Jig saw and saw blade adjusting mechanism thereof

Abstract

The utility model relates to the technical field of woodworking tools, in particular to a jig saw and a saw blade adjusting mechanism thereof. The saw blade adjusting mechanism comprises a saw blade shaft, an adjusting shaft, a limiting sleeve, a limiting shaft, a limiting knob, a connecting sleeve, an adjusting knob and a handle. According to the jig saw and the saw blade adjusting mechanism thereof, the tightness degree of the saw blade can be rapidly and efficiently adjusted, the orientation of the cutting edge of the saw blade can be flexibly adjusted in real time in the application of machining complex products, and therefore the applicability of a woodworking saw is improved, and the cost performance of the woodworking saw is improved.

Description

Technical Field

[0001] The present application relates to the technical field of woodworking tools, and particularly relates to a jigsaw and a saw blade adjustment mechanism thereof. Background Art

[0002] Once the saw blade on the existing woodworking saw is fixed, it is relatively difficult to adjust the tightness and orientation of the saw blade. When processing Figure 11 the shown curved structure, both the efficiency and accuracy need to be improved. Summary of the Utility Model

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

[0004] The saw blade adjustment mechanism of the jigsaw provided by the present application to solve its technical problems is as follows:

[0005] A saw blade adjustment mechanism of a jigsaw, characterized in that: it includes a saw blade shaft, an adjustment shaft, and a limiting sleeve; both ends of the saw blade shaft are respectively provided with a saw blade installation part, a rotation limiting part, and a thread matching part; the saw blade installation part is used for installing the saw blade, the rotation limiting part is used for limiting the rotation of the saw blade shaft, and the thread matching part is used for threadedly connecting the adjustment shaft; one end of the adjustment shaft for connecting the thread matching part is provided with a thread transmission part; the limiting sleeve is provided with a rotation limiting hole and an adjustment shaft hole, and the rotation limiting hole and the adjustment shaft hole are communicated; the rotation limiting part is arranged in the rotation limiting hole, and the thread transmission part extends into the adjustment shaft hole and is threadedly connected to the thread matching part.

[0006] When the limiting sleeve is fixed, by rotating the adjustment shaft, the saw blade shaft can be pushed forward or backward through the thread transmission between the thread matching part and the thread transmission part to realize the loosening or tensioning of the saw blade assembled on the saw blade installation part;

[0007] When the limiting sleeve is not fixed, by rotating the adjustment shaft, the saw blade shaft can rotate together with the adjustment shaft to realize the adjustment of the orientation of the saw blade assembled on the saw blade installation part.

[0008] Preferably, the saw blade adjustment mechanism of the jigsaw further includes a limiting shaft, and a limiting head is arranged on the limiting shaft; several limiting grooves are arranged on the limiting sleeve; when the limiting head extends into the limiting groove, the rotation of the limiting sleeve is restricted; when the limiting head leaves the limiting groove, the rotation of the limiting sleeve is allowed.

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

[0010] Preferably, the saw blade mounting portion includes a saw blade receiving hole and a saw blade locking hole. The saw blade locking hole is opened on the side of the saw blade receiving hole and penetrates through to the saw blade receiving hole; alternatively, the saw blade mounting portion includes a saw blade receiving groove and a saw blade connecting groove. The saw blade receiving groove and the saw blade connecting groove are arranged crosswise, and a saw blade hanging head is formed at the end position.

[0011] The two saw blade mounting portions respectively correspond to several saw blades that are most commonly used in practice. For the first structure, the end of the saw blade is inserted into the saw blade receiving hole, and then the saw blade is locked by means of a fastener such as a screw in cooperation with the saw blade locking hole. For the second structure, the end of the saw blade is inserted into the saw blade receiving groove, and then the saw blade is locked by passing a shaft member through the saw blade connecting groove and the mounting hole on the saw blade. For a saw blade with hooks provided at both ends, the saw blade can be installed by directly mounting the saw blade hooks onto the saw blade hanging head.

[0012] Preferably, the jigsaw saw blade adjustment mechanism further includes a connecting sleeve. The connecting sleeve is provided with a connecting portion, a rotating cavity, and a limiting hole; the rotating cavity penetrates through the connecting sleeve, and the limiting hole communicates with the rotating cavity; a limiting sleeve is arranged in the rotating cavity, a limiting shaft is assembled in the limiting hole, and a limiting groove corresponds to a limiting head; the saw blade shaft and the adjusting shaft are respectively assembled into the rotating cavity from both ends of the rotating cavity. The connecting portion is used for assembling the connecting sleeve onto the saw frame.

[0013] Preferably, a positioning ring is further arranged in the rotating cavity, and the positioning ring is used to prevent the limiting sleeve from disengaging from the end where the saw blade shaft is accommodated.

[0014] Preferably, the jigsaw saw blade adjustment mechanism further includes an end cap. The end cap includes an end cap shaft hole that penetrates through the end cap; the end cap is assembled on the connecting sleeve at one end of the adjusting shaft; the adjusting shaft extends into the rotating cavity from the end cap shaft hole. Further, a bearing groove for accommodating a bearing is also arranged on the end cap.

[0015] Preferably, the jigsaw saw blade adjustment mechanism further includes an adjustment knob, and the adjustment knob is fixedly connected to the adjusting shaft.

[0016] Preferably, the jigsaw saw blade adjustment mechanism further includes a bearing, and the bearing is arranged on the adjusting shaft to reduce the friction when the adjustment knob rotates.

[0017] Preferably, the adjustment knob is provided with an adjusting shaft assembly hole that communicates with the handle screw hole; the adjusting shaft is provided with a knob assembly portion, and when the knob assembly portion is assembled into the adjusting shaft assembly hole, a synchronous rotation connection can be formed, that is, when the adjustment knob rotates, the adjusting shaft can be driven to rotate together. Further preferably, the adjusting shaft assembly hole is an oval hole, and the knob assembly portion is an oval shaft.

[0018] Preferably, the jigsaw blade adjustment mechanism further includes a pressing member, which includes a pressing cap and a pressing screw; a handle screw hole is provided on the adjusting knob, and the adjusting shaft assembly hole communicates with the handle screw hole; a fastening screw hole is provided at one end of the adjusting shaft relative to the threaded transmission part; the knob assembly part is assembled in the adjusting shaft assembly hole, and the pressing screw is assembled in the fastening screw hole and presses the adjusting knob through the pressing cap.

[0019] Preferably, the jigsaw blade adjustment mechanism further includes a handle, which includes a handle part and a threaded connection part; the threaded connection part is assembled in the handle screw hole through thread fitting.

[0020] Preferably, the rotation limiting part is a non-circular shaft structure, and a rotation limiting surface is provided on the non-circular shaft structure; the limiting hole is a non-circular hole structure, and a rotation limiting fitting position is provided on the non-circular hole structure; the rotation limiting part and the rotation limiting fitting position cooperate with each other to realize the synchronous rotation of the limiting sleeve and the saw blade shaft, so that the orientation of the saw blade edge can be adjusted in real time.

[0021] Preferably, the rotation limiting part is a polyhedron shaft, and the rotation limiting hole is a polyhedron hole. The structures and sizes of the polyhedron shaft and the polyhedron hole match each other. When they cooperate with each other, they can limit the rotation of the saw blade shaft in the limiting sleeve, but allow the saw blade shaft to make telescopic movement along the axis direction in the limiting sleeve, so that the saw blade can be tightened or loosened.

[0022] Preferably, the threaded fitting part is a threaded hole or a threaded post, and the threaded transmission part is a threaded post or a threaded hole. The threaded hole and the threaded post cooperate with each other to drive the saw blade shaft to make telescopic movement along the axis direction in the limiting sleeve through threaded transmission, and can also drive the limiting sleeve and the saw blade shaft to rotate together through the adjusting shaft to adjust the orientation of the saw blade.

[0023] The jigsaw provided by the present application to solve its technical problems is:

[0024] A jigsaw, including 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; the first saw blade adjustment mechanism and the second saw blade adjustment mechanism are both arranged on the saw frame, and both ends of the saw blade are respectively arranged 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 is the jigsaw blade adjustment mechanism described in any of the foregoing technical solutions.

[0025] Preferably, the saw frame includes a cross beam, 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 cross beam.

[0026] Preferably, adjustment mechanism assembly parts are provided at the ends of the first vertical beam and the second vertical beam, and the adjustment mechanism assembly parts are used to assemble the jigsaw blade adjustment mechanism to the saw frame by cooperating with the connection parts on the connection sleeve.

[0027] Preferably, the connecting portion on the connecting sleeve includes a front vertical plate and a rear vertical plate. An embedding portion is defined between the front vertical plate and the rear vertical plate. Left and right assembly holes are respectively arranged at the left and right sides of the front and rear vertical plates; the adjustment mechanism assembly portion includes an embedding head, and left and right mating holes are arranged at the left and right sides of the embedding head; the embedding head is arranged in the embedding portion of the connecting sleeve and is fastened into one body through 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, a threaded limiting hole is arranged in the middle of the embedding head. The threaded limiting hole penetrates through the embedding head and communicates with the limiting hole on the connecting sleeve; an external thread is arranged on the limiting shaft, and the limiting shaft is arranged in the threaded limiting hole through thread fit. Rotating the limiting shaft can make the limiting head extend into or withdraw from the limiting groove on the limiting sleeve.

[0029] Beneficial technical effects:

[0030] The jigsaw and its saw blade adjustment mechanism disclosed in the present application, through the cooperation among the saw blade shaft, the adjusting shaft, the limiting sleeve and the connecting sleeve, can not only realize the quick and efficient adjustment of the tightness of the saw blade, but also can flexibly adjust the cutting edge orientation of the saw blade in real time during the application of processing relatively complex products, such as in the application of processing a Figure 10 curved structure as shown, thus solving the technical problems defined in the background art part of the present application and improving the cost performance of the existing woodworking saws.

[0031] The technical solutions and technical effects of the present application will be introduced in detail below in conjunction with the specification drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 : Three-dimensional structure schematic diagram of the jigsaw;

[0033] Figure 2 : Figure 1 Exploded view of the structure from the first perspective of

[0034] Figure 3 : Figure 1 Exploded view of the structure from the second perspective of

[0035] Figure 4 : Figure 2 Structure schematic diagram of the saw blade shaft in

[0036] Figure 5 : Structure schematic diagram of the handle;

[0037] Figure 6 : Structure schematic diagram of the limiting shaft and the limiting knob;

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

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

[0040] Figure 9 : Schematic diagram of the structure of the adjustment mechanism assembly part;

[0041] Figure 10 : Schematic diagram of the structural embodiment of the change of the saw blade shaft;

[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 cover, 80 - Adjusting knob, 90 - Pressing component, 100 - Handle, 200 - Bearing;

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

[0046] 1110 - Saw blade accommodation hole, 1120 - Saw blade locking hole, 1130 - Saw blade accommodation groove, 1140 - Saw blade connection groove, 1150 - Saw blade hanging head;

[0047] 1210 - Rotation limiting surface;

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

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

[0050] 3110 - Rotation limiting mating position;

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

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

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

[0054] 6210 - Positioning ring, 6220 - Screw hole part;

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

[0056] 810 - Handle screw hole, 820 - Adjusting shaft assembly hole;

[0057] 910 - Compression cap, 920 - Compression 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 - Cross beam, 12 - First vertical beam, 13 - Second vertical beam, 14 - Adjustment mechanism assembly part;

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

[0062] Please refer to Figures 1-10 , the saw blade adjustment mechanism of the jigsaw disclosed in this application includes a saw 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 cover 70, and an adjustment knob 80.

[0063] Both ends of the saw blade shaft 10 are respectively provided with a saw blade installation part 110, a rotation limiting part 120, and a thread mating part 130. The saw blade installation part 110 is used for installing the saw blade, the rotation limiting part 120 is used for restricting the rotation of the saw blade shaft 10, and the thread mating part 130 is used for threadedly connecting the adjustment shaft 20.

[0064] The saw blade installation part 110 can install the saw blade in the following two configurations:

[0065] Please refer to Figure 10 , the saw blade installation part 110 includes a saw blade accommodation hole 1110 and a saw blade locking hole 1120. The saw blade locking hole 1120 is opened on the side of the saw blade accommodation hole 1110 and penetrates through to the saw blade accommodation hole 1110; or, please refer to Figure 4 , the saw blade installation part 110 includes a saw blade accommodation groove 1130 and a saw blade connection groove 1140. The saw blade accommodation groove 1130 and the saw blade connection groove 1140 are cross - arranged to form a saw blade hanging head 1150 at the end position.

[0066] The two saw blade installation parts 110 respectively correspond to several of the most commonly used saw blades in practice. For the first structure, the end of the saw blade is inserted into the saw blade accommodation hole 1110, and then the saw blade is locked by using fasteners such as screws in cooperation with the saw blade locking hole 1120. For the second structure, the end of the saw blade is inserted into the saw blade accommodation groove 1130, and then the saw blade is locked by passing a shaft component through the saw blade connection groove 1140 and the installation hole on the saw blade. For a saw blade with hooks at both ends, the saw blade can be installed by directly installing the saw blade hooks onto the saw blade hanging head 1150.

[0067] One end of the adjusting shaft 20 for connecting the threaded mating part 130 is provided with a threaded transmission part 210; the threaded transmission 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 transmission part 210. In this embodiment, the threaded mating part 130 is a threaded hole and the threaded transmission part 210 is a threaded post. The threaded transmission part 210 and the threaded mating part 130 are threadedly connected.

[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 communicated. The rotation limiting hole 310 is used to cooperate with the rotation limiting part 120 to realize the 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 realize the locking of the limiting sleeve 30.

[0069] The rotation limiting part 120 is a non-circular shaft structure, and a rotation limiting surface 1210 is provided on the non-circular shaft structure; the rotation limiting hole 310 is a non-circular hole structure, and a rotation limiting mating position 3110 is provided on the non-circular hole structure; the rotation limiting surface 1210 and the rotation limiting mating position 3110 can 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 limiting part 120 can also be a polyhedron shaft (prismatic shaft), and the rotation limiting hole 310 can also be a polyhedron hole.

[0070] The rotation limiting part 120 of the saw blade shaft 10 is arranged 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, through the threaded transmission between the threaded mating part 130 and the threaded transmission part 210, push the saw blade shaft 10 forward or backward to realize the loosening or tensioning of the saw blade assembled on the saw blade mounting part 110.

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

[0073] Please refer to 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 the 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 realize the locking or loosening of the limiting sleeve 30: when the limiting head 410 extends into the limiting groove 330, the rotation of the limiting sleeve 30 is restricted; when the limiting head 410 leaves the limiting groove 330, the rotation of the limiting sleeve 30 is allowed.

[0074] The connecting sleeve 60 is provided with a connecting portion 610, a rotating cavity 620, and a limiting hole 630. The rotating cavity 620 penetrates through the connecting sleeve 60, forming assembly holes for the saw blade shaft 10 and the adjusting shaft 20 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] The limiting sleeve 30 is arranged 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 of the rotating cavity 620.

[0076] Please refer to Figure 7 , a positioning ring 6210 is further arranged in the rotating cavity 620, and the positioning ring 6210 is used to prevent the limiting sleeve 30 from disengaging from one end accommodating the saw blade shaft 10.

[0077] The end cover 70 includes a bearing groove 710 and an end cover shaft hole 720, and the end cover shaft hole 720 penetrates 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 assembled in the rotating cavity 620 can only rotate in the rotating cavity 620 under the action of the positioning ring 6210 and the end cover 70, and cannot perform a linear motion 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 vertical plate 6110 and a rear vertical plate 6120. An embedding portion 6130 is defined between the front vertical plate 6110 and the rear vertical plate 6120. Left assembly holes 6140 and right assembly holes 6150 are respectively arranged on the left and right sides of the front and rear vertical plates. The embedding portion 6130, the left assembly hole 6140, and the right assembly hole 6150 are used to cooperate with the corresponding structures on the saw frame to realize the fixed assembly of the connecting sleeve 60 on the saw frame.

[0080] The adjusting knob 80 is fixedly connected to the adjusting shaft 20 and is used to operate the rotation of the adjusting shaft 20. The fixed connection manner between the adjusting knob 80 and the adjusting shaft 20 can be realized by various connection manners in the prior art, such as welding, integral molding, etc. The adjusting knob 80 in this embodiment includes a knob body, and a handle screw hole 810 and an adjusting shaft assembly hole 820 are arranged on the knob body; the handle screw hole 810 is used to assemble the handle 100, and the adjusting shaft assembly hole 820 is used to assemble the adjusting shaft 20.

[0081] The adjusting shaft assembly hole 820 is a non-circular hole such as an oval hole or a polyhedron hole. The knob assembly part 230 on the adjusting shaft 20 has a mutually matching structure and dimensions (such as an oval shaft or a polyhedron shaft). When the adjusting shaft 20 is assembled into the adjusting shaft assembly hole 820, a fixed connection for synchronous rotation can be formed, that is, when the adjusting knob 80 is rotated, the adjusting shaft 20 can be driven to rotate together.

[0082] The jigsaw blade adjusting mechanism further includes a pressing component 90. The pressing component 90 includes a pressing cap 910 and a pressing screw 920. The adjusting shaft assembly hole 820 on the adjusting knob 80 communicates with the handle screw hole 810. One end of the adjusting shaft 20 relative to the threaded transmission part 210 is provided with a fastening screw hole 220. The adjusting shaft 20 is assembled in the adjusting shaft assembly hole 820, and the pressing screw 920 is assembled in the fastening screw hole 220 and presses the adjusting knob 80 through the pressing cap 910.

[0083] To reduce the friction when the adjusting knob 80 rotates, in a variant embodiment of the present application, the jigsaw blade adjusting mechanism further includes a bearing 200. The bearing 200 is arranged on the adjusting shaft 20 and partially located in the bearing groove 710, for reducing the friction when the adjusting knob 80 rotates.

[0084] In a variant embodiment of the present application, the jigsaw blade adjusting mechanism further includes a handle 100. The handle 100 includes a handle part 1010 and a threaded connection part 1020. The threaded connection part 1020 is assembled in the handle screw hole 810 of the adjusting knob 80 through thread fitting.

[0085] The jigsaw including the jigsaw blade adjusting mechanism disclosed in the present application includes a saw frame 1 and a saw blade 2; it further includes a first saw blade adjusting mechanism 3 and a second saw blade adjusting mechanism 4. The first saw blade adjusting mechanism 3 and the second saw blade adjusting mechanism 4 are both arranged on the saw frame 1, and both ends of the saw blade 2 are respectively arranged on the first saw blade adjusting mechanism 3 and the second saw blade adjusting mechanism 4. At least one of the first saw blade adjusting mechanism 3 and the second saw blade adjusting mechanism 4 is the jigsaw blade adjusting mechanism disclosed in the present application.

[0086] The saw frame 1 can be the saw frame of various woodworking saws in the prior art, and various fixing connection methods in the prior art can also be used to fix the connecting sleeve 60 of the jigsaw blade adjusting mechanism to the saw frame 1. The saw frame structure and connection method in this embodiment are:

[0087] The saw frame 1 includes a cross beam 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 cross beam 11. Adjusting mechanism assembly parts 14 are arranged at the ends of the first vertical beam 12 and the second vertical beam 13. The adjusting mechanism assembly parts 14 are used to cooperate with the connecting parts 610 on the connecting sleeve 60 to assemble the jigsaw blade adjusting mechanism to the saw frame 1.

[0088] The adjusting mechanism assembly part 14 includes an embedding head 141, and a left mating hole 142 and a right mating hole 143 are arranged on the left and right sides of the embedding head 141; the embedding head 141 is arranged in the embedding part 6130 on the connecting sleeve 60 and is fastened into one body through the left and right assembly holes of the connecting sleeve 60, the left and right mating holes of the saw frame 1 and the cooperation of fasteners such as screws and nuts.

[0089] Please refer to Figure 9 , a threaded limiting hole 144 is arranged in the middle part of the embedding head 141, the threaded limiting hole 144 penetrates through the embedding head 141 and communicates with the limiting hole 630 on the connecting sleeve 60; the limiting shaft 40 is arranged in the threaded limiting hole 144 through the threaded fit between the external thread 420 and the threaded limiting hole 144. Rotating the limiting shaft 40 can make the limiting head 410 extend into or withdraw from the limiting groove 330 on the limiting sleeve 30.

[0090] Adjustment of the tightness of the saw blade:

[0091] By rotating the limiting shaft 40 through 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 rotating the adjusting shaft 20 through the adjusting knob 80, since the saw blade shaft 10 cannot rotate, it can only move linearly forward or linearly backward along the axis direction of the limiting sleeve 30 under the interaction of the threaded mating part 130 and the threaded transmission part 210, so as to tighten or loosen the saw blade 2.

[0093] Adjustment of the orientation of the saw blade edge:

[0094] By rotating the limiting shaft 40 through the limiting knob 50, the limiting head 410 on the limiting shaft 40 withdraws 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 rotating the adjusting shaft 20 through the adjusting knob 80, since the saw blade shaft 10 can rotate at this time, it can drive the saw blade 2 to rotate synchronously together, realizing the adjustment of the orientation of the saw blade edge.

[0096] The jigsaw and its saw blade adjusting mechanism disclosed in this application, through the cooperation between the saw blade shaft, the adjusting shaft, the limiting sleeve and the connecting sleeve, can not only achieve fast and efficient adjustment of the tightness of the saw blade, but also can flexibly adjust the orientation of the saw blade edge in real time in the application of processing relatively complex products, such as in the application of processing a curved structure as Figure 11 shown, thus solving the technical problems defined in the background art part of this application and improving the cost performance of the existing woodworking saws.

[0097] The technical solutions and technical effects of the present application have been elaborated in detail in combination with the accompanying drawings of the specification and specific embodiments. It should be noted that those skilled in the art can also develop other embodiments on this basis; any simple deformation and equivalent replacement that do not depart from the innovative concept of the present application are covered by the present application and belong to the protection scope of this patent.

Claims

1. A jigsaw blade adjustment mechanism, characterized in that: It comprises a saw blade shaft (10), an adjustment shaft (20), and a limiting sleeve (30); The two ends of the saw blade shaft (10) are respectively provided with a saw blade mounting portion (110), a rotation limiting portion (120), and a threaded matching portion (130); The saw blade mounting portion (110) is used to mount the saw blade, the rotation limiting portion (120) is used to limit the rotation of the saw blade shaft (10), and the threaded matching portion (130) is used to be threadedly connected to the adjustment shaft (20); One end of the adjusting shaft (20) used for connecting to the threaded matching portion (130) is provided with a threaded transmission portion (210); 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 in communication with each other; The rotation limiting portion (120) is disposed in the rotation limiting hole (310), and the threaded transmission portion (210) extends into the adjustment shaft hole (320) and is threadedly connected to the threaded matching portion (130); When the limiting sleeve (30) is fixed, the adjusting shaft (20) is rotated, and the saw blade shaft (10) can be pushed forward or backward through the threaded transmission between the threaded matching portion (130) and the threaded transmission portion (210) to achieve loosening or tensioning of the saw blade mounted on the saw blade mounting portion (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 portion (110).

2. The jig saw blade adjustment mechanism according to claim 1, characterized in that: The jigsaw blade adjustment mechanism further comprises a limiting shaft (40), wherein a limiting head (410) is provided on the limiting shaft (40); The limiting sleeve (30) is provided with a plurality of limiting grooves (330); When the limiting head (410) extends into the limiting groove (330), the rotation of the limiting sleeve (30) is limited; When the limiting head (410) leaves the limiting groove (330), the limiting sleeve (30) is allowed to rotate.

3. The jig saw blade adjustment mechanism according to claim 1, characterized in that: The saw blade mounting portion (110) comprises a saw blade accommodating hole (1110) and a saw blade locking hole (1120); the saw blade locking hole (1120) is opened on the side of the saw blade accommodating hole (1110) and penetrates the saw blade accommodating hole (1110); or, The saw blade mounting portion (110) comprises a saw blade accommodating groove (1130) and a saw blade connecting groove (1140); the saw blade accommodating groove (1130) and the saw blade connecting groove (1140) are cross-arranged to form a saw blade hanging head (1150) at the end position.

4. The jig saw blade adjustment mechanism according to claim 2, characterized in that: The jigsaw blade adjustment mechanism further comprises a connecting sleeve (60), wherein the connecting sleeve (60) is provided with a connecting portion (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) is connected to the rotating cavity (620); The limiting sleeve (30) is arranged in the rotating chamber (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 adjustment shaft (20) are respectively assembled into the rotating cavity (620) from both ends of the rotating cavity (620).

5. The jig saw blade adjustment mechanism according to claim 4, characterized in that: A positioning ring (6210) is also provided in the rotating cavity (620), and the positioning ring (6210) is used to prevent the limiting sleeve (30) from falling out from one end accommodating the saw blade shaft (10); The jigsaw blade adjustment mechanism further comprises an end cover (70), wherein the end cover (70) comprises an end cover shaft hole (720), and the end cover shaft hole (720) passes through the end cover (70); The end cover (70) is assembled on the connecting sleeve (60) and is located at one end of the adjusting shaft (20); the adjusting shaft (20) extends from the end cover shaft hole (720) into the rotating chamber (620).

6. The jig saw blade adjustment mechanism according to claim 1, characterized in that: The jigsaw blade adjustment mechanism further comprises an adjustment knob (80), wherein the adjustment knob (80) is fixedly connected to the adjustment shaft (20).

7. The jig saw blade adjustment mechanism according to claim 6, characterized in that: The jigsaw blade adjustment mechanism further comprises a pressing component (90), wherein the pressing component (90) comprises a pressing cap (910) and a pressing screw (920); The adjusting knob (80) is provided with a handle screw hole (810) and an adjusting shaft assembly hole (820), and the adjusting shaft assembly hole (820) is connected to the handle screw hole (810); A fastening screw hole (220) is provided on one end of the adjusting shaft (20) opposite to the threaded transmission part (210); The adjusting shaft (20) is assembled in the adjusting shaft assembly hole (820), and the pressing screw (920) is assembled in the fastening screw hole (220) and presses the adjusting knob (80) through the pressing cap (910).

8. The jig saw blade adjustment mechanism according to claim 7, characterized in that: The jigsaw blade adjustment mechanism further comprises a handle (100), wherein the handle (100) comprises a handle portion (1010) and a threaded connection portion (1020); The threaded connection portion (1020) is assembled in the handle screw hole (810) through threaded fitting.

9. The jig saw blade adjustment mechanism according to claim 1, characterized in that: The rotation limiting portion (120) is a non-circular shaft structure, and is provided with a rotation limiting surface (1210); The rotation limiting hole (310) is a non-circular hole structure, and a limited rotation fitting position (3110) is arranged on it; The threaded matching portion (130) is a threaded hole or a threaded column, and the threaded transmission portion (210) is a threaded column or a threaded hole.

10. 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 arranged on the saw frame (1), and the two ends of the saw blade (2) are respectively arranged 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) is a jigsaw blade adjustment mechanism as claimed in any one of claims 1 to 9.

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