A rotary table for machine tools

Abstract

This invention provides a rotary table for machine tools, including a housing, a spindle driven by a drive mechanism, and a top worktable surface. It also includes a partition plate installed between the housing and the spindle, and a gear ring locking mechanism above the partition plate. The gear ring locking mechanism includes an internal gear ring, a fixed ring, and a locking ring. The internal gear ring is fixedly sleeved on the outside of the spindle, and the fixed ring is sleeved on the outside of the internal gear ring. A first locking portion and a second locking portion are fixedly connected at the sleeve joint of the internal gear ring and the fixed ring, respectively. The locking ring is sleeved on the outside of the spindle and located below the internal gear ring and the fixed ring. A locking cylinder is provided between the fixed ring and the locking ring, and a pressing block is installed between the internal gear ring and the locking ring. A lifting cylinder is provided between the locking ring and the partition plate. Thus, the device precisely controls the worktable surface to reach a specified angle through the gear ring locking mechanism, thereby completing the rotation and reaching a specified stop angle.

Description

Technical Field

[0001] This invention relates to the field of machining equipment and provides a rotary table for machine tools. Background Technology

[0002] A rotary worktable is a type of worktable installed on a rotary multi-station machine tool to enable the completion of multiple processing steps of a part in one operation.

[0003] The rotary worktables commonly used in the machining industry typically fall into the following categories: one is driven by a motor to rotate the camshaft, which in turn drives the pins evenly distributed under the worktable to rotate the worktable. Once in position, a switch is activated, and the worktable is then positioned by a pin or a gear plate. The other is rotated by a rotary cylinder. Once in position, a switch is activated, and the worktable is then positioned by a pin or a gear plate.

[0004] The aforementioned rotary tables all use a rotary drive device to achieve the table's indexing movement and pins or gears to position the table. Their complex combination of mechanical parts and numerous mechanical transmission structures lead to systematic errors, making it difficult for existing large rotary tables to accurately complete the positioning and stopping at a specified angle. Summary of the Invention

[0005] To address the aforementioned deficiencies, the present invention aims to provide a rotary worktable for machine tools, which is intended to solve the problems mentioned in the background art. The device includes a housing, with an upper end cover and a lower end cover respectively installed on the upper and lower parts of the housing. A rotatable spindle is installed inside the housing, and a worktable surface is fixedly installed on the top of the spindle. A drive mechanism is provided between the housing and the spindle. The device is characterized by further including a partition and a gear ring locking mechanism.

[0006] The partition is installed between the housing and the main shaft and is fixedly connected to the housing; the gear ring locking mechanism is located above the partition and includes an internal gear ring, a fixing ring and a locking ring;

[0007] The internal gear ring is fitted around the outside of the main shaft and is fixedly connected to the main shaft. The fixed ring is fitted around the outside of the internal gear ring. The fitting joints of the internal gear ring and the fixed ring are respectively fixedly connected with a first snap-fit ​​part and a second snap-fit ​​part. The locking ring is fitted around the outside of the main shaft and is located below the internal gear ring and the fixed ring. A locking cylinder is provided between the fixed ring and the locking ring. A pressing block is installed between the internal gear ring and the locking ring. A lifting cylinder is provided between the locking ring and the partition plate.

[0008] Furthermore, both the first and second snap-fit ​​portions are fitted with a removable anti-slip and wear-resistant layer.

[0009] Furthermore, the bottom of the clamping block is fixedly connected to the top of the locking ring, and the clamping block is a wear-resistant and anti-slip block.

[0010] Furthermore, the drive mechanism includes a bearing housing, a worm gear assembly, a worm, and a motor. The worm gear assembly is sleeved on the outside of the main shaft and meshes with the worm. The bearing housing is installed inside the housing. One end of the worm is rotatably installed inside the bearing housing, and the other end of the worm is fixedly connected to the output shaft of the motor.

[0011] Furthermore, the worm gear assembly includes a ring tooth and a worm gear inner sleeve. The worm gear inner sleeve is fitted onto the main shaft and is fixedly connected to the main shaft. The ring tooth is installed on the worm gear inner sleeve and meshes with the worm.

[0012] Furthermore, an inner sleeve is provided between the partition and the main shaft, and the locking ring is fitted onto the main shaft through the inner sleeve.

[0013] Furthermore, a sealing ring layer is provided at the joint between the inner sleeve and the main shaft.

[0014] Furthermore, a support mechanism is installed at the bottom of the main shaft, and the support mechanism is fixedly connected to the top of the lower end cover.

[0015] Furthermore, the worktable also includes a positioning mechanism, which includes a detection mechanism installed inside the housing and a ruler on the outer periphery of the spindle, with the detection mechanism and the ruler corresponding to each other.

[0016] In summary, during actual use, the locking ring inside the device can move up and down under the drive of the lifting cylinder, and the fixed ring can also move up and down under the drive of the locking cylinder. When the worktable needs to perform a rotation, the drive mechanism can drive the spindle to rotate, and the spindle drives the worktable surface and the internal gear ring fixedly connected to it to rotate. During the rotation, both the lifting cylinder and the locking cylinder are in a retracted state. At this time, the clamping block on the locking ring and the second locking part on the fixed ring do not abut against the internal gear ring. When the worktable needs to stop rotating and needs to be rotated to a designated position, the control system inside the worktable sends a signal. At this time, the power equipment in the drive mechanism is shut down, and the lifting cylinder lifts the locking ring, causing the clamping block on the locking ring to contact the internal gear ring, rapidly decelerating the internal gear ring. Due to the pressure of the clamping block on the internal gear ring and the pressure of the worktable surface... The deceleration exhibits a linear relationship. The system automatically detects and controls the pressure provided by the lifting cylinder, enabling preliminary and precise control of the relative angle between the worktable and the housing when the rotation stops. As the rotation is about to stop, the locking cylinder intervenes, lifting the fixed ring. At this point, the second locking part on the fixed ring quickly contacts the first locking part, thus stopping the rotation of the worktable and precisely reaching the specified angle, thereby completing the rotation and reaching the specified stopping angle. During this process, the detection mechanism monitors the rotation angle of the worktable in real time, and the control within the device automatically controls each aspect of the movement, thereby achieving precise control.

[0017] Therefore, the device can precisely control the worktable surface to reach a specified angle through the gear ring locking mechanism, thereby completing the rotation and reaching the specified stop angle. Attached Figure Description

[0018] Figure 1 This is a sectional view of the internal structure of the workbench;

[0019] Figure 2 This is a sectional view of the internal structure of the drive mechanism;

[0020] Figure 3 for Figure 1 Enlarged view of the A-section structure;

[0021] Figure 4 for Figure 3 Enlarged view of the structure of section B;

[0022] In the diagram: 1-House; 10-Inner sleeve; 11-Baffle; 111-Lifting cylinder; 12-Supporting mechanism; 13-Turbine inner sleeve; 14-Gear ring; 141-Detection mechanism; 142-Ring; 16-Lower end cover; 18-Bearing seat; 19-Locking nut; 2-Main shaft; 21-Worm gear; 23-Motor; 24-Magnetic coupling; 3-Fixing ring; 31-Second snap-fit ​​part; 41-Locking cylinder; 5-Upper end cover; 7-Internal gear ring; 71-First snap-fit ​​part; 8-Locking ring; 811-Pressure block; 9-Worktable. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0024] See Figure 1-4 The purpose of this invention is to provide a rotary table for a machine tool, comprising a housing 1, wherein an upper end cover 5 and a lower end cover 16 are respectively installed on the upper and lower parts of the housing 1, and a rotatable spindle 2 is installed inside the housing 1. The housing 1 serves as a support mechanism for the outside of the worktable, providing support and fixing. The upper end cover 5 and the lower end cover 16 seal the housing 1 and the spindle 2, forming an internally sealed structure. A worktable surface 9 is fixedly installed on the top of the spindle 2. A drive mechanism is provided between the housing 1 and the spindle 2, which provides power to drive the spindle 2 to rotate. The spindle 2 drives the worktable surface 9, which is fixedly connected to it, to rotate. The invention is characterized by further including a partition plate 11 and a gear ring locking mechanism.

[0025] The partition 11 is installed between the housing 1 and the main shaft 2 and is fixedly connected to the housing 1; the gear ring locking mechanism is located above the partition 11, and the gear ring locking mechanism includes an internal gear ring 7, a fixing ring 3 and a locking ring 8.

[0026] The internal gear ring 7 is fitted around the outside of the main shaft 2 and is fixedly connected to the main shaft 2. The fixing ring 3 is fitted around the outside of the internal gear ring 7. The fitting joints of the internal gear ring 7 and the fixing ring 3 are respectively fixedly connected with a first snap-fit ​​part 71 and a second snap-fit ​​part 31. The locking ring 8 is fitted around the outside of the main shaft 2 and is located below the internal gear ring 7 and the fixing ring 3. A locking cylinder 41 is provided between the fixing ring 3 and the locking ring 8. A pressing block 811 is installed between the internal gear ring 7 and the locking ring 8. A lifting cylinder 111 is provided between the locking ring 8 and the partition plate 11.

[0027] The locking ring 8 of this combination structure can move up and down under the drive of the lifting cylinder 111, and the fixing ring 3 can move up and down under the drive of the locking cylinder 41.

[0028] When the worktable needs to perform a rotation action, the drive mechanism can drive the spindle 2 to rotate. The spindle 2 drives the worktable surface 9 and the internal gear ring 7, which are fixedly connected to it, to rotate. During the rotation, the lifting cylinder 111 and the locking cylinder 41 are both in the retracted state. At this time, the pressing block 811 on the locking ring 8 and the second snap-fit ​​part 31 on the fixed ring 3 do not collide with the internal gear ring 7.

[0029] When the worktable needs to stop rotating and needs to be rotated to a designated position, the control system sends a signal. At this time, the power equipment in the drive mechanism is shut off, and the lifting cylinder 111 lifts the locking ring 8, so that the clamping block 811 on the locking ring 8 contacts the internal gear ring 7, which rapidly decelerates the internal gear ring 7. Since the pressure of the clamping block 811 on the internal gear ring 7 is linearly related to the deceleration of the worktable surface 9, the system automatically detects and controls the pressure value provided by the lifting cylinder 111, which can initially and accurately control the relative angle between the worktable surface 9 and the housing 1 when it stops rotating. When it is about to reach the rotation stop point, the locking cylinder 41 intervenes and lifts the fixed ring 3. At this time, the second locking part 31 on the fixed ring 3 quickly contacts the first locking part 71, so that the worktable surface 9 stops rotating and accurately reaches the designated angle, thus completing the rotation and reaching the designated stop angle.

[0030] Preferably, the contact portions of the first latching part 71 and the second latching part 31 are both equipped with a removable anti-slip and wear-resistant layer. The first latching part 71 and the second latching part 31 experience some wear during use, and the anti-slip and wear-resistant layer can be connected to the first latching part 71 and the second latching part 31 by bolts, facilitating replacement during equipment maintenance.

[0031] Preferably, the bottom of the clamping block 811 is fixedly connected to the top of the locking ring 8. The clamping block 811 is a wear-resistant anti-slip block and has a certain hardness so that the control system can accurately control the pressure and the deceleration of the worktable 9. The part of the top of the clamping block 811 that contacts the internal gear ring 7 is provided with an anti-slip and wear-resistant ring layer.

[0032] Preferably, the drive mechanism includes a bearing housing 18, a worm gear assembly, a worm 21, a magnetic coupling 24, and a motor 23. The worm gear assembly is sleeved on the outside of the main shaft 2 and meshes with the worm 21. The worm 21 can transmit its rotational force to the main shaft 2 through the worm gear assembly, causing the main shaft 2 to rotate. The bearing housing 18 is installed inside the housing 1. One end of the worm 21 is rotatably installed in the bearing housing 18, and the other end of the worm 21 is connected to the output shaft of the motor 23 through the magnetic coupling 24. The motor 23 drives the worm 21 to rotate, and the bearing housing 18 serves to limit the movement of the worm 21.

[0033] Preferably, the worm gear assembly includes a ring tooth 14 and a worm gear inner sleeve 13. The worm gear inner sleeve 13 is fitted onto the main shaft 2 and is fixedly connected to the main shaft 2. The ring tooth 14 is installed on the worm gear inner sleeve 13 and meshes with the worm 21.

[0034] Preferably, an inner sleeve 10 is provided between the partition 11 and the main shaft 2, and the locking ring 8 is fitted onto the main shaft 2 through the inner sleeve 10; the inner sleeve 10 can assist the partition 11 in isolating the upper and lower ends of the partition 11.

[0035] Preferably, a sealing ring is provided at the connection between the inner sleeve 10 and the main shaft 2; the sealing ring can prevent lubricating oil from entering the gear ring locking mechanism on the upper layer of the partition 11.

[0036] Preferably, a support mechanism 12 is installed at the bottom of the spindle 2. The support mechanism 12 is fixedly connected to the top of the lower end cover 16. The support mechanism 12 contains a bearing connected to the spindle 2. The support mechanism 12 is used to support the spindle 2, and the spindle 2 can rotate on the top of the support mechanism 12.

[0037] Preferably, the worktable further includes a positioning mechanism, which includes a detection mechanism 141 installed inside the housing 1 and a ruler 142 on the outer periphery of the spindle 2. The detection mechanism 141 and the ruler 142 are correspondingly arranged. The detection mechanism 141 can be a photoelectric detection probe, and the ruler 142 can be a grating scale ring. The rotation angle of the worktable surface 9 is detected by photoelectric sensing.

[0038] In summary, during actual use, the locking ring 8 inside the device can move up and down under the drive of the lifting cylinder 111, and the fixing ring 3 can move up and down under the drive of the locking cylinder 41. When the worktable needs to perform a rotation, the drive mechanism can drive the spindle 2 to rotate, and the spindle 2 drives the worktable surface 9 and the internal gear ring 7 fixedly connected to it to rotate. During the rotation, both the lifting cylinder 111 and the locking cylinder 41 are in a retracted state. At this time, the clamping block 811 on the locking ring 8 and the second snap-fit ​​part 31 on the fixing ring 3 do not abut against the internal gear ring 7. When the worktable needs to stop rotating and needs to be rotated to a designated position, the control system inside the worktable sends a signal. At this time, the power equipment in the drive mechanism is turned off, and the lifting cylinder 111 lifts the locking ring 8, so that the clamping block 811 on the locking ring 8 contacts the internal gear ring 7, rapidly decelerating the internal gear ring 7. Due to the pressure of the clamping block 811 on the internal gear ring 7... The deceleration of the worktable 9 is linearly related to the pressure value provided by the lifting cylinder 111. The system can automatically detect and control the pressure value provided by the lifting cylinder 111 to achieve preliminary and accurate control of the relative angle between the worktable 9 and the housing 1 when it stops rotating. When it is about to reach the rotation stop point, the locking cylinder 41 intervenes and lifts the fixing ring 3. At this time, the second locking part 31 on the fixing ring 3 quickly contacts the first locking part 71, so that the worktable 9 stops rotating and accurately reaches the specified angle, thus completing the rotation and reaching the specified stop angle. During this process, the detection mechanism 141 detects the rotation angle of the worktable 9 in real time. The control in the device automatically controls each link of the movement, thereby achieving the purpose of precise control.

[0039] Therefore, the device can precisely control the worktable surface 9 of the worktable to reach a specified angle through the gear ring locking mechanism, thereby completing the rotation and reaching the specified stop angle.

[0040] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. A rotary table for a machine tool, comprising a housing (1), wherein an upper end cover (5) and a lower end cover (16) are respectively installed on the upper and lower parts of the housing (1), a rotatable spindle (2) is installed inside the housing (1), a worktable surface (9) is fixedly installed on the top of the spindle (2), and a drive mechanism is provided between the housing (1) and the spindle (2), characterized in that, It also includes a partition (11) and a gear ring locking mechanism; The partition (11) is installed between the housing (1) and the main shaft (2) and is fixedly connected to the housing (1); the gear ring locking mechanism is located above the partition (11), and the gear ring locking mechanism includes an internal gear ring (7), a fixing ring (3) and a locking ring (8). The internal gear ring (7) is fitted on the outside of the main shaft (2) and is fixedly connected to the main shaft (2). The fixed ring (3) is fitted on the outside of the internal gear ring (7). The fitting parts of the internal gear ring (7) and the fixed ring (3) are respectively fixedly connected to a first snap-fit ​​part (71) and a second snap-fit ​​part (31). The locking ring (8) is fitted on the outside of the main shaft (2) and is located below the internal gear ring (7) and the fixed ring (3). A locking cylinder (41) is provided between the fixed ring (3) and the locking ring (8). A pressing block (811) is installed between the internal gear ring (7) and the locking ring (8). A lifting cylinder (111) is provided between the locking ring (8) and the partition plate (11). When the worktable needs to stop rotating and rotate to a designated position, the lifting cylinder (111) lifts the locking ring (8), so that the clamping block (811) on the locking ring (8) contacts the internal gear ring (7), and the internal gear ring (7) is decelerated quickly. When it is about to reach the rotation stop point, the second locking part (31) on the fixed ring (3) quickly contacts the first locking part (71), so that the worktable surface (9) stops rotating.

2. The rotary table for machine tools according to claim 1, characterized in that, The contact portions of the first snap-fit ​​part (71) and the second snap-fit ​​part (31) are both equipped with a removable anti-slip and wear-resistant layer.

3. The rotary table for machine tools according to claim 1, characterized in that, The bottom of the clamping block (811) is fixedly connected to the top of the locking ring (8), and the clamping block (811) is a wear-resistant anti-slip block.

4. The rotary table for machine tools according to claim 1, characterized in that, The drive mechanism includes a bearing housing (18), a worm gear assembly, a worm (21), and a motor (23). The worm gear assembly is sleeved on the outside of the main shaft (2) and meshes with the worm (21). The bearing housing (18) is installed inside the housing (1). One end of the worm (21) is rotatably installed inside the bearing housing (18), and the other end of the worm (21) is fixedly connected to the output shaft of the motor (23).

5. The rotary table for machine tools according to claim 4, characterized in that, The worm gear assembly includes a ring tooth (14) and a worm gear inner sleeve (13). The worm gear inner sleeve (13) is fitted on the main shaft (2) and is fixedly connected to the main shaft (2). The ring tooth (14) is installed on the worm gear inner sleeve (13) and meshes with the worm (21).

6. The rotary table for machine tools according to claim 1, characterized in that, An inner sleeve (10) is provided between the partition (11) and the main shaft (2), and the locking ring (8) is fitted onto the main shaft (2) through the inner sleeve (10).

7. The rotary table for machine tools according to claim 6, characterized in that, A sealing ring is provided at the connection between the inner sleeve (10) and the main shaft (2).

8. The rotary table for machine tools according to claim 1, characterized in that, The main shaft (2) is equipped with a support mechanism (12) at the bottom, and the support mechanism (12) is fixedly connected to the top of the lower end cover (16).

9. The rotary table for machine tools according to claim 1, characterized in that, The worktable also includes a positioning mechanism, which includes a detection mechanism (141) installed inside the housing (1) and a ruler (142) on the outer periphery of the spindle (2). The detection mechanism (141) and the ruler (142) are arranged correspondingly.

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