A saw blade clamping device

Abstract

The utility model discloses a saw blade clamping device, including saw blade, reciprocating rod and be used for connecting saw blade and reciprocating rod's clamping device subassembly, and clamping device subassembly includes guide, locking sleeve and first elastic part, and the upper end of reciprocating rod is provided with the first locking inclined plane along its periphery extension, and the inner wall of locking sleeve is provided with the second locking inclined plane along its periphery with first locking inclined plane corresponding cooperation, the outer peripheral wall of reciprocating rod is provided with the limit protruding, and the inner peripheral wall of locking sleeve is provided with the limit inclined plane with limit protruding corresponding cooperation. Its through clamping device subassembly realizes the quick installation and disassembly of saw blade, and simple and convenient operation, through the abutting cooperation of limit protruding and limit inclined plane, limit locking sleeve to move down relative to reciprocating rod, through the abutting cooperation of first locking inclined plane and second locking inclined plane, limit locking sleeve to move up relative to reciprocating rod. Further realize the up and down limit of locking sleeve, avoid when not installing saw blade, and locking sleeve shakes relative to reciprocating rod.

Description

Technical Field

[0001] This utility model relates to the field of power tool technology, and in particular to a saw blade clamping device. Background Technology

[0002] Jigsaws, as commonly used cutting power tools, rely on a reciprocating rod to drive the saw blade in reciprocating motion to cut workpieces. Because different materials need to be cut, different saw blades need to be replaced; therefore, a device is required that can reliably clamp the saw blade and facilitate quick replacement.

[0003] A typical clamping device consists of a reciprocating rod and a locking sleeve fitted around the saw blade connection end. The locking sleeve has a saw blade insertion port, and the hollow reciprocating rod connection end has a V-groove for engaging the saw blade. When the insertion port aligns with the V-groove, the saw blade can be freely installed and removed. When they are misaligned, the saw blade lug is clamped between the reciprocating rod and the locking sleeve for fixation. Traditional jigsaws use a threaded pair between the reciprocating rod and the locking sleeve, utilizing the threaded engagement to allow relative rotation between the two, switching between the aligned and misaligned states of the insertion port and the V-groove. This reliance on threaded rotation for saw blade installation and removal requires the operator to repeatedly tighten the locking sleeve to align or misalign the saw blade insertion port with the reciprocating rod's V-groove. This cumbersome and time-consuming process fails to meet the demands of rapid saw blade replacement in high-efficiency work scenarios, thus impacting the jigsaw's overall efficiency.

[0004] To address the aforementioned issues, quick-change saw blade structures have been introduced to the market. For example, a quick-change saw blade structure disclosed in Chinese Utility Model Patent (Authorization Announcement No.: CN213053050U) includes a reciprocating rod, a saw blade, a saw blade holder, a saw blade guide component, a first elastic element, and also includes an operating component and a second elastic element. When the lug aligns with the slot, it acts outward on the saw blade, allowing for quick replacement of the saw blade. No additional tools are required for installing or replacing the saw blade, making the operation convenient and quick. However, the quick-change saw blade structure disclosed in the prior art has the following drawbacks: When the saw blade is installed, the operating component, the saw blade holder, and the saw blade maintain a stable connection through abutment, thus preventing abnormal noise; however, when the saw blade is not installed, the operating component and the saw blade holder have an axial gap, resulting in a loose fit and mutual wobbling, producing abnormal noise.

[0005] Therefore, it is necessary to improve the existing technology. Utility Model Content

[0006] The purpose of this utility model is to solve the problem that in the existing quick-change saw blade structure, when the saw blade is not installed, the operating part and the saw blade holder are in a loose fit due to the axial gap, which causes them to shake and produce abnormal noise. Therefore, a saw blade clamping device is proposed.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A saw blade clamping device includes a saw blade, a reciprocating rod, and a clamping device assembly for connecting the saw blade and the reciprocating rod. The clamping device assembly includes: a guide member having a guide portion, the guide member being slidably connected to the reciprocating rod via the guide portion; a locking sleeve rotatably sleeved on the upper end of the reciprocating rod, the locking sleeve having a locked position and an unlocked position relative to the reciprocating rod; when the locking sleeve is in the locked position, the locking sleeve presses the saw blade against the upper end of the reciprocating rod; when the locking sleeve is in the unlocked position, the locking sleeve disengages from the saw blade; and a first elastic element connected to the reciprocating rod. Between the locking sleeve and the locking sleeve, the locking sleeve always tends to move towards the locked position; the upper end of the reciprocating rod is provided with a first locking inclined surface extending circumferentially thereon, and the inner wall of the locking sleeve is provided with a second locking inclined surface corresponding to and cooperating with the first locking inclined surface along its circumferential direction; the outer peripheral wall of the reciprocating rod is provided with a limiting protrusion, and the inner peripheral wall of the locking sleeve is provided with a limiting inclined surface corresponding to and cooperating with the limiting protrusion; when the locking sleeve moves between the locked position and the unlocked position, the limiting protrusion always abuts against and cooperates with the limiting inclined surface, and the first locking inclined surface always abuts against and cooperates with the second locking inclined surface.

[0009] Furthermore, the locking sleeve is provided with a locking step and an unlocking groove that correspond to the guide portion; when the locking sleeve is in the locked position, the guide portion abuts against the locking step; when the locking sleeve is in the unlocked position, the guide portion corresponds to the unlocking groove.

[0010] Furthermore, the inclination angles of the first locking ramp and the second locking ramp are set in opposite directions.

[0011] Furthermore, the reciprocating rod is provided with a receiving cavity, the guide is installed in the receiving cavity, and a second elastic member is also provided in the receiving cavity. The second elastic member abuts against the inner wall of the reciprocating rod and the guide member, so that the guide member always has an axial upward sliding tendency.

[0012] Furthermore, the saw blade has two radially extending and oppositely arranged lugs, which press against the reciprocating rod and the locking sleeve when the locking sleeve is in the locked position.

[0013] Furthermore, the locking sleeve has a crimping part and a socket. When the locking sleeve is in the locked position, the lug of the saw blade engages with the crimping part to axially limit the lug. When the locking sleeve is in the unlocked position, the lug of the saw blade engages with the socket to release the axial limitation of the lug by the crimping part.

[0014] Furthermore, the upper end of the reciprocating rod is provided with a locking groove for locking the saw blade.

[0015] Furthermore, the side wall of the reciprocating rod is provided with a sliding groove that corresponds to and cooperates with the guide portion of the guide member, and the sliding groove extends along the axial direction of the reciprocating rod.

[0016] Furthermore, the reciprocating rod is provided with an insertion hole that engages with one end of the first elastic member, and the locking sleeve is provided with an insertion groove that engages with the other end of the first elastic member.

[0017] Furthermore, the locking sleeve has a radially extending wrench portion.

[0018] The beneficial effects of this utility model after adopting the above structure are as follows:

[0019] (1) A saw blade clamping device according to the present invention includes a saw blade, a reciprocating rod, and a clamping device assembly for connecting the saw blade and the reciprocating rod. The clamping device assembly includes a guide, a locking sleeve, and a first elastic element. The locking sleeve has a locked position and an unlocked position relative to the reciprocating rod. When the locking sleeve is in the locked position, the locking sleeve presses the saw blade against the upper end of the reciprocating rod. When the locking sleeve is in the unlocked position, the locking sleeve disengages from the saw blade. The first elastic element makes the locking sleeve always tend to move towards the locked position. This invention enables quick installation and removal of saw blades via a clamping device assembly, offering simple and convenient operation. When installing the saw blade, push it towards the guide member. The guide member overcomes the elastic force of the second elastic member and moves downwards, causing the guide portion to slide out of the unlocking slot. The locking sleeve rotates under the elastic force of the first elastic member, reaching the locked position. The lug of the saw blade moves to below the pressing part, and the locking sleeve moves downwards under the cooperation of the first and second locking inclined surfaces, thus clamping the lug. When removing the saw blade, simply rotate the locking sleeve, causing it to rotate against the elastic force of the first elastic member. This aligns the lug of the saw blade with the insertion port. Simultaneously, the guide portion moves to the position corresponding to the unlocking slot. Under the elastic force of the second elastic member, the guide portion automatically slides into the unlocking slot, and the saw blade exits from the insertion port under the push of the second elastic member, completing the removal of the saw blade.

[0020] (2) In the saw blade clamping device of this utility model, the upper end of the reciprocating rod is provided with a first locking inclined surface extending circumferentially thereon, and the inner wall of the locking sleeve is provided with a second locking inclined surface corresponding to and cooperating with the first locking inclined surface along its circumferential direction; the outer circumferential wall of the reciprocating rod is provided with a limiting protrusion, and the inner circumferential wall of the locking sleeve is provided with a limiting inclined surface corresponding to and cooperating with the limiting protrusion; when the locking sleeve moves between the locked position and the unlocked position, the limiting protrusion always abuts against the limiting inclined surface, and the first locking inclined surface always abuts against the second locking inclined surface. This utility model restricts the downward movement of the locking sleeve relative to the reciprocating rod by the abutting cooperation of the limiting protrusion and the limiting inclined surface; and restricts the upward movement of the locking sleeve relative to the reciprocating rod by the abutting cooperation of the first locking inclined surface and the second locking inclined surface. Thus, the upper and lower limits of the locking sleeve are achieved, avoiding the mutual shaking and abnormal noise between the locking sleeve and the reciprocating rod due to the axial gap when the saw blade is not installed. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model. Figure 1 (The locking sleeve is in the locked position);

[0023] Figure 2 This is a schematic diagram of the overall structure of this utility model. Figure 2 (The locking sleeve is in the unlocked position);

[0024] Figure 3 This is an exploded view of the overall structure of this utility model;

[0025] Figure 4 This is a cross-sectional view of the overall structure of this utility model (the locking sleeve is in the locked position);

[0026] Figure 5 This is the utility model Figure 4 Enlarged schematic diagram of the structure at point A;

[0027] Figure 6 This is a three-dimensional schematic diagram of the locking sleeve of this utility model;

[0028] Figure 7 This is a cross-sectional view of the locking sleeve of this utility model;

[0029] Figure 8 This is a three-dimensional schematic diagram of the guide component of this utility model;

[0030] Figure 9 This is a three-dimensional schematic diagram of the reciprocating rod of this utility model.

[0031] Figures 1 to 9 The winning number is:

[0032] 1. Saw blade; 11. Lug; 2. Reciprocating rod; 21. First locking bevel; 22. Limiting protrusion; 23. Snap-fit ​​groove; 24. Slide groove; 25. Insertion hole; 3. Clamping device assembly; 31. Guide component; 311. Guide part; 32. Locking sleeve; 321. Second locking bevel; 322. Limiting bevel; 323. Locking step; 324. Unlocking groove; 325. Pressing part; 326. Insertion port; 327. Insertion groove; 328. Wrench part; 33. First elastic element; 4. Second elastic element. Detailed Implementation

[0033] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0034] In the description of this utility model, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, the term "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] In this utility model, unless otherwise explicitly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact, or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this invention are for illustrative purposes only and do not represent the only possible implementation.

[0039] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] like Figures 1 to 9As shown, a saw blade clamping device includes a saw blade 1, a reciprocating rod 2, and a clamping device assembly 3 for connecting the saw blade 1 and the reciprocating rod 2. The clamping device assembly 3 includes: a guide member 31 having a guide portion 311, the guide member 31 being slidably connected to the reciprocating rod 2 through the guide portion 311; a locking sleeve 32, rotatably sleeved on the upper end of the reciprocating rod 2, the locking sleeve 32 having a locked position and an unlocked position relative to the reciprocating rod 2; when the locking sleeve 32 is in the locked position, the locking sleeve 32 presses the saw blade 1 against the upper end of the reciprocating rod 2; when the locking sleeve 32 is in the unlocked position, the locking sleeve 32 disengages from the saw blade 1; and a first elastic member 33 connected to the reciprocating rod 2. Between the lever 2 and the locking sleeve 32, the locking sleeve 32 always tends to move towards the locked position. The upper end of the reciprocating lever 2 is provided with a first locking ramp 21 extending circumferentially therefrom, and the inner wall of the locking sleeve 32 is provided with a second locking ramp 321 corresponding to and engaging with the first locking ramp 21. The outer peripheral wall of the reciprocating lever 2 is provided with a limiting protrusion 22, and the inner peripheral wall of the locking sleeve 32 is provided with a limiting ramp 322 corresponding to and engaging with the limiting protrusion 22. When the locking sleeve 32 moves between the locked and unlocked positions, the limiting protrusion 22 always abuts against the limiting ramp 322, and the first locking ramp 21 always abuts against the second locking ramp 321. The inclination angles of the first locking ramp 21 and the second locking ramp 321 are set in opposite directions. The reciprocating rod 2 is provided with a receiving cavity, the guide member 31 is installed in the receiving cavity, and a second elastic member 4 is also provided in the receiving cavity. The second elastic member 4 abuts against the inner wall of the reciprocating rod 2 and the guide member 31, so that the guide member 31 always has the tendency to slide upward axially.

[0041] Based on the above embodiments, this utility model provides a saw blade clamping device, including a saw blade 1, a reciprocating rod 2, and a clamping device assembly 3 for connecting the saw blade 1 and the reciprocating rod 2. The clamping device assembly 3 includes a guide member 31, a locking sleeve 32, and a first elastic member 33. The locking sleeve 32 has a locked position and an unlocked position relative to the reciprocating rod 2. When the locking sleeve 32 is in the locked position, the locking sleeve 32 presses the saw blade 1 against the upper end of the reciprocating rod 2. When the locking sleeve 32 is in the unlocked position, the locking sleeve 32 disengages from the saw blade 1. The first elastic member 33 ensures that the locking sleeve 32 always tends to move towards the locked position. This utility model achieves quick installation and removal of the saw blade 1 through the clamping device assembly 3, which is simple and convenient to operate. When installing the saw blade 1, push the saw blade 1 towards the guide member 31. The guide member 31 moves downward against the elastic force of the second elastic member 4, so that the guide part 311 slides out from the unlocking groove 324. The locking sleeve 32 rotates under the elastic action of the first elastic member 33. The locking sleeve 32 moves to the locked position, and the lug 11 of the saw blade 1 moves to below the pressing part 325. The locking sleeve 32 is located between the first locking inclined surface 21 and the second locking inclined surface 32. With the cooperation of 1, it moves downward and clamps the lug 11. When disassembling the saw blade 1, simply rotate the locking sleeve 32 so that the locking sleeve 32 overcomes the elastic force of the first elastic element 33 and rotates, so that the lug 11 of the saw blade 1 corresponds to and engages with the insertion port 326. At the same time, the guide part 311 moves to the position corresponding to the unlocking groove 324. Under the elastic force of the second elastic element 4, the guide part 311 automatically slides into the unlocking groove 324. The saw blade 1 is pushed out of the insertion port 326 by the second elastic element 4, thus completing the disassembly of the saw blade 1.

[0042] In this embodiment, the upper end of the reciprocating rod 2 is provided with a first locking ramp 21 extending circumferentially therefrom, and the inner wall of the locking sleeve 32 is provided with a second locking ramp 321 corresponding to and cooperating with the first locking ramp 21 along its circumferential direction; the outer peripheral wall of the reciprocating rod 2 is provided with a limiting protrusion 22, and the inner peripheral wall of the locking sleeve 32 is provided with a limiting ramp 322 corresponding to and cooperating with the limiting protrusion 22; when the locking sleeve 32 moves between the locked position and the unlocked position, the limiting protrusion 22 is always in abutting engagement with the limiting ramp 322, and the first locking ramp 21 is always in abutting engagement with the second locking ramp 321. Through the abutting engagement of the limiting protrusion 22 and the limiting ramp 322, the downward movement of the locking sleeve 32 relative to the reciprocating rod 2 is restricted; through the abutting engagement of the first locking ramp 21 and the second locking ramp 321, the upward movement of the locking sleeve 32 relative to the reciprocating rod 2 is restricted. This allows for upper and lower limits on the locking sleeve 32, preventing the locking sleeve 32 and the reciprocating rod 2 from wobbling and producing abnormal noise due to axial clearance when the saw blade 1 is not installed.

[0043] As another preferred embodiment of this utility model, the saw blade 1 has two radially extending and oppositely arranged lugs 11. When the locking sleeve 32 is in the locked position, the lugs 11 are pressed between the reciprocating rod 2 and the locking sleeve 32. The locking sleeve 32 is provided with a locking step 323 and an unlocking groove 324 that correspond to and cooperate with the guide portion 311. When the locking sleeve 32 is in the locked position, the guide portion 311 abuts against the locking step 323. When the locking sleeve 32 is in the unlocked position, the guide portion 311 corresponds to and cooperates with the unlocking groove 324. The locking sleeve 32 has a crimping portion 325 and a socket 326. When the locking sleeve 32 is in the locked position, the lug 11 of the saw blade 1 engages with the crimping portion 325, thereby axially limiting the lug 11. When the locking sleeve 32 is in the unlocked position, the lug 11 of the saw blade 1 engages with the socket 326, thereby releasing the axial limitation of the lug 11 by the crimping portion 325. In this embodiment, as... Figure 1 and Figure 2 As shown, when the locking sleeve 32 is in the locked position, the guide portion 311 abuts against the locking step 323. At this time, the lug 11 of the saw blade 1 corresponds to the crimping portion 325, so that the crimping portion 325 forms an axial limit on the lug 11. When the locking sleeve 32 is in the unlocked position, the guide portion 311 corresponds to the unlocking groove 324, so that the guide portion 311 can slide along the slide groove 24 into the unlocking groove 324. At this time, the lug 11 of the saw blade 1 corresponds to the insertion port 326, so as to release the axial limit of the crimping portion 325 on the lug 11. The saw blade 1 can be withdrawn from the insertion port 326, realizing the disassembly of the saw blade 1.

[0044] As another preferred embodiment of this utility model, the upper end of the reciprocating rod 2 is provided with a locking groove 23 for locking the saw blade 1. The side wall of the reciprocating rod 2 is provided with a sliding groove 24 that corresponds to and engages with the guide portion 311 of the guide member 31, and the sliding groove 24 extends axially along the reciprocating rod 2. In this embodiment, as... Figure 9 As shown, the snap-fit ​​groove 23 is adapted to engage the lug 11 of the saw blade 1, improving the stability of the saw blade 1 installation. The guide portion 311 slides axially within the slide groove 24, allowing the guide member 31 to slide along a predetermined trajectory, improving operational reliability. In this embodiment, when the locking sleeve 32 is in the unlocked position, the slide groove 24 corresponds to the unlocking groove 324, allowing the guide portion 311 to slide along the slide groove 24 into the unlocking groove 324.

[0045] As another preferred embodiment of this utility model, the reciprocating rod 2 is provided with an insertion hole 25 for insertion and engagement with one end of the first elastic member 33, and the locking sleeve 32 is provided with an insertion groove 327 for insertion and engagement with the other end of the first elastic member 33. In this embodiment, as... Figure 5, Figure 6 and Figure 9 As shown, the two ends of the first elastic member 33 are fixedly connected through the insertion hole 25 and the insertion groove 327, thereby improving the reliability of the installation of the first elastic member 33.

[0046] As another preferred embodiment of this utility model, the locking sleeve 32 has a radially extending wrench portion 328. In this embodiment, as... Figure 1 As shown, the wrench portion 328 is provided to facilitate the application of operating force to the locking sleeve 32.

[0047] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this utility model.

Claims

1. A saw blade clamping device comprising a saw blade (1), a shuttle lever (2) and a clamping device assembly (3) for connecting the saw blade (1) and the shuttle lever (2), characterized in that, The clamping device assembly (3) includes: The guide (31) is slidably connected to the reciprocating rod (2); A locking sleeve (32) is rotatably sleeved on the upper end of the reciprocating rod (2). The locking sleeve (32) has a locked position and an unlocked position relative to the reciprocating rod (2). When the locking sleeve (32) is in the locked position, the locking sleeve (32) presses the saw blade (1) against the upper end of the reciprocating rod (2). When the locking sleeve (32) is in the unlocked position, the locking sleeve (32) disengages from the saw blade (1). The first elastic element (33) is connected between the reciprocating rod (2) and the locking sleeve (32), so that the locking sleeve (32) always tends to move toward the locked position; The upper end of the reciprocating rod (2) is provided with a first locking ramp (21) extending circumferentially thereon, and the inner wall of the locking sleeve (32) is provided with a second locking ramp (321) corresponding to and cooperating with the first locking ramp (21) along its circumferential direction; the outer peripheral wall of the reciprocating rod (2) is provided with a limiting protrusion (22), and the inner peripheral wall of the locking sleeve (32) is provided with a limiting ramp (322) corresponding to and cooperating with the limiting protrusion (22); when the locking sleeve (32) moves between the locked position and the unlocked position, the limiting protrusion (22) always abuts against the limiting ramp (322), and the first locking ramp (21) always abuts against the second locking ramp (321).

2. A saw blade clamping device according to claim 1, characterized in that: The guide member (31) has a guide portion (311), and the locking sleeve (32) is provided with a locking step (323) and an unlocking groove (324) that correspond to and cooperate with the guide portion (311). When the locking sleeve (32) is in the locked position, the guide portion (311) abuts against the locking step (323). When the locking sleeve (32) is in the unlocked position, the guide portion (311) corresponds to and cooperates with the unlocking groove (324).

3. A saw blade clamping device according to claim 1, characterized in that: The first locking ramp (21) and the second locking ramp (321) are set at opposite angles.

4. A saw blade clamping device according to claim 1, characterized in that: The reciprocating rod (2) is provided with a receiving cavity, and the guide (31) is installed in the receiving cavity. A second elastic member (4) is also provided in the receiving cavity. The second elastic member (4) abuts against the inner wall of the reciprocating rod (2) and the guide (31) so that the guide (31) always has the tendency to slide upward axially.

5. A saw blade clamping device according to claim 1, characterized in that: The saw blade (1) has two radially extending and oppositely arranged lugs (11), which are pressed between the reciprocating rod (2) and the locking sleeve (32) when the locking sleeve (32) is in the locked position.

6. A saw blade clamping device according to claim 5, characterized in that: The locking sleeve (32) has a crimping part (325) and a socket (326). When the locking sleeve (32) is in the locked position, the lug (11) of the saw blade (1) is engaged with the crimping part (325) so that the crimping part (325) axially limits the lug (11). When the locking sleeve (32) is in the unlocked position, the lug (11) of the saw blade (1) is engaged with the socket (326) so as to release the axial limitation of the crimping part (325) on the lug (11).

7. A saw blade clamping device according to claim 1, characterized in that: The upper end of the reciprocating rod (2) is provided with a locking groove (23) for locking the saw blade (1).

8. A saw blade clamping device according to claim 2, characterized in that: The side wall of the reciprocating rod (2) is provided with a groove (24) that corresponds to and cooperates with the guide portion (311) of the guide member (31), and the groove (24) extends along the axial direction of the reciprocating rod (2).

9. A saw blade clamping device according to claim 1, characterized in that: The reciprocating rod (2) is provided with a plug hole (25) that is engaged with one end of the first elastic member (33), and the locking sleeve (32) is provided with a plug groove (327) that is engaged with the other end of the first elastic member (33).

10. A saw blade clamping device according to claim 1, characterized in that: The locking sleeve (32) has a radially extending wrench portion (328).

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