CN216179081U - Timber burnishing and polishing device - Google Patents

Abstract

The utility model discloses a wooden door polishing device which comprises a roller conveyor, wherein the roller conveyor comprises a rack and a roller, a frame polishing mechanism, a first end surface polishing mechanism and a second end surface polishing mechanism are arranged on the rack, the frame polishing mechanism comprises a polished rod, sliding plates, a sliding block, left and right frame polishing brushes, a side polishing driving mechanism, an interval adjusting mechanism and a front and rear frame polishing mechanism, and the interval adjusting mechanism is connected with the two sliding plates and used for adjusting the interval between the two sliding plates. The wooden door polishing device provided by the utility model can adjust the distance between the left frame and the right frame polishing brushes, so that the left frame and the right frame of wooden doors with different widths can be polished; carry out burnishing and polishing to timber terminal surface up end through first terminal surface burnishing and polishing mechanism and second terminal surface burnishing and polishing mechanism, frame around to the timber is polished through frame brush roll of polishing around to the timber, realizes the automatic burnishing and polishing to the timber frame, labour saving and time saving improves production efficiency.

Description

Timber burnishing and polishing device

Technical Field

The utility model relates to the technical field of wooden door processing, in particular to a wooden door grinding and polishing device.

Background

The wooden door is widely applicable to civil and commercial buildings and houses, and can be divided into various types according to materials, processes and purposes. In the production and processing of the wood door, the requirement on the surface smoothness of the appearance is high, so that burrs, bulges and the like generated in the processing of the outer surface of the wood door are polished after the wood door is produced.

Current timber processing polishing grinding device can only carry out the burnishing and polishing operation to the door face and can not polish to the frame of timber, still need carry out in addition the polishing of frame, wastes time and energy.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems and designs a wooden door grinding and polishing device.

The technical scheme of the utility model is that the wooden door polishing device comprises a roller conveyor, wherein the roller conveyor comprises a rack and a plurality of rollers which are arranged on the rack and used for conveying wooden doors, a frame polishing mechanism is arranged on the rack and comprises two polished rods which are fixedly arranged on the rack, a fixed plate and two sliding plates are arranged above the polished rods, the sliding plates are symmetrically distributed along the axis of the roller conveyor, sliding blocks are fixed at the lower ends of the sliding plates, the sliding blocks are slidably sleeved on the polished rods, at least two left and right frame polishing brushes are rotatably arranged on the sliding plates, the left and right frame polishing brushes move at the gap of the rollers, and side polishing driving mechanisms used for driving the left and right frame polishing brushes to rotate are also arranged on the sliding plates; the fixed plate is fixedly arranged on the polished rod and positioned between the two sliding plates, and the fixed plate is provided with an interval adjusting mechanism and a front and rear frame polishing mechanism; the distance adjusting mechanism is connected with the two sliding plates and is used for adjusting the distance between the two sliding plates; front and back frame grinding machanism installs first elevating system including fixing the first support on the fixed plate on the first support, and the crane that stretches over two sliding plates is installed to first elevating system lift end, and frame brush roller of polishing around the crane lower part is installed, and first elevating system drive brush roller of polishing goes up and down in cylinder clearance department, and the drive mechanism of polishing around installing on the crane, the drive mechanism of polishing around with around the frame brush roller transmission is connected.

Furthermore, first elevating system is including electric jar and the uide bushing on the first support of installation, and the slip cartridge has the guide bar in the uide bushing, and electric jar flexible end and guide bar lower extreme all are connected with the crane.

Furthermore, the front and back polishing driving mechanism comprises a first driving motor arranged on the lifting frame, a first driving belt wheel is arranged at the output end of the first driving motor, one end of the front and back frame polishing brush roller extends out of the lifting frame and is provided with a first driven belt wheel, and the first driving belt wheel is in transmission connection with the first driven belt wheel through a first transmission belt.

The side polishing driving mechanism comprises a second support arranged on the sliding plate, a second driving motor is arranged on the second support, a second driving belt wheel is arranged at the output end of the second driving motor, a second driven belt wheel is arranged at the upper end of the left and right frame polishing brush, and the second driving belt wheel is in transmission connection with the second driven belt wheel through a second transmission belt.

Furthermore, the interval adjusting mechanism comprises a third driving motor fixedly mounted on the fixed plate and a screw rod rotatably mounted on the fixed plate, the third driving motor is in transmission connection with the screw rod through a coupler, at least one nut pair is mounted on the screw rod, two connecting rods are hinged to the nut pair and correspond to the sliding plates one to one, and the other ends of the connecting rods are hinged to the sliding plates corresponding to the connecting rods.

Further, install the first terminal surface burnishing and polishing mechanism that is used for the timber terminal surface to polish in the frame, first terminal surface burnishing and polishing mechanism is including installing third support and two polishing brush rollers in the frame, and the polishing brush roller rotates to be installed in the frame inboard and be located the cylinder top, and engaged with gear is all installed to two polishing brush roller one end, and third support mounting is at the frame outer wall, installs fourth driving motor on the third support, and fourth driving motor passes through the shaft coupling and is connected with one of them polishing brush roller transmission.

Further, install the second terminal surface polishing mechanism that is used for the timber terminal surface to polish in the frame, second terminal surface polishing mechanism is including installing the mounting panel in the frame, rotate on the mounting panel and install a plurality of terminal surface polishing brushes, the terminal surface polishing brush is the wave form and arranges, the third driven pulley is installed to the terminal surface polishing brush upper end, be fixed with the fourth support on the mounting panel, install fifth driving motor on the fourth support, the third driving pulley is installed to fifth driving motor output, be connected through the transmission of third driving belt between third driving pulley and the third driven pulley.

Furthermore, a proximity switch for detecting the wooden door is installed at the lower end of the fixing plate.

The utility model has the beneficial effects that: the distance between the left frame and the right frame of the wooden door to be polished can be adjusted through the distance adjusting mechanism according to the width of the wooden door to be polished, so that the distance is matched with the width of the wooden door, and the left frame and the right frame of the wooden door with different widths can be polished conveniently; carry out burnishing and polishing to timber terminal surface up end through first terminal surface burnishing and polishing mechanism and second terminal surface burnishing and polishing mechanism, improve the burnishing and polishing effect, frame around to the timber is polished through frame burnishing and brushing roller around to the timber, realizes the automatic burnishing and polishing to the timber frame, labour saving and time saving improves production efficiency.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is a partial schematic view of the frame sharpening mechanism of FIG. 2;

FIG. 4 is a partial schematic view of the frame sharpening mechanism of FIG. 1;

FIG. 5 is a schematic diagram of the second end face polishing mechanism of FIG. 2;

in the figure, 1, a roller conveyor; 11. a frame; 12. a drum; 2. a frame polishing mechanism; 21. a polish rod; 22. a fixing plate; 23. a slide plate; 24. a slider; 25. polishing and brushing the left and right frames; 26. a side grinding driving mechanism; 261. a second support; 262. a second drive motor; 263. a second drive pulley; 264. a second driven pulley; 265. a second drive belt; 27. a spacing adjustment mechanism; 271. a third drive motor; 272. a screw; 273. a nut pair; 274. a connecting rod; 28. a front and rear frame polishing mechanism; 281. a first support; 282. a lifting frame; 283. polishing the brush rollers on the front and rear frames; 284. an electric cylinder; 285. a first drive motor; 286. a first drive pulley; 287. a first driven pulley; 288. a first drive belt; 3. the first end surface polishing mechanism; 31. a third support; 32. polishing the brush roller; 33. a gear; 34. a fourth drive motor; 4. the second end surface polishing mechanism; 41. mounting a plate; 42. end face polishing brush; 43. a third driven pulley; 44. a fourth support; 45. a fifth drive motor; 46. a third drive pulley; 47. a third drive belt.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

The terms "first" and "second" in the present invention do not denote any particular quantity or order, but rather are used to distinguish one name from another.

In one embodiment, please refer to FIGS. 1-5: a wooden door polishing device comprises a roller conveyor 1, wherein the roller conveyor 1 comprises a rack 11 and a plurality of rollers 12 which are arranged on the rack 11 and used for conveying wooden doors, a frame polishing mechanism 2 is arranged on the rack 11, the frame polishing mechanism 2 comprises two polished rods 21 fixedly arranged on the rack 11, a fixed plate 22 and two sliding plates 23 are arranged above the polished rods 21, the sliding plates 23 are symmetrically distributed along the axis of the roller conveyor 1, sliding blocks 24 are fixed at the lower ends of the sliding plates 23, the sliding blocks 24 are slidably sleeved on the polished rods 21, at least two left and right frame polishing brushes 25 are rotatably arranged on the sliding plates 23, the left and right frame polishing brushes 25 move in the gap between the rollers 12, and side polishing driving mechanisms 26 used for driving the left and right frame polishing brushes 25 to rotate are further arranged on the sliding plates 23; the fixed plate 22 is fixedly arranged on the polish rod 21 and positioned between the two sliding plates 23, and the fixed plate 22 is provided with a spacing adjusting mechanism 27 and a front and rear frame polishing mechanism 28; the distance adjusting mechanism 27 is connected with the two sliding plates 23 and is used for adjusting the distance between the two sliding plates 23; front and back frame grinding mechanism 28 is including fixing first support 281 on fixed plate 22, installs first elevating system on the first support 281, and the crane 282 that stretches over two sliding plates 23 is installed to first elevating system lift end, and frame brush roll 283 is ground around crane 282 lower part is installed, and first elevating system drive brush roll of polishing goes up and down in the 12 clearance departments of cylinder, and the actuating mechanism that polishes around installing on the crane 282, the actuating mechanism that polishes around with around the frame brush roll 283 transmission connection.

In order to drive the lifting frame 282 to lift stably, a first lifting mechanism is arranged and comprises an electric cylinder 284 and a guide sleeve which are arranged on a first support 281, a guide rod is inserted in the guide sleeve in a sliding mode, and the telescopic end of the electric cylinder 284 and the lower end of the guide rod are connected with the lifting frame 282. The electric cylinder 284 drives the lifting frame 282 to lift, and the guide sleeve and the guide rod play a guiding role, so that the lifting frame 282 can lift smoothly.

For the rotation of frame brush roller 283 of polishing around the drive, set up around the drive mechanism of polishing including installing the first driving motor 285 on crane 282, first driving pulley 286 is installed to first driving motor 285 output, and frame brush roller 283 one end of polishing around extends crane 282 and installs first driven pulley 287, and first driving pulley 286 is connected through the transmission of first driving belt 288 with first driven pulley 287 within a definite time. The first driving motor 285 drives the first driven pulley 287 and the front and rear frame polishing brush rollers 283 to rotate through the first transmission belt 288, and the front and rear frame polishing brush rollers 283 polish the front and rear frames of the wooden door.

For the rotation of frame brush polish 25 about the drive, the avris is polished about the timber, and avris drive mechanism 26 is including installing second support 261 on the sliding plate 23, installs second driving motor 262 on the second support 261, and second driving pulley 263 is installed to second driving motor 262 output, and second driven pulley 264 is installed to the frame brush polish 25 upper end about, and second driving pulley 263 is connected through the transmission of second driving belt 265 with second driven pulley 264. The second driving motor 262 drives the second driving belt wheel 263 and the left and right side frame polishing brushes 25 to rotate through the second driving belt wheel 263 and the second transmission belt 265, and the left and right side frame polishing brushes 25 polish the left and right sides of the wooden door.

In order to facilitate the contact between the left and right frame polishing brushes 25 and wooden door frames with different widths, the polishing is performed, a spacing adjusting mechanism 27 is arranged, the spacing adjusting mechanism 27 comprises a third driving motor 271 fixedly mounted on the fixing plate 22 and a screw 272 rotatably mounted on the fixing plate 22, the screw 272 is horizontally arranged and rotatably mounted on the fixing plate 22 through a bearing, the third driving motor 271 is in transmission connection with the screw 272 through a coupler, two nut pairs 273 are mounted on the screw 272, two connecting rods 274 are hinged on the nut pairs 273, the connecting rods 274 are in one-to-one correspondence with the sliding plates 23, and the other ends of the connecting rods 274 are hinged with the sliding plates 23 corresponding to the connecting rods. The third driving motor 271 is a stepping motor, the third driving motor 271 drives the screw 272 to rotate through the coupler, the nut pair 273 converts the rotary motion of the screw 272 into linear motion, and drives the sliding plate 23 to move through the connecting rod 274, under the guiding and supporting effects of the polished rod 21 and the slider 24, the sliding plate 23 slides on the polished rod 21, so that the two sliding plates 23 move oppositely or backwards, the distance between the left frame and the right frame of the wood door is adjusted, the wood door width is convenient to adapt, and the left frame and the right frame of the wood door are polished.

For polishing the end face of the wooden door, a first end face polishing mechanism 3 used for polishing the end face of the wooden door is installed on the rack 11, the first end face polishing mechanism 3 comprises a third support 31 and two polishing brush rollers 32 installed on the rack 11, the polishing brush rollers 32 are rotatably installed on the inner side of the rack 11 and located above the roller 12, gears 33 meshed with each other are installed at one ends of the two polishing brush rollers 32, the third support 31 is installed on the outer wall of the rack 11, a fourth driving motor 34 is installed on the third support 31, and the fourth driving motor 34 is in transmission connection with one of the polishing brush rollers 32 through a coupler.

In order to improve the grinding and polishing effect on the opposite side of the wooden door, a second end face grinding and polishing mechanism 4 for grinding the end face of the wooden door is further arranged on the rack 11, the second end face grinding and polishing mechanism 4 can enhance the grinding and polishing effect, the second end face grinding and polishing mechanism 4 comprises a mounting plate 41 mounted on the rack 11, a plurality of end face grinding brushes 42 are rotatably mounted on the mounting plate 41, the end face grinding brushes 42 are arranged in a wave shape, the end face grinding brushes 42 can be arranged more tightly, the second end face grinding and polishing mechanism 4 is in full contact with the upper end face of the wooden door, and no dead angle is left; the third driven pulley 43 is installed at the upper end of the end face polishing brush 42, a fourth support 44 is fixed on the mounting plate 41, a fifth driving motor 45 is installed on the fourth support 44, a third driving pulley 46 is installed at the output end of the fifth driving motor 45, and the third driving pulley 46 is in transmission connection with the third driven pulley 43 through a third transmission belt 47. The second end face polishing mechanism 4 polishes and polishes the wooden door again, the fifth driving motor 45 drives the third driven pulley 43 and the end face polishing brush 42 to rotate through the third driving pulley 46 and the third driving belt 47, and the end face polishing brush 42 polishes and polishes the upper end face of the wooden door passing through the end face polishing brush, so that the polishing and polishing effect is improved.

In order to obtain the wooden door position conveniently, the front and rear frame polishing brush rollers 283 can polish the front and rear frames of the wooden door when the wooden door passes through and passes through, and a proximity switch for detecting the wooden door is installed at the lower end of the fixing plate 22. The device is provided with a control system which is electrically connected with the roller conveyor 1, the first driving motor 285, the second driving motor 262, the third driving motor 271, the fourth driving motor 34 and the proximity switch to control the work of each electric element and carry out the grinding and polishing operation.

The working principle of the embodiment is as follows: firstly, adjusting the distance between the left frame polishing brush 25 and the right frame polishing brush 25 through the distance adjusting mechanism 27 according to the width of a wooden door to be polished, specifically, starting a third driving motor 271, driving a screw 272 and a nut pair 273 to move by the third driving motor 271, and further driving two sliding plates 23 to move, so that the distance between the left frame polishing brush 25 and the right frame polishing brush 25 is adjusted to be matched with the width of the wooden door, and the left frame and the right frame of the wooden door are polished conveniently;

the wooden door to be polished enters from the input end of the roller conveyor 1, the wooden door is kept at the central position of the roller 12 to move as much as possible, and the roller 12 conveys the wooden door to sequentially pass through the first end face polishing mechanism 3, the frame polishing mechanism 2 and the second end face polishing mechanism 4; the first end face grinding and polishing mechanism 3 is used for grinding the upper end face of the wooden door, specifically, the fourth driving motor 34 drives one of the polishing brush rollers 32 through a coupler and drives the other polishing brush roller 32 to rotate reversely through a gear 33, and the two polishing brush rollers 32 are in contact with the upper end face of the wooden door passing through the polishing brush rollers and are used for grinding the upper end face of the wooden door;

then the wooden door moves to the frame polishing mechanism 2, the second driving motor 262 drives the second driving belt wheel 263 and the left and right frame polishing brushes 25 to rotate through the second driving belt wheel 263 and the second transmission belt 265, and the left and right frame polishing brushes 25 polish the left and right sides of the wooden door;

when the wooden door moves to be close to the front and rear frame polishing brush rollers 283, the proximity switch detects the head end of the wooden door, the system judges that the wooden door moves to the front and rear frame polishing brush rollers 283, then the roller conveyor 1 is powered off and stops working, so that the wooden door keeps the position still, then the telescopic end of the electric cylinder 284 extends out of the driving lifting frame 282 to descend, the first driving motor 285 drives the first driven belt pulley 287 and the front and rear frame polishing brush rollers 283 to rotate through the first transmission belt 288, the front and rear frame polishing brush rollers 283 descend to the gap of the roller 12 to polish the front frame of the wooden door, and after polishing is finished, the telescopic end of the electric cylinder 284 contracts to drive the lifting frame 282 to ascend and reset;

the roller conveyor 1 is electrified to continuously convey the wooden door, then the wooden door passes through the second end face polishing mechanism 4, the second end face polishing mechanism 4 polishes and polishes the wooden door again, the fifth driving motor 45 drives the third driven pulley 43 and the end face polishing brush 42 to rotate through the third driving pulley 46 and the third transmission belt 47, and the end face polishing brush 42 polishes and polishes the upper end face of the wooden door passing through the wooden door, so that the polishing and polishing effect is improved;

when the tail end of the wooden door passes through the proximity switch, the proximity switch detects a signal again, according to the conveying speed of the roller conveyor 1, the system program calculates the time t when the wooden door moves to the right side of the front and rear frame polishing brush rollers 283, and when the time t is reached, the system judges that the tail end of the wooden door is in a position where the wooden door can be polished by the front and rear frame polishing brush rollers 283; then the roller conveyor 1 is powered off again to suspend the operation, so that the wooden door keeps the position still, then the telescopic end of the electric cylinder 284 extends out of the driving lifting frame 282 to descend, the first driving motor 285 drives the first driven pulley 287 and the front and rear frame polishing brush rollers 283 to rotate through the first transmission belt 288, the front and rear frame polishing brush rollers 283 descend to the gap of the roller 12 to polish the front frame of the wooden door, and after the polishing is finished, the telescopic end of the electric cylinder 284 retracts to drive the lifting frame 282 to ascend and reset;

and then the roller conveyor 1 is electrified to continuously convey the wooden doors, and finally the wooden doors are moved to the blanking end of the roller conveyor 1 through the frame polishing mechanism 2 and the second end surface polishing mechanism 4.

The technical solutions described above only represent the preferred technical solutions of the present invention, and some possible modifications to some parts of the technical solutions by those skilled in the art all represent the principles of the present invention, and fall within the protection scope of the present invention.

Claims (8)

1. A wooden door polishing device comprises a roller conveyor (1), wherein the roller conveyor (1) comprises a rack (11) and a plurality of rollers (12) which are arranged on the rack (11) and used for conveying wooden doors, and is characterized in that a frame polishing mechanism (2) is arranged on the rack (11), the frame polishing mechanism (2) comprises two polished rods (21) fixedly arranged on the rack (11), a fixed plate (22) and two sliding plates (23) are arranged above the polished rods (21), the sliding plates (23) are symmetrically distributed along the axis of the roller conveyor (1), the lower ends of the sliding plates (23) are fixed with sliders (24), the sliders (24) are slidably sleeved on the polished rods (21), at least two left and right frame polishing brushes (25) are rotatably arranged on the sliding plates (23), and the left and right frame polishing brushes (25) move at the gap of the rollers (12), the sliding plate (23) is also provided with a side grinding driving mechanism (26) for driving the left and right frame grinding brushes (25) to rotate; the fixed plate (22) is fixedly arranged on the polish rod (21) and positioned between the two sliding plates (23), and the fixed plate (22) is provided with a spacing adjusting mechanism (27) and a front and rear frame polishing mechanism (28); the distance adjusting mechanism (27) is connected with the two sliding plates (23) and is used for adjusting the distance between the two sliding plates (23); front and back frame grinding machanism (28) are including fixing first support (281) on fixed plate (22), install first elevating system on first support (281), crane (282) of two slide plates (23) are installed to first elevating system lift end, frame grinding brush roller (283) around crane (282) lower part is installed, first elevating system drive grinding brush roller is gone up and down in cylinder (12) clearance department, grinding actuating mechanism around installing on crane (282), grinding actuating mechanism is connected with frame grinding brush roller (283) transmission around with around with.

2. The wooden door grinding and polishing device as claimed in claim 1, wherein the first lifting mechanism comprises an electric cylinder (284) and a guide sleeve which are arranged on the first support (281), a guide rod is inserted in the guide sleeve in a sliding manner, and the telescopic end of the electric cylinder (284) and the lower end of the guide rod are connected with the lifting frame (282).

3. The wooden door polishing device according to claim 1, wherein the front and rear polishing driving mechanism comprises a first driving motor (285) installed on the lifting frame (282), a first driving pulley (286) is installed at the output end of the first driving motor (285), one end of the front and rear frame polishing brush roller (283) extends out of the lifting frame (282) and is installed with a first driven pulley (287), and the first driving pulley (286) is in transmission connection with the first driven pulley (287) through a first transmission belt (288).

4. The wooden door grinding and polishing device according to claim 1, wherein the side grinding driving mechanism (26) comprises a second support (261) installed on the sliding plate (23), a second driving motor (262) is installed on the second support (261), a second driving pulley (263) is installed at the output end of the second driving motor (262), a second driven pulley (264) is installed at the upper end of the left and right side frame grinding brush (25), and the second driving pulley (263) is in transmission connection with the second driven pulley (264) through a second transmission belt (265).

5. The wooden door grinding and polishing device according to claim 1, characterized in that the spacing adjusting mechanism (27) comprises a third driving motor (271) fixedly mounted on the fixing plate (22) and a screw (272) rotatably mounted on the fixing plate (22), the third driving motor (271) is in transmission connection with the screw (272) through a coupler, at least one nut pair (273) is mounted on the screw (272), two connecting rods (274) are hinged on the nut pair (273), the connecting rods (274) correspond to the sliding plates (23) one by one, and the other ends of the connecting rods (274) are hinged with the corresponding sliding plates (23).

6. The wooden door grinding and polishing device according to claim 1, characterized in that a first end face grinding and polishing mechanism (3) for grinding the end face of the wooden door is installed on the rack (11), the first end face grinding and polishing mechanism (3) comprises a third support (31) and two polishing brush rollers (32) which are installed on the rack (11), the polishing brush rollers (32) are rotatably installed on the inner side of the rack (11) and located above the roller (12), a meshed gear (33) is installed at one end of each of the two polishing brush rollers (32), the third support (31) is installed on the outer wall of the rack (11), a fourth driving motor (34) is installed on the third support (31), and the fourth driving motor (34) is in transmission connection with one of the polishing brush rollers (32) through a coupler.

7. The wooden door polishing device according to claim 6, wherein a second end face polishing mechanism (4) for polishing the end face of the wooden door is mounted on the rack (11), the second end face polishing mechanism (4) comprises a mounting plate (41) mounted on the rack (11), a plurality of end face polishing brushes (42) are rotatably mounted on the mounting plate (41), the end face polishing brushes (42) are arranged in a wave shape, a third driven pulley (43) is mounted at the upper end of each end face polishing brush (42), a fourth support (44) is fixed on the mounting plate (41), a fifth driving motor (45) is mounted on each fourth support (44), a third driving pulley (46) is mounted at the output end of the fifth driving motor (45), and the third driving pulley (46) is in transmission connection with the third driven pulley (43) through a third transmission belt (47).

8. The wooden door grinding and polishing device as claimed in any one of claims 1 to 7, wherein a proximity switch for detecting the wooden door is mounted at the lower end of the fixing plate (22).

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