Symmetrical double-station bearing seal ring press-fitting machine

Abstract

This invention relates to the field of bearing assembly technology and discloses a symmetrical dual-station bearing seal ring press-fitting machine, including a base and an upper housing, which are fixed together by a support column. Two sets of seal ring press-fitting devices are arranged between the base and the upper housing. Each seal ring press-fitting device includes a press-fitting component and a placement component. This invention automatically keeps the bearing, seal ring and installation position coaxial during the press-fitting process, avoiding the eccentricity and misalignment problems that are easy to occur in manual assembly, thus improving the press-fitting accuracy and product assembly qualification rate. It also avoids the problem of uneven pressure on the seal ring and skewed press-fitting caused by bearing misalignment during the press-fitting process. Furthermore, the synchronous operation of the two devices improves the overall efficiency of the press-fitting operation. With the help of the pushing mechanism, it can also realize fully automated press-fitting operation, reduce the intensity of manual labor, and improve the qualification rate of the press-fitted products.

Description

Technical Field

[0001] This invention relates to the field of bearing assembly technology, specifically to a symmetrical dual-station bearing seal press-fitting machine. Background Technology

[0002] Bearings and seals are critical components in mechanical transmission systems, and their press-fit quality directly affects the operating accuracy, lifespan, and reliability of the equipment. During the assembly of bearings and seals, it is typically necessary to precisely press the seals into the designated positions on the bearing, or press the bearing into the housing mounting position. To ensure proper assembly, the coaxiality between the bearing and seal, and between the bearing and the mounting position, must be ensured during press-fitting, and the press-fitting force must be controlled to ensure uniform distribution.

[0003] Currently, the press-fitting of bearings and seals is mostly carried out using semi-automatic equipment assisted by manual labor or fully manual operation. During the operation, the operator first places the bearing on the press-fitting station, then manually places the seal, and then starts the press-fitting head to complete the pressing.

[0004] Before pressing in the seal ring, bearings often rely solely on simple positioning blocks or manual visual alignment, lacking reliable pre-positioning and clamping structures. When the pressing head presses down, the bearing is prone to lateral sliding or displacement, resulting in eccentricity between the seal ring and the bearing, misalignment during pressing, and uneven local pressure on the seal ring, ultimately affecting the sealing effect and service life. Summary of the Invention

[0005] To address the aforementioned problems in the prior art, this invention provides a symmetrical dual-station bearing seal press-fitting machine, which has the advantage of automatically keeping the bearing, seal, and mounting position coaxial during the press-fitting process.

[0006] To achieve the above objectives, the present invention provides the following technical solution: including a base and an upper housing, which are fixed together by a support column, and two sets of sealing ring pressing devices are provided between the base and the upper housing, wherein the sealing ring pressing device includes a pressing component and a placement component; The placement assembly includes a placement seat, which is fixed to the base by a fixing rod, and a machining bearing is placed inside the placement seat; The pressing assembly includes a feeding unit and a positioning unit, wherein the feeding unit includes a hydraulic cylinder and a hydraulic rod, and the bottom of the hydraulic rod is equipped with a pressing head with a negative pressure adsorption sealing ring; The positioning unit includes a positioning sleeve that slides relative to the hydraulic rod. The positioning sleeve is disposed on the outer periphery of the hydraulic rod, and the bottom of the positioning sleeve is provided with at least two positioning feet. The positioning feet cooperate with the placement seat to achieve the positioning of the machined bearing.

[0007] Preferably, a fixed plate is fixed on the hydraulic rod, and at least two connecting shafts are fixed on the fixed plate. The connecting shafts extend into the positioning sleeve and are slidably connected thereto, while a compression spring is disposed between the shaft and the positioning sleeve.

[0008] Preferably, a synchronization plate is fixed on the fixed plate on both sides, and the two sets of sealing ring pressing devices are operated synchronously through the cooperation of the synchronization plate and the hydraulic cylinder.

[0009] Preferably, the positioning foot is slidably disposed within the positioning sleeve, and the outer side of the positioning foot is provided with an inclined surface facing downward.

[0010] Preferably, a placement groove is provided in the middle of the placement seat, and the outer edge of the placement groove is beveled, the bevel angle of which matches the bevel angle of the positioning foot.

[0011] Preferably, two sliding shafts are provided on both ends of the positioning foot for rotation, and the sliding of the positioning foot is guided by the two sliding shafts. A first return spring is provided between the positioning foot and the positioning sleeve.

[0012] Preferably, an extension plate is slidably provided on the inner end face of the positioning foot, the extension plate is installed inside the positioning foot by a fixing spring, and a movable roller is provided at the bottom of the extension plate.

[0013] Preferably, the outer periphery of the positioning sleeve is further provided with a radially penetrating sealing ring mounting hole, and a sliding limiting block is provided inside one side of the sealing ring mounting hole, the inner surface of the limiting block being arc-shaped.

[0014] Preferably, the bottom of the pressing head is provided with a sealing ring mounting plate, and the sealing ring is adsorbed by negative pressure through air suction on the sealing ring mounting plate; the bottom of the pressing head is provided with a conical part. The limiting block has an arc-shaped inclined surface and a smooth surface. The smooth surface abuts against the outer periphery of the sealing ring mounting plate and is used to position the sealing ring during installation. The arc-shaped inclined surface matches the conical surface.

[0015] Preferably, a slider is fixed at the bottom of the limiting block, the slider slides inside the positioning sleeve, and a second return spring is disposed between the slider and the positioning sleeve.

[0016] Compared with the prior art, the present invention provides a symmetrical dual-station bearing seal press-fitting machine, which has the following advantages: The bearing is pre-positioned by positioning feet, then the outer edge of the bearing is pressed by positioning sleeve, and finally the pressing head completes the pressing of the seal ring. During the pressing process, the bearing, seal ring and installation position are automatically kept coaxial, avoiding the eccentricity and misalignment problems that are easy to occur in manual assembly, improving the pressing accuracy and product assembly qualification rate. It also avoids the problem of uneven pressure on the seal ring and skewed pressing caused by bearing misalignment during the pressing process. The overall efficiency of the pressing operation is improved by the setting of dual-device synchronous operation. With the push mechanism, the pressing operation can be fully automated, reducing the labor intensity of manual labor and improving the qualification rate of the pressed product. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the half-section structure of the present invention; Figure 3 This is a schematic diagram of the press-fit assembly structure of the present invention; Figure 4 This is a schematic diagram of the feed unit structure of the present invention; Figure 5 This is a schematic diagram of the positioning unit structure of the present invention; Figure 6 This is a schematic diagram of the limiting block of the present invention; Figure 7 This is a schematic diagram of the positioning foot structure of the present invention.

[0018] In the diagram: 10. Base; 11. Upper housing; 20. Placement seat; 201. Placement slot; 21. Fixing rod; 30. Hydraulic cylinder; 31. Hydraulic rod; 311. Fixing plate; 312. Connecting shaft; 313. Compression spring; 32. Synchronizing plate; 33. Press head; 331. Conical part; 34. Sealing ring mounting plate; 40. Positioning sleeve; 401. Sealing ring mounting hole; 41. Positioning foot; 411. Sliding shaft; 412. First return spring; 413. Extension plate; 4131. Roller; 42. Limiting block; 421. Arc-shaped inclined surface; 422. Sliding block; 423. Second return spring. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figure 1-7As shown, the device includes a base 10 and an upper housing 11, which are fixed together by a support column. Two sets of sealing ring pressing devices are provided between the base 10 and the upper housing 11. The sealing ring pressing device includes a pressing component and a placement component. The placement component includes a placement seat 20, which is fixed to the base 10 by a fixing rod 21. The processing bearing is placed inside the placement seat 20. The pressing component is located above the placement component and is used to press the sealing rings onto the processing bearing. The two sets of sealing ring pressing devices can press two processing bearings simultaneously, which can effectively improve processing efficiency and ensure coaxiality during the pressing process, avoiding sealing ring misalignment that could lead to substandard sealing performance.

[0021] The press fitting assembly includes a feeding unit and a positioning unit. The feeding unit includes a hydraulic cylinder 30 and a hydraulic rod 31. The bottom of the hydraulic rod 31 is equipped with a press fitting head 33 that uses negative pressure to adsorb the sealing ring. The bottom of the press fitting head 33 is provided with a sealing ring mounting plate 34. The sealing ring is adsorbed by air suction on the sealing ring mounting plate 34. The bottom of the press fitting head 33 is provided with a conical surface 331. A fixed plate 311 is fixed on the hydraulic rod 31, and at least two connecting shafts 312 are fixed on the fixed plate 311. The connecting shafts 312 extend into the positioning sleeve 40 and are slidably connected to it. At the same time, a compression spring 313 is arranged between the connecting shaft and the positioning sleeve 40. Synchronizing plates 32 are fixed on the fixed plates 311 on both sides. The synchronous plates 32 and the hydraulic cylinder 30 work together to realize the synchronous operation of the two sets of sealing ring pressing devices. The entire feeding unit can be fed downward under the drive of the hydraulic cylinder 30. The compression spring 313 can provide buffer margin when the positioning sleeve 40 is blocked, ensuring the safety of the feeding process. At the same time, it works with the positioning sleeve 40 to complete the positioning operation. Through synchronous drive, the pressing operation of the two sealing rings of the bearing can be completed simultaneously, effectively improving the efficiency of pressing processing.

[0022] The positioning unit includes a positioning sleeve 40 that slides relative to the hydraulic rod 31. The positioning sleeve 40 is located on the outer periphery of the hydraulic rod 31. At least two positioning feet 41 are provided at the bottom of the positioning sleeve 40. The positioning feet 41 cooperate with the placement seat 20 to achieve the positioning of the machined bearing.

[0023] The positioning foot 41 is slidably disposed within the positioning sleeve 40. The outer side of the positioning foot 41 is set with an inclined surface facing downwards. A placement groove 201 is provided in the middle of the placement seat 20. The radius of the placement groove 201 is much larger than that of the machined bearing. The difference between the radius of the placement groove 201 and the outer diameter of the machined bearing is not greater than the maximum extension stroke of the extension plate 413. This ensures that the extension plate 413 is already attached to the outer cylindrical surface of the machined bearing before the inclined surface of the positioning foot 41 contacts the chamfer of the placement seat 20, which facilitates the insertion and removal of the bearing. The outer edge of the placement groove 201 is chamfered, and its chamfer angle matches the angle of the inclined surface of the positioning foot 41. The inclination angle between the inclined surface and the chamfer is 30°~60°, which ensures that the positioning foot 41 slides smoothly inwards under hydraulic action and avoids self-locking jamming caused by too small an angle. When the positioning sleeve 40 moves downward under the pressure of the compression spring 313, the inclined surface of the positioning foot 41 gradually slides inward along the chamfer of the placement groove 201. The simultaneous action of multiple positioning feet 41 can limit and calibrate the machined bearing placed in the placement seat 20 from the outside, ensuring the positional accuracy of the machined bearing and providing an accurate positional reference for the subsequent press-fitting of the sealing ring. Two sliding shafts 411 are provided on both sides of the positioning foot 41 for rotation. The sliding of the positioning foot 41 is guided by the two sliding shafts 411, reducing the frictional resistance during the sliding process of the positioning foot 41 and preventing the positioning foot 41 from getting stuck. A first return spring 412 is arranged between the positioning foot 41 and the positioning sleeve 40. The first return spring 412 provides elastic force to ensure the stability of the initial position of the positioning foot 41 in the unloaded state. After the press-fitting is completed, it can also push the positioning foot 41 to automatically return to its original position.

[0024] Two sliding shafts 411 are provided on both sides of the positioning foot 41 for rotation. The sliding of the positioning foot 41 is guided by the two sliding shafts 411. A first return spring 412 is arranged between the positioning foot 41 and the positioning sleeve 40. When the positioning foot 41 is pressed down and engaged with the inclined angle of the placement seat 20, the positioning foot 41 drives the extension plate 413 to move synchronously during the sliding process. After the extension plate 413 extends out, it fits against the outer surface of the processed bearing, thereby achieving further positioning and fixing of the processed bearing and preventing the processed bearing from shaking or shifting during the press-fitting process.

[0025] An extension plate 413 is slidably mounted on the inner end face of the positioning foot 41. The extension plate 413 is installed inside the positioning foot 41 by a fixing spring. A movable roller 4131 is provided at the bottom of the extension plate 413. With the extension plate 413, when the positioning foot 41 moves downward, it can first enter the placement seat 20. At this time, the positioning foot 41 has not yet contacted the placement seat 20, that is, the positioning foot 41 will not slide. This avoids the positioning foot 41 from starting to move towards the center before it touches the outer side of the processing bearing, thus failing to drive the processing bearing to move towards the center. The roller 4131 can greatly reduce the friction between the extension plate 413 and the bottom of the placement groove 201, reduce the wear of the extension plate 413, and extend the service life of the device. At the same time, the elastic force of the fixing spring will push the extension plate 413 to always extend outward, ensuring that the extension plate 413 can be properly driven to reset during reset.

[0026] The outer periphery of the positioning sleeve 40 is also provided with a radially penetrating sealing ring mounting hole 401. A sliding limiting block 42 is provided inside one side of the sealing ring mounting hole 401. The inner surface of the limiting block 42 is arc-shaped, and the arc surface of the limiting block 42 is divided into an arc-shaped inclined surface 421 and a smooth surface. The smooth surface abuts against the outer periphery of the sealing ring mounting plate 34 and is used to position the sealing ring during installation. The arc-shaped inclined surface 421 matches the conical surface 331. A slider 422 is fixed at the bottom of the limiting block 42. The slider 422 slides inside the positioning sleeve 40. A second return spring 423 is arranged between the slider 422 and the positioning sleeve 40. The elastic force of the second return spring 423 can drive the limiting block 42 to maintain a tendency to move towards the center position, so that the limiting block 42 can always fit the outer edge of the sealing ring during the sealing ring pressing process, avoiding the sealing ring from being misaligned during the pressing feed process and ensuring the accurate installation position of the sealing ring. After the sealing ring is fed into the bearing, the press head 33 stops sucking air and releases the seal ring. The feed unit drives the press head 33 to move in the opposite direction to reset. At this time, the conical part 331 will move to the position aligned with the arc-shaped inclined surface 421. Under the squeezing action of the conical part 331, the limiting block 42 will be squeezed outward, so that the press head 33 can pass smoothly and avoid the limiting block 42 getting stuck above the seal ring and obstructing the reset of the press head 33, thus ensuring that the press operation is completed smoothly.

[0027] Working principle: During use, the sealing ring is manually inserted into the sealing ring mounting plate 34 through the notch on one side of the sealing ring mounting hole 401. The airflow of the sealing ring mounting plate 34 adsorbs the sealing ring for fixation. The operator can push the sealing ring until it abuts against the limiting block 42. The arc surface of the limiting block 42 restricts the operator's movement during the insertion of the annular sealing ring, causing its center line to coincide with the center line of the limiting block 42. The center line of the limiting block 42 coincides with the hydraulic rod 31, so the sealing ring and the hydraulic rod 31 are coaxial (when pushing the annular sealing ring in forcefully, until the circular surface of the sealing ring coincides with the arc surface of the limiting block 42, at which point the two are concentric). Then, the bearing is placed freely in the placement seat 20 without manual positioning, and then the hydraulic cylinder 30 is started to feed and press.

[0028] When the hydraulic cylinder 30 is activated, it drives the hydraulic rod 31 to move downward. At the same time, the positioning sleeve 40 moves downward until the positioning foot 41 enters the placement groove 201. The extension plate 413 on the positioning foot 41 moves downward along the inner wall of the placement groove 201. When the positioning foot 41 moves downward and contacts the chamfer of the placement seat 20, under the continuous pressure of the hydraulic rod 31, the entire positioning foot 41 can be moved towards the center line of the positioning sleeve 40 by the mutual squeezing of the inclined surfaces. At this time, the bearing can be pushed into the center line of the placement groove 201 by the simultaneous movement of multiple positioning feet 41 towards the center. Since the center positioning of the placement groove 201, the positioning sleeve 40 and the hydraulic rod 31 has been completed in the design and assembly process, the machined bearing and the hydraulic rod 31 are coaxial at this time. Similarly, the sealing ring coaxial with the hydraulic rod 31 is also coaxial with the machined bearing during installation, so the two can be pressed in more accurately.

[0029] After the positioning foot 41 abuts against the machined bearing and completes positioning, the positioning sleeve 40 moves precisely to the bottom to press the outer edge of the machined bearing; then the hydraulic rod 31 continues to descend, the pressing head 33 slides downward relative to the positioning sleeve 40, and the sealing ring mounting plate 34 presses the sealing ring into the machined bearing. After pressing is completed, the hydraulic rod 31 retracts, driving the positioning sleeve 40 to retract synchronously; at this time, without the restriction of the placement groove 201, the positioning foot 41 resets under the elastic force of the first return spring 412, and the extension plate 413 retracts synchronously; at the same time, the conical part 331 of the pressing head 33 contacts the arc-shaped inclined surface 421 of the limiting block 42, pushing the limiting block 42 to compress the second return spring 423 and slide outward, so that the limiting block 42 avoids the pressing head 33, ensuring that the pressing head 33 resets smoothly, ready for the next pressing. Then the pressed bearing can be manually removed, and the sealing ring is placed on the sealing ring mounting plate 34 again. This placement process can be automated by a pushing mechanism instead of manual labor.

[0030] At the same time, the two sets of sealing ring pressing devices operate simultaneously, greatly increasing their working efficiency.

[0031] In summary, this symmetrical dual-station bearing seal ring press-fitting machine pre-positions the bearing using positioning feet, then presses the outer edge of the bearing with a positioning sleeve, and finally presses the seal ring into place using the pressing head. During the pressing process, the machine automatically keeps the bearing, seal ring, and mounting position coaxial, avoiding the eccentricity and misalignment problems that easily occur in manual assembly, thus improving pressing accuracy and product assembly qualification rate. It also avoids uneven pressure on the seal ring and misalignment caused by bearing misalignment during pressing. Furthermore, the synchronous operation of the two devices improves the overall efficiency of the pressing operation. Combined with a pushing mechanism, it can achieve fully automated pressing operations, reducing manual labor intensity and increasing the qualification rate of pressed products.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A symmetrical dual-station bearing seal ring press-fitting machine, comprising a base (10) and an upper housing (11), the two being fixed together by a support column, wherein two sets of seal ring press-fitting devices are provided between the base (10) and the upper housing (11), characterized in that: The sealing ring pressing device includes a pressing component and a placement component; The placement assembly includes a placement seat (20), which is fixed to the base (10) by a fixing rod (21), and a machining bearing is placed inside the placement seat (20); The pressing assembly includes a feeding unit and a positioning unit, wherein the feeding unit includes a hydraulic cylinder (30) and a hydraulic rod (31), and the bottom of the hydraulic rod (31) is equipped with a pressing head (33) with a negative pressure adsorption sealing ring. The positioning unit includes a positioning sleeve (40) that slides relative to the hydraulic rod (31). The positioning sleeve (40) is located on the outer periphery of the hydraulic rod (31). The bottom of the positioning sleeve (40) is provided with at least two positioning feet (41). The positioning feet (41) cooperate with the placement seat (20) to achieve the positioning of the machined bearing.

2. The symmetrical dual-station bearing seal press-fitting machine according to claim 1, characterized in that: A fixed plate (311) is fixed on the hydraulic rod (31), and at least two connecting shafts (312) are fixed on the fixed plate (311). The connecting shafts (312) extend into the positioning sleeve (40) and slide therewith, while a compression spring (313) is arranged between the shaft and the positioning sleeve (40).

3. The symmetrical dual-station bearing seal press-fitting machine according to claim 2, characterized in that: Synchronous plates (32) are fixed on the fixed plates (311) on both sides. The synchronous plates (32) and hydraulic cylinders (30) work together to realize the synchronous operation of the two sets of sealing ring pressing devices.

4. The symmetrical dual-station bearing seal press-fitting machine according to claim 1, characterized in that: The positioning foot (41) is slidably disposed within the positioning sleeve (40), and the outer side of the positioning foot (41) is set with an inclined surface facing downward.

5. A symmetrical dual-station bearing seal press-fitting machine according to claim 4, characterized in that: The placement seat (20) has a placement groove (201) in the middle. The outer edge of the placement groove (201) is chamfered, and the chamfer angle matches the chamfer angle of the positioning foot (41).

6. The symmetrical dual-station bearing seal press-fitting machine according to claim 1, characterized in that: The two end faces of the positioning foot (41) are provided with two sliding shafts (411) for rotation. The sliding of the positioning foot (41) is guided by the two sliding shafts (411). A first return spring (412) is arranged between the positioning foot (41) and the positioning sleeve (40).

7. A symmetrical dual-station bearing seal press-fitting machine according to claim 1, characterized in that: An extension plate (413) is slidably provided on the inner end face of the positioning foot (41). The extension plate (413) is installed in the positioning foot (41) by a fixing spring. A movable roller (4131) is provided at the bottom of the extension plate (413).

8. A symmetrical dual-station bearing seal press-fitting machine according to claim 1, characterized in that: The outer periphery of the positioning sleeve (40) is also provided with a radially penetrating sealing ring mounting hole (401). A sliding limiting block (42) is provided inside one side of the sealing ring mounting hole (401), and the inner surface of the limiting block (42) is set as an arc surface.

9. A symmetrical dual-station bearing seal press-fitting machine according to claim 8, characterized in that: The bottom of the pressing head (33) is provided with a sealing ring mounting plate (34), and the sealing ring is adsorbed by negative pressure through air suction on the sealing ring mounting plate (34). The bottom of the pressing head (33) is provided with a conical surface (331). The arc surface of the limiting block (42) is divided into an arc-shaped inclined surface (421) and a smooth surface, wherein the smooth surface abuts against the outer periphery of the sealing ring mounting plate (34) for positioning the sealing ring during installation, wherein the arc-shaped inclined surface (421) matches the conical surface (331).

10. A symmetrical dual-station bearing seal press-fitting machine according to claim 8, characterized in that: The bottom of the limiting block (42) is fixed with a slider (422), which slides inside the positioning sleeve (40). A second return spring (423) is arranged between the slider (422) and the positioning sleeve (40).

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