CN102059397B - Saw bit installation structure for reciprocating saw - Google Patents
Saw bit installation structure for reciprocating saw Download PDFInfo
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- CN102059397B CN102059397B CN 200910225346 CN200910225346A CN102059397B CN 102059397 B CN102059397 B CN 102059397B CN 200910225346 CN200910225346 CN 200910225346 CN 200910225346 A CN200910225346 A CN 200910225346A CN 102059397 B CN102059397 B CN 102059397B
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- 238000003825 pressing Methods 0.000 claims abstract description 144
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- 238000000034 method Methods 0.000 claims description 7
- 230000000994 depressogenic effect Effects 0.000 claims 3
- 230000006835 compression Effects 0.000 description 8
- 238000007906 compression Methods 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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Abstract
The invention provides a saw bit installation structure for a reciprocating saw, which comprises a saw bit, a reciprocating rod, a pressing block and a saw bit clamping device, wherein the saw bit is used for cutting workpieces; the reciprocating rod is provided with an accommodating hole and a through hole; the accommodating hole is formed at one end of the reciprocating rod and extends along the axial direction of the reciprocating rod; the through hole is vertically communicated with the accommodating hole; the pressing block is accommodated into the through hole; the saw bit clamping device allows the pressing block to have a first position and a second position operably; at the first position, the saw bit is clamped in the accommodating hole by the pressing block, and at the second position, the saw bit is released; a pressure bias device is arranged in the accommodating hole; and when the pressing block is at the second position, the pressure bias device applies a radial pressure to the pressing block, so that the pressing block is kept at the second position. Compared with the prior art, in the technical scheme of the invention, the saw bit can be replaced only by a single hand, so a convenience is brought to users.
Description
Technical Field
The present disclosure relates to reciprocating saws, and particularly to a saw blade mounting structure of a reciprocating saw.
Background
The reciprocating saw brings great convenience to the work and life of people, people can conveniently use the reciprocating saw to process wood and other devices, and the reciprocating saw is popular with users due to the characteristics of high cutting efficiency, time saving and labor saving.
The traditional reciprocating saw fixes the saw blade on the reciprocating rod through a screw, and the fixing mode is easy to loosen, so that the cutting is deviated, the expected cutting effect cannot be achieved, and the device to be cut is damaged. In addition, the fixing method is troublesome in replacing the saw blade, and requires a user to screw off the screws one by one, place a new saw blade at a preset position, and fix the saw blade with the screws. In the process, a user always needs to hold the saw blade with one hand and detach or install screws with the other hand, and the whole operation is troublesome and laborious.
Gradually, manufacturers have recognized the problem that a mounting structure of a saw blade is improved, and a user can remove the saw blade by rotating or pushing an on-off switch, however, in the existing mounting structure, no matter the saw blade is detached or mounted, the user needs to operate the on-off switch with one hand and remove or mount the saw blade with the other hand, which still needs to match both hands of the user well, so that the saw blade can be detached or mounted, and the operation is still complicated.
Disclosure of Invention
The invention provides a saw blade mounting structure of a reciprocating saw with a saw blade easy to disassemble and assemble.
In order to achieve the purpose, the technical scheme of the invention is as follows: a blade mounting structure of a reciprocating saw, comprising: a saw blade for cutting a workpiece; the reciprocating rod is provided with an accommodating hole and a through hole, the accommodating hole is arranged at one end of the reciprocating rod and extends along the axial direction of the reciprocating rod, and the through hole is vertically communicated with the accommodating hole; the pressing block is accommodated in the through hole; a blade clamping device operable to cause the pressing block to have a first position in which the pressing block clamps the blade in the receiving hole and a second position in which the blade is released, a biasing device being disposed in the receiving hole, the biasing device applying a radial pressure to the pressing block to maintain the pressing block in the second position when the pressing block is in the second position.
Preferably, the biasing device comprises a spring and a pressing part, and the spring is arranged between the pressing part and the pressing part
And when the pressing block is positioned at the first position, the pressing part applies pressure to the inclined plane.
Preferably, the pressing part is a steel ball.
Preferably, the saw blade clamping device comprises a rotating sleeve with an inner cam surface and a torsion spring, the rotating sleeve is matched with the pressing block through a cam, and the torsion spring provides torsion for the rotating sleeve to enable the pressing block to maintain the first position.
Preferably, the saw blade clamping device comprises a push key and a spring, the push key can slide relative to the reciprocating rod, an inward-concave inclined surface is arranged on the side facing the through hole and matched with the pressing block, and the spring provides elastic force for the push key to enable the pressing block to maintain the first position.
Preferably, the saw blade has a mounting hole, and a surface of the pressing block facing the receiving hole has a protrusion, and when the pressing block is in the first position, the protrusion is inserted into the mounting hole, and when the pressing block is in the second position, the protrusion can block the biasing device.
Preferably, a pressing surface is provided on the surface of the pressing block in the region surrounding the protrusion, and when the pressing block is in the second position, the biasing means applies pressure to the pressing surface to hold the pressing block in the second position.
Preferably, the through hole has a supporting portion at the opposite position of the hole wall, the pressing block has a concave portion at the opposite sides, the concave portions correspond to the supporting portions, and a pressure spring is arranged between the corresponding supporting portion and the concave portion, and can provide the pressing block with an elastic force in the direction away from the accommodating hole.
Preferably, the through holes are provided with a support part at the opposite positions of the hole walls, the pressing block is provided with a through hole, a U-shaped pressure spring penetrates through the through hole, the two ends of the U-shaped pressure spring are located on the support parts, and the U-shaped pressure spring provides the pressing block with elastic force in the direction away from the accommodating hole.
Preferably, the reciprocating rod is provided with the accommodating hole end, a retaining ring surrounded by a cylinder is embedded in the accommodating hole end, two ends of the retaining ring extend towards the inside of the accommodating hole end to form extension parts respectively, a crack is formed between the two extension parts, and the saw blade can enter the groove through the crack.
Compared with the prior art, the saw blade mounting structure of the reciprocating saw realizes the replacement of the saw blade by one hand through the mutual matching of the biasing device, the pressing block and the saw blade clamping device. When the saw blade is disassembled, the saw blade clamping device is operated to enable the pressing block to be located at the second position, a user can take down the saw blade, at the moment, the biasing device can apply radial pressure to the pressing block to enable the pressing block to be kept at the second position, so that the pressing block cannot be pressed down, when the user installs the saw blade, the saw blade is only required to be inserted into the groove, the biasing device is pushed away from a pressing area between the pressing block and the containing hole, the saw blade can be clamped tightly, the saw blade installation is completed at the moment, other operations are not required, the whole disassembling and installing process can be completed only by one hand, and great convenience is brought to the user.
Drawings
The invention is further described with reference to the following figures and embodiments.
FIG. 1 is an exploded perspective view of a saw blade mounting structure of a reciprocating saw according to a first embodiment of the present invention;
FIG. 2 is a cross-sectional view of the blade mounting structure of the reciprocating saw of FIG. 1;
FIG. 3 is a cross-sectional view of the blade mounting structure of the reciprocating saw of FIG. 2 taken along line B-B;
FIG. 4 is a cross-sectional view of the blade mounting structure of the reciprocating saw of FIG. 1 shown releasing the saw blade;
FIG. 5 is a plan view of a retaining ring of the blade mounting structure of the reciprocating saw of FIG. 1;
FIG. 6 is an exploded perspective view of a saw blade mounting structure of a reciprocating saw according to a second embodiment of the present invention;
FIG. 7 is a cross-sectional view of the blade mounting structure of the reciprocating saw of FIG. 6;
FIG. 8 is a cross-sectional view of the blade mounting structure of the reciprocating saw of FIG. 7 taken along line C-C;
FIG. 9 is a cross-sectional view of a blade mounting structure of a reciprocating saw provided in accordance with a third embodiment of the present invention;
FIG. 10 is a cross-sectional view of the blade mounting structure of the reciprocating saw of FIG. 9 taken along line D-D;
FIG. 11 is an exploded perspective view of a saw blade mounting structure of a reciprocating saw according to a fourth embodiment of the present invention;
FIG. 12 is a cross-sectional view of the blade mounting structure of the reciprocating saw of FIG. 11;
FIG. 13 is a cross-sectional view of the blade mounting structure of the reciprocating saw of FIG. 12 taken along line E-E.
Wherein,
100. saw blade mounting structure 20, pressing block 32 and steel ball
10. Reciprocating lever 21, rotating shaft 40, saw blade clamping device
11. Accommodating hole 22, object block 41, torsion spring
12. First side wall 23, projection 42, rotary sleeve
13. Second side wall 24, strip groove 44, inner cam surface
14. Through hole 25, inclined plane 45, starting end
15. End surface 26, pressing surface 46, tail end
16. Cylindrical hole 30, biasing device 50, gasket
17. Hole bottom 31, spring 60 and block diagram
61A, extension 130, biasing device 311, receiving hole
61B, extension 131, spring 313, second sidewall
70. Saw blade 133, push block 314 and through hole
71. Mounting hole 140, blade clamping device 320, press block
200. Saw blade mounting structure 141, torsional spring 322, object block
110. Reciprocating lever 142, rotating sleeve 326 and pressing surface
111. Receiving hole 300, saw blade mounting structure 327, steel ball
114. Through hole 210 reciprocating rod 328 recess
117. Bottom 211, receiving cavity 330, biasing means
118. Pressure spring 214, through hole 331, spring
119A, support 219A, 332 support 332 steel ball
119b, support 219b, 340, blade clamp
120. Press block 220, press block 341, spring
121. Rotating shaft 222, object block 347 push key
122. Mass 228, through hole 348, compression end
123. Projection 229. U-shaped compression spring 349. Release end
129a, recess 400, blade mounting structure 370, blade
129B, recess 310, reciprocating lever
Detailed Description
Referring to fig. 1, a saw blade mounting structure 100 of a reciprocating saw according to a first embodiment of the present invention is shown in an exploded perspective view, wherein the saw blade mounting structure 100 is capable of fastening a saw blade 70 to the reciprocating saw. The saw blade clamping device comprises a reciprocating rod 10, a pressing block 20, a biasing device 30 and a saw blade clamping device 40, wherein one end of the reciprocating rod 10 is provided with a containing hole 11, the pressing block 20 is arranged on the side wall of the containing hole 11, the biasing device 30 is arranged in the containing hole 11, and the saw blade clamping device is sleeved on the reciprocating rod 10 and can apply pressure to the pressing block 20.
Referring to fig. 1 and 2 together, fig. 2 is a cross-sectional view of a blade mounting structure 100 of the reciprocating saw of fig. 1 taken along an axial direction of the reciprocating rod 10. The reciprocating rod 10 has two opposite ends, one end of the reciprocating rod is used for matching with a power system of the reciprocating saw, and the end surface 15 of the other end of the reciprocating rod is provided with the accommodating hole 11. The receiving hole 11 extends along an axial direction of the reciprocating rod 10 and can receive a portion of the saw blade 70 for mounting.
The radial cross section of the receiving hole 11 is rectangular, and has a first side wall 12 and a second side wall 13 opposite to each other. The first side wall 12 and the second side wall 13 are close to the central area of the bottom 17 of the receiving hole 11, and the opposite positions thereof respectively form a semi-cylindrical recess, so that the two recesses enclose a cylindrical hole 16 for receiving the biasing device 30. The first sidewall 12 is provided with a through hole 14, the extending direction of which is perpendicular to the first sidewall 12, and the through hole 14 is vertically communicated with the accommodating hole 11 and is used for accommodating the pressing block 20.
The blade clamping device 40 can press the pressing block 20 to fasten the saw blade 70 in the receiving hole 11, and can be operated to cooperate with the pressing block 20 to release the saw blade 70.
In this embodiment, the blade clamping device 40 includes a torsion spring 41 and a swivel sleeve 42 having an internal cam surface 44. The torsion spring 41 and the rotating sleeve 42 are coaxially arranged and sleeved at one end of the reciprocating rod 10 close to the end face 15. The inner cam surface 44 is used for cam-fitting with the pressing block 20, and has a starting end 45 far away from the axial center of the reciprocating rod 10 and a tail end 46 near the axial center of the reciprocating rod 10. The torsion spring 41 provides torsion to the swivel sleeve 42 from the trailing end 46 to the leading end 45.
The pressing block 20 is accommodated in the through hole 14 and has a first position and a second position, when the pressing block is in the first position, the pressing block can clamp the saw blade 70 in the accommodating hole 11, and when the pressing block is in the second position, the saw blade 70 is released.
In the present embodiment, the pressing block 20 includes a rotating shaft 21 and an object 22. The shaft 21 is a cylindrical rod, and when the blade clamp 40 is rotated, the shaft 21 is able to rotate relative to the inner cam surface 44 and the mass 22. The surface of the object 22 far from the receiving hole 11 is provided with a strip-shaped groove 24, which is used for matching with the rotating shaft 21, so that the rotating shaft 21 is partially located in the strip-shaped groove 24, and when the rotating shaft 21 rotates, the rotating shaft cannot be separated from the strip-shaped groove 24, thereby realizing the limitation of the position of the rotating shaft 21. The rotating shaft 21 is arranged to make the cooperation between the pressing block 20 and the saw blade clamping device 40 smoother.
The surface of the block 22 facing the receiving hole 11 is provided with a protrusion 23 for cooperating with the mounting hole 71 of the saw blade 70 to define the position of the saw blade 70 and the position of the biasing means 30 when the saw blade mounting structure 100 releases the saw blade 70. The area of the surface surrounding the protrusion 23 is a pressing surface 26 for applying pressure to the saw blade 70 to tighten it between the pressing surface 26 and the second side wall 13 when the saw blade mounting structure 100 tightens the saw blade 70.
The surface of the protrusion 23 close to the bottom 17 is provided with a slope 25, preferably, the intersection line of the slope 25 and the surface is perpendicular to the axial direction of the reciprocating rod 10. When the saw blade mounting structure 100 fastens the saw blade 70, the biasing device 30 abuts against the inclined surface 25, and applies a force to the block 22 in a direction away from the receiving hole 11 through the inclined surface 25.
It is understood that the rotating shaft 21 may be an integral structure with the mass 22, and a rib is disposed on the surface of the mass 22 opposite to the receiving hole 11, or those skilled in the art may design the pressing block 20 into other structures without creative efforts, but the invention is covered within the protection scope as long as the structure and the function of the pressing block are the same as or similar to the invention.
Referring to fig. 3 and 4 together, fig. 3 is a sectional view of the saw blade mounting structure 100 of fig. 2 taken along a line B-B, and fig. 4 is a sectional view of the saw blade mounting structure 100 taken along an axial direction of the reciprocating rod 10 when the saw blade 70 is released.
When the saw blade 70 is removed, the user rotates the rotating sleeve 42 in the direction from the starting end 45 to the tail end 46, and the pressing block 20 moves in the direction away from the receiving hole 11 under the action of the biasing device 30 because the starting end 46 of the inner cam surface 44 is relatively away from the axial center of the reciprocating rod 10 until the saw blade 70 is ejected by the biasing device 30, so that the user finishes the operation of removing the saw blade 70. The biasing device 30 will abut against the pressing surface 26 and the second sidewall 13 of the receiving hole 11, so as to apply radial pressure to the pressing surface 26, and the rotating sleeve 42 cannot press the pressing block 20 into the through hole 14 under the torque force provided by the torsion spring 41, and at this time, the position of the pressing block 20 is the second position.
Referring to fig. 3, when the saw blade 70 is inserted into the receiving hole 11, the biasing device 30 is pushed away from between the pressing surface 26 and the second side wall 13 of the receiving hole 11, and at this time, the rotating sleeve 42 rotates relative to the reciprocating rod 10 along the direction from the tail end 46 to the start end 45 under the torsion of the torsion spring 41. Since the tail end 46 is closer to the axial center of the reciprocating rod 10 than the start end 45, the pressing block 20 is pressed by the inner cam surface 44, and the pressing block 20 moves toward the receiving hole 11 until the saw blade 70 is tightly clamped between the pressing surface 26 and the second sidewall 13 of the receiving hole 11, at which time the position of the pressing block 20 is the first position.
Please refer to fig. 1 and fig. 2 together. The biasing device 30 is received in the receiving hole 11 and includes a spring 31 and a pressing portion. The spring 31 is disposed between the pressing portion and the bottom 17 of the accommodating hole 11. When the pressing block 20 is at the first position, the pressing part abuts against the inclined surface 25 of the object block 22 to apply pressure to the inclined surface 25, so that when the saw blade 70 is detached, the pressing block 20 moves in a direction away from the accommodating hole 11. When the pressing block 20 is in the second position, the pressing part is pressed between the pressing surface 26 and the second side wall 13, so that radial pressure perpendicular to the axial direction of the reciprocating rod 10 is applied to the pressing surface 26, and the pressing block 20 is kept in the second position.
In this embodiment, the biasing means 30 comprises a spring 31 and a steel ball 32. The spring 31 is located between the steel ball 32 and the bottom 17 of the receiving hole 11, and is capable of providing an elastic force to the steel ball 32.
When the pressing block 20 is in the first position, the steel ball 32 abuts against the inclined surface 25 of the block 22, and at this time, the elastic force provided by the spring 31 to the steel ball 32 is applied to the inclined surface 25, so that the block 22 receives a force to move in a direction away from the receiving hole 11, but the force applied by the steel ball 32 to the block 22 is smaller than the pressure applied by the saw blade clamping device 40 to the pressing block 20.
When the saw blade 70 is released, the pressing block 20 moves away from the receiving hole 11 under the action of the force applied by the steel ball 32 until reaching the second position, thereby releasing the saw blade 70. At this time, the steel ball 32 will push out the saw blade 70 and will be blocked by the protrusion 23 of the block 22 to prevent it from being separated from the cylindrical hole 16, and the steel ball 32 is clamped between the pressing surface 26 of the block 22 and the second side wall 13 of the receiving hole 11, so as to press the block 22 and keep it at the second position.
It is understood that the biasing device 30 can be configured in other configurations, such as replacing the spring 31 with other elastic materials, or replacing the steel ball 32 with other shapes or materials, such as a cylinder, a cube, etc., and materials such as copper ball, iron ball, glass ball, etc., as long as the functions and effects thereof are the same or similar to the present invention, and are within the scope of the present invention.
The blade mounting structure 100 further has a retainer ring 60 embedded in the side wall of the reciprocating rod 10 between the blade clamping device 40 and the end surface 15 for retaining the blade clamping device 40 from being separated from the reciprocating rod 10.
In the present embodiment, please refer to fig. 5, which is a plan view of the retainer ring 60. The retainer ring 60 is a wire loop with a circular cross section. The two ends of the retainer ring 60 extend towards the inside of the retainer ring to form an extension part 61A and an extension part 61B, respectively, a gap is formed between the extension part 61A and the extension part 61B, through which the saw blade can enter the receiving hole 11, and when the saw blade 70 is disassembled, the biasing device 30 ejects the saw blade 70 and is clamped by the gap to prevent the saw blade 70 from flying off the saw blade mounting structure 100 to cause injury to a user.
It is understood that the retainer ring 60 may be made of other materials such as copper, iron, etc., and the cross section thereof may be designed into other shapes such as a triangle, a quadrangle, etc., and a star, etc., and the overall structure and function thereof are the same or similar to the present invention, and are all covered by the present invention.
It will be appreciated that to alleviate friction between the retainer ring 60 and the swivel sleeve 42, a spacer 50 may be provided therebetween, which may extend the useful life.
Through the saw blade mounting structure 100 that the first embodiment provided, the user is dismantling during the saw blade 70, rotate change the cover 42, saw blade 70 just can pop out a segment length, and press from both sides in on the retaining ring 60, only need in the same place take out it can, and the installation during saw blade 70, need not to rotate once more change the cover, only need with saw blade 70 inserts accommodate hole 11, thereby will steel ball 32 pushes away from the compact surface 24 region of thing piece 22, saw blade mounting structure 100 can be automatic with saw blade 70 fastens, thereby realizes whole dismantlement and installation in-process, only need a hand alright change the saw blade, has brought very big facility for the user.
Please refer to fig. 6, which is an exploded perspective view of a blade mounting structure 200 of a reciprocating saw according to a second embodiment of the present invention. Which includes a reciprocating lever 110, a pressing block 120, a biasing means 130, and a blade clamping means 140 consisting of a torsion spring 141 and a rotating sleeve 142.
Referring to fig. 7 and 8 together, fig. 7 is a sectional view of the blade mounting structure 200 along the axial direction of the reciprocating rod 110, and fig. 8 is a sectional view of the blade mounting structure 200 along the line C-C of fig. 7. The structure of the blade mounting structure 200 is substantially the same as the structure of the blade mounting structure 100 provided in the first embodiment, except that: a support portion 119A and a support portion 119B are respectively formed in the reciprocating rod 110 at positions opposite to the hole wall of the through hole 114. The pressing block 120 includes a rotating shaft 121 and an object 122, two opposite sides of the object 122 respectively have a recess 129A and a recess 129B, which respectively correspond to the supporting portion 119A and the supporting portion 119B, and a compression spring 118 is respectively disposed between the supporting portion 119A and the recess 129A and between the supporting portion 119B and the recess 129B, so that a force is provided to the pressing block 120 in a direction away from the receiving hole 111 of the reciprocating rod 110 by the compression spring 118, but the force is smaller than a pressure applied to the pressing block 120 by the saw blade clamping device 140.
It is understood that the surface of the block 122 facing the receiving hole 111 is provided with a protrusion 123, and other areas of the surface surrounding the protrusion 123 may be a plane, or the surface configuration of the protrusion 23 may be provided for the block 22 in the first embodiment.
Referring to fig. 6 and 7, in the present embodiment, the biasing device 130 includes a spring 131 and a pushing block 133. The pushing block 133 is a cylinder with a closed end, and is sleeved on an end of the spring 131 far away from the bottom 117 of the accommodating hole 111. When the pressing block 120 is in the first position, the pushing block 133 is pressed against the surface of the pressing block 120 facing the bottom of the accommodating hole 111.
It is understood that the pushing block 133 may be provided in other shapes, such as a square cylinder or a cylinder with a cross section having other polygonal shapes, which may be replaced by a steel ball.
Referring to fig. 9 and 10 together, fig. 9 is an exploded perspective view of a blade mounting structure 300 of a reciprocating saw according to a third embodiment of the present invention, and fig. 10 is a cross-sectional view of the blade mounting structure 300 along a line D-D.
The blade mounting structure 300 is substantially the same as the blade mounting structure 200 provided in the second embodiment of the present invention, except that: a supporting part 219A and a supporting part 219B are respectively formed at opposite positions of the hole wall of the through hole 214 of the reciprocating rod 210 of the blade mounting structure 300 in a concave manner, and the pressing block 220 of the blade mounting structure 200 includes a mass 222 and a U-shaped compression spring 229. A through hole 228 is formed in the block 222 at a position corresponding to the support portions 219A and 219B, a U-shaped compression spring 229 passes through the through hole 228, and both ends of the U-shaped compression spring 229 are respectively positioned on the support portions 219A and 219B, and the U-shaped compression spring 229 provides an elastic force to the pressing block 220 in a direction away from the receiving hole 211 of the reciprocating rod 210.
Referring to fig. 11, there is shown an exploded perspective view of a saw blade mounting structure 400 of a reciprocating saw according to a fourth embodiment of the present invention. The blade mounting structure 400 includes a reciprocating rod 310 having a receiving hole 311 at one end, a pressing block 320, a biasing device 330, and a blade pressing device 340. The biasing device 330 is composed of a spring 331 and a steel ball 332.
The structure of the blade mounting structure 400 is substantially the same as that of the blade mounting structure 100 provided in the first embodiment, except that: the pressing block comprises a steel ball 327 and a block 322, a semi-circular arc-shaped recess 328 is arranged in the central area of the surface of the block 322, which is opposite to the containing hole 311, the steel ball 327 is partially contained in the recess 328, and the part of the steel ball 328 exposed out of the recess 328 is used for being matched with the saw blade clamping device 340.
Referring to fig. 11, 12 and 13 together, fig. 12 is a cross-sectional view of the blade mounting structure 400 along an axial direction, and fig. 13 is a cross-sectional view of the blade mounting structure 400 of fig. 12 along a line E-E.
The blade clamping device 340 includes a spring 341 and an annular push key 347, the spring 341 and the push key 347 are coaxially disposed and sleeved at an end near the receiving hole 311 of the reciprocating rod 310, the push key 347 covers the through hole 314 of the reciprocating rod 310, and the surface facing the reciprocating rod 310 is a concave inclined surface for matching with the steel ball 327 of the pressing block 320, so that the steel ball 327 can relatively rotate between the inclined surface and the recess 328 of the block 322. The inclined plane has a pressing end 348 and a releasing end 349, and the vertical distance from the pressing end 348 to the axial center of the reciprocating rod 310 is smaller than the vertical distance from the releasing end 349 to the axial center of the reciprocating rod 310. The spring 341 provides the pushing key 347 with a spring force from the pressing end 348 to the releasing end 349.
When the saw blade 370 is removed, the user pushes the push key 347 along the direction from the releasing end 349 to the pressing end 348, and the pressing block 320 moves along the direction away from the receiving hole 311 under the action of the biasing device 330 because the releasing end 349 of the inclined surface is relatively far away from the axial center of the reciprocating rod 310, until the saw blade 370 is ejected out by the biasing device 330, so that the user finishes the operation of removing the saw blade 370. The steel ball 332 of the biasing device 330 abuts between the pressing surface 326 of the pressing block 320 and the second side wall 313 of the receiving hole 311, and the push key 347 cannot press the pressing block 320 into the through hole 314 under the elastic force provided by the spring 341, at this time, the position of the pressing block 320 is the second position thereof.
When the saw blade 370 is received in the receiving hole 311, the biasing device 330 is pushed away from between the pressing surface 326 of the pressing block 320 and the second side wall 313. At this time, the push key 347 slides along the reciprocating rod 310 from the pressing end 348 to the releasing end 349 under the elastic force of the spring 341. Since the pressing end 348 is relatively close to the axial center of the reciprocating rod 310, the pressing block 320 is pressed by the inclined surface and moves toward the receiving hole 311 until the saw blade 370 is tightly clamped between the pressing surface 326 of the pressing block 320 and the second side wall 313 of the receiving hole 311, and at this time, the pressing block 320 is located at the first position.
It is understood that the releasing end 349 of the push key 347 can be designed to have a corresponding arc to the steel ball 327 so as to better fit the steel ball 327.
It is understood that the mass 322 may also adopt the structure of providing the mass with a force in a direction away from the receiving hole by providing a spring in the second embodiment and the third embodiment, and the corresponding biasing device 330 may also adopt the structure of the elastic device in the second embodiment.
Compared with the prior art, the saw blade mounting structure of the reciprocating saw realizes the replacement of the saw blade by one hand through the mutual matching of the biasing device, the pressing block and the saw blade clamping device. When the saw blade is disassembled, the saw blade clamping device is operated to enable the pressing block to be located at the second position, a user can take down the saw blade, at the moment, the biasing device can apply radial pressure to the pressing block to enable the pressing block to be kept at the second position, so that the pressing block cannot be pressed down, when the user installs the saw blade, the saw blade is only required to be inserted into the groove, the biasing device is pushed away from a pressing area between the pressing block and the containing hole, the saw blade can be clamped tightly, the saw blade installation is completed at the moment, other operations are not required, the whole disassembling and installing process can be completed only by one hand, and great convenience is brought to the user.
It will be appreciated by those skilled in the art that the specific structure of the blade mounting structure of the reciprocating saw of the present invention can be varied, but the main technical features of the technical solution adopted by the saw are the same as or similar to those of the present invention, and all the features are covered by the present invention.
Claims (9)
1. A blade mounting structure of a reciprocating saw, comprising:
a saw blade for cutting a workpiece;
the reciprocating rod is provided with an accommodating hole and a through hole, the accommodating hole is arranged at one end of the reciprocating rod and extends along the axial direction of the reciprocating rod, and the through hole is vertically communicated with the accommodating hole;
the pressing block is accommodated in the through hole;
a saw blade clamping device operable to cause the pressing block to have a first position and a second position, the first position being that the pressing block clamps the saw blade in the receiving hole, the second position being that the saw blade is released;
the method is characterized in that: the pressure applying device comprises a spring and a pressing part, the spring is arranged between the pressing part and the bottom of the accommodating hole, the surface of the pressing block facing the accommodating hole is provided with an inclined surface, and when the pressing block is at the first position, the pressing part abuts against the inclined surface and applies pressure to the inclined surface.
2. The saw blade mounting structure of the reciprocating saw as claimed in claim 1, wherein: the pressing part is a steel ball.
3. The saw blade mounting structure of the reciprocating saw as claimed in claim 1, wherein: the saw blade clamping device comprises a rotating sleeve and a torsion spring, wherein the rotating sleeve is provided with an inner cam surface, the rotating sleeve is matched with the pressing block through a cam, and the torsion spring provides torsion for the rotating sleeve to keep the pressing block at the first position.
4. The saw blade mounting structure of the reciprocating saw as claimed in claim 1, wherein: the saw blade clamping device comprises a push key and a spring, the push key can slide relative to the reciprocating rod, an inwards concave inclined plane is arranged on the side of the through hole and matched with the pressing block, and the spring provides elastic force for the push key to enable the pressing block to be kept at the first position.
5. The blade mounting structure of a reciprocating saw as claimed in any one of claims 1, 2, 3 and 4, wherein: the saw blade is provided with a mounting hole, the surface of the pressing block facing the accommodating hole is provided with a protrusion, when the pressing block is located at the first position, the protrusion is inserted into the mounting hole, and when the pressing block is located at the second position, the protrusion can block the biasing device.
6. The blade mounting structure of the reciprocating saw as set forth in claim 5, wherein: a pressing surface is provided on the surface of the pressing block in the area surrounding the bulge, and when the pressing block is in the second position, the biasing device applies pressure to the pressing surface to keep the pressing block in the second position.
7. The blade mounting structure of a reciprocating saw as claimed in any one of claims 1, 2, 3 and 4, wherein: the hole wall relative position of through-hole has a supporting part respectively, the relative both sides of briquetting have a depressed part respectively, the depressed part respectively with the supporting part is corresponding, and is corresponding the supporting part with between the depressed part, be provided with a pressure spring respectively, it can provide the briquetting keeps away from the elasticity of accepting the hole direction.
8. The blade mounting structure of a reciprocating saw as defined in any one of claims 1, 2 and 3, wherein: the hole wall relative position of through-hole has a supporting part respectively, the briquetting has a perforating hole, a U-shaped pressure spring passes the perforating hole, its both ends are located respectively on one the supporting part, the U-shaped pressure spring provides the briquetting keeps away from the elasticity of accepting the hole direction.
9. The saw blade mounting structure of the reciprocating saw as claimed in claim 1, wherein: the reciprocating rod is provided with the containing hole end, a check ring enclosed by a cylinder is embedded in the containing hole end, two ends of the check ring extend towards the interior of the containing hole end to form an extending part respectively, a crack is formed between the two extending parts, and the saw blade can enter the containing hole through the crack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910225346 CN102059397B (en) | 2009-11-16 | 2009-11-16 | Saw bit installation structure for reciprocating saw |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910225346 CN102059397B (en) | 2009-11-16 | 2009-11-16 | Saw bit installation structure for reciprocating saw |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210452708.1A Division CN102962516B (en) | 2009-11-16 | 2009-11-16 | Saw blade installing structure of reciprocating saw |
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| CN102059397A CN102059397A (en) | 2011-05-18 |
| CN102059397B true CN102059397B (en) | 2013-01-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110216329B (en) * | 2018-03-01 | 2024-07-09 | 苏州宝时得电动工具有限公司 | Saw blade clamping device and electric tool using same |
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| CN102059397A (en) | 2011-05-18 |
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Effective date of registration: 20191205 Address after: 215600 No.9, Haixin Road, Nanfeng Town, Zhangjiagang City, Suzhou City, Jiangsu Province Co-patentee after: Baoshide Electric Tools Co., Ltd., Suzhou Patentee after: Baoshide Machinery (Zhangjiagang) Co., Ltd. Address before: 215123 Jiangsu Province, Suzhou City Industrial Park East Road, No. 18 Patentee before: Baoshide Electric Tools Co., Ltd., Suzhou |
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