CN211283462U - Buffering type supporting leg of crane - Google Patents
Buffering type supporting leg of crane Download PDFInfo
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- CN211283462U CN211283462U CN201922454118.2U CN201922454118U CN211283462U CN 211283462 U CN211283462 U CN 211283462U CN 201922454118 U CN201922454118 U CN 201922454118U CN 211283462 U CN211283462 U CN 211283462U
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- oil cylinder
- air cavity
- air
- connecting rod
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Abstract
The utility model discloses a buffer type supporting leg of a crane, which comprises an oil cylinder seat, a telescopic oil cylinder and a base; the bottom of the oil cylinder seat is provided with a telescopic oil cylinder, the bottom of the telescopic oil cylinder is provided with a sleeve, the bottom end of the sleeve is provided with an air cavity, the top of the connecting rod extends into the air cavity from the bottom end of the sleeve to realize clearance fit, and the bottom end of the connecting rod is positioned below the sleeve and is hinged with the base; a sealing ring is arranged on the side wall of the top of the connecting rod and is in close contact with the side wall of the air cavity; the top wall of the air cavity is provided with a cushion pad, and the side wall of the sleeve is provided with an air inlet and an air outlet which are communicated with the air cavity; a sleeve with an air cavity buffering function is arranged between the telescopic oil cylinder and the base, stress generated when the base is downwards contacted with the ground is firstly buffered by the air cavity for the first time, and because the diameter of the air outlet hole is smaller, the air cavity is pressed by the connecting rod to cause the air in the air cavity to be discharged through the air outlet hole until the top end of the connecting rod is propped against the buffer pad, and the buffer pad plays a secondary buffering function; the oil pressure of the pressure cavity of the telescopic oil cylinder is protected, and the service life of the hydraulic oil cylinder is prolonged.
Description
Technical Field
The utility model belongs to the technical field of crane machinery and specifically relates to a hoist buffering formula landing leg.
Background
The hoist is a many actions hoisting machinery who promotes perpendicularly and carry the heavy object with the level in the certain limit, in order to keep during operation automobile body stability and security, be equipped with the landing leg in pairs in the automobile body left and right sides, the landing leg includes the base of flexible hydro-cylinder and articulated flexible hydro-cylinder bottom, in operation, flexible hydro-cylinder downwardly extending is until base stable contact ground, but can produce great stress in the twinkling of an eye of contact, the oil pressure that leads to flexible hydro-cylinder pressure chamber rises in the twinkling of an eye, and frequent operation causes the hydro-cylinder part to damage easily, consequently need regularly to maintain the hydro-cylinder, waste time and energy.
SUMMERY OF THE UTILITY MODEL
In order to overcome among the prior art the great problem that leads to hydro-cylinder part to damage easily of instantaneous stress when crane landing leg and ground contact, the utility model provides a crane buffering formula landing leg can cushion stress, protection hydro-cylinder.
The utility model provides a technical scheme that its technical problem adopted is: a buffer type supporting leg of a crane comprises an oil cylinder seat, a telescopic oil cylinder and a base; the bottom of the oil cylinder seat is provided with a telescopic oil cylinder, the bottom of the telescopic oil cylinder is provided with a sleeve, the bottom end of the sleeve is provided with an air cavity, the top of the connecting rod extends into the air cavity from the bottom end of the sleeve to realize clearance fit, and the bottom end of the connecting rod is positioned below the sleeve and is hinged with the base; a sealing ring is arranged on the side wall of the top of the connecting rod and is in close contact with the side wall of the air cavity; the top wall of the air cavity is provided with a cushion pad, the side wall of the sleeve is provided with an air inlet hole and an air outlet hole which are communicated with the air cavity, the air inlet hole is positioned below the air outlet hole, and the top of the air outlet hole is flush with the bottom surface of the cushion pad; the side wall bottom of the connecting rod is connected with a baffle, the side wall of the oil cylinder seat is connected with a limiting rod extending downwards, the limiting rod is located above the baffle, and when the telescopic oil cylinder contracts upwards, the baffle is blocked by the limiting rod, so that the top of the connecting rod moves downwards in the air bag for a certain distance to drive the piston to move below the air inlet hole, and air in the external environment enters the air cavity through the air inlet hole.
The sleeve top surface is equipped with the recess, and flexible hydro-cylinder bottom is inserted in the recess and is realized the sleeve through a plurality of bolts at the sleeve lateral wall and be connected with flexible hydro-cylinder.
The buffer cushion is made of rubber, plays a role in secondary buffering when the top end of the connecting rod contacts the top wall of the air cavity, and is 5-10 mm thick.
The telescopic lateral wall corresponds the position at the venthole and is equipped with the protection shield, the protection shield top articulates on the sleeve lateral wall of venthole top, the protection shield receives gravity natural droop to shelter from the venthole, when the gas in the air cavity is compressed to connecting rod rebound, because the piston sheltered from the inlet port, the air that leads to in the air cavity passes through the venthole and backs down the protection shield and discharges, after the air escape, the protection shield receives the flagging reset of action of gravity, the protection shield can make the venthole play the effect of check valve, can prevent again that impurity among the external environment from getting into the venthole and leading to blockking up.
The buffering type supporting leg has the advantages that the sleeve with the air cavity buffering function is arranged between the telescopic oil cylinder and the base, the stress generated when the base is downwards contacted with the ground is firstly buffered by the air cavity for one time, the diameter of the air outlet is smaller, the air cavity is compressed by the connecting rod to cause the air in the air cavity to be discharged through the air outlet until the top end of the connecting rod is pushed to the buffering pad, and the buffering pad plays a secondary buffering role; the oil pressure of the pressure cavity of the telescopic oil cylinder is protected, and the service life of the hydraulic oil cylinder is prolonged.
Drawings
Reference will now be made in detail to the embodiments or drawings that are required for use in the description of the prior art, it being understood that the drawings in the following description are merely exemplary of the invention and that other drawings may be derived therefrom by those skilled in the art without the benefit of the inventive faculty.
Fig. 1 is a schematic structural view of the telescopic cylinder extending downwards to the lowest part.
Fig. 2 is a schematic structural view of the telescopic oil cylinder which is contracted upwards until the baffle is just contacted with the limiting rod.
Fig. 3 is a schematic structural view of the telescopic cylinder when the telescopic cylinder is contracted upwards to the uppermost position.
Fig. 4 is an enlarged schematic view of a in fig. 1.
The drawing shows that 1, an oil cylinder base, 2, a telescopic oil cylinder, 3, a base, 4, a sleeve, 5, an air cavity, 6, a connecting rod, 7, a sealing ring, 8, a cushion pad, 9, an air inlet, 10, an air outlet, 11, a baffle, 12, a limiting rod and 13, a protective plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments.
Referring to fig. 1-4, the embodiment provides a buffer type supporting leg of a crane, which comprises an oil cylinder base 1, a telescopic oil cylinder 2 and a base 3; the telescopic oil cylinder 2 is installed at the bottom of the oil cylinder base 1, the sleeve 4 is installed at the bottom of the telescopic oil cylinder 2, a groove is formed in the top surface of the sleeve 4, the bottom end of the telescopic oil cylinder 2 is inserted into the groove, and the sleeve 4 is connected with the telescopic oil cylinder 2 through a plurality of bolts on the side wall of the sleeve 4.
The bottom end of the sleeve 4 is provided with an air cavity 5, the top of the connecting rod 6 extends into the air cavity 5 from the bottom end of the sleeve 4 to realize clearance fit, the connecting rod 6 can move up and down in the sleeve 4 for a certain distance, and the bottom end of the connecting rod 6 is positioned below the sleeve 4 and is hinged with the base 3; the side wall of the top of the connecting rod 6 is provided with a sealing ring 7, and the sealing ring 7 is tightly contacted with the side wall of the air cavity 5, so that air cannot enter the air cavity 5 from the bottom end of the sleeve 4; a layer of cushion pad 8 is adhered to the top wall of the air cavity 5, and the cushion pad 8 is made of rubber and is 5-10 mm thick. The side wall of the sleeve 4 is provided with an air inlet hole 9 and an air outlet hole 10 which are communicated with the air cavity 5, the air inlet hole 9 is positioned below the air outlet hole 10, and the top of the air outlet hole 10 is flush with the bottom surface of the cushion pad 8, so that when the top end of the connecting rod 6 extends to the position of the sealing ring 7, all air in the air cavity 5 can be discharged from the air outlet hole 9; the bottom of the side wall of the connecting rod 6 is connected with a baffle 11, the side wall of the oil cylinder seat 1 is connected with a limiting rod 12 extending downwards, and the limiting rod 12 is positioned above the baffle 11; the parameters of the air inlet 9, the air outlet 10, the diameter of the air cavity 5 and the like can be obtained through routine experiments by a person skilled in the art to obtain an optimal combination scheme, so that the numerical range of the optimal combination scheme is not limited in the scheme.
The lateral wall of sleeve 4 is equipped with protection shield 13 in venthole 10 corresponding position, and protection shield 13 top articulates on the sleeve 4 lateral wall of venthole 10 top, and protection shield 13 receives gravity natural droop to shelter from venthole 10, and protection shield 13 can make venthole 10 play the effect of check valve, can prevent again that impurity among the external environment from getting into venthole 10 and leading to blockking up.
The utility model discloses when flexible hydro-cylinder 2 extends, base 3 is laminating ground earlier, because connecting rod 6 top also has air cavity 5, produce great stress in the twinkling of an eye when base 3 contacts ground, the air in air cavity 5 can play certain cushioning effect, then connecting rod 6 continues to move to the top, remove in-process sealing washer 7 and remove and can block the inlet port to inlet port 9 top, make the air can only follow venthole 10 and break protection shield 13 and slowly discharge, until connecting rod 6 top contact blotter 8, flexible hydro-cylinder 2 stops to extend, carry out jack-up work, form the state that figure 1 demonstrates.
In the processes of fig. 1 to 2, after the lifting operation is completed, the supporting legs need to be lifted away from the ground, at the moment, the telescopic oil cylinder 2 is shortened and lifted, the base 3 gradually leaves the ground, and because the sealing ring 7 is in close contact with the inner side wall of the air cavity 5, the sleeve 4 is kept at the top position of the air cavity 5 until the baffle 11 touches the limiting rod 12, and in order to keep the stress balance of the connecting rod 6, the baffle 11 and the limiting rod 12 can be arranged on both sides of the connecting rod 6 and both sides of the oil cylinder seat 1.
In the process of fig. 2 to 3, the telescopic oil cylinder 2 continues to shorten and ascend, but the baffle 11 is blocked by the limiting rod 12, so that the sleeve 4 keeps the height unchanged, a gap exists between the connecting rod 6 and the buffer pad 8, the air inlet hole 9 moves to the position above the sealing ring 7, and external air enters the air cavity 5 from the air inlet hole 9 to prepare for buffering the next descending.
The above description is not limited to the above examples, and technical features of the present invention that are not described may be implemented by or using the prior art, and are not described herein again; the above embodiments and drawings are only used for illustrating the technical solutions of the present invention, and the present invention has been described in detail with reference to the preferred embodiments, and those skilled in the art should understand that changes, modifications, additions or substitutions made by those skilled in the art within the spirit of the present invention do not depart from the spirit of the present invention, and shall also belong to the protection scope of the claims of the present invention.
Claims (4)
1. A buffer type supporting leg of a crane comprises an oil cylinder base (1), a telescopic oil cylinder (2) and a base (3); the bottom of the oil cylinder seat (1) is provided with a telescopic oil cylinder (2), and the oil cylinder is characterized in that the bottom of the telescopic oil cylinder (2) is provided with a sleeve (4), the bottom end of the sleeve (4) is provided with an air cavity (5), the top of a connecting rod (6) extends into the air cavity (5) from the bottom end of the sleeve (4) to realize clearance fit, and the bottom end of the connecting rod (6) is positioned below the sleeve (4) and is hinged with the base (3); a sealing ring (7) is arranged on the side wall of the top of the connecting rod (6), and the sealing ring (7) is tightly contacted with the side wall of the air cavity (5); the top wall of the air cavity (5) is provided with a cushion pad (8), the side wall of the sleeve (4) is provided with an air inlet hole (9) and an air outlet hole (10) which are communicated with the air cavity (5), the air inlet hole (9) is positioned below the air outlet hole (10), and the top of the air outlet hole (10) is flush with the bottom surface of the cushion pad (8); the side wall bottom of connecting rod (6) connects baffle (11), and downwardly extending's gag lever post (12) is connected to the lateral wall of hydro-cylinder seat (1), and gag lever post (12) are located the top of baffle (11).
2. The crane buffer type landing leg as claimed in claim 1, wherein a groove is formed in the top surface of the sleeve (4), the bottom end of the telescopic cylinder (2) is inserted into the groove, and the sleeve (4) is connected with the telescopic cylinder (2) through a plurality of bolts on the side wall of the sleeve (4).
3. A crane buffer leg as claimed in claim 1, characterized in that the buffer pad (8) is of rubber material and has a thickness of 5-10 mm.
4. The crane buffer leg as claimed in claim 1, wherein the outer side wall of the sleeve (4) is provided with a protection plate (13) at the position corresponding to the air outlet (10), and the top of the protection plate (13) is hinged on the outer side wall of the sleeve (4) above the air outlet (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922454118.2U CN211283462U (en) | 2019-12-31 | 2019-12-31 | Buffering type supporting leg of crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922454118.2U CN211283462U (en) | 2019-12-31 | 2019-12-31 | Buffering type supporting leg of crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211283462U true CN211283462U (en) | 2020-08-18 |
Family
ID=72015996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922454118.2U Active CN211283462U (en) | 2019-12-31 | 2019-12-31 | Buffering type supporting leg of crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211283462U (en) |
-
2019
- 2019-12-31 CN CN201922454118.2U patent/CN211283462U/en active Active
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