CN212351865U - Marine diesel gear mandrel tightening tool - Google Patents
Marine diesel gear mandrel tightening tool Download PDFInfo
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- CN212351865U CN212351865U CN202021709691.XU CN202021709691U CN212351865U CN 212351865 U CN212351865 U CN 212351865U CN 202021709691 U CN202021709691 U CN 202021709691U CN 212351865 U CN212351865 U CN 212351865U
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- marine diesel
- round nut
- nut
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- outer hexagonal
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- 230000006835 compression Effects 0.000 claims abstract description 28
- 238000007906 compression Methods 0.000 claims abstract description 28
- 238000003466 welding Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 210000000080 chela (arthropods) Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model discloses a frock is screwed up to marine diesel gear mandrel, include the round nut subassembly and outer hexagonal clamp bolt that constitute by special round nut and welded fastening's outer hexagon nut on its one side, outer hexagon nut's internal thread is less than the internal thread of special round nut, and outer hexagon nut's axial lead is coaxial with the axial lead of special round nut. The outer hexagonal compression bolt is screwed into the outer hexagonal nut and extends into the special round nut, and the end head of the outer hexagonal compression bolt is tightly pressed on the end face of the other threaded end of the marine diesel engine gear spindle. The utility model discloses the structure is very simple, has alleviateed operator's intensity of labour, has improved production efficiency, has solved the double-screw bolt of mandrel effectively and has been difficult to screw up the problem in the frame screw hole.
Description
Technical Field
The utility model relates to a fixed connection assembly of gear shaft and frame, in particular to marine diesel engine gear spindle one end of double-end screw type twists the frock of fixing in the frame, belongs to pincers worker technical field.
Background
The gear transmission part sleeve is a core part sleeve for the marine diesel engine to work, and the installation quality of the gear transmission part sleeve directly influences the overall performance and the service life of the marine diesel engine. Fig. 1 is a partial view of a gear transmission part sleeve of a medium-speed diesel engine for a certain type of ship, a positioning boss 101 at the end of the left end of a positioning sleeve 10 is respectively embedded into a threaded positioning counterbore 201 corresponding to a rack 20, an upper transmission gear 30 and a lower transmission gear 40 are respectively supported on the respective corresponding positioning sleeve 10 through a sliding shaft sleeve 50, a stud 601 at one end of a stud-screw-type marine diesel engine gear spindle 60 is screwed into a corresponding rack threaded hole 202, and the end surface of a cylinder 602 extended by the stud 601 at one end abuts against the conical surface of a rack threaded extension bottom hole 203, so that the coaxiality of the axis of the marine diesel engine gear spindle 60 and the axis of the rack threaded hole 202 is ensured through the positioning of the. The positioning sleeves 10 are respectively sleeved on the middle parts of the corresponding diesel engine gear spindles 60, and other parts are mounted in the middle of a stud 603 at the other end of the marine diesel engine gear spindle 60 and then locked by a round nut 70. Thus, the marine diesel gear spindle 60 only bears the bending moment of the upper transmission gear 30 or the lower transmission gear 40 borne by the marine diesel gear spindle and does not bear the torque generated when the gears are meshed, so that the stress state of the marine diesel gear spindle is improved, and the reliability of the marine diesel gear spindle is improved.
In the process of screwing a stud at one end of an existing marine diesel engine gear spindle into a threaded hole of a rack, an operator firstly manually screws the stud at one end of the marine diesel engine gear spindle into the threaded hole of the rack, then screws a blind nut on the end head of the stud at the other end of the marine diesel engine gear spindle, clockwise pulls the blind nut by using a torque wrench, and utilizes the locking effect of the blind nut after the blind nut is rotated in place and the threads at the end head of the stud to fixedly connect the blind nut and the marine diesel engine gear spindle into a whole, and then rotates the blind nut to drive the marine diesel engine gear spindle to rotate, so that the stud at one end of the marine diesel engine gear spindle is screwed into the threaded hole of the. When the marine diesel engine gear spindle is screwed up by adopting the screwing mode, because the diameters of the studs at two ends of the marine diesel engine gear spindle are the same, the torques applied by pulling the blind hole nuts are equal, and even if the blind hole nuts are pulled to slip, whether the studs at one end of the marine diesel engine gear spindle are screwed up in the threaded holes of the rack is difficult to judge. In addition, when the blind hole nut is removed, a stud at one end of the gear spindle of the marine diesel engine is easy to unscrew, and the assembling quality of the marine diesel engine is affected.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a frock is screwed up to marine diesel gear mandrel and screws up the method, improves marine diesel's assembly quality.
The utility model discloses a following technical scheme realizes:
a marine diesel gear mandrel tightening tool comprises a round nut assembly and an outer hexagonal compression bolt, wherein the round nut assembly comprises a special round nut and an outer hexagonal nut fixed on one side of the special round nut in a welding mode, the inner thread of the outer hexagonal nut is smaller than that of the special round nut, and the axial lead of the outer hexagonal nut is coaxial with that of the special round nut; a stud at one end of the marine diesel engine gear spindle is screwed into a threaded hole of the rack, and a special round nut is screwed on a stud at the other end of the marine diesel engine gear spindle; the outer hexagonal compression bolt is screwed into the outer hexagonal nut, and the end of the outer hexagonal compression bolt extending into the special round nut is tightly pressed on the end surface of the other stud of the marine diesel engine gear spindle.
The object of the invention is further achieved by the following technical measures.
Furthermore, the coaxiality tolerance between the shaft axis of the outer hexagonal nut and the shaft axis of the special round nut is 0.60-0.80 mm. The ratio of the diameter D of the external thread of the outer hexagonal compression bolt to the diameter D of the internal thread of the special round nut is as follows: D/D =0.65 ~ 0.75. The ratio of the length L of the end of the outer hexagonal compression bolt extending into the special round nut to the thickness H of the special round nut is as follows: L/H = 0.36 ~ 0.40.
The utility model discloses constitute by special round nut, outer hexagon nut and outer hexagonal clamp bolt, only 3 parts, the structure is very simple. The end of the outer hexagonal compression bolt is tightly pressed on the end surface of the other stud of the marine diesel engine gear spindle, and the outer hexagonal compression bolt, the marine diesel engine gear spindle and the round nut assembly are fixedly connected into a whole by using static friction force generated by pressing. Therefore, the torque wrench is used for clockwise wrenching the outer hexagon nut of the round nut component, the outer hexagon nut drives the special round nut to rotate, meanwhile, the marine diesel engine gear spindle is driven to rotate through the outer hexagon compression bolt, only a small torque needs to be applied to the outer hexagon nut, the diesel engine gear spindle can be driven to rotate, and a stud of the marine diesel engine gear spindle is enabled to be screwed up in the rack threaded hole. When the gear runs, the gear spindle of the diesel engine cannot be loosened, and the assembling quality of the marine diesel engine gear transmission system is improved. The utility model discloses alleviate operator's intensity of labour, improved production efficiency, the one end double-screw bolt of having solved marine diesel gear mandrel effectively is difficult to screw up the problem in the frame screw hole.
The advantages and features of the invention 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 partial view of a marine medium speed diesel engine gear drive housing;
fig. 2 is a structural diagram of the device of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings and examples of model L27/38 marine diesel engines.
As shown in fig. 2, the present embodiment includes a round nut assembly 1 and an outer hexagonal pressing bolt 2, the round nut assembly 1 includes a special round nut 11 and an outer hexagonal nut 12 welded and fixed on the right side of the special round nut 11, the internal thread of the outer hexagonal nut 12 is smaller than the internal thread of the special round nut 11, the axial lead of the outer hexagonal nut 12 is coaxial with the axial lead of the special round nut 11, and the coaxiality tolerance is 0.60-0.80 mm, so that when the outer hexagonal nut 12 is pulled, the special round nut 11 can drive a stud 601 at one end of the marine diesel gear spindle 60 to be screwed into the rack threaded hole 202. The special round nut 11 is screwed on the other stud 603 of the marine diesel gear spindle 60, the outer hexagonal compression bolt 2 is screwed into the outer hexagonal nut 12, and the end of the outer hexagonal compression bolt 2 extending into the special round nut 11 is compressed on the end face of the stud 603 at the other end of the marine diesel gear spindle 60. The ratio of the external thread diameter D of the external hexagonal pressure bolt 2 of the present embodiment to the internal thread diameter D of the special round nut 11: D/D =0.7, the internal thread diameter D of the special round nut 11 is M39 × 1.5, and the external thread diameter D of the outer hexagonal compression bolt 2 is M27. The ratio of the length L of the end of the outer hexagonal compression bolt 2 extending into the special round nut 11 to the thickness H of the special round nut is as follows: L/H = 0.38 and L =15mm, so that the special round nut 11 and the other stud 603 of the marine diesel gear spindle 60 have enough threaded connection length, and the end of the outer hexagonal compression bolt 2 is conveniently compressed on the end face of the other stud 603 of the marine diesel gear spindle 60.
The utility model discloses screw up marine diesel engine gear spindle's process as follows:
1) preparation before tool installation
The positioning boss 101 at one end of the positioning sleeve 10 is embedded into the threaded positioning counterbore 201 of the frame, and the marine diesel gear spindle 60 to be screwed into the threaded hole 202 of the frame is accurately guided.
2) One end stud 601 of the marine diesel gear spindle 60 is preliminarily screwed into the corresponding frame threaded hole 202
The marine diesel gear spindle 60 is inserted through the positioning sleeve 10, so that the stud 601 at one end of the marine diesel gear spindle 60 abuts against the corresponding frame threaded hole 202, and then the operator holds the other end of the marine diesel gear spindle 60 by hand to screw the stud 601 at one end of the marine diesel gear spindle 60 into the corresponding frame threaded hole 202 until the manual screwing is stopped.
3) The tool is arranged on a stud 603 at the other end of the marine diesel gear spindle 60
Screwing the outer hexagonal compression bolt 2 into the special round nut 11 of the round nut component 1, wherein the length L of the end of the outer hexagonal compression bolt 2 extending into the special round nut 11 reaches 0.38 of the thickness H of the special round nut, namely 15 mm; then, the special round nut 11 of the round nut component 1 is screwed on the stud 603 at the other end of the marine diesel gear spindle 60, an operator rotates the round nut component 1 by hand, the round nut component 11 moves towards the direction of the positioning sleeve 10 along the stud 603 at the other end of the marine diesel gear spindle 60, so that the end of the outer hexagonal compression bolt 2 presses the end of the stud 603 at the other end of the marine diesel gear spindle 60, static friction force generated by compressing the marine diesel gear spindle 60 through the outer hexagonal compression bolt 2 and fixing action of threaded connection of the round nut component 11 and the stud 603 at the other end of the marine diesel gear spindle 60 connect the outer hexagonal compression bolt 2, the round nut component 11 and the marine diesel gear spindle 60 into a whole.
4) One end stud 601 of the marine diesel gear spindle 60 is screwed in the corresponding frame threaded hole 202
According to the set torque, the outer hexagon nut 12 of the round nut component 1 is pulled clockwise by a torque wrench, the outer hexagon nut 12 drives the special round nut 11 to rotate, and simultaneously drives the marine diesel engine gear spindle 60 to rotate. Because the outer hexagonal compression bolt 2, the round nut component 11 and the marine diesel gear spindle 60 are connected into a whole, the special round nut 11 and the other end of the marine diesel gear spindle 60 cannot rotate relatively. The torque wrench is pulled to slip, and at this time, it is ensured that the stud 601 at one end of the marine diesel gear spindle 60 is screwed into the corresponding frame threaded hole 202.
5) Demounting tool
The head of the outer hexagonal compression bolt 2 is pulled anticlockwise by an open end wrench, and the outer hexagonal compression bolt 2 is loosened. Since the torque for wrenching the open end wrench is less than the torque for wrenching the round nut screwed on the marine diesel gear spindle 60 by the torque wrench, the marine diesel gear spindle 60 will not loosen and follow up rotation and then the operator will rotate the round nut assembly 1 counterclockwise to separate it from the stud 603 at the other end of the marine diesel gear spindle 60.
The utility model discloses can be used to screw up the one end double-screw bolt of the double-end screw of fixed multiple specification.
In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions adopting equivalent substitution or equivalent transformation fall within the protection scope claimed by the present invention.
Claims (4)
1. The marine diesel gear spindle tightening tool is characterized by comprising a round nut assembly and an outer hexagonal compression bolt, wherein the round nut assembly comprises a special round nut and an outer hexagonal nut fixed on one side of the special round nut in a welding mode, the inner thread of the outer hexagonal nut is smaller than that of the special round nut, and the axial lead of the outer hexagonal nut is coaxial with that of the special round nut; a stud at one end of the marine diesel engine gear spindle is screwed into a threaded hole of the rack, and a special round nut is screwed on a stud at the other end of the marine diesel engine gear spindle; the outer hexagonal compression bolt is screwed into the outer hexagonal nut, and the end of the outer hexagonal compression bolt extending into the special round nut is tightly pressed on the end face of the other threaded end of the marine diesel engine gear spindle.
2. The marine diesel gear spindle tightening tool according to claim 1, wherein a coaxiality tolerance between an axis of the outer hexagonal nut and an axis of the special round nut is 0.60-0.80 mm.
3. The marine diesel gear spindle tightening tool according to claim 1, wherein the ratio of the diameter D of the external thread of the external hexagonal compression bolt to the diameter D of the internal thread of the special round nut is as follows: D/D =0.65 ~ 0.75.
4. The marine diesel gear spindle tightening tool according to claim 1, wherein the ratio of the length L of the end of the outer hexagonal compression bolt extending into the special round nut to the thickness H of the special round nut is: L/H = 0.36 ~ 0.40.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021709691.XU CN212351865U (en) | 2020-08-17 | 2020-08-17 | Marine diesel gear mandrel tightening tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021709691.XU CN212351865U (en) | 2020-08-17 | 2020-08-17 | Marine diesel gear mandrel tightening tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212351865U true CN212351865U (en) | 2021-01-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021709691.XU Active CN212351865U (en) | 2020-08-17 | 2020-08-17 | Marine diesel gear mandrel tightening tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212351865U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111843928A (en) * | 2020-08-17 | 2020-10-30 | 中船动力有限公司 | Marine diesel engine gear spindle screwing tool and screwing method |
-
2020
- 2020-08-17 CN CN202021709691.XU patent/CN212351865U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111843928A (en) * | 2020-08-17 | 2020-10-30 | 中船动力有限公司 | Marine diesel engine gear spindle screwing tool and screwing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 402, Changjiang Road, Zhenjiang City, Jiangsu Province, 212002 Patentee after: China Shipbuilding Power Zhenjiang Co.,Ltd. Address before: 402 Changjiang Road, Runzhou District, Zhenjiang City, Jiangsu Province Patentee before: CSSC MARINE POWER Co.,Ltd. |
|
| CP03 | Change of name, title or address |