Numerically controlled lathe sleeve type small spindle tailstock
By designing a sleeve-type small spindle tailstock for CNC lathes, and using a sleeve structure in conjunction with a center cylinder, the problem of difficult disassembly of solid centers was solved, assembly accuracy and waterproof performance were improved, and accessory configuration costs were reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 安徽卓朴智能装备股份有限公司
- Filing Date
- 2025-07-22
- Publication Date
- 2026-07-03
AI Technical Summary
There is a problem that when the solid center and the small spindle are tightly fitted together, the solid center is not easy to detach from the small spindle.
A sleeve-type tailstock for CNC lathes was designed, which uses a sleeve structure and a center cylinder to achieve the disassembly of the solid center through an external thread section and a center disassembly nut. The guide rail structure of hard rail and linear rail is combined to improve assembly accuracy and waterproof performance.
It enables convenient disassembly of the top, improves assembly accuracy and waterproof performance, and reduces the cost of accessory configuration.
Smart Images
Figure CN224444617U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of CNC machine tools, and in particular to a sleeve-type small spindle tailstock for CNC lathes. Background Technology
[0002] In rotary machining tools, such as lathes and cylindrical grinders, the headstock and tailstock are arranged facing each other. The rotary machining tool is configured to support a rotating object and operates between the headstock and tailstock. In the tailstock, a shaft hole passes through the main body in the front-to-back direction. The tailstock spindle is fitted into the shaft hole and can move back and forth. The front end of the tailstock spindle points towards the headstock and is arranged concentrically with the headstock's main spindle. A center point can be concentrically attached to the front end of the tailstock spindle, which is non-rotatable relative to the main body.
[0003] In this structure, the center is a dead center. When machining a workpiece, the workpiece rotates while the center and sleeve remain stationary. The workpiece rotates at high speed relative to the tailstock center, which requires high-quality material for the center. Usually, hard alloy is inlaid at the center to prevent wear. In addition, depending on the workpiece material and the characteristics of the workpiece center hole, a special live center is usually required instead, which increases the configuration cost of accessories.
[0004] If a solid center and a small spindle are used in combination, the solid center will be difficult to detach from the small spindle because the solid center and the small spindle are tightly fitted together. Summary of the Invention
[0005] The purpose of this invention is to provide a sleeve-type tailstock for a CNC lathe, which solves the problem that in existing systems where the solid center and the small spindle are tightly fitted together, the solid center is not easy to detach from the small spindle during disassembly.
[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: a sleeve-type small spindle tailstock for CNC lathes, including a guide rail, a tailstock structure that can slide along the guide rail, and an external structure for cooperating with the saddle on one side of the tailstock structure; a center cavity is provided on the upper part of the tailstock structure, and a sleeve structure that can move along the X-axis along the inner wall of the center cavity is provided inside the center cavity; a left end cover of the cavity adapted to the left end opening of the center cavity is provided on the left outer wall of the tailstock structure; the left end of the sleeve structure is located outside the center cavity; the right side of the tailstock structure... The outer wall is equipped with a center cylinder, the piston of which extends into the center cavity and connects to the tail of the sleeve structure; the left end of the sleeve structure is equipped with a sleeve left end cap that matches its left end opening; the sleeve structure is equipped with a rotatable small spindle, and the sleeve structure is also equipped with a bearing assembly that matches the small spindle; the small spindle is equipped with a solid center that can rotate with it, and the left tip of the solid center extends to the outside of the sleeve left end cap; the end of the solid center located outside the sleeve left end cap is equipped with an external thread section, and the external thread section is equipped with a detachable center removal nut.
[0007] Furthermore, the tail structure includes a lower tail body and an upper tail body. The upper tail body is detachably mounted on the lower tail body, and the external structure is mounted on the left outer wall of the upper tail body.
[0008] Furthermore, the lower guide rail includes parallel rigid rails and linear rails. The rigid rails are provided with grooves, and the front end of the bottom of the platform tail is provided with a slide rail that matches the grooves. The linear rails are provided with sliders, and the rear end of the bottom of the platform tail is provided on the sliders.
[0009] Furthermore, the top of the upper body of the platform is provided with a top cylindrical body, the top cavity is the cavity of the top cylindrical body, the left end of the top cylindrical body is provided with a left end cap of the cavity, the right end of the cavity is provided with a right end cap of the cavity, and the top cylinder is provided on the right end cap of the cavity; the end faces of the left end cap of the cavity, the right end cap of the cavity and the top cylindrical body are all provided with sealing rubber rings; the right end of the sleeve structure is provided with a sleeve right end cap that matches it; the top of the piston part of the top cylinder is mounted on the sleeve right end cap; the sleeve right end cap is provided with a top cylinder locking nut that matches the piston part of the top cylinder.
[0010] Furthermore, the bearing assembly includes a front bearing assembly disposed at the front end of the small spindle and an end bearing assembly disposed at the end of the small spindle; the front bearing assembly includes a front bearing, with front inner spacers for positioning its inner ring on both the left and right sides of the front bearing, and a front outer spacer for positioning its outer ring on the right side of the front bearing; the right end of the left end cap of the sleeve is connected to the left outer ring of the front bearing; the end bearing assembly includes an end bearing group, which consists of three bearings arranged side by side, with an upper right spacer and a lower right spacer on the right side of the end bearing group, the upper right spacer for positioning the outer ring of the end bearing group, and the lower right spacer for positioning the inner ring of the end bearing group; the left end of the end bearing group is connected to the side wall of the small spindle; the lower right spacer is located outside the end bearing group; a water storage tank is provided around the outer side of the front inner spacer located on the left side of the front bearing, the inner side of the left end cap of the sleeve and the outer side of the front inner spacer located on the left side of the front bearing are in clearance fit, and a water outlet hole connected to the water storage tank is provided at the bottom of the outer side wall of the left end cap of the sleeve.
[0011] The beneficial effects of this utility model are as follows: The end of the solid center located outside the left end cover of the sleeve is provided with an external thread section, and the external thread section is provided with a detachable center removal nut. By tightening the center removal nut in conjunction with the left end cover of the sleeve, the solid center can be pulled out from the small spindle and disengaged from the tight fit. This solves the problem that in the existing solid center and small spindle are tightly fitted together, it is not easy to disengage the solid center from the small spindle when disassembling.
[0012] The tail structure includes a split structure of lower tail body and upper tail body, which makes assembly and precision adjustment easier.
[0013] The combination of rigid rails and linear rails can leverage the advantages of both, avoiding the problems of high cost and poor rigidity of single linear rails, and slow speed and poor precision of single rigid rails.
[0014] The inclusion of a water storage tank and a water outlet enhances waterproofing and prevents water from entering the bearing, thus ensuring its stability.
[0015] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. Attached Figure Description
[0016] Figure 1 This is a schematic block diagram of the structure of this utility model.
[0017] Figure 2 This is a cross-sectional structural diagram of the present invention.
[0018] Figure 3 for Figure 2 A magnified view of a portion of position A in the diagram.
[0019] In the diagram, 1. Linear rail, 2. Hardened rail, 3. Lower body of the platform tail, 4. Upper body of the platform tail, 5. External structure, 6. Center cavity, 7. Left end cover of the cavity, 8. Right end cover of the cavity, 9. Center cylinder, 10. Left end cover of the sleeve, 11. Right end cover of the sleeve, 12. Solid center, 13. External thread section, 14. Center disassembly nut, 15. Slide groove, 16. Locking nut of the center cylinder, 17. Center cylindrical body, 18. Front bearing, 19. Front inner spacer, 20. Front outer spacer, 21. End bearing assembly, 22. Upper right spacer, 23. Lower right spacer, 24. Water storage tank, 25. Water outlet, 26. Mounting hole, 27. Small spindle, 28. Sleeve structure. Detailed Implementation
[0020] Examples, such as Figures 1 to 3The CNC lathe shows a sleeve-type small spindle 27 tailstock, including a guide rail, a sliding tailstock structure on the guide rail, an external structure 5 for cooperating with the saddle on one side of the tailstock structure, a center cavity 6 on the upper part of the tailstock structure, a sleeve structure 28 that can move along the X-axis along the inner wall of the cavity 6, a left end cover 7 of the cavity adapted to the left end opening of the center cavity 6 on the left outer wall of the tailstock structure, the left end of the sleeve structure 28 is located outside the center cavity 6, and a center cylinder 9 is located on the right outer wall of the tailstock structure, the piston part of the center cylinder 9 extending... The sleeve extends into the center cavity 6 and connects to the tail of the sleeve structure 28; the left end of the sleeve structure 28 is provided with a sleeve left end cap 10 that matches its left end opening; a rotatable small spindle 27 is provided inside the sleeve structure 28, and a bearing assembly that matches the small spindle 27 is also provided inside the sleeve structure 28; a solid center 12 that can rotate with it is provided on the small spindle 27, and the left tip of the solid center 12 extends to the outside of the sleeve left end cap 10; an external thread section 13 is provided at the end of the solid center 12 located outside the sleeve left end cap 10, and a detachable center removal nut 14 is provided on the external thread section 13.
[0021] The tail structure includes a lower tail body 3 and an upper tail body 4. The upper tail body 4 is detachably mounted on the lower tail body 3, and the external structure 5 is mounted on the left outer wall of the upper tail body 4.
[0022] The lower guide rail includes a rigid rail 2 and a linear rail 1 arranged in parallel. The rigid rail 2 is provided with a slide groove 15, and the front end of the bottom of the platform tail 3 is provided with a slide rail that matches the slide groove 15. The linear rail 1 is provided with a slider, and the rear end of the bottom of the platform tail 3 is provided on the slider.
[0023] The top of the upper body 4 at the tail is provided with a top cylindrical body 17, the top cavity 6 is the cavity of the top cylindrical body 17, the left end of the top cylindrical body 17 is provided with a left end cover 7, the right end is provided with a right end cover 8, and the top cylinder 9 is provided on the right end cover 8; the end faces of the left end cover 7, the right end cover 8 and the top cylindrical body 17 are all provided with sealing rubber rings; the right end of the sleeve structure 28 is provided with a sleeve right end cover 11 that is adapted to it; the top end of the piston part of the top cylinder 9 is mounted on the sleeve right end cover 11; the sleeve right end cover 11 is provided with a top cylinder locking nut 16 that is adapted to the piston part of the top cylinder 9.
[0024] The bearing assembly includes a front bearing 18 assembly disposed at the front end of the small spindle 27, and an end bearing assembly 21 disposed at the end of the small spindle 27. The front bearing 18 assembly includes a front bearing 18, with front inner spacers 19 on both the left and right sides for positioning its inner ring, and a front outer spacer 20 on the right side for positioning its outer ring. The right end of the sleeve left end cap 10 is connected to the left outer ring of the front bearing 18. The end bearing assembly 21 includes an end bearing assembly 21, which consists of three bearings arranged side by side. The side is provided with an upper right spacer 22 and a lower right spacer 23. The upper right spacer 22 is used to position the outer ring of the end bearing assembly 21, and the lower right spacer 23 is used to position the inner ring of the end bearing assembly 21. The left end of the end bearing assembly 21 is connected to the side wall of the small spindle 27. The lower right spacer 23 is located outside the end bearing assembly 21. A water storage tank 24 is provided around the outer side of the front inner spacer 19 located on the left side of the front bearing 18. The inner side of the left end cover 10 of the sleeve is in clearance fit with the outer side of the front inner spacer 19 located on the left side of the front bearing 18. A water outlet hole 25 connected to the water storage tank 24 is provided at the bottom of the outer side wall of the left end cover 10 of the sleeve.
[0025] The small spindle 27 has a mounting hole 26, which extends from the left end face of the small spindle 27 into the small spindle 27; the right end of the small spindle 27 is interference-fitted into the mounting hole 26; the mounting hole 26, the small spindle 27, and the solid center 12 are coaxially arranged.
[0026] In the description of this utility model, it should be understood that the terms "center," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Additionally, the term "comprising" and any variations thereof are intended to cover non-exclusive inclusion.
[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0028] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments. Unless the context clearly indicates otherwise, the singular forms “a” and “an” as used herein are also intended to include the plural. It should also be understood that the terms “comprising” and / or “including” as used herein specify the presence of the stated features, integers, steps, operations, units, and / or components, without excluding the presence or addition of one or more other features, integers, steps, operations, units, components, and / or combinations thereof.
[0029] The above embodiments are not intended to limit the scope of the invention, but rather to illustrate it. The scope of this invention is determined by the scope of the claims, not by the description itself, and should be interpreted as including all differences within the equivalent scope of this invention. Any non-substantial improvements made using the inventive concept and technical solution of this invention; or the direct application of the above-mentioned concept and technical solution of this invention to other situations without modification, are all within the protection scope of this invention.
Claims
1. A sleeve-type tailstock for a CNC lathe, comprising a guide rail, a sliding tailstock structure mounted on the guide rail, and an external structure for engaging with a saddle on one side of the tailstock structure; characterized in that: The upper part of the tail structure is provided with a center cavity, and a sleeve structure that can move along the inner wall of the cavity in the X-axis is provided inside the center cavity. The left outer wall of the tail structure is provided with a left end cap that matches the left opening of the center cavity. The left end of the sleeve structure is located outside the center cavity. The right outer wall of the tail structure is provided with a center cylinder, and the piston part of the center cylinder extends into the center cavity and connects with the tail of the sleeve structure. The left end of the sleeve structure is provided with a left end cap that matches its left opening. A rotatable small spindle is provided inside the sleeve structure, and a bearing assembly that matches the small spindle is also provided inside the sleeve structure. A solid center that can rotate with it is provided on the small spindle, and the left tip of the solid center extends outside the left end cap of the sleeve. The end of the solid center located outside the left end cap of the sleeve is provided with an external thread section, and the external thread section is provided with a detachable center removal nut.
2. The CNC lathe sleeve type small spindle tailstock according to claim 1, characterized in that: The tail structure includes a lower tail body and an upper tail body. The upper tail body is detachably mounted on the lower tail body, and the external structure is mounted on the left outer wall of the upper tail body.
3. The CNC lathe sleeve type small spindle tailstock according to claim 2, characterized in that: The lower guide rail includes parallel rigid rails and linear rails. The rigid rails are provided with grooves, and the front end of the bottom of the platform tail is provided with a slide rail that matches the grooves. The linear rails are provided with sliders, and the rear end of the bottom of the platform tail is provided on the sliders.
4. The CNC lathe sleeve type main spindle tailstock according to claim 2 or 3, characterized in that: The top of the upper body of the platform is equipped with a top cylindrical body, and the top cavity is the cavity of the top cylindrical body. The left end of the top cylindrical body is equipped with a left end cap, and the right end is equipped with a right end cap. The top cylinder is mounted on the right end cap. Sealing rubber rings are provided on the end faces of the left end cap, the right end cap, and the top cylindrical body. The right end of the sleeve structure is equipped with a matching right end cap. The top of the piston part of the top cylinder is mounted on the right end cap. The right end cap of the sleeve is equipped with a top cylinder locking nut that matches the piston part of the top cylinder.
5. The CNC lathe sleeve type small spindle tailstock according to claim 4, characterized in that: The bearing assembly includes a front bearing assembly located at the front end of the small spindle and an end bearing assembly located at the end of the small spindle. The front bearing assembly includes a front bearing, with front inner spacers for positioning its inner ring on both the left and right sides of the front bearing, and a front outer spacer for positioning its outer ring on the right side of the front bearing. The right end of the left end cap of the sleeve is connected to the left outer ring of the front bearing. The end bearing assembly includes an end bearing group, which consists of three bearings arranged side by side. The right side of the end bearing group has an upper right spacer and a lower right spacer. The upper right spacer is used to position the outer ring of the end bearing group, and the lower right spacer is used to position the inner ring of the end bearing group. The left end of the end bearing group is connected to the side wall of the small spindle. The lower right spacer is located outside the end bearing group. A water storage tank is arranged around the outer side of the front inner spacer located on the left side of the front bearing. The inner side of the left end cap of the sleeve and the outer side of the front inner spacer located on the left side of the front bearing have a clearance fit. The bottom of the outer side wall of the left end cap of the sleeve has a water outlet hole that communicates with the water storage tank.