CN222133207U - Tapered roller bearing retainer closing device - Google Patents
Tapered roller bearing retainer closing device Download PDFInfo
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- CN222133207U CN222133207U CN202420630345.4U CN202420630345U CN222133207U CN 222133207 U CN222133207 U CN 222133207U CN 202420630345 U CN202420630345 U CN 202420630345U CN 222133207 U CN222133207 U CN 222133207U
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- material returning
- gathering
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- 239000000463 material Substances 0.000 claims abstract description 56
- 238000001125 extrusion Methods 0.000 claims abstract description 18
- 238000003825 pressing Methods 0.000 claims description 17
- 238000005096 rolling process Methods 0.000 claims description 7
- 239000004809 Teflon Substances 0.000 claims description 5
- 229920006362 Teflon® Polymers 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009963 fulling Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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- Rolling Contact Bearings (AREA)
Abstract
The utility model discloses a tapered roller bearing retainer mouth gathering device, which comprises a machine tool workbench and a vertically moving machine tool sliding block. The lower die comprises a lower die plate, a male die connector and a stretching male die, wherein the male die connector is detachably fixed between the stretching male die and the lower die plate, and the top of the stretching male die is provided with a conical bearing surface matched with the inner wall of the retainer. The upper die is annular and is located directly over the lower die, the upper die comprises an upper die plate, a material returning backing plate, a material returning plate and a closing die, the upper die plate is mounted to a machine tool sliding block, the material returning backing plate is detachably fixed between the material returning plate and the upper die plate, the closing die is annular and fixed to the upper die plate, a conical extrusion surface matched with the outer wall of the retainer is arranged in the closing die, a closing surface is formed below the conical extrusion surface, the closing surface can extrude a large-diameter ring frame towards the center of the retainer, closing processing of the retainer is achieved, and the processing efficiency is high and the closing effect of the retainer is good.
Description
Technical Field
The utility model belongs to the technical field of retainer closing-in, and particularly relates to a tapered roller bearing retainer closing-in device.
Background
The improvement of the power and the efficiency of the equipment in each country is a sign for measuring the technical and economic forces of each country, and has great and profound significance. With the development of domestic and foreign economy, the power increase and the efficiency improvement are the main pursued performances of the equipment. In order to meet the requirements of high reliability and long service life of equipment, the bearing with high reliability, long service life and high rated dynamic load is required to be matched with the bearing. The rated dynamic load demands are increasing for high load bearings that the power-increasing machinery must match. A large rated dynamic load is required with the main parameters of the bearing unchanged in a limited space.
At present, the tapered roller bearing increases the load by increasing the number of rollers and usually adopts hollow rollers, but the hollow roller production process cannot be guaranteed. Chinese patent application No. CN202010607750.0 discloses a stamping cage tapered roller bearing with improved structure. The tapered roller bearing comprises an outer ring, an inner ring, a retainer and rolling bodies, wherein the retainer comprises a large-diameter ring frame, a small-diameter ring frame and a plurality of window beams for connecting the large-diameter ring frame and the small-diameter ring frame, window holes for accommodating the rolling bodies are formed between adjacent window beams, and an outer ring raceway and an inner ring raceway are arranged at contact positions of the outer ring and the inner ring with the outer peripheral surface of the rolling bodies respectively. Through moving the holder outward, increase the diameter of holder promptly for the outer lane raceway is pressed close to the holder, keeps away from the central point of bearing, thereby under the unchangeable circumstances of window beam width, increases the quantity of rolling element, improves rated dynamic load and satisfies bearing life.
However, increasing the diameter of the retainer tends to reduce the structural strength of the retainer, and the retainer tends to deform. And after the retainer is close to the outer ring raceway, the large-diameter ring frame is easy to contact with the outer ring, and the operation of the retainer is interfered. Therefore, a hole closing device is needed to be designed to close the large-diameter ring frame of the retainer, so that interference between the large-diameter ring frame and the outer ring of the retainer is prevented.
Disclosure of utility model
In order to overcome the defects, the utility model provides the tapered roller bearing retainer mouth gathering device, and the upper die moves towards the lower die, so that the mouth gathering on the inner side of the mouth gathering female die extrudes the large-diameter ring frame of the retainer, the mouth gathering treatment of the retainer is realized, the mouth gathering treatment efficiency is high, and the mouth gathering effect is good.
The utility model is realized by the following technical scheme:
A tapered roller bearing retainer closing device is provided, wherein a machine tool is provided with a machine tool workbench and a vertically moving machine tool sliding block, and the closing device comprises a lower die and an upper die. The upper die is annular and is positioned right above the lower die, the upper die comprises an upper die plate, a material returning base plate, a material returning plate and a closing die, the upper die plate is mounted to a machine tool sliding block, the material returning base plate is detachably fixed between the material returning plate and the upper die plate, the closing die is annular and is fixed to the upper die plate, a conical extrusion surface matched with the outer wall of the retainer is arranged in the closing die, a closing surface is formed below the conical extrusion surface, the closing surface can extrude a large-diameter ring frame towards the center of the retainer, the closing process of the retainer is realized, the processing efficiency is high, and the closing effect of the retainer is good.
Further, a guide cambered surface is arranged below the mouth gathering surface, and the conical extrusion surface, the mouth gathering surface and the guide cambered surface are in smooth transitional connection so that the retainer can smoothly enter the inside of the mouth gathering female die.
Further, the surfaces of the conical extrusion surface, the gathering surface and the guiding cambered surface are coated with a Teflon coating. The Teflon coating can reduce the surface friction coefficients of the conical extrusion surface, the gathering mouth surface and the guiding cambered surface, and reduce the gathering mouth resistance of the retainer.
Further, a closing opening hoop ring is arranged on the outer side of the closing opening female die and sleeved to the outer wall of the closing opening female die so as to strengthen the closing opening female die.
When the retainer is in the non-molding state, the retainer further comprises a round bottom plate, the small-diameter ring frame and the round bottom plate form a bowl bottom of the retainer, and a center hole is formed in the round bottom plate. The gathering device can carry out gathering processing operation on the formed retainer and gathering processing operation on the non-formed retainer.
Further, when the retainer in the non-formed state is processed by the mouth gathering device, a central column is also fixed on the stretching male die, and the diameter of the central column is the same as that of the central hole, so that the positioning of the non-formed retainer is realized.
Further, the upper side of the center column is provided with external threads, the lower die further comprises a pressing plate, a threaded hole matched with the external threads is formed in the inner side of the pressing plate, the pressing plate is provided with an extrusion surface which is extruded to the bowl bottom of the retainer, so that the retainer is clamped and fixed above the stretching male die, and stability of the retainer is improved when the retainer is subjected to opening gathering operation.
Further, a material returning groove which is communicated with each other is formed between the material returning base plate and the material returning plate, a material returning cylinder is arranged in the material returning groove, the material returning cylinder comprises a cylinder body and a push rod, the cylinder body is fixed to the material returning base plate, and the push rod is arranged to the material returning plate. The cylinder body pushes out the push rod so that the material returning plate is separated from the material returning base plate, and the material returning plate pushes the retainer so that the retainer can be separated from the clamping of the female die with the gathering mouth.
Further, a plurality of mounting holes are formed in the lower die plate and the upper die plate, so that the opening closing device is convenient to mount to a machine tool.
Further, the lower die plate and the stretching male die are connected with the male die connector through bolts, and the female die with the gathering mouth is connected with the upper die plate through bolts.
The utility model has the beneficial effects that:
1. The upper die moves towards the lower die, so that the gathering port on the inner side of the gathering port female die extrudes the large-diameter ring frame of the retainer, the gathering port treatment of the retainer is realized, the gathering port treatment efficiency is high, and the gathering port effect is good;
2. The retainer formed by the gathering device can reduce interference between the retainer and the outer ring, is convenient for outward movement of the retainer in the bearing, and improves rated load of the bearing.
Drawings
FIG. 1 is a schematic diagram illustrating the connection of an exemplary embodiment of a tapered roller bearing retainer closure device in accordance with the present utility model;
FIG. 2 is a schematic view illustrating the construction of an exemplary embodiment of a tapered roller bearing retainer closure device in accordance with the present utility model;
FIG. 3 is a cross-sectional view illustrating an exemplary embodiment of a tapered roller bearing retainer closure device in accordance with the present utility model;
FIG. 4 is a schematic diagram showing a part of the view A in FIG. 3;
FIG. 5 is a cross-sectional view illustrating another exemplary embodiment of a tapered roller bearing retainer segment device in accordance with the present utility model;
FIG. 6 is a schematic diagram showing a partial enlargement at B in FIG. 5;
FIG. 7 is a schematic view illustrating the construction of an exemplary embodiment of a cage according to the present utility model;
FIG. 8 is a cross-sectional view illustrating an exemplary embodiment of a cage according to the present utility model;
FIG. 9 is a schematic view showing a part of the view of FIG. 8 at C;
Fig. 10 is a schematic view illustrating an exemplary embodiment of the retainer of the present utility model in an unformed state.
List of parts and reference numerals:
1. The lower die, 11, the lower die plate, 12, the male die connector, 13, the stretching male die, 131, the conical bearing surface, 14, the central column, 15, the pressing plate, 2, the upper die, 21, the upper die plate, 22, the material returning backing plate, 23, the material returning plate, 24, the mouth gathering female die, 241, the conical extrusion surface, 242, the mouth gathering surface, 243, the guiding cambered surface, 25, the mouth gathering hoop, 26, the material returning groove, 27, the mounting hole, 28, the material returning cylinder, 281, the cylinder body, 282, the push rod, 3, the retainer, 31, the large-diameter ring frame, 32, the small-diameter ring frame, 33, the window beam, 34, the window hole, 35, the bowl bottom, 351 and the central hole.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, in the embodiments of the present utility model, terms such as left, right, up, down, front, and back are merely relative terms or references to a normal use state of a product, i.e. a traveling direction of the product, and should not be construed as limiting.
In addition, the dynamic terms such as "relative movement" in the embodiments of the present utility model include not only a change in position but also a movement in which a state is changed without a relative change in position such as rotation or rolling.
Finally, it is noted that when an element is referred to as being "on" or "disposed on" another element, it can be on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.
As shown in fig. 1 to 6, a tapered roller bearing retainer mouth-gathering device is provided, a machine tool is provided with a machine tool workbench and a machine tool sliding block which moves vertically, and the mouth-gathering device comprises a lower die 1 and an upper die 2. The lower die 1 comprises a lower die plate 11, a male die connector 12 and a stretching male die 13, wherein the lower die plate 11 is arranged on a machine tool workbench, the male die connector 12 is detachably fixed between the stretching male die 13 and the lower die plate 11, a conical bearing surface 131 matched with the inner wall of the retainer 3 is arranged at the top of the stretching male die 13, the upper die 2 is annular and is positioned right above the lower die 1, the upper die 2 comprises an upper die plate 21, a material returning backing plate 22, a material returning plate 23 and a mouth gathering female die 24, the upper die plate 21 is arranged on a machine tool sliding block, the material returning backing plate 22 is detachably fixed between the material returning plate 23 and the upper die plate 21, the mouth gathering female die 24 is annular and is fixed on the upper die plate 21, a conical extrusion surface 241 matched with the outer wall of the retainer 3 is arranged in the mouth gathering female die 24, a mouth gathering surface 242 is formed below the conical extrusion surface 241, and the mouth gathering surface 242 can extrude a large-diameter ring frame 31 towards the center of the retainer 3, so that the mouth gathering treatment of the retainer 3 is realized, the treatment efficiency is high, and the mouth gathering effect of the retainer 3 is good.
In one embodiment, when the retainer 3 is closed, the closing device is firstly installed, when the lower die 1 is installed, the lower die plate 11 is installed on a machine tool workbench, the male die connector 12 is installed on the lower die plate 11, the stretching male die 13 matched with the retainer 3 is installed on the male die connector 12 from bottom to top, when the upper die 2 is installed, the upper die plate 21 is installed on a machine tool sliding block from top to bottom, the material returning base plate 22 is installed on the upper die plate 21, the material returning plate 23 matched with the retainer 3 is installed on the material returning base plate 22, then the closing female die 24 is sleeved on the outer sides of the material returning base plate 22 and the material returning plate 23, and the closing female die 24 is fixed on the upper die plate 21.
Next, the retainer 3 is mounted, and the retainer 3 is back-fastened to the upper side of the stretching punch 13, so that the inner wall of the retainer 3 is brought into contact with the tapered bearing surface 131 of the stretching punch 13. Finally, starting the machine tool, enabling the machine tool slide block to vertically move downwards, enabling the retainer 3 mounted above the stretching male die 13 to enter the inner side of the mouth gathering female die 24, enabling the mouth gathering surface 242 of the mouth gathering female die 24 to be abutted with the large-diameter ring frame 31 of the retainer 3 along with the downward movement of the upper die 2, enabling the upper die 2 to continuously move downwards, enabling the mouth gathering surface 242 of the mouth gathering female die 24 to squeeze the large-diameter ring frame 31 towards the center of the retainer 3 until the outer wall of the large-diameter ring frame 31 is attached to the mouth gathering surface 242, enabling the outer wall of the retainer 3 to be attached to the conical extrusion surface 241 at the moment, and achieving mouth gathering operation of the retainer 3. The machine tool slide block moves vertically upwards to separate the upper die 2 from the lower die 1, and the retainer 3 with the completed closing opening is taken out to be subjected to closing operation on the next retainer 3. When the machine tool is needed to be described, a machine tool workbench and a machine tool sliding block of the machine tool are all in the prior art, and the machine tool is cited as a power mechanism for driving the upper die 2 and the lower die 1 to move relatively, so that the specific structure of the machine tool is not repeated.
Preferably, a guiding cambered surface 243 is arranged below the gathering surface 242, and the conical extrusion surface 241, the gathering surface 242 and the guiding cambered surface 243 are in smooth transitional connection so that the retainer 3 can smoothly enter the inside of the gathering female die 24.
In one embodiment, during the production process, the dimensions of the retainer 3 are deviated, and the position of the retainer 3 placed on the stretching male die 13 is also deviated, so that the female die 24 of the gathering mouth is not aligned with the retainer 3, and damage to the workpiece of the retainer 3 is easily caused. The device is characterized in that the guiding cambered surface 243 is arranged below the gathering surface 242, and the diameter of the cross section where the guiding cambered surface 243 is arranged is gradually increased along the vertical downward direction, namely, the guiding cambered surface 243 is in an upward gathering mode, so that the retainer 3 can smoothly enter the inside of the gathering female die 24.
Preferably, the surfaces of the tapered compression face 241, the gathering face 242 and the guide curved face 243 are coated with a teflon coating. The teflon coating can reduce the surface friction coefficients of the conical extrusion surface 241, the gathering surface 242 and the guiding cambered surface 243, and reduce the gathering resistance to the retainer 3.
Preferably, a closing opening pinching ring 25 is arranged on the outer side of the closing opening female die 24, and the closing opening pinching ring 25 is sleeved on the outer wall of the closing opening female die 24 so as to strengthen the closing opening female die 24.
Preferably, as shown in fig. 7 to 10, the cage 3 has a molded state and an unmolded state, when the cage 3 is in the molded state, the cage 3 includes a large-diameter ring frame 31, a small-diameter ring frame 32, and a plurality of window beams 33 connecting the large-diameter ring frame 31 and the small-diameter ring frame 32, windows 34 for accommodating rolling bodies are formed between the adjacent window beams 33, and when the cage 3 is in the unmolded state, the cage 3 further includes a circular bottom plate, the small-diameter ring frame 32 and the circular bottom plate constitute a bowl bottom 35 of the cage 3, and the circular bottom plate is provided with a center hole 351. The mouth gathering device can carry out mouth gathering processing operation on the formed retainer 3 and can also carry out mouth gathering processing operation on the unformed retainer 3, so that the application range of the mouth gathering device is increased.
Preferably, when the mouth gathering device processes the non-molded retainer 3, the central column 14 is also fixed on the stretching male die 13, and the diameter of the central column 14 is the same as that of the central hole 351, so as to position the non-molded retainer 3.
In one embodiment, when the retainer 3 is mounted on the stretching punch 13, the central hole 351 of the bowl bottom 35 of the retainer 3 is sleeved on the central column 14, and the central column 14 plays a role in positioning the retainer 3 because the diameter of the central column 14 is the same as that of the central hole 351.
Preferably, the upper part of the central column 14 is provided with external threads, the lower die 1 further comprises a pressing plate 15, a threaded hole matched with the external threads is formed in the inner side of the pressing plate 15, the pressing plate 15 is provided with an extrusion surface extruded to the bowl bottom 35 of the retainer 3, so that the retainer 3 is clamped and fixed above the stretching male die 13, and the stability of the retainer 3 is improved when the retainer 3 is subjected to the closing operation.
In one embodiment, after the completion of the closing operation of the retainer 3, the upper die 2 is separated from the lower die 1, and the closing surface 242 of the closing die 24 presses the large diameter ring frame 31 of the retainer 3, so that after the upper die 2 is separated from the lower die 1, the retainer 3 is clamped inside the closing die 24, and when the clamping is tight, it is difficult to take out the retainer 3. Therefore, the pressing plate 15 is installed above the center post 14, the pressing plate 15 has a pressing action on the retainer 3 having the bowl bottom 35, and when the upper die 2 is separated from the lower die 1, the retainer 3 is fixed to the stretching punch 13 under the pressing of the pressing plate 15, effectively preventing the retainer 3 from being clamped to the inside of the tucking die 24.
Preferably, a material returning groove 26 which is communicated with each other is formed between the material returning base plate 22 and the material returning plate 23, a material returning cylinder 28 is arranged in the material returning groove 26, the material returning cylinder 28 comprises a cylinder 281 and a push rod 282, the cylinder 281 is fixed to the material returning base plate 22, and the push rod 282 is arranged to the material returning plate 23. The cylinder 281 pushes out the push rod 282 to separate the ejector plate 23 from the ejector pad 22, and the ejector plate 23 pushes the retainer 3 so that the retainer 3 can be released from the nip die 24.
In an embodiment, after the completion of the operation of closing the mouth of the retainer 3, if the retainer 3 is clamped to the inner side of the mouth-closing die 24, the material returning cylinder 28 can be controlled wirelessly, and the material returning cylinder 28 generates a pushing force on the material returning plate 23, so that the material returning plate 23 pushes the retainer 3 downward, and the extraction of the retainer 3 in the mouth-closing die 24 is achieved.
Preferably, a plurality of mounting holes 27 are formed in both the lower die plate 11 and the upper die plate 21, so that the opening closing device can be conveniently mounted on a machine tool.
Preferably, the lower die plate 11 and the stretching male die 13 are both connected with the male die connector 12 through bolts, and the gathering die 24 is connected with the upper die plate 21 through bolts.
When the tapered roller bearing retainer closing device is adopted, the upper die 2 moves towards the lower die 1, so that the closing surface 242 on the inner side of the closing die 24 extrudes the large-diameter ring frame 31 of the retainer 3, closing processing of the retainer 3 is realized, closing processing efficiency is high, and closing effect is good.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.
Claims (10)
1. A tapered roller bearing holder mouth gathering device, a machine tool having a machine tool table and a vertically movable machine tool slide, characterized in that the mouth gathering device comprises:
The lower die comprises a lower die plate, a male die connector and a stretching male die, wherein the lower die plate is mounted on a machine tool workbench, the male die connector is detachably fixed between the stretching male die and the lower die plate, and the top of the stretching male die is provided with a conical bearing surface matched with the inner wall of the retainer;
the upper die is annular and is located right above the lower die, the upper die comprises an upper die plate, a material returning base plate, a material returning plate and a mouth gathering female die, the upper die plate is mounted to a machine tool sliding block, the material returning base plate is detachably fixed between the material returning plate and the upper die plate, the mouth gathering female die is annular and fixed to the upper die plate, a conical extrusion surface matched with the outer wall of the retainer is arranged in the mouth gathering female die, a mouth gathering surface is formed below the conical extrusion surface, and the mouth gathering surface can extrude a large-diameter ring frame towards the center of the retainer.
2. The tapered roller bearing retainer lip device according to claim 1, wherein a guide cambered surface is arranged below the lip surface, and the tapered extrusion surface, the lip surface and the guide cambered surface are in smooth transition connection.
3. The tapered roller bearing retainer lip device as recited in claim 2, wherein surfaces of the tapered pressing face, the lip face, and the guide cambered face are coated with a teflon coating.
4. The tapered roller bearing retainer gathering device as recited in claim 1, wherein a gathering hoop is mounted on the outside of the gathering die, and the gathering hoop is sleeved on the outer wall of the gathering die.
5. The tapered roller bearing retainer closing device as recited in claim 1, wherein the retainer has a molded state and an unmolded state, and when the retainer is in the molded state, the retainer includes a large diameter ring frame, a small diameter ring frame, and a plurality of window beams connecting the large diameter ring frame and the small diameter ring frame, and a window hole for accommodating rolling bodies is formed between adjacent window beams;
When the retainer is in an unshaped state, the retainer further comprises a circular bottom plate, the small-diameter ring frame and the circular bottom plate form a bowl bottom of the retainer, and the circular bottom plate is provided with a central hole.
6. The tapered roller bearing retainer closing device as recited in claim 5, wherein when the closing device is used to manufacture the retainer in an unformed state, a center post is further fixed to the stretching male die, and a diameter of the center post is the same as a diameter of the center hole.
7. The tapered roller bearing retainer lip device as recited in claim 6, wherein the upper portion of the center post has external threads, the lower die further comprises a pressing plate, a threaded hole is formed in the inner side of the pressing plate and is matched with the external threads, and the pressing plate has a pressing surface pressed to the bowl bottom of the retainer.
8. The tapered roller bearing retainer closing device according to claim 1, wherein a material returning groove which is communicated with each other is formed between the material returning base plate and the material returning plate, a material returning cylinder is installed in the material returning groove, the material returning cylinder comprises a cylinder body and a push rod, the cylinder body is fixed to the material returning base plate, and the push rod is installed to the material returning plate.
9. The tapered roller bearing retainer lip device of claim 1, wherein a plurality of mounting holes are formed in both the lower die plate and the upper die plate.
10. The tapered roller bearing retainer lip device of claim 1, wherein the lower die plate and the stretching punch are both connected to the punch holder by bolts, and the lip die is connected to the upper die plate by bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420630345.4U CN222133207U (en) | 2024-03-28 | 2024-03-28 | Tapered roller bearing retainer closing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420630345.4U CN222133207U (en) | 2024-03-28 | 2024-03-28 | Tapered roller bearing retainer closing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222133207U true CN222133207U (en) | 2024-12-10 |
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ID=93732200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420630345.4U Active CN222133207U (en) | 2024-03-28 | 2024-03-28 | Tapered roller bearing retainer closing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222133207U (en) |
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2024
- 2024-03-28 CN CN202420630345.4U patent/CN222133207U/en active Active
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