Automatic pin inserting and pulling device for mounting crane fly jib

Abstract

The automatic pin inserting and pulling device comprises an upper sleeve, a lower sleeve, an upper pin shaft, a lower pin shaft, an inner threaded pipe and a lead screw, the upper portion of the lower sleeve is arranged in the lower portion of the upper sleeve in a sleeved mode, the upper pin shaft is connected to the top end of the upper sleeve, the lower pin shaft is connected to the bottom end of the lower sleeve, and the inner threaded pipe is connected to the lead screw. The inner threaded pipe is arranged on the side of the upper sleeve and fixedly connected with the upper sleeve, the lead screw is arranged on the side of the lower sleeve, the bottom of the lead screw is rotationally connected with the connecting base through a bearing, the connecting base is fixedly connected with the lower portion of the lower sleeve, and the lead screw extends upwards into the inner threaded pipe and is in threaded connection with the inner threaded pipe. According to the invention, the mounting operation of connection of the auxiliary arm and the main arm of the crane can be quickly realized, the whole mounting process is simple and quick, the mounting precision of the auxiliary arm is high, and the safety of the auxiliary arm during high-altitude operation is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of crane booms, in particular to an automatic pin insertion and extraction device for installing a crane auxiliary boom. Background Art

[0002] During the hoisting process, cranes often require a higher lifting height and a suitable range. The main arm alone cannot cover the required working conditions. The use of the crane jib achieves a higher lifting height and a wider working range. When the jib of a small and medium-sized crane is not in use, it is usually fixed to the side of the basic arm of the main arm. When the jib is needed for hoisting operations, it is rotated from the side of the main arm to the front, and then connected to the main arm using four pins.

[0003] When removing and installing the pin shaft, it is necessary to use a ladder to climb up the crane and use a sledgehammer to hammer the pin shaft to install and remove the pin shafts of the jib. It has the following defects: 1) During the installation and removal of the jib, the workers need to perform long-term high-altitude operations, which poses a safety hazard; 2) When installing and removing the pin shaft of the jib, it is necessary to use a hammer to hit the pin shaft, which is very time-consuming and laborious; 3) During the use and recovery of the jib, the time spent on inserting and removing the pin accounts for 70% of the total time, which greatly reduces the work efficiency; 4) There are different degrees of deviations between the installation hole of the jib support and the axis of the pin shaft hole on the main arm, which brings great troubles to the use of the jib. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an automatic pin insertion and extraction device for the installation of a crane jib, which can quickly realize the installation operation of connecting the crane jib and the main arm. The entire installation process is simple and fast, and the installation accuracy of the jib is high, ensuring the safety of the jib during high-altitude operations.

[0005] The technical solution of the present invention is:

[0006] The invention discloses an automatic pin insertion and extraction device for installing a crane jib, comprising an upper sleeve, a lower sleeve, an upper pin shaft, a lower pin shaft, an internally threaded tube and a lead screw. The upper part of the lower sleeve is sleeved in the lower part of the upper sleeve, the upper pin shaft is connected to the top end of the upper sleeve, the lower pin shaft is connected to the bottom end of the lower sleeve, the internally threaded tube is arranged on the side of the upper sleeve and the axis of the internally threaded tube is parallel to the axis of the upper sleeve, the internally threaded tube is fixedly connected to the upper sleeve, the lead screw is arranged on the side of the lower sleeve and the axis of the lead screw is parallel to the axis of the lower sleeve, the bottom of the lead screw is rotatably connected to a connecting seat through a bearing, the connecting seat is fixedly connected to the lower part of the lower sleeve, and the lead screw extends upward into the internally threaded tube and is threadedly connected to the internally threaded tube.

[0007] The top of the upper sleeve is provided with a vertically extending upper waist-shaped hole, the bottom of the lower sleeve is provided with a vertically extending lower waist-shaped hole, the side wall of the upper pin shaft adjacent to the bottom end is fixedly connected with a horizontally set upper limit pin, and the side wall of the lower pin shaft adjacent to the bottom end is fixedly connected with a horizontally set lower limit pin, the bottom of the upper pin shaft is located in the upper sleeve and the upper limit pin passes through the upper waist-shaped hole, the top of the lower pin shaft is located in the lower sleeve and the lower limit pin passes through the lower waist-shaped hole.

[0008] The top, middle and bottom of the internally threaded pipe are fixedly connected to the upper sleeve through a connecting plate.

[0009] The connecting seat is provided with two through holes, the lower sleeve passes through one of the through holes of the connecting seat and the lower part of the lower sleeve is fixedly connected to the connecting seat, the bottom end of the screw rod is fixedly connected with a screw turntable, the screw rod passes upward through the other through hole of the connecting seat, a retaining spring and a bearing are provided in the other through hole of the connecting seat, the bottom of the screw rod is clamped and connected to the connecting seat by the retaining spring to achieve axial limitation, and is rotatably connected to the connecting seat through the bearing.

[0010] Advantages of the present invention:

[0011] (1) The present invention can realize the installation and removal of the pin shaft (upper pin shaft and lower pin shaft) of the auxiliary arm on the ground, avoiding the high-altitude operation and improving the safety of the operation.

[0012] (2) The present invention adjusts the distance between the upper and lower pins by rotating the screw rod, thereby realizing rapid installation and removal of the pins, greatly saving labor and improving the efficiency of auxiliary arm installation.

[0013] (3) The upper and lower pins of the present invention enter the upper and lower pin holes and the mounting holes of the main arm and the auxiliary arm at the same time, thereby offsetting the accumulated deviation caused by the installation sequence of the pins and improving the accuracy of the auxiliary arm installation.

[0014] (4) The present invention provides waist-shaped holes on the upper and lower sleeves, and allows the limit pins horizontally provided on the pin shaft to pass through the waist-shaped holes, so that the upper and lower pin shafts can be precisely adjusted within a small range, further improving the installation accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view of the automatic pin insertion and extraction device of the present invention.

[0016] Figure 2 It is a cross-sectional view of the automatic pin insertion and extraction device of the present invention.

[0017] Figure 3 yes Figure 2 Enlarged view of part A in .

[0018] Figure 4 It is a schematic diagram of the structure of the present invention connected to the auxiliary arm and arranged on the side of the main arm.

[0019] Figure 5 yes Figure 4 Enlarged view of part B in .

[0020] Figure 6 It is a schematic diagram of the local structure of the connection between the auxiliary arm and the main arm.

[0021] Figure markings: 1-upper sleeve, 101-upper waist-shaped hole, 2-lower sleeve, 201-lower waist-shaped hole, 3-upper pin shaft, 301-upper limit pin, 4-lower pin shaft, 401-lower limit pin, 5-inner threaded tube, 6-screw, 7-connecting plate, 8-connecting seat, 9-screw swivel, 10-circlip, 11-bearing, 01-main arm, 111-proximal mounting hole on the main arm, 112-distal mounting hole on the main arm, 02-auxiliary arm, 21-connecting frame, 211-proximal mounting support, 212-distal mounting support, 03-automatic pin plugging and unplugging device. DETAILED DESCRIPTION

[0022] 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.

[0023] See Figure 1-Figure 3 , an automatic pin insertion and extraction device for installing a crane jib, comprising an upper sleeve 1, a lower sleeve 2, an upper pin shaft 3, a lower pin shaft 4, an internal threaded tube 5 and a lead screw 6, wherein the upper part of the lower sleeve 2 is sleeved in the lower part of the upper sleeve 1;

[0024] The top of the upper sleeve 1 is provided with a vertically extending upper waist-shaped hole 101, the bottom of the lower sleeve 2 is provided with a vertically extending lower waist-shaped hole 201, the side wall of the upper pin shaft 3 adjacent to the bottom end is fixedly connected with a horizontally arranged upper limit pin 301, the side wall of the lower pin shaft 4 adjacent to the bottom end is fixedly connected with a horizontally arranged lower limit pin 401, the bottom of the upper pin shaft 3 is located in the upper sleeve 1 and the upper limit pin 301 passes through the upper waist-shaped hole 101, the top of the lower pin shaft 4 is located in the lower sleeve 2 and the lower limit pin 401 passes through the lower waist-shaped hole 201;

[0025] The internal threaded tube 5 is arranged on the side of the upper sleeve 1 and the axis of the internal threaded tube 5 is parallel to the axis of the upper sleeve 1. The top, middle and bottom of the internal threaded tube 5 are fixedly connected to the upper sleeve 1 through the connecting plate 7. The lead screw 6 is arranged on the side of the lower sleeve 2 and the axis of the lead screw 6 is parallel to the axis of the lower sleeve 2. The bottom of the lead screw 6 is rotatably connected to the connecting seat 8. Two through holes are provided on the connecting seat 8. The lower sleeve 2 passes through one of the through holes of the connecting seat 8 and the lower part of the lower sleeve 2 is fixedly connected to the connecting seat 8. The bottom end of the lead screw 6 is fixedly connected with a lead screw swivel 9. The lead screw 6 passes through the other through hole of the connecting seat 8 upward. A retaining spring 10 and a bearing 11 are provided in the other through hole of the connecting seat 8. The bottom of the lead screw 6 is clamped and connected to the connecting seat 8 by the retaining spring 10 to achieve axial limitation. It is rotatably connected to the connecting seat 8 through the bearing 11. The lead screw 6 extends upward into the internal threaded tube 5 and is threadedly connected to the internal threaded tube 5.

[0026] See Figure 4 and Figure 5 When the auxiliary arm 02 is not in use, the auxiliary arm 02 is usually fixed to the side of the main arm 01. At this time, the two automatic pin plugging and pulling devices 03 are respectively connected to the proximal mounting support 211 and the distal mounting support 212 of the connecting frame 21 at the head end of the auxiliary arm 02. The upper pin shaft 3 and the lower pin shaft 4 of the two automatic pin plugging and pulling devices 03 pass through the upper pin shaft hole and the lower pin shaft hole on the proximal mounting support 211 of the auxiliary arm 02, and the upper pin shaft hole and the lower pin shaft hole on the distal mounting support 212;

[0027] See Figure 6When it is necessary to connect the auxiliary arm 02 to the main arm 01, the lead screw 6 is adjusted by rotating the lead screw turntable 9 so that the upper pin shaft 3 and the lower pin shaft 4 of each automatic pin plugging and extracting device 03 are synchronously moved out from the upper pin shaft hole and the lower pin shaft hole on the proximal mounting support 211 and the distal mounting support 212, and then the auxiliary arm 02 is rotated until the upper pin shaft hole and the lower pin shaft hole on the proximal mounting support 211 of the auxiliary arm 02 are completely overlapped with the proximal mounting hole 111 on the main arm 01, and then the lead screw 6 is adjusted again so that the upper pin shaft 3 of the automatic pin plugging and extracting device 03 on the proximal mounting support 211 passes through the upper pin shaft hole on the proximal mounting support 211 and the proximal mounting hole 111 (above) on the main arm 01, and the lower pin shaft 4 passes through the proximal mounting support 211 The lower pin shaft hole on the upper arm and the proximal mounting hole 111 (below) on the main arm 01 realize the installation connection of the proximal upper and lower pin shafts; then the auxiliary arm 02 takes the upper pin shaft 3 and the lower pin shaft 4 at the proximal end as the rotation axis, and rotates around them until the upper pin shaft hole and the lower pin shaft hole on the distal mounting support 212 of the auxiliary arm 02 are completely overlapped with the distal mounting hole 112 on the main arm 01, and then the upper pin shaft 3 of the automatic pin plugging and pulling device 03 on the distal mounting support 212 passes through the upper pin shaft hole on the distal mounting support 212 and the distal mounting hole 112 (above) on the main arm 01, and the lower pin shaft 4 passes through the lower pin shaft hole on the distal mounting support 212 and the distal mounting hole 112 (below) on the main arm 01, to realize the installation connection of the distal upper and lower pin shafts.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic pin insertion and extraction device for installing a crane jib, characterized in that: It includes an upper sleeve, a lower sleeve, an upper pin shaft, a lower pin shaft, an internally threaded tube and a lead screw. The upper part of the lower sleeve is sleeved in the lower part of the upper sleeve, the upper pin shaft is connected to the top end of the upper sleeve, the lower pin shaft is connected to the bottom end of the lower sleeve, the internally threaded tube is arranged on the side of the upper sleeve and the axis of the internally threaded tube is parallel to the axis of the upper sleeve, the internally threaded tube is fixedly connected to the upper sleeve, the lead screw is arranged on the side of the lower sleeve and the axis of the lead screw is parallel to the axis of the lower sleeve, the bottom of the lead screw is rotatably connected to the connecting seat through a bearing, the connecting seat is fixedly connected to the lower part of the lower sleeve, and the lead screw extends upward into the internally threaded tube and is threadedly connected to the internally threaded tube.

2. The automatic pin insertion and extraction device for crane jib installation according to claim 1, characterized in that: The top of the upper sleeve is provided with a vertically extending upper waist-shaped hole, the bottom of the lower sleeve is provided with a vertically extending lower waist-shaped hole, the side wall of the upper pin shaft adjacent to the bottom end is fixedly connected with a horizontally set upper limit pin, and the side wall of the lower pin shaft adjacent to the bottom end is fixedly connected with a horizontally set lower limit pin, the bottom of the upper pin shaft is located in the upper sleeve and the upper limit pin passes through the upper waist-shaped hole, the top of the lower pin shaft is located in the lower sleeve and the lower limit pin passes through the lower waist-shaped hole.

3. The automatic pin insertion and extraction device for crane jib installation according to claim 1, characterized in that: The top, middle and bottom of the internally threaded pipe are fixedly connected to the upper sleeve through a connecting plate.

4. The automatic pin insertion and extraction device for crane jib installation according to claim 1, characterized in that: The connecting seat is provided with two through holes, the lower sleeve passes through one of the through holes of the connecting seat and the lower part of the lower sleeve is fixedly connected to the connecting seat, the bottom end of the screw rod is fixedly connected with a screw turntable, the screw rod passes upward through the other through hole of the connecting seat, a retaining spring and a bearing are provided in the other through hole of the connecting seat, the bottom of the screw rod is clamped and connected to the connecting seat by the retaining spring to achieve axial limitation, and is rotatably connected to the connecting seat through the bearing.

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