CN214920748U - Auxiliary tool for drilling central hole of crankshaft - Google Patents
Auxiliary tool for drilling central hole of crankshaft Download PDFInfo
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- CN214920748U CN214920748U CN202121343997.2U CN202121343997U CN214920748U CN 214920748 U CN214920748 U CN 214920748U CN 202121343997 U CN202121343997 U CN 202121343997U CN 214920748 U CN214920748 U CN 214920748U
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- shaft
- taper shank
- bearing
- ring
- crankshaft
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Abstract
The utility model relates to an assistive device for crankshaft center hole drilling, a hollow blind hole is processed at the center of the front end of a taper shank shaft, a step excircle is processed at the head excircle shaft, and a boss is arranged; the front end of the outer circular shaft at the head of the taper shank shaft is provided with a drilled threaded hole, and the central drill and the taper shank shaft are fixed by a set screw; the rear bearing is axially positioned through the boss of the outer circular shaft and the boss of the end cover, and the end cover is connected with the bearing sleeve through a screw; the front bearing is positioned through a boss and a check ring of the bearing sleeve; the taper shank is inserted in the taper shank of the spindle box of the machine tool, and the tailstock spindle of the machine tool is tightly matched with the taper shank. The utility model discloses can in time accomplish centre bore drilling work fast, centre bore precision is high behind the drilling, greatly reduced operator's intensity of labour to work efficiency has been improved.
Description
Technical Field
The utility model belongs to the technical field of bent axle appurtenance, concretely relates to assist utensil for bent axle bores centre bore.
Background
When a center hole is drilled in the existing crankshaft, firstly, a taper shank shaft 1 is inserted into a taper shank hole 14 of a main shaft of a tailstock of a machine tool, and is tightly matched with the taper shank hole of the main shaft 12 of the tailstock of the machine tool. The clamping jaws of the three-jaw chuck at the head of the machine tool are opened, so that the shaft neck at one end of the crankshaft can be smoothly placed in; the crankshaft is lifted and lightly placed on a machine tool, one end of the crankshaft is placed in a clamping jaw of a three-jaw chuck of the machine tool head to pre-clamp the crankshaft, the other end of the crankshaft is placed in a center frame, each supporting jaw of the center frame is adjusted to enable the axis of the crankshaft to be superposed with the axis of a main shaft of the machine tool, one end of the crankshaft is clamped through the three-jaw chuck clamping jaw, and each supporting jaw of the center frame at the other end is locked; and rotating the crankshaft, manually feeding and drilling the center hole auxiliary tool to drill the center hole, withdrawing and drilling the center hole auxiliary tool to measure the depth of the center hole, if the process requirement is not met, manually feeding and drilling the center hole auxiliary tool again to drill the center hole, withdrawing and drilling the center hole auxiliary tool again to measure the depth of the center hole, and repeatedly measuring and drilling until the depth of the center hole meets the process requirement. And moving the tailstock backwards, hanging the crane on the crankshaft, loosening the clamping jaws of the three-jaw chuck at the head of the machine tool, loosening the center frame, hanging the crankshaft, rotating by 180 degrees, placing the crankshaft on the three-jaw chuck at the head of the machine tool and the center frame, adjusting the three-jaw chuck at the head of the machine tool and the center frame to enable the axis of the crankshaft to coincide with the axis of a spindle of the machine tool, and clamping the three-jaw chuck at the head of the machine tool and the center frame. And rotating the crankshaft, repeatedly and manually feeding the auxiliary tool for drilling the central hole, then measuring, drilling again and measuring again until the depth of the central hole meets the technological requirements.
The prior auxiliary tool for drilling a center hole (see the attached figure 1 in particular) consists of a taper shank shaft 1, a set screw 6, a center drill 7, a machine tool spindle box 13 and a tailstock spindle 12. The taper shank shaft 1 is a shaft part, the tail part of the taper shank shaft is of a taper shank structure, and in order to ensure that the auxiliary tool for drilling the center hole has enough friction force in the processing process, the taper shank shaft 1 is required to be ensured to be tightly matched with a taper shank hole of a main shaft 12 of a machine tool tailstock in the processing process of the taper shank; a hollow blind hole is processed at the front end of the taper shank shaft 1, a central drill 7 is installed in the blind hole in a matched mode, a threaded hole is drilled in the outer circle of the taper shank shaft 1, a set screw 6 is installed in the threaded hole, and the central drill 7 and the taper shank shaft 1 are fixed together through the set screw 6.
The auxiliary tool for drilling the center hole is troublesome to operate, time-consuming and inconvenient to use. The human factor influences the error greatly, and the machining precision is poor, and intensity of labour is big.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem that exists, the utility model provides an assist utensil for bent axle bores centre bore, the utility model discloses a technical scheme as follows:
an assistive device for drilling a central hole of a crankshaft comprises a taper shank shaft 1, a screw 2, an end cover 3, a bearing sleeve 4, a felt ring 5, a set screw 6, a central drill 7, a retainer ring 8, a front bearing 9, a retainer sleeve 10, a rear bearing 11, a tailstock main shaft 12 and a machine tool main shaft box 13;
the taper shank shaft 1 is a shaft part, and the tail part of the taper shank shaft is of a taper shank structure;
a hollow blind hole is processed in the center of the front end of the taper shank shaft 1, and a central drill 7 is arranged in the blind hole in a matched mode;
a step excircle is processed at the head excircle shaft 15 of the taper shank shaft 1, and a boss 16 is arranged;
the front end of the outer round shaft 15 at the head of the taper shank shaft 1 is provided with a drilled threaded hole for installing a set screw 6; the excircle of the taper shank shaft 1 at the rear end of the threaded hole is provided with a shaft groove 18;
the central drill 7 and the taper shank shaft 1 are fixed together through a set screw 6;
the inner ring of the rear bearing 11 and the head of the taper shank shaft 1 are matched and positioned with the taper shank shaft 1 through an outer circular shaft 15, the inner ring of the rear bearing 11 is axially positioned through a boss 16, the outer ring of the rear bearing 11 is matched and positioned through a mounting hole 17 formed in a bearing sleeve 4, the inner ring is axially positioned through a boss of an end cover 3, the end cover 3 and the bearing sleeve 4 are matched and positioned through the mounting hole 17 and are connected through a screw 2;
the inner ring of the front bearing 9 and the head of the taper shank shaft 1 are matched and positioned with the taper shank shaft 1 through an outer circular shaft 15, and the outer ring of the front bearing 9 is positioned axially through a boss of the bearing sleeve 4; the inner rings of the front bearing 9 and the rear bearing 11 are axially positioned through a retaining sleeve 10; the front end of the inner ring of the front bearing 9 is axially positioned through a check ring 8, and the inner circle of the check ring 8 is clamped on the outer circle shaft 15 of the taper shank shaft 1 through a shaft groove 18 on the taper shank shaft 1;
the taper shank 14 is inserted into a taper shank of a machine tool spindle box 13, and a machine tool tailstock spindle 12 is tightly matched with the taper shank 14.
The auxiliary tool for drilling the central hole of the crankshaft has the preferred scheme that a felt ring 5 is installed at the inner hole of a bearing sleeve 4 at the front part of the taper shank shaft 1 in a matched mode;
the inner circle of the felt ring 5 is matched with the outer circle shaft 15 of the taper shank shaft 1; the auxiliary tool is used for preventing iron chips and dust from entering the bearing in the drilling process of the crankshaft center hole drilling auxiliary tool.
An operation method of an auxiliary tool for drilling a central hole of a crankshaft comprises the following steps: 1. adjusting the distance from the tip of the center drill 7 of the center hole drilling assistive device to the end surface 19 of the bearing sleeve 4 to the size required by the process;
2. inserting the taper shank shaft 1 into a taper shank hole 14 of a main shaft of a tailstock of a machine tool, and enabling the taper shank shaft to be tightly matched with the taper shank hole of the main shaft 12 of the tailstock of the machine tool;
3. opening the clamping jaws of the three-jaw chuck at the head of the machine tool, enabling a shaft neck at one end of a crankshaft to be smoothly placed in the three-jaw chuck, hoisting the crankshaft to be lightly placed on the machine tool, enabling one end of the crankshaft to be placed in the three-jaw chuck at the head of the machine tool, pre-clamping the crankshaft, placing the other end of the crankshaft in a center frame, adjusting each supporting jaw of the center frame to enable the axis of the crankshaft to be superposed with the axis of a main shaft of the machine tool, clamping one end of the crankshaft through the three-jaw chuck, and locking each supporting jaw of the center frame at the other end;
4. rotating the crankshaft, and manually feeding the auxiliary tool for drilling the central hole to drill the central hole until the bearing sleeve 4 starts to rotate;
5. moving the tailstock backwards, hanging the crane on the crankshaft, loosening the clamping jaws of the three-jaw chuck at the head of the machine tool, loosening the center frame, hanging the crankshaft, rotating by 180 degrees, placing the crankshaft on the three-jaw chuck at the head of the machine tool and the center frame, adjusting the three-jaw chuck at the head of the machine tool and the center frame to enable the axis of the crankshaft to be superposed with the axis of a spindle of the machine tool, and clamping the three-jaw chuck at the head of the machine tool and the center frame;
6. and rotating the crankshaft, and manually feeding the auxiliary tool for drilling the central hole to drill the central hole until the bearing sleeve 4 starts to rotate.
The utility model has the advantages that: the utility model discloses simple structure makes portably, convenient to use's bent axle bores centre bore and assists the utensil. The auxiliary tool can complete center hole drilling work timely and quickly, the accuracy of the drilled center hole is high, the labor intensity of an operator is greatly reduced, and the working efficiency is improved. The problems of large error, poor machining precision and high labor intensity caused by human factors are solved.
Drawings
FIG. 1 is a prior art center hole drilling aid;
FIG. 2 is a schematic view A-A of FIG. 1;
FIG. 3 is a view of the present novel center hole drilling aid;
fig. 4 is a schematic view a-a of fig. 3.
In the figure, 1-taper shank shaft, 2-screw, 3-end cover, 4-bearing sleeve, 5-felt ring, 6-set screw, 7-center drill, 8-retainer ring, 9-front bearing, 10-retaining sleeve, 11-rear bearing, 12-tailstock main shaft, 13-machine tool main shaft box, 14-taper shank, 15-outer circular shaft, 16-boss, 17-mounting hole, 18-shaft groove and 19-end surface.
Detailed Description
As shown in fig. 3-4, an assistive device for drilling a central hole of a crankshaft comprises a taper shank shaft 1, a screw 2, an end cover 3, a bearing sleeve 4, a felt ring 5, a set screw 6, a central drill 7, a retainer ring 8, a front bearing 9, a retainer sleeve 10, a rear bearing 11, a tailstock main shaft 12 and a machine tool main shaft box 13;
the taper shank shaft 1 is a shaft part, and the tail part of the taper shank shaft is of a taper shank structure;
a hollow blind hole is processed in the center of the front end of the taper shank shaft 1, and a central drill 7 is arranged in the blind hole in a matched mode;
a step excircle is processed at the head excircle shaft 15 of the taper shank shaft 1, and a boss 16 is arranged;
the front end of the outer round shaft 15 at the head of the taper shank shaft 1 is provided with a drilled threaded hole for installing a set screw 6; the excircle of the taper shank shaft 1 at the rear end of the threaded hole is provided with a shaft groove 18;
the central drill 7 and the taper shank shaft 1 are fixed together through a set screw 6;
the inner ring of the rear bearing 11 and the head of the taper shank shaft 1 are matched and positioned with the taper shank shaft 1 through an outer circular shaft 15, the inner ring of the rear bearing 11 is axially positioned through a boss 16, the outer ring of the rear bearing 11 is matched and positioned through a mounting hole 17 formed in a bearing sleeve 4, the inner ring is axially positioned through a boss of an end cover 3, the end cover 3 and the bearing sleeve 4 are matched and positioned through the mounting hole 17 and are connected through a screw 2;
the inner ring of the front bearing 9 and the head of the taper shank shaft 1 are matched and positioned with the taper shank shaft 1 through an outer circular shaft 15, and the outer ring of the front bearing 9 is positioned axially through a boss of the bearing sleeve 4; the inner rings of the front bearing 9 and the rear bearing 11 are axially positioned through a retaining sleeve 10; the front end of the inner ring of the front bearing 9 is axially positioned through a check ring 8, and the inner circle of the check ring 8 is clamped on the outer circle shaft 15 of the taper shank shaft 1 through a shaft groove 18 on the taper shank shaft 1;
the taper shank 14 is inserted into a taper shank of a machine tool spindle box 13, and a machine tool tailstock spindle 12 is tightly matched with the taper shank 14.
A felt ring 5 is arranged at the inner hole of the bearing sleeve 4 at the front part of the taper shank shaft 1 in a matching way;
the inner circle of the felt ring 5 is matched with the outer circle shaft 15 of the taper shank shaft 1; the auxiliary tool is used for preventing iron chips and dust from entering the bearing in the drilling process of the crankshaft center hole drilling auxiliary tool.
An operation method of an auxiliary tool for drilling a central hole of a crankshaft comprises the following steps: 1. adjusting the distance from the tip of the center drill 7 of the center hole drilling assistive device to the end surface 19 of the bearing sleeve 4 to the size required by the process;
2. inserting the taper shank shaft 1 into a taper shank hole 14 of a main shaft of a tailstock of a machine tool, and enabling the taper shank shaft to be tightly matched with the taper shank hole of the main shaft 12 of the tailstock of the machine tool;
3. opening the clamping jaws of the three-jaw chuck at the head of the machine tool, enabling a shaft neck at one end of a crankshaft to be smoothly placed in the three-jaw chuck, hoisting the crankshaft to be lightly placed on the machine tool, enabling one end of the crankshaft to be placed in the three-jaw chuck at the head of the machine tool, pre-clamping the crankshaft, placing the other end of the crankshaft in a center frame, adjusting each supporting jaw of the center frame to enable the axis of the crankshaft to be superposed with the axis of a main shaft of the machine tool, clamping one end of the crankshaft through the three-jaw chuck, and locking each supporting jaw of the center frame at the other end;
4. rotating the crankshaft, and manually feeding the auxiliary tool for drilling the central hole to drill the central hole until the bearing sleeve 4 starts to rotate;
5. moving the tailstock backwards, hanging the crane on the crankshaft, loosening the clamping jaws of the three-jaw chuck at the head of the machine tool, loosening the center frame, hanging the crankshaft, rotating by 180 degrees, placing the crankshaft on the three-jaw chuck at the head of the machine tool and the center frame, adjusting the three-jaw chuck at the head of the machine tool and the center frame to enable the axis of the crankshaft to be superposed with the axis of a spindle of the machine tool, and clamping the three-jaw chuck at the head of the machine tool and the center frame;
6. and rotating the crankshaft, and manually feeding the auxiliary tool for drilling the central hole to drill the central hole until the bearing sleeve 4 starts to rotate.
Claims (2)
1. The utility model provides an assist utensil for bent axle bores centre bore which characterized in that: the device comprises a taper shank shaft, a screw, an end cover, a bearing sleeve, a felt ring, a set screw, a central drill, a retainer ring, a front bearing, a retaining sleeve, a rear bearing, a tailstock main shaft and a machine tool main shaft box;
the taper shank shaft is a shaft part, and the tail part of the taper shank shaft is of a taper shank structure;
a hollow blind hole is processed in the center of the front end of the taper shank shaft, and a central drill is installed in the blind hole in a matched mode;
a step excircle is processed at the head excircle shaft of the taper shank shaft, and a boss is arranged;
the front end of the outer circular shaft at the head of the taper shank shaft is provided with a drilled threaded hole for mounting a set screw; a shaft groove is arranged on the excircle of the taper shank shaft at the rear end of the threaded hole;
fixing the central drill and the taper shank shaft together through a set screw;
the rear bearing inner ring and the head of the taper shank shaft are matched and positioned through the excircle shaft and the taper shank shaft, the rear bearing inner ring is axially positioned through the boss, the rear bearing outer ring is matched and positioned through the mounting hole formed in the bearing sleeve, the rear bearing inner ring is axially positioned through the boss of the end cover, and the end cover and the bearing sleeve are matched and positioned through the mounting hole and are connected through the screw;
the front bearing inner ring and the head of the taper shank shaft are matched and positioned with the taper shank shaft through the outer circular shaft, and the front bearing outer ring is positioned axially through the boss of the bearing sleeve; the front bearing and the inner ring of the rear bearing are axially positioned through a retaining sleeve; the front end of the inner ring of the front bearing is axially positioned through a check ring, and the inner circle of the check ring is clamped on the outer circle shaft of the taper shank shaft through a shaft groove on the taper shank shaft;
the taper shank is inserted into the taper shank of the spindle box of the machine tool, and the spindle of the tailstock of the machine tool is tightly matched with the taper shank.
2. An aid for drilling a central bore in a crankshaft as claimed in claim 1, wherein: a felt ring is arranged at the inner hole of the bearing sleeve at the front part of the taper shank shaft in a matching way; the inner circle of the felt ring is matched with the outer circle shaft of the taper shank shaft; the auxiliary tool is used for preventing iron chips and dust from entering the bearing in the drilling process of the crankshaft center hole drilling auxiliary tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121343997.2U CN214920748U (en) | 2021-06-17 | 2021-06-17 | Auxiliary tool for drilling central hole of crankshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121343997.2U CN214920748U (en) | 2021-06-17 | 2021-06-17 | Auxiliary tool for drilling central hole of crankshaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214920748U true CN214920748U (en) | 2021-11-30 |
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ID=79051430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121343997.2U Active CN214920748U (en) | 2021-06-17 | 2021-06-17 | Auxiliary tool for drilling central hole of crankshaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214920748U (en) |
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2021
- 2021-06-17 CN CN202121343997.2U patent/CN214920748U/en active Active
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