CN215697666U - Punch press for forging bicycle hub - Google Patents
Punch press for forging bicycle hub Download PDFInfo
- Publication number
- CN215697666U CN215697666U CN202121051223.2U CN202121051223U CN215697666U CN 215697666 U CN215697666 U CN 215697666U CN 202121051223 U CN202121051223 U CN 202121051223U CN 215697666 U CN215697666 U CN 215697666U
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- forging
- machine body
- stamping die
- crank
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- 238000005242 forging Methods 0.000 title claims abstract description 31
- 238000003825 pressing Methods 0.000 claims abstract description 13
- 238000004080 punching Methods 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 10
- 230000035939 shock Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 2
- 244000309464 bull Species 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012163 sequencing technique Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Abstract
The utility model discloses a punch press for forging a hub of a bicycle, which comprises a machine body, wherein a throat is formed in the front side of the machine body, a sliding block is arranged above the throat in a sliding manner, a forging mechanism is arranged at the bottom of the sliding block, a punching mechanism is arranged at the top of the sliding block, the forging mechanism comprises a bottom plate, the bottom plate is fixedly connected with the bottom of the sliding block, a pressing plate is fixedly arranged at the bottom of the bottom plate through bolts, an adjusting plate is arranged between the pressing plate and the bottom plate, and the adjusting plate is in sliding connection with the pressing plate and the bottom plate. According to the utility model, the up-and-down movement of the slider is controlled by the crank connecting rod to drive the up-and-down movement of the adjusting plate, the flower drum is stamped and forged, the positions of the first stamping die, the second stamping die and the third stamping die are changed by the left-and-right movement of the adjusting plate, three times of processing and forging of different procedures are completed, a large amount of working time is saved, the labor intensity of workers is reduced, the working efficiency is high, and the production speed is high.
Description
Technical Field
The utility model relates to the technical field of hub forging, in particular to a punch press for bicycle hub forging.
Background
The flower-drum is one of the most important indispensable parts of constitution bicycle, has iron flower-drum and aluminium flower-drum, and the iron flower-drum is the bicycle flower-drum of riding at general family, and the aluminium flower-drum generally is the flower-drum of comparatively high-grade, and as the flower-drum of types such as bicycle, performance car, highway car, the flower-drum is used for controlling whether the bicycle can walk smoothly, and the effect and the factor of safety of riding of bicycle are directly decided to the good or bad of its quality.
When the hub is processed and produced, the aluminum bar needs to be punched and forged for multiple times, but when the hub is forged by the existing punch, one type of punch can only finish one-time punching and forging, so that the aluminum bar needs to be placed on different punches to be processed for multiple times, a large amount of time is wasted due to repeated operation, the labor intensity is improved, the working efficiency is low, and the production speed is low.
Therefore, it is necessary to provide a punch press for forging bicycle hubs to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a punch press for forging a bicycle hub, which is characterized in that a slider is controlled by a crank connecting rod to move up and down to drive an adjusting plate to move up and down, so that the hub in an inner template is stamped and forged, and positions of a first stamping die, a second stamping die and a third stamping die are changed by the left and right movement of the adjusting plate, so that three times of processing and forging in different processes are completed, a large amount of working time is saved, the labor intensity of workers is reduced, the working efficiency is high, the production speed is high, and the defects in the technology are overcome.
In order to achieve the above purpose, the utility model provides the following technical scheme: a punch press for forging a hub of a bicycle comprises a machine body, wherein a throat is formed in the front side of the machine body, a sliding block is arranged on the machine body above the throat in a sliding mode, a forging mechanism is arranged at the bottom of the sliding block, and a punching mechanism is arranged at the top of the sliding block;
the forging mechanism comprises a bottom plate, the bottom plate is fixedly connected with the bottom of a sliding block, a pressing plate is fixedly arranged at the bottom of the bottom plate through bolts, an adjusting plate is arranged between the pressing plate and the bottom plate, the adjusting plate is connected with the pressing plate and the bottom plate in a sliding mode, a first stamping die, a second stamping die and a third stamping die are arranged in the adjusting plate, a first oil hydraulic cylinder is arranged on the front side surface of the bottom plate, an idle cylinder is arranged on the rear side surface of the bottom plate, the output end of the idle cylinder is fixedly connected with the adjusting plate, and a positioning mechanism is arranged on the top surface of the machine body below the adjusting plate;
the positioning mechanism comprises a base plate, the base plate is fixed to the surface of the top of the machine body below the adjusting plate, an outer template is fixedly arranged at the top of the base plate through bolts, an inner template is arranged inside the outer template, a positioning block is arranged at the bottom of the inner template in a sliding mode, a sequencing die sleeve is arranged at the top of the inner template, an annular plate is arranged on the outer side of the sequencing die sleeve, a hollow stand column is arranged inside the base plate, a jacking plate is arranged inside the hollow stand column in a sliding mode, and a second oil hydraulic cylinder is arranged inside the machine body.
Preferably, the punching press mechanism includes the connecting rod, the connecting rod bottom is established inside the slider, the connecting rod top outside is equipped with the crank, the crank outside is equipped with the transmission shaft, the fuselage is located the throat top and keeps away from articulate one side and is equipped with the motor, the motor output outside is equipped with the belt pulley, the belt pulley bottom is equipped with the flywheel through belt drive, the inside bull stick that is equipped with of flywheel, the bull stick is close to articulate one end and is equipped with first bevel gear, first bevel gear top is equipped with the second bevel gear that can intermeshing, second bevel gear establishes and keeps away from articulate one end outside at the transmission shaft.
Preferably, the first stamping die, the second stamping die and the third stamping die are uniformly arranged on the bottom surface of the adjusting plate in a straight line shape, and the cross section of the adjusting plate is T-shaped.
Preferably, the bottom of the hollow upright post is fixedly provided with a sealing cover through a bolt, and the output end of the second oil hydraulic cylinder penetrates through the sealing cover and is in sliding connection with the sealing cover.
Preferably, the annular plate is fixedly connected with the outer template through a bolt, the hollow upright post is fixedly connected with the outer template through a bolt, and the output end of the second oil hydraulic cylinder is fixedly connected with the bottom of the ejector plate.
Preferably, the one end that the flywheel was kept away from to the transmission shaft extends to the fuselage inside and passes through the bearing rotation with the fuselage and be connected, the transmission shaft outside is equipped with the bearing plate through the bearing rotation, the bearing plate is established between crank and second bevel gear, bearing plate top and fuselage fixed connection.
Preferably, one end of the rotating rod, which is far away from the crank, extends into the machine body and is rotationally connected with the machine body through a bearing, a vertical plate is rotationally arranged on the outer surface of the rotating rod through the bearing, the vertical plate is arranged between the first bevel gear and the flywheel, and the bottom of the vertical plate is fixedly connected with the machine body.
Preferably, a clutch is arranged on one side of the flywheel close to the first bevel gear.
Preferably, four corners of the bottom of the machine body are fixedly provided with shock pads.
In the technical scheme, the utility model provides the following technical effects and advantages:
when the device is actually used, the up-and-down movement of the slider is controlled through the crank connecting rod to drive the up-and-down movement of the adjusting plate, the hub inside the inner template is stamped and forged, and meanwhile, the positions of the first stamping die, the second stamping die and the third stamping die are changed through the left-and-right movement of the adjusting plate, so that the machining and forging of three different procedures are completed.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a left side view of the present invention;
FIG. 3 is an enlarged view of the portion A of FIG. 1 according to the present invention;
FIG. 4 is an enlarged view of the portion B of FIG. 2 according to the present invention.
Description of reference numerals:
the stamping die comprises a machine body 1, a throat 2, a sliding block 3, a bottom plate 41, a pressing plate 42, an adjusting plate 43, a first stamping die 44, a second stamping die 45, a third stamping die 46, a first oil hydraulic cylinder 47, a hollow cylinder 48, a base plate 51, an outer template 52, an inner template 53, a positioning block 54, a die sleeve 55, an annular plate 56, a hollow upright 57, a material ejecting plate 58, a second oil hydraulic cylinder 59, a connecting rod 61, a crank 62, a transmission shaft 63, a motor 64, a belt pulley 65, a flywheel 66, a rotating rod 67, a first bevel gear 68, a second bevel gear 69, a sealing cover 7, a bearing plate 8, a vertical plate 9, a clutch 10 and a shock pad 11.
Detailed Description
In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.
The utility model provides a punch press for forging a bicycle hub, which comprises a machine body 1, wherein a throat 2 is formed in the front side of the machine body 1, a sliding block 3 is arranged on the machine body 1 above the throat 2 in a sliding manner, a forging mechanism is arranged at the bottom of the sliding block 3, and a punching mechanism is arranged at the top of the sliding block 3;
the forging mechanism comprises a bottom plate 41, the bottom plate 41 is fixedly connected with the bottom of the sliding block 3, a pressing plate 42 is fixedly arranged at the bottom of the bottom plate 41 through bolts, an adjusting plate 43 is arranged between the pressing plate 42 and the bottom plate 41, the adjusting plate 43 is in sliding connection with the pressing plate 42 and the bottom plate 41, a first stamping die 44, a second stamping die 45 and a third stamping die 46 are arranged inside the adjusting plate 43, a first oil hydraulic cylinder 47 is arranged on the front side surface of the bottom plate 41, an air hydraulic cylinder 48 is arranged on the rear side surface of the bottom plate 41, the output end of the air hydraulic cylinder 48 is fixedly connected with the adjusting plate 43, and a positioning mechanism is arranged on the top surface of the machine body 1 below the adjusting plate 43;
positioning mechanism includes backing plate 51, backing plate 51 is located the top surface of regulating plate 43 below with fuselage 1 and fixes mutually, backing plate 51 top is equipped with exterior sheathing 52 through the bolt fastening, the inside interior sheathing 53 that is equipped with of exterior sheathing 52, interior sheathing 53 slides in the bottom and is equipped with locating piece 54, interior sheathing 53 top is equipped with preface die sleeve 55, the preface die sleeve 55 outside is equipped with annular slab 56, the inside hollow stand 57 that is equipped with of backing plate 51, the inside slip of hollow stand 57 is equipped with kicking plate 58, the inside second oil pressure jar 59 that is equipped with of fuselage 1.
Further, in the above technical solution, the first stamping die 44, the second stamping die 45 and the third stamping die 46 are uniformly arranged on the bottom surface of the adjusting plate 43 in a straight line shape, so that the positions of the first stamping die 44, the second stamping die 45 and the third stamping die 46 can be conveniently changed, and the cross section of the adjusting plate 43 is set to be T-shaped, so that the stability of the adjusting plate 43 during sliding is better.
Further, in the above technical solution, the bottom of the hollow upright 57 is fixedly provided with a sealing cover 7 through a bolt, and the output end of the second oil hydraulic cylinder 59 penetrates through the sealing cover 7 and is slidably connected with the sealing cover 7, so as to provide a limit for the ejector plate 58, avoid an excessively large downward sliding stroke, and ensure the smoothness of use.
Further, in the above technical solution, the annular plate 56 is fixedly connected with the outer die plate 52 through bolts, the hollow column 57 is fixedly connected with the outer die plate 52 through bolts, so that the annular plate 56, the hollow column 57 and the outer die plate 52 can be conveniently mounted and dismounted, one of the damaged parts can be replaced at will, and the output end of the second oil hydraulic cylinder 59 is fixedly connected with the bottom of the ejector plate 58, so that the machined and forged workpiece can be conveniently ejected.
Further, in the above technical scheme, the one end that flywheel 66 was kept away from to transmission shaft 63 extends to the fuselage 1 inside and is connected through the bearing rotation with fuselage 1, transmission shaft 63 rotates through the bearing and is equipped with bearing plate 8 in the outside, provides a strong point for transmission shaft 63, guarantees its stability, bearing plate 8 is established between crank 62 and second bevel gear 69, bearing plate 8 top and fuselage 1 fixed connection.
Further, in the above technical solution, one end of the rotating rod 67, which is far away from the crank 62, extends into the machine body 1 and is rotatably connected with the machine body 1 through a bearing, the outer surface of the rotating rod 67 is rotatably provided with a vertical plate 9 through a bearing, so as to provide a supporting point for the rotating rod 67 and ensure the stability of the rotating rod, the vertical plate 9 is arranged between the first bevel gear 68 and the flywheel 66, and the bottom of the vertical plate 9 is fixedly connected with the machine body 1.
Further, in the above technical solution, the clutch 10 is provided on the side of the flywheel 66 close to the first bevel gear 68, which facilitates the use of the device.
Furthermore, in the above technical scheme, shock absorbing pads 11 are fixedly arranged at four corners of the bottom of the machine body 1, so that the vibration of the device during use is reduced, and the service life of the device is prolonged.
The implementation mode is specifically as follows: when the utility model is used, a worker puts a hub workpiece to be forged into the inner die plate 53 and contacts with the top of the positioning block 54, the positioning block 54 is positioned at the bottom of the inner die plate 53 under the action of gravity, the motor 64 is started, the output end of the motor 64 rotates to drive the belt pulley 65 to rotate, further the flywheel 66 is driven to rotate through the belt, the rotating rod 67 is further driven to rotate, the first bevel gear 68 starts to rotate, the second bevel gear 69 further drives the transmission shaft 63 to rotate, the crank 62 rotates up and down, the crank drives the connecting rod 61 to follow, the connecting rod 61 drives the slider 3 to move downwards, the bottom plate 41 moves downwards along with the slider 3, the adjusting plate 43 moves downwards along with the bottom plate 41, the first stamping die 44 is driven to move downwards, the hub workpiece in the annular plate 56 is stamped and forged, the crank 62 continues to rotate, the slide block 3 starts to move upwards under the transmission of the crank 62, at this time, the pneumatic cylinder 48 starts to push the adjusting plate 43 to slide rightwards, the drawing of fig. 2 in the drawing description is taken as a view, at the same time, the output end of the first hydraulic cylinder 47 extends out for a predetermined distance, when the first stamping die 44 moves upwards to the initial height, the second stamping die 45 slides rightwards to the right above the hub workpiece under the push of the pneumatic cylinder 48 and the limit of the output end of the first hydraulic cylinder 47, and stops moving, the crank 62 continues to rotate, the slide block 3 starts to move downwards under the transmission of the crank 62, drives the second stamping die 45 to move downwards, performs two-step stamping forging on the hub workpiece, the crank 62 continues to rotate, the slide block 3 starts to move upwards under the transmission of the crank 62, at this time, the first hydraulic cylinder 47 contracts for a predetermined distance, and at the same time, the pneumatic cylinder 48 pushes the adjusting plate 43 to slide rightwards again, when the second stamping die 45 moves upwards to the initial height, the third stamping die 46 slides rightwards to the position right above the hub workpiece and stops moving under the pushing of the hollow cylinder 48, the crank 62 continues to rotate, the slide block 3 starts to move upwards under the driving of the crank 62, at this time, the first hydraulic cylinder 47 outputs and contracts for a predetermined distance, the hollow cylinder 48 pushes the adjusting plate 43 to slide rightwards again, at the same time, the hollow cylinder 48 pushes the adjusting plate 43 to slide rightwards again, when the second stamping die 45 moves upwards to the initial height, the third stamping die 46 slides rightwards to the position right above the hub workpiece and stops moving under the pushing of the hollow cylinder 48, the crank 62 continues to rotate, the slide block 3 starts to move upwards under the driving of the crank 62, at this time, the second hydraulic cylinder 59 starts to work, the output end moves upwards to drive the ejector plate 58 to move upwards, and further drive the positioning block 54 to slide upwards, so that the hub workpiece is exposed at the top of the progressive die sleeve 55, meanwhile, the pneumatic cylinder 48 contracts to drive the adjusting plate 43 to slide leftwards to an initial position, the first oil hydraulic cylinder 59 contracts and resets, the motor 64 stops working, a worker takes out a forged hub workpiece to be placed at a collecting position, the output end of the second oil hydraulic cylinder 59 resets, a new hub workpiece to be machined and forged is placed again at the moment and circulates sequentially, and therefore one-time forging of three processes of a large number of hub workpieces is completed.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the utility model. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the utility model.
Claims (9)
1. The utility model provides a bicycle flower-drum forges uses punch press, includes fuselage (1), its characterized in that: a throat (2) is formed in the front side of the machine body (1), a sliding block (3) is arranged above the throat (2) of the machine body (1) in a sliding mode, a forging mechanism is arranged at the bottom of the sliding block (3), and a punching mechanism is arranged at the top of the sliding block (3);
the forging mechanism comprises a bottom plate (41), the bottom plate (41) is fixedly connected with the bottom of a sliding block (3), a pressing plate (42) is fixedly arranged at the bottom of the bottom plate (41) through bolts, an adjusting plate (43) is arranged between the pressing plate (42) and the bottom plate (41), the adjusting plate (43) is in sliding connection with the pressing plate (42) and the bottom plate (41), a first stamping die (44), a second stamping die (45) and a third stamping die (46) are arranged inside the adjusting plate (43), a first oil hydraulic cylinder (47) is arranged on the front side surface of the bottom plate (41), an idle cylinder (48) is arranged on the rear side surface of the bottom plate (41), the output end of the idle cylinder (48) is fixedly connected with the adjusting plate (43), and a positioning mechanism is arranged on the top surface, located below the adjusting plate (43), of the machine body (1);
positioning mechanism includes backing plate (51), backing plate (51) are located the top surface of regulating plate (43) below with fuselage (1) and are fixed mutually, backing plate (51) top is equipped with exterior sheathing (52) through the bolt fastening, exterior sheathing (52) inside is equipped with interior sheathing (53), interior sheathing (53) bottom slides and is equipped with locating piece (54), interior sheathing (53) top is equipped with preface die sleeve (55), preface die sleeve (55) outside is equipped with annular plate (56), backing plate (51) inside is equipped with hollow stand (57), the inside slip of hollow stand (57) is equipped with kicking plate (58), fuselage (1) inside is equipped with second oil hydraulic cylinder (59).
2. The press for forging a bicycle hub as claimed in claim 1, wherein: the stamping mechanism comprises a connecting rod (61), the bottom end of the connecting rod (61) is arranged inside a sliding block (3), a crank (62) is arranged on the outer side of the top end of the connecting rod (61), a transmission shaft (63) is arranged on the outer side of the crank (62), one side, located above a throat (2), of the machine body (1) and far away from the crank (62) is provided with a motor (64), a belt pulley (65) is arranged on the outer side of the output end of the motor (64), a flywheel (66) is arranged at the bottom of the belt pulley (65) through belt transmission, a rotating rod (67) is arranged inside the flywheel (66), a first bevel gear (68) is arranged at one end, close to the crank (62), of the rotating rod (67), a second bevel gear (69) capable of being meshed with each other is arranged at the top of the first bevel gear (68), and the second bevel gear (69) is arranged on the outer side, far away from the crank (62), of the transmission shaft (63).
3. The press for forging a bicycle hub as claimed in claim 1, wherein: the first stamping die (44), the second stamping die (45) and the third stamping die (46) are uniformly arranged on the bottom surface of the adjusting plate (43) in a straight line shape, and the cross section of the adjusting plate (43) is set to be T-shaped.
4. The press for forging a bicycle hub as claimed in claim 1, wherein: the bottom of the hollow upright post (57) is fixedly provided with a sealing cover (7) through a bolt, and the output end of the second oil hydraulic cylinder (59) penetrates through the sealing cover (7) and is in sliding connection with the sealing cover (7).
5. The press for forging a bicycle hub as claimed in claim 1, wherein: the annular plate (56) is fixedly connected with the outer template (52) through bolts, the hollow upright column (57) is fixedly connected with the outer template (52) through bolts, and the output end of the second oil hydraulic cylinder (59) is fixedly connected with the bottom of the ejector plate (58).
6. The press for forging a bicycle hub as set forth in claim 2, wherein: one end that flywheel (66) were kept away from in transmission shaft (63) extends to fuselage (1) inside and is connected through the bearing rotation with fuselage (1), transmission shaft (63) outside is equipped with bearing plate (8) through the bearing rotation, establish between crank (62) and second bevel gear (69) bearing plate (8), bearing plate (8) top and fuselage (1) fixed connection.
7. The press for forging a bicycle hub as set forth in claim 2, wherein: one end, far away from the crank (62), of the rotating rod (67) extends to the inside of the machine body (1) and is rotationally connected with the machine body (1) through a bearing, a vertical plate (9) is rotationally arranged on the outer side surface of the rotating rod (67) through the bearing, the vertical plate (9) is arranged between the first bevel gear (68) and the flywheel (66), and the bottom of the vertical plate (9) is fixedly connected with the machine body (1).
8. The press for forging a bicycle hub as set forth in claim 2, wherein: and a clutch (10) is arranged on one side of the flywheel (66) close to the first bevel gear (68).
9. The press for forging a bicycle hub as claimed in claim 1, wherein: four corners of the bottom of the machine body (1) are fixedly provided with shock pads (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121051223.2U CN215697666U (en) | 2021-05-17 | 2021-05-17 | Punch press for forging bicycle hub |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121051223.2U CN215697666U (en) | 2021-05-17 | 2021-05-17 | Punch press for forging bicycle hub |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215697666U true CN215697666U (en) | 2022-02-01 |
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ID=80031642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121051223.2U Active CN215697666U (en) | 2021-05-17 | 2021-05-17 | Punch press for forging bicycle hub |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215697666U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113042671A (en) * | 2021-05-17 | 2021-06-29 | 雅瑟斯精密机械(江苏)有限公司 | Punch press for forging bicycle hub and using method thereof |
-
2021
- 2021-05-17 CN CN202121051223.2U patent/CN215697666U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113042671A (en) * | 2021-05-17 | 2021-06-29 | 雅瑟斯精密机械(江苏)有限公司 | Punch press for forging bicycle hub and using method thereof |
| CN113042671B (en) * | 2021-05-17 | 2024-10-15 | 雅瑟斯精密机械(江苏)有限公司 | Punch press for forging bicycle hub and use method thereof |
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