CN216841637U - Connecting structure of swing arm of compact coal mining machine for thin coal seam - Google Patents

Abstract

The utility model relates to a connecting structure of a swing arm of a thin coal seam compact coal mining machine, which comprises a swing arm shell and a machine body shell, wherein the swing arm shell is provided with a front arm and a rear arm, the front arm and the rear arm are respectively provided with a front hinged connecting hole and a rear hinged connecting hole, the machine body shell is provided with a front hinged seat and a rear hinged seat, the front hinged seat and the rear hinged seat are both of a double-lug ear seat structure, the front arm and the rear arm are respectively hinged with the front hinged seat and the rear hinged seat, the ear holes of the two ear seats of the front hinged seat and the rear hinged seat are respectively fixed with a front wear-resistant sleeve and a rear wear-resistant sleeve, the front hinged connecting hole and the rear hinged connecting hole are respectively provided with a front sliding bearing and a rear sliding bearing, the front sliding bearing and the rear sliding bearing are respectively supported at the middle parts of a front hollow pin shaft and a rear hollow pin shaft, the front end and the rear end of the hollow pin shaft are respectively tightly matched with the two front wear-resistant sleeves and the two rear wear-resistant sleeves, the front hollow pin shaft are both fixed with the machine body shell by an anti-rotation structure, both the front sliding bearing and the rear sliding bearing adopt joint bearings. The utility model discloses connect the reliability high, bear greatly, longe-lived.

Description

Connecting structure of swing arm of compact coal mining machine for thin coal seam

Technical Field

The utility model relates to an articulated structure that coal-winning machine swing arm and coal-winning machine fuselage are connected has higher reliability, can be applied to the thin seam coal-winning machine of exploitation stereoplasm mineral aggregate.

Background

The hinge structure between the swing arm of the existing coal mining machine and the body of the coal mining machine is generally low in reliability, and mainly shows that the outer cylindrical surface of a pin shaft and the inner cylindrical surface of a shaft sleeve arranged in a shell hole of the swing arm are relatively worn after the swing arm is frequently rotated under heavy load, the wear is more aggravated in the environment of dust filling and water spraying corrosion under a mine, and after a gap is generated due to the wear, when the swing arm bears a large load, frequent impact is generated, so that the shell hole of the swing arm and the corresponding shell hole on the body of the coal mining machine are damaged. Damage to the casing hole may further cause the pin to jump and deflect or even snap in the enlarged casing hole after damage, and in addition, the pin is difficult to remove after rubbing with the surface of the casing hole.

At present, measures such as improving the hardness of the outer cylindrical surface of the pin shaft and the inner cylindrical surface of the shaft sleeve, filling lubricating grease and the like are mainly adopted in the industry to relieve the problems, but the grease filling is usually uneven, so the contact surface abrasion problem is still serious, and the lubricating grease is particularly obvious when a coal mining machine mines hard materials.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a connection structure of thin seam compact coal-winning machine swing arm connects the reliability height, longe-lived.

The utility model discloses a main technical scheme has:

the utility model provides a connection structure of compact coal-winning machine swing arm in thin coal seam, including swing arm casing and fuselage casing, be equipped with forearm and the postbrachium of left and right direction overhang on the swing arm casing, be equipped with preceding articulated connecting hole and back articulated connecting hole on forearm and the postbrachium respectively, be equipped with preceding articulated seat and the back articulated seat of left and right direction overhang on the fuselage casing, preceding articulated seat and back articulated seat are ears seat structure, form preceding recess and back groove respectively between the respective both ears seat of preceding articulated seat and back articulated seat, form well recess between the front ears seat of the back ear seat of preceding articulated seat and back articulated seat, forearm and postbrachium insert preceding recess and back recess respectively and articulate with preceding articulated seat and back articulated seat respectively, all install the sealing washer on the front and back terminal surface of forearm and postbrachium, forearm and postbrachium pass through corresponding sealing washer and preceding, back articulated seat end face seal, all fixed mounting has preceding wear-resisting sleeve in the earhole of two ears seats of preceding articulated seat, the front and rear ends of the front hollow pin shaft and the rear hollow pin shaft are respectively tightly matched with the two front wear-resistant sleeves and the two rear wear-resistant sleeves, the inner rings of the front sliding bearing and the rear sliding bearing are respectively circumferentially fixed with the front hollow pin shaft and the rear hollow pin shaft, the outer rings of the front sliding bearing and the rear sliding bearing are respectively circumferentially fixed with the front arm and the rear arm, a front positioning block is installed in a through hole of the front hollow pin shaft, one end of the front positioning block and one end of the front hollow pin shaft form an anti-rotation structure in concave-convex matching, the front positioning block is fixed relative to the machine body shell, a rear positioning sleeve is further fixed in the machine body shell, and one end of the rear positioning sleeve and one end of the rear hollow pin shaft form an anti-rotation structure in concave-convex matching.

The outer rings of the front sliding bearing and the rear sliding bearing are respectively in tight fit with the front hinge connecting hole and the rear hinge connecting hole, or are respectively in key connection with the front arm and the rear arm or are fastened through a fastening screw, and the inner rings of the front sliding bearing and the rear sliding bearing are respectively in key connection with the front hollow pin shaft and the rear hollow pin shaft.

The front sliding bearing and the rear sliding bearing preferably adopt joint bearings, the outer surface of the middle part of the inner ring of each joint bearing is convex outwards to form a drum shape, the outer ring of each joint bearing is sleeved at the middle part of the inner ring, a front sealing seat and a rear sealing seat are respectively arranged in the front and the rear of the outer ring, an anti-wear layer with uniform thickness is arranged between the inner ring and the outer ring, and a front sealing ring and a rear sealing ring are respectively arranged between the front sealing seat and the inner ring and between the rear sealing seat and the inner ring.

The main body of the swing arm shell is an arm support extending leftwards and rightwards, a rear-stage cutting transmission mechanism is installed in the arm support, the ends of an input end gear and an output end gear of the rear-stage cutting transmission mechanism are respectively 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, the root of the front arm is connected with the connecting arm, the root of the rear arm is connected with the middle of the arm support, the front arm and the rear arm are respectively positioned in front of and behind the high-speed end of the arm support, the front hinged connecting hole, the rear hinged connecting hole and the input end gear of the rear-stage cutting transmission mechanism are coaxial, sealing rings are installed on the front end face and the rear end face of the high-speed end of the arm support, the high-speed end of the arm support is positioned in a middle groove, a front-stage cutting transmission mechanism is installed in the body shell, and the output end gear of the front-stage cutting transmission mechanism is positioned in front of a front lug seat of the rear hinged seat, And in front of the rear wear-resistant sleeve, an output end gear of the front stage cutting transmission mechanism is coaxially connected with an input end gear of the rear stage cutting transmission mechanism in a transmission manner.

The input end gear core part of the rear-stage cutting transmission mechanism is provided with a rear-stage spline hole, a spline sleeve with an internal spline and an external spline is installed in the rear-stage spline hole, and the spline hole of the spline sleeve and the spline hole of the output end gear core part of the front-stage cutting transmission mechanism are simultaneously connected with one spline shaft spline.

The outer surface of the overhanging end of the front arm, the outer surface of the high-speed end of the arm support and the outer surface of the overhanging end of the rear arm are arranged into a first group of convex arc-shaped cylindrical surfaces which are coaxial with the front hinge connecting hole, the corresponding front groove, the middle groove and the rear groove are arranged into a first group of concave arc-shaped cylindrical surfaces which are coaxial with the front hinge connecting hole, and the first group of concave arc-shaped cylindrical surfaces and the first group of convex arc-shaped cylindrical surfaces are in one-to-one correspondence and are spaced from each other; the outer surfaces of the overhanging ends of the two ear seats of the front hinged seat are set to be a second group of convex arc cylindrical surfaces coaxial with the front hinged connecting hole, the side surface, close to the high-speed end of the arm support, of the connecting arm in the left-right direction is set to be a second group of concave arc cylindrical surfaces coaxial with the front hinged connecting hole, and the second group of concave arc cylindrical surfaces and the second group of convex arc cylindrical surfaces are in one-to-one correspondence and are spaced.

The fuselage casing can be for the components of a whole that can function independently structure, including front main part casing and back main part casing all-round butt joint and mutual fixed connection, two edges are equipped with first ear seat, second ear seat and preceding connection base respectively by preceding backward in proper order about the front main part casing, and first ear seat and second ear seat constitute respectively for preceding articulated seat preceding, back two ear seats, and preceding stage cutting drive mechanism's output gear is located in the preceding connection base, back main part casing include the back base member and lie in back base member middle part the place ahead to the back connection base of controlling the overhang, and wear-resisting cover is located respectively in the front portion of back connection base and back base member around two, preceding connection base docks with back connection base and fixes and constitutes the preceding ear seat of back articulated seat, forms between back base member and the back connection base the back recess.

The rear portion of back base member still is equipped with the mounting hole, back position sleeve fixed mounting in the mounting hole, the aperture of mounting hole is greater than the external diameter of back wear-resisting cover, is equipped with many places recess on the preceding terminal surface of back position sleeve, is equipped with many places archs on the rear end face of back cavity round pin axle, recess and protruding one-to-one, the mutual gomphosis of the preceding terminal surface of back position sleeve and the rear end face of back cavity round pin axle.

The rear end face of the front connecting base is attached to the front end face of the rear connecting base, the front connecting base and the rear connecting base are positioned through a left positioning pin and a right positioning pin, the positioning pins are hollow positioning pins, and the rear wear-resistant sleeves are located on the inner sides of central through holes of the positioning pins.

The side wall of the rear positioning sleeve is also provided with a notch, a crushing mechanism is installed in the rear base body and comprises a crushing torque shaft, a transmission gear set and a crushing roller shaft which are sequentially connected in a transmission manner, the transmission gear set extends left and right and penetrates through the notch, an input end gear of the transmission gear set is installed in the rear positioning sleeve, the crushing torque shaft penetrates through the rear hollow pin shaft and the rear positioning sleeve, the front end of the crushing torque shaft is connected with an output end gear of the front-stage cutting transmission mechanism through a coaxial spline, and the rear end of the crushing torque shaft is connected with an input end gear of the transmission gear set through a coaxial spline.

The utility model has the advantages that:

the swing arm shell is hinged with the machine body shell through the front hollow pin shaft, the rear hollow pin shaft and the sliding bearing, and the load is mainly borne by the sliding bearing, so that the burden of the hollow pin shaft and the related shell hole is reduced. Through setting up preceding locating piece and the back position sleeve fixed relative to the fuselage casing, and between preceding locating piece and preceding cavity round pin axle, set up between back position sleeve and the back cavity round pin axle and prevent changeing the structure, make the fuselage casing, preceding back wear-resisting cover, all keep static relatively under the normal operating mode of preceding back cavity round pin axle, consequently they do not take place wearing and tearing each other, also can not produce wearing and tearing clearance and casing hole grow, warp scheduling problem, even revolve under the atress impact condition, the surface of preceding back cavity round pin axle still can keep good, consequently, the articulated reliability has been improved, the life-span of articulated structure has been prolonged.

The front sliding bearing and the rear sliding bearing are preferably joint bearings, and have the advantages of high load capacity, impact resistance, corrosion resistance, wear resistance and automatic centering, so that the service life of the hinge structure is further prolonged.

An antifriction layer with uniform thickness is arranged between the inner ring and the outer ring of the joint bearing, so that the abrasion of a bearing sliding pair can be reduced, and the service life of the sliding bearing is further prolonged. The knuckle bearing has high radial bearing capacity and a low-friction rotary surface, and is provided with two-end dust-isolating structures, so that the cleanness of an internal friction pair is guaranteed, and the key grooves arranged on the inner ring and/or the outer ring guarantee the reliability of rotation.

The power transmission connecting points of the front-stage cutting transmission mechanism and the rear-stage cutting transmission mechanism are positioned between the front and rear hinged connecting points, and the span of the front and rear hinged connecting points is large, so that even if the front and rear hinged connecting points are abraded, the abrasion has small influence on the transmission precision of power transmission.

The mounting hole is not only a mounting hole of the rear positioning sleeve, but also a dismounting hole of the rear hollow pin shaft, and provides a supporting and mounting foundation for an input end gear of a gear transmission set of the crushing mechanism, so that the use purpose is achieved, and the mounting space in the machine body is saved.

The rear side wall of the rear positioning sleeve is provided with a notch, so that a sufficient meshing output space is provided for an input end gear of a transmission gear set of the crushing mechanism, the flat structure of the rear main body shell is convenient to arrange, and the overall structure of the rear main body shell is more compact.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of a portion of the structure of FIG. 1;

FIG. 3 is a schematic view of the swing arm;

FIG. 4 is a schematic view of the front body portion;

FIG. 5 is a schematic view of the hinge structure of the front hinge connection point;

FIG. 6 is a schematic view of the hinge structure of the rear hinge connection point;

fig. 7 is a schematic structural view of the joint bearing.

Reference numerals:

1. a swing arm; 11. a swing arm housing; 111. a forearm; 112. a rear arm; 113. a high-speed end of the arm support; 114. a connecting arm; 12. a rear stage cutting transmission mechanism; 121. an input end gear; 123. a spline shaft; 124. a spline housing; 13. a drum; 141. a front sliding bearing; 1411. an inner ring; 1412. an outer ring; 1413. an anti-attrition layer; 1414. a front seal seat; 1415. a front seal ring; 1416. a rear seal seat; 1417. a rear seal ring; 1418. a keyway; 142. a rear slide bearing;

2. a front body portion; 21. a front body section case; 211. a first ear mount; 212. a second ear mount; 213. a front connection base; 214. a front groove; 215. a middle groove; 22. a cutting motor; 25. an output end gear; 29. positioning pins;

3. a rear main body portion; 31. a rear main body housing; 311. a rear connection base; 3141. mounting holes; 321. a crushing torque shaft; 322. crushing a roller shaft; 323. a drive gear set; 32311. an input end gear;

4. a hinge structure; 411. a front hollow pin shaft; 412. a front positioning block; 413. a flat bond; 421. a rear hollow pin shaft; 4211. a protrusion; 422. a rear positioning sleeve; 4221. a groove; 4222. a notch; 423. a flat bond.

Detailed Description

The utility model discloses a connection structure of thin coal seam compact coal-winning machine swing arm (can be referred to as swing arm connection structure for short), as shown in fig. 1-7, swing arm casing 11 and fuselage casing including swing arm 1, be equipped with forearm 111 and the postbrachium 112 of left right direction overhang on the swing arm casing, be equipped with preceding articulated connecting hole and back articulated connecting hole on forearm and the postbrachium respectively. Be equipped with the articulated seat in the front and the articulated seat in back that the left and right directions overhang was stretched on the fuselage casing, the articulated seat in front and the articulated seat in back are ears ear seat structure, preceding recess 214 and back recess are formed respectively between the articulated seat in front and the articulated seat in back, recess 215 in forming between the ear seat in the back of the articulated seat in front and the articulated seat in back. The front arm and the rear arm are respectively inserted into the front groove and the rear groove and are respectively hinged with the front hinge seat and the rear hinge seat. And the front end face and the rear end face of the front arm and the rear arm are respectively provided with a sealing ring, and the front arm and the rear arm are sealed with the front hinge seat end face and the rear hinge seat end face through the corresponding sealing rings. Wear-resisting cover before all fixed mounting has in the earhole of two earrings of preceding articulated seat, wear-resisting cover after all fixed mounting has in the earhole of two earrings of articulated seat of back. The front hinge coupling hole and the rear hinge coupling hole are respectively installed therein with a front sliding bearing 141 and a rear sliding bearing 142. The front sliding bearing and the rear sliding bearing are respectively supported in the middle of the front hollow pin 411 and the rear hollow pin 421, and the front end and the rear end of the front hollow pin and the rear hollow pin are respectively tightly matched with the two front wear-resistant sleeves and the two rear wear-resistant sleeves. The inner rings of the front sliding bearing and the rear sliding bearing are circumferentially fixed with the front hollow pin shaft and the rear hollow pin shaft respectively, and the outer rings of the front sliding bearing and the rear sliding bearing are circumferentially fixed with the front arm and the rear arm respectively. The swing arm shell is hinged with the front and the back of the machine body shell through a front sliding bearing, a back sliding bearing, a front hollow pin shaft and a back hollow pin shaft to form a structure 4.

A front positioning block 412 is installed in the through hole of the front hollow pin shaft, and one end of the front positioning block and one end of the front hollow pin shaft form an anti-rotation structure matched in a concave-convex mode. In the embodiment shown in the attached drawings, the front end of the front positioning block and the front end of the front hollow pin shaft form an anti-rotation structure matched in a concave-convex mode in the radial direction. The front positioning block can be fixed relative to the machine body shell through a fastener, and the front hollow pin shaft is also fixed relative to the machine body shell. Because the front wear-resistant sleeve, the front hollow pin shaft and the machine body shell are relatively static, the front wear-resistant sleeve, the front hollow pin shaft and the machine body shell are not abraded mutually, and the problems of abrasion gaps, shell hole enlargement, deformation and the like are avoided. The rest parts of the front positioning block are not contacted with the front hollow pin shaft.

A rear positioning sleeve 422 is further fixed in the body shell, and one end of the rear positioning sleeve and one end of the rear hollow pin shaft form a concave-convex matched anti-rotation structure. In the embodiment shown in the attached drawings, the rear positioning sleeve is positioned behind the rear hollow pin shaft, and the front end of the rear positioning sleeve and the rear end of the rear hollow pin shaft form a concave-convex matched anti-rotation structure. In a similar way, the rear wear-resistant sleeve, the rear hollow pin shaft and the machine body shell are relatively static, so that the wear-resistant sleeve, the rear hollow pin shaft and the machine body shell are not worn, and the problems of wear clearance, shell hole enlargement, deformation and the like are avoided.

The outer rings of the front sliding bearing and the rear sliding bearing are respectively tightly matched with the front hinge connecting hole and the rear hinge connecting hole, or are respectively fastened or connected with the front arm and the rear arm through fastening screws. The inner rings of the front sliding bearing and the rear sliding bearing are respectively connected with the front hollow pin shaft and the rear hollow pin shaft in a key mode. As shown in the figure, the inner rings of the front sliding bearing and the rear sliding bearing are circumferentially fixed with the front hollow pin shaft and the rear hollow pin shaft through flat keys 413 and 423 respectively. The inner race is correspondingly keyed (e.g., as shown in fig. 7 for front sleeve bearing key 1418). Circumferential fixing measures on the inner ring and the outer ring can guarantee the working reliability of the bearing rotation and even the hinge structure.

The front sliding bearing and the rear sliding bearing are preferably joint bearings which have the advantages of high load capacity, impact resistance, corrosion resistance, wear resistance and self-aligning.

Taking a front sliding bearing as an example, the outer surface of the middle part of the inner ring 1411 of the joint bearing is convex and drum-shaped, and the outer ring 1412 of the joint bearing is sleeved on the middle part of the inner ring. The front and rear parts of the outer ring are respectively provided with a front sealing seat 1414 and a rear sealing seat 1416. A front sealing ring 1415 and a rear sealing ring 1417 are respectively arranged between the front sealing seat and the inner ring and between the rear sealing seat and the inner ring. Through set up the dust separation structure at both ends, can guarantee the vice cleanness of inside friction. An anti-wear layer 1413 with uniform thickness is arranged between the inner ring and the outer ring to reduce the wear of the bearing sliding pair. The joint bearing can prolong the service life of the sliding pair.

The main body of the swing arm shell is a cantilever crane extending left and right, and a rear-stage cutting transmission mechanism is installed in the cantilever crane. In order to distinguish the two ends of the boom conveniently, the ends of the input end gear and the output end gear of the rear-stage cutting transmission mechanism are respectively called the high-speed end 113 of the boom and the low-speed end of the boom. The front side of the low-speed end of the arm support is provided with a planetary speed reducing mechanism and a roller 13. The middle part of the arm support is provided with a connecting arm 114 which is suspended forwards from the arm support, and the root part of the front arm is connected with the connecting arm. The root of the rear arm is connected to the middle part of the arm support. The front arm and the rear arm are respectively positioned in front of and behind the high-speed end of the arm support. The front hinge connecting hole, the rear hinge connecting hole and the input end gear 121 of the rear stage cutting transmission mechanism 12 are coaxial. The high-speed end of the arm support is positioned in the middle groove.

A cutting motor 22 and a preceding cutting transmission mechanism are arranged in the machine body shell, and an output shaft of the cutting motor is coaxially connected with an input gear of the preceding cutting transmission mechanism in a transmission manner. The output end gear of the preceding stage cutting transmission mechanism is positioned in front of the front ear seat of the rear hinged seat and in front of the rear wear-resistant sleeve. The output end gear of the front stage cutting transmission mechanism is coaxially connected with the input end gear of the rear stage cutting transmission mechanism in a transmission manner. The power transmission points of the front-stage cutting transmission mechanism and the rear-stage cutting transmission mechanism are positioned between the front-rear hinged connection points of the swing arm shell and the machine body shell, and the influence of the abrasion of the front-rear hinged connection points on the transmission precision of power transmission is small.

The input end gear core part of the rear-stage cutting transmission mechanism is provided with a rear-stage spline hole, a spline sleeve 124 with an internal spline and an external spline is installed in the rear-stage spline hole, and the spline hole of the spline sleeve and the spline hole of the output end gear core part of the front-stage cutting transmission mechanism are in spline connection with a spline shaft 123. Spline connection is formed between the front-stage cutting transmission mechanism and the spline shaft, between the spline shaft and the spline housing and between the spline housing and the rear-stage cutting transmission mechanism. The spline connecting structure with the side clearance fit at multiple positions is adopted, the radial floating amount can be obviously increased, and the related parts forming the spline connecting structure can be automatically centered, so that even if the coaxiality of the front and rear hinged connecting points is reduced due to abrasion, the influence on the transmission of power between the front and rear cutting transmission mechanisms is small, and the power transmission reliability is improved.

The cantilever end outer surface of the front arm, the high-speed end outer surface of the arm support and the cantilever end outer surface of the rear arm are arranged into a first group of outward convex circular arc cylindrical surfaces which are coaxial with the front hinge connecting hole, the front groove, the middle groove and the rear groove are arranged into a first group of inward concave circular arc cylindrical surfaces which are coaxial with the front hinge connecting hole, and the first group of inward concave circular arc cylindrical surfaces are in one-to-one correspondence with the first group of outward convex circular arc cylindrical surfaces and are spaced from each other. The outer surfaces of the overhanging ends of the two ear seats of the front hinge seat are set to be a second group of convex arc cylindrical surfaces coaxial with the front hinge connecting hole, the side surface of the connecting arm close to the high-speed end of the arm support in the left-right direction is set to be a second group of concave arc cylindrical surfaces coaxial with the front hinge connecting hole, and the second group of concave arc cylindrical surfaces and the second group of convex arc cylindrical surfaces are in one-to-one correspondence and are spaced. Through with the size control of above-mentioned interval at suitable within range, can effectively control the coal petrography at swing arm casing luffing motion in-process and pile up and get into between swing arm casing and the fuselage casing, guarantee wobbling smooth and easy.

The body casing is preferably a separate structure, and includes a front body casing 21 of the front body 2 and a rear body casing 31 of the rear body 3, which are butted and fixedly connected with each other in front and rear. The left and right edges of the front body part shell are respectively provided with a first ear seat 211, a second ear seat 212 and a front connecting base 213 from front to back in sequence. The first ear seat and the second ear seat are respectively formed into a front ear seat and a rear ear seat of the front hinge seat. And an output end gear of the preceding stage cutting transmission mechanism is positioned in the front connecting base.

The rear main body part shell comprises a rear base body and a rear connecting base 311 which is positioned in the front of the middle part of the rear base body and extends leftwards and rightwards, and the front rear wear-resistant sleeves are respectively positioned in the rear connecting base and in the front of the rear base body. The front connecting base is in butt joint with the rear connecting base and is fixed to form a front ear seat of the rear hinge seat, and a rear groove is formed between the rear base body and the rear connecting base. The front and the back hinged connection points are respectively positioned on the front main body part shell and the back main body part shell.

The rear part of the rear base body is provided with a mounting hole 3141, the rear positioning sleeve is fixedly mounted in the mounting hole, and the aperture of the mounting hole is larger than the outer diameter of the rear wear-resistant sleeve. The front end face of the rear positioning sleeve is provided with a plurality of grooves 4221, the rear end face of the rear hollow pin shaft is provided with a plurality of protrusions 4211, the grooves correspond to the protrusions one to one, and the front end face of the rear positioning sleeve is embedded with the rear end face of the rear hollow pin shaft to form the anti-rotation structure matched with the protrusions and the protrusions. The mounting hole is not only a mounting hole of the rear positioning sleeve 422, but also a dismounting hole of the rear hollow pin 421.

The rear end face of the front connection base 213 is attached to the front end face of the rear connection base 311, and the front connection base and the rear connection base are positioned by the left and right positioning pins 29, so that the front and rear hinge connection points can be reliably kept coaxial. The positioning pin is a hollow positioning pin, and the rear wear-resistant sleeve is positioned on the inner side of a central through hole of the positioning pin.

A gap 4222 is arranged on the side wall of the rear part of the rear positioning sleeve. And a crushing mechanism is arranged in the rear base body. The crushing mechanism comprises a crushing torque shaft 321, a transmission gear group 323 and a crushing roller shaft 322 which are sequentially connected in a transmission manner. The transmission gear set extends left and right and passes through the notch, the input end gear 32311 of the transmission gear set is installed in the rear positioning sleeve 422, the rear positioning sleeve is a base for supporting and installing, and the notch provides a meshing output space for the input end gear 32311 of the transmission gear set. The crushing torque shaft passes through the rear hollow pin shaft and the rear locating sleeve, the front end of the crushing torque shaft is coaxially splined with the output end gear 25 of the pre-stage cutting transmission mechanism, and the rear end of the crushing torque shaft is coaxially splined with the input end gear 32311 of the transmission gear set. The arrangement of each part structure of the crushing mechanism is integrated, so that the arrangement of the flat structure of the rear main body part shell is convenient, and the overall structure of the rear main body part shell is more compact.

The front and back as used herein refers to the direction toward and away from the coal wall, respectively, unless specifically indicated otherwise.

Claims (10)

1. The utility model provides a connection structure of thin seam compact coal-winning machine swing arm which characterized in that: including swing arm casing and fuselage casing, be equipped with preceding arm and the postbrachium of left and right direction overhang on the swing arm casing, be equipped with preceding articulated connecting hole and back articulated connecting hole on preceding arm and the postbrachium respectively, be equipped with preceding articulated seat and back articulated seat of left and right direction overhang on the fuselage casing, preceding articulated seat and back articulated seat are ears and describe, form preceding recess and back recess between preceding articulated seat and the respective two ears of back articulated seat respectively, form well recess between the preceding ear seat of preceding articulated seat and the preceding ear seat of back articulated seat, preceding arm and postbrachium insert preceding recess and back recess respectively and articulate with preceding articulated seat and back articulated seat respectively, all install the sealing washer on the front and back terminal surface of preceding arm and postbrachium, preceding arm and postbrachium pass through corresponding sealing washer and preceding, back articulated seat end face seal, equal fixed mounting has the preceding cover in the ear hole of two ears of preceding articulated seat, equal fixed mounting has the wear-resisting cover in the ear hole of two ears of postbrachium, the front and rear hinged connecting holes are respectively provided with a front sliding bearing and a rear sliding bearing, the front sliding bearing and the rear sliding bearing are respectively supported in the middle of the front hollow pin shaft and the rear hollow pin shaft, the front and rear ends of the front hollow pin shaft and the rear hollow pin shaft are respectively in tight fit with the two front wear-resistant sleeves and the two rear wear-resistant sleeves, the inner rings of the front sliding bearing and the rear sliding bearing are respectively circumferentially fixed with the front hollow pin shaft and the rear hollow pin shaft, the outer rings of the front sliding bearing and the rear sliding bearing are respectively circumferentially fixed with the front arm and the rear arm, the through hole of the front hollow pin shaft is internally provided with a front positioning block, one end of the front positioning block and one end of the front hollow pin shaft form a concave-convex matched anti-rotation structure, the front positioning block is fixed relative to the machine body shell, the rear positioning sleeve is also fixed in the machine body shell, and one end of the rear positioning sleeve and one end of the rear hollow pin shaft form a concave-convex matched anti-rotation structure.

2. The connecting structure of the swing arm of the thin coal seam compact shearer as claimed in claim 1, wherein: the outer rings of the front sliding bearing and the rear sliding bearing are respectively in tight fit with the front hinge connecting hole and the rear hinge connecting hole, or are respectively in key connection with the front arm and the rear arm or are fastened through a fastening screw, and the inner rings of the front sliding bearing and the rear sliding bearing are respectively in key connection with the front hollow pin shaft and the rear hollow pin shaft.

3. The connecting structure of the swing arm of the thin coal seam compact shearer as claimed in claim 2, wherein: the front sliding bearing and the rear sliding bearing are joint bearings, the outer surface of the middle part of an inner ring of each joint bearing is convex outwards to form a drum shape, an outer ring of each joint bearing is sleeved in the middle part of the inner ring, a front sealing seat and a rear sealing seat are respectively arranged in the front and the rear of the outer ring, an anti-wear layer with uniform thickness is arranged between the inner ring and the outer ring, and a front sealing ring and a rear sealing ring are respectively arranged between the front sealing seat and the inner ring, and between the rear sealing seat and the inner ring.

4. The connecting structure of the swing arm of the thin coal seam compact shearer according to claim 1, 2 or 3, characterized in that: the main body of the swing arm shell is an arm support extending leftwards and rightwards, a rear-stage cutting transmission mechanism is installed in the arm support, the ends of an input end gear and an output end gear of the rear-stage cutting transmission mechanism are respectively 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, the root of the front arm is connected with the connecting arm, the root of the rear arm is connected with the middle of the arm support, the front arm and the rear arm are respectively positioned in front of and behind the high-speed end of the arm support, the front hinged connecting hole, the rear hinged connecting hole and the input end gear of the rear-stage cutting transmission mechanism are coaxial, sealing rings are installed on the front end face and the rear end face of the high-speed end of the arm support, the high-speed end of the arm support is positioned in a middle groove, a front-stage cutting transmission mechanism is installed in the body shell, and the output end gear of the front-stage cutting transmission mechanism is positioned in front of a front lug seat of the rear hinged seat, And in front of the rear wear-resistant sleeve, an output end gear of the front stage cutting transmission mechanism is coaxially connected with an input end gear of the rear stage cutting transmission mechanism in a transmission manner.

5. The connecting structure of the swing arm of the thin coal seam compact shearer as claimed in claim 4, wherein: the input end gear core part of the rear-stage cutting transmission mechanism is provided with a rear-stage spline hole, a spline sleeve with an internal spline and an external spline is installed in the rear-stage spline hole, and the spline hole of the spline sleeve and the spline hole of the output end gear core part of the front-stage cutting transmission mechanism are simultaneously connected with one spline shaft spline.

6. The connecting structure of the swing arm of the compact coal mining machine for the thin coal seam according to claim 5, characterized in that: the outer surface of the overhanging end of the front arm, the outer surface of the high-speed end of the arm support and the outer surface of the overhanging end of the rear arm are arranged into a first group of convex arc-shaped cylindrical surfaces which are coaxial with the front hinge connecting hole, the corresponding front groove, the middle groove and the rear groove are arranged into a first group of concave arc-shaped cylindrical surfaces which are coaxial with the front hinge connecting hole, and the first group of concave arc-shaped cylindrical surfaces and the first group of convex arc-shaped cylindrical surfaces are in one-to-one correspondence and are spaced from each other; the outer surfaces of the overhanging ends of the two ear seats of the front hinge seat are set to be a second group of convex arc cylindrical surfaces coaxial with the front hinge connecting hole, the side surface of the connecting arm close to the high-speed end of the arm support in the left-right direction is set to be a second group of concave arc cylindrical surfaces coaxial with the front hinge connecting hole, and the second group of concave arc cylindrical surfaces and the second group of convex arc cylindrical surfaces are in one-to-one correspondence and are spaced.

7. The connecting structure for the swing arm of the thin coal seam compact shearer according to claim 1, 2, 3, 4, 5 or 6, characterized in that: the fuselage casing is the components of a whole that can function independently structure, including front main part casing and back main part casing all-round butt joint and mutual fixed connection, two edges are equipped with first ear seat, second ear seat and preceding connection base respectively by preceding backward in proper order about the front main part casing, and first ear seat and second ear seat constitute respectively for preceding articulated seat preceding, back two ear seats, and preceding stage cutting drive mechanism's output gear is located in the preceding connection base, back main part casing include the back base member and lie in back base member middle part the place ahead to the back connection base of controlling the overhang, and wear-resisting cover is located respectively in the back connection base and the front portion of back base member around two, preceding connection base docks with back connection base and fixes the constitution the preceding ear seat of back articulated seat forms between back base member and the back connection base back recess.

8. The connecting structure of the swing arm of the thin coal seam compact shearer as claimed in claim 7, wherein: the rear portion of back base member is equipped with the mounting hole, back position sleeve fixed mounting in the mounting hole, the aperture of mounting hole is greater than the external diameter of back wear-resisting cover, is equipped with many places recess on the preceding terminal surface of back position sleeve, is equipped with many places archs on the rear end face of back cavity round pin axle, recess and protruding one-to-one, the mutual gomphosis of the preceding terminal surface of back position sleeve and the rear end face of back cavity round pin axle.

9. The connecting structure of the swing arm of the thin coal seam compact shearer as claimed in claim 8, wherein: the rear end face of the front connecting base is attached to the front end face of the rear connecting base, the front connecting base and the rear connecting base are positioned through a left positioning pin and a right positioning pin, the positioning pins are hollow positioning pins, and the rear wear-resistant sleeves are located on the inner sides of central through holes of the positioning pins.

10. The connecting structure of the swing arm of the thin coal seam compact shearer as claimed in claim 9, wherein: the crushing mechanism comprises a crushing torque shaft, a transmission gear set and a crushing roller shaft which are sequentially connected in a transmission manner, the transmission gear set extends left and right and penetrates through the gap, an input end gear of the transmission gear set is installed in the rear positioning sleeve, the crushing torque shaft penetrates through the rear hollow pin shaft and the rear positioning sleeve, the front end of the crushing torque shaft is connected with an output end gear of the front-stage cutting transmission mechanism through a coaxial spline, and the rear end of the crushing torque shaft is connected with an input end gear of the transmission gear set through a coaxial spline.

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