Hand saw with saw blade convenient to replace

Abstract

The utility model discloses a hand saw with a saw blade convenient to replace, which belongs to the technical field of hand saws, and comprises a main body frame I, a main body frame II and a saw blade, one end of the main body frame I and one end of the main body frame II are respectively provided with a concentric-square-shaped frame, and the main body frame I and the main body frame II are sleeved with each other through the concentric-square-shaped frames. One end of the second main body frame is fixedly connected with a first connecting frame, one end of the first main body frame is fixedly connected with a second connecting frame, one side of the second connecting frame is fixedly connected with a handle, the lower end of the second connecting frame is in threaded connection with an adjusting mechanism, and one end of the adjusting mechanism and one end of the first connecting frame are fixedly connected with mounting blocks; according to the saw, the saw blades of different lengths can be conveniently replaced and installed by a person, the use requirement of a user is greatly met, the user only needs to carry the saw blades of different lengths when carrying the saw, and the labor burden of the user when carrying the saw is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hand saws, and more specifically to a hand saw with convenient replacement of saw blades. Background Art

[0002] The hand saw is one of the commonly used tools on construction sites. When cutting some thicker workpieces, a longer saw blade is more labor-saving to use. Conversely, when cutting some thinner workpieces, a shorter saw blade is more labor-saving to use. However, the shapes and specifications of hand saws nowadays are relatively fixed. It is not convenient to replace and install saw blades of different lengths during use, and it is not easy to meet the user's needs. If hand saws of different specifications are directly carried, the labor burden of the personnel is large. Therefore, the utility model provides a hand saw for convenient replacement of saw blades. Utility Model Content

[0003] 1. Technical issues to be solved

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a hand saw that is convenient for replacing saw blades, thereby solving the problem that the shapes and specifications of hand saws in the prior art are relatively fixed, it is inconvenient to replace and install saw blades of different lengths during use, and it is not easy to meet the user's usage needs. If hand saws of different specifications are carried directly, the labor burden of personnel is relatively large.

[0005] 2. Technical solution

[0006] To solve the above problems, the utility model adopts the following technical solutions.

[0007] A hand saw for convenient replacement of saw blades, comprising a main frame 1, a main frame 2 and a saw blade, one end of each of the main frame 1 and the main frame 2 is provided with a return frame, the main frame 1 and the main frame 2 are mutually sleeved through the return frame, a limiting mechanism is provided on the return frame, one end of the main frame 2 is fixedly connected to a connecting frame 1, one end of the main frame 1 is fixedly connected to a connecting frame 2, one side of the connecting frame 2 is fixedly connected to a handle, the lower end of the connecting frame 2 is threadedly connected to an adjustment mechanism, the adjustment mechanism and one end of the connecting frame 1 are fixedly connected to a mounting block, one side of the mounting block is fixedly connected to a small threaded rod, and the outer circumferential surface of the small threaded rod is threadedly connected to a nut;

[0008] Both ends of the saw blade are provided with through holes, the through holes at both ends of the saw blade are sleeved on the outer circumferential surface of the small threaded rod, and the nut is clamped on one side of the saw blade.

[0009] Furthermore, the limiting mechanism includes a latch, a connecting block and a spring, the latch passes through and is movably connected to one side of the return frame, one end of the latch is fixedly connected to the connecting block, one side of the connecting block is fixedly connected to the spring, one end of the spring is fixed to the return frame, and limiting holes are provided on the main frame one and the main frame two, and the limiting holes match one end of the latch.

[0010] Furthermore, the adjustment mechanism includes a large threaded rod and a connecting block, one end of the large threaded rod passes through and is threadedly connected to the second connecting frame, one end of the large threaded rod is rotatably connected to the connecting block, and the connecting block is fixed to the mounting block on one side.

[0011] Furthermore, the upper ends of the connecting frame 1 and the connecting frame 2 are fixedly connected with reinforcement blocks, and the reinforcement blocks are in an inclined state.

[0012] Furthermore, a collar is fixedly connected to one side of the nut, and a pair of ear blocks is fixedly connected to the outer circumferential surface of the collar.

[0013] Furthermore, the main frame 1 and the connecting frame 2 as well as the main frame 2 and the connecting frame 1 are connected by fixing blocks and bolts.

[0014] 3. Beneficial effects

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] (1) In this scheme, the main frame of the hand saw is designed as two main frames 1 and 2 that are nested with each other. The main frames 1 and 2 can be contracted and extended to different degrees. After the main frames 1 and 2 are adjusted, the hexagonal nuts are first removed, and the saw blade is installed on the small threaded rod through the through holes at both ends. Then the hexagonal nuts are installed to fix the two ends of the saw blade. Combined with the telescopic adjustment of the main frames 1 and 2, it is convenient for personnel to replace and install saw blades of different lengths, which greatly meets the user's usage needs. Moreover, when carrying the saw, the user only needs to carry saw blades of different lengths, which reduces the user's labor burden when carrying.

[0017] (2) In the present scheme, the main frame 1 and the main frame 2 are specifically arranged on each other through the respective connected return frames. After the main frame 1 and the main frame 2 are adjusted, the pins on the respective return frames will be respectively embedded in the corresponding limit holes, so that the two ends are limited to each other, making the main frame 1 and the main frame 2 more stable after the adjustment.

[0018] (3) This solution can drive the saw blade to stretch to different degrees by rotating the large threaded rod, thereby adjusting the tightness of the saw blade to further meet the user's usage needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 For this utility model Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0021] Figure 3 It is a schematic diagram of the structure of the overall split of the utility model;

[0022] Figure 4 For this utility model Figure 3 Schematic diagram of the enlarged structure at point B in the middle.

[0023] Description of the numbers in the figure:

[0024] 1. Main frame one; 11. Limiting hole; 2. Main frame two; 21. Fixing block; 22. Bolt; 3. Retractable frame; 4. Limiting mechanism; 41. Latch; 42. Connecting block; 43. Spring; 5. Connecting frame one; 6. Connecting frame two; 61. Handle; 62. Reinforcement block; 7. Adjustment mechanism; 71. Large threaded rod; 72. Connecting block; 8. Mounting block; 81. Small threaded rod; 82. Nut; 821. Ring; 822. Ear block; 9. Saw blade; 91. Through hole. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] Example

[0027] like Figure 1-4 As shown, a hand saw for convenient replacement of saw blades comprises a main frame 1, a main frame 2 and a saw blade 9, one end of the main frame 1 and the main frame 2 are both provided with a return frame 3, the main frame 1 and the main frame 2 are mutually sleeved through the return frame 3, a limiting mechanism 4 is provided on the return frame 3, one end of the main frame 2 is fixedly connected with a connecting frame 1 5, one end of the main frame 1 is fixedly connected with a connecting frame 2 6, one side of the connecting frame 2 6 is fixedly connected with a handle 61, the lower end of the connecting frame 2 6 is threadedly connected with an adjusting mechanism 7, the adjusting mechanism 7 and one end of the connecting frame 1 5 are both fixedly connected with a mounting block 8, one side of the mounting block 8 is fixedly connected with a small threaded rod 81, and the outer circumferential surface of the small threaded rod 81 is threadedly connected with a nut 82;

[0028] Through holes 91 are formed at both ends of the saw blade 9 . The through holes 91 at both ends of the saw blade 9 are sleeved on the outer circumferential surface of the small threaded rod 81 , and the nut 82 is clamped on one side of the saw blade 9 .

[0029] The present application designs the main frame of the hand saw as two main frames 1 and 2 which are nested with each other. When in use, the main frames 1 and 2 can be contracted and extended to different degrees. After the main frames 1 and 2 are adjusted, the hexagonal nut 82 is first removed, and the saw blade 9 is installed on the small threaded rod 81 through the through holes 91 at both ends. As the hexagonal nut 82 is installed, the two ends of the saw blade 9 are fixed. Combined with the telescopic adjustment of the main frames 1 and 2, it is convenient for personnel to replace and install saw blades 9 of different lengths, which greatly meets the user's usage needs. Moreover, when carrying, the user only needs to carry saw blades 9 of different lengths, reducing the labor burden of the user when carrying.

[0030] like Figure 1-2 As shown, the limiting mechanism 4 includes a latch 41, a connecting block 42 and a spring 43. The latch 41 passes through and is movably connected to one side of the return frame 3. One end of the latch 41 is fixedly connected to the connecting block 42. One side of the connecting block 42 is fixedly connected to the spring 43. One end of the spring 43 is fixed to the return frame 3. A limiting hole 11 is provided on both the main frame 1 and the main frame 2, and the limiting hole 11 matches one end of the latch 41.

[0031] When in use, the main frame 1 and the main frame 2 are specifically installed on each other through the respectively connected return frames 3. After the main frame 1 and the main frame 2 are adjusted, the pins 41 on each return frame 3 will be respectively embedded in the corresponding limiting holes 11, so that the two ends are limited to each other, so that the main frame 1 and the main frame 2 are more stable after the adjustment.

[0032] like Figure 3-4 As shown, the adjustment mechanism 7 includes a large threaded rod 71 and a connecting block 72. One end of the large threaded rod 71 passes through and is threadedly connected to the connecting frame 6. One end of the large threaded rod 71 is rotatably connected to the connecting block 72, and the connecting block 72 is fixed to the mounting block 8 on one side.

[0033] When in use, the saw blade 9 can be stretched to different degrees by rotating the large threaded rod 71, so that the tightness of the saw blade 9 can be adjusted to further meet the user's usage needs.

[0034] like Figure 3 As shown, the upper ends of the connecting frame 1 5 and the connecting frame 2 6 are fixedly connected with a reinforcing block 62, and the reinforcing block 62 is in an inclined state.

[0035] When in use, a triangular support is formed between the main frame 1 and the connecting frame 2 6 and between the main frame 2 2 and the connecting frame 1 5 through the reinforcement block 62, which can improve the stability of the overall structure.

[0036] like Figure 4 As shown, a collar 821 is fixedly connected to one side of the nut 82 , and a pair of ear blocks 822 are fixedly connected to the outer circumferential surface of the collar 821 .

[0037] When in use, the cooperation between the collar 821 and the ear block 822 makes it convenient for personnel to rotate the nut 82 .

[0038] like Figure 3 As shown, the main frame 1 and the connecting frame 2 6 as well as the main frame 2 2 and the connecting frame 1 5 are connected by fixing blocks 21 and bolts 22 .

[0039] When in use, after unscrewing the bolt 22, the connecting frame 2 6 and the connecting frame 1 5 can be removed from the main frame 1 and the main frame 2, and the whole can be carefully disassembled to facilitate maintenance.

[0040] In summary, the specific working process of the present scheme is as follows: the main frame of the hand saw is designed to be two main frames 1 and 2 which are nested with each other, and the main frames 1 and 2 can be contracted and extended to different degrees. After the adjustment of the main frames 1 and 2 is completed, the hexagonal nut 82 is first removed, and the saw blade 9 is installed on the small threaded rod 81 through the through holes 91 at both ends. As the hexagonal nut 82 is installed, the two ends of the saw blade 9 are fixed. Combined with the telescopic adjustment of the main frames 1 and 2, it is convenient for personnel to replace and install saw blades 9 of different lengths, which greatly meets the user's usage needs. Moreover, when carrying, the user only needs to carry saw blades 9 of different lengths, reducing the labor burden of the user when carrying.

[0041] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A hand saw for conveniently replacing saw blades, comprising a main frame 1 (1), a main frame 2 (2) and a saw blade (9), characterized in that: One end of the main frame 1 (1) and the main frame 2 (2) are both provided with a return frame (3), the main frame 1 (1) and the main frame 2 (2) are mutually sleeved through the return frame (3), a limit mechanism (4) is provided on the return frame (3), one end of the main frame 2 (2) is fixedly connected with a connecting frame 1 (5), one end of the main frame 1 (1) is fixedly connected with a connecting frame 2 (6), one side of the connecting frame 2 (6) is fixedly connected with a handle (61), the lower end of the connecting frame 2 (6) is threadedly connected with an adjustment mechanism (7), one end of the adjustment mechanism (7) and the connecting frame 1 (5) are both fixedly connected with a mounting block (8), one side of the mounting block (8) is fixedly connected with a small threaded rod (81), and the outer circumferential surface of the small threaded rod (81) is threadedly connected with a nut (82); Through holes (91) are provided at both ends of the saw blade (9), the through holes (91) at both ends of the saw blade (9) are sleeved on the outer circumferential surface of the small threaded rod (81), and the nut (82) is clamped on one side of the saw blade (9).

2. A hand saw with convenient saw blade replacement according to claim 1, characterized in that: The limiting mechanism (4) comprises a latch (41), a connecting block (42) and a spring (43); the latch (41) penetrates and is movably connected to one side of the return frame (3); one end of the latch (41) is fixedly connected to the connecting block (42); one side of the connecting block (42) is fixedly connected to the spring (43); one end of the spring (43) is fixed to the return frame (3); and limiting holes (11) are provided on the main frame one (1) and the main frame two (2); the limiting holes (11) match one end of the latch (41).

3. The hand saw with convenient saw blade replacement according to claim 1, characterized in that: The adjustment mechanism (7) comprises a large threaded rod (71) and a connection block (72), one end of the large threaded rod (71) passes through and is threadedly connected to the second connection frame (6), one end of the large threaded rod (71) is rotatably connected to the connection block (72), and the connection block (72) is fixed to a mounting block (8) on one side.

4. The hand saw with convenient saw blade replacement according to claim 1, characterized in that: The upper ends of the connecting frame 1 (5) and the connecting frame 2 (6) are both fixedly connected with a reinforcing block (62), and the reinforcing block (62) is in an inclined state.

5. The hand saw with convenient saw blade replacement according to claim 1, characterized in that: A collar (821) is fixedly connected to one side of the nut (82), and a pair of ear blocks (822) are fixedly connected to the outer circumferential surface of the collar (821).

6. The hand saw with convenient saw blade replacement according to claim 1, characterized in that: The main frame 1 (1) and the connecting frame 2 (6) as well as the main frame 2 (2) and the connecting frame 1 (5) are connected via a fixing block (21) and bolts (22).

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