CN114382479A - Swing arm of thin coal seam mining machine - Google Patents
Swing arm of thin coal seam mining machine Download PDFInfo
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- CN114382479A CN114382479A CN202210045806.7A CN202210045806A CN114382479A CN 114382479 A CN114382479 A CN 114382479A CN 202210045806 A CN202210045806 A CN 202210045806A CN 114382479 A CN114382479 A CN 114382479A
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- pin shaft
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- arm support
- swing arm
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- 238000005065 mining Methods 0.000 title claims abstract description 50
- 239000003245 coal Substances 0.000 title claims abstract description 36
- 238000005520 cutting process Methods 0.000 claims abstract description 69
- 230000007246 mechanism Effects 0.000 claims abstract description 43
- 230000005540 biological transmission Effects 0.000 claims abstract description 32
- 238000007789 sealing Methods 0.000 claims description 20
- 238000001816 cooling Methods 0.000 claims description 14
- 230000009467 reduction Effects 0.000 claims description 8
- 238000005728 strengthening Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 4
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 230000005484 gravity Effects 0.000 abstract description 3
- 238000004904 shortening Methods 0.000 abstract description 2
- 210000000245 forearm Anatomy 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/06—Machines slitting solely by one or more cutting rods or cutting drums which rotate, move through the seam, and may or may not reciprocate
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention relates to a swing arm of a thin coal seam mining machine, which 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 arranged in the arm support, 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 a cutting motor to serve as a pin shaft to be mounted in the front pin shaft mounting hole and the rear pin shaft mounting hole are respectively coaxial with an input end gear of the cutting transmission mechanism. The invention can provide a larger mining range, is beneficial to shortening the machine body and improving the gravity center problem of the coal mining machine.
Description
Technical Field
The invention relates to a rocker arm structure of a coal mining machine, which is particularly suitable for a thin coal seam coal mining machine and is beneficial to providing a large mining range and large cutting power for the thin coal seam coal mining machine.
Background
In the existing thin seam coal mining machine, a cutting motor 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 fixed part, and the cutting motor and the main body of the cutting transmission system are arranged on the fixed part, so that the structure of the fixed part is too complex, the left and right lengths of the machine body suspension section are too long, the weight is too large, and the gravity center problem of the whole machine still has great influence on the stress of the whole machine. Moreover, the coal mining machine with a long body structure cannot perform a straight-pushing process similar to a short-wall coal mining machine, and the inclined cutting feed at two ends is long in time, so that the mining efficiency is limited to a certain extent.
Disclosure of Invention
The invention aims to provide a swing arm of a thin coal seam mining machine, which not only can provide a larger mining range, but also is beneficial to shortening a machine body and improving the gravity center problem of the mining machine.
The main technical scheme of the invention is as follows:
the utility model provides a thin seam shearer swing arm, including the swing arm casing, the main part of swing arm casing is the cantilever crane of controlling extension, install cutting drive mechanism in the cantilever crane, the high-speed end and the low-speed end of cantilever crane are regarded as respectively to cutting drive mechanism's input gear and output gear place end, the cantilever crane middle part is equipped with the linking arm that cantilevers forward from the cantilever crane, be equipped with forearm and the postbrachium that cantilevers left or right from the linking arm on the linking arm, the high-speed end of forearm, postbrachium and cantilever crane is parallel to each other and by preceding interval arrangement backward in proper order, be equipped with respectively on forearm and the postbrachium and be used for supplying the cutting motor to act as the round pin axle and install preceding round pin axle mounting hole and back round pin axle mounting hole wherein, preceding round pin axle mounting hole and back round pin axle mounting hole all are coaxial with cutting drive mechanism's input gear.
The outer surface of the overhanging end of the front arm, the outer surface of the overhanging end of the rear arm and the outer surface of the high-speed end of the arm support are preferably set to be convex arc cylindrical surfaces coaxial with the front pin shaft mounting hole, and the side surface of the connecting arm close to the high-speed end of the arm support is set to be concave arc cylindrical surfaces coaxial with the front pin shaft mounting hole.
The swing arm of the low seam mining machine further comprises a roller, a roller connecting sleeve and a planetary speed reducing mechanism, the planetary speed reducing mechanism is installed at the low-speed end of the arm support, the output end of the planetary speed reducing mechanism is a planet carrier, the planet carrier is in splined connection with the roller connecting sleeve, the roller is coaxially and fixedly sleeved on the roller connecting sleeve, and the roller connecting sleeve are centered through a polygonal spigot structure.
The connecting arm is provided with an inner cavity and is communicated with the inner cavity of the arm support, and the inner cavity of the connecting arm is internally provided with a plurality of serially connected intensified coolers.
A plurality of cooling pipes are arranged in each intensified cooler, and the plurality of cooling pipes can be connected in series or in parallel.
The middle part of the arm support is provided with a bulge structure protruding backwards, a cavity inside the bulge structure is an auxiliary cavity, and the auxiliary cavity is a part of an inner cavity of the arm support.
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.
And bearings are further mounted in the front pin shaft mounting hole and the rear pin shaft mounting hole, and outer rings of the bearings are fixed relative to the front arm and the rear arm.
The bearing preferably adopts a joint bearing, an antifriction layer is arranged between an inner ring and an outer ring of the joint bearing, a sealing seat is respectively arranged at the radial outer side of the inner ring and at the front end and the rear end of the outer ring, sealing grooves are respectively arranged on the surface of a radial inner hole and the outer end surface of the sealing seat, and a sealing ring is arranged in each sealing groove.
The swing arm of the low seam mining machine can further comprise a cutting motor, a shell of the cutting motor is rotatably supported in the front and rear two sets of joint bearings, the shell of the cutting motor and an inner ring of the bearing are fixed in an angular direction through a flat key, and an output shaft of the cutting motor is in coaxial transmission connection with an input end gear of the cutting transmission mechanism.
An intermediate gear and a gear pump are further arranged in the inner cavity of the arm support, the input end gear is externally meshed with the intermediate gear, and the intermediate gear is coaxially connected with the gear pump.
The invention has the beneficial effects that:
the swing arm can be hinged with the body of the coal mining machine by taking the cutting motor as a pin shaft, so that the left and right lengths of the suspended body section of the coal mining machine are shortened, and the structure of the cutting mechanism is simplified.
The invention adopts the specific structural design that the front arm, the rear arm and the high-speed end of the arm support are sequentially arranged at intervals from front to back, 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 part is separated from the unstressed part, so that the transmission part in the arm support can be ensured to be in a good unstressed state, and the improvement of the transmission precision is facilitated.
The roller and the roller connecting sleeve adopt a relatively compact positioning and connecting structure, so that the connecting reliability is ensured, the front and rear length of the planetary speed reducing mechanism is greatly shortened, and the structural space arrangement of the swing arm of the high-power-density thin coal seam mining machine is facilitated.
The cutting motor is supported on the front arm and the rear arm through the joint bearing, the concentricity between the front pin shaft mounting hole and the shell of the cutting motor and the concentricity between the front pin shaft mounting hole and the shell of the cutting motor can be kept, and the transmission precision between the cutting motor and the cutting transmission mechanism is improved. The antifriction layer 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, the two ends of the antifriction layer are sealed, the inside of the joint bearing can be kept in a good lubricating condition, and accordingly, the improvement of the transmission precision between the cutting motor and the cutting transmission mechanism is facilitated.
The input end gear drives the middle gear and the gear pump to rotate besides driving other parts of the cutting transmission mechanism to rotate. The intermediate gear and the gear pump form a power source of a hydraulic system, the power of the hydraulic system comes from the cutting motor, and an independent power source is not required to be additionally arranged.
The arrangement of the auxiliary cavity not only increases the oil cavity of the arm support, but also increases the shell strength of the arm support.
The connecting arm is also provided with an inner cavity and is communicated with the inner cavity of the arm support, so that the oil storage volume in the shell of the swing arm is increased. Moreover, a plurality of serially connected strengthening coolers are arranged in the inner cavity of the connecting arm and used for strengthening the cooling oil cavity so as to improve the cooling effect of the high-power density swing arm.
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.
Drawings
FIG. 1 is a front view of an assembly of a swing arm housing with a drum and cutting drive mounted thereon;
FIG. 2 is a top cross-sectional view of FIG. 1;
FIG. 3 is a schematic structural view of one embodiment of the spherical plain bearing;
FIG. 4 is a cross-sectional view A-A of FIG. 2;
FIG. 5 is an enlarged view of the drum mounting structure;
FIG. 6 is a cross-sectional view C-C of FIG. 5;
fig. 7 is a sectional view B-B of fig. 2.
Reference numerals:
11. a swing arm housing; 111. a forearm; 1110. the oil cylinder is hinged with the base; 1111. the outer surface of the overhanging end of the forearm; 112. a rear arm; 1121. the outer surface of the overhanging end of the rear arm; 113. a boom; 1131. a 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; 1143. an inner cavity of the connecting arm; 115. an auxiliary chamber; 12. a cutting transmission mechanism; 121. an input end gear; 122. a planetary reduction mechanism; 1221. a planet carrier; 1222. a bearing; 1223. a bearing seat; 1224. a roller connecting sleeve; 123. an intermediate gear; 13. a drum; 132. a polygonal inner spigot; 14. a bearing; 141. an inner ring; 142. an outer ring; 143. an anti-attrition layer; 144. a sealing seat; 145. a seal ring; 146. a flat bond; 16. an intensive cooler; 161. the cooling pipes are connected in series with the intensified cooler; 162. the cooling pipes are connected with the intensified cooler in parallel; 17. a gear pump.
Detailed Description
The invention discloses a swing arm (which can be simply referred to as a swing arm) of a thin coal seam mining machine, which comprises a swing arm shell 11, wherein the main body of the swing arm shell is an arm support 113 extending left and right, and a cutting transmission mechanism 12 is arranged in the arm support. The cutting transmission mechanism adopts a fixed-shaft 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 a high-speed end and a 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 front arm, the rear arm and the high-speed end 1131 of the arm support are parallel to each other and are arranged at intervals from front to back, namely, for a right swing arm shell of the 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 and a rear pin shaft mounting hole which are used for allowing the cutting motor to serve as a pin shaft to be mounted in the front pin shaft mounting hole and the rear pin shaft mounting hole, and the front pin shaft mounting hole and the rear pin shaft mounting hole are coaxial with an input gear of the cutting transmission mechanism so as to ensure that the mounted cutting motor and the input gear transmit power coaxially. 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 outer surface 1111 of the overhanging end of the front arm, the outer surface 1121 of the overhanging end of the rear arm and the outer surface of the high-speed end of the arm support are preferably set to be convex arc cylindrical surfaces coaxial with the front pin shaft mounting hole, the corresponding edge of the body of the coal mining machine can be set to be concave arc cylindrical surfaces coaxial with the front pin shaft mounting hole, and the width of a gap between the outer surface 1121 of the overhanging end of the rear arm and the outer surface of the high-speed end of the arm support and the corresponding concave arc cylindrical surfaces on the body is controlled within a proper range, so that the coal rock can be effectively controlled to be accumulated to enter between the swinging arm and the body in the rotating process of the swinging arm relative to the body.
Similarly, the side surface 1141 of the connecting arm close to the high-speed end of the arm support is an inward 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 and the body in the process that the swing arm rotates relative to the body.
An oil cylinder hinged seat 1110 can be further arranged at the overhanging end of the front arm and used for installing a height-adjusting oil cylinder between the swing arm shell and the body of the coal mining machine. The heightening oil cylinder can stretch and retract to drive the swing arm shell to swing up and down.
The swing arm of the thin coal seam mining machine further comprises a roller 13, a roller connecting sleeve 1224 and a planetary speed reducing mechanism 122, wherein the planetary speed reducing mechanism is installed at the low-speed end of the arm support, specifically, a gear ring and a front bearing seat 1223 and a rear bearing seat 1223 are fixedly installed at the low-speed end of the arm support, bearings 1222 are installed in the two bearing seats respectively, a planet carrier 1221 is rotatably supported on the front bearing seat and the rear bearing seat, the planet carrier 1221 is an output end of the planetary speed reducing mechanism, a shaft-shaped portion of the roller connecting sleeve is inserted into a core portion of the planet carrier and is connected with the planet carrier in a spline mode, the roller is coaxially sleeved on an end flange structure of the roller connecting sleeve, a polygonal inner spigot 132 on the roller is matched with a polygonal spigot of the end flange structure of the roller connecting sleeve to achieve centering of the roller, and the flange structure is fixedly connected with the planet carrier and the roller through bolts. The planetary reduction mechanism is located at the core of the drum. The roller and the roller connecting sleeve adopt a relatively compact positioning and connecting structure, and particularly, a spline connecting part of the roller connecting sleeve and the planet carrier is arranged at the core part of the planet carrier, so that the connecting reliability can be ensured, the front-back length of the planetary speed reducing mechanism can be greatly shortened, and the structural space arrangement of a swing arm of a high-power-density thin seam coal mining machine is facilitated.
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 can be transferred to the body of the coal mining machine 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 the transmission part in the arm support can be ensured to be in a good unstressed state, and the transmission precision is improved.
The side 1142 of the link arm near the low speed end of the boom is preferably configured as an inwardly concave cylindrical surface coaxial with the output gear of the cutting drive. 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 connecting arm is provided with an inner cavity, and the inner cavity 1143 of the connecting arm is communicated with the inner cavity of the arm support. The inner cavity provided with the connecting arm increases the oil storage volume in the shell of the swing arm. A plurality of series-connected intensified coolers 16 are arranged in the inner cavity of the connecting arm. Through establishing ties a plurality of intensive coolers, increased cooling length, can strengthen the cooling to narrow oil bath, improve the cooling effect of high-power density swing arm.
A plurality of cooling pipes are arranged in the intensified cooler, and the plurality of cooling pipes can be connected in series or in parallel. In the embodiment shown in the drawings, two cooling pipes in the enhanced cooler 161 are connected in series, and two cooling pipes in the enhanced cooler 162 are connected in parallel.
The middle part of the arm support is provided with a bulge structure protruding backwards, a cavity inside the bulge structure is an auxiliary cavity 115, and the auxiliary cavity is a part of an inner cavity of the arm support, so that an oil cavity of the arm support is increased, and the shell strength of the arm support is increased.
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 platform above the coal platform in the process of swinging the shell of the swinging arm up and down, and finally the mining range of the whole swinging arm can be enlarged.
The front pin shaft mounting hole and the rear pin shaft mounting hole are also provided with a bearing 14, and the outer ring of the bearing is 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 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 load at the hinged part is mostly born by the bearing, so that the swing arm shell, the machine body shell and the cutting motor can be well protected from or less influenced, and the connection reliability is kept.
The bearing adopts a joint bearing, and has the advantages of high load capacity, impact resistance, corrosion resistance, wear resistance and self-aligning. 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. An anti-wear layer 143 is provided between the inner ring 141 and the outer ring 142 of the knuckle bearing to reduce wear of the sliding pair of the bearing. And a sealing seat 144 is respectively arranged at the radial outer side of the inner ring and at the front end and the rear end of the outer ring, sealing grooves are respectively arranged on the surface of a radial inner hole and the outer end surface of the sealing seat, and a sealing ring 145 is arranged in each sealing groove and is respectively used for realizing the radial sealing between the inner ring and the sealing seat and the end surface sealing between the sealing seat and the machine body. By adopting the joint bearing, the service life of the sliding pair can be prolonged, and the transmission precision between the cutting motor and the cutting transmission mechanism can be improved.
The swing arm of the thin seam mining machine can further comprise a cutting motor, a shell of the cutting motor is rotatably supported in the front and rear two sets of joint bearings, the shell of the cutting motor and an inner ring of the bearing can be fixed at an angle through a flat key 146, and an output shaft of the cutting motor is in coaxial transmission connection with an input end gear of a cutting transmission mechanism.
An intermediate gear 123 and a gear pump 17 are further arranged in the inner cavity of the arm support, the input end gear is externally meshed with the intermediate gear, and the intermediate gear is coaxially connected with the gear pump. The input end gear rotates under the driving of the cutting motor, and the input end gear drives the intermediate gear and the gear pump to rotate except for driving other parts of the cutting transmission mechanism to rotate. The intermediate gear and the gear pump form a power source of a hydraulic system, the power of the hydraulic system comes from the cutting motor, and an independent power source is not required to be additionally arranged.
The front and back as used herein refers to the direction toward and away from the coal wall, respectively, unless specifically indicated otherwise.
Claims (11)
1. The utility model provides a thin coal seam coal-winning machine swing arm which characterized in that: the cutting mechanism is installed in the arm support, the high-speed end and the low-speed end of the arm support are respectively served as the positions of an input end gear and an output end gear of the cutting mechanism, 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 installation hole and a rear pin shaft installation hole which are used for serving as a pin shaft for installing a cutting motor are respectively arranged on the front arm and the rear arm, and the front pin shaft installation hole and the rear pin shaft installation hole are coaxial with the input end gear of the cutting mechanism.
2. The swing arm for a low seam mining machine according to claim 1, wherein: the outer surface of the overhanging end of the front arm, the outer surface of the overhanging end of the rear arm and the outer surface of the high-speed end of the arm support are all arranged into convex arc cylindrical surfaces which are coaxial with the front pin shaft mounting hole, and the side surface of the connecting arm close to the high-speed end of the arm support is arranged into concave arc cylindrical surfaces which are coaxial with the front pin shaft mounting hole.
3. The swing arm for a low seam mining machine according to claim 2, wherein: the planetary reduction mechanism is arranged at the low-speed end of the arm support, the output end of the planetary reduction mechanism is a planet carrier, the planet carrier is in splined connection with the roller connecting sleeve, the roller is coaxially and fixedly sleeved on the roller connecting sleeve, and the roller is centered between the roller connecting sleeve and the roller connecting sleeve through a polygonal spigot structure.
4. The swing arm for a low seam mining machine according to claim 1, wherein: the connecting arm is provided with an inner cavity and is communicated with the inner cavity of the arm support, and the inner cavity of the connecting arm is internally provided with a plurality of serially connected intensified coolers.
5. The swing arm for a low seam mining machine according to claim 4, wherein: each strengthening cooler is internally provided with a plurality of cooling pipes which are connected in series or in parallel.
6. The swing arm for a low seam mining machine according to claim 1, wherein: the middle part of the arm support is provided with a bulge structure protruding backwards, a cavity inside the bulge structure is an auxiliary cavity, and the auxiliary cavity is a part of an inner cavity of the arm support.
7. The swing arm for a low seam mining machine according to 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.
8. The swing arm for a low seam mining machine according to claim 1, 2, 3, 4, 5, 6 or 7, wherein: and bearings are further mounted in the front pin shaft mounting hole and the rear pin shaft mounting hole, and outer rings of the bearings are fixed relative to the front arm and the rear arm.
9. The swing arm for a low seam mining machine according to claim 8, wherein: the bearing adopts a joint bearing, an antifriction layer is arranged between an inner ring and an outer ring of the joint bearing, a sealing seat is respectively arranged at the radial outer side of the inner ring and at the front end and the rear end of the outer ring, sealing grooves are respectively arranged on the surface of a radial inner hole and the outer end surface of the sealing seat, and a sealing ring is arranged in each sealing groove.
10. The swing arm for a low seam mining machine according to claim 9, wherein: the cutting mechanism is characterized by further comprising a cutting motor, a shell of the cutting motor is rotatably supported in the front and rear two sets of joint bearings, the shell of the cutting motor and the inner ring of the bearings are fixed in an angular mode through flat keys, and an output shaft of the cutting motor is in coaxial transmission connection with an input end gear of the cutting transmission mechanism.
11. The swing arm for a low seam mining machine according to claim 10, wherein: an intermediate gear and a gear pump are further arranged in the inner cavity of the arm support, the input end gear is externally meshed with the intermediate gear, and the intermediate gear is coaxially connected with the gear pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210045806.7A CN114382479A (en) | 2022-01-16 | 2022-01-16 | Swing arm of thin coal seam mining machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210045806.7A CN114382479A (en) | 2022-01-16 | 2022-01-16 | Swing arm of thin coal seam mining machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114382479A true CN114382479A (en) | 2022-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210045806.7A Pending CN114382479A (en) | 2022-01-16 | 2022-01-16 | Swing arm of thin coal seam mining machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114382479A (en) |
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2022
- 2022-01-16 CN CN202210045806.7A patent/CN114382479A/en active Pending
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