A kind of safety tooling for travel limit of dock crane

Abstract

The present invention discloses a dock crane travel limit safety tooling, comprising an anti-collision component installed on the dock crane door leg and a limit tooling installed on the dock crane track, the anti-collision component comprising a mounting rod and a connecting plate fixedly installed on one side of the mounting rod, a telescopic outer cylinder fixedly installed on the bottom end of the mounting rod, a telescopic rod slidably installed inside the telescopic outer cylinder, one end of the telescopic rod is fixedly connected with a first spring and an anti-collision rod, and the anti-collision rod is located on the inner side of the first spring, and a limit switch is arranged on one side of the connecting plate; the present invention installs an anti-collision rod that can be telescoped after a collision and an electrically controlled limit switch on the dock crane door leg, the signal of the limit switch is connected to the dock crane electrical control circuit, when the anti-collision rod is displaced, the limit switch is dynamically disconnected, the dock crane stops walking, and the travel limit function is achieved, so that the tooling has high reliability, has little impact on the dock crane when a collision occurs, and can avoid damage to the dock crane.

Description

Technical Field

[0001] The invention relates to the technical field of ship repair and lifting operation projects, in particular to a dock crane travel limit safety tooling. Background Art

[0002] During the dock repair process in a shipyard, there is a movable gantry crane (referred to as dock crane) on the wall of the floating dock for lifting and hoisting operations. In actual use, the boarding ladder on the dock crane track will affect the movement of the dock crane. To ensure safety, a travel limit tooling will be installed on the tracks on both sides of the boarding ladder to prevent the dock crane from colliding with the boarding ladder during movement.

[0003] However, the conventional travel limiter installed on the track relies on a mechanical device to limit the travel of the dock crane, and has the problem of poor reliability. After the travel limiter collides with the dock crane, the travel rollers of the dock crane are severely damaged. Summary of the invention

[0004] The purpose of the present invention is to provide a dock crane travel limit safety tooling to solve the problem that the conventional travel limiter installed on the track relies on a mechanical device to limit the travel of the dock crane, which has poor reliability and causes serious damage to the travel rollers of the dock crane after the travel limiter collides with the dock crane.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a dock crane travel limit safety tooling, comprising an anti-collision assembly installed on the dock crane door leg and a limit tooling installed on the dock crane track, the anti-collision assembly comprising a mounting rod and a connecting plate fixedly installed on one side of the mounting rod, a telescopic outer cylinder fixedly installed on the bottom end of the mounting rod, a telescopic rod slidably installed inside the telescopic outer cylinder, one end of the telescopic rod fixedly connected to a first spring and an anti-collision rod, and the anti-collision rod is located inside the first spring, and a limit switch is arranged on one side of the connecting plate;

[0006] Wherein, the limit switch is electrically connected to the electrical control circuit of the dock crane.

[0007] Preferably, the limiting fixture comprises a U-shaped clamping plate, a support rod is fixedly connected to the top end of the U-shaped clamping plate, a sliding sleeve is externally sleeved on the support rod, and a limiting baffle is fixedly mounted on one side of the sliding sleeve via a support rod.

[0008] Preferably, a plurality of ball chambers are arranged side by side from top to bottom on both sides of the inner wall of the U-shaped pallet, balls are arranged inside the ball chambers, a pressing plate is arranged outside the U-shaped pallet, and a plurality of locking holes are arranged side by side from top to bottom on both sides of the inner wall of the pressing plate.

[0009] Preferably, a plurality of second springs are fixedly installed between the top end of the U-shaped clamping plate and the bottom end of the pressing plate.

[0010] Preferably, a rubber pad is adhered to the top surface of the pressing plate.

[0011] Preferably, the outer wall surface of the support rod is provided with scale markings.

[0012] Preferably, one end of the anti-collision rod away from the telescopic rod extends to the outside of the telescopic outer tube and is fixedly mounted with a contact plate, and a shaft sleeve is fixedly mounted at the connection between the anti-collision rod and the telescopic outer tube.

[0013] Preferably, the contact plate is made of rubber material.

[0014] Preferably, the telescopic rod is at the same height as the limiting baffle.

[0015] Preferably, the inner diameter of the ball chamber opening is smaller than the diameter of the ball.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention installs an anti-collision rod which can be retracted after a collision and an electrically controlled limit switch on the door leg of the dock crane. The signal of the limit switch is connected to the electrical control circuit of the dock crane. When the anti-collision rod is displaced, the limit switch is automatically disconnected, and the dock crane stops moving, thereby achieving the effect of travel limit. The tooling has high reliability, has little impact on the dock crane when a collision occurs, and can avoid damage to the dock crane. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of a dock crane travel limit safety tooling of the present invention;

[0019] Figure 2 It is a schematic diagram of the limit tooling structure of a dock crane travel limit safety tooling of the present invention;

[0020] Figure 3 It is a schematic structural diagram of an anti-collision component of a dock crane travel limit safety tooling of the present invention;

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure of a U-shaped pallet of a dock crane travel limit safety tooling of the present invention;

[0022] Figure 5 The present invention is a schematic diagram of a pressing plate structure of a dock crane travel limiting safety tooling.

[0023] In the figure: 10-anti-collision assembly; 11-mounting rod; 12-connecting plate; 13-limit switch; 14-telescopic outer cylinder; 15-first spring; 16-telescopic rod; 17-anti-collision rod; 18-contact plate; 20-limit tooling; 21-U-shaped clamping plate; 211-ball chamber; 212-ball; 22-support rod; 23-pressing plate; 231-locking hole; 232-rubber pad; 24-sliding sleeve; 25-limit baffle; 26-scale mark; 27-second spring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Embodiment 1:

[0026] See also Figure 1-3 The present invention provides a technical solution: a dock crane travel limit safety tooling, comprising an anti-collision component 10 installed on the dock crane door leg and a limit tooling 20 installed on the dock crane track, the anti-collision component 10 comprises a mounting rod 11 and a connecting plate 12 fixedly installed on one side of the mounting rod 11, the mounting rod 11 is fixedly installed on the dock crane door leg by bolts, a telescopic outer cylinder 14 is fixedly installed on the bottom end of the mounting rod 11, a telescopic rod 16 is slidably installed inside the telescopic outer cylinder 14, one end of the telescopic rod 16 is fixedly connected with a first spring 15 and an anti-collision rod 17, and the anti-collision rod 17 is located on the inner side of the first spring 15, and the other end of the first spring 15 is fixedly connected to the telescopic outer cylinder 14, a limit switch 13 is fixedly installed on one side of the connecting plate 12 by screws, the limit switch 13 and the anti-collision rod 17 are on the horizontal line, so that the anti-collision rod 17 can contact the limit switch 13 when it is telescoped. In addition, according to an embodiment of the present invention, the travel switch (also known as the limit switch) is a commonly used small current main control electrical appliance, which uses the collision of the moving parts of the production machinery to make its contacts move to connect or disconnect the control circuit to achieve a certain control purpose. The model of the limit switch 13 is YBLX-ME-8108.

[0027] Furthermore, when the dock crane reaches the limit tooling 20 during its movement, the telescopic rod 16 on the door leg of the dock crane hits the limit baffle 25 on the limit tooling 20, and the telescopic rod 16 telescopes inward, while being able to compress the first spring 15, and can also drive the anti-collision rod 17 to move toward the limit switch 13, and the anti-collision rod 17 touches the electrically controlled limit switch 13. After the limit switch 13 is disconnected, the dock crane automatically stops moving, achieving the effect of walking limit, and when the dock crane moves to the other side, the telescopic rod 16 will leave the limit baffle 25, and the telescopic rod 16 can be reset under the elastic force of the first spring 15, and at the same time, the anti-collision rod 17 can also leave the limit switch 13, and the limit switch 13 is reset, and then the operation is resumed.

[0028] Among them, the limit switch 13 is electrically connected to the dock crane electrical control circuit.

[0029] In the preferred technical solution of this embodiment, the limiting tooling 20 includes a U-shaped card plate 21, which is clamped on the dock crane rail. A support rod 22 is fixedly connected to the top of the U-shaped card plate 21. A sliding sleeve 24 is sleeved on the outside of the support rod 22. A limiting baffle 25 is fixedly installed on one side of the sliding sleeve 24 through a support rod.

[0030] In summary of the above embodiments, the present invention installs an anti-collision rod which can be retracted after a collision and an electrically controlled limit switch on the door leg of the dock crane. The signal of the limit switch is connected to the electrical control circuit of the dock crane. When the anti-collision rod is displaced, the limit switch is automatically disconnected, and the dock crane stops moving, thereby achieving the effect of walking limit. This makes the tooling highly reliable, reduces the impact on the dock crane when a collision occurs, and can avoid damage to the dock crane.

[0031] Embodiment 2:

[0032] See also Figure 1-5The present invention provides a technical solution: a dock crane walking limit safety tooling, comprising an anti-collision component 10 installed on the dock crane door leg and a limit tooling 20 installed on the dock crane track, the anti-collision component 10 comprises a mounting rod 11 and a connecting plate 12 fixedly installed on one side of the mounting rod 11, the mounting rod 11 is fixedly installed on the dock crane door leg by bolts, a telescopic outer cylinder 14 is fixedly installed on the bottom end of the mounting rod 11, a telescopic rod 16 is slidably installed inside the telescopic outer cylinder 14, one end of the telescopic rod 16 is fixedly connected with a first spring 15 and an anti-collision rod 17, and the anti-collision rod 17 is located on the inner side of the first spring 15, the design of the first spring 15 enables the anti-collision rod 17 to automatically reset without manual reset, the other end of the first spring 15 is fixedly connected to the telescopic outer cylinder 14, a limit switch 13 is fixedly installed on one side of the connecting plate 12 by screws, the limit switch 13 and the anti-collision rod 17 are on the horizontal line, so that the anti-collision rod 17 can contact the limit switch 13 when it is telescoped. In addition, according to an embodiment of the present invention, a travel switch (also known as a limit switch) is a commonly used small current master electrical appliance that uses the collision of mechanical moving parts to move its contacts to connect or disconnect the control circuit to achieve a certain control purpose.

[0033] Furthermore, when the dock crane reaches the limit tooling 20 during its movement, the telescopic rod 16 on the door leg of the dock crane hits the limit baffle 25 on the limit tooling 20, and the telescopic rod 16 telescopes inward, while being able to compress the first spring 15, and can also drive the anti-collision rod 17 to move toward the limit switch 13, and the anti-collision rod 17 touches the electrically controlled limit switch 13. After the limit switch 13 is disconnected, the dock crane automatically stops moving, achieving the effect of walking limit, and when the dock crane moves to the other side, the telescopic rod 16 will leave the limit baffle 25, and the telescopic rod 16 can be reset under the elastic force of the first spring 15, and at the same time, the anti-collision rod 17 can also leave the limit switch 13, and the limit switch 13 is reset, and then the operation is resumed.

[0034] Among them, the limit switch 13 is electrically connected to the dock crane electrical control circuit.

[0035] In the preferred technical solution of the present embodiment, the limiting tooling 20 includes a U-shaped card plate 21, which is clamped on the dock crane rail. A support rod 22 is fixedly connected to the top of the U-shaped card plate 21. The support rod 22 has a Z-shaped structure, so that the U-shaped card plate 21 and the limiting baffle 25 are not on the same vertical axis. A sliding sleeve 24 is provided on the outside of the support rod 22, and the limiting baffle 25 is fixedly installed on one side of the sliding sleeve 24 through a support rod. After the installation is completed, the limiting baffle 25 and the telescopic rod 16 are at the same height, so the telescopic rod 16 can contact the limiting baffle 25 only when moving, and the telescopic rod 16 is at the same height as the limiting baffle 25.

[0036] In the preferred technical solution of this embodiment, a plurality of ball chambers 211 are arranged side by side from top to bottom on both sides of the inner wall of the U-shaped card plate 21, and balls 212 are rollingly installed inside the ball chambers 211, and the balls 212 can roll arbitrarily in the ball chambers 211. A pressing plate 23 is slidingly installed outside the U-shaped card plate 21, and a through hole for the support rod 22 to pass through is opened on the surface of the pressing plate 23, so that the pressing plate 23 can move up and down along the outside of the support rod 22, thereby improving the stability of the movement of the pressing plate 23. In addition, according to an embodiment of the present invention, a rubber pad 232 is adhered to the top surface of the pressing plate 23, which can improve the softness of the top of the pressing plate 23, so that when the hand presses on the pressing plate 23, the comfort is improved. The pressing plate 23 can move along the outer wall of the U-shaped clamping plate 21. A number of locking holes 231 are arranged side by side from top to bottom on both sides of the inner wall of the pressing plate 23. The locking holes 231 are adapted to the balls 212. A number of second springs 27 are fixedly installed between the top end of the U-shaped clamping plate 21 and the bottom end of the pressing plate 23.

[0037] Furthermore, when installing the limiting tool 20, it is only necessary to align the U-shaped card plate 21 with the dock crane track, and then press the pressing plate 23 downward, so that the pressing plate 23 moves downward and the second spring 27 is compressed at the same time. After the bottom end of the pressing plate 23 contacts the U-shaped card plate 21, the locking hole 231 on the inner wall of the pressing plate 23 corresponds to the ball chamber 211, so the ball 212 can enter the locking hole 231, so that the ball 212 loses the inner wall of the pressing plate 23. The squeezing force of the wall can also clamp the U-shaped clamping plate 21 into the dock crane rail, and then the pressing plate 23 is released. The pressing plate 23 can reset upward under the elastic force of the second spring 27, so that the locking hole 231 on the inner wall of the pressing plate 23 is staggered with the ball chamber 211. Therefore, the ball 212 can clamp the dock crane rail under the squeezing of the pressing plate 23, so that the U-shaped clamping plate 21 can be fixed on the dock crane rail. Compared with the traditional bolt fixing method, the convenience of installation is improved.

[0038] In a preferred technical solution of the present embodiment, a scale mark 26 is provided on the outer wall surface of the support rod 22 , through which the moving distance of the limit baffle 25 can be accurately known, so as to facilitate adjustment of the height of the limit baffle 25 .

[0039] In the preferred technical solution of the present embodiment, the anti-collision rod 17 extends from one end of the telescopic rod 16 to the outside of the telescopic outer tube 14 and is fixedly installed with a contact plate 18. The contact plate 18 is made of rubber material, so that the contact plate 18 has a certain elasticity, which can reduce the damage caused by the anti-collision rod 17 to the limit switch 13. A shaft sleeve is fixedly installed at the connection between the anti-collision rod 17 and the telescopic outer tube 14, which improves the sealing of the connection between the anti-collision rod 17 and the telescopic outer tube 14.

[0040] In a preferred technical solution of this embodiment, the inner diameter of the opening of the ball chamber 211 is smaller than the diameter of the ball 212 , which can effectively prevent the ball 212 from rolling out of the ball chamber 211 .

[0041] In the several embodiments provided by the present invention, it should be understood that the disclosed device can be implemented in other ways. The welding or threaded connection or winding connection shown or discussed can be completed with the assistance of equipment, such as welding with a welding gun, threaded connection with a wrench, etc. The materials of the device components are various, such as aluminum alloy, steel, copper and other metal materials, which are formed by casting or mechanical stamping.

[0042] The above description is only an implementation mode of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A safety tool for limiting the travel of a dock crane, comprising an anti-collision component (10) installed on a door leg of the dock crane and a limiting tool (20) installed on a track of the dock crane, characterized in that: The anti-collision assembly (10) comprises a mounting rod (11) and a connecting plate (12) fixedly mounted on one side of the mounting rod (11); a telescopic outer cylinder (14) is fixedly mounted on the bottom end of the mounting rod (11); a telescopic rod (16) is slidably mounted inside the telescopic outer cylinder (14); one end of the telescopic rod (16) is fixedly connected to a first spring (15) and an anti-collision rod (17); the anti-collision rod (17) is located on the inner side of the first spring (15); and a limit switch (13) is provided on one side of the connecting plate (12); Wherein, the limit switch (13) is electrically connected to the electrical control circuit of the dock crane; The position limiting tool (20) comprises a U-shaped card plate (21), the top of the U-shaped card plate (21) is fixedly connected to a support rod (22), the support rod (22) is sleeved with a sliding sleeve (24), one side of the sliding sleeve (24) is fixedly mounted with a position limiting baffle (25) via a support rod, a plurality of ball bearing cavities (211) are arranged side by side from top to bottom on both sides of the inner wall of the U-shaped card plate (21), balls (212) are arranged inside the ball bearing cavities (211), a pressing plate (23) is arranged outside the U-shaped card plate (21), a plurality of locking holes (231) are arranged side by side from top to bottom on both sides of the inner wall of the pressing plate (23), and a plurality of second springs (27) are fixedly mounted between the top of the U-shaped card plate (21) and the bottom of the pressing plate (23); When the limiting tool (20) is installed, the U-shaped card plate (21) is aligned with the dock crane rail, and then the pressing plate (23) is pressed downward, the pressing plate (23) moves downward, and the second spring (27) is compressed at the same time. After the bottom end of the pressing plate (23) contacts the U-shaped card plate (21), the locking hole (231) on the inner wall of the pressing plate (23) corresponds to the ball chamber (211), and the ball (212) enters the locking hole (231), so that the ball (212) loses its locking position. The squeezing force of the inner wall of the pressing plate (23) is removed, and the U-shaped clamping plate (21) is clamped into the dock crane track. Then, the pressing plate (23) is released, and the pressing plate (23) can be reset upward under the elastic force of the second spring (27), so that the locking hole (231) on the inner wall of the pressing plate (23) is staggered with the ball chamber (211). Therefore, the ball (212) can clamp the dock crane track under the squeezing of the pressing plate (23), thereby fixing the U-shaped clamping plate (21) on the dock crane track.

2. A dock crane travel limit safety tooling according to claim 1, characterized in that: A rubber pad (232) is adhered to the top surface of the pressing plate (23).

3. A dock crane travel limit safety tooling according to claim 1, characterized in that: The outer wall surface of the support rod (22) is provided with a scale mark (26).

4. A dock crane travel limit safety tooling according to claim 1, characterized in that: One end of the anti-collision rod (17) away from the telescopic rod (16) extends to the outside of the telescopic outer cylinder (14) and is fixedly mounted with a contact plate (18); a shaft sleeve is fixedly mounted at the connection between the anti-collision rod (17) and the telescopic outer cylinder (14).

5. A dock crane travel limit safety tooling according to claim 4, characterized in that: The contact plate (18) is specifically made of rubber material.

6. The dock crane travel limit safety tooling according to claim 1, characterized in that: The telescopic rod (16) is at the same height as the limit baffle (25).

7. The safety tooling for limiting the travel of a dock crane according to claim 1 is characterized by: The inner diameter of the opening of the ball chamber (211) is smaller than the diameter of the ball (212).

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