Protective device and sliding table saw

Abstract

The utility model discloses a protective device and push bench saw, including table top, circular saw blade, fixed support, height -adjusting mechanism, support frame, support strip, first baffle, second baffle and brush, and fixed support is located on the table top, height -adjusting mechanism is located on the fixed support, and support frame is located at the output of height -adjusting mechanism, and support frame bottom is equipped with first protective cover, and first protective cover is connected with the exhaust pipe, two support strips are slidably connected with first protective cover bottom respectively, first baffle is located at one end of two support strips, and the telescopic second protective cover is equipped between first baffle and first protective cover, second baffle is located at the other end of two support strips, and the telescopic third protective cover is equipped between second baffle and first protective cover, and a plurality of brushes are located at first baffle, second baffle and support strip bottom respectively, the protective device and push bench saw provided by the utility model realize the safety protection and real -time adsorption of push bench saw's function of scrap, and improve the operation safety and environmental cleanliness.

Description

Technical Field

[0001] This utility model relates to the field of sliding table saw technology, and in particular to a protective device and a sliding table saw. Background Technology

[0002] The sliding table saw is a general-purpose piece of woodworking machinery used for precision cutting of boards. It boasts advantages such as high cutting accuracy and stable processing efficiency, and is widely used in wood processing and related industries. The main working unit of the sliding table saw includes a worktable for supporting the boards to be processed, and a circular saw blade extending above the worktable surface that rotates at high speed to achieve the cutting. During operation, the operator pushes the board along the surface of the worktable, bringing it into contact with the circular saw blade to complete the cutting to the preset dimensions.

[0003] However, existing sliding table saws generally lack effective protective structures above the circular saw blade. When handling narrow boards, operators must directly push the board along its edge with their hands to ensure it moves along a pre-set path. During this process, operators are prone to accidentally inserting their hands along with the board into the saw blade's working area, leading to cuts, abrasions, and other serious accidents. Furthermore, in actual use, the circular saw blade generates fine sawdust during cutting. This sawdust flies upwards with the blade's rotation, permeating the work environment. Inhaling this sawdust can easily cause occupational health problems such as pneumoconiosis and chronic respiratory inflammation, seriously harming the operator's health.

[0004] It is evident that existing technologies still need improvement and enhancement. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a protective device and a sliding table saw, which aims to solve the technical problem of the lack of protection and dust collection structure at the exposed position of the circular saw blade in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A protective device includes a table and a circular saw blade extending above the table, and further includes: A fixed frame is installed on the tabletop; The height adjustment mechanism is mounted on a fixed frame; A support frame is located at the output end of the height adjustment mechanism and above the circular saw blade; a first protective cover is provided at the bottom of the support frame, and an exhaust pipe is connected to the top of the first protective cover; Two support bars are slidably connected to the corresponding sides of the bottom of the first protective cover, and the support bars are parallel to the rotation center line of the circular saw blade. A first baffle is located at one end of two support bars, and a retractable second protective cover is provided between the first baffle and the first protective cover; and the first protective cover and the second protective cover are connected. A second baffle is located at the other end of the two support bars; a retractable third protective cover is provided between the second baffle and the first protective cover; and the first and third protective covers are connected; and Several brushes are respectively placed at the bottom of the first baffle, the second baffle, and the two support bars.

[0007] Furthermore, both the second and third protective covers are accordion-style protective covers.

[0008] Furthermore, the corresponding sides of the first, second, and third protective covers are tilted upwards and inwards.

[0009] Furthermore, the top of the support bar has a first waist hole extending along its length, and the first protective cover is connected to the first waist hole by a first screw.

[0010] Furthermore, the first baffle and the second baffle are slidably connected to the first waist hole of the support strip by the second screw.

[0011] Furthermore, the height adjustment mechanism includes a positioning seat and a positioning component. The positioning seat is mounted on a fixed frame and has a through hole that is vertically connected. The support frame includes four vertically arranged adjusting rods, each of which is slidably connected to the inner wall of the through hole. Several positioning holes are spaced apart along the height direction on two adjacent adjusting rods. The positioning component is mounted on the positioning seat and has a positioning post at its output end that can extend into any of the positioning holes.

[0012] Furthermore, the positioning component includes a mounting base and a movable plate. The mounting base is located on the wall of the positioning base, the movable plate is located inside the mounting base, and a spring is provided between the movable plate and the bottom of the mounting base. Two positioning posts are located on the side of the mounting base away from the spring.

[0013] Furthermore, it also includes a translation mechanism, which includes two positioning rods arranged parallel to each other on the fixed frame, the positioning rods being arranged parallel to the support bars; the positioning rods are provided with slots spaced apart along their length, the slots extending to the top of the positioning rods, and the positioning seat is provided with a positioning block that matches the slots, the positioning block locking the position of the positioning seat when it is inserted into any slot.

[0014] A sliding table saw includes a frame, a worktable slidably connected to the frame, and a protective device. The worktable is located beside the table surface, and the direction of movement of the worktable is perpendicular to the support bar.

[0015] Beneficial effects: This utility model provides a protective device and a sliding table saw. Multiple protective covers cover the circular saw blade, and its rigid frame structure provides a clear warning to operators when approaching the saw blade, preventing accidental hand contact and reducing the risk of accidents. An external air purification system is connected to the exhaust duct to remove debris in real time, while brushes are pressed against the table surface or the upper surface of the board to prevent debris from leaking out from the bottom gaps, reducing dust in the working environment. In addition, the height of the support frame can be adjusted by the height adjustment mechanism to accommodate boards of different thicknesses to be cut, and the sliding support bar can move the baffle, allowing the second and third protective covers to extend and retract accordingly, meeting diverse cutting operation needs. Attached Figure Description

[0016] Figure 1 Structural diagram of the protective device provided by this utility model; Figure 2 A side sectional view of the protective device provided by this utility model; Figure 3 Exploded view of the protective device provided by this utility model; Figure 4 Exploded view of the height adjustment mechanism in the protective device provided by this utility model; Figure 5 Structural diagram of the second protective cover provided by this utility model; Figure 6 The structural diagram of the sliding table saw provided by this utility model.

[0017] Reference numerals: Tabletop 1, Circular saw blade 11, Fixing frame 2, Height adjustment mechanism 3, Positioning seat 31, Through hole 311, Positioning block 312, Third waist hole 313, Positioning assembly 32, Positioning column 321, Mounting seat 322, Movable plate 323, Spring 324, Guide column 325, Handle 326, Support frame 4, First protective cover 41, Exhaust pipe 42, Adjusting rod 43, Positioning hole 431, Support bar 5, First waist hole 51, First screw 52, ​​Second screw 53, First baffle 6, Second protective cover 61, Outer shell 611, Inner shell 612, Second waist hole 613, Third screw 614, Second baffle 7, Third protective cover 71, Brush 8, Translation mechanism 9, Positioning rod 91, Slot 92, Frame 10, Workbench 101. Detailed Implementation

[0018] This utility model provides a protective device and a sliding table saw. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0019] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this utility model. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0020] Please see Figures 1 to 5 As shown, this utility model provides a protective device that is adapted to be installed on a sliding table saw, specifically a sliding table saw of model MJ113TD. This model of sliding table saw has an adjustment function, which can adjust the installation height and tilt angle of the circular saw blade 11 through the adjustment mechanism: adjusting the height of the circular saw blade 11 can adapt to the cutting needs of plates of different thicknesses, and adjusting the tilt angle of the circular saw blade 11 can realize the bevel cutting of the plate, meeting diverse processing scenarios.

[0021] The protective device includes the original table surface 1 of the sliding table saw and a circular saw blade 11 extending above the table surface 1. The distance between the bottom of the blade and the table surface 1 is slightly greater than the thickness of the board to be cut, ensuring that the board can pass smoothly through the circular saw blade 11 during the cutting process without affecting normal cutting operations. The rigid structure of the protective device has a warning function. When the operator pushes the board close to the circular saw blade 11, the rigid structure can remind the operator that they are close to the position of the circular saw blade 11 and need to pay special attention to the placement of their hands to avoid accidentally touching the saw blade. At the same time, the protective device is connected to the dust collection system of the production workshop. This dust collection system is within the scope of existing technology, specifically an air purification system uniformly configured in the factory. It is connected to the protective device through a dedicated pipe. With the help of the negative pressure suction generated by the exhaust fan in the system, it can promptly absorb the debris generated at the workstation during the cutting of the circular saw blade 11 into the air purification system, effectively reducing the residual sawdust in the working environment.

[0022] The protective device also includes a fixed frame 2, a height adjustment mechanism 3, a support frame 4, two support bars 5, a first baffle 6, a second baffle 7, and several brushes 8; the fixed frame 2 is mounted on the table surface 1; the height adjustment mechanism 3 is mounted on the fixed frame 2; the support frame 4 is mounted at the output end of the height adjustment mechanism 3 and is located above the circular saw blade 11; the bottom of the support frame 4 is provided with a first protective cover 41, and the top of the first protective cover 41 is connected to an exhaust pipe 42, which is connected to a dedicated pipe of the air purification system; the two support bars 5 are slidably connected to the corresponding sides of the bottom of the first protective cover 41, and the support bars 5 are parallel to the rotation center line of the circular saw blade 11; the first baffle 6 is located at one end of the two support bars 5. A retractable second protective cover 61 is provided between the first baffle 6 and the first protective cover 41; and the first protective cover 41 and the second protective cover 61 are connected. Specifically, the first baffle 6 is located on the side of the circular saw blade 11 near the worktable 101 of the push saw. The second baffle 7 is located at the other end of the two support bars 5, and a retractable third protective cover 71 is provided between the second baffle 7 and the first protective cover 41; and the first protective cover 41 and the third protective cover 71 are connected. Several brushes 8 are respectively provided at the bottom of the first baffle 6, the second baffle 7 and the two support bars 5. Specifically, several brushes 8 are detachably provided on the first baffle 6, the second baffle 7 and the support bars 5 by screws. The brushes 8 are made of wear-resistant nylon material.

[0023] Before actual operation, the height of the support frame 4 can be adjusted by the height adjustment mechanism 3 according to the thickness of the board to be cut, so that the distance between the bottom of the first protective cover 41 and the table surface 1 is slightly greater than the thickness of the board, ensuring that the board can be smoothly cut by the circular saw blade 11; at the same time, according to the tilt angle of the circular saw blade 11 or the cutting allowance width of the board, the two support bars 5 can be slid along the bottom of the first protective cover 41, driving the first baffle 6 and the second baffle 7 to move synchronously. At this time, the second protective cover 61 and the third protective cover 71 will extend and retract accordingly with the movement of the baffles until the entire protective cover can cover the working area of ​​the circular saw blade 11 on the cutting path of the board. Specifically, when the tilt angle of the circular saw blade 11 is larger, the unfolded length of the third protective cover 71 will be correspondingly longer, ensuring that the circular saw blade 11 is always within the protective range enclosed by the protective cover. Conversely, when the unfolded lengths of the second protective cover 61 and the third protective cover 71 are similar, the exhaust pipe 42 is located in the middle of the protective range. When the cutting allowance of the plate is small, the unfolded length of the second protective cover 61 is correspondingly reduced, allowing the side edge of the plate to be exposed outside the second protective cover 61, making it easier for the operator to place their hands on the edge of the plate outside the second protective cover 61 and apply force to push the plate. Conversely, when the unfolded lengths of the second protective cover 61 and the third protective cover 71 are similar, the exhaust pipe 42 is located in the middle of the protective range.

[0024] During operation, the operator pushes the board along the table 1. The brushes 8 at the bottom of the support bar 5, the first baffle 6, and the second baffle 7 will fit tightly against the table 1 or the upper surface of the board, preventing debris from leaking out from the gaps at the bottom of the protective device. The debris generated by the circular saw blade 11 is thrown out at high speed and enters the interconnected first protective cover 41, second protective cover 61, and third protective cover 71. It is then introduced into the factory's air purification system through the exhaust pipe 42 at the top of the first protective cover 41 (the system creates negative pressure through pipes and internal exhaust fans to adsorb debris), thereby quickly removing the debris. In addition, the rigid frame structure of the protective device (such as the support bar 5, the bottom of the first baffle 6 and the second baffle 7, and the brushes 8) will provide a visual warning to the operator when the board or the human body gradually approaches the circular saw blade 11, reminding them to pay attention to the position of their hands and avoid their hands from getting close to the working area of ​​the circular saw blade 11 along with the board.

[0025] In a preferred embodiment, see [reference] Figure 1 Both the second protective cover 61 and the third protective cover 71 are accordion-style protective covers. Accordion-style protective covers have strong telescopic capabilities, flexibly adapting to the sliding adjustment range of the support bar 5 and the baffle. Simultaneously, the flexible pleated structure of the accordion-style protective cover, during telescopic movement, can tightly fit the connection between the first protective cover 41 and the baffle, maintaining the airtight connection between the three, effectively preventing cutting debris from leaking out from the joint gaps, further ensuring the dust collection effect of the dust extraction system; and its material has a certain degree of wear resistance, able to withstand minor collisions or friction that may occur in the workshop working environment, extending the service life of the protective cover.

[0026] In other embodiments, see Figure 5 The second protective cover 61 and the third protective cover 71 each include an outer shell 611 and an inner shell 612 fitted inside the outer shell 611, with the outer shell 611 and the inner shell 612 slidably connected. The outer shell 611 has a second waist hole 613 extending along its length, which is connected to the inner shell 612 by a third screw 614. One end of the outer shell 611 is connected to the first protective cover 41, and the other end of the inner shell 612 is connected to a baffle. When the inner shell 612 moves along the outer shell 611, the telescopic length of the second protective cover 61 and the third protective cover 71 can be adjusted.

[0027] In a preferred embodiment, see [reference] Figure 1The first protective cover 41, the second protective cover 61, and the third protective cover 71 have corresponding sides that slope upwards and inwards. Specifically, the bottom length of the protective cover is greater than the diameter of the circular saw blade 11, which can completely cover the projection area of ​​the circular saw blade 11 on the table surface 1, ensuring that the exposed area of ​​the circular saw blade 11 during cutting is all within the protective cover, avoiding blind spots caused by incomplete coverage, and further reducing the risk of operators accidentally touching the saw blade. At the same time, the top-narrow and bottom-wide structure can effectively reduce the internal space of the protective cover, reduce the ineffective space inside the protective cover, and make the negative pressure formed after the exhaust pipe 42 is connected more concentrated, improving the chip collection efficiency.

[0028] In a preferred embodiment, see [reference] Figure 3 The support bar 5 has a first waist hole 51 extending along its length at its top, and the first protective cover 41 is connected to the first waist hole 51 by a first screw 52. This configuration allows for adjustment of the relative position between the support bar 5 and the first protective cover 41. During adjustment, loosening the first screw 52 allows the support bar 5 to be pushed along the length of the first waist hole 51, causing it to slide relative to the first protective cover 41. This movement causes the first baffle 6, the second baffle 7, and the corresponding second and third protective covers 61 to move synchronously; the second protective cover 61 unfolds and the third protective cover 71 retracts; or the second protective cover 61 unfolds and the third protective cover 71 retracts. After the support bar 5 reaches the target position, tightening the first screw 52 locks its relative position to the first protective cover 41, preventing displacement of the support bar 5 due to vibration during operation and ensuring the protective stability of the cover.

[0029] Further, see Figure 3The first baffle 6 and the second baffle 7 are slidably connected to the first waist hole 51 of the support bar 5 by the second screw 53. This arrangement provides a flexible and independent operating space for adjusting the position of the first baffle 6 and the second baffle 7. During adjustment, the second screw 53 on the first baffle 6 is loosened, allowing the first baffle 6 to slide freely along the first waist hole 51 at the top of the support bar 5. This causes the second protective cover 61 between the first baffle 6 and the first protective cover 41 to extend and retract synchronously, achieving precise adjustment of the extended length of the second protective cover 61 to accommodate the cutting allowance requirements of different widths of boards. For example, when processing narrow boards, the first baffle 6 can be moved closer to the circular saw blade 11 to shorten the extended length of the second protective cover 61, exposing the edge of the board for easier gripping. Similarly, when adjusting the second baffle 7, the corresponding second screw 53 is loosened, and sliding along the first waist hole 51 causes the third protective cover 71 to extend and retract. The coverage area of ​​the third protective cover 71 is adjusted according to the change in the tilt angle of the circular saw blade 11, ensuring that the saw blade is still effectively protected during tilted cutting. Throughout the adjustment process, the adjustment of the first baffle 6 and the second baffle 7 does not interfere with each other. The operator can adjust the position of the two baffles independently according to the characteristics of the board and the state of the saw blade in the actual processing scenario, so as to control the overall protection range of the entire protective cover and ensure the adsorption effect of the debris.

[0030] Preferably, the top of the support bar 5 is provided with an L-shaped connecting part, the first waist hole 51 is provided in the vertical section of the connecting part, and the bottom of the first protective cover 41 abuts against the horizontal section of the connecting part; the second protective cover 61 and the third protective cover 71 are both provided between the two connecting parts to ensure the sealing between the second protective cover 61 and the third protective cover 71 and the support bar 5.

[0031] In a preferred embodiment, see [reference] Figure 3 , 4The height adjustment mechanism 3 includes a positioning seat 31 and a positioning component 32. The positioning seat 31 is mounted on the fixed frame 2 and has a through hole 311 that connects vertically. The support frame 4 includes four vertically arranged adjusting rods 43. The area enclosed by the four adjusting rods 43 is used to install the exhaust pipe 42, ensuring the stable installation of the exhaust pipe 42. The exhaust pipe 42 is a flexible steel wire hose that can move up and down with the support frame 4. Each adjusting rod 43 is slidably connected to the inner wall of the through hole 311, specifically through a guide rail or a slider. Several positioning holes 431 are spaced apart along the height direction on two adjacent adjusting rods 43. The positioning component 32 is mounted on the positioning seat 31, and the output end of the positioning component 32 has a positioning post 321 that can extend into any of the positioning holes 431. When the height of the support frame 4 and the first protective cover 41 needs to be adjusted according to the thickness of the material to be cut, first operate the positioning component 32 to disengage the positioning pin 321 from the currently inserted positioning hole 431, releasing the lock on the adjusting rod 43. At this time, the four adjusting rods 43 can slide vertically along the inner wall of the through hole 311 of the positioning seat 31, driving the support frame 4 and the bottom first protective cover 41 to move up and down synchronously. After adjusting to the target height, operate the positioning component 32 to re-insert the positioning pin 321 into the corresponding height positioning hole 431. Through the snap-fit ​​cooperation between the positioning pin 321 and the positioning hole 431, the position of the adjusting rod 43 is fixed, thereby locking the height of the support frame 4 and the protective cover. By setting several spaced positioning holes 431, multiple height options can be provided to meet the cutting protection needs of materials of different thicknesses.

[0032] Further, see Figure 4The positioning component 32 includes a mounting base 322 and a movable plate 323. The mounting base 322 is located on the wall of the positioning base 31, and the movable plate 323 is located inside the mounting base 322. A spring 324 is provided between the movable plate 323 and the bottom of the mounting base 322. Two positioning posts 321 are located on the side of the mounting base 322 away from the spring 324. Specifically, the movable plate 323 has two guide posts 325 that are slidably connected to the mounting base 322. A spring 324 is fitted onto one guide post 325, and its two ends abut against the bottom of the mounting base 322 and the movable plate 323, respectively. The movable plate 323 has a handle 326 extending outside the mounting base 322. In its natural state, the spring force of the spring 324 pushes the movable plate 323 to move closer to the adjusting rod 43, so that the two positioning posts 321 are stably inserted into the positioning holes 431 of the adjusting rod 43, thereby achieving real-time locking of the adjusting rod 43. When the height of the protective cover needs to be adjusted, the operator pulls the handle 326 outward. The handle 326 drives the movable plate 323 to slide away from the adjusting rod 43 along the guide post 325. The spring 324 is compressed, and the two positioning posts 321 move outward synchronously with the movable plate 323 until they are completely disengaged from the positioning hole 431, thus releasing the lock on the adjusting rod 43. When the height is adjusted to the correct position, the operator releases the handle 326. The spring 324 pushes the movable plate 323 back to its original position due to the rebound force, and the positioning posts 321 then re-enter the positioning hole 431 at the corresponding height, completing the locking of the adjusting rod 43.

[0033] Preferably, see Figure 4 The positioning seat 31 has two vertically extending third waist holes 313 on its side wall. Each third waist hole 313 corresponds to a positioning post 321, and the positioning post 321 extends into the positioning hole 431 after passing through the third waist hole 313. By setting the third waist holes 313, the operator can directly observe the specific position of each positioning hole 431 on the adjusting rod 43 through the third waist holes 313, which facilitates accurate judgment of the alignment between the positioning post 321 and the positioning hole 431 when adjusting the height of the support frame 4, and avoids blind operation.

[0034] In the above embodiments, see Figure 1 , 3It also includes a translation mechanism 9, which includes two positioning rods 91 arranged parallel to each other on the fixed frame 2. The positioning rods 91 are arranged parallel to the support bar 5. The positioning rods 91 are provided with slots 92 arranged at intervals along their length direction. The slots 92 extend to the top of the positioning rods 91. The positioning seat 31 is provided with a positioning block 312 that matches the slots 92. When the positioning block 312 is inserted into any slot 92, the position of the positioning seat 31 is locked. When it is necessary to adjust the position of the entire protective device on the table 1 according to the cutting position of the circular saw blade 11, that is, to adjust the position of the exhaust pipe 42 and the first protective cover 41 to the area where the most debris is generated. The location of debris flying varies depending on whether the circular saw blade 11 is installed vertically or at an angle. The operator only needs to lift the positioning seat 31 upwards. The positioning block 312 at the bottom of the positioning seat 31 will disengage from the currently inserted slot 92 as the positioning seat 31 is lifted, releasing the position lock between the positioning seat 31 and the positioning rod 91. Then, the positioning seat 31 is moved a distance, and the protective device moves synchronously, moving the first protective cover 41 to the target position. Finally, the positioning seat 31 is lowered, allowing the positioning block 312 on the positioning seat 31 to naturally fall into the corresponding slot 92. Through the insertion and engagement of the positioning block 312 and the slot 92, the position of the positioning seat 31 is relocked. The entire process is simple and convenient, quickly aligning the protective device with the area where the circular saw blade 11 generates the most debris, further improving the dust collection efficiency of the dust extraction system.

[0035] Preferably, each positioning block 312 has a guide surface on its sidewall, which facilitates quick alignment and smooth insertion of the positioning block 312 with the slot 92 of the positioning rod 91.

[0036] See Figure 6 This utility model also provides a sliding table saw, including a frame 10, a worktable 101 slidably connected to the frame 10, and the aforementioned protective device. The worktable 101 is located beside the tabletop 1, and the direction of movement of the worktable 101 is perpendicular to the support bar 5. During operation, the operator can push the worktable 101 to slide along the frame 10, causing the material to be cut to smoothly approach the circular saw blade 11 above the tabletop 1, achieving precise cutting of the material. Combined with the protective device, it can prevent the operator's hand from accidentally touching the circular saw blade 11, reducing the risk of safety accidents; it can collect cutting debris in a timely manner, reducing dust in the working environment; and it can also flexibly adjust the height, position, and length of the protective cover to adapt to different thicknesses of materials and cutting needs.

[0037] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of the appended claims of this utility model.

Claims

1. A guard comprising a table top (1) and a circular saw blade (11) extending above the table top (1), characterized in that, Also includes: A fixed frame (2) is installed on the table (1); The height adjustment mechanism (3) is mounted on the fixed frame (2); The support frame (4) is located at the output end of the height adjustment mechanism (3) and above the circular saw blade (11); the bottom of the support frame (4) is provided with a first protective cover (41), and the top of the first protective cover (41) is connected to an exhaust pipe (42). Two support bars (5) are slidably connected to the bottom sides of the first protective cover (41) respectively, and the support bars (5) are parallel to the rotation center line of the circular saw blade (11). The first baffle (6) is located at one end of the two support bars (5), and a retractable second protective cover (61) is provided between the first baffle (6) and the first protective cover (41); and the first protective cover (41) and the second protective cover (61) are connected. A second baffle (7) is located at the other end of the two support bars (5), and a retractable third protective cover (71) is provided between the second baffle (7) and the first protective cover (41); and the first protective cover (41) and the third protective cover (71) are connected; and Several brushes (8) are respectively placed at the bottom of the first baffle (6), the second baffle (7) and the two support bars (5).

2. The guard of claim 1, wherein The second protective cover (61) and the third protective cover (71) are both accordion-style protective covers.

3. The guard of claim 1, wherein The first protective cover (41), the second protective cover (61) and the third protective cover (71) have corresponding sides that are tilted upward and inward.

4. The guard of claim 1, wherein The top of the support bar (5) is provided with a first waist hole (51) extending along its length direction, and the first protective cover (41) is connected to the first waist hole (51) by a first screw (52).

5. The protective device according to claim 4, characterized in that, The first baffle (6) and the second baffle (7) are slidably connected to the first waist hole (51) of the support bar (5) by the second screw (53).

6. The protective device according to claim 1, characterized in that, The height adjustment mechanism (3) includes a positioning seat (31) and a positioning component (32). The positioning seat (31) is mounted on the fixed frame (2), and a through hole (311) is provided in the positioning seat (31) that is connected vertically. The support frame (4) includes four vertically arranged adjusting rods (43). Each adjusting rod (43) is slidably connected to the inner wall of the through hole (311). Several positioning holes (431) are arranged at intervals along the height direction on two adjacent adjusting rods (43). The positioning component (32) is mounted on the positioning seat (31), and the output end of the positioning component (32) is provided with a positioning post (321) that can extend into any positioning hole (431).

7. The protective device according to claim 6, characterized in that, The positioning component (32) includes a mounting base (322) and a movable plate (323). The mounting base (322) is located on the wall of the positioning base (31), and the movable plate (323) is located inside the mounting base (322). A spring (324) is provided between the movable plate (323) and the bottom of the mounting base (322). Two positioning posts (321) are located on the side of the mounting base (322) away from the spring (324).

8. The protective device according to claim 6, characterized in that, It also includes a translation mechanism (9), which includes two positioning rods (91) arranged in parallel on the fixed frame (2). The positioning rods (91) are arranged in parallel with the support bar (5). The positioning rods (91) are provided with slots (92) arranged at intervals along their length direction. The slots (92) extend to the top of the positioning rods (91). The positioning seat (31) is provided with a positioning block (312) that matches the slots (92). When the positioning block (312) is inserted into any slot (92), the position of the positioning seat (31) is locked.

9. A sliding table saw, characterized in that, It includes a frame (10), a worktable (101) slidably connected to the frame (10), and a protective device as described in any one of claims 1-8. The worktable (101) is located on the side of the table surface (1), and the moving direction of the worktable (101) is perpendicular to the support bar (5).

Images