A method for assembling cylindrical rollers of bearings based on an integral cage

Abstract

This invention discloses a method for assembling cylindrical roller bearings based on an integral cage. The assembly device includes a positioning base and a pressing mechanism. The positioning base has a concave arc-shaped outer circular positioning surface at the center of its top surface, with a radius of curvature matching the outer circle radius of the bearing outer ring. The positioning base has a baffle at the rear end of the outer circular positioning surface. A boss extends forward from the top of the baffle, and the bottom surface of the boss is an arc surface concentric with the outer circular positioning surface, so that the bottom surface of the boss, the front end of the baffle, and the outer circular positioning surface form a groove for the bearing outer ring. The pressing mechanism includes a guide rail fixed to the center of the rear end face of the positioning base, a worktable mounted on the guide rail via a slider and connected to a worktable drive cylinder mounted at the rear of the guide rail, a pressure rod hinged in the middle to a fixed support and then hinged to a pressure rod drive cylinder via a movable hinge shaft, and a pressure block hinged to the front end of the pressure rod. This invention enables simple and rapid assembly of bearing rollers and cages, effectively ensuring assembly quality.

Description

Technical Field

[0001] The invention relates to an assembly method of a bearing cylindrical roller based on an integral retaining frame. Background Art

[0002] Cylindrical roller bearings are a common type of bearing with the advantage of high load capacity. Cylindrical roller bearings consist of an inner ring, an outer ring, rollers, and a cage. When assembling a cylindrical roller bearing, the cage and outer ring are usually positioned first, and the rollers are press-fitted into the cage pockets one by one before being mated with the inner ring.

[0003] Cylindrical roller bearings typically use copper or plastic-steel cages. The primary assembly process involves the rollers and cage assembly. There are two common methods for assembling these two components: a split-type rivet-welded assembly and a one-piece cage-locked assembly. In the split-type assembly, the cage consists of two parts. The rollers are placed in one half of the cage, and then the other half is closed. The two halves are welded together using anchors. In the one-piece assembly, the cage is a single piece. To prevent the rollers from falling out, the cage pockets are designed with locking notches, requiring external force to press the rollers into the cage pockets. The split-type assembly is generally used for small cylindrical roller bearings. Large cylindrical roller bearings often use one-piece cage assemblies. However, larger bearing rollers are more difficult to install, requiring greater force to press the rollers into the cage's locking notches. This makes assembly very complex, and the inability to control the force of the press can lead to numerous quality issues, such as bumps and dents. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a method for assembling cylindrical roller bearings based on an integral cage, which can simply and quickly assemble the bearing rollers and the cage, and ensure the assembly quality of the cylindrical roller bearings.

[0005] The object of the present invention is achieved as follows: a method for assembling cylindrical rollers of bearings based on an integral cage, using an assembly device for cylindrical rollers of bearings based on an integral cage, the assembly device comprising a positioning base and a press-fitting mechanism; wherein,

[0006] The plane of the positioning base is a rectangle with a length greater than the height of the bearing outer ring and a width greater than the length. A concave arc-shaped outer circle positioning surface with a curvature radius adapted to the outer circle radius of the bearing outer ring is provided in the middle of the top surface of the positioning base. The generatrix of the lowest position of the outer circle positioning surface overlaps with the center line of the length direction of the positioning base. The width of the outer circle positioning surface is adapted to the height of the bearing outer ring, so that the positioning base has a baffle at the rear end of the outer circle positioning surface, and a poorly arched boss extends forward from the top of the baffle. The bottom surface of the boss is an arc surface concentric with the outer circle positioning surface, and the curvature radius of the bottom surface of the boss is adapted to the inner circle radius of the bearing outer ring, so that the bottom surface of the boss, the front end surface of the baffle and the outer circle positioning surface constitute a slot for the bearing outer ring;

[0007] The press-fitting mechanism includes a guide rail seat, a workbench, a press rod and a press block;

[0008] The guide rail seat is vertically fixed to the middle of the rear end surface of the positioning base, and the axis of the guide rail seat is located on the extension line of the center line of the longitudinal direction of the positioning base;

[0009] A slider is installed at the bottom of the workbench, so that the workbench is installed on the guide rail seat through the slider; the rear end of the workbench is connected to the end of the piston rod of the workbench driving cylinder installed horizontally on the rear top surface of the guide rail seat; a fixed support is installed in the middle of the front top surface of the workbench, and a pressure rod driving cylinder is installed vertically in the middle of the rear top surface of the workbench;

[0010] A slot is provided on the bottom surface of the middle portion of the pressure rod, a pressure rod slide groove is provided horizontally on the bottom surface of the rear portion of the pressure rod, and a hinge shaft slide groove connected to the pressure rod slide groove is provided on the side of the pressure rod; the middle portion of the pressure rod is hinged to the fixed support through a fixed hinge shaft, and the rear portion of the pressure rod is hinged to the end of the piston rod of the pressure rod driving cylinder inserted into the pressure rod slide groove through a movable hinge shaft inserted in the hinge shaft slide groove;

[0011] The pressing block is hinged at the front end of the pressing rod, and the bottom surface of the pressing block is a concave arc surface adapted to the outer surface of the bearing roller;

[0012] The assembly method of the cylindrical roller bearing based on the integral cage comprises the following steps:

[0013] Step 1: Place the outer ring of the bearing upright on the outer cylindrical positioning surface of the positioning base, and push the outer ring of the bearing backward until the rear end face of the outer ring of the bearing is close to the front end face of the baffle of the positioning base, so that the outer ring of the bearing is embedded in the slot of the positioning base;

[0014] Step 2: Place the retainer inside the bearing outer ring, with the rear end of the retainer close to the boss of the positioning base. At the same time, adjust one of the retainer pockets to the lowest position so that the axis of the pocket and the centerline of the length direction of the positioning base are on the same vertical plane.

[0015] Step 3: Insert the first roller horizontally into the bottom pocket of the cage, then start the piston rod of the workbench drive cylinder and extend it forward, so that the workbench moves forward along the guide rail seat through the slider until the pressure block is directly above the first roller;

[0016] Step 4: Start the pressure rod to drive the piston rod of the cylinder to extend, so that the pressure rod moves forward along the pressure rod slide groove and rotates around the fixed hinge shaft on the fixed support, so that the pressure block presses the first roller downward until the first roller completely enters the pocket of the cage, thus completing the press installation of the first roller;

[0017] Step 5: Control the pressure rod to drive the piston rod of the cylinder to retract, lift the pressure block, and move the pressure rod backward along the pressure rod slide groove. Then rotate the outer ring of the bearing and adjust the other pocket of the retainer to the lower part of the seat. Repeat step 4 to press the second roller until all the rollers are press-fitted.

[0018] In the above-mentioned assembly method of cylindrical roller bearings based on an integral retainer, the press-fitting mechanism further includes a workbench limit block installed at the lower part of the front end surface of the workbench and a pressure rod limit block installed at the upper part of the front end surface of the workbench.

[0019] The beneficial effects of the assembly method of the cylindrical roller of the bearing based on the integral retainer of the present invention are: the double end faces of the bearing are positioned by positioning the outer cylindrical positioning surface and the groove on the positioning base, and external force is applied by the lever principle to complete the assembly of the bearing roller and the integral retainer; the device used in the present invention is simple to manufacture, and the processing and connection of the device can be completed by simple machining, thereby ensuring the installation quality of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is an axial cross-sectional view of an assembly device for cylindrical roller bearings based on an integral retainer according to the present invention;

[0021] Figure 2 is a front view of a positioning base in the assembly device of the present invention;

[0022] Figure 3 yes Figure 2 PP view in the figure. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] See also Figures 1 to 3 The assembly method of the cylindrical roller bearing based on the integral retainer of the present invention adopts an assembly device of the cylindrical roller bearing based on the integral retainer, and the assembly device includes a positioning base 2 and a press-fitting mechanism.

[0025] The plane of the positioning base 2 is rectangular, the length of the plane of the positioning base 2 is greater than the height of the bearing outer ring 11, and the width is greater than the length of the rectangle. A concave arc-shaped outer cylindrical positioning surface 2A with a curvature radius adapted to the radius of the outer cylindrical surface of the bearing outer ring 11 is provided in the middle of the top surface of the positioning base 2. The generatrix of the lowest position of the outer cylindrical positioning surface 2A overlaps with the center line of the length direction of the positioning base 2, and the width of the outer cylindrical positioning surface 2A is adapted to the height of the bearing outer ring 11, so that the positioning base 2 has a baffle 20 at the right end of the outer cylindrical positioning surface 2A, and a inferior arched boss 2B extends forward from the top of the baffle 20. The bottom surface of the boss 2B is a concave arc surface concentric with the outer cylindrical positioning surface 2A, and the curvature radius of the bottom surface of the boss 2B is adapted to the radius of the inner cylindrical surface of the bearing outer ring 11, so that the bottom surface of the boss 2B, the front end surface of the baffle 20 and the outer cylindrical positioning surface 2A constitute the slot 10 of the bearing outer ring 11.

[0026] The press-fitting mechanism includes a guide rail seat 3, a workbench 4, a press rod 5, a press block 6, a workbench limit block 7 and a press rod limit block 8; wherein,

[0027] The guide rail seat 3 is vertically fixed to the middle of the rear end surface of the positioning base 2, and the axis of the guide rail seat 3 is located on the extension line of the center line of the longitudinal direction of the positioning base 2; a workbench driving cylinder 3A is horizontally installed in the middle of the rear top surface of the guide rail seat 3;

[0028] A slider 40 is installed at the bottom of the workbench 4, so that the workbench 4 is mounted on the guide rail base 3 through the slider 40; the rear end of the workbench 4 is connected to the end of the piston rod of the workbench driving cylinder 3A; a fixed support 4A is installed in the middle of the top surface of the front end of the workbench 4, and a pressure rod driving cylinder 4B is installed vertically in the middle of the top surface of the rear end of the workbench 4;

[0029] A slot is provided on the bottom surface of the middle portion of the pressure rod 5, a pressure rod slot is provided horizontally on the bottom surface of the rear portion of the pressure rod 5, and a hinge slot 50 is provided on the side of the pressure rod 5 and is connected to the pressure rod slot. The middle portion of the pressure rod 5 is hinged to the fixed support 4A via a fixed hinge 5A, and the rear portion of the pressure rod 5 is hinged to the end of the piston rod of the pressure rod driving cylinder 4B inserted into the pressure rod slot via a movable hinge 5B inserted in the hinge slot 50.

[0030] The pressing block 6 is hinged to the front end of the pressing rod 5, and the bottom surface of the pressing block 6 is a concave arc surface adapted to the outer surface of the bearing roller 13;

[0031] The workbench limit block 7 is installed at the lower part of the front end surface of the workbench 4;

[0032] The pressure rod limiting block 8 is installed on the upper part of the front end surface of the workbench 4.

[0033] The assembly method of the cylindrical roller bearing based on the integral cage of the present invention comprises the following steps:

[0034] Step 1: Place the bearing outer ring 11 upright on the outer cylindrical positioning surface 2A of the positioning base 2, and push the bearing outer ring 11 backward until the rear end surface of the bearing outer ring 11 is close to the front end surface of the baffle 20 of the positioning base 2, so that the bearing outer ring 11 is embedded in the slot 10 of the positioning base 2;

[0035] Step 2: Place the retainer 12 inside the bearing outer ring 11, and place the rear end face of the retainer 12 against the front end face of the boss 2B of the positioning base 2 to ensure the relative position of the retainer 12 and the bearing outer ring 11. At the same time, adjust one pocket of the retainer 12 to the lowest position so that the axis of the pocket and the longitudinal centerline of the positioning base 2 are on the same vertical plane.

[0036] Step 3: First, insert the roller 13 horizontally into the lowermost pocket of the retainer 12. Then, start the piston rod of the workbench drive cylinder 3A and extend it forward, so that the workbench 4 moves forward along the guide rail seat 3 through the slider 40 until the pressure block 6 is directly above the roller 13.

[0037] Step 4: Start the pressure rod driving cylinder 4B to extend the piston rod, so that the pressure rod 5 moves forward along the pressure rod slot and rotates around the fixed hinge shaft 5A on the fixed support 4A, so that the pressure block 6 presses the roller 13 downward until the roller 13 completely enters the pocket of the retainer 12, thus completing the press-fitting of the first roller 12;

[0038] Step 5: Control the pressure rod to drive the piston rod of the cylinder 4B to retract, lift the pressure block 6, and at the same time move the pressure rod 5 backward along the pressure rod slide groove, then rotate the bearing outer ring 11, adjust the other pocket of the retainer 12 to the lowest part, repeat step 4, and press-fit the second roller 13 until all rollers 13 are press-fitted.

[0039] The assembly method of the bearing cylindrical roller based on the integral retainer of the present invention positions the double end faces of the bearing by positioning the outer cylindrical positioning surface and the groove on the positioning base, and applies external force through the lever principle to complete the assembly of the bearing roller and the integral retainer.

[0040] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Those skilled in the art may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the scope of the present invention and should be defined by the claims.

Claims

1. A method for assembling a cylindrical roller bearing based on an integral retainer, using an assembly device for a cylindrical roller bearing based on an integral retainer, the assembly device comprising a positioning base and a press-fitting mechanism; wherein: The plane of the positioning base is a rectangle with a length greater than the height of the outer ring of the bearing and a width greater than the length. A concave arc-shaped outer circle positioning surface with a curvature radius adapted to the outer circle radius of the outer ring of the bearing is provided in the middle of the top surface of the positioning base. The generatrix of the lowest position of the outer circle positioning surface overlaps with the center line of the length direction of the positioning base. The width of the outer circle positioning surface is adapted to the height of the outer ring of the bearing, so that the positioning base has a baffle at the rear end of the outer circle positioning surface, and a inferior arched boss extends forward from the top of the baffle. The bottom surface of the boss is an arc surface concentric with the outer circle positioning surface, and the curvature radius of the bottom surface of the boss is adapted to the inner circle radius of the outer ring of the bearing, so that the bottom surface of the boss, the front end surface of the baffle and the outer circle positioning surface constitute a groove of the outer ring of the bearing; The press-fitting mechanism comprises a guide rail seat, a workbench, a press rod and a press block; The guide rail seat is vertically fixed to the middle of the rear end surface of the positioning base, and the axis of the guide rail seat is located on the extension line of the center line of the length direction of the positioning base; A slider is installed at the bottom of the workbench, so that the workbench is installed on the guide rail seat through the slider; the rear end of the workbench is connected to the end of the piston rod of the workbench driving cylinder installed horizontally on the rear top surface of the guide rail seat; a fixed support is installed in the middle of the front top surface of the workbench, and a pressure rod driving cylinder is installed vertically in the middle of the rear top surface of the workbench; A slot is provided on the bottom surface of the middle part of the pressure rod, a pressure rod slide groove is provided horizontally on the bottom surface of the rear part of the pressure rod, and a hinge shaft slide groove connected to the pressure rod slide groove is provided on the side of the pressure rod; the middle part of the pressure rod is hinged to the fixed support through a fixed hinge shaft, and the rear part of the pressure rod is hinged to the end of the piston rod of the pressure rod driving cylinder inserted into the pressure rod slide groove through a movable hinge shaft inserted in the hinge shaft slide groove; The pressing block is hinged at the front end of the pressing rod, and the bottom surface of the pressing block is a concave arc surface adapted to the outer surface of the bearing roller; Characterized in that the assembly method comprises the following steps: Step 1: Place the outer ring of the bearing upright on the outer cylindrical positioning surface of the positioning base, and push the outer ring of the bearing backward until the rear end surface of the outer ring of the bearing is close to the front end surface of the baffle of the positioning base, so that the outer ring of the bearing is embedded in the groove of the positioning base; Step 2: Place the cage in the outer ring of the bearing, and place the rear end face of the cage close to the boss of the positioning base, and adjust the pocket of one cage to be at the bottom so that the axis of the pocket and the center line of the length direction of the positioning base are on the same vertical plane; Step 3: first insert the first roller horizontally into a pocket located at the bottom of the cage, then start the piston rod of the workbench driving cylinder to extend forward, so that the workbench moves forward along the guide rail seat through the slider until the pressure block is directly above the first roller; Step 4: Start the piston rod of the pressure rod driving cylinder to extend, so that the pressure rod moves forward along the pressure rod slide groove, and the pressure rod rotates around the fixed hinge shaft on the fixed support, so that the pressure block presses the first roller downward until the first roller completely enters the pocket of the cage, that is, the press fitting of the first roller is completed; Step 5: Control the piston rod of the pressure rod driving cylinder to retract, lift the pressure block, and move the pressure rod backward along the pressure rod slide groove. Then rotate the outer ring of the bearing, adjust the other pocket of the retainer to the lower part of the seat, repeat step 4, and press-fit the second roller until all the rollers are press-fitted.

2. The method for assembling cylindrical rollers of bearings based on an integral retainer according to claim 1, characterized in that: The press-fitting mechanism also includes a workbench limiting block installed at the lower part of the front end surface of the workbench and a pressure rod limiting block installed at the upper part of the front end surface of the workbench.

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