Machine tool rotary table

Abstract

The utility model relates to the technical field of rotary tables, and particularly discloses a machine tool rotary table which comprises a mounting table, the center of the mounting table is rotationally connected with a rotating shaft through a first bearing, an upper rotating ring is fixed to the upper end of the rotating shaft, the bottom of the upper rotating ring is rotationally connected with the mounting table through a second bearing, and a lower rotating ring is fixed to the lower end of the rotating shaft. The top of the lower rotating ring is rotationally connected with the mounting table through a third bearing. The first lubricating flow channel is formed in the mounting table, lubricating oil is provided for the three sets of bearings through the first lubricating flow channel, the second lubricating flow channel and the third lubricating flow channel, abrasion of rolling bodies is reduced, heat generated by rolling friction is taken away, the precision stability is improved, and the service life of the rotary table is prolonged; when the temperature is increased due to high-speed rotation of the rotating shaft, the conveying pressure of the lubricating oil is increased through the pressurizing assembly, the lubricating oil evaporated due to high temperature in the first lubricating runner, the second lubricating runner and the third lubricating runner is supplemented, and the situation that the lubricating effect is affected due to evaporation of the lubricating oil is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of turntables, in particular to a machine tool turntable. Background Technique

[0002] The machine tool turntable assists in the processing of workpieces, realizes the clamping and rotational positioning of workpieces. The machine tool turntable provides stable support and clamping force to ensure that the workpiece does not move or vibrate during the machining process. And by rotating the workpiece, the cutting tool is made to machine along the surface of the workpiece, providing machining at multiple angles and directions;

[0003] Currently, lubricating oil is delivered regularly according to the processing time. However, when the turntable rotates at high speed, the processing temperature may rise rapidly. Under high temperature conditions, the light components in the lubricating oil inside the turntable are more likely to volatilize, resulting in the overall evaporation of the lubricating oil. Evaporation may cause the performance of the lubricating oil to decline, such as a decrease in viscosity and a weakening of antioxidant performance. For this reason, we propose a machine tool turntable. Content of the Utility Model

[0004] The purpose of the utility model is to provide a machine tool turntable to solve the problem that when the turntable rotates at high speed, the processing temperature may rise rapidly. Under high temperature conditions, the light components in the lubricating oil inside the turntable are more likely to volatilize, resulting in the overall evaporation of the lubricating oil. Evaporation may cause the performance of the lubricating oil to decline, such as a decrease in viscosity and a weakening of antioxidant performance, as mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A machine tool turntable, comprising: a mounting table, the center of the mounting table is rotationally connected with a rotating shaft through a first bearing, the upper end of the rotating shaft is fixed with an upper rotating ring, and the bottom of the upper rotating ring is rotationally connected with the mounting table through a second bearing, the lower end of the rotating shaft is fixed with a lower rotating ring, and the top of the lower rotating ring is rotationally connected with the mounting table through a third bearing;

[0006] It further includes: a first lubricating flow channel, which is opened inside the mounting table, and the output port of the first lubricating flow channel is connected to the first bearing. A second lubricating flow channel and a third lubricating flow channel are opened inside the mounting table to provide lubricating oil for the second bearing and the third bearing respectively, lubricating the three groups of bearings, reducing the wear of the rolling elements and taking away the heat generated by rolling friction. The mounting table, the rotating shaft and the upper rotating ring are all provided with oil discharge channels.

[0007] Among them, a fixed ring is fixed on the outer wall of the installation table, and a pressurizing component is fixed on the outer wall of the fixed ring. When the rotating shaft rotates at high speed and generates high temperature, the lubricating oil delivery pressure is increased through the pressurizing component to maintain the lubrication effect. A storage oil component is arranged at the bottom of the pressurizing component, and the storage oil component provides the stored lubricating oil for the operation of the pressurizing component. The pressurizing component includes a pressurizing cylinder fixed on the outer wall of the fixed ring, and a pressurizing cavity is opened inside the pressurizing cylinder. A rubber piston is inserted into the inner wall of the pressurizing cavity, and a push plate is fixed on the end face of the rubber piston. An oil outlet is opened at one end of the pressurizing cylinder away from the push plate.

[0008] Among them, an oil outlet seat is fixed on the inner wall of the oil outlet, and a first limiting cavity is opened inside the oil outlet seat. A first guard plate is rotatably connected to the inner wall of the first limiting cavity, and the first guard plate is arranged to be inclined in the direction away from the pressurizing cavity.

[0009] Among them, a delivery cavity is opened inside the fixed ring. One end of the delivery cavity is docked with the oil outlet, and the other end of the delivery cavity is respectively docked with the input ports of a first lubricating flow channel, a second lubricating flow channel, and a third lubricating flow channel.

[0010] Among them, the storage oil component includes an oil storage tank fixed at the bottom of the pressurizing cylinder. An oil storage cavity is opened inside the oil storage tank, and an oil filling port is arranged on the side of the oil storage tank.

[0011] Among them, an oil inlet seat is fixed at the bottom of the pressurizing cavity, and a second limiting cavity is opened inside the oil inlet seat. A second guard plate is rotatably connected to the inner wall of the second limiting cavity, and the second guard plate is arranged to be inclined in the direction close to the pressurizing cavity.

[0012] Among them, an oil delivery pipe matched with the oil inlet seat is arranged inside the oil storage tank, and a suction block is fixed at the bottom of the oil delivery pipe. The oil storage tanks are connected through a connecting ring.

[0013] Among them, a connecting frame is fixed on the end face of the push plate, and a pulling plate is rotatably connected to the bottom of the connecting frame through a first movable shaft. The bottom of the pulling plate is rotatably connected to the side of a moving seat through a second movable shaft. A screw rod is threadedly connected inside the moving seat, and the bottom of the screw rod is fixed to the output shaft of a motor. The bottom of the motor is fixed with a first support, and the top of the first support is fixed on the surface of the connecting ring.

[0014] Among them, the top of the motor is rotatably connected to the surface of a top plate, and the outer wall of the top plate is fixed inside the inner wall of the first support through a second support. A counter is fixed on the top of the top plate. A pressing block matched with the counter is fixed on the outer wall of the rotating shaft, and both sides of the pressing block are arc-shaped.

[0015] Among them, a collar is fixed on the side of the moving seat, and a fixing plate is fixed at one end of the collar away from the moving seat. An electromagnet is fixed on the top of the fixing plate. A rubber plug is inserted into the bottom of the oil discharge channel, and a metal sheet matched with the electromagnet is fixed at the bottom of the rubber plug. A pressing switch is fixed on the bottom of the top plate close to one side of the collar.

[0016] The utility model has at least the following beneficial effects:

[0017] Lubricating oil is provided to three groups of bearings through the first lubricating channel, the second lubricating channel and the third lubricating channel, reducing the wear of rolling elements and taking away the heat generated by rolling friction, improving the precision stability and the life of the turntable. When the temperature increases due to the high-speed rotation of the rotating shaft, the pressure increasing component increases the conveying pressure of the lubricating oil to supplement the lubricating oil evaporated inside the first lubricating channel, the second lubricating channel and the third lubricating channel due to high temperature, avoiding the influence on the lubricating effect caused by the evaporation of the lubricating oil. Description of the Drawings

[0018] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a front view sectional schematic diagram of the partial structure of the first lubricating channel and the oil discharge channel of the utility model;

[0020] Figure 3 It is a front view sectional schematic diagram of the partial structure of the second lubricating channel and the third lubricating channel of the utility model;

[0021] Figure 4 It is a front view sectional schematic diagram of the structure of the utility model;

[0022] Figure 5 It is a side view sectional schematic diagram of the structure of the utility model;

[0023] Figure 6 It is a three-dimensional schematic diagram of the partial structure of the pressure increasing component and the oil storage component of the utility model;

[0024] Figure 7 It is a three-dimensional sectional schematic diagram of the partial structure of the pressure increasing cylinder and the oil storage tank of the utility model;

[0025] Figure 8 For the utility model Figure 7 The enlarged schematic diagram of the structure at A in;

[0026] Figure 9 For the utility model Figure 6 The enlarged schematic diagram of the structure at B in;

[0027] Figure 10 It is a three-dimensional schematic diagram of the partial structure of the counter of the utility model.

[0028] In the figure: 11, mounting table; 12, rotating shaft; 13, upper rotating ring; 14, lower rotating ring; 2, pressurizing assembly; 21, pressurizing cylinder; 22, pressurizing chamber; 23, rubber piston; 24, push plate; 25, oil outlet seat; 26, first limiting chamber; 27, first guard plate; 28, oil outlet; 3, oil storage assembly; 31, oil storage tank; 32, oil storage chamber; 33, oil inlet seat; 34, second limiting chamber; 35, second guard plate; 36, oil pipeline; 37, suction block; 38, connecting ring; 39, fuel filling port; 4, fixing ring; 51, connecting frame; 52, pulling plate; 53, moving seat; 54, screw rod; 55, motor; 56, first bracket; 57, top plate; 58, second bracket; 61, first lubricating channel; 62, second lubricating channel; 63, third lubricating channel; 64, oil drainage channel; 71, counter; 72, pressing block; 73, collar; 74, fixing plate; 75, electromagnet; 76, metal sheet; 77, rubber plug; 78, pressing switch. Specific implementation mode

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment 1

[0031] Please refer to Figures 1 to 9 , the present invention provides a technical solution: a machine tool turntable, including: a mounting table 11, the center of the mounting table 11 is rotationally connected to a rotating shaft 12 through a first bearing, the upper end of the rotating shaft 12 is fixed with an upper rotating ring 13, and the bottom of the upper rotating ring 13 is rotationally connected to the mounting table 11 through a second bearing, the lower end of the rotating shaft 12 is fixed with a lower rotating ring 14, and the top of the lower rotating ring 14 is rotationally connected to the mounting table 11 through a third bearing;

[0032] It further includes: a first lubricating channel 61, the first lubricating channel 61 is opened inside the mounting table 11, and the output port of the first lubricating channel 61 is connected to the first bearing. A second lubricating channel 62 and a third lubricating channel 63 are opened inside the mounting table 11, which respectively provide lubricating oil for the second bearing and the third bearing, lubricate the three groups of bearings, reduce the wear of the rolling elements and take away the heat generated by rolling friction. The mounting table 11, the rotating shaft 12 and the upper rotating ring 13 are all provided with an oil drainage channel 64;

[0033] The fixed ring 4 is fixed to the outer wall of the mounting table 11, and a pressurizing component 2 is fixed to the outer wall of the fixed ring 4. When the rotating shaft 12 rotates at high speed and generates high temperature, the conveying pressure of the lubricating oil is increased through the pressurizing component 2 to maintain the lubricating effect. A fuel storage component 3 is arranged at the bottom of the pressurizing component 2, and the fuel storage component 3 provides the stored lubricating oil for the operation of the pressurizing component 2. The lubricating oil is supplied to the three groups of bearings through the first lubricating channel 61, the second lubricating channel 62, and the third lubricating channel 63 respectively, reducing the wear of the rolling elements and taking away the heat generated by rolling friction, improving the precision stability and the service life of the turntable. When the temperature increases due to the high-speed rotation of the rotating shaft 12, the conveying pressure of the lubricating oil is increased through the pressurizing component 2 to supplement the lubricating oil evaporated inside the first lubricating channel 61, the second lubricating channel 62, and the third lubricating channel 63 due to high temperature, avoiding affecting the lubricating effect due to the evaporation of the lubricating oil. The fuel storage component 3 replenishes the lubricating oil inside the pressurizing component 2.

[0034] The pressurizing component 2 includes a pressurizing cylinder 21 fixed to the outer wall of the fixed ring 4, and a pressurizing chamber 22 is formed inside the pressurizing cylinder 21. A rubber piston 23 is inserted into the inner wall of the pressurizing chamber 22, and a push plate 24 is fixed to the end face of the rubber piston 23. An oil outlet 28 is formed at one end of the pressurizing cylinder 21 away from the push plate 24. The rubber piston 23 is used to push the lubricating oil inside the pressurizing cylinder 21, so that the lubricating oil enters the first lubricating channel 61, the second lubricating channel 62, and the third lubricating channel 63 through the oil outlet 28, realizing the pressurized conveying of the lubricating oil and avoiding the evaporation of the lubricating oil from affecting the lubricating effect.

[0035] An oil outlet seat 25 is fixed to the inner wall of the oil outlet 28, and a first limiting chamber 26 is formed inside the oil outlet seat 25. A first guard plate 27 is rotatably connected to the inner wall of the first limiting chamber 26. The first guard plate 27 is arranged to be inclined in the direction away from the pressurizing chamber 22. When the lubricating oil inside the pressurizing chamber 22 is pushed by the rubber piston 23, the lubricating oil presses against the first guard plate 27, and the first guard plate 27 rotates in the direction away from the rubber piston 23. A gap is formed between the first guard plate 27 and the first limiting chamber 26 after the first guard plate 27 rotates, and the lubricating oil enters the inside of the oil outlet 28 through the gap and then enters the inside of the fixed ring 4, realizing the pressurized conveying operation of the lubricating oil. When the rubber piston 23 moves in the direction away from the fixed ring 4, the first guard plate 27 is sucked and pressed against the inner wall of the first limiting chamber 26, and the first guard plate 27 is in close fit with the first limiting chamber 26, avoiding the lubricating oil inside the oil outlet 28 from flowing back and entering the inside of the pressurizing chamber 22 again, realizing the anti-backflow operation.

[0036] The interior of the fixed ring 4 is provided with a conveying cavity. One end of the conveying cavity is docked with the oil outlet 28, and the other end of the conveying cavity is respectively docked with the input ports of the first lubricating channel 61, the second lubricating channel 62, and the third lubricating channel 63. The first lubricating channel 61 lubricates the first flat thrust roller bearing, the second lubricating channel 62 lubricates the second flat thrust roller bearing, and the third lubricating channel 63 enters the gap of the third bearing through the mounting table 11 to lubricate the third double-row cylindrical roller bearing. The lubricating medium is an oil-gas mixture, which lubricates the three groups of bearings, reduces the wear of the rolling elements and takes away the heat generated by rolling friction, improves the accuracy stability and the service life of the turntable. At the same time, oil drainage channels 64 are provided on the mounting table 11, the rotating shaft 12, and the upper rotating ring 13 to discharge the excess lubricating oil. Multiple oil drainage channels 64 can be arranged in the axial direction.

[0037] The oil storage assembly 3 includes an oil storage tank 31 fixed to the bottom of the pressurizing cylinder 21. The interior of the oil storage tank 31 is provided with an oil storage cavity 32. A fuel filling port 39 is arranged on the side of the oil storage tank 31. The lubricating oil is stored through the oil storage cavity 32, and the lubricating oil is concentrated at the bottom of the oil storage cavity 32, which is conducive to the extraction of the lubricating oil at the bottom of the oil storage cavity 32.

[0038] An oil inlet seat 33 is fixed to the bottom of the pressurizing cavity 22, and a second limiting cavity 34 is provided inside the oil inlet seat 33. A second guard plate 35 is rotatably connected to the inner wall of the second limiting cavity 34. The second guard plate 35 is arranged to be inclined towards the pressurizing cavity 22. When the rubber piston 23 moves away from the fixed ring 4, the air pressure inside the pressurizing cavity 22 is extracted, and the extraction force pulls the second guard plate 35. The second guard plate 35 rotates away from the oil storage tank 31. A gap is generated between the second guard plate 35 and the second limiting cavity 34 after the second guard plate 35 rotates, and the lubricating oil is extracted into the interior of the pressurizing cavity 22 through the gap, realizing the extraction and replenishment operation of the lubricating oil. When the rubber piston 23 moves towards the fixed ring 4, the second guard plate 35 is pushed to closely adhere to the inner wall of the second limiting cavity 34. The second guard plate 35 is in close fit with the second limiting cavity 34, avoiding the backflow of the lubricating oil inside the pressurizing cavity 22 and re-entering the interior of the oil storage cavity 32, realizing the anti-backflow operation.

[0039] An oil delivery pipe 36 cooperating with the oil inlet seat 33 is arranged inside the oil storage tank 31, and a suction block 37 is fixed to the bottom of the oil delivery pipe 36. The oil storage tanks 31 are connected through a connecting ring 38. The lubricating oil at the bottom of the oil storage cavity 32 is extracted through the suction block 37. The bottom of the suction block 37 directly contacts the bottom of the oil storage cavity 32, which is conducive to the suction block 37 extracting the lubricating oil inside the oil storage cavity 32.

[0040] A connecting frame 51 is fixed to the end face of the push plate 24. The bottom of the connecting frame 51 is rotatably connected to a pull plate 52 through a first movable shaft. The bottom of the pull plate 52 is rotatably connected to the side of a movable seat 53 through a second movable shaft. A screw rod 54 is threadedly connected inside the movable seat 53, and the bottom of the screw rod 54 is fixedly connected to the output shaft of a motor 55. The bottom of the motor 55 is fixed with a first bracket 56, and the top of the first bracket 56 is fixed to the surface of a connecting ring 38. When the rotating shaft 12 rotates at a high speed, the controller controls the motor 55 to work. The motor 55 drives the screw rod 54 to rotate slightly. When the screw rod 54 rotates, the movable seat 53 moves downward. The movable seat 53 pulls the connecting frame 51 to move through the pull plate 52. The connecting frame 51 moves in the direction close to the fixed ring 4. The connecting frame 51 pushes the rubber piston 23 to move through the push plate 24, so that the rubber piston 23 moves in the direction close to the fixed ring 4, realizing the pushing operation of the rubber piston 23. Through the pushing of the rubber piston 23, the lubricating oil inside the pressure chamber 22 is pushed into the inside of the oil outlet 28. When the pushing is completed, the controller controls the motor 55 to work again. The motor 55 drives the screw rod 54 to rotate in the reverse direction, so that the movable seat 53 moves upward. The movable seat 53 pushes the connecting frame 51 to move through the pull plate 52. The connecting frame 51 pulls the rubber piston 23 to move in the direction away from the fixed ring 4 through the push plate 24, realizing the reset of the rubber piston 23. Through the reset of the rubber piston 23, the lubricating oil inside the oil storage chamber 32 is extracted.

[0041] Embodiment 2

[0042] Please refer to Figure 10 , the top of the motor 55 is rotatably connected to the surface of a top plate 57. The outer wall of the top plate 57 is fixed to the inner wall of the first bracket 56 through a second bracket 58. A counter 71 is fixed to the top of the top plate 57. A pressing block 72 cooperating with the counter 71 is fixed to the outer wall of the rotating shaft 12. Both sides of the pressing block 72 are arc-shaped. When the pressing block 72 rotates with the rotating shaft 12, the pressing block 72 rotates one circle and presses the counter 71 once, realizing the counting operation of the number of rotation circles. According to the accumulation of the counted number of circles, subsequent oil change operations are carried out.

[0043] A collar 73 is fixed to the side of the moving seat 53, and a fixing plate 74 is fixed to one end of the collar 73 away from the moving seat 53. An electromagnet 75 is fixed to the top of the fixing plate 74. A rubber plug 77 is inserted into the bottom of the oil drain channel 64, and a metal sheet 76 that cooperates with the electromagnet 75 is fixed to the bottom of the rubber plug 77. A pressing switch 78 is fixed to one side of the bottom of the top plate 57 close to the collar 73. When the number of rotation reaches the cumulative amount and an oil change operation is required, the controller energizes the electromagnet 75. The electromagnet 75 generates magnetism when energized. The electromagnet 75 attracts the metal sheet 76, and the electromagnet 75 and the metal sheet 76 are tightly adsorbed. At the same time, the controller controls the motor 55 to work. The motor 55 drives the screw 54 to rotate rapidly, and the moving seat 53 descends rapidly, so that the rubber piston 23 pushes the lubricating oil inside the pressurizing chamber 22, so that the lubricating oil impacts into the inside of the lubricating flow channel one 61, the lubricating flow channel two 62 and the lubricating flow channel three 63, and pushes the waste oil inside the lubricating flow channel one 61, the lubricating flow channel two 62 and the lubricating flow channel three 63 to be discharged through the oil drain channel 64. When the moving seat 53 moves downward, the moving seat 53 drives the fixing plate 74 to move downward synchronously through the collar 73. The fixing plate 74 drives the electromagnet 75 and the metal sheet 76 to move downward synchronously. The metal sheet 76 drives the rubber plug 77 to move downward synchronously, realizing the extraction of the rubber plug 77, which is beneficial to the discharge of the waste oil inside the oil drain channel 64. After the waste oil is discharged, the motor 55 controls the screw 54 to reverse, so that the moving seat 53 moves upward. The moving seat 53 drives the collar 73 to move upward. The collar 73 indirectly drives the fixing plate 74, the electromagnet 75, the metal sheet 76 and the rubber plug 77 to move upward synchronously until the collar 73 presses the pressing switch 78. After the pressing switch 78 is pressed, the circuit of the electromagnet 75 is controlled to be disconnected, so that the adsorption state between the electromagnet 75 and the metal sheet 76 disappears, and the rubber plug 77 is plugged into the bottom of the oil drain channel 64 again, realizing the closing operation of the oil drain channel 64. Through the above design, a complete automatic waste oil discharge operation is realized.

[0044] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A machine tool turntable, comprising: Installation table (11), the center of the installation table (11) is rotatably connected to a rotating shaft (12) through a first bearing, the upper end of the rotating shaft (12) is fixed with an upper rotating ring (13), and the bottom of the upper rotating ring (13) is rotatably connected to the installation table (11) through a second bearing, the lower end of the rotating shaft (12) is fixed with a lower rotating ring (14), and the top of the lower rotating ring (14) is rotatably connected to the installation table (11) through a third bearing; It is characterized in that: it further includes: Lubrication flow channel one (61), the lubrication flow channel one (61) is opened inside the installation table (11), and the output port of the lubrication flow channel one (61) is connected to the first bearing. Lubrication flow channel two (62) and lubrication flow channel three (63) are opened inside the installation table (11), which respectively provide lubricating oil for the second bearing and the third bearing, lubricate the three groups of bearings, reduce the wear of the rolling elements and take away the heat generated by rolling friction. The installation table (11), the rotating shaft (12) and the upper rotating ring (13) are all provided with oil drainage channels (64).

2. The turntable of the machine tool according to claim 1, wherein: A fixing ring (4) is fixed on the outer wall of the installation table (11), and a pressurizing component (2) is fixed on the outer wall of the fixing ring (4). When the rotating shaft (12) rotates at a high speed and generates high temperature, the lubricating oil delivery pressure is increased through the pressurizing component (2) to maintain the lubrication effect. A storage oil component (3) is arranged at the bottom of the pressurizing component (2), and the storage oil component (3) provides reserve lubricating oil for the operation of the pressurizing component (2). The pressurizing component (2) includes a pressurizing cylinder (21) fixed on the outer wall of the fixing ring (4), and a pressurizing cavity (22) is opened inside the pressurizing cylinder (21). A rubber piston (23) is inserted into the inner wall of the pressurizing cavity (22), and a push plate (24) is fixed on the end face of the rubber piston (23). An oil outlet (28) is opened at one end of the pressurizing cylinder (21) away from the push plate (24).

3. The turntable of a machine tool according to claim 2, characterized in that: An oil outlet seat (25) is fixed on the inner wall of the oil outlet (28), and a limiting cavity one (26) is opened inside the oil outlet seat (25). A protection plate one (27) is rotatably connected to the inner wall of the limiting cavity one (26), and the protection plate one (27) is arranged to be inclined in the direction away from the pressurizing cavity (22).

4. The turntable of the machine tool according to claim 2, characterized in that: A delivery cavity is opened inside the fixing ring (4), one end of the delivery cavity is butted against the oil outlet (28), and the other end of the delivery cavity is respectively butted against the input ports of the lubrication flow channel one (61), the lubrication flow channel two (62) and the lubrication flow channel three (63).

5. The turntable of a machine tool according to claim 2, characterized in that: The storage oil component (3) includes a storage oil tank (31) fixed at the bottom of the pressurizing cylinder (21), a storage oil cavity (32) is opened inside the storage oil tank (31), and an oil filling port (39) is arranged on the side of the storage oil tank (31).

6. The machine tool turntable according to claim 2, wherein: An oil inlet seat (33) is fixed at the bottom of the pressurizing cavity (22), and a limiting cavity two (34) is opened inside the oil inlet seat (33). A protection plate two (35) is rotatably connected to the inner wall of the limiting cavity two (34), and the protection plate two (35) is arranged to be inclined in the direction close to the pressurizing cavity (22).

7. The turntable of a machine tool according to claim 5, characterized in that: Inside the fuel storage tank (31), there is an oil delivery pipe (36) that cooperates with the oil inlet seat (33), and a suction block (37) is fixed to the bottom of the oil delivery pipe (36). The fuel storage tanks (31) are connected by a connecting ring (38).

8. The turntable of the machine tool according to claim 7, characterized in that: A connecting frame (51) is fixed to the end face of the push plate (24). The bottom of the connecting frame (51) is rotatably connected to a pull plate (52) through a first movable shaft. The bottom of the pull plate (52) is rotatably connected to the side of a moving seat (53) through a second movable shaft. A screw rod (54) is threadedly connected inside the moving seat (53), and the bottom of the screw rod (54) is fixedly connected to the output shaft of a motor (55). The bottom of the motor (55) is fixed with a first bracket (56), and the top of the first bracket (56) is fixed to the surface of the connecting ring (38).

9. The turntable of the machine tool according to claim 8, wherein: The top of the motor (55) is rotatably connected to the surface of a top plate (57). The outer wall of the top plate (57) is fixed to the inner wall of the first bracket (56) through a second bracket (58). A counter (71) is fixed to the top of the top plate (57). A pressing block (72) that cooperates with the counter (71) is fixed to the outer wall of the rotating shaft (12). Both sides of the pressing block (72) are arc-shaped.

10. The turntable of the machine tool according to claim 9, wherein: A collar (73) is fixed to the side of the moving seat (53). One end of the collar (73) away from the moving seat (53) is fixed with a fixing plate (74), and an electromagnet (75) is fixed to the top of the fixing plate (74). A rubber plug (77) is inserted into the bottom of the oil discharge channel (64), and a metal sheet (76) that cooperates with the electromagnet (75) is fixed to the bottom of the rubber plug (77). A pressing switch (78) is fixed to the bottom of the top plate (57) near the collar (73).

Images