Bearing riveting device and method

Abstract

The invention belongs to the technical field of bearing assembling and manufacturing, and particularly relates to a bearing riveting device and method.The bearing riveting device comprises a support, a stress application mechanism and a riveting mechanism, the stress application mechanism and the riveting mechanism are installed on the support, and the support is fixed to a workbench; the stress application mechanism and the riveting mechanism are used in a matched mode, then pressure is applied to the riveting upper die, through extrusion of an upper extrusion face and a lower extrusion face on a part riveting groove, rapid and stable riveting of bearing assembly is achieved, the riveting process is stable, and the riveting degree in the circumferential range is uniform; the bearing riveting device and method can be suitable for assembling various bearings, the structural complexity of parts is reduced, the assembling process is simple, the operation efficiency of workers is high, and the quality is stable.

Description

Technical Field

[0001] The invention belongs to the technical field of bearing assembly and manufacturing, and specifically relates to a bearing riveting device and method. Background Art

[0002] Riveting is a commonly used method of metal connection, especially suitable for applications that need to withstand high forces or vibrations. It is a process of connecting two or more metal parts together, in which a rivet is inserted into a hole and then deformed by hammering or pressure to form a strong connection. For example, in the fields of aerospace, automobile manufacturing, shipbuilding, etc., riveting is widely used to connect various metal structures. The advantages of riveting are that the connection is firm, not easy to loosen, and will not cause damage to the connecting parts.

[0003] At present, the outer ring assembly in the field of bearing assembly mostly adopts the method of shouldering at one end and clamping or adding a retaining ring at the other end. The parts processing structure is complex, the precision requirements are high, the number of parts is large, and the assembly process is relatively complicated. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a bearing riveting device and method, which drives a trapezoidal screw nut mechanism with a handle to apply pressure to a riveting upper die, and realizes rapid and stable riveting of the bearing assembly through the extrusion of upper and lower extrusion surfaces. The riveting process is stable and the riveting degree is uniform in the circumferential range.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A bearing riveting device comprises a bracket, a force adding mechanism and a riveting mechanism, wherein the force adding mechanism and the riveting mechanism are installed on the bracket, and the bracket is fixed on a workbench;

[0007] The riveting mechanism comprises an upper riveting die and a lower riveting die; the upper riveting die is mounted on the bracket and can slide freely in the axial direction; the lower riveting die is fixedly connected to the bracket;

[0008] The force-adding mechanism includes a handle, a trapezoidal screw, a trapezoidal nut, and a shaft retaining ring. The handle is installed on the trapezoidal screw and drives the trapezoidal screw to rotate through a flat key; the trapezoidal nut is installed on the bracket through a hexagon socket bolt, and a pair of angular contact ball bearings are installed in series on the trapezoidal screw.

[0009] Specifically, a bearing end cover is threadedly mounted on the upper riveting die to limit the axial direction of the outer ring of the angular contact ball bearing.

[0010] Specifically, a shaft retaining ring is installed on the trapezoidal screw rod to axially limit the inner ring of the angular contact ball bearing.

[0011] By turning the handle, the trapezoidal lead screw is driven to move downward, and then the force is transmitted to the upper riveting die through the angular contact ball bearings arranged in series, providing riveting pressure to the riveting mechanism.

[0012] The upper riveting die and the lower riveting die are guided by the mandrel, the assembly of the part and the bearing is placed on the mandrel, and pressure is applied to the riveting upper die through the handle. The upper extrusion surface extrudes the upper part of the part, and the lower extrusion surface extrudes the lower part to rivet the bearing to the part.

[0013] The present invention also discloses a method for using a bearing riveting device, comprising the following steps:

[0014] S1. Riveting grooves need to be processed on parts, and sufficient riveting margins should be left in the riveting grooves;

[0015] S2. Place the parts and the bearing assembly between the upper and lower riveting molds, and pre-position the lower riveting mold mandrel on the inner ring of the bearing;

[0016] S3. Turn the handle to drive the upper riveting die to apply pressure evenly, and squeeze the riveting groove by extruding the upper and lower extrusion surfaces. After the upper and lower riveting dies and parts are tightly attached, keep them for 5 to 10 seconds.

[0017] S4. Shake the handle in the opposite direction to lift the riveting upper die until the parts can be taken out, completing the bearing riveting.

[0018] Riveting grooves need to be pre-processed on both end surfaces of the part mounting hole, and the riveting grooves have riveting allowances to make the riveting deformation more uniform and the riveting quality stable and reliable.

[0019] The present invention has the following advantages:

[0020] (1) The present invention uses a handle to drive a trapezoidal screw nut mechanism, thereby applying pressure to the riveting upper die, and through the upper and lower extrusion surfaces extruding the riveting grooves of the parts, the bearing assembly is quickly and stably riveted, the riveting process is stable, and the riveting degree in the circumferential range is uniform.

[0021] (2) The riveting method of the present invention reduces the use of end covers or retaining rings, making the assembly process simpler and faster, and the riveting quality is stable.

[0022] (3) The bearing riveting device and method of the present invention can be applied to the assembly of various bearings, reduce the structural complexity of parts, simplify the assembly process, increase worker operation efficiency, and ensure stable quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of a bearing riveting device of the present invention;

[0024] Figure 2 This is a schematic diagram of riveting and force application of the present invention;

[0025] Figure 3 It is a schematic diagram of the riveting working principle of the present invention;

[0026] In the figure, 1. bracket, 1-1 riveting bracket; 2. force adding mechanism; 2-1. handle; 2-2. flat key; 2-3. trapezoidal nut; 2-4. hexagon socket bolt; 2-5. trapezoidal screw rod; 2-6. bearing end cover; 2-7. angular contact ball bearing; 2-8. shaft retaining ring; 3. riveting mechanism; 3-1. upper riveting die; 3-2. lower riveting die. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0028] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] like Figure 1-3 As shown, a bearing riveting device provided in this embodiment is rigidly fixed on a stable workbench as a whole, so as to facilitate the application of riveting external force; it includes a bracket, a force-applying mechanism, and a riveting mechanism, wherein the force-applying mechanism and the riveting mechanism are installed on the bracket, and the bracket is fixed on the workbench;

[0030] In this embodiment, the riveting mechanism includes an upper riveting die and a lower riveting die; the upper riveting die is mounted on the bracket and can slide freely in the axial direction; the lower riveting die is fixedly connected to the bracket;

[0031] In this embodiment, the force-adding mechanism includes a handle, a trapezoidal screw, a trapezoidal nut, and a shaft retaining ring. The handle is installed on the trapezoidal screw and drives the trapezoidal screw to rotate through a flat key; the trapezoidal nut is installed on the bracket through a hexagon socket bolt, and a pair of angular contact ball bearings are arranged in series on the trapezoidal screw. The handle is manually turned to drive the trapezoidal screw to rotate through the key, and the trapezoidal nut is installed on the bracket through 4 hexagon socket bolts. The trapezoidal screw generates downward pressure through the differential speed of the trapezoidal screw and the trapezoidal nut. The pressure is transmitted to the upper riveting die through a pair of angular contact ball bearings arranged in series. The shaft retaining ring and the bearing end cover limit the axial movement of the angular contact ball bearing. The upper riveting die slides downward in the bracket under the action of pressure. The upper riveting die and the lower riveting die are guided by the mandrel. The assembly of the parts and the bearings is placed on the mandrel, and the bearings are stably and reliably riveted to the parts by extruding the upper and lower extrusion surfaces against the riveting grooves of the parts.

[0032] When a specific part is riveted to a bearing on a bearing riveting device, the following steps are included:

[0033] S1. Riveting grooves need to be processed on parts, and sufficient riveting allowance should be left in the rivet grooves.

[0034] S2. Place the parts and bearing assembly between the upper and lower riveting molds, and pre-limit the lower riveting mold mandrel to the inner ring of the bearing.

[0035] S3. Turn the handle to drive the upper riveting die to apply pressure evenly, and squeeze the riveting groove through the upper and lower extrusion surfaces. After the upper and lower riveting dies and parts are tightly attached, keep them for 5 to 10 seconds.

[0036] S4. Shake the handle in the opposite direction to lift the riveting upper die until the parts can be taken out, completing the bearing riveting.

[0037] The present invention is not limited to the aforementioned specific embodiments. The present invention extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed. Those of ordinary skill in the art will appreciate that the embodiments described herein are intended to help readers understand the principles of the present invention, and should be understood that the scope of protection of the present invention is not limited to such specific statements and embodiments.

[0038] A person skilled in the art may, based on the technical teachings disclosed in the present invention, make various other specific modifications and combinations without departing from the essence of the present invention, and these modifications and combinations are still within the protection scope of the present invention.

Claims

1. A bearing riveting device, characterized in that: It includes a bracket, a force-applying mechanism, and a riveting mechanism, wherein the force-applying mechanism and the riveting mechanism are installed on the bracket, and the bracket is fixed on a workbench; The riveting mechanism comprises an upper riveting die and a lower riveting die; the upper riveting die is mounted on the bracket and can slide freely in the axial direction; the lower riveting die is fixedly connected to the bracket; The force-adding mechanism includes a handle, a trapezoidal screw, a trapezoidal nut, and a shaft retaining ring. The handle is installed on the trapezoidal screw and drives the trapezoidal screw to rotate through a flat key; the trapezoidal nut is installed on the bracket through a hexagon socket bolt, and a pair of angular contact ball bearings are installed in series on the trapezoidal screw.

2. A bearing riveting device according to claim 1, characterized in that: The upper riveting die is threadedly mounted with a bearing end cover to limit the axial direction of the outer ring of the angular contact ball bearing.

3. A bearing riveting device according to claim 1, characterized in that: A shaft retaining ring is installed on the trapezoidal screw rod to limit the axial direction of the inner ring of the angular contact ball bearing.

4. A method for using a bearing riveting device according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1. Riveting grooves need to be processed on parts, and sufficient riveting margins should be left in the riveting grooves; S2. Place the parts and the bearing assembly between the upper and lower riveting molds, and pre-position the lower riveting mold mandrel on the inner ring of the bearing; S3. Turn the handle to drive the upper riveting die to apply pressure evenly, and squeeze the riveting groove by extruding the upper and lower extrusion surfaces. After the upper and lower riveting dies and parts are tightly attached, keep them for 5 to 10 seconds. S4. Shake the handle in the opposite direction to lift the riveting upper die until the parts can be taken out, completing the bearing riveting.

Images