Folding arm form monitoring device of shipborne hydraulic folding arm crane
By designing a folding arm form monitoring device in the hydraulic folding arm crane, and using an elastic telescopic detection rod to monitor the stability of the folding arm form changes, the shortcomings of the hydraulic folding arm crane in the prior art in the monitoring of the folding arm form are solved, and the safety of the operation is improved.
Patent Information
- Application Number
- CN202422294735.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-09-20
AI Technical Summary
The existing hydraulic folding arm cranes have little force in monitoring the shape change of the folding arm, which poses safety hazards, and are prone to failure of the folding arm form due to improper use or negligence, which affects lifting operations and causes economic losses.
A folding arm form monitoring device is designed, and the connected elastic telescopic detection rod rotates and stretches at a fixed point through the folding and stretching process, so as to monitor the stability of the folding arm form change through the elastic force change speed.
By monitoring the elastic force change speed, the state of the folding arm shape can be judged in real time. It means normal when it is relatively stable, and it means too large or too small in an instant indicates a fault. The lifting operation is stopped in time and maintenance is carried out to improve the safety of the hydraulic folding arm crane.
Smart Images
Figure CN222948004U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of hydraulic folding arm cranes, and in particular relates to a folding arm shape monitoring device of a ship-borne hydraulic folding arm crane. Background Art
[0002] Hydraulic folding arm crane is a kind of lifting equipment that uses hydraulic system to realize the extension and folding of the arm. Because its boom can be extended and folded, it is more convenient to operate and lift heavy objects in the limited space of the ship. Due to the foldable and extendable characteristics of the folding arm, the weight of the cargo that can be lifted by the hydraulic folding arm crane is relatively limited. Improper use or even negligence in occasional overweight operations can easily cause folding arm shape failures, affecting lifting operations and causing economic losses. The existing hydraulic folding arm cranes also have relatively weak monitoring of folding arm shape changes, which poses a safety hazard. Summary of the invention
[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the utility model provides a folding arm shape monitoring device for a ship-borne hydraulic folding arm crane, which drives the connected elastic telescopic detection rod to rotate and retract at a fixed point during the folding and extending process of the folding arm, thereby monitoring the stability of the folding arm shape change through the speed of elastic force change.
[0004] Technical solution: To achieve the above-mentioned purpose, the utility model provides a folding arm shape monitoring device for a ship-borne hydraulic folding arm crane, comprising a folding arm of the hydraulic folding arm crane, wherein the folding arm is composed of a main arm frame and a secondary arm frame which are hinged to each other, and the main arm frame and the secondary arm frame can be folded and extended through a hinge point;
[0005] It also includes a folding arm shape monitoring device; the folding arm shape monitoring device includes a moving shaft, a fixed shaft and an elastic telescopic detection rod, the moving shaft is rotatably set on the main arm frame, the fixed shaft is fixedly set on the auxiliary arm frame, and the moving shaft and the fixed shaft are connected through the elastic telescopic detection rod; when the folding arm is in a folding and extending state, the elastic telescopic detection rod is driven to rotate at a fixed point along the moving shaft and elastically extend and retract.
[0006] Furthermore, the elastic telescopic detection rod includes a telescopic tube sleeve and an elastic detection part; the two ends of the telescopic tube sleeve are respectively connected to the movable shaft and the fixed shaft; the elastic detection part is located in the telescopic tube sleeve, and the movable shaft and the fixed shaft are elastically connected through the elastic detection part.
[0007] Furthermore, the telescopic pipe sleeve is composed of a plurality of pipe sections that are slidably sleeved in sequence.
[0008] Furthermore, the elastic detection part is a pressure sensor spring coaxial with the telescopic sleeve.
[0009] Furthermore, the moving shaft is installed on the main boom through a matching shaft seat; a gear is coaxially installed on the moving shaft, and a speed sensor is installed on the shaft seat through a bracket, and the speed sensor faces the tooth surface of the gear.
[0010] Furthermore, the main boom is hinged on the tower body on the rotating assembly of the hydraulic folding arm crane, and a boom cylinder is connected between the main boom and the tower body; a folding arm cylinder is connected between the main boom and the auxiliary boom, and the auxiliary boom can extend and fold relative to the main boom through the extension and contraction of the folding arm cylinder.
[0011] Beneficial effect: The utility model drives the connected elastic telescopic detection rod to rotate and telescope at a fixed point during the folding and extending process of the folding arm, thereby monitoring the stability of the folding arm's morphological change through the elastic force changing speed. When the elastic force changing speed is relatively stable, it indicates that the folding arm's morphological change is normal and there is no fault. When the elastic force changing speed is instantaneously too large or too small, it indicates that the folding arm's morphological change is abnormal and a fault occurs. The lifting operation should be stopped in time and repairs should be carried out to improve the safety of the hydraulic folding arm crane during operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a structural schematic diagram of a hydraulic folding arm crane of the utility model;
[0013] Figure 2 It is a structural schematic diagram of the folding arm morphology monitoring device. DETAILED DESCRIPTION
[0014] The utility model is further described below in conjunction with the accompanying drawings.
[0015] like Figure 1 As shown, a folding arm shape monitoring device for a ship-borne hydraulic folding arm crane includes a folding arm 3 of the hydraulic folding arm crane, and the folding arm 3 is composed of a main arm frame 31 and a secondary arm frame 32 that are hinged to each other. The main arm frame 31 and the secondary arm frame 32 can be folded and extended through the hinge point. Due to the foldable and extendable characteristics of the folding arm, the weight of the cargo that can be lifted by the hydraulic folding arm crane is relatively limited. Improper use or even negligence in occasional overweight operations can easily cause folding arm shape failures, affecting lifting operations and causing economic losses. The existing hydraulic folding arm crane also has a relatively weak monitoring force on the folding arm shape changes, which poses a safety hazard.
[0016] In order to solve the above problems, Figure 1 and Figure 2As shown, the utility model also includes a folding arm shape monitoring device 6; the folding arm shape monitoring device 6 includes a moving shaft 64, a fixed shaft 62 and an elastic telescopic detection rod 63, the moving shaft 64 is rotatably arranged on the main arm frame 31, the fixed shaft 62 is fixedly arranged on the auxiliary arm frame 32, and the moving shaft 64 and the fixed shaft 62 are connected through the elastic telescopic detection rod 63; when the folding arm 3 is in the folding and stretching motion state, the elastic telescopic detection rod 63 is driven to rotate and elastically stretch along the moving shaft 64. The utility model drives the connected elastic telescopic detection rod 63 to rotate and stretch at a fixed point during the folding and stretching process of the folding arm 3, thereby monitoring the stability of the folding arm shape change through the elastic force change speed. When the elastic force change speed is relatively stable, it indicates that the folding arm shape change is normal and there is no fault. When the elastic force change speed is instantaneously too large or too small, it indicates that the folding arm shape change is abnormal and there is a fault. The lifting operation should be stopped in time and repaired, thereby improving the safety of the hydraulic folding arm crane during operation.
[0017] More specifically, Figure 2 As shown, the elastic telescopic detection rod 63 includes a telescopic sleeve 631 and an elastic detection part 632; the two ends of the telescopic sleeve 631 are respectively connected to the movable shaft 64 and the fixed shaft 62; the elastic detection part 632 is located in the telescopic sleeve 631, and the movable shaft 64 and the fixed shaft 62 are elastically connected through the elastic detection part 632. The telescopic sleeve 631 is composed of a plurality of pipe sections that are sequentially slidably connected, a first mounting protrusion 640 is provided on the side of the movable shaft 64, and a second mounting protrusion 620 is provided on the side of the fixed shaft 62. The pipe sections at the two ends of the telescopic sleeve 631 are respectively mounted on the first mounting protrusion 640 and the second mounting protrusion 620 by screws. The elastic detection part 632 is a pressure sensor spring coaxial with the telescopic sleeve 631. The real-time elastic force can be obtained by the extension and contraction of the pressure sensor spring, and then the elastic force change speed can be obtained, which is used to judge the state stability of the change of the folding arm shape.
[0018] In order to further improve the accuracy and stability of the folding arm morphology monitoring, in the present utility model, the movable shaft 64 is installed on the main arm frame 31 through the matching shaft seat 61; a gear 65 is coaxially installed on the movable shaft 64, and a speed sensor 66 is installed on the shaft seat 61 through a bracket, and the speed sensor 66 faces the tooth surface of the gear 65. The speed sensor 66 obtains the speed of the movable shaft 64 in real time. When the speed of the movable shaft 64 is relatively stable, it indicates that the folding arm morphology changes normally and there is no fault. If the speed of the movable shaft 64 is too large or too small instantly, it indicates that the folding arm morphology changes abnormally and there is a fault.
[0019] Both elastic force detection and rotation speed detection can determine the stability of the folding arm shape. Elastic force detection is the main method, and rotation speed detection is the auxiliary method. The two cooperate with each other to improve the accuracy of folding arm shape monitoring.
[0020] like Figure 1As shown, the main boom 31 is hinged on the tower body 2 on the rotating assembly 1 of the hydraulic folding arm crane, and a boom cylinder 4 is connected between the main boom 31 and the tower body 2; a folding arm cylinder 5 is connected between the main boom 31 and the auxiliary boom 32, and the auxiliary boom 32 can be extended and folded relative to the main boom 31 through the extension and contraction of the folding arm cylinder 5.
[0021] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. A folding arm shape monitoring device for a ship-borne hydraulic folding arm crane, comprising a folding arm (3) of the hydraulic folding arm crane, wherein the folding arm (3) is composed of a main arm frame (31) and a secondary arm frame (32) which are hinged to each other, and the main arm frame (31) and the secondary arm frame (32) can be folded and extended through a hinge point; Features: It also includes a folding arm shape monitoring device (6); the folding arm shape monitoring device (6) includes a moving shaft (64), a fixed shaft (62) and an elastic telescopic detection rod (63); the moving shaft (64) is rotatably arranged on the main arm frame (31), the fixed shaft (62) is fixedly arranged on the auxiliary arm frame (32), and the moving shaft (64) and the fixed shaft (62) are connected via the elastic telescopic detection rod (63); when the folding arm (3) is in a folding and stretching state, the elastic telescopic detection rod (63) is driven to rotate at a fixed point along the moving shaft (64) and to elastically extend and retract.
2. The folding arm shape monitoring device of a ship-borne hydraulic folding arm crane according to claim 1 is characterized in that: The elastic telescopic detection rod (63) comprises a telescopic tube sleeve (631) and an elastic detection portion (632); the two ends of the telescopic tube sleeve (631) are respectively connected to the movable shaft (64) and the fixed shaft (62); the elastic detection portion (632) is located inside the telescopic tube sleeve (631), and the movable shaft (64) and the fixed shaft (62) are elastically connected via the elastic detection portion (632).
3. The folding arm shape monitoring device of a ship-borne hydraulic folding arm crane according to claim 2, characterized in that: The telescopic pipe sleeve (631) is composed of a plurality of pipe sections that are slidably sleeved in sequence.
4. The folding arm shape monitoring device of a ship-borne hydraulic folding arm crane according to claim 2, characterized in that: The elastic detection part (632) is a pressure sensor spring coaxial with the telescopic sleeve (631).
5. The folding arm shape monitoring device of a ship-borne hydraulic folding arm crane according to claim 2, characterized in that: The movable shaft (64) is mounted on the main arm frame (31) via a matching shaft seat (61); a gear (65) is coaxially mounted on the movable shaft (64); a rotation speed sensor (66) is mounted on the shaft seat (61) via a bracket, and the rotation speed sensor (66) faces the tooth surface of the gear (65).
6. The folding arm shape monitoring device of a ship-borne hydraulic folding arm crane according to claim 1, characterized in that: The main boom (31) is hinged on a tower body (2) on a rotary assembly (1) of a hydraulic folding boom crane, and a boom cylinder (4) is connected between the main boom (31) and the tower body (2); a folding boom cylinder (5) is connected between the main boom (31) and a secondary boom (32), and the secondary boom (32) can extend and fold relative to the main boom (31) through the extension and contraction of the folding boom cylinder (5).