Online band knife sharpening device capable of automatically adjusting abrasive disc

Abstract

The invention belongs to the technical field of textile machinery, and particularly relates to a band knife online knife sharpening device capable of automatically adjusting a sand disc, which comprises a base, a knife sharpening mechanism and an adjusting mechanism, and the knife sharpening mechanism automatically adjusts the deflection angle and the movement amount of the sand disc through the adjusting mechanism, so that the sand disc and a band knife keep a stable contact effect. The knife sharpening mechanism comprises a sand disc, a knife sharpening motor, a motor base, a pressing block and a feeding adjusting assembly, and the feeding adjusting assembly keeps and adjusts the relative positions of the sliding base and the sliding column. Each adjusting mechanism comprises an air cylinder, a rotating shaft, a mandrel, a supporting seat, two adjusting connecting rods, a push block and a swing plate, the rotating shafts drive the push blocks to stir the adjusting connecting rods of the two adjusting mechanisms when rotating, the bottom ends of the adjusting connecting rods of the two adjusting mechanisms are connected through springs, the top ends of the adjusting connecting rods are fixedly connected with the swing plates, and the swing plates are connected with the sliding seats of the knife sharpening mechanism. According to the invention, the belt knife which is not sharp after being abraded is subjected to online grinding, so that the belt knife can be kept sharp, and the quality of a sectioned suede is kept.

Description

Technical Field

[0001] The invention belongs to the technical field of textile machinery, and in particular relates to an online knife sharpening device with a knife capable of automatically adjusting an abrasive disc. Background Art

[0002] The cloth slitting machine, also known as the slitting machine, is suitable for slitting double-layer velvet fabrics made of natural fibers such as wool, silk, acrylic, polyester and artificial fibers. Through the feeding system of the cloth slitting machine, the roll fabric is unfolded and flattened. After the fabric is unfolded, the drive motor drives the fabric to enter the centering device with a knife vertically and smoothly. The position of the fabric is detected by a photoelectric or mechanical sensor to ensure that the center line of the fabric is in the correct position. Then the cloth is slit by the knife to form two single-sided velvet fabrics. The knife is an annular knife belt that rotates at high speed through a pulley. When the fabric passes through the knife, the annular knife belt reciprocates and applies force to the fabric to split it. Due to frequent reciprocating use, the knife is easy to wear, which will reduce the uniformity of the fabric surface after slitting, and it is easy to stick to hair, affecting the quality of the slitting. Therefore, the knife needs to be sharpened to ensure the stability and quality of the slitting. The traditional sharpening process requires the cloth slitting machine to be shut down and the knife to be disassembled for sharpening, which reduces work efficiency. Therefore, the industry has gradually developed online knife sharpening equipment for the knife.

[0003] The Chinese utility model patent with publication number CN221136104U discloses an online knife sharpening device for a cloth cutting machine. The active online knife sharpening is adopted. The grinding disc rotates and is driven by a brushless motor so that the two grinding discs always move in opposite directions on both sides of the belt knife, ensuring the verticality of the belt knife and the uniformity of the knife sharpening. The blade of the belt knife is relatively sharp and the cut cloth surface is glossy and does not stick to hair.

[0004] However, during the grinding process of the band knife, the sanding disc will also wear out, and the wear of the sanding disc will affect the quality of the grinding. It is necessary to adjust the position of the sanding disc in a timely and rapid manner. The existing online grinding device cannot monitor and adjust the wear of the sanding disc in real time, which affects the grinding effect. At the same time, since the cloth cutting machine is relatively precise, the online grinding device will generate debris and dust dropped by the sanding machine. If not handled, it will damage the cloth cutting machine and affect the quality of the cloth cutting. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the problem to be solved by the present invention is that when the belt knife of the existing cloth cutting machine is sharpened online, the sanding disc will wear out, which reduces the grinding effect of the belt knife and the cloth cutting efficiency. At the same time, the dust generated by grinding is easy to pollute the cloth cutting machine and the cloth. The present invention provides an online belt knife sharpening device with an automatic sanding disc adjustment. By maintaining a constant pressure cylinder and cooperating with a rotating rod adjustment mechanism, the grinding wheels on both sides of the belt knife maintain a stable contact effect with the belt knife, and the deflection angle of the sanding disc is automatically adjusted according to the wear amount of the sanding disc, so as to ensure the sharpness of the belt knife and maintain a high quality of the cut cloth surface.

[0006] In order to achieve the above-mentioned purpose, the present invention provides an online knife sharpening device for a belt knife with an automatic adjustment sand disc, comprising: a base, a knife sharpening mechanism, and an adjustment mechanism. The knife sharpening mechanism has two groups, which are arranged on both sides of the belt knife, and the knife sharpening mechanism performs online knife sharpening on the belt knife; the knife sharpening mechanism automatically adjusts the deflection angle and movement amount of the sand disc through the adjustment mechanism, so that the sand disc and the belt knife maintain a stable contact effect, and the base is fixed on a cloth cutting machine or other equipment provided with a belt knife.

[0007] The knife sharpening mechanism includes a sanding disc, a knife sharpening motor, a motor seat, a pressure block, and a feed adjustment assembly. The sanding disc is mounted on the output shaft of the knife sharpening motor, and the pressure block is mounted on the other side of the belt knife. The pressure block cooperates with the sanding disc to prevent the belt knife from deforming during grinding. The knife sharpening motor is mounted on the motor seat. The feed adjustment assembly maintains and adjusts the relative position of the slide seat and the slide column.

[0008] The adjusting mechanism comprises a cylinder, a rotating shaft, a core shaft, a supporting seat, and two sets of adjusting connecting rods, a push block, and a swing plate. The adjusting mechanism is installed on the base, and the supporting seat is movably connected with a freely rotatable rotating shaft and a fixed core shaft. The rotating shaft is connected to the piston rod of the cylinder through a rocker, and a push block is arranged on the rotating shaft. The push block is in the shape of an elongated strip, and when the rotating shaft rotates, the push block drives the push block to respectively move the adjusting connecting rods of the two sets of adjusting mechanisms. The bottom ends of the adjusting connecting rods of the two sets of adjusting mechanisms are connected by springs, and the top ends of the adjusting connecting rods are fixedly connected with a swing plate, which is sleeved on the core shaft and can rotate relative to the core shaft, and the swing plate is connected to the sliding seat of the sharpening mechanism.

[0009] According to another embodiment of the present invention or any of the aforementioned embodiments, the knife sharpening device further includes a guide mechanism, wherein there are two guide mechanisms, which are symmetrically installed on both sides of the knife sharpening mechanism and the adjustment mechanism, each guide mechanism includes two guide plates symmetrical to the knife, the guide plates are installed on the guide bracket, one of the guide plates is fixed, and the other guide plate is sleeved on the connecting rod and is movable, and the distance between the two guide plates can be adjusted by a plum blossom knob.

[0010] According to another embodiment of the present invention or any of the aforementioned embodiments, a knife sharpening device is provided with a sponge installed on the guide plate of the guide mechanism. The sponge is block-shaped and fits the band knife. The sponge cleans dust attached to the band knife after grinding.

[0011] According to another embodiment of the present invention or any of the above embodiments, the knife sharpening device further comprises a cover shell, which covers the knife sharpening mechanism and the adjustment mechanism, and is mounted on the base, and slots for the knife to enter and exit are arranged on both sides of the cover shell. The cover shell prevents the operator or other mechanisms such as the cloth cutting machine from being safely protected when the sanding disc is working, and prevents dust, smoke and particles generated by grinding from entering the cloth cutting machine and affecting the cloth cutting quality.

[0012] According to another embodiment of the present invention or any of the aforementioned embodiments, the knife sharpening device further includes an exhaust duct, which is installed on the cover shell. The exhaust duct is provided with two branch pipes to cooperate with two sand discs. The exhaust duct uses a fan to suck and discharge dust, smoke and particulate matter generated when the sand discs are ground.

[0013] According to another embodiment of the present invention or a knife sharpening device of any of the aforementioned embodiments, the pressure block is installed on a bracket fixed on a support seat by bolts and nuts, and the horizontal position of the pressure block can be adjusted by adjusting the position of the nut on the bolt, thereby adjusting the tightness of the contact with the belt knife.

[0014] According to another embodiment of the present invention or any of the aforementioned embodiments of the knife sharpening device, a detachable thickening plate is installed on the inner side of the adjusting connecting rod, and the thickening plate thickens the matching part between the adjusting connecting rod and the push block according to the cylinder pressure, the elastic force of the spring, and the grinding contact force to match the deflection adjustment range.

[0015] According to a knife sharpening device according to yet another embodiment of the present invention or any of the aforementioned embodiments, the cross section of the contact portion between the push block and the adjusting connecting rod is arc-shaped.

[0016] According to another embodiment of the present invention or any of the aforementioned embodiments of the knife sharpening device, the feed adjustment assembly includes a disc spring, a screw, a turning hand wheel, a slide column, and a slide seat, a slide seat is fixedly connected to the bottom of the motor seat, a slide column is installed at the center of the slide seat and the slide seat can move relative to the slide column, the screw rod and the slide column are fixedly connected to the swing plate of the adjustment mechanism, a limit plate is provided on the screw rod, a plurality of disc springs are sleeved on the screw rod and contact the limit plate, a turning hand wheel is installed on the screw rod, and turning the hand wheel locks the connecting block of the slide seat on the disc spring.

[0017] According to a knife sharpening device in yet another embodiment of the present invention or any of the aforementioned embodiments, at least two limit blocks are installed on the rotating shaft, the limit blocks are detachable, and the limit blocks limit the axial position of the rotating shaft.

[0018] According to another embodiment of the present invention or a knife sharpening device of any of the aforementioned embodiments, the support seat is in the shape of a plate and is vertically installed on the base. Two through slots are provided in the support seat, a push block is provided in one of the through slots, and a limit block is installed in the other through slot. A through hole is provided on the top of the support seat, and the rotating shaft is installed in the through hole.

[0019] According to another embodiment of the present invention or a knife sharpening device of any of the aforementioned embodiments, a handle is installed on the rotating shaft of the adjustment mechanism, and the sand disc can be retracted by rotating the handle in the opposite direction to adjust the feed adjustment component or perform maintenance or replace the sand disc online.

[0020] Beneficial effects of the present invention:

[0021] 1. The belt knife online sharpening device with automatic adjustment sand disc of the present invention can be installed on a cloth cutting machine to grind the belt knife that is no longer sharp after being worn online, so that the belt knife can remain sharp and maintain the quality of the cut suede surface;

[0022] 2. The present invention controls the contact force between the sand disc and the band knife through the cylinder, spring, adjusting connecting rod and push block, so that the sand disc can deflect according to the set contact force after being worn, thereby automatically feeding the sand disc and realizing a real-time, manual-free adjustment effect;

[0023] 3. When the sand disc is worn out and reaches the limit of the adjustment mechanism, the sand disc can be moved backward out of contact with the belt knife through the handle. At this time, the sand disc can be pushed forward by turning the hand wheel. Release the handle and the sand disc will continue to grind the belt knife, entering a new round of deflection adjustment cycle. There is no need to stop the machine, and the adjustment is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional schematic diagram of the belt knife online sharpening device of the automatic adjustment sand disc and the belt knife of the present invention;

[0025] Figure 2 It is a three-dimensional schematic diagram of the belt knife online sharpening device for removing the cover shell of the automatic adjustment sand disc and the belt knife;

[0026] Figure 3 It is a schematic top view of the belt knife of the present invention, the belt knife online sharpening device with automatic adjustment sand disc for removing the cover;

[0027] Figure 4 It is a schematic side view of the belt knife online sharpening device for removing the cover shell of the automatic adjustment sand disc and the belt knife;

[0028] Figure 5 It is a three-dimensional schematic diagram of the belt knife online sharpening device for removing the cover shell of the automatic adjustment sand disc and the belt knife;

[0029] Figure 6 It is a three-dimensional schematic diagram of the adjustment mechanism and part of the knife sharpening mechanism of the present invention;

[0030] Figure 7 It is a three-dimensional schematic diagram of the rotating shaft, the push block and the adjusting connecting rod of the present invention;

[0031] Figure 8 It is a schematic diagram of the principle that the rotating shaft according to the present invention rotates to push the adjusting connecting rod to drive the grinding wheel to deflect;

[0032] Fig. 9 It is a three-dimensional schematic diagram of the support base of the present invention;

[0033] Fig.10is a three-dimensional schematic diagram of the knife sharpening mechanism of the present invention;

[0034] In the figure:

[0035] 100, base;

[0036] 200, cover;

[0037] 300, with a knife;

[0038] 400, exhaust duct;

[0039] 500, sharpening mechanism; 501, sanding disc; 502, sharpening motor; 503, disc spring; 504, screw; 505, screw hand wheel; 506, slide column; 507, slide seat; 508, motor seat; 509, pressure block;

[0040] 600, adjusting mechanism; 601, cylinder; 602, handle; 603, rocker; 604, rotating shaft; 605, adjusting connecting rod; 606, push block; 607, swing plate; 608, supporting seat; 609, core shaft; 610, spring;

[0041] 700, guide mechanism; 701, guide plate; 702, plum blossom knob; 703, guide bracket; 704, sponge. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] like Figure 2 , 3As shown, an online sharpening device for a band knife 300 with an automatically adjustable sand disc 501 comprises: a base 100, a sharpening mechanism 500, and an adjusting mechanism 600. The sharpening mechanism 500 has two groups, which are arranged on both sides of the band knife 300. The sharpening mechanism 500 performs online sharpening on the band knife 300. The sharpening mechanism 500 automatically adjusts the deflection angle and movement amount of the sand disc 501 through the adjusting mechanism 600, so that the sand disc 501 and the band knife 300 maintain a stable contact effect. The base 100 is fixed on a fabric cutting machine or other equipment provided with a band knife 300. It also includes a guide mechanism 700, which has two guide mechanisms 700, which are symmetrically installed on both sides of the sharpening mechanism 500 and the adjustment mechanism 600. Each guide mechanism 700 includes two guide plates 701 symmetrical to the band knife 300. The guide plates 701 are installed on a guide bracket 703. One guide plate 701 is fixed, and the other guide plate 701 is sleeved on a connecting rod and is movable. The distance between the two guide plates 701 can be adjusted by a plum blossom knob 702. A sponge 704 is installed on the guide plate 701 of the guide mechanism 700. The sponge 704 is block-shaped and fits the band knife 300. The sponge 704 cleans the dust attached to the band knife 300 after sharpening.

[0044] like Figure 1 As shown, it also includes a cover 200 and an exhaust duct 400. The cover 200 covers the sharpening mechanism 500 and the adjustment mechanism 600. The cover 200 is installed on the base 100. Slots for the belt knife 300 to enter and exit are provided on both sides of the cover 200. The cover 200 prevents the operator or other mechanisms such as the cloth cutting machine from working while the sanding disc 501 is working, and at the same time prevents the dust, smoke, and particles generated by the sharpening from entering the cloth cutting machine and affecting the cloth cutting quality. The exhaust duct 400 is installed on the cover 200. The exhaust duct 400 is provided with two branch pipes to cooperate with the two sanding discs 501. The exhaust duct 400 uses a fan to suck and discharge the dust, smoke and particles generated when the sanding disc 501 is sharpened.

[0045] like Figure 4 , 5As shown in 10, the knife sharpening mechanism 500 includes a sanding disc 501, a knife sharpening motor 502, a motor seat 508, a pressure block 509, and a feed adjustment assembly. The sanding disc 501 is mounted on the output shaft of the knife sharpening motor 502, and the pressure block 509 is mounted on the other side of the band knife 300. The pressure block 509 cooperates with the sanding disc 501 to prevent the band knife 300 from deforming during sharpening. The pressure block 509 is mounted on a bracket fixed on the support seat 608 by bolts and nuts. By adjusting the position of the nut on the bolt, the horizontal position of the pressure block 509 can be adjusted to adjust the tightness of contact with the band knife 300. The knife sharpening motor 502 is mounted on the motor seat 508. The feed adjustment assembly maintains and adjusts the relative position of the slide 507 and the slide column 506. The feed adjustment assembly includes a disc spring 503, a screw 504, a screw hand wheel 505, a slide column 506, and a slide 507. The slide 507 is fixedly connected to the bottom of the motor base 508. The slide column 506 is installed at the center of the slide 507 and the slide 507 can move relative to the slide column 506. The screw 504 and the slide column 506 are fixedly connected to the swing plate 607 of the adjustment mechanism 600. A limit plate is provided on the screw 504. A plurality of disc springs 610 are sleeved on the screw 504 and contact the limit plate. The screw hand wheel 505 is installed on the screw 504. The screw hand wheel 505 locks the connecting block of the slide 507 on the disc spring 610.

[0046] like Figure 6 , 7 As shown in FIGS. 8 and 9, the adjustment mechanism 600 includes a cylinder 601, a rotating shaft 604, a core shaft 609, a support seat 608, and two sets of adjustment connecting rods 605, a push block 606, and a swing plate 607. The adjustment mechanism 600 is installed on the base 100. The support seat 608 is movably connected with a freely rotatable rotating shaft 604 and a fixed core shaft 609. The rotating shaft 604 is connected to the piston rod of the cylinder 601 through a rocker 603, and a push block 606 is arranged on the rotating shaft 604. There are no less than two limit blocks installed on the rotating shaft 604, and the limit blocks are detachable. The limit blocks limit the axial position of the rotating shaft 604. The support seat 608 is plate-shaped and vertically installed on the base 100. Two through slots are arranged in the support seat 608, and a push block 606 is arranged in one of the through slots, and a limit block is arranged in the other through slot. A through hole is arranged on the top of the support seat 608, and the rotating shaft 604 is installed in the through hole. A handle 602 is installed on the rotating shaft 604 of the adjustment mechanism 600. By rotating the handle 602 in the opposite direction, the sand disc 501 can be retracted to adjust the feed adjustment component or perform maintenance or replace the sand disc 501 online.

[0047] like Figure 6 , 7As shown in Figures 8 and 9, the cross section of the contact between the push block 606 and the adjustment link 605 is arc-shaped. The push block 606 is in the shape of a long strip. When the rotating shaft 604 rotates, it drives the push block 606 to respectively move the adjustment links 605 of the two adjustment mechanisms 600. The bottom ends of the adjustment links 605 of the two adjustment mechanisms 600 are connected by springs 610. The top ends of the adjustment links 605 are fixedly connected with a swing plate 607. The swing plate 607 is sleeved on the mandrel 609 and can rotate relative to the mandrel 609. The swing plate 607 is connected to the slide seat 507 of the sharpening mechanism 500. A detachable thickening sheet is installed on the inner side of the adjustment link 605. The thickening sheet thickens the matching part of the adjustment link 605 and the push block 606 according to the pressure of the cylinder 601, the elastic force of the spring 610, and the sharpening contact force to match the deflection adjustment range.

[0048] Working principle of the present invention:

[0049] The adjustment mechanism 600 of the present invention adopts a synchronous and reverse adjustment method for the two sets of sharpening mechanisms 500, and can simultaneously adjust the sanding discs 501 on the left and right sides to maintain the same sharpening contact force, so that the sharpening amount of the cutting edges on both sides of the band knife 300 is the same.

[0050] The present invention has two adjustment processes after the sand disc 501 is worn, including deflection adjustment and feed adjustment, and the two adjustment processes are set as one adjustment cycle. Assuming that the wear amount of the sand disc 501 in one adjustment cycle is A, when the push block 606 of the adjustment mechanism 600 is close to horizontal, the adjustment of the push block 606 driven by the cylinder 601 to the motor seat 508 and the sand disc 501 is close to the limit, that is, the maximum adjustable deflection angle is reached, and the wear amount of the sand disc 501 corresponding to the maximum adjustable deflection angle of the adjustment mechanism 600 is set to Q,

[0051] When A<Q, it is in deflection adjustment, and its working process is as follows Figure 8 As shown, the deflection of the adjusting link 605 is mainly affected by three forces: the pulling force F1 of the spring 610, the contact force F2 fed back to the adjusting link 605 by the band knife 300 and the pressure block 509 when the sand disc 501 is sharpening, and the driving force F3 of the push block 606, wherein the action of F3 causes the sand disc 501 to deflect toward the band knife 300, and the actions of F1 and F2 cause the sand disc 501 to move away from the band knife 300, F1+F2=F3, that is, the sand disc 501 maintains a stable equilibrium state during sharpening, and the sand disc 501 and the band knife 300 maintain the set contact force. The driving force F3 of the push block 606 comes from the cylinder 601, which is a constant pressure cylinder 601. The cylinder 601 transmits the force to the sand disc 501 through the rocker 603, the rotating shaft 604, the pressure block 509, the adjusting link 605, the motor seat 508, and the sharpening motor 502. This stage lasts about three days.

[0052] When A=Q, the deflection adjustment reaches the limit and the feed adjustment needs to be started. The handle 602 is used to rotate the shaft 604 in the opposite direction, and the push block 606 rotates. Under the action of the spring 610, the sand disc 501 moves away from the band knife 300. At this time, the screwing hand wheel 505 of the sharpening mechanism 500 is turned. The screwing hand wheel 505 pushes the slide 507 to overcome the elastic force of the disc spring 503 and move toward the direction close to the band knife 300. That is, the slide 507 drives the sharpening motor 502 and the sand disc 501 to move toward the swing plate 607 relative to the slide column 506. This process adjusts the feed amount of the sand disc 501. When the sand disc 501 is close to the band knife 300, release the handle 602 to enter the next adjustment cycle. This stage can be operated by one person and the adjustment can be completed in one minute.

[0053] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the above implementation is only to illustrate the technical concept and features of the present invention, and its purpose is to enable people familiar with this technology to understand the content of the present invention and implement it, and it cannot be used to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An online knife sharpening device with an automatically adjustable sand disc, characterized in that: The invention comprises a base (100), a knife sharpening mechanism (500), and an adjusting mechanism (600). The knife sharpening mechanism (500) has two groups and is arranged on both sides of the belt knife (300). The knife sharpening mechanism (500) performs online sharpening on the belt knife (300). The knife sharpening mechanism (500) automatically adjusts the deflection angle and movement amount of the sand disk (501) through the adjusting mechanism (600), so that the sand disk (501) and the belt knife (300) maintain a stable contact effect. The knife sharpening mechanism (500) comprises a sanding disc (501), a knife sharpening motor (502), a motor seat (508), a pressure block (509), and a feed adjustment assembly. The sanding disc (501) is mounted on the output shaft of the knife sharpening motor (502). The pressure block (509) is mounted on the other side of the band knife (300). The pressure block (509) cooperates with the sanding disc (501) to prevent the band knife (300) from deforming during grinding. The knife sharpening motor (502) is mounted on the motor seat (508). The feed adjustment assembly maintains and adjusts the relative position of the slide seat (507) and the slide column (506). The adjusting mechanism (600) comprises a cylinder (601), a rotating shaft (604), a core shaft (609), a support seat (608), two sets of adjusting connecting rods (605), a push block (606), and a swing plate (607). The adjusting mechanism (600) is mounted on a base (100). A rotating shaft (604) that can rotate freely and a fixed core shaft (609) are movably connected to the support seat (608). The rotating shaft (604) is connected to the piston rod of the cylinder (601) through a rocker (603). A push block (606) is arranged on the rotating shaft (604). 6); the push block (606) is in the shape of a long strip. When the rotating shaft (604) rotates, the push block (606) is driven to respectively move the adjusting connecting rods (605) of the two adjusting mechanisms (600). The bottom ends of the adjusting connecting rods (605) of the two adjusting mechanisms (600) are connected by springs (610). The top ends of the adjusting connecting rods (605) are fixedly connected with a swing plate (607). The swing plate (607) is sleeved on the core shaft (609) and can rotate relative to the core shaft (609). The swing plate (607) is connected to the slide seat (507) of the sharpening mechanism (500).

2. The on-line knife sharpening device with an automatically adjustable sanding disc according to claim 1 is characterized in that: The invention also comprises a guide mechanism (700), wherein the guide mechanism (700) has two members and is symmetrically mounted on both sides of the knife sharpening mechanism (500) and the adjustment mechanism (600), each guide mechanism (700) comprises two guide plates (701) symmetrical to the belt knife (300), the guide plates (701) are mounted on a guide bracket (703), one of the guide plates (701) is fixed, and the other guide plate (701) is sleeved on a connecting rod and is movable, and the distance between the two guide plates (701) can be adjusted by a plum blossom knob (702).

3. The on-line knife sharpening device with automatic adjustment of the sanding disc according to claim 2 is characterized by: A sponge (704) is installed on the guide plate (701) of the guide mechanism (700). The sponge (704) is block-shaped and fits the band knife (300). The sponge (704) cleans dust attached to the band knife (300) after grinding.

4. The on-line knife sharpening device with automatic adjustment of the sanding disc according to claim 1 is characterized by: It also includes a cover shell (200), the cover shell (200) covers the knife sharpening mechanism (500) and the adjustment mechanism (600), the cover shell (200) is installed on the base (100), and slots for the belt knife (300) to enter and exit are arranged on both sides of the cover shell (200). The invention also comprises an exhaust pipe (400), which is installed on the cover shell (200). The exhaust pipe (400) is provided with two branch pipes to cooperate with two sand trays (501). The exhaust pipe (400) uses a fan to suck and discharge dust, smoke and particulate matter generated when the sand trays (501) are ground.

5. The on-line knife sharpening device with automatic adjustment of sanding disc according to claim 1 is characterized by: The pressing block (509) is mounted on a bracket fixed on a support seat (608) by means of bolts and nuts. By adjusting the position of the nut on the bolt, the horizontal position of the pressing block (509) can be adjusted to adjust the tightness of contact with the band knife (300).

6. The on-line knife sharpening device with automatic adjustment of sanding disc according to claim 1 is characterized by: A detachable thickening sheet is installed on the inner side of the adjusting connecting rod (605). The thickening sheet thickens the matching part between the adjusting connecting rod (605) and the push block (606) according to the pressure of the cylinder (601), the elastic force of the spring (610), and the grinding contact force to match the deflection adjustment range. The cross-section of the contact between the push block (606) and the adjusting connecting rod (605) is arc-shaped.

7. The on-line sharpening device for a belt knife with an automatic adjustment sand disc according to claim 1 is characterized by: The feed adjustment assembly comprises a disc spring (503), a screw rod (504), a screw hand wheel (505), a slide column (506), and a slide seat (507). The slide seat (507) is fixedly connected to the bottom of the motor seat (508). The slide column (506) is installed at the center of the slide seat (507) and the slide seat (507) can move relative to the slide column (506). The screw rod (504) and the slide column (506) are fixedly connected to the swing plate (607) of the adjustment mechanism (600). A limit plate is arranged on the screw rod (504). A plurality of disc springs (610) are sleeved on the screw rod (504) and contact the limit plate. The screw hand wheel (505) is installed on the screw rod (504). The screw hand wheel (505) locks the connection block of the slide seat (507) on the disc spring (610).

8. The on-line knife sharpening device with automatic adjustment of the sanding disc according to claim 1 is characterized by: The rotating shaft (604) is provided with at least two stop blocks, the stop blocks are detachable, and the stop blocks are used to axially stop the rotating shaft (604).

9. The on-line knife sharpening device with automatic adjustment of the sanding disc according to claim 10 is characterized by: The support seat (608) is plate-shaped and vertically mounted on the base (100). Two through slots are arranged in the support seat (608), a push block (606) is arranged in one of the through slots, and a limit block is arranged in the other through slot. A through hole is arranged at the top of the support seat (608), and the rotating shaft (604) is installed in the through hole.

10. The on-line sharpening device for a belt knife with an automatic adjustment sand disc according to claim 1, characterized in that: A handle (602) is mounted on the rotating shaft (604) of the adjustment mechanism (600). By rotating the handle (602) in the opposite direction, the sand disc (501) can be retracted to adjust the feed adjustment component or to perform maintenance or replace the sand disc (501) online.

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