Cylindrical roller bearing retainer pocket lock point claw lock mouth size calculation method

Abstract

The invention discloses a method for calculating the size of a locking opening of a cylindrical roller bearing retainer pocket locking point claw, and relates to the technical field of cylindrical roller bearings. The problem that a bearing cannot be assembled due to the fact that deformation of a locking point claw after actual split pressure is not considered in an existing retainer locking opening and a roller protrudes out of a retainer is solved. The method is realized through the following steps: firstly, calculating the diameter size of the roller and the minimum silver layer thickness, then calculating the inner diameter size of the retainer, the maximum silver layer thickness and the pocket size of the retainer, and determining the thickness of the retainer according to each size parameter in the above steps. The maximum value and the minimum value of the size of the locking opening of the retainer locking point claw are calculated, the splitting pressure deformation of the pocket locking point claw of the cylindrical roller bearing retainer is considered during size calculation, and the design value of the size of the locking opening of the retainer locking point claw after splitting pressure is a range value; the size of the locking opening of the cylindrical roller bearing retainer pocket locking point claw can be accurately calculated, a roller cannot protrude out of the retainer, and it is guaranteed that a bearing is smoothly assembled.

Description

Technical Field

[0001] The present invention relates to the technical field of cylindrical roller bearings, and particularly relates to a method for calculating the locking dimension of the pocket hole locking point claws of a cylindrical roller bearing cage. Background Art

[0002] For the convenience of assembly and disassembly of cylindrical roller bearings and to prevent the rollers from scattering during this process, a locking point structure is added during the design of the cage, and requirements are imposed on the dimension after the locking point claws are locked.

[0003] In the prior art, the dimension after the cage is locked is given according to experience. Since the deformation of the actual splitting pressure of the cage locking point claws is not considered, although the locking dimension after splitting pressure meets the design requirements, the rollers will protrude from the cage during assembly, resulting in the inability to complete the assembly of the bearing.

[0004] In summary, the existing cage locking does not consider the deformation of the locking point claws after actual splitting pressure, and there is a problem that the rollers protrude from the cage, resulting in the inability to complete the assembly of the bearing. Summary of the Invention

[0005] The purpose of the present invention is to solve the problem that the existing cage locking does not consider the deformation of the locking point claws after actual splitting pressure, and there is a problem that the rollers protrude from the cage, resulting in the inability to complete the assembly of the bearing. Furthermore, a method for calculating the locking dimension of the pocket hole locking point claws of a cylindrical roller bearing cage is provided.

[0006] The technical solution of the present invention is: a method for calculating the locking dimension of the pocket hole locking point claws of a cylindrical roller bearing cage, and the method is realized through the following steps:

[0007] Step 1: Calculate the roller diameter dimension D w and the minimum silver layer thickness Y min ;

[0008] Step 2: Calculate the inner diameter dimension d of the cage c and the maximum silver layer thickness Y max ;

[0009] Step 3: Calculate the pocket hole dimension p of the cage c ;

[0010] Step 4: According to the various dimension parameters determined in Step 1, calculate the maximum value δ of the locking dimension of the cage locking point claws max ;

[0011] Step 5: According to the various dimension parameters determined in Steps 2 to 3, calculate the distance L between any point X between the vertex M of the cage locking point claw and the root point P of the cage locking point claw and the roller x ;

[0012] Step 6: Calculate the circumferential displacement δ of any point X on the locking claw after the locking claw of the cage is split according to the finite element method X ;

[0013] Step 7: When the circumferential displacement δ of any point X X , the distance L between any point X and the roller x and the maximum silver layer thickness Y max When the requirements are met, record the δ X The circumferential displacement δ of the corresponding point M M ;

[0014] Step 8: According to the cage pocket size p c and the circumferential displacement δ of point M M Calculate the minimum value of the locking jaw size of the cage locking point δ min ;

[0015] Step 9: The design value of the locking point claw of the cylindrical roller bearing cage pocket is δ min To δ max .

[0016] Furthermore, in step 4, the maximum value of the locking jaw size of the retaining frame locking point pawl is δ max The calculation steps are as follows:

[0017] The roller diameter D w and minimum silver layer thickness Y min Substituted into formula (1), the maximum value of the locking jaw size of the cage locking point δ is calculated max ;

[0018] δ max =D w +2*Y min -ε (1)

[0019] In formula (1), ε is the additional locking amount, which is selected as 0.01.

[0020] Furthermore, the distance L between any point X and the roller in step 5 is x The calculation steps are as follows:

[0021] The cage pocket size p c , Roller diameter D w And the inner diameter of the cage d c Substituting into equation (2), we can calculate the distance L between any point X and the roller: x ;

[0022]

[0023] In formula (2), d cX is the diameter of point X.

[0024] Further, the maximum silver layer thickness Y max , the distance L between any point X and the roller x and the circumferential displacement δ generated by any point X X are substituted into Equation (3). When Equation (3) is satisfied, it indicates that the locking point claw of the cage contacts the roller at X, and the δ under the satisfied conditions is recorded X The corresponding δ M value. At this time, the circumferential displacement of point M is δ M ,

[0025] δ X = L x - Y max (3).

[0026] Further, the minimum value δ of the locking mouth size of the locking point claw of the cage in Step Eight is calculated as follows: min The calculation steps are as follows:

[0027] The cage pocket size p c and the circumferential displacement of point M being δ M are substituted into Equation (4) to calculate the minimum value δ of the locking mouth size of the locking point claw of the cage min ,

[0028] δ min = p c - 2 * δ M (4).

[0029] Further, when the circumferential displacement δ generated by any point X is substituted into Equation (3) and Equation (3) is not satisfied, the displacement of the splitting and pressing tooling is increased, and δ is calculated again X until Equation (3) is satisfied, and the δ under the satisfied conditions is recorded X The corresponding δ X value. M

[0030] The present invention has the following effects compared with the prior art:

[0031] 1. The calculation method for the locking mouth size of the locking point claw of the cage of the cylindrical roller bearing provided by the present invention takes into account the splitting and pressing deformation of the locking point claw of the cage of the cylindrical roller bearing. The designed value of the locking mouth size of the locking point claw of the cage after splitting and pressing is a range value, and the locking mouth size of the locking point claw of the cage of the cylindrical roller bearing can be calculated more accurately. The roller will not protrude from the cage, ensuring the smooth assembly of the bearing. Description of the Drawings

[0032] Figure 1 is a schematic diagram of the initial positional relationship between the locking point claw of the cage of the cylindrical roller bearing of the present invention and the roller; ​

[0033] Figure 2 It is a schematic diagram of the maximum value of the locking notch dimension of the pocket locking point claw of a cylindrical roller bearing cage;

[0034] Figure 3 It is a schematic diagram of the minimum value of the locking notch dimension of the pocket locking point claw of a cylindrical roller bearing cage;

[0035] Figure 4 It is a finite element calculation flow chart. Specific implementation manner

[0036] Specific implementation manner one: Combining Figures 1 to 4 To illustrate this implementation manner, this implementation manner is achieved through the following steps. Step one: Calculate the roller diameter dimension D w and the minimum silver layer thickness Y min ;

[0037] Step two: Calculate the inner diameter dimension d of the cage c and the maximum silver layer thickness Y max ;

[0038] Step three: Calculate the pocket dimension p of the cage c ;

[0039] Step four: According to the various dimension parameters determined in step one, calculate the maximum value δ of the locking notch dimension of the cage locking point claw max ;

[0040] Step five: According to the various dimension parameters determined in steps two to three, calculate the distance L between any point X between the vertex M and the root point P of the cage locking point claw and the roller x ;

[0041] Step six: Calculate the circumferential displacement δ generated by any point X on the locking point claw after the locking point claw of the cage is split and pressed according to the finite element method X ;

[0042] Step seven: When the circumferential displacement δ generated by any point X X , the distance L between any point X and the roller x and the maximum silver layer thickness Y max meet the requirements, record the circumferential displacement amount δ of point M corresponding to this δ X ; M ;

[0043] Step eight: Calculate the minimum value δ of the locking notch dimension of the cage locking point claw according to the pocket dimension p of the cage c and the circumferential displacement amount δ of point M M ; min ;

[0044] Step Nine: The designed value of the locking notch size of the cage pocket locking point claw of the cylindrical roller bearing is δ min to δ max .

[0045] It should be noted that in this embodiment, the silver layer thickness refers to the silver plating layer thickness of the cage.

[0046] Specific Embodiment Two: In combination with Figure 3 to illustrate this embodiment, the maximum value δ max of the locking notch size of the cage locking point claw in Step Four of this embodiment is calculated as follows:

[0047] Substitute the roller diameter size D w and the minimum silver layer thickness Y min into Equation (1), and calculate to obtain the maximum value δ max of the locking notch size of the cage locking point claw;

[0048] δ max = D w + 2 * Y min - ε (1)

[0049] In Equation (1), ε is the additional locking amount, and 0.01 is selected.

[0050] Other compositions and connection relationships are the same as those in Specific Embodiment One.

[0051] Specific Embodiment Three: In combination with Figures 1 to 3 to illustrate this embodiment, the distance L x between any point X and the roller in Step Five of this embodiment is calculated as follows:

[0052] Substitute the cage pocket size p c , the roller diameter size D w and the inner diameter size d c of the cage into Equation (2), and calculate to obtain the distance L x between any point X and the roller;

[0053]

[0054] In Equation (2), d cX is the diameter of point X.

[0055] Other compositions and connection relationships are the same as those in Specific Embodiment One.

[0056] Specific Embodiment Four: In combination with Figures 1 to 3 to illustrate this embodiment, in this embodiment, the maximum silver layer thickness Y max , the distance L x between any point X and the roller, and the circumferential displacement δ XSubstitute it into Equation (3). When Equation (3) is satisfied, it indicates that the locking point claw of the cage contacts the roller at X, and record δ under the satisfied conditions. X The corresponding δ M value. At this time, the circumferential displacement of point M is δ M ,

[0057] δ X = L x - Y max (3)

[0058] Other compositions and connection relationships are the same as those in the third specific embodiment.

[0059] Specific embodiment five: Combine Figures 1 to 3 To illustrate this embodiment, in step eight of this embodiment, the minimum value δ of the locking port size of the cage locking point claw min is calculated as follows:

[0060] Substitute the pocket size p of the cage c and the circumferential displacement of point M, which is δ M into Equation (4), and calculate to obtain the minimum value δ of the locking port size of the cage locking point claw min ,

[0061] δ min = p c - 2 * δ M (4)

[0062] Other compositions and connection relationships are the same as those in the fourth specific embodiment.

[0063] Specific embodiment six: Combine Figures 1 to 4 To illustrate this embodiment, in this embodiment, substitute the circumferential displacement δ generated by any point X X into Equation (3). When Equation (3) is not satisfied, increase the displacement of the splitting and pressing tooling, and calculate δ again X until Equation (3) is satisfied, and record δ under the satisfied conditions X The corresponding δ M value. Specifically, establish a finite element model of the cage and the splitting and pressing tooling, constrain the inner diameter of the cage, and give a certain displacement to the splitting and pressing tooling, and the circumferential displacement δ of all points between point P and point M of the cage locking point claw under this displacement can be calculated X . When δ X does not satisfy Equation (3), increase the displacement of the splitting and pressing tooling, and calculate δ again X until it is satisfied, and record δ under the satisfied conditions X The corresponding δ M value. Each calculation can obtain a set of δ p …δ X …δ M , so δX It is determined that δ M is also determined.

[0064] Other compositions and connection relationships are the same as those in the fourth specific implementation manner.

[0065] The content of the present invention is not limited to the content of the above various implementation manners, and the combination of one or several specific implementation manners can also achieve the purpose of the invention.

Claims

1. A method for calculating the locking dimension of the locking point claw of the pocket of a cylindrical roller bearing cage, characterized in that, The method is implemented through the following steps: Step 1: Calculate the roller diameter dimension D w and the minimum silver layer thickness Y min ; Step 2: Calculate the inner diameter dimension d of the cage c and the maximum silver layer thickness Y max ; Step 3: Calculate the size p of the cage pocket c ; Step 4: Calculate the maximum value δ of the locking port dimension of the cage locking point claw according to the respective dimension parameters determined in Step 1 max ; Step Five: Calculate the distance L between any point X between the vertex M and the root point P of the cage locking point claw and the roller according to the respective dimensional parameters determined in Steps Two to Three x ; Step 6: Calculate the circumferential displacement δ generated at any point X on the locking point claw after the locking point claw of the cage is split and pressed according to the finite element method X ; Step Seven: When the circumferential displacement δ generated by any point X X , the distance L between any point X and the roller x and the maximum silver layer thickness Y max meet the requirements, record the circumferential displacement δ X of the corresponding point M M ; Step Eight: Based on the size p of the cage pocket c and the circumferential displacement δ of point M M calculate the minimum value δ of the locking mouth size of the cage locking point claw min ; Step 9: The designed value of the locking mouth size of the locking point claw of the cylindrical roller bearing cage pocket is δ min to δ max .

2. The method for calculating the locking notch size of the locking point claws of the pockets of the cylindrical roller bearing cage according to claim 1, wherein The maximum value δ of the size of the pocket of the cage locking point claw in the fourth step max The calculation steps are as follows: Bring the roller diameter dimension D w and the minimum silver layer thickness Y min into Equation (1) to calculate the maximum value δ of the retainer locking point claw locking opening dimension max ; δ max = D w + 2 * Y min - ε(1) In formula (1), ε is the additional locking amount, and 0.01 is selected.

3. The calculation method for the locking notch dimension of the locking point claws of the pockets of the cylindrical roller bearing cage according to claim 1, wherein, The distance L between any point X and the roller in the fifth step x The calculation steps are as follows: The cage pocket size p c , the roller diameter size D w and the cage inner diameter size d c are substituted into Equation (2) to calculate the distance L between any point X and the roller x ; In formula (2), d cX is the diameter of point X.

4. The calculation method of the locking notch dimension of the locking point claw of the pocket of the cylindrical roller bearing cage according to claim 3, characterized in that Bring the maximum silver layer thickness Y max , the distance L between any point X and the roller x and the circumferential displacement δ generated by any point X X into Equation (3). When Equation (3) is satisfied, it indicates that the locking point claw of the cage contacts the roller at X after splitting and pressing, and record δ under the satisfied conditions X The corresponding δ M value. At this time, the circumferential displacement of point M is δ M , δ X = L x - Y max (3).

5. The method for calculating the locking port size of the locking point claw of the cage pocket of a cylindrical roller bearing according to claim 4, characterized in that, The minimum value δ of the retainer locking point claw locking opening dimension in the eighth step min The calculation steps are as follows: The size p of the cage pocket hole c and the circumferential displacement of point M is δ M Substitute into Equation (4) to calculate the minimum value δ of the size of the locking mouth of the cage locking point claw min , δ min = p c - 2*δ M (4).

6. The method for calculating the locking notch size of the locking point claws of the pocket of the cylindrical roller bearing cage according to claim 4, characterized in that, The circumferential displacement δ generated by any point X X Substitute it into Equation (3). When Equation (3) is not satisfied, increase the displacement of the splitting and pressing tooling and calculate δ again X Until Equation (3) is satisfied, record δ under the satisfied conditions X The corresponding δ M value

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