Telescopic crane suitable for complex terrains

Abstract

The invention relates to the technical field of cranes, in particular to a telescopic crane suitable for complex terrains, according to the design, two first adjusting cylinders are arranged on a rotating frame, a first screw rod is rotationally arranged in each first adjusting cylinder through a bearing, the two first screw rods are connected through a synchronous belt and a synchronous wheel, and one of the first screw rods is driven by a first motor; a first threaded cylinder is slidably arranged in each first adjusting cylinder, a first screw rod is arranged in each first threaded cylinder in a threaded mode, a second adjusting cylinder is arranged at one end of each first threaded cylinder, and a second screw rod is rotationally arranged in each second adjusting cylinder through a bearing and is driven by a second motor; a second threaded barrel is slidably arranged in the second adjusting barrel, the second threaded rod is arranged in the second threaded barrel in a threaded mode, the motor drives the threaded rod to rotate, then the threaded barrel stretches out and draws back, mechanical stretching out and drawing back are achieved, and potential safety hazards caused by hydraulic oil sealing aging, pipeline damage or connection loosening when stretching out and drawing back are achieved through hydraulic pressure are avoided.

Description

Technical Field

[0001] This invention relates to the field of crane technology, and more particularly to a telescopic crane suitable for complex terrain. Background Technology

[0002] In power construction, the installation of utility poles is a crucial step, and the process involves two main steps: drilling and erection. Traditionally, this requires using equipment such as excavators to manually dig holes for the utility poles, and then using a crane to lift the poles to the holes to complete the installation.

[0003] Existing patent CN212356323U discloses a telescopic crane, including an operating platform body. A bearing is embedded in the upper surface of the operating platform body. The inner ring of the bearing is connected to a support column. A steering block is connected to the top of the support column. A groove is formed on the upper surface of the steering block. A rotating shaft is movably connected to the inner side of the groove. A hub wheel is fixedly connected to the outer side of the rotating shaft. A traction rope is wound around the outer surface of the hub wheel. A sleeve is fixedly connected to the side of the steering block. A hydraulic cylinder is connected to the inner wall of the sleeve. A piston is located inside the hydraulic cylinder. A hydraulic rod is connected to the outer side of the piston. The other end of the hydraulic rod is connected to a shaft. Two support plates are connected to the outer side of the shaft. The support plates are hinged to a fixed wheel via pins. The other end of the shaft is connected to a connecting rod. A three-way gripper is connected to the bottom of the connecting rod. This prior art has the advantages of easy telescopic extension, convenient user operation, and favorable market promotion.

[0004] However, in the aforementioned prior art, since hydraulics is used to achieve telescopic movement, the hydraulic part includes components such as hydraulic cylinders, pistons, oil pipes, oil tanks, and filters. Its structure is relatively complex. If the hydraulic oil is damaged due to aging seals, broken pipes, or loose connections, there is a high risk of safety hazards. Therefore, there is an urgent need to provide a crane with a mechanical telescopic structure. Summary of the Invention

[0005] The purpose of this invention is to provide a telescopic crane suitable for complex terrain, solving the problem that the existing technology uses hydraulics to achieve telescopic movement. The hydraulic part includes components such as hydraulic cylinders, pistons, oil pipes, oil tanks, and filters, which have a relatively complex structure. If the hydraulic oil is damaged due to aging seals, broken pipes, or loose connections, there is a high risk of safety hazards. Therefore, there is an urgent need to provide a crane with a mechanical telescopic structure.

[0006] To achieve the above objectives, the present invention provides a telescopic crane suitable for complex terrain, comprising a rotating frame and a base. The rotating frame is provided with two first adjusting cylinders, each containing a first screw rotatably mounted via a bearing. The two first screws are connected by a synchronous belt and a synchronous pulley, and one of the first screws is driven by a first motor. Each first adjusting cylinder contains a first threaded cylinder, with the first screw threaded within it. A second adjusting cylinder is provided at one end of each of the two first threaded cylinders. A second adjusting cylinder contains a second screw rotatably mounted via a bearing, and the second screw is driven by a second motor. A second threaded cylinder is slidably mounted within the second adjusting cylinder, with the second screw threaded within it. A main lifting wheel is provided at one end of the second threaded cylinder. One end of the base is provided with a support seat and a fixed seat. A winding member is provided on the fixed seat, and a traction rope is provided on the winding member. One end of the traction rope is provided with a three-way gripper, and the traction rope passes through the main lifting wheel. The rotating frame is hinged to the support seat.

[0007] The first threaded cylinder and the second threaded cylinder each have multiple limiting grooves on their outer sides. One end of the first adjusting cylinder and one end of the second adjusting cylinder are each provided with a collar. Multiple limiting blocks are provided inside the collar, and the multiple limiting blocks extend into the corresponding limiting grooves.

[0008] The rotating frame is provided with an outer frame, and both first adjusting cylinders are located inside the outer frame. An inner frame is slidably provided on the inner wall of the outer frame, and the second adjusting cylinder is located inside the inner frame. The second threaded cylinder is also fixedly connected to the inner frame and located at one end of the inner frame.

[0009] The inner frame is provided with a first auxiliary lifting wheel on its upper part, and the outer frame is provided with a second auxiliary lifting wheel. The traction rope also passes through the first auxiliary lifting wheel and the second auxiliary lifting wheel.

[0010] An electric push rod is hinged between the outer frame and the base.

[0011] The winding component includes a winding roller and a winding motor. Both ends of the winding roller are provided with rotating shafts. Two fixing covers are provided on the fixed base by bolts. The two fixing covers and the fixed base form a rotating cavity. The winding roller is rotatably mounted in the rotating cavity through the rotating shafts and bearings. One of the rotating shafts is connected to the winding motor through a connector and is located at the output end of the winding motor. The winding motor is located at the outer edge of the base.

[0012] The connector includes a connecting sleeve and a polygonal rod. The connecting sleeve has a polygonal groove. The connecting sleeve is fixedly connected to one of the rotating shafts and is located at one end of the rotating shaft. The polygonal rod is disposed at the output end of the winding motor and is also inserted into the polygonal groove.

[0013] This invention discloses a telescopic crane suitable for complex terrain. The design includes two first adjusting cylinders mounted on a rotating frame. Each first adjusting cylinder contains a first screw rotatably mounted via a bearing. The two first screws are connected by a synchronous belt and a synchronous pulley, with one screw driven by a first motor. A first threaded cylinder is slidably mounted within each first adjusting cylinder, with the first screw threaded into the first threaded cylinder. A second adjusting cylinder is mounted at one end of each of the two first threaded cylinders. A second screw rotatably mounted within the second adjusting cylinder via a bearing and driven by a second motor, and a second threaded cylinder slidably mounted within the second adjusting cylinder, with the second screw threaded into the second threaded cylinder. The motor drives the screws to rotate, thereby causing the threaded cylinders to extend and retract, achieving mechanical extension and retraction. This avoids the safety hazards caused by hydraulic oil seal aging, pipeline damage, or loose connections when using hydraulic extension and retraction. The structure is relatively simple and offers higher safety. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1 This is a three-dimensional perspective view of the first embodiment of the present invention.

[0016] Figure 2 This is a front view of the first embodiment of the present invention.

[0017] Figure 3 This is the invention Figure 2 A cross-sectional view along line AA in the middle.

[0018] Figure 4 This is the invention Figure 2 A cross-sectional view along the BB line.

[0019] Figure 5 This is the invention Figure 4 A magnified view of a section at point C.

[0020] Figure 6 This is the invention Figure 4 A magnified view of a section at point D.

[0021] Figure 7 This is the invention Figure 4 A magnified view of a section at point E in the middle.

[0022] Figure 8 This is a three-dimensional perspective view of the second embodiment of the present invention.

[0023] Figure 9 This is a front view of the second embodiment of the present invention.

[0024] Figure 10 This is the invention Figure 9 A cross-sectional view of the FF line.

[0025] Figure 11 This is the invention Figure 10 A cross-sectional view of the GG line.

[0026] 101-Rotating frame, 102-Base, 103-First adjusting cylinder, 104-First screw, 105-Synchronous belt, 106-Synchronous pulley, 107-First motor, 108-First threaded cylinder, 109-Second adjusting cylinder, 110-Second screw, 111-Second motor, 112-Second threaded cylinder, 113-Main lifting wheel, 114-Support seat, 115-Fixed seat, 116-Traction rope, 117-Three-way gripper, 118-Limiting groove, 119-Loop, 120-Limiting block, 121-Outer frame, 122-Inner frame Frame, 123-First auxiliary lifting wheel, 124-Second auxiliary lifting wheel, 125-Electric push rod, 126-Take-up roller, 127-Take-up motor, 128-Rotating shaft, 129-Fixed cover, 130-Connecting sleeve, 131-Polygonal rod, 132-Polygonal groove, 201-Bogie, 202-Mounting box, 203-Front support wheel, 204-Steering shaft, 205-Worm gear, 206-Linkage rod, 207-Worm end, 208-Rear support wheel, 209-Support platform, 210-Support shaft, 211-Steering motor. Detailed Implementation

[0027] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0028] First embodiment: Please see Figures 1-7This invention provides a telescopic crane suitable for complex terrain, comprising a rotating frame 101 and a base 102. The rotating frame 101 is provided with two first adjusting cylinders 103. Each first adjusting cylinder 103 has a first screw 104 rotatably mounted within it via a bearing. The two first screws 104 are connected by a synchronous belt 105 and a synchronous pulley 106, and one of the first screws 104 is driven by a first motor 107. Each first adjusting cylinder 103 has a first threaded cylinder 108 slidably mounted within it, with the first screw 104 threaded within the first threaded cylinder 108. A second adjusting cylinder 109 is provided at one end of each of the two first threaded cylinders 108. A second screw 110 is rotatably mounted on a bearing and driven by a second motor 111. A second threaded cylinder 112 is slidably mounted inside the second adjusting cylinder 109, and the second screw 110 is threaded into the second threaded cylinder 112. A main lifting wheel 113 is mounted at one end of the second threaded cylinder 112. A support seat 114 and a fixed seat 115 are mounted at one end of the base 102. A winding member is mounted on the fixed seat 115, and a traction rope 116 is mounted on the winding member. A three-way gripper 117 is mounted at one end of the traction rope 116, and the traction rope 116 passes through the main lifting wheel 113. The rotating frame 101 is hinged to the support seat 114.

[0029] In this embodiment, by setting up the rotating frame 101 and the base 102, and configuring two first adjusting cylinders 103 on the rotating frame 101, the first motor 107 drives one of the first screws 104 to rotate. The synchronous belt 105 and synchronous pulley 106 cause both first screws 104 to rotate synchronously, thereby driving the first threaded cylinder 108 to slide within the first adjusting cylinder 103, achieving initial telescopic adjustment. Simultaneously, a second adjusting cylinder 109 is provided at one end of the first threaded cylinder 108, and the second motor 111 drives the second screw 110. Rotation causes the second threaded cylinder 112 to slide within the second adjusting cylinder 109, achieving secondary telescopic adjustment. Finally, the lifting operation is performed by the main lifting wheel 113 at one end of the second threaded cylinder 112 in conjunction with the winding component of the fixed seat 115 on the base 102, the traction rope 116, and the three-way gripper 117. Compared with the hydraulic telescopic structure, this mechanical telescopic structure avoids safety hazards such as hydraulic oil leakage caused by aging seals, damaged pipelines, or loose connections in the hydraulic system. Moreover, the structure is relatively simple, reducing maintenance costs and improving the reliability and safety of the crane when operating in complex terrain.

[0030] Furthermore, the outer side of the first threaded cylinder 108 and the outer side of the second threaded cylinder 112 are provided with a plurality of limiting grooves 118. One end of the first adjusting cylinder 103 and one end of the second adjusting cylinder 109 are provided with a collar 119. A plurality of limiting blocks 120 are provided in the collar 119, and the plurality of limiting blocks 120 extend into the corresponding limiting grooves 118.

[0031] In this embodiment, this design effectively restricts the rotation of the first threaded cylinder 108 and the second threaded cylinder 112 during the extension and retraction process, ensuring that they can only move in a straight line along the axial direction, and preventing problems such as unstable extension and retraction or jamming caused by rotation.

[0032] Furthermore, the rotating frame 101 is provided with an outer frame 121, and both first adjusting cylinders 103 are located inside the outer frame 121. An inner frame 122 is slidably provided on the inner wall of the outer frame 121, and the second adjusting cylinder 109 is located inside the inner frame 122. The second threaded cylinder 112 is also fixedly connected to the inner frame 122 and is located at one end of the inner frame 122.

[0033] In this embodiment, this structural design makes the entire telescopic part more compact and orderly. The outer frame 121 and the inner frame 122 provide protection for the first adjusting cylinder 103 and the second adjusting cylinder 109, reducing the interference and damage of external factors to the telescopic structure. At the same time, it also helps to improve the strength and stability of the overall structure, enabling the crane to better withstand various external forces when operating in complex terrain and extending the service life of the equipment.

[0034] Furthermore, a first auxiliary lifting wheel 123 is provided above the inner frame 122, and a second auxiliary lifting wheel 124 is provided on the outer frame 121. The traction rope 116 also passes through the first auxiliary lifting wheel 123 and the second auxiliary lifting wheel 124.

[0035] In this embodiment, this design changes the direction of the traction rope 116, which can more rationally distribute the traction force, reduce the friction and wear of the traction rope 116 during the traction process, reduce energy loss during the traction process, and improve traction efficiency.

[0036] Furthermore, an electric push rod 125 is hinged between the outer frame 121 and the base 102.

[0037] In this embodiment, the electric push rod 125 can be used to change the angle of the outer frame 121 relative to the base 102 by adjusting the extension length of the electric push rod 125, thereby adjusting the tilt angle of the entire telescopic structure, so that the crane can better adapt to the operation requirements of complex terrain.

[0038] Furthermore, the winding component includes a winding roller 126 and a winding motor 127. Both ends of the winding roller 126 are provided with rotating shafts 128. Two fixing covers 129 are bolted to the fixing base 115, and a rotating cavity is formed between the two fixing covers 129 and the fixing base 115. The winding roller 126 is rotatably mounted in the rotating cavity via the rotating shafts 128 and bearings. One of the rotating shafts 128 is connected to the winding motor 127 via a connector and is located at the output end of the winding motor 127. The winding motor 127 is located at the outer edge of the base 102.

[0039] In this embodiment, by setting the winding motor 127 on the outer edge of the base 102, it is easy to install and maintain. At the same time, the design of the fixed cover 129 and the rotating cavity ensures the stability of the rotation of the winding roller 126, which can reliably realize the winding and unwinding of the traction rope 116 and provide stable power support for lifting operations.

[0040] Furthermore, the connector includes a connecting sleeve 130 and a polygonal rod 131. The connecting sleeve 130 has a polygonal groove 132. The connecting sleeve 130 is fixedly connected to one of the rotating shafts 128 and is located at one end of the rotating shaft 128. The polygonal rod 131 is disposed at the output end of the winding motor 127 and is also inserted into the polygonal groove 132.

[0041] In this embodiment, the polygonal connection method can provide reliable torque transmission when the winding motor 127 drives the rotating shaft 128 to rotate, preventing slippage, and facilitating quick assembly and disassembly of the winding motor 127 and the rotating shaft 128.

[0042] When using a telescopic crane suitable for complex terrain according to this embodiment, the crane is placed in a suitable working position. By adjusting the electric push rod 125 hinged between the outer frame 121 and the base 102, the rotating frame 101 and the entire telescopic structure are adjusted to a suitable angle to adapt to the complex terrain and remain stable. Then, the first motor 107 is started, driving one of the first screws 104 to rotate. The synchronous belt 105 and the synchronous pulley 106 cause both first screws 104 to rotate synchronously, thereby driving the first threaded cylinder 108 to slide within the first adjusting cylinder 103, achieving initial telescopic adjustment to a suitable position. Then, the second motor 111 is started, driving the second screw 110 to rotate, causing the second threaded cylinder 112 to slide within the second adjusting cylinder 109, achieving secondary telescopic adjustment, allowing the main lifting wheel 113 at one end of the second threaded cylinder 112 to reach a suitable working height and position. Simultaneously, during the extension and retraction of the first threaded cylinder 108 and the second threaded cylinder 112, the limiting groove 118 on their outer side cooperates with the limiting block 120 in the corresponding collar 119 to prevent rotation and ensure stable extension and retraction. Then, the three-way gripper 117 at one end of the traction rope 116 is fixed to the object to be lifted, and the winding motor 127 located at the outer edge of the base 102 is started. Through the cooperation of the polygonal rod 131 of the connector and the polygonal groove 132 in the connecting sleeve 130, the power is reliably transmitted to the winding roller 126, causing the winding roller 126 to rotate and wind up the traction rope 116. During the winding process, the traction rope 116 passes through the main lifting wheel 113, the first auxiliary lifting wheel 123 above the inner frame 122, and the second auxiliary lifting wheel 124 on the outer frame 121, reasonably distributing the traction force and reducing wear, thereby achieving stable lifting operation of the object.

[0043] Second embodiment: Based on the first embodiment, please refer to Figures 8-11 The present invention provides a telescopic crane suitable for complex terrain, and further includes a moving mechanism, the moving mechanism including a steering component and a power component, the steering component being disposed at the lower front end of the base 102, and the power component being disposed at the lower rear end of the base 102.

[0044] Furthermore, the steering assembly includes two bogies 201 and a mounting box 202. Each bogie 201 has a front support wheel 203 rotatably mounted on its lower side via a bearing. Each bogie 201 has a steering shaft 204 mounted on its upper side, and a worm gear 205 mounted on its upper side. Each mounting box 202 has a linkage rod 206 rotatably mounted on its upper side via a bearing. The linkage rod 206 has two worm ends 207. The two bogies 201 are rotatably connected to the base 102 via the steering shaft 204 and bearings, respectively, and are located at the lower front end of the base 102. The mounting box 202 is fixedly connected to the base 102 and is located at the other end of the base 102. The worm gear 205 extends into the mounting box 202. The two worm ends 207 mesh with the corresponding worm gears 205 and are located on one side of the two worm gears 205. The linkage rod 206 is driven by a steering motor 211.

[0045] Furthermore, the power assembly includes two rear support wheels 208 and a support platform 209. A support shaft 210 is provided on the support platform 209. The two rear support wheels 208 are respectively located at both ends of the support shaft 210 via hub motors. The support platform 209 is fixedly connected to the base 102 and is located at the lower rear end of the base 102.

[0046] When using a telescopic crane suitable for complex terrain according to this embodiment, when it is necessary to move the crane position, the steering motor 211 in the steering assembly is first activated. The steering motor 211 drives the linkage 206 to rotate. Since the two worm ends 207 on the linkage 206 respectively mesh with the worm wheels 205 above the corresponding steering shaft 204, and the steering shaft 204 is connected to the bogie 201 below, and the front support wheel 203 is rotatably mounted on the bogie 201 via a bearing below, the rotation of the linkage 206 will drive the steering shaft 204 to rotate through the cooperation of the worm ends 207 and the worm wheels 205, thereby making the steering... The frame 201 and the front support wheel 203 are steered to adjust the crane's direction of travel. After the direction is adjusted, the two hub motors in the power assembly are started. The hub motors drive the two rear support wheels 208, which are respectively located at both ends of the support shaft 210, to rotate, providing forward power for the crane to move to the target working position on complex terrain. After reaching the position, the hub motors and the steering motor 211 are stopped. Then, following the above operation method, the angle of the telescopic structure is adjusted by adjusting the electric push rod 125. The first motor 107 and the second motor 111 are started to achieve telescopic adjustment. The winding motor 127 is used in conjunction with the three-way gripper 117 to carry out lifting operations.

[0047] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art will understand that all or part of the processes for implementing the above embodiments and equivalent variations made in accordance with the claims of this application are still within the scope of this application.

Claims

1. A telescopic crane suitable for complex terrain, characterized in that, The system includes a rotating frame and a base. The rotating frame has two first adjusting cylinders, each containing a first screw rotatably mounted via a bearing. The two first screws are connected by a synchronous belt and a synchronous pulley, and one of the first screws is driven by a first motor. Each first adjusting cylinder contains a first threaded cylinder with the first screw threaded inside. A second adjusting cylinder is located at one end of each of the two first threaded cylinders. A second adjusting cylinder contains a second screw rotatably mounted via a bearing, and the second screw is driven by a second motor. A second threaded cylinder is slidably mounted at one end of the second adjusting cylinder with the second screw threaded inside. A main lifting wheel is located at one end of the second threaded cylinder. The base has a support seat and a fixed seat at one end. A winding component is mounted on the fixed seat, and a traction rope is mounted on the winding component. One end of the traction rope has a three-way gripper, and the traction rope passes through the main lifting wheel. The rotating frame is hinged to the support seat.

2. The telescopic crane suitable for complex terrain as described in claim 1, characterized in that, Both the outer side of the first threaded cylinder and the outer side of the second threaded cylinder have multiple limiting grooves. One end of the first adjusting cylinder and one end of the second adjusting cylinder are provided with a collar. Multiple limiting blocks are provided inside the collar, and the multiple limiting blocks extend into the corresponding limiting grooves.

3. The telescopic crane suitable for complex terrain as described in claim 2, characterized in that, The rotating frame is provided with an outer frame, and both first adjusting cylinders are located inside the outer frame. An inner frame is slidably provided on the inner wall of the outer frame, and the second adjusting cylinder is located inside the inner frame. The second threaded cylinder is also fixedly connected to the inner frame and located at one end of the inner frame.

4. The telescopic crane suitable for complex terrain as described in claim 3, characterized in that, A first auxiliary lifting wheel is provided above the inner frame, and a second auxiliary lifting wheel is provided on the outer frame. The traction rope also passes through the first auxiliary lifting wheel and the second auxiliary lifting wheel.

5. The telescopic crane suitable for complex terrain as described in claim 4, characterized in that, An electric push rod is hinged between the outer frame and the base.

6. The telescopic crane suitable for complex terrain as described in claim 5, characterized in that, The winding component includes a winding roller and a winding motor. Both ends of the winding roller are provided with rotating shafts. Two fixing covers are provided on the fixed base by bolts. The two fixing covers and the fixed base form a rotating cavity. The winding roller is rotatably mounted in the rotating cavity through the rotating shaft and bearing. One of the rotating shafts is connected to the winding motor through a connector and is located at the output end of the winding motor. The winding motor is located at the outer edge of the base.

7. The telescopic crane suitable for complex terrain as described in claim 6, characterized in that, The connector includes a connecting sleeve and a polygonal rod. The connecting sleeve has a polygonal groove. The connecting sleeve is fixedly connected to one of the rotating shafts and is located at one end of the rotating shaft. The polygonal rod is disposed at the output end of the winding motor and is also inserted into the polygonal groove.

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