Positioning structure for machining main shaft of milling and drilling machine

Abstract

The utility model provides a positioning structure for machining a main shaft of a drilling and milling machine, which belongs to the field of main shaft machining and comprises a base, a support frame is fixedly connected to one side of the top of the base, an electric chuck is arranged on the support frame, an end face positioning structure is arranged on the other side of the top of the base, and a cavity is arranged in the middle of the top of the base. A moving seat is slidably connected into the cavity; and the supporting assembly comprises a supporting box fixedly connected to the moving seat. By means of the supporting assembly, the end, away from the electric chuck, of the main shaft can be stably supported through the supporting plate and the idler wheels on the supporting plate, friction generated when the main shaft rotates can be reduced through the idler wheels, normal machining of the main shaft is not interfered, and the supporting plate can ascend and descend within a certain range through cooperation of the screw and the threaded sleeve. The positioning structure is convenient to adapt to spindles with different outer diameters, the application range of the positioning structure is wide, the spindles are not prone to inclination in the using process, and high machining precision is guaranteed.

Description

Technical Field

[0001] This utility model relates to spindle machining technology, specifically a positioning structure for machining the spindle of a drilling and milling machine. Background Technology

[0002] A machine spindle is the shaft on a machine tool that drives the workpiece or cutting tool to rotate. It is usually composed of a spindle, bearings, and transmission components (gears or pulleys). In a machine, it is mainly used to support transmission components such as gears and pulleys, and to transmit motion and torque, such as a machine tool spindle. Some spindles are used to clamp workpieces, such as mandrels. During spindle machining, a positioning structure is required to fix it in place.

[0003] Existing spindle positioning structures, due to their relatively large size, typically employ a horizontal orientation for positioning and fixing during machining. One end face is clamped by an electric chuck, while the other end face is moved by a moving mechanism until a positioning rod abuts against the other end face of the spindle. The electric chuck then rotates the entire spindle, and a moving cutting tool performs machining on the spindle from the outside. However, in practical use, this positioning structure suffers from drawbacks. Because the spindle is long, only one end face is stably clamped, inevitably causing the other end to tilt under gravity. This tilting affects machining accuracy, and designing a movable electric chuck on the other side significantly increases overall cost. Therefore, we propose a positioning structure for drilling and milling machine spindles to address these problems. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a positioning structure for machining the spindle of a drilling and milling machine to solve the problems mentioned in the background art.

[0005] The purpose of this utility model can be achieved through the following technical solution: it includes a base, a support frame is fixedly connected to one side of the top of the base, an electric chuck is provided on the support frame, an end face positioning structure is provided on the other side of the top of the base, and a cavity is opened in the middle of the top of the base, and a movable seat is slidably connected in the cavity.

[0006] A support assembly includes a support box fixedly connected to a movable base, a support plate on the support box, sliding columns fixedly connected to the four bottom corners of the support plate, a screw fixedly connected to the middle of the bottom of the support plate, guide sleeves fixedly connected to the four top corners of the support box, the sliding columns slidably connected to the inner side of adjacent guide sleeves, a threaded sleeve rotatably connected to the inner bottom wall of the support box, a first bevel gear fixedly connected to the lower outer side of the threaded sleeve, a drive rod rotatably connected to the front side of the support box, a handwheel fixedly connected to one end of the front side of the drive rod, a second bevel gear fixedly connected to one end of the rear side of the drive rod, the second bevel gear meshing with the first bevel gear, and the screw threadedly connected to the inner side of the threaded sleeve.

[0007] Preferably, the top of the support plate has several grooves, and rollers are rotatably connected in the grooves.

[0008] Preferably, a fixing plate is fixedly connected to the bottom inner wall of the support box and to the side near the handwheel, and the active rod passes through the fixing plate and is rotatably connected to its inner side.

[0009] Preferably, the support box has through holes at the four corners of its top that are adapted to the outer diameter of the guide sleeve, and the guide sleeve is fixedly connected to the inside of the through holes.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] The support components provide stable support to the end of the spindle furthest from the electric chuck via the support plate and its rollers. The rollers also reduce friction during spindle rotation and do not interfere with normal machining. The support plate can be raised and lowered within a certain range by the screw and threaded sleeve, making it easy to adapt to spindles with different outer diameters. This results in a wide range of applicability for the positioning structure, and the spindle is less likely to tilt during use, ensuring high machining accuracy. Attached Figure Description

[0012] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0013] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0014] Figure 2 This is one of the enlarged cross-sectional structural schematic diagrams of this utility model;

[0015] Figure 3 This is the second partially enlarged cross-sectional structural schematic diagram of this utility model.

[0016] In the diagram: 1. Base; 2. Support frame; 3. Electric chuck; 4. End face positioning structure; 5. Moving seat; 6. Support box; 7. Support plate; 8. Sliding column; 9. Screw; 10. Guide sleeve; 11. Threaded sleeve; 12. First bevel gear; 13. Driving rod; 14. Handwheel; 15. Second bevel gear; 16. Groove; 17. Roller; 18. Fixing plate. Detailed Implementation

[0017] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] Please see Figures 1-3 As shown, a positioning structure for machining a drilling and milling machine spindle includes a base 1. A support frame 2 is fixedly connected to one side of the top of the base 1. An electric chuck 3 is installed on the support frame 2. An end face positioning structure 4 is installed on the other side of the top of the base 1. A cavity is opened in the middle of the top of the base 1. A movable seat 5 is slidably connected in the cavity. The end face positioning structure 4 is a mature existing technology. A movable mechanism that can move along the axis of the electric chuck 3 is installed on its bottom. A protruding rod for positioning one end face of the spindle is installed on the movable mechanism. The movable seat 5 is an electric drive structure that can drive the support box 6 to move along the length of the cavity in the cavity, which is convenient for adapting to drilling and milling machine spindles of different lengths.

[0019] The support assembly includes a support box 6 fixedly connected to the movable seat 5, a support plate 7 on the upper part of the support box 6, sliding columns 8 fixedly connected to the four bottom corners of the support plate 7, a screw 9 fixedly connected to the middle of the bottom of the support plate 7, guide sleeves 10 fixedly connected to the four top corners of the support box 6 respectively, the sliding columns 8 slidably connected to the inner side of the adjacent guide sleeves 10, a threaded sleeve 11 rotatably connected to the bottom inner wall of the support box 6, a first bevel gear 12 fixedly connected to the lower outer side of the threaded sleeve 11, an active rod 13 rotatably connected to the front side of the support box 6, a handwheel 14 fixedly connected to one end of the front side of the active rod 13, a second bevel gear 15 fixedly connected to one end of the rear side of the active rod 13, the second bevel gear 15 meshing with the first bevel gear 12, and the screw 9 threadedly connected to the inner side of the threaded sleeve 11.

[0020] It should be noted that the support plate 7 is used to provide positioning support for the outer side of the spindle end, the sliding column 8 is used to provide auxiliary positioning for the support plate 7, and the screw 9, in cooperation with the threaded sleeve 11, enables the support plate 7 to move up and down when the threaded sleeve 11 rotates, facilitating the adjustment of the height of the support plate 7. The guide sleeve 10 is used in cooperation with the sliding column 8 to reduce sliding friction. The first bevel gear 12 and the second bevel gear 15 cooperate to change the transmission direction, making it convenient for the operator to control the raising and lowering of the support plate 7 from the side. The handwheel 14 allows the operator to easily rotate the drive rod 13. Through the set support components, the end of the spindle away from the electric chuck 3 can be stably supported by the support plate 7 and the roller 17 on it. The roller 17 can reduce friction when the spindle rotates and does not interfere with the normal machining of the spindle. The screw 9, in cooperation with the threaded sleeve 11, allows the support plate 7 to move up and down within a certain range, making it easy to adapt to spindles with different outer diameters. This makes the positioning structure widely adaptable, and the spindle is not easy to tilt during use, ensuring high machining accuracy.

[0021] The top of the support plate 7 has several grooves 16, and rollers 17 are rotatably connected in the grooves 16. The grooves 16 are used to embed the rollers 17. The contact between the rollers 17 and the outer wall of the spindle can reduce the additional resistance caused by the support when the spindle rotates during machining, avoid the added positioning structure from affecting the spindle rotation, and help ensure machining accuracy.

[0022] A fixing plate 18 is fixedly connected to the bottom inner wall of the support box 6 and the side near the handwheel 14. The active rod 13 passes through the fixing plate 18 and is rotatably connected to its inner side. The fixing plate 18 is used to support the active rod 13, ensuring that its axis does not tilt and improving the service life of the structure.

[0023] The top four corners of the support box 6 are provided with through holes that are adapted to the outer diameter of the guide sleeve 10. The guide sleeve 10 is fixedly connected to the inside of the through holes. The through holes are used to install the guide sleeve 10, which facilitates the positioning of the guide sleeve 10 during installation.

[0024] In practical implementation, the spindle to be processed is lifted horizontally by a crane, with one end close to the electric chuck 3. The electric chuck 3 is activated to clamp and fix one end of the spindle, and the moving seat 5 is moved to a suitable position away from the electric chuck 3. The operator manually rotates the handwheel 14 to drive the drive rod 13 to rotate. The second bevel gear 15 meshes with the first bevel gear 12 to drive the threaded sleeve 11 to rotate. The threaded sleeve 11 engages with the screw 9. Since the screw 9 is restricted from rotating by the support plate 7, the screw 9 will rise and fall within the rotating threaded sleeve 11, thereby driving the support plate 7 to rise and fall. The sliding column 8 slides within the guide sleeve 10 for guidance until the multiple rollers 17 on the support plate 7 contact and press the outer end of the spindle. The control end face positioning structure 4 moves to contact and position one end of the spindle, completing the positioning work before spindle processing.

[0025] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A positioning structure for machining on a drilling and milling machine spindle, characterized in that, Comprising The top side of the base (1) is fixedly connected with a support frame (2), the support frame (2) is provided with an electric chuck (3), the other side of the top of the base (1) is provided with an end face positioning structure (4), the top of the base (1) is provided with a cavity, and the cavity is slidably connected with a moving seat (5); The support assembly comprises a support box (6) fixedly connected to the moving seat (5), the support box (6) is provided with a support plate (7), the bottom corners of the support plate (7) are fixedly connected with slide columns (8), the bottom middle of the support plate (7) is fixedly connected with a screw rod (9), the top corners of the support box (6) are respectively fixedly connected with guide sleeves (10), the slide columns (8) are slidably connected to the inner sides of adjacent guide sleeves (10), the bottom inner wall of the support box (6) is rotatably connected with a threaded sleeve (11), the outer lower side of the threaded sleeve (11) is fixedly connected with a first bevel gear (12), the front side of the support box (6) is rotatably connected with a driving rod (13), the front side of the driving rod (13) is fixedly connected with a hand wheel (14), the rear side of the driving rod (13) is fixedly connected with a second bevel gear (15), the second bevel gear (15) is engaged with the first bevel gear (12), and the screw rod (9) is threadedly connected to the inner side of the threaded sleeve (11).

2. The positioning structure for the main shaft of a drill-milling machine according to claim 1, characterized in that, The top of the support plate (7) is provided with a plurality of grooves (16), and the grooves (16) are rotatably connected with rollers (17).

3. The positioning structure for the main shaft of a drill-milling machine according to claim 2, characterized in that, The bottom inner wall of the support box (6) and the side close to the hand wheel (14) are fixedly connected with a fixed plate (18), and the driving rod (13) penetrates through the fixed plate (18) and is rotatably connected to the inner side thereof.

4. The positioning structure for the main shaft of a drill-milling machine according to claim 3, characterized in that, The top corners of the support box (6) are provided with through holes matched with the outer diameters of the guide sleeves (10), and the guide sleeves (10) are fixedly connected to the inner sides of the through holes. The top of the support plate (7) is provided with a plurality of grooves (16), and the grooves (16) are rotatably connected with rollers (17).

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