Shaft extension structure of servo motor for tool turret

Abstract

The invention relates to the technical field of tool turrets, in particular to a shaft extension structure of a servo motor for a tool turret. The invention provides a shaft extension structure of a servo motor for a tool turret. The shaft extension structure comprises the servo motor and a planetary reducing mechanism, the servo motor comprises a rotor, the rotor is provided with a rotating shaft, a gear is arranged at the end of the shaft extension part of the rotating shaft, and the servo motor is applied to the tool turret and provides power for the tool turret. And the planetary speed reducing mechanism comprises a planet wheel, the planet wheel is meshed with the gear, and the planetary speed reducing mechanism is used for being connected with the servo motor and adjusting the torque and the rotating speed transmitted to the tool turret by the servo motor. The problem that the connecting structure between the motor and the tool turret speed reducing mechanism cannot meet the requirement for compactness is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of turrets, in particular to a shaft extension structure of a servo motor for a turret. Background Art

[0002] As a core functional component of a CNC lathe, the turret's structural characteristics directly impact the machine's cutting performance and operating efficiency. The motor-driven turret, a mainstream feature of current CNC lathes, connects the motor to the turret through a turret reduction mechanism. This mechanism transmits motor power and torque, matches power speed, and adjusts the inertia between the application-side mechanical load and the drive-side motor.

[0003] At present, in many turret structures, the connection method between the motor and the first-stage reduction gear in the turret reduction mechanism is through a expansion sleeve, which requires the first-stage reduction gear to be made into a hole-sleeve flange structure, so that the gear can be tightened and connected to the cylindrical shaft of the motor using a tapered expansion sleeve. However, such a connection structure cannot meet the demand for compactness.

[0004] Therefore, how to provide a connection structure between the motor and the turret that meets the requirements of compactness is a technical problem that needs to be solved urgently. Summary of the Invention

[0005] The present invention provides a shaft extension structure of a servo motor for a turret, which solves the problem that the connection structure between the motor and the turret reduction mechanism cannot meet the demand for compactness.

[0006] The present invention provides a shaft extension structure of a servo motor for a turret, comprising: a servo motor and a planetary reduction mechanism;

[0007] The servo motor includes a rotor having a rotating shaft, and the end of the shaft extension portion of the rotating shaft has a gear. The servo motor is used in the turret to provide power for the turret;

[0008] The planetary reduction mechanism includes a planetary gear, which is engaged with the gear. The planetary reduction mechanism is used to be connected to the servo motor and to adjust the torque and speed transmitted by the servo motor to the turret.

[0009] In one embodiment, the servo motor further includes a motor flange; the motor flange is connected to an end portion of the servo motor and is used to support a rotor of the servo motor.

[0010] In one implementation, the servo motor further includes a stator winding coil; the stator winding coil is disposed in the servo motor and around the rotor.

[0011] In one implementation, the stator winding coil is wound in a slot winding or a full winding manner.

[0012] In one practicable manner, the servo motor further includes a bearing; the bearing is disposed in the servo motor, sleeved on and fixed to the rotating shaft.

[0013] In one embodiment, the servo motor further includes a dust ring; the dust ring is arranged around the bearing to reduce the entry of dust, moisture and other pollutants into the interior of the servo motor.

[0014] In one practicable manner, the planetary reduction mechanism further includes a planet carrier; the planetary gears are provided on the planet carrier.

[0015] In one practicable manner, the planetary reduction mechanism further includes an internal gear ring; the inner ring of the internal gear ring is meshed with the planetary gear.

[0016] In one implementation, the planetary reduction mechanism further includes an output shaft; the output shaft is connected to the planet carrier.

[0017] In one embodiment, the planetary reduction mechanism further includes a protective housing; the protective housing is used to carry the output shaft, the inner ring gear, the planet carrier and the planetary gear.

[0018] The beneficial effects of the present invention are as follows: the rotor on the servo motor rotates, driving the gears to rotate synchronously, and the gears mesh with the planetary gears, thereby operating the planetary reduction mechanism. The torque and speed generated by the original servo motor are adjusted by the planetary reduction mechanism and transmitted to the turret using the servo motor. By directly meshing the gears on the rotating shaft of the servo motor rotor with the planetary gears, the connection structure between the servo motor and the turret using the servo motor is made more compact, and the axial size of the turret using the servo motor can be compressed to the maximum extent. Among turrets of the same specification, the turret using a servo motor will provide a larger design space for machine tool design and make it possible to expand the processing range of the machine tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a cross-sectional view of a shaft extension structure of a servo motor for a turret according to the present invention used in conjunction with the turret;

[0021] Figure 2 The figure is a cross-sectional view of the shaft extension structure of a servo motor for a turret according to the present invention.

[0022] Description of reference numerals:

[0023] 1. Planet carrier; 2. Rotating shaft; 3. Planetary gear; 4. Ring gear; 5. Motor flange; 6. Servo motor; 7. Gear. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, the meaning of "multiple" is two or more, such as two, three, etc., unless otherwise clearly defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] See Figure 1 and Figure 2The present invention provides a shaft extension structure for a servo motor for a tool turret, comprising a servo motor 6 and a planetary reduction mechanism. The servo motor 6 includes a rotor having a rotating shaft 2, and a gear 7 at the end of the shaft extension portion of the rotating shaft 2. The servo motor 6 is used in the tool turret to provide power for the tool turret. The planetary reduction mechanism includes a planetary gear 3, which meshes with the gear 7. The planetary reduction mechanism is used to connect to the servo motor 6 and adjust the torque and speed transmitted by the servo motor 6 to the tool turret.

[0028] Specifically, the rotor on the servo motor 6 rotates, driving the gear 7 to rotate synchronously. The gear 7 meshes with the planetary gear 3, thereby operating the planetary reduction mechanism. The torque and speed generated by the original servo motor 6 are adjusted by the planetary reduction mechanism and transmitted to the turret using the servo motor 6. In this way, the power of the servo motor 6 can be transmitted to the main shaft of the turret using the servo motor 6 through the planetary reduction mechanism, thereby realizing the tool change of the cutter head part of the turret using the servo motor 6. That is, the shaft extension portion of the servo motor 6 rotor shaft 2 is structurally and geometrically integrated according to the parameters of the first-stage gear on the planetary reduction mechanism. Preferably, the module of the gear 7 is 1 and the number of teeth is 11.

[0029] In one embodiment, the servo motor further includes a motor flange; the motor flange is connected to the end of the servo motor to support the rotor of the servo motor 6.

[0030] Specifically, the motor flange 5 is disc-shaped and has at least one through-hole or threaded hole for connection to other components. The motor flange 5 supports the rotor and bearings of the servo motor 6 and also provides a certain sealing effect for the servo motor 6. The servo motor 6 is connected to the turret using the servo motor 6 via the motor flange 5.

[0031] In one embodiment, the servo motor 6 further includes a stator winding coil; the stator winding coil is disposed in the servo motor 6 and surrounds the rotor.

[0032] Specifically, the stator winding coils consist of a set of stator coils. The stator coils are typically wound from a conductor coil, such as copper wire, and are supported and secured by a stator core. The stator coils are three-phase windings, meaning three mutually balanced coils. This design helps generate a rotating magnetic field, thereby enabling the operation of the servo motor 6. Under the action of a three-phase AC power supply, the current in the stator coils continuously changes, generating a magnetic field that drives the rotor to rotate.

[0033] In one embodiment, the stator winding coil is wound using either slot winding or full winding. Specifically, slot winding divides the stator winding coil into multiple slots, and the conductor coils are wound around these slots. This helps reduce electromagnetic noise from the servo motor 6. Full winding winds the conductor coils around the entire stator, enabling the servo motor 6 to achieve higher torque and torque smoothness. Either slot winding or full winding can be selected based on the specific situation.

[0034] In one embodiment, the servo motor 6 further includes a bearing; the bearing is disposed in the servo motor 6 , sleeved on and fixed to the rotating shaft 2 .

[0035] Specifically, the bearings can improve the rotational freedom of the rotor and reduce the friction between the rotor and the servo motor 6. The bearings are divided into front bearings and rear bearings. The front bearing is located at the output end of the servo motor 6 and is used to support and position the front of the rotor. The front bearing mainly bears the radial force and axial force from the load, as well as the inertia force of the servo motor 6 itself. The front bearing can be a deep groove ball bearing, a cylindrical roller bearing or an angular contact ball bearing. The rear bearing is located at the input end of the servo motor 6 and is used to support and position the rear of the rotor. The rear bearing mainly bears the axial force generated by the servo motor 6 during operation to prevent the rotor from axial displacement during operation. The rear bearing can be a thrust ball bearing or a thrust roller bearing.

[0036] In one embodiment, the servo motor 6 further includes a dust ring; the dust ring is arranged around the bearing to reduce dust, moisture and other pollutants from entering the interior of the servo motor 6.

[0037] Specifically, the dust seal is made of a wear-resistant and chemical-resistant material with a certain degree of elasticity and sealing properties, such as rubber or polyurethane. The dust seal tightly seals the gaps between the bearing and the servo motor 6, preventing dust, dirt, moisture, and chemicals from entering the servo motor 6. This prevents wear and corrosion on the bearing and internal components of the servo motor 6, thereby protecting the life and performance of the servo motor 6. It also prevents lubricant loss and contamination from the external environment, ensuring good lubrication of the bearing and internal components of the servo motor 6, and reducing friction and wear.

[0038] In one embodiment, the planetary reduction mechanism further includes a planetary carrier 1, on which the planetary gears 3 are mounted. The number of planetary gears 3 is adjusted as needed, preferably three, and all three planetary gears 3 mesh with a centrally located gear 7. The number of teeth on each planetary gear 3 is greater than that on the gear 7. Planetary gears are evenly spaced on the end surface of the planetary carrier 1. When the rotor rotates, it drives the gear 7, which in turn rotates the planetary gears 3 and the planetary carrier 1 accordingly.

[0039] In one embodiment, the planetary reduction mechanism further includes an inner ring gear 4; the inner ring of the inner ring gear 4 meshes with the planetary gears 3. The inner ring gear is a ring gear with teeth on the inner ring. When the rotor rotates, it drives the gear 7 to rotate, thereby driving the planetary gears 3 to rotate, and the planet carrier 1 rotates on the inner ring of the inner ring gear.

[0040] In one embodiment, the planetary reduction mechanism further includes an output shaft connected to the planetary carrier 1. The output shaft is connected to the center of the planetary carrier 1. When the rotor rotates, it drives the gear 7, the planetary gears 3, and the planetary carrier 1 on the inner ring of the internal gear, thereby driving the output shaft. The output shaft is connected to the tool turret powered by the servo motor 6. Thus, the torque and speed generated by the servo motor 6 are adjusted by the planetary reduction mechanism and transmitted to the tool turret powered by the servo motor 6.

[0041] In one embodiment, the planetary reduction mechanism further includes a protective housing; the protective housing is used to support the output shaft, the inner ring gear 4, the planet carrier 1, and the planetary gears 3. The inner ring gear 4 is fixedly mounted on the inner wall of the protective housing, and the inner ring of the inner ring gear 4 meshes with the planetary gears 3. The planetary gears 3 are mounted on the planetary carrier 1. Therefore, the protective housing protects and supports the output shaft, the inner ring gear 4, the planetary carrier 1, and the planetary gears 3.

[0042] Compared with the prior art, the present application solves the problem of difficulty in machining the first-stage speed reduction gear. In the background art, the first-stage speed reduction gear adopts a sleeve-type flange structure and a gear shaft structure. When the gear module is small and the number of teeth is small, the outer diameter of the gear shaft will be small. Since the speed reduction achieved by the reduction structure in the background art is relatively large, the power of the driving motor will also be small, and the corresponding motor shaft extension cylindrical diameter will also be small. Therefore, the size of the sleeve of the first-stage speed reduction gear in the background art solution will also be small. For such parts, whether from the aspect ratio or the size, it will bring great difficulties to the clamping and machining of such parts, making it difficult to guarantee the geometric accuracy and dimensional accuracy of such parts to a large extent. In addition, because the first-stage speed reduction gear rotates at a high speed, the turret indexing noise will increase and the turret quality will decrease if the accuracy is poor.

[0043] This solves the problem of a compact turret axial size design. This technical solution maximizes the reduction in the axial size of the turret. Among turrets of the same specification, a compact turret offers greater design flexibility for machine tool design, especially within a given Z-axis travel range. This compact size allows for an expanded machining range.

[0044] It should be noted that all components in this application are standard parts in the mechanical field, and no special improvements have been made to the dimensions of the components.

[0045] In the above embodiments, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0046] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "mode", "specific mode", or "some modes" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or mode are included in at least one embodiment or mode of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or modes in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or modes and features of different embodiments or modes described in this specification without contradiction.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A shaft extension structure for a servo motor for a turret, characterized in that: include: Servo motor and planetary reduction mechanism; The servo motor includes a rotor having a rotating shaft, and the end of the shaft extension portion of the rotating shaft has a gear. The servo motor is used in the turret to provide power for the turret; The planetary reduction mechanism includes a planetary gear, which is engaged with the gear. The planetary reduction mechanism is used to be connected to the servo motor and to adjust the torque and speed transmitted by the servo motor to the turret.

2. The shaft extension structure of the servo motor for the turret according to claim 1, characterized in that: The servo motor further includes a motor flange; the motor flange is connected to the end of the servo motor and is used to support the rotor of the servo motor.

3. The shaft extension structure of the servo motor for the turret according to claim 2, characterized in that: The servo motor further includes a stator winding coil; the stator winding coil is arranged in the servo motor and surrounds the rotor.

4. The shaft extension structure of the servo motor for the turret according to claim 3, characterized in that: The stator winding coil is wound in a slot winding or a full winding manner.

5. The shaft extension structure of the servo motor for the turret according to claim 4, characterized in that: The servo motor further includes a bearing; the bearing is arranged in the servo motor, sleeved on and fixed on the rotating shaft.

6. The shaft extension structure of the servo motor for the turret according to claim 5, characterized in that: The servo motor further includes a dust ring; the dust ring is arranged around the bearing and is used to prevent dust, moisture and other pollutants from entering the interior of the servo motor.

7. The shaft extension structure of the servo motor for the turret according to claim 6, characterized in that: The planetary reduction mechanism further includes a planet carrier; the planetary gears are arranged on the planet carrier.

8. The shaft extension structure of the servo motor for the turret according to claim 7, characterized in that: The planetary reduction mechanism further includes an inner ring gear; the inner ring of the inner ring gear is meshed with the planetary gear.

9. The shaft extension structure of the servo motor for the turret according to claim 8, characterized in that: The planetary reduction mechanism further includes an output shaft; the output shaft is connected to the planet carrier.

10. The shaft extension structure of the servo motor for the turret according to claim 9, characterized in that: The planetary reduction mechanism further includes a protective housing; the protective housing is used to carry the output shaft, the inner ring gear, the planet carrier and the planetary gear.

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