Novel coal mining machine rocker arm cooler fixing structure

Abstract

The embodiment of the invention provides a novel coal mining machine rocker arm cooler fixing structure, and relates to the technical field of coal mining machine rocker arms. The novel coal mining machine rocker arm cooler fixing structure comprises a cooler and a rocker arm shell, the cooler is fixedly connected with the rocker arm shell through a three-section type supporting structure, and the three-section type supporting structure comprises a flange fixing structure at the front end, a two-half type clamping block fixing structure in the middle and a supporting shaft clamping structure at the tail end. The cooler is prevented from being damaged due to working vibration of a rocker arm, and the water leakage risk is reduced. Gears and bearings of a transmission system can be well lubricated when the multi-idle-wheel long-rocker-arm coal mining machine operates at a large mining height and a large dip angle at a high position, and rocker arm heating and damage caused by oil shortage are avoided.

Description

Technical Field

[0001] This application relates to the field of rocker arm technology for coal mining machines, and more specifically, to a novel fixing structure for a rocker arm cooler of a coal mining machine. Background Technology

[0002] The rocker arm of a coal mining machine is a core transmission component in coal mining. Overheating of the rocker arm is a common phenomenon, especially for high-power coal mining machine rocker arms. Overheating can occur during load tests in the workshop or during on-site use by customers, causing loading to be unable to proceed normally and affecting normal coal mine production.

[0003] Therefore, high-power coal mining machine rocker arms are usually equipped with built-in coolers. These coolers remove some of the heat generated by the agitation of the oil in the rocker arm reducer, thus keeping the rocker arm's operating temperature within a normal range. To increase the heat dissipation area of ​​the cooler, the built-in rocker arm cooler is usually designed as a long tubular structure running the length of the rocker arm. However, the solution for fixing the cooler has not been very good. Currently, two common methods are used: One approach is to make the other end of the cooler movable, fixing it to the cooler by adding a support block structure, and then welding the fixing block to the rocker arm housing. Another method is to use a continuous machined hole, with the other end of the cooler directly inserted into the pre-machined hole in the rocker arm. Both methods currently have some drawbacks. While welding avoids the coaxiality issue when machining long holes, on-site welding lacks operational space, making it difficult to guarantee weld quality, potentially leading to the fixing block falling off due to weak welding. The second method often requires machining the long hole from both ends separately, as it cannot be machined in one pass, compromising coaxiality. This can cause the cooler's welds to be pulled apart during installation, resulting in leaks. Summary of the Invention

[0004] The purpose of this application is to provide a novel fixing structure for the rocker arm cooler of a coal mining machine, which has the advantages of effectively preventing the cooler from being damaged by the vibration of the rocker arm during operation, significantly reducing the risk of water leakage, and improving the reliability and service life of the equipment.

[0005] This application is implemented as follows: This application provides a novel fixing structure for a rocker arm cooler in a coal mining machine, comprising a cooler and a rocker arm housing. The cooler is fixedly connected to the rocker arm housing via a three-section support structure, namely a flange fixing structure at the front end, a two-half-type locking block fixing structure in the middle, and a support shaft locking structure at the rear end, which is used to prevent the cooler from being damaged by the vibration of the rocker arm during operation and reduce the risk of water leakage.

[0006] According to the embodiments of this application, the novel rocker arm cooler fixing structure of the coal mining machine includes a flange at the front end of the cooler. The flange is detachably fixed to the rocker arm housing by a screw and an anti-loosening washer disposed on its surface. A sealing component is assembled on the flange.

[0007] According to the novel coal mining machine rocker arm cooler fixing structure of the present application embodiment, the sealing component is a sealing ring, which is embedded between the flange and the contact surface of the rocker arm housing to separate the water flow through the rocker arm housing and seal the oil inside the rocker arm housing.

[0008] According to the embodiment of this application, the novel rocker arm cooler fixing structure of the coal mining machine includes an upper locking block and a lower locking block in the middle of the cooler. The upper locking block and the lower locking block are symmetrically fastened to the outer side of the middle of the cooler and are fixedly connected by two screws and two anti-loosening washers and then assembled on the rocker arm housing.

[0009] According to the novel coal mining machine rocker arm cooler fixing structure of the present application embodiment, the lower locking block is provided with an adjusting pad in the locking groove, and the screw two is fitted with a screw plug and a combination washer. The screw plug and the combination washer cooperate to achieve oil leakage prevention and sealing of the rocker arm housing.

[0010] According to the embodiments of this application, the novel coal mining machine rocker arm cooler fixing structure includes a support shaft at the tail end of the cooler. The front end of the support shaft is provided with an axially extending slotted structure, and the slotted structure is interference-fitted with the tail end shaft of the cooler.

[0011] According to the novel coal mining machine rocker arm cooler fixing structure of the present application embodiment, the outer end of the support shaft is provided with an anti-rotation pressure plate, which is fixed to the support shaft by bolts to limit the axial movement of the support shaft.

[0012] According to the embodiment of this application, the novel rocker arm cooler fixing structure of a coal mining machine has a long tubular structure that runs through the length of the rocker arm. The three-section support structure corresponds to the front end, middle and rear end of the cooler, respectively, to achieve three-point support and fixing of the cooler along its entire length.

[0013] According to the novel coal mining machine rocker arm cooler fixing structure of the present application embodiment, the bolts, screw one and screw two are all made of high-strength alloy material.

[0014] According to the novel coal mining machine rocker arm cooler fixing structure of the present application embodiment, the thread surfaces of the bolts, screw one and screw two are all coated with anti-loosening adhesive to enhance connection stability.

[0015] The beneficial effects of this invention are: This application provides a novel fixing structure for a rocker arm cooler in a coal mining machine. The long tubular cooler, running the length of the rocker arm, is supported at three points: a front flange fixing structure, a middle two-part locking block fixing structure, and a rear support shaft locking structure. This structure provides stable connection to the rocker arm housing. The front flange with a sealing ring is fixed to the rocker arm housing by a screw and an anti-loosening washer. Adjacent sealing rings separate water flow and seal oil. The upper and lower locking blocks in the middle are engaged by two screws and two anti-loosening washers. An adjusting shim in the locking groove compensates for assembly gaps. The screw plugs and combined washers outside the screws prevent oil leakage. The rear support shaft is interference-fitted by the front slotted structure. The sealing rings on the tail shaft and support shaft of the cooler enhance the sealing effect. The outer anti-rotation pressure plate restricts the movement of the support shaft by bolts and adjacent anti-loosening washers. Bolts, screws 1 and 2 are made of high-strength alloy material and coated with anti-loosening adhesive to ensure a stable connection. The pre-set holes and reserved holes on the rocker arm housing have no coaxiality requirements to avoid bending of the cooler welds. The three-section support works together to buffer the working vibration of the rocker arm, preventing the cooler from swinging and causing weld failure and water leakage. At the same time, it avoids the risk of the welded fixing block falling off, ensuring that the cooler continuously removes the heat of the oil in the rocker arm reducer, keeping the gears and bearings of the rocker arm transmission system well lubricated, and ensuring the stable and efficient operation of the coal mining machine rocker arm.

[0016] This application provides a novel fixing structure for a rocker arm cooler in a coal mining machine. Through a three-section support structure including flange fixing, clamping block fixing, and support shaft clamping, it effectively absorbs the vibration of the rocker arm during operation, prevents damage to the cooler, and has the advantages of effectively preventing damage to the cooler due to the vibration of the rocker arm during operation, significantly reducing the risk of water leakage, and improving equipment reliability and service life. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional assembly diagram of the overall structure according to an embodiment of this application; Figure 2 This is a three-dimensional schematic diagram of a two-half-type card block fixing structure according to an embodiment of this application; Figure 3 This is a second perspective view of the two-half-type card block fixing structure according to an embodiment of this application; Figure 4 This is a three-dimensional schematic diagram of the support shaft clamping structure according to an embodiment of this application.

[0019] In the diagram: 1. Cooler; 2. Screw 1; 3. Anti-loosening washer 1; 4. Sealing ring; 5. Lower locking block; 6. Upper locking block; 7. Screw 2; 8. Anti-loosening washer 2; 9. Plug; 10. Combination washer; 11. Adjusting shim; 12. Support shaft; 13. Anti-rotation pressure plate; 14. Bolt; 101. Rocker arm housing. Detailed Implementation

[0020] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0021] Traditional methods for fixing the built-in cooler in the rocker arm of coal mining machines have several drawbacks. When using welding, insufficient on-site operating space makes it difficult to guarantee weld quality, easily leading to the fixing block detaching. When using a continuous machined hole, limitations in machining precision make it difficult to ensure the coaxiality of the hole, which can damage the weld seam during cooler installation, resulting in water leakage. All these problems affect the stable operation and production efficiency of the coal mining machine rocker arm.

[0022] In this regard, such as Figures 1 to 4 As shown, this application proposes a novel fixing structure for a rocker arm cooler of a coal mining machine, including a cooler 1 and a rocker arm housing 101. The cooler 1 is fixedly connected to the rocker arm housing 101 through a three-section support structure. The three-section support structure consists of a flange fixing structure at the front end, a two-half-type locking block fixing structure in the middle, and a support shaft locking structure at the rear end, which is used to prevent the cooler 1 from being damaged by the vibration of the rocker arm during operation and to reduce the risk of water leakage.

[0023] For ease of understanding, the following explains some key terms in this embodiment: Cooler 1 usually refers to a device used for heat exchange. Its function is to remove the heat generated by the oil inside the rocker arm reducer of the coal mining machine in order to maintain the working temperature of the rocker arm within the normal range.

[0024] The rocker arm housing 101 is the external protective structure of the rocker arm of the coal mining machine. It houses the reducer and other working parts and provides installation space and support for the cooler 1.

[0025] The three-section support structure is an overall fixing scheme for fixing the cooler 1 to the rocker arm housing 101. Its feature is that the fixing of the cooler 1 is divided into three independent support points or areas to provide stable support at multiple points.

[0026] Flange fixing structure refers to the method of connecting and fixing components through flanges, which usually involves bolted connections to provide a detachable and reliable connection.

[0027] Furthermore, the two-part locking structure refers to a structure in which two symmetrical locking parts are fastened together to clamp or fix another part. This structure is usually characterized by convenient installation and easy disassembly.

[0028] Furthermore, a support shaft locking structure refers to a structure that uses a shaft-shaped component to engage or cooperate with the fixed component, thereby achieving firm support and positioning. It is usually used to limit the displacement or rotation of the component.

[0029] This embodiment provides a novel fixing structure for a rocker arm cooler in a coal mining machine. The core of this structure lies in reliably connecting the cooler 1 to the rocker arm housing 101. The cooler 1 is typically designed as a tubular structure for heat exchange within the rocker arm housing 101. The rocker arm housing 101 provides installation space and protection for the cooler 1.

[0030] To achieve a fixed connection between the cooler 1 and the rocker arm housing 101, this application employs a three-section support structure. This three-section support structure can provide multi-point support for the cooler 1 along its length, thereby distributing the force and improving the overall stability. For example, the cooler 1 can be designed to have multiple fixing points, which are respectively connected to corresponding structures on the rocker arm housing 101.

[0031] Specifically, the three-section support structure includes a front flange fixing structure, a middle two-part locking block fixing structure, and a rear support shaft locking structure. The front flange fixing structure can be implemented in various ways. For example, a flange can be welded to the front of the cooler 1, and this flange is connected to the corresponding mounting surface on the rocker arm housing 101 via bolts. Alternatively, the flange can be integrally formed with the front of the cooler 1 and then connected to the rocker arm housing 101 via bolts. The middle two-part locking block fixing structure can consist of two semi-circular locking blocks that can be fastened around the middle of the cooler 1 and fixed to the rocker arm housing 101 by external fasteners. For example, the locking blocks can be designed to be connected to the rocker arm housing 101 by pins or rivets. The rear support shaft locking structure can be designed with a shaft hole at the rear of the cooler 1, and a corresponding support shaft on the rocker arm housing 101. This support shaft is inserted into the shaft hole of the cooler 1 and locked in place by friction fit or a simple limiting structure. For example, the support shaft can be designed as a cylinder and inserted directly into the round hole at the tail end of the cooler 1 to provide support through a tight fit.

[0032] Thus, through the aforementioned three-section support structure, the cooler 1 is firmly fixed inside the rocker arm housing 101. This multi-point fixing method can effectively resist the vibration generated during rocker arm operation, thereby preventing the cooler 1 from shifting or being damaged due to vibration. At the same time, since the fixing structure provides stable support, the connection interface between the cooler 1 and the rocker arm housing 101 can remain intact, thereby reducing the risk of oil or cooling medium leakage.

[0033] This application employs a three-section support structure between the cooler 1 and the rocker arm housing 101, including a flange fixing structure at the front end, a two-half-type locking block fixing structure in the middle, and a support shaft locking structure at the rear end, achieving stable fixation of the cooler 1 inside the rocker arm housing 101. This multi-point, segmented fixing method effectively avoids welding quality problems and the risk of fixing block detachment caused by insufficient operating space in traditional welding fixing methods. It also solves the problems of cooler weld damage and water leakage caused by the difficulty in ensuring coaxiality in the through-hole machining method. Therefore, this application can effectively resist the severe vibration during the operation of the coal mining machine rocker arm, ensure the structural integrity of the cooler 1, significantly reduce the possibility of cooler 1 damage and water leakage, and thus ensure the long-term stable operation of the coal mining machine rocker arm.

[0034] In some of the embodiments described above in this application, the cooler 1 is fixedly connected to the rocker arm housing 101 by a flange fixing structure at the front end. However, during the operation of the rocker arm of the coal mining machine, the severe vibration environment places higher demands on the fixed connection of the cooler 1. It may be difficult to guarantee the long-term stability and reliability of the connection by relying solely on a general flange structure. At the same time, when maintenance or replacement is required, the detachability of the connection and the sealing performance of the connection are also key technical issues that need to be considered.

[0035] In this regard, this application further proposes that the flange fixing structure at the front end of the cooler 1 includes a flange disposed at the front end of the cooler 1. The flange is detachably fixed to the rocker arm housing 101 by screw 2 and anti-loosening washer 3, and a sealing component is assembled on the flange.

[0036] Specifically, a flange is a disc-shaped or ring-shaped structural component whose main function is to provide a robust and flat connection interface between the cooler 1 and the rocker arm housing 101. The flange can be integrally formed with the front end of the cooler 1, or it can be securely fixed to the front end of the cooler 1 by welding, threaded connection, or other mechanical connection methods. The geometry and dimensions of the flange should be precisely matched to the corresponding mounting interface on the rocker arm housing 101 to ensure the accuracy and stability of the connection.

[0037] The flange is detachably fixed to the rocker arm housing 101 by screw 2 and anti-loosening washer 3. Screw 2, as the primary fastener, achieves the mechanical connection between the flange and the rocker arm housing 101 through its threaded engagement with a pre-drilled threaded hole on the rocker arm housing 101. Anti-loosening washer 3 is a crucial auxiliary fastener, its function being to enhance the anti-loosening capability of the screw 2 connection. In the high-vibration working environment of the coal mining machine rocker arm, anti-loosening washer 3 can effectively resist thread loosening caused by vibration, for example, by increasing friction, generating elastic preload, or forming a self-locking mechanism to maintain the tightness of screw 2. Common types of anti-loosening washers 3 include spring washers, toothed washers, and double-layered self-locking washers. This fixing method, achieved through screw 2 and anti-loosening washer 3, not only provides sufficient connection strength and vibration resistance but also ensures that the cooler 1 can be easily and non-destructively removed from the rocker arm housing 101 when inspection, maintenance, or replacement is required, thereby improving the ease of equipment maintenance.

[0038] Flanges are fitted with sealing components. These sealing components are used to form an effective barrier at the connection interface to prevent leakage of fluids, such as coolant or lubricating oil. Their function is to ensure the tightness of the connection and prevent equipment failure or environmental pollution due to fluid leakage. These sealing components can take various forms, such as, but not limited to, O-rings, gaskets, sealing rings, liquid sealants, or gaskets. Their selection typically depends on the temperature and pressure of the operating environment, the nature of the fluid being contacted, and the required sealing level.

[0039] Through the above technical solution, a flange is installed at the front end of the cooler 1, and it is detachably fixed using screws 2 and anti-loosening washers 3. This ensures the mechanical strength and seismic resistance of the connection between the cooler 1 and the rocker arm housing 101, effectively preventing the connection from loosening under the vibration of the coal mining machine. At the same time, this detachable fixing method greatly facilitates the installation, maintenance, and replacement of the cooler 1. Furthermore, the sealing components installed on the flange effectively prevent coolant or oil from leaking from the connection point, thereby improving the reliability and safety of the entire cooling system and reducing the risk of failure due to leakage.

[0040] In some embodiments described above, a sealing component is mounted on the flange fixing structure at the front end of the cooler 1. However, in the actual working environment of the coal mining machine rocker arm, the rocker arm housing 101 needs not only cooling water to flow through but also to contain lubricating oil. If the sealing component is merely a general sealing structure, it may not be able to effectively distinguish and isolate the water flow and oil when facing complex working conditions where water and oil coexist and are accompanied by severe vibrations. This can lead to problems such as water-oil mixing, oil leakage, or reduced cooling efficiency, thereby affecting the normal operation of the rocker arm and the equipment life.

[0041] In this regard, this application further proposes that the sealing component is a sealing ring 4, which is embedded between the mating surfaces of the flange and the rocker arm housing 101 to separate the water flow through the rocker arm housing 101 and seal the oil inside the rocker arm housing 101.

[0042] Specifically, the sealing ring 4 is typically made of materials with good elasticity, wear resistance, oil resistance, and water resistance, such as nitrile rubber, fluororubber, or silicone rubber. Its cross-sectional shape can be O-ring, rectangular, or X-ring to adapt to different sealing requirements and installation space. As an elastic sealing element, the core function of the sealing ring 4 is to form a tight contact between the two mating surfaces through its own elastic deformation, thereby blocking the flow path of fluid.

[0043] The sealing ring 4 is precisely fitted between the mating surfaces of the flange and the rocker arm housing 101. This fitting method typically involves pre-machining grooves or recesses on the corresponding mating surfaces of the flange or rocker arm housing 101 that match the shape and size of the sealing ring 4. During assembly, the sealing ring 4 is placed in the groove. When the flange is tightened to the rocker arm housing 101 by screws 2 and anti-loosening washers 3, the sealing ring 4 is appropriately compressed, allowing it to fully fill the tiny gaps between the mating surfaces and generate sufficient sealing preload. This fitting design not only ensures the stability of the sealing ring 4 during operation, preventing it from shifting or falling off due to vibration or fluid pressure, but also ensures that the sealing ring 4 deforms uniformly under pressure, thereby forming a reliable sealing barrier.

[0044] Through the aforementioned embedding method, the sealing ring 4 effectively separates the water flow inside the rocker arm housing 101. In the rocker arm of a coal mining machine, cooling water typically flows through the cooler 1 via specific channels to remove heat generated during operation. The sealing ring 4 physically isolates these cooling water channels from other areas inside the rocker arm housing 101, especially areas that may contain lubricating oil, ensuring that the cooling water flows along a predetermined path and preventing it from overflowing or mixing with oil, thereby maintaining the independence and efficiency of the cooling system.

[0045] Meanwhile, the sealing ring 4 also plays a crucial role in sealing the oil inside the rocker arm housing 101. The transmission components inside the rocker arm of the coal mining machine require lubricating oil for lubrication and cooling. The sealing ring 4 forms a sealing barrier for the oil at the connection between the flange and the rocker arm housing 101, effectively preventing internal lubricating oil from leaking into the external environment or coming into unnecessary contact with cooling water. This is essential for maintaining the integrity of the internal lubrication system of the rocker arm, preventing oil contamination, and ensuring the long-term reliable operation of mechanical components.

[0046] Through the above technical solution, the sealing component is specifically defined as a sealing ring 4, which is embedded between the flange and the contact surface of the rocker arm housing 101. This fully utilizes the elastic deformation characteristics of the sealing ring 4 to form a stable and reliable sealing barrier at the connection interface. The sealing ring 4 effectively isolates the cooling water flow and lubricating oil inside the rocker arm housing 101, avoiding the risk of water-oil mixing and ensuring the independent and efficient operation of the cooling and lubrication systems. Furthermore, this embedded structure effectively prevents the sealing ring 4 from shifting or failing under the severe vibration environment of the coal mining machine rocker arm, ensuring the long-term sealing integrity of the connection and significantly reducing the risk of water and oil leakage. This, in turn, improves the overall reliability and service life of the coal mining machine rocker arm cooler fixing structure.

[0047] In some embodiments described above in this application, the cooler 1 is fixedly connected to the rocker arm housing 101 via a three-section support structure, with the front end employing a flange fixing structure. However, in practical applications, although the front flange fixing structure can provide initial positioning and sealing, ensuring stable support for the middle region of the cooler 1, especially under the severe vibration environment generated during the operation of the coal mining machine rocker arm, and preventing displacement, bending, or fatigue damage due to inertia or resonance, while also considering the convenience of installation and maintenance, is a technical problem that needs to be solved.

[0048] To address this, this application further proposes a two-part locking structure for the middle section of the cooler 1, comprising an upper locking block 6 and a lower locking block 5. The upper locking block 6 and lower locking block 5 are two independent components whose inner contours match the shape of the cooler 1, designed to cover and support the middle section of the cooler 1 from both top and bottom directions. This two-part design makes the installation and disassembly of the cooler 1 more convenient, eliminating the need for threading through the ends of the cooler 1; the two locking blocks can simply be closed from the side. The upper locking block 6 and lower locking block 5 are symmetrically fastened to the outer side of the middle section of the cooler 1. "Symmetrical fastening" means that when the upper locking block 6 and lower locking block 5 are fastened, they form a relatively uniform covering around the central axis of the cooler 1, ensuring a balanced distribution of support force and avoiding localized stress concentration. This fastening method provides a stable, circumferential support for the cooler 1 in the middle position, effectively limiting its radial and axial movement. Furthermore, the upper clamping block 6 and the lower clamping block 5 are fixedly connected by screw 7 and anti-loosening washer 8 and then assembled onto the rocker arm housing 101. Screw 7 is used to tightly connect the upper clamping block 6 and the lower clamping block 5 together, forming an integral clamping structure, and further fixing this clamping structure to the rocker arm housing 101. Anti-loosening washer 8 is an important auxiliary fastener. Its function is to prevent screw 7 from loosening when it is subjected to vibration or impact by increasing friction or generating elastic deformation, thereby ensuring the long-term reliability and stability of the entire central fixing structure. This fixing method not only provides strong clamping force, but also enhances vibration resistance through anti-loosening washer 8, making the cooler 1 able to withstand the severe vibration of the coal mining machine rocker arm during operation without easily loosening.

[0049] Through the above technical solution, the two-part locking structure in the middle of the cooler 1, namely the upper locking block 6 and the lower locking block 5, can be symmetrically fastened to the outer side of the middle part of the cooler 1 and fixedly connected using screw 7 and anti-loosening washer 8, and finally assembled onto the rocker arm housing 101. This design cleverly solves the problem of unstable support in the middle part of the cooler 1 under severe vibration. The symmetrical fastening of the two-part locking blocks ensures uniform encirclement and stable support for the cooler 1, effectively dispersing vibration stress and avoiding local overload and fatigue damage. At the same time, the combined use of screw 7 and anti-loosening washer 8 significantly enhances the anti-loosening ability of the connection, maintaining the tightness and reliability of the connection even under the continuous vibration and impact generated by the long-term high-intensity operation of the coal mining machine rocker arm. This not only greatly improves the overall stability of the cooler 1 inside the rocker arm housing 101 and reduces the risk of displacement or damage due to insufficient central support, but also the two-part structure provides great convenience for the installation, disassembly and maintenance of the cooler 1, eliminating the need for complex operations on the entire cooler, thereby improving work efficiency and equipment reliability.

[0050] In some embodiments described above, the cooler 1 is fixedly connected to the rocker arm housing 101 via a two-part locking structure in the middle. The upper locking block 6 and lower locking block 5 are symmetrically engaged on the outer side of the middle portion of the cooler 1 and then fixed to the rocker arm housing 101 by screws 7 and anti-loosening washers 8. However, in practical applications, manufacturing tolerances or long-term vibration and wear may cause uneven clearance between the cooler 1 and the locking blocks, affecting the stability of the fixation. Simultaneously, if effective sealing measures are not taken when screws 7 pass through the rocker arm housing 101 for fixation, there is a risk of oil leakage from the screw holes, thus affecting the normal operation and service life of the coal mining machine rocker arm.

[0051] In this regard, this application further proposes that, based on the above-mentioned two-half-type locking structure, an adjusting pad 11 is provided in the slot of the lower locking block 5, and a screw plug 9 and a combination washer 10 are fitted on the outside of the screw 7. The screw plug 9 and the combination washer 10 cooperate to achieve an oil-proof seal for the rocker arm housing 101.

[0052] Specifically, the adjusting shim 11 is a component used to precisely adjust the fit clearance, compensate for manufacturing tolerances, or absorb local stress. It can be made of materials with a certain degree of elasticity and wear resistance, such as polytetrafluoroethylene, nylon, rubber, or thin metal sheets. By setting the adjusting shim 11 in the slot of the lower clamping block 5, adjusting shims of different thicknesses can be selected according to the actual assembly situation to ensure a tight and uniform fit between the cooler 1 and the lower clamping block 5. This effectively eliminates gaps caused by tolerance accumulation or irregular surfaces, improving the fixing accuracy and stability of the cooler 1 in the clamping block.

[0053] Meanwhile, to address the potential oil leakage issue when screw 7 passes through rocker arm housing 101, this application includes a screw plug 9 and a combination washer 10 fitted around screw 7. Screw plug 9 is typically a threaded plug with an internal through-hole for screw 7 to pass through; its external threads match the threaded hole on rocker arm housing 101. Combination washer 10 is a composite sealing washer, typically composed of a metal washer and an elastic sealing ring, such as a rubber ring. When screw 7 is tightened, screw plug 9 is pressed into the threaded hole of rocker arm housing 101, while combination washer 10 is compressed between the contact surfaces of screw plug 9 and rocker arm housing 101. The elastic sealing ring of combination washer 10 undergoes elastic deformation under pressure, tightly conforming to the surfaces of screw plug 9 and rocker arm housing 101, forming a reliable radial and axial seal, effectively preventing oil inside rocker arm housing 101 from leaking out through the screw hole. Screw plug 9 itself also provides a physical barrier, further enhancing the sealing effect.

[0054] Through the above technical solution, an adjusting shim 11 is set in the slot of the lower locking block 5, which can effectively compensate for the manufacturing tolerance between the cooler 1 and the locking block, ensuring the tight fit and stable support of the cooler 1 in the two-half locking block fixing structure, thereby significantly improving the fixing reliability of the cooler 1 and reducing the risk of loosening and damage caused by long-term vibration. At the same time, the screw plug 9 and the combination washer 10 are fitted on the outside of the screw 7, and the synergistic effect of the screw plug 9 and the combination washer 10 is used to form a reliable oil leakage seal at the connection where the screw 7 passes through the rocker arm housing 101. This not only effectively prevents the leakage of oil inside the rocker arm housing 101, ensuring the normal lubrication and cooling function of the coal mining machine rocker arm, but also avoids the pollution caused by oil leakage to the environment, extends the service life of the equipment, and improves the overall system's operational safety and economy.

[0055] In some embodiments described above, the cooler 1 is fixedly connected to the rocker arm housing 101 via a three-section support structure, wherein the flange fixing structure at the front end and the two-half-type locking block fixing structure in the middle provide effective support. However, under the working environment of long-term high-intensity vibration of the coal mining machine rocker arm, if the tail end fixing method of the cooler 1 is not stable enough or there are gaps, the cooler 1 may still experience slight axial or radial movement or shaking, thereby affecting the stability of the overall fixing structure and increasing the risk of the cooler 1 being damaged or leaking due to fatigue.

[0056] In response, this application further proposes a support shaft locking structure at the tail end of the cooler 1, including a support shaft 12. The front end of the support shaft 12 is provided with an axially extending slotted structure, which is interference-fitted with the tail end shaft of the cooler 1. The end of the support shaft 12 away from the slotted structure extends into the rocker arm housing 101 and is clearance-fitted with the rocker arm housing 101.

[0057] Specifically, the support shaft 12 is a rod- or columnar member used to provide support and positioning. Its main function is to bear part of the weight of the tail section of the cooler 1 and restrict its movement. The support shaft 12 can be made of a high-strength, wear-resistant metal material, such as alloy steel, to ensure its reliability under harsh operating conditions. Its shape can be a solid cylinder or a hollow cylinder, depending on the required strength and weight.

[0058] The axially extending slotted structure refers to a slot opened along the central axis of the front end of the support shaft 12. This slotted structure can be a single slot, multiple symmetrically distributed slots, or a keyway. Its design aims to form a precise fit with the tail end shaft of the cooler 1, ensuring a secure connection during subsequent assembly. The dimensions and shape of this slotted structure are precisely designed to ensure accurate fitting with the tail end shaft of the cooler 1.

[0059] The interference fit between the slotted structure and the tail shaft of the cooler 1 means that during assembly, the inner diameter of the slotted structure is slightly smaller than the outer diameter of the tail shaft of the cooler 1. Pressure is applied to press the two together, thus forming a tight, gapless connection. This interference fit generates radial clamping force, which firmly clamps the tail shaft of the cooler 1 within the slotted structure of the support shaft 12, effectively preventing relative movement of the cooler 1 in the axial and radial directions.

[0060] Through the above technical solution, the support shaft 12 and its axially extending slotted structure at its front end are connected to the tail shaft of the cooler 1 by an interference fit, which greatly enhances the fixing strength and stability of the tail end of the cooler 1. This connection method can effectively resist the strong vibration and impact generated by the rocker arm of the coal mining machine during operation, preventing the tail of the cooler 1 from loosening, shifting, or shaking. In view of this, the overall three-point support structure of the cooler 1 is further improved, ensuring the precise position and long-term stability of the cooler 1 inside the rocker arm housing 101, thereby significantly reducing the risk of connection fatigue, component wear, and water leakage of the cooler 1 caused by vibration, and improving the reliability and service life of the coal mining machine cooling system.

[0061] In some embodiments of this application, the cooler 1 is fixedly connected to the rocker arm housing 101 via a three-section support structure, wherein the tail end adopts a structure in which the support shaft 12 is interference-fitted with the tail end shaft of the cooler 1. However, during the long-term operation of the coal mining machine rocker arm, especially under the action of severe vibration and impact loads, the support shaft 12 may still be at risk of slight displacement or movement along its axial direction. This may lead to loosening of the interference fit, thereby affecting the long-term stability and reliability of the tail end support, and may even adversely affect the overall sealing performance.

[0062] To address this, this application further proposes an anti-rotation pressure plate 13 at the outer end of the support shaft 12. The anti-rotation pressure plate 13 is fixed to the support shaft 12 by bolts 14 and adjacent anti-loosening washers 3, thereby restricting the axial movement of the support shaft 12. The support shaft 12 is provided with a mounting groove that matches the sealing ring 4, and the adjacent sealing ring 4 is embedded in the mounting groove.

[0063] Specifically, the anti-rotation pressure plate 13 is a mechanical component used to provide axial restraint and prevent rotation. It is typically designed as a plate-like structure with a specific shape; for example, it can be a flat metal plate with holes whose shape matches the outer end profile of the support shaft 12, or at least allows for a tight fit with the outer end of the support shaft 12. The anti-rotation pressure plate 13 can be made of high-strength steel or other wear-resistant materials to withstand the impacts and vibrations generated during the operation of the coal mining machine. Its main function is to cooperate with the outer end of the support shaft 12 to form a physical barrier, thereby preventing displacement of the support shaft 12 along its axial direction and potentially assisting in preventing its rotation. The bolt 14 is a standard fastener used to reliably secure the anti-rotation pressure plate 13 to the support shaft 12. The bolt 14 typically passes through a pre-drilled hole in the anti-rotation pressure plate 13 and screws into a corresponding threaded hole in the support shaft 12. To ensure a strong connection and vibration resistance, the bolt 14 can be made of a high-strength material and can be used in conjunction with anti-loosening measures such as locking washers and thread-locking adhesive. The tightening force of bolt 14 ensures that the anti-rotation pressure plate 13 can effectively apply axial restraint force to the support shaft 12. This technical feature of limiting the axial movement of the support shaft 12 aims to solve the problem of slippage or displacement of the support shaft 12 along its axial direction that may occur during operation. Through the cooperation between the anti-rotation pressure plate 13 and the support shaft 12 and the tightening of bolt 14, the support shaft 12 is firmly locked in its predetermined position and cannot move back and forth. This axial limit is crucial for maintaining a stable three-point support structure between the cooler 1 and the rocker arm housing 101. It ensures that the tail end of the cooler 1 is always in the correct position, avoiding loosening of the connection, failure of the seal, or structural damage caused by axial movement.

[0064] Through the above technical solution, an anti-rotation pressure plate 13 is set at the outer end of the support shaft 12 and fixed to the support shaft 12 with bolts 14. This application effectively provides reliable axial limiting for the support shaft 12. When the coal mining machine rocker arm is working, even in the event of severe vibration and impact, the anti-rotation pressure plate 13 can form a solid physical barrier through its tight fit with the support shaft 12 and the tightening effect of the bolts 14, thereby precisely limiting the axial movement of the support shaft 12. This not only further enhances the stability of the tail end support structure of the cooler 1, ensuring that the interference fit between the support shaft 12 and the tail end shaft of the cooler 1 is maintained for a long time, but also avoids loosening of the connection, wear or failure of the sealing ring 4 due to axial displacement, thereby significantly reducing the risk of water leakage of the cooler 1 and extending the service life of the entire fixing structure. This solution, together with the flange fixing structure at the front end and the two-half locking block fixing structure in the middle, makes the cooler 1 more comprehensively and reliably fixed along the entire length direction, greatly improving the operational reliability of the coal mining machine rocker arm cooler under harsh working conditions.

[0065] In some embodiments described above, a scheme is proposed to fix the cooler to the rocker arm housing using a three-section support structure, aiming to avoid damage to the cooler due to rocker arm vibration and reduce the risk of leakage. However, if the structure of the cooler and the arrangement of the support points are not sufficiently matched, the cooler may still have local stress concentration or uneven overall support under long-term vibration, thereby affecting its stability and service life, and may even reduce cooling efficiency.

[0066] In this regard, this application further proposes that the cooler 1 is a long tubular structure running through the length of the rocker arm, and the three-section support structure corresponds to the front end, middle and rear end of the cooler 1 respectively, so as to realize the three-point support and fixation of the cooler 1 along the entire length.

[0067] Specifically, the cooler 1 is designed as a long tubular structure, with its length aligned with that of the rocker arm. This long tubular structure maximizes the contact area between the cooler 1 and the cooling medium, thereby improving cooling efficiency and allowing full utilization of the space inside the rocker arm housing 101. Simultaneously, its slender geometry provides a basis for multi-point support. A three-section support structure—the flange fixing structure at the front, the two-half-type locking block fixing structure in the middle, and the support shaft locking structure at the rear—is precisely arranged at the front, middle, and rear ends of the cooler 1. This correspondence ensures that the cooler 1 receives effective support along its entire length, avoiding excessive local stress caused by overly concentrated or unevenly distributed support points. Through this arrangement, a three-point support fixation of the cooler 1 is achieved along its entire length. This means that the cooler 1 is not only fixed at both ends but also effectively supported in its middle, forming a stable support system. This three-point fixation effectively resists the complex vibrations and impact loads generated by the coal mining machine rocker arm during operation, preventing the cooler 1 from bending, twisting, or axially shifting.

[0068] Through the above technical solution, the cooler 1 is designed as a long tubular structure running longitudinally along the rocker arm, with the three-section support structure precisely corresponding to its front, middle, and rear ends, thus achieving three-point support and fixation of the cooler 1 along its entire length. This combination of structural design and support method significantly enhances the overall rigidity and vibration resistance of the cooler 1. The flange fixing structure at the front end, the two-half clamping block fixing structure in the middle, and the support shaft clamping structure at the rear end work together at three key locations of the cooler 1, effectively dispersing the dynamic load generated during operation and avoiding localized stress concentration. This not only greatly reduces the risk of fatigue damage to the cooler 1 due to long-term vibration but also effectively prevents seal failure at the connection between the cooler 1 and the rocker arm housing 101, thus fundamentally solving the leakage problem. Simultaneously, the stable support ensures smooth fluid flow and efficient heat exchange inside the cooler 1, guaranteeing the reliable operation and long service life of the coal mining machine rocker arm cooling system.

[0069] In the aforementioned fixed structure of the rocker arm cooler of the coal mining machine, the cooler 1 is fixedly connected to the rocker arm housing 101 through a multi-point support structure. Among them, bolts 14, screw 12, and screw 27 are key connecting parts, bearing the severe vibration and impact loads generated during the operation of the rocker arm. If the strength of these connecting parts is insufficient, it may lead to loosening or even breakage, thereby affecting the fixed reliability of the cooler 1 and increasing the risk of water leakage.

[0070] In this regard, this application further proposes that bolt 14, screw 12, and screw 27 are all made of high-strength alloy material. High-strength alloy material refers to metallic materials that, through precise control of alloy composition and combined with advanced heat treatment processes and manufacturing technologies, possess yield strength, tensile strength, and fatigue strength far exceeding that of ordinary metallic materials while maintaining good toughness. Specifically, this can be achieved by: First, selecting appropriate alloying elements, such as chromium, nickel, molybdenum, vanadium, and titanium, based on the required strength level and working environment, and improving the overall mechanical properties of the material through mechanisms such as solid solution strengthening, precipitation strengthening, or grain boundary strengthening. For example, adding elements such as chromium and molybdenum to alloy steel can significantly improve hardenability and strength. Second, employing heat treatment processes such as quenching, tempering, normalizing, and solution treatment, and precisely controlling parameters such as heating temperature, holding time, and cooling rate to obtain an ideal microstructure, such as fine-grained martensite, bainite, or precipitates, thereby maximizing the strength potential of the alloy material. Furthermore, the manufacturing processes of bolt 14, screw 2, and screw 7, such as cold heading and thread rolling, must be strictly controlled to ensure the geometric accuracy and surface quality of the threads, avoid stress concentration, and optimize the grain flow lines of the material to further improve fatigue life and shear resistance. By using high-strength alloy materials, it is intended to ensure that bolt 14, screw 2, and screw 7 can withstand huge dynamic loads and static preloads under long-term, high-intensity working conditions of the coal mining machine rocker arm, and are not prone to plastic deformation, fatigue damage, or fracture, thus providing a solid guarantee for the stable fixation of cooler 1.

[0071] Through the above technical solution, given that bolt 14, screw 2, and screw 7 are all made of high-strength alloy material, their tensile strength, yield strength, and fatigue strength are significantly improved. This enables these key connecting components to effectively resist the severe vibration, impact, and shearing forces generated by the coal mining machine rocker arm during operation, thereby avoiding the risks of loose connections, stripped threads, or breakage. This ensures a more robust and reliable fixed connection between the cooler 1 and the rocker arm housing 101, greatly enhancing the stability and durability of the entire fixed structure under harsh working conditions, effectively reducing the probability of cooler 1 being damaged by vibration, and further preventing water leakage accidents, thereby improving the operational reliability and safety of the coal mining machine equipment.

[0072] In some embodiments described above, the rocker arm cooler fixing structure of the coal mining machine is connected using bolts, screws, and other fasteners made of high-strength alloy materials to ensure structural strength and reliability. However, during long-term operation, the rocker arm of the coal mining machine is inevitably subjected to severe vibration and impact. This continuous dynamic load may cause the threaded connections of the fasteners to gradually loosen, thereby affecting the stability of the cooler fixing and even causing connection failure, increasing the risk of equipment malfunction.

[0073] In this regard, this application further proposes that the thread surfaces of bolt 14, screw 12 and screw 27 are all coated with anti-loosening adhesive to enhance the connection stability.

[0074] The rocker arm housing 101 has a pre-set hole adapted to the flange of the cooler 1 and a reserved hole adapted to the support shaft 12. The pre-set hole only needs to be machined on the front end stop sealing surface, and there is no coaxiality machining requirement between the pre-set hole and the reserved hole.

[0075] Specifically, anti-loosening adhesive is a liquid or semi-solid polymer that, after being applied to the surface of threaded fasteners, cures in the absence of air, forming a strong film. This film effectively fills the tiny gaps between the threaded parts, increases the friction of the threaded connection, and provides a certain degree of adhesive strength, thereby effectively preventing the threaded connection from loosening due to vibration, impact, or thermal expansion and contraction. The application method of anti-loosening adhesive can be selected according to actual production needs and application scenarios. For example, it can be applied manually, precisely applied using automated dispensing equipment, or pre-coated threaded fasteners can be used directly. When selecting anti-loosening adhesive, different types of anaerobic or epoxy adhesives can be selected based on the required anti-loosening strength, temperature resistance, oil resistance, and ease of subsequent disassembly. For example, high-strength anaerobic adhesives can be used for critical connection parts that require high-strength anti-loosening and are not easily disassembled; while medium-strength anaerobic adhesives can be used for parts that require medium-strength anti-loosening and allow for subsequent disassembly. Applying anti-loosening adhesive to the threaded surfaces of bolt 14, screw 12, and screw 27 can significantly improve the connection stability of these critical fasteners.

[0076] Through the above technical solution, the adhesive layer formed after the anti-loosening adhesive cures can effectively fill the thread gaps and provide additional adhesive force, thereby greatly increasing the friction and shear resistance between the threaded pairs. This allows bolts 14, screw 2, and screw 7 to remain tight even under the long-term severe vibration and impact conditions of the coal mining machine rocker arm, effectively suppressing relative rotation and loosening of the threaded connection. Given that bolts 14, screw 2, and screw 7 are all made of high-strength alloy material, the introduction of anti-loosening adhesive further enhances the reliability of the connection, forming a dual anti-loosening mechanism with the synergistic effect of high-strength fasteners and anti-loosening adhesive. This not only ensures the long-term stable fixation of the three-section support structure between the cooler 1 and the rocker arm housing 101, effectively avoiding the risk of damage and leakage to the cooler 1 due to fastener loosening, but also significantly extends the service life of the coal mining machine rocker arm cooler fixing structure, reduces the equipment maintenance frequency and operating costs, and improves the continuity and safety of coal mining operations.

[0077] The following example will provide a more detailed explanation of the above technical solution: At a large coal mine operation site, a high-powered coal mining machine is operating continuously. After prolonged high-load operation, the temperature of the oil in the internal reducer of the machine's rocker arm continuously rises, causing the rocker arm to overheat and affecting the normal operating efficiency and reliability of the equipment. To effectively control the operating temperature of the rocker arm, a long tubular cooler 1 running longitudinally along the length of the rocker arm is installed inside to remove the heat generated by the oil. However, traditional methods of fixing the cooler, such as welding fixing blocks on-site or machining through holes, often result in unstable welding quality or difficulty in ensuring coaxiality during machining, leading to the cooler 1 loosening, being damaged, or even leaking when the rocker arm vibrates violently.

[0078] To address this issue, the rocker arm of this coal mining machine employs a novel cooler fixing structure. During cooler 1 installation, the front end of cooler 1 is first connected to the rocker arm housing 101. Specifically, the flange at the front end of cooler 1 is fitted against the corresponding mounting surface of the rocker arm housing 101 and is detachably fixed using high-strength alloy screws 2 and anti-loosening washers 3. A sealing ring 4 is embedded between the mating surfaces of the flange and the rocker arm housing 101. This sealing ring 4 not only effectively separates the water flow through the rocker arm housing 101, preventing water-oil mixing, but also seals the oil inside the rocker arm housing 101, avoiding the risk of oil leakage at the front end. This flange fixing method avoids the quality uncertainties associated with on-site welding, ensuring the reliability of the connection.

[0079] Next, the middle section of the cooler 1 is fixed. The middle section is fixed using a two-part locking structure, consisting of an upper locking block 6 and a lower locking block 5. These two blocks symmetrically engage with the outer side of the middle section of the cooler 1, forming a circumferential support. Subsequently, the upper locking block 6 and the lower locking block 5 are fixedly connected using high-strength alloy screws 7 and anti-loosening washers 8, and the entire assembly is then assembled onto the rocker arm housing 101. It is worth noting that the lower locking block 5 has an adjusting shim 11 in its slot, which allows for fine-tuning of the cooler 1's position during installation to accommodate the machining tolerances of the rocker arm housing 101, preventing bending and weld cracking of the cooler 1 due to insufficient coaxiality in the long hole machining. Furthermore, screws 7 are externally fitted with plugs 9 and combination washers 10. The plugs 9 and combination washers 10 work together to achieve an oil-leakage seal in this fixed area of ​​the rocker arm housing 101, further improving the system's reliability.

[0080] Finally, the tail end of the cooler 1 is supported and secured. The tail end support shaft securing structure includes a support shaft 12. The front end of the support shaft 12 has an axially extending slotted structure, which is interference-fitted with the tail end shaft of the cooler 1, providing stable radial support. To limit the axial movement of the support shaft 12, an anti-rotation pressure plate 13 is provided at the outer end of the support shaft 12, which is fixed to the support shaft 12 by high-strength alloy bolts 14. This design ensures that the tail end of the cooler 1 will not experience axial displacement during rocker arm operation vibration, further enhancing overall stability.

[0081] Throughout the fixing process, anti-loosening adhesive was applied to the threaded surfaces of bolt 14, screw 2, and screw 7. This anti-loosening adhesive, together with anti-loosening washers 3 and 8, significantly enhanced the stability of each connection point, effectively resisting the severe vibrations generated by the coal mining machine rocker arm during operation and preventing the threaded connections from loosening.

[0082] Through the aforementioned flange fixing structure at the front end, the two-half clamping block fixing structure in the middle, and the support shaft clamping structure at the rear end, the cooler 1 achieves three-point support and fixation along its entire length. This three-section support structure not only provides strong shock resistance, effectively preventing damage to the cooler 1 due to vibrations from the rocker arm operation, but also significantly reduces the risk of water and oil leakage through multiple sealing designs, including the cooperation of the sealing ring 4, the screw plug 9, and the combined washer 10. Compared with existing technologies, this solution avoids the problem of difficult-to-guarantee on-site welding quality and solves the problem of installation difficulties and water leakage caused by poor coaxiality in long hole machining, thereby ensuring the long-term stable operation of the rocker arm cooler 1 of the coal mining machine and improving the overall reliability of the coal mining machine.

[0083] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

[0084] Specifically, the working principle of the new type of rocker arm cooler fixing structure of the coal mining machine is as follows: The long tubular cooler 1, which runs through the length of the rocker arm, is supported by a three-point structure consisting of a front flange fixing structure, a middle two-half clamping block fixing structure, and a tail support shaft clamping structure. It is stably connected to the rocker arm housing 101. The flange with sealing ring 4 at the front end of the cooler 1 is fixed by screw 12 and anti-loosening washer 13. Adjacent sealing rings 4 separate water flow and seal oil. The upper clamping block 6 and lower clamping block 5 in the middle are fastened together by screw 27 and anti-loosening washer 28. The adjusting shim 11 in the groove compensates for the assembly gap. The screw plug 9 outside screw 27 and the combination washer 10 prevent oil leakage. The tail support shaft 12 is interference-fitted by the front slotted structure. The sealing ring 4 on the tail shaft of cooler 1 and the support shaft 12 enhances the sealing effect. The outer anti-rotation pressure plate 13 restricts the movement of the support shaft 12 by bolts 14 and adjacent anti-loosening washers 3. Bolts 14, screws 1 and 2 are made of high-strength alloy material and coated with anti-loosening glue to ensure a stable connection. The pre-set holes and reserved holes on the rocker arm housing 101 have no coaxiality requirement to avoid the weld of cooler 1 being broken. The three-section support works together to buffer the working vibration of the rocker arm, prevent cooler 1 from swinging and causing weld failure and water leakage, and avoid the risk of the welded fixing block falling off. It ensures that cooler 1 continuously removes the heat of the oil in the rocker arm reducer, keeps the gears and bearings of the rocker arm transmission system well lubricated, and ensures the stable and efficient operation of the coal mining machine rocker arm.

[0085] The electronic components and models used in this invention can be customized according to actual usage requirements.

[0086] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0087] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A novel fixing structure for a rocker arm cooler in a coal mining machine, characterized in that, It includes a cooler (1) and a rocker arm housing (101). The cooler (1) is fixedly connected to the rocker arm housing (101) through a three-section support structure. The three-section support structure is a flange fixing structure at the front end, a two-half-type locking block fixing structure in the middle, and a support shaft locking structure at the rear end. This is used to prevent the cooler (1) from being damaged by the vibration of the rocker arm and to reduce the risk of water leakage.

2. The novel rocker arm cooler fixing structure of a coal mining machine according to claim 1, characterized in that, The flange fixing structure at the front end of the cooler (1) includes a flange disposed at the front end of the cooler (1). The flange is detachably fixed to the rocker arm housing (101) by a screw (2) and an anti-loosening washer (3) disposed on its surface. A sealing component is assembled on the flange.

3. The novel rocker arm cooler fixing structure of a coal mining machine according to claim 2, characterized in that, The sealing component is a sealing ring (4), which is embedded between the flange and the contact surface of the rocker arm housing (101) to separate the water flow through the rocker arm housing (101) and seal the oil inside the rocker arm housing (101).

4. The novel rocker arm cooler fixing structure of a coal mining machine according to claim 3, characterized in that, The two-part locking structure in the middle of the cooler (1) includes an upper locking block (6) and a lower locking block (5). The upper locking block (6) and the lower locking block (5) are symmetrically fastened to the outer side of the middle part of the cooler (1) and are fixedly connected by screws (7) and anti-loosening washers (8) and then assembled on the rocker arm housing (101).

5. The novel rocker arm cooler fixing structure of a coal mining machine according to claim 4, characterized in that, The lower locking block (5) has an adjusting pad (11) in its slot. The screw two (7) is fitted with a screw plug (9) and a combination washer (10). The screw plug (9) and the combination washer (10) work together to achieve an oil-proof seal for the rocker arm housing (101).

6. The novel rocker arm cooler fixing structure of a coal mining machine according to claim 5, characterized in that, The support shaft locking structure at the tail end of the cooler (1) includes a support shaft (12). The front end of the support shaft (12) is provided with a slotted structure extending along the axial direction. The slotted structure is interference-fitted with the tail end shaft of the cooler (1).

7. The novel rocker arm cooler fixing structure of a coal mining machine according to claim 6, characterized in that, The outer end of the support shaft (12) is provided with an anti-rotation pressure plate (13), which is fixed to the support shaft (12) by bolts (14) to restrict the axial movement of the support shaft (12).

8. The novel rocker arm cooler fixing structure of a coal mining machine according to claim 7, characterized in that, The cooler (1) is a long tubular structure that runs through the length of the rocker arm. The three-section support structure corresponds to the front end, middle and rear end of the cooler (1) respectively, so as to realize the three-point support and fixation of the cooler (1) along the entire length.

9. The novel rocker arm cooler fixing structure of a coal mining machine according to claim 8, characterized in that, The bolt (14), screw one (2) and screw two (7) are all made of high-strength alloy material.

10. The novel rocker arm cooler fixing structure of a coal mining machine according to claim 9, characterized in that, The threaded surfaces of the bolts (14), screw one (2) and screw two (7) are all coated with anti-loosening adhesive to enhance connection stability.

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