Saw frame

Abstract

A driving saw wheel is installed at one end of the saw frame, a driven saw wheel is installed at the other end of the saw frame, a saw blade is installed on the driving saw wheel and the driven saw wheel, a fast descending rod is arranged on the central axis of the saw blade, the lowest end of the fast descending rod is located below the saw blade, a proximity switch is arranged at the uppermost end of the fast descending rod, and a left guide arm is arranged between the fast descending rod and the driven saw wheel. A right guide arm is arranged between the fast descending rod and the driving saw wheel, a left guide head is arranged at the lower end of the left guide arm and clamped on the saw blade, and a right guide head is arranged at the lower end of the right guide arm and clamped on the saw blade. Due to the fact that the lowermost end of the fast descending rod is located below the saw blade, the fast descending rod can be lifted by the to-be-cut material when making contact with the to-be-cut material, the lifting displacement is sensed by the proximity switch at the uppermost end of the fast descending rod, and the saw blade conducts cutting work downwards after sensing the displacement. The saw blade is prevented from falling too fast and directly impacting the to-be-cut material to be damaged.

Description

Technical Field

[0001] The utility model relates to the technical field related to sawing machine equipment, in particular to a saw frame. Background Art

[0002] At present, in the prior art, the saw blade of the saw frame is affected by the cutting material during the cutting process, and saw dust is generated during the sawing process. The saw dust is easily entangled on the saw teeth of the band saw blade, which not only affects the sawing efficiency but also affects the service life of the saw blade. At the same time, in the prior art, since the feeding speed of the material to be cut cannot be accurately controlled, the saw blade will drop too fast during the downward sawing process and directly impact the material to be cut, causing damage to the blade. For example, a Chinese patent document discloses a high-speed intelligent band saw machine, and its publication number CN214023829U discloses a high-speed intelligent band saw machine, including a bed platform for placing and clamping transport materials; a saw frame, which is arranged above the bed platform, and the saw frame is rotatably connected to a driving wheel and a driven wheel driven by a main servo motor, and a saw band is sleeved on the driving wheel and the driven wheel; a tensioning detection device, which is arranged on the saw frame, and the tensioning detection device is used to detect and adjust the tension of the saw band; a saw back pressure feedback device, which is arranged on the back of the saw band, and the saw back pressure feedback device is used to detect the back pressure of the saw band; a servo lifting drive system, which is connected to the saw frame, and the servo lifting drive system controls the lifting speed of the saw frame through the feedback values ​​of the tension, the back pressure of the saw band and the output torque of the main servo motor, and controls the speed of the main servo motor through the feedback value of the saw frame lifting speed. Utility Model Content

[0003] In order to solve the defects and shortcomings of the prior art, the utility model provides a saw frame, the purpose of which is to clean the saw dust on the saw blade and clean the saw blade, thereby extending the service life of the saw blade and improving the sawing efficiency. At the same time, it is determined by a proximity switch whether the material to be cut has been delivered to the saw blade, so as to control the saw blade to fall smoothly instead of falling quickly, thereby protecting the saw blade from damage caused by a rapid fall.

[0004] To achieve the above-mentioned invention purpose, the technical solution of the utility model is a saw frame, wherein an active saw wheel is installed at one end of the saw frame, and a driven saw wheel is installed at the other end, saw blades are installed on the active saw wheel and the driven saw wheel, a quick-drop lever is provided on the central axis of the saw blade, the lowermost end of the quick-drop lever is located below the saw blade, a proximity switch is provided at the uppermost end of the quick-drop lever, a left guide arm is provided between the quick-drop lever and the driven saw wheel, a right guide arm is provided between the quick-drop lever and the active saw wheel, a left guide head is provided at the lower end of the left guide arm to clamp on the saw blade, and a right guide head is provided at the lower end of the right guide arm to clamp on the saw blade. The active saw wheel and the driven saw wheel fix the saw blade to achieve cutting, and the left guide arm and the right guide arm can move through a slide rail to drive the left guide head and the right guide head to clean the debris on the saw blade. Since the lower end of the quick-drop rod is located below the saw blade, the quick-drop rod will be lifted up by the material to be cut when it contacts the material to be cut. The lifted displacement is sensed by the proximity switch at the upper end of the quick-drop rod. After the sensing, the saw blade moves downward to cut, preventing the saw blade from descending too quickly and directly impacting the material to be cut, causing damage to the saw blade.

[0005] Preferably, a steel brush device is provided between the right guide arm and the active saw wheel, the steel brush device is obliquely fixed on the saw frame, the steel brush device includes a reduction motor, the reduction motor is fixed on a steel brush mounting seat, the steel brush mounting seat is fixed on the front of the saw frame, the reduction motor is connected to a steel brush gear box, one end of the steel brush gear box is connected to the reduction motor and the other end is provided with a universal joint, and a guard is provided obliquely above the steel brush gear box. The steel brush device is used to clean the debris on the saw blade, and the guard is used to protect the steel brush gear box to prevent the cleaned debris from impacting and damaging the steel brush gear box.

[0006] Preferably, the universal joint is connected to the steel brush shaft, a steel brush is arranged at one end of the steel brush shaft away from the universal joint, a swing arm is arranged on the steel brush shaft, the swing arm is located between the universal joint and the steel brush, a steel brush guard is arranged at one end of the swing arm close to the steel brush, a swing arm mounting seat is arranged obliquely above the swing arm, and the swing arm mounting seat is connected to the guard. The swing arm can effectively disperse the force on the steel brush, reduce the generation of concentrated stress, and thus extend the service life of the steel brush and the steel brush shaft.

[0007] Preferably, a shockproof wheel is provided on the side of the left guide head close to the driven saw wheel, and a shockproof wheel is also provided on the side of the right guide head close to the active saw wheel. The shockproof wheel is located on the front side of the saw blade, and a roller bearing is provided on the reverse side of the saw blade corresponding to the shockproof wheel. The roller bearing is cylindrical as a whole. During the sawing process, the shockproof wheel can absorb part of the vibration and reduce the shaking of the saw blade, thereby improving the smoothness and accuracy of the sawing. In addition, the design of the shockproof wheel can also reduce the noise generated during sawing. The roller bearing plays a supporting and guiding role on the back of the saw blade. It can keep the saw blade in linear motion during the cutting process and prevent the saw blade from bending or deviating from the cutting direction. At the same time, the roller bearing also plays a role in reducing friction and improving cutting efficiency.

[0008] Preferably, a guide blade is provided on the side of the left guide head away from the driven saw wheel, and a guide blade is also provided on the side of the right guide head away from the active saw wheel. The guide blade is close to the saw blade, and a guide bracket is provided above the guide blade, and a collar is provided inside the guide bracket. The design of the guide blade close to the saw blade is to ensure the accuracy and straightness of the sawing. By making the guide blade fit closely to the saw blade, the shaking and deviation during sawing can be reduced, ensuring the straightness and smoothness of the cutting. The guide bracket is to provide the stability and support required by the guide blade.

[0009] Preferably, a drag chain is provided at the top of the saw frame, a drag chain bracket is provided at the end of the left guide arm away from the saw blade, a drag chain bracket is also provided at the end of the right guide arm away from the saw blade, and a bend is provided at the upper end of the drag chain bracket, which is stuck in the notch of the drag chain.

[0010] Preferably, a slide rail is provided on the back of the saw frame, and the slide rail is arranged on both sides of the quick-drop rod and is divided into a left slide rail and a right slide rail. The left slide rail is provided with a slider adapted to the left slide rail, and one side of the slider is connected to the left slide rail and the other side is connected to the left guide arm. The slider and the slide rail cooperate to realize the left and right reciprocating motion of the left guide arm and the right guide arm.

[0011] Preferably, a saw band tensioning device is provided on the back of the saw frame corresponding to the driven wheel, a driven wheel shaft is provided at the center of the driven wheel, and the saw band tensioning device includes a tensioning cylinder, the tensioning cylinder is connected to a tensioning slider, and a hole is provided in the middle of the tensioning slider and connected to the driven wheel shaft. The saw band tensioning device can adjust the tension of the saw band to ensure that the saw band remains in an appropriate tension state during the sawing process, thereby ensuring the stability and accuracy of the sawing. The existence of the driven wheel shaft allows the driven wheel to rotate stably and transmit the force of the saw band tensioning device to the driven wheel.

[0012] The beneficial effects of the utility model are that the steel brush device cleans the debris wrapped around the saw blade, thereby extending the service life of the saw blade; the guide blade cleans the saw blade and the saw blade debris at the same time, thereby extending the service life of the saw blade, thereby saving the economic cost of replacing the saw blade; the guide blade is driven by the left guide arm and the right guide arm to reciprocate on the saw blade to comprehensively clean the saw blade, and the guide blade can also assist the saw blade in cutting the object to be sawed, thereby improving the cutting ability of the saw frame. The utility model can improve the stability and accuracy of sawing through the design of the anti-vibration wheel and the roller bearing, prevent the saw blade from bending or deviating from the cutting direction, and improve the cutting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a back view schematic diagram of the utility model.

[0014] Figure 2 It is a front view schematic diagram of the utility model.

[0015] Figure 3 It is a structural schematic diagram of the steel brush device of the utility model.

[0016] Figure 4 It is a side view schematic diagram of the left guide arm of the utility model.

[0017] Figure 5 yes Figure 4 A is an enlarged schematic diagram of the enlarged schematic symbol.

[0018] Figure 6 It is a side view schematic diagram of the right guide arm assembly slide rail of the utility model.

[0019] In the figure: 1. Active saw wheel, 2. Driven saw wheel, 3. Saw blade, 4. Quick drop lever, 5. Left guide arm, 6. Right guide arm, 7. Left guide head, 8. Right guide head, 9. Steel brush device, 901. Speed ​​reduction motor, 902. Steel brush mounting seat, 903. Steel brush gear box, 904. Universal joint, 905. Steel brush shaft, 906. Steel brush, 10. Guard, 11. Swing arm, 12. Steel brush guard plate, 13. Swing arm mounting seat, 14 . Anti-vibration wheel, 15. Roller bearing, 16. Guide blade, 17. Guide bracket, 18. Ring, 19. Drag chain bracket, 20. Drag chain, 21. Slide rail, 2101. Left slide rail, 2102. Right slide rail, 22. Slider, 23. Saw belt tensioning device, 2301. Tensioning cylinder, 2302. Tensioning slider, 24. Driven wheel shaft, 25. Proximity switch, 26. Detection rod, 27. Detection head, A. Enlarged schematic mark. DETAILED DESCRIPTION

[0020] 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.

[0021] Embodiment 1, as Figures 1 to 6 As shown, the utility model provides a saw frame, such as Figure 1 The figure shows a back view of the saw frame of the utility model, specifically, a perspective from the back of the saw frame. Figure 2 It can be seen that the saw blade 3 of the utility model is driven by the active saw wheel 1 and the driven saw wheel 2. Figure 2 Take the perspective of the saw frame from the front as an example, the left side is the driven saw wheel 2 and the right side is the active saw wheel 1, and the saw blade 3 goes around the driven saw wheel 2 and the active saw wheel 1, so that the whole forms an ellipse similar to the shape of a runway. Figure 1 and Figure 2 It can be seen that a quick-drop lever 4 is provided on the central axis of the saw blade. In this embodiment of the utility model, the quick-drop lever 4 is provided with a bend near the saw blade 4 in order not to affect the operation of the saw blade 4. The body of the quick-drop lever 4 is on the back of the saw frame, and a bend is provided near the saw blade 4. After the bend, the end portion of the quick-drop lever 4 is provided on the front of the saw frame, that is, Figure 2 The end of the quick-drop lever 4 away from the saw blade 3 is Figure 1 It can be seen that the portion at the top of the back of the saw frame divides the slide rail 21 into a left slide rail 2101 and a right slide rail 2102. In this embodiment of the utility model, the left slide rail 2101 is provided with two upper and lower rails, and the right slide rail 2101 is also provided with two upper and lower rails corresponding to each other, that is, the upper rail of the left slide rail 2101 and the upper rail of the right slide rail 2102 are on the same straight line, and similarly, the lower rail of the left slide rail 2101 and the lower rail of the right slide rail 2102 are also on the same straight line. Figure 6 It can be known that the right guide arm 6 and the slide rail 21 are connected by a slide block 22, and a slide block 22 is respectively provided on the upper and lower slide rails 21. It can be inferred that the left guide arm 5 and the slide rail 21 are also connected by a slide block 22 in the same way.

[0022] In addition, from Figure 1It can be seen that a saw band tensioning device 23 is installed on the back of the driven saw wheel 2, that is, the back of the saw frame. In this embodiment of the utility model, the saw band tensioning device 23 is composed of a tensioning oil cylinder 2301 and a tensioning slider 2302, wherein a hole is provided at the center of the tensioning slider 2302, and a driven wheel shaft 24 of the driven saw wheel 2 is provided in the hole. The force generated by the saw band tensioning device 23 is transmitted to the saw blade 3 through the driven wheel shaft 24, thereby changing the tightness of the saw blade 3, and facilitating the installation and replacement of the saw blade 3. In this embodiment of the utility model, the role of the saw band tensioning device 23 here is to adjust the tension of the saw band, ensure that the saw band remains in an appropriate tight state during the sawing process, and thus ensure the stability and accuracy of the sawing.

[0023] In addition, from Figure 1 It can be seen that the left guide arm 5 is provided with a left guide head 7 at one end close to the saw blade 3. Figure 1 In the figure, the saw blade 3 is at the bottom, so the left guide head 7 is below the left guide arm 5; similarly, the right guide arm 6 is provided with a right guide head 8 at one end close to the saw blade 3. Figure 1 In the figure, the saw blade 3 is at the bottom, so the right guide head 8 is below the right guide arm 6, because Figure 1 The perspective is from the back of the saw frame. Figure 1 The right guide arm 6 will be on the left and the left guide arm 5 will be on the right. Figure 2 The left guide arm 5 is located on the left side when viewed from the front of the saw frame. Figure 4 and Figure 5 It can be seen that the left guide head 7 is clamped under the left guide arm 5. In this embodiment of the utility model, the structures of the left guide arm 5 and the right guide arm 6 are the same. Similarly, the structures of the left guide head 7 and the right guide head 8 are also the same. The matching relationship between the left guide arm 5 and the left guide head 7 is the same as the matching relationship between the right guide arm 6 and the right guide head 8. Therefore, only the matching relationship between the left guide arm 5 and the left guide head 7 is shown in the drawings in the specification. Figure 1 Combination Figure 4 and Figure 5 It can be seen that the left guide arm 5 is mainly divided into two parts, one is the upper part that contacts the slider 22, and a drag chain bracket 19 is provided on the upper side of the left guide arm 5. In this embodiment of the utility model, a bend is provided on the top of the drag chain bracket 19, and the bend is located in the notch of the drag chain 20 and is close to the drag chain 20.

[0024] In this embodiment of the utility model, as Figure 1 As shown, the drag chain 20 is arranged at the top of the saw frame, and is in a U shape as a whole, and is symmetrically distributed with the quick-drop rod 4 as the central axis. The drag chain 20 is placed horizontally, and the U-shaped opening can also be understood as the notch of the drag chain 20, which is directed toward the quick-drop rod 4. Specifically, Figure 1It can be seen that the U-shaped opening of the drag chain 20 near the active saw wheel 1 is facing right, that is, in the direction away from the active saw wheel 1, while the U-shaped opening of the drag chain 20 near the driven saw wheel 2 is facing left, that is, in the direction away from the driven saw wheel 2. In addition, in the initial state, the lengths of the two straight sides of the drag chain 20 are not the same. The long straight side is close to the surface of the top of the saw frame, located below the bend of the drag chain bracket 19, and there is a gap between the bend of the drag chain bracket 19, and the end of the long straight side is flush with the side of the bend of the drag chain bracket 19. The short straight side of the drag chain 20 is located above the long straight side, and the bottom of the short straight side is close to the top surface of the bend of the drag chain bracket 19. Specifically, the top surface of the bend of the drag chain bracket 19 is close to the bottom surface of the short straight side of the drag chain 20. The drag chain bracket 19 is connected to the left guide arm 5 or the right guide arm 6, that is, the movement of the left guide arm 5 and the right guide arm 6 along the slide rail 21 will drive the movement of the drag chain bracket 19, and the movement of the drag chain bracket 19 will cause the drag chain 20 to move away from the initial state and move along. The so-called initial state refers to the state in which the end of the long straight side of the drag chain 20 is flush with the side of the bend of the drag chain bracket 19, that is, Figure 1 In the state shown, the left guide arm 5 and the right guide arm 6 do not move toward the quick-drop rod 4. When the left guide arm 5 and the right guide arm 6 move along the slide rail 21, that is, when the left guide arm 5 and the right guide arm 6 move toward the quick-drop rod 4, the drag chain bracket 19 drives the drag chain 20 to move. In this embodiment of the utility model, the movement of the left guide arm 5 and the right guide arm 6 is driven by an oil cylinder, which is fixed to the back of the saw frame in the horizontal direction. In the utility model, the drag chain 20 is set to protect the line from wear and tear, and can also protect the line from environmental influences, and can prevent the line from entanglement and knotting.

[0025] In addition, by Figure 1 As shown, on the back of the saw frame, above the slide rail 21, a detection rod 26 is provided near the end of the saw frame. In this embodiment of the utility model, a magnetic strip is installed on the detection rod 26. Corresponding to the detection rod 26, a detection head 27 is installed on the left guide arm 5 and the right guide arm 6. The specific installation position of the detection head 27 is that the side of the drag chain bracket 19 and the drag chain bracket 19 are on the same horizontal plane, that is, located on the top surface of the left guide arm 5 and the right guide arm 6. More specifically, the installation position of the detection head 27 is the side of the drag chain bracket 19 close to the quick drop rod 4. Its working principle is that the left guide arm 5 and the right guide arm 6 reciprocate along the slide rail 21, so that the detection head 27 reciprocates with it. The detection head 27 and the detection rod 26 cooperate. In this embodiment of the utility model, the detection head 27 records the movement trajectory of the left guide arm 5 and the right guide arm 6 through magnetic induction. That is, the reciprocating motion of the left guide arm 5 and the right guide arm 6 causes the position of the detection rod 26 sensed by the detection head 27 to change, which is then converted into the motion trajectory, motion speed and other data of the left guide arm 5 and the right guide arm 6 through data processing.

[0026] In addition, by Figure 1 Combination Figure 4 and Figure 5 It can be seen that the left guide arm 5 is mainly divided into two parts, one is the upper part that contacts the slider 22, and the lower part that fixes the left guide head 7, and the middle of these two parts is Figure 4 The lower half of the left guide arm 5 holds the left guide head 7 inside, and the left guide head 7 is provided with a guide blade 16 at one end close to the saw blade. Figure 5 As shown, in this embodiment of the utility model, there are three groups of guide blades 16, which are divided into upper, middle and lower groups. The guide blades 16 are distributed on both sides of the saw blade 3, which is equivalent to sandwiching the saw blade 3 between the guide blades 16. However, in this embodiment of the utility model, there is a gap between the guide blade 16 and the saw blade 3, and a guide bracket 17 is provided above the guide blade 16. The guide bracket 17 is provided at the front and back of the saw blade 3. A collar 18 is directly provided on the guide bracket 17, and it can be considered that the collar 18 is just above the saw blade 3. The collar 18 is close to the guide brackets 17 on both sides.

[0027] In this embodiment of the utility model, as Figure 1 , Figure 2 and Figure 3 As shown, the utility model is provided with a steel brush device 9 between the right guide arm 6 and the active saw wheel 1, wherein the steel brush device 9 is mainly composed of the following parts. A steel brush mounting seat 902 is obliquely mounted on the front of the saw frame, and a reduction motor 901 is placed on the steel brush mounting seat 902 and is also obliquely placed and at an angle to the horizontal direction. The main shaft of the reduction motor 901 is connected to a steel brush gear box 903 below the saw frame. In this embodiment of the utility model, the steel brush gear box 903 has two output ports, each of which is connected to a universal joint 904, and the two output ports are respectively located on the front and back of the saw frame. A steel brush shaft 905 is connected obliquely below the universal joint 904, and a steel brush 906 is connected to the end of the steel brush shaft 905 away from the universal joint 904. A swing arm 11 is provided between the steel brush 906 and the universal joint 904, and a guard 10 is provided obliquely above the steel brush gear box 903. A swing arm mounting seat 13 is connected obliquely below the guard 10 and in a direction parallel to the steel brush device 9. The swing arm mounting seat connects the swing arm 11 and the guard 10. A steel brush guard plate 12 is provided between the steel brush 906 and the swing arm 11. The steel brush guard plate 12 protects the steel brush 906 on the back of the saw frame, and the steel brush 906 on the front of the saw frame is also protected by a plate, which is also located between the steel brush 906 and the swing arm 11.

[0028] In this embodiment of the utility model, as Figure 1 and Figure 2As shown, the left guide arm 5 is provided with a shockproof wheel 14 and a roller bearing 15 at one end away from the quick-drop rod 4. Similarly, the right guide arm 6 is also provided with a shockproof wheel 14 and a roller bearing 15 at one end away from the quick-drop rod 4. In this embodiment of the utility model, the shockproof wheel 14 is located on the front side of the saw blade 3 and the roller bearing 15 is located on the back side of the saw blade 3. The shockproof wheel 14 and the roller bearing 15 are opposite to each other, that is, the back side of the shockproof wheel 14 is the roller bearing 15. In this embodiment of the utility model, the roller bearing 15 is cylindrical as a whole. A quick-drop lever 4 is provided on the central axis of the saw blade 3, the lowermost end of the quick-drop lever 4 is located below the saw blade 3, and a proximity switch 25 is provided at the uppermost end of the quick-drop lever 4. Since the lowermost end of the quick-drop lever 4 is located below the saw blade 3, when the quick-drop lever 4 contacts the material to be cut, it will be lifted by the material to be cut, and the lifted displacement is sensed by the proximity switch 25 at the uppermost end of the quick-drop lever 4. Only after the sensing, the saw blade 3 will move downward to perform the cutting work, thereby preventing the material to be cut from being fed too fast, causing the saw blade 3 to drop too fast and then directly impact the material to be cut, causing damage to the saw blade 3. In this embodiment of the utility model, a gap is left between the proximity switch 25 and the uppermost end of the quick-drop lever 4, and the gap will be recorded in the initial state. When the gap changes, it means that the quick-drop lever 4 contacts the material to be cut, and the saw blade 3 will cut downward synchronously at this time.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model is described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions recorded in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the present utility model.

Claims

1. A saw frame, wherein an active saw wheel is mounted on one end of the saw frame and a driven saw wheel is mounted on the other end, wherein: Saw blades are installed on the active saw wheel and the driven saw wheel, a quick-drop rod is provided on the central axis of the saw blade, the lowermost end of the quick-drop rod is located below the saw blade, the uppermost end of the quick-drop rod is provided with a proximity switch, a left guide arm is provided between the quick-drop rod and the driven saw wheel, a right guide arm is provided between the quick-drop rod and the active saw wheel, a left guide head is provided at the lower end of the left guide arm to be clamped on the saw blade, and a right guide head is provided at the lower end of the right guide arm to be clamped on the saw blade.

2. A saw frame according to claim 1, characterized in that: A steel brush device is provided between the right guide arm and the active saw wheel, and the steel brush device is obliquely fixed on the saw frame. The steel brush device includes a reduction motor, and the reduction motor is fixed on a steel brush mounting seat, and the steel brush mounting seat is fixed on the front of the saw frame. The reduction motor is connected to a steel brush gear box, and one end of the steel brush gear box is connected to the reduction motor and the other end is provided with a universal joint, and a protective cover is provided obliquely above the steel brush gear box.

3. A saw frame according to claim 2, characterized in that: The universal joint is connected to the steel brush shaft, a steel brush is provided at one end of the steel brush shaft away from the universal joint, a swing arm is provided on the steel brush shaft, the swing arm is located between the universal joint and the steel brush, a steel brush guard is provided at one end of the swing arm close to the steel brush, a swing arm mounting seat is provided obliquely above the swing arm, and the swing arm mounting seat is connected to the guard cover.

4. A saw frame according to claim 1, characterized in that: A shockproof wheel is provided on the side of the left guide head close to the driven saw wheel, and a shockproof wheel is also provided on the side of the right guide head close to the active saw wheel. The shockproof wheel is located on the front side of the saw blade, and a roller bearing is provided on the reverse side of the saw blade corresponding to the shockproof wheel. The roller bearing is cylindrical as a whole.

5. A saw frame according to claim 1 or 4, characterized in that: A guide blade is provided on the side of the left guide head away from the driven saw wheel, and a guide blade is also provided on the side of the right guide head away from the active saw wheel. The guide blade is close to the saw blade, a guide bracket is provided above the guide blade, and a ring is provided inside the guide bracket.

6. A saw frame according to claim 1, characterized in that: A drag chain is provided at the top of the saw frame, a drag chain bracket is provided at the end of the left guide arm away from the saw blade, a drag chain bracket is also provided at the end of the right guide arm away from the saw blade, and a bend is provided at the upper end of the drag chain bracket, which is stuck in the notch of the drag chain.

7. A saw frame according to claim 1, characterized in that: A slide rail is provided on the back of the saw frame. The slide rail is arranged on both sides of the quick-drop rod and is divided into a left slide rail and a right slide rail. A slider adapted to the left slide rail is provided on the left slide rail. One side of the slider is connected to the left slide rail and the other side is connected to the left guide arm.

8. A saw frame according to claim 1, characterized in that: A saw band tensioning device is provided on the back of the saw frame corresponding to the driven saw wheel, a driven wheel shaft is provided at the center of the driven saw wheel, and the saw band tensioning device includes a tensioning cylinder connected to a tensioning slider, a hole is provided in the middle of the tensioning slider and connected to the driven wheel shaft.

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