Wireless remote control timber grab compact hydraulic system
Patent Information
- Application Number
- CN202522316902.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-31
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-10-31
AI Technical Summary
[0003]传统的木材抓斗往往采用外挂不锈钢油箱，或者是在下承梁的下部设置有上下宽度一样的不锈钢油箱，导致无线遥控木材抓斗在使用的过程中受限，不适用于小型船舶的货物装卸，实用性较差
1、该无线遥控木材抓斗紧凑型液压系统，设置有不锈钢油箱、遥控电磁阀、回油管、过渡管、三通、高压油管和液压油缸，将不锈钢油箱集成于下承梁内侧，无需额外设置独立油箱安装空间，大幅压缩了系统整体体积，可避免不锈钢油箱突出于下承梁表面，减少作业时与木材或其他部件的干涉，适用于小型船舶的货物抓取，两个高压油管对称分布且分别连接液压油缸，能确保两侧油缸进油流量一致，实现抓斗同步开合，提升作业稳定性，对称分布的加油口能实现双油枪同步注油，提升系统补油效率，整体设计合理，排布紧凑，维修方便。
Smart Images
Figure CN224798375U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wireless remote-controlled timber grab technology, specifically a compact hydraulic system for a wireless remote-controlled timber grab. Background Technology
[0002] The wireless remote-controlled timber grab is an intelligent device specifically designed for loading, unloading, and transferring timber. Its core consists of a high-strength grab body and a wireless remote control system. Widely used in timber mills, ports, forest farms, and storage yards, the grab body is made of wear-resistant, high-strength steel, and its claws are designed to conform to the shape of timber, allowing for flexible grabbing of various sizes of materials such as round logs, square logs, and boards, preventing timber from scattering or being damaged during loading and unloading. The wireless remote control system supports operation from 100 to 300 meters away, eliminating the need for operators to approach lifting equipment or material piles. This avoids safety risks such as falling objects from heights and allows for precise control of the grab's opening and closing angle and gripping force via a handle. Compared to traditional manually assisted or fixed-operation grabs, it significantly improves operational efficiency, allowing a single person to complete the entire process of material grabbing and transfer, reducing labor costs. It is also compatible with various equipment such as cranes and loaders, and can operate stably even in complex environments such as rain and dust. It is a key piece of equipment for cost reduction, efficiency improvement, and safety assurance in modern timber logistics.
[0003] Traditional timber grabs often use external stainless steel fuel tanks or have stainless steel fuel tanks of the same width installed at the bottom of the lower support beam. This limits the use of wireless remote-controlled timber grabs, making them unsuitable for loading and unloading cargo from small vessels and resulting in poor practicality. Summary of the Invention
[0004] To address the shortcomings of existing technologies, this invention provides a wirelessly remote-controlled compact hydraulic system for timber grabs, thereby resolving the problems mentioned in the background.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a compact hydraulic system for a wireless remote-controlled timber grab, comprising a lower support beam and a stainless steel oil tank welded and installed inside the lower support beam. Hydraulic cylinders are semi-embedded on both sides of the top of the lower support beam. A cylinder seat is provided at the connection between the hydraulic cylinder and the lower support beam. A hydraulic flange is detachably installed above the stainless steel oil tank at the top of the lower support beam via bolts. A remote-controlled solenoid valve and an air bladder are fixedly installed at the top of the lower support beam via the hydraulic flange. The air bladder is located inside the stainless steel oil tank. The stainless steel oil tank contains hydraulic oil. A dipstick and a filler port are also provided above the stainless steel oil tank. A protective cover is fixedly installed above the lower support beam outside the remote-controlled solenoid valve and the hydraulic flange. A return oil pipe is provided between the stainless steel oil tank and the hydraulic cylinders. A transition pipe is connected to the outside of the remote-controlled solenoid valve. A tee is connected to the end of the transition pipe away from the remote-controlled solenoid valve. A high-pressure oil pipe is provided at the end of the tee away from the transition pipe, and the high-pressure oil pipe is connected to the hydraulic cylinder.
[0006] Preferably, two identical hydraulic cylinders are provided, and the two hydraulic cylinders are symmetrically distributed about the axis of the lower bearing beam, with the lower part of the hydraulic cylinder semi-embedded and installed inside the lower bearing beam.
[0007] With the above technical solution, the two hydraulic cylinders are symmetrically distributed around the axis of the lower support beam, which can ensure that the force on both sides is balanced when the grab grabs the wood, avoiding the grab bucket being unbalanced and the wood falling off due to excessive force on one side. At the same time, the lower part of the cylinder is semi-embedded in the inner side of the lower support beam, which can make full use of the internal space of the lower support beam, reduce the space occupied by the cylinder, further fit the core design of "compact", and reduce the risk of collision damage to the exposed part of the cylinder.
[0008] Preferably, the stainless steel oil tank is located inside the lower support beam, the stainless steel oil tank has an upper large and lower small structure, and the height of the stainless steel oil tank is the same as the height of the lower support beam.
[0009] By integrating the stainless steel oil tank into the inner side of the lower support beam through the above technical solution, there is no need to set up an additional independent oil tank installation space, which greatly reduces the overall volume of the system. The "larger at the top and smaller at the bottom" structural design of the oil tank ensures that the upper part has sufficient oil storage capacity to meet the oil supply needs of the hydraulic cylinder reciprocating motion, while the lower part can adapt to the narrow space inside the lower support beam, maximizing space utilization. The height of the oil tank is the same as the height of the lower support beam, which can prevent the oil tank from protruding from the surface of the lower support beam and reduce interference with wood or other components during operation.
[0010] Preferably, the transition pipe passes through the protective cover and extends to the outside of the protective cover, the tee is also located on the outside of the protective cover, two identical high-pressure oil pipes are provided, and the two high-pressure oil pipes are symmetrically distributed on both sides of the high-pressure oil pipe, the high-pressure oil pipe is connected to the oil inlet of the stainless steel oil tank, and the return oil pipe is connected to the oil outlet of the stainless steel oil tank.
[0011] Through the above technical solution, the transition pipe extends through the protective cover to the outside and connects to the external tee, which can avoid the direct superposition of core components such as remote control solenoid valves and hydraulic flanges with the tee and high-pressure oil pipes. This facilitates the later inspection and replacement of the tee interface and high-pressure oil pipes. The operation can be carried out without disassembling the protective cover. The two high-pressure oil pipes are symmetrically distributed and connected to the hydraulic cylinders respectively, which can ensure that the oil flow of the cylinders on both sides is consistent, realize the synchronous opening and closing of the grab bucket, and improve the stability of operation.
[0012] Preferably, there are two identical filler ports, which are symmetrically distributed on both sides of the lower part of the tee.
[0013] The above technical solution enables symmetrically distributed fuel inlets to achieve simultaneous fuel injection from two fuel nozzles, improving the system's fuel replenishment efficiency.
[0014] Preferably, the piston rod of the hydraulic cylinder is provided with a combined sealing structure at the joint between the piston rod and the cylinder body. The combined sealing structure consists of a polyurethane guide ring, a nitrile rubber main sealing ring, and a polytetrafluoroethylene retaining ring, which are sequentially fitted together.
[0015] Through the above technical solutions, the urethane guide ring can accurately guide the reciprocating motion of the piston rod, preventing piston rod misalignment and cylinder wear. The nitrile rubber main sealing ring, with its excellent elasticity and sealing performance, can effectively block hydraulic oil leakage from the gap between the piston rod and the cylinder, ensuring stable cylinder pressure. The PTFE retaining ring can prevent sawdust, dust and other impurities from directly contacting the main sealing ring, while also preventing the main sealing ring from being squeezed and deformed during piston rod reciprocation, significantly extending the service life of the sealing structure and adapting to the harsh environment of dust and impurities during timber grab operations.
[0016] Compared with the prior art, this utility model provides a compact hydraulic system for wirelessly remote-controlled timber grabs, which has the following advantages: 1. This wireless remote-controlled timber grab's compact hydraulic system features a stainless steel oil tank, remote-controlled solenoid valve, return oil pipe, transition pipe, tee, high-pressure oil pipe, and hydraulic cylinder. The stainless steel oil tank is integrated into the lower support beam, eliminating the need for a separate oil tank installation space and significantly reducing the overall system size. This prevents the stainless steel oil tank from protruding from the lower support beam surface, reducing interference with timber or other components during operation. It is suitable for grabbing cargo from small vessels. Two symmetrically distributed high-pressure oil pipes connect to the hydraulic cylinders, ensuring consistent oil flow on both sides and enabling synchronous opening and closing of the grab, improving operational stability. Symmetrically distributed refueling ports allow for simultaneous oil injection from both nozzles, improving system refueling efficiency. The overall design is reasonable, compact, and easy to maintain. Attached Figure Description
[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the half-section structure of this utility model; Figure 3 This is a schematic diagram of the high-pressure oil pipe installation structure of this utility model; Figure 4 This is a schematic diagram of the installation structure of the stainless steel oil tank of this utility model.
[0018] The components include: 1. Lower bearing beam; 2. Cylinder seat; 3. Hydraulic cylinder; 4. Remote control solenoid valve; 5. Hydraulic flange; 6. Airbag; 7. Oil dipstick; 8. Stainless steel oil tank; 9. Hydraulic oil; 10. Return oil pipe; 11. Protective cover; 12. Transition pipe; 13. Tee; 14. High-pressure oil pipe; 15. Filler port. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] Example 1: like Figure 1-4As shown, this utility model provides a compact hydraulic system for a wireless remote-controlled timber grab, including a lower support beam 1 and a stainless steel oil tank 8 welded and installed inside the lower support beam 1. Hydraulic cylinders 3 are semi-embedded on both sides of the top of the lower support beam 1. A cylinder seat 2 is provided at the connection between the hydraulic cylinders 3 and the lower support beam 1. A hydraulic flange 5 is detachably installed above the stainless steel oil tank 8 at the top of the lower support beam 1 via bolts. A remote-controlled solenoid valve 4 and an airbag 6 are fixedly installed at the top of the lower support beam 1 via the hydraulic flange 5. The airbag 6 is located inside the stainless steel oil tank 8. The stainless steel oil tank 8 contains hydraulic oil 9. Above the stainless steel oil tank 8, there is also an oil dipstick 7 and an oil filler port 15. Above the lower support beam 1, a protective cover 11 is fixedly installed on the outside of the remote control solenoid valve 4 and the hydraulic flange 5. A return oil pipe 10 is provided between the stainless steel oil tank 8 and the hydraulic cylinder 3. A transition pipe 12 is installed on the outside of the remote control solenoid valve 4. A tee 13 is installed on the end of the transition pipe 12 away from the remote control solenoid valve 4. A high-pressure oil pipe 14 is provided on the end of the tee 13 away from the transition pipe 12. The high-pressure oil pipe 14 is connected to the hydraulic cylinder 3.
[0021] Example 2: like Figure 2-4 As shown, as an improvement to the previous embodiment, the hydraulic cylinder occupies external space.
[0022] Specifically, two identical hydraulic cylinders 3 are provided, and the two hydraulic cylinders 3 are symmetrically distributed about the axis of the lower support beam 1. The lower part of the hydraulic cylinder 3 is semi-embedded and installed inside the lower support beam 1. The advantage is that the two hydraulic cylinders 3 are symmetrically distributed about the axis of the lower support beam 1, which ensures that the force on both sides is balanced when the grab bucket grabs the wood, avoiding the grab bucket being unbalanced and the wood falling off due to excessive force on one side. At the same time, the lower part of the cylinder is semi-embedded and installed inside the lower support beam 1, which can make full use of the internal space of the lower support beam 1, reduce the space occupied by the cylinder, further fit the "compact" design core of the system, and reduce the risk of collision damage to the exposed part of the cylinder.
[0023] Specifically, the stainless steel oil tank 8 is located inside the lower support beam 1. The stainless steel oil tank 8 has a larger upper section and a smaller lower section, and its height is the same as that of the lower support beam 1. The advantage is that by integrating the stainless steel oil tank 8 inside the lower support beam 1, there is no need to set up an additional independent oil tank installation space, which greatly reduces the overall volume of the system. The "larger upper section and smaller lower section" structural design of the oil tank ensures that there is enough oil storage capacity in the upper part to meet the oil supply needs of the hydraulic cylinder 3 reciprocating motion, while also allowing the lower part to fit into the narrow space inside the lower support beam 1, maximizing space utilization. The fact that the height of the oil tank is the same as the height of the lower support beam 1 can prevent the stainless steel oil tank from protruding from the surface of the lower support beam 1, reducing interference with wood or other components during operation.
[0024] Example 3: like Figure 2As shown in Figure 5, as an improvement to the previous embodiment, this is done to enhance operational stability.
[0025] Specifically, the transition pipe 12 passes through the protective cover 11 and extends to the outside of the protective cover 11. The tee 13 is also located on the outside of the protective cover 11. Two identical high-pressure oil pipes 14 are provided, and the two high-pressure oil pipes 14 are symmetrically distributed on both sides of the high-pressure oil pipe 14. The high-pressure oil pipe 14 is connected to the oil inlet of the stainless steel oil tank 8, and the return oil pipe 10 is connected to the oil outlet of the stainless steel oil tank 8. The advantage is that the transition pipe 12 passes through the protective cover 11 and extends to the outside to connect with the external tee 13, which avoids the direct superposition of core components such as the remote control solenoid valve 4 and the hydraulic flange 5 with the tee 13 and the high-pressure oil pipe 14. This facilitates the later maintenance and replacement of the tee 13 interface and the high-pressure oil pipe 14 without disassembling the protective cover 11. The two high-pressure oil pipes 14 are symmetrically distributed and connected to the hydraulic cylinders 3 respectively, which can ensure that the oil flow of the cylinders on both sides is consistent, realize the synchronous opening and closing of the grab bucket, and improve the stability of operation.
[0026] Specifically, there are two identical filler ports 15, symmetrically distributed on both sides of the lower part of the tee 13. The advantage is that the symmetrically distributed filler ports 15 enable simultaneous filling of oil by both oil nozzles, improving the system's oil replenishment efficiency.
[0027] Example 4: like Figure 2 As shown in Figure 5, as an improvement to the previous embodiment, the service life of the grab bucket device is increased.
[0028] Specifically, the piston rod of hydraulic cylinder 3 is fitted with a combined sealing structure at the joint between the piston rod and the cylinder body. This combined sealing structure consists of a polyurethane guide ring, a nitrile rubber main sealing ring, and a polytetrafluoroethylene (PTFE) retaining ring, all sequentially fitted together. The advantages are: the polyurethane guide ring provides precise guidance for the reciprocating motion of the piston rod, preventing piston rod misalignment and cylinder body wear; the nitrile rubber main sealing ring, with its excellent elasticity and sealing properties, effectively prevents hydraulic oil leakage 9 from the gap between the piston rod and the cylinder body, ensuring stable cylinder pressure; and the PTFE retaining ring prevents sawdust, dust, and other impurities from directly contacting the main sealing ring, while also preventing the main sealing ring from being deformed by compression during piston rod reciprocation, significantly extending the service life of the sealing structure and adapting to the harsh environment of dusty and impurity-rich conditions during timber grabbing operations.
[0029] Working principle: First, the hydraulic oil level 9 in the stainless steel oil tank 8 is observed through the dipstick 7. If the level is insufficient, two symmetrically distributed filling ports 15 can be used to simultaneously replenish oil with dual oil guns. The stainless steel oil tank 8 has a "larger at the top and smaller at the bottom" structure, which is consistent with the height of the lower support beam 1. This avoids interference with the wood during operation and ensures sufficient oil storage. The internal air bladder 6 can also compensate for pressure fluctuations with the oil level to prevent negative pressure from affecting the oil supply. When the grab grabs the wood, the remote control solenoid valve 4 fixed on the hydraulic flange 5 is in a normally closed state. The upper chamber of the hydraulic cylinder 3 is kept under pressure lock through the high-pressure oil pipe 14 and the tee 13. The piston rod extends under the action of hydraulic oil 9. The combined sealing structure at the joint can guide and prevent wear and prevent leakage of impurities, ensuring the grab grab's stability. When the force is balanced and the system is closed, the wireless remote control energizes the coil of the remote control solenoid valve 4 to conduct during the unloading of timber. The hydraulic oil 9 in the upper chamber of the hydraulic cylinder 3 flows back to the stainless steel oil tank 8 through the high-pressure oil pipe 14, the tee 13, the transition pipe 12, the remote control solenoid valve 4, and the return oil pipe 10 under the weight of the grab bucket and the load. The symmetrical high-pressure oil pipe 14 ensures that the piston rod retracts synchronously. The air bag 6 adjusts the pressure as the oil level rises to prevent excessive pressure, so as to achieve a smooth opening of the grab bucket. After the timber is unloaded, the remote control command is disconnected, the remote control solenoid valve 4 is de-energized and reset to its normal closed state, the pressure in the upper chamber of the hydraulic cylinder 3 is locked again, and the piston rod resumes extension and standby. At this time, the oil level can be checked again through the dipstick 7. If oil needs to be added, it can be done through the oil filler port 15. The system waits for the next grab.
[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A compact hydraulic system for a wirelessly remote-controlled timber grab, comprising a lower support beam (1) and a stainless steel oil tank (8) welded and installed inside the lower support beam (1), characterized in that: Hydraulic cylinders (3) are semi-embedded on both sides of the top of the lower support beam (1). A cylinder seat (2) is provided at the connection between the hydraulic cylinder (3) and the lower support beam (1). A hydraulic flange (5) is detachably installed on the top of the lower support beam (1) above the stainless steel oil tank (8) by bolts. A remote control solenoid valve (4) and an air bag (6) are fixedly installed on the top of the lower support beam (1) by the hydraulic flange (5). The air bag (6) is located inside the stainless steel oil tank (8). The stainless steel oil tank (8) contains hydraulic oil (9). An oil dipstick is also provided above the stainless steel oil tank (8). 7) and the oil filling port (15), a protective cover (11) is fixedly installed on the outside of the remote control solenoid valve (4) and the hydraulic flange (5) above the lower support beam (1), a return oil pipe (10) is provided between the stainless steel oil tank (8) and the hydraulic cylinder (3), a transition pipe (12) is installed on the outside of the remote control solenoid valve (4), a tee (13) is installed on the end of the transition pipe (12) away from the remote control solenoid valve (4), a high pressure oil pipe (14) is provided on the end of the tee (13) away from the transition pipe (12), and the high pressure oil pipe (14) is connected to the hydraulic cylinder (3).
2. The compact hydraulic system for a wirelessly controlled timber grab according to claim 1, characterized in that: Two identical hydraulic cylinders (3) are provided, and the two hydraulic cylinders (3) are symmetrically distributed about the axis of the lower bearing beam (1). The lower part of the hydraulic cylinder (3) is semi-embedded and installed inside the lower bearing beam (1).
3. The compact hydraulic system for a wirelessly controlled timber grab according to claim 1, characterized in that: The stainless steel oil tank (8) is located inside the lower support beam (1). The stainless steel oil tank (8) has an upper large and lower small structure. The height of the stainless steel oil tank (8) is the same as the height of the lower support beam (1).
4. The compact hydraulic system for a wirelessly controlled timber grab according to claim 1, characterized in that: The transition pipe (12) passes through the protective cover (11) and extends to the outside of the protective cover (11). The tee (13) is also located outside the protective cover (11). There are two identical high-pressure oil pipes (14), and the two high-pressure oil pipes (14) are symmetrically distributed on both sides of the high-pressure oil pipe (14). The high-pressure oil pipe (14) is connected to the oil inlet of the stainless steel oil tank (8), and the return oil pipe (10) is connected to the oil outlet of the stainless steel oil tank (8).
5. The compact hydraulic system for a wirelessly controlled timber grab according to claim 1, characterized in that: The filler port (15) has two identical ports, which are symmetrically distributed on both sides of the lower part of the tee (13).
6. The compact hydraulic system for a wirelessly remote-controlled timber grab according to claim 1, characterized in that: The piston rod of the hydraulic cylinder (3) is provided with a combined sealing structure at the joint between the piston rod and the cylinder body.