Overhead Crane Tool Rotation Limit Device

Abstract

The utility model discloses a rotation limit device for a crane tool, which belongs to the field of crane equipment. Its pressure sensor, front limit block and rear limit block cooperate with the base limit block to limit respectively, and play the role of the first mechanical limit, and the structure is simple; when the base limit block is damaged, the hydraulic station motor contactor is disconnected through the travel switch, and then the hydraulic motor is disconnected in time, and the hydraulic station stops working to effectively protect the oil pipe gas line cable. It mainly includes a rotary column and a rotary base, the end surface of the rotary base is provided with a base limit block, the end surface of the rotary column is provided with a front limit block and a rear limit block, and the base limit block is located between the front limit block and the rear limit block; the end surface of the rotary base is also provided with a travel switch, and the end surface of the rotary column is provided with an induction sheet that cooperates with the travel switch; the front limit block and the rear limit block are both provided with a pressure sensor. The utility model is mainly used for the rotation limit of the crane tool.

Description

Technical Field

[0001] The utility model relates to the field of overhead crane equipment, in particular to a rotation limiting device for overhead crane tools. Background Art

[0002] At present, the tool rotation device of the multifunctional overhead crane relies on the end limit to stop at the mechanical gear. If the pressure sensor of the end limit fails, the tool rotation cannot be stopped. Due to the high pressure, the mechanical gear is damaged, causing the oil pipe, gas line and cable to be twisted and damaged, affecting the safe operation of the equipment. For example, a safety rotation limit mechanism of an overhead crane with announcement number CN207142664U uses a gear rotating cam structure for limit, which is not suitable for the tool rotation structure of the multifunctional overhead crane, and the hydraulic motor is not disconnected in time. Summary of the invention

[0003] The purpose of the utility model is to provide a slewing limit device for overhead crane tools, wherein the pressure sensor, the front limit block and the rear limit block cooperate with the base limit block respectively to limit, thus playing the role of the first mechanical limit and having a simple structure; when the base limit block is damaged, the hydraulic station motor contactor is disconnected by the travel switch, thereby disconnecting the hydraulic motor in time, and the hydraulic station stops working to effectively protect the oil pipe, gas line and cable; the base limit block is reinforced with an arc-shaped protrusion to reduce the probability of damage to the mechanical base limit block.

[0004] The utility model is realized by the following technical solutions:

[0005] A slewing limit device for overhead crane tools comprises a slewing column and a slewing base, wherein a base limit block is arranged on the end surface of the slewing base, a front limit block and a rear limit block are arranged on the end surface of the slewing column, and the base limit block is located between the front limit block and the rear limit block; a travel switch is also arranged on the end surface of the slewing base, and a sensing sheet cooperating with the travel switch is arranged on the end surface of the slewing column; pressure sensors are arranged on the front limit block and the rear limit block, and the pressure sensors detect the approaching base limit block, and the front limit block and the rear limit block cooperate with the base limit block for mechanical limiting.

[0006] Furthermore, the travel switch is connected to the hydraulic station motor contactor KM, and the hydraulic station motor contactor KM is connected to the hydraulic motor M.

[0007] Furthermore, the middle part of the base limit block is symmetrically provided with arc-shaped protrusions, the sides adjacent to the front limit block and the base limit block are provided with arc-shaped grooves, and the sides adjacent to the rear limit block and the base limit block are provided with arc-shaped grooves. The arc-shaped grooves cooperate with the arc-shaped protrusions. The arc-shaped protrusions symmetrically provided in the middle part of the base limit block can enhance the strength of the base limit block, while increasing the contact area during limiting, thereby improving the limiting effect.

[0008] Furthermore, the installation height of the travel switch is greater than the height of the front limit block.

[0009] Furthermore, the stroke between the base limit block and the front limit block is slightly smaller than the stroke between the travel switch and the induction sheet, so as to prevent the equipment from being unable to stop when a mechanical base limit block breaks.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] 1. The pressure sensor, the front limit block and the rear limit block cooperate with the base limit block to limit respectively, which plays the first mechanical limit and has a simple structure.

[0012] 2. The base limit block is damaged and the hydraulic station motor contactor is disconnected through the travel switch, thereby disconnecting the hydraulic motor in time and the hydraulic station stops working to effectively protect the oil pipe, gas line and cable.

[0013] 3. The base limit block is provided with an arc-shaped protrusion for structural reinforcement to reduce the probability of damage to the mechanical base limit block. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a circuit diagram of the utility model.

[0016] In the figure: 1. base limit block; 2. arc-shaped protrusion; 3. rotary base; 4. rear limit block; 5. arc-shaped groove; 6. travel switch; 7. front limit block; 8. induction plate; 9. rotary column; 10. pressure sensor. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings.

[0018] like Figure 1 As shown, embodiment 1, a slewing limit device for overhead crane tools, comprises a slewing column 9 and a slewing base 3, a base limit block 1 is provided on the end face of the slewing base 3, a front limit block 7 and a rear limit block 4 are provided on the end face of the slewing column 9, and the base limit block 1 is located between the front limit block 7 and the rear limit block 4; a travel switch 6 is also provided on the end face of the slewing base 3, and a sensing sheet 8 cooperating with the travel switch 6 is provided on the end face of the slewing column 9; pressure sensors 10 are provided on the front limit block 7 and the rear limit block 4, the pressure sensor 10 detects the approaching base limit block 1, and the front limit block 7 and the rear limit block 4 cooperate with the base limit block 1 for mechanical limiting.

[0019] Embodiment 2: A crown block tool rotation limit device, such as Figure 2As shown, the travel switch (SQ) 6 is connected to the hydraulic station motor contactor KM, and the hydraulic station motor contactor KM is connected to the hydraulic motor M; the middle part of the base limit block 1 is symmetrically provided with an arc-shaped protrusion 2, the front limit block 7 is provided with an arc-shaped groove 5 on the adjacent side of the base limit block 1, and the rear limit block 4 is provided with an arc-shaped groove 5 on the adjacent side of the base limit block 1, and the arc-shaped groove 5 cooperates with the arc-shaped protrusion 2, and the arc-shaped protrusion 2 symmetrically provided in the middle part of the base limit block 1 can strengthen the strength of the base limit block 1, and at the same time increase the contact area during limiting, thereby improving the limiting effect; the installation height of the travel switch 6 is greater than the height of the front limit block 7; the stroke between the base limit block 1 and the front limit block 7 is slightly smaller than the stroke between the travel switch 6 and the sensor plate 8, so as to prevent the equipment from being unable to stop when a mechanical base limit block 1 breaks, and the rest is the same as Example 1.

[0020] During normal operation, the pressure sensor 10 detects the base limit block 1, and then the front limit block 7 and the rear limit block 4 are mechanically limited. This is the prior art. When the pressure sensor 10 fails, the base limit block 1 will be damaged due to the increase in pressure. At this time, the travel switch 6 and the induction sheet 8 cooperate to sense, and the travel switch 6 cuts off the hydraulic station motor contactor KM, and the hydraulic station stops working to effectively protect the oil pipe gas line cable.

Claims

1. A slewing limit device for a crane tool, comprising a slewing column (9) and a slewing base (3), characterized in that: A base limit block (1) is provided on the end surface of the rotary base (3), a front limit block (7) and a rear limit block (4) are provided on the end surface of the rotary column (9), and the base limit block (1) is located between the front limit block (7) and the rear limit block (4); a travel switch (6) is also provided on the end surface of the rotary base (3), and a sensing sheet (8) cooperating with the travel switch (6) is provided on the end surface of the rotary column (9); pressure sensors (10) are provided on the front limit block (7) and the rear limit block (4), and the front limit block (7) and the rear limit block (4) cooperate with the base limit block (1) to perform mechanical limiting.

2. The crown block tool rotation limiting device according to claim 1 is characterized in that: The travel switch (6) is connected to the hydraulic station motor contactor KM, and the hydraulic station motor contactor KM is connected to the hydraulic motor M.

3. The crown block tool rotation limiting device according to claim 1 is characterized in that: The middle part of the base limit stop block (1) is symmetrically provided with an arc-shaped protrusion (2), the front limit block (7) is provided with an arc-shaped groove (5) on the side adjacent to the base limit stop block (1), and the rear limit block (4) is provided with an arc-shaped groove (5) on the side adjacent to the base limit stop block (1), and the arc-shaped groove (5) cooperates with the arc-shaped protrusion (2).

4. The overhead crane tool rotation limiting device according to claim 1 is characterized in that: The installation height of the travel switch (6) is greater than the height of the front limit block (7).

5. The overhead crane tool rotation limiting device according to claim 1 is characterized in that: The stroke between the base limit block (1) and the front limit block (7) is smaller than the stroke between the travel switch (6) and the induction sheet (8).

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