Single motor driven dust extraction cutting, lifting device and table saw

Abstract

Single motor drive dust cutting, lifting device and table saw, the device includes motor, closed cavity, closed cavity side sets up motor, support frame, transmission mechanism and lifting mechanism; support frame one end is hinged with motor outer periphery, support frame can rotate around motor, support frame other end interval installation saw blade shaft, lifting hinge shaft; the side wall of closed cavity is opened saw shaft rotation groove; saw blade shaft one end passes through saw shaft rotation groove and is used for installing saw blade, motor rotating shaft one end installs dust collection fan blade, motor rotating shaft other end is connected with saw blade shaft other end and sets up transmission mechanism; lifting mechanism lower end is hinged with the side wall of closed cavity, and lifting mechanism upper end is connected with support frame through lifting hinge shaft; through lifting mechanism can drive support frame rotation, and support frame drives saw blade shaft along saw shaft rotation groove arc sliding. One motor of the present application can realize cutting and dust collection function simultaneously, simplifies lifting structure, utilizes the dynamic sealing of sealing baffle, guarantees dust collection efficiency and cutting accuracy.

Description

Technical Field

[0001] This invention belongs to the field of power tool technology, and relates to the performance improvement of saw blade assembly and lifting structure, especially to a single motor driven dust extraction and cutting, lifting device and table saw. Background Technology

[0002] Table saws, as a common power tool, are widely used in processing materials such as wood, plastics, and metals. Structurally, existing table saws mainly consist of a saw blade, a power system that drives the saw blade to cut, a frame, and a worktable for placing the workpiece. The saw blade, the power system that drives the saw blade to cut, and the frame are collectively referred to as the table saw body. The worktable, which can be simply called the workbench, is mainly used for support and positioning during material processing.

[0003] When a table saw cuts materials, it generates a large amount of dust and sawdust (hereinafter collectively referred to as dust). This dust is easily dispersed, negatively impacting human health; furthermore, the dust generated during processing is difficult to clean and can easily cause secondary pollution. Therefore, dust-free table saws that achieve dust removal during cutting have emerged.

[0004] Lift-type dust-free table saws adjust the cutting depth by changing the height of the saw blade, thus adapting to a wider range of material processing requirements. In existing technology, the saw blade and fan blade structures of lift-type dust-free table saws can be conventionally categorized into the following two methods: 1. Two motors are installed on the table saw body. One is a dust extraction motor, which drives the fan blade to extract dust; the other is a cutting motor, which drives the saw blade to cut.

[0005] The cutting motor moves up and down with the saw blade, while the dust extraction motor does not. This design provides good structural sealing and dust removal. However, the use of two motors results in higher costs, larger space requirements, and greater vibration, which can affect the cutting accuracy of the saw blade.

[0006] Second, a motor is installed on the table saw body, that is, a motor achieves cutting and dust collection functions through belt drive.

[0007] Because the saw blade lifts and lowers vertically, the dust inlet must also lift and lower simultaneously. The sealed chamber requires a long slot with a width slightly larger than the dust inlet and a vertical length greater than the lifting stroke, which takes up a lot of space. In addition, the lifting contact parts must be sealed when the blade is raised to the highest position and lowered to the lowest position, which is difficult to achieve.

[0008] For example, the "A Dust-Collecting Table Saw Lifting Mechanism" disclosed in Chinese Patent (Authorization Announcement No. CN204604465U) includes a screw, a nut seat, a top plate, a lifting plate, and a fixed plate. The lifting plate and the top plate are rotatably hinged to the fixed plate. The top plate has first and second sliding grooves. The lifting plate has a first pin, which is slidably fitted in the first sliding groove. The nut seat is fixed to the fixed plate. The screw is threaded into the nut seat. The head of the screw is fixed with a second pin, which is slidably fitted in the second sliding groove. The tail of the screw is equipped with a driving device. A motor is vertically fixed to the lifting plate. The output shaft of the motor passes through the through holes of the lifting plate and the fixed plate in sequence and is connected to a saw blade.

[0009] Existing single-motor driven lifting dust-free table saws have the following drawbacks: the vertical lifting structure occupies a large space, the structure is difficult to seal, and the dust collection efficiency is affected; the vibration generated by the motor is transmitted to the saw blade shaft and saw blade, affecting the cutting accuracy. Summary of the Invention

[0010] The purpose of this invention is to provide a single-motor driven dust-collecting cutting and lifting device and table saw to solve the problems of existing lifting dust-free table saws, such as the large space occupied by the saw blade lifting mechanism, difficulty in sealing, and the impact of motor vibration transmission on the cutting progress.

[0011] To achieve the above objectives, the present invention provides the following technical solution: A single-motor driven dust-collecting cutting and lifting device includes a motor and a sealed cavity. The motor is installed on one side of the sealed cavity, and a saw kerf is provided at the top of the sealed cavity for lifting the saw blade. A support frame, a transmission mechanism, and a lifting mechanism are arranged on the same side of the sealed cavity as the motor. One end of the support frame is hinged to the outer periphery of the motor and can rotate around the motor. The other end of the support frame is fitted with a saw blade shaft and a lifting hinge shaft at intervals. A saw shaft rotation groove is opened on the side wall of the sealed cavity. One end of the saw blade shaft passes through the saw shaft rotation groove and is used to install the saw blade. A dust-collecting fan is installed at one end of the motor shaft, and a transmission mechanism is provided at the other end of the motor shaft and the other end of the saw blade shaft. The motor drives the saw blade shaft and saw blade to rotate through the transmission mechanism. The dust-collecting fan is used to discharge the dust generated by the saw blade cutting from the dust outlet. The lower end of the lifting mechanism is hinged to the side wall of the sealed cavity, and the upper end of the lifting mechanism is connected to the support frame through the lifting hinge shaft. The lifting mechanism can drive the support frame to rotate, and the support frame drives the saw blade shaft to slide in an arc along the saw shaft rotation groove.

[0012] To further achieve the objectives of this invention, the following technical solution is adopted: As described above, the single-motor driven vacuuming, cutting, and lifting device includes a lifting mechanism comprising a drive module and an execution module. The drive module is equipped with a rotating shaft, which is mounted on a central rotating shaft seat for lifting. The central rotating shaft seat for lifting is fixed to the side wall of the sealed cavity. The lower end of the execution module is connected to the drive module, and the upper end of the execution module is hinged to the lifting hinge shaft. The drive module is used to drive the execution module to work.

[0013] Furthermore, in the single-motor driven dust extraction, cutting, and lifting device described above, the drive module is a lifting motor assembly or a handwheel assembly; the execution module includes a lead screw and a lead screw nut, the lead screw nut being fitted around the outer periphery of the lead screw, and the lead screw nut being connected to the lifting hinge shaft.

[0014] As described above, the single-motor driven dust extraction, cutting, and lifting device includes a transmission mechanism comprising a drive pulley, a driven pulley, and a belt. The drive pulley is fixed to the motor shaft, the driven pulley is fixed to the saw blade shaft, and the belt is fitted around the outer periphery of the drive pulley and the driven pulley.

[0015] As described above, in the single-motor driven dust-collecting cutting and lifting device, the dust-collecting fan blade is installed inside the fan blade cavity, and the fan blade cavity is fixed on the sealed cavity. Both the fan blade cavity and the sealed cavity have dust-collecting ports on the front side of the dust-collecting fan blade, and a dust outlet is provided on the outside of the fan blade cavity. The dust outlet and the dust-collecting port are connected to the saw cut.

[0016] As described above, in the single-motor driven dust extraction, cutting, and lifting device, a sealing baffle is provided on the outside of the saw shaft rotation groove. The sealing baffle is fixed to the support frame and is located between the sealing cavity and the support frame.

[0017] As described above, in the single-motor driven vacuuming, cutting, and lifting device, the side wall of the sealed cavity is provided with a guide groove, which cooperates with the front end of the lifting hinge shaft.

[0018] As described above, the single-motor driven vacuuming, cutting, and lifting device includes a sealed cavity comprising a sealed box and a sealed box cover, with the sealed box cover fastened and installed on one side of the sealed box.

[0019] A table saw includes a workbench and a table saw body. The workbench is installed on the top of the table saw body and has a saw blade groove. A single motor-driven dust extraction, cutting, and lifting device as described in any one of claims 1-8 is fixedly installed below the workbench, and the saw blade groove corresponds to the saw cut.

[0020] As described above, the table saw body is equipped with a dust collection device, and the inlet and outlet of the dust collection device are sealed together.

[0021] Compared with the prior art, the beneficial effects of the present invention are: 1. The single-motor driven dust-collecting cutting and lifting device of the present invention, structurally, uses a support frame and lifting mechanism on the outside of the sealed cavity to drive the saw blade and saw blade shaft to rise and fall, while the sealed cavity itself remains fixed and does not rise or fall with the saw blade. Therefore, the volume occupied by the lifting structure can be significantly reduced. Simultaneously, since the sealed cavity does not rise or fall, the dust collection port does not need to move, reducing the sealing components and complexity required for the lifting structure. Sealing elements are only needed on the side wall of the sealed cavity where the saw blade shaft can move, thus ensuring better dust collection efficiency.

[0022] 2. A transmission mechanism is installed on the saw blade shaft and the motor shaft. This transmission mechanism is a flexible connection structure, such as a belt, pulley, chain, or sprocket. The vibration of the motor will not be transmitted to the saw blade, thus ensuring smoother and more precise cutting.

[0023] 3. The suction fan blade at the end of the motor shaft is located outside the sealed cavity. The suction port is adapted to the suction fan blade, which can better utilize the negative pressure effect in the central area of ​​the suction fan blade. When the suction fan blade is working, a negative pressure is formed at the suction port of the sealed cavity, forcing the dust-laden airflow to enter the sealed cavity from the saw cut, and then enter the fan blade cavity through the suction port, and is discharged into the external dust collection device through the dust outlet, effectively improving the dust collection efficiency of the present invention.

[0024] 4. The support frame of this invention, acting as a carrier, can rotate around the motor. One end of the lifting mechanism can rotate around the rotating shaft and the lifting center rotating shaft seat, while the other end can rotate around the lifting hinge shaft. When the saw blade is raised or lowered, the lifting mechanism drives one end of the support frame to rotate around the motor as the axis, thereby causing the saw blade shaft and saw blade to rise and fall accordingly. The saw blade shaft moves in an arc within the saw shaft rotating groove. At this time, the entire sealed cavity, except for the saw cut and dust extraction ports, only has the saw shaft rotating groove being permeable to air. The sealing baffle can follow the arc-shaped rise and fall of the support frame. When it rises to its highest point, it can completely cover the saw shaft rotating groove. It gradually descends until the sealing baffle can no longer cover the rotating groove, maximizing the sealing effect. Attached Figure Description

[0025] Figure 1 This is a perspective view of the present invention; Figure 2 yes Figure 1 The diagram shows the saw blade shaft and saw blade raised to their highest point. Figure 3 yes Figure 2 The diagram shows the state of the saw blade shaft and saw blade descending to the lowest point. Figure 4 yes Figure 1 A three-dimensional view of the sealed cavity and the fan blade cavity described in the figure; Figure 5 yes Figure 4 Rear view; Figure 6 yes Figure 4 A schematic diagram of the internal structure.

[0026] In the picture: 1-Sealed cavity, 11-Sealed box, 12-Sealed box cover, 13-Saw cut, 14-Saw shaft rotation groove, 15-Lifting center rotation shaft seat, 16-Guide groove.

[0027] 2-Fan blade cavity, 21-Dust suction fan blade, 22-Dust suction port, 23-Dust outlet; 3-Motor; 4-Support frame, 41-Sealing baffle; 5-Transmission mechanism, 51-Driving pulley, 52-Driven pulley, 53-Belt; 6-Lifting mechanism, 61-Drive module, 62-Lead screw, 63-Lead screw nut, 64-Lifting hinge shaft, 65-Rotation shaft; 7-Saw blade; 8-Saw blade shaft. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] To facilitate the explanation of the airflow process from the saw kerf 13 to the suction port 22 in the sealed cavity 1 and fan blade cavity 2 during saw blade cutting and dust extraction by the dust extraction fan 21, Figure 2 , Figure 6 Arrows indicate the direction of airflow and / or dust-laden airflow.

[0030] Please see Figures 1-6 As shown in the figure, the single-motor driven dust extraction, cutting, and lifting device provided in this embodiment mainly includes a sealed cavity 1, a support frame 4, a lifting mechanism 6, a transmission mechanism 5, and a motor 3.

[0031] The top of the sealed cavity 1 is provided with a saw kerf 13 for raising and lowering the saw blade. The saw kerf 13 is the channel for raising and lowering the saw blade, and at the same time, it is also the air inlet for the dust suction fan 21 to connect with the outside world when suctioning dust. The sealed cavity 1 is provided with a dust suction port 22 that communicates with the dust outlet 23.

[0032] like Figures 4-6As shown, the sealed cavity 1 in this embodiment consists of a sealed box 11 and a sealed box cover 12, with the sealed box cover 12 fastened and fixed to one side of the sealed box 11. The sealed box cover 12 and the sealed box 11 work together to form the working space and protective cavity for the saw blade 7 during cutting. The overall shape and material of the sealed cavity 1 are similar to those of the sealed box in existing table saws.

[0033] by Figure 1 Taking the direction shown as an example, the motor 3 is vertically installed on one side of the sealed cavity 1, which is horizontally positioned. The motor 3 can drive the saw blade 7 for cutting and the dust suction fan 21 for dust collection.

[0034] The support frame 4, lifting mechanism 6, and transmission mechanism 5 are located on the side of the motor 3 in the sealed cavity 1.

[0035] One end of the support frame 4 is hinged to the housing of the motor 3, and the other end of the support frame 4 is fitted with the saw blade shaft 8 and the lifting hinge shaft 64 at intervals. In this structure, the support frame 4 can be rotatably mounted on the motor 3.

[0036] To reduce the space occupied by support frame 4, such as Figure 2 , Figure 3 As shown, in this embodiment, the support frame 4 is inclined upward from the end connected to the motor 3, and the other end of the support frame 4 is a free end. When the saw blade shaft 8 and the saw blade 7 are raised to the highest point, they are in a horizontal state; while when the saw blade shaft 8 and the saw blade 7 are lowered to the lowest point, the free end of the support frame 4 is a curved structure. Therefore, the volume and space occupied by the lifting mechanism 6 and the support frame 4 can be reduced, making the structure more compact.

[0037] The support frame 4 can be assembled from components, and may differ from the structure disclosed in this embodiment while meeting the above-mentioned purposes and uses.

[0038] One end of the saw blade shaft 8 passes through the wall of the sealed cavity 1 and is used to mount the saw blade 7. A saw shaft rotation groove 14 is formed on the side wall of the sealed cavity 1. The saw blade shaft 8 is rotatably mounted on the free end of the support frame 4 via bearings. Since the saw blade 7 is located inside the sealed cavity 1, the saw shaft rotation groove 14 provides guidance and limitation for the rotation of the saw blade shaft 8. In this embodiment, the saw shaft rotation groove 14 is an arc-shaped groove, which is adapted to the rotation trajectory of the support frame 4 with the motor as the axis.

[0039] A dust suction fan 21 is installed at one end of the motor shaft, and a transmission mechanism 5 is set at the other end of the motor shaft and the other end of the saw blade shaft 8. The motor 3 drives the saw blade 7 to cut and the dust suction fan 21 to suck up dust through the transmission mechanism 5. The dust suction fan 21 is used to discharge the dust generated by the saw blade 7 from the dust outlet 23.

[0040] One end of the lifting mechanism 6 is connected to the side wall of the sealed cavity 1 via a rotating shaft 65 and a lifting center rotating shaft seat 15, and the other end of the lifting mechanism 6 is connected to the support frame 4 via a lifting hinge shaft 64.

[0041] See Figure 2 , Figure 3 , Figure 5 As shown, the lifting center rotating shaft seat 15 is fixed on the sealed cavity 1, and the rotating shaft 65 is located at the lower part of the lifting mechanism 6 and installed inside the lifting center rotating shaft seat 15, thereby realizing the support and positioning of the lower part of the lifting mechanism 6.

[0042] Combined with the lifting hinge shaft 64 located on the upper part of the lifting mechanism 6, that is, both the upper and lower parts of the lifting mechanism 6 can rotate freely, the movement of the lifting mechanism 6 and the rotation of the support frame 4 are ensured to be smoother and more stable when the support frame 4 is raised or lowered.

[0043] Based on the above description of the structure and technical solution disclosed in this embodiment, it can be seen that the lifting mechanism 6 can push and pull the free end of the support frame 4 to rotate around the motor axis, and the support frame 4 drives the saw blade 7 and saw blade shaft 8 to lift in an arc shape. The arc lifting method can reduce the space required for the movement of the support frame 4 and the lifting mechanism 6.

[0044] Meanwhile, since the sealed cavity 1 does not require lifting or lowering, only a saw shaft rotation groove 14 needs to be opened on the wall of the sealed cavity 1. This saw shaft rotation groove 14 is a potential leakage point. However, compared with the saw blade lifting structure in the prior art, the sealing surface is reduced. In addition, since the saw shaft rotation groove 14 is located on the outside, it is also easier to achieve a seal for the sealed cavity 1.

[0045] like Figure 2 , Figure 3 , Figure 5 As shown, a sealing baffle 41 is provided on the outer side of the saw shaft rotation groove 14 in this embodiment. The sealing baffle 41 is disposed between the sealing cavity and the support frame 4. The sealing baffle is fixed on the support frame 4 and moves synchronously with the support frame 4.

[0046] The sealing baffle 41 is a flexible baffle or a rigid baffle, which can completely cover the saw shaft rotation groove 14 when the support frame 4 is rotated to the highest position.

[0047] like Figure 2 As shown, when the saw blade 7 is raised to its highest point, the sealing baffle 41 can completely cover the saw shaft rotation groove 14. At this time, the sealed cavity 1 is in a completely sealed state, and the dust collection efficiency reaches its maximum.

[0048] like Figure 3 As shown, when the saw blade 7 gradually descends, the sealing baffle 41 moves accordingly. Although the upper part of the saw shaft rotation groove 14 gradually protrudes, within the effective stroke range of the saw blade 7, the sealing baffle 41 can always block the saw shaft rotation groove 14 to the greatest extent and maintain the negative pressure in the sealed cavity 1.

[0049] Compared to existing technologies that require opening long holes in the vertical direction and are difficult to seal, this embodiment achieves dynamic sealing with an arc-shaped lifting mechanism and a sealing baffle 41, which can effectively improve the dust collection effect.

[0050] As the saw blade 7 gradually descends to its lowest point, it is completely retracted into the sealed cavity 1. At this point, the saw blade 7 can no longer perform cutting work and is in a hidden state, so there is no need for dust collection.

[0051] By completely storing and concealing the saw blade 7, the problem of the saw blade 7 not being assembled during current table saw transportation, but being packaged separately with the main body of the table saw, requiring users to manually install the saw blade 7 upon receipt, increasing the inconvenience of use, can be solved. The ability to store and conceal the saw blade 7 also facilitates the protection and safety of the saw blade during equipment movement after it is assembled.

[0052] The lifting mechanism 6 includes a drive module 61 and an execution module. The drive module 61 is mounted on the lifting center rotating shaft seat 15 via a rotating shaft 65. The lower end of the execution module is connected to the drive module 61, and the upper end of the execution module is connected to the lifting hinge shaft 64. The drive module 61 is used to drive the execution module to work.

[0053] For example Figures 1-3 As shown, the drive module 61 is a lifting motor assembly or a handwheel assembly. The actuation module includes a lead screw 62 and a lead screw nut 63. The lead screw nut 63 is engaged and fitted around the outer periphery of the lead screw 62, and the lead screw nut 63 is fixed to the lifting hinge shaft 64.

[0054] The transmission mechanism 5 in this embodiment includes a drive pulley 51, a driven pulley 52, and a belt 53. The drive pulley 51 is fixed to the motor shaft, the driven pulley 52 is fixed to the saw blade shaft 8, and the belt 53 is fitted around the drive pulley 51 and the driven pulley 52.

[0055] The belt drive is a flexible connection, which has the advantage of absorbing the high-frequency vibration generated when the motor 3 is running, preventing the vibration from being directly transmitted to the saw blade shaft 8, thus ensuring the flatness and precision of the saw blade cutting.

[0056] like Figure 1 , Figure 6 As shown, in this embodiment, the dust suction fan blade 21 is disposed inside the fan blade cavity 2, and the fan blade cavity 2 is fixed on the sealed cavity 1. The fan blade cavity 2 and the sealed cavity 1 have a dust suction port 22 at the longitudinal front end of the dust suction fan blade 21, and a dust outlet 23 is disposed on the transverse outer side of the fan blade cavity 2. The dust outlet 23 and the dust suction port 22 are connected to the saw cut 13.

[0057] By configuring the fan blade cavity 2 and adapting the suction port 22 to the suction fan blade 21, the negative pressure effect in the central area of ​​the suction fan blade 21 can be better utilized. When the suction fan blade 21 is working, a negative pressure is formed at the suction port 22 of the sealed cavity 1, forcing the dust-laden airflow to enter the sealed cavity from the saw cut 13, and then through the suction port 22 into the fan blade cavity 2, and finally discharged from the dust outlet 23 into the external dust collection device.

[0058] See also Figure 2 , Figure 3 , Figure 5 As shown, in order to ensure the stability of the lifting mechanism 6 when it is raised or lowered and the lifting hinge shaft 64 when it rotates with the support frame 4, this embodiment provides a guide groove 16 on the outer wall of the sealed cavity 1, and the guide groove 16 cooperates with the front end of the lifting hinge shaft 64.

[0059] By utilizing the guiding and limiting function of the guide groove 16, when the lifting mechanism 6 raises the end of the support frame 4 that is rotated by the motor, the end of the lifting hinge shaft 64 can rotate and move within the guide groove 16, thereby stabilizing the movement of the lifting mechanism 6 and the support frame 4 and improving the accuracy of lifting the saw blade 7. Conversely, the process and effect are the same when the lifting mechanism 6 is lowering.

[0060] The single-motor driven dust-collecting cutting and lifting device in this embodiment achieves both cutting and dust-collecting functions with a single motor. The single-motor drive structure is compact and low-cost, eliminating the need for a separate dust-collecting motor and reducing space occupation. Dynamic sealing during the saw blade lifting process is achieved by using the sealed cavity 1 in conjunction with the lifting mechanism 6, support frame 4, and sealing baffle 41.

[0061] Based on the working process and purpose, the technical solution of this device can be divided into a negative pressure dust collection system, a cutting transmission system, and a lifting system.

[0062] 1. Negative pressure dust collection system Structurally, it includes a sealed cavity 1, a fan blade cavity 2, a dust suction fan blade 21, and a motor 3.

[0063] During operation, the motor 3 rotates, driving the suction fan 21 to rotate at high speed, creating negative pressure inside the sealed cavity 1. The negative pressure forces the dust generated by the saw blade 7 through the only inlet, the saw cut 13, into the sealed cavity 1, and then through the suction port 22 and the fan blade cavity 2, finally being discharged from the dust outlet 23.

[0064] 2. Cutting transmission system Structurally, it includes a drive pulley 51, a belt 53, a driven pulley 52, a saw blade shaft 8, a saw blade 7, and a support frame 4.

[0065] During operation, motor 3 drives saw blade shaft 8 and saw blade 7 to rotate via belt 53 for cutting. The entire support frame 4, saw blade shaft 8, and saw blade 7 rotate around the motor, enabling the saw blade 7 to rise and fall.

[0066] 3. Lifting system Structurally, it includes a drive module 61, a lead screw 62, a lead screw nut 63, a lifting hinge shaft 64, and a rotating shaft 65.

[0067] During operation, the drive module 61 in the lifting mechanism 6, such as the lifting motor, drives the lead screw 62 to rotate, which in turn drives the lead screw nut 63, which is hinged to the support frame 4, to rise and fall, thereby realizing the arc-shaped lifting and lowering movement of the saw blade 7. Both the drive module 61 and the lead screw nut 63 are rotatable, making the operation of the lifting mechanism 6 more flexible.

[0068] This embodiment uses a single motor to achieve both cutting and dust extraction functions, fundamentally reducing vibration caused by multiple motors. An arc-shaped lifting mechanism rotating around motor 3 ensures that only the saw shaft rotation groove 14 requires sealing. Furthermore, a sealing baffle 41, moving synchronously with the support frame 4, maximizes the coverage of the saw shaft rotation groove 14 during saw blade lifting, achieving a superior dynamic sealing effect.

[0069] The motor 3 and the saw blade shaft 8 adopt a flexible transmission method, which can effectively isolate and absorb the vibration generated by the motor 3 during operation, and prevent the vibration from being directly transmitted to the saw blade 7, thereby ensuring the stability and accuracy of the cutting process.

[0070] This invention discloses a table saw, including a worktable and a table saw body. The worktable is installed on top of the table saw body and has a saw blade groove. A single-motor driven dust extraction, cutting, and lifting device of this embodiment is fixedly installed on the bottom surface of the worktable, and the saw blade groove corresponds to the saw kerf 13. The table saw body is equipped with a dust collection device, and the inlet of the dust collection device is sealed to the dust outlet 23.

[0071] The workbench and table saw body can adopt the structure of existing technology, which will not be described in detail here.

[0072] All technical contents not described in detail in this invention are publicly known technologies.

Claims

1. A single-motor driven dust-collecting, cutting, and lifting device, comprising a motor and a sealed cavity, wherein the motor is mounted on one side of the sealed cavity, and a saw kerf is provided at the top of the sealed cavity for lifting and lowering the saw blade, characterized in that, The sealed cavity has a support frame, a transmission mechanism, and a lifting mechanism on the same side as the motor. One end of the support frame is hinged to the outer periphery of the motor and can rotate around the motor. The other end of the support frame is fitted with a saw blade shaft and a lifting hinge shaft at intervals. A saw shaft rotation groove is opened on the side wall of the sealed cavity. One end of the saw blade shaft passes through the saw shaft rotation groove and is used to install the saw blade. A dust suction fan is installed at one end of the motor shaft. A transmission mechanism is set at the other end of the motor shaft and the other end of the saw blade shaft. The motor drives the saw blade shaft and saw blade to rotate through the transmission mechanism. The dust suction fan is used to discharge the dust generated by the saw blade cutting from the dust outlet. The lower end of the lifting mechanism is hinged to the side wall of the sealed cavity, and the upper end of the lifting mechanism is connected to the support frame through the lifting hinge shaft. The lifting mechanism can drive the support frame to rotate, and the support frame drives the saw blade shaft to slide in an arc along the saw shaft rotation groove.

2. The single-motor driven dust extraction, cutting, and lifting device according to claim 1, characterized in that, The lifting mechanism includes a drive module and an execution module; the drive module is provided with a rotating shaft, which is mounted on a lifting center rotating shaft seat, and the lifting center rotating shaft seat is fixed to the side wall of the sealed cavity; the lower end of the execution module is connected to the drive module, and the upper end of the execution module is hinged to the lifting hinge shaft, and the drive module is used to drive the execution module to work.

3. The single-motor driven dust extraction, cutting, and lifting device according to claim 2, characterized in that, The drive module is a lifting motor assembly or a handwheel assembly; the execution module includes a lead screw and a lead screw nut, the lead screw nut being fitted around the outer periphery of the lead screw, and the lead screw nut being connected to the lifting hinge shaft.

4. The single-motor driven dust extraction, cutting, and lifting device according to claim 1, characterized in that, The transmission mechanism includes a driving pulley, a driven pulley, and a belt. The driving pulley is fixed to the motor shaft, the driven pulley is fixed to the saw blade shaft, and the belt is fitted around the outer periphery of the driving pulley and the driven pulley.

5. The single-motor driven dust extraction, cutting, and lifting device according to claim 1, characterized in that, The dust-collecting fan blade is installed inside the fan blade cavity, which is fixed to the sealed cavity. Both the fan blade cavity and the sealed cavity have dust-collecting ports on the front side of the dust-collecting fan blade, and a dust outlet is provided on the outside of the fan blade cavity. The dust outlet and the dust-collecting port are connected to the saw cut.

6. The single-motor driven dust extraction, cutting, and lifting device according to claim 1, characterized in that, A sealing baffle is provided on the outside of the saw shaft rotation groove. The sealing baffle is fixed to the support frame and is located between the sealing cavity and the support frame.

7. The single-motor driven dust extraction, cutting, and lifting device according to claim 1, characterized in that, The sealed cavity is provided with a guide groove on its side wall, and the guide groove cooperates with the front end of the lifting hinge shaft.

8. The single-motor driven dust extraction, cutting, and lifting device according to claim 1, characterized in that, The sealed cavity includes a sealed box and a sealed box cover, with the sealed box cover fastened and installed on one side of the sealed box.

9. A table saw, comprising a worktable and a table saw body, wherein the worktable is mounted on top of the table saw body and has a saw blade groove, characterized in that, The single-motor driven dust extraction, cutting, and lifting device as described in any one of claims 1-8 is fixedly installed below the workbench, and the saw blade groove corresponds to the saw cut.

10. The table saw according to claim 9, characterized in that, The table saw body is equipped with a dust collection device, and the inlet and outlet of the dust collection device are sealed together.

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