Bearing assembling device

Abstract

The invention relates to the technical field of bearing assembling, and discloses a bearing assembling device which comprises a bearing platform, a plurality of ball falling pipes and a plurality of ball receiving groove bodies which are evenly distributed in a circular arc shape. The lower side of the bearing platform is connected with a fixing shaft, the outer side of the fixing shaft is provided with a plurality of swing rods corresponding to the ball receiving groove bodies, the tail ends of the swing rods are supported on the lower sides of the ball receiving groove bodies, the middles of the swing rods are connected end to end through a plurality of hinged connecting rods, the swing rod at the head end is fixedly connected with the fixing shaft, and the other swing rods are hinged to the fixing shaft. One end of each connecting rod is hinged to the corresponding swing rod, the other end of each connecting rod is hinged to the corresponding sliding block of the adjacent swing rod, and a circular-arc-shaped through hole allowing the ball receiving groove body to move is formed in the bearing platform; the swing rod and the connecting rod are folded into a fan shape and unfolded into a circle, ball separation is achieved through the ball receiving groove body without being affected by the diameters and gaps of the balls, the balls are directly separated at the ball placing station, irregular dispersion of the balls is avoided, the ball separation process is stable and free of impact, the balls cannot be damaged, and the structure is compact.

Description

Technical Field

[0001] This invention relates to the field of bearing assembly technology, and more specifically to a bearing assembly device. Background Technology

[0002] Ball bearings are the most commonly used type of rolling bearings. They mainly consist of an inner ring, an outer ring, balls, and a cage. They rely on the rolling of the balls between the inner and outer ring raceways to reduce friction, support the rotating shaft, and bear radial and axial loads. Common types include deep groove ball bearings, angular contact ball bearings, self-aligning ball bearings, and thrust ball bearings. They are characterized by simple structure, high speed, low cost, and strong versatility, and are widely used in various mechanical equipment such as motors, automobiles, machine tools, and home appliances.

[0003] Ball bearing assembly is the core process of precisely combining components such as the inner ring, outer ring, balls, and cage into a complete bearing according to process requirements. Its function is to achieve accurate positioning of each part, control radial and axial clearance, ensure uniform distribution of rolling elements and constrain their movement, thereby ensuring the bearing's rotational accuracy, operational stability, and load-bearing capacity. It directly determines the bearing's precision, performance, noise level, and service life, and is a key link in the bearing's transformation from parts to finished product, which is of great significance to the reliability of the subsequent operation of the entire machine.

[0004] In ball bearing assembly, ball separation involves eccentrically positioning the inner and outer rings to widen the raceway clearance, then evenly inserting a specified number of balls into the raceway, separating the balls at equal intervals, and finally pressing in and securing the cage. This allows the balls to be evenly distributed and roll freely within the raceway, completing the core assembly step. Traditionally, bearings are assembled by manually placing the bearing balls into the raceway between the outer and inner rings, then manually separating them using tools such as ball rollers. The separated balls are then evenly distributed within the raceway, meeting the requirements for cage insertion. In automated assembly lines, balls are inserted between inner and outer rings, and then the bearing is moved to a ball-separating station where a ball-separating structure is used for separation. The ball-separating structure often includes a circular base and multiple ball-separating needles evenly distributed along the circumference of the base. The ball-separating needles have equal widths but different lengths, and their bottoms are pointed. The base is raised and lowered, causing the ball-separating needles to rise and fall and insert between the balls, causing the balls to spread out and achieving ball separation. For example, patent CN213064384U discloses an integrated ball-separating and ball-inspection device for bearing assembly. The lifting and inserting ball-separating structure has the following drawbacks: First, it is only suitable for bearings with small gaps between the balls. When the circumferential gap between adjacent balls is greater than the outer diameter of the ball, the circumferential span of the ball-separating needle is too large, and the ball-separating needle covers the entire ball. If a ball on the front side of the ball's movement direction partially enters between the ball-separating needles, it will cause a jamming impact. Second, it is necessary to ensure that all balls are concentrated in the pre-separation position and correspond to specific positions of the ball-separating structure. However, during the transfer from the ball-laying station to the ball-separating station and during the eccentric reset of the inner ring, the balls will be randomly dispersed. Third, the tilt angle and lifting speed of the ball-separating needle are subject to strict requirements. If the tilt angle of the lower side of the ball-separating needle is too small, the ball-separating driving force is insufficient. If the tilt angle of the lower side of the ball-separating needle is too large, it is easy to cause the balls to generate interaction forces and quickly disperse randomly, leading to ball-separation failure and jamming. Fourth, it is easy to directly scratch the ball surface, and the resulting unstable axial impact acts on the raceways of the inner and outer rings of the bearing, affecting the ball fit accuracy during bearing use. Summary of the Invention

[0005] The purpose of this invention is to provide a bearing assembly device in order to solve at least one of the problems in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A bearing assembly device includes a bearing platform supporting the inner and outer rings of the bearing, a plurality of ball drop tubes for placing balls between the inner and outer rings, and a plurality of ball receiving grooves corresponding to the ball drop tubes, the ball receiving grooves being evenly distributed along an arc shape; a fixed shaft is connected to the lower side of the bearing platform, and a plurality of rocker arms corresponding to the ball receiving grooves are provided on the outer side of the fixed shaft, the ends of the rocker arms being supported on the lower side of the ball receiving grooves, the middle parts of the rocker arms being connected end to end by a plurality of hinged connecting rods, the first rocker arm being fixedly connected to the fixed shaft, the remaining rocker arms being hinged to the fixed shaft, the last rocker arm being actively rotated, and a slider being radially slidably connected to the middle of the rocker arm, one end of the connecting rod being hinged to the rocker arm, and the other end being hinged to the slider of the adjacent rocker arm, the bearing platform having an arc-shaped through hole for the ball receiving grooves to move.

[0007] Furthermore, the connecting rod has two layers, with the two layers of connecting rods located on the upper and lower sides of the swing arm respectively; the single-layer connecting rods are connected end to end in an arc-shaped sawtooth shape, and the two layers of connecting rods are staggered and correspond to each other.

[0008] Furthermore, the swing arm has a strip-shaped hole in the middle, and the slider passes through the strip-shaped hole and slides along the strip-shaped hole.

[0009] Furthermore, an elastic telescopic rod is connected to the lower side of the ball receiving groove. The elastic telescopic rod is supported between the upper side of the end of the swing rod and the ball receiving groove. The upper part of the elastic telescopic rod and the ball receiving groove are located in the arc-shaped through hole.

[0010] Furthermore, an electromagnetic base is embedded in the bottom of the ball receiving groove, and the electromagnetic base generates a magnetic attraction force on the ball when energized.

[0011] Furthermore, an end sleeve is fitted on the outer side of the end of the swing arm, and an elastic rope is connected between the end sleeve and the end of the swing arm.

[0012] Furthermore, the fixed shaft passes through the lower end of the rocker arm and is connected to a fixed seat. The fixed seat is equipped with a driving gear and a motor that drives the driving gear to rotate. The tail end of the rocker arm is connected to a driven gear that meshes with the driving gear.

[0013] Furthermore, a support is provided on the upper side of the support platform, and a hoop is provided on one side of the support to surround the ball drop tube.

[0014] Furthermore, the two sides of the bearing platform are provided with upwardly bent folded edges, and one side of the bearing platform is provided with a movable clamping block for holding the outer ring of the bearing; one side of the bearing platform has a notch, and a slide is provided on the outer side of the corresponding notch. The movable clamping block slides linearly on the inner side of the slide. The slide is provided with a third cylinder for driving the movable clamping block to slide. The movable clamping block and the other side of the bearing platform clamp the outer ring of the bearing on both sides to fix the outer ring of the bearing. The movable clamping block has an arc-shaped groove that fits with the outer ring of the bearing.

[0015] Furthermore, an inner support plate extending into the inner ring of the bearing and a first cylinder driving the inner support plate to rise and fall are provided above the bearing platform. A translation seat supporting the first cylinder and a second cylinder driving the translation seat to move are provided on the upper side of the bearing platform. A support is provided on the upper side of the edge of the bearing platform, and a slide rail is provided on the support. The translation seat slides along the slide rail, and the second cylinder is located on the support to drive the translation seat to move. The first cylinder is installed on the translation seat and moves with the translation seat.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention features a swing arm and connecting rod that retract and fold into a fan shape, receiving balls through arc-shaped ball receiving grooves. When the swing arm and connecting rod unfold into a circle, the ball receiving grooves drive the arc-shaped balls to be evenly distributed circumferentially, achieving ball separation. This is unaffected by the diameter and gap of the balls, and ball separation can be performed directly at the ball placement station, reducing one station and eliminating the bearing transfer process. This avoids irregular dispersion of the balls, ensures accurate initial position of the balls, and provides a smooth and impact-free ball separation process without damaging the balls. The structure is also compact. This invention differs from traditional folding fan structures. It uses two layers of connecting rods to enable the unfolding and folding of multi-layered swing rods stacked at different heights. A slider that passes through and slides along the strip hole supports the folding and unfolding of the double-layer connecting rods, enabling the swing rods to rotate between a fan-shaped state and a circular state. This is cleverly combined with the ball placement and distribution in bearing assembly to achieve uniform circumferential distribution of the ball bearings. The invention features a first-end swing arm that is fixedly connected to a fixed shaft, and a second-end swing arm that is connected to a motor and a gear transmission structure, thereby enabling the automatic expansion and contraction of the swing arm and connecting rod. This invention employs an electromagnetic seat that generates magnetic attraction to the balls when energized, enabling engagement and separation with the balls and driving them to disperse stably. An elastic telescopic rod supports the ball receiving groove and the electromagnetic seat. When the elastic telescopic rod contracts without external force, it ensures the ball receiving groove does not exceed the upper side of the bearing platform, thus not affecting the external force pushing and translating the bearing. When the electromagnetic seat is in contact with the balls, the elastic telescopic rod extends to compensate for the vertical position, aligning the balls with the bearing raceway. The rocker arm of this invention has an elastically telescopic end sleeve at its outer end. When the inner ring is eccentric, the end sleeve contracts to make the receiving groove body correspond to the ball. When the inner ring is reset and located at the center of the outer ring, the ball enters the raceway between the inner and outer rings, and the end sleeve elastically extends to compensate for radial displacement. This invention achieves rapid, sequential ball placement through multiple ball drop tubes, improving ball placement efficiency and accuracy. Combined with an electromagnetic base, it prevents ball misalignment. Combined with a swing arm, it directly enables ball distribution at the ball placement station. The inner support plate can be raised, lowered, and moved horizontally to achieve eccentricity and alignment of the bearing inner ring. Raising the inner support plate does not affect the bearing's horizontal movement along the bearing platform. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention from the upper side view.

[0018] Figure 2 This is a three-dimensional structural diagram of the present invention from a lower perspective.

[0019] Figure 3 This is a three-dimensional schematic diagram of the dismantled ball drop tube state according to the present invention.

[0020] Figure 4 This is a top view of the disassembled ball drop tube of the present invention.

[0021] Figure 5 This is a three-dimensional schematic diagram of the present invention from the side view in the state without the rocker arm.

[0022] Figure 6 This is a schematic diagram of the ball drop tube and its supporting structure according to the present invention.

[0023] Figure 7 This is a three-dimensional schematic diagram of the fan-shaped state of the pendulum rod according to the present invention.

[0024] Figure 8 This is a top view schematic diagram of the fan-shaped state of the pendulum rod according to the present invention.

[0025] Figure 9 This is a top view of the circular state of the pendulum rod of the present invention.

[0026] Figure 10 This is a schematic diagram of the end sleeve in the exploded state of the swing rod at both ends of the present invention.

[0027] In the diagram: 1. Support platform; 2. Ball drop tube; 3. Ball receiving groove; 4. Fixed shaft; 5. Swing rod; 6. Connecting rod; 7. Slider; 8. Strip hole; 9. Elastic telescopic rod; 10. Arc-shaped through hole; 11. Electromagnetic seat; 12. End sleeve; 13. Limiting post; 14. Elastic rope; 15. Fixed seat; 16. Driving gear; 17. Motor; 18. Driven gear; 19. Hoop; 20. Bracket; 21. Folded edge; 22. Movable clamp; 23. Slide; 24. Third cylinder; 25. Inner support plate; 26. First cylinder; 27. Translation seat; 28. Support; 29. ​​Second cylinder; 30. Slide rail. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention; that is, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] Specific embodiments of the bearing assembly device provided by the present invention: Please refer to the attached document. Figures 1-10The bearing assembly device can achieve the technical effect of direct ball separation at the ball release station, solving the problems of traditional ball separation structure being limited by the ball gap, prone to jamming and impact, irregular ball dispersion and surface damage.

[0030] The basic support of this device is a bearing platform 1, which is a flat plate structure adapted to bearing assembly. Its two sides are bent upward to form folded edges 21, which not only improves the structural strength of the bearing platform 1, but also provides a limit for the outer ring of the bearing to prevent it from falling off. The bearing platform 1 has an arc-shaped through hole 10, which serves as a moving channel for the ball receiving groove 3, ensuring that the ball receiving groove 3 moves along the arc trajectory, which facilitates the ball separation and the reset of the ball receiving groove 3. It can be understood that the upper side of the ball receiving groove 3 has a groove that fits with the bottom of the ball, which can stably support the ball and fit with the bottom of the ball.

[0031] A fixed shaft 4 is fixedly connected to the center of the lower side of the bearing platform 1. The fixed shaft 4 extends vertically downward, and its lower end passes through all the rocker arms 5 and is fixedly connected to the fixed seat 15. The fixed seat 15 provides the installation foundation for the entire drive transmission structure. A bracket 20 is erected on the upper side of the bearing platform 1. The bracket 20 is installed on the upper side of the folded edge 21 on one side of the bearing platform 1. Three hoops 19 of different heights are provided inside the bracket 20. The hoops 19 are arc-shaped frame structures used to surround and fix the ball drop tube 2. The ball drop tube 2 is located inside the hoops 19 to ensure the verticality of the lower part of the ball drop tube 2. The lower end of the ball drop tube 2 is higher than the bearing and has a vertical gap with the bearing. The number of ball drop tubes 2 corresponds one-to-one with the ball receiving groove 3, and the discharge port of the ball drop tube 2 is directly facing the ball receiving groove 3 below to achieve accurate ball delivery.

[0032] In order to load the balls, it is necessary to achieve precise positioning and eccentric / alignment switching of the inner and outer rings of the bearing. This embodiment is equipped with a movable clamping block 22, an inner support plate 25 and a corresponding drive cylinder to ensure the stability of the bearing position during the ball loading and ball distribution process.

[0033] Specifically, a notch is formed on the folded edge 21 on one side of the bearing platform 1, and a slide 23 is fixedly installed on the outside of the notch. A movable clamping block 22 is slidably connected to the slide 23, and a third cylinder 24 is also installed on the slide 23. The piston rod of the third cylinder 24 is connected to the movable clamping block 22, driving the movable clamping block 22 to slide linearly along the slide 23. The movable clamping block 22 has an arc-shaped groove on the side facing the outer ring of the bearing that fits against the outer wall of the outer ring of the bearing. When the third cylinder 24 extends, the movable clamping block 22 cooperates with the folded edge 21 on the other side of the bearing platform 1 to achieve rigid clamping from both sides of the outer ring of the bearing, fixing the outer ring of the bearing in the preset position of the bearing platform 1 and preventing the outer ring from shifting during assembly.

[0034] A support 28 is fixed to the upper edge of the bearing platform 1. The support 28 is an inverted L-shaped plate structure. Two parallel slide rails 30 are installed on the support 28. The translation seat 27 slides with the slide rails 30. The sliding direction of the translation seat 27 is parallel to the vertical line connecting the two folded edges 21 of the bearing platform 1. A second cylinder 29 is also installed on the support 28. The piston rod of the second cylinder 29 is connected to the translation seat 27, driving the translation seat 27 to move horizontally along the slide rails 30. A first cylinder 26 is vertically installed on the translation seat 27. The piston rod of the first cylinder 26 points downward and connects to the inner support plate 25. The inner support plate 25 is a vertical plate structure that fits the inner wall of the bearing inner ring. When the inner support plate 25 extends into the bearing inner ring, its two ends fit against the opposite sides of the bearing inner ring. The lower edge of the inner support plate 25 has chamfers at both ends to facilitate entry into the bearing inner ring. The moving direction of the inner support plate 25 is parallel to that of the translation seat 27.

[0035] Eccentric action: Before ball distribution, the second cylinder 29 drives the translation seat 27 to move horizontally, causing the inner support plate 25 to correspond to the inner side of the bearing inner ring. Then, the first cylinder 26 extends to lower the inner support plate 25 and extend into the inner side of the bearing inner ring. The second cylinder 29 drives the translation seat 27 to move horizontally, causing the inner ring to be eccentric relative to the outer ring. The inner and outer rings fit together, expanding the raceway clearance between the inner and outer rings and providing sufficient space for ball distribution. Alignment action: After the balls are inserted, the second cylinder 29 drives the translation seat 27, the first cylinder 26 and the inner support plate 25 to move horizontally. The inner support plate 25 drives the inner ring of the bearing to move to the center of the outer ring of the bearing, and the balls enter the raceway between the inner and outer rings of the bearing, thus completing the alignment of the inner ring.

[0036] The ball dropping and distributing part of this device includes a ball dropping tube 2, a ball receiving groove 3, a swing rod 5, a connecting rod 6, and a slider 7, which realizes the precise reception of the ball and the uniform distribution of the ball around the circumference. The swing rod 5 and the connecting rod 6 can be folded into a fan shape and unfolded into a circle to adapt to the two processes of ball dropping and ball distribution.

[0037] The ball receiving groove 3 is a cylindrical structure with a relatively low height. The number of the ball dropping tube 2 and the swing rod 5 are the same, and they are evenly distributed along the arc. The groove on its upper side is directly opposite the ball dropping tube 2, and the lower side is connected to the upper end of the elastic telescopic rod 9. The lower end of the elastic telescopic rod 9 is supported on the upper side of the end of the swing rod 5. The upper parts of the ball receiving groove 3 and the elastic telescopic rod 9 are both located in the arc-shaped through hole 10 of the support platform 1, and can move along the arc-shaped through hole 10 with the swing rod 5.

[0038] An electromagnetic base 11 is embedded in the bottom of the ball receiving groove 3. The electromagnetic base 11 is connected to an external power source. When energized, it generates a magnetic attraction force, which allows it to adhere to the bottom of the ball receiving groove 3, ensuring stable ball support and preventing the ball from rolling off after being placed in the groove. When the power is off, the magnetic attraction force disappears, and the ball can easily detach from the ball receiving groove 3. It is understood that the electromagnetic base 11 has an insulating shell, and there is an insulating spacer layer between the electromagnetic base 11 and the ball receiving groove 3.

[0039] The elastic telescopic rod 9 is a telescopic structure with its own restoring elastic force. When there is no external force, it is in a retracted state. At this time, the upper surface of the ball receiving groove 3 is not higher than the upper side of the bearing 1, and does not affect the horizontal translation of the bearing on the bearing 1. When the electromagnetic seat 11 is attracted and the ball enters the bearing raceway, the elastic telescopic rod 9 can extend under the action of the relative attraction force of the ball, vertically compensating for the position of the ball receiving groove 3, so that the ball accurately corresponds to the height of the bearing raceway.

[0040] Several swing rods 5 are sleeved on the outside of the fixed shaft 4. The swing rods 5 are plate-shaped structures to minimize the vertical dimension. The number of swing rods 5 corresponds one-to-one with the ball receiving groove 3, and the ends of the swing rods 5 are supported by the elastic telescopic rods 9 on the lower side of the corresponding ball receiving groove 3. The connection between the swing rods 5 and the fixed shaft 4 is as follows: the first swing rod 5 is fixedly connected to the fixed shaft 4, and the central ends of the remaining swing rods 5 rotate around the fixed shaft 4, and can only swing in a circle around the fixed shaft 4; the tail swing rod 5 rotates actively and is connected to the drive transmission structure to receive the rotational driving force.

[0041] A strip-shaped hole 8 is provided in the middle of the swing rod 5. The slider 7 passes through the strip-shaped hole 8 and slides linearly with the strip-shaped hole 8, and can slide radially along the strip-shaped hole 8. The middle parts of the swing rods 5 are connected end to end by several connecting rods 6. The connecting rods 6 are connected in the following way: one end is hinged to one of the swing rods 5, and the other end is hinged to the slider 7 of the adjacent swing rod 5. The radial sliding of the slider 7 adapts to the change in the distance when the swing rods 5 swing.

[0042] In this device, the connecting rod 6 has two layers, which are located on the upper and lower sides of the swing rod 5 respectively. The single-layer connecting rod 6 is connected end to end in an arc-shaped sawtooth shape, and the two layers of connecting rod 6 are staggered and correspond to each other. This double-layer connecting rod 6 structure is different from the traditional folding fan structure. It can realize the synchronous unfolding and folding of multiple layers of swing rods 5 stacked at different heights, ensuring that the swing angle of all swing rods 5 is consistent, thereby synchronizing the movement trajectory of the ball receiving groove 3 and realizing the uniform circumferential distribution of the balls.

[0043] An end sleeve 12 is fitted onto the outer side of the end of the swing arm 5. The end sleeve 12 has a rectangular cross-section and a rectangular blind hole for relative sliding of the end of the swing arm 5. An elastic rope 14 is connected between the bottom of the rectangular hole of the end sleeve 12 and the end of the swing arm 5, and a limiting post 13 is provided at the end of the swing arm 5 to limit the retraction stroke of the end sleeve 12. In this embodiment, the elastic telescopic rod 9 is vertically connected to the upper side of the end sleeve 12. It can be understood that the elastic telescopic rod 9 can adopt a similar mating structure to the end sleeve 12 and the swing arm 5. The elastic telescopic rod 9 includes an outer rod and an inner rod that slides along the inner side of the outer rod. A tension spring is connected between the inner rod and the inner side of the outer rod.

[0044] The end sleeve 12 is an elastic telescopic structure, and its function is to compensate for radial displacement. When the inner ring is eccentric, the end sleeve 12 contracts under the tension of the elastic rope 14, so that the ball receiving groove 3 accurately corresponds to the ball placement position, that is, the area between the inner and outer rings of the bearing that is not affected by the bearing raceway; when the inner ring returns to the center of the outer ring, the ball needs to enter the raceway between the inner and outer rings. The end of the rocker arm 5 generates radial displacement with the unfolding action. The end sleeve 12 extends against the elastic force to compensate for the radial displacement, ensuring that the ball receiving groove 3 is always in contact with the ball, and driving the ball to move smoothly.

[0045] The drive transmission structure of this device provides power for the unfolding / folding of the swing arm 5, including a fixed base 15, a motor 17, a driving gear 16, and a driven gear 18, realizing the automatic and uniform rotation of the swing arm 5 and ensuring a smooth and impact-free ball distribution process. The lower end of the fixed shaft 4 is connected to the fixed base 15, and the motor 17 is installed on the fixed base 15. The output shaft of the motor 17 is connected to the driving gear 16. The driven gear 18 is connected to the lower side of the center end of the tail swing arm 5. The driven gear 18 has a through hole in the center for the fixed shaft 4 to pass through. The driven gear 18 and the driving gear 16 mesh with each other to form a gear transmission pair.

[0046] After the motor 17 starts, it drives the drive gear 16 to rotate, which in turn drives the driven gear 18 to rotate, thereby driving the tail-end swing arm 5 to swing around the fixed shaft 4 in a circular motion. Since the swing arms 5 are hinged together by the double-layer connecting rod 6, the swing driving force of the tail-end swing arm 5 is transmitted to all the swing arms 5 in sequence, so that all the swing arms 5 swing around the fixed shaft 4 synchronously, and the angle between adjacent swing arms 5 changes synchronously.

[0047] Folding action: Motor 17 rotates forward, driving the tail-end swing rod 5 to move closer to the head-end swing rod 5. All swing rods 5 swing synchronously and fold into a fan shape through the cooperation of slider 7 and connecting rod 6. At this time, all ball receiving grooves 3 retract along the arc and are in the preset position of the ball release station, facing the discharge port of the ball drop tube 2. Unfolding action: Motor 17 reverses, driving the tail-end swing rod 5 away from the head-end swing rod 5. All swing rods 5 swing synchronously and unfold into a circle through the cooperation of slider 7 and connecting rod 6. At this time, all ball receiving grooves 3 follow the swing rod 5 to make a circumferential unfolding motion along the arc-shaped through hole 10, driving the balls adsorbed in the groove to move in a circumferential motion synchronously, so that the balls are evenly distributed along the raceway circumference of the inner and outer rings of the bearing, completing the ball distribution.

[0048] Based on the structure and operation of the above components, the complete bearing ball assembly process of the bearing assembly device of the present invention is as follows, taking the assembly of a deep groove ball bearing as an example: Bearing positioning: Place the outer ring of the bearing between the folded edge 21 and the movable clamping block 22 on one side of the bearing platform 1. Start the third cylinder 24 to drive the movable clamping block 22 to slide and cooperate with the folded edge 21 to clamp the outer ring of the bearing. Start the second cylinder 29 to drive the translation seat 27 to move horizontally. Then start the first cylinder 26 to extend and lower the inner support plate 25 to enter the inner ring of the bearing, supporting the inner ring to achieve eccentric positioning and widen the raceway clearance between the inner and outer rings.

[0049] Folding of the swing arm 5: Start the motor 17 to rotate forward, and drive the tail swing arm 5 to swing through the gear transmission, so that all the swing arms 5 are folded into a fan shape. The ball receiving groove 3 is gathered along the arc to the ball placement position directly below the ball drop tube 2. At this time, the elastic telescopic rod 9 is in the retracted state, and the upper surface of the ball receiving groove 3 is not higher than the upper side of the support 1.

[0050] Ball ball placement and reception: The ball ball is placed from the top of the ball drop tube 2 and falls vertically along the ball drop tube 2. One ball ball falls from each ball drop tube 2 and the ball ball falls accurately into the ball receiving groove 3 below. At the same time, the electromagnetic base 11 is energized to generate magnetic attraction to attract the ball ball to the bottom of the ball receiving groove 3, so as to achieve stable reception of the ball ball and prevent the ball ball from rolling off or scattering.

[0051] Inner ring alignment and ball entry: First, the extension end of the second cylinder 29 is extended, which drives the translation seat 27 to move. The inner support plate 25 drives the inner ring of the bearing to move and reset to the center of the outer ring. Under the action of the inner ring movement, the balls enter the raceway between the inner and outer rings. During this process, the elastic telescopic rod 9 extends adaptively according to the height of the bearing raceway, the end sleeve 12 performs radial displacement compensation, and the ball receiving groove 3 changes with the position of the balls.

[0052] The swing arm 5 unfolds and distributes the balls: The starting motor 17 reverses, and through gear transmission, it drives the tail swing arm 5 to swing in the opposite direction. All swing arms 5 unfold synchronously into a circle. The ball receiving groove 3 moves in a circle along the arc-shaped through hole 10 with the swing arm 5, which drives the adsorbed balls to move synchronously. As the swing arm 5 unfolds evenly, the balls are initially evenly distributed around the circumference with the ball receiving groove 3. The first cylinder 26 is started to retract, so that the inner support plate 25 rises and disengages from the inner ring of the bearing. The horizontal position of the inner ring of the bearing is restricted by the balls.

[0053] Device reset: The electromagnetic base 11 is de-energized, causing the ball receiving groove 3 to reset into the arc-shaped through hole 10 without protruding from the surface of the bearing platform 1. The motor 17 rotates forward again, driving the swing rod 5 to fold and reset, and the ball receiving groove 3 returns to the initial position corresponding to the ball dropping tube 2. The third cylinder 24 retracts, the movable clamp 22 releases the outer ring of the bearing, and the bearing that has completed ball separation can be removed from the bearing platform 1 and enter the subsequent cage pressing and other processes. The entire device reset is completed, waiting for the next set of bearings to be assembled.

[0054] Bearings are precision devices, and this assembly unit is located in a clean assembly station within a dust-free workshop. The dust-free workshop is equipped with air filtration systems to prevent the presence of iron filings or dust in the assembly environment, ensuring that no impurities enter the bearing during assembly. The inner and outer rings and balls of the bearing undergo surface cleaning treatment before assembly to prevent them from carrying impurities into the assembly station. After ball separation, the cage is installed, grease is injected, and the sealing cap is installed sequentially to complete the internal sealing of the bearing.

[0055] To ensure the service life and assembly accuracy of the device, the materials and selection of the core components in this embodiment are preferred as follows: the support platform 1, swing rod 5, connecting rod 6, and slider 7 are all forged from No. 45 steel and precision machined, with galvanized anti-rust treatment to ensure structural strength and rigidity and avoid deformation during swinging; the ball receiving groove 3 is made of engineering plastic (polytetrafluoroethylene), and its groove surface is polished to avoid scratching the ball surface; a miniature DC electromagnetic base 11 is selected to match the size of the ball receiving groove 3, ensuring stable adsorption and no residual magnetism after power failure; the elastic telescopic rod 9 is a stainless steel spring telescopic rod with moderate elasticity; a stepper motor 17 is selected to precisely control the rotation angle and speed, ensuring uniform speed of swing rod 5 unfolding / folding.

[0056] The bearing assembly device of the present invention can be linked and controlled by the PLC control system to realize the automation of bearing positioning, ball loading, ball separation and unloading. It is suitable for assembling ball bearings of different specifications. Only the ball receiving groove 3, inner support plate 25 and movable clamping block 22 of the corresponding size need to be replaced, which has strong versatility.

[0057] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bearing assembly device, characterized in that, The bearing includes a support platform (1) supporting the inner and outer rings of the bearing, several ball drop tubes (2) for placing balls between the inner and outer rings, and several ball receiving grooves (3) corresponding to the ball drop tubes (2). The ball receiving grooves (3) are evenly distributed along an arc. A fixed shaft (4) is connected to the lower side of the support platform (1). Several rocker arms (5) corresponding to the ball receiving grooves (3) are provided on the outer side of the fixed shaft (4). The ends of the rocker arms (5) are supported on the lower side of the ball receiving grooves (3). The middle of the rocker arms (5) is between The first and last ends are connected by several hinged connecting rods (6). The first end swing rod (5) is fixedly connected to the fixed shaft (4), and the remaining swing rods (5) are hinged to the fixed shaft (4). The last end swing rod (5) rotates actively. A slider (7) is radially slidably connected in the middle of the swing rod (5). One end of the connecting rod (6) is hinged to the swing rod (5), and the other end is hinged to the slider (7) of the adjacent swing rod (5). The support (1) is provided with an arc-shaped through hole (10) for the ball groove body (3) to move.

2. The bearing assembly device according to claim 1, characterized in that, The connecting rod (6) has two layers, and the two layers of connecting rod (6) are located on the upper and lower sides of the swing rod (5) respectively; the single-layer connecting rod (6) is connected end to end in an arc-shaped sawtooth shape, and the two layers of connecting rod (6) are staggered and correspond to each other.

3. The bearing assembly device according to claim 2, characterized in that, The swing arm (5) has a strip hole (8) in the middle, and the slider (7) passes through the strip hole (8) and slides along the strip hole (8).

4. The bearing assembly device according to claim 1, characterized in that, The ball receiving groove (3) is connected to an elastic telescopic rod (9) on its lower side. The elastic telescopic rod (9) is supported between the upper side of the end of the swing rod (5) and the ball receiving groove (3). The upper part of the elastic telescopic rod (9) and the ball receiving groove (3) are located in the arc-shaped through hole (10).

5. The bearing assembly device according to claim 4, characterized in that, An electromagnetic base (11) is embedded in the bottom of the ball receiving groove (3). When the electromagnetic base (11) is energized, it generates a magnetic attraction force on the ball.

6. The bearing assembly device according to claim 1 or 4, characterized in that, An end sleeve (12) is fitted on the outer side of the end of the swing rod (5), and an elastic rope (14) is connected between the end sleeve (12) and the end of the swing rod (5).

7. The bearing assembly device according to claim 1, characterized in that, The fixed shaft (4) passes through the lower end of the rocker arm (5) and is connected to a fixed seat (15). The fixed seat (15) is equipped with a drive gear (16) and a motor (17) that drives the drive gear (16) to rotate. The tail rocker arm (5) is connected to a driven gear (18) that meshes with the drive gear (16).

8. The bearing assembly device according to claim 1, characterized in that, The upper side of the support (1) is provided with a bracket (20), and a hoop (19) surrounding the ball drop tube (2) is provided on one side of the bracket (20).

9. The bearing assembly device according to claim 1, characterized in that, The bearing platform (1) has upward-bent folded edges (21) on both sides, and a movable clamping block (22) for clamping the outer ring of the bearing is provided on one side of the bearing platform (1).

10. The bearing assembly device according to claim 9, characterized in that, The support platform (1) is provided with an inner support plate (25) extending into the inner ring of the bearing and a first cylinder (26) for driving the inner support plate (25) to rise and fall. The upper side of the support platform (1) is provided with a translation seat (27) supporting the first cylinder (26) and a second cylinder (29) for driving the translation seat (27) to translate.

Images