CN201461589U - Oil cylinder for lifting machine - Google Patents
Oil cylinder for lifting machine Download PDFInfo
- Publication number
- CN201461589U CN201461589U CN2009200757020U CN200920075702U CN201461589U CN 201461589 U CN201461589 U CN 201461589U CN 2009200757020 U CN2009200757020 U CN 2009200757020U CN 200920075702 U CN200920075702 U CN 200920075702U CN 201461589 U CN201461589 U CN 201461589U
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- CN
- China
- Prior art keywords
- connecting head
- head
- oil cylinder
- lifting machine
- piston head
- Prior art date
- 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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Abstract
The utility model discloses an oil cylinder for a lifting machine, which comprises a steel drum, a piston rod and a piston head arranged in the steel drum and a combined seal ring, wherein a connector extends out of one end of the piston rod positioned in the steel drum, a concave part is arranged on one side of the piston head, and a circle of grooves are formed along the outer circle of the piston head, a connector is accommodated in the concave part and fixedly connected with the concave part, and the combined seal ring is arranged in the groove and clung to the inner wall of the steel drum. The utility model is directly and fixedly connected with the connector of the piston rod through the piston head with a closed end, thereby reducing the quantity of O-shaped seal rings for sealing the clearance of the piston head and the connector, only requiring the combined seal ring between the piston head and the inner wall of the steel drum, avoiding the oil leakage phenomenon caused by the errors during the processing or assembly process of the O-shaped seal rings, and improving the whole sealing performance of the oil cylinder for the lifting machine.
Description
Technical field
The utility model relates to the vehicle detection technical field, relates in particular to a kind of vehicle detection lifting machine oil cylinder.
Background technique
The lifting machine is a kind of mechanical device that is used for vehicle maintenance, and wherein, oil cylinder is the vitals of lifting machine, and it is controlled by power unit, and transmission hydraulic pressure is realized the rising or the decline of vehicle.Oil cylinder inside should have excellent sealability, thereby avoids the vehicle that causes because of leakage of oil or operator's personal safety problem.
Fig. 1 is existing lifting machine cylinder seal structural representation, piston rod 12 is located in the steel drum 11, one end of piston rod 12 has connecting head 13, piston head 14 is the nut shape, and cutting ferrule is in the outside of connecting head 13, piston head 14 seals by a combined seal ring 15 with the gap of steel drum 11 inwalls, and the connecting head 13 of piston rod 12 then seals 16 by an O RunddichtringO with the gap of piston head 14.
As seen, the sealing effect of whole cylinder must realize that any one breaks down by combined seal ring and two seal arrangements of O RunddichtringO, all will cause leakage of oil.Especially O RunddichtringO, because it is comparatively tiny, can there be some errors unavoidably in the course of working, also may there be design error in when assembling and connecting head, even combined seal ring is intact so, also can oil leakage phenomenon occur, vehicle and operator's safety is threatened at O RunddichtringO place.
The model utility content
The purpose of this utility model provides a kind of lifting machine oil cylinder of sealability excellence, in order to solve the not good technical problem of sealing effect that above-mentioned existing oil cylinder exists.
For achieving the above object, the utility model provides a kind of lifting machine oil cylinder, comprise steel drum, be located at piston rod and piston head and combined seal ring in the steel drum, the end that described piston rod is positioned at steel drum is extended with connecting head, one side of described piston head is provided with a recess and the outer ring is provided with a circle groove, described recess holds connecting head and fixedly connected with it, and described combined seal ring is located in the groove and with inner walls of steel drums and is close to.
Further, described recess is fixedlyed connected with the connecting head screw thread.
Further, the side of described connecting head has a hole, and a hole is also offered in the position in hole on corresponding connecting head, the side of described piston head, and the insertion screw is fixedlyed connected with connecting head.
Further, the side of described connecting head has at least one plane, and described recess shape and connecting head are complementary, and a hole is offered in the position on the described one or more planes of correspondence in the side of described piston head, and the insertion screw is fixedlyed connected with connecting head.
Further, one or more holes are also offered in the position in hole on corresponding piston head, the side of described connecting head, and insert described screw.
Further, the side of described connecting head is a hexagon, and described recess is the interior hexagon that is complementary with connecting head, and a hole is offered in the side of described piston head in hexagonal one or more the position of correspondence, and the insertion screw is fixedlyed connected with connecting head.
Further, one or more holes are also offered in the position in hole on corresponding piston head, the side of described connecting head, and insert described screw.
Further, a side of the close piston rod of groove is located in the hole on described connecting head and the piston head.
The utility model adopts the piston head of end sealing, directly fixedly connected with the connecting head of piston rod, can reduce the O RunddichtringO of packed-piston head and connecting head gap in the prior art, only use the combined seal ring between piston head and the inner walls of steel drums, avoid the oil leakage phenomenon that causes because of the error in O RunddichtringO processing or the assembling, improve the overall sealing performance of lifting machine with oil cylinder.
Description of drawings
For clearlyer understanding the purpose of this utility model, characteristics and advantage, below with reference to accompanying drawing preferred embodiment of the present utility model is described in detail, wherein:
Fig. 1 is existing lifting machine cylinder seal structural representation; And
Fig. 2 is the sectional view of lifting machine of the present utility model with oil cylinder.
Embodiment
See also Fig. 2, in the present embodiment, oil cylinder 2 comprises steel drum 21, be located at piston rod 22 and piston head 24 in the steel drum 21, and combined seal ring 25, the end that piston rod 22 is positioned at steel drum 21 is extended with connecting head 23, one side of piston head 24 is provided with recess 241, and its outer ring is provided with a circle groove 242, the side of connecting head 23 is a hexagon, recess 241 is for the interior hexagon that is complementary with connecting head 23 and can hold connecting head 23, a hole is offered in the position of corresponding connecting head 23 hexagonal faces in the side of piston head 24, this face of connecting head 23 is also offered a hole, be threaded in the hole of screw 26 insertion piston heads 24 and connecting head 23 and with the hole, and piston head 24 is fixed on the connecting head 23 of piston rod 22.Wherein, the hole of above-mentioned piston head 24 and connecting head 23 is opened in a side of the close piston rod 22 of groove 242, like this, after in combined seal ring 25 is arranged on groove 242 and with steel drum 21 inwalls, being close to, just can play the effect of sealing fluid, fluid just can not leak to piston rod 22, and in the hole of piston head 24 and connecting head 23, therefore, just do not need extra seal arrangement, as O RunddichtringO of the prior art, come the gap between packed-piston head 24 and the connecting head 23, reduced may leakage of oil the slit, say from another point of view, just improved whole sealing effect.
Further, the Placement of piston head and connecting head is not limited only to the foregoing description, and piston head can be fixedlyed connected with the connecting head screw thread by its recess; Can be directly on the connecting head of circular or other shapes and piston head corresponding position, offer the hole, and it is fixedly connected to insert screw; Also one or more planes can be set in the side of connecting head, the recess shape of piston head is complementary with it, in the side of piston head the hole is offered in position that should one or more planes, inserting screw is fastened on the plane surface of connecting head, because connecting head can't rotate, can prevent that piston head from coming off so screw is fixing, certainly in recess, also can on corresponding piston head on the plane of connecting head side, also offer the hole in the position in hole, make its connection can be more firm.
Similarly, the hole also can not offered in the side of hexagon connecting head in the foregoing description, and is directly passed the hole of piston head by screw, is fastened on the hexagonal plane.
In sum, the utility model adopts the piston head of end sealing, directly fixedly connected with the connecting head of piston rod, can reduce the O RunddichtringO of packed-piston head and connecting head gap in the prior art, only use the combined seal ring between piston head and the inner walls of steel drums, avoid the oil leakage phenomenon that causes because of the error in O RunddichtringO processing or the assembling, improve the overall sealing performance of lifting machine with oil cylinder.
Claims (8)
1. lifting machine oil cylinder, it is characterized in that: comprise steel drum, be located at piston rod and piston head and combined seal ring in the steel drum, the end that described piston rod is positioned at steel drum is extended with connecting head, one side of described piston head is provided with a recess and the outer ring is provided with a circle groove, described recess holds connecting head and fixedly connected with it, and described combined seal ring is located in the groove and with inner walls of steel drums and is close to.
2. lifting machine oil cylinder according to claim 1 is characterized in that: described recess is fixedlyed connected with the connecting head screw thread.
3. lifting machine oil cylinder according to claim 1, it is characterized in that: the side of described connecting head has a hole, and a hole is also offered in the position in hole on corresponding connecting head, the side of described piston head, and the insertion screw is fixedlyed connected with connecting head.
4. lifting machine oil cylinder according to claim 1, it is characterized in that: the side of described connecting head has at least one plane, described recess shape and connecting head are complementary, a hole is offered in the position on the described one or more planes of correspondence in the side of described piston head, and the insertion screw is fixedlyed connected with connecting head.
5. lifting machine oil cylinder according to claim 4 is characterized in that: one or more holes are also offered in the position in hole on corresponding piston head, the side of described connecting head, and insert described screw.
6. lifting machine oil cylinder according to claim 1, it is characterized in that: the side of described connecting head is a hexagon, described recess is the interior hexagon that is complementary with connecting head, a hole is offered in hexagonal one or more the position of correspondence in the side of described piston head, and the insertion screw is fixedlyed connected with connecting head.
7. lifting machine oil cylinder according to claim 6 is characterized in that: one or more holes are also offered in the position in hole on corresponding piston head, the side of described connecting head, and insert described screw.
8. according to each described lifting machine oil cylinder of claim 3 to 7, it is characterized in that: a side of the close piston rod of groove is located in the hole on described connecting head and the piston head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200757020U CN201461589U (en) | 2009-07-31 | 2009-07-31 | Oil cylinder for lifting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200757020U CN201461589U (en) | 2009-07-31 | 2009-07-31 | Oil cylinder for lifting machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201461589U true CN201461589U (en) | 2010-05-12 |
Family
ID=42388942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200757020U Expired - Fee Related CN201461589U (en) | 2009-07-31 | 2009-07-31 | Oil cylinder for lifting machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201461589U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013095693A1 (en) | 2011-04-21 | 2013-06-27 | Actuant Corporation | Synchronized lifting apparatus |
-
2009
- 2009-07-31 CN CN2009200757020U patent/CN201461589U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013095693A1 (en) | 2011-04-21 | 2013-06-27 | Actuant Corporation | Synchronized lifting apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100512 Termination date: 20130731 |