CN202708063U - Inner snap ring type hydraulic cylinder sealing structure, hydraulic cylinder and concrete pump truck - Google Patents
Inner snap ring type hydraulic cylinder sealing structure, hydraulic cylinder and concrete pump truck Download PDFInfo
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- CN202708063U CN202708063U CN 201220342249 CN201220342249U CN202708063U CN 202708063 U CN202708063 U CN 202708063U CN 201220342249 CN201220342249 CN 201220342249 CN 201220342249 U CN201220342249 U CN 201220342249U CN 202708063 U CN202708063 U CN 202708063U
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- collar
- guide sleeve
- snap ring
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Abstract
The utility model provides an inner snap ring type hydraulic cylinder sealing structure which comprises a cylinder, a guiding sleeve, an inner snap ring, a sleeve ring and a fastener, wherein a first sealing element is arranged between the guiding sleeve and the sleeve ring and a second sealing element is arranged between the cylinder and the sleeve ring. The utility model also provides a hydraulic cylinder with the sealing structure and a concrete pump truck containing the hydraulic cylinder. According to the technical scheme provided by the utility model, the structure is simple, the processing and mounting are convenient and the cost is low; an outside medium is effectively prevented from entering into the gaps among the inner snap ring, the sleeve ring, the cylinder and the guiding sleeve, so that a hydraulic medium in the hydraulic cylinder is prevented from being polluted; and the inner snap ring, the sleeve ring and the fastener are difficult to be rusted and the guiding sleeve is convenient to detach.
Description
Technical field
The utility model relates to the hydraulics field, more particularly, relates to the sealing configuration of interior snap ring jointing type oil hydraulic cylinder, the oil hydraulic cylinder with sealing structure and concrete mixer.
Background technique
At present, the structure of interior clasp type oil hydraulic cylinder, as shown in Figure 1, comprise cylinder barrel 1, be installed in described cylinder barrel end guide sleeve 2, connect described cylinder barrel 1 and the interior snap ring 3 of described guide sleeve 2 and the collar 4 that between described cylinder barrel 1 and described guide sleeve 2, is provided for locating described interior snap ring 3, and by fixed block 5 the described collar 4 is fixed on the described guide sleeve 2.
Above-mentioned, there are certain interval each other in the cylinder barrel of interior snap ring jointing type oil hydraulic cylinder, guide sleeve, interior snap ring and the collar, enter oil hydraulic cylinder for preventing the extraneous media such as water along this gap place, need take waterproof measure.The waterproof type of taking is at present only considered the gap between guide sleeve and the cylinder body, and does not consider the gap between interior snap ring and cylinder barrel and the guide sleeve and the gap between the collar and cylinder barrel and the guide sleeve.The sealing configuration of interior snap ring jointing type oil hydraulic cylinder as shown in Figure 1, this mode is to open sealed groove in the outer wall of guide sleeve 2, the 4th Sealing 14 is set in the sealing groove, when being used for preventing that pressure oil leaks in the oil hydraulic cylinder rod chamber, prevent that extraneous water and dust etc. from entering the oil hydraulic cylinder rod chamber, it is existing interior snap ring jointing type oil hydraulic cylinder, only between guide sleeve 2 and cylinder barrel 1, be provided with static seal structure, and not between interior snap ring 3 and cylinder barrel 1 and guide sleeve 2, and between the collar 4 and cylinder barrel 1 and the guide sleeve 2 sealing is set.
Above-mentioned prior art, the main defective that exists is: for the water in the external world and dust etc. can enter gap between interior snap ring 3 and cylinder barrel 1 and the guide sleeve 2, cause corrosion, the dismounting difficulty of increase guide sleeve.
The model utility content
In order to solve the problems of the technologies described above, the utility model provides a kind of novel hydraulic cylinder sealing structure.Simultaneously, the utility model also provides a kind of oil hydraulic cylinder with sealing structure, and a kind of concrete mixer with this oil hydraulic cylinder.
The utility model provides a kind of interior clasp type hydraulic cylinder sealing structure, comprises cylinder barrel, guide sleeve, interior snap ring, the collar and fixed block, is provided with the first Sealing at described guide sleeve and cover interannular.
In the technique scheme, between guide sleeve and the collar, be provided with the first Sealing, can prevent that extraneous water from infiltrating oil cylinder between guide sleeve and the collar, thereby can prevent corrosion and to the pollution of hydraulic oil.
In above-mentioned arbitrary technological scheme, preferably, also be provided with the second Sealing at described cylinder barrel and described cover interannular.The second Sealing is set between cylinder barrel and the collar, can further improves sealing effect.
In above-mentioned arbitrary technological scheme, preferably, described the first Sealing is arranged between the end face of the end face of described guide sleeve and the collar.Described the first Sealing is set between the end face of guide sleeve and the collar, then can improves the efficient of sealing, can prevent simultaneously that also sealing infiltrates from fixed block.
In above-mentioned arbitrary technological scheme, preferably, described the first Sealing is arranged between the inner peripheral surface of the outer circumferential face of described guide sleeve and the collar.At this moment, in strict situation, also tackle the joint of fixed block and the collar and take seal approach.
Therefore, further, also be provided with the 3rd Sealing at described fixed block and described cover interannular.Can form complete sealing configuration with second Sealing at collar inner peripheral surface and guide sleeve outer circumferential face place.
In above-mentioned arbitrary technological scheme, preferably, described the first Sealing and described the second Sealing are seal ring, and described the 3rd Sealing is sealing gasket.The shape of Sealing can have a variety of, and as preferential scheme, the first Sealing and the second Sealing because be sealing between the cylndrical surface, adopt the sealing structure of rings; The 3rd Sealing because be sealing between the plane, adopts the structure of sealing gasket.Then be easy to processing and installation.
In above-mentioned arbitrary technological scheme, preferably, described the first Sealing and described the second Sealing are sealing gasket.When the first Sealing is in end face between the collar and the guide sleeve, because be sealing between the plane, adopt the structure of sealing gasket, be easy to processing and install; For the sealing between the collar and the cylinder barrel, in the situation of not processing seal groove, also can adopt the structure of sealing gasket.
In above-mentioned arbitrary technological scheme, preferably, described the first Sealing and described the second Sealing are one-body molded.When the first Sealing and the second Sealing are sealing gasket, can one machine shaping, be convenient to install, and sealing effect is better.
To sum up, the above-mentioned interior clasp type hydraulic cylinder sealing structure that provides according to the utility model has following beneficial effect:
1) for the gap between guide sleeve and the collar, adopt the waterproof type of the first Sealing, for the gap between cylinder barrel and the collar, adopt the waterproof type of the second Sealing, for the gap between the collar and the fixed block, adopt the waterproof type of the 3rd Sealing, simple in structure, process easy for installationly, cost is low, and Applicable scope is extensive;
2) can prevent effectively that extraneous water from entering the gap between guide sleeve and the collar, cylinder barrel and the collar, the collar and the fixed block, prevents that extraneous water from entering the rod chamber of oil hydraulic cylinder, avoids hydraulic medium to be polluted;
3) make between interior snap ring, the collar and fixed block and be difficult for getting rusty, thereby make the guide sleeve convenient disassembly.
The utility model further provides a kind of oil hydraulic cylinder that comprises the described interior clasp type hydraulic cylinder sealing structure of above-mentioned arbitrary technological scheme, and apparent, this oil hydraulic cylinder has whole beneficial effects of above-mentioned interior clasp type hydraulic cylinder sealing structure.
The utility model further also provides a kind of concrete mixer that comprises above-mentioned oil hydraulic cylinder, and it has the identical technique effect of above-mentioned oil hydraulic cylinder, repeats no more.
Description of drawings
Fig. 1 is the sectional structure schematic representation of oil hydraulic cylinder waterproof sealing structure in the prior art;
Fig. 2 is the sectional structure schematic representation according to oil hydraulic cylinder waterproof sealing structure one embodiment described in the utility model;
Fig. 3 is the sectional structure schematic representation according to another embodiment of oil hydraulic cylinder waterproof sealing structure described in the utility model;
Fig. 4 is the sectional structure schematic representation according to the another embodiment of oil hydraulic cylinder waterproof sealing structure described in the utility model;
Fig. 5 is the A section enlarged diagram among Fig. 4;
Fig. 6 is according to an oil hydraulic cylinder waterproof sealing structure described in the utility model embodiment sectional structure schematic representation again
Fig. 7 is the sectional structure schematic representation according to oil hydraulic cylinder one embodiment described in the utility model;
Fig. 8 is the B section enlarged diagram among Fig. 7;
Fig. 9 is concrete mixer one embodiment's described in the utility model structural representation.
Among the figure, the corresponding relation among Fig. 1-Fig. 9 between each parts and reference character is as follows:
1 cylinder barrel, 2 guide sleeves, 3 interior snap ring 4 collars 5 fixed blocks
11 first Sealings, 12 second Sealings 13 the 3rd Sealing
14 the 4th Sealings, 6 cylinder caps, 7 pistons, 8 piston rods
Embodiment
Below in conjunction with description of drawings according to embodiment of the present utility model.
A lot of details have been set forth in the following description so that fully understand the utility model; but; the utility model can also adopt other to be different from other modes described here and implement, and therefore, protection domain of the present utility model is not subjected to the restriction of following public specific embodiment.
Fig. 2 is the sectional structure schematic representation according to oil hydraulic cylinder waterproof sealing structure one embodiment described in the utility model; Fig. 3 is the sectional structure schematic representation according to another embodiment of oil hydraulic cylinder waterproof sealing structure described in the utility model; Fig. 4 is the sectional structure schematic representation according to the another embodiment of oil hydraulic cylinder waterproof sealing structure described in the utility model; Fig. 5 is the A section enlarged diagram among Fig. 4; Fig. 6 is according to an oil hydraulic cylinder waterproof sealing structure described in the utility model embodiment sectional structure schematic representation again.
As shown in Figure 2, the utility model provides a kind of interior clasp type hydraulic cylinder sealing structure, comprises cylinder barrel 1, guide sleeve 2, interior snap ring 3, the collar 4 and fixed block 5, is provided with the first Sealing 11 at described guide sleeve 2 and 4 of the collars.
In the technique scheme, between guide sleeve 2 and the collar 4, be provided with the first Sealing 11, can prevent that extraneous water from infiltrating oil cylinder between guide sleeve 2 and the collar 4, thereby can prevent corrosion and to the pollution of hydraulic oil.
Preferably, also be provided with the second Sealing 12 at described cylinder barrel 1 and 4 of the described collars.The second Sealing 12 is set between cylinder barrel 1 and the collar 4, can further improves sealing effect.
Preferably, as shown in Figure 2, described the first Sealing 11 is arranged between the end face of the end face of described guide sleeve 2 and the collar 4.This mounting type for the first Sealing 11 need not to slot at structural member, and fitting operation is simple, can guarantee sealing effect, can prevent simultaneously that also sealing infiltrates from fixed block 5.
Certainly, as shown in Figure 3, described the first Sealing 11 setting can be between the inner peripheral surface of the outer circumferential face of described guide sleeve 2 and the collar 4.Specifically, can open seal groove at the outer circumferential face of guide sleeve 2, perhaps open seal groove at the inner peripheral surface of the collar 4, perhaps on the outer circumferential face of guide sleeve 2, open simultaneously seal groove with the inner peripheral surface of the collar 4, all can install the first Sealing 11.But, in the case in strict situation, also tackle fixed block 5 and take seal approach with the joint of the collar 4.
Therefore, further, as shown in Figure 4 and Figure 5, also be provided with the 3rd Sealing 13 at described fixed block 5 and 4 of the described collars.Can form complete sealing configuration with second Sealing 12 at the collar 4 inner peripheral surfaces and guide sleeve 2 outer circumferential face places.At this moment, the 3rd Sealing 13 can directly be pressed between fixed block 5 and the collar 4.
Preferably, as shown in Figure 4, described the first Sealing 11 and described the second Sealing 12 are seal ring, and described the 3rd Sealing 13 is sealing gasket.The shape of Sealing can have a variety of, and as preferential scheme, the first Sealing 11 and the second Sealing 12 because be sealing between the cylndrical surface, adopt the sealing structure of rings; The 3rd Sealing 13 because be sealing between the plane, adopts the structure of sealing gasket, then is easy to processing and installs.
Preferably, as shown in Figure 6, described the first Sealing 11 and described the second Sealing 12 are sealing gasket.When the first Sealing 11 is in end face between the collar 4 and the guide sleeve 2, because be sealing between the plane, adopt the structure of sealing gasket, be easy to processing and install; For the sealing between the collar 4 and the cylinder barrel 1, in the situation of not processing seal groove, also can adopt the structure of sealing gasket.
Further, as shown in Figure 6, described the first Sealing 11 and described the second Sealing 12 are one-body molded.When the first Sealing 11 and the second Sealing 12 are sealing gasket, can one machine shaping, be convenient to install, and sealing effect is better.
As for the material of the first Sealing 11, the second Sealing 12 and the 3rd Sealing 13, can be oil resistant rubber close also can be that polyurethane is close.Certainly, can be the sealing gasket of other materials also, as long as have oil resistant, be not subjected to the hydraulic medium corrosion and have elasticity.This is that those skilled in the art can understand.
To sum up, the above-mentioned interior clasp type hydraulic cylinder sealing structure that provides according to the utility model has following beneficial effect: for the gap between guide sleeve 2 and the collar 4, adopt the waterproof type of the first Sealing 11, for the gap between cylinder barrel 1 and the collar 4, adopt the waterproof type of the second Sealing 12, for the gap between the collar 4 and the fixed block 5, adopt the waterproof type of the 3rd Sealing 13, simple in structure, process easy for installation, cost is low, and Applicable scope is extensive; Can prevent effectively that extraneous water from entering the gap between guide sleeve 2 and the collar 4, cylinder barrel 1 and the collar 4, the collar 4 and the fixed block 5, prevents that extraneous water from entering the rod chamber of oil hydraulic cylinder, avoids hydraulic medium to be polluted; Make interior snap ring 3, the collar 4 and 5 of fixed blocks be difficult for getting rusty, thereby make the guide sleeve convenient disassembly.
The utility model further provides a kind of oil hydraulic cylinder that comprises the described interior clasp type hydraulic cylinder sealing structure of above-mentioned arbitrary technological scheme, and apparent, this oil hydraulic cylinder has whole beneficial effects of above-mentioned interior clasp type hydraulic cylinder sealing structure.
The utility model again one the step a kind of concrete mixer that comprises above-mentioned oil hydraulic cylinder also is provided, it has the identical technique effect of above-mentioned oil hydraulic cylinder, repeats no more.
Interior clasp type hydraulic cylinder sealing structure described in the utility model, oil hydraulic cylinder and concrete mixer, can carry out implementation in the following way:
Embodiment one:
As shown in Figure 2, a kind of interior clasp type hydraulic cylinder sealing structure comprises cylinder barrel 1, guide sleeve 2, interior snap ring 3, the collar 4 and fixed block 5, is provided with the first Sealing 11 at guide sleeve 2 and 4 of the collars, is provided with the second Sealing 12 between the collar 4 and cylinder barrel 1.In the present embodiment, the first Sealing 11 is arranged between the end face of the end face of the collar 4 and guide sleeve 2, and adopts the structure of sealing gasket, directly is squeezed between the collar 4 and the guide sleeve 2; The second Sealing 12 is the sealing structure of rings, at the outer circumferential face of the collar 4 seal groove is set, and the second Sealing 12 is fixed in the sealing groove.Certainly, also can open seal groove at the inner peripheral surface of cylinder barrel 1, perhaps all slotting on the inner peripheral surface of cylinder barrel 1 and on the outer circumferential face of the collar 4, the second Sealing 12 is installed, all be fine.
In the present embodiment, for the gap between cylinder barrel 1 and the collar 4, adopt the waterproof type of the second Sealing 12, simple in structure in 4 modes that adopt the first Sealing 11 of guide sleeve 2 and the collar, to process easy for installationly, cost is low, and Applicable scope is extensive; Can prevent effectively that extraneous water from entering the gap between interior snap ring, the collar, cylinder barrel, the guide sleeve, prevents that extraneous water from entering the rod chamber of oil hydraulic cylinder, avoids hydraulic medium to be polluted; Make interior snap ring, the collar and fixed block be difficult for getting rusty, thereby make the guide sleeve convenient disassembly.
Embodiment two:
As shown in Figure 3, the first Sealing 11 is arranged between the inner peripheral surface of the outer circumferential face of guide sleeve 2 and the collar 4, can plays equally the effect of waterproof, sealing, realize goal of the invention of the present utility model.In the present embodiment, the first Sealing 11 is the sealing structure of rings, and be installed in the seal groove of the collar 4 inner peripheral surfaces, can certainly be installed in the seal groove on the outer circumferential face of guide sleeve 2, also can slotting simultaneously on the inner peripheral surface of the collar 4 and on the outer circumferential face of guide ring 2, the first Sealing 11 be installed.The second Sealing 12 also is the sealing structure of rings, and is installed in the seal groove on cylinder barrel 1 inner peripheral surface, and same, the second Sealing 12 can be installed on the outer circumferential face of the collar 4 equally, perhaps fluting simultaneously on the collar 4 and cylinder barrel 1.Other structures are identical with above-described embodiment 1, repeat no more.
Embodiment three:
As shown in Figure 4 and Figure 5, on the basis of above-described embodiment two, also be provided with the 3rd Sealing 13 at described fixed block 5 and 4 of the described collars.In the present embodiment, the 3rd Sealing 13 is gasket structure, directly adopts fixed block 5 to be pressed on the attachment face between fixed block 5 and the collar 4.Be that sealing to the second embodiment replenishes, sealing effect can be realized goal of the invention of the present utility model better, more comprehensively equally.Other structures are identical with embodiment two, repeat no more.
Embodiment four
As shown in Figure 6, in the present embodiment, described the first Sealing 11 and described the second Sealing 12 are gasket structure, and one-body molded.Namely for the sealing between the collar 4 and the cylinder barrel 1, in the situation of not processing seal groove, directly can adopt the structure of sealing gasket.The sealing gasket of present embodiment adopts this kind structure, be easy to processing and installation, and sealing effect is better, can realize goal of the invention of the present utility model equally.Other structures are identical with embodiment one, repeat no more.
Embodiment five
Fig. 7 and Fig. 8 show the structure according to oil hydraulic cylinder one embodiment described in the utility model.Wherein, Fig. 7 is the sectional structure schematic representation according to oil hydraulic cylinder one embodiment described in the utility model; Fig. 8 is the B section enlarged diagram among Fig. 7.
As shown in Figure 7 and Figure 8, described oil hydraulic cylinder comprises cylinder cap 6, piston 7, piston rod 8, cylinder barrel 1, guide sleeve 2, is provided with the first Sealing 11 between the end face of the end face of the collar 4 and guide sleeve 2, is provided with the second Sealing 12 between the collar 4 outer wall and cylinder barrel 1 internal face.In the present embodiment, the first Sealing 11 is the structure of sealing gasket, and the second Sealing 12 is the sealing structure of rings, and is installed in the seal groove on the collar outer circumferential face.
This embodiment's oil hydraulic cylinder for the gap between guide sleeve and the collar, adopts the waterproof type of the first Sealing, for the gap between snap ring cylinder barrel and the collar, adopt the waterproof type of the second Sealing, can prevent that extraneous water from entering the rod chamber of oil hydraulic cylinder, avoids hydraulic medium to be polluted, and simple in structure, process easy for installationly, cost is low, and Applicable scope is extensive, and can effectively prevent getting rusty between interior snap ring, the collar and fixed block, thereby make the guide sleeve convenient disassembly.
More than the installation form of the first Sealing 11 and the second Sealing 12, can adopt equally the described mode of above-mentioned interior each embodiment of clasp type hydraulic cylinder sealing structure, have equally above-mentioned effect.
The oil hydraulic cylinder of this structure, waterproof sealing structure is simple, processes easy for installationly, and cost is low; Can prevent effectively that extraneous water from entering the gap between interior snap ring, the collar, cylinder barrel, the guide sleeve, prevent that extraneous water from entering the oil hydraulic cylinder rod chamber, avoids hydraulic medium to be polluted; Interior snap ring, the collar and fixed block are difficult for getting rusty, the guide sleeve convenient disassembly.
In addition, also the second Sealing can be arranged between cover ring inner surface and the guide sleeve outer cylinder, between the collar and fixed block, be provided with the 3rd Sealing simultaneously, can make equally described oil hydraulic cylinder have whole beneficial effects of the described oil hydraulic cylinder of above-described embodiment.
Embodiment six
Fig. 9 shows the structure according to concrete mixer one embodiment described in the utility model.
As shown in Figure 9, the utility model also provides a kind of concrete mixer that comprises the described oil hydraulic cylinder of above-described embodiment, employed oil hydraulic cylinder on this concrete mixer, because having above-mentioned sealing configuration, can prevent effectively that extraneous water from entering the gap between interior snap ring, the collar, cylinder barrel, the guide sleeve, prevent that extraneous water from entering the oil hydraulic cylinder rod chamber, avoids hydraulic medium to be polluted; Can prevent getting rusty of interior snap ring, the collar and fixed block, guide sleeve convenient disassembly waterproof sealing structure is simple; And process easy for installationly, cost is low.
In the utility model, term " first ", " second " only are used for describing purpose, and can not be interpreted as indication or hint relative importance.Term " a plurality of " refers to two or more, unless clear and definite restriction is arranged in addition.
In the utility model, unless clear and definite regulation and restriction are arranged in addition, broad understanding should be done in the terms such as term " installation ", " linking to each other ", " connection ", " fixing ", for example, can be to be fixedly connected with, and also can be to removably connect, or connect integratedly; Can be directly to link to each other, also can indirectly link to each other by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term in the utility model.
The above is preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1. clasp type hydraulic cylinder sealing structure in a kind comprises cylinder barrel (1), guide sleeve (2), interior snap ring (3), the collar (4) and fixed block (5), it is characterized in that, is provided with the first Sealing (11) between described guide sleeve (2) and the collar (4).
2. interior clasp type hydraulic cylinder sealing structure according to claim 1 is characterized in that, also is provided with the second Sealing (12) between described cylinder barrel (1) and the described collar (4).
3. interior clasp type hydraulic cylinder sealing structure according to claim 2 is characterized in that, described the first Sealing (11) is arranged between the end face of the end face of described guide sleeve (2) and the collar (4).
4. interior clasp type hydraulic cylinder sealing structure according to claim 2 is characterized in that, described the first Sealing (11) is arranged between the inner peripheral surface of the outer circumferential face of described guide sleeve (2) and the collar (4).
5. interior clasp type hydraulic cylinder sealing structure according to claim 4 is characterized in that, also is provided with the 3rd Sealing (13) between described fixed block (5) and the described collar (4).
6. interior clasp type hydraulic cylinder sealing structure according to claim 5 is characterized in that, described the first Sealing (11) and described the second Sealing (12) are seal ring, and described the 3rd Sealing (13) is sealing gasket.
7. interior clasp type hydraulic cylinder sealing structure according to claim 3 is characterized in that, described the first Sealing (11) is seal ring, and described the second Sealing (12) is sealing gasket.
8. interior clasp type hydraulic cylinder sealing structure according to claim 7 is characterized in that, described the first Sealing (11) and described the second Sealing (12) can be made of one moulding.
9. an oil hydraulic cylinder is characterized in that, comprises such as each described interior clasp type hydraulic cylinder sealing structure in the claim 1 to 8.
10. a concrete mixer is characterized in that, comprises oil hydraulic cylinder as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220342249 CN202708063U (en) | 2012-02-15 | 2012-07-16 | Inner snap ring type hydraulic cylinder sealing structure, hydraulic cylinder and concrete pump truck |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220049306 | 2012-02-15 | ||
| CN201220049306.2 | 2012-02-15 | ||
| CN 201220342249 CN202708063U (en) | 2012-02-15 | 2012-07-16 | Inner snap ring type hydraulic cylinder sealing structure, hydraulic cylinder and concrete pump truck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202708063U true CN202708063U (en) | 2013-01-30 |
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ID=47588369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220342249 Expired - Lifetime CN202708063U (en) | 2012-02-15 | 2012-07-16 | Inner snap ring type hydraulic cylinder sealing structure, hydraulic cylinder and concrete pump truck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202708063U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454757A (en) * | 2014-11-12 | 2015-03-25 | 三一重型装备有限公司 | Hydraulic cylinder and cylinder cover structure thereof |
-
2012
- 2012-07-16 CN CN 201220342249 patent/CN202708063U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454757A (en) * | 2014-11-12 | 2015-03-25 | 三一重型装备有限公司 | Hydraulic cylinder and cylinder cover structure thereof |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SANY AUTOMOBILE MANUFACTURING CO., LTD. Free format text: FORMER OWNER: SANYI HEAVY INDUSTRY CO LTD Effective date: 20130506 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130506 Address after: 410100 Changsha economic and Technological Development Zone, Hunan City, the 31 industrial city Patentee after: Sany Automobile Manufacturing Co.,Ltd. Address before: 410100 Changsha economic and Technological Development Zone, Hunan City, the 31 industrial city Patentee before: SANY HEAVY INDUSTRY Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130130 |