CN216841649U - Rocker arm and rocker arm supporting structure of thin coal seam mining machine - Google Patents

Abstract

The utility model relates to a thin seam coal mining machine rocking arm and rocking arm bearing structure, the main part of the swing arm casing of rocking arm is the cantilever crane that extends about and is used for installing the cutting drive mechanism, the cantilever crane middle part is connected with the linking arm that extends forward, is equipped with preceding, trailing arm on the linking arm, the high-speed end of preceding arm, trailing arm and cantilever crane is parallel to each other and by preceding interval arrangement after in proper order, be equipped with respectively on preceding, the trailing arm with the coaxial preceding, the back round pin axle mounting hole of input gear of cutting drive mechanism; the supporting structure comprises a main body shell and rocker arms, the left end and the right end of the front portion of the main body shell are respectively hinged to one rocker arm through a cutting motor serving as a pin shaft, an output shaft of the cutting motor is coaxially in transmission connection with input end gears of cutting transmission mechanisms on the same side of the left side and the right side, and an oil cylinder is connected between a front arm of each rocker arm and the main body shell. The utility model discloses can provide great exploitation scope and cutting power and nimble hydro-cylinder mounting means, can adapt to the different stress state of cylinder inside and outside spiral.

Description

Rocker arm and rocker arm supporting structure of thin coal seam mining machine

Technical Field

The utility model relates to a height-adjusting oil cylinder mounting structure of coal-winning machine rocking arm and this rocking arm is particularly useful for thin seam coal-winning machine, helps enlarging the exploitation scope of thin seam coal-winning machine, can be used to the exploitation of high rigidity material.

Background

The cutting motor of the existing thin seam mining machine is usually positioned on a rocker arm and swings along with the swinging of the rocker arm. When the rear rocker arm in the advancing direction of the thin seam suspension machine body coal mining machine adopts the cutter, the problem that the mining height of the rear roller is too small can occur, because when the mining height is increased again, the cutting motor of the rear rocker arm interferes with an upper coal platform left after the front roller cuts the bottom cutter, so that the overall mining height of the coal mining machine is too narrow, and the coal mining machine cannot meet the mining requirement of large change of the thickness of a mineral layer of a working face of a thin seam in China.

In order to solve the problems, the industry proposes that the cutting part is a swinging part and a fixing part, and the cutting motor and the main body of the cutting transmission system are arranged on the fixing part, so that the structure of the fixing part is too complex, the left and right length of the machine body suspension section is too long, the weight is too large, and the influence of the gravity center problem of the whole machine on the stress of the whole machine is still large.

Meanwhile, the machine body is thin, the space of the cavity is compact, the diameter of the oil cylinder is not suitable to be set to be large, the cutting counter force of the roller has high requirement on the hydraulic pressure of the oil cylinder, the rotating directions of the roller are different during cutting, the stress of the oil cylinder is different greatly, and the machine body is obvious in cutting of high-hardness materials. The existing oil cylinder installation mode is generally designed, one direction is determined, the factors such as material accumulation, structural space and the like are mainly considered, the consideration of left and right positive and negative installation is not considered, overload pressure protection can occur when hard materials are mined, and the problems of overall floating and the like can occur even when a drum installed in an outward rotating mode runs under the conditions of overlarge cutting force and high traction speed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a thin coal seam coal-winning machine rocking arm and rocking arm bearing structure can provide great exploitation scope, great cutting power and more nimble hydro-cylinder mounting means, can adapt to the different stress state of cylinder internal and external rotation, still helps shortening the fuselage.

The utility model discloses a main technical scheme has:

a rocker arm of a thin coal seam mining machine comprises a rocker arm shell, wherein the main body of the rocker arm shell is an arm support extending leftwards and rightwards, a cutting transmission mechanism is installed in the arm support and adopts a two-stage fixed-shaft gear transmission mechanism, the ends of an input end gear and an output end gear of the cutting transmission mechanism are respectively used as a high-speed end and a low-speed end of the arm support, a connecting arm which is cantilevered forwards from the arm support is arranged in the middle of the arm support, a front arm and a rear arm which are cantilevered leftwards or rightwards from the connecting arm are arranged on the connecting arm, the high-speed ends of the front arm, the rear arm and the arm support are parallel to each other and are sequentially arranged at intervals from front to back, a front pin shaft mounting hole and a rear pin shaft mounting hole which are used for realizing the hinge joint of the rocker arm of the thin coal seam mining machine and a machine body are respectively arranged on the front arm and the rear arm, a joint bearing is further installed in the front pin shaft mounting hole and the rear pin mounting hole, and the outer ring of the joint bearing is fixed relative to the front arm and the rear arm, the front pin shaft mounting hole and the rear pin shaft mounting hole are coaxial with an input end gear of the cutting transmission mechanism.

The connecting arm is a flat and thin structure with the left-right width smaller than the upper-lower height, the top surface of the connecting arm is an inclined surface, and the top surface of the connecting arm in the left-right direction is higher as the top surface of the connecting arm is closer to the high-speed end of the arm support.

A rocker arm supporting structure of a thin seam coal mining machine comprises a main body shell, a left oil cylinder, a right oil cylinder, a left cutting motor, a right cutting motor and a rocker arm of the thin seam coal mining machine, wherein a first lug seat, a second lug seat and a third lug seat are sequentially arranged at the left end and the right end of the front part of the main body shell from front to back respectively, a front groove is formed between the first lug seat and the second lug seat, a middle groove is formed between the second lug seat and the third lug seat, a rear groove is formed between the third lug seat and the rear part of the main body shell, the high-speed ends of a front arm, a rear arm and an arm support on the same swing arm shell are correspondingly inserted into the front groove, the middle groove and the rear groove which are positioned at the same side as the left side and the right side, each cutting motor is used as a hinge shaft and is arranged in an inner hole formed by combining the lug hole of the first lug seat, the front hinge shaft mounting hole, the lug hole of the second lug seat, the rear hinge shaft mounting hole and the lug hole of the third lug seat which are coaxial with the left side and the right side, static seals are arranged between the cutting motor and the first, second and third lug seats, an output shaft of the cutting motor is coaxially and drivingly connected with an input end gear of the cutting transmission mechanism positioned at the same side, and the oil cylinders are respectively hinged between the front arms of the left and right coal mining machine rocker arms and the left and right ends of the main body shell.

The outer surface of the overhanging end of the front arm is arranged to be an outer convex circular arc cylindrical surface coaxial with the mounting hole of the front pin shaft, the groove bottom of the corresponding front groove is arranged to be an open structure communicated with an inner cavity of the main body part shell, the top and bottom edges of the opening are arranged to be inner concave circular arc cylindrical surfaces coaxial with the ear hole of the second ear seat, and the outer surface of the overhanging end of the front arm is in coaxial sliding fit with the top and bottom edges.

The outer surfaces of the high-speed ends of the rear arm and the arm support on the same swing arm shell are both arranged to be convex arc cylindrical surfaces coaxial with the front pin shaft mounting hole, the groove bottoms of the corresponding middle groove and the rear groove are both arranged to be concave arc cylindrical surfaces coaxial with the lug hole of the second lug seat, and intervals are reserved between the outer surfaces of the high-speed ends of the rear arm and the arm support and the middle groove and between the outer surfaces of the high-speed ends of the rear arm and the arm support and the rear groove respectively.

The side surface of the connecting arm close to the low-speed end of the arm support is provided with an inwards concave arc cylindrical surface which is coaxial with the output end gear of the cutting transmission mechanism.

The outer surfaces of the overhanging ends of the first ear seat, the second ear seat and the third ear seat are arranged into convex arc cylindrical surfaces coaxial with the ear holes of the second ear seat, the side surface, close to the high-speed end of the arm support, of the connecting arm is arranged into a concave arc cylindrical surface, and a gap is reserved between the outer surfaces of the overhanging ends of the first ear seat, the second ear seat and the third ear seat and the side surface, close to the high-speed end of the arm support, of the corresponding connecting arm.

The apron is installed to the uncovered department of the front end of main part casing, forearm, main part casing, cutting motor and apron enclose into confined hydro-cylinder installation cavity, control two hydro-cylinders and all set up in the hydro-cylinder installation cavity, the one end of controlling two hydro-cylinders articulates respectively on the articulated seat of hydro-cylinder on the overhang end of controlling two forearms, and the other end of hydro-cylinder all articulates on the main part casing.

The articulated seat of the oil cylinder on the overhanging end of the front arm is divided into an upper part and a lower part, the left part and the right part of the oil cylinder are respectively provided with an articulated seat in the middle in the oil cylinder mounting cavity, the top plate and the bottom plate of the main body part shell, the articulated seat is provided with one articulated mounting position in the middle or two articulated mounting positions in left-right symmetry, when the articulated seat is provided with one articulated mounting position in the middle, one end of each of the left oil cylinder and the right oil cylinder is articulated on the articulated seat of the oil cylinder which is close to the lower part or the articulated seat of the oil cylinder which is close to the upper part, the other end of each of the left oil cylinder and the right oil cylinder is articulated on the articulated seat on the top plate or articulated seat on the bottom plate correspondingly, and the left oil cylinder and the right oil cylinder form an inverted V shape or a V shape; when the articulated seat is provided with two articulated mounting positions which are bilaterally symmetrical, one end of each of the left oil cylinder and the right oil cylinder is articulated on the articulated seat of the oil cylinder which is arranged on the lower side, the other end of each of the left oil cylinder and the right oil cylinder is articulated on the articulated seat which is arranged on the upper side, the other end of each of the left oil cylinder and the right oil cylinder is articulated on the articulated seat which is arranged on the top plate, the other end of each of the left oil cylinder and the right oil cylinder is articulated on the articulated seat which is arranged on the bottom plate, the left oil cylinder and the right oil cylinder are parallel, and the left oil cylinder and the right oil cylinder are different in side and the left side of the articulated mounting position to which the other ends of the two oil cylinders are connected.

The left oil cylinder and the right oil cylinder are single-rod piston cylinders, and the overhanging ends of the piston rods are hinged on the overhanging ends of the front arms.

The front part of the main body part shell is of a multi-chamber thin-wall frame structure, and the left large part and the right large part of the rear part of the main body part shell are of a solid structure.

The utility model has the advantages that:

the utility model discloses a rocking arm can regard as round pin axle and coal-winning machine fuselage to articulate mutually with the cutting motor, has both shortened the coal-winning machine and has hung the length about the fuselage section, has simplified cutting mechanism's structure again.

The connecting arm with a special structure basically has no influence on the coal platform above the coal platform in the process of swinging up and down along with the swinging arm shell, and finally the mining range of the whole rocker arm can be enlarged.

The utility model discloses a high-speed end of forearm, postbrachium and cantilever crane is by the preceding specific structure design who follows interval arrangement in proper order, and forearm and postbrachium are the atress position, and the high-speed end of cantilever crane is the non-atress position, and atress position and non-atress position separate can guarantee that the transmission part that is located the cantilever crane is in good non-atress state, consequently helps improving the transmission precision.

The joint bearings are arranged in the pin shaft mounting holes of the front arm and the rear arm, the cutting motor is supported by the joint bearings, the concentricity between the front pin shaft mounting hole and the casing of the cutting motor can be kept, and the transmission precision between the cutting motor and the cutting transmission mechanism is improved.

The side surface of the connecting arm close to the low-speed end of the arm support is set to be an inward-concave arc cylindrical surface coaxial with the output end gear of the cutting transmission mechanism, a certain gap is kept between the inward-concave arc cylindrical surface and the roller blade, and the loading effect of the roller for conveying materials spirally can be improved.

When the corresponding edge of the machine body of the coal mining machine is set to be an inner concave arc cylindrical surface coaxial with the front pin shaft mounting hole, the width of a gap between the outer convex arc cylindrical surface and the corresponding inner concave arc cylindrical surface is controlled within a proper range, and coal rock can be effectively controlled to be accumulated between the swing arm shell and the machine body in the process that the swing arm shell rotates relative to the machine body.

The side surface of the connecting arm close to the high-speed end of the arm support is provided with an inwards concave arc cylindrical surface coaxial with the front pin shaft mounting hole. The outer surface of the overhanging end of the corresponding lug seat on the body of the coal mining machine can be set into an outward convex circular arc cylindrical surface coaxial with the front pin shaft mounting hole, and the width of a gap between the inward concave circular arc cylindrical surface and the corresponding outward convex circular arc cylindrical surface is controlled within a proper range, so that coal rock can be effectively controlled to be stacked between the swing arm shell and the body in the process that the swing arm shell rotates relative to the body.

The overhanging end surface of forearm sets to the evagination circular arc cylinder coaxial with preceding round pin axle mounting hole, the tank bottom of corresponding preceding recess set to with the communicating open structure of an inner chamber of main part casing, open top bottom edge all set to with the coaxial indent circular arc cylinder of ear hole of second ear seat, the overhanging end surface of forearm with the coaxial sliding fit of top bottom edge can also keep between the two and with the cleanness of the communicating main part casing inner chamber of above-mentioned open structure when guaranteeing relative swing between rocking arm and the main part casing.

A closed oil cylinder installation cavity is defined by the front arm, the main body part shell, the cutting motor and the cover plate, a clean operation space is provided for the oil cylinder, the rocker arm is guaranteed not to be influenced by mineral aggregates such as coal and the like in the swinging process along with the stretching of the oil cylinder, the rocker arm can normally swing between the highest limit swing angle position and the lowest limit swing angle position, and finally the maximum mining range is guaranteed not to be influenced.

One end of the left oil cylinder and one end of the right oil cylinder are hinged to the oil cylinder hinged seats arranged at the overhanging ends of the left front arm and the right front arm respectively, and the other ends of the oil cylinders can be hinged to the hinged seats arranged on the top plate of the main body part shell and the hinged seats arranged on the bottom plate of the main body part shell respectively or hinged to the hinged seats arranged on the top plate and the bottom plate of the main body part shell respectively. When the oil cylinders are installed by adopting different installation modes, the two oil cylinders can form a V-shaped, inverted V-shaped or approximately parallel inclined state. According to the different rotation directions of the roller, the oil cylinder can flexibly change the different installation modes to adapt to different stress states of the internal rotation or the external rotation of the roller, and the problems that the roller floats on the whole due to overlarge cutting force and high traction speed are avoided.

Drawings

FIG. 1 is a front view of one embodiment of a rocker arm support structure of the present invention;

FIG. 2 is a top cross-sectional view of FIG. 1;

FIG. 3 is a front view of the swing arm housing of FIG. 1;

FIG. 4 is a top cross-sectional view of FIG. 3;

FIG. 5 is a schematic view of a first mounting structure of the oil cylinder;

FIG. 6 is a schematic view of a second mounting structure for the oil cylinder;

fig. 7 is a schematic view of a third mounting structure of the oil cylinder.

Reference numerals:

1. a rocker arm; 11. a swing arm housing; 111. a forearm; 1110. the oil cylinder is hinged with the base; 1110' oil cylinder hinged seat; 1111. the outer surface of the overhanging end of the forearm; 1112. a front pin shaft mounting hole; 112. a rear arm; 1121. the outer surface of the overhanging end of the rear arm; 1122. a rear pin shaft mounting hole; 113. a boom; 1131. the outer surface of the high-speed end of the arm support; 114. a connecting arm; 1141. the side surface is close to the high-speed end of the arm support; 1142. the side surface is close to the low-speed end of the arm support; 12. a cutting transmission mechanism; 121. an input end gear; 122. a planetary reduction mechanism; 13. a drum; 14. a knuckle bearing;

2. a main body housing; 210. a hinged seat; 210' a hinge mount; 22. an oil cylinder installation cavity; 23. a cover plate;

3. a cutting motor;

4. an oil cylinder; 41. a left side oil cylinder; 42. and a right oil cylinder.

Detailed Description

The utility model discloses a thin coal seam coal-winning machine rocking arm 1 (can be abbreviated as rocking arm), as shown in fig. 1-7, including swing arm casing 11, swing arm casing's main part is for controlling the cantilever crane 113 that extends, installs cutting drive mechanism 12 in the cantilever crane. The cutting transmission mechanism adopts a two-stage dead axle gear transmission mechanism. In order to distinguish two ends of the arm support conveniently, the ends of an input end gear 121 (also a high-speed end gear) and an output end gear (also a low-speed end gear) of the cutting transmission mechanism are respectively used as the high-speed end and the low-speed end of the arm support, a connecting arm 114 which is suspended from the arm support forwards is arranged in the middle of the arm support, a front arm 111 and a rear arm 112 which are suspended from the connecting arm leftwards or rightwards are arranged on the connecting arm, the high-speed ends of the front arm, the high-speed ends of the rear arm and the arm support are mutually parallel and are arranged at intervals from front to back, namely, for a right swing arm shell of a coal mining machine, the front arm and the rear arm are suspended from the connecting arm leftwards; for the left swing arm housing of the shearer, the front arm and the rear arm are cantilevered rightward from the connecting arm. The front arm and the rear arm are respectively provided with a front pin shaft mounting hole 1112 and a rear pin shaft mounting hole 1122 for the cutting motor to serve as a pin shaft to be mounted in, joint bearings 14 are further mounted in the front pin shaft mounting hole and the rear pin shaft mounting hole, and outer rings of the joint bearings are fixed relative to the front arm and the rear arm, for example, tight fit can be adopted, and key connection can also be adopted. The joint bearing is used for supporting the cutting motor, so that the front arm and the rear arm can rotate relative to the cutting motor. The front pin shaft mounting hole and the rear pin shaft mounting hole are coaxial with an input end gear of the cutting transmission mechanism, so that the cutting motor and the input end gear can transmit power coaxially after being mounted.

The swing arm is hinged with the body of the coal mining machine through the front arm, the rear arm and the cutting motor, so that the left-right length of the suspended body section of the coal mining machine is shortened, and the structure of the cutting mechanism is simplified. The bearing bears most of the load at the hinged part, so that the swing arm shell, the machine body shell and the cutting motor can be well protected from being influenced or less influenced, and the connection reliability is kept. The knuckle bearing has the advantages of high load capacity, impact resistance, corrosion resistance, wear resistance and automatic centering. The adoption of the joint bearing is helpful for keeping the concentricity between the front pin shaft mounting hole and the rear pin shaft mounting hole and the shell of the cutting motor respectively.

The connecting arm is a flat and thin structure with the left-right width smaller than the upper-lower height, the top surface of the connecting arm is an inclined surface, and the top surface of the connecting arm in the left-right direction is higher as the top surface of the connecting arm is closer to the high-speed end of the arm support. The connecting arm with the structure basically has no influence on the coal table above in the process of swinging up and down along with the swinging arm shell, and finally the mining range of the whole swinging arm can be enlarged.

The utility model discloses a rocker arm supporting structure of a thin coal seam mining machine, which comprises a main body part shell 2, a left oil cylinder 4, a right oil cylinder 4, a left cutting motor 3, a right cutting motor 3 and a rocker arm of the thin coal seam mining machine, wherein the left end and the right end of the front part of the main body part shell are respectively provided with a first lug seat, a second lug seat and a third lug seat from front to back in sequence, a front groove is formed between the first lug seat and the second lug seat, a middle groove is formed between the second lug seat and the third lug seat, a rear groove is formed between the third lug seat and the rear part of the main body part shell, the high speed ends of a front arm, a rear arm and an arm support on the same swing arm shell are correspondingly inserted into the front groove, the middle groove and the rear groove which are positioned on the same side of the left and the right, each cutting motor is arranged as a hinge shaft in an inner hole formed by combining the lug hole of the first lug seat, the front hinge shaft mounting hole, the lug hole of the second lug seat, the rear hinge shaft mounting hole and the lug mounting hole of the third lug seat which are coaxial with the left and the right side, static seals are arranged between the cutting motor and the first, second and third lug seats, the output shaft of the cutting motor is coaxially connected with the input gear 121 of the cutting transmission mechanism positioned at the same side in a transmission manner, and the oil cylinders are respectively hinged between the front arms of the left and right coal mining machine rocker arms and the left and right ends of the main body shell.

The shearer drum 13 and the planetary reduction mechanism 122 are both mounted at the low speed end of the boom, with the planetary reduction mechanism located in the core of the drum. The planetary reduction mechanism bears most of the reduction work, so that the cutting transmission mechanism serving as the preceding reduction part can meet the reduction requirement by adopting a relatively simple fixed-shaft gear transmission mechanism, and accordingly the appearance of the arm support for accommodating the cutting transmission mechanism is more regular.

The external load force applied to the roller is transmitted to the main body casing through the connecting arm, the front arm and the rear arm. The front arm and the rear arm are stressed parts, the high-speed end of the arm support is an unstressed part, and the stressed parts are separated from the unstressed parts, so that a transmission part in the arm support can be ensured to be in a good unstressed state, and the transmission precision is improved.

The outer surface 1111 of the overhanging end of the front arm is preferably set to be an outer convex circular arc cylindrical surface coaxial with the mounting hole of the front pin shaft, the groove bottom of the corresponding front groove is set to be an open structure communicated with an inner cavity of the main body part shell, the top and bottom edges of the open structure are all set to be inner concave circular arc cylindrical surfaces coaxial with the ear hole of the second ear seat, and the outer surface 1111 of the overhanging end of the front arm is in coaxial sliding fit with the top and bottom edges. The structural design of the front arm and the front groove ensures that the rocker arm and the main body part shell swing relatively and simultaneously can keep the cleanness of the rocker arm and the main body part shell and an inner cavity of the main body part shell communicated with the opening structure.

The rear arm on the shell of the same swing arm and the outer surface 1131 of the high-speed end of the arm support are both arranged into convex arc cylindrical surfaces coaxial with the mounting hole of the front pin shaft, the groove bottoms of the corresponding middle groove and the rear groove are both arranged into concave arc cylindrical surfaces coaxial with the ear hole of the second ear seat, and a gap is reserved between the outer surface 1121 of the overhanging end of the rear arm and the outer surface 1131 of the high-speed end of the arm support and the middle groove and the rear groove respectively. By controlling the width of the gap between the convex arc cylindrical surface and the corresponding concave arc cylindrical surface within a proper range, the coal rock can be effectively controlled to be accumulated between the swing arm and the machine body in the process that the swing arm rotates relative to the machine body.

The side surface 1142 of the connecting arm close to the low-speed end of the arm support is arranged to be an inward concave arc cylindrical surface, and the inward concave arc cylindrical surface is coaxial with the output end gear of the cutting transmission mechanism. The concave arc cylindrical surface can keep a certain gap with the roller blade, and the loading effect of the roller for spirally conveying materials is improved.

The outer surfaces of the overhanging ends of the first ear seat, the second ear seat and the third ear seat are arranged into convex arc cylindrical surfaces coaxial with the ear holes of the second ear seat, the side surface 1141, close to the high-speed end of the arm support, on the connecting arm is arranged into a concave arc cylindrical surface, and intervals are reserved between the outer surfaces of the overhanging ends of the first ear seat, the second ear seat and the third ear seat and the side surface, close to the high-speed end of the arm support, on the corresponding connecting arm. By controlling the width of the gap between the concave arc-shaped cylindrical surface and the corresponding convex arc-shaped cylindrical surface within a proper range, the coal rock can be effectively controlled to be accumulated between the rocker arm and the main body part shell in the process that the rocker arm rotates relative to the main body part shell.

The utility model discloses a mining machine, including main part casing, apron 23, forearm, main part casing, cutting motor and apron, the apron is installed to the front end uncovered department of main part casing, forearm, main part casing, cutting motor and apron enclose into confined hydro-cylinder installation cavity 22, and this hydro-cylinder installation cavity provides clear operation space for the hydro-cylinder, guarantees that the rocking arm is not influenced by mineral aggregate such as coal at the flexible in-process that swings along with the hydro-cylinder, also provides the assurance for the rocking arm can normally swing between highest and minimum limit pivot angle position, finally ensures that the biggest exploitation scope is not influenced. The left oil cylinder and the right oil cylinder are arranged in the oil cylinder mounting cavity.

The oil cylinder hinged seat on the overhanging end of the front arm is provided with an upper oil cylinder hinged seat and a lower oil cylinder hinged seat which are respectively 1110' and 1110. The oil cylinder mounting cavity, the top plate and the bottom plate of the main body part shell are respectively provided with a hinge seat 210' and a hinge seat 210 at the left and right centers, and the hinge seat is provided with a hinge mounting position at one middle or two symmetrical positions.

As shown in fig. 6 and 7, when the hinge seat is provided with a middle hinge mounting position, one end of each of the left and right cylinders 41 and 42 is hinged to the lower cylinder hinge seat or the upper cylinder hinge seat, and correspondingly, the other end of each of the left and right cylinders is hinged to the hinge seat on the top plate or the hinge seat on the bottom plate, and the left and right cylinders form an inverted V shape (see fig. 6) or a V shape (see fig. 7).

As shown in fig. 5, when two hinge mounting positions are symmetrically arranged on the hinge base, one of the ends of the left and right cylinders 41 and 42 is hinged to the lower cylinder hinge base, the other is hinged to the upper cylinder hinge base, and correspondingly, the other ends of the left and right cylinders are hinged to the hinge base on the top plate, the other is hinged to the hinge base on the bottom plate, and the left and right cylinders are inclined in an approximately parallel state, and the hinge mounting positions to which the other ends of the two cylinders are connected are different from the left and right sides.

According to the different of the rotary direction of the roller, the oil cylinder can flexibly change the installation mode so as to adapt to different stress states of the internal rotation or the external rotation of the roller.

When the two oil cylinders are installed in an approximately parallel inclined state, the left and right lengths of the front part of the main body part shell can be further shortened.

The left oil cylinder and the right oil cylinder are single-rod piston cylinders, and the overhanging ends of the piston rods are hinged on the overhanging ends of the front arms. When the oil cylinder drives the left rocker arm and the right rocker arm to swing, the large cavity of the oil cylinder is in the middle, the small cavity is on the left side and the right side, the cutting reaction force is mainly born by the large cavity of the oil cylinder, no matter the roller is in an inward rotation state or an outward rotation state, the stress is better, and the one-way mining is particularly obvious.

The front part of the main body part shell is of a multi-chamber thin-wall frame structure, the left large part and the right large part at the rear part of the main body part shell are of solid structures, and the left length and the right length of the front part of the main body part shell, namely the left hanging body section, are shorter, so that the gravity center of the whole coal mining machine can move backwards, and the stability of the whole coal mining machine is improved.

As used herein, unless specifically indicated, fore and aft refer to directions toward and away from the coal wall, respectively.

Claims (11)

1. The utility model provides a thin coal seam coal-winning machine rocking arm which characterized in that: the coal mining machine comprises a swing arm shell, wherein the main body of the swing arm shell is an arm support extending leftwards and rightwards, a cutting transmission mechanism is installed in the arm support, the cutting transmission mechanism adopts a two-stage fixed shaft gear transmission mechanism, the ends of an input end gear and an output end gear of the cutting transmission mechanism are respectively used as a high-speed end and a low-speed end of the arm support, a connecting arm overhanging forwards from the arm support is arranged in the middle of the arm support, a front arm and a rear arm overhanging leftwards or rightwards from the connecting arm are arranged on the connecting arm, the high-speed ends of the front arm, the rear arm and the arm support are mutually parallel and are sequentially arranged at intervals from front to back, a front pin shaft mounting hole and a rear pin shaft mounting hole which are used for realizing the hinging of a rocker arm of the coal mining machine and the machine body of a thin coal seam are respectively arranged on the front arm and the rear arm, and joint bearings are further arranged in the front pin shaft mounting hole and the rear pin shaft mounting hole, the outer rings of the joint bearings are fixed relative to the front arm and the rear arm, and the front pin shaft mounting hole and the rear pin shaft mounting hole are coaxial with an input end gear of the cutting transmission mechanism.

2. The thin seam shearer rocker arm of claim 1, wherein: the connecting arm is a flat and thin structure with the left-right width smaller than the upper-lower height, the top surface of the connecting arm is an inclined surface, and the top surface of the connecting arm in the left-right direction is higher as the top surface of the connecting arm is closer to the high-speed end of the arm support.

3. The utility model provides a thin coal seam coal-winning machine rocking arm bearing structure which characterized in that: the thin seam shearer rocker arm comprises a main body shell, a left oil cylinder, a right oil cylinder, a left cutting motor, a right cutting motor and the rocker arm of the thin seam shearer as claimed in claim 1 or 2, wherein a first lug seat, a second lug seat and a third lug seat are sequentially arranged at the left end and the right end of the front part of the main body shell from front to back, a front groove is formed between the first lug seat and the second lug seat, a middle groove is formed between the second lug seat and the third lug seat, a rear groove is formed between the third lug seat and the rear part of the main body shell, the high-speed ends of a front arm, a rear arm and an arm support on the same swing arm shell are correspondingly inserted into the front groove, the middle groove and the rear groove which are positioned at the left side and the right side, each cutting motor is used as a hinge shaft and is arranged in an inner hole formed by combining the lug hole of the first lug seat, the front hinge shaft installation hole, the lug hole of the second lug seat, the rear hinge shaft installation hole and the lug hole of the third lug seat which are coaxial at the left side and the right side, and the first side, the cutting motor and the first lug seat, And a static seal is arranged between the second lug seat and the third lug seat, an output shaft of the cutting motor is coaxially connected with an input end gear of the cutting transmission mechanism positioned at the same side in a transmission manner, and the oil cylinders are respectively hinged between the front arms of the left coal mining machine rocker arm and the right coal mining machine rocker arm and between the left end and the right end of the main body shell.

4. The thin seam shearer rocker arm support structure of claim 3, wherein: the outer surface of the overhanging end of the front arm is arranged to be an outer convex circular arc cylindrical surface coaxial with the mounting hole of the front pin shaft, the groove bottom of the corresponding front groove is arranged to be an open structure communicated with an inner cavity of the main body part shell, the top and bottom edges of the opening are arranged to be inner concave circular arc cylindrical surfaces coaxial with the ear hole of the second ear seat, and the outer surface of the overhanging end of the front arm is in coaxial sliding fit with the top and bottom edges.

5. The thin seam shearer rocker arm support structure of claim 4, wherein: the outer surfaces of the high-speed ends of the rear arm and the arm support on the same swing arm shell are both arranged to be convex arc cylindrical surfaces coaxial with the front pin shaft mounting hole, the groove bottoms of the corresponding middle groove and the rear groove are both arranged to be concave arc cylindrical surfaces coaxial with the lug hole of the second lug seat, and intervals are reserved between the outer surfaces of the high-speed ends of the rear arm and the arm support and the middle groove and between the outer surfaces of the high-speed ends of the rear arm and the arm support and the rear groove respectively.

6. The thin seam shearer rocker arm support structure of claim 5, wherein: the side surface of the connecting arm close to the low-speed end of the arm support is provided with an inwards concave arc cylindrical surface which is coaxial with the output end gear of the cutting transmission mechanism.

7. The thin seam shearer rocker arm support structure of claim 6, wherein: the outer surfaces of the overhanging ends of the first ear seat, the second ear seat and the third ear seat are arranged into convex arc cylindrical surfaces coaxial with the ear holes of the second ear seat, the side surface, close to the high-speed end of the arm support, of the connecting arm is arranged into a concave arc cylindrical surface, and a gap is reserved between the outer surfaces of the overhanging ends of the first ear seat, the second ear seat and the third ear seat and the side surface, close to the high-speed end of the arm support, of the corresponding connecting arm.

8. The thin seam shearer rocker arm support structure of claim 3, 4, 5, 6 or 7, wherein: the apron is installed to the uncovered department of the front end of main part casing, forearm, main part casing, cutting motor and apron enclose into confined hydro-cylinder installation cavity, control two hydro-cylinders and all set up in the hydro-cylinder installation cavity, the one end of controlling two hydro-cylinders articulates respectively on the articulated seat of hydro-cylinder on the overhang end of controlling two forearms, and the other end of hydro-cylinder all articulates on the main part casing.

9. The thin seam shearer rocker arm support structure of claim 8, wherein: the articulated seat of the oil cylinder on the overhanging end of the front arm is divided into an upper part and a lower part, the left part and the right part of the oil cylinder are respectively provided with an articulated seat in the middle in the oil cylinder mounting cavity, the top plate and the bottom plate of the main body part shell, the articulated seat is provided with one articulated mounting position in the middle or two articulated mounting positions in left-right symmetry, when the articulated seat is provided with one articulated mounting position in the middle, one end of each of the left oil cylinder and the right oil cylinder is articulated on the articulated seat of the oil cylinder which is close to the lower part or the articulated seat of the oil cylinder which is close to the upper part, the other end of each of the left oil cylinder and the right oil cylinder is articulated on the articulated seat on the top plate or articulated seat on the bottom plate correspondingly, and the left oil cylinder and the right oil cylinder form an inverted V shape or a V shape; when the articulated seat is provided with two articulated mounting positions which are bilaterally symmetrical, one end of each of the left oil cylinder and the right oil cylinder is articulated on the articulated seat of the oil cylinder which is arranged on the lower side, the other end of each of the left oil cylinder and the right oil cylinder is articulated on the articulated seat which is arranged on the upper side, the other end of each of the left oil cylinder and the right oil cylinder is articulated on the articulated seat which is arranged on the top plate, the other end of each of the left oil cylinder and the right oil cylinder is articulated on the articulated seat which is arranged on the bottom plate, the left oil cylinder and the right oil cylinder are parallel, and the left oil cylinder and the right oil cylinder are different in side and the left side of the articulated mounting position to which the other ends of the two oil cylinders are connected.

10. The thin seam shearer rocker arm support structure of claim 9, wherein: the left oil cylinder and the right oil cylinder are single-rod piston cylinders, and the overhanging ends of the piston rods are hinged on the overhanging ends of the front arms.

11. The thin seam shearer rocker arm support structure of claim 8, wherein: the front part of the main body part shell is of a multi-chamber thin-wall frame structure, and the left large part and the right large part of the rear part of the main body part shell are of a solid structure.

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