Coal mine fabric core flame-retardant conveyor belt electric cutter

Abstract

This invention discloses an electric cutting machine for flame-retardant fabric-core conveyor belts used in coal mines, belonging to the field of conveyor belt testing. The device includes a worktable connected to a cutting mechanism and a pressing mechanism. The pressing mechanism includes a pressing component and a pushing component; the pressing component and the pushing component are located on opposite sides of the cut. The pressing component is used to press and fix the conveyor belt, while the pushing component is used to push the cut conveyor belt away from the cut, thereby increasing the width of the cut. This invention splits the pressing mechanism into a pressing component and a pushing component, achieving an active cut widening function with one side fixed and the other side pushed away. This ensures that the blade does not make secondary contact with the cut surface during cutting and return, solving the problems of motor overload and blade breakage caused by blade clamping. It also eliminates damage such as burrs, tears, and peeling of the antistatic layer at the cut edge, ensuring the integrity of the cut surface of the test sample and providing a guarantee for the accuracy of subsequent flame-retardant performance testing.

Description

Technical Field

[0001] This invention relates to the field of conveyor belt testing, and in particular to an electric cutting machine for flame-retardant fabric core conveyor belts used in coal mines. Background Technology

[0002] Fabric core flame retardant conveyor belts are made by impregnating and plasticizing or vulcanizing an integral belt core with polyvinyl chloride impregnation paste. They are characterized by high strength, large carrying capacity, and balanced transportation. At the same time, this product has good flame retardant, antistatic, impact resistance, wear resistance, and corrosion resistance properties. Fabric core flame retardant conveyor belts are mainly suitable for underground transportation in coal mines, and can also be used for material transportation in the metallurgical and chemical industries.

[0003] According to the requirements of the "Coal Mine Safety Regulations" and the "Catalogue of Safety Equipment for Testing and Inspection in Coal Mines", new flame-retardant conveyor belts should be tested and inspected according to standards for their flame-retardant performance and anti-static performance before being put into use. Only after passing the test can they be put into use in the mine.

[0004] Testing flame-retardant conveyor belts requires cutting them into samples of a certain size. Existing flame-retardant conveyor belt sample preparation methods involve pressing the conveyor belt firmly and then using a reciprocating mechanism to drive the blades to reciprocate in order to cut the flame-retardant conveyor belt.

[0005] However, in existing cutting devices, the blade moves linearly to cut along the width of the conveyor belt. When cutting in this way, the cutting surface of the conveyor belt is always in close contact with the blade. On the one hand, this creates a continuous clamping force on both sides of the blade (i.e., the "blade clamping phenomenon"). This clamping force leads to a sharp increase in cutting resistance, motor overload, and the blade is prone to breakage due to lateral forces. On the other hand, because the cut edge is clamped tightly to the blade, the cutting surface will have burrs, tears, and other phenomena, and the surface conductive layer will be torn and peeled. These damages prevent the electrodes from contacting the real antistatic layer during surface resistance testing, resulting in abnormal test values, which seriously threatens the accuracy of coal mine safety inspection. Summary of the Invention

[0006] This invention provides an electric cutting machine for flame-retardant conveyor belts with fabric cores used in coal mines. By using a pushing component to push the cut conveyor belt away from the cut, it can solve the problems of blade clamping and burrs and tears on the cut surface that exist in the prior art when cutting conveyor belts, which affect the accuracy of detection.

[0007] The technical problem to be solved by this invention can be achieved through the following technical solution: An electric cutting machine for flame-retardant fabric-core conveyor belts used in coal mines includes a worktable connected to a cutting mechanism and a pressing mechanism. The cutting mechanism is used to cut along the width direction of the conveyor belt. The pressing mechanism includes a pressing component and a pushing component. The pressing component and the pushing component are located on opposite sides of the cut. The pressing component is used to press down and fix the conveyor belt, and the pushing component is used to push the cut conveyor belt away from the cut, thereby increasing the width of the cut and preventing the cut surface of the conveyor belt from contacting the blade.

[0008] As a preferred embodiment of the present invention, the pressing mechanism includes a telescopic device, the telescopic end of which is fixedly connected to a pressure plate, and both the pressing component and the pushing component are connected to the pressure plate.

[0009] As a preferred embodiment of the present invention, the pushing assembly includes a roller frame, a pressure roller rotatably connected to the roller frame, and a guide post fixedly connected to it; the guide post is movably inserted between the guide post and the pressure plate, and a compression spring is sleeved on the guide post; the roller frame is connected to an energy storage assembly that is driven by the pressure roller, which is used to press down on the conveyor belt by the pressure plate moving down and drive the energy storage assembly, thereby driving the pressure roller to rotate, so that the pressure roller pulls the cut conveyor belt away from the cut.

[0010] As a preferred embodiment of the present invention, the energy storage assembly includes a rack movably connected to the roller frame and a guide rod fixedly connected to the roller frame; one end of the pressure roller is fixedly connected to a driven wheel that meshes with the rack; the guide rod is movably connected to a connecting plate, and the upper end of the rack is fixedly connected to the connecting plate; the guide rod is fitted with an energy storage spring located above the connecting plate and a return spring located below the connecting plate, and the spring constant of the energy storage spring is greater than that of the return spring; the guide rod is movably connected to the pressure plate, which is used to compress the energy storage spring by the downward movement of the pressure plate, so that the energy storage spring generates potential energy to push the rack downward, so that the pressure roller has a tendency to pull the conveyor belt away from the cut.

[0011] As a preferred embodiment of the present invention, the number of the push-away components is multiple, and they are arranged in an array along the cutting direction.

[0012] As a preferred embodiment of the present invention, the worktable is slidably connected to a sliding plate, and the sliding plate corresponds to the position of the push-off component, which is used to support the conveyor belt through the sliding plate, so as to facilitate the pressure roller to pull the conveyor belt to move.

[0013] As a preferred embodiment of the present invention, an elastic element is connected between the sliding plate and the worktable. The stiffness coefficient of the elastic element is smaller than that of the energy storage spring, and it is used to drive the sliding plate to move and reset.

[0014] As a preferred embodiment of the present invention, the cutting mechanism includes a linear drive mechanism connected to the worktable and a sliding seat slidably connected to the worktable. The sliding seat is connected to a blade and is used to drive the sliding seat to move by the linear drive mechanism, thereby cutting the conveyor belt with the blade.

[0015] In a preferred embodiment of the present invention, the sliding seat is slidably connected to a vertically arranged blade fixing rod and rotatably connected to a rotating shaft, with the blade fixedly connected to the upper end of the blade fixing rod; the worktable is fixedly connected to a rack, one end of the rotating shaft is fixedly connected to a driven gear meshing with the rack, and the other end is provided with an eccentric shaft; the eccentric shaft is rotatably connected to a crank, the other end of the crank being hinged to the lower end of the blade fixing rod, for driving the rotating shaft to move through the sliding seat and causing the rotating shaft to rotate, thereby driving the blade fixing rod to move up and down reciprocally.

[0016] As a preferred embodiment of the present invention, the pressing assembly includes a pressing plate, and a plurality of connecting rods are fixedly connected to the pressing plate. The connecting rods are movably inserted between the pressing plate and the pressing plate, and a compression spring is sleeved on the connecting rod. By moving the pressing plate downward, the pressing plate presses down on the conveyor belt, and the compression spring is pressed down to compress it.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention uses a pressing component to press and fix the conveyor belt, and a pushing component to push the cut conveyor belt away from the cut, thereby increasing the width of the cut and preventing the cut surface of the conveyor belt from contacting the blade. This effectively avoids blade clamping and the occurrence of burrs, tears, and other phenomena on the cut surface, effectively improving the overall cutting quality and ensuring the accuracy of the inspection.

[0018] 2. This invention uses a sliding seat to drive the rotating shaft to move. The driven gear meshes with the spur rack, causing the rotating shaft to rotate. The eccentric shaft and crank at the end of the rotating shaft drive the blade fixing rod to move up and down reciprocally. This causes the blade to produce a composite motion of horizontal movement and vertical reciprocating motion, thus mimicking the manual cutting process. This helps to reduce the occurrence of fraying and separation of the fabric core from the covering layer when cutting the conveyor belt fabric core, ensuring the overall cutting quality and overall detection accuracy. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of the electric cutting machine for the flame-retardant conveyor belt with fabric core for coal mines provided by the present invention; Figure 2 for Figure 1 A structural diagram from a rear-view perspective; Figure 3 for Figure 1 A structural diagram viewed from below; Figure 4 for Figure 1 The front view; Figure 5 for Figure 4 Sectional view at point AA; Figure 6 for Figure 4 Sectional view at point BB; Figure 7 A structural schematic diagram of the pressure plate, the pressing assembly, and the pushing-away assembly; Figure 8 A schematic diagram of the worktable, sliding plate, and blade; Figure 9 This is a schematic diagram of the structure for pushing away the component; Figure 10 This is a structural diagram of the conveyor belt cutting process; Figure 11 for Figure 10 Top view; Figure 12 This is a schematic diagram of the sliding seat structure; Figure 13 for Figure 12 A structural diagram viewed from below; Figure 14 Exploded view of the blade, blade retaining rod, crank, and shaft.

[0020] Explanation of reference numerals in the attached figures: 1-Workbench, 2-Telescopic device, 3-Roller frame, 4-Pressure roller, 5-Sliding seat, 6-Conveyor belt, 101-Sliding plate, 102-Elastic element, 201-Pressure plate, 202-Lower pressure plate, 203-Connecting rod, 204-Compression spring II, 301-Guide post, 302-Compression spring I, 303-Rack, 304-Connecting plate, 305-Storage spring, 306-Reset spring, 307-Guide rod, 401-Driven wheel, 501-Blade, 502-Blade fixing rod, 503-Rotating shaft, 504-Straight rack, 505-Driven gear, 506-Eccentric shaft, 507-Crank. Detailed Implementation

[0021] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0022] Example 1 Before being put into use, flame-retardant fabric-core conveyor belts need to be cut into samples of specified sizes according to safety regulations for flame-retardant and anti-static performance testing. Existing cutting devices typically use a pressing mechanism to compress the conveyor belt, and then a motor drives the blades to move linearly along the width direction to complete the cutting.

[0023] However, this conventional cutting method has a serious technical flaw that significantly affects the accuracy of testing: during the cutting process, the cutting surface of the conveyor belt constantly presses against and squeezes the sides of the blade, creating a continuous "blade clamping" phenomenon. This phenomenon triggers a series of chain problems—the clamping force causes a sharp increase in cutting resistance, easily leading to motor overload and blade breakage due to lateral forces; simultaneously, the cut edge, due to continuous scraping and squeezing by the blade, will develop severe burrs, tears, and even cause the surface antistatic layer to crack and peel. These cutting damages prevent the electrodes from making uniform contact with the actual antistatic layer during surface resistance testing, resulting in abnormal test values, thus seriously threatening the accuracy and authority of coal mine safety testing.

[0024] like Figures 1 to 4 As shown, in order to solve the above-mentioned technical problems, the electric cutting machine for flame-retardant conveyor belts with fabric cores for coal mines provided in this embodiment of the invention includes a workbench 1. The workbench 1 is connected to a cutting mechanism and a pressing mechanism. The workbench 1 serves as a bearing base, and the conveyor belt 6 to be cut is laid flat on its upper surface. The cutting mechanism is used to cut along the width direction of the conveyor belt 6. The pressing mechanism includes a pressing component and a pushing component.

[0025] The pressing component and the pushing component are located on both sides of the slit (i.e. the cutting path). The pressing component is used to press down and fix the conveyor belt 6, and the pushing component is used to push the cut conveyor belt 6 away from the slit, thereby increasing the width of the slit and preventing the cut surface of the conveyor belt from contacting the blade.

[0026] Its working process and principle are as follows: Before cutting, the pressing mechanism descends as a whole, and the pressing component first presses the conveyor belt 6 firmly onto the worktable 1. At the same time or immediately afterward, the pushing component located on the other side of the cut also presses onto the conveyor belt 6. It should be noted that the pressing position of the pushing component is on the conveyor belt 6, which serves as the sample after cutting.

[0027] After the cutting mechanism cuts the conveyor belt 6, the push-away component immediately moves the side of the conveyor belt 6 that was just cut horizontally a preset distance away from the cut. This action actively increases the width of the cut, ensuring that the cut surface of the conveyor belt 6 is completely separated from the blade.

[0028] It should be emphasized that the core improvement of this embodiment lies in breaking away from the passive mode of traditional cutting where only pressure is applied without pushing. It creatively splits the pressing mechanism into a pressing component and a pushing component, achieving an active kerf widening function with one side fixed and the other pushing away. This improvement eliminates the conditions for blade clamping from a mechanical perspective, ensuring that the blade does not make secondary contact with the cutting surface during cutting and retraction. This completely solves the problems of motor overload and blade breakage caused by blade clamping. More importantly, it eliminates damage such as burrs, tears, and peeling of the antistatic layer at the kerf edge, ensuring the integrity and authenticity of the cut surface of the test sample and providing a fundamental guarantee for the accuracy of subsequent flame retardant performance testing.

[0029] It should be noted that the pressing mechanism includes a telescopic device 2, which can be an existing pneumatic cylinder or hydraulic cylinder, etc. The telescopic end of the telescopic device 2 is fixedly connected to a pressure plate 201. The pressing component and the pushing component are both connected to the pressure plate 201. The pressing component and the pushing component can press down and release the conveyor belt 6 by driving the pressure plate 201 to rise and fall through the telescopic device 2.

[0030] The cutting mechanism includes a linear drive mechanism connected to the worktable 1 and a sliding seat 5 slidably connected to the worktable 1. The linear drive mechanism can be a conventional lead screw module. The sliding seat 5 is slidably connected to the bottom of the worktable 1. The worktable 1 has a clearance slot. The sliding seat 5 is connected to a blade 501. The blade 501 extends upward through the clearance slot, thereby driving the sliding seat 5 to move through the linear drive mechanism. The blade 501 is used to cut the conveyor belt 6 laid on the worktable 1.

[0031] Example 2 Understandably, in the first embodiment, the pushing-away component needs to perform two actions: first, it descends with the pressing mechanism and presses the conveyor belt 6 tightly; second, it pushes the conveyor belt 6 to the side after cutting. If a separate drive device is configured for the pushing-away action, it will not only increase the equipment cost and complexity, but also require precise electrical control timing coordination with the cutting action, which will not only increase the overall manufacturing difficulty and cost, but also make it difficult to guarantee reliability.

[0032] To achieve the dynamic coupling of the aforementioned pressing and pushing actions, such as Figures 5 to 7 and Figure 9 As shown, this embodiment provides a mechanical energy-storing push-off assembly. The push-off assembly includes a roller frame 3, with a pressure roller 4 rotatably connected to the lower part of the roller frame 3 for pressing the conveyor belt 6. Vertical guide posts 301 are fixedly connected to the upper part of the roller frame 3. These guide posts 301 move upward and pass through the pressure plate 201, and compression springs 302 are sleeved on the guide posts 301. An energy-storing assembly is also connected to the roller frame 3 and is driven by the pressure roller 4. This energy-storing assembly can accumulate elastic potential energy when the pressure plate 201 is pressed down.

[0033] Since the accumulation of elastic potential is achieved by pressing down with the pressure plate 201, the energy storage component needs to receive the vertical force generated by the pressure plate 201. Since the axis of the pressure roller 4 is horizontal, the energy storage component needs to convert the vertical force of the pressure plate 201 into a force that drives the pressure roller 4 to rotate, i.e., to realize the process of converting linear motion into rotation. The most stable and direct transmission method is rack and pinion transmission. Therefore, the specific structure of the energy storage component in this embodiment is as follows: The energy storage assembly includes a rack 303 (which may be a cylindrical rack) that is movably connected to the roller frame 3, and a guide rod 307 that is fixedly connected to the roller frame 3. One end of the pressure roller 4 is fixedly connected to a driven wheel 401 (gear) that meshes with the rack 303. A connecting plate 304 is movably inserted into the guide rod 307, and the upper end of the rack 303 is welded to or fixedly connected to the connecting plate 304 by screws.

[0034] An energy storage spring 305 is fitted on the upper side of the connecting plate 304 on the guide rod 307, while a return spring 306 is fitted on the lower side of the connecting plate 304. The spring constant of the energy storage spring 305 is designed to be much larger than that of the return spring 306, so that after accumulating elastic potential energy, the energy storage spring 305 can smoothly push the connecting plate 304 downward. At the same time, the guide rod 307 and the rack 303 above the entire energy storage assembly are movably interlocked with the pressure plate 201.

[0035] Its working process is divided into two stages: Energy storage stage: such as Figure 5 and Figure 9 As shown, the pressing mechanism drives the pressure plate 201 to descend, and the pressure plate 201 pushes the roller frame 3 and the pressure roller 4 to descend together through the compression spring 302. When the pressure roller 4 contacts the conveyor belt 6, the pressure plate 201 continues to move downward, the compression spring 302 is compressed, and its elastic force presses the pressure roller 4 tightly against the surface of the conveyor belt, providing reliable positive pressure.

[0036] At this time, the pressure plate 201 continues to move downward, compressing the compression spring 302 and simultaneously pressing down on the energy storage spring 305. The energy storage spring 305 then transmits the force to the connecting plate 304. Since the conveyor belt 6 has not yet been cut, the side pressed down by the pressing component still exerts a constraint on the entire conveyor belt 6, preventing the pressure roller 4 from rotating. This means that the rack 303 and the connecting plate 304 cannot move downward, causing the pressure plate 201 to compress the energy storage spring 305 as it moves downward, thus allowing the energy storage spring 305 to accumulate elastic potential energy.

[0037] The energy storage spring 305 stores strong elastic potential energy and continuously applies a downward thrust to the connecting plate 304, causing the rack 303 to drive the driven wheel 401 to drive the pressure roller 4 to rotate away from the cutting slit.

[0038] During this stage, if the conveyor belt 6 is not laid flat before cutting, the pressure roller 4 will rotate and pull the conveyor belt 6, thus flattening the conveyor belt 6 and effectively keeping the cut surface neat and flat.

[0039] Release and push-away phase: such as Figure 6 and Figure 9 As shown, the conveyor belts 6 on both sides of the cut are physically separated the instant the cutting mechanism completes the cut. The conveyor belt 6 on the side pressed down by the push-away component loses its lateral constraint, and the elastic potential energy stored in the energy storage spring 305 is released, forcefully pushing the rack 303 downward. This, in turn, drives the pressure roller 4 on the surface of the conveyor belt 6 to roll away from the cut via the driven wheel 401, smoothly pushing the conveyor belt 6 away. The width of the cut increases accordingly, preventing issues such as blade jamming. After one cut is completed and the pressure plate 201 rises, the return spring 306 pushes the connecting plate 304 and the rack 303 back to their original positions, preparing for the next operation.

[0040] It should be emphasized that the core improvement of this embodiment lies in the construction of a purely mechanical pushing mechanism driven by spring compression and energy storage. The compression action is used as both the source and trigger of the pushing force. Without the need for an additional electronic control system and power source, the pushing action and the completion of cutting can be perfectly synchronized. The structure is compact and the operation is reliable.

[0041] It should be noted that, considering that the cutting action starts from one edge of the conveyor belt 6 and gradually moves towards the other side, if only one pressure roller 4 with a length that runs through the entire width of the conveyor belt 6 is used, then during the entire cutting process, the pressure roller 4 will not be able to effectively drive the part of the conveyor belt 6 that has not yet been cut to move to the side, so that the conveyor belt 6 that has been cut cannot be pushed away quickly. This will cause the cutting surface to be in close contact with the blade, and may still cause phenomena such as scratches on the cutting surface.

[0042] Therefore, such as Figure 4 and Figure 7 As shown, the number of push-away components is preferably multiple, arranged in an array along the cutting direction (i.e., the width direction of the conveyor belt 6). Thus, as... Figure 10 and Figure 11 As shown, as the cutting proceeds, the pressure roller 4 located in the cut area can immediately release its stored energy to push the corresponding conveyor belt segment away, without being affected by the pressure roller 4 in the uncut area. This achieves a segmented, real-time pushing effect, ensuring that the cut surface of the conveyor belt will not be clamped on the side of the blade 501, thus guaranteeing the overall quality of the cut surface.

[0043] In addition, such as Figure 6 and Figure 8As shown, the pressure roller 4 needs to drive the conveyor belt 6 to roll to one side under the drive of the energy storage spring 305. If the conveyor belt 6 is placed directly on the fixed surface of the worktable 1, the friction between the two will be great, especially when the conveyor belt is pressed down by the pressure roller 4 with a large positive pressure. This may hinder the smooth lateral movement of the conveyor belt 6, resulting in insufficient kerf width.

[0044] Therefore, this embodiment also optimizes the structure of the workbench 1. On the workbench 1, a sliding plate 101 is slidably connected to the area corresponding to the position of the push-off component. The workbench 1 can be provided with a recess, and the sliding plate 101 is located in the recess, so that the sliding plate 101 is flush with the upper surface of the workbench 1, thereby ensuring that the conveyor belt 6 can be laid flat on the workbench 1 and the sliding plate 101.

[0045] The sliding plate 101 can slide freely within the surface of the worktable 1 in a direction perpendicular to the cutting slit (i.e., the pushing direction). Specifically, the conveyor belt 6 to be cut is placed on the worktable 1, with the side pressed down by the pushing component lying flat on the sliding plate 101. When the pressure roller 4 drives the conveyor belt 6 to move laterally, the conveyor belt 6 no longer rubs directly against the surface of the worktable 1, but instead moves the sliding plate 101 along with it. The sliding plate 101 and the worktable 1 have a sliding fit, and its frictional resistance is much less than the frictional force between the rubber conveyor belt and the metal table surface, thus allowing the conveyor belt 6 to be pushed away easily and smoothly.

[0046] To ensure the sliding plate 101 automatically resets after unloading, an elastic element 102 connects the sliding plate 101 to the worktable 1. The elastic element 102 can be a conventional spring. After one cut is completed, the pressing mechanism is raised, and the pressure on the conveyor belt is removed. The sliding plate 101 automatically slides back to its initial position under the tension of the elastic element 102, preparing for the next cut. To ensure the correctness of the action logic, the stiffness coefficient of the elastic element 102 is designed to be much smaller than that of the energy storage spring 305, ensuring that during the release and pushing phase, the elastic force of the energy storage spring 305 can smoothly drive the pressure roller 4 to rotate, thus enabling the sliding plate 101 to slide synchronously.

[0047] Therefore, by setting a movable sliding plate 101 below the push-away area, the friction mode of the conveyor belt 6 during lateral movement is changed from rubber-metal sliding friction to plate-to-plate sliding friction, which greatly reduces the lateral movement resistance and ensures the efficiency and smoothness of the push-away action.

[0048] Furthermore, it is understandable that during the energy storage phase, the pressing mechanism needs to simultaneously drive both the fixed pressing component and the pushing component. Although these two components share a single pressure plate 201, their stroke and force requirements differ. The fixed pressing component needs to press the conveyor belt 6 before the pushing component, providing a fixed end for energy storage; while the energy storage spring 305 in the pushing component requires the pressure plate 201 to have sufficient additional pressing stroke to complete the compression and energy storage. If the pressure plate 201 is rigidly connected, it will not be able to meet the differentiated stroke requirements of these two components.

[0049] To solve the above-mentioned problems with motor coordination, such as Figures 5 to 7 As shown, the pressing assembly also adopts an elastic floating structure. The pressing assembly includes a pressing plate 202, on which several connecting rods 203 are fixedly connected. The connecting rods 203 movably pass through the pressing plate 201, and a compression spring 204 is sleeved on the connecting rod 203. The pressing plate 202 is located below the pressing plate 201.

[0050] The working process is as follows: When the pressure plate 201 descends, it first drives the lower pressure plate 202 to contact the conveyor belt 6. The pressure plate 201 continues to move downward, and after the lower pressure plate 202 presses the conveyor belt, it stops moving. The pressure plate 201 then compresses the compression spring 204 and continues to move downward. This additional downward stroke is used to drive the energy storage spring 305 in the push-off assembly to compress and store energy. In this way, through the stiffness matching and stroke distribution of the two independent elastic elements (compression spring 204 and energy storage spring 305), the timing and stroke requirements of first pressing and fixing and then compressing and storing energy are perfectly achieved.

[0051] By designing the pressing component as an elastic floating structure and allocating different spring strokes, a single pressing power source can drive the two actions of fixing and pressing and pushing away to store energy in an orderly and coordinated manner, thus ensuring the logical rigor and operational reliability of the entire pressing mechanism.

[0052] Example 3 It is understandable that the above embodiments mainly address the problem of avoiding cutting damage, but the quality of the cutting action itself is equally crucial. The internal structure of the fabric core flame-retardant conveyor belt includes a fabric fiber core layer. If a purely horizontal straight-line cutting method is used, the blade 501 acts on the material with only a single cutting action, which can easily pull the fabric fibers out of the rubber coating layer, causing the cut surface to fray or pill, or causing the coating layer to separate from the core layer, thereby affecting the accuracy of subsequent inspections.

[0053] To solve the above-mentioned cutting quality problems, such as Figure 12 , Figure 13 and Figure 14As shown, the cutting mechanism of this embodiment provides a composite motion cutting scheme. Specifically, a blade fixing rod 502 is vertically slidably connected to the sliding seat 5, and the blade 501 is fixedly installed on the upper end of the fixing rod. A rotating shaft 503 is also rotatably connected to the sliding seat 5. One end of the rotating shaft 503 is fixedly connected to a driven gear 505, and the other end is provided with an eccentric shaft 506. A rack 504 that meshes with the driven gear 505 is fixedly connected to the worktable 1. A crank 507 is rotatably connected to the eccentric shaft 506, and the other end of the crank 507 is hinged to the lower end of the blade fixing rod 502.

[0054] Its working process is as follows: When the linear drive mechanism drives the sliding seat 5 to move horizontally, the sliding seat 5 drives the rotating shaft 503 to move together. Since the driven gear 505 on the rotating shaft 503 meshes with the fixed spur rack 504, the driven gear 505 is forced to rotate while moving, thereby driving the rotating shaft 503 to rotate.

[0055] The rotation of the rotating shaft 503, through the eccentric shaft 506 and crank 507 at its end, drives the blade fixing rod 502 to perform high-frequency up-and-down reciprocating linear motion within the sliding seat 5. In this way, the blade 501 generates a horizontal feed motion and a vertical reciprocating sawing motion, the combined motion trajectory of which is a sawtooth-shaped composite path, perfectly mimicking the action of hand sawing.

[0056] It should be emphasized that the core improvement of this embodiment lies in the following: through the driven gear 505-spur rack 504 and eccentric shaft 506-crank 507 mechanism, the horizontal linear motion of the sliding seat 5 is cleverly decomposed into a composite motion of horizontal feeding and vertical reciprocating sawing of the blade 501. This achieves a simulated manual cutting through pure mechanical linkage, effectively reducing the fuzzing, fiber pull-out, and separation of the covering layer of the conveyor belt fabric core, significantly improving the flatness and smoothness of the cut surface, and ensuring the overall cutting quality and the accuracy of subsequent inspection.

[0057] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed application.

Claims

1. An electric cutting machine for flame-retardant fabric-core conveyor belts used in coal mines, characterized in that, It includes a worktable (1), which is connected to a cutting mechanism and a pressing mechanism. The cutting mechanism is used to cut along the width direction of the conveyor belt, and the pressing mechanism includes a pressing component and a pushing component. The pressing component and the pushing component are located on both sides of the cut. The pressing component is used to press down and fix the conveyor belt, and the pushing component is used to push the cut conveyor belt away from the cut, thereby increasing the width of the cut and preventing the cut surface of the conveyor belt from contacting the blade.

2. The electric cutting machine for flame-retardant conveyor belts with fabric cores for coal mines as described in claim 1, characterized in that, The pressing mechanism includes a telescopic device (2), and a pressure plate (201) is fixedly connected to the telescopic end of the telescopic device (2). The pressing component and the pushing component are both connected to the pressure plate (201).

3. The electric cutting machine for flame-retardant conveyor belts with fabric cores for coal mines as described in claim 2, characterized in that, The pushing assembly includes a roller frame (3), a pressure roller (4) rotatably connected to the roller frame (3), and a guide column (301) fixedly connected to it. The guide post (301) and the pressure plate (201) are interlocked, and the guide post (301) is fitted with a compression spring (302). The roller frame (3) is connected to an energy storage component that is connected to the pressure roller (4) for driving the conveyor belt by the pressure plate (201) moving down and the pressure roller (4) pressing down, and driving the energy storage component to drive the pressure roller (4) to rotate, so that the pressure roller (4) pulls the cut conveyor belt away from the cut.

4. The electric cutting machine for flame-retardant conveyor belts with fabric cores for coal mines as described in claim 3, characterized in that, The energy storage assembly includes a rack (303) that is movably connected to the roller frame (3) and a guide rod (307) that is fixedly connected to the roller frame (3); one end of the pressure roller (4) is fixedly connected to a driven wheel (401) that meshes with the rack (303). The guide rod (307) is movably inserted through the connecting plate (304), and the upper end of the rack (303) is fixedly connected to the connecting plate (304). The guide rod (307) is sleeved with an energy storage spring (305) located on the upper side of the connecting plate (304) and a return spring (306) located below the connecting plate (304). The spring constant of the energy storage spring (305) is greater than that of the return spring (306). The guide rod (307) is movably inserted between the pressure plate (201) and the pressure plate (201) to compress the energy storage spring (305) by moving the pressure plate (201) downward, so that the energy storage spring (305) generates potential energy to push the rack (303) downward, so that the pressure roller (4) has the tendency to pull the conveyor belt away from the cut.

5. The electric cutting machine for flame-retardant conveyor belts with fabric cores for coal mines as described in claim 4, characterized in that, The number of push-away components is multiple, and they are arranged in an array along the cutting direction.

6. The electric cutting machine for flame-retardant fabric-core conveyor belts in coal mines as described in claim 1 or 5, characterized in that, The workbench (1) is slidably connected to a sliding plate (101), and the sliding plate (101) corresponds to the position of the push-off component. It is used to support the conveyor belt through the sliding plate (101) so that the pressure roller (4) can pull the conveyor belt to move.

7. The electric cutting machine for flame-retardant fabric-core conveyor belts in coal mines as described in claim 6, characterized in that, An elastic element (102) is connected between the sliding plate (101) and the worktable (1). The spring coefficient of the elastic element (102) is smaller than that of the energy storage spring (305), and it is used to drive the sliding plate (101) to move and reset.

8. The electric cutting machine for flame-retardant conveyor belts with fabric cores for coal mines as described in claim 1, characterized in that, The cutting mechanism includes a linear drive mechanism connected to the worktable (1) and a sliding seat (5) slidably connected to the worktable (1). The sliding seat (5) is connected with a blade (501) for driving the sliding seat (5) to move through the linear drive mechanism and cutting the conveyor belt with the blade (501).

9. The electric cutting machine for flame-retardant conveyor belts with fabric cores for coal mines as described in claim 8, characterized in that, The sliding seat (5) is slidably connected to a vertically arranged blade fixing rod (502) and rotatably connected to a rotating shaft (503), and the blade (501) is fixedly connected to the upper end of the blade fixing rod (502); The workbench (1) is fixedly connected to a rack (504). One end of the rotating shaft (503) is fixedly connected to a driven gear (505) that meshes with the rack (504), and the other end is provided with an eccentric shaft (506). The eccentric shaft (506) is rotatably connected to a crank (507). The other end of the crank (507) is hinged to the lower end of the blade fixing rod (502) and is used to drive the rotating shaft (503) to move through the sliding seat (5) and make the rotating shaft (503) rotate, thereby driving the blade fixing rod (502) to move up and down reciprocally.

10. The electric cutting machine for flame-retardant conveyor belts with fabric cores for coal mines as described in claim 2, characterized in that, The pressing assembly includes a pressing plate (202), which is fixedly connected to several connecting rods (203). The connecting rods (203) are movably inserted between the pressing plate (201) and the pressing plate (201). The connecting rods (203) are fitted with compression springs (204). By moving the pressing plate (201) down, the pressing plate (202) presses down on the conveyor belt, and by pressing down on the compression springs (204), the conveyor belt is compressed.

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