Saw frame stress detector and saw

Abstract

The saw frame stress detector comprises a saw frame, one end of the saw frame is provided with a detection assembly for detecting the dependent variable, the lower end of the saw frame is provided with a saw blade, the inner side face of one transverse end of the saw frame is provided with a hidden groove for the saw blade to enter, and openings in the lower ends of positioning grooves are internally provided with fixing blocks connected with the saw blade. Lifting assemblies for driving the saw blades to move up and down are installed on the fixing blocks, extrusion pieces are transversely installed on the inner wall faces of openings in the lower ends of the hidden grooves, and extrusion channels matched with the saw blades in thickness are formed between the extrusion pieces and the hidden grooves. The device is simple in structure, the front-back pulling distance of the saw frame can be limited through the two side rods of the saw frame, and the saw blade is prevented from being directly separated from a to-be-cut material; the saw blade can be lifted into the hidden groove through the lifting assembly, and bent sawteeth on the saw blade can be flattened through the extrusion channel in the entering process of the saw blade, so that the cutting efficiency is ensured; the deformation amount of the saw frame in the pulling process can be detected through the detection assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of saws, and particularly relates to a saw frame stress detector and a saw. Background Art

[0002] A hacksaw is an essential tool for fitter masters and is used to cut hardware materials. Since the hacksaw has a relatively high hardness, it can cut various materials. A saw frame is a tool component that forms a hacksaw after fixing a saw blade. However, in currently used saw frames, most are fixed and cannot adjust the height of the saw blade according to actual usage needs. When pulling and cutting, the saw blade may directly detach from the cut material due to excessive pulling or pushing force, making it difficult or impossible for the saw blade to be inserted into the previously cut gap again. After long-term use of the saw blade, the saw teeth at the bottom of the saw blade are prone to bend outwards, thus affecting the cutting efficiency. At the same time, when not in use, the saw blade can only be disassembled or still fixed on the saw frame. The disassembly method will cause repeated installation of the saw blade, affecting communication, while the method of fixing it on the saw frame will cause inconvenience in storage and is prone to injury, affecting safety. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a saw frame stress detector and a saw that can directly hide the saw blade without disassembly and can change the height of the saw blade, and complete the limit through the saw frame itself to avoid detachment, so as to solve the problems mentioned in the background art.

[0004] The present invention is achieved through the following technical solutions: A saw frame stress detector includes a saw frame. One end of the saw frame is installed with a handle, and the other end of the saw frame is installed with a detection component for detecting strain. The lower end of the saw frame is provided with a saw blade. On the inner side surface of one transverse end of the saw frame, there is a hidden groove for the saw blade to enter. On the inner side surfaces of both side rods of the saw frame, there are positioning grooves communicated with the hidden groove. In the openings at the lower ends of the positioning grooves, there are fixed blocks connected to the saw blade. On the fixed blocks, there are lifting components for driving the saw blade to move up and down. Horizontally installed on the inner wall surface of the lower end opening of the hidden groove is a pressing piece, and a pressing channel matching the thickness of the saw blade is formed between the pressing piece and the hidden groove.

[0005] As a preferred technical solution, a break opening is provided at the upper end of the saw frame. One end of the saw frame where the break opening is located is installed with an adjustment shell. One end of the adjustment shell extends to the other end of the break opening of the saw frame. On both side surfaces of the saw frame, there are connection grooves. Opposite the connection grooves on the inner side surface of the adjustment shell, connection strips protrude. The connection strips are slidably installed in the connection grooves, and the pressing pieces are discontinuously arranged opposite the break openings.

[0006] As a preferred technical solution, the lifting components each include a lead screw, a sealed bearing, and a handwheel. Fixing blocks are each vertically provided with lead screw holes. Mounting holes are provided on the top surface of the saw frame directly opposite the lead screw holes. The sealed bearings are each installed in the mounting holes. The lead screws are each installed in the inner rings of the sealed bearings. The lower ends of the lead screws are each threadedly connected to the lead screw holes, and the upper ends each extend to the outside and are each fixedly connected to the handwheel.

[0007] As a preferred technical solution, fixing grooves are each recessed on one side surface of the fixing blocks. First screw holes are provided on the fixing grooves. Both ends of the saw blade each extend into the fixing grooves, and through holes provided at both ends of the saw blade itself are arranged opposite to the first screw holes. Screws for pressing and fixing the saw blade on the fixing block are threadedly connected in the through holes and the first screw holes.

[0008] As a preferred technical solution, the detection component includes a housing, a cover plate, a storage battery, a main board, a strain gauge, and an accelerometer. The housing is installed at one end of the saw frame away from the handle. A partition is installed inside the housing. The inside of the housing is separated into a power storage cavity and a detection cavity by the partition. The storage battery is installed in the power storage cavity. The main board and the accelerometer are both installed inside the detection cavity. The input and output ends of the strain gauge are welded and fixed to the main board. The main board and the accelerometer are both powered by the storage battery.

[0009] As a preferred technical solution, the inside of the main board includes a wireless transmission module. The data detected by the strain gauge and the accelerometer are processed by the main board, and the data are transmitted to an external terminal through the wireless transmission module.

[0010] As a preferred technical solution, limiting grooves are provided on the bottom surfaces of the fixing blocks. Limiting portions are each protruded on the inner wall surface of the lower end opening of the positioning groove directly opposite the limiting grooves. The limiting portions are each inserted into the positioning grooves.

[0011] As a preferred technical solution, the cross sections of the connecting grooves and the connecting strips are each arranged in a trapezoidal structure. A plurality of second screw holes are provided in one of the connecting grooves. A third screw hole is provided in one of the connecting strips. A bolt is threadedly connected in the third screw hole, and one end of the bolt is threadedly connected in the corresponding second screw hole.

[0012] As a preferred technical solution, the extrusion channel is vertically opposite to the saw blade.

[0013] A saw, including the saw frame stress detector described above.

[0014] The beneficial effects of the present invention are as follows: 1. The fixing block can be moved up and down through the lifting component, and the fixing block synchronously drives the saw blade, so that the height of the saw blade can be changed. After the bottom surface of the saw blade is higher than the two side rods of the saw frame, the two side rods of the saw frame can be arranged on both sides of the material to be cut. During the pulling process, the front and rear distances of the pulling of the saw frame can be limited by the two side rods of the saw frame, avoiding the saw blade directly detaching from the material to be cut;

[0015] 2. When not in use, the saw blade can be lifted into the hidden groove through the lifting component, effectively hiding the saw blade, avoiding inconvenient storage and injury caused by exposure, increasing safety. During the process of the saw blade entering, the bent saw teeth on the saw blade can be flattened through the extrusion channel to ensure the cutting efficiency.

[0016] 3. The detection component can detect the deformation amount of the saw frame during the pulling process, calculate the magnitude of the resistance received by the saw blade, the duration of the resistance magnitude, and then calculate the work done. It can also detect the pulling speed, thereby controlling the cutting frequency and cutting at a more labor-saving speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a bottom view of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the detection component in the present invention;

[0021] Figure 4 It is a schematic diagram of the structure of the saw blade and the lifting component in the present invention;

[0022] Figure 5 It is a schematic diagram of the structure of the saw frame after removing the saw blade in the present invention.

[0023] Among them, 1. Saw frame; 2. Saw blade; 3. Fixed block; 4. Screw; 5. Detection component; 6. Lead screw; 7. Handwheel; 8. Connection groove; 9. Connection strip; 11. First screw hole; 12. Bolt; 13. Adjusting shell; 14. Handle; 15. Hidden groove; 16. Positioning groove; 17. Extrusion piece; 18. Limiting part; 19. Shell; 21. Partition board; 22. Battery; 23. Strain gauge; 24. Main board; 25. Accelerometer; 26. Sealed bearing; 27. Fixed groove; 28. Limiting groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0025] All features disclosed in this specification, or all steps in the disclosed methods or processes, except for mutually exclusive features and / or steps, can be combined in any manner.

[0026] Any feature disclosed in this specification (including any additional claims, abstract, and drawings), unless specifically stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless specifically stated, each feature is only an example of a series of equivalent or similar features.

[0027] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown in

[0028] In this embodiment, a break opening is provided at the upper end of the saw frame 1. One end of the saw frame 1 located at the break opening is provided with an adjustment shell 13. One end of the adjustment shell 13 extends to the other end of the break opening of the saw frame 1. Connecting grooves 8 are provided on both side surfaces of the saw frame 1. Connecting strips 9 are convexly formed on the inner side surfaces of the adjustment shell 13 corresponding to the connecting grooves 8. The connecting strips 9 are slidably installed in the connecting grooves 8. The pressing pieces 17 are discontinuously arranged corresponding to the break opening, so that the presence of the pressing pieces does not affect the change in the length of the saw frame.

[0029] In this embodiment, the lifting assemblies each include a lead screw 6, a sealed bearing 26, and a handwheel 7. Screw holes are vertically provided on the fixing blocks 3. Mounting holes are provided on the top surface of the saw frame 1 corresponding to the holes of the lead screws 6. The sealed bearings 26 are installed in the mounting holes. The lead screws 6 are installed in the inner rings of the sealed bearings 26. The lower ends of the lead screws 6 are threadedly connected to the screw holes and the upper ends extend to the outside and are fixedly connected to the handwheels 7.

[0030] In this embodiment, one side surface of the fixing block 3 is recessed to form a fixing groove 27, and the fixing groove 27 is provided with a first screw hole 11. Both ends of the saw blade 2 extend into the fixing groove 27, and the through holes at both ends of the saw blade 2 are arranged opposite to the first screw hole 11. The through holes and the first screw holes 11 are threadedly connected with screws 4 that press the saw blade 2 to fix it on the fixing block 3. The saw blade can be locked and fixed by the screws. After removing the screws, the saw blade can be quickly removed, which facilitates the installation and removal of the saw blade.

[0031] In this embodiment, the detection component 5 includes a shell 19, a cover plate, a battery 22, a main board 24, a strain gauge 23 and an accelerometer 25. The shell 19 is installed on the end of the saw frame 1 away from the handle 14. A partition 21 is installed inside the shell 19. The interior of the shell 19 is divided into a storage chamber and a detection chamber by the partition 21. The battery 22 is installed in the storage chamber, the main board 24 and the accelerometer 25 are both installed inside the detection chamber, the input and output ends of the strain gauge 23 are welded and fixed to the main board 24, and the main board 24 and the accelerometer 25 are both powered by the battery 22.

[0032] In this embodiment, the main board 24 includes a wireless transmission module. The data detected by the strain gauge 23 and the accelerometer 25 are processed by the main board 24 and transmitted to an external terminal through the wireless transmission module. The wireless transmission module includes Bluetooth. The wireless Bluetooth on the mobile phone can be connected to the wireless transmission module, so that the detected data can be directly viewed through the software on the mobile phone.

[0033] In this embodiment, a limiting groove 28 is provided on the bottom surface of the fixing block 3 , and the inner wall surface of the lower opening of the positioning groove 16 protrudes opposite to the limiting groove 28 to form a limiting portion 18 , and the limiting portion 18 is inserted into the positioning groove 16 .

[0034] In this embodiment, the cross-sections of the connecting groove 8 and the connecting strip 9 are both arranged in a trapezoidal structure, and a plurality of second screw holes are arranged on one side of the connecting groove 8, and a third screw hole is arranged on one side of the connecting strip 9, and a bolt 12 is threadedly connected in the third screw hole, and one end of the bolt 12 is threadedly connected in the corresponding second screw hole;

[0035] Among them, due to the separated setting in the middle of the saw frame, after the saw blade becomes loose, the saw frame can be pulled outward to straighten the saw blade. After ensuring the stability of the saw blade, the bolt can be threadedly connected in the second screw hole and the third screw hole to fix the moved saw blade. In the process of pulling the saw frame apart, the connecting strip on the adjusting shell can move along the connecting groove, so that the broken ends of the saw frame can be connected together to avoid separation.

[0036] In this embodiment, the extrusion channel is arranged vertically opposite to the saw blade 2, so that after the saw blade moves upward, it can smoothly enter the hidden groove through the extrusion channel, and the height of the hidden groove is greater than the height of the saw blade, so that the entire saw blade can enter the interior of the hidden groove.

[0037] A saw, comprising the saw frame stress detector described above.

[0038] During use, the handwheel can be rotated. The rotation of the handwheel drives the lead screw. The rotating lead screw can drive the fixed block to move up or down along the positioning groove. The fixed block synchronously drives the saw blade, so that the height of the saw blade can be changed. After the bottom surface of the saw blade is higher than the two side rods of the saw frame, the saw frame can be directly arranged outside the component to be detected. The two side rods on the saw frame can be arranged on both sides of the material to be cut. During the pulling process, the front and rear distances of the pulling of the saw frame can be restricted by the two side rods of the saw frame, preventing the saw blade from directly detaching from the material to be cut.

[0039] When not in use, the saw blade can be lifted into the hidden groove through the lifting component, effectively hiding the saw blade, avoiding inconvenience in storage and injury caused by exposure, increasing safety. And during the process of the saw blade entering, the bent saw teeth on the saw blade can be flattened through the extrusion channel to ensure the cutting efficiency.

[0040] Among them, during the cutting process, the saw frame needs to be pulled and moved. A detection component is installed on the saw frame. Through the detection component, the deformation amount of the saw frame during the pulling process can be detected, the magnitude of the resistance received by the saw blade can be calculated, and the duration of the resistance magnitude can be calculated, so as to calculate the work done. And the pulling speed can be detected, thereby controlling the cutting frequency to perform cutting at a more labor-saving speed.

[0041] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any change or replacement that can be thought of without creative work should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.

Claims

1. A saw frame stress detector, characterized in that: It includes a saw frame (1). One end of the saw frame (1) is equipped with a handle (14), and the other end of the saw frame (1) is equipped with a detection component (5) for detecting strain. The lower end of the saw frame (1) is provided with a saw blade (2). A hidden groove (15) for the saw blade (2) to enter is provided on the inner side surface of the transverse end of the saw frame (1). Positioning grooves (16) communicating with the hidden groove (15) are provided on the inner side surfaces of both side rods of the saw frame (1). Fixed blocks (3) connected to the saw blade (2) are installed in the openings at the lower ends of the positioning grooves (16). Lifting components for driving the saw blade (2) to move up and down are installed on the fixed blocks (3). An extrusion piece (17) is horizontally installed on the inner wall surface of the lower end opening of the hidden groove (15). An extrusion channel matching the thickness of the saw blade (2) is formed between the extrusion piece (17) and the hidden groove (15).

2. The saw frame stress detector according to claim 1, wherein: A break opening is provided at the upper end of the saw frame (1). An adjustment shell (13) is installed at one end of the saw frame (1) located at the break opening. One end of the adjustment shell (13) extends to the other end of the break opening of the saw frame (1). Connection grooves (8) are provided on both side surfaces of the saw frame (1). Connection strips (9) protruding are formed on the inner side surfaces of the adjustment shell (13) opposite to the connection grooves (8). The connection strips (9) are all slidably installed in the connection grooves (8). The extrusion pieces (17) are all discontinuously arranged opposite to the break opening.

3. The saw frame stress detector according to claim 1, characterized in that: The lifting components each include a lead screw (6), a sealed bearing (26), and a handwheel (7). Screw holes for the lead screws (6) are vertically provided on the fixed blocks (3). Installation holes are provided on the top surface of the saw frame (1) opposite to the screw holes for the lead screws. The sealed bearings (26) are all installed in the installation holes. The lead screws (6) are all installed in the inner rings of the sealed bearings (26). The lower ends of the lead screws (6) are all threadedly connected to the screw holes for the lead screws, and the upper ends all extend to the outside and are fixedly connected to the handwheels (7).

4. The saw frame stress detector according to claim 1, characterized in that: Fixing grooves (27) are recessed on one side surface of each of the fixed blocks (3). First screw holes (11) are provided on the fixing grooves (27). Both ends of the saw blade (2) extend into the fixing grooves (27), and through holes provided on both ends of the saw blade (2) itself are arranged opposite to the first screw holes (11). Screws (4) for pressing and fixing the saw blade (2) on the fixed blocks (3) are threadedly connected in the through holes and the first screw holes (11).

5. The saw frame stress detector according to claim 1, characterized in that: The detection component (5) includes a housing (19), a cover plate, a storage battery (22), a main board (24), a strain gauge (23), and an accelerometer (25). The housing (19) is installed at one end of the saw frame (1) away from the handle (14). A partition (21) is installed inside the housing (19). The inside of the housing (19) is separated into a power storage chamber and a detection chamber by the partition (21). The storage battery (22) is installed in the power storage chamber. The main board (24) and the accelerometer (25) are both installed inside the detection chamber. The input and output ends of the strain gauge (23) are welded and fixed to the main board (24). The main board (24) and the accelerometer (25) are both powered by the storage battery (22).

6. The saw frame stress detector according to claim 5, characterized in that: The inside of the main board (24) includes a wireless transmission module. The data detected by the strain gauge (23) and the accelerometer (25) are processed by the main board (24), and the data is transmitted to an external terminal through the wireless transmission module.

7. The saw frame stress detector according to claim 1, characterized in that: Limit grooves (28) are provided on the bottom surfaces of the fixed blocks (3). Limiting portions (18) protrude from the inner wall surfaces of the lower openings of the positioning grooves (16) opposite to the limit grooves (28), and the limiting portions (18) are inserted into the positioning grooves (16).

8. The saw frame stress detector according to claim 2, wherein: The cross-sections of the connecting grooves (8) and the connecting bars (9) are both trapezoidal structures, and a plurality of second screw holes are provided in one side of the connecting groove (8), and a third screw hole is provided in one side of the connecting bar (9). A bolt (12) is threadedly connected in the third screw hole, and one end of the bolt (12) is threadedly connected to the corresponding second screw hole.

9. The saw frame stress detector according to claim 1, wherein: The extrusion channel is vertically opposite to the saw blade (2).

10. A saw, characterized in that: It includes a saw frame stress detector according to any one of claims 1-9.

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