A press fitting mechanism for assembling a reducer bearing

Abstract

The utility model discloses a kind of pressing equipment mechanisms for gear reducer bearing assembly, including machine tool, workbench, movable platform, translation mechanism and split pressing sleeve;Machine tool is equipped with two columns, each column is equipped with pressing mechanism;Workbench is located on machine tool, and the length direction of workbench extends along perpendicular to column direction;Movable platform is slidably connected with workbench;Positioning assembly is equipped on movable platform;Translation mechanism is located on machine tool and between two columns, for driving movable platform translation;Split pressing sleeve is formed by two half shaft sleeves splicing, and its inner diameter and the outer diameter of transmission shaft are matched in splicing state, and the middle part of each half shaft sleeve is equipped with horizontally outwardly extending cross arm, and two pressing mechanisms are respectively applied on the cross arm of corresponding half shaft sleeve, to drive two half shaft sleeves to press down, so as to press the inner ring of bearing.The pressing equipment mechanism for gear reducer bearing assembly provided by the utility model realizes the bearing pressing of various specifications transmission shaft assembly, and the transmission shaft assembly is convenient to assemble and disassemble.

Description

Technical Field

[0001] This utility model relates to the technical field of speed reducer assembly equipment, and in particular to a press-fitting mechanism for assembling speed reducer bearings. Background Technology

[0002] During the assembly of the speed reducer, the bearings and gears must first be installed onto the drive shaft to form the drive shaft assembly, which is then installed onto the speed reducer body. Because the bearing inner ring and drive shaft have an interference fit to ensure reliable connection, traditionally, assembly is done manually. Operators use tools such as hammers, copper bars, and sockets to strike the bearing inner ring, forcibly installing the bearing through impact. This method is extremely labor-intensive, and the impact force is difficult to control precisely, easily causing bearing damage and potentially even damage to the drive shaft.

[0003] To overcome the drawbacks of manual assembly, the use of press-fitting machines for bearing press-fitting has become increasingly common. These machines provide stable and controllable downward pressure via hydraulic or pneumatic pressure to improve assembly efficiency and accuracy, and reduce the risk of component damage. However, in the assembly of large reducers, existing press-fitting machines struggle to meet the bearing press-fitting requirements, primarily due to a conflict between the structure of the drive shaft assembly and the equipment layout. Specifically, after the bearing at one end of the drive shaft is installed, a large gear needs to be assembled onto the shaft before pressing-fitting the bearing at the other end. Because large reducers use large gears, when the drive shaft assembly with the gear installed is placed in the press-fitting machine for subsequent bearing press-fitting, the large gear often interferes with the machine's structure (such as the frame, column, or fixed frame), preventing the drive shaft assembly from being smoothly placed into the effective working position of the press-fitting machine, ultimately making the press-fitting operation impossible. Therefore, in the existing technology, neither the inefficient and easily damaging manual assembly method nor the general press-fitting machine, which can provide stable pressure but is limited by the overall structure and cannot accommodate the drive shaft with large gears, can effectively meet the high-quality requirements of large reducer bearing assembly.

[0004] It is evident that existing technologies still need improvement and enhancement. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a press-fitting mechanism for assembling gear reducer bearings, which aims to solve the technical problem in the prior art that the transmission shaft assembly cannot be placed in the working area for bearing press-fitting due to spatial position interference between the gear and the equipment.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A press-fitting mechanism for assembling gearbox bearings, comprising:

[0008] The machine tool has two columns, each with a pressing mechanism.

[0009] The worktable is located on the machine tool and below the pressing mechanism. The length of the worktable extends perpendicular to the column.

[0010] The movable table is slidably connected to the worktable; the movable table is equipped with a positioning component to lock the position of the drive shaft.

[0011] The translation mechanism is located on the machine tool and between two columns, and is used to drive the movable table to translate along the length of the worktable;

[0012] The split press-fit sleeve is composed of two half-shaft sleeves spliced ​​together. In the spliced ​​state, its inner diameter matches the outer diameter of the drive shaft. Each half-shaft sleeve has a horizontally extending cross arm in the middle. Two pressing mechanisms act on the cross arm of the corresponding half-shaft sleeve to drive the two half-shaft sleeves to press down, thereby pressing the bearing inner ring.

[0013] Furthermore, the bottom of the movable platform is provided with several rollers, and the worktable is provided with several parallel guide grooves; the rollers are placed in the corresponding guide grooves and form a sliding connection with the guide grooves.

[0014] Furthermore, the translation mechanism includes a drive cylinder mounted on the machine tool, a guide rod slidably connected to the machine tool, and a connecting seat located at the end of the extension rod of the drive cylinder, with the end of the guide rod fixedly connected to the connecting seat; the movable table is mounted on the connecting seat.

[0015] Furthermore, the movable platform is provided with three sets of grooves, each set of grooves including four circumferentially distributed adjustment grooves, the cross-section of the adjustment grooves being an inverted T-shaped structure; the positioning component includes four positioning blocks with an L-shaped structure, each positioning block being slidably connected to the corresponding adjustment groove through a slider.

[0016] Furthermore, the three sets of grooves are not on the same straight line; and the angle between the length direction of each adjustment groove and the moving direction of the movable platform is 45°.

[0017] Furthermore, each side of the half-shaft sleeve is provided with a connecting lug, and the corresponding connecting lugs on the two half-shaft sleeves are connected in a detachable manner by fasteners.

[0018] Furthermore, a reinforcing rib is provided between the cross arm and the outer wall of the half-shaft sleeve.

[0019] Furthermore, the pressing mechanism includes a lifting device mounted on the column and a pressing head mounted at the output end of the lifting device, the pressing head acting on the split pressing sleeve.

[0020] Beneficial effects:

[0021] This utility model provides a press-fitting mechanism for assembling gear reducer bearings, which has the following advantages: (1) It is equipped with a double pressing mechanism, and there is a large open space between the double pressing mechanisms that is not occupied by the equipment structure. This open space is suitable for placing a transmission shaft assembly with a large gear and a risk of spatial interference. Combined with the split press-fitting sleeve, the bearing press-fitting of the transmission shaft assembly can be realized; (2) By setting a translation mechanism to drive the movable table to translate between the press-fitting station and the non-working area, the loading and unloading of the transmission shaft can be simplified, providing a larger operating space and convenience. Attached Figure Description

[0022] Figure 1 This utility model provides a structural diagram of the press-fitting mechanism for assembling gearbox bearings.

[0023] Figure 2 A partial exploded view of the press-fitting mechanism for assembling the gearbox bearings provided by this utility model;

[0024] Figure 3 A cross-sectional view of the adjusting groove in the press-fitting mechanism for assembling the gearbox bearing provided by this utility model;

[0025] Figure 4 A structural diagram of the split-type press-fitting sleeve in the press-fitting mechanism for assembling gearbox bearings provided by this utility model;

[0026] Figure 5 A schematic diagram of the pressing process of the press-fitting mechanism for assembling gearbox bearings provided by this utility model;

[0027] Figure 6 For drive shaft assembly.

[0028] Reference numerals: Machine tool 1, column 11, pressing mechanism 2, lifting device 21, pressure head 22, pressure sensor 23, worktable 3, guide groove 31, stop bar 32, movable table 4, roller 41, groove group 42, adjusting groove 421, positioning assembly 5, positioning block 51, boss 511, slider 52, translation mechanism 6, drive cylinder 61, guide rod 62, connecting seat 63, split press-fit sleeve 7, half shaft sleeve 71, cross arm 72, connecting ear 73, reinforcing rib 74;

[0029] Drive shaft a1, bearing a2, gear a3. Detailed Implementation

[0030] This utility model provides a press-fitting mechanism for assembling gearbox bearings. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0031] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this utility model. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0032] In this utility model, such as Figure 6 As shown, the drive shaft assembly includes a drive shaft a1, a bearing a2 located at the end of the drive shaft, and a gear a3 sleeved on the drive shaft a1 and located between two sets of bearings a2. During assembly, one bearing a2 needs to be pressed onto the drive shaft a1 first, then the drive shaft a1 is reversed and the gear a3 is installed, and finally the other bearing a3 is pressed onto it.

[0033] Please see Figures 1 to 5 As shown, this utility model provides a press-fitting mechanism for assembling reducer bearings, including a machine tool 1, a worktable 3, a movable table 4, a translation mechanism 6, and a split press-fitting sleeve 7. The machine tool 1 is provided with two columns 11, each column 11 is provided with a pressing mechanism 2. The worktable 3 is provided on the machine tool 1 and is located below the pressing mechanism 2. The length direction of the worktable 3 extends perpendicular to the column 11. The movable table 4 is slidably connected to the worktable 3. The movable table 4 is provided with a positioning component 5 for locking the position of the drive shaft. The translation mechanism 6 is provided on the machine tool 1 and is located between the two columns 11 for driving the movable table 4 to translate along the length direction of the worktable 3. The split press-fitting sleeve 7 is composed of two half-shaft sleeves 71 spliced ​​together. In the spliced ​​state, its inner diameter matches the outer diameter of the drive shaft. Each half-shaft sleeve 71 is provided with a horizontally extending cross arm 72 in the middle. The two pressing mechanisms 2 act on the cross arm 72 of the corresponding half-shaft sleeve 71 to drive the two half-shaft sleeves 71 to press down, thereby pressing the inner ring of the bearing.

[0034] Before the pressing operation begins, the translation mechanism 6 moves the movable table 4 away from the column 11, providing ample operating space for the operator to hoist and place the drive shaft onto the movable table 4, especially for drive shaft assemblies already equipped with large gears. The positioning components 5 on the movable table securely lock the drive shaft in place. After the drive shaft is positioned, the translation mechanism 6 drives the movable table 4 back to the pressing position directly below the two pressing mechanisms 2. During pressing, the operator places the bearing onto the predetermined installation position on the drive shaft from top to bottom, and then selects a matching split-type pressing sleeve 7. The two half-shaft sleeves 71 of this pressing sleeve are assembled from both sides of the drive shaft, ensuring that the inner diameter after splicing matches the outer diameter of the drive shaft, and that the bottom end of the half-shaft sleeve 71 contacts the upper surface of the inner ring of the bearing to be pressed. At this time, the cross arms 72 on the two half-shaft sleeves 71 are positioned directly below the corresponding pressing mechanisms 2. After the pressing mechanism 2 is activated, its output end applies pressure downward to the horizontal arm 72. This pressure is transmitted to the half-shaft sleeve 71 through the horizontal arm 72, and finally the half-shaft sleeve 71 acts evenly on the entire circumference of the bearing inner ring, thereby achieving stable and precise pressing of the bearing inner ring into place.

[0035] There is a large open space between the two columns 11 that is not occupied by the equipment structure. When the drive shaft assembly with a large gear is moved to the pressing station, this space can fully accommodate the large gear, effectively avoiding spatial interference between the gear and the column 11. This allows the pressing mechanism to adapt to drive shaft assemblies of various structures and specifications, making it widely applicable. Furthermore, the movable table 4 has a translation function between the pressing station and the non-working area, simplifying workpiece loading and unloading operations and providing greater operating space and convenience.

[0036] In a preferred embodiment, see [reference] Figure 1 , 2 The movable platform 4 has several rollers 41 at its bottom, and the worktable 3 has several parallel guide grooves 31. The rollers 41 are placed in the corresponding guide grooves 31 and form a sliding connection with the guide grooves 31. Preferably, four rows of rollers 41 are provided, with three rollers 41 in each row. Each row of rollers 41 runs independently in one guide groove 31. The structure of multiple rows of rollers 41 and multiple guide grooves 31 improves the overall installation stability of the movable platform 4 in both moving and stationary states, and also improves the load-bearing capacity of the movable platform 4.

[0037] Preferably, see Figure 1 , 2Each guide groove 31 has a baffle 32 on both sides. The cross section of the baffle 32 is in the shape of a "7". The two baffles 32 work together with the guide groove 31 to form a restricted area on both sides, which together encloses the movement area of ​​the roller 41, effectively preventing the movable table 4 from tipping over when moving or carrying load, and preventing the roller 41 from coming out of the guide groove 31.

[0038] In a preferred embodiment, see [reference] Figure 2 The translation mechanism 6 includes a drive cylinder 61 mounted on the machine tool 1, a guide rod 62 slidably connected to the machine tool 1, and a connecting seat 63 located at the end of the extension rod of the drive cylinder 61. The end of the guide rod 62 is fixedly connected to the connecting seat 63. A movable table 4 is mounted on the connecting seat 63. The drive cylinder 61 drives the connecting seat 63 to reciprocate and translate through the extension or retraction of its extension rod. During this process, the guide rod 62 serves as a guide and limiter, ensuring that the connecting seat 63 and the movable table 4 on it translate stably and accurately along the direction of the guide groove 31.

[0039] In a preferred embodiment, see [reference] Figure 1 , 2 3. The movable platform 4 is provided with three sets of slots 42, each set of slots 42 including four circumferentially distributed adjustment slots 421, the cross-section of which is an inverted T-shape. The positioning component 5 includes four L-shaped positioning blocks 51, each positioning block 51 being slidably connected to its corresponding adjustment slot 421 via a slider 52. These four positioning blocks 51 together form a positioning area for placing the lower end of the drive shaft, effectively locking the position of the drive shaft. Furthermore, by adjusting the position of each slider 52 in its corresponding adjustment slot 421, the size of the area enclosed by the four positioning blocks 51 can be changed to accommodate and place drive shafts of different sizes and specifications. In practical applications, the four positioning blocks 51 can also be used to lock the position of components near the bottom of the drive shaft.

[0040] Preferably, the surface of the positioning block 51 facing the drive shaft is provided with a rubber pad to increase the friction between the two and improve the stability of the drive shaft placement.

[0041] Preferably, see Figure 3The positioning block 51 has a boss 511 at its bottom. The boss 511 is embedded in the adjustment groove 421 and forms a sliding fit with the adjustment groove 421, strictly limiting the positioning block 51 to move only along the length of the adjustment groove 421, thereby effectively preventing the positioning block 51 from rotating axially during operation. The width of the slider 52 is smaller than the opening width of the adjustment groove 421, and the length of the slider 52 is smaller than the width of the internal cavity of the adjustment groove 421, but larger than the opening width of the adjustment groove 421. During installation, the slider 52 is aligned with the opening of the adjustment groove 421 and inserted into its internal cavity, and then the slider 52 is rotated 90°. At this time, since the length of the slider 52 is greater than the opening width, the slider 52 will be locked in the internal cavity of the adjustment groove 421 after rotation and will not come out. The positioning block 51 and the slider 52 can move along the adjustment groove 421. Finally, the screw on the slider 52 passes through the positioning block 51 and the nut is tightened to secure the positioning block 51 to the current adjustment position on the adjustment groove 421. The above settings simplify the assembly and disassembly process of the positioning block 51, making it easier to quickly adjust or replace the positioning block 51 according to the specifications of the workpiece.

[0042] When the bearing to be press-fitted is located at a high point on the drive shaft, and the diameter of the support section at the lower end of the drive shaft is relatively small, to improve the placement stability of the drive shaft during the press-fitting process, the four L-shaped positioning blocks 51 can be replaced with a sleeve of a customized height. This sleeve is fixed to the adjustment groove 421 of the movable table 4 by fasteners. During the press-fitting operation, the lower end of the drive shaft is inserted into the sleeve. The sleeve's inner wall fully encloses and guides the smaller shaft diameter, thereby enhancing the positioning stability of the drive shaft. The fasteners mentioned above can be bolts or nuts.

[0043] The three sets of slots 42 and their corresponding positioning components 5 are respectively set on three specific pressing stations: two stations are located directly below the two pressing mechanisms 2; and one station is located directly below the area between the two pressing mechanisms 2. For drive shaft assemblies without large gears or with small gear sizes and no risk of interference, they can be placed on the two pressing stations for bearing pressing; for drive shaft assemblies with large gears and a risk of spatial interference, they are placed on the middle pressing station for bearing pressing. This middle station utilizes the open space between the columns 11, which can effectively accommodate large gears and avoid interference with the pressing mechanism. Through the above arrangement, it is possible to flexibly adapt to the pressing needs of various drive shaft assemblies, and in particular, it effectively solves the problem that large gear workpieces cannot be operated on traditional pressing machines due to spatial interference, thus broadening its applicability.

[0044] Furthermore, the three sets of grooves 42 are not on the same straight line; and the angle between the length direction of each adjusting groove 421 and the moving direction of the movable platform 4 is 45°. Through the above arrangement, the groove positions on the movable platform 4 are effectively dispersed, avoiding the risk of structural weakening caused by multiple sets of grooves being concentrated in a local area or direction, thereby ensuring the overall structural strength and rigidity of the movable platform 4.

[0045] In a preferred embodiment, see [reference] Figure 4 Each half-shaft sleeve 71 has connecting ears 73 on both sides. The corresponding connecting ears 73 on the two half-shaft sleeves 71 are detachably connected by fasteners. The fasteners are bolts and nuts. The bolts are fixed on the connecting ears 73 of one half-shaft sleeve 71, and the connecting ears 73 of the other half-shaft sleeve 71 have through holes. During assembly, the two half-shaft sleeves 71 are arranged around the drive shaft, the bolts are inserted into the through holes, and finally the nuts are tightened to complete the fastening connection of the two half-shaft sleeves 71.

[0046] Preferably, the height of the connecting lug 73 is lower than the height of the half-shaft sleeve 71, and the two ends of the connection do not extend to the end face of the half-shaft sleeve 71. With this configuration, during the press-fitting operation, it is ensured that only the bottom end face of the half-shaft sleeve 71 can directly and reliably abut against and press against the upper surface of the bearing inner ring. Because the connecting lug 73 is lower overall and does not touch the end face, the risk of it possibly touching or even interfering with other parts of the bearing (such as the outer ring, cage, or seal) is completely avoided, thus ensuring the accurate transmission of the press-fitting force and protecting the bearing from unnecessary damage.

[0047] In a preferred embodiment, see [reference] Figure 4 A reinforcing rib 74 is provided between the outer wall of the cross arm 72 and the half-shaft sleeve 71. By providing the reinforcing rib 74, the structural rigidity of the split press-fit sleeve 7 is enhanced, effectively ensuring that the press-fitting force is uniformly and efficiently transmitted to the inner ring of the bearing along the predetermined path, and greatly improving the press-fitting accuracy, structural load-bearing capacity, durability and operational reliability.

[0048] In a preferred embodiment, see [reference] Figure 1 , 5The pressing mechanism 2 includes a lifting device 21 mounted on the column 11 and a pressing head 22 located at the output end of the lifting device 21. The pressing head 22 acts on the split pressing sleeve 7. Specifically, a pressure sensor 23 is provided between the pressing head 22 and the lifting device 21. The pressure sensor 23 is electrically connected to the controller of the pressing mechanism. During the pressing of the bearing, the downward pressure is transmitted to the cross arm 72 and the half-shaft sleeve 71 through the pressing head 22 and the pressure sensor 23, and finally acts on the inner ring of the bearing. The pressure sensor 23 detects and feeds back the currently applied pressing force value to the controller in real time. The controller compares the detected real-time pressing force value with the preset target pressing force value. When the detected force value reaches the preset value, the controller determines that the bearing has been pressed into place and issues a command to stop the pressing action of the lifting device 21. Through the above settings, the downward pressure applied by the lifting device 21 is effectively prevented from exceeding the preset value. Excessive compression can not only deform and damage the inner ring of the bearing, but more importantly, the huge overload force is likely to be transmitted to the drive shaft, causing plastic deformation in the stress area of ​​the drive shaft, which seriously affects the structural integrity and strength of the drive shaft.

[0049] It should be noted that the controller falls within the scope of existing mature technology. In the field of industrial automation equipment, especially in equipment involving processes such as pressing, stamping, and assembly, using controllers such as PLC programmable logic controllers, motion controllers, or industrial computers as core control units is a common configuration and practice in this field. In the specific application of this pressing mechanism, the controller is electrically connected to components such as the lifting device 21, pressure sensor 23, and translation mechanism 6 via a standard electrical interface. When pressing the bearing, the controller receives the real-time pressure signal transmitted by the pressure sensor 23 and compares this signal with the preset target pressing force value in its memory. Once the real-time pressure value is detected to reach or exceed the preset value, the controller issues a command to stop the pressing action of the lifting device 21. This control logic is a mature and well-known technology in the field of automation control.

[0050] The pressure sensor mentioned above can be a strain gauge pressure sensor, specifically an HBM U9C series force sensor.

[0051] In the above description, the lifting device 21 can be a servo electric cylinder, which is existing technology and has a self-guiding function, enabling it to drive the pressure head 22 to perform only lifting movements. The specific structure and working principle of the servo electric cylinder will not be elaborated further. In an alternative solution, the lifting device 21 can also be driven by a hydraulic cylinder or a pneumatic cylinder.

[0052] In summary, this utility model simplifies the loading and unloading of the transmission shaft by setting two columns 11 on the machine tool 1, each column 11 being equipped with a pressing mechanism 2; the translation mechanism 6 drives the movable table 4 to translate along the length of the worktable 3, allowing the movable table 4 to reciprocate between the pressing station and the non-working area. The movable table 4 is equipped with three sets of slots 42, which, combined with the two pressing mechanisms 2, can form three pressing stations in specific positions. Two pressing stations are located directly below the pressing mechanisms 2, suitable for pressing bearings in transmission shaft assemblies without positional interference risks; one pressing station is located directly below the middle of the two pressing mechanisms 2, and combined with the split pressing sleeve 7, suitable for pressing bearings in transmission shaft assemblies with large gears and spatial interference risks. During press fitting, the four adjustable positioning blocks 51 on the slot assembly 42 can lock the drive shafts of various sizes and specifications; the translation mechanism 6 drives the movable table 4 to translate to the press fitting station, and the lifting device 21 drives the press head 22 to descend so that the pressure is transmitted to the inner ring of the bearing through the split press fitting sleeve 7. The pressure sensor 23 monitors the press fitting force value in real time, and automatically stops when the preset threshold is reached, ensuring accurate bearing press fitting depth and eliminating the risk of overpressure.

[0053] It is understood that those skilled in the art can make equivalent substitutions or modifications based on the technical solution and inventive concept of this utility model, and all such substitutions or modifications should fall within the protection scope of the appended claims of this utility model.

Claims

1. A press-fitting mechanism for assembling gearbox bearings, characterized in that, include: The machine tool (1) is provided with two columns (11), and each column (11) is provided with a pressing mechanism (2); The worktable (3) is located on the machine tool (1) and below the pressing mechanism (2). The length of the worktable (3) extends in a direction perpendicular to the column (11). The movable table (4) is slidably connected to the worktable (3); the movable table (4) is provided with a positioning component (5) for locking the position of the drive shaft; Translation mechanism (6) is provided on the machine tool (1) and located between two columns (11) for driving the movable table (4) to translate along the length of the worktable (3); The split press-fit sleeve (7) is composed of two half-shaft sleeves (71) spliced ​​together. In the spliced ​​state, its inner diameter matches the outer diameter of the drive shaft. Each half-shaft sleeve (71) has a horizontally extending cross arm (72) in the middle. Two pressing mechanisms (2) act on the cross arm (72) of the corresponding half-shaft sleeve (71) to drive the two half-shaft sleeves (71) to press down, thereby pressing the inner ring of the bearing.

2. The press-fitting mechanism for assembling reducer bearings according to claim 1, characterized in that, The bottom of the movable platform (4) is provided with several rollers (41), and the worktable (3) is provided with several parallel guide grooves (31); the rollers (41) are placed in the corresponding guide grooves (31) and form a sliding connection with the guide grooves (31).

3. The press-fitting mechanism for assembling gearbox bearings according to claim 1, characterized in that, The translation mechanism (6) includes a drive cylinder (61) mounted on the machine tool (1), a guide rod (62) slidably connected to the machine tool (1), and a connecting seat (63) located at the end of the extension rod of the drive cylinder (61). The end of the guide rod (62) is fixedly connected to the connecting seat (63). The movable table (4) is mounted on the connecting seat (63).

4. The press-fitting mechanism for assembling reducer bearings according to claim 1, characterized in that, The movable platform (4) is provided with three sets of grooves (42), each set of grooves (42) includes four circumferentially distributed adjustment grooves (421), the cross section of the adjustment grooves (421) is an inverted T-shaped structure; the positioning component (5) includes four positioning blocks (51) with an L-shaped structure, each positioning block (51) is slidably connected to the corresponding adjustment groove (421) through a slider (52).

5. The press-fitting mechanism for assembling gearbox bearings according to claim 4, characterized in that, The three sets of grooves (42) are not on the same straight line; and the angle between the length direction of each adjustment groove (421) and the moving direction of the movable table (4) is 45°.

6. The press-fitting mechanism for assembling gearbox bearings according to claim 1, characterized in that, The two sides of the half-shaft sleeve (71) are respectively provided with connecting ears (73), and the corresponding connecting ears (73) on the two half-shaft sleeves (71) are connected by fasteners to form a detachable connection.

7. The press-fitting mechanism for assembling gearbox bearings according to claim 1, characterized in that, A reinforcing rib (74) is provided between the cross arm (72) and the outer wall of the half bushing (71).

8. The press-fitting mechanism for assembling reducer bearings according to claim 1, characterized in that, The pressing mechanism (2) includes a lifting device (21) on the column (11) and a pressing head (22) at the output end of the lifting device (21), the pressing head (22) acting on the split pressing sleeve (7).

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