Rail clamping device oil cylinder for port crane electro-hydraulic braking

Abstract

The utility model relates to the technical field of cranes, and discloses a rail clamping device oil cylinder for electro-hydraulic braking of a port crane, which comprises a cylinder body and a piston rod, one end of the piston rod is arranged in the cylinder body, a first limiting rack is fixedly arranged on the rod wall of the piston rod, one end of the first limiting rack extends into the cylinder body, and the other end of the first limiting rack extends into the cylinder body. A fixing rod is fixedly arranged on the outer wall of the cylinder body, a shell is fixedly arranged at the tail end of the fixing rod, two elastic connecting rods are arranged in the shell in a leading-out mode, a same second limiting rack is fixedly arranged at the lower ends of the two connecting rods, and the first limiting rack and the second limiting rack are arranged in an engaged mode; and an electromagnetic adsorption mechanism connected with the two connecting rods is arranged in the shell. According to the utility model, a structure for limiting and protecting the piston rod is arranged, so that the piston rod cannot move at will even if the oil cylinder is in failure, the clamping effect with a rail is ensured, and the port crane can stably run.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a rail clamp oil cylinder for electro-hydraulic braking of port cranes. Background Technique

[0002] A rail clamp is a device clamped on a guide rail and is commonly used for fixing the position of a port crane.

[0003] The existing rail clamp is mainly driven by a hydraulic cylinder to connect the rail clamp with the track. However, it is found in the actual use process that: since there is no protective structure on the hydraulic cylinder, once the hydraulic cylinder fails, the piston rod of the hydraulic cylinder will move randomly, resulting in the inability to continue maintaining the clamping action. For this reason, a rail clamp oil cylinder for electro-hydraulic braking of port cranes is proposed. Content of the Utility Model

[0004] The purpose of the utility model is to solve the problem that the rail clamp oil cylinder in the prior art has no protective structure, and a rail clamp oil cylinder for electro-hydraulic braking of port cranes is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A rail clamp oil cylinder for electro-hydraulic braking of port cranes includes a cylinder block and a piston rod. One end of the piston rod is arranged inside the cylinder block. A first limiting rack is fixedly arranged on the rod wall of the piston rod, and one end of the first limiting rack extends into the cylinder block. A fixed rod is fixedly arranged on the outer wall of the cylinder block, and a housing is fixedly arranged at the end of the fixed rod. Two elastically arranged connecting rods are led out inside the housing. The same second limiting rack is fixedly arranged at the lower ends of the two connecting rods. The first limiting rack and the second limiting rack are meshed, and an electromagnetic adsorption mechanism connected with the two connecting rods is arranged inside the housing.

[0007] Preferably, the electromagnetic adsorption mechanism includes an electromagnetic block and a permanent magnet block. The upper ends of the two connecting rods are fixedly provided with the same connecting plate. The electromagnetic block is fixedly arranged on the inner wall of the top of the housing, and the permanent magnet block is fixedly arranged on the upper surface of the connecting plate. The electromagnetic block and the permanent magnet block are arranged in a position corresponding manner.

[0008] Preferably, springs are fixedly arranged on both sides of the upper surface of the connecting plate, and the upper ends of the two springs are fixedly connected with the inner wall of the top of the housing.

[0009] Preferably, the teeth of the first limiting rack and the teeth of the second limiting rack both adopt a right-angled triangle structure.

[0010] Preferably, a dust cover is provided at the connection between the cylinder block and the piston rod, and both the piston rod and the first limit rack pass through the inside of the dust cover.

[0011] Preferably, rotating sleeves are provided at the tail of the cylinder block and the front end of the piston rod.

[0012] Compared with the prior art, the present utility model provides a rail clamping cylinder for electro-hydraulic braking of a port crane, having the following beneficial effects:

[0013] 1. For the rail clamping cylinder for electro-hydraulic braking of the port crane, through the provided first limit rack, connecting rod and second limit rack, before the piston rod extends, by turning on the power supply of the electromagnetic adsorption mechanism, the connecting rod and the second limit rack move upward. After the piston rod completely extends out of the cylinder block, the power supply of the electromagnetic adsorption mechanism is disconnected. At this time, the connecting rod and the second limit rack move downward due to the action of elastic force, so that the first limit rack and the second limit rack are engaged. At this time, the position of the piston rod can be restricted, that is, even when the oil cylinder fails, the piston rod will not move randomly, ensuring the clamping effect with the track and enabling the port crane to operate stably.

[0014] 2. For the rail clamping cylinder for electro-hydraulic braking of the port crane, through the provided electromagnetic block and permanent magnet block, after the electromagnetic block is powered on, it generates a magnetic force, causing the electromagnetic block to adsorb the permanent magnet block and move upward, thereby enabling the connecting plate to drive the two connecting rods to move upward, and finally realizing the function of the second limit rack moving upward.

[0015] 3. For the rail clamping cylinder for electro-hydraulic braking of the port crane, through the provided spring, when the moving plate adsorbs and moves upward, it will compress the spring. When the power supply of the electromagnetic block is disconnected, at this time, the spring applies a downward elastic force to the connecting plate, causing the second limit rack to quickly move downward and stably engage with the first limit rack.

[0016] For the parts not involved in this device, they are the same as the prior art or can be implemented by using the prior art. The present utility model has a structure for limiting and protecting the piston rod. Even when the oil cylinder fails, the piston rod will not move randomly, ensuring the clamping effect with the track and enabling the port crane to operate stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a rail clamping cylinder for electro-hydraulic braking of a port crane proposed by the present utility model;

[0018] Figure 2 is Figure 1 a schematic structural diagram of the housing, connecting rod and second limit rack in

[0019] Figure 3 is Figure 1Side view of the dust cover

[0020] In the figure: 1, cylinder block; 2, piston rod; 3, first limit rack; 4, fixed rod; 5, housing; 6, connecting rod; 7, second limit rack; 8, electromagnetic block; 9, permanent magnet block; 10, connecting plate; 11, spring; 12, dust cover; 13, rotating sleeve Specific implementation mode

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments

[0022] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention

[0023] Embodiment 1

[0024] Referring to Figure 1 , a rail clamping cylinder for electro-hydraulic braking of a port crane includes a cylinder block 1 and a piston rod 2. One end of the piston rod 2 is arranged inside the cylinder block 1. A first limit rack 3 is fixedly arranged on the rod wall of the piston rod 2, and one end of the first limit rack 3 extends into the cylinder block 1. A fixed rod 4 is fixedly arranged on the outer wall of the cylinder block 1, and a housing 5 is fixedly arranged at the end of the fixed rod 4. Two elastically arranged connecting rods 6 are led out inside the housing 5. The lower ends of the two connecting rods 6 are fixedly provided with the same second limit rack 7. The first limit rack 3 and the second limit rack 7 are meshed. The teeth of the first limit rack 3 and the teeth of the second limit rack 7 both adopt a right triangle structure. An electromagnetic adsorption mechanism connected to the two connecting rods 6 is arranged inside the housing 5. Before the piston rod 2 extends out, by turning on the power supply of the electromagnetic adsorption mechanism, the connecting rod 6 and the second limit rack 7 move upward. After the piston rod 2 completely extends out of the cylinder block 1, the power supply of the electromagnetic adsorption mechanism is disconnected. At this time, the connecting rod 6 and the second limit rack 7 move downward due to the action of the elastic force, so that the first limit rack 3 and the second limit rack 7 are meshed. At this time, the position of the piston rod 2 can be restricted, that is, even when the oil cylinder fails, the piston rod 2 will not move randomly, ensuring the clamping effect with the track and enabling the port crane to operate smoothly

[0025] Embodiment 2

[0026] Referring to Figure 1-2, the electromagnetic adsorption mechanism includes an electromagnetic block 8 and a permanent magnet block 9. The upper ends of two connecting rods 6 are fixedly provided with the same connecting plate 10. The electromagnetic block 8 is fixedly arranged on the inner wall of the top of the housing 5, and the permanent magnet block 9 is fixedly arranged on the upper surface of the connecting plate 10. The electromagnetic block 8 and the permanent magnet block 9 are arranged in a position corresponding manner. After the electromagnetic block 8 is powered on, it generates a magnetic force, causing the electromagnetic block 8 to adsorb the permanent magnet block 9 and move upward, so that the connecting plate 10 can drive the two connecting rods 6 to move upward, and finally realize the function of the second limit rack 7 moving upward; both sides of the upper surface of the connecting plate 10 are fixedly provided with springs 11, and the upper ends of the two springs 11 are fixedly connected to the inner wall of the top of the housing 5. When the moving plate 10 adsorbs and moves upward, it will squeeze the springs 11. When the power supply of the electromagnetic block 8 is disconnected, at this time, the springs 11 apply a downward elastic force to the connecting plate 10, causing the second limit rack 7 to quickly move downward and stably engage with the first limit rack 3.

[0027] Embodiment 3

[0028] Referring to Figure 1 and 3 , a dust-proof sleeve 12 is provided at the connection between the cylinder block 1 and the piston rod 2. The piston rod 2 and the first limit rack 3 both pass through the inside of the dust-proof sleeve 12, and the dust-proof sleeve 12 can play a role in dust prevention; rotating sleeves 13 are provided at the tail of the cylinder block 1 and the front end of the piston rod 2, and both the cylinder block 1 and the piston rod 2 can rotate with the connection part through the rotating sleeves 13.

[0029] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A rail clamping cylinder for electro-hydraulic braking of a port crane, comprising a cylinder block (1) and a piston rod (2), characterized in that, One end of the piston rod (2) is arranged inside the cylinder block (1). A first limit rack (3) is fixedly arranged on the rod wall of the piston rod (2), and one end of the first limit rack (3) extends into the cylinder block (1). A fixed rod (4) is fixedly arranged on the outer wall of the cylinder block (1). A housing (5) is fixedly arranged at the end of the fixed rod (4). Two elastically arranged connecting rods (6) are led out inside the housing (5). The same second limit rack (7) is fixedly arranged at the lower ends of the two connecting rods (6). The first limit rack (3) and the second limit rack (7) are meshed. An electromagnetic adsorption mechanism connected to the two connecting rods (6) is arranged inside the housing (5).

2. The rail clamp cylinder for electro-hydraulic braking of a port crane according to claim 1, characterized in that, The electromagnetic adsorption mechanism includes an electromagnetic block (8) and a permanent magnet block (9). The same connecting plate (10) is fixedly arranged at the upper ends of the two connecting rods (6). The electromagnetic block (8) is fixedly arranged on the inner wall of the top of the housing (5). The permanent magnet block (9) is fixedly arranged on the upper surface of the connecting plate (10). The electromagnetic block (8) and the permanent magnet block (9) are arranged in a position corresponding manner.

3. The rail clamp cylinder for electro-hydraulic braking of a port crane according to claim 2, characterized in that, Springs (11) are fixedly arranged on both sides of the upper surface of the connecting plate (10). The upper ends of the two springs (11) are fixedly connected to the inner wall of the top of the housing (5).

4. The rail clamp cylinder for electro-hydraulic braking of a port crane according to claim 1, characterized in that, The teeth of the first limit rack (3) and the teeth of the second limit rack (7) both adopt a right triangle structure.

5. The rail clamp cylinder for electro-hydraulic braking of a port crane according to claim 1, characterized in that, A dust-proof sleeve (12) is arranged at the connection between the cylinder block (1) and the piston rod (2). The piston rod (2) and the first limit rack (3) both pass through the inside of the dust-proof sleeve (12).

6. The rail clamp oil cylinder for electro-hydraulic braking of a port crane according to claim 1, characterized in that, Rotating sleeves (13) are arranged at the tail of the cylinder block (1) and the front end of the piston rod (2).

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