CN219313734U

CN219313734U - Belt deviation preventing device of cutting machine

Info

Publication number: CN219313734U
Application number: CN202320044009.7U
Authority: CN
Inventors: 耿鹏; 曹江涛
Original assignee: Hebei Wanda Tyre Co Ltd
Current assignee: Hebei Wanda Tyre Co Ltd
Priority date: 2023-01-07
Filing date: 2023-01-07
Publication date: 2023-07-07
Anticipated expiration: 2033-01-07

Abstract

The utility model relates to a cutting machine belt prevents off tracking device, it includes the frame body, frame body both ends rotate and are connected with two live rollers, still install a plurality of hanging rollers of being connected with the frame body rotation on the frame body, be provided with the regulating roll parallel with the axial of live roller between hanging roller and the live roller; the belt deviation preventing device further comprises a driving piece and a photoelectric detection assembly, wherein the driving piece is used for driving the regulating roller to slide along the conveying direction, the photoelectric detection assembly is used for detecting whether the conveying belt deviates or not, the photoelectric detection assembly comprises two groups of infrared detectors which are symmetrically installed on the frame body on two sides of the conveying belt relative to the conveying belt, the two groups of infrared detectors are electrically connected with a controller, and the controller is electrically connected with the driving piece. According to the belt deviation correcting device, when the infrared detector detects the belt deviation, the controller controls the driving piece to drive the regulating roller to further tightly resist the conveying belt, so that the effect of correcting the conveying belt is achieved, and the cutting precision of the cutting machine is improved.

Description

Belt deviation preventing device of cutting machine

Technical Field

The application relates to the field of cutting machine equipment, in particular to a belt deviation preventing device of a cutting machine.

Background

Cutting machines are an indispensable device for some light industry. Conventionally, a cutting machine is a machine that performs punching of nonmetallic materials by pressing a die with the aid of the force of machine movement. Modern cutting machines have changed to begin using advanced techniques such as high pressure water jets, ultrasonic waves, etc. in leather cutting technology, but these devices are still included in cutting machine type devices.

In the related art, chinese patent publication No. CN215405270U discloses a cutting machine, which comprises a frame body and a conveyor belt connected to the frame body, wherein a fixing frame arranged in a door shape is connected to the frame body. The mount includes two montants of vertical fixed connection in the frame originally, fixed connection in the horizontal pole on two montant tops, sliding connection has the cutting knife on the horizontal pole. In the use process, the cloth is conveyed by the conveyor belt and cut.

In view of the above related art, the inventor considers that the numerical control cutting machine performs uninterrupted feeding by adopting a conveyor belt and a roller, the conveyor belt is offset in the feeding process, and then the conveyed material to be cut is offset to generate a position error, so that the cutting precision of the cutting machine is reduced.

Disclosure of Invention

In order to timely correct the conveyor belt which is deviated, the cutting accuracy of the cutting machine is improved, and the application provides a deviation preventing device for the belt of the cutting machine.

The application provides a cutting machine belt prevents off tracking device adopts following technical scheme:

the belt deviation preventing device of the cutting machine comprises a frame body, wherein two ends of the frame body are rotatably connected with two rotating rollers, and a conveying belt is connected between the two rotating rollers; the machine frame body is also provided with a plurality of hanging rollers which are rotationally connected with the machine frame body, the axial directions of the hanging rollers are parallel to the axial directions of the rotating rollers, the lower return stroke of the conveying belt is positioned above the hanging rollers and is in butt joint with the upper surfaces of the hanging rollers, and the upper surfaces of the hanging rollers are higher than the lower surfaces of the rotating rollers; an adjusting roller parallel to the axial direction of the rotating roller is arranged between the hanging roller and the rotating roller, and the roller surface of the adjusting roller is abutted with the lower surface of the lower return stroke of the conveying belt; the belt deviation preventing device further comprises a driving piece and a photoelectric detection assembly, wherein the driving piece is used for driving the regulating roller to slide along the conveying direction, the photoelectric detection assembly is used for detecting whether the conveying belt deviates or not, the photoelectric detection assembly comprises two groups of infrared detectors which are symmetrically installed on the frame body on two sides of the conveying belt relative to the conveying belt, the two groups of infrared detectors are electrically connected with a controller, and the controller is electrically connected with the driving piece.

Through adopting above-mentioned technical scheme, when infrared detector detects the belt off tracking, controller control driving piece drives the dancer roll and further supports tightly to the conveying belt, reaches the effect of rectifying to the conveying belt, has improved the cutting precision of cutting machine.

Optionally, the controller is connected with the time-recorder that is used for carrying out the timing to the time that the conveyer belt received infrared receiver infrared ray, the output of controller is connected with the alarm electricity.

Through adopting above-mentioned technical scheme, when conveyor belt blockked infrared receiver and received the infrared ray, the time-recorder begins the timing, if time-recorder timing time reaches the time of predetermineeing in the controller, the controller control alarm begins the warning, reminds on-the-spot staff through the alarm, has improved the timeliness that the staff found conveyor belt and have not rectified successfully for a long time.

Optionally, the first end and the second end of the adjusting roller in the axial direction are included, and the first end of the adjusting roller is rotationally connected with a first mounting seat; the second end of the regulating roller is rotationally connected with a second mounting seat rotationally connected with the frame body; the automatic adjusting device comprises a rack body, a first installation seat, a second installation seat, a sliding seat, a driving piece and an infrared distance meter, wherein the sliding rail is fixedly connected to the rack body, the lower surface of the first end, far away from the adjusting roller, of the first installation seat is rotationally connected with the sliding seat in sliding connection with the sliding rail, the infrared distance meter for detecting the sliding distance of the first installation seat is installed on the rack body, far away from the driving piece, of the sliding seat, the infrared distance meter emits infrared rays towards the sliding seat, and the infrared distance meter is electrically connected with a controller.

Through adopting above-mentioned technical scheme, when first mount pad slides in place, the infrared range finder sends the signal that detects to the controller, and the controller adjusts the state of driving piece to the convenience of controlling first mount pad slip maximum distance has been improved.

Optionally, each group of infrared detectors includes an infrared emitter and an infrared receiver, the infrared receivers are all electrically connected with the controller, and the infrared emitters are connected with an adjusting component for adjusting the positions of the infrared emitters.

Through adopting above-mentioned technical scheme, through the effect of adjusting the side interval of infrared transmitter and conveyer belt of adjusting the subassembly, be convenient for improve the suitability of infrared transmitter to conveyer belt of different width.

Optionally, the adjusting component comprises an adjusting plate fixedly connected with the frame body and extending along the width direction of the conveying belt, and the receiving range of the infrared receiver is not smaller than the area of the adjusting plate; the infrared emitter comprises an emitter main body and a fixed plate, a fourth sliding groove is formed in the adjusting plate, a fourth sliding block is fixedly connected to the fixed plate, and the fourth sliding block is in sliding connection with the fourth sliding groove; the mounting hole that extends along the length direction of regulating plate has been seted up to the regulating plate lower surface, the locking hole of rectangular shape, with fourth spout intercommunication has been seted up to the regulating plate side, peg graft in the locking hole have be used for with locking hole homonymy fourth slider threaded connection's locking bolt.

Through adopting above-mentioned technical scheme, locking bolt pass locking hole after with locking hole homonymy fourth slider threaded connection to stability after the fixed plate is adjusted has been improved.

Optionally, a scale is fixedly connected to the adjusting plate on the same side of the mounting hole.

Through adopting above-mentioned technical scheme, when adjusting infrared transmitter's position, the interval of infrared transmitter and conveyer is known to the numerical value of accessible observation scale, has improved the accuracy of adjusting infrared transmitter position.

Optionally, the spout on the slide rail includes first spout, second spout and third spout, and first spout, second spout and third spout distribute from top to bottom, and the slider on the slide includes first slider, second slider and third slider with third spout sliding connection with first spout sliding connection.

By adopting the technical scheme, the sliding state of the sliding seat in the sliding process along the sliding rail can be more stable.

Optionally, the upper surface of slide rail rotates and is connected with the ball, and the ball butt with the lower surface of slide.

By adopting the technical scheme, the friction force of the sliding seat in the sliding process along the sliding rail is reduced, and the sliding fluency of the sliding seat is improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the infrared detector detects that the belt is deviated, the controller controls the driving piece to drive the adjusting roller to further tightly press the conveying belt, so that the deviation correction effect of the conveying belt is achieved, and the cutting precision of the cutting machine is improved;

2. when the infrared receiver is blocked by the conveyor belt to receive infrared rays, the timer starts to count, if the count time of the timer reaches the preset time in the controller, the controller controls the alarm to start alarming, and the on-site staff is reminded by the alarm, so that timeliness of the staff finding that the conveyor belt is successful in long-time unbiasing is improved;

3. when the first mounting seat slides in place, the infrared range finder sends the detected electric signal to the controller, and the controller adjusts the state of the driving piece, so that the convenience of controlling the sliding maximum distance of the first mounting seat is improved.

Drawings

Fig. 1 is a schematic structural view of a belt deviation preventing device according to an embodiment of the present application.

Fig. 2 is an enlarged view at a in fig. 1.

Fig. 3 is a block diagram of a belt deviation prevention device control system according to an embodiment of the present application.

Fig. 4 is a schematic diagram of a dancer roll configuration embodying an embodiment of the present application.

Fig. 5 is a schematic view showing a slider structure according to an embodiment of the present application.

FIG. 6 is a schematic diagram of an infrared emitter structure embodying an embodiment of the present application.

Reference numerals illustrate: 1. a frame body; 11. a rotating roller; 12. a hanging roller; 13. a slide rail; 131. a first chute; 132. a second chute; 133. a third chute; 134. a ball; 2. a conveyor belt; 3. an adjusting roller; 31. a first mount; 32. a second mounting base; 33. a slide; 331. a first slider; 332. a second slider; 333. a third slider; 4. a cylinder; 5. a controller; 51. an infrared receiver; 52. a control valve; 53. an infrared range finder; 54. a timer; 55. an alarm; 6. an adjusting plate; 61. a fourth chute; 62. a mounting hole; 63. a locking hole; 64. a graduated scale; 7. an infrared emitter; 71. an emitter body; 72. a fixing plate; 721. a fourth slider; 8. a locking bolt.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-6.

The embodiment of the application discloses a cutting machine belt prevents off tracking device. Referring to fig. 1, a belt deviation preventing device of a cutting machine comprises a frame body 1, two rotating rollers 11 are rotatably connected to two ends of the frame body 1, a conveyor belt 2 is connected between the two rotating rollers 11, a cutting assembly is arranged at one end of the frame body 1, materials to be cut are conveyed through the conveyor belt 2, and the cutting assembly cuts the materials to be cut.

Referring to fig. 1 and 2, a plurality of hanging rollers 12 are further mounted on the frame body 1, the hanging rollers 12 are rotatably connected with the frame body 1, the axial directions of the hanging rollers 12 and the axial directions of the rotating rollers 11 are parallel to each other, the lower return stroke of the conveying belt 2 is located above the hanging rollers 12 and is abutted to the upper surfaces of the hanging rollers 12, and the upper surfaces of the hanging rollers 12 are higher than the lower surfaces of the rotating rollers 11. In the present embodiment, the number of the hanging rollers 12 is two.

The belt deviation preventing device comprises a regulating roller 3, wherein the regulating roller 3 is positioned between a hanging roller 12 and a rotating roller 11, the axial direction of the regulating roller 3 is parallel to the axial direction of the rotating roller 11, the roller surface of the regulating roller 3 is abutted with the lower surface of the lower return stroke of the conveying belt 2, and the upper surface of the regulating roller 3 is higher than the lower surface of the rotating roller 11.

Referring to fig. 3 and 4, the belt deviation preventing device further includes a driving member for driving the steering roller 3 to slide in the conveying direction, and in this embodiment, the driving member is a cylinder 4. The belt deviation preventing device further comprises a photoelectric detection assembly for detecting whether the conveyor belt 2 deviates or not, the photoelectric detection assembly comprises two groups of infrared detectors, the two groups of infrared detectors are symmetrically installed on the frame body 1 on two sides of the conveyor belt 2 relative to the conveyor belt 2, the two groups of infrared detectors are electrically connected with the controller 5, and the controller 5 is electrically connected with the driving piece.

When the infrared detector detects the belt deviation, the controller 5 controls the driving piece to drive the regulating roller 3 to further tightly support the conveying belt 2, so that the effect of correcting the deviation of the conveying belt 2 is achieved, and the cutting precision of the cutting machine is improved.

Referring to fig. 1 and 2, the dancer roller 3 includes first and second ends in an axial direction, the first end of the dancer roller 3 is connected with a first mount 31, and the first end of the dancer roller 3 is rotatably connected with the first mount 31. Referring to fig. 1 and 4, a second mounting seat 32 is rotatably connected to the second end of the dancer roll 3, and the second mounting seat 32 is rotatably connected to the frame body 1. The cylinder 4 is fixedly connected with the frame body 1, and the telescopic end of the cylinder 4 is hinged with the end face of the first mounting seat 31, which is close to the hanging roller 12, in a ball mode.

Referring to fig. 2, a slide rail 13 is fixedly connected to the frame body 1, and a sliding seat 33 is rotatably connected to a lower surface of the first end of the first mounting seat 31, which is far away from the adjustment roller 3. The side of the sliding rail 13 is provided with a plurality of sliding grooves extending along the length direction of the sliding rail 13, the sliding seat 33 comprises sliding blocks which are respectively connected with the sliding grooves on the sliding rail 13 in a sliding manner, and the sliding blocks extend along the length direction of the sliding seat 33.

Referring to fig. 1 and 4, when the air cylinder 4 is started, the air cylinder 4 drives the first end of the adjustment roller 3 to slide along the length direction of the slide rail 13, the second end of the adjustment roller 3 rotates through the second mounting seat 32, the adjustment roller 3 comprises a rotating shaft penetrating through the roller body, and the rotating shaft of the adjustment roller 3 cannot be separated from the first mounting seat 31 or the second mounting seat 32 in the displacement process of the adjustment roller 3.

Referring to fig. 3 and 5, each set of infrared detectors includes an infrared emitter 7 and an infrared receiver 51, the infrared emitter 7 being positioned above the infrared receiver 51 such that the infrared emitter 7 emits infrared rays downward, the infrared receiver 51 being electrically connected to the controller 5.

When the infrared rays emitted by the two infrared emitters 7 are received by the corresponding infrared receivers 51, the conveyor belt 2 is in an unbiased state; when the conveyor belt 2 deflects towards one of the infrared detector sides, the conveyor belt 2 blocks the infrared rays of the side, so that the infrared receiver 51 of the side cannot normally receive the infrared rays emitted by the corresponding infrared emitter 7, at this time, the controller 5 starts the air cylinder 4 through the control valve 52, so that the air cylinder 4 starts to stretch and push the sliding seat 33 to slide towards the side far away from the hanging roller 12, and the adjusting roller 3 can further tightly support the conveyor belt 2, thereby achieving the effect of correcting the deviation of the conveyor belt 2 and improving the cutting precision of the cutting machine.

In this embodiment, the number of the sliding grooves on the sliding rail 13 is three, the sliding grooves on the sliding rail 13 include a first sliding groove 131, a second sliding groove 132 and a third sliding groove 133, the first sliding groove 131, the second sliding groove 132 and the third sliding groove 133 are vertically distributed, and the sliding blocks on the sliding base 33 include a first sliding block 331 slidably connected with the first sliding groove 131, a second sliding block 332 slidably connected with the second sliding groove 132 and a third sliding block 333 slidably connected with the third sliding groove 133, so that the sliding state of the sliding base 33 can be more stable in the sliding process along the sliding rail 13.

The upper surface of slide rail 13 rotates and is connected with ball 134, and ball 134 and the lower surface butt of slide 33 to reduce the frictional force of slide 33 in the sliding process along slide rail 13, improved the slip smoothness of slide 33.

The infrared range finder 53 for detecting the sliding distance of the first mounting seat 31 is mounted on the frame body 1, which is far away from the cylinder 4, of the sliding seat 33, the infrared range finder 53 emits infrared rays towards the sliding seat 33, the infrared range finder 53 is electrically connected with the controller 5, when the first mounting seat 31 slides in place, the infrared range finder 53 sends detected electric signals to the controller 5, and the controller 5 controls the cylinder 4 to stop continuously stretching through the control valve 52, so that convenience for controlling the sliding maximum distance of the first mounting seat 31 is improved.

The controller 5 is further electrically connected with a timer 54 for timing the time of the conveyor belt 2 blocking the infrared receiver 51 from receiving infrared rays, the output end of the controller 5 is electrically connected with an alarm 55, and the alarm 55 is installed on the frame body 1. In this embodiment, the alarm 55 is an audible and visual alarm 55.

When the conveyor belt 2 blocks the infrared receiver 51 from receiving infrared rays, the timer 54 starts to count, if the count time of the timer 54 reaches the preset time in the controller 5, the controller 5 controls the alarm 55 to start alarming, and the on-site staff is reminded through the alarm 55, so that timeliness of the staff finding that the conveyor belt 2 is not corrected successfully for a long time is improved.

Referring to fig. 5 and 6, the infrared emitter 7 is connected with an adjusting assembly for adjusting the position of the infrared emitter 7, the adjusting assembly includes an adjusting plate 6 fixedly connected with the frame body 1, the adjusting plate 6 extends along the width direction of the conveyor belt 2, and the receiving range of the infrared receiver 51 is not smaller than the area of the adjusting plate 6. The infrared emitter 7 includes emitter main part 71 and fixed plate 72, and fixed plate 72 and regulating plate 6 sliding connection for fixed plate 72 can slide along regulating plate 6, reaches the effect of adjusting infrared emitter 7 and conveyer belt 2's side interval, is convenient for improve the suitability of infrared emitter 7 to conveyer belt 2 of different width.

The adjusting plate 6 is provided with a fourth sliding groove 61, the fixing plate 72 is fixedly connected with a fourth sliding block 721, and the fourth sliding block 721 is in sliding connection with the fourth sliding groove 61. The lower surface of the adjusting plate 6 is provided with a mounting hole 62, the mounting hole 62 extends along the length direction of the adjusting plate 6, and the emitter body 71 protrudes from the lower surface of the adjusting plate 6 toward the infrared receiver 51 side after passing through the mounting hole 62 of the adjusting plate 6. The locking hole 63 of rectangular shape has been seted up to regulating plate 6 side, and locking hole 63 and fourth spout 61 intercommunication have been inserted locking bolt 8 in locking hole 63, locking bolt 8 pass locking hole 63 after with the fourth slider 721 threaded connection of locking hole 63 homonymy to stability after the fixed plate 72 is adjusted has been improved.

The adjusting plate 6 on the same side of the mounting hole 62 is fixedly connected with a graduated scale 64, and when the position of the infrared emitter 7 is adjusted, the distance between the infrared emitter 7 and the conveyor belt 2 can be known by observing the numerical value of the graduated scale 64, so that the accuracy of adjusting the position of the infrared emitter 7 is improved.

The implementation principle of the belt deviation preventing device of the cutting machine is as follows: the material to be cut is conveyed through the conveying belt 2, and the cutting assembly cuts the material to be cut.

When the conveyor belt 2 deflects towards one of the infrared detector sides, the conveyor belt 2 blocks the infrared rays of the side, so that the infrared receiver 51 of the side cannot normally receive the infrared rays emitted by the corresponding infrared emitter 7, at this time, the controller 5 starts the air cylinder 4 through the control valve 52, so that the air cylinder 4 starts to stretch and push the sliding seat 33 to slide towards the side far away from the hanging roller 12, and the adjusting roller 3 can further abut against the conveyor belt 2, so that the correction effect of the conveyor belt 2 is achieved.

When the conveyor belt 2 blocks the infrared receiver 51 from receiving infrared rays, the timer 54 starts to count, and if the count time of the timer 54 reaches the preset time in the controller 5, the controller 5 controls the alarm 55 to start alarming, and the alarm 55 reminds the on-site staff.

The fixed plate 72 is slidably connected with the adjusting plate 6, so that the fixed plate 72 can slide along the adjusting plate 6, and the effect of adjusting the lateral distance between the infrared emitter 7 and the conveyor belt 2 can be achieved.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. The utility model provides a cutting machine belt prevents off tracking device which characterized in that: the machine comprises a machine frame body (1), wherein two ends of the machine frame body (1) are rotatably connected with two rotating rollers (11), and a conveying belt (2) is connected between the two rotating rollers (11); the machine frame comprises a machine frame body (1), and is characterized in that a plurality of hanging rollers (12) which are rotationally connected with the machine frame body (1) are further arranged on the machine frame body (1), the axial direction of each hanging roller (12) is parallel to the axial direction of each rotating roller (11), the lower return stroke of the conveying belt (2) is positioned above each hanging roller (12) and is abutted to the upper surface of each hanging roller (12), and the upper surface of each hanging roller (12) is higher than the lower surface of each rotating roller (11); an adjusting roller (3) parallel to the axial direction of the rotating roller (11) is arranged between the hanging roller (12) and the rotating roller (11), and the roller surface of the adjusting roller (3) is abutted with the lower surface of the lower return stroke of the conveying belt (2); the belt deviation preventing device further comprises a driving piece and a photoelectric detection assembly, wherein the driving piece is used for driving the regulating roller (3) to slide along the conveying direction, the photoelectric detection assembly is used for detecting whether the conveying belt (2) deviates, the photoelectric detection assembly comprises two groups of infrared detectors which are symmetrically installed on the frame body (1) on two sides of the conveying belt (2) relative to the conveying belt (2), the two groups of infrared detectors are electrically connected with a controller (5), and the controller (5) is electrically connected with the driving piece.

2. The belt deviation preventing device for a cutting machine according to claim 1, wherein: the controller (5) is electrically connected with a timer (54) for timing the time of the infrared receiver (51) receiving infrared rays by the conveyor belt (2), and the output end of the controller (5) is electrically connected with an alarm (55).

3. A cutting machine belt deviation preventing device according to claim 1 or 2, characterized in that: the adjusting roller (3) comprises a first end and a second end in the axial direction, and the first end of the adjusting roller (3) is rotatably connected with a first mounting seat (31); the second end of the regulating roller (3) is rotationally connected with a second mounting seat (32) rotationally connected with the frame body (1); fixedly connected with slide rail (13) on frame body (1), the lower surface rotation that first mount pad (31) kept away from the first end of dancer roll (3) be connected with slide (33) of slide rail (13) sliding connection, install on frame body (1) that slide (33) kept away from driving piece one side and be used for detecting infrared range finder (53) of first mount pad (31) sliding distance, infrared range finder (53) are towards slide (33) transmission infrared ray, infrared range finder (53) are connected with controller (5) electricity.

4. The belt deviation preventing device for a cutting machine according to claim 1, wherein: each group of infrared detectors comprises an infrared emitter (7) and an infrared receiver (51), the infrared receivers (51) are electrically connected with the controller (5), and the infrared emitter (7) is connected with an adjusting component for adjusting the position of the infrared emitter (7).

5. The belt deviation preventing apparatus of claim 4, wherein: the adjusting assembly comprises an adjusting plate (6) fixedly connected with the frame body (1) and extending along the width direction of the conveying belt (2), and the receiving range of the infrared receiver (51) is not smaller than the area of the adjusting plate (6); the infrared emitter (7) comprises an emitter main body (71) and a fixed plate (72), a fourth sliding groove (61) is formed in the adjusting plate (6), a fourth sliding block (721) is fixedly connected to the fixed plate (72), and the fourth sliding block (721) is in sliding connection with the fourth sliding groove (61); the installation hole (62) extending along the length direction of the adjusting plate (6) is formed in the lower surface of the adjusting plate (6), the side surface of the adjusting plate (6) is provided with a strip-shaped locking hole (63) communicated with a fourth sliding groove (61), and a locking bolt (8) which is used for being in threaded connection with a fourth sliding block (721) on the same side as the locking hole (63) is inserted into the locking hole (63).

6. The belt deviation preventing apparatus of claim 5, wherein: and a graduated scale (64) is fixedly connected to the adjusting plate (6) on the same side of the mounting hole (62).

7. A cutting machine belt deviation prevention apparatus as defined in claim 3, wherein: the sliding grooves on the sliding rail (13) comprise a first sliding groove (131), a second sliding groove (132) and a third sliding groove (133), the first sliding groove (131), the second sliding groove (132) and the third sliding groove (133) are distributed up and down, and the sliding blocks on the sliding seat (33) comprise a first sliding block (331) which is in sliding connection with the first sliding groove (131), a second sliding block (332) which is in sliding connection with the second sliding groove (132) and a third sliding block (333) which is in sliding connection with the third sliding groove (133).

8. The cutting machine belt deviation preventing device according to claim 7, wherein: the upper surface of the sliding rail (13) is rotatably connected with a ball (134), and the ball (134) is abutted with the lower surface of the sliding seat (33).