Connecting structure of swing arm of compact coal cutter for thin coal seam

Abstract

The present application relates to a kind of thin coal seam compact type coal winning machine swing arm connection structure, including swing arm shell and machine body shell, swing arm shell is equipped with forearm and rear arm, forearm and rear arm are respectively equipped with front hinged connection hole and rear hinged connection hole, machine body shell is equipped with front hinged seat and rear hinged seat, front, rear hinged seat is double-ear seat structure, forearm and rear arm are respectively hinged with front hinged seat and rear hinged seat, the ear hole of the two ear seats of front, rear hinged seat is respectively fixed with front wear sleeve and rear wear sleeve, front, rear hinged connection hole is respectively installed front, rear sliding bearing, front, rear sliding bearing is respectively supported in the middle of front, rear hollow pin shaft, the front and rear ends of front, rear hollow pin shaft are respectively tightly matched with two front wear sleeves and two rear wear sleeves, front, rear hollow pin shaft is fixed with machine body shell using anti-rotation structure, front, rear sliding bearing is all joint bearing.This application has high connection reliability, large load and long service life.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of coal winning machine swing arm and the hinge structure of coal winning machine body connection, with higher reliability, can be applied to the thin coal seam coal winning machine of hard material mining. BACKGROUND

[0002] The hinge structure between the existing coal winning machine swing arm and coal winning machine body is generally not high in reliability, mainly performance is that the inner cylindrical surface of the shaft sleeve installed in the hole of swing arm shell and the outer cylindrical surface of pin shaft are worn after swing arm is often rotated under heavy load, wear is more serious in the environment of mine full of dust, water corrosion, and after gap is generated due to wear, when swing arm bears larger load, frequent impact appears, which causes the damage of corresponding shell hole on swing arm shell and coal winning machine body.The damage of shell hole can further lead to the problems such as the jump deflection of pin shaft in the shell hole after damage and even the breakage, and the pin shaft and shell hole surface are difficult to remove after friction.

[0003] At present, the industry mainly takes measures such as improving the hardness of outer cylindrical surface of pin shaft and inner cylindrical surface of shaft sleeve and adding lubricating grease to alleviate the above problems, but the grease is often uneven, so the wear problem of contact surface is still serious, especially when the coal winning machine mines hard material. SUMMARY

[0004] The present application aims to provide a kind of connecting structure of thin coal seam compact coal winning machine swing arm, with high connection reliability and long service life.

[0005] The main technical scheme of the present application is as follows:

[0006] The application discloses a connecting structure of a swing arm of a thin seam compact coal mining machine, which comprises a swing arm shell and a machine body shell, the swing arm shell is provided with a front arm and a rear arm which are suspended in the left-right direction, 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 which are suspended in the left-right direction, the front hinged seat and the rear hinged seat are both double-ear seat structures, a front groove and a rear groove are respectively formed between the two ear seats of the front hinged seat and the rear hinged seat, a middle groove is formed between the rear ear seat of the front hinged seat and the front ear seat of the rear hinged seat, the front arm and the rear arm are respectively inserted into the front groove and the rear groove and are hinged with the front hinged seat and the rear hinged seat, a front wear sleeve is fixedly installed in the ear hole of the two ear seats of the front hinged seat, a rear wear sleeve is fixedly installed in the ear hole of the two ear seats of the rear hinged seat, a front sliding bearing and a rear sliding bearing are respectively installed in the front hinged connecting hole and the rear hinged connecting hole, the front sliding bearing and the rear sliding bearing are respectively supported in the middle part of a front hollow pin shaft and a rear hollow pin shaft, the front end and the rear end of the front hollow pin shaft and the rear hollow pin shaft are tightly matched with the two front wear sleeves and the two rear wear sleeves, the inner ring of the front sliding bearing and the rear sliding bearing is fixed in the circumferential direction of the front hollow pin shaft and the rear hollow pin shaft, the outer ring of the front sliding bearing and the rear sliding bearing is fixed in the circumferential direction of the front arm and the rear arm, a front positioning block is installed in the 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 a concave-convex matched anti-rotation structure and the front positioning block is fixed relative to the machine body shell, and a rear positioning sleeve is further fixed in the machine body shell, one end of the rear positioning sleeve and one end of the rear hollow pin shaft form a concave-convex matched anti-rotation structure.

[0007] The outer ring of the front sliding bearing and the rear sliding bearing is tightly matched with the front hinged connecting hole and the rear hinged connecting hole, or is keyed connected with the front arm and the rear arm or is fastened through a fastening screw, and the inner ring of the front sliding bearing and the rear sliding bearing is keyed connected with the front hollow pin shaft and the rear hollow pin shaft.

[0008] The front sliding bearing and the rear sliding bearing preferably adopt a joint bearing, the middle part of the outer surface of the inner ring of the joint bearing is outwardly convex and drum-shaped, the outer ring of the joint bearing is sleeved on the middle part of the inner ring, the front end and the rear end of the outer ring are respectively provided with a front sealing seat and a rear sealing seat, a uniform-thickness anti-friction layer 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 rear sealing seat and the inner ring.

[0009] The main body of the swing arm shell is a left and right extending arm support, a rear stage cutting transmission mechanism is installed in the arm support, the input end gear and the output end gear of the rear stage cutting transmission mechanism are respectively the high speed end and the low speed end of the arm support, a connecting arm is provided in the middle of the arm support and suspends forward from the arm support, the root of the front arm is connected with the connecting arm, the root of the rear arm is connected in the middle of the arm support, the front arm and the rear arm are respectively located 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 of the rear stage cutting transmission mechanism are coaxial, the high speed end of the arm support is located in the middle groove, a front stage cutting transmission mechanism is installed in the fuselage shell, the output end gear of the front stage cutting transmission mechanism is located in the front of the front lug of the rear hinge seat and the front of the rear wear sleeve, the output end gear of the front stage cutting transmission mechanism is coaxially and drivingly connected with the input end gear of the rear stage cutting transmission mechanism.

[0010] The input end gear core of the rear stage cutting transmission mechanism is provided with a rear stage spline hole, a spline sleeve with an inner spline and an outer spline is installed in the rear stage spline hole, the spline hole of the spline sleeve and the spline hole of the output end gear core of the front stage cutting transmission mechanism are simultaneously spline coupled with a spline shaft.

[0011] The overhanging end outer surface of the front arm, the high speed end outer surface of the arm support and the overhanging end outer surface of the rear arm are provided as a first group of convex circular arc cylindrical surfaces coaxial with the front hinge connecting hole, the corresponding front groove, middle groove and rear groove are provided as a first group of concave circular arc cylindrical surfaces coaxial with the front hinge connecting hole, the first group of concave circular arc cylindrical surfaces and the first group of convex circular arc cylindrical surfaces correspond one by one and leave a space between each other; the overhanging end outer surface of the two lug seats of the front hinge seat is provided as a second group of convex circular 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 and right direction is provided as a second group of concave circular arc cylindrical surfaces coaxial with the front hinge connecting hole, the second group of concave circular arc cylindrical surfaces and the second group of convex circular arc cylindrical surfaces correspond one by one and leave a space between each other.

[0012] The fuselage shell can be a split structure, including a front main body part shell and a rear main body part shell which are butted and fixedly connected with each other, the left and right edges of the front main body part shell are each provided with a first lug seat, a second lug seat and a front connecting base in sequence from front to back, the first lug seat and the second lug seat are respectively constructed as the front and rear lug seats of the front hinge seat, the output end gear of the front stage cutting transmission mechanism is located in the front connecting base, the rear main body part shell includes a rear base and a rear connecting base which suspends left and right from the middle of the rear base, the two rear wear sleeves are respectively located in the rear connecting base and the front of the rear base, the front connecting base and the rear connecting base are butted and fixed to form the front lug seat of the rear hinge seat, the rear groove is formed between the rear base and the rear connecting base.

[0013] The rear part of the rear base is also provided with a mounting hole, the rear positioning sleeve is fixedly installed in the mounting hole, the hole diameter of the mounting hole is larger than the outer diameter of the rear hollow pin shaft, a plurality of grooves are arranged on the front end face of the rear positioning sleeve, a plurality of protrusions are arranged on the rear end face of the rear hollow pin shaft, the grooves and the protrusions correspond to each other, and the front end face of the rear positioning sleeve and the rear end face of the rear hollow pin shaft are embedded with each other.

[0014] 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 the left and right two positioning pins, the positioning pin is a hollow positioning pin, and the rear wear-resistant sleeve is located on the inside of the central through hole of the positioning pin.

[0015] A gap is further arranged on the side wall of the rear positioning sleeve, a crushing mechanism is installed in the rear base, the crushing mechanism comprises a crushing torque shaft, a transmission gear set and a crushing roller shaft which are sequentially transmission-connected, the transmission gear set is arranged to extend left and right and passes through the gap, an input end gear of the transmission gear set is installed in the rear positioning sleeve, the crushing torque shaft passes through the rear hollow pin shaft and the rear positioning sleeve, a front end of the crushing torque shaft is coaxially splined connected with an output end gear of the front-stage cutting transmission mechanism, and a rear end of the crushing torque shaft is coaxially splined connected with the input end gear of the transmission gear set.

[0016] The beneficial effects of the present application are:

[0017] The swing arm shell and the fuselage shell are hinged through the front and rear hollow pin shafts and sliding bearings, the load is mainly borne by the sliding bearings, and the burden of the hollow pin shafts and the related shell holes is reduced. The front positioning block and the rear positioning sleeve which are fixed relative to the fuselage shell are arranged, and the anti-rotation structure is arranged between the front positioning block and the front hollow pin shaft and between the rear positioning sleeve and the rear hollow pin shaft, so that the fuselage shell, the front and rear wear-resistant sleeves and the front and rear hollow pin shafts are kept relatively static under normal working conditions, and therefore they do not wear each other and do not produce wear gap, shell hole enlargement and deformation and other problems, and even under the force impact condition, the outer surface of the front and rear hollow pin shafts can still be kept good, so that the reliability of the hinge is improved and the service life of the hinge structure is prolonged.

[0018] The front and rear sliding bearings preferably adopt joint bearings, which have large load capacity, impact resistance, corrosion resistance, wear resistance and automatic alignment, and therefore the service life of the hinge structure is further prolonged.

[0019] The uniform-thickness wear-reducing layer arranged between the inner and outer rings of the joint bearing can reduce the wear of the sliding pair of the bearing, and further prolong the service life of the sliding bearing. The joint bearing has high radial bearing capacity and low friction rotary surface, and has dust isolation structure at both ends, so as to ensure the cleanliness of the internal friction pair, and the key groove arranged on the inner ring and / or the outer ring ensures the reliability of rotation.

[0020] The power transmission connection points of the front-stage cutting transmission mechanism and the rear-stage cutting transmission mechanism are located between the front and rear hinged connection points, and the distance between the front and rear hinged connection points is large, so even if the front and rear hinged connection points are worn, the wear has little effect on the transmission accuracy of power transmission.

[0021] The mounting hole is a mounting hole of the rear positioning sleeve and a dismounting hole of the rear hollow pin shaft, and also provides a support installation base for the input gear of the gear transmission set of the crushing mechanism, so that the use purpose is achieved and the installation space in the machine body is saved.

[0022] The rear positioning sleeve is provided with a notch on the rear side wall, so that sufficient meshing output space is provided for the input gear of the transmission gear set of the crushing mechanism, the flat structure of the rear main body part shell is facilitated to be arranged, and the overall structure of the rear main body part shell is more compact. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 Structure schematic view of an embodiment of the present application;

[0024] Figure 2 Structure schematic view of an embodiment of the present application; Figure 1

[0025] Figure 3 Structure schematic view of an embodiment of the present application;

[0026] Figure 4 Structure schematic view of an embodiment of the present application;

[0027] Figure 5 Hinged structure schematic view of a front hinged connection point;

[0028] Figure 6 Hinged structure schematic view of a rear hinged connection point;

[0029] Figure 7 Structure schematic view of a knuckle bearing.

[0030] REFERENCE SIGNS:

[0031] 1. swing arm; 11. swing arm shell; 111. front arm; 112. rear arm; 113. high speed end of arm support; 114. connecting arm; 12. rear-stage cutting transmission mechanism; 121. input gear; 123. spline shaft; 124. spline sleeve; 13. roller; 141. front sliding bearing; 1411. inner ring; 1412. outer ring; 1413. anti-friction layer; 1414. front seal seat; 1415. front seal ring; 1416. rear seal seat; 1417. rear seal ring; 1418. key groove; 142. rear sliding bearing;

[0032] ​2. Front body part; 21. Front body part housing; 211. First ear seat; 212. Second ear seat; 213. Front connecting base; 214. Front groove; 215. Middle groove; 22. Cutting motor; 25. Output gear; 29. Positioning pin;

[0033] 3. Rear body part; 31. Rear body part housing; 311. Rear connecting base; 3141. Mounting hole; 321. Breaking torque shaft; 322. Breaking drum shaft; 323. Transmission gear set; 32311. Input gear;

[0034] 4. Hinge structure; 411. Front hollow pin shaft; 412. Front positioning block; 413. Flat key; 421. Rear hollow pin shaft; 4211. Projection; 422. Rear positioning sleeve; 4221. Groove; 4222. Notch; 423. Flat key. DETAILED DESCRIPTION

[0035] The present application discloses a kind of thin coal seam compact type coal winning machine swing arm connecting structure (can be simply referred to as swing arm connecting structure), as shown in Figure Figures 1-7 , including swing arm shell 11 of swing arm 1 and fuselage shell, the front arm 111 and rear arm 112 of the swing arm shell are provided with left and right direction overhanging, front arm and rear arm are respectively provided with front hinge connecting hole and rear hinge connecting hole.Fuselage shell is provided with left and right direction overhanging front hinge seat and rear hinge seat, and the front hinge seat and rear hinge seat are both double-ear ear seat structure, and the two ear seats of the front hinge seat and the rear hinge seat are respectively formed between the front ear seat and the rear ear seat Form front groove 214 and rear groove, and the front ear seat of the front hinge seat and the front ear seat of the rear hinge seat form middle groove 215.Front arm and rear arm are respectively inserted into front groove and rear groove and are respectively hinged with front hinge seat and rear hinge seat.Sealing ring is installed on the front and rear end faces of front arm and rear arm, and front arm and rear arm are sealed with the end face of front hinge seat and rear hinge seat through corresponding sealing ring.The ear hole of the two ear seats of the front hinge seat is fixedly installed with front wear sleeve, and the ear hole of the two ear seats of the rear hinge seat is fixedly installed with rear wear sleeve.Front sliding bearing 141 and rear sliding bearing 142 are respectively installed in front hinge connecting hole and rear hinge connecting hole.Front sliding bearing and rear sliding bearing are respectively supported in the middle part of front hollow pin shaft 411 and rear hollow pin shaft 421, and the front and rear ends of front hollow pin shaft and rear hollow pin shaft are respectively tightly matched with two front wear sleeves and two rear wear sleeves.The inner ring of front sliding bearing and rear sliding bearing is fixed in circumference with front hollow pin shaft and rear hollow pin shaft, and the outer ring of front sliding bearing and rear sliding bearing is fixed in circumference with front arm and rear arm.Swing arm shell realizes front and rear two hinge structures 4 with fuselage shell through front and rear sliding bearings and front and rear hollow pin shafts.

[0036] A front locating block 412 is installed in the through hole of the front hollow pin shaft, and one end of the front locating block forms a concave-convex matching anti-rotation structure with one end of the front hollow pin shaft. In the embodiment shown in the drawings, the front end of the front locating block forms a concave-convex matching anti-rotation structure with the front end of the front hollow pin shaft in the radial direction. The front locating block can be fixed relative to the body shell by a fastener, and the front hollow pin shaft is also fixed relative to the body shell. Since the front wear-resistant sleeve, the front hollow pin shaft and the body shell are relatively stationary, they do not wear each other, and problems such as wear gap, shell hole enlargement and deformation will not occur. The rest of the front locating block is not in contact with the front hollow pin shaft.

[0037] A rear locating sleeve 422 is also fixed in the body shell, and one end of the rear locating sleeve forms a concave-convex matching anti-rotation structure with one end of the rear hollow pin shaft. In the embodiment shown in the drawings, the rear locating sleeve is located behind the rear hollow pin shaft, and the front end of the rear locating sleeve forms a concave-convex matching anti-rotation structure with the rear end of the rear hollow pin shaft. Similarly, the rear wear-resistant sleeve, the rear hollow pin shaft and the body shell are relatively stationary, so they do not wear each other, and problems such as wear gap, shell hole enlargement and deformation will not occur.

[0038] The outer rings of the front and rear sliding bearings are tightly fitted with the front and rear hinged connection holes, respectively, or are fastened or keyed with the front and rear arms, respectively, by fastening screws. The inner rings of the front and rear sliding bearings are keyed with the front and rear hollow pin shafts, respectively. As shown in the drawings, the inner rings of the front and rear sliding bearings are circumferentially fixed with the front and rear hollow pin shafts, respectively, by means of flat keys 413 and 423. The inner rings are provided with key grooves (for example, the key groove 1418 of the front sliding bearing shown) on the corresponding positions. The circumferential fixing measures on the inner and outer rings can guarantee the rotation of the bearings and the working reliability of the hinged structure. Figure 7

[0039] The front and rear sliding bearings are preferably joint bearings, which have large load capacity, impact resistance, corrosion resistance, wear resistance and self-aligning.

[0040] Taking the front sliding bearing as an example, the middle outer surface of the inner ring 1411 of the joint bearing is convexly 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 of the outer ring are respectively provided with front and rear sealing seats 1414 and 1416. The front and rear sealing seats are respectively provided with front and rear sealing rings 1415 and 1417 between the inner ring. By providing dust separation structures at both ends, the cleanliness of the internal friction pair can be guaranteed. A uniform-thickness wear-reducing layer 1413 is provided between the inner and outer rings to reduce the wear of the sliding pair of the bearing. The use of the joint bearing can improve the service life of the sliding pair.

[0041] ​The main body of the swing arm housing is a left and right extending arm frame, and a rear stage cutting transmission mechanism is installed in the arm frame. In order to distinguish the two ends of the arm frame, the input end gear and the output end gear of the rear stage cutting transmission mechanism are respectively referred to as the high speed end 113 of the arm frame and the low speed end of the arm frame. The front side of the low speed end of the arm frame is provided with a planetary reduction mechanism and a drum 13. A connecting arm 114 is provided in the middle of the arm frame, and the root of the front arm is connected to the connecting arm. The root of the rear arm is connected to the middle of the arm frame. The front arm and the rear arm are respectively located in front of and behind the high speed end of the arm frame. The front hinged connection hole, the rear hinged connection hole and the input end gear 121 of the rear stage cutting transmission mechanism are coaxial. The high speed end of the arm frame is located in the middle groove.

[0042] The cutting motor 22 and the front stage cutting transmission mechanism are installed in the fuselage housing, and the output shaft of the cutting motor is coaxially connected with the input end gear of the front stage cutting transmission mechanism. The output end gear of the front stage cutting transmission mechanism is located in front of the front lug of the rear hinged seat and in front of the rear wear 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. The power transmission points of the front and rear stage cutting transmission mechanisms are located between the front and rear hinged connection points of the swing arm housing and the fuselage housing, and the wear of the front and rear hinged connection points has little effect on the transmission accuracy of power transmission.

[0043] The input end gear core of the rear stage cutting transmission mechanism is provided with a rear stage spline hole, and a spline sleeve 124 with an inner spline and an outer spline is installed in the rear stage spline hole. The spline hole of the spline sleeve and the spline hole of the output end gear core of the front stage cutting transmission mechanism are simultaneously spline coupled with a spline shaft 123. The front stage cutting transmission mechanism, the spline shaft and the spline sleeve, and the spline sleeve and the rear stage cutting transmission mechanism are all spline coupled. The spline coupling structure with side clearance at multiple places can significantly increase the radial floating amount, and because the related parts forming the spline coupling structure can automatically center, even if the coaxiality of the front and rear hinged connection points is reduced due to wear, the influence on the power transmission between the front and rear stage cutting transmission mechanisms is also small, so the power transmission reliability is improved.

[0044] The overhanging end outer surface of the front arm, the high-speed end outer surface of the arm support and the overhanging end outer surface of the rear arm are provided as a first set of convex circular cylindrical surfaces coaxial with the front hinged connection hole, and the corresponding front groove, middle groove and rear groove are provided as a first set of concave circular cylindrical surfaces coaxial with the front hinged connection hole, and the first set of concave circular cylindrical surfaces correspond to the first set of convex circular cylindrical surfaces one by one and are spaced from each other. The overhanging end outer surface of the two lug seats of the front hinged seat is provided as a second set of convex circular cylindrical surfaces coaxial with the front hinged connection hole, and the side of the connecting arm close to the high-speed end of the arm support in the left-right direction is provided as a second set of concave circular cylindrical surfaces coaxial with the front hinged connection hole, and the second set of concave circular cylindrical surfaces correspond to the second set of convex circular cylindrical surfaces one by one and are spaced from each other. By controlling the size of the above-mentioned spacing within a suitable range, the accumulation of coal and rock into the swing arm shell and the fuselage shell during the up-down swing of the swing arm shell can be effectively controlled, and the smooth swing can be ensured.

[0045] The fuselage shell is preferably a split structure, including a front main body part shell 21 of a front main body part 2 and a rear main body part shell 31 of a rear main body part 3 which are butted and fixedly connected to each other. The left and right edges of the front main body part shell are each provided with a first lug seat 211, a second lug seat 212 and a front connecting base 213 in sequence from front to back. The first lug seat and the second lug seat are respectively configured as the front and rear lug seats of the front hinged seat. The output gear of the front-stage cutting transmission mechanism is located in the front connecting base.

[0046] The rear main body part shell includes a rear base and a rear connecting base 311 which is suspended forward from the middle of the rear base. Two rear wear-resistant sleeves are respectively located in the rear connecting base and the front part of the rear base. The front connecting base and the rear connecting base are butted and fixed to form the front lug seat of the rear hinged seat, and the rear groove is formed between the rear base and the rear connecting base. The front and rear hinged connection points are respectively located on the front main body part shell and the rear main body part shell.

[0047] The rear part of the rear base is provided with a mounting hole 3141, and the rear positioning sleeve is fixedly installed in the mounting hole. The hole diameter of the mounting hole is greater than the outer diameter of the rear hollow pin shaft. The front end face of the rear positioning sleeve is provided with a plurality of grooves 4221, and the rear end face of the rear hollow pin shaft is provided with a plurality of protrusions 4211. The grooves and the protrusions correspond to each other, and the front end face of the rear positioning sleeve and the rear end face of the rear hollow pin shaft are embedded with each other to form the concave-convex matching anti-rotation structure. The mounting hole is both the mounting hole of the rear positioning sleeve 422 and the dismounting hole of the rear hollow pin shaft 421.

[0048] The rear end face of the front connecting base 213 is in close contact with the front end face of the rear connecting base 311, and the front connecting base and the rear connecting base are positioned by the left and right two positioning pins 29 to ensure that the front and rear hinged connection points can be reliably kept coaxial. The positioning pin is a hollow positioning pin, and the rear wear-resistant sleeve is located on the inside of the central through hole of the positioning pin.

[0049] The rear side wall of the rear positioning sleeve is provided with a notch 4222. A crushing mechanism is installed in the rear base. The crushing mechanism includes a crushing torque shaft 321, a transmission gear set 323 and a crushing roller shaft 322 connected in turn. The transmission gear set is arranged left and right and passes through the notch, and the input gear 32311 of the transmission gear set is installed in the rear positioning sleeve 422 and is supported and installed based on the rear positioning sleeve, and the notch provides meshing output space for the input gear 32311 of the transmission gear set. The crushing torque shaft passes through the rear hollow pin shaft and the rear positioning sleeve, the front end is coaxially splined connected with the output gear 25 of the front-stage cutting transmission mechanism, and the rear end is coaxially splined connected with the input gear 32311 of the transmission gear set. The above-mentioned parts of the crushing mechanism are arranged to facilitate the flat structure of the rear main body part shell, and the overall structure of the rear main body part shell is more compact.

[0050] Unless specifically specified, the front and back mentioned herein refer to the direction close to the coal wall and away from the coal wall respectively.

Claims

1. A connecting structure of a swing arm of a compact coal cutter for thin coal seams, characterized by: The utility model provides a swing arm shell and fuselage shell, the main body of swing arm shell is left and right extension's arm support, and the rear cutting transmission mechanism is installed in arm support, and the input end gear and output end gear of rear cutting transmission mechanism are respectively high speed end and low speed end of arm support, and the middle part of arm support is equipped with the connecting arm that suspends from arm support to forward, the front arm and rear arm that suspend in left and right direction are equipped on swing arm shell, the root of front arm is connected with connecting arm, and the root of rear arm is connected in the middle part of arm support, and front arm and rear arm are respectively located in front of high speed end and rear of arm support, and front hinge connecting hole and rear hinge connecting hole are respectively equipped on front arm and rear arm, and front hinge connecting hole, rear hinge connecting hole and the input end gear of rear cutting transmission mechanism are coaxial, and the front hinge seat and rear hinge seat that suspend in left and right direction are equipped on fuselage shell, and the front hinge seat and rear hinge seat are both double-ear seat structure, and the two ear seats of front hinge seat and rear hinge seat form front groove and rear groove respectively, and the middle groove is formed between the rear ear seat of front hinge seat and the front ear seat of rear hinge seat, and front arm and rear arm are inserted into front groove and rear groove and are hinged with front hinge seat and rear hinge seat respectively, and the high speed end of arm support is located in the middle groove, and the ear hole of two ear seats of front hinge seat is fixedly installed with front wear sleeve, and the ear hole of two ear seats of rear hinge seat is fixedly installed with rear wear sleeve, and front sliding bearing and rear sliding bearing are respectively installed in front hinge connecting hole and rear hinge connecting hole, and front sliding bearing and rear sliding bearing are supported in the middle part of front hollow pin shaft and rear hollow pin shaft respectively, and the front and rear ends of front hollow pin shaft and rear hollow pin shaft are tightly matched with two front wear sleeves and two rear wear sleeves respectively, and the inner ring of front sliding bearing and rear sliding bearing is fixed in the circumference of front hollow pin shaft and rear hollow pin shaft respectively, and the outer ring of front sliding bearing and rear sliding bearing is fixed in the circumference of front arm and rear arm respectively, and the through hole of front hollow pin shaft is installed with front positioning block, and one end of front positioning block and one end of front hollow pin shaft form the concave-convex matched anti-rotation structure and front positioning block is fixed relative to fuselage shell, and rear positioning sleeve is also fixed in fuselage shell, and one end of rear positioning sleeve and one end of rear hollow pin shaft form the concave-convex matched anti-rotation structure, and the front cutting transmission mechanism is installed in fuselage shell, and the output end gear of front cutting transmission mechanism is located in the front of rear ear seat of rear hinge seat and the front of rear wear sleeve, and the output end gear of front cutting transmission mechanism is coaxially connected with the input end gear of rear cutting transmission mechanism.

2. The connecting structure of the swing arm of the thin seam compact coal mining machine according to claim 1, characterized in that: The outer ring of front sliding bearing and rear sliding bearing is tightly matched with front hinge connecting hole and rear hinge connecting hole respectively, or is keyed connected with front arm and rear arm respectively or is fastened through fastening screw, and the inner ring of front sliding bearing and rear sliding bearing is keyed connected with front hollow pin shaft and rear hollow pin shaft respectively.

3. The connecting structure of the swing arm of the thin seam compact coal mining machine according to claim 2, characterized in that: Front sliding bearing and rear sliding bearing adopt joint bearing, and the middle part outer surface of inner ring of joint bearing is convex and drum-shaped, and the outer ring of joint bearing is covered on the middle part of inner ring, and front sealing seat and rear sealing seat are respectively arranged on the front and rear of outer ring, and the wear-reducing layer of uniform thickness is arranged between inner ring and outer ring, and front sealing ring and rear sealing ring are respectively arranged between front sealing seat and inner ring and rear sealing seat and inner ring.

4. The connecting structure of the swing arm of the thin seam compact coal mining machine according to claim 3, characterized in that: The input end gear core of the rear cutting transmission mechanism is provided with a rear spline hole, and a spline sleeve with an inner spline and an outer spline is installed in the rear spline hole.

5. The thin-seam compact miner swing arm connection of claim 4, wherein: 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 as a first group of convex circular cylindrical surfaces coaxial with the front hinged connection hole, and the corresponding front groove, middle groove and rear groove are arranged as a first group of concave circular cylindrical surfaces coaxial with the front hinged connection hole, and the first group of concave circular cylindrical surfaces correspond to the first group of convex circular cylindrical surfaces one by one and are spaced from each other; the outer surface of the overhanging end of the two lug seats of the front hinged seat is arranged as a second group of convex circular cylindrical surfaces coaxial with the front hinged connection hole, and the side surface of the connecting arm close to the high-speed end of the arm support in the left-right direction is arranged as a second group of concave circular cylindrical surfaces coaxial with the front hinged connection hole, and the second group of concave circular cylindrical surfaces correspond to the second group of convex circular cylindrical surfaces one by one and are spaced from each other.

6. The connection structure of the oscillating arm of the thin seam compact coal cutter according to claim 1, 2, 3, 4 or 5, characterized in that: The fuselage shell is of a split structure, comprising a front main body part shell and a rear main body part shell which are butted and fixedly connected to each other, the left and right edges of the front main body part shell are each provided with a first lug seat, a second lug seat and a front connecting base from front to back in sequence, the first lug seat and the second lug seat are respectively arranged as front and rear lug seats of the front hinged seat, the output end gear of the front cutting transmission mechanism is located in the front connecting base, the rear main body part shell comprises a rear base body and a rear connecting base which is forwardly overhanging left and right from the middle part of the rear base body, a front rear wear-resistant sleeve and a rear rear wear-resistant sleeve are respectively located in the rear connecting base and the front part of the rear base body, the front connecting base and the rear connecting base are butted and fixed to form the front lug seat of the rear hinged seat, and the rear base body and the rear connecting base form the rear groove.

7. The thin-seam compact miner swing arm connection of claim 6, wherein: The rear part of the rear base body is provided with a mounting hole, the rear positioning sleeve is fixedly installed in the mounting hole, the hole diameter of the mounting hole is greater than the outer diameter of the rear hollow pin shaft, a plurality of grooves are arranged on the front end face of the rear positioning sleeve, a plurality of protrusions are arranged on the rear end face of the rear hollow pin shaft, the grooves correspond to the protrusions one by one, and the front end face of the rear positioning sleeve and the rear end face of the rear hollow pin shaft are embedded with each other.

8. The thin-seam compact miner swing arm connection of claim 7, wherein: The rear end face of the front connecting base and the front end face of the rear connecting base are in close contact, the front connecting base and the rear connecting base are positioned by the two left and right positioning pins, the positioning pins are hollow positioning pins, and the rear wear-resistant sleeves are located on the inner side of the center through holes of the positioning pins.

9. The thin-seam compact miner swing arm connection of claim 8, wherein: A notch is arranged on the side wall of the rear positioning sleeve, a crushing mechanism is installed in the rear base body, the crushing mechanism comprises a crushing torque shaft, a transmission gear set and a crushing roller shaft which are transmissionally connected in sequence, the transmission gear set is arranged to extend left and right and passes through the notch, an input end gear of the transmission gear set is installed in the rear positioning sleeve, the crushing torque shaft passes through the rear hollow pin shaft and the rear positioning sleeve, the front end of the crushing torque shaft is coaxially spline-coupled with the output end gear of the front cutting transmission mechanism, and the rear end of the crushing torque shaft is coaxially spline-coupled with the input end gear of the transmission gear set.

Images