A cake baking apparatus

Abstract

The application discloses a kind of pastry baking device, including baking frame, multiple horizontal lifting plates are slidably connected on baking frame, multiple vertical and through supporting barrels are installed on each lifting plate, each lifting plate is corresponding with each other on supporting barrel, the top end and bottom end of each supporting barrel are horizontally flush respectively, distance adjusting mechanism is installed between each lifting plate and baking frame, and multiple horizontal rear support plates are slidably connected on baking frame.The application can reciprocatingly smear grease on the inner wall of each supporting barrel by roller brush and lifting mechanism, so that the grease coverage of the inner wall of supporting barrel is more uniform, and the excess grease is discharged, which is not easy to gather in large area.The roller brush can smear grease on the top end of rear support plate, so that the grease coverage of the top end of rear support plate is more uniform, and it is not easy to gather in large area, which can reduce the problem of poor taste of food caused by uneven distribution of grease.

Description

Technical Field

[0001] This invention relates to the field of food processing technology, and more particularly to a pastry baking apparatus. Background Technology

[0002] There are many food processing techniques, among which baking is a common one. To make semi-finished food products more uniform after baking and easier to transport and sell (such as bread), they are usually placed in a container or mold for baking. To prevent burning and excessive sticking during baking, grease is usually sprayed on the surface of the container or mold that comes into contact with the semi-finished food. However, existing baking equipment is prone to uneven grease coverage when spraying grease onto the container or mold. Furthermore, under the influence of gravity, grease tends to accumulate at the bottom of the vertical sidewalls and is not easily drained, still resulting in uneven grease coverage. This affects the taste of the food and is not conducive to sales, highlighting the shortcomings of existing technology. Summary of the Invention

[0003] The purpose of this invention is to provide a pastry baking apparatus to solve the technical problem of uneven oil coverage caused by the accumulation of oil in the baking container and its difficulty in drainage.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A pastry baking apparatus includes a baking rack with multiple horizontal lifting plates slidably connected vertically. Each lifting plate has multiple vertically extending support cylinders installed vertically through it. The support cylinders of each lifting plate are vertically aligned, and their top and bottom ends are horizontally aligned. Each lifting plate and the baking rack share an adjustment mechanism. The baking rack also has multiple horizontal rear support plates slidably connected front-to-back, and multiple horizontally extending brush rollers are installed at its front. Each rear support plate shares a vertically fixed front support plate at its front, and when slid backward to a certain position, the support cylinders are able to... The bottom end is in contact with the top of one of the rear support plates. The top of the rear support plate that is in contact with the bottom end of the support cylinder is always in contact with the bristles of the brush roller. A lifting mechanism is installed on the upper part of the baking rack. The lifting mechanism is equipped with multiple vertical roller brushes. Each roller brush corresponds vertically to the support cylinder where the lifting plate is located. The bristles of the roller brush can fully contact the inner wall of the support cylinder. An electric heating wire is embedded and fixed around the perimeter of the support cylinder. An electric heating wire is also embedded and fixed flat inside the rear support plate. The baking rack is also fixed with a controller. The electric heating wire is electrically connected to the controller. The controller is connected to an external power source.

[0006] Based on the above technical solution, the adjusting mechanism includes two shear-type telescopic frames and two servo motors. The two shear-type telescopic frames are arranged on the left and right sides of the baking rack, and the two servo motors are fixed on the left and right sides of the baking rack, respectively. Each shear-type telescopic frame includes multiple inner connecting plates and outer connecting plates. The middle parts of the inner connecting plates and the middle parts of the outer connecting plates are hinged to each other through a main hinge seat. Each inner connecting plate and each outer connecting plate are alternately hinged from top to bottom through a secondary hinge seat. The main hinge seat at the uppermost position of the shear-type telescopic frame is located on the left and right sides. A transmission block is fixed, and each of the secondary hinge seats has a slider fixed in the left-right direction. The sliders of the front and rear parts of the shear-type telescopic frame correspond to each other in the front-back direction. The sliders that correspond to each other in the front-back direction form a group. The uppermost group of sliders of the shear-type telescopic frame is slidably connected to the upper part of the baking rack. The remaining groups of sliders of the shear-type telescopic frame are slidably connected to each lifting plate in the front-back direction. The two No. 1 servo motors are electrically connected to the controller. The rotating shafts of the two No. 1 servo motors are threadedly connected to the two transmission blocks in the upper and lower directions, respectively.

[0007] Based on the above technical solution, the lifting mechanism includes a guide frame, a sliding plate, and a second servo motor. A vertical guide frame is fixed at the top of the baking rack, and a horizontal sliding plate is slidably connected to the guide frame. The roller brush includes a support tube and an oil drain hole. The support tube is vertical and closed at the bottom, with a disc-shaped bristle fixed coaxially at the bottom. Multiple horizontal oil drain holes penetrate the bottom of the support tube, each located below the disc-shaped bristle. The support tube is rotatably connected to the sliding plate. A vertical second servo motor is fixed at the bottom of the sliding plate, and the shaft of the second servo motor passes through the sliding plate. A drive gear is coaxially fixed to the shaft of the second servo motor. Each support tube is coaxially fixed with a driven gear, and each drive gear meshes with its respective driven gear. The shaft of the second servo motor is threadedly connected to the baking rack, and the upper part of each support tube is connected to an external oil supply system.

[0008] Based on the above technical solution, a horizontal oil collection trough is fixed at the bottom of the baking rack. The oil collection trough is concave in the middle and high around the edges. An oil drain trough that slopes outward and downward runs through the right side of the oil collection trough.

[0009] Based on the above technical solution, the number of rear support plates is one more than the number of lifting plates. The top of the rear support plate at the top of the front support plate is fixed with an upper rack. When the rear support plates of the remaining parts of the front support plate slide backward, their tops can be flush with the bottom of the support cylinder. The top of the baking rack is fixed with a No. 3 servo motor. The shaft of the No. 3 servo motor is coaxially fixed with a No. 3 gear. The No. 3 gear meshes with the upper rack. The No. 3 servo motor is electrically connected to the controller.

[0010] Based on the above technical solution, the front of the baking rack is fixed with multiple sets of support seats in the same number as the lifting plate from top to bottom. Two support seats on the left and right sides are a set. The two support seats in each set are fixed on the left and right sides of the baking rack respectively. Each brush roller is rotatably connected to each set of support seats. A horizontal No. 4 servo motor is fixed in the left and right direction at the bottom of the baking rack. The shaft of the No. 4 servo motor is connected to one of its brush rollers through belt drive. Each brush roller is connected to the other from top to bottom through belt drive.

[0011] Based on the above technical solution, the front of the baking rack is fixed with the same number of horizontal oil spray pipes as the lifting plate, each oil spray pipe has an oil spray hole, each oil spray pipe is located above and behind each brush roller, and each oil spray pipe is connected to an external oil supply system.

[0012] Based on the above technical solution, the brush roller includes a secondary support shaft and a main support shaft. Each support seat is rotatably connected to a horizontal secondary support shaft in the left-right direction. The secondary support shafts rotatably connected to each group of support seats constitute a group. Each group of secondary support shafts is coaxially connected to the main support shaft through a connector. The connector can be disengaged from the main support shaft. A roller-shaped brush bristle is coaxially fixed in the middle of the main support shaft.

[0013] Based on the above technical solution, the connecting component includes a connecting cylinder and a tightening bolt. The main support shaft and the secondary support shaft are both virtual hexagonal prisms with the same inscribed circle diameter. The connecting cylinder is a hexagonal cylindrical shape that matches the main support shaft and the secondary support shaft. The connecting cylinder is slidably connected to the main support shaft and the secondary support shaft. The connecting cylinder is radially threaded with a tightening bolt. The tightening bolt can be tightened against the outer wall of the main support shaft or the secondary support shaft. When the connecting cylinder is pushed by an external force to a certain position, it can be slidably connected only to the main support shaft or the secondary support shaft.

[0014] Based on the above technical solution, the connecting component includes a connecting cylinder, a support ring, and a compression spring. The main support shaft and the secondary support shaft are both virtual hexagonal prisms with the same inscribed circle diameter. The support cylinder is a hexagonal cylindrical shape that matches the main support shaft and the secondary support shaft. The connecting cylinder is slidably connected to the main support shaft and the secondary support shaft. Each secondary support shaft is coaxially fixed with a support ring, and each support ring is axially fixed with a helical compression spring. The compression spring is interlocked with the secondary support shaft with a gap. The end of the compression spring is fixed to the connecting cylinder. When the connecting cylinder is pushed by an external force and moves towards the secondary support shaft, it can disengage from the sliding connection with the main support shaft when it reaches a certain position. Under the elastic repulsive force of the compression spring, the connecting cylinder has a tendency to slide along the secondary support shaft while simultaneously sliding with both the secondary support shaft and the main support shaft.

[0015] Compared with the prior art, the present invention has the following advantages: The present invention utilizes a roller brush and a lifting mechanism to repeatedly apply grease to the inner wall of each support cylinder, thereby making the grease coverage on the inner wall of the support cylinder more uniform and allowing excess grease to fall and be discharged, preventing large-area accumulation. The brush roller can also apply grease to the top of the rear support plate, thereby making the grease coverage on the top of the rear support plate more uniform and preventing large-area accumulation. This reduces the problem of poor food taste caused by uneven grease distribution, which is beneficial to sales. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the isometric structure of the present invention.

[0017] Figure 2 This is an isometric structural diagram of the shear-type telescopic frame and oil collection tank of the present invention.

[0018] Figure 3 This is a schematic diagram of the main structure of the roller brush of the present invention.

[0019] Figure 4 This is a schematic diagram showing the fit between the brush roller and the support base of the present invention.

[0020] Figure 5 This is a partially enlarged structural diagram of point A in the present invention.

[0021] Figure 6 This is a schematic diagram showing the fit between the connecting cylinder and the tightening bolt of the present invention.

[0022] In the diagram: 1. Baking rack, 2. Lifting plate, 3. Support cylinder, 4. Adjustment mechanism, 5. Rear support plate, 6. Front support plate, 7. Brush roller, 8. Lifting mechanism, 9. Roller brush, 10. Electric heating wire, 11. Controller, 12. Shear-type telescopic frame, 13. Servo motor No. 1, 14. Inner connecting plate, 15. Outer connecting plate, 16. Main hinge seat, 161. Secondary hinge seat, 17. Transmission block, 18. Slider, 19. Guide frame, 20. Sliding plate, 21. Second Servo motor No. 1, 22, support tube, 23, oil drain hole, 24, drive gear, 25, driven gear, 26, oil collection groove, 27, oil drain groove, 28, upper rack, 29, servo motor No. 3, 30, gear No. 3, 31, support base, 32, servo motor No. 4, 33, oil injection pipe, 34, oil injection hole, 35, secondary support shaft, 36, connector, 37, main support shaft, 38, connecting cylinder, 39, tightening bolt, 40, support ring, 41, compression spring. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figures 1-6As shown, a pastry baking apparatus includes a baking rack 1. Multiple horizontal lifting plates 2 are slidably connected to the baking rack 1. Multiple vertically extending support cylinders 3 are installed vertically through each lifting plate 2. The support cylinders 3 containing each lifting plate 2 are vertically aligned, and their top and bottom ends are horizontally aligned. An adjustment mechanism 4 is installed between each lifting plate 2 and the baking rack 1. Multiple horizontal rear support plates 5 are slidably connected to the baking rack 1, and multiple horizontally extending brush rollers 7 are installed at the front. A vertical front support plate 6 is fixed to the front of each rear support plate 5, and when slid backward to a certain position, the bottom end of each support cylinder 3 is able to abut against the top end of one of the rear support plates 5. The top of the rear support plate 5, which is able to fit against the bottom of the support cylinder 3, is always in contact with the bristles of the brush roller 7. A lifting mechanism 8 is installed on the upper part of the baking rack 1. The lifting mechanism 8 is equipped with multiple vertical roller brushes 9. Each roller brush 9 corresponds vertically to the support cylinder 3 where the lifting plate 2 is located. The bristles of the roller brush 9 can fully fit and contact the inner wall of the support cylinder 3. An electric heating wire 10 is embedded and fixed along the circumference of the support cylinder 3. An electric heating wire 10 is also laid flat and embedded and fixed in the rear support plate 5. The baking rack 1 is also fixed with a controller 11. The electric heating wire 10 is electrically connected to the controller 11. The controller 11 is connected to an external power supply. The controller 11 is based on existing technology, such as a microcontroller, PLC, or industrial control computer.

[0025] In use, the distance between each lifting plate 2 is adjusted by the adjusting mechanism 4 to first make each support cylinder 3 fit together vertically. Then, grease is sprayed onto the roller brush 9 manually. Subsequently, the roller brush 9 is moved up and down by the lifting mechanism 8 to fully wet the inner wall of the support cylinder 3. After wetting, the roller brush 9 is lifted to separate it from the inner wall of the support cylinder 3, allowing excess grease to fall and be discharged under gravity. Then, the vertical distance between each support cylinder 3 is increased by the adjusting mechanism 4, and grease is sprayed onto the brush roller 7. Then, each rear support plate 5 is pushed backward manually so that the bottom of each support cylinder 3 is flush with the top of the rear support plate 5, and grease is applied to the top of the rear support plate 5 which is flush with the bottom of the support cylinder 3. Then, semi-finished food (such as dough) can be manually put into the support cylinder 3, and the electric heating wire 10 is energized to heat it, thus realizing the baking process. After baking, the heating wire 10 is stopped, and the rear support plate 5 is moved forward to demold the food.

[0026] The adjusting mechanism 4 includes two shear-type telescopic frames 12 and two servo motors 13. The two shear-type telescopic frames 12 are positioned on the left and right sides of the baking rack 1, and the two servo motors 13 are fixed to the left and right sides of the baking rack 1, respectively. Each shear-type telescopic frame 12 includes multiple inner connecting plates 14 and outer connecting plates 15. The middle parts of the inner connecting plates 14 and the middle parts of the outer connecting plates 15 are hinged to each other through a main hinge seat 16. Each inner connecting plate 14 and each outer connecting plate 15 are alternately hinged from top to bottom through a secondary hinge seat 161. The main hinge seat 16 at the uppermost position of the shear-type telescopic frame 12 is fixed with transmission motors on the left and right sides. The moving block 17 and each of the secondary hinge seats 161 are respectively fixed with sliders 18 in the left and right directions. The sliders 18 of the front and rear parts of the shearing telescopic frame 12 are paired with each other in the front and rear directions. The sliders 18 that are paired with each other in the front and rear directions form a group. The uppermost group of sliders 18 of the shearing telescopic frame 12 is slidably connected to the upper part of the baking rack 1 in the front and back directions. The remaining groups of sliders 18 of the shearing telescopic frame 12 are slidably connected to each lifting plate 2 in the front and back directions. The two first servo motors 13 are electrically connected to the controller 11. The rotating shafts of the two first servo motors 13 are threadedly connected to the two transmission blocks 17 in the upper and lower directions respectively.

[0027] By controlling the two No. 1 servo motors 13 to rotate in both directions, the transmission block 17 can move up and down, thereby enabling the two shear telescopic frames 12 to extend and retract synchronously. This increases the distance between each lifting plate 2, making it easier for the rear support plate 5 to slide backward and fit flush with the bottom of each support cylinder 3.

[0028] The lifting mechanism 8 includes a guide frame 19, a sliding plate 20, and a second servo motor 21. A vertical guide frame 19 is fixed to the top of the baking rack 1. The guide frame 19 is slidably connected to the horizontal sliding plate 20. The roller brush 9 includes a support tube 22 and oil drain holes 23. The support tube 22 is vertical and closed at the bottom, with disc-shaped bristles coaxially fixed thereon. Multiple horizontal oil drain holes 23 penetrate the bottom of the support tube 22, each located below the disc-shaped bristles. The tube 22 is rotatably connected to the sliding plate 20. A vertical second servo motor 21 is fixed at the bottom of the sliding plate 20. The shaft of the second servo motor 21 passes through the sliding plate 20. The shaft of the second servo motor 21 is coaxially fixed with a drive gear 24. Each of the support tubes 22 is coaxially fixed with a driven gear 25. Each drive gear 24 meshes with each driven gear 25. The shaft of the second servo motor 21 is threadedly connected to the baking rack 1. The upper part of each support tube 22 is connected to the external oil supply system.

[0029] Furthermore, the controller 11 controls the second servo motor 21 to rotate in both directions, which enables the sliding plate 20 to slide up and down along the guide frame 19. During this process, the drive gear 24 and driven gear 25 can also drive the support tubes 22 to rotate back and forth, so that the disc-shaped bristles move up and down and circumferentially to contact the inner wall of the support cylinder 3. At the same time, grease can be injected into the support tubes 22 through the external oil supply system, and then discharged from the oil drain hole 23 under the action of centrifugal force and gravity. The grease is then applied to the inner wall of the support cylinder 3 by the disc-shaped bristles. Compared with manually spraying grease onto the roller brush 9, this method is more convenient and faster, and the grease covers the inner wall of the support cylinder 3 more evenly.

[0030] The bottom of the baking rack 1 is fixed with a horizontal oil collection trough 26. The oil collection trough 26 is concave in the middle and high around the edges. The right side of the oil collection trough 26 is also connected by an outward and downward inclined oil draining trough 27.

[0031] Furthermore, the oil collection tank 26 can collect the grease dripping from the support cylinder 3 and discharge it through the oil discharge tank 27, thus facilitating recycling.

[0032] The number of rear support plates 5 is one more than the number of lifting plates 2. The top of the uppermost rear support plate 5 of the front support plate 6 is fixed with an upper rack 28. When the other rear support plates 5 of the front support plate 6 slide backward, their tops can be flush with the bottom of the support cylinder 3. The top of the baking rack 1 is fixed with a No. 3 servo motor 29. The shaft of the No. 3 servo motor 29 is coaxially fixed with a No. 3 gear 30. The No. 3 gear 30 meshes with the upper rack 28. The No. 3 servo motor 29 is electrically connected to the controller 11.

[0033] The controller 11 controls the No. 3 servo motor 29 to rotate in both directions, thereby using the meshing of the No. 3 gear 30 and the upper rack 28 to move the rear support plate 5 and the front support plate 6 back and forth, which is more labor-saving than manual pushing.

[0034] The baking rack 1 has multiple sets of support seats 31 fixed from top to bottom, the same number as the lifting plate 2. Two support seats 31 that correspond to each other on the left and right are a group. The two support seats 31 in each group are fixed on the left and right sides of the baking rack 1 respectively. Each brush roller 7 is rotatably connected to each group of support seats 31. A horizontal No. 4 servo motor 32 is fixed in the left and right direction at the bottom of the baking rack 1. The rotating shaft of the No. 4 servo motor 32 is connected to one of the brush rollers 7 through belt drive. Each brush roller 7 is connected to the other from top to bottom through belt drive.

[0035] When the rear support plate 5 slides backward, the fourth servo motor 32 is controlled to rotate clockwise (viewed from the right), which drives each brush roller 7 to rotate clockwise. This allows the grease on the surface of the brush rollers to be more evenly applied to the top of the rear support plate 5, preventing the grease from accumulating in one place and affecting the quality of the baked goods.

[0036] The baking rack 1 has a number of horizontal oil spray pipes 33 fixed at the front, the same number as the lifting plate 2. Each oil spray pipe 33 has an oil spray hole 34 through it. Each oil spray pipe 33 is located above and behind each brush roller 7. Each oil spray pipe 33 is connected to an external oil supply system.

[0037] The brush roller 7 includes a secondary support shaft 35 and a main support shaft 37. Each support base 31 is rotatably connected to a horizontal secondary support shaft 35 in the left-right direction. Each group of secondary support shafts 35 rotatably connected to the support base 31 constitutes a group. Each group of secondary support shafts 35 is coaxially connected to the main support shaft 37 through a connector 36. The connector 36 can be disengaged from the main support shaft 37. A roller-shaped brush bristle is coaxially fixed in the middle of the main support shaft 37.

[0038] By setting the connector 36, the main support shaft 37 can be easily disengaged from the secondary support shaft 35, thereby facilitating the cleaning or replacement of the main support shaft 37 and the roller-shaped bristles.

[0039] As a component of a connector 36, the connector 36 includes a connecting cylinder 38 and a tightening bolt 39. The main support shaft 37 and the secondary support shaft 35 are both virtual hexagonal prisms with the same inscribed circle diameter. The connecting cylinder 38 is a hexagonal cylindrical shape that matches the main support shaft 37 and the secondary support shaft 35. The connecting cylinder 38 is slidably connected to the main support shaft 37 and the secondary support shaft 35. The connecting cylinder 38 is radially threaded with the tightening bolt 39. The tightening bolt 39 can be tightened against the outer wall of the main support shaft 37 or the secondary support shaft 35. When the connecting cylinder 38 is pushed by an external force to a certain position, it can be slidably connected only to the main support shaft 37 or the secondary support shaft 35.

[0040] Furthermore, the connecting cylinder 38 is slidably connected to the main support shaft 37 and the secondary support shaft 35, and is tightened against the outer wall of the secondary support shaft 35 by the tightening bolt 39. This state can be maintained to ensure the synchronous rotation of the brush roller 7. When it is necessary to clean or replace the main support shaft 37 and the roller-shaped bristles, the tightening bolt 39 is released from the secondary support shaft 35, and the connecting cylinder 38 slides away from the sliding of the main support shaft 37.

[0041] As another component of the connector 36, the connector 36 includes a connecting cylinder 38, a support ring 40, and a compression spring 41. The main support shaft 37 and the secondary support shaft 35 are both virtual hexagonal prisms with the same inscribed circle diameter. The support cylinder 38 is a hexagonal cylindrical shape that matches the main support shaft 37 and the secondary support shaft 35. The connecting cylinder 38 is slidably connected to the main support shaft 37 and the secondary support shaft 35. Each of the secondary support shafts 35 is coaxially fixed with a support ring 40. Each of the support rings 40 is axially fixed with a spiral compression spring 41. The compression spring 41 is interlocked with the secondary support shaft 35. The end of the compression spring 41 is fixed to the connecting cylinder 38. When the connecting cylinder 38 is pushed by an external force and moves toward the secondary support shaft 35, it can disengage from the sliding connection with the main support shaft 37 when it moves to a certain position. Under the elastic repulsive force of the compression spring 41, the connecting cylinder 38 has a tendency to slide along the secondary support shaft 35 while simultaneously sliding with both the secondary support shaft 35 and the main support shaft 37.

[0042] Furthermore, the compression spring 41 allows the connecting cylinder 38 to slide in connection with the main support shaft 37 and the secondary support shaft 35, maintaining this state and ensuring the synchronous rotation of the brush roller 7. When it is necessary to clean or replace the main support shaft 37 and the roller-shaped bristles, the connecting cylinder 38 slides towards the secondary support shaft 35, compressing the compression spring 41, thus disengaging from the sliding connection with the main support shaft 37.

[0043] The above description represents a preferred embodiment of the present invention. For those skilled in the art, any changes, modifications, substitutions, and variations made to the implementation methods without departing from the principles and spirit of the present invention, based on the teachings of the present invention, still fall within the protection scope of the present invention.

Claims

1. A pastry baking apparatus, comprising a baking rack (1), wherein the baking rack (1) is slidably connected with a plurality of horizontal lifting plates (2), characterized in that: Each of the lifting plates (2) has multiple vertical and through support cylinders (3) installed vertically and horizontally. The support cylinders (3) where each of the lifting plates (2) is located are vertically and vertically aligned. The top and bottom ends of each support cylinder (3) are horizontally aligned. Each of the lifting plates (2) and the baking rack (1) are connected by an adjustment mechanism (4). The baking rack (1) is slidably connected to multiple horizontal rear support plates (5) and has multiple horizontal brush rollers (7) installed at the front. Each of the rear support plates (5) has a vertical front support plate (6) fixed at the front. When the rear support plates (5) slide to a certain position, the bottom end of each support cylinder (3) can be in contact with the top end of one of the rear support plates (5). The top of the back support plate (5) that fits together is always in contact with the bristles of the brush roller (7). The baking rack (1) is equipped with a lifting mechanism (8), which is equipped with multiple vertical roller brushes (9). Each roller brush (9) corresponds to the support cylinder (3) where the lifting plate (2) is located. The bristles of the roller brush (9) can fully fit and contact the inner wall of the support cylinder (3). An electric heating wire (10) is embedded and fixed in the circumference of the support cylinder (3). An electric heating wire (10) is also laid flat and embedded in the back support plate (5). The baking rack (1) is also fixed with a controller (11). The electric heating wire (10) is electrically connected to the controller (11). The controller (11) is connected to an external power source.

2. The pastry baking apparatus according to claim 1, characterized in that: The adjusting mechanism (4) includes two shear-type telescopic frames (12) and two servo motors (13). The two shear-type telescopic frames (12) are arranged on the left and right sides of the baking rack (1), and the two servo motors (13) are fixed on the left and right sides of the baking rack (1). The shear-type telescopic frame (12) includes multiple inner connecting plates (14) and outer connecting plates (15). The middle of the inner connecting plate (14) and the middle of the outer connecting plate (15) are hinged to each other through a main hinge seat (16). Each inner connecting plate (14) and each outer connecting plate (15) are alternately hinged from top to bottom through a secondary hinge seat (161). The main hinge seat (16) at the uppermost position of the shear-type telescopic frame (12) is fixed on the left and right sides. There is a transmission block (17), and each of the secondary hinge seats (161) has a slider (18) fixed in the left and right directions. The sliders (18) of the front and rear parts of the shear telescopic frame (12) correspond to each other in the front and rear directions. The sliders (18) that correspond to each other in the front and rear directions form a group. The uppermost group of sliders (18) of the shear telescopic frame (12) is slidably connected to the upper part of the baking rack (1). The remaining groups of sliders (18) of the shear telescopic frame (12) are slidably connected to each lifting plate (2) in the front and rear directions. The two first servo motors (13) are electrically connected to the controller (11). The rotating shafts of the two first servo motors (13) are threadedly connected to the two transmission blocks (17) in the upper and lower directions respectively.

3. The pastry baking apparatus according to claim 1, characterized in that: The lifting mechanism (8) includes a guide frame (19), a sliding plate (20), and a second servo motor (21). The top of the baking rack (1) is fixed with a vertical guide frame (19). The guide frame (19) is slidably connected to a horizontal sliding plate (20). The roller brush (9) includes a support tube (22) and an oil drain hole (23). The support tube (22) is vertical and closed at the bottom. A disc-shaped brush bristle is coaxially fixed at the bottom. Multiple horizontal oil drain holes (23) penetrate the bottom of the support tube (22). Each oil drain hole (23) is located below the disc-shaped brush bristle. The support tube (22) is rotatably connected to the sliding plate (20). A vertical second servo motor (21) is fixed at the bottom of the sliding plate (20). The shaft of the second servo motor (21) passes through the sliding plate (20). The shaft of the second servo motor (21) is coaxially fixed with a drive gear (24). Each support tube (22) is coaxially fixed with a driven gear (25). Each drive gear (24) meshes with each driven gear (25). The shaft of the second servo motor (21) is threadedly connected to the baking rack (1). The upper part of each support tube (22) is connected to the external oil supply system.

4. A pastry baking apparatus according to any one of claims 1-3, characterized in that: The bottom of the baking rack (1) is fixed with a horizontal oil collection trough (26). The oil collection trough (26) is concave in the middle and high around the edges. The right side of the oil collection trough (26) is also connected by an oil drain trough (27) that slopes outward and downward.

5. A pastry baking apparatus according to any one of claims 1-3, characterized in that: The number of rear support plates (5) is one more than the number of lifting plates (2). The top of the rear support plate (5) at the top of the front support plate (6) is fixed with an upper rack (28). When the rear support plates (5) of the other parts of the front support plate (6) slide backward, their tops can be flush with the bottom of the support cylinder (3). The top of the baking rack (1) is fixed with a No. 3 servo motor (29). The shaft of the No. 3 servo motor (29) is coaxially fixed with a No. 3 gear (30). The No. 3 gear (30) meshes with the upper rack (28). The No. 3 servo motor (29) is electrically connected to the controller (11).

6. The pastry baking apparatus according to claim 5, characterized in that: The baking rack (1) has multiple sets of support seats (31) fixed from top to bottom at the front, with the same number as the lifting plate (2). Two support seats (31) that correspond to each other on the left and right are a group. The two support seats (31) in each group are fixed on the left and right sides of the baking rack (1). Each brush roller (7) is rotatably connected to each set of support seats (31). A horizontal No. 4 servo motor (32) is fixed in the left and right direction at the bottom of the baking rack (1). The shaft of the No. 4 servo motor (32) is connected to one of its brush rollers (7) by belt drive. Each brush roller (7) is connected to the other from top to bottom by belt drive.

7. A pastry baking apparatus according to claim 6, characterized in that: The baking rack (1) has a number of horizontal oil spray pipes (33) fixed at the front, the same number as the lifting plate (2). Each oil spray pipe (33) has an oil spray hole (34) through it. Each oil spray pipe (33) is located above and behind each brush roller (7). Each oil spray pipe (33) is connected to the external oil supply system.

8. A pastry baking apparatus according to claim 6, characterized in that: The brush roller (7) includes a secondary support shaft (35) and a main support shaft (37). Each support seat (31) is rotatably connected to a horizontal secondary support shaft (35) in the left and right directions. Each set of secondary support shafts (35) rotatably connected to each set of support seats (31) is a set. Each set of secondary support shafts (35) is coaxially connected to the main support shaft (37) through a connector (36). The connector (36) can be disengaged from the main support shaft (37). A roller-shaped brush bristle is coaxially fixed in the middle of the main support shaft (37).

9. A pastry baking apparatus according to claim 8, characterized in that: The connector (36) includes a connecting cylinder (38) and a tightening bolt (39). The main support shaft (37) and the secondary support shaft (35) are both virtual hexagonal prisms with the same inscribed circle diameter. The connecting cylinder (38) is a hexagonal cylinder that matches the main support shaft (37) and the secondary support shaft (35). The connecting cylinder (38) is slidably connected to the main support shaft (37) and the secondary support shaft (35). The connecting cylinder (38) is radially threaded with a tightening bolt (39). The tightening bolt (39) can be tightened against the outer wall of the main support shaft (37) or the secondary support shaft (35). When the connecting cylinder (38) is pushed by an external force to a certain position, it can be slidably connected only to the main support shaft (37) or the secondary support shaft (35).

10. A pastry baking apparatus according to claim 8, characterized in that: The connector (36) includes a connecting cylinder (38), a support ring (40), and a compression spring (41). The main support shaft (37) and the secondary support shaft (35) are both virtual hexagonal prisms with the same inscribed circle diameter. The support cylinder (3) is a hexagonal cylinder that matches the main support shaft (37) and the secondary support shaft (35). The connecting cylinder (38) is slidably connected to the main support shaft (37) and the secondary support shaft (35). Each of the secondary support shafts (35) is coaxially fixed with a support ring (40), and each of the support rings (40) is axially fixed. There is a spiral compression spring (41), which is inserted into the secondary support shaft (35) with a gap. The end of the compression spring (41) is fixed to the connecting cylinder (38). The connecting cylinder (38) is pushed by an external force to move towards the secondary support shaft (35) and can disengage from the sliding connection with the main support shaft (37) when it moves to a certain position. Under the elastic repulsive force of the compression spring (41), the connecting cylinder (38) has a tendency to slide along the secondary support shaft (35) and simultaneously slide with the secondary support shaft (35) and the main support shaft (37).

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