CN212337278U - Guide traction system of short-span thin coal seam coal mining machine - Google Patents

Abstract

The utility model relates to a guiding traction system of a short-span thin coal seam coal mining machine, which comprises a guiding device, a traction connecting device and a scraper conveyor, wherein the guiding device comprises a guiding sliding shoe and a track, the track is linearly laid in the left and right directions, the guiding sliding shoe is arranged at the rear part of a machine body, the machine body is supported from the lower part, the guide sliding shoes straddle on the track through the guide grooves and are connected with the track in a left-right sliding way, the traction connecting device comprises a connecting plate, a connecting hook, a chain groove body and a traction chain, one end of the connecting plate is hinged on the machine body, the other end of the connecting plate is hinged with one end of the connecting hook, the two hinged axes are extended left and right, the other end of the connecting hook is arranged into a cylinder structure with the axis extending left and right, the cylinder structure is arranged in the chain groove and is in sliding connection with the chain groove, the drag chain is connected to the cylinder structure, and the track and the chain groove body are both arranged on the groove body of the scraper conveyor. The utility model discloses can solve the wearing and tearing problem of thin or ultra-thin coal seam coal-winning machine's chain traction.

Description

Guide traction system of short-span thin coal seam coal mining machine

Technical Field

The utility model relates to a coal-winning machine direction traction system especially is applicable to the short span thin seam coal-winning machine of thin or extremely thin coal seam exploitation.

Background

For mining of thin or extremely thin coal seams, the mining height is often low (for example, the mining height of some coal seams is required to reach 0.8m), so that the height of a machine face of a coal mining machine is required to be very low, but the coal passing space under the machine body cannot be too low, otherwise, the circulation of coal is influenced, and how to solve the contradiction between the height of the machine face and the coal passing space is a difficulty of the structural design of the thin or extremely thin coal seam coal mining machine.

In order to solve the problems, the solution in the industry is to adopt chain traction, and the scheme can greatly improve the coal passing space above the scraper conveyor and below the scraper conveyor, but has the problem of abrasion of a chain traction system. In order to prevent potential safety hazards to operators caused by breakage of a drag chain of a coal mining machine, the drag chain is generally arranged in a chain groove on conveying equipment. However, the existing chain traction guide device is of an integrated structure, and is mostly fixedly connected with a coal mining machine, so that the capacity of adapting to fluctuation is poor, and on the other hand, a chain groove not only needs to bear traction force, but also needs to bear cutting counterforce of the coal mining machine, so that the abrasion of the chain groove is aggravated, and after the abrasion, the whole conveying equipment is inconvenient to replace or even needs to be replaced, and the whole service life of the conveying equipment is seriously influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a direction traction system of short span thin seam coal-winning machine can solve the wearing and tearing problem of thin or extremely thin seam coal-winning machine's chain traction.

The utility model discloses a main technical scheme has:

a guide traction system of a short-span thin coal seam mining machine comprises a guide device, a traction connecting device and a scraper conveyor, wherein the guide device comprises a guide sliding shoe and a track, the track is formed by sequentially arranging a plurality of track units in a left-right direction in a line shape from head to tail, the guide sliding shoe is detachably mounted at the rear part of a machine body of the mining machine and supports the machine body from the lower part, the guide sliding shoe rides on the track through a guide groove of the guide sliding shoe and is in left-right sliding connection with the track, the traction connecting device comprises a connecting plate, a connecting hook, a chain groove body and a traction chain, one end of the connecting plate is hinged on the machine body, the other end of the connecting plate is hinged with one end of the connecting hook, hinged axes of the two positions are extended leftwards and rightwards, the other end of the connecting hook is arranged into a cylinder structure with axes extending leftwards and rightwards, and the cylinder structure, and with chain cell body sliding connection, the drag chain is connected in the cylinder structure, track and chain cell body all can be dismantled and install on the cell body of scraper conveyor.

The upper portion of the guide sliding shoe is hinged to the machine body through a rotary pin in a penetrating mode, the hinge axis extends forwards and backwards, gaps are reserved between the guide sliding shoe and the machine body in the vertical and front-back directions, a pin hole formed in the guide sliding shoe in a penetrating mode and provided with the rotary pin is a waist-shaped hole, the left width and the right width of the pin hole are larger than the upper width and the lower width of the pin hole, and the front side face and the rear side face of the guide sliding shoe are smooth transition surfaces, wherein the middle portion of the front side face and the.

Regarding the traction connecting device, one end of the connecting plate is hinged to the machine body through the penetrating upper connecting pin, and the diameter of the pin hole in the connecting plate, which is used for the penetrating upper connecting pin, on the connecting plate is larger than that of the upper connecting pin.

The track is formed by arranging a plurality of track units in a left-right direction in a line shape from head to tail, the track units are in a door shape and comprise guide plates, a left connecting plate and a right connecting plate which are fixed at the left end and the right end of each guide plate and support the guide plates, a plurality of track seats are fixed at the rear side of a chute of the scraper conveyor, the track seats are arranged at intervals in the left-right direction, track slots which are used for the left connecting plate and/or the right connecting plate to be inserted and connected are vertically communicated are arranged in the middle of each track seat, the right connecting plate of the left track unit and the left connecting plate of the right track unit in two adjacent track units are inserted into the same track slot, the left connecting plate and the right connecting plate are in clearance fit with the track slots in the front-back direction, and the clearances between the left connecting plate and the right connecting plate and between the track, the left connecting plate and the right connecting plate respectively and the track seat between wear to establish the track round pin spacing jointly through the fore-and-aft direction, it is spacing to wear to establish the bolt jointly through vertical direction between track seat and the track round pin, the chain cell body is fixed the rear side of track seat, the laminating around the two, and binding face department passes through the locating pin location.

The track seat is provided with a track pin hole which is through from front to back, the track pin hole is preferably provided with a waist-shaped hole with a left width and a right width which are larger than an upper width and a lower width, the left connecting plate and the right connecting plate are respectively provided with a positioning pin hole, the positioning pin holes are round holes or waist-shaped holes, and the track pin is matched with the track pin hole and the positioning pin holes simultaneously.

The chain groove body extends leftwards and rightwards, the chain groove extends leftwards and rightwards and is arranged on the upper portion of the chain groove body, and pushing grooves, pin hole grooves and material leakage discharge grooves which are communicated front and back can be arranged on the lower portion of the chain groove body in the left-right direction at intervals.

The chain groove body can be set to be a split structure of the chain groove base and the chain groove dismounting plate, the chain groove dismounting plate can be detachably fixed above the front of the chain groove base, the chain groove dismounting plate and the chain groove base enclose a complete chain groove, the chain groove dismounting plate is used for forming a quarter boundary above the front of the chain groove, and a quarter below the front of the chain groove is open.

The guide traction system of the short-span thin coal seam mining machine can be further provided with a support sliding shoe, the support sliding shoe is preferably arranged in the front-rear middle part of the machine body and supports the machine body from the lower part, the upper part of the support sliding shoe is hinged to the machine body, the hinged axis extends forwards and backwards, and the bottom of the support sliding shoe is provided with a front support surface and a rear support surface which are respectively a second support surface and a first support surface.

The first supporting surface is higher than the second supporting surface, and the first supporting surface and the second supporting surface are both provided with wear-resistant layers.

The utility model has the advantages that:

the utility model discloses a mode that independent and the guider that can dismantle separately and draw gear combined together lets it undertake direction and traction respectively. The traction chain is hinged with the machine body at a plurality of positions and has certain flexibility in the front, back, up and down directions, so that the guide device bears cutting reaction force of the coal mining machine, and the traction connecting device only bears traction force in the left and right directions, so that abrasion at the chain groove can be greatly reduced, and the service life of the traction device is greatly prolonged. This advantage is all the more evident the greater the power and tractive effort of the shearer.

The waist-shaped hole design of the rail pin hole can ensure that the rail unit keeps a floating connection state relative to the rail seat. When the chute of the conveyor is bent horizontally or vertically, the relative positions of the rail slots of different rail seats can be changed, the rail units can correspondingly float along with the mutual front-back, up-down, left-right displacement between the chutes, and the rail units are not subjected to additional force to continuously maintain the effective connection with the rail seats and the normal contact and matching with the guide sliding shoes, so that the normal guide function is continuously exerted.

Gaps between the left connecting plate and the right connecting plate of the track unit and gaps between the left connecting plate and the right connecting plate and the track slot are all filled by precompression of high elastic bodies, so that coal dust, mineral aggregate and the like can be effectively prevented from entering the gaps, and the floating amplitude reduction or floating failure of the track unit relative to the track seat caused by the fact that the gaps are gradually filled by hard objects is prevented.

The utility model discloses a have the support piston shoes of two holding surfaces, not only the contact surface is the increase at double, and the second holding surface can remove the support position to the coal wall direction moreover, has improved the stability of hanging the fuselage coal-winning machine greatly.

The surfaces of the guide sliding shoes and the surfaces of the guide sliding shoes matched with the rails are subjected to special wear-resistant treatment and are parts convenient to replace, and once the guide sliding shoes are worn to a certain degree, the guide sliding shoes can be replaced and can be replaced independently, the service life of related equipment such as a scraper conveyor and the like cannot be influenced, so that the use and maintenance cost is obviously reduced, and the reliability of the whole working efficiency and the equipment operation is greatly improved.

Drawings

Fig. 1 is a schematic side view of an embodiment of the present invention;

FIG. 2 is a top view of the scraper conveyor of FIG. 1;

FIG. 3 is a front view of the guided traction system of FIG. 1;

FIG. 4 is a cross-sectional view A1-A1 of FIG. 1 (front view of the chain channel body);

FIG. 5 is a cross-sectional view A2-A2 (cross-sectional view of the chain channel body) of FIG. 1;

FIG. 6 is a sectional view A3-A3 of FIG. 1 (a front view of the track unit and the track base);

FIG. 7 is a cross-sectional view A4-A4 (cross-sectional view of the track unit and the track base) of FIG. 1;

FIG. 8 is a sectional view B1-B1 of FIG. 2 (rear coupling group sectional view);

FIG. 9 is a cross-sectional view B2-B2 (cross-sectional view of the rail seat) of FIG. 2;

FIG. 10 is a sectional view (sliding seat sectional view) taken along line B3-B3 of FIG. 2;

FIG. 11 is a cross-sectional view (horizontal cross-sectional view of a scraper conveyor pan) at C1-C1 of FIG. 1;

FIG. 12 is a front view of one embodiment of a rail unit;

FIG. 13 is a cross-sectional view of one embodiment of a guide;

FIG. 14 is a cross-sectional view of one embodiment of a hitch coupler;

FIG. 15 is a schematic structural view of one embodiment of the support shoe.

Reference numerals:

1. a coal mining machine;

11. a guide device; 111. a guide shoe; 1111. a lower guide surface; 1112. a front guide surface; 1113. an upper guide surface; 1114. a rear guide surface; 112. a pivot pin;

12. a traction coupling device; 121. a connecting plate; 122. an upper connecting pin; 123. a lower connecting pin; 124. a connecting hook; 125. a chain connecting pin; 126. a drag chain; 13. supporting the slipper; 131. a double ear seat; 134. a first wear resistant layer; 135. a second wear layer;

2. a scraper conveyor;

21. a trough body; 211. a rail seat; 2111. a track slot; 2112. a track pin hole; 2113. a side groove; 212. a pushing seat; 2121. a push seat main board; 2122. a push seat subplate; 2123. a pushing seat sealing plate; 214. a rear connecting groove;

22. a track; 221. a track unit; 2211. a guide plate; 2212. a left connecting plate; 2213. a right connecting plate; 2214. a positioning pin hole; 2215. a lower friction surface; 2216. a front friction surface; 2217. an upper friction surface; 2218. a rear friction surface; 222. a track pin; 223. a high elastomer; 224. a bolt;

231. a chain trough body; 2311. a chain groove; 2312. a pushing groove; 2313. a pin hole slot; 2314. a leakage discharge groove; 232. positioning pins; 233. a chain slot fastener; 234. a chain groove dismounting plate;

241. a cable trough; 242. a cable trough fastener;

25. a front connection group;

26. a rear connection group; 261. a rear connecting pin; 262. a stop pin; 263. and (7) a cover plate.

Detailed Description

The utility model discloses a direction traction system (can be referred to as simply direction traction system) of short span thin seam coal-winning machine, as shown in fig. 1-15, including guider 11, draw connecting device 12 and scraper conveyor 2. The guide device comprises a guide sliding shoe 111 and a track 22, the track is linearly laid in a groove of the scraper conveyor along the left-right direction of a coal wall, and the track 22 is formed by sequentially arranging a plurality of track units 221 in a left-right direction in a line shape from head to tail. The guide shoes are detachably mounted near the rear of the body of the coal mining machine 1 and support the body from below. The guide sliding shoes straddle the track through the guide grooves and are connected with the track in a left-right sliding mode, the guide sliding shoes balance the gravity of a part of the machine body, bear cutting reaction force and have a guide function along the track. The traction connecting device 12 comprises a connecting plate 121, a connecting hook 124, a chain groove 231 and a traction chain 126, wherein one end of the connecting plate is hinged to the machine body, the other end of the connecting plate is hinged to one end of the connecting hook, and the hinged axes of the two positions extend leftwards and rightwards. The other end of the connecting hook is arranged to be a cylindrical structure with the axis extending left and right, the connecting hook is conveniently arranged in a chain groove 2311 on the chain groove body along with a traction chain and is in sliding connection with the chain groove body, the traction chain is connected to the cylindrical structure, and particularly, two ends of the cylindrical structure are respectively connected with one traction chain. The track and the chain groove body can be detachably arranged on the groove body 21 of the scraper conveyor. Traction force in the left and right directions is applied to the traction chain, and the coal mining machine can be driven to move left and right. The utility model discloses a separately independent and guider that can dismantle cooperatees with traction connection device, lets it undertake direction and traction respectively. The traction chain and the machine body are connected in a hinged mode through a plurality of positions, and certain flexibility is achieved in the front, rear, up and down directions, so that the cutting reaction force of the coal mining machine is borne by the guide device 11, and the traction connecting device 12 only bears traction force in the left and right directions, so that the upper, rear, front and rear side forces possibly borne by the chain grooves 2311 are small, abrasion is greatly reduced, and the service life of the traction connecting device 12 is greatly prolonged. And moreover, the guide device and the traction connecting device can be independently replaced after being worn, the service life of the scraper conveyor cannot be influenced, and the use and maintenance cost is obviously reduced. The larger the power and traction of the coal mining machine, the more obvious the above advantages of the mobile system of the present invention are.

The upper part of the guide sliding shoe is hinged with the machine body through a rotary pin 112, the hinge axis extends forwards and backwards, and the guide sliding shoe can swing in a vertical plane extending leftwards and rightwards around the rotary pin so as to adapt to the fluctuation change of a bottom plate of a working surface. Furthermore, the pin hole penetrating through the rotating pin on the guide sliding shoe is preferably a kidney-shaped hole with the left-right width larger than the upper-lower width, and the front side surface and the rear side surface of the guide sliding shoe are preferably smooth transition surfaces with the middle part close to the outside and the left-right ends close to the inside, so that the guide sliding shoe can deflect in a certain degree in the horizontal plane to adapt to the horizontal bending of the bottom plate of the working face. The term "outer" as used herein refers to the front and rear directions with respect to the front and rear sides, respectively. In this embodiment, the left and right portions of the front and rear side surfaces of the guide shoe are both provided as vertical inclined surfaces. The guide sliding shoes 111 capable of swinging horizontally and vertically ensure that the coal mining machine is guided along the track of the chute of the scraper conveyor which changes back and forth along with the fluctuation of the bottom plate, and the guide device bears the back-and-forth up-and-down counter force generated by the mineral aggregate cut by the coal mining machine, so that the coal mining machine can be stabilized.

The cross section of the guide groove is L-shaped, and one end of the L-shaped guide groove is a downward notch of the guide groove. Four sides of the region where the other end of the L-shaped structure is located are all in guiding fit relation with the rail, the upper guide surface 1113, the lower guide surface 1111, the front guide surface 1112 and the rear guide surface 1114 of the guide groove are respectively arranged on the upper front surface, the lower front surface and the rear surface of the region, and each guide surface is provided with a wear-resistant layer.

The rail unit is gate-shaped and includes a guide plate 2211 horizontally installed, and a left connection plate 2212 and a right connection plate 2213 fixed to left and right ends of the guide plate and supporting the guide plate. A plurality of rail seats 211 are fixed on the rear side of the chute of the scraper conveyor and provide a foundation for the installation, fixation and floating of the rails. The rail bases are arranged at intervals in the left-right direction. And the middle part of the track seat is provided with a track slot 2111 which is used for inserting the left connecting plate and/or the right connecting plate and runs through up and down and is used for inserting the left connecting plate and the right connecting plate of the track unit. And side grooves 2113 are further formed in the lower parts of the left side and/or the right side of the rail seat, so that the pulverized coal gangue can be discharged conveniently. The right connecting plate of the left track unit and the left connecting plate of the right track unit in the two adjacent track units are inserted into the same track slot, the left connecting plate and the right connecting plate are in clearance fit with the track slot in the front-back direction, and gaps between the left connecting plate and the right connecting plate and between the left connecting plate and the track slot (mainly gaps in the left-right direction) are all pre-compressed and filled by high-elasticity bodies 223 (such as high-elasticity sponge), so that coal dust and the like are prevented from entering the gaps, the gaps are constantly filled along with the relative position change of the track and the chute, and the leakage is reliable.

The rail seat is provided with a rail pin hole 2112 which is through from front to back and used for inserting the rail pin 222 and limiting the rail unit and the rail seat. The track pin hole preferably adopts a waist-shaped hole with the left-right width larger than the upper-lower width. And the left connecting plate and the right connecting plate are both provided with positioning pin holes 2214 for being matched with the pin holes of the track pins 222. The positioning pin hole can be a round hole or a waist-shaped hole. The track pin is simultaneously matched with the track pin hole and the positioning pin hole to realize floating connection. The track seat and the track pin can be limited by a bolt 224 which is arranged in the vertical direction in a penetrating way. The waist-shaped hole design of the rail pin hole enables the rail unit to keep a floating connection state relative to the rail seat. When the conveyor chute is bent horizontally or vertically, the relative position between the rail insertion grooves 2111 of different rail seats can be changed, the rail unit 221 can correspondingly float along with the mutual front-back, up-down, left-right displacement between the chutes, and the rail unit can continuously maintain the effective connection with the rail seats and the normal contact and matching with the guide sliding shoes without additional force, so that the normal guide function can be continuously exerted.

The chain groove body 231 is fixed on the rear side of the track seat through a chain groove fastener 233, the chain groove body and the track seat are attached front and back, and the attaching surface is positioned through a positioning pin 232.

The front-back width of the guide plate is larger than that of the left connecting plate and the right connecting plate, the front side surface of the guide plate exceeds the front side surface of the left connecting plate and the front side surface of the right connecting plate, the front side surface, the back side surface and the top surface of the guide plate and the bottom surface of the guide plate which exceeds the left connecting plate and the right connecting plate forwards are surfaces matched with the guide groove, namely a front friction surface 2216, a back friction surface 2218, an upper friction surface 2217 and a lower friction surface 2215 which are respectively in contact with a front guide surface 1112, a back guide surface 1114, an upper guide surface 1113 and a lower guide surface 1111 of the.

The surfaces of the guide sliding shoes and the surfaces of the guide sliding shoes matched with the rails are subjected to special wear-resistant treatment and are resistant to wear, the guide sliding shoes and the rails are detachable and convenient to replace parts, and once the guide sliding shoes and the rails are worn to a certain degree, the guide sliding shoes and the rails can be replaced, so that the whole working efficiency and the reliability of equipment operation can be greatly improved.

With regard to the traction connecting device 12, one end of the connecting plate 121 is hinged to the body by passing a connecting pin 122. The diameter of a pin hole used for penetrating the upper connecting pin on the connecting plate is larger than that of the upper connecting pin so as to keep the connecting plate floating relative to the machine body and prevent the connecting plate from being stressed in the front-back up-down direction. The other end of the connecting plate is hinged with one end of a connecting hook 124 through a lower connecting pin 123. The left end and the right end of the cylinder structure are respectively provided with a connecting groove, the left connecting groove and the right connecting groove are through grooves, the openings face to the left direction and the right direction respectively, and the cylinder structure and the drag chain are connected by a chain connecting pin 125 penetrating through the groove walls on the two sides of the connecting grooves and a chain ring of the drag chain 126 positioned in the connecting grooves. The traction chain is flexibly connected with the connecting hook, traction force applied by the traction chain is transmitted to the machine body through the connecting hook and the connecting plate, the coal mining machine is dragged along the left and right direction, and cutting reaction force cannot be transmitted to the traction chain and the chain groove.

The chain groove 231 extends left and right, the chain groove 2311 extends left and right and is arranged on the upper portion of the chain groove, pushing grooves 2312, pin hole grooves 2313 and material leakage discharge grooves 2314 which are communicated with each other front and back are arranged on the lower portion of the chain groove in the left and right direction at intervals, the pushing grooves reserve space for arranging pushing seats, the pin hole grooves reserve operation space for installing the rail pins 222, and the material leakage discharge grooves are used as discharge channels of material leakage.

The chain groove body is arranged to be a split structure of the chain groove base and the chain groove dismounting plate 234, the chain groove dismounting plate can be detachably fixed to the front upper portion of the chain groove base, the chain groove dismounting plate and the chain groove base form a complete chain groove in a surrounding mode, and the chain groove dismounting plate is used for forming a quarter boundary of the front upper portion of the chain groove. The quarter of the front lower part of the chain groove is open, and the connecting hook connects the inside and the outside of the chain groove through the opening. After the chain groove dismounting plate is dismounted, the notch of the front half circumference on the chain groove base is exposed, so that the traction chain can be conveniently and directly taken and placed, and the dismounting and maintenance of the traction chain are facilitated.

In addition, the guide traction system of the short-span thin seam shearer may further include a support slipper 13, which is preferably installed at a middle and forward portion in the front-rear direction of the body and supports the body from below. The support shoes are primarily used to support the weight of the fuselage.

The upper part of the supporting skid shoe is hinged on the machine body, and the hinge axis extends forwards and backwards. In this embodiment, the upper portion of the supporting sliding shoe is provided with a double-lug ear seat 131, a hinge seat is generally arranged at a corresponding position of the lower portion of the body, a seat hole of the hinge seat extends in the front-back direction, and the supporting sliding shoe is hinged to the hinge seat through a pin shaft.

The bottom of the supporting skid shoe is provided with a front supporting surface and a rear supporting surface which are respectively a second supporting surface and a first supporting surface. When the coal face support device is used, the first support surface is supported on a shovel plate of the scraper conveyor, and the second support surface is supported on a bottom plate of the coal face. Compared with the existing supporting sliding shoe with only one supporting surface for supporting on the shovel plate, the supporting sliding shoe has the advantages that the contact area is increased, the specific pressure is reduced, the service life of the supporting sliding shoe is prolonged, and in addition, the supporting position can be moved to the coal wall side due to the fact that the second supporting surface is arranged, and therefore the stability of the thin coal seam coal mining machine adopting a machine body suspending mode can be greatly improved.

In order to accommodate the difference in height between the blade and the base plate, the first support surface is higher than the second support surface. The first and second bearing surfaces are provided with a first wear layer 134 and a second wear layer 135, respectively.

One set of coal mining machine is provided with the guide sliding shoes 111 and the support sliding shoes 13 which are arranged on the left and right sides respectively, so that the stability of the coal mining machine can be better ensured.

A pushing seat 212 is further fixed behind the chute and provides connection for a pushing device behind the chute. The sliding seat comprises a sliding seat main plate 2121, a sliding seat auxiliary plate 2122 and a sliding seat sealing plate 2123. The left side and the right side of the pushing seat main board are respectively provided with the pushing seat auxiliary board, the pushing seat main board and the pushing seat auxiliary board are main skeleton structures of the pushing seat and are used for providing pushing strength, and the pushing seat sealing board covers the upper portion of the pushing seat main board and can prevent coal powder from leaking downwards. The front end of the pushing seat forwards penetrates through the pushing groove and is in contact with the rear side face of the chute.

And a cable groove 241 is fixed at the rear part of the chain groove body and provides an accommodating channel for cables of the coal mining machine in the left and right moving process of the coal mining machine. The cable trough is secured to the chain trough body by cable trough fasteners 242.

The chute is composed of a plurality of sections which are connected left and right, and the sections are respectively connected with the rear connecting group 26 through the front connecting group 25 at the front part and the rear part. The rear connection group, for example, includes a rear connection pin 261, a stopper pin 262, and a cover plate 263. The rear connecting pin is a dumbbell pin, two ends of the dumbbell pin are respectively arranged in the rear connecting grooves 214 at the end parts of the two sections of chutes close to each other, and the rear connecting pin is prevented from falling off from the rear through the vertically arranged stop pins 262 fixed on the chutes and positioned behind the rear connecting pin. The front connecting group 25 and the rear connecting group 26 are used for limiting horizontal bending and vertical bending between two adjacent chutes while connecting the two chutes, so that the groove body of the scraper conveyor has adaptability to horizontal bending and vertical bending of complex geological conditions, and meanwhile, the groove body is convenient to disassemble, assemble and replace.

The front-rear direction referred to herein corresponds to the left-right direction of fig. 1, respectively.

Claims (10)

1. The utility model provides a direction traction system of short span thin seam coal-winning machine which characterized in that: the coal mining machine comprises a guide device, a traction connecting device and a scraper conveyor, wherein the guide device comprises a guide sliding shoe and a track, the track is formed by arranging a plurality of track units in a line shape in the left and right directions in an end-to-end sequence, the guide sliding shoe is detachably mounted at the back of a machine body of the coal mining machine and supports the machine body from the lower part, the guide sliding shoe straddles on the track through a guide groove of the guide sliding shoe and is in sliding connection with the track in the left and right directions, the traction connecting device comprises a connecting plate, a connecting hook, a chain groove body and a traction chain, one end of the connecting plate is hinged on the machine body, the other end of the connecting plate is hinged with one end of the connecting hook, hinged axes of the two parts are extended in the left and right directions, the other end of the connecting hook is arranged into a cylinder structure with the axes extended in the left and right directions, the cylinder, the drag chain is connected to the cylinder structure, and both the track and the chain groove body can be detachably mounted on the groove body of the scraper conveyor.

2. The guided haulage system of a short span thin seam shearer of claim 1, wherein: the upper portion of the guide sliding shoe is hinged to the machine body through a rotary pin in a penetrating mode, the hinge axis extends forwards and backwards, gaps are reserved between the guide sliding shoe and the machine body in the vertical and front-back directions, a pin hole formed in the guide sliding shoe in a penetrating mode and provided with the rotary pin is a waist-shaped hole, the left width and the right width of the pin hole are larger than the upper width and the lower width of the pin hole, and the front side face and the rear side face of the guide sliding shoe are smooth transition surfaces, wherein the middle portion of the front side face and the.

3. The guided haulage system of a short span thin seam shearer of claim 2, wherein: one end of the connecting plate is hinged to the machine body through the penetrating connecting pin, and the diameter of a pin hole in the connecting plate, through which the connecting pin penetrates, is larger than that of the upper connecting pin.

4. The guided traction system of a short span thin seam shearer of claim 3, wherein: the track unit is door-shaped and comprises a guide plate, a left connecting plate and a right connecting plate which are fixed at the left end and the right end of the guide plate and support the guide plate, a plurality of track seats are fixed at the rear side of a chute of the scraper conveyor, the left connecting plate and the right connecting plate are arranged at intervals in the left-right direction of each track seat, a track slot which is used for the insertion connection of the left connecting plate and/or the right connecting plate and runs through up and down is arranged in the middle of each track seat, the right connecting plate of the left track unit and the left connecting plate of the right track unit in two adjacent track units are inserted into the same track slot, the left connecting plate and the right connecting plate are in clearance fit with the track slot in the front-back direction, the clearances between the left connecting plate and the right connecting plate and between the left connecting plate and the track slot respectively are all filled by precompression of a high, the track seat and the track pin are mutually penetrated and provided with a bolt in a vertical direction for limiting, the chain groove body is fixed at the rear side of the track seat, the track seat and the track pin are attached front and back, and the attaching surface is positioned through a positioning pin.

5. The guided haulage system of a short span thin seam shearer of claim 4, wherein: the track base is provided with a track pin hole which is through from front to back, the track pin hole adopts a waist-shaped hole with a left width and a right width larger than an upper width and a lower width, the left connecting plate and the right connecting plate are respectively provided with a positioning pin hole, the positioning pin holes are round holes or waist-shaped holes, and the track pin is matched with the track pin hole and the positioning pin holes simultaneously.

6. The guided haulage system of a short span thin seam shearer of claim 5, wherein: the chain groove body extends leftwards and rightwards, the chain groove extends leftwards and rightwards and is arranged on the upper portion of the chain groove body, and pushing grooves, pin hole grooves and material leakage discharge grooves which are communicated in the front and back direction are arranged on the lower portion of the chain groove body in the left and right direction at intervals.

7. The guided haulage system of a short span thin seam shearer of claim 6, wherein: the chain groove body is set to be a split structure of the chain groove base and the chain groove dismounting plate, the chain groove dismounting plate can be detachably fixed above the front of the chain groove base, the chain groove and the chain groove base enclose a complete chain groove, the chain groove dismounting plate is used for forming a quarter boundary above the front of the chain groove, and a quarter below the front of the chain groove is open.

8. The guided haulage system of a short span thin seam shearer of claim 5, wherein: the chute of the scraper conveyor is composed of a plurality of sections, and the front part and the rear part of each two adjacent sections are respectively connected through a front dumbbell pin and a rear dumbbell pin.

9. The guided traction system of a short-span thin seam mining machine according to claim 1, 2, 3, 4, 5, 6, 7 or 8, characterized in that: the supporting skid shoe is arranged in the front-rear middle part of the machine body and supports the machine body from the lower part, the upper part of the supporting skid shoe is hinged on the machine body, the hinge axis extends forwards and backwards, and the bottom of the supporting skid shoe is provided with a front supporting surface and a rear supporting surface which are respectively a second supporting surface and a first supporting surface.

10. The guided haulage system of a short span thin seam shearer of claim 9, wherein: the first supporting surface is higher than the second supporting surface, and the first supporting surface and the second supporting surface are both provided with wear-resistant layers.

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