CN220621790U - Modular pin shaft combination device - Google Patents
Modular pin shaft combination device Download PDFInfo
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- CN220621790U CN220621790U CN202322271833.9U CN202322271833U CN220621790U CN 220621790 U CN220621790 U CN 220621790U CN 202322271833 U CN202322271833 U CN 202322271833U CN 220621790 U CN220621790 U CN 220621790U
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- shaft
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- pin shaft
- inner hole
- pin
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- 229910000617 Mangalloy Inorganic materials 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 7
- 238000005553 drilling Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
Abstract
The utility model discloses a modular pin shaft combination device which is used for fixing and disassembling a pin shaft of an elevator joint, wherein a U-shaped groove is formed in the elevator joint, a left shaft hole and a right shaft hole for accommodating the pin shaft to pass through are respectively formed in two ends of the U-shaped groove, an inner hole step is formed in the outer end face of the right shaft hole, the diameter of the inner hole step is larger than that of the right shaft hole, and the inner hole step is matched with a shaft shoulder additionally arranged at the end part of the pin shaft to realize clamping; an inner hole snap spring groove is dug at the position adjacent to the inner hole step, the diameter of the inner hole snap spring groove is larger than that of the inner hole step, and a hole elastic retainer ring is arranged in the inner hole snap spring groove. According to the utility model, the pin shaft is connected with the joint of the lifter without using bolts or nuts to prevent loosening, so that the integral structure of the pin shaft and the joint is not damaged, and the rigidity is maximized; the anti-vibration characteristic of the elastic retainer ring is utilized, and meanwhile, the installation and fixation modes of the hole elastic retainer ring and the shaft elastic retainer ring are adopted, so that the installation and the disassembly of the pin shaft are quicker while the safety and the reliability are ensured, the use cost is greatly reduced, and the working time is saved.
Description
Technical Field
The utility model relates to the technical field of rotary connection joints for rotary drilling rigs, in particular to a modular pin shaft combination device which is used for changing the diameter of a pin shaft along with the change of the size of a workpiece or a part.
Background
The pin shaft is a fastener commonly used in the mechanical industry, can be fixedly connected in a static state and can also relatively move with a connected piece, and is mainly used for the hinge joint of two parts to form a hinge connection commonly used for a movable hinge point. The pin is typically locked with a cotter pin. The pin shaft used for the rotary joint of the engineering machinery rotary drilling rig is provided with a locking device, so that serious safety accidents caused by the falling off of the pin shaft due to vibration in the use process are avoided.
Pin shafts and locking devices in common use of the rotary drilling rig elevator joint have three structures:
patent name filed by the first, third-fold company, inc.: the lifting device comprises a lifting device pin shaft assembly, a lifting device and a rotary drilling rig; publication/bulletin number: CN103075118B, the structure of which is shown in fig. 1:
the elevator pin shaft assembly comprises an elevator joint 010, an elevator pin shaft 020, a perforated baffle sleeve 030, a first anti-falling bolt 040, a second anti-falling bolt 050 and a stop gasket 060, wherein one end of the elevator pin shaft 020 is provided with a shaft shoulder, and the other end of the elevator pin shaft is connected with the first anti-falling bolt 040 and the second anti-falling bolt 050; the first anti-drop bolt 040 and the second anti-drop bolt 050 are both arranged in a different shaft with the lifter pin shaft 020; the perforated baffle sleeve 030 is arranged on the first anti-falling bolt 040 and the second anti-falling bolt 050 and is used for being matched with the elevator joint 010 to limit the position of the elevator pin shaft 020, the anti-falling bolts 040 and 050 are not coaxial with the elevator pin shaft 020, the rotation centers of the anti-falling bolts 040 and 050 are different from the rotation center of the elevator pin shaft 020, the stop gasket 060 is arranged between the perforated baffle sleeve 030 and the first anti-falling bolt 040 and the second anti-falling bolt 050, the anti-falling bolts 040 and 050 cannot rotate and fall along with vibration or autorotation of the elevator pin shaft 020 when the elevator vibrates, the elevator pin shaft 020 is stably fastened at an initial installation position, and serious safety accidents caused by the fact that the elevator pin shaft 020 exits from the elevator pin shaft hole are reduced.
The following disadvantages are presented for the above structure:
1. the first anti-falling bolt and the second anti-falling bolt are connected to threaded holes in the lifter pin shaft in a threaded mode, and the structure of the lifter pin shaft is affected.
2. The lifter pin shaft needs to be drilled and tapped, and in addition, the baffle sleeve, the first anti-falling bolt and the second anti-falling bolt are required to be perforated, so that the cost is high.
The second is shown in fig. 2:
the elevator pin shaft assembly comprises an elevator joint 110, an elevator pin shaft 120, a pin shaft tightening nut 130 and a limiting pad 140, wherein one end of the elevator pin shaft 120 is provided with a shaft shoulder, the other end of the elevator pin shaft is provided with threads, the elevator pin shaft is inserted into an inner hole of the elevator joint 110, the pin shaft tightening nut 130 is arranged on the threads of the elevator pin shaft 120 to prevent the elevator pin shaft 120 from falling off, in order to prevent the elevator pin shaft 120 from loosening from the inner hole of the elevator 110 due to vibration during operation of the elevator, the retaining pad 140 is arranged below the pin shaft tightening nut 130 to clamp the tightening nut 130, the screw loosening of the pin shaft tightening nut 130 from the elevator pin shaft 120 is effectively prevented, the elevator pin shaft 120 is prevented from exiting from an elevator shaft hole, and the safe use of the elevator is ensured.
The following disadvantages are presented for the above structure:
the other end of the shaft shoulder of the pin shaft of the elevator needs to be provided with threads, the tightening nut is matched with the stop pad, the tightening nut is time-consuming to install and detach, and the detachment after the threads are rusted is troublesome particularly because of muddy water environment.
The third is shown in fig. 3:
the elevator pin shaft assembly comprises an elevator joint 001, a pin shaft 002, a pin shaft baffle 003, a fastening bolt 004 and a fastening nut 005, wherein an inner hole thread is formed in the center of the pin shaft 002, a shaft shoulder is arranged at one end of the pin shaft 002, one end of the pin shaft 002 without the shaft shoulder is inserted into an elevator joint 001 pin hole, the fastening bolt 004 penetrates through the inner hole thread of one end of the pin shaft 002 without the shaft shoulder after penetrating through the center hole of the pin shaft baffle 003, the fastening nut 005 is arranged on the fastening bolt 004 penetrating through the center hole of the pin shaft 002, the fastening bolt 004 is prevented from loosening from the inner hole of the pin shaft 002, the pin shaft 002 is firmly attached to the pin shaft 002, and the pin shaft 002 is firmly ensured in the elevator joint 001 pin hole.
The following disadvantages are presented for the above structure:
the pin shaft is required to process an inner hole and tap, and the fastening bolt, the loosening nut and the pin shaft baffle are required to be installed, so that the pin shaft is safe and reliable, but the production cost is high, and the installation is complex.
Disclosure of Invention
The utility model aims to provide a pin shaft combination device which is characterized in that the diameter of a pin shaft can be changed along with the change of the size of a workpiece or a part, and the pin shaft combination device is designed and manufactured in a modularized mode, is quickly replaced, is simple in structure and reliable in use and has low manufacturing cost.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
the modular pin shaft combination device is used for fixing and disassembling a pin shaft of an elevator joint, a U-shaped groove is formed in the elevator joint, a left shaft hole and a right shaft hole for accommodating the pin shaft to pass through are respectively formed in two ends of the U-shaped groove, an inner hole step is formed in the outer end face of the right shaft hole, the diameter of the inner hole step is larger than that of the right shaft hole, and the inner hole step is matched with a shaft shoulder additionally arranged at the end part of the pin shaft to realize clamping; digging an inner hole snap spring groove adjacent to the inner hole step, wherein the diameter of the inner hole snap spring groove is larger than that of the inner hole step, and a hole elastic retainer ring is arranged in the inner hole snap spring groove;
the outer end face of the left shaft hole is inwards provided with a counter bore step, the end part of the pin shaft, which is positioned in the counter bore step, is dug with an outer circle clamp spring groove, an elastic retainer ring for the shaft is arranged in the outer circle clamp spring groove, and the diameter of the elastic retainer ring for the shaft is larger than that of the left shaft hole;
after the pin shaft is inserted from the right shaft hole, the pin shaft penetrates through the left shaft hole, the hole elastic retainer ring is arranged in the lifter joint inner hole clamp spring groove, the pin shaft shoulder is matched with the hole elastic retainer ring to block the pin shaft shoulder, and the pin shaft is prevented from withdrawing from the lifter joint inner hole; the elastic retainer ring for the shaft is arranged in the outer circle clamp spring groove of the pin shaft and is matched with the outer end face of one end of the U-shaped groove of the elevator joint, which is provided with a through hole, so as to prevent the pin shaft from exiting from the inner hole of the elevator joint,
the further preferable technical scheme is that the diameter of the right shaft hole is larger than or equal to that of the left shaft hole.
A further preferred solution is that the circlips for holes and the circlips for shafts are optionally thickened.
The further preferable technical scheme is that the shaft neck of the pin shaft in the U-shaped groove of the lifter is stressed radially, the hole elastic check ring and the shaft elastic check ring only play a limiting role, the lifter joint and the pin shaft are used in a vibration working condition environment, the hole elastic check ring and the shaft elastic check ring generate tension, and the hole elastic check ring and the shaft elastic check ring are respectively fixed in the inner hole clamp spring groove and the outer circle clamp spring groove.
According to a further preferable technical scheme, the hole circlip and the shaft circlip are made of high manganese steel 65Mn, and the yield strength is 430MPa.
The beneficial effects of the utility model are as follows:
1. the pin shaft is connected with the joint of the elevator without using bolts or nuts to prevent loosening, so that the integral structure of the pin shaft and the joint is not damaged, and the rigidity is maximized;
2. the anti-vibration characteristic of the elastic retainer ring is utilized, and meanwhile, the installation and fixation modes of the hole elastic retainer ring and the shaft elastic retainer ring are adopted, so that the installation and the disassembly of the pin shaft are quicker while the safety and the reliability are ensured, the use cost is greatly reduced, and the working time is saved.
3. The pin shaft and the pin hole can be in modularized design, the diameter of the shaft neck is changed within a certain diameter range, pin shafts with different specifications can be used, the matching efficiency is improved, and the stock quantity of the connectors of the elevator is greatly reduced.
Drawings
FIG. 1 is a schematic view of a pin structure of a first prior art elevator described in the background art;
FIG. 2 is a schematic view of a pin structure of a second prior art elevator described in the background;
FIG. 3 is a schematic view of a pin structure of a third prior art elevator described in the background;
fig. 4 is a schematic structural view of a modular pin assembly according to the present utility model;
FIG. 5 is an enlarged view of portion A of FIG. 4;
fig. 6 is a partial enlarged view of the portion B in fig. 4.
Detailed Description
The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings.
The utility model will be described in further detail with reference to the drawings and the detailed description.
Fig. 4 is a schematic structural view of the modular pin assembly of the present utility model, fig. 5 is a partially enlarged view of a portion a in fig. 4, and fig. 6 is a partially enlarged view of a portion B in fig. 4. As shown in fig. 4, 5 and 6, the utility model provides a modular pin shaft combination device, which has modularized design and more compact structure compared with the similar products; the bolts are not used, so that the integral structure of the pin shaft and the joint is not damaged; the elastic retainer ring is provided with certain vibration resistance, a double-clamping spring fixing mode of the elastic retainer ring for holes and the elastic retainer ring for shafts is adopted, and the characteristics of rapider installation and disassembly, lower use cost and the like are ensured while the safety and reliability are ensured; an inner hole snap spring groove 820 is dug adjacent to the inner hole step 810, the diameter of the inner hole snap spring groove 820 is larger than that of the inner hole step 810, and a hole elastic retainer ring 603 is arranged in the inner hole snap spring groove 820;
the left shaft hole and the right shaft hole at the two ends of the U-shaped groove are coaxial, a counter bore step 830 is arranged inwards on the outer end face of the left shaft hole, an outer circle clamp spring groove 920 is dug at the end part of the pin shaft 602, which is positioned in the counter bore step 830, an elastic check ring 604 for the shaft is arranged in the outer circle clamp spring groove 920, and the diameter of the elastic check ring 920 for the shaft is larger than that of the left shaft hole;
the circlips 603 and 604 may be thickened according to the actual load conditions.
The end of the pin shaft 601 with the outer circle clamp spring groove 920 is inserted into the right shaft hole of the elevator joint U-shaped groove with the inner hole clamp spring groove 820, after the shaft shoulder 910 of the pin shaft 602 contacts with the end face of the elevator joint inner hole clamp spring groove 820, the hole elastic retainer 603 is arranged in the elevator joint inner hole clamp spring groove 820 to prevent the pin shaft 602 from withdrawing from the elevator joint inner hole clamp spring groove 820, the shaft elastic retainer 604 is arranged in the outer circle clamp spring groove 920 of the pin shaft 602, the pin shaft 602 is further stopped from withdrawing from the elevator joint 601 pin shaft hole, the connection of the double protection pin shaft 602 and the elevator joint 601 is achieved, and the purpose of safety is achieved.
In an embodiment, the shaft neck 930 of the pin shaft 602 is stressed radially, the hole circlip 603 and the shaft circlip 604 generally only play a limiting role, the lifter joint 601 and the pin shaft 602 are generally used in an environment with certain vibration working conditions, the hole circlip 603 and the shaft circlip 604 have certain tension, and the hole circlip 603 and the shaft circlip 604 are respectively and firmly fixed in the snap ring groove and cannot fall off.
In the embodiment, the materials of the hole circlip 603 and the shaft circlip 604 are made of high manganese steel 65Mn, the yield strength is generally 430MPa, the acting force is enough to prevent the pin shaft 602 from withdrawing from the inner hole of the elevator joint 601, and the double-clip spring structure of the hole circlip 603 and the shaft circlip 604 further prevents the pin shaft 602 from withdrawing from the pin hole of the elevator joint 601, so that the double protection function is realized.
In an embodiment, when the diameter of one end of the circlip 603 for the pin hole mounting hole of the elevator joint 601 is larger than that of the other end of the circlip 604 for the shaft, the diameter of the shoulder 910 of the pin 602 can be changed to a certain extent, the pin 602 can achieve a modularized design, and the application range is wider in cooperation with the locking mode of the double circlips of the circlips 603 for the hole and 604 for the shaft.
The foregoing is a further detailed description of the utility model in connection with specific preferred embodiments, and is not intended to limit the practice of the utility model to such description. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.
Claims (5)
1. The modular pin shaft combination device is used for fixing and disassembling a pin shaft of an elevator joint, a U-shaped groove is arranged on the elevator joint, a left shaft hole and a right shaft hole for accommodating the pin shaft to pass through are respectively formed in two ends of the U-shaped groove, and the modular pin shaft combination device is characterized in that an inner hole step is arranged on the outer end face of the right shaft hole, the diameter of the inner hole step is larger than that of the right shaft hole, and the inner hole step is matched with a shaft shoulder additionally arranged at the end part of the pin shaft to realize clamping; digging an inner hole snap spring groove adjacent to the inner hole step, wherein the diameter of the inner hole snap spring groove is larger than that of the inner hole step, and a hole elastic retainer ring is arranged in the inner hole snap spring groove;
the outer end face of the left shaft hole is inwards provided with a counter bore step, the end part of the pin shaft, which is positioned in the counter bore step, is dug with an outer circle clamp spring groove, an elastic retainer ring for the shaft is arranged in the outer circle clamp spring groove, and the diameter of the elastic retainer ring for the shaft is larger than that of the left shaft hole;
after the pin shaft is inserted from the right shaft hole, the pin shaft penetrates through the left shaft hole, the hole elastic retainer ring is arranged in the lifter joint inner hole clamp spring groove, the pin shaft shoulder is matched with the hole elastic retainer ring to block the pin shaft shoulder, and the pin shaft is prevented from withdrawing from the lifter joint inner hole; and (3) loading the elastic retainer ring for the shaft into the outer circle clamp spring groove of the pin shaft, and matching with the outer end surface of one end of the U-shaped groove of the elevator joint, which is provided with the through hole, so as to prevent the pin shaft from exiting from the inner hole of the elevator joint.
2. The modular pin assembly of claim 1, wherein the right shaft hole has a diameter greater than or equal to the diameter of the left shaft hole.
3. A modular pin assembly as claimed in claim 1, wherein the circlips are optionally thickened.
4. The modular pin assembly of claim 1, wherein the pin is radially stressed by a journal located in a U-shaped groove of the elevator, the circlips for holes and circlips for shafts only play a limiting role, the elevator joint and pin are used in a vibration working condition environment, the circlips for holes and circlips for shafts generate tension, and the circlips for holes and the circlips for shafts are respectively fixed in a hole circlip groove and an outer circlip groove.
5. The modular pin assembly of claim 1, wherein the circlip for hole and circlip for shaft are made of high manganese steel 65Mn and have a yield strength of 430MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322271833.9U CN220621790U (en) | 2023-08-23 | 2023-08-23 | Modular pin shaft combination device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322271833.9U CN220621790U (en) | 2023-08-23 | 2023-08-23 | Modular pin shaft combination device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220621790U true CN220621790U (en) | 2024-03-19 |
Family
ID=90214333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322271833.9U Active CN220621790U (en) | 2023-08-23 | 2023-08-23 | Modular pin shaft combination device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220621790U (en) |
-
2023
- 2023-08-23 CN CN202322271833.9U patent/CN220621790U/en active Active
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