A chain lifting and limiting device

Abstract

The present invention provides a chain lifting limit device, comprising a travel switch bracket, wherein first limit grooves are provided on both sides of the bottom of the travel switch bracket, and a plurality of second limit grooves are provided on the other side of the travel switch bracket, and bolts are clamped inside the plurality of second limit grooves, and both sides of the travel switch bracket are movably connected to one side of a movable frame through bolts, and the two movable frames are clamped and connected to the inner side of the second limit grooves through bolts. The beneficial effects of the present invention are as follows: by setting a limit striker rod and a triangular chain shaft, the limit striker rod can be moved synchronously with the triangular chain shaft, and then by setting the second limit groove and the movable frame, the movable frame can slide inside the second limit groove through the bolts, thereby limiting the movement of the chain, and by setting the limit switch, the chain rotating device can be closed after the movable frame moves to a certain position, thereby more efficiently limiting the chain lifting device.

Description

Technical Field

[0001] The invention belongs to the technical field of chain limiting, and in particular relates to a chain lifting and limiting device. Background Art

[0002] When the chain is rotating and lifting, under certain circumstances and positions, it is necessary to limit the distance moved by the chain, and the traditional chain lifting limit device is installed by welding the switch frame and connecting it to a single chain. When the three chains move, the switch clamp moves so that the limit blocks act on each other, thereby achieving the purpose of limiting. Due to welding and direct connection with a single chain, the switch frame may be limited in use after welding, and may cause wear in local positions after the single chain is installed, making the limit device easier to damage and unable to perform limit processing more effectively, reducing the effect of the limit device on the chain lifting limit. Summary of the invention

[0003] The purpose of the present invention is to provide a chain lifting and limiting device, aiming to solve the problem that the prior art cannot achieve a better limiting effect.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a chain lifting limit device, including a travel switch bracket, first limit grooves are opened on both sides of the bottom of the travel switch bracket, and a plurality of second limit grooves are opened on the other side of the travel switch bracket. Bolts are clamped inside the plurality of second limit grooves, and both sides of the travel switch bracket are movably connected to one side of a movable frame by bolts, and the two movable frames are clamped and connected to the inner side of the second limit groove by bolts, and a limiting mechanism is fixedly installed on the outer side of the movable frame.

[0005] In order to enable the limiting device to limit the moving distance more effectively, as a preferred embodiment of the present invention, the limiting mechanism includes a limiting block fixedly installed on one end of the movable frame, a first washer is provided at the bottom of the limiting block, a second washer is provided at the bottom of the first washer, and a nut is provided at the bottom of the second washer, and the inner sides of the limiting block, the first washer, the second washer and the nut are all threadedly connected to one end of the limiting impact rod.

[0006] In order to enable the limiting device to close the chain rotating lifting device under the action of a certain force, as a preferred embodiment of the present invention, the limiting mechanism also includes a limit switch fixedly mounted on the other end of the movable frame.

[0007] In order to enable the limit striker to move along with the movement of the chain, as a preferred embodiment of the present invention, a triangular chain shaft is inserted and connected to the bottom end of the limit striker.

[0008] In order to make the limit block more anti-impact, as a preferred embodiment of the present invention, the limit block is made of alloy steel material.

[0009] In order to make the limit block more impact-resistant, as a preferred embodiment of the present invention, the chemical composition of the limit block includes the following elements in weight percentage: C: 0.03%, N: 0.04%, Si: 0.09%, Mn: 0.11%, Cr: 11%, Cu: 2%, Ni: 9%, Mo: 0.9%, Al0.5%, Zn5.1%, Mg1.3%, Nb: 0.4%, and the balance is Fe.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1) By setting the limit striker and the triangular chain shaft, the limit striker can move synchronously with the triangular chain shaft, and then by setting the second limit slot and the movable frame, the movable frame can slide inside the second limit slot through the bolt, so as to limit the movement of the chain, and by setting the limit switch, the chain rotating device can be closed after the movable frame moves to a certain position, so as to more efficiently limit the chain lifting device;

[0012] 2) By setting the connection method between the limit striker and the limit block, the limit striker can move the position and angle of the two limit blocks, and then the limit device is easier to install by setting the travel switch bracket and the first limit groove, and the first washer and the second washer have a better fixing effect on the limit block and the limit striker, thereby extending the service life of the limit device and improving the use effect of the limit device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 It is a schematic diagram of the structure of the travel switch bracket of the present invention;

[0016] Figure 3 It is a schematic diagram of the limiting mechanism of the present invention.

[0017] In the figure: 1. travel switch bracket; 2. first limit groove; 3. second limit groove; 4. bolt; 5. movable frame; 6. limit mechanism; 601. limit block; 602. first washer; 603. second washer; 604. nut; 605. limit striker; 606. limit switch; 7. triangular chain shaft. DETAILED DESCRIPTION

[0018] 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.

[0019] Embodiment 1:

[0020] See also Figure 1-3 , the present invention provides the following technical solutions:

[0021] A chain lifting limit device comprises a travel switch bracket 1, wherein first limit grooves 2 are provided on both sides of the bottom of the travel switch bracket 1, and a plurality of second limit grooves 3 are provided on the other side of the travel switch bracket 1, and bolts 4 are clamped inside the plurality of second limit grooves 3, and both sides of the travel switch bracket 1 are movably connected to one side of a movable frame 5 through the bolts 4, and the two movable frames 5 are clamped and connected to the inner side of the second limit grooves 3 through the bolts 4, and a limit mechanism 6 is fixedly installed on the outer side of the movable frame 5.

[0022] During specific use, when installing the limit device, the travel switch bracket 1 can be installed on the chain lifting device that needs to be limited through the first limit groove 2. When the limit device limits the chain lifting, the movement of the chain drives the limit mechanism 6 to move, and then drives the movable frame 5 to move on the travel switch bracket 1. At the same time, the bolt 4 installed on the movable frame 5 moves inside the second limit groove 3, thereby limiting the moving distance of the movable frame 5, and then limiting the chain lifting movement, thereby improving the use effect of the overall limit device.

[0023] In this embodiment: the limiting mechanism 6 includes a limiting block 601 fixedly installed on one end of the movable frame 5, a first washer 602 is arranged at the bottom of the limiting block 601, a second washer 603 is arranged at the bottom of the first washer 602, a nut 604 is arranged at the bottom of the second washer 603, and the inner sides of the limiting block 601, the first washer 602, the second washer 603 and the nut 604 are all threadedly connected to one end of the limiting striker 605.

[0024] During specific use, when the limiting mechanism 6 drives the movable frame 5 to move, as the limiting striker rod 605 moves according to the chain, the limiting block 601 installed on the top of the limiting striker rod 605 is driven to move. When moving to a certain position, the two limiting blocks 601 contact and collide with each other, so that the reverse thrust generated by the limiting block 601 drives the movable frame 5 to move, so that the movable frame 5 moves within a limited distance inside the second limiting groove 3 through the bolt 4, and the first washer 602, the second washer 603 and the nut 604 are all used to fix the limiting block 601 and the limiting striker rod 605, thereby making the limiting device more effective in limiting the chain lifting and lowering.

[0025] In this embodiment, the limit mechanism 6 further includes a limit switch 606 fixedly mounted on the other end of the movable frame 5 .

[0026] During specific use, after the limit block 601 generates a mutual reaction force, the limit switch 606 moves to both sides. At this time, the limit switch 606 can be collided and closed by the reaction force, thereby achieving a more effective limiting effect.

[0027] In this embodiment: the bottom end of the limiting striker rod 605 is interlaced and connected with the triangular chain shaft 7.

[0028] During specific use, during the movement of the chain, the triangular chain shaft 7 enables the three chains to move synchronously, so that when the chain moves, the triangular chain shaft 7 moves accordingly, and then drives the internally installed limit impact rod 605 to move, so that the overall limit device limits the chain lifting and lowering.

[0029] In this embodiment: the limit block 601 is made of alloy steel material.

[0030] During specific use, the alloy steel reduces the damage to the limit blocks 601 when the two limit blocks 601 collide, thereby extending the service life of the limit device.

[0031] Embodiment 2:

[0032] The difference between this embodiment and embodiment 1 lies in the manufacturing method of the limit block 601, which includes the following steps:

[0033] (1) Take Mn: 0.11%, Cr: 11%, Cu: 2%, Ni: 9%, Mo: 0.9%, Al0.5%, Zn5.1%, Mg1.3%, Nb: 0.4% and all the remaining Fe, add them into a vacuum medium frequency induction furnace, heat to 2000℃, until the raw materials are completely melted;

[0034] (2) Take C: 0.03%, N: 0.04%, Si: 0.09%, send them into a ball mill for ball milling, set the ball mill speed to 330r / min, set the ball milling time to 25min, and obtain a mixed powder for standby use;

[0035] (3) The mixture obtained in step 1) and the powder obtained in step 2) are mixed and put into a blender for stirring. The stirring time is set to 20 minutes and the mixture is mixed evenly.

[0036] (4) The mixture obtained in step 3) was added to a vacuum medium frequency induction furnace and heated to 2300° C. for 55 minutes and kept at this temperature for 36 minutes to obtain a casting liquid;

[0037] (5) The casting liquid obtained in step 4) is poured into the sand mold through the gate, molded, and cooled to room temperature to obtain a limit block.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A chain lifting limit device, comprising a travel switch bracket (1), characterized in that: The bottom sides of the travel switch bracket (1) are provided with first limit grooves (2), the other side of the travel switch bracket (1) is provided with a plurality of second limit grooves (3), the interior of the plurality of second limit grooves (3) is clamped with bolts (4), both sides of the travel switch bracket (1) are movably connected to one side of the movable frame (5) through the bolts (4), the two movable frames (5) are clamped and connected to the inner side of the second limit grooves (3) through the bolts (4), the outer side of the movable frame (5) is fixedly installed with a limit mechanism (6), the limit mechanism (6) comprises a limit block (601) fixedly installed with one end of the movable frame (5), the limit A first washer (602) is arranged at the bottom of the positioning block (601), a second washer (603) is arranged at the bottom of the first washer (602), a nut (604) is arranged at the bottom of the second washer (603), the inner sides of the positioning block (601), the first washer (602), the second washer (603) and the nut (604) are all threadedly connected to one end of a positioning rod (605), the positioning mechanism (6) further comprises a limiting switch (606) fixedly mounted to the other end of the movable frame (5), the bottom end of the positioning rod (605) is interlaced with a triangular chain shaft (7), and the positioning block (601) is made of alloy steel material.

Images