A reverse stop device for a line foundation hole digging pile cradle

Abstract

The present invention discloses a backstop device for a rocker arm for bored piles in line foundations, comprising a base connected to the rocker arm after the main shaft of the motor extends into it, a ratchet wheel fixedly mounted on the main shaft of the motor inside the base, a rotating shaft mounted on the base above the ratchet wheel, a pawl mounted on the rotating shaft, the pawl having a triangular protrusion protruding upwards, an elastic element mounted on the base above the triangular protrusion, which presses against one side of the triangular protrusion when the pawl rotates and lifts along the rotating shaft, and presses against the other side of the triangular protrusion when the pawl rotates and presses down along the rotating shaft, one end of the pawl having a lever extending out, a slot provided on the base for the lever to extend out and move upwards and downwards, one end of the pawl at the lever end having a first stop pawl that inserts into the tooth groove of the ratchet wheel when the pawl is pressed down, allowing the ratchet wheel to rotate counterclockwise and lock clockwise, the other end of the pawl having a second stop pawl that inserts into the tooth groove of the ratchet wheel when the pawl is lifted up, allowing the ratchet wheel to rotate clockwise and lock counterclockwise.

Description

Technical Field

[0001] This utility model relates to the field of equipment for construction of bored piles for railway foundations, and in particular to a backstop device for a rocker arm for bored piles for railway foundations. Background Technology

[0002] Bored pile foundations are a common type of pile foundation used in the construction of power transmission lines, communication towers, and other pole foundations. For construction sites inaccessible to large drilling machinery, manual excavation is primarily used to create holes, place reinforcing cages inside, and pour concrete to form the pile foundation. Manually excavated bored piles mainly rely on a motor spindle controlling the winch rotation of the excavation frame to raise and lower ropes for hoisting objects. However, relying solely on the motor spindle to control the winch rotation can lead to misoperation or other reasons causing the winch to rotate in the opposite direction, posing a serious safety hazard during construction. Utility Model Content

[0003] The purpose of this invention is to provide a reverse stop device for a cradle of bored piles for railway foundation with bidirectional switching locking, so as to improve safety during construction.

[0004] The reverse stop device for the cradle of bored piles for line foundations described in this utility model includes a base connected to the cradle after the motor spindle extends into it. A ratchet is fixedly installed on the motor spindle inside the base. A rotating shaft is installed on the base above the ratchet, and a pawl is installed on the rotating shaft. The pawl has a triangular protrusion protruding upward. An elastic element is installed on the base above the triangular protrusion, which presses against one side of the triangular protrusion when the pawl rotates and lifts along the rotating shaft, and presses against the other side of the triangular protrusion when the pawl rotates and presses down along the rotating shaft. A lever extends from one end of the pawl. A slot is provided on the base for the lever to extend and move upward and downward. One end of the pawl at the lever end extends downward and has a first stop pawl that inserts into the tooth groove of the ratchet when the pawl is pressed down, allowing the ratchet to rotate counterclockwise and lock clockwise. The other end of the pawl extends downward and has a second stop pawl that inserts into the tooth groove of the ratchet when the pawl is lifted, allowing the ratchet to rotate clockwise and lock counterclockwise.

[0005] The reverse stop device for the foundation bored pile cradle of this utility model involves pressing a pawl down in the longitudinal slot using a lever. The pawl at the first stop pawl rotates downwards on the shaft and inserts into the tooth groove of the ratchet, while the pawl at the second stop pawl lifts upwards. At this time, the first stop pawl clockwise engages with the ratchet teeth in the ratchet tooth groove, allowing the ratchet teeth to slide counterclockwise, enabling the motor shaft to rotate counterclockwise while locking clockwise rotation, thus allowing the cradle to rotate only in the reverse direction. Conversely, when the lever lifts the pawl in the slot, the pawl at the second stop pawl rotates downwards on the shaft and inserts into the ratchet tooth groove. The pawl at the first stop pawl lifts upwards, and the second stop pawl counterclockwise engages with the ratchet teeth in the ratchet tooth groove, allowing the ratchet teeth to slide clockwise, enabling the motor shaft to rotate clockwise while locking counterclockwise rotation, thus allowing the cradle to rotate only in the forward direction. This bidirectional locking mechanism for the foundation bored pile cradle improves safety during construction. In addition, the pawl has a triangular protrusion that protrudes upwards. When the pawl is pressed down, the elastic element presses against one side of the triangular protrusion to prevent the second stop pawl end from falling off. When the pawl is raised, the elastic element presses against the other side of the triangular protrusion to prevent the first stop pawl end from falling off, further improving safety during construction.

[0006] An elastic element is installed on the base above the triangular protrusion, which presses against one side of the triangular protrusion when the pawl rotates along the pivot and presses against the other side of the triangular protrusion when the pawl rotates along the pivot and presses down.

[0007] As a preferred embodiment of the present invention, the bottom of the first stop pawl is a first engagement angle portion that meshes with the ratchet. One side of the first engagement angle portion is a first vertical side portion that clockwise engages with the ratchet teeth in the ratchet tooth groove, and the other side is a first inclined side portion that allows the ratchet teeth to slide counterclockwise in the ratchet tooth groove.

[0008] As a preferred embodiment of the present invention, the connection between the first vertical side and the first inclined side is provided with a first slope portion that is inclined toward the first vertical side and engages with the inner wall of the tooth groove of the ratchet.

[0009] As a preferred embodiment of the present invention, the bottom of the second stop pawl is a second engagement angle portion that meshes with the ratchet. One side of the second engagement angle portion is a second vertical side portion that clamps the ratchet teeth counterclockwise in the ratchet tooth groove, and the other side is a second oblique side portion that allows the ratchet teeth to slide clockwise in the ratchet tooth groove.

[0010] As a preferred embodiment of the present invention, the connection between the second vertical side and the second inclined side is provided with a second inclined portion that is inclined toward the second vertical side and fits against the inner wall of the tooth groove of the ratchet.

[0011] As a preferred embodiment of this utility model, the elastic element includes a spring and an elastic column, with one end of the spring connected to the elastic column and the other end fixed inside the base.

[0012] As a preferred embodiment of this utility model, the end face of the bottom of the elastic column is provided with a ball head.

[0013] As a preferred embodiment of this utility model, a cover plate is installed on one side of the base to cover the ratchet.

[0014] As a preferred embodiment of this utility model, a bearing is provided between the cover plate and the ratchet to connect the motor spindle and the rocker arm. Attached Figure Description

[0015] Figure 1 This is an exploded schematic diagram of the anti-reverse device for the bored pile cradle of the present invention.

[0016] Figure 2 This is a schematic diagram of the anti-reverse device for the bored pile jack of the present invention.

[0017] Figure 3 This is a perspective view of the anti-reverse device for the cradle of bored piles for railway foundations according to this utility model;

[0018] Figure 4 This is another exploded schematic diagram of the anti-reverse device for the bored pile cradle of the present invention for railway foundation.

[0019] Figure 5 This is another perspective view of the anti-reverse device for the cradle of bored piles for railway foundations according to this utility model. Detailed Implementation

[0020] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] In this utility model, it should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0022] A backstop device for a cradle frame of bored piles for railway foundations, such as Figure 1 - Figure 5As shown, the device includes a base 1 that connects to the cradle after the motor spindle extends into it. A ratchet 2 is fixedly installed on the motor spindle inside the base. A rotating shaft 3 is installed on the base above the ratchet. A pawl 4 is installed on the rotating shaft. The pawl has a triangular protrusion 5 protruding upwards. An elastic element 6 is installed on the base above the triangular protrusion, which presses against one side of the triangular protrusion when the pawl rotates and lifts along the rotating shaft, and presses against the other side of the triangular protrusion when the pawl rotates and presses down along the rotating shaft. A lever 7 extends out from one end of the pawl. A slot 8 is provided on the base for the lever to extend and move upwards and downwards. A first stop pawl 9 extends downward from one end of the pawl at the lever end and inserts into the tooth groove of the ratchet when the pawl is pressed down, allowing the ratchet to rotate counterclockwise and lock clockwise. A second stop pawl 10 extends downward from the other end of the pawl and inserts into the tooth groove of the ratchet when the pawl is lifted up, allowing the ratchet to rotate clockwise and lock counterclockwise.

[0023] The base has through holes from one side to the other. Inside the base is a cavity for mounting a ratchet and a pawl. The motor spindle extends into the through hole on one side of the base, and the ratchet is fixed to the motor spindle inside the cavity of the base using a clamp or pin. The middle part of the pawl is mounted on the rotating shaft. Depressing the lever lowers the first stop pawl end and raises the second stop pawl end; raising the lever lowers the second stop pawl end and raises the first stop pawl end. The end of the rotating shaft is secured to the middle part of the pawl with a clamp to prevent the pawl from detaching from the end of the rotating shaft. (Slot 8 is shown in the image.) Figure 1 As shown, the slot is tilted from top to bottom, which makes it easy to lift the lever and press down the pawl.

[0024] The elastic component includes a spring and an elastic post. A vertical mounting groove is formed in the base. The top of the spring is pressed and fixed within the groove. The upper section of the elastic post extends into the groove and is secured to the spring. The lower section of the elastic post points vertically downwards and has a ball head 17 on its bottom end face. When the pawl is pressed down, the elastic post moves downwards under the elastic force of the spring, causing the ball head to press against one side of the triangular protrusion, preventing the first stop pawl from falling off. When the pawl is raised, the ball head presses against the other side of the triangular protrusion, preventing the second stop pawl from falling off, further improving safety during construction. Only when the force of lifting or pressing down the lever exceeds the downward force of the spring, and the pawl presses the elastic post upwards, compressing the spring within the vertical mounting groove, can the first and second stop pawls be switched and inserted into the toothed grooves on both sides of the ratchet.

[0025] A cover plate 18 is installed on one side of the base to cover the ratchet. The cover plate is fixed to the side of the base with screws or bolts to cover the ratchet, thus effectively protecting the ratchet. In addition, the cover plate has a through hole for the cradle shaft to extend into the base. Then, the cradle shaft is connected to the motor main shaft through the bearing between the cover plate and the ratchet, so that the cradle can rotate.

[0026] The bottom of the first stop pawl is a first engagement angle portion that meshes with the ratchet. One side of the first engagement angle portion is a first vertical edge 11 that clockwise engages with the ratchet teeth in the ratchet's tooth groove, and the other side is a first inclined edge 12 that allows the ratchet teeth to slide counterclockwise in the ratchet's tooth groove. A first slope portion 13, inclined towards the first vertical edge and meshing with the inner wall of the ratchet's tooth groove, is provided at the connection between the first vertical edge and the first inclined edge. After the first stop pawl is inserted into the ratchet's tooth groove, the first vertical edge 11 of its first engagement angle portion engages with the ratchet teeth when the ratchet rotates clockwise, thus preventing clockwise rotation. When the ratchet rotates counterclockwise, the first inclined edge 12 allows the ratchet teeth to slide on the first inclined edge. At this time, the first slope portion 13 also meshes with the ratchet, allowing the ratchet to rotate counterclockwise. When the ratchet rotates counterclockwise, the rocker arm is in a reverse state, which can lift the soil lifting device upwards from the bored pile of the line foundation.

[0027] The bottom of the second stop pawl is a second engagement angle that meshes with the ratchet. One side of the second engagement angle is a second vertical edge 14 that locks the ratchet teeth counterclockwise in the ratchet's tooth groove, and the other side is a second inclined edge 15 that allows the ratchet teeth to slide clockwise in the ratchet's tooth groove. A second slope 16, inclined towards the second vertical edge and conforming to the inner wall of the ratchet's tooth groove, is provided at the connection between the second vertical edge and the second inclined edge. After the second stop pawl is inserted into the ratchet's tooth groove, the second vertical edge 14 of its second engagement angle locks the ratchet teeth when the ratchet rotates counterclockwise, thus preventing the ratchet from rotating counterclockwise. The second inclined edge 15 allows the ratchet teeth to slide on the first inclined edge when the ratchet rotates clockwise. At this time, the second inclined edge 16 also meshes with the ratchet, allowing the ratchet to rotate clockwise. When the ratchet rotates clockwise, the rocker arm is in a forward rotation state, allowing the soil-lifting rocker to be lowered into the bored pile of the line foundation.

[0028] The above embodiments are only used to illustrate the detailed solution of this utility model. This utility model is not limited to the above detailed solution, that is, it does not mean that this utility model must rely on the above detailed solution to be implemented. Those skilled in the art should understand that any improvement to this utility model, equivalent substitution of the raw materials of this utility model product, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of this utility model.

Claims

1. A backstop device for a cradle frame of bored piles for railway foundations, characterized in that, The device includes a base (1) that is connected to the rocker arm after the motor spindle extends into it. A ratchet (2) is fixedly installed on the motor spindle inside the base. A rotating shaft (3) is installed on the base above the ratchet. A pawl (4) is installed on the rotating shaft. The pawl has a triangular protrusion (5) protruding upward. An elastic element (6) is installed on the base above the triangular protrusion, which presses against one side of the triangular protrusion when the pawl rotates and lifts along the rotating shaft and presses against the other side of the triangular protrusion when the pawl rotates and presses down along the rotating shaft. A lever (7) extends out from one end of the pawl. A slot (8) is provided on the base for the lever to extend and move upward and downward. A first stop pawl (9) extends downward from one end of the pawl at the lever end and inserts into the tooth groove of the ratchet when the pawl is pressed down, allowing the ratchet to rotate counterclockwise and lock clockwise. A second stop pawl (10) extends downward from the other end of the pawl and inserts into the tooth groove of the ratchet when the pawl is lifted, allowing the ratchet to rotate clockwise and lock counterclockwise.

2. The backstop device for the cradle of bored piles for railway foundations according to claim 1, characterized in that, The bottom of the first stop pawl is a first engagement angle that meshes with the ratchet. One side of the first engagement angle is a first vertical edge (11) that clockwise engages with the ratchet teeth in the ratchet's tooth groove, and the other side is a first inclined edge (12) that allows the ratchet teeth to slide counterclockwise in the ratchet's tooth groove.

3. The backstop device for the cradle of bored piles for railway foundations according to claim 2, characterized in that, At the connection between the first vertical edge and the first inclined edge, a first ramp (13) is provided that is inclined toward the first vertical edge and engages with the inner wall of the tooth groove of the ratchet.

4. The backstop device for the cradle of bored piles for railway foundations according to claim 1, characterized in that, The bottom of the second stop pawl is a second engagement angle that meshes with the ratchet. One side of the second engagement angle is a second vertical edge (14) that clamps the ratchet teeth counterclockwise in the ratchet tooth groove, and the other side is a second inclined edge (15) that allows the ratchet teeth to slide clockwise in the ratchet tooth groove.

5. The backstop device for the cradle of bored piles for railway foundations according to claim 4, characterized in that, At the connection between the second vertical edge and the second inclined edge, a second inclined slope (16) is provided that is inclined toward the second vertical edge and fits against the inner wall of the ratchet tooth groove.

6. The backstop device for the cradle of bored piles for railway foundations according to claim 1, characterized in that, The elastic element includes a spring and an elastic post. One end of the spring is connected to the elastic post, and the other end is fixed inside the base.

7. The backstop device for the cradle of bored piles for railway foundations according to claim 6, characterized in that, The end face at the bottom of the elastic column is provided with a ball head (17).

8. The backstop device for the cradle of bored piles for railway foundations according to claim 1, characterized in that, A cover plate (18) is installed on one side of the base to cover the ratchet.

9. The backstop device for the cradle of bored piles for railway foundations according to claim 8, characterized in that, A bearing (19) connecting the motor spindle and the rocker arm is provided between the cover plate and the ratchet.

Images