CN114608978A

CN114608978A - Loading test device for traction part of coal mining machine

Info

Publication number: CN114608978A
Application number: CN202210279262.0A
Authority: CN
Inventors: 刘子亮
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-03-21
Filing date: 2022-03-21
Publication date: 2022-06-10

Abstract

The invention belongs to the technical field of coal mining machines, and particularly relates to a loading test device for a traction part of a coal mining machine. When the loading test is carried out on the coal cutter traction part, the moving state of the traction part in the actual working process is simulated, the cam block is driven by the third motor to rotate continuously, and the periodic load is applied to the traction part through the rotating shaft, the supporting plate and the sleeve plate in the continuous rotating process of the cam block, so that the periodic load state from the cutting part in the actual working process of the traction part is simulated, and the test accuracy is improved; the invention can adjust the load period of the traction part, thereby further simulating the actual working condition.

Description

Loading test device for traction part of coal mining machine

Technical Field

The invention belongs to the technical field of coal mining machines, and particularly relates to a loading test device for a traction part of a coal mining machine.

Background

The coal mining machine is a coal mining machine which breaks down coal from a coal body and loads the coal into a working face conveyor on a longwall coal mining working face. The coal cutter runs at a set traction speed, so that the working procedures of coal breaking and coal loading can be continuously carried out. The coal mining machine generally comprises a cutting part, a loading part, a traction part, a motor, an operation control system, an auxiliary device and the like. The traction part of the coal mining machine bears traction force and loads from the cutting part when in work, and a loading experiment must be carried out on the traction part to ensure that the traction part cannot deform when in work, so that the traction part can move smoothly along the guide rail.

The existing loading test device can only apply quantitative load to a static traction part in the process of testing the traction part of the coal mining machine, but the traction part is in a moving state during actual work, and the load of the traction part from a cutting part is usually a load which changes periodically, so that the load in the form is easy to cause material fatigue damage, and the existing test device is difficult to simulate the actual working condition, thereby causing adverse effect on the accuracy of the test; and the existing test device usually observes whether the traction part is deformed or not through manual observation, so that the human eyes can not accurately observe the micro deformation, and the test accuracy is also adversely affected.

Disclosure of Invention

In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a coal-winning machine traction portion load test device, including the horizontally bottom plate, surface sliding installs the horizontally sliding plate on the bottom plate, the vertical fixed mounting in sliding plate upper surface has two push pedals that are parallel to each other, surface fixed mounting has two first screw rod supports on the bottom plate, horizontal rotation installs first lead screw between two first screw rod supports, first lead screw runs through two push pedals with screw-thread fit mode, fixed mounting has first motor on one of them first screw rod support, the output and the first lead screw fixed connection of first motor.

Horizontal ear plates are fixedly arranged on the left side and the right side of the sliding plate, the ear plates are in sliding fit with the bottom plate, and a loading mechanism and a detection mechanism are arranged on the ear plates; the upper surface of the bottom plate is horizontally and fixedly provided with two guide rails which are respectively positioned at the left side and the right side of the sliding plate, the top surfaces of the guide rails are horizontal planes, and the guide rails are parallel to the first lead screw.

The loading mechanism comprises an installation plate which is installed on the upper surface of the lug plate in a sliding mode along the left-right direction, two second lead screw supports are fixedly installed on the upper surface of the lug plate, a second lead screw which is perpendicular to the first lead screw is horizontally installed between the two second lead screw supports in a rotating mode, the second lead screw penetrates through the installation plate in a threaded fit mode, a second motor is fixedly installed on one second lead screw support, and the output end of the second motor is fixedly connected with the second lead screw; a horizontal connecting plate is fixedly installed on the surface, facing the sliding plate, of the mounting plate, a horizontal sleeve plate is sleeved at the end part of the connecting plate, an opening is formed in the end face, facing the connecting plate, of the sleeve plate, the upper surface of the connecting plate is attached to the top surface of the interior of the sleeve plate, two limiting columns are vertically and fixedly installed in the sleeve plate, and the limiting columns penetrate through the connecting plate and are in sliding fit with the connecting plate; the vertical fixed mounting of lagging top surface has the backup pad, rotates through the bearing level in the backup pad and installs the axis of rotation that runs through the backup pad, and the one end fixed mounting that the mounting panel was kept away from to the axis of rotation has the cam piece, and the focus of cam piece does not coincide with the axis of rotation, and fixed mounting has the third motor that is used for driving axis of rotation pivoted on the mounting panel.

As a preferred technical scheme of the present invention, the end of the rotating shaft facing the mounting plate and the end of the output shaft of the third motor are both fixedly provided with a disk, the circumferential surface of the disk is uniformly provided with a plurality of accommodating grooves along the circumferential direction, the accommodating grooves are slidably provided with sliders, the outer end surfaces of the sliders are provided with transmission teeth, two disks in the same loading mechanism are connected through a synchronous belt, and the synchronous belt is matched with the transmission teeth on the outer end surfaces of the sliders on the two disks.

As a preferred technical scheme of the invention, a bearing plate is fixedly arranged in the accommodating groove, a supporting spring is fixedly connected between the bearing plate and the inner end face of the sliding block, and a wedge-shaped block is fixedly arranged on the inner end face of the sliding block; the end face of the disc is provided with a threaded rod coincident with the axis of the disc in a threaded matching mode, the inner end face of the threaded rod is fixedly provided with a conical block, and the conical surface of the conical block is attached to the inclined surface of the wedge block.

As a preferred technical scheme of the invention, the top surface of the push plate is vertically and fixedly provided with guide plates which are parallel to each other, and the top surface of each guide plate is an arc-shaped surface.

As a preferred technical scheme of the invention, the detection mechanism comprises a sleeve fixedly arranged on the upper surface of the ear plate, a lifting block is vertically and fixedly arranged at the top of the sleeve, a telescopic spring is vertically and fixedly connected between the bottom surface of the lifting block and the bottom surface inside the sleeve, a pressure sensor is fixedly arranged on the inner wall of the sleeve, and an alarm connected with the pressure sensor is arranged on the outer wall of the sleeve; the top of the lifting block is provided with a vertical lifting rod in a thread matching mode, and the top of the lifting rod is fixedly provided with a bearing sheet.

As a preferable technical scheme of the invention, the edge of the bottom surface of the lifting block is fixedly provided with a sealing ring which is in sliding fit with the inner wall of the sleeve.

According to a preferable technical scheme, the top surface of the guide rail is provided with a horizontal groove along the length direction, the bottom surface of the horizontal groove is uniformly provided with a plurality of vertical grooves, the vertical grooves are internally and vertically and slidably provided with buffer rods, a buffer spring is fixedly connected between the bottom ends of the buffer rods and the bottom surface of the vertical groove, and the top ends of the buffer rods are jointly and fixedly provided with a horizontal buffer plate.

According to a preferred technical scheme, the bottom surface of the buffer plate is fixedly provided with a connecting rod, the bottom end of the connecting rod is fixedly provided with a hemispherical block, the top surface and the bottom surface of the hemispherical block are respectively a horizontal plane and a hemispherical plane, the bottom surface of the horizontal groove is vertically provided with a first limiting groove corresponding to the position of the hemispherical block, the side wall of the first limiting groove is horizontally provided with a second limiting groove, a limiting block is horizontally and slidably arranged in the second limiting groove, the edge of the top surface of the limiting block is arc-shaped, the bottom surface of the limiting block is a horizontal plane, a limiting spring is fixedly connected between the end surface of the limiting block and the end surface of the second limiting groove, the limiting block is fixedly provided with a shifting rod, and the shifting rod extends outwards to the outer side wall of the guide rail.

The invention has at least the following beneficial effects: (1) when the loading test is carried out on the traction part of the coal mining machine, the traction part moves horizontally in a reciprocating manner under the pushing of the push plate, so that the moving state of the traction part in the actual working process is simulated, meanwhile, the cam block is driven by the third motor to rotate continuously, and periodic load is applied to the traction part through the rotating shaft, the supporting plate and the sleeve plate in the continuous rotating process of the cam block, so that the periodic load state from the cutting part in the actual working process of the traction part is simulated, and the test accuracy is improved; the invention can adjust the load period of the traction part, thereby further simulating the practical working condition.

(2) According to the invention, the detection mechanism detects the air pressure in the sleeve through the air pressure sensor, and even if the traction part generates small deformation under the action of a load, the air pressure in the sleeve is increased due to the descending of the lifting block, so that the alarm can accurately and timely report the deformation condition of the traction part, and the accuracy is greatly improved compared with the observation of naked eyes.

Drawings

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

FIG. 1 is a schematic perspective view of a loading test device of a coal mining machine traction part in an embodiment of the invention.

Fig. 2 is an enlarged schematic view of a point a in fig. 1.

FIG. 3 is a front view of a coal cutter tractor traction portion loading test apparatus in an embodiment of the invention.

Fig. 4 is an enlarged schematic view of fig. 3 at B.

Fig. 5 is a side view of a part of the internal structure of a guide rail in an embodiment of the present invention.

Fig. 6 is a front view of the internal mechanism of the disc in an embodiment of the present invention.

In the figure: 1. a base plate; 2. a sliding plate; 3. pushing the plate; 4. a first lead screw bracket; 5. a first lead screw; 6. a first motor; 7. an ear plate; 8. a loading mechanism; 801. mounting a plate; 802. a second lead screw bracket; 803. a second lead screw; 804. a second motor; 805. a connecting plate; 806. sheathing; 807. a limiting column; 808. a support plate; 809. a rotating shaft; 810. a cam block; 811. a third motor; 812. a disc; 813. accommodating grooves; 814. a slider; 815. a synchronous belt; 816. a pressure bearing sheet; 817. a support spring; 818. a wedge block; 819. a threaded rod; 820. a conical block; 9. a detection mechanism; 901. a sleeve; 902. a lifting block; 903. a tension spring; 904. a pressure sensor; 905. an alarm; 906. a lifting rod; 907. a pressure bearing sheet; 908. a seal ring; 10. a guide rail; 1001. a horizontal groove; 1002. a vertical slot; 1003. a buffer rod; 1004. a buffer spring; 1005. a buffer plate; 1006. a connecting rod; 1007. a hemispherical block; 1008. a first limit groove; 1009. a second limit groove; 1010. a limiting block; 1011. a limiting spring; 1012. a deflector rod; 11. a guide plate.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

As shown in fig. 1 and fig. 3, the present embodiment provides a loading test device for a traction part of a coal mining machine, which includes a horizontal bottom plate 1, a horizontal sliding plate 2 is slidably mounted on the upper surface of the bottom plate 1, two parallel push plates 3 are vertically and fixedly mounted on the upper surface of the sliding plate 2, guide plates 11 parallel to the push plates 3 are vertically and fixedly mounted on the top surfaces of the push plates 3, and the top surfaces of the guide plates 11 are arc surfaces; fixed surface installs two first lead screw support 4 on the bottom plate 1, and the horizontal rotation installs first lead screw 5 between two first lead screw support 4, and first lead screw 5 runs through two push pedal 3 with screw-thread fit mode, and fixed mounting has first motor 6 on one of them first lead screw support 4, first motor 6's output and first lead screw 5 fixed connection.

As shown in fig. 1 and 3, horizontal ear plates 7 are fixedly mounted on the left and right sides of the sliding plate 2, the ear plates 7 are in sliding fit with the bottom plate 1, and a loading mechanism 8 and a detection mechanism 9 are mounted on the ear plates 7; the upper surface of the bottom plate 1 is horizontally and fixedly provided with two guide rails 10 which are respectively positioned at the left side and the right side of the sliding plate 2, the top surfaces of the guide rails 10 are horizontal planes, and the guide rails 10 are parallel to the first lead screw 5.

After the traction part is hoisted by a crane, the traction part is downwards placed on the guide rail 10 under the guiding action of the guide plate 11, and the two push plates 3 are positioned at the front end and the rear end of the traction part; in the process of driving the first lead screw 5 to rotate back and forth through the first motor 6, the first lead screw 5 drives the two push plates 3 to move back and forth, the two push plates 3 drive the sliding plate 2 to slide back and forth on the upper surface of the bottom plate 1, and the push plates 3 simultaneously push the traction part to move back and forth along the guide rail 10; in this process, a load is applied to the traction portion by the loading means 8, and the deformation of the traction portion is detected by the detection means 9.

As shown in fig. 5, a horizontal groove 1001 is formed in the top surface of the guide rail 10 along the length direction of the guide rail, a plurality of vertical grooves 1002 are uniformly formed in the bottom surface of the horizontal groove 1001, a buffer rod 1003 is vertically and slidably mounted in the vertical groove 1002, a buffer spring 1004 is fixedly connected between the bottom end of the buffer rod 1003 and the bottom surface of the vertical groove 1002, and a horizontal buffer plate 1005 is fixedly mounted at the top end of the buffer rods 1003 together; buffer board 1005 bottom surface fixed mounting has connecting rod 1006, connecting rod 1006 bottom fixed mounting has hemisphere piece 1007, hemisphere piece 1007 top surface and bottom surface are horizontal plane and hemisphere face respectively, first spacing groove 1008 has been seted up to the position that horizontal groove 1001 bottom surface corresponds hemisphere piece 1007 vertically, second spacing groove 1009 has been seted up to the lateral wall of first spacing groove 1008 raising one's level, horizontal slidable mounting has stopper 1010 in the second spacing groove 1009, stopper 1010 top surface edge is the arc and stopper 1010 bottom surface is the horizontal plane, fixedly connected with spacing spring 1011 between stopper 1010 terminal surface and the second spacing groove 1009 terminal surface, fixed mounting has driving lever 1012 on the stopper 1010, driving lever 1012 outwards extends to on the guide rail 10 lateral wall.

In the process of hanging the traction part on the guide rail 10 through the crane, the traction part is firstly attached to the buffer plate 1005 and pushes the buffer plate 1005 to move downwards, the buffer plate 1005 drives the buffer rod 1003 to move downwards along the vertical groove 1002, the buffer spring 1004 is compressed, the buffer spring 1004 has a buffer effect on the descending process of the traction part until the traction part is attached to the upper surface of the guide rail 10, and in the state, the upper surface of the buffer plate 1005 is attached to the upper surface of the guide rail 10; through buffering the traction part, the impact force of the traction part on the guide rail 10 is reduced, so that the guide rail 10 is prevented from being deformed, the traction part can horizontally move along the guide rail 10 in the test process, and the test accuracy is further ensured; in the process, the buffer plate 1005 drives the connecting rod 1006 and the hemispherical block 1007 to move downwards, the hemispherical block 1007 pushes away the limiting block 1010 after entering the first limiting groove 1008, the random limiting block 1010 resets under the resilience force of the limiting spring 1011, when the traction part is attached to the upper surface of the guide rail 10, the upper surface of the hemispherical block 1007 is attached to the lower surface of the limiting block 1010, and the limiting block 1010 has a limiting effect on the hemispherical block 1007, so that the connecting rod 1006 and the buffer plate 1005 are limited, the upper surface of the buffer plate 1005 is guaranteed to be always flush with the upper surface of the guide rail 10, and the traction part is prevented from colliding with the buffer plate 1005 in the horizontal moving process along the guide rail 10; after the experiment is completed, the traction part is lifted away from the guide rail 10 through the crane, then the limiting block 1010 is driven to horizontally move in the second limiting groove 1009 through the manual fluctuation shifting rod 1012 until the limiting block 1010 is separated from the hemispherical block 1007, the limiting block 1010 no longer plays a limiting role on the hemispherical block 1007, and the buffer rod 1003 and the buffer plate 1005 rise and reset under the effect of the resilience force of the buffer spring 1004.

As shown in fig. 1 and 3, the loading mechanism 8 includes a mounting plate 801 slidably mounted on the upper surface of the ear plate 7 in the left-right direction, two second lead screw brackets 802 are fixedly mounted on the upper surface of the ear plate 7, a second lead screw 803 perpendicular to the first lead screw 5 is horizontally rotatably mounted between the two second lead screw brackets 802, the second lead screw 803 penetrates through the mounting plate 801 in a thread fit manner, a second motor 804 is fixedly mounted on one of the second lead screw brackets 802, and an output end of the second motor 804 is fixedly connected with the second lead screw 803; a horizontal connecting plate 805 is fixedly installed on the surface, facing the sliding plate 2, of the mounting plate 801, a horizontal sleeve plate 806 is sleeved on the end portion of the connecting plate 805, an opening is formed in the end face, facing the connecting plate 805, of the sleeve plate 806, the upper surface of the connecting plate 805 is attached to the top surface of the interior of the sleeve plate 806, two limiting columns 807 are vertically and fixedly installed in the sleeve plate 806, and the limiting columns 807 penetrate through the connecting plate 805 and are in sliding fit with the connecting plate 805; the supporting plate 808 is vertically and fixedly installed on the top surface of the sleeve plate 806, the rotating shaft 809 penetrating through the supporting plate 808 is horizontally and rotatably installed on the supporting plate 808 through a bearing, the cam block 810 is fixedly installed at one end, away from the installation plate 801, of the rotating shaft 809, the center of gravity of the cam block 810 is not overlapped with the axis of the rotating shaft 809, and the third motor 811 used for driving the rotating shaft 809 to rotate is fixedly installed on the installation plate 801.

When the traction part is positioned on the guide rail 10, the second motor 804 drives the second lead screw 803 to rotate, the second lead screw 803 drives the mounting plate 801 to move towards the traction part, in the process, the sleeve plate 806 is lifted upwards manually until the bottom surface of the sleeve plate 806 is attached to the top surface of the traction part, and in this state, the bottom surface and the top surface of the connecting plate 805 are not attached to the sleeve plate 806; when the rotating shaft 809 is driven by the third motor 811 to rotate, the rotating shaft 809 drives the cam block 810 to rotate, and when the cam block 810 rotates, a periodic load is applied to the traction part through the rotating shaft 809, the support plate 808 and the sleeve plate 806; when the traction part moves, the sliding plate 2 drives the lug plate 7 and the loading mechanism 8 to synchronously move along with the traction part and continuously apply periodic load to the traction part.

As shown in fig. 2 and 6, disks 812 are fixedly mounted at one end of the rotating shaft 809 facing the mounting plate 801 and at an output shaft end of the third motor 811, a plurality of receiving grooves 813 are uniformly formed on the circumferential surface of the disk 812 along the circumferential direction, sliders 814 are slidably mounted in the receiving grooves 813, transmission teeth are formed on the outer end surfaces of the sliders 814, two disks 812 in the same loading mechanism 8 are connected through a synchronous belt 815, and the synchronous belt 815 is matched with the transmission teeth on the outer end surfaces of the sliders 814 on the two disks 812; a bearing piece 816 is fixedly arranged in the accommodating groove 813, a supporting spring 817 is fixedly connected between the bearing piece 816 and the inner end face of the sliding block 814, and a wedge block 818 is fixedly arranged on the inner end face of the sliding block 814; a threaded rod 819 with the axis coincident with the end face of the disc 812 is mounted on the end face of the disc 812 in a threaded matching mode, a conical block 820 is fixedly mounted on the inner end face of the threaded rod 819, and the conical surface of the conical block 820 is attached to the inclined surface of the wedge block 818.

In an initial state, the supporting spring 817 is in a stretched state, the threaded rod 819 is rotated to drive the conical block 820 to move horizontally, and due to the fact that the conical surface of the conical block 820 is attached to the inclined surface of the wedge block 818, the thrust of the conical block 820 or the resilience force of the supporting spring 817 enables the wedge block 818 and the sliding block 814 to be far away from the axis of the disc 812 or close to the axis of the disc 812, so that the transmission ratio of the two discs 812 during rotation is changed, and the loading frequency of the traction part is adjusted.

As shown in fig. 4 and 5, the detection mechanism 9 includes a sleeve 901 fixedly mounted on the upper surface of the ear plate 7, an elevator 902 is vertically and fixedly mounted on the top of the sleeve 901, an extension spring 903 is vertically and fixedly connected between the bottom surface of the elevator 902 and the bottom surface of the interior of the sleeve 901, a pressure sensor 904 is fixedly mounted on the inner wall of the sleeve 901, and an alarm 905 connected with the pressure sensor 904 is mounted on the outer wall of the sleeve 901; the top of the lifting block 902 is provided with a vertical lifting rod 906 in a thread fit mode, and the top of the lifting rod 906 is fixedly provided with a pressure bearing sheet 907; a sealing ring 908 in sliding fit with the inner wall of the sleeve 901 is fixedly arranged at the edge of the bottom surface of the lifting block 902; the pressure bearing sheet 907 is rotated to drive the lifting rod 906 to ascend until the upper surface of the pressure bearing sheet 907 is attached to the bottom surface of the traction part, when the traction part deforms, the pressure bearing sheet 907 is pressed to drive the lifting rod 906 and the lifting block 902 to descend, the telescopic spring 903 is compressed, the air pressure inside the sleeve 901 increases, the pressure sensor 904 detects that the air pressure inside the sleeve 901 increases and then transmits a signal to the alarm 905, and the alarm 905 gives an alarm to prompt an operator that the traction part deforms.

The working process of the loading test device for the traction part of the coal mining machine in the embodiment is as follows: the traction part is hoisted by a crane and then is downwards placed on the guide rail 10 under the guiding action of the guide plate 11; in the process of driving the first lead screw 5 to rotate in a reciprocating manner through the first motor 6, the first lead screw 5 drives the two push plates 3 to move in a reciprocating manner, the two push plates 3 drive the sliding plate 2 and the lug plate 7 to slide in a reciprocating manner on the upper surface of the bottom plate 1, and the push plates 3 simultaneously push the traction part to move in a reciprocating manner along the guide rail 10; in this process, a load is applied to the traction portion by the loading mechanism 8, and the deformation of the traction portion may be detected by the detection mechanism 9.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a coal-winning machine traction portion loading test device which characterized in that: the device comprises a horizontal bottom plate (1), wherein a horizontal sliding plate (2) is slidably mounted on the upper surface of the bottom plate (1), two parallel push plates (3) are vertically and fixedly mounted on the upper surface of the sliding plate (2), two first lead screw supports (4) are fixedly mounted on the upper surface of the bottom plate (1), a first lead screw (5) is horizontally and rotatably mounted between the two first lead screw supports (4), the first lead screw (5) penetrates through the two push plates (3) in a thread fit manner, a first motor (6) is fixedly mounted on one first lead screw support (4), and the output end of the first motor (6) is fixedly connected with the first lead screw (5);

horizontal ear plates (7) are fixedly arranged on the left side and the right side of the sliding plate (2), the ear plates (7) are in sliding fit with the bottom plate (1), and a loading mechanism (8) and a detection mechanism (9) are arranged on the ear plates (7); two guide rails (10) respectively positioned at the left side and the right side of the sliding plate (2) are horizontally and fixedly arranged on the upper surface of the bottom plate (1), the top surfaces of the guide rails (10) are horizontal planes, and the guide rails (10) are parallel to the first lead screw (5);

the loading mechanism (8) comprises a mounting plate (801) which is arranged on the upper surface of the lug plate (7) in a sliding mode along the left-right direction, two second lead screw supports (802) are fixedly arranged on the upper surface of the lug plate (7), a second lead screw (803) which is perpendicular to the first lead screw (5) is horizontally and rotatably arranged between the two second lead screw supports (802), the second lead screw (803) penetrates through the mounting plate (801) in a threaded matching mode, a second motor (804) is fixedly arranged on one of the second lead screw supports (802), and the output end of the second motor (804) is fixedly connected with the second lead screw (803); a horizontal connecting plate (805) is fixedly installed on the surface, facing the sliding plate (2), of the mounting plate (801), a horizontal sleeve plate (806) is sleeved on the end portion of the connecting plate (805), an opening is formed in the end face, facing the connecting plate (805), of the sleeve plate (806), the upper surface of the connecting plate (805) is attached to the top surface of the interior of the sleeve plate (806), two limiting columns (807) are vertically and fixedly installed in the sleeve plate (806), and the limiting columns (807) penetrate through the connecting plate (805) and are in sliding fit with the connecting plate (805); the supporting plate (808) is vertically and fixedly installed on the top surface of the sleeve plate (806), the rotating shaft (809) penetrating through the supporting plate (808) is installed on the supporting plate (808) in a horizontally rotating mode through a bearing, the cam block (810) is fixedly installed at one end, far away from the installation plate (801), of the rotating shaft (809), the gravity center of the cam block (810) is not overlapped with the axis of the rotating shaft (809), and the third motor (811) used for driving the rotating shaft (809) to rotate is fixedly installed on the installation plate (801).

2. The loading test device for the traction part of the coal mining machine according to claim 1, characterized in that: the equal fixed mounting of axis of rotation (809) towards the one end of mounting panel (801) and the output shaft tip of third motor (811) has disc (812), evenly seted up a plurality of holding tank (813) along its circumference on the periphery of disc (812), slidable mounting has slider (814) in holding tank (813), the driving tooth has been seted up on the outer terminal surface of slider (814), connect through hold-in range (815) between two disc (812) in same loading mechanism (8), the drive tooth cooperation of the outer terminal surface of slider (814) on hold-in range (815) and two disc (812).

3. The loading test device for the traction part of the coal mining machine according to claim 2, characterized in that: a bearing piece (816) is fixedly installed in the accommodating groove (813), a supporting spring (817) is fixedly connected between the bearing piece (816) and the inner end face of the sliding block (814), and a wedge block (818) is fixedly installed on the inner end face of the sliding block (814); the end face of the disc (812) is provided with a threaded rod (819) coinciding with the axis of the disc in a threaded matching mode, the inner end face of the threaded rod (819) is fixedly provided with a conical block (820), and the conical surface of the conical block (820) is attached to the inclined surface of the wedge-shaped block (818).

4. The loading test device for the traction part of the coal mining machine according to claim 1, characterized in that: the vertical fixed mounting of top surface of push pedal (3) has deflector (11) rather than being parallel to each other, and deflector (11) top surface is the arcwall face.

5. The loading test device for the traction part of the coal mining machine according to claim 1, characterized in that: the detection mechanism (9) comprises a sleeve (901) fixedly mounted on the upper surface of the ear plate (7), an elevator block (902) is vertically and fixedly mounted at the top of the sleeve (901), a telescopic spring (903) is vertically and fixedly connected between the bottom surface of the elevator block (902) and the bottom surface of the interior of the sleeve (901), a pressure sensor (904) is fixedly mounted on the inner wall of the sleeve (901), and an alarm (905) connected with the pressure sensor (904) is mounted on the outer wall of the sleeve (901); the top of the lifting block (902) is provided with a vertical lifting rod (906) in a thread fit mode, and the top of the lifting rod (906) is fixedly provided with a bearing plate (907).

6. The loading test device for the traction part of the coal mining machine according to claim 5, characterized in that: and a sealing ring (908) in sliding fit with the inner wall of the sleeve (901) is fixedly arranged at the edge of the bottom surface of the lifting block (902).

7. The loading test device for the traction part of the coal mining machine according to claim 1, characterized in that: horizontal groove (1001) have been seted up along its length direction to guide rail (10) top surface, and a plurality of vertical groove (1002) have evenly been seted up to horizontal groove (1001) bottom surface, and vertical slidable mounting has buffer beam (1003) in vertical groove (1002), fixedly connected with buffer spring (1004) between buffer beam (1003) bottom and vertical groove (1002) bottom surface, and the common fixed mounting in a plurality of buffer beam (1003) top has horizontally buffer board (1005).

8. The loading test device for the traction part of the coal mining machine according to claim 7, characterized in that: buffer board (1005) bottom surface fixed mounting has connecting rod (1006), connecting rod (1006) bottom fixed mounting has hemisphere piece (1007), hemisphere piece (1007) top surface and bottom surface are horizontal plane and hemisphere face respectively, the position that horizontal groove (1001) bottom surface corresponds hemisphere piece (1007) is vertical has seted up first spacing groove (1008), second spacing groove (1009) have been seted up to the lateral wall of first spacing groove (1008) improving level, stopper (1010) are installed to horizontal slip in second spacing groove (1009), stopper (1010) top surface edge is arc and stopper (1010) bottom surface is the horizontal plane, fixedly connected with spacing spring (1011) between stopper (1010) terminal surface and second spacing groove (1009) terminal surface, fixed mounting has driving lever (1012) on stopper (1012), driving lever (1012) outwards extend to on guide rail (10) lateral wall.