Lifting bracket and method of manufacturing the same

Abstract

The present invention discloses a lifting bracket and a manufacturing method thereof, the lifting bracket comprising: a first plate body, a second plate body and a support plate; the first plate body and the second plate body are respectively provided with slots, the first plate body and the second plate body are arranged in parallel and spaced apart, bosses are respectively provided at both ends of the support plate, the bosses at both ends of the support plate are respectively inserted into and fixed in the slots on the first plate body and the second plate body, and the support plate is respectively perpendicular to the first plate body and the second plate body. A plurality of mounting holes are respectively provided on the first plate body and the second plate body. The lifting bracket and the manufacturing method thereof of the present invention are formed by fixing the support plate after being adapted and plugged and assembled with the first plate body and the second plate body, and the assembly process is relatively convenient. By selecting or prefabricating support plates of different lengths, the length of the final formed lifting bracket can be made different, which shortens the production cycle and reduces costs.

Description

Technical Field

[0001] The invention relates to the technical field of coal mining equipment, and in particular to a lifting bracket and a manufacturing method thereof. Background Art

[0002] A coal mining machine is a commonly used coal mining equipment, which includes: a machine body, a lifting bracket, a rocker arm and a roller. The lifting bracket is connected between the machine body and the rocker arm, and the roller is connected to one end of the rocker arm. It moves to different areas for coal mining with the movement of the rocker arm. By changing the length of the lifting bracket, the distance between the rocker arm and the machine body can be changed, and the rocker arm and the roller can be extended to different mining heights for mining operations.

[0003] In the prior art, the lifting bracket is an integrally formed steel casting, which takes a long time to cast, and when the size of the lifting bracket changes, a new mold needs to be made, which is very costly. Summary of the invention

[0004] In order to solve the technical problems existing in the above-mentioned prior art, the present invention provides a lifting bracket and a manufacturing method thereof. The specific technical solution is as follows:

[0005] In a first aspect, a lifting bracket is provided, which includes: a first plate body, a second plate body and a support plate; slots are respectively provided on the first plate body and the second plate body, the first plate body and the second plate body are arranged in parallel and spaced apart, bosses are respectively provided at both ends of the support plate, the bosses at both ends of the support plate are respectively inserted into and fixed in the slots on the first plate body and the second plate body, the support plate is respectively perpendicular to the first plate body and the second plate body; a plurality of mounting holes are respectively provided on the first plate body and the second plate body.

[0006] Furthermore, the support plate is fixed to the first plate body and the second plate body by welding respectively.

[0007] Furthermore, a chamfer is provided on an outer edge of the boss, a groove is provided on a side of the slot away from the support plate, and a groove weld is formed between the groove and the chamfer after the boss is inserted into the slot.

[0008] Furthermore, the lifting bracket also includes a side plate, two ends of the side plate are respectively connected to the first plate body and the second plate body, and the side plate is perpendicular to the support plate.

[0009] Furthermore, a plurality of rib plates are connected between the first plate body and the second plate body, and the plurality of rib plates form a quadrilateral structure.

[0010] Furthermore, the support plate is made of low alloy structural steel.

[0011] In a second aspect, a method for manufacturing a lifting bracket is provided, the method comprising: determining the length of a support plate and selecting a support plate of a preset length; inserting bosses at both ends of the support plate into slots of a first plate body and a second plate body respectively; welding at contact positions between the bosses and the slots to form welds; heat treating the welded support plate, the first plate body and the second plate body; and processing mounting holes on the first plate body and the second plate body.

[0012] Furthermore, after the weld is formed at the contact position between the boss and the slot, the method further includes: welding the side plate between the first plate body and the second plate body; and / or welding the multiple rib plates between the first plate body and the second plate body.

[0013] Further, fillet welds are formed between the side plates, the first plate body and the second plate body respectively; and / or, fillet welds are formed between each of the plurality of rib plates, the first plate body and the second plate body respectively.

[0014] The main advantages of the technical solution of the present invention are as follows:

[0015] The lifting bracket and the manufacturing method of the present invention are characterized in that the lifting bracket is fixedly formed after the support plate is respectively adapted and plugged with the first plate body and the second plate body for assembly, and the assembly process is relatively convenient. By selecting or prefabricating support plates of different lengths, the length of the final formed lifting bracket can be made different. Compared with the integral mold for making multiple lifting brackets in the prior art, the present invention only needs to obtain support plates of different lengths to make the final formed lifting bracket have different lengths, thereby shortening the production cycle and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the embodiments of the present invention and constitute a part of the present invention. 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:

[0017] Figure 1 A schematic structural diagram of a first plate body in a lifting bracket provided in one embodiment of the present invention;

[0018] Figure 2 An AA cross-sectional view of a first plate body in a lifting bracket provided in one embodiment of the present invention;

[0019] Figure 3 A schematic structural diagram of a second plate body in a lifting bracket provided in one embodiment of the present invention;

[0020] Figure 4 An AA cross-sectional view of a second plate body in a lifting bracket provided by an embodiment of the present invention;

[0021] Figure 5 A front view of a support plate in a lifting bracket provided in one embodiment of the present invention;

[0022] Figure 6 A side view of a support plate in a lifting bracket provided for one embodiment of the present invention;

[0023] Figure 7 A cross-sectional view of a lifting bracket in one direction provided by an embodiment of the present invention;

[0024] Figure 8 A cross-sectional view of a lifting bracket in another direction provided by an embodiment of the present invention;

[0025] Fig. 9 EE cross-sectional view of a lifting bracket provided for one embodiment of the present invention.

[0026] Description of reference numerals:

[0027] 1-first plate body, 2-second plate body, 3-support plate, 4-slot, 5-boss, 6-mounting hole, 7-side plate, 8-rib plate. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. 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 making creative work are within the scope of protection of the present invention.

[0029] The technical solution provided by the embodiments of the present invention is described in detail below with reference to the accompanying drawings.

[0030] In a first aspect, an embodiment of the present invention provides a lifting bracket, as shown in the attached Figure 1-9 As shown, the lifting bracket includes: a first plate body 1, a second plate body 2 and a support plate 3. The first plate body 1 and the second plate body 2 are respectively provided with slots 4, the first plate body 1 and the second plate body 2 are arranged in parallel and spaced apart, and bosses 5 are respectively provided at both ends of the support plate 3, and the bosses 5 at both ends of the support plate 3 are respectively inserted and fixed into the slots 4 on the first plate body 1 and the second plate body 2, and the support plate 3 is respectively perpendicular to the first plate body 1 and the second plate body 2. A plurality of mounting holes 6 are respectively provided on the first plate body 1 and the second plate body 2.

[0031] When used, the length of the required lifting bracket is determined according to the mining height range, the amount of lying, the length of the rocker arm and the size of the oil cylinder of the coal mining machine. The total length of the lifting bracket is equal to the length of the support plate 3 plus the thickness of the first plate body 1 and the second plate body 2. Under the premise that the structure and size of the first plate body 1 and the second plate body 2 remain unchanged, by selecting or prefabricating support plates 3 of different lengths, the length of the final formed lifting bracket can be different. The bosses 5 at both ends of the support plate 3 are adapted, plugged and fixed with the first plate body 1 and the second plate body 2, and the installation and assembly process is relatively convenient. The first plate body 1 and the second plate body 2 are respectively connected to the fuselage and the rocker arm through the mounting holes 6, so that the height of the rocker arm is different, so that the coal mining machine can reach different mining height ranges. The structure and size of the first plate body 1 and the second plate body 2 remain unchanged, and they can be obtained by corresponding molds. Support plates 3 of different lengths can be obtained by making multiple corresponding molds or by cutting and processing. Compared with the integral mold of making multiple lifting brackets in the prior art, the present invention only needs to obtain support plates 3 of different lengths to make the final formed lifting bracket of different lengths, shortening the production cycle and reducing costs.

[0032] Among them, the length of the boss 5 at both ends of the support plate 3 can be smaller than the length of the support plate 3, so as to form a step surface between the support plate 3 and the boss 5. When plugged in and fixed, the plate surfaces of the first plate body 1 and the second plate body 2 respectively contact the step surface, which plays a supporting effect, so that the lifting bracket can withstand greater pressure and the fixing effect is better.

[0033] The structure and size of the first plate body 1 and the second plate body 2 can be determined according to the structure and size of the connecting end of the fuselage and the rocker arm, and a good connection effect is sufficient. Figure 1 As shown, the main body of the first plate body 1 is an isosceles trapezoidal structure, with a slot 4 processed in the middle, three lugs disposed at the edge, and a mounting hole 6 processed on each lug. Figure 3 As shown, the main body of the second plate body 2 is a special-shaped plate close to a parallelogram structure, one side of which is arc-shaped, and four lugs are processed at the edge position, and each lug is processed with a mounting hole 6.

[0034] It can be understood that since the first plate body 1 and the second plate body 2 have no difference in structure and size from the two plate bodies in the lifting bracket integrally formed in the prior art, the process of installing the assembled lifting bracket to the coal mining machine is the same as the installation process of the lifting bracket provided by the prior art, and the existing assembly parts can still be used to facilitate installation.

[0035] Optionally, the support plate 3 is fixed to the first plate body 1 and the second plate body 2 respectively by welding. After the support plate 3 is plugged and assembled with the first plate body 1 and the second plate body 2, it is fixed by welding, which is easy to operate and has a good fixing effect.

[0036] Furthermore, as attached Figure 1-7As shown, the outer edge of the boss 5 is provided with a chamfer, and the side of the slot 4 away from the support plate 3 is provided with a groove. After the boss 5 is inserted into the slot 4, a groove weld is formed between the groove and the chamfer. The schematic diagram of the groove weld can be seen in the attached Figure 7 .

[0037] With such arrangement, after the boss 5 is inserted into the groove, the chamfer on the boss 5 is opposite to the groove on the groove, forming an inverted triangular groove, which facilitates the accumulation of the molten pool in the groove during welding and prevents the molten pool from flowing, thereby reducing the difficulty of welding and improving the welding effect.

[0038] Optionally, as attached Figure 7 As shown, the lifting bracket provided by the embodiment of the present invention further includes a side plate 7, the two ends of which are respectively connected to the first plate body 1 and the second plate body 2, and the side plate 7 is perpendicular to the support plate 3. By adding the side plate 7, the side plate 7 plays a supporting role so that the lifting bracket has a stronger pressure bearing capacity. And the side plate 7 is perpendicular to the support plate 3, which can withstand stress impacts in multiple directions and improve the stability of the lifting bracket.

[0039] Furthermore, as attached Figure 8 and attached Fig. 9 As shown, a plurality of ribs 8 are connected between the first plate body 1 and the second plate body 2, and the plurality of ribs 8 form a quadrilateral structure. By providing a plurality of ribs 8, the pressure bearing capacity and impact resistance of the lifting bracket are further improved, and the use safety is higher.

[0040] Optionally, when the area of ​​the second plate body 2 is larger than that of the first plate body 1, the portion of the second plate body 2 not covered by the first plate body 1 may be provided with reinforcing ribs, which are welded and fixed to the plate surface of the second plate body 2 and the plate surface of the plurality of rib plates 8. Fig. 9 As shown, the portion of the second plate body 2 not covered by the first plate body 1 is provided with two parallel reinforcing ribs.

[0041] In the embodiment of the present invention, the support plate 3 has a large bearing capacity. Optionally, the support plate 3 is made of low alloy structural steel, such as Q390, Q420, etc. This material has high strength and toughness, and has high comprehensive mechanical properties after heat treatment, thereby ensuring the overall performance of the lifting bracket.

[0042] The first plate body 1, the second plate body 2, the side plate 7 and the rib plate 8 etc. may be made of carbon structural steel, for example, Q235.

[0043] In a second aspect, an embodiment of the present invention provides a method for manufacturing a lifting bracket, the method comprising:

[0044] Determine the length of the support plate 3 and select a support plate 3 of a preset length.

[0045] The bosses 5 at both ends of the support plate 3 are respectively inserted into the slots 4 of the first plate body 1 and the second plate body 2 .

[0046] A weld is formed at the contact position between the boss 5 and the slot 4 .

[0047] The welded support plate 3, the first plate body 1 and the second plate body 2 are heat treated.

[0048] The mounting holes 6 are processed on the first plate body 1 and the second plate body 2 .

[0049] When in use, the length of the support plate 3 is determined according to the use requirements, and the support plate 3 of the preset length is selected so that the length of the final lifting bracket meets the use requirements. Then the bosses 5 at both ends of the support plate 3 are respectively inserted into the slots 4 of the first plate body 1 and the second plate body 2 to form a lifting bracket, and fixed by welding. Heat treatment is performed to eliminate internal stress and improve strength. Mounting holes 6 are processed on the first plate body 1 and the second plate body 2 to facilitate the connection of the first plate body 1 and the second plate body 2 to the fuselage and the rocker arm respectively. The lifting bracket manufacturing method provided by the present invention only needs to obtain support plates 3 of different lengths to make the final lifting bracket of different lengths. The molding process is simple and easy, the production cycle is shortened, and the cost is low.

[0050] The length of the support plate 3 can be determined according to the mining height range, the amount of bottoming, the length of the rocker arm and the size of the oil cylinder of the coal mining machine. The heat treatment process after welding can be annealing. The mounting hole 6 can be obtained by cutting.

[0051] Optionally, after the contact position of the boss 5 and the slot 4 is welded to form a weld, the method further includes: welding a side plate 7 between the first plate body 1 and the second plate body 2; and / or welding a plurality of rib plates 8 between the first plate body 1 and the second plate body 2. Connecting the side plate 7 and the rib plate 8 by welding is easy to operate and has a good fixing effect.

[0052] During welding, fillet welds are formed between the side plates 7 and the first plate body 1 and the second plate body 2; and / or, fillet welds are formed between each of the plurality of rib plates 8 and the first plate body 1 and the second plate body 2. A schematic diagram of fillet welds can be found in the attached Figure 7 and attached Figure 8 The plate surface of the side plate 7 is perpendicular to the plate surfaces of the first plate body 1 and the second plate body 2, and a fillet weld is formed at the corner, which is convenient for weld formation and has a better fixing effect. Similarly, the plate surface of the rib plate 8 is perpendicular to the plate surfaces of the first plate body 1 and the second plate body 2, and a fillet weld is formed at the corner, which is convenient for weld formation and has a better fixing effect.

[0053] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this article are all referenced to the placement state shown in the accompanying drawings.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A lifting bracket, characterized in that: The length of the final formed lifting bracket can be made different by only obtaining support plates of different lengths. The lifting bracket comprises: a first plate body, a second plate body and a support plate; The first plate body and the second plate body are respectively provided with slots, the first plate body and the second plate body are arranged in parallel and spaced apart, both ends of the support plate are respectively provided with bosses, the bosses at both ends of the support plate are respectively inserted into and fixed in the slots on the first plate body and the second plate body, and the support plate is respectively perpendicular to the first plate body and the second plate body; The first plate body and the second plate body are respectively provided with a plurality of mounting holes; The support plate is respectively welded and fixed to the first plate body and the second plate body; The outer edge of the boss is provided with a chamfer, and the side of the slot away from the support plate is provided with a groove, and a groove weld is formed between the groove and the chamfer after the boss is inserted into the slot; The total length of the lifting bracket is equal to the length of the support plate plus the thickness of the first plate body and the second plate body; The length of the bosses at both ends of the support plate is smaller than the length of the support plate, so as to form a step surface between the support plate and the bosses. When plugged and fixed, the plate surfaces of the first plate body and the second plate body are in contact with the step surface respectively; The lifting bracket further includes a side plate, two ends of which are respectively connected to the first plate body and the second plate body, and the side plate is perpendicular to the support plate; A plurality of ribs are further connected between the first plate body and the second plate body, and the plurality of ribs form a quadrilateral structure; When the area of ​​the second plate body is larger than that of the first plate body, a portion of the second plate body not covered by the first plate body is provided with reinforcing ribs, and the reinforcing ribs are welded and fixed to the plate surface of the second plate body and the plate surfaces of the plurality of rib plates; The support plate is made of low alloy structural steel; The first plate body, the second plate body, the side plate and the rib plate are made of carbon structural steel.

2. A method for manufacturing a lifting bracket using the lifting bracket according to claim 1, characterized in that: The method comprises: Determine the length of the support plate, and select the support plate of a preset length; Inserting the bosses at both ends of the support plate into the slots of the first plate body and the second plate body respectively; Welding to form a weld at a contact position between the boss and the slot; Performing heat treatment on the welded support plate, the first plate body and the second plate body; Processing mounting holes on the first plate body and the second plate body; After the contact position between the boss and the slot is welded to form a weld, the method further comprises: welding the side plate between the first plate body and the second plate body; and / or, The plurality of ribs are welded between the first plate body and the second plate body.

3. The method for manufacturing a lifting bracket according to claim 2, characterized in that: Fillet welds are formed between the side plates, the first plate body and the second plate body respectively; and / or, Each of the plurality of ribs forms a fillet weld with the first plate body and the second plate body.

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