CN216801971U - Tapping tool for flange threaded hole at inner end of diesel engine crankshaft - Google Patents
Tapping tool for flange threaded hole at inner end of diesel engine crankshaft Download PDFInfo
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- CN216801971U CN216801971U CN202123204379.2U CN202123204379U CN216801971U CN 216801971 U CN216801971 U CN 216801971U CN 202123204379 U CN202123204379 U CN 202123204379U CN 216801971 U CN216801971 U CN 216801971U
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- rotating rod
- flange
- threaded hole
- supporting seat
- square
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Abstract
The utility model discloses a tapping tool for a flange threaded hole at the inner end of a crankshaft of a diesel engine, which comprises a screw tap, a guide sleeve, a ratchet wrench, a rotating rod and a supporting seat, wherein one end of the screw tap is screwed into the threaded hole of the guide sleeve, one end of the guide sleeve is embedded into a counter bore at one end of the flange threaded hole at the inner end, and one end of the guide sleeve abuts against the bottom surface of the counter bore. The square handle at the other end of the screw tap is sleeved in one end of the rotating rod, the middle part of the rotating rod is sleeved in the head part of the ratchet wrench, the other end of the rotating rod is screwed into one end of the supporting seat, and the other end of the supporting seat abuts against the inner annular surface of the outer end flange of the crankshaft of the diesel engine. The utility model obviously improves the hole forming quality of the threaded holes of the inner end flange, obviously improves the processing efficiency of a plurality of threaded holes on the ring surface of the inner end flange and also greatly reduces the labor intensity of tapping.
Description
Technical Field
The utility model relates to a tapping tool, in particular to a tool for manually tapping a threaded hole in the flange end face of a crankshaft of a diesel engine, and belongs to the technical field of bench workers.
Background
The ring surface of the flange at the inner end of the crankshaft of the diesel engine is provided with a plurality of threaded holes for fixing the timing gear through screws, and because the flange at the outer end of the crankshaft end of the diesel engine is adjacent to the flange at the inner end, and the diameter of the flange at the outer end is greater than that of the flange at the inner end, the threaded holes on the ring surface of the flange at the inner end can not be tapped from the outer side of the flange at the outer end. The problem that the flexible tool handle cannot be used for tapping due to the fact that the operating space is small and the distance between the center of the threaded hole and the journal of the crankshaft of the diesel engine is short. If a rigid shank is used for tapping, tooth decay is easily generated in the threaded hole. The threaded holes on the ring surface of the flange at the inner end are large in quantity, the processing period is long, and even if a decayed threaded hole appears, the crankshaft of the diesel engine can be scrapped, so that huge loss is caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a tapping tool for a flange threaded hole at the inner end of a crankshaft of a diesel engine, which can ensure the processing quality of each threaded hole on the ring surface of the flange at the inner end.
The utility model is realized by the following technical scheme:
a tapping tool for flange threaded holes in the inner end of a crankshaft of a diesel engine comprises a screw tap, a guide sleeve, a ratchet wrench, a rotating rod and a supporting seat, wherein the ratchet wrench is a bidirectional ratchet wrench; the square handle at the other end of the screw tap is sleeved in one end of the rotating rod, the middle part of the rotating rod is sleeved in the head part of the ratchet wrench, the other end of the rotating rod is screwed into one end of the supporting seat, and the end face of the other end of the supporting seat abuts against the inner side ring surface of the outer end flange of the diesel engine crankshaft.
The purpose of the utility model is further realized by the following technical scheme:
furthermore, the rotating rod is of a stepped shaft structure and comprises a square handle sleeve at one end of the rotating rod, a middle square shaft adjacent to the square handle sleeve and a screw rod at the other end of the rotating rod, and the cross sections of the square handle sleeve, the middle square shaft and the screw rod are gradually reduced; the square handle at the other end of the screw tap is sleeved in the square counter bore at one end of the square handle sleeve, the middle square shaft is sleeved in the ratchet wheel square hole of the ratchet wheel wrench, and the end of the screw rod is screwed into one end of the supporting seat.
Furthermore, the screw thread turning direction of the screw tap is the same as the screw thread turning direction of the end of the screw rod, and the screw thread pitch of the screw tap is equal to the screw thread pitch of the screw rod.
Furthermore, the supporting seat is step-shaped, the end of the screw rod is screwed into a step-shaped small-end threaded hole of the supporting seat, a large-end counter bore is formed in the large end of the supporting seat, and the diameter of the large-end counter bore is larger than that of the small-end threaded hole.
Furthermore, the rotating rod is made of alloy tool steel, the overall hardening and tempering hardness of the rotating rod is HB 260-280, and the quenching hardness of the square counter bore and the middle square shaft is HRC 46-53.
The screw tap, the ratchet wrench and the supporting seat are connected into an integral structure through the rotating rod, and the threaded hole of the inner flange is tapped through the screw tap cutting part positioned in the guide sleeve. The utility model ensures that two ends of a combination body of the supporting seat, the ratchet wrench and the rotating rod are tensioned between the end surface of the flange at the inner end of the crankshaft and the inner end surface of the flange at the outer end of the adjacent crankshaft through the supporting seat abutting against the end surface of the flange at the outer end of the crankshaft. The utility model has compact structure and convenient use, can not generate a decayed threaded hole, obviously improves the hole forming quality of the inner flange threaded hole of the crankshaft of the diesel engine, obviously improves the processing efficiency of a circle of a plurality of threaded holes on the ring surface of the inner flange, and also greatly reduces the labor intensity of tapping.
The advantages and features of the utility model will be illustrated and explained by the following non-restrictive description of preferred embodiments, which are given by way of example only with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic view of the present invention installed between an inner end flange and an outer end flange of a diesel engine crankshaft;
FIG. 2 is an enlarged sectional view A-A of FIG. 1;
fig. 3 is an enlarged sectional view B-B of fig. 1.
Detailed Description
The utility model is further illustrated by the following figures and examples.
As shown in fig. 1 to 3, the utility model comprises a tap 1, a guide sleeve 2, a ratchet wrench 3, a rotating rod 4 and a support seat 5, wherein the ratchet wrench 3 is a bidirectional ratchet wrench, and can rotate clockwise to drive the tap 1 to tap, and rotate counterclockwise to enable the tap 1 to be separated from a threaded hole 611. The cutting part 11 at the left end of the tap 1 is screwed into the threaded hole 21 of the guide sleeve, the left end of the guide sleeve 2 is embedded into a counterbore 612 at the right end of the threaded hole 611 of the inner end flange 61, the excircle of the guide sleeve 2 is in clearance fit with the counterbore 612, and the left end head of the guide sleeve 2 abuts against the bottom surface of the counterbore 612. The guide sleeve 2 plays a role in accurately guiding the tapping of the tap 1 and ensures the perpendicularity of the axis of the threaded hole 611.
The square handle 12 of 1 right-hand member of screw tap embolias in 4 left ends of bull stick, and 4 middle parts of bull stick overlap in 3 heads of ratchet spanner, and 4 right-hand members of bull stick twist in 5 left ends of supporting seat, and 5 right-hand member terminal surfaces of supporting seat support and lean on the interior anchor ring of the outer end flange 62 of diesel engine bent axle 6, play the supporting role to the tapping of screw tap 1.
The rotating rod 4 is of a stepped shaft structure and comprises a square handle sleeve 41 at the left end, a middle square shaft 42 adjacent to the square handle sleeve 41 and a screw 43 at the left end of the rotating rod 4, wherein the cross sections of the square handle sleeve 41, the middle square shaft 42 and the screw 43 are gradually decreased. The square handle 12 at the right end of the tap 1 is sleeved in the square counter bore 411 at one end of the square handle sleeve 41, the middle square shaft 42 is sleeved in the ratchet square hole 31 of the ratchet wrench 3, and the end of the screw 43 is screwed into the left end of the support seat 5.
The screw thread direction of the tap 1 is the same as the screw thread direction of the end of the screw 43, the screw thread direction of the embodiment is left-hand, and the screw thread pitch of the tap is equal to the screw thread pitch. When the tap 1 rotates clockwise to tap and moves left, the supporting seat 5 moves right, so that the bottom surface of the supporting seat always abuts against the inner annular surface 621 of the outer end flange 62 of the diesel engine crankshaft 6, and the tapping of the tap 1 is firmly supported.
The supporting seat 5 is in a step shape, the end of the screw 43 is screwed into a small-end threaded hole 51 of the step-shaped supporting seat 5, a large-end counter bore 52 is formed in the large end of the supporting seat 5, and the diameter of the large-end counter bore 52 is larger than that of the small-end threaded hole 51. Such a structure may reduce its mass to facilitate installation.
The rotating rod 4 is made of alloy tool steel, the grade of the alloy tool steel is 40Cr, the whole hardening and tempering hardness of the rotating rod 4 is HB 260-280, the quenching hardness of the square counter bore 411 and the middle square shaft 42 is HRC 46-53, the durability of the rotating rod 4 is improved, and the service life of the rotating rod is prolonged.
The tapping process using the present invention is as follows:
1) the left end of the guide sleeve 2 is embedded into a counter bore 612 at the right end of a threaded hole 611 of an inner end flange 61 of the diesel crankshaft 6, and then the cutting part 11 at the left end of the tap 1 is screwed into the guide sleeve threaded hole 21.
2) A screw 43 at the right end of the rotating rod 4 penetrates through the ratchet wheel square hole 31, so that the middle square shaft 42 of the rotating rod 4 is sleeved in the ratchet wheel square hole 31, and the end face of the right end of the square handle sleeve 41 abuts against the end face of the upper end of the ratchet wheel wrench 3.
3) The end of the screw 43 is screwed into the left end of the support seat 5, the support seat 5 is rotated clockwise, and the distance L1 from the left end face of the square handle sleeve 42 to the right end face of the support seat 5 is adjusted, so that the sum of the distances L2 from the L1 to the end face of the square handle 12 at the right end of the tap 1 to the end face of the inner end flange 61 of the diesel crankshaft 6 is smaller than the distance L from the end face of the inner end flange 61 of the diesel crankshaft 6 to the inner end face of the outer end flange 62 of the adjacent diesel crankshaft 6, namely L1+ L2 < L, and the screw is convenient to install between the inner end flange 61 and the outer end flange 62.
4) After the square hole 411 at the left end of the square-handle sleeve 41 is sleeved on the square handle 12 at the right end of the screw tap 1, the supporting seat 5 is rotated anticlockwise, and the supporting seat 5 moves rightwards until the bottom surface of the supporting seat 5 abuts against the end surface of an outer end flange 62 of the diesel engine crankshaft 6. The square handle 12 at the right end of the screw tap 1 is sleeved in the square counter bore 411 at the left end of the square handle sleeve 41, so that two ends of a combination of the supporting seat 5, the ratchet wrench 3 and the rotating rod 4 are tightly tensioned between the end surface of the inner end flange 61 of the diesel engine crankshaft 6 and the end surface of the outer end flange 62 of the adjacent diesel engine crankshaft 6.
5) The handle part 32 of the ratchet wrench 3 is held by hand, the handle part 32 is rotated clockwise, and the cutting part 11 at the left end of the tap 1 rotates clockwise to complete tapping of the threaded hole of the inner end flange 61 of the diesel engine crankshaft 6. When the cutting part 11 at the left end of the screw tap 1 rotates clockwise for tapping, the supporting seat 5 moves outwards, and the bottom surface of the supporting seat 5 always abuts against the inner end surface of the outer end flange 62 of the diesel engine crankshaft 6.
6) The shank 32 of the ratchet wrench 3 is rotated counterclockwise, the cutting part 11 at the left end of the tap 1 is rotated counterclockwise to exit the threaded hole 611 where tapping is completed, and simultaneously the support 5 is moved inward, so that the combination of the tap 1 and the support 5, the ratchet wrench 3 and the rotary rod 4 can be disassembled.
In addition to the above embodiments, the present invention may have other embodiments, and any technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of the claims of the present invention.
Claims (5)
1. The tapping tool for the flange threaded hole in the inner end of the crankshaft of the diesel engine is characterized by comprising a screw tap, a guide sleeve, a ratchet wrench, a rotating rod and a supporting seat, wherein the ratchet wrench is a bidirectional ratchet wrench; the square handle at the other end of the screw tap is sleeved in one end of the rotating rod, the middle part of the rotating rod is sleeved in the head part of the ratchet wrench, the other end of the rotating rod is screwed into one end of the supporting seat, and the end face of the other end of the supporting seat abuts against the inner side ring surface of the outer end flange of the diesel engine crankshaft.
2. The tapping tool for the flange threaded hole at the inner end of the crankshaft of the diesel engine as claimed in claim 1, wherein the rotating rod is of a stepped shaft structure and comprises a square handle sleeve at one end of the rotating rod, a middle square shaft adjacent to the square handle sleeve and a screw rod at the other end of the rotating rod, and the cross sections of the square handle sleeve, the middle square shaft and the screw rod are gradually decreased; the square handle at the other end of the screw tap is sleeved in the square counter bore at one end of the square handle sleeve, the middle square shaft is sleeved in the ratchet wheel square hole of the ratchet wheel wrench, and the end of the screw rod is screwed into one end of the supporting seat.
3. The diesel engine crankshaft inner end flange threaded hole tapping tool as claimed in claim 2, wherein the screw tap has the same thread turning direction as the screw end, and the screw tap has the same thread pitch as the screw.
4. The tool for tapping the threaded hole of the flange at the inner end of the crankshaft of the diesel engine as claimed in claim 2, wherein the supporting seat is stepped, the end of the screw rod is screwed into the threaded hole at the small end of the stepped supporting seat, the large end of the supporting seat is provided with a large end counter bore, and the diameter of the large end counter bore is larger than that of the threaded hole at the small end.
5. The tapping tool for the flange threaded hole at the inner end of the diesel engine crankshaft as claimed in claim 2, wherein the rotating rod is made of alloy tool steel, the overall hardening and tempering hardness of the rotating rod is HB 260-280, and the hardening hardness of the square counter bore and the middle square shaft is HRC 46-53.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123204379.2U CN216801971U (en) | 2021-12-20 | 2021-12-20 | Tapping tool for flange threaded hole at inner end of diesel engine crankshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123204379.2U CN216801971U (en) | 2021-12-20 | 2021-12-20 | Tapping tool for flange threaded hole at inner end of diesel engine crankshaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216801971U true CN216801971U (en) | 2022-06-24 |
Family
ID=82053771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123204379.2U Active CN216801971U (en) | 2021-12-20 | 2021-12-20 | Tapping tool for flange threaded hole at inner end of diesel engine crankshaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216801971U (en) |
-
2021
- 2021-12-20 CN CN202123204379.2U patent/CN216801971U/en active Active
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