A high-precision double-row rolling mill bearing assembly tool assembly and assembly method

Abstract

A high-precision double-row rolling mill bearing assembly tool assembly and an assembly method. The present application relates to the technical field of bearing processing. The present application solves the problems of the existing axial assembly, the lack of constraint in the circumferential direction, the inability to control the size of the gap between adjacent rollers, the deformation of the retainer, the easy scratching of the rollers, and the problem of turning over and blocking the cover. The assembly tool assembly comprises a base, an equal interval frame and a roller supporting sleeve. The lower end of the base is provided with a disc, the outer edge of the upper end surface of the center hole is fixedly connected with a limiting sleeve, the upper end surface of the disc is fixedly connected with a positioning ring, and the upper end surface of the positioning ring is uniformly provided with a plurality of positioning holes in the circumferential direction. The upper end of the equal interval frame is provided with a connecting ring, the lower end surface of the connecting ring is vertically and uniformly provided with a plurality of spacing rods in the circumferential direction, and the spacing rods are one-to-one corresponding to the positioning holes. The inner side wall of the roller supporting sleeve is uniformly provided with a plurality of arc grooves in the circumferential direction, and each arc groove is arranged in the axial direction. The present application is used for double-row rolling mill bearing assembly.

Description

Technical Field

[0001] This invention relates to the field of bearing processing technology, specifically to a high-precision double-row rolling mill bearing assembly tool assembly and assembly method. Background Technology

[0002] In recent years, the domestic mining and steel smelting industries have developed rapidly, leading to a surge in the demand for rolling mill bearings. Therefore, improving the service life and production efficiency of rolling mill bearings has become a key focus for bearing industry technicians. While the machining precision of bearing parts has reached a high level, outdated assembly technology has resulted in reduced bearing production efficiency and a loss of precision. Currently, the assembly method for high-precision double-row rolling mill bearings is manual assembly without auxiliary tools. Because the inner ring has a flange, it is impossible to assemble the rollers into the cage axially. In actual production, one assembly method involves placing two layers of rollers around the inner ring raceway and securing them with two rubber bands to provide circumferential restraint. Because the rubber bands are constricting the rollers, there is almost no gap between adjacent rows of rollers. The gaps between the rollers are then manually pried open row by row before the cage is inserted. Since the gaps are not equal, it is difficult to insert the cage into the gaps between the rollers during assembly, resulting in extremely low assembly efficiency. Another assembly method is to rotate each component of the bearing 90 degrees and place it on the workbench for rolling. This causes the cage to deform and the rollers to be scratched, resulting in a decrease in bearing accuracy due to improper assembly.

[0003] In summary, the problems currently existing in assembling high-precision double-row rolling mill series bearings are as follows: 1. Due to the inner ring having a flange, it is impossible to install the rollers into the cage pocket in the axial direction; 2. There is no constraint in the circumferential direction during assembly; 3. The clearance between adjacent rollers cannot be controlled; 4. Cage deformation; 5. Roller scratches; 6. The overall weight after assembly is too heavy, making it difficult to flip over and install the retaining cover. Summary of the Invention

[0004] In order to solve the problems of existing bearings such as inability to assemble axially, lack of circumferential constraints, inability to control the gap between adjacent rollers, cage deformation, easy scratching of rollers, and the need for flipping to install the cover, this invention proposes a high-precision double-row rolling mill bearing assembly tool assembly and assembly method.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0006] A high-precision double-row rolling mill bearing assembly tool assembly includes a base, a spacer frame, and a roller sleeve. The lower end of the base is provided with a disc, and the center of the disc has a central hole. A limit sleeve is fixed to the outer edge of the upper end face of the central hole. A positioning ring is fixed to the upper end face of the disc, and multiple positioning holes are evenly distributed along the circumferential direction on the upper end face of the positioning ring. The upper end of the spacer frame is provided with a connecting ring, and multiple spacer rods are evenly distributed and vertically fixed along the circumferential direction on the lower end face of the connecting ring. The spacer rods are arranged one-to-one with the positioning holes. Multiple arc grooves are evenly distributed along the circumferential direction on the inner side wall of the roller sleeve, and each arc groove is arranged along the axial direction.

[0007] The connecting ring is positioned above the positioning ring, each spacer is inserted into a positioning hole, the support roller sleeve is positioned on the upper end face of the disc, and the inner side wall of the support roller sleeve is fitted onto the outer side of the positioning ring. Each arc groove is positioned between two adjacent spacers.

[0008] Furthermore, a gap is provided between the inner circumferential sidewall of the positioning ring and the outer circumferential sidewall of the limiting sleeve.

[0009] Furthermore, the disc, the central hole, the limiting sleeve, and the positioning ring are all coaxially arranged.

[0010] Furthermore, the lower end of the spacer is provided with a pointed tip.

[0011] Furthermore, the number of positioning holes, spacers, and arc grooves are all set in a manner corresponding to the number of rollers.

[0012] Furthermore, the outer diameter of the limiting sleeve matches the inner diameter of the double-sided inner ring.

[0013] Furthermore, the inner diameter of the positioning ring matches the outer diameter of the flange of the inner ring of the double flange.

[0014] Furthermore, the outer diameter of the positioning ring matches the outer diameter of the cover, and the positioning hole corresponds one-to-one with the equally spaced holes on the cover.

[0015] A method for assembling high-precision double-row rolling mill bearings includes the following steps:

[0016] Step 1: Install the cover: Set the base disc horizontally, place the cover on the upper surface of the positioning ring, and set the equally spaced holes of the cover directly above the positioning holes.

[0017] Step 2: Install the double-edge inner ring: Place the double-edge inner ring on the upper surface of the disc and fit it on the outside of the limiting sleeve. The lower edge of the double-edge inner ring is set in the gap between the inner circumferential side wall of the positioning ring and the outer circumferential side wall of the limiting sleeve.

[0018] Step 3: Install the dividing spacer: Place the dividing spacer directly above the cover, and set the spacer rods to correspond one-to-one with the dividing holes of the cover. Insert the lower ends of the spacer rods into the corresponding dividing holes and positioning holes of the cover.

[0019] Step 4: Install the rollers: Fill the space between every two spacers with rollers. First, install the lower layer of rollers. After the lower layer of rollers is fully laid, install the upper layer of rollers on top of the lower layer of rollers to complete the laying of the upper layer of rollers.

[0020] Step 5: Install the roller sleeves: Place the roller sleeves on the upper surface of the disc from top to bottom, and fit them on the outside of the positioning ring. Each arc groove is fitted on the outside of the two corresponding rollers in the upper and lower layers.

[0021] Step 6: Install the retainer: Pull the dividing spacer vertically upwards and remove it. Then, install the retainer from top to bottom in the original position of the dividing spacer and connect the retainer to the cover.

[0022] Step 7: Remove the assembly tool components: First, pull the roller sleeve vertically upwards and remove it. Then, remove the assembled bearing assembly from the base and flip the bearing assembly over to prepare for the next process.

[0023] Furthermore, after installing the double-edged inner ring in step two, the upper end face of the lower side of the double-edged inner ring is flush with the upper end face of the cover.

[0024] The beneficial effects of this invention compared to the prior art are:

[0025] This invention provides a high-precision assembly tool assembly and method for double-row rolling mill bearings. A specially designed tool assembly enables more accurate bearing positioning during assembly, provides circumferential constraints for the rollers during assembly, ensures the clearance between adjacent rollers, and facilitates operation. Based on this assembly tool assembly, an assembly method is designed that facilitates cage installation. The top-to-bottom installation method prevents cage deformation and eliminates the need for flipping the cage to install the retaining cover, reducing labor intensity; it also prevents roller scratches and cage deformation, significantly improving production efficiency. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the double-shoulder inner ring 4 in this invention;

[0027] Figure 2 This is a schematic diagram of the structure of roller 5 in this invention;

[0028] Figure 3 This is a schematic diagram of the cage 6 in this invention;

[0029] Figure 4 This is a schematic diagram of the structure of the cover 7 in this invention;

[0030] Figure 5 This is a schematic diagram of the bearing assembly after cold working and assembly;

[0031] Figure 6 This is a schematic diagram of the structure of the base 1 in this invention;

[0032] Figure 7 This is a schematic diagram of the structure of the equal-divided spacer 2 of the present invention;

[0033] Figure 8 This is a schematic diagram of the structure of the roller sleeve 3 in this invention;

[0034] Figure 9 This is a schematic diagram of the structure after the cover 7 is installed in step one of the present invention;

[0035] Figure 10 This is a schematic diagram of the structure after installing the double-blade inner ring 4 in step two of the present invention;

[0036] Figure 11 This is a schematic diagram of the structure after installing the equally spaced partition 2 in step three of the present invention;

[0037] Figure 12 This is a schematic diagram of the structure after the roller 5 is installed in step four of the present invention;

[0038] Figure 13 This is a schematic diagram of the structure after installing the roller sleeve 3 in step five of the present invention;

[0039] Figure 14 This is a schematic diagram of the structure after removing the equally spaced partition 2 in step six of the present invention;

[0040] Figure 15 This is a schematic diagram of the structure of inserting the retainer 6 in step six of the present invention;

[0041] Figure 16 This is a schematic diagram of the structure after removing the support roller sleeve 3 in step seven of the present invention;

[0042] Figure 17 This is a schematic diagram of the structure of removing the bearing assembly from the base 1 in step seven of the present invention;

[0043] Figure 18 This is a schematic diagram of the bearing assembly after it has been flipped over in step seven of this invention. Detailed Implementation

[0044] Specific implementation method one: Combining Figures 1 to 18This embodiment describes a high-precision double-row rolling mill bearing assembly tool assembly, comprising a base 1, a spacer 2, and a roller sleeve 3. The lower end of the base 1 has a disc 1-1 with a central hole 1-2 in the middle. A limit sleeve 1-3 is fixedly attached to the outer edge of the upper surface of the central hole 1-2. A positioning ring 1-4 is fixedly attached to the upper surface of the disc 1-1, and multiple positioning holes 1-5 are evenly distributed along the circumferential direction on the upper surface of the positioning ring 1-4. The upper end of the spacer 2 has a connecting ring 2-1, and multiple spacer rods 2-2 are evenly distributed and vertically fixed along the circumferential direction on the lower surface of the connecting ring 2-1. Each spacer rod 2-2 corresponds to one of the positioning holes 1-5. Multiple arc grooves 3-1 are evenly distributed along the circumferential direction on the inner wall of the roller sleeve 3, each arc groove 3-1 being arranged along the axial direction.

[0045] The connecting ring 2-1 is set above the positioning ring 1-4. Each spacer rod 2-2 is inserted into a positioning hole 1-5. The support roller sleeve 3 is set on the upper end face of the disc 1-1, and the inner side wall of the support roller sleeve 3 is fitted onto the outer side of the positioning ring 1-4. Each arc groove 3-1 is set between two adjacent spacer rods 2-2.

[0046] This type of double-row rolling mill bearing consists of a flangeless outer ring that does not participate in the assembly process, a double-flange inner ring 4 that participates in the assembly process, rollers 5, a machined brass cage 6, and a brass cover 7. The conventional assembly method is to stack two layers of rollers 5 together and install them outside the raceway of the double-flange inner ring 4. After all the rollers 5 are installed, the cage 6 is then fastened. After rotating 180 degrees, the cover 7 is fastened on the other side of the cage, completing the cold-working assembly.

[0047] In this embodiment, the positioning ring 1-4 is used to support the cover 7, the positioning hole 1-5 matches the equally spaced hole of the cover 7, and the sum of the heights of the positioning ring 1-4 and the cover 7 is consistent with the edge height of the inner ring 4 of the double edge.

[0048] The roller sleeve 3 can both constrain the circumference and separate the rollers.

[0049] During assembly, the cover 7 in the bearing assembly is placed on the positioning ring 1-4 of the base 1, with the equally spaced holes on the cover 7 aligned with the positioning holes 1-5. Then, the equally spaced spacers 2, used to space each row of rollers 5, are installed. All the rollers 5 in the bearing assembly are then sequentially inserted into the gaps in the equally spaced spacers 2. Next, the roller support sleeves 3 are placed, which both restrict the circumferential position of each layer of rollers 5 and ensure the clearance between adjacent rollers. The equally spaced spacers 2 are removed, and the cage 6 in the bearing assembly is installed. The roller support sleeves 3 are then removed, and the assembled bearing assembly is removed from the base 1. This operation completes the assembly of this type of bearing.

[0050] Specific Implementation Method Two: Combining Figures 1 to 18In this embodiment, a gap is provided between the inner circumferential sidewall of the positioning ring 1-4 and the outer circumferential sidewall of the limiting sleeve 1-3. The undisclosed technical features in this embodiment are the same as in specific embodiment one.

[0051] The aforementioned gap is used to install the double-blade inner ring 4.

[0052] Specific implementation method three: Combining Figures 1 to 18 In this embodiment, the disc 1-1, center hole 1-2, limiting sleeve 1-3, and positioning ring 1-4 are all coaxially arranged. The undisclosed technical features in this embodiment are the same as in specific embodiment two.

[0053] Specific implementation method four: Combination Figures 1 to 18 This embodiment describes a spacer 2-2 with a pointed tip at its lower end. Undisclosed technical features in this embodiment are the same as in specific embodiment one.

[0054] Specific Implementation Method Five: Combining Figures 1 to 18 In this embodiment, the number of positioning holes 1-5, spacer rods 2-2, and arc grooves 3-1 corresponds to the number of rollers 5. Undisclosed technical features in this embodiment are the same as in specific embodiment one.

[0055] Specific Implementation Method Six: Combination Figures 1 to 18 This embodiment describes a method where the outer diameter of the limiting sleeve 1-3 matches the inner diameter of the double-sided inner ring 4. Undisclosed technical features in this embodiment are the same as in specific embodiment one.

[0056] Specific implementation method seven: Combination Figures 1 to 18 In this embodiment, the inner diameter of the positioning ring 1-4 matches the outer diameter of the flange of the inner ring 4 with double flanges. The undisclosed technical features in this embodiment are the same as in specific embodiment one.

[0057] Specific implementation method eight: Combination Figures 1 to 18 In this embodiment, the outer diameter of the positioning rings 1-4 matches the outer diameter of the cover 7, and the positioning holes 1-5 correspond one-to-one with the equally spaced holes on the cover 7. The undisclosed technical features in this embodiment are the same as in Specific Embodiment 1.

[0058] Specific Implementation Method Nine: Combining Figures 1 to 18 This embodiment describes a high-precision double-row rolling mill bearing assembly method, which includes the following steps:

[0059] Step 1: Install cover 7: Set the disc 1-1 of base 1 horizontally, place cover 7 on the upper surface of positioning ring 1-4, and set the equally spaced holes of cover 7 directly above positioning holes 1-5.

[0060] Step 2: Install the double-edge inner ring 4: Place the double-edge inner ring 4 on the upper surface of the disc 1-1 and fit it on the outside of the limiting sleeve 1-3. The lower edge of the double-edge inner ring 4 is set in the gap between the inner circumferential side wall of the positioning ring 1-4 and the outer circumferential side wall of the limiting sleeve 1-3.

[0061] Step 3: Install the equal-dividing spacer 2: Place the equal-dividing spacer 2 directly above the cover 7. The spacer rods 2-2 are set one by one with the equal-dividing holes of the cover 7. Insert the lower ends of the spacer rods 2-2 into the corresponding equal-dividing holes and positioning holes 1-5 of the cover 7 respectively.

[0062] Step 4: Install rollers 5: Fill the space between every two spacers 2-2 with rollers 5. First, install the lower layer of rollers 5. After the lower layer of rollers 5 is fully laid, install the upper layer of rollers 5 on the top of the lower layer of rollers 5. The upper layer of rollers 5 is now fully laid.

[0063] Step 5: Install the support roller sleeve 3: Place the support roller sleeve 3 on the upper surface of the disc 1-1 from top to bottom, and fit it on the outside of the positioning ring 1-4. Each arc groove 3-1 is fitted on the outside of the two rollers 5 that are correspondingly set in the upper and lower layers.

[0064] Step 6: Install retainer 6: Pull out the equal-dividing spacer 2 vertically upwards and remove it. Then install retainer 6 from top to bottom in the original position of equal-dividing spacer 2 and connect retainer 6 to cover 7.

[0065] Step 7: Remove the assembly tool components: First, pull the roller sleeve 3 vertically upwards and remove it. Then, remove the assembled bearing assembly from the base 1 and turn the bearing assembly over to prepare for the next process.

[0066] The assembled bearing assembly is removed and flipped over to prepare for the next process of electric riveting (thermal processing).

[0067] Specific Implementation Method Ten: Combining Figures 1 to 18 In this embodiment, after installing the double-sided inner ring 4 in step two, the upper end face of the lower side of the double-sided inner ring 4 is flush with the upper end face of the cover 7. The undisclosed technical features in this embodiment are the same as in specific embodiment nine.

[0068] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-precision double-row rolling mill bearing assembly method, based on a high-precision double-row rolling mill bearing assembly tool assembly, including a base (1), an equal-dividing spacer (2), and a roller sleeve (3). The lower end of the base (1) is provided with a disc (1-1), the middle part of the disc (1-1) is provided with a central hole (1-2), the outer edge of the upper end face of the central hole (1-2) is fixedly connected with a limiting sleeve (1-3), and a positioning ring (1-4) is fixedly connected to the upper end face of the disc (1-1). 4) The upper end face is provided with multiple positioning holes (1-5) evenly distributed along the circumferential direction; the upper end of the equally divided spacer (2) is provided with a connecting ring (2-1), and multiple spacer rods (2-2) are evenly distributed and vertically fixed along the circumferential direction on the lower end face of the connecting ring (2-1). The spacer rods (2-2) are set one-to-one with the positioning holes (1-5); the inner side wall of the roller sleeve (3) is provided with multiple arc grooves (3-1) evenly distributed along the circumferential direction. Each arc groove (3-1) is set along the axial direction. The connecting ring (2-1) is set above the positioning ring (1-4), each spacer rod (2-2) is inserted into a positioning hole (1-5), the support roller sleeve (3) is set on the upper end face of the disc (1-1), and the inner side wall of the support roller sleeve (3) is fitted on the outer side of the positioning ring (1-4), and each arc groove (3-1) is set between two adjacent spacer rods (2-2); A gap is provided between the inner circumferential sidewall of the positioning ring (1-4) and the outer circumferential sidewall of the limiting sleeve (1-3); The disc (1-1), the central hole (1-2), the limiting sleeve (1-3), and the positioning ring (1-4) are all coaxially arranged; The lower end of the spacer (2-2) is provided with a pointed tip; The number of positioning holes (1-5), spacer rods (2-2), and arc grooves (3-1) are all set in a manner corresponding to the number of rollers (5); The outer diameter of the limiting sleeve (1-3) matches the inner diameter of the double-sided inner ring (4); The inner diameter of the positioning ring (1-4) matches the outer diameter of the flange of the inner ring (4) with double flanges; The outer diameter of the positioning ring (1-4) matches the outer diameter of the cover (7), and the positioning hole (1-5) is set one-to-one with the equally spaced hole on the cover (7); characterized in that The method includes the following steps: Step 1, Install the cover (7): Set the disc (1-1) of the base (1) horizontally, place the cover (7) on the upper surface of the positioning ring (1-4), and set the equally spaced holes of the cover (7) directly above the positioning holes (1-5). Step 2: Install the double-edge inner ring (4): Place the double-edge inner ring (4) on the upper surface of the disc (1-1) and fit it on the outside of the limiting sleeve (1-3). The lower edge of the double-edge inner ring (4) is set in the gap between the inner circumferential side wall of the positioning ring (1-4) and the outer circumferential side wall of the limiting sleeve (1-3). Step 3: Install the dividing spacer (2): Place the dividing spacer (2) directly above the cover (7), and set the dividing rod (2-2) and the dividing hole of the cover (7) one by one. Insert the lower end of the dividing rod (2-2) into the corresponding dividing hole and positioning hole (1-5) of the cover (7); Step 4: Install rollers (5): Fill the space between every two spacer bars (2-2) with rollers (5). First, install the lower layer rollers (5). After the lower layer rollers (5) are fully laid, install the upper layer rollers (5) on the upper end of the lower layer rollers (5) to complete the laying of the upper layer rollers (5). Step 5: Install the support roller sleeve (3): Place the support roller sleeve (3) from top to bottom on the upper surface of the disc (1-1) and fit it on the outside of the positioning ring (1-4). Each arc groove (3-1) is fitted on the outside of the two rollers (5) that are correspondingly set in the upper and lower layers. Step 6: Install the retainer (6): Pull the dividing spacer (2) vertically upward and remove it. Then install the retainer (6) from top to bottom in the original position of the dividing spacer (2) and connect the retainer (6) to the cover (7). Step 7: Remove the assembly tool components: First, pull the roller sleeve (3) vertically upwards to remove it, then remove the assembled bearing assembly from the base (1), and turn the bearing assembly over to prepare for the next process.

2. A high-precision double-row rolling mill bearing assembly method according to claim 1, characterized in that: After installing the double-edged inner ring (4) in step two, the upper end face of the lower side of the double-edged inner ring (4) is flush with the upper end face of the cover (7).

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