Multi-station rotary head for a grinding machine

Abstract

The application provides a grinding machine multi-station turret, and belongs to the technical field of machinery. The grinding machine multi-station turret solves the problem of low efficiency of the existing grinding machine. The grinding machine multi-station turret comprises a base and a thread grinding assembly, the thread grinding assembly comprises an electric spindle for mounting a grinding wheel, the base is provided with a driving mechanism and a rotating shaft, the rotating shaft is horizontally arranged on the base, the driving mechanism is used for driving the rotating shaft to swing around the central axis of the rotating shaft, the thread grinding assembly has two groups, the two ends of the rotating shaft are fixedly connected with two electric spindles through swing arms respectively, the electric spindles can swing to be horizontally arranged so that the central axes of the electric spindles are perpendicular to the central axis of the rotating shaft, a brake assembly for locking or releasing the rotating shaft is further arranged between the base and the rotating shaft, and the brake assembly locks the rotating shaft when the thread grinding assembly operates, a rotary table is arranged below the base, the rotary table has a vertical rotary axis, and the rotary table is used for driving the base to rotate around the rotary axis so that the two thread grinding assemblies are exchanged in position. The grinding machine multi-station turret has high efficiency.

Description

Technical Field

[0001] The invention belongs to the field of mechanical technology and relates to a grinding machine, in particular to a multi-station turret of a grinding machine. Background Art

[0002] A grinder is a machine tool that uses a high-speed rotating grinding wheel to perform precision grinding on the surface of a workpiece. It is mainly used to improve the dimensional accuracy, shape accuracy and surface roughness of the workpiece.

[0003] The existing grinding machine structure is such as an internal and external thread grinder with an in-situ grinding wheel shape-adjustable disclosed in the China Patent Library (application number: 202010879149.7), which includes: a bed, a Z-axis drive screw assembly, a worktable, a workpiece headstock, a swingable angle dresser, an X-axis drive screw assembly and an A-axis turntable, a turntable base; it also includes a grinding wheel headstock or an internal grinding head assembly; it also optionally includes: a tailstock; the movement direction of the worktable relative to the bed is set to the Z-axis direction; the worktable reciprocates linearly along the Z-axis direction; the X-axis is defined to be perpendicular to the Z-axis, and the turntable base reciprocates linearly along the X-axis direction; the worktable and the turntable base are arranged on the bed, the workpiece headstock and the tailstock are arranged on the worktable, and the workpiece headstock is provided with a rotating axis C, the rotating axis C, that is, the C-axis, which can be installed with a card The disc or center, when the tailstock is set, the tailstock cooperates with the workpiece headstock to hold the workpiece; the A-axis turntable is arranged on the turntable base, and the A-axis turntable can rotate on the turntable base. The rotation axis is defined as the A-axis, and the rotation axis rotates around the X-axis direction. The grinding wheel headstock or the inner grinding head assembly can be fixed to the side of the A-axis turntable opposite to the worktable with bolts; the grinding wheel headstock can be installed with a large diameter grinding wheel, and the inner grinding head assembly can be installed with a small diameter grinding wheel, and the angle of the large diameter grinding wheel or the small diameter grinding wheel can be adjusted by rotating the axis A; the Z-axis drive screw assembly is installed between the worktable and the bed, and can drive the worktable to reciprocate linearly along the Z-axis direction; the X-axis drive screw assembly is installed between the turntable base and the bed, and can drive the turntable base to reciprocate linearly along the X-axis direction.

[0004] In the above-mentioned grinder, the components for grinding internal and external threads are installed in the same position, and the replacement of the two is done manually, which is not only inconvenient to operate, but also requires a long downtime for switching, affecting processing efficiency. Summary of the Invention

[0005] The purpose of the present invention is to solve the above problems in the existing technology and to provide a multi-station turret for a grinding machine that can improve working efficiency.

[0006] The objectives of the present invention can be achieved through the following technical solutions: a multi-station turret of a grinding machine, comprising a base and a thread grinding assembly, the thread grinding assembly comprising an electric spindle for mounting a grinding wheel, characterized in that a driving mechanism and a rotating shaft are provided on the base, the rotating shaft is horizontally rotatably arranged on the base, and the driving mechanism is used to drive the rotating shaft to swing around its own central axis; there are two groups of thread grinding assemblies, both ends of the rotating shaft are respectively fixedly connected to the two electric spindles by swing arms, and the electric spindles can be swung to a horizontal setting so that the central axis of the electric spindle is perpendicular to the central axis of the rotating shaft; a brake assembly for locking or releasing the rotating shaft is also provided between the base and the rotating shaft, and the brake assembly locks the rotating shaft when the thread grinding assembly is running; a turntable is provided under the base, and the turntable has a vertically arranged rotation axis, and the turntable is used to drive the base to rotate around the rotation axis so that the two thread grinding assemblies can interchange positions.

[0007] In actual products, a large grinding wheel and a small grinding wheel are respectively installed on the two electric spindles, so that the two thread grinding assemblies are used to grind external threads and internal threads respectively.

[0008] When in use, the electric spindle is first driven to swing by rotating the shaft to adjust the cutting angle of the grinding wheel. After the adjustment is completed, the brake assembly locks the shaft, one set of thread grinding assemblies runs to grind threads, and the other set of thread grinding assemblies is in a stopped state. After the thread grinding process is completed and the grinding wheel cutting angle needs to be adjusted, the brake assembly releases the shaft; when the other set of thread grinding assemblies needs to be operated, the turntable drives the base to rotate 180 degrees to rotate the other set of thread grinding assemblies to the processing station.

[0009] With the cooperation of the turntable and the base, the two thread grinding components can automatically interchange positions to adapt to different types of thread processing or to enable the same thread processing to be performed continuously, thereby effectively reducing the downtime required for switching. It has the advantages of ease of use and high efficiency.

[0010] At the same time, the rotating shaft is locked by the brake assembly to ensure the position stability and accuracy of the thread grinding assembly during operation, thereby improving the processing efficiency and accuracy at the same time.

[0011] In the aforementioned multi-station turret for a grinding machine, a mounting hole for accommodating the rotating shaft is formed horizontally through the base. Both ends of the rotating shaft extend through the mounting holes and are fixedly connected to the two aforementioned swing arms. Annular oil seals seal the mounting holes against the outer wall of the rotating shaft. The rotating shaft is partially housed within the base, effectively shortening the distance between components and making the entire structure more compact.

[0012] In the aforementioned multi-station turret of the grinding machine, a vertical hole is defined at the top of the base. The drive mechanism comprises a worm that rotates vertically within the hole and a worm wheel fixed to the shaft. One side of the hole has an opening that connects to the mounting hole, through which the side of the worm extends into the mounting hole and meshes with the worm wheel. A swing motor is also fixed to the top of the base to drive the worm. The drive mechanism utilizes a worm gear transmission, which not only effectively improves the rotational accuracy of the shaft, but also features a strong self-locking capability. When combined with a brake assembly, this significantly enhances the stability of the shaft's locking, thereby improving the quality and precision of thread grinding.

[0013] As another solution, in the above-mentioned multi-station turret of the grinding machine, the driving mechanism is arranged outside the base, and the driving mechanism includes a rotating motor, and the rotating motor drives the rotating shaft to rotate through a belt transmission structure.

[0014] In the multi-station turret of the grinding machine described above, the brake assembly is arranged outside the base and is located between the two swing arms. The brake assembly includes a pressure ring and a fixed ring, both of which are sleeved on the rotating shaft. The fixed ring is located between the pressure ring and the base, and the two ends of the fixed ring are respectively fixed to the pressure ring and the base. The pressure ring is elastic and extends toward the base to form a thin-walled ring body integrally formed therein. The thin-walled ring body is sleeved on the rotating shaft and the two are in contact and fit. The end of the thin-walled ring body away from the pressure ring contacts the inner wall of the fixed ring. An annular oil chamber is formed between the thin-walled ring body, the pressure ring, and the fixed ring. The annular oil chamber is coaxial with the rotating shaft, and an oil injection hole is penetrated on the side wall of the fixed ring to connect the annular oil chamber to the outside. When in use, hydraulic oil is injected into the annular oil chamber through the oil injection hole, forcing the thin-walled ring body to undergo elastic deformation and come into closer contact with the rotating shaft, thereby achieving the purpose of locking the rotating shaft. The structure is simple and easy to install.

[0015] In the above-mentioned multi-station turret of the grinding machine, the swing arm is detachably fixed to the rotating shaft by a circle of screw one, and the fixed ring is detachably fixed to the base by a circle of screw two, and screw two is located outside the annular oil chamber. In this way, after removing the swing arm close to the fixed ring, the brake assembly can be exposed, and the brake assembly can be disassembled and assembled, which is convenient for subsequent maintenance.

[0016] In the aforementioned multi-station turret of the grinding machine, both the thin-walled ring and the retaining ring have an L-shaped axial cross-section. The end face of the retaining ring facing away from the base presses against the pressure ring, while the other end of the retaining ring is clamped between the thin-walled ring and the base. When hydraulic oil is injected into the annular oil chamber, it forces both ends of the thin-walled ring to elastically deform, enhancing the overall positioning strength and stability of the entire holding brake assembly, further strengthening the locked shaft.

[0017] In the above-mentioned multi-station turret of the grinding machine, one end of the fixed ring away from the base forms a seal with the pressure ring through the annular sealing gasket 1; the other end of the fixed ring forms a seal with the thin-walled ring body through the annular sealing gasket 2.

[0018] In the multi-station turret of the above-mentioned grinder, the thin-walled ring body and the rotating shaft are contacted and matched through a conical surface, which not only improves the installation accuracy of the brake assembly, but also increases the contact area between the thin-walled ring body and the rotating shaft, thereby improving the locking performance.

[0019] Compared with the existing technology, the multi-station turret of this grinder has the following advantages:

[0020] 1. With the cooperation of the turntable and the base, the two thread grinding components can be automatically interchanged to adapt to different types of thread processing or to enable the same thread processing to be carried out continuously, so as to effectively reduce the downtime required for switching, and have the advantages of easy use and high efficiency.

[0021] 2. The rotating shaft is locked by the brake assembly to ensure the position stability and accuracy of the thread grinding assembly during operation, thereby improving the processing efficiency and accuracy at the same time.

[0022] 3. The swing arm is detachably connected to the rotating shaft through a circle of screws 1, and the fixing ring is detachably connected to the base through a circle of screws 2. In this way, after removing the swing arm close to the fixing ring, the brake assembly can be exposed, and the brake assembly can be disassembled and assembled, which is convenient for subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional schematic diagram of a grinding machine.

[0024] Figure 2 It is a three-dimensional schematic diagram of the multi-station turret of the grinding machine.

[0025] Figure 3 It is a cross-sectional schematic diagram of the multi-station turret of the grinding machine.

[0026] Figure 4 It is a cross-sectional schematic diagram of the grinding machine multi-station turret in another direction.

[0027] Figure 5 yes Figure 4 Enlarged schematic diagram of point A in the middle.

[0028] In the figure, 1. workbench; 2. headstock; 3. tailstock; 4. support plate; 5. turntable; 6. base; 6a. mounting hole; 6b. straight hole; 7. thread grinding assembly; 7a. electric spindle; 7b. grinding wheel; 8. rotating shaft; 9. swing arm; 10. annular oil seal; 11. worm; 12. worm gear; 13. swing motor; 14. connecting sleeve; 15. pressure ring; 15a. thin-walled ring body; 16. fixing ring; 16a. oil filling hole; 17. annular oil chamber; 18. screw 2; 19. annular sealing gasket 1; 20. annular sealing gasket 2; 21. grinding assembly. DETAILED DESCRIPTION

[0029] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0030] Example 1: Figure 1 As shown, in the multi-station turret of the grinder, the grinder includes a workbench 1 and a headstock 2, a tailstock 3 and a pallet 4 all arranged on the workbench 1. Among them, the headstock 2 and the tailstock 3 are arranged side by side on the left and right, and are used to support the workpiece in horizontal rotation; the pallet 4 is arranged on the rear side of the headstock 2, and the pallet 4 is set on the base 6 by sliding back and forth through a linear guide and a slider. The base 6 is provided with a motor, and the motor drives the pallet 4 to move through a screw and nut transmission mechanism. In the actual product, the specific structure and installation method of the headstock 2 and the tailstock 3 are existing, and are not the invention point of this application. The specific structure of this part can be referred to the internal and external thread grinder with in-situ grinding wheel trimming disclosed in the Chinese Patent Library (application number: 202010879149.7), which will not be elaborated here.

[0031] The multi-station turret of this grinding machine is mounted on a support plate 4 and comprises a turntable 5, a base 6, and a thread grinding assembly 7. The turntable 5 is mounted on the carriage and is commercially available. It has a vertical axis of rotation. The base 6 is mounted above the turntable 5 and is fixedly connected to the spindle of the turntable 5, driving the base 6 to rotate about the axis of rotation. The thread grinding assembly 7 includes an electric spindle 7a for mounting a grinding wheel 7b.

[0032] like Figure 2 and Figure 3 As shown, the base 6 is equipped with a drive mechanism and a rotating shaft 8. The rotating shaft 8 is horizontally mounted on the base 6, and the drive mechanism is used to drive the rotating shaft 8 to swing about its central axis. There are two sets of thread grinding assemblies 7. Each end of the rotating shaft 8 is fixedly connected to the two electric spindles 7a via swing arms 9. The rotating shaft 8 rotates, allowing the electric spindles 7a to swing horizontally so that their central axes are perpendicular to the central axes of the rotating shaft 8. When the base 6 rotates 180 degrees, the two thread grinding assemblies 7 swap positions. A brake assembly is also located between the base 6 and the rotating shaft 8 for locking or releasing the rotating shaft 8. The brake assembly locks the rotating shaft 8 when the thread grinding assembly 7 is in operation and releases it when the rotating shaft 8 rotates. Further, the base 6 has a horizontal mounting hole 6a extending through it for accommodating the rotating shaft 8. Both ends of the rotating shaft 8 extend out of the mounting hole 6a and are fixedly connected to the two aforementioned swing arms 9. Both ends of the mounting hole 6a are sealed to the outer wall of the rotating shaft 8 by an annular oil seal 10. The rotating shaft 8 is partially accommodated in the base 6, which can effectively shorten the distance between the various components and make the entire structure compact.

[0033] In actual products, a large grinding wheel 7b and a small grinding wheel 7b are respectively installed on the two electric spindles 7a, so that the two thread grinding assemblies 7 are used for grinding external threads and internal threads respectively.

[0034] When in use, the electric spindle 7a is driven to swing by rotating the rotating shaft 8 to adjust the cutting angle of the grinding wheel 7b. After the adjustment is completed, the brake assembly locks the rotating shaft 8, one group of thread grinding assemblies 7 runs to grind threads, and the other group of thread grinding assemblies 7 is in a stopped state. After the thread grinding process is completed and the cutting angle of the grinding wheel 7b needs to be adjusted, the brake assembly releases the rotating shaft 8; when the other group of thread grinding assemblies 7 needs to be run, the turntable 5 drives the base 6 to rotate 180 degrees to rotate the other group of thread grinding assemblies 7 to the processing station.

[0035] With the cooperation of the turntable 5 and the base 6, the two thread grinding assemblies 7 can automatically interchange positions to adapt to different types of thread processing or to enable the same thread processing to be performed continuously, so as to effectively reduce the downtime required for switching, and has the advantages of ease of use and high efficiency.

[0036] At the same time, the rotating shaft 8 is locked by the brake assembly to ensure the position stability and accuracy of the thread grinding assembly 7 during operation, thereby improving the processing efficiency and accuracy at the same time.

[0037] In this embodiment,

[0038] The rotating shaft 8 is rotatably supported on the inner wall of the mounting hole 6a by rolling bearings. There are at least two rolling bearings distributed axially along the rotating shaft 8, and all rolling bearings are disposed between corresponding annular oil seals 10. The specific installation method of the rolling bearings is conventional and will not be described in detail here.

[0039] like Figure 2 and Figure 3 As shown, the drive mechanism is specifically as follows: a straight hole 6b is vertically defined at the top of the base 6. The drive mechanism includes a worm 11 that rotates vertically within the straight hole 6b and a worm wheel 12 fixed to the rotating shaft 8. One side of the straight hole 6b has an opening that communicates with the mounting hole 6a. The side of the worm 11 extends through the opening into the mounting hole 6a and meshes with the worm wheel 12. A swing motor 13 is also fixed to the top of the base 6 for driving the worm 11 in rotation. The drive mechanism utilizes a worm wheel 12 and worm 11 transmission, which not only effectively improves the rotational accuracy of the rotating shaft 8, but also the worm wheel 12 and worm 11 transmission itself has a good self-locking capability. When combined with a brake assembly, this greatly enhances the stability of the locked rotating shaft 8, thereby improving the quality and accuracy of thread grinding.

[0040] in,

[0041] At least one of the above-mentioned rolling bearings is provided on both axial sides of the worm wheel 12 .

[0042] The swing motor 13 is connected to the upper end of the worm 11 through a coupling.

[0043] The worm 11 is mounted as follows: The straight hole 6b is through-hole, with connecting sleeves 14 sealed and fixed at each end. These sleeves 14 are respectively fitted over the ends of the worm 11, and the sleeves 14 and worm 11 are also rotatably engaged via rolling bearings. Furthermore, the inner wall of the connecting sleeve 14 is also sealed against the worm 11 by an annular oil seal 10, with the two rolling bearings connected to the worm 11 positioned between the two corresponding annular oil seals 10.

[0044] like Figure 2 、 Figure 4 and Figure 5 As shown, the brake assembly is specifically configured as follows: the brake assembly is disposed outside the base 6 and positioned between the two swing arms 9. The brake assembly comprises a pressure ring 15 and a fixed ring 16, both of which are sleeved on the rotating shaft 8. The fixed ring 16 is positioned between the pressure ring 15 and the base 6, with both ends of the fixed ring 16 fixedly connected to the pressure ring 15 and the base 6, respectively. The pressure ring 15 is made of an elastic material to impart elasticity. The elastic material can be spring steel or plastic, and preferably, the pressure ring 15 is made of spring steel. The pressure ring 15 extends toward the base 6 and is integrally formed with a thin-walled ring body 15a. The thin-walled ring body 15a and the pressure ring 15 form an integrated structure. The thin-walled ring body 15a is sleeved on the rotating shaft 8 and the two are in contact with each other. The end of the thin-walled ring 15a, facing away from the pressure ring 15, contacts the inner wall of the retaining ring 16. An annular oil chamber 17 is formed between the thin-walled ring 15a, the pressure ring 15, and the retaining ring 16. This annular oil chamber 17 is coaxial with the rotating shaft 8, and an oil inlet hole 16a is provided through the sidewall of the retaining ring 16, connecting the annular oil chamber 17 to the outside. During use, hydraulic oil is injected into the annular oil chamber 17 through the oil inlet hole 16a, forcing the thin-walled ring 15a to elastically deform and more closely contact the rotating shaft 8, thereby locking the rotating shaft 8. This design offers advantages such as a simple structure and easy installation. The pressure ring 15 has a certain thickness, which prevents it from deforming under the influence of oil pressure. The retaining ring 16 also has a high hardness, which prevents it from deforming under the influence of oil pressure.

[0045] The connection between the pressure ring 15, the fixed ring 16, and the base 6 is as follows: the two end faces of the fixed ring 16 press against the pressure ring 15 and the base 6, respectively. The fixed ring 16 is fixed to the base 6 via a circle of screws 18 evenly distributed along the circumference of the fixed ring 16. The screws 18 are located outside the annular oil chamber 17, and the heads of the screws 18 are positioned toward the pressure ring 15. The pressure ring 15 and the fixed ring 16 are fixed by welding. Further, the base 6 is provided with an annular step that matches the fixed ring 16. The fixed ring 16 is inserted into the annular step and pressed against the bottom wall of the annular step to facilitate the assembly and disassembly of the fixed ring 16. Furthermore, the swing arm 9 is detachably fixed to the rotating shaft 8 via a circle of screws. By removing the swing arm 9 near the fixed ring 16, the brake assembly can be exposed, enabling the assembly and disassembly of the brake assembly and facilitating subsequent maintenance.

[0046] like Figure 4 and Figure 5 As shown, both the thin-walled ring body 15a and the retaining ring 16 have an L-shaped axial cross-section. The end face of the retaining ring 16 facing away from the base 6 presses against the pressure ring 15, while the other end of the retaining ring 16 is clamped between the thin-walled ring body 15a and the base 6. At this point, both sides of the other end of the retaining ring 16 press against the thin-walled ring body 15a and the base 6, respectively. When hydraulic oil is injected into the annular oil chamber 17, the hydraulic oil forces both ends of the thin-walled ring body 15a to elastically deform, enhancing the overall positioning strength and stability of the brake assembly, thereby further strengthening the locking shaft 8. Further explanation: the end of the retaining ring 16 facing away from the base 6 forms a seal with the pressure ring 15 via annular seal 19; the other end of the retaining ring 16 forms a seal with the thin-walled ring body 15a via annular seal 20. In actual production, the retaining ring 16 is provided with two annular grooves for mounting annular seals 19 and 20, respectively.

[0047] Furthermore, the thin-walled ring body 15a and the rotating shaft 8 are in contact with each other through a conical surface. That is, at this time, there is a conical surface 1 on the outer wall of the rotating shaft 8, and the diameter of the conical surface 1 gradually increases from the pressure ring 15 to the fixed ring 16. There is a conical surface 2 on the inner wall of the thin-walled ring body 15a that matches the conical surface 1, and the conical surface 1 and the conical surface 2 are in close contact. This not only improves the installation accuracy of the brake assembly, but also increases the contact area between the thin-walled ring body 15a and the rotating shaft 8, thereby improving the locking performance.

[0048] In the actual product, the base 6 is also equipped with two grinding assemblies 21, which are used for grinding the outer circle and the inner hole respectively. Both grinding assemblies 21 and the two thread grinding assemblies 7 are conventional. The two grinding assemblies 21 and the two thread grinding assemblies 7 are alternately arranged around the rotation axis, forming a four-station structure in the turret. The base 6 can be rotated 90 degrees to switch between stations.

[0049] Embodiment 2: The structure and principle of this embodiment 2 are basically the same as those of embodiment 1, except that the driving mechanism is arranged outside the base 6, the driving mechanism includes a rotating motor, and the rotating motor drives the rotating shaft 8 to rotate through a belt transmission structure.

[0050] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A multi-station turret for a grinding machine, comprising a base (6) and a thread grinding assembly (7), wherein the thread grinding assembly (7) comprises an electric spindle (7a) for mounting a grinding wheel (7b), characterized in that: A driving mechanism and a rotating shaft (8) are provided on the base (6), the rotating shaft (8) is horizontally rotatably arranged on the base (6), and the driving mechanism is used to drive the rotating shaft (8) to swing around its own central axis; there are two groups of thread grinding assemblies (7), both ends of the rotating shaft (8) are respectively connected to two electric spindles (7a) through swing arms (9), and the electric spindles (7a) can swing to a horizontal setting so that the central axis of the electric spindle (7a) is perpendicular to the central axis of the rotating shaft (8); a locking mechanism for locking or releasing the rotating shaft (8) is also provided between the base (6) and the rotating shaft (8). The brake assembly locks the rotating shaft (8) when the thread grinding assembly (7) is running; a turntable (5) is provided below the base (6), the turntable (5) has a vertically arranged rotation axis, and the turntable (5) is used to drive the base (6) to rotate around the rotation axis so that the two thread grinding assemblies (7) exchange positions; a mounting hole (6a) for accommodating the rotating shaft (8) is horizontally penetrated on the base (6), and both ends of the rotating shaft (8) extend out of the mounting hole (6a) and are respectively fixedly connected to the two above-mentioned swing arms (9), and the mounting hole (6a) Both ends are sealed by an annular oil seal (10) and the outer wall of the rotating shaft (8); the brake assembly is arranged outside the base (6), and the brake assembly is located between the two swing arms (9); the brake assembly includes a pressure ring (15) and a fixed ring (16) both of which are sleeved on the rotating shaft (8); the fixed ring (16) is located between the pressure ring (15) and the base (6), and the two ends of the fixed ring (16) are respectively fixedly connected to the pressure ring (15) and the base (6); the pressure ring (15) has elasticity and extends toward the base (6). A thin-walled ring body (15a) is integrally formed, and the thin-walled ring body (15a) is sleeved on the rotating shaft (8) and the two are in contact and fit; the end of the thin-walled ring body (15a) away from the pressure ring (15) is in contact with the inner wall of the fixed ring (16), and an annular oil chamber (17) is formed between the thin-walled ring body (15a), the pressure ring (15) and the fixed ring (16). The annular oil chamber (17) is coaxial with the rotating shaft (8), and an oil injection hole (16a) is penetrated on the side wall of the fixed ring (16) so that the annular oil chamber (17) is connected to the outside.

2. The multi-station turret of the grinding machine according to claim 1, characterized in that: A straight hole (6b) is vertically opened on the top of the base (6), and the driving mechanism includes a worm (11) vertically rotatably arranged in the straight hole (6b) and a worm wheel (12) fixed on the rotating shaft (8). One side of the straight hole (6b) has an opening connected to the mounting hole (6a), and the side of the worm (11) extends into the mounting hole (6a) through the opening and engages with the worm wheel (12). A swing motor (13) for driving the worm (11) to rotate is also fixed on the top of the base (6).

3. The multi-station turret of the grinding machine according to claim 1, characterized in that: The driving mechanism is arranged outside the base (6), and the driving mechanism includes a rotating motor, and the rotating motor drives the rotating shaft (8) to rotate through a belt transmission structure.

4. The multi-station turret of the grinding machine according to claim 1, characterized in that: The swing arm (9) is detachably fixedly connected to the rotating shaft (8) through a circle of screws (1), and the fixing ring (16) is detachably fixedly connected to the base (6) through a circle of screws (18), and the screws (18) are located outside the annular oil chamber (17).

5. The multi-station turret of the grinding machine according to claim 1, characterized in that: The axial cross-sections of the thin-walled ring body (15a) and the fixed ring (16) are both L-shaped, the end face of the fixed ring (16) away from the base (6) is pressed on the pressure ring (15), and the other end of the fixed ring (16) is clamped between the thin-walled ring body (15a) and the base (6).

6. The multi-station turret of the grinding machine according to claim 5, characterized in that: One end of the fixing ring (16) away from the base (6) forms a seal with the pressure ring (15) through the annular sealing gasket 1 (19); the other end of the fixing ring (16) forms a seal with the thin-walled ring body (15a) through the annular sealing gasket 2 (20).

7. The multi-station turret of the grinding machine according to claim 1, characterized in that: The thin-walled ring body (15a) and the rotating shaft (8) are in contact with each other through a conical surface.

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