Special lathe fixture for swing arm lining shell

Abstract

The utility model discloses a special lathe fixture for a swing arm lining shell, which comprises a top connecting joint and a mounting flange base which are respectively mounted on a lathe tailstock and a spindle, a mandrel base is fixedly arranged on the mounting flange base, the mandrel base is detachably connected with a lining mandrel in an inserted manner, and a limiting buffer block is mounted at the outer end of the lining mandrel. During clamping, the lining mandrel extends into the outer shell to provide radial supporting, the limiting buffer block abuts against the inner cavity, the tail frame drives the top connecting joint to conduct axial pressing, the coaxiality of one thread is guaranteed through inner supporting and outer pressing, the feeding efficiency is improved through the segmented detachable structure, the thin wall is protected through the elastic adaptive design, and the requirement for high-precision and high-efficiency machining is met.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts processing, specifically to a lathe-specific fixture for a swing arm inner liner shell. Background Technology

[0002] The inner shell of the swing arm is a typical thin-walled shell part. Its structure presents an asymmetrical shape with "one end closed and one end open". After processing, it must meet the high-precision coaxiality requirement of 0.01mm (1 mil) between the inner and outer rings, and at the same time, it must avoid deformation of the thin-walled structure due to clamping stress.

[0003] In the existing technology, the lathe clamping fixtures for this part have the following main defects:

[0004] External clamping fixture: It only clamps axially through both ends (closed end and open end) of the outer shell, without providing radial support for the thin-walled inner ring. During machining, the outer shell is prone to radial deformation due to cutting force, resulting in the coaxiality of the inner and outer rings exceeding the tolerance.

[0005] Low loading efficiency: The installation and support components of existing fixtures are mostly integrated or non-detachable connection structures, which makes disassembly and assembly operations cumbersome. A lot of time is required to adjust the fit between the fixture and the parts during loading, which greatly reduces the loading efficiency in mass production and cannot keep up with the pace of high-efficiency processing.

[0006] The defects of the existing fixtures mentioned above result in the machining accuracy and production efficiency of the swing arm inner liner shell failing to meet actual production needs. Therefore, there is an urgent need for a special fixture that is adapted to its structural characteristics and has the functions of high-precision positioning, low-stress clamping and convenient loading. Utility Model Content

[0007] This utility model aims to solve one of the technical problems existing in the prior art.

[0008] This application provides a lathe-specific fixture for a swing arm inner liner shell, including a central support and a top connecting joint. One end of the central support is fixed on the lathe spindle, and the other end is used to extend into the swing arm inner liner shell. The top connecting joint is used to fix the closed end of the swing arm inner liner shell from both the inside and outside.

[0009] The free end of the central support is elastic, and when the top connecting joint moves axially to press against the inner end of the swing arm liner, it tightens the inner end of the swing arm liner.

[0010] The central support consists of a mounting part and a support part. The mounting part is mounted on the lathe spindle by fasteners. One end of the support part is detachably connected to the mounting part, and the other end is elastic.

[0011] The mounting section includes a mounting flange base, an inner support chuck, and a spindle base that are sequentially inserted and mated along the axial direction. The mounting flange base is fixed to the lathe spindle with screws, and the mounting section has a mounting groove for insertion with the spindle base.

[0012] The inner support clamp is made of elastic material, and the outer periphery has an annular protrusion to support the open end face of the inner shell of the swing arm.

[0013] The top of the inner support chuck has a mounting hole, and the bottom of the spindle base has a sleeve for insertion and mating with the mounting hole.

[0014] A screw hole is opened at the inner end of the mandrel base, and a through hole is opened along the central axis of the inner support chuck. The mandrel base and the inner support chuck are fixed to each other by connecting the screw through the through hole and the screw hole.

[0015] The support part includes an inner liner mandrel and a limiting buffer block. The mounting groove is located at one end of the inner liner mandrel and is inserted into the mandrel base. The limiting buffer block is inserted at the outer end of the inner liner mandrel.

[0016] The limiting buffer block includes an integrally formed insertion section and a support section. The insertion section is inserted into the inner cavity of the free end of the inner liner spindle, and the support section is used to support the inner end of the inner cavity of the swing arm inner liner shell.

[0017] The support section is bullet-shaped.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. Precise control of coaxiality: The central support (inner liner spindle) extends into the inner shell of the swing arm to provide radial support. Combined with the axial clamping of the top connecting joint, it forms a "inner support + outer pressure" positioning structure, which replaces the traditional external clamping method that only clamps axially. This effectively avoids radial deformation of the shell caused by cutting force, and ensures that the coaxiality of the inner and outer rings stably meets the high precision requirement of 0.01mm (1 mil).

[0020] 2. Significantly improves loading efficiency: The mounting part of the fixture (mounting flange base, mandrel base) and the support part (inner mandrel) adopt a segmented and detachable plug-in structure. During loading, there is no need for complicated disassembly and assembly operations. Only quick docking of each component is required to complete the matching of the fixture and the part, which significantly shortens the loading time in mass production and is adapted to the high-efficiency processing rhythm.

[0021] 3. Low-stress protection for thin-walled structures: The elastic structure at the free end of the central support and the elastic material of the inner support clamp can adaptively conform to the inner ring of the outer shell during clamping, avoiding local stress concentration caused by rigid contact. At the same time, it buffers the clamping impact force, effectively preventing plastic deformation or surface scratches of the thin-walled outer shell, thus improving the product qualification rate. Attached Figure Description

[0022] Figure 1This is a perspective view of the lathe-specific fixture for the swing arm inner liner shell in use, as described in this application embodiment.

[0023] Figure 2 This is a top view of the lathe-specific fixture for the swing arm inner liner housing in the embodiments of this application;

[0024] Figure 3 This is a three-dimensional structural diagram of the lathe-specific fixture for the inner shell of the swing arm in this embodiment of the application.

[0025] Figure Labels

[0026] 1-Mounting flange base, 2-Inner support chuck, 3-Mandrel base, 4-Inner liner mandrel, 5-Limit buffer block, 6-Top connecting joint, 100-Lathe spindle, 200-Lathe tailstock, 300-Swing arm inner liner housing. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0028] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0029] The lathe-specific fixture for the swing arm inner liner shell provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0030] Example 1:

[0031] This application provides a lathe-specific fixture for a swing arm inner liner shell, including a central support and a top connecting joint 6. One end of the central support is fixed on the lathe spindle 100, and the other end is used to extend into the swing arm inner liner shell 300, and cooperates with the top connecting joint 6 to fix the closed end of the swing arm inner liner shell 300 from the inside and outside.

[0032] In this embodiment of the application, the free end of the central support member is elastic (rubber) and tightens the inner end of the swing arm inner liner 300 when the top connecting joint 6 moves axially to press the swing arm inner liner 300.

[0033] In this embodiment of the present application, the central support includes an mounting portion and a support portion. The mounting portion is mounted on the lathe spindle 100 by fasteners. One end of the support portion is detachably connected to the mounting portion, and the other end is elastic.

[0034] like Figures 1 to 3 As shown, due to the above structure, the central support can be supported from inside the swing arm inner shell 300. Combined with the external clamping of the top connecting joint 6 fixed on the lathe tailstock 200, the "internal support + external pressure" bidirectional positioning of the closed end of the shell is achieved. At the same time, the elastic tensioning structure of the free end of the central support can adaptively fit the inner ring of the shell as the axial clamping action of the top connecting joint 6 is performed, effectively eliminating the gap between the inner ring and the support, greatly improving the radial positioning accuracy of the shell, and solving the problem of coaxiality deviation caused by the inability of traditional external clamping fixtures to constrain the inner ring.

[0035] Example 2:

[0036] In this embodiment, in addition to the structural features of the aforementioned embodiments, the mounting part includes a mounting flange base 1, an inner support chuck 2, and a spindle base 3 that are sequentially inserted and fitted along the axial direction. The mounting flange base 1 is fixed to the lathe spindle 100 by screws, and a mounting groove is provided on the mounting part for insertion with the spindle base 3.

[0037] In this embodiment of the application, the inner support clamp 2 is made of elastic material, and an annular protrusion is provided on the outer periphery to support the open end face of the inner liner shell 300 of the swing arm.

[0038] like Figures 2 to 3 As shown, due to the above structure, the segmented plug-in design of the installation part simplifies the disassembly and assembly process of the clamp, making it easy to quickly replace parts for different specifications of the swing arm inner liner shell 300; while the elastic material inner support clamp 2 and the annular protrusion can not only stably support the open end face of the shell, but also buffer the clamping stress through their own elasticity to avoid deformation of the end face of the shell due to hard contact, and further constrain the radial position of the shell, forming a multi-dimensional positioning of "two ends + inner ring" with the central support.

[0039] Example 3:

[0040] In this embodiment, in addition to the structural features of the aforementioned embodiments, the inner support clamp 2 has a mounting hole at its top, and the mandrel base 3 has a sleeve at its bottom for insertion and engagement with the mounting hole.

[0041] In this embodiment of the application, a screw hole is provided at the inner end of the mandrel base 3, and a through hole is provided along the central axis of the inner support chuck 2. The mandrel base 3 and the inner support chuck 2 are fixed to each other by screws passing through the through hole and connecting to the screw hole.

[0042] like Figures 2 to 3 As shown, due to the above structure, the "plug-in + screw locking" combination connection between the spindle base 3 and the inner support chuck 2 not only ensures the ease of assembly between components, but also enhances the overall rigidity of the installation part, avoiding relative offset between the spindle base 3 and the inner support chuck 2 during processing; at the same time, this connection structure keeps the installation reference of the central support component and the lathe spindle 100 highly coaxial, providing a stable reference guarantee for the accuracy of subsequent inner support positioning.

[0043] Example 4:

[0044] In this embodiment, in addition to the structural features of the aforementioned embodiments, the support portion includes an inner lining mandrel 4 and a limiting buffer block 5. The mounting groove is provided at one end of the inner lining mandrel 4 and is inserted into the mandrel base 3, and the limiting buffer block 5 is inserted at the outer end of the inner lining mandrel 4.

[0045] In this embodiment of the application, the limiting buffer block 5 includes an integrally formed insertion section and a support section. The insertion section is inserted into the inner cavity of the free end of the inner liner spindle 4, and the support section is used to support the inner end of the inner cavity of the swing arm inner liner shell 300.

[0046] In this embodiment of the application, the support segment is bullet-shaped.

[0047] like Figures 2 to 3 As shown, due to the above structure, the insertion and connection between the inner mandrel 4 and the mandrel base 3 simplifies the assembly and disassembly of the support part, meeting the high-efficiency requirements of batch processing; while the bullet-shaped limiting buffer block 5 support section can not only increase the contact area with the inner end of the outer shell cavity and improve the stability of axial positioning, but also buffer the clamping impact force through the arc contour to avoid scratching the inner ring of the outer shell; at the same time, the segmented structure of the limiting buffer block 5 makes it easy to flexibly replace according to the inner cavity size of the outer shell, improving the adaptability of the fixture.

[0048] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0049] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A lathe-specific fixture for a swing arm inner liner shell, characterized in that, It includes a central support and a top connecting joint. One end of the central support is fixed on the lathe spindle, and the other end is used to extend into the inner shell of the swing arm liner. The top connecting joint is used to fix the closed end of the inner shell of the swing arm liner from both the inside and outside.

2. The lathe-specific fixture for a swing arm inner liner shell according to claim 1, characterized in that, The free end of the central support is elastic, and when the top connecting joint moves axially to press against the inner end of the swing arm liner, it tightens the inner end of the swing arm liner.

3. A lathe-specific fixture for a swing arm inner liner shell according to claim 2, characterized in that, The central support component includes an mounting part and a support part. The mounting part is mounted on the lathe spindle by fasteners. One end of the support part is detachably connected to the mounting part, and the other end is elastic.

4. A lathe-specific fixture for a swing arm inner liner shell according to claim 3, characterized in that, The mounting part includes a mounting flange base, an inner support chuck, and a mandrel base that are sequentially inserted and mated along the axial direction. The mounting flange base is fixed to the lathe spindle by screws, and the mounting part has a mounting groove for insertion with the mandrel base.

5. A lathe-specific fixture for a swing arm inner liner shell according to claim 4, characterized in that, The inner support clamp is made of elastic material, and its outer periphery has an annular protrusion to support the open end face of the inner shell of the swing arm.

6. A lathe-specific fixture for a swing arm inner liner shell according to claim 4, characterized in that, The inner support clamp has a mounting hole at the top, and the mandrel base has a sleeve at the bottom for insertion and mating with the mounting hole.

7. A lathe-specific fixture for a swing arm inner liner shell according to claim 6, characterized in that, The mandrel base has a screw hole at its inner end, and the inner support chuck has a through hole along its central axis. The mandrel base and the inner support chuck are fixed together by screws passing through the through hole and connecting to the screw hole.

8. A lathe-specific fixture for a swing arm inner liner shell according to claim 4, characterized in that, The support portion includes an inner lining mandrel and a limiting buffer block. The mounting groove is located at one end of the inner lining mandrel and is inserted into the mandrel base. The limiting buffer block is inserted at the outer end of the inner lining mandrel.

9. A lathe-specific fixture for a swing arm inner liner shell according to claim 8, characterized in that, The limiting buffer block includes an integrally formed insertion section and a support section. The insertion section is inserted into the inner cavity of the free end of the inner liner spindle, and the support section is used to support the inner end of the inner cavity of the swing arm inner liner shell.

10. A lathe-specific fixture for a swing arm inner liner shell according to claim 9, characterized in that, The support section is bullet-shaped.

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