CN106476083B - Hand-pulling saw - Google Patents
Hand-pulling saw Download PDFInfo
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- CN106476083B CN106476083B CN201510538234.6A CN201510538234A CN106476083B CN 106476083 B CN106476083 B CN 106476083B CN 201510538234 A CN201510538234 A CN 201510538234A CN 106476083 B CN106476083 B CN 106476083B
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Abstract
The invention provides a hand-pulling saw which comprises a working table plate component and a saw blade component and is characterized in that a rotating device capable of enabling the working table plate component to rotate is arranged below the working table plate component. The rotating device is arranged between the bearing seat and the workbench plate component to realize the rotation of the workbench plate component, and the locking device and the angle positioning device realize the positioning of the workbench plate component and the automatic positioning function of a specific angle, so that the invention has outstanding substantive characteristics and remarkable progress.
Description
Technical Field
The invention relates to the technical field of wood processing, in particular to a hand-pulling saw.
Background
The existing hand-pull saw generally comprises a bearing seat, a work table plate component, a saw blade component and a machine head component, wherein the work table plate component and the saw blade component are fixedly connected with the bearing seat, and the structure is very inconvenient to use, for example, the required angle of cutting cannot be quickly and flexibly switched.
In order to solve the technical problem, a hand-operated saw for woodworker exists in the market, and the hand-operated saw comprises a working platform, a backup plate, a bedplate and a machine head unit, wherein the working platform is arranged at the top of the working machine platform; the backup plate is transversely stood in the middle of the working platform; the bedplate is arranged above the working platform in an elevated mode and is abutted against the backup plate; and the machine head unit is arranged at the rear part of the top of the working machine table, and comprises a main seat, a longitudinal rod assembled above the main seat, a worm group assembled at one side of the main seat, a machine head transversely assembled on the longitudinal rod, and a saw blade group assembled at the front end of the machine head, wherein the saw blade group can be assembled on the machine head in a front-and-back sliding manner, when the saw blade group moves along the rear end of the machine head, one saw blade of the saw blade group moves on the bedplate towards the backup plate to perform a sawing action on a workpiece, and the center of the machine head, the center front end of the bedplate and the center of the backup plate all fall on the same datum point. This hand power saw sets up rotary device in the aircraft nose below, and its structure is complicated, need drive the saw bit when the aircraft nose rotates moreover and produce very big swing angle, is unfavorable for work platform's setting.
Disclosure of Invention
The present invention overcomes at least one of the above-mentioned drawbacks of the prior art and provides a hand-held saw that can flexibly adapt to different cutting angles.
In order to solve the technical problems, the invention adopts the technical scheme that:
a hand power saw comprises a working table plate assembly and a saw blade assembly, wherein a rotating device capable of enabling the working table plate assembly to rotate is arranged below the working table plate assembly.
The hand-pull saw further comprises a bearing seat for bearing the workbench plate component, the rotating device comprises a rotating shaft which is installed on the bearing seat and can rotate, and the rotating shaft is fixedly connected with the workbench plate component.
The rotating shaft is sleeved with a positioning disk, and the positioning disk is directly or indirectly fixed on the bearing seat.
And the positioning disc is provided with a limiting device for limiting the rotation amplitude of the working platen assembly.
The limiting device is a first limiting groove and/or a second limiting groove formed in the positioning disc, and the working table plate assembly is provided with a first limiting rod assembly capable of being matched with the first limiting groove and/or a second limiting rod assembly capable of being matched with the second limiting groove.
And a locking device capable of preventing the positioning disc and the rotating shaft from moving relatively is arranged between the positioning disc and the rotating shaft.
The positioning disk middle part is equipped with the positioning disk through-hole, rotation axis upper portion is equipped with the protruding axle, the positioning disk cover is established on the protruding axle, locking device locates between positioning disk and the protruding axle, locking device includes the screw rod and locates first latch segment and second latch segment between positioning disk and the protruding axle, first latch segment and screw rod threaded connection, second latch segment and screw rod spacing connection, screw rod rotation in-process exist two kinds of operating positions at least, at first operating position, first latch segment and/or second latch segment extrusion rotation axis and positioning disk and produce the power that hinders rotation axis and positioning disk relative motion, at second operating position, first latch segment and second latch segment can't produce the power that is enough to hinder rotation axis and positioning disk relative motion.
The locking device is characterized in that the first locking block is connected with the screw rod through a first locking block hinge pin, the second locking block is connected with the screw rod through a second locking block hinge pin, the second locking block hinge pin is provided with a limiting groove or a limiting hole and is sleeved on the screw rod through the limiting groove or the limiting hole, and a first lantern ring and a second lantern ring are respectively arranged on the screw rod and on two sides of the second locking block hinge pin.
The positioning disc is provided with an angle positioning hole, and the screw rod is further provided with an angle positioning device matched with the angle positioning hole.
The angle positioning device comprises a sleeve pull rod sleeved on the screw rod, a lifting slide block is arranged at one end of the sleeve pull rod, a positioning pin matched with the angle positioning hole is embedded in the lifting slide block, and a traction device capable of driving the sleeve pull rod to horizontally move is arranged at the other end of the sleeve pull rod.
The traction device comprises a connecting rod, a wrench and a return spring, one end of the connecting rod is directly or indirectly hinged with the sleeve pull rod, the other end of the connecting rod is hinged with the wrench, the wrench is hinged with the working table plate component, and the return spring is sleeved on the sleeve pull rod and is positioned between the hinging position of the sleeve pull rod and the connecting rod and the hinging position of the wrench.
The sleeve pull rod is provided with a limit stop, and the connecting rod is hinged with the sleeve pull rod through the limit stop.
And a top pin seat is arranged above the positioning pin, and an elastic device is arranged between the top pin seat and the positioning pin.
The rotating shaft is a eccentric shaft.
And plane needle roller bearings are arranged between the eccentric shaft and the bearing seat and between the eccentric shaft and the positioning plate.
An angle graduated scale is arranged on the positioning plate.
The working table plate assembly comprises a swing angle table, a working table plate arranged above the swing angle table, a left backup plate and a right backup plate which are arranged on the swing angle table, a first limiting rod assembly is arranged on the left backup plate, a second limiting rod assembly is arranged on the right backup plate, and the linear distance between the first limiting rod assembly and the second limiting rod assembly changes when the first limiting rod assembly and the second limiting rod assembly move along the first limiting groove and the second limiting groove.
The rotating device is arranged between the bearing seat and the working platen assembly to realize the rotation of the working platen assembly, the original rotating mode of the machine head assembly is changed, the working platen assembly is rotated, the problem that the working platen assembly is driven by the rotation of the machine head assembly to generate an overlarge angle is avoided, and the working platen assembly can be more flexibly adapted to different cutting angles. In addition, the invention also realizes the functions of positioning the working table plate component and quickly positioning a specific angle through the locking device and the angle positioning device, and has outstanding substantive characteristics and remarkable progress.
Drawings
FIG. 1 is a schematic structural view of a worktop assembly and saw blade assembly of the present invention;
FIG. 2 is an exploded view of the turning gear and locking gear of the present invention;
FIG. 3 is a schematic structural view of a locking block and a locking hinge pin shaft of the present invention;
FIG. 4 is a schematic view of the locking device of the present invention in a locked state;
FIG. 5 is an enlarged view of portion I of FIG. 4;
FIG. 6 is a schematic view of the locking device of the present invention in a relaxed state;
FIG. 7 is an enlarged view of section II of FIG. 6;
FIG. 8 is a cross-sectional view of the turning gear and locking gear of the present invention;
FIG. 9 is a schematic structural view of the angular positioning apparatus of the present invention in a positioning state;
FIG. 10 is an enlarged view of section III of FIG. 9;
FIG. 11 is a schematic structural view of the angular positioning apparatus of the present invention in a released position;
FIG. 12 is an enlarged view of the portion IV of FIG. 11;
FIG. 13 is a schematic view of the construction of the lift block of the present invention;
FIG. 14 is a schematic view of the construction of the dowel and the knock pin holder of the present invention;
FIG. 15 is a schematic structural view of the inventive worktop assembly;
FIG. 16 is an enlarged view of a portion of the structure of FIG. 15;
FIG. 17 is a schematic view of the inventive worktop assembly rotated through various angles;
FIG. 18 is a schematic view of the puck of the present invention in mating relationship with the left and right back plates;
FIG. 19 is a top view of the puck of the present invention;
FIG. 20 is a graph of the functional relationship of the left and right back plates spacing.
The workbench plate assembly 100, the swing angle table 101, the workbench plate 102, the left backup plate 103, the right backup plate 104, the reinforcing rib 105, the first limit rod assembly 106, the second limit rod assembly 107, the rod body 108, the spacer 109, the bearing 110, the backup plate limit groove 111 and the backup plate spacer 112
Saw blade assembly 200, mounting plate 201, driving motor 202, saw blade 203 and guide chute 204
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent. The connection described in this patent is to be understood in the broadest sense and includes both direct and indirect connections between two components, where indirect connection is defined as the connection between two components through another component.
Example 1
As shown in fig. 1, the hand saw of the present invention includes a support base, a worktable board assembly 100 and a saw blade assembly 200 disposed on the support base, and a handpiece assembly 300, wherein the support base is mainly used for supporting the worktable board assembly 100, and therefore, the support base can be various in structure, for example, a plate-shaped base, and a bracket structure, as long as the support function is achieved. Saw bit subassembly 200 installs on aircraft nose subassembly 300, is equipped with guide rail 301 on aircraft nose subassembly 300, and saw bit subassembly 200 is including installation version 201, installs driving motor 202 and saw bit 203 on the installation version 201, and driving motor 202's pivot and saw bit 203 transmission are connected, and this transmission is connected including direct connection and indirect connection between driving motor 202 and the saw bit 203, for example, driving motor passes through gear or chain drive and drives saw bit 203 and rotate, still be equipped with on the installation version 201 and lead spout 204, thereby it can make saw bit subassembly 200 can follow guide rail 301 and remove to lead spout 204 cover and establish on guide rail 301. Other components of the blade assembly 200 and the handpiece assembly 300 are known in the art and will not be described again.
As shown in fig. 2, 15 and 16, the work table assembly 100 of the present invention includes a tilt table 101, a work table 102, and left and right back plates 103 and 104.
The swing angle platform 101 is a frame body frame structure, and is preferably made of metal materials in order to increase the bearing strength of the swing angle platform, a plurality of reinforcing ribs 105 are arranged in the frame of the swing angle platform 101, so that the strength of the swing angle platform 101 can be further increased, and the plurality of criss-cross reinforcing ribs 105 can also provide installation space for the installation of other parts.
The worktable plate 102 is installed on the swing angle table 101 and is generally fixed by screws or other means, the worktable plate 102 is used for supporting the timber to be processed, and the timber is placed on the worktable plate 102, namely, the timber can be processed by the saw blade 203.
The left backup plate 103 and the right backup plate 104 are installed on the same side of the swing angle table 101 close to the saw blade assembly 200, an operation leaning reference is provided for wood processing, the left backup plate 103 and the right backup plate 104 are arranged along one side of the swing angle table 101 and located on the same straight line, the sum of the lengths of the left backup plate 103 and the right backup plate 104 is approximately equal to the side of the swing angle table 101, the right end portion of the left backup plate 103 is adjacent to the left end portion of the right backup plate 104, and a certain gap exists between the two end portions for the saw blade 203 to pass through.
A rotating device which can enable the workbench plate assembly to rotate is arranged between the bearing seat and the workbench plate assembly 100. Specifically, as shown in fig. 2 to 8, the rotating device 400 is supported by a support base 401, and includes a rotating shaft, a positioning plate 403, a first planar needle bearing 404, and a second planar needle bearing 405.
In this embodiment, the rotating shaft is an eccentric shaft, the eccentric shaft 402 is disposed on the supporting bracket 401, the eccentric shaft 402 is a hollow shaft-like structure, the cross section of the eccentric shaft 402 is a step-shaped structure, as shown in fig. 8, a protruding shaft 406 is provided at the middle part of the eccentric shaft 402, a first supporting platform 407 is provided at the lower periphery of the protruding shaft 406, a second supporting platform 408 is provided at the outer periphery of the first supporting platform 407, the heights of the tops of the convex shaft 406, the first holding platform 407 and the second holding platform 408 are sequentially reduced to form a stepped structure, the centers of the outer ring 409 and the inner ring 410 of the protruding shaft 406 are not at the same position, and cannot be overlapped, as can be seen from the cross-sectional view thereof (fig. 8), therefore, the protruding shaft 406 is not uniform in thickness, but some parts are relatively thick and some parts are relatively thin, and the outer ring 409 and the inner ring 410 may be circular or elliptical. The pivot angle table 101 is received on the protruding shaft 406 of the eccentric shaft 402 and is fixedly connected to the protruding shaft 406, preferably by a screw connection. Rotation of the platen assembly 100 is achieved by the eccentric shaft 402.
In order to facilitate the rotation of the eccentric shaft 402, a first flat needle bearing 404 is provided below the second holding platform 408 of the eccentric shaft 402, and the first flat needle bearing 404 is received between the holding base 401 and the eccentric shaft 402, so that the eccentric shaft 402 can freely rotate on the holding base 401.
The positioning plate 403 is a substantially circular plate-shaped structure, the middle of the positioning plate 403 is a positioning plate hole 411, the positioning plate 403 is sleeved on the protruding shaft 406 of the eccentric shaft 402 through the positioning plate hole 411 and is directly or indirectly fixed on the bearing block 401, so that the positioning plate 403 is indirectly fixed with other components fixed on the bearing block 401, preferably by screws, but may also be fixed by welding or other fixing methods.
Due to the action of the eccentric shaft 402, the gap between the eccentric shaft protruding shaft 406 and the positioning plate 403 is not a constant value, but is somewhat larger and somewhat smaller. A second flat needle bearing 405 is disposed between the positioning disc 403 and the eccentric shaft 402, and specifically, the second flat needle bearing 405 is disposed above the eccentric shaft second supporting platform 408 for supporting the positioning disc 403, and the eccentric shaft 402 can freely rotate by the cooperation of the first flat needle bearing 404 and the second flat needle bearing 405.
The positioning disc 403 is provided with a limiting device for limiting the rotation amplitude of the working table board assembly 100, the limiting device is a first limiting groove 412 and a second limiting groove 413 which are arranged on the positioning disc 403, and correspondingly, the working table board assembly 100 is provided with a first limiting rod assembly 106 and a second limiting rod assembly 107 which can be respectively matched with the first limiting groove 412 and the second limiting groove 413.
Specifically, the first limiting groove 412 is disposed at an outer edge of one side of the positioning plate 403, a first stop surface 414 and a second stop surface 415 are respectively disposed at two ends of the first limiting groove 412, and the first limiting rod assembly 106 is clamped into the first limiting groove 412 and can reciprocate between the first stop surface 414 and the second stop surface 415 along a track of the first limiting groove 412, as shown in fig. 18.
The second limiting groove 413 is disposed on the other side of the positioning disc 403, opposite to the first limiting groove 412, and is of an annular groove structure, and the second limiting rod assembly 107 is embedded in the second limiting groove 413 and can slide in the second limiting groove 413, as shown in fig. 18.
As shown in fig. 15, 16 and 18, the first limit rod assembly 106 is fixedly mounted on the left back plate 103, the second limit rod assembly 107 is fixedly mounted on the right back plate 104, the first limit rod assembly 106 includes a rod 108 fixedly connected to the left back plate 103, and the rod 108 is preferably a bolt or a screw for convenience of installation. The rod 108 is sleeved with a spacer 109 and a bearing 110, the spacer 109 is used for positioning the bearing 110 to prevent the bearing 110 from moving up and down on the rod 108, and when the first limit rod assembly 106 is matched with the first limit groove 412, the bearing 110 is contacted with the edge of the first limit groove 412, so that the friction between the first limit rod assembly 106 and the first limit groove 412 can be reduced. The second stop rod assembly 107 is identical in structure to the first stop rod assembly 106 and will not be discussed again.
As shown in fig. 2 to 8, a locking device capable of preventing the positioning plate 403 and the protruding shaft 406 from moving relatively is disposed between the positioning plate 403 and the protruding shaft 406. The locking means includes a threaded rod 416, first 417 and second 418 locking blocks, a first 419 locking block hinge pin, a second 420 locking block hinge pin, a first 421 and second 422 collar.
One end of the screw 416 is provided with a thread, which divides the screw 416 into two parts, namely a threaded section and a smooth section. The swing angle table 101 is provided with a through hole for the screw 416 to pass through, so that the screw 416 can extend out from the position of the protruding shaft 406.
The first 417 and second 418 locking blocks are preferably half-moon shaped and are supported on the eccentric shaft first support platform 407 and are located in the puck hole between the protruding shaft 406 and the puck 403 as shown in figure 8. Of course, the first and second locking blocks 417, 418 may be other shapes that can cooperate with the protruding shaft 406 and the positioning plate 403. The first locking block 417 is directly screwed with the screw rod 416, or is screwed with the screw rod 416 through a first locking block hinge pin 419, the first locking block hinge pin 419 comprises a threaded hole 423 capable of being engaged with the screw rod 416 and a first hinge shaft 424 arranged below the threaded hole 423, a first through hole 425 is formed in the first locking block 417, and the first hinge shaft 424 is inserted into the first through hole 425 and movably connected with the first through hole 425.
The second locking block 418 is in axial limit connection with the screw 416, where the limit connection means that the second locking block 418 and the screw 416 are in a limit fit relationship, that is, the connection relationship between the screw 416 and the second locking block 418 is mainly embodied in the limit of the screw 416 to the second locking block 418, that is, the displacement or movement of the second locking block 418 cannot be released from the constraint of the screw 416. In order to realize the limit connection, a limit groove or a limit hole capable of being matched with the screw 416 can be directly or indirectly arranged on the second locking block 418, namely, the limit groove or the limit hole is arranged on a part directly or indirectly connected with the second locking block 418, in terms of the embodiment, the second locking block 418 and the screw 416 are connected together through the second locking block hinge pin 420, firstly, a second locking block hinge pin 420 is provided, the second locking block hinge pin 420 comprises a groove 427, a second hinge shaft 428 is arranged below the groove 427, a second through hole 429 is arranged on the second locking block 418, and the second hinge shaft 428 is inserted into the second through hole 429 and movably connected with the second through hole 429.
The first collar has the function of limiting the screw rod from being separated from the first locking block, but mainly has the function of supporting the hinge pin of the second locking block to generate tension when in tension. When the locking device is loosened, pulling force is generated on the second locking block, so that the second locking block moves towards the second sleeve ring.
In order to support the extrusion force generated by the second locking block hinge pin 420 when the first locking block 417 and the second locking block 418 move relatively, the first collar 421 and the second collar 422 are respectively disposed on the screw and the second locking block hinge pin in this embodiment, the first collar 421 and the second collar 422 are fixedly connected to the screw 416, specifically, the first collar 421 is sleeved on the left end of the second locking block 418 and the end of the thread section, and the second collar 422 is sleeved on the right end of the second locking block 418.
When the locking device is used, the locking device has two states, namely a release state and a locking state, and in the release state, as shown in fig. 6 and 7, the first locking block 417 and the second locking block 418 are in a free contact state with the convex shaft 406 and the positioning disc 403, namely, no force for preventing the relative movement of the convex shaft 406 and the positioning disc 403 is generated between the first locking block 417 and the second locking block 418 and between the convex shaft 406 and the positioning disc 403, and the eccentric shaft 402, the first locking block 417 and the second locking block 418 can be driven to rotate by stirring the worktable assembly 100 through the swing table 101, so that the change of the angle of the worktable assembly is realized.
During the locking action, as shown in fig. 4 and 5, the first locking block 417 is moved along the screw 416 away from the second locking block 418 by rotating the screw 416, so that the first locking block 417 and/or the second locking block 418 generate a pressing force on the protruding shaft 406 and the positioning plate 403, and the pressing force generates a sufficient friction force when the first locking block 417 and/or the second locking block 418 are displaced relative to the protruding shaft 406 and the positioning plate 403, so as to block the protruding shaft 406 and the positioning plate 403 from moving relatively, and finally, a locking state is achieved, so that a positioning effect is generated. When the locking state needs to be released, the screw 416 is rotated in the opposite direction, so that the first locking block 417 moves along the screw 416 towards the second locking block 418, and the pressing force of the first locking block 417 and/or the second locking block 418 on the convex shaft 406 and the positioning disk 403 is gradually reduced until the first locking block 417 and the second locking block 418 can freely slide relative to the convex shaft 406 and the positioning disk 403, as shown in fig. 6 and 7.
In order to realize automatic positioning of the angle of the workbench assembly, the positioning plate 403 is provided with a plurality of angle positioning holes, and the screw 416 is further provided with an angle positioning device matched with the angle positioning holes. The angle positioning device comprises a sleeve pull rod 433 sleeved on the screw 416, a lifting slider 434 is arranged at one end of the sleeve pull rod 433, a positioning pin 435 matched with the angle positioning hole is embedded in the lifting slider 434, and a traction device capable of driving the sleeve pull rod to horizontally move is arranged at the other end of the sleeve pull rod 433.
The angle positioning holes can be set as required, for example, the positioning plate of this embodiment is provided with 0 degree positioning hole 426 and 45 degree positioning hole 436, meanwhile, in order to determine the rotation angle of the workbench plate assembly, an angle scale 437 is further provided on the positioning plate, and in order to read the size of the angle scale value, a magnifying lens seat 438 and a magnifying lens 439 fixed on the magnifying lens seat 438 are further provided on the tilt table.
As shown in fig. 9 to 13, the lifting slider 434 is composed of a first sidewall 440, a second sidewall 441 and a connecting plate 442, the first sidewall 440 and the second sidewall 441 each include a low supporting surface 443 and a high supporting surface 444, the low supporting surface 443 and the high supporting surface 444 are connected by a slope 445, the first sidewall 440 and the second sidewall 441 are symmetrically installed at both sides of the connecting plate 442 to form a slide rail, specifically, the connecting plate 442 is connected to the ends of the low supporting surface 443 of the first sidewall 440 and the second sidewall 441, the connecting plate 442 is connected to a tension rod 433, and the first sidewall 440, the second sidewall 441 and the connecting plate 442 may be integrally formed.
The positioning pin 435 includes a joint portion 446 and a pin shaft 447, and the pin shaft 447 is disposed below the joint portion 446, and the positioning pin 435 is embedded on the lifting slider 434, specifically, the joint portion 446 of the positioning pin is mounted on the first side wall 440 and the second side wall 441, and can slide along the first side wall 440 and the second side wall 441 under traction force. Still fixed top pin seat 448 that is equipped with above joint portion 446, locating pin 435 joint is in top pin seat 448 to can be along vertical direction displacement from top to bottom in top pin seat 448, but unable lateral displacement, be equipped with powerful spring 449 between joint portion 446 and the top pin seat 448, locating pin 435 sets up to make it move along with screw 416 on the positioning disk, the angle locating hole can fall on the motion trail of locating pin 435 just.
The traction device comprises a connecting rod 450, a wrench 451 and a return spring 452, wherein the connecting rod 450 is boat-shaped, one end of the connecting rod is hinged with the sleeve pull rod 433, and the hinging comprises direct hinging between the two parts and indirect hinging between the two parts through a third part. In this embodiment, a limit stop 453 is disposed on the sleeve pull rod 433, and the connecting rod 450 is hinged to the sleeve pull rod 433 through the limit stop 453. The other end of the connecting rod 450 is hinged to the wrench 451, a rectangular connecting piece 454 is arranged at the end of the wrench 451, two ends of the connecting piece 454 are respectively provided with a through hole, one of the through holes is hinged to the connecting rod 450, the other through hole is hinged to the swing angle table 101, a through hole for the screw 416 to pass through is arranged on the swing angle table 101, the return spring 452 is sleeved on the sleeve pull rod 433 and is positioned between the hinged position of the sleeve pull rod 433 and the connecting rod 450 and the hinged position of the wrench 451 and the swing angle table 101, namely the return spring 452 is positioned between the limit stop 453 and the swing angle table 101.
When the work table assembly 100 is pulled, the screw 416 and the positioning pin 435 connected to the screw rotate together with the work table assembly 100, when the positioning pin 435 moves above the angular positioning hole, the positioning pin 435 is inserted into the angular positioning hole under the action of the spring 449, so that the angular rapid positioning of the work table assembly 100 is achieved, and then the work table assembly 100 is fixed by screwing the screw 416, at this time, the traction device is in an initial state, in which the return spring 452 of the traction device is in a natural extension state, and does not generate an elastic force or an elastic force sufficient to cause a characteristic effect, and the positioning pin 435 is located on the low supporting surface 443 of the lifting slider 434, as shown in fig. 9 and 10. When the angular positioning needs to be released, the wrench 451 is only needed to be pulled, the sleeve pull rod 433 is driven by the connecting rod 450 to move rightwards, as shown in fig. 11, the return spring 452 is simultaneously compressed, the lifting device 434 is driven by the sleeve pull rod 433 to synchronously move rightwards, the positioning pin 435 is gradually transited from the low supporting surface 443 to the high supporting surface 444 through the inclined surface 445, and meanwhile, the positioning pin 435 gradually leaves the angular positioning hole, so that the angular positioning is released. When the wrench 451 is pulled again to return to the initial state, the sleeve rod 433 returns to the initial state by the return spring 452, and drives the lifting slider 434 and the positioning pin 435 to return to the initial state.
Example 2
This embodiment is an improvement on the partial structure based on embodiment 1, or proposes an alternative to the partial structure, and the rest of the features are the same as those of embodiment 1.
This embodiment provides an alternative solution to the eccentric shaft, and this embodiment adopts a conventional shaft structure, which is the same as the eccentric shaft described in embodiment 1, namely, the protruding shaft 406, the first supporting platform 407, and the second supporting platform 408, but the centers of the circles of the outer circular ring 409 and the inner circular ring 410 of the conventional shaft used in this embodiment are overlapped, that is, the thickness of the protruding shaft 406 is uniform. In this embodiment, the axis of the conventional shaft is offset from the axis of the puck hole 411 of the puck only when the shaft is mounted, that is, the gap between the protruding shaft and the puck is larger in some portions and smaller in other portions.
Example 3
This embodiment is an improvement on the partial structure based on embodiment 1, or proposes an alternative to the partial structure, and the rest of the features are the same as those of embodiment 1.
As shown in fig. 18 to 20, in this embodiment, a connection manner of the left backup plate 103 and the right backup plate 104 in embodiment 1 is improved, in this embodiment, two backup plate limiting grooves 111 are respectively provided on the left backup plate 103 and the right backup plate 104, and the left backup plate and the right backup plate are disposed on the tilt angle table 101 by passing screws through the backup plate limiting grooves 111, so that the two backup plates can slide in a range defined by the backup plate limiting grooves 111, and the distance between the two backup plates can be conveniently adjusted. In order to further facilitate the sliding of the backup plate, a backup plate spacer 112 can be sleeved on the screw.
The embodiment further improves the first and second limiting grooves 412 and 413 on the positioning plate, so that when the first and second limiting rod assemblies 106 and 107 move along the first and second limiting grooves 412 and 413, the linear distance S1 between the first and second limiting rod assemblies 106 and 107 changes according to the rotation angle of the work table assembly 100, and the change relationship is preferably a linear function relationship, i.e. as the rotation angle increases, S1 also becomes larger, so that the distance between the left and right back plates is enlarged, and sufficient space is provided for the operation of the saw blade 203, at this time, the 0-degree position of the work table assembly 100 will be defined, and when the left and right back plates are perpendicular to the axis of the saw blade assembly 200, the 0-degree position of the work table assembly 100, i.e. the position shown in fig. 1, will be defined.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A hand-pulling saw comprises a working table plate component and a saw blade component and is characterized in that a rotating device capable of enabling the working table plate component to rotate is arranged below the working table plate component, the working table plate component comprises a swing angle table, the hand-pulling saw further comprises a bearing seat used for bearing the working table plate component, the rotating device comprises a rotating shaft which is installed on the bearing seat and can rotate, the rotating shaft is fixedly connected with the working table plate component, a positioning disc is sleeved on the rotating shaft, the positioning disc is directly or indirectly fixed on the bearing seat, a limiting device used for limiting the rotation amplitude of the working table plate component is arranged on the positioning disc, the limiting device is a first limiting groove and/or a second limiting groove which are arranged on the positioning disc, the working table plate component is provided with a first limiting rod component capable of being matched with the first limiting groove and/or a second limiting rod component capable of being matched with the second limiting groove, a locking device which can prevent the relative movement of the positioning disc and the rotating shaft is arranged between the positioning disc and the rotating shaft, the middle part of the positioning disc is provided with a positioning disc through hole, the upper part of the rotating shaft is provided with a convex shaft, the positioning disc is sleeved on the convex shaft, the locking device is arranged between the positioning disc and the convex shaft and comprises a screw rod, a first locking block and a second locking block which are arranged between the positioning disc and the convex shaft, the first locking block is in threaded connection with the screw, the second locking block is in limit connection with the screw, at least two working positions exist in the rotation process of the screw, in the first working position, the first locking block and/or the second locking block press the rotating shaft and the positioning disc and generate force for resisting the relative movement of the rotating shaft and the positioning disc, in the second working position, the first locking block and the second locking block cannot generate enough force to block the relative movement of the rotating shaft and the positioning disc.
2. The hand saw of claim 1, wherein the first locking block is connected to the screw via a first locking block hinge pin, the second locking block is connected to the screw via a second locking block hinge pin, the second locking block hinge pin is provided with a limiting groove or a limiting hole and is sleeved on the screw via the limiting groove or the limiting hole, and the screw and two sides of the second locking block hinge pin are respectively provided with a first sleeve ring and a second sleeve ring.
3. The hand saw as claimed in claim 2, wherein the positioning plate is provided with an angular positioning hole, and the threaded rod is further provided with an angular positioning device engaged with the angular positioning hole.
4. The hand saw of claim 3, wherein the angle positioning device comprises a sleeve pull rod sleeved on the screw rod, one end of the sleeve pull rod is connected with a lifting slide block, a positioning pin matched with the angle positioning hole is embedded in the lifting slide block, and the other end of the sleeve pull rod is provided with a traction device capable of driving the sleeve pull rod to move horizontally.
5. The hand saw of claim 4, wherein the traction device comprises a connecting rod, a wrench and a return spring, one end of the connecting rod is directly or indirectly hinged to the sleeve pull rod, the other end of the connecting rod is hinged to the wrench, the wrench is hinged to the worktable plate assembly, and the return spring is sleeved on the sleeve pull rod and located between a hinge position of the sleeve pull rod and the connecting rod and a hinge position of the wrench and the swing angle table.
6. The hand saw of claim 5, wherein the pull rod sleeve is provided with a limit stop, and the connecting rod is hinged with the pull rod sleeve through the limit stop.
7. The hand saw of claim 4, wherein the locating pin is provided with a pin ejecting seat above, and an elastic device is arranged between the pin ejecting seat and the locating pin.
8. A hand saw according to any of claims 2 to 7 wherein the rotation shaft is an eccentric shaft.
9. The hand saw of claim 8 wherein planar needle bearings are provided between the eccentric shaft and the shoe and between the eccentric shaft and the puck.
10. The hand power saw of any one of claims 2 to 7, wherein the work table assembly further comprises a work table plate disposed above the swing angle table, and a left backup plate and a right backup plate disposed on the swing angle table, the first limit rod assembly is disposed on the left backup plate, the second limit rod assembly is disposed on the right backup plate, and the first limit groove and the second limit groove are configured such that when the first limit rod assembly and the second limit rod assembly move along the first limit groove and the second limit groove, the linear distance between the first limit rod assembly and the second limit rod assembly changes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510538234.6A CN106476083B (en) | 2015-08-28 | 2015-08-28 | Hand-pulling saw |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510538234.6A CN106476083B (en) | 2015-08-28 | 2015-08-28 | Hand-pulling saw |
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| CN106476083A CN106476083A (en) | 2017-03-08 |
| CN106476083B true CN106476083B (en) | 2020-02-07 |
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| CN106476083A (en) | 2017-03-08 |
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