Saw wheel shell locking structure of band saw and band saw

Abstract

The saw wheel shell locking structure comprises a saw wheel shell used for containing a saw wheel, the saw wheel shell comprises a base shell and a cover cap, one side of the base shell is hinged to one side of the cover cap, the base shell is covered with the cover cap, and the cover cap and the base shell are combined to form a containing space used for containing the saw wheel. A locking mechanism is arranged between the other side of the base shell and the other side of the cover cap, the locking mechanism comprises a locking piece which is arranged on the base shell and can rotate, the locking piece rotates to the position above the cover cap to lock the base shell and the cover cap, and when the band saw blade needs to be replaced, the locking piece is rotated to be moved away from the position above the cover cap, so that the band saw blade is replaced. The locking piece does not stop opening of the cover cap any more, the cover cap is turned upwards to open the containing space, the band saw blade wound on the saw wheel is detached and replaced, the locking and unlocking mode does not need additional tools, and operation is simpler.

Description

Technical Field

[0001] The utility model relates to a band saw, in particular to a locking structure of a saw wheel housing of a band saw and a band saw. Background Art

[0002] A band saw is a sawing machine that uses an endless annular saw blade to surround two saw wheels and makes continuous rotary motion in the same direction for sawing. The band saw machine has high efficiency and a small saw kerf, and is the most widely used main sawing machine in Chinese lumber processing equipment.

[0003] For example, the portable band saw disclosed in Chinese invention patent CN115592201A includes: a first saw wheel, a second saw wheel, a band saw blade, a motor, a controller and a housing. The band saw blade is hung on each of the first saw wheel and the second saw wheel; the motor is used to drive the first saw wheel, the controller is used to control the motor, the housing includes a first housing, a second housing and a bridging housing. The first housing houses the first saw wheel, the second housing houses the second saw wheel, the bridging housing is arranged between the first housing and the second housing and houses the motor, at least a part of the band saw blade is arranged at the opening of the housing, and the opening of the housing is defined at a position lower than the bridging housing. The first housing is formed by connecting a front base and a front cover, and the upper right part of the front base is hinged to the upper right part of the front cover. The second housing is formed by connecting a rear base and a rear cover, and the upper right part of the rear base is hinged to the upper right part of the rear cover.

[0004] The existing problem of the band saw is that since the saw wheel is installed in the housing and the band saw blade is wound around the saw wheel, the housing includes a base shell and a cover that are hinged on one side, and the other side of the base shell and the cover is locked and fixed by screwing in screws. When it is necessary to replace the band saw blade wound around the saw wheel, it is necessary to use an additional tool (such as a screwdriver) to unscrew the screws, open the base shell and the cover, and then the band saw blade wound around the saw wheel can be removed, resulting in inconvenient replacement. Summary of the Utility Model

[0005] Based on the problem that when the other side of the base shell and the cover is fixed by screwing in screws, it is necessary to use an additional tool (such as a screwdriver) to unscrew the screws, open the base shell and the cover, and then the band saw blade wound around the saw wheel can be removed, resulting in inconvenient replacement, the utility model provides a locking structure of a saw wheel housing of a band saw and a band saw.

[0006] The technical solution adopted by the present utility model to solve the above technical problems is as follows: a locking structure for the saw wheel housing of a band saw, including a saw wheel housing for accommodating a saw wheel. The saw wheel housing includes a base shell and a cover that are hinged on one side. The cover is covered on the base shell, and the cover and the base shell are combined to form an accommodating space for accommodating the saw wheel. A locking mechanism is provided between the other side of the base shell and the other side of the cover. The locking mechanism includes a locking member that is arranged on the base shell and can rotate. When the locking member rotates above the cover, the base shell and the cover are locked.

[0007] A further preferred technical solution of the present utility model is as follows: The cover is provided with a abutting portion for the locking member to abut against when locking, and a limiting portion for limiting the locking member in the locked state. A limiting space is formed between the limiting portion and the abutting portion. When the locking member rotates and locks, the elastic deformation after extrusion between the locking member and the limiting portion enables the locking member to pass above the limiting portion and be caught in the limiting space for limiting.

[0008] A further preferred technical solution of the present utility model is as follows: The locking member includes a rotating column rotatably connected to the base shell, and a laterally extending portion extending laterally from the rotating column. A clamping portion extending downward is provided at the bottom of the laterally extending portion. When the laterally extending portion rotates above the cover for locking, the clamping portion passes above the limiting portion and is caught in the limiting space. The laterally extending portion abuts against the abutting portion, and the clamping portion abuts against a limiting edge on one side of the limiting portion.

[0009] A further preferred technical solution of the present utility model is as follows: The limiting portion is provided with a guiding bevel for guiding the rotating clamping portion into the limiting space. When the cover is covered on the base shell, the lower edge of the clamping portion is lower than the highest point of the limiting portion.

[0010] A further preferred technical solution of the present utility model is as follows: A fixed shaft is provided on the base shell. The rotating column is sleeved on the fixed shaft and can rotate around the fixed shaft. A limiting screw is connected to the fixed shaft to limit the upward detachment of the rotating column.

[0011] A further preferred technical solution of the present utility model is as follows: The cover is provided with an avoidance notch for the locking member to pass through when covering.

[0012] A further preferred technical solution of the present utility model is as follows: The limiting edge is parallel to the clamping portion.

[0013] A further preferred technical solution of the present utility model is as follows: The cover is provided with a low position on the side of the guiding bevel away from the limiting space for the laterally extending portion and the clamping portion to turn into the upper part of the cover.

[0014] A further preferred technical solution of the present utility model is as follows: The cover is provided with two convex blocks. The avoidance notch is located between the two convex blocks. An operating space for the locking member to rotate inside is formed between the two convex blocks when the cover and the base shell are covered.

[0015] Another theme: a band saw, including a locking structure for the saw wheel housing of the band saw. There are two saw wheel housings, which are arranged left and right. A saw wheel is installed in each saw wheel housing, and a band saw blade for cutting is wound around the saw wheel.

[0016] Compared with the prior art, the advantage of the present utility model is that the locking mechanism includes a locking member provided on the base shell and capable of rotating. When the locking member rotates to above the cover, the base shell and the cover are locked. The locking member is stuck above the cover to restrict the cover from flipping up and opening. When it is necessary to replace the band saw blade, rotate the locking member to move the locking member away from above the cover. The locking member no longer blocks the opening of the cover, and the cover flips up to open the receiving space, and the band saw blade wound around the saw wheel is removed and replaced. This locking and unlocking method does not require the aid of additional tools and is more simple to operate. Description of the Drawings

[0017] The present utility model will be further described in detail below in conjunction with the drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are only drawn for the purpose of explaining the preferred embodiments and should not be construed as limiting the scope of the present utility model. In addition, unless otherwise specified, the drawings only schematically show the composition or structure of the described object and may include exaggerated displays, and the drawings are not necessarily drawn to scale.

[0018] Figure 1 It is a schematic top view of the band saw;

[0019] Figure 2 It is a schematic bottom view of the band saw;

[0020] Figure 3 It is a schematic exploded view of the locking member and the base shell;

[0021] Figure 4 It is a state diagram when the locking member rotates away from the cover;

[0022] Figure 5 It is a state diagram when the cover is opened after the locking member moves away;

[0023] Figure 6 It is a schematic cross-sectional view of the locking state of the locking member Figure 1 ;

[0024] Figure 7 It is a schematic cross-sectional view of the locking state of the locking member Figure 2 ;

[0025] Figure 8 It is Figure 3 a partial enlarged view of part A of

[0026] Figure 9 It is Figure 6Partial enlarged view of part B;

[0027] Figure 10 is Figure 7 Partial enlarged view of part C;

[0028] Figure 11 is a schematic structural view of the cover;

[0029] Figure 12 is a schematic structural view of the locking member.

[0030] In the figure: 1. Cross-connecting housing; 2. Saw wheel housing; 3. Handle; 4. Band saw blade; 5. Base housing; 6. Cover; 7. Locking mechanism; 8. Locking member; 9. Avoidance notch; 10. Saw wheel; 11. Receiving space; 12. Limit screw; 13. Fixed shaft; 14. Threaded hole; 15. Protrusion; 16. Abutting portion; 17. Horizontally extending portion; 18. Clamping portion; 19. Limiting space; 20. Limiting edge; 21. Limiting portion; 22. Guide bevel; 23. Low position; 24. Rotating column; 25. Step; 26. Accommodating groove; 27. Shaft hole. Detailed implementation manners

[0031] The following will refer to the accompanying drawings to describe in detail the preferred embodiments of the present invention. Those skilled in the art will appreciate that these descriptions are only descriptive and exemplary, and should not be construed as limiting the protection scope of the present invention.

[0032] It should be noted that: Similar reference numerals represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it may not be further defined and explained in subsequent drawings.

[0033] Figures 1 - 12 As shown, the band saw includes two saw wheel housings 2 and a cross-connecting housing 1. The two saw wheel housings 2 are arranged left and right, the cross-connecting housing 1 is arranged between the two saw wheel housings 2, the two saw wheel housings 2 are fixed to the cross-connecting housing 1, a saw wheel 10 is installed in the saw wheel housing 2, and the band saw blade 4 is wound around the saw wheel 10 in the two saw wheel housings 2 for cutting. A motor is installed in the cross-connecting housing 1, and the output shaft of the motor is connected to the saw wheel 10 in one side of the saw wheel housing 2. When the saw wheel 10 rotates, it drives the band saw blade 4 to move for cutting.

[0034] One side of the cross-connecting housing 1 is provided with a handle 3, and a control switch is provided on the handle 3.

[0035] The saw wheel housing 2 includes a base housing 5 hinged on one side and a cover 6. The base housing 5 is fixed to the bridging housing 1. The cover 6 covers the base housing 5, and the cover 6 and the base housing 5 are combined to form a receiving space 11 for receiving the saw wheel 10. A locking mechanism 7 is provided between the other side of the base housing 5 and the other side of the cover 6. The locking mechanism 7 is used to lock the base housing 5 and the cover 6 and restrict the cover 6 from flipping open relative to the base housing 5.

[0036] Figure 2 , Figure 6 , Figure 7 , Figure 9 , Figure 10 As shown in the figures, the locking mechanism 7 includes a locking member 8 provided on the base housing 5 and capable of rotating. When the locking member 8 rotates above the cover 6, the base housing 5 and the cover 6 are locked. The locking member 8 blocks above the cover 6 to restrict the cover 6 from flipping open upward. When the band saw blade 4 needs to be replaced, the locking member 8 is rotated so that the locking member 8 moves away from above the cover 6. The locking member 8 no longer blocks the opening of the cover 6, and the cover 6 flips open upward to open the receiving space 11, and the band saw blade 4 wound around the saw wheel 10 is removed and replaced. This locking and unlocking method does not require additional tools and is more simple to operate.

[0037] Figure 4 , Figure 11 As shown in the figures, the cover 6 is provided with an avoidance notch 9 for the locking member 8 to pass through when closed. When the cover 6 flips and closes, the locking member 8 passes through the avoidance notch 9 so that the locking member 8 can be rotated and stuck above the cover 6.

[0038] The cover 6 is provided with two convex blocks 15. The avoidance notch 9 is located between the two convex blocks 15. An operating space is formed between the two convex blocks 15 for the locking member 8 to rotate inside when the cover 6 and the base housing 5 are closed.

[0039] Figure 9 As shown in the figures, the cover 6 is provided with a abutting portion 16 for the locking member 8 to abut against when locked, and a limiting portion 21 for limiting the locking member 8 in the locked state. A limiting space 19 is formed between the limiting portion 21 and the abutting portion 16. After the locking member 8 passes above the limiting portion 21, it is stuck in the limiting space 19 for limiting, so as to lock the locking member 8 in the locked state and prevent the locking member 8 from rotating and moving away from above the cover 6, thereby opening the cover 6. Both the abutting portion 16 and the limiting portion 21 are provided in the operating space.

[0040] When the locking member 8 moves past the limiting portion 21, elastic deformation occurs due to extrusion between the locking member 8 and the limiting portion 21, so that the locking member 8 can move past the limiting portion 21. After passing the limiting portion 21, due to elastic reset, the limiting portion 21 blocks on one side of the locking member 8, restricting the locking member 8 from rotating and moving away from above the cover 6.

[0041] Figure 10As shown, the locking member 8 includes a rotating column 24 rotatably connected to the base housing 5, and a laterally extending portion 17 extending laterally from the rotating column 24. By rotating the rotating column 24 and the laterally extending portion 17, the laterally extending portion 17 is rotated above the cover 6 to form a lock between the base housing 5 and the cover 6.

[0042] Figure 12 As shown, a clamping portion 18 extending downward is provided at the bottom of the laterally extending portion 17. When the laterally extending portion 17 rotates above the cover 6 to lock, the clamping portion 18 passes above the limiting portion 21 and is clamped into the limiting space 19. At this time, the laterally extending portion 17 abuts against the abutting portion 16, and the clamping portion 18 abuts against the limiting edge 20 on one side of the limiting portion 21, forming a lock on the locking member 8.

[0043] Preferably, a fixed shaft 13 is provided on the base housing 5. The rotating column 24 is sleeved on the fixed shaft 13 and can rotate around the fixed shaft 13. A limiting screw 12 is connected to the fixed shaft 13 to limit the upward detachment of the rotating column 24. Specifically, a shaft hole 27 is provided along the axis inside the rotating column 24. An accommodating groove 26 is connected to the upper end of the shaft hole 27. A step 25 is formed between the accommodating groove 26 and the shaft hole 27. The rotating column 24 is sleeved on the fixed shaft 13 through the shaft hole 27. The limiting screw 12 passes through the accommodating groove 26 and is threadedly connected to the threaded hole 14 on the end face of the fixed shaft 13. The head of the limiting screw 12 is placed in the accommodating groove 26 and is stuck above the step 25, restricting the rotating column 24 from detaching upward from the fixed shaft 13 and rotatably connecting the rotating column 24 to the fixed shaft 13 to rotate around the fixed shaft 13.

[0044] The extending direction of the laterally extending portion 17 is perpendicular to the axis of the fixed shaft 13.

[0045] Preferably, the clamping portion 18 is parallel to the limiting edge 20 to better play a role in restricting the rotation of the laterally extending portion 17 out of the upper part of the cover 6.

[0046] Figure 9 、 Figure 11 As shown, in addition, a guiding bevel 22 for guiding the rotating clamping portion 18 into the limiting space 19 is provided on the limiting portion 21, and a low position 23 for the laterally extending portion 17 and the clamping portion 18 to turn into the upper part of the cover 6 is provided on the side of the guiding bevel 22 away from the limiting space 19. When the cover 6 is closed on the base housing 5, the lower edge of the clamping portion 18 is lower than the highest point of the limiting portion 21.

[0047] Preferably, the limiting portion 21 is a right triangle.

[0048] Preferably, the locking member 8 has elasticity.

[0049] Figures 2 - 5As shown, the working principle is that when the cover 6 and the base shell 5 are locked, the cover 6 is closed on the base shell 5. At this time, the locking piece 8 passes through the avoidance notch 9, and the lateral extension portion 17 is higher than the upper surface of the cover 6, and the lower edge of the clamping portion 18 is lower than the highest point of the limiting portion 21. The locking piece 8 is rotated to make the lateral extension portion 17 and the clamping portion 18 at the bottom thereof first rotate to the low position 23 on one side of the guiding bevel 22, and then pass over the limiting portion 21. When passing over the limiting portion 21, since the lower edge of the clamping portion 18 is lower than the highest point of the limiting portion 21, the clamping portion 18 contacts with the guiding bevel 22 connecting the low position 23 and the limiting space 19, and is guided by the guiding bevel 22. The guiding bevel 22 and the clamping portion 18 squeeze to cause the locking piece 8 to undergo elastic deformation. As the clamping portion 18 rotates, the contact position of the guiding bevel 22 with the clamping portion 18 becomes higher and higher. , so that the deformation of the locking member 8 becomes larger, until the clamping portion 18 enters the limiting space 19 along the guide bevel 22, at which time the clamping portion 18 is no longer squeezed, and the locking member 8 is elastically reset, so that the clamping portion 18 is clamped with the limiting retaining edge 20 on the other side of the guiding bevel 22, and at the same time, the side of the transverse extension portion 17 away from the limiting portion 21 abuts against the abutting portion 16, locking the transverse extension portion 17 in the locked state; when it is necessary to release the lock, the transverse extension portion 17 is bent upward by hand to elastically deform the locking member 8, so that the lower edge of the clamping portion 18 is higher than the limiting retaining edge 20, at this time the limiting portion 21 does not block the locking member 8, and the transverse extension portion 17 is rotated toward the side of the low position 23, and the transverse extension portion 17 is rotated as a whole to a position opposite to the avoidance notch 9, so that the locking of the transverse extension portion 17 to the cover 6 and the base shell 5 is released, so that the cover 6 can be flipped open.

[0050] When the cover 6 is closed on the base shell 5 , the lower edge of the clamping portion 18 is slightly lower than the highest point of the limiting portion 21 , so that the locking member 8 can pass over the limiting portion 21 without a large deformation.

[0051] The above is an introduction to the saw wheel housing locking structure of the band saw provided by the utility model and the band saw. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the utility model and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A saw wheel housing locking structure for a band saw, comprising a saw wheel housing for accommodating a saw wheel, characterized in that: The saw wheel housing includes a base shell and a cover hinged on one side, the cover is covered on the base shell, and the cover and the base shell are combined to form a receiving space for receiving the saw wheel, a locking mechanism is provided between the other side of the base shell and the other side of the cover, the locking mechanism includes a locking part which is arranged on the base shell and can rotate, and the locking part is rotated to the top of the cover to lock the base shell and the cover.

2. The saw wheel housing locking structure of the band saw according to claim 1, characterized in that: The cover is provided with a resting portion for abutting when the locking member is locked, and a limiting portion for limiting the locking member in the locked state, a limiting space is formed between the limiting portion and the resting portion, and when the locking member is rotated and locked, the elastic deformation between the locking member and the limiting portion after extrusion causes the locking member to pass over the limiting portion and be stuck in the limiting space for limitation.

3. The saw wheel housing locking structure of the band saw according to claim 2, characterized in that: The locking component includes a rotating column rotatably connected to the base shell, and a lateral extension portion extending laterally from the rotating column. The bottom of the lateral extension portion is provided with a clamping portion extending downward. When the lateral extension portion is rotated to the top of the cover for locking, the clamping portion passes over the limiting portion and is clamped into the limiting space. The lateral extension portion abuts against the abutting portion, and the clamping portion abuts against the limiting retaining edge on one side of the limiting portion.

4. The saw wheel housing locking structure of the band saw according to claim 3, characterized in that: The limiting part is provided with a guiding bevel for guiding the rotating clamping part into the limiting space. When the cover is closed on the base shell, the lower edge of the clamping part is lower than the highest point of the limiting part.

5. The saw wheel housing locking structure of the band saw according to claim 3, characterized in that: The base shell is provided with a fixed shaft, the rotating column is sleeved on the fixed shaft and can rotate around the fixed shaft, and the fixed shaft is connected with a limiting screw to limit the upward separation of the rotating column.

6. The saw wheel housing locking structure of the band saw according to claim 1, characterized in that: The cover is provided with an escape notch for the locking member to pass through when the cover is closed.

7. The saw wheel housing locking structure of the band saw according to claim 3, characterized in that: The limiting retaining edge is parallel to the clamping portion.

8. The saw wheel housing locking structure of the band saw according to claim 4, characterized in that: The cover is provided with a low position on the upper side of the cover for the lateral extension part and the clamping part to rotate to on the side of the guide bevel away from the limiting space.

9. The saw wheel housing locking structure of the band saw according to claim 6, characterized in that: The cover is provided with two protrusions, the avoidance notch is located between the two protrusions, and an operating space for the locking component to rotate inside is formed between the two protrusions when the cover is closed with the base shell.

10. A band saw, characterized in that A saw wheel housing locking structure of a band saw comprising any one of claims 1 to 9, wherein the saw wheel housing comprises two, the two saw wheel housings being arranged on the left and right, a saw wheel being installed in the saw wheel housing, and a band saw blade for cutting being wound around the saw wheel.

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