Automatic braking wood-working mechanical device

Abstract

The invention provides an automatic braking wood-working mechanical device, and relates to the technical field of wood-working machinery. The automatic braking wood-working mechanical device comprises a rack, a workbench is fixedly installed at the top of the rack, and a cutting assembly is jointly installed between the inner bottom of the rack and the workbench; a hydraulic injection cylinder is fixedly installed on one side of the inner bottom of the rack, a push-pull assembly is installed on the top of the hydraulic injection cylinder, the output end of the hydraulic injection cylinder is fixedly connected with an arc-shaped seat, and the arc-shaped seat is fixedly connected with the rack. Through the arrangement of the push-pull assembly, the arc-shaped seat, the hydraulic injection cylinder, the cavity, the hydraulic pushing assembly, an arc-shaped groove, a brake pad, a brake disc, a short single-side safety optical grating and a long single-side safety optical grating, when an operator cuts a wooden product, after the hand moves to a cutting area, the device can automatically brake a saw blade, and the saw blade is prevented from being damaged. The saw blade is prevented from rotating at a high speed to hurt hands of an operator, so that injury accidents are prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of woodworking machinery, and particularly to an automatic braking device for woodworking machinery. Background Art

[0002] Woodworking machinery refers to various mechanical equipment used for processing wood and wood products, including wood planers, wood sawing machines, wood drilling machines, wood milling machines, wood engraving machines, etc. Woodworking machinery plays an important role in the wood processing technology. It can process wood into semi-finished products and further into various wood products. There are a wide variety of these mechanical equipment, which can meet different processing requirements, such as sawing, planing, drilling, milling, engraving, etc.

[0003] Woodworking machinery can greatly improve the efficiency and quality of wood processing and is widely used in the fields of furniture, construction, decoration, art, etc.

[0004] A woodworking table saw is also one of the common woodworking machinery. When using a woodworking table saw, the operator needs to measure the size and then manually push the wood board, wood strip, etc. to move in a predetermined direction, and then cut it with an electric saw. In the actual operation process, due to the low cost of the woodworking table saw, it often does not have a protection function for woodworkers, and the cutting blade of the electric saw is exposed over a large area. Therefore, during the process of the operator pushing the wooden product to move, the hand may enter the cutting area due to the operator's own negligence or external influence, and even accidentally touch the high-speed rotating cutting blade, resulting in an injury accident.

[0005] Therefore, we have developed a new automatic braking device for woodworking machinery. Summary of the Invention

[0006] (1) Technical Problems to be Solved

[0007] Aiming at the deficiencies of the prior art, the present invention provides an automatic braking device for woodworking machinery, which solves the problems that the existing woodworking table saw has no protection function, the operator is prone to enter the cutting area, and even accidentally touch the high-speed rotating cutting blade, resulting in an injury accident.

[0008] (2) Technical Solutions

[0009] To achieve the above object, the present invention is realized through the following technical solutions: an automatic braking device for woodworking machinery, including a frame, a workbench is fixedly installed on the top of the frame, and a cutting assembly is jointly installed between the inner bottom of the frame and the workbench;

[0010] One side of the inner bottom of the frame is fixedly installed with a hydraulic injection cylinder. A push-pull assembly is installed on the top of the hydraulic injection cylinder. The output end of the hydraulic injection cylinder is fixedly connected with an arc seat, and the arc seat is fixedly connected with the frame. A chamber is formed inside the arc seat, and the chamber is communicated with the hydraulic injection cylinder. Arc grooves are formed on both inner walls of the arc seat. Hydraulic push components are jointly installed between the two arc grooves and the chamber. Brake pads are fixedly assembled at the movable ends of the two hydraulic push components. A brake disc is arranged between the two brake pads, and the brake disc is connected with the cutting assembly;

[0011] One side of the top of the workbench is fixedly installed with a fixing frame. The other end of the fixing frame is fixedly connected with a housing. A short single-sided safety grating is fixedly embedded at the bottom of the housing. Two long single-sided safety gratings are symmetrically and fixedly connected to the top of the short single-sided safety grating, and the long single-sided safety gratings are fixedly embedded at the bottom of the housing. A synchronous adjustment assembly is jointly installed between the short single-sided safety grating and the two long single-sided safety gratings;

[0012] One side of the outer surface of the housing is fixedly connected with a fixing rod. A laser distance sensor is fixedly connected to the bottom of the fixing rod;

[0013] An adjustable backrest is installed on one side of the top of the workbench.

[0014] Preferably, the cutting assembly includes a motor, and the motor is fixedly installed on the inner bottom of the frame. The driving end of the motor is fixedly connected with a large synchronous pulley, and the large synchronous pulley is fixedly connected with the brake disc. A synchronous belt is meshed and sleeved on the outer surface of the large synchronous pulley. A small synchronous pulley is meshed on one side of the inner surface of the synchronous belt. One end of the small synchronous pulley is fixedly connected with a saw blade, and the saw blade penetrates through the workbench.

[0015] Through the above scheme, when the wood products need to be cut, the motor drives the connected large synchronous pulley to rotate, so that the small synchronous pulley can be driven to rotate through the synchronous belt, and the small synchronous pulley drives the saw blade to rotate.

[0016] Preferably, a support seat is fixedly sleeved on the surface of the mounting shaft of the small synchronous pulley, and the support seat is fixedly installed at the bottom of the workbench.

[0017] Through the above scheme, the support seat has a supporting effect on the small synchronous pulley, which is beneficial to the installation of the small synchronous pulley and the saw blade.

[0018] Preferably, the push-pull assembly includes an electric push rod, and the electric push rod is fixedly installed on the top of the hydraulic injection cylinder. A connecting rod is fixedly installed at the movable end of the electric push rod, and the connecting rod is fixedly connected with the piston of the hydraulic injection cylinder.

[0019] Through the above solution, the electric push rod can push the piston to move through the connecting rod, so as to be able to extrude the hydraulic oil in the hydraulic injection cylinder.

[0020] Preferably, both of the hydraulic pushing components include two connecting grooves, and the connecting grooves communicate with the adjacent arc grooves and the chambers. An arc piston seat is slidably sealed inside the connecting groove, and the arc piston seat is fixedly connected to the adjacent brake pads.

[0021] Through the above solution, the arc piston seat is slidably sealed with the inner wall of the connecting groove. Therefore, after hydraulic oil is filled in the chamber, the hydraulic oil can enter the connecting groove and push the arc piston seat to move, and the arc piston seat can drive the brake pads connected thereto to move.

[0022] Preferably, arc-shaped plates are fixedly connected to both inner walls of the connecting groove, and a plurality of springs are fixedly connected between the two arc-shaped plates and the arc piston seat together.

[0023] Through the above solution, the cooperation of the springs and the arc-shaped plates is beneficial to the reset of the arc piston seat.

[0024] Preferably, the synchronous adjustment component includes a motor and three double pulleys. The motor is fixedly installed on one inner wall of the housing, and the three double pulleys are all rotatably connected to the inner wall of the housing. The adjustment knobs of the two long single-sided safety gratings are fixedly connected to the adjacent double pulleys respectively. The driving end of the motor is fixedly connected to the adjacent double pulley. A first belt is sleeved between two adjacent double pulleys. A second belt is sleeved on the outer surface of one of the pulleys of a single double pulley. The inner surface of the second belt abuts against a small pulley, and the small pulley is rotatably connected to the inner wall of the housing. One end of the small pulley is fixedly connected to a large bevel gear. One side of the outer surface of the large bevel gear is meshed with a small bevel gear, and the small bevel gear is fixedly connected to the adjustment knob of the short single-sided safety grating.

[0025] Through the above solution, the motor can drive the double pulley connected thereto to rotate. The double pulley drives another double pulley to rotate through the first belt, and then drives the last double pulley to rotate through another first belt, so as to drive the adjustment knobs of the two long single-sided safety gratings to rotate. At the same time, the double pulley drives the small pulley to rotate through the second belt, and then drives the adjustment knob of the short single-sided safety grating to rotate through the large bevel gear and the small bevel gear;

[0026] Wherein the adjustment knob is the detection distance adjustment knob of the single-sided safety grating.

[0027] Preferably, the adjustable backrest includes two screw rods, and the screw rods are fixedly installed on the top of the workbench. Movable frames are slidably sleeved on the outer surfaces of the two screw rods, and a backrest body is fixedly connected to one end of the two movable frames together.

[0028] Through the above solution, the backrest body has an auxiliary effect, which is beneficial for the operator to push the wooden product to move.

[0029] Preferably, compression nuts are threadedly sleeved on the outer surfaces of the two screws, and the compression nuts are pressed against the tops of the two movable frames.

[0030] Through the above solution, the cooperation between the compression nut and the screw can fix the movable frame, so as to be able to fix the backrest body.

[0031] (III) Beneficial effects

[0032] The present invention provides a woodworking machinery device with automatic braking. It has the following beneficial effects:

[0033] 1. For the woodworking machinery device with automatic braking, through the arranged push-pull assembly, arc seat, hydraulic injection cylinder, chamber, hydraulic push assembly, arc groove, brake pads, brake disc, short unilateral safety grating and long unilateral safety grating, when the operator cuts the wooden product, after the hand moves to the cutting area, the device can automatically brake the saw blade, avoiding the saw blade rotating at high speed from hurting the operator's hand, thus preventing injury accidents.

[0034] 2. For the woodworking machinery device with automatic braking, it uses the strong penetrability of the infrared light of the safety grating for safety detection, which can effectively penetrate dust and ensure the detection effect;

[0035] 3. For the woodworking machinery device with automatic braking, through the arranged laser distance sensor and synchronous adjustment assembly, after detecting the thickness of the wooden product, the detection distance of the unilateral safety grating is correspondingly adjusted, further improving its detection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a perspective view of the present invention;

[0037] Figure 2 is Figure 1 the enlarged view at A in

[0038] Figure 3 is a rear view of the present invention;

[0039] Figure 4 is a sectional view of the arc seat of the present invention;

[0040] Figure 5 is a sectional view of the housing of the present invention;

[0041] Figure 6 is a partial structural schematic diagram of the synchronous adjustment assembly of the present invention;

[0042] Figure 7 is a schematic diagram of the adjustable backrest structure of the present invention.

[0043] Among them, 1. frame; 2. motor; 3. backrest body; 4. saw blade; 5. housing; 6. fixing frame; 7. workbench; 8. large synchronous pulley; 9. brake disc; 10. arc seat; 11. connecting rod; 12. hydraulic injection cylinder; 13. support seat; 14. small synchronous pulley; 15. synchronous belt; 16. fixing rod; 17. laser distance sensor; 18. electric push rod; 19. brake pad; 20. arc plate; 21. chamber; 22. spring; 23. arc piston seat; 24. connecting groove; 25. arc groove; 26. short single-sided safety grating; 27. double pulley; 28. long single-sided safety grating; 29. first belt; 30. motor; 31. second belt; 32. small pulley; 33. small bevel gear; 34. large bevel gear; 35. screw; 36. movable frame; 37. compression nut. Specific embodiments

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0045] Embodiment:

[0046] As Figures 1-3 shown, the embodiment of the present invention provides an automatically braking woodworking machinery device, including a frame 1. A workbench 7 is fixedly installed on the top of the frame 1. The workbench 7 is used to place the wood to be processed. A cutting assembly is jointly installed between the inner bottom of the frame 1 and the workbench 7. The cutting assembly includes a motor 2, and the motor 2 is fixedly installed on the inner bottom of the frame 1. The driving end of the motor 2 is fixedly connected to a large synchronous pulley 8, and the large synchronous pulley 8 is fixedly connected to a brake disc 9. The outer surface of the large synchronous pulley 8 is meshed with a synchronous belt 15. One side of the inner surface of the synchronous belt 15 is meshed with a small synchronous pulley 14. The cooperation of the synchronous pulley and the synchronous belt 15 can prevent slipping and ensure the transmission effect. One end of the small synchronous pulley 14 is fixedly connected to a saw blade 4, and the saw blade 4 penetrates through the workbench 7. A support seat 13 is fixedly sleeved on the installation shaft surface of the small synchronous pulley 14, and the support seat 13 is fixedly installed at the bottom of the workbench 7. The setting of the support seat 13 is beneficial to the installation of the small synchronous pulley 14, and bearings are jointly installed at the rotation connection of the support seat 13 and the small synchronous pulley 14, which can reduce the rotation resistance.

[0047] As Figure 2 and Figure 3As shown in the figure, a hydraulic injection cylinder 12 is fixedly installed on one side of the inner bottom of the frame 1. A push-pull assembly is installed on the top of the hydraulic injection cylinder 12. The push-pull assembly includes an electric push rod 18, and the electric push rod 18 is fixedly installed on the top of the hydraulic injection cylinder 12. A connecting rod 11 is fixedly installed at the movable end of the electric push rod 18, and the connecting rod 11 is fixedly connected to the piston of the hydraulic injection cylinder 12. Hydraulic oil is stored in the hydraulic injection cylinder 12. The electric push rod 18 pushes the piston to move through the connecting rod 11, and the discharge and suction of the hydraulic oil can be realized.

[0048] As Figure 2 and Figure 4 shown in the figure, the output end of the hydraulic injection cylinder 12 is fixedly connected to an arc seat 10, and the arc seat 10 is fixedly connected to the frame 1. A chamber 21 is opened inside the arc seat 10, and the chamber 21 is communicated with the hydraulic injection cylinder 12. Arc-shaped grooves 25 are opened on both inner walls of the arc seat 10. Hydraulic push components are jointly installed between the two arc-shaped grooves 25 and the chamber 21. Brake pads 19 are fixedly assembled at the movable ends of the two hydraulic push components. The brake pads 19 are located in the arc-shaped grooves 25, so that the arc-shaped grooves 25 have a hidden effect on the brake pads 19. A brake disc 9 is arranged between the two brake pads 19, and the brake disc 9 is connected to the cutting assembly. The two hydraulic push components each include two connecting grooves 24, and the connecting grooves 24 are communicated with the adjacent arc-shaped grooves 25 and the chamber 21. An arc-shaped piston seat 23 is hermetically slid in the connecting groove 24. The connecting groove 24 has a limiting effect on the arc-shaped piston seat 23, which can ensure the stability of the movement of the arc-shaped piston seat 23, and the arc-shaped piston seat 23 is fixedly connected to the adjacent brake pad 19. Arc-shaped plates 20 are fixedly connected to both inner walls of the connecting groove 24. A plurality of springs 22 are jointly fixedly connected between the two arc-shaped plates 20 and the arc-shaped piston seat 23. The arrangement of the springs 22 is beneficial to the reset of the arc-shaped piston seat 23.

[0049] As Figure 1 and Figure 5As shown, a fixing frame 6 is fixedly installed on one side of the top of the workbench 7, and the other end of the fixing frame 6 is fixedly connected to a shell 5, and a short single-sided safety grating 26 is fixedly embedded at the bottom of the shell 5, and two long single-sided safety gratings 28 are symmetrically fixedly connected to the top of the short single-sided safety grating 26, and the long single-sided safety grating 28 is fixedly embedded in the bottom of the shell 5, and a synchronous adjustment component is installed between the short single-sided safety grating 26 and the two long single-sided safety gratings 28, and the synchronous adjustment component includes a motor 30 and three double pulleys 27, and the motor 30 is fixedly installed on one side inner wall of the shell 5, and the three double pulleys 27 are rotatably connected to the inner wall of the shell 5, the adjustment knobs of the two long single-sided safety gratings 28 are fixedly connected to the adjacent double pulleys 27, and the driving end of the motor 30 is connected to the adjacent double pulleys 2 7 is fixedly connected, a first belt 29 is commonly sleeved between two adjacent double pulleys 27, a second belt 31 is sleeved on the outer surface of one of the pulleys of a single double pulley 27, a small pulley 32 is abutted on the inner surface of the second belt 31, and the small pulley 32 is rotatably connected to the inner wall of the shell 5, one end of the small pulley 32 is fixedly connected to a large bevel gear 34, a small bevel gear 33 is meshedly connected to one side of the outer surface of the large bevel gear 34, and the small bevel gear 33 is fixedly connected to the adjustment knob of the short single-sided safety grating 26. The short single-sided safety grating 26 and the long single-sided safety grating 28 are both prior arts, and their models can be selected according to actual needs, so they are not limited in the text. The adjustment knob is a distance adjustment knob for the single-sided safety grating, and the detection distance of the single-sided safety grating can be adjusted by it.

[0050] Figure 3 As shown, a fixing rod 16 is fixedly connected to one side of the outer surface of the shell 5, and a laser ranging sensor 17 is fixedly connected to the bottom of the fixing rod 16. The laser ranging sensor 17 is also a prior art, and the model can be selected according to actual needs to ensure its detection effect.

[0051] Figure 1 , Figure 3 and Figure 7 An adjustable backrest is installed on one side of the top of the workbench 7. The adjustable backrest includes two screws 35, and the screws 35 are fixedly installed on the top of the workbench 7. The outer surfaces of the two screws 35 are slidably sleeved with movable frames 36, and one end of the two movable frames 36 is commonly fixedly connected with the backrest body 3. The outer surfaces of the two screws 35 are threadedly sleeved with clamping nuts 37, and the clamping nuts 37 are crimped on the tops of the two movable frames 36. When it is necessary to adjust the position of the backrest body 3, the two clamping nuts 37 are loosened, the clamping nuts 37 move up, and the clamping limit on the movable frame 36 is released, and then the backrest body 3 is moved. The backrest body 3 drives the two movable frames 36 to move along the screws 35 until the backrest body 3 moves to the set position, and then the clamping nuts 37 are tightened again.

[0052] Working principle: During use, a dust suction device can be assembled for use to reduce dust, improve the cutting environment and the use environment of the unilateral safety grating, and ensure the use effect of the unilateral safety grating; the operator starts to cut the plate, starts the whole unit, and the laser distance sensor 17, short unilateral safety grating 26, long unilateral safety grating 28 and motor 2 are started. The motor 2 drives the large synchronous pulley 8 to rotate. The large synchronous pulley 8 drives the small synchronous pulley 14 to rotate through the synchronous belt 15. The small synchronous pulley 14 drives the saw blade 4 to rotate at a high speed; the operator holds the plate by hand for cutting operation, and the external dust suction device starts to perform dust suction operation. After the laser distance sensor 17 detects the thickness of the plate, it adjusts the detection distances of the short unilateral safety grating 26 and the long unilateral safety grating 28. The motor 30 drives the double pulley 27 connected to it to rotate. The double pulley 27 drives another double pulley 27 to rotate through the first belt 29, and then drives the last double pulley 27 to rotate through another first belt 29, so as to drive the adjustment knobs of the two long unilateral safety gratings 28 to rotate. At the same time, the double pulley 27 drives the small pulley 32 to rotate through the second belt 31, and then drives the adjustment knob of the short unilateral safety grating 26 to rotate through the large bevel gear 34 and the small bevel gear 33, so as to realize the adjustment of the detection distances of the short unilateral safety grating 26 and the long unilateral safety grating 28. If the short unilateral safety grating 26 or the long unilateral safety grating 28 detects the operator's hand, it means that the operator's hand has entered the cutting area and there is a risk of accidentally touching the saw blade 4. At this time, the electric push rod 18 drives the connecting rod 11 to move towards the side of the arc seat 10, thereby pushing the piston to move. The piston pushes the hydraulic oil in the hydraulic injection cylinder 12 into the chamber 21, and then enters the connecting groove 24. The hydraulic oil pushes the arc piston seat 23 to move. The arc piston seat 23 pushes the brake pad 19 to approach the brake disc 9 until the brake disc 9 is tightly fixed, so that the large synchronous pulley 8 stops rotating, so that the synchronous belt 15, the small synchronous pulley 14 and the saw blade 4 stop rotating, and then the motor 2 stops running; if cutting needs to be carried out again, all components need to be reset and restarted.

[0053] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic braking woodworking machine device, comprising a frame (1), characterized in that: A workbench (7) is fixedly mounted on the top of the frame (1), and a cutting assembly is installed between the inner bottom of the frame (1) and the workbench (7); A hydraulic injection cylinder (12) is fixedly installed on one side of the inner bottom of the frame (1), and a push-pull assembly is installed on the top of the hydraulic injection cylinder (12). The output end of the hydraulic injection cylinder (12) is fixedly connected to an arc seat (10), and the arc seat (10) and the frame (1) are fixedly connected. A chamber (21) is provided inside the arc seat (10), and the chamber (21) and the hydraulic injection cylinder (12) are connected. Arc grooves (25) are provided on the inner walls of both sides of the arc seat (10), and a hydraulic pushing assembly is installed between the two arc grooves (25) and the chamber (21). The movable ends of the two hydraulic pushing assemblies are fixedly equipped with brake pads (19), and a brake disc (9) is provided between the two brake pads (19), and the brake disc (9) is connected to the cutting assembly; A fixing frame (6) is fixedly installed on one side of the top of the workbench (7), and the other end of the fixing frame (6) is fixedly connected to a housing (5), and a short single-sided safety grating (26) is fixedly embedded at the bottom of the housing (5), and two long single-sided safety gratings (28) are symmetrically fixedly connected to the top of the short single-sided safety grating (26), and the long single-sided safety grating (28) is fixedly embedded at the bottom of the housing (5), and a synchronous adjustment component is installed between the short single-sided safety grating (26) and the two long single-sided safety gratings (28); A fixing rod (16) is fixedly connected to one side of the outer surface of the housing (5), and a laser distance measuring sensor (17) is fixedly connected to the bottom of the fixing rod (16); An adjustable backrest is installed on one side of the top of the workbench (7).

2. The automatic braking woodworking machine device according to claim 1, characterized in that: The cutting assembly comprises a motor (2), and the motor (2) is fixedly mounted on the inner bottom of the frame (1); a driving end of the motor (2) is fixedly connected to a large synchronous pulley (8), and the large synchronous pulley (8) is fixedly connected to a brake disc (9); a synchronous belt (15) is meshed on the outer surface of the large synchronous pulley (8); a small synchronous pulley (14) is meshed on one side of the inner surface of the synchronous belt (15); a saw blade (4) is fixedly connected to one end of the small synchronous pulley (14), and the saw blade (4) is arranged to pass through the workbench (7).

3. The automatic braking woodworking machine device according to claim 2, characterized in that: The mounting shaft surface of the small synchronous pulley (14) is fixedly sleeved with a support seat (13), and the support seat (13) is fixedly mounted on the bottom of the workbench (7).

4. The automatic braking woodworking machine device according to claim 1, characterized in that: The push-pull assembly comprises an electric push rod (18), and the electric push rod (18) is fixedly mounted on the top of the hydraulic injection cylinder (12), and a connecting rod (11) is fixedly mounted on the movable end of the electric push rod (18), and the connecting rod (11) is fixedly connected to the piston of the hydraulic injection cylinder (12).

5. The automatic braking woodworking machine device according to claim 1, characterized in that: The two hydraulic push assemblies each include two connecting grooves (24), and the connecting grooves (24) are connected to the adjacent arc-shaped grooves (25) and the chamber (21), and the interior of the connecting grooves (24) is sealed and slidably provided with an arc-shaped piston seat (23), and the arc-shaped piston seat (23) is fixedly connected to the adjacent brake pad (19).

6. The automatic braking woodworking machine device according to claim 5, characterized in that: The inner walls on both sides of the connection groove (24) are fixedly connected with arc-shaped plates (20), and a plurality of springs (22) are fixedly connected between the two arc-shaped plates (20) and the arc-shaped piston seat (23).

7. The automatic braking woodworking machine device according to claim 1, characterized in that: The synchronous adjustment component comprises a motor (30) and three double belt pulleys (27), and the motor (30) is fixedly mounted on an inner wall of one side of the housing (5), and the three double belt pulleys (27) are rotatably connected to the inner wall of the housing (5), the adjustment knobs of the two long single-sided safety gratings (28) are fixedly connected to the adjacent double belt pulleys (27), the driving end of the motor (30) is fixedly connected to the adjacent double belt pulleys (27), and the first belt (27) is commonly sleeved between the two adjacent double belt pulleys (27). 9), a second belt (31) is sleeved on the outer surface of one of the pulleys of the single double pulley (27), a small pulley (32) is abutted on the inner surface of the second belt (31), and the small pulley (32) is rotatably connected to the inner wall of the housing (5), one end of the small pulley (32) is fixedly connected to a large bevel gear (34), one side of the outer surface of the large bevel gear (34) is meshedly connected to a small bevel gear (33), and the small bevel gear (33) is fixedly connected to the adjustment knob of the short single-sided safety grating (26).

8. The automatic braking woodworking machine device according to claim 1, characterized in that: The adjustable backrest comprises two screw rods (35), and the screw rods (35) are fixedly mounted on the top of the workbench (7). The outer surfaces of the two screw rods (35) are slidably sleeved with movable frames (36), and one end of the two movable frames (36) is fixedly connected to the backrest body (3).

9. The automatic braking woodworking machine device according to claim 8, characterized in that: The outer surfaces of the two screw rods (35) are both threadedly sleeved with clamping nuts (37), and the clamping nuts (37) are pressed on the tops of the two movable frames (36).

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