Self-adjusting tower crane wall attaching rod

Abstract

The invention relates to the technical field of tower crane devices, in particular to a self-adjusting tower crane wall attaching rod. The self-adjusting tower crane wall attaching rod comprises a connecting pipe, two adjusting rods and two connecting mechanisms. Each connecting mechanism comprises an outer sleeve, an inner sleeve and a disc spring. When the inner sleeve and the outer sleeve get close to each other, the disc spring is compressed. And the disc springs enable the two adjusting rods to generate a trend of moving towards the middle part of the connecting pipe, so that initial pre-tightening force is provided for the adjusting rods. When the tower body generates lateral displacement due to a wind load or a hoisting effect, the adjusting rod can perform compliant movement under the buffering effect of the disc spring, so that external stress is dissipated, protection is provided for the adjusting rod and the connecting pipe, and the service life of the adjusting rod and the connecting pipe is remarkably prolonged. The invention provides a self-adjusting tower crane wall-attached rod to solve the problem that an existing wall-attached rod is prone to overload damage due to the fact that the length of the existing wall-attached rod is fixed and the existing wall-attached rod cannot effectively adapt to working condition changes.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tower crane devices, in particular to a self-adjusting tower crane wall-attached rod. BACKGROUND

[0002] The tower crane wall-attached rod is a key safety auxiliary component of the tower crane, and its essence is a set of rigid support rods connected between the tower body of the tower crane and the main structure of the building. In the construction of high-rise buildings, when the free end of the tower crane exceeds the design limit of its independent type, the stability and rigidity of the tower body will significantly decrease, and there is a risk of overturning. The core role of the wall-attached rod is to solve this problem: it forms a stable triangular or spatial support system by forcibly connecting the tower body with the solid building structure (such as the core tube, floor beam, etc.), thereby significantly reducing the slenderness ratio of the tower body, effectively transferring the horizontal loads such as wind load, torque and unbalanced bending moment borne by the tower crane to the building structure, and enhancing the overall rigidity and anti-overturning ability of the tower crane to ensure its safety and stability during over-height operation.

[0003] The patent application with publication number CN103979437A provides a tower crane wall-attached rod device, which adopts the mode of fixedly connecting an ear plate to a steel pipe cylinder and then fixedly connecting the wall-attached rod to the ear plate through a connecting plate to realize reliable attachment of the rod to the cylindrical structure. However, since the length of the wall-attached rod is fixed, it needs to be accurately measured and calculated during installation, and once the building structure undergoes slight deformation or settlement during the construction process, the rod may bear unpredictable additional stress, the rod is prone to damage, and there is a safety hazard. SUMMARY

[0004] The present application provides a self-adjusting tower crane wall-attached rod to solve the problem that the existing wall-attached rod is prone to overload damage due to the fixed length and the inability to effectively adapt to changes in working conditions.

[0005] The self-adjusting tower crane wall-attached rod of the present application adopts the following technical solution: a self-adjusting tower crane wall-attached rod includes a connecting pipe, two adjusting rods, two connecting mechanisms and two adjusting mechanisms. The two adjusting rods are located at the two ends of the connecting pipe, and one end of each adjusting rod extends into the connecting pipe.

[0006] The two connecting mechanisms are respectively at the two ends of the connecting pipe, and each connecting mechanism includes an outer sleeve pipe, an inner sleeve pipe, a disc spring, a first transmission assembly and a second transmission assembly. The outer sleeve pipe and the inner sleeve pipe are coaxially arranged with the connecting pipe and located inside the connecting pipe, and are sleeved on the adjusting rod. The outer sleeve pipe and the inner sleeve pipe can rotate and slide along the axial direction of the connecting pipe. The inner sleeve pipe is located on the side of the outer sleeve pipe close to the middle of the connecting pipe. The disc spring is between the outer sleeve pipe and the inner sleeve pipe.

[0007] The connecting mechanism has a first working stage and a second working stage. In the first working stage, the inner sleeve moves away from the middle of the connecting pipe, and the outer sleeve remains stationary. When the inner sleeve moves towards the middle of the connecting pipe, the first transmission assembly drives the outer sleeve to move in the same direction as the inner sleeve and the distance between the two increases. In the second working stage, when the inner sleeve moves away from the middle of the connecting pipe, the second transmission assembly drives the outer sleeve to move in the same direction as the inner sleeve and the distance between the two decreases. When the inner sleeve moves towards the middle of the connecting pipe, the outer sleeve remains stationary.

[0008] The adjusting mechanism controls the cooperation of the first transmission assembly or the second transmission assembly with the outer sleeve to realize the mutual conversion of the first working stage and the second working stage.

[0009] Further, a first threaded groove is formed on the outer wall of the outer sleeve and is threadedly connected with the connecting pipe. A second threaded groove is formed on the inner wall of the inner sleeve and is threadedly connected with the adjusting rod, and the pitch of the second threaded groove is greater than that of the first threaded groove.

[0010] The rotation directions of the first threaded groove and the second threaded groove are configured such that when the inner sleeve and the outer sleeve rotate in the forward direction, they both move towards the end of the connecting pipe, and when they rotate in the reverse direction, they both move towards the middle of the connecting pipe.

[0011] Further, a plurality of ratchet teeth are arranged on the inner wall of the outer sleeve. The first transmission assembly and the second transmission assembly each include a sliding block, a pawl, and a spring. The sliding block is arranged on the inner sleeve in a sliding manner along the radial direction of the inner sleeve. The pawl is arranged on the sliding block in a rotating manner, and the first spring connects the sliding block and the pawl. The pawl is arranged in an inclined manner, and the inclined directions of the pawls of the first transmission assembly and the second transmission assembly are opposite. The pawl is used to engage with the ratchet teeth. The pawl on the first transmission assembly drives the outer sleeve to rotate in the reverse direction when the inner sleeve rotates in the reverse direction. The pawl on the second transmission assembly drives the outer sleeve to rotate in the forward direction when the inner sleeve rotates in the forward direction.

[0012] Further, a first oil cavity and a second oil cavity are formed in the inner sleeve. The sliding block in the first transmission assembly is arranged in the first oil cavity in a sliding manner, and the sliding block in the second transmission assembly is arranged in the second oil cavity in a sliding manner.

[0013] The inner sleeve is provided with a hydraulic cavity, a first oil path, and a second oil path. Each adjusting mechanism includes an adjusting block arranged in the hydraulic cavity in a sliding manner along the axial direction of the inner sleeve, and the adjusting block divides the hydraulic cavity into a third oil cavity and a fourth oil cavity. The first oil path connects the first oil cavity and the fourth oil cavity, and the second oil path connects the second oil cavity and the third oil cavity.

[0014] When the adjusting block moves towards the outer sleeve, the space of the fourth oil cavity increases, which drives the sliding block in the first transmission assembly to move towards the axis of the inner sleeve, and then the pawl and the ratchet tooth in the first transmission assembly disengage. The space of the third oil cavity decreases, which drives the sliding block in the second transmission assembly to move away from the axis of the inner sleeve, and then the pawl and the ratchet tooth in the second transmission assembly engage.

[0015] Further, each adjusting mechanism further comprises a first limiting ring and a second limiting ring, both of which are fixedly arranged on the adjusting rod and coaxially arranged with the adjusting rod. The first limiting ring and the second limiting ring are sequentially distributed along the direction from the end of the connecting pipe to the middle of the connecting pipe.

[0016] The adjusting block is fixedly arranged with a first connecting rod and a second connecting rod on both sides of the axis of the inner sleeve, the first connecting rod is used for abutting against the first limiting ring, and the second connecting rod is used for abutting against the second limiting ring.

[0017] Further, the outer sleeve and the inner sleeve are both provided with a clean oil cavity and a contaminated oil cavity, and a filter membrane is arranged between the clean oil cavity and the contaminated oil cavity.

[0018] The side of the outer sleeve in contact with the connecting pipe is provided with a first oil storage groove, and the first oil storage groove is in communication with the first threaded groove. The second oil storage groove is formed between the outer sleeve and the adjusting rod. The clean oil cavity in the outer sleeve is in communication with the first oil storage groove and the second oil storage groove, and the contaminated oil cavity in the outer sleeve is in communication with the first oil storage groove and the second oil storage groove.

[0019] The side of the inner sleeve in contact with the connecting pipe is provided with a third oil storage groove. The side of the inner sleeve close to the adjusting rod is provided with a fourth oil storage groove, and the fourth oil storage groove is in communication with the second threaded groove. The clean oil cavity in the inner sleeve is in communication with the third oil storage groove and the fourth oil storage groove, and the contaminated oil cavity in the inner sleeve is in communication with the third oil storage groove and the fourth oil storage groove.

[0020] Further, each clean oil cavity is provided with an oil outlet check valve, and the oil outlet check valve allows the hydraulic oil in the clean oil cavity to flow outwards. Each contaminated oil cavity is provided with an oil return check valve, and the oil return check valve allows the hydraulic oil from the outside to flow into the contaminated oil cavity.

[0021] Further, each connecting mechanism further comprises two lubricating assemblies, and the two lubricating assemblies are respectively arranged in the inner sleeve and the outer sleeve. Each lubricating assembly comprises a sliding ring and a second spring. The sliding ring is arranged along the axis of the connecting pipe, and one side of the sliding ring is arranged in the clean oil cavity along the axis of the connecting pipe, and the other side abuts against the disc spring. The second spring in the inner sleeve connects the sliding ring and the inner sleeve, and the second spring in the outer sleeve connects the sliding ring and the outer sleeve.

[0022] Further, the outer sleeve is provided with a worm wheel fixed on the outer peripheral wall of the inner sleeve. Each connecting mechanism further comprises a driving assembly, which comprises a mounting box and a worm. The mounting box is slidably arranged on the connecting pipe along the axial direction of the connecting pipe. The worm is rotatably arranged in the mounting box, and the worm is arranged along the tangential direction of the inner sleeve and is engaged with the worm wheel.

[0023] Further, the outer sleeve is provided with a first annular groove near one end of the inner sleeve, and the inner sleeve is provided with a second annular groove near one end of the outer sleeve. One end of the outer sleeve is slidably arranged in the second annular groove. The first annular groove and the second annular groove are in communication, one end of the disc spring is in the first annular groove, and the other end of the disc spring is in the second annular groove.

[0024] The self-adjusting tower crane wall-attached rod provided by the present application has the following beneficial effects: when the inner sleeve and the outer sleeve are close to each other, the disc spring is compressed through the connecting mechanism. The disc spring makes the two adjusting rods have a tendency to move to the middle part of the connecting pipe, thereby providing initial pre-tightening force for the adjusting rods. When the tower body is laterally displaced due to wind load or lifting action, the buffering effect of the disc spring enables the adjusting rods to move adaptively, thereby dissipating external stress, protecting the adjusting rods and the connecting pipe, and significantly prolonging the service life. More importantly, this automatic compensation mechanism fundamentally avoids deformation accumulation and eliminates the need for manual readjustment, thereby improving daily work efficiency and reducing long-term maintenance costs and safety risks.

[0025] When the connecting mechanism is in the first working stage, the outer sleeve continuously moves towards the middle part of the connecting pipe, which causes the initial positions of the outer sleeve and the inner sleeve to change continuously. When the connecting mechanism is in the second working stage, the outer sleeve continuously moves away from the middle part of the connecting pipe. During the process of continuously converting the first working stage and the second working stage of the connecting mechanism by the adjusting mechanism, the initial positions of the outer sleeve and the inner sleeve change periodically, and the contact stress area between the inner sleeve and the adjusting rods is actively and orderly transferred. This mechanism fundamentally avoids the generation of local "peak wear", ensures uniform wear of the connecting pipe and the adjusting rods throughout the cycle and the whole stroke, thereby maximizing the comprehensive service life and bringing considerable economic and safety improvements. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0027] Figure 1 The structure of the self-adjusting tower crane wall-attached rod provided by the present application is shown in the structure diagram. Figure 2 is Figure 1 an enlarged view of A in the middle; Figure 3 an exploded view of a self-adjusting tower crane wall-attached rod provided by an embodiment of the present application; Figure 4 a sectional view of an outer sleeve and an inner sleeve of a self-adjusting tower crane wall-attached rod provided by an embodiment of the present application; Figure 5 a structural schematic view of an outer sleeve and an inner sleeve of a self-adjusting tower crane wall-attached rod provided by an embodiment of the present application; Figure 6 a structural schematic view of a driving assembly of a self-adjusting tower crane wall-attached rod provided by an embodiment of the present application; Figure 7 a side view of a self-adjusting tower crane wall-attached rod provided by an embodiment of the present application; Figure 8 is Figure 7 a sectional view of B-B; Figure 9 is Figure 8 an enlarged view of D in the middle; Figure 10 is Figure 9 an enlarged view of E in the middle; Figure 11 is Figure 7 a sectional view of C-C; Figure 12 is Figure 11 an enlarged view of F in the middle; Figure 13 a sectional view of a self-adjusting tower crane wall-attached rod provided by an embodiment of the present application; Figure 14 is Figure 13 an enlarged view of G in the middle.

[0028] In the figure: 110, connecting pipe; 112, mounting ring; 120, adjusting rod; 124, second limiting ring; 125, first limiting ring; 130, mounting box; 134, rotating handle; 140, outer sleeve; 141, clean oil cavity; 142, contaminated oil cavity; 143, oil return one-way valve; 144, oil outlet one-way valve; 145, sliding ring; 146, second spring; 148, ratchet tooth; 150, inner sleeve; 151, worm wheel; 155, worm; 159, hydraulic cavity; 1591, first oil path; 160, disc spring; 171, sliding block; 172, pawl; 173, first spring; 180, adjusting block; 190, first oil storage groove; 200, second oil storage groove; 201, third oil storage groove; 202, first ring groove; 203, second ring groove; 204, fourth oil storage groove. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0030] Referring to Figures 1 to 14 As shown in the figure, the self-adjusting wall-attached rod of a tower crane provided by the embodiments of the present application comprises a connecting pipe 110, two adjusting rods 120, two connecting mechanisms and two adjusting mechanisms. The two adjusting rods 120 are respectively located at two ends of the connecting pipe 110, and one end of the adjusting rod 120 extends into the connecting pipe 110.

[0031] The two connecting mechanisms are respectively located at the two ends of the connecting pipe 110, and each connecting mechanism comprises an outer sleeve pipe 140, an inner sleeve pipe 150, a disc spring 160, a first transmission assembly and a second transmission assembly. The outer sleeve pipe 140 and the inner sleeve pipe 150 are coaxially arranged with the connecting pipe 110 and are located in the connecting pipe 110, and are sleeved on the adjusting rod 120. The outer sleeve pipe 140 and the inner sleeve pipe 150 can rotate and can slide along the axial direction of the connecting pipe 110. The inner sleeve pipe 150 is located at the side of the outer sleeve pipe 140 close to the middle part of the connecting pipe 110. The disc spring 160 is located between the outer sleeve pipe 140 and the inner sleeve pipe 150.

[0032] The connecting mechanism has a first working stage and a second working stage. In the first working stage, when the inner sleeve pipe 150 moves away from the middle part of the connecting pipe 110, the outer sleeve pipe 140 remains stationary. When the inner sleeve pipe 150 moves close to the middle part of the connecting pipe 110, the first transmission assembly drives the outer sleeve pipe 140 and the inner sleeve pipe 150 to move in the same direction and the distance between them increases.

[0033] In the second working stage, when the inner sleeve pipe 150 moves away from the middle part of the connecting pipe 110, the second transmission assembly drives the outer sleeve pipe 140 and the inner sleeve pipe 150 to move in the same direction and the distance between them decreases. When the inner sleeve pipe 150 moves close to the middle part of the connecting pipe 110, the outer sleeve pipe 140 remains stationary. The adjusting mechanism controls the cooperation of the first transmission assembly or the second transmission assembly with the outer sleeve pipe 140 to realize the mutual conversion of the first working stage and the second working stage.

[0034] When the inner sleeve 150 and the outer sleeve 140 are close to each other, the disc spring 160 is compressed. The disc spring 160 makes the two adjusting rods 120 tend to move towards the middle of the connecting pipe 110, thereby providing the adjusting rods 120 with an initial pre-tightening force. When the tower body is laterally displaced due to wind load or hoisting action, the cushioning effect of the disc spring 160 enables the adjusting rods 120 to move adaptively, thereby dissipating external stress, protecting the adjusting rods 120 and the connecting pipe 110, and significantly prolonging the service life thereof. More importantly, this automatic compensation mechanism fundamentally avoids deformation accumulation, thereby achieving the operation of eliminating manual readjustment, improving daily work efficiency, and reducing long-term maintenance cost and safety risk.

[0035] When the connecting mechanism is in the first working stage, the outer sleeve 140 continuously moves towards the middle of the connecting pipe 110, causing the initial positions of the outer sleeve 140 and the inner sleeve 150 to change continuously. When the connecting mechanism is in the second working stage, the outer sleeve 140 continuously moves away from the middle of the connecting pipe 110. During the process in which the adjusting mechanism enables the first working stage and the second working stage of the connecting mechanism to change continuously, the initial positions of the outer sleeve 140 and the inner sleeve 150 change periodically, and the contact stress area between the inner sleeve 150 and the adjusting rods 120 is actively and orderly transferred. This mechanism fundamentally avoids the generation of local “peak wear”, ensures uniform wear of the connecting pipe 110 and the adjusting rods 120 throughout the cycle and the entire stroke, thereby maximizing the comprehensive service life thereof and bringing about considerable economic and safety improvement.

[0036] In the embodiment, a first threaded groove is formed on the outer wall of the outer sleeve 140 and is threadedly matched with the connecting pipe 110 through the first threaded groove. A second threaded groove is formed on the inner wall of the inner sleeve 150 and is threadedly matched with the adjusting rods 120 through the second threaded groove, and the pitch of the second threaded groove is greater than that of the first threaded groove. The rotation directions of the first threaded groove and the second threaded groove are configured such that, when the inner sleeve 150 and the outer sleeve 140 rotate forward, they both move towards the end of the connecting pipe 110, and when they rotate reversely, they both move towards the middle of the connecting pipe 110.

[0037] When the inner sleeve 150 and the outer sleeve 140 both rotate forward, due to the fact that the pitch of the second threaded groove is greater than that of the first threaded groove, the moving speed of the inner sleeve 150 is greater than that of the outer sleeve 140, and the distance between the inner sleeve 150 and the outer sleeve 140 gradually increases. When the inner sleeve 150 and the outer sleeve 140 both rotate reversely, the distance between the inner sleeve 150 and the outer sleeve 140 gradually decreases.

[0038] In the embodiment, a plurality of ratchet teeth 148 are arranged on the inner wall of the outer sleeve 140, the plurality of ratchet teeth 148 are distributed along the circumferential direction of the outer sleeve 140, and each ratchet tooth 148 is arranged along the axial direction of the outer sleeve 140.

[0039] The first transmission assembly and the second transmission assembly each include a sliding block 171, a pawl 172 and a first spring 173. The sliding block 171 is arranged on the inner sleeve 150 in a radial sliding manner. The pawl 172 is arranged on the sliding block 171 in a rotating manner, and the first spring 173 connects the sliding block 171 and the pawl 172. The pawl 172 is arranged in an inclined manner, and the inclined directions of the pawls 172 of the first transmission assembly and the second transmission assembly are opposite. The pawl 172 is used to engage with the ratchet teeth 148. The pawl 172 on the first transmission assembly drives the outer sleeve 140 to rotate reversely when the inner sleeve 150 rotates reversely. The pawl 172 on the second transmission assembly drives the outer sleeve 140 to rotate forwardly when the inner sleeve 150 rotates forwardly.

[0040] In the embodiment, the first oil cavity and the second oil cavity are arranged in the inner sleeve 150. The sliding block 171 in the first transmission assembly is arranged in the first oil cavity in a sliding manner, and the sliding block 171 in the second transmission assembly is arranged in the second oil cavity in a sliding manner.

[0041] The hydraulic cavity 159, the first oil path 1591 and the second oil path are arranged in the inner sleeve 150. Each adjusting mechanism includes an adjusting block 180 arranged in the hydraulic cavity 159 in an axial sliding manner. The adjusting block 180 divides the hydraulic cavity 159 into a third oil cavity and a fourth oil cavity. The third oil cavity and the fourth oil cavity are arranged in sequence along the direction from the end of the connecting pipe 110 to the middle of the connecting pipe 110. The first oil path 1591 connects the first oil cavity and the fourth oil cavity, and the second oil path connects the second oil cavity and the third oil cavity.

[0042] When the adjusting block 180 moves relative to the inner sleeve 150 towards the outer sleeve 140, the space of the fourth oil cavity increases, which drives the sliding block 171 in the first transmission assembly to move close to the axis of the inner sleeve 150, and then the pawl 172 in the first transmission assembly disengages from the ratchet teeth 148. The space of the third oil cavity decreases, which drives the sliding block 171 in the second transmission assembly to move away from the axis of the inner sleeve 150, and then the pawl 172 in the second transmission assembly engages with the ratchet teeth 148.

[0043] In the embodiment, each adjusting mechanism further includes a first limiting ring 125 and a second limiting ring 124. The first limiting ring 125 and the second limiting ring 124 are fixedly arranged on the adjusting rod 120 and coaxially arranged with the adjusting rod 120. The first limiting ring 125 and the second limiting ring 124 are arranged in sequence along the direction from the end of the connecting pipe 110 to the middle of the connecting pipe 110.

[0044] The adjusting block 180 is fixedly provided with a first connecting rod and a second connecting rod on both sides of the inner sleeve 150 along the axial direction, and the first connecting rod and the second connecting rod are arranged along the axial direction of the inner sleeve 150. The first connecting rod is used for abutting against the first limiting ring 125, and the second connecting rod is used for abutting against the second limiting ring 124.

[0045] In the embodiment, the outer sleeve 140 and the inner sleeve 150 are both provided with clean oil cavities 141 and contaminated oil cavities 142, and the clean oil cavities 141 and the contaminated oil cavities 142 are sequentially arranged along the direction gradually away from the middle part of the connecting pipe 110. The filter membrane is arranged between the clean oil cavities 141 and the contaminated oil cavities 142.

[0046] The side of the outer sleeve 140 in contact with the connecting pipe 110 is provided with a first oil storage groove 190, and the first oil storage groove 190 is in communication with the first threaded groove. The second oil storage groove 200 is formed between the outer sleeve 140 and the adjusting rod 120. The clean oil cavities 141 in the outer sleeve 140 are in communication with the first oil storage groove 190 and the second oil storage groove 200, and the contaminated oil cavities 142 in the outer sleeve 140 are in communication with the first oil storage groove 190 and the second oil storage groove 200.

[0047] The side of the inner sleeve 150 in contact with the connecting pipe 110 is provided with a third oil storage groove 201. The side of the inner sleeve 150 close to the adjusting rod 120 is provided with a fourth oil storage groove 204, and the fourth oil storage groove 204 is in communication with the second threaded groove. The clean oil cavities 141 in the inner sleeve 150 are in communication with the third oil storage groove 201 and the fourth oil storage groove 204, and the contaminated oil cavities 142 in the inner sleeve 150 are in communication with the third oil storage groove 201 and the fourth oil storage groove 204.

[0048] In the embodiment, two oil outlet one-way valves 144 are arranged in each clean oil cavity 141, and the oil outlet one-way valves 144 allow the hydraulic oil in the clean oil cavities 141 to flow outwards. The oil outlet one-way valves 144 in the outer sleeve 140 allow the hydraulic oil in the clean oil cavities 141 to flow to the first oil storage groove 190 and the second oil storage groove 200. The oil outlet one-way valves 144 of the inner sleeve 150 allow the hydraulic oil in the clean oil cavities 141 to flow to the third oil storage groove 201 and the fourth oil storage groove 204.

[0049] Two oil return one-way valves 143 are arranged in each contaminated oil cavity 142, and the oil return one-way valves 143 allow the hydraulic oil from the outside to flow into the contaminated oil cavities 142. The oil return one-way valves 143 in the outer sleeve 140 allow the hydraulic oil in the first oil storage groove 190 and the second oil storage groove 200 to flow into the contaminated oil cavities 142, and the oil return one-way valves 143 of the inner sleeve 150 allow the hydraulic oil in the third oil storage groove 201 and the fourth oil storage groove 204 to flow into the contaminated oil cavities 142.

[0050] In the embodiment, each connecting mechanism further comprises two lubricating assemblies, which are respectively arranged in the inner sleeve 150 and the outer sleeve 140. Each lubricating assembly comprises a sliding ring 145 and a second spring 146. The sliding ring 145 is arranged along the axial direction of the connecting pipe 110, and one side of the sliding ring 145 along the axial direction of the connecting pipe 110 is arranged in the clean oil cavity 141, and the other side of the sliding ring 145 is arranged in abutment with the disc spring 160. The second spring 146 arranged in the inner sleeve 150 connects the sliding ring 145 and the inner sleeve 150, and the second spring 146 arranged in the outer sleeve 140 connects the sliding ring 145 and the outer sleeve 140. During the process that the outer sleeve 140 and the inner sleeve 150 approach each other, the disc spring 160 is compressed, and the two sliding rings 145 are pushed to move into the clean oil cavity 141, so that the hydraulic oil in the clean oil cavity 141 is discharged outward. During the process that the outer sleeve 140 and the inner sleeve 150 move away from each other, the second spring 146 pushes the two sliding rings 145 to move out of the clean oil cavity 141.

[0051] In the embodiment, the outer peripheral wall of the inner sleeve 150 is fixedly provided with a worm wheel 151, and the worm wheel 151 is coaxially arranged with the inner sleeve 150. Each connecting mechanism further comprises a driving assembly, which comprises a mounting box 130 and a worm 155. The mounting box 130 is slidably arranged on the connecting pipe 110 along the axial direction of the connecting pipe 110. The worm 155 is rotatably arranged in the mounting box 130, and the worm 155 is arranged along the tangential direction of the inner sleeve 150 and is in mesh with the worm wheel 151. One end of the worm 155 is fixedly provided with a rotating handle 134, and the rotating handle 134 is arranged along the radial direction of the worm 155, so as to facilitate the rotation of the rotating handle 134. The mounting box 130 is provided with a counter, which is used to record the number of rotations of the worm 155.

[0052] In the embodiment, the end of the outer sleeve 140 close to the inner sleeve 150 is provided with a first annular groove 202, the end of the inner sleeve 150 close to the outer sleeve 140 is provided with a second annular groove 203, and the end of the outer sleeve 140 is slidably arranged in the second annular groove 203. The first annular groove 202 and the second annular groove 203 are communicated, one end of the disc spring 160 is arranged in the first annular groove 202, and the other end of the disc spring 160 is arranged in the second annular groove 203. The two ends of the connecting pipe 110 are provided with mounting rings 112, and the mounting rings 112 are threadedly connected with the connecting pipe 110, so as to limit the outer sleeve 140 and the inner sleeve 150 from being pulled out of the connecting pipe 110.

[0053] Working process: in the initial state, the disc spring 160 is at the original length.

[0054] When installing, one of the adjusting rods 120 is fixedly connected with the tower body, and the other adjusting rod 120 is connected with the wall. When working, the adjusting mechanism is first in the first working stage, at which time the pawl 172 in the first transmission assembly and the ratchet teeth 148 are engaged. Rotating the rotating handle 134 drives the worm 155 to rotate, and the worm 155 drives the inner sleeve 150 to rotate in the positive direction through the worm gear 151, so that the inner sleeve 150 moves away from the middle part of the connecting pipe 110, at which time the outer sleeve 140 does not rotate.

[0055] As the inner sleeve 150 and the outer sleeve 140 approach each other, the disc spring 160 is compressed. The disc spring 160 makes the two adjusting rods 120 tend to move towards the middle part of the connecting pipe 110, thereby providing the adjusting rods 120 with initial pre-tightening force.

[0056] When the tower body is laterally displaced due to wind load or hoisting action, the cushioning effect of the disc spring 160 enables the adjusting rods 120 to move adaptively, thereby dissipating external stress, protecting the adjusting rods 120 and the connecting pipe 110, and significantly prolonging the service life thereof. More importantly, this automatic compensation mechanism fundamentally avoids deformation accumulation, realizes the operation of eliminating manual readjustment, improves daily work efficiency, and reduces long-term maintenance cost and safety risk.

[0057] When disassembling, the inner sleeve 150 is driven to rotate in the reverse direction through the worm gear 151. Under the action of the first transmission assembly, the inner sleeve 150 drives the outer sleeve 140 to synchronously rotate in the reverse direction. When the outer sleeve 140 rotates in the reverse direction, it moves towards the middle part of the connecting pipe 110. Since the pitch of the second threaded groove is greater than that of the first threaded groove, the moving speed of the inner sleeve 150 is greater than that of the outer sleeve 140, the distance between the two gradually increases, until the initial position is restored, and the disc spring 160 returns to the original length. At this time, the disc spring 160 has no force on the inner sleeve 150 and the outer sleeve 140, facilitating the disassembly of the adjusting rods 120 from the connecting pipe 110.

[0058] After multiple installations and disassemblies, the outer sleeve 140 continuously moves towards the middle part of the connecting pipe 110, resulting in a change in the initial position of the outer sleeve 140 and the inner sleeve 150. When the second connecting rod and the second limiting ring 124 abut, the second connecting rod pushes the sliding block 171 to move relative to the inner sleeve 150, so that the space of the fourth oil chamber increases, the space of the first oil chamber decreases through the first oil path 1591, and then the sliding block 171 in the first transmission assembly moves towards the axis of the inner sleeve 150, and the pawl 172 in the first transmission assembly and the ratchet teeth 148 are disengaged. At the same time, the space in the third oil chamber decreases, the space in the second oil chamber increases through the second oil path, the sliding block 171 in the second transmission assembly moves away from the axis of the inner sleeve 150, and the pawl 172 in the second transmission assembly and the ratchet teeth 148 are engaged. At this time, the connecting mechanism is in the second working stage.

[0059] Subsequently, when the inner sleeve 150 rotates forward again, the outer sleeve 140 is driven to rotate forward synchronously by the second transmission assembly, and the distance between the inner sleeve 150 and the outer sleeve 140 gradually decreases. When the inner sleeve 150 rotates reversely, the outer sleeve 140 remains stationary, and the distance between the inner sleeve 150 and the outer sleeve 140 gradually increases. After multiple installation and disassembly, the outer sleeve 140 continuously moves away from the middle of the connecting pipe 110, and the initial position of the outer sleeve 140 and the inner sleeve 150 continues to change.

[0060] When the first connecting rod and the first limiting ring 125 abut, the connecting mechanism is changed from the second working stage to the first working stage. The periodic change of the initial position of the outer sleeve 140 and the inner sleeve 150 actively and orderly transfers the contact stress area of the inner sleeve 150 and the adjusting rod 120. This mechanism fundamentally avoids the generation of local "peak wear", ensures the uniform wear of the connecting pipe 110 and the adjusting rod 120 in the whole cycle and the whole stroke, thereby maximizing the comprehensive service life and bringing considerable economic and safety improvement.

[0061] In the process of the outer sleeve 140 and the inner sleeve 150 approaching each other, the disc spring 160 is compressed, pushing the two sliding rings 145 to move into the clean oil chamber 141, so that the hydraulic oil in the clean oil chamber 141 is discharged outward, and the two second springs 146 are compressed.

[0062] The hydraulic oil in the clean oil chamber 141 of the outer sleeve 140 flows to the first oil storage groove 190 and the second oil storage groove 200 through the oil outlet check valve 144, lubricating the contact surfaces between the outer sleeve 140 and the connecting pipe 110 and between the outer sleeve 140 and the adjusting rod 120. The hydraulic oil in the clean oil chamber 141 of the inner sleeve 150 flows to the third oil storage groove 201 and the fourth oil storage groove 204 through the oil outlet check valve 144, lubricating the contact surfaces between the inner sleeve 150 and the connecting pipe 110 and between the outer sleeve 140 and the adjusting rod 120.

[0063] In the process of the outer sleeve 140 and the inner sleeve 150 moving away from each other, the second spring 146 pushes the two sliding rings 145 to move out of the clean oil chamber 141, so that the space of the clean oil chamber 141 increases, and the hydraulic oil in the contaminated oil chamber 142 is sucked into the clean oil chamber 141 through the filter membrane. The contaminated oil chamber 142 of the outer sleeve 140 sucks back the hydraulic oil in the first oil storage groove 190 and the second oil storage groove 200, and the contaminated oil chamber 142 of the inner sleeve 150 sucks back the hydraulic oil in the third oil storage groove 201 and the fourth oil storage groove 204.

[0064] Therefore, during the movement of the outer sleeve 140 and the inner sleeve 150, the clean oil cavity 141 constantly replenishes hydraulic oil, reducing the friction between the outer sleeve 140, the inner sleeve 150 and the connecting pipe 110 and the adjusting rod 120. The contaminated oil cavity 142 recovers excess hydraulic oil and, after filtering through a filter membrane, enters the clean oil cavity 141, thereby reducing the possibility of the surface sludge of the adjusting rod 120 entering the threaded surface and improving the threaded fitting precision.

[0065] The wear and lubrication degree of each part of the connecting pipe 110 and the adjusting rod 120 tend to be consistent, so that no obvious operation resistance is generated during the disassembly process, which helps to improve the installation and disassembly efficiency.

[0066] The above only describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A self-adjusting tower crane wall-attached rod, characterized in that: comprising a connecting pipe, two adjusting rods, two connecting mechanisms and two adjusting mechanisms; the two adjusting rods are respectively located at the two ends of the connecting pipe, and one end of each adjusting rod extends into the connecting pipe; the two connecting mechanisms are respectively located at the two ends of the connecting pipe, each connecting mechanism comprising an outer sleeve, an inner sleeve, a disc spring, a first transmission assembly and a second transmission assembly; the outer sleeve and the inner sleeve are coaxially arranged in the connecting pipe and located in the connecting pipe, and are sleeved on the adjusting rod; the outer sleeve and the inner sleeve can rotate and slide along the axial direction of the connecting pipe; the inner sleeve is located on the side of the outer sleeve close to the middle of the connecting pipe; the disc spring is located between the outer sleeve and the inner sleeve; the connecting mechanism has a first working stage and a second working stage; in the first working stage, when the inner sleeve moves away from the middle of the connecting pipe, the outer sleeve remains stationary; when the inner sleeve moves towards the middle of the connecting pipe, the first transmission assembly drives the outer sleeve and the inner sleeve to move in the same direction and the distance between them increases; in the second working stage, when the inner sleeve moves away from the middle of the connecting pipe, the second transmission assembly drives the outer sleeve and the inner sleeve to move in the same direction and the distance between them decreases; when the inner sleeve moves towards the middle of the connecting pipe, the outer sleeve remains stationary; the adjusting mechanism controls the cooperation of the first transmission assembly or the second transmission assembly with the outer sleeve to realize the mutual conversion of the first working stage and the second working stage. 2.The self-adjusting tower crane wall-attached rod according to claim 1, characterized in that: a first threaded groove is formed on the outer wall of the outer sleeve and is threadedly connected with the connecting pipe; a second threaded groove is formed on the inner wall of the inner sleeve and is threadedly connected with the adjusting rod, and the pitch of the second threaded groove is greater than that of the first threaded groove; the rotation directions of the first threaded groove and the second threaded groove are configured such that when the inner sleeve and the outer sleeve rotate in the forward direction, they both move towards the end of the connecting pipe, and when they rotate in the reverse direction, they both move towards the middle of the connecting pipe. 3.The self-adjusting tower crane wall-attached rod according to claim 1, characterized in that: a plurality of ratchet teeth are arranged on the inner wall of the outer sleeve; the first transmission assembly and the second transmission assembly each comprise a sliding block, a pawl and a spring; the sliding block is arranged on the inner sleeve and can slide in the radial direction of the inner sleeve; the pawl is arranged on the sliding block and can rotate, and the first spring connects the sliding block and the pawl; the pawl is arranged obliquely, and the oblique directions of the pawls of the first transmission assembly and the second transmission assembly are opposite; the pawl is used to engage with the ratchet teeth; the pawl on the first transmission assembly drives the outer sleeve to rotate in the reverse direction when the inner sleeve rotates in the reverse direction; the pawl on the second transmission assembly drives the outer sleeve to rotate in the forward direction when the inner sleeve rotates in the forward direction. 4.The self-adjusting tower crane wall-attached rod according to claim 3, characterized in that: a first oil cavity and a second oil cavity are formed in the inner sleeve, the sliding block in the first transmission assembly is arranged in the first oil cavity and can slide, and the sliding block in the second transmission assembly is arranged in the second oil cavity and can slide. ​ ​ ​ ​ ​ ​ ​ ​ The inner sleeve is provided with a hydraulic cavity, a first oil path and a second oil path; each adjusting mechanism comprises an adjusting block which is arranged in the hydraulic cavity in a sliding manner along the axial direction of the inner sleeve, and the adjusting block divides the hydraulic cavity into a third oil cavity and a fourth oil cavity; the first oil path connects the first oil cavity and the fourth oil cavity, and the second oil path connects the second oil cavity and the third oil cavity; When the adjusting block moves relative to the inner sleeve in a direction close to the outer sleeve, the space of the fourth oil cavity is increased, the sliding block in the first transmission assembly is driven to move close to the axial center of the inner sleeve, and then the pawl and the ratchet tooth in the first transmission assembly are disengaged; the space of the third oil cavity is reduced, the sliding block in the second transmission assembly is driven to move away from the axial center of the inner sleeve, and then the pawl and the ratchet tooth in the second transmission assembly are engaged.

5. The self-adjusting tower crane wall-attached rod according to claim 4, characterized in that: Each adjusting mechanism further comprises a first limiting ring and a second limiting ring, both of which are fixedly arranged on the adjusting rod and coaxially arranged with the adjusting rod; the first limiting ring and the second limiting ring are sequentially distributed along the direction from the end of the connecting pipe to the middle of the connecting pipe; The adjusting block is fixedly provided with a first connecting rod and a second connecting rod on both sides of the axial direction of the inner sleeve, respectively, the first connecting rod is used for abutting against the first limiting ring, and the second connecting rod is used for abutting against the second limiting ring.

6. The self-adjusting tower crane wall-attached rod according to claim 2, characterized in that: The outer sleeve and the inner sleeve are both provided with a clean oil cavity and a contaminated oil cavity, and a filter membrane is arranged between the clean oil cavity and the contaminated oil cavity; The side of the outer sleeve in contact with the connecting pipe is provided with a first oil storage groove, the first oil storage groove is communicated with the first threaded groove; the second oil storage groove is formed between the outer sleeve and the adjusting rod; the clean oil cavity in the inner sleeve is communicated with the first oil storage groove and the second oil storage groove, and the contaminated oil cavity in the inner sleeve is communicated with the first oil storage groove and the second oil storage groove; The side of the inner sleeve in contact with the connecting pipe is provided with a third oil storage groove; the side of the inner sleeve close to the adjusting rod is provided with a fourth oil storage groove, the fourth oil storage groove is communicated with the second threaded groove; the clean oil cavity in the inner sleeve is communicated with the third oil storage groove and the fourth oil storage groove, and the contaminated oil cavity in the inner sleeve is communicated with the third oil storage groove and the fourth oil storage groove.

7. The self-adjusting tower crane wall-attached rod according to claim 6, characterized in that: Each clean oil cavity is provided with an oil outlet check valve, the oil outlet check valve allows the hydraulic oil in the clean oil cavity to flow outwards; each contaminated oil cavity is provided with an oil return check valve, the oil return check valve allows the hydraulic oil from the outside to flow into the contaminated oil cavity.

8. The self-adjusting tower crane wall-attached rod according to claim 6, characterized in that: Each connecting mechanism further comprises two lubricating assemblies, the two lubricating assemblies are respectively arranged in the inner sleeve and the outer sleeve; each lubricating assembly comprises a sliding ring and a second spring; the sliding ring is arranged along the axial direction of the connecting pipe, one side of the sliding ring in the axial direction of the connecting pipe is arranged in the clean oil cavity, and the other side abuts against the disc spring; the second spring in the inner sleeve connects the sliding ring and the inner sleeve, and the second spring in the outer sleeve connects the sliding ring and the outer sleeve.

9. The self-adjusting tower crane wall-attached rod according to claim 1, characterized in that: The outer peripheral wall of the inner sleeve is fixedly provided with a worm gear, and the worm gear and the inner sleeve are coaxially arranged; each connecting mechanism further comprises a driving assembly, and the driving assembly comprises a mounting box and a worm; the mounting box is slidingly arranged on the connecting pipe along the axial direction of the connecting pipe; the worm is rotatably arranged in the mounting box, the worm is arranged along the tangential direction of the inner sleeve, and the worm is engaged with the worm gear.

10. A self-adjusting tower crane wall attachment rod according to claim 1, characterized in that: The outer sleeve is provided with a first annular groove at one end close to the inner sleeve, the inner sleeve is provided with a second annular groove at one end close to the outer sleeve, and one end of the outer sleeve is slidingly arranged in the second annular groove; the first annular groove and the second annular groove are communicated, one end of the disc spring is located in the first annular groove, and the other end of the disc spring is located in the second annular groove.

Images