A bearing press fitting mechanism and method

Abstract

The application relates to the technical field of mechanical production and assembly, in particular to a bearing press-fitting mechanism and method. The bearing press-fitting mechanism comprises a hydraulic cylinder with at least two cylinder cavities and rod bodies; the at least two rod bodies are synchronously moved; a supporting frame is provided with a positioning pin at the bottom end, the positioning pin is positioned in cooperation with a hole on a flange; a top pressing device is provided with a push plate and a sleeve; a protective sleeve is embedded in the sleeve, the protective sleeve is in contact with the outer periphery of a shaft; the protective sleeve is outwardly extended at the end of the sleeve to form a first flange, the first flange is pressed on the inner ring and the outer ring of a bearing; a controller is electrically connected with the hydraulic cylinder to control oil supply or oil return of the hydraulic cylinder. The bearing press-fitting mechanism and method provided by the application form a whole through a hydraulic device, a positioning supporting frame and a sleeve assembly, respectively play the functions of driving, positioning and press-fitting, mutually cooperate, complement each other, realize single-time press-fitting of multiple bearings, and the press-fitting operation is simple, the press-fitting process is stable, the press-fitting is in place, and the purpose of guaranteeing that the bearings and other parts are not damaged is achieved.

Description

Technical Field

[0001] This invention relates to the field of mechanical production and assembly technology, specifically to a bearing press-fitting mechanism and method. Background Technology

[0002] Rotating machinery refers to machinery whose main function is accomplished by rotational motion; the main function of bearings is to support the rotating body of the machinery, ensure the working position and accuracy of the shaft and the transmission components on the shaft, reduce friction and wear, and bear the load; therefore, bearings are one of the key components of rotating machinery, and the installation of bearings is a key point in the production and assembly of rotating machinery.

[0003] In existing technologies, during bearing installation, self-made tooling is often used to manually press the bearing onto the shaft. However, this installation method can only press in one bearing at a time, and it also requires disassembling and assembling the tooling needed for the pressing operation. The operation involves many steps, is cumbersome, time-consuming, labor-intensive, and inefficient. Furthermore, manual pressing operation has the defects of inaccuracy, instability, and unreliability, which can easily lead to overpressure or imbalance during pressing, thereby damaging the bearing or shaft, or improper pressing, affecting mechanical performance. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the prior art that can only press-fit a single bearing at a time, and the pressing operation is cumbersome, the pressing process is unstable and prone to incomplete pressing, damage to bearings and other components. Thus, the present invention provides a bearing pressing mechanism and method that can press-fit multiple bearings at a time, and the pressing operation is simple, the pressing process is stable and the pressing is in place, and the bearings and other components are protected from damage.

[0005] To solve the above-mentioned technical problems, the present invention provides a bearing press-fitting mechanism and method, comprising:

[0006] A hydraulic cylinder having at least two cylinder chambers and a rod having one end disposed within the cylinder chambers, the hydraulic cylinder being adapted to drive the rod to extend or retract.

[0007] At least two of the rods move synchronously;

[0008] A support frame is adapted to be detachably fixed above the part to be pressed; the hydraulic cylinder is fixed to the top of the support frame;

[0009] The support frame is provided with a positioning pin at its bottom end, which is adapted to be positioned in conjunction with a hole on the flange of the part to be pressed.

[0010] The pressing device has a push plate and sleeves; the rod is connected to the push plate, and at least two sleeves are connected to the side of the push plate away from the rod; the rod drives at least two sleeves to push the bearing downward synchronously.

[0011] The sleeve is fitted with a protective sleeve, which is adapted to contact the outer periphery of the shaft of the part to be pressed; the protective sleeve extends outward from the end of the sleeve to form a first flange, which is adapted to press against the inner and outer rings of the bearing.

[0012] The controller is electrically connected to the hydraulic cylinder and is adapted to control the oil supply or return of the hydraulic cylinder.

[0013] Optionally, it also includes: elastic buckles, at least two of the elastic buckles being disposed on the support frame;

[0014] The bottom end of the support frame is provided with at least two wing plates, and the positioning pin is provided on the wing plates;

[0015] The support frame is provided with ribs;

[0016] The elastic buckle includes a buckle plate and an elastic element;

[0017] The buckle has a latch arm and a hook extending from one end of the latch arm and bent into a hook shape;

[0018] The other end of the locking arm is hinged to the rib plate, and the hook is fastened to the wing plate;

[0019] One end of the elastic element is hinged to the latch arm, and the other end is hinged to the rib plate at a position below the latch arm, which is suitable for tightening the buckle plate by means of elastic force;

[0020] The end of the hook has a locking part;

[0021] When the wing plate abuts against the flange on the part to be pressed, the locking part is squeezed by the flange, and the locking plate moves outward;

[0022] After the wing plate fully abuts against the flange, the elastic element pulls the buckle back to its original position, and the hook locks onto the flange.

[0023] Optionally, the hydraulic cylinder has a cylinder liner and a cylinder head enclosed on one side of the cylinder liner;

[0024] At least two of the cylinder chambers are located within the cylinder liner;

[0025] The wall of the cylinder liner located between the cylinder cavities forms a channel through which the cylinder cavities are connected.

[0026] The cylinder head is provided with a liquid inlet, which is connected to the channel.

[0027] Optionally, it also includes: a guide sleeve, which is embedded in the cylinder cavity and sleeved on the rod body to provide guidance for the movement of the rod body.

[0028] Optionally, the top of the hydraulic cylinder is provided with a lifting lug, which is suitable for suspending the bearing press-fitting mechanism with the aid of a balancer.

[0029] Optionally, the sleeve is detachably connected to the push plate;

[0030] The rod body is detachably connected to the push plate;

[0031] The hydraulic cylinder is detachably connected to the support frame.

[0032] Optionally, the top of the support frame is provided with a through hole, through which the rod body passes and connects with the push plate.

[0033] Optionally, the end of the sleeve extends outward to form a second flange, and the first flange presses against the second flange.

[0034] A bearing press-fitting method, comprising:

[0035] Remove the suspended bearing pressing mechanism, align the locating pin with and insert it into the hole of the flange of the part to be pressed;

[0036] The flange plate presses against the flange, and the buckle plate is pushed outward by the flange, and then returns to its original position and fastens to the flange.

[0037] A bearing is fitted onto the shaft of the part to be pressed.

[0038] The controller controls the hydraulic cylinder to start, and at least two sleeves simultaneously push the bearing downward into the target bearing seat;

[0039] The controller controls the sleeve to move back to its original position.

[0040] The controller controls the sleeve to press the bearing again;

[0041] Pull the buckle plate outward to disengage the bearing pressing mechanism from the part to be pressed, and use a balancer to return the bearing pressing mechanism to its original position and suspend it.

[0042] The technical solution of this invention has the following advantages:

[0043] 1. The bearing press-fitting mechanism and method provided by this invention comprises a hydraulic device, a positioning support frame, and a sleeve assembly forming an integrated press-fitting mechanism, which respectively perform driving, positioning, and execution functions, cooperating and complementing each other. At least two sleeves are press-fitted simultaneously, and each sleeve is equipped with a protective sleeve to protect the shaft and bearing. The dual-shaft hydraulic drive provides strong power and stability, achieving the goal of press-fitting multiple bearings at once with simple operation, stable pressing process, and proper pressing, ensuring that the bearings and other components are not damaged. After pressing, the sleeves return to their initial position without needing to be removed. The system allows for the immediate pressing and installation of the next bearing, resulting in high pressing efficiency. The inner wall of the protective sleeve contacts the outer circumference of the shaft, protecting the shaft from damage. The first flange of the protective sleeve presses against the inner and outer rings of the bearing, ensuring balanced pressure on both rings. The system allows for the replacement of the appropriate sleeve type and number based on the shaft's specifications, dimensions, form, and quantity. It also allows for the replacement of the appropriate support frame based on the size and form of the rotating machinery, ensuring strong overall compatibility. The cylinder chambers within the hydraulic cylinders are interconnected and supplied with oil synchronously, ensuring synchronized movement of the rods and improving the stability of the pressing operation.

[0044] 2. The bearing press-fitting mechanism and method provided by the present invention comprises a buckle plate and an elastic element forming an elastic buckle. The buckle plate has a locking arm and a locking hook. The elastic element cooperates with the locking arm to make the buckle plate automatically return to its original position. The locking hook has a locking part to make the buckle plate automatically move outward to make room. This realizes that the positioning support frame automatically locks itself during the installation and positioning process. When disassembling, it is only necessary to pull open the buckle plate to separate the bearing press-fitting mechanism from the rotating mechanical body. No additional operation is required. The assembly and disassembly are quick, the assembly efficiency is high, the fixing is reliable, the operation is simple, and it saves time and effort. Attached Figure Description

[0045] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0046] Figure 1 This is a front view of the bearing press-fitting mechanism of the present invention;

[0047] Figure 2 This is a schematic diagram of the bearing press-fitting mechanism of the present invention;

[0048] Figure 3 This is an assembly diagram of the bearing press-fitting mechanism and the part to be press-fitted according to the present invention;

[0049] Figure 4 This is a cross-sectional view of the hydraulic cylinder of the present invention;

[0050] Figure 5This is a cross-sectional view of the cylinder liner of the present invention;

[0051] Figure 6 This is a schematic diagram of the support frame of the present invention;

[0052] Figure 7 This is a cross-sectional view of the support frame of the present invention;

[0053] Figure 8 This is a schematic diagram of the top-pressing device of the present invention;

[0054] Figure 9 This is a cross-sectional view of the top-pressing device of the present invention;

[0055] Figure 10 This is a schematic diagram of the controller of the present invention.

[0056] Explanation of reference numerals in the attached figures:

[0057] 1. Hydraulic cylinder; 11. Cylinder chamber; 12. Rod body; 13. Cylinder liner; 14. Cylinder head; 15. Channel; 16. Inlet; 17. Guide sleeve; 18. Lifting lug; 19. Piston; 2. Support frame; 21. Positioning pin; 22. Wing plate; 23. Through hole; 24. Rib plate; 3. Top pressing device; 31. Push plate; 32. Sleeve; 33. Protective sleeve; 34. First flange; 35. Second flange; 36. Screw hole; 4. Controller; 41. Automatic pressing button; 42. Automatic return button; 43. Manual return button; 44. Manual pressing button; 45. Emergency stop button; 5. Elastic buckle; 51. Buckle plate; 52. Elastic element; 53. Buckle arm; 54. Buckle hook; 55. Locking part; 6. Flange; 7. Shaft; 8. Bearing; 9. Part to be pressed; 91. Bearing seat. Detailed Implementation

[0058] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0059] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for 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. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0060] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0061] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0062] Example 1

[0063] Combination Figures 1-10 As shown, the bearing press-fitting mechanism provided in this embodiment includes:

[0064] Hydraulic cylinder 1 has at least two cylinder chambers 11 and a rod 12 with one end disposed in the cylinder chamber 11. Hydraulic cylinder 1 is adapted to drive the rod 12 to extend or retract.

[0065] At least two of the rods 12 move synchronously;

[0066] The support frame 2 is adapted to be detachably fixed above the pressing part 9; the hydraulic cylinder 1 is fixed to the top of the support frame 2;

[0067] The support frame 2 is provided with a positioning pin 21 at its bottom end, and the positioning pin 21 is adapted to be positioned in conjunction with the hole on the flange 6 of the part to be pressed 9.

[0068] The pressing device 3 has a push plate 31 and a sleeve 32; the rod 12 is connected to the push plate 31, and at least two sleeves 32 are connected to the side of the push plate 31 away from the rod 12; the rod 12 drives at least two sleeves 32 to push the bearing 8 downward synchronously.

[0069] The sleeve 32 is fitted with a protective sleeve 33, which is adapted to contact the outer periphery of the shaft of the part to be pressed 9; the protective sleeve 33 extends outward from the end of the sleeve 32 to form a first flange 34, which is adapted to press against the inner and outer rings of the bearing 8.

[0070] The controller 4 is electrically connected to the hydraulic cylinder 1 and is adapted to control the oil supply or return of the hydraulic cylinder 1.

[0071] It should be noted that the pressing part 9 is a partially rotating mechanical body; the rotating mechanical body has at least two shafts; the top of the hydraulic cylinder 1 is provided with a lifting lug 18, and the bearing pressing mechanism is suspended by a balancer when idle; the two cylinder chambers 11 inside the hydraulic cylinder 1 are connected, so that hydraulic oil enters the two cylinder chambers 11 at the same time and pushes the rod 12 to move synchronously; the hydraulic cylinder 1 is detachably fixed to the top of the support frame 2, and the wing plate 22 at the bottom of the support frame 2 and the flange 6 are abutted together by the cooperation of the positioning pin 21 and the hole, which plays the role of positioning and support; at least two elastic buckles 5 are respectively provided on the support frame 2 near the wing plate 22, and by means of the elastic extension and contraction function of the elastic element 52, the buckle plate 51 has the function of automatic offset and return to the buckle, so that the support frame 2 is automatically locked during the installation process.

[0072] Combination Figures 1-3 As shown, before pressing the bearing 8, the operator pulls down the suspended bearing pressing mechanism, aligns the positioning pin 21 located at the bottom of the support frame 2 with and inserts it into the hole on the flange 6. Since at least two positioning pins 21 are respectively located on opposite sides of the support frame 2, the positioning work between the bearing pressing mechanism and the rotating mechanical body is completed during the insertion of the positioning pins 21. During the insertion of the positioning pins 21, the wing plate 22 of the support frame 2 gradually approaches the end face of the flange 6. Since the hook 54 of the buckle plate 51 is engaged below the wing plate 22, the flange 6 contacts and presses against the locking part 55 on the hook 54, causing the buckle plate 51 to shift outward until the wing plate 22 is completely pressed against the flange 6. Then, the elastic element 52 pulls the buckle plate 51 back to its original position, and the hook 54 is engaged below the flange 6, so that the support frame 2 and the flange 6 are locked together. After the bearing pressing mechanism is fixed, each sleeve 32 is aligned with the shaft 7. The bearing 8 to be pressed is placed on the shaft 7, and then the control is pressed. Automatic pressing button 41 on device 4 presses down each sleeve 32 synchronously. A protective sleeve 33 is installed inside each sleeve 32. During pressing, the protective sleeve 33 contacts the outer wall of the shaft, protecting the shaft and guiding the movement of the sleeve 32. The first flange 34 on the protective sleeve 33, located at the end of the sleeve 32, presses against the bearing 8, and the first flange 34 contacts both the inner and outer rings of the bearing 8, ensuring balanced pressure on the inner and outer rings of the bearing 8. The first flange 34 pushes the bearing 8, causing it to move synchronously down into the target bearing seat 91. After confirming proper pressing, the automatic return button 42 on controller 4 is pressed, and the sleeve 32 moves back up, completing the single pressing. Subsequently, the controller 4 can be used to perform a second pressing of the bearing 8 to ensure proper pressing. After the bearing 8 is pressed, the buckle plate 51 is pulled outwards, separating the bearing pressing mechanism from the rotating mechanical body. The bearing pressing mechanism automatically returns to the suspension position with the help of the balancer, completing the pressing work, saving time and effort.

[0073] Optionally, the top of the support frame 2 has several through holes, and the support frame 2 is detachably connected to the hydraulic cylinder 1 by bolts. The support frame 2 can be selected to match different specifications and shapes of rotating mechanical bodies, which is highly practical. The push plate 31 is provided with several threaded holes, so that the sleeve 32 and the push plate 31, and the push plate 31 and the rod 12 are all connected by threads. The sleeve 32 can be selected to match different specifications and shapes of shafts, which is highly practical. The support frame 2 and the sleeve 32 can be replaced with different models according to actual needs, which is highly compatible.

[0074] Optionally, the controller 4 also has a manual pressing button 44, a manual return button 43, and an emergency stop button 45. The difference between manual pressing and automatic pressing is that after pressing the automatic pressing button 41, the hydraulic cylinder 1 automatically and continuously supplies oil until the pressing is in place, while manual pressing requires pressing or holding the manual pressing button 44 to control the oil supply of the hydraulic cylinder 1. The manual return process is similar. In case of a sudden special situation, the emergency stop button 45 can be pressed to stop the bearing pressing mechanism immediately.

[0075] Optionally, the number of sleeves 32 is selected according to the number of bearings 8 to be press-fitted in the rotating machinery body, specifically two, three or four.

[0076] Optionally, the number of cylinder chambers 11 and rods 12 in the hydraulic cylinder 1 can be selected according to the actual required pushing force, specifically two, three or four.

[0077] Optionally, the hydraulic cylinder 1 can be made of hard aluminum alloy, which meets the strength requirements and is more conducive to suspension and storage operations.

[0078] In this embodiment, the hydraulic device, positioning support frame 2, and sleeve 32 assembly form an integrated bearing press-fitting mechanism, which respectively perform driving, positioning, and execution functions, cooperating and complementing each other. At least two sleeves 32 are press-fitted simultaneously, and each sleeve 32 is equipped with a protective sleeve 33 to protect the shaft and bearing 8. The dual-shaft hydraulic drive provides strong power and stability, enabling the press-fitting of multiple bearings 8 in a single operation with simple operation, stable pressing process, and proper placement, ensuring that the bearings 8 and other components are not damaged. The inner wall of the protective sleeve 33... The protective sleeve 33 contacts the outer circumference of the shaft, protecting the shaft from damage. The first flange 34 of the protective sleeve 33 presses against the inner and outer rings of the bearing 8, ensuring that the pressure on the inner and outer rings of the bearing 8 is balanced. The sleeve 32 is replaced with the corresponding type and number according to the specifications, size, form and quantity of the shaft. The support frame 2 is replaced with a matching one according to the size and form of the rotating mechanical body, resulting in strong compatibility of the overall mechanism. The cylinder chambers 11 in the hydraulic cylinder 1 are all connected and supplied with oil in parallel and synchronously, so that the rods 12 move synchronously, improving the stability of the press-fitting operation.

[0079] Specifically, it also includes: elastic buckles 5, at least two of the elastic buckles 5 are provided on the support frame 2;

[0080] The bottom end of the support frame 2 is provided with at least two wing plates 22, and the positioning pin 21 is provided on the wing plate 22;

[0081] The support frame 2 is provided with ribs 24;

[0082] The elastic buckle 5 includes a buckle plate 51 and an elastic element 52;

[0083] The buckle 51 has a latch arm 53 and a latch hook 54 extending from one end of the latch arm 53 and bent into a hook shape;

[0084] The other end of the locking arm 53 is hinged to the rib plate 24, and the hook 54 is fastened to the wing plate 22;

[0085] One end of the elastic element 52 is hinged to the latch arm 53, and the other end is hinged to the rib plate 24 at a position below the latch arm 53, which is suitable for tightening the buckle plate 51 by means of elastic force.

[0086] The end of the hook 54 is formed with a locking part 55;

[0087] When the wing plate 22 abuts against the flange 6 on the part to be pressed 9, the locking part 55 is squeezed by the flange 6, and the buckle plate 51 moves outward;

[0088] After the wing plate 22 fully abuts against the flange 6, the elastic element 52 pulls the buckle plate 51 back to its original position, and the hook 54 locks onto the flange 6.

[0089] Combination Figures 6-7As shown, the support frame 2 is a frame structure with an open bottom, consisting of a top plate and a side plate. The hydraulic cylinder 1 is connected to the top plate. The push plate 31 and the sleeve 32 are located on the side of the top plate away from the hydraulic cylinder 1 and are also located within the frame structure. The rib plate 24 is perpendicularly connected to both the top plate and the side plate, serving to strengthen the support. A notch is provided at the junction of the top plate and the side plate. One end of the fastener 51 is located within the notch and is hinged to the rib plate 24 via a first pin. The other end is bent to form a hook 54 and fastened to the wing plate 22 of the support frame 2. One end of the elastic element 52 is hinged to the rib plate 24 via a second pin, and the other end is connected to the fastener. The clamping arm 53 of plate 51 is fixed; the end of the hook 54 has a locking part 55 with an inclined surface. During the assembly process of support frame 2 and rotating mechanical body, wing plate 22 gradually approaches flange 6. Since the hook 54 of clamping plate 51 is engaged under wing plate 22, flange 6 contacts and is pressed against the locking part 55 on hook 54. Clamping plate 51 automatically moves outward to make room until wing plate 22 is completely pressed against flange 6. Then elastic element 52 pulls and tightens clamping plate 51 so that it automatically returns to its original position. Hook 54 is engaged under flange 6, restricting the movement of support frame 2, so that support frame 2 and flange 6 are locked together.

[0090] Optionally, both the first pin and the second pin can be cotter pins, which serve to prevent the buckle plate 51 and the elastic element 52 from slipping off.

[0091] In this embodiment, the buckle plate 51 and the elastic element 52 form an elastic buckle 5, and the buckle plate 51 has a locking arm 53 and a locking hook 54. The elastic element 52 and the locking arm 53 cooperate to make the buckle plate 51 automatically return to its original position. The locking hook 54 has a locking part to make the buckle plate 51 automatically move outward to make room, so that the positioning support frame 2 can be automatically locked during the installation and positioning process. When disassembling, it is only necessary to pull open the buckle plate 51 to separate the bearing pressing mechanism from the rotating mechanical body. No additional operation is required. The assembly and disassembly are quick, the assembly efficiency is high, the fixing is reliable, the operation is simple, and it saves time and effort.

[0092] Specifically, the hydraulic cylinder 1 has a cylinder liner 13 and a cylinder head 14 closed on one side of the cylinder liner 13;

[0093] At least two of the cylinder chambers 11 are located within the cylinder liner 13;

[0094] The wall of the cylinder liner 13 located between the cylinder cavities 11 forms a channel 15, which is suitable for connecting the cylinder cavities 11.

[0095] The cylinder head 14 is provided with a liquid inlet 16, which is connected to the channel 15.

[0096] Specifically, it also includes: a guide sleeve 17, which is embedded in the cylinder cavity 11 and sleeved on the rod 12, and is adapted to provide guidance for the movement of the rod 12.

[0097] Combination Figures 1-5 As shown, a hydraulic inlet 16 is formed through the top of the cylinder head 14. An external threaded connector is provided at the hydraulic inlet 16. One end of the external threaded connector is connected to the hydraulic system via a hydraulic hose, and the other end is connected to the hydraulic inlet 16 for introducing hydraulic oil. The cylinder head 14 and cylinder liner 13 are fixed together with screws, and a rubber sealing ring is provided between the cylinder head 14 and cylinder liner 13 for static sealing of the end face to prevent hydraulic oil leakage. A piston 19 is fitted onto one end of the rod 12 near the hydraulic inlet 16. A wire retaining ring and an O-ring are sequentially provided at the fitting position of the piston 19 and the rod 12. The wire retaining ring is used for axial positioning of the piston 19, and the O-ring is used for static sealing between the piston 19 and the rod 12. The piston 19 has a contact surface with the cylinder liner 13 on its outer circumferential surface. A combined sealing ring is fitted on the upper part, which is used for dynamic sealing between the piston 19 and the cylinder liner 13. The cylinder liner 13 has at least two cylinder chambers 11. The inner wall of the cylinder chamber 11 away from the cylinder head 14 is provided with an installation groove for the installation and fixing of the guide sleeve 17. The guide sleeve 17 provides guidance for the extension and retraction of the rod 12, preventing the rod 12 from deviating and thus affecting the pressing quality of the bearing 8. The wall of the cylinder liner 13 located between the cylinder chambers 11 forms a channel 15, which connects the oil passages of the two cylinder chambers 11. The channel 15 is located on the side of the cylinder liner 13 near the cylinder head 14. The channel 15 is connected to the inlet 16, which is suitable for simultaneously introducing hydraulic oil into the two cylinder chambers 11, so that the two rods 12 move and change position synchronously.

[0098] Optionally, the external threaded connector can be made of stainless steel to improve the service life of the bearing press-fitting mechanism.

[0099] Optionally, the cylinder liner 13, cylinder head 14, piston 19 and rod 12 can all be made of hard aluminum alloy, which controls the overall weight to the greatest extent while meeting the required strength, and is more conducive to the suspension and storage operation of the bearing press-fitting mechanism.

[0100] Specifically, the top of the hydraulic cylinder 1 is provided with a lifting lug 18, which is suitable for suspending the bearing press-fitting mechanism with the help of a balancer.

[0101] Combination Figure 2 As shown, the lifting lug 18 is L-shaped and has through holes at both ends; the through hole at one end of the L-shaped lifting lug 18 is fixed to the cylinder head 14 by means of screws, and the other end is connected to the balancer, which is used to stabilize the suspension bearing press-fit mechanism; at least two lifting lugs 18 are provided on opposite sides of the hydraulic cylinder 1 to balance the suspension bearing press-fit mechanism.

[0102] Specifically, the sleeve 32 is detachably connected to the push plate 31;

[0103] The rod 12 is detachably connected to the push plate 31;

[0104] The hydraulic cylinder 1 is detachably connected to the support frame 2.

[0105] Combination Figure 1 As shown, the push plate 31 is provided with several screw holes 36, and the top of the sleeve 32 is provided with a threaded post for connection. The sleeve 32 and the push plate 31 are detachably connected together by the engagement of the threaded post and the threaded hole. The end of the rod 12 is provided with an external thread, and the rod 12 and the push plate 31 are detachably connected together by the engagement of the external thread and the threaded hole. Since the push plate 31 and the rod 12, and the push plate 31 and the sleeve 32 are all detachably connected, for shafts of different specifications, sizes and forms, the sleeve 32 or the push plate 31 that is compatible with it can be replaced to meet the pressing requirements.

[0106] Specifically, the top of the support frame 2 is provided with a through hole 23, and the rod 12 passes through the through hole 23 to connect with the push plate 31.

[0107] Combination Figure 6 As shown, the support frame 2 is a frame structure with a bottom opening formed by the connection of the top plate and the side plate. The top plate has a through hole 23, and the rod 12 passes through the through hole 23 and connects with the push plate 31 to prevent motion interference and improve the stability of press fitting.

[0108] Specifically, the end of the sleeve 32 extends outward to form a second flange 35, and the first flange 34 presses against the second flange 35.

[0109] Combination Figure 1 As shown, the end of the sleeve 32 extends outward to form a second flange 35, and the first flange 34 presses against the second flange 35, so that the first flange 34 is firmly pressed against the inner and outer rings of the bearing 8, so that the bearing 8 is subjected to balanced pressure.

[0110] A method for press-fitting a bearing 8, comprising:

[0111] Remove the suspended bearing pressing mechanism, align the positioning pin 21 and insert it into the hole of the flange 6 of the part to be pressed 9;

[0112] The wing plate 22 presses against the flange 6, and the buckle plate 51 is pushed outward by the flange 6, and then returns to its original position and fastens to the flange 6.

[0113] A bearing 8 is sleeved on the shaft of the part to be pressed 9;

[0114] The controller 4 controls the hydraulic cylinder 1 to start, and at least two sleeves 32 simultaneously push the bearing 8 downward into the target bearing seat 91;

[0115] The controller 4 controls the sleeve 32 to move back to its original position;

[0116] The controller 4 controls the sleeve 32 to press the bearing 8 into place again;

[0117] Pull the buckle plate 51 outward to disengage the bearing pressing mechanism from the part to be pressed 9, and use a balancer to return the bearing pressing mechanism to its original position and suspend it.

[0118] Combination Figures 1-3 As shown, before pressing the bearing 8, the operator pulls down the suspended bearing pressing mechanism, aligns the positioning pin 21 located at the bottom of the support frame 2 with and inserts it into the hole on the flange 6. Since at least two positioning pins 21 are respectively located on opposite sides of the support frame 2, the positioning work between the bearing pressing mechanism and the rotating mechanical body is completed during the insertion of the positioning pins 21. During the insertion of the positioning pins 21, the wing plate 22 of the support frame 2 gradually approaches the end face of the flange 6. Since the hook 54 of the buckle plate 51 is engaged below the wing plate 22, the flange 6 contacts and presses against the locking part 55 on the hook 54, causing the buckle plate 51 to shift outward until the wing plate 22 is completely pressed against the flange 6. Then, the elastic element 52 pulls the buckle plate 51 back to its original position, and the hook 54 is engaged below the flange 6, so that the support frame 2 and the flange 6 are locked together. After the bearing pressing mechanism is fixed, each sleeve 32 is aligned with the shaft. The bearing 8 to be pressed is then placed on the shaft, and then the controller is pressed. Automatic pressing button 41 on controller 4 causes all sleeves 32 to press down synchronously. A protective sleeve 33 is installed inside each sleeve 32. During pressing, the protective sleeve 33 contacts the outer wall of the shaft, protecting the shaft and guiding the movement of the sleeve 32. The first flange 34 on the protective sleeve 33, located at the end of the sleeve 32, presses against the bearing 8, and the first flange 34 contacts both the inner and outer rings of the bearing 8, ensuring balanced pressure on the inner and outer rings of the bearing 8. The first flange 34 pushes the bearing 8, causing it to move synchronously down into the target bearing seat 91. After confirming that the pressing is in place, the automatic return button 42 on controller 4 is pressed, and the sleeve 32 moves back up, completing the single pressing. Subsequently, the controller 4 can be used to perform a second pressing of the bearing 8 to ensure proper pressing. After the bearing 8 is pressed, the buckle plate 51 is pulled outwards, separating the bearing pressing mechanism from the rotating mechanical body. The bearing pressing mechanism automatically returns to the suspension position with the help of the balancer, completing the pressing work, saving time and effort.

[0119] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A bearing press-fitting mechanism, characterized in that, include: A hydraulic cylinder (1) has at least two cylinder chambers (11) and a rod (12) with one end disposed in the cylinder chamber (11), the hydraulic cylinder (1) being adapted to drive the rod (12) to extend outward or retract inward; At least two of the rods (12) move synchronously; The support frame (2) is adapted to be detachably fixed above the pressing part (9); the hydraulic cylinder (1) is fixed to the top of the support frame (2); The support frame (2) is provided with a positioning pin (21) at its bottom end. The positioning pin (21) is adapted to be positioned in conjunction with the hole on the flange (6) of the part to be pressed (9). The pressing device (3) has a push plate (31) and sleeves (32); the rod (12) is connected to the push plate (31), and at least two sleeves (32) are connected to the side of the push plate (31) away from the rod (12); the rod (12) drives at least two sleeves (32) to push the bearing (8) downward synchronously. The sleeve (32) is fitted with a protective sleeve (33), which is adapted to contact the outer periphery of the shaft (7) of the part to be pressed (9); the protective sleeve (33) extends outward from the end of the sleeve (32) to form a first flange (34), which is adapted to press against the inner and outer rings of the bearing (8); The controller (4) is electrically connected to the hydraulic cylinder (1) and is adapted to control the oil supply or return of the hydraulic cylinder (1); At least two elastic buckles (5) are provided on the support frame (2); The bottom end of the support frame (2) is provided with at least two wing plates (22), and the positioning pin (21) is provided on the wing plate (22); The support frame (2) is provided with ribs (24); The elastic buckle (5) includes a buckle plate (51) and an elastic element (52); The buckle (51) has a latch arm (53) and a latch hook (54) extending from one end of the latch arm (53) and bent into a hook shape. The other end of the arm (53) is hinged to the rib (24), and the hook (54) is fastened to the wing plate (22); One end of the elastic element (52) is hinged to the latch arm (53), and the other end is hinged to the rib plate (24) at a position below the latch arm (53), which is suitable for tightening the buckle plate (51) by means of elastic force. The end of the hook (54) is formed with a locking part (55). When the wing plate (22) abuts against the flange (6) on the part to be pressed (9), the locking part (55) is squeezed by the flange (6), and the buckle plate (51) moves outward. After the wing plate (22) fully abuts against the flange (6), the elastic element (52) pulls the buckle plate (51) back into place, and the hook (54) locks onto the flange (6).

2. The bearing press-fitting mechanism according to claim 1, characterized in that, The hydraulic cylinder (1) has a cylinder liner (13) and a cylinder head (14) closed on one side of the cylinder liner (13). At least two of the cylinder chambers (11) are located within the cylinder liner (13); The wall of the cylinder liner (13) located between the cylinder cavities (11) forms a channel (15) through which the cylinder cavities (11) are connected; The cylinder cover (14) is provided with a liquid inlet (16), which is connected to the channel (15).

3. The bearing press-fitting mechanism according to claim 2, characterized in that, Also includes: A guide sleeve (17) is embedded in the cylinder cavity (11) and sleeved on the rod body (12), and is adapted to provide guidance for the movement of the rod body (12).

4. The bearing press-fitting mechanism according to claim 1, characterized in that, The top of the hydraulic cylinder (1) is provided with a lifting lug (18), which is suitable for suspending the bearing press mechanism with the aid of a balancer.

5. The bearing press-fitting mechanism according to claim 1, characterized in that, The sleeve (32) is detachably connected to the push plate (31); The rod (12) is detachably connected to the push plate (31); The hydraulic cylinder (1) is detachably connected to the support frame (2).

6. The bearing press-fitting mechanism according to claim 1, characterized in that, The top of the support frame (2) is provided with a through hole (23), and the rod (12) passes through the through hole (23) and connects with the push plate (31).

7. The bearing press-fitting mechanism according to claim 1, characterized in that, The sleeve (32) extends outward to form a second flange (35), and the first flange (34) presses against the second flange (35).

8. A bearing press-fitting method, characterized in that, The bearing press-fitting mechanism according to any one of claims 1 to 7 further includes the following steps: Remove the suspended bearing press-fitting mechanism, align the positioning pin (21) with and insert it into the hole of the flange (6) of the part to be press-fitted (9); The wing plate (22) presses against the flange (6), and the buckle plate (51) is pushed outward by the flange (6) and then returns to its original position and fastens to the flange (6); A bearing (8) is fitted onto the shaft (7) of the part to be pressed (9); The controller (4) controls the hydraulic cylinder (1) to start, and at least two sleeves (32) simultaneously push the bearing (8) downward into the bearing seat (91) of the target; The controller (4) controls the sleeve (32) to move back to its original position; The controller (4) controls the sleeve (32) to press the bearing (8) again; Pull the buckle plate (51) outward to separate the bearing pressing mechanism from the part to be pressed (9), and use the balancer to return the bearing pressing mechanism to its original position and suspend it.

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