A split telescopic press unit and device

Abstract

The application relates to the technical field of press-fitting, in particular to a split telescopic press-fitting unit and device. The split telescopic press-fitting unit is used for press-fitting a dust cover on a bearing outer ring; the split telescopic press-fitting unit comprises a press shell, a material taking block and an elastic driving piece; the press shell comprises a shell body, a press-fitting surface and a grease storage cavity; the material taking block comprises a movable block and a grease outlet hole; the movable block is columnar; the outer peripheral wall of the movable block is in sliding fit with the inner peripheral wall of the shell body; the grease outlet hole penetrates through the middle part of the movable block in the axial direction of the movable block; in the process that the material taking block picks up the protective cover, the outer peripheral wall of the movable block can be clamped with the inner peripheral wall of the dust cover; when the shell body and the movable block slide relative to each other, the press-fitting surface can push out the dust cover clamped on the movable block; the elastic driving piece is connected with the shell body and the movable block respectively; the elastic driving piece applies an elastic force to the movable block; thereby, the problem that the bearing assembly efficiency is low is solved.

Description

Technical Field

[0001] This application relates to the field of press-fitting technology, and more specifically, to a split telescopic press-fitting unit and device. Background Technology

[0002] Bearings are core transmission components widely used in various mechanical equipment. In the bearing assembly and production process, grease injection and dust cover press-fitting are two key processes that directly determine the bearing's lubrication effect and protective performance. The grease injection and dust cover press-fitting of the bearing outer ring are carried out in separate, independent steps. The grease injection process typically uses a metered grease injection device. The grease gun is aimed at the raceway cavity of the bearing outer ring, and a pre-set dosage of grease is precisely injected. The grease forms a continuous lubricating film between the bearing rolling elements and the inner and outer raceways, effectively reducing the coefficient of friction, minimizing component wear and operating noise, while also providing heat dissipation and rust prevention. The dust cover press-fitting process uses specialized press-fitting equipment. The dust cover is placed in the mounting groove at the end of the bearing outer ring, and a uniform and stable axial pressure is applied by the press head to achieve an interference fit between the dust cover and the bearing outer ring. This prevents external dust, moisture, and solid impurities from entering the bearing, protecting the grease from contamination and ensuring the normal operation of the internal moving parts of the bearing.

[0003] However, the aforementioned step-by-step, independent operation mode requires multiple transfers and repositioning of the dust cover and bearing outer ring during assembly, increasing the handling and positioning time for both. Because the two processes cannot be performed synchronously, the production cycle time of the entire bearing assembly process is significantly lengthened, making continuous production difficult. In high-volume bearing assembly production scenarios, the bottleneck in production efficiency of this process is particularly pronounced, severely restricting the overall capacity improvement of the bearing assembly production line. Summary of the Invention

[0004] To address the problem of low bearing assembly efficiency, this application provides a split telescopic press-fitting unit and device.

[0005] In a first aspect, this application provides a split-type telescopic press-fitting unit, which is used to press a dust cover onto the outer ring of a bearing; the split-type telescopic press-fitting unit includes:

[0006] A pressure shell, comprising a shell, a pressing surface, and a grease storage cavity; the shell is cylindrical; the pressing surface is the outer end face of the shell; and the grease storage cavity is the inner cavity of the shell.

[0007] The material-receiving block includes a movable block and a grease outlet; the movable block is cylindrical; the outer peripheral wall of the movable block slides against the inner peripheral wall of the housing; one axial end of the movable block is a connecting end, and the other end is a material-receiving end; the connecting end is located inside the housing; the material-receiving end can pass through and out of the housing from the end where the pressing surface is provided; the grease outlet extends through the middle of the movable block along its axial direction; during the process of the material-receiving block picking up the protective cover, the outer peripheral wall of the movable block can engage with the inner peripheral wall of the dust cover; when the housing and the movable block slide relative to each other, the pressing surface can push out the dust cover engaged on the movable block;

[0008] An elastic drive member is connected to the housing and the movable block respectively; the elastic drive member applies an elastic force to the movable block so that the movable block tends to protrude from the end of the housing where the press-fit surface is provided.

[0009] Optionally, the material taking block further includes a lubrication groove; the lubrication groove is located on the outer peripheral wall of the movable block that fits against the housing; the lubrication groove extends to the material taking end; during the sliding of the movable block into the housing, the lubrication groove can communicate with the grease storage cavity.

[0010] Optionally, the housing has a first inner peripheral wall and a second inner peripheral wall; the second inner peripheral wall is located between the first inner peripheral wall and the pressing surface; the diameter of the second inner peripheral wall is smaller than the diameter of the first inner peripheral wall; the first inner peripheral wall is the wall surface of the grease storage cavity;

[0011] The movable block includes a limiting plate and a guide block; the limiting plate is connected to the guide block; the diameter of the limiting plate is larger than the diameter of the second inner peripheral wall; the limiting plate is located inside the housing; the guide block slides against the second inner peripheral wall; when the material picking end extends to the farthest distance from the housing, the elastic drive member presses the limiting plate tightly against the step where the first inner peripheral wall and the second inner peripheral wall meet.

[0012] Optionally, the minimum elastic force during the extension and retraction of the elastic drive is greater than the maximum resistance during the process of the material picking block picking up the protective cover, so that the flow between the lubrication groove on the movable block and the grease storage cavity is cut off during the process of the material picking block picking up the protective cover.

[0013] Optionally, the center of the end face of the limiting plate opposite to the guide block is convex.

[0014] Optionally, one end of the outer ring of the bearing is closed, and the other end is open;

[0015] The split telescopic pressing unit also includes a limiting rod; the limiting rod is parallel to the axis of the movable block; the limiting rod is connected to the material-taking end of the movable block; the end of the limiting rod away from the movable block is an abutting end; the abutting end is located on the outside of the housing and has a gap with the material-taking end; the limiting rod has an oil guide hole; the oil guide hole passes through the limiting rod along its length.

[0016] Optionally, the ratio of the distance between the abutting end and the material taking end to the axial depth of the bearing outer ring is between 70% and 95%.

[0017] Optionally, the pressure shell further includes a grease injection vent hole; the grease injection vent hole is located on the circumferential wall of the pressure shell; the grease injection vent hole connects the grease storage cavity with the outside of the shell.

[0018] Optionally, the diameter of the grease injection vent hole satisfies the following formula:

[0019] 2d / (D+h)=k; k is 0.05~0.15; where d is the diameter of the grease injection and venting hole; D is the diameter of the grease storage cavity; and h is the axial height of the grease storage cavity.

[0020] Secondly, this application provides a pressing device, the pressing device comprising:

[0021] The split telescopic press-fitting unit as described in any one of the first aspects;

[0022] A press-fitting drive unit is connected to a press shell; the press-fitting drive unit drives the press shell to move along the sliding direction of the material taking block;

[0023] The first feeding unit is used to supply the dust cover; the first feeding unit is located below the split telescopic pressing unit; the first feeding unit is slidably arranged horizontally.

[0024] The second feeding unit is used to supply the outer ring of the bearing.

[0025] To address the problem of low bearing assembly efficiency, this application has the following advantages:

[0026] The material is removed by engaging the inner wall of the dust cover with the outer wall of the movable block. During the removal process, the grease is stored in the grease reservoir, preventing leakage. When the housing and the movable block slide relative to each other, the pressing surface pushes the dust cover engaged with the movable block out to complete the pressing. Simultaneously, the grease reservoir is pressurized, and the grease is injected into the bearing outer ring through the grease outlet. This achieves simultaneous grease injection and dust cover pressing, ultimately solving the problem of low efficiency in the separate steps of injecting grease into the bearing outer ring and installing the bearing outer ring and dust cover, while effectively preventing grease leakage during the removal stage. Attached Figure Description

[0027] Figure 1 An isometric view of the split telescopic press-fitting unit of Embodiment 1 is shown;

[0028] Figure 2 It shows Figure 1 A front view of the split telescopic press-fitting unit;

[0029] Figure 3 It shows Figure 2 A cross-sectional view of the split telescopic press-fitting unit;

[0030] Figure 4 An isometric view of the press-fitting device of Embodiment 2 is shown.

[0031] Reference numerals: Split telescopic press-fitting unit 10; Press shell 11; Housing 111; First inner peripheral wall 1111; Second inner peripheral wall 1112; Press-fitting surface 112; Grease reservoir 113; Grease injection and venting hole 114; Material taking block 12; Movable block 121; Limiting plate 1211; Guide block 1212; Grease outlet hole 122; Lubrication groove 123; Elastic drive component 13; Limiting rod 14; Oil guide hole 15; Press-fitting drive unit 20; First feeding unit 30; Second feeding unit 40; Dust cover 50; Bearing outer ring 60. Detailed Implementation

[0032] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0033] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0034] In the bearing assembly process of pressing the dust cover 50 onto the bearing outer ring 60, it is impossible to complete the related actions of dust cover 50 pickup, grease storage and delivery, and dust cover 50 pressing using a single device. Therefore, the grease injection process of the bearing outer ring 60 and the dust cover 50 pressing process must adopt a separate operation mode, requiring separate grease injection equipment and dust cover 50 pressing equipment. After completing one of the processes, the workpiece needs to be transferred between different equipment and repositioned and calibrated. The two processes cannot be carried out in parallel, which adds extra material handling time and positioning adjustment time, significantly lengthening the production cycle of the entire bearing assembly process. This results in low efficiency of step-by-step operation, making it difficult to meet the capacity requirements of large-scale bearing assembly production. Therefore, to solve this problem, this application provides a split telescopic pressing unit 10 and device.

[0035] Example 1:

[0036] In this embodiment, a split telescopic press-fitting unit 10 is provided, which is used to press the dust cover 50 onto the outer ring 60 of the bearing.

[0037] like Figure 1 , Figure 2 , Figure 3 As shown, the split telescopic pressing unit 10 includes a pressing shell 11, a material taking block 12, and an elastic driving component 13.

[0038] The press housing 11 includes a housing 111, a press-fit surface 112, and a grease reservoir 113. The housing 111 is cylindrical to facilitate fitting with the circular contour of the bearing outer ring 60, ensuring uniform force distribution during press-fitting. The press-fit surface 112 is the outer end face of the housing 111, used to apply axial pressure to the dust cover 50, achieving an interference fit between the dust cover 50 and the bearing outer ring 60. The grease reservoir 113 is the inner cavity of the housing 111, used to store grease, providing storage space for the grease injection process, and capable of accommodating grease during material handling to prevent leakage.

[0039] The material-receiving block 12 includes a movable block 121 and a grease outlet 122. The movable block 121 is cylindrical, and its outer peripheral wall slides against the inner peripheral wall of the housing 111 to ensure coaxiality and sealing of relative movement, preventing grease from overflowing from the mating gap. One axial end of the movable block 121 is a connecting end, and the other end is a material-receiving end, with the connecting end located inside the housing 111. The material-receiving end can pass through and out of the end of the housing 111 where the press-fit surface 112 is provided, facilitating deep penetration into the dust cover 50 to complete the picking action. The grease outlet 122 extends axially through the middle of the movable block 121, providing a conveying channel for the grease in the grease reservoir 113 to the outer ring 60 of the bearing. During the process of the material-receiving block 12 picking up the protective cover, the outer peripheral wall of the movable block 121 can engage with the inner peripheral wall of the dust cover 50, achieving reliable fixation of the dust cover 50. When the housing 111 slides relative to the movable block 121, the pressing surface 112 can push out the dust cover 50 that is snapped on the movable block 121, so that the material picking and pressing actions can be connected step by step at the same station, reducing the time interval between processes.

[0040] The elastic drive member 13 is connected to both the housing 111 and the movable block 121. The elastic drive member 13 applies an elastic force to the movable block 121, causing it to tend to protrude from the end of the housing 111 where the pressing surface 112 is located. It should be understood that the elastic drive member 13 automatically drives the movable block 121 out of the housing 111 through the elastic force, completing the material preparation action without the need for an additional power mechanism. During the material handling process, the movable block 121 remains extended, keeping the grease reservoir 113 sealed and preventing accidental grease leakage. During the pressing process, the elastic drive member 13 is compressed, providing power for the automatic reset of the movable block 121 after pressing, facilitating the next cycle of operation.

[0041] In this embodiment, material removal is achieved by engaging the outer peripheral wall of the movable block 121 with the inner peripheral wall of the dust cover 50. During the material removal process, grease is stored in the grease reservoir 113. The elastic drive member 13 pushes at least part of the movable block 121 out of the housing 111 to ensure that the outer peripheral wall of the movable block 121 has space for material removal. Due to the low compression degree of the elastic member, grease is less likely to leak and be wasted during the material removal stage. When the housing 111 and the movable block 121 slide relative to each other, the pressing surface 112 can push out the dust cover 50 engaged on the movable block 121 to complete the pressing. At the same time, the grease reservoir 113 is under pressure, and grease is injected into the bearing outer ring 60 through the grease outlet 122. This achieves the simultaneous execution of the dust cover 50 material removal, grease injection, and dust cover 50 pressing process, ultimately solving the problem of low efficiency in the step-by-step operation of injecting grease into the bearing outer ring 60 and installing the bearing outer ring 60 and dust cover 50, while effectively avoiding grease leakage during the material removal stage.

[0042] Furthermore, the material-receiving block 12 also includes a lubrication groove 123. The lubrication groove 123 is located on the outer peripheral wall of the movable block 121 that fits against the housing 111, and extends to the material-receiving end. During the sliding process of the movable block 121 into the housing 111, the lubrication groove 123 can communicate with the grease storage cavity 113. Moreover, the sum of the cross-sectional areas of the lubrication grooves 123 is less than the cross-sectional area of ​​the grease outlet hole 122.

[0043] It should be understood that the lubrication groove 123 is located on the outer peripheral wall of the movable block 121 that fits against the housing 111, allowing the grease to act directly on the sliding mating surface of the movable block 121 and the housing 111, reducing the sliding friction resistance between them. The lubrication groove 123 extends to the feeding end, enabling the grease to be delivered to the contact area between the movable block 121 and the dust cover 50, preventing hard friction between the dust cover 50 and the movable block 121 during the pressing process, which could damage the movable block 121 or the dust cover 50. The lubrication groove 123 can only communicate with the grease reservoir 113 during the sliding process of the movable block 121 into the housing 111, and the grease supply is only realized during the pressing stage. During the feeding process, the movement of the elastic drive member 13 is very small or non-moving, and the lubrication groove 123 and the grease reservoir 113 do not form an effective communication, so the grease leakage is minimal or non-existent.

[0044] Furthermore, the housing 111 has a first inner peripheral wall 1111 and a second inner peripheral wall 1112. The second inner peripheral wall 1112 is located between the first inner peripheral wall 1111 and the press-fit surface 112, and the diameter of the second inner peripheral wall 1112 is smaller than the diameter of the first inner peripheral wall 1111. The first inner peripheral wall 1111 is the wall surface of the grease storage cavity 113.

[0045] It should be understood that the housing 111 is provided with a first inner peripheral wall 1111 and a second inner peripheral wall 1112 with different diameters, forming a stepped structure at the junction of the two, providing a matching reference for the axial positioning of the movable block 121. At the same time, the first inner peripheral wall 1111 serves as the wall surface of the grease storage cavity 113, ensuring the effective volume of the grease storage cavity 113.

[0046] The movable block 121 includes a limiting plate 1211 and a guide block 1212. The limiting plate 1211 is connected to the guide block 1212. The diameter of the limiting plate 1211 is larger than the diameter of the second inner peripheral wall 1112. The limiting plate 1211 is located inside the housing 111, preventing it from passing through the area of ​​the housing 111 where the second inner peripheral wall 1112 is located. The guide block 1212 slides against the second inner peripheral wall 1112, ensuring the coaxiality and stability of the axial movement of the movable block 121 and reducing swaying during movement. When the material-taking end extends the farthest distance out of the housing 111, the elastic drive member 13 presses the limiting plate 1211 tightly against the step where the first inner peripheral wall 1111 and the second inner peripheral wall 1112 meet. This allows the guide block 1212 to be limited by the limiting plate 1211, preventing the guide block 1212 from coming out of the housing 111. At the same time, this clamping state can also enhance the sealing of the grease storage chamber 113 during the material handling stage, reducing the risk of grease leakage.

[0047] Furthermore, the minimum elastic force value during the extension and retraction process of the elastic drive component 13 is greater than the maximum resistance value during the process of the picking block 12 picking up the protective cover, so that the flow between the lubrication groove 123 on the moving block 121 and the grease storage cavity 113 is cut off during the process of the picking block 12 picking up the protective cover.

[0048] It should be understood that by setting the relationship between the minimum elastic force value of the elastic drive member 13 during its extension and retraction process and the maximum resistance value of the material picking block 12 during its picking up of the dust cover 50, it can be ensured that the elastic drive member 13 will not be compressed and deformed due to the picking resistance when the material picking block 12 performs the picking action of the dust cover 50, thereby ensuring that the movable block 121 will not slide axially into the housing 111. This structural parameter ensures that throughout the entire process of the material picking block 12 picking up the dust cover 50, the lubrication groove 123 on the movable block 121 can never form a communication channel with the grease storage cavity 113, thereby preventing grease from flowing out of the lubrication groove 123 during material picking and avoiding unnecessary waste of grease.

[0049] Furthermore, such as Figure 3 As shown, the center of the end face of the limiting plate 1211 opposite to the guide block 1212 is convex. It should be understood that this allows for centering contact with the end center of the elastic drive member 13, ensuring the elastic drive member 13 remains centered. This guides the elastic drive member 13, preventing it from swaying during extension and retraction, and ensuring that its axial force is transmitted evenly and stably to the movable block 121. Simultaneously, the convex end face guides the flow direction of the grease in the grease reservoir 113, providing guidance and appropriate pressurization to ensure that the grease flows smoothly into the lubrication groove 123 during the movement of the movable block 121, providing continuous and effective lubrication to the sliding mating surfaces. The height or slope of the convex center of the limiting plate 1211 helps in the quantitative design of the grease flow into the lubrication groove 123; that is, the higher the convex center, the more grease can flow into the lubrication groove 123, and vice versa.

[0050] Furthermore, one end of the outer ring 60 of the bearing is closed, while the other end is open.

[0051] The split telescopic press-fit unit 10 also includes a limiting rod 14. The limiting rod 14 is parallel to the axis of the movable block 121, ensuring coaxiality of its axial movement and preventing interference with the outer ring 60 of the bearing. The limiting rod 14 is connected to the material-taking end of the movable block 121 and can move axially synchronously with the movable block 121, ensuring coordination of each action. The end of the limiting rod 14 furthest from the movable block 121 is the abutment end, located outside the housing 111 and spaced from the material-taking end. This abutment end allows it to contact the closed end of the outer ring 60 of the bearing before pressing the dust cover 50, thus limiting the bottom of the outer ring 60 and preventing it from being lifted during the pressing unit's repositioning process. The limiting rod 14 has an oil guide hole 15. The oil guide hole 15 extends through the limiting rod 14 along its length, providing a directional delivery channel for the grease. During the press-fitting of the dust cover 50, the grease can smoothly enter the interior of the bearing outer ring 60 through the oil guide hole 15 on the limiting rod 14, thus completing the precise injection of the grease.

[0052] At the same time, the length of the limiting rod 14 can accurately deliver grease to the bottom of the bearing outer ring 60, thereby improving the orderliness of grease injection.

[0053] Furthermore, the ratio of the distance between the contact end and the material take-up end to the axial depth of the bearing outer ring 60 is between 70% and 95%.

[0054] It should be understood that limiting the ratio of the distance between the abutment end and the material-taking end to the axial depth of the bearing outer ring 60 to within the range of 70% to 95% avoids the situation where the movable block 121 is only located on the outside of the bearing outer ring 60 when the ratio is too large. This allows the movable block 121 to enter the inner wall of the bearing outer ring 60, providing radial support to the dust cover 50 during the press-fitting process, thereby preventing axial movement of the dust cover 50 and ensuring the coaxiality and positional accuracy of the dust cover 50 during press-fitting. At the same time, this ratio greater than 70% ensures that the abutment end of the limiting rod 14 fully abuts against the bottom of the bearing outer ring 60, ensuring that the limiting rod 14 can stably play a limiting role and prevent the bearing outer ring 60 from being lifted during the upward reset process of the press-fitting unit.

[0055] Furthermore, the pressure shell 11 also includes a grease injection vent 114. The grease injection vent 114 is located on the circumferential wall of the pressure shell 11. The grease injection vent 114 connects the grease storage cavity 113 with the outer side of the shell 111.

[0056] It should be understood that the grease injection vent 114 has a dual function as both an oil injection channel and a venting channel. Located on the circumferential wall of the pressure shell 11, the grease injection vent 114 facilitates the replenishment of grease into the grease reservoir 113 by external grease injection equipment, while ensuring smooth transmission of gas and pressure. Connecting the grease reservoir 113 to the outside of the shell 111, the grease injection vent 114 balances the pressure difference between the inside of the grease reservoir 113 and the outside during the extension and retraction of the movable block 121, preventing excessive grease leakage due to large pressure changes. By using the grease injection vent 114 to release pressure, the amount of grease discharged can be precisely controlled, ensuring the stability of the grease injection volume.

[0057] Furthermore, the diameter of the grease injection vent 114 satisfies the following formula:

[0058] 2d / (D+h)=k; k is 0.05~0.15; where d is the diameter of the grease injection and venting hole 114; D is the diameter of the grease storage cavity 113; and h is the axial height of the grease storage cavity 113.

[0059] It should be understood that this formula can accurately calculate the diameter of the grease vent hole 114 to suit different sizes of grease reservoirs 113, thus avoiding the problem of the grease vent hole 114 being too large or too small. It is worth noting that if the grease vent hole 114 is too large, it will cause excessive air pressure leakage inside the grease reservoir 113, failing to create sufficient pressure to push the grease out. If the grease vent hole 114 is too small, it will prevent the pressure inside the grease reservoir 113 from being released in time, hindering the normal discharge of grease. The grease vent hole 114 calculated according to this formula is of a suitable size, accurately balancing the air pressure changes inside the grease reservoir 113, which helps improve the quantitative design of grease discharge to the lubrication groove 123, further ensuring that the grease can be discharged stably and quantitatively.

[0060] Example 2:

[0061] In this embodiment, a pressing device is provided, such as... Figure 4 As shown, the pressing device includes a split telescopic pressing unit 10, a pressing drive unit 20, a first feeding unit 30, and a second feeding unit 40.

[0062] The press-fit drive unit 20 is connected to the press shell 11, and the press-fit drive unit 20 drives the press shell 11 to move along the sliding direction of the material taking block 12. The press-fit drive unit 20 provides stable and controllable power for the axial movement of the press shell 11, drives the press shell 11 to slide relative to the material taking block 12, and provides the required axial pressure for the press-fit of the dust cover 50 and the injection of grease.

[0063] The first feeding unit 30 is used to supply the dust cover 50. The first feeding unit 30 is located below the split telescopic pressing unit 10 and is slidably arranged horizontally. The first feeding unit 30 can accurately transport the dust cover 50 to the picking station, which facilitates the picking block 12 to complete the picking action, and at the same time realizes continuous feeding, avoiding interference with the pressing action.

[0064] The second feeding unit 40 is used to supply the bearing outer ring 60. The second feeding unit 40 can automatically supply the bearing outer ring 60 to be assembled to the designated assembly station, and cooperate with other units to realize the automated operation of the entire assembly process.

[0065] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the scope of this disclosure.

Claims

1. A split telescopic press-fitting unit, characterized in that, The split telescopic press-fit unit is used to press the dust cover onto the outer ring of the bearing; the split telescopic press-fit unit includes: A pressure shell, comprising a shell, a pressing surface, and a grease storage cavity; the shell is cylindrical; the pressing surface is the outer end face of the shell; and the grease storage cavity is the inner cavity of the shell. The material-receiving block includes a movable block and a grease outlet; the movable block is cylindrical; the outer peripheral wall of the movable block slides against the inner peripheral wall of the housing; one axial end of the movable block is a connecting end, and the other end is a material-receiving end; the connecting end is located inside the housing; the material-receiving end can pass through and out of the housing from the end where the pressing surface is provided; the grease outlet extends through the middle of the movable block along its axial direction; during the process of the material-receiving block picking up the protective cover, the outer peripheral wall of the movable block can engage with the inner peripheral wall of the dust cover; when the housing and the movable block slide relative to each other, the pressing surface can push out the dust cover engaged on the movable block; An elastic drive member is connected to the housing and the movable block respectively; the elastic drive member applies an elastic force to the movable block so that the movable block tends to protrude from the end of the housing where the press-fit surface is located.

2. The split telescopic press-fitting unit according to claim 1, characterized in that, The material taking block also includes a lubrication groove; the lubrication groove is located on the outer peripheral wall of the movable block that fits against the housing; the lubrication groove extends to the material taking end; during the sliding of the movable block into the housing, the lubrication groove can communicate with the grease storage cavity.

3. The split telescopic press-fitting unit according to claim 2, characterized in that, The housing has a first inner peripheral wall and a second inner peripheral wall; the second inner peripheral wall is located between the first inner peripheral wall and the pressing surface; the diameter of the second inner peripheral wall is smaller than the diameter of the first inner peripheral wall; the first inner peripheral wall is the wall surface of the grease storage cavity; The movable block includes a limiting plate and a guide block; the limiting plate is connected to the guide block; the diameter of the limiting plate is larger than the diameter of the second inner peripheral wall; the limiting plate is located inside the housing; the guide block slides against the second inner peripheral wall; when the material picking end extends to the farthest distance from the housing, the elastic drive member presses the limiting plate tightly against the step where the first inner peripheral wall and the second inner peripheral wall meet.

4. A split telescopic press-fitting unit according to claim 3, characterized in that, The minimum elastic force during the extension and retraction of the elastic drive component is greater than the maximum resistance during the process of the material picking block picking up the protective cover, so that the flow between the lubrication groove on the movable block and the grease storage cavity is cut off during the process of the material picking block picking up the protective cover.

5. A split telescopic press-fitting unit according to claim 3, characterized in that, The center of the end face of the limiting plate opposite to the guide block is convex.

6. A split telescopic press-fitting unit according to claim 1, characterized in that, The outer ring of the bearing is closed at one end and open at the other end; The split telescopic pressing unit also includes a limiting rod; the limiting rod is parallel to the axis of the movable block; the limiting rod is connected to the material-taking end of the movable block; the end of the limiting rod away from the movable block is an abutting end; the abutting end is located on the outside of the housing and has a gap with the material-taking end; the limiting rod has an oil guide hole; the oil guide hole passes through the limiting rod along its length.

7. A split telescopic press-fitting unit according to claim 6, characterized in that, The ratio of the distance between the abutment end and the material taking end to the axial depth of the outer ring of the bearing is between 70% and 95%.

8. A split telescopic press-fitting unit according to claim 1, characterized in that, The pressure shell also includes a grease injection and venting hole; the grease injection and venting hole is located on the circumferential wall of the pressure shell; the grease injection and venting hole connects the grease storage cavity with the outside of the shell.

9. A split telescopic press-fitting unit according to claim 8, characterized in that, The diameter of the grease injection and venting hole satisfies the following formula: 2d / (D+h)=k; k is 0.05~0.15; where d is the diameter of the grease injection and venting hole; D is the diameter of the grease storage cavity; and h is the axial height of the grease storage cavity.

10. A pressing device, characterized in that, The pressing device includes: Split telescopic press-fitting unit as described in any one of claims 1-9; A press-fitting drive unit is connected to a press shell; the press-fitting drive unit drives the press shell to move along the sliding direction of the material taking block; The first feeding unit is used to supply the dust cover; the first feeding unit is located below the split telescopic pressing unit; the first feeding unit is slidably arranged horizontally. The second feeding unit is used to supply the outer ring of the bearing.

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