Locking chucking device for machining of a turbocharger intermediate housing

Abstract

This utility model discloses a locking and clamping device for machining the intermediate housing of a turbocharger, including a column, a drive assembly, and a tooling assembly. The drive assembly includes a core lift, a rotating lug, and a pressure plate. The core lift is slidably disposed inside the column. One end of the rotating lug is rotatably connected to the inner wall of the column, and the other end is connected to the core lift via a connecting rod. The pressure plate is slidably mounted on the outer surface of the column and contacts the lower end of the rotating lug. The tooling assembly includes a mandrel, a radial guide rod, and a clamping lug. The mandrel is fixedly connected to the core lift and has multiple inclined grooves on its surface. One end of the radial guide rod slidably abuts against the inclined grooves, and the other end is rotatably connected to the clamping lug. Under the force of the pressure plate, the rotating lug drives the core lift upward, causing the mandrel to rise. The inclined grooves push the radial guide rod to expand radially, causing the clamping lug to open and clamp the intermediate housing. The device can achieve rapid positioning, adaptive clamping, and automatic reset, and is suitable for efficient clamping and machining of the intermediate housing of a turbocharger.

Description

Technical Field

[0001] This utility model relates to the field of tooling structure technology, specifically a locking and clamping device for machining the intermediate housing of a turbocharger. Background Technology

[0002] As a key supercharging component in modern internal combustion engine systems, the turbocharger has a complex internal intermediate housing structure and high dimensional accuracy requirements, necessitating high-precision positioning and reliable clamping during machining. This is especially true when performing finishing, drilling, or milling operations on the inner wall of the intermediate housing, which places even higher demands on the stability, repeatability, and adaptability of the clamping device.

[0003] Currently, common methods for clamping intermediate housings in the industry mainly employ external pressure plates combined with internal support positioning structures or bolt-locking coupling molds. Typical solutions include: setting an expansion sleeve or tapered mandrel within the housing bore, and using mechanisms such as manually rotating nuts, lead screws, or cylinder pushers for internal support clamping. These clamping devices have the following problems in practical applications:

[0004] Traditional clamps often rely on manual tightening, manual reset, or multi-point coordinated clamping, resulting in long clamping times and high operational dependence, which is detrimental to continuous production on high-cycle automated machining lines. Existing screw-propellant locking mechanisms suffer from unstable clamping force due to uneven operating force or component wear, especially in high-frequency clamping scenarios, affecting machining repeatability accuracy. Existing structures are mostly designed for single workpieces, requiring replacement of multiple support or positioning components during model changes, making it difficult to quickly adapt to the machining needs of intermediate shells of different sizes or series. Most existing structures lack self-resetting capabilities, requiring manual operation for clamping or loosening, reducing the level of equipment intelligence and safety.

[0005] In summary, existing clamping structures for the intermediate housing of turbochargers generally suffer from technical bottlenecks such as low operating efficiency, unstable positioning, uncontrollable reset, and poor structural compatibility. There is an urgent need for a locking and clamping device that is compact, has linked actions, automatic reset, and is compatible with arc-shaped internal cavities, in order to improve clamping efficiency and machining consistency and meet the needs of modern precision machining and automated production lines. Utility Model Content

[0006] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0007] Therefore, the technical solution adopted by this utility model is as follows: a locking and clamping device for machining the intermediate housing of a turbocharger, comprising: a column rod, a drive assembly, and a tooling assembly. Its structure is reasonably designed, with high assembly precision, and it possesses good clamping stability and repeatability. The drive assembly includes a mandrel lift, a rotating lug, and a pressure plate. The mandrel lift is slidably disposed within the inner cavity of the column rod for driving the mandrel rod to rise and fall. One end of the rotating lug is rotatably connected to the inner wall of the column rod, and the other end is connected to the mandrel lift via a connecting rod, for realizing force transmission and direction conversion. The pressure plate is slidably disposed outside the column rod for triggering the rotating lug to deflect when the workpiece is pressed down, thereby linking the mandrel lift action.

[0008] Specifically, after the workpiece is fitted into and pressed against the pressure plate, the structure automatically drives the core lifting upwards, thus eliminating the need for external driving components. The structure is simple and reliable, improving the automated clamping capability.

[0009] In a preferred embodiment, the tooling assembly includes a mandrel, a radial guide rod, and a clamping lug. The mandrel is slidably disposed in the inner cavity of the column rod, and its bottom surface is fixedly connected to the core lifting mechanism. Multiple inclined grooves are evenly distributed on its surface. The inner end of the radial guide rod slidably abuts against the surface of the inclined grooves, and its outer end is rotatably connected to the clamping lug.

[0010] Specifically, when the core is lifted and the mandrel rod moves upward, the inclined groove applies an oblique thrust to the radial guide rod, driving it to expand radially outward, causing the clamping ears to open and fit tightly against the inner wall of the intermediate housing, thus achieving rapid adaptive clamping.

[0011] In a preferred example, several guide rods are evenly distributed circumferentially within the inner cavity of the rod, and their outer surfaces are configured as arc-shaped structures to fit the inner arc surface of the turbocharger intermediate housing.

[0012] Specifically, the structure achieves multi-point symmetrical clamping, improves the uniformity of shell clamping and the ability to resist off-center loads during processing, and ensures positioning stability.

[0013] In a preferred example, the inclined groove is an inclined slope structure, with its inclination direction perpendicular to the pressure plate and offset from the axis of the mandrel rod, which, together with the radial guide rod, generates radial driving force.

[0014] Specifically, this tilt design ensures that the radial guide rod undergoes stable radial displacement during the upward movement of the mandrel rod, improving the structure's self-locking capability and clamping reliability.

[0015] In a preferred example, the surface of the core lifter is provided with a counterweight to drive it to descend automatically after the external pressure is released, thereby causing the core shaft rod to descend and releasing the effect of the inclined groove on the guide rod.

[0016] Specifically, this structure eliminates the need for pneumatic or electric reset devices, enabling passive reset of the structure, simplifying system design, and reducing control costs.

[0017] In a preferred embodiment, the surface of the column rod is provided with multiple lubrication channels for directional oil supply to lubricate the sliding surfaces of the core and the mandrel rod.

[0018] Specifically, it effectively reduces wear under high-frequency use, improves device lifespan and operational stability, and ensures long-term clamping accuracy.

[0019] In summary, this utility model, by incorporating a core-lifting linkage structure, an inclined groove, a radial guide mechanism, and an automatic reset system, constitutes a compact, reliable, convenient, and highly adaptable clamping device for the processing of turbocharger intermediate housings. It has broad industrial application value and is particularly suitable for the rapid clamping and positioning of intermediate housings in automated and flexible processing production lines.

[0020] The beneficial effects achieved by this utility model are as follows:

[0021] 1. In this utility model, the core lifting structure is linked with the inclined groove and the radial guide rod to realize automatic locking and rapid release in the radial direction. It can adapt to the arc structure of the inner wall of the intermediate housing of the turbocharger. The clamping process does not require complicated operation. The structure is self-locking and reliable, which improves the processing and clamping efficiency and positioning stability.

[0022] 2. In this utility model, by setting an automatic reset core lifting structure with counterweight and combining it with the linkage mechanism of the pressure plate and the rotating lug, the clamping and loosening actions can be automatically triggered during the workpiece insertion and removal process, eliminating the tedious steps of traditional manual adjustment or bolt fixing, significantly improving the automation level and adaptability of the clamping process, and making it suitable for efficient clamping of intermediate shells of various specifications. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model;

[0024] Figure 2 This is a schematic diagram of the column cross-section structure according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the tooling assembly structure according to an embodiment of the present invention;

[0026] Figure 4 This is an exploded structural diagram of a drive component according to an embodiment of the present invention.

[0027] Figure label:

[0028] 100. Column;

[0029] 200. Drive assembly; 210. Core lifting mechanism; 220. Rotating lug; 230. Pressure plate; 211. Connecting rod;

[0030] 300. Tooling assembly; 310. Mandrel rod; 311. Angled groove; 320. Radial guide rod; 330. Clamping lug. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0032] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0033] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, a locking and clamping device for machining the intermediate housing of a turbocharger.

[0034] Combination Figures 1-4 As shown, this utility model provides a locking and clamping device for machining the intermediate housing of a turbocharger, comprising a rod 100, a drive assembly 200, and a tooling assembly 300. Wherein:

[0035] The drive assembly 200 includes a core lift 210, a rotating lug 220, and a pressure plate 230. The core lift 210 is slidably sleeved on the inner side of the column rod 100 and is used to drive the mandrel rod 310 to move up and down. One end of the rotating lug 220 is rotatably mounted on the inner side of the column rod 100, and its surface is provided with a connecting rod 211 connected to the core lift 210, which is used to convert the rotation into the lifting and lowering action of the core lift 210. The pressure plate 230 is slidably sleeved on the outer surface of the column rod 100, and its bottom is movably connected to the other end of the rotating lug 220, which drives the rotating lug 220 to deflect when subjected to external workpiece pressure.

[0036] The tooling assembly 300 includes a mandrel 310, several guide rods 320, and corresponding clamping lugs 330. The mandrel 310 is slidably sleeved on the inner side of the column rod 100, and its bottom surface is fixedly connected to the top surface of the core lifting 210. Several inclined grooves 311 are evenly distributed on the outer surface of the mandrel 310. The inclined grooves 311 are inclined slope structures, and the slope direction is deviated from the central axis of the mandrel 310 and inclined towards the pressure plate 230.

[0037] One end of the radial guide rod 320 slides against the surface of the inclined groove 311, while the other end is rotatably connected to the clamping lug 330. The radial guide rod 320 is radially arranged inside the column rod 100 and can slide radially under the wedging action of the inclined groove 311, causing the clamping lug 330 to open or retract radially, thereby clamping or releasing the inner wall of the intermediate housing of the turbocharger.

[0038] In a preferred embodiment, the radial guide rods 320 are divided into multiple symmetrical groups. Each group of radial guide rods 320 is evenly distributed along the circumferential direction of the column rod 100, and its outer surface is set to be arc-shaped to adapt to the arc-shaped structure of the inner wall of the turbocharger intermediate housing, so as to ensure surface contact during the clamping process and improve clamping stability.

[0039] In another preferred embodiment, the inclined groove 311 is in the shape of an inclined surface, which is inclined outward relative to the axis of the mandrel rod 310, so that the radial guide rod 320 generates a stable radial pushing force during the upward movement of the mandrel rod 310, and the structure is stable and reliable.

[0040] In this utility model, the surface of the lifting core 210 is provided with a counterweight. When not under force, the lifting core 210 automatically resets downward under the action of the counterweight, thereby driving the mandrel rod 310 downward, so that the guide rod 320 returns to the retractable state after disengaging from the inclined groove 311, thus realizing the automatic release of the clamping structure.

[0041] In addition, to enhance the lubrication performance of the mechanism, several lubrication channels are provided on the surface of the column rod 100, which can add lubricating grease during the assembly process to ensure the stability and wear resistance of the core 210 and the spindle rod 310 during frequent reciprocating operation.

[0042] In one application of this utility model, the workpiece, such as the intermediate housing of a turbocharger, is inserted from above the column rod 100. After the pressure plate 230 is pressed, the rotating lug rod 220 is deflected. The connecting rod 211 drives the core lifting 210 to move upward, and the core shaft rod 310 moves upward accordingly. Through the inclined groove 311, the radial guide rod 320 is driven to expand radially outward, so that the clamping lug 330 fits against the inner wall of the housing, achieving reliable clamping. After processing, the workpiece is lifted, the pressure plate 230 loses its clamping force, and the core lifting 210 automatically moves downward under the action of the counterweight. The clamping structure is released, achieving rapid demolding and resetting.

[0043] Working principle and usage process of this utility model:

[0044] This utility model provides a locking and clamping device for machining the intermediate housing of a turbocharger. It mainly uses a core lifting structure to drive the mandrel rod to rise and fall, and links it with the inclined wedge to achieve radial clamping and loosening. At the same time, with the help of the rotating lug and pressure plate structure, stable clamping and automatic reset are achieved. It is suitable for rapid positioning and locking of the inner cavity of the intermediate housing of a turbocharger.

[0045] The usage process is as follows: Initial reset stage: In the state of no driving force applied, the core lifting 210 is in the lower limit position under the action of the counterweight, and the core rod 310 moves down, driving the inclined groove 311 away from the radial guide rod 320, thereby unlocking the radial guide rod 320 and the clamping ear 330, which can freely retract inward to form a loose clamping state, making it easy for the workpiece to be inserted.

[0046] Clamping start-up stage: When a locking operation is required, the workpiece is fitted onto the surface of the column rod 100 and pressed down on the surface of the pressure plate 230 by gravity, causing the pressure plate 230 to descend. The rotating lug rod 220 deflects, and the connecting rod 211 drives the lifting core 210 to move upward, further lifting the mandrel rod 310 upward. The inclined groove 311 on the surface of the mandrel rod then pushes the radial guide rod 320 to slide outward, causing its outer end to drive the clamping lug 330 to open radially, thereby fitting with the inner wall arc surface of the intermediate shell to achieve stable clamping.

[0047] Machining and holding stage: In the clamped state, the radial guide rod 320 is continuously locked to the mandrel rod 310 through the wedge-shaped groove structure, which is not easy to loosen even if there is vibration or torque, thus ensuring the stability of workpiece clamping during the machining process.

[0048] Unloading stage: After processing, the turbocharger intermediate housing workpiece is lifted and shaken to detach from the surface of the pressure plate 230. The core lift 210 automatically descends under the action of the counterweight, and the core rod 310 descends accordingly. The inclined groove 311 moves away from the contact surface of the radial guide rod 320, and the radial guide rod 320 and the clamping lug 330 automatically unlock and can retract freely, realizing the automatic release of the clamping structure. The workpiece can be smoothly removed, completing one processing cycle.

[0049] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0050] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A locking and clamping device for machining the intermediate housing of a turbocharger, characterized in that, include: The assembly comprises a column rod (100), a drive assembly (200), and a tooling assembly (300). The drive assembly (200) includes a core lift (210), a rotating lug (220), and a pressure plate (230) slidably sleeved on the surface of the column rod (100). The core lift (210) is slidably disposed on the inner side of the column rod (100). One end of the rotating lug (220) is rotatably mounted on the inner side of the column rod (100), and its surface is provided with a connecting rod (211) connected to the core lift (210). The other end of the rotating lug (220) is connected to the pressure plate. The bottom surface of the disc (230) is movably connected; the tooling assembly (300) includes a mandrel rod (310), several radial guide rods (320) and abutment ears (330); the mandrel rod (310) is slidably sleeved on the inner side of the column rod (100), and the bottom surface of the mandrel rod (310) is fixedly connected to the top surface of the core lifting (210); several inclined grooves (311) are opened on the surface of the mandrel rod (310), one end of the radial guide rod (320) slides against the inclined groove (311), and the other end is rotatably connected to the surface of the abutment ears (330).

2. The locking and clamping device according to claim 1, characterized in that, The radial guide rods (320) are divided into multiple groups. Each group of radial guide rods (320) is evenly distributed in the circumferential direction on the surface of the column rod (100). The outer surface of the radial guide rods (320) is arc-shaped to adapt to the arc-shaped inner wall surface of the intermediate housing of the turbocharger.

3. The locking and clamping device according to claim 1, characterized in that, Each of the radial guide rods (320) is radially slidably mounted on the inner side of the column rod (100), and one end of the radial guide rod (320) is radially opposed to the surface of the inclined groove (311).

4. The locking and clamping device according to claim 1, characterized in that, The inclined groove (311) is in the shape of an inclined surface, and the inclined direction of the inclined groove (311) is perpendicular to the surface of the pressure plate (230) and deviates from the axis of the mandrel (310).

5. The locking and clamping device according to claim 1, characterized in that, The surface of the lifting core (210) is provided with a counterweight, which is used to pull the mandrel rod (310) downward to achieve reset when the lifting core (210) is in a non-stressed state.

6. The locking clamping device according to claim 1, characterized in that, The connection point between the rotating lug (220) and the connecting rod (211) is offset from the deflection axis of the rotating lug (220), and one end of the rotating lug (220) slides against the bottom surface of the pressure plate (230).

7. The locking and clamping device according to claim 1, characterized in that, The surface of the column rod (100) is provided with several lubricating oil channels for lubricating grease to wet the surfaces of the core (210) and the mandrel rod (310).

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