Press fitting tool for main shaft bearing
By designing press-fit tooling for spindle bearings, it provides stable axial force, and solves the problem that spindle bearings need to be tapped and adjusted and cannot be compatible with different models of spindles, achieving stable installation and multi-spec suitability of bearings during cooling.
Patent Information
- Application Number
- CN202422120329.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-08-29
AI Technical Summary
In the prior art, spindle bearings need to be tapped and adjusted during installation, and cannot be compatible with different models of spindles. The purchase cost of hydraulic nuts is high, so it cannot be adapted to multiple spindle specifications.
Design a press-fit tool for spindle bearings, including spindles, main bearings, compression ring assembly and fasteners, providing stable axial force through compression ring assembly and fasteners, ensuring that the bearing remains in place during cooling and is compatible with different models of spindles.
It realizes the maintenance of stable axial force during bearing cooling, avoids knock damage, is compatible with a variety of spindle specifications, reduces cost, is simple to operate and has a wide range of applicability.
Smart Images
Figure CN223084695U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of automobile spare parts, and particularly relates to a press-fitting tooling for a main shaft bearing. Background Art
[0002] In the field of automobile spare parts, when replacing the bearing of the maintenance main shaft, since the installation is an interference fit or a clearance fit with high precision, the position of the bearing cannot be directly in place during installation. Subsequent tapping adjustment is required, which may cause the bearing to be easily impacted and damaged.
[0003] If a hydraulic nut is purchased, it can only fit the nut size of one type of main shaft and cannot be compatible with the two common main shaft specifications in the factory. Moreover, the cost of purchasing a hydraulic nut is relatively high.
[0004] Based on the above situation, the existing press-fitting of the main shaft bearing has the following disadvantages:
[0005] First, the main shaft bearing needs to be heated before installation and then sleeved on the main shaft mandrel. After multiple bearings and spacers are all sleeved back-to-back, the temperature of the bearing has not cooled down yet, so the position is not really in place.
[0006] Second, a hydraulic nut is normally required to ensure that the bearing will always fit tightly after cooling, including the spacer, and then the radial runout of the spacer is adjusted. However, there is only one specification for the hydraulic nut during procurement and it cannot be compatible with different types of main shaft bearings. Currently, we have two specifications of motor spindles for maintenance that require this pressing mechanism.
[0007] Therefore, in order to ensure the preloading during the cooling process after bearing replacement and to be compatible with different-sized nuts for preloading during the maintenance of different models of main shafts in this factory, the inventor of the present application designed a press-fitting tooling for a main shaft bearing. Content of the Utility Model
[0008] The technical problem to be solved by the utility model is to overcome the defects that the press-fitting of the main shaft bearing in the prior art requires tapping adjustment and cannot be compatible with different models of main shafts, and to provide a press-fitting tooling for a main shaft bearing.
[0009] The utility model solves the above technical problems through the following technical solutions:
[0010] A press-fitting tooling for a main shaft bearing, characterized in that the press-fitting tooling for the main shaft bearing comprises: a main shaft, a main shaft bearing, a pressing ring assembly and a fastener. A first mounting step is provided on the main shaft, the main shaft bearing is mounted on the first mounting step, the pressing ring assembly is sleeved on the core shaft of the main shaft and press-fitted on the main shaft bearing, and the fastener is fixed on the core shaft of the main shaft for pressing the pressing ring assembly and the main shaft bearing together, so that the main shaft bearing always bears an axial force.
[0011] According to an embodiment of the present invention, the pressing ring assembly includes an upper pressing ring, a lower pressing ring and a plurality of die springs. The lower pressing ring and the upper pressing ring are sequentially sleeved on the core shaft of the main shaft, and the die springs are pressed between the upper pressing ring and the lower pressing ring.
[0012] According to an embodiment of the present invention, a plurality of mounting grooves are formed on the lower pressing ring, and one end of the die spring is mounted in the mounting groove.
[0013] According to an embodiment of the present invention, the mounting groove is a counterbore.
[0014] According to an embodiment of the present invention, the pressing ring assembly further includes a pressure adjusting ring, which is sleeved on the core shaft of the main shaft and pressed against the upper pressing ring and the lower pressing ring.
[0015] According to an embodiment of the present invention, the pressing ring assembly further includes a first radial adjusting ring, which is mounted at the center of the upper pressing ring and sleeved on the core shaft of the main shaft.
[0016] According to an embodiment of the present invention, the pressing ring assembly further includes a second radial adjusting ring, which is mounted at the center of the lower pressing ring and sleeved on the core shaft of the main shaft.
[0017] According to an embodiment of the present invention, a second mounting step is provided on the main shaft, which is located above the first mounting step, and the second radial adjusting ring is mounted on the second mounting step.
[0018] According to an embodiment of the present invention, the fastener is a locking nut.
[0019] According to an embodiment of the present invention, the number of the die springs is eight.
[0020] The positive and progressive effects of the present invention are as follows:
[0021] The press-fitting tooling for the spindle bearing of the present utility model can be widely applied to various scenarios such as the replacement and repair of bearings in various equipment. Moreover, the press-fitting tooling does not need to be configured with a corresponding system and can provide a stable and continuous axial pressing force. At the same time, the press-fitting tooling also has the advantages of simple operation and being applicable to the installation of multiple types of spindle bearings. Brief Description of the Drawings
[0022] The above-mentioned and other features, properties, and advantages of the present utility model will become more obvious through the following description with reference to the drawings and embodiments. In the drawings, the same reference numerals always represent the same features, where:
[0023] Figure 1 is a schematic structural diagram of the press-fitting tooling for the spindle bearing of the present utility model.
[0024]
Reference Numerals
[0025] Spindle 10
[0026] Spindle bearing 20
[0027] Fastener 30
[0028] First installation step 11
[0029] Mandrel 12
[0030] Upper pressing ring 40
[0031] Lower pressing ring 41
[0032] Die spring 42
[0033] Installation groove 43
[0034] Pressure adjustment ring 44
[0035] First radial adjustment ring 45
[0036] Second radial adjustment ring 46
[0037] Second installation step 13 Detailed Embodiment
[0038] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following detailed description of the specific embodiments of the present utility model is provided with reference to the drawings.
[0039] Embodiments of the present utility model will now be described in detail with reference to the drawings. Preferred embodiments of the present utility model will now be described in detail, and examples thereof are shown in the drawings. Whenever possible, the same reference numerals will be used throughout the drawings to represent the same or similar parts.
[0040] In addition, although the terms used in the present utility model are selected from well-known and commonly used terms, some of the terms mentioned in the description of the present utility model may be selected by the applicant according to his or her judgment, and their detailed meanings are described in the relevant parts of the description herein.
[0041] In addition, it is required to understand the present utility model not only by the actual terms used, but also by the meanings implied by each term.
[0042] Figure 1 The figure is a schematic structural view of the press-fitting tooling for the spindle bearing of the present utility model.
[0043] As Figure 1 shown, the present utility model discloses a press-fitting tooling for a spindle bearing, which includes: a spindle 10, a spindle bearing 20, a pressing ring assembly, and a fastener 30. Among them, a first mounting step 11 is provided on the spindle 10, the spindle bearing 20 is mounted on the first mounting step 11, the pressing ring assembly is sleeved on the core shaft 12 of the spindle 10, and is press-fitted on the spindle bearing 20.
[0044] The fastener 30 is fixed on the core shaft 12 of the spindle 10 and is used to press the pressing ring assembly and the spindle bearing 20 together, so that the spindle bearing 20 always bears an axial force. Here, the fastener 30 can preferably be a lock nut.
[0045] Preferably, the pressing ring assembly includes an upper pressing ring 40, a lower pressing ring 41, and a plurality of die springs 42. The lower pressing ring 41 and the upper pressing ring 40 are sequentially sleeved on the core shaft 12 of the spindle 10, and the die springs 42 are pressed between the upper pressing ring 40 and the lower pressing ring 41.
[0046] Here, the number of die springs 42 in this embodiment can preferably be eight. The number of die springs 42 here is only an example and is not limited, and all are within the protection scope of this application.
[0047] For example, preferably, a plurality of mounting grooves 43 are formed on the lower pressing ring 41, and one end of the die spring 42 is mounted in the mounting groove 43. The mounting groove 43 can preferably be a counterbore.
[0048] Furthermore, the pressing ring assembly further includes a pressure adjusting ring 44, which is sleeved on the core shaft 12 of the spindle 10 and is pressed on the upper pressing ring 40 and the lower pressing ring 41.
[0049] The pressing ring assembly further includes a first radial adjusting ring 45, which is mounted at the center of the upper pressing ring 40 and is sleeved on the core shaft 12 of the spindle 10.
[0050] The pressing ring assembly further includes a second radial adjustment ring 46, which is installed at the center of the lower pressing ring and sleeved on the core shaft of the main shaft.
[0051] In addition, a second mounting step 13 is provided on the main shaft 10. The second mounting step 13 is located above the first mounting step 11, so that the second radial adjustment ring 46 is installed on the second mounting step 11.
[0052] According to the above structural description, the press-fitting tooling for the main shaft bearing of the present utility model can compress the die spring 42 in the middle of the mechanism to a specified height through the lock nut (i.e., the fastener 30). The first radial adjustment ring 45 and the second radial adjustment ring 46 that fit the bearing are spacers that are compatible with different outer diameters of the main shaft. Using them simultaneously or not installing them at the same time can ensure the maintenance of main shafts with different diameters. For example, the outer diameter of the Mazak main shaft when used simultaneously is 70, and the outer diameter of the Linkang main shaft without using the ring is 110.
[0053] Then, the upper pressing ring 40 contacts the fastener 30, and the lower pressing ring 41 contacts the main shaft bearing 20 to be locked. The pressing force is transmitted through the die spring 42 in the middle.
[0054] Replacing the first radial adjustment ring 45 and the second radial adjustment ring 46 between the upper and lower pressing rings can make the upper and lower pressing rings adapt to main shafts 10 with different diameter specifications.
[0055] The upper and lower pressing rings bear the reaction forces of multiple die springs 42 (for example, 8 die springs 42), so that the main shaft bearing 20 can always bear the axial force. By selecting pressure adjustment rings with different heights, the compression height of the die spring can be limited, thereby controlling the pressing force of the spring.
[0056] The working principle of the press-fitting tooling for the main shaft bearing of the present utility model is as follows: After the main shaft bearing 20 is installed, first install the lower pressing ring 41, and then install the pressure adjustment ring 44. After eight die springs 42 are inserted into the corresponding counterbores, install the upper pressing ring 40.
[0057] Finally, the lock nut (i.e., the fastener 30) is screwed onto the core shaft 12 of the main shaft 10. When the pressure adjustment ring 44 is tightened without looseness, the required kilonewtons are achieved.
[0058] The main shaft bearing 20 is always subjected to the axial force during the cooling process, and the slight thermal expansion and contraction do not affect the position accuracy of the main shaft bearing 20.
[0059] At the same time, during the cooling process, we use a magnetic dial indicator and a rubber hammer to adjust the radial runout of the spacer between the main shaft bearings 20 within 3 μm. After the bearing cools down, the spacer is pressed firmly by the bearings on both sides, avoiding the occurrence of the phenomenon of easily amplifying the radial runout.
[0060] To solve and balance the problem of bearing installation for two types of spindles, the present utility model has developed a multi-purpose spindle bearing pressing mechanism. The pressing tooling can be used when repairing Mazak spindles and is also compatible with the repair of Linkang spindles.
[0061] The pressing tooling ensures that there is no axial clearance after the bearing is heated and installed, and during the cooling process of the bearing, a continuous positive axial pressure can be maintained.
[0062] Throughout the process of ensuring the complete cooling of the bearing, there is no gap between the bearing and the spacer ring. After the position is fixed by borrowing the external thread on the mandrel for the fabricated tooling, 8 die springs are always under force to push the pressing ring axially towards the bearing until the bearing is completely cooled.
[0063] In addition, when designing the pressing tooling, the change in the inner diameter of the bearing when repairing different spindles is considered, so the compatibility with another specification of spindle after replacing the interchangeable bushing is also considered.
[0064] As Figure 1 shown, the first radial adjustment ring 45 and the second radial adjustment ring 46, as spacer rings, can be selected simultaneously or not simultaneously to change the outer diameter of different spindles to pre-press the inner diameter of the bearing. When fabricating the tooling, the inner diameter is all considered and guaranteed according to the tolerance.
[0065] In summary, the pressing tooling for the spindle bearing of the present utility model can be widely applied to various scenarios such as the replacement and repair of bearings for various equipment. Moreover, the pressing tooling does not require the configuration of a corresponding system and can provide a stable and continuous axial pressing force. At the same time, the pressing tooling also has the advantages of simple operation and being applicable to the installation of multiple types of spindle bearings.
[0066] For those skilled in the art, the above invention disclosure is only an example and does not constitute a limitation to this application. Although not explicitly stated here, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are proposed in this application, so such modifications, improvements, and corrections still fall within the spirit and scope of the exemplary implementation mode of this application.
[0067] At the same time, specific terms are used in this application to describe the embodiments of this application. Such as "one embodiment", "an embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of this application.
[0068] Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more at different positions in this specification does not necessarily refer to the same embodiment.
[0069] In addition, certain features, structures, or characteristics in one or more embodiments of the present application may be appropriately combined.
[0070] Similarly, it should be noted that, in order to simplify the description of the present application and thus help understand one or more embodiments of the invention, in the foregoing description of the embodiments of the present application, sometimes multiple features are grouped into one embodiment, drawing, or description thereof. However, this disclosure method does not mean that the features required by the subject matter of the present application are more than those mentioned in the claims. In fact, the features of the embodiments are fewer than all the features of the single embodiment disclosed above.
[0071] Although the specific embodiments of the present utility model have been described above, those skilled in the art should understand that these are only examples, and the protection scope of the present utility model is defined by the appended claims. Without departing from the principle and essence of the present utility model, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present utility model.
Claims
1. A press-fitting tooling for a spindle bearing, characterized in that, The press-fitting tooling for the spindle bearing includes: a spindle, a spindle bearing, a pressing ring assembly, and a fastener. A first mounting step is provided on the spindle. The spindle bearing is mounted on the first mounting step. The pressing ring assembly is sleeved on the mandrel of the spindle and press-fitted on the spindle bearing. The fastener is fixed on the mandrel of the spindle to press the pressing ring assembly and the spindle bearing tightly, so that the spindle bearing always bears an axial force.
2. The press-fitting tooling for a spindle bearing according to claim 1, characterized in that, The pressing ring assembly includes an upper pressing ring, a lower pressing ring, and a plurality of die springs. The lower pressing ring and the upper pressing ring are sequentially sleeved on the mandrel of the spindle, and the die springs are pressed between the upper pressing ring and the lower pressing ring.
3. The press-fitting tooling for a spindle bearing according to claim 2, characterized in that, A plurality of mounting grooves are formed in the lower pressing ring, and one end of the die spring is mounted in the mounting groove.
4. The press-fitting tooling for a spindle bearing according to claim 3, wherein, The mounting groove is a counterbore.
5. The press-fitting tooling for a spindle bearing according to claim 2, characterized in that, The pressing ring assembly further includes a pressure adjustment ring which is sleeved on the mandrel of the spindle and pressed between the upper pressing ring and the lower pressing ring.
6. The press-fitting tooling for the spindle bearing according to claim 2, characterized in that, The pressing ring assembly further includes a first radial adjustment ring which is mounted at the center of the upper pressing ring and sleeved on the mandrel of the spindle.
7. The press-fitting tooling for a spindle bearing according to claim 2, wherein The pressing ring assembly further includes a second radial adjustment ring which is mounted at the center of the lower pressing ring and sleeved on the mandrel of the spindle.
8. The press-fitting tooling for a spindle bearing according to claim 7, characterized in that, A second mounting step is provided on the spindle, and the second mounting step is located above the first mounting step. The second radial adjustment ring is mounted on the second mounting step.
9. The press-fitting tooling for a spindle bearing according to claim 1, characterized in that The fastener is a lock nut.
10. The press-fitting tooling for a spindle bearing according to claim 2, characterized in that, The number of the die springs is eight.