An automatic chuck jaw repairer

Abstract

This utility model discloses an automatic hydraulic chuck jaw trimmer. The automatic jaw trimmer includes a jaw trimmer main seat, which has a hollow cylindrical part and an outer end cap at one end of the hollow cylindrical part. An inner plug is connected to the other end of the hollow cylindrical part. A main drive component is provided inside the jaw trimmer main seat. The inner end face of the turntable of the main drive component has a spiral groove in the shape of a constant velocity helix. Several driven components that mesh with the spiral groove and can move radially are provided in the space between the inner end face of the turntable and the inner end face of the inner plug. A first through hole is opened on the side wall of the hollow cylindrical part of the jaw trimmer main seat for the driven components to pass through. This utility model has a simple structure, is very convenient to adjust and operate, and the jaw trimmer does not need to be disassembled, enabling fast and efficient jaw trimming. At the same time, the jaw trimmer has a built-in plug, which isolates the inside and outside, and can replace the plug installed at the end of the existing spindle to prevent metal debris from falling into the spindle. It achieves multiple functions in one and saves usage and maintenance costs.

Description

Technical Field

[0001] This utility model belongs to the technical field of mechanical equipment, and particularly relates to CNC lathes, specifically to an automatic hydraulic chuck jaw repairer. Background Technology

[0002] In lathe machining, the three-jaw hydraulic chuck is a commonly used clamping tool. A hydraulic chuck typically has three hard jaws that can move radially along the chuck, each connected to a soft jaw used to hold the workpiece. Over time, wear and tear can create gaps between the hard jaws and the chuck, leading to errors in the clamping of the soft jaws and the workpiece, ultimately affecting the machining accuracy of the workpiece.

[0003] In the prior art, to eliminate this error, the commonly used jaw trimmer is the guide disc type jaw trimmer disclosed in Chinese Utility Model Publication No. CN220480268U. This type of jaw trimmer has disadvantages such as troublesome installation and use, the need for frequent disassembly and assembly, and low efficiency. Moreover, it can only be used with certain specific sizes of chucks and cannot achieve universality. Utility Model Content

[0004] The purpose of this utility model is to address the above-mentioned problems by providing an automatic jaw repairer for hydraulic chucks, which can automatically and quickly correct the jaw gap without disassembly and can be adjusted as needed, thus solving the technical problems of existing jaw repairers being inconvenient to use and requiring frequent disassembly and assembly.

[0005] This utility model is achieved through the following technical solution: an automatic hydraulic chuck jaw trimmer, comprising a jaw trimmer main seat, the main seat having a hollow cylindrical portion and an outer end cap disposed at one end of the hollow cylindrical portion, an inner plug connected to the other end of the hollow cylindrical portion, a main drive component coaxial with the hollow cylindrical portion being disposed between the inner end face of the inner plug and the inner end face of the outer end cap, the main drive component having a circular cap, a turntable and a small cylinder arranged sequentially from the outside to the inside along the axial direction, the outer end face of the circular cap having a turning part for turning the main drive component. Furthermore, the inner end face of the turntable is provided with a spiral groove in the shape of a constant speed spiral. In the space between the inner end face of the turntable and the inner end face of the inner plug, there are also several driven components that mesh with the spiral groove and can move radially. That is, each driven component is provided with intermittent spiral teeth that match the spiral groove. Several first through holes for the driven components to pass through are correspondingly opened on the side wall of the hollow cylindrical part of the main seat of the claw trimmer. The middle part of the outer end cover is provided with a second through hole corresponding to the circular cap of the main drive component, and the outer edge of the outer end cover is provided with a mounting hole.

[0006] The driven component has a cylindrical body, and the inner sidewall of the cylindrical body has a planar cut surface. The planar cut surface is provided with intermittent helical teeth arranged at intervals corresponding to the helical groove of the turntable.

[0007] The outer end face of the driven component is convex arc-shaped, and the driven component has an axial inner hole from the inner end to the outer end. The outer end of the axial inner hole penetrates the outer end face of the driven component. The inner section of the axial inner hole has an internal thread. A steel ball, a spring, and a sealing screw are arranged sequentially inside the axial inner hole. The steel ball passes through the outer end face of the driven component through the combined action of the spring and the sealing screw, and the maximum distance by which the steel ball protrudes from the outer end face of the driven component is 0.2mm~0.3mm.

[0008] The outer diameter of the turntable is equivalent to the inner diameter of the hollow cylindrical part, and the inner end face of the inner plug is provided with a limiting recess that mates with the small cylinder of the main drive component.

[0009] An annular groove is provided on the inner end face of the inner plug, and an annular gasket is installed thereon. The annular gasket contacts the driven component. At the same time, a sleeve that mates with the end of the small cylinder is also provided in the limiting recess of the inner plug.

[0010] The outer end cap edge profile is a closed profile consisting of three alternating arcs and three straight lines.

[0011] The inner plug has a stepped surface on its side wall, and the inner plug is connected to the hollow cylindrical part by a thread. The outer end face of the inner plug has two recesses for screwing the inner plug.

[0012] This utility model has a simple structure and is very convenient to adjust and operate. The claw trimmer does not need to be disassembled, which can achieve fast and efficient claw trimming. At the same time, the claw trimmer comes with a plug to isolate the inside and outside. It can also replace the plug installed at the end of the existing spindle to prevent metal chips from falling into the spindle. It achieves multiple functions in one and saves on usage and maintenance costs. Attached Figure Description

[0013] Figure 1 , Figure 2 This is a three-dimensional view of the entire utility model;

[0014] Figure 3 This is a cross-sectional view of the present invention;

[0015] Figure 4 This is a schematic diagram of the main drive component in this utility model;

[0016] Figure 5 This is a schematic diagram of the driven component in this utility model. Detailed Implementation

[0017] The present invention will be further illustrated below with reference to specific examples and accompanying drawings.

[0018] like Figures 1-5As shown, an automatic jaw repairer for a hydraulic chuck is installed at the end of the spindle of a CNC lathe and at the center of the hydraulic chuck. The hydraulic chuck typically has three hard jaws that can move radially along the chuck. These hard jaws are connected to soft jaws used to clamp the workpiece. The automatic jaw repairer includes a jaw repairer main seat 1, which has a hollow cylindrical portion 11 and an outer end cap 12 at one end of the hollow cylindrical portion 11. An inner plug 13 is connected to the other end of the hollow cylindrical portion 11. A main drive component 2, coaxial with the hollow cylindrical portion 11, is provided between the end face and the inner end face of the outer end cap 12. Along the axial direction, the main drive component 2 is provided with a circular cap 21, a turntable 22, and a small cylinder 23 arranged sequentially from the outside to the inside. Their diameters are in the order that the turntable 22 is larger than the circular cap 21, which is larger than the small cylinder 23. The outer end face of the circular cap 21 is provided with a screwing part 211 for screwing the main drive component. In this embodiment, it is an internal hexagonal recess, but it can also be other non-circular recesses or protrusions. The screw is nut-shaped, making it easy to tighten with simple tools; and the inner end face of the turntable 22 is provided with a spiral groove 221 in the shape of a constant speed spiral. In the space between the inner end face of the turntable 22 and the inner end face of the inner plug 13, there are also several driven parts 3 that mesh with the spiral groove 221 and can move radially. That is, each driven part 3 is provided with intermittent spiral teeth 31 that match the spiral groove 221 and are arranged at intervals. Correspondingly, on the side wall of the hollow cylindrical part 11 of the claw repairer main seat 1, there are also corresponding... The inner end cap 13 has several first through holes 111 through which the driven component 3 passes; the inner end face of the inner end cap 13 has a limiting recess 131 that mates with the small cylinder 23 of the main drive component 2; the outer end cap 12 has a second through hole 121 in the middle that corresponds to the circular cap 21 of the main drive component 2; the outer end cap 12 has a mounting hole 122 at its outer edge; the outer end cap 12 has a closed contour with three arc segments and three straight lines alternating, which matches the internal shape of the hydraulic chuck.

[0019] The driven component 3 has a cylindrical body, and the inner sidewall of the cylindrical body has a planar cut surface 32. The planar cut surface 32 is provided with intermittent helical teeth 31 arranged at intervals corresponding to the helical grooves 221 of the turntable 22. In this utility model, since the helical grooves 221 corresponding to the positions of the three driven components 3 are different, the distance of the helical teeth 31 of the three driven components 3 relative to the axis of the turntable 22 is also different. As long as it is ensured that the radial speed and distance of the three driven components 3 are equal when the main drive component 2 rotates, it is acceptable.

[0020] The outer end face of the driven component 3 is convex arc-shaped, and the driven component 3 has an axial inner hole 301 from the inner end to the outer end. The outer end of the axial inner hole 301 penetrates the outer end face of the driven component 3. The inner section of the axial inner hole 301 has an internal thread 302. A steel ball 33, a spring 34, and a sealing screw 35 are arranged sequentially inside the axial inner hole 301. The spring 34 is a high-tension thick spring, so that the steel ball 33 protrudes out of the outer end face of the driven component 3 through the combined action of the spring 34 and the sealing screw 35. The maximum distance that the steel ball 33 protrudes from the outer end face of the driven component 3 is 0.2mm~0.3mm. After long-term use of the hard claw, the contact surface of one of the hard claws may become uneven due to wear, which may cause a slight deviation in the radial position of the contact of the outer end faces of the three driven components 3 of the claw trimmer (usually within 0.1mm). The steel ball 33 and the spring 34 can eliminate this error, further improving the claw trimming accuracy. For example, without steel balls 33, when a tiny protrusion appears on the contact surface of one of the hard claws, the outer end face of the driven component 3 corresponding to that hard claw contact surface will first contact the hard claw, and then the outer end faces of the other two driven components 3 will not be able to contact the hard claw contact surface. This makes it difficult to accurately correct the position of all the hard claws. However, with the steel ball structure, after one of the uneven hard claw contact surfaces contacts the steel ball 33, it can overcome the tension of the spring 34 and continue to drive the three driven components 3. This ensures that the steel balls of the three driven components 3 all contact the corresponding hard claw contact surfaces, achieving position correction of all the hard claws and ensuring that the machining accuracy is further improved to within 0.01mm.

[0021] The outer diameter of the turntable 22 is equivalent to the inner diameter of the hollow cylindrical part 11, which can further ensure stable and accurate rotation.

[0022] An annular groove 132 is provided on the inner end face of the inner plug 13, and an annular gasket 4 is installed thereon. The annular gasket 4 contacts the driven component 3. At the same time, a sleeve 5 that mates with the end of the small cylinder 23 is also provided in the limiting recess 131 of the inner plug 13. This can avoid wear between the driven component 3, the small cylinder 23 of the main drive component 2 and the inner plug 13 during adjustment. Only the annular gasket 4 and the sleeve 5 are worn. Replacing only the annular gasket 4 and the sleeve 5 can reduce maintenance costs. To further reduce wear and maintain smooth drive, lubricating oil or grease can be applied inside the component.

[0023] The inner plug 13 has a stepped surface 133 on its side wall. The inner plug 13 is connected to the hollow cylindrical part 11 by a thread. The outer end face of the inner plug 13 has two recesses 134 for turning the inner plug. The inner plug can be turned with a special wrench using the two recesses 134.

[0024] In this utility model, the entire claw trimmer is connected and fixed to the hydraulic chuck through the mounting hole 122; the main drive component 2 and the driven component 3 are installed in the internal space formed by the hollow cylindrical part 11 of the claw trimmer main seat 1, the inner plug 13, and the outer end cover 12. The main drive component 2 is axially rotatable and limited by the cooperation between the circular cap 21 and the second through hole 121 of the outer end cover 12 and the cooperation between the small cylinder 23 and the limiting recess 131 of the inner plug 13. The upper and lower limits of the driven component 3 are ensured by the annular gasket 4 on the inner end face of the inner plug and the turntable 22, so that the driven component 3 only moves radially along the claw trimmer main seat 1 and enters and exits through the first through hole 111 of the hollow cylindrical part 11.

[0025] When in use after installation, the main drive component 2 is rotated by the screwing part 211 on the outer end face of the round cap 21. Then, the helical groove 221 on the turntable 22 of the main drive component 2 drives multiple driven components 3 to move radially at the same speed. This causes the outer end of the driven component 3 to pass through the side wall of the hollow cylindrical part 11 and come into contact with the hard claw of the hydraulic chuck, eliminating the gap between the hard claw and the chuck clamping groove, thereby achieving the effect of correcting the position of the hard claw of the chuck.

[0026] This utility model has a simple structure and is very convenient to adjust and operate. The claw trimmer does not need to be disassembled, which can achieve fast and efficient claw trimming. At the same time, the claw trimmer comes with a plug to isolate the inside and outside. It can also replace the plug installed at the end of the existing spindle to prevent metal chips from falling into the spindle. It achieves multiple functions in one and saves on usage and maintenance costs.

[0027] The above embodiments are merely preferred embodiments of the present utility model and are only used to explain the present utility model, not to limit the present utility model. Any changes, substitutions, combinations, simplifications, modifications, etc., made by those skilled in the art without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. An automatic jaw trimmer for hydraulic chucks, characterized in that: The automatic claw trimmer includes a claw trimmer main seat, which has a hollow cylindrical portion and an outer end cap at one end of the hollow cylindrical portion. An inner plug is connected to the other end of the hollow cylindrical portion. A main drive component, coaxial with the hollow cylindrical portion, is disposed between the inner end face of the inner plug and the inner end face of the outer end cap. The main drive component has a circular cap, a turntable, and a small cylinder arranged sequentially from the outside to the inside along the axial direction. The outer end face of the circular cap has a turning part for turning the main drive component, and the inner end face of the turntable has an evenly spaced part. The spiral groove is shaped like a high-speed helix. In the space between the inner end face of the turntable and the inner end face of the inner plug, there are several driven components that mesh with the spiral groove and can move radially. That is, each driven component is provided with intermittent spiral teeth that match the spiral groove. Several first through holes are opened on the side wall of the hollow cylindrical part of the main seat of the claw trimmer for the driven components to pass through. The middle part of the outer end cover is provided with a second through hole corresponding to the circular cap of the main drive component, and the outer edge of the outer end cover is provided with a mounting hole.

2. The hydraulic chuck automatic jaw repair device according to claim 1, characterized in that: The driven component has a cylindrical body, and the inner sidewall of the cylindrical body has a planar cut surface. The planar cut surface is provided with intermittent helical teeth arranged at intervals corresponding to the helical groove of the turntable.

3. An automatic hydraulic chuck jaw repairer according to claim 1 or 2, characterized in that: The outer end face of the driven component is convex arc-shaped, and the driven component has an axial inner hole from the inner end to the outer end. The outer end of the axial inner hole penetrates the outer end face of the driven component. The inner section of the axial inner hole has an internal thread. A steel ball, a spring, and a sealing screw are arranged sequentially inside the axial inner hole. The steel ball passes through the outer end face of the driven component through the combined action of the spring and the sealing screw, and the maximum distance by which the steel ball protrudes from the outer end face of the driven component is 0.2mm~0.3mm.

4. The hydraulic chuck automatic jaw repair device according to claim 1, characterized in that: The outer diameter of the turntable is equivalent to the inner diameter of the hollow cylindrical part, and the inner end face of the inner plug is provided with a limiting recess that mates with the small cylinder of the main drive component.

5. The hydraulic chuck automatic jaw repair device according to claim 1, characterized in that: An annular groove is provided on the inner end face of the inner plug, and an annular gasket is installed thereon. The annular gasket contacts the driven component. At the same time, a sleeve that mates with the end of the small cylinder is also provided in the limiting recess of the inner plug.

6. The hydraulic chuck automatic jaw repair device according to claim 1, characterized in that: The outer end cap edge profile is a closed profile consisting of three alternating arcs and three straight lines.

7. An automatic hydraulic chuck jaw trimmer according to claim 1, 5, or 6, characterized in that: The inner plug has a stepped surface on its side wall, and the inner plug is connected to the hollow cylindrical part by a thread. The outer end face of the inner plug has two recesses for screwing the inner plug.

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