A pull plate folding limit device for crane and its manufacturing process

Abstract

The present invention discloses a pull plate folding and limiting device for a crane and a manufacturing process thereof, and relates to the technical field of lifting machinery. The pull plate folding and limiting device for a crane comprises a bottom plate, an adjusting mechanism and a clamping mechanism. Two groups of mounting blocks are arranged above the bottom plate, and rotating rods are rotatably installed inside the two groups of mounting blocks. The outer wall of the rotating rod is sleeved with a limiting steel block. The manufacturing process of the pull plate folding and limiting device for a crane comprises four steps: heating solid solution, impurity removal, heating injection molding and molding demoulding. The pull plate folding and limiting device for a crane can effectively clamp the pull plate of the crane when the pull plate of the crane is flipped, folded and moved during the process of limiting the pull plate of the crane, and can effectively limit the rotation and folding range of the pull plate of the crane, thereby ensuring the normal operation of the crane, and is easy to install and disassemble, thereby promoting the working efficiency of the crane, and having high practicality.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting machinery, and in particular to a pull plate folding and limiting device for a crane and a manufacturing process thereof. Background Art

[0002] Pull plates are commonly used on cranes to connect the booms. When the crane is in transportation or non-working state, the pull plates on the crane are generally in a removed state. In order to prevent the pull plates from moving, the pull plates of the crane need to be limited. However, the pull plate folding and limiting devices of traditional cranes are cumbersome to operate during use, and the folding and limiting effect of the pull plates of the crane is poor. During the limiting process of the pull plates of the crane, the devices are severely worn and have a short service life, which affects the working efficiency of the crane and is not convenient for promotion and use. Summary of the invention

[0003] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a pull plate folding and limiting device for a crane and a manufacturing process thereof, which can solve the problems of complicated operation and poor folding and limiting effect of the pull plate of the crane, and severe wear and tear of the device and short service life during the limiting process of the pull plate of the crane, thereby affecting the working efficiency of the crane.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pull plate folding limit device for a crane, comprising a bottom plate, an adjustment mechanism and a clamping mechanism, two groups of mounting blocks are arranged above the bottom plate, rotating rods are rotatably installed inside the two groups of mounting blocks, and the outer wall of the rotating rod is sleeved with a limit steel block, and two groups of movable cavities are opened inside the mounting blocks and are arranged front and back;

[0005] The adjusting mechanism is arranged on the bottom plate, the adjusting mechanism is connected to the mounting block, and the adjusting mechanism can drive the mounting block to move laterally relative to the bottom plate;

[0006] The movable chamber is located above the adjusting mechanism, and there are two groups of movable chambers which are respectively arranged on two groups of mounting blocks.

[0007] Preferably, the adjustment mechanism includes a bidirectional threaded rod and a slider, a slide groove is opened on the top of the bottom plate, the bidirectional threaded rod is rotatably installed inside the slide groove, the slider is slidably installed inside the slide groove, there are two groups of sliders and they are centrally symmetrical, a threaded hole is opened inside the slider, the slider is threadedly installed on the bidirectional threaded rod, and the crane pull plate is limited. By adjusting the distance between the two groups of limiting steel blocks, it is suitable for the limiting processing of crane pull plates of different widths, thereby increasing the use range of the pull plate folding limiting device of the crane, and it is easy to use and install, and easy to promote and use.

[0008] Preferably, the clamping mechanism includes a rotating disk, a hinged rod, a limit block, a connecting plate, a fixed plate, a connecting column and an interference block. One end of the rotating rod extends to the interior of the movable cavity and is fixedly installed with the rotating disk. The hinged rod is hingedly installed on the rear side of the rotating disk. A limit groove is provided inside the mounting block, and a limit block is slidably installed inside the limit groove. A connecting plate is fixedly installed on the rear side of the limit block. One end of the hinged rod is hingedly installed to an outer wall of one side of the connecting plate. Fixed plates are fixedly installed on adjacent side walls of the two groups of limit blocks. Two groups of connecting columns are fixedly installed on the outer wall of one side of the fixed plate. An interference block is fixedly installed on one end of the two groups of connecting columns. In the process of limiting the crane pull plate, when the crane pull plate is flipped, folded and moved, the crane pull plate can be effectively clamped, and the rotation and folding range of the crane pull plate can be effectively limited, thereby ensuring the normal operation of the crane. It is also easy to install and disassemble, which promotes the working efficiency of the crane and has high practicality.

[0009] Preferably, one end of the bidirectional threaded rod extends to one side outer wall of the base plate and is fixedly provided with a rotating handle, so that the user can drive the bidirectional threaded rod to rotate, thereby facilitating the adjustment of the distance between the two sets of mounting blocks and the two sets of limiting steel blocks.

[0010] Preferably, an outer wall on one side of the abutment block is provided with anti-slip grooves to increase the friction between the abutment block and the pulling plate of the crane.

[0011] Preferably, the abutment block and the fixing plate are located inside the limiting steel block, and the limiting steel block does not contact the abutment block and the fixing plate during movement, thereby preventing the abutment block from colliding with the limiting steel block.

[0012] A manufacturing process of a pull plate folding limit device for a crane comprises the following steps:

[0013] S1. Heating and solid solution: Put the steel wire into a polishing machine to remove the oxide on the surface of the steel wire, and then heat the polished steel wire. Put the polished steel wire into a heating furnace for heating, control the heating temperature to 900-1100 degrees Celsius, and keep heating at this temperature for 5-10 minutes, so that the polished steel wire is completely transformed into an austenitic steel wire;

[0014] S2, impurity removal: soak the austenite steel wire obtained in S2 in an alkaline molten salt at 400-600 degrees Celsius for 30-40 minutes to remove the oxide scale on the surface, then quickly rinse the residual alkali on the surface of the steel wire after alkali immersion with water, put it into a drying box for drying after rinsing, the drying time is 3-5 minutes, and then take it out for use;

[0015] S3, heating injection molding: the steel wire with impurities removed is put back into the heating furnace for heating at a temperature of 1500-1700 degrees Celsius, and the temperature is maintained for 5-10 minutes to completely turn the steel wire into liquid molten steel, and then the liquid molten steel is injected into the mold for shaping;

[0016] S4. Molding and demoulding: Place the mold to cool until the liquid molten steel is completely cooled and formed, and then open the mold through a demoulding machine to obtain a limit steel block, and then grind and polish the limit steel block, and finally apply anti-corrosion paint to obtain a finished limit steel block.

[0017] Preferably, the anti-corrosion paint in S4 is an epoxy resin coating material, which has excellent anti-oxidation and anti-corrosion functions.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) The pull plate folding limit device for a crane performs limit processing on the pull plate of the crane through the coordinated use of a base plate, a mounting block, a rotating rod, a limit steel block, a slide groove, a bidirectional threaded rod and a slider. The distance between two groups of limit steel blocks can be adjusted to be suitable for the limit processing of the pull plates of cranes with different widths, thereby increasing the application range of the pull plate folding limit device for the crane. The device is easy to use and install, and is convenient for promotion and use.

[0020] (2) The folding limit device for the crane pull plate can effectively clamp the crane pull plate when the crane pull plate is flipped, folded and moved through the coordinated use of a rotating disk, a hinged rod, a limit block, a connecting plate, a fixed plate, a connecting column and a resistance block, thereby ensuring the normal operation of the crane and facilitating installation and disassembly, thus promoting the working efficiency of the crane and having high practicality.

[0021] (3) The manufacturing process of the pull plate folding limit device for the crane is simple, and most of the manufacturing methods are mechanical processing with a high degree of automation. The limit steel block produced is more stable, not easy to deform and damage, and has good wear resistance. It is not easy to be corroded during use. At the same time, the molding is simple, and the double impurity removal method is adopted. The limit steel block obtained has higher hardness and strength, longer service life, and can be accepted by the majority of users. The production investment is low, which is convenient for mass production, promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 It is a front view of the present invention;

[0025] Figure 3 It is a left-side structural schematic diagram of the mounting block of the present invention;

[0026] Figure 4 It is a schematic diagram of the top view of the rotating disk of the present invention;

[0027] Figure 5 It is an enlarged view of part A of the present invention;

[0028] Figure 6 It is an enlarged view of part B of the present invention.

[0029] Figure numerals: base plate 1, mounting block 2, rotating rod 3, limiting steel block 4, adjusting mechanism 5, slide groove 501, bidirectional threaded rod 502, slider 503, movable cavity 6, clamping mechanism 7, rotating disk 701, hinged rod 702, limiting block 703, connecting plate 704, fixing plate 705, connecting column 706, resistance block 707, rotating handle 8. DETAILED DESCRIPTION

[0030] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 understood as a limitation on the present invention.

[0032] In the description of the present invention, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0033] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0034] Embodiment 1:

[0035] See also Figure 1-6 The present invention provides a technical solution: a pull plate folding limit device for a crane, comprising a bottom plate 1, an adjusting mechanism 5 and a clamping mechanism 7, two groups of mounting blocks 2 are arranged above the bottom plate 1, and rotating rods 3 are rotatably installed inside the two groups of mounting blocks 2, and the outer wall of the rotating rod 3 is sleeved with a limiting steel block 4, and two groups of active cavities 6 are opened inside the mounting block 2 and are arranged front and back, the adjusting mechanism 5 is arranged on the bottom plate 1, the adjusting mechanism 5 is connected to the mounting block 2, and the adjusting mechanism 5 can drive the mounting block 2 to move horizontally relative to the bottom plate 1, and the active cavity 6 is located above the adjusting mechanism 5, and the number of the active cavity 6 is two groups and they are respectively arranged on the two groups of mounting blocks 2.

[0036] Embodiment 2:

[0037] See also Figure 1-6 On the basis of the first embodiment, the adjusting mechanism 5 includes a bidirectional threaded rod 502 and a slider 503. A slide groove 501 is provided on the top of the bottom plate 1. The bidirectional threaded rod 502 is rotatably installed inside the slide groove 501. The slider 503 is slidably installed inside the slide groove 501. The number of the sliders 503 is two groups and they are centrally symmetrical. A threaded hole is provided inside the slider 503. The slider 503 is threadedly installed with the bidirectional threaded rod 502. The pull plate of the crane is placed between the two groups of limit steel blocks 4, and then the rotation of the rotating handle 8 is controlled to drive the double It rotates toward the threaded rod 502, and then uses the principle of threaded installation of the slider 503 and the bidirectional threaded rod 502 to drive the two groups of sliders 503 to move laterally in the slide groove 501, drive the installation block 2 and the rotating rod 3 to move laterally, and drive the two groups of limiting steel blocks 4 to move laterally, so as to limit the pull plate of the crane. By adjusting the distance between the two groups of limiting steel blocks 4, it is suitable for the limiting processing of the pull plate of the crane with different widths, which increases the use range of the pull plate folding limiting device of the crane, and is easy to use and install, and is convenient for promotion and use.

[0038] Furthermore, the clamping mechanism 7 includes a rotating disk 701, a hinged rod 702, a limit block 703, a connecting plate 704, a fixed plate 705, a connecting column 706 and a resisting block 707. One end of the rotating rod 3 extends to the interior of the movable cavity 6 and is fixedly installed with the rotating disk 701. The rear side of the rotating disk 701 is hingedly installed with the hinged rod 702. A limit groove is provided inside the mounting block 2. The limit block 703 is slidably installed inside the limit groove. The rear side of the limit block 703 is fixedly installed with a connecting plate 704. One end of the hinged rod 702 is hingedly installed with an outer wall of one side of the connecting plate 704. The adjacent side walls of the two groups of limit blocks 703 are fixedly installed with the fixed plates 705. The outer wall of one side of the fixed plate 705 is fixedly installed with two groups of connecting columns 706. The two groups of connecting columns 707 One end of 06 is fixedly installed with a resistance block 707. When the crane's pull plate is folded and moved longitudinally, it drives the two sets of limiting steel blocks 4 longitudinally, drives the rotating rod 3 to rotate, thereby drives the rotating disk 701 to rotate, drives the hinged rod 702 to move laterally, thereby pushing the connecting plate 704 and the limiting block 703 to slide laterally in the limiting groove, drives the fixed plate 705 and the connecting column 706 to move laterally, and drives the resistance block 707 to move laterally. In the process of limiting the crane's pull plate, when the crane's pull plate is flipped, folded and moved, the crane's pull plate can be effectively clamped, and the rotation and folding range of the crane's pull plate can be effectively limited, thereby ensuring the normal operation of the crane, and facilitating installation and disassembly, thereby promoting the working efficiency of the crane and having high practicality.

[0039] Furthermore, one end of the bidirectional threaded rod 502 extends to the outer wall of one side of the base plate 1 and is fixedly installed with a rotating handle 8, which is convenient for the user to drive the bidirectional threaded rod 502 to rotate, thereby facilitating the adjustment of the distance between the two sets of mounting blocks 2 and the two sets of limiting steel blocks 4.

[0040] Furthermore, an outer wall of one side of the resistance block 707 is provided with anti-slip grooves to increase the friction between the resistance block 707 and the pull plate of the crane.

[0041] Secondly, the abutment block 707 and the fixing plate 705 are located inside the limiting steel block 4 , and the limiting steel block 4 does not contact the abutment block 707 and the fixing plate 705 during movement, thereby preventing the abutment block 707 from colliding with the limiting steel block 4 .

[0042] A manufacturing process for a pull plate folding limit device for a crane, comprising the following steps: Step 1, heating and solid solution: putting the steel wire into a polishing machine to remove the oxide on the surface of the steel wire, and then heat treating the polished steel wire, putting the polished steel wire into a heating furnace for heating, controlling the heating temperature to be 900-1100 degrees Celsius, and maintaining the temperature for continuous heating for 5-10 minutes, so that the polished steel wire is completely transformed into an austenitic steel wire, Step 2, impurity removal: soaking the austenitic steel wire obtained in step 2 in an alkaline molten salt at 400-600 degrees Celsius for 30-40 minutes to remove the oxide scale on its surface, and then quickly washing the residual alkali on the surface of the alkali-soaked steel wire with water, and after rinsing, putting it into a drying box for drying, the drying time is 3-5 minutes, and taking it out for use after drying, Step 3, heating and injection molding: putting the steel wire with impurities removed back into the heating furnace for heating, and the heating temperature is 1500-1700 degrees Celsius degree, maintain the temperature for 5-10 minutes, so that the steel wire is completely transformed into liquid molten steel, and then the liquid molten steel is injected into the mold for shaping, step four, molding and demoulding: place the mold to cool until the liquid molten steel is completely cooled and formed, and then open the mold through a demoulding machine to obtain a limiting steel block, and then grind and polish the limiting steel block, and finally apply anti-corrosion paint to obtain a finished limiting steel block. The anti-corrosion paint in step four is an epoxy resin coating material, which has excellent anti-oxidation and anti-corrosion functions, is simple to manufacture, and most of them are machined with a high degree of automation. The manufactured limiting steel block 4 is more stable, not easy to deform and damage, and has good wear resistance. During use, it is not easy to be corroded, and at the same time, the molding is simple, and the double impurity removal method is adopted. The obtained limiting steel block 4 has higher hardness and strength, longer service life, can be accepted by the majority of users, has low production investment, is convenient for mass production, and is easy to promote and use.

[0043] Working principle: when in use, put the pulling plate of the crane between the two groups of limiting steel blocks 4, and then control the rotation of the rotating handle 8 to drive the two-way threaded rod 502 to rotate, and then use the principle of threaded installation of the slider 503 and the two-way threaded rod 502 to drive the two groups of sliders 503 to move laterally in the slide groove 501, drive the installation block 2 and the rotating rod 3 to move laterally, drive the two groups of limiting steel blocks 4 to move laterally, and limit the pulling plate of the crane. Then, when the pulling plate of the crane moves longitudinally in folding, it drives the two groups of limiting steel blocks 4 longitudinally, drives the rotating rod 3 to rotate, thereby drives the rotating disk 701 to rotate, drives the hinged rod 702 to move laterally, thereby pushing the connecting plate 704 and the limiting block 703 to slide laterally in the limiting groove, drives the fixing plate 705 and the connecting column 706 to move laterally, drives the resistance block 707 to move laterally, and clamps the pulling plate of the crane for limited folding.

[0044] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A pull plate folding limit device for a crane, comprising a bottom plate (1), an adjustment mechanism (5) and a clamping mechanism (7), characterized in that: Two groups of mounting blocks (2) are arranged above the bottom plate (1), and a rotating rod (3) is rotatably mounted inside the two groups of mounting blocks (2). The outer wall of the rotating rod (3) is sleeved with a limiting steel block (4), and two groups of movable cavities (6) are opened inside the mounting blocks (2) and are arranged front and back; The adjusting mechanism (5) is arranged on the bottom plate (1), the adjusting mechanism (5) is connected to the mounting block (2), and the adjusting mechanism (5) can drive the mounting block (2) to move laterally relative to the bottom plate (1); The movable chamber (6) is located above the adjustment mechanism (5), and the movable chamber (6) is provided in two groups and is respectively arranged on two groups of mounting blocks (2); The adjusting mechanism (5) comprises a bidirectional threaded rod (502) and a slider (503); a slide groove (501) is provided on the top of the bottom plate (1); the bidirectional threaded rod (502) is rotatably mounted inside the slide groove (501); the slider (503) is slidably mounted inside the slide groove (501); the sliders (503) are provided in two groups and are centrally symmetrical; a threaded hole is provided inside the slider (503); the slider (503) and the bidirectional threaded rod (502) are threadedly mounted; The clamping mechanism (7) comprises a rotating disk (701), a hinged rod (702), a limit block (703), a connecting plate (704), a fixed plate (705), a connecting column (706) and an abutment block (707); one end of the rotating rod (3) extends to the inside of the movable cavity (6) and is fixedly mounted with the rotating disk (701); the rear side of the rotating disk (701) is hingedly mounted with the hinged rod (702); a limit groove is provided inside the mounting block (2); the inside of the limit groove is A limit block (703) is slidably mounted on the upper part, a connecting plate (704) is fixedly mounted on the rear side of the limit block (703), one end of the hinge rod (702) is hingedly mounted to an outer wall of one side of the connecting plate (704), a fixing plate (705) is fixedly mounted on adjacent side walls of the two sets of limit blocks (703), two sets of connecting columns (706) are fixedly mounted on an outer wall of one side of the fixing plate (705), and a resisting block (707) is fixedly mounted on one end of the two sets of connecting columns (706).

2. A pull plate folding and limiting device for a crane according to claim 1, characterized in that: One end of the bidirectional threaded rod (502) extends to an outer wall of one side of the bottom plate (1) and is fixedly mounted with a rotating handle (8).

3. A pull plate folding and limiting device for a crane according to claim 2, characterized in that: An outer wall of one side of the resistance block (707) is provided with anti-slip grooves.

4. A pull plate folding and limiting device for a crane according to claim 3, characterized in that: The abutment block (707) and the fixing plate (705) are located inside the limiting steel block (4), and the limiting steel block (4) does not contact the abutment block (707) and the fixing plate (705) during movement.

5. A manufacturing process of a pull plate folding and limiting device for a crane as claimed in any one of claims 1 to 4, characterized in that: The following steps are involved: S1. Heating and solid solution: Put the steel wire into a polishing machine to remove the oxide on the surface of the steel wire, and then heat the polished steel wire. Put the polished steel wire into a heating furnace for heating, control the heating temperature to 900-1100 degrees Celsius, and keep heating at this temperature for 5-10 minutes, so that the polished steel wire is completely transformed into an austenitic steel wire; S2, impurity removal: soak the austenite steel wire obtained in S2 in an alkaline molten salt at 400-600 degrees Celsius for 30-40 minutes to remove the oxide scale on the surface, then quickly rinse the residual alkali on the surface of the steel wire after alkali immersion with water, put it into a drying box for drying after rinsing, the drying time is 3-5 minutes, and then take it out for use; S3, heating injection molding: the steel wire with impurities removed is put back into the heating furnace for heating at a temperature of 1500-1700 degrees Celsius, and the temperature is maintained for 5-10 minutes to completely turn the steel wire into liquid molten steel, and then the liquid molten steel is injected into the mold for shaping; S4, molding and demoulding: the mold is placed to cool until the liquid molten steel is completely cooled and formed, and then the mold is opened by a demoulding machine to obtain a limit steel block, and then the limit steel block is grinded and polished, and finally coated with anti-corrosion paint to obtain a finished limit steel block, and the anti-corrosion paint is an epoxy resin coating material.

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