Conical bearing inner ring dismounting tool
By designing a disassembly fixture for the inner ring of a tapered bearing, and using threaded connections and fasteners for the upper and lower clamping parts, the problems of time-consuming and labor-intensive disassembly and damage to the output shaft were solved, achieving an efficient and low-cost disassembly process.
Patent Information
- Application Number
- CN202522733474.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-24
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-12-24
AI Technical Summary
Existing technologies require multiple pieces of equipment and are time-consuming and labor-intensive when disassembling the inner ring of a tapered roller bearing. They can also easily damage the output shaft and large gear, or even lead to scrapping. Furthermore, traditional methods can damage the bearing itself.
A tooling for disassembling the inner ring of a tapered bearing was designed, comprising an upper clamping part and a lower clamping part, which are fixed by threaded connection and fasteners, and combined with a fastening screw and a baffle to achieve disassembly of the bearing inner ring.
It enables single-person operation without the need for multiple devices, avoids damage to the output shaft and large gear, improves disassembly efficiency, and reduces production costs.
Smart Images
Figure CN223889924U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of disassembly tooling technology, and in particular to a disassembly tooling for the inner ring of a tapered bearing. Background Technology
[0002] The main function of the inner ring of the bearing in the gearbox is to fit tightly with the shaft and rotate synchronously, support the load of the shaft and reduce friction, while ensuring the positioning accuracy of the shaft.
[0003] During gearbox assembly, the inner ring of the tapered roller bearing needs to be heated before being fitted onto the output shaft. It has an interference fit with the output shaft. Once the bearing cools to room temperature, the inner ring will firmly engage with the output shaft. When the gearbox is under maintenance or a component needs replacement, the inner ring of the tapered roller bearing needs to be removed. Traditionally, there are two main methods for this:
[0004] The first method involves placing the output shaft, large gear, and bearing inner ring as a whole onto a counter-pressure device. A forklift is used to hold the large gear, and a crane is used to lift the output shaft. The counter-pressure device is then used to push the output shaft out, thus removing the large gear and bearing inner ring from the output shaft. This method ensures the integrity of the bearing inner ring, but it is time-consuming, labor-intensive, and requires multiple pieces of equipment. Since the large gear, bearing inner ring, and output shaft are all interference fit, the process of forcibly pushing them out can easily cause scratches on the inner bores of the output shaft, large gear, and bearing inner ring. In severe cases, the output shaft and large gear may be rendered unusable.
[0005] The second method involves first destroying the cage, then heating the inner ring with a flame to cause it to expand and detach. Since there are no specialized disassembly tools, each disassembly means the loss of a bearing.
[0006] Therefore, there is an urgent need in this field to design a novel tooling for disassembling the inner ring of a tapered bearing. Utility Model Content
[0007] The purpose of this invention is to provide a tooling for disassembling the inner ring of a tapered bearing.
[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0009] A tooling for disassembling the inner ring of a tapered bearing includes an upper clamping part and a lower clamping part that are mated together. Both the upper clamping part and the lower clamping part are semi-circular. One end of each of the upper clamping part and the lower clamping part has a step on its outer edge, and the other end has a threaded hole on its end face. The step has a threaded hole perpendicular to the end face. The threaded hole at the step end of the upper clamping part is directly opposite to the threaded hole at the non-step end of the lower clamping part, and the threaded hole at the step end of the lower clamping part is directly opposite to the threaded hole at the non-step end of the upper clamping part. A first fastener passes through the threaded hole and fixes the upper clamping part and the lower clamping part together.
[0010] Multiple first screw thread holes are evenly distributed on the inner bottom surfaces of the upper clamping part and the lower clamping part. One end of the fastening screw is connected to the first screw thread hole, and the other end passes through the second screw through hole on the baffle. The fastening screw is fixed to the baffle by the second fastener.
[0011] The inner bottom surfaces of the upper clamping part and the lower clamping part face the inner ring of the bearing, while the outer bottom surfaces face away from the inner ring of the bearing.
[0012] The upper clamping part and the lower clamping part have a trapezoidal groove at the center of their inner bottom surfaces, and the top diameter of the groove is larger than the bottom diameter.
[0013] The bottom diameter of the groove is larger than the bottom diameter of the inner ring of the bearing.
[0014] The bottom surface of the groove abuts against the bottom surface of the inner ring of the bearing.
[0015] The inner diameter of the ring formed by the mating of the upper clamping part and the lower clamping part is equal to the diameter of the output shaft at the bearing inner ring mounting location.
[0016] The baffle plate has multiple through holes evenly distributed on it.
[0017] Compared with the prior art, the outstanding advantages of this utility model are:
[0018] This invention avoids the time-consuming and labor-intensive situation of requiring multiple pieces of equipment and adjustments while retaining the bearing. It also avoids the potential risk of damage to the output shaft and the inner bore of the large gear during the disassembly of the bearing inner ring, potentially rendering them unusable. The tapered bearing inner ring disassembly fixture of this invention has a simple structure and is easy to use. It requires no additional equipment, can be operated by a single person, and completely avoids damage to the tapered bearing inner ring during disassembly, significantly reducing production costs while improving disassembly efficiency.
[0019] The following description, in conjunction with the accompanying drawings and specific embodiments, further illustrates the tapered bearing inner ring disassembly fixture of this utility model. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the disassembly fixture for the inner ring of a tapered bearing.
[0021] Figure 2 This is a schematic diagram of the upper clamping part and the lower clamping part.
[0022] Figure 3 This is a schematic diagram of the baffle structure.
[0023] Figure 4 This is a schematic diagram before the bearing inner ring is disassembled.
[0024] Figure 5 This is a schematic diagram showing the usage status of the tooling for disassembling the inner ring of a tapered bearing.
[0025] Figure 6 This is a schematic diagram of the bearing inner ring after disassembly.
[0026] Figure 7 This is a cross-sectional view showing the connection relationship between the upper clamping part, the lower clamping part, the bearing inner ring, and the output shaft.
[0027] Among them, 1-upper clamping part, 2-lower clamping part, 3-first fastener, 4-fastening screw, 5-baffle, 6-second fastener, 7-output shaft, 8-large gear, 9-bearing inner ring, 10-first screw threaded hole, 11-second screw through hole, 12-through hole, 13-groove. Detailed Implementation
[0028] like Figure 1-7 As shown, a fixture for disassembling the inner ring of a tapered bearing includes an upper clamping part 1 and a lower clamping part 2 that are mated together. Both the upper clamping part 1 and the lower clamping part 2 are semi-circular. One end of each of the upper clamping part 1 and the lower clamping part 2 has a step on its outer edge, and the other end has a threaded hole on its end face. A threaded hole perpendicular to the end face is formed at the step. The threaded hole at the stepped end of the upper clamping part 1 is directly opposite the threaded hole at the non-stepped end of the lower clamping part 2. The stepped end of the lower clamping part 2... The threaded hole of the upper clamping part 1 is directly opposite to the threaded hole of the non-stepped end of the upper clamping part 1. The first fastener 3 passes through the threaded hole and fixes the upper clamping part 1 and the lower clamping part 2 together. Four first screw threaded holes 10 are evenly distributed on the inner bottom surface of the upper clamping part 1 and the lower clamping part 2. One end of the four fastening screws 4 is connected to the four first screw threaded holes 10, and the other end passes through the four second screw through holes 11 on the baffle 5. The fastening screws 4 are fixed to the baffle 5 by the second fastener 6.
[0029] The inner bottom surfaces of the upper clamping part 1 and the lower clamping part 2 face the inner ring 9 of the bearing, while the outer bottom surfaces face away from the inner ring 9 of the bearing.
[0030] A trapezoidal groove 13 is provided at the center of the inner bottom surface of both the upper clamping part 1 and the lower clamping part 2. The top diameter of the groove 13 is larger than the bottom diameter. The bottom diameter of the groove 13 is larger than the bottom diameter of the bearing inner ring 9. The bottom surface of the groove 13 abuts against the bottom surface of the bearing inner ring 9. The inner diameter of the ring formed by the mating of the upper clamping part 1 and the lower clamping part 2 is equal to the diameter of the output shaft 7 at the mounting location of the bearing inner ring 9.
[0031] Four through holes 12 are evenly distributed on the baffle 5, which serves to reduce weight.
[0032] The specific method for using this tapered bearing inner ring disassembly tool is as follows:
[0033] (1) First, place the upper clamping part 1 and the lower clamping part 2 on the bottom surface of the inner ring of the bearing to be disassembled, and use the first fastener 3 to connect the upper clamping part 1 and the lower clamping part 2 together.
[0034] (2) Screw the four fastening screws 4 into the four first screw thread holes 10.
[0035] (3) Insert the four second lead screw holes 11 on the baffle 5 into the four fastening screws 4 corresponding to them until they are in contact with the end of the output shaft 7.
[0036] (4) Screw the four second fasteners 6 onto the four fastening screws 4 until they contact the baffle 5.
[0037] (5) Tighten the four second fasteners 6 continuously to apply the tension. During the process of generating the tension, the baffle 5 remains stationary. The tension is transmitted to the upper clamping part 1 and the lower clamping part 2 through the four fastening screws 4, thereby pulling the inner ring of the bearing outward until the disassembly is completed.
[0038] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. They should not be construed as limitations on the present utility model. Any modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.
Claims
1. A tooling for disassembling the inner ring of a tapered bearing, characterized in that: The device includes an upper clamping part (1) and a lower clamping part (2) that are connected to each other. Both the upper clamping part (1) and the lower clamping part (2) are semi-circular rings. One end of the upper clamping part (1) and the lower clamping part (2) is provided with a step, and a threaded hole is provided on the end face of the other end. A threaded hole perpendicular to the end face is provided at the step. The threaded hole at the step end of the upper clamping part (1) is directly opposite to the threaded hole at the non-step end of the lower clamping part (2). The threaded hole at the step end of the lower clamping part (2) is directly opposite to the threaded hole at the non-step end of the upper clamping part (1). A first fastener (3) passes through the threaded hole and fixes the upper clamping part (1) and the lower clamping part (2) together. Multiple first screw thread holes (10) are evenly distributed on the inner bottom surface of the upper clamping part (1) and the lower clamping part (2). One end of the fastening screw (4) is connected to the first screw thread hole (10), and the other end passes through the second screw through hole (11) on the baffle (5). The fastening screw (4) is fixed together with the baffle (5) by the second fastener (6).
2. The tapered bearing inner ring disassembly fixture according to claim 1, characterized in that: The inner bottom surfaces of the upper clamping part (1) and the lower clamping part (2) face the inner ring (9) of the bearing, while the outer bottom surfaces face away from the inner ring (9).
3. The tapered bearing inner ring disassembly fixture according to claim 2, characterized in that: The inner bottom surface of the upper clamping part (1) and the lower clamping part (2) is provided with a groove (13) with a trapezoidal cross section, and the top diameter of the groove (13) is larger than the bottom diameter.
4. The tapered bearing inner ring disassembly fixture according to claim 3, characterized in that: The bottom diameter of the groove (13) is larger than the bottom diameter of the bearing inner ring (9).
5. The tapered bearing inner ring disassembly fixture according to claim 4, characterized in that: The bottom surface of the groove (13) abuts against the bottom surface of the inner ring (9) of the bearing.
6. The tapered bearing inner ring disassembly fixture according to claim 5, characterized in that: The inner diameter of the ring formed by the mating of the upper clamping part (1) and the lower clamping part (2) is equal to the diameter of the output shaft (7) at the bearing inner ring (9) where it is installed.
7. The tapered bearing inner ring disassembly fixture according to claim 6, characterized in that: The baffle (5) has multiple through holes (12) evenly distributed on it.