Damage-free dismounting device for differential bearing
By designing a differential bearing free disassembly device including limiting gears and extrusion plates, the problem of easy damage to the differential bearing during the disassembly is solved, and safe and efficient bearing disassembly is achieved.
Patent Information
- Application Number
- CN202421403709.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-19
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-06-19
AI Technical Summary
When the differential bearing is separated from the differential mandrel, the bearing is prone to indentation or damage, affecting failure analysis.
A differential bearing free removal device is designed, including a base, a vertical rod, a fixing plate, a fixing sleeve, a limiting groove and an extrusion plate. The extrusion plate is driven down by the drive member, and the extrusion pressure is dispersed by the coordination of the limiting groove and the tooth.
It effectively avoids excessive stress on the bearing during the disassembly of the differential mandrel, prevents bearing damage or failure analysis from being affected, and improves the disassembly efficiency and safety.
Smart Images
Figure CN222643717U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of differential bearing disassembly tooling, in particular to a non-destructive disassembly device for a differential bearing. Background Art
[0002] The automobile differential is a mechanism that enables the left and right (or front and rear) driving wheels to rotate at different speeds. At present, the differential includes a transmission mandrel, a toothed key arranged on the outer peripheral wall of the transmission mandrel, and a gear frame structure for meshing with the toothed key. In actual application, the disassembly of the differential bearing plays an important role in the bearing failure analysis. Therefore, the bearing and the differential mandrel need to be disassembled when analyzing the bearing failure. The traditional disassembly method uses direct pressure to disassemble, and there is a certain gap between the shaft hole of the inner ring of the bearing and the mandrel. As a result, a gasket needs to be inserted between the shaft hole and the mandrel during disassembly to disperse the stress and avoid excessive stress concentration on a certain point of the inner ring of the bearing when the mandrel is subjected to direct pressure, resulting in indentation of the bearing or damage to the bearing. Bearing damage or indentation of the bearing or destruction of the shape of the bearing groove will affect the bearing failure analysis. Utility Model Content
[0003] In view of the shortcomings of the prior art, the utility model provides a non-destructive disassembly device for a differential bearing, in order to solve the problem in the prior art that the differential bearing is prone to indentation or bearing damage when being separated from the differential core shaft.
[0004] To achieve the above-mentioned purpose, the utility model provides a non-destructive disassembly device for differential bearings, including a base and a vertical pole set on the base, the vertical pole is connected to a fixing plate, the fixing plate is detachably connected to a fixing sleeve, the end face of the fixing sleeve is a placement surface for placing an external bearing to be disassembled and abutting against the outer ring side wall and the inner ring side wall of the external bearing to be disassembled, the fixing sleeve is penetrated by a through hole for the external differential core shaft to pass through along its height direction, and a limiting tooth groove for matching with the tooth key of the outer peripheral wall of the external differential core shaft is circumferentially opened on the inner peripheral wall of the through hole, an extrusion plate is movably arranged above the fixing plate, the extrusion plate is arranged opposite to the fixing plate, and a driving member for driving the extrusion plate to press down and extrude the external differential core shaft is arranged on the vertical pole.
[0005] The advantages of adopting the above technical solution are as follows: when it is necessary to disassemble the differential shaft and the bearing matching assembly, the operator first installs the fixing sleeve on the fixing plate, and then places the bearing to be disassembled on the fixing sleeve placement surface. At this time, the differential shaft is inserted into the through hole and the tooth key on the outer peripheral wall of the differential shaft is engaged with the limiting tooth groove. Then, the operator drives the extrusion plate to press down and squeeze the differential shaft through the driving member, so that the differential shaft gradually separates from the bearing and falls off from the through hole to the base, thereby realizing the disassembly of the bearing and the differential shaft; in the above technology, the limiting tooth groove is adapted to the tooth key, so that when the shaft penetrates the through hole, the tooth key on the outer peripheral wall of the shaft is engaged with the limiting tooth groove, and each tooth tooth of the tooth key on the outer peripheral wall of the conventional differential shaft It has a certain curvature, so that when the core shaft is squeezed by the extrusion plate, the force transmitted by the core shaft is transmitted to the tooth key and then transmitted to the inner wall of the limiting tooth groove through the tooth key, and then the extrusion force is dispersed through the cooperation of the tooth key and the limiting tooth groove, so as to avoid stress concentration that causes the outer peripheral wall of the core shaft to squeeze the shaft hole of the inner ring of the bearing, resulting in indentation of the inner ring of the bearing or the bearing groove is affected, so as to avoid the bearing failure analysis being affected, and the cooperation of the limiting tooth groove and the tooth key to avoid stress concentration and bearing damage. At the same time, the fixed sleeve can be detachably arranged on the fixed plate, and when it is necessary to disassemble the differential bearing assemblies of different sizes or types, the corresponding fixed sleeve can be replaced, that is, the fixed sleeve of the limiting tooth groove of different specifications can be replaced to adapt to different differential core shafts.
[0006] The utility model is further provided with: a fixing hole for the fixing sleeve to pass through is opened on the fixing plate, a limiting ring is annularly connected to the outer peripheral wall of the end of the fixing sleeve, and the bottom surface of the limiting ring is abutted and matched with the top surface of the fixing plate.
[0007] The benefits of adopting the above technical solution are: in the above technology, the fixing sleeve needs to be installed on the fixing plate before disassembly, and the fixing sleeve can be placed on the fixing plate by simply inserting the fixing sleeve into the fixing hole and making the bottom surface of the limiting ring abut against the top surface of the fixing plate, thereby facilitating the placement of the bearing to be disassembled on the fixing sleeve. At the same time, the disassembly efficiency is improved by the setting of the above technology, and when it is necessary to disassemble differential bearing assemblies of different sizes or types, the corresponding fixing sleeve can be replaced, that is, the fixing sleeve with limiting tooth grooves of different specifications can be replaced to adapt to different differential spindles.
[0008] The utility model is further configured as follows: a plurality of limit grooves are provided on the top surface of the fixing plate, the radial cross-section of each limit groove is arc-shaped, a plurality of limit groove combinations are arranged in a ring direction and are located outside the fixing hole, a limit plug is provided on the bottom surface of the limit ring corresponding to each limit groove position, each limit plug is plug-in-matched with the corresponding limit groove, and the shape of the limit plug is adapted to the shape of the limit groove.
[0009] The advantages of adopting the above technical solution are: the fixing sleeve is relatively fixed on the fixing plate by the insertion and cooperation of the limiting insert and the limiting groove, so as to avoid the fixing sleeve rotating along the axis direction of the fixing hole and causing slippage between the bearing and the fixing sleeve.
[0010] The utility model is further configured that: a connecting shaft is connected to the outer wall of the fixing plate, and a clamp for adjusting the height of the fixing plate relative to the base is connected between the connecting shaft and the vertical rod.
[0011] The benefits of adopting the above technical solution are: in the above technology, the connecting shaft is fixed to the vertical pole by a hoop, and the hoop is composed of a hoop plate, a wing plate, a tie rib plate, a bolt and an inner liner. It is a fastener that holds or clamps the vertical pole. Therefore, by adjusting the bolts of the hoop, the connecting shaft can be slid along the height direction of the vertical pole or be fastened to the vertical pole, and the height of the fixing plate relative to the base can be adjusted, so as to adapt to fixing sleeves of different sizes or types or provide for the insertion and dropping of differential core shafts of different lengths, thereby improving the splitting range and splitting efficiency. It is a prior art, so its specific connection method and function will not be described in detail.
[0012] The utility model is further configured as follows: the driving member includes a hydraulic press arranged on the top of the vertical pole, the output end of the hydraulic press is connected to a loading shaft, the loading shaft is coaxially aligned with the fixing sleeve, and the end of the loading shaft is aligned with the top wall of the extrusion plate.
[0013] The benefits of adopting the above technical solution are: in the above technology, the differential core shaft is stamped by a hydraulic press, so as to achieve rapid separation of the core shaft and the bearing and improve the separation efficiency. It is a prior art, so its specific structure and function will not be described in detail. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a three-dimensional view of the utility model;
[0015] Figure 2 A three-dimensional view of the assembly state of the fixed sleeve and the bearing to be disassembled of the utility model;
[0016] Figure 3 for Figure 2 3D view of the separation state;
[0017] Figure 4 It is a three-dimensional view of the fixing plate in the utility model. DETAILED DESCRIPTION
[0018] The utility model provides a non-destructive disassembly device for differential bearings, comprising a base 1 and a vertical rod 2 set on the base 1, the vertical rod 2 is connected with a fixing plate 21, the fixing plate 21 is detachably connected with a fixing sleeve 3, the end face of the fixing sleeve 3 is a placement surface for placing an external bearing to be disassembled and abutting against the outer ring side wall and the inner ring side wall of the external bearing to be disassembled, the fixing sleeve 3 is penetrated with a through hole 31 for the external differential core shaft to pass through along its height direction, the inner peripheral wall of the through hole 31 is circumferentially provided with a limiting tooth groove 311 for matching with the tooth key of the outer peripheral wall of the external differential core shaft, an extrusion plate 22 is movably arranged above the fixing plate 21, the extrusion plate 22 is arranged opposite to the fixing plate 21, the vertical rod 2 is provided with a driving member for driving the extrusion plate 22 to press down and squeeze the external differential core shaft, the fixing plate 21 is provided with a fixing hole 23 for the fixing sleeve 3 to pass through, and the outer peripheral wall of the end of the fixing sleeve 3 is circumferentially connected with a limiting ring 3 2. The bottom surface of the limit ring 32 is abutted against the top surface of the fixed plate 21. The top surface of the fixed plate 21 is provided with a plurality of limit grooves 24. The radial cross-section of each limit groove 24 is arc-shaped. The plurality of limit grooves 24 are arranged in an annular direction and are located outside the fixing hole 23. The bottom surface of the limit ring 32 is provided with a limit insert 33 corresponding to each limit groove 24. Each limit insert 33 is plugged and matched with the corresponding limit groove 24. The shape of the limit insert 33 is adapted to the shape of the limit groove 24. The outer wall of the fixed plate 21 is connected with a connecting shaft 25. A hoop 5 for adjusting the height of the fixed plate 21 relative to the base 1 is connected between the connecting shaft 25 and the vertical pole 2. The driving member includes a hydraulic press 4 arranged at the top of the vertical pole 2. The output end of the hydraulic press 4 is connected with a loading shaft 41. The loading shaft 41 is coaxially aligned with the fixed sleeve 3. The end of the loading shaft 41 is aligned with the top wall of the extrusion plate 22.
[0019] The bearing to be disassembled in the above technology is marked as 6 in the accompanying drawings of the specification.
[0020] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which shall fall within the scope of the utility model to be protected. The scope of protection of the utility model shall be defined by the attached claims and their equivalents.
Claims
1. A non-destructive disassembly device for differential bearings, characterized in that: It includes a base and a vertical pole set on the base, the vertical pole is connected to a fixing plate, the fixing plate is detachably connected to a fixing sleeve, the end face of the fixing sleeve is a placement surface for placing an external bearing to be removed and abutting against the outer ring side wall and the inner ring side wall of the external bearing to be removed, the fixing sleeve is penetrated by a through hole for the external differential core shaft to pass through along its height direction, and a limiting tooth groove for matching with the tooth key of the outer peripheral wall of the external differential core shaft is circumferentially opened on the inner peripheral wall of the through hole, an extrusion plate is movably arranged above the fixing plate, and the extrusion plate is arranged opposite to the fixing plate, and a driving member for driving the extrusion plate to press down and extrude the external differential core shaft is arranged on the vertical pole.
2. A non-destructive disassembly device for differential bearing according to claim 1, characterized in that: The fixing plate is provided with a fixing hole for the fixing sleeve to pass through, and a limiting ring is circumferentially connected to the outer peripheral wall of the end of the fixing sleeve, and the bottom surface of the limiting ring is abutted and matched with the top surface of the fixing plate.
3. A non-destructive disassembly device for differential bearing according to claim 2, characterized in that: The top surface of the fixing plate is provided with a plurality of limit grooves, each of which has an arc-shaped radial cross-section, and a plurality of limit groove combinations are arranged in a ring direction and are located outside the fixing hole, and a limit plug is provided on the bottom surface of the limit ring corresponding to each limit groove position, and each limit plug is plug-in-matched with the corresponding limit groove, and the shape of the limit plug is adapted to the shape of the limit groove.
4. The non-destructive disassembly device for differential bearing according to claim 1, characterized in that: The outer wall of the fixing plate is connected with a connecting shaft, and a clamp for adjusting the height of the fixing plate relative to the base is connected between the connecting shaft and the vertical rod.
5. The non-destructive disassembly device for differential bearing according to claim 1, characterized in that: The driving member comprises a hydraulic press arranged on the top of the vertical pole, the output end of the hydraulic press is connected with a loading shaft, the loading shaft is coaxially aligned with the fixing sleeve, and the end of the loading shaft is aligned with the top wall of the extrusion plate.