Electric pole pile extractor

Abstract

The invention belongs to the technical field of electric power construction, and particularly discloses an electric pole pile extractor which comprises a support, a lifting mechanism is arranged on the support, and a lock catch assembly is hung on the lifting mechanism and used for buckling the inner wall of an electric pole foundation. The lifting mechanism is used for driving the lock catch assembly to ascend and descend. The lock catch assembly comprises an installation piece, a lock hook body, a swing unit, a connecting sleeve and a lock catch sleeve. The lock catch sleeve is in axial sliding fit with the connecting sleeve, the mounting piece is connected with the connecting sleeve, the mounting piece is located below the lock catch sleeve, and the top end of the mounting piece can abut against the bottom end of the lock catch sleeve; a plurality of clamping jaws which are distributed in the circumferential direction are hinged to the mounting part, and each clamping jaw is hinged to the lock catch sleeve through a connecting rod; the lock hook body is connected with the connecting sleeve through the swing unit, and the swing unit can drive the connecting sleeve to swing. The resistance for pulling out the electric pole foundation can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of electric power construction, and in particular to an electric pole pile puller. Background Art

[0002] The transformation of rural power grids involves a large amount of work, which requires the removal of a large number of poles left in the fields.

[0003] How to effectively solve the problem of pole foundations left in the fields during the removal of old poles is particularly important. How to prevent old pole foundations from being left in the fields and causing injuries, which affects people's farming, has become the current top priority. The pole foundation generally has a small inner diameter. The existing technology generally uses a clamping tool to clamp the exposed end from the outside and pull it out by various manpower or equipment. However, for pole foundations with shorter exposed parts, it is necessary to pre-dig out the soil around the foundation and extend the exposed section in order to effectively clamp and pull out the piles, resulting in low efficiency and increased labor intensity.

[0004] In order to solve the above technical problems, in the prior art, a patent with publication number CN211470618U discloses a pole pile puller, which includes a bracket, a lifting mechanism is arranged on the bracket, a lock assembly is suspended on the lifting mechanism, and the lock assembly is used to buckle the inner wall of the pole foundation; the lifting mechanism is used to drive the lock assembly to rise and fall. Figure 6 As shown, the lock assembly includes a lock hook body, a lock sleeve movably sleeved on the lock hook body, and also includes a plurality of evenly distributed annular claws rotatably connected to the lock hook body, and each claw is hinged to the lock sleeve through a connecting rod. When in use, the pile puller is lowered into the inside of the pole foundation, and the inner wall of the pole foundation pushes each claw to retract inward, and the claws move upward to push the connecting rod to rotate, thereby jointly pushing the lock sleeve upward, so that the application can extend into the inside of the pole foundation with a smaller aperture. After it is in place, the worker lifts the lock hook body through the hand hoist, and the mounting part moves upward accordingly, so that each claw opens and buckles the inner wall of the pole, and continues to lift the lock hook body to pull out the pole foundation.

[0005] The above-mentioned pole pile puller was developed by our company. During actual application, the following defects were found: since the pole foundation is buried in the field for a long time, the pole foundation is in close contact with the soil after being buried in the field. Therefore, when the pole foundation is pulled upward, the resistance is very large, and it is difficult to pull out the pole foundation easily; in addition, when the pole foundation is pulled out upward, it is easy to cause a large load on the lifting mechanism to pull upward, which will affect the service life of the lifting mechanism under long-term use. Summary of the invention

[0006] The invention provides an electric pole pile puller, aiming to reduce the resistance of pulling out the electric pole foundation.

[0007] The present invention is implemented by the following technical scheme: an electric pole pile puller, comprising a bracket, a lifting mechanism is arranged on the bracket, a lock assembly is suspended on the lifting mechanism, and the lock assembly is used to buckle the inner wall of the electric pole foundation; the lifting mechanism is used to drive the lock assembly to rise and fall, and the lock assembly includes a mounting part, a lock hook body, a swing unit, a connecting sleeve and a lock sleeve;

[0008] The locking sleeve and the connecting sleeve are axially slidably matched, the mounting piece is connected to the connecting sleeve, the mounting piece is located below the locking sleeve, and the top end of the mounting piece can abut against the bottom end of the locking sleeve;

[0009] The mounting member is hinged with a plurality of circumferentially distributed claws, each of which is hinged with the lock sleeve via a connecting rod; the lock hook body is connected to the connecting sleeve via the swing unit, and the swing unit can drive the connecting sleeve to swing.

[0010] Compared with the prior art, this solution has the following advantages and beneficial effects:

[0011] In this solution, the lifting mechanism drives the entire locking assembly to move downward. When the claw contacts the end of the pole foundation, it will shrink inward, so that multiple claws can smoothly enter the interior of the pole foundation, and the end of the claw will contact the inner wall of the pole foundation, but at this time the claw and the pole foundation are not fastened. Since the claw and the locking sleeve are connected by a connecting rod, when the claw shrinks inward, it will push the locking sleeve to move upward along the connecting sleeve. When the claw moves to the specified position inside the pole foundation, the entire locking assembly is lifted upward, which will gradually drive the connecting sleeve and the mounting piece to move upward until the top of the mounting piece abuts against the bottom of the locking sleeve. Under the action of the connecting rod, the claw will be pushed outward to expand, so that the claw and the inner wall of the pole foundation are tightly abutted. In this way, as the connecting sleeve continues to be lifted, it will drive the pole foundation to move upward and be pulled out of the field.

[0012] In the present solution, since a swing unit is provided, when the claw moves to the pole foundation, the swing unit can be started to drive the connecting sleeve and the mounting part to swing, thereby having an impact on the pole foundation and loosening the soil around the pole foundation in advance. In this way, when the pole foundation is pulled out, the resistance of the field soil to the pole foundation can be effectively reduced, so that the pole foundation can be pulled out more easily and quickly, and the loss of the lifting mechanism can be reduced, thereby increasing the service life of the lifting mechanism.

[0013] Further, the swing unit includes a driving motor, a rotating drum, a connecting block, a swing frame and a connecting frame, the bottom end of the lock hook body is connected to a fixing plate, the driving motor is connected to the fixing plate, the connecting frame is connected to the fixing plate, the connecting block is connected to the output shaft of the driving motor, one end of the rotating drum is eccentrically connected to the connecting block, and one end of the rotating drum connected to the connecting block is eccentrically arranged with the output end of the driving motor;

[0014] The two ends of the swing frame are rotatably connected to the two ends of the connecting frame respectively, and the rotating drum is rotatably connected to the other two ends of the swing frame; the rotating drum is tilted, and the other end of the rotating drum is connected to the connecting sleeve.

[0015] Beneficial effect: In this scheme, the swing unit divides the lock assembly into two parts, the part located above the swing unit, that is, the lock hook body is connected to the lifting mechanism, and is responsible for driving the lock assembly to move up and down; and the part located below the swing unit, that is, the whole composed of the connecting sleeve, the mounting part and the lock sleeve can swing under the action of the swing unit, thereby loosening the soil around the pole foundation, making it easy to lift out the pole foundation.

[0016] In the swing unit of the present scheme, the rotating drum is eccentrically connected to the connecting block, so that the rotating drum is not coaxial with the output end of the driving motor, but is eccentrically arranged with the output end of the driving motor, and the connection between the rotating drum and the swing frame is coordinated. When the driving motor drives the connecting block to rotate, the swing frame will produce a reciprocating up and down swinging movement, and the rotating drum will produce a composite motion of circumferential rotation and up and down left and right swinging under the driving action of the swing frame and the driving motor, thereby driving the connecting sleeve and other structures connected to the connecting sleeve to perform a composite motion of circumferential rotation + swinging, so that a reciprocating circumferential collision movement can be generated on the pole foundation, and the pole foundation and the soil can be loosened, which saves more effort when pulling out the pole foundation and facilitates pulling out the pole foundation.

[0017] During actual use, the mounting piece can be driven to swing by the swing unit to hit the pole foundation to loosen it and then the pole foundation can be pulled out. The pole foundation can also be hit to loosen the soil during the process of pulling out the pole foundation.

[0018] Furthermore, the two inner side walls of the connecting frame are vertically connected with a fixed cylinder, one of the two ends of the swing frame is connected with a first swivel ring, and the other two ends of the swing frame are connected with a second swivel ring, and the two first swivel rings are respectively rotatably matched with the two fixed cylinders; a rotating shaft is passed through the upper edge of the rotating cylinder perpendicular to its axial direction, and the two ends of the rotating shaft are respectively rotatably matched with the two second swivel rings.

[0019] Beneficial effect: In this scheme, the two ends of the swing frame are rotatably connected to the fixed cylinder through the first rotating ring, so that the entire swing frame can swing up and down, and the two second rotating rings on the swing frame rotate in coordination with the rotating shaft on the rotating cylinder, so that the rotating cylinder can swing and rotate circumferentially smoothly, and limit the position of the rotating cylinder.

[0020] Furthermore, the top end of the connecting sleeve is connected to a swing plate, the swing plate is tilted, and the bottom end of the rotating drum is detachably connected to the swing plate.

[0021] Beneficial effect: The setting of the swing plate in this solution makes it easier to install and connect the rotating drum and the connecting sleeve, and the rotating and swing plate are detachably connected, so that it is easy to separate the swing unit from the connecting sleeve, which is convenient for carrying and reduces the transportation and carrying volume.

[0022] Furthermore, it also includes a controller, a sensor is connected to the upper part of the connecting sleeve, and the sensor and the drive motor are electrically connected to the controller; when the claw retracts inward, it can push the locking sleeve to slide upward, and the sensor can detect the position of the locking sleeve and transmit a signal to the controller, and the controller controls the start and stop of the drive motor.

[0023] Beneficial effect: In this scheme, when the claw enters the inside of the pole foundation, it will shrink inward, and when the claw shrinks inward, it will push the locking sleeve to move upward under the action of the connecting rod. In this way, after the locking sleeve moves upward, the sensor can detect the position information of the locking sleeve and transmit the position signal of the locking sleeve to the controller, and the controller controls the start and stop of the drive motor. In this scheme, when the claw is completely located in the pole foundation after shrinking, the controller can control the start and stop of the drive motor, thereby driving the swing unit to work and drive the pole foundation to shake, thereby loosening the soil around the pole foundation. When the swing unit works for the set time, the controller controls the drive motor to stop, thereby stopping the swing.

[0024] Furthermore, the sensor is a pressure sensor or a position sensor.

[0025] Beneficial effect: The sensor of this solution can be a pressure sensor. When the lock sleeve moves upward, it will generate pressure on the pressure sensor, so that the pressure sensor will transmit a signal to the controller. The sensor can also be a position sensor, which can detect the distance position information of the lock sleeve through position sensing, and thus transmit the position information to the control.

[0026] Furthermore, the controller is a delay controller, and when the delay controller receives a signal from a sensor, it delays the control to start the drive motor.

[0027] Beneficial effect: The controller in this scheme is a delay controller, which makes it easy to delay the control of the start of the drive motor, and avoids the situation where the controller immediately controls the start of the drive motor after the sensor sends a signal after the claw contracts and pushes the locking sleeve upward, while the claw enters a relatively shallow position in the pole foundation. In this scheme, when the claw contracts to the inside of the pole foundation, the lifting mechanism can continue to drive the mounting part to move downward, so that the claw on the mounting part can extend into a deeper position inside the pole foundation, and then the controller controls the start of the drive motor. Compared with swinging when the mounting part is located at the upper part of the pole foundation, in this scheme, the mounting part can enter a deeper depth into the pole foundation and then drive the mounting part to swing, so that the mounting part can loosen the soil in the middle and lower parts of the pole foundation during the swinging process, and the loosening area is larger, the loosening effect is better, and it is easier to remove the pole foundation.

[0028] Furthermore, the controller is a delay controller, which is electrically connected to the lifting mechanism. After receiving a signal from a sensor, the delay controller delays and controls the lifting mechanism to stop driving the lock assembly to move downward.

[0029] Beneficial effect: The controller in this scheme can control the start and stop of the lifting mechanism, and the controller in this scheme is a delay controller, so that after the mounting part and the claw enter the pole foundation and continue to move a distance toward the bottom of the pole foundation, the lifting mechanism can be controlled to stop driving the locking assembly to move downward.

[0030] Furthermore, a slider is provided inside the connecting sleeve for axial sliding cooperation, a spring is connected between the slider and the bottom of the connecting sleeve, a hinge block is connected to the top of the slider, a plurality of push rods are hinged on the hinge block, and the ends of the push rods away from the hinge block are respectively hinged to a plurality of claws, a plurality of vertical grooves are provided on the connecting sleeve along its circumference, and the plurality of push rods pass through the plurality of vertical grooves in sequence and can swing in the vertical grooves.

[0031] Beneficial effect: In this solution, the two ends of the push rod are hinged to the hinge block and the claw respectively, and the slider and the connecting sleeve are axially slidably matched. When the claw is in an open state, the push rod can be pressed against the claw under the action of the spring. In this way, when the entire locking assembly is lifted upward, the push rod can generate an outward thrust on the claw, so that the claw can play a stable and tight clamping effect on the inner wall of the pole foundation. In this way, when the pole foundation is clamped by the locking assembly and is lifted upward, the claw can tightly clamp the inner wall of the pole foundation, effectively avoiding the risk of the pole foundation loosening and falling during the process of being pulled up.

[0032] When the lock assembly moves downward and enters the pole foundation, when the claw contacts the inner wall of the pole foundation and contracts inward, the push rod can push the slider downward and the spring is compressed, so that the claw can smoothly contract inward to avoid being restricted by the push rod.

[0033] Furthermore, the bracket includes legs, a chassis and a top plate, the chassis and the top plate are respectively located at the bottom and top of the legs, the lifting mechanism is installed on the top plate, the bottom end of the chassis is connected to a rod, and the end of the rod is conical.

[0034] Beneficial effects: In this solution, the bottom plate is used to contact the ground, which improves the stability of the leg installation, and the insertion rod is easy to insert into the ground, thereby improving the stability of the entire bracket after installation.

[0035] Furthermore, the insertion rod is detachably connected to the chassis.

[0036] Beneficial effect: In this solution, the plug rod and the chassis are detachably connected, so it is easy to choose whether to use the plug rod according to actual working conditions, and the use is more flexible and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0038] Figure 1 It is a longitudinal cross-sectional view of a pole pile puller of the present invention with the clamping claws in an open state;

[0039] Figure 2 It is a top view of the connection between the swing frame and the rotating drum in the electric pole pile puller of the present invention;

[0040] Figure 3 It is a longitudinal cross-sectional view of a pole pile puller of the present invention when the clamping claw is in a retracted state;

[0041] Figure 4 This is a front view of a bracket in an electric pole pile puller of the present invention;

[0042] Figure 5 It is a longitudinal cross-sectional view of another embodiment of an electric pole pile puller of the present invention;

[0043] Figure 6 The present invention is a schematic structural diagram of a locking assembly in an electric pole pile puller in the prior art.

[0044] Marks and corresponding parts names in the attached drawings:

[0045] Mounting seat 1, hinged plate 101, lock hook body 2, hanging hole 201, lock buckle sleeve 3, connecting rod 4, first hinge ring 401, second hinge ring 402, claw 5, connecting sleeve 6, sensor 7, fixed plate 8, swing plate 9, connecting frame 10, drive motor 11, connecting block 12, rotating drum 13, mounting plate 14, fixed cylinder 15, swing frame 16, first swivel 17, second swivel 171, rotating shaft 18, supporting leg 19, lifting mechanism 20, top plate 21, bottom plate 22, plug rod 23, slider 24, spring 25, hinge block 26, push rod 27, vertical slot 28. DETAILED DESCRIPTION

[0046] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0047] Example 1

[0048] like Figure 1-Figure 2 As shown, this embodiment 1 provides an electric pole pile puller, including a bracket, a lifting mechanism 20 is arranged on the bracket, a lock assembly is suspended on the lifting mechanism 20, and the lock assembly is used to buckle the inner wall of the pole foundation; the lifting mechanism 20 is used to drive the lock assembly to rise and fall, and the lifting mechanism 20 in this embodiment can be a hand hoist, an electric telescopic rod or a hydraulic telescopic rod, etc.

[0049] In this embodiment, the lock assembly includes a mounting part, a lock hook body 2, a swing unit, a connecting sleeve 6 and a lock sleeve 3. The lock sleeve 3 and the connecting sleeve 6 are both hollow cylindrical structures, and the lock sleeve 3 and the connecting sleeve 6 are axially slidably matched.

[0050] The mounting piece is connected to the connecting sleeve 6 . In this embodiment, the mounting piece is fixed to the connecting sleeve 6 by welding or threaded connection. The mounting piece is located below the locking sleeve 3 , and the top end of the mounting piece can be abutted against the bottom end of the locking sleeve 3 .

[0051] Six circumferentially distributed claws 5 are hinged on the mounting member, and each claw 5 is hinged to the locking sleeve 3 through a connecting rod 4. Specifically: in this embodiment, the mounting member includes a mounting seat 1 and multiple groups of hinged plates 101. In this embodiment, six groups of hinged plates 101 are provided. The six groups of hinged plates 101 are evenly distributed on the mounting seat 1 in the circumferential direction, and the six groups of hinged plates 101 are interconnected into a whole. The six groups of hinged plates 101 are fixedly connected to the mounting seat 1, and the mounting seat 1 and the six groups of hinged plates 101 are welded and fixed or threadedly connected to the connecting sleeve 6.

[0052] Each set of hinged plates 101 has two hinged plates 101 . The claw 5 is located between the two hinged plates 101 and is hinged to the two hinged plates 101 . In this embodiment, when the claw 5 is in an open state, the top end of the hinged plate 101 abuts against the bottom end of the locking sleeve 3 .

[0053] Each claw 5 is connected to a first hinged ring 401, and six second hinged rings 402 are evenly distributed along the circumference of the outer side of the locking sleeve 3. The two ends of the connecting rod 4 on each claw 5 are respectively hinged to the first hinged ring 401 and the corresponding second hinged ring 402. In this embodiment, the first hinged ring 401 and the second hinged ring 402 are respectively welded and fixed to the claw 5 and the locking sleeve 3 or fixed in other ways.

[0054] In this embodiment, the lock hook body 2 and the connecting sleeve 6 are connected via a swing unit, and the swing unit can drive the connecting sleeve 6 to swing, thereby driving the mounting part to swing.

[0055] In this embodiment, the swing unit includes a driving motor 11, a rotating drum 13, a connecting block 12, a swing frame 16 and a connecting frame 10. The bottom end of the lock hook body 2 is fixedly connected to a fixing plate 8, the driving motor 11 is connected to the fixing plate 8, the connecting frame 10 is connected to the fixing plate 8, and the connecting block 12 is connected to the output shaft of the driving motor 11, so that the driving motor 11 can drive the connecting block 12 to rotate together after starting; one end of the rotating drum 13 is eccentrically connected to the connecting block 12, so that the end of the rotating drum 13 connected to the connecting block 12 is eccentrically arranged with the output end of the driving motor 11, that is, the output end of the rotating drum 13 and the driving motor 11 are not coaxial.

[0056] The two ends of the swing frame 16 are rotatably connected to the two ends of the connecting frame 10, and the rotating drum 13 is rotatably connected to the other two ends of the swing frame 16. Specifically: Figure 1 and Figure 2 As shown, the two inner side walls of the connecting frame 10 are vertically connected with a fixing tube 15, and the fixing tube 15 is fixed to the connecting frame 10 by welding, threading or other methods. The two ends of the swing frame 16 are connected to the first rotating ring 17, and the other two ends of the swing frame 16 are connected to the second rotating ring 171. Figure 2 As shown, in this embodiment, the swing frame 16 is a rectangular frame structure, the two first swivels 17 are respectively connected to the left and right ends of the swing frame 16, and the two second swivels 171 are respectively connected to the front and rear ends of the swing frame 16.

[0057] The two first rotating rings 17 are respectively rotatably matched with the two fixed cylinders 15 through bearings; a rotating shaft 18 is passed through the rotating cylinder 13 perpendicular to its axial direction, and both ends of the rotating shaft 18 are respectively rotatably matched with the two second rotating rings 171 through bearings.

[0058] Combination Figure 1As shown, in this embodiment, the rotating drum 13 is tilted, and the other end of the rotating drum 13 is connected to the connecting sleeve 6. Specifically: the top of the connecting sleeve 6 is connected to the swing plate 9, the swing plate 9 is tilted, and the bottom end of the rotating drum 13 is detachably connected to the swing plate 9. In this embodiment, a mounting plate 14 is fixedly connected to the bottom end of the rotating drum 13, and the mounting plate 14 and the swing plate 9 are detachably fixedly connected by bolts.

[0059] The lifting mechanism 20 is installed on the bracket, and a hanging hole 201 is opened on the upper part of the lock hook body 2. The output end of the lifting mechanism 20 is connected to the hanging hole 201 of the lock hook body 2. The lifting mechanism 20 drives the entire lock assembly to move up and down.

[0060] The specific implementation process is as follows:

[0061] The lifting mechanism 20 drives the entire lock assembly to move downward, so that the mounting piece is placed inside the pole foundation. Figure 3 As shown, the multiple claws 5 on the mounting piece will shrink inward when in contact with the inner wall of the pole foundation. When the claws 5 are squeezed by the inner wall of the pole foundation, the connecting rod 4 will push the locking sleeve 3 to move upward, so that the mounting piece and the claws 5 can smoothly enter the interior of the pole foundation.

[0062] After the lifting mechanism 20 drives the entire lock assembly to move downward to the position, the lifting mechanism 20 is stopped, and then the driving motor 11 is started. The driving motor 11 will drive the connection block 12 to rotate. When the connection block 12 rotates, it will drive the rotating drum 13 to rotate, and the rotation will produce a composite movement of circumferential rotation and up and down left and right swinging under the action of the swing frame 16, thereby driving the connection sleeve 6 and the mounting part connected to the connection sleeve 6 to perform a composite movement of circumferential rotation + swinging, so that the mounting part can produce a reciprocating circumferential collision action on the pole foundation, and play a loosening effect on the pole foundation and the soil. Then, by starting the output end of the lifting mechanism 20 to move upward, the entire lock assembly is lifted upward, and at this time, the connection sleeve 6 moves upward and the claw 5 opens outward to produce a tight clamping effect on the pole foundation. At this time, the lock sleeve 3 moves downward and abuts against the top of the hinged plate 101 on the mounting part, so as to facilitate the extraction of the pole foundation.

[0063] During actual use, the mounting piece can be driven to swing by the swing unit to hit the pole foundation to loosen it and then the pole foundation can be pulled out. The pole foundation can also be hit to loosen the soil during the process of pulling out the pole foundation.

[0064] Example 2

[0065] The difference between this embodiment and embodiment 1 is that: the electric pole pile puller in this embodiment further includes a controller, which can be installed on the lock assembly or on the bracket; Figure 1 and Figure 2 As shown, the upper part of the connecting sleeve 6 is connected with a sensor 7, and the sensor 7 and the driving motor 11 are both electrically connected to the controller.

[0066] During the process of the claw 5 retracting inward, the locking sleeve 3 can be pushed to slide upward, and the sensor 7 can detect the position of the locking sleeve 3 and transmit a signal to the controller, and the controller controls the start and stop of the driving motor 11. The sensor 7 is a pressure sensor 7 or a position sensor 7. In this embodiment, the sensor 7 is described by taking the pressure sensor 7 as an example. When the claw 5 contacts the pole foundation and retracts inside the pole foundation, the claw 5 will cause the connecting rod 4 to push the locking sleeve 3 to move upward and contact the pressure sensor 7, causing the pressure sensor 7 to sense the pressure change and send the pressure signal to the controller. At this time, the controller can control the driving motor 11 to start, thereby driving the connecting sleeve 6 and the mounting part located below the swing unit to swing and loosen the soil around the pole foundation.

[0067] During the above process, the lifting mechanism 20 can continue to drive the entire locking assembly to move downward, so that the mounting part can swing while moving downward, which has a better effect on loosening the soil around the pole foundation.

[0068] Example 3

[0069] The difference between this embodiment and embodiment 2 is that the controller in this embodiment is a delay controller. When the delay controller receives the signal from the sensor 7, it delays the control of the drive motor 11 to start. In this way, when the claw 5 is completely retracted inside the pole foundation, the top of the locking sleeve 3 has contacted the sensor 7, and the sensor 7 will immediately send a signal to the controller. At this time, the controller will delay the control of the drive motor 11 to start, so that the mounting piece and the claw 5 can continue to move downward a specified distance, and the controller will control the drive motor 11 to start, so that the mounting piece will swing after entering a deeper position of the pole foundation.

[0070] This embodiment provides another way to loosen the soil around the pole foundation. In this embodiment, the entire connecting sleeve 6 can be extended deeper into the pole foundation, avoiding interference with other substances in the external environment of the pole foundation during the process of driving the connecting sleeve 6 to swing.

[0071] Example 4

[0072] The difference between this embodiment and embodiment 2 is that in this embodiment, the lifting mechanism 20 adopts an electric telescopic rod or a hydraulic telescopic rod, and the controller is a delay controller, which is electrically connected to the lifting mechanism 20. After the delay controller receives the signal from the sensor 7, it delays and controls the lifting mechanism 20 to stop driving the lock assembly to move downward.

[0073] In this embodiment, when the claw 5 is just retracted into the pole foundation, the lifting mechanism 20 allows the mounting member to continue to move downward to a certain depth of the pole foundation, and then stops driving the locking assembly to continue to move downward, so that the pole foundation can be clamped more stably.

[0074] Example 5

[0075] like Figure 4 As shown, the difference between this embodiment and embodiment 1 is that: the bracket in this embodiment includes a support leg 19, a chassis 22 and a top plate 21, the chassis 22 and the top plate 21 are respectively located at the bottom and top of the support leg 19, and in this embodiment, there are three support legs 19, and the three support legs 19 are evenly distributed along the circumference of the top plate 21, and the bottom end of each support leg 19 is connected to a chassis 22, and the top ends of the three support legs 19 are detachably connected to the top plate 21 by bolts.

[0076] The lifting mechanism 20 is mounted on the top plate, and the bottom end of the chassis 22 is connected with an insertion rod 23, and the end of the insertion rod 23 is tapered. The insertion rod 23 is detachably connected to the chassis 22, and in this embodiment, the insertion rod 23 is threadedly connected to the chassis 22.

[0077] In this embodiment, the base plate is used to contact the ground to improve the stability of the installation of the support leg 19, and the setting of the insertion rod 23 is convenient for insertion into the ground, thereby improving the stability of the entire bracket after installation. In this embodiment, the insertion rod 23 is detachably connected to the chassis 22, so that it is convenient to choose whether to use the insertion rod 23 according to actual working conditions, which is more flexible and convenient to use.

[0078] Example 6

[0079] like Figure 5 As shown, an electric pole pile puller is different from Example 1 in that: in this embodiment, a slider 24 is slidably fitted inside the connecting sleeve 6 along its axial direction, a spring 25 is connected between the slider 24 and the bottom of the connecting sleeve 6, and a hinge block 26 is connected to the top of the slider 24. The hinge block 26 is located in the center of the slider 24 and is vertically connected and fixed to the slider 24.

[0080] There are multiple push rods 27 hinged on the hinge block 26, and the number of the push rods 27 is the same as the number of the claws 5, that is, there are six push rods 27, and the ends of the six push rods 27 away from the hinge block 26 are hinged to the six claws 5 respectively. In this embodiment, the end of the push rod 27 away from the hinge block 26 is hinged to the first hinge ring 401, thereby indirectly realizing the hinge with the claw 5.

[0081] Six vertical slots 28 are formed on the connecting sleeve 6 along its circumference, and the six vertical slots 28 are evenly distributed around the circumference. Six push rods 27 pass through the six vertical slots 28 in sequence and can swing in the vertical slots 28. When the spring 25 is not subjected to external force, one side of the push rod 27 abuts against the top wall of the vertical slot 28.

[0082] The specific implementation process is as follows: when the lifting mechanism 20 drives the lock assembly to move downward and enter the pole foundation, when the claw 5 contacts the inner wall of the pole foundation and retracts inward, the claw 5 will push the end of the push rod 27 connected to the hinge block 26 to move downward and push the slider 24 to slide downward, so that the spring 25 is compressed, so that the claw 5 can retract inward smoothly and avoid being restricted by the push rod 27.

[0083] When it is necessary to lift the lock assembly upwards and pull out the pole foundation, the claw 5 will tend to expand outwards, and under the action of the spring 25, the push rod 27 will generate an outward thrust on the claw 5, so that the claw 5 can stably and tightly clamp the inner wall of the pole foundation. In this way, in the process of being lifted up after the claw 5 clamps the inner wall of the pole foundation, the push rod 27 further tightens the claw 5, so that the claw 5 can clamp the inner wall of the pole foundation more tightly, effectively avoiding the risk of the pole foundation loosening and falling off during the pulling out process.

[0084] It should be noted that the above description of the disclosed embodiments enables professionals and technicians in the field to implement or use the present application. Various modifications to these embodiments will be apparent to professionals and technicians in the field, and the general principles defined herein can be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

[0085] In the description of the present invention, it should be noted that the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0086] In the description of this document, terms such as "up", "down", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", and "longitudinal" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only used to illustrate the relative positional relationships between the various components or components, and do not particularly limit the specific installation orientations of the various components or components.

[0087] In the description of this document, some terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances.

[0088] In the description of this document, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0089] The structures, proportions, sizes, etc. drawn in the drawings in this application are only used to match the contents disclosed in this technical briefing book for technical personnel in this field to understand and read, and are not used to limit the restrictive conditions for the implementation of this application. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0090] The terms used in this document are those common terms currently widely used in the art in consideration of the functions of the present disclosure, but these terms may vary according to the intention of a person of ordinary skill in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in this case, their detailed meanings will be described in the detailed description of the present disclosure. Therefore, the terms used in the document should not be understood as simple names, but rather as an overall description based on the meaning of the terms and the present disclosure.

[0091] Flowcharts or text are used in this document to illustrate the operating steps performed according to the embodiments of the present application. It should be understood that the operating steps in the embodiments of the present application are not necessarily accurately performed in the order of recording. On the contrary, various steps can be processed in reverse order or simultaneously as needed. At the same time, other operations can also be added to these processes, or a certain step or several steps can be removed from these processes.

[0092] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A pole pile puller, comprising a bracket, a lifting mechanism is arranged on the bracket, a lock assembly is suspended on the lifting mechanism, and the lock assembly is used to buckle the inner wall of the pole foundation; the lifting mechanism is used to drive the lock assembly to rise and fall, characterized in that: The lock assembly includes a mounting part, a lock hook body, a swing unit, a connecting sleeve and a lock sleeve; The locking sleeve and the connecting sleeve are axially slidably matched, the mounting piece is connected to the connecting sleeve, the mounting piece is located below the locking sleeve, and the top end of the mounting piece can abut against the bottom end of the locking sleeve; The mounting member is hinged with a plurality of circumferentially distributed claws, each of which is hinged with the lock sleeve via a connecting rod; the lock hook body is connected to the connecting sleeve via the swing unit, and the swing unit can drive the connecting sleeve to swing.

2. The electric pole pile puller according to claim 1, characterized in that: The swing unit comprises a driving motor, a rotating drum, a connecting block, a swing frame and a connecting frame, the bottom end of the lock hook body is connected to a fixing plate, the driving motor is connected to the fixing plate, the connecting frame is connected to the fixing plate, the connecting block is connected to the output shaft of the driving motor, one end of the rotating drum is eccentrically connected to the connecting block, and the end of the rotating drum connected to the connecting block is eccentrically arranged with the output end of the driving motor; The two ends of the swing frame are rotatably connected to the two ends of the connecting frame respectively, and the rotating drum is rotatably connected to the other two ends of the swing frame; the rotating drum is tilted, and the other end of the rotating drum is connected to the connecting sleeve.

3. The electric pole pile puller according to claim 2, characterized in that: The two inner side walls of the connecting frame are vertically connected with a fixed cylinder, two ends of the swing frame are connected with a first swivel ring, and the other two ends of the swing frame are connected with a second swivel ring, and the two first swivel rings are respectively rotatably matched with the two fixed cylinders; a rotating shaft is passed through the upper edge of the rotating cylinder perpendicular to its axial direction, and the two ends of the rotating shaft are respectively rotatably matched with the two second swivel rings.

4. The electric pole pile puller according to claim 2, characterized in that: The top end of the connecting sleeve is connected with a swing plate, the swing plate is tilted, and the bottom end of the rotating drum is detachably connected to the swing plate.

5. The electric pole pile puller according to any one of claims 2 to 4, characterized in that: It also includes a controller, a sensor is connected to the upper part of the connecting sleeve, and the sensor and the drive motor are electrically connected to the controller; the claw can push the locking sleeve to slide upward during the inward contraction process, and the sensor can detect the position of the locking sleeve and transmit a signal to the controller, and the controller controls the start and stop of the drive motor.

6. The electric pole pile puller according to claim 5, characterized in that: The sensor is a pressure sensor or a position sensor.

7. The electric pole pile puller according to claim 5, characterized in that: The controller is a time-delay controller. When the time-delay controller receives a signal from a sensor, it delays the control to start the driving motor.

8. The electric pole pile puller according to claim 5, characterized in that: The controller is a delay controller, which is electrically connected to the lifting mechanism. After receiving a signal from a sensor, the delay controller delays and controls the lifting mechanism to stop driving the lock assembly to move downward.

9. The electric pole pile puller according to claim 1, characterized in that: A slider is provided inside the connecting sleeve for axial sliding cooperation, a spring is connected between the slider and the bottom of the connecting sleeve, a hinge block is connected to the top of the slider, a plurality of push rods are hinged on the hinge block, and the ends of the push rods away from the hinge block are respectively hinged to a plurality of claws, a plurality of vertical grooves are provided on the connecting sleeve along its circumference, and the plurality of push rods pass through the plurality of vertical grooves in sequence and can swing in the vertical grooves.

10. The electric pole pile puller according to any one of claims 2 to 4, characterized in that: The bracket includes legs, a bottom plate and a top plate. The bottom plate and the top plate are respectively located at the bottom and top ends of the legs. The lifting mechanism is installed on the top plate. The bottom end of the bottom plate is connected to a rod, and the end of the rod is tapered.

Images