Laser compound machining device for inclined hole

Abstract

The application discloses a kind of laser composite processing devices of inclined hole, belong to laser positioning technical field.The device includes frame body, and the frame body is installed with placing table, and the placing table is horizontally slidably installed with electric sliding seat, and the electric sliding seat is horizontally slidably installed with electric sliding platform, and the electric sliding platform is vertically installed with electric sliding rail, and the electric sliding rail is slidably installed with mounting seat, and the mounting seat is rotatably installed with conversion pedestal, and the mounting seat is installed with transmission assembly for driving conversion pedestal rotation.The application can extract the smoke and dust generated by laser drill bit through smoke suction assembly, reduce the number of cleaning of staff, effectively reduce the workload of staff, improve work efficiency, and after positioning hole is opened, the conversion pedestal can be rotated by 180 degrees by transmission assembly at this time, without additional adjustment of workpiece or moving mounting seat, without secondary transfer workpiece effectively improving work efficiency.

Description

Technical Field

[0001] This invention relates to the field of laser positioning technology, and in particular to a laser composite processing device for oblique holes. Background Technology

[0002] Traditional inclined hole machining mainly relies on specialized fixtures for positioning or machine tool angle adjustments. When the drill bit contacts the workpiece surface at an inclined angle, the cutting force distribution is uneven, easily causing the drill bit to deviate. To solve this problem, Existing technologies generally employ a step-by-step process of laser pre-drilling combined with mechanical reaming. However, this process typically requires transferring the workpiece between two independent machines: first, the laser machine processes the pilot hole, and then the workpiece is transferred to the drilling machine for subsequent processing. This operation method makes it easy for positioning errors to occur during the secondary clamping of the workpiece, resulting in a decrease in hole position accuracy. At the same time, workpiece transfer increases process time and labor costs, reducing overall efficiency.

[0003] In addition, the large amount of smoke and dust generated during laser processing requires repeated cleaning by staff, and there is a lack of effective integrated smoke and dust treatment devices for existing equipment. Summary of the Invention

[0004] This invention provides a laser composite processing device for oblique holes, which can solve the problems of cumbersome steps and the generation of a large amount of smoke and dust during the laser positioning process in the prior art.

[0005] A laser composite processing device for oblique holes includes a frame, on which a placement platform is mounted. An electric slide block is horizontally slidably mounted on the placement platform, and an electric slide table is horizontally slidably mounted on the electric slide block. An electric slide rail is vertically mounted on the electric slide rail, and a mounting seat is slidably mounted on the electric slide rail. A conversion platform is rotatably mounted on the mounting seat, and a transmission component for driving the conversion platform to rotate is mounted on the mounting seat. The conversion platform has two opposing mounting surfaces, on which a laser drill bit and an electric drill bit are respectively mounted. A fume extraction component is also mounted on the frame. When the laser drill bit is performing positioning drilling, the fume extraction component extracts the fume to the outside of the frame.

[0006] Furthermore, the conversion platform is rotatably mounted on the mounting base via a shaft. The transmission assembly includes a drive gear mounted on the shaft. A drive rack that meshes with the drive gear is slidably mounted on the mounting base. A connecting frame is mounted on the mounting base. A drive screw is rotatably mounted on the connecting frame. A connecting plate threaded onto the drive screw is constructed on one side of the drive rack. A motor for driving the drive screw to rotate is mounted on the connecting frame.

[0007] Furthermore, the smoke and dust extraction assembly includes an exhaust assembly mounted on the frame, a dust collection assembly installed on the electric slide rail, and an exhaust hood installed on the mounting base. One side of the exhaust hood is open and equipped with a filter screen. A flexible tube connects the exhaust hood and the dust collection assembly. Smoke and dust are discharged outside the frame by passing through the exhaust hood, the dust collection assembly, and the exhaust assembly in sequence.

[0008] Furthermore, the dust collection assembly includes a fixed box mounted on the electric slide rail. One side of the fixed box is open and a baffle is inserted therein. The baffle and the fixed box form a cavity. A dust collector bag is provided in the cavity. One side of the dust collector bag is open and the open surface is connected to the baffle. The flexible tube passes through the dust collector bag and is located inside. One side of the fixed box is connected to an exhaust pipe, which is connected to an exhaust assembly.

[0009] Furthermore, the frame is provided with an installation cavity, and the exhaust assembly includes an exhaust fan installed in the installation cavity. The exhaust port of the exhaust fan is connected to an exhaust pipe. An exhaust trough is provided on the frame and communicates with the installation cavity. A protective screen plate is installed at one end of the exhaust trough.

[0010] Furthermore, the suction pipe is a flexible hose with a reserved length for movement. A mounting plate is connected to one side of the frame, and a combing cylinder is vertically mounted on the mounting plate. The suction pipe passes through the combing cylinder, and a ring plate is mounted on one side of the suction pipe near the combing cylinder. A pre-tensioning spring is installed between the ring plate and the combing cylinder, and the pre-tensioning spring keeps the connection between the ring plate of the suction pipe and the mounting cavity taut.

[0011] Furthermore, the baffle is provided with a threaded cylinder, which is connected to the dust collector bag, and a sealing cap is screwed onto the threaded cylinder.

[0012] Furthermore, an installation plate is mounted on the electric slide, a rotating disk is rotatably mounted on the installation plate, a motor for driving the rotating disk to rotate is mounted on the installation plate, and the electric slide rail is mounted on the rotating disk.

[0013] Furthermore, a connecting seat is installed on the placement platform, a bearing seat is vertically rotatably installed on the connecting seat, an adjustment component for driving the bearing seat to rotate is installed on the connecting seat, a pressure plate is symmetrically slidably installed on the bearing seat, a bidirectional screw is rotatably installed on the bearing seat, and the two pressure plates are respectively threaded onto the bidirectional screw.

[0014] Furthermore, the adjusting assembly includes a sliding plate that is horizontally slidably mounted on the connecting seat, a connecting rod that is hinged to the sliding plate, one end of the connecting rod that is hinged to the bearing seat, a transmission screw that is horizontally and rotatably mounted on the bearing seat, and the sliding plate that is threadedly fitted onto the transmission screw.

[0015] Beneficial effects: This invention uses a smoke and dust extraction component to extract the smoke and dust generated by the laser drill bit, reducing the number of times workers need to clean, effectively reducing their workload, and improving work efficiency. After the positioning hole is opened, the conversion platform can be rotated 180 degrees by the transmission component, without the need for additional workpiece adjustment or moving the mounting base, and without the need for secondary workpiece transfer, which effectively improves work efficiency. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 For the present invention Figure 1 Partial three-dimensional sectional view; Figure 3 For the present invention Figure 1 Another partial sectional view; Figure 4 For the present invention Figure 1 Another partial three-dimensional sectional view; Figure 5 For the present invention Figure 4 Enlarged view of the structure at point A in the middle; Figure 6 This is an exploded view of part of the structure of the present invention; Figure 7 This is a partial structural illustration of the present invention; Figure 8 For the present invention Figure 7 Another perspective illustration; Figure 9 For the present invention Figure 8 Partial three-dimensional sectional view; Figure 10 This is a structural illustration of another part of the present invention; Figure 11 For the present invention Figure 10 Another perspective illustration.

[0017] Explanation of reference numerals in the attached figures: 1. Frame; 2. Placement platform; 3. Electric slide; 4. Electric slide table; 5. Electric slide rail; 6. Mounting base; 7. Conversion platform; 8. Transmission assembly; 801. Drive gear; 802. Drive rack; 803. Connecting frame; 804. Drive screw; 805. Connecting plate; 9. Laser drill bit; 10. Electric drill bit; 11. Smoke and dust extraction assembly; 1101. Exhaust hood; 1102. Filter screen; 1103. Flexible tube; 12. Exhaust assembly; 1201. Mounting cavity; 1202. Exhaust fan; 13. Dust collection assembly ; 1301, Fixed box; 1302, Baffle; 1303, Cavity; 1304, Dust collector bag; 1305, Exhaust pipe; 1306, Exhaust duct; 1307, Protective screen plate; 14, Mounting plate; 15, Combing cylinder; 16, Ring plate; 17, Preload spring; 18, Threaded cylinder; 19, Sealing cover; 20, Mounting plate; 21, Rotating plate; 22, Connecting seat; 23, Bearing seat; 24, Adjusting component; 25, Pressure plate; 26, Bidirectional screw; 27, Sliding plate; 28, Connecting rod; 29, Transmission screw. Detailed Implementation

[0018] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0019] like Figures 1 to 11As shown in the figure, an embodiment of the present invention provides a laser composite processing device for oblique holes, including a frame 1, a placement platform 2 mounted on the frame 1, an electric slide block 3 horizontally slidably mounted on the placement platform 2, an electric slide table 4 horizontally slidably mounted on the electric slide block 3, an electric slide rail 5 vertically mounted on the electric slide table 4, and a mounting seat 6 slidably mounted on the electric slide rail 5. The electric slide block 3 and the electric slide table 4 are both prior art, and the mounting seat 6 achieves vertical movement via the electric slide rail 5. This allows for movement along the x, y, and z axes, facilitating control of the mounting base 6's position. A conversion platform 7 is rotatably mounted on the mounting base 6, and a transmission assembly 8 for driving the conversion platform 7's rotation is also mounted on the mounting base 6. The conversion platform 7 has two opposing mounting surfaces, on which a laser drill bit 9 and an electric drill bit 10 are respectively mounted. A dust extraction assembly 11 is also mounted on the frame 1. When the laser drill bit 9 performs positioning drilling, the dust extraction assembly 11 extracts the dust to the frame 1. Externally, when it is necessary to machine a slanted hole on a workpiece, the workpiece is first mounted on the placement table 2 using a fixture (which can be an existing technology). After the workpiece is clamped in the fixture, the laser drill bit 9 is moved to the position where the positioning hole needs to be opened by moving the electric slide 3, the electric slide table 4, and the mounting base 6. After the laser drill bit 9 is in place, it is started to open the positioning hole on the workpiece. During the opening of the positioning hole, the smoke and dust extraction component 11 is activated to extract the smoke and dust generated by the laser drill bit 9, reducing the number of times the workers need to clean, effectively reducing the workload of the workers, and improving work efficiency. After the positioning hole is opened, the conversion table 7 can be rotated 180 degrees by the transmission component 8. It should be noted that the laser drill bit 9 and the electric drill bit 10 are coaxial. After rotating 180 degrees, the rotation of the electric drill bit 10 is exactly coaxial with the laser drill bit 9. There is no need to adjust the workpiece or move the mounting base 6. There is no need to transfer the workpiece twice, which effectively improves work efficiency.

[0020] like Figure 1 and Figure 9As shown, in some embodiments, the conversion platform 7 is rotatably mounted on the mounting base 6 via a shaft. The transmission assembly 8 includes a drive gear 801 mounted on the shaft. A drive rack 802, meshing with the drive gear 801, is slidably mounted on the mounting base 6. A connecting frame 803 is mounted on the mounting base 6, and a drive screw 804 is rotatably mounted on the connecting frame 803. A connecting plate 805, threaded onto the drive screw 804, is constructed on one side of the drive rack 802. A motor for driving the drive screw 804 to rotate is mounted on the connecting frame 803. That is, when the motor starts, it drives the drive screw 804 to rotate. Because the connecting plate 805 is threaded onto the drive screw 804, the drive screw 804 will drive the connecting plate 805 to move during rotation. Because the connecting plate 805 moves with the drive rack 802, the connecting plate 805 will drive the drive rack 802 to move during movement. The drive rack 802 moves, and during this movement, it drives the drive gear 801, which in turn rotates, causing the shaft to rotate, thus rotating the conversion platform 7. Specifically, the connecting frame 803 has a sliding groove to limit the travel of the connecting plate 805. When the connecting plate 805 moves from one side of the sliding groove to the other, the conversion platform 7 rotates 180 degrees, which can accurately control the angle of the conversion platform 7. The drive screw 804 is designed with good self-locking properties, which can prevent the conversion platform 7 from deviating during the drilling process of the electric drill bit 10. Specifically, the drive screw 804 is a fine-pitch screw, which makes the drive platform more stable when the electric drill bit 10 is drilling. It should be explained that when drilling on the workpiece, the guide hole of the laser drill bit 9 is used as the reference first, so the electric drill bit 10 experiences less force during cutting, making the drilling more stable.

[0021] like Figures 1 to 6 As shown, in some embodiments, the smoke and dust extraction assembly 11 includes an exhaust assembly 12 mounted on the frame 1, a dust collection assembly 13 mounted on the electric slide rail 5, and an exhaust hood 1101 mounted on the mounting base 6. One side of the exhaust hood 1101 is open and equipped with a filter screen 1102. A flexible tube 1103 connects the exhaust hood 1101 and the dust collection assembly 13. Smoke and dust are discharged from the frame after sequentially passing through the exhaust hood 1101, the dust collection assembly 13, and the exhaust assembly 12. 1. Externally, that is, the negative pressure is generated at the opening of the exhaust hood 1101 by the exhaust assembly 12, thereby drawing the smoke and dust into the exhaust hood 1101. The design of the filter screen 1102 can prevent iron filings from entering the exhaust hood when the electric drill bit 10 is cutting. After the smoke and dust enter the exhaust hood 1101 and then enter the dust collection assembly 13, the dust will enter the dust collection assembly 13. The filtered air will enter the exhaust assembly 12 and be discharged outside the frame 1, avoiding dust pollution of the workshop.

[0022] like Figures 1 to 4 As shown, in some embodiments, the dust collection assembly 13 includes a fixed box 1301 mounted on the electric slide rail 5. One side of the fixed box 1301 is open and a baffle 1302 is inserted therein. The baffle 1302 and the fixed box 1301 form a cavity 1303. A dust collector bag 1304 is provided inside the cavity 1303. One side of the dust collector bag 1304 is open and the open surface is connected to the baffle 1302. A flexible tube 1103 passes through the dust collector bag 1304 and is located inside. One side of the fixed box 1301 is connected to an exhaust pipe 1305, which is connected to the exhaust assembly 12. That is to say, after the smoke and dust enter the fixed box 1301 through the flexible tube 1103, Because the flexible tube 1103 is located inside the dust collector bag 1304, air in the smoke and dust will pass through the micropores on the surface of the dust collector bag 1304, while the dust will remain inside the dust collector bag 1304, thus collecting the dust in the fixed box 1301. The dust collector bag 1304 is installed on the baffle 1302, and the baffle 1302 is attached to and removed from the fixed box 1301 so that the dust collector bag 1304 can be disassembled. Preferably, bolts are screwed into the threads of the baffle 1302 so that the baffle 1302 can be fixed to the fixed box 1301, which facilitates the disassembly and installation of the dust collector bag 1304.

[0023] like Figures 1 to 6 As shown, in some embodiments, the frame 1 is constructed with an installation cavity 1201, and the exhaust assembly 12 includes an exhaust fan 1202 installed in the installation cavity 1201. The exhaust port of the exhaust fan 1202 is connected to the exhaust pipe 1305. The frame 1 is provided with an exhaust trough 1306, which is connected to the installation cavity 1201. A protective screen plate 1307 is installed at one end of the exhaust trough 1306. When the exhaust fan 1202 is started, the smoke and dust are filtered by the dust collector bag 1304 and then pass through the flexible pipe 1103. That is to say, after the exhaust fan 1202 is started, the filtered air will enter the exhaust fan 1202 from the exhaust pipe 1305. After passing through the exhaust fan 1202, the air will be discharged from the installation cavity 1201 into the exhaust trough 1306 and then discharged to the outside. The design of the protective screen plate 1307 can effectively prevent external impurities from entering the exhaust trough 1306, thus playing a protective role.

[0024] like Figures 1 to 5As shown, to prevent the suction pipe 1305 from tangling during use, in some embodiments, the suction pipe 1305 is a flexible hose with a reserved length for movement. A mounting plate 14 is connected to one side of the frame 1, and a combing cylinder 15 is vertically mounted on the mounting plate 14. The suction pipe 1305 passes through the combing cylinder 15. A ring plate 16 is installed on one side of the suction pipe 1305 near the combing cylinder 15. A pre-tensioning spring 17 is installed between the ring plate 16 and the combing cylinder 15. The pre-tensioning spring 17 keeps the connection between the ring plate 16 and the mounting cavity 1201 of the suction pipe 1305 taut. When the mounting base 6 moves, the suction pipe 1305 is pulled, and the pre-tensioning spring 17 effectively prevents the suction pipe 1305 from taut. This effectively prevents the suction pipe 1305 from tangling when the mounting base 6 moves, and effectively ensures airflow during vacuuming.

[0025] like Figure 6 As shown, in some embodiments, the baffle 1302 is provided with a threaded cylinder 18, which is connected to the dust collector bag 1304. A sealing cap 19 is screwed into the threaded cylinder 18. When the dust collector bag 1304 is disassembled, in order to facilitate the emptying of the dust inside the dust collector bag 1304, it is only necessary to screw the sealing cap 19 to expose the opening of the threaded cylinder 18, so that the dust can be poured out directly, which is convenient for cleaning the inside of the dust collector bag 1304.

[0026] like Figures 1 to 4 As shown, in some embodiments, the electric slide table 4 is equipped with a mounting plate 20, and a rotating disk 21 is rotatably mounted on the mounting plate 20. The mounting plate 20 is equipped with a motor for driving the rotating disk 21 to rotate. The electric slide rail 5 is mounted on the rotating disk 21. The design of the rotating disk 21 allows the electric slide rail 5 to rotate, thereby making the laser drill bit 9 more flexible and convenient to use when positioning and cutting some oblique holes.

[0027] like Figure 1 , Figure 2 and Figure 10As shown, in some embodiments, a connecting seat 22 is installed on the placement platform 2, and a bearing seat 23 is vertically rotatably installed on the connecting seat 22. An adjusting component 24 for driving the bearing seat 23 to rotate is installed on the connecting seat 22. A pressure plate 25 is symmetrically slidably installed on the bearing seat 23, and a bidirectional screw 26 is rotatably installed on the bearing seat 23. The two pressure plates 25 are respectively threaded onto the bidirectional screw 26. The connecting seat 22 can be bolted to the bearing seat 23. After the workpiece is placed on the bearing seat 23, the bidirectional screw 26 is rotated to bring the two pressure plates 25 closer together, thereby pressing the workpiece together. After the workpiece is pressed, the position of the oblique hole is machined as needed. The position of the bearing seat 23 is adjusted by the adjusting component 24, thereby facilitating the adjustment of the workpiece position.

[0028] like Figure 2 and Figure 10 As shown, in some embodiments, the adjusting assembly 24 includes a sliding plate 27 horizontally slidably mounted on the connecting seat 22. A connecting rod 28 is hinged to the sliding plate 27, and one end of the connecting rod 28 is hinged to the bearing seat 23. A transmission screw 29 is horizontally and rotatably mounted on the bearing seat 23. The sliding plate 27 is threadedly fitted onto the transmission screw 29. That is, when the transmission screw 29 is rotated, it will drive the sliding plate 27, which meshes with it, to move. When the sliding plate 27 moves, it will drive the connecting rod 28, which is hinged to it, to move. Because one end of the connecting rod 28 is hinged to the bearing seat 23, when the sliding plate 27 moves, it will drive the bearing seat 23 to rotate through the connecting rod 28. This allows control of the rotation angle of the bearing seat 23. Furthermore, the threaded engagement has self-locking properties, thus ensuring the stability of the bearing seat 23 during workpiece processing.

[0029] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A laser composite processing device for oblique holes, characterized in that, The system includes a frame (1), on which a placement platform (2) is installed. An electric slide block (3) is horizontally slidably installed on the placement platform (2). An electric slide table (4) is horizontally slidably installed on the electric slide block (3). An electric slide rail (5) is vertically installed on the electric slide table (4). A mounting seat (6) is slidably installed on the electric slide rail (5). A conversion platform (7) is rotatably installed on the mounting seat (6). A transmission component (8) for driving the conversion platform (7) to rotate is installed on the mounting seat (6). The conversion platform (7) has two opposing mounting surfaces, on which a laser drill bit (9) and an electric drill bit (10) are respectively mounted. A smoke extraction component (11) is also installed on the frame (1). When the laser drill bit (9) is drilling a positioning hole, the smoke extraction component (11) can extract the smoke to the outside of the frame (1).

2. The laser composite processing device for oblique holes as described in claim 1, characterized in that, The conversion platform (7) is rotatably mounted on the mounting base (6) via a shaft. The transmission assembly (8) includes a drive gear (801) mounted on the shaft. A drive rack (802) that meshes with the drive gear (801) is slidably mounted on the mounting base (6). A connecting frame (803) is mounted on the mounting base (6). A drive screw (804) is rotatably mounted on the connecting frame (803). A connecting plate (805) threaded onto the drive screw (804) is constructed on one side of the drive rack (802). A motor for driving the drive screw (804) to rotate is mounted on the connecting frame (803).

3. The laser composite processing device for oblique holes as described in claim 1, characterized in that, The dust extraction assembly (11) includes a ventilation assembly (12) installed on the frame (1), a dust collection assembly (13) installed on the electric slide rail (5), and a ventilation hood (1101) installed on the mounting base (6). One side of the ventilation hood (1101) is open and is equipped with a filter screen (1102). A flexible tube (1103) connects the ventilation hood (1101) and the dust collection assembly (13). The dust passes through the ventilation hood (1101), the dust collection assembly (13) and the ventilation assembly (12) in sequence and is discharged outside the frame (1).

4. The laser composite processing device for oblique holes as described in claim 3, characterized in that, The dust collection assembly (13) includes a fixed box (1301) mounted on the electric slide rail (5). One side of the fixed box (1301) is open and a baffle (1302) is inserted therein. The baffle (1302) and the fixed box (1301) form a cavity (1303). A dust collector bag (1304) is provided in the cavity (1303). One side of the dust collector bag (1304) is open and the opening surface is connected to the baffle (1302). The flexible tube (1103) passes through the dust collector bag (1304) and is located inside. One side of the fixed box (1301) is connected to an exhaust pipe (1305), which is connected to the exhaust assembly (12).

5. The laser composite processing device for oblique holes as described in claim 3, characterized in that, The frame (1) has an installation cavity (1201). The exhaust assembly (12) includes an exhaust fan (1202) installed in the installation cavity (1201). The exhaust port of the exhaust fan (1202) is connected to the exhaust pipe (1305). The frame (1) has an exhaust trough (1306) which is connected to the installation cavity (1201). A protective screen plate (1307) is installed at one end of the exhaust trough (1306).

6. The laser composite processing device for oblique holes as described in claim 5, characterized in that, The suction pipe (1305) is a flexible hose with a reserved length for movement. A mounting plate (14) is connected to one side of the frame (1). A combing cylinder (15) is vertically mounted on the mounting plate (14). The suction pipe (1305) passes through the combing cylinder (15). A ring plate (16) is installed on one side of the suction pipe (1305) near the combing cylinder (15). A pre-tensioning spring (17) is installed between the ring plate (16) and the combing cylinder (15). The pre-tensioning spring (17) keeps the connection between the suction pipe (1305) at the ring plate (16) and the mounting cavity (1201) taut.

7. The laser composite processing device for oblique holes as described in claim 4, characterized in that, The baffle (1302) is provided with a threaded cylinder (18), which is connected to the dust collector bag (1304). A sealing cap (19) is screwed into the threaded cylinder (18).

8. The laser composite processing device for oblique holes as described in claim 1, characterized in that, The electric slide (4) is equipped with a mounting plate (20), and a rotating disk (21) is rotatably mounted on the mounting plate (20). The mounting plate (20) is equipped with a motor for driving the rotating disk (21) to rotate, and the electric slide rail (5) is mounted on the rotating disk (21).

9. The laser composite processing device for oblique holes as described in claim 1, characterized in that, A connecting seat (22) is installed on the placement platform (2). A bearing seat (23) is vertically rotatably installed on the connecting seat (22). An adjustment component (24) for driving the bearing seat (23) to rotate is installed on the connecting seat (22). A pressure plate (25) is symmetrically slidably installed on the bearing seat (23). A bidirectional screw (26) is rotatably installed on the bearing seat (23). The two pressure plates (25) are respectively threaded onto the bidirectional screw (26).

10. The laser composite processing device for oblique holes as described in claim 9, characterized in that, The adjusting assembly (24) includes a sliding plate (27) that is horizontally slidably mounted on the connecting seat (22). A connecting rod (28) is hinged to the sliding plate (27). One end of the connecting rod (28) is hinged to the bearing seat (23). A transmission screw (29) is horizontally and rotatably mounted on the bearing seat (23). The sliding plate (27) is threaded onto the transmission screw (29).

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