Double linkage hydraulic rotary wood clamp

Abstract

The utility model discloses a kind of double linkage hydraulic rotary wood clamps, including slewing bearing, upper connecting body and lower connecting body, lower connecting body hinged connection three-jawed clamp arm, first hydraulic cylinder, two-jawed clamp arm and second hydraulic cylinder, first hydraulic cylinder and second hydraulic cylinder are all provided with hydraulic lock. The state of first hydraulic cylinder and second hydraulic cylinder is controlled by hydraulic lock, so as to control the attitude of three-jawed clamp arm and two-jawed clamp arm, simultaneously with the function of emergency brake, when hydraulic system fails to cause oil to unable to push check valve in hydraulic lock, check valve in hydraulic lock is in closed state, the flow of oil is blocked, first hydraulic cylinder or second hydraulic cylinder is locked, so as to make three-jawed clamp arm or two-jawed clamp arm unable to move, guarantee the stability of three-jawed clamp arm or two-jawed clamp arm position, reliably clamp wood, avoid the occurrence of safety accident.

Description

Technical Field

[0001] This utility model belongs to the field of wood clamping technology, and in particular relates to a double-linkage hydraulic rotary wood clamp. Background Technology

[0002] Log grappling hooks are modified from hydraulic excavators and are mainly used to grab strip-shaped materials such as timber and lumber, thereby facilitating and quickly completing loading, unloading, and handling operations.

[0003] Existing log grippers all use hydraulic cylinders to drive the clamping arms to move, but they do not have an emergency braking function. When the hydraulic system malfunctions, the clamping force of the clamping arms disappears, and the logs cannot be reliably clamped. The logs are prone to falling between the two clamping arms, leading to safety accidents. Utility Model Content

[0004] To solve the above problems, this utility model provides a double-linkage hydraulic rotary wood clamp.

[0005] This utility model is implemented as follows: A double-linkage hydraulic rotary wood clamp includes a slewing bearing. An upper connecting body is fixedly mounted on the upper end of the slewing bearing, and a lower connecting body is mounted on the lower end of the slewing bearing. One end of the lower connecting body is hinged to a three-jaw clamping arm and a first hydraulic cylinder. The other end of the first hydraulic cylinder is hinged to the middle of the upper end of the three-jaw clamping arm. The extension and retraction of the first hydraulic cylinder moves the three-jaw clamping arm. The other end of the lower connecting body is hinged to a two-jaw clamping arm and a second hydraulic cylinder. The other end of the second hydraulic cylinder is hinged to the middle of the upper end of the two-jaw clamping arm. The extension and retraction of the second hydraulic cylinder moves the two-jaw clamping arm. Hydraulic locks are fixedly mounted on both the first and second hydraulic cylinders, and their states are controlled by these locks, thereby controlling the movement of the clamps. The posture of the three-jaw gripper and the two-jaw gripper is controlled. The upper connecting body is fixedly equipped with a solenoid valve and a hydraulic circuit block connected together. The solenoid valve controls the opening and closing of the hydraulic circuit in a timely manner, and the hydraulic circuit block gathers the corresponding dispersed hydraulic circuits. The first or second hydraulic cylinder, the hydraulic lock, the hydraulic circuit block and the solenoid valve are connected by oil pipes. When the oil flows normally through the hydraulic lock, it pushes the one-way valve core to open, and the oil flows in both directions. The first or second hydraulic cylinder can work normally, so that the three-jaw gripper or the two-jaw gripper can move normally. At the same time, it has an emergency braking function. When the hydraulic system fails and the oil cannot push the one-way valve in the hydraulic lock, the one-way valve in the hydraulic lock is in the closed state, blocking the flow of oil. The first or second hydraulic cylinder is locked, so that the three-jaw gripper or the two-jaw gripper cannot move.

[0006] Preferably, a hydraulic motor is vertically fixedly installed inside the upper connecting body, which has the advantages of small size, light weight, simple structure, good manufacturability, insensitivity to oil contamination, impact resistance and low inertia. It can also achieve forward and reverse rotation. The drive shaft of the hydraulic motor passes through the chassis of the upper connecting body and a first gear is fixedly installed on the drive shaft. A second gear that meshes with the first gear is horizontally installed at the middle position inside the slewing bearing. The hydraulic motor drives the second gear to rotate through the first gear. A shaft is vertically fixedly installed through the center hole of the second gear. The lower end of the shaft is fixedly connected to the top plate of the lower connecting body. When the second gear rotates, it drives the lower connecting body to rotate through the shaft. The upper end of the shaft passes through the chassis of the upper connecting body and a limit block is fixedly installed at the upper end of the shaft to limit the position of the second gear and the lower connecting body, ensuring the stability of the position of the second gear and the lower connecting body.

[0007] Preferably, a bearing is fixedly installed at the middle position of the upper connecting body chassis, and the upper end of the shaft passes through the center of the bearing to ensure that the shaft rotates smoothly.

[0008] Preferably, a linkage rod is provided between the upper outer walls of the three-jaw gripper and the two-jaw gripper, and the two ends of the linkage rod are hinged to the three-jaw gripper and the two-jaw gripper to ensure the synchronous opening and closing of the three-jaw gripper and the two-jaw gripper during operation.

[0009] Preferably, a hydraulic system synchronization valve is fixedly installed in the upper connecting body. The hydraulic system synchronization valve is connected to the first hydraulic cylinder and the second hydraulic cylinder simultaneously through pipelines, further ensuring the synchronous control of the first hydraulic cylinder and the second hydraulic cylinder, thereby realizing the precise clamping of the wood by the three-jaw clamping arm and the two-jaw clamping arm.

[0010] Preferably, the lower ends of the three-jaw clamping arms are staggered with the lower ends of the two-jaw clamping arms to ensure that the wood is clamped tightly.

[0011] The beneficial effects of this utility model are as follows: the state of the first and second hydraulic cylinders is controlled by a hydraulic lock, thereby controlling the posture of the three-jaw gripper and the two-jaw gripper. The first or second hydraulic cylinder, the hydraulic lock, the oil circuit block, and the solenoid valve are connected by oil pipes. When the oil flows normally through the hydraulic lock, it pushes the one-way valve core to open, allowing the oil to flow in both directions. The first or second hydraulic cylinder can work normally, thus enabling the three-jaw gripper or the two-jaw gripper to move normally. It also has an emergency braking function. When the hydraulic system malfunctions and the oil cannot push the one-way valve in the hydraulic lock, the one-way valve in the hydraulic lock is closed, blocking the flow of oil. The first or second hydraulic cylinder is locked, thus preventing the three-jaw gripper or the two-jaw gripper from moving, ensuring the stability of the position of the three-jaw gripper or the two-jaw gripper, reliably clamping the wood, and avoiding safety accidents. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the hydraulic circuit of this utility model; Figure 3 This is a schematic diagram of the structure of a hydraulic lock; Figure 4 This is a schematic diagram of the connection structure between the first gear and the second gear. In the diagram: 1. Slewing bearing; 2. Upper connecting body; 3. Lower connecting body; 4. Three-jaw gripper arm; 5. First hydraulic cylinder; 6. Two-jaw gripper arm; 7. Second hydraulic cylinder; 8. Hydraulic lock; 9. Solenoid valve; 10. Oil circuit block; 11. Hydraulic motor; 12. First gear; 13. Second gear; 14. Shaft; 15. Limit block; 16. Bearing; 17. Linkage rod. Detailed Implementation

[0013] To better understand the technical solution of this utility model, the following description, in conjunction with the accompanying drawings, further illustrates this utility model.

[0014] like Figure 1-4The illustrated double-linkage hydraulic rotary wood clamp includes a slewing bearing 1. An upper connecting body 2 is fixedly mounted on the upper end of the slewing bearing 1, and a lower connecting body 3 is mounted on the lower end of the slewing bearing 1. One end of the lower connecting body 3 is hinged to a three-jaw clamping arm 4 and a first hydraulic cylinder 5. The other end of the first hydraulic cylinder 5 is hinged to the middle of the upper end of the three-jaw clamping arm 4. The extension and retraction of the first hydraulic cylinder 5 moves the three-jaw clamping arm 4. The other end of the lower connecting body 3 is hinged to a two-jaw clamping arm 6 and a second hydraulic cylinder 7. The other end of the second hydraulic cylinder 7 is hinged to the middle of the upper end of the two-jaw clamping arm 6. The extension and retraction of the second hydraulic cylinder 7 moves the two-jaw clamping arm 6. The lower ends of the three-jaw clamping arm 4 and the lower ends of the two-jaw clamping arm 6 are staggered to ensure tight clamping of the wood. Hydraulic locks 8 are fixedly mounted on both the first hydraulic cylinder 5 and the second hydraulic cylinder 7, securing them together. The state is controlled to control the posture of the three-jaw gripper 4 and the two-jaw gripper 6. The upper connecting body 2 is fixedly equipped with a solenoid valve 9 and an oil circuit block 10 connected together. The solenoid valve 9 controls the opening and closing of the oil circuit in a timely manner, and the oil circuit block 10 gathers the corresponding dispersed hydraulic oil circuits. The first hydraulic cylinder 5 or the second hydraulic cylinder 7, the hydraulic lock 8, the oil circuit block 10 and the solenoid valve 9 are connected by oil pipes. When the oil flows normally through the hydraulic lock 8, it pushes the one-way valve core to open, and the oil flows in both directions. The first hydraulic cylinder 5 or the second hydraulic cylinder 7 can work normally, so that the three-jaw gripper 4 or the two-jaw gripper 6 can move normally. At the same time, it has an emergency braking function. When the hydraulic system fails and the oil cannot push the one-way valve in the hydraulic lock 8, the one-way valve in the hydraulic lock 8 is closed, blocking the flow of oil. The first hydraulic cylinder 5 or the second hydraulic cylinder 7 is locked, so that the three-jaw gripper 4 or the two-jaw gripper 6 cannot move.

[0015] A hydraulic motor 11 is vertically fixed inside the upper connecting body 2. It has advantages such as small size, light weight, simple structure, good manufacturability, insensitivity to oil contamination, impact resistance, and low inertia. It can also achieve forward and reverse rotation. The drive shaft of the hydraulic motor 11 passes through the chassis of the upper connecting body 2, and a first gear 12 is fixedly mounted on the drive shaft. A second gear 13, meshing with the first gear 12, is horizontally positioned at the center of the slewing bearing 1. The hydraulic motor 11 drives the second gear 13 to rotate via the first gear 12. A shaft 14 is vertically fixed in the center hole of the upper connecting body 2. The lower end of the shaft 14 is fixedly connected to the top plate of the lower connecting body 3. When the second gear 13 rotates, it drives the lower connecting body 3 to rotate through the shaft 14. A bearing 16 is fixedly installed in the middle of the chassis of the upper connecting body 2. The upper end of the shaft 14 passes through the center of the bearing 16 to ensure that the shaft 14 rotates smoothly. A limit block 15 is fixedly installed at the upper end of the shaft 14 to limit the position of the second gear 13 and the lower connecting body 3, ensuring the stability of the position of the second gear 13 and the lower connecting body 3.

[0016] A linkage rod 17 is provided between the upper outer walls of the three-jaw gripper 4 and the two-jaw gripper 6. The two ends of the linkage rod 17 are hinged to the three-jaw gripper 4 and the two-jaw gripper 6 to ensure synchronous opening and closing of the three-jaw gripper 4 and the two-jaw gripper 6 during operation. A hydraulic system synchronization valve is fixedly installed inside the upper connecting body 2. The hydraulic system synchronization valve is connected to the first hydraulic cylinder 5 and the second hydraulic cylinder 7 through pipelines to further ensure synchronous control of the first hydraulic cylinder 5 and the second hydraulic cylinder 7, thereby achieving precise clamping of the wood by the three-jaw gripper 4 and the two-jaw gripper 6.

[0017] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A double-linkage hydraulic rotary wood clamp, comprising a slewing bearing, an upper connecting body fixedly disposed at the upper end of the slewing bearing, and a lower connecting body disposed at the lower end of the slewing bearing; one end of the lower connecting body is simultaneously hinged to a three-jaw clamping arm and a first hydraulic cylinder, the other end of the first hydraulic cylinder being hinged to the middle position of the upper end of the three-jaw clamping arm; the other end of the lower connecting body is simultaneously hinged to a two-jaw clamping arm and a second hydraulic cylinder, the other end of the second hydraulic cylinder being hinged to the middle position of the upper end of the two-jaw clamping arm, characterized in that... Both the first and second hydraulic cylinders are fixedly equipped with hydraulic locks. The upper connecting body is fixedly equipped with a solenoid valve and an oil circuit block connected together. The first or second hydraulic cylinder, the hydraulic lock, the oil circuit block and the solenoid valve are connected through oil pipes.

2. A double linkage hydraulic rotary wood clamp according to claim 1, characterized in that, A hydraulic motor is vertically fixed inside the upper connecting body. The drive shaft of the hydraulic motor passes through the chassis of the upper connecting body and a first gear is fixedly mounted on the drive shaft. A second gear that meshes with the first gear is horizontally mounted at the middle position inside the slewing bearing. A shaft is vertically fixedly mounted through the center hole of the second gear. The lower end of the shaft is fixedly connected to the top plate of the lower connecting body, and the upper end of the shaft passes through the chassis of the upper connecting body and a limit block is fixedly mounted on the upper end of the shaft.

3. A double linkage hydraulic rotary wood clamp according to claim 2, wherein, A bearing is fixedly installed at the middle position of the upper connecting body chassis, and the upper end of the shaft passes through the center of the bearing.

4. The double linkage hydraulic rotary wood clamp of claim 1, wherein, A linkage rod is provided between the upper outer walls of the three-jaw clamping arm and the two-jaw clamping arm, and the three-jaw clamping arm and the two ends of the linkage rod are hinged together.

5. A double-linkage hydraulic rotary log clamp according to claim 1, characterized in that, The upper connecting body is fixedly equipped with a hydraulic system synchronization valve, which is connected to the first hydraulic cylinder and the second hydraulic cylinder simultaneously through pipelines.

6. A double linkage hydraulic rotary wood clamp according to claim 1, wherein, The lower ends of the three-jaw gripper and the two-jaw gripper are staggered.

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