Multi-V belt cutting machine

Abstract

The present invention provides a multi-V belt cutting machine, comprising a fixed bracket, a supporting roller, a guide roller, a cutting knife, and a tensioning roller, wherein one end of the supporting roller is mounted on the fixed bracket, the guide roller, the tensioning roller and the supporting roller are axially arranged in parallel, a driving device and a tensioning device are mounted on the fixed bracket, the driving device is connected to the guide roller, and drives the guide roller to move in a direction perpendicular to the axis of the supporting roller, the tensioning device is connected to one end of the tensioning roller, and drives the tensioning roller to move in a direction perpendicular to the axis of the supporting roller, and the tensioning roller can rotate relative to the tensioning device, and the outer circumferential surface of the guide roller is provided with teeth distributed in sections along the axis of the guide roller, thereby reducing the phenomenon of multiple wedges, insufficient wedges or half wedges when cutting the multi-V belt.

Description

Technical Field

[0001] The invention relates to a cutting machine for a multi-V belt, in particular to a cutting machine for a molded multi-V belt. Background Art

[0002] A molded multi-V belt is a type of wedge or rib formed on the surface of a multi-V belt by extruding the teeth inside a mold without the need for grinding, which reduces dust in the workshop and the generation of waste. It is a production method that has been widely used in recent years. The specific molding process can be found in the U.S. patent document with a publication date of January 21, 2014 and a publication number of US8632650B2. The patent discloses a molded multi-V belt with a wedge surface fabric. However, regardless of whether the surface of the multi-V belt is covered with fabric, the molded rubber sleeve already has a formed wedge on the surface. Since the rubber sleeve is relatively wide, the wedge-carrying rubber sleeve needs to be cut according to the required number of wedges or width, such as 3PK, 4PK, 5PK and other multi-V belts with different widths, thereby forming a single multi-V belt for driving various equipment, such as automotive accessory systems.

[0003] During the cutting process of molded multi-V belts, it is often necessary to tension and fix the rubber sleeve first. The current cutting method is to turn the wedge of the rubber sleeve outward, put the entire rubber sleeve on the cutting shaft, and then expand the cutting shaft to tension the rubber sleeve. Then, a guide roller with an outer surface completely covered with teeth is used. The teeth on the guide roller are formed by protrusions and grooves. The wedge of the rubber sleeve corresponds to the groove of the guide roller or the wedge groove of the rubber sleeve corresponds to the protrusion of the guide roller. The guide roller presses the rubber sleeve to the support roller so that the support roller and the guide roller clamp the rubber sleeve to fix the rubber sleeve. At the same time, when the rubber sleeve rotates, the protrusion or groove on the guide roller engages with the groove or wedge on the rubber sleeve, and then the tool is moved to cut along the wedge groove according to a predetermined width. However, in actual applications, it is found that the cut multi-V belts often have multiple wedges, fewer wedges or half wedges, which causes the multi-V belts to be scrapped. It is urgent to provide a technology to solve this problem. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a multi-V belt cutting machine, comprising a fixed bracket, a support roller, a guide roller, a cutter, and a tensioning roller, one end of the support roller is installed on the fixed bracket, the guide roller and the tensioning roller are axially arranged in parallel with the support roller, a driving device and a tensioning device are installed on the fixed bracket and move relative to the fixed bracket, the driving device is connected to the guide roller, and drives the guide roller to move in a direction perpendicular to the axis of the support roller, the tensioning device is connected to one end of the tensioning roller, and drives the tensioning roller to move in a direction perpendicular to the axis of the support roller, and the tensioning roller can rotate relative to the tensioning device, and teeth distributed in sections along the axis of the guide roller are arranged on the outer circumferential surface of the guide roller.

[0005] It also includes a slide rail installed on a fixed bracket along an axis parallel to the support roller and a tool holder movable along the slide rail. The cutter is rotatably fixed on the tool holder and can move in a direction perpendicular to the axis of the support roller.

[0006] It also includes a screw rod which is arranged on a fixed bracket and is parallel to the slide rail, and a sliding block located in the tool holder. The screw rod is connected to a motor, and the motor drives the screw rod to rotate and then drives the tool holder to move along the slide rail.

[0007] The cutter is one or more cutters arranged in parallel and spaced apart.

[0008] It also includes a support mechanism, wherein the support mechanism can selectively support the other end of the support roller.

[0009] The supporting mechanism is a telescopic structure.

[0010] The supporting mechanism is a sliding mechanism.

[0011] The support roller has a surface covered with rubber.

[0012] The tensioning device is a rotating mechanism, and the rotating mechanism drives the tensioning roller to rotate in a direction perpendicular to the axis of the supporting roller.

[0013] Also included is a tensioning support, the tensioning support optionally supporting the other end of the tensioning roller,

[0014] The driving device is a telescopic structure.

[0015] Also included is a door of the protection device, which is closed during cutting and opened after cutting stops.

[0016] The cutting machine of the present invention can avoid the tooth jumping phenomenon caused by the cumulative increase of tolerance when the protrusion or groove of the entire guide roller meshes with the groove or wedge on the rubber sleeve due to a certain difference in precision between the guide roller and the rubber sleeve, reduce the phenomenon of extra wedges, insufficient wedges or half wedges during cutting, and reduce the scrap rate of the multi-V belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of a multi-V belt cutting machine;

[0018] Figure 2 It is a schematic diagram of the guide roller structure of the multi-V belt cutting machine;

[0019] Figure 3 This is a statistical table of scrap rates for cutting multi-V belts.

[0020] In the figure:

[0021] 1. Fixed bracket; 2. Support roller; 3. Cutter; 4. Tensioning device; 5. Rubber sleeve; 6. Tensioning roller; 7. Multi-V belt; 8. Guide roller; 9. Driving device; 10. Support mechanism; 11. Slide rail; 12. Screw rod; 13. Knife holder; 14. Tensioning support; 15. Sliding mechanism; 16. Teeth; 17. Smooth surface. DETAILED DESCRIPTION

[0022] The present invention will be described in detail below with reference to the accompanying drawings.

[0023] Figure 1 The schematic diagram of the structure of the multi-V belt cutting machine is shown in FIG. The multi-V belt cutting machine includes a fixed bracket 1, which has a base and two side surfaces. One end of the support roller 2 is mounted on one side surface of the fixed bracket 1, and the other end is suspended to facilitate the rubber sleeve 5 to be put on it. The tensioning roller 6 and the guide roller 8 are arranged parallel to the axis of the support roller 2. The end of the tensioning roller 6 close to the fixed end of the support roller is connected to the tensioning device 4, and the other end is suspended in the same way as the support roller 2 to facilitate the installation of the rubber sleeve 5. The tensioning device 4 is connected to the fixed bracket 1 in a movable manner. The movement of the tensioning device 4 can be a rotational movement, and the rotation mechanism drives the tensioning roller 6 to move in a direction perpendicular to the axis of the support roller. Alternatively, the tensioning device can also be a sliding structure. During operation, the tensioning device 4 drives the tensioning roller 6 away from the support roller in a direction perpendicular to the axis of the support roller to tension the rubber sleeve 5, and the tensioning roller can rotate relative to the tensioning device 4 to drive the rubber sleeve to rotate for easy cutting.

[0024] The cutter cuts along the bottom of the groove of the wedge on the rubber sleeve 5. The cutter can be manual or automatic. The multi-V belt cutting machine with an automatic cutter also includes a slide rail 11 and a tool holder 13 that slides left and right along the slide rail 11. The slide rail 11 is arranged parallel to the support roller 2 and is fixedly installed on the other side of the fixed bracket 1. In order to improve the stability of the movement of the tool holder 13, two slide rails 11 are arranged up and down along the tool holder 13. A screw rod 12 is arranged parallel to the slide rail 11. A slider that cooperates with the screw rod 12 is arranged in the tool holder 13. The rotation of the screw rod 12 drives the tool holder 13 to move left and right along the slide rail 11. The screw rod 12 is connected to the motor, and the motor drives the screw rod to rotate. The motor is connected to a PLC controller (not shown), and the operation of the motor is controlled by the PLC controller. The cutter 3 is rotatably installed on the tool holder 13. When cutting, the cutter moves along the axis perpendicular to the support roller 2. The cutter 3 moves to the rubber sleeve 1 to cut the rubber sleeve 1. The cutter 3 may be composed of more than one parallel blades, and the width of the interval between the blades and the large piece is set according to the width of the poly-V belt 7. Multiple poly-V belts 7 can be cut at one time, thereby improving the cutting efficiency of the poly-V belt 7.

[0025] The driving device 9 is fixed on the fixed bracket 1 in a movable manner. The guide roller 8 is connected to the driving device 9 and driven by the driving device 9 to move in a direction perpendicular to the axis of the support roller 2. When working, the driving device 9 forces the guide roller 8 to move toward the support roller 2 to the support roller 2, and cooperates with the support roller 2 to press the rubber sleeve 5 to prevent the rubber sleeve 5 from moving. The driving device 9 can adopt a telescopic structure, such as a telescopic cylinder or a telescopic slide rod to achieve the guide roller 8 leaving or moving to the support roller 2. The outer circumferential surface of the guide roller 8 is provided with teeth 16 formed by alternating protrusions and grooves. Since the outer surface of the rubber sleeve 1 of the molded multi-V belt has alternatingly arranged wedges and wedge grooves, the protrusions on the guide roller 8 cooperate with the wedge grooves on the rubber sleeve 1 and the grooves on the guide roller 8 cooperate with the wedges on the rubber sleeve 1, which play a certain guiding and fixing role in the rotation of the rubber sleeve 1, and prevent the rubber sleeve 1 from moving left and right when rotating.

[0026] The outer circumferential surface of the guide roller 8 is also provided with a smooth surface 17 without teeth 16, and the smooth surface 17 and the teeth 16 are alternately distributed along the axis of the guide roller 8, that is, the teeth 16 on the guide roller 8 do not completely cover the entire outer surface of the guide roller, but are distributed in sections along the axis of the guide roller 8. For example, the teeth 16 can be arranged in four sections according to the length of the shaft, occupying half of the total length of the guide roller 8, but it is not limited thereto, and the width and spacing of the teeth 16 on guide rollers of different lengths can be adjusted according to specific conditions.

[0027] The teeth 16 of the guide roller 8 are arranged in sections, and each section of teeth 16 is sufficient to ensure that the rubber sleeve 1 can be well fixed when rotating. Secondly, the area corresponding to each section of teeth is cut, because the displacement of this section of the rubber sleeve is not enough to accumulate to cause the rubber sleeve to move. When the first section of the teeth is cut, since the structure between the first section and the second section is smooth, during the rotation of the rubber sleeve, the displacement caused by the first part of the teeth will be offset or released due to the meshing rotation of the rubber sleeve and the second part of the teeth, thereby avoiding the difference between the accuracy of the wedge on the rubber sleeve and the accuracy of the teeth 16 on the guide roller 8. When the teeth 16 on the guide roller 8 cooperate with the wedge on the rubber sleeve 5, the guide roller 8 and the rubber sleeve will form a small displacement due to the size difference between the two. Each meshing will bring a small displacement. When there are enough meshing teeth, the accumulated displacement causes the rubber sleeve to move on the guide roller 8 and cause the phenomenon of tooth jumping. The scrapping of the multi-wedge belt 7 caused by the generation of multiple wedges, less wedges or half wedges during the cutting process is reduced.

[0028] Since the other end of the support roller 2 is suspended, the support roller 2 may be slightly tilted due to uneven force during the rotation of the rubber sleeve 1. On the one hand, the fixed end of the support roller is subjected to excessive force, and on the other hand, long-term use may cause the support roller 2 to deform and make it impossible to align the rubber sleeve. Preferably, a support mechanism 10 can be provided at the other end of the support roller 2. The support mechanism 10 can be movably fixed to the fixed bracket 1 and can selectively support the other end of the support roller 2. The support mechanism 10 can adopt a sliding mechanism, such as moving left and right along the fixed bracket 1, or telescopic movement relative to the fixed bracket 1. During the process of placing the rubber sleeve, the support mechanism 10 is driven away from the support roller 2 by the sliding mechanism, and when the cutting operation is in progress, the sliding mechanism slides to the other end that cooperates with the support roller to support the suspended end.

[0029] Optionally, a tension support 14 can also be provided at the other end of the tension roller 6 to selectively support one end of the suspension of the tension roller 6. The movement mode of the tension support can be the same as that of the support mechanism 10 of the support roller, sliding or telescopic. For example, the sliding mode can also be provided on the same sliding mechanism 15 as the support mechanism 10. When the multi-V belt cutting machine is running, the sliding mechanism 15 drives the tension support 14 and the support mechanism 10 to move toward the suspension end of the support roller 2 and the tension roller 6, and the support suspension end can be rotated relative to the support mechanism 10 and the tension support 14. Of course, other replaceable methods can also be used, such as the tension mechanism 14 is a telescopic structure driven by a cylinder, which is used for support when extended and for separation when retracted, and there is no limitation here.

[0030] In order to prevent the support roller 6 from damaging the cutter 3, the outer surface of the support roller 6 is coated with rubber.

[0031] Optionally, the multi-V belt cutting machine also includes a protective device arranged outside the multi-V belt cutting machine, such as a door arranged in the direction of personnel entry. The door is closed during cutting to prevent personnel from entering and causing injuries. The door is opened after the cutting stops to facilitate the removal of the multi-V belt and the installation of a new rubber sleeve.

[0032] Figure 3 The table shows the scrap rate statistics of multi-V belts, where the number of cuts refers to the total number of strips cut in one month, and half wedge refers to the situation where half a wedge appears across the wedge portion during cutting; the horizontal axes 1, 2, 3, 4, and 5 correspond to the data statistics of the traditional cutting machine in the past five months; a, b, c, and d are the data statistics of the nearly four weeks after the cutting machine of the present invention is used, from which it can be seen that the scrap rate of the multi-V belts is reduced from 0.03% or 0.02% to the current 0.01% or 0 after the new cutting machine is used, which greatly reduces the scrap rate of the multi-V belts.

[0033] The expressions left, right, up, down, etc. described in the text are all described in conjunction with the placement of the drawings for ease of understanding and are not limitations of the present invention.

Claims

1. A multi-V belt cutting machine, comprising a fixed support (1), a support roller (2), a guide roller (8), and a cutting blade (3), characterized in that: It also includes a tensioning roller (6), one end of the support roller (2) is mounted on a fixed bracket (1), the guide roller (8), the tensioning roller (6) and the support roller (2) are arranged axially parallel, a driving device (9) and a tensioning device (4) are mounted on the fixed bracket and move relative to the fixed bracket, the driving device (9) is connected to the guide roller (8), drives the guide roller (8) to move in a direction perpendicular to the axis of the support roller (2), the tensioning device (4) is connected to one end of the tensioning roller (6), drives the tensioning roller (6) to move in a direction perpendicular to the axis of the support roller (2), and the tensioning roller (6) can rotate relative to the tensioning device (4), the outer circumferential surface of the guide roller (8) is provided with teeth (16) along the axis of the guide roller, and a smooth surface (17) without teeth, and the smooth surface (17) and the teeth (16) are alternately distributed along the axis of the guide roller (8).

2. The multi-V belt cutting machine according to claim 1, characterized in that: It also comprises a slide rail (11) mounted on a fixed bracket (1) along an axis parallel to the support roller (2) and a knife holder (13) movable along the slide rail (11); the cutter (3) is rotatably fixed on the knife holder (13) and movable in a direction perpendicular to the axis of the support roller (2).

3. The multi-V belt cutting machine according to claim 2, characterized in that: It also includes a screw rod (12) arranged on the fixed bracket (1) and parallel to the slide rail (11) and a sliding block located in the tool holder (13); the screw rod (12) is connected to a motor, and the motor drives the screw rod (12) to rotate, thereby driving the tool holder (13) to move along the slide rail (11).

4. The multi-V belt cutting machine according to claim 3, characterized in that: The cutters (3) are more than one cutters (3) arranged in parallel and distributed at intervals.

5. The multi-V belt cutting machine according to claim 1, characterized in that: It also includes a support mechanism (10), wherein the support mechanism (10) can selectively support the other end of the support roller (2).

6. The multi-V belt cutting machine according to claim 5, characterized in that: The supporting mechanism (10) is a telescopic structure.

7. The multi-V belt cutting machine according to claim 5, characterized in that: The supporting mechanism (10) is a sliding mechanism.

8. The multi-V belt cutting machine according to claim 1, characterized in that: The support roller (2) has a surface covered with rubber.

9. The multi-V belt cutting machine according to claim 1, characterized in that: The tensioning device (4) is a rotating mechanism, which drives the tensioning roller (6) to rotate in a direction perpendicular to the axis of the supporting roller (2).

10. The multi-V belt cutting machine according to claim 1, characterized in that: It also includes a tensioning support (14), which can selectively support the other end of the tensioning roller (6).

11. The multi-V belt cutting machine according to claim 1, characterized in that: The driving device (9) is a telescopic structure.

12. The multi-V belt cutting machine according to claim 1, characterized in that: Also included is a door of the protection device, which is closed during cutting and opened after cutting stops.

Images