Adjustable steel wire rope bracket and electric shovel

Abstract

The invention discloses an adjustable steel wire rope bracket and an electric shovel. The adjustable steel wire rope bracket comprises a main support, two long rotating parts and adjustable supporting legs, wherein the two long rotating parts are oppositely arranged up and down; the main support comprises an upper frame-shaped structure and a lower fixed supporting leg which is in rigid connection with the upper frame-shaped structure, and the bottom of the fixed supporting leg is hinged to an upper sealing plate of an electric shovel cargo boom. The two long rotating components are fixed in the frame-shaped structure, the steel wire ropes are arranged in a gap between the two long rotating components side by side in a penetrating mode, the distance between the two long rotating components is adjustable, and the portions, making contact with the steel wire ropes, of the long rotating components are rotatable portions; the adjustable supporting leg is hinged between the main support and the upper sealing plate of the electric shovel cargo boom, and the inclination angle of the main support is changed by changing the length of the adjustable supporting leg. The electric shovel steel wire rope bracket overcomes the defects that an existing bracket cannot adjust the distance between two shafts, cannot change the amplitude and is short in service life, and is simple and compact in structure, wide in application range, long in service life and high in safety performance.

Description

Technical Field

[0001] The invention relates to an adjustable wire rope bracket and belongs to the technical field of electric shovels. Background Art

[0002] The electric shovel, also known as the rope shovel or steel lock shovel, is one of the main mining equipment in tens of millions of tons open-pit mines. It has high productivity, high operating rate and low operating cost. It is recognized as an important equipment in the mining industry.

[0003] One end of the electric shovel's wire rope is connected to the lifting system, and the other end is connected to the bucket through a sheave. The span between the lifting system and the sheave is large, so a bracket needs to be installed in the middle to hold the wire rope.

[0004] When the electric shovel is digging, the bucket suddenly loads materials, which will make the wire rope tight. After the materials in the bucket are poured out, the tension on the wire rope will be released. Under the action of instantaneous force, the wire rope will jump up and down, constantly impacting the bracket. In order to reduce the impact force of the wire rope on the bracket and increase the service life of the bracket, it is necessary to design an electric shovel wire rope bracket that can adjust the distance between the two axes and the tilt angle. Summary of the invention

[0005] The technical problem solved by the present invention is to overcome the defects of the existing bracket that the distance between the two axes cannot be adjusted, the amplitude cannot be changed and the service life is short, and to provide an electric shovel wire rope bracket with a simple and compact structure, a wide range of applications, a long service life and high safety performance.

[0006] The present invention is implemented according to the following technical solutions: In a first aspect, the present invention provides an adjustable wire rope bracket, which is mainly used on an electric shovel, comprising: The main support comprises an upper frame structure and a lower fixed support leg rigidly connected thereto, wherein the bottom of the fixed support leg is hinged to the upper cover plate of the electric shovel lifting arm; Two long rotating parts arranged opposite to each other up and down are fixed in the frame structure, a plurality of steel wire ropes are arranged side by side in the gap between the two long rotating parts, and the distance between the two long rotating parts is adjustable, and the part of the long rotating part in contact with the steel wire rope is a rotatable part; The adjustable legs are hinged between the main support and the upper cover plate of the electric shovel lifting arm, and the inclination angle of the main support is changed by changing the length of the adjustable legs.

[0007] In some embodiments, the elongated rotating member comprises: A support shaft, with two axial ends thereof each fixed to two inner side elevations facing each other of the frame structure through a connecting component; A plurality of annular guide blocks are sequentially mounted on the support shaft, and there is a clearance fit between the guide blocks and the support shaft. When the wire rope moves, the guide blocks can rotate around the support shaft, thereby forming the rotatable part.

[0008] In some embodiments, the connecting component comprises: An adjustment plate, mounted on the inner side elevation of the frame structure; A semicircular support block with its opening facing upward is fixed on the side elevation of the adjustment plate facing the support shaft, and both ends of the support shaft are respectively embedded in the corresponding support blocks; The pressing block is assembled on the inner side elevation of the frame structure above the supporting block, and is used to press the supporting block so that it cannot move radially or rotate circumferentially.

[0009] In some embodiments, a flat cut is respectively provided at the two axial end regions of the support shaft; the support shaft is assembled on the support block, the flat cut on the support shaft faces the pressure block, and the lower part of the pressure block extends into the flat cut until the bottom plane of the pressure block is in contact with the bottom plane of the flat cut.

[0010] In some embodiments, at least one row of through holes that are evenly spaced and coaxially arranged are provided on the two inner facades of the frame structure; the adjustment plate is provided with mounting holes that match the through holes, and the adjustment plate is fixed to the inner facade of the frame structure by removable fasteners. The mounting holes on the adjustment plate match the through holes at different positions to adjust the distance between the upper and lower support shafts.

[0011] In some embodiments, the pressing block is provided with a connecting hole that matches the mounting hole on the adjusting plate. When the connecting hole, the mounting hole and any through hole are aligned, the pressing block, the adjusting plate and the frame structure are fixed together by a detachable fastener.

[0012] In some embodiments, the adjustable legs include: The luffing bracket comprises a hollow casing with an opening at the bottom and a mounting frame vertically arranged on the outer side of the casing near the bottom; A luffing leg, the bottom of which is hinged on the upper cover plate of the electric shovel lifting arm, and the top of which is inserted into the sleeve, and the luffing angle is changed by the telescopic movement of the luffing leg in the sleeve, thereby changing the inclination angle of the main support; The limiting component is arranged in the mounting frame and is used to fix the amplitude changing legs and the amplitude changing bracket together after the amplitude changing.

[0013] In some embodiments, the sleeve is provided with a through hole I on the side elevation located in the mounting frame, and the luffing leg is provided with a row of evenly spaced through holes II, and when the through hole I is aligned with any through hole II, it cooperates with the limiting component to fix the luffing leg and the luffing bracket together; the limiting component includes: A telescopic power component is arranged in the mounting frame and mainly consists of a power part and a telescopic rod; A telescopic pin is hinged with the telescopic rod and penetrates into a guide tube in the mounting frame, and the guide tube is coaxially arranged with through hole I; the telescopic pin extends forward through the power unit and is inserted into through hole I and through hole II in sequence, thereby fixing the luffing leg and the luffing bracket together.

[0014] In some embodiments, the mounting frame as a whole is a U-shaped long plate structure with the opening facing upward, and at least one leakage hole is opened on the bottom plate thereof near the sleeve.

[0015] In some embodiments, a pair of hinged plates I opposed to each other are fixed to the top area of ​​the sleeve, and a single-ear hinged seat is fixed to the top area of ​​the fixed leg, the single-ear hinged seat is inserted into the two hinged plates I, and after the stud bolts penetrate the two hinged plates I and the single-ear hinged seat, the stud bolts are axially limited by screwing in nuts on both sides; a double-ear hinged seat is fixed to the top surface of the upper cover plate of the electric shovel boom, and the bottom area of ​​the variable amplitude leg is set as a boss structure, the boss structure is inserted into the double-ear hinged seat, and after the stud bolts penetrate the double-ear hinged seat and the boss structure, the stud bolts are axially limited by screwing in nuts on both sides; a pair of hinged plates II opposed to each other are fixed to the bottom area of ​​the fixed leg, and a single-ear hinged seat is fixed to the top surface of the upper cover plate of the electric shovel boom, the single-ear hinged seat is inserted into the two hinged plates II, and after the stud bolts penetrate the two hinged plates II and the single-ear hinged seat, the stud bolts are axially limited by screwing in nuts on both sides.

[0016] In some embodiments, a radial through hole is provided in each of the two axial end regions of the stud bolt, which is used to prevent the bolt from falling off after the cotter pin is inserted.

[0017] In some embodiments, the lower part of the frame structure is provided with two symmetrically arranged fixed legs, and one fixed leg corresponds to one adjustable leg; the two fixed legs are connected by at least one X-shaped reinforcing beam and at least one cross beam, and a triangular plate is fixed at the connection between the fixed legs and the frame structure.

[0018] In a second aspect, the present invention provides an electric shovel comprising the above-mentioned adjustable wire rope bracket.

[0019] Beneficial effects of the present invention: The invention has a simple and compact structure, a wide range of applications, a long service life and high safety performance, and is an electric shovel wire rope bracket capable of adjusting the distance between two axes and the tilt angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0021] In the attached picture: Figure 1 It is a schematic diagram of the overall structure of the adjustable wire rope bracket of the present invention; Figure 2 It is a schematic diagram of the main support structure of the present invention; Figure 3 It is a schematic diagram of the luffing support structure of the present invention; Figure 4 It is a schematic diagram of the structure of the connecting component of the present invention; Figure 5 It is a schematic diagram of the structure of the hinged part of the luffing leg of the present invention; Figure 6 It is a schematic diagram of the support shaft structure of the present invention; Figure 7 It is a schematic diagram of the structure of the adjustable wire rope bracket of the present invention in a retracted state.

[0022] Figure identification: 1-main bracket, 2-adjusting plate, 3-support block, 4-support shaft, 5-guide block, 6-pressure block, 7-bending bracket, 8-oil cylinder, 9-telescopic pin, 10-bending leg, 11-stud, 12-pin, 13-cotter pin, 14-nut, 15-wire rope, 16-upper cover plate of electric shovel lifting arm.

[0023] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0025] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] like Figure 1 , Figure 7 As shown, an adjustable wire rope bracket is mainly used on an electric shovel, comprising a main bracket 1, two elongated rotating parts arranged opposite to each other up and down, and an adjustable leg; the main bracket 1 comprises an upper frame structure and a lower fixed leg rigidly connected thereto, and the bottom of the fixed leg is hinged on the upper cover plate 16 of the electric shovel boom; the two elongated rotating parts arranged opposite to each other up and down are fixed in the frame structure, and a plurality of wire ropes 15 are arranged side by side in the gap between the two elongated rotating parts, and the spacing between the two elongated rotating parts is adjustable, and the part of the elongated rotating part in contact with the wire rope 15 is a rotatable part; the adjustable leg is hinged between the main bracket 1 and the upper cover plate 16 of the electric shovel boom, and the inclination angle of the main bracket 1 is changed by changing the length of the adjustable leg.

[0028] The above-mentioned elongated rotating component is further described below.

[0029] Continue to refer to Figure 1 , Figure 7 As shown, the elongated rotating component includes a support shaft 4 and a plurality of annular guide blocks 5; the axial ends of the support shaft 4 are fixed to two inner vertical surfaces opposite to each other of the frame structure through a connecting component respectively; the plurality of annular guide blocks 5 are sequentially mounted on the support shaft 4, and there is a clearance fit between the guide blocks 5 and the support shaft 4. When the wire rope 15 moves, the guide blocks 5 can rotate around the support shaft 4, which can reduce the wear of the wire rope 15, thereby forming a rotatable part.

[0030] It should be noted that the support shaft 4 is a hollow shaft to reduce its overall weight without affecting its supporting strength.

[0031] Further solutions, such as Figure 1 , Figure 2 , Figure 4 As shown, the connecting components include an adjusting plate 2, a semicircular supporting block 3 and a pressing block 6; the adjusting plate 2 is mounted on the inner side elevation of the frame structure; the supporting block 3 is fixed with its opening facing upward on the side elevation of the adjusting plate 2 facing the supporting shaft 4, and both ends of the supporting shaft 4 are respectively embedded in the corresponding supporting blocks 3; the pressing block 6 is mounted on the inner side elevation of the frame structure above the supporting block 3, and is used to press the supporting block 3 so that it cannot move radially and rotate circumferentially.

[0032] Further solutions, such as Figure 6 As shown, a flat cutout is respectively provided at the two axial end regions of the support shaft 4; the support shaft 4 is assembled on the support block 3, the flat cutout on the support shaft 4 faces the pressure block 6, and the lower part of the pressure block 6 extends into the flat cutout until the bottom plane of the pressure block 6 fits on the bottom plane of the flat cutout, thereby preventing the support shaft 4 from rotating.

[0033] Further solutions, such as Figure 1 , Figure 2 , Figure 4 As shown, at least one row of through holes evenly spaced and coaxially arranged are provided on the two inner side elevations of the frame structure; mounting holes matching the through holes are provided on the adjustment plate 2, and the adjustment plate 2 is fixed to the inner side elevation of the frame structure by removable fasteners, and the mounting holes on the adjustment plate 2 match the through holes at different positions to adjust the spacing between the upper and lower support shafts 4. The pressing block 6 is provided with a connecting hole matching the mounting hole on the adjustment plate 2, and when the connecting hole, the mounting hole and any through hole are aligned, the pressing block 6, the adjustment plate 2 and the frame structure are fixed together by removable fasteners.

[0034] It should be noted that the attached drawings show a specific embodiment, specifically: two rows of through holes evenly spaced and coaxially arranged are provided on the two inner side elevations of the frame structure, two mounting holes matching the through holes are provided on the upper and lower sides of the adjustment plate 2, and the pressing block 6 is provided with two connecting holes matching the mounting holes on the two adjustment plates 2; when the connecting holes, the mounting holes and any two through holes are aligned, the pressing block 6, the adjustment plate 2 and the frame structure are fixed together by two sets of bolts and nuts 14 on the upper and lower sides. Of course, in actual design, it is not limited to the above two rows of through holes, and can also be designed as three rows of through holes.

[0035] The above-mentioned adjustable legs are further described below.

[0036] like Figure 1 , Figure 3 , Figure 7As shown, the adjustable leg includes a luffing bracket 7, a luffing leg 10 and a limiting component; the luffing bracket 7 includes a hollow sleeve with an opening at the bottom and a mounting frame vertically arranged on the outer facade of the sleeve near the bottom; the bottom of the luffing leg 10 is hinged on the upper cover plate 16 of the electric shovel boom, and the top is inserted into the sleeve, and the luffing angle is changed by the telescopic movement of the luffing leg 10 in the sleeve, thereby changing the inclination angle of the main bracket 1; the limiting component is arranged in the mounting frame, which is used to fix the luffing leg 10 and the luffing bracket 7 after the luffing.

[0037] Further solutions, such as Figure 1 , Figure 3 , Figure 7 As shown, the sleeve is provided with a through hole I on the side elevation located in the mounting frame, and the luffing leg 10 is provided with a row of evenly spaced through holes II. When the through hole I is aligned with any through hole II, it cooperates with the limiting component to fix the luffing leg 10 and the luffing bracket 7 together; the limiting component includes a telescopic power component and a telescopic pin 9; the telescopic power component is arranged in the mounting frame, and mainly consists of a power part and a telescopic rod; the telescopic pin 9 is hinged with the telescopic rod, and the telescopic pin 9 is inserted into a guide tube in the mounting frame, and the guide tube is coaxially arranged with the through hole I; the telescopic pin 9 extends forward through the power part and is inserted into the through hole I and the through hole II in sequence, thereby fixing the luffing leg 10 and the luffing bracket 7 together.

[0038] Further solutions, such as Figure 3 As shown, the front part of the telescopic rod is set as a boss structure, and the tail part of the telescopic pin 9 is provided with a groove structure. The boss structure is inserted into the groove structure, and the two are hinged together by a pin 12 and a cotter pin 13.

[0039] It should be noted that the telescopic power component adopts the oil cylinder 8, and the power part is a cylinder assembly. Of course, in actual use, the telescopic power component is not limited to the above-mentioned oil cylinder 8, and can also be an electric telescopic device.

[0040] Further solutions, such as Figure 3 As shown, the mounting frame as a whole is a U-shaped long plate structure with the opening facing upward, and at least one leakage hole is opened on the bottom plate near the sleeve, so that the bottom plate is hollowed out, which can effectively prevent the accumulation of rainwater and oil stains.

[0041] A specific solution is that two leakage holes are formed after two ends of the bottom plate of the mounting frame are chamfered at the connection with the sleeve.

[0042] Further solutions, such as Figure 1 , Figure 2 , Figure 5As shown, a pair of hinged plates Ⅰ opposed to each other are fixed to the top area of ​​the sleeve, a single-ear hinged seat is fixed to the top area of ​​the fixed leg, the single-ear hinged seat is inserted into the two hinged plates Ⅰ, and after the stud bolt 11 passes through the two hinged plates Ⅰ and the single-ear hinged seat, the nuts 14 on both sides are screwed in to limit the axial position of the stud bolt 11; a double-ear hinged seat is fixed to the top surface of the upper cover plate 16 of the electric shovel boom, and the bottom area of ​​the variable-length leg 10 is set as a boss structure, which is inserted into the double-ear hinged seat. In the seat, after the stud bolt 11 passes through the double-ear hinged seat and the boss structure, the nuts 14 on both sides are screwed in to limit the stud bolt 11 axially; a pair of hinged plates II opposite to each other are fixed to the bottom area of ​​the fixed leg, and a single-ear hinged seat is fixed on the top surface of the upper cover plate 16 of the electric shovel boom, and the single-ear hinged seat is inserted into the two hinged plates II. After the stud bolt 11 passes through the two hinged plates II and the single-ear hinged seat, the nuts 14 on both sides are screwed in to limit the stud bolt 11 axially.

[0043] Further solutions, such as Figure 1 , Figure 2 , Figure 5 As shown, a radial through hole is respectively provided at the two axial end regions of the stud 11 for inserting a cotter pin 13 to prevent the bolt from falling off.

[0044] It should be noted that, in actual use, it is not limited to the above-mentioned stud bolt 11, two nuts 14 and two cotter pins 13, and it can also be a single-head bolt, a nut and a cotter pin or a T-pin shaft and a cotter pin.

[0045] The above main bracket is further described below.

[0046] like Figure 1 , Figure 2 As shown, the upper part of the frame structure is composed of channel steel and flat plate welded together; the lower part of the frame structure is provided with two symmetrically arranged fixed legs, and one fixed leg corresponds to one adjustable leg; the two fixed legs are connected by at least one X-shaped reinforcing beam and at least one cross beam, and a triangular plate is fixed at the connection between the fixed legs and the frame structure.

[0047] During the use of the adjustable wire rope bracket provided by the present invention, the wire rope has different up and down jumping amplitudes due to different working conditions. When the wire rope has a large up and down jumping amplitude, the distance between the two support shafts needs to be increased. When the wire rope has a small up and down jumping amplitude, the distance between the two support shafts needs to be decreased. Since the boom is hinged between the guy rope and the turntable, the guy rope length varies according to different working conditions, and the wire rope bracket is fixed on the boom, this causes the angle between the wire rope and the wire rope bracket to change. When the guy rope is too long, the variable angle of the wire rope bracket needs to be increased. When the guy rope is too short, the variable angle of the wire rope bracket needs to be decreased.

[0048] In summary, the present invention overcomes the defects of the existing bracket that the distance between the two axes cannot be adjusted, the amplitude cannot be changed and the service life is short, and provides an electric shovel wire rope bracket with a simple and compact structure, a wide range of applications, a long service life and high safety performance.

[0049] The electric shovel provided by the present invention is described below. The electric shovel described below and the adjustable wire rope bracket described above can be referred to each other.

[0050] An electric shovel provided by the present invention may include an adjustable wire rope bracket as described in any one of the above embodiments.

[0051] The beneficial effects achieved by the electric shovel provided by the present invention are consistent with the beneficial effects achieved by the adjustable wire rope bracket provided by the present invention, and will not be described in detail here.

[0052] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0053] In addition, those skilled in the art will understand that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments also means being within the scope of protection of the present invention and forming different embodiments. For example, in the above embodiments, those skilled in the art can use them in combination according to the known technical solutions and the technical problems to be solved by this application.

[0054] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. An adjustable wire rope bracket, mainly used on electric shovels, It is characterized in that include: The main support comprises an upper frame structure and a lower fixed support leg rigidly connected thereto, wherein the bottom of the fixed support leg is hinged to the upper cover plate of the electric shovel lifting arm; Two long rotating parts arranged opposite to each other up and down are fixed in the frame structure, a plurality of steel wire ropes are arranged side by side in the gap between the two long rotating parts, and the distance between the two long rotating parts is adjustable, and the part of the long rotating part in contact with the steel wire rope is a rotatable part; The adjustable legs are hinged between the main support and the upper cover plate of the electric shovel lifting arm, and the inclination angle of the main support is changed by changing the length of the adjustable legs.

2. An adjustable wire rope bracket according to claim 1, It is characterized in that The elongated rotating member comprises: A support shaft, with two axial ends thereof each fixed to two inner side elevations facing each other of the frame structure through a connecting component; A plurality of annular guide blocks are sequentially mounted on the support shaft, and there is a clearance fit between the guide blocks and the support shaft. When the wire rope moves, the guide blocks can rotate around the support shaft, thereby forming the rotatable part.

3. An adjustable wire rope bracket according to claim 2, It is characterized in that The connecting component comprises: An adjustment plate, mounted on the inner side elevation of the frame structure; A semicircular support block with its opening facing upward is fixed on the side elevation of the adjustment plate facing the support shaft, and both ends of the support shaft are respectively embedded in the corresponding support blocks; The pressing block is assembled on the inner side elevation of the frame structure above the supporting block, and is used to press the supporting block so that it cannot move radially or rotate circumferentially.

4. An adjustable wire rope bracket according to claim 3, Features: The support shaft is provided with a flat cutout at each of its two axial end regions; the support shaft is assembled on the support block, the flat cutout on the support shaft faces the pressure block, and the lower part of the pressure block extends into the flat cutout until the bottom plane of the pressure block fits on the bottom plane of the flat cutout.

5. An adjustable wire rope bracket according to claim 3, Features: At least one row of through holes are arranged evenly and coaxially on both inner side facades of the frame structure; The adjustment plate is provided with mounting holes matching with the through holes, and the adjustment plate is fixed to the inner side elevation of the frame structure by removable fasteners. The mounting holes on the adjustment plate match with the through holes at different positions to adjust the distance between the upper and lower support shafts.

6. An adjustable wire rope bracket according to claim 5, Features: The pressing block is provided with a connecting hole matched with the mounting hole on the adjusting plate. When the connecting hole, the mounting hole and any through hole are aligned, the pressing block, the adjusting plate and the frame structure are fixed together by a detachable fastener.

7. An adjustable wire rope bracket according to claim 1, It is characterized in that The adjustable legs include: The luffing bracket comprises a hollow casing with an opening at the bottom and a mounting frame vertically arranged on the outer side of the casing near the bottom; A luffing leg, the bottom of which is hinged on the upper cover plate of the electric shovel lifting arm, and the top of which is inserted into the sleeve, and the luffing angle is changed by the telescopic movement of the luffing leg in the sleeve, thereby changing the inclination angle of the main support; The limiting component is arranged in the mounting frame and is used to fix the amplitude changing legs and the amplitude changing bracket together after the amplitude changing.

8. An adjustable wire rope bracket according to claim 7, Features: The sleeve is provided with a through hole I on the side elevation located in the mounting frame, and the luffing leg is provided with a row of evenly spaced through holes II. When the through hole I is aligned with any through hole II, it cooperates with the limiting component to fix the luffing leg and the luffing bracket together; the limiting component includes: A telescopic power component is arranged in the mounting frame and mainly consists of a power part and a telescopic rod; A telescopic pin is hinged with the telescopic rod and penetrates into a guide tube in the mounting frame, and the guide tube is coaxially arranged with through hole I; the telescopic pin extends forward through the power unit and is inserted into through hole I and through hole II in sequence, thereby fixing the luffing leg and the luffing bracket together.

9. An adjustable wire rope bracket according to claim 7, Features: The mounting frame as a whole is a U-shaped long plate structure with an opening facing upward, and at least one leakage hole is opened on the bottom plate thereof near the sleeve.

10. An adjustable wire rope bracket according to claim 7, Features: A pair of hinged plates I facing each other are fixed at the top area of ​​the sleeve, a single-ear hinged seat is fixed at the top area of ​​the fixed leg, the single-ear hinged seat is inserted into the two hinged plates I, and after the stud bolts penetrate the two hinged plates I and the single-ear hinged seat, the nuts on both sides are screwed in to limit the stud bolts axially; A double-ear hinged seat is fixed on the top surface of the upper cover plate of the electric shovel lifting arm, and the bottom area of ​​the variable-length support leg is set as a boss structure, and the boss structure is inserted into the double-ear hinged seat. After the stud bolt passes through the double-ear hinged seat and the boss structure, the nuts on both sides are screwed in to axially limit the stud bolt; A pair of hinged plates II facing each other are fixed to the bottom area of ​​the fixed leg, and a single-ear hinged seat is fixed to the top surface of the cover plate on the electric shovel lifting arm. The single-ear hinged seat is inserted into the two hinged plates II. After the stud bolts pass through the two hinged plates II and the single-ear hinged seat, the nuts on both sides are screwed in to limit the stud bolts axially.

11. An adjustable wire rope bracket according to claim 10, Features: A radial through hole is respectively provided in the axial two end regions of the stud bolt, which is used to prevent the bolt from falling off after the split pin is inserted.

12. An adjustable wire rope bracket according to claim 1, Features: The lower part of the frame structure is provided with two symmetrically arranged fixed legs, and one fixed leg corresponds to one adjustable leg; the two fixed legs are connected by at least one X-shaped reinforcing beam and at least one cross beam, and a triangular plate is fixed at the connection between the fixed legs and the frame structure.

13. An electric shovel, Features: An adjustable wire rope bracket comprising any one of claims 1 to 12.

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