CN113561122B - Tool for mounting sealing ring on shaft lever and mounting method - Google Patents
Tool for mounting sealing ring on shaft lever and mounting method Download PDFInfo
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- CN113561122B CN113561122B CN202110773068.3A CN202110773068A CN113561122B CN 113561122 B CN113561122 B CN 113561122B CN 202110773068 A CN202110773068 A CN 202110773068A CN 113561122 B CN113561122 B CN 113561122B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/0028—Tools for removing or installing seals
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Abstract
A tool for mounting a sealing ring on a shaft rod and a mounting method thereof comprise a positioning plate, a push ring and an expansion ring position sending rod, wherein the positioning plate, the push ring and the expansion ring position sending rod are matched to finish positioning and mounting of the sealing ring. Wherein, the push ring is sleeved on the outer circumferential surface of the tail end of the piston ring position feeding rod; the positioning plate is positioned at the end face of the tail end of the piston ring position feeding rod and is embedded into a sealing ring mounting groove on the outer circumferential surface of the shaft lever in the piston ring position feeding rod. The installation process of the sealing ring is divided into stages and refined, the expansion of the sealing ring on the piston ring position-sending rod is sequentially carried out, the positioning plate is used for determining the installation position of the sealing ring, the sealing ring is pushed to the upper part of the installation position, the sealing ring falls into the sealing ring installation groove, the processes are sequentially repeated, so that the installation of each sealing ring is completed, the installation process is simplified, the phenomenon that the sealing ring directly scratches the top edge of the sealing ring installation groove during the installation in the prior art to cause the installation damage of the sealing ring is avoided, and the installation quality of the sealing ring is ensured.
Description
Technical Field
The invention belongs to a sealing ring mounting tool used in the hydraulic and pneumatic fields, in particular to a sealing ring mounting tool for a shaft lever.
Background
In the hydraulic and pneumatic fields, the sealing function is usually realized by using a sealing ring, but the sealing ring has the problem of inconvenient installation and operation due to different use environments of the sealing ring, and for the problem, technicians use specific installation tools to solve the corresponding problems.
CN201872136U is a sealing ring mounting tool for a piston rod, and is shown in figure 1, and the sealing ring mounting tool comprises a mounting ring, wherein one end of the mounting ring is connected with an expanding sleeve through a spigot, the maximum excircle of a supporting surface at the spigot joint of the mounting ring is consistent with the maximum diameter of the expanding sleeve, and the other end of the mounting ring is a conical guide surface.
CN201320289218.4 relates to an installation tool for a large-diameter metal-clad lip-shaped seal ring, which comprises a screw, a positioning nut, a pressure plate and a push rod, as shown in fig. 2; the lower part of the screw rod and the upper part of the ejector rod are respectively screwed with the threaded holes on the pressure plate, the positioning nut is sleeved on the screw rod, and the positioning spigot on the lower surface of the positioning nut is matched with the pressure plate. The bottom end of the screw rod is screwed with the sealing gland for pressing the sealing ring. The pressing plate is also provided with a reserved threaded hole. A plurality of the installation tools are arranged along the circumference of the sealing ring for use. The sealing ring mounting tool is simple in structure, convenient to manufacture, easy to operate, capable of being mounted in the sealing gland stably and quickly after being dismounted, capable of using a plurality of tools simultaneously, high in working efficiency and capable of avoiding damage to the sealing ring. The scheme solves the problems that the large-diameter metal-clad compound lip-shaped sealing ring which is used in a large amount in cement and metallurgical mine industry equipment has large diameter ratio, large assembly difficulty and high manufacturing precision, and sealing deformation and damage caused by hammering the sealing ring in installation are avoided by using the group of mounting tools.
CN201420582660.0 relates to a press fitting tool for a non-elastic sealing ring, which comprises a press fitting rod and a guide cylinder for guiding the non-elastic sealing ring, as shown in fig. 3, wherein the press fitting rod is made of an elastic material and comprises a cylindrical body, a plurality of support legs which are arranged along the circumferential direction of the body and have arc-shaped cross sections are arranged at the first end of the body, a circle capable of applying thrust to the non-elastic sealing ring is surrounded by the plurality of support legs, a truncated cone is arranged at the second end of the body, and a tapered central hole is formed in the guide cylinder. Adopt this utility model's pressure equipment instrument of inelastic sealing ring, be convenient for install the sealing washer to the groove in. The proposal is a tool for installing the inelastic sealing ring installed in the hole, and can not solve the problem that the sealing ring installed outside the ordinary elastic sealing ring is easy to cut.
CN201820619013.0 relates to an oil cylinder combined seal ring installation tool, as shown in fig. 4, which comprises a clamping bracket, a pushing mechanism and a pushing compression ring; a clamping groove for placing the combined sealing ring is formed in the clamping support, a pushing compression ring capable of sliding up and down along the axis of the clamping groove is arranged in the clamping groove, and a pushing mechanism for pushing the pushing compression ring is arranged at one end of the pushing compression ring; the pushing mechanism comprises a fixing unit and a moving unit, the fixing unit is connected to the clamping support, the moving unit can move relative to the fixing unit and push the pushing compression ring, the combined sealing ring in the clamping groove is pushed through the pushing compression ring, and the combined sealing ring is installed. The utility model has the advantages that the installation is fast and accurate through the combined use of the clamping bracket, the pushing mechanism and the pushing compression ring; in the installation process, the installation surface of the combined sealing ring is not damaged. The scheme is only suitable for installation of the combined sealing ring, the combined sealing ring is required to have certain rigidity, and the combined sealing ring is not suitable for installation of a sealing ring made of rubber with high elasticity.
CN201821239610.7 relates to an electrode sealing ring mounting tool, as shown in fig. 5, which includes a guiding portion, a limiting portion and a handle portion, sequentially connected into a whole; the shape and size of the guide part are consistent with those of the inner hole of the electrode, the length of the guide part is the sum of the length of the electrode and the thickness of the sealing ring, and grooves are formed in the upper edge and the lower edge of the joint of the guide part and the limiting part; the width of the limiting part is larger than that of the guiding part; the tail end of the handle part is provided with a through hole; the limiting part and the handle part are in arc transition connection. The device can realize the simultaneous installation of the electrode and the sealing ring, is a special tool for installing the sealing ring in the inner hole of the electrode, and is not suitable for the operation of installing the sealing ring outside the device.
Disclosure of Invention
The invention provides a tool for mounting a sealing ring on a shaft lever and a mounting method, aiming at overcoming the defects that the mounting quality is not high, the mounting is not suitable for mounting a rubber sealing ring, the mounting position of the sealing ring needs to be determined blindly, and the sealing ring is easy to damage in the mounting process in the prior art.
The shaft lever is in a rod shape, and 3 sealing ring mounting grooves are distributed on the outer circumferential surface of the shaft lever and respectively comprise a first sealing ring mounting groove, a second sealing ring mounting groove and a third sealing ring mounting groove in sequence.
The invention is technically characterized by comprising a positioning plate, a push ring and an expansion ring position-sending rod, wherein the positioning plate, the push ring and the expansion ring position-sending rod are matched for use to complete the positioning and installation of a sealing ring. Wherein, the push ring is sleeved on the outer circumferential surface of the tail end of the piston ring position feeding rod; the positioning plate is positioned at the end face of the tail end of the piston ring position feeding rod and is embedded into a sealing ring mounting groove on the outer circumferential surface of the shaft lever in the piston ring position feeding rod.
And one end of the piston ring position-sending rod is provided with an exhaust hole, and the other end of the piston ring position-sending rod is provided with a shaft rod hole, so that the exhaust hole is communicated with the shaft rod hole. The inner diameter of the shaft rod hole is the same as the outer diameter of the shaft rod, the shaft rod hole and the shaft rod are in clearance fit, and the clearance is 0.01-0.05 mm. The axial length of the spindle bore is the same as the axial length of the spindle. The outer circumferential surface of the end of the piston ring position-sending rod with the exhaust hole is a conical surface, and the minimum diameter of the outer circumferential surface is smaller than the inner diameter of the sealing ring, so that the sealing ring is conveniently sleeved.
The locating plate is a rectangular plate, a U-shaped groove is formed in one short edge of the locating plate, and the bottom of the U-shaped groove is in a semi-circular arc shape. The radius of the semicircular arc is the same as the radius of the groove bottom of the sealing groove on the shaft rod; when the positioning plate is embedded into the sealing groove, the positioning plate and the sealing groove are in clearance fit; the depth of the U-shaped groove is more than or equal to the diameter of the position of the shaft lever sealing groove, the depth of the sealing groove and the diameter of the section of the sealing ring.
The inner diameter of the push ring is the same as the maximum outer diameter of the piston ring position sending rod; the outer diameter of the push ring is 6mm larger than the inner diameter of the push ring.
The specific process for installing the sealing ring on the shaft lever by using the tool provided by the invention comprises the following steps:
and step 1, clamping the U-shaped groove on the positioning plate in a first sealing ring mounting groove at the outer end of the shaft rod with the mounting sealing ring. And the inner end of the shaft lever clamped with the positioning plate is arranged in the shaft lever hole of the piston ring position conveying rod, and the inner side groove wall of the first sealing ring mounting groove is flush with the end surface of the piston ring position conveying rod.
And 2, installing a sealing ring from the conical surface end of the piston ring position conveying rod, and sleeving the sealing ring on the outer circumferential surface of the piston ring position conveying rod. And sleeving the push ring 3 on the outer circumferential surface of the piston ring position sending rod. And pushing the push ring to push the sealing ring to the first sealing ring mounting groove, so that the sealing ring falls into the first sealing ring mounting groove along the surface of the positioning plate. And finishing the process of installing the sealing ring in the first sealing ring installation groove.
And 3, extracting the positioning plate from the first sealing ring mounting groove provided with the sealing ring.
And 4, moving the shaft lever to enable a second sealing ring mounting groove on the shaft lever to expose the piston ring position sending rod, and enabling the inner side groove wall of the second sealing ring mounting groove to be flush with the end face of the piston ring position sending rod. And (3) repeating the process of the step (2) to complete the process of installing the sealing ring in the second sealing ring installation groove.
And 5, repeating the step 3 and the step 4 to finish the process of installing the sealing ring in the third sealing ring installation groove.
And then, the installation of three sealing rings on the shaft rod is completed.
According to the invention, by using the mounting tool with a specific structure, the operations of expanding, positioning, delivering and groove dropping are effectively carried out on the sealing ring, the accurate mounting of the sealing ring is ensured, and the damage of the sealing ring caused by inaccurate positioning in the manual mounting of the sealing ring is avoided.
Compared with the prior art, the sealing ring mounting groove positioning device can accurately position and send a plurality of sealing rings to each appointed sealing ring mounting groove in a grading manner, and prevents the shoulder edges of the sealing grooves from damaging the sealing rings in the mounting process.
The installation process of the sealing ring is divided into stages and refined, the expansion of the sealing ring on the piston ring position-sending rod is sequentially carried out, the positioning plate is used for determining the installation position of the sealing ring, the sealing ring is pushed to the upper part of the installation position, the sealing ring falls into the sealing ring installation groove, the processes are sequentially repeated, the installation of each sealing ring is completed, the installation process is simplified, the damage of the installation of the sealing ring caused by the fact that the sealing ring directly scratches the top edge of the sealing ring installation groove when the sealing ring is installed by other tools is avoided, and the installation quality of the sealing ring is ensured.
Drawings
Fig. 1 is a schematic structural diagram of a mounting tool for a piston rod seal ring in CN 201872136U.
Fig. 2 is a schematic structural diagram of an installation tool of a large-diameter metal-clad lip seal ring in CN 201320289218.4; wherein fig. 2a is a front view, fig. 2b is a top view, and fig. 2c is a schematic illustration of the cooperation with the workpiece.
Fig. 3 is a schematic structural diagram of a press-fitting tool for a non-elastic sealing ring in CN 201420582660.0; wherein fig. 3a is a schematic view of an initial state during operation, and fig. 3b is a schematic view of an operating state.
Fig. 4 is a schematic structural diagram of an oil cylinder combined seal ring mounting tool in CN 201820619013.0; fig. 4a is an isometric view, fig. 4b is a front view, and fig. 4c is a partial enlarged view of a portion a in fig. 4 b.
Figure 5 is an electrode seal ring installation tool in CN 201821239610.7; wherein fig. 5a is a front view and fig. 5b is a side view.
FIG. 6 is a schematic view of a positioning plate according to the present invention;
FIG. 7 is a schematic structural view of an expansion ring index bar according to the present invention;
FIG. 8 is a schematic view of the push ring of the present invention;
FIG. 9 is a schematic view of the construction of the shaft of the present invention;
FIG. 10 is a schematic view of the expansion of the present invention;
FIG. 11 is a schematic illustration of the positioning of the present invention;
FIG. 12 is a schematic illustration of the bit delivery of the present invention;
fig. 13 is a schematic view of a drop chute of the present invention.
Fig. 14 is a schematic diagram of damage to a prior art seal ring.
In the figure: 1. positioning a plate; 2. a push ring; 3. a shaft lever; 4. a sealing ring mounting groove; 5. an expansion ring position sending rod; 6. and (5) sealing rings.
Detailed Description
The embodiment is a tool for installing a sealing ring on a shaft rod, and the tool comprises a positioning plate 1, a push ring 2 and an expansion ring position sending rod 5, wherein the positioning plate, the push ring and the expansion ring position sending rod are matched to finish positioning and installation of the sealing ring 6.
The shaft rod 3 of the sealing ring to be installed in the embodiment is in a rod shape, the diameter of the shaft rod is 10mm, and the axial length of the shaft rod is 23mm. 3 sealing ring mounting grooves 4 are distributed on the outer circumferential surface of the shaft rod, and are respectively a first sealing ring mounting groove, a second sealing ring mounting groove and a third sealing ring mounting groove in sequence; the diameter of the groove bottom of each sealing ring mounting groove is 7mm.
The push ring is sleeved on the outer circumferential surface of the piston ring position feeding rod 5 and is positioned at the tail end of the piston ring position feeding rod; the positioning plate 1 is positioned at the tail end of the piston ring position feeding rod and is embedded into a sealing ring mounting groove 4 on the outer circumferential surface of a shaft lever 3 arranged in the piston ring position feeding rod.
The locating plate 1 is made of a rectangular organic glass plate with the thickness of 0.3 mm. A U-shaped groove is formed on one short edge of the positioning plate, and the bottom of the U-shaped groove is in a semi-arc shape. The radius of the semicircular arc is the same as the radius of the groove bottom of the sealing groove on the shaft lever 3; when the positioning plate is embedded into the sealing groove, the positioning plate and the sealing groove are in clearance fit; the depth of the U-shaped groove is more than or equal to the diameter of the sealing groove bottom of the shaft lever 3, the depth of the sealing groove and the diameter of the section of the sealing ring. In the embodiment, the length of the positioning plate is 21mm, and the width of the positioning plate is 15mm; the radius of the circular arc of the U-shaped groove is 3.6mm, and the depth is 13.6mm. The edges of the positioning plate 1 are processed by rounding.
The piston ring position sending rod 2 is a hollow revolving body. One end of the piston ring position-sending rod is provided with an exhaust hole, and the other end is provided with a shaft rod hole, and the exhaust hole is communicated with the shaft rod hole. The inner diameter of the shaft rod hole is the same as the outer diameter of the shaft rod 3, the shaft rod hole and the shaft rod are in clearance fit, and the clearance is 0.01-0.05 mm. The axial length of the shaft bore is the same as the axial length of the shaft. The outer circumferential surface of the end of the piston ring position-sending rod with the exhaust hole is a conical surface, and the minimum diameter of the outer circumferential surface is smaller than the inner diameter of the sealing ring, so that the sealing ring is conveniently sleeved.
In this embodiment, the piston ring position-sending rod 2 is made of aluminum alloy, and the total length is 45mm. The diameter of the shaft rod is 13mm, and the length of the shaft rod is 23mm.
The push ring 2 is made of aluminum alloy and is annular. The inner diameter of the push ring is the same as the maximum outer diameter of the piston ring position sending rod 2; the outer diameter of the push ring 2 is 6mm larger than the inner diameter of the push ring.
The embodiment also provides a method for installing the sealing ring by using the tool, which comprises the following specific processes:
and step 1, clamping a U-shaped groove on the positioning plate 1 in a first sealing ring mounting groove at the outer end of the shaft rod. And (3) installing the inner end of the shaft rod with the positioning plate clamped into the shaft rod hole of the piston ring position conveying rod 2, and enabling the inner side groove wall of the first sealing ring installation groove to be flush with the end face of the piston ring position conveying rod.
And 2, installing a sealing ring 6 from the conical surface end of the piston ring position conveying rod 2, and sleeving the sealing ring on the outer circumferential surface of the piston ring position conveying rod. And sleeving the push ring 2 on the outer circumferential surface of the piston ring position feeding rod. The pushing ring is pushed to push the sealing ring to the first sealing ring mounting groove, so that the sealing ring falls into the first sealing ring mounting groove along the surface of the positioning plate. And finishing the process of installing the sealing ring in the first sealing ring installation groove.
And 3, extracting the positioning plate from the first sealing ring mounting groove provided with the sealing ring.
And 4, moving the shaft lever to enable the second sealing ring mounting groove on the shaft lever to expose the piston ring position conveying rod, and enabling the inner side groove wall of the second sealing ring mounting groove to be flush with the end face of the piston ring position conveying rod. And (5) repeating the process of the step (2) to finish the process of installing the sealing ring in the second sealing ring installation groove.
And 5, repeating the step 3 and the step 4 to finish the process of installing the sealing ring in the third sealing ring installation groove.
And then, the installation of three sealing rings on the shaft rod is completed.
Claims (4)
1. A tool for installing a sealing ring on a shaft lever is rod-shaped, wherein 3 sealing ring installation grooves are distributed on the outer circumferential surface of the shaft lever and are respectively a first sealing ring installation groove, a second sealing ring installation groove and a third sealing ring installation groove in sequence; the sealing ring positioning device is characterized by comprising a positioning plate, a push ring and an expansion ring position sending rod, wherein the positioning plate, the push ring and the expansion ring position sending rod are matched for use to complete positioning and installation of the sealing ring; wherein, the push ring is sleeved on the outer circumferential surface of the tail end of the piston ring position feeding rod; the positioning plate is positioned at the end face of the tail end of the piston ring position feeding rod and is embedded into a sealing ring mounting groove on the outer circumferential surface of the shaft lever in the piston ring position feeding rod;
the positioning plate is a rectangular plate, a U-shaped groove is formed in one short edge of the positioning plate, and the bottom of the U-shaped groove is in a semi-arc shape; the radius of the semicircular arc is the same as the radius of the groove bottom of the sealing groove on the shaft rod; when the positioning plate is embedded into the sealing groove, the positioning plate and the sealing groove are in clearance fit; the depth of the U-shaped groove is more than or equal to the diameter of the position of the shaft lever sealing groove, the depth of the sealing groove and the diameter of the section of the sealing ring;
one end of the piston ring position sending rod is provided with an exhaust hole, and the other end of the piston ring position sending rod is provided with a shaft rod hole; the exhaust hole is communicated with the shaft rod hole; the inner diameter of the shaft rod hole is the same as the outer diameter of the shaft rod, and the shaft rod hole and the shaft rod are in clearance fit, wherein the clearance is 0.01-0.05 mm; the axial length of the shaft bore is the same as the axial length of the shaft.
2. The tooling for installing a seal ring on a shaft according to claim 1, wherein the outer circumferential surface of the end of the piston ring position-sending rod having the vent hole is a tapered surface, and the minimum diameter of the tapered surface is smaller than the inner diameter of the seal ring, so as to facilitate the sleeving of the seal ring.
3. The tool for installing the sealing ring on the shaft rod according to claim 1, wherein the inner diameter of the push ring is the same as the maximum outer diameter of the piston ring position sending rod; the outer diameter of the push ring is 6mm larger than the inner diameter of the push ring.
4. A method for installing a seal ring on a shaft using the tool of claim 1, comprising the steps of:
step 1, clamping a U-shaped groove on the positioning plate in a first sealing ring mounting groove at the outer end of the shaft lever of the sealing ring to be mounted; the inner end of the shaft lever clamped with the positioning plate is arranged in a shaft lever hole of the piston ring position conveying rod, and the inner side groove wall of the first sealing ring mounting groove is flush with the end face of the piston ring position conveying rod;
step 2, a sealing ring is arranged from the conical surface end of the piston ring position conveying rod, so that the sealing ring is sleeved on the outer circumferential surface of the piston ring position conveying rod; sleeving the push ring on the outer circumferential surface of the piston ring position sending rod; pushing the push ring to push the sealing ring to the first sealing ring mounting groove, so that the sealing ring falls into the first sealing ring mounting groove along the surface of the positioning plate; completing the process of installing the sealing ring in the first sealing ring installation groove;
step 3, extracting the positioning plate from the first sealing ring mounting groove provided with the sealing ring;
step 4, moving the shaft lever to enable a second sealing ring mounting groove on the shaft lever to expose the piston ring position conveying rod, and enabling the inner side groove wall of the second sealing ring mounting groove to be flush with the end face of the piston ring position conveying rod; repeating the process of the step 2 to finish the process of installing the sealing ring in the second sealing ring installation groove;
step 5, repeating the step 3 and the step 4 to complete the process of installing the sealing ring in the third sealing ring installation groove; the installation of three sealing rings on the shaft lever is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110773068.3A CN113561122B (en) | 2021-07-08 | 2021-07-08 | Tool for mounting sealing ring on shaft lever and mounting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110773068.3A CN113561122B (en) | 2021-07-08 | 2021-07-08 | Tool for mounting sealing ring on shaft lever and mounting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113561122A CN113561122A (en) | 2021-10-29 |
| CN113561122B true CN113561122B (en) | 2023-03-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110773068.3A Active CN113561122B (en) | 2021-07-08 | 2021-07-08 | Tool for mounting sealing ring on shaft lever and mounting method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202448086U (en) * | 2011-12-31 | 2012-09-26 | 上海麦特密封件有限公司 | Mounting tool for sealing ring |
| CN203566622U (en) * | 2013-11-14 | 2014-04-30 | 内蒙古第一机械集团有限公司 | Elastic press-fitting device of seal ring of piston |
| CN105364776A (en) * | 2015-12-18 | 2016-03-02 | 四川优机实业股份有限公司 | Piston sealing element assembly method and device |
| CN109759986A (en) * | 2019-02-19 | 2019-05-17 | 武汉工程大学 | A kind of assembly device of gas control valve core Glais ring |
| CN210335777U (en) * | 2019-06-11 | 2020-04-17 | 江西昌河航空工业有限公司 | O-shaped sealing ring mounting tool |
| CN211103704U (en) * | 2019-10-10 | 2020-07-28 | 任袆菲 | Device convenient to installation glary circle |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6694591B2 (en) * | 2001-11-26 | 2004-02-24 | Acadia Polymers, Inc. | Systems and methods for applying ring shaped seal members |
-
2021
- 2021-07-08 CN CN202110773068.3A patent/CN113561122B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202448086U (en) * | 2011-12-31 | 2012-09-26 | 上海麦特密封件有限公司 | Mounting tool for sealing ring |
| CN203566622U (en) * | 2013-11-14 | 2014-04-30 | 内蒙古第一机械集团有限公司 | Elastic press-fitting device of seal ring of piston |
| CN105364776A (en) * | 2015-12-18 | 2016-03-02 | 四川优机实业股份有限公司 | Piston sealing element assembly method and device |
| CN109759986A (en) * | 2019-02-19 | 2019-05-17 | 武汉工程大学 | A kind of assembly device of gas control valve core Glais ring |
| CN210335777U (en) * | 2019-06-11 | 2020-04-17 | 江西昌河航空工业有限公司 | O-shaped sealing ring mounting tool |
| CN211103704U (en) * | 2019-10-10 | 2020-07-28 | 任袆菲 | Device convenient to installation glary circle |
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| CN113561122A (en) | 2021-10-29 |
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