Hand saw

Abstract

The utility model belongs to the technical field of hand saws, and discloses a hand saw which comprises a bow frame, a handle fixedly connected with the bow frame and a saw blade detachably installed on the bow frame, a sweeping and scraping strip is installed on the bow frame in a rotating mode and comprises two swing plates, brush plates are arranged on the swing plates, and the brush plates are connected with the bow frame in a rotating mode. The two swing plates are symmetrically arranged on the bow frame, the swing plates are matched with the bow frame in a swing mode, the saw blade is located between the two brush plates, a clamping block is arranged on the bow frame, and clamping hooks matched with the clamping block are arranged on the swing plates. The clamping block is pushed to the end, away from the corresponding clamping hook, in the movable groove, the spring stores elastic potential energy, when the swing rod and the saw blade are in the horizontal state, the clamping block is loosened, the spring releases the elastic potential energy, then the clamping block is pushed to be matched with the clamping hook, and therefore when cutting operation needs to be carried out, the sweeping and scraping strip can be folded; therefore, interference is avoided in the cutting process.

Description

Technical Field

[0001] The utility model belongs to the technical field of manual saws, and particularly relates to a manual saw. Background Art

[0002] When a manual saw is performing a cutting operation, a large amount of heat is generated due to the friction between the saw blade and the workpiece, causing the saw blade to heat up and expand. Moreover, sawdust left over from the cutting remains between the saw kerf and the saw teeth, and this sawdust remaining between the saw kerf and the saw teeth makes it difficult to pull the manual saw, thus reducing the cutting efficiency.

[0003] After retrieval, a Chinese utility model patent (authorization publication number: CN219234138U) provides a manual saw, which includes a bow frame. At both ends of the bow frame, there are clamping plates bolted and fixed. Both ends of the saw blade are clamped and fixed by the clamping plates. The front end of the saw blade passes through the clamping plate and is rotatably connected to a butterfly tail adjusting bolt, and the butterfly tail adjusting bolt is threadedly connected to the clamping plate. One end of the bow frame is welded and fixed with a handle. The tail end of the saw blade passes through the clamping plate and a tail end clamping frame is clamped at its tail end. Scraper bars are symmetrically and pivotally arranged on the bow frame. An upwardly open upper clamping opening is provided at the upper end of the scraper bar, and a rotating shaft rotatably arranged on the bow frame is provided between the upper clamping openings.

[0004] The above-mentioned prior art cleans the saw blade on the manual saw by installing a scraper bar. However, since the scraper bar swings and scrapes during the process of using the manual saw for cutting, such a cleaning method will cause interference between the manual saw and the hand or the workpiece during the use process by the user, and there will also be a situation of pinching hands, which is rather inconvenient. Therefore, it is urgent to improve this shortcoming. Summary of the Utility Model

[0005] The purpose of the present utility model is to address the above problems. The present utility model provides a manual saw, which has the advantage of being able to store the scraper bar.

[0006] To achieve the above object, the present utility model provides the following technical solution: It includes a bow frame, a handle fixedly connected to the bow frame, and a saw blade detachably installed on the bow frame. A scraper bar is rotatably installed on the bow frame. The scraper bar includes two swing plates, and brush plates are provided on both swing plates. The two swing plates are symmetrically arranged on the bow frame, and the swing plates are swingably matched with the bow frame. The saw blade is located between the two brush plates. A clamping block is provided on the bow frame, and a clamping hook cooperating with the clamping block is provided on the swing plate.

[0007] Preferably, an activity groove is provided on the bow frame, the clamping block is movably arranged in the activity groove, and the activity groove is arranged along the length direction of the saw blade.

[0008] Preferably, a spring is abutted and provided between the clamping block and the movable slot.

[0009] Preferably, a limiting plate is provided on the clamping block, and the limiting plate is in stop cooperation with the hook.

[0010] Preferably, a sliding groove is provided on the swing plate, a movable plate is slidably arranged in the sliding groove, the brush plate is arranged on the movable plate, and an adjusting component for driving the movable plate to move is arranged on the swing plate.

[0011] Preferably, the adjusting component includes a knob and a gear. The knob is rotatably installed on the swing plate. The gear is arranged in the middle of the knob and is located between the two swing plates. A rack is arranged on the movable plate, and the rack is meshed and connected with the gear.

[0012] Preferably, a torsion spring is abutted between the knob and the bow frame.

[0013] Preferably, the brush plate includes a mounting plate and a brush body, and the brush body is detachably installed on the mounting plate.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] A manual saw provided by the present utility model swings the swing plate upward manually, pushes the clamping block towards one end of the movable slot away from the corresponding hook, and the spring stores elastic potential energy. When the swing rod and the saw blade are in a horizontal state, the clamping block is released, and the spring releases the elastic potential energy, thereby pushing the clamping block to cooperate with the hook. Therefore, when cutting operations are required, the scraping strip can be retracted, so that interference will not occur during the cutting process, improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0017] Figure 2 is a front structural schematic diagram of the present utility model;

[0018] Figure 3 position Figure 2 is a sectional structural schematic diagram of A-A;

[0019] Figure 4 is Figure 2 is an enlarged structural schematic diagram of B.

[0020] Description of the Drawings: 10. Movable groove; 11. Bow frame; 12. Grip; 13. Saw blade; 2. Scraping bar; 20. Sliding groove; 21. Swing plate; 22. Hook; 3. Adjusting assembly; 31. Knob; 32. Movable plate; 33. Brush plate; 331. Mounting plate; 332. Brush body; 34. Rack; 35. Gear; 4. Block; 41. Limiting plate; 5. Spring. Detailed Implementation Manner

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] As Figures 1-4 shown, a hand saw includes a bow frame 11, a grip 12 fixedly connected to the bow frame 11, and a saw blade 13 detachably installed on the bow frame 11. A scraping bar 2 is rotatably installed on the bow frame 11. In this application, there are two scraping bars 2, and the two scraping bars 2 are arranged in the length direction of the bow frame 11. Each scraping bar 2 includes two swing plates 21. Brush plates 33 are provided on the swing plates 21. The two swing plates 21 are symmetrically arranged on the bow frame 11 along the width direction of the bow frame 11. The swing plates 21 are swingably matched with the bow frame 11. The saw blade 13 is located between the two brush plates 33. A block 4 is provided on the bow frame 11, and a hook 22 cooperating with the block 4 is provided on the swing plate 21. A limiting plate 41 is provided on the block 4, and the limiting plate 41 is in a stop cooperation with the hook 22, so that the cooperation between the hook 22 and the hook 22 can be more stable.

[0023] A movable groove 10 is provided on the bow frame 11. The block 4 is movably arranged in the movable groove 10, and the movable groove 10 is arranged along the length direction of the saw blade 13. A spring 5 is abutted between the block 4 and the movable groove 10. The spring 5 always has a tendency to push the block 4 to cooperate with the corresponding hook 22, so that the stability when the hook 22 cooperates with the block 4 can be stronger.

[0024] Preferably, a sliding groove 20 is provided on the swing plate 21. The sliding groove 20 is arranged along the length direction of the swing plate 21. A movable plate 32 in sliding fit is arranged in the sliding groove 20. The brush plate 33 is arranged on the movable plate 32, and the two brush plates 33 are arranged oppositely. An adjusting assembly 3 for driving the movable plate 32 to move is provided on the swing plate 21.

[0025] The adjusting assembly 3 includes a knob 31 and a gear 35. The knob 31 is rotatably installed on the swing plate 21. The gear 35 is arranged in the middle of the knob 31 and is located between the two swing plates 21. Rack bars 34 are provided on the movable plates 32, and the rack bars 34 are meshed with the gear 35. Therefore, by rotating the knob 31, the gear 35 is driven to rotate, then the rack bars 34 are driven to move, and then the movable plates 32 and the brush plate 33 are driven to move, thus realizing the function of cleaning the saw blade 13.

[0026] A torsion spring is provided between the knob 31 and the bow frame 11. When the knob 31 is rotated to drive the brush plate 33 to move to the side away from the saw blade 13, the torsion spring is twisted and stressed.

[0027] The brush plate 33 includes a mounting plate 331 and a brush body 332. The brush body 332 is detachably installed on the mounting plate 331, so that the brush plate 33 with more sawdust can be removed and replaced, thus improving the effect of subsequent cleaning of the saw blade 13.

[0028] When it is necessary to clean the sawdust on the saw blade 13, at this time, by rotating the knob 31, the gear 35 is driven to rotate, then the torsion spring is twisted to store elastic potential energy, then the rack bar 34 is driven to move along the length direction of the sliding groove 20 to the side away from the saw blade 13, then the movable plate 32 is driven to move to the side away from the saw blade 13, then the brush plate 33 is driven to move to the side away from the saw blade 13, and then the brush plate 33 cleans the saw blade 13. And when the knob 31 is released, the torsion spring releases the elastic potential energy, then drives the knob 31 and the gear 35 to rotate in the reverse direction, then drives the rack bar 34 to move along the length direction of the sliding groove 20 to the side close to the saw blade 13, then drives the movable plate 32 to move to the side close to the saw blade 13, and then drives the brush plate 33 to move to the side close to the saw blade 13, so as to clean the saw blade 13 again, and different positions of the saw blade 13 can be cleaned through the swing plate 21.

[0029] When using a hand saw, at this time, manually swing the swing plate 21 upward, push the block 4 to the end of the movable groove 10 away from the corresponding hook 22, the spring 5 stores elastic potential energy, and when the swing rod and the saw blade 13 are in a horizontal state, release the block 4, and the spring 5 releases the elastic potential energy, then pushes the block 4 to cooperate with the hook 22. Therefore, when cutting operations are required, the scraping strip 2 can be retracted, so that interference will not occur during the cutting process, improving the user experience.

[0030] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0031] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A hand saw, comprising a bow frame (11), a grip (12) fixedly connected to the bow frame (11), and a saw blade (13) detachably mounted on the bow frame (11), wherein a scraping bar (2) is rotatably mounted on the bow frame (11), and it is characterized in that: The scraping bar (2) includes two swing plates (21), brush plates (33) are provided on the swing plates (21), the two swing plates (21) are symmetrically arranged on the bow frame (11), the swing plates (21) are swingably matched with the bow frame (11), the saw blade (13) is located between the two brush plates (33), a clamping block (4) is provided on the bow frame (11), and a hook (22) matched with the clamping block (4) is provided on the swing plate (21).

2. A hand saw according to claim 1, wherein: An activity groove (10) is provided on the bow frame (11), the clamping block (4) is movably arranged in the activity groove (10), and the activity groove (10) is arranged along the length direction of the saw blade (13).

3. The hand saw according to claim 2, characterized in that: A spring (5) is abutted between the clamping block (4) and the activity groove (10).

4. A hand saw according to claim 2, wherein: A limiting plate (41) is provided on the clamping block (4), and the limiting plate (41) is in stop cooperation with the hook (22).

5. A hand saw according to claim 1, characterized in that: A sliding groove (20) is provided on the swing plate (21), a movable plate (32) in sliding fit is arranged in the sliding groove (20), the brush plate (33) is arranged on the movable plate (32), and an adjusting component (3) for driving the movable plate (32) to move is provided on the swing plate (21).

6. The hand saw according to claim 5, characterized in that: The adjusting component (3) includes a knob (31) and a gear (35), the knob (31) is rotatably installed on the swing plate (21), the gear (35) is arranged in the middle of the knob (31), and the gear (35) is located between the two swing plates (21), a rack (34) is provided on the movable plate (32), and the rack (34) is meshed with the gear (35).

7. A hand saw according to claim 6, characterized in that: A torsion spring is abutted between the knob (31) and the bow frame (11).

8. A hand saw according to claim 1, characterized in that: The brush plate (33) includes a mounting plate (331) and a brush body (332), and the brush body (332) is detachably installed on the mounting plate (331).

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