CN215280140U - Chuck component and jig saw - Google Patents

Abstract

The application provides a chuck subassembly and jig saw, through be equipped with the cooperation of second location portion on second location portion and the supporting rod on the lock sleeve to overcome torsion spring and to the lock sleeve in its ascending torsion in week, prevented that the lock sleeve from rotating wantonly behind the release saw blade, the opening of its through-hole of lock sleeve behind the release saw blade aligns with the opening in centre gripping space. When the saw blade is assembled, the opening of the through hole does not need to be dialed to the position aligned with the opening of the clamping space again, the saw blade is convenient to assemble, and the assembling steps and the assembling time are saved. Further, press in the tight space of clamp with the slider through the cam surface to compress tightly the surface of saw blade, like this, compress tightly the face increase, thereby can improve the stability of during operation saw blade, with the cutting accuracy who improves the saw blade.

Description

Chuck component and jig saw

Technical Field

The invention relates to the technical field of electric tools, in particular to a chuck assembly and a jig saw.

Background

The saw blade of the cutting tool is a consumable item requiring free removal from its reciprocating bar for ready replacement. Accordingly, various types of blade clamping devices have been designed to address this problem. Present cutting means's saw blade clamping device, most are after the saw blade is taken out, and chuck locking device restores to the normal position, need open the spanner when reassembling the saw blade, make the lock sleeve get back to release the saw blade position once more, and then locking is put into to the saw blade, and the operation needs multistep action, inserts the saw blade when opening the chuck, operates inconveniently, and the step is loaded down with trivial details.

Disclosure of Invention

The invention aims to provide a chuck component to solve the technical problem that the existing chuck component is complex to operate when a saw blade is dismounted.

To achieve the above object, the present application provides a chuck assembly for holding a saw blade having a tooth portion and a locating shoulder portion and connected to a tool body, comprising:

the clamping rod is provided with a clamping space and can reciprocate relative to the tool body along the installation direction of the saw blade; the clamping rod is at least provided with a containing groove along the length direction of the saw blade, and the containing groove is communicated with the clamping space; and one end of the clamping rod, which is far away from the tool body, is provided with at least one first positioning part;

one end of the pressure spring is connected with the tool body, and the other end of the pressure spring is connected with one end of the clamping rod;

at least one slider, one said slider disposed within one said receiving slot and partially accessible to said clamping space through said receiving slot;

the torsion spring is sleeved on the clamping rod;

the lock sleeve is sleeved on the torsion spring, a through hole for the positioning shoulder to pass through is formed in the lock sleeve, at least one second positioning part matched with the first positioning part is arranged on the inner wall of the lock sleeve, and the second positioning part and the opening of the through hole are located on the inner wall of the same plane; the inner wall of the lock sleeve is also provided with at least one cam surface, and the cam surface is used for pressing the sliding block part into the clamping space or releasing the sliding block part out of the clamping space;

wherein the saw blade has a clamped state and a released state; the cartridge assembly is configured to: the cam surface presses the sliding block into the clamping space, and the saw blade is in a clamping state; when the saw blade is released, the sliding block is at least partially released from the clamping space, the saw blade is ejected by the clamping rod, and at the moment, the first positioning part is matched with the second positioning part, so that the opening of the through hole is aligned with the opening of the clamping space.

Optionally, in the chuck assembly, the first positioning portion is a protrusion, and the second positioning portion is a groove or a limiting hole.

Optionally, in the cartridge assembly, the boss projection height is not less than 0.5 mm.

Optionally, in the chuck assembly, the number of the first positioning portions is two, and the first positioning portions are uniformly distributed along one end of the clamping rod away from the tool body; the second location portion is two, and follows the lock sleeve inner wall circumference evenly distributed.

Optionally, in the cartridge assembly, the cam surface includes an upper position and a lower position, the shoe presses against the blade when the upper position contacts the shoe, the shoe presses against a surface of the blade; when the low position is in contact with the slide block, the saw blade is released from the clamping space.

Optionally, in the cartridge assembly, the cam surface is two and the slider is two.

Optionally, in the chuck assembly, a disc-shaped limiting structure is arranged on the tool body, the center of the disc-shaped limiting structure is located on the axis of the clamping rod, and a limiting space is arranged on the end face of the limiting structure, which faces away from the tool body.

Optionally, in the chuck assembly, the circular arc angle of the limiting space is 75-100 °.

Optionally, in the chuck assembly, one end of the clamping rod, which is far away from the tool body, is provided with two opposite semi-circular arc-shaped protrusions; and, its radius is smaller than the radius of the said clamping lever; the side wall of the semicircular arc-shaped bulge is matched with the side wall of the through hole.

In another aspect, the application further provides a curve saw comprising the chuck assembly.

Compared with the prior art, the chuck subassembly that this application provided, through be equipped with the cooperation of second location portion on the lock sleeve and the first location portion on the supporting rod, in order to overcome torque spring is right the lock sleeve is at its ascending torsion in week, has prevented the lock sleeve is in the release arbitrary rotation behind the saw blade, in order to realize the lock sleeve is in the release behind the saw blade its through-hole the opening with the opening in centre gripping space aligns, is assembling like this during the saw blade, need not once more the opening of through-hole dial to with the position that the opening in centre gripping space aligns to conveniently assemble the saw blade, save assembly step and assemble duration. Further, through the cam surface will the slider is impressed and is pressed in tight space to compress tightly the surface of saw blade, like this, compress tightly the face increase, thereby can improve the stability of during operation saw blade, with the cutting accuracy who improves the saw blade. Furthermore, when the two sliding blocks and the two cam surfaces are both two, the two sliding blocks press the saw blade towards the center of the clamping space through the extrusion of the two cam surfaces, so that the saw blade can be positioned on the axis of the lock sleeve, the stability of the saw blade is further improved, the cutting precision is improved, and the service life is also prolonged.

Drawings

FIG. 1 is an exploded view of a chuck assembly provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a lock sleeve provided in an embodiment of the present application;

FIG. 3 is a schematic structural diagram of another lock sleeve provided in the embodiments of the present application;

FIG. 4 is a schematic structural diagram of another lock sleeve provided in the embodiments of the present application;

FIG. 5 is a schematic view of a single-slider clamped saw blade according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a dual slide clamping blade provided by an embodiment of the present application;

fig. 7 is a schematic structural diagram of a curve saw according to an embodiment of the present application.

Wherein the reference numerals of figures 1 to 7 are as follows:

10-a chuck assembly; 11-a clamping bar; 111-a receiving tank; 112-a first positioning portion; 12-a pressure spring; 113-a semicircular arc-shaped bulge; 114-a mounting portion; 13-a slide block; 14-a torsion spring; 15-a lock sleeve; 151-through holes; 152-a second positioning portion; 153-a cam surface; 153 a-high position; 153 b-low position; 153 c-third locator portion; 154-a deflector rod; 155-vertical anti-slip strips; 156- "X" shaped cleats; 16-a platen; 20-saw blade; 21-a serration; 22-positioning the shoulder; 30-a tool body; 31-disc-shaped limiting structure.

Detailed Description

To make the objects, advantages and features of the present invention more clear, the chuck assembly and the jig saw according to the present invention will be described in further detail with reference to fig. 1 to 7. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.

As used in this specification, the singular forms "a", "an" and "the" include plural referents, and the plural forms "a plurality" includes more than two referents unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise, and the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either fixedly connected, detachably connected, or integrally connected. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

Referring to fig. 1-2, in conjunction with fig. 7, the present application provides a cartridge assembly 10 for holding a saw blade 20 and connected to a tool body 30, the saw blade 20 having a saw tooth portion 21 and a locating shoulder 22. The cartridge assembly 10 includes: a clamping bar 11, a pressure spring 12, at least one slider 13, a torsion spring 14 and a lock sleeve 15. The clamping lever 11 has a clamping space (not shown), and the clamping lever 11 can reciprocate relative to the tool body 30 in a direction in which the saw blade 20 is mounted. Specifically, the tool body 30 is a reciprocating rod of a jigsaw, that is, the clamping rod 11 can reciprocate relative to the reciprocating rod of the jigsaw along the installation direction of the saw blade 20. Wherein, along the length direction of the saw blade 20, the clamping rod 11 is at least provided with a receiving groove 111, and the receiving groove 111 is communicated with the clamping space; and at least one first positioning portion 112 is disposed on an end of the clamping rod 11 away from the tool body 30. One end of the pressure spring 12 is connected to the tool body 30, and the other end of the pressure spring 12 is connected to one end of the clamping bar 11, and the pressure spring 12 can drive the clamping bar 11 to reciprocate relative to the tool body 30 along the installation direction of the saw blade 20. One of the sliders 13 is disposed in one of the receiving grooves 111, and the clamping space is partially accessible through the receiving groove 111. The torsion spring 14 is sleeved on the clamping rod 11. The lock sleeve 15 is sleeved on the torsion spring 14, a through hole 151 for the positioning shoulder 22 to pass through is formed in the lock sleeve 15, at least one second positioning portion 152 matched with the first positioning portion 112 is formed in the inner wall of the lock sleeve 15, and the second positioning portion 152 and the opening of the through hole 151 are located on the inner wall of the same plane; at least one cam surface 153 is further disposed on the inner wall of the lock sleeve 15, and the cam surface 153 is used for partially pressing the slider 13 into the clamping space or partially releasing the slider 13 from the clamping space.

Wherein the saw blade 20 has a clamped state and a released state; the cartridge assembly 10 is configured to: the cam surface 153 presses the slider 13 into the clamping space, and the saw blade 20 is in a clamped state; when the saw blade 20 is released, the slider 13 is at least partially released from the clamping space, and the saw blade 20 is ejected by the clamping rod 11, and at this time, the first positioning portion 112 and the second positioning portion 152 are engaged, so that the opening of the through hole 151 is aligned with the opening of the clamping space.

By providing the second positioning portion 152 on the lock sleeve 15 to cooperate with the first positioning portion 112 on the clamping rod 11, so as to overcome the torsion force of the torsion spring 14 on the lock sleeve 15 in the circumferential direction thereof, the lock sleeve 15 is prevented from rotating arbitrarily after releasing the saw blade 20, so that the opening of the through hole 151 of the lock sleeve 15 is aligned with the opening of the clamping space after releasing the saw blade 20, and thus, when the saw blade 20 is assembled, the opening of the through hole 151 does not need to be shifted to a position aligned with the opening of the clamping space again, thereby facilitating the assembly of the saw blade 20 and saving the assembly steps and the assembly time. Further, the slider 13 is pressed into the clamping space by the cam surface 153 to press the surface of the saw blade 20, so that the pressing surface is increased, thereby improving the stability of the saw blade 20 during operation and improving the cutting accuracy of the saw blade 20. Furthermore, when the two slide blocks 13 and the two cam surfaces 153 are both provided, the two slide blocks 13 compress the saw blade 20 towards the center of the clamping space by the extrusion of the two cam surfaces 153 on the two slide blocks 13, so that the saw blade 20 can be located on the axis of the lock sleeve 15, the stability of the saw blade 20 is further improved, the cutting precision is improved, and the service life is also prolonged.

With reference to fig. 1-2, specifically, the first positioning portion 112 is a protrusion, and the second positioning portion 152 is a groove or a limiting hole. When the second positioning portion 152 is a limiting hole, the limiting hole may be formed along the edge of the through hole 151 toward the edge of the lock sleeve 15, or may not be communicated with the through hole 151.

The height of the protrusion of the protruding portion is not less than 0.5mm, and if the second positioning portion 152 is a groove, the depth of the groove is not less than 0.5 mm. Therefore, the size of the matching limit is not less than 0.5 mm. The inventor researches and finds that the size of the fit limit is not less than 0.5mm, so that the driving force of the torsion spring 14 to the circumferential direction of the lock sleeve 15 can be overcome, and the circumferential limit of the lock sleeve 15 is more stable and firm.

With reference to fig. 2, two first positioning portions 112 are further provided and are uniformly distributed along an end of the clamping rod 11 away from the tool body 30. Namely, two convex parts are uniformly distributed on one end of the clamping rod 11 far away from the tool body 30. The number of the second positioning portions 152 is two, and the second positioning portions are uniformly distributed along the circumferential direction of the inner wall of the lock sleeve 15. That is, the lock sleeve 15 is provided with two grooves or through holes 151 uniformly distributed on the inner wall of the opening having the through holes 151. Therefore, the torsion of the torsion spring 14 to the circumferential direction of the lock sleeve 15 can be overcome more effectively, so that the circumferential direction of the lock sleeve 15 can be positioned more effectively, and the lock sleeve is prevented from rotating randomly in the circumferential direction. Of course, the number of the first positioning portions 112 and the second positioning portions 152 may be three.

With continued reference to fig. 2, and with reference to fig. 5-6, in one embodiment, the cam surface 153 includes a high position 153a and a low position 153 b. Specifically, the root of the cam surface 153 and the second positioning portion 152 are located on the same inner wall of the lock sleeve 15, the cam surface 153 extends in the axial direction of the lock sleeve 15, and the thickness of the cam surface 153 is increased along the circumferential direction of the lock sleeve 15, so that the thin end is a low position 153b and the thick end is a high position 153 a. When the high position 153a is in contact with the sliding block 13, the sliding block 13 presses the saw blade 20, and the sliding block 13 presses the surface of the saw blade 20; when the low position 153b is in contact with the slide 13, the saw blade 20 is released from the clamping space. Specifically, during releasing the saw blade 20, the first positioning portion 112 engages with the second positioning portion 152, the high position 153a is far away from the slider 13, the low position 153b is close to the slider 13, and the slider 13 is partially released from the clamping space along the radial direction of the lock sleeve 15. Meanwhile, the clamping rod 11 pushes the saw blade 20 out of the clamping space under the action of the pressure spring 12, and at this time, the first positioning portion 112 and the second positioning portion 152 are engaged, so that the opening position of the through hole 151 and the clamping space opening are aligned and locked after the saw blade 20 is released, and the saw blade 20 is conveniently mounted again.

Fig. 5 is a schematic view showing the structure of a single-block-clamped saw blade, fig. 6 is a schematic view showing the structure of a double-block-clamped saw blade, and more preferably, as shown in fig. 6, there are two cam surfaces 153 and two sliding blocks 13. The principle of pressing and releasing the blade 20 is identical to the principle of one cam surface 153 and one slider 13 described above and will not be described in detail here. Through the extrusion of two cam surfaces 153 to two sliders 13, two sliders 13 compress tightly saw blade 20 to the center of centre gripping space, like this saw blade 20 can be located the axis of lock sleeve 15, further improved the stability of saw blade 20, not only improved cutting accuracy, still improved life.

Referring to fig. 3-5, for convenience of operation, the outer circumferential surface of the lock sleeve 15 is provided with a driving lever 154 facing outward, or is provided with an anti-slip portion, so that when the saw blade 20 is dismounted, friction force can be increased, and the operation is more labor-saving. As shown in fig. 3, the anti-slip portion may be a circle of vertical anti-slip strips 155 evenly spaced along the circumference of the lock sleeve 15. As shown in fig. 4, the anti-slip portion may also be a circle of "X" shaped anti-slip strips 156 evenly spaced along the circumference of the lock sleeve 16.

A disc-shaped limiting structure 31 is arranged on the tool body 30, the center of the disc-shaped limiting structure 31 is located on the axis of the clamping rod 11, and a limiting space is arranged on the end surface of the disc-shaped limiting structure 31, which deviates from the tool body 30. Preferably, the arc angle of the limiting space is 75-100 degrees, such as 75 degrees, 85 degrees, 90 degrees, 95 degrees and 100 degrees. Specifically, one end of the lock sleeve 15 close to the disc-shaped limiting structure 31 is provided with a third positioning portion 153c along the axial direction thereof, the limiting space has two limiting boundaries along the axial direction of the lock sleeve 15, and the third positioning portion 153c moves in the limiting space in the process of assembling and disassembling the saw blade 20. By setting the range of the arc angle of the stopper space, when the saw blade 20 is detached, the third positioning portion 153c is moved to the boundary of the stopper space. I.e. to an extreme position, so that the position of the saw blade 20 can be intuitively known, and the disassembly process is quicker and more direct. As shown in fig. 5 to 6, specifically, one end of the clamping rod 11 passing through the mounting hole of the disc-shaped stopper structure 31 is connected to the pressure spring 13, and the diameter of the end is reduced to form a mounting portion 114, and the mounting portion 114 is pressed into the inner diameter of the pressure spring 13 to be connected to the pressure spring 13 in a pressing manner. The other end of the pressure spring 12 is fixed inside the reciprocating rod by a pressure plate 16, specifically, the pressure plate 16 is fixedly connected with the inside of the reciprocating rod, and the other end of the pressure spring 16 is clamped into the pressure plate 16 to be connected with the reciprocating rod.

In another embodiment, the end of the clamping rod 11 away from the tool body 30 is provided with two opposite semi-circular arc-shaped protrusions 113; and, its radius is smaller than the radius of the clamping bar 11; the side wall of the semi-arc-shaped protrusion is matched with the side wall of the through hole 151. The centers of the two circular arc-shaped protrusions 113 are on the axis of the clamping rod 11, and the radius of the two circular arc-shaped protrusions 113 is smaller than that of the clamping rod 11. The side wall of the arc-shaped protrusion 113 is engaged with the side wall of the through hole 151. The two circular arc-shaped protrusions 113 limit the lock sleeve 15 in the radial direction thereof, but do not limit the reciprocating movement of the clamping bar 11 in the mounting direction of the saw blade 20.

Referring to fig. 7, in another aspect, the present application further provides a jigsaw including the chuck assembly 10 described above.

The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.

Claims (10)

1. A chuck assembly for holding a saw blade having a tooth portion and a locating shoulder portion and connected to a tool body, comprising:

the clamping rod is provided with a clamping space and can reciprocate relative to the tool body along the installation direction of the saw blade; the clamping rod is at least provided with a containing groove along the length direction of the saw blade, and the containing groove is communicated with the clamping space; and one end of the clamping rod, which is far away from the tool body, is provided with at least one first positioning part;

one end of the pressure spring is connected with the tool body, and the other end of the pressure spring is connected with one end of the clamping rod;

at least one slider, one said slider disposed within one said receiving slot and partially accessible to said clamping space through said receiving slot;

the torsion spring is sleeved on the clamping rod;

the lock sleeve is sleeved on the torsion spring, a through hole for the positioning shoulder to pass through is formed in the lock sleeve, at least one second positioning part matched with the first positioning part is arranged on the inner wall of the lock sleeve, and the second positioning part and the opening of the through hole are located on the inner wall of the same plane; the inner wall of the lock sleeve is also provided with at least one cam surface, and the cam surface is used for pressing the sliding block part into the clamping space or releasing the sliding block part out of the clamping space;

wherein the saw blade has a clamped state and a released state; the cartridge assembly is configured to: the cam surface presses the sliding block into the clamping space, and the saw blade is in a clamping state; when the saw blade is released, the sliding block is at least partially released from the clamping space, the saw blade is ejected by the clamping rod, and at the moment, the first positioning part is matched with the second positioning part, so that the opening of the through hole is aligned with the opening of the clamping space.

2. The chuck assembly of claim 1, wherein the first locating portion is a boss and the second locating portion is a recess or a retaining hole.

3. The chuck assembly of claim 2, wherein the boss projection height is not less than 0.5 mm.

4. The chuck assembly of any one of claims 1-3, wherein the first positioning portions are two and are evenly distributed along an end of the gripping shank remote from the tool body; the second location portion is two, and follows the lock sleeve inner wall circumference evenly distributed.

5. The chuck assembly of claim 1, wherein said cam surface includes an upper position and a lower position, said shoe pressing against said blade and said shoe pressing against a surface of the blade when said upper position contacts said shoe; when the low position is in contact with the slide block, the saw blade is released from the clamping space.

6. The cartridge assembly of claim 1 or 5, wherein there are two cam surfaces and two sliders.

7. The chuck assembly of claim 1, wherein a disc-like stop structure is provided on the tool body, the disc-like stop structure having a center located on the axis of the gripping shank and a stop space provided on an end face of the stop structure facing away from the tool body.

8. The chuck assembly of claim 7, wherein the spacing space has a radius angle of 75 ° -100 °.

9. The chuck assembly of claim 1, wherein the end of the gripping shank remote from the tool body is provided with two opposing semi-circular arc-shaped protrusions; and, its radius is smaller than the radius of the said clamping lever; the side wall of the semicircular arc-shaped bulge is matched with the side wall of the through hole.

10. A jigsaw comprising a chuck assembly according to any one of claims 1 to 9.

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