A shearer rocker arm planetary mechanism and anti-vibration recoil mounting method

Abstract

This invention discloses a planetary rocker arm mechanism for a coal mining machine and a vibration-resistant and impact-resistant installation method, comprising: a rocker arm housing, with a plurality of sets of circumferentially spaced recessed tenons on the outer side of the end face of the rocker arm housing; an internal gear ring, which is a cylindrical structure, with a plurality of sets of circumferentially spaced mounting through holes on its sidewall, the axes of the mounting through holes being arranged parallel to the axis of the internal gear ring, and bosses detachably connected to the mounting through holes, the bosses corresponding to the recessed tenons; a bearing bracket, which is detachably connected to the other end of the internal gear ring; and a square connecting sleeve, which is detachably connected to the bearing bracket; wherein a pressure plate is provided between the square connecting sleeve and the bearing bracket. This invention structurally solves the problems of screw breakage and loose connection that are prone to occur in traditional wire-driven structures, and enhances the overall vibration-resistant and impact-resistant performance of the mechanism.

Description

Technical Field

[0001] This invention relates to the field of coal mining machinery technology, and in particular to a planetary mechanism for a coal mining machine rocker arm and a vibration-resistant and anti-impact installation method. Background Technology

[0002] my country has abundant reserves of thin coal seams. However, with the accelerated mining of medium-thick coal seams over the past decade, the easily exploitable medium-thick coal seams in most domestic mines are becoming increasingly depleted, making thin coal seam mining an inevitable choice for coal extraction. Simultaneously, coal mining operations in my country are extending deeper year by year, and many mining areas face complex conditions such as mining high-quality coal resources in thin coal seams, rock bursts, coal and gas outbursts, and the coordinated mining of nearby high-gas coal seam groups. To achieve pressure relief and outburst prevention in high-gas outburst-prone coal seam groups, the industry often chooses to mine relatively thin coal seams adjacent to the mining area as the release layer.

[0003] During the mining of the Jiefang Formation, the coal mining machine needs to traverse the entire rock section. The rock mass in the entire rock section is extremely hard, which causes the coal mining machine to be subjected to huge cutting impacts and loads during mining. This places stringent requirements on the structural strength of the coal mining machine's rocker arm, the wear resistance of its components, and the tightness of its connections. Existing planetary rocker arm mechanisms in coal mining machines exhibit numerous structural defects and operational problems under such complex working conditions: First, the connection between the planetary mechanism and the rocker arm housing uses a three-set wire-supported structure. The high cutting resistance and strong vibrations during the mining of the release layer easily cause the fixing screw to break. After the screw breaks, it can also cause problems such as wire pulling in the screw holes and deformation of the bolt holes, directly resulting in a loose connection between the planetary mechanism and the housing. Second, if the planetary mechanism and the housing become loose, it can cause oil leakage from the floating oil seal. The oil seal leakage causes oil shortage inside the mechanism and generates high temperatures, which in turn leads to damage to the internal gear components and ultimately causes the planetary mechanism to seize up. Third, severe impact and load conditions can also cause wear on the surface of the rocker arm housing, damage to the internal gear ring, and damage to the external splines of the planetary carrier. At the same time, debris and foreign matter are easily generated inside the rocker arm housing, and the ball bearings and cage may also break inside the cavity. All of the above problems seriously affect the normal mining operation of the coal mining machine, reduce the service life of the equipment, and reduce operational stability.

[0004] Based on the above-mentioned technical problems, the present invention provides a planetary mechanism for the rocker arm of a coal mining machine and a vibration-resistant and anti-impact installation method. Summary of the Invention

[0005] The purpose of this invention is to provide a planetary mechanism for the rocker arm of a coal mining machine and a vibration-resistant and anti-impact installation method to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides a planetary rocker arm mechanism for a coal mining machine, comprising: The rocker arm housing has several sets of recessed tenons evenly spaced around the outer side of its end face. An internal gear ring, which is a cylindrical structure, has several sets of mounting through holes evenly spaced circumferentially on its side wall. The axis of the mounting through holes is arranged parallel to the axis of the internal gear ring. A boss is detachably connected to the mounting through hole, and the boss is arranged correspondingly to the inner tenon groove. A bearing housing, which is detachably connected to the other end of the internal gear ring; A square connecting sleeve, which is detachably connected to the bearing bracket; A pressure plate is provided between the square connecting sleeve and the bearing bracket.

[0007] According to the planetary rocker arm mechanism of the coal mining machine provided by the present invention, a floating oil seal is provided between the square connecting sleeve and the pressure plate. The floating oil seal, pressure plate, bearing bracket and internal gear ring are arranged in sequence along the axial direction of the rocker arm housing. The floating oil seal, pressure plate, bearing bracket and internal gear ring are detachably fixed to the rocker arm housing by a number of bolt assemblies.

[0008] According to the planetary rocker arm mechanism of the coal mining machine provided by the present invention, the inner concave tenon groove of the rocker arm housing is a U-shaped groove structure, and bolt mounting holes are provided on the end face of the boss facing the rocker arm housing. The bolt mounting holes are arranged in pairs.

[0009] According to the planetary rocker arm mechanism of the coal mining machine provided by the present invention, the rocker arm housing is provided with bolt through holes corresponding one-to-one with the bolt mounting holes of the boss, and the side of the rocker arm housing away from the internal gear ring is provided with a countersunk hole that communicates with the bolt through holes. The countersunk hole and the bolt through holes are arranged coaxially.

[0010] According to the planetary rocker arm mechanism of the coal mining machine provided by the present invention, the connecting surfaces of the inner gear ring and the rocker arm housing are provided with fixing pin holes, and the fixing pin holes on the inner gear ring and the fixing pin holes on the rocker arm housing are one-to-one corresponding and coaxially arranged.

[0011] According to the planetary rocker arm mechanism of the coal mining machine provided by the present invention, an anti-loosening gasket is embedded in the groove hole of the rocker arm housing. The anti-loosening gasket has an annular plate structure, and the central through hole of the anti-loosening gasket is coaxially arranged with the bolt through hole of the rocker arm housing.

[0012] According to the planetary mechanism of the rocker arm of the coal mining machine provided by the present invention, the boss and the inner tenon groove are both set in two sets. The two sets of bosses are symmetrically distributed along the circumference of the inner gear ring, and the two sets of inner tenon grooves are symmetrically distributed along the circumference of the rocker arm housing. The shape of the boss is adapted to the groove shape of the inner tenon groove and the boss is fitted into the inner tenon groove.

[0013] A vibration-resistant and shock-resistant installation method for a rocker arm planetary mechanism of a coal mining machine includes the following steps: Step 1: Assemble the boss and the internal gear ring. Install the boss into the mounting through hole on the side wall of the internal gear ring to complete the detachable connection between the boss and the internal gear ring. Ensure that the bosses are evenly spaced along the circumference of the internal gear ring and that the installation position of the boss matches the position of the recessed tenon on the end face of the rocker arm housing. Step 2: Connect the bearing bracket to the internal gear ring with the boss assembly completed. Install the bearing bracket to the end of the internal gear ring away from the rocker arm housing to complete the detachable fixing of the bearing bracket and the internal gear ring. Step 3: Place the pressure plate on the end face of the bearing bracket away from the internal gear ring, so that the pressure plate fits against that end face of the bearing bracket, thus completing the positioning and placement of the pressure plate. Step 4: Install the square connecting sleeve onto the side of the pressure plate away from the bearing frame to complete the detachable connection between the square connecting sleeve and the bearing frame, so that the pressure plate is clamped between the square connecting sleeve and the bearing frame, forming the pre-assembled coal mining machine rocker arm planetary mechanism as a whole. Step 5: Connect the pre-assembled planetary mechanism to the rocker arm housing, aligning the bosses on the internal gear ring with the inner tenons on the outer side of the rocker arm housing end face, so that the bosses fit into the corresponding inner tenons, thus achieving circumferential positioning of the planetary mechanism and the rocker arm housing. Step six: Tighten all detachable connections between the planetary mechanism and the rocker arm housing, as well as between the various components of the planetary mechanism, to complete the overall vibration-resistant and impact-resistant installation of the coal mining machine rocker arm planetary mechanism.

[0014] The present invention discloses the following technical effects: This device forms a mortise and tenon joint structure through the corresponding arrangement of the boss and the concave tenon groove, and both are evenly spaced in the circumference, which greatly improves the connection and tightness between the internal gear ring and the rocker arm housing. It can effectively resist the torque and impact load generated by the cutting of the coal mining machine drum. Structurally, it solves the problems of screw breakage and loose connection that are prone to occur in traditional wire-carrying structures, and strengthens the overall vibration and impact resistance of the mechanism.

[0015] The components of the device adopt a modular and detachable connection design. The boss and internal gear ring, the bearing bracket and internal gear ring, and the square connecting sleeve and bearing bracket are all detachable. The clamping arrangement of the pressure plate makes the components distinct and the assembly and disassembly operations convenient. During subsequent equipment maintenance, individual components can be disassembled and assembled in a targeted manner without the need for overall disassembly, which significantly reduces the difficulty of on-site maintenance.

[0016] The fitting of the boss and the inner groove enables precise circumferential positioning of the internal gear ring and the rocker arm housing. Combined with the circumferentially spaced mounting through holes and boss, the impact load and force during the operation of the coal mining machine can be evenly distributed in each connection part, avoiding the problem of local stress concentration, reducing failures such as housing wear and damage to the internal gear ring, and effectively extending the service life of each component of the planetary mechanism. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is an exploded view of the rocker arm planetary mechanism of the coal mining machine of the present invention; Figure 2 This is an isometric view of the rocker arm planetary mechanism of the coal mining machine of the present invention.

[0019] The components include: 1. rocker arm housing; 2. internal gear ring; 3. bearing bracket; 4. square connecting sleeve; 5. pressure plate; and 6. floating oil seal. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Reference Figures 1-2 The present invention provides a planetary mechanism for a rocker arm of a coal mining machine, comprising: The rocker arm housing 1 has several sets of recessed tenons evenly spaced around the outer side of its end face. The internal gear ring 2 is a cylindrical structure. Several sets of mounting through holes are evenly spaced around the side wall of the internal gear ring 2. The axis of the mounting through holes is arranged parallel to the axis of the internal gear ring 2. A boss is detachably connected to the mounting through hole, and the boss and the inner recessed tenon are arranged accordingly. Bearing bracket 3 is detachably connected to the other end of internal gear ring 2; Square connecting sleeve 4 is detachably connected to bearing bracket 3; A pressure plate 5 is provided between the square connecting sleeve 4 and the bearing bracket 3.

[0023] In a further optimized design, a floating oil seal 6 is provided between the square connecting sleeve 4 and the pressure plate 5. The floating oil seal 6, pressure plate 5, bearing bracket 3, and internal gear ring 2 are arranged in sequence along the axial direction of the rocker arm housing 1. The floating oil seal 6, pressure plate 5, bearing bracket 3, and internal gear ring 2 are detachably and fixedly connected to the rocker arm housing 1 through several sets of bolt assemblies.

[0024] A floating oil seal 6 is installed between the square connecting sleeve 4 and the pressure plate 5. The sealing structure characteristics of the floating oil seal 6 are used to block the leakage channel of the lubricating oil inside the mechanism, so as to achieve a sealing and leak-proof effect. The floating oil seal 6, pressure plate 5, bearing bracket 3, and internal gear ring 2 are arranged in sequence along the axis of the rocker arm housing 1 to ensure the coaxiality and fit of each component, so that the load is evenly transmitted along the axis. The above components are detachably fixed to the rocker arm housing 1 by several sets of bolt assemblies, so that each component forms an integrated connection structure, improving the overall connection tightness and vibration resistance.

[0025] Further optimization of the design: the inner recessed tenon groove of the rocker arm housing 1 is a U-shaped groove structure, and bolt mounting holes are provided on the end face of the boss facing the rocker arm housing 1. The bolt mounting holes are arranged in groups of two.

[0026] The inner recessed tenon groove of the rocker arm housing 1 is designed as a U-shaped groove structure. The groove structure of the U-shaped groove forms a precise fit with the boss, realizing circumferential positioning and effectively resisting the torque generated by the coal mining machine. Two bolt mounting holes are set on the end face of the boss facing the rocker arm housing 1, so that the connection between the single set of bosses and the rocker arm housing 1 forms a pair of force points, dispersing the local stress at the connection part of the boss, improving the connection strength between the single set of bosses and the rocker arm housing 1, and avoiding connection failure caused by single point force.

[0027] To further optimize the design, the rocker arm housing 1 has bolt through holes that correspond one-to-one with the bolt mounting holes of the boss. The rocker arm housing 1 has a countersunk hole that communicates with the bolt through holes on the side away from the internal gear ring 2. The countersunk hole and the bolt through holes are arranged coaxially.

[0028] Bolt through holes are made in the rocker arm housing 1, corresponding one-to-one with the bolt mounting holes of the boss, to provide a through channel for the bolt assembly and ensure that the bolt assembly can accurately connect the boss and the rocker arm housing 1, so as to achieve rigid fixation of the two. On the side of the rocker arm housing 1 away from the internal gear ring 2, a countersunk hole coaxial with the bolt through hole is made to provide a dedicated installation space for subsequent anti-loosening and fastening components, to prevent fastening components from protruding from the surface of the rocker arm housing 1, and to prevent damage to components due to bumps during mining operations. At the same time, the coaxial arrangement ensures the coaxiality of the bolt installation and avoids additional stress on the bolt due to off-center load.

[0029] The design is further optimized by providing fixing pin holes on the connecting surfaces of the internal gear ring 2 and the rocker arm housing 1. The fixing pin holes on the internal gear ring 2 correspond one-to-one with the fixing pin holes on the rocker arm housing 1 and are arranged coaxially.

[0030] One-to-one coaxial fixing pin holes are opened on the connecting surfaces of the internal gear ring 2 and the rocker arm housing 1 that are in contact with each other. By installing positioning pins in the pin holes, the internal gear ring 2 and the rocker arm housing 1 can be accurately positioned radially and circumferentially, ensuring that there is no misalignment when the boss and the inner tenon are assembled, and ensuring the accuracy of the fitting. At the same time, when the mechanism is subjected to impact loads and torques, the positioning pins can share part of the force, reduce the bearing pressure of the bolt assembly, and reduce the probability of bolt assembly failure.

[0031] To further optimize the design, an anti-loosening washer is embedded in the groove hole of the rocker arm housing 1. The anti-loosening washer has an annular sheet structure, and the central through hole of the anti-loosening washer is coaxially arranged with the bolt through hole of the rocker arm housing 1.

[0032] An annular, sheet-like anti-loosening washer is embedded in the countersunk hole of the rocker arm housing 1, with the central through hole of the washer coaxial with the bolt through hole, allowing the bolt assembly to pass through the washer smoothly. The anti-loosening washer forms a stable fit and support in the countersunk hole. When the bolt assembly is tightened, the washer will undergo elastic deformation and generate a continuous preload, which counteracts the tendency of the bolt to loosen due to vibration during the operation of the coal mining machine. At the same time, the limiting effect of the countersunk hole prevents the washer from shifting, ensuring the stability and continuity of the anti-loosening effect.

[0033] The scheme is further optimized by setting two sets of bosses and inner tenons. The two sets of bosses are symmetrically distributed along the circumference of the inner gear ring 2, and the two sets of inner tenons are symmetrically distributed along the circumference of the rocker arm housing 1. The shape of the bosses matches the groove shape of the inner tenons, and the bosses are fitted into the inner tenons.

[0034] By setting both the boss and the inner tenon groove as two sets and symmetrically distributed along the circumference of the corresponding components, the connection force between the rocker arm housing 1 and the inner gear ring 2 is evenly distributed along the circumference, completely avoiding the problem of force concentration on one side and improving the overall force balance of the mechanism; the shape of the boss and the groove of the inner tenon groove are adapted to each other and achieve a tight fit, increasing the contact area between the two, improving the contact stiffness of the connection part, and enhancing the vibration resistance and impact resistance; at the same time, the two sets of symmetrical structural designs improve the interchangeability of components, and there is no need to distinguish the direction during assembly, simplifying the assembly positioning process.

[0035] A vibration-resistant and shock-resistant installation method for a rocker arm planetary mechanism of a coal mining machine includes the following steps: Step 1: Assemble the boss and the internal gear ring 2. Install the boss into the mounting through hole on the side wall of the internal gear ring 2 to complete the detachable connection between the boss and the internal gear ring 2. Ensure that the boss is evenly spaced along the circumference of the internal gear ring 2 and that the mounting position of the boss matches the position of the recessed tenon groove on the end face of the rocker arm housing 1. Step 2: Connect the bearing bracket 3 to the internal gear ring 2 after the boss assembly is completed, and install the bearing bracket 3 to the end of the internal gear ring 2 away from the rocker arm housing 1 to complete the detachable fixing of the bearing bracket 3 and the internal gear ring 2. Step 3: Place the pressure plate 5 on the end face of the bearing bracket 3 away from the internal gear ring 2, so that the pressure plate 5 fits against the end face of the bearing bracket 3, thus completing the positioning and placement of the pressure plate 5. Step 4: Install the square connecting sleeve 4 onto the side of the pressure plate 5 away from the bearing frame 3 to complete the detachable connection between the square connecting sleeve 4 and the bearing frame 3, so that the pressure plate 5 is sandwiched between the square connecting sleeve 4 and the bearing frame 3, forming the pre-assembled coal mining machine rocker arm planetary mechanism as a whole. Step 5: Connect the pre-assembled planetary mechanism to the rocker arm housing 1, and align the bosses on the internal gear ring 2 with the inner recesses on the outer side of the end face of the rocker arm housing 1 one by one, so that the bosses fit into the corresponding inner recesses, thereby achieving circumferential positioning of the planetary mechanism and the rocker arm housing 1. Step 6: Tighten all detachable connections between the planetary mechanism and the rocker arm housing 1, as well as between the various components of the planetary mechanism, to complete the overall vibration-resistant and impact-resistant installation of the coal mining machine rocker arm planetary mechanism.

[0036] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0037] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A planetary mechanism for a rocker arm of a coal mining machine, characterized in that, include: The rocker arm housing (1) has several sets of concave tenon grooves evenly spaced around the outer side of the end face of the rocker arm housing (1); The internal gear ring (2) is a cylindrical structure. The side wall of the internal gear ring (2) is provided with several sets of mounting through holes at equal intervals in the circumferential direction. The axis of the mounting through holes is arranged parallel to the axis of the internal gear ring (2). A boss is detachably connected to the mounting through hole. The boss is arranged correspondingly to the inner recessed tenon groove. Bearing bracket (3), which is detachably connected to the other end of the internal gear ring (2); A square connecting sleeve (4) is detachably connected to the bearing bracket (3); A pressure plate (5) is provided between the square connecting sleeve (4) and the bearing bracket (3).

2. The planetary mechanism for a coal mining machine rocker arm according to claim 1, characterized in that, A floating oil seal (6) is provided between the square connecting sleeve (4) and the pressure plate (5). The floating oil seal (6), pressure plate (5), bearing bracket (3), and internal gear ring (2) are arranged in sequence along the axial direction of the rocker arm housing (1). The floating oil seal (6), pressure plate (5), bearing bracket (3), and internal gear ring (2) are detachably and fixedly connected to the rocker arm housing (1) through several sets of bolt assemblies.

3. The planetary mechanism for a coal mining machine rocker arm according to claim 1, characterized in that, The inner recessed tenon groove of the rocker arm housing (1) is a U-shaped groove structure, and bolt mounting holes are provided on the end face of the boss facing the rocker arm housing (1). The bolt mounting holes are arranged in pairs.

4. The planetary mechanism for a coal mining machine rocker arm according to claim 1, characterized in that, The rocker arm housing (1) has bolt through holes that correspond one-to-one with the bolt mounting holes of the boss. The rocker arm housing (1) has a countersunk hole connected to the bolt through hole on the side away from the internal gear ring (2). The countersunk hole and the bolt through hole are arranged coaxially.

5. A planetary mechanism for a coal mining machine rocker arm according to claim 1, characterized in that, The internal gear ring (2) and the rocker arm housing (1) are connected by fixing pin holes. The fixing pin holes on the internal gear ring (2) and the fixing pin holes on the rocker arm housing (1) are one-to-one and coaxially arranged.

6. The planetary mechanism for a coal mining machine rocker arm according to claim 1, characterized in that, An anti-loosening gasket is embedded in the groove hole of the rocker arm housing (1). The anti-loosening gasket is an annular sheet structure, and the central through hole of the anti-loosening gasket is coaxially arranged with the bolt through hole of the rocker arm housing (1).

7. A planetary mechanism for a coal mining machine rocker arm according to claim 1, characterized in that, Both the boss and the inner tenon are set in two sets. The two sets of bosses are symmetrically distributed along the circumference of the inner gear ring (2), and the two sets of inner tenons are symmetrically distributed along the circumference of the rocker arm housing (1). The shape of the boss is compatible with the groove shape of the inner tenon and the boss is fitted into the inner tenon.

8. A vibration-resistant and impact-resistant installation method for a coal mining machine rocker arm planetary mechanism, based on the coal mining machine rocker arm planetary mechanism according to any one of claims 1-7, characterized in that, Includes the following steps: Step 1: Assemble the boss and the internal gear ring (2). Install the boss to the mounting through hole on the side wall of the internal gear ring (2) to complete the detachable connection between the boss and the internal gear ring (2). Ensure that the boss is arranged at equal intervals along the circumference of the internal gear ring (2) and that the mounting position of the boss matches the position of the recessed tenon groove on the end face of the rocker arm housing (1). Step 2: Connect the bearing bracket (3) to the internal gear ring (2) after the boss assembly is completed, and install the bearing bracket (3) to the end of the internal gear ring (2) away from the rocker arm housing (1) to complete the detachable fixing of the bearing bracket (3) and the internal gear ring (2); Step 3: Place the pressure plate (5) on the end face of the bearing bracket (3) away from the internal gear ring (2), so that the pressure plate (5) fits against the end face of the bearing bracket (3), and complete the positioning of the pressure plate (5); Step 4: Install the square connecting sleeve (4) onto the side of the pressure plate (5) away from the bearing frame (3) to complete the detachable connection between the square connecting sleeve (4) and the bearing frame (3), so that the pressure plate (5) is sandwiched between the square connecting sleeve (4) and the bearing frame (3) to form the pre-assembled coal mining machine rocker arm planetary mechanism. Step 5: Connect the pre-assembled planetary mechanism to the rocker arm housing (1), and align the boss on the internal gear ring (2) with the inner recessed tenon groove on the outer side of the end face of the rocker arm housing (1) so that the boss is fitted into the corresponding inner recessed tenon groove, thereby achieving circumferential positioning of the planetary mechanism and the rocker arm housing (1). Step 6: Tighten all detachable connections between the planetary mechanism and the rocker arm housing (1), and between each component of the planetary mechanism, to complete the overall anti-vibration and anti-impact installation of the rocker arm planetary mechanism of the coal mining machine.

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