阅读说明：本技术 一种利用重力转化可自动安装支撑设备的挖煤车 (Coal mining vehicle capable of automatically installing supporting equipment by utilizing gravity conversion ) 是由 鹿昊 于 2021-01-06 设计创作，主要内容包括：本发明涉及煤矿设备领域,公开了一种利用重力转化可自动安装支撑设备的挖煤车,包括主体箱,主体箱内设有开口向上的支撑板腔,支撑板腔下侧连通设有推板齿条腔,推板齿条腔右侧设有推板齿轮腔,推板齿轮腔右侧且位于主体箱内固定连接有电机,电机左端面固定连接有向左延伸至推板齿轮腔内的主动力轴,本装置可以通过对支撑板进行支撑可以使支撑板在重力的作用下自动进行展开和深入固定,从而达到对容易塌方的煤矿部分进行固定支撑工作,实现了全自动化支撑煤矿隧道的工作,减少了人力操作,提高了挖掘煤矿的工作效率,同时节约支撑的成本同时保证了工作人员的生命财产安全。(The invention relates to the field of coal mine equipment, and discloses a coal mining vehicle capable of automatically mounting supporting equipment by utilizing gravity conversion, which comprises a main body box, wherein a supporting plate cavity with an upward opening is arranged in the main body box, a pushing plate rack cavity is communicated and arranged at the lower side of the supporting plate cavity, a pushing plate gear cavity is arranged at the right side of the pushing plate rack cavity, a motor is fixedly connected to the right side of the pushing plate gear cavity and positioned in the main body box, a driving power shaft extending leftwards into the pushing plate gear cavity is fixedly connected to the left end surface of the motor, the device can automatically unfold and deeply fix a supporting plate under the action of gravity by supporting the supporting plate, therefore, the coal mine part which is easy to collapse is fixedly supported, the full-automatic coal mine tunnel supporting work is realized, the manual operation is reduced, the coal mine excavating work efficiency is improved, the supporting cost is saved, and the life and property safety of workers is guaranteed.)

1. The utility model provides an utilize coal mining car of gravity transformation but automatic installation support equipment, includes the main part case, its characterized in that: the main box is internally provided with a supporting plate cavity with an upward opening, the lower side of the supporting plate cavity is communicated with a push plate rack cavity, the right side of the push plate rack cavity is provided with a push plate gear cavity, the right side of the push plate gear cavity is fixedly connected with a motor positioned in the main box, the left end surface of the motor is fixedly connected with a main power shaft which extends leftwards into the push plate gear cavity, the left end of the main power shaft is fixedly connected with a push plate one-way bearing, the outer side of the push plate one-way bearing 18 is fixedly connected with a push plate driving gear, the left end wall of the push plate gear cavity is positioned in the upper side of the main power shaft and is in running fit connection with a push plate gear shaft which extends rightwards into the push plate gear cavity and leftwards into the push plate rack cavity, the right end of the push plate gear shaft is fixedly, a push plate reset spring is fixedly connected between the right end surface of the push plate gear shaft and the right end wall of the push plate gear cavity, a push plate rack which extends upwards into the support plate cavity is connected in the push plate rack cavity in a sliding fit manner and is positioned behind the push plate gear, a push plate rack spring which is meshed with the push plate gear is fixedly connected between the lower end surface of the push plate rack and the lower end wall of the push plate rack cavity, a push plate is fixedly connected at the tail end of the upper side of the push plate rack, a support plate is connected in the support plate cavity in a sliding fit manner, two extension plate cavities which are bilaterally symmetrical about the center of the support plate and are provided with a left opening and a right opening are arranged in the support plate, an extension plate is connected in the extension plate cavity in a sliding fit manner, an extension plate rack is fixedly connected, the extension board cavity is located on the outermost side and is symmetrically communicated with extension board gear cavities in the supporting plate, the front end wall of the extension board gear cavity is connected with an extension board gear shaft which extends backwards and penetrates through the extension board gear cavity in a rotating fit mode, the extension board gear shaft is fixedly connected with an extension board gear which is located in the extension board gear cavity and is meshed with an extension board gear rack, and the innermost side of the extension board is provided with a limiting block through cavity with a downward opening.

2. The coal mining vehicle capable of automatically installing the supporting equipment by utilizing gravity transformation as claimed in claim 1, wherein: the outermost side of the extension plate cavity is communicated with a stopper cavity with an upward opening, a stopper which can extend into the stopper through cavity is connected in a sliding fit manner in the stopper cavity, a stopper spring is fixedly connected between the lower end face of the stopper and the lower end wall of the stopper cavity, downward opening support rod cavities are symmetrically arranged around the inside of the support plate, the front end wall of each support rod cavity is connected with a ground digging rod rotating shaft which extends backwards and penetrates through the inside of the support rod cavity in a rotating fit manner, the ground digging rod rotating shaft at the left rear side is fixedly connected with a wire wheel one-way bearing positioned in the support rod cavity, the rest three support rod cavities and the outer side of the wire wheel one-way bearing are fixedly connected with support rods, the rear side at the left rear side is provided with a wire wheel cavity, the ground digging rod rotating shaft at the left rear side extends into the wire wheel cavity axially, and, and a wire wheel reset spring is fixedly connected between the rear end surface of the rotating shaft of the ground digging rod at the left rear part and the rear end wall of the wire wheel cavity.

3. The coal mining vehicle capable of automatically installing the supporting equipment by utilizing gravity transformation as claimed in claim 2, wherein: be equipped with the inside ground screw thread chamber of digging of opening in the bracing piece, dig ground screw thread chamber right side and be located be equipped with the opening in the bracing piece and dig ground driven wheel chamber downwards, dig ground driven wheel intracavity end wall normal running fit be connected to extend outwards dig ground driven wheel intracavity and inwards extend to dig the ground screw thread intracavity dig the axis of rotation, dig the axis of rotation go up spline fit be connected to extend inwards to the bracing piece intracavity and with dig the ground fixed axle that ground screw thread chamber screw thread fit is connected, dig the terminal fixedly connected with of ground fixed axle inboard and dig the piece, the place ahead two the bracing piece chamber front side is equipped with and also is located extend board gear chamber front side and dig the wheel chamber, the place ahead two dig ground pole axis of rotation extend forward to dig ground belt wheel intracavity, the place ahead two dig ground pole axis of rotation front side end fixedly connected with dig ground driven belt pulley, the extension plate gear shaft extends forwards into the cavity of the ground planing belt wheel, the tail end of the front side of the extension plate gear shaft is fixedly connected with an extension driven gear, and an extension power belt is connected between the extension driven gear and the ground planing driven belt wheel in a power matching mode.

4. The coal mining vehicle capable of automatically installing the supporting equipment by utilizing gravity transformation as claimed in claim 2, wherein: the inner side of the supporting rod cavity is provided with a friction block cavity, the ground digging rod rotating shaft extends inwards into the friction block cavity, the friction block cavity is positioned in the friction block cavity and connected with a friction block abutted against the ground digging rod rotating shaft in a sliding fit manner, a friction block spring is fixedly connected between the lower end surface of the friction block and the lower end wall of the friction block cavity, the upper side of the extending plate cavity is positioned in the supporting plate and is internally provided with an extrusion block cavity with an upward opening, an extrusion block is connected in the extrusion block cavity in a sliding fit manner, an extrusion block spring is fixedly connected between the lower end surface of the extrusion block and the lower end wall of the extrusion block cavity, the front end wall of the extrusion block cavity is positioned in the lower side of the extrusion block and is fixedly connected with a motor closing switch, a small magnet is fixedly connected in the extrusion block, the rear side of the extrusion block cavity is communicated with a large magnet cavity, and a friction block pull rope is fixedly connected between the rear end face of the large magnet and the lower end face of the friction block.

5. The coal mining vehicle capable of automatically installing the supporting equipment by utilizing gravity transformation as claimed in claim 2, wherein: the utility model discloses a ground transmission accessory wheel, including a bracing piece, a ground driving wheel cavity, a ground belt cavity, a ground driving wheel cavity upper end rotation fit connection downwardly extending to dig ground driving wheel cavity and upwards extend to dig the ground transmission shaft of ground belt cavity, dig the terminal fixedly connected with of ground transmission shaft downside can with dig the ground driven gear that ground driven gear meshed, dig the terminal fixedly connected with of ground transmission shaft upside and dig ground driven gear axle, four dig power fit between the ground driven gear axle and be connected with dig ground power belt, the place left side place ahead dig ground belt cavity upside and be located dig ground transmission cavity of extension board cavity downside, the place left side place ahead dig ground transmission shaft upwards extend to dig ground transmission cavity, place left side place ahead dig ground transmission shaft upside end fixedly connected with dig ground transmission accessory wheel, dig ground transmission chamber downside and be equipped with the meshing gear chamber, meshing gear chamber downside intercommunication is equipped with microscler rack chamber.

6. The coal mining vehicle capable of automatically installing the supporting equipment by utilizing gravity transformation as claimed in claim 5, wherein: the tail end of the upper side of the meshing gear cavity is fixedly connected with a land digging wheel shaft which extends upwards into the land digging transmission cavity and extends downwards into the meshing gear cavity, the tail end of the upper side of the land digging wheel shaft is fixedly connected with a land digging transmission belt wheel, a land digging power belt is connected between the land digging transmission belt wheel and the land digging transmission auxiliary wheel in a power fit manner, the tail end of the lower side of the land digging wheel shaft is fixedly connected with a meshing one-way bearing, the outer side of the meshing one-way bearing is fixedly connected with a meshing bevel gear, the left end wall of the meshing gear cavity is rotationally and fittingly connected with a meshing gear shaft which extends through the meshing gear cavity rightwards, a meshing gear which is positioned in the meshing gear cavity is fixedly connected onto the meshing gear shaft, a long rack which is meshed with the meshing gear is connected into the long rack cavity in a sliding fit manner, and a long rack spring, and a long rack pull rope is fixedly connected between the rear end face of the long rack and the wire wheel.

Technical Field

The invention relates to the field of coal mine equipment, in particular to a coal digging vehicle capable of automatically mounting supporting equipment by utilizing gravity conversion.

Background

At present, the protective measures for the coal mine tunnel in the excavation working process of the coal mine are relatively few, no better supporting device is provided for well guaranteeing the life safety of workers, a large amount of manual operation is needed for partially supporting and protecting the device for the coal mine tunnel, the automation degree of the excavation supporting device for the coal mine is not high, the efficiency of excavating the coal mine is greatly reduced, and the cost of the partially supporting device is high.

Disclosure of Invention

The invention aims to provide a coal digging vehicle capable of automatically installing supporting equipment by utilizing gravity conversion, which can overcome the defects in the prior art, thereby improving the practicability of the equipment.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a coal mining vehicle capable of automatically installing supporting equipment by utilizing gravity conversion, which comprises a main body box, wherein a supporting plate cavity with an upward opening is arranged in the main body box, a pushing plate rack cavity is communicated and arranged on the lower side of the supporting plate cavity, a pushing plate gear cavity is arranged on the right side of the pushing plate rack cavity, a motor is fixedly connected to the right side of the pushing plate gear cavity and positioned in the main body box, the left end surface of the motor is fixedly connected with a main power shaft extending leftwards into the pushing plate gear cavity, the left end of the main power shaft is fixedly connected with a pushing plate one-way bearing, the outer side of the pushing plate one-way bearing is fixedly connected with a pushing plate driving gear, the left end wall of the pushing plate gear cavity and positioned on the upper side of the main power shaft are rotatably matched and connected with a pushing plate gear shaft extending rightwards into the pushing plate gear cavity and extending leftwards into, the tail end of the left side of the push plate gear shaft is fixedly connected with a push plate gear, a push plate reset spring is fixedly connected between the right end surface of the push plate gear shaft and the right end wall of the push plate gear cavity, a push plate rack which extends upwards into the supporting plate cavity is connected in a sliding fit manner in the push plate rack cavity and is positioned behind the push plate gear, a push plate rack spring which is meshed with the push plate gear is fixedly connected between the lower end surface of the push plate rack and the lower end wall of the push plate rack cavity, the tail end of the upper side of the push plate rack is fixedly connected with a push plate, a supporting plate is connected in a sliding fit manner in the supporting plate cavity, two extending plate cavities which are bilaterally symmetrical about the center of the supporting plate and are provided with a left opening and a right opening are arranged in the supporting plate, an extending plate is connected in a sliding fit manner in, the extension board cavity is located on the outermost side and is symmetrically communicated with extension board gear cavities in the supporting plate, the front end wall of the extension board gear cavity is connected with an extension board gear shaft which extends backwards and penetrates through the extension board gear cavity in a rotating fit mode, the extension board gear shaft is fixedly connected with an extension board gear which is located in the extension board gear cavity and is meshed with an extension board gear rack, and the innermost side of the extension board is provided with a limiting block through cavity with a downward opening.

On the basis of the technical scheme, the outermost side of the extension plate cavity is communicated with a stopper cavity with an upward opening, a stopper capable of extending into the stopper through cavity is connected in a sliding fit manner in the stopper cavity, a stopper spring is fixedly connected between the lower end face of the stopper and the lower end wall of the stopper cavity, downward-opening support rod cavities are symmetrically arranged around the support plate, a ground digging rod rotating shaft which extends backwards and penetrates through the support rod cavity is connected in the front end wall of the support rod cavity in a rotating fit manner, a wire wheel one-way bearing positioned in the support rod cavity is fixedly connected to the ground digging rod rotating shaft at the left rear side, support rods are fixedly connected to the support rod cavity and the outer side of the wire wheel one-way bearing at the left rear side, a wire wheel cavity is arranged at the left rear side, and the ground digging rod rotating shaft at the left, the rear end of the rear side of the ground digging rod rotating shaft at the left rear side is fixedly connected with a wire wheel, and a wire wheel reset spring is fixedly connected between the rear end face of the ground digging rod rotating shaft at the left rear side and the rear end wall of the wire wheel cavity.

On the basis of the technical scheme, the support rod is internally provided with a ground-planing threaded cavity with an inward opening, the right side of the ground-planing threaded cavity is positioned in the support rod and internally provided with a ground-planing driven wheel cavity with a downward opening, the inner end wall of the ground-planing driven wheel cavity is connected with a ground-planing rotating shaft which extends outwards into the ground-planing driven wheel cavity and extends inwards into the ground-planing threaded cavity in a matched manner, the ground-planing rotating shaft is connected with a ground-planing fixed shaft which extends inwards into the support rod cavity and is connected with the ground-planing threaded cavity in a matched manner in a threaded manner, the tail end of the inner side of the ground-planing fixed shaft is fixedly connected with a ground-planing plate, the front sides of the two support rod cavities in front are provided with ground-planing driven belt wheels which are also positioned on the front sides of the extension plate gear cavities, the front two ground-planing rod rotating shafts extend forwards into the ground-planing belt wheel, the extension plate gear shaft extends forwards into the cavity of the ground planing belt wheel, the tail end of the front side of the extension plate gear shaft is fixedly connected with an extension driven gear, and an extension power belt is connected between the extension driven gear and the ground planing driven belt wheel in a power matching mode.

On the basis of the technical scheme, a friction block cavity is arranged on the inner side of the supporting rod cavity, the ground digging rod rotating shaft extends inwards into the friction block cavity, a friction block which is connected with the ground digging rod rotating shaft in a sliding fit manner and is abutted against the ground digging rod rotating shaft is arranged in the friction block cavity, a friction block spring is fixedly connected between the lower end surface of the friction block and the lower end wall of the friction block cavity, an extrusion block cavity with an upward opening is arranged on the upper side of the extension plate cavity and is arranged in the supporting plate, an extrusion block is connected in the extrusion block cavity in a sliding fit manner, an extrusion block spring is fixedly connected between the lower end surface of the extrusion block and the lower end wall of the extrusion block cavity, a motor closing switch is fixedly connected in the front end wall of the extrusion block cavity and is arranged on the lower side of the extrusion block, a small magnet is fixedly connected in the extrusion block, and, the large magnet cavity is connected with a large magnet in a sliding fit mode, and a friction block pull rope is fixedly connected between the rear end face of the large magnet and the lower end face of the friction block.

On the basis of the technical scheme, the outer side of the supporting rod cavity is communicated with a ground driving wheel cavity, the upper side of the ground driving wheel cavity is provided with a ground belt cavity, the upper end wall of the ground driving wheel cavity is connected with a ground driving wheel cavity in a rotating fit manner, the ground driving wheel cavity extends downwards and upwards extends to a ground driving transmission shaft in the ground belt cavity, the tail end of the lower side of the ground transmission shaft is fixedly connected with a ground driven gear meshed with the ground driven gear, the tail end of the upper side of the ground transmission shaft is fixedly connected with a ground driven gear shaft, four ground power belts are connected between the ground driven gear shafts in a power fit manner, the upper side of the ground belt cavity is provided with a ground transmission cavity positioned on the lower side of the extending plate cavity, the ground transmission shaft extends upwards to the ground transmission cavity, the tail end of the upper side of the ground transmission shaft is fixedly connected with a ground transmission auxiliary wheel in a left front manner, dig ground transmission chamber downside and be equipped with the meshing gear chamber, meshing gear chamber downside intercommunication is equipped with microscler rack chamber.

On the basis of the technical scheme, the tail end of the upper side of the meshing gear cavity is fixedly connected with a land digging wheel shaft which extends upwards into the land digging transmission cavity and extends downwards into the meshing gear cavity, the tail end of the upper side of the land digging wheel shaft is fixedly connected with a land digging transmission belt wheel, a land digging power belt is connected between the land digging transmission belt wheel and the land digging transmission auxiliary wheel in a power fit manner, the tail end of the lower side of the land digging wheel shaft is fixedly connected with a meshing one-way bearing, the outer side of the meshing one-way bearing is fixedly connected with a meshing bevel gear, the left end wall of the meshing gear cavity is rotationally and fittingly connected with a meshing gear shaft which extends through the meshing gear cavity rightwards, the meshing gear shaft is fixedly connected with a meshing gear positioned in the meshing gear cavity, and the elongated rack cavity is connected with a, a long rack spring is fixedly connected between the rear end face of the long rack and the left end wall of the long rack cavity, and a long rack pull rope is fixedly connected between the rear end face of the long rack and the wire wheel.

The invention has the beneficial effects that: this device can make the backup pad expand under the effect of gravity automatically and go deep into fixedly through supporting the backup pad to reach and carry out the fixed stay work to the colliery part of easy collapse, realized the work that the full automatization supported the colliery tunnel, reduced human operation, improved the work efficiency who excavates the colliery, practice thrift the cost of supporting simultaneously and guaranteed staff's the security of the lives and property.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of the overall structure of a coal mining vehicle with gravity transformation and automatic support equipment installation.

Fig. 2 is a schematic view of the structure a-a in fig. 1.

FIG. 3 is a schematic diagram of B-B in FIG. 1.

Detailed Description

The invention will now be described in detail with reference to fig. 1-3, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The coal mining vehicle utilizing gravity conversion and capable of automatically installing the supporting equipment comprises a main body box 10, wherein a supporting plate cavity 38 with an upward opening is arranged in the main body box 10, a pushing plate rack cavity 13 is communicated with the lower side of the supporting plate cavity 38, a pushing plate gear cavity 17 is arranged on the right side of the pushing plate rack cavity 13, a motor 20 is fixedly connected to the right side of the pushing plate gear cavity 17 and positioned in the main body box 10, a main power shaft 19 extending leftwards into the pushing plate gear cavity 17 is fixedly connected to the left end face of the motor 20, a pushing plate one-way bearing 18 is fixedly connected to the left end of the main power shaft 19, a pushing plate driving gear 16 is fixedly connected to the outer side of the pushing plate one-way bearing 18, a pushing plate 21 extending rightwards into the pushing plate gear cavity 17 and leftwards into the pushing plate rack cavity 13 is rotatably matched and connected to the left end wall of the pushing plate gear cavity 17 and positioned on the upper side of the main power shaft, the terminal fixedly connected with in push pedal gear shaft 21 right side and the push pedal driven gear 22 of push pedal driving gear 16 meshing, the terminal fixedly connected with push pedal gear 12 in push pedal gear shaft 21 left side, push pedal gear shaft 21 right-hand member face with fixedly connected with push pedal reset spring 23 between the push pedal gear chamber 17 right-hand member wall, push pedal rack chamber 13 just is located push pedal gear 12 rear side sliding fit is connected with and upwards extends to push pedal rack 15 in backup pad chamber 38, fixedly connected with and push pedal rack spring 14 of push pedal gear 12 meshing between push pedal rack 15 lower extreme wall with push pedal rack chamber 13 lower extreme wall, push pedal rack 15 upside terminal fixedly connected with push pedal 11, sliding fit is connected with backup pad 39 in backup pad chamber 38, be equipped with in the backup pad 39 about backup pad 39 central bilateral symmetry's opening left and right open-ended extension board chamber 37, the extension plate cavity 37 is connected with an extension plate 43 in a sliding fit mode, an extension plate rack 42 is fixedly connected to the upper side of the extension plate 43, an inner end face of the extension plate 43 is fixedly connected with an extension plate spring 36 between the inner end faces of the extension plate cavity 37, the outermost side of the extension plate cavity 37 is located, the support plate 39 is internally symmetrically communicated with the extension plate gear cavity 40 in a symmetrical mode, an extension plate gear shaft 81 which extends backwards and penetrates through the extension plate gear cavity 40 is connected to the front end wall of the extension plate gear cavity 40 in a rotating fit mode, the extension plate gear shaft 81 is fixedly connected with an extension plate gear 41 which is located in the extension plate gear cavity 40 and meshed with the extension plate rack 42, and the innermost side of the extension plate 43 is provided with a limiting block through cavity 82 with a downward opening.

In addition, in one embodiment, the outermost side of the extension plate cavity 37 is communicated with a stopper cavity 78 with an upward opening, the stopper cavity 78 is connected with a stopper 76 capable of extending into the stopper through cavity 82 in a sliding fit manner, a stopper spring 77 is fixedly connected between the lower end surface of the stopper 76 and the lower end wall of the stopper cavity 78, a support rod cavity 83 with a downward opening is symmetrically arranged around the support plate 39, the front end wall of the support rod cavity 83 is connected with a ground planing rod rotating shaft 84 which extends backwards and penetrates through the support rod cavity 83 in a rotating fit manner, the ground planing rod rotating shaft 84 at the left rear side is fixedly connected with a reel one-way bearing 69 positioned in the support rod cavity 83, the rest three support rod cavities 83 and the outer side of the reel one-way bearing 69 are fixedly connected with support rods 31, the rear side of the left rear side 86 is provided with a reel cavity 71, the ground planing rod rotating shaft 84 at the left rear side extends backwards into the reel, the tail end of the rear side of the left rear ground digging rod rotating shaft 84 is fixedly connected with a wire wheel 70, and a wire wheel return spring 72 is fixedly connected between the rear end surface of the left rear ground digging rod rotating shaft 84 and the rear end wall of the wire wheel cavity 71.

In addition, in one embodiment, a ground planing threaded cavity 32 with an inward opening is arranged in the support rod 31, a ground planing driven wheel cavity 30 with a downward opening is arranged in the right side of the ground planing threaded cavity 32 and is located in the support rod 31, a ground planing rotating shaft 33 which extends outwards into the ground planing driven wheel cavity 30 and extends inwards into the ground planing threaded cavity 32 is connected to the inner end wall of the ground planing driven wheel cavity 30 in a rotating fit manner, a ground planing fixing shaft 34 which extends inwards into the support rod cavity 83 and is in threaded fit connection with the ground planing threaded cavity 32 is connected to the ground planing rotating shaft 33 in a spline fit manner, a ground planing sheet 35 is fixedly connected to the inner end of the ground planing fixing shaft 34, a ground planing wheel cavity 53 which is also located in front of the extension plate gear cavity 40 is arranged in front of the front two support rod cavities 83, and two ground planing rod rotating shafts 84 extend forwards into the ground planing wheel cavity 53, the front two ends of the rotation shaft 84 of the ground planing rod are fixedly connected with a ground planing passive pulley 54, the extension plate gear shaft 81 extends forwards into the ground planing pulley cavity 53, the front end of the extension plate gear shaft 81 is fixedly connected with an extension passive gear 80, and an extension power belt 79 is connected between the extension passive gear 80 and the ground planing passive pulley 54 in a power fit manner.

In addition, in one embodiment, a friction block cavity 58 is arranged inside the supporting rod cavity 83, the ground digging rod rotating shaft 84 extends inwards into the friction block cavity 58, a friction block 55 abutted against the ground digging rod rotating shaft 84 is connected inside the friction block cavity 58 and located on the lower side of the ground digging rod rotating shaft 84 in a sliding fit manner, a friction block spring 56 is fixedly connected between the lower end surface of the friction block 55 and the lower end wall of the friction block cavity 58, a squeezing block cavity 75 with an upward opening is arranged inside the supporting plate 39 and on the upper side of the extending plate cavity 37, a squeezing block 48 is connected inside the squeezing block cavity 75 in a sliding fit manner, a squeezing block spring 49 is fixedly connected between the lower end surface of the squeezing block 48 and the lower end wall of the squeezing block cavity 75, a motor closing switch 50 is fixedly connected inside the front end wall of the squeezing block cavity 75 and on the lower side of the squeezing block 48, a small magnet 47 is fixedly connected inside the squeezing block 48, the rear side of the extrusion block cavity 75 is communicated with a large magnet cavity 74, a large magnet 73 is connected in the large magnet cavity 74 in a sliding fit mode, and a friction block pull rope 57 is fixedly connected between the rear end face of the large magnet 73 and the lower end face of the friction block 55.

In addition, in one embodiment, the outer side of the supporting rod cavity 83 is communicated with a ground digging driving wheel cavity 25, the upper side of the ground digging driving wheel cavity 25 is provided with a ground digging belt cavity 28, the upper end wall of the ground digging driving wheel cavity 25 is connected with a ground digging transmission shaft 26 which extends downwards into the ground digging driving wheel cavity 25 and extends upwards into the ground digging belt cavity 28 in a rotating fit manner, the lower end of the ground digging transmission shaft 26 is fixedly connected with a ground digging driven gear 29 which can be meshed with the ground digging driven gear 29, the upper end of the ground digging transmission shaft 26 is fixedly connected with a ground digging driven gear shaft 46, four ground digging driven gear shafts 46 are connected with ground digging power belts 27 in a power fit manner, the upper side of the ground digging belt cavity 28 at the left front side is provided with a ground digging transmission cavity 44 which is positioned at the lower side of the extending plate cavity 37, the ground digging transmission shaft 26 at the left front side extends upwards into the ground digging transmission cavity 44, the front left end of the upper side of the ground digging transmission shaft 26 is fixedly connected with a ground digging transmission auxiliary wheel 45, the lower side of the ground digging transmission cavity 44 is provided with a meshing gear cavity 64, and the lower side of the meshing gear cavity 64 is communicated with a long rack cavity 65.

In addition, in one embodiment, a land planing wheel shaft 51 extending upwards into the land planing transmission cavity 44 and downwards into the meshing gear cavity 64 is fixedly connected to the end of the upper side of the meshing gear cavity 64, a land planing transmission pulley 52 is fixedly connected to the end of the upper side of the land planing wheel shaft 51, a land planing power belt 68 is connected between the land planing transmission pulley 52 and the land planing transmission secondary wheel 45 in a power fit manner, a meshing one-way bearing 61 is fixedly connected to the end of the lower side of the land planing wheel shaft 51, a meshing bevel gear 60 is fixedly connected to the outer side of the meshing one-way bearing 61, a meshing gear shaft 62 extending rightwards into the meshing gear cavity 64 is rotatably connected to the end wall of the left end of the meshing gear cavity 64 in a fit manner, a meshing gear 63 located in the meshing gear cavity 64 is fixedly connected to the meshing gear shaft 62, and an elongated rack 59 meshed with the meshing gear 63 is slidably connected to the elongated rack cavity, a long rack spring 66 is fixedly connected between the rear end face of the long rack 59 and the left end wall of the long rack cavity 65, and a long rack pull rope 67 is fixedly connected between the rear end face of the long rack 59 and the reel 70.

The fixing and connecting method in this embodiment includes, but is not limited to, bolting, welding, and the like.

As shown in fig. 1-3, in the initial state of the device of the present invention, the extension leaf spring 36 and the stopper spring 77 are in a compressed state, and the friction block spring 56 is in a stretched state;

sequence of mechanical actions of the whole device:

when the coal mining machine starts to work, a worker who mines a coal mine can directly drive the main body box 10 to enter a mining area, when the worker judges that the possibility of collapse is high, the motor 20 is started at the moment, the motor 20 drives the push plate one-way bearing 18 and the push plate driving gear 16 to rotate through the main power shaft 19, the push plate driving gear 16 rotates to drive the push plate driven gear 22 to rotate, the push plate driven gear 22 rotates to drive the push plate gear 12 to rotate through the push plate gear shaft 21, the push plate gear 12 rotates to drive the push plate rack 15 and the push plate 11 to move upwards under the action of the pulling force of the push plate rack spring 14, the push plate 11 has upward supporting force on the supporting plate 39 at the moment, and the push plate 11 starts to push the supporting plate 39;

when the supporting plate 39 touches the upper wall of the coal mine, at the moment, the extrusion block 48 is extruded by the upper wall of the coal mine and overcomes the thrust action of the extrusion block spring 49 to move downwards to the position where the small magnet 47 corresponds to the large magnet 73, at the moment, the small magnet 47 has forward suction to the large magnet 73, at the moment, the friction block pull rope 57 starts to pull the friction block 55 downwards, the friction block 55 overcomes the thrust action of the friction block spring 56 to move downwards under the tension action of the friction block pull rope 57, therefore, the friction block 55 no longer limits the rotation of the ground digging rod rotating shaft 84, at the moment, the supporting rod 31 starts to rotate downwards under the action of gravity and drives the ground digging rod rotating shaft 84 to rotate;

when the ground planing rod rotating shafts 84 rotate, the two ground planing rod rotating shafts 84 on the front side drive the ground planing driven belt wheel 54 to rotate, the ground planing driven belt wheel 54 drives the extension driven gear 80 to rotate through the extension power belt 79, the extension driven gear 80 drives the extension plate gear 41 to rotate through the extension plate gear shaft 81, the extension plate gear 41 rotates to drive the extension plate rack 42 and the extension plate 43 to move on the left side and the right side, and the supporting area can be increased;

meanwhile, the land planing rod rotating shaft 84 at the left rear part drives the wire wheel 70 to rotate, the wire wheel 70 rotates, the long rack 59 is pulled by the long rack pulling rope 67 to move backwards under the action of the thrust of the long rack spring 66, and at the moment, the meshing bevel gear 60 does not rotate under the action of the meshing one-way bearing 61;

when the supporting rod 31 rotates to a vertical state, the ground digging rod rotating shaft 84 does not rotate at the moment, at the same time, the extending plate rack 42 and the extending plate 43 also move to the position where the limiting block through cavity 82 corresponds to the limiting block cavity 78, and at the moment, the limiting block 76 moves upwards to the limiting block through cavity 82 under the thrust action of the limiting block spring 77 to play a role in fixing the extending plate 43;

meanwhile, the supporting rod 31 is in a vertical state, and the ground planing driven gear 29 is meshed with the ground planing driving gear 24 at the moment;

since the rotation of the digging rod rotation shaft 84 stops, the left rear digging rod rotation shaft 84 starts to rotate reversely under the action of the wire wheel return spring 72, and the left rear support rod 31 does not rotate under the action of the wire wheel one-way bearing 69, so that the left rear digging rod rotation shaft 84 rotates reversely to drive the wire wheel 70 to rotate reversely, so that the long rack pull rope 67 starts to loosen, the long rack 59 moves to the front side under the thrust action of the long rack spring 66, the engaging gear 63 rotates to drive the engaging bevel gear 60 to rotate to drive the digging belt wheel shaft 51 to rotate, the digging belt wheel shaft 51 rotates to drive the digging belt wheel 52 to rotate, so that the digging power belt 68 drives the digging transmission auxiliary wheel 45 to rotate, the digging transmission auxiliary wheel 45 rotates to drive the left front digging transmission shaft 26 to rotate, the left front digging transmission shaft 26 rotates to drive the left front digging driven wheel shaft 46 to rotate, so that the digging power belt 27 drives the digging transmission shaft 26 to rotate, the ground planing transmission shaft 26 rotates to drive the ground planing driving gear 24 to rotate;

when the ground planing driving gear 24 rotates, the ground planing driving gear 24 drives the ground planing driven gear 29 to rotate so as to drive the ground planing rotating shaft 33 to rotate, the ground planing rotating shaft 33 rotates to drive the ground planing fixing shaft 34 to rotate so as to enable the ground planing fixing shaft 34 to move downwards in the ground planing threaded cavity 32, and the ground planing piece 35 keeps rotating while moving downwards so as to be deeply fixed on the ground of a coal mine and play a role of thoroughly supporting the supporting plate 39;

at this time, the four support rods 31 are completely fixed, and the meshing gear 63 also stops rotating, so that the ground digging driving gear 24 stops rotating, the ground digging blade 35 also stops rotating, the ground digging fixing shaft 34 is fixed and does not rotate, meanwhile, the extrusion block 48 moves to a position abutting against the motor closing switch 50, the motor closing switch 50 triggers the motor 20 to close, at this time, the main power shaft 19 does not drive the push plate driving gear 16 to rotate any more, the push plate driven gear 22 and the push plate gear shaft 21 also stop rotating, at this time, under the action of the push plate return spring 23, the push plate gear shaft 21 starts to rotate reversely, the push plate gear shaft 21 rotates reversely to drive the push plate gear 12 to rotate reversely, the push plate gear 12 rotates reversely to drive the push plate rack 15 and the push plate 11 to move downwards to the original position, at this.

The invention has the beneficial effects that: this device can make the backup pad expand under the effect of gravity automatically and go deep into fixedly through supporting the backup pad to reach and carry out the fixed stay work to the colliery part of easy collapse, realized the work that the full automatization supported the colliery tunnel, reduced human operation, improved the work efficiency who excavates the colliery, practice thrift the cost of supporting simultaneously and guaranteed staff's the security of the lives and property.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.