A sleeve device for bearing assembly

Abstract

The application discloses a sleeve device for bearing assembly and belongs to the technical field of bearing machining, comprising: a device main body for fixing the whole device assembly, an inside of the device main body being provided with a controller for controlling the whole device work; further comprising: a fixing base, a guide groove being arranged on one side of the fixing base, and a collecting groove being installed on the bottom of one end of the guide groove through bolts. The device takes a hydraulic cylinder single power source as a core, completes the whole process coupling of blanking, stepping, press fitting, ejection and resetting through the reciprocating linear motion of the lifting plate, realizes the one-time accurate sleeve fitting of the bearing body and the bearing seat in the sliding plate hole position, when the hole position reaches the press fitting center, the ejector rod continues to go down to complete the interference press fitting, forms a closed loop cycle without manual intervention, thereby significantly shortens the tact time, improves the equipment utilization rate and the operation safety.

Description

Technical Field

[0001] This application relates to the field of bearing processing technology, and in particular to a bearing assembly assembly device. Background Technology

[0002] A bearing assembly fitting device is a specialized piece of equipment used in the final stage of bearing manufacturing to press the pre-assembled bearing body (inner ring, outer ring, cage, and rolling elements) into the groove on the bearing housing surface in one go, so that the two form a specified interference fit and complete the final fitting.

[0003] In existing production sites, such devices generally adopt a "single-piece pressing" mode: after each pressing action is completed, the entire equipment must be completely stopped; then the operator enters the work area, manually loosens the clamps, removes the finished product that has just been pressed, and then places the next set of bearing housings and bearing bodies into the positioning cavity in sequence. Only after the clamps are tightened again can the equipment be restarted for the next pressing. Because the clamping, disassembly, and pressing actions are strictly sequential in time, the equipment cannot form a continuous operation cycle, resulting in a large amount of time being wasted on manual assistance.

[0004] At the same time, operators need to maintain a high level of concentration for a long time to complete frequent and repetitive actions such as positioning, clamping, loosening, picking up and placing parts, which significantly increases the labor intensity and poses safety hazards due to the repeated entry of the arm into the pressing area. Summary of the Invention

[0005] One of the objectives of this application is to provide a bearing assembly assembly device that solves the problem that existing bearing assembly devices require manual disassembly and re-clamping after each press-fitting, making continuous automatic operation impossible.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: a bearing assembly assembly device, comprising: a device body for fixing the overall assembly of the device, wherein a controller is provided inside for controlling the overall operation of the device; further comprising: a fixed base; a guide groove is provided on one side of the fixed base, and a collection groove is installed at the bottom of one end of the guide groove by bolts for collecting the assembled bearings; a pressure mechanism is installed on the top of the fixed base, a drive mechanism is connected to one side of the pressure mechanism, a conveying mechanism is provided below the pressure mechanism, the conveying mechanism is used to convey the bearing assembly, the conveying mechanism is in sliding contact with the bottom of the unloading mechanism, the unloading mechanism is installed above the limiting mechanism, and the limiting mechanism is connected to the fixed base.

[0007] Preferably, the unloading mechanism includes two supports, each with a material pipe mounted on its top for storing the bearing body and bearing seat, respectively. A guide block is mounted on one side of each support, and a support plate is positioned below the support, with a gap between the support plate and the bottom of the support. The support plate is fitted onto the top end of an electric telescopic cylinder, which is mounted on a fixed base surface. A spring block is positioned below the unloading pipe near the limiting mechanism, with a spring at its bottom, and the spring block is embedded inside the support plate. The spring block has sloping sides. Each of the two supports has a handle... The actuator cylinder extends its telescopic end when the conveying mechanism is resetting, restricting the downward flow of material from the two troughs. When the conveying mechanism moves to the initial position, the actuator retracts, allowing material to continue falling into the two troughs. This material feeding mechanism, through the combination of dual-channel storage and intermittent feeding, ensures that the bearing body and bearing seat automatically and orderly fall into the same position each time the conveying mechanism reaches its destination. This avoids the pauses and errors caused by manual feeding and uses spring blocks to prevent excess material from falling prematurely. This ensures precise connection with subsequent conveying and pressing cycles, significantly reducing waiting time and improving the stability of continuous operation.

[0008] Preferably, the conveying mechanism includes a sliding plate, which is connected to a positioning plate by screws. The top of the positioning plate is tightly fitted to the bottom of the sliding plate. A telescopic block is provided at the bottom of the positioning plate. Multiple telescopic blocks are distributed symmetrically at equal intervals. A first spring is provided on one side of each telescopic block, and one end of the first spring is embedded in the surface of a lever. The lever is connected to the side of the positioning plate by screws. This conveying mechanism connects the material dropping, pressing, and unloading positions in the same continuous stroke through the synchronous movement of the sliding plate and the positioning plate. The elastic clamping formed by the telescopic block and the spring provides temporary support when the bearing reaches the pressing position and automatically avoids it after pressing. This allows the bearing to be stably transmitted, positioned, and released without manual intervention, thereby significantly shortening the downtime, reducing labor intensity, and improving the continuous operation reliability of the entire machine.

[0009] Preferably, both the sliding plate and the positioning plate have multiple circular slots on their surfaces, with the diameter of the circular slots matching that of the bearing body and bearing seat. The positioning plate has multiple annular protrusions on its surface. The bottom of the sliding plate is embedded in the annular protrusions on the positioning plate. The telescopic block has protrusions on its surface, with a T-shaped cross-section. The telescopic block is slidably connected to the bottom groove of the positioning plate via these protrusions. The bottom of the telescopic block has a groove. This structure utilizes the precise fit between the slots and the annular protrusions to ensure that the bearing body and bearing seat remain coaxially positioned during sliding. The sliding relationship between the T-shaped protrusions and the groove allows the telescopic block to expand smoothly and quickly return to its original position under pressure. This ensures rigid support during pressing and automatic avoidance after pressing, thereby achieving continuous and accurate conveying and releasing without additional drive, significantly reducing pauses and improving operational smoothness.

[0010] Preferably, the inner side of the telescopic block is provided with a semi-circular groove, and the groove between two adjacent telescopic blocks is circular when they are joined together. The edge of the semi-circular groove on the inner side of the telescopic block is sloping, and the bottom diameter of the circular groove on the inner side of the two telescopic blocks is smaller than the diameter of the bearing and the bearing seat. This structure forms an expandable support circular hole by joining a pair of telescopic blocks with sloping semi-circular grooves. The bottom diameter of the hole is slightly smaller than the diameter of the workpiece, so that the bearing body and the bearing seat are automatically guided and reliably clamped by the slope when entering the press position. During the press, the telescopic block expands outward under force and makes room. After the press is completed, it quickly resets with the help of elasticity, realizing a clamping-release cycle without additional drive, which not only ensures positioning accuracy but also shortens the cycle time and reduces the need for manual intervention.

[0011] Preferably, the limiting mechanism includes a support, which is bolted to the surface of a fixed base. Two sliding rods are mounted on the surface of the support, and a second spring is fitted around each sliding rod. The sliding rods are slidably connected to both ends of the locking block. One top end of the locking block has a sloping structure, and the locking block engages with the bottom of the telescopic block through a lifting mechanism. A connecting block is mounted on the surface of the locking block, and the connecting block contacts the telescopic end of a micro cylinder. The micro cylinder is embedded in one top end of the support, and the two sides of the top of the support are connected to the telescopic block through a third spring. This limiting mechanism, with the one-way locking function formed by the sloping engagement and spring reset, automatically prevents the conveyor mechanism from reversing when it moves forward, ensuring cycle accuracy. When the end-of-stroke sensor is triggered, the micro cylinder instantly releases the lock, and the third spring quickly pulls the conveyor mechanism back to complete the reset. The entire process can achieve continuous reciprocating motion without manual intervention, thereby effectively shortening the cycle time and improving the stability and safety of continuous operation.

[0012] Preferably, the pressure mechanism includes a hydraulic cylinder, which is fixedly installed inside the top plate. The top plate is fixedly connected to one end of the guide column. The outside of the guide column slides in contact with the lifting plate. The lifting plate is fitted onto the outside of the telescopic end of the hydraulic cylinder. A push rod is provided at the bottom of the lifting plate, and a stamping seat is provided below the push rod. The stamping seat is embedded in the surface of the bottom plate, and a limit rod is embedded in the surface of the bottom plate. This pressure mechanism, through hydraulic drive and sliding cooperation with the guide column, enables the lifting plate to drive the push rod to complete a rapid downward and return stroke along a fixed trajectory. With the rigid constraint of the stamping seat and the limit rod, the bearing body can be accurately pressed into the bearing seat and the required interference can be maintained in a single stroke. The entire pressing process is synchronized with the conveying cycle, and finished products can be continuously output without interruption, thereby significantly shortening the cycle time and improving the assembly efficiency and consistency.

[0013] Preferably, the drive mechanism includes a connecting seat and a top column. The connecting seat is connected to the lifting plate by bolts. A column is installed at one end of the connecting seat by bolts. The top two ends of the column are connected to the top end of the lever by a fourth spring. There are two levers, which are rotatably connected to the connecting seat by a shaft. The bottom end of the lever has a sloping structure and slides in contact with the surface of the guide groove. The top column is embedded in the bottom of the lifting plate. This drive mechanism uses the reciprocating motion of the lifting plate as the sole power source. The pressing stroke is synchronously converted into the stepping displacement of the conveying mechanism through the connecting seat: when moving downward, the sloping lever cooperates with the guide groove to push the conveying mechanism forward and position it. When moving upward, the top column pushes the finished product out to complete the unloading. During the return stroke, each component automatically resets under the action of the springs. The entire cycle does not require additional motors or manual intervention, realizing seamless connection of the three actions of pressing, feeding, and unloading, thereby significantly shortening the cycle time and improving the stability and safety of continuous operation of the whole machine.

[0014] Compared with the prior art, the beneficial effects of this application are as follows:

[0015] This device uses a hydraulic cylinder as its core power source, and completes the entire coupling process of unloading, stepping, pressing, ejection, and resetting through the reciprocating linear motion of the lifting plate: During the downward phase, the lifting plate drives the connecting seat and the ramp lever to move down synchronously. The lever and the guide groove produce a wedge-like sliding, thereby converting the hydraulic thrust into the precise stepping displacement of the conveying mechanism, so that the bearing body and the bearing seat can achieve a precise fit in the sliding plate hole; when the hole reaches the pressing center, the push rod continues to move down to complete the interference fit. During the return phase, the lifting plate moves up, the push rod continues to move down, and the push column moves down accordingly to fit the bearing in the previous hole. The telescopic block, pushed downward from the positioning plate, elastically avoids and instantly resets under the guidance of the slope and the first spring, ensuring that the finished product falls smoothly into the guide groove without any jamming. The entire sliding process is prevented from reverse movement of the conveying mechanism by a one-way locking mechanism consisting of a locking block and a second spring, ensuring stepping accuracy. When the conveying mechanism reaches the front end, the infrared sensor in the bracket sends a signal immediately, and the micro cylinder drives the connecting block to move down to release the lock. The third spring quickly pulls the conveying mechanism back to the initial position, forming a closed loop that does not require manual intervention, thereby significantly shortening the cycle time and improving equipment utilization and operational safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the internal structure of the present invention.

[0018] Figure 3 This is a schematic diagram of the guide groove and material trough structure of the present invention.

[0019] Figure 4 This is a schematic diagram of the drive mechanism structure of the present invention.

[0020] Figure 5 This is a schematic diagram of the pressure mechanism structure of the present invention.

[0021] Figure 6 This is a schematic diagram of the material feeding mechanism of the present invention.

[0022] Figure 7 This is a schematic diagram of the spring block structure of the present invention.

[0023] Figure 8 This is a schematic diagram of the micro cylinder structure of the present invention.

[0024] Figure 9 This is a schematic diagram of the limiting mechanism structure of the present invention.

[0025] Figure 10 This is a schematic diagram of the conveying mechanism of the present invention.

[0026] Figure 11 For the present invention Figure 10 Enlarged structural diagram at point A in the middle.

[0027] In the diagram: 1. Main body of the device; 2. Fixed base; 3. Guide groove; 4. Collection groove; 5. Material feeding mechanism; 501. Support; 502. Material pipe; 503. Guide block; 504. Pallet; 505. Electric telescopic cylinder; 506. Spring block; 6. Conveying mechanism; 601. Slide plate; 602. Positioning plate; 603. Telescopic block; 604. Pulley block; 605. First spring; 7. Limiting mechanism; 701. Support; 702. Slide rod; 703. 704. Second spring; 705. Locking block; 706. Connecting block; 707. Third spring; 708. Miniature cylinder; 809. Pressure mechanism; 8001. Hydraulic cylinder; 801. Lifting plate; 802. Top rod; 803. Guide column; 804. Top plate; 805. Stamping seat; 806. Base plate; 807. Limiting rod; 908. Drive mechanism; 901. Connecting seat; 902. Column; 903. Fourth spring; 904. Lever; 905. Top column. Detailed Implementation

[0028] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0029] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0030] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0031] Example 1:

[0032] One preferred embodiment of this application, such as Figures 1 to 11As shown, a bearing assembly assembly device includes: a main body 1 for fixing the overall assembly of the device, with a controller inside for controlling the overall operation of the device; and a fixed base 2; a guide groove 3 is provided on one side of the fixed base 2, and a collection groove 4 is bolted to the bottom of one end of the guide groove 3 for collecting the assembled bearings; a pressure mechanism 8 is installed on the top of the fixed base 2, a drive mechanism 9 is connected to one side of the pressure mechanism 8, and a conveying mechanism 6 is provided below the pressure mechanism 8 for conveying the bearing assembly; the conveying mechanism 6 slides in contact with the bottom of the unloading mechanism 5; the unloading mechanism 5 is installed above the limiting mechanism 7, and the limiting mechanism 7 is connected to the fixed base 2.

[0033] This embodiment integrates the functions of material feeding, conveying, positioning, pressing, and finished product collection into the same motion cycle. Each mechanism works in a predetermined sequence to achieve continuous supply, synchronous positioning, and immediate pressing of the bearing body and bearing seat. This significantly reduces the downtime caused by manual disassembly and assembly in the prior art. At the same time, the streamlined linkage reduces the frequency of manual intervention, and operators can monitor the operation in a safe area, thus reducing both labor intensity and safety hazards.

[0034] Example 2:

[0035] One preferred embodiment of this application, such as Figures 1 to 11As shown, a bearing assembly assembly device includes a feeding mechanism 5 comprising two supports 501. Each support 501 has a feeding tube 502 mounted on its top, used to store the bearing body and bearing seat respectively. A guide block 503 is mounted on one side of each support 501, and a support plate 504 is positioned below each support 501. A gap exists between the support plate 504 and the bottom of the support 501. The support plate 504 is fitted onto the top end of an electric telescopic cylinder 505, which is mounted on a fixed base 2. On the surface, a spring block 506 is provided below the material drop pipe 502 near the limiting mechanism 7, and a spring is provided at the bottom of the spring block 506. The spring block 506 is embedded inside the support plate 504, and the two sides of the spring block 506 are sloped. The conveying mechanism 6 includes a slide plate 601, which is connected to the positioning plate 602 by screws. The top of the positioning plate 602 is tightly fitted to the bottom of the slide plate 601. A telescopic block 603 is provided at the bottom of the positioning plate 602. Multiple telescopic blocks 603 are distributed symmetrically at equal intervals. A first spring 605 is provided on one side of block 603, and one end of the first spring 605 is embedded in the surface of the lever block 604. The lever block 604 is connected to the side of the positioning plate 602 by screws. Both the slide plate 601 and the positioning plate 602 have multiple circular slots on their surfaces, and the diameter of the circular slots is the same as that of the bearing body and the bearing seat. The surface of the positioning plate 602 has multiple annular protrusions. The bottom of the slide plate 601 is embedded outside the annular protrusions on the surface of the positioning plate 602. The surface of the telescopic block 603 has protrusions. The structure has a T-shaped cross-section for the protruding structure on the surface of the telescopic block 603, and the telescopic block 603 is slidably connected to the bottom groove of the positioning plate 602 through the protruding structure. The bottom of the telescopic block 603 is provided with a groove. The inner side of the telescopic block 603 is provided with a semi-circular hole, and the hole between two adjacent telescopic blocks 603 is circular when they are spliced ​​together. The edge of the semi-circular hole on the inner side of the telescopic block 603 is sloping, and the bottom diameter of the circular hole on the inner side of the two telescopic blocks 603 is smaller than the diameter of the bearing and the bearing seat.

[0036] The limiting mechanism 7 includes a support 701, which is bolted to the surface of the fixed base 2. Two sliding rods 702 are mounted on the surface of the support 701. A second spring 703 is fitted around each sliding rod 702, and the sliding rods 702 are slidably connected to both ends of a locking block 704. One end of the locking block 704 has a sloping structure, and it engages with the bottom of a telescopic block 603 via a lifting mechanism. A connecting block 705 is mounted on the surface of the locking block 704, and it contacts the telescopic end of a micro cylinder 707. The micro cylinder 707 is embedded in one end of the top of the support 701. The top two sides of the support 701 are connected to the telescopic block 603 via third springs 706. The pressure mechanism 8 includes a hydraulic cylinder 801, which is fixedly installed inside the top plate 805. The top plate 805 is fixedly connected to one end of the guide column 804, and the guide column 804 is externally connected to the lifting mechanism. The lifting plate 802 is in sliding contact with the hydraulic cylinder 801. The lifting plate 802 is fitted outside the telescopic end of the hydraulic cylinder 801. A top rod 803 is provided at the bottom of the lifting plate 802. A stamping seat 806 is provided below the top rod 803. The stamping seat 806 is embedded in the surface of the base plate 807. A limit rod 808 is embedded in the surface of the base plate 807. The drive mechanism 9 includes a connecting seat 901 and a top column 905. The connecting seat 901 is connected to the lifting plate 802 by bolts. A column 902 is installed at one end of the connecting seat 901 by bolts. The top two ends of the column 902 are connected to the top end of the lever 904 by a fourth spring 903. There are two levers 904. The two levers 904 are rotatably connected to the connecting seat 901 by a shaft. The bottom end of the lever 904 has a sloping structure and slides in contact with the surface of the guide groove 3. The top column 905 is embedded in the bottom of the lifting plate 802.

[0037] In use, the device stores the bearing body and bearing seat separately inside two material tubes 502. The downward extension of the hydraulic cylinder 801 moves the lifting plate 802 downwards. Simultaneously, the lifting plate 802 moves the connecting seat 901 downwards, causing the bottom of the levers 904 on both sides of the connecting seat 901 to slide into contact with the surface of the guide groove 3. This causes one end of the lever 904 to move forward, contacting the lever block 604. The lever block 604 then moves the conveying mechanism 6 forward a specified distance. Each time the pressure mechanism 8 presses, it can drive the conveying mechanism 6 to move forward a specified distance. While the conveying mechanism 6 is moving, it will drive the top slide plate 601 to move. When the slot on the surface of the slide plate 601 passes through the bottom of the two material tubes 502, the bearing body and bearing seat inside the two material tubes 502 will fall into the same slot on the surface of the slide plate 601. Then, when the bearing body and bearing seat move into the pressure mechanism 8 with the conveying mechanism 6, the bearing body can be pressed into the bearing seat by the push rod 803 to complete the fitting.

[0038] As the assembled bearing continues to move forward with the conveying mechanism 6, each downward movement of the lifting plate 802 causes the top column 905 to move downward, thus pushing the bearing inside the positioning plate 602 downward. When the assembled bearing is pushed downward, the telescopic blocks 603 move to the sides, compressing the first spring 605. When the bearing falls onto the surface of the guide groove 3 between the two telescopic blocks 603, the first spring 605 causes the telescopic blocks 603 to reset. Each time the conveying mechanism 6 moves forward, the second spring 703 causes the top of the locking block 704 to engage with the telescopic blocks 603. The bottom locking connection helps prevent the conveying mechanism 6 from moving backward. When the conveying mechanism 6 moves forward, it can pull the third spring 706. When the conveying mechanism 6 moves to the front end, it will be detected by the infrared sensor installed inside the bracket 501. The infrared sensor can then feed the signal back to the remote terminal, which will cause the micro cylinder 707 to drive the connecting block 705 to move downward. As the connecting block 705 moves downward, it can also drive the locking block 704 to move downward, thereby releasing the locking of the limiting mechanism 7. Under the pressure of the third spring 706, the conveying mechanism 6 can be reset to the initial position, so as to continue conveying.

[0039] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A bearing assembly assembly sleeve device, comprising: The main body (1) of the device is used to fix the overall components of the device. It is equipped with a controller inside to control the overall operation of the device. The device is characterized by further including: a fixed base (2); a guide groove (3) is provided on one side of the fixed base (2), and a collection groove (4) is installed at the bottom of one end of the guide groove (3) by bolts for collecting the assembled bearings. A pressure mechanism (8) is installed on the top of the fixed base (2), and a drive mechanism (9) is connected to one side of the pressure mechanism (8). A conveying mechanism (6) is provided below the pressure mechanism (8). The conveying mechanism (6) is used to convey the bearing components. The conveying mechanism (6) slides in contact with the bottom of the unloading mechanism (5). The unloading mechanism (5) is installed above the limiting mechanism (7). The limiting mechanism (7) is connected to the fixed base (2). The conveying mechanism (6) includes a slide plate (601), which is connected to a positioning plate (602) by screws. The top of the positioning plate (602) is tightly fitted to the bottom of the slide plate (601). A telescopic block (603) is provided at the bottom of the positioning plate (602). Multiple telescopic blocks (603) are distributed symmetrically at equal intervals. A first spring (605) is provided on one side of the telescopic block (603), and one end of the first spring (605) is embedded in the surface of the lever (604). The lever (604) is connected to the side of the positioning plate (602) by screws. The pressure mechanism (8) includes a hydraulic cylinder (801), which is fixedly installed inside the top plate (805). The top plate (805) is fixedly connected to one end of the top of the guide column (804). The outside of the guide column (804) is in sliding contact with the lifting plate (802). The lifting plate (802) is fitted outside the telescopic end of the hydraulic cylinder (801). A top rod (803) is provided at the bottom of the lifting plate (802). A stamping seat (806) is provided below the top rod (803). The stamping seat (806) is embedded in the surface of the bottom plate (807). A limit rod (808) is embedded in the surface of the bottom plate (807). The drive mechanism (9) includes a connecting seat (901) and a top column (905). The connecting seat (901) is connected to the lifting plate (802) by bolts. One end of the connecting seat (901) is fitted with a column (902) by bolts. The top two ends of the column (902) are connected to the top end of the lever (904) by a fourth spring (903). There are two levers (904). The two levers (904) are rotatably connected to the connecting seat (901) by a shaft. The bottom end of the lever (904) has a sloping structure and slides in contact with the surface of the guide groove (3). The top column (905) is embedded in the bottom of the lifting plate (802). The device uses a hydraulic cylinder as its core power source and completes the entire process of material feeding, stepping, pressing, ejection and resetting through the reciprocating linear motion of the lifting plate.

2. The bearing assembly sleeve device as described in claim 1, characterized in that: The material feeding mechanism (5) includes a bracket (501), and there are two brackets (501). The top of each bracket (501) is equipped with a material tube (502) for storing the bearing body and the bearing seat, respectively. A guide block (503) is installed on one side of the bracket (501), and a tray (504) is provided below the bracket (501). There is a gap between the tray (504) and the bottom of the bracket (501), and the tray (504) is fitted onto the top end of the electric telescopic cylinder (505). The electric telescopic cylinder (505) is installed on the surface of the fixed base (2). A spring block (506) is provided below the material feeding tube (502) near the limiting mechanism (7), and a spring is provided at the bottom of the spring block (506). The spring block (506) is embedded in the tray (504), and the two sides of the spring block (506) are sloped.

3. The bearing assembly sleeve device as described in claim 2, characterized in that: The surfaces of the slide plate (601) and the positioning plate (602) are provided with multiple circular holes and grooves, and the diameter of the circular holes and grooves is the same as that of the bearing body and the bearing seat. The surface of the positioning plate (602) is provided with multiple annular protrusions. The bottom of the slide plate (601) is embedded in the outside of the annular protrusions on the surface of the positioning plate (602). The surface of the telescopic block (603) is provided with a protrusion, and the cross-section of the protrusion on the surface of the telescopic block (603) is T-shaped. The telescopic block (603) is slidably connected to the bottom groove of the positioning plate (602) through the protrusion. The bottom of the telescopic block (603) is provided with a groove.

4. The bearing assembly sleeve device as described in claim 3, characterized in that: The inner side of the telescopic block (603) is provided with a semi-circular groove, and the groove between two adjacent telescopic blocks (603) is circular when they are joined together. The edge of the semi-circular groove on the inner side of the telescopic block (603) is sloping, and the bottom diameter of the circular groove on the inner side of the two telescopic blocks (603) is smaller than the diameter of the bearing and the bearing seat.

5. The bearing assembly sleeve device as described in claim 4, characterized in that: The limiting mechanism (7) includes a support (701), which is bolted to the surface of the fixed base (2). Two sliding rods (702) are installed on the surface of the support (701). A second spring (703) is fitted on the outside of the sliding rod (702). The sliding rod (702) is slidably connected to both ends of the locking block (704). The top end of the locking block (704) has a sloping structure. The locking block (704) engages with the bottom of the telescopic block (603) through a lifting mechanism. A connecting block (705) is installed on the surface of the locking block (704). The connecting block (705) contacts the telescopic end of the micro cylinder (707). The micro cylinder (707) is embedded in the top end of the support (701). The top two sides of the support (701) are connected to the telescopic block (603) through a third spring (706).

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