A hobbing machine center locking positioning device

Abstract

The present disclosure relates to the technical field of hobbing machine auxiliary machining, and an embodiment of the present disclosure provides a hobbing machine center locking positioning device, which comprises a base frame and a rotating table, the rotating table is arranged on the base frame, a rotating driving assembly is arranged between the rotating table and the base frame, and a positioning fixing assembly is arranged on the rotating table, wherein the positioning fixing assembly comprises a bracket, a plurality of stand columns are arranged at the bottom of the bracket, the bracket is fixed on the rotating table through the stand columns, a plurality of connecting grooves are arranged around the inner surface of the bracket, movable columns are movably sleeved in the connecting grooves, and an inner support frame is arranged at one end of the movable column. Through the above technical scheme, the technical problem that the traditional mode in the prior art relies on manual adjustment of a center or a chuck, the coaxiality of a gear center and a machine tool main shaft needs to be repeatedly calibrated, the operation steps are complicated, and a large amount of auxiliary time is consumed is solved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the technical field of auxiliary machining for gear hobbing machines, and specifically to a center locking and positioning device for a gear hobbing machine. Background Technology

[0002] In gear manufacturing, the gear hobbing machine is a key piece of equipment for machining gear teeth. The positioning and locking accuracy of the gear on the hobbing machine directly determines the accuracy and consistency of the tooth profile machining, and has a significant impact on the gear's meshing performance, transmission efficiency, and service life. Whether it is a standard gear or a special-shaped gear, the machining process requires precise fixing with the center as a reference to ensure the relative position stability of the hob and the workpiece.

[0003] Currently, the gear positioning and locking methods used in gear hobbing machines have significant drawbacks, failing to achieve rapid positioning and efficient locking. Traditional methods rely heavily on manual adjustment of the center or chuck, requiring repeated calibration of the coaxiality between the gear center and the machine spindle. This cumbersome process consumes considerable auxiliary time. For gears produced in batches, the positioning and locking process must be repeated for each new workpiece, severely reducing production efficiency.

[0004] Meanwhile, manual operation suffers from poor stability. Insufficient locking force can cause gears to wobble during processing, leading to increased tooth profile errors; excessive locking can deform the gear blank, affecting subsequent machining accuracy. This positioning and locking method not only increases the labor intensity of operators but also struggles to meet the demands of high-precision, fast-paced modern gear production. Therefore, developing a gear hobbing machine center locking positioning device capable of quickly positioning and reliably locking gears has become an urgent need in the industry to improve processing efficiency and quality. Utility Model Content

[0005] To overcome the above-mentioned defects, the embodiments of this disclosure provide a gear hobbing machine center locking and positioning device, which solves the technical problem that the traditional method in the prior art relies on manual adjustment of the center or chuck, requires repeated calibration of the coaxiality between the gear center and the machine tool spindle, and has complicated operation steps and consumes a lot of auxiliary time.

[0006] According to one aspect, at least one embodiment of the present disclosure provides a center locking and positioning device for a gear hobbing machine, comprising: A base frame and a rotating platform, wherein the rotating platform is mounted on the base frame; A rotation drive assembly is disposed between the rotary table and the base frame; A positioning and fixing component is disposed on the rotating platform; The positioning and fixing component includes a bracket with several columns at the bottom. The bracket is fixed to the rotating platform by the columns. Several connecting grooves are opened around the inner surface of the bracket. Movable columns are movably connected in the connecting grooves. An inner support frame is provided at one end of the movable column.

[0007] As a further technical solution, a spring is fitted onto the movable column, the spring is supported between the inner support frame and the inner wall of the bracket, and a stud is provided on the surface of the rotating table, with a support column connected to the stud by a threaded connection.

[0008] As a further technical solution, an inclined platform is provided at the lower end of the inner surface of the inner support frame, the upper end of the support column slides against the inner surface of the inclined platform, and a locking nut is connected to the stud by thread engagement.

[0009] As a further technical solution, the rotation drive assembly includes a bottom cavity, which is formed inside the base frame. A drive motor is mounted on the base frame, and the output end of the drive motor is located inside the bottom cavity. A drive gear is provided at the output end of the drive motor.

[0010] As a further technical solution, the bottom of the rotating platform is rotatably connected to the base frame via a rotating shaft. A transmission gear is provided at the lower end of the rotating shaft of the rotating platform, and the transmission gear meshes with the drive gear. An annular slide rail is provided on the surface of the base frame, and the rotating platform is slidably connected to the annular slide rail.

[0011] As a further technical solution, the upper end of the support column has a conical structure.

[0012] As a further technical solution, grooves are provided at both ends of the base frame surface, and several fixing holes are provided in the grooves.

[0013] As a further technical solution, the outer surface of the inner support frame is provided with a raised layer, and the surface of the raised layer is an anti-slip structural surface with high friction.

[0014] The beneficial effects of the embodiments disclosed herein are as follows: In this disclosure, the positioning and fixing component solves the problem of repeated calibration required by traditional positioning methods through a linked internal support design. The support column cooperates with the tilting table to drive the internal support frame to expand synchronously, precisely aligning with the gear center without manual adjustment. Springs provide adaptive elasticity to accommodate gears of different inner diameters, and anti-slip protrusions enhance friction to prevent slippage. Threaded locking ensures a secure fixation, preventing shaking during processing, significantly reducing auxiliary time, improving batch production efficiency, and simultaneously ensuring center positioning accuracy and reducing gear machining errors. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0016] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure; Figure 2 This is an isometric sectional view of the present disclosure; Figure 3 This is another isometric sectional view of this disclosure; In the diagram: 1. Base frame; 2. Rotating table; 3. Positioning and fixing assembly; 3-1. Bracket; 3-2. Column; 3-3. Connecting groove; 3-4. Movable column; 3-5. Inner support frame; 3-6. Spring; 3-7. Stud; 3-8. Support column; 3-9. Tilting table; 3-10. Locking nut; 4. Rotation drive assembly; 4-1. Bottom cavity; 4-2. Drive motor; 4-3. Drive gear; 4-4. Transmission gear; 4-5. Circular slide rail; 5. Groove; 6. Fixing hole; 7. Raised layer. Detailed Implementation

[0017] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0018] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0019] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0020] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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 disclosure.

[0022] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] like Figures 1-3 As shown, a gear hobbing machine center locking positioning device according to an embodiment of the present disclosure is illustrated, comprising: The base frame 1 and the rotating platform 2 are mounted on the base frame 1. Rotation drive assembly 4 is disposed between the rotating table 2 and the base frame 1; Positioning and fixing component 3 is disposed on the rotating table 2; The positioning and fixing component 3 includes a bracket 3-1. Several columns 3-2 are provided at the bottom of the bracket 3-1. The bracket 3-1 is fixed to the rotating platform 2 via the columns 3-2. Several connecting grooves 3-3 are formed around the inner surface of the bracket 3-1. A movable column 3-4 is movably connected within each connecting groove 3-3. An inner support frame 3-5 is provided at one end of the movable column 3-4. A spring 3-6 is fitted onto the movable column 3-4, supporting the inner support frame 3-5 between the inner support frame 3-5 and the inner wall of the bracket 3-1. A stud 3-7 is provided on the surface of the rotating platform 2. A support column 3-8 is threadedly connected to the stud 3-7. An inclined platform 3-9 is formed at the lower end of the inner surface of the inner support frame 3-5. The upper end of the support column 3-8 slides against the inner surface of the inclined platform 3-9. A locking nut 3-10 is threadedly connected to the stud 3-7.

[0024] In some examples, in order to achieve the center positioning and stable fixation of the gear, a positioning and fixing component 3 is designed. This component includes a bracket 3-1 on the rotating table 2, which is welded and fixed by a bottom column 3-2. The columns 3-2 are evenly distributed along the circumference to enhance the stability of the bracket 3-1. A connecting groove 3-3 is opened radially around the inner surface of the bracket 3-1. The movable column 3-4 is slidably fitted in the connecting groove 3-3 and can extend and retract along the groove. The inner support 3-5 at one end is arc-shaped, with its inner side conforming to the inner wall of the gear hole, and an anti-slip rubber pad is pasted on its surface. Spring 3-6 on movable column 3-4 is axially mounted, with one end abutting against inner support frame 3-5 and the other end abutting against inner wall of bracket 3-1, always applying inward elastic force to inner frame. Stud 3-7 on surface of rotating table 2 is vertically welded. Support column 3-8 is connected to stud 3-7 by thread, with upper end in hemispherical shape, sliding against the surface of inclined platform 3-9 at lower end of inner support frame 3-5. Locking nut 3-10 on stud 3-7 is located below support column 3-8, and can lock the position of support column 3-8 by thread engagement.

[0025] During installation, place the gear on the outside of the inner support frame 3-5, rotate the support column 3-8 to make it rise along the stud 3-7, and let the hemispherical upper end slide along the inclined platform 3-9, pushing the inner support frame 3-5 to overcome the elastic force of the spring 3-6 and move it outward along the connecting groove 3-3 until the inner support frame 3-5 is tightly fitted against the inner wall of the gear hole, achieving center positioning and inner support fixation; rotate the locking nut 3-10 upward to tighten it, pressing against the lower end of the support column 3-8 to prevent the support column 3-8 from loosening. During disassembly, rotate the locking nut 3-10 and the support column 3-8 in the opposite direction, the spring 3-6 pushes the inner support frame 3-5 back to its original position, and the gear is released. Connecting groove 3-3 provides guidance for movable column 3-4, ensuring radial movement of inner support frame 3-5. Spring 3-6 provides reset force, allowing inner support frame 3-5 to adapt to gears with different inner diameters. The sliding fit between tilting platform 3-9 and support column 3-8 converts the vertical movement of support column 3-8 into radial movement of inner support frame 3-5, achieving uniform inner support. Anti-slip rubber pads enhance the friction between inner support frame 3-5 and gear inner hole, preventing slippage during rotation. The threaded support column 3-8 and locking nut 3-10 precisely control and lock the inner support force, ensuring stable positioning. This component achieves precise positioning and stable fixation of the gear center through the combination of elastic inner support and threaded locking.

[0026] like Figures 1-3As shown in the figure, the rotary drive assembly 4 in this embodiment includes a bottom cavity 4-1, which is formed inside the base frame 1. A drive motor 4-2 is mounted on the base frame 1, and the output end of the drive motor 4-2 is located inside the bottom cavity 4-1. A drive gear 4-3 is provided at the output end of the drive motor 4-2. The bottom of the rotary table 2 is rotatably connected to the base frame 1 via a rotating shaft. A transmission gear 4-4 is provided at the lower end of the rotating shaft of the rotary table 2. The transmission gear 4-4 meshes with the drive gear 4-3. An annular slide rail 4-5 is provided on the surface of the base frame 1, and the rotary table 2 is slidably connected to the annular slide rail 4-5.

[0027] In some examples, to achieve smooth rotation of the fixed gear, a rotation drive assembly 4 is designed. This assembly includes a closed cavity 4-1 within the base frame 1. A drive motor 4-2 is bolted to the side of the base frame 1, with its output end extending through the wall of the base frame 1 into the cavity 4-1. The drive gear 4-3 at the output end is fixed by a key connection. The rotating shaft at the bottom of the rotating platform 2 is vertically rotatably connected to the center of the base frame 1 via bearings. The transmission gear 4-4 at the lower end of the shaft meshes with the drive gear 4-3, forming a power transmission path. An annular slide rail 4-5 on the surface of the base frame 1 is slidably connected to the slider at the bottom of the rotating platform 2. The slide rail is distributed along the circumference of the rotating platform 2, providing circumferential support for the rotating platform 2.

[0028] During operation, the drive motor 4-2 starts, and its output drives the drive gear 4-3 to rotate. Through gear meshing, the drive gear 4-4 rotates synchronously with the rotating shaft of the rotary table 2. The rotary table 2 rotates smoothly along the rotating shaft on the annular slide rail 4-5, which in turn drives the fixed gear above to rotate synchronously. The meshing transmission between the drive gear 4-3 and the drive gear 4-4 ensures a stable and controllable rotational speed of the rotary table 2, facilitating speed adjustment to meet processing requirements. The annular slide rail 4-5, in conjunction with the slider, provides circumferential support for the rotary table 2, distributing its weight and preventing deformation of the rotating shaft due to excessive force. It also limits the radial offset of the rotary table 2, ensuring the rotation center aligns with the gear center. The bearing connection reduces rotational friction on the rotating shaft, making rotation smoother. The bottom cavity 4-1 provides protection for the gear transmission components, preventing dust and impurities from affecting transmission accuracy. This assembly, through the combination of gear transmission and stable support, achieves smooth and precise rotation of the fixed gear, ensuring the continuity and stability of the processing process. For example, such as Figure 2 As shown, the upper end of the support column 3-8 has a conical structure.

[0029] In some examples, the upper end of the support column 3-8 is a conical structure, which allows for smoother sliding engagement with the tilting platform 3-9 of the inner support frame 3-5. The pointed tip of the cone can precisely embed into the tilting platform 3-9. As the support column 3-8 rises, the contact area between the conical surface and the tilting platform 3-9 gradually increases, causing the inner support frame 3-5 to expand outward more evenly under stress. This prevents deformation of the inner support frame 3-5 due to excessive local stress, ensuring the stability and accuracy of the inner support positioning.

[0030] For example, such as Figure 1 As shown, both ends of the base frame 1 are provided with grooves 5, and a number of fixing holes 6 are provided in the grooves 5.

[0031] In some examples, the notches 5 at both ends of the base frame 1 facilitate the docking and installation of the equipment with external structures. The fixing holes 6 in the notches 5 can be used to insert bolts or other fasteners to firmly fix the base frame 1 to the ground or other equipment, preventing displacement of the device due to vibration during operation, enhancing the stability of the overall structure, and providing a reliable foundation for precise positioning and rotation during gear processing.

[0032] For example, such as Figure 1 As shown, the outer surface of the inner support frame 3-5 is provided with a raised layer 7, and the surface of the raised layer 7 is an anti-slip structural surface with high friction.

[0033] In some examples, the raised layer 7 on the outer surface of the inner support 3-5 increases the contact friction with the inner bore of the gear. The anti-slip structure of the raised layer 7 further enhances the grip between the inner support 3-5 and the inner bore wall of the gear, preventing relative slippage of the gear during rotational machining, ensuring that the gear always rotates stably around the center, guaranteeing machining accuracy, and reducing wear of the inner support 3-5 on the inner bore surface of the gear.

[0034] In practical use: Place the gear on the outside of the inner support frame 3-5, rotate the support column 3-8 on the stud 3-7 to raise it, and let the conical upper end slide along the inclined platform 3-9 of the inner support frame 3-5, pushing the inner support frame 3-5 outward along the connecting groove 3-3 against the elastic force of the spring 3-6 until the anti-slip protrusion 7 of the inner support frame 3-5 tightly fits against the inner wall of the gear hole, completing the center positioning. Rotate the locking nut 3-10 to press against the lower end of the support column 3-8 to prevent loosening. Start the rotation drive assembly 4; the drive motor 4-2 meshes with the transmission gear 4-4 through the drive gear 4-3, driving the rotating table 2 to rotate smoothly along the annular slide rail 4-5, thereby driving the fixed gear to rotate synchronously. After processing, rotate the locking nut 3-10 and the support column 3-8 in the opposite direction; the spring 3-6 pushes the inner support frame 3-5 back to its original position, remove the gear, and the base frame 1 is connected to the external structure through the fixing hole 6 in the slot 5, ensuring overall stability.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A center-locking positioning device for a gear hobbing machine, characterized in that, include: A base frame (1) and a rotating platform (2), wherein the rotating platform (2) is mounted on the base frame (1); A rotation drive assembly (4) is disposed between the rotating table (2) and the base frame (1); Positioning and fixing component (3) is disposed on the rotating table (2); The positioning and fixing component (3) includes a bracket (3-1), and a plurality of columns (3-2) are provided at the bottom of the bracket (3-1). The bracket (3-1) is fixed on the rotating table (2) by the columns (3-2). A plurality of connecting grooves (3-3) are provided around the inner surface of the bracket (3-1). A movable column (3-4) is movably connected in the connecting groove (3-3). An inner support frame (3-5) is provided at one end of the movable column (3-4).

2. The gear hobbing machine center locking and positioning device according to claim 1, characterized in that, A spring (3-6) is fitted onto the movable column (3-4). The spring (3-6) is supported between the inner support frame (3-5) and the inner wall of the bracket (3-1). A stud (3-7) is provided on the surface of the rotating table (2). A support column (3-8) is connected to the stud (3-7) by means of a thread.

3. The gear hobbing machine center locking and positioning device according to claim 2, characterized in that, An inclined platform (3-9) is provided at the lower end of the inner surface of the inner support frame (3-5). The upper end of the support column (3-8) slides against the inner surface of the inclined platform (3-9). A locking nut (3-10) is connected to the stud (3-7) by a threaded connection.

4. The gear hobbing machine center locking and positioning device according to claim 1, characterized in that, The rotation drive assembly (4) includes a bottom cavity (4-1) which is opened inside the base frame (1). A drive motor (4-2) is installed on the base frame (1). The output end of the drive motor (4-2) is located inside the bottom cavity (4-1). A drive gear (4-3) is provided at the output end of the drive motor (4-2).

5. A gear hobbing machine center locking and positioning device according to claim 4, characterized in that, The bottom of the rotating platform (2) is rotatably connected to the base frame (1) via a rotating shaft. A transmission gear (4-4) is provided at the lower end of the rotating shaft of the rotating platform (2). The transmission gear (4-4) meshes with the drive gear (4-3). An annular slide rail (4-5) is provided on the surface of the base frame (1). The rotating platform (2) is slidably connected to the annular slide rail (4-5).

6. A gear hobbing machine center locking and positioning device according to claim 2, characterized in that, The upper end of the support column (3-8) is a conical structure.

7. The gear hobbing machine center locking and positioning device according to claim 1, characterized in that, The base frame (1) has notches (5) at both ends of its surface, and several fixing holes (6) are provided in the notches (5).

8. The gear hobbing machine center locking and positioning device according to claim 1, characterized in that, The outer surface of the inner support frame (3-5) is provided with a raised layer (7), and the surface of the raised layer (7) is an anti-slip structural surface with high friction.

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