CN115283749B

CN115283749B - Bench saw

Info

Publication number: CN115283749B
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: 2024-03-29
Anticipated expiration: 2041-12-29
Also published as: CN115283749A

Abstract

The invention discloses a bench saw, which comprises an electric circular saw main body, a frame, an automatic height adjusting system and an automatic gear shifting system, wherein the automatic height adjusting system comprises a shield 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 shield, the automatic gear shifting system comprises a pneumatic push rod mechanism, an inflation mechanism, a starting switch and a reset switch, the pneumatic push rod mechanism is inflated through the inflation mechanism, and a push rod of the pneumatic push rod mechanism is pushed to reach the maximum stroke to trigger a terminal shift switch to realize the switching from a low rotating speed gear to a high rotating speed gear. The height automatic adjusting system is arranged, so that the height of the saw blade can be automatically adjusted along with the height of an object, part of working procedures are reduced, and the working efficiency is improved; the automatic gear shifting system is arranged, so that the automatic gear shifting along with the load is realized, part of working procedures are reduced, and the working efficiency is improved.

Description

Bench saw

Technical Field

The invention designs a table saw, in particular to a table saw with a saw blade capable of automatically adjusting along with the height of a workpiece and automatically cutting gear positions along with the size of a load.

Background

When an operator uses the table saw, he is often unaware that the workpiece with the thickness possibly exceeding the cutting range of the circular saw blade is taken, the cutting range of the circular saw blade, namely the distance between the top edge of the circular saw blade and the working table surface, is usually pushed backwards for a certain distance, after sawing for a certain length, he only finds that the workpiece exceeds the cutting range of the circular saw blade and cannot be completely sawed, at the moment, he has to stop the machine first, then withdraw the workpiece from the circular saw blade, readjust the height of the circular saw blade extending out of the working table until the workpiece can be completely sawed, so that the operation is very inconvenient, and the workpiece is withdrawn under the condition that the workpiece cuts a part of the workpiece, the workpiece is not safe for the operator, and in addition, the operator is more time-consuming due to the increase of working procedures, so that the working efficiency is greatly reduced.

On the other hand, table saws on the current market often require manual switching of the high and low gear, and when an operator finds that the low gear is cutting the workpiece, the operator has to stop the machine first, then withdraw the workpiece from the circular saw blade, and switch the gear to cut again, so that the working efficiency is reduced as well.

Disclosure of Invention

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

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a bench saw, includes electric circular saw main part, frame, high automatic regulating system and keeps off automatic change system, high automatic regulating system includes guard shield and altitude mixture control subassembly, electric circular saw main part passes through the locating part to be fixed by on the altitude mixture control subassembly by guard shield control electric circular saw main part height, keep off automatic change system and include pneumatic push rod mechanism, inflation mechanism, start switch and reset switch, through inflation mechanism gives pneumatic push rod mechanism inflates, pneumatic push rod mechanism's push rod pushes away to reach the switching that the terminal shift switch of maximum stroke trigger realized low rotational speed keeps off to high rotational speed and keeps off.

In the above technical scheme, further, 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 adjusting part includes head rod, second connecting rod, third connecting rod, sliding rack, slip fixing base and gear group, head rod one end with the guard shield articulates the other end with the second connecting rod articulates, the second connecting rod is in longitudinal movement in the guide way on the mesa, the second connecting rod with the third connecting rod articulates, the third connecting rod with the sliding rack articulates, the sliding rack be in sliding fixing base transversely slides and with gear engagement transmission, the gear with the meshing of electric circular saw main part tooth realizes the longitudinal movement of electric circular saw main part.

In the above technical scheme, further, 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 the guide rail slider electric circular saw main part longitudinal movement's resistance, the guard shield head is the oblique angle setting, makes things convenient for the work piece to push will the guard shield jack-up.

In the above technical scheme, further, the inflation mechanism includes 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 articulates, the other end with the slider articulates, the slider is in slide in the tuber pipe, the slider embeds the cavity, set up end cap and elastomeric element in the cavity, when the ejector pad is back pulled, the tuber pipe is inside to produce negative pressure, the end cap will elastomeric element presses down, and the air gets into the tuber pipe, the slider normally moves, the tuber pipe is T type setting, set up the partition plate in the tuber pipe, the partition plate pass through elastomeric element with tuber pipe elastic connection, the tuber pipe divide into the inlet portion that the slider removed, first air-out portion, second air-out portion and partition plate movable part, 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, first air-out portion and second air-out tube and second air-out valve, first air-out portion and second air-out tube and second air-out portion are through Y type setting up with the air vent, the air vent is connected by the air-out portion is cut off switch when the air-out portion is connected with the air-out portion, the air vent is set up by the air-conditioner is opened to the air-conditioner portion.

In the above technical scheme, further, pneumatic push rod mechanism includes outer cylinder body, interior cylinder body and push rod, the inside sliding connection of outer cylinder body is arranged in to interior cylinder body, the inside sliding connection of interior cylinder body is arranged in to the push rod, interior cylinder body bottom sets up first step and second step, second step diameter slightly is less than first step, the push rod bottom sets up third step and fourth step, the outer cylinder body sets up first air intake with second air intake and in the jar, interior cylinder body sets up first air channel, and one end sets up the second step, and the other end sets up at the interior cavity top, the inside second air channel that sets up of push rod, one end set up fourth step, the other end with the second air intake communicates with each other, second air channel afterbody sets up the check valve.

The working process of the invention is as follows: an operator starts the electric circular saw, a driving gear on the electric circular saw body rotates to drive a driven gear, the sliding block reciprocates in the air pipe under the action of the driven gear of the electric circular saw body, the air is pushed into a movable part when the pushing block advances, a third one-way valve is arranged between the movable part and the air inlet part, when the pushing block retreats, negative pressure in the cavity sucks down a plug, air enters, the plug rebounds, and the reciprocating motion realizes the air charging function; an operator pushes a workpiece into a working area, the workpiece jacks up the shield, and the shield drives the height adjusting assembly to lift the electric circular saw main body, so that the automatic adjustment of the saw blade height is completed; simultaneously, the starting switch is triggered in the process of propelling 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 enter air, when the push rod is ejected to the limit position, the inner cylinder body is carried out, redundant gas is discharged from the first air inlet and enters the first air outlet through the first air outlet, when the internal pressure of the first air outlet is overlarge, the first one-way valve is opened, and if the pneumatic push rod mechanism still does not trigger the reset switch to reach the limit position, the push rod triggers the gear shifting switch, and the electric circular saw is switched to the high gear; if trigger reset switch in advance, then the solenoid valve loses power, and the partition plate resets under the extension spring effect, gas gets into first air inlet through first gas outlet, first air inlet begins to admit air, and gas gets into cavity between third step and the fourth step through first air flue and pushes back the push rod, and cylinder body resets in the back when 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 air flue and gets into second air outlet portion through the second gas outlet, and when second air outlet portion internal pressure is too big, the second check valve is opened, for making better utilization of gas resource get up, first check valve and second check valve pass through Y type trachea with the gas blowing mouth of guard shield is connected, can be at the during operation, with unnecessary gas as blowing dirt.

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

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

3. The redundant gas is used as dust blowing in the working process, so that the resources are fully utilized.

Drawings

The invention will be further described with reference to the drawings and examples.

Fig. 1 is a schematic 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 structural view of the height automatic adjustment system of the present invention.

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

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

Fig. 7 is a schematic view of the internal structure of the pneumatic push rod mechanism of the present invention in a reset state.

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

In the drawings, 1. Electric circular saw body, 11. Tooth portion, 12. Slider, 13. Guide rail, 14. Drive gear, 2. Frame, 21. Table top, 3. Height automatic adjustment system, 31. Shroud, 311. Air blowing port, 32. Height adjustment assembly, 321. First connecting rod, 322. Second connecting rod, 323. Third connecting rod, 324. Sliding rack, 325. Sliding seat, 326. Gear, 33. Fixed rod, 4. Gear automatic shift system, 41. Pneumatic push rod mechanism, 411. Outer cylinder, 412. Inner cylinder, 4121. First step, 4122. Second step, 4123. First air channel, 413. Push rod, 4131. Third step, 4132 fourth step, 4133 second vent passage, 414 first air inlet, 415 second air inlet, 416 check valve, 42 air charging mechanism, 421 driven gear, 422 fourth connecting rod, 423 air duct, 4231 air intake, 4232 first air outlet, 4233 second air outlet, 4234 movable portion, 4235 solenoid, 4236 third check valve, 424 slider, 4241 plug, 4242 elastic component, 425 partition plate, 426 first check valve, 427 second check valve, 428 first air outlet, 429 second air outlet, 43 start switch, 44 reset switch, 45 shift switch.

Detailed Description

Referring to fig. 1 to 8, a table saw includes an electric circular saw body 1, a frame 2, an automatic height adjusting system 3, and an automatic gear changing system 4.

In order to enable the saw blade height to be automatically adjusted along with the height of a workpiece, a height automatic adjusting system 3 is arranged, the height automatic adjusting system 3 comprises a shield 31 and a height adjusting component 32, the electric circular saw main body 1 is fixed on the height adjusting component 32 through a limiting piece, the height of the electric circular saw main body 1 is controlled by the shield 31, the height automatic adjusting system 3 further comprises a fixing rod 33, one end of the fixing rod 33 is rotatably connected with the shield 31, the other end of the fixing rod 33 is fixedly connected with a table top 21 of the machine frame 2, the height adjusting component 32 comprises 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 shield 31, the other end of the second 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 top 21, the third connecting rod 323 is hinged with the sliding rack 324, the sliding rack 324 transversely slides 326 and is meshed with the gear fixing seat 325, and the electric circular saw main body 1 is longitudinally meshed with the gear fixing seat.

In order to reduce the resistance of the electric circular saw to longitudinally moving, the electric circular saw main body 1 further comprises a plurality of sliding blocks 12 and a plurality of guide rails 13, the electric circular saw main body 1 is fixed on the sliding blocks 12 through limiting pieces, the guide rails 13 are fixed on the frame through fixing blocks, and the sliding blocks 12 are in sliding connection with the guide rails 13.

In order to enable the table saw to automatically switch gear positions according to the load, the interval time between the triggering of the starting switch 43 and the resetting switch 44 is used for judging the load, the longer the interval time is, the more difficult the workpiece is to be processed, the longer the distance of the push rod 413 extends, the push rod 413 extends to the limit position to trigger the gear shifting switch 45, if the interval time is shorter, the easier the workpiece is to be processed, the shorter the distance of the push rod extends to trigger the resetting switch 44, and the push rod 413 is reset to the initial position; the inflation mechanism 42 comprises a driven gear 421, a fourth connecting rod 422, an air pipe 423 and a sliding block 424, wherein the driven gear 421 is in meshed transmission with the driving gear 14 of the electric circular saw main body 1, one end of the fourth connecting rod 422 is hinged with the driven gear 421, the other end of the fourth connecting rod 422 is hinged with the sliding block 424, the sliding block 424 slides in the air pipe 423, a cavity is built in the sliding block 424, a plug 4241 and an elastic part 4242 are arranged in the cavity, when the pushing block is pulled back, negative pressure is generated in the air pipe 423, the plug 4241 presses the elastic part 4242 down, air enters the air pipe 423, the sliding block 424 normally moves, the air pipe 423 is in a T-shaped structure, a partition plate 425 is arranged in the air pipe 423, the 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 part 4231, a first air outlet part 4232, a second air outlet part 4233 and a movable part 4234 of the partition plate, the first air outlet 4232 is provided with a first air outlet 428 and a first one-way valve 426, the second air outlet 4233 is provided with a second air outlet 429 and a second one-way valve 427, the first one-way valve 426 and the second one-way valve 427 are connected with the air blowing port 311 of the shield 31 through a Y-shaped air pipe, and can use more air as dust blowing during operation, the first air outlet 428 is connected with the first air inlet 414 through a plastic hollow pipe, the second air outlet 429 is connected with the second air inlet 415 through a plastic hollow pipe, an electromagnet 4235 is arranged at the top of the first air outlet 4232, the on/off of the electromagnet 4235 is controlled by the starting switch 43 and the resetting switch 44, as shown in fig. 7, the pneumatic push rod mechanism 41 comprises an outer cylinder 411, an inner cylinder 412 and a push rod 413, the inner cylinder 412 is arranged in the outer cylinder 411 in a sliding connection, the push rod 413 is disposed in the inner cylinder 412 and is slidably connected, a first step 4121 and a second step 4122 are disposed at the bottom of the inner cylinder 412, the diameter of the second step 4122 is slightly smaller than that of the first step 4121, a third step 4131 and a fourth step 4132 are disposed at the bottom of the push rod 413, a first air inlet 414 is disposed at the outer cylinder 411 and is connected with the inside of the cylinder through a second air inlet 415, a first air channel 4123 is disposed at the inner cylinder 412, one end of the first air channel 4123 is disposed at the second step 4122, the other end of the first air channel is disposed at the top of the inner cavity, a second air channel 4133 is disposed inside the push rod 413, one end of the second air channel 4133 is disposed at the fourth step 4132, the other end of the second air channel 4133 is communicated with the second air inlet 415, and a one end of the push rod 413 is disposed with a check valve 416, as shown in fig. 8, the other end of the first air channel 4123 is communicated with a cavity formed by the third step 4131 and the fourth step 4132.

To facilitate pushing in of the workpiece to jack up the shield 31, the head of the shield 31 is provided with an oblique angle.

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

The foregoing description of the preferred embodiments of the invention is not intended to limit the invention in any way, but rather to make simple modifications, equivalent variations or modifications without departing from the technical scope of the invention.

Claims

1. The utility model provides a bench saw, includes electric circular saw main part, frame, high automatic regulating system and keeps off automatic transform system of position, its characterized in that: the automatic gear shifting system comprises a pneumatic push rod mechanism, an inflation mechanism, a starting switch and a reset switch, the pneumatic push rod mechanism is inflated through the inflation mechanism, and a push rod of the pneumatic push rod mechanism is pushed to reach the maximum stroke to trigger a terminal gear shifting switch to realize the switching from a low rotating speed gear to a high rotating speed gear; if the pneumatic push rod mechanism reaches the limit position and the reset switch is not triggered, the push rod triggers the gear shifting switch, and the electric circular saw is switched to the high gear; if the reset switch is triggered in advance, the electromagnetic valve is powered off, and the partition plate resets under the action of the tension spring;

the automatic height adjusting system further comprises a fixed rod, one end of the fixed rod is rotationally connected with the shield, the other end of the fixed rod is fixedly connected with the table top of the frame, the height adjusting 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 with the shield, the other end of the second connecting rod is hinged with the second connecting rod, the second connecting rod longitudinally moves in a guide groove on the table top, the second connecting rod is hinged with the third connecting rod, the third connecting rod is hinged with the sliding rack, the sliding rack transversely slides in the sliding fixing seat and is meshed with the gear for transmission, and the gear is meshed with the tooth part of the electric circular saw main body to realize longitudinal movement of the electric circular saw main body;

the electric circular saw body further comprises a plurality of sliding blocks and a plurality of guide rails, the electric circular saw body is fixed on the sliding blocks through limiting pieces, the guide rails are fixed on the frame through fixing blocks, the sliding blocks are in sliding connection with the guide rails, and the resistance of the electric circular saw body to longitudinal movement is reduced through the arrangement of the guide rail sliding blocks.

2. The bench saw of claim 1 wherein said inflation mechanism comprises a driven gear, a fourth connecting rod, an air duct and a slider, said driven gear is in meshed transmission with said drive gear of said electric circular saw body, one end of said fourth connecting rod is hinged to said driven gear, the other end is hinged to said slider, said slider slides in said air duct, a cavity is built in said slider, a plug and an elastic member are disposed in said cavity, when said push block is pulled back, a negative pressure is generated in said air duct, said plug presses said elastic member, air enters said air duct, and said slider moves normally.

3. The bench saw of claim 2, wherein the air pipe is in a T-shaped configuration, a partition plate is disposed in the air pipe, the partition plate is elastically connected with the air pipe through an elastic component, the air pipe is divided into an air inlet portion, a first air outlet portion, a second air outlet portion and a movable portion where the partition plate moves, 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 on-off of the electromagnet is controlled by the start switch and the reset switch.

4. The bench saw of claim 1 wherein the pneumatic push rod mechanism comprises an outer cylinder, an inner cylinder and a push rod, wherein the inner cylinder is arranged in the outer cylinder and is in sliding connection, the push rod is arranged in the inner cylinder and is in sliding connection, a first step and a second step are arranged at the bottom of the inner cylinder, the diameter of the second step is slightly smaller than that of the first step, a third step and a fourth step are arranged at the bottom of the push rod, a first air inlet is arranged in the outer cylinder through a second air inlet, a first air channel is arranged in the inner cylinder, one end of the first air channel is arranged at the second step, the other end of the first air channel is arranged at the top of the inner cavity, a second air channel is arranged in the push rod, one end of the second air channel is arranged at the fourth step, the other end of the second air channel is communicated with the second air inlet, and a one-way valve is arranged at the tail of the second air channel.

5. A table saw according to claim 1, wherein the guard head is beveled to facilitate pushing of a workpiece to lift the guard.

6. The table saw of claim 1, wherein the contacts of the start switch, stop switch and reset switch are positioned higher than the table top of the frame.