CN114770064A - Bearing trolley, assembly conveying equipment, underground mine car assembly line and operation method of underground mine car assembly line - Google Patents

Abstract

The invention relates to the field of underground mine car standardized assembly, in particular to a bearing trolley, an assembly conveying device, an underground mine car assembly line and an operation method thereof, wherein the assembly conveying device at least comprises the following components: the first station, the second station, the third station, the fourth station, the fifth station, the sixth station, the seventh station, the eighth station and the ninth station are sequentially distributed along the length direction of the cover plate; the bearing frame is arranged above the floor drag chain and covers a station three, a station four, a station five, a station six and a station seven; and the bearing frame is respectively and detachably connected with suspension rail traveling cranes above the station four, the station five, the station six and the station seven. The invention adopts the ground drag chain to match with the trolley to serve as a device for conveying the frame, and the frame is conveyed at constant speed or variable speed and is sequentially assembled and taken off line through the station I, the station II, the station III, the station IV, the station V, the station VI, the station VII, the station eight and the station nine, so that the standardized production is completed.

Description

Bearing trolley, assembly conveying equipment, underground mine car assembly line and operation method of underground mine car assembly line

Technical Field

The invention relates to the field of standardized assembly of underground mine cars, in particular to a bearing trolley, assembly conveying equipment, an underground mine car assembly line and an operation method of the underground mine car assembly line.

Background

Underground mineral resources are formed under the influence of various factors for a plurality of years, and are influenced by various limitations when underground mineral deposits are collected, underground mine cars need to meet strict requirements for preventing open fire, preventing metal circuits from being exposed and the like, so that an independent station production mode is adopted in the early production process of the underground mine cars, the mode is low in production efficiency, the production period of a single mine car is long, the occupied production space is too much, the production line type mass production cannot be achieved, the standard operation is difficult to decompose, the consistency of a finished product is poor, the requirement on the skill of an assembler is high, front/rear axles are assembled from bottom to top, the assembly efficiency is low, and potential safety hazards exist in operation.

Disclosure of Invention

The application provides a bearing trolley, an assembly conveying device, an underground mine car assembly line and an operation method of the underground mine car assembly line, solves the problems of low efficiency and production safety of an existing underground mine car independent station production mode, achieves underground mine car assembly line production, and improves production efficiency through clear division of labor.

The technical problem solved by the invention can be realized by adopting the following technical scheme:

a load bearing support, comprising:

a carriage;

the two sides of the two ends of the sliding frame are respectively and rotatably connected with the track wheels;

the first support frame is detachably connected to the center of the upper surface of the sliding frame;

the second support frame is detachably connected to the middle position of the upper surface of the sliding frame;

a positioning portion detachably connected in the carriage.

Furthermore, the supporting surfaces of the first supporting frame and the second supporting frame are detachably connected with cushion blocks.

Further, the support frame has a pair of inwardly inclined legs at a top end thereof.

Further, the first support frame is a pair of bearing columns, and the pair of bearing columns are fixed on two sides of the upper surface of the sliding frame.

Furthermore, the second support frame comprises a U-shaped frame, a limiting hinge seat, a limiting clamping plate and a U-shaped limiting frame, the limiting hinge seat is fixed on two sides of the upper surface of the sliding frame, two ends of the U-shaped frame are hinged to the limiting hinge seats on two sides of the upper surface of the sliding frame respectively, the limiting clamping plate is fixed at one end of the sliding frame, two ends of the U-shaped limiting frame are hinged to one side of the U-shaped frame, and the U-shaped limiting frame is sleeved on the limiting clamping plate.

Further, the two sides of the sliding frame are respectively hinged with a guard plate, and the guard plates are respectively positioned between the pair of track wheels.

Further, location portion includes the bolt, inserts a section of thick bamboo, gag lever post and spring, it can dismantle the connection and locate at balladeur train center to insert a section of thick bamboo, the bolt bottom is passed and is inserted a section of thick bamboo and can dismantle the connection gag lever post, insert and set up the spring between an interior bottom surface of a section of thick bamboo and the bolt, and spring action is in the bolt.

An assembly conveying equipment, at least comprising the bearing support and further comprising:

a load bearing support;

the pair of slide ways are respectively detachably connected to the upper end and the lower end of the bearing bracket;

the pair of end wheels are respectively and rotatably connected to two ends of the bearing bracket;

one end of the floor drag chain is hinged with the other end of the floor drag chain by respectively bypassing the pair of slideways and the pair of end wheels, the floor drag chain is hinged with the pair of end wheels, and the bolt is inserted into a support hole of the floor drag chain and acts on the upper surface in the support hole through a limiting rod;

the adjusting assembly is detachably connected to one end of the bearing support, and one end wheel is rotatably connected to the adjusting part;

the variable frequency motor is detachably connected to the other end of the bearing support, a first chain wheel is detachably connected to the driving end of the variable frequency motor, a second chain wheel is detachably connected to a rotating shaft of the other end wheel, driving chains are meshed with the first chain wheel and the second chain wheel, the driving part is detachably connected to the other end of the bearing support, and the driving part is connected with the other end wheel;

the pair of cover plates are detachably connected to the top end of the bearing bracket, and the pair of cover plates are respectively positioned on two sides of the floor drag chain;

the pair of slide rails is detachably connected to the bearing support, the pair of slide rails is respectively positioned on two sides of the pair of cover plates, and the rail wheels are connected to the slide rails in a sliding manner;

and each pair of guide sliding chutes is respectively fixed on the bearing supports at two sides of the end wheel, and the distance between the pair of guide sliding chutes is the same as that between the pair of slide rails.

The lower bearing chute is detachably connected below the bearing support, and two ends of the lower bearing chute are detachably connected with the pair of guide chutes respectively.

An assembly line for underground mine cars, at least comprising the assembly conveying equipment, and further comprising:

the first station, the second station, the third station, the fourth station, the fifth station, the sixth station, the seventh station, the eighth station and the ninth station are sequentially distributed along the length direction of the cover plate;

the carrying frame is arranged above the floor drag chain and covers a third station, a fourth station, a fifth station, a sixth station and a seventh station;

a pair of engine split charging platforms are arranged on the fifth station, a pair of tire carriers are arranged on the seventh station, and a cab split charging platform is arranged on the eighth station;

and the bearing frame is respectively and detachably connected with suspension rail traveling cranes above the station four, the station five, the station six and the station seven.

An operation method of an underground mine car assembly line at least comprises the underground mine car assembly line, and further comprises the following steps: the upper surface of a main frame to be assembled is located on a pair of carrying trolleys at a first station, the two carrying trolleys respectively support a bracket body and an engine, the carrying trolleys are driven to move to a second station by starting an assembling and conveying device, the front and rear bridges of the main frame of the two stations are assembled by the front and rear bridges of the main frame of the two stations, then the main frame is arranged at a third station, the main frame is overturned by the third station through operation, so that the front and rear bridges of the main frame are located on the carrying trolleys, then the main frame enters a fourth station, parts of the front and rear bridges are installed by the fourth station, then the parts enter a fifth station, the parts of the engine are assembled by the fifth station, then the main frame enters a sixth station, the parts of the frame are installed by the sixth station, then the seventh station, the tires are installed by the seventh station, then the eighth station, the cab is installed by the eighth station, then the ninth station, debugging and inspection is carried out by the ninth station, and completing the offline.

The invention has the beneficial effects that: due to the adoption of the guard plate, the problem that the feet of the bearing trolley can go deep between the rail wheels during operation is effectively solved, and further safety accidents caused by workers going deep between the rail wheels are prevented.

Due to the fact that the U-shaped frame, the limiting clamping plate and the U-shaped limiting frame are adopted, the problem that the frame is inclined due to the fact that the height of the first supporting frame is not enough is effectively solved, and therefore the U-shaped frame is connected to the limiting clamping plate in a clamped mode through the U-shaped limiting frame, the U-shaped frame is kept in a vertical stable state, and the phenomenon that the frame is inclined due to stress is avoided.

Due to the fact that the ground drag chain is matched with the trolley to serve as a device for conveying the frame, the frame is conveyed at a constant speed or in a variable speed mode and is sequentially assembled and taken off line through the station I, the station II, the station III, the station IV, the station V, the station VI, the station VII, the station eight and the station nine, and accordingly standardized production is completed.

Due to the fact that the suspension rail travelling crane is adopted, the vehicle-mounted device is hoisted through the suspension rail travelling crane, assembly efficiency is improved, single-station independent control is formed, and the problems of collision and installation waiting due to multi-station sharing are solved.

Drawings

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

FIG. 1 is a schematic view of the structure of the load-carrying cart of the present invention.

Fig. 2 is a schematic view of the open structure of the U-shaped frame of the present invention.

Figure 3 is a top view of the support post of the present invention.

FIG. 4 is a top view of the inner angled leg of the present invention.

Fig. 5 is a schematic view of the cartridge structure of the present invention.

Fig. 6 is a schematic structural view of the assembled conveying equipment of the invention.

Fig. 7 is a cross-sectional view of the assembled delivery apparatus of the present invention.

FIG. 8 is a schematic view of an assembly line configuration for a downhole mine car according to the present invention.

In the figure: 1-a carriage; 2-a rail wheel; 3-supporting the frame I; 31-a support column; 4-a second support frame; 41-U-shaped frame; 42-a limit hinge seat; 43-a limit pallet; 44-U-shaped limiting frames; 5, a cushion block; 6-protecting plate; 7-a bolt; 8-inserting a barrel; 9-a limiting rod; 10-a spring; 11-a load-bearing support; 12-a slide; 13-end wheels; 14-a ground drag chain; 15-an adjustment assembly; 16-a variable frequency motor; 161-sprocket one; 162-sprocket two; 163-a drive chain; 17-a cover plate; 18-; a slide rail; 19-station one; 20-station two; 201-front axle sub-assembly table; 202-rear axle racking station; 21-station III; 22-station four; 23-station five; 231-an engine split charging station; 24-station six; 25-seven stations; 251-a tyre frame; 26-eight stations; 261-cab racking station; 27-nine station; 28-a carrier frame; 29-hanging the rail for traveling; 30-a guide chute; 301-lower carrying chute.

Detailed Description

Example 1:

referring to fig. 1, which is a schematic structural view of embodiment 1 of the present invention, a load-carrying cart is characterized by comprising:

a carriage 1;

the two sides of the two ends of the sliding frame 1 are respectively and rotatably connected with the track wheels 2;

the first support frame 3, the first support frame 3 is detachably connected to the center of the upper surface of the sliding frame 1;

the second support frame 4 is detachably connected to the middle position of the upper surface of the sliding frame 1;

a positioning portion detachably attached in the carriage 1.

In actual use: through dragging equipment and being connected with location portion, location portion drives balladeur train 1 and slides through rail wheel 2, through at support frame one 3 or support frame two 4, bears the weight of article or waits to assemble the main part and removes, can make through support frame one 3 and support frame two 4 of co-altitude not bear equipment and keep the level.

In this embodiment, when the second support frame 4 is opened, the top end of the second support frame 4 is higher than the top end of the first support frame 3, and when the second support frame 4 is closed, the top end of the first support frame 3 is higher than the top end of the second support frame 4.

Example 2:

referring to fig. 1-4, the present embodiment differs in that: the supporting surfaces of the first supporting frame 3 and the second supporting frame 4 are detachably connected with cushion blocks 5.

In actual use: the frame or the engine is carried on the first support frame 3 and the second support frame 4, and the cushion block 5 can prevent the frame or the engine from being in hard contact with each other and causing collision damage during moving.

Example 3:

referring to fig. 4, the present embodiment is different in that: the top end of the first support frame 3 is provided with a pair of legs which are inclined inwards.

In actual use: the support frame I3 is provided with the support legs which are inclined inwards, the engine or a non-planar structure is supported through the inclined support legs, effective support can be achieved, and unstable support caused by the fact that a single side is not in contact with the engine cannot occur.

Example 4:

referring to fig. 1 to 3, the present embodiment is different in that: the first support frame 3 is a pair of support columns 31, and the pair of support columns 31 are respectively fixed on two sides of the upper surface of the sliding frame 1.

In actual use: the bearing column 31 can support the leveled supporting surface, and plays a role in stable support.

Example 5:

referring to fig. 1-2, the present embodiment differs in that: the second support frame 4 comprises a U-shaped frame 41, a limiting hinge seat 42, a limiting clamping plate 43 and a U-shaped limiting frame 44, the limiting hinge seat 42 is fixed on two sides of the upper surface of the sliding frame 1, two ends of the U-shaped frame 41 are hinged to the limiting hinge seat 42 on two sides of the upper surface of the sliding frame 1 respectively, the limiting clamping plate 43 is fixed at one end of the sliding frame 1, two ends of the U-shaped limiting frame 44 are hinged to one side of the U-shaped frame 41, and the U-shaped limiting frame 44 is sleeved on the limiting clamping plate 43.

In actual use: the U-shaped frame 41 is rotated on the limiting hinging seat 42, so that the U-shaped frame 41 can be erected, the supporting end of the U-shaped frame 41 is positioned and is influenced by the limiting hinging seat 42, the U-shaped frame 41 can only be overturned for 90 degrees, the first supporting frame is arranged above the first supporting frame 3, the supporting height is improved, the frame and other parts are prevented from contacting the ground, meanwhile, the U-shaped limiting frame 44 is sleeved on the limiting clamping plate 43, when the U-shaped frame 41 is stressed, the U-shaped limiting frame 44 is matched with the limiting clamping plate 43 through the U-shaped limiting frame 44, the U-shaped frame 41 is limited from overturning during supporting, and the U-shaped frame 41 can stably support.

Example 6:

referring to fig. 1 and 3, the present embodiment is different in that: two sides of the sliding frame 1 are respectively hinged with a guard plate 6, and the guard plates 6 are respectively positioned between the pair of track wheels 2.

In actual use: the guard plate 6 can prevent feet of people or objects from extending into the space between the rail wheels 2 and prevent the moving rail wheels 2 from extruding and damaging the rail wheels.

Example 7:

referring to fig. 5, the present embodiment is different in that: location portion includes bolt 7, inserts a section of thick bamboo 8, gag lever post 9 and spring, it can dismantle to connect in 1 center department of balladeur train to insert a section of thick bamboo 8, 7 bottoms of bolt are passed and are inserted a section of thick bamboo 8 and can dismantle and connect gag lever post 9, insert and set up spring 10 between bottom surface and the bolt 7 in a section of thick bamboo 8, and spring 10 acts on bolt 7.

In actual use: promote bolt 7, 7 compression spring 10 of bolt, the gag lever post 9 of 7 bottoms of bolt inserts in the support hole of ground tow chain simultaneously, rotatory bolt 7 simultaneously, and bolt 7 makes the rotatory 90 degrees of gag lever post 9, then loosens bolt 7, and bolt 7 is upwards bounced under receiving the spring 10 effect, and gag lever post 9 cards is at the downthehole upper surface of support simultaneously, accomplishes and connects, drags bolt 7 through ground tow chain and can drive balladeur train 1 and remove through rail wheel 2.

Example 8:

referring to fig. 6-7, an assembly and transportation apparatus, comprising at least one carrying cart as described above, further comprises:

a carrier support 11;

a pair of slide ways 12, wherein the slide ways 12 are respectively detachably connected with the upper end and the lower end of the bearing bracket 11;

a pair of end wheels 13, wherein the pair of end wheels 13 are respectively connected with two ends of the bearing bracket 11 in a rotating way;

one end of the floor drag chain 14 is hinged with the other end of the floor drag chain 14 by respectively bypassing the pair of slide ways 12 and the pair of end wheels 13, the floor drag chain 14 is hinged with the pair of end wheels 13, the bolt 7 is inserted into a support hole of the floor drag chain 14 and acts on the upper surface in the support hole through the limiting rod 9;

an adjusting assembly 15, wherein the adjusting assembly 15 is detachably connected at one end of the bearing bracket 11, and one end wheel 13 is rotatably connected on the adjusting part;

the variable frequency motor 16 is detachably connected to the other end of the bearing support 11, a first chain wheel 161 is detachably connected to a driving end of the variable frequency motor 16, a second chain wheel 162 is detachably connected to a rotating shaft of the other end wheel 13, a driving chain 163 is meshed with the first chain wheel 161 and the second chain wheel 162, the driving part is detachably connected to the other end of the bearing support 11, and the driving part is connected with the other end wheel 13;

a pair of cover plates 17, the pair of cover plates 17 are detachably connected to the top end of the bearing bracket 11, and the pair of cover plates 17 are respectively positioned at two sides of the ground drag chain 14;

a pair of slide rails 18, the pair of slide rails 18 being detachably connected to the carrying bracket 11, the pair of slide rails 18 being respectively located at two sides of the pair of cover plates 17, the rail wheel 2 being slidably connected to the slide rails 18;

and the two pairs of guide sliding chutes 30 are respectively fixed on the bearing brackets 11 at two sides of the end wheel 13, and the distance between the pair of guide sliding chutes 30 is the same as that between the pair of slide rails 18.

And a lower carrying chute 301, wherein the lower carrying chute 301 is detachably connected below the carrying bracket 11, and two ends of the lower carrying chute 301 are detachably connected with the pair of guiding chutes 30 respectively.

In actual use: the variable frequency motor 16 is started, the driving end of the variable frequency motor 16 drives the second chain wheel 162 to rotate through the first chain wheel 161 and the driving chain 163, the second chain wheel drives the end wheel 13 to rotate, the end wheel 13 is matched with the end wheel 13 on the other side to enable the floor drag chain 14 to rotate on the slide rail 12 in a circulating mode, the floor drag chain drives the sliding frame 1 to move on the slide rail 12 through the rail wheel 2 through the bolt 7, starting and stopping and rotating speeds are controlled through the variable frequency motor 16, therefore, the moving speed of the sliding frame 1 is adjusted, and different required installation times of each station can be matched through adjustment.

The gap that produces between slide 12 and the drag chain 14 can be covered through apron 17, prevents that personnel from stepping on the sky, and the tool component from transferring into, prevents that the foreign matter from transferring into wherein to influence the operation of drag chain 14.

Through adjusting assembly 15, adjust one of them end wheel 13 front and back to adjust the interval between two end wheels 13, thereby accomplish the tight degree regulation that rises to ground tow chain 14, prevent that end wheel 13 and ground tow chain 14 meshing are unstable.

After the moving stroke of the slide rail 18, the bearing trolley is dragged into the guide chute 30 by the floor drag chain 14, the guide chute 30 limits the rail wheel 2 to prevent the bearing trolley from being separated, so that the bearing trolley continues to move and enters the lower bearing chute 301, the lower bearing chute 301 limits the rail wheel 2, so that the bearing trolley cannot fall off, then enters the guide chute 30 at the other side, and then moves to the slide rail 18

The adjusting assembly 15 in this embodiment is usually provided with an adjusting and tensioning structure.

Example 9:

referring to fig. 8, a downhole mine car assembly line, comprising at least one assembly and conveying apparatus as described above, further comprising:

a first station, a second station 20, a third station 21, a fourth station 22, a fifth station 23, a sixth station 24, a seventh station 25, an eighth station 26 and a ninth station 27 which are sequentially distributed along the length direction of the cover plate 17;

the carrying frame 28 is arranged above the ground drag chain 14, and the carrying frame 28 covers the third station 21, the fourth station 22, the fifth station 23, the sixth station 24 and the seventh station 25;

a front axle split charging platform 201 and a rear axle split charging platform 202 are respectively arranged on two sides of the second station 20, an engine split charging platform 231 is respectively arranged on two sides of the fifth station 23, a tire frame 251 is respectively arranged on two sides of the seventh station 25, and a cab split charging platform is arranged on the eighth station 26;

and suspension rail traveling cranes 29 are detachably connected to the bearing frame 28 and are respectively positioned above the station four 22, the station five 23, the station six 24 and the station seven 25.

In actual use: firstly, placing a pair of bearing trolleys on a first station 19, placing the back surfaces of the frames on a first supporting frame 3 of the pair of bearing trolleys by an indoor travelling crane, respectively supporting an engine and a frame body of the frame by the first supporting frame 3 with an inward inclination angle and a carriage 1 of a bearing column 31, then driving the bearing trolleys to move to a second station 20 by a tow chain 14, simultaneously repeating the steps on the first station 19, lifting front and rear axles by the travelling crane when the frames move to the second station 20, then respectively matching with workers to install the frames by tools on a front axle split-mounting platform 201 and a rear axle split-mounting platform 202, then driving the bearing trolleys to move to a third station 21 by the tow chain 14, simultaneously repeating the steps on the second station 20, lifting and overturning the frames with the front and rear axles by the travelling crane at the third station 21, simultaneously lifting and limiting the second supporting frame 4, preventing the overturned frames from being on the second supporting frame 4, the supporting height is improved, the front axle and the rear axle are prevented from being in contact with the ground, then the floor towing chain 14 drives the carrying trolley to move to a station four 22, the station three 21 repeats the steps, the station four 22 is matched with the suspension rail travelling crane 29 to mount parts of the frame, such as parts of a fire extinguishing box body and the like, then the floor towing chain 14 drives the carrying trolley to move to a station five 23, the station four 22 repeats the steps, the station five 23 is matched with the suspension rail travelling crane 29 to mount and connect the parts of the engine of the frame, the parts are prevented through classification of the engine split charging platform 231, workers can conveniently take and operate, then the floor towing chain 14 drives the carrying trolley to move to a station six 24, the station five 23 repeats the steps, the station six 24 is matched with the suspension rail travelling crane 29 to mount small parts of the frame, such as parts of an interception hook and the like, then the floor towing chain 14 drives the carrying trolley to move to a station seven 25, and simultaneously, the sixth station 24 repeats the steps, the seventh station 25 is matched with a suspension rail travelling crane 29 to lift tires on a tire frame 251, then hubs on two sides of a front axle and a rear axle are connected and installed, then a floor tow chain 14 drives a bearing trolley to move to the eighth station 26, the seventh station 25 repeats the steps, the eighth station 26 is matched with an indoor travelling crane to connect the cab with a frame, a control assembly in the cab is installed, required parts are placed in a cab split charging platform, then the floor tow chain 14 drives the bearing trolley to move to the ninth station 27, the eighth station 26 repeats the steps, the ninth station 27 performs inspection test on the assembled finished vehicle, and then the indoor travelling crane is matched to release the connection with the bearing trolley, so that the vehicle is taken off line.

Example 10:

1-8, a method of operating a downhole tram assembly line, comprising at least a downhole tram assembly line as claimed in claim 9, further comprising the steps of: the upper surface of a main frame to be assembled is located on a pair of carrying trolleys on a station I19, the two carrying trolleys respectively support a bracket body and an engine, the carrying trolleys are driven to move to a station II 20 by starting an assembling and conveying device, front and rear axles of the main frame are assembled through the station II 20 and then enter a station III 21, the main frame is turned over through operation of the station III 21, the front and rear axles of the main frame are located on the carrying trolleys respectively, then the main frame enters the station IV 22, parts of the front and rear axles are installed through the station IV 22 and then enter the station V23, parts of the engine are assembled through the station V23 and then enter the station VI 24, the parts of the frame are installed through the station VI 24 and then enter the station VII 25, tires are installed through the station VII 25 and then enter the station VIII 26, cab installation is carried out through the station VIII 26, and then entering a station nine 27, and carrying out whole vehicle debugging and inspection through the station nine 27 to finish off-line.

While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and the scope of the present invention is within the scope of the claims.

Claims (10)

1. A load carrying cart, comprising:

a carriage (1);

the two sides of the two ends of the sliding frame (1) are respectively and rotatably connected with the track wheels (2);

the first support frame (3), the first support frame (3) is detachably connected to the center of the upper surface of the sliding frame (1);

the second support frame (4), the second support frame (4) is detachably connected to the middle position of the upper surface of the sliding frame (1);

a positioning part detachably connected in the carriage (1).

2. The carrying trolley according to claim 1, wherein the supporting surfaces of the first supporting frame (3) and the second supporting frame (4) are detachably connected with a cushion block (5).

3. The carrying trolley according to claim 2, characterized in that the top end of the first support frame (3) has a pair of legs inclined inwards.

4. The load-carrying trolley as claimed in claim 2, characterized in that said first support frame (3) is a pair of support posts (31), and a pair of said support posts (31) are fixed on both sides of the upper surface of the carriage (1).

5. The carrying trolley according to claim 2, wherein the second supporting frame (4) comprises a U-shaped frame (41), a limiting hinge seat (42), a limiting clamping plate (43) and a U-shaped limiting frame (44), the two sides of the upper surface of the carriage (1) are respectively fixed with the limiting hinge seat (42), the two ends of the U-shaped frame (41) are respectively hinged to the limiting hinge seats (42) on the two sides of the upper surface of the carriage (1), the limiting clamping plate (43) is fixed at one end of the carriage (1), the two ends of the U-shaped limiting frame (44) are both hinged to one side of the U-shaped frame (41), and the U-shaped limiting frame (44) is sleeved on the limiting clamping plate (43).

6. The load-carrying trolley according to claim 1, characterized in that the side of the carriage (1) is hinged with a guard plate (6), and the guard plates (6) are respectively located between a pair of track wheels (2).

7. The carrying trolley according to claim 1, wherein the positioning part comprises a bolt (7), an insertion cylinder (8), a limiting rod (9) and a spring (10), the insertion cylinder (8) is detachably connected to the center of the sliding frame (1), the bottom end of the bolt (7) penetrates through the insertion cylinder (8) and is detachably connected with the limiting rod (9), the spring (10) is arranged between the inner bottom surface of the insertion cylinder (8) and the bolt (7), and the spring (10) acts on the bolt (7).

8. An assembly conveyor, characterized in that it comprises at least a carriage according to any one of claims 1 to 7, and further comprises:

a carrier support (11);

the pair of slide ways (12), the pair of slide ways (12) are respectively detachably connected with the upper end and the lower end of the bearing bracket (11);

a pair of end wheels (13), wherein the pair of end wheels (13) are respectively and rotatably connected with the two ends of the bearing bracket (11);

one end of the floor drag chain (14) respectively bypasses the pair of slide ways (12) and the pair of end wheels (13) to be hinged with the other end of the floor drag chain (14), the floor drag chain (14) is hinged with the pair of end wheels (13), and the bolt (7) is inserted into a support hole of the floor drag chain (14) and acts on the inner upper surface of the support hole through the limiting rod (9);

the adjusting assembly (15), the adjusting assembly (15) is detachably connected to one end of the bearing bracket (11), and one end wheel (13) is rotatably connected to the adjusting part;

the variable frequency motor (16) is detachably connected to the other end of the bearing support (11), the driving end of the variable frequency motor (16) is detachably connected with a first chain wheel (161), the rotating shaft of the other end wheel (13) is detachably connected with a second chain wheel (162), the first chain wheel (161) and the second chain wheel (162) are meshed with a driving chain (163), the driving part is detachably connected to the other end of the bearing support (11), and the driving part is connected with the other end wheel (13);

the pair of cover plates (17) are detachably connected to the top end of the bearing support (11), and the pair of cover plates (17) are respectively positioned on two sides of the ground drag chain (14);

the pair of sliding rails (18) are detachably connected to the bearing bracket (11), the sliding rails (18) are respectively positioned on two sides of the pair of cover plates (17), and the rail wheel (2) is connected to the sliding rails (18) in a sliding manner;

the two pairs of guide chutes (30), each pair of guide chutes (30) is respectively fixed on the bearing bracket (11) at two sides of the end wheel (13), and the distance between the pair of guide chutes (30) is the same as that between the pair of slide rails (18);

the lower bearing chute (301) is detachably connected below the bearing bracket (11), and two ends of the lower bearing chute (301) are respectively detachably connected with the pair of guide chutes (30).

9. An underground mine car assembly line, comprising at least one assembly conveyor apparatus according to claim 8, and further comprising:

the device comprises a cover plate (17), and a first station (19), a second station (20), a third station (21), a fourth station (22), a fifth station (23), a sixth station (24), a seventh station (25), an eighth station (26) and a ninth station (27) which are sequentially distributed along the length direction of the cover plate (17);

the carrying frame (28) is arranged above the ground drag chain (14), and the carrying frame (28) covers the third station (21), the fourth station (22), the fifth station (23), the sixth station (24) and the seventh station (25);

a front axle split charging platform (201) and a rear axle split charging platform (202) are respectively arranged on two sides of the second station (20), an engine split charging platform (231) is respectively arranged on two sides of the fifth station (23), a tire frame (251) is respectively arranged on two sides of the seventh station (25), and a cab split charging platform (261) is arranged on the eighth station (26);

and the bearing frame (28) is respectively detachably connected with a suspension rail traveling crane (29) above the station four (22), the station five (23), the station six (24) and the station seven (25).

10. A method of operating a downhole mine car assembly line, comprising at least one downhole mine car assembly line as claimed in claim 9, further comprising the steps of: the upper surface of a main frame to be assembled is located on a pair of carrying trolleys on a station I (19), the two carrying trolleys respectively support a bracket body and an engine, the carrying trolleys are driven to move to a station II (20) by starting an assembling and conveying device, front and rear axles of the main frame are assembled through the station II (20), then the main frame enters a station III (21), the station III (21) overturns the main frame through operation, the front and rear axles of the main frame are located on the carrying trolleys, then the main frame enters a station IV (22), parts of the front and rear axles are installed through the station IV (22), then the main frame enters a station V (23), the parts of the engine are assembled through the station V (23), then the main frame enters a station VI (24), the parts attached to the frame are installed through the station VI (24), then the main frame enters a station VII (25), and tires are installed through the station VII (25), then the vehicle enters a station eight (26), cab installation is carried out through the station eight (26), then the vehicle enters a station nine (27), and whole vehicle debugging and inspection are carried out through the station nine (27), so that offline is completed.

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