Telescopic driving mechanism for crane jib
By using a drive system that links hydraulic push rods, transmission motors, and chains, combined with the design of limit grooves and limit blocks, the problems of insufficient driving force and poor control precision in the crane boom telescopic drive mechanism are solved, achieving efficient and stable telescopic movement of the boom and ensuring the safety of lifting operations.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-18
- Publication Date
- 2026-03-20
AI Technical Summary
Existing crane boom telescopic drive mechanisms suffer from insufficient driving force and poor control precision, resulting in the boom failing to accurately reach the target position and exhibiting unstable movement, which affects the safety of lifting operations and the stability of goods.
The telescopic boom is driven by a combination of hydraulic push rods, a drive motor, and a chain, and features a limit groove and limit block design to ensure its accuracy and stability. It also absorbs impact forces through a buffer assembly to protect the equipment structure.
It achieves efficient and stable telescopic movement of the boom, ensuring the safety and reliability of goods during the lifting process, preventing swaying and collisions, and improving the accuracy and safety of lifting operations.
Smart Images
Figure CN224015211U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to engineering machinery technical field especially relates to a crane boom telescopic drive mechanism. BACKGROUND
[0002] The crane boom telescopic drive mechanism is one of the key components in the crane, mainly used for controlling the telescoping of the boom to realize different operation requirements, and the traditional driving mode adopts a hydraulic system or a mechanical transmission system, but problems such as insufficient driving force and poor control accuracy often occur in the operation process, therefore, developing an efficient, stable and accurate drive mechanism becomes an important direction to improve the performance of the crane.
[0003] However, in actual use, there are still the following deficiencies, for example: the existing crane boom telescopic drive mechanism cannot guarantee the accuracy and stability of the boom movement, when the boom needs to be accurately stretched to a specific position for hoisting operation, the driving mechanism cannot guarantee the accuracy of the boom movement, which may cause the boom to fail to accurately reach the target position, and poor stability of the boom movement will cause the goods to shake during hoisting, speed fluctuation or shaking occurs when the boom telescopes, which will transfer this instability to the goods, causing the goods to swing in the air with increased amplitude, which not only may cause the goods to collide with surrounding objects, causing damage to the goods and casualties, but also will reduce the safety of the hoisting operation.
[0004] Therefore, the utility model provides a crane boom telescopic drive mechanism to solve the above problems. UTILITY MODEL CONTENTS
[0005] The utility model aims at solving the shortcomings in the prior art and provides a crane boom telescopic drive mechanism.
[0006] In order to achieve the above object, the utility model adopts the following technical scheme: a crane boom telescopic drive mechanism, comprising:
[0007] Boom section;
[0008] Boom assembly, the boom assembly is placed on the boom section, the boom assembly comprises a telescopic arm arranged on the boom section, one end of the telescopic arm is fixed with a fixed seat, and a lifting hook is arranged on the fixed seat;
[0009] Telescopic assembly is placed on the section arm, the telescopic assembly includes the hydraulic push rod installed on the section arm, the output end of the hydraulic push rod is fixed with the connecting block, the connecting block is rotatably connected with the gear, the gear is provided with the chain, one end of the chain is fixed on the section arm, the other end of the chain is fixed with the connecting rod, the telescopic arm is arranged on the connecting rod, the first limit block is fixed on the connecting rod, the first limit groove is formed on the side of the section arm close to the first limit block, the first limit block is slidably connected in the first limit groove, the support plate is fixed on the first limit block, the transmission motor is installed on the support plate, and the connecting rod is fixed on the output end of the transmission motor.
[0010] Further, the second limit block is fixed on the telescopic arm, and the second limit groove is formed on the side of the section arm close to the second limit block.
[0011] The beneficial effects of the above further scheme are: the second limit block is fixed on the telescopic arm and slidably connected in the second limit groove of the section arm, when the telescopic arm telescopes, the second limit block slides along the second limit groove, limits the movement range of the telescopic arm, prevents it from overextending or retracting, ensures that the boom assembly operates within a safe range, and improves the stability and accuracy of movement.
[0012] Further, the section arm is provided with a buffer assembly, and the buffer assembly includes a first limiting plate fixed on one side of the telescopic arm close to the top.
[0013] The beneficial effects of the above further scheme are: the first limiting plate is fixed on one side of the telescopic arm close to the top, when the telescopic arm telescopes to the limit position, the impact of the telescopic arm when extending to the limit position is buffered through the set buffer assembly, and the equipment structure is protected.
[0014] Further, the section arm is provided with a buffer assembly, and the buffer assembly includes a first limiting plate fixed on one side of the telescopic arm close to the top.
[0015] The beneficial effects of the above further scheme are: the first limiting plate is fixed on one side of the telescopic arm close to the top, when the telescopic arm telescopes to the limit position, the impact of the telescopic arm when extending to the limit position is buffered through the set buffer assembly, and the equipment structure is protected.
[0016] Further, the fixed block is slidably connected with a limiting rod on the fixed block, and the second limiting plate is fixed on one end of the limiting rod away from the fixed block.
[0017] The beneficial effect of the further scheme is that one end of the limiting rod is slidingly connected to the fixed block, and the other end is fixed with the second limiting plate; when the telescopic arm approaches the limit position, the second limiting plate contacts the first limiting plate, the impact force is transmitted through the limiting rod, the buffering assembly starts to work, and damage of the equipment caused by the impact is reduced.
[0018] Further, the limiting rod is provided with a telescopic spring, one end of the telescopic spring is fixed to the fixed block, and the other end of the telescopic spring is fixed to the second limiting plate.
[0019] The beneficial effect of the further scheme is that one end of the telescopic spring is fixed to the fixed block, and the other end of the telescopic spring is fixed to the second limiting plate; when the second limiting plate is impacted, the telescopic spring is compressed to absorb the impact energy, the buffering effect is achieved, and the elastic restoring force of the spring enables the second limiting plate to return to the initial position, so that the repeated use of the buffering assembly is ensured.
[0020] Further, one end of the limiting rod away from the second limiting plate is fixed with a third limiting block.
[0021] The beneficial effect of the further scheme is that the third limiting block is fixed to the end of the limiting rod away from the second limiting plate, and is used for limiting the movement range of the limiting rod; when the limiting rod moves, the third limiting block contacts the fixed block to prevent the limiting rod from moving excessively, and ensure that the buffering assembly works within a safe range.
[0022] Compared with the prior art, the advantages and positive effects of the utility model are that:
[0023] In the utility model, the hydraulic push rod drives the connecting block to move, drives the gear to rotate, the gear drives the connecting rod to slide along the first limiting groove through the chain, the connecting rod is connected with the telescopic arm, so that the telescopic arm is driven to extend, the first limiting block is fixed with the supporting plate, when the boom needs to be retracted, the transmission motor on the supporting plate drives the connecting rod to rotate, so that the connecting rod winds the chain, and the stable retraction of the telescopic arm is ensured, the boom assembly realizes the hoisting of the load through the fixed seat and the hook, and the cooperation of the hydraulic push rod, the transmission motor and the chain ensures the stable extension and retraction of the telescopic arm, and the cooperation of the first limiting groove and the first limiting block ensures the accuracy and stability of the movement. ACCURACY
[0024] Figure 1 It is a structural schematic view of the telescopic driving mechanism of the crane boom of the utility model;
[0025] Figure 2 It is a telescopic assembly structure schematic view of the telescopic driving mechanism of the crane boom of the utility model;
[0026] Figure 3 It is a telescopic assembly structure split schematic view of the telescopic driving mechanism of the crane boom of the utility model;
[0027] Figure 4 It is a telescopic driving mechanism's boom assembly structure schematic view of the utility model of a crane boom.
[0028] Figure 5 It is a buffer assembly structure schematic view of the utility model of a crane boom telescopic driving mechanism.
[0029] Reference signs:
[0030] 1, the boom;
[0031] 2, the boom assembly; 21, the telescopic arm; 22, the fixed seat; 23, the lifting hook;
[0032] 3, the telescopic assembly; 31, the hydraulic push rod; 32, the connecting block; 33, the gear; 34, the chain; 35, the connecting rod; 36, the first limit block; 37, the first limit slot; 38, the support plate; 39, the transmission motor; 310, the second limit block; 311, the second limit slot;
[0033] 4, the buffer assembly; 41, the first limit plate; 42, the fixed block; 43, the limit rod; 44, the second limit plate; 45, the telescopic spring; 46, the third limit block. DETAILED DESCRIPTION
[0034] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0035] As shown in Figures 1-4 The utility model provides a kind of technical scheme: a crane boom telescopic driving mechanism, comprising:
[0036] Boom 1;
[0037] Boom assembly 2, boom assembly 2 is placed on boom 1, and boom assembly 2 includes telescopic arm 21 arranged on boom 1, and fixed seat 22 is fixed to one end of telescopic arm 21, and lifting hook 23 is arranged on fixed seat 22;
[0038] The telescopic assembly 3 is arranged on the joint arm 1, the telescopic assembly 3 comprises a hydraulic push rod 31 arranged on the joint arm 1, the output end of the hydraulic push rod 31 is fixed with a connecting block 32, the connecting block 32 is rotatably connected with a gear 33, the gear 33 is provided with a chain 34, one end of the chain 34 is fixed on the joint arm 1, the other end of the chain 34 is fixed with a connecting rod 35, the telescopic arm 21 is arranged on the connecting rod 35, the connecting rod 35 is fixed with a first limiting block 36, the side of the joint arm 1 close to the first limiting block 36 is provided with a first limiting groove 37, the first limiting block 36 is slidably connected in the first limiting groove 37, the first limiting block 36 is fixed with a supporting plate 38, the supporting plate 38 is arranged with a transmission motor 39, the connecting rod 35 is fixed on the output end of the transmission motor 39, when the telescopic arm 21 needs to be extended, the hydraulic push rod 31 pushes the connecting block 32 to move, drives the gear 33 to rotate, the gear 33 pulls the connecting rod 35 to slide along the first limiting groove 37 through the chain 34, since the connecting rod 35 is connected with the telescopic arm 21, the telescopic arm 21 is driven to extend outward, in this process, the cooperation of the first limiting groove 37 and the first limiting block 36 ensures the accuracy and stability of the movement, prevents the telescopic arm 21 from deviating from the predetermined track, when the crane needs to be retracted, the transmission motor 39 on the supporting plate 38 is started, drives the connecting rod 35 to rotate, the rotation of the connecting rod 35 gradually winds the chain 34, pulls the telescopic arm 21 to retract stably, the cooperation of the hydraulic push rod 31 and the transmission motor 39 ensures the stability and controllability of the telescopic arm 21 during the telescopic process, the crane assembly 2 realizes the hoisting of the load through the fixed seat 22 and the lifting hook 23, the whole system realizes the efficient and stable telescopic movement through the linkage of the hydraulic push rod 31, the transmission motor 39 and the chain 34, the first limiting groove 37 and the first limiting block 36 further ensure the accuracy and stability of the movement, prevent the deviation or shaking caused by external force or vibration, thereby ensuring the safety and reliability of the hoisting operation.
[0039] In the above scheme, the telescopic arm 21 cannot meet the problem of buffering the impact of the telescopic arm 21 when it is extended to the limit position, for example Figures 1-2 and Figure 4 As shown: the telescopic arm 21 is fixed with a second limiting block 310, the side of the joint arm 1 close to the second limiting block 310 is provided with a second limiting groove 311, the second limiting block 310 is slidably connected in the second limiting groove 311, the second limiting block 310 is fixed on the telescopic arm 21 and slidably connected in the second limiting groove 311 of the joint arm 1, when the telescopic arm 21 is telescoped, the second limiting block 310 slides along the second limiting groove 311, limits the movement range of the telescopic arm 21, prevents it from overextending or retracting, ensures the operation of the crane assembly 2 within the safety range, and improves the stability and accuracy of the movement;
[0040] As shown in Figures 1-2 and Figures 4-5As shown, the boom 1 is provided with a buffer assembly 4, the buffer assembly 4 includes a first limiting plate 41 fixed on the telescopic arm 21 near the top side, the first limiting plate 41 is fixed on the telescopic arm 21 near the top side, when the telescopic arm 21 telescopes to the limit position, through the setting of the buffer assembly 4, the buffer telescopic arm 21 in the impact of extending to the limit position, protect the equipment structure, the side of the boom 1 close to the first limiting plate 41 is fixed with a fixed block 42, the fixed block 42 is fixed on the boom 1, the limiting rod 43 is slidingly connected on the fixed block 42, when the telescopic arm 21 moves, the first limiting plate 41 pushes the second limiting plate 44, so that the limiting rod 43 moves with the second limiting plate 44, plays a guiding and limiting role, the fixed block 42 provides support for the limiting rod 43, ensures that the limiting rod 43 remains stable during movement, the fixed block 42 is slidingly connected with the limiting rod 43, one end of the limiting rod 43 away from the fixed block 42 is fixed with the second limiting plate 44, one end of the limiting rod 43 is slidingly connected on the fixed block 42, the other end is fixed with the second limiting plate 44, when the telescopic arm 21 approaches the limit position, the second limiting plate 44 contacts with the first limiting plate 41, through the limiting rod 43 transmits the impact force, the buffer assembly 4 begins to play a role, reduces the damage of impact on the equipment, the limiting rod 43 is provided with a telescopic spring 45, one end of the telescopic spring 45 is fixed on the fixed block 42, the other end of the telescopic spring 45 is fixed on the second limiting plate 44, one end of the telescopic spring 45 is fixed on the fixed block 42, the other end is fixed on the second limiting plate 44, when the second limiting plate 44 is impacted, the telescopic spring 45 is compressed, absorbs the impact energy, plays a buffering role, the elastic restoring force of the spring makes the second limiting plate 44 return to the initial position, ensures the repeated use of the buffer assembly 4, one end of the limiting rod 43 away from the second limiting plate 44 is fixed with a third limiting block 46, the third limiting block 46 is fixed on the end of the limiting rod 43 away from the second limiting plate 44, for limiting the movement range of the limiting rod 43, when the limiting rod 43 moves, the third limiting block 46 contacts with the fixed block 42, prevents the limiting rod 43 from moving excessively, ensures that the buffer assembly 4 works within the safe range.
[0041] Working principle:
[0042] As Figures 1-5When the telescopic arm 21 needs to be extended, the hydraulic push rod 31 pushes the connecting block 32 to move, driving the gear 33 to rotate, the gear 33 pulls the connecting rod 35 to slide along the first limiting groove 37 through the chain 34, since the connecting rod 35 is connected with the telescopic arm 21, thus driving the telescopic arm 21 to extend outward, the cooperation of the first limiting groove 37 and the first limiting block 36 ensures the accuracy and stability of the movement, preventing the telescopic arm 21 from deviating from the predetermined track, when the boom needs to be retracted, the transmission motor 39 on the support plate 38 starts to drive the connecting rod 35 to rotate, the rotation of the connecting rod 35 gradually winds the chain 34, pulling the telescopic arm 21 to retract stably, the cooperation of the hydraulic push rod 31 and the transmission motor 39 ensures the stability and controllability of the telescopic arm 21 during the telescopic process, the second limiting block 310 is further arranged on the telescopic arm 21, the second limiting block 310 is slidingly connected in the second limiting groove 311 of the section arm 1, limiting the movement range of the telescopic arm 21, preventing it from being excessively extended or retracted, ensuring the boom assembly 2 to operate within a safe range, in addition, the section arm 1 is provided with the buffer assembly 4, including the first limiting plate 41, the fixed block 42, the limiting rod 43, the second limiting plate 44 and the telescopic spring 45, when the telescopic arm 21 approaches the limit position, the second limiting plate 44 contacts the first limiting plate 41, the impact force is transmitted through the limiting rod 43, the telescopic spring 45 is compressed, absorbing the impact energy, playing a buffering role, the elastic restoring force of the spring makes the second limiting plate 44 return to the initial position, ensuring the repeated use of the buffer assembly 4, the third limiting block 46 limits the movement range of the limiting rod 43, preventing it from moving excessively, ensuring the buffer assembly 4 to work within a safe range, the whole system realizes efficient and stable telescopic movement through the linkage of the hydraulic push rod 31, the transmission motor 39, the chain 34, the limiting structure and the buffer assembly 4, ensuring the safety and reliability of the hoisting operation.
[0043] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technology content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application still falls within the protection scope of the present application.
Claims
1. A crane boom telescopic drive mechanism, characterized in that, include: Segment arm (1); A boom assembly (2) is placed on a boom section (1). The boom assembly (2) includes a telescopic boom (21) disposed on the boom section (1). One end of the telescopic boom (21) is fixed with a fixed seat (22). A hook (23) is disposed on the fixed seat (22). Telescopic assembly (3), the telescopic assembly (3) is placed on the arm (1), the telescopic assembly (3) includes a hydraulic push rod (31) mounted on the arm (1), the output end of the hydraulic push rod (31) is fixed with a connecting block (32), a gear (33) is rotatably connected to the connecting block (32), a chain (34) is provided on the gear (33), one end of the chain (34) is fixed to the arm (1), and the other end of the chain (34) is fixed with a connecting rod (35), the telescopic arm (21) Set on the connecting rod (35), the connecting rod (35) is fixed with a first limiting block (36), the arm (1) is provided with a first limiting groove (37) on the side near the first limiting block (36), the first limiting block (36) is slidably connected in the first limiting groove (37), the first limiting block (36) is fixed with a support plate (38), the support plate (38) is mounted with a drive motor (39), and the connecting rod (35) is fixed on the output end of the drive motor (39).
2. The crane boom telescopic drive mechanism according to claim 1, characterized in that: A second limiting block (310) is fixed on the telescopic arm (21), and a second limiting groove (311) is provided on the side of the segment arm (1) near the second limiting block (310). The second limiting block (310) is slidably connected in the second limiting groove (311).
3. The crane boom telescopic drive mechanism according to claim 1, characterized in that: A buffer assembly (4) is provided on the telescopic arm (1), the buffer assembly (4) including a first limiting plate (41) fixed on the telescopic arm (21) near the top side.
4. The crane boom telescopic drive mechanism according to claim 3, characterized in that: A fixing block (42) is fixed on the side of the arm (1) near the first limiting plate (41).
5. A crane boom telescopic drive mechanism according to claim 4, characterized in that: A limiting rod (43) is slidably connected to the fixed block (42), and a second limiting plate (44) is fixed to one end of the limiting rod (43) away from the fixed block (42).
6. A crane boom telescopic drive mechanism according to claim 5, characterized in that: A telescopic spring (45) is provided on the limiting rod (43). One end of the telescopic spring (45) is fixed on the fixing block (42), and the other end of the telescopic spring (45) is fixed on the second limiting plate (44).
7. A crane boom telescopic drive mechanism according to claim 6, characterized in that: A third limiting block (46) is fixed at one end of the limiting rod (43) away from the second limiting plate (44).