Positioning device for saw blade machining

Abstract

A positioning device for saw blade machining comprises a supporting table, a bottom box and a connecting box, and the top end of the connecting box is rotationally connected with a fixing structure. The fixing structure comprises an outer box body, an inner box body, a first driving gear, a first driven gear, a first motor and three expansion rods. And a sliding cavity is formed in the outer box body. Three first sliding grooves are formed in the top end of the outer box body. And a cavity is formed in the inner box body. Three second sliding grooves are formed in the top end of the inner box body. A strip-shaped limiting groove is formed in the groove wall of the second sliding groove. And three arc-shaped through grooves are formed in the first driven gear. A pressing plate is fixed to the top end of the expansion rod. The bottom end of the expansion rod sequentially penetrates through the first sliding groove, the second sliding groove and the arc-shaped through groove. And a limiting block is fixed on the expansion rod. A lifting structure is further arranged in the outer box body. According to the saw blade clamping device, the saw blade can be clamped and fixed more quickly and conveniently, the three expansion rods can limit the saw blade and prevent the saw blade from deviating, and the stability of the clamped and fixed saw blade is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of saw blade processing equipment, in particular to a positioning device for saw blade processing. Background Art

[0002] A Chinese patent with authorization announcement number CN212265272U discloses a positioning device for circular saw blade processing, including a boss, a stud is arranged on the top of the boss, the stud is connected to a connecting cover, screw holes are symmetrically arranged on the connecting cover, and a vertical clamping bolt is connected in each screw hole, and a clamping plate is arranged at the bottom of each clamping bolt; a connecting box is arranged at the bottom of the boss, a first connecting block is arranged at the bottom of the connecting box, the bottom of the first connecting block is connected to the sliding block, a nut is arranged in the sliding block, the nut is connected to the screw rod, connecting shafts are arranged at both ends of the screw rod, the sliding block and the screw are both arranged in an inner bottom box, a first slide groove slidably connected to the first connecting block is arranged on the top plate of the bottom box, a scale line is arranged on one side of the first slide groove, the circular saw blade passes through the boss through the middle through hole, the connecting cover is installed on the boss, the clamping bolt is rotated, and the circular saw blade is clamped, which brings convenience to processing.

[0003] When clamping and fixing the saw blade, the worker installs the saw blade on the boss through the through hole thereon, then needs to screw the connection cover onto the stud in a threaded connection manner, and then rotate the clamping bolt until the clamping plate contacts the circular saw blade. The process of clamping and fixing the saw blade is time-consuming and laborious, not convenient enough, and the circular saw blade is only clamped and fixed by pressing the circular saw blade up and down, and the stability of the circular saw blade is also insufficient.

[0004] Therefore, the utility model proposes a technical solution to solve the problem that the process of clamping and fixing the saw blade is time-consuming, labor-intensive, and inconvenient, and the circular saw blade is only clamped and fixed by pressing the circular saw blade up and down, and the stability of the circular saw blade is also insufficient. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a positioning device for saw blade processing, aiming to achieve the technical effect that the circular saw blade can be clamped and fixed more quickly and conveniently, and the circular saw blade is more stable after being clamped and fixed.

[0006] A positioning device for saw blade processing, comprising a support platform, a bottom box and a connection box, wherein the top end of the connection box is rotatably connected with a fixing structure for clamping and fixing the saw blade;

[0007] The fixing structure comprises an outer box body, an inner box body, a first driving gear, a first driven gear, a first motor and three expansion rods;

[0008] The outer box body is provided with a sliding cavity coaxially arranged therewith, and the top of the outer box body is provided with three first sliding grooves communicating with the sliding cavity, and the three first sliding grooves are distributed in a ring array with the center of the sliding cavity as the center;

[0009] The inner box is located in the slide cavity and is arranged concentrically and coaxially with the slide cavity. A cavity is provided inside the inner box and is arranged concentrically and coaxially with the slide cavity. Three second slide grooves communicating with the cavity are provided at the top of the inner box. The three second slide grooves correspond to the three first slide grooves one by one. A strip-shaped limiting groove is provided on the groove wall of the second slide groove. The first driven gear is rotatably connected to the inner center position of the cavity through a pin shaft. Three arc-shaped through grooves are provided on the first driven gear. The three arc-shaped through grooves correspond to the three second slide grooves respectively. The first driving gear is rotatably connected to the inner edge position of the cavity through a pin shaft and meshes with the first driven gear. The first motor is installed inside the cavity to drive the first driving gear to rotate.

[0010] The three expansion rods correspond to the three first slide grooves respectively, the top end of the expansion rod is located above the outer box body and a pressing plate is fixed on the outside thereof, the bottom end of the expansion rod passes through the first slide groove, the first slide groove and the arc-shaped through groove in sequence in a sliding connection manner, and a limiting block for inserting into the strip limiting groove and moving along the strip limiting groove is fixed on the expansion rod;

[0011] The outer box body is also provided with a lifting structure for driving the inner box body to move up and down in the sliding cavity.

[0012] By adopting the above technical solution, the saw blade is placed on the top of the outer box body, and is sleeved on the outside of the three expansion rods through the through holes on the outer box body. After the saw blade is placed, it is supported by the outer box body, and the tops of the three expansion rods all pass through the through holes on the saw blade, and the clamping plate is located above the saw blade. Then the first motor is started, and the output shaft of the first motor rotates to drive the first driving gear to rotate. The first driving gear drives the first driven gear meshed with it to rotate. The first driven gear drives the expansion rod to move along the second slide groove and the first slide groove through the arc through groove. When the expansion rod moves, the limit block moves in the strip limit groove, and the setting of the limit block and the strip limit groove can prevent the expansion rod from falling off. The three expansion rods move outward synchronously at the same time until the three expansion rods are all in contact with the hole wall of the through hole on the saw blade. Then the inner box body is moved downward by the lifting structure, and the inner box body drives the expansion rod to move downward. The expansion rod drives the clamping plate to move downward. The saw blade is clamped between the clamping plate and the outer box body. The utility model can clamp and fix the saw blade more quickly and conveniently, and the three expansion rods can limit the saw blade, prevent the saw blade from deflecting, and improve the stability of the circular saw blade after being clamped and fixed.

[0013] A further configuration of the utility model is that a limiting piece is fixed to the bottom end of the expansion rod.

[0014] By adopting the above technical solution, the setting of the limiting piece further improves the stability of the tensioning rod when it moves.

[0015] A further configuration of the utility model is that the external fixing sleeve of the expansion rod is provided with a rubber sleeve.

[0016] By adopting the above technical solution, the provision of the rubber sleeve can prevent the expansion rod and the saw blade from being damaged by collision and friction.

[0017] The utility model is further configured as follows: a buffer plate is provided at the bottom end of the clamping plate, a buffer rod is fixed to the top end of the buffer plate, the top end of the buffer rod passes through the clamping plate in a sliding connection and is fixed with a clamping block, and a spring sleeved on the outside of the buffer rod is fixedly connected between the clamping plate and the buffer plate.

[0018] By adopting the above technical solution, the pressing plate drives the buffer plate to move downward. After the buffer plate contacts the saw blade, the spring is compressed to form a buffering effect. The arrangement of the buffer plate can prevent the saw blade from being damaged by clamping.

[0019] Further configuration of the utility model: the lifting structure includes an installation cavity, a rotating shaft, a second motor and two screw rods. The installation cavity is opened in the outer box body and is located below the sliding cavity. The rotating shaft is rotatably connected to the installation cavity. The external fixed sleeve of the rotating shaft is provided with two second driving gears. The second motor is installed on the outer side wall of the outer box body to drive the rotating shaft to rotate. The two screw rods are rotatably connected to the sliding cavity. The bottom ends of the two screw rods are inserted into the installation cavity and are fixed with second driven gears meshing with the second driving gear. The outsides of the two screw rods are slidably sleeved with nut seats located in the sliding cavity in a threaded connection manner. The inner box body is fixedly connected between the two nut seats.

[0020] By adopting the above technical solution, when the lifting structure is required to drive the inner box to move up and down, the second motor is started. The output shaft of the second motor rotates to drive the rotating shaft to rotate. The rotating shaft drives the second driving gear fixedly connected thereto to rotate. The second driving gear drives the second driven gear meshed therewith to rotate. The second driven gear drives the screw rod fixedly connected thereto to rotate. The screw rod drives the nut seat to move up and down. The nut seat drives the inner box to move up and down.

[0021] Further configuration of the utility model: the lifting structure includes an electric telescopic rod, two guide rails and two sliding blocks, the two guide rails are fixed in the sliding cavity, the two sliding blocks are respectively slidably mounted on the outside of the two guide rails, the inner box is fixedly connected between the two sliding blocks, the electric telescopic rod is installed on the inner bottom wall of the sliding cavity, and the piston rod of the electric telescopic rod is vertically upward and fixedly connected to the bottom end of the inner box.

[0022] By adopting the above technical solution, when the lifting structure is required to drive the inner box to move up and down, the electric telescopic rod is started. The piston rod of the electric telescopic rod is extended and retracted to drive the inner box to move up and down. The inner box drives the slider to move up and down along the guide rail, thereby improving the stability of the inner box when it moves up and down.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] A positioning device for saw blade processing. The utility model can clamp and fix the saw blade more quickly and conveniently, and three expansion rods can limit the saw blade, prevent the saw blade from deviating, and improve the stability of the circular saw blade after being clamped and fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a front view of the first embodiment;

[0026] Figure 2 It is a structural schematic diagram of the fixed structure in the first embodiment;

[0027] Figure 3 It is a partial cross-sectional view of the expansion rod, the pressing plate, the buffer plate, the buffer rod, the spring and the clamping block in the first embodiment;

[0028] Figure 4 is a cross-sectional view of the fixing structure in the first embodiment;

[0029] Figure 5 It is a schematic diagram of the local structure of the fixing structure in the first embodiment;

[0030] Figure 6 It is a top view of the inner box in the first embodiment;

[0031] Figure 7 It is a cross-sectional view of the fixing structure in the second embodiment.

[0032] 1. The first driven gear; 2. The second driven gear; 3. The second driven gear; 4. The first motor; 5. The first expansion rod; 6. The first slide cavity; 7. The first slide groove; 8. The first motor; 9. The first expansion rod; 10. The first slide cavity; 11. The first slide groove; 12. The first expansion rod; 13. The second slide groove; 14. The first expansion rod; 15. The first expansion rod; 16. The first expansion rod; 17. The first expansion rod; 18. The first expansion rod; 19. The first expansion rod; 20. The first expansion rod; 21. The first expansion rod; 22. The first expansion rod; 23. The first expansion rod; 24. The first expansion rod; 25. The second motor; 26. The first expansion rod; 27. The first driven gear; 28. The first driven gear; 29. ​​The first expansion rod; 30. The first expansion rod; 31. The first expansion rod; 32. The first expansion rod; 33. The first expansion rod; 34. The first expansion rod; 35. The first expansion rod; 36. The first expansion rod; 37. The first expansion rod; 38. The first expansion rod; 39. The first expansion rod; 40. The first expansion rod; 41. The first expansion rod; 42. The first expansion rod; 43. The first expansion rod; 44. The first expansion rod; 45. The first expansion rod; 46. The first expansion rod; 47. The first expansion rod; 48. The first expansion rod; 49. The first expansion rod; 50. The first expansion rod; 51. The first expansion rod; 52. The first expansion rod; 53. The first expansion rod; 54. The first expansion rod; 55. The first expansion rod; 56. The first expansion rod; 57. The first expansion rod; 58. The first expansion rod; DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] Embodiment 1:

[0035] A positioning device for saw blade processing, such as Figure 1-Figure 6 As shown, it includes a support table 1, a bottom box 2 and a connection box 3. This embodiment is an improvement on the Chinese patent with authorization announcement number CN212265272U, a positioning device for circular saw blade processing. The above structure can refer to the relevant description in the Chinese patent with authorization announcement number CN212265272U, a positioning device for circular saw blade processing, and will not be described in detail in this embodiment.

[0036] The top end of the connection box 3 is rotatably connected to a fixing structure 33 for clamping and fixing the saw blade.

[0037] The fixing structure 33 includes an outer box body 4 , an inner box body 5 , a first driving gear 6 , a first driven gear 7 , a first motor 8 and three expansion rods 9 .

[0038] A slide cavity 10 is provided inside the outer box body 4 and is coaxially and concentrically disposed therewith. Three first slide grooves 11 communicating with the slide cavity 10 are provided at the top of the outer box body 4. The three first slide grooves 11 are distributed in a ring array with the center position of the slide cavity 10 as the center.

[0039] The inner box body 5 is located in the slide cavity 10 and is arranged concentrically and coaxially with the slide cavity 10. A cavity 12 is arranged concentrically and coaxially with the inner box body 5. Three second slide grooves 13 communicating with the cavity 12 are arranged at the top of the inner box body 5. The three second slide grooves 13 correspond to the three first slide grooves 11 one by one. A bar-shaped limiting groove 14 is arranged on the groove wall of the second slide groove 13. The first driven gear 7 is rotatably connected to the inner center position of the cavity 12 through a pin shaft. Three arc-shaped through grooves 15 are arranged on the first driven gear 7. The three arc-shaped through grooves 15 correspond to the three second slide grooves 13 respectively. The first driving gear 6 is rotatably connected to the inner edge position of the cavity 12 through a pin shaft and meshes with the first driven gear 7. The first motor 8 is installed inside the cavity 12 to drive the first driving gear 6 to rotate.

[0040] The three expansion rods 9 correspond to the three first slide grooves 11 respectively. The top of the expansion rod 9 is located above the outer box body 4 and a clamping plate 16 is fixed to its outer side. A buffer plate 17 is arranged at the bottom end of the clamping plate 16. A buffer rod 18 is fixed to the top end of the buffer plate 17. The top end of the buffer rod 18 passes through the clamping plate 16 in a sliding connection manner and is fixed with a clamping block 19. A spring 20 sleeved on the outside of the buffer rod 18 is fixedly connected between the clamping plate 16 and the buffer plate 17. The bottom end of the expansion rod 9 passes through the first slide groove 11, the first slide groove 11 and the arc-shaped through groove 15 in sequence in a sliding connection manner, and a limiting plate 21 is fixed. The setting of the limiting plate 21 improves the stability of the expansion rod 9 when it moves. A limiting block 22 for inserting into the strip limiting groove 14 and moving along the strip limiting groove 14 is fixed on the expansion rod 9. The outer fixing sleeve of the expansion rod 9 is provided with a rubber sleeve, and the provision of the rubber sleeve can prevent the expansion rod 9 from being damaged by collision and friction with the saw blade.

[0041] The outer box body 4 is also provided with a lifting structure for driving the inner box body 5 to move up and down in the sliding cavity 10 .

[0042] The lifting structure includes an installation cavity 23, a rotating shaft 24, a second motor 25 and two screw rods 26. The installation cavity 23 is opened in the outer box body 4 and is located below the sliding cavity 10. The rotating shaft 24 is rotatably connected to the installation cavity 23. The outer fixed sleeve of the rotating shaft 24 is provided with two second driving gears 27. The second motor 25 is installed on the outer side wall of the outer box body 4 to drive the rotating shaft 24 to rotate. The two screw rods 26 are both rotatably connected to the sliding cavity 10. The bottom ends of the two screw rods 26 are both inserted into the installation cavity 23 and are both fixed with a second driven gear 28 meshing with the second driving gear 27. The outsides of the two screw rods 26 are both slidably sleeved with a nut seat 29 located in the sliding cavity 10 in a threaded connection manner. The inner box body 5 is fixedly connected between the two nut seats 29.

[0043] Working principle:

[0044] The saw blade is placed on the top of the outer box 4, and is sleeved on the outside of the three expansion rods 9 through the through holes thereon. After the saw blade is placed, the saw blade is supported by the outer box 4, and the tops of the three expansion rods 9 all pass through the through holes on the saw blade, and the clamping plate 16 is located above the saw blade.

[0045] Then start the first motor 8, and the output shaft of the first motor 8 rotates to drive the first driving gear 6 to rotate. The first driving gear 6 drives the first driven gear 7 meshing therewith to rotate. The first driven gear 7 drives the expansion rod 9 to move along the second slide groove 13 and the first slide groove 11 through the arc-shaped through groove 15. When the expansion rod 9 moves, the limit block 22 moves in the strip limit groove 14. The setting of the limit block 22 and the strip limit groove 14 can prevent the expansion rod 9 from falling off. The three expansion rods 9 move outward synchronously at the same time until the three expansion rods 9 are in contact with the hole wall of the through hole on the saw blade. It can adapt to saw blades of different specifications.

[0046] Then start the second motor 25. The output shaft of the second motor 25 rotates to drive the rotating shaft 24 to rotate. The rotating shaft 24 drives the second driving gear 27 fixedly connected thereto to rotate. The second driving gear 27 drives the second driven gear 28 meshing therewith to rotate. The second driven gear 28 drives the screw rod 26 fixedly connected thereto to rotate. The screw rod 26 drives the nut seat 29 to move downward. The nut seat 29 drives the inner box body 5 to move downward. The inner box body 5 drives the expansion rod 9 to move downward. The expansion rod 9 drives the clamping plate 16 to move downward. The clamping plate 16 drives the buffer plate 17 to move downward. After the buffer plate 17 contacts the saw blade, the spring 20 is compressed to form a buffering effect. The setting of the buffer plate 17 can prevent the saw blade from being clamped and the saw blade is clamped between the buffer plate 17 and the outer box body 4.

[0047] When the saw blade is processed and needs to be removed, the output shaft of the second motor 25 rotates in the opposite direction to drive the clamping plate 16 and the buffer plate 17 to move upward. Then the output shaft of the first motor 8 rotates in the opposite direction, and the three tension rods 9 are moved synchronously in the opposite direction. The saw blade is no longer fixed and can be easily removed.

[0048] The utility model can clamp and fix the saw blade more quickly and conveniently, and the three expansion rods 9 can limit the saw blade, prevent the saw blade from deflecting, and improve the stability of the circular saw blade after being clamped and fixed.

[0049] Embodiment 2:

[0050] The difference from the first embodiment is that the lifting structure no longer includes the installation cavity 23, the rotating shaft 24, the second motor 25 and the two screw rods 26. Figure 7 As shown, the electric telescopic rod 30, two guide rails 31 and two sliders 32 are included. The two guide rails 31 are fixed in the slide cavity 10. The two sliders 32 are respectively slidably sleeved on the outside of the two guide rails 31. The inner box 5 is fixedly connected between the two sliders 32. The electric telescopic rod 30 is installed on the inner bottom wall of the slide cavity 10. The piston rod of the electric telescopic rod 30 is vertically upward and fixedly connected to the bottom end of the inner box 5.

[0051] When the lifting structure is required to drive the inner box 5 to move up and down, the electric telescopic rod 30 is activated. The piston rod of the electric telescopic rod 30 is extended and retracted to drive the inner box 5 to move up and down. The inner box 5 drives the slider 32 to move up and down along the guide rail 31, thereby improving the stability of the inner box 5 when moving up and down.

[0052] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0053] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0054] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0055] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A positioning device for saw blade processing, comprising a support platform (1), a bottom box (2) and a connection box (3), Features: The top end of the connection box (3) is rotatably connected to a fixing structure (33) for clamping and fixing the saw blade; The fixing structure (33) comprises an outer box (4), an inner box (5), a first driving gear (6), a first driven gear (7), a first motor (8) and three expansion rods (9); The outer box body (4) has a sliding cavity (10) disposed concentrically and coaxially therewith, and the top of the outer box body (4) has three first sliding grooves (11) communicating with the sliding cavity (10), and the three first sliding grooves (11) are distributed in a ring array with the center of the sliding cavity (10) as the center. The inner box body (5) is located in the slide cavity (10) and is arranged concentrically and coaxially with the slide cavity (10). A cavity (12) arranged concentrically and coaxially with the slide cavity (10) is provided inside the inner box body (5). Three second slide grooves (13) communicating with the cavity (12) are provided at the top of the inner box body (5). The three second slide grooves (13) correspond to the three first slide grooves (11) one by one. A strip-shaped limiting groove (14) is provided on the groove wall of the second slide groove (13). The first driven gear (7) ) is rotatably connected to the inner center position of the cavity (12) through a pin shaft, three arc-shaped through grooves (15) are opened on the first driven gear (7), and the three arc-shaped through grooves (15) correspond to the three second slide grooves (13) respectively, the first driving gear (6) is rotatably connected to the inner edge position of the cavity (12) through a pin shaft, and meshes with the first driven gear (7), and the first motor (8) is installed inside the cavity (12) to drive the first driving gear (6) to rotate; The three expansion rods (9) correspond to the three first slide grooves (11) respectively, the top end of the expansion rod (9) is located above the outer box body (4) and a clamping plate (16) is fixed on the outer side thereof, the bottom end of the expansion rod (9) passes through the first slide groove (11), the first slide groove (11) and the arc-shaped through groove (15) in sequence in a sliding connection manner, and a limiting block (22) for inserting into the strip limiting groove (14) and moving along the strip limiting groove (14) is fixed on the expansion rod (9); The outer box body (4) is also provided with a lifting structure for driving the inner box body (5) to move up and down in the sliding cavity (10).

2. A positioning device for saw blade processing according to claim 1, Features: A limiting plate (21) is fixed to the bottom end of the expansion rod (9).

3. A positioning device for saw blade processing according to claim 2, Features: The outer fixing sleeve of the expansion rod (9) is provided with a rubber sleeve.

4. A positioning device for saw blade processing according to claim 3, Features: A buffer plate (17) is provided at the bottom end of the clamping plate (16), a buffer rod (18) is fixed to the top end of the buffer plate (17), the top end of the buffer rod (18) passes through the clamping plate (16) in a sliding connection manner and is fixed with a clamping block (19), and a spring (20) sleeved on the outside of the buffer rod (18) is fixedly connected between the clamping plate (16) and the buffer plate (17).

5. A positioning device for saw blade processing according to claim 4, Features: The lifting structure comprises an installation cavity (23), a rotating shaft (24), a second motor (25) and two screw rods (26). The installation cavity (23) is opened in the outer box body (4) and is located below the sliding cavity (10). The rotating shaft (24) is rotatably connected to the installation cavity (23). The outer fixed sleeve of the rotating shaft (24) is provided with two second driving gears (27). The second motor (25) is installed on the outer side wall of the outer box body (4) to drive the rotating shaft (24) to rotate. The two screw rods (26) are both rotatably connected to the sliding cavity (10). The bottom ends of the two screw rods (26) are both inserted into the installation cavity (23) and are both fixed with second driven gears (28) meshing with the second driving gears (27). The outer parts of the two screw rods (26) are both slidably sleeved with nut seats (29) located in the sliding cavity (10) in a threaded connection manner. The inner box body (5) is fixedly connected between the two nut seats (29).

6. A positioning device for saw blade processing according to claim 4, Features: The lifting structure comprises an electric telescopic rod (30), two guide rails (31) and two sliding blocks (32); the two guide rails (31) are fixed in the sliding cavity (10); the two sliding blocks (32) are respectively slidably sleeved on the outside of the two guide rails (31); the inner box (5) is fixedly connected between the two sliding blocks (32); the electric telescopic rod (30) is installed on the inner bottom wall of the sliding cavity (10); and the piston rod of the electric telescopic rod (30) is vertically upward and fixedly connected to the bottom end of the inner box (5).

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