CN210335004U - Piston ring assembling device - Google Patents
Piston ring assembling device Download PDFInfo
- Publication number
- CN210335004U CN210335004U CN201920618170.4U CN201920618170U CN210335004U CN 210335004 U CN210335004 U CN 210335004U CN 201920618170 U CN201920618170 U CN 201920618170U CN 210335004 U CN210335004 U CN 210335004U
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- China
- Prior art keywords
- piston
- piston ring
- guide rod
- feeding part
- guide sleeve
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 238000006073 displacement reaction Methods 0.000 claims description 17
- 238000009434 installation Methods 0.000 abstract description 13
- 230000001771 impaired effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 210000000080 chela (arthropods) Anatomy 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
The utility model discloses a piston ring assembling device, which comprises a frame, wherein the upper end of the frame is provided with a feeding part, a piston ring feeding part and a piston feeding part, the piston ring feeding part is positioned above the feeding part, the piston feeding part is positioned on one side of the piston ring feeding part, the piston ring feeding device is provided with the guide sleeve with the conical surface structure, the inner diameter of the piston ring is larger than the outer diameter of the piston, the piston ring can be further quickly sleeved on the piston, in addition, because the size specification of the guide sleeve can be selected according to the actual requirement, the opening expanding degree of the piston ring can be controlled, the piston ring can be fast and effectively sleeved on the piston while the performance of the piston ring is ensured, so can effectively control the mouth degree that rises of piston ring, avoid because of the too big piston ring that leads to of mouth that rises is impaired, improve installation quality, because install in proper order moreover, and then the risk that neglected loading can not appear.
Description
Technical Field
The utility model relates to a piston assembly equipment technical field specifically is a piston ring assembly quality.
Background
In a piston type air compressor or a piston type engine, a piston is required to be used or reciprocate in a cylinder, and in the reciprocating process of the piston, the sealing performance of the piston and the inner wall of the cylinder needs to be ensured, so that one or more piston rings are arranged at the front end of the piston.
However, in the prior art, the installation of piston ring is accomplished through artifical more, prop open the piston ring through jump ring pincers promptly, then the piston ring after will strutting cup joints on the piston, but because jump ring pincers dynamics is difficult to control, when exerting oneself undersize, the piston ring rises the mouth less, the piston ring can't be installed on the piston, but when exerting oneself excessively, the piston rises the mouth great, too big mouth that rises can lead to the piston ring to warp, can appear the fracture when serious, therefore because the damage appears at the piston ring inboard, difficult discovery, the guide can lead to the flow of defective products, make the actual yields of product reduce, the actual average life of piston reduces.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a piston ring assembly quality to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
the piston ring assembling device comprises a rack, wherein a feeding part, a piston ring feeding part and a piston feeding part are arranged at the upper end of the rack, the piston ring feeding part is positioned above the feeding part, and the piston feeding part is positioned on one side of the piston ring feeding part;
the feeding part comprises a reciprocating mechanism fixedly arranged at the upper end of the rack, a push plate is arranged at the upper end of the reciprocating mechanism, and the push plate is horizontally connected with the rack in a sliding manner through the reciprocating mechanism;
the piston ring feeding part comprises a guide rod fixedly connected with the rack, the axis of the guide rod is parallel to the reciprocating direction of the push plate, and the push plate is sleeved on the guide rod;
the piston feeding part comprises a planetary disc assembly and a piston mounting seat which is arranged on the planetary disc assembly and close to the guide rod, and the planetary disc assembly is horizontally connected with the rack in a sliding mode.
As a further aspect of the present invention: the reciprocating mechanism is one of a screw rod nut mechanism, a linear motor, a hydraulic cylinder and an air cylinder.
As a further aspect of the present invention: reciprocating motion mechanism includes that the level is arranged the lead screw of frame upper end and cup joint nut on the lead screw, be equipped with in the frame and be used for driving the lead screw motor that the lead screw arrived, the nut with frame horizontal sliding connection, the slip table set firmly in the nut upper end.
As a further aspect of the present invention: the sliding table is characterized in that a touch plate is arranged on one side of the sliding table, a limiting block is arranged at the upper end of the rack and comprises a full-load limiting block far away from the piston feeding part and an idle-load limiting block close to one side of the piston feeding part, and the touch plate is horizontally arranged between the full-load limiting block and the idle-load limiting block in a sliding mode.
As a further aspect of the present invention: the guide rod is fixedly connected with the rack through the guide rod seat.
As a further aspect of the present invention: the guide sleeve is detachably connected to one side, close to the piston feeding portion, of the guide rod, the guide sleeve is of a conical structure, the guide sleeve comprises a conical surface, the radius of the cross section of the conical surface is gradually increased from one side, close to the guide rod, to one side, far away from the guide sleeve, the radius of the cross section of one end, close to the guide rod, of the conical surface is the same as that of the cross section of the guide rod, and the radius of the cross section of one end, close to the piston feeding portion, of the conical surface is not.
As a further aspect of the present invention: one end of the guide sleeve, which is close to the piston feeding part, is inwards sunken to form a groove for accommodating the end part of the piston.
As a further aspect of the present invention: the guide arm is close to the one end of guide pin bushing is equipped with first spread groove, the guide pin bushing is close to the one end of guide arm is equipped with the second spread groove, the guide arm with the guide pin bushing passes through first spread groove and second spread groove joint.
As a further aspect of the present invention: the guide rod is internally provided with a first containing cavity parallel to the guide rod, the guide sleeve is internally provided with a second containing cavity, the first containing cavity is internally spliced with a displacement sensing mechanism, one end of the displacement sensing mechanism, which is close to the guide sleeve, penetrates through the first containing cavity and is spliced in the second containing cavity, and the second containing cavity penetrates through the guide sleeve.
As a further aspect of the present invention: the piston mounting seats are arranged in a plurality, the piston mounting seats are circumferentially arranged on one side, close to the guide rod, of the planetary plate assembly, and the axes of the piston mounting seats are sequentially positioned at the positions coaxial with the guide rod along with the rotation of the planetary plate assembly
Compared with the prior art, the beneficial effects of the utility model are that:
1. according to the installation equipment, a large number of piston rings can be sleeved on the guide rod at one time by arranging the guide rod for feeding, and then the piston rings on the guide rod are pushed by the push plate to be sequentially sleeved on the piston rings, so that the installation equipment can continuously work, the production efficiency is improved, the limiting block is arranged on the workbench, the no-load position and the full-load position of the guide rod are limited, and the limiting state of the guide rod can be effectively marked and reminded;
2. the application has the advantages that the guide sleeve with the conical surface structure is arranged, the radius of one end of the guide sleeve is the same as that of the guide rod, so that the piston ring can be rapidly transferred onto the guide sleeve from the guide rod, the piston can be inserted into the other end of the guide sleeve, when one end of the piston ring is connected to one end of the guide sleeve close to the piston, the inner diameter of the piston ring is larger than the outer diameter of the piston, further, the piston ring can be fast sleeved on the piston, in addition, the dimension specification of the guide sleeve can be selected according to the dimension specification of the piston in the actual production, therefore, the opening expanding degree of the piston ring can be accurately controlled, the piston ring can be fast and effectively sleeved on the piston while the performance of the piston ring is ensured, so can effectively control the mouth degree that rises of piston ring, avoid because of the too big piston ring that leads to of mouth that rises is impaired, improve installation quality, because install in proper order moreover, and then the risk that neglected loading can not appear.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a partial structure of the working portion of the present invention;
FIG. 3 is a partial cross-sectional view of the guide bar of the present invention;
fig. 4 is a cross-sectional view of the guide sleeve of the present invention;
FIG. 5 is a schematic view of the structure of the piston loading part of the present invention;
fig. 6 is a partial cross-sectional view of the working portion of the present invention.
In the figure: the piston ring loading device comprises a machine frame 1, a workbench 11, a feeding part 2, a reciprocating mechanism 21, a sliding table 22, a push plate 23, a limiting block 24, a touch plate 25, a piston ring loading part 3, a guide rod seat 31, a guide rod 32, a first accommodating cavity 33, a displacement sensing mechanism 34, a first connecting groove 35, a guide sleeve 4, a conical surface 41, a groove 42, a second connecting groove 43, a second accommodating cavity 44, a piston loading part 5, a planetary plate assembly 51, a piston mounting seat 52, a piston ring 6, a piston 7 and a piston ring mounting groove 71.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-6, in an embodiment of the present invention, a piston ring assembling apparatus includes a frame 1, the frame 1 includes a male tab 11, a feeding portion 2, a piston ring feeding portion 3, and a piston feeding portion 5 are disposed at an upper end of a working table 11, the piston ring feeding portion 3 is located above the feeding portion 2, and the piston feeding portion 5 is located at one side of the piston ring feeding portion 3;
the feeding part 2 comprises a reciprocating mechanism 21 fixedly arranged at the upper end of the frame 1, the reciprocating mechanism 21 is one of a screw rod nut mechanism, a linear motor, a hydraulic cylinder and a cylinder, in the embodiment, the reciprocating mechanism is a screw rod nut mechanism, the reciprocating mechanism 21 comprises a screw rod horizontally arranged at the upper end of the workbench 11 and a nut sleeved on the screw rod, the workbench 11 is provided with a screw rod motor for driving the screw rod to rotate, the nut is horizontally and slidably connected with the workbench 11, the sliding table 22 is fixedly arranged at the upper end of the nut, further, the nut can be driven to horizontally slide on the workbench 11 through the rotation of the screw rod, the sliding table 22 is driven to horizontally slide on the workbench 11 through the nut, one side of the sliding table 22 is provided with a touch plate 25, the upper end of the workbench 11 is provided with a limit block 24, the limit block 24 comprises a full-load limit block far away from the piston, the horizontal sliding of touch panel 25 sets up between full-load stopper and unloaded stopper, and then can carry on spacingly to the horizontal motion of slip table 22, and in this embodiment, full-load stopper all is equipped with the contact sensing device with the one side that unloaded stopper is close to touch panel 25, sends the feedback when the touch panel contacts unloaded stopper or full-load stopper. The upper end of the reciprocating mechanism 21 is provided with a push plate 23, and the push plate 23 is horizontally connected with the workbench 11 in a sliding manner through the reciprocating mechanism 21;
the piston ring feeding part 3 comprises a guide rod 32 fixedly connected with the rack 1, the upper end of the workbench 11 is provided with a guide rod seat 31, the guide rod seat 31 is positioned at one end of the reciprocating meeting mechanism 21, the guide rod 32 is fixedly connected on the guide rod seat 31 to form a cantilever structure, the piston ring 6 is sleeved on the guide rod 32, the piston ring 6 is stored on the guide rod 32, the axis of the guide rod 32 is parallel to the reciprocating direction of the push plate 23, the push plate 23 is sleeved on the guide rod 32, and the piston ring 6 can be pushed to move on the guide rod 32 through the push plate 23, so that the feeding process is completed;
the piston upper feeding part 5 comprises a planetary disc assembly 51 and a plurality of piston mounting seats 52 arranged on the planetary disc assembly 51 and close to the guide rod 32, the planetary disc assembly 51 is horizontally connected with the rack 1 in a sliding manner, meanwhile, the planetary disc assembly 51 can rotate around the axis of the planetary disc assembly, the plurality of piston mounting seats 52 are arranged, all the piston mounting seats 52 are circumferentially arranged on one side, close to the guide rod 32, of the planetary disc assembly 51, the axes of the plurality of piston mounting seats 52 are sequentially positioned at positions coaxial with the guide rod 32 along with the rotation of the planetary disc assembly 51, so that the pistons 7 on the piston mounting seats 52 at different positions on the planetary disc assembly 51 can be aligned with the guide rod 32 through the rotation of the planetary disc assembly 51, and further piston rings are mounted on the aligned pistons 7;
one side of the guide rod 32 close to the piston charging part 5 is detachably connected with a guide sleeve 4, one end of the guide rod 32 close to the guide sleeve 4 is provided with a first connecting groove 35, one end of the guide sleeve 4 close to the guide rod 32 is provided with a second connecting groove 43, the guide rod 32 and the guide sleeve 4 are clamped and connected through the first connecting groove 35 and the second connecting groove 43, one end of the guide sleeve 4 close to the piston charging part 5 is recessed inwards to form a groove 42 for accommodating the end part of the piston 7, and then the piston 7 can be inserted into the groove 42;
the guide sleeve 4 is of a conical structure, the guide sleeve 4 comprises a conical surface 41, the section radius of the conical surface 41 is gradually increased from one end close to the guide rod 32 to the end far from the guide sleeve 32, the section radius of one end, close to the guide rod 32, of the conical surface 41 is the same as that of the guide rod 32, and the section radius of one end, close to the piston charging part 5, of the conical surface 41 is not smaller than that of the end part of the piston, in the embodiment, the radius of one end, close to the piston 7, of the conical surface 41 is larger than that of the piston 7, so that the piston 7 can be inserted into the groove 42 on the guide sleeve 4, namely, the radius of one end, connected with the guide rod 32, of the conical surface 41 is smaller, and the radius of one end, close to the piston mounting seat 52, is larger, when the piston ring 6 is pushed by the push plate 23 to move from the guide rod 32 to the piston 7, the, the inner diameter of the piston ring 6 is not smaller than the end face radius of the piston 7, so that the piston ring 6 can be easily pushed onto the piston 7 and then continuously moves on the piston 7 until the piston ring is clamped in the piston ring mounting groove 71.
In addition, a first accommodating cavity 33 parallel to the guide rod 32 is arranged in the guide rod 32, a second accommodating cavity 44 is arranged in the guide sleeve 4, a displacement sensing mechanism 34 is inserted in the first accommodating cavity 33, one end of the displacement sensing mechanism 34 close to the guide sleeve 4 penetrates through the first accommodating cavity 33 and is inserted in the second accommodating cavity 44, the second accommodating cavity 44 penetrates through the guide sleeve 4, the displacement sensing mechanism 34 penetrates through the first accommodating cavity 33 and the second accommodating cavity 44 and reaches the end part of the second accommodating cavity 44 and is used for sensing the piston 7 clamped in the groove 42, when the piston 7 is clamped in the groove 42, the displacement sensing mechanism 34 can be extruded and further can be used for marking whether clamping is completed or not, in the embodiment, the displacement sensing mechanism 34 is a displacement sensor, therefore when the piston 7 moves in the direction close to the displacement sensor in the groove 42, the displacement sensor can feed back a displacement signal, and the unique parameter detected by the displacement sensor can reflect the moving distance of the piston 7 in the groove 42, and the degree of connection between the piston 7 and the guide sleeve 4 can be reflected.
When the utility model is used, firstly, the piston rings 6 are sequentially sleeved on the guide rod 32, and the push plate 23 on the guide rod 32 is pushed to move towards one end far away from the piston feeding part 5, when the sliding table 22 at the lower end of the push plate 23 moves to the limit position, namely, the touch plate 25 contacts with the full-load limiting block, the piston rings 6 are fully loaded on the guide rod 32 at the moment, then the piston rings 6 are stopped being sleeved on the guide rod 32, the guide sleeve 4 is connected to one end of the guide rod 32 close to the piston feeding part 5, meanwhile, the displacement sensing mechanism 34 is clamped in the second containing cavity 44 in the guide sleeve 4, then the feeding and installation preparation of the piston rings 6 are completed, then the screw rod motor in the reciprocating mechanism 21 and the planet disk assembly 51 in the piston feeding part 5 are started, firstly, the planet disk assembly 51 rotates, one piston 7 on the planet disk assembly 51 rotates to the position coaxial with the guide rod 32, then the piston mounting seat 52, the piston 7 on the piston mounting seat 52 is inserted into the groove 42 on the guide sleeve 4, in the process that the piston 7 is gradually inserted into the groove 42, the piston 7 can contact and continuously extrude the displacement sensing mechanism 34, when a certain pressure threshold is reached, the piston 7 is inserted in place, namely, the end surface of the piston 7 contacts with the bottom surface of the groove 42, the step surface of the piston ring mounting groove 71 on the piston 7, which is close to the guide rod 32, is flush with the end surface of the guide sleeve 4, at the moment, the movement of the piston 7 is stopped, then the lead screw is driven by the lead screw motor to rotate, and the push plate 23 can be driven to move towards the direction close to the piston 7, in the moving process of the push plate 23, all the piston rings 6 on the guide rod 32 are pushed to move towards the direction close to the piston 7, so that the piston ring 6 closest to the piston 7 moves from the guide rod 32 to the conical surface, because the radius of the conical surface 41 is larger closer to the piston 7, the inner diameter of the piston ring 6 is continuously expanded in the moving process until the piston ring 6 moves to the end of the conical surface 41, at this time, the inner diameter of the piston ring 6 is larger than the outer diameter of the piston 7, and because the end surface of the guide sleeve 4 is flush with one end of the piston ring installation groove 71 at this time, the piston ring 6 moves from the guide sleeve 4 to the piston 7 under the pushing of the push plate 23 and is clamped in the piston ring installation groove 71, at this time, the movement of the push plate 23 is stopped, then the planetary disc assembly 51 moves in the direction far away from the guide rod 32 until the piston 7 is separated from the guide sleeve 4, then the planetary disc assembly 51 is rotated to enable the piston 7 which is installed at present to be far away from the guide sleeve 4 and enable the next piston 7 which is not installed to rotate to be coaxial with the guide rod 32, thereby completing the installation of one, meanwhile, in the process of installing the piston ring 6 on the current piston 7, the piston 7 which is installed in front is taken down from the piston installation seat 52, the piston 7 which is not installed is installed on the corresponding vacant piston installation seat 52, and then the piston ring 6 can be continuously installed, along with the continuous installation, the piston ring 6 on the guide rod 32 is gradually consumed, when the touch plate 25 contacts the no-load limiting block, the piston ring 6 on the guide rod 32 is insufficient, the push plate 23 cannot push the piston ring 6 away from the guide sleeve 4, and at the moment, the guide rod 32 is in the no-load state, then the planetary disc assembly 51 and the reciprocating linear motion mechanism 21 are stopped, the guide sleeve 4 is detached, and then the piston ring 6 can be filled on the guide rod 32 again, and the installation work of the piston ring 6 can be continuously carried out by repeating the steps.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The piston ring assembling device comprises a rack (1) and is characterized in that a feeding part (2), a piston ring feeding part (3) and a piston feeding part (5) are arranged at the upper end of the rack (1), the piston ring feeding part (3) is positioned above the feeding part (2), and the piston feeding part (5) is positioned on one side of the piston ring feeding part (3);
the feeding part (2) comprises a reciprocating mechanism (21) fixedly arranged at the upper end of the rack (1), a push plate (23) is arranged at the upper end of the reciprocating mechanism (21), and the push plate (23) is horizontally connected with the rack (1) in a sliding manner through the reciprocating mechanism (21);
the piston ring feeding part (3) comprises a guide rod (32) fixedly connected with the rack (1), the axis of the guide rod (32) is parallel to the reciprocating direction of the push plate (23), and the push plate (23) is sleeved on the guide rod (32);
the piston feeding part (5) comprises a planet disk assembly (51) and a piston mounting seat (52) which is arranged on the planet disk assembly (51) and close to the guide rod (32), and the planet disk assembly (51) is horizontally connected with the rack (1) in a sliding mode.
2. A piston ring assembling apparatus according to claim 1, wherein said reciprocating mechanism (21) is one of a screw-nut mechanism, a linear motor, a hydraulic cylinder, and a pneumatic cylinder.
3. The piston ring assembling device according to claim 1, wherein the reciprocating mechanism (21) comprises a lead screw horizontally arranged at the upper end of the rack (1) and a nut sleeved on the lead screw, a lead screw motor for driving the lead screw to rotate is arranged on the rack (1), the nut is horizontally and slidably connected with the rack (1), and a sliding table (22) is fixedly arranged at the upper end of the nut.
4. The piston ring assembling device as claimed in claim 3, wherein a touch plate (25) is arranged on one side of the sliding table (22), a limit block (24) is arranged at the upper end of the frame (1), the limit block (24) comprises a full-load limit block far away from the piston feeding part (5) and an empty-load limit block close to one side of the piston feeding part (5), and the touch plate (25) is horizontally and slidably arranged between the full-load limit block and the empty-load limit block.
5. Piston ring assembly device according to claim 1, characterised in that the guide rod (32) is fixedly connected to the machine frame (1) by means of a guide rod seat (31).
6. The piston ring assembling device according to claim 1, wherein a guide sleeve (4) is detachably connected to one side of the guide rod (32) close to the piston loading portion (5), the guide sleeve (4) is of a conical structure, the guide sleeve (4) comprises a conical surface (41) with a cross-sectional radius gradually increasing from one side close to the guide rod (32) to one side far away from the guide sleeve (4), the cross-sectional radius of one end, close to the guide rod (32), of the conical surface (41) is the same as that of the guide rod (32), and the cross-sectional radius of one end, close to the piston loading portion (5), of the conical surface (41) is not smaller than that of the end of the piston.
7. A piston ring assembly device according to claim 6, characterised in that the end of the guide sleeve (4) adjacent to the piston head (5) is recessed inwardly to form a recess (42) for receiving the piston end.
8. A piston ring assembling apparatus according to claim 6, wherein one end of said guide rod (32) near said guide sleeve (4) is provided with a first connecting groove (35), one end of said guide sleeve (4) near said guide rod (32) is provided with a second connecting groove (43), and said guide rod (32) and said guide sleeve (4) are clamped by said first connecting groove (35) and said second connecting groove (43).
9. The piston ring assembling device of claim 6, wherein a first accommodating cavity (33) parallel to the guide rod (32) is arranged in the guide rod (32), a second accommodating cavity (44) is arranged in the guide sleeve (4), a displacement sensing mechanism (34) is inserted in the first accommodating cavity (33), one end, close to the guide sleeve (4), of the displacement sensing mechanism (34) penetrates through the first accommodating cavity (33) and is inserted in the second accommodating cavity (44), and the second accommodating cavity (44) penetrates through the guide sleeve (4).
10. A piston ring assembling apparatus according to claim 1, wherein said plurality of piston mounting seats (52) are provided, all said piston mounting seats (52) are circumferentially provided on said planetary disk assembly (51) at a side close to said guide rod (32), and the axes of said plurality of piston mounting seats (52) are sequentially located coaxially with said guide rod (32) in accordance with the rotation of said planetary disk assembly (51).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920618170.4U CN210335004U (en) | 2019-04-30 | 2019-04-30 | Piston ring assembling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920618170.4U CN210335004U (en) | 2019-04-30 | 2019-04-30 | Piston ring assembling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210335004U true CN210335004U (en) | 2020-04-17 |
Family
ID=70181012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920618170.4U Expired - Fee Related CN210335004U (en) | 2019-04-30 | 2019-04-30 | Piston ring assembling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210335004U (en) |
-
2019
- 2019-04-30 CN CN201920618170.4U patent/CN210335004U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200417 |