A machine tool automatic indexing dual-auxiliary rotary support structure and its working method

Abstract

This invention relates to the field of machine tool accessories technology, and more particularly to an automatic indexing double-auxiliary rotary support structure for machine tools and its working method. The structure includes: a mounting base, fixedly mounted on the machine tool; a power shaft, disposed within the mounting base; a power unit driving the power shaft to rotate and slide axially; an indexing gear and a mating block disposed on the power shaft; an indexing gear plate, fixedly mounted within the mounting base; a support base, fixedly mounted on the mounting base; a connecting rotary base, rotatably mounted on the support base via two bearings and connected to the tool arm; a mating groove provided on the end face of the connecting rotary base, into which the mating block extends; a bushing disposed within the connecting rotary base and located between the two bearings; a spindle, one end fixed to the power shaft and the other end extending into the bushing; and a first spring, sleeved on the spindle and located between the power shaft and the bushing. This invention effectively improves the stability of the tool arm during rotation and fixation, and enhances the load-bearing capacity of the tool arm.

Description

Technical Field

[0001] This invention relates to the field of machine tool accessories technology, and in particular to an automatic indexing dual-auxiliary rotary support structure for machine tools and its working method. Background Technology

[0002] In the machining process of precision machine tools, it is often necessary to rotate and fix components such as parts and cutting tools at specific angles. Therefore, precision machine tools are usually equipped with indexing rotary structures to rotate components such as the tool arm or worktable to the required angle and fix them. Existing indexing rotary mechanisms are usually relatively simple and have poor support capacity. When the machine tool load is too large, excessive force is applied to the indexing rotary mechanism at one end. Due to its poor support capacity, the existing indexing rotary mechanism is prone to bending and deformation of its rotating shaft, which seriously affects the accuracy of the tool arm's stopping angle and the stability of rotation. Therefore, a more stable indexing rotary support structure that can handle large loads is needed. Summary of the Invention

[0003] This invention provides a machine tool automatic indexing dual-auxiliary rotary support structure and its working method, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] Mounting bracket, for fixed installation on the machine tool;

[0006] A drive shaft is installed inside the mounting base; a power unit drives the drive shaft to rotate and slide axially; an indexing gear and a mating block are installed on the drive shaft.

[0007] The indexing gear plate is fixedly installed in the mounting base;

[0008] Support base, fixedly installed on the mounting base;

[0009] The connecting rotary seat is rotatably mounted on the support seat via two bearings and is connected to the tool arm; the end face of the connecting rotary seat is provided with a mating groove, and the mating block extends into the mating groove;

[0010] The bushing is installed inside the connecting swivel and is located between the two bearings;

[0011] The spindle is fixed at one end to the drive shaft and extends into the bushing at the other end.

[0012] The first spring is fitted onto the spindle and is located between the power shaft and the bushing.

[0013] Furthermore, the power shaft is provided with an extension section extending toward the connecting pivot in the circumferential direction, and the inner wall of the extension section abuts against the outer wall of the connecting pivot.

[0014] Furthermore, the connecting pivot includes a base, a top seat, and a cover plate; the base and the cover plate are fixedly connected to each other, and the top seat is clamped by the base and the cover plate; a mating groove is provided on the top seat.

[0015] Furthermore, a mounting hole is provided on the inner side of the power shaft, and the end of the spindle extends into the mounting hole, so that the indexing gear is located between the two ends of the spindle.

[0016] Furthermore, damping plates and a first inclined surface structure are provided on the inner wall of the support base; it also includes:

[0017] The sliding sleeve slides on the connecting rotating base and rotates synchronously with the connecting rotating base; the outer surface of the sliding sleeve is provided with a second inclined surface structure;

[0018] The linkage mechanism is used for the linkage between the sliding sleeve and the mandrel; when the mandrel moves toward the cutter arm, it causes the sliding sleeve to move toward the damping plate; when the mandrel moves away from the cutter arm, it causes the sliding sleeve to move toward the first inclined surface structure.

[0019] Furthermore, the participating organizations include:

[0020] The oil chamber is located at the end of the spindle furthest from the power shaft.

[0021] A fixed sleeve is fixedly installed on the connecting rotary seat; the fixed sleeve has an inner cavity; the end of the sliding sleeve extends into the inner cavity;

[0022] The oil passage connects to the oil chamber and the inner chamber at both ends, respectively.

[0023] The second spring is sleeved on the connecting rotating seat, with one end abutting against the stepped surface of the connecting rotating seat and the other end abutting against the sliding sleeve.

[0024] Furthermore, the oil passage includes a first oil passage located on the fixed sleeve and a second oil passage located on the connecting rotary seat; the second oil passage is connected to the outer side of the connecting rotary seat and an annular groove is provided around the connecting rotary seat.

[0025] Furthermore, the inner cavity is arranged in a ring around the outer side of the rotating seat.

[0026] Furthermore, a rubber layer is provided on the damping sheet facing the end face of the sliding sleeve.

[0027] This invention also provides a working method for an automatic indexing dual-auxiliary rotary support structure for machine tools, using the aforementioned automatic indexing dual-auxiliary rotary support structure, the steps of which include:

[0028] When the cutter arm needs to rotate, the power unit first drives the power shaft to move toward the cutter arm, so that the indexing gear and the indexing gear plate are misaligned. Then the power unit drives the power shaft to rotate, thereby driving the cutter arm to rotate.

[0029] When it is necessary to fix the cutter arm, the power unit drives the power shaft away from the cutter arm, so that the indexing gear and the indexing disc are radially aligned, and the indexing gear and the indexing disc mesh with each other, thereby restricting the rotation of the cutter arm.

[0030] The technical solution of this invention can achieve the following technical effects:

[0031] This structure, through the cooperation of the power shaft, mandrel, and bushing, ensures that the mandrel connected to the power shaft will fit against the bushing in any state, and the bushing provides circumferential support to the mandrel. This ensures that the power shaft and the connecting rotary seat are always coaxial. Furthermore, when the connecting rotary seat is under stress, the bushing ensures that the two bearings are evenly stressed, thereby effectively reducing the possibility of torsional deformation of the connecting rotary seat and ensuring the stability of the tool arm during rotation and fixation. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a top view of the automatic indexing dual auxiliary rotary support structure for machine tools in this invention;

[0034] Figure 2 This is the first embodiment of the present invention. Figure 1 A cross-sectional view in the X direction;

[0035] Figure 3 for Figure 2 Enlarged view of point A;

[0036] Figure 4 In Embodiment 2 of the present invention, when the cutter arm is rotating... Figure 1 A cross-sectional view in the X direction;

[0037] Figure 5 for Figure 4 Enlarged view of point B;

[0038] Figure 6 for Figure 5 Enlarged view of point C;

[0039] Figure 7 In Embodiment 2 of the present invention, when the blade arm is in the fixed state... Figure 1 A cross-sectional view in the X direction;

[0040] Figure 8 for Figure 7 Enlarged view of point D;

[0041] Figure 9 for Figure 8 Enlarged view of point E.

[0042] Reference numerals in the attached drawings: 1. Cutting arm; 2. Mounting base; 3. Power shaft; 3a. Indexing gear; 3b. Mating block; 3c. Extension section; 4. Indexing gear plate; 5. Support base; 5a. Damping plate; 6. Connecting rotating base; 6a. Mating groove; 6b. Base; 6c. Top seat; 6d. Cover plate; 6e. Second oil passage; 6f. Annular groove; 7. Bushing; 8. Mandrel; 9. First spring; 10. Sliding sleeve; 11. Oil cavity; 12. Fixed sleeve; 12a. First oil passage; 13. Second spring. Detailed Implementation

[0043] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0045] This invention relates to a dual-auxiliary rotary support structure for automatic indexing of machine tools, such as... Figures 1-3 As shown, the specific structure includes:

[0046] Mounting base 2 serves as the outer casing of the entire structure and is fixedly mounted on the machine tool;

[0047] The power shaft 3 is installed in the mounting base 2; the power shaft 3 is connected to the power unit in the machine tool. The power unit is a composite mechanism of rotating and pushing / pulling devices. The rotating device in the power unit will drive the power shaft 3 to rotate, and the pushing / pulling device in the power unit will drive the power shaft 3 to slide axially; the power shaft 3 is provided with an indexing gear 3a and a mating block 3b.

[0048] The indexing gear plate 4 is fixedly installed in the mounting base 2;

[0049] Support base 5 is fixedly installed on mounting base 2;

[0050] The connecting rotary seat 6 is rotatably mounted on the support seat 5 via two bearings. The end of the connecting rotary seat 6 is connected to the outer shell of the tool arm 1 or directly integrated with the outer shell of the tool arm 1, so that the tool arm 1 of the machine tool can be rotated when the connecting rotary seat 6 rotates. The end face of the connecting rotary seat 6 is provided with a mating groove 6a, and the mating block 3b extends into the mating groove 6a. During operation, no matter where the power shaft 3 slides axially, a part of the mating block 3b is always located in the mating groove 6a, so that the power shaft 3 can drive the connecting rotary seat 6 to rotate when it rotates.

[0051] Bushing 7 is installed inside the connecting bearing 6 and located between the two bearings; bushing 7 is made of plastic material with self-lubricating properties such as POM and PP; the outer wall of bushing 7 is in close contact with the inner wall of connecting bearing 6.

[0052] The spindle 8 is fixed at one end to the power shaft 3, and the other end extends into the bushing 7 and extends to the other end of the bushing 7. During operation, no matter where the power shaft 3 slides axially, the entire bushing 7 is fitted on the spindle 8.

[0053] The first spring 9 is sleeved on the spindle 8 and located between the power shaft 3 and the bushing 7. The first spring 9 is always in a compressed state.

[0054] This rotary support structure has two main working states: the rotating state of the cutter arm 1 and the fixed state of the cutter arm 1. The two states are as follows:

[0055] When the tool arm 1 needs to rotate, the push-pull device in the power unit is used to push the power shaft 3 to move, so that the power shaft 3 is close to the tool arm 1. During the approach process, the indexing gear 3a and the indexing gear plate 4 will be displaced from each other. The indexing gear plate 4 can no longer restrict the rotation of the indexing gear 3a, thereby releasing the rotation restriction of the power shaft 3, the connecting rotary seat 6 and the tool arm 1. At this time, the rotation device in the power unit can drive the power shaft 3, the connecting rotary seat 6 and the tool arm 1 to rotate.

[0056] When the cutter arm 1 needs to be fixed, the power shaft 3 can be moved by the push-pull device in the power unit, so that the power shaft 3 is away from the cutter arm 1. The indexing gear 3a and the indexing gear plate 4 are aligned with each other. The teeth of the indexing gear 3a will be engaged between the two teeth of the indexing gear plate 4, thereby restricting the rotation of the power shaft 3, and thus restricting the rotation of the connecting rotary seat 6 and the cutter arm 1.

[0057] In any state, the spindle 8 connected to the power shaft 3 will fit against the bushing 7. The bushing 7 provides circumferential support to the spindle 8, thus ensuring that the power shaft 3 and the connecting rotary seat 6 are always coaxial. Even if the connecting rotary seat 6 is temporarily offset due to the excessive weight of the tool arm 1 or a large load, the bushing 7 and the spindle 8 will still keep the power shaft 3 and the connecting rotary seat 6 coaxial. Furthermore, due to the connection between the power shaft 3 and the power unit, the spindle 8 can also pull the bushing 7, thereby quickly returning the connecting rotary seat 6 to its original position.

[0058] In addition, the connecting bearing 6 itself has strong anti-torsion capability. With the bushing 7 placed between the two bearings, when the connecting bearing 6 is affected by the cutter arm 1, the force exerted by the cutter arm 1 on one end of the connecting bearing 6 will cause the connecting bearing 6 to twist, thereby causing the bushing 7 to be stressed. Then, the bushing 7 will make the two bearings evenly stressed through the connecting bearing 6, thereby further reducing the possibility of torsional deformation of the connecting bearing 6.

[0059] When the support structure loses power, the first spring 9 will continue to push the power shaft 3 away from the tool arm 1, so that the indexing gear 3a and the indexing gear plate 4 remain in a meshed state, restricting the rotation of the tool arm 1, thereby ensuring the safety of the machine tool in this state.

[0060] Preferably, an extension section 3c extending toward the connecting rotary seat 6 is provided circumferentially on the power shaft 3, so that the extension section 3c is in an annular shape and the inner wall of the extension section 3c abuts against the outer wall of the connecting rotary seat 6, thereby providing support for the outer side of the connecting rotary seat 6 by the power shaft 3, further ensuring the coaxiality of the power shaft 3 and the connecting rotary seat 6.

[0061] To prevent excessive load on the cutter arm 1 (such as impact) from damaging the teeth of the indexing gear 3a and indexing disc 4, which are difficult to machine in this structure, it is preferable to make special settings for the connecting rotary seat 6, such as... Figure 3 As shown:

[0062] The connecting pivot 6 is configured as a split structure, including a base 6b, a top seat 6c, and a cover plate 6d. A stepped surface is provided on the base 6b. The base 6b and the cover plate 6d are fixedly connected to each other by screws. After connection, the outer edge of the cover plate 6d protrudes from the end face of the base 6b, forming a clamping space between the protruding edge of the cover plate 6d and the stepped surface on the base 6b. The top seat 6c is fitted onto the base 6b and clamped by the clamping space formed by the base 6b and the cover plate 6d. A mating groove 6a is provided on the top seat 6c.

[0063] The principle of the above structure is as follows:

[0064] The force transmission between the top seat 6c and the base 6b mainly occurs through the friction between the protruding edge of the cover plate 6d, the stepped surface on the base 6b, and the top seat 6c. Since the mating groove 6a is located on the top seat 6c, the top seat 6c and the power shaft 3 rotate synchronously. When the cutter arm 1 is fixed, if the cutter arm 1 tends to rotate, the rotation of the power shaft 3 is restricted by the indexing gear 4. If the cutter arm 1 is in normal working condition, the force it experiences cannot overcome the aforementioned friction, so the top seat 6c and the base 6b will remain fixed to each other, thus restricting the rotation of the cutter arm 1. However, if the load on the cutter arm 1 is too large and exceeds the normal range, causing the force exerted by the cutter arm 1 on the base 6b to exceed the bearing capacity of the aforementioned friction, then the top seat 6c and the base 6b will rotate relative to each other until the load on the cutter arm 1 returns to the normal level. This prevents the excessive load force from being transmitted to the indexing gear 3a of the power shaft 3 through the top seat 6c, effectively protecting the gear.

[0065] Preferably, a mounting hole is provided inside the power shaft 3. When the spindle 8 is installed, its end extends into the mounting hole, so that the indexing gear 3a is located between the two ends of the spindle 8. In this way, when the spindle 8 transmits the force from one end of the cutter arm 1, it can pass over the indexing gear 3a, avoiding the force being dispersed on the teeth of the indexing gear 3a, and further protecting the gear.

[0066] The aforementioned support structure works well in machine tools with relatively low loads. However, as the load increases, it becomes necessary to add further support components to the structure, such as... Figures 4-9 As shown, it specifically includes:

[0067] A damping plate 5a and a first inclined surface structure are provided on the inner wall of the support base 5;

[0068] It also includes a sliding sleeve 10, which is disposed on the connecting rotating base 6; the sliding sleeve 10 and the connecting rotating base 6 are directly connected by a key or other connection method, so that the sliding sleeve 10 can slide on the connecting rotating base 6 and can rotate synchronously with the connecting rotating base 6; the outer surface of the sliding sleeve 10 is provided with a second inclined surface structure.

[0069] The linkage mechanism is used for the linkage between the sliding sleeve 10 and the spindle 8. When the spindle 8 moves toward the cutter arm 1, it causes the sliding sleeve 10 to move toward the damping plate 5a, and finally makes the sliding sleeve 10 and the damping plate 5a fit together. When the spindle 8 moves away from the cutter arm 1, it causes the sliding sleeve 10 to move toward the first inclined structure, and finally makes the first inclined structure and the second inclined structure fit together.

[0070] The specific principle of the above structure is as follows:

[0071] When the cutter arm 1 is rotating, due to its heavy load, if the power equipment suddenly stops while driving the cutter arm 1 to rotate, and if the cutter arm 1 happens to be in an upward position, it will rapidly fall under the influence of gravity, posing a significant safety hazard and potentially causing impact between the indexing gear 3a and the indexing gear plate 4. Therefore, this structure incorporates a sliding sleeve 10 and a linkage mechanism to prevent this during the rotation of the cutter arm 1. Figure 6 As shown, the spindle 8 is located closest to the cutter arm 1. At this time, the sliding sleeve 10 and the damping plate 5a are in contact with each other, so that the damping plate 5a restricts the excessive rotation of the sliding sleeve 10, thereby restricting the excessive rotation of the connecting rotating seat 6 and the cutter arm 1, and realizing the protection of the structural components.

[0072] With the blade arm 1 fixed, as follows Figure 9 As shown, the mandrel 8 is located at the position furthest from the cutter arm 1. At this time, the second inclined structure of the sliding sleeve 10 is in close contact with the first inclined structure of the support seat 5, thus forming a support between the connecting rotary seat 6 and the support seat 5. In this way, when the cutter arm 1 is under a large load and the force generated acts on the connecting rotary seat 6, the sliding sleeve 10 can transfer the force to the support seat 5. Furthermore, the inclined structure of the support surface only generates a small component force in the axial direction, making it difficult to push the sliding sleeve 10, thus forming a solid support structure. When rotation is required, the linkage mechanism will drive the sliding sleeve 10 to actively disengage, separating the second inclined structure from the first inclined structure, as shown... Figure 6 As shown, this avoids affecting the rotation of the connecting rotator 6.

[0073] The linkage mechanism can be implemented using various existing technologies such as linkages and electronic control. To minimize the complexity of control, this structure provides the following preferred simplified structure, including:

[0074] The oil chamber 11 is located at the end of the spindle 8 away from the power shaft 3. When the spindle 8 is close to the cutter arm 1, the space of the oil chamber 11 is compressed and the oil is squeezed outward. When the spindle 8 is away from the cutter arm 1, the space of the oil chamber 11 is enlarged and oil is drawn in from the outside.

[0075] The fixed sleeve 12 is fixedly installed on the connecting rotary seat 6; the fixed sleeve 12 has an inner cavity; the end of the sliding sleeve 10 extends into the inner cavity;

[0076] The oil passage is connected at both ends to the oil chamber 11 and the inner cavity, respectively;

[0077] The second spring 13 is sleeved on the connecting pivot 6, with one end abutting against the stepped surface of the connecting pivot 6 and the other end abutting against the sliding sleeve 10.

[0078] When switching to the rotating state of the cutter arm 1, the spindle 8 moves closer to the cutter arm 1 along with the power shaft 3, causing the oil in the oil chamber 11 to enter the inner cavity through the oil passage, thereby pushing the sliding sleeve 10 towards the damping plate 5a. When switching to the fixed state of the cutter arm 1, the spindle 8 moves away from the cutter arm 1 along with the power shaft 3, causing the oil in the inner cavity to return to the oil chamber 11 through the oil passage, and the second spring 13 will push the sliding sleeve 10 towards the first inclined structure.

[0079] The oil passage can be implemented by installing an additional oil pipe or by directly opening it on the existing components, including a first oil passage 12a located on the fixed sleeve 12 and a second oil passage 6e located on the connecting rotary seat 6; the second oil passage 6e is provided with an annular groove 6f around the connecting rotary seat 6 at one end connected to the outside of the connecting rotary seat 6. The annular groove 6f is used to eliminate the form and position error between the first oil passage 12a and the second oil passage 6e, ensure the connection between the first oil passage 12a and the second oil passage 6e, and make it possible for the first oil passage 12a and the second oil passage 6e not to be radially aligned, and even if there is a certain included angle, they can still be connected to each other through the annular groove 6f.

[0080] Preferably, the inner cavity is arranged in a ring shape around the outer side of the rotating seat 6. This ensures that the entire end face of the sliding sleeve 10 is evenly stressed when the oil pushes it, thus guaranteeing even stress distribution when it contacts the damping plate 5a and ensuring the stability of the sliding sleeve 10's rotation after contact. Preferably, a rubber patch is provided on the end face of the damping plate 5a facing the sliding sleeve 10. The rubber patch is adhered to the damping plate 5a, allowing for easy replacement after wear.

[0081] This invention also relates to a working method of a machine tool automatic indexing double auxiliary rotary support structure, using the above-described machine tool automatic indexing double auxiliary rotary support structure, the steps of which include:

[0082] When the tool arm 1 needs to rotate, the power unit first drives the power shaft 3 to move toward the tool arm 1, so that the indexing gear 3a and the indexing plate 4 are misaligned. A detection device can be installed to ensure that the indexing gear 3a and the indexing plate 4 are completely misaligned. Only then can the power unit be controlled to drive the power shaft 3 to rotate, thereby driving the tool arm 1 to rotate.

[0083] When it is necessary to fix the cutter arm 1, first check whether the teeth of the indexing gear 3a are aligned with the two teeth of the indexing gear plate 4. Only after ensuring alignment can the power device be controlled to drive the power shaft 3 away from the cutter arm 1, so that the indexing gear 3a and the indexing gear plate 4 are radially aligned and meshed with each other, thereby restricting the rotation of the cutter arm 1.

[0084] Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of this application. Accordingly, this specification and drawings are merely exemplary illustrations of the application as defined herein, and are to be considered as covering any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from its scope. Thus, if such modifications and modifications fall within the scope of this application and its equivalents, this application intends to include such modifications and modifications.

Claims

1. A machine tool automatic indexing dual-auxiliary rotary support structure, characterized in that, include: Mounting base (2) is fixedly installed on the machine tool; The power shaft (3) is disposed within the mounting base (2); The power unit drives the power shaft (3) to rotate and slide along the axial direction; the power shaft (3) is provided with an indexing gear (3a) and a mating block (3b); The indexing gear plate (4) is fixedly installed in the mounting base (2); The support base (5) is fixedly installed on the mounting base (2); A connecting rotary seat (6) is rotatably mounted on the support seat (5) via two bearings and connected to the cutter arm (1); the end face of the connecting rotary seat (6) is provided with a mating groove (6a), and the mating block (3b) extends into the mating groove (6a); A bushing (7) is disposed within the connecting pivot (6) and located between the two bearings; The spindle (8) has one end fixed on the power shaft (3) and the other end extended into the bushing (7); The first spring (9) is sleeved on the spindle (8) and located between the power shaft (3) and the bushing (7); The connecting pivot (6) includes a base (6b), a top seat (6c), and a cover plate (6d); the base (6b) and the cover plate (6d) are fixedly connected to each other, and the top seat (6c) is clamped by the base (6b) and the cover plate (6d); the mating groove (6a) is provided on the top seat (6c); The inner wall of the support base (5) is provided with a damping plate (5a) and a first inclined surface structure; it also includes: The sliding sleeve (10) slides on the connecting rotating seat (6) and rotates synchronously with the connecting rotating seat (6); the outer side of the sliding sleeve (10) is provided with a second inclined surface structure; A linkage mechanism is used for the linkage between the sliding sleeve (10) and the spindle (8); when the spindle (8) moves toward the cutter arm (1), the sliding sleeve (10) moves toward the damping plate (5a); when the spindle (8) moves away from the cutter arm (1), the sliding sleeve (10) moves toward the first inclined structure. The linkage mechanism includes: An oil cavity (11) is located at one end of the spindle (8) away from the power shaft (3); A fixed sleeve (12) is fixedly installed on the connecting rotating base (6); the fixed sleeve (12) has an inner cavity; the end of the sliding sleeve (10) extends into the inner cavity; The oil passage is connected at both ends to the oil cavity (11) and the inner cavity, respectively; The second spring (13) is sleeved on the connecting rotating seat (6), with one end abutting against the stepped surface of the connecting rotating seat (6) and the other end abutting against the sliding sleeve (10).

2. The automatic indexing dual-auxiliary rotary support structure for machine tools according to claim 1, characterized in that, The power shaft (3) is provided with an extension section (3c) extending toward the connecting pivot (6) in a circumferential manner, and the inner wall of the extension section (3c) abuts against the outer wall of the connecting pivot (6).

3. The automatic indexing dual-auxiliary rotary support structure for machine tools according to claim 1, characterized in that, The power shaft (3) has an mounting hole on its inner side, and the end of the spindle (8) extends into the mounting hole, so that the indexing gear (3a) is located between the two ends of the spindle (8).

4. The automatic indexing dual-auxiliary rotary support structure for machine tools according to claim 1, characterized in that, The oil passage includes a first oil passage (12a) located on the fixed sleeve (12) and a second oil passage (6e) located on the connecting rotary seat (6); the second oil passage (6e) is connected to the outer side of the connecting rotary seat (6) and an annular groove (6f) surrounding the connecting rotary seat (6) is provided at one end.

5. The automatic indexing dual-auxiliary rotary support structure for machine tools according to claim 1, characterized in that, The inner cavity is arranged in a ring around the outside of the connecting pivot (6).

6. The automatic indexing dual-auxiliary rotary support structure for machine tools according to claim 1, characterized in that, The damping sheet (5a) is provided with a rubber layer facing the end face of the sliding sleeve (10).

7. A working method for an automatic indexing dual-auxiliary rotary support structure for machine tools, characterized in that, Using the automatic indexing dual auxiliary rotary support structure for machine tools as described in any one of claims 1 to 6, the steps include: When the cutter arm (1) needs to rotate, the power device first drives the power shaft (3) to move toward the cutter arm (1), so that the indexing gear (3a) and the indexing plate (4) are misaligned. Then the power device drives the power shaft (3) to rotate, thereby driving the cutter arm (1) to rotate. When the cutter arm (1) needs to be fixed, the power device drives the power shaft (3) to move away from the cutter arm (1), so that the indexing gear (3a) and the indexing plate (4) are aligned radially, and the indexing gear (3a) and the indexing plate (4) mesh with each other, thereby restricting the rotation of the cutter arm (1).

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