Saw blade mounting structure and reciprocating saw

Abstract

The technical scheme belongs to the technical field of reciprocating saws, and particularly relates to a saw blade mounting structure and a reciprocating saw, the saw blade mounting structure comprises a saw blade, a connecting rod and a pressing block, the pressing block is provided with a first mounting groove, the side, facing the inserting direction of the saw blade, of the first mounting groove penetrates through the side wall of the pressing block, and the saw blade is provided with a fixed end used for being embedded into the first mounting groove; the pressing block is provided with a connecting piece, the pressing block penetrates through the connecting hole through the connecting piece and then is connected into the threaded hole, the saw blade abuts against the position between the groove bottom of the first mounting groove and the connecting rod, and therefore it is ensured that the saw blade is stably mounted, looseness of the saw blade is reduced, the mounting process of the saw blade is simplified, and then the production cost is reduced.

Description

Technical Field

[0001] The present technical solution relates to the technical field of reciprocating saws, and in particular to a saw blade mounting structure and a reciprocating saw. Background Art

[0002] The reciprocating saw is a versatile cutting tool, which is classified into manual reciprocating saws and electric reciprocating saws.

[0003] For example, Chinese patent CN201537748U discloses a saw blade mounting structure for a reciprocating saw, including a saw blade for cutting a workpiece; a reciprocating rod having a receiving hole and a through hole connected vertically to each other, the receiving hole being arranged at one end of the reciprocating rod and extending axially along the reciprocating rod; a pressure block being accommodated in the through hole; a saw blade clamping device, including a rotating sleeve with an inner cam surface and a torsion spring, which can be operated to allow the pressure block to have a first position and a second position, the first position being that the pressure block clamps the saw blade in the receiving hole, and the second position being that the saw blade is released, and a biasing device is also arranged in the receiving hole, including a spring and a pressure-applying portion.

[0004] The installation structure of the reciprocating saw blade mentioned above requires the use of more connecting accessories. The saw blade is fixed by assembling multiple accessories together. The installation steps are complicated. At present, each accessory has different levels of production sophistication, and the processing and production are difficult, resulting in high cost investment, which in turn makes the production cost high, and needs to be improved. Summary of the invention

[0005] In order to improve the problem that the installation of saw blades requires more complicated accessories, resulting in higher production costs, the present technical solution provides a saw blade installation structure and a reciprocating saw.

[0006] The purpose of this technical solution is achieved in this way:

[0007] A saw blade mounting structure comprises a saw blade, a connecting rod and a pressure block, wherein the pressure block is provided with a mounting groove, and the mounting groove passes through a side wall of the pressure block on the side facing the saw blade insertion direction, the saw blade has a fixed end for being embedded in the mounting groove, and the pressure block is provided with a connecting piece, and the pressure block presses the saw blade tightly between the bottom of the mounting groove and the connecting rod through the connecting piece.

[0008] Through the above technical solution, when the saw blade mounting structure is in normal use, the fixed end of the saw blade is aligned with the mounting groove one on the pressure block. Based on the fact that one side of the mounting groove one passes through the side wall of the pressure block, the fixed end of the saw blade is quickly and accurately inserted into the mounting groove one for positioning. The side of the pressure block on which the saw blade is mounted is placed against the connecting rod, and the connecting piece is operated to lock so that the pressure block and the connecting rod can be tightly fixed and connected, so that the fixed end is pressed by the pressure block between the connecting rod and the bottom of the mounting groove one, ensuring that the saw blade is firmly installed, reducing looseness, simplifying the installation process of the saw blade, and thus reducing production costs.

[0009] Preferably, the first mounting groove is in interference fit with the fixed end.

[0010] Through the above technical solution, the depth of the first mounting groove is slightly smaller than the size of the fixed end of the saw blade, so that the fixed end can protrude from the notch of the first mounting groove close to the connecting rod side. Through the protruding part, the fixed end can be subjected to extrusion force, improving the connection strength, and thus realizing the normal fixed installation of the saw blade.

[0011] Preferably, the pressing block is provided with a positioning groove, and the width of the positioning groove is adapted to the width of the connecting rod, so that the connecting rod can be embedded in the positioning groove for positioning.

[0012] Through the above technical solution, the side of the pressing block provided with the positioning groove is installed facing the connecting rod. Based on the adaptation of the width of the positioning groove to the width of the connecting rod, the connecting rod is embedded in the positioning groove. The swinging of the pressing block during the connection process is effectively restricted by the two side walls of the groove, improving the installation and positioning effect of the pressing block, and thus improving the accuracy and efficiency of its installation.

[0013] Preferably, the inner walls on opposite sides of the first mounting groove are provided with relief grooves, and both of the two relief grooves communicate with the bottom of the positioning groove.

[0014] Through the above technical solution, relief grooves are provided on the inner walls on opposite sides of the first mounting groove. The two relief grooves reduce the weight of the pressing block and reduce unnecessary material input, thereby further reducing the production cost.

[0015] Preferably, the height difference between the bottom of the first mounting groove and the bottom of the relief groove is 0.8 mm - 3 mm.

[0016] Through the above technical solution, the height difference between the bottom of the first mounting groove and the bottom of the relief groove is limited within a certain range, preventing the positioning effect of the first mounting groove on the saw blade from being weakened due to too small a height difference, and avoiding the swinging and offset of the fixed end into the relief grooves on both sides during the working process, thereby improving the stability.

[0017] Preferably, the connecting rod is provided with a second mounting groove, and the second mounting groove is arranged opposite to the first mounting groove for the fixed end to be embedded.

[0018] Through the above technical solution, the notches of the first mounting groove and the second mounting groove are coplanar. The notches of the two mounting grooves are spliced in alignment to form a space adapted to the fixed end, so that the fixed end can be embedded in the two mounting grooves at the same time and abut against the bottom of the opposite sides, avoiding directly abutting against the connecting rod, and further restricting the swinging and offset of the fixed end in the relief groove during the working process, further enhancing the connection strength and improving the positioning reliability, thereby improving the installation stability.

[0019] Preferably, connection holes are formed in the bottoms of the relief grooves, threaded holes are formed in the connecting rod, and the positions of the threaded holes correspond to the connection holes one by one. The connection holes are for the connecting piece to pass through so that the connecting piece is connected in the threaded hole.

[0020] Through the above technical solution, by providing aligned and conducting connection holes and threaded holes, and the inner side wall of the threaded hole has a thread structure, the connecting piece is screwed into the corresponding threaded hole after passing through the connection hole, and the end of the connecting piece abuts against the side wall of the pressing block. Tightening the connecting piece fixes the pressing block, making the connection simpler and more efficient and improving the installation efficiency.

[0021] Preferably, the two connection holes are arranged diagonally.

[0022] Through the above technical solution, the diagonal arrangement of the connection holes can effectively disperse the connection forces on both sides of the saw blade. The connecting rod usually has a fixed size. When the width of the connecting rod is limited, the space can be utilized more reasonably. Since the connection holes are not arranged in the same row, it avoids weakening the cross-section of the connecting rod in the same direction and maintains the rigidity of the structure at the connection of the connecting rod.

[0023] A reciprocating saw includes a machine base and also includes the saw blade mounting structure described in any one of the above.

[0024] Through the above technical solution, the connecting rod is installed at the front end of the machine base, and a driving device is arranged in the machine base. The saw blade is driven by the driving device to move back and forth for cutting.

[0025] The prominent and beneficial technical effects of this technical solution compared with the prior art are:

[0026] 1. In this technical solution, by providing a first installation groove in the pressing block, one side of the first installation groove penetrates through the side wall of the pressing block, the fixed end of the saw blade is aligned with the first installation groove and embedded for installation, and by operating the connecting piece to lock, the pressing block is tightly connected to the connecting rod so that the fixed end is pressed between the connecting rod and the bottom of the first installation groove, simplifying the installation process of the stable installation of the saw blade and reducing the production cost;

[0027] 2. In this technical solution, by providing a second installation groove in the connecting rod, the second installation groove is arranged in alignment with the first installation groove so that the openings are coplanar, and the fixed end is simultaneously embedded in the two installation grooves, thereby restricting the swing and deviation of the fixed end during the working process and further improving the installation stability;

[0028] 3. In this technical solution, by providing a positioning groove in the pressing block, the width of the positioning groove is adapted to the width of the connecting rod, and the connecting rod can be embedded in the positioning groove for positioning, restricting the swing of the pressing block during the connection process, thereby improving the installation accuracy and installation efficiency. Description of the Drawings

[0029] Figure 1Schematic diagram of the overall structure of this embodiment;

[0030] Figure 2 of this embodiment Figure 1 Schematic diagram of another perspective;

[0031] Figure 3 of this embodiment Figure 2 Schematic diagram of local explosion;

[0032] Figure 4 Schematic diagram of local sectional view of this embodiment;

[0033] Figure 5 Schematic diagram of the overall structure of the pressing block in the embodiment.

[0034] Reference signs: 1, saw blade; 2, connecting rod; 3, pressing block; 4, first installation groove; 5, fixed end; 6, connecting member; 7, positioning groove; 8, relief groove; 9, second installation groove; 10, connecting hole; 11, threaded hole; 100, machine base. Detailed implementation manners

[0035] The following further elaborates on the detailed implementation manners of the technical solution in conjunction with the drawings.

[0036] Embodiment 1:

[0037] Refer to Figure 1 and Figure 2 , a saw blade installation structure, including a saw blade 1, a connecting rod 2 and a pressing block 3. The connecting rod 2 is arranged at the front end of the reciprocating saw and is movably arranged relative to the reciprocating saw, so that the driving device can drive the connecting rod 2 to move back and forth. The pressing block 3 is arranged at one end of the connecting rod 2 extending outwards and abuts against the upper end surface of the connecting rod 2. One end of the saw blade 1 is vertically embedded in the pressing block 3, and it is installed between the pressing block 3 and the connecting rod 2. The sawtooth direction of the saw blade 1 is downward for cutting.

[0038] Refer to Figure 5 , the pressing block 3 is provided with a positioning groove 7. The positioning groove 7 is located on the end surface of the pressing block 3 close to the connecting rod 2. The groove width of the positioning groove 7 is adapted to the width dimension of the connecting rod 2. The groove length of the positioning groove 7 penetrates through the front and rear end surfaces of the pressing block 3, so that its groove direction corresponds to the length direction of the connecting rod 2. The positioning groove 7 is for the connecting rod 2 to be embedded. The pressing block 3 abuts against the connecting rod 2 through the bottom of the positioning groove 7. The left and right opposite inner walls of the positioning groove 7 limit the movement of the pressing block 3.

[0039] The pressing block 3 is provided with an installation groove 4, which is located at the bottom of the positioning groove 7. The side of the installation groove 4 facing the insertion direction of the saw blade 1 passes through the side wall of the pressing block 3. One end of the saw blade 1 has a fixed end 5, and the width of the fixed end 5 matches the width of the installation groove 4. The fixed end 5 is embedded in the installation groove 4 toward the pressing block 3, and the installation groove 4 and the fixed end 5 are interference fit. The fixed end 5 protrudes from the installation groove 4 toward the direction of the positioning groove 7.

[0040] The inner walls on opposite sides of the installation groove 4 are provided with clearance grooves 8, which are symmetrically arranged. The two clearance grooves 8 are connected to the bottom of the positioning groove 7. The bottom of the installation groove 4 is lower than the bottom of the clearance groove 8. There is a height difference between the two bottoms, and the height difference α=0.8mm-3mm, α is preferably 1mm. At this time, the installation groove 4 is in an "L" shape.

[0041] A connecting hole 10 is formed at the bottom of each of the clearance grooves 8 , and vertically passes through the bottom of the clearance groove 8 . The two connecting holes 10 are arranged diagonally opposite to each other.

[0042] See also Figure 3 and Figure 4 The specific connection method between the pressing block 3 and the connecting rod 2 is that the connecting rod 2 is provided with two threaded holes 11, and the inner peripheral wall of the screw hole has a threaded structure. The two threaded holes 11 are connected with the two connecting holes 10 in a one-to-one correspondence. The pressing block 3 is provided with two connecting members 6, and the connecting member 6 is preferably a fixing bolt. The rod body of each connecting member 6 passes through the connecting hole 10 in a one-to-one correspondence and is threadedly connected in the threaded hole 11, and the rod head thereof abuts against the end face of the pressing block 3 on one side away from the connecting rod 2, so that the pressing block 3 is tightly fixed to the connecting rod 2.

[0043] The connecting rod 2 is provided with a mounting groove 2 9, which is located on one end surface of the connecting rod 2 close to the pressure block 3 and is arranged in alignment with the mounting groove 1 4. The vertical opposite sides of the fixed end 5 can be respectively embedded in the two mounting grooves. By tightening the connecting piece 6, the fixed end 5 is pressed between the bottom of the mounting groove 1 4 and the bottom of the mounting groove 2 9.

[0044] A reciprocating saw comprises a machine base 100, and a connecting rod 2 is installed at the front end of the machine base 100.

[0045] The specific working process of this program is as follows:

[0046] In this technical solution, the fixed end 5 of the saw blade 1 is inserted into the first mounting groove 4 on the pressing block 3, and the side of the pressing block 3 with the saw blade 1 installed is abutted against the connecting rod 2. The fixed end 5 and the first mounting groove 4 are in interference fit. The protruding part of the fixed end 5 can be inserted into the second mounting groove 9. The two connecting holes 10 are aligned with the two threaded holes 11. The connecting piece 6 is passed through the corresponding connecting hole 10 and connected to the threaded hole 11 and tightened, so that the pressing block 3 and the connecting rod 2 can be firmly fixed together, thereby realizing that the fixed end 5 is pressed by the pressing block 3 on the connection, ensuring the stable installation of the saw blade 1, reducing looseness, simplifying the installation process of the saw blade 1, and further reducing the production cost.

[0047] Embodiment 2:

[0048] A saw blade mounting structure, which is different from that of Embodiment 1 in that the connecting rod 2 is provided with a protruding abutting portion. The shape and size of the abutting portion are adapted to the first mounting groove 4. The vertical height of the fixed end 5 is less than the depth of the first mounting groove 4. When the convex block is fixedly installed on the connecting rod 2, the abutting portion is inserted into the first mounting groove 4, and the fixed end 5 abuts against the bottom of the first mounting groove 4 and the corresponding end face of the abutting portion respectively.

[0049] The above shows and describes the basic principles, main features and advantages of this technical solution. Those skilled in the art should understand that this technical solution is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of this technical solution. Without departing from the spirit and scope of this technical solution, this technical solution will have various changes and improvements, and these changes and improvements all fall within the scope of this technical solution claimed. The scope of protection required by this technical solution is defined by the appended claims and their equivalents.

Claims

1. A saw blade mounting structure, characterized in that: The invention comprises a saw blade (1), a connecting rod (2) and a pressure block (3); the pressure block (3) is provided with a mounting groove (4), the mounting groove (4) passes through the side wall of the pressure block (3) on the side facing the saw blade (1) insertion direction; the saw blade (1) has a fixed end (5) for being embedded in the mounting groove (4); the pressure block (3) is provided with a connecting piece (6), and the pressure block (3) presses the saw blade (1) between the bottom of the mounting groove (4) and the connecting rod (2) through the connecting piece (6).

2. The saw blade mounting structure according to claim 1, characterized in that: The first installation groove (4) is interference-fitted with the fixed end (5).

3. The saw blade mounting structure according to claim 1, characterized in that: The pressing block (3) is provided with a positioning groove (7), the groove width of which is adapted to the width of the connecting rod (2), so that the connecting rod (2) can be embedded in the positioning groove (7) for positioning.

4. The saw blade mounting structure according to claim 1, characterized in that: The inner walls of the mounting groove 1 (4) on both sides are provided with clearance grooves (8), and the two clearance grooves (8) are both connected to the bottom of the positioning groove (7).

5. The saw blade mounting structure according to claim 4, characterized in that: The height difference between the bottom of the first installation groove (4) and the bottom of the clearance groove (8) is 0.8 mm to 3 mm.

6. The saw blade mounting structure according to claim 1, characterized in that: The connecting rod (2) is provided with a second installation groove (9), which is arranged in alignment with the first installation groove (4) and is used for the fixed end (5) to be embedded.

7. The saw blade mounting structure according to claim 4, characterized in that: The bottom of the clearance groove (8) is provided with a connecting hole (10), and the connecting rod (2) is provided with a threaded hole (11). The positions of the threaded holes (11) are arranged in a one-to-one correspondence with the connecting holes (10). The connecting member (6) passes through the connecting hole (10) so that the connecting member (6) is connected to the threaded hole (11).

8. The saw blade mounting structure according to claim 7, characterized in that: The two connection holes (10) are arranged diagonally opposite to each other.

9. A reciprocating saw, comprising a base (100), characterized in that: It also includes at least one saw blade mounting structure according to any one of claims 1 to 8.

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