A fixing device for hydraulic support lifting ring

Abstract

The utility model relates to hydraulic support technical field especially relates to a kind of fixing device for hydraulic support lifting ring, the fixing device includes fixed pin and locking piece, limit groove and mounting hole are set on fixed pin, locking piece is clamped in limit groove, prevent locking piece from falling off due to the work vibration of hydraulic support. The cooperation of the locking piece and the fixed pin of the utility model is more stable and reliable. The locking piece can block the rotation of the lifting ring, ensuring the stability of the lifting ring on the lower beam surface of the hydraulic support top beam without shaking, avoiding bumping the head of the underground worker passing below due to shaking, and protecting the personal safety of the worker.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic support technology, and in particular to a fixing device for the lifting ring of a hydraulic support. Background Technology

[0002] Fully mechanized coal mining is an important indicator of technological advancement in coal mining and a crucial means for increasing coal production, improving labor efficiency, and enhancing economic benefits. The core of high-yield and high-efficiency fully mechanized mining technology lies in the fully mechanized mining equipment at the coal face. A fully mechanized mining face has three main supporting pieces of equipment: the coal mining machine, the scraper conveyor, and the hydraulic support, with the hydraulic support being one of the primary pieces of equipment in a fully mechanized mining face.

[0003] In my country, coal seams are classified into thin, medium-thick, and thick seams based on their thickness. Thin coal seams refer to those less than 1.3m thick when mined underground, medium-thick coal seams refer to those between 1.3m and 3.5m thick when mined underground, and thick coal seams refer to those more than 3.5m thick when mined underground.

[0004] Cutting depth is the depth to which the working mechanism of a coal mining machine cuts into the coal face. It is a major factor that determines the production capacity and installed power of the coal mining machine, and it is also an important parameter that is matched with support equipment and transportation equipment.

[0005] Thin coal seams typically have a depth of less than 1.3m. The lowest support depth of a hydraulic support in a thin coal seam is less than 1m, while the highest support depth is generally around 1.7m. Workers are typically around 1.7m tall. According to GB25974.1, the width of the walkway within the hydraulic support should be no less than 0.6m, and the height should be no less than 0.4m.

[0006] like Figure 1 As shown, during coal mining operations using hydraulic supports in thin and medium-thick coal seams, the lifting rings used for hoisting heavy objects are fixed to the lower beam surface of the hydraulic support's top beam via lifting ring seats, and the lifting rings are positioned directly above the walkway. Since workers inevitably pass under the lifting rings when walking through the walkway, and the hydraulic support vibrates during operation, causing the lifting rings to rotate violently, workers who are not paying attention above are prone to bumping their heads, threatening their personal safety and potentially leading to accidents.

[0007] In existing technology, the lifting ring of a hydraulic support is typically secured using a fixed pin and a cotter pin. The fixed pin has a hole at one end, and the cotter pin passes through this hole to prevent the lifting ring from rotating. However, due to vibration and impact during operation, the cotter pin can easily fall off, thus losing its limiting function. After the cotter pin is inserted into the hole of the fixed pin, the open portion needs to be pried open, and during disassembly, it needs to be closed again, making the operation inconvenient and prone to damaging the cotter pin.

[0008] Therefore, this utility model proposes a fixing device for the lifting ring of a hydraulic support to solve the above problems. Utility Model Content

[0009] (a) Technical problems to be solved

[0010] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a fixing device for the lifting ring of a hydraulic support, which solves the technical problem that the cotter pin is easy to fall off due to the working vibration of the hydraulic support when the lifting ring is fixed by fixing pin and cotter pin.

[0011] (II) Technical Solution

[0012] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0013] This utility model proposes a fixing device for a hydraulic support lifting ring, comprising: a fixing pin, one end of which has a limiting groove formed on its outer periphery, the bottom of which has a mounting hole, and the other end of which is fixed to the lower beam surface of the hydraulic support top beam and located inside the ring of the lifting ring; and a locking member, one end of which is detachably inserted into the mounting hole and engaged in the limiting groove, and the other end abutting against the lower ring surface of the lifting ring to prevent the lifting ring from rotating downward.

[0014] Optionally, the locking component includes a positioning part and a limiting part, the positioning part and the limiting part are integrally formed, one end of the positioning part is connected to one end of the limiting part to form the closed end of the locking component, and the other end of the positioning part and the other end of the limiting part form the open end of the locking component; the positioning part is detachably inserted through the mounting hole, the limiting part is engaged in the limiting groove, and the limiting part and the positioning part can clamp the fixing pin.

[0015] Optionally, the axial direction of the mounting hole coincides with the radial direction of the fixing pin; the fixing pin is vertically fixed to the lower beam surface of the hydraulic support top beam and located inside the ring of the lifting ring; the limiting groove is a complete annular groove, and the limiting part is wavy.

[0016] Optionally, the closed end of the locking member abuts against the lower ring surface of the lifting ring, and the limiting part and the positioning part form an acute angle at the open end of the locking member.

[0017] Optionally, the retaining pin is fixed to one side of the center line of the lifting ring and located inside the ring.

[0018] Optionally, the distance between the axis of the fixing pin and the circular hole of the eyelet seat is 69mm-71mm; the distance between the axis of the fixing pin and the center line of the eyelet is 14mm-16mm.

[0019] Optionally, the fixing pin is made of Q235 round steel with a diameter of 20mm and a length of 36mm; the mounting hole has a diameter of 3.5mm; the locking element is a type B pin, and the positioning part is a round rod with a diameter d0 of 3mm and a limiting groove with a diameter of 16mm.

[0020] Optionally, the eye and eye seat are made by forging; the eye seat is made of 27SiMn material.

[0021] Optionally, the fixing pin is welded to the lower beam surface of the hydraulic support top beam.

[0022] (III) Beneficial Effects

[0023] The beneficial effects of this utility model are as follows: This utility model provides a fixing device for a hydraulic support lifting ring. By setting a limiting groove and a mounting hole on the fixing pin, the locking member is engaged in the limiting groove, preventing the locking member from falling off due to the working vibration of the hydraulic support. Compared with the existing technology that uses a cotter pin through the fixing pin, the locking member and the fixing pin of this utility model have a more stable and reliable fit. The locking member can prevent the lifting ring from rotating, ensuring that the lifting ring is stable and does not wobble on the lower beam surface of the hydraulic support top beam, preventing it from hitting the heads of underground workers passing below due to shaking, thus ensuring the personal safety of the workers. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the background technology;

[0025] Figure 2 This is a bottom view of an embodiment of a fixing device for a hydraulic support lifting ring, wherein the lifting ring and fixing device are installed on the top beam of the hydraulic support.

[0026] Figure 3 This is a front view schematic diagram of an embodiment of a fixing device for a hydraulic support lifting ring, wherein the lifting ring and fixing device are installed on the top beam of the hydraulic support;

[0027] Figure 4 This is a front view schematic diagram of a fixing pin of an embodiment of the fixing device for a hydraulic support lifting ring according to the present invention;

[0028] Figure 5 This is a bottom view schematic diagram of a locking member of an embodiment of a fixing device for a hydraulic support lifting ring according to the present invention;

[0029] Figure 6 This is a bottom view of a locking component and a fixing pin, representing an embodiment of a fixing device for a hydraulic support lifting ring according to the present invention.

[0030] Figure 7 This is a front view schematic diagram of an embodiment of the fixing device for the lifting ring of a hydraulic support according to the present invention, showing the fixing device fixed on the top beam of the hydraulic support.

[0031] [Explanation of Labels in the Attached Image]

[0032] 1: Hydraulic support top beam

[0033] 2: Hanging rings;

[0034] 3: Hanging ring seat;

[0035] 4: Fixing pin; 41: Limiting groove; 42: Mounting hole;

[0036] 5: Locking component; 51: Positioning part; 52: Limiting part. Detailed Implementation

[0037] To better explain and facilitate understanding of this utility model, a detailed description of its specific embodiments is provided below with reference to the accompanying drawings. In this document, directional terms such as "upper" and "lower" are used interchangeably with... Figure 1 The orientation is used as a reference.

[0038] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0039] like Figure 1 As shown, during operation, the hydraulic support used for mining thin coal seams is subject to dynamic loads such as vibration from the coal mining machine and support movement. The lifting ring 2 is prone to reciprocating rotation around the circular hole axis of the lifting ring seat 3. Both the lifting ring 2 and the lifting ring seat 3 are forged, with the lifting ring seat 3 made of 27SiMn material. The pedestrian walkway in the thin coal seam working face is located in a narrow area between the hydraulic support and the coal mining machine. Workers frequently need to pass through the walkway for equipment maintenance, material transportation, and other operations. When the lifting ring 2 rotates, its lower end covers the vertical space of the walkway. Due to the narrow space, workers' attention is mostly focused on the ground beneath their feet, making it easy to overlook the rotation of the lifting ring 2 above. Even if they notice the rotation, the narrow walkway restricts their movement, making it difficult to avoid the impact and increasing the risk of the lifting ring 2 hitting their heads, posing a safety hazard. This utility model is used to fix the lifting ring 2 on the top beam 1 of the hydraulic support, preventing its swaying from threatening the safety of workers.

[0040] Example:

[0041] Reference Figures 2-7This embodiment proposes a fixing device for the lifting ring of a hydraulic support. A lifting ring seat 3 is welded and fixed on the lower beam surface of the hydraulic support top beam 1. The lifting ring 2 is fitted into the circular hole of the lifting ring seat 3. The lifting ring 2 can rotate around the axis of the circular hole on the lifting ring seat 3. This fixing device is used to fix the lifting ring 2 on the hydraulic support top beam 1, preventing it from rotating downward due to vibration during the operation of the hydraulic support, thereby avoiding the lifting ring 2 from hitting the workers in the pedestrian passage below and ensuring construction safety.

[0042] Reference Figure 2 and Figure 3 The fixing device includes a fixing pin 4 and a locking element 5. The fixing pin 4 is made of Q235 round steel, machined into a cylindrical shape with a diameter of 20mm and a length of 36mm. One end of the fixing pin 4 has a limiting groove 41 formed on its outer circumference. In other words, the limiting groove 41 is a continuous annular groove formed on the outer circumferential surface of the fixing pin 4 around its axis. The bottom of the limiting groove 41 has a mounting hole 42. The other end of the fixing pin 4 is fixed to the lower beam surface of the hydraulic support top beam 1 by welding, and the fixing pin 4 is perpendicular to the lower beam surface of the hydraulic support top beam 1. The axis of the mounting hole 42 is perpendicular to the center line of the lifting ring 2 and is located inside the ring of the lifting ring 2.

[0043] One end of the locking member 5 passes through the mounting hole 42, and the locking member 5 is simultaneously engaged in the limiting groove 41 of the fixing pin 4. The locking member 5 will not easily disengage from the mounting hole 42 and the limiting groove 41. By applying a certain external force, it can be disassembled from the mounting hole 42 and the limiting groove 41. This can prevent the locking member 5 from disengaging from the mounting hole 42 and the limiting groove 41 under the action of gravity and the vibration of the hydraulic support, thus preventing the locking member 5 from effectively blocking the downward rotation of the lifting ring 2.

[0044] The other end of the locking element 5 abuts against the lower ring surface of the lifting ring 2, preventing the lifting ring 2 from rotating downwards and avoiding reciprocating rotation around the axis of the circular hole in the lifting ring seat 3 under the normal operating vibration of the hydraulic support. This prevents the lifting ring 2 from colliding with the workers in the pedestrian walkway below, protecting their personal safety. The vertically fixed fixing pin 4 evenly transfers the load from the lifting ring 2 on the locking element 5 to the lower beam surface of the hydraulic support top beam 1, reducing local stress concentration and improving the load-bearing capacity and service life of the entire fixing device.

[0045] To ensure that the locking element 5 can effectively prevent the lifting ring 2 from rotating downward, the fixing pin 4 is located inside the ring of the lifting ring 2.

[0046] Meanwhile, when the lifting ring 2 needs to be used to lift heavy objects, the locking piece 5 must first be removed to release the lock on the lifting ring 2. It is also necessary to ensure that the lifting ring 2 can rotate freely around the axis of the circular hole in the lifting ring seat 3, preventing the fixing pin 4 from obstructing the rotation of the lifting ring 2 and ensuring its normal use when lifting heavy objects. On the one hand, if the distance between the axis of the fixing pin 4 and the circular hole in the lifting ring seat 3 is too large, it can easily interfere with the rotation of the lifting ring 2. Furthermore, the lifting ring seat 3 is welded to the lower beam surface of the hydraulic support top beam 1, and there are weld seams around it. To ensure the welding strength of the fixing pin 4, the fixing pin 4 needs to maintain a certain distance from the lifting ring seat 3 to avoid the weld seam area. Therefore, the distance between the axis of the fixing pin 4 and the circular hole in the lifting ring seat 3 is 70mm ± 1mm. On the other hand, the distance between the axis of the fixing pin 4 and the center line of the lifting ring 2 is 15mm±1mm. If the distance is too small, the contact arm between the locking part 5 and the lifting ring 2 will be shortened, and the blocking effect on the rotation of the lifting ring 2 will be weakened, and a good constraint effect cannot be achieved. If the distance is too large, when the lifting ring 2 rotates around the axis of the circular hole of the lifting ring seat 3, it is easy to interfere with the fixing pin 4, affecting the normal rotation of the lifting ring 2.

[0047] Furthermore, refer to Figure 5 The locking member 5 includes a positioning part 51 and a limiting part 52. The positioning part 51 and the limiting part 52 are integrally formed. One end of the positioning part 51 is connected to one end of the limiting part 52 to form the closed end of the locking member 5. The other end of the positioning part 51 and the other end of the limiting part 52 form the open end of the locking member 5.

[0048] Specifically, the positioning part 51 detachably passes through the mounting hole 42, and the limiting part 52 is engaged in the limiting groove 41. The limiting part 52 and the positioning part 51 can clamp the fixing pin 4, preventing the locking part 5 from disengaging from the mounting hole 42 and the limiting groove 41 under the vibration of the hydraulic support, and preventing the locking ring 2 from failing to block it. The closed end of the locking part 5 abuts against the lower ring surface of the lifting ring 2. The closed end is D-shaped, and its contact area with the lower ring surface of the lifting ring 2 is large, which can disperse the force of the lifting ring 2 on the closed end, avoid local stress concentration, and reduce the blocking effect.

[0049] The limiting part 52 and the positioning part 51 form an acute angle at the opening end of the locking member 5, with an angle range of 30°-60°. When the locking member 5 needs to be inserted into the mounting hole 42, the acute angled opening end can guide external force to act on the opening end of the locking member 5, causing the limiting part 52 and the positioning part 51 to elastically deform from the opening end and open wider, making it easier for the locking member 5 to be inserted into the mounting hole 42.

[0050] Specifically, the axial direction of the mounting hole 42 on the fixing pin 4 coincides with the radial direction of the fixing pin 4. The diameter of the mounting hole 42 is 3.5 mm. The fixing pin 4 is fixed to one side of the center line of the lifting ring 2.

[0051] In a specific embodiment, refer to Figure 5The locking element 5 is a type B pin, which includes a straight rod and a wavy bent rod with three bends. The bent rod forms a limiting part 52, and the straight rod forms a positioning part 51. The type B pin allows the straight rod and the bent rod to be relatively close together without external force. The straight rod of the type B pin is inserted into the mounting hole 42, and the bent rod is located in the limiting groove 41, causing the straight rod and the bent rod to be spread apart and thus both have elastic restoring force, allowing the bent rod and the straight rod to clamp and fix the pin 4. The positioning part 51 is a round rod with a diameter d0 = 3 mm. Two of the three bends of the bent rod are close to the straight rod (i.e., the troughs), forming an outwardly convex arc segment between the two troughs. The diameter of the circle containing this arc segment is 16 mm. One end of the bent rod is connected to the straight rod via an arc transition, forming a D-shaped closed end. The other end of the bent rod is bent away from the straight rod, forming an acute-angled open end. The diameter of the limiting groove 41 is 16mm. Specifically, the diameter of the limiting groove 41 refers to the diameter of the annular bottom wall about the axis of the fixing pin 4. When the limiting part 52 is engaged with the limiting groove 41, the limiting part 52 can fit tightly against the bottom of the limiting groove 41, and the limiting part 52 and the positioning part 51 clamp the fixing pin 4 to achieve a stable fixing effect.

[0052] Of course, this utility model is not limited to using a B-type pin as the locking element 5. It can also be an R-type pin, as long as the locking element 5 can prevent the lifting ring 2 from rotating and the locking element 5 is engaged in the limiting groove 41, the locking function of the locking element 5 on the lifting ring 2 can be realized.

[0053] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0054] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0055] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0056] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0057] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A fixing device for a hydraulic support lifting ring, characterized in that, include: The fixing pin (4) has a limiting groove (41) on one end along the circumferential outward. The bottom of the limiting groove (41) is provided with a mounting hole (42). The other end of the fixing pin (4) is fixed to the lower beam surface of the hydraulic support top beam (1) and located inside the ring of the lifting ring (2). The locking element (5) has one end detachably inserted into the mounting hole (42) and engaged in the limiting groove (41), and the other end abuts against the lower ring surface of the lifting ring (2) to prevent the lifting ring (2) from rotating downward.

2. The fixing device for a hydraulic support lifting ring as described in claim 1, characterized in that: The locking member (5) includes a positioning part (51) and a limiting part (52). The positioning part (51) and the limiting part (52) are integrally formed. One end of the positioning part (51) is connected to one end of the limiting part (52) to form the closed end of the locking member (5). The other end of the positioning part (51) and the other end of the limiting part (52) form the open end of the locking member (5). The positioning part (51) is detachably inserted through the mounting hole (42), the limiting part (52) is engaged in the limiting groove (41), and the limiting part (52) and the positioning part (51) can clamp the fixing pin (4).

3. The fixing device for a hydraulic support lifting ring as described in claim 2, characterized in that: The axial direction of the mounting hole (42) coincides with the radial direction of the fixing pin (4); The fixing pin (4) is vertically fixed to the lower beam surface of the hydraulic support top beam (1) and located inside the ring of the lifting ring (2); The limiting groove (41) is a complete annular groove, and the limiting part (52) is wavy.

4. The fixing device for a hydraulic support lifting ring as described in claim 3, characterized in that: The closed end of the locking member (5) abuts against the lower ring surface of the lifting ring (2), and the limiting part (52) and the positioning part (51) form an acute angle at the open end of the locking member (5).

5. A fixing device for a hydraulic support lifting ring as described in claim 4, characterized in that: The fixing pin (4) is fixed to one side of the center line of the lifting ring (2) and is located inside the ring of the lifting ring (2).

6. A fixing device for a hydraulic support lifting ring as described in claim 5, characterized in that: The distance between the axis of the fixing pin (4) and the circular hole of the lifting ring seat (3) is 69mm-71mm; The distance between the axis of the fixing pin (4) and the center line of the lifting ring (2) is 14mm-16mm.

7. A fixing device for a hydraulic support lifting ring as described in claim 6, characterized in that: The fixing pin (4) is made of Q235 round steel with a diameter of 20mm and a length of 36mm; The diameter of the mounting hole (42) is 3.5 mm; The locking element (5) is a B-type pin, and the positioning part (51) is a round rod with a diameter d0 of 3 mm. The diameter of the limiting groove (41) is 16 mm.

8. A fixing device for a hydraulic support lifting ring as described in claim 7, characterized in that: The lifting ring (2) and the lifting ring seat (3) are made by forging. The lifting ring seat (3) is made of 27SiMn material.

9. A fixing device for a hydraulic support lifting ring as described in claim 1, characterized in that: The fixing pin (4) is welded and fixed to the lower beam surface of the hydraulic support top beam (1).

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