Tool structure for machining core shaft of molecular pump

Abstract

The utility model relates to the technical field of molecular pump machining, in particular to a tool structure for machining a core shaft of a molecular pump, which comprises a mounting seat used for being connected with a machine tool rotating shaft, a base is arranged at the outer side end of the mounting seat, a tool seat used for installing and fixing the core shaft is arranged at the outer side end of the base, and the tool seat comprises a fixed part and a movable part which are oppositely arranged. The movable part can move close to or far away from the fixed part, a displacement locking structure is arranged between the movable part and the base, symmetrical semicircular groove holes are formed in the adjacent sides of the movable part and the fixed part respectively, a tool groove with a circular cross section outline is formed in the connecting position after the movable part and the fixed part are spliced, and the tool groove is used for rigidly attaching and wrapping the mandrel. The tool structure is beneficial for solving the problems that some tool structures for machining molecular pump mandrels at present are large in tool loading pressure, tedious to disassemble and assemble and time-consuming and labor-consuming.

Description

Technical Field

[0001] The utility model relates to the technical field of molecular pump processing, in particular to a tooling structure used for processing a molecular pump core shaft. Background Art

[0002] A molecular pump uses a high-speed rotating rotor to transfer momentum to gas molecules, giving them a directional velocity, which compresses them and drives them toward the exhaust port for extraction by the front stage. During operation, the rotor speed of the molecular pump reaches 20,000 rpm, placing high demands on the machining accuracy of the molecular pump's core shaft.

[0003] The core shaft of the molecular pump needs to be fixed on the rotating shaft of the machine tool during the processing, and then the core shaft is processed.

[0004] The prior art patent with publication number CN219633117U discloses a tool for processing a molecular pump mandrel, which includes a base, a mounting mechanism and a positioning mechanism. The base is a cylindrical structure, the positioning mechanism is connected to one end of the base, the positioning mechanism is used to position the mandrel, the mounting mechanism is connected to the end of the base away from the positioning mechanism, and the mounting mechanism is used to connect to the rotating shaft of the machine tool. The specification mentions: "A matching hole is opened on the shaft core, and the third bolt passes through the matching hole and is bolted into the positioning hole, and the mandrel is fixed by the third bolt." The mandrel needs to be provided with a matching hole. In essence, the mandrel needs to be pre-fixed on the mounting plate, and then the mounting plate is used to abut against the positioning mechanism and connect to the base. This not only increases the weight of the tooling workpiece, resulting in an increase in the load pressure of the tooling, but also makes the connection method cumbersome and time-consuming. Utility Model Content

[0005] The utility model provides a tooling structure for processing a molecular pump core shaft, which is conducive to solving the problems of large tooling load pressure, complicated assembly and disassembly, and time-consuming and labor-intensive existing in some current tooling structures for processing molecular pump core shafts.

[0006] The utility model is achieved in this way:

[0007] A tooling structure for processing a molecular pump core shaft comprises a mounting seat for connecting to a machine tool rotating shaft, a base is provided at the outer end of the mounting seat, and a tooling seat for mounting a fixed core shaft is provided at the outer end of the base. The tooling seat comprises a fixed part and a movable part which are arranged relatively to each other, the inner end of the fixed part is fixedly connected to the base, the inner end of the movable part is movably connected to the base, the movable part can move closer to or away from the fixed part, a displacement locking structure is provided between the movable part and the base, symmetrical semicircular slots are provided on adjacent sides of the movable part and the fixed part, and a tooling groove with a circular cross-sectional profile is formed at the connection between the movable part and the fixed part after being assembled, and the tooling groove is used to rigidly fit and wrap the core shaft.

[0008] On the basis of the above technical solution, a plurality of through holes are centrally symmetrically provided on the periphery of the mounting seat, and first bolts are arranged in the through holes.

[0009] On the basis of the above technical solution, a detachable panel is provided at the outer end of the base, and the tooling seat is arranged at the outer end of the panel.

[0010] Based on the above technical solution, the periphery of the panel is connected to the base through a plurality of second bolts.

[0011] Based on the above technical solution, the fixed part and the movable part are both semi-disc structures, and an extended baffle is provided at the outer end of the semi-circular slot hole. The inner side wall contour of the extended baffle is aligned with the semi-circular slot hole.

[0012] Based on the above technical solution, the panel is provided with a track groove with a "T"-shaped longitudinal profile at the bottom of the movable part, and a guide block adapted to the track groove is provided at the bottom of the movable part. The bottom of the guide block and the track groove constitute a card-connecting limiting structure to prevent the movable part from detaching from the panel.

[0013] Based on the above technical solution, the locking structure includes a fastening hole provided on the movable part, which passes through the main body and guide block of the movable part. The fastening hole is a threaded through hole perpendicular to the sliding direction of the movable part, and is used to cooperate with the fastening bolt to form a locking and limiting structure of the movable part.

[0014] Based on the above technical solution, a recessed groove is provided at the bottom of the fastening hole, and a pressure block is provided in the recessed groove. When the fastening bolt is tightened in the fastening hole, the bottom of the fastening bolt abuts against and presses the pressure block, and the bottom of the pressure block fits tightly with the bottom of the track groove.

[0015] Based on the above technical solution, a groove is provided on the top of the pressing block to match the bottom contour of the fastening bolt.

[0016] On the basis of the above technical solution, the bottom of the pressing block is provided with an anti-skid sheet, and the bottom surface of the anti-skid sheet is provided with anti-skid grooves.

[0017] Compared with the prior art, the present invention has at least the following advantages:

[0018] The utility model arranges relatively distributed fixed parts and movable parts on the tooling seat, and the movable part can move closer to or away from the fixed part. A displacement locking structure is provided between the movable part and the base. After the movable part and the fixed part are assembled, the connection portion forms a tooling groove with a circular cross-sectional profile. The tooling groove is used for rigidly fitting and wrapping the core shaft to achieve a stable and reliable tooling effect, and can conveniently perform tooling operations on the core shaft body. In addition, the opening and closing control of the movable part and the fixed part can facilitate loading and unloading, which is conducive to solving the problems of large tooling load pressure, cumbersome disassembly and assembly, and time-consuming and labor-intensive tooling structures in some current molecular pump core shaft processing tooling structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a schematic structural diagram of a tooling structure for processing a molecular pump core shaft in one embodiment;

[0021] Figure 2 for Figure 1 A top view of

[0022] Figure 3 for Figure 2 Schematic diagram of the structure of the moving parts;

[0023] Figure 4 for Figure 3 sectional view of

[0024] Figure 5 is a cross-sectional view of a pressing block in another embodiment;

[0025] Figure 6 Schematic diagram of the structure of the anti-slip pattern in one embodiment.

[0026] Markings in the figure: 1. Mounting seat; 11. First bolt; 2. Base; 21. Panel; 22. Second bolt; 23. Track groove; 3. Tooling seat; 31. Fixing part; 32. Movable part; 321. Extension baffle; 322. Tooling groove; 323. Guide block; 324. Fastening hole; 325. Pressing block; 3251. Groove; 3252. Anti-slip sheet; 3253. Anti-slip pattern. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the present invention.

[0028] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically specified.

[0029] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Example 1: Combination Figure 1-4 This embodiment discloses a tooling structure for molecular pump core shaft processing, which aims to solve the problems of some current tooling structures for molecular pump core shaft processing, such as high tooling load pressure, complicated assembly and disassembly, and time-consuming and labor-intensive.

[0032] The tooling structure specifically includes an installation seat 1 , a base 2 , and a tooling seat 3 .

[0033] The mounting seat 1 is used to connect the machine tool shaft; the base 2 serves as a bearing connection structure, providing a carrier for the installation and operation of the tooling seat 3; the tooling seat 3 is used for convenient tooling of the core shaft.

[0034] Specifically, a plurality of through holes are centrally symmetrically provided on the periphery of the mounting seat 1 , and first bolts 11 are disposed in the through holes.

[0035] A removable panel 21 is provided on the outer end of the base 2, and the tooling seat 3 is mounted on the outer end of the panel 21. The outer periphery of the panel 21 is connected to the base 2 via a plurality of second bolts 22. This makes the structure of the base 2 flexible and versatile, allowing the panel 21 to be removed and replaced according to actual needs. In other words, in actual use, the appropriate tooling seat 3 and the corresponding panel 21 can be selected according to the specifications of the mandrel to be processed, eliminating the need for frequent disassembly and assembly of the base 2 and mounting base 1, greatly improving the convenience of processing and maintenance.

[0036] like Figure 1 and Figure 2 As shown, the tooling seat 3 includes a fixed part 31 and a movable part 32 arranged relatively to each other. The inner end of the fixed part 31 is fixedly connected to the base 2 to form an integrated structure. The inner end of the movable part 32 is movably connected to the base 2. The movable part 32 can move closer to or away from the fixed part 31. A displacement locking structure is provided between the movable part 32 and the base 2. Symmetrical semicircular grooves are provided on adjacent sides of the movable part 32 and the fixed part 31. After the movable part 32 and the fixed part 31 are assembled, the connection portion forms a tooling groove 322 with a circular cross-sectional profile. The tooling groove 322 is used to rigidly fit and wrap the core shaft.

[0037] Furthermore, both the fixed member 31 and the movable member 32 are semi-circular discs, and an extension baffle 321 is provided on the outer ends of the semi-circular slot. The inner sidewall of the extension baffle 321 is aligned with the semi-circular slot. The extension baffle 321 serves to further increase the wrapping area of ​​the mandrel after it is placed in the tooling slot 322, thereby ensuring more stable and reliable tooling accuracy for the mandrel.

[0038] Combine Figure 2 and Figure 3 As shown, the panel 21 is provided with a track groove 23 with a "T"-shaped longitudinal cross-sectional profile at the bottom of the movable part 32, and a guide block 323 adapted to the track groove 23 is provided at the bottom of the movable part 32. The bottom of the guide block 323 and the track groove 23 constitute a clamping and limiting structure to prevent the movable part 32 from separating from the panel 21. That is to say, the bottom of the movable part 32 and the track groove 23 form a slidable concave-convex clamping structure.

[0039] Combine Figure 4The locking structure includes a fastening hole 324 provided on the movable member 32. The fastening hole 324 passes through the main body of the movable member 32 and the guide block 323. The fastening hole 324 is a threaded through-hole perpendicular to the sliding direction of the movable member 32, and is used to cooperate with a fastening bolt (not shown in the figure) to form a locking and limiting structure for the movable member 32. The bottom of the fastening hole 324 is provided with a recessed groove, and a pressure block 325 is provided in the recessed groove. When the fastening bolt is locked in the fastening hole 324, the bottom of the fastening bolt abuts and presses the pressure block 325, and the bottom of the pressure block 325 is tightly fitted with the bottom of the track groove 23. In this structure, the pressure block 325 replaces the bottom structure of the fastening bolt, increasing the contact area with the panel 21, thereby improving the locking stability.

[0040] Example 2: Based on Example 1, Figure 5 As shown, in this embodiment, in order to make the cooperation between the fastening bolt and the pressure block 325 more stable and to avoid unstable connection and poor pressing effect, a groove 3251 is provided on the top of the pressure block 325 to adapt to the bottom contour of the fastening bolt. After the fastening bolt is tightened, the bottom of the fastening bolt can extend into the groove 3251, and the side contour of the groove 3251 constitutes a certain degree of limiting anti-falling or anti-deflection structure.

[0041] Furthermore, in this embodiment, in order to further improve the locking effect, combined with Figure 6 As shown, the bottom of the pressing block 325 is provided with an anti-slip sheet 3252, and the bottom surface of the anti-slip sheet 3252 is provided with anti-slip grooves 3253. The anti-slip grooves 3253 are several circular protrusions arranged at the bottom of the anti-slip sheet 3252. It should be noted that the anti-slip sheet 3252 is made of elastic materials such as rubber and silicone.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A tooling structure for processing a molecular pump core shaft, characterized in that: The invention comprises a mounting seat (1) for connecting a machine tool rotating shaft, wherein the outer end of the mounting seat (1) is provided with a base (2), and the outer end of the base (2) is provided with a tool seat (3) for installing a fixed core shaft, and the tool seat (3) comprises a fixed part (31) and a movable part (32) arranged opposite to each other, the inner end of the fixed part (31) is fixedly connected to the base (2), and the inner end of the movable part (32) is movably connected to the base (2), and the movable part (32) can move closer to or away from the fixed part (31), and a displacement locking structure is provided between the movable part (32) and the base (2), and symmetrical semicircular slots are respectively provided on adjacent sides of the movable part (32) and the fixed part (31), and a tool slot (322) with a circular cross-sectional profile is formed at the connection point after the movable part (32) and the fixed part (31) are spliced ​​together, and the tool slot (322) is used to rigidly fit and wrap the core shaft.

2. A tooling structure for processing a molecular pump core shaft according to claim 1, characterized in that: The periphery of the mounting seat (1) is provided with a plurality of through holes in a centrally symmetrical manner, and first bolts (11) are arranged in the through holes.

3. The tooling structure for processing a molecular pump core shaft according to claim 1, characterized in that: A detachable panel (21) is provided at the outer end of the base (2), and the tooling seat (3) is arranged at the outer end of the panel (21).

4. A tooling structure for processing a molecular pump core shaft according to claim 3, characterized in that: The periphery of the panel (21) is connected to the base (2) via a plurality of second bolts (22).

5. The tooling structure for processing a molecular pump core shaft according to claim 3, characterized in that: The fixed part (31) and the movable part (32) are both semi-disc structures. The fixed part (31) and the movable part (32) are provided with an extension baffle (321) at the outer end of the semi-circular slot hole, and the inner side wall profile of the extension baffle (321) is aligned with the semi-circular slot hole.

6. The tooling structure for processing a molecular pump core shaft according to claim 5, characterized in that: The panel (21) is provided with a track groove (23) with a longitudinal section profile in a T-shape at the bottom of the movable part (32); a guide block (323) adapted to the track groove (23) is provided at the bottom of the movable part (32); the bottom of the guide block (323) and the track groove (23) form a clamping limit structure for preventing the movable part (32) from separating from the panel (21).

7. A tooling structure for processing a molecular pump core shaft according to claim 6, characterized in that: The locking structure includes a fastening hole (324) provided on the movable part (32), the fastening hole (324) passing through the main body of the movable part (32) and the guide block (323), the fastening hole (324) being a threaded through hole perpendicular to the sliding direction of the movable part (32), and being used to cooperate with a fastening bolt to form a locking and limiting structure of the movable part (32).

8. The tooling structure for processing a molecular pump core shaft according to claim 7, characterized in that: The bottom of the fastening hole (324) is provided with a recessed groove, and a pressing block (325) is provided in the recessed groove. When the fastening bolt is locked in the fastening hole (324), the bottom of the fastening bolt abuts against and presses the pressing block (325), and the bottom of the pressing block (325) is tightly fitted with the bottom of the track groove (23).

9. The tooling structure for processing a molecular pump core shaft according to claim 8, characterized in that: The top of the pressing block (325) is provided with a groove (3251) adapted to the bottom profile of the fastening bolt.

10. The tooling structure for processing a molecular pump core shaft according to claim 9, characterized in that: The bottom of the pressing block (325) is provided with an anti-skid sheet (3252), and the bottom surface of the anti-skid sheet (3252) is provided with anti-skid patterns (3253).

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