CN115741888B - Clamping mechanism of band saw machine and band saw machine - Google Patents

Abstract

The invention discloses a clamping mechanism of a band saw machine and the band saw machine, which belong to the technical field of woodworking band saw machines and comprise a processing table, wherein vertical baffle plates with different heights are arranged on two sides of the processing table, first sliding rails are arranged at two ends of the side wall of each vertical baffle plate, a 匚 -shaped supporting frame is arranged above the processing table, the 匚 -shaped supporting frame is in sliding connection with the first sliding rails through a first sliding block, a hydraulic rod is arranged below two end parts of the 匚 -shaped supporting frame, and a plurality of fixing components are arranged between the two 匚 -shaped supporting frames. According to the invention, the wood to be processed is clamped through the clamping mechanism, the clamping plate in the clamping mechanism is moved by utilizing the volume of the wood, so that the length of the contraction spring is changed, the elastic deformation of the contraction spring is promoted, the elasticity is further generated, the movement trend of the clamping plate in the wood direction is promoted by utilizing the elasticity of the contraction spring, and the wood is clamped.

Description

Clamping mechanism of band saw machine and band saw machine

Technical Field

The invention relates to the technical field of woodworking band saws, and in particular to a clamping mechanism of a band saw and the band saw.

Background technique

A band saw machine is a mechanized processing equipment. Its main structures are saw wheels and band saw blades. Depending on the processing object, the band saw machine can be divided into woodworking band saw machines, stone band saw machines, etc. Since the main structures of a band saw machine are band saw blades and saw wheels, the importance of band saw blades and saw wheels is very high. The band saw blade is an endless circular steel belt with teeth on the side, which is put on two saw wheels. The saw wheel moves at high speed under the drive motor to achieve sawing of the workpiece.

The invention patent with the patent application publication number CN110802678A discloses a CNC band saw machine that is convenient for collecting dust, including a fixed seat, a positioning device, a processing table and a second motor, a collection box is arranged on the rear side of the outer shell, and the front side of the collection box is connected to a first vacuum cleaner, a material receiving trough is arranged on the left side of the processing table, and the end of the material receiving trough is arranged above the material collecting box, the material collecting box is connected to the inner bottom of the processing table through a slide, and the slide is arranged at the inner bottom of the processing table, the second vacuum cleaner is connected to a dust suction pipe, and the end of the dust suction pipe away from the second vacuum cleaner is arranged on the front and rear sides of the band saw blade. In the CNC band saw machine that is convenient for collecting dust, the first vacuum cleaner can discharge the dust brought into the outer shell by the band saw blade into the collection box to avoid the long-term accumulation of dust in the outer shell and the influence on its internal components, and the material receiving trough provided in addition can reduce the dust from falling on the workshop floor during the sawing process, and the dust can slide into the collection box through the material receiving trough.

However, it still has many disadvantages in actual use. For example, when fixing the wood, it is simply clamped by a hydraulic rod. As the wood is continuously cut by the band saw, the shape of the wood changes, and the clamping force of the wood needs to be constantly changed to adapt to the arc-shaped surface of the wood. For this reason, we propose a clamping mechanism of a band saw and a band saw to solve the above problems.

Summary of the invention

In order to overcome the above-mentioned defects of the prior art, the present invention provides a clamping mechanism of a band saw machine and a band saw machine, wherein the wood to be processed is clamped by the clamping mechanism, and the volume of the wood itself is used to move the clamping plate in the clamping mechanism, thereby changing the length of the contraction spring, causing the contraction spring to undergo elastic deformation, thereby generating an elastic force, and utilizing the elastic force of the contraction spring to cause the clamping plate to produce a movement trend in the direction of the wood, thereby clamping the wood, so as to solve the problems raised in the above-mentioned background technology.

In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a clamping mechanism of a band saw machine, comprising a processing table, vertical baffles of different heights are installed on both sides of the processing table, first slide rails are installed at both ends of the side walls of the vertical baffles, a 匚-shaped support frame is installed above the processing table, the 匚-shaped support frame is slidably connected to the first slide rail through a first slider, hydraulic rods are installed below the two ends of the 匚-shaped support frame, and a plurality of fixing components are installed between the two 匚-shaped support frames;

The wood to be processed can be clamped by the clamping mechanism, making it convenient for the band saw machine to work, thereby cutting the wood into boards of specified thickness.

In a preferred embodiment, the clamping mechanism includes a connecting plate and two clamping plates located inside the 匚-shaped support frame, and contraction springs are connected between the inner ends of the connecting plate and the inner side walls of the 匚-shaped support frame, and support blocks are symmetrically provided on both sides of the clamping plate, and contraction springs are installed between the support blocks and the connecting plates, and through holes are opened at positions of the 匚-shaped support frame corresponding to the contraction springs, and the contraction springs pass through the through holes;

It is convenient to clamp multiple parts of multiple plywood woods, thereby bypassing the bumps on the wood, so as to better fit the surface of the wood, and at the same time, the wood is clamped by the elastic force of the contraction spring.

In a preferred embodiment, the outer side wall of the clamping plate is arranged at a right angle, the inner side wall is arranged in an arc shape, and the inner arc wall of the clamping plate is provided with a plurality of contact strips made of rubber material at equal intervals;

In order to better fit with the surface of the wood, thus achieving a better clamping effect on the wood.

In a preferred embodiment, the fixing assembly includes a pocket strip located between two 匚-shaped support frames, the pocket strip is located between two clamping plates, both ends of the pocket strip are rotatably connected to the clamping plates via a rotating shaft, the pocket strip is composed of a plurality of rotatable clamping pieces and a connecting sleeve, and the clamping pieces and the connecting sleeve are rotatably connected via a rotating shaft;

In order to better fit the curved surface of the wood, a net-like effect can be achieved, which covers the lower surface of the wood and reduces the amplitude of the wood during processing.

In a preferred embodiment, the base comprises a band saw body mounted on the base, a processing table is located above the base, a storage box is mounted inside the processing table, a cleaning mechanism is mounted inside the storage box, and the cleaning mechanism comprises two rotatable rollers;

When the rotating roller rotates, the rotating roller facilitates cleaning of wood chips generated when the wood is cut by the band saw machine, thereby facilitating the band saw machine to process the wood.

In a preferred embodiment, a plurality of groups of cleaning strips are equidistantly arranged on the outer surface of the rotating roller, the number of cleaning strips in each group is set to at least two, each group of cleaning strips is distributed in an array around the circumference of the rotating roller, and the top vertical section of the cleaning strip is set to be trapezoidal;

When the rotating roller rotates, the cleaning strip rotates along with the rotating roller, so that the end of the cleaning strip contacts the surface of the wood, wipes the surface of the wood, and cleans the wood chips generated during processing to the bottom of the wood.

In a preferred embodiment, a cleaning cloth is connected to the top of the cleaning strip, the vertical section of the cleaning cloth is set to be rectangular, the cleaning cloth is a component made of polyethylene material, and the length of the cleaning cloth along the axis of the rotating roller is greater than the length of the cleaning strip along the axis of the rotating roller;

The cleaning cloth has a larger contact area, allowing a larger area of the wood surface to be cleaned.

In a preferred embodiment, both ends of the rotating roller are equipped with reinforcing shafts, a lifting assembly is installed between the reinforcing shaft and the processing table, the lifting assembly is installed on the inner side wall of the processing table, the lifting assembly includes a second slide rail installed on the inner side wall of the processing table, the end of the reinforcing shaft is slidably connected with a second slider, and the reinforcing shaft is slidably connected to the processing table through the second slide rail and the second slider;

In order to facilitate the adjustment of the height of the rotating roller, the cleaning mechanism can better clean the surface of the wood.

In a preferred embodiment, a driving assembly is provided on one side of the rotating roller, and the driving assembly includes a 匚-shaped fixing plate, a rotatable connecting round rod is installed inside the 匚-shaped fixing plate, one end of the connecting round rod passes through the 匚-shaped fixing plate and is connected to a servo motor, two second bevel gears are installed at the position of the connecting round rod corresponding to the rotating roller, and first bevel gears are installed at the positions of the ends of the two rotating rollers corresponding to the positions of the second bevel gears through a rotating shaft, the structures of the first bevel gear and the second bevel gear are meshed, and the rotating shaft connecting the first bevel gear is connected to the L-shaped fixing plate, and the L-shaped fixing plate is fixedly connected to the 匚-shaped fixing plate;

So as to synchronously drive the two rotating rollers to rotate, thereby cleaning the surface of the wood.

In a preferred embodiment, the threads of the two second bevel gears are in opposite directions, and the threads of the two first bevel gears are in opposite directions;

The two rotating rollers rotate in opposite directions so that the drill bits installed above the rotating shaft can contact each other during the rotation process, thereby achieving a mutual cleaning effect.

Compared with the prior art, the present invention has the following beneficial effects:

By setting the overall structure designed in the present invention, compared with the prior art, when the wood to be processed is clamped by the clamping mechanism, the volume of the wood itself is used to move the clamping plate in the clamping mechanism, thereby changing the length of the contraction spring, causing the contraction spring to undergo elastic deformation, thereby generating elastic force, and utilizing the elastic force of the contraction spring to cause the clamping plate to produce a movement trend in the direction of the wood, thereby clamping the wood. Since the amount of elastic deformation of the spring changes according to the volume and weight of the wood itself, the volume and weight of the wood decrease during the process of being cut by the band saw, thereby reducing the deformation of the spring, thereby changing the position of the clamping plate, and thereby still having a good clamping effect on the wood, thereby avoiding the need for staff to manually adjust the clamping force, reducing the workload of staff, reducing the cost of production and processing for the enterprise, and improving work efficiency.

By setting up the pocket strip, compared with the prior art, the pocket strip is composed of a plurality of rotatable clamping pieces and connecting sleeves, and the clamping pieces and the connecting sleeves are rotatably connected via a rotating shaft, so that the pocket strip can better fit the shape of the wood, forming a chain-like effect, thereby holding the wood, and at the same time, because there are gaps between the connecting sleeves and the clamping pieces and the connecting sleeves can rotate, the pocket strip can fit the bumps on the surface of the wood, thereby reducing the shaking generated during wood processing.

By setting a lifting assembly, compared with the prior art, the lifting assembly can be used to adjust the overall height of the cleaning mechanism, so that the cleaning mechanism can clean the wood surface, and by setting a hydraulic rod, the height of the clamping mechanism can be adjusted, so that the clamping mechanism can adjust the height of the wood, so that the band saw machine can cut the wood;

Compared with the prior art, the cleaning mechanism is designed by utilizing two oppositely rotating rollers to drive the cleaning strip and the cleaning cloth to wipe the surface of the wood, thereby cleaning the wood chips generated when the wood is processed by the band saw. At the same time, the two oppositely rotating rollers can drive the cleaning strip and the cleaning cloth to contact each other during rotation, thereby allowing the two cleaning cloths to clean each other, reducing the time staff spend cleaning the cleaning mechanism.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a clamping mechanism of a band saw machine and one side of the overall structure of the band saw machine proposed by the present invention.

FIG. 2 is a schematic diagram of a clamping mechanism of a band saw machine and the other side of the overall structure of the band saw machine proposed by the present invention.

FIG3 is an enlarged view of the structure at point A in FIG2 of the present invention.

FIG. 4 is a schematic structural diagram of the 匚-shaped support frame of the present invention.

FIG. 5 is a schematic structural diagram of the clamping mechanism proposed by the present invention.

FIG. 6 is an enlarged view of the structure at point B in FIG. 5 of the present invention.

FIG. 7 is a schematic diagram of the structure of the present invention after the clamping mechanism is removed.

FIG8 is an enlarged view of the structure at point B in FIG7 of the present invention.

FIG. 9 is a schematic diagram of the structure of the cleaning mechanism proposed by the present invention.

FIG. 10 is a schematic structural diagram of the lifting assembly proposed by the present invention.

In the figure: 1. base; 2. band saw machine body; 3. processing table; 4. vertical baffle; 5. first slide rail; 6. 匚-shaped support frame; 7. hydraulic rod; 8. first slider; 9. connecting plate; 10. contraction spring; 11. through hole; 12. pocket strip; 13. clamping plate; 14. contact strip; 15. support block; 16. connecting slide rod; 17. strengthening shaft; 18. rotating roller; 19. cleaning strip; 20. cleaning cloth; 21. first bevel gear; 22. second bevel gear; 23. L-shaped fixing plate; 24. 匚-shaped connecting plate; 25. connecting round rod; 26. servo motor; 27. second slide rail; 28. second slider; 29. storage box.

Detailed ways

The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

Example 1

As shown in Figures 1-6, a clamping mechanism of a band saw machine includes a processing table 3, vertical baffles 4 of different heights are installed on both sides of the processing table 3, first slide rails 5 are installed at both ends of the side walls of the vertical baffles 4, a 匚-shaped support frame 6 is installed above the processing table 3, the 匚-shaped support frame 6 is slidably connected to the first slide rail 5 through a first slider 8, hydraulic rods 7 are installed below the two ends of the 匚-shaped support frame 6, the output end piston rod of the hydraulic rod 7 is connected to the end bottom wall of the 匚-shaped support frame 6, so that the height of the 匚-shaped support frame 6 is changed by using the hydraulic rod 7, and a number of fixing components are installed between the two 匚-shaped support frames 6.

Specifically, the clamping mechanism includes a connecting plate 9 and two clamping plates 13 located inside the 匚-shaped support frame 6, and the inner ends of the connecting plate 9 are connected to the inner side walls of the 匚-shaped support frame 6 with contraction springs 10, and support blocks 15 are symmetrically arranged on both sides of the clamping plate 13, and the contraction spring 10 is installed between the support block 15 and the connecting plate 9, and the 匚-shaped support frame 6 is provided with through holes 11 at positions corresponding to the contraction springs 10, and the contraction springs 10 pass through the through holes 11, the outer side wall of the clamping plate 13 is arranged at a right angle, and the inner side wall is arranged in an arc shape, and the inner arc wall of the clamping plate 13 is equidistantly provided with a plurality of contact strips 14 made of rubber material;

When clamping, the wood is placed between the two plywoods 13, and the contact strips 14 on the surface of the plywoods 13 are in contact with the surface of the wood, so as not to damage the surface of the wood. Afterwards, since the plywoods 13 squeeze the wood, the plywoods 13 are also squeezed by the wood, causing the two plywoods 13 to move to both sides, causing the support block 15 to drive the connecting plate 9 to move outward through the connecting slide rod 16, so that the contraction spring 10 is stretched, and the contraction spring 10 generates elastic force, which is used to clamp the wood.

In addition, the fixing assembly includes a pocket strip 12 located between two 匚-shaped support frames 6, and the pocket strip 12 is located between two plywoods 13. Both ends of the pocket strip 12 are rotatably connected to the plywoods 13 via a rotating shaft. The pocket strip 12 is composed of a plurality of rotatable clamping plates and connecting sleeves, and the clamping plates and the connecting sleeves are rotatably connected via a rotating shaft. When the plywoods 13 clamp the two sides of the wood, the pocket strip 12 can fit the arc-shaped surface of the wood, thereby achieving a net-like effect, holding the lower surface of the wood, so that the wood will shake less during processing.

Example 2

Referring to the accompanying drawings 1-2 and 7-10 of the specification, it includes a base 1, a band saw machine body 2 is installed above the base 1, and the band saw machine body 2 is a prior art, which will not be described in detail here. A processing table 3 is located above the base 1, and a storage box 29 is installed inside the processing table 3. A cleaning mechanism is installed inside the storage box 29, and the cleaning mechanism includes two rotatable rotating rollers 18, and a plurality of groups of cleaning strips 19 are equidistantly arranged on the outer surface of the rotating roller 18, and the number of each group of cleaning strips 19 is set to at least two, and each group of cleaning strips 19 is distributed in an array around the circumference of the rotating roller 18, and the top vertical section of the cleaning strip 19 is set to be trapezoidal, and the top of the cleaning strip 19 is connected to a cleaning cloth 20, and the vertical section of the cleaning cloth 20 is set to be rectangular, and the cleaning cloth 20 is a member made of polyethylene material, and the length of the cleaning cloth 20 along the axis direction of the rotating roller 18 is greater than the length of the cleaning strip 19 along the axis direction of the rotating roller 18;

When the cleaning mechanism is working, the two rotating rollers 18 rotate towards each other, and the rotating rollers 18 drive the multiple cleaning strips 19 to rotate. When the cleaning strips 19 rotate, they drive the cleaning cloth 20 to rotate, so that the cleaning cloth 20 connected to the end of the cleaning strip 19 contacts the surface of the wood, wipes the surface of the wood, and cleans the wood chips generated during processing to the bottom of the wood. Moreover, since the contact area of the cleaning cloth 20 is larger, the area of the wood surface that is cleaned is larger, which makes it easier to clean the garbage on the surface of the wood into the processing table 3.

It is worth noting that both ends of the rotating roller 18 are equipped with a reinforcing shaft 17, and a lifting assembly is installed between the reinforcing shaft 17 and the processing table 3. The lifting assembly is installed on the inner wall of the processing table 3, and the lifting assembly includes a second slide rail 27 installed on the inner wall of the processing table 3. The end of the reinforcing shaft 17 is slidably connected with a second slider 28. The reinforcing shaft 17 is slidably connected to the processing table 3 through the second slide rail 27 and the second slider 28 to facilitate the adjustment of the height of the rotating roller 18, so that the cleaning mechanism can better clean the surface of the wood. A driving assembly is provided on one side of the rotating roller 18, and the driving assembly includes a 匚-shaped fixing plate 24. The 匚A rotatable connecting rod 25 is installed inside the L-shaped fixing plate 24, one end of the connecting rod 25 passes through the 匚-shaped fixing plate 24 and is connected to a servo motor 26, two second bevel gears 22 are installed at the position of the connecting rod 25 corresponding to the rotating roller 18, and the ends of the two rotating rollers 18 are both installed with first bevel gears 21 through a rotating shaft at the positions corresponding to the second bevel gears 22, the first bevel gears 21 and the second bevel gears 22 are structurally meshed, the rotating shaft connecting the first bevel gears 21 is connected to the L-shaped fixing plate 23, the L-shaped fixing plate 23 is fixedly connected to the 匚-shaped fixing plate 24, the threads of the two second bevel gears 22 are opposite, and the threads of the two first bevel gears 21 are opposite;

The servo motor 26 is started through an external control system, so that the servo motor 26 drives the connecting rod 25 to rotate, and further drives the two second bevel gears 22 to rotate. Since the threads of the two second bevel gears 22 are opposite, when the connecting rod 25 rotates, the second bevel gear 22 drives the first bevel gear 21 to rotate, and the two first bevel gears 21 rotate in opposite directions, so that the two rotating rollers 18 rotate in opposite directions, which further facilitates the cleaning mechanism to clean the surface of the wood; and the two rotating rollers 18 rotate in opposite directions. When the two rotating rollers 18 rotate, the cleaning strips 19 and the cleaning cloth 20 connected to the two rotating rollers 18 can contact each other during the rotation process, thereby achieving the effect of mutual cleaning and reducing the time and energy of manual cleaning of the cleaning mechanism.

The hydraulic rod 7 and servo motor 26 involved in this embodiment can adopt conventional technical means in this field, and the supporting hydraulic system, solenoid valves and pipelines can also be provided by the manufacturer. In addition, the circuits, electronic components and modules involved in the present invention are all existing technologies, which can be fully implemented by those skilled in the art. Needless to say, the content protected by the present invention does not involve improvements to internal structures and methods.

Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. Clamping mechanism of band saw machine, including processing platform (3), its characterized in that: the two sides of the processing table (3) are provided with vertical baffle plates (4) with different heights, the two ends of the side wall of each vertical baffle plate (4) are provided with first sliding rails (5), a 匚 -shaped supporting frame (6) is arranged above the processing table (3), the 匚 -shaped supporting frame (6) is in sliding connection with the first sliding rails (5) through a first sliding block (8), the lower parts of the two ends of the 匚 -shaped supporting frame (6) are provided with hydraulic rods (7), and a plurality of fixing assemblies are arranged between the two 匚 -shaped supporting frames (6);

The fixing assembly comprises a connecting plate (9) and two clamping plates (13) which are positioned on the inner side of a 匚 -shaped supporting frame (6), contraction springs (10) are connected between the two ends of the inner side of the connecting plate (9) and the inner side wall of the 匚 -shaped supporting frame (6), supporting blocks (15) are symmetrically arranged on the two sides of the clamping plates (13), contraction springs (10) are arranged between the supporting blocks (15) and the connecting plate (9), through holes (11) are formed in positions, corresponding to the contraction springs (10), of the 匚 -shaped supporting frame (6), and the contraction springs (10) penetrate through the through holes (11);

The outer side wall of the clamping plate (13) is arranged at right angles, the inner side wall of the clamping plate (13) is arranged in an arc shape, and a plurality of rubber contact strips (14) are arranged on the inner arc wall of the clamping plate (13) at equal intervals;

The fixing assembly comprises a pocket strip (12) located between two 匚 -shaped supporting frames (6), the pocket strip (12) is located between two clamping plates (13), two end portions of the pocket strip (12) are rotatably connected with the clamping plates (13) through rotating shafts, the pocket strip (12) is composed of a plurality of rotatable clamping plates and connecting sleeves, and the clamping plates are rotatably connected with the connecting sleeves through rotating shafts.

2. A band saw machine, characterized in that: the band saw comprises the clamping mechanism and a base (1) as claimed in claim 1, wherein the clamping mechanism is arranged above the base (1), a band saw body (2) is arranged above the base (1), a processing table (3) is arranged above the base (1), a storage box body (29) is arranged in the processing table (3), a cleaning mechanism is arranged in the storage box body (29), and the cleaning mechanism comprises two rotatable rotating rollers (18).

3. The band saw machine of claim 2, wherein: the outer surface of the rotary roller (18) is provided with a plurality of groups of cleaning strips (19) at equal intervals, the number of each group of cleaning strips (19) is at least two, each group of cleaning strips (19) is distributed around the circumferential array of the rotary roller (18), and the vertical section of the top end of each cleaning strip (19) is trapezoidal.

4. A band saw machine according to claim 3, wherein: the top of cleaning strip (19) is connected with cleaning cloth (20), the vertical cross-section of cleaning cloth (20) sets up to the rectangle, cleaning cloth (20) are the component that polyethylene material was made, the length of cleaning cloth (20) along the axial direction of rotating roller (18) is greater than the length of cleaning strip (19) along the axial direction of rotating roller (18).

5. The band saw machine of claim 2, wherein: the two ends of the rotating roller (18) are respectively provided with a reinforcing rotating shaft (17), a lifting assembly is arranged between the reinforcing rotating shafts (17) and the processing table (3), the lifting assembly is arranged on the inner side wall of the processing table (3), the lifting assembly comprises a second sliding rail (27) arranged on the inner side wall of the processing table (3), the end part of the reinforcing rotating shaft (17) is slidably connected with a second sliding block (28), and the reinforcing rotating shaft (17) is slidably connected with the processing table (3) through the second sliding rail (27) and the second sliding block (28).

6. The band saw machine of claim 2, wherein: one side of rotating roller (18) is provided with drive assembly, drive assembly includes 匚 shape fixed plate (24), the internally mounted of 匚 shape fixed plate (24) has rotatable connection round bar (25), the one end of connecting round bar (25) is passed 匚 shape fixed plate (24) and is connected with servo motor (26), two second helical gears (22) are installed in the position department that connects round bar (25) to correspond rotating roller (18), two first helical gear (21) are all installed through the pivot in the position department that the tip of rotating roller (18) corresponds second helical gear (22), the structural engagement of first helical gear (21) and second helical gear (22), L shape fixed plate (23) are connected in the pivot of first helical gear (21), L shape fixed plate (23) and 匚 shape fixed plate (24) fixed connection.

7. The band saw machine of claim 6, wherein: the threads of the two second bevel gears (22) are reversed, and the threads of the two first bevel gears (21) are reversed.