Cutter head device with elastic blade positioning function for cutting bed

Abstract

The invention provides a tool bit device with an elastic blade positioning function for a cutting bed. The tool bit device comprises a blade positioning assembly and a knife grinding device which are fixed to the cutting bed, and a cutter is fixed to the blade positioning assembly. By means of the air cylinder type center cylinder design, the whole device can be pushed to move in the vertical direction, ascending and descending positioning of a cutter in the vertical direction is achieved, and the purpose of cutting of the cutter in the vertical direction is achieved; and a deep groove ball bearing used in the chassis fixing block can fix the cutting edge of the cutter, and does not influence the movement of the cutter, so that the cutter can move in the horizontal direction and does not deviate, and the stability of the cutter in the blade positioning assembly is greatly enhanced. And in addition, an elastic rubber ring is designed in the double-wheel counter-rotating flat-pushing type knife grinding device, so that the knife edge of the cut-off knife can move to the position flush with the two grinding wheels, and then the effect of grinding the cut-off knife in the operation gap can be achieved.

Description

Technical Field

[0001] The present invention relates to the fields of automated machinery and automatic textile cutting machines, and more particularly to a cutter head device with elastically positioned blades for cutting machines. Background Art

[0002] Modern large-scale garment production in the leather, paper, clothing, and textile industries utilizes automated cutting machines. These machines, also known as computer numerical control (CNC) cutting machines, are a new type of garment manufacturing machine tool. Currently, in the field of CNC cutting technology, to improve cutting efficiency, multiple layers of fabric are often stacked and laminated. Fabric thicknesses exceed 6 cm, and these stacked layers are very rigid. The CNC blades must operate at high speeds and for extended periods, requiring them to exhibit excellent wear resistance. The stacked fabric thickness on our production lines reaches 10 cm. After repeated use, the blades become very blunt and pick up various oils, stains, and fiber filaments. Therefore, the cutters require stable blade positioning and the ability to be polished and maintained between cuts.

[0003] Prior art uses pneumatic cylinder control for high automation, enabling multiple sharpening of the cutter blade, further reducing cutter costs. Prior art grinding mechanisms typically employ a cylinder-controlled belt-type motor-driven grinding wheel. Belt-type motor-driven grinding wheels have low controllability and cannot be turned on and off instantly. Starting up requires a certain acceleration time before reaching a stable grinding speed, and stopping also requires a certain deceleration time, gradually reducing the grinding speed. This acceleration and deceleration leads to poor grinding stability during cutter sharpening. Furthermore, physical spring structures are used for buffering. For small, delicate parts like cutters, excessively hard contact can easily lead to over-grinding or incomplete grinding, and adjusting the spring to the appropriate elasticity is also challenging. Furthermore, existing cutting machine sharpening devices utilize a grinding wheel with an internal motor to minimize space usage. However, these grinding wheels with internal motors suffer from high manufacturing costs, slow heat dissipation, and high maintenance costs. To address these issues, technicians adopted a cylinder-type dual-grinding wheel design with an external motor. Patent number CN 107350907 A discloses a new knife sharpening device for computerized cutting machines. The device includes dual grinding wheels with parallel axes, a guide shaft, a sharpening spring, and a connecting frame. The sharpening spring is mounted on the outer diameter of the guide shaft, and the two ends of the guide shaft are connected to the connecting frame. An elastic element is used to press the grinding wheels against the sides of the cutting blade, and the high-speed rotating grinding wheels grind the cutting blade. However, this device has a problem. The working principle of the sharpening device is that it uses a cylinder to control the transmission fork, and then the sharpening operation of the dual grinding wheels is controlled by the sharpening rod and elastic element through the guide rail and transmission wheel. This has the problem of a long force range and the forces not acting on the same straight line. This results in a complex structure, low transmission efficiency, and low sharpening efficiency.

[0004] In view of this, we invented a cutter head device with elastic positioning of the blade for cutting machines. The cylinder-type center tube design is used to promote the vertical movement of the cutter positioning device. By adjusting the position of the cutting machine, the blade of the cutter is moved to a position flush with the two grinding wheels, thereby realizing the grinding and maintenance of the cutter during operation. Summary of the Invention

[0005] The purpose of the present invention is to provide a cutter head device with elastic positioning of the blade for a cutting machine, which adopts a cylinder-type center tube design, can push the entire device to move in the vertical direction, and also drive the cutter fixing block on the connecting bracket to move synchronously, thereby achieving the rising and lowering positioning of the cutter in the vertical direction; coupled with the elastic rubber ring design in the double-wheel counter-rotating push-type sharpening device, the cutter blade can be moved to a position flush with the two grinding wheels, thereby realizing the grinding effect of the cutter during the operation gap.

[0006] In order to solve the above-mentioned technical problems, the purpose of the present invention is achieved as follows:

[0007] A cutter head device for elastically positioning a blade for a cutting table includes a blade positioning assembly fixed to the cutting table and a knife sharpening device, wherein a cutting blade is fixed to the blade positioning assembly; the blade positioning assembly includes, from top to bottom, a central tube, a connecting bracket, and a chassis;

[0008] The center tube includes a center tube ring bracket, on which a center tube fixing frame, a first fixed bearing, a center knife tube, a first slider, and a knife handle fixing seat are sequentially sleeved from the edge of the center tube ring bracket to the center; the center tube fixing frame extends toward the vertical fixing direction of the cutter and protrudes from the bottom surface of the center tube ring bracket, and a center tube adjustment plate is provided on the periphery of the center tube fixing frame, and the center tube adjustment plate is also equipped with an outer ring of a center tube fixed bearing; the knife handle fixing seat is detachably connected and fixed to the knife handle of the cutter; a transmission wheel is fixed on the outer ring of the center tube fixed bearing away from the center tube adjustment plate, a belt is provided on the surface of the transmission wheel, and the transmission wheel is connected to a synchronous wheel via the belt; a second fixed bearing is also provided at the lower end of the transmission wheel;

[0009] The connecting bracket includes a C-axis seat and an eight-shaped sleeve fixing bracket fixed to the bottom end of the C-axis seat; the C-axis seat is provided with two through holes, and the through holes and the center of the sleeve of the eight-shaped sleeve fixing bracket are on the same vertical line, and two sliders are sleeved in the eight-shaped sleeve fixing bracket, and the sliders are installed with slide rails, and the bottom ends of the slide rails are connected to the chassis through gaskets;

[0010] The chassis includes a chassis panel that contacts the fabric; a knife fixing device is detachably provided at the center of the chassis panel, the knife fixing device including symmetrically arranged chassis fixing blocks, each having a groove provided thereon, and a deep groove ball bearing provided in the groove for fixing the cutting knife; a chassis cover is also provided on the top surface of the chassis panel;

[0011] The knife sharpening device is a double-wheel counter-rotating flat-push type knife sharpening device.

[0012] Furthermore, a gasket and a bearing support ring are sequentially provided at the lower end of the second fixed bearing to ensure the stability of the bearing.

[0013] Furthermore, a connecting fixing block is fixed to the horizontal shaft seat end of the C-axis seat; a cutter fixing block is also provided on the side of the S-shaped sleeve fixing bracket close to the cutter; and a sensor sensing component is also provided on the second fixed bearing.

[0014] Furthermore, the cutter fixing block includes a fixing block connecting plate and a clamping blade detachably mounted on the fixing block connecting plate.

[0015] Furthermore, the double-wheel counter-rotating flat-push sharpening device includes a sharpening motor, a transmission pulley shaft, and a flat-push track plate; the sharpening motor is fixed to one side of the flat-push track plate through a motor fixing plate, and the flat-push track plate is provided with a double-grinding wheel counter-rotating structure on the side away from the sharpening motor; the transmission pulley shaft protrudes from the motor fixing plate, and two motor pulleys are provided on the protruding part from top to bottom; the double-grinding wheel counter-rotating structure includes an integrally formed connecting plate and two fixing frames, and a grinding wheel is installed on the fixing frame; the fixing frame includes a column and side plates arranged at both ends of the column, and the grinding wheel is installed between the two side plates through a grinding wheel fixing shaft; the grinding wheel includes a main shaft, a belt groove, and a number of grinding rings arranged on the surface of the main shaft; the motor pulley forms a transmission connection with the belt groove on the grinding wheel through a rubber ring.

[0016] Furthermore, a slide rail groove is provided on the side of the push track plate facing away from the sharpening motor; and a rubber ring positioning groove is also provided on the column.

[0017] Furthermore, two rubber rings are provided; the rubber rings include rubber ring A and rubber ring B; the grinding wheel includes grinding wheel A and grinding wheel B; the motor pulley includes motor pulley A and motor pulley B; the motor pulley A is connected to the grinding wheel A through rubber ring A, and the motor pulley B is connected to the grinding wheel B through rubber ring B.

[0018] Furthermore, the grinding wheel A and the grinding wheel B have the same size specifications, and the grinding ring on the grinding wheel A and the grinding ring on the grinding wheel B are arranged at intervals.

[0019] The beneficial effects of the present invention are:

[0020] Compared to the prior art, the present invention's elastically positioned cutter head device for a cutting machine blade utilizes a cylinder-type center tube design, which propels the entire device vertically and simultaneously drives the blade fixing block on the connecting bracket to achieve vertical upward and downward positioning of the cutter, thereby achieving vertical cutting performance. The deep-groove ball bearings used in the chassis fixing block secure the cutter blade without interfering with its movement, allowing the cutter to move horizontally without deflection, significantly enhancing the cutter's stability within the blade positioning assembly. Furthermore, the elastic rubber ring design within the dual-wheel, counter-rotating, push-to-grind sharpening device allows the cutter blade to move flush with the two grinding wheels, enabling sharpening of the cutter during operation. During high-speed dual-grinding wheel operation, the primary consumable material is the rubber ring, resulting in low manufacturing and maintenance costs. The spacing between the grinding rings of the dual grinding wheels not only improves machining quality but also extends the life of the grinding wheels. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a schematic diagram of the assembly structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the central tube structure of the present invention;

[0024] Figure 3 This is a rear view of the center tube of the present invention;

[0025] Figure 4 For the present invention Figure 3 AA section diagram of the center tube;

[0026] Figure 5 This is a schematic diagram of the chassis structure of the present invention;

[0027] Figure 6 This is a front view of the chassis of the present invention;

[0028] Figure 7 For the present invention Figure 6 Chassis BB cross-section diagram;

[0029] Figure 8 It is a structural schematic diagram of the knife sharpening device of the present invention.

[0030] In the figure, 1-blade positioning assembly; 2-sharpening device; 3-cutter; 4-drive wheel; 5-belt; 6-synchronizing wheel; 7-connecting fixed block; 8-cutter fixed block; 9-sensor induction element; 11-center cylinder; 12-connecting bracket; 13-chassis; 111-center cylinder ring bracket; 112-center cylinder fixing bracket; 113-first fixed bearing; 114-center knife cylinder; 115-first slider; 116-knife handle fixing seat; 117-center cylinder adjustment plate; 118-center cylinder fixed bearing outer ring; 119-second fixed bearing; 121-C shaft seat; 1211-through hole; 122-eight-shaped sleeve fixing bracket; 123-slider; 124-slide rail; 125-gasket; 131-chassis panel ;132-chassis fixing block;133-groove;134-deep groove ball bearing;135-chassis cover;81-fixed block connecting plate;82-clamping blade;201-sharpening motor;202-drive pulley shaft;2021-motor pulley;2101-motor pulley A;2102-motor pulley B;203-push track plate;204-motor fixing plate;205-connecting plate;206-fixing frame;2061-column;2062-side plate;207-grinding wheel;701-grinding wheel A;702-grinding wheel B;2071-spindle;2072-groove;2073-grinding ring;208-grinding wheel fixing shaft;209-rubber ring;2091-rubber ring A;2092-rubber ring B. DETAILED DESCRIPTION

[0031] The present invention is further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only and are schematic, not actual, representations. They should not be construed as limiting this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted from the drawings.

[0032] Example 1

[0033] like Figure 1-8As shown, a cutter head device for elastically positioning a blade for a cutting machine includes a blade positioning assembly 1 fixed to the cutting machine and a sharpening device 2, wherein a cutting knife 3 is fixed to the blade positioning assembly 1; the blade positioning assembly 1 includes, from top to bottom, a center cylinder 11, a connecting bracket 12, and a chassis 13; the center cylinder 11 includes a center cylinder ring bracket 111, and a center cylinder fixing frame 112, a first fixed bearing 113, a center knife cylinder 114, a first slider 115, and a knife handle fixing seat are sequentially sleeved from the edge of the center cylinder ring bracket 111 to the center. 116; the center tube fixing frame 112 extends in the vertical fixing direction of the cutter 3 and protrudes from the bottom surface of the center tube ring bracket 111, and the center tube fixing frame 112 is provided with a center tube adjustment plate 117 on the periphery thereof, and the center tube adjustment plate 117 is also provided with a center tube fixed bearing outer ring 118; the knife handle fixing seat 116 is detachably connected and fixed to the knife handle of the cutter 3; the center tube fixed bearing outer ring 118 is fixed with a transmission wheel 4 on the side away from the center tube adjustment plate 117, and the surface of the transmission wheel 4 is provided with a belt 5 The transmission wheel 4 is connected to the synchronous wheel 6 through the belt 5; the lower end of the transmission wheel 4 is also provided with a second fixed bearing 119; the connecting bracket 12 includes a C-axis seat 121, and an eight-shaped sleeve fixing bracket 122 fixed to the bottom end of the C-axis seat 121; the C-axis seat 121 is provided with two through holes 1211, and the through holes 1211 and the sleeve center of the eight-shaped sleeve fixing bracket 122 are on the same vertical line, and two sliders 123 are sleeved in the eight-shaped sleeve fixing bracket 122, and the slider 123 is installed with a slide rail 1 24. The bottom end of the slide rail 124 is connected to the chassis 13 through a gasket 125; the chassis 13 includes a chassis panel 131 in contact with the fabric; the center of the chassis panel 131 is detachably provided with a knife fixing device, the knife fixing device includes a symmetrically arranged chassis fixing block 132, the chassis fixing block 132 is provided with a groove 133, and the groove 133 is provided with a deep groove ball bearing 134 for fixing the cutting knife 3; the top surface of the chassis panel 131 is also provided with a chassis cover 135; the knife sharpening device 2 is a double-wheel counter-rotating push-type knife sharpening device.

[0034] Specifically, the transmission wheel 4 and the synchronous wheel 6 are connected to each other via a belt 5, and the synchronous wheel 6 is connected to a motor (not shown in the present invention). Furthermore, a gasket and a bearing support ring are sequentially provided at the lower end of the second fixed bearing 119 to ensure bearing stability. Furthermore, in the connecting bracket 12, two through-holes 1211 are defined in the C-axis seat 121, and these through-holes 1211 are aligned with the center of the sleeve of the splayed sleeve fixing bracket 122. This allows the slide rail 124 to move vertically using the design of the slider 123. The bottom end of the slide rail 124 is connected to the chassis 13 via a gasket 125. Due to the design of the slider 123 and the slide rail 124, the connecting bracket 12 can move with the movement of the slide rail 124, thereby causing the cutter fixing block 8 fixed on the connecting bracket 12 to move accordingly, and the cutter 3 also moves accordingly, thereby achieving the purpose of cutting with the cutter 3 in the vertical direction; and through the design of the deep groove ball bearing 134 in the chassis 13, the deep groove ball bearing 134 can fix the blade of the cutter 3 without affecting the movement of the cutter 3, so that the cutter 3 can move in the horizontal direction without causing deviation, thereby greatly enhancing the stability of the cutter in the blade positioning assembly 1.

[0035] Furthermore, a connecting block 7 is fixed to the horizontal axis end of the C-axis seat 121; a cutter fixing block 8 is also provided on the side of the splayed sleeve fixing bracket 122 near the cutter; and a sensor 9 is provided on the second fixed bearing 119. The sensor 9 is specifically a small square metal sensor that facilitates the movement of the cutter head assembly on the cutting table and prevents collisions. Furthermore, the cutter fixing block 8 includes a fixing block connecting plate 81 and a clamping blade 82 that is removably mounted on the fixing block connecting plate 81. The fixing block connecting plate 81 has a groove that matches the back of the cutter blade to secure the cutter. The two sides of the groove in the fixing block connecting plate 81 form an angle with the connecting plane of the splayed sleeve fixing bracket 122, with the angle ranging from 65° to 85°. This allows the clamping blade 82, which is fixed to the side of the fixing block connecting plate 81, to form a certain angle with the cutter 3, creating a gripper-like grip, thereby enhancing the clamping and stabilizing effect of the cutter fixing block 8 on the cutter 3.

[0036] Furthermore, the double-wheel counter-rotating flat-push sharpening device includes a sharpening motor 201, a transmission pulley shaft 202, and a flat-push track plate 203; the sharpening motor 201 is fixed to one side of the flat-push track plate 203 through a motor fixing plate 204, and the flat-push track plate 203 is provided with a double-grinding wheel counter-rotating structure on the side away from the sharpening motor 201; the transmission pulley shaft 202 protrudes from the motor fixing plate 204, and two motor pulleys 21 are provided on the protruding part from top to bottom; the double-grinding wheel counter-rotating structure includes an integrally formed connecting plate 205 The machine comprises two fixed frames 206, each of which is equipped with a grinding wheel 207. The fixed frames 206 include a column 2061 and side panels 2062 disposed at either end of the column. The grinding wheel 207 is mounted between the side panels 2062 via a grinding wheel fixing shaft 208. The grinding wheel 207 includes a main shaft 2071, a belt groove 2072, and a number of grinding rings 2073 disposed on the surface of the main shaft 2071. The motor pulley 21 is in transmission connection with the belt groove 2072 on the grinding wheel 207 via a rubber ring 209. Furthermore, a slide rail groove is provided on the side of the horizontal push track plate 203 facing away from the sharpening motor 201. The column 2061 is also provided with a rubber ring positioning groove. The rubber ring 209 connects the motor pulley 21 and the grinding wheel 207. Due to the design of the double grinding wheels, if the rubber ring 209 is designed on the same plane, there will be problems of rubber ring friction and transmission failure. Therefore, the motor pulley 21 is designed to be two in the vertical direction, namely motor pulley A and motor pulley B, which can reduce the friction between the rubber rings 209, reduce losses and costs, and the rubber ring also has the function of elastic positioning. The two grinding wheels are then fixed by two rubber rings, which can achieve the purpose of synchronous operation of the two wheels.

[0037] Furthermore, two rubber rings 209 are provided; the rubber rings 209 include rubber ring A and rubber ring B; the grinding wheel 207 includes grinding wheel A 701 and grinding wheel B 702; the motor pulley 21 includes motor pulley A and motor pulley B; the motor pulley A is connected to the grinding wheel A through rubber ring A, and the motor pulley B is connected to the grinding wheel B through rubber ring B. Preferably, the grinding wheels A and B have the same size and specifications, and the grinding ring 2073 on the grinding wheel A is spaced apart from the grinding ring 2073 of the grinding wheel B. To achieve this purpose, the grinding wheel A and the grinding wheel B are designed to be inverted head to tail, so that the grinding ring of the grinding wheel A is between the grinding rings of the grinding wheel B. For the sake of distinction, the part where the grinding wheel spindle is retained is called the head end, and the other end is called the tail end. Grinding wheels A and B are designed with their ends reversed. That is, grinding wheel A is mounted on a fixed frame in the usual manner, with the spindle head end, a number of grinding rings, and the spindle tail end arranged in the order from top to bottom. Grinding wheel B is mounted on a fixed frame, with the spindle tail end, a number of grinding rings, and the spindle head end arranged in the order from top to bottom. This creates an interval between the grinding rings on grinding wheel A and those on grinding wheel B. This design significantly improves sharpening efficiency, shortens machining cycles, and helps achieve a uniform grinding texture and high-quality machined surface, minimizing defects such as scratches. Furthermore, the staggered design reduces abnormal wear on the grinding wheels, extending their service life and reducing production costs.

[0038] Unless otherwise specified, in the present invention, if there are terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicating orientation or positional relationships, they are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or positional relationships in the present invention are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, they can understand the specific meanings of the above terms in conjunction with the drawings and according to specific circumstances.

[0039] Unless otherwise specified or limited, the terms "disposed," "connected," and "connected" in this disclosure should be interpreted broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediary, or internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on the specific circumstances.

[0040] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A cutter head device for elastically positioning a blade for a cutting machine, comprising a blade positioning assembly (1) fixed on the cutting machine and a knife sharpening device (2), wherein a cutting knife (3) is fixed on the blade positioning assembly (1), and characterized in that: The blade positioning assembly (1) comprises, from top to bottom, a central tube (11), a connecting bracket (12) and a chassis (13); The central tube (11) includes a central tube ring bracket (111), and a central tube fixing frame (112), a first fixed bearing (113), a central knife tube (114), a first slide block (115), and a knife handle fixing seat (116) are sequentially sleeved from the edge of the central tube ring bracket (111) to the center; the central tube fixing frame (112) extends in the vertical fixing direction of the cutting knife (3) and protrudes from the bottom surface of the central tube ring bracket (111), and the outer periphery of the central tube fixing frame (112) is provided with a central tube adjustment plate (117). ), the center tube adjustment plate (117) is also equipped with a center tube fixed bearing outer ring (118); the knife handle fixing seat (116) is detachably connected and fixed to the knife handle of the cutting knife (3); the center tube fixed bearing outer ring (118) is fixed with a transmission wheel (4) on a side away from the center tube adjustment plate (117), and a belt (5) is provided on the surface of the transmission wheel (4), and the transmission wheel (4) is connected to a synchronous wheel (6) through the belt (5); the lower end of the transmission wheel (4) is also provided with a second fixed bearing (119); The connecting bracket (12) includes a C-axis seat (121) and an eight-shaped sleeve fixing bracket (122) fixed to the bottom end of the C-axis seat (121); two through holes (1211) are provided on the C-axis seat (121), and the through holes (1211) and the center of the sleeve of the eight-shaped sleeve fixing bracket (122) are on the same vertical line; two sliders (123) are provided inside the eight-shaped sleeve fixing bracket (122), and a slide rail (124) is installed on the slider (123); the bottom end of the slide rail (124) is connected to the chassis (13) through a gasket (125); The chassis (13) includes a chassis panel (131) in contact with the cloth; a knife fixing device is detachably provided at the center of the chassis panel (131), the knife fixing device including symmetrically arranged chassis fixing blocks (132), a groove (133) provided on the chassis fixing blocks (132), and a deep groove ball bearing (134) for fixing the cutting knife (3) provided in the groove (133); a chassis cover (135) is also provided on the top surface of the chassis panel (131); The knife sharpening device (2) is a double-wheel counter-rotating flat-push type knife sharpening device.

2. A cutter head device for elastically positioning a blade for a cutting machine according to claim 1, characterized in that: A gasket and a bearing support ring are also provided in sequence at the lower end of the second fixed bearing (119) to ensure the stability of the bearing.

3. The cutter head device with elastic positioning of a cutting blade for a cutting machine according to claim 1, characterized in that: A connecting fixing block (7) is fixed to the horizontal shaft seat end of the C-axis seat (121); a cutter fixing block (8) is also provided on the side of the eight-shaped sleeve fixing bracket (122) close to the cutter; and a sensor sensing element (9) is also provided on the second fixed bearing (119).

4. The cutter head device with elastic positioning of a cutting blade for a cutting machine according to claim 3, characterized in that: The cutter fixing block (8) comprises a fixing block connecting plate (81) and a clamping blade (82) detachably mounted on the fixing block connecting plate (81).

5. The cutter head device with elastic positioning of a cutting blade for a cutting machine according to claim 1, characterized in that: The double-wheel counter-rotating flat-push type knife sharpening device comprises a knife sharpening motor (201), a transmission pulley shaft (202), and a flat-push track plate (203); the knife sharpening motor (201) is fixed to one side of the flat-push track plate (203) via a motor fixing plate (204); a double-grinding wheel counter-rotating structure is provided on the side of the flat-push track plate (203) away from the knife sharpening motor (201); the transmission pulley shaft (202) protrudes from the motor fixing plate (204), and two motor pulleys (21) are provided on the protruding portion from top to bottom; the double-grinding wheel counter-rotating structure comprises an integrally formed connecting plate (205) and two fixing frames (20 6), a grinding wheel (207) is mounted on the fixing frame (206); the fixing frame (206) includes a column (2061) and side plates (2062) arranged at both ends of the column, and the grinding wheel (207) is mounted between the two side plates (2062) via a grinding wheel fixing shaft (208); the grinding wheel (207) includes a main shaft (2071), a belt groove (2072), and a number of grinding rings (2073) arranged on the surface of the main shaft (2071); the motor pulley (21) is connected to the belt groove (2072) on the grinding wheel (207) through a rubber ring (209) to form a transmission connection.

6. The cutter head device with elastic positioning of a cutting blade for a cutting machine according to claim 5, characterized in that: A slide rail groove is provided on the side of the horizontal push track plate (203) facing away from the knife sharpening motor (201); and a rubber ring positioning groove is also provided on the upright column (2061).

7. The cutter head device for elastically positioning a cutting blade for a cutting machine according to claim 5, characterized in that: Two rubber rings (209) are provided; the rubber rings (209) include rubber ring A (2091) and rubber ring B (2092); the grinding wheel (207) includes grinding wheel A (701) and grinding wheel B (702); the motor pulley (21) includes motor pulley A (2101) and motor pulley B (2102); the motor pulley A (2101) is connected to the grinding wheel A (701) through the rubber ring A (2091), and the motor pulley B (2102) is connected to the grinding wheel B (702) through the rubber ring B (2092).

8. The cutter head device for elastically positioning a cutting blade for a cutting machine according to claim 7, characterized in that: The grinding wheel A (701) and the grinding wheel B (702) have the same size specifications, and the grinding ring (2073) on the grinding wheel A (701) and the grinding ring (2073) on the grinding wheel B (702) are arranged at intervals.

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