CN115283749A

CN115283749A - Table saw

Info

Publication number: CN115283749A
Application number: CN202111625924.7A
Authority: CN
Inventors: 徐飞好; 胡万里; 刘云斌
Original assignee: Zhengyang Technology Co ltd
Current assignee: Zhengyang Technology Co ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-11-04
Anticipated expiration: 2041-12-29
Also published as: CN115283749B

Abstract

The invention discloses a table saw which comprises an electric circular saw main body, a rack, an automatic height adjusting system and an automatic gear shifting system, wherein the automatic height adjusting system comprises a protective cover and a height adjusting assembly, the electric circular saw main body is fixed on the height adjusting assembly through a limiting piece, the height of the electric circular saw main body is controlled by the protective cover, the automatic gear shifting system comprises a pneumatic push rod mechanism, an inflating mechanism, a starting switch and a reset switch, the pneumatic push rod mechanism is inflated through the inflating mechanism, and a push rod of the pneumatic push rod mechanism is pushed to reach the maximum stroke to trigger a tail end gear shifting switch so as to realize the switching from a low rotating speed gear to a high rotating speed gear. An automatic height adjusting system is arranged to automatically adjust the height of the saw blade along with the height of an object, so that part of working procedures are reduced, and the working efficiency is improved; the automatic gear shifting system is arranged, so that automatic gear shifting along with the load is realized, partial processes are reduced, and the working efficiency is improved.

Description

Table saw

Technical Field

The invention designs a table saw, in particular to a table saw, the height of a saw blade of which can be automatically adjusted along with the height of a workpiece and can automatically switch gears along with the load.

Background

When an operator uses the table saw, the operator is not easy to perceive the fact that a workpiece with the thickness possibly exceeding the cutting range of the circular saw blade is taken, the cutting range of the circular saw blade is the distance between the top edge of the circular saw blade and the working table surface, generally, the workpiece is pushed backwards by a certain distance, after the workpiece is cut by a certain length, the operator can find that the workpiece exceeds the cutting range of the circular saw blade and cannot be completely cut, the machine has to be stopped firstly, then the workpiece is withdrawn from the circular saw blade, the height of the circular saw blade extending out of the working table is readjusted until the workpiece can be completely cut, the operation is very inconvenient, and the workpiece is withdrawn under the condition that the workpiece is partially cut, the safety is low for the operator, in addition, due to the increase of working procedures, the operator takes more time, and the working efficiency is greatly reduced.

On the other hand, the table saw on the market often needs to switch high and low gears manually, and when an operator finds that the workpiece is not switched at the low gear, the operator has to stop the machine firstly, then quit the workpiece from the circular saw blade, and switch gears to cut again, so that the work efficiency is also reduced.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the table saw, and the height of the saw blade can be automatically adjusted along with the height of a workpiece, and the gear can be automatically switched along with the load.

The technical scheme adopted by the invention for solving the technical problem is as follows: the utility model provides a bench saw, includes electric circular saw main part, frame, high automatic regulating system and gear automatic transformation system, high automatic regulating system includes guard shield and high adjusting part, the electric circular saw main part passes through the locating part to be fixed high adjusting part is last by guard shield control electric circular saw main part height, gear automatic transformation system includes pneumatic push rod mechanism, aerifys mechanism, starting switch and reset switch, through aerify the mechanism and give pneumatic push rod mechanism aerifys, pneumatic push rod mechanism's push rod pushes away to reaching the biggest stroke and triggers terminal gearshift and realize the switching of low rotational speed shelves to high rotational speed shelves.

Among the above-mentioned technical scheme, furtherly, high automatic regulating system still includes the dead lever, dead lever one end with the guard shield rotates to be connected, the other end with the mesa fixed connection of frame, high regulating assembly includes head rod, second connecting rod, third connecting rod, slip rack, slip fixing base and gear composition, head rod one end with the articulated other end of guard shield with the second connecting rod is articulated, the second connecting rod is in longitudinal movement in the guide way on the mesa, the second connecting rod with the third connecting rod is articulated, the third connecting rod with the slip rack is articulated, the slip rack is in slip fixing base lateral sliding and with gear engagement transmission, the gear with electric circular saw main part tooth portion meshes, realizes the longitudinal movement of electric circular saw main part.

Among the above-mentioned technical scheme, furtherly, electric circular saw main part still includes a plurality of sliders and a plurality of guide rail, electric circular saw main part passes through the locating part to be fixed on the slider, the guide rail passes through the fixed block to be fixed in the frame, the slider with guide rail sliding connection reduces through setting up guide rail slider electric circular saw main part longitudinal movement's resistance, the guard shield head sets up for the oblique angle, makes things convenient for the work piece to push will the guard shield jack-up.

Among the above-mentioned technical scheme, furtherly, aerify the mechanism and include driven gear, fourth connecting rod, tuber pipe and slider, driven gear with the driving gear meshing transmission of electric circular saw main part, fourth connecting rod one end with driven gear is articulated, the other end with the slider is articulated, the slider is in slide in the tuber pipe, the built-in cavity of slider, set up end cap and elastomeric element in the cavity, when the ejector pad is back-drawn, the inside negative pressure that produces of tuber pipe, the end cap will elastomeric element pushes down, the air admission tuber pipe, the slider normal motion, the tuber pipe is the setting of T type, set up the partition panel in the tuber pipe, the partition panel pass through elastomeric element with tuber pipe elastic connection, the tuber pipe divide into the movable part of inlet portion, first air-out portion, second air-out portion and partition panel activity that the slider removed, first air-out portion sets up first air outlet and first check valve, second air-out portion sets up second air outlet and second check valve, air-in the inlet portion with set up the third check valve between the movable part, first air-out portion top sets up, electromagnetic switch and reset control are opened to the iron.

In the above technical scheme, further, the pneumatic push rod mechanism includes an outer cylinder body, an inner cylinder body and a push rod, the inner cylinder body is arranged in the outer cylinder body and is in sliding connection, the push rod is arranged in the inner cylinder body and is in sliding connection, the bottom of the inner cylinder body is provided with a first step and a second step, the diameter of the second step is slightly smaller than that of the first step, the bottom of the push rod is provided with a third step and a fourth step, the outer cylinder body is provided with a first air inlet communicated with the inside of the cylinder through a second air inlet, the inner cylinder body is provided with a first ventilation channel, one end of the inner cylinder body is arranged on the second step, the other end of the inner cylinder body is arranged on the top of the inner cavity, a second ventilation channel is arranged inside the push rod, one end of the inner cylinder body is arranged on the fourth step, the other end of the inner cylinder body is communicated with the second air inlet, and the tail of the second ventilation channel is provided with a one-way valve.

The working process of the invention is as follows: an operator starts the electric circular saw, a driving gear on an electric circular saw main body rotates to drive a driven gear, the sliding block reciprocates in the air duct under the action of the driven gear of the electric circular saw main body, air is pushed into a movable part when the push block moves forward, a third one-way valve is arranged between the movable part and the air inlet part, and when the push block moves backward, negative pressure in the cavity sucks down a plug, air enters the plug, the plug rebounds, and the plug reciprocates to realize an inflation function; an operator pushes a workpiece into a working area, the workpiece jacks up the protective cover, and the protective cover drives the height adjusting assembly to lift the electric circular saw main body to complete automatic adjustment of the height of the saw blade; meanwhile, the starting switch is triggered in the process of pushing the workpiece, the electromagnet is electrified, the partition plate is sucked above the movable area, the gas enters the second air inlet through the second air outlet, the second air inlet starts to admit air, the inner cylinder body is taken out when the push rod is ejected to the limit position, redundant gas is discharged from the first air inlet and enters the first air outlet part through the first air outlet, when the internal pressure of the first air outlet part is overlarge, the first one-way valve is opened and is discharged to the outside, if the reset switch is not triggered when the pneumatic push rod mechanism reaches the limit position, the push rod triggers the gear shifting switch, and the electric circular saw is switched to a high gear; if trigger reset switch in advance, then the solenoid valve loses the electricity, and the partition panel resets under the extension spring effect, gaseous through first gas outlet entering first air inlet, first air inlet begins the air admission, and gaseous cavity between entering third step and the fourth step through first ventiduct pushes back the push rod, and the inner cylinder body resets after the push rod resets, and pneumatic push rod subassembly resets and accomplishes the back, and unnecessary gas is discharged from the second air inlet through the check valve of second ventiduct and is got into second air-out portion through the second gas outlet, and when second air-out portion internal pressure was too big, the second check valve opened, the outside of discharging.

When the push block moves forwards, air is pushed into a first air inlet of the pneumatic push rod mechanism, when the push block moves backwards, negative pressure in the cavity sucks down the plug, air enters the plug, the plug rebounds, the plug reciprocates to realize an inflation function, and the push rod is pushed out under the action of air pressure; impel the work piece and trigger reset switch, the electro-magnet outage, the partition panel resets to the active area below under the elastomeric element effect, and the air impels the second air inlet, the push rod is withdrawed, and if the work piece is harder, cutting speed is slower, and the work piece does not trigger reset switch, and the push rod pushes away to shift switch, converts to high rotational speed gear.

The invention has the beneficial effects that: 1. the automatic height adjusting system is arranged, so that the height of the saw blade is automatically adjusted along with the height of an object, partial working procedures are reduced, and the working efficiency is improved.

2. The automatic gear shifting system is arranged, so that automatic gear shifting along with the load is realized, partial processes are reduced, and the working efficiency is improved.

Drawings

The invention is further illustrated by the following examples in conjunction with the drawings.

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a schematic view of the structure of the shaft side of the present invention.

Fig. 3 is a schematic structural view of the electric circular saw body of the present invention.

Fig. 4 is a schematic view of the automatic height adjusting system of the present invention.

Fig. 5 is a schematic view of the structure of the inflation mechanism of the present invention.

Fig. 6 is a schematic view of the internal structure of fig. 5 of the present invention.

Fig. 7 is an internal structural view of the reset state of the pneumatic push rod mechanism of the invention.

Fig. 8 is a schematic view showing the internal structure of the extended state of the pneumatic pusher mechanism of the present invention.

In the drawings, 1. An electric circular saw body, 11. A toothed portion, 12. A slider, 13. A guide rail, 14. A pinion gear, 2. A frame, 21. A table, 3. An automatic height adjustment system, 31. A guard, 32. A height adjustment assembly, 321. A first connecting rod, 322. A second connecting rod, 323. A third connecting rod, 324. A sliding rack, 325. A sliding holder, 326. A gear, 33. A fixing rod, 4. An automatic gear shift system, 41. A pneumatic push rod mechanism, 411. An outer cylinder, 412. An inner cylinder, 4121. A first step, 4122. A second step, 4123. A first ventilation duct, 413. A push rod, 4131. A third step, 4132. A fourth step, 4133, a second air passage, 414, a first air inlet, 415, a second air inlet, 416, a check valve, 42, an air charging mechanism, 421, a driven gear, 422, a fourth connecting rod, 423, an air duct, 4231, an air inlet portion, 4232, a first air outlet portion, 4233, a second air outlet portion, 4234, a movable portion, 4235, an electromagnet, 4236, a third check valve, 424, a slider, 4241, a plug, 4242, an elastic member, 425, a partition plate, 426, a first check valve, 427, a second check valve, 428, a first air outlet, 429, a second air outlet, 43, an activation switch, 44, a reset switch, 45, and a shift switch.

Detailed Description

Referring to fig. 1 to 5, a table saw includes an electric circular saw body 1, a frame 2, an automatic height adjusting system 3, and an automatic gear shifting system 4.

In order to enable the saw blade height to be automatically adjusted along with the workpiece height, an automatic height adjusting system 3 is provided, the automatic height adjusting system 3 includes a protective cover 31 and a height adjusting assembly 32, the electric circular saw body 1 is fixed on the height adjusting assembly 32 through a limiting member, the protective cover 31 controls the height of the electric circular saw body 1, the automatic height adjusting system 3 further includes a fixing rod 33, one end of the fixing rod 33 is rotatably connected with the protective cover 31, and the other end of the fixing rod is fixedly connected with the table-board 21 of the machine frame 2, the height adjusting assembly 32 includes a first connecting rod 321, a second connecting rod 322, a third connecting rod 323, a sliding rack 324, a sliding fixing seat 325 and a gear 326, one end of the first connecting rod 321 is hinged with the protective cover 31 and the other end of the first connecting rod 322 is hinged with the second connecting rod 322, the second connecting rod 322 is longitudinally movable in a guide groove of the table-board 21, the second connecting rod 322 is hinged with the third connecting rod 323, the third connecting rod 323 is hinged with the sliding rack 324, the sliding rack 324 is hinged with the sliding rack 325 transversely slides and is meshed with the gear 326, and the gear is meshed with the electric circular saw body 1, so as to realize the longitudinal movement of the electric circular saw body 1.

In order to reduce the resistance of the longitudinal movement of the electric circular saw, the electric circular saw main body 1 further comprises a plurality of sliders 12 and a plurality of guide rails 13, the electric circular saw main body 1 is fixed on the sliders 12 through a limiting part, the guide rails 13 are fixed on the rack through fixing blocks, and the sliders 12 are connected with the guide rails 13 in a sliding manner.

In order to enable the table saw to automatically switch gears along with the load, the load is judged by the interval time triggered by the starting switch 43 and the reset switch 44, the longer the interval time is, the more difficult the workpiece is to be processed, the longer the extending distance of the push rod 413 is, the more the push rod 413 extends to the limit position to trigger the gear shifting switch 45, if the interval time is shorter, the more easy the workpiece is to be processed, the shorter the extending distance of the push rod triggers the reset switch 44, and the push rod 413 is reset to the initial position; the air charging mechanism 42 comprises a driven gear 421, a fourth connecting rod 422, an air pipe 423 and a sliding block 424, the driven gear 421 is in meshing transmission with a driving gear 14 of the electric circular saw main body 1, one end of the fourth connecting rod 422 is hinged to the driven gear 421, the other end of the fourth connecting rod 422 is hinged to the sliding block 424, the sliding block 424 slides in the air pipe 423, a cavity is arranged in the sliding block 424, a plug 4241 and an elastic component 4242 are arranged in the cavity, when the push block 424 is pulled back, negative pressure is generated inside the air pipe 423, the plug 4241 presses down the elastic component 4242, air enters the air pipe 423, the sliding block 424 normally moves, the air pipe 423 is arranged in a T shape, a partition plate 425 is arranged in the air pipe 423, the air pipe partition plate 425 is elastically connected with the air pipe 423 through a tension spring, the air pipe 423 is divided into an air inlet portion 4231 for moving the sliding block 424, a first air outlet portion 4232, a second air outlet portion 4233 and a movable portion 4234 for moving the partition plate, the first air outlet portion 4232 is provided with a first air outlet 428 and a first check valve 426, the second air outlet portion 4233 is provided with a second air outlet 429 and a second check valve 427, the first air outlet 428 is connected with the first air inlet 414 through a plastic hollow tube, the second air outlet 429 is connected with the second air inlet 415 through a plastic hollow tube, the top of the first air outlet portion 4232 is provided with an electromagnet 4235, the on-off state of the electromagnet 4235 is controlled by the start switch 43 and the reset switch 44, as shown in fig. 7, the pneumatic push rod mechanism 41 comprises an outer cylinder body 411, an inner cylinder body 412 and a push rod 413, the inner cylinder body 412 is arranged in the outer cylinder body 411 in a sliding connection, the push rod 413 is arranged in the inner cylinder body 412 in a sliding connection, the bottom of the inner cylinder body 412 is provided with a first step 4121 and a second step 4122, the diameter of the second step 4122 is slightly smaller than that of the first step 4121, the bottom of the push rod 413 is provided with a third step 4131 and a fourth step 4132, the outer cylinder 411 is provided with a first air inlet 414 communicated with the inside of the cylinder through a second air inlet 415, the inner cylinder 412 is provided with a first air channel 4123, one end of the first air channel 4123 is arranged at the second step 4122, the other end of the first air channel 4123 is arranged at the top of the inner cavity, the push rod 413 is internally provided with a second air channel 4133, one end of the second air channel 4132 is arranged at the fourth step 4132, the other end of the second air channel 4133 is communicated with the second air inlet 415, the tail of the second air channel 4133 is provided with a check valve 416, as shown in fig. 8, the push rod 413 extends to the limit position, one end of the first air channel 4123 is the same as the first air inlet 414, and the other end of the first air channel 4123 is communicated with the cavity formed by the third step 4131 and the fourth step 4132.

In order to facilitate pushing the workpiece into the protective cover 31, the head of the protective cover 31 is arranged at an oblique angle.

According to the design, the workpiece is pushed into or leaves the protective cover 31, and the protective cover 31 is lifted so as to drive the height adjusting assembly 32 to move to lift the electric circular saw body 1; similarly, the workpiece is pushed into the working area, the distance of pushing the push rod out in unit time is the same through the interval time of two switches on the trigger path, and if the reset switch is not triggered in set time, the push rod is pushed to the limit position to finish gear shifting.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and simple modifications, equivalent changes and modifications may be made without departing from the technical scope of the present invention.

Claims

1. The utility model provides a bench saw, includes electric circular saw main part, frame, high automatic regulating system and gear automatic transformation system, its characterized in that: high automatic regulating system includes guard shield and altitude mixture control subassembly, the electric circular saw main part is fixed through the locating part height adjustment subassembly go up by guard shield control electric circular saw main part height, gear automatic transformation system includes pneumatic push rod mechanism, aerifys mechanism, starting switch and reset switch, through aerify the mechanism and give pneumatic push rod mechanism aerifys, pneumatic push rod mechanism's push rod pushes away to reaching the biggest stroke and triggers the switching that terminal gearshift realized low rotational speed shelves to high rotational speed shelves.

2. The table saw of claim 1, wherein the automatic height adjustment system further comprises a fixing rod, one end of the fixing rod is rotatably connected to the guard, and the other end of the fixing rod is fixedly connected to the table top of the machine frame, the height adjustment assembly comprises a first connecting rod, a second connecting rod, a third connecting rod, a sliding rack, a sliding fixing seat and a gear, one end of the first connecting rod is hinged to the guard, the other end of the first connecting rod is hinged to the second connecting rod, the second connecting rod longitudinally moves in the guide groove of the table top, the second connecting rod is hinged to the third connecting rod, the third connecting rod is hinged to the sliding rack, the sliding rack transversely slides in the sliding fixing seat and is in meshing transmission with the gear, and the gear is in meshing engagement with the teeth of the electric circular saw body, so as to achieve the longitudinal movement of the electric circular saw body.

3. The table saw of claim 1, wherein the electric circular saw main body further comprises a plurality of sliders and a plurality of guide rails, the electric circular saw main body is fixed on the sliders through limiting members, the guide rails are fixed on the frame through fixing blocks, the sliders are slidably connected with the guide rails, and resistance to longitudinal movement of the electric circular saw main body is reduced by the guide rails.

4. The table saw of claim 1, wherein the inflating mechanism comprises a driven gear, a fourth connecting rod, an air duct and a slider, the driven gear is engaged with and driven by a driving gear of the electric circular saw body, one end of the fourth connecting rod is hinged to the driven gear, the other end of the fourth connecting rod is hinged to the slider, the slider slides in the air duct, a cavity is arranged in the slider, a plug and an elastic component are arranged in the cavity, when the push block is pulled back, negative pressure is generated in the air duct, the plug presses down the elastic component, air enters the air duct, and the slider moves normally.

5. The table saw of claim 4, wherein the air duct is T-shaped, a partition board is disposed in the air duct, the partition board is elastically connected to the air duct through an elastic member, the air duct is divided into an air inlet portion, a first air outlet portion, a second air outlet portion and a movable portion, the air inlet portion, the first air outlet portion, the second air outlet portion and the movable portion are movable, the air inlet portion and the movable portion are movable, the first air outlet portion is provided with a first air outlet and a first one-way valve, a third one-way valve is disposed between the air inlet portion and the movable portion, the second air outlet portion is provided with a second air outlet and a second one-way valve, an electromagnet is disposed at the top of the first air outlet portion, and the electromagnet is controlled by the starting switch and the reset switch.

6. The table saw as claimed in claim 1, wherein the pneumatic push rod mechanism comprises an outer cylinder, an inner cylinder and a push rod, the inner cylinder is slidably connected to the inner cylinder, the push rod is slidably connected to the inner cylinder, the inner cylinder has a first step and a second step at the bottom, the second step has a diameter slightly smaller than the first step, the outer cylinder has a first air inlet, the first air inlet communicates with the inside of the cylinder, the inner cylinder has a first air channel, one end of the inner cylinder is disposed at the second step, the other end of the inner cylinder is disposed at the top of the inner cavity, a second air channel is disposed inside the push rod, one end of the outer cylinder is disposed at the fourth step, the other end of the outer cylinder communicates with the second air inlet, and the tail of the second air channel is provided with a one-way valve.

7. The table saw of claim 1, wherein said guard head is beveled to facilitate pushing a workpiece into said guard for jacking up said guard.

8. The table saw of claim 1, wherein the contacts of said start, stop and reset switches are disposed above the table top of said frame.