A thin-walled ring assembly outer circle fixing device

Abstract

The utility model discloses a kind of outer circle fixing devices for thin-walled ring assembly, belong to workpiece clamping technical field.The core of the utility model is that it includes a chuck body, multiple radial movement chuck claws, and key multiple swing pressure rods.Each swing pressure rod is pivotally connected with a chuck claw by connecting assembly.When chuck claw is radially clamped, this pivotally connects allows each swing pressure rod to swing freely, so that its contact surface can be self-adaptively fitted with the outer circumference of workpiece, to distribute clamping force evenly, effectively prevent workpiece deformation.The utility model is simple in structure, clamping is fast and reliable, can significantly improve the assembly quality and efficiency of thin-walled part, while protecting workpiece from damage.

Description

Technical Field

[0001] This utility model relates to the field of precision mechanical assembly technology, and in particular to an outer circle fixing device for assembling thin-walled ring parts. Background Technology

[0002] Airtight bearings used in high-end equipment manufacturing not only require flexible rotation but also must meet stringent airtightness requirements. These bearings typically consist of components such as an outer ring bearing and a pressure ring bearing, which are connected by precision threads. Airtightness is achieved by tightening the pressure ring bearing to evenly compress the internal sealing gasket.

[0003] During assembly, to ensure uniform stress on the sealing gasket and prevent wrinkles, a smooth and slowly increasing assembly torque must be applied to the pressure ring bearing. Traditional assembly methods typically rely on operators directly holding the outer ring bearing by hand and then tightening the pressure ring with tools. However, this primitive method has serious technical drawbacks. For example, components such as airtight bearings are often designed with very thin walls to achieve weight reduction. When an operator holds the bearing by hand, the pressure from their fingers is concentrated at a few points, easily causing localized pressure on the thin-walled outer ring bearing, resulting in unidirectional elastic or even plastic deformation, affecting the final dimensional accuracy and airtight performance. Furthermore, it is difficult to maintain a constant hand position and force. During torque application, the hand will unconsciously move and adjust, causing fluctuations in the torque applied to the threads, failing to meet the requirements of precision assembly.

[0004] Relying solely on manual operation not only results in low assembly efficiency, but also leads to inconsistent assembly results among different operators and at different times, making it difficult to guarantee the quality stability of mass production.

[0005] In view of the above problems, there is an urgent need for a special fixing device that can quickly, stably, and with low deformation clamping of thin-walled annular parts and withstand large assembly torques, so as to solve the above technical pain points. Utility Model Content

[0006] In view of this, the purpose of this utility model is to overcome the shortcomings of the prior art and provide a device with a simple structure, convenient operation, and the ability to quickly and with low deformation clamping and fixing of thin-walled annular parts, so as to ensure the stability and accuracy of the thread assembly process.

[0007] According to this utility model, an outer circle fixing device for assembling a thin-walled annular part is provided, comprising: a chuck body having a plurality of radially movable chuck jaws; at least one supporting swing rod, the supporting swing rod being fixedly mounted on the chuck jaws; and at least one swinging pressure rod, the swinging pressure rod being rotatably connected to the supporting swing rod via a pivot, the swinging pressure rod having at least two contact points for contacting the outer circumference of the thin-walled annular part; wherein, when the chuck jaws move inward, the swinging pressure rod is driven to contact and clamp the thin-walled annular part, and through its swinging ability around the pivot, the contact points adaptively conform to the outer circumference of the thin-walled annular part. In this application, through the six-point contact and pivot swinging design of the swinging pressure rod, the clamping force is evenly distributed, avoiding local deformation of the thin-walled part.

[0008] Furthermore, the pivot is a smooth rod screw, and the swing pressure rod has a through hole that matches the smooth rod section of the smooth rod screw. The smooth rod screw has a simple structure and low cost, and the through hole fit allows the pressure rod to be freely fine-tuned to adapt to workpiece surface fluctuations. The fluctuation can be stably clamped within ±0.5mm.

[0009] Furthermore, the number of chuck jaws is three, and they are evenly distributed on the chuck body. Each chuck jaw is equipped with a support swing rod and a swing pressure rod. In this application, the symmetrical layout of the three jaws makes the clamping force evenly distributed along the circumference. Combined with the chuck jaws evenly distributed on the chuck body, it avoids workpiece eccentricity.

[0010] Furthermore, the swing pressure rod has six contact points. Compared with the traditional three-point contact, the contact area is increased by 100% and the pressure per unit area is reduced by 50%, significantly reducing indentations on the workpiece surface.

[0011] Furthermore, a protective material is bonded to the surface of the swinging pressure rod that contacts the thin-walled annular component.

[0012] Furthermore, a support column is detachably mounted on the support rod, the support column being used to provide additional support when clamping the thin-walled annular piece.

[0013] Furthermore, the support rocker arm is provided with multiple mounting holes for adjusting the mounting position of the support rocker arm on the chuck jaws to adapt to thin-walled annular parts of different diameters.

[0014] Furthermore, a step is designed at the rear of the support rod for internal clamping and fixing of the assembly tooling.

[0015] Furthermore, the outer circle fixing device further includes: an outer ring bearing disposed on the moving track of the chuck jaw for supporting the radial movement of the chuck jaw; and a pressure ring bearing disposed at the pivot part of the swinging pressure rod for supporting the swinging part of the swinging pressure rod.

[0016] Furthermore, the chuck body is provided with scale markings for measuring the radial movement distance of the chuck jaws, so that the operator can accurately control the clamping size of the thin-walled annular component.

[0017] Beneficial effects This utility model provides an outer circle fixing device for assembling thin-walled annular parts. Through an innovative "pivot swing" self-positioning structure, it upgrades the traditional "point contact" rigid clamping to "multi-point adaptive" flexible clamping, allowing the clamping force to be evenly distributed on the outer circumference of the workpiece. This fundamentally solves the problem of clamping deformation caused by stress concentration in thin-walled parts. The device of this application provides a stable and reliable holding force, capable of withstanding large assembly torques, and completely solves the problems of insufficient and unstable manual gripping force, ensuring a smooth and controllable thread assembly process.

[0018] Furthermore, the device in this application utilizes a mature chuck structure as its foundation. The operator can quickly clamp and release the workpiece simply by rotating the chuck handle, significantly improving assembly efficiency compared to manual handling and the use of auxiliary tools. By designing different mounting holes on the support lever, the clamping range can be easily adjusted to accommodate products of different diameters. Simultaneously, protective rubber can be adhered to the contact surface to prevent any damage to the workpiece surface.

[0019] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0020] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0021] In the attached diagram: Figure 1 This diagram illustrates the structure of an outer circle fixing device for assembling thin-walled annular parts according to an embodiment of the present invention. Figure 2This diagram shows a top view of an outer circle fixing device for assembling thin-walled annular parts according to an embodiment of the present invention. Figure 3 This diagram shows a cross-sectional view of an outer circular fixing device for assembling thin-walled annular parts according to an embodiment of the present invention. Figure 4 An exploded structural diagram of an outer circle fixing device for assembling thin-walled annular parts provided in an embodiment of the present invention is shown.

[0022] Icon labels: 1-Smooth screw, 2-Support column, 3-Support swing arm, 4-Hex socket screw, 5-Chuck jaw, 6-Chuck body, 7-Outer ring bearing, 8-Pressure ring bearing, 9-Swing pressure rod, 10-Assembly fixture.

[0023] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0025] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0026] 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Example: Figure 1-4As shown, this utility model discloses an outer circle fixing device for assembling thin-walled annular parts. The device is based on a chuck body 6, preferably a manual three-jaw chuck, which can be easily driven by rotating an extended handle to simultaneously tighten towards the center or expand outward.

[0028] In one feasible implementation, on each of the chuck jaws 5, the outer diameter fixing device is fixedly mounted with at least one specially designed support lever 3 using an M6×20 socket head cap screw 4. Preferably, one support lever 3 is provided in this embodiment. The support lever 3 may have multiple pre-drilled threaded holes to allow for selection of a suitable mounting position based on the diameter of the workpiece to be clamped, thereby achieving compatibility with products of different sizes.

[0029] In this embodiment, the core component of this utility model is the swinging pressure rod 9. The swinging pressure rod 9 is rotatably connected to the supporting swing rod 3 via a pivot, and has at least two contact points for contacting the outer circumference of the thin-walled annular component. Preferably, there are six contact points in this application. When the chuck jaws 5 move inward, the swinging pressure rod 9 is driven to contact and clamp the thin-walled annular component, and through its swinging ability around the pivot, the contact points adaptively conform to the outer circumference of the thin-walled annular component. Specifically, as... Figure 4 As shown, each swing pressure rod 9 is an elongated pressure block with multiple contact surfaces machined on its inner side for contacting the workpiece. The swing pressure rod 9 is rotatably mounted on the support swing rod 3 via a "smooth rod screw 1" as a pivot. The swing pressure rod 9 has a through hole that mates with the smooth rod section of the smooth rod screw 1. The smooth rod portion of the smooth rod screw 1 passes through the through hole in the center of the swing pressure rod 9 and screws into the threaded hole of the support swing rod 3, forming a movable hinge between them, allowing the swing pressure rod 9 to swing freely within a certain range.

[0030] In this embodiment, a protective material is bonded to the surface of the swinging pressure rod 9 that contacts the thin-walled annular component.

[0031] In one feasible implementation, the number of chuck claws 5 is three, and they are evenly distributed on the chuck body 6. Each chuck claw 5 is equipped with a support swing rod 3 and a swing pressure rod 9.

[0032] In actual use, the operation procedure is as follows: First, rotate the chuck handle to expand the three chuck jaws 5 outward, thereby causing the swing pressure rods 9 to open. Place the thin-walled annular part to be assembled, such as an outer ring bearing 7, into the central area enclosed by the three swing pressure rods 9.

[0033] Then, rotate the chuck handle in the opposite direction to tighten the chuck jaws 5 inward. During the tightening process, the three swing levers 9 gradually approach and contact the outer circumference of the outer ring bearing 7. At the moment of contact, since the swing levers 9 can swing freely around the smooth screw 1, they will automatically adjust their posture until all contact points on them are evenly in contact with the surface of the outer ring bearing 7, thereby evenly distributing the clamping force. Finally, after the outer ring bearing 7 is stably and with low deformation clamped, the operator can insert the sealing gasket and the "pressure ring bearing 8" and apply the preset torque using tools such as a torque wrench to complete the threaded assembly.

[0034] In addition, such as Figure 1 As shown, in order to adapt to workpieces with different structures, a detachable support column 2 can also be designed and installed on the support swing rod 3 to extend the lower contact surface when needed, providing more stable and additional support for workpieces with larger size or special shape.

[0035] In one feasible implementation, such as Figure 3 As shown, the rear of the support rod 3 of this device is also designed with a step, which allows the device to be used not only for external circle clamping, but also for reverse use to clamp and fix some assembly fixtures 10 with internal holes. This multi-purpose device improves the utilization rate of the device.

[0036] In one feasible implementation, the support rocker arm 3 is provided with a plurality of mounting holes for adjusting the mounting position of the support rocker arm 3 on the chuck claw 5.

[0037] In one feasible embodiment, the outer circle fixing device further includes: an outer ring bearing 7 disposed on the moving track of the chuck claw 5 for supporting the radial movement of the chuck claw 5; and a pressure ring bearing 8 disposed on the pivot part of the swing pressure rod 9 for supporting the swinging part of the swing pressure rod 9.

[0038] In this embodiment, the chuck body 6 is provided with scale markings for measuring the radial movement distance of the chuck jaws 5.

[0039] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An outer circle fixing device for assembling thin-walled annular parts, characterized in that, include: A chuck body (6) having multiple radially movable chuck jaws (5); At least one support lever (3) is fixedly mounted on the chuck jaw (5); And at least one swinging rod (9), which is rotatably connected to the support rod (3) by a pivot, and the swinging rod (9) has at least two contact points for contacting the outer circumference of the thin-walled annular member; When the chuck jaw (5) moves inward, the swinging lever (9) is driven to contact and clamp the thin-walled annular piece, and through its swinging ability around the pivot, the contact point adaptively conforms to the outer circumference of the thin-walled annular piece.

2. The outer circle fixing device according to claim 1, characterized in that: The pivot is a smooth rod screw (1), and the swing pressure rod (9) has a through hole that matches the smooth rod section of the smooth rod screw (1).

3. The outer circle fixing device according to claim 2, characterized in that: The number of chuck claws (5) is three, and they are evenly distributed on the chuck body (6). Each chuck claw (5) is equipped with a support swing rod (3) and a swing pressure rod (9).

4. The outer circle fixing device according to claim 3, characterized in that: The swing lever (9) has six contact points.

5. The outer circle fixing device according to claim 4, characterized in that: The surface of the swinging pressure bar (9) that contacts the thin-walled annular part is bonded with a protective material.

6. The outer circle fixing device according to claim 3, characterized in that: A support column (2) is detachably mounted on the support rod (3), the support column (2) being used to provide additional support when clamping the thin-walled annular piece.

7. The outer circle fixing device according to claim 6, characterized in that: The support swing rod (3) is provided with multiple mounting holes for adjusting the mounting position of the support swing rod (3) on the chuck claw (5).

8. The outer circle fixing device according to claim 1, characterized in that: The rear position of the support swing rod (3) is designed with a step for clamping and fixing the assembly tooling in the inner hole.

9. The outer circle fixing device according to claim 1, characterized in that: Also includes: An outer ring bearing (7) is provided on the moving track of the chuck jaw (5) to support the radial movement of the chuck jaw (5); And a pressure ring bearing (8) located at the pivot of the swinging pressure rod (9) to support the swinging part of the swinging pressure rod (9).

10. The outer circle fixing device according to any one of claims 1-9, characterized in that: The chuck body (6) is provided with scale markings for measuring the radial movement distance of the chuck jaws (5).

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