CN217345337U - Bearing cold contraction mounting tool - Google Patents
Bearing cold contraction mounting tool Download PDFInfo
- Publication number
- CN217345337U CN217345337U CN202220475348.6U CN202220475348U CN217345337U CN 217345337 U CN217345337 U CN 217345337U CN 202220475348 U CN202220475348 U CN 202220475348U CN 217345337 U CN217345337 U CN 217345337U
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- bearing
- load nut
- guide rod
- top cap
- push rod
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Abstract
The utility model discloses a bearing cold contraction installation tool, which comprises a step pin and a top cap, wherein the step pin consists of a support table, a push rod and a guide rod; the guide rod, the push rod and the support platform are cylinders which are coaxially connected in sequence; the top cap is provided with an axially extending through hole, is sleeved on the guide rod and is in clearance fit with the guide rod; the diameter of the guide rod is smaller than the inner diameter of the bearing, and the diameter of the push rod is smaller than the inner diameter of the mounting hole in the load nut. The bearing is pressed into the load nut under the action of the press by utilizing the push rod on the step pin to be matched with the top cap, and the guide rod of the step pin is utilized to guide the installation and the guide of the bearing in the load nut; the utility model has the advantages of simple structure, easily operation can realize the assembly between load nut and the bearing fast simultaneously, can guide the route of marcing of bearing in the assembling process, ensures that the bearing accuracy is packed into in the load nut, has effectively reduced the assembly degree of difficulty and assembly error, has improved the qualification rate of assembly.
Description
Technical Field
The utility model belongs to the technical field of the mechanical assembly technique and specifically relates to a bearing shrinkage mounting tool.
Background
365-52-30-92265-205 load nut and BJ12TH-M22 shrink-fit mounting bearing are common assembling parts in aircraft equipment hatch door, and the design requirements of the design require that BJ12TH-M22 shrink-fit mounting bearing must ensure that WH-50-S02 seal ring is accurately assembled in the groove of 365-52-30-92265-205 load nut after being installed, and a certain gap is required between two BJ12TH-M22 shrink-fit mounting bearings, which puts a high requirement on the installation position of BJ12TH-M22 shrink-fit mounting bearing.
Because the structure of the load nut 365-52-30-92265-205 cold-shrink mounting bearing is complex and the assembly difficulty of the BJ12TH-M22 cold-shrink mounting bearing is high, the qualification rate of the BJ12TH-M22 cold-shrink mounting bearing in the industry at present is only about 70 percent, and because the BJ12TH-M22 cold-shrink mounting bearing and the BJ 12-30-92265-205 load nut are made of stainless steel, once the mounting position of the bearing has errors, the BJ12TH-M22 cold-shrink mounting bearing cannot be removed and can only be scrapped together with the load nut 365-52-30-92265-205 cold-shrink mounting bearing; the 365-52-30-92265-205 load nut has a long manufacturing period which is generally as long as 1 to 2 months, while the BJ12TH-M22 cold shrink mounting bearing is purchased from abroad, the purchasing period is generally as long as 5 to 6 months, and once the parts and the standard parts are scrapped, the normal delivery of the whole cargo door product is seriously influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that: the bearing cold-shrink mounting tool can effectively reduce the assembly difficulty between the cold-shrink mounting bearing and the load nut.
In order to solve the technical problem the utility model discloses the technical scheme who adopts is: the bearing cold-shrinkage mounting tool comprises a load nut, bearings, a step pin and a top cap, wherein the two bearings are respectively mounted in two mounting holes of the load nut, the load nut is provided with a groove positioned on the periphery of the mounting holes, and the step pin consists of a support table, a push rod and a guide rod; the guide rod, the push rod and the support platform are cylinders which are coaxially connected in sequence; the top cap is provided with an axially extending through hole, and the top cap is sleeved on the guide rod and is in clearance fit with the guide rod; the diameter of the guide rod is smaller than the inner diameter of the bearing, and the diameter of the push rod is smaller than the inner diameter of the mounting hole in the load nut.
Further, the method comprises the following steps: the diameter of the push rod is smaller than that of the supporting table and larger than the aperture of the through hole in the top cap.
Further, the method comprises the following steps: the length of the top cap is smaller than that of the guide rod.
Further, the method comprises the following steps: the difference between the diameter of the guide rod and the inner diameter of the bearing was 0.03 mm.
Further, the method comprises the following steps: the difference between the diameter of the push rod and the inner diameter of the mounting hole in the load nut is 0.03 mm.
Further, the method comprises the following steps: the width of the support table is 0.2m greater than the distance from the groove to the edge of the load nut.
The utility model has the advantages that: the utility model realizes the assembly between the load nut and the bearing by the matching of the step pin and the top cap in the bearing cold contraction installation tool, supports the load nut by utilizing the supporting platform on the step pin, presses the bearing into the load nut under the action of the press by utilizing the push rod on the step pin to match the top cap, and guides the installation guide of the bearing in the load nut by utilizing the guide rod of the step pin; the utility model has the advantages of simple structure, easily operation can realize the assembly between load nut and the bearing fast simultaneously, can guide the route of marcing of bearing in the assembling process, ensures that the bearing accuracy is packed into in the load nut, has effectively reduced the assembly degree of difficulty and assembly error, has improved the qualification rate of assembly.
Drawings
FIG. 1 is a schematic structural view of a middle step pin and a top cap of the present invention;
FIG. 2 is a schematic view of the load nut and bearing assembly;
FIG. 3 is a schematic structural view of a step pin;
FIG. 4 is a schematic structural view of the top cap;
labeled as: 100-load nut, 110-groove, 200-bearing, 300-step pin, 310-support table, 320-push rod, 330-guide rod, 400-top cap.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be further described with reference to the accompanying drawings and examples.
As shown in fig. 1, the bearing cold-shrink mounting tool disclosed by the present invention is used for assembling between a load nut 100 and a bearing 200, two mounting holes for mounting the bearing 200 are provided on the load nut 100, the two bearings 200 are respectively mounted in the two mounting holes of the load nut 100, and a certain gap exists after the two bearings 200 are assembled; the load nut 100 is provided with a groove 110 at the periphery of the mounting hole, and the groove 110 is used for mounting the sealing ring after the load nut 100 and the bearing 200 are assembled.
As shown in fig. 2 to 4, the bearing cold-shrink mounting tool includes a step pin 300 and a top cap 400, the step pin 300 is composed of a support table 310, a push rod 320 and a guide rod 330, the support table 310, the push rod 320 and the guide rod 330 are all cylindrical and coaxially connected in sequence, and the diameters of the support table 310, the push rod 320 and the guide rod 330 are gradually reduced; the top cap 400 is a cylinder with a through hole extending axially at the center, the top cap 400 can be sleeved on the guide rod 330, the top cap 400 is in clearance fit with the guide rod 330 so that the top cap 400 can move along the guide rod 330, and therefore, the length of the top cap 400 is smaller than that of the guide rod 330; the push rod 320 has a diameter smaller than that of the support platform 310 and larger than the diameter of the through hole of the top cap 400. When the load nut 100 and the bearing 200 are assembled by using a bearing cold-shrink mounting tool, the load nut 100 and the bearing 200 are sleeved on the guide rod 330, the load nut 100 is pressed down by the top cap 400, the load nut 100 and the bearing 200 approach each other under the combined action of the top cap 400 and the support platform 310, and the bearing 200 is pressed into a corresponding mounting hole on the load nut 100; for the guide rod 330 to guide the bearing 200, the diameter of the guide rod 330 should be smaller than the inner diameter of the bearing 200, and the diameter of the push rod 320 should be smaller than the inner diameter of the mounting hole in the load nut 100 because the push rod 320 pushes the bearing 200 into the mounting hole of the load nut 100.
Since the bearing shrink mounting tool disclosed in the present invention mainly aims at the assembly between the load nut 365-52-30-92265 and the BJ12TH-M22 shrink mounting bearing, the size of each component is preferably set according to the size of the load nut 365-52-30-92265 and the shrink mounting bearing BJ12TH-M22, so that the difference between the diameter of the guide rod 330 and the inner diameter of the bearing 200 can be further set to be 0.03mm, the difference between the diameter of the push rod 320 and the inner diameter of the mounting hole in the load nut 100 is set to be 0.03mm, and the width of the support table 310 is 0.2M greater than the distance from the groove 110 to the edge of the load nut 100. Of course, the utility model discloses also be applicable to the assembly between the load nut of other sizes and the bearing, as long as according to the size of the load nut of treating the assembly and the bearing to bearing shrinkage mounting tool's dimensional parameter correspond the design can.
Examples
When the 365-52-30-92265-205 load nut and the BJ12TH-M22 bearing are assembled, the method comprises the following steps:
vertically placing the step pin 300 on a supporting surface of a press machine, and fixing a supporting platform 310 of the step pin 300 on the supporting surface of the press machine;
shrinking the BJ12TH-M22 bearing, and then sequentially sleeving the shrunk BJ12TH-M22 bearing, 365-52-30-92265 and 205 load nut and the top cap 400 on the guide rod 330 of the step pin 300;
starting the press equipment, and slowly pressing the top cap 400 by a pressure head of the press equipment at a constant speed to gradually merge and assemble the load nut 365-52-30-92265 and the BJ12TH-M22 bearing under the guiding action of the guide rod 330 until the lower end surface of the load nut 365-52-30-92265 and the load nut 205 abuts against the upper end surface of the support table 310 on the step pin 300;
closing the press equipment, lifting the press head, taking the load nut 365-52-30-92265 and 205 with the 1 BJ12TH-M22 bearing installed off the step pin 300, visually checking whether the groove 110 on the load nut 365-52-30-92265 and 205 is exposed or not, and continuing the subsequent installation work if the groove 110 is exposed;
installing another cold-shrunk BJ12TH-M22 bearing in another corresponding installation hole of the load nut 365-52-30-92265-205, wherein the load nut 365-52-30-92265-205 needs to be assembled after being overturned in the opposite direction, and because a gap exists between the two bearings after the assembly is finished, the two BJ12TH-M22 bearings are prohibited to be installed continuously from the same direction;
after the assembly of another BJ12TH-M22 bearing is completed, visual inspection is carried out to see whether the grooves 110 on the two sides of the load nut 365-52-30-92265-205 are exposed or not, if the grooves 110 on the two sides are exposed, the surface bearing is successfully installed, the design requirement is met, and the subsequent installation of the sealing ring can be carried out.
Adopt the utility model discloses a bearing shrinkage mounting tool installs above-mentioned step and carries out 20 parts in succession and 40 are 365-52-30-92265 supplyes load nut and 80 BJ12TH-M22 bearing's assembly back, carry out the quality inspection, the installation of all bearings all satisfies the drawing design requirement, the simple operation of installation in the operating personnel feedback assembling process simultaneously, need not rely on any operating skill hardly, not only improve work efficiency and product quality, establish solid foundation for the high-quality of whole cargo door product, punctual, low-cost delivery again.
Claims (6)
1. Bearing shrinkage mounting tool, including load nut (100) and bearing (200), install respectively in two mounting holes of load nut (100) two bearing (200), be equipped with on load nut (100) and be located mounting hole outlying recess (110), its characterized in that: the device also comprises a step pin (300) and a top cap (400), wherein the step pin (300) consists of a support platform (310), a push rod (320) and a guide rod (330); the guide rod (330), the push rod (320) and the support table (310) are cylinders which are coaxially connected in sequence; the top cap (400) is provided with an axially extending through hole, and the top cap (400) is sleeved on the guide rod (330) and is in clearance fit with the guide rod (330); the diameter of the guide rod (330) is smaller than the inner diameter of the bearing (200), and the diameter of the push rod (320) is smaller than the inner diameter of a mounting hole in the load nut (100).
2. The bearing shrink mounting tool of claim 1, wherein: the diameter of the push rod (320) is smaller than that of the support platform (310) and larger than the aperture of the through hole in the top cap (400).
3. The bearing shrink mounting tool of claim 1, wherein: the length of the top cap (400) is less than that of the guide rod (330).
4. The bearing shrink mounting tool of claim 1, wherein: the difference between the diameter of the guide rod (330) and the inner diameter of the bearing (200) is 0.03 mm.
5. The bearing shrink mounting tool of claim 1, wherein: the difference between the diameter of the push rod (320) and the inner diameter of the mounting hole in the load nut (100) is 0.03 mm.
6. The bearing shrink mounting tool of claim 1, wherein: the width of the support platform (310) is 0.2m larger than the distance from the groove (110) to the edge of the load nut (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220475348.6U CN217345337U (en) | 2022-03-04 | 2022-03-04 | Bearing cold contraction mounting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220475348.6U CN217345337U (en) | 2022-03-04 | 2022-03-04 | Bearing cold contraction mounting tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217345337U true CN217345337U (en) | 2022-09-02 |
Family
ID=83051877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220475348.6U Active CN217345337U (en) | 2022-03-04 | 2022-03-04 | Bearing cold contraction mounting tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217345337U (en) |
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2022
- 2022-03-04 CN CN202220475348.6U patent/CN217345337U/en active Active
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