Bearing grease injection mold
By designing a bearing grease injection mold and grease injection method, the problem of uneven grease injection in irregularly shaped bearings was solved, achieving uniform distribution of grease inside the bearing and efficient grease injection, thereby improving the bearing's operational stability and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BAHUAN BEARING CHANGXING CO LTD
- Filing Date
- 2025-08-13
- Publication Date
- 2026-08-04
AI Technical Summary
Existing technologies make it difficult to achieve accurate and uniform grease injection in irregularly shaped bearings, especially under the special structure of irregularly shaped bearings, the amount and location of grease injection are difficult to meet the requirements, resulting in low efficiency and uneven grease injection.
Design a bearing grease injection mold, including a grease injection mold, a radial positioning component, and a grease injection ring. The grease injection mold fits into the bearing end face through its mating end, the radial positioning component matches the bearing inner/outer diameter, the grease injection ring is embedded between the bearing inner ring and the cage or between the outer ring and the cage, and the grease injection hole connects to the grease injection channel to ensure that the grease is accurately injected into the raceway and the middle position of the two rows of balls.
This method achieves uniform distribution of grease inside the irregularly shaped bearing, improves the accuracy and efficiency of grease injection, meets the precise requirements of irregularly shaped bearings for grease quantity and position, and ensures stable bearing operation.
Smart Images
Figure CN224593054U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of mechanical lubrication, and in particular to a bearing grease injection mold. Background Technology
[0002] In the field of mechanical engineering, bearings, as a key component, are widely used in various rotating machinery and equipment. Their performance directly affects the operating efficiency and service life of the equipment. Especially in high-speed, high-temperature, and high-load operating environments, bearing lubrication becomes particularly important. Good lubrication can reduce internal friction and wear, lower operating temperature, and improve the bearing's operational accuracy and reliability, thereby ensuring the stable operation of the entire mechanical equipment. With the continuous development of industrial technology, the performance requirements for bearings are becoming increasingly stringent, especially for irregularly shaped bearings with special structures and shapes, where lubrication presents even greater challenges.
[0003] In the past, there have been several common practices for lubricating irregularly shaped bearings. One common method is to use a general-purpose grease injection mold, which is usually not designed for specific irregularly shaped bearings and simply injects grease into the bearing. Another method is to manually inject grease between the raceways and balls of the bearing using tools such as syringes, but this method is less efficient. Additionally, some methods use ordinary grease injection equipment and follow a standardized grease injection procedure, without considering the special structure and grease injection requirements of irregularly shaped bearings.
[0004] However, these existing technologies have significant drawbacks. Due to the special structure of irregularly shaped bearings, it is difficult to ensure the accuracy and uniformity of grease injection volume using general-purpose grease injection molds, failing to meet the precise requirements of irregularly shaped bearings for grease volume and injection location. Manual grease injection is not only inefficient but also struggles to guarantee consistency in each injection, easily resulting in insufficient or excessive grease injection. Ordinary grease injection equipment cannot accommodate the narrow space between the inner diameter of the outer ring and the outer diameter of the cage in irregularly shaped bearings, making it difficult to accurately inject grease into the raceway and the area between the two rows of balls. Utility Model Content
[0005] In order to accurately inject grease into the bearing, this application provides a bearing grease injection mold and a grease injection method.
[0006] Firstly, this application provides a bearing grease injection mold, which adopts the following technical solution: A bearing grease injection mold includes a grease injection mold, a radial positioning component, and a grease injection ring. One end of the grease injection mold is designed as a fitting end, which is used to fit against the end face of the bearing. The other end of the grease injection mold is provided with a grease injection groove, and the bottom of the grease injection groove is provided with a grease flow channel. The radial positioning element is connected to the grease injection mold and is used to mate with the inner / outer diameter of the bearing. The grease injection ring is connected to the mating end. The end of the grease injection ring away from the mating end is used to be fitted between the inner ring and the cage of the bearing, or the end of the grease injection ring away from the mating end is used to be fitted between the outer ring and the cage of the bearing. The grease injection ring is provided with a grease injection hole, which is connected to the grease injection channel.
[0007] By adopting the above technical solution, the fitting end of the grease injection mold can achieve axial positioning by fitting with the bearing end face, and the radial positioning part can achieve radial positioning by fitting with the bearing inner / outer diameter. The grease injection ring is embedded between the bearing inner ring and the cage or between the outer ring and the cage, and the grease injection hole is connected to the grease injection channel, which allows grease to be injected into the bearing interior (between the raceway and the two rows of balls) from the gap between the outer diameter of the inner ring and the inner diameter of the cage or between the inner diameter of the outer ring and the outer diameter of the cage, thus meeting the bearing grease injection requirements.
[0008] Preferably, the grease injection ring includes an insert ring and a embedding ring. The insert ring is connected to the mating end and is used to fit between the inner and outer rings of the bearing. The insertion ring is connected to the end of the embedded ring away from the mating end, and the grease injection hole passes through the embedded ring and the insertion ring. When the end of the grease ring furthest from the mating end is used to fit between the inner ring and the cage of the bearing, the insertion ring is used to fit between the inner ring and the cage of the bearing. When the end of the grease ring furthest from the mating end is used to be fitted between the outer ring and the cage of the bearing, the insertion ring is used to be fitted between the outer ring and the cage of the bearing.
[0009] By adopting the above technical solution, the insert ring can be embedded between the inner and outer rings of the bearing, or between the inner ring and the cage, or between the outer ring and the cage, ensuring that grease can be accurately injected into the bearing through the gap between the inner and outer rings or the cage. Compared to needle-shaped insert rings, annular insert rings have better strength.
[0010] Preferably, the width of the end of the grease injection ring furthest from the mating end is L, and the inner diameter of the grease injection hole is D, where 3D < L < 4D.
[0011] By adopting the above technical solution, the grease injection hole has a larger inner diameter under the space constraints of the bearing inner ring, outer ring and cage, ensuring that the grease can be injected into the bearing more smoothly through the grease injection hole, which is conducive to completing the grease injection more efficiently.
[0012] Preferably, the mating end is used to mat with the end face of the inner ring of the bearing, and the mating end is used to mat with the end face of the outer ring of the bearing.
[0013] By adopting the above technical solution, the mating end is simultaneously mated to the inner ring and outer ring of the bearing, thereby achieving the positioning between the inner ring and the outer ring of the bearing and ensuring the gap between the inner ring and the outer ring of the bearing. This facilitates the insertion of the grease ring between the inner ring and the cage of the bearing or between the outer ring and the cage of the bearing.
[0014] Preferably, the number of grease injection holes is twice the number of steel balls in a single row.
[0015] By adopting the above technical solution, the grease can enter the space between the raceways, between the balls, and between the two rows of balls, and the grease is evenly distributed inside the bearing.
[0016] Preferably, the inner diameter of the grease injection hole is 0.3 mm.
[0017] By adopting the above technical solution, even with the space constraints of the bearing's inner ring, outer ring, and cage, sufficient grease can be injected into the bearing.
[0018] Preferably, the grease injection hole is formed by electrical discharge machining.
[0019] By adopting the above technical solution, the dimensional and positional accuracy of the grease injection hole is guaranteed.
[0020] Secondly, this application provides a bearing grease injection method, which adopts the following technical solution: A bearing grease injection method includes: injecting 1 / 2 the amount of grease into surface A of the bearing, flipping the bearing over, and injecting 1 / 2 the amount of grease into surface B of the bearing.
[0021] By adopting the above technical solution, the requirement of injecting a specified amount of grease into each of the two raceways of the bearing can be met, so that the grease inside the bearing is evenly distributed.
[0022] Preferably, the amount of grease injected is 30% ± 3% of the internal space volume of the bearing.
[0023] By adopting the above technical solution, the requirements for grease injection volume during bearing grease injection can be met, achieving the goal of satisfying both the grease injection volume and the balanced grease injection volume of the two raceways.
[0024] Preferably, before injecting 1 / 2 the amount of grease into bearing A surface, the bearing is weighed. The steps include filling bearing A with 1 / 2 the amount of grease between the bearing surface and the bearing flipping surface, and weighing the bearing. After applying half the amount of grease to bearing B, weigh the bearing.
[0025] By adopting the above technical solution, the bearing is weighed multiple times during the grease injection process, which can accurately control the amount of grease injected and ensure that the amount of grease injected is 30% ± 3% of the internal space volume of the bearing, thus meeting the requirements for the amount of grease injected into the bearing and ensuring that the amount of lubricating grease inside the bearing meets the standard.
[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The fitting end of the grease injection mold fits against the bearing end face, and the radial positioning part matches the inner / outer diameter of the bearing, playing a role in axial and radial positioning, which facilitates accurate grease injection; 2. The grease injection ring is equipped with grease injection holes, the number of which is twice the number of steel balls in a single row. This allows the grease to enter the raceway, the space between the balls, and the space between the two rows of balls, resulting in a uniform distribution of the grease. 3. The inner diameter of the grease injection hole is 0.3mm and is machined by electrical discharge machining to ensure the dimensional and positional accuracy of the grease injection hole. Under air pressure, the grease can be injected into the bearing, which meets the grease injection requirements of the narrow space of the outer ring inner diameter and cage outer diameter of irregular bearings. 4. The grease injection method involves injecting 1 / 2 the amount of grease into the A side of the bearing and then injecting 1 / 2 the amount of grease into the B side after flipping it over. The amount of grease injected is 30% ± 3% of the internal space volume of the bearing, which can meet the requirements of grease injection for irregularly shaped bearings and balanced grease injection for the two raceways. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of an irregularly shaped bearing; Figure 2 This is a schematic diagram of a bearing grease injection mold; Figure 3 This is a schematic diagram of a grease injection head; Figure 4 This is a schematic diagram of a grease injection head and a non-circular bearing; Figure 5 yes Figure 4 Enlarged view of point A in the middle; Figure 6 This is a schematic diagram of grease injection on side A; Figure 7 This is a schematic diagram of grease injection on side B; Explanation of reference numerals in the attached drawings: 1. Grease injection mold; 11. Grease injection groove; 12. Grease injection channel; 2. Radial positioning component; 3. Grease injection ring; 31. Embedded ring; 32. Insertion ring; 33. Grease injection hole; 91. Outer ring; 92. Inner ring; 93. Steel ball; 94. Cage; 95. Sealing ring; 96. Grease injection space. Detailed Implementation
[0028] The present application will be further described in detail below with reference to the accompanying drawings.
[0029] Reference Figure 1 and Figure 2 This application discloses a bearing grease injection mold, including a grease injection head. The grease injection head includes a grease injection mold 1 and a radial positioning member 2.
[0030] One end of the grease injection mold 1 is designated as the mating end, which is used to mat with the end face of the bearing. Specifically, the mating end is used to mat with the end face of the inner ring 92 of the bearing, and the mating end is also used to mat with the end face of the outer ring 91 of the bearing.
[0031] The other end of the grease injection mold 1 is provided with a grease injection groove 11, and the bottom of the grease injection groove 11 is provided with a grease injection channel 12. Specifically, the grease injection channel 12 is annular.
[0032] Radial positioning element 2 is connected to grease injection mold 1 and is used to mate with the inner / outer diameter of the bearing. When radial positioning element 2 mates with the inner / outer diameter of the bearing, the grease injection channel 12 is coaxial with the bearing. Radial positioning element 2 can be integrally formed with grease injection mold 1.
[0033] In the attached diagram: Since the end faces of the irregular bearing are asymmetrical, there are two grease injection heads, which correspond to the two ends of the irregular bearing respectively; at the same time, the radial positioning member 2 is fixedly connected to the mating end. The radial positioning member 2 is used to cooperate with the inner diameter of the bearing, that is, the radial positioning member 2 is used to coaxially fit into the inner ring 92.
[0034] Reference Figure 2 and Figure 3 The grease injection head also includes a grease injection ring 3. The grease injection ring 3 is fixedly connected to the mating end and is coaxial with the grease injection channel 12. The grease injection ring 3 can be integrally formed with the grease injection mold 1. The end of the grease injection ring 3 away from the mating end is used to be fitted between the inner ring 92 and the cage 94 of the bearing, or the end of the grease injection ring 3 away from the mating end is used to be fitted between the outer ring 91 and the cage 94 of the bearing.
[0035] Reference Figure 3 and Figure 4 The grease injection ring 3 includes an insert ring 31 and an insertion ring 32. The insert ring 31 is connected to the mating end and is used to fit between the inner ring 92 and the outer ring 91 of the bearing, and there is no contact between the insert ring 31 and the inner ring 92 or between the insert ring 31 and the outer ring 91. The insertion ring 32 is connected to the end of the insert ring 31 that is away from the mating end.
[0036] When the end of the grease ring 3 furthest from the mating end is used to be fitted between the inner ring 92 and the cage 94 of the bearing: the insertion ring 32 is used to be fitted between the inner ring 92 and the cage 94 of the bearing, and there is no contact between the insertion ring 32 and the inner ring 92, or between the insertion ring 32 and the cage 94.
[0037] When the end of the grease ring 3 away from the mating end is used to be inserted between the outer ring 91 and the cage 94 of the bearing: the insertion ring 32 is used to be inserted between the outer ring 91 and the cage 94 of the bearing, and there is no contact between the insertion ring 32 and the outer ring 91, or between the insertion ring 32 and the cage 94.
[0038] In the attached diagram: the insert ring 32 is used to fit between the outer ring 91 of the bearing and the cage 94.
[0039] Reference Figure 4 and Figure 5 The grease injection ring 3 is provided with grease injection holes 33, which are connected to the grease injection channel 12. The grease injection holes 33 pass through the embedded ring 31 and the insertion ring 32. Multiple grease injection holes 33 are provided at intervals along the circumference of the grease injection ring 3; preferably, the number of grease injection holes 33 is twice the number of single-row steel balls 93.
[0040] For example, in the attached diagram: the irregular bearing is a double-row ball bearing, the total number of steel balls 93 is 2N, then the number of steel balls 93 in a single row is K=2N / 2, and the number of grease holes 33 is 2K.
[0041] The width of the insertion ring 32 (i.e., the end of the grease injection ring 3 furthest from the mating end) is L, and the inner diameter of the grease injection hole 33 is D, where 3D < L < 4D. In one embodiment, D = 0.3 mm; meanwhile, the grease injection hole 33 is machined by electrical discharge machining to ensure dimensional and positional accuracy.
[0042] The implementation principle of a bearing grease injection mold according to an embodiment of this application is as follows: axial positioning is achieved by the mating end of the grease injection mold 1 fitting against the bearing end face, and radial positioning is achieved by the radial positioning component 2 cooperating with the bearing's inner / outer diameter, ensuring accurate installation of the mold and the bearing. The embedding ring 31 and insert ring 32 of the grease injection ring 3 can be accurately embedded into specific positions inside the bearing. The grease injection hole 33 is connected to the grease injection channel 12, allowing grease to enter the bearing raceway and between the two rows of balls from the grease injection groove 11 through the grease injection channel 12 and the grease injection hole 33. The number and inner diameter design of the grease injection holes 33 ensure that the grease can be evenly distributed in the raceway and between the balls in a single row, meeting the precise requirements of irregularly shaped bearings for grease quantity and injection position, achieving more accurate and uniform grease injection into the bearing, and improving the quality and efficiency of grease injection.
[0043] Reference Figure 6 and Figure 7 This application also discloses a bearing grease injection method, including... S1, Bearing weighing: Use a high-precision scale to weigh the ungreased bearing and record the initial weight; S2, inject 1 / 2 grease into bearing A surface: Attach the fitting end of a grease injection head to the end face of bearing A surface, and align the radial positioning part 2 with the bearing's inner / outer diameter to achieve accurate installation of the mold and bearing; inject grease into the grease injection groove 11, and use air pressure to allow the grease to enter the bearing's raceway and between the two rows of balls through the grease injection channel 12 and grease injection hole 33, with the grease injection amount controlled by a metering valve; S3, Bearing Weighing: Weigh the bearing again after applying grease to surface A, record the weight, and compare it with the initial weight to check if the amount of grease applied to surface A meets the requirements; if the amount of grease applied does not meet the requirements, make the corresponding adjustments. S4, Bearing flipping: Flip the bearing after applying grease to side A, in preparation for applying grease to side B; S5, inject 1 / 2 the amount of grease into bearing B side. Repeat step S2, placing the other grease injector against bearing B side to inject grease; S6, Bearing Weighing: Use the scale to weigh the bearing after applying grease to side B for the last time, record the final weight, and check whether the total amount of grease applied meets the requirements by comparing it with the initial weight. If the amount of grease applied does not meet the requirements, the bearing needs to be treated, such as adding or removing some grease.
[0044] The amount of grease injected is 30% ± 3% of the internal volume of the bearing, and the amount is converted into the mass of the grease based on the density of the grease.
[0045] The implementation principle of a bearing grease injection method according to an embodiment of this application is as follows: The grease volume is precisely controlled through multiple weighings to ensure it meets the requirements of the irregularly shaped bearing. Grease is injected separately on surface A and surface B to ensure even grease injection into both raceways. A grease injection mold is used during the grease injection process. Utilizing the positioning and injection functions of the mold, the grease is accurately injected into the bearing raceways and between the two rows of balls, achieving more precise control over the grease volume and injection position, improving the accuracy and uniformity of grease injection, and ensuring the lubrication effect and performance of the irregularly shaped bearing.
[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A bearing grease injection mold, characterized in that, It includes a grease injection mold (1), a radial positioning component (2), and a grease injection ring (3). One end of the grease injection mold (1) is a fitting end, which is used to fit with the end face of the bearing. The other end of the grease injection mold (1) is provided with a grease injection groove (11), and a grease injection channel (12) is provided at the bottom of the grease injection groove (11). The radial positioning element (2) is connected to the grease injection mold (1), and the radial positioning element (2) is used to mate with the inner / outer diameter of the bearing. The grease ring (3) is connected to the mating end. The end of the grease ring (3) away from the mating end is used to be embedded between the inner ring and the cage of the bearing, or the end of the grease ring (3) away from the mating end is used to be embedded between the outer ring and the cage of the bearing. The grease ring (3) is provided with a grease injection hole (33), which is connected to the grease injection channel (12).
2. The bearing grease injection mold according to claim 1, characterized in that, The grease injection ring (3) includes an embedded ring (31) and an insert ring (32). The insert ring (31) is connected to the mating end, and the insert ring (31) is used to be fitted between the inner ring and the outer ring of the bearing. The insertion ring (32) is connected to the end of the embedded ring (31) away from the mating end, and the grease injection hole (33) passes through the embedded ring (31) and the insertion ring (32). When the end of the grease ring (3) away from the mating end is used to fit between the inner ring and the cage of the bearing, the insertion ring (32) is used to fit between the inner ring and the cage of the bearing. When the end of the grease ring (3) away from the mating end is used to be fitted between the outer ring of the bearing and the cage, the insertion ring (32) is used to be fitted between the outer ring of the bearing and the cage.
3. The bearing grease injection mold according to claim 1, characterized in that, The width of the end of the grease injection ring (3) away from the fitting end is L, and the inner diameter of the grease injection hole (33) is D, where 3D < L < 4D.
4. The bearing grease injection mold according to claim 1, characterized in that, The fitting end is used to fit against the end face of the inner ring of the bearing, and the fitting end is used to fit against the end face of the outer ring of the bearing.
5. The bearing grease injection mold according to claim 1, characterized in that, The number of grease injection holes (33) is twice the number of single-row steel balls.
6. The bearing grease injection mold according to claim 1, characterized in that, The inner diameter of the grease injection hole (33) is 0.3 mm.
7. The bearing grease injection mold according to claim 1, characterized in that, The grease injection hole (33) is formed by electrical discharge machining.