Saw blade quick clamping structure and reciprocating saw

Abstract

The invention relates to the field of electric tools, in particular to a saw blade quick clamping structure and a reciprocating saw, the saw blade quick clamping structure comprises a chuck inner ring, a first positioning piece, a second positioning piece and a chuck outer ring, and one side of the chuck outer ring is connected with an elastic reset piece; when the chuck outer ring is located at a first rotating position relative to the chuck inner ring, the inner wall surface of the chuck outer ring can extrude the first positioning piece and / or the second positioning piece, so that clamping force is formed between the first positioning piece and the second positioning piece to clamp and fix the saw blade main body; when the chuck outer ring is located at a second rotating position relative to the chuck inner ring, the clamping force of the first positioning piece and the second positioning piece on the saw blade main body is relieved; the saw blade quick clamping structure further comprises a locking piece limited in the circumferential direction, and the locking piece can be close to the chuck outer ring under the action of elastic force, so that the chuck outer ring is locked in the circumferential direction and kept at the second rotating position. After the saw blade quick clamping structure is mounted on the reciprocating saw, the saw blade can be quickly disassembled and assembled by one hand, and the quick clamping structure is self-locked and prevented from resetting in a loosening state.

Description

Technical Field

[0001] The present application relates to the field of electric tools, and in particular to a saw blade quick clamping structure and a reciprocating saw. Background Art

[0002] A reciprocating saw is a power tool that uses a high-speed reciprocating motion to cut. Its blades need to be frequently replaced to adapt to varying working conditions. Traditional saw blade clamping mechanisms often use bolt-fastening or clamping mechanisms, which can be cumbersome to operate, prone to jamming, and inefficient replacement.

[0003] In the existing technology, such as the "reciprocating saw quick clamping mechanism" disclosed in patent CN208276286U, the outer ring of the chuck is rotated to drive the pin to slide along the Archimedean spiral trajectory to achieve the clamping and loosening of the blade. Although this mechanism solves the problem of the block-type structure getting stuck, it still has the following defects:

[0004] Inconvenience in operation: When replacing the saw blade, you need to manually rotate the outer ring of the chuck and keep the saw blade in position simultaneously, which is not possible to operate with one hand;

[0005] No self-locking function: When replacing the saw blade, the outer ring of the chuck needs to be kept loose by external force, and it is easy to reset accidentally during the replacement process. Summary of the Invention

[0006] The purpose of at least one specific embodiment of the present invention is to address the defects of the prior art and to provide a saw blade quick clamping structure and a reciprocating saw.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0008] A saw blade quick clamping structure, comprising:

[0009] Inner race of chuck;

[0010] A first positioning member and a second positioning member, both of which are mounted on the inner ring of the chuck;

[0011] The outer ring of the chuck is sleeved on the outer side of the inner ring of the chuck and is connected to an elastic reset member on one side;

[0012] The outer ring of the collet is configured as:

[0013] When the outer ring of the chuck is in a first rotational position relative to the inner ring of the chuck, the inner wall surface thereof can press the first positioning member and / or the second positioning member, so that a clamping force is formed between the first positioning member and the second positioning member to clamp and fix the saw blade body;

[0014] When the outer ring of the chuck is in the second rotation position relative to the inner ring of the chuck, the squeezing force of the inner wall of the chuck on the first positioning member and / or the second positioning member disappears, and the clamping force of the first positioning member and the second positioning member on the saw blade body is released;

[0015] The power required for the outer ring of the chuck to be transformed from the second rotational position to the first rotational position is provided by the deformed elastic reset member;

[0016] The saw blade quick clamping structure also includes a locking member that is circumferentially limited. The locking member can approach the outer ring of the chuck under the action of elastic force, so that the outer ring of the chuck is circumferentially locked and maintained in the second rotational position, and the elastic reset member is in an energy storage state;

[0017] When the saw blade body is inserted into the inner ring of the chuck, it is suitable for triggering the locking member to separate the locking member from the outer ring of the chuck, and the elastic reset member drives the outer ring of the chuck to switch to the first rotation position, and the first positioning member and the second positioning member clamp and fix the saw blade body.

[0018] Furthermore, when the outer ring of the chuck is converted from the first rotation position to the second rotation position under the drive of external force, the clamping force of the first positioning member and the second positioning member on the saw blade body is released, and the locking member, under the action of elastic force, pushes the saw blade body out of the clamping space between the first positioning member and the second positioning member, and locks the outer ring of the chuck in the second rotation position.

[0019] Furthermore, the saw blade quick clamping structure also includes a slide rod body, the inner ring of the chuck is sleeved on the outer side of the slide rod body, one end of the slide rod body is provided with a clamping opening, and the surface of the slide rod body is provided with a first mounting hole and a second mounting hole connected to the clamping opening;

[0020] One end of the first positioning member passes through the first mounting hole and extends into the clamping opening, and one end of the second positioning member passes through the second mounting hole and extends into the clamping opening. After installation, the first positioning member and the second positioning member maintain the circumferential position of the inner ring of the chuck and the slide rod body relative to each other;

[0021] When the saw blade body is installed, one end thereof extends into the clamping opening and is clamped and fixed by the first positioning member and the second positioning member.

[0022] Furthermore, at least one arc-shaped groove corresponding to the first positioning member is provided on the inner wall surface of the outer ring of the chuck. When the outer ring of the chuck is converted from the second rotation position to the first rotation position, the arc-shaped groove rotates relative to the first positioning member, and its wall surface gradually squeezes the first positioning member, so that the end of the first positioning member is close to the second positioning member, thereby forming a clamping force.

[0023] Furthermore, the relative rotation trajectory between the arc-shaped slot and the first positioning member is an Archimedean spiral.

[0024] Furthermore, a sheath is installed on the slide rod body, an elastic member is installed on the sheath, one end of the elastic member is connected to the locking member, and a locking groove corresponding to the locking member is provided on the outer ring of the chuck;

[0025] The locking element is configured as follows:

[0026] When the saw blade body is inserted into the clamping opening, it triggers the locking member so that the locking member is separated from the locking groove, and the elastic reset member drives the outer ring of the chuck to switch to the first rotation position, the locking groove and the locking member are staggered, and the first positioning member and the second positioning member clamp and fix the saw blade body;

[0027] Driven by external force, when the outer ring of the chuck is converted from the first rotation position to the second rotation position, the locking groove corresponds to the locking member, and the clamping force of the first positioning member and the second positioning member on the saw blade body is released. Under the elastic force of the elastic member, the locking member pushes the saw blade body out of the clamping space between the first positioning member and the second positioning member, and the locking member extends into the locking groove and matches the locking groove, and locks the outer ring of the chuck in the second rotation position.

[0028] Furthermore, the elastic reset member is a torsion spring, one end of which is connected to the sheath and the other end is connected to the outer ring of the chuck.

[0029] Furthermore, a limiting rod is provided on the sheath, and the limiting rod passes through the clamping opening. The sheath is circumferentially limited on the sliding rod body through the cooperation between the limiting rod and the clamping opening.

[0030] Furthermore, an end of the first positioning member close to the second positioning member is a tapered end.

[0031] Furthermore, a limiting groove is provided on the slide rod body, and the locking member passes through the limiting groove. The limiting groove is configured to allow the locking member to move in the direction of approaching and away from the outer ring of the chuck, while limiting the rotation of the locking member in the circumferential direction.

[0032] Another saw blade quick clamp structure provided by the present application includes:

[0033] Inner race of chuck;

[0034] The outer ring of the chuck has a locking groove on its circumference, is sleeved on the outer side of the inner ring of the chuck, and is connected to an elastic reset member;

[0035] The slide bar body is provided with a clamping opening for clamping the saw blade and a limiting groove running through it;

[0036] a locking member, which is inserted into the limiting groove;

[0037] an elastic member connected to the locking member and applying an elastic force toward the outer ring of the chuck;

[0038] Its characteristics are:

[0039] When the saw blade is not installed, the locking member maintains a limited fit with the locking groove under the action of elastic force, the outer ring of the chuck is locked in the second rotation position, and the elastic reset member is in an energy storage state;

[0040] When the saw blade is inserted into the clamping opening, the end of the saw blade pushes the locking member to compress the elastic member and disengage from the locking groove, thereby releasing the lock of the outer ring of the chuck. The outer ring of the chuck automatically rotates to the first rotation position under the resetting action of the elastic resetting member to squeeze the positioning member to clamp the saw blade;

[0041] When external force drives the outer ring of the chuck to rotate from the first rotation position to the second rotation position, the locking groove is aligned with the locking member, and the elastic member drives the locking member to move and bounce into the locking groove, so that the locking member pushes the saw blade, pops the saw blade out of the clamping port, and locks the outer ring of the chuck in the second rotation position.

[0042] Furthermore, the limiting groove is configured as follows:

[0043] allowing the locking member to move axially along the slide rod body;

[0044] The locking member is prohibited from circumferential rotation.

[0045] Further, when the outer ring of the chuck rotates to the second rotation position, the central axis of the locking groove is parallel to or coincides with the locking member;

[0046] When the outer ring of the chuck rotates to the first rotation position, the axis of the locking groove is offset from the locking member, and the arc-shaped groove configured on the inner wall surface of the outer ring of the chuck squeezes the positioning member.

[0047] The saw blade quick clamp structure provided by the present application has the following beneficial technical effects compared with the prior art:

[0048] 1. The present application can realize the one-handed quick disassembly and assembly of the saw blade. Through the linkage design of the locking part and the saw blade insertion, the insertion of the saw blade automatically triggers clamping (the locking part is triggered to release the outer ring of the chuck, and the elastic reset part drives the reset), and the saw blade is automatically ejected during disassembly (external force rotates the outer ring of the chuck to the second position, the locking part pushes out the saw blade and locks the mechanism). The entire process does not require auxiliary tools or two-handed collaborative operation.

[0049] 2. The quick-clamping structure of the present application is self-locking and prevents resetting when in the loosened state. When the clamping force of the saw blade is released, the locking part locks the outer ring of the chuck circumferentially in the second rotation position under the action of elastic force, ensuring that the mechanism remains stably in the loosened state during the saw blade replacement process, completely solving the operational burden of the prior art that requires continuous force to maintain loosening and the risk of accidental resetting.

[0050] 3. When the outer ring of the chuck rotates to the second position, the locking part automatically pushes the saw blade out of the clamping space, avoiding the difficulty of manually pulling out the saw blade in the traditional solution and reducing the workload.

[0051] Another technical solution adopted in the present application is to provide a reciprocating saw including the above-mentioned saw blade quick clamping structure.

[0052] The reciprocating saw provided in the present application has the technical effects of the above-mentioned saw blade quick-clamping structure because it is equipped with the above-mentioned saw blade quick-clamping structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0054] Figure 1 This is a structural schematic diagram of the saw blade quick clamping structure when the outer ring of the chuck of this application is in the second rotation position.

[0055] Figure 2 This is a structural schematic diagram of the saw blade quick clamping structure when the outer ring of the chuck of this application is in the first rotation position.

[0056] Figure 3 This is an exploded schematic diagram of the saw blade quick clamp structure of this application.

[0057] Figure 4 This is a schematic diagram of the assembly of the sheath and the sliding rod body of this application.

[0058] Figure 5 for Figure 1 Schematic diagram of the transverse section.

[0059] Figure 6 for Figure 1 Schematic diagram of the longitudinal section.

[0060] Figure 7 for Figure 2 Schematic diagram of the transverse section.

[0061] Figure 8 for Figure 2 Schematic diagram of the longitudinal section.

[0062] Figure 9 This is a schematic diagram of the structure of the outer ring of the chuck of this application.

[0063] Figure 10 This is a schematic cross-sectional view of the outer ring of the chuck of this application.

[0064] Figure 11 This is a transverse cross-sectional diagram of the saw blade quick clamp structure of the present application when the saw blade is initially inserted into the clamping opening.

[0065] Figure 12 This is a transverse cross-sectional view of the saw blade quick clamp structure of the present invention when the saw blade is fully inserted into the clamping opening.

[0066] Figure 13 This is a longitudinal cross-sectional view of the saw blade quick clamp structure of the present application when the saw blade is fully inserted into the clamping opening. DETAILED DESCRIPTION

[0067] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0068] Reference Figures 1 to 4 A saw blade quick clamping structure 100 includes a chuck inner ring 10, a first positioning member 101 and a second positioning member 102 installed on the chuck inner ring 10, a chuck outer ring 20 sleeved on the outside of the chuck inner ring 10, an elastic reset member 30 connected to the chuck outer ring 20, and a slide rod body 40 passing through the inner side of the chuck inner ring 10, wherein a clamping opening 401 is provided at one end of the slide rod body 40, and the clamping opening 401 extends in the length direction of the slide rod body 40, and a first mounting hole 402 and a second mounting hole 403 connected to the clamping opening 401 are provided on the surface of the slide rod body 40.

[0069] Reference Figures 5 to 8 One end of the first positioning member 101 passes through the first mounting hole 402 and extends into the clamping opening 401, and one end of the second positioning member 102 passes through the second mounting hole 403 and extends into the clamping opening 401. After installation, the first positioning member 101 and the second positioning member 102 keep the inner ring 10 of the chuck and the slide rod body 40 circumferentially limited to each other, and the inner ring 10 of the chuck after installation will not rotate relative to the slide rod body 40.

[0070] It should be noted that, since the ends of the first positioning member 101 and the second positioning member 102 extend into the clamping opening 401 to clamp and fix the saw blade 200, when the tail ends of the first positioning member 101 and the second positioning member 102 are squeezed, the head ends of the two may move closer to each other to form a clamping force. The present application squeezes the tail ends of the first positioning member 101 and / or the second positioning member 102 through the inner wall of the rotating chuck outer ring 20, so that the head ends of the first positioning member 101 and the second positioning member 102 clamp and fix the saw blade 400 extended into the clamping opening 401.

[0071] Reference Figure 9 , Figure 10, a sheath 50 is installed on the slide rod body 40, and a limiting rod 501 is passed through the sheath 50. When the sheath 50 is installed on the slide rod body 40, the sheath 50 is sleeved from the end of the slide rod body 40, and the limiting rod 501 passes through the clamping port 401. The sheath 50 is slid until the limiting rod 501 slides to the end of the clamping port 401. The sheath 50 is circumferentially limited on the slide rod body 40 through the cooperation between the limiting rod 501 and the clamping port 401. At least two elastic members 60 are installed on the sheath 50, and one end of the elastic member 60 is connected to the locking member 70. The outer ring 20 of the chuck is provided with a locking groove 201 corresponding to the locking member 70;

[0072] In addition, a penetrating limit groove 404 is provided on the slide rod body 40, and the limit groove 404 extends in the length direction of the slide rod body 40. When the locking member 70 is installed, it penetrates the limit groove 404. The limit groove is configured to allow the locking member 70 to move in the direction of approaching and away from the outer ring 20 of the chuck, while limiting the rotation of the locking member 70 in the circumferential direction.

[0073] In this embodiment, the elastic member 60 can be specifically implemented as a spring, and the locking member 70 can be specifically implemented as a rod. The locking groove 201 is two mutually opposing U-shaped grooves arranged on the outer ring 20 of the chuck. Under the elastic force of the elastic member 60, the locking member 70 will approach the outer ring 20 of the chuck. When its two ends are consistent with the locking groove 201, the locking member 70 limits the circumferential position of the outer ring 20 of the chuck. When the locking member 70 is touched and the elastic member 60 is squeezed, the locking member 70 is separated from the locking groove 201 and moves away from the outer ring 20 of the chuck, and the circumferential limit of the outer ring 20 of the chuck by the locking member 70 is released.

[0074] In this embodiment, the elastic return member 30 can specifically be a torsion spring. When the elastic return member 30 is installed, it is sleeved on the outside of the slide rod body 40, one end is connected to the sheath 50, and the other end is connected to the chuck outer ring 20. When the chuck outer ring 20 rotates in one direction, the deformed elastic return member 30 can drive the chuck outer ring 20 to rotate in the opposite direction and reset.

[0075] In order to realize the linkage control between the outer ring 20 of the chuck and the first positioning member 101 and the second positioning member 102, a first arc groove 20a corresponding to the first positioning member 101 and a second arc groove 20b corresponding to the second positioning member 102 are provided on the inner wall surface of the outer ring 20 of the chuck. A clamping space is formed between the ends of the first positioning member 101 and the second positioning member 102. The end of the first positioning member 101 close to the first arc groove 20a is set as the tail end 101a, and the end away from the first arc groove 20a is set as the head end 101b. The end of the second positioning member 102 close to the second arc groove 20b is set The tail end 102a is the tail end 102a, and the end away from the second arc groove 20b is the head end 102b. When the saw blade 200 is installed, its end extends into the clamping port 401 of the slide rod body 40. When the outer ring 20 of the chuck rotates, the inner wall of the first arc groove 20a will gradually squeeze the tail end 101a of the first positioning member 101, and the inner wall of the second arc groove 20b will gradually squeeze the tail end 102a of the second positioning member 102, thereby causing the first positioning member 101 and the second positioning member 102 to move relative to each other, and the head end 101b and the head end 102b move closer to each other to form a clamping force on the saw blade 200.

[0076] Specifically, in this embodiment, the first positioning member 101 is implemented as a clamping pin, which mainly plays the role of clamping and fixing the saw blade 200. The head end 101b of the first positioning member 101 is truncated cone-shaped. The second positioning member 102 is implemented as a positioning pin, which mainly plays the role of stably supporting the saw blade 200. When the outer ring 20 of the chuck rotates, the relative rotation trajectory of the first arc groove 20a and the first positioning member 101 is an Archimedean spiral, and the second arc groove 20b is set as an ordinary arc groove. Therefore, in this embodiment, the first positioning member 101 is in a movable installation state in the first mounting hole 402, and the installation state of the second positioning member 102 in the second mounting hole 403 is not limited. It can be installed movably or fixedly. According to the design of the second arc-shaped groove 20b, in this embodiment, the second positioning member 102 is implemented as a positioning pin, which mainly plays the role of positioning support when clamping the saw blade 200. The action of pressing and fixing the saw blade 200 is mainly completed by the first positioning member 101. Specifically, when the outer ring 20 of the chuck rotates, the inner wall of the first arc-shaped groove 20a will gradually squeeze the tail end 101a of the first positioning member 101, so that the first positioning member 101 moves closer to the second positioning member 102, and the inner wall of the second arc-shaped groove 20b will always support the tail end 102a of the second positioning member 102, so that the second positioning member 102 is in a stable support state.

[0077] Reference Figure 11 , Figure 12 , Figure 13After the various components of the saw blade quick clamping structure 100 are installed, the sheath 50 is sleeved on the slide rod body 40 and is circumferentially limited by the limit rod 501. The inner ring 10 of the chuck is sleeved on the outside of the slide rod body 40. After the first positioning member 101 and the second positioning member 102 are plugged into place, the inner ring 10 of the chuck is also circumferentially limited on the slide rod body 40. The outer ring 20 of the chuck is sleeved on the outside of the inner ring 10 of the chuck. The elastic reset member 30 is connected between the outer ring 20 of the chuck and the sheath 50, and the locking member 70 is passed through the limiting groove of the slide rod body 40.

[0078] When the saw blade 200 is disassembled or not installed, under the elastic force of the elastic member 60, the locking member 70 approaches the chuck outer ring 20 and extends into the locking groove 201 of the chuck outer ring 20. Since the locking member 70 itself cannot rotate, the locked chuck outer ring 20 cannot rotate either. At this time, the chuck outer ring 20 is in the second rotation position. It should be noted that in order for the chuck outer ring 20 to reach the second rotation position, an external force is required to drive the chuck outer ring 20 to rotate. When the chuck outer ring 20 rotates to the second rotation position, the position of the locking groove 201 thereon corresponds to the position of the locking member 70. The locking member 70 can only smoothly match the locking groove 201 under the elastic force of the elastic member 60. After the chuck outer ring 20 is circumferentially locked at the second rotation position, the elastic reset member 30 connected thereto is in a deformation energy storage state. At this time, the inner wall of the first arc groove 20a is aligned with the first positioning member 1 01, the outer ring 20 of the chuck will not squeeze the first positioning member 101, that is, when the outer ring 20 of the chuck is rotated to the second rotation position, there will be no clamping force between the first positioning member 101 and the second positioning member 102, and the first positioning member 101 is in a free movable state in the first mounting hole 402. In this embodiment, after the saw blade 200 is disassembled or when the saw blade 200 is not installed, the outer ring 20 of the chuck is always in the second rotation position and the elastic reset member 30 is in a deformation energy storage state.

[0079] In some embodiments, a spring can be installed in the first mounting hole 402, and the spring is sleeved on the outside of the first positioning member 101. When the outer ring 20 of the chuck rotates to the second rotation position, there is a gap between the inner wall of the first arc-shaped groove 20a and the tail end 101a of the first positioning member 101. The spring can keep the first positioning member 101 in a retracted state, so that a gap is formed between the head end 101b of the first positioning member 101 and the head end 102b of the second positioning member 102, so that there is no clamping force between the first positioning member 101 and the second positioning member 102.

[0080] When the saw blade 200 needs to be installed, one end of the saw blade 200 is inserted into the clamping opening 401, and its end first contacts the head end 101b of the first positioning member 101. Since the peripheral surface of the head end 101b is a conical surface, when the end of the saw blade 200 pushes the head end 101b of the first positioning member 101, the first positioning member 101 will retract in the first mounting hole 402. At this time, the end of the saw blade 200 will pass through the gap between the first positioning member 101 and the second positioning member 102, and further push the locking member 70. After the locking member 70 is pushed by the saw blade 200, it will compress the elastic member 60 and move in the limiting groove 404. The moving locking member 70 is separated from the locking groove 201 on the outer ring 20 of the chuck. At this time, the peripheral surface of the outer ring 20 of the chuck is The limit state is released, and the elastic reset member 30 in the deformation energy storage state is reset, and drives the outer ring 20 of the chuck to rotate. During the rotation of the outer ring 20 of the chuck, the relative rotation trajectory of the first arc groove 20a and the first positioning member 101 is an Archimedean spiral. The first arc groove 20a on the inner wall of the outer ring 20 of the chuck will gradually approach the tail end 101a of the first positioning member 101 and gradually apply an extrusion force to the tail end 101a, so that the head end 101b of the first positioning member 10 is close to the head end 102b of the second positioning member 102, and the first positioning member 101 and the second positioning member 102 form a relative clamping force, thereby clamping and fixing the saw blade 200. At this time, the outer ring 20 of the chuck is in the first rotation position, and the saw blade 200 is installed. It should be noted that when the outer ring 20 of the chuck is in the first rotation position, the position of the locking groove 201 is relatively staggered with the position of the locking member 70. When the elastic member 60 is reset, the locking member 70 will be close to one side of the outer ring 20 of the chuck, but it cannot lock the outer ring 20 of the chuck. At this time, the outer ring 20 of the chuck is in a rotatable state (driven by external force).

[0081] After the saw blade 200 is installed, when the saw blade 200 needs to be removed, the person needs to manually rotate the chuck outer ring 20 (rotate from the first rotation position to the second rotation position). When the chuck outer ring 20 reaches the second rotation position, the position of the locking groove 201 thereon corresponds to the position of the locking member 70. The locking member 70 is elastically inserted into the locking groove 201 under the elastic force of the elastic member 60 and fits therewith. After the locking member 70 is elastically inserted into the locking groove 201, the chuck outer ring 20 can be limited and locked, so that the chuck outer ring 20 can be smoothly maintained in the second rotation position (the first positioning member at this time) without the action of external force. 101 and the second positioning member 102 will not have a clamping force), and at the same time, when the locking member 70 bounces into the locking groove 201, the locking member 70 will apply a large and short ejection force to the end of the saw blade 200, and the locking member 70 that quickly bounces into the locking groove 201 will eject the saw blade 200 from the space between the first positioning member 101 and the second positioning member 102. That is to say, when the outer ring 20 of the chuck rotates to the second position, the locking member 70 will synchronously and automatically eject the saw blade 200 from the clamping space, avoiding the operational difficulty of manually pulling out the saw blade in the traditional solution and reducing the operating intensity.

[0082] When installing the saw blade 200 of the present application, a person can complete the installation by inserting the saw blade 200 into the holding opening 401 with one hand. When the saw blade needs to be disassembled, a person can rotate the outer ring 20 of the chuck with one hand, and the saw blade 200 can be automatically popped out. The person can pull out the saw blade 200 with one hand. This mechanism can realize the one-handed quick disassembly and assembly of the saw blade 200. Through the linkage design of the locking member 70 and the insertion of the saw blade, the insertion of the saw blade 200 automatically triggers clamping (the locking member 70 is triggered to release the outer ring 20 of the chuck, and the elastic reset member 30 drives the reset). The saw blade 200 is automatically popped out when disassembling (external force rotates the outer ring of the chuck 20 to the second position, and the locking member pushes out the saw blade and locks the mechanism). No auxiliary tools or two-handed collaborative operation are required throughout the process.

[0083] Moreover, the quick-clamping structure 100 is self-locking and prevents resetting when in the loosened state. When the clamping force of the saw blade 200 is released, the locking member 70 circumferentially locks the outer ring 20 of the chuck in the second rotational position under the action of elastic force, ensuring that the mechanism stably maintains the loosened state during the replacement of the saw blade 200, completely solving the operational burden of the prior art that requires continuous force to maintain loosening and the risk of accidental resetting.

[0084] Example 2

[0085] Based on the same technical concept, an embodiment of the present application provides a reciprocating saw, which includes a motor, a transmission device connected to the motor, and the saw blade quick-clamping structure 100 in the above embodiment. The motor drives the sliding rod body 40 of the saw blade quick-clamping structure 100 through the transmission device to perform linear reciprocating motion.

[0086] In a preferred embodiment, the reciprocating saw is a DC electric reciprocating saw.

[0087] After the saw blade quick clamping structure 100 is installed on the reciprocating saw, the saw blade can be quickly disassembled and assembled with one hand, and the quick clamping structure is self-locking and prevented from resetting when in the released state.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A saw blade quick clamping structure, comprising: Inner race of chuck; A first positioning member and a second positioning member, both of which are installed on the inner ring of the chuck; The outer ring of the chuck is sleeved on the outer side of the inner ring of the chuck and is connected to an elastic reset member; The collet outer ring is configured as: When the outer ring of the chuck is in a first rotational position relative to the inner ring of the chuck, the inner wall surface thereof can press the first positioning member and / or the second positioning member, so that a clamping force is formed between the first positioning member and the second positioning member to clamp and fix the saw blade body; When the outer ring of the chuck is in the second rotational position relative to the inner ring of the chuck, the squeezing force of the inner wall thereof on the first positioning member and / or the second positioning member disappears, and the clamping force of the first positioning member and the second positioning member on the saw blade body is released; The power required for the outer ring of the chuck to be transformed from the second rotational position to the first rotational position is provided by the deformed elastic reset member; The invention is characterized in that it further comprises a circumferentially limited locking member, wherein the locking member can approach the outer ring of the chuck under the action of elastic force, so that the outer ring of the chuck is circumferentially locked and maintained in the second rotational position, and the elastic return member is in an energy storage state; When the saw blade body is inserted into the inner ring of the chuck, it is suitable for triggering the locking member to separate the locking member from the outer ring of the chuck, and the elastic reset member drives the outer ring of the chuck to switch to the first rotation position, and the first positioning member and the second positioning member clamp and fix the saw blade body.

2. The saw blade quick clamp structure according to claim 1, characterized in that: Driven by external force, when the outer ring of the chuck is converted from the first rotation position to the second rotation position, the clamping force of the first positioning member and the second positioning member on the saw blade body is released, and the locking member, under the action of elastic force, pushes the saw blade body out of the clamping space between the first positioning member and the second positioning member, and locks the outer ring of the chuck in the second rotation position.

3. The saw blade quick clamp structure according to claim 1, characterized in that: The slide rod body is also provided, wherein the inner ring of the chuck is sleeved on the outer side of the slide rod body, a clamping opening is provided at one end of the slide rod body, and a first mounting hole and a second mounting hole are provided on the surface of the slide rod body and communicate with the clamping opening; One end of the first positioning member passes through the first mounting hole and extends into the clamping opening, and one end of the second positioning member passes through the second mounting hole and extends into the clamping opening. After installation, the first positioning member and the second positioning member maintain the circumferential position of the chuck inner ring and the slide rod body relative to each other; When the saw blade body is installed, one end thereof extends into the clamping opening and is clamped and fixed by the first positioning member and the second positioning member.

4. The saw blade quick clamp structure according to claim 1, characterized in that: At least one arc-shaped groove corresponding to the first positioning member is provided on the inner wall surface of the outer ring of the chuck. When the outer ring of the chuck is converted from the second rotation position to the first rotation position, the arc-shaped groove rotates relative to the first positioning member, and its wall surface gradually squeezes the first positioning member, so that the end of the first positioning member is close to the second positioning member, thereby forming the clamping force.

5. The saw blade quick clamping structure according to claim 4, characterized in that: The relative rotation trajectory of the arc-shaped groove and the first positioning member is an Archimedean spiral.

6. The saw blade quick clamping structure according to claim 3, characterized in that: A sheath is installed on the slide rod body, an elastic member is installed on the sheath, one end of the elastic member is connected to the locking member, and a locking groove corresponding to the locking member is provided on the outer ring of the chuck; The locking member is configured as follows: When the saw blade body is inserted into the clamping opening, it actuates the locking member so that the locking member is separated from the locking groove, and the elastic reset member drives the outer ring of the chuck to switch to the first rotation position, the locking groove and the locking member are staggered, and the first positioning member and the second positioning member clamp and fix the saw blade body; Driven by external force, when the outer ring of the chuck is converted from the first rotation position to the second rotation position, the locking groove corresponds to the locking member, and the clamping force of the first positioning member and the second positioning member on the saw blade body is released. Under the elastic force of the elastic member, the locking member pushes the saw blade body out of the clamping space between the first positioning member and the second positioning member, and the locking member extends into the locking groove and matches the locking groove, and locks the outer ring of the chuck in the second rotation position.

7. The saw blade quick clamping structure according to claim 6, characterized in that: The elastic reset member is a torsion spring, one end of which is connected to the sheath and the other end of which is connected to the outer ring of the chuck.

8. The saw blade quick clamping structure according to claim 6, characterized in that: A limiting rod is provided on the sheath, and the limiting rod passes through the clamping opening. The sheath is circumferentially limited on the sliding rod body through the cooperation between the limiting rod and the clamping opening.

9. The saw blade quick clamp structure according to claim 1, characterized in that: One end of the first positioning member close to the second positioning member is a tapered end.

10. The saw blade quick clamp structure according to claim 3, characterized in that: The slide rod body is provided with a penetrating limit groove, and the locking member passes through the limit groove. The limit groove is configured to allow the locking member to move in a direction close to and away from the outer ring of the chuck while limiting the rotation of the locking member in the circumferential direction.

11. A saw blade quick clamping structure, comprising: Inner race of chuck; The outer ring of the chuck has a locking groove on its circumference, is sleeved on the outer side of the inner ring of the chuck, and is connected to an elastic reset member; The slide bar body is provided with a clamping opening for clamping the saw blade and a limiting groove running through it; a locking member, which is inserted into the limiting groove; an elastic member connected to the locking member and applying an elastic force toward the outer ring of the chuck; Its characteristics are: When the saw blade is not installed, the locking member maintains a limited fit with the locking groove under the action of elastic force, the outer ring of the chuck is locked in the second rotation position, and the elastic reset member is in an energy storage state; When the saw blade is inserted into the clamping opening, the end of the saw blade pushes the locking member to compress the elastic member and disengage from the locking groove, thereby releasing the lock of the outer ring of the chuck. The outer ring of the chuck automatically rotates to the first rotation position under the resetting action of the elastic resetting member to squeeze the positioning member to clamp the saw blade; When external force drives the outer ring of the chuck to rotate from the first rotation position to the second rotation position, the locking groove is aligned with the locking member, and the elastic member drives the locking member to move and bounce into the locking groove, so that the locking member pushes the saw blade, pops the saw blade out of the clamping port, and locks the outer ring of the chuck in the second rotation position.

12. The saw blade quick clamp structure according to claim 11, characterized in that: The limiting slot is configured as follows: allowing the locking member to move axially along the slide rod body; The locking member is prohibited from circumferential rotation.

13. The saw blade quick clamp structure according to claim 11, characterized in that: When the outer ring of the chuck rotates to the second rotation position, the central axis of the locking groove is parallel to or coincides with the locking member; When the outer ring of the chuck rotates to the first rotation position, the axis of the locking groove is offset from the locking member, and the arc-shaped groove configured on the inner wall surface of the outer ring of the chuck squeezes the positioning member.

14. A reciprocating saw, characterized in that: The saw blade quick clamping structure comprises the saw blade quick clamping structure according to any one of claims 1 to 13.

Images