Automatic lathe spindle device with self-adaptive clamping mechanism

Abstract

The utility model belongs to the technical field of precision automatic lathe spindles, and particularly relates to a precision automatic lathe spindle device with a self-adaptive clamping mechanism, which comprises a spindle body, a chuck and a pull rod are slidably connected in the spindle body, the chuck is fixedly connected with the pull rod, the precision automatic lathe spindle device further comprises a limiting mechanism, and the limiting mechanism comprises a barrier strip arranged in the chuck. The two ends of the blocking strip penetrate through the inner wall of the chuck and are in sliding connection with the shaft body, the end of the blocking strip is fixedly connected with a sliding column, the sliding column is in sliding connection with the shaft body, the sliding column is in threaded connection with a worm wheel, the worm wheel is rotationally connected with the shaft body, the outer side of the worm wheel is in threaded connection with a worm, and the worm is rotationally connected with the shaft body. After the worm rotates, the sliding column and the blocking strip can move in the axial direction of the shaft body, the distance between the blocking strip and the end face of the shaft body is adjusted, and compared with an existing mode, the maximum insertion depth of a clamped piece can be adjusted conveniently, and applicability is improved.

Description

Technical Field

[0001] This utility model belongs to the field of Swiss-type lathe spindle technology, specifically relating to a Swiss-type lathe spindle device with an adaptive clamping mechanism. Background Technology

[0002] The spindle of a Swiss-type CNC lathe is the core component, used to clamp and drive the workpiece. The spindle is equipped with an adaptive clamping mechanism for clamping the workpiece. This mechanism typically consists of a flexible collet, whose elastic deformation range can accommodate workpieces with varying diameters. During operation, the pull rod is pulled backward, causing the collet to move axially. The outer conical surface of the collet is pressed inward by the inner conical hole of the spindle, thus clamping the workpiece.

[0003] Existing Swiss-type lathe spindle devices with adaptive clamping mechanisms are not convenient for positioning the clamped parts during use, which can easily lead to overtravel of the clamped parts during installation. Although some devices can position the clamped parts, they only use a stop bar to simply limit the clamped parts, making it difficult to adjust the insertion depth of the clamped parts. This makes it difficult to adjust the clamping stroke of the device, resulting in insufficient applicability. Utility Model Content

[0004] The purpose of this invention is to provide a Swiss-type machine spindle device with an adaptive clamping mechanism. The worm gear can rotate to move the slide bar and the stop bar along the shaft axis, adjusting the distance between the stop bar and the end face of the shaft. Compared with the existing method, this makes it easier to adjust the maximum insertion depth of the clamped part and improves applicability.

[0005] The specific technical solution adopted by this utility model is as follows:

[0006] A Swiss-type machine spindle assembly with an adaptive clamping mechanism includes a spindle body, wherein a collet and a pull rod are slidably connected inside the spindle body, the collet and the pull rod are fixedly connected, and the assembly further includes:

[0007] A limiting mechanism is provided on a shaft. The limiting mechanism includes a stop bar disposed inside a chuck. Both ends of the stop bar pass through the inner wall of the chuck and are slidably connected to the shaft. A sliding column is fixedly connected to the end of the stop bar. The sliding column is slidably connected to the shaft. A worm gear is threaded onto the sliding column. The worm gear is rotatably connected to the shaft. A worm is threaded onto the outer side of the worm gear. The worm is rotatably connected to the shaft.

[0008] When the worm rotates, it drives the stop bar to slide along the shaft through the worm wheel and the sliding column, thereby adjusting the distance between the stop bar and the end face of the shaft.

[0009] The end of the slide bar away from the stop bar extends out of the end face of the shaft and has scale lines along the axial direction.

[0010] A slide bar is fixedly connected to the slide column, and a first slide groove is provided inside the shaft body, which slides in conjunction with the slide bar.

[0011] The end of the worm gear has a groove.

[0012] Both ends of the stop bar are fixedly connected to sliders, and a second sliding groove is provided inside the shaft body, which slides in cooperation with the slider.

[0013] The inner wall of the chuck has a strip-shaped hole, and the end of the stop bar passes through the strip-shaped hole through the inner wall of the chuck.

[0014] The technical effects achieved by this utility model are as follows:

[0015] The worm gear in this invention rotates, causing the slide bar and the stop bar to move axially along the shaft body, adjusting the distance between the stop bar and the end face of the shaft body. Compared with the existing method, this makes it easier to adjust the maximum insertion depth of the clamped part and improves applicability.

[0016] The sliding column and stop bar of this utility model can be moved along the axial direction of the shaft body so that the end face of the shaft body is aligned with different positions on the scale line, making it easy for the operator to understand the increase or decrease of the distance between the stop bar and the end face of the shaft body. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a cross-sectional schematic diagram of the central shaft of this utility model;

[0019] Figure 3 This is a cross-sectional schematic diagram of the clamp and pull rod in this utility model;

[0020] Figure 4 This is a cross-sectional schematic diagram of the limiting mechanism and the shaft in this utility model;

[0021] Figure 5 This is a cross-sectional schematic diagram of the baffle and the strip hole in this utility model;

[0022] Figure 6 This is a cross-sectional schematic diagram of the central shaft and the clamp of this utility model;

[0023] Figure 7 This is a cross-sectional schematic diagram of the baffle and the clamped part in this utility model.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 10. Shaft; 11. Chuck; 12. Pull rod; 20. Limiting mechanism; 21. Stop bar; 22. Sliding column; 23. Worm gear; 24. Worm; 31. Scale line; 32. Sliding bar; 33. First slide groove; 34. Groove; 35. Sliding block; 36. Second slide groove; 37. Strip hole. Detailed Implementation

[0026] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific implementations of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0027] like Figures 1 to 7 As shown, a Swiss-type machine spindle device with an adaptive clamping mechanism includes a shaft body 10. A chuck 11 and a pull rod 12 are slidably connected inside the shaft body 10. The chuck 11 and the pull rod 12 are fixedly connected. The device also includes a limiting mechanism 20, which is disposed on the shaft body 10. The limiting mechanism 20 includes a stop bar 21 disposed inside the chuck 11. Both ends of the stop bar 21 pass through the inner wall of the chuck 11 and are slidably connected to the shaft body 10. A sliding column 22 is fixedly connected to the end of the stop bar 21. The sliding column 22 is slidably connected to the shaft body 10. A worm gear 23 is threadedly connected to the sliding column 22. The worm gear 23 is rotatably connected to the shaft body 10. A worm 24 is threadedly connected to the outer side of the worm gear 23. The worm 24 is rotatably connected to the shaft body 10.

[0028] It should be noted that a hydraulic mechanism (not shown in the figure) is fixedly connected to the end of the pull rod 12 away from the chuck 11. The hydraulic mechanism is existing technology and is used to drive the pull rod 12 to move along the shaft 10. It will not be described in detail here. The end of the chuck 11 is provided with several equally spaced long grooves along the axial direction. These long grooves are existing technology and are used to enable the chuck 11 to retract concentrically.

[0029] It should also be noted that the helix angle of the worm 24 is less than or equal to the equivalent friction angle of the meshing surfaces of the worm wheel 23 and the worm 24. The worm wheel 23 and the worm 24 have self-locking properties, that is, the worm 24 can drive the worm wheel 23, but the worm wheel 23 cannot drive the worm 24 in the reverse direction. The inner side of the worm wheel 23 is provided with an internal thread, and the outer side of the slide 22 is provided with an external thread. The internal thread and the external thread are threadedly engaged.

[0030] In this embodiment, after the clamped part is placed in the chuck 11, the stop bar 21 prevents the clamped part from moving further inward, thereby limiting the maximum insertion depth of the clamped part. After the worm 24 rotates along the shaft 10, it drives the worm wheel 23 to rotate along the shaft 10. Since the worm wheel 23 and the slide 22 are threadedly connected, the rotation of the worm wheel 23 drives the slide 22 to move along the shaft 10. The slide 22 drives the stop bar 21 to move along the axis of the shaft 10, thereby increasing or decreasing the distance between the stop bar 21 and the end face of the shaft 10, thereby adjusting the maximum insertion depth of the clamped part and improving applicability. In addition, the worm wheel 23 and the worm 24 have self-locking properties, reducing the possibility of the stop bar 21 sliding in the shaft 10 and improving stability.

[0031] like Figure 4 , Figure 5 and Figure 6 As shown, the end of the sliding column 22 away from the stop bar 21 extends out of the end face of the shaft 10 and has a scale line 31 along the axial direction.

[0032] In this embodiment, during the process of adjusting the distance between the stop bar 21 and the end face of the shaft 10, the slide bar 22 and the stop bar 21 slide together along the shaft 10, causing the end face of the shaft 10 to be aligned with different positions on the scale line 31. By observing the change in the alignment position between the shaft 10 and the scale line 31, the operator can easily understand the increase or decrease in the distance between the stop bar 21 and the end face of the shaft 10, thus improving convenience.

[0033] like Figure 4 and Figure 5 As shown, a slide bar 32 is fixedly connected to the slide column 22, and a first slide groove 33 is provided inside the shaft body 10. The first slide groove 33 is slidably engaged with the slide bar 32.

[0034] In this embodiment, the first groove 33 cooperates with the slide bar 32, making the sliding process of the slide bar 22 along the shaft 10 more stable.

[0035] like Figure 4 , Figure 5 and Figure 6 As shown, a groove 34 is provided at the end of the worm 24.

[0036] It should be noted that groove 34 has an internal hexagonal structure.

[0037] In this embodiment, the groove 34 of the internal hexagonal structure facilitates connection with an internal hexagonal wrench, allowing the operator to rotate the worm gear 24 using the internal hexagonal wrench.

[0038] like Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, both ends of the stop bar 21 are fixedly connected to sliders 35, and the shaft body 10 has a second sliding groove 36 inside, which slides in cooperation with the sliders 35.

[0039] In this embodiment, the second groove 36 cooperates with the slider 35, making the process of the stop bar 21 sliding along the shaft 10 more stable.

[0040] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, a strip-shaped hole 37 is provided on the inner wall of the chuck 11, and the end of the stop bar 21 passes through the strip-shaped hole 37 through the inner wall of the chuck 11.

[0041] It should be noted that the length of the strip hole 37 along the axial direction of the chuck 11 is greater than the length of the stop bar 21 along the axial direction of the chuck 11, and the width of the strip hole 37 is less than the width of the stop bar 21.

[0042] In this embodiment, the end of the stop bar 21 passes through the inner wall of the chuck 11 through the strip hole 37, so that the stop bar 21 can move axially along the chuck 11 in the strip hole 37, thereby preventing the stop bar 21 from colliding with the chuck 11 when it moves along the shaft 10.

[0043] The working principle of this utility model is as follows: the stop bar 21 prevents the clamped part from moving further inward, thus limiting the maximum insertion depth of the clamped part. After rotating the worm gear 24, the worm gear 24 drives the stop bar 21 to move axially along the shaft 10 through the worm wheel 23 and the sliding column 22, thereby increasing or decreasing the distance between the stop bar 21 and the end face of the shaft 10, thereby adjusting the maximum insertion depth of the clamped part and improving its applicability. In addition, the operator can observe the change in the alignment position of the shaft 10 and the scale line 31 to understand the change in the distance between the stop bar 21 and the end face of the shaft 10, which makes it easy to adjust the distance between the stop bar 21 and the end face of the shaft 10, thus making it easy to adjust the maximum insertion depth of the clamped part.

[0044] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A spindle device for a Swiss-type lathe with an adaptive clamping mechanism, characterized in that, The shaft (10) includes a slidably connected collet (11) and a pull rod (12) inside the shaft (10), the collet (11) and the pull rod (12) being fixedly connected, and further includes: A limiting mechanism (20) is provided on a shaft (10). The limiting mechanism (20) includes a stop bar (21) provided inside a chuck (11). Both ends of the stop bar (21) pass through the inner wall of the chuck (11) and are slidably connected to the shaft (10). A sliding column (22) is fixedly connected to the end of the stop bar (21). The sliding column (22) is slidably connected to the shaft (10). A worm wheel (23) is threadedly connected to the sliding column (22). The worm wheel (23) is rotatably connected to the shaft (10). A worm (24) is threadedly connected to the outer side of the worm wheel (23). The worm (24) is rotatably connected to the shaft (10). When the worm (24) rotates, it drives the baffle (21) to slide along the shaft (10) through the worm wheel (23) and the slide column (22) to adjust the distance between the baffle (21) and the end face of the shaft (10).

2. The Swiss-type lathe spindle device with adaptive clamping mechanism according to claim 1, characterized in that: The end of the slide bar (22) away from the stop bar (21) extends out of the end face of the shaft (10) and is provided with scale lines (31) along the axial direction.

3. The Swiss-type lathe spindle device with adaptive clamping mechanism according to claim 1, characterized in that: A slide bar (32) is fixedly connected to the slide column (22), and a first slide groove (33) is provided inside the shaft (10), and the first slide groove (33) slides in cooperation with the slide bar (32).

4. The Swiss-type lathe spindle device with adaptive clamping mechanism according to claim 1, characterized in that: The end of the worm (24) is provided with a groove (34).

5. The Swiss-type lathe spindle device with adaptive clamping mechanism according to claim 1, characterized in that: Both ends of the stop bar (21) are fixedly connected to sliders (35), and the shaft (10) has a second groove (36) inside, which slides in cooperation with the slider (35).

6. The Swiss-type lathe spindle device with adaptive clamping mechanism according to claim 1, characterized in that: The inner wall of the chuck (11) is provided with a strip hole (37), and the end of the stop bar (21) passes through the inner wall of the chuck (11) through the strip hole (37).

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