CN216734221U - Self-lubricating landing leg - Google Patents
Self-lubricating landing leg Download PDFInfo
- Publication number
- CN216734221U CN216734221U CN202122844637.7U CN202122844637U CN216734221U CN 216734221 U CN216734221 U CN 216734221U CN 202122844637 U CN202122844637 U CN 202122844637U CN 216734221 U CN216734221 U CN 216734221U
- Authority
- CN
- China
- Prior art keywords
- leg
- oil cylinder
- screw rod
- lubricating
- nut
- 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.)
- Active
Links
- 239000004519 grease Substances 0.000 claims abstract description 14
- 230000001050 lubricating effect Effects 0.000 claims abstract description 11
- 230000000149 penetrating effect Effects 0.000 claims abstract description 6
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000005299 abrasion Methods 0.000 abstract description 6
- 238000005461 lubrication Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000033001 locomotion Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Images
Landscapes
- Pivots And Pivotal Connections (AREA)
Abstract
A self-lubricating supporting leg comprises an outer supporting leg, an inner supporting leg, a screw rod and a nut, wherein the outer supporting leg is movably sleeved outside the inner supporting leg, the nut is installed at the top of the inner supporting leg, the screw rod is connected to the nut in a penetrating mode and is in threaded fit with the nut, the upper end of the screw rod penetrates through the nut and is in pivot fit with the outer supporting leg, and the lower end of the screw rod penetrates through the nut and extends into the inner supporting leg; an oil cylinder filled with lubricating grease is arranged in the inner supporting leg, the top of the oil cylinder is provided with an opening, the bottom of the oil cylinder is a blind end, and the oil cylinder is sleeved outside the screw rod and is fixedly matched with the inner supporting leg. The utility model realizes the self-lubrication of the supporting leg, reduces the abrasion of the screw rod and the nut and prolongs the maintenance period of the supporting leg.
Description
Technical Field
The utility model relates to the technical field of vehicles, in particular to a self-lubricating support leg.
Background
The landing leg is used for supporting the semitrailer, and when the semitrailer is separated from the tractor, necessary support is provided for the semitrailer through the landing leg. The landing leg generally includes interior landing leg, outer landing leg, lead screw and nut, and the outside of landing leg including outer landing leg cover is established, and the length direction activity of outer landing leg can be followed to the inner supporting leg, and the top of landing leg including the nut is fixed, and the lead screw is installed in outer landing leg to pass the nut, utilize drive mechanism in the outer landing leg to drive the lead screw and rotate, utilize the nut to drive the motion of inner landing leg then, realize the flexible of landing leg.
In order to ensure smooth relative movement between the screw rod and the nut, the gap between the screw rod and the nut needs to be lubricated, the lubricating grease is influenced by gravity, falls down after lubricating the screw rod and the nut, and cannot continuously lubricate the screw rod and the nut, so that the gap between the screw rod and the nut is lack of the lubricating grease, the abrasion of the screw rod and the nut is aggravated, and the lubricating grease needs to be frequently filled to reduce the abrasion,
SUMMERY OF THE UTILITY MODEL
In view of the defects of the prior art, the utility model aims to provide a self-lubricating support leg which can realize self-lubrication of the support leg, reduce the abrasion of a screw rod and a nut and prolong the maintenance period.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a self-lubricating supporting leg comprises an outer supporting leg, an inner supporting leg, a screw rod and a nut, wherein the outer supporting leg is movably sleeved outside the inner supporting leg; an oil cylinder filled with lubricating grease is arranged in the inner supporting leg, an opening is formed in the top of the oil cylinder, a blind end is formed in the bottom of the oil cylinder, and the oil cylinder is sleeved outside the screw rod and is fixedly matched with the inner supporting leg.
The bottom end of the nut is embedded in the opening of the oil cylinder.
The nut includes and fixed part and connecting portion, and the fixed part is connected with the inner leg, and connecting portion extend downwards by the bottom of fixed part.
The connecting part is in a cone shape with the outer diameter gradually reduced from top to bottom.
The top edge of the fixed part is provided with an extension part arranged above the top end face of the inner support leg, two sides of the fixed part are respectively connected with a fixing pin extending along the radial direction of the nut in a penetrating manner, and the two fixing pins are respectively arranged on two opposite side walls of the inner support leg in a penetrating manner.
The bottom of the oil cylinder is propped against the bottom end face of the inner supporting leg.
An anti-collision plate is arranged around the outer part of the oil cylinder, and the inner edge of the anti-collision plate is fixedly connected to the outer surface of the oil cylinder, and a first gap is formed between the outer edge and the inner surface of the inner supporting leg.
A limiting ring is sleeved at the bottom end of the screw rod, and a second gap is formed between the limiting ring and the inner surface of the oil cylinder.
The inner part of the outer supporting leg is connected with a fixing plate positioned above the inner supporting leg, the top end part of the screw rod penetrates through the fixing plate from bottom to top, a limiting pin extending along the radial direction of the screw rod is connected to the screw rod in a penetrating mode, and two sides of the limiting pin penetrate through the screw rod and are pressed on the upper surface of the fixing plate.
The outer sleeve of lead screw is equipped with a backup pad that is located between fixed plate and the nut, is provided with a step face on the lead screw, and the lower surface of backup pad is pressed on the step face, is provided with a thrust bearing between backup pad and the fixed plate.
The screw rod is arranged in the oil cylinder, the lubricating grease in the oil cylinder can continuously comprise the screw rod, and when the screw rod rotates, the grease can enter a gap between the screw rod and the nut along with the external threads of the screw rod, so that the matching part of the screw rod and the nut is continuously lubricated, and the redundant grease falls into the oil cylinder and can be recycled, thereby realizing the self-lubrication of the supporting leg, reducing the abrasion of the screw rod and the nut, and prolonging the maintenance period of the supporting leg.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view taken at A in FIG. 1;
fig. 3 is a schematic view of the installation of the present invention.
Detailed Description
The utility model will be further described with reference to the accompanying drawings and specific embodiments:
as shown in fig. 1, 2 and 3, the self-lubricating leg according to the present invention comprises an outer leg 10, an inner leg 20, a screw rod 40 and a nut 30, wherein the outer leg 10 and the inner leg 20 are made of square pipes with different sizes, wherein the outer leg 10 is movably sleeved outside the inner leg 20, thereby making the two constitute a telescopic mechanism, the nut 30 and the screw rod 40 cooperate to drive the inner leg 20 and the outer leg 10 to extend and retract, specifically, the nut 30 is installed on the top of the inner leg 20, the extension direction of the screw rod 40 is consistent with the extension direction of the inner leg 20 and the outer leg 10, the screw rod 40 is connected to the nut 30 and is in threaded fit with the nut 30, the upper end of the screw rod 40 is in pivot fit with the outer leg 10 after passing through the nut 30, the driving force can be transmitted to the screw rod 40 through a transmission mechanism arranged inside the outer leg 10, so that the screw rod 40 rotates relative to the nut 30, then the inner supporting leg 20 and the outer supporting leg 10 are driven to stretch, the lower end part of the screw rod 40 passes through the nut 30 and then extends downwards to the inner supporting leg 20, an oil cylinder 50 is further arranged inside the inner supporting leg 20, the top of the oil cylinder 50 is an opening, the bottom of the oil cylinder 50 is a blind end, the part of the screw rod 40 passing through the nut 30 penetrates into the oil cylinder 50 from the opening at the top of the oil cylinder 50, the oil cylinder 50 is covered outside the screw rod 40, lubricating grease is filled inside the oil cylinder 50, the oil cylinder 50 is fixedly matched with the inner supporting leg 20, and in a word, the oil cylinder 50 can move synchronously along with the inner supporting leg 20.
When the support leg works, the screw rod 40 is entirely arranged in the oil cylinder 50, lubricating grease in the oil cylinder 50 can continuously comprise the screw rod 40, and when the screw rod 40 rotates, the grease can enter a gap between the screw rod 40 and the nut 30 along with threads outside the screw rod 40, so that the matching part of the screw rod 40 and the nut 30 is continuously lubricated, and redundant grease falls into the oil cylinder and can be recycled, so that the self-lubrication of the support leg is realized, the abrasion of the screw rod and the nut is reduced, and the maintenance period of the support leg is prolonged.
In the preferred embodiment of the present invention, the bottom end of the nut 30 may be embedded in the opening at the top of the oil cylinder 50, and the opening at the top of the oil cylinder 50 is closed by the nut 30, so as to prevent the lubricating grease from leaking out of the top of the oil cylinder 50; in addition, the nut 30 includes a fixing portion 31 and a connecting portion 32, the fixing portion 31 is connected to the inner leg 20, the connecting portion 32 is located below the fixing portion 31 and is formed by extending the bottom of the fixing portion 31 downward, the connecting portion 32 is substantially square so as to be suitable for matching with the inner leg 20, the connecting portion 32 is tapered, and the outer diameter thereof gradually decreases from top to bottom, so that when the oil cylinder 50 is assembled with the nut 30, the connecting portion 32 is inserted into the opening at the top of the oil cylinder 50 from top to bottom, and the tapered connecting portion 32 is matched with the opening of the oil cylinder 50 to gradually press the nut 30 and the oil cylinder 50, so that the oil cylinder 50 and the connecting portion 32 can be matched more and more tightly, and more importantly, the tapered connecting portion 32 can center the oil cylinder 50 during assembly, so that the oil cylinder 50 and the lead screw 40 have higher coaxiality.
The edge of the fixing portion 31 is provided with an extending portion 33 extending outward, the extending portion 33 is disposed above the top end surface 201 of the inner leg 20, two sides of the fixing portion 31 are respectively provided with a fixing pin 34, an inner side end of the fixing pin 34 is inserted into a hole formed in the fixing portion 31, an outer side end of the fixing pin is inserted into a hole 21 formed in a side wall of the inner leg 20, and thus, two sides of the fixing portion 31 are respectively connected with two side walls of the inner leg 20 by the two fixing pins 34. The bottom end of the oil cylinder 50 abuts against the bottom end surface of the inner leg 20, the bottom of the oil cylinder 50 is pressed upward by the bottom of the inner leg 20, and the top is pressed downward by the nut 30, thereby mounting the oil cylinder 50 in the inner leg 20.
In other embodiments, the oil cylinder 50 of the present invention is provided with an anti-collision plate 51 around the outside thereof, the inner edge of the anti-collision plate 51 is fixedly connected to the outer surface of the oil cylinder 50, a first gap is formed between the outer edge of the anti-collision plate 51 and the inner surface of the inner leg 20, when the leg is in operation, the inner leg 20 and the outer leg 10 are extended and contracted by the rotation of the screw rod 40, the screw rod 40 may have a certain swing condition, and the oil cylinder 50 may also swing with a smaller amplitude, and by providing the anti-collision plate 51, when the oil cylinder 50 swings, the outer edge of the anti-collision plate 51 contacts with the inner surface of the inner leg 20, thereby preventing the oil cylinder 50 from directly colliding with the inner surface of the inner leg 20.
The bottom end of the screw rod 40 is further sleeved with a limiting ring 44, a second gap is formed between the limiting ring 44 and the inner surface of the oil cylinder 50, when the oil cylinder 50 deflects, the limiting ring 44 contacts with the inner surface of the oil cylinder 50, so that the external threads of the screw rod 40 are prevented from contacting with the oil cylinder 50, and the oil cylinder 50 is protected.
In the utility model, the fixing plate 11 positioned above the inner leg 20 is fixedly connected inside the outer leg 10, the top of the screw rod 40 penetrates through the fixing plate 11 from bottom to top, the screw rod 40 is connected with a limiting pin 41 extending along the radial direction of the screw rod 40 in a penetrating manner, and two ends of the limiting pin 41 respectively penetrate through two sides of the screw rod 40 and are pressed on the upper surface of the fixing plate 11, so that the screw rod 40 is prevented from moving downwards relative to the fixing plate 11 through the limiting pin 41, and the screw rod 40 is ensured to be capable of being matched with the fixing plate 11 in a pivoting manner. The outer portion of the screw 40 is sleeved with a supporting plate 42 between the fixing plate 11 and the nut 30, a step surface 401 is provided on the screw 40, a lower surface of the supporting plate 42 is pressed on the step surface 401, and a thrust bearing 43 is provided between the supporting plate 42 and the fixing plate 11, so that the screw 40 can flexibly rotate relative to the outer leg 10.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (10)
1. A self-lubricating supporting leg is characterized by comprising an outer supporting leg, an inner supporting leg, a screw rod and a nut, wherein the outer supporting leg is movably sleeved outside the inner supporting leg; an oil cylinder filled with lubricating grease is arranged in the inner supporting leg, an opening is formed in the top of the oil cylinder, a blind end is formed in the bottom of the oil cylinder, and the oil cylinder is sleeved outside the screw rod and is fixedly matched with the inner supporting leg.
2. The self-lubricating leg of claim 1, wherein the bottom end of the nut is nested within the opening of the oil cylinder.
3. The self-lubricating leg of claim 2, wherein the nut includes a retainer portion connected to the inner leg and a connecting portion extending downwardly from a bottom of the retainer portion.
4. The self-lubricating leg as set forth in claim 3 wherein the connecting portion is tapered with an outer diameter decreasing from top to bottom.
5. The self-lubricating leg as claimed in claim 3, wherein the top edge of the fixing portion is provided with an extension portion disposed above the top end surface of the inner leg, and two fixing pins extending in the radial direction of the nut are respectively penetrated through two sides of the fixing portion and are respectively penetrated through two opposite side walls of the inner leg.
6. The self-lubricating leg of claim 5, wherein the bottom of the oil cylinder abuts the bottom end face of the inner leg.
7. The self-lubricating leg of claim 1, wherein the outer portion of the oil cylinder is circumferentially provided with an anti-collision plate, and the inner edge of the anti-collision plate is fixedly connected to the outer surface of the oil cylinder, and a first gap is formed between the outer edge and the inner surface of the inner leg.
8. The self-lubricating leg of claim 1, wherein the bottom end of the lead screw is sleeved with a stop collar, and a second gap is formed between the stop collar and the inner surface of the oil cylinder.
9. The self-lubricating leg according to claim 1, wherein the outer leg is internally connected with a fixing plate positioned above the inner leg, the top end part of the screw rod penetrates through the fixing plate from bottom to top, a limiting pin extending along the radial direction of the screw rod is connected on the screw rod in a penetrating manner, and two sides of the limiting pin penetrate through the screw rod and are pressed on the upper surface of the fixing plate.
10. The self-lubricating leg as set forth in claim 9 wherein the screw is externally fitted with a support plate between the fixing plate and the nut, the screw having a step surface, the support plate having a lower surface pressed against the step surface, and a thrust bearing disposed between the support plate and the fixing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122844637.7U CN216734221U (en) | 2021-11-19 | 2021-11-19 | Self-lubricating landing leg |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122844637.7U CN216734221U (en) | 2021-11-19 | 2021-11-19 | Self-lubricating landing leg |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216734221U true CN216734221U (en) | 2022-06-14 |
Family
ID=81929733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122844637.7U Active CN216734221U (en) | 2021-11-19 | 2021-11-19 | Self-lubricating landing leg |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216734221U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116161000A (en) * | 2022-12-23 | 2023-05-26 | 西安长峰机电研究所 | Vehicle-mounted two-stage mechanical transmission supporting leg |
-
2021
- 2021-11-19 CN CN202122844637.7U patent/CN216734221U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116161000A (en) * | 2022-12-23 | 2023-05-26 | 西安长峰机电研究所 | Vehicle-mounted two-stage mechanical transmission supporting leg |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101947476B (en) | Eccentric sleeve mechanism for cone crusher | |
| CN204472448U (en) | Durable type heavy lift cardan wheel | |
| CN216734221U (en) | Self-lubricating landing leg | |
| CN202673993U (en) | Universal ball head bearing | |
| CN201116448Y (en) | Rotary sealing joint for horizontal directional drilling machine | |
| CN109882089B (en) | Oiling-free rotary connector | |
| CN216618290U (en) | Bearing seat with replaceable bearing | |
| CN114165715A (en) | Bearing with durable lubricating structure | |
| CN210598856U (en) | Eccentric wear prevention protection device for sucker rod | |
| CN2540393Y (en) | Contact roller device of mine hoist | |
| CN211423152U (en) | Axial load-bearing structure of a bus door system | |
| CN218030076U (en) | Buffering antifriction connects | |
| CN2430422Y (en) | Ball screw lift device | |
| CN102537362A (en) | Energy-storing type compensator of stirrer | |
| CN116443128A (en) | Thrust wheel, side cover, wheel body, sealing, fine adjusting and oiling device thereof, and mounting and dismounting tool and method | |
| CN204878363U (en) | Outer spherical bearing with many lip seal circle | |
| CN221547549U (en) | Self-lubricating bearing sleeve | |
| CN209687912U (en) | A kind of spherical plain bearing rod end | |
| CN211004314U (en) | Oil rig derrick lifting pulley | |
| CN220283417U (en) | A kind of outrigger device and engineering machinery | |
| CN217814575U (en) | Novel self-aligning roller bearing | |
| CN104773651A (en) | Large tonnage hook capable of preventing rotary jamming | |
| CN213511740U (en) | Locking structure of joint bearing and pin shaft | |
| CN220769950U (en) | A kind of automatic self-aligning device for sleeve type thrust bearing | |
| CN205204709U (en) | A lock capstan winch voluntarily for aquaculture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |