Crane anti-skew lifting device and control circuit

Abstract

The present invention discloses a crane anti-skew and slant lifting device, comprising a frame body, on which a group of longitudinal axes and a group of transverse axes perpendicular to the longitudinal axes are fixedly mounted, baffles are movably mounted on each group of the longitudinal axes and transverse axes, compression springs are mounted on each group of the longitudinal axes and transverse axes close to the outer side of the baffles, and a proximity switch controlled by a control circuit is mounted on each of the four walls of the frame body, and the head of each proximity switch is aligned with the center position of four baffles respectively; the present invention is fixed to the outer shell of the crane electric hoist by welding the fixing plate of the frame body, so as to prevent the electric hoist from being skewed and slanted when the crane is in use.

Description

Technical Field

[0001] The invention relates to the technical field of steel structures, and in particular to a crane anti-skew pulling and slanting lifting device and a control circuit. Background Art

[0002] In production workshops, especially those for larger objects, cranes are widely used as the main tool for lifting and transporting in the workshops. Therefore, cranes are extremely important in terms of safety. According to statistics, in production workshops where cranes are used for lifting and transporting, safety accidents caused by crane use account for about 30% of the total accidents. Slanted lifting causes the crane to be in an abnormal working state, which may lead to the disorder of the crane wire rope, damage to the rope guide, jamming and damage to the electric hoist, and even serious consequences such as crane derailment. To this end, we propose a crane anti-slanting lifting device and control circuit. Summary of the invention

[0003] The purpose of the present invention is to overcome the above problems existing in the prior art and to provide a crane anti-skew pulling and slanting lifting device and a control circuit and a control circuit.

[0004] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0005] The anti-skew and slant lifting device for a crane comprises a frame body, on which a group of longitudinal axes and a group of transverse axes perpendicular to the longitudinal axes are fixedly mounted, baffles are movably mounted on each group of the longitudinal axes and transverse axes, and compression springs are mounted on the outer sides of the baffles on each group of the longitudinal axes and transverse axes, and a proximity switch controlled by a control circuit is mounted on each of the four walls of the frame body, and the head of each proximity switch is aligned with the center position of four baffles.

[0006] Furthermore, the transverse axis and the longitudinal axis are both fixed to the frame body through hexagonal nuts, and a C-grade flat washer is provided between the frame body and the hexagonal nuts.

[0007] Furthermore, the proximity switch is fixedly connected to the frame body via a hexagonal nut.

[0008] Furthermore, the baffle includes a plate body, and both ends of the plate body are provided with mounting parts that are integrally formed therewith and movably engaged with the longitudinal axis and the transverse axis.

[0009] Furthermore, one end of the compression spring is connected to the frame body through a C-class flat washer, and the other end of the compression spring is fixedly connected to the mounting portion.

[0010] The present invention also provides a control circuit for a traveling crane anti-skew pulling and slanting hanging device, comprising a contactor control circuit and a trolley control circuit connected in series to the traveling crane circuit, wherein a relay control circuit is connected in parallel to the contactor control circuit.

[0011] Further, the contactor control circuit includes a contactor a branch, a contactor b branch, a contactor c branch and a contactor d branch connected in parallel with each other, the contactor a branch includes a contactor a connected in series to the positive electrode of the power supply through pin 1, the pin 2 of the contactor a is connected in series to the negative electrode of the power supply, the pin 3 of the contactor a is connected in series with a diode a and a resistor a and then connected to the negative electrode of the power supply, the contactor b branch includes a contactor b connected in series to the positive electrode of the power supply through pin 1, the pin 2 of the contactor b is connected in series to the negative electrode of the power supply, the pin 3 of the contactor b is connected in series with a diode b and a resistor b and then connected to the negative electrode of the power supply, the contactor c branch includes a contactor c connected in series to the positive electrode of the power supply through pin 1, the pin 2 of the contactor c is connected in series to the negative electrode of the power supply, the pin 3 of the contactor c is connected in series with a diode c and a resistor c and then connected to the negative electrode of the power supply, the contactor d branch includes a contactor d connected in series to the positive electrode of the power supply through pin 1, the contactor d Pin 2 of contactor d is connected in series with the negative electrode of the power supply, pin 3 of contactor d is connected in series with diode d and resistor d and then connected to the negative electrode of the power supply, the contactor d branch includes a contactor d connected in series to the positive electrode of the power supply through pin 1, pin 2 of contactor d is connected in series with the negative electrode of the power supply, and pin 3 of contactor d is connected in series with diode d and resistor d and then connected to the negative electrode of the power supply.

[0012] Furthermore, the relay control circuit is a relay a, a relay b, a relay c and a relay d connected to the positive electrode of the power supply, which are connected in parallel with a resistor e and connected in series with the negative electrode of the power supply.

[0013] Furthermore, the trolley control circuit includes contactors a1, b1, c1, d1 and e1 connected in parallel with each other, and the contactors a1, b1, c1, d1 and e1 are all composed of a relay e and a resistor f connected in series.

[0014] The present invention is fixed to the outer shell of the crane electric hoist by welding a fixing plate of the frame body, and is used to prevent the electric hoist from tilting or slanting when the crane is in use. During installation, one end of the wire rope of the electric hoist passes through the center of four baffles. If the crane operation tilts or slants, the wire rope will deviate to one side, and the wire rope will drive the baffle to slide close to the proximity switch. The four proximity switches respectively control the forward travel, reverse travel, forward travel, and reverse travel of the trolley of the crane. In addition, the four proximity switches can control the rise of the crane hook lifting motor. When the distance between the baffle and the proximity switch is less than 4 mm, the proximity switch sends an electrical signal after sensing, controlling the crane hook to not continue to rise to lift the heavy object, and not continue to move in the tilted direction. In this state, the hook can work normally when it descends and in the opposite direction of the tilted direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 The present invention Figure 1 Schematic diagram of the AA section;

[0018] Figure 3 The present invention Figure 1 Schematic diagram of the middle BB section;

[0019] Figure 4 Schematic diagram of a contactor control circuit and a relay control circuit of the present invention;

[0020] Figure 5 It is a schematic diagram of the trolley control circuit of the present invention.

[0021] Explanation of numbers in the figure: 1-frame body, 2-transverse axis, 3-installation part, 4-compression spring, 5-hexagonal nut, 6-grade C flat washer, 7-proximity switch, 8-longitudinal axis, 9-plate body, 10-wire rope, 11-electric hoist. DETAILED DESCRIPTION

[0022] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0023] like Figures 1 to 5 As shown, this embodiment provides a vehicle anti-skew and slant lifting device, including a frame body, on which a group of longitudinal axes and a group of transverse axes perpendicular to the longitudinal axes are fixedly mounted, each group of the longitudinal axes and the transverse axes are movably mounted with baffles, each group of the longitudinal axes and the transverse axes are mounted with compression springs on the outer side of the baffles, and a proximity switch controlled by a control circuit is mounted on each of the four walls of the frame body, and the head of each proximity switch is aligned with the center position of the four baffles.

[0024] Furthermore, the transverse axis and the longitudinal axis are both fixed to the frame body through hexagonal nuts, and a C-grade flat washer is provided between the frame body and the hexagonal nuts.

[0025] Furthermore, the proximity switch is fixedly connected to the frame body via a hexagonal nut.

[0026] Furthermore, the baffle includes a plate body, and both ends of the plate body are provided with mounting parts that are integrally formed therewith and movably engaged with the longitudinal axis and the transverse axis.

[0027] Furthermore, one end of the compression spring is connected to the frame body through a C-class flat washer, and the other end of the compression spring is fixedly connected to the mounting portion.

[0028] The present invention also provides a control circuit for a traveling crane anti-skew pulling and slanting hanging device, comprising a contactor control circuit and a trolley control circuit connected in series to the traveling crane circuit, wherein a relay control circuit is connected in parallel to the contactor control circuit.

[0029] Further, the contactor control circuit includes a contactor a branch, a contactor b branch and a contactor c branch connected in parallel with each other, the contactor a branch includes a contactor a connected in series to the positive electrode of the power supply through a pin 1, the pin 2 of the contactor a is connected in series to the negative electrode of the power supply, the pin 3 of the contactor a is connected in series with a diode a and a resistor a and then connected to the negative electrode of the power supply, the contactor b branch includes a contactor b connected in series to the positive electrode of the power supply through a pin 1, the pin 2 of the contactor b is connected in series to the negative electrode of the power supply, the pin 3 of the contactor b is connected in series with a diode b and a resistor b and then connected to the negative electrode of the power supply, the contactor c branch includes a contactor c connected in series to the positive electrode of the power supply through a pin 1, the pin 2 of the contactor c is connected in series to the negative electrode of the power supply, the pin 3 of the contactor c is connected in series with a diode c and a resistor c and then connected to the negative electrode of the power supply, the contactor d branch includes a contactor d connected in series to the positive electrode of the power supply through a pin 1, the pin 2 of the contactor d is connected in series to the negative electrode of the power supply, and the pin 3 of the contactor d is connected in series with a diode d and a resistor d and then connected to the negative electrode of the power supply.

[0030] Furthermore, the relay control circuit is a relay a, a relay b, a relay c and a relay d connected to the positive electrode of the power supply, which are connected in parallel with a resistor e and connected in series with the negative electrode of the power supply.

[0031] Furthermore, the trolley control circuit includes contactors a1, b1, c1, d1 and e1 connected in parallel with each other, and the contactors a1, b1, c1, d1 and e1 are all composed of a relay e and a resistor f connected in series.

[0032] It is welded and fixed to the outer shell of the crane electric hoist through the fixing plate of the frame body to prevent the electric hoist from tilting or slanting during use. During installation, one end of the wire rope of the electric hoist passes through the center of the four baffles. If the crane operation is tilted or slanted, the wire rope will deviate to one side, and the wire rope will drive the baffle to slide close to the proximity switch. The four proximity switches respectively control the forward travel of the crane trolley, the reverse travel of the trolley, the forward travel of the trolley, and the reverse travel of the trolley; in addition, the four proximity switches can control the rise of the crane hook lifting motor. When the distance between the baffle and the proximity switch is less than 4mm, the proximity switch will send an electrical signal after sensing, controlling the crane hook to stop rising to lift heavy objects and stop moving in the tilted direction. In this state, the hook can operate normally when it descends and in the opposite direction of the tilt.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A control circuit for a crane anti-skew lifting device, characterized in that: The anti-skew and slant lifting device for a vehicle comprises a frame body, a group of longitudinal axes and a group of transverse axes perpendicular to the longitudinal axes are fixedly installed on the frame body, a baffle is movably installed on each group of the longitudinal axes and the transverse axes, a compression spring is installed on each group of the longitudinal axes and the transverse axes close to the outer side of the baffle, a proximity switch controlled by a control circuit is installed on each of the four walls of the frame body, the head of each proximity switch is aligned with the center position of four baffles respectively, the transverse axis and the longitudinal axis are fixed to the frame body by a hexagonal nut, a C-level flat washer is provided between the frame body and the hexagonal nut, the proximity switch is fixedly connected to the frame body by the hexagonal nut, the baffle comprises a plate body, both ends of the plate body are provided with mounting parts which are integrally formed with the plate body and movably engaged with the longitudinal axis and the transverse axis, one end of the compression spring is connected to the frame body by a C-level flat washer, and the other end of the compression spring is fixedly connected to the mounting part; and a series of A contactor control circuit and a trolley control circuit are connected to the driving circuit, a relay control circuit is connected in parallel to the contactor control circuit, the contactor control circuit includes a contactor a branch, a contactor b branch and a contactor c branch connected in parallel with each other, the contactor a branch includes a contactor a connected in series to the positive electrode of a power supply through a pin 1, a pin 2 of the contactor a is connected in series to the negative electrode of the power supply, a pin 3 of the contactor a is connected in series with a diode a and a resistor a, and then connected to the negative electrode of the power supply, the contactor b branch includes a contactor b connected in series to the positive electrode of the power supply through a pin 1, a pin 2 of the contactor b is connected in series to the negative electrode of the power supply, a pin 3 of the contactor b is connected in series with a diode b and a resistor b, and then connected to the negative electrode of the power supply, the contactor c branch includes a contactor c connected in series to the positive electrode of the power supply through a pin 1, a pin 2 of the contactor c is connected in series to the negative electrode of the power supply, and a pin 3 of the contactor c is connected in series with a diode c and a resistor c, and then connected to the negative electrode of the power supply.

2. The control circuit of the anti-skew lifting device for a traveling crane according to claim 1 is characterized in that: The relay control circuit comprises relay a, relay b, relay c and relay d connected to the positive electrode of the power supply, which are connected in parallel with each other, and then connected in series with a resistor e and connected to the negative electrode of the power supply.

3. The control circuit of the anti-skew lifting device for a traveling crane according to claim 1 is characterized in that: The trolley control circuit includes contactors a1, b1, c1, d1 and e1 connected in parallel with each other. The contactors a1, b1, c1, d1 and e1 are all composed of a relay e and a resistor f connected in series.

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