jigsaw and its blade adjustment mechanism

Abstract

This application relates to the field of woodworking tool technology, specifically to a jigsaw and its blade adjustment mechanism. The blade adjustment mechanism includes a blade shaft, an adjusting shaft, a limiting sleeve, a limiting knob, a connecting sleeve, an adjusting knob, and a handle. The jigsaw and its blade adjustment mechanism disclosed in this application not only allow for quick and efficient adjustment of the saw blade tension, but also enable flexible real-time adjustment of the saw blade's cutting edge orientation in applications processing complex products, thereby improving the applicability and cost-effectiveness of the woodworking saw.

Description

Technical Field

[0001] This application relates to the field of woodworking tool technology, specifically to a jigsaw and its blade adjustment mechanism. Background Technology

[0002] Once the saw blade on a current woodworking saw is fixed, the tension and orientation of the blade are relatively difficult to adjust during processing. Figure 11 When using the curve structure shown, both efficiency and accuracy need to be improved. Summary of the Invention

[0003] In view of this, this application provides a jigsaw and its blade adjustment mechanism to solve all or part of the technical problems described in the background section of this application.

[0004] The jigsaw blade adjustment mechanism provided in this application to solve its technical problem is as follows:

[0005] A jigsaw blade adjustment mechanism, characterized in that it includes a saw blade shaft, an adjusting shaft, and a limiting sleeve; both ends of the saw blade shaft are respectively provided with a saw blade mounting part, a rotation limiting part, and a threaded mating part; the saw blade mounting part is used to mount the saw blade, the rotation limiting part is used to limit the rotation of the saw blade shaft, and the threaded mating part is used to threadedly connect to the adjusting shaft; one end of the adjusting shaft used to connect to the threaded mating part is provided with a threaded transmission part; the limiting sleeve is provided with a rotation limiting hole and an adjusting shaft hole, and the rotation limiting hole and the adjusting shaft hole are connected; the rotation limiting part is disposed in the rotation limiting hole, and the threaded transmission part extends into the adjusting shaft hole and is threadedly connected to the threaded mating part.

[0006] When the limiting sleeve is fixed, rotating the adjusting shaft can push the saw blade shaft forward or backward through the threaded transmission between the threaded mating part and the threaded transmission part to loosen or tighten the saw blade assembled on the saw blade mounting part.

[0007] When the limiting sleeve is not fixed, rotating the adjusting shaft allows the saw blade shaft to rotate together with the adjusting shaft to adjust the orientation of the saw blade mounted on the saw blade mounting part.

[0008] Preferably, the jigsaw blade adjustment mechanism further includes a limiting shaft with a limiting head on it; a limiting sleeve with several limiting grooves; when the limiting head is inserted into the limiting groove, the rotation of the limiting sleeve is restricted; when the limiting head is removed from the limiting groove, the rotation of the limiting sleeve is allowed.

[0009] Preferably, the jigsaw blade adjustment mechanism also includes a limiting knob, with one end of the limiting shaft connected to the limiting knob and the other end of the limiting shaft provided with a limiting head.

[0010] Preferably, the saw blade mounting part includes a saw blade receiving hole and a saw blade locking hole, the saw blade locking hole being opened on the side of the saw blade receiving hole and extending through the saw blade receiving hole; or, the saw blade mounting part includes a saw blade receiving groove and a saw blade connecting groove, the saw blade receiving groove and the saw blade connecting groove being arranged crosswise, forming a saw blade hanger at the end position.

[0011] The two saw blade mounting options correspond to the most commonly used saw blade types in practice. The first type involves inserting the end of the saw blade into the saw blade receiving hole, and then locking the saw blade using screws or other fasteners in conjunction with the saw blade locking hole. The second type involves inserting the end of the saw blade into the saw blade receiving groove, and then locking the saw blade by a shaft component passing through the saw blade connecting groove and the mounting hole on the saw blade. For saw blades with hooks at both ends, the saw blade can be installed directly by attaching the saw blade hooks to the saw blade hanger.

[0012] Preferably, the jigsaw blade adjustment mechanism further includes a connecting sleeve, which has a connecting part, a rotating cavity, and a limiting hole. The rotating cavity passes through the connecting sleeve, and the limiting hole connects to the rotating cavity. The limiting sleeve is disposed inside the rotating cavity, and the limiting shaft is assembled into the limiting hole, with the limiting groove corresponding to the limiting head. The saw blade shaft and the adjusting shaft are respectively assembled into the rotating cavity from both ends. The connecting part is used to assemble the connecting sleeve onto the saw frame.

[0013] Preferably, a positioning ring is also provided inside the rotating cavity to prevent the limiting sleeve from coming off from one end of the accommodating saw blade shaft.

[0014] Preferably, the jigsaw blade adjustment mechanism further includes an end cap, which has an end cap shaft hole through which the end cap passes; the end cap is mounted on a connecting sleeve at one end of the adjusting shaft; the adjusting shaft extends into the rotating cavity from the end cap shaft hole. Furthermore, the end cap is also provided with a bearing groove for accommodating a bearing.

[0015] Preferably, the jigsaw blade adjustment mechanism also includes an adjustment knob, which is fixedly connected to the adjustment shaft.

[0016] Preferably, the jigsaw blade adjustment mechanism also includes a bearing, which is mounted on the adjustment shaft to reduce friction when the adjustment knob is turned.

[0017] Preferably, the adjustment knob has an adjustment shaft mounting hole that connects to the handle screw hole; the adjustment shaft has a knob mounting part that fits into the adjustment shaft mounting hole to form a synchronous rotational connection, meaning that rotating the adjustment knob drives the adjustment shaft to rotate together. More preferably, the adjustment shaft mounting hole is an oblong hole, and the knob mounting part is an oblong shaft.

[0018] Preferably, the jigsaw blade adjustment mechanism further includes a clamping component, which includes a clamping cap and a clamping screw; the adjustment knob is provided with a handle screw hole, and the adjustment shaft mounting hole is connected to the handle screw hole; the adjustment shaft is provided with a fastening screw hole at one end relative to the threaded transmission part; the knob mounting part is mounted in the adjustment shaft mounting hole, and the clamping screw is mounted in the fastening screw hole and clamps the adjustment knob through the clamping cap.

[0019] Preferably, the jigsaw blade adjustment mechanism also includes a handle, which includes a handle portion and a threaded connection portion; the threaded connection portion is fitted into the screw hole of the handle by thread engagement.

[0020] Preferably, the limiting rotation part is a non-circular shaft structure with a limiting rotation surface; the limiting hole is a non-circular hole structure with a limiting rotation mating position; the limiting rotation part and the limiting rotation mating position cooperate with each other to achieve synchronous rotation of the limiting sleeve and the saw blade shaft, thereby enabling real-time adjustment of the orientation of the saw blade cutting edge.

[0021] Preferably, the rotation-limiting part is a polyhedral shaft, and the rotation-limiting hole is a polyhedral hole. The structure and size of the polyhedral shaft and the polyhedral hole match each other, and when they cooperate, they can limit the rotation of the saw blade shaft within the limiting sleeve, but allow the saw blade shaft to move in and out along the axial direction within the limiting sleeve, thereby tightening or loosening the saw blade.

[0022] Preferably, the threaded mating part is a threaded hole or a threaded post, and the threaded drive part is a threaded post or a threaded hole. The threaded hole and the threaded post cooperate to drive the saw blade shaft to extend and retract along the axial direction within the limiting sleeve via threaded drive, and can also drive the limiting sleeve and the saw blade shaft to rotate together via the adjusting shaft to adjust the orientation of the saw blade.

[0023] The jigsaw provided in this application to solve its technical problem is:

[0024] A jigsaw includes a saw frame and a saw blade, characterized in that: it further includes a first saw blade adjustment mechanism and a second saw blade adjustment mechanism; both the first saw blade adjustment mechanism and the second saw blade adjustment mechanism are disposed on the saw frame, and both ends of the saw blade are respectively disposed on the first saw blade adjustment mechanism and the second saw blade adjustment mechanism; the first saw blade adjustment mechanism and / or the second saw blade adjustment mechanism are the jigsaw saw blade adjustment mechanisms described in any of the foregoing technical solutions.

[0025] Preferably, the saw frame includes a crossbeam, a first vertical beam, and a second vertical beam; the first vertical beam and the second vertical beam are respectively fastened to both ends of the crossbeam.

[0026] Preferably, both the first and second vertical beams are provided with adjustment mechanism assembly parts at their ends. The adjustment mechanism assembly parts are used to assemble the jigsaw blade adjustment mechanism onto the saw frame in conjunction with the connecting parts on the connecting sleeve.

[0027] Preferably, the connecting part on the connecting sleeve includes a front upright plate and a rear upright plate, with an insert portion defined between the front and rear upright plates. The left and right sides of the front and rear upright plates are respectively provided with a left assembly hole and a right assembly hole. The adjusting mechanism assembly part includes an insert head, with a left mating hole and a right mating hole provided on the left and right sides of the insert head. The insert head is set in the insert portion of the connecting sleeve and is fastened to a whole by the cooperation of the left and right assembly holes on the connecting sleeve, the left and right mating holes on the saw frame, and fasteners such as screws and nuts.

[0028] Preferably, the insert head has a threaded limiting hole in its middle portion, which passes through the insert head and connects to a limiting hole on the connecting sleeve; the limiting shaft has an external thread and is threadedly fitted into the threaded limiting hole. Rotating the limiting shaft allows the limiting head to extend into or retract from the limiting groove on the limiting sleeve.

[0029] Beneficial technical effects:

[0030] The jigsaw and its blade adjustment mechanism disclosed in this application, through the cooperation between the saw blade shaft, adjusting shaft, limiting sleeve, and connecting sleeve, not only achieve quick and efficient adjustment of the saw blade tension, but also enable applications in processing more complex products, such as... Figure 10 In the application of the curved structure shown, the cutting edge orientation of the saw blade is flexibly adjusted in real time, thereby solving the technical problem defined in the background section of this application and improving the cost-effectiveness of existing woodworking saws.

[0031] The technical solution and technical effects of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0032] Figure 1 Schematic diagram of the three-dimensional structure of a jigsaw;

[0033] Figure 2 : Figure 1 First-person view of the exploded structure;

[0034] Figure 3 : Figure 1 Second-person exploded view of the structure;

[0035] Figure 4 : Figure 2 Schematic diagram of the structure of the saw blade shaft;

[0036] Figure 5 : Handle structure diagram;

[0037] Figure 6 : Schematic diagram of the limiting shaft and limiting knob structure;

[0038] Figure 7 Perspective view of the connecting sleeve structure;

[0039] Figure 8 : Schematic diagram of the three-dimensional structure of the connecting sleeve;

[0040] Figure 9 Adjustment mechanism assembly section structural diagram;

[0041] Figure 10 Schematic diagram of a modified saw blade shaft embodiment;

[0042] Figure 11 : Schematic diagram of the curve structure;

[0043] Icon description:

[0044] 10-Saw blade shaft, 20-Adjusting shaft, 30-Limiting sleeve, 40-Limiting shaft, 50-Limiting knob, 60-Connecting sleeve, 70-End cap, 80-Adjusting knob, 90-Clamping component, 100-Handle, 200-Bearing;

[0045] 110 - Saw blade mounting part, 120 - Rotation limiting part, 130 - Threaded mating part;

[0046] 1110-Saw blade receiving hole, 1120-Saw blade locking hole, 1130-Saw blade receiving groove, 1140-Saw blade connecting groove, 1150-Saw blade hanger;

[0047] 1210 - Restricted rotation surface;

[0048] 210 - Threaded drive part, 220 - Fastening screw hole, 230 - Knob assembly part;

[0049] 310 - Rotation limiting hole, 320 - Adjusting shaft hole, 330 - Limiting groove;

[0050] 3110 - Limited rotation coordination position;

[0051] 410 - Limiting head, 420 - External thread;

[0052] 610 - Connecting part, 620 - Rotating cavity, 630 - Limiting hole;

[0053] 6110 - Front upright plate, 6120 - Rear upright plate, 6130 - Embedded part, 6140 - Left mounting hole, 6150 - Right mounting hole;

[0054] 6210 - Locating ring, 6220 - Screw hole;

[0055] 710 - Bearing groove, 720 - End cap shaft hole;

[0056] 810 - Handle screw hole; 820 - Adjustment shaft mounting hole;

[0057] 910 - clamping cap, 920 - clamping screw;

[0058] 1010 - Handle part; 1020 - Threaded connection part;

[0059] 1-Saw frame, 2-Saw blade, 3-First saw blade adjustment mechanism, 4-Second saw blade adjustment mechanism;

[0060] 11-Horizontal beam, 12-First vertical beam, 13-Second vertical beam, 14-Adjustment mechanism assembly;

[0061] 141-Embedded head, 142-Left mating hole, 143-Right mating hole, 144-Thread limiting hole. Detailed Implementation

[0062] Please see Figures 1-10 The jigsaw blade adjustment mechanism disclosed in this application includes a blade shaft 10, an adjustment shaft 20, a limiting sleeve 30, a limiting shaft 40, a limiting knob 50, a connecting sleeve 60, an end cap 70, and an adjustment knob 80.

[0063] The saw blade shaft 10 has a saw blade mounting part 110, a rotation limiting part 120, and a threaded engagement part 130 at each end. The saw blade mounting part 110 is used to mount the saw blade, the rotation limiting part 120 is used to limit the rotation of the saw blade shaft 10, and the threaded engagement part 130 is used to thread the adjusting shaft 20.

[0064] The saw blade mounting section 110 can be configured in the following two ways for mounting the saw blade:

[0065] Please see Figure 10 The saw blade mounting part 110 includes a saw blade receiving hole 1110 and a saw blade locking hole 1120. The saw blade locking hole 1120 is formed on the side of the saw blade receiving hole 1110 and extends through the saw blade receiving hole 1110; or, please refer to Figure 4 The saw blade mounting part 110 includes a saw blade receiving groove 1130 and a saw blade connecting groove 1140. The saw blade receiving groove 1130 and the saw blade connecting groove 1140 are arranged crosswise, and a saw blade hanger 1150 is formed at the end position.

[0066] The two types of saw blade mounting parts 110 correspond to the most commonly used saw blades in practice. In the first structure, the end of the saw blade extends into the saw blade receiving hole 1110, and is then locked in place using screws or other fasteners in conjunction with the saw blade locking hole 1120. In the second structure, the end of the saw blade extends into the saw blade receiving groove 1130, and is locked in place by a shaft component passing through the saw blade connecting groove 1140 and the mounting hole on the saw blade. For saw blades with hooks at both ends, the saw blade can be installed directly onto the saw blade hanger 1150.

[0067] The adjusting shaft 20 has a threaded drive part 210 at one end for connecting to the threaded mating part 130. The threaded drive part 210 can be a threaded post or a threaded hole, and the threaded mating part 130 is a threaded hole or a threaded post that matches the structure of the threaded drive part 210. In this embodiment, the threaded mating part 130 is a threaded hole, and the threaded drive part 210 is a threaded post. The threaded drive part 210 and the threaded mating part 130 are connected by a threaded drive.

[0068] The limiting sleeve 30 is provided with a rotation limiting hole 310, an adjusting shaft hole 320, and a limiting groove 330, and the rotation limiting hole 310 and the adjusting shaft hole 320 are connected to each other. The rotation limiting hole 310 is used to cooperate with the rotating part 120 to achieve synchronous rotation of the limiting sleeve 20 and the saw blade shaft 10, the adjusting shaft hole 320 is used to accommodate the adjusting shaft 20, and the limiting groove 330 is used to cooperate with the limiting shaft 40 to lock the limiting sleeve 30.

[0069] The rotation-restricting part 120 is a non-circular shaft structure, and a rotation-restricting surface 1210 is provided on the non-circular shaft structure; the rotation-restricting hole 310 is a non-circular hole structure, and a rotation-restricting mating position 3110 is provided on the non-circular hole structure; the rotation-restricting surface 1210 and the rotation-restricting mating position 3110 cooperate with each other to realize the synchronous rotation of the limiting sleeve 20 and the saw blade shaft 10. In a variant embodiment, the rotation-restricting part 120 can also be a polyhedral shaft (prism shaft), and the rotation-restricting hole 310 can also be a polyhedral hole.

[0070] The rotation limiting part 120 of the saw blade shaft 10 is provided in the rotation limiting hole 310, and the threaded transmission part 210 of the adjusting shaft 20 extends into the adjusting shaft hole 320 and is threadedly connected to the threaded mating part 130 of the saw blade shaft 10.

[0071] When the limiting sleeve 30 is fixed, rotating the adjusting shaft 20 can drive the saw blade shaft 10 forward or backward through the threaded transmission between the threaded mating part 130 and the threaded transmission part 210, thereby loosening or tensioning the saw blade mounted on the saw blade mounting part 110.

[0072] When the limiting sleeve 30 is not fixed, rotating the adjusting shaft 20 allows the saw blade shaft 10 to rotate together with the adjusting shaft 20 to adjust the orientation of the saw blade mounted on the saw blade mounting part 110.

[0073] Please see Figure 6 The limiting shaft 40 is provided with a limiting head 410 and an external thread 420; one end of the limiting shaft 40 is connected to a limiting knob 50, and the other end is provided with the limiting head 410. The limiting knob 50 is used to operate the limiting shaft 40, and the limiting head 410 is used to cooperate with the limiting groove 330 on the limiting sleeve 30 to lock or release the limiting sleeve 30: when the limiting head 410 is inserted into the limiting groove 330, it restricts the rotation of the limiting sleeve 30; when the limiting head 410 is removed from the limiting groove 330, it allows the rotation of the limiting sleeve 30.

[0074] The connecting sleeve 60 is provided with a connecting part 610, a rotating cavity 620, and a limiting hole 630. The rotating cavity 620 passes through the connecting sleeve 60, and assembly holes for the saw blade shaft 10 and the adjusting shaft 20 are formed on both sides of the connecting sleeve 60; the limiting hole 630 is opened in a direction perpendicular to the axis of the rotating cavity 620 and communicates with the rotating cavity 620.

[0075] A limiting sleeve 30 is disposed within the rotating cavity 620, a limiting shaft 40 is fitted into the limiting hole 630, and a limiting groove 330 corresponds to the limiting head 410. The saw blade shaft 10 and the adjusting shaft 20 are respectively fitted into the rotating cavity 620 from both ends.

[0076] Please see Figure 7 The rotating cavity 620 is also provided with a positioning ring 6210, which is used to prevent the limiting sleeve 30 from coming off one end of the accommodating saw blade shaft 10.

[0077] The end cover 70 includes a bearing groove 710 and an end cover shaft hole 720, with the end cover shaft hole 720 penetrating through the end cover 70; the end cover 70 is assembled on the connecting sleeve 60 at one end of the adjusting shaft 20, and the adjusting shaft 20 extends into the rotating cavity 620 from the end cover shaft hole 720.

[0078] The limiting sleeve 30, which is assembled in the rotating cavity 620, can only rotate within the rotating cavity 620 under the action of the positioning ring 6210 and the end cap 70, and cannot make linear movements in the axial direction of the rotating cavity 620.

[0079] The connecting portion 610 on the connecting sleeve 60 is used to assemble the connecting sleeve 60 onto the saw frame. The connecting portion includes a front upright plate 6110 and a rear upright plate 6120, with an insert portion 6130 defined between the front upright plate 6110 and the rear upright plate 6120. A left mounting hole 6140 and a right mounting hole 6150 are respectively provided on the left and right sides of the front and rear upright plates. The insert portion 6130, the left mounting hole 6140, and the right mounting hole 6150 are used to cooperate with the corresponding structures on the saw frame to achieve the fixed assembly of the connecting sleeve 60 on the saw frame.

[0080] An adjustment knob 80 is fixedly connected to an adjustment shaft 20 and is used to operate the rotation of the adjustment shaft 20. The fixed connection between the adjustment knob 80 and the adjustment shaft 20 can be achieved using various existing connection methods, such as welding or integral molding. In this embodiment, the adjustment knob 80 includes a knob body, on which a handle screw hole 810 and an adjustment shaft mounting hole 820 are provided; the handle screw hole 810 is used to mount the handle 100, and the adjustment shaft mounting hole 820 is used to mount the adjustment shaft 20.

[0081] The adjustment shaft mounting hole 820 is a non-circular hole, such as an oblong hole or a polyhedral hole. The knob mounting part 230 on the adjustment shaft 20 has a mutually matching structure and size (such as an oblong shaft or a polyhedral shaft). The adjustment shaft 20 can be assembled into the adjustment shaft mounting hole 820 to form a fixed connection for synchronous rotation. That is, when the adjustment knob 80 is rotated, the adjustment shaft 20 can be driven to rotate together.

[0082] The jigsaw blade adjustment mechanism also includes a clamping component 90, which includes a clamping cap 910 and a clamping screw 920. The adjustment shaft mounting hole 820 on the adjustment knob 80 is connected to the handle screw hole 810. A fastening screw hole 220 is provided at one end of the adjustment shaft 20 relative to the threaded transmission part 210. The adjustment shaft 20 is mounted in the adjustment shaft mounting hole 820, and the clamping screw 920 is mounted in the fastening screw hole 220 and clamps the adjustment knob 80 through the clamping cap 910.

[0083] To reduce the friction when the adjustment knob 80 rotates, in a variation of this application, the jigsaw blade adjustment mechanism further includes a bearing 200, which is disposed on the adjustment shaft 20 and partially located in the bearing groove 710, to reduce the friction experienced by the adjustment knob 80 when it rotates.

[0084] In a modified embodiment of this application, the jigsaw blade adjustment mechanism further includes a handle 100, which includes a handle portion 1010 and a threaded connection portion 1020; the threaded connection portion 1020 is threadedly fitted into the handle screw hole 810 of the adjustment knob 80.

[0085] The jigsaw disclosed in this application, which employs a jigsaw blade adjustment mechanism, includes a saw frame 1 and a saw blade 2; it also includes a first saw blade adjustment mechanism 3 and a second saw blade adjustment mechanism 4; both the first saw blade adjustment mechanism 3 and the second saw blade adjustment mechanism 4 are mounted on the saw frame 1, and both ends of the saw blade 2 are respectively mounted on the first saw blade adjustment mechanism 3 and the second saw blade adjustment mechanism 4; at least one of the first saw blade adjustment mechanism 3 and the second saw blade adjustment mechanism 4 is the jigsaw blade adjustment mechanism disclosed in this application.

[0086] The saw frame 1 can be the saw frame of various woodworking saws in the prior art, or the connecting sleeve 60 of the jigsaw blade adjustment mechanism can be fixed to the saw frame 1 using various fixed connection methods in the prior art. The saw frame structure and connection method in this embodiment are as follows:

[0087] The saw frame 1 includes a crossbeam 11, a first vertical beam 12, and a second vertical beam 13; the first vertical beam 12 and the second vertical beam 13 are respectively fastened to both ends of the crossbeam 11. Each end of the first vertical beam 12 and the second vertical beam 13 is provided with an adjustment mechanism assembly part 14, which is used to assemble the jigsaw blade adjustment mechanism onto the saw frame 1 in conjunction with the connecting part 610 on the connecting sleeve 60.

[0088] The adjustment mechanism assembly part 14 includes an insert head 141. The insert head 141 has a left mating hole 142 and a right mating hole 143 on its left and right sides. The insert head 141 is set in the insert part 6130 on the connecting sleeve 60 and is fastened to a whole by the mating of the left and right assembly holes of the connecting sleeve 60, the left and right mating holes of the saw frame 1 and fasteners such as screws and nuts.

[0089] Please see Figure 9 The insert head 141 has a threaded limiting hole 144 in its middle portion. The threaded limiting hole 144 passes through the insert head 141 and connects to the limiting hole 630 on the connecting sleeve 60. The limiting shaft 40 is disposed in the threaded limiting hole 144 through a threaded engagement between the external thread 420 and the threaded limiting hole 144. Rotating the limiting shaft 40 allows the limiting head 410 to extend into or retract from the limiting groove 330 on the limiting sleeve 30.

[0090] Saw blade tension adjustment:

[0091] By rotating the limiting shaft 40 by the limiting knob 50, the limiting head 410 on the limiting shaft 40 enters the limiting groove 330 on the limiting sleeve 30. At this time, the limiting sleeve 30 is fixed and cannot rotate.

[0092] By adjusting the knob 80 to rotate the adjusting shaft 20, the saw blade shaft 10, which cannot rotate, can only move forward or backward in a straight line along the axis of the limiting sleeve 30 under the interaction of the threaded mating part 130 and the threaded transmission part 210, thereby tensioning or loosening the saw blade 2.

[0093] Adjusting the direction of the saw blade cutting edge:

[0094] By rotating the limiting shaft 40 by the limiting knob 50, the limiting head 410 on the limiting shaft 40 is disengaged from the limiting groove 330 on the limiting sleeve 30. At this time, the limiting sleeve 30 is not fixed and can rotate.

[0095] By adjusting knob 80 to rotate adjustment shaft 20, the saw blade shaft 10 can rotate, which in turn drives the saw blade 2 to rotate synchronously, thus achieving adjustment of the saw blade cutting edge orientation.

[0096] The jigsaw and its blade adjustment mechanism disclosed in this application, through the cooperation between the saw blade shaft, adjusting shaft, limiting sleeve, and connecting sleeve, not only achieve quick and efficient adjustment of the saw blade tension, but also enable applications in processing more complex products, such as... Figure 11 In the application of the curved structure shown, the cutting edge orientation of the saw blade is flexibly adjusted in real time, thereby solving the technical problem defined in the background section of this application and improving the cost-effectiveness of existing woodworking saws.

[0097] The technical solutions and effects of this application have been described in detail above with reference to the accompanying drawings and specific embodiments. It should be noted that those skilled in the art can develop other embodiments based on this. Any simple modifications and equivalent substitutions that do not depart from the innovative concept of this application are covered by this application and fall within the protection scope of this patent.

Claims

1. A jigsaw blade adjustment mechanism, characterized in that: Includes saw blade shaft (10), adjusting shaft (20), and limiting sleeve (30); The saw blade shaft (10) is provided with a saw blade mounting part (110), a rotation limiting part (120), and a threaded mating part (130) at both ends. The saw blade mounting part (110) is used to mount the saw blade, the rotation limiting part (120) is used to limit the rotation of the saw blade shaft (10), and the threaded mating part (130) is used to thread the adjusting shaft (20). The adjusting shaft (20) is provided with a threaded drive part (210) at one end for connecting the threaded mating part (130). The limiting sleeve (30) is provided with a rotation limiting hole (310) and an adjusting shaft hole (320), and the rotation limiting hole (310) and the adjusting shaft hole (320) are connected to each other; The rotation limiting part (120) is disposed in the rotation limiting hole (310), and the threaded transmission part (210) extends into the adjusting shaft hole (320) and is threadedly connected to the threaded mating part (130). When the limiting sleeve (30) is fixed, rotating the adjusting shaft (20) can push the saw blade shaft (10) forward or backward through the threaded transmission between the threaded mating part (130) and the threaded transmission part (210) to loosen or tighten the saw blade mounted on the saw blade mounting part (110). When the limiting sleeve (30) is not fixed, the adjusting shaft (20) is rotated, and the saw blade shaft (10) can rotate together with the adjusting shaft (20) to adjust the orientation of the saw blade mounted on the saw blade mounting part (110); The jigsaw blade adjustment mechanism also includes a limiting shaft (40), on which a limiting head (410) is provided. The limiting sleeve (30) is provided with a plurality of limiting slots (330); When the limiting head (410) is inserted into the limiting groove (330), the rotation of the limiting sleeve (30) is restricted; The limiting head (410) is allowed to rotate when it leaves the limiting groove (330); The jigsaw blade adjustment mechanism also includes an adjustment knob (80), which is fixedly connected to the adjustment shaft (20).

2. The jigsaw blade adjustment mechanism according to claim 1, characterized in that: The saw blade mounting part (110) includes a saw blade receiving hole (1110) and a saw blade locking hole (1120). The saw blade locking hole (1120) is opened on the side of the saw blade receiving hole (1110) and extends through the saw blade receiving hole (1110). or, The saw blade mounting part (110) includes a saw blade receiving groove (1130) and a saw blade connecting groove (1140). The saw blade receiving groove (1130) and the saw blade connecting groove (1140) are arranged crosswise to form a saw blade hanger (1150) at the end position.

3. The jigsaw blade adjustment mechanism according to claim 1, characterized in that: The jigsaw blade adjustment mechanism also includes a connecting sleeve (60), which is provided with a connecting part (610), a rotating cavity (620), and a limiting hole (630). The rotating cavity (620) passes through the connecting sleeve (60), and the limiting hole (630) communicates with the rotating cavity (620). The limiting sleeve (30) is disposed in the rotating cavity (620), the limiting shaft (40) is assembled in the limiting hole (630), and the limiting groove (330) corresponds to the limiting head (410). The saw blade shaft (10) and the adjusting shaft (20) are respectively assembled into the rotating cavity (620) from both ends.

4. The jigsaw blade adjustment mechanism according to claim 3, characterized in that: The rotating cavity (620) is also provided with a positioning ring (6210), which is used to prevent the limiting sleeve (30) from coming out of the end that accommodates the saw blade shaft (10); The jigsaw blade adjustment mechanism also includes an end cap (70), the end cap (70) includes an end cap shaft hole (720), the end cap shaft hole (720) passes through the end cap (70); The end cap (70) is mounted on the connecting sleeve (60) at one end of the adjusting shaft (20), and the adjusting shaft (20) extends into the rotating cavity (620) from the end cap shaft hole (720).

5. The jigsaw blade adjustment mechanism according to claim 1, characterized in that: The jigsaw blade adjustment mechanism also includes a clamping component (90), which includes a clamping cap (910) and a clamping screw (920). The adjustment knob (80) is provided with a handle screw hole (810) and an adjustment shaft mounting hole (820), and the adjustment shaft mounting hole (820) is connected to the handle screw hole (810). The adjusting shaft (20) has a fastening screw hole (220) at one end relative to the threaded transmission part (210). The adjusting shaft (20) is fitted into the adjusting shaft mounting hole (820), and the clamping screw (920) is fitted into the fastening screw hole (220) and clamps the adjusting knob (80) through the clamping cap (910).

6. The jigsaw blade adjustment mechanism according to claim 5, characterized in that: The jigsaw blade adjustment mechanism also includes a handle (100), which includes a handle part (1010) and a threaded connection part (1020). The threaded connection (1020) is fitted into the screw hole (810) of the handle by means of a threaded fit.

7. The jigsaw blade adjustment mechanism according to claim 1, characterized in that: The rotation-restricting part (120) is a non-circular shaft structure with a rotation-restricting surface (1210) on it. The rotation limiting hole (310) is a non-circular hole structure, and a limited rotation mating position (3110) is provided on it. The threaded mating part (130) is a threaded hole or a threaded post, and the threaded transmission part (210) is a threaded post or a threaded hole.

8. A jigsaw, comprising a saw frame (1) and a saw blade (2), characterized in that: It also includes a first saw blade adjustment mechanism (3) and a second saw blade adjustment mechanism (4); The first saw blade adjustment mechanism (3) and the second saw blade adjustment mechanism (4) are both mounted on the saw frame (1), and the two ends of the saw blade (2) are respectively mounted on the first saw blade adjustment mechanism (3) and the second saw blade adjustment mechanism (4); The first saw blade adjustment mechanism (3) and / or the second saw blade adjustment mechanism (4) are the jigsaw blade adjustment mechanisms as described in claim 1.

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