A cantilever crane column reinforcing device

Abstract

The present application relates to the technical field of cantilever crane, especially to a cantilever crane stand reinforcing device.The present application provides a cantilever crane stand reinforcing device which clamps and fixes the front and back sides and the left and right sides of the lower part of the cantilever crane.A cantilever crane stand reinforcing device comprises a first fixed rod, a clamping block, a first sliding frame and a chassis, the first fixed rod is symmetrically clamped on the left and right sides of the top wall of the chassis, the first sliding frame is slidably connected to the upper part of the first fixed rod, the lower part of the first sliding frame is in contact with the first fixed rod, and the clamping block is installed on the upper part of the first sliding frame, the device further comprises a clamping mechanism and a fixing mechanism, the clamping mechanism is arranged on the upper part of the first sliding frame, and the fixing mechanism is arranged on the top wall of the chassis.The torsion spring exerts force to clamp and fix the front and back sides of the lower part of the cantilever crane stand, so that the cantilever crane stand can be reinforced, and the stability of the cantilever crane stand can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cantilever crane, and particularly relates to a cantilever crane stand reinforcing device. BACKGROUND

[0002] The cantilever crane is a new generation of light lifting equipment made to adapt to modern production, mainly composed of a stand, a rotating arm, a rotating arm device and an electric hoist, the lower end of the stand is fixed on a concrete foundation through foundation bolts, the cantilever is driven to rotate by a cycloidal pin wheel speed reducer, the electric hoist runs linearly left and right on the cantilever I-beam and lifts heavy objects, and the stand supports the cantilever crane. In order to avoid the cantilever crane from shaking due to excessive pressure during use, the stand of the cantilever crane needs to be reinforced.

[0003] In the prior art, the stand of the cantilever crane is only fixed on the ground through foundation bolts, the contact area between the stand and the ground is small, and the stability is relatively poor, which leads to the problem that the cantilever crane is prone to insufficient stability during work, and there is a risk of tilting of the cantilever crane, affecting normal operation and bringing great safety risks. In view of the above problems, we design a cantilever crane stand reinforcing device which clamps and fixes the front and rear sides and the left and right sides of the lower part of the cantilever crane. SUMMARY

[0004] In order to overcome the shortcomings that the stand of the cantilever crane is only fixed on the ground through foundation bolts, the technical problem is to provide a cantilever crane stand reinforcing device which clamps and fixes the front and rear sides and the left and right sides of the lower part of the cantilever crane.

[0005] The technical scheme is as follows: a cantilever crane stand reinforcing device, comprising a first fixing rod, a clamping block, a first sliding frame and a chassis, the first fixing rod is symmetrically clamped on the left and right sides of the top wall of the chassis, the first sliding frame is slidably connected to the upper part of the first fixing rod, the lower part of the first sliding frame is in contact with the first fixing rod, and the upper part of the first sliding frame is provided with the clamping block, further comprising a clamping mechanism and a fixing mechanism, the upper part of the first sliding frame is provided with the clamping mechanism for clamping the left and right sides of the lower part of the cantilever crane stand, and the top wall of the chassis is provided with the fixing mechanism for clamping the front and rear sides of the lower part of the cantilever crane stand.

[0006] As a further preferred scheme, the clamping mechanism comprises a first rotating frame, a threaded rod and a fixing frame, the threaded rod is threadedly connected to the upper part of the first sliding frame, the threaded rod penetrates through the adjacent first fixing rod, the threaded rod is rotatably connected with the first fixing rod, the first fixing rod is sleeved with the fixing frame, the first fixing rod is slidably connected with the fixing frame, the fixing frame is connected with the chassis, and the outer end of the threaded rod is connected with the first rotating frame.

[0007] As a further preferred, the fixing mechanism comprises a base, a first fixing block, a torsion spring and a limiting block, the base is installed on the top wall of the base, the base is located between the two first fixing rods, a circular hole is formed in the middle of the base, the column of the cantilever crane is vertically inserted into the circular hole on the base, the first fixing block is installed on the top wall of the first fixing rod on the front and back sides, the limiting block is rotatably connected to the first fixing block, the torsion spring is wound on the limiting block, and the left and right sides of the torsion spring are connected with the first fixing block and the limiting block.

[0008] As a further preferred, the fixing mechanism comprises a base, a first fixing block, a torsion spring and a limiting block, the base is installed on the top wall of the base, the base is located between the two first fixing rods, a circular hole is formed in the middle of the base, the column of the cantilever crane is vertically inserted into the circular hole on the base, the first fixing block is installed on the top wall of the first fixing rod on the front and back sides, the limiting block is rotatably connected to the first fixing block, the torsion spring is wound on the limiting block, and the left and right sides of the torsion spring are connected with the first fixing block and the limiting block.

[0009] As a further preferred, the fixing mechanism comprises a base, a first fixing block, a torsion spring and a limiting block, the base is installed on the top wall of the base, the base is located between the two first fixing rods, a circular hole is formed in the middle of the base, the column of the cantilever crane is vertically inserted into the circular hole on the base, the first fixing block is installed on the top wall of the first fixing rod on the front and back sides, the limiting block is rotatably connected to the first fixing block, the torsion spring is wound on the limiting block, and the left and right sides of the torsion spring are connected with the first fixing block and the limiting block.

[0010] As a further preferred, the fixing mechanism comprises a base, a first fixing block, a torsion spring and a limiting block, the base is installed on the top wall of the base, the base is located between the two first fixing rods, a circular hole is formed in the middle of the base, the column of the cantilever crane is vertically inserted into the circular hole on the base, the first fixing block is installed on the top wall of the first fixing rod on the front and back sides, the limiting block is rotatably connected to the first fixing block, the torsion spring is wound on the limiting block, and the left and right sides of the torsion spring are connected with the first fixing block and the limiting block.

[0011] As a further preferred, still further comprising a clamping mechanism for clamping the cantilever crane column lower part, the clamping mechanism comprises a sliding bolt, a tension spring, a second fixed block, a first clamping block, a second clamping block and a handle, the second fixed block is uniformly installed on the outer wall of the base, the sliding bolt is slidably connected in the second fixed block, the tension spring is wound on the sliding bolt, the upper and lower ends of the tension spring are connected with the sliding bolt and the second fixed block respectively, the handle is slidably connected on the base, each sliding bolt corresponds to a handle, the sliding bolt slides downward and inserts into the corresponding handle, the first clamping block is installed in the handle, the second clamping block is uniformly installed on the inner wall of the base, and the second clamping block is staggered with the first clamping block.

[0012] As a further preferred, the shape of the base is a circular truncated cone.

[0013] The present application has the following advantages:

[0014] 1. The limiting block is clamped and fixed on the front and rear sides of the cantilever crane column lower part through the elastic force of the torsion spring, so that the cantilever crane column can be reinforced, and the stability of the cantilever crane column is enhanced.

[0015] 2. The clamping block moves inward to contact the cantilever crane column, so that the cantilever crane column is clamped on the left and right sides of the lower part, and the cantilever crane column is further reinforced.

[0016] 3. Since the shape of the base is a circular truncated cone, the support surface of the cantilever crane column and the ground is increased, and the stability of the cantilever crane column is further enhanced.

[0017] 4. The extrusion block moves inward to contact the cantilever crane column, so that the extrusion blocks on the front and rear parts are clamped and fixed on the front and rear sides of the cantilever crane column, and the cantilever crane is further reinforced.

[0018] 5. The convex block moves upward through the rebound of the first pressure spring, so that the pressure on the cantilever of the cantilever crane can be buffered by the first pressure spring and the convex block, the pressure on the cantilever crane column can be dispersed, and the cantilever crane can be kept stable during use.

[0019] 6. The first fixed rod slides up and down, driving the limiting hole on the first fixed rod to move up and down, and the first fixed rod drives the clamping block to move up and down to a specified height through the first sliding frame, so that different cantilever crane columns can be reinforced, and the applicability is strong.

[0020] 7. The first clamping block moves inward to contact the lower part of the cantilever crane column, so that the lower part of the cantilever crane column can be fixed, and the cantilever crane column can be further reinforced. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic view of the three-dimensional structure of the present application.

[0022] Figure 2 is a schematic view of the clamping three-dimensional structure of the present application.

[0023] Figure 3 is a schematic view of the fixing mechanism three-dimensional structure of the present application.

[0024] Figure 4 is a schematic view of the enlarged view of A of the present application.

[0025] Figure 5 is a schematic view of the extrusion mechanism three-dimensional structure of the present application.

[0026] Figure 6 is a schematic view of the buffer mechanism three-dimensional structure of the present application.

[0027] Figure 7 is a schematic view of the adjusting mechanism three-dimensional structure of the present application.

[0028] Figure 8 is a schematic view of the detent mechanism three-dimensional structure of the present application.

[0029] Reference signs: 1 - first fixed rod, 2 - clamping block, 3 - first sliding frame, 4 - base plate, 5 - clamping mechanism, 51 - first rotating frame, 52 - threaded rod, 53 - fixed frame, 6 - fixing mechanism, 61 - base, 62 - first fixed block, 63 - torsion spring, 64 - limiting block, 7 - extrusion mechanism, 71 - second rotating frame, 72 - third rotating frame, 73 - extrusion block, 8 - buffer mechanism, 81 - second fixed rod, 82 - second sliding frame, 83 - first pressure spring, 84 - protruding block, 9 - adjusting mechanism, 91 - third sliding frame, 92 - third fixed rod, 93 - second pressure spring, 94 - fourth sliding frame, 95 - limiting hole, 10 - detent mechanism, 101 - sliding bolt, 102 - tension spring, 103 - second fixed block, 104 - first clamping block, 105 - second clamping block, 106 - handle. DETAILED DESCRIPTION

[0030] The present application is described in detail below in conjunction with the accompanying drawings and specific examples, but is not limited to the present application.

[0031] Example 1

[0032] A cantilever crane stand reinforcing device, such as Figure 1As shown, it comprises first fixed rod 1, clamp block 2, first sliding frame 3, chassis 4, clamping mechanism 5 and fixing mechanism 6, the number of first fixed rod 1 is two, two first fixed rod 1 is respectively clamped in the left and right sides of the top wall of chassis 4, the number of first sliding frame 3 is two, two first sliding frame 3 is respectively slidingly connected on two first fixed rod 1, first sliding frame 3 lower part is in contact with first fixed rod 1, first sliding frame 3 upper part is fixedly connected with clamp block 2, first sliding frame 3 upper part is provided with clamping mechanism 5, the top wall of chassis 4 is provided with fixing mechanism 6.

[0033] As shown in Figure 1 , Figure 2 , clamping mechanism 5 comprises first rotating frame 51, threaded rod 52 and fixed frame 53, the number of threaded rod 52 is two, two threaded rod 52 is respectively threadedly connected on the upper part of two first sliding frame 3, threaded rod 52 is through the similar first fixed rod 1, threaded rod 52 and first fixed rod 1 rotatingly connected, first fixed rod 1 outside is sleeved with fixed frame 53, first fixed rod 1 and fixed frame 53 slidingly connected, fixed frame 53 and chassis 4 are connected, threaded rod 52 outer end is connected with first rotating frame 51.

[0034] As shown in Figure 1 , Figure 3 , Figure 4 , fixing mechanism 6 comprises base 61, first fixed block 62, torsion spring 63 and limiting block 64, base 61 is welded on the top wall of chassis 4, the shape of base 61 is circular table, base 61 is located between two first fixed rod 1, base 61 in the middle of the through type opening has a circular hole, cantilever crane column is inserted into the circular hole on the base 61, the number of first fixed block 62 is two, two first fixed block 62 is respectively fixedly connected on the front and back of the top wall of base 61, first fixed block 62 is rotatably connected with limiting block 64, limiting block 64 is wound with torsion spring 63, the left and right sides of torsion spring 63 are respectively connected with first fixed block 62 and limiting block 64.

[0035] At the beginning, the distance between the two clamping blocks 2 is the adjustable maximum distance, when it is needed to reinforce the cantilever crane stand, before fixing the cantilever crane stand on the ground, people first turn the limiting block 64 outward, at this time the torsion spring 63 is twisted and deformed, then the cantilever crane stand is vertically inserted into the hole on the base 61, then the limiting block 64 is loosened, the elastic force of the torsion spring 63 makes the limiting block 64 clamp and fix the front and rear sides of the lower part of the cantilever crane stand, thereby reinforcing the cantilever crane stand, which is beneficial to enhance the stability of the cantilever crane stand, at this time the cantilever crane stand is located between the two clamping blocks 2, since the base 61 is in the shape of a circular truncated cone, the supporting surface of the cantilever crane stand and the ground is increased, which is beneficial to further enhance the stability of the cantilever crane stand, then the first rotating frame 51 is rotated, thereby driving the threaded rod 52 to rotate, then driving the first sliding frame 3 to slide inward, and then driving the clamping block 2 to move inward to contact the cantilever crane stand, thereby clamping the left and right sides of the lower part of the cantilever crane stand, which is beneficial to further reinforce the cantilever crane stand, when it is needed to take away the cantilever crane stand, the first rotating frame 51 is reversed, thereby driving the threaded rod 52 to reverse, then driving the first sliding frame 3 to slide outward, and then driving the clamping block 2 to move outward to disengage from the cantilever crane stand, then the limiting block 64 is turned outward, at this time the torsion spring 63 is twisted and deformed, then the cantilever crane stand is taken away, and the limiting block 64 is loosened, the resetting of the torsion spring 63 makes the limiting block 64 turn inward to the original position.

[0036] Example 2

[0037] On the basis of example 1, as shown in Figure 1 and Figure 5 It also includes an extrusion mechanism 7, the extrusion mechanism 7 includes a second rotating frame 71, a third rotating frame 72 and an extrusion block 73, the number of the third rotating frame 72 is two, the two third rotating frames 72 are respectively rotatably connected to the front and rear sides of the left clamping block 2, the number of the second rotating frame 71 is two, the two second rotating frames 71 are respectively rotatably connected to the front and rear sides of the right clamping block 2, the extrusion block 73 is rotatably connected between the front second rotating frame 71 and the third rotating frame 72, and the extrusion block 73 is also rotatably connected between the rear second rotating frame 71 and the third rotating frame 72, the inward movement of the extrusion block 73 can reinforce and clamp the front and rear sides of the lower part of the cantilever crane stand.

[0038] When the cantilever crane column is located between the clamping blocks 2, the cantilever crane column is located between the extrusion blocks 73, the clamping blocks 2 move inward to drive the second rotating frame 71 and the third rotating frame 72 to rotate inward to shrink, thereby driving the extrusion blocks 73 to move inward to contact the cantilever crane column, so that the front and rear extrusion blocks 73 reinforce and clamp the cantilever crane column on the front and rear sides, thereby further reinforcing the cantilever crane. When the clamping blocks 2 move outward, the clamping blocks 2 drive the second rotating frame 71 and the third rotating frame 72 to rotate outward to open, thereby driving the extrusion blocks 73 to move outward away from the cantilever crane column.

[0039] As shown in Figure 1 and Figure 6 , it further comprises a buffer mechanism 8, the buffer mechanism 8 comprises a second fixed rod 81, a second sliding frame 82, a first pressure spring 83 and a protrusion 84, the number of the second fixed rod 81 is two, the two second fixed rods 81 are respectively welded on the front and rear of the right side of the top wall of the base 61, the second fixed rod 81 is slidably connected with the second sliding frame 82 on the upper part, the protrusion 84 is fixedly connected between the top end of the second sliding frame 82, and the first pressure spring 83 is connected with the protrusion 84 on the top end of the second fixed rod 81.

[0040] Initially, the cantilever crane boom contacts the protrusion 84, and in the process of using the cantilever crane, the cantilever crane boom rotates, and when the cantilever crane boom rotates to gradually approach the protruding part of the protrusion 84, the cantilever crane boom extrudes the protrusion 84, so that the protrusion 84 moves downward, and the first pressure spring 83 is compressed. When the cantilever crane boom rotates away from the protruding part of the protrusion 84, the first pressure spring 83 rebounds to make the protrusion 84 move upward, so that the pressure on the cantilever crane boom can be buffered by the first pressure spring 83 and the protrusion 84, the pressure on the cantilever crane column can be dispersed, and the cantilever crane can be kept stable in the process of use. When the cantilever crane boom rotates away from the protrusion 84, the first pressure spring 83 resets to make the protrusion 84 slide upward to the original position.

[0041] As shown in Figure 1 and Figure 7As shown, further comprises adjusting mechanism 9, adjusting mechanism 9 comprises third sliding frame 91, third fixed rod 92, second pressure spring 93 and fourth sliding frame 94, fixed frame 53 are slidably provided with fourth sliding frame 94, third fixed rod 92 is fixedly connected in fourth sliding frame 94, third sliding frame 91 is slidably connected on third fixed rod, fixed frame 53 and first fixed rod 1 are slidably connected with third sliding frame 91, second pressure spring 93 is wound on third fixed rod 92, the inner and outer ends of second pressure spring 93 are connected with third sliding frame 91 and third fixed rod 92 respectively, three limiting holes 95 are opened from top to bottom in fixed frame 53, a limiting hole 95 is opened in the lower part of first fixed rod 1, a limiting hole 95 is opened in the lower part of first fixed rod 1, third sliding frame 91 can be inserted into limiting hole 95 by sliding.

[0042] Initially, third sliding frame 91 is inserted into the limiting hole 95 of first fixed rod 1, and third sliding frame 91 is inserted into one of the limiting holes 95 of fixed frame 53. Because the heights of different cantilever crane columns are different, it is necessary to adjust the height of clamp block 2 to meet the needs of reinforcing different cantilever crane columns. When it is necessary to adjust the height of clamp block 2, first pull third sliding frame 91 outward, so that third sliding frame 91 slides outward and separates from the limiting hole 95 on first fixed rod 1 and the limiting hole 95 on fixed frame 53. At this time, second pressure spring 93 is compressed, then pull first fixed rod 1 up and down, so that first fixed rod 1 slides up and down, thereby driving the limiting hole 95 on first fixed rod 1 to move up and down. First fixed rod 1 drives clamp block 2 to move up and down to the specified height through first sliding frame 3, thereby facilitating the reinforcement of different cantilever crane columns, and having strong applicability. When clamp block 2 moves up and down to the specified height, the limiting hole 95 of first fixed rod 1 is aligned with one of the limiting holes 95 on fixed frame 53, then pull fourth sliding frame 94 up and down, thereby driving third sliding frame 91 to move up and down to correspond to the limiting hole 95 of the specified height, then release third sliding frame 91, second pressure spring 93 resets third sliding frame 91 to slide inward and insert into the limiting hole 95 of fixed frame 53 at the specified height and the limiting hole 95 on first fixed rod 1, then release fourth sliding frame 94.

[0043] As Figure 1 and Figure 8The shown also includes a clamping mechanism 10, the clamping mechanism 10 includes a sliding bolt 101, a tension spring 102, a second fixed block 103, a first clamping block 104, a second clamping block 105 and a handle 106, the number of the second fixed block 103 is four, the four second fixed blocks 103 are evenly welded on the outer wall of the base 61 in the circumferential direction, the sliding bolt 101 is slidably connected in the second fixed block 103, the tension spring 102 is wound on the sliding bolt 101, the upper and lower ends of the tension spring 102 are connected with the sliding bolt 101 and the second fixed block 103 respectively, the number of the handle 106 is four, the four handles 106 are slidably connected on the base 61 in the circumferential direction, each sliding bolt 101 corresponds to a handle 106, the sliding bolt 101 can be inserted into the corresponding handle 106 by sliding downward, the first clamping block 104 is fixedly connected in the handle 106, the first clamping block 104 is located in the base 61, the number of the second clamping block 105 is four, the four second clamping blocks 105 are fixedly connected on the inner wall of the base 61 in the circumferential direction, the second clamping block 105 is staggered with the first clamping block 104.

[0044] At the beginning, the sliding bolt 101 is inserted in the handle 106, when it is needed to insert the cantilever crane stand into the base 61, people first pull the sliding bolt 101 upward, so that the sliding bolt 101 slides upward to separate from the handle 106, at this time the tension spring 102 is stretched, then pull the handle 106 outward, so as to drive the first clamping block 104 to move outward to retract in the base 61, then make the lower part of the cantilever crane stand correspond to the second clamping block 105, and insert the cantilever crane stand into the base 61, at this time the second clamping block 105 clamps the cantilever crane stand, then push the handle 106 inward, so as to drive the first clamping block 104 to move inward to contact with the lower part of the cantilever crane stand, which can fix the lower part of the cantilever crane stand, so as to further reinforce the cantilever crane stand, then release the sliding bolt 101, the tension spring 102 resets to make the sliding bolt 101 slide downward to insert into the handle 106, when it is needed to take away the cantilever crane stand, pull the sliding bolt 101 upward, so that the tension spring 102 is stretched, then pull the handle 106 outward, so as to drive the first clamping block 104 to move outward to separate from the cantilever crane stand, then continue to take away the cantilever crane stand, after the cantilever crane stand is taken away, push the handle 106 inward, so as to drive the first clamping block 104 to move inward to the original position, then release the sliding bolt 101, the tension spring 102 resets to make the sliding bolt 101 slide downward to insert into the handle 106.

[0045] The embodiments of the application are described in detail above with reference to the drawings, but the application is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the application.

Claims

1. A cantilever crane column reinforcing device, comprising a first fixed rod (1), a clamping block (2), a first sliding frame (3) and a chassis (4), the top wall of the chassis (4) is symmetrically clamped with the first fixed rod (1) on the left and right sides, the upper part of the first fixed rod (1) is slidably connected with the first sliding frame (3), the lower part of the first sliding frame (3) is in contact with the first fixed rod (1), and the upper part of the first sliding frame (3) is provided with the clamping block (2), characterized in that, It also includes clamping mechanism (5) and fixed mechanism (6), the first sliding frame (3) upper part is equipped with the clamping mechanism (5) for clamping the left and right sides of the lower part of the cantilever crane column, the top wall of the chassis (4) is provided with the fixed mechanism (6) for clamping the front and rear sides of the lower part of the cantilever crane column; The clamping mechanism (5) comprises a first rotating frame (51), a threaded rod (52) and a fixed frame (53), the upper part of the first sliding frame (3) is threadedly connected with the threaded rod (52), the threaded rod (52) penetrates through the adjacent first fixed rod (1), the threaded rod (52) is rotatably connected with the first fixed rod (1), the outer part of the first fixed rod (1) is sleeved with the fixed frame (53), the first fixed rod (1) is slidably connected with the fixed frame (53), the fixed frame (53) is connected with the chassis (4), and the outer end of the threaded rod (52) is connected with the first rotating frame (51). The fixed mechanism (6) comprises a base (61), a first fixed block (62), a torsion spring (63) and a limiting block (64), the top wall of the chassis (4) is provided with the base (61), the base (61) is located between the two first fixed rods (1), a circular hole is formed in the middle of the base (61), the cantilever crane column is vertically inserted into the circular hole on the base (61), the first fixed block (62) is mounted on the top wall of the base (61) and the top wall of the first fixed rod (1) on the front and rear sides, the first fixed block (62) is rotatably connected with the limiting block (64), the torsion spring (63) is wound on the limiting block (64), and the first fixed block (62) and the limiting block (64) are connected on the left and right sides of the torsion spring (63). It also includes a buffer mechanism (8) for buffering the pressure caused by the cantilever crane, the buffer mechanism (8) comprises a second fixed rod (81), a second sliding frame (82), a first pressure spring (83) and a protruding block (84), the second fixed rod (81) is symmetrically installed on the top wall of the base (61) on the right side, the second sliding frame (82) is slidably connected to the upper part of the second fixed rod (81), the protruding block (84) is connected between the top ends of the second sliding frames (82), and the first pressure spring (83) is connected to the top end of the second fixed rod (81).

2. A jib crane mast stabilizing device according to claim 1, characterized in that It also includes an extrusion mechanism (7) for reinforcing and clamping the front and rear sides of the lower part of the cantilever crane column, the extrusion mechanism (7) comprises a second rotating frame (71), a third rotating frame (72) and an extrusion block (73), the third rotating frame (72) is rotatably connected to the front and rear sides of the left clamping block (2), the second rotating frame (71) is rotatably connected to the front and rear sides of the right clamping block (2), the extrusion block (73) is rotatably connected between the second rotating frame (71) and the third rotating frame (72) on the front, and the extrusion block (73) is also rotatably connected between the second rotating frame (71) and the third rotating frame (72) on the rear.

3. A jib crane mast stabilizing device according to claim 2, characterized in that The adjusting mechanism (9) for reinforcing the different cantilever crane stands comprises a third sliding frame (91), a third fixed rod (92), a second pressure spring (93) and a fourth sliding frame (94), the fourth sliding frame (94) is slidably connected to the fixed frame (53), the third fixed rod (92) is connected to the fourth sliding frame (94), the third sliding frame (91) is slidably connected to the third fixed rod (92), the fixed frame (53) and the first fixed rod (1) are slidably connected to the third sliding frame (91), the second pressure spring (93) is wound on the third fixed rod (92), the inner and outer ends of the second pressure spring (93) are connected to the third sliding frame (91) and the third fixed rod (92) respectively, the fixed frame (53) is provided with a limiting hole (95) from top to bottom, the first fixed rod (1) is provided with a limiting hole (95) at the lower part, and the third sliding frame (91) is slid inward and inserted into the limiting hole (95) on the fixed frame (53) and the first fixed rod (1).

4. A jib crane mast stabilizing device according to claim 3, characterized in that The clamping mechanism (10) for clamping the lower part of the cantilever crane stand comprises a sliding bolt (101), a tension spring (102), a second fixed block (103), a first clamping block (104), a second clamping block (105) and a handle (106), the second fixed block (103) is uniformly installed on the outer wall of the base (61) in the circumferential direction, the sliding bolt (101) is slidably connected to the second fixed block (103) in the inner part, the tension spring (102) is wound on the sliding bolt (101), the upper and lower ends of the tension spring (102) are connected to the sliding bolt (101) and the second fixed block (103) respectively, the handle (106) is slidably connected to the base (61) in the circumferential direction, each sliding bolt (101) corresponds to a handle (106), the sliding bolt (101) is slid downward and inserted into the corresponding handle (106), the first clamping block (104) is installed in the inner part of the base (61), the second clamping block (105) is installed on the inner wall of the base (61) in the circumferential direction, and the second clamping block (105) is staggered with the first clamping block (104).

5. A jib crane mast stabilizing device according to claim 4, wherein, The base (61) is in the shape of a circular truncated cone.

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