A column-type press for press-fitting a shaft bearing

Abstract

The present application relates to the technical fields of universal joint bearing press mounting, in particular to a column type press mounting shaft bearing press machine, which comprises a frame body, an upper bottom plate and a lower bottom plate mounted on the frame body, a shaft and bearing seat press mounting mechanism and an oil seal shaft sleeve press mounting mechanism mounted between the upper bottom plate and the lower bottom plate, the upper bottom plate and the lower bottom plate are fixedly connected through a column, the shaft and bearing seat press mounting mechanism and the oil seal shaft sleeve press mounting mechanism are arranged side by side on the frame body, the shaft and bearing seat press mounting mechanism comprises a press seat assembly one, a press head one, a force cylinder one, a pressure sensor one and a displacement sensor one, the oil seal shaft sleeve press mounting mechanism comprises a press seat assembly two, a press head two, a force cylinder two, a pressure sensor two and a displacement sensor two, the present application can perform shaft press mounting installation, and can detect the press mounting displacement and press mounting pressure in the bearing installation process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of universal joint bearing press mounting, in particular to a column type press mounting shaft bearing press. BACKGROUND

[0002] In the process of assembling the axially movable ball cage type universal joint, the bearing part is processed and installed by press mounting, and the existing technology cannot effectively monitor the pulling pressure and displacement of the press during the installation process, so that it is impossible to determine whether the bearing is press mounted qualified. SUMMARY

[0003] The purpose of the present application is to provide a column type press mounting shaft bearing press to solve the problem that the press mounting process needs to be press mounted multiple times, the assembly efficiency is low, and it is impossible to effectively monitor and determine whether the press mounting is qualified.

[0004] To achieve the above purpose, the present application provides the following technical scheme: a column type press mounting shaft bearing press, comprising a frame body, an upper bottom plate and a lower bottom plate mounted on the frame body, a shaft and bearing seat press mounting mechanism and an oil seal shaft sleeve press mounting mechanism mounted between the upper bottom plate and the lower bottom plate, the frame body comprises an upper gantry and a lower gantry, the upper gantry is installed above the lower gantry, the lower bottom plate is installed above the lower gantry, and the upper gantry is arranged towards the lower bottom plate, the upper bottom plate is installed directly above the lower bottom plate, a column is arranged between the upper bottom plate and the lower bottom plate, and the upper bottom plate and the lower bottom plate are fixedly connected through the column, the shaft and bearing seat press mounting mechanism and the oil seal shaft sleeve press mounting mechanism are arranged side by side on the frame body,

[0005] The shaft and bearing seat press mounting mechanism comprises a press seat assembly one, a press head one, a force amplifier one, a pressure sensor one and a displacement sensor one, the press seat assembly one is installed on the lower bottom plate, the force amplifier one is installed on the upper bottom plate, and the piston rod of the force amplifier one is arranged on the lower side of the upper bottom plate towards the press seat assembly one, the press head one is installed on the piston rod of the force amplifier one, and the press head one is arranged in cooperation with the press seat assembly one, the displacement sensor one is installed on the upper gantry, and the extension displacement of the piston rod of the force amplifier one is detected through the sensor one, the pressure sensor is installed between the piston rod of the force amplifier one and the press head one, and the pressure applied by the force amplifier one to the press head one is detected through the pressure sensor,

[0006] The oil seal bush press-fitting mechanism comprises a second pressure seat assembly, a second pressure head, a second force amplifier, a second pressure sensor and a second displacement sensor, the second pressure seat assembly is installed on the lower base plate, the second force amplifier is installed on the upper base plate, the piston rod of the second force amplifier is located on the lower side of the upper base plate and faces the second pressure seat assembly, the second pressure head is installed on the piston rod of the second force amplifier, the second pressure head is arranged in cooperation with the second pressure seat assembly, the second displacement sensor is installed on the upper stand, the extension and retraction displacement of the piston rod of the second force amplifier is detected by the second sensor, the pressure sensor is installed between the piston rod of the second force amplifier and the second pressure head, and the pressure applied by the second force amplifier to the second pressure head is detected by the pressure sensor.

[0007] Preferably, the first pressure seat assembly comprises a pressure seat and a moving mechanism, the pressure seat is a vertical cylinder, a through groove is formed in the side wall of the vertical cylinder, the vertical cylinder is vertically installed on the lower base plate, a fixed plate is arranged on one side of the upper end of the vertical cylinder, the moving mechanism is arranged on the fixed plate, a shaft rod is arranged in the vertical cylinder through the through groove, a bearing seat matched with the shaft rod is located at the top end of the vertical cylinder, and the bearing seat is in contact with the moving mechanism.

[0008] Preferably, the moving mechanism comprises a U-shaped clamping block and a reciprocating push cylinder, the reciprocating push cylinder is installed on the fixed plate, the U-shaped clamping block is installed on the piston rod of the reciprocating push cylinder, and the opening of the U-shaped clamping block faces upward, when the bearing seat is located at the top end of the vertical cylinder, the component mechanism of the bearing seat is arranged in the U-shaped clamping block, the U-shaped clamping block is driven by the reciprocating push cylinder to move forward and backward, so that the bearing seat can move during the pressing process.

[0009] Preferably, the second pressure seat assembly comprises a mounting seat, a sliding plate, a push cylinder, four telescopic cylinders, a sleeve and a fixed seat, the mounting seat is arranged on the lower base plate, the sliding plate is slidingly installed on the upper side surface of the mounting seat, the push cylinder is installed on the mounting seat, the piston rod of the push cylinder is connected with the sliding plate, the sliding plate can slide forward and backward on the mounting seat by the push cylinder, the four telescopic cylinders are vertically arranged on the mounting seat, the four telescopic cylinders are arranged on the two sides of the sliding plate in two rows respectively, the fixed seat is installed on the upper piston rods of the four telescopic cylinders, the sleeve is vertically installed on the mounting seat, the sleeve is provided with a vertical groove communicating with the inside of the sleeve, the shaft rod arranged on the sliding plate can be arranged in the sleeve by sliding backward on the sliding plate.

[0010] Preferably, the lower end of the sleeve is made of plastic.

[0011] Preferably, six columns are arranged between the upper base plate and the lower base plate, and the six columns are arranged in two rows on the left, middle and right respectively, and the corresponding two columns in each row are located on the front and rear sides of the upper base plate and the lower base plate.

[0012] Preferably, the shaft rod and bearing seat press fitting mechanism is installed between the left and middle rows of columns, and the oil seal shaft sleeve press fitting mechanism is installed between the middle and right rows of columns.

[0013] Preferably, the position adjusting device is arranged between the lower bottom plate and the first and second press seat assemblies, and the position adjusting device comprises a positioning block and an adjusting bolt.

[0014] Preferably, the shaft rod and bearing seat press fitting mechanism further comprises a fixed plate one and a guide column one, the piston rod of the booster cylinder one is fixedly connected to the center of the fixed plate one, the guide column one is provided with two, the two guide columns one are vertically arranged on the upper side surface of the fixed plate one, the upper bottom plate is provided with a through hole one corresponding to the two guide columns one, the two guide columns one are slidingly installed in the corresponding through hole one, and the press head one is installed at the lower center of the fixed plate one.

[0015] Preferably, the oil seal shaft sleeve press fitting mechanism further comprises a fixed plate two and a guide column two, the piston rod of the booster cylinder two is fixedly connected to the center of the fixed plate two, the guide column two is provided with two, the two guide columns two are vertically arranged on the upper side surface of the fixed plate two, the upper bottom plate is provided with a through hole two corresponding to the two guide columns two, the two guide columns two are slidingly installed in the corresponding through hole two, and the press head two is installed at the lower center of the fixed plate two.

[0016] Compared with the prior art, the beneficial effects of the present application are that the shaft rod and bearing seat press fitting mechanism can perform the press fitting process of the shaft rod and the bearing seat and the shaft rod and the snap spring, the displacement sensor can detect the press fitting displacement amount of the shaft rod, the bearing and the snap spring during the installation process, the press fitting process equipment collects the tension and pressure and the displacement sensor signals and processes the force-displacement curve, and the output signal is compared with the set value to determine whether the press fitting is qualified, the detection efficiency of the bearing press fitting is improved, and the qualified rate of product output is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the present application;

[0018] Figure 2 is a partial enlarged structural schematic diagram of the shaft rod and bearing seat press fitting mechanism of the present application;

[0019] Figure 3 is a partial enlarged structural schematic diagram of the oil seal shaft sleeve press fitting mechanism of the present application;

[0020] Figure 4 is Figure 2 a side structural schematic diagram of the movable mechanism part;

[0021] Figure 5 isFigure 3 The schematic view of the side structure of the sliding plate.

[0022] In the figure: 1, upper rack; 2, lower rack; 3, upper bottom plate; 4, lower bottom plate; 5, stand column; 6, pressing seat; 7, fixed plate; 8, U-shaped clamping block; 9, reciprocating push cylinder; 10, pressing head one; 11, booster cylinder one; 12, pressure sensor one; 13, displacement sensor one; 14, mounting seat; 15, sliding plate; 16, push cylinder; 17, telescopic cylinder; 18, sleeve; 19, fixed seat; 20, pressing head two; 21, booster cylinder two; 22, pressure sensor two; 23, displacement sensor two; 24, positioning block; 25, adjusting bolt; 26, fixed plate one; 27, guide column one; 28, fixed plate two; 29, guide column two. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0024] Please refer to Figures 1 to 3 The present application provides a technical solution: a stand column type shaft and bearing press machine, which comprises a frame body, an upper bottom plate 3 and a lower bottom plate 4 installed on the frame body, a shaft and bearing seat press fitting mechanism and an oil seal shaft sleeve press fitting mechanism installed between the upper bottom plate 3 and the lower bottom plate 4, the frame body comprises an upper rack 1 and a lower rack 2, the upper rack 1 is installed above the lower rack 2, the lower bottom plate 4 is installed above the lower rack 2, and the upper rack 1 is arranged towards the lower bottom plate 4, the upper bottom plate 3 is installed directly above the lower bottom plate 4, a stand column 5 is arranged between the upper bottom plate 3 and the lower bottom plate 4, and the upper bottom plate 3 and the lower bottom plate 4 are fixedly connected through the stand column 5, the shaft and bearing seat press fitting mechanism and the oil seal shaft sleeve press fitting mechanism are arranged side by side on the frame body,

[0025] As Figure 2As shown, the shaft and bearing housing press-fitting mechanism includes a press base assembly, a press head 10, a booster cylinder 11, a pressure sensor 12, and a displacement sensor 13. The press base assembly is mounted on the lower base plate 4, the booster cylinder 11 is mounted on the upper base plate 3, and the piston rod of the booster cylinder 11 is located on the lower side of the upper base plate 3 facing the press base assembly. The press head 10 is mounted on the piston rod of the booster cylinder 11, and the press head 10 is configured to cooperate with the press base assembly. The displacement sensor 13 is mounted on the upper frame 1 and detects the amount of extension and retraction displacement of the piston rod of the booster cylinder 11. The pressure sensor is installed between the piston rod of the booster cylinder 11 and the press head 10 and detects the pressure applied by the booster cylinder 11 to the press head 10.

[0026] like Figure 3 As shown, the oil seal bushing press-fitting mechanism includes a second press base assembly, a second press head 20, a second booster cylinder 21, a second pressure sensor 22, and a second displacement sensor 23. The second press base assembly is mounted on the lower base plate 4, the second booster cylinder 21 is mounted on the upper base plate 3, and the piston rod of the second booster cylinder 21 is located on the lower side of the upper base plate 3 facing the second press base assembly. The second press head 20 is mounted on the piston rod of the second booster cylinder 21 and is configured to cooperate with the second press base assembly. The second displacement sensor 23 is mounted on the upper frame 1 and detects the amount of extension and retraction displacement of the piston rod of the second booster cylinder 21 by means of the second sensor. The pressure sensor is installed between the piston rod of the second booster cylinder 21 and the second press head 20 and detects the pressure applied by the second booster cylinder 21 to the second press head 20 by means of the pressure sensor.

[0027] The pressure seat assembly includes a pressure seat 6 and a movable mechanism. The pressure seat 6 is a vertical cylinder with a through groove on its side wall. The vertical cylinder is vertically mounted on the bottom plate 4. A fixed plate 7 is provided on one side of the upper end of the vertical cylinder. The movable mechanism is mounted on the fixed plate 7. The shaft is placed inside the vertical cylinder through the through groove. The bearing seat that cooperates with the shaft is located at the top of the vertical cylinder, and the bearing seat is in contact with the movable mechanism. The through groove is located at the front side of the vertical cylinder. The shaft can be placed inside the vertical cylinder through the through groove, avoiding the large operation steps of placing the shaft from the top of the vertical cylinder into the vertical cylinder.

[0028] The pressing process is as follows:

[0029] 1. The bearing is installed into the support;

[0030] 2. The inner oil seal is pressed into the support;

[0031] 3. The shaft is inserted into the bearing bore, and the retaining ring is inserted manually;

[0032] 4. The outer oil seal is pressed into the bearing support;

[0033] 5. Install the retaining ring onto the bushing;

[0034] 6, the shaft sleeve is pressed into the shaft rod.

[0035] As shown in Figure 4 , the movable mechanism includes a U-shaped clamping block 8 and a reciprocating push cylinder 9, the reciprocating push cylinder 9 is installed on the fixed plate 7, the U-shaped clamping block 8 is installed on the piston rod of the reciprocating push cylinder 9, and the opening of the U-shaped clamping block 8 is arranged upward, when the bearing seat is located at the top of the vertical cylinder, the component mechanism of the bearing seat is arranged in the U-shaped clamping block 8, the U-shaped clamping block 8 is driven by the reciprocating push cylinder 9 to move forward and backward, so that the bearing seat can move during the pressing process of the pressing seat 6, in order to avoid the situation that the bearing is stuck with the bearing seat during the pressing process of the bearing seat, the bearing seat is clamped in the U-shaped clamping block 8 during the pressing process of the shaft rod and the bearing, the U-shaped clamping block 8 is pushed forward and backward by the reciprocating push cylinder 9 for a certain stroke, so that the bearing seat can move between the bearing seat and the shaft rod during the pressing process.

[0036] As shown in Figure 3 and Figure 5 , the second pressing seat assembly includes a mounting seat 14, a sliding plate 15, a push cylinder 16, four telescopic cylinders 17, a sleeve 18 and a fixed seat 19, the mounting seat 14 is arranged on the lower bottom plate 4, the sliding plate 15 is slidingly installed on the upper side surface of the mounting seat 14, the push cylinder 16 is installed on the mounting seat 14, and the piston rod of the push cylinder 16 is connected with the sliding plate 15, the sliding plate 15 can slide forward and backward on the mounting seat 14 by the push cylinder 16, the four telescopic cylinders 17 are vertically arranged on the mounting seat 14, and the four telescopic cylinders 17 are arranged on both sides of the sliding plate 15 in two rows respectively, the fixed seat 19 is installed on the upper piston rod of the four telescopic cylinders 17, the sleeve 18 is vertically installed on the mounting seat 14, and the sleeve 18 is arranged with through holes at the upper and lower ends, the front side surface of the sleeve 18 is a vertical groove communicating with the inside of the sleeve 18, the shaft rod placed on the sliding plate 15 can be placed in the sleeve 18 through the vertical groove by the backward sliding of the sliding plate 15, after the shaft rod is placed on the sliding plate 15, the sliding plate 15 can be retracted into the mounting seat 14 by the push cylinder 16, so that the shaft rod on the sliding plate 15 is located in the sleeve 18, then the telescopic cylinders 17 are lowered, the sleeve 18 is lowered and abuts against the clamping spring on the shaft rod by the mounting seat 14, and then the pressing head two 20 presses the mounting seat 14 to apply pressing force to the mounting seat 14.

[0037] The lower end of the sleeve 18 is made of plastic, which can avoid the metal collision of the metal sleeve 18 on the bearing.

[0038] The six vertical columns 5 are arranged between the upper bottom plate 3 and the lower bottom plate 4, and the six vertical columns 5 are arranged in two rows from left to right, and the corresponding two vertical columns 5 in each row are located on the front and rear sides of the upper bottom plate and the lower bottom plate 4.

[0039] The shaft rod and bearing seat press fitting mechanism is installed between the left and middle rows of columns 5, and the oil seal shaft sleeve press fitting mechanism is installed between the middle and right rows of columns 5.

[0040] Position adjusting devices are arranged between the lower bottom plate 4 and the first and second press seat assemblies, and the position adjusting device comprises a positioning block 24 and an adjusting bolt 25.

[0041] The shaft rod and bearing seat press fitting mechanism further comprises a fixed plate one 26 and a guide column one 27, the piston rod of the booster cylinder one 11 is fixedly connected to the center of the fixed plate one 26, the guide column one 27 is provided with two, the two guide columns one 27 are symmetrically and vertically arranged on the upper side surface of the fixed plate 7, the upper bottom plate 3 is provided with a through hole one corresponding to the two guide columns one 27, the two guide columns one 27 are slidingly installed in the corresponding through holes one, and the press head one 10 is installed at the lower center of the fixed plate one 26.

[0042] The oil seal shaft sleeve press fitting mechanism further comprises a fixed plate two 28 and a guide column two 29, the piston rod of the booster cylinder two 21 is fixedly connected to the center of the fixed plate two 28, the guide column two 29 is provided with two, the two guide columns two 29 are symmetrically and vertically arranged on the upper side surface of the fixed plate 7, the upper bottom plate 3 is provided with a through hole two corresponding to the two guide columns two 29, the two guide columns two 29 are slidingly installed in the corresponding through holes two, and the press head two 20 is installed at the lower center of the fixed plate two 28.

[0043] The arrangement of the guide columns and the through holes can limit the fixed plate 7, so as to avoid the offset of the piston rod of the booster cylinder during the downward movement, and cause the press fitting damage between the shaft rod, the bearing and the bearing seat.

[0044] Through the technical scheme, the electrical operation of the shaft rod and bearing seat press fitting mechanism and the oil seal shaft sleeve press fitting mechanism is connected to the external PLC controller through the electrical connection mode of the prior art, and is monitored and controlled through the PLC controller. The shaft rod and bearing seat press fitting mechanism can cooperate the bearing seat, the bearing and the shaft rod through the press seat 6, and the displacement sensor one 13 and the pressure sensor one 12 at the position can detect the pressing force and the downward stroke amount during the press fitting process to determine whether the press fitting is complete. The oil seal shaft sleeve press fitting mechanism can press fit the snap spring on the shaft rod, and the pressure sensor two 22 and the displacement sensor two 23 can detect the press fitting pressure and the downward stroke amount of the snap spring, so as to determine whether the press fitting of the snap spring meets the installation parameters.

[0045] The press-fitting process equipment collects the tension and displacement sensor signals and processes. The output force-displacement curve is compared with the set value to output the signal, which can determine whether the press-fitting is qualified. If the press-fitting is not qualified, the equipment automatically alarms and prompts, and the press seat 6 is qualified, then the workpiece is manually taken out and flows into the next process.

[0046] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely divergences of the principles and spirit of the application and that numerous modifications, changes, substitutions, and alterations can be made thereto without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.

Claims

1. A column-type press for pressing shaft bearings, characterized in that: The system includes a frame, an upper base plate and a lower base plate mounted on the frame, and a shaft and bearing seat pressing mechanism and an oil seal and bushing pressing mechanism installed between the upper base plate and the lower base plate. The frame includes an upper platform and a lower platform, with the upper platform mounted above the lower platform and the lower base plate mounted above the lower platform. The upper platform faces downwards and is directly opposite the lower base plate. The upper base plate is mounted directly above the lower base plate, and a column is provided between the upper and lower base plates, which are fixedly connected by the column. The shaft and bearing seat pressing mechanism and the oil seal and bushing pressing mechanism are arranged side by side on the frame. The shaft and bearing housing press-fitting mechanism includes a press base assembly, a press head, a booster cylinder, a pressure sensor, and a displacement sensor. The press base assembly is mounted on a lower base plate, and the booster cylinder is mounted on an upper base plate with its piston rod positioned on the lower side of the upper base plate facing the press base assembly. The press head is mounted on the piston rod of the booster cylinder, and the press head cooperates with the press base assembly. The displacement sensor is mounted on an upper frame and detects the amount of displacement of the piston rod of the booster cylinder. The pressure sensor is installed between the piston rod of the booster cylinder and the press head, and detects the pressure applied by the booster cylinder to the press head. The oil seal bushing press-fitting mechanism includes a second press base assembly, a second press head, a second booster cylinder, a second pressure sensor, and a second displacement sensor. The second press base assembly is mounted on the lower base plate, the second booster cylinder is mounted on the upper base plate, and the piston rod of the second booster cylinder is located on the lower side of the upper base plate facing the second press base assembly. The second press head is mounted on the piston rod of the second booster cylinder and is configured to cooperate with the second press base assembly. The second displacement sensor is mounted on the upper frame and detects the amount of extension and retraction displacement of the piston rod of the second booster cylinder. The pressure sensor is installed between the piston rod of the second booster cylinder and the second press head and detects the pressure applied by the second booster cylinder to the second press head. The pressure seat assembly includes a pressure seat and a movable mechanism. The pressure seat is a vertical cylinder with a through groove on its side wall. The vertical cylinder is vertically mounted on the bottom plate. A fixed plate is provided on one side of the upper end of the vertical cylinder. The movable mechanism is mounted on the fixed plate. The shaft is placed inside the vertical cylinder through the through groove. The bearing seat that cooperates with the shaft is located at the top of the vertical cylinder, and the bearing seat is in contact with the movable mechanism. The movable mechanism includes a U-shaped locking block and a reciprocating push cylinder. The reciprocating push cylinder is mounted on a fixed plate, and the U-shaped locking block is mounted on the piston rod of the reciprocating push cylinder. The opening of the U-shaped locking block faces upward. When the bearing seat is located at the top of the vertical cylinder, the component mechanism of the bearing seat is placed inside the U-shaped locking block. The reciprocating push cylinder drives the U-shaped locking block to move back and forth, so that the bearing seat can move during the pressing process. The pressure seat assembly two includes a mounting base, a sliding plate, a push cylinder, a telescopic cylinder, a sleeve, and a fixed base. The mounting base is set on the lower base plate. The sliding plate is slidably mounted on the upper surface of the mounting base. The push cylinder is mounted on the mounting base, and the piston rod of the push cylinder is connected to the sliding plate. The push cylinder can push the sliding plate to slide back and forth on the mounting base. Four telescopic cylinders are vertically arranged on the mounting base, and the four telescopic cylinders are arranged in two rows on both sides of the sliding plate. The fixed base is mounted on the upper piston rod of the four telescopic cylinders. The sleeve is vertically mounted on the mounting base, and the sleeve is through at both the upper and lower ends. The front side of the sleeve is a vertical groove that connects to the inside of the sleeve. The shaft placed on the sliding plate can be placed inside the sleeve through the vertical groove by sliding the sliding plate backward.

2. The column-type press for pressing shaft bearings according to claim 1, characterized in that: The lower end of the sleeve is made of plastic.

3. The column-type press for pressing shaft bearings according to claim 1, characterized in that: The column is arranged between the upper base plate and the lower base plate, with two columns arranged in each row from left to right, and the corresponding two columns in each row are located on the front and back sides of the upper base plate and the lower base plate, respectively.

4. A column-type press for pressing shaft bearings according to claim 3, characterized in that: The shaft and bearing seat pressing mechanism is installed between the left and middle rows of columns, and the oil seal bushing pressing mechanism is installed between the middle and right rows of columns.

5. A column-type press for pressing shaft bearings according to claim 1, characterized in that: Both the first and second pressure base assemblies are provided with position adjustment devices between themselves and the lower base plate. The position adjustment device includes a positioning block and an adjusting bolt. The positioning block is installed on the lower base plate, and the corresponding pressure base assembly is installed on the corresponding positioning block. The adjusting bolt connects the positioning block and the corresponding pressure base assembly.

6. A column-type press for pressing shaft bearings according to claim 1, characterized in that: The shaft and bearing seat pressing mechanism also includes a fixed plate and a guide post. The piston rod of the booster cylinder is fixedly connected to the center of the fixed plate. Two guide posts are provided, which are symmetrically and vertically arranged on the upper surface of the fixed plate. A through hole is provided on the upper bottom plate corresponding to the two guide posts. The two guide posts are slidably installed in the corresponding through holes. The pressure head is installed at the lower center of the fixed plate.

7. A column-type press for pressing shaft bearings according to claim 1, characterized in that: The oil seal bushing press-fitting mechanism also includes a fixed plate two and a guide post two. The piston rod of the booster cylinder two is fixedly connected to the center of the fixed plate two. Two guide posts two are provided, and the two guide posts two are symmetrically and vertically arranged on the upper surface of the fixed plate. A through hole two is provided on the upper bottom plate corresponding to the two guide posts two. The two guide posts two are slidably installed in the corresponding through hole two. The press head two is installed at the lower center of the fixed plate two.

8. A column-type press for pressing shaft bearings according to any one of claims 1-7, characterized in that: The press-fitting process for the shaft bearing of the column-type press-fitting shaft bearing of the axially movable ball cage universal joint is as follows: (1) The bearing is installed into the support; (2) The inner oil seal is pressed into the support; (3) The shaft is installed into the bearing bore and the snap ring is installed manually; (4) The outer oil seal is pressed into the bearing support; (5) The retaining ring is installed onto the bushing; (6) The bushing is pressed into the shaft.

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