Direct-current band saw

Abstract

The invention discloses a direct-current band saw, which belongs to the technical field of electric processing equipment and comprises a bearing base fixedly mounted below a protective storage box body and a combined square frame table and used for supporting the protective storage box body and the combined square frame table to work stably; the combined square frame table is positioned at the right end of the bearing base and is used for stabilizing the driving motor; a positioning connector is fixedly installed at the output end of the driving motor, is of a regular hexagonal cylinder structure and is used for driving installation and butt joint. The strip-shaped band saw has the beneficial effects that after the strip-shaped band saw is mounted on the outer side of the band saw driving wheel in a sleeving manner, the position, on the outer side of the band saw driving wheel, of the strip-shaped band saw can be accurately positioned according to clamping butt joint of the positioning hole in the strip-shaped band saw and the positioning shaft body, the dislocation and loosening phenomena during subsequent machining operation are avoided, and the machining efficiency is improved. Meanwhile, positioning of the strip-shaped band saw can be relieved according to shifting of the manual operation sleeve, and rapid replacement operation is facilitated.

Description

Technical Field

[0001] This application relates to the field of electric machining equipment technology, and in particular to a DC band saw. Background Technology

[0002] Electric machining equipment refers to equipment that drives a mechanism to operate automatically, thereby enabling rapid processing of products, including cutting processing. For example, a band saw that operates in a straight line can quickly cut products. Existing DC band saws require different tools to disassemble and replace internal band saw components, resulting in low overall maintenance efficiency. They cannot be maintained without the necessary tools. Furthermore, if the drive motor fails, the internal mechanism cannot operate, requiring motor repair. However, if the drive motor is severely damaged, the entire device cannot function, affecting processing efficiency. For example, in the case of a permanent magnet direct-drive band saw with application number CN201922038977.3, when it is necessary to replace the internal saw blade or replace the permanent magnet motor due to damage during use, the operation requires the use of matching tools. Without the tools, a single person cannot perform the appropriate replacement operation. Summary of the Invention

[0003] One of the objectives of this application is to provide a DC band saw that, when it is necessary to disassemble and replace the band saw parts inside the device, the overall disassembly operation requires the use of different operating tools, resulting in low overall maintenance efficiency and making it impossible to perform maintenance work without tools.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows: a DC band saw, including a load-bearing base, which is fixedly installed under the protective storage box and the combined square frame platform to support the protective storage box and the combined square frame platform for stable operation.

[0005] The modular frame platform is located at the right end of the load-bearing base and is used to stabilize the drive motor.

[0006] The output end of the drive motor is fixedly equipped with a positioning joint, which is a regular hexagonal prism structure and is used for drive operation for installation and docking.

[0007] The protective storage box has a product processing room in the middle, and an expansion processing platform is fixedly installed on the outer surface of the protective storage box for placing and processing products.

[0008] A connecting drive shaft is installed through the bottom frame of the protective storage box, and a docking slot is opened at the center of the outer end of the connecting drive shaft. The docking slot is connected to the positioning connector for disassembling and assembling the drive motor.

[0009] The inner end of the connecting drive shaft is fixedly installed with a band saw drive wheel, and the band saw drive wheel is located inside the protective storage box. A strip band saw is sleeved and mounted around the outer side of the band saw drive wheel, and the strip band saw has a positioning hole for securing the strip band saw in a stable working manner.

[0010] An adjusting lifting block is installed inside the top of the protective storage box, and an adjusting screw shaft is installed through the adjusting lifting block. The adjusting screw shaft passes through the top frame of the protective storage box, and an operating handle is fixedly installed at the top of the adjusting screw shaft. A connecting shaft is fixedly installed at the center of the outer surface of the adjusting lifting block, and a band saw drive wheel is fixedly installed at the end of the connecting shaft for adjusting the distance between the band saw drive wheels.

[0011] The outer frame of the protective storage box is equipped with a sealing side plate, and the sealing side plate has heat dissipation grooves and pull slots for sealing the outside of the protective storage box.

[0012] Preferably, the combined frame platform includes a positioning motor slot, a limiting slot, and a barrier plate. The top surface of the frame of the combined frame platform is provided with a positioning motor slot, and the top frame of the combined frame platform is provided with a limiting slot. The barrier plate is installed inside the positioning motor slot, and the bottom end of the barrier plate is connected to the limiting slot.

[0013] Preferably, the bottom of the drive motor is slidably connected to the positioning motor slot, the bottom outer surface of the drive motor is fitted to the barrier plate, the barrier plate is snapped into the limiting slot, the positioning connector on the drive motor is slidably snapped into the connecting drive shaft, and the connecting drive shaft is connected to the load-bearing base via a bearing connection.

[0014] Preferably, the expansion processing platform and the protective storage box are connected by welding, and the top surface of the expansion processing platform is flush with the bottom surface of the product processing area. The protective storage box has a slot on its frame, and the protective storage box is connected to the band saw by sliding through the slot.

[0015] Preferably, the band saw drive wheel includes an anti-drop collar, a storage groove, a storage hole, a support spring body, a positioning shaft, a connecting wire rope, and a manual operation sleeve. The anti-drop collar is fixedly installed on the outer surface of the band saw drive wheel, and the band saw drive wheel has a storage groove and a storage hole inside. The support spring body and the positioning shaft are installed inside the storage hole, and the positioning shaft passes through the outer surface of the band saw drive wheel and penetrates the positioning hole. The connecting wire rope is installed at the center of the bottom end of the positioning shaft, and the manual operation sleeve is installed at the end of the connecting wire rope, and the manual operation sleeve is located inside the storage groove.

[0016] Preferably, the manual operation sleeve is connected and fixed to the positioning shaft by a connecting steel wire rope, and the manual operation sleeve is connected to the band saw drive wheel by a sliding connection through the storage groove, and the diameter of the band saw drive wheel is smaller than the diameter of the anti-drop collar.

[0017] Preferably, the positioning shaft body forms a telescopic structure with the band saw drive wheel through a storage hole and a supporting spring body, and the end of the positioning shaft body is rounded.

[0018] Preferably, the positioning holes are connected to the positioning shaft by sliding engagement, and the positioning holes are evenly distributed on the band saw, and the distribution of the positioning holes on the band saw corresponds to the equiangular distribution of the positioning shaft on the band saw drive wheel.

[0019] Preferably, the adjustment lifting block is connected to the protective storage box by a sliding connection, the adjustment lifting block is connected to the connecting shaft by a bearing connection, the adjustment lifting block is connected to the adjusting lead screw shaft by a threaded lead screw connection, and the adjusting lead screw shaft is connected to the protective storage box by a rotary connection.

[0020] Preferably, a limiting mechanism is provided on the outer side of the frame of the sealing side plate, and the connection between the sealing side plate and the protective storage box is a sliding engagement, and the groove provided on the sealing side plate is the same as the structure of the expansion processing platform.

[0021] Compared with the prior art, the beneficial effects of this application are as follows: Based on the structure set on the assembly frame platform, the drive motor can be easily assembled through the positioning motor slot. Subsequently, the drive motor slides into and engages with the docking slot on the connecting drive shaft through the positioning connector. The docking of the barrier plate and the limiting slot can stabilize the position of the drive motor, preventing loosening during subsequent operation. Furthermore, if the drive motor is damaged in the future, it can be quickly disassembled and replaced to prevent the entire device from becoming inoperable.

[0022] After the band saw is fitted onto the outside of the band saw drive wheel, the positioning hole on the band saw engages with the positioning shaft, which allows for precise positioning of the band saw on the outside of the band saw drive wheel. This prevents misalignment and loosening during subsequent processing. At the same time, the positioning of the band saw can be released by moving the manual operating sleeve, facilitating quick and easy replacement.

[0023] Rotating the adjustment screw shaft using the operating handle allows the adjustment lifting block to be adjusted up and down, which in turn adjusts the height of the top band saw drive wheel, facilitating appropriate matching and adjustment based on the dimensions of the band saw.

[0024] The sealing side plate on the outside of the protective storage box can be combined and sealed with the protective storage box by the limiting mechanism on the outer edge of the sealing side plate. The subsequent disassembly can be done manually. When replacing the strip saw inside the protective storage box, it can be done manually without the use of matching tools, which is convenient and quick. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention.

[0026] Figure 2 This is a schematic diagram of the internal three-dimensional structure of the protective storage box of the present invention.

[0027] Figure 3 This is a schematic diagram of the overall flip-over three-dimensional structure of the present invention.

[0028] Figure 4 This is a schematic diagram of the three-dimensional structure of the drive motor of the present invention.

[0029] Figure 5 This is a cross-sectional three-dimensional structural diagram of the combined square frame platform of the present invention.

[0030] Figure 6 This is a three-dimensional structural diagram of the sealing side plate of the present invention.

[0031] Figure 7 This is a front view structural diagram of the cross-section of the protective storage box of the present invention.

[0032] Figure 8 This is a three-dimensional structural diagram of the band saw drive wheel of the present invention.

[0033] Figure 9 This is a three-dimensional cross-sectional view of the band saw drive wheel of the present invention.

[0034] Figure 10 For the present invention Figure 9 Enlarged structural diagram at point A in the middle.

[0035] In the diagram: 1. Load-bearing base; 2. Combined square frame platform; 21. Positioning motor slot; 22. Limiting slot; 23. Barrier plate; 3. Drive motor; 4. Positioning connector; 5. Protective storage box; 6. Product processing room; 7. Expanding processing platform; 8. Connecting drive shaft; 9. Docking slot; 10. Band saw drive wheel; 101. Anti-drop collar; 102. Storage slot; 103. Storage hole; 104. Support spring body; 105. Positioning shaft; 106. Connecting wire rope; 107. Manual operation sleeve; 11. Band saw; 12. Positioning hole; 13. Adjusting lifting block; 14. Adjusting lead screw shaft; 15. Operating handle; 16. Connecting rotating shaft; 17. Sealing side plate; 18. Heat dissipation slot; 19. Pulling slot. Detailed Implementation

[0036] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0037] In the description of this application, it should be noted that the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of this application.

[0038] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0039] One preferred embodiment of this application, such as Figures 1 to 10 As shown, a DC band saw includes a load-bearing base 1, which is fixedly installed below the protective storage box 5 and the combined square frame platform 2, for supporting the protective storage box 5 and the combined square frame platform 2 to ensure stable operation. The combined square platform 2 is located at the right end of the load-bearing base 1 and is used to stabilize the drive motor 3. The output end of the drive motor 3 is fixedly equipped with a positioning connector 4. The positioning connector 4 is a regular hexagonal prism structure and is used for drive work of installation and docking. The protective storage box 5 has a product processing room 6 in the middle, and an expansion processing platform 7 is fixedly installed on the outer surface of the protective storage box 5 for placing and processing products. A connecting drive shaft 8 is installed through the bottom edge of the protective storage box 5, and a docking slot 9 is opened at the center of the outer end of the connecting drive shaft 8. The docking slot 9 is connected to the positioning connector 4 for disassembly and assembly of the drive motor 3. A band saw drive wheel 10 is fixedly installed on the inner end of the drive shaft 8, and the band saw drive wheel 10 is located inside the protective storage box 5. A strip band saw 11 is sleeved and mounted around the outer side of the band saw drive wheel 10, and a positioning hole 12 is provided on the strip band saw 11 for securely installing the strip band saw 11. An adjusting lifting block 13 is installed inside the top of the protective storage box 5, and an adjusting screw shaft 14 is installed through the adjusting lifting block 13. The adjusting screw shaft 14 passes through the top frame of the protective storage box 5, and an operating handle 15 is fixedly installed at the top of the adjusting screw shaft 14. A connecting shaft 16 is fixedly installed at the center of the outer surface of the adjusting lifting block 13, and a band saw drive wheel 10 is fixedly installed at the end of the connecting shaft 16 for adjusting the distance between the band saw drive wheels 10. The outer frame of the protective storage box 5 is equipped with a sealing side plate 17, and the sealing side plate 17 is provided with a heat dissipation groove 18 and a pull groove 19 for sealing the outside of the protective storage box 5. The combined frame platform 2 includes a positioning motor slot 21, a limiting slot 22, and a barrier plate 23. The positioning motor slot 21 is formed on the top surface of the frame of the combined frame platform 2, and the limiting slot 22 is provided on the top frame of the combined frame platform 2. The barrier plate 23 is installed inside the positioning motor slot 21, and the bottom end of the barrier plate 23 is connected to the limiting slot 22. The bottom of the drive motor 3 is slidably connected to the positioning motor slot 21, and the outer surface of the bottom end of the drive motor 3 is fitted to the barrier plate 23. The barrier plate 23 is connected to the limiting slot 22 in a fitted manner. The drive motor 3 is connected by a snap-fit ​​mechanism. The positioning connector 4 on the drive motor 3 is connected to the docking slot 9 on the connecting drive shaft 8 by a sliding snap-fit ​​mechanism. The connecting drive shaft 8 is connected to the load-bearing base 1 by a bearing connection mechanism. The drive motor 3 can be precisely installed and aligned by the positioning motor slot 21 set on the combined frame platform 2. This facilitates the alignment and snap-fit ​​of the positioning connector 4 and the docking slot 9 on the connecting drive shaft 8. At the same time, the snap-fit ​​between the barrier plate 23 and the limiting slot 22 can fix the position of the drive motor 3 after installation, preventing loosening and misalignment during subsequent operation. It also facilitates subsequent disassembly and maintenance. The expansion processing platform 7 and the protective storage box 5 are connected by welding. The top surface of the expansion processing platform 7 is flush with the bottom surface of the product processing room 6. The protective storage box 5 has a slot on its frame. The protective storage box 5 is connected to the strip saw 11 by sliding through the slot. The expansion processing platform 7 on the protective storage box 5 can increase the placement space for subsequent processing operations, improve the overall processing efficiency, and avoid products that are too large to be placed. The band saw drive wheel 10 includes an anti-drop collar 101, a storage groove 102, a storage hole 103, a support spring body 104, a positioning shaft 105, a connecting wire rope 106, and a manual operation sleeve 107. The anti-drop collar 101 is fixedly installed on the outer surface of the band saw drive wheel 10, and the band saw drive wheel 10 has a storage groove 102 and a storage hole 103 inside. The support spring body 104 and the positioning shaft 105 are installed inside the storage hole 103, and the positioning shaft 105 passes through the outer surface of the band saw drive wheel 10 and is interconnected with the positioning hole 12. The connecting wire rope 106 is installed at the center of the bottom end of the positioning shaft 105, and the manual operation sleeve 107 is installed at the end of the connecting wire rope 106, and the manual operation sleeve 107 is located inside the storage groove 102. The manual operation sleeve 107 is connected and fixed to the positioning shaft 105 via the connecting wire rope 106. The manual operation sleeve 107 is slidably connected to the band saw drive wheel 10 via the storage groove 102. The diameter of the band saw drive wheel 10 is smaller than the diameter of the anti-drop collar 101. Subsequently, by manually pulling the manual operation sleeve 107, the manual operation sleeve 107 drives the positioning shaft 105 to retract and rotate via the connecting wire rope 106, which facilitates disassembly and assembly. The operation can be done manually without the need for tools, making it simple and quick. The positioning shaft 105 forms a telescopic structure with the band saw drive wheel 10 through the storage hole 103 and the support spring body 104. The end of the positioning shaft 105 is rounded. The positioning shaft 105 can be extended by the elastic force of the support spring body 104. At the same time, the end structure of the positioning shaft 105 is conducive to subsequent docking and assembly work, while maintaining the assembly stability during operation. The positioning holes 12 and the positioning shaft 105 are connected by a sliding engagement. The positioning holes 12 are evenly distributed on the band saw 11, and the distribution of the positioning holes 12 on the band saw 11 corresponds to the equiangular distribution of the positioning shaft 105 on the band saw drive wheel 10. The band saw 11 can be mounted around the outside of the band saw drive wheel 10. Based on the docking of the positioning holes 12 on the band saw 11 and the positioning shaft 105, the stability of the band saw 11 during subsequent operation is maintained, and misalignment during processing is avoided. The adjustment lifting block 13 is connected to the protective storage box 5 by a sliding connection, and the adjustment lifting block 13 is connected to the connecting shaft 16 by a bearing connection. The adjustment lifting block 13 is connected to the adjusting screw shaft 14 by a threaded screw connection, and the adjusting screw shaft 14 is connected to the protective storage box 5 by a rotary connection. According to the rotation of the adjusting screw shaft 14, the adjustment lifting block 13 can be driven to perform lifting and adjusting work. The distance between the band saw drive wheels 10 can be flexibly adjusted according to the size of the band saw 11. A limiting mechanism is provided on the outer side of the frame of the sealing side plate 17, and the connection between the sealing side plate 17 and the protective storage box 5 is a sliding engagement. The groove provided on the sealing side plate 17 has the same structure as the expansion processing platform 7. The sealing side plate 17 can be slid into the protective storage box 5 for assembly and sealing. Since the groove provided on the sealing side plate 17 has the same structure as the expansion processing platform 7, it will not affect the processing operation of the product, and the subsequent disassembly operation is convenient. The working principle of this embodiment: According to Figure 3-5 First, the staff can slide the drive motor 3 into the positioning motor slot 21 on the combined frame platform 2 and push the drive motor 3 so that the drive motor 3 drives the positioning connector 4 to slide into the docking slot 9 on the connecting drive shaft 8 for easy assembly. Then, the barrier plate 23 is slid into the limiting slot 22 for engagement so that the barrier plate 23 is in contact with the outer surface of the base of the drive motor 3, which can stabilize the installation of the drive motor 3 and prevent loosening later. according to Figure 1-2 and Figure 6-10 Next, the sealing side plate 17 can be manually pulled upward by pulling the slot 19, causing the sealing side plate 17 to slide and separate from the protective storage box 5. Then, the band saw 11 can be sleeved around and installed on the outside of the band saw drive wheel 10. At the same time, the manual operation sleeve 107 is manually pulled, and the manual operation sleeve 107 slides inside the storage groove 102. The manual operation sleeve 107 pulls the positioning shaft 105 through the connecting wire rope 106, and the positioning shaft 105 retracts completely into the storage hole 103. The positioning shaft 105 pushes the support spring 104 to retract, making it easy for the strip saw 11 to be fitted onto the outside of the band saw drive wheel 10. At the same time, the positioning hole 12 on the strip saw 11 is aligned with the storage hole 103. The manual operation sleeve 107 is released, so that the positioning shaft 105 is pushed back by the elastic force of the support spring 104. The positioning shaft 105 passes through the positioning hole 12 and engages, which can accurately position the strip saw 11 on the outside of the band saw drive wheel 10. according to Figure 1-3 and Figure 7When the assembled band saw 11 is slightly loose, the operating handle 15 can be rotated manually. The operating handle 15 drives the adjusting screw shaft 14 to rotate within the protective storage box 5. The adjusting screw shaft 14 drives the threaded adjusting lifting block 13 to adjust the height. The adjusting lifting block 13 drives the band saw drive wheel 10 to move through the connecting shaft 16, which makes it easier to straighten the band saw 11 and avoid shaking during subsequent work. according to Figure 1-4 Next, the sealing side plate 17 is slid into and sealed with the protective storage box 5. Then, the drive motor 3 can be connected to an external power source via a power cord and started. The drive motor 3 drives the band saw drive wheel 10 to rotate through the positioning joint 4 and the connecting drive shaft 8. At the same time, the band saw drive wheel 10 drives the strip band saw 11 to work. During the operation of the strip band saw 11, the positioning hole 12 on the strip band saw 11 repeatedly and intermittently engages with the positioning shaft 105, which can also drive the top band saw drive wheel 10 to rotate. Based on the product processing room 6 and the expansion processing platform 7 set on the protective storage box 5, and the strip band saw 11 running linearly inside the product processing room 6, processing operations can be performed. The drive motor 3 is a known and existing technology on the market and will not be described in detail here.

[0040] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A DC band saw, characterized in that, include: The load-bearing base (1) is fixedly installed under the protective storage box (5) and the combined square frame platform (2) to support the protective storage box (5) and the combined square frame platform (2) to work stably. The combined square frame platform (2) is located at the right end of the load-bearing base (1) and is used to stabilize the drive motor (3). The output end of the drive motor (3) is fixedly installed with a positioning connector (4). The positioning connector (4) is a regular hexagonal prism structure and is used for drive work of installation and docking. The protective storage box (5) is provided with a product processing room (6) in the middle, and an expansion processing platform (7) is fixedly installed on the outer surface of the protective storage box (5) for placing and processing products. The bottom frame of the protective storage box (5) is equipped with a connecting drive shaft (8), and the center of the outer end of the connecting drive shaft (8) is provided with a docking slot (9), and the docking slot (9) is connected to the positioning connector (4) for disassembling and assembling the drive motor (3). The inner end of the connecting drive shaft (8) is fixedly installed with a band saw drive wheel (10), and the band saw drive wheel (10) is located inside the protective storage box (5). A strip band saw (11) is sleeved and mounted around the outer side of the band saw drive wheel (10), and a positioning hole (12) is provided on the strip band saw (11) for securely installing the strip band saw (11). An adjusting lifting block (13) is installed inside the top of the protective storage box (5), and an adjusting screw shaft (14) is installed through the adjusting lifting block (13). The adjusting screw shaft (14) passes through the top frame of the protective storage box (5), and an operating handle (15) is fixedly installed at the top of the adjusting screw shaft (14). A connecting shaft (16) is fixedly installed at the center of the outer surface of the adjusting lifting block (13), and a band saw drive wheel (10) is fixedly installed at the end of the connecting shaft (16) for adjusting the distance between the band saw drive wheels (10). The outer frame of the protective storage box (5) is equipped with a sealing side plate (17), and the sealing side plate (17) is provided with a heat dissipation groove (18) and a pull groove (19) for sealing the outside of the protective storage box (5). The DC band saw as described in claim 1 is characterized in that: the combined frame platform (2) includes a positioning motor slot (21), a limiting slot (22) and a barrier plate (23), the top surface of the frame of the combined frame platform (2) is provided with a positioning motor slot (21), and the top frame of the combined frame platform (2) is provided with a limiting slot (22), the barrier plate (23) is installed inside the positioning motor slot (21), and the bottom end of the barrier plate (23) is connected to the limiting slot (22).

2. A DC band saw as described in claim 2, characterized in that: The bottom of the drive motor (3) is connected to the positioning motor slot (21) in a sliding connection, and the bottom outer surface of the drive motor (3) is connected to the barrier plate (23) in a fitted connection, and the barrier plate (23) is connected to the limiting slot (22) in a snap-fit ​​connection. The positioning connector (4) on the drive motor (3) is connected to the docking slot (9) on the connecting drive shaft (8) in a sliding snap-fit ​​connection, and the connecting drive shaft (8) is connected to the load-bearing base (1) in a bearing connection.

3. A DC band saw as described in claim 1, characterized in that: The expansion processing platform (7) is connected to the protective storage box (5) by welding. The top surface of the expansion processing platform (7) is flush with the bottom surface of the product processing room (6). The protective storage box (5) has a slot on its frame and is connected to the strip saw (11) by sliding through the slot.

4. A DC band saw as described in claim 1, characterized in that: The band saw drive wheel (10) includes an anti-drop collar (101), a storage groove (102), a storage hole (103), a support spring body (104), a positioning shaft body (105), a connecting wire rope (106), and a manual operation sleeve (107). The anti-drop collar (101) is fixedly installed on the outer surface of the band saw drive wheel (10), and the inside of the band saw drive wheel (10) is provided with a storage groove (102) and a storage hole (103). The hole (103) is equipped with a support spring body (104) and a positioning shaft body (105). The positioning shaft body (105) passes through the outer surface of the band saw drive wheel (10) and penetrates the positioning hole (12). A connecting steel wire rope (106) is installed at the bottom center of the positioning shaft body (105). A manual operation sleeve (107) is installed at the end of the connecting steel wire rope (106). The manual operation sleeve (107) is located inside the storage groove (102).

5. A DC band saw as described in claim 5, characterized in that: The manual operation sleeve (107) is connected and fixed to the positioning shaft (105) by the connecting wire rope (106), and the manual operation sleeve (107) is connected to the band saw drive wheel (10) by the storage groove (102) in a sliding connection manner, and the diameter of the band saw drive wheel (10) is smaller than the diameter of the anti-drop collar (101).

6. A DC band saw as described in claim 5, characterized in that: The positioning shaft (105) forms a telescopic structure with the band saw drive wheel (10) through the receiving hole (103) and the supporting spring body (104), and the end of the positioning shaft (105) is rounded.

7. A DC band saw as described in claim 5, characterized in that: The positioning holes (12) are connected to the positioning shaft (105) by sliding engagement, and the positioning holes (12) are evenly distributed on the band saw (11). The distribution of the positioning holes (12) on the band saw (11) corresponds to the equal angular distribution of the positioning shaft (105) on the band saw drive wheel (10).

8. A DC band saw as described in claim 1, characterized in that: The adjustment lifting block (13) is connected to the protective storage box (5) by a sliding connection, and the adjustment lifting block (13) is connected to the connecting shaft (16) by a bearing connection. The adjustment lifting block (13) is connected to the adjusting screw shaft (14) by a threaded screw connection, and the adjusting screw shaft (14) is connected to the protective storage box (5) by a rotary connection.

9. A DC band saw as described in claim 1, characterized in that: The sealing side plate (17) has a limiting mechanism on the outer side of the frame, and the sealing side plate (17) and the protective storage box (5) are connected by sliding and engaging. The slot on the sealing side plate (17) has the same structure as the expansion processing platform (7).

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