CN215238252U - Quick replacement chuck for saw blade of jig saw - Google Patents

Abstract

The utility model discloses the condition that the saw blade can appear rocking when installing thin saw blade to the saw blade quick replacement chuck of the sweep saw among the prior art, has provided a saw blade quick replacement chuck of sweep saw belongs to electric tool technical field, including reciprocating lever and lock sleeve, be equipped with the cavity in the reciprocating lever, be equipped with the pressure spring in the cavity, the bottom at the cavity is supported to the one end of pressure spring, the other end tip of pressure spring is equipped with can be at gliding position sleeve in the cavity, is equipped with the first constant head tank of installation saw blade handle tip on the one end terminal surface of the reverse pressure spring of position sleeve, the symmetry is equipped with the second constant head tank of installation saw blade handle shoulder on the one end tip that the reciprocating lever inserted the lock sleeve, be equipped with the spanner of convenient rotatory lock sleeve on the outer wall of lock sleeve, be equipped with the torsional spring that resets in the lock sleeve. The utility model discloses a can be with the more firm of saw blade installation, the condition of rocking about avoiding appearing takes place.

Description

Quick replacement chuck for saw blade of jig saw

Technical Field

The utility model belongs to the technical field of electric tool, concretely relates to jig saw blade quick replacement chuck.

Background

Current sweep-saw quick replacement chuck is CN 169581, and the patent of the quick chuck of electronic sweep-saw of patent name, folder, lock sleeve torsional spring that resets, its characterized in that: the lock sleeve and the clamping piece are provided with matched reset screwing threads, a pressure spring is arranged in a clamping piece cavity, a positioning pressing piece which is positioned in the clamping piece cavity in a sliding mode is arranged in front of the pressure spring, and the front end of the positioning pressing piece is provided with a knife saw end positioning groove. Because the specification thickness of saw blade has the multiple, and the multiple saw blade of many adaptations need to be taken place to the quick replacement chuck of jig saw, and the condition that rocks can hardly appear after some thin saw blades are installed, influences the use of jig saw.

Disclosure of Invention

The utility model discloses the condition that the saw blade can appear rocking when the saw blade quick replacement chuck installation thin saw blade to the sweep saw among the prior art, provided a sweep saw blade quick replacement chuck.

The invention aims to be realized by the following technical scheme: a quick replacement chuck for saw blades of a jig saw comprises a cylindrical reciprocating rod and a lock sleeve, wherein one end of the reciprocating rod is inserted into the lock sleeve, the lock sleeve can rotate relative to the reciprocating rod, a cavity is formed in the reciprocating rod, a pressure spring is arranged in the cavity, one end of the pressure spring abuts against the bottom of the cavity, a positioning sleeve capable of sliding in the cavity is arranged at the end part of the other end of the pressure spring, a first positioning groove for mounting the end part of a saw blade handle is formed in the end face of one end, opposite to the pressure spring, of the positioning sleeve, a second positioning groove for mounting a shoulder part of the saw blade handle is symmetrically formed in the end part, inserted into the lock sleeve, of the reciprocating rod, two round holes perpendicular to the grooving direction of the positioning grooves are formed in the reciprocating rod and are symmetrically arranged, and a steel ball is mounted in each round hole; the outer wall of the upper end of the lock sleeve is provided with a wrench which is convenient for rotating the lock sleeve, a reset torsion spring is arranged in the lock sleeve, a first step, a second step and a third step are sequentially arranged in the lock sleeve from the lower end to the upper end, the end face, inserted into the lock sleeve, of the reciprocating rod abuts against the first step, and the steel ball is just positioned on the second step.

Among the above-mentioned scheme, the tip of the saw blade handle of saw blade is installed in first constant head tank, saw blade handle shoulder is installed in the second constant head tank, the position of the relative lock sleeve of second constant head tank position is unchangeable, and the second constant head tank is located the terminal surface of reciprocating lever, this terminal surface of reciprocating lever supports on first step, the tip that the saw blade handle shoulder of saw blade is close to the sawtooth direction of saw blade also supports and leans on first step promptly, the both ends of saw blade handle shoulder have all carried on spacingly, guaranteed that the saw blade is firm in the installation always with reciprocating lever in service. The steel ball is arranged on the section of the reciprocating rod inserted into the lock sleeve, so that the rotation is more labor-saving.

Preferably, the first step is two ring-shaped first step pieces symmetrically arranged, the second step is two ring-shaped second step pieces symmetrically arranged, the third step is two ring-shaped third step pieces symmetrically arranged, a gap is reserved between the first step pieces and the second step pieces, the third step pieces are located between the radial end faces of the two adjacent second step pieces, the upper end face of each third step piece is higher than the upper end face of each second step piece, the lower end face of each first step piece is flush with the lower end face of the lock sleeve, and a gap formed between the radial end faces of the two first step pieces forms a slot for mounting the saw blade. The space between the first step piece and the second step piece forms a space in which the shoulder part of the saw blade handle of the saw blade can rotate in the lock sleeve, and the combined structure of the second step piece and the third step piece limits that the steel ball can only roll and move in the second step piece.

Preferably, the second positioning groove and the slot are distributed in a staggered mode, when the lock sleeve rotates in place, the slot can be parallel to the second positioning groove, and the angle of the lock sleeve rotating in place is equal to the angle of the steel ball rolling to the other end of the second step surface in the radial direction. When needs insert the saw blade, need rotate the lock tube, when the lock tube rotates and can not rotate, the slot just is parallel with the second constant head tank, inserts the saw blade at this moment, and the saw blade handle shoulder that distributes on saw blade both sides just inserts the second constant head tank along the slot in, when the release lock tube, the lock tube because the effect of torsional spring that resets can rotate the position with the dislocation of second constant head tank voluntarily, closed the passageway that the saw blade handle shoulder of saw blade can come in and go out the lock tube.

Preferably, the first step is formed with a step surface formed by a thin and thick end surface and a middle part of the first step in a clockwise direction. The shoulder of the saw blade handle of the saw blade can be more tightly arranged in the second positioning groove.

Preferably, the positioning sleeve is provided with a waist-shaped through hole, and the waist-shaped through hole is provided with a positioning pin which penetrates through the waist-shaped through hole and is fixed on the reciprocating rod. The moving displacement of the positioning sleeve in the reciprocating rod is limited.

Preferably, the depth of the second positioning groove is matched with the length of the shoulder of the saw blade handle along the length direction of the saw blade handle, and the bottom of the second positioning groove is concave inwards to form a V-shaped groove. The V type groove can adapt to the installation of the saw blade of different model specifications, and the thinner saw blade, the deeper the second constant head tank can be installed into to the saw blade handle shoulder of saw blade, has guaranteed that the emergence of the condition that rocks about in use can not appear after the saw blade installation.

Preferably, the wrench is provided with a groove, one end of the reset torsion spring penetrates into the reciprocating rod, and the other end of the reset torsion spring is installed in the groove.

Preferably, the reciprocating rod is further provided with a mounting plate on the rod body close to the second positioning groove, a circle of mounting holes which are sunken from the inner wall to the outer wall of the lock sleeve is formed in the upper end of the lock sleeve, the mounting plate is mounted in the lock sleeve, the lower end of the mounting plate is pressed at the upper end of the reset torsion spring, a hole retainer ring is mounted in the mounting groove, and the lower end face of the mounting hole is pressed on the upper end face of the mounting plate.

Preferably, the lock sleeve is hollow, and the diameter of the upper end of the lock sleeve is larger than that of the lower end of the lock sleeve.

Preferably, the circular hole is located between the mounting plate and the second positioning groove.

Compared with the prior art, the utility model discloses following beneficial effect has: the steel ball is arranged on the section of the reciprocating rod inserted into the lock sleeve, so that the rotation is more labor-saving; the bottom indent of second constant head tank forms V type groove, can be more firm with the saw blade installation, and the condition of rocking about avoiding appearing takes place.

Drawings

Fig. 1 is a schematic structural view of the utility model;

fig. 2 is an exploded view of the structure of the utility model;

fig. 3 is a schematic view of the internal structure of the utility model;

fig. 4 is a schematic view of the internal structure of another angle of the utility model;

fig. 5 is a schematic structural view of the lock sleeve.

The labels in the figure are: 1. A reciprocating lever; 2. a saw blade; 21. a blade handle; 22. a saw blade handle shoulder; 3. a lock sleeve; 4. a wrench; 41. a groove; 5. a cavity; 6. a pressure spring; 7. a positioning sleeve; 71. a kidney-shaped through hole; 72. positioning pins; 8. a first positioning groove; 9. a second positioning groove; 10. a circular hole; 11. steel balls; 12. a return torsion spring; 13. a first step piece; 14. a second step piece; 15. A third step piece; 16. a slot; 17. mounting a plate; 18. mounting holes; 19. a retainer ring for a bore.

Detailed Description

The invention will be further described with reference to the embodiments shown in the drawings to which:

example 1

As shown in fig. 1 to 5, a quick replacement chuck for saw blade of jig saw comprises a cylindrical reciprocating rod 1 and a lock sleeve 3, the lock sleeve 3 is inserted into one end of the reciprocating rod 1, the lock sleeve 3 can rotate relative to the reciprocating rod 1, a cavity 5 is arranged in the reciprocating rod 1, a pressure spring 6 is arranged in the cavity 5, one end of the pressure spring 6 is supported at the bottom of the cavity 5, the other end of the pressure spring 6 is provided with a positioning sleeve 7 capable of sliding in the cavity 5, a waist-shaped through hole 71 is formed in the positioning sleeve 7, and a positioning pin 72 which penetrates through the waist-shaped through hole 71 and is fixed on the reciprocating rod 1 is arranged on the waist-shaped through hole 71. The utility model discloses a saw blade handle of saw blade, including the location cover 7, the one end terminal surface of reverse pressure spring 6 of location cover is equipped with the first constant head tank 8 of installation saw blade handle 21 tip, the symmetry is equipped with the second constant head tank 9 of installation saw blade handle shoulder 22 on the one end tip that reciprocating lever 1 inserted lock sleeve 3, the degree of depth and the saw blade handle shoulder 22 of second constant head tank 9 cooperate along the length of 21 length direction of saw blade handle, the concave V type groove that forms in the bottom of second constant head tank 9. The reciprocating rod 1 is provided with two round holes 10 perpendicular to the slotting direction of the positioning groove, the two round holes 10 are symmetrically arranged, and a steel ball 11 is respectively arranged in each round hole 10; the inside cavity of lock tube 3, and the upper end diameter of lock tube 3 is greater than the lower extreme diameter of lock tube 3. Be equipped with the spanner 4 of convenient rotatory lock sleeve 3 on the outer wall of lock sleeve 3 upper end, be equipped with reset torsion spring 12 in the lock sleeve 3, be equipped with a recess 41 on the spanner 4, in the one end of reset torsion spring 12 penetrated reciprocating lever 1, the other end of reset torsion spring 12 was installed in recess 41. The inside mounting hole 18 that is equipped with the round from the inner wall of lock tube 3 to the outer wall depression in upper end of lock tube 3, the pole body that the double-layer bar is close to second constant head tank 9 still is equipped with mounting panel 17, in mounting panel 17 installs into lock tube 3, the lower extreme of mounting panel 17 presses in the upper end of reset torsion spring 12, install hole retaining ring 19 in the mounting groove, the lower terminal surface of mounting hole 18 presses on the up end of mounting panel 17. First step, second step, third step are equipped with in proper order from the lower extreme to the upper end in the lock sleeve 3, first step is the cyclic annular first step piece 13 that two symmetries set up, the second step is the cyclic annular second step piece 14 that two symmetries set up, the third step is the cyclic annular third step piece 15 that two symmetries set up, the one end terminal surface of first step piece 13 forms the step face by thin thickening to the middle clockwise of first step piece 13. An interval is reserved between the first step piece 13 and the second step piece 14, the third step piece 15 is located between the radial end faces of the two adjacent second step pieces 14, the upper end face of the third step piece 15 is higher than the upper end face of the second step piece 14, the lower end face of the first step piece 13 is flush with the lower end face of the lock sleeve 3, and a gap formed between the radial end faces of the two first step pieces 13 forms a slot 16 for installing the saw blade 2. The second positioning groove 9 and the slot 16 are distributed in a staggered mode, when the lock sleeve 3 rotates to the right position, the slot 16 can be parallel to the second positioning groove 9, and the angle of the lock sleeve 3 rotating to the right position is equal to the angle of the steel ball 11 rolling to the other end of the second step surface in the radial direction. The end face of one end of the reciprocating rod 1, inserted into the lock sleeve 3, abuts against the first step, and the steel ball 11 is just positioned on the second step.

Need install into this utility model with the saw blade during, need with lock sleeve clockwise turning to the position, the steel ball on the reciprocating lever 1 rolls the other end from the one end of second step piece this moment, because the both ends of second step piece all receive blockking of third step piece, has injectd the steel ball and can only make a round trip to roll in the radial of second step piece. After the lock sleeve rotated to the position, the slot and the second constant head tank of lock sleeve were parallel, and the saw blade could get into the lock sleeve this moment, installed into the first constant head tank of position sleeve with the saw blade handle tip of saw blade, and position sleeve one end is supported on the pressure spring, and the position sleeve can remove along with the extrusion of saw blade handle tip to adapt to the difference of different saw blade handle length. The shoulder part of the saw blade handle is arranged in the second positioning groove, the lock sleeve is released after the saw blade handle is arranged, the lock sleeve can automatically rotate anticlockwise to the original position under the action of the reset torsion spring, and the steel ball rolls to the original end of the second step piece. Be equipped with clockwise by the step face of thin thickening on the first step piece, so when lock sleeve counter-clockwise turning, first step piece can be pushed the saw tooth end that saw blade handle shoulder is close to the saw blade to the second constant head tank, makes more firm of saw blade installation, and the V type groove structure on the bottom of second constant head tank, so no matter the thickness of saw blade 2 is thick a bit or thin a bit, as long as in the installation scope of this utility model, can all be with the very firm of saw blade 2 installation. When the saw blade 2 is taken out, the lock sleeve 3 only needs to be rotated clockwise to the position where the slot 16 is parallel to the second positioning groove 9, and the first positioning groove 8 can eject the saw blade 2 under the action of the pressure spring 6.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (10)

1. The utility model provides a saw blade quick replacement chuck of jigsaw, includes columniform reciprocating lever (1) and lock sleeve (3), lock sleeve (3) are inserted to the one end of reciprocating lever (1), lock sleeve (3) can rotate reciprocating lever (1) relatively, its characterized in that, be equipped with cavity (5) in reciprocating lever (1), be equipped with pressure spring (6) in cavity (5), the bottom at cavity (5) is supported to the one end of pressure spring (6), the other end tip of pressure spring (6) is equipped with can be at gliding position sleeve (7) in cavity (5), be equipped with first constant head tank (8) of installation saw blade handle (21) tip on the one end terminal surface of position sleeve (7) reverse pressure spring (6), reciprocating lever (1) inserts the one end tip of lock sleeve (3) and goes up the symmetry and is equipped with second constant head tank (9) of installation saw blade handle shoulder (22), be equipped with two round hole (10) of perpendicular to constant head tank direction on reciprocating lever (1), the two round holes (10) are symmetrically arranged, and a steel ball (11) is respectively arranged in each round hole (10); be equipped with spanner (4) of convenient rotatory lock sleeve (3) on the outer wall of lock sleeve (3) upper end, be equipped with reset torsion spring (12) in lock sleeve (3), be equipped with first step, second step, third step from the lower extreme to the upper end in proper order in lock sleeve (3), the one end terminal surface of the lock sleeve (3) of inserting of reciprocating lever (1) supports on first step, steel ball (11) just are located the second step.

2. The quick change chuck for jigsaw blades according to claim 1, wherein the first step is two symmetrically arranged annular first step pieces (13), the second step is two symmetrically arranged annular second step pieces (14), the third step is two symmetrically arranged annular third step pieces (15), a gap is left between the first step pieces (13) and the second step pieces (14), the third step pieces (15) are located between the radial end surfaces of the two adjacent second step pieces (14), the upper end surface of each third step piece (15) is higher than the upper end surface of the second step piece (14), the lower end surface of each first step piece (13) is flush with the lower end surface of the lock sleeve (3), and a gap formed between the radial end surfaces of the two first step pieces (13) forms a slot (16) for installing the saw blade (2).

3. The quick change chuck for jigsaw blades according to claim 1, wherein the second detents (9) are offset from the slots (16), and when the lock sleeve (3) is rotated into position, the slots (16) are parallel to the second detents (9), and the angle of rotation of the lock sleeve (3) into position is equal to the angle of radial rolling of the steel balls (11) at one end of the second step surface to the other end.

4. The quick change chuck for jigsaw blades according to claim 1, wherein the first step (13) is formed with a step surface by a thinning and thickening in a clockwise direction from an end surface of the first step (13) to a middle of the first step (13).

5. The quick change chuck for jigsaw blades according to claim 1, wherein the locating sleeve (7) is provided with a kidney-shaped through hole (71), and the kidney-shaped through hole (71) is provided with a locating pin (72) which passes through the kidney-shaped through hole (71) and is fixed on the reciprocating rod (1).

6. A jigsaw blade quick change cartridge according to claim 1, wherein the second detent (9) has a depth which matches the length of the blade shank shoulder (22) along the length of the blade shank (21), and the bottom of the second detent (9) is recessed to form a V-groove.

7. The quick change chuck for jigsaw blades according to claim 1, wherein the wrench (4) is provided with a recess (41), one end of the return torsion spring (12) is inserted into the reciprocating lever (1), and the other end of the return torsion spring (12) is mounted in the recess (41).

8. The quick-change chuck for jigsaw blades according to claim 1, wherein a mounting plate (17) is further arranged on the shaft of the reciprocating rod (1) near the second positioning groove (9), a circle of mounting hole (18) which is recessed from the inner wall to the outer wall of the lock sleeve (3) is formed inside the upper end of the lock sleeve (3), the mounting plate (17) is mounted in the lock sleeve (3), the lower end of the mounting plate (17) is pressed at the upper end of the reset torsion spring (12), a hole retainer ring (19) is mounted in the mounting hole, and the lower end face of the mounting hole (18) is pressed on the upper end face of the mounting plate (17).

9. A jigsaw blade quick change chuck according to claim 1, wherein the lock sleeve (3) is hollow inside and the diameter of the upper end of the lock sleeve (3) is larger than the diameter of the lower end of the lock sleeve (3).

10. A jigsaw blade quick change cartridge according to claim 1, wherein the circular hole (10) is located between the mounting plate (17) and the second detent (9).

Images