylinder (8) are fixedly connected with a reinforcing rod (22).

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