Saw blade pressing device and trephine

Abstract

The utility model belongs to the field of trephine, and particularly relates to a saw blade pressing device and a trephine, the saw blade pressing device is used for adjusting the abutting force on a saw blade, the saw blade pressing device comprises a shell, at least one guide roller and at least one auxiliary roller are arranged in the shell, and the auxiliary roller is rotatably arranged on one side of the guide roller; the shell is provided with an adjusting assembly, the adjusting assembly comprises a worm, a worm gear and a cam piece, the cam piece and the worm gear are coaxially arranged, the cam piece is provided with an eccentric part, the eccentric part is coaxially provided with the auxiliary roller, the worm and the worm gear are matched to drive the cam piece to rotate, and the eccentric part drives the auxiliary roller to eccentrically rotate. The auxiliary roller moves relative to the guide roller so as to adjust the size of the clamping piece space, the eccentric part and the auxiliary roller are coaxially arranged, the eccentric arrangement of the eccentric part enables the auxiliary roller and the worm wheel to be in a non-coaxial state, the pressing force on the saw blade is accurately changed, the stepless adjustment and continuous maintaining functions of the pressing force are achieved, and safety is improved.

Description

Technical Field

[0001] This technical solution relates to the field of ring saw technology, specifically to a saw blade clamping device and a ring saw. Background Technology

[0002] A ring saw is a cutting tool characterized by its ring-shaped saw teeth. It achieves precise drilling or cutting through a high-speed rotating ring blade and is suitable for woodworking, metal processing, and construction. Modern ring saws are mostly electrically driven, with adjustable diameter and speed, combining high efficiency and safety to meet the precision operation needs of various scenarios.

[0003] For example, Chinese patent CN115351925A discloses an eccentric ring saw, including a base plate and a dovetail lifting assembly. The bottom of the dovetail slider of the dovetail lifting assembly is connected to a fixed shaft. An eccentric ring saw blade assembly and a mounting bracket are provided on the fixed shaft. The eccentric ring saw blade assembly includes an eccentric disc and a ring saw blade connected to the outer ring of the eccentric disc through a bearing roller assembly. By installing the fixed shaft off-center from the center of the eccentric disc, the cutting depth can reach more than the radius of the ring saw blade. The eccentric disc, the bearing roller assembly, and the ring saw blade form a bearing-type structure, that is, the inner ring is fixed and the outer ring rotates.

[0004] The saw blade clamping in existing eccentric ring saws uses an eccentric structure as the adjustment unit, which uses two drive wheels for clamping. When the equipment vibrates at high frequency or the load changes suddenly, the eccentric structure is prone to self-rotation deviation (i.e., "slippage") due to the lack of a rigid locking mechanism, which causes dynamic changes in the distance between the two drive wheels. The saw blade will also experience axial movement due to the fluctuation of clamping force, which will aggravate the wear of the saw teeth and even break them. This poses a great danger and low safety, and needs to be improved. Summary of the Invention

[0005] This technical solution aims to improve the problem of slippage and pressure fluctuation caused by the lack of rigid locking of the two drive wheels in the saw blade clamping device, resulting in low safety. It provides a saw blade clamping device and a ring saw.

[0006] The purpose of this technical solution is achieved as follows:

[0007] A saw blade clamping device for adjusting the pressure applied to the saw blade includes a housing. The housing contains at least one guide roller and at least one auxiliary roller. The auxiliary roller is rotatably arranged on one side of the guide roller, forming a clamping space for the ring saw blade to pass through. The housing includes an adjusting assembly comprising a worm gear, a worm wheel, and a cam. The cam is coaxially arranged with the worm wheel and has an eccentric portion. The auxiliary roller is coaxially arranged on the eccentric portion. The worm gear and worm wheel cooperate to drive the cam to rotate, causing the eccentric portion to drive the auxiliary roller to rotate eccentrically. The auxiliary roller moves relative to the guide roller to adjust the size of the clamping space.

[0008] Through the above technical solution, when a saw blade clamping device is in normal use, the guide roller and auxiliary roller inside the housing are respectively located on both sides of the saw blade cutting plane to form a clamping guide. The rotating worm drives the meshing worm wheel to rotate, and the cam component connected coaxially with the worm wheel rotates accordingly. Based on the coaxial arrangement of the eccentric part with the auxiliary roller and the worm wheel with the cam component, the eccentric setting of the eccentric part makes the auxiliary roller and the worm wheel non-coaxial. The eccentric part of the cam component drives the auxiliary roller to move relative to the guide roller, thereby dynamically adjusting the clamping gap of the clamping space and precisely changing the clamping force on the saw blade between the two. Moreover, the self-locking characteristic of the worm gear transmission mechanism is used to achieve rigid locking of the clamping force, maintaining a stable output of the clamping force. Through the continuous adjustment of the cam component structure and the optimization of the contact pressure of the saw blade, the clamping force is ensured to remain dynamically stable during sawing operations, thereby realizing the stepless adjustment and continuous maintenance function of the clamping force and improving safety.

[0009] Preferably, the housing is provided with a mounting cavity, which includes a first mounting cavity for mounting the adjustment assembly and a second mounting cavity for mounting the guide roller;

[0010] The cam component includes an eccentric part, a fixed mounting part, and a connecting part. The fixed mounting part is disposed between the eccentric part and the connecting part. The cam component is installed in the mounting cavity through the fixed mounting part. The connecting part is coaxially and fixedly connected to the worm gear. The worm gear is coaxially fixed on the connecting part.

[0011] Through the above technical solution, the housing achieves modular positioning of the adjustment component and the guide roller through a cavity structure with separate mounting cavity one and mounting cavity two. The connecting part is locked coaxially with the worm wheel. The worm drives the worm wheel to rotate the cam component around the axis of the fixed mounting part. The eccentric trajectory of the eccentric part drives the auxiliary roller to move along the cutting plane of the saw blade. The coordinated mechanism of mechanical locking and dynamic adaptation ensures stable output of clamping force and ensures normal operation.

[0012] Preferably, the mounting cavity has an opening 1 and an opening 2 connected to opposite end faces. The mounting part is engaged in the opening 1, and a plug is installed in the opening 2. The plug is provided with a positioning groove, which is located on the end face of the plug along the side embedded in the opening 2, for the end of the connecting part to be embedded.

[0013] The plug is provided with a connecting shaft, and the connecting part is provided with a shaft hole one corresponding to the connecting shaft. The plug is provided with a shaft hole two, and the connecting shaft passes through the shaft hole one and the shaft hole two to achieve axial positioning.

[0014] Through the above technical solution, the end of the connecting part is embedded in the positioning groove, and the cooperation with the connecting shaft through the shaft hole forms a double positioning constraint, which improves the anti-interference ability. The two ends of the mounting cavity are used to fix the fixed part of the cam component and the plug-connecting shaft assembly, respectively. The fixed part of the cam component is engaged with the first opening, the plug closes the second opening and fixes the connecting shaft. The connecting part cooperates with the front end of the connecting shaft through the shaft hole to form an axially constrained rotational support. During operation, the worm gear drives the cam component to rotate stably around the connecting shaft. The eccentric part accurately transmits the lift to the auxiliary roller as the cam rotates, ensuring the linearity and consistency of the eccentric driving force transmission, reducing the clamping force fluctuation caused by vibration, and improving the clamping stability and structural anti-displacement ability.

[0015] Preferably, the fixed part has a first clearance ring groove on the side near the connecting part, and a second clearance ring groove is provided on the corresponding side of the plug head. The first clearance ring groove and the second clearance ring groove cooperate to provide clearance for the worm gear.

[0016] Through the above technical solution, a first clearance ring groove is provided on the side of the fixed assembly near the connecting part, and a second clearance ring groove is provided at the corresponding position of the plug. After assembly, the two ring grooves form a continuous clearance space, providing radial clearance for the meshing area of ​​the worm and worm wheel, optimizing the worm layout space, eliminating transmission resistance or vibration caused by structural interference, and enhancing structural reliability and compactness.

[0017] Preferably, the auxiliary roller includes a locking nut, a rotating screw, a roller bushing sleeved on the rotating screw, and at least one bearing. The rotating screw is rotatably disposed relative to the housing, and the locking nut is connected to the rotating screw.

[0018] The eccentric part has a mounting groove on the side facing away from the fixed part. The bearing abuts against the inner wall of the mounting groove. The rotating screw passes through the bearing. The front end of the eccentric part is correspondingly embedded in the opening on the rear side of the roller bushing. The rotating screw rotates under the action of external force, driving the roller bushing to rotate.

[0019] Through the above technical solution, the rotating screw carries the inserted roller bushing and bearing into the mounting groove, and the bearing abuts against the inner wall of the groove. The front end of the eccentric part is inserted into the opening of the roller bushing. The locking nut locks the roller bushing and the screw to form an axial fixation, preventing the roller bushing from axially loosening. When the roller bushing abuts against the side of the saw blade, the saw blade drives the roller bushing to rotate. The rotating screw is affected by the external force and rotates synchronously. The bearing bears the radial load and reduces friction. The rotating screw drives the roller bushing to rotate synchronously, reducing wear and improving rotation smoothness, ensuring normal operation.

[0020] Preferably, the worm gear is provided with a screwing head, which is coaxially fixed to the end of the worm gear;

[0021] The worm gear is provided with at least one bearing, which is sleeved on the periphery of the worm gear and abuts against the inner wall of the mounting cavity.

[0022] The above technical solution provides a manual drive interface by coaxially fixing a screw head at the end of the worm gear. The bearing two sleeved around the worm gear abuts against the inner wall of the mounting cavity to form radial support. The rolling friction support achieves low-resistance rotation, driving the worm wheel to rotate precisely and increasing the durability of dynamic locking.

[0023] A ring saw includes a housing, the housing comprising a casing and a cover disposed thereon, and further includes a saw blade clamping device as described in any of the preceding claims, and further includes:

[0024] A drive component, mounted on the housing, is used to drive the drive wheel;

[0025] A drive wheel, which is rotatably mounted on the housing, is connected to the output end of the drive component and is used to drive the saw blade in the cutting plane.

[0026] Through the above technical solution, the ring saw integrates the saw blade clamping device and drive system through the housing. The output end of the drive component is connected to the drive wheel. The drive wheel drives the saw blade to rotate in the cutting plane. The clamping structure forms a rigid clamping space. The worm gear turning head drives the worm wheel-cam assembly to adjust the clamping force. The linkage mechanism dynamically maintains the stability of the saw blade clamping force, avoids saw blade deviation or slippage caused by vibration during high-speed cutting, improves drive efficiency and cutting accuracy, and enhances operational reliability.

[0027] Preferably, a receiving space for receiving a ring saw blade is formed between the housing and the cover, and the receiving space is correspondingly connected to the mounting cavity, so that the drive wheel, guide roller and auxiliary roller are arranged in the receiving space.

[0028] Through the above technical solution, the drive wheel, guide roller and auxiliary roller are centrally arranged in the accommodating space. The accommodating space and the mounting cavity are connected to form an integrated unit. The drive wheel is driven to rotate by the drive component, which drives the ring saw blade to move along the cutting plane in the accommodating space. The auxiliary roller adjusts the clamping force with the guide roller through the linkage of worm gear-worm wheel-cam. The guide roller helps to constrain the lateral displacement of the saw blade.

[0029] Preferably, the cover has a clearance cavity at the position corresponding to the mounting cavity.

[0030] Through the above technical solution, during the installation of the cover, the cavity layout of the clearance cavity is precisely matched with the guide roller and auxiliary roller, avoiding interference with the inner wall of the cover, maintaining the overall protective effect of the cover on the internal components, and reducing the risk of wear caused by the intrusion of external impurities.

[0031] The key and beneficial technical effects of this technical solution compared to existing technologies are:

[0032] 1. This technical solution is successful. By driving the worm gear and coaxial cam to rotate, the swing end drives the auxiliary roller to dynamically adjust the size of the clamping space to change the clamping gap of the saw blade. Combined with the self-locking characteristics of the worm gear, the clamping force is rigidly locked. With the help of the guide roller and auxiliary roller clamping on both sides, the clamping force of the saw blade is continuously adjustable and stable, thus improving safety. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0034] Figure 2 This is a partial cross-sectional view of this embodiment;

[0035] Figure 3 This embodiment Figure 2 Enlarged view of a portion;

[0036] Figure 4 This is another partial cross-sectional view of this embodiment;

[0037] Figure 5 As in the embodiments Figure 4 Enlarged view of a portion;

[0038] Figure 6 This is a partial structural diagram of the circular saw blade, which is omitted in the embodiment.

[0039] Figure 7 This embodiment Figure 6 Schematic diagram of a partial explosion;

[0040] Figure 8 This is a schematic diagram of the overall structure of the auxiliary roller and the adjustment component in the embodiment;

[0041] Figure 9 This embodiment Figure 8 Enlarged view of a portion of the diagram.

[0042] Reference numerals: 1. Machine housing; 11. Housing; 12. Cover; 2. Guide roller; 3. Auxiliary roller; 31. Locking nut; 32. Rotating screw; 33. Roller bushing; 34. Bearing one; 4. Adjusting assembly; 41. Worm; 42. Worm wheel; 43. Cam component; 431. Eccentric part; 432. Fixed mounting part; 433. Connecting part; 5. Clamping space; 61. Mounting cavity one; 62. Mounting cavity two; 7. Opening one; 8. Opening two; 9. Plug; 10. Connecting shaft; 131. Shaft hole one; 132. Shaft hole two; 14. Positioning groove; 15. Clearance ring groove one; 16. Clearance ring groove two; 17. Mounting groove; 18. Tightening head; 19. Bearing two; 20. Drive component; 21. Drive wheel; 22. Accommodation space; 23. Relief cavity; 100. Ring saw blade. Detailed Implementation

[0043] The specific implementation of this technical solution will be further described in detail below with reference to the accompanying drawings.

[0044] Example:

[0045] See Figure 6 and Figure 7 A saw blade clamping device includes a housing 11 with an installation cavity. The installation cavity includes a first installation cavity 61 and a second installation cavity 62. An adjustment component 4 is installed in each first installation cavity 61, and a guide roller 2 is installed in each second installation cavity 62. An auxiliary roller 3 is rotatably arranged on one side of the guide roller 2, and the guide roller 2 is rotatably arranged on the opposite side of the saw blade cutting plane, so that the auxiliary roller 3 and the guide roller 2 are located on symmetrical sides of the saw blade along the cutting plane to form a clamping and positioning of the saw blade. A clamping space 5 for the ring saw blade 100 to pass through is formed between the auxiliary roller 3 and the corresponding guide roller 2.

[0046] See Figure 7 and Figure 8 The adjusting assembly 4 includes a worm 41, a worm wheel 42, and a cam 43. The mounting cavity 61 has openings 7 and 8 on opposite end faces. The worm wheel 42 is installed into the mounting cavity 61 through one side of opening 7. The worm 41 is installed in the mounting cavity 61 and rotatably mounted on one side of the worm wheel 42. Its circumferential threaded structure meshes with the worm wheel 42. A screwing head 18 is connected to the upper end of the worm 41. By operating the screwing head 18, the worm 41 is rotated in a counterclockwise or clockwise direction, causing the worm wheel 42 to rotate in the same direction. The cam 43 is coaxially mounted with the worm wheel 42 and can be coaxially fixed by a key connection. The worm wheel 42 drives the cam 43 to rotate synchronously.

[0047] The worm 41 is also provided with a second bearing 19. There are two second bearings 19, which are sleeved on the upper end of the worm 41 near the screwing head 18. The second bearing 19 abuts against the inner wall of the mounting cavity 61 to guide the worm 41 inside to rotate.

[0048] See Figure 3 , Figure 5 and Figure 9 The cam component 43 includes an eccentric portion 431, a fixed mounting portion 432, and a connecting portion 433. The fixed mounting portion 432 is disposed between the eccentric portion 431 and the connecting portion 433. The connecting portion 433 is inserted into the mounting cavity 61 through the opening 7. The worm gear 42 is sleeved and fixed on the connecting portion 433. The fixed mounting portion 432 protrudes relative to the connecting portion 433 and is able to engage at the opening 7. The eccentric portion 431 is eccentrically positioned relative to the fixed mounting portion 432, and its position is offset from the rotation axis of the cam component 43. An auxiliary roller 3 is connected to the side of the core 431 away from the fixed mounting part. The eccentric part 431 and the auxiliary roller 3 are coaxially arranged so that when the cam 43 rotates, the eccentric part 431 drives the auxiliary roller 3 to move synchronously. The auxiliary roller 3 moves relative to the guide roller 2 to adjust the size of the clamping space 5: when the auxiliary roller 3 moves closer to the guide roller 2, it reduces the clamping space 5 and increases the pressure on the ring saw blade 100 on the side facing the guide roller 2; when the auxiliary roller 3 moves away from the guide roller 2, it expands the clamping space 5 and reduces the pressure on the ring saw blade 100.

[0049] A plug 9 is provided at the second opening 8. The end face of the plug 9, which is embedded in the second opening 8, has a positioning groove 14. The end of the connecting part 433 that passes through the turbine can be embedded in the matching positioning groove 14. The connecting part 433 has a shaft hole 131, which is located on the side of the connecting part 433 away from the fixed part 432. The plug 9 has a shaft hole 2 132 at the corresponding position. The shaft hole 2 132 is aligned with the shaft hole 131. The plug 9 is provided with a connecting shaft 10. The connecting shaft 10 can pass through the shaft hole 2 132 and the shaft hole 131 and connect with the plug 9 to fix the plug 9.

[0050] The mounting part 432 has a first clearance ring groove 15 on the side near the connecting part 433, and the plug head 9 has a second clearance ring groove 16 on the corresponding side, such as Figure 6 As shown, the first clearance ring groove 15 and the second clearance ring groove 16 face each other, providing clearance for the meshing part of the worm 41 and the worm wheel 42.

[0051] The auxiliary roller 3 includes a locking nut 31, a rotating screw 32, a roller bushing 33, and at least one bearing 34. The rotating screw 32 passes through one side of the bearing 34 and the roller bushing 33 in sequence. The locking nut 31 is connected to the end of the rotating screw 32 along the passing direction to prevent the bearing 34 and the roller bushing 33 from disengaging from the rotating screw 32. The eccentric part 431 is provided with a mounting groove 17, which is located on the side end face of the eccentric part 431 opposite to the fixed mounting part 432. The auxiliary roller 3 is installed in the mounting groove 17, and each bearing 34 abuts against the inner wall of the mounting groove 17. The front end of the eccentric part 431 is correspondingly embedded in the opening on the rear side of the roller bushing 33. The rotating screw 32 rotates under the action of external force, so that the roller bushing 33 can rotate.

[0052] The specific work process of this plan is as follows:

[0053] This technical solution uses guide rollers 2 and auxiliary rollers 3, located inside the housing 11, to form a clamping guide on both sides of the saw blade cutting plane. A rotating worm gear 41 drives a meshing worm wheel 42 to rotate, causing a cam 43 coaxially connected to the worm wheel 42 to rotate accordingly. The swing end of the cam 43 moves the auxiliary rollers 3 closer to or further away from the saw blade cutting plane, dynamically adjusting the clamping gap of the clamping space 5. This allows for precise changes in the clamping force on the saw blade. Furthermore, the self-locking characteristic of the worm wheel 42 and worm gear 41 transmission mechanism achieves rigid locking of the clamping force, maintaining a stable output. Through continuous adjustment of the cam 43 structure and optimization of the saw blade contact pressure, the clamping force remains dynamically stable during sawing operations, achieving stepless adjustment and continuous holding of the clamping force, thus improving safety.

[0054] See Figure 1 and Figure 4 A ring saw includes a housing 1, which includes a shell 11 and a cover 12. A ring saw blade 100 is mounted on the front side of the housing 1. The ring saw blade 100 is flat and has an annular shape. The ring saw blade 100 is rotatably disposed relative to the housing 1. In this embodiment, two sets of mounting cavities are shown, and the two sets of mounting cavities are distributed at intervals along the outer arc of the circular saw blade 100.

[0055] It also includes a drive component 20 and a drive wheel 21. The drive component 20 is installed on the side of the housing 11 away from the installation position of the ring saw blade 100. The drive component 20 is preferably a motor. The drive wheel 21 is rotatably mounted on the housing 11 and is connected to the output end of the drive component 20. The cover 12 is fixedly connected to the machine housing 1 by bolts, and a receiving space 22 is formed between the cover 12 and the machine housing 1 for the side of the ring saw blade 100 to pass through, so as to avoid collision during the cutting operation. The drive wheel 21, the guide roller 2, and the auxiliary roller 3 are arranged in the receiving space 22, so that when the drive component 20 drives the drive wheel 21 to rotate, the drive wheel 21 drives the ring saw blade to rotate, which can cooperate with the guide roller 2 and the auxiliary roller 3 arranged on both sides to guide the rotation of the ring saw blade 100. The cover 12 is provided with a relief cavity 23, which is set one-to-one with the position of the mounting cavity, and is used to cover the part of the auxiliary roller 3 exposed in the mounting cavity 61.

[0056] The foregoing has shown and described the basic principles, main features, and advantages of this technical solution. Those skilled in the art should understand that this technical solution is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this technical solution. Various changes and modifications can be made to this technical solution without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed technical solution. The scope of protection of this technical solution is defined by the appended claims and their equivalents.

Claims

1. A saw blade clamping device for adjusting the pressure applied to a saw blade, comprising a housing (11), wherein at least one guide roller (2) and at least one auxiliary roller (3) are provided inside the housing (11), the auxiliary roller (3) being rotatably arranged on one side of the guide roller (2) to form a clamping space (5) for the ring saw blade to pass through, characterized in that: The housing (11) is provided with an adjustment assembly (4), which includes a worm (41), a worm wheel (42), and a cam (43). The cam (43) is coaxially arranged with the worm wheel (42). The cam (43) has an eccentric part (431). The auxiliary roller (3) is coaxially arranged on the eccentric part (431). The worm (41) and the worm wheel (42) cooperate to drive the cam (43) to rotate, so that the eccentric part (431) drives the auxiliary roller (3) to rotate eccentrically. The auxiliary roller (3) moves relative to the guide roller (2) to adjust the size of the clamping space (5).

2. The saw blade clamping device according to claim 1, characterized in that: The housing (11) is provided with a mounting cavity, which includes a mounting cavity one (61) for mounting the adjustment assembly (4) and a mounting cavity two (62) for mounting the guide roller (2); The cam component (43) includes the eccentric part (431), the fixed part (432), and the connecting part (433). The fixed part (432) is disposed between the eccentric part (431) and the connecting part (433). The cam component (43) is installed in the mounting cavity (61) through the fixed part (432). The worm gear (42) is coaxially fixed on the connecting part (433).

3. The saw blade clamping device according to claim 2, characterized in that: The mounting cavity 1 (61) has opening 1 (7) and opening 2 (8) connected to opposite end faces. The fixed part (432) is engaged in opening 1 (7). The opening 2 (8) is equipped with a plug (9). The plug (9) is provided with a positioning groove (14). The positioning groove (14) is provided on the end face of the plug (9) along the side embedded in the opening 2 (8) for the end of the connecting part (433) to be embedded. The plug (9) is provided with a connecting shaft (10), and the connecting part (433) is provided with a shaft hole one (131) corresponding to the connecting shaft (10). The plug (9) is provided with a shaft hole two (132) accordingly. The connecting shaft (10) passes through the shaft hole one (131) and the shaft hole two (132) to achieve axial positioning.

4. A saw blade clamping device according to claim 3, characterized in that: The mounting part (432) has a first clearance ring groove (15) on the side near the connecting part (433), and a second clearance ring groove (16) is provided on the corresponding side of the plug (9). The first clearance ring groove (15) and the second clearance ring groove (16) cooperate to provide clearance for the worm (41).

5. A saw blade clamping device according to claim 2, characterized in that: The auxiliary roller (3) includes a locking nut (31), a rotating screw (32), a roller bushing (33) sleeved on the rotating screw (32), and at least one bearing (34). The rotating screw (32) is rotatably disposed relative to the housing (11), and the locking nut (31) is connected to the rotating screw (32). The eccentric part (431) has a mounting groove (17) on the side face away from the fixed part (432). The bearing (34) abuts against the inner wall of the mounting groove (17). The rotating screw (32) passes through the bearing (34). The front end of the eccentric part (431) is correspondingly embedded in the opening on the rear side of the roller bushing (33). The rotating screw (32) rotates under the action of external force, driving the roller bushing (33) to rotate.

6. A saw blade clamping device according to claim 2, characterized in that: The worm (41) is provided with a screw head (18), which is coaxially fixed to the end of the worm (41); The worm (41) is provided with at least one bearing (19), which is sleeved on the periphery of the worm (41) and abuts against the inner wall of the mounting cavity (61).

7. A ring saw, comprising a housing (1), the housing (1) including the shell (11) and a cover (12) disposed on the shell (11), characterized in that, It also includes a saw blade clamping device according to any one of claims 1 to 6, further comprising: A drive unit (20), which is mounted on the housing (11), is used to drive the drive wheel; A drive wheel (21) is rotatably mounted on the housing (11). The drive wheel (21) is connected to the output end of the drive unit (20) and is used to drive the saw blade in the cutting plane.

8. A ring saw according to claim 7, characterized in that: A receiving space (22) for receiving a ring saw blade (100) is formed between the housing (11) and the cover (12). The receiving space (22) is correspondingly connected to the mounting cavity of the housing (11), so that the drive wheel (21), the guide roller (2) and the auxiliary roller (3) are arranged in the receiving space (22).

9. A ring saw according to claim 8, characterized in that: The cover (12) is provided with a relief cavity (23) corresponding to the mounting cavity of the housing (11).

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