Rotary device, slewing head, rotary table and machine tool

Abstract

This invention provides a rotating device, a swivel head, a turntable, and a machine tool. The rotating device includes a fixed body, a rotating body, and a time grid assembly. The time grid assembly includes a paired time grid stator and a time grid rotor, and also includes an expansion sleeve. The expansion sleeve includes a sleeve body and a locking screw. The sleeve body is movably fitted onto the outer periphery of the rotating body along the axial direction. The locking screw is used to lock the sleeve body to the rotating body. The time grid rotor is fixed on the sleeve body. The expansion sleeve is used to adjust the distance between the time grid stator and the time grid rotor in the axial direction of the rotating body. In this invention, when it is necessary to adjust the distance between the time grid stator and the time grid rotor in the axial direction of the rotating body, the sleeve body is moved along the axial direction of the rotating body by loosening the locking screw, thereby moving the time grid rotor fixed on the sleeve body. Then, by tightening the locking screw, the sleeve body is locked onto the rotating body, achieving dynamic and precise adjustment of the distance between the time grid stator and the time grid rotor, significantly improving the detection accuracy and operational reliability of the rotating device.

Description

Technical Field

[0001] This utility model relates to the field of machine tools, and more specifically, to a rotating device, a swivel head, a turntable, and a machine tool. Background Technology

[0002] In modern industrial manufacturing, machine tools, as core equipment for precision machining, directly determine product quality and production efficiency through the accuracy and stability of their moving parts. Rotary mechanisms, as core structures of key components such as machine tool swivel heads and rotary tables, are typically equipped with time-grid assemblies for high-precision angle or displacement detection. The relative distance between the time-grid stator and rotor significantly impacts detection accuracy.

[0003] Traditional installation methods for time grating components in rotating mechanisms have several shortcomings. Most rotating mechanisms employ a fixed assembly structure, making it difficult to adjust the axial distance between the time grating stator and rotor after assembly. Installation errors or component wear due to long-term operation directly affect the detection accuracy of the time grating signal, leading to inaccurate machine tool motion control. While some improved solutions attempt to adjust the distance by adding or removing shims, these methods suffer from cumbersome operation, limited adjustment range, and poor structural stability, failing to meet the accuracy maintenance requirements of machine tools under prolonged high-load operation. Utility Model Content

[0004] The embodiments of this utility model aim to solve at least one of the problems in the prior art. The embodiments of this utility model provide a rotating device, a swivel head, a turntable, and a machine tool. The rotating device includes a fixed body, a rotating body, a time grid assembly, and a expanding sleeve. By setting an axially movable expanding sleeve structure, combined with a rotating connecting disc, a shoulder structure, and other designs, the defects of low time grid detection accuracy, inconvenient adjustment, and poor structural stability in the prior art are effectively overcome, significantly improving the detection accuracy and operational reliability of the machine tool rotating device.

[0005] The relevant technical solutions of the embodiments of this utility model include the following:

[0006] A first aspect of the present invention provides a rotating device, including a fixed body, a rotating body, and a time grid assembly. The time grid assembly includes a time grid stator and a time grid rotor arranged in pairs. The time grid stator is fixed to the fixed body. The device also includes an expansion sleeve, which includes a sleeve body and a locking screw. The sleeve body is movably fitted onto the outer periphery of the rotating body along the axial direction of the rotating body. The locking screw is used to lock the sleeve body and the rotating body. The time grid rotor is fixed to the sleeve body. The expansion sleeve is used to adjust the distance between the time grid stator and the time grid rotor in the axial direction of the rotating body.

[0007] Optionally, the rotating device further includes an annular rotating connecting disk, which is sleeved on the rotating body. The inner sidewall of the rotating connecting disk is fixed to one end of the sleeve, and the inner sidewall of the timer rotor is fixed to the outer sidewall of the rotating connecting disk.

[0008] Optionally, the rotating connecting disc is provided with a clearance ring groove on the side facing the expansion sleeve, and the clearance ring groove is adapted to the sleeve body; the rotating connecting disc is provided with a clearance step on the side facing the time grid rotor, and the time grid rotor is fixed on the clearance step.

[0009] Optionally, the rotating body includes a first rotating part and a second rotating part connected by a shoulder structure, wherein the outer diameter of the first rotating part is larger than that of the second rotating part, the sleeve is fitted onto the second rotating part, and the sleeve and the shoulder structure have a predetermined distance.

[0010] Optionally, the sleeve is an annular structure, the inner diameter of the sleeve is greater than or equal to the outer diameter of the second rotating part, one side wall of the sleeve has an axially penetrating opening, and the locking screw locks the sleeve at the opening; connecting holes that cooperate with the locking screw are provided on both sides of the opening, and the locking screw passes through the connecting holes to lock the sleeve on the outer circumferential surface of the rotating body.

[0011] Optionally, the rotating device further includes a time grid connecting cover, and the outer periphery of the time grid stator is fixed to the fixed body through the time grid connecting cover.

[0012] Optionally, the rotating device further includes a positioning nut, and a positioning thread is provided on a section of the second rotating part near the shoulder structure. The positioning nut is screwed onto the positioning thread, and one side of the positioning nut abuts against the sleeve.

[0013] Another embodiment of this utility model provides a swivel head, including a base, a spindle box, a drive mechanism, and a rotating device as described in one of the aforementioned embodiments. A spindle is installed inside the spindle box, and the drive mechanism is installed inside the base. The drive mechanism is used to drive the spindle box to rotate relative to the base. The fixed body is connected to or integrally formed with the base, and the rotating body is connected to or integrally formed with the spindle box.

[0014] Another aspect of this utility model provides a turntable, including a base and a worktable, characterized in that it further includes a rotating device as described in one of the aforementioned embodiments, wherein the fixed body of the rotating device is fixedly connected to or integrally formed with the base, and the rotating body of the rotating device is fixedly connected to or integrally formed with the worktable.

[0015] Another aspect of this utility model embodiment also provides a machine tool, including a machine tool body, and further including a swivel head and / or a rotary table as described in one of the aforementioned embodiments, wherein the swivel head and / or rotary table is disposed on the machine tool body.

[0016] The technical solution regarding the rotating device in this embodiment of the utility model has at least the following technical effects:

[0017] The present invention provides a rotating device, a swivel head, a turntable, and a machine tool. The rotating device includes a fixed body, a rotating body, a time grid assembly, and a sleeve. The sleeve includes a sleeve body and a locking screw. The sleeve body is movably fitted onto the outer periphery of the rotating body along the axial direction. When it is necessary to adjust the distance between the time grid stator and the time grid rotor in the axial direction of the rotating body, the sleeve body can be moved along the axial direction of the rotating body by first loosening the locking screw, thereby driving the time grid rotor fixed on the sleeve body to move. Then, the sleeve body is firmly locked onto the rotating body by tightening the locking screw, thereby realizing the dynamic and precise adjustment of the distance between the time grid stator and the time grid rotor. This effectively overcomes the defects of low time grid detection accuracy, inconvenient adjustment, and poor structural stability in the prior art, and significantly improves the detection accuracy and operational reliability of the machine tool rotating device.

[0018] It is easy to understand that the related technical solutions of the swivel head, turntable and machine tool in the embodiments of this utility model have at least the corresponding technical effects of the rotating device technical solution, which will not be elaborated here. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the rotating device in an embodiment of the present utility model;

[0020] Figure 2 This is a partial view of the rotating device in an embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of the expansion sleeve in an embodiment of the present utility model;

[0022] Figure 4 This is a cross-sectional view of the rotating device including the positioning nut in an embodiment of the present invention.

[0023] Figure 5 This is a schematic diagram of the swing head structure in an embodiment of the present utility model.

[0024] The attached figures are labeled as follows:

[0025] 1-Rotating body, 2-Timer assembly, 3-Expansion sleeve, 4-Rotating connecting disc, 5-Timer connecting cover, 6-Positioning nut

[0026] 11-First rotating part, 12-Second rotating part, 13-Shoulder structure, 21-Time grid stator, 22-Time grid rotor, 31-Sleeve, 32-Locking screw, 41-Allowing ring groove, 42-Allowing step

[0027] 311 - Opening gap, 312 - Connecting hole Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0029] It should be noted that in the description of this utility model, the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0031] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" and "second" may explicitly or implicitly include one or more features.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection or a connection that can communicate with each other; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two elements, an indirect connection, or an interaction between two elements.

[0033] The following disclosure provides many different implementation methods or examples for different solutions to implement this utility model.

[0034] On the one hand, such as Figures 1 to 3 As shown, this embodiment of the utility model provides a rotating device. Figures 1 to 3 As shown, the rotating device includes a fixed body, a rotating body 1, and a time grating assembly 2. The time grating assembly 2 includes a paired time grating stator 21 and a time grating rotor 22. The time grating stator 21 is fixed to the fixed body. The fixed body is the basic support structure of the rotating device, ensuring the stability of the time grating stator 21. The rotating body 1 is the core rotating component of the rotating device. When the rotating body 1 rotates, it drives the time grating rotor 22 and other connecting components to rotate synchronously. The time grating stator 21 and the time grating rotor 22 are paired. The time grating stator 21 is fixed to the fixed body and remains relatively stationary with the fixed body. The time grating rotor 22 rotates synchronously with the rotating body 1. The time grating stator 21 and the time grating rotor 22 generate periodic electrical signals through relative motion, thereby achieving high-precision measurement of position and speed.

[0035] In this embodiment, the rotating device further includes an expansion sleeve 3, which includes a sleeve body 31 and a locking screw 32. The sleeve body 31 is movably fitted onto the outer periphery of the rotating body 1 along the axial direction. The locking screw 32 is used to lock the sleeve body 31 to the rotating body 1. The time grid rotor 22 is fixed on the sleeve body 31. The expansion sleeve 3 is used to adjust the distance between the time grid stator 21 and the time grid rotor 22 in the axial direction of the rotating body 1. In the initial state, the locking screw 32 is tightened, the sleeve body 31 is fixed on the outer periphery of the rotating body, and the time grid stator 21 and the time grid rotor 22 maintain the initial set distance. When the locking screw 32 is loosened, the sleeve body 31 can slide along the axial direction of the rotating body 1, causing the time grid rotor 22 to move synchronously, thereby changing the distance between the time grid stator 21 and the time grid rotor 22 in the axial direction of the rotating body 1. Then tighten the locking screw 32. The inner wall of the sleeve 31 is in close contact with the outer circumferential surface of the rotating body 1. The friction prevents the sleeve 31 from moving axially, so that the sleeve 31 is fixed on the outer circumferential surface of the rotating body 1. This ensures that the adjusted sleeve 31 is in a stable position, realizes the dynamic and precise adjustment of the distance between the time grid stator and the time grid rotor, and significantly improves the detection accuracy and operational reliability of the machine tool rotating device.

[0036] like Figure 1 and Figure 2As shown, the rotating device also includes an annular rotating connecting disk 4, used to connect the rotating body 1, the expansion sleeve 3, and the time grid rotor 22, realizing the fixation of the structure and the transmission of motion. The rotating connecting disk 4 is sleeved on the rotating body 1, and the inner sidewall of the rotating connecting disk 4 is fixed to one end of the sleeve 31, while the inner sidewall of the time grid rotor 22 is fixed to the outer sidewall of the rotating connecting disk 4. When the sleeve 31 moves along the axial direction of the rotating body 1, the rotating connecting disk 4 moves accordingly along the axial direction of the rotating body 1, thereby driving the time grid rotor 22 to move synchronously along the axial direction of the rotating body 1. Through the mediating effect of the rotating connecting disk 4, the adjustment of the time grid rotor 22 along the axial position of the rotating body 1 by the expansion sleeve 3 is more direct and efficient, without the need for additional complex structures. At the same time, it enhances the connection stiffness between the rotating body 1, the expansion sleeve 3, and the time grid rotor 22, reduces vibration during rotation, and ensures the synchronization of the time grid rotor 22 and the rotating body 1, especially in high-speed scenarios, avoiding detection errors caused by transmission lag, ensuring the stability of the electrical signal generated by the time grid assembly 2, and improving measurement accuracy.

[0037] like Figure 2 As shown, the rotating connecting plate 4 is provided with a clearance ring groove 41 on the side facing the expansion sleeve 3. The clearance ring groove 41 is adapted to the sleeve body 31 to realize the axial positioning and limiting of the expansion sleeve 3 and avoid the radial shaking of the expansion sleeve 3, ensuring the coaxiality of the rotating connecting plate 4 and the expansion sleeve 3, and avoiding eccentric vibration during rotation. The rotating connecting plate 4 is provided with a clearance step 42 on the side facing the time grid rotor 22, which provides an installation reference and axial limiting for the time grid rotor 22, simplifying the assembly process. The time grid rotor 22 is fixed on the clearance step 42 to ensure the axial position accuracy of the time grid rotor 22 during installation, prevent the time grid rotor 22 from axially moving during rotation, and improve the stability of the distance between the time grid rotor 22 and the time grid stator 21 during operation.

[0038] like Figure 1 As shown, the rotating body 1 includes a first rotating part 11 and a second rotating part 12 connected by a shoulder structure 13. The outer diameter of the first rotating part 11 is larger than that of the second rotating part 12. The sleeve 31 is sleeved on the second rotating part 12. The shoulder structure 13 serves as an axial positioning reference, limiting the maximum axial movement range of the sleeve 31 and preventing the sleeve 31 from rigidly colliding with the shoulder structure 13 during axial movement. The sleeve 31 and the shoulder structure 13 have a predetermined distance, providing physical space for the sleeve 31 to move along the axial direction of the rotating body 1, so that the time grating rotor 22 can dynamically adjust the distance between itself and the time grating stator 21.

[0039] like Figure 3As shown, the sleeve 31 has a ring structure, enabling an adjustable connection with the rotating body 1. The inner diameter of the sleeve 31 is greater than or equal to the outer diameter of the second rotating part 12, forming a clearance fit. One side wall of the sleeve 31 has an axially penetrating opening 311, giving the sleeve 31 a certain elastic deformation capability. The locking screw 32 locks the sleeve 31 at the opening 311. When the locking screw 32 is loosened, the sleeve 31 and the rotating body 1 are in a clearance fit and can slide freely axially, used to adjust the axial distance between the time grid stator 21 and the time grid rotor 22. When the locking screw 32 is tightened, the sleeve 31 radially contracts to hug the rotating body 1, forming a rigid connection, thus realizing the dual functions of adjustable connection and rigid fixation between the sleeve 31 and the rotating body 1.

[0040] Meanwhile, connecting holes 312 are provided on both sides of the opening slit 311 to mate with the locking screw 32. The locking screw 32 passes through the connecting holes 312 to lock the sleeve 31 onto the outer circumference of the rotating body 1, so that the tightening force of the locking screw 32 is effectively converted into the radial contraction force of the sleeve 31. When the locking screw 32 is tightened, the distance between the connecting holes 312 on both sides decreases, and the width of the opening slit 311 decreases simultaneously, which further causes the inner diameter of the sleeve 31 to shrink, realizing the interference fit between the sleeve 31 and the rotating body 1. When the screw is loosened, the inner diameter of the sleeve 31 expands, restoring the clearance fit with the rotating body 1, realizing reliable and continuous dynamic adjustment.

[0041] like Figure 1 As shown, in some embodiments of this application, the rotating device further includes a time grating connecting cover 5. The outer periphery of the time grating stator 21 is fixed to the fixed body through the time grating connecting cover 5, thereby providing stable support for the time grating stator 21 and avoiding external interference from affecting the detection signal.

[0042] like Figure 4 As shown, in some embodiments of this application, the rotating device further includes a positioning nut 6. A positioning thread is provided on a section of the second rotating part 12 near the shoulder structure 13. The positioning nut 6 is screwed onto the positioning thread, and one side of the positioning nut 6 abuts against the sleeve 31, thereby realizing precise adjustment of the sliding of the sleeve 31 in the axial direction of the second rotating part 12. This further realizes the dynamic and precise adjustment of the distance between the time grid stator 21 and the time grid rotor 22. The positioning nut 6 cooperates with the expansion sleeve 3. On the one hand, it can accurately determine the position of the expansion sleeve 3 to ensure the measurement accuracy of the time grid assembly 2. On the other hand, it can lock the expansion sleeve 3 at a predetermined position on the rotating part 1 to avoid loosening and detection errors during the operation of the rotating part 1.

[0043] like Figure 5As shown, another aspect of this utility model embodiment provides a swivel head, including a base 10, a spindle box 20, a drive mechanism 30, and a rotating device as described in one of the previous embodiments. A spindle is installed inside the spindle box 20, and the drive mechanism 30 is installed inside the base 10. The drive mechanism 30 is used to drive the spindle box 20 to rotate relative to the base 10. The fixed body is connected to or integrally formed with the base 10, and the rotating body 1 is connected to or integrally formed with the spindle box 20.

[0044] Another aspect of this utility model provides a turntable, including a base and a worktable, and also includes a rotating device as described in one of the previous embodiments. The fixed body of the rotating device is fixedly connected to the base or integrally formed, and the rotating body 1 of the rotating device is fixedly connected to the worktable or integrally formed.

[0045] Another aspect of this utility model embodiment also provides a machine tool, including a machine tool body, and further including a swivel head as described in one of the preceding embodiments and / or a rotary table as described in one of the preceding embodiments, wherein the swivel head and / or rotary table is disposed on the machine tool body.

[0046] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A rotating device, comprising a fixed body, a rotating body (1), and a time grating assembly (2), wherein the time grating assembly (2) includes a paired time grating stator (21) and a time grating rotor (22), the time grating stator (21) being fixed to the fixed body, characterized in that, It also includes an expansion sleeve (3), which includes a sleeve body (31) and a locking screw (32). The sleeve body (31) is movably fitted onto the outer periphery of the rotating body (1) along the axial direction of the rotating body (1). The locking screw (32) is used to lock the sleeve body (31) and the rotating body (1). The time grating rotor (22) is fixed on the sleeve body (31). The expansion sleeve (3) is used to adjust the distance between the time grating stator (21) and the time grating rotor (22) in the axial direction of the rotating body (1).

2. The rotating device according to claim 1, characterized in that, It also includes an annular rotating connecting disk (4), which is sleeved on the rotating body (1). The inner sidewall of the rotating connecting disk (4) is fixed to one end of the sleeve (31), and the inner sidewall of the time grid rotor (22) is fixed to the outer sidewall of the rotating connecting disk (4).

3. The rotating device according to claim 2, characterized in that, The rotating connecting disc (4) is provided with a clearance ring groove (41) on the side facing the expansion sleeve (3), and the clearance ring groove (41) is adapted to the sleeve body (31); the rotating connecting disc (4) is provided with a clearance step (42) on the side facing the time grid rotor (22), and the time grid rotor (22) is fixed on the clearance step (42).

4. The rotating device according to any one of claims 1-3, characterized in that, The rotating body (1) includes a first rotating part (11) and a second rotating part (12) connected by a shoulder structure (13), wherein the outer diameter of the first rotating part (11) is larger than that of the second rotating part (12), the sleeve (31) is sleeved on the second rotating part (12), and the sleeve (31) has a predetermined distance from the shoulder structure (13).

5. The rotating device according to claim 4, characterized in that, The sleeve (31) is an annular structure. The inner diameter of the sleeve (31) is greater than or equal to the outer diameter of the second rotating part (12). One side wall of the sleeve (31) has an axially penetrating opening (311). The locking screw (32) locks the sleeve (31) at the opening (311). Connecting holes (312) that cooperate with the locking screw (32) are provided on both sides of the opening (311). The locking screw (32) passes through the connecting holes (312) to lock the sleeve (31) on the outer circumferential surface of the rotating body (1).

6. The rotating device according to claim 5, characterized in that, It also includes a time grid connection cover (5), the outer periphery of the time grid stator (21) is fixed to the fixing body through the grid connection cover (5).

7. The rotating device according to claim 4, characterized in that, It also includes a positioning nut (6), and the second rotating part (12) is provided with a positioning thread on a section near the shoulder structure (13). The positioning nut (6) is screwed on the positioning thread, and one side of the positioning nut (6) abuts against the sleeve (31).

8. A swivel head, comprising a base (10), a spindle box (20), and a drive mechanism (30), characterized in that, It also includes a rotating device as described in any one of claims 1-7, wherein a spindle is installed in the spindle box (20), the driving mechanism (30) is installed in the base (10), the driving mechanism (30) is used to drive the spindle box (20) to rotate relative to the base (10), the fixed body is connected to or integrally formed with the base (10), and the rotating body (1) is connected to or integrally formed with the spindle box (20).

9. A turntable, comprising a base and a worktable, characterized in that, It also includes a rotating device as described in any one of claims 1-7, wherein the fixed body of the rotating device is fixedly connected to or integrally formed with the base, and the rotating body (1) of the rotating device is fixedly connected to or integrally formed with the worktable.

10. A machine tool, comprising a machine tool body, characterized in that, It also includes the swivel head as described in claim 8 and / or the rotary table as described in claim 9, wherein the swivel head and / or rotary table is disposed on the machine tool body.

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