CN215509261U

CN215509261U - Chuck component and jig saw

Info

Publication number: CN215509261U
Application number: CN202121451752.1U
Authority: CN
Inventors: 赵殿虎; 陆晓斌; 朱爱民; 刘家波
Original assignee: Zhejiang Crown Electric Tools Manufacture Co ltd
Current assignee: Zhejiang Crown Electric Tools Manufacture Co ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2022-01-14
Anticipated expiration: 2031-06-29

Abstract

The application provides a chuck component and jig saw, through the cam surface with the slider part is pressed into the centre gripping space or will the slider part releases the centre gripping space to the saw blade compresses tightly and releases. Meanwhile, the cam surface and the lock sleeve are detachably connected, so that the cam surface and the lock sleeve are of a split structure. Because the cam surface and the lock sleeve in the whole chuck component are worn most seriously when the saw blade is dismounted at ordinary times, the cam surface and the lock sleeve are in a split structure, so that one of the cam surface and the lock sleeve can be conveniently replaced after being worn, and consumables are saved.

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 through rotatory lock sleeve, rotate with the cam surface of lock sleeve structure as an organic whole in order to drive, thereby make the high-order position of cam surface compress tightly the slider in order to lock the saw blade, the low-order position release slider of cam surface is in order to unblock the saw blade, it all need carry out the linkage cam surface through rotating the lock sleeve at every turn, it is not only not directly perceived at the unblock saw blade, and when the cam surface of the friction of needs high frequency has wearing and tearing, need change the lock sleeve simultaneously, thereby more materials have been wasted.

Disclosure of Invention

The invention aims to provide a chuck component to solve the technical problem that materials are wasted when a cam surface needs to be replaced in the conventional chuck component.

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 fixed seat is connected with the tool body;

the movable seat is movably connected with the fixed seat and forms a clamping space, and the movable seat can reciprocate relative to the movable seat along the installation direction of the saw blade; wherein, along the length direction of the saw blade, the movable seat is provided with an accommodating groove;

one end of the pressure spring is fixedly connected with the tool body, and the other end of the pressure spring is in contact connection with one end of the movable seat;

the sliding block is arranged in the accommodating groove and can at least partially enter the clamping space through the accommodating groove;

the torsion spring is sleeved on the fixed seat and the movable seat in the circumferential direction;

the lock sleeve is sleeved on the torsion spring;

the lock sleeve is sleeved on the torsion spring and is provided with a through hole; and the number of the first and second groups,

the cam surface is detachably connected with the inner wall of the lock sleeve; the cam surface is used to press the slider part into the clamping space or to release the slider part out of the clamping space.

Optionally, in the chuck assembly, at least one first positioning portion is provided on an end of the movable seat away from the tool body; the lock sleeve is provided with at least one second positioning part matched with the first positioning part.

Optionally, in the chuck assembly, the first positioning structure 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 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 chuck assembly, a slide rail is arranged on the cam surface in the axial direction of the lock sleeve, a guide groove is arranged on the inner side wall of the lock sleeve, and the slide rail is connected with the guide groove.

Optionally, in the chuck assembly, the fixed seat is provided with a sliding groove along a direction of a long edge thereof, and the movable seat is provided with a guide rail along the direction of the long edge thereof; the guide rail is arranged in the sliding groove.

Optionally, in the cartridge assembly, the movable seat is in contact connection with the fixed seat surface.

Optionally, in the chuck assembly, a first arc-shaped protrusion is arranged at one end of the movable seat, which is far away from the tool body, and a second arc-shaped protrusion is arranged at one end of the fixed seat, which is far away from the tool body; the circle center of the first arc-shaped bulge, the circle center of the second arc-shaped bulge, the circle center of the fixed seat and the circle center of the movable seat are positioned on the same axis, and the radius of the first arc-shaped bulge is smaller than that of the movable seat; the radius of the second arc-shaped bulge is smaller than that of the fixed seat; and the side walls of the first arc-shaped bulge and the second arc-shaped bulge are 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 clamping head assembly provided by the application presses the sliding block part into the clamping space or releases the sliding block part out of the clamping space through the cam surface so as to compress and release the saw blade. Meanwhile, the cam surface and the lock sleeve are detachably connected, so that the cam surface and the lock sleeve are of a split structure. Because the cam surface and the lock sleeve in the whole chuck component are worn most seriously when the saw blade is dismounted at ordinary times, the cam surface and the lock sleeve are in a split structure, so that one of the cam surface and the lock sleeve can be conveniently replaced after being worn, and consumables are saved.

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 cross-sectional view of a cartridge assembly provided in an embodiment of the present application;

FIG. 4 is a block diagram of a cam surface provided by an embodiment of the present application;

FIG. 5 is an assembly view of a movable seat and a fixed seat provided in the embodiments of the present application;

fig. 6 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 6 are as follows:

10-a chuck assembly; 11-a fixed seat; 111-a second arc-shaped protrusion; 112-disc shaped base; 113-clamping; 114-a chute; 12-a movable seat; 121-accommodating grooves; 122-a first positioning portion; 123-a first arc-shaped protrusion; 124-a mounting portion; 125-a guide rail; 13-a pressure spring; 14-a slide block; 15-a torsion spring; 16-a lock sleeve; 161-a second positioning portion; 162-a card slot; 163-a via; 164-a guide groove; 17-a cam surface; 171-a slide rail; 172-deflector rod; 173-high position; 174-low position; 18-a platen; 20-saw blade; 21-a serration; 22-positioning the shoulder; 30-tool body.

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 6. 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 in conjunction with fig. 6, a cartridge assembly 10, the cartridge assembly 10 for holding a saw blade 20 and being connected to a tool body 30, the saw blade 20 having a saw tooth portion 21 and a locating shoulder portion 22, the cartridge assembly 10 comprising: the device comprises a fixed seat 11, a movable seat 12, a pressure spring 13, a slide block 14, a torsion spring 15, a cam surface 17 and a lock sleeve 16. The fixed seat 11 is connected with the tool body 30, the tool body 30 is a tool body 30 of a jig saw, and specifically is a reciprocating rod of the jig saw, that is, the fixed seat 11 is connected with the reciprocating rod of the jig saw. The movable seat 12 is movably connected with the fixed seat 11 and forms a clamping space (not shown in the figure), and the movable seat 12 can reciprocate relative to the movable seat 12 along the installation direction of the saw blade 20; wherein, along the length direction of the saw blade 20, the movable seat 12 is provided with a receiving groove 121. One end of the pressure spring 13 is fixedly connected with the tool body 30, and the other end of the pressure spring 13 is in contact connection with one end of the movable seat 12. The slider 14 is disposed in the receiving groove 121, and the clamping space is at least partially accessible through the receiving groove 121. The torsion spring 15 is sleeved on the fixed seat 11 and the movable seat 12 in the circumferential direction. The lock sleeve 16 is sleeved on the torsion spring 15. The cam surface 17 is detachably connected with the inner wall of the lock sleeve 16; the cam surface 17 is used to press the slide 14 partially into the clamping space or to release the slide 14 partially out of the clamping space.

The shoe 14 is partially pressed into the clamping space or the shoe 14 is partially released from the clamping space by the cam surface 17 to compress and release the saw blade 20. Meanwhile, the cam surface 17 is detachably connected with the lock sleeve 16, so that the cam surface 17 and the lock sleeve 16 are of a split structure. Because the cam surface 17 and the lock sleeve 16 in the whole chuck assembly 10 are worn most seriously when the saw blade 20 is dismounted at ordinary times, the cam surface 17 and the lock sleeve 16 are in a split structure, so that one of the cam surface 17 and the lock sleeve 16 can be replaced conveniently after being worn, and consumables are saved.

Referring to fig. 2 in conjunction with fig. 1, in one embodiment, at least one first positioning portion 122 is disposed on an end of the movable seat 12 away from the tool body. The lock sleeve 16 is further provided with at least one second positioning portion 161 engaged with the first positioning portion 122. A through hole 163 is provided in the lock sleeve 16 to allow the positioning shoulder 22 to enter 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 17 presses the slide 14 into the clamping space with the saw blade 20 in a clamped state; when the saw blade 20 is released, the sliding block 14 is at least partially released from the clamping space, the first positioning portion 122 is disengaged from the second positioning portion 161, the movable seat 12 ejects the saw blade 20, and at this time, the first positioning portion 122 is engaged with the second positioning portion 161, so that the opening of the lock sleeve 16 is aligned with the opening of the clamping space.

Referring to fig. 2, in detail, with reference to fig. 1, the first positioning portion 122 is a protrusion, and the second positioning portion 161 is a groove or a limiting hole. When the second positioning portion 161 is a limiting hole, the limiting hole may be opened along an edge of the through hole 163 toward an edge of the lock case 16, and communicate with the through hole 163. Of course, it may not communicate with the through hole 163.

The height of the protrusion of the protruding portion is not less than 0.5mm, and if the second positioning portion 161 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 drive force of the torsion spring 15 to the circumferential direction of the lock sleeve 16 can be overcome, and the circumferential limit of the lock sleeve 16 is more stable and firm.

With continued reference to FIG. 4 in conjunction with FIG. 3, in one embodiment the cam surface 17 includes a high position 173 and a low position 174. Specifically, the root of the cam surface 17 and the second positioning portion 161 are located on the same inner wall of the lock sleeve 16, the cam surface 17 extends in the axial direction of the lock sleeve 16, and the thickness of the cam surface 17 in the circumferential direction of the lock sleeve 16 is increased from a thin thickness to a thick thickness, so that the thin end is a low position 174 and the thick end is a high position 173. When the high position 173 contacts the slide 14, the slide 14 presses against the saw blade 20, and the slide 14 presses against the surface of the saw blade 20. When the low position 174 is in contact with the shoe 14, the blade 20 is released from the clamping space. Specifically, during releasing the saw blade 20, the first positioning portion 122 engages with the second positioning portion 161, the high position 173 is far away from the slider 14, the low position 174 is close to the slider 14, and the slider 14 is partially released from the clamping space along the radial direction of the lock sleeve 16. At the same time, the movable seat 12 pushes the saw blade 20 out of the clamping space under the action of the pressure spring 13, and at this time, the first positioning portion 122 and the second positioning portion 161 are engaged, so that the opening position of the through hole 163 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.

In a further embodiment, the cam surface 17 is provided with a slide rail along the axial direction of the lock sleeve 26, the side inner wall of the lock sleeve 16 is provided with a guide groove 164, and the slide rail 171 is connected with the guide groove 164. Thus, the cam surface 17 has a fixed rotation track, so that the chuck assembly 10 can operate more stably during the process of mounting and dismounting the saw blade 20.

Referring to fig. 2, in particular, for convenience of operation, a shift lever 172 is provided, and a shift lever groove (not shown) is provided on a side wall of the lock sleeve 16, and the shift lever 172 partially passes through the shift lever groove to protrude out of the lock sleeve 16. Of course, when the guiding slot 164 is a through hole slot that extends through the thickness of the lock sleeve, the shift lever 172 may also extend partially through the guiding slot 164 to protrude out of the lock sleeve 16. That is, the lever groove may be a through hole groove formed in the lock sleeve separately from the guide groove 164, or may be the same groove as the guide groove 164. Therefore, when the saw blade 20 is dismounted, the shifting rod 172 can be shifted to drive the cam surface 17 to move, and the operation is more labor-saving.

Referring to fig. 5, the fixed seat 11 is provided with a sliding slot 114 along the direction of the long side thereof, and the movable seat 12 is provided with a guide rail 125 along the direction of the long side thereof; the guide rail 125 is disposed within the chute 114. Therefore, the movable seat 12 can reciprocate along the installation direction of the saw blade 20, the movable seat 12 is movably connected with the fixed seat 11 by adopting the structures of the guide rail 125 and the sliding groove 114, so that the stress of the whole mechanism is more reasonable, and the service life is prolonged.

In another embodiment, since the motion driving force of the movable seat 12 is derived from the pressure spring 13, the movable seat 12 and the fixed seat 11 can also be in surface contact connection while ensuring the stability of the pressure spring 13 along the moving track in the direction of assembling the saw blade 20. This reduces the friction between the fixed seat 11 and the movable seat 12, thereby increasing the service life thereof.

Specifically, the bottom of the fixed seat 11 is a disc-shaped base 112, and a mounting hole is formed in the middle of the fixed seat, and one end of the movable seat 12, which is far away from the first positioning portion 122, passes through the mounting hole. At this time, since the mounting hole limits the degree of freedom of the movable base 12 in the radial direction of the lock sleeve 16, even if the stability of the movement locus of the pressure spring 13 in the direction of assembling the saw blade 20 cannot be ensured, the movable base 12 and the movable base 12 can be connected in a surface contact manner and the stability of the reciprocating movement of the movable base 12 can be ensured. Specifically, the movable seat 12 penetrates through one end of the mounting hole to be connected with the pressure spring 13, the diameter of the end is reduced to form a mounting portion 124, and the mounting portion 124 is pressed into the inner diameter of the pressure spring 13 to be tightly connected with the pressure spring 13. The other end of the pressure spring 13 is fixed inside the reciprocating rod through a pressure plate 18, specifically, the pressure plate 18 is fixedly connected with the inside of the reciprocating rod, and the other end of the pressure spring 13 is clamped into the pressure plate 18 to be connected with the reciprocating rod.

Referring to fig. 4 in conjunction with fig. 1, further, a locking groove 162 is formed at an end of the lock sleeve 16 close to the tool body 30, a locking position 113 is formed on a side wall of the disc-shaped base 112, and the locking position 113 is engaged with the locking groove 162 to limit the position of the lock sleeve 16 during the whole process of mounting and dismounting the saw blade 20.

Preferably, one end of the movable seat 12, which is away from the tool body 30, is provided with a first circular arc-shaped protrusion 123, one end of the fixed seat 11, which is away from the tool body 30, is provided with a second circular arc-shaped protrusion 111, a circle center of the first circular arc-shaped protrusion 123, a circle center of the second circular arc-shaped protrusion 111, a circle center of the fixed seat 11, and a circle center of the movable seat 12 are located on the same axis, and a radius of the first circular arc-shaped protrusion 123 is smaller than a radius of the movable seat 12; the radius of the second arc-shaped protrusion 111 is smaller than that of the fixed seat 11; the sidewalls of the second arcuate projection 111 and the first arcuate projection 123 are engaged with the sidewall of the opening of the lock case 16. The first arcuate projection 123 and the second arcuate projection 111 limit the lock sleeve 16 in the radial direction thereof, but do not limit the reciprocating movement of the movable holder 12 in the mounting direction of the saw blade 20.

Referring to fig. 6, 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

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 fixed seat is connected with the tool body;

2. The chuck assembly as claimed in claim 1, wherein the movable seat is provided with at least one first positioning portion at an end thereof away from the tool body; the lock sleeve is provided with a second positioning part at least matched with the first positioning part.

3. The chuck assembly of claim 2, wherein the first locating feature is a boss and the second locating feature is a groove or a retaining hole.

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

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 chuck assembly as claimed in claim 1, wherein the cam surface has a slide rail along the axial direction of the lock sleeve, and the inner side wall of the lock sleeve has a guide groove, and the slide rail is connected to the guide groove.

7. The chuck assembly as claimed in claim 1, wherein the fixed seat has a sliding groove along a long side thereof, and the movable seat has a guide rail along a long side thereof; the guide rail is arranged in the sliding groove.

8. The chuck assembly of claim 1, wherein the movable seat is in contact with the fixed seat surface.

9. The chuck assembly of claim 1, wherein the end of the movable seat away from the tool body is provided with a first arcuate projection, and the end of the fixed seat away from the tool body is provided with a second arcuate projection; the circle center of the first arc-shaped bulge, the circle center of the second arc-shaped bulge, the circle center of the fixed seat and the circle center of the movable seat are positioned on the same axis, and the radius of the first arc-shaped bulge is smaller than that of the movable seat; the radius of the second arc-shaped bulge is smaller than that of the fixed seat; and the side walls of the first arc-shaped bulge and the second arc-shaped bulge are 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.